JP2014185315A - Liquid crystal composition and liquid crystal display using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal composition having positive Δε, a liquid crystal phase having a wide temperature range, good solubility at low temperature, excellent ODF process compatibility, high specific electric resistance or high voltage retention, and stability to heat or light.SOLUTION: There is provided a liquid crystal composition having a positive dielectric anisotropy and containing a compound represented by the formula (i) and at least one kind of compound represented by a compound having a terphenyl structure of which a skeleton aromatic ring may be substituted by fluorine.

Description

  The present invention relates to a nematic liquid crystal composition having a positive dielectric anisotropy (Δε) useful as a liquid crystal display material, and a liquid crystal display device using the same.

  Liquid crystal display elements are used in various measuring instruments, automobile panels, word processors, electronic notebooks, printers, computers, televisions, watches, advertisement display boards, as well as watches and calculators. Typical liquid crystal display methods include TN (twisted nematic) type, STN (super twisted nematic) type, vertical alignment type using TFT (thin film transistor), and IPS (in-plane switching) type. Etc. The liquid crystal composition used in these liquid crystal display elements is stable against external stimuli such as moisture, air, heat, light, etc., and exhibits a liquid crystal phase in the widest possible temperature range centering on room temperature. And a low driving voltage is required. Further, the liquid crystal composition is composed of several to several tens of kinds of compounds in order to optimize the dielectric anisotropy (Δε), the refractive index anisotropy (Δn) and the like for each display element.

  In a vertical alignment (VA) type display, a liquid crystal composition having a negative Δε is used, and in a horizontal alignment type display such as a TN type, STN type, or IPS (in-plane switching) type, a liquid crystal composition having a positive Δε. Is used. In addition, a driving method has been reported in which a liquid crystal composition having a positive Δε is vertically aligned when no voltage is applied and a horizontal electric field is applied to display the liquid crystal composition, and the necessity of a liquid crystal composition having a positive Δε is further increased. Yes. On the other hand, low voltage driving, high-speed response, and a wide operating temperature range are required in all driving systems. That is, Δε is positive, the absolute value is large, the viscosity (η) is small, and a high nematic phase-isotropic liquid phase transition temperature (Tni) is required. In order to set Δn × d, which is the product of Δn and the cell gap (d), to a predetermined value, it is necessary to adjust Δn of the liquid crystal composition to an appropriate range according to the cell gap. In addition, when applying a liquid crystal display element to a television or the like, since high-speed response is important, a liquid crystal composition having a low rotational viscosity (γ1) is required.

Examples of the composition of the liquid crystal composition intended for high-speed response include, for example, compounds represented by formulas (A-1) and (A-2), in which Δε is a positive liquid crystal compound, and Δε is a neutral liquid crystal compound. A liquid crystal composition using a combination of (B) is disclosed. As characteristics of these liquid crystal compositions, it is widely known in the field of liquid crystal compositions that a liquid crystal compound having a positive Δε has a —CF ₂ O— structure and that a liquid crystal compound having a negative Δε has an alkenyl group. (Patent Documents 1 to 4).

On the other hand, the use of liquid crystal display elements has been expanded, and there has been a significant change in the method of use and manufacturing method. In order to cope with these changes, it has become necessary to optimize characteristics other than the basic physical property values as conventionally known. That is, liquid crystal display elements using a liquid crystal composition are widely used, such as VA type and IPS type, and super large size display elements having a size of 50 type or more are practically used. Became. As the substrate size increased, the method of injecting the liquid crystal composition into the substrate also changed, and the drop injection (ODF: One Drop Fill) method became the main method of injection from the conventional vacuum injection method. However, the problem that the drop marks when the liquid crystal composition is dropped on the substrate causes the display quality to deteriorate has been brought to the surface.
Furthermore, in the liquid crystal display element manufacturing process by the ODF method, it is necessary to drop an optimum amount according to the size of the liquid crystal display element. When the drop amount deviation increases from the optimum value, the balance between the refractive index and the driving electric field of the liquid crystal display element designed in advance is lost, and display defects such as spots and poor contrast occur. In particular, small liquid crystal display elements that are frequently used in smartphones that have been popular recently have a small amount of liquid crystal dripping, and it is difficult to control the deviation from the optimum value within a certain range. Therefore, in order to keep the manufacturing yield of the liquid crystal display element high, the liquid crystal composition is less affected by, for example, a sudden pressure change or impact in the dropping device that occurs when the liquid crystal is dropped, and can be stably dropped over a long period of time. There is a need to be able to continue.

  As described above, in the liquid crystal composition used for the active matrix drive liquid crystal display element driven by the TFT element or the like, the high-speed response performance required as the liquid crystal display element is taken into consideration while considering the manufacturing method of the liquid crystal display element. There has been a demand for development in pursuit of high specific resistance, high voltage holding ratio, or improvement in stability against external stimuli such as light and heat.

JP 2008-037918 A JP 2008-038018 A JP 2010-275390 A JP 2011-052120 A

  The problem to be solved by the present invention is a liquid crystal composition having a positive Δε, a liquid crystal phase in a wide temperature range, low viscosity, good solubility at low temperature, specific resistance and voltage holding ratio. Provides a liquid crystal composition that is stable against heat and light, and by using this, yields a liquid crystal display element that exhibits excellent display quality by suppressing display defects due to image sticking or dripping marks. It is to provide well and to provide a liquid crystal display element using the liquid crystal composition.

The present invention includes the following aspects.
(1) A liquid crystal composition having positive dielectric anisotropy, comprising a compound represented by the following formula (i) and at least one compound represented by the following general formula (ii) A liquid crystal composition characterized by that.

In the general formula (ii), R ⁱⁱ¹ and R ⁱⁱ² each independently represents an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 4 to 5 carbon atoms, and X ⁱⁱ¹ and X ⁱⁱ² are respectively Independently, it represents a hydrogen atom or a fluorine atom.

(2) The liquid crystal composition according to (1), wherein in general formula (ii), one of X ⁱⁱ¹ and X ⁱⁱ² represents a hydrogen atom and the other represents a fluorine atom.

(3) As at least one compound represented by the general formula (ii), a compound represented by the following formula (ii.2.1), and a compound represented by the following formula (ii.2.2) The liquid crystal composition according to item (2), wherein at least one compound selected from the group consisting of compounds is contained in an amount of 0.5% by mass or more and less than 5% by mass with respect to the total mass of the liquid crystal composition.

(4) The at least one compound represented by the general formula (ii) contains a compound represented by the following formula (ii.1.3), as described in the above (2) or (3) Liquid crystal composition.

(5) The at least one compound represented by the general formula (ii) is represented by the following formula (ii.2.9) and the following formula (ii.2.10) The liquid crystal composition according to any one of (2) to (4), comprising at least one compound selected from the group consisting of compounds.

(6) The liquid crystal composition according to any one of (1) to (5), further containing at least one compound represented by the following general formula (L).

In the general formula (L),
R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and at least two non-adjacent —CH ₂ — in the alkyl group are each independently —CH _2. ═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO— may be substituted,
OL represents 0, 1, 2 or 3;
B ^L1 , B ^L2 and B ^L3 are each independently
(A) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or at least two non-adjacent —CH ₂ — may be replaced by —O—), and ,
(B) a 1,4-phenylene group (one -CH = present in the group or at least two non-adjacent -CH = may be replaced by -N =),
Each of the groups (a) and (b) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom,
L ^L1 and L ^L2 each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, — OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—
When OL is 2 or 3 and a plurality of L ^L2 are present, they may be the same or different, and when OL is 2 or 3 and a plurality of B ^L3 is present, they are the same However, the compound represented by the general formula (ii) is excluded.

(7) The liquid crystal composition according to any one of (1) to (6), further containing at least one compound represented by the following general formula (M).

In the general formula (M),
R ^M1 represents an alkyl group having 1 to 8 carbon atoms, and at least one non-adjacent —CH ₂ — in the alkyl group is independently —CH═CH—, —C. ≡C—, —O—, —CO—, —COO— or —OCO— may be substituted,
PM represents 0, 1, 2, 3 or 4;
C ^M1 and C ^M2 are each independently
(D) 1,4-cyclohexylene group (in this group, one —CH ₂ — or at least two —CH ₂ — which are not adjacent to each other may be replaced by —O— or —S—). Good) and
(E) a 1,4-phenylene group (one -CH = present in the group or at least two non-adjacent -CH = may be replaced by -N =),
The group (d) and the group (e) are each independently substituted with a cyano group, a fluorine atom or a chlorine atom,
K ^M1 and K ^M2 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O. -, -COO-, -OCO- or -C≡C-
When PM is 2, 3 or 4 and there are a plurality of K ^M1 , they may be the same or different, and when PM is 2, 3 or 4 and there are a plurality of C ^M2 They may be the same or different,
X ^M1 and X ^M3 each independently represent a hydrogen atom, a chlorine atom or a fluorine atom,
X ^M2 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, or a 2,2,2-trifluoroethyl group, The compound represented by (i) is excluded.

(8) In the item (6) or (7), which contains at least one compound represented by the following general formula (II-2) as at least one compound represented by the general formula (L) The liquid crystal composition described.

In the general formula (II-2), R ²³ represents an alkenyl group having 2 to 5 carbon atoms, and R ²⁴ represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.

(9) The compound represented by the following formula (11.2) as the at least one compound represented by the general formula (II-2) is at least 13% by mass with respect to the total mass of the liquid crystal composition. The liquid crystal composition according to item (8), which is contained.

(10) The item (7) to (9), which contains at least one compound represented by the following general formula (X-6) as at least one compound represented by the general formula (M). The liquid crystal composition according to any one of the above.

In the general formula (X-6), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

(11) The compound represented by the following formula (44.1) as the at least one compound represented by the general formula (X-6) is 0.5 mass relative to the total mass of the liquid crystal composition. The liquid crystal composition according to item (10), which is contained in an amount of 4% to 4% by mass.

(12) The above (7) to (11) containing at least one compound represented by the following general formula (IX-2-2) as at least one compound represented by the general formula (M) The liquid crystal composition according to any one of items.

In the general formula (IX-2-2), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

(13) As at least one compound represented by the general formula (IX-2-2), a compound represented by the following formula (31.2) is at least 9 with respect to the total mass of the liquid crystal composition. The liquid crystal composition according to item (12), which is contained by mass%.

(14) The above (7) to (13) containing at least one compound represented by the following general formula (IX-2-3) as at least one compound represented by the general formula (M) The liquid crystal composition according to any one of items.

In the general formula (IX-2-3), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

(15) As at least one compound represented by the general formula (IX-2-3), a compound represented by the following formula (32.2) is added to the total mass of the liquid crystal composition in an amount of 0.0. The liquid crystal composition according to (14), which is contained in an amount of 5% by mass or more and less than 5% by mass.

(16) As at least one compound represented by the general formula (IX-2-3), a compound represented by the following formula (32.4) is added to the total mass of the liquid crystal composition in an amount of 0.8. The liquid crystal composition according to (14) or (15), which is contained in an amount of 5% by mass or more and less than 5% by mass.

(17) The above (7) to (16) containing at least one compound represented by the following general formula (IX-2-1) as at least one compound represented by the general formula (M) ) The liquid crystal composition according to any one of items.

In the general formula (IX-2-1), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

(18) The liquid crystal composition according to item (17), comprising a compound represented by formula (30.1) as at least one compound represented by formula (IX-2-1). .

(19) The at least one compound represented by the general formula (IX-2-1) contains the compound represented by the formula (30.2) as described in the above (17) or (18) Liquid crystal composition.

(20) The at least one compound represented by the general formula (M) contains at least one compound represented by the following general formula (X-2-1), (7) to (19) ) The liquid crystal composition according to any one of items.

In the general formula (X-2-1), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

(21) The liquid crystal composition according to item (20), comprising a compound represented by formula (39.2) as at least one compound represented by formula (X-2-1). .

(22) The above (7) to (21) containing at least one compound represented by the following general formula (X-3-1) as at least one compound represented by the general formula (M) ) The liquid crystal composition according to any one of items.

In the general formula (X-3-1), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

(23) The compound represented by the formula (41.2) as the at least one compound represented by the general formula (X-3-1) is 0.5% with respect to the total mass of the liquid crystal composition. The liquid crystal composition according to item (22), which is contained by mass% or more and less than 2 mass%.

(24) The above (7) to (23) containing at least one compound represented by the following general formula (XIV-2-2) as at least one compound represented by the general formula (M) ) The liquid crystal composition according to any one of items.

In the general formula (XIV-2-2), R ¹⁴⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

(25) The liquid crystal composition according to item (24), containing a compound represented by formula (54.2) as at least one compound represented by formula (XIV-2-2). .

(26) The at least one compound represented by the general formula (XIV-2-2) contains the compound represented by the formula (54.4), as described in the above (24) or (25) Liquid crystal composition.

(27) The items (7) to (26), containing at least one compound represented by the following general formula (XIV-1) as at least one compound represented by the general formula (M): The liquid crystal composition according to any one of the above.

In the general formula (XIV-1), R ¹⁴⁰ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms, and Y ¹⁴ represents a fluorine atom. Represents a chlorine atom or —OCF ₃ .

(28) At least 8% by mass of the compound represented by the formula (51.1) as the at least one compound represented by the general formula (XIV-1) with respect to the total mass of the liquid crystal composition The liquid crystal composition according to item (27).

(29) The items (6) to (28), containing at least one compound represented by the following general formula (I-2) as at least one compound represented by the general formula (L): The liquid crystal composition according to any one of the above.

In the general formula (I-2), R ¹³ and R ¹⁴ each independently represents an alkyl group having 1 to 5 carbon atoms.

(30) At least 6% by mass of the compound represented by the formula (3.1) as the at least one compound represented by the general formula (I-2) with respect to the total mass of the liquid crystal composition The liquid crystal composition according to item (29).

(31) At least 6% by mass of the compound represented by the formula (3.3) as the at least one compound represented by the general formula (I-2) with respect to the total mass of the liquid crystal composition The liquid crystal composition according to item (29) or (30).

(32) At least 3% by mass of the compound represented by the formula (3.4) as the at least one compound represented by the general formula (I-2) with respect to the total mass of the liquid crystal composition The liquid crystal composition according to any one of (29) to (31).

(33) The above items (6) to (32) containing at least one compound represented by the following general formula (I-5) as at least one compound represented by the general formula (L): The liquid crystal composition according to any one of the above.

In the general formula (I-5), R ¹¹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and R ¹² represents a carbon atom. An alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms is represented.

(34) The liquid crystal composition according to item (33), containing a compound represented by formula (6.6) as at least one compound represented by formula (I-5).

(35) The above (7) to (34) containing at least one compound represented by the following general formula (X-4-1) as at least one compound represented by the general formula (M). ) The liquid crystal composition according to any one of items.

In General Formula (X-4-1), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

(36) The liquid crystal composition according to item (35), which contains a compound represented by formula (42.3) as at least one compound represented by formula (X-4-1). .

(37) The liquid crystal composition according to any one of (1) to (36), further including a compound represented by the following formula (2.5).

(38) The above items (7) to (37), containing at least one compound represented by the following general formula (XIII-3) as at least one compound represented by the general formula (M): The liquid crystal composition according to any one of the above.

In the general formula (XIII-3), R ¹³⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

(39) The liquid crystal composition according to item (38), comprising a compound represented by formula (50.1) as at least one compound represented by formula (XIII-3).

(40) The liquid crystal composition according to any one of (1) to (39), further including a compound represented by the following general formula (Qa).

In the general formula (Qa), R ^Q1 represents a linear alkyl group or branched alkyl group having 1 to 10 carbon atoms.

(41) The liquid crystal composition according to item (40), which contains a compound represented by the following formula (Qa-1) as the compound represented by the general formula (Qa).

(42) The liquid crystal composition according to any one of (1) to (41), further including a compound represented by the following general formula (Qc).

In the general formula (Qc), ^RQ3 represents a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group, a linear alkoxy group, or a branched alkoxy group.

(43) The liquid crystal composition according to item (42), which contains a compound represented by the following formula (Qc-1) as the compound represented by the general formula (Qc).

(44) In any one of the above items (6) to (43), which contains a compound represented by the following formula (12.4) as at least one compound represented by the general formula (L) The liquid crystal composition described.

(45) The liquid crystal composition according to any one of (1) to (44), further including a compound represented by the following formula (62.1).

(46) A liquid crystal display device using the liquid crystal composition according to any one of (1) to (45).
(47) The liquid crystal display element according to item (46), wherein the display method is an IPS mode.
(48) The liquid crystal display element according to the above (46), wherein the display method is OCB mode.
(49) The liquid crystal display element according to item (46), wherein the display method is an ECB mode.
(50) The liquid crystal display element according to item (46), wherein the display method is a VA mode.
(51) The liquid crystal display element according to the above (46), wherein the display method is a VA-IPS mode.
(52) The liquid crystal display element according to the above (46), wherein the display method is an FFS mode.
(53) A liquid crystal display using the liquid crystal display element according to any one of (46) to (52).

  The composition having a positive dielectric anisotropy of the present invention has significantly improved solubility at a lower temperature than the conventional one while maintaining low viscosity, high specific resistance, and high voltage holding ratio. In the liquid crystal display element manufacturing process by the ODF method, stable dripping can be continued for a long time. For this reason, the composition of the present invention can produce a liquid crystal display element exhibiting excellent display quality with suppressed display defects caused by the production process, and has high practicality (applicability) to liquid crystal products. A liquid crystal display element such as an IPS (in-plane switching) type or FFS (fringe field switching) type using the above can achieve a high-speed response.

It is sectional drawing of the liquid crystal display element of this invention. A substrate having 100 to 105 is referred to as a “back plane”, and a substrate having 200 to 205 is referred to as a “front plane”. It is a figure of the exposure process using the pattern for columnar spacer formation formed on a black matrix as a photomask pattern.

  The liquid crystal composition of the present invention is a liquid crystal composition having positive dielectric anisotropy and contains a compound represented by the following formula (i) and a compound represented by the following general formula (ii). The liquid crystal composition will be described below, but “%” not specifically indicated means “mass%”. Moreover, as preferable content of each compound, preferable content in case the said compound is mix | blended with a liquid crystal composition is illustrated (however, the case where a lower limit shall be 0 mass%).

In the general formula (ii), R ⁱⁱ¹ and R ⁱⁱ² each independently represents an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 4 to 5 carbon atoms, and X ⁱⁱ¹ and X ⁱⁱ² are respectively Independently, it represents a hydrogen atom or a fluorine atom.
One of X ⁱⁱ¹ and X ⁱⁱ² preferably represents a hydrogen atom and the other represents a fluorine atom.

  The content of the compound represented by formula (i) in the liquid crystal composition is not particularly limited, but is preferably 1% by mass or more with respect to the total mass of the liquid crystal composition, and is 2% by mass or more. 3 mass% or more is preferable, 4 mass% or more is preferable, 5 mass% or more is preferable, 6 mass% or more is preferable, 8 mass% or more is preferable, 9 mass% or more is preferable, and 11 mass% is preferable. % Or more is preferable. On the other hand, in consideration of solubility at low temperature, nematic phase-isotropic liquid phase transition temperature, electrical reliability, etc., the content of the compound represented by formula (i) in the liquid crystal composition is: The total mass of the liquid crystal composition is preferably 35% by mass or less, preferably 30% by mass or less, preferably 25% by mass or less, and preferably 20% by mass or less. 15 mass% or less, preferably 11 mass% or less. Among these, the content of the compound represented by the formula (i) in the liquid crystal composition is preferably 1 to 35% by mass with respect to the total mass of the liquid crystal composition of the present invention. It is preferably 30% by mass, preferably 1 to 25% by mass, preferably 1 to 20% by mass, preferably 1 to 15% by mass, and 3 to 35% by mass. Is preferably 4 to 35% by mass, preferably 6 to 35% by mass, preferably 8 to 15% by mass, and preferably 9 to 35% by mass. It is preferably mass%, preferably 2 to 11 mass%, preferably 3 to 8 mass%, preferably 5 to 10 mass%, and 7 to 11 mass%. preferable.

  The content of the compound represented by the general formula (ii) in the liquid crystal composition is 1 mass with respect to the total mass of the liquid crystal composition of the present invention from the viewpoint of response speed, electrical and optical reliability. % Or more, preferably 4% by weight or more, preferably 8% by weight or more, preferably 10% by weight or more, preferably 11% by weight or more, preferably 13% by weight or more, preferably 15% by weight or more, 22% by weight The above is preferable, and 26 mass% or more is preferable. On the other hand, the content of the compound represented by the general formula (ii) in the liquid crystal composition is preferably 40% by mass or less, preferably 35% by mass or less, based on the total mass of the liquid crystal composition of the present invention. 30 mass% or less is preferable, 26 mass% or less is preferable, 22 mass% or less is preferable, 15 mass% or less is preferable, 13 mass% or less is preferable, and 10 mass% or less is preferable. Among these, the content of the compound represented by the general formula (ii) in the liquid crystal composition is preferably 1 to 40% by mass with respect to the total mass of the liquid crystal composition of the present invention. -35% by mass is preferable, 1-30% by mass is preferable, 1-26% by mass is preferable, 1-22% by mass is preferable, and 1-17% by mass is preferable. It is preferably 1 to 15% by mass, preferably 1 to 13% by mass, preferably 1 to 10% by mass, preferably 1 to 7% by mass, It is preferably 3% by mass, preferably 4 to 40% by mass, preferably 7 to 40% by mass, preferably 11 to 40% by mass, and 13 to 40% by mass. Is preferred, 22-4 It is preferable that it is mass%, it is preferable that it is 26-40 mass%, it is preferable that it is 7-17 mass%, it is preferable that it is 11-13 mass%, and it is 13-16 mass%. Preferably, it is 20-26 mass%.

  The total content of the compound represented by the formula (i) and the compound represented by the general formula (ii) is preferably 2% by mass or more with respect to the total mass of the liquid crystal composition. % Or more, preferably 7% by weight or more, preferably 10% by weight or more, preferably 11% by weight or more, preferably 14% by weight or more, preferably 15% by weight or more, and 16% by weight or more. 19 mass% or more is preferable, 21 mass% or more is preferable, 24 mass% or more is preferable, 26 mass% or more is preferable, 31 mass% or more is preferable, and 33 mass% or more is preferable. On the other hand, the total content of the compound represented by the formula (i) and the compound represented by the general formula (ii) is preferably 45% by mass or less based on the total mass of the liquid crystal composition, It is preferably 40% by mass or less, preferably 35% by mass or less, preferably 33% by mass or less, preferably 31% by mass or less, and preferably 27% by mass or less, It is preferably 24% by mass or less, preferably 22% by mass or less, preferably 21% by mass or less, preferably 20% by mass or less, and preferably 19% by mass or less, It is preferably 16% by mass or less, preferably 15% by mass or less, preferably 14% by mass or less, preferably 12% by mass or less, and preferably 10% by mass or less. Preferably there is preferably no greater than 7 wt%. Among these, the total content of the compound represented by the formula (i) and the compound represented by the general formula (ii) is 2 to 45% by mass with respect to the total mass of the liquid crystal composition. Is preferable, 5 to 40% by mass is preferable, 5 to 35% by mass is preferable, 5 to 33% by mass is preferable, 5 to 31% by mass is preferable, and 5 to 24 is preferable. It is preferably 5% by weight, preferably 5-21% by weight, preferably 5-19% by weight, preferably 5-16% by weight, and 5-14% by weight. Preferably, 5 to 10 mass% is preferable, 5 to 7 mass% is preferable, 7 to 45 mass% is preferable, 10 to 45 mass% is preferable, and 14 to 45 mass% is preferable, and 15 to 15 mass% is preferable. 45% by mass is preferred It is preferably 16 to 45 mass%, preferably 19 to 45 mass%, preferably 21 to 45 mass%, preferably 24 to 45 mass%, and 31 to 45 mass%. %, Preferably 33-45% by weight, preferably 5-7% by weight, preferably 7-12% by weight, and preferably 10-15% by weight. It is preferably 11 to 15% by mass, preferably 14 to 16% by mass, preferably 17 to 27% by mass, preferably 17 to 22% by mass, and 17 to 20% by mass. It is preferable that it is 26-33 mass%.

  The compound represented by the general formula (ii) is contained in at least one kind in the liquid crystal composition of the present invention. When at least two compounds represented by the general formula (ii) are blended, they are appropriately combined depending on required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. It is.

  The compound represented by the general formula (ii) is preferably at least one compound selected from the group of compounds represented by the following general formula (ii-1).

In the general formula (ii-1), R ^ii1a and R ^ii2a each independently represents an alkyl group having 1 to 5 carbon atoms.

  The content of the compound represented by the general formula (ii-1) is low temperature solubility, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, dielectric constant anisotropic It is necessary to adjust appropriately according to the required performance such as property.

  The content of the compound represented by the general formula (ii-1) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 35% by mass in one embodiment. Furthermore, in another embodiment of this invention, the said content is 1-30 mass%. Furthermore, in another embodiment of this invention, the said content is 1-26 mass%. In still another embodiment of the present invention, the content is 1% to 22% by mass. Furthermore, in another embodiment of this invention, the said content is 1-16 mass%. Furthermore, in another embodiment of this invention, the said content is 1-15 mass%. Furthermore, in another embodiment of this invention, the said content is 1-13 mass%. Furthermore, in another embodiment of this invention, the said content is 1-11 mass%. Furthermore, in another embodiment of this invention, the said content is 1-10 mass%. Furthermore, in another embodiment of this invention, the said content is 1-8 mass%. Furthermore, in another embodiment of this invention, the said content is 1-4 mass%. Furthermore, in another embodiment of this invention, the said content is 1-3 mass%. In still another embodiment of the present invention, the content is 4% to 35% by mass. Furthermore, in another embodiment of this invention, the said content is 8-35 mass%. Furthermore, in another embodiment of this invention, the said content is 11-35 mass%. Furthermore, in another embodiment of this invention, the said content is 13-35 mass%. Furthermore, in another embodiment of this invention, the said content is 15-35 mass%. Furthermore, in another embodiment of this invention, the said content is 20-35 mass%. Furthermore, in another embodiment of this invention, the said content is 22-35 mass%. Furthermore, in another embodiment of this invention, the said content is 26-35 mass%. Furthermore, in another embodiment of this invention, the said content is 11-13 mass%. Furthermore, in another embodiment of this invention, the said content is 13-16 mass%. Furthermore, in another embodiment of this invention, the said content is 20-26 mass%.

  Furthermore, the compound represented by the general formula (ii-1) is, for example, at least one compound selected from the group of compounds represented by the formula (ii.1.1) to the formula (ii.1.9). It is preferable that it is a compound represented by formula (ii.1.3).

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It is preferable to contain 1 type-3 types from these compounds, and it is more preferable to contain 1 type-4 types. Further, since the wide molecular weight distribution of the compound to be selected is effective for solubility, for example, one type of the compound represented by the formula (ii.1.1) or the formula (ii.1.2), the formula (ii) .1.4) or one type from the compound represented by formula (ii.1.5), one type from the compound represented by formula (ii.1.6) or formula (ii.1.7), the formula It is preferable to select one type of compound from the compounds represented by (ii.1.8) or formula (ii.1.9) and combine them appropriately. Among them, formula (ii.1.1), formula (ii.1.3), formula (ii.1.4), formula (ii.1.6), and / or formula (ii.1.9) It is preferable that the compound represented by this is included.

  The content of the compound represented by the general formula (ii.1.1) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, dielectric constant. It is necessary to adjust appropriately according to the required performance such as anisotropy. For example, the content of the compound represented by the general formula (ii.1.1) with respect to the total mass of the liquid crystal composition of the present invention is 4 to 20% by mass in one embodiment of the present invention. In another embodiment of the present invention, it is 11 to 20% by mass, and in another embodiment of the present invention, it is preferably 11 to 14% by mass. Among these, it is preferable that content of the compound represented by the said general formula (ii.1.1) is 11 mass% or more with respect to the total mass of the liquid-crystal composition of this invention, 11-20. It is more preferably mass%, and even more preferably 11-14 mass%.

  The content of the compound represented by the general formula (ii.1.3) is low temperature solubility, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, dielectric constant. It is necessary to adjust appropriately according to the required performance such as anisotropy. For example, the content of the compound represented by the general formula (ii.1.3) is preferably 1 to 20% by mass, and 1 to 15% by mass with respect to the total mass of the liquid crystal composition of the present invention. It is preferable that it is 3-12 mass%, 5-10 mass% is still more preferable.

  In the liquid crystal composition in which the compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is only the compound represented by the formula (ii.1.3), the total mass of the liquid crystal composition The total content of the compound represented by the formula (i) and the compound represented by the formula (ii.1.3) is preferably 3 to 27% by mass, more preferably 7 to 22% by mass. -17 mass% is still more preferable.

  There are two types of compounds represented by the general formula (ii) contained in the liquid crystal composition of the present invention, and the compound represented by the general formula (ii) is represented by the formula (ii.1.1). In a liquid crystal composition which is a compound represented by formula (ii.1.3) and the compound represented by formula (i) relative to the total mass of the liquid crystal composition, and the formula (ii.1) .1) and the total content of the compound represented by the formula (ii.1.3) are preferably 5 to 30% by mass, more preferably 10 to 25% by mass, and 15 to 22% by mass. % Is even more preferred.

  Alternatively / further, the compound represented by the general formula (ii) is preferably at least one compound selected from the group of compounds represented by the general formula (ii-2), for example.

In the general formula (ii-2), R ^ii1b and R ^ii2b each independently represent an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, at least one of which is carbon An alkenyl group having 2 to 5 atoms is represented, and X ^ii1b and X ^ii2b each independently represent a hydrogen atom or a fluorine atom.

  There are no particular limitations on the types of compounds that can be combined, but they are appropriately combined according to required performance such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.

  The content of the compound represented by the general formula (ii-2) is low temperature solubility, transition temperature, electrical reliability, birefringence index, process compatibility, drop mark, image sticking, anisotropic dielectric constant. It is necessary to adjust appropriately according to the required performance such as property. For example, the content of the compound represented by the general formula (ii-2) is preferably 0.5 to 20% by mass with respect to the total mass of the liquid crystal composition of the present invention, and 0.5 to 15 It is preferable that it is mass%, it is preferable that it is 0.5-10 mass%, it is preferable that it is 0.5-7 mass%, and it is preferable that it is 1-7 mass%.

  Furthermore, the compound represented by the general formula (ii-2) is, for example, at least one compound selected from the group of compounds represented by formula (ii.2.1) to formula (ii.2.10). Among them, it is represented by formula (ii.2.1), formula (ii.2.2), formula (ii.2.9), and / or formula (ii.2.10). It is preferable that it is a compound, and it is preferable that it is a compound represented by Formula (ii.2.2) and / or Formula (ii.2.10).

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (ii.2.1) or the formula (ii.2.2) depends on solubility at low temperature, transition temperature, and electrical reliability. In consideration of the properties and the like, it is preferably 0.5% by mass or more and 10% by mass or less, and preferably 0.5% by mass or more and 7% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. More preferably, it is more preferably 0.5% by mass or more and less than 5% by mass, and particularly preferably 0.5% by mass or more and 2% by mass or less.

  In the liquid crystal composition containing only one of the compounds represented by the formula (ii.2.1) or the formula (ii.2.2) as the compound represented by the general formula (ii), The content of the compound represented by the formula (ii.2.1) or the formula (ii.2.2) is 0.5% by mass or more and less than 5% by mass with respect to the total mass of the liquid crystal composition. Yes, it is preferably 0.5 mass% or more and 2 mass% or less.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (ii.2.4) is determined in consideration of solubility at low temperatures, transition temperature, electrical reliability, and the like. 1 mass% or more and 15 mass% or less are preferable with respect to the total mass of a liquid-crystal composition, 1 mass% or more and 10 mass% or less are preferable, and 1 mass% or more and 5 mass% or less are preferable.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (ii.2.9) is determined in consideration of the solubility at low temperatures, the transition temperature, the electrical reliability, and the like. 0.5 mass% or more and 15 mass% or less are more preferable with respect to the total mass of a liquid crystal composition, 0.5 mass% or more and 10 mass% or less are more preferable, and 0.5 mass% or more and 5 mass% or less are more. preferable.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (ii.2.10) is determined in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. 0.5 mass% or more and 15 mass% or less are more preferable with respect to the total mass of a liquid crystal composition, 0.5 mass% or more and 10 mass% or less are more preferable, and 0.5 mass% or more and 5 mass% or less are more. preferable.

  In the liquid crystal composition in which the compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is only the compound represented by the formula (ii.2.2), the total mass of the liquid crystal composition The total content of the compound represented by the formula (i) and the compound represented by the formula (ii.2.2) is preferably 2 to 15% by mass, more preferably 3 to 13% by mass. -11 mass% is still more preferable.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is represented by the compound represented by the formula (ii.2.2) and the formula (ii.2.10). In the liquid crystal composition comprising only the compound, the compound represented by the formula (i), the compound represented by the formula (ii.2.2), and the formula (ii.2. 10-18 mass% is preferable, as for total content of the compound represented by 10), 10-17 mass% is more preferable, and 13-16 mass% is still more preferable.

  In a liquid crystal composition containing 1 to 3 compounds as the compound represented by the general formula (ii), the compound represented by the formula (i) and the general formula (ii) with respect to the total mass of the liquid crystal composition ) Is preferably 5 to 45% by mass, and more preferably 5 to 40% by mass. Among these, when there are three types of compounds represented by the general formula (ii) contained in the liquid crystal composition, the compound represented by the formula (i) with respect to the total mass of the liquid crystal composition; The total content of the compound represented by the general formula (ii) is preferably 5% by mass or more and less than 19% by mass, more preferably 10% by mass or more and 18% by mass or less, and more preferably 13% by mass or more and 16% by mass or less. Further preferred. When there are two types of compounds represented by the general formula (ii) contained in the liquid crystal composition, the compound represented by the formula (i) and the general formula (ii) with respect to the total mass of the liquid crystal composition ) Is preferably 8% by mass or more and 45% by mass or less, more preferably 10% by mass or more and 42% by mass or less, and still more preferably 13% by mass or more and 39% by mass or less. When the compound represented by the general formula (ii) contained in the liquid crystal composition is one kind, the compound represented by the formula (i) and the general formula (ii) with respect to the total mass of the liquid crystal composition ) Is preferably 5% by mass or more and 20% by mass or less, more preferably 5% by mass or more and 15% by mass or less, and still more preferably 5% by mass or more and less than 6% by mass.

  The liquid crystal composition of the present invention can further contain at least one compound represented by the general formula (L).

In the general formula (L), R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent at least two —CH _{2 in the} alkyl group. Each — may be independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.
OL represents 0, 1, 2 or 3.
B ^L1 , B ^L2 and B ^L3 are each independently
(A) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or at least two —CH ₂ — not adjacent to each other may be replaced by —O—), and ,
(B) a 1,4-phenylene group (one —CH═ present in this group or at least two non-adjacent —CH═ may be replaced by —N═),
Represents a group selected from the group consisting of At least one hydrogen atom in the groups (a) and (b) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom.
L ^L1 and L ^L2 each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, — OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C— are represented.
When OL is 2 or 3, and a plurality of L ^L2 are present, they may be the same or different.
When OL is 2 or 3, and there are a plurality of ^BL3 , they may be the same or different.
However, the compound represented by the general formula (ii) is excluded.

  There are no particular restrictions on the types of compounds that can be combined, but they can be combined as appropriate according to the desired performance such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence (refractive index anisotropy). use. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In another embodiment of the present invention, there are three types. Furthermore, in another embodiment of this invention, they are four types. Furthermore, in another embodiment of the present invention, there are five types. Furthermore, in another embodiment of the present invention, there are six types. Furthermore, in another embodiment of the present invention, there are seven types. Furthermore, in another embodiment of this invention, they are eight types. Furthermore, in another embodiment of the present invention, there are nine types. Furthermore, in another embodiment of this invention, it is ten or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (L) is low temperature solubility, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, It is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

  The content of the compound represented by the general formula (L) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 10 to 90% by mass in one embodiment of the present invention. In still another embodiment of the present invention, the content is 15% to 85% by mass. Furthermore, in another embodiment of this invention, the said content is 20-80 mass%. Furthermore, in another embodiment of this invention, the said content is 24-80 mass%. Furthermore, in another embodiment of this invention, the said content is 27-80 mass%. Furthermore, in another embodiment of this invention, the said content is 33-80 mass%. Furthermore, in another embodiment of this invention, the said content is 42-80 mass%. Furthermore, in another embodiment of this invention, the said content is 55-80 mass%. Furthermore, in another embodiment of this invention, the said content is 59-80 mass%. Furthermore, in another embodiment of this invention, the said content is 61-80 mass%. Furthermore, in another embodiment of this invention, the said content is 63-80 mass%. Furthermore, in another embodiment of this invention, the said content is 66-80 mass%. Furthermore, in another embodiment of this invention, the said content is 70-80 mass%. Furthermore, in another embodiment of this invention, the said content is 74-80 mass%. Furthermore, in another embodiment of this invention, the said content is 78-80 mass%. Furthermore, in another embodiment of this invention, the said content is 25-74 mass%. Furthermore, in another embodiment of this invention, the said content is 25-70 mass%. Furthermore, in another embodiment of this invention, the said content is 25-64 mass%. In still another embodiment of the present invention, the content is 25% to 63% by mass. Furthermore, in another embodiment of this invention, the said content is 25-59 mass%. Furthermore, in another embodiment of this invention, the said content is 25-56 mass%. Furthermore, in another embodiment of this invention, the said content is 25-55 mass%. Furthermore, in another embodiment of this invention, the said content is 25-52 mass%. In still another embodiment of the present invention, the content is 25% to 33% by mass. In still another embodiment of the present invention, the content is 33% to 64% by mass. In still another embodiment of the present invention, the content is 42% to 52% by mass. Furthermore, in another embodiment of this invention, the said content is 55-63 mass%. Furthermore, in another embodiment of this invention, the said content is 60-50 mass%. Furthermore, in another embodiment of this invention, the said content is 66-74 mass%. Furthermore, in another embodiment of this invention, the said content is 67-70 mass%. Furthermore, in another embodiment of this invention, the said content is 78-79 mass%.

  When the liquid crystal composition of the present invention has a low viscosity and a liquid crystal composition having a high response speed is required, the above lower limit value is preferably high and the upper limit value is preferably high. Furthermore, when the liquid crystal composition of the present invention maintains a high Tni and a liquid crystal composition with good temperature stability is required, the above lower limit value is preferably high and the upper limit value is high. When it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the lower limit value is low and the upper limit value is low.

R ^L1 and R ^L2 are a linear alkyl group having 1 to 5 carbon atoms or a linear alkyl group having 1 to 4 carbon atoms when the ring structure to which R ^L1 is bonded is a phenyl group (aromatic). (Or more) alkoxy groups or alkenyl groups having 4 to 5 carbon atoms are preferred, and when the ring structure to which they are bonded is a saturated ring structure such as cyclohexane, pyran, or dioxane, A C1-C5 alkyl group, a linear C1-C4 (or more) alkoxy group, or a linear C2-C5 alkenyl group is preferable.

The compound represented by the general formula (L) preferably has no chlorine atom in the molecule when chemical stability of the liquid crystal composition is required.
The compound represented by general formula (L) is preferably, for example, a compound selected from the group of compounds represented by general formula (I).

In the general formula (I), R ¹¹ and R ¹² are each independently an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or an alkenyl group having 2 to 5 carbon atoms. A ¹¹ and A ¹² are each independently 1,4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group or 3-fluoro-1,4-phenylene. Represents a group.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In another embodiment of the present invention, there are three types. Furthermore, in another embodiment of this invention, they are four types. Furthermore, in another embodiment of the present invention, there are five types. Furthermore, in another embodiment of this invention, they are six or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I) includes solubility at a low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, It is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

  The content of the compound represented by the general formula (I) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 10 to 75% by mass in one embodiment of the present invention. Or in another embodiment of this invention, the said content is 10-70 mass%. In still another embodiment of the present invention, the content is 10% to 65% by mass. Furthermore, in another embodiment of this invention, the said content is 10-60 mass%. In still another embodiment of the present invention, the content is 10% to 55% by mass. In still another embodiment of the present invention, the content is 10% to 52% by mass. In still another embodiment of the present invention, the content is 10% to 49% by mass. In still another embodiment of the present invention, the content is 10% to 44% by mass. In still another embodiment of the present invention, the content is 10% to 38% by mass. Furthermore, in another embodiment of this invention, the said content is 10-20 mass%. Furthermore, in another embodiment of this invention, the said content is 16-70 mass%. Furthermore, in another embodiment of this invention, the said content is 20-70 mass%. Furthermore, in another embodiment of this invention, the said content is 38-70 mass%. Furthermore, in another embodiment of this invention, the said content is 41-70 mass%. Furthermore, in another embodiment of this invention, the said content is 42-70 mass%. Furthermore, in another embodiment of this invention, the said content is 48-70 mass%. Furthermore, in another embodiment of this invention, the said content is 52-70 mass%. Furthermore, in another embodiment of this invention, the said content is 55-70 mass%. Furthermore, in another embodiment of this invention, the said content is 16-46 mass%. Furthermore, in another embodiment of this invention, the said content is 38-46 mass%. Furthermore, in another embodiment of this invention, the said content is 41-45 mass%. In still another embodiment of the present invention, the content is 42% to 43% by mass. In still another embodiment of the present invention, the content is 48% to 49% by mass.

  When the liquid crystal composition of the present invention has a low viscosity and a liquid crystal composition having a high response speed is required, the above lower limit value is preferably high and the upper limit value is preferably high. Furthermore, when the liquid crystal composition of the present invention maintains a high Tni and a liquid crystal composition with good temperature stability is required, it is preferable that the above lower limit value is medium and the upper limit value is medium. When it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the lower limit value is low and the upper limit value is low.

R ¹¹ and R ¹² are each a linear alkyl group having 1 to 5 carbon atoms or a linear alkyl group having 1 to 4 carbon atoms when the ring structure to which R ¹¹ and R ¹² are bonded is a phenyl group (aromatic). Or an alkenyl group having 4 to 5 carbon atoms is preferred, and when the ring structure to which it is bonded is a saturated ring structure such as cyclohexane, pyran or dioxane, it is a linear 1 to 5 carbon atom Are preferably a linear alkyl group having 1 to 4 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms.

  The compound represented by the general formula (I) is preferably at least one compound selected from the compound group represented by the general formula (I-1).

In the general formula (I-1), R ¹¹ and R ¹² are each independently an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or an alkenyl having 2 to 5 carbon atoms. Represents a group.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In another embodiment of the present invention, there are three types. Furthermore, in another embodiment of this invention, they are four types. Furthermore, in another embodiment of this invention, they are five or more types.

  In the liquid crystal composition of the present invention, when the compound represented by the general formula (I-1) is blended, the content of the compound includes solubility at low temperature, transition temperature, electrical reliability, birefringence. It is necessary to adjust appropriately according to performance required, such as a rate, process compatibility, dripping trace, image sticking, and dielectric anisotropy.

  The content of the compound represented by the general formula (I-1) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 70% by mass in one embodiment of the present invention. Or in another embodiment of this invention, the said content is 1-65 mass%. In still another embodiment of the present invention, the content is 1% to 60% by mass. Furthermore, in another embodiment of this invention, the said content is 1-56 mass%. In still another embodiment of the present invention, the content is 1% to 52% by mass. In still another embodiment of the present invention, the content is 1% to 49% by mass. In still another embodiment of the present invention, the content is 1% to 48% by mass. Furthermore, in another embodiment of this invention, the said content is 1-45 mass%. Furthermore, in another embodiment of this invention, the said content is 1-40 mass%. In still another embodiment of the present invention, the content is 1% to 38.5% by mass. Furthermore, in another embodiment of this invention, the said content is 1-36 mass%. In still another embodiment of the present invention, the content is 1% to 29% by mass. Furthermore, in another embodiment of this invention, the said content is 1-20 mass%. Furthermore, in another embodiment of this invention, the said content is 1-16 mass%. Furthermore, in another embodiment of this invention, the said content is 5-70 mass%. Furthermore, in another embodiment of this invention, the said content is 16-70 mass%. Furthermore, in another embodiment of this invention, the said content is 20-70 mass%. Furthermore, in another embodiment of this invention, the said content is 29-70 mass%. Furthermore, in another embodiment of this invention, the said content is 37-70 mass%. Furthermore, in another embodiment of this invention, the said content is 38-70 mass%. In still another embodiment of the present invention, the content is 42% to 70% by mass. In still another embodiment of the present invention, the content is 48% to 70% by mass. In still another embodiment of the present invention, the content is 49% to 70% by mass. In still another embodiment of the present invention, the content is 52% to 70% by mass. In still another embodiment of the present invention, the content is 55% to 70% by mass. In still another embodiment of the present invention, the content is 5% to 36% by mass. In still another embodiment of the present invention, the content is 16% to 45% by mass. In still another embodiment of the present invention, the content is 37% to 38.5% by mass. In still another embodiment of the present invention, the content is 38% to 40% by mass. In still another embodiment of the present invention, the content is 42% to 48% by mass. In still another embodiment of the present invention, the content is 42% to 45% by mass. In still another embodiment of the present invention, the content is 48% to 49% by mass. In still another embodiment of the present invention, the content is 52% to 55% by mass.

  When the liquid crystal composition of the present invention has a low viscosity and a liquid crystal composition having a high response speed is required, the above lower limit value is preferably high and the upper limit value is preferably high. Furthermore, when the liquid crystal composition of the present invention maintains a high Tni and a liquid crystal composition with good temperature stability is required, it is preferable that the above lower limit value is medium and the upper limit value is medium. When it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the lower limit value is low and the upper limit value is low.

  Alternatively / further, the compound represented by the general formula (I-1) is preferably at least one compound selected from the group of compounds represented by the general formula (I-1-1).

In the general formula (I-1-1), R ¹² represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 5 carbon atoms.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-1-1) includes solubility at a low temperature, transition temperature, electrical reliability, birefringence, and process suitability. In addition, it is necessary to appropriately adjust according to required performance such as dripping marks, image sticking, and dielectric anisotropy.

  The content of the compound represented by the general formula (I-1-1) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 30% by mass as one embodiment of the present invention. . Or in another embodiment of this invention, the said content is 1-25 mass%. In still another embodiment of the present invention, the content is 1% to 20% by mass. Furthermore, in another embodiment of this invention, the said content is 1-16 mass%. Furthermore, in another embodiment of this invention, the said content is 1-11 mass%. Furthermore, in another embodiment of this invention, the said content is 1-8 mass%. Furthermore, in another embodiment of this invention, the said content is 1-5 mass%. Furthermore, in another embodiment of this invention, the said content is 4-25 mass%. Furthermore, in another embodiment of this invention, the said content is 6-25 mass%. Furthermore, in another embodiment of this invention, the said content is 8-25 mass%. Furthermore, in another embodiment of this invention, the said content is 11-25 mass%. Furthermore, in another embodiment of this invention, the said content is 4-10 mass%. Furthermore, in another embodiment of this invention, the said content is 4-7 mass%. Furthermore, in another embodiment of this invention, the said content is 6-16 mass%. Furthermore, in another embodiment of this invention, the said content is 6-11 mass%. Furthermore, in another embodiment of this invention, the said content is 6-9 mass%. Furthermore, in another embodiment of this invention, the said content is 6-7 mass%. Furthermore, in another embodiment of this invention, the said content is 5-8 mass%. Furthermore, in another embodiment of this invention, the said content is 8-13 mass%. Furthermore, in another embodiment of this invention, the said content is 11-16 mass%. Furthermore, in another embodiment of this invention, the said content is 11-15 mass%. Furthermore, in another embodiment of this invention, the said content is 12-14 mass%.

  Furthermore, the compound represented by the general formula (I-1-1) is preferably a compound selected from the group of compounds represented by formula (1.1) to formula (1.3). 1.2) or a compound represented by formula (1.3) is preferred, and a compound represented by formula (1.3) is particularly preferred.

  When the compound represented by formula (1.2) or formula (1.3) is used alone, the content of the compound represented by formula (1.2) is high. The content of the compound represented by the formula (1.3) has the effect of improvement, and the range shown below is preferable because a liquid crystal composition having high response speed and high electrical and optical reliability can be obtained.

  Content of the compound represented by Formula (1.3) is 1-30 mass% as one embodiment of this invention with respect to the gross mass of the liquid-crystal composition of this invention, for example. Or in another embodiment of this invention, the said content is 1-25 mass%. Or in another embodiment of this invention, the said content is 1-20 mass%. Or in another embodiment of this invention, the said content is 1-16 mass%. Or in another embodiment of this invention, the said content is 1-14 mass%. Or in another embodiment of this invention, the said content is 1-11 mass%. Or in another embodiment of this invention, the said content is 1-8 mass%. Or in another embodiment of this invention, the said content is 1-5 mass%. Or in another embodiment of this invention, the said content is 4-10 mass%. Or in another embodiment of this invention, the said content is 4-7 mass%. Or in another embodiment of this invention, the said content is 6-16 mass%. Or in another embodiment of this invention, the said content is 6-11 mass%. Or in another embodiment of this invention, the said content is 6-9 mass%. Or in another embodiment of this invention, the said content is 6-7 mass%. Or in another embodiment of this invention, the said content is 8-13 mass%. Or in another embodiment of this invention, the said content is 11-16 mass%. Or in another embodiment of this invention, the said content is 11-15 mass%. Or in another embodiment of this invention, the said content is 12-14 mass%.

  Alternatively / further, the compound represented by the general formula (I-1) is preferably at least one compound selected from the group of compounds represented by the general formula (I-1-2).

In the general formula (I-1-2), R ¹² represents an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or an alkenyl group having 2 to 5 carbon atoms.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In another embodiment of the present invention, there are three types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-1-2) is low temperature solubility, transition temperature, electrical reliability, birefringence, process suitability, It is necessary to adjust appropriately according to required performance such as dripping marks, image sticking, and dielectric anisotropy.

  The content of the compound represented by the general formula (I-1-2) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 65% by mass in one embodiment of the present invention. . Or in another embodiment of this invention, the said content is 1-60 mass%. In still another embodiment of the present invention, the content is 1% to 56% by mass. In still another embodiment of the present invention, the content is 1% to 49% by mass. In still another embodiment of the present invention, the content is 1% to 47% by mass. In still another embodiment of the present invention, the content is 1% to 43% by mass. Furthermore, in another embodiment of this invention, the said content is 1-41 mass%. Furthermore, in another embodiment of this invention, the said content is 1-36 mass%. Furthermore, in another embodiment of this invention, the said content is 1-30 mass%. Furthermore, in another embodiment of this invention, the said content is 1-27 mass%. In still another embodiment of the present invention, the content is 1% to 22% by mass. Furthermore, in another embodiment of this invention, the said content is 1-16 mass%. Furthermore, in another embodiment of this invention, the said content is 10-60 mass%. Furthermore, in another embodiment of this invention, the said content is 15-60 mass%. Furthermore, in another embodiment of this invention, the said content is 22-60 mass%. Furthermore, in another embodiment of this invention, the said content is 27-60 mass%. Furthermore, in another embodiment of this invention, the said content is 34-60 mass%. Furthermore, in another embodiment of this invention, the said content is 37-60 mass%. Furthermore, in another embodiment of this invention, the said content is 41-60 mass%. Furthermore, in another embodiment of this invention, the said content is 43-60 mass%. Furthermore, in another embodiment of this invention, the said content is 47-60 mass%. Furthermore, in another embodiment of this invention, the said content is 49-60 mass%. Furthermore, in another embodiment of this invention, the said content is 10-56 mass%. In still another embodiment of the present invention, the content is 10% to 44% by mass. Furthermore, in another embodiment of this invention, the said content is 12-30 mass%. Furthermore, in another embodiment of this invention, the said content is 13-16 mass%. Furthermore, in another embodiment of this invention, the said content is 22-29 mass%. Furthermore, in another embodiment of this invention, the said content is 22-27.5 mass%. Furthermore, in another embodiment of this invention, the said content is 27-30 mass%. In still another embodiment of the present invention, the content is 34% to 44% by mass. Furthermore, in another embodiment of this invention, the said content is 34-36 mass%. Furthermore, in another embodiment of this invention, the said content is 37-41 mass%. In still another embodiment of the present invention, the content is 40% to 43% by mass. In still another embodiment of the present invention, the content is 42% to 48% by mass. In still another embodiment of the present invention, the content is 44% to 49% by mass. Furthermore, in another embodiment of this invention, the said content is 49-56 mass%.

  Furthermore, the compound represented by the general formula (I-1-2) is preferably a compound selected from the group of compounds represented by the formula (2.1) to the formula (2.4). .2) to the compound represented by formula (2.4). In particular, the compound represented by the formula (2.2) is preferable because the response speed of the liquid crystal composition of the present invention is particularly improved. Moreover, when calculating | requiring Tni higher than a response speed, it is preferable to use the compound represented by Formula (2.3) or Formula (2.4). The content of the compounds represented by formula (2.3) and formula (2.4) is not preferably 30% by mass or more in order to improve the solubility at low temperatures.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (2.2) is preferably 1% by mass or more and 65% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. It is preferably 1% by mass or more and 60% by mass or less, and more preferably 10% by mass or more and 60% by mass or less. Among these, when the liquid crystal composition of the present invention contains two or three kinds of compounds represented by the general formula (ii), the formula (2.2) relative to the total mass of the liquid crystal composition. The content of the compound represented by is preferably at least 47% by mass, more preferably 47% by mass or more and 53% by mass or less, and more preferably 47% by mass or more and 50% by mass or less.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (2.3) is preferably 1% by mass or more and 30% by mass or less based on the total mass of the liquid crystal composition of the present invention. 5 mass% to 30 mass% is preferable, 10 mass% to 30 mass% is preferable, and 10 mass% to 15 mass% is preferable.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (2.4) is preferably 1% by mass or more and 30% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. It is more preferably 1% by mass or less and 25% by mass or less, preferably 1% by mass or more and 20% by mass or less, preferably 1% by mass or more and 15% by mass or less, and preferably 5% by mass or more and 15% by mass or less. It is preferable that it is 10 mass% or more and 15 mass% or less.

  The liquid crystal composition of the present invention may further contain a compound represented by the formula (2.5) having a structure similar to that of the compound represented by the general formula (I-1-2).

  It is preferable to adjust the content of the compound represented by the formula (2.5) according to required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Is preferably 15 to 35% by mass, more preferably 18 to 30% by mass, and still more preferably 22 to 33% by mass, based on the total mass of the liquid crystal composition of the present invention. The content is particularly preferably 25 to 30% by mass.

  In the liquid crystal composition containing at least two types of compounds as the compound represented by the general formula (ii) and further including the formula (2.5), the compound represented by the formula (i) and the general formula ( The total content of the compound represented by ii) and the compound represented by the formula (2.5) is preferably 50 to 75% by mass, more preferably 55 to 70% by mass, 58 It is still more preferable that it is -67 mass%.

  Alternatively / further, the compound represented by the general formula (I) is preferably at least one compound selected from the group of compounds represented by the general formula (I-2).

In the general formula (I-2), R ¹³ and R ¹⁴ each independently represents an alkyl group having 1 to 5 carbon atoms.
Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In another embodiment of the present invention, there are three types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-2) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dropping. It is necessary to adjust appropriately according to the required performance such as marks, image sticking, and dielectric anisotropy.

  The content of the compound represented by the general formula (I-2) is preferably 3 to 50% by mass, and preferably 15 to 45% by mass with respect to the total mass of the liquid crystal composition of the present invention. Is more preferable, it is still more preferable that it is 30-43 mass%, and it is especially preferable that it is 35-40 mass%.

  Furthermore, the compound represented by the general formula (I-2) is preferably at least one compound selected from the group of compounds represented by formula (3.1) to formula (3.4), A compound represented by formula (3.1), formula (3.3) and / or formula (3.4) is preferable. In particular, the compound represented by the formula (3.1) is preferable because the response speed of the liquid crystal composition of the present invention is particularly improved. Moreover, when calculating | requiring Tni higher than a response speed, it is preferable to use the compound represented by Formula (3.3) and / or Formula (3.4). The content of the compounds represented by the formulas (3.3) and (3.4) is not preferably 20% by mass or more in order to improve the solubility at low temperatures.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (3.1) is preferably at least 6% by mass with respect to the total mass of the liquid crystal composition of the present invention, and 6% by mass. % To 40% by mass, more preferably 10% to 35% by mass, still more preferably 15% to 30% by mass, and even more preferably 20% to 25%. It is particularly preferable that the content is not more than mass%.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (3.3) is 3% by mass or more and 25% by mass or more with respect to the total mass of the liquid crystal composition of the present invention. Preferably, it is 6 mass% or more and 20 mass% or less, More preferably, it is 10 mass% or more and 15 mass% or less. Among these, the preferable lower limit of the content of the compound represented by the formula (3.3) is 6% by mass with respect to the total mass of the liquid crystal composition of the present invention.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (3.4) is preferably at least 3% by mass with respect to the total mass of the liquid crystal composition of the present invention, preferably 3% The content is more preferably 15% by mass or less, still more preferably 3% by mass or more and 10% by mass or less, and particularly preferably 3% by mass or more and 5% by mass or less.

  In the liquid crystal composition containing only one kind of compound represented by the formula (ii.2) as the compound represented by the general formula (ii), the compound represented by the general formula (I-2) And a compound represented by the formula (3.3) are preferably included. The total of the compound represented by the formula (i), the compound represented by the general formula (ii), and the compound represented by the formula (3.3) with respect to the total mass of the liquid crystal composition. The content is preferably 3 to 27% by mass, more preferably 7 to 22% by mass, and still more preferably 12 to 17% by mass.

  In the liquid crystal composition containing only one kind of compound represented by the formula (ii.1) as the compound represented by the general formula (ii), the compound represented by the general formula (I-2) The compound represented by formula (3.1), the compound represented by formula (3.3), and the compound represented by formula (3.4) are preferably included. With respect to the total mass of the liquid crystal composition, the compound represented by the formula (i), the compound represented by the general formula (ii), the compound represented by the formula (3.1), the formula (3. The total content of the compound represented by 3) and the compound represented by the formula (3.4) is preferably 32-58 mass%, more preferably 37-53 mass%. 42 to 48% by mass is even more preferable.

  Alternatively / further, the compound represented by the general formula (I) is preferably at least one compound selected from the group of compounds represented by the general formula (I-3).

In the general formula (I-3), R ¹³ represents an alkyl group having 1 to 5 carbon atoms, and R ¹⁵ represents an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In another embodiment of the present invention, there are three types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-3) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dropping. It is necessary to adjust appropriately according to the required performance such as marks, image sticking, and dielectric anisotropy.

  The content of the compound represented by the general formula (I-3) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 3 to 30% by mass in one embodiment of the present invention. Or in another embodiment of this invention, the said content is 4-30 mass%. In still another embodiment of the present invention, the content is 15% to 30% by mass. Furthermore, in another embodiment of this invention, the said content is 25-30 mass%. In still another embodiment of the present invention, the content is 3% to 25% by mass. Furthermore, in another embodiment of this invention, the said content is 3-20 mass%. Furthermore, in another embodiment of this invention, the said content is 3-15 mass%. Furthermore, in another embodiment of this invention, the said content is 3-5 mass%.

  When emphasizing solubility at low temperatures, the effect is high when the content is set to be large. On the other hand, when the response speed is important, the effect is high when the content is set low. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

  Further, the compound represented by the general formula (I-3) is preferably at least one compound selected from the group of compounds represented by the formula (4.1) to the formula (4.3), It is preferable that it is a compound represented by Formula (4.3).

  The content of the compound represented by the formula (4.3) is preferably 2% by mass or more and 30% by mass or less, and preferably 4% by mass or more and 30% by mass with respect to the total mass of the liquid crystal composition of the present invention. % Or less, preferably 6% by mass or more and 30% by mass or less, preferably 8% by mass or more and 30% by mass or less, and preferably 10% by mass or more and 30% by mass or less, It is preferably 12% by mass to 30% by mass, preferably 14% by mass to 30% by mass, more preferably 16% by mass to 30% by mass, and 18% by mass to 25% by mass. It is preferable that it is 20 mass% or more and 24 mass% or less, and it is especially preferable that it is 22 mass% or more and 23 mass% or less.

  Alternatively / further, the compound represented by the general formula (I) is preferably at least one compound selected from the group of compounds represented by the general formula (I-4).

In the general formula (I-4), R ¹¹ and R ¹² are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy having 1 to 4 carbon atoms. Represents a group.

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-4) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dropping. It is necessary to adjust appropriately according to the required performance such as marks, image sticking, and dielectric anisotropy.

  The content of the compound represented by the general formula (I-4) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 20% by mass in one embodiment of the present invention. Or in another embodiment of this invention, the said content is 1-15 mass%. Moreover, in another embodiment of this invention, the said content is 1-10 mass%. Furthermore, in another embodiment of this invention, the said content is 3-8 mass%. Furthermore, in another embodiment of this invention, the said content is 5-8 mass%. Furthermore, in another embodiment of this invention, the said content is 6-8 mass%.

  When a high birefringence is obtained, the effect is high when the content is set to be large. On the other hand, when high Tni is emphasized, the effect is high when the content is set low. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

  Further, the compound represented by the general formula (I-4) is preferably at least one compound selected from the group of compounds represented by the formulas (5.1) to (5.4). It is preferably at least one compound selected from the group of compounds represented by formula (5.2) to formula (5.4).

  The content of the compound represented by the formula (5.4) is preferably 1% by mass or more and 10% by mass or less, and preferably 3% by mass or more and 8% by mass with respect to the total mass of the liquid crystal composition of the present invention. It is preferably 5% by mass or more and 8% by mass or less, and more preferably 6% by mass or more and 8% by mass or less.

  Alternatively / further, the compound represented by the general formula (I) is preferably at least one compound selected from the group of compounds represented by the general formula (I-5).

In the general formula (I-5), R ¹¹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and R ¹² represents a carbon atom. An alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms is represented.

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-5) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dropping. It is necessary to adjust appropriately according to the required performance such as marks, image sticking, and dielectric anisotropy.

  The content of the compound represented by the general formula (I-5) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 25% by mass in one embodiment of the present invention. Or in another embodiment of this invention, the said content is 1-20 mass%. In still another embodiment of the present invention, the content is 1% to 15% by mass. Furthermore, in another embodiment of this invention, the said content is 1-11 mass%. Furthermore, in another embodiment of this invention, the said content is 1-5 mass%. Furthermore, in another embodiment of this invention, the said content is 2-15 mass%. Furthermore, in another embodiment of this invention, the said content is 5-15 mass%. Furthermore, in another embodiment of this invention, the said content is 8-15 mass%. Furthermore, in another embodiment of this invention, the said content is 2-5 mass%. Furthermore, in another embodiment of this invention, the said content is 8-11 mass%.

  When emphasizing solubility at low temperatures, the effect is high when the content is set to be large. On the other hand, when the response speed is important, the effect is high when the content is set low. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

  Further, the compound represented by the general formula (I-5) is preferably at least one compound selected from the group of compounds represented by formula (6.1) to formula (6.6), A compound represented by Formula (6.3), Formula (6.4), and / or Formula (6.6) is preferable.

  For example, the content of the compound represented by the formula (6.3) is preferably 8% by mass or more and 14% by mass or less, and 9% by mass or more with respect to the total mass of the liquid crystal composition of the present invention. It is more preferably 13% by mass or less, and still more preferably 10% by mass or more and 12% by mass or less.

  For example, the content of the compound represented by the formula (6.6) is preferably 1% by mass or more and 15% by mass or less with respect to the total mass of the liquid crystal composition of the present invention, and is preferably 1% by mass or more and 10% by mass. More preferably, it is 2 mass% or more, 8 mass% or less is still more preferable, and 3 mass% or more and 7 mass% or less is especially preferable.

  As the compound represented by the general formula (ii), only one kind of compound is included as the compound represented by the general formula (ii), and the compound represented by the general formula (I-5) In the liquid crystal composition containing the compound represented by the formula (6.6), the compound represented by the formula (i) and the compound represented by the general formula (ii) with respect to the total mass of the liquid crystal composition The total content of the compound represented by the formula (6.6) is preferably 3 to 29% by mass, more preferably 8 to 24% by mass, and 13 to 19% by mass. It is even more preferable.

  The liquid crystal composition of the present invention may further contain a compound represented by formula (6.7) and / or a compound represented by formula (6.8) as the compound represented by formula (I-5). it can.

  It is preferable to adjust the content of the compound represented by the formula (6.7) according to required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Is preferably 2 to 30% by mass, preferably 3 to 27% by mass, and preferably 5 to 25% by mass with respect to the total mass of the liquid crystal composition of the present invention. It is preferable to contain 7 mass% or more and 23 mass% or less.

  Alternatively / further, the compound represented by the general formula (I) is preferably at least one compound selected from the group of compounds represented by the general formula (I-6).

In the formula (I-6), R ¹¹ and R ¹² are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms. X ¹¹ and X ¹² each independently represent a fluorine atom or a hydrogen atom, and either X ¹¹ or X ¹² is a fluorine atom.

  The content of the compound represented by the general formula (I-6) is preferably 2% by mass or more and 30% by mass or less, and preferably 4% by mass or more and 30% by mass with respect to the total mass of the liquid crystal composition of the present invention. % Or less, preferably 5% by mass or more and 30% by mass or less, preferably 6% by mass or more and 30% by mass or less, and preferably 9% by mass or more and 30% by mass or less, It is preferably 12% by mass to 30% by mass, preferably 14% by mass to 30% by mass, more preferably 16% by mass to 30% by mass, and 18% by mass to 25% by mass. It is preferable that it is 20 mass% or more and 24 mass% or less, and it is preferable that it is 22 mass% or more and 23 mass% or less.

  Furthermore, the compound represented by the general formula (I-6) is preferably a compound represented by the formula (7.1).

  Alternatively / further, the compound represented by the general formula (I) is preferably a compound selected from the group of compounds represented by the general formula (I-7).

In the general formula (I-7), R ¹¹ and R ¹² are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy having 1 to 4 carbon atoms. Represents a group, and X ¹² represents a fluorine atom or a chlorine atom.

  The content of the compound represented by the general formula (I-7) is preferably 1% by mass or more and 20% by mass or less, and preferably 1% by mass or more and 15% by mass with respect to the total mass of the liquid crystal composition of the present invention. % Or less, preferably 1% by mass or more and 10% by mass or less, and more preferably 1% by mass or more and 5% by mass or less.

  Furthermore, the compound represented by the general formula (I-7) is preferably a compound represented by the formula (8.1).

  Alternatively / further, the compound represented by the general formula (I) is preferably at least one compound selected from the group of compounds represented by the general formula (I-8).

In the general formula (I-8), R ¹⁶ and R ¹⁷ each independently represent an alkenyl group having 2 to 5 carbon atoms.

  There are no particular restrictions on the types of compounds that can be combined, but one to three types can be combined depending on the required performance such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. preferable.

  The content of the compound represented by the general formula (I-8) is low temperature solubility, transition temperature, electrical reliability, birefringence, process suitability, drop mark, image sticking, anisotropic dielectric constant. Depending on the required performance such as properties, it is preferably 1 to 25% by mass, preferably 1 to 20% by mass, and 1 to 15% by mass with respect to the total mass of the liquid crystal composition of the present invention. It is preferable that it is 1-10 mass%, it is preferable that it is 4-9 mass%, and it is preferable that it is 4-6 mass%.

  Furthermore, the compound represented by the general formula (I-8) is preferably at least one compound selected from the group of compounds represented by formula (9.1) to formula (9.10), It is preferable that it is a compound represented by Formula (9.2), Formula (9.4), and / or Formula (9.7).

  Alternatively / further, the compound represented by the general formula (L) is preferably at least one compound selected from, for example, compounds represented by the general formula (II).

In the general formula (II), R ²¹ and R ²² each independently represent an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms. represents, ^{a 2} represents a 1,4-cyclohexylene group or 1,4-phenylene group, ^{Q 2} is a single _{bond, -COO -, - CH 2 -CH} 2 - or an _-CF 2 O-. However, the compound represented by the general formula (ii) is excluded.

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In still another embodiment of the present invention, there are three types. Furthermore, in another embodiment of this invention, they are four or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (II) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, It is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

  The content of the compound represented by the general formula (II) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 35% by mass as one embodiment of the present invention. Or in another embodiment of this invention, the said content is 1-30 mass%. In still another embodiment of the present invention, the content is 1% to 26% by mass. Furthermore, in another embodiment of this invention, the said content is 1-20 mass%. Furthermore, in another embodiment of this invention, the said content is 1-15 mass%. Furthermore, in another embodiment of this invention, the said content is 1-11 mass%. Furthermore, in another embodiment of this invention, the said content is 1-7 mass%. Furthermore, in another embodiment of this invention, the said content is 1-3 mass%. Furthermore, in another embodiment of this invention, the said content is 1.5-30 mass%. Furthermore, in another embodiment of this invention, the said content is 7-30 mass%. Furthermore, in another embodiment of this invention, the said content is 11-30 mass%. Furthermore, in another embodiment of this invention, the said content is 15-30 mass%. Furthermore, in another embodiment of this invention, the said content is 23-30 mass%. Furthermore, in another embodiment of this invention, the said content is 1.5-26 mass%. Furthermore, in another embodiment of this invention, the said content is 1.5-3 mass%. Furthermore, in another embodiment of this invention, the said content is 11-20 mass%. Furthermore, in another embodiment of this invention, the said content is 12-15 mass%. In still another embodiment of the present invention, the content is 23% to 26% by mass.

  Furthermore, the compound represented by the general formula (II) is preferably at least one compound selected from the group of compounds represented by the general formula (II-1), for example.

In the general formula (II-1), R ²¹ and R ²² are each independently an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms, or an alkoxy having 1 to 4 carbon atoms. Represents a group.

  The content of the compound represented by the general formula (II-1) is preferably adjusted according to required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, 4 mass% or more and 24 mass% or less are preferable, it is preferable that they are 8 mass% or more and 18 mass% or less, and it is still more preferable that they are 12 mass% or more and 14 mass% or less.

  Furthermore, it is preferable that the compound represented by general formula (II-1) is a compound represented, for example by Formula (10.1) and / or Formula (10.2).

  Alternatively / further, the compound represented by the general formula (II) is preferably at least one compound selected from the group of compounds represented by the general formula (II-2), for example.

In the general formula (II-2), R ²³ represents an alkenyl group having 2 to 5 carbon atoms, and R ²⁴ represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, it is two or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (II-2) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dropping. It is necessary to adjust appropriately according to the required performance such as marks, image sticking, and dielectric anisotropy.

  The content of the compound represented by the general formula (II-2) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 30% by mass in one embodiment of the present invention. Or in another embodiment of this invention, the said content is 1-26 mass%. In still another embodiment of the present invention, the content is 1% to 20% by mass. Furthermore, in another embodiment of this invention, the said content is 1-15 mass%. Furthermore, in another embodiment of this invention, the said content is 1-11 mass%. Furthermore, in another embodiment of this invention, the said content is 1-7 mass%. Furthermore, in another embodiment of this invention, the said content is 1-3 mass%. Furthermore, in another embodiment of this invention, the said content is 1.5-30 mass%. Furthermore, in another embodiment of this invention, the said content is 7-30 mass%. Furthermore, in another embodiment of this invention, the said content is 11-30 mass%. Furthermore, in another embodiment of this invention, the said content is 15-30 mass%. Furthermore, in another embodiment of this invention, the said content is 23-30 mass%. Furthermore, in another embodiment of this invention, the said content is 1.5-26 mass%. Furthermore, in another embodiment of this invention, the said content is 1.5-3 mass%. Furthermore, in another embodiment of this invention, the said content is 11-20 mass%. Furthermore, in another embodiment of this invention, the said content is 12-15 mass%. In still another embodiment of the present invention, the content is 23% to 26% by mass.

  Furthermore, the compound represented by the general formula (II-2) is preferably at least one compound selected from the group of compounds represented by formula (11.1) to formula (11.3), for example. .

  Depending on the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like, even if the compound represented by formula (11.1) is contained, ) Or a compound represented by the formula (11.1) and a compound represented by the formula (11.2), or a compound represented by the formula ( All compounds represented by formula (11.1) to formula (11.3) may be included.

  The content of the compound represented by the formula (11.1) is preferably 1 to 30% by mass and more preferably 1 to 25% by mass with respect to the total mass of the liquid crystal composition of the present invention. The content is more preferably 1 to 20% by mass, and particularly preferably 5 to 20% by mass.

  The content of the compound represented by the formula (11.2) is preferably at least 13% by mass, and 13 to 25% by mass with respect to the total mass of the liquid crystal composition of the present invention. Is more preferable, and it is still more preferable that it is 15-20 mass%.

  When both the compound represented by the formula (11.1) and the compound represented by the formula (11.2) are contained, the total mass of both compounds is the total mass of the liquid crystal composition of the present invention. The content is preferably 23% by mass or more and 35% by mass or less, more preferably 24% by mass or more and 33% by mass or less, and still more preferably 25% by mass or more and 30% by mass or less.

  In the liquid crystal composition containing only one kind of compound as the compound represented by the general formula (ii), the compound represented by the general formula (II-2) is represented by the formula (11.1). In a liquid crystal composition containing the compound and the compound represented by the formula (11.2), the compound represented by the formula (i) and the general formula (ii) with respect to the total mass of the liquid crystal composition. The total content of the compound represented by formula (11.1) and the compound represented by formula (11.2) is preferably 23 to 50% by mass, More preferably, it is 45 mass%, and it is still more preferable that it is 33-40 mass%.

  When the compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is one or two kinds, the compound represented by the formula (i) with respect to the total mass of the liquid crystal composition, The total content of the compound represented by the general formula (ii) and the compound represented by the general formula (II-2) is preferably 15 to 60% by mass, more preferably 18 to 57% by mass, and 21 to 21%. 54 mass% is still more preferable.

  Alternatively / further, the compound represented by the general formula (II) is preferably at least one compound selected from the group of compounds represented by the general formula (II-3), for example.

In the general formula (II-3), R ²⁵ represents an alkyl group having 1 to 5 carbon atoms, and R ²⁴ represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular restrictions on the types of compounds that can be combined, but depending on the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence, 1 to 3 of these compounds can be used. It is preferable to contain types.

The content of the compound represented by the general formula (II-3) is low temperature solubility, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, dielectric constant anisotropic It is necessary to adjust appropriately according to the required performance such as property.
The preferable content of the compound represented by the general formula (II-3) is, for example, 2 to 45% by mass with respect to the total mass of the liquid crystal composition of the present invention. Among these, for example, 5-45 mass%, 8-45 mass%, 11-45 mass%, 14-45 mass%, 17-45 mass%, 20-45 mass%, 23-45 mass%, 26- 45 mass%, 29-45 mass%, or 2-45 mass%, 2-40 mass%, 2-35 mass%, 2-30 mass%, 2-25 mass%, 2-20 mass%, 2-15 The mass% is preferably 2 to 10 mass%.

  Furthermore, the compound represented by the general formula (II-3) is preferably at least one compound selected from the group of compounds represented by formula (12.1) to formula (12.4), for example. .

  Depending on the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., even if the compound represented by formula (12.1) is contained, the formula (12.2) Or a compound represented by formula (12.1) and a compound represented by formula (12.2).

  The content of the compound represented by the formula (12.1) is preferably 3% by mass or more and 40% by mass or less, and preferably 5% by mass or more and 40% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. It is preferably 7 mass% or more and 40 mass% or less, preferably 9 mass% or more and 40 mass% or less, preferably 11 mass% or more and 40 mass% or less, and 12 mass%. % To 40% by mass, preferably 13% to 40% by mass, preferably 18% to 30% by mass, and 21% to 25% by mass. It is preferable.

  Further, the content of the compound represented by the formula (12.2) is preferably 3% by mass or more and 40% by mass or less with respect to the total mass of the liquid crystal composition of the present invention, and 5% by mass or more and 40% by mass. % Or less, preferably 8% to 40% by weight, preferably 10% to 40% by weight, preferably 12% to 40% by weight, It is preferably 15% by mass or more and 40% by mass or less, preferably 17% by mass or more and 30% by mass or less, and more preferably 19% by mass or more and 25% by mass or less.

  When both the compound represented by Formula (12.1) and the compound represented by Formula (12.2) are contained, the total mass of both compounds is with respect to the total mass of the liquid crystal composition of the present invention. It is preferably 15% by mass or more and 45% by mass or less, preferably 19% by mass or more and 45% by mass or less, more preferably 24% by mass or more and 40% by mass or less, and 30% by mass or more and 35% by mass or less. The following is preferable.

  The content of the compound represented by the formula (12.3) is preferably 0.05% by mass or more and 2% by mass or less with respect to the total mass of the liquid crystal composition of the present invention, and 0.1% by mass. % To 1% by mass, and preferably 0.2% to 0.5% by mass. The compound represented by the formula (12.3) may be an optically active compound.

  The content of the compound represented by the formula (12.4) is preferably 0.1% by mass or more and 2% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. It is more preferably from 1% by mass to 1% by mass, and further preferably from 0.2% by mass to 0.5% by mass.

  Furthermore, the compound represented by General Formula (II-3) is preferably at least one compound selected from the group of compounds represented by General Formula (II-3-1), for example.

In the general formula (II-3-1), R ²⁵ represents an alkyl group having 1 to 5 carbon atoms, and R ²⁶ represents an alkoxy group having 1 to 4 carbon atoms.

  There are no particular restrictions on the types of compounds that can be combined, but depending on the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence, 1 to 3 of these compounds can be used. It is preferable to contain types.

  The content of the compound represented by the general formula (II-3-1) can be adjusted according to required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. It is preferably 1% by mass or more and 24% by mass or less, preferably 4% by mass or more and 18% by mass or less, and more preferably 6% by mass or more and 14% by mass or less.

  Furthermore, the compound represented by general formula (II-3-1) is, for example, at least one compound selected from the group of compounds represented by formula (13.1) to formula (13.4). Particularly preferred is a compound represented by formula (13.3).

  Alternatively / further, the compound represented by the general formula (II) is preferably at least one compound selected from the group of compounds represented by the general formula (II-4), for example.

In the general formula (II-4), R ²¹ and R ²² are each independently an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 4 carbon atoms. Represents an alkoxy group.

  Of these compounds, only one kind or two or more kinds may be contained, but it is preferable to combine them appropriately according to the required performance. Although there is no restriction | limiting in particular in the kind of compound which can be combined, Depending on performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence, it is 1-2 from these compounds. It is preferable to contain a kind, and it is more preferred to contain 1-3 kinds.

  The content of the compound represented by the general formula (II-4) is preferably 1% by mass to 15% by mass with respect to the total mass of the liquid crystal composition of the present invention, and is preferably 2% by mass to 15% by mass. It is preferably 3% by mass or more and 15% by mass or less, preferably 4% by mass or more and 12% by mass or less, and more preferably 5% by mass or more and 7% by mass or less.

  Furthermore, the compound represented by the general formula (II-4) is preferably at least one compound selected from the group of compounds represented by the formula (14.1) to the formula (14.5), In particular, a compound represented by formula (14.2) and / or formula (14.5) is preferable.

  Alternatively / further, the compound represented by the general formula (L) is preferably at least one compound selected from the group of compounds represented by the general formula (III).

In the general formula (III), R ³¹ and R ³² are each independently an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms. Represents.

  The content of the compound represented by the general formula (III) is 1% by mass or more and 20% by mass or less with respect to the total mass of the liquid crystal composition of the present invention in consideration of required solubility and birefringence. It is preferable to contain 1 to 15% by mass, preferably 1 to 12% by mass, preferably 1 to 9% by mass, preferably 4% by mass. It is preferably contained in an amount of from 9% to 9% by mass, and preferably from 6% to 9% by mass.

  Further, the compound represented by the general formula (III) is preferably, for example, a compound represented by the formula (15.1) and / or the formula (15.2), and particularly the formula (15. It is preferable that it is a compound represented by 1).

  Furthermore, the compound represented by General Formula (III) is preferably at least one compound selected from the group of compounds represented by General Formula (III-1).

In the general formula (III-1), R ³³ represents an alkenyl group having 2 to 5 carbon atoms, and R ³² represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.

  The content of the compound represented by the general formula (III-1) is preferably adjusted according to required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. From 1% by weight to 23% by weight, preferably from 6% by weight to 18% by weight, and preferably from 10% by weight to 13% by weight, based on the total weight of the liquid crystal composition of the present invention. Is preferred.

  The compound represented by the general formula (III-1) is preferably a compound represented by, for example, the formula (16.1) and / or the formula (16.2).

  Alternatively / further, the compound represented by the general formula (III) is preferably at least one compound selected from the group of compounds represented by the general formula (III-2).

In the general formula (III-2), R ³¹ represents an alkyl group having 1 to 5 carbon atoms, and R ³⁴ represents an alkoxy group having 1 to 4 carbon atoms.

  The content of the compound represented by the general formula (III-2) is preferably adjusted according to required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, 4 mass% or more and 23 mass% or less are preferable with respect to the total mass of the liquid-crystal composition of this invention, 6 mass% or more and 18 mass% or less are preferable, and it is 10 mass% or more and 13 mass% or less. preferable.

  Furthermore, the compound represented by the general formula (III-2) is preferably at least one compound selected from the group of compounds represented by formula (17.1) to formula (17.3), Particularly preferred is a compound represented by formula (17.3).

  Furthermore, the compound represented by the general formula (L) is preferably at least one compound selected from the group of compounds represented by the general formula (V).

In the general formula (V), R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms. A ⁵¹ and A ⁵² each independently represents a 1,4-cyclohexylene group or a 1,4-phenylene group, Q ⁵ represents a single bond or —COO—, and X ⁵¹ and X ⁵² represent Each independently represents a fluorine atom or a hydrogen atom.

  There are no particular limitations on the types of compounds that can be combined, but they are appropriately combined according to required performance such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. For example, in one embodiment of the present invention, one kind of compound is used. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of the present invention, there are three types. Furthermore, in another embodiment of this invention, they are four types.

  The content of the compound represented by the general formula (V) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 30% by mass in one embodiment. Furthermore, in another embodiment of this invention, the said content is 1-25 mass%. Furthermore, in another embodiment of this invention, the said content is 1-20 mass%. Furthermore, in another embodiment of this invention, the said content is 1-17 mass%. Furthermore, in another embodiment of this invention, the said content is 1-8 mass%. Furthermore, in another embodiment of this invention, the said content is 1-4 mass%. Furthermore, in another embodiment of this invention, the said content is 2-20 mass%. Furthermore, in another embodiment of this invention, the said content is 2-17 mass%. Furthermore, in another embodiment of this invention, the said content is 2-8 mass%.

  Furthermore, it is preferable that the compound represented by general formula (V) is a compound represented by general formula (V-1).

In the general formula (V-1), R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy having 1 to 4 carbon atoms. X ⁵¹ and X ⁵² each independently represent a fluorine atom or a hydrogen atom.

  Furthermore, the compound represented by the general formula (V-1) is preferably a compound represented by the general formula (V-1-1).

In the general formula (V-1-1), R ⁵¹ and R ⁵² are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or 1 to 4 carbon atoms. Represents an alkoxy group.

  The compound represented by the general formula (V-1-1) is preferably contained in an amount of 1% by mass to 15% by mass with respect to the total mass of the liquid crystal composition of the present invention, and preferably 1% by mass to 10% by mass. It is more preferable to contain below, and it is preferable to contain 1 to 5 mass%.

  Furthermore, the compound represented by general formula (V-1-1) is at least one compound selected from the group of compounds represented by formula (20.1) to formula (20.4). Preferably, it is a compound represented by Formula (20.2).

  Alternatively / further, the compound represented by the general formula (V-1) is preferably a compound represented by the general formula (V-1-2).

In the general formula (V-1-2), R ⁵¹ and R ⁵² are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or 1 to 4 carbon atoms. Represents an alkoxy group.

  The compound represented by the general formula (V-1-2) is preferably contained in an amount of 1% by mass to 15% by mass with respect to the total mass of the liquid crystal composition of the present invention. The content is preferably 1% by mass or more and 5% by mass or less, and more preferably 1% by mass or more and 3% by mass or less.

  Further, the compound represented by the general formula (V-1-2) is preferably at least one compound selected from the group of compounds represented by the formulas (21.1) to (21.3). A compound represented by formula (21.1) is preferable.

  Alternatively / further, the compound represented by the general formula (V-1) is preferably a compound represented by the general formula (V-1-3).

In the general formula (V-1-3), R ⁵¹ and R ⁵² are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or 1 to 4 carbon atoms. Represents an alkoxy group.

  The compound represented by the general formula (V-1-3) is preferably contained in an amount of 1% by mass to 15% by mass with respect to the total mass of the liquid crystal composition of the present invention, and is preferably 2% by mass to 15% by mass. The content is preferably 3% by mass or more and 10% by mass or less, and more preferably 4% by mass or more and 8% by mass or less.

  Furthermore, the compound represented by the general formula (V-1-3) is preferably at least one compound selected from the group of compounds represented by the formulas (22.1) to (22.3). More preferably, it is a compound represented by the formula (22.1).

  Alternatively / further, the compound represented by the general formula (V) is preferably a compound represented by the general formula (V-2).

In the general formula (V-2), R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy having 1 to 4 carbon atoms. Represents a group, X ⁵¹ and X ⁵² each independently represent a fluorine atom or a hydrogen atom.

  There are no particular limitations on the types of compounds that can be combined, but they are appropriately combined depending on required performance such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, it is two or more types.

  The content of the compound represented by the general formula (V-2) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 30% by mass in one embodiment. Furthermore, in another embodiment of this invention, content of the said compound is 1-25 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 1-20 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 1-17 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 1-10 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 1-4 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-20 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 10-20 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-17 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-4 mass%.

  When an embodiment with high Tni is desired for the liquid crystal composition of the present invention, it is preferable to increase the content of the compound represented by the formula (V-2), and when an embodiment with low viscosity is desired. It is preferable to reduce the content.

  Furthermore, the compound represented by the general formula (V-2) is preferably a compound represented by the general formula (V-2-1).

In the general formula (V-2-1), R ⁵¹ and R ⁵² are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or 1 to 4 carbon atoms. Represents an alkoxy group.

  The compound represented by the general formula (V-2-1) is preferably contained in an amount of 1% by mass or more and 25% by mass or less based on the total mass of the liquid crystal composition of the present invention. The content is preferably 1% by mass or more and 17% by mass or less, preferably 1% by mass or more and 10% by mass or less, and more preferably 1% by mass or more and 4% by mass or less. Preferably contained in an amount of not less than 20% by mass and not more than 20% by mass, preferably not less than 10% by mass and not more than 20% by mass, preferably not less than 2% by mass and not more than 4% by mass. It is preferable to contain 2 mass% or more and 4 mass% or less.

  Furthermore, the compound represented by the general formula (V-2-1) is at least one compound selected from the group of compounds represented by the formulas (23.1) to (23.4). Preferably, it is a compound represented by Formula (23.1) and / or Formula (23.2).

  Alternatively / further, the compound represented by the general formula (V-2) is preferably a compound represented by the general formula (V-2-2).

In the general formula (V-2-2), R ⁵¹ and R ⁵² are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or 1 to 4 carbon atoms. Represents an alkoxy group.

  The compound represented by the general formula (V-2-2) is preferably contained in an amount of 2% by mass to 16% by mass with respect to the total mass of the liquid crystal composition of the present invention. The content is preferably 4% by mass or more and 10% by mass or less.

  Furthermore, the compound represented by the general formula (V-2-2) is at least one compound selected from the group of compounds represented by the formulas (24.1) to (24.4). A compound represented by formula (24.1) and / or formula (24.2) is preferable.

  Alternatively / further, the compound represented by the general formula (V) is preferably a compound represented by the general formula (V-3).

In the general formula (V-3), R ⁵¹ and R ⁵² are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy having 1 to 4 carbon atoms. Represents a group.

  There are no particular limitations on the types of compounds that can be combined, but they are appropriately combined according to required performance such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of this invention, they are three or more types.

  The compound represented by the general formula (V-3) is preferably contained in an amount of 1% by mass to 16% by mass with respect to the total mass of the liquid crystal composition of the present invention. It is preferable to contain 1 mass% or more and 9 mass% or less, and it is preferable to contain 3 mass% or more and 9 mass% or less.

  Furthermore, the compound represented by General Formula (V-3) is preferably at least one compound selected from the group of compounds represented by Formula (25.1) to Formula (25.3).

  Alternatively / further, the compound represented by the general formula (V) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (V-4).

In the general formula (V-4), R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy having 1 to 4 carbon atoms. Represents a group.

  The compound represented by the general formula (V-4) is preferably contained in an amount of 1% by mass to 15% by mass with respect to the total mass of the liquid crystal composition of the present invention, and preferably 2% by mass or more and 15% by mass or less. It is preferable to contain 3 mass% or more and 10 mass% or less, and it is preferable to contain 4 mass% or more and 8 mass% or less.

  Furthermore, the compound represented by the general formula (V-4) is preferably at least one compound selected from the group of compounds represented by the formulas (25.11) to (25.13). The compound represented by (25.13) is more preferable.

  Alternatively / further, the compound represented by the general formula (L) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (V′-5).

In the general formula (V′-5), R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkyl group having 1 to 4 carbon atoms. Represents an alkoxy group.

  The compound represented by the general formula (V′-5) is preferably contained in an amount of 1% by mass to 15% by mass with respect to the total mass of the liquid crystal composition of the present invention, and is preferably 2% by mass to 15% by mass. It is preferable to contain, it is preferable to contain 2 to 10 mass%, and it is preferable to contain 5 to 10 mass%.

  Furthermore, the compound represented by the general formula (V′-5) is preferably at least one compound selected from the group of compounds represented by formula (25.21) to formula (25.24), A compound represented by formula (25.21) and / or formula (25.23) is more preferable.

  The liquid crystal composition of the present invention may further contain at least one compound represented by the general formula (VI).

In the general formula (VI), R ⁶¹ and R ⁶² are each independently a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms, or 2 to 10 carbon atoms. Represents a straight-chain alkenyl group.

There are no particular restrictions on the types of compounds that can be combined, but depending on the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence, 1 to 3 of these compounds can be used. It is preferable to mix | blend a kind, It is more preferable to contain 1-4 types, It is especially preferable to contain 1-5 types or more.
The content of the compound represented by the general formula (VI) is preferably 0 to 35% by mass, and preferably 0 to 25% by mass with respect to the total mass of the liquid crystal composition of the present invention. 0 to 15% by mass is preferable.

  As the compound represented by the general formula (VI), specifically, the following compounds can be preferably used.

  The liquid crystal composition of the present invention can further contain at least one compound represented by the general formula (VII).

In the general formula (VII), R ⁷¹ and R ⁷² are each independently a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms, or 4 to 10 carbon atoms. Represents a straight-chain alkenyl group.

  There are no particular restrictions on the types of compounds that can be combined, but these compounds are appropriately selected according to the required performance such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. It is preferable to mix 1 to 3 types, more preferably 1 to 4 types, and particularly preferably 1 to 5 types or more.

  The content of the compound represented by the general formula (VII) is preferably 0 to 35% by mass, more preferably 0 to 25% by mass, and 0 to 15% by mass with respect to the total mass of the liquid crystal composition of the present invention. % Is preferred.

  As the compound represented by the general formula (VII), specifically, the following compounds can be preferably used.

  The liquid crystal composition of the present invention preferably further contains at least one compound represented by the following general formula (M).

In the general formula (M), R ^M1 represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently — Optionally substituted by CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
PM represents 0, 1, 2, 3 or 4;
C ^M1 and C ^M2 are each independently
(D) 1,4-cyclohexylene group (this is present in the group one -CH ₂ - or nonadjacent two or more -CH ₂ - may be replaced by -O- or -S- And (e) a 1,4-phenylene group (one —CH═ present in this group or two or more —CH═ not adjacent to each other may be replaced by —N═).
The group (d) and the group (e) are each independently substituted with a cyano group, a fluorine atom or a chlorine atom,
K ^M1 and K ^M2 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O. -, -COO-, -OCO- or -C≡C-
When PM is 2, 3 or 4 and there are a plurality of K ^M1 , they may be the same or different, and when PM is 2, 3 or 4 and there are a plurality of C ^M2 They may be the same or different,
X ^M1 and X ^M3 each independently represent a hydrogen atom, a chlorine atom or a fluorine atom,
X ^M2 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, or a 2,2,2-trifluoroethyl group. However, the compound represented by the general formula (i) is excluded.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of the present invention, there are three types. Furthermore, in another embodiment of this invention, they are four types. Furthermore, in another embodiment of the present invention, there are five types. Furthermore, in another embodiment of the present invention, there are six types. Furthermore, in another embodiment of this invention, they are seven or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (M) is low temperature solubility, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, It is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

  Content of the compound represented with the said general formula (M) is 1-70 mass% as one embodiment of this invention with respect to the total mass of the liquid-crystal composition of this invention. Further, for example, in another embodiment of the present invention, the content of the compound is 1% to 65% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 60% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 52% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 38% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 32% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 29% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 22% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 15% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 10% by mass. For example, in still another embodiment of the present invention, the content of the compound is 3% to 60% by mass. For example, in still another embodiment of the present invention, the content of the compound is 10% to 60% by mass. For example, in still another embodiment of the present invention, the content of the compound is 18% to 60% by mass. For example, in still another embodiment of the present invention, the content of the compound is 21% to 60% by mass. For example, in still another embodiment of the present invention, the content of the compound is 26% to 60% by mass. For example, in still another embodiment of the present invention, the content of the compound is 29% to 60% by mass. For example, in still another embodiment of the present invention, the content of the compound is 33% to 60% by mass. For example, in still another embodiment of the present invention, the content of the compound is 3% to 52% by mass. For example, in still another embodiment of the present invention, the content of the compound is 3% to 38% by mass. For example, in still another embodiment of the present invention, the content of the compound is 3% to 20% by mass. For example, in still another embodiment of the present invention, the content of the compound is 3% to 15% by mass. For example, in still another embodiment of the present invention, the content of the compound is 3% to 8% by mass. For example, in still another embodiment of the present invention, the content of the compound is 10% to 15% by mass. For example, in still another embodiment of the present invention, the content of the compound is 11% to 15% by mass. For example, in still another embodiment of the present invention, the content of the compound is 18% to 22% by mass. For example, in still another embodiment of the present invention, the content of the compound is 18% to 20% by mass. For example, in still another embodiment of the present invention, the content of the compound is 21% to 32% by mass. For example, in still another embodiment of the present invention, the content of the compound is 26% to 38% by mass. For example, in still another embodiment of the present invention, the content of the compound is 33% to 38% by mass. For example, in still another embodiment of the present invention, the content of the compound is 29% to 52% by mass. For example, in still another embodiment of the present invention, the content of the compound is 32% to 52% by mass. For example, in still another embodiment of the present invention, the content of the compound is 38% to 52% by mass.

  When the liquid crystal composition of the present invention maintains a low viscosity and a liquid crystal composition having a high response speed is required, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the liquid crystal composition of the present invention maintains a high Tni and a liquid crystal composition with good temperature stability is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.

R ^M1 is a linear alkyl group having 1 to 5 carbon atoms or a linear alkoxy group having 1 to 4 carbon atoms when the ring structure to which R ^M1 is bonded is a phenyl group (aromatic). And when the ring structure to which it is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a linear alkyl group having 1 to 5 carbon atoms, A straight-chain alkoxy group having 1 to 4 carbon atoms and a straight-chain alkenyl group having 2 to 5 carbon atoms are preferred.

  The compound represented by the general formula (M) preferably does not have a chlorine atom in the molecule when chemical stability of the liquid crystal composition is required. Furthermore, the content of the compound having a chlorine atom in the liquid crystal composition is preferably 0 to 5% by mass, and preferably 0 to 3% by mass with respect to the total mass of the liquid crystal composition of the present invention. 0 to 1% by mass, preferably 0 to 0.5% by mass, and substantially not contained. “Substantially not contained” means that only a compound containing a chlorine atom unintentionally enters the liquid crystal composition, such as a compound produced as an impurity during compound production.

  The compound represented by the general formula (M) is preferably at least one compound selected from the group of compounds represented by the general formula (VIII), for example.

In the general formula (VIII), R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ^{81 to} X ⁸⁵ are: Each independently represents a hydrogen atom or a fluorine atom, and Y ⁸ represents a fluorine atom or —OCF ₃ . However, the compound represented by the formula (i) is excluded.

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, According to desired performances, such as low temperature solubility, transition temperature, electrical reliability, birefringence, it uses suitably combining. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of this invention, they are three or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (VIII) is low-temperature solubility, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, It is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

  The content of the compound represented by the general formula (VIII) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 25% by mass in one embodiment of the present invention. Furthermore, for example, in another embodiment of the present invention, the content of the compound is 1% to 20% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 15% by mass. For example, in still another embodiment of the present invention, the content of the compound is 5% to 15% by mass. For example, in still another embodiment of the present invention, the content of the compound is 7% to 12% by mass.

  When the liquid crystal composition of the present invention maintains a low viscosity and a liquid crystal composition having a high response speed is required, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the liquid crystal composition of the present invention maintains a high Tni and a liquid crystal composition with good temperature stability is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.

  Furthermore, it is preferable that the compound represented by general formula (VIII) is a compound represented by general formula (VIII-1).

In General Formula (VIII-1), R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms. However, the compound represented by the formula (i) is excluded.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, it is two or more types.

  Furthermore, the compound represented by the general formula (VIII-1) is specifically selected from the group of compounds represented by the formula (26.1), the formula (26.3), and the formula (26.4). Preferably, the compound represented by the formula (26.1) is preferable.

  The content of the compound represented by the formula (26.1) is the total mass of the liquid crystal composition of the present invention in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like. Is preferably 1% by mass or more and 20% by mass or less, more preferably 1% by mass or more and 15% by mass or less, still more preferably 5% by mass or more and 15% by mass or less, and more preferably 7% by mass or more and 12% by mass. The following is preferred.

  Alternatively / further, the compound represented by the general formula (VIII) is preferably a compound represented by the general formula (VIII-2).

In General Formula (VIII-2), R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Or in another embodiment of this invention, they are three or more types.

  The content of the compound represented by the general formula (VIII-2) is the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, birefringence, and the like. Is preferably 2.5% by mass or more and 25% by mass or less, more preferably 8% by mass or more and 25% by mass or less, and preferably 10% by mass or 20% by mass or less, and 12% by mass. It is preferable that it is 15 mass% or less.

  Further, the compound represented by the general formula (VIII-2) is preferably at least one compound selected from the group of compounds represented by the formulas (27.1) to (27.4). The compound represented by (27.2) is preferable.

  Alternatively / further, the compound represented by the general formula (VIII) is preferably a compound represented by the general formula (VIII-3).

In General Formula (VIII-3), R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, it is two or more types.

  The content of the compound represented by the general formula (VIII-3) is the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, birefringence, and the like. Is preferably 0.5% by mass or more and 15% by mass or less, more preferably 0.5% by mass or more and 10% by mass or less, and more preferably 0.5% by mass or more and 5% by mass or less. Preferably, it is 1 mass% or more and 5 mass% or less.

  Furthermore, the compound represented by the general formula (VIII-3) is specifically at least one compound selected from the group of compounds represented by formula (26.11) to formula (26.14). The compound represented by the formula (26.11) and / or the formula (26.12) is preferable, and the compound represented by the formula (26.12) is more preferable.

  Alternatively / further, the compound represented by the general formula (VIII) is preferably a compound represented by the general formula (VIII-4).

In General Formula (VIII-4), R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

  The content of the compound represented by the general formula (VIII-4) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.

  For example, the content of the compound represented by the general formula (VIII-4) is 1 to 25% by mass in one embodiment of the present invention relative to the total mass of the liquid crystal composition of the present invention. 2 to 25% by weight in a form, 3 to 20% by weight in yet another embodiment, 3 to 13% by weight in still another embodiment, and 3 to 13% in still another embodiment. Is 3 to 10% by mass, and in still another embodiment, the content of the compound is 1 to 5% by mass.

  Furthermore, the compound represented by General Formula (VIII-4) used in the liquid crystal composition of the present invention is specifically from the compound group represented by Formula (26.21) to Formula (26.24). It is preferable that it is at least one compound selected, and among these, it is more preferable to contain a compound represented by the formula (26.24).

  Furthermore, the compound represented by the general formula (M) is preferably at least one compound selected from the group of compounds represented by the general formula (IX), for example.

In the general formula (IX), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ⁹¹ and X ⁹² are: Each independently represents a hydrogen atom or a fluorine atom, Y ⁹ represents a fluorine atom, a chlorine atom or —OCF ₃ , and U ⁹ represents a single bond, —COO— or —CF ₂ O—.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of the present invention, there are three types. Furthermore, in another embodiment of this invention, they are four types. Furthermore, in another embodiment of the present invention, there are five types. Furthermore, in another embodiment of this invention, they are six or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (IX) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, It is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

  The content of the compound represented by the general formula (IX) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 55% by mass in one embodiment of the present invention. Further, for example, in another embodiment of the present invention, the content of the compound is 1% to 50% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 45% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 41% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 14% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 12% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 8% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 3% by mass. For example, in still another embodiment of the present invention, the content of the compound is 2% to 50% by mass. For example, in still another embodiment of the present invention, the content of the compound is 8% to 50% by mass. For example, in still another embodiment of the present invention, the content of the compound is 11% to 50% by mass. For example, in still another embodiment of the present invention, the content of the compound is 39% to 50% by mass. For example, in still another embodiment of the present invention, the content of the compound is 39% to 41% by mass. For example, in still another embodiment of the present invention, the content of the compound is 2% to 14% by mass. For example, in still another embodiment of the present invention, the content of the compound is 2% to 12% by mass. For example, in still another embodiment of the present invention, the content of the compound is 2% to 8% by mass. For example, in still another embodiment of the present invention, the content of the compound is 2% to 3% by mass. For example, in still another embodiment of the present invention, the content of the compound is 3% to 8% by mass. For example, in still another embodiment of the present invention, the content of the compound is 8% to 14% by mass.

  When the liquid crystal composition of the present invention maintains a low viscosity and a liquid crystal composition having a high response speed is required, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the liquid crystal composition of the present invention requires a high Tni and a liquid crystal composition that does not easily cause burn-in, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.

  Furthermore, the compound represented by the general formula (IX) is preferably a compound represented by the general formula (IX-1).

In the general formula (IX-1), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ⁹² represents a hydrogen atom. or represents a fluorine atom, ^{Y 9} represents a fluorine atom or -OCF _3.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of the present invention, there are three types. Furthermore, in another embodiment of this invention, they are four or more types.

  Furthermore, the compound represented by the general formula (IX-1) is preferably a compound represented by the general formula (IX-1-1).

In the general formula (IX-1-1), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of this invention, they are three or more types.

  The content of the compound represented by the general formula (IX-1-1) is appropriately adjusted according to the embodiment in consideration of solubility at a low temperature, transition temperature, electrical reliability, birefringence, and the like. The

  The content of the compound represented by the general formula (IX-1-1) with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 35% by mass as one embodiment of the present invention. . Further, for example, in another embodiment of the present invention, the content of the compound is 1% to 30% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 25% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 20% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 11% by mass. For example, in still another embodiment of the present invention, the content of the compound is 1% to 8% by mass. For example, in still another embodiment of the present invention, the content of the compound is 3% to 25% by mass. For example, in still another embodiment of the present invention, the content of the compound is 6% to 25% by mass. For example, in still another embodiment of the present invention, the content of the compound is 11% to 25% by mass. For example, in still another embodiment of the present invention, the content of the compound is 17% to 25% by mass. For example, in still another embodiment of the present invention, the content of the compound is 3% to 19% by mass. For example, in still another embodiment of the present invention, the content of the compound is 3% to 11% by mass. For example, in still another embodiment of the present invention, the content of the compound is 3% to 8% by mass. For example, in still another embodiment of the present invention, the content of the compound is 3% to 6% by mass. For example, in still another embodiment of the present invention, the content of the compound is 6% to 19% by mass. For example, in still another embodiment of the present invention, the content of the compound is 6% to 17% by mass. For example, in still another embodiment of the present invention, the content of the compound is 6% to 11% by mass. For example, in still another embodiment of the present invention, the content of the compound is 6% to 8% by mass. For example, in still another embodiment of the present invention, the content of the compound is 8% to 11% by mass. For example, in still another embodiment of the present invention, the content of the compound is 11% to 19% by mass. For example, in still another embodiment of the present invention, the content of the compound is 11% to 17% by mass. For example, in still another embodiment of the present invention, the content of the compound is 17% to 19% by mass.

  Furthermore, the compound represented by the general formula (IX-1-1) is at least one compound selected from the group of compounds represented by formula (28.1) to formula (28.5). A compound represented by formula (28.3) and / or formula (28.5) is preferable.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (28.3) is preferably 1% by mass or more and 25% by mass or less, and preferably 1% by mass or more with respect to the total amount of the liquid crystal composition of the present invention. 20 mass% or less is preferable and 1 mass% or more and 15 mass% or less are preferable. Among these, 1% by mass to 10% by mass, 1% by mass to 8% by mass, 1% by mass to 6% by mass, 3% by mass to 10% by mass, 3% by mass to 8% by mass, 6% The mass% is preferably 9% by mass or less and 7% by mass or more and 10% by mass or less.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (28.5) is determined in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. 1% by mass or more and 25% by mass or less is preferable, 1% by mass or more and 20% by mass or less is preferable, 1% by mass or more and 15% by mass or less is preferable, and 3% by mass or more and 15% by mass or less is preferable. Preferably, 5 mass% or more and 10 mass% or less are preferable.

  When the compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is two or three kinds, it is represented by the formula (28.5) with respect to the total mass of the liquid crystal composition. The content of the compound is preferably at least 3% by mass, more preferably 3% by mass to 15% by mass, and still more preferably 5% by mass to 10% by mass.

  Alternatively / further, the compound represented by the general formula (IX-1) is preferably a compound represented by the general formula (IX-1-2).

In the general formula (IX-1-2), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in the kind of compound which can be combined, It is preferable to combine 1 type to 3 types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine the four types.

  The content of the compound represented by the general formula (IX-1-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 1% by mass to 30% by mass, preferably 5% by mass to 30% by mass, more preferably 8% by mass to 30% by mass, and preferably 10% by mass to 25% by mass, 14 mass% or more and 22 mass% or less are preferable, and 16 mass% or more and 20 mass% or less are preferable.

  Furthermore, the compound represented by the general formula (IX-1-2) may be at least one compound selected from the group of compounds represented by formula (29.1) to formula (29.4). A compound represented by formula (29.2) and / or formula (29.4) is preferable.

  Alternatively / further, the compound represented by the general formula (IX) is preferably a compound represented by the general formula (IX-2).

In the general formula (IX-2), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ⁹¹ and X ⁹² Each independently represents a hydrogen atom or a fluorine atom, and Y ⁹ represents a fluorine atom, a chlorine atom or —OCF ₃ .

  Although there is no restriction | limiting in the kind of compound which can be combined, Considering solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it uses combining suitably for every embodiment. For example, one embodiment of the present invention has one type, another embodiment has two types, yet another embodiment has three types, yet another embodiment has four types, and yet another embodiment has five types, In still another embodiment, six or more types are combined.

  Furthermore, the compound represented by General Formula (IX-2) is preferably a compound represented by General Formula (IX-2-1).

In the general formula (IX-2-1), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in the kind of compound which can be combined, It is preferable to combine 1-3 types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc.

  The content of the compound represented by the general formula (IX-2-1) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.

  For example, in one embodiment of the present invention, the content of the compound represented by the general formula (IX-2-1) is 1 to 25% by mass with respect to the total mass of the liquid crystal composition of the present invention. It is preferably 1 to 20% by mass, more preferably 1 to 15% by mass.

  Furthermore, the compound represented by the general formula (IX-2-1) is preferably at least one compound selected from the group of compounds represented by the formulas (30.1) to (30.4). And a compound represented by formula (30.1) and / or formula (30.2).

  The content of the compound represented by the formula (30.1) is preferably 1 to 15% by mass and preferably 1 to 10% by mass with respect to the total mass of the liquid crystal composition of the present invention. More preferably, it is still more preferably 1 to 5% by mass.

  The content of the compound represented by the formula (30.2) is preferably 1 to 20% by mass, and 5 to 16% by mass with respect to the total mass of the liquid crystal composition of the present invention. More preferably, it is 8 to 13% by mass.

  In the liquid crystal composition containing 2 to 3 types of compounds represented by the general formula (ii), the compound represented by the general formula (IX-2-1) And a compound represented by the formula (30.2) are more preferably included. The compound represented by the formula (i), the compound represented by the general formula (ii), the compound represented by the formula (30.1), and the formula (30) with respect to the total mass of the liquid crystal composition. .2) is preferably 23 to 49% by mass, more preferably 28 to 44% by mass, and still more preferably 33 to 39% by mass.

  Alternatively / further, the compound represented by the general formula (IX-2) is preferably a compound represented by the general formula (IX-2-2).

In the general formula (IX-2-2), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in the kind of compound which can be combined, It is preferable to combine 1-3 types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., 1-4 types It is more preferable to combine.

The content of the compound represented by the general formula (IX-2-2) is appropriately determined for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. Adjusted.
For example, the content of the compound represented by the general formula (IX-2-2) is 1 to 25% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. 3-25 wt.% In yet another embodiment, 6-25 wt.% In yet another embodiment, 9-25 wt.% In yet another embodiment, 12-25 wt. It is 12-20 mass% in a form, and 12-17 mass% in another embodiment. Among these, it is preferable that content of the compound represented by the said general formula (IX-2-2) is 9 mass% or more with respect to the total mass of the liquid-crystal composition of this invention.

  Furthermore, the compound represented by the general formula (IX-2-2) is preferably at least one compound selected from the group of compounds represented by the formulas (31.1) to (31.4). It is preferably at least one compound selected from the group of compounds represented by formulas (31.2) to (31.4), and is preferably a compound represented by formula (31.2). .

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (31.2) is 3 to 25 mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. %, In another embodiment 9-25% by weight, in yet another embodiment 12-25% by weight, in yet another embodiment 12-20% by weight, in yet another embodiment 12-17% by weight, is there. Among these, the content of the compound represented by the formula (31.2) is preferably at least 9% by mass with respect to the total mass of the liquid crystal composition of the present invention, and is 9 to 25% by mass. More preferably, in still another embodiment, it is more preferably 12 to 25% by mass, still more preferably 12 to 20% by mass, and particularly preferably 12 to 17% by mass.

  The compound represented by the general formula (ii) includes at least two kinds of compounds, and the compound represented by the general formula (IX-2-2) further includes a compound represented by the formula (31.2). In the liquid crystal composition including the compound represented by the formula (i), the compound represented by the general formula (ii), and the formula (31.2) with respect to the total mass of the liquid crystal composition. The total content of the compound is preferably 27 to 45% by mass, more preferably 29 to 41% by mass, and still more preferably 32 to 38% by mass.

  Alternatively / further, the compound represented by the general formula (IX-2) is preferably a compound represented by the general formula (IX-2-3).

In the general formula (IX-2-3), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in the kind of compound which can be combined, It is preferable to combine 1-2 types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc.

  The content of the compound represented by the general formula (IX-2-3) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. On the other hand, 1 mass% or more and less than 10 mass% is preferable, 1 mass% or more and 8 mass% or less are more preferable, and 5 mass% or more and 8 mass% or less are still more preferable.

  Furthermore, the compound represented by the general formula (IX-2-3) is preferably at least one compound selected from the group of compounds represented by the formulas (32.1) to (32.4). And a compound represented by formula (32.2) and / or formula (32.4).

  The compound represented by the formula (32.2) or the content of the compound represented by the formula (32.4) includes solubility at low temperature, transition temperature, electrical reliability, etc. In consideration of the above, it is preferably 0.5% by mass or more and less than 5% by mass, more preferably 0.5% by mass or more and 4% by mass or less, based on the total mass of the liquid crystal composition of the present invention. % To 4% by mass is even more preferable.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is one kind, and the compound represented by the general formula (IX-2-3) is represented by the formula (32.2). In the liquid crystal composition further comprising the compound represented by the formula (32.4) and the compound represented by the formula (i) relative to the total mass of the liquid crystal composition, the general formula ( The total content of the compound represented by ii), the compound represented by the formula (32.2), and the compound represented by the formula (32.4) is more preferably 6 to 21% by mass, -19% by mass is more preferable, and 12-17% by mass is even more preferable.

  Alternatively / further, the compound represented by the general formula (IX-2) is preferably a compound represented by the general formula (IX-2-4).

In the general formula (IX-2-4), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  The content of the compound represented by the general formula (IX-2-4) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 1% by mass to 25% by mass, preferably 1% by mass to 20% by mass, preferably 1% by mass to 15% by mass, and preferably 1% by mass to 12% by mass, 5 mass% or more and 12 mass% or less are preferable, and 7 mass% or more and 12 mass% or less are preferable.

  Furthermore, the compound represented by the general formula (IX-2-4) is preferably at least one compound selected from the group of compounds represented by the formulas (33.1) to (33.6). And a compound represented by formula (33.1) and / or formula (33.3).

  Alternatively / further, the compound represented by the general formula (IX-2) is preferably a compound represented by the general formula (IX-2-5).

In the general formula (IX-2-5), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in the kind of compound which can be combined, Considering solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it uses combining suitably for every embodiment. For example, one embodiment of the present invention has one type, another embodiment has two types, yet another embodiment has three types, and yet another embodiment has four or more types.

The content of the compound represented by the general formula (IX-2-5) is appropriately determined for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. Adjusted.
For example, the content of the compound represented by the general formula (IX-2-5) is 1 to 25% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. 1 to 20 mass% in yet another embodiment, 1 to 15 mass% in yet another embodiment, 5 to 15 mass% in yet another embodiment, and 5 to 10 mass% in yet another embodiment. .

  When the liquid crystal composition of the present invention maintains a low viscosity and a liquid crystal composition having a high response speed is required, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the liquid crystal composition of the present invention requires a high Tni and a liquid crystal composition that does not easily cause burn-in, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.

  Furthermore, the compound represented by General Formula (IX-2-5) is preferably at least one compound selected from the group of compounds represented by Formula (34.1) to Formula (34.7). More preferably, it is a compound represented by formula (34.1), formula (34.2), formula (34.3) and / or formula (34.5), represented by formula (34.2). More preferably, the compound is

  There are two or three compounds represented by the general formula (ii) contained in the liquid crystal composition of the present invention, and the compound represented by the formula (34.2) is represented by the general formula (IX-2-5). ) Is further included, the content of the compound represented by the formula (34.2) is preferably 1 to 20% by mass with respect to the total mass of the liquid crystal composition. 5 to 15% by mass is more preferable, and 5 to 10% by mass is even more preferable.

  Alternatively / further, the compound represented by the general formula (IX) is preferably a compound represented by the general formula (IX-3).

In the general formula (IX-3), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ⁹¹ and X ⁹² Each independently represents a hydrogen atom or a fluorine atom, and Y ⁹ represents a fluorine atom, a chlorine atom or —OCF ₃ .

  Furthermore, it is preferable that the compound represented by general formula (IX-3) is a compound represented by general formula (IX-3-1).

In the general formula (IX-3-1), R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in the kind of compound which can be combined, It is preferable to combine 1-2 types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc.

  The content of the compound represented by the general formula (IX-3-1) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 3% by mass or more and 30% by mass or less, preferably 7% by mass or more and 30% by mass or less, preferably 13% by mass or more and 20% by mass or less, and more preferably 15% by mass or more and 18% by mass or less.

  Furthermore, the compound represented by the general formula (IX-3-1) is preferably at least one compound selected from the group of compounds represented by the formulas (35.1) to (35.4). And a compound represented by formula (35.1) and / or formula (35.2).

  Alternatively / further, the compound represented by the general formula (M) is preferably a compound represented by the general formula (X).

In the general formula (X), X ^{101 to} X ¹⁰⁴ each independently represent a fluorine atom or a hydrogen atom, Y ¹⁰ represents a fluorine atom, a chlorine atom, or —OCF ₃ , and Q ¹⁰ represents a single bond or represents -CF ₂ ^{O-, R 10} represents an alkyl group, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon atoms of 1 to 5 carbon ^{atoms, a 101} and ^{a 102} are Each independently represents a 1,4-cyclohexylene group, a 1,4-phenylene group, or any one group represented by the following formula, but the hydrogen atom on the 1,4-phenylene group is a fluorine atom. May be substituted.

  There are no particular limitations on the compounds that can be combined, but they are combined as appropriate in consideration of solubility at low temperatures, transition temperatures, electrical reliability, birefringence, and the like. For example, in one embodiment of the present invention, there is one. In another embodiment of the present invention, there are two types. In yet another embodiment, there are three types. In still another embodiment, there are four types. In still another embodiment, there are five or more types.

  The content of the compound represented by the general formula (X) is appropriately adjusted for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. For example, the content of the compound represented by the general formula (X) is 1 to 35% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention, and in another embodiment. 1 to 30% by weight, yet another embodiment is 1 to 26% by weight, yet another embodiment is 1 to 21% by weight, yet another embodiment is 1 to 17% by weight, and yet another embodiment. 1 to 14% by weight, yet another embodiment 1 to 11% by weight, yet another embodiment 1 to 9% by weight, yet another embodiment 2 to 30% by weight, yet another In embodiments, 5-30% by weight, in yet another embodiment the content is 9-30% by weight, in yet another embodiment the content is 11-30% by weight, and in yet another embodiment the content 14-30% by weight, yet another implementation In another embodiment, the content is 16-30% by mass, and in still another embodiment, the content is 20-30% by mass. In still another embodiment, the content is 2-5% by mass, and in still another embodiment. The content is 9-14% by weight, and in yet another embodiment the content is 16-17% by weight, and in yet another embodiment the content is 20-21% by weight.

  When the liquid crystal composition of the present invention maintains a low viscosity and a liquid crystal composition having a high response speed is required, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when a liquid crystal composition that does not easily cause burn-in is required, it is preferable to lower the lower limit value and lower the upper limit value. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.

  The compound represented by the general formula (X) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (X-1).

In the general formula ^{(X-1), X 101} ~X 103 each independently represent a fluorine atom or a hydrogen ^{atom, R 10} is an alkyl group having 1 to 5 carbon atoms, 2-5 carbon atoms An alkenyl group or an alkoxy group having 1 to 4 carbon atoms is represented.

  Although there is no restriction | limiting in particular in the compound which can be combined, It combines suitably for every embodiment in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. For example, in one embodiment of the present invention, there is one. In another embodiment of the present invention, there are two types. In yet another embodiment, there are three types. In still another embodiment, there are four types. In still another embodiment, there are five or more types.

The content of the compound represented by the general formula (X-1) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.
For example, the content of the compound represented by the general formula (X-1) is 1 to 20% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. 1-15% by weight in a form, 1-10% by weight in yet another embodiment, 1-9% by weight in yet another embodiment, 1-7% by weight in yet another embodiment, and yet another 1 to 6% by weight in an embodiment, 1 to 3% by weight in yet another embodiment, 2 to 9% by weight in yet another embodiment, 4 to 9% by weight in yet another embodiment, and further In another embodiment 6-9% by weight, in yet another embodiment 7-9% by weight, in yet another embodiment 3-7% by weight, in yet another embodiment 4-7% by weight, In still another embodiment, it is 6-7% by mass.

  Furthermore, it is preferable that the compound represented by general formula (X-1) used for the liquid-crystal composition of this invention is a compound represented by general formula (X-1-1).

In the general formula (X-1-1), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular limitations on the compounds that can be combined, but they are combined as appropriate in consideration of solubility at low temperatures, transition temperatures, electrical reliability, birefringence, and the like. For example, in one embodiment of the present invention, there is one. In another embodiment of the present invention, there are two types. In yet another embodiment, there are three types. In still another embodiment, there are four or more types.

The content of the compound represented by the general formula (X-1-1) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.
For example, the content of the compound represented by the general formula (X-1-1) is 1 to 25% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. 1 to 20% by weight in yet another embodiment, 1 to 15% by weight in yet another embodiment, 1 to 10% by weight in yet another embodiment, 3 to 10% by weight in yet another embodiment, and still more In another embodiment, it is 4-9 mass%, and in another embodiment, 6-9 mass%.

  Furthermore, the compound represented by the general formula (X-1-1) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (36.1) to the formula (36.4). It is preferably at least one compound selected from the group, and among them, it is preferable to contain a compound represented by formula (36.1) and / or formula (36.2).

  There are two or three compounds represented by the general formula (ii) contained in the liquid crystal composition of the present invention, and the compound represented by the formula (36.2) is represented by the general formula (X-1-1). ) Is further included, the content of the compound represented by the formula (36.2) with respect to the total mass of the liquid crystal composition is preferably 1 to 15% by mass, and preferably 4 to 10% by mass. % Is more preferable, and 5 to 8% by mass is even more preferable.

  Alternatively / further, the compound represented by General Formula (X-1) used in the liquid crystal composition of the present invention is preferably a compound represented by General Formula (X-1-2).

In the general formula (X-1-2), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

The content of the compound represented by the general formula (X-1-2) is appropriately adjusted in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like.
For example, the content of the compound represented by the general formula (X-1-2) is 1 to 20% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. In another embodiment, 1 to 15% by mass, in yet another embodiment 1 to 10% by mass, in yet another embodiment 1 to 7% by mass, and in yet another embodiment 2 to 7% by mass.

  Furthermore, the compound represented by the general formula (X-1-2) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (37.1) to the formula (37.4). It is preferably at least one compound selected from the group, and among them, it is preferable to contain a compound represented by the formula (37.2).

  Alternatively / further, the compound represented by the general formula (X-1) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (X-1-3).

In General Formula (X-1-3), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in particular in the compound which can be combined, It is preferable to combine 1 type (s) or 2 or more types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc.

The content of the compound represented by the general formula (X-1-3) is appropriately adjusted in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like.
For example, the content of the compound represented by the general formula (X-1-3) is 1 to 20% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. In another embodiment, 1 to 15% by mass, in yet another embodiment 1 to 10% by mass, in yet another embodiment 1 to 7% by mass, and in yet another embodiment 5 to 7% by mass.

  Furthermore, the compound represented by the general formula (X-1-3) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (38.1) to the formula (38.4). It is preferably at least one compound selected from the group, and among them, it is preferable to contain a compound represented by the formula (38.2).

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (38.2) is 1% by mass or more and 20% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. Preferably, it is 1% by mass to 15% by mass or less, preferably 1% by mass to 10% by mass, preferably 1% by mass to 8% by mass, and preferably 3% by mass to 5% by mass. The content is preferably 4% by mass or more and 5% by mass or less.

  Alternatively / further, the compound represented by the general formula (X) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (X-2).

In the general formula (X-2), X ¹⁰² and X ¹⁰³ each independently represent a fluorine atom or a hydrogen atom, Y ¹⁰ represents a fluorine atom, a chlorine atom or —OCF ₃ , and R ¹⁰ represents a carbon atom. An alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms is represented.

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

  Furthermore, the compound represented by the general formula (X-2) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (X-2-1).

In the general formula (X-2-1), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular restrictions on the compounds that can be combined. In consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence and the like, it is preferable to combine one type or two types or more, and it is more preferable to combine three types or more.

  The content of the compound represented by the general formula (X-2-1) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 1% by mass or more and 23% by mass or less, more preferably 1% by mass or more and 18% by mass or less, still more preferably 1% by mass or more and 13% by mass or less, and more preferably 3% by mass or more and 8% by mass or less. Is particularly preferred.

  Furthermore, the compound represented by the general formula (X-2-1) used in the liquid crystal composition of the present invention is specifically represented by the formula (39.1) to the formula (39.4). It is preferably at least one compound selected from the group of compounds, and among them, it is preferable to contain a compound represented by the formula (39.2).

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (39.2) is 1% by mass to 23% by mass with respect to the total mass of the liquid crystal composition of the present invention. It is preferably 1% by mass or more and 18% by mass or less, more preferably 1% by mass or more and 13% by mass or less, and particularly preferably 3% by mass or more and 8% by mass or less.

  A compound represented by the formula (39.2) is included as a compound represented by the general formula (X-2-1), including two or three kinds of compounds represented by the general formula (ii). In the liquid crystal composition further comprising the compound represented by the formula (i), the compound represented by the general formula (ii), and the formula (39.2) with respect to the total mass of the liquid crystal composition. 10-35 mass% is preferable, as for the total content of the compound represented, 15-30 mass% is more preferable, and 18-26 mass% is still more preferable.

  Alternatively / further, the compound represented by General Formula (X-2) used in the liquid crystal composition of the present invention is preferably a compound represented by General Formula (X-2-2).

In the general formula (X-2-2), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

  The content of the compound represented by the general formula (X-2-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. On the other hand, it is preferable that they are 3 mass% or more and 20 mass% or less, 6 mass% or more and 16 mass% or less are preferable, 9 mass% or more and 12 mass% or less are preferable, and 9 mass% or more and 10 mass% or less are preferable.

  Furthermore, the compound represented by the general formula (X-2-2) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (40.1) to the formula (40.4). It is preferably at least one compound selected from the group, and among them, it is preferable to contain a compound represented by the formula (40.2).

  Alternatively / further, the compound represented by the general formula (X) is preferably a compound represented by the general formula (X-3).

In the general formula (X-3), X ¹⁰² and X ¹⁰³ each independently represent a fluorine atom or a hydrogen atom, and R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms and 2 to 5 carbon atoms. An alkenyl group or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular restrictions on the compounds that can be combined. In consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence and the like, it is preferable to combine one or more kinds.

  Furthermore, the compound represented by the general formula (X-3) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (X-3-1).

In the general formula (X-3-1), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

The content of the compound represented by the general formula (X-3-1) is appropriately adjusted in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like.
For example, the content of the compound represented by the general formula (X-3-1) is 0.5% by mass or more in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. % By mass or less, in another embodiment 0.5% by mass or more and 3% by mass or less, in still another embodiment 0.5% by mass or more and less than 2% by mass, and in still another embodiment 0.5% by mass or more and 1% by mass or less. % By mass or less.

  Furthermore, the compound represented by the general formula (X-3-1) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (41.1) to the formula (41.4). It is preferably at least one compound selected from the group, and among them, it is preferable to contain a compound represented by the formula (41.2).

The content of the compound represented by the formula (41.2) is appropriately adjusted in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like.
For example, the content of the compound represented by the formula (41.2) is 0.5% by mass or more and 6% by mass or less in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. In another embodiment, 0.5 mass% to 3 mass%, in yet another embodiment 0.5 mass% to less than 2 mass%, and in yet another embodiment 0.5 mass% to 1.5 mass%. % Or less. Among these, the content of the compound represented by the formula (41.2) is preferably 0.5% by mass or more and less than 2% by mass with respect to the total mass of the liquid crystal composition of the present invention, More preferably, it is 0.5 mass% or more and 1.5 mass% or less.

  A liquid crystal composition in which only one type of compound is included as the general formula (ii), and a compound represented by the formula (41.2) is further included as a compound represented by the general formula (X-3-1). In the product, the compound represented by the formula (i), the compound represented by the general formula (ii), and the formula (41.2) with respect to the total mass of the liquid crystal composition. The total content of the compound is more preferably 3 to 20% by mass, more preferably 5 to 17% by mass, and still more preferably 8 to 14% by mass.

  Alternatively / further, the compound represented by the general formula (X) is preferably a compound represented by the general formula (X-4).

In the general formula (X-4), X ¹⁰² represents a fluorine atom or a hydrogen atom, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or 1 to 4 carbon atoms. Represents an alkoxy group.

  There are no particular restrictions on the compounds that can be combined, but it is preferable to combine one or two or more in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. Three or more It is more preferable to combine.

  Furthermore, it is preferable that the compound represented by general formula (X-4) used for the liquid-crystal composition of this invention is a compound represented by general formula (X-4-1).

In General Formula (X-4-1), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular restrictions on the compounds that can be combined, but it is preferable to combine one or two or more in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. Three or more It is more preferable to combine.

The content of the compound represented by the general formula (X-4-1) is appropriately adjusted in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like.
The content of the compound represented by the general formula (X-4-1) is preferably 1% by mass or more and 20% by mass or less, based on the total mass of the liquid crystal composition of the present invention. 15 mass% or less is preferable, 1 mass% or more and 10 mass% or less are preferable, and 1 mass% or more and less than 5 mass% are preferable.

  Furthermore, the compound represented by the general formula (X-4-1) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (42.1) to the formula (42.4). It is preferably at least one compound selected from the group, and among them, it is preferable to contain a compound represented by the formula (42.3).

  The content of the compound represented by the formula (42.3) is preferably 1 to 15% by mass, and preferably 1 to 10% by mass with respect to the total mass of the liquid crystal composition of the present invention. More preferably, it is still more preferably 1 to 5% by mass.

The compound represented by the general formula (ii) includes at least two kinds of compounds, and the compound represented by the formula (42.3) is further represented as the compound represented by the general formula (X-4-1). In the liquid crystal composition including the compound represented by the formula (i), the compound represented by the general formula (ii), and the formula (42.3) with respect to the total mass of the liquid crystal composition. 13-31 mass% is preferable, 16-28 mass% is more preferable, and 19-25 mass% is still more preferable.
In addition, in a liquid crystal composition comprising at least two kinds of compounds represented by the general formula (ii), a compound represented by the formula (42.3), and a compound represented by the formula (39.2) , With respect to the total mass of the liquid crystal composition, the compound represented by the formula (i), the compound represented by the general formula (ii), the compound represented by the formula (39.2), and the above 19-37 mass% is preferable, as for total content of the compound represented by Formula (42.3), 22-34 mass% is more preferable, and 25-31 mass% is still more preferable.

  Alternatively / further, the compound represented by the general formula (X) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (X-4-2).

In General Formula (X-4-2), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular restrictions on the compounds that can be combined, but it is preferable to combine one or two or more in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. Three or more It is more preferable to combine.

  The content of the compound represented by the general formula (X-4-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 1% by mass or more and 20% by mass or less, preferably 1% by mass or more and 15% by mass or less, preferably 1% by mass or more and 10% by mass or less, and more preferably 3% by mass or more and 7% by mass or less.

  Furthermore, the compound represented by the general formula (X-4-2) used in the liquid crystal composition of the present invention is specifically represented by the formula (42.11) to the formula (42.14). It is preferable that it is at least 1 type of compound chosen from a compound group, and it is more preferable to contain especially the compound represented by Formula (42.13) and / or Formula (42.14).

  Alternatively / further, the compound represented by the general formula (X) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (X-4-3).

In General Formula (X-4-3), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular restrictions on the compounds that can be combined, but it is preferable to combine one or two or more in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. Three or more It is more preferable to combine them.

  The content of the compound represented by the general formula (X-4-3) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 2% by mass or more and 20% by mass or less, preferably 5% by mass or more and 17% by mass or less, more preferably 10% by mass or more and 15% by mass or less, and preferably 10% by mass or more and 13% by mass or less.

  Furthermore, the compound represented by the general formula (X-4-3) used in the liquid crystal composition of the present invention is specifically represented by the formula (42.21) to the formula (42.24). It is preferable that it is at least one compound selected from the compound group, and among these, it is more preferable to contain a compound represented by the formula (42.22).

  Alternatively / further, the compound represented by the general formula (X) is preferably a compound represented by the general formula (X-5).

In the general formula ^(X-5), X ¹⁰² is a fluorine atom or a hydrogen ^{atom, R 10} is 1-4 alkyl group, the number alkenyl group or a carbon atom of 2 to 5 carbon atoms of 1 to 5 carbon atoms Represents an alkoxy group.

  There are no particular restrictions on the compounds that can be combined, but it is preferable to combine one or two or more in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. Three or more It is more preferable to combine.

  Furthermore, the compound represented by the general formula (X-5) is preferably a compound represented by the general formula (X-5-1).

In the general formula (X-5-1), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular restrictions on the compounds that can be combined, but it is preferable to combine one or two or more in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. Three or more It is more preferable to combine.

  The content of the compound represented by the general formula (X-5-1) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 2% by mass or more and 20% by mass or less, preferably 5% by mass or more and 17% by mass or less, more preferably 10% by mass or more and 15% by mass or less, and preferably 10% by mass or more and 13% by mass or less.

  Specifically, the compound represented by the general formula (X-5-1) is at least one compound selected from the group of compounds represented by formula (43.1) to formula (43.4). In particular, it is preferable to contain a compound represented by the formula (43.2).

  Alternatively / further, the compound represented by the general formula (X) is preferably a compound represented by the general formula (X-6).

In the general formula (X-6), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

The content of the compound represented by the general formula (X-6) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.
For example, the content of the compound represented by the general formula (X-6) is 1 to 25% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. 1 to 20% by weight in a form, 1 to 15% by weight in yet another embodiment, 1 to 11% by weight in yet another embodiment, and 4 to 11% by weight in yet another embodiment.

  Furthermore, the compound represented by the general formula (X-6) is specifically at least one compound selected from the group of compounds represented by formula (44.1) to formula (44.4). Among them, it is preferable to contain a compound represented by formula (44.1) and / or formula (44.2).

The content of the compound represented by the formula (44.1) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.
For example, the content of the compound represented by the formula (44.1) is preferably 0.5% by mass or more and 4% by mass or less, based on the total mass of the liquid crystal composition of the present invention. It is more preferable that the content is not less than 4% and not more than 4% by mass.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is one kind, and the compound represented by the general formula (X-6) is represented by the formula (44.1). Is further included, the compound represented by the formula (i), the compound represented by the general formula (ii), and the formula (44.1) with respect to the total mass of the liquid crystal composition. ) Is preferably 3 to 13% by mass, and more preferably 6 to 11% by mass.

  In addition, as the compound represented by the general formula (M), the compound represented by the general formula (X′-7) similar to the compound represented by the general formula (X) is used as the liquid crystal compound of the present invention. You may make it contain.

In the general formula (X′-7), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

  The content of the compound represented by the general formula (X′-7) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.

  For example, the content of the compound represented by the general formula (X′-7) is 1 to 20% by mass in one embodiment of the present invention relative to the total mass of the liquid crystal composition of the present invention, In an embodiment, it is 1 to 15% by mass, in yet another embodiment, 1 to 10% by mass, and in yet another embodiment, 1 to 5% by mass.

  Furthermore, the compound represented by general formula (X′-7) used in the liquid crystal composition of the present invention is specifically a compound group represented by formula (44.11) to formula (44.14). It is preferable that it is at least 1 type of compound chosen from these, and it is more preferable to contain the compound represented by Formula (44.13) especially.

  Alternatively / further, the compound represented by the general formula (X) is preferably a compound represented by the general formula (X-8).

In the general formula (X-8), R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

The content of the compound represented by the general formula (X-8) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.
For example, the content of the compound represented by the general formula (X-8) is 1 to 25% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. 1 to 20% by weight in a form, 1 to 15% by weight in yet another embodiment, 3 to 12% by weight in yet another embodiment, and 8 to 9% by weight in yet another embodiment.

  Furthermore, the compound represented by the general formula (X-8) is specifically at least one compound selected from the group of compounds represented by formula (44.21) to formula (44.24). Among them, it is preferable to contain a compound represented by the formula (44.22).

  Alternatively / further, the compound represented by the general formula (X) is preferably at least one compound selected from the compound group represented by the general formula (XI).

In the general formula (XI), X ¹¹¹ to X ¹¹⁷ each independently represents a fluorine atom or a hydrogen atom, at least one of X ¹¹¹ to X ¹¹⁷ represents a fluorine atom, and R ¹¹⁰ has 1 carbon atom. Represents an alkyl group of ˜5, an alkenyl group of 2 to 5 carbon atoms, or an alkoxy group of 1 to 4 carbon atoms, and Y ¹¹ represents a fluorine atom or —OCF ₃ .

  There are no particular restrictions on the compounds that can be combined, but in view of solubility at low temperatures, transition temperatures, electrical reliability, birefringence, and the like, for example, in one embodiment of the present invention, In the embodiment, it is preferable to combine two kinds, and in another embodiment, three or more kinds are combined.

The content of the compound represented by the general formula (XI) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.
For example, the content of the compound represented by the general formula (XI) is 1 to 25% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention, and yet another embodiment. 1 to 20% by weight, yet another embodiment 1 to 15% by weight, yet another embodiment 4 to 15% by weight, yet another embodiment 5 to 15% by weight, yet another In an embodiment, it is 11 to 15% by mass, in yet another embodiment, 4 to 5% by mass, and in yet another embodiment, 5 to 11% by mass.

  When the liquid crystal composition of the present invention is used for a liquid crystal display device having a small cell gap, it is suitable to increase the content of the compound represented by the general formula (XI). When used for a liquid crystal display device having a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (XI). Moreover, when used for a liquid crystal display element used in a low temperature environment, it is suitable to reduce the content of the compound represented by the general formula (XI). In the case of a liquid crystal composition used for a liquid crystal display device having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (XI).

  Furthermore, it is preferable that the compound represented by general formula (XI) used for the liquid-crystal composition of this invention is a compound represented by general formula (XI-1).

In General Formula (XI-1), R ¹¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in particular in the compound which can be combined, In consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it combines suitably for every embodiment. For example, in one embodiment of the present invention, one type is combined, in another embodiment, two types, and in another embodiment, three or more types are combined.

  The content of the compound represented by the general formula (XI-1) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. 1 to 25% by weight in one embodiment of the present invention, 1 to 20% by weight in yet another embodiment, 1 to 15% by weight in yet another embodiment, and 4 to 15 in yet another embodiment. % In yet another embodiment, 5-15% in still another embodiment, 11-15% in still another embodiment, 4-5% in yet another embodiment, 5 in yet another embodiment. To 11% by mass.

  Furthermore, the compound represented by the general formula (XI-1) used in the liquid crystal composition of the present invention is specifically from the compound group represented by the formula (45.1) to the formula (45.4). It is preferable that it is at least one compound selected, and among these, it is preferable to contain at least one compound selected from the group of compounds represented by formula (45.2) to formula (45.4). It is more preferable to contain the compound represented by 45.2).

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (45.2) is determined in consideration of solubility at low temperatures, transition temperature, electrical reliability, and the like. 1 to 25% by weight in one embodiment of the present invention, 1 to 20% by weight in yet another embodiment, 1 to 15% by weight in yet another embodiment, or even further, based on the total weight of the product. In this embodiment, it is 2 to 15% by mass, and in still another embodiment 2 to 5% by mass.

  The content of the compound represented by the formula (45.3) is appropriately adjusted in consideration of solubility at low temperature, transition temperature, electrical reliability, and the like, but is included in the liquid crystal composition of the present invention. When the compound represented by the general formula (ii) is at least two types (preferably two types), the content of the compound represented by the formula (45.3) is the amount of the liquid crystal composition of the present invention. It is preferable that it is 0.5-8 mass% with respect to the total mass, It is more preferable that it is 1-6 mass%, It is still more preferable that it is 3-5 mass%.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (45.4) is determined in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. 1 to 25% by weight in one embodiment of the present invention, 1 to 20% by weight in yet another embodiment, 1 to 15% by weight in yet another embodiment, or even further, based on the total weight of the product. 1 to 10 mass% in yet another embodiment, 2 to 7 mass% in yet another embodiment, and 2 to 3 mass% in yet another embodiment.

  Alternatively / further, the compound represented by the general formula (XI) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (XI-2).

In General Formula (XI-2), R ¹¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in particular in the compound which can be combined, In consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it combines suitably for every embodiment. For example, in one embodiment of the present invention, one type is combined, in another embodiment, two types, and in another embodiment, three or more types are combined.

  The content of the compound represented by the general formula (XI-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 1% by mass or more and 20% by mass or less, preferably 1% by mass or more and 15% by mass or less, preferably 1% by mass or more and 10% by mass or less, and more preferably 1% by mass or more and 5% by mass or less. % To 3% by mass is preferable.

  Furthermore, the compound represented by the general formula (XI-2) used in the liquid crystal composition of the present invention is specifically from the compound group represented by the formula (45.11) to the formula (45.14). It is preferable that it is at least one compound selected, and among these, it is preferable to contain at least one compound selected from the group of compounds represented by formula (45.12) to formula (45.14). It is more preferable to contain the compound represented by 45.12).

  Alternatively / further, the compound represented by the general formula (X) is preferably at least one compound selected from the group of compounds represented by the general formula (XII).

In the general formula (XII), X ^{121 to} X ¹²⁶ each independently represent a fluorine atom or a hydrogen atom, and R ¹²⁰ represents an alkyl group having 1 to 5 carbon atoms and an alkenyl group having 2 to 5 carbon atoms. Alternatively, it represents an alkoxy group having 1 to 4 carbon atoms, and Y ¹² represents a fluorine atom or —OCF ₃ .

  Although there is no particular limitation on the compounds that can be combined, it is preferable to combine 1 to 3 types as appropriate in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, and the like. It is more preferable to combine four or more types.

  Furthermore, it is preferable that the compound represented by general formula (XII) used for the liquid-crystal composition of this invention is a compound represented by general formula (XII-1).

In General Formula (XII-1), R ¹²⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no particular limitation on the compounds that can be combined, it is preferable to combine one or two or more appropriately in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, and the like. It is more preferable to combine more than one type.

  The content of the compound represented by the general formula (XII-1) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 1% by mass or more and 15% by mass or less, preferably 2% by mass or more and 10% by mass or less, preferably 3% by mass or more and 8% by mass or less, and more preferably 4% by mass or more and 6% by mass or less.

  Furthermore, the compound represented by the general formula (XII-1) used in the liquid crystal composition of the present invention is specifically from the compound group represented by the formula (46.1) to the formula (46.4). It is preferable that it is at least one compound selected, and among these, it is preferable to contain at least one compound selected from the compound group represented by formula (46.2) to formula (46.4).

  Alternatively / further, the compound represented by the general formula (XII) is preferably a compound represented by the general formula (XII-2).

In the general formula (XII-2), R ¹²⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular limitations on the compounds that can be combined, but preferably one or more types are preferably combined in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine three or more types.

  The content of the compound represented by the general formula (XII-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 1% by mass or more and 20% by mass or less, preferably 3% by mass or more and 20% by mass or less, preferably 4% by mass or more and 17% by mass or less, preferably 6% by mass or more and 15% by mass or less, and 9% by mass. % To 13% by mass is preferable.

  Furthermore, the compound represented by the general formula (XII-2) used in the liquid crystal composition of the present invention is specifically from the compound group represented by the formula (47.1) to the formula (47.4). It is preferable that it is at least one compound selected, and among them, it is preferable to contain at least one compound selected from the compound group represented by formula (47.2) to formula (47.4).

  Alternatively / further, the compound represented by the general formula (M) is preferably at least one compound selected from the group of compounds represented by the general formula (XIII).

In the general formula (XIII), X ^{131 to} X ¹³⁵ each independently represent a fluorine atom or a hydrogen atom, and R ¹³⁰ represents an alkyl group having 1 to 5 carbon atoms and an alkenyl group having 2 to 5 carbon atoms. Alternatively, it represents an alkoxy group having 1 to 4 carbon atoms, and Y ¹³ represents a fluorine atom or —OCF ₃ .

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It is preferable to contain 1-2 types from these compounds, It is more preferable to contain 1-3 types, It contains 1-4 types More preferably.

  The content of the compound represented by the general formula (XIII) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.

  For example, the content of the compound represented by the general formula (XIII) is 1 to 30% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention, and in another embodiment. 1-25% by weight, yet another embodiment 1-20% by weight, yet another embodiment 1-16% by weight, yet another embodiment 4-20% by weight, yet another embodiment. 9 to 20% by weight, yet another embodiment 13 to 20% by weight, and yet another embodiment 13 to 16% by weight.

  When the liquid crystal composition of the present invention is used for a liquid crystal display device having a small cell gap, it is suitable to increase the content of the compound represented by the general formula (XIII). When used for a liquid crystal display element with a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (XIII). In addition, when used for a liquid crystal display element used in a low temperature environment, it is suitable to reduce the content of the compound represented by the general formula (XIII). In the case of a liquid crystal composition used for a liquid crystal display device having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (XIII).

  Furthermore, the compound represented by the general formula (XIII) is preferably a compound represented by the general formula (XIII-1).

In the general formula ^{(XIII-1), R 130} represents an alkyl group, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon atoms of 1 to 5 carbon atoms.

  The compound represented by the general formula (XIII-1) is preferably contained in an amount of 1% by mass to 25% by mass with respect to the total mass of the liquid crystal composition of the present invention, and preferably 3% by mass or more and 25% by mass or less. The content is preferably 5% by mass or more and 20% by mass or less, and more preferably 10% by mass or more and 15% by mass or less.

  Further, the compound represented by the general formula (XIII-1) is preferably at least one compound selected from the group of compounds represented by the formulas (48.1) to (48.4). The compound represented by (48.2) is preferable.

  Alternatively / further, the compound represented by the general formula (XIII) is preferably a compound represented by the general formula (XIII-2).

In the general formula ^{(XIII-2), R 130} represents an alkyl group, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon atoms of 1 to 5 carbon atoms.

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It is preferable to contain 1 or 2 or more types from these compounds.

  The compound represented by the general formula (XIII-2) is preferably contained in an amount of 1% by mass to 25% by mass with respect to the total mass of the liquid crystal composition of the present invention, and preferably 1% by mass to 20% by mass. The content is preferably 1% by mass or more and 16% by mass or less, and more preferably 4% by mass or more and 16% by mass or less. Among these, it is preferable to contain 4 mass% or more and 13 mass% or less of the compound represented by the said general formula (XIII-2) with respect to the total mass of the liquid-crystal composition of this invention, 9 mass% or more and 16 quantity % Or less is preferable.

  Further, the compound represented by the general formula (XIII-2) is preferably at least one compound selected from the group of compounds represented by the formulas (49.1) to (49.4). A compound represented by (49.1) and / or the formula (49.2) is preferable.

  Alternatively / further, the compound represented by the general formula (XIII) is preferably a compound represented by the general formula (XIII-3).

In the general formula (XIII-3), R ¹³⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It is preferable to contain 1-2 types from these compounds.

  The compound represented by the general formula (XIII-3) is preferably contained in an amount of 1% by mass to 20% by mass with respect to the total mass of the liquid crystal composition of the present invention, and is preferably 1% by mass to 15% by mass. It is more preferably contained, more preferably 5% by mass to 15% by mass, still more preferably 5% by mass to 10% by mass.

  Furthermore, the compound represented by the general formula (XIII-3) is preferably at least one compound selected from the group of compounds represented by formula (50.1) to formula (50.4), A compound represented by formula (50.1) and / or formula (50.2) is preferable, and a compound represented by formula (50.1) is preferable.

  There are two or three compounds represented by the general formula (ii) contained in the liquid crystal composition of the present invention, and the compound represented by the general formula (XIII-3) is represented by the formula (50.1). When the compound represented is further contained, the content of the compound represented by the formula (50.1) is preferably 1% by mass or more and 15% by mass or less with respect to the total mass of the liquid crystal composition. More preferably, the content is greater than or equal to 15% by weight and less than or equal to 15% by weight, and even more preferably between 5% and 10% by weight.

  The compound represented by the general formula (ii) includes two or three types of compounds, and the compound represented by the general formula (XIII-3) further includes a compound represented by the formula (50.1). In the liquid crystal composition contained, the compound represented by the formula (i), the compound represented by the general formula (ii), and the formula (50.1) with respect to the total mass of the liquid crystal composition. 15-35 mass% is preferable, as for the total content of the compound represented, 17-30 mass% is more preferable, and 20-25 mass% is still more preferable.

  Alternatively / further, the compound represented by the general formula (M) is preferably a compound represented by the general formula (XIII′-1).

In the general formula (XIII′-1), R ¹³⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It is preferable to contain 1-2 types from these compounds.

  The compound represented by the general formula (XIII′-1) is preferably contained in an amount of 2% by mass or more and 20% by mass or less based on the total mass of the liquid crystal composition of the present invention. The content is preferably 9% by mass or more and 17% by mass or less, and more preferably 12% by mass or more and 15% by mass or less.

  Further, the compound represented by the general formula (XIII′-1) is preferably at least one compound selected from the group of compounds represented by formulas (50.11) to (50.14). And a compound represented by formula (50.12) and / or formula (50.14).

  Alternatively / further, the compound represented by the general formula (M) is preferably at least one compound selected from the group of compounds represented by the general formula (XIV).

In the general formula (XIV), R ¹⁴⁰ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms, and X ^{141 to} X ¹⁴⁴ are Each independently represents a fluorine atom or a hydrogen atom, Y ¹⁴ represents a fluorine atom, a chlorine atom or OCF ₃ , Q ¹⁴ represents a single bond, —COO— or —CF ₂ O—, and m ¹⁴ represents 0 or 1.

  Although there is no restriction | limiting in the kind of compound which can be combined, It combines suitably for every embodiment in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. For example, in one embodiment of the present invention, there is one. Furthermore, in another embodiment of the present invention, there are two types. Or in another embodiment of this invention, they are three types. In still another embodiment of the present invention, there are four types. Or in another embodiment of this invention, they are five types. Or in another embodiment of this invention, they are six or more types.

  The content of the compound represented by the general formula (XIV) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.

  For example, the content of the compound represented by the general formula (XIV) is 1 to 30% by mass in one embodiment of the present invention and 1 to 30% by mass with respect to the total mass of the liquid crystal composition of the present invention. 1-25% by weight in yet another embodiment, 1-20% by weight in yet another embodiment, 3-20% by weight in yet another embodiment, 5-20% by weight in yet another embodiment, yet another embodiment Is 8 to 20% by mass, and in still another embodiment, 12 to 20% by mass.

  When the liquid crystal composition of the present invention is used for a liquid crystal display device having a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (XIV). In the case of a liquid crystal composition used for a liquid crystal display device having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (XIV).

  Furthermore, the compound represented by General Formula (XIV) is preferably a compound represented by General Formula (XIV-1).

In the general formula (XIV-1), R ¹⁴⁰ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms, and Y ¹⁴ represents a fluorine atom. Represents a chlorine atom or —OCF ₃ .

  Although there is no restriction | limiting in the kind of compound which can be combined, It is preferable to combine 1-3 types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc.

  Furthermore, it is preferable that the compound represented by general formula (XIV-1) is a compound represented by general formula (XIV-1-1).

In the general formula (XIV-1-1), R ¹⁴⁰ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms.

The content of the compound represented by the general formula (XIV-1-1) is appropriately adjusted in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like.
For example, the content of the compound represented by the general formula (XIV-1-1) is 1% by mass or more and 30% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. In another embodiment, from 8% by weight to 30% by weight, in yet another embodiment from 8% by weight to 25% by weight, and in yet another embodiment from 15% by weight to 25% by weight, and yet another implementation. In the form, it is 17 mass% or more and 23 mass% or less. Among these, the content of the compound represented by the general formula (XIV-1-1) is preferably 8% by mass or more and 30% by mass with respect to the total mass of the liquid crystal composition of the present invention. It is more preferably 8% by mass or more and 25% by mass or less, still more preferably 15% by mass or more and 25% by mass or less, and particularly preferably 17% by mass or more and 23% by mass or less.

  Furthermore, the compound represented by the general formula (XIV-1-1) is specifically at least one compound selected from the group of compounds represented by the formulas (51.1) to (51.4). It is preferable that it contains a compound represented by the formula (51.1).

  The content of the compound represented by the formula (51.1) is preferably at least 8% by mass, and is 8% by mass to 25% by mass with respect to the total mass of the liquid crystal composition of the present invention. More preferably, it is more preferably 15% by mass or more and 25% by mass or less, and particularly preferably 17% by mass or more and 23% by mass or less.

  Alternatively / further, the compound represented by the general formula (XIV-1) is preferably a compound represented by the general formula (XIV-1-2).

In the general formula (XIV-1-2), R ¹⁴⁰ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms.

  The content of the compound represented by the general formula (XIV-1-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at low temperatures, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 1% by mass or more and 15% by mass or less, preferably 1% by mass or more and 10% by mass or less, preferably 1% by mass or more and 5% by mass or less, and more preferably 1% by mass or more and 3% by mass or less.

  Furthermore, the compound represented by the general formula (XIV-1-2) is specifically at least one compound selected from the group of compounds represented by formula (52.1) to formula (52.4). Among them, it is preferable to contain a compound represented by the formula (52.1).

  Alternatively / further, the compound represented by the general formula (XIV) is preferably a compound represented by the general formula (XIV-2).

In the general formula ^{(XIV-2), R 140} represents an alkyl group, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon atoms of 1 to 5 carbon ^atoms, X 141 ^{to X 144} Each independently represents a fluorine atom or a hydrogen atom, and Y ¹⁴ represents a fluorine atom, a chlorine atom or —OCF ₃ .

  Although there is no restriction | limiting in the kind of compound which can be combined, It combines suitably for every embodiment in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. For example, in one embodiment of the present invention, there is one. Furthermore, in another embodiment of the present invention, there are two types. Or in another embodiment of this invention, they are three types. In still another embodiment of the present invention, there are four types. Or in another embodiment of this invention, they are five or more types.

  The content of the compound represented by the general formula (XIV-2) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.

  For example, the content of the compound represented by the general formula (XIV-2) is 1 to 25% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. 1 to 20% by weight in a form, 1 to 15% by weight in yet another embodiment, 5 to 15% by weight in yet another embodiment, 6 to 13% by weight in yet another embodiment, and yet another In embodiments, it is 8-13% by weight, in yet another embodiment 6-8% by weight, and in yet another embodiment 10-12% by weight.

  When the liquid crystal composition of the present invention is used for a liquid crystal display element having a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (XIV-2). In the case of a liquid crystal composition used for a liquid crystal display device having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (XIV-2).

  Furthermore, it is preferable that the compound represented by general formula (XIV-2) is a compound represented by general formula (XIV-2-1).

In the general formula (XIV-2-1), R ¹⁴⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  The content of the compound represented by the general formula (XIV-2-1) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 1% by mass to 15% by mass, preferably 3% by mass to 13% by mass, more preferably 5% by mass to 11% by mass, and preferably 7% by mass to 9% by mass.

  Furthermore, the compound represented by the general formula (XIV-2-1) is specifically at least one compound selected from the group of compounds represented by the formula (53.1) to the formula (53.4). Among them, it is preferable to contain a compound represented by the formula (53.4).

  Alternatively / further, the compound represented by the general formula (XIV-2) is preferably a compound represented by the general formula (XIV-2-2).

In the general formula (XIV-2-2), R ¹⁴⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  The content of the compound represented by the general formula (XIV-2-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 1% by mass or more and 25% by mass or less, more preferably 1% by mass or more and 20% by mass or less, still more preferably 3% by mass or more and 18% by mass or less, and more preferably 9% by mass or more and 15% by mass or less. Is particularly preferred.

  Furthermore, the compound represented by the general formula (XIV-2-2) is specifically at least one compound selected from the compound group represented by the formula (54.1) to the formula (54.4). Among them, it is preferable to contain a compound represented by the formula (54.2) and / or the formula (54.4).

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (54.2) is preferably 1% by mass or more and 20% by mass or less based on the total mass of the liquid crystal composition of the present invention. It is more preferably 1% by mass or less and 15% by mass or less, still more preferably 1% by mass or more and 10% by mass or less, and particularly preferably 5% by mass or more and 10% by mass or less.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (54.4) is preferably 1% by mass or more and 20% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. It is more preferably 1% by mass or less and 15% by mass or less, still more preferably 1% by mass or more and 10% by mass or less, and particularly preferably 3% by mass or more and 8% by mass or less.

  Only one type of compound is included as the compound represented by the general formula (ii), and the compound represented by the formula (54.2) as the compound represented by the general formula (XIV-2-2) In the liquid crystal composition containing the compound represented by the formula (54.4), the compound represented by the formula (i) and the general formula (ii) with respect to the total mass of the liquid crystal composition. The total content of the compound represented by formula (54.2) and the compound represented by formula (54.4) is preferably 17 to 35% by mass. More preferably, it is mass%, and it is still more preferable that it is 23-29 mass%.

  Alternatively / further, the compound represented by the general formula (XIV-2) is preferably a compound represented by the general formula (XIV-2-3).

In the general formula (XIV-2-3), R ¹⁴⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  The content of the compound represented by the general formula (XIV-2-3) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at low temperatures, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 5% by mass to 30% by mass, preferably 9% by mass to 27% by mass, more preferably 12% by mass to 24% by mass, and preferably 12% by mass to 20% by mass.

  Furthermore, the compound represented by the general formula (XIV-2-3) is specifically at least one compound selected from the group of compounds represented by the formulas (55.1) to (55.4). Among them, it is preferable to contain a compound represented by formula (55.2) and / or formula (55.4).

  Alternatively / further, the compound represented by the general formula (XIV-2) is preferably a compound represented by the general formula (XIV-2-4).

In the general formula (XIV-2-4), R ¹⁴⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although there is no restriction | limiting in the kind of compound which can be combined, It combines suitably for every embodiment in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. For example, in one embodiment of the present invention, there is one. Furthermore, in another embodiment of the present invention, there are two types. Or in another embodiment of this invention, they are three or more types.

  The content of the compound represented by the general formula (XIV-2-4) is appropriately determined for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. Adjusted.

  For example, the content of the compound represented by the general formula (XIV-2-4) is 1 to 25% by mass in one embodiment of the present invention relative to the total mass of the liquid crystal composition of the present invention. 1 to 20% by weight in yet another embodiment, 1 to 15% by weight in yet another embodiment, 1 to 10% by weight in yet another embodiment, 3 to 10% by weight in yet another embodiment, and still more In another embodiment, it is 6-8% by weight.

  When the liquid crystal composition of the present invention is used for a liquid crystal display device having a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (XIV-2-4). In the case of a liquid crystal composition used for a liquid crystal display device having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (XIV-2-4).

  Furthermore, the compound represented by the general formula (XIV-2-4) is specifically at least one compound selected from the group of compounds represented by formula (56.1) to formula (56.4). It is preferable that a compound represented by the formula (56.1), the formula (56.2), and / or the formula (56.4) is preferably contained, and the formula (56.2) It is preferable to contain the compound.

  Alternatively / further, the compound represented by the general formula (XIV-2) is preferably a compound represented by the general formula (XIV-2-5).

In the general formula (XIV-2-5), R ¹⁴⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  The content of the compound represented by the general formula (XIV-2-5) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at low temperatures, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 5% by mass or more and 25% by mass or less, preferably 10% by mass or more and 22% by mass or less, preferably 13% by mass or more and 18% by mass or less, and more preferably 13% by mass or more and 15% by mass or less.

  Furthermore, the compound represented by the general formula (XIV-2-5) is specifically at least one compound selected from the group of compounds represented by formula (57.1) to formula (57.4). is there. Among these, it is preferable to contain a compound represented by the formula (57.1).

  Alternatively / further, the compound represented by General Formula (XIV-2) is preferably a compound represented by General Formula (XIV-2-6).

In the general formula (XIV-2-6), R ¹⁴⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  The content of the compound represented by the general formula (XIV-2-6) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. On the other hand, it is preferably 5% by mass or more and 25% by mass or less, preferably 10% by mass or more and 22% by mass or less, preferably 15% by mass or more and 20% by mass or less, and more preferably 15% by mass or more and 17% by mass or less.

  Furthermore, the compound represented by the general formula (XIV-2-6) is specifically at least one compound selected from the group of compounds represented by formula (58.1) to formula (58.4). It is preferable that there is a compound represented by the formula (58.2).

  Alternatively / further, the compound represented by the general formula (XIV) is preferably a compound represented by the general formula (XIV-3).

In the general formula (XIV-3), R ¹⁴⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, it is two or more types.

  The content of the compound represented by the general formula (XIV-3) is the total mass of the liquid crystal composition of the present invention in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like. Is preferably 2.5% by mass or more and 25% by mass or less, more preferably 3% by mass or more and 15% by mass or less, and preferably 3% by mass or more and 10% by mass or less.

  Furthermore, the compound represented by the general formula (XIV-3) is specifically at least one compound selected from the group of compounds represented by formula (61.1) to formula (61.4). It is preferable, and the compound represented by Formula (61.1) and / or Formula (61.2) is more preferable.

  Alternatively / further, the compound represented by the general formula (M) is preferably a compound represented by the general formula (XV).

In the general formula (XV), R ¹⁵⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and A ¹⁵¹ represents 1,4- It represents a cyclohexylene group or a 1,4-phenylene group, and the hydrogen atom on the 1,4-phenylene group may be substituted with a fluorine atom.

  There are no particular limitations on the compounds that can be combined, but they are combined as appropriate in consideration of solubility at low temperatures, transition temperatures, electrical reliability, birefringence, and the like. For example, in one embodiment of the present invention, there is one. In another embodiment of the present invention, there are two types. In yet another embodiment, there are three types. In still another embodiment, there are four types. In still another embodiment, there are five or more types.

  The content of the compound represented by the general formula (XV) is appropriately adjusted for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. For example, the content of the compound represented by the general formula (XV) is 1 to 25% by mass in one embodiment of the present invention and 1 to 25% by mass with respect to the total mass of the liquid crystal composition of the present invention. 1 to 20% by weight, in yet another embodiment 1 to 15% by weight, in yet another embodiment 5 to 15% by weight, and in yet another embodiment 8 to 9% by weight.

  The compound represented by the general formula (XV) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (XV-1).

In the general formula (XV-1), R ¹⁵⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

  The content of the compound represented by the general formula (XV-1) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.

  For example, the content of the compound represented by the general formula (XV-1) is 1 to 25% by mass in one embodiment of the present invention relative to the total mass of the liquid crystal composition of the present invention. 1 to 20% by weight in a form, 1 to 10% by weight in yet another embodiment, 3 to 10% by weight in yet another embodiment, 4 to 7% by weight in yet another embodiment, and yet another In an embodiment, it is 1 to 5% by mass, and in still another embodiment, 5 to 10% by mass.

  Furthermore, the compound represented by the general formula (XV-1) used in the liquid crystal composition of the present invention is specifically from the compound group represented by the formula (59.1) to the formula (59.4). It is preferable that it is at least one compound selected, and among these, it is more preferable to contain a compound represented by the formula (59.2).

  Alternatively / further, the compound represented by the general formula (XV) is preferably a compound represented by the general formula (XV-2).

In the general formula (XV-2), R ¹⁵⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

  The content of the compound represented by the general formula (XV-2) is appropriately adjusted in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence.

  For example, the content of the compound represented by the general formula (XV-2) is determined in consideration of solubility at a low temperature, transition temperature, electrical reliability, birefringence, and the like. Is preferably 1% by mass or more and 20% by mass or less, more preferably 1% by mass or more and 15% by mass or less, and preferably 5% by mass or more and 15% by mass or less. It is preferable that they are 9 mass% or less.

  Furthermore, the compound represented by the general formula (XV-2) used in the liquid crystal composition of the present invention is specifically from the compound group represented by the formula (60.1) to the formula (60.4). It is preferable that it is at least one compound selected, and among these, it is more preferable to contain a compound represented by formula (60.1) and / or formula (60.2).

  In the liquid crystal composition containing 2 to 3 types of compounds as the compound represented by the general formula (ii), the compound represented by the general formula (XV-2) is represented by the formula (60.1). It is preferable that the compound and the compound represented by said Formula (60.2) are contained. With respect to the total mass of the liquid crystal composition, the compound represented by the formula (i), the compound represented by the general formula (ii), the compound represented by the formula (60.1), and the formula The total content of the compound represented by (60.2) is preferably 15 to 33% by mass, more preferably 18 to 30% by mass, and even more preferably 21 to 27% by mass. preferable.

  The liquid crystal composition of the present invention can further contain a compound represented by the general formula (XVI) having a structure similar to the general formula (M) as a chiral agent.

In the general formula (XVI), R ¹⁶⁰ represents an alkyl group having 9 or 10 carbon atoms, X ^{161 to} X ¹⁶³ represent a hydrogen atom or a fluorine atom, and K ¹⁶⁰ represents a single bond or —CH ₂ CH ₂ —. P ¹⁶⁰ represents 1, 2, or 3.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, it is two or more types.

  The content of the compound represented by the general formula (XVI) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, birefringence, and the like. It is preferably 2.5% by mass or more and 25% by mass or less, preferably 3% by mass or more and 15% by mass or less, and more preferably 3% by mass or more and 10% by mass or less.

  Furthermore, the compound represented by the general formula (XVI) is specifically at least one compound selected from the group of compounds represented by formula (62.1) to formula (62.3). A compound represented by formula (62.1) and / or formula (62.2) is preferable.

  It is preferable to adjust the content of the compound represented by the formula (62.1) according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. It is preferable to contain 0.1-1 mass% with respect to the gross mass of the liquid-crystal composition of this invention, and it is more preferable to contain 0.1-0.5 mass%.

  It is preferable to adjust the content of the compound represented by the above formula (62.2) according to required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Is preferably 0.1 to 1% by mass, more preferably 0.1 to 0.5% by mass, and preferably 0.1 to 0.3% by mass with respect to the total mass of the liquid crystal composition of the present invention. It is preferable to contain 0.1 to 0.2 mass%.

  The liquid crystal composition of the present invention preferably does not contain a compound having a structure in which oxygen atoms such as a peracid (—CO—OO—) structure are bonded in the molecule.

  When importance is attached to the reliability and long-term stability of the liquid crystal composition, the content of the compound having a carbonyl group is preferably 5% by mass or less with respect to the total mass of the composition, and 3% by mass or less. More preferably, it is more preferable to set it as 1 mass% or less, and it is most preferable not to contain substantially.

  When importance is attached to stability by UV irradiation, the content of the compound substituted with chlorine atoms is preferably 15% by mass or less, more preferably 10% by mass or less, based on the total mass of the composition. Preferably, it is more preferable to set it as 5 mass% or less, and it is most preferable not to contain substantially.

  It is preferable to increase the content of a compound in which all the ring structures in the molecule are 6-membered rings, and the content of the compound in which all the ring structures in the molecule are 6-membered rings is 80 It is preferably at least mass%, more preferably at least 90 mass%, even more preferably at least 95 mass%, and the liquid crystal is composed only of a compound having substantially all 6-membered ring structures in the molecule. Most preferably it constitutes a composition.

  In order to suppress deterioration due to oxidation of the liquid crystal composition, it is preferable to reduce the content of the compound having a cyclohexenylene group as a ring structure, and the content of the compound having a cyclohexenylene group is determined based on the total mass of the composition. The content is preferably 10% by mass or less, more preferably 5% by mass or less, and still more preferably substantially not contained.

  When importance is attached to improvement of viscosity and improvement of Tni, the content of a compound having a 2-methylbenzene-1,4-diyl group in the molecule, in which a hydrogen atom may be substituted with a halogen, may be reduced. Preferably, the content of the compound having a 2-methylbenzene-1,4-diyl group in the molecule is preferably 10% by mass or less, and preferably 5% by mass or less based on the total mass of the composition. Is more preferable, and it is still more preferable not to contain substantially.

  When the compound contained in the composition of the first embodiment of the present invention has an alkenyl group as a side chain, when the alkenyl group is bonded to cyclohexane, the alkenyl group has 2 to 5 carbon atoms. When the alkenyl group is bonded to benzene, the alkenyl group preferably has 4 to 5 carbon atoms, and the unsaturated bond of the alkenyl group and benzene are directly bonded. Preferably not.

  The liquid crystal composition of the present invention may contain a polymerizable compound in order to produce a liquid crystal display element such as a PS mode, a lateral electric field type PSA mode, or a lateral electric field type PSVA mode. Examples of the polymerizable compound that can be used include a photopolymerizable monomer that undergoes polymerization by energy rays such as light. The structure has, for example, a liquid crystal skeleton in which a plurality of six-membered rings such as biphenyl derivatives and terphenyl derivatives are connected. Examples thereof include a polymerizable compound. More specifically, a bifunctional monomer represented by the general formula (XX) is preferable.

In the general formula (XX), X ²⁰¹ and X ²⁰² each independently represent a hydrogen atom or a methyl group,
Sp ²⁰¹ and Sp ²⁰² each independently represent a single bond, an alkylene group having 1 to 8 carbon atoms, or —O— (CH ₂ ) _s — (wherein s represents an integer of 2 to 7, Represents an aromatic ring)),
Z ²⁰¹ represents —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —CF ₂ O—, —OCF ₂ —, —CH ₂ CH ₂ —, —CF ₂ CF ₂ —, —CH = CH-COO -, - CH = CH-OCO -, - COO-CH = CH -, - OCO-CH = CH -, - COO-CH 2 CH 2 -, - OCO-CH 2 CH 2 -, - CH ₂ CH ₂ —COO—, —CH ₂ CH ₂ —OCO—, —COO—CH ₂ —, —OCO—CH ₂ —, —CH ₂ —COO—, —CH ₂ —OCO—, —CY ¹ = CY ² -(Wherein Y ¹ and Y ² each independently represents a fluorine atom or a hydrogen atom), -C≡C-, or a single bond;
M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond, and all of the 1,4-phenylene groups in the formula have an arbitrary hydrogen atom substituted by a fluorine atom. May be.

X ²⁰¹ and X ²⁰² are each preferably a diacrylate derivative that represents a hydrogen atom, or a dimethacrylate derivative that has a methyl group, and a compound in which one represents a hydrogen atom and the other represents a methyl group. As for the polymerization rate of these compounds, diacrylate derivatives are the fastest, dimethacrylate derivatives are slow, asymmetric compounds are in the middle, and a preferred embodiment can be used depending on the application. In the PSA display element, a dimethacrylate derivative is particularly preferable.

Sp ²⁰¹ and Sp ²⁰² each independently represent a single bond, an alkylene group having 1 to 8 carbon atoms, or —O— (CH ₂ ) _s —, but in the PSA display element, at least one is a single bond. A compound in which both represent a single bond or one represents a single bond and the other represents an alkylene group having 1 to 8 carbon atoms or —O— (CH ₂ ) _s — is preferable. In this case, an alkyl group having 1 to 4 carbon atoms is preferable, and s is preferably 1 to 4.

Z ²⁰¹ represents —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —CF ₂ O—, —OCF ₂ —, —CH ₂ CH ₂ —, —CF ₂ CF ₂ —, or A single bond is preferable, —COO—, —OCO—, or a single bond is more preferable, and a single bond is particularly preferable.

M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group, or a single bond in which an arbitrary hydrogen atom may be substituted with a fluorine atom. A single bond is preferred. When M ²⁰¹ represents a ring structure other than a single bond, Z ²⁰¹ is preferably a linking group other than a single bond, and when M ²⁰¹ is a single bond, Z ²⁰¹ is preferably a single bond.

From these points, in general formula (XX), the ring structure between Sp ²⁰¹ and Sp ²⁰² is specifically preferably the structure described below.

In the general formula (XX), when M ²⁰¹ represents a single bond and the ring structure is formed of two rings, it is preferable to represent the following formulas (XXa-1) to (XXa-5), It is more preferable to represent formula (XXa-1) to formula (XXa-3), and it is particularly preferable to represent formula (XXa-1).

In the formula (XXa-1) to the formula (XXa-5), both ends are bonded to Sp ²⁰¹ or Sp ²⁰² .

  The polymerizable compounds containing these skeletons are optimal for PSA-type liquid crystal display elements because of the alignment regulating power after polymerization, and a good alignment state can be obtained, so that display unevenness is suppressed or does not occur at all.

  In view of the above, the polymerizable monomer is preferably at least one compound selected from the group of compounds represented by general formula (XX-1) to general formula (XX-4), among which general formula (XX- The compound represented by 2) is more preferable.

In the general formula (XX-3) and the general formula (XX-4), Sp ²⁰ represents an alkylene group having 2 to 5 carbon atoms.

  In the case of adding a monomer to the liquid crystal composition of the present invention, the polymerization proceeds even when no polymerization initiator is present, but may contain a polymerization initiator in order to accelerate the polymerization. Examples of the polymerization initiator include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides, and the like.

  The liquid crystal composition of the present invention can further contain a compound represented by the general formula (Q) as an antioxidant.

In the general formula (Q), R ^Q represents a straight-chain alkyl group or branched alkyl group having 1 to 22 carbon atoms, one or two or more CH ₂ groups in the alkyl group, an oxygen atom May be substituted with —O—, —CH═CH—, —CO—, —OCO—, —COO—, —C≡C—, —CF ₂ O—, —OCF ₂ — so that they are not directly adjacent; ^MQ represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group, or a single bond.

R ^Q represents a straight-chain alkyl group or branched alkyl group having 1 to 22 carbon atoms, one or two or more CH ₂ groups in the alkyl groups, so that oxygen atoms are not directly adjacent, -O -, - CH = CH -, - CO -, - OCO -, - COO -, - C≡C -, - CF 2 O -, - OCF 2 - may be substituted with, but having 1 to 20 carbon atoms Linear alkyl group, linear alkoxy group, linear alkyl group in which one CH ₂ group is substituted by —OCO— or —COO—, branched alkyl group, branched alkoxy group, one CH ₂ group is —OCO— Or a branched alkyl group substituted with —COO—, a linear alkyl group having 1 to 10 carbon atoms, a linear alkyl group in which one CH ₂ group is substituted with —OCO— or —COO—, branched A chain alkyl group, a branched alkoxy group, one CH ₂ group is —O A branched alkyl group substituted with CO- or -COO- is more preferable.
^MQ represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a single bond, and a trans-1,4-cyclohexylene group or a 1,4-phenylene group is preferable.

  The compound represented by the general formula (Q) is preferably at least one compound selected from the group of compounds represented by the following general formula (Qa) to general formula (Qd). More preferably, it is a compound represented by the general formula (Qa) and / or (Qc).

In the above formula, R ^Q1 is preferably a linear alkyl group or branched alkyl group having 1 to 10 carbon atoms, R ^Q2 is preferably a linear alkyl group or branched alkyl group having 1 to 20 carbon atoms, and R ^Q3 Is preferably a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group, a linear alkoxy group or a branched alkoxy group, and L ^Q is a linear alkylene group having 1 to 8 carbon atoms or a branched alkylene group. preferable. Among these, it is preferable that the compound represented by general formula (Q) is a compound represented by the following formula (Qa-1) and / or (Qc-1).

  In the liquid crystal composition of the present invention, the compound represented by the general formula (Q) preferably contains 1 type or 2 types, more preferably 1 type to 5 types, and the content thereof is It is preferably 0.001 to 1% by mass, preferably 0.001 to 0.1% by mass, and 0.001 to 0.05% by mass with respect to the total mass of the liquid crystal composition of the present invention. It is preferable that

  There are two or three compounds represented by the general formula (ii) contained in the liquid crystal composition of the present invention, and at least one compound represented by the general formula (I-1-2) In the liquid crystal composition further comprising at least one compound represented by the general formula (XIII-3), the compound represented by the formula (i) relative to the total mass of the liquid crystal composition, the general formula The total content of the compound represented by (ii), the compound represented by the general formula (I-1-2), and the compound represented by the general formula (XIII-3) is 55 to 70% by mass. Is preferable, 57-68 mass% is more preferable, and 60-65 mass% is still more preferable.

  There are two or three compounds represented by the general formula (ii) contained in the liquid crystal composition of the present invention, and at least one compound represented by the general formula (I-1-2) In the liquid crystal composition further comprising at least one compound represented by the general formula (X-2-1), the compound represented by the formula (i) with respect to the total mass of the liquid crystal composition, The total content of the compound represented by the general formula (ii), the compound represented by the general formula (I-1-2), and the compound represented by the general formula (X-2-1) is 60 -80 mass% is preferable, 62-78 mass% is more preferable, 65-75 mass% is still more preferable.

  There are two or three compounds represented by the general formula (ii) contained in the liquid crystal composition of the present invention, and at least one compound represented by the general formula (I-1-2) In the liquid crystal composition further comprising at least one compound represented by the general formula (IX-2-1) and at least one compound represented by the general formula (X-1-1), The compound represented by the formula (i), the compound represented by the general formula (ii), the compound represented by the general formula (I-1-2), the general formula, relative to the total mass of the liquid crystal composition The total content of the compound represented by (IX-2-1) and the compound represented by the general formula (X-1-1) is preferably 80 to 95% by mass, and 82 to 93% by mass. More preferably, 85-90 mass% is still more preferable.

  There are two or three compounds represented by the general formula (ii) contained in the liquid crystal composition of the present invention, and at least one compound represented by the general formula (I-1-2) In the liquid crystal composition further comprising at least one compound represented by the general formula (X-2-1) and at least one compound represented by the general formula (X-4-1), The compound represented by the formula (i), the compound represented by the general formula (ii), the compound represented by the general formula (I-1-2), the general formula, relative to the total mass of the liquid crystal composition The total content of the compound represented by (X-2-1) and the compound represented by the general formula (X-4-1) is preferably 65 to 85% by mass, and 70 to 80% by mass. More preferably, 73-78 mass% is still more preferable.

  There are two or three compounds represented by the general formula (ii) contained in the liquid crystal composition of the present invention, and at least one compound represented by the general formula (I-1-2) At least one compound represented by the general formula (IX-1-1), at least one compound represented by the general formula (IX-2-2), and the general formula (IX-2-5) And a compound represented by the general formula (ii) with respect to the total mass of the liquid crystal composition, the liquid crystal composition further comprising at least one compound represented by A compound represented by the general formula (I-1-2), a compound represented by the general formula (IX-1-1), a compound represented by the general formula (IX-2-2), and The total content of the compound represented by the general formula (IX-2-5) is 60 to Preferably 5 wt%, more preferably from 63 to 72 wt%, even more preferably from 65 to 70 wt%.

  There are two or three compounds represented by the general formula (ii) contained in the liquid crystal composition of the present invention, and at least one compound represented by the general formula (I-1-2) In the liquid crystal composition further comprising at least one compound represented by the general formula (X-1-1) and at least one compound represented by the general formula (XI-1), the liquid crystal composition The compound represented by the formula (i), the compound represented by the general formula (ii), the compound represented by the general formula (I-1-2), the general formula (X) The total content of the compound represented by (1-1-1) and the compound represented by the general formula (XI-1) is preferably 70 to 90% by mass, more preferably 72 to 85% by mass, and 74 -82 mass% is still more preferable.

  There are two or three compounds represented by the general formula (ii) contained in the liquid crystal composition of the present invention, and at least one compound represented by the general formula (I-1-2) In the liquid crystal composition further comprising the compound represented by the formula (2.5), the compound represented by the formula (i) relative to the total mass of the liquid crystal composition, represented by the general formula (ii) The total content of the compound represented by formula (I-1-2) and the compound represented by formula (2.5) is preferably 70 to 90% by mass, 85 mass% is more preferable, and 75-82 mass% is still more preferable.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is three kinds of compounds represented by the general formula (ii-1), and represented by the general formula (XIII-3). At least one (preferably one) compound, at least one (preferably one) compound represented by the general formula (XIV-1), a compound represented by the formula (62.1) , And at least one (preferably one) compound represented by the general formula (Qc), further represented by the formula (i) relative to the total mass of the liquid crystal composition. A compound represented by the general formula (ii), a compound represented by the general formula (XIII-3), a compound represented by the general formula (XIV-1), the formula (62.1) And a compound represented by the general formula The total content of Q-c) compounds represented by is preferably from 18 to 32 wt%, more preferably from 20 to 30 wt%, even more preferably from 23 to 27 wt%.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is two kinds of compounds represented by the general formula (ii-1), and the general formula (X-2-1) In the liquid crystal composition further comprising at least one (preferably one) compound represented by the formula and at least one (preferably one) compound represented by the general formula (Qc), the liquid crystal The compound represented by the formula (i), the compound represented by the general formula (ii), the compound represented by the general formula (X-2-1), and the general formula with respect to the total mass of the composition 13-28 mass% is preferable, as for total content of the compound represented by (Qc), 15-25 mass% is more preferable, and 18-22 mass% is still more preferable.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is two kinds of compounds represented by the general formula (ii-1), and the general formula (IX-2-1) In a liquid crystal composition further comprising at least one (preferably two) compound represented by formula (1) and the compound represented by formula (12.4), the formula (i) relative to the total mass of the liquid crystal composition ), The compound represented by the general formula (ii), the compound represented by the general formula (IX-2-1), and the compound represented by the formula (12.4) 30-45 mass% is preferable, as for content, 33-42 mass% is more preferable, and 35-39 mass% is still more preferable.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is two kinds of compounds represented by the general formula (ii-1), and the general formula (X-2-1) In a liquid crystal composition further comprising at least one (preferably one) compound represented by the formula and at least one (preferably one) compound represented by the general formula (X-4-1): The compound represented by the formula (i), the compound represented by the general formula (ii), the compound represented by the general formula (X-2-1), and the total mass of the liquid crystal composition, 20-35 mass% is preferable, as for total content of the compound represented by general formula (X-4-1), 23-32 mass% is more preferable, and 25-30 mass% is still more preferable.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is two kinds of compounds represented by the general formula (ii-1), and represented by the general formula (II-2). In the liquid crystal composition further comprising at least one (preferably one) compound and at least one (preferably one) compound represented by the general formula (IX-2-2), The compound represented by the formula (i), the compound represented by the general formula (ii), the compound represented by the general formula (II-2), and the general formula (IX) with respect to the total mass of the composition The total content of the compound represented by -2-2) is preferably 35 to 50% by mass, more preferably 38 to 47% by mass, and still more preferably 40 to 45% by mass.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is two kinds of compounds represented by the general formula (ii-1), and represented by the general formula (II-2). At least one (preferably one) compound, a compound represented by the formula (12.4), and at least one (preferably one) represented by the general formula (Qa) In the liquid crystal composition further including a compound and not including the compound represented by the formula (2.5), the compound represented by the formula (i) with respect to the total mass of the liquid crystal composition, the general formula The compound represented by (ii), the compound represented by the general formula (II-2), the compound represented by the formula (12.4), and the compound represented by the general formula (Qa) The total content of is preferably 35 to 45% by mass, and 38 to 47% by mass. Ri Preferably, even more preferably from 40 to 45 wt%.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is two kinds of compounds represented by the general formula (ii-1), and represented by the general formula (II-2). At least one (preferably one) compound, a compound represented by the formula (2.5), a compound represented by the formula (12.4), and the general formula (Qa) In a liquid crystal composition further comprising at least one (preferably one) compound represented, the compound represented by the formula (i) relative to the total mass of the liquid crystal composition, the general formula (ii) A compound represented by formula (II-2), a compound represented by formula (2.5), a compound represented by formula (12.4), and the formula ( The total content of the compound represented by Qa) is preferably 67 to 83% by mass. Ku, more preferably 70 to 80 wt%, even more preferably from 73 to 77 wt%.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is two kinds of compounds represented by the general formula (ii-1), and represented by the general formula (II-2). At least one (preferably one) compound, a compound represented by the formula (2.5), and a compound represented by the formula (12.4) are further included. In the liquid crystal composition not including the compound represented by -a), the compound represented by the formula (i), the compound represented by the general formula (ii), the general formula, relative to the total mass of the liquid crystal composition The total content of the compound represented by Formula (II-2), the compound represented by Formula (2.5), and the compound represented by Formula (12.4) is 75 to 88% by mass. Preferably, 77 to 85% by mass is more preferable, and 79 to 83% by mass is even more preferable. There.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is two kinds of compounds represented by the general formula (ii-2), and is represented by the general formula (Qa). In the liquid crystal composition further including at least one (preferably one) compound, the content of the compound represented by the general formula (Qa) with respect to the total mass of the liquid crystal composition is 0. 01-1 mass% is preferable, 0.01-0.5 mass% is more preferable, and 0.02-0.1 mass% is still more preferable.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is one kind of compound represented by the general formula (ii-2), and represented by the general formula (I-2). At least one (preferably one) compound, at least one (preferably one) compound represented by the general formula (I-5), represented by the general formula (II-2) At least one (preferably two) compound, at least one (preferably one) compound represented by the general formula (IX-2-2), represented by the general formula (X-3-1) In the liquid crystal composition further comprising at least one (preferably one) compound and at least one (preferably one) compound represented by the general formula (X-6), For the total mass of the object, the above formula (i A compound represented by general formula (ii), a compound represented by general formula (I-2), a compound represented by general formula (I-5), II-2), the compound represented by the general formula (IX-2-2), the compound represented by the general formula (X-3-1), and the general formula (X-6) ) Is preferably 53 to 65% by mass, more preferably 55 to 63% by mass, and even more preferably 57 to 61% by mass.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is one kind of compound represented by the general formula (ii-1), and the general formula (IXV-2-2) In a liquid crystal composition further comprising at least one (preferably two) compound represented by formula (i), the compound represented by the formula (i) relative to the total mass of the liquid crystal composition, the general formula (ii) The total content of the compound represented by general formula (IXV-2-2) is preferably 20 to 33% by mass, more preferably 22 to 30% by mass, and 24 to 28% by mass. Is even more preferable.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is one kind of compound represented by the general formula (ii-2), and represented by the general formula (II-2). At least one (preferably one) compound, at least one (preferably one) compound represented by the general formula (IX-2-2), and the general formula (X-6) In the liquid crystal composition further comprising at least one (preferably two) compound represented, and not including the compound represented by the general formula (I-2), the total mass of the liquid crystal composition, The compound represented by the formula (i), the compound represented by the general formula (ii), the compound represented by the general formula (II-2), and the general formula (IX-2-2). And the total number of compounds represented by the general formula (X-6) Yuryou is preferably 30 to 45 wt%, more preferably 33-43 wt%, even more preferably from 35 to 40 wt%.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is one kind of compound represented by the general formula (ii-1), and represented by the general formula (I-5). In the liquid crystal composition further comprising at least one (preferably one) compound and at least one (preferably two) compound represented by the general formula (II-2), The compound represented by the formula (i), the compound represented by the general formula (ii), the compound represented by the general formula (I-5), and the general formula (II- The total content of the compound represented by 2) is preferably 35 to 50% by mass, more preferably 38 to 48% by mass, and still more preferably 40 to 45% by mass.

  The compound represented by the general formula (ii) contained in the liquid crystal composition of the present invention is one kind of compound represented by the general formula (ii-1), and represented by the general formula (I-2). At least one (preferably three) compound, at least one (preferably two) compound represented by the general formula (IX-2-3), and the general formula (XIV-1) In a liquid crystal composition further comprising at least one (preferably one) compound represented, the compound represented by the formula (i) relative to the total mass of the liquid crystal composition, the general formula (ii) Of the compound represented by the general formula (I-2), the compound represented by the general formula (IX-2-3), and the compound represented by the general formula (XIV-1). The total content is preferably 65 to 80% by mass, 68 More preferably 78% by mass, even more preferably from 70 to 75 wt%.

<Liquid crystal display element>
The liquid crystal composition containing the polymerizable compound of the present invention is provided with liquid crystal alignment ability by polymerizing the polymerizable compound contained therein by ultraviolet irradiation, and transmits light through the birefringence of the liquid crystal composition. It is used in a liquid crystal display element that controls As liquid crystal display elements, ECB-LCD, VA-LCD, VA-IPS-LCD, FFS-LCD, AM-LCD (active matrix liquid crystal display element), TN (nematic liquid crystal display element), STN-LCD (super twisted nematic liquid crystal) Display element), OCB-LCD, and IPS-LCD (in-plane switching liquid crystal display element), it is particularly useful for AM-LCD, and can be used for transmissive or reflective liquid crystal display elements.

  The two substrates of the liquid crystal cell used in the liquid crystal display element can be made of a transparent material having flexibility such as glass or plastic, and one of them can be an opaque material such as silicon. A transparent substrate having a transparent electrode layer can be obtained, for example, by sputtering indium tin oxide (ITO) on a transparent substrate such as a glass plate.

  The color filter can be produced by, for example, a pigment dispersion method, a printing method, an electrodeposition method, or a dyeing method. A method for producing a color filter by a pigment dispersion method will be described as an example. A curable coloring composition for a color filter is applied on the transparent substrate, subjected to patterning treatment, and cured by heating or light irradiation. By performing this process for each of the three colors red, green, and blue, a pixel portion for a color filter can be manufactured. In addition, a pixel electrode provided with an active element such as a TFT or a thin film diode may be provided on the substrate.

  The said board | substrate is made to oppose so that a transparent electrode layer may become an inner side. In that case, you may adjust the space | interval of a board | substrate through a spacer. At this time, it is preferable to adjust so that the thickness of the light control layer obtained may be set to 1-100 micrometers. More preferably, the thickness is 1.5 to 10 μm. When a polarizing plate is used, it is preferable to adjust the product of the refractive index anisotropy Δn of the liquid crystal and the cell thickness d so that the contrast is maximized. In addition, when there are two polarizing plates, the polarizing axis of each polarizing plate can be adjusted so that the viewing angle and contrast are good. Furthermore, a retardation film for widening the viewing angle can also be used. Examples of the spacer include columnar spacers made of glass particles, plastic particles, alumina particles, a photoresist material, and the like. Thereafter, a sealant such as an epoxy thermosetting composition is screen-printed on the substrates with a liquid crystal inlet provided, the substrates are bonded together, and heated to thermally cure the sealant.

  As a method of sandwiching the polymerizable compound-containing liquid crystal composition between the two substrates, a normal vacuum injection method or an ODF method can be used. However, in the vacuum injection method, there is a problem that an injection mark remains instead of a drop mark. In this invention, it can use more suitably for the display element manufactured using ODF method. In the ODF liquid crystal display device manufacturing process, a sealant such as epoxy photothermal curing is drawn on a backplane or frontplane substrate using a dispenser in a closed-loop bank shape, and then removed. A liquid crystal display element can be manufactured by bonding a front plane and a back plane after dropping a predetermined amount of the liquid crystal composition in the air. The liquid crystal composition of the present invention can be preferably used because the liquid crystal composition can be stably dropped in the ODF process.

  As a method for polymerizing a polymerizable compound, an appropriate polymerization rate is desirable in order to obtain good alignment performance of liquid crystals. Therefore, active energy rays such as ultraviolet rays or electron beams are irradiated singly or in combination or sequentially. The method of polymerizing by is preferred. When ultraviolet rays are used, a polarized light source or a non-polarized light source may be used. In addition, when the polymerization is performed in a state where the polymerizable compound-containing liquid crystal composition is sandwiched between two substrates, at least the substrate on the irradiation surface side must be given appropriate transparency to the active energy rays. I must. Moreover, after polymerizing only a specific part using a mask during light irradiation, the orientation state of the unpolymerized part is changed by changing conditions such as an electric field, a magnetic field, or temperature, and further irradiation with active energy rays is performed. Then, it is possible to use a means for polymerization. In particular, when ultraviolet exposure is performed, it is preferable to perform ultraviolet exposure while applying an alternating electric field to the polymerizable compound-containing liquid crystal composition. The alternating electric field to be applied is preferably an alternating current having a frequency of 10 Hz to 10 kHz, more preferably a frequency of 60 Hz to 10 kHz, and the voltage is selected depending on a desired pretilt angle of the liquid crystal display element. That is, the pretilt angle of the liquid crystal display element can be controlled by the applied voltage. In a horizontal electric field type MVA mode liquid crystal display element, the pretilt angle is preferably controlled from 80 degrees to 89.9 degrees from the viewpoint of alignment stability and contrast.

The temperature during irradiation is preferably within a temperature range in which the liquid crystal state of the liquid crystal composition of the present invention is maintained. Polymerization is preferably performed at a temperature close to room temperature, that is, typically at a temperature of 15 to 35 ° C. As a lamp for generating ultraviolet rays, a metal halide lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like can be used. Moreover, as a wavelength of the ultraviolet-rays to irradiate, it is preferable to irradiate the ultraviolet-ray of the wavelength range which is not the absorption wavelength range of a liquid crystal composition, and it is preferable to cut and use an ultraviolet-ray as needed. Intensity of ultraviolet irradiation is ^preferably from ^{0.1mW / cm 2 ~100W / cm 2} , 2mW / cm 2 ~50W / cm 2 is more preferable. The amount of energy of ultraviolet rays to be irradiated can be adjusted as appropriate, but is preferably 10 mJ / cm ² to 500 J / cm ^{2, and} more preferably 100 mJ / cm ² to 200 J / cm ² . When irradiating with ultraviolet rays, the intensity may be changed. The time for irradiating with ultraviolet rays is appropriately selected depending on the intensity of the irradiated ultraviolet rays, but is preferably from 10 seconds to 3600 seconds, and more preferably from 10 seconds to 600 seconds.

  The liquid crystal display device using the liquid crystal composition of the present invention is useful for achieving both high-speed response and suppression of display failure, and is particularly useful for a liquid crystal display device for active matrix driving, including VA mode, PSVA mode, It can be applied to liquid crystal display elements for PSA mode, IPS (in-plane switching) mode, VA-IPS mode, FFS (fringe field switching) mode or ECB mode.

  Hereinafter, preferred embodiments of a liquid crystal display according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a liquid crystal display element including two substrates facing each other, a sealing material provided between the substrates, and liquid crystal sealed in a sealing region surrounded by the sealing material. It is.

  Specifically, the TFT layer 102 and the pixel electrode 103 are provided on the first substrate 100, the backplane on which the passivation film 104 and the first alignment film 105 are provided, and the black matrix on the second substrate 200. 202, a color filter 203, a planarization film (overcoat layer) 201, and a transparent electrode 204 are provided, and a second alignment film 205 is provided thereon, and is provided between the front plane facing the back plane and the substrate. A sealing material 301 and a liquid crystal layer 303 sealed in a sealing region surrounded by the sealing material, and protrusions (columnar spacers) 302 and 304 are provided on a substrate surface in contact with the sealing material 301. The specific aspect of a liquid crystal display element is shown.

  The first substrate or the second substrate is not particularly limited as long as it is substantially transparent, and glass, ceramics, plastics, or the like can be used. Examples of plastic substrates include cellulose derivatives such as cellulose, triacetyl cellulose, diacetyl cellulose, polycycloolefin derivatives, polyesters such as polyethylene terephthalate and polyethylene naphthalate, polypropylene, and polyethylene. Polyolefin, polycarbonate, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyamide, polyimide, polyimide amide, polystyrene, polyacrylate, polymethyl methacrylate, polyethersulfone, polyarylate, and glass fiber-epoxy resin Inorganic-organic composite materials such as glass fiber and acrylic resin can be used.

  When a plastic substrate is used, it is preferable to provide a barrier film. The function of the barrier film is to reduce the moisture permeability of the plastic substrate and to improve the reliability of the electrical characteristics of the liquid crystal display element. The barrier film is not particularly limited as long as it has high transparency and low water vapor permeability. Generally, vapor deposition, sputtering, chemical vapor deposition method (CVD method) using an inorganic material such as silicon oxide is used. ) Is used.

In the present invention, the same material or different materials may be used as the first substrate or the second substrate, and there is no particular limitation. Use of a glass substrate is preferable because a liquid crystal display element having excellent heat resistance and dimensional stability can be manufactured. In addition, a plastic substrate is preferable because it is suitable for a manufacturing method using a roll-to-roll method and is suitable for weight reduction or flexibility. For the purpose of imparting flatness and heat resistance, good results can be obtained by combining a plastic substrate and a glass substrate.
In the embodiments described later, a substrate is used as the material of the first substrate 100 or the second substrate 200.

  In the backplane, the TFT layer 102 and the pixel electrode 103 are provided on the first substrate 100. These are manufactured by a normal array process. A backplane is obtained by providing a passivation film 104 and a first alignment film 105 thereon.

  A passivation film 104 (also referred to as an inorganic protective film) is a film for protecting the TFT layer. Usually, a nitride film (SiNx), an oxide film (SiOx), or the like is formed by a chemical vapor deposition (CVD) technique or the like.

  The first alignment film 105 is a film having a function of aligning liquid crystals, and a polymer material such as polyimide is usually used in many cases. As the coating solution, an alignment agent solution composed of a polymer material and a solvent is used. Since the alignment film may hinder the adhesive force with the sealing material, a pattern is applied in the sealing region. For the application, a printing method such as a flexographic printing method or a droplet discharge method such as an ink jet is used. The applied alignment agent solution is crosslinked and cured by baking after the solvent is evaporated by temporary drying. Thereafter, an alignment process is performed to provide an alignment function.

  The alignment treatment is usually performed by a rubbing method. The polymer film formed as described above is rubbed in one direction using a rubbing cloth made of fibers such as rayon, thereby producing liquid crystal alignment ability.

  Moreover, the photo-alignment method may be used. The photo-alignment method is a method of generating alignment ability by irradiating polarized light on an alignment film containing an organic material having photosensitivity, and does not cause the generation of scratches or dust on the substrate due to the rubbing method. Examples of the organic material in the photo-alignment method include a material containing a dichroic dye. Dichroic dyes include molecular orientation induction or isomerization reaction (eg, azobenzene group), dimerization reaction (eg, cinnamoyl group), photocrosslinking reaction (eg, benzophenone group) due to Weigert effect resulting from photodichroism. Alternatively, those having a group (hereinafter abbreviated as a photo-alignment group) that causes a photoreaction that causes liquid crystal alignment ability, such as a photolysis reaction (eg, polyimide group), can be used. After the solvent is evaporated by temporary drying, the applied alignment agent solution is irradiated with light having an arbitrary deflection (polarized light), whereby an alignment film having alignment ability in an arbitrary direction can be obtained.

  One front plane is provided with a black matrix 202, a color filter 203, a planarization film 201, a transparent electrode 204, and a second alignment film 205 on a second substrate 200.

  The black matrix 202 is produced by, for example, a pigment dispersion method. Specifically, a color resin solution in which a black colorant is uniformly dispersed for forming a black matrix is applied on the second substrate 200 provided with the barrier film 201 to form a colored layer. Subsequently, the colored layer is baked and cured. A photoresist is applied on this and prebaked. After exposing the photoresist through a mask pattern, development is performed to pattern the colored layer. Thereafter, the photoresist layer is peeled off and the colored layer is baked to complete the black matrix 202.

  Alternatively, a photoresist type pigment dispersion may be used. In this case, a photoresist-type pigment dispersion is applied, pre-baked, exposed through a mask pattern, and then developed to pattern the colored layer. Thereafter, the photoresist layer is peeled off and the colored layer is baked to complete the black matrix 202.

  The color filter 203 is produced by a pigment dispersion method, an electrodeposition method, a printing method, a dyeing method, or the like. Taking the pigment dispersion method as an example, a color resin liquid in which a pigment (for example, red) is uniformly dispersed is applied onto the second substrate 200, and after baking and curing, a photoresist is applied thereon and prebaked. After the photoresist is exposed through a mask pattern, development is performed and patterning is performed. Thereafter, the photoresist layer is peeled off and baked again to complete the (red) color filter 203. There is no particular limitation on the color order to be produced. Similarly, a green color filter 203 and a blue color filter 203 are formed.

  The transparent electrode 204 is provided on the color filter 203 (if necessary, an overcoat layer (201) is provided on the color filter 203 for surface flattening). The transparent electrode 204 preferably has a high transmittance, and preferably has a low electrical resistance. The transparent electrode 204 is formed by sputtering an oxide film such as ITO.

  In addition, a passivation film may be provided on the transparent electrode 204 for the purpose of protecting the transparent electrode 204.

  The second alignment film 205 is the same as the first alignment film 105 described above.

  As mentioned above, although the specific aspect about the said back plane and the said front plane used by this invention was described, it is not limited to this specific aspect in this application, The aspect according to the liquid crystal display element desired is desired. Changes are free.

  The shape of the columnar spacer is not particularly limited, and the horizontal cross section can be various shapes such as a circle, a polygon such as a quadrangle, etc. A polygonal shape is particularly preferable. The protrusion shape is preferably a truncated cone or a truncated pyramid.

  The material of the columnar spacer is not particularly limited as long as it is a sealing material, an organic solvent used for the sealing material, or a material that does not dissolve in liquid crystal, but it may be a synthetic resin (curable resin) in terms of processing and weight reduction. preferable. On the other hand, the protrusion can be provided on the surface of the first substrate in contact with the sealing material by a photolithography method or a droplet discharge method. For these reasons, it is preferable to use a photocurable resin suitable for a photolithography method or a droplet discharge method.

  As an example, a case where the columnar spacer is obtained by a photolithography method will be described. FIG. 2 is a diagram of an exposure process using a columnar spacer preparation pattern formed on a black matrix as a photomask pattern.

  On the transparent electrode 204 of the front plane, a resin solution for forming columnar spacers (not containing a colorant) is applied. Subsequently, the resin layer 402 is baked and cured. A photoresist is applied on this and prebaked. After exposing the photoresist through the mask pattern 401, development is performed to pattern the resin layer. Thereafter, the photoresist layer is peeled off, and the resin layer is baked to complete columnar spacers (302 and 304 in FIG. 1).

  The formation position of the columnar spacer can be determined at a desired position by a mask pattern. Therefore, both the inside of the sealing region of the liquid crystal display element and the outside of the sealing region (sealed material application portion) can be manufactured simultaneously. The columnar spacer is preferably formed so as to be positioned on the black matrix so that the quality of the sealing region does not deteriorate. A columnar spacer manufactured by a photolithography method in this way is sometimes called a column spacer or a photospacer.

  As the material of the spacer, a negative water-soluble resin such as PVA-stilbazo photosensitive resin, a mixture of a polyfunctional acrylic monomer, an acrylic acid copolymer, a triazole initiator, or the like is used. Alternatively, there is a method using a color resin in which a colorant is dispersed in a polyimide resin. In the present invention, there is no particular limitation, and a spacer can be obtained from a known material in accordance with the compatibility with the liquid crystal or the sealing material to be used.

  Thus, after providing a columnar spacer on the surface to be a sealing region on the front plane, a seal material (301 in FIG. 1) is applied to the surface of the back plane that contacts the seal material.

  The material of the sealing material is not particularly limited, and a curable resin composition obtained by adding a polymerization initiator to an epoxy or acrylic photocurable, thermosetting, or photothermal combination curable resin is used. In order to control moisture permeability, elastic modulus, viscosity, etc., fillers made of inorganic or organic substances may be added. The shape of these fillers is not particularly limited, and includes a spherical shape, a fiber shape, and an amorphous shape. Furthermore, in order to control the cell gap satisfactorily, a spherical or fibrous gap material having a monodisperse diameter is mixed, or in order to further strengthen the adhesive force with the substrate, a fibrous substance that is easily entangled with the protrusions on the substrate is used. You may mix. The diameter of the fibrous material used at this time is desirably about 1/5 to 1/10 or less of the cell gap, and the length of the fibrous material is desirably shorter than the seal coating width.

  The material of the fibrous substance is not particularly limited as long as a predetermined shape can be obtained, and synthetic fibers such as cellulose, polyamide and polyester, and inorganic materials such as glass and carbon can be appropriately selected.

  As a method for applying the sealing material, there are a printing method and a dispensing method, but a dispensing method with a small amount of the sealing material used is desirable. The application position of the sealing material is usually on the black matrix so as not to adversely affect the sealing area. In order to form a liquid crystal dropping region in the next step (so that the liquid crystal does not leak), the sealing material application shape is a closed loop shape.

  Liquid crystal is dropped onto the closed loop shape (sealing region) of the front plane to which the sealing material is applied. Usually a dispenser is used. Since the amount of liquid crystal to be dropped coincides with the volume of the liquid crystal cell, the amount is basically the same as the volume obtained by multiplying the height of the column spacer and the seal application area. However, in order to optimize liquid crystal leakage and display characteristics in the cell bonding process, the amount of liquid crystal to be dropped may be adjusted as appropriate, or the liquid crystal dropping position may be dispersed.

  Next, a back plane is bonded to the front plane on which the sealing material is applied and liquid crystal is dropped. Specifically, the front plane and the back plane are adsorbed on a stage having a mechanism for adsorbing a substrate such as an electrostatic chuck, and the second alignment film on the front plane and the first alignment film on the back plane face each other. In the meantime, it is arranged at a position (distance) where the sealing material does not contact the other substrate. In this state, the system is depressurized. After decompression is completed, the positions of both substrates are adjusted while confirming the bonding position between the front plane and the back plane (alignment operation). When the adjustment of the bonding position is completed, the substrate is brought close to a position where the sealing material on the front plane and the back plane are in contact with each other. In this state, the system is filled with an inert gas, and the pressure is gradually returned to normal pressure while releasing the reduced pressure. At this time, the front plane and the back plane are bonded together by atmospheric pressure, and a cell gap is formed at the height of the columnar spacer. In this state, the sealing material is irradiated with ultraviolet rays to cure the sealing material, thereby forming a liquid crystal cell. Thereafter, a heating step is added in some cases to promote curing of the sealing material. A heating process is often added to enhance the adhesive strength of the sealing material and improve the reliability of electrical characteristics.

  EXAMPLES The present invention will be described in further detail with reference to examples below, but the present invention is not limited to these examples. Further, “%” in the compositions of the following Examples and Comparative Examples means “mass%”.

In the examples, the measured characteristics are as follows.
Tni: Nematic phase-isotropic liquid phase transition temperature (° C.)
Δn: Refractive index anisotropy at 298K (also known as birefringence)
Δε: Dielectric anisotropy at 298K η: Viscosity at 293K (mPa · s)
γ1: Rotational viscosity at 298K (mPa · s)

VHR: Voltage holding ratio (%) at 333 K under conditions of frequency 60 Hz and applied voltage 5 V
After heat resistance test VHR: TEG (test element group) for evaluation of electro-optical characteristics in which a liquid crystal composition sample was enclosed was held in a thermostatic bath at 130 ° C. for 1 hour, and then measured under the same conditions as the above-described VHR measurement method. .

Burn-in:
The burn-in evaluation of the liquid crystal display element is performed until the afterimage of the fixed pattern reaches an unacceptable afterimage level when displaying the predetermined fixed pattern in the display area for an arbitrary test time and then displaying the entire screen uniformly. The test time was measured.
1) The test time referred to here indicates the display time of the fixed pattern, and the longer this time is, the more the afterimage is suppressed and the higher the performance.
2) An unacceptable afterimage level is a level at which an afterimage that fails a pass / fail decision is observed.

Drop marks:
The evaluation of the drop marks on the liquid crystal display was performed by the following five-step evaluation of the drop marks that appeared white when the entire surface was displayed in black.
5: No dripping trace (excellent)
4: Acceptable level (good) with very few drops
3: There is a slight drop mark, borderline level of pass / fail judgment (possible with conditions)
2: There is a drop mark, unacceptable level (impossible)
1: There is a drip mark, quite bad (bad)

Process suitability:
The process suitability is determined by dropping 50 pL at a time by using a constant volume metering pump at 0 to 100 times, 101 to 200 times, 201 to 300 times,... The mass of the liquid crystal for 100 drops was measured and evaluated by the number of drops when the mass variation reached a size that could not be adapted to the ODF process.
It can be said that the more the number of times of dropping, the more stable the dropping over a long time, and the higher the process compatibility.

Solubility at low temperature:
In order to evaluate the solubility at a low temperature, after preparing the liquid crystal composition, 1 g of the liquid crystal composition was weighed in a 2 mL sample bottle, and the following operation state “−20 ° C. (1 hour) in a temperature-controlled test tank. Hold) → Temperature rise (0.1 ° C./min)→0° C. (hold for 1 hour) → Temperature rise (0.1 ° C./min)→20° C. (hold for 1 hour) → Temperature drop (−0.1 ° C.) / Min) → 0 ° C. (holding for 1 hour) → temperature drop (−0.1 ° C./min)→−20° C. ”, continuously changing the temperature, and visually observing the precipitates from the liquid crystal composition Generation | occurrence | production was observed and the test time when a deposit was observed was measured.
The longer the test time, the more stably the liquid crystal phase is maintained for a long time, and the solubility at low temperature is better.

Volatility / contamination of production equipment:
Evaluation of the volatility of the liquid crystal material was performed by observing the operating state of the vacuum stirring and defoaming mixer using a stroboscope and visually observing the foaming of the liquid crystal material. Specifically, put 0.8kg of the liquid crystal composition in a dedicated container vacuum agitation defoaming mixer having a volume 2.0L, under degassing of 4 kPa, the revolution speed ^{15S -1,} vacuum stirring at rotation speed 7.5S ^-1 The defoaming mixer was operated and the time until foaming started was measured.
The longer the time until foaming starts, the more difficult it is to volatilize and the lower the possibility of contaminating the production equipment, indicating high performance.

(Examples 1-2)
The composition shown in Table 1 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 2 shows the evaluation results of the obtained composition and the liquid crystal display.

(Comparative Example 1)
The composition shown in Table 1 not containing the compound represented by the general formula (i) was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 2 shows the evaluation results of the obtained composition and the liquid crystal display.

  Compared with the composition prepared in Comparative Example 1, the compositions prepared in Examples 1 and 2 can continue dripping stably over a long period of time in the ODF process, and can be dissolved at a low temperature. It was remarkably excellent in property. Moreover, the liquid crystal display produced by Examples 1-2 is a thing by which the burning was suppressed compared with the liquid crystal display produced by the comparative example 1, and the fall of the display quality by dripping trace is suppressed. It was.

(Examples 3 to 4)
The composition shown in Table 3 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 4 shows the evaluation results of the obtained composition and the liquid crystal display.

(Comparative Example 2)
The composition shown in Table 3 not containing the compound represented by the general formula (i) was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 4 shows the evaluation results of the obtained composition and the liquid crystal display.

  Compared with the composition prepared in Comparative Example 2, the compositions prepared in Examples 3 to 4 can continue dripping stably over a long period of time in the ODF process, and can be dissolved at a low temperature. It was remarkably excellent in property. In addition, the liquid crystal display produced in Examples 3 to 4 is one in which image sticking is suppressed as compared with the liquid crystal display produced in Comparative Example 2, and the deterioration in display quality due to dripping marks is suppressed. It was.

(Examples 5-6)
The composition shown in Table 5 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 6 shows the evaluation results of the obtained composition and the liquid crystal display.

(Comparative Example 3)
The composition shown in Table 5 not containing the compound represented by the general formula (ii) was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 6 shows the evaluation results of the obtained composition and the liquid crystal display.

(Examples 7 to 10)
The composition shown in Table 7 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 8 shows the evaluation results of the obtained composition and the liquid crystal display.

(Examples 11-14)
The composition shown in Table 9 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 10 shows the evaluation results of the obtained composition and the liquid crystal display.

(Examples 15 to 18)
The composition shown in Table 11 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 12 shows the evaluation results of the obtained composition and the liquid crystal display.

(Examples 19 to 22)
The composition shown in Table 13 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 14 shows the evaluation results of the obtained composition and the liquid crystal display.

(Examples 23 to 26)
The composition shown in Table 15 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 16 shows the evaluation results of the obtained composition and the liquid crystal display.

(Examples 27 to 30)
The composition shown in Table 17 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 18 shows the evaluation results of the obtained composition and the liquid crystal display.

(Examples 31-34)
The composition shown in Table 19 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 20 shows the evaluation results of the obtained composition and the liquid crystal display.

(Examples 35-38)
The composition shown in Table 21 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 22 shows the evaluation results of the obtained composition and the liquid crystal display.

(Examples 39 to 41)
The composition shown in Table 23 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 24 shows the evaluation results of the obtained composition and the liquid crystal display.

(Comparative Example 4)
The composition shown in Table 23 which does not contain the compound represented by Formula (ii) was prepared, and the IPS type | mold liquid crystal display of the structure shown in FIG.1 and FIG.2 was produced. Table 24 shows the evaluation results of the obtained composition and the liquid crystal display.

  Compared with the composition prepared in Comparative Example 4, the compositions prepared in Examples 39 to 41 can continue dripping stably over a long period of time in the ODF process, and can be dissolved at a low temperature. It was remarkably excellent in property. In addition, the liquid crystal display produced in Examples 39 to 41 has a reduced burn-in as compared with the liquid crystal display produced in Comparative Example 4, and a reduction in display quality due to dripping marks is suppressed. It was.

(Examples 42 to 45)
The composition shown in Table 25 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 26 shows the evaluation results of the obtained composition and the liquid crystal display.

(Comparative Example 5)
The composition shown in Table 25 which does not contain the compound represented by Formula (i) was prepared, and the IPS type | mold liquid crystal display of the structure shown in FIG.1 and FIG.2 was produced. Table 26 shows the evaluation results of the obtained composition and the liquid crystal display.

  Compared with the composition prepared in Comparative Example 5, the compositions prepared in Examples 42 to 45 can continue dripping stably over a long period of time in the ODF process, and can be dissolved at a low temperature. It was remarkably excellent in property. In addition, the liquid crystal display produced in Examples 42 to 45 is one in which image sticking is suppressed as compared with the liquid crystal display produced in Comparative Example 5, and the deterioration of display quality due to dripping marks is suppressed. It was.

(Examples 46 to 49)
A composition shown in Table 27 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 28 shows the evaluation results of the obtained composition and the liquid crystal display.

(Examples 50 to 52)
The composition shown in Table 29 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 30 shows the evaluation results of the obtained composition and the liquid crystal display.

(Comparative Example 6)
The composition shown in Table 29 which does not contain the compound represented by Formula (ii) was prepared, and the IPS type | mold liquid crystal display of the structure shown in FIG.1 and FIG.2 was produced. Table 30 shows the evaluation results of the obtained composition and the liquid crystal display.

  Compared with the composition prepared in Comparative Example 6, the compositions prepared in Examples 50 to 52 can continue dripping stably over a long period of time in the ODF process, and can be dissolved at a low temperature. It was remarkably excellent in property. In addition, the liquid crystal display produced in Examples 50 to 52 is one in which image sticking is suppressed as compared with the liquid crystal display produced in Comparative Example 6, and the deterioration in display quality due to the drop marks is suppressed. It was.

(Examples 53 to 56)
The composition shown in Table 31 was prepared, and an IPS liquid crystal display having the structure shown in FIGS. 1 and 2 was produced. Table 32 shows the evaluation results of the obtained composition and the liquid crystal display.

  The liquid crystal compositions prepared in the above examples had low viscosity and good solubility at low temperatures. Moreover, it was poor in volatility and could suppress device contamination. In addition, in the ODF process, it is possible to suppress the deviation of the dropping amount of the liquid crystal composition, and it is possible to stably produce a liquid crystal display over a long period of time. Moreover, the liquid crystal display produced in the Example was excellent in heat resistance and maintained stable display characteristics over a long period of time.

  The liquid crystal composition having a positive dielectric anisotropy of the present invention has good solubility at low temperatures, and the practical resistance of the product is high because the specific resistance and voltage holding ratio are very little affected by heat and light. A liquid crystal display device including the same can achieve a high-speed response. In addition, since the liquid crystal composition can be stably dropped in the liquid crystal display element manufacturing process, display defects due to the process can be suppressed and manufacturing can be performed with a high yield, which is very useful.

DESCRIPTION OF SYMBOLS 100 1st board | substrate 102 TFT layer 103 Pixel electrode 104 Passivation layer 105 1st alignment film 200 2nd board | substrate 201 Planarization film 202 Black matrix 203 Color filter 204 Transparent electrode 205 2nd alignment film 301 Seal material 302 Protrusion (columnar spacer)
303 Liquid crystal layer 304 Protrusion (columnar spacer)
401 mask pattern 402 resin layer

Claims (48)

A liquid crystal composition having positive dielectric anisotropy, which is represented by the following formula (i):

And a compound represented by the following general formula (ii):

In the formula, R ⁱⁱ¹ and R ⁱⁱ² each independently represent an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 4 to 5 carbon atoms, and X ⁱⁱ¹ and X ⁱⁱ² are each independently Represents a hydrogen atom or a fluorine atom,
A liquid crystal composition comprising at least one compound represented by the formula: The liquid crystal composition according to claim 1, wherein in the general formula (ii), one of X ⁱⁱ¹ and X ⁱⁱ² represents a hydrogen atom and the other represents a fluorine atom. As at least one compound represented by the general formula (ii), the following formula (ii.2.1):

And a compound represented by the following formula (ii.2.2):

3. The liquid crystal composition according to claim 2, comprising at least one compound selected from the group consisting of compounds represented by the formula: object. As at least one compound represented by the general formula (ii), the following formula (ii.1.3):

The liquid crystal composition of Claim 2 containing the compound represented by these. As at least one compound represented by the general formula (ii), the following formula (ii.2.9):

And a compound represented by the following formula (ii.2.10):

The liquid crystal composition according to claim 2, comprising at least one compound selected from the group consisting of compounds represented by: The following general formula (L):

In the above formula,
R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and at least two non-adjacent —CH ₂ — in the alkyl group are each independently —CH _2. ═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO— may be substituted,
OL represents 0, 1, 2 or 3;
B ^L1 , B ^L2 and B ^L3 are each independently
(A) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or at least two non-adjacent —CH ₂ — may be replaced by —O—), and ,
(B) a 1,4-phenylene group (one -CH = present in the group or at least two non-adjacent -CH = may be replaced by -N =),
Each of the groups (a) and (b) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom,
L ^L1 and L ^L2 each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, — OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—
When OL is 2 or 3 and a plurality of L ^L2 are present, they may be the same or different, and when OL is 2 or 3 and a plurality of B ^L3 is present, they are the same Or may be different, except for the compound represented by the general formula (ii),
The liquid crystal composition according to claim 1, further comprising at least one compound represented by: The following general formula (M):

In the above formula,
R ^M1 represents an alkyl group having 1 to 8 carbon atoms, and at least one non-adjacent —CH ₂ — in the alkyl group is independently —CH═CH—, —C. ≡C—, —O—, —CO—, —COO— or —OCO— may be substituted,
PM represents 0, 1, 2, 3 or 4;
C ^M1 and C ^M2 are each independently
(D) 1,4-cyclohexylene group (in this group, one —CH ₂ — or at least two —CH ₂ — which are not adjacent to each other may be replaced by —O— or —S—). Good) and
(E) a 1,4-phenylene group (one -CH = present in the group or at least two non-adjacent -CH = may be replaced by -N =),
The group (d) and the group (e) are each independently substituted with a cyano group, a fluorine atom or a chlorine atom,
K ^M1 and K ^M2 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O. -, -COO-, -OCO- or -C≡C-
When PM is 2, 3 or 4 and there are a plurality of K ^M1 , they may be the same or different, and when PM is 2, 3 or 4 and there are a plurality of C ^M2 They may be the same or different,
X ^M1 and X ^M3 each independently represent a hydrogen atom, a chlorine atom or a fluorine atom,
X ^M2 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, or a 2,2,2-trifluoroethyl group, Excluding the compound represented by (i),
The liquid crystal composition according to claim 1, further comprising at least one compound represented by: As at least one compound represented by the general formula (L), the following general formula (II-2):

In the above formula, R ²³ represents an alkenyl group having 2 to 5 carbon atoms, R ²⁴ represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms,
The liquid crystal composition according to claim 6, comprising at least one compound represented by the formula: As at least one compound represented by the general formula (II-2), the following formula (11.2):

The liquid crystal composition according to claim 8, which contains at least 13 mass% of the compound represented by formula (1) with respect to the total mass of the liquid crystal composition. As at least one compound represented by the general formula (M), the following general formula (X-6):

In the above formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms,
The liquid crystal composition according to claim 7, comprising at least one compound represented by the formula: As at least one compound represented by the general formula (X-6), the following formula (44.1):

The liquid crystal composition according to claim 10, wherein the compound represented by the formula is contained in an amount of 0.5% by mass or more and 4% by mass or less based on the total mass of the liquid crystal composition. As at least one compound represented by the general formula (M), the following general formula (IX-2-2):

In the above formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms,
The liquid crystal composition according to claim 7, comprising at least one compound represented by the formula: As at least one compound represented by the general formula (IX-2-2), the following formula (31.2):

The liquid crystal composition according to claim 12, which contains at least 9% by mass of the compound represented by formula (1) with respect to the total mass of the liquid crystal composition. As at least one compound represented by the general formula (M), the following general formula (IX-2-3):

In the above formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms,
The liquid crystal composition according to claim 7, comprising at least one compound represented by the formula: As at least one compound represented by the general formula (IX-2-3), the following formula (32.2):

The liquid crystal composition according to claim 14, wherein the compound represented by the formula is contained in an amount of 0.5% by mass or more and less than 5% by mass with respect to the total mass of the liquid crystal composition. As at least one compound represented by the general formula (IX-2-3), the following formula (32.4):

The liquid crystal composition according to claim 14, wherein the compound represented by the formula is contained in an amount of 0.5% by mass or more and less than 5% by mass with respect to the total mass of the liquid crystal composition. As at least one compound represented by the general formula (M), the following general formula (IX-2-1):

In the above formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms,
The liquid crystal composition according to claim 7, comprising at least one compound represented by the formula: As at least one compound represented by the general formula (IX-2-1), the formula (30.1):

The liquid crystal composition of Claim 17 containing the compound represented by these. As at least one compound represented by the general formula (IX-2-1), the formula (30.2):

The liquid crystal composition of Claim 17 containing the compound represented by these. As at least one compound represented by the general formula (M), the following general formula (X-2-1):

In the above formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms,
The liquid crystal composition according to claim 7, comprising at least one compound represented by the formula: As at least one compound represented by the general formula (X-2-1), the formula (39.2):

The liquid crystal composition of Claim 20 containing the compound represented by these. As at least one compound represented by the general formula (M), the following general formula (X-3-1):

In the above formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms,
The liquid crystal composition according to claim 7, comprising at least one compound represented by the formula: As at least one compound represented by the general formula (X-3-1), the formula (41.2):

The liquid crystal composition according to claim 22, wherein the compound represented by formula (I) is contained in an amount of 0.5% by mass or more and less than 2% by mass with respect to the total mass of the liquid crystal composition. As at least one compound represented by the general formula (M), the following general formula (XIV-2-2):

In the above formula, R ¹⁴⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms,
The liquid crystal composition according to claim 7, comprising at least one compound represented by the formula: As at least one compound represented by the general formula (XIV-2-2), the formula (54.2):

The liquid crystal composition of Claim 24 containing the compound represented by these. As at least one compound represented by the general formula (XIV-2-2), the formula (54.4):

The liquid crystal composition of Claim 24 containing the compound represented by these. As at least one compound represented by the general formula (M), the following general formula (XIV-1):

In the above formula, R ¹⁴⁰ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms, and Y ¹⁴ represents a fluorine atom, a chlorine atom or —OCF. ₃
The liquid crystal composition according to claim 7, comprising at least one compound represented by the formula: As at least one compound represented by the general formula (XIV-1), the formula (51.1):

The liquid crystal composition according to claim 27, wherein the compound represented by the formula (1) is contained at least 8 mass% with respect to the total mass of the liquid crystal composition. As at least one compound represented by the general formula (L), the following general formula (I-2):

In the above formula, R ¹³ and R ¹⁴ each independently represents an alkyl group having 1 to 5 carbon atoms,
The liquid crystal composition according to claim 6, comprising at least one compound represented by the formula: As at least one compound represented by formula (I-2), formula (3.1):

The liquid crystal composition according to claim 29, wherein the compound represented by the formula (1) is contained at least 6% by mass relative to the total mass of the liquid crystal composition. As the at least one compound represented by the general formula (I-2), the formula (3.3):

The liquid crystal composition according to claim 29, wherein the compound represented by the formula (1) is contained at least 6% by mass relative to the total mass of the liquid crystal composition. As the at least one compound represented by the general formula (I-2), the formula (3.4):

The liquid crystal composition according to claim 29, wherein the compound represented by the formula (1) is contained at least 3 mass% with respect to the total mass of the liquid crystal composition. As at least one compound represented by the general formula (L), the following general formula (I-5):

In the above formula, R ¹¹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and R ¹² represents an alkyl group having 1 to 5 carbon atoms. A group, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms,
The liquid crystal composition according to claim 6, comprising at least one compound represented by the formula: As at least one compound represented by formula (I-5), formula (6.6):

The liquid crystal composition according to claim 33, comprising a compound represented by: As at least one compound represented by the general formula (M), the following general formula (X-4-1):

In the above formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms,
The liquid crystal composition according to claim 7, comprising at least one compound represented by the formula: As at least one compound represented by the general formula (X-4-1), the formula (42.3):

The liquid crystal composition according to claim 35, comprising a compound represented by: Following formula (2.5):

The liquid crystal composition according to claim 1, further comprising a compound represented by: As at least one compound represented by the general formula (M), the following general formula (XIII-3):

In the above formula, R ¹³⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms,
The liquid crystal composition according to claim 7, comprising at least one compound represented by the formula: As at least one compound represented by the general formula (XIII-3), the formula (50.1):

The liquid crystal composition according to claim 38, comprising a compound represented by: The following general formula (Qa):

In the above formula, R ^Q1 represents a linear alkyl group or a branched alkyl group having 1 to 10 carbon atoms,
The liquid crystal composition according to claim 1, further comprising a compound represented by: As a compound represented by the general formula (Qa), the following formula (Qa-1):

The liquid crystal composition according to claim 40, comprising a compound represented by: The following general formula (Qc):

In the above formula, R ^Q3 represents a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group, a linear alkoxy group or a branched alkoxy group.
The liquid crystal composition according to claim 1, further comprising a compound represented by: As a compound represented by the general formula (Qc), the following formula (Qc-1):

The liquid crystal composition according to claim 42, comprising a compound represented by: As at least one compound represented by the general formula (L), the following formula (12.4):

The liquid crystal composition of Claim 6 containing the compound represented by these. Following formula (62.1):

The liquid crystal composition according to claim 1, further comprising a compound represented by:   A liquid crystal display device using the liquid crystal composition according to claim 1.   47. The liquid crystal display element according to claim 46, wherein the display method is IPS mode, OCB mode, ECB mode, VA mode, VA-IPS mode, or FFS mode.   48. A liquid crystal display comprising the liquid crystal display element according to claim 46 or 47.

Images