WO2018207247A1

WO2018207247A1 - Liquid crystal display element

Info

Publication number: WO2018207247A1
Application number: PCT/JP2017/017498
Authority: WO
Inventors: 丸山　和則; 佐々木　剛
Original assignee: Dic株式会社
Priority date: 2017-05-09
Filing date: 2017-05-09
Publication date: 2018-11-15

Abstract

The present invention provides an IPS-mode liquid-crystal display element that exhibits high contrast and is capable of achieving excellent display characteristics. The liquid-crystal display element comprises: a first substrate; a second substrate facing the first substrate; and a liquid crystal layer interposed between the first substrate and the second substrate and containing liquid crystal compositions. Each pixel has, on the first substrate: a first electrode; a plurality of gate bus lines and data bus lines arranged in a matrix; thin-film transistors provided on the intersections between the gate bus lines and the data bus lines; and a second electrode driven by the transistors. The liquid-crystal display element includes an alignment layer that induces homogeneous alignment between the liquid crystal layer and the first substrate and/or the second substrate. The inter-electrode distance G between the first electrode and the second electrode and the thickness H of the liquid crystal layer satisfy the relationship G ≥ H. The liquid crystal compositions have negative dielectric anisotropy with a bend elastic constant (K33) of 17 pN or greater.

Description

Liquid crystal display element

The present invention relates to an IPS mode liquid crystal display device using a nematic crystal composition having a negative dielectric anisotropy.

Liquid crystal display elements are used in clocks, calculators, various household electrical devices, measuring devices, automotive panels, word processors, electronic notebooks, printers, computers, televisions, and the like. Typical liquid crystal display methods include TN (twisted nematic) mode, STN (super twisted nematic) mode, DS (dynamic light scattering) mode, GH (guest / host) mode, IPS (in-plane switching). Mode, FFS (fringe field switching) mode, OCB (optical compensation birefringence) mode, ECB (voltage controlled birefringence) mode, VA (vertical alignment) mode, CSH (color super homeotropic) mode, or FLC (ferroelectric) Liquid crystal). Among these, IPS mode liquid crystal display elements are widely used for liquid crystal TVs and the like of relatively high grade because they are excellent in view angle characteristics and color reproducibility.

In recent years, the resolution of liquid crystal TVs has been increased, and many products having a resolution of 4K have already been developed, and further development of the next generation 8K and the like is progressing. Even if the resolution is increased, the size of the entire TV is not necessarily increased. As a result, the size of one pixel is reduced as the resolution is increased. Therefore, as the resolution is increased, the transmittance of the panel is reduced.

In the IPS mode, it is common to use a liquid crystal composition (p-type liquid crystal composition) in which Δε, which tends to increase the dielectric anisotropy in order to reduce the driving voltage, shows a positive value. When the voltage is turned on, the long axis direction of the liquid crystal molecules becomes parallel to the electric field direction, and liquid crystal molecules are aligned in the direction where the liquid crystal molecules stand with respect to the substrate. Reference 1 and Patent Reference 2).

On the other hand, the transmittance can be improved by using a liquid crystal composition (n-type liquid crystal composition) in which Δε has a negative value in an IPS mode liquid crystal display element, but compared with the case where a p-type liquid crystal composition is used. However, since the dielectric anisotropy is small, the driving voltage is large, and since the rotational viscosity is large, the response speed is also inferior. Recently, in addition to the high-speed response and high reliability normally required for liquid crystal compositions used for televisions and the like, a liquid crystal panel with high contrast has been demanded. There is a need for a composition. However, the n-type liquid crystal composition is generally used as a liquid crystal composition for VA. However, in the VA mode and the IPS mode, any of the alignment direction, the electric field direction, and the required optical characteristics can be taken. Different. Therefore, even if the n-type composition for the VA mode is simply diverted, it is difficult to construct a high-performance liquid crystal display element as required today, and n optimized for the characteristics required for the IPS mode. There is a need to provide a liquid crystal type liquid crystal composition.

JP 2000-10110 A JP 2000-131717 A

An object of the present invention is to provide a liquid crystal display using a liquid crystal composition having a negative dielectric constant anisotropy and having a high contrast, a high response speed, and excellent display characteristics in an IPS mode liquid crystal display element. An element is provided.

The inventors of the present application have intensively studied to solve the above problems, and found that the above problems can be solved by combining a specific element configuration and a specific liquid crystal composition, and have completed the present invention. .

The present invention sandwiches a liquid crystal layer containing a liquid crystal composition between the first substrate, the second substrate, and the first substrate and the second substrate that are disposed opposite to each other,
A first electrode on the first substrate; a plurality of gate bus lines and data bus lines arranged in a matrix;
A thin film transistor provided at an intersection of the gate bus line and the data bus line, and a second electrode driven by the transistor for each pixel;
Having an alignment film layer for inducing homogeneous alignment between the liquid crystal layer and the first substrate and / or the second substrate;
The distance between the first electrode and the second electrode: G and the thickness of the liquid crystal layer: H satisfy the relationship G ≧ H,
Provided is a liquid crystal display device, wherein the liquid crystal composition has a negative dielectric anisotropy and a bend elastic constant (K ₃₃ ) of 17 pN or more.

The liquid crystal display element of the IPS mode of the present invention has high contrast, fast response speed, and excellent display characteristics.

The figure which shows typically an example of a structure of the liquid crystal display element of this invention. The top view which expanded a part of area | region enclosed with the II line of the electrode layer 3 formed on the board | substrate 2 in FIG. FIG. 2 is a cross-sectional view of the liquid crystal display element shown in FIG. 1 taken along the line III-III in FIG. The figure which shows typically the orientation direction of the liquid crystal induced by the orientation film 4 An enlarged plan view of the electrode configuration of a liquid crystal display element Sectional drawing of the other example which cut | disconnected the liquid crystal display element shown in FIG. 1 in the III-III line direction in FIG.

The liquid crystal display element of the present invention is a combination of specific liquid crystal compositions. First, embodiments of the liquid crystal composition in the present invention will be described.
(Liquid crystal layer)
The liquid crystal composition of the present invention is a liquid crystal composition having a negative dielectric anisotropy having a bend elastic constant (K ₃₃ ) of 17 pN or more. The behavior of liquid crystal molecules is explained by three modes: spray (spread), twist (twist) and bend (bend) in response to an external electric field. The splay elastic constant (K ₁₁ ) is an elastic constant corresponding to the splay mode, the twist elastic constant (K ₂₂ ) is an elastic constant corresponding to the twist mode, and the bend elastic constant (K ₃₃ ). Is an elastic constant corresponding to the twist mode.

In the present invention, by defining the K _33, it is obtained the liquid crystal display device excellent in contrast. The IPS mode is a transverse electric field mode that uses an electric field generated in the horizontal direction with respect to the substrate. When a liquid crystal composition having a negative Δε is applied to a transverse electric field type liquid crystal display element, an alignment film that induces homogeneous alignment, etc. The liquid crystal molecules are aligned so as to be parallel to the substrate surface. However, when the liquid crystal composition of the present invention is used, the alignment state in the initial alignment state is excellent, and the alignment fluctuation of the liquid crystal molecules is small. It is thought that it is to become. In the IPS mode liquid crystal display element, the major axis direction of the liquid crystal molecules is aligned horizontally with respect to the substrate, and the liquid crystal molecules are rotated in the horizontal direction by applying a voltage to drive the liquid crystal. The variation in orientation in the direction is one factor that affects the characteristics of the display element. By using the liquid crystal composition having the elastic constant defined in the present invention, the orientation of the liquid crystal molecules is excellent, resulting in display. It is considered that the blackness of the element is excellent and affects the improvement of contrast.

The bend elastic constant (K ₃₃ ) is preferably 17.0 pN or more, preferably 17.2 pN or more, preferably 17.4 pN or more, preferably 17.6 pN or more, preferably 17.8 pN or more, preferably 18.0 pN or more. 18.2 pN or more, preferably 18.4 pN or more, preferably 18.6 pN or more, preferably 18.8 pN or more, preferably 19.0 pN or more, preferably 19.2 pN or more, preferably 19.4 pN or more, 19.6 pN or more is preferable, 19.8 pN or more is preferable, 20.0 pN or more is preferable, 20.5 pN or more is preferable, and 21.0 pN or more is preferable.

The composition of the present invention preferably contains one or more compounds selected from the compounds represented by formulas (N-1), (N-2) and (N-3). These compounds correspond to dielectrically negative compounds (the sign of Δε is negative and the absolute value is greater than 2).

(Wherein, R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31 and R ^N32 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent 2 in the alkyl group _Two or more —CH ₂ — may be each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31, and A ^N32 are each independently (a) a 1,4-cyclohexylene group (one —CH ₂ — or adjacent to each other in this group). And two or more —CH ₂ — may be replaced by —O—) and (b) a 1,4-phenylene group (one —CH═ present in this group or not adjacent 2 More than one -CH = may be replaced by -N =.)
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be replaced by —N═. )
(D) represents a group selected from the group consisting of 1,4-cyclohexenylene groups, and the groups (a), (b), (c) and (d) are each independently a cyano group, It may be substituted with a fluorine atom or a chlorine atom,
Z ^N11 , Z ^N12 , Z ^N21 , Z ^N22 , Z ^N31 and Z ^N32 are each independently 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—,
^XN21 represents a hydrogen atom or a fluorine atom,
T ^N31 represents —CH ₂ — or an oxygen atom,
n ^N11 , n ^N12 , n ^N21 , n ^N22 , n ^N31, and n ^N32 each independently represent an integer of 0 to 3, but n ^N11 + n ^N12 , n ^N21 + n ^N22, and n ^N31 + n ^N32 are each independently When there are a plurality of A ^N11 to A ^N32 and Z ^N11 to Z ^N32 , they may be the same or different. )
The compounds represented by the general formulas (N-1), (N-2) and (N-3) are preferably compounds having a negative Δε and an absolute value larger than 3.

In the general formulas (N-1), (N-2) and (N-3), R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31 and R ^N32 each independently represent 1 to 8 carbon atoms. An alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms, preferably an alkyl group having 1 to 5 carbon atoms, An alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms is preferable, and an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms is preferable. More preferably, an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms is more preferable, and an alkenyl group having 3 carbon atoms (propenyl group) is particularly preferable.

Further, when the ring structure to which it is bonded is a phenyl group (aromatic), a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms and carbon An alkenyl group having 4 to 5 atoms is preferable, and when the ring structure to which the alkenyl group 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 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. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

The alkenyl group is preferably selected from groups represented by any of the formulas (R1) to (R9). (The black dot in each formula represents a carbon atom in the ring structure or an oxygen atom bonded to the carbon atom in the ring structure.)

The liquid crystal composition of the present invention includes at least one of R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31, and R ^{N32 in} the general formulas (N-1), (N-2), and (N-3). The above is the following formula (NRd)

(In the formula, R ^Nd1 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, m ^Nd represents an integer of 0 to 5, and a black dot in the formula represents a carbon atom in the ring structure or a carbon in the ring structure. Represents an oxygen atom bonded to an atom.)
It is preferable from a viewpoint of the improvement of the contrast of a liquid crystal display element to contain 1 type, or 2 or more types of compounds which are group represented by these.

In the compound having a group represented by the formula (NRd), the number of ring structures in the molecule is 3 or more, that is, the general formula (N-1) having a group represented by the formula (NRd), ( In the compounds represented by N-2) and (N-3), n ^N11 + n ^N12 , n ^N21 + n ^N22 and n ^N31 + n ^N32 preferably represent 2 or 3. The content of the compound having a group represented by the formula (NRd) and having 3 or more ring structures in the molecule is preferably 3% or more, preferably 5% or more, 7% The above is preferable, 10% or more is preferable, 13% or more is preferable, 15% or more is preferable, 20% or more is preferable, 50% or less is preferable, 40% or less is preferable, and 30% or less is preferable.

A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31, and A ^N32 are preferably aromatic when it is required to increase Δn independently, and in order to improve the response speed, fat Preferably a trans-1,4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5 -Difluoro-1,4-phenylene group, 2,3-difluoro-1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1 , 4-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group Preferred, it is more preferable that represents the following structures,

More preferably, it represents a trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group.

^{^{^{^{Z N11, Z N12, Z N21}}}} , Z N22, Z N31 and ^{Z N32} _-CH 2 each _{independently} _{O -, - CF 2 O -} , - CH 2 CH 2 -, - CF 2 CF 2 - or a single bond preferably represents _{_{an, -CH 2 O -, - CH}} 2 CH 2 - or a single bond is more preferable, _-CH 2 O-or a single bond is particularly preferred.

^XN21 is preferably a fluorine atom.

T ^N31 is preferably an oxygen atom.

n ^N11 + n ^N12 , n ^N21 + n ^N22 and n ^N31 + n ^N32 are preferably 1 or 2, a combination in which n ^N11 is 1 and n ^N12 is 0, a combination in which n ^N11 is 2 and n ^N12 is 0, n ^A combination in which ^N11 is 1 and n ^N12 is 1, a combination in which n ^N11 is 2 and n ^N12 is 1, a combination in which n ^N21 is 1 and n ^N22 is 0, n ^N21 is 2 and n ^N22 is n A combination in which n ^N31 is 1 and n ^N32 is 0, and a combination in which n ^N31 is 2 and n ^N32 is 0 are preferable.

The lower limit of the preferable content of the compound represented by the formula (N-1) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, 30% , 40%, 50%, 55%, 60%, 65%, 70%, 75%, and 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20% It is.

The lower limit of the preferable content of the compound represented by the formula (N-2) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, 30% , 40%, 50%, 55%, 60%, 65%, 70%, 75%, and 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20% It is.

The lower limit of the preferable content of the compound represented by the formula (N-3) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, 30% , 40%, 50%, 55%, 60%, 65%, 70%, 75%, and 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20% It is.

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

The compound represented by the general formula (N-1) preferably contains one or more compounds represented by the general formula (N-11) and the general formula (N-12).

(In the formula, R ^N11 , R ^N12 , A ^N11 , A ^N12 , Z ^N11 , Z ^N12 , n ^N11 and n ^N12 are each independently R ^N11 , R ^N12 , A ^N11 , A in the general formula (N-1). ^{^{^{^{N12, Z N11, Z N12,}}}} n represents the same meaning as ^N11 and ^{n ^N121,} ^{a N121} and ^{a N212} each independently represent the same meaning as ^{a N11} in the general formula ^{(n-1), n N121} and ^{n N122} Each independently represents 0, 1 or 2, but n ^N121 + n ^N122 represents 0, 1, 2 or 3.)
Examples of the compounds represented by the general formulas (N-11) and (N-12) include compounds represented by the following general formulas (N-1a) to (N-1g).

^{(Wherein, R N11} and ^{R N12} are as defined ^{R N11} and ^{R N12} in the general formula ^{(N-1), n Na11} represents 0 or ^{1, n NB11} represents 0 or ^{1, n NC11} is ^Represents 0 or 1, n ^Nd11 represents 1 or 2, n ^Ne11 represents 1 or 2, n ^Ng11 represents 1 or 2, A ^Ne11 represents a trans-1,4-cyclohexylene group or 1,4 ^{Represents a} phenylene group, and A ^Ng11 represents a trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group, at least one of which is a 1,4-cyclohexenylene group Z ^Ne ¹¹ represents a single bond or ethylene, but at least one represents ethylene.)
The general formula (N-1e) is preferably the general formula (N-1e-1) and the general formula (N-1e-2).

^{(Wherein, R N11} and ^{R N12} are as defined ^{R N11} and ^{R N12} in the general formula ^{(N-1), n Ne11} are as defined ^{n NE11} in

formula

^{(N-1e), n Ne12} ^Represents 1 or 2, n ^Ne13 represents 0 or 1, and n ^Ne12 + n ^Ne13 represents 1 or 2.
More specifically, the compounds represented by general formula (N-11) and general formula (N-12) are more specifically represented by general formulas (N-1-1) to (N-1-21). It is preferable that it is a compound chosen from the compound group represented by this.

The compound represented by the general formula (N-1-1) is the following compound.

(In the formula, R ^N111 and R ^N112 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
R ^N111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably a propyl group, a pentyl group or a vinyl group. ^RN112 is preferably 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, and preferably an ethoxy group or a butoxy group.

The compound represented by the general formula (N-1-1) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

It is preferable to set a higher content in the case of emphasizing improved [Delta] [epsilon], to emphasize the solubility at low temperature highly effective when larger amount to set the content, when importance is attached to T _NI content Setting to a small value is highly effective. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-1) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6% %, 5%, 3%.

Further, the compound represented by the general formula (N-1-1) is a compound selected from the group of compounds represented by the formula (N-1-1.1) to the formula (N-1-1.22). Preferably, it is a compound represented by the formulas (N-1-1.1) to (N-1-1.4), and the formula (N-1-1.1) and the formula (N The compound represented by -1-1.3) is preferable.

The compounds represented by formulas (N-1-1.1) to (N-1-1.22) can be used alone or in combination. The lower limit of the preferred content of these compounds alone or with respect to the total amount is 5%, 10%, 13%, 15%, 17%, 20%, 23% 25% 27% 30% 33% 35% The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6% %, 5%, 3%.

The compound represented by the general formula (N-1-2) is the following compound.

(In the formula, R ^N121 and R ^N122 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
^RN121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group or a pentyl group. ^RN122 is preferably 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, and includes a methyl group, a propyl group, a methoxy group, an ethoxy group, or a propoxy group. preferable.

The compound represented by the general formula (N-1-2) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

When emphasizing the improvement of Δε, it is preferable to set the content higher. When emphasizing the solubility at low temperature, it is more effective to set the content lower. When emphasizing T _NI , the content is preferable. Setting a large number of is highly effective. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-2) with respect to the total amount of the composition of the present invention is 5%, 7%, 10%, 13% 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, 37% 40% and 42%. The upper limit of the preferable content is 50%, 48%, 45%, 43%, 40%, 38%, and 35% with respect to the total amount of the composition of the present invention. %, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% %, 8%, 7%, 6%, 5%.

Further, the compound represented by the general formula (N-1-2) is a compound selected from the group of compounds represented by the formula (N-1-2.1) to the formula (N-1-2.22). It is preferable that the formula (N-1-2.3) to the formula (N-1-2.7), the formula (N-1-2.10), the formula (N-1-2.11), the formula A compound represented by formula (N-1-2.13) and formula (N-1-2.20) is preferred. When importance is attached to the improvement of Δε, formula (N-1-2.3) is preferably a compound represented by the formula (N-1-2.7) _from when emphasizing improvements in _{T NI} formula (N-1-2.10), formula (N-1-2.11) And a compound represented by the formula (N-1-2.13), and when emphasizing improvement in response speed, the compound represented by the formula (N-1-2.20) Is preferred.

The compounds represented by formula (N-1-2.1) to formula (N-1-2.22) can be used alone or in combination. The lower limit of the preferable content of these compounds alone or with respect to the total amount of is 5%, 10%, 13%, 15%, 17%, 20%, 23 %, 25%, 27%, 30%, 33%, and 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6% %, 5%, 3%.

The compound represented by the general formula (N-1-3) is the following compound.

(In the formula, R ^N131 and R ^N132 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
R ^N131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. R ^N132 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 3 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and preferably a 1-propenyl group, an ethoxy group, a propoxy group or a butoxy group. .

The compound represented by the general formula (N-1-3) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

It is preferable to set a higher content in the case of emphasizing improved [Delta] [epsilon], to emphasize the solubility at low temperature highly effective when larger amount to set the content, when importance is attached to T _NI content Highly effective when set to. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-3) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

Further, the compound represented by the general formula (N-1-3) is a compound selected from the group of compounds represented by the formula (N-1-3.1) to the formula (N-1-3.21). It is preferably a compound represented by the formulas (N-1-3.1) to (N-1-3.7) and the formula (N-1-3.21). -1-3.1), formula (N-1-3.2), formula (N-1-3.3), formula (N-1-3.4) and formula (N-1-3.6) ) Is preferred.

Compounds represented by formula (N-1-3.1) to formula (N-1-3.4), formula (N-1-3.6) and formula (N-1-3.21) are used alone Can be used in combination, or can be used in combination, but the combination of formula (N-1-3.1) and formula (N-1-3.2), formula (N-1-3.3) ), Formula (N-1-3.4) and formula (N-1-3.6) are preferred. The lower limit of the preferred content of these compounds alone or with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, 20% %. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-4) is the following compound.

^{(Wherein, R N141} and ^{R N142} each independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
R ^N141 and ^{R N142} are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms carbon atoms 4-5 preferably a methyl group, a propyl group, an ethoxy Group or butoxy group is preferred.

The compound represented by the general formula (N-1-4) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-4) with respect to the total amount of the composition of the present invention is 3%, 5%, 7%, 10% 13%, 15%, 17%, 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%, 11%, 10%, and 8%.

Further, the compound represented by the general formula (N-1-4) is a compound selected from the group of compounds represented by the formula (N-1-4.1) to the formula (N-1-4.14). Preferably, it is a compound represented by the formulas (N-1-4.1) to (N-1-4.4), and the formula (N-1-4.1) and the formula (N -1-4.2) and compounds represented by formula (N-1-4.4) are preferred.

The compounds represented by the formulas (N-1-4.1) to (N-1-4.14) can be used alone or in combination, but the compounds of the present invention The lower limit of the preferable content of these compounds alone or with respect to the total amount is 3%, 5%, 7%, 10%, 13%, 15%, 17% And 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%, 11%, 10%, and 8%.

The compound represented by the general formula (N-1-5) is the following compound.

(In the formula, R ^N151 and R ^N152 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
R ^N151 and R ^N152 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, and preferably an ethyl group, a propyl group, or a butyl group. Is preferred.

The compound represented by the general formula (N-1-5) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-5) with respect to the total amount of the composition of the present invention is 5%, 8%, 10%, 13% 15%, 17%, 20%. The upper limit of the preferable content is 35%, 33%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the composition of the present invention. %, 18%, 15% and 13%.

Further, the compound represented by the general formula (N-1-5) is a compound selected from the group of compounds represented by the formula (N-1-5.1) to the formula (N-1-5.6). It is preferable that the compound represented by formula (N-1-5.1), formula (N-1-5.2) and formula (N-1-5.4) is preferable.

The compounds represented by formula (N-1-5.1), formula (N-1-5.2) and formula (N-1-5.4) may be used alone or in combination. However, the lower limit of the preferred content of these compounds alone or with respect to the total amount of the composition of the present invention is 5%, 8%, 10%, 13%, 15%, 17% and 20%. The upper limit of the preferable content is 35%, 33%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the composition of the present invention. %, 18%, 15% and 13%.

The compound represented by the general formula (N-1-10) is the following compound.

(In the formula, R ^N1101 and R ^N1102 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
R ^N1101 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group, a vinyl group or a 1-propenyl group. R ^N1102 is preferably 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, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-10) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

It is preferable to set a higher content in the case of emphasizing improved [Delta] [epsilon], to emphasize the solubility at low temperature highly effective when larger amount to set the content, when importance is attached to T _NI content Setting to a higher value is more effective. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-10) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

Further, the compound represented by the general formula (N-1-10) is a compound selected from the group of compounds represented by the formula (N-1-10.1) to the formula (N-1-10.19). Are preferably represented by the formulas (N-1-10.1) to (N-1-10.5), the formula (N-1-10.16), and the formula (N-1-10.17). And the compounds of the formula (N-1-10.1), formula (N-1-10.2), formula (N-1-10.16) and formula (N-1-10.17) are preferred. ) Is preferred.

The compounds represented by formula (N-1-10.1), formula (N-1-10.2), formula (N-1-10.16) and formula (N-1-10.17) are used alone Can be used in combination or in combination, but the lower limit of the preferred content of these compounds alone or with respect to the total amount of the composition of the present invention is 5%, 10% 13%, 15%, 17%, 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-11) is the following compound.

(In the formula, R ^N1111 and R ^N1112 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
R ^N1111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group, a vinyl group or a 1-propenyl group. R ^N1112 is preferably 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, and preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-11) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

When emphasizing the improvement of Δε, it is preferable to set the content higher. When emphasizing the solubility at low temperature, setting the content lower is more effective, and when emphasizing _TNI , the content. Setting to a higher value is more effective. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-11) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

Further, the compound represented by the general formula (N-1-11) is a compound selected from the group of compounds represented by the formula (N-1-11.1) to the formula (N-1-11.14). Preferably, it is represented by the formula (N-1-11.2), the formula (N-1-11.4), the formula (N-1-11.13) and the formula (N-1-11.14). Are preferred.

The compounds represented by formula (N-1-11.2), formula (N-1-11.4), formula (N-1-11.17) and formula (N-1-11.18) are singly Can be used in combination or in combination, but the lower limit of the preferred content of these compounds alone or with respect to the total amount of the composition of the present invention is 5%, 10% 13%, 15%, 17%, 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-12) is the following compound.

(In the formula, R ^N1121 and R ^N1122 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
^RN1121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. ^RN1122 is preferably 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, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-12) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-12) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-13) is the following compound.

(In the formula, R ^N1131 and R ^N1132 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
R ^N1131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. R ^N1132 is preferably 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, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-13) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-13) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-14) is the following compound.

(In the formula, R ^N1141 and R ^N1142 each independently represent the same meaning as R ^N11 and R ^N12 in formula (N).)
R ^N1141 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. R ^N1142 is preferably 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, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-14) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-14) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-15) is the following compound.

(In the formula, R ^N1151 and R ^N1152 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
^RN1151 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. R ^N1152 is preferably 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, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-15) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-15) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-16) is the following compound.

(In the formula, R ^N1161 and R ^N1162 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
R ^N1161 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. R ^N1162 is preferably 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, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-16) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-16) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-17) is the following compound.

(In the formula, R ^N1171 and R ^N1172 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N)).
^RN1171 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. R ^N1172 is preferably 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, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-17) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-17) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-18) is the following compound. Since the compound represented by the general formula (N-1-18) has a long molecular length and rigidity, the compound represented by the general formula (N-1-18) is contained from the viewpoint of improving contrast. It is preferable to do.

(In the formula, R ^N1181 and R ^N1182 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N)).
^RN1181 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group. R ^N1182 is preferably 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, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-18) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-18) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

Further, the compound represented by the general formula (N-1-18) is a compound selected from the group of compounds represented by the formula (N-18.1) to the formula (N-1-18.5). Preferably, it is a compound represented by the formulas (N-18.1. 1) to (N-1-11.3), and is preferably a compound represented by the formula (N-1-18.2) or the formula (N- The compound represented by 1-18.3) is preferred.

The compound represented by the general formula (N-1-20) is the following compound.

(In the formula, R ^N1201 and R ^N1202 each independently represent the same meaning as R ^N11 and R ^N12 in formula (N)).
R ^N1201 and R ^N1202 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-20) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-20) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-21) is the following compound.

(In the formula, R ^N1211 and R ^N1212 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
R ^N1211 and R ^N1212 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-21) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-21) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-22) is the following compound.

(In the formula, ^RN1221 and ^RN1222 each independently represent the same meaning as RN11 and RN12 in General Formula (N)).
R ^N1221 and R ^N1222 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group.

The compound represented by the general formula (N-1-22) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-21) with respect to the total amount of the composition of the present invention is 1%, 5%, 10%, 13% 15%, 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%, 10%, 5%.

Further, the compound represented by the general formula (N-1-22) is a compound selected from the group of compounds represented by the formula (N-1-22.1) to the formula (N-1-22.12). Preferably, it is a compound represented by formulas (N-1-22.1) to (N-1-22.5), and preferably represented by formulas (N-1-22.1) to (N- The compound represented by 1-22.4) is preferred.

The compound represented by the general formula (N-2) is preferably a compound represented by the general formula (N-2a), the general formula (N-2b) or the general formula (N-2c).

^(Wherein, R ^{^N21,} R ^N22, ^Z ^N21 and ^{X N21} represent the same meaning as ^R ^{^N21,} ^R ^N22, ^Z N21 and ^{X N21} in the general formula (N-2) each ^{independently, A N211} and A ^N212 each independently represents a 1,4-cyclohexylene group or a 1,4-phenylene group, but one —CH ₂ — present in the 1,4-cyclohexylene group or not adjacent 2 One or more —CH ₂ — may be replaced by —O— or —S—, and one hydrogen atom present in the 1,4-phenylene group is each independently replaced by a fluorine atom or a chlorine atom. At ^{best, Z N211} and ^{Z N212} each independently represent a single _{_{bond, -OCH 2 -, - CH 2}} O -, - OCF 2 -, - CF 2 O -, - CH 2 CH 2 - or _-CF 2 CF ₂ - represents a.
In the compound represented by the general formula (N-2a) or Formula ^{(N-2b), Z N21} represents a single _bond, -OCH 2 _-, - preferably represents a _CH 2 O- or _-CH 2 CH _2.

The compound represented by the general formula (N-2c) is preferably a compound represented by the following general formula (N-2c-1) to general formula (N-2c-6).

(In the formula, R ^N21 and R ^N22 each independently represent the same meaning as R ^N21 and R ^N22 in formula (N-2).)
The compound represented by the general formula (N-3) is preferably a compound represented by the general formula (N-3a), the general formula (N-3b), or the general formula (N-3c).

(Wherein R ^N31 , R ^N32 and Z ^N31 each independently represent the same meaning as R ^N31 , R ^N32 and Z ^N31 in formula (N-3), and A ^N311 and A ^N312 each independently 1 —CH ₂ — represents a 1,4-cyclohexylene group or a 1,4-phenylene group, and one —CH ₂ — present in the 1,4-cyclohexylene group or two or more —CH ₂ not adjacent to each other — May be replaced by —O— or —S—, and one hydrogen atom present in the 1,4-phenylene group may be independently replaced by a fluorine atom or a chlorine atom, and Z ^{N 311} And Z ^{N 312} each independently represents a single bond, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O—, —CH ₂ CH ₂ — or —CF ₂ CF ₂ —.
In the compound represented by the general formula (N-3a) or Formula ^{(N-3b), Z N31} represents a single _bond, -OCH 2 _-, - preferably represents a _CH 2 O- or _-CH 2 CH _2.

The compound represented by the general formula (N-3c) is preferably a compound represented by the following general formula (N-3c-1) to general formula (N-3c-3). A compound represented by the general formula (N-3c-1) is more preferable.

(In the formula, R ^N31 and R ^N32 each independently represent the same meaning as R ^N31 and R ^N32 in formula (N-3).)
R ^N31 and R ^N32 are preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a propyl group or a pentyl group.

The compound represented by the general formula (N-3c-1) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

When emphasizing the improvement of Δε, it is preferable to set the content higher. When emphasizing the solubility at low temperatures, it is more effective to set a larger content. When emphasizing TNI, the content is preferably increased. Setting it to a small value is highly effective. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-3c-1) with respect to the total amount of the composition of the present invention is 3%, 5%, 10%, 13% , 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, and 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6% % And 5%.

Further, the compound represented by the general formula (N-3c-1) is a compound selected from the group of compounds represented by the formula (N-3c-1.1) to the formula (N-3c-1.3). Preferably there is.

When the liquid crystal composition of the present invention contains two or more compounds represented by the general formulas (N-1) to (N-3), it is represented by the general formulas (N-1) to (N-3). May contain two or more compounds selected from only one of the formulas, or two or more selected from the compounds represented by the general formulas (N-1) to (N-3) You may contain 2 or more types of compounds chosen from a formula.

The liquid crystal composition of the present invention preferably contains one or more compounds represented by general formula (N-1), and is represented by general formula (N-11) or general formula (N-12). It is preferable to contain 1 type, or 2 or more types of compound to be made, and it is more preferable to contain 2 to 10 types. Specifically, it is preferable to contain one or more compounds selected from the group of compounds represented by formulas (N-1-a) to (N-1-f). A combination of compounds represented by (N-1-a) to general formula (N-1-f) is more preferable.

More specifically, it is preferable to contain one or more compounds selected from the group of compounds represented by formulas (N-1-1) to (N-1-21). A combination of compounds represented by formula (N-1-1) to general formula (N-1-21) is more preferable. Specifically, general formula (N-1-1), general formula (N-1-2), general formula (N-1-3), general formula (N-1-4), general formula (N- 1-5), one or two compounds selected from the group of compounds represented by general formula (N-1-10), general formula (N-1-11), and general formula (N-1-18) It is preferable to contain more than one species, and the general formula (N-1-1), general formula (N-1-2), general formula (N-1-3), general formula (N-1-4), general formula A combination of compounds represented by (N-1-5), general formula (N-1-10), general formula (N-1-11), and general formula (N-1-18) is preferable. More specifically, one or two compounds selected from the compound group represented by formula (N-1-10), formula (N-1-11) and formula (N-1-18) are used. It is preferable to contain more than one species, and a combination of compounds represented by general formula (N-1-10), general formula (N-1-11) and general formula (N-1-18) is preferable.

In addition, one or more compounds selected from the compound group represented by the general formula (N-1-11.17), the general formula (N-1-11.18), and the general formula (N-1-18) It is preferable to contain two or more kinds, and it is a combination of the compounds of the general formula (N-1-11.17), general formula (N-1-11.18), and general formula (N-1-18). preferable.

The total amount of the compounds represented by the general formulas (N-1) to (N-3) is preferably 10 to 90% by mass, more preferably 15 to 90% by mass, and 20 to 90% by mass. More preferably, 20 to 80% by mass is further preferable, 30 to 80% by mass is further preferable, 45 to 80% by mass is further preferable, and 45 to 75% by mass is particularly preferable.

More specifically, the total content of the compounds represented by the general formulas (N-1) to (N-3) is preferably 1% or more as a lower limit in the composition, preferably 5% Or more, preferably 10% or more, preferably 13% or more, preferably 15% or more, preferably 18% or more, preferably 20% or more, preferably 23% or more, preferably 25% or more, and 28% or more Preferably, 30% or more is preferable, 33% or more is preferable, 35% or more is preferable, 38% or more is preferable, and 40% or more is preferable. Further, the upper limit value is preferably 95% or less, preferably 90% or less, preferably 88% or less, preferably 85% or less, preferably 83% or less, preferably 80% or less, and preferably 78% or less. 75% or less, preferably 73% or less, preferably 70% or less, preferably 68% or less, preferably 65% or less, preferably 63% or less, preferably 60% or less, preferably 55% or less, 50 % Or less is preferable, and 40% or less is preferable.

The total amount of the compounds represented by the general formula (N-1-11.17) and the general formula (N-1-11.18) may be 1% or more as a lower limit in the composition. Preferably, 5% or more is contained, preferably 10% or more, preferably 13% or more, preferably 15% or more, preferably 18% or more, preferably 20% or more It is preferable to contain, preferably 23% or more, preferably 25% or more, preferably 28% or more, preferably 30% or more, preferably 33% or more. , 35% or more, preferably 38% or more, and preferably 40% or more. Further, the upper limit value is preferably 95% or less, preferably 90% or less, preferably 88% or less, preferably 85% or less, and preferably 83% or less. 80% or less, preferably 78% or less, preferably 75% or less, preferably 73% or less, preferably 70% or less, preferably 68% or less Preferably 65% or less, preferably 63% or less, preferably 60% or less, preferably 55% or less, preferably 50% or less, It is preferable to contain 40% or less.

The total amount of the compounds represented by the general formula (N-1-11.17), the general formula (N-1-11.18), and the general formula (N-1-18) is The lower limit is preferably 1% or more, preferably 5% or more, preferably 10% or more, preferably 13% or more, preferably 15% or more, 18 %, Preferably 20% or more, preferably 23% or more, preferably 25% or more, preferably 28% or more, 30% or more. It is preferable to contain 33% or more, preferably 35% or more. Further, the upper limit is preferably 80% or less, preferably 78% or less, preferably 75% or less, preferably 73% or less, and preferably 70% or less. 68% or less, preferably 65% or less, preferably 63% or less, preferably 60% or less, preferably 55% or less, preferably 50% or less The content is preferably 40% or less.

The liquid crystal composition of the present invention preferably contains one or more compounds represented by the general formula (L). The compound represented by the general formula (L) corresponds to a dielectrically neutral compound (Δε value is −2 to 2).

(Wherein R ^L1 and R ^L2 each independently 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—,
n ^L1 represents 0, 1, 2 or 3,
A ^L1 , A ^L2 and A ^L3 each independently represent (a) a 1,4-cyclohexylene group (one —CH ₂ — present in the group or two or more —CH ₂ — not adjacent to each other). May be replaced by -O-.)
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be replaced by —N═) and (c) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or 1,2 , 3,4-tetrahydronaphthalene-2,6-diyl group, one —CH═ or two or more non-adjacent —CH═ may be replaced by —N═.
The group (a), the group (b) and the group (c) may be each independently substituted with a cyano group, a fluorine atom or a chlorine atom,
Z ^L1 and Z ^L2 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —OCF ₂ -, -CF ₂ O-, -CH = NN-CH-, -CH = CH-, -CF = CF- or -C≡C-
When n ^L1 is 2 or 3, and a plurality of A ^L2 are present, they may be the same or different, and when n ^L1 is 2 or 3, and a plurality of Z ^L3 are present, May be the same or different, but excludes compounds represented by general formulas (N-1), (N-2) and (N-3). )
Although the compound represented by general formula (L) may be used independently, it can also be used in combination. 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. Alternatively, in another embodiment of the present invention, there are two types, three types, four types, five types, six types, seven types, eight types, nine types, 10 types, More than types.

In the 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 compatibility, dripping marks, image sticking, It is necessary to appropriately adjust according to required performance such as dielectric anisotropy.

The lower limit of the preferable content of the compound represented by the formula (L) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, 30%, 40 %, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferable content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, and 25%.

When the viscosity of the composition of the present invention is kept low and a 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 composition of the present invention maintains a high Tni and requires a composition having good temperature stability, the above lower limit value is preferably high and the upper limit value is preferably high. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the above lower limit value is lowered and the upper limit value is low.

When importance is attached to reliability, R ^L1 and R ^L2 are preferably both alkyl groups, and when importance is placed on reducing the volatility of the compound, it is preferably an alkoxy group, and importance is placed on viscosity reduction. In this case, at least one is preferably an alkenyl group.

The number of halogen atoms present in the molecule is preferably 0, 1, 2 or 3, preferably 0 or 1, and 1 is preferred when importance is attached to compatibility with other liquid crystal molecules.

R ^L1 and R ^L2 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 ^L1 is bonded is a phenyl group (aromatic). When the ring structure to which it is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a straight-chain C 1-5 carbon atom is preferred. Alkyl groups, linear alkoxy groups having 1 to 4 carbon atoms and linear alkenyl groups having 2 to 5 carbon atoms are preferred. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

The combination of R ^L1 and R ^L2 is not particularly limited, but both represent an alkyl group, one represents an alkyl group, the other represents an alkenyl group, or one represents an alkyl group, and the other Preferably represents an alkoxy group, or one of them represents an alkyl group, and the other represents an alkenyloxy group. When importance is attached to reliability, R ^L1 and R ^L2 are preferably both alkyl groups, and when importance is placed on reducing the volatility of the compound, it is preferably an alkoxy group, and importance is placed on viscosity reduction. In this case, at least one is preferably an alkenyl group.

In the liquid crystal composition of the present invention, at least one of R ^L1 and R ^{L2 in} the general formula (L) is represented by the following formula (LRd):

(In the formula, R ^Ld1 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, m ^Ld represents an integer of 0 to 5, and a black dot in the formula represents a carbon atom in the ring structure or a carbon atom in the ring structure. Represents an oxygen atom bonded to an atom.)
It is preferable from a viewpoint of the improvement of the contrast of a liquid crystal display element to contain 1 type, or 2 or more types of compounds which are group represented by these. Furthermore, in the compound having a group represented by the formula (LRd), the number of ring structures in the molecule is 3 or more, that is, m ⁴¹ in the compound represented by the general formula (L) is 1 or 2. It is preferable to contain one compound or two or more compounds from the viewpoint of improving the contrast of the liquid crystal display element. The total content of compounds having a group represented by the formula (LRd) and having 3 or more ring structures in the molecule is preferably 1% or more as a lower limit in the liquid crystal composition. 3% or more is preferable, 5% or more is preferable, 10% or more is preferable, 15% or more is preferable, 18% or more is preferable, 20% or more is preferable, and the upper limit value is preferably 40% or less. % Or less is preferable.

n ^L1 is preferably 0 when importance is attached to the response speed, 2 or 3 is preferred for improving the upper limit temperature of the nematic phase, and 1 is preferred for balancing these. In order to satisfy the properties required for the composition, it is preferable to combine compounds having different values.

A ^L1 , A ^L2, and A ^L3 are preferably aromatic when it is required to increase Δn, and are preferably aliphatic for improving the response speed, and are each independently trans- 1,4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1,4-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6 -It preferably represents a diyl group or a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, and more preferably represents the following structure:

More preferably, it represents a trans-1,4-cyclohexylene group or a 1,4-phenylene group.

Z ^L1 and Z ^L2 are each independently a single bond, —CH═CH—, —C≡C—, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O— , -OCF ₂ - or _-CF 2 O-, a single _{_{bond, -CH 2 CH 2 -, -}} OCF 2 - or _-CF 2 O-are more preferably a single bond in the case of emphasizing the response speed It is preferable.

The compound represented by the general formula (L) preferably has 0 or 1 halogen atom in the molecule.

It is preferable that the compound represented by the general formula (L) contains one or more compounds represented by the general formula (La).

(In the formula, R ^L1 and R ^L2 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L), and A ^La1 represents a 1,4-phenylene group or a trans-1,4-cyclohexylene group. And k ^La1 represents 1 or 2, but when k ^La1 is 2, two A ^La1 may be the same or different.)
The total content of the compound represented by the general formula (La) is preferably 1% by mass to 80% by mass, preferably 1% by mass to 70% by mass, and 1% by mass to 60% by mass. %, Preferably 10% to 50% by weight, preferably 10% to 40% by weight, and preferably 15% to 40% by weight.

More specifically, the content of the compound represented by the general formula (La) is 0.5% by mass as a lower limit in the composition (hereinafter,% in the composition represents mass%). It is preferable to contain 1% or more, preferably 3% or more, preferably 5% or more, preferably 8% or more, preferably 10% or more. Preferably, it contains 13% or more, preferably contains 15% or more, preferably contains 18% or more, and preferably contains 20% or more. Further, the upper limit is preferably 80% or less, preferably 70% or less, preferably 65% or less, preferably 60% or less, and preferably 55% or less. 50% or less, preferably 45% or less, preferably 40% or less, preferably 38% or less, preferably 35% or less, preferably 33% or less It is preferable to contain 30% or less, preferably 28% or less, and preferably 25% or less.

More specifically, the compound represented by the general formula (L) is preferably a compound selected from the group of compounds represented by the general formulas (L-1) to (L-7).

The compound represented by the general formula (L-1) is the following compound.

(In the formula, R ^L11 and R ^L12 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L).)
R ^L11 and R ^L12 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. .

The compound represented by the general formula (L-1) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content is 1%, 2%, 3%, 5%, 7%, 10%, and 15% with respect to the total amount of the composition of the present invention. %, 20%, 25%, 30%, 35%, 40%, 45%, 50%, and 55%. The upper limit of the preferable content is 95%, 90%, 85%, 80%, 75%, 70%, 65%, based on the total amount of the composition of the present invention. %, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25%.

When the viscosity of the composition of the present invention is kept low and a 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 composition of the present invention requires a high Tni and a composition having good temperature stability, it is preferable that the lower limit value is moderate and the upper limit value is moderate. 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.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-1). In order to obtain a large elastic constant, it is preferable to contain a larger amount of the compound represented by the general formula (L-1-1).

(Wherein R ^L12 represents the same meaning as in general formula (L-1).)
The compound represented by the general formula (L-1-1) is a compound selected from the group of compounds represented by the formula (L-1-1.1) to the formula (L-1-1.3). And is preferably a compound represented by formula (L-1-1.2) or formula (L-1-1.3), and particularly represented by formula (L-1-1.3). It is preferable that it is a compound.

The lower limit of the preferable content of the compound represented by the formula (L-1-1.3) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, and 10%. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, and 6% with respect to the total amount of the composition of the present invention. %, 5%, 3%.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-2). In order to obtain a low viscosity or a low rotational viscosity, it is preferable to contain a larger amount of the compound represented by the general formula (L-1-2).

(Wherein R ^L12 represents the same meaning as in general formula (L-1).)
The lower limit of the preferable content of the compound represented by the formula (L-1-2) with respect to the total amount of the composition of the present invention is 1%, 5%, 10%, 15% 17%, 20%, 23%, 25%, 27%, 30%, 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 33%, and 30%.

Further, the compound represented by the general formula (L-1-2) is a compound selected from the group of compounds represented by the formula (L-1-2.1) to the formula (L-1-2.4). Preferably, it is a compound represented by the formula (L-1-2.2) to the formula (L-1-2.4). In particular, the compound represented by the formula (L-1-2.2) is preferable because the response speed of the composition of the present invention is particularly improved. When obtaining Tni higher than the response speed, it is preferable to use a compound represented by the formula (L-1-2.3) or the formula (L-1-2.4). The content of the compounds represented by formula (L-1-2.3) and formula (L-1-2.4) is not preferably 30% or more in order to improve the solubility at low temperatures.

The lower limit of the preferable content of the compound represented by the formula (L-1-2.2) with respect to the total amount of the composition of the present invention is 10%, 15%, 18%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, 38%, and 40%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 43%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 32%, 30%, 27%, 25%, and 22%.

The lower limit of the preferable total content of the compound represented by the formula (L-1-1.3) and the compound represented by the formula (L-1-2.2) with respect to the total amount of the composition of the present invention The values are 10%, 15%, 20%, 25%, 27%, 30%, 35% and 40%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 43%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 32%, 30%, 27%, 25%, and 22%.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-3).

(Wherein R ^L13 and R ^L14 each independently represents an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms.)
R ^L13 and R ^L14 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. .

The lower limit of the preferable content of the compound represented by the formula (L-1-3) with respect to the total amount of the composition of the present invention is 1%, 5%, 10%, 13% 15%, 17%, 20%, 23%, 25%, 30%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 40%, 37%, and 35% with respect to the total amount of the composition of the present invention. %, 33%, 30%, 27%, 25%, 23%, 23%, 20%, 17%, 15%, 13%, 10% %.
Further, the compound represented by the general formula (L-1-3) is a compound selected from the group of compounds represented by the formula (L-1-3.1) to the formula (L-1-3.12). Preferably, it is a compound represented by formula (L-1-3.1), formula (L-1-3.3) or formula (L-1-3.4). In particular, the compound represented by the formula (L-1-3.1) is preferable because the response speed of the composition of the present invention is particularly improved. Further, when obtaining Tni higher than the response speed, the equation (L-1-3.3), the equation (L-1-3.4), the equation (L-1-3.11), and the equation (L− It is preferable to use a compound represented by 1-3.12). Sum of compounds represented by formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11) and formula (L-1-3.12) The content of is not preferably 20% or more in order to improve the solubility at low temperatures.

The lower limit of the preferable content of the compound represented by the formula (L-1-3.1) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferable content is 20%, 17%, 15%, 13%, 10%, 8%, and 7% with respect to the total amount of the composition of the present invention. % And 6%.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-4) and / or (L-1-5).

(In the formula, R ^L15 and R ^L16 each independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms.)
R ^L15 and R ^L16 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. .

The lower limit of the preferable content of the compound represented by the formula (L-1-4) with respect to the total amount of the composition of the present invention is 1%, 5%, 10%, 13% 15%, 17%, 20%. The upper limit of the preferable content is 25%, 23%, 20%, 17%, 15%, 13%, and 10% with respect to the total amount of the composition of the present invention. %.

The lower limit of the preferable content of the compound represented by the formula (L-1-5) with respect to the total amount of the composition of the present invention is 1%, 5%, 10%, 13% 15%, 17%, 20%. The upper limit of the preferable content is 25%, 23%, 20%, 17%, 15%, 13%, and 10% with respect to the total amount of the composition of the present invention. %.

Furthermore, the compounds represented by the general formulas (L-1-4) and (L-1-5) are represented by the formulas (L-1-4.1) to (L-1-5.3). And a compound represented by the formula (L-1-4.2) or the formula (L-1-5.2) is preferable.

The lower limit of the preferable content of the compound represented by the formula (L-1-4.2) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferable content is 20%, 17%, 15%, 13%, 10%, 8%, and 7% with respect to the total amount of the composition of the present invention. % And 6%.

Formula (L-1-1.3), Formula (L-1-2.2), Formula (L-1-3.1), Formula (L-1-3.3), Formula (L-1- 3.4), it is preferable to combine two or more compounds selected from the compounds represented by formula (L-1-3.11) and formula (L-1-3.12). -1.3), formula (L-1-2.2), formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4) and It is preferable to combine two or more compounds selected from the compounds represented by formula (L-1-4.2), and the lower limit of the preferable content of the total content of these compounds is the composition of the present invention. 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18% of the total amount 20% and 23% 25%, 27%, 30%, 33%, 35%, and the upper limit is 80% and 70% with respect to the total amount of the composition of the present invention, 60%, 50%, 45%, 40%, 37%, 35%, 33%, 30%, 28%, 25%, 23% and 20%. When emphasizing the reliability of the composition, compounds represented by formula (L-1-3.1), formula (L-1-3.3) and formula (L-1-3.4)) It is preferable to combine two or more compounds selected from the group consisting of formulas (L-1-1.3) and (L-1-2.2) when the response speed of the composition is important. It is preferable to combine two or more compounds selected from the following compounds.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-6).

(Independently ^RL17 and ^{R L18} is wherein represents a methyl group or a hydrogen atom.)
The lower limit of the preferable content of the compound represented by the formula (L-1-6) with respect to the total amount of the composition of the present invention is 1%, 5%, 10%, 15% 17%, 20%, 23%, 25%, 27%, 30%, 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 33%, and 30%.

Further, the compound represented by the general formula (L-1-6) is a compound selected from the compound group represented by the formula (L-1-6.1) to the formula (L-1-6.3). Preferably there is.

The compound represented by the general formula (L-2) is the following compound.

(In the formula, R ^L21 and R ^L22 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L).)
R ^L21 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L22 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or a carbon atom. An alkoxy group of 1 to 4 is preferable.

The compound represented by the general formula (L-2) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

When emphasizing solubility at low temperatures, it is highly effective to set a large amount of content. Conversely, when emphasizing response speed, setting a small amount of content is highly effective. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (L-2) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7% and 10%. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, and 6% with respect to the total amount of the composition of the present invention. %, 5%, 3%.

Further, the compound represented by the general formula (L-2) is preferably a compound selected from the group of compounds represented by the formulas (L-2.1) to (L-2.6). A compound represented by formula (L-2.1), formula (L-2.3), formula (L-2.4) and formula (L-2.6) is preferred.

The compound represented by the general formula (L-3) is the following compound.

(In the formula, R ^L31 and R ^L32 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L).)
R ^L31 and R ^L32 are each independently preferably 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.

The compound represented by the general formula (L-3) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (L-3) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7% and 10%. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, and 6% with respect to the total amount of the composition of the present invention. %, 5%, 3%.

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 (L-3) is preferably a compound selected from the group of compounds represented by the formulas (L-3.1) to (L-3.4). A compound represented by the formula (L-3.7) from (L-3.2) is preferable.

The compound represented by the general formula (L-4) is the following compound.

(In the formula, R ^L41 and R ^L42 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L).)
R ^L41 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L42 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or a carbon atom. An alkoxy group of 1 to 4 is preferable. )
The compound represented by the general formula (L-4) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

In the composition of the present invention, the content of the compound represented by the general formula (L-4) 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 lower limit of the preferable content of the compound represented by the formula (L-4) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40% . The upper limit of the preferable content of the compound represented by the formula (L-4) with respect to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. 20%, 15%, 10%, 5%.

The compound represented by the general formula (L-4) is, for example, a compound represented by the formula (L-4.1) to the formula (L-4.3) or the formula (L-4.11). preferable.

Depending on the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence, even if the compound represented by the formula (L-4.1) is contained, the formula (L -4.2) Even if it contains a compound represented by formula (L-4.1), it contains both a compound represented by formula (L-4.1) and a compound represented by formula (L-4.2). Or all of the compounds represented by formulas (L-4.1) to (L-4.3) may be included. The lower limit of the preferable content of the compound represented by formula (L-4.1) or formula (L-4.2) with respect to the total amount of the composition of the present invention is 3%, Yes, 7%, 9%, 11%, 12%, 13%, 18%, 21%, and the preferred upper limit is 45, 40% , 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% .

When both the compound represented by formula (L-4.1) and the compound represented by formula (L-4.2) are contained, the amount of both compounds relative to the total amount of the composition of the present invention is The lower limit of the preferred content is 15%, 19%, 24%, and 30%, and the preferred upper limit is 45, 40%, 35%, and 30%. Yes, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by the general formula (L-4) is preferably, for example, a compound represented by the formula (L-4.4) to the formula (L-4.6). It is preferable that it is a compound represented by this.

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 the formula (L-4.4) is contained, the formula (L -4.5) contains both the compound represented by formula (L-4.4) and the compound represented by formula (L-4.5). May be.

The lower limit of the preferable content of the compound represented by the formula (L-4.4) or the formula (L-4.5) with respect to the total amount of the composition of the present invention is 3%, Yes, 7%, 9%, 11%, 12%, 13%, 18%, 21%. Preferred upper limit values are 45, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13% %, 10%, and 8%.

When both the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5) are contained, the amount of both compounds relative to the total amount of the composition of the present invention is The lower limit of the preferred content is 15%, 19%, 24%, and 30%, and the preferred upper limit is 45, 40%, 35%, and 30%. Yes, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by the general formula (L-4) is preferably a compound represented by the formula (L-4.7) to the formula (L-4.10), and particularly the formula (L-4. The compound represented by 9) is preferred.

The compound represented by the general formula (L-5) is the following compound.

(In the formula, R ^L51 and R ^L52 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L).)
R ^L51 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L52 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or a carbon atom. An alkoxy group of 1 to 4 is preferable.

The compound represented by the general formula (L-5) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

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

The lower limit of the preferable content of the compound represented by the formula (L-5) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40% . The upper limit of the preferable content of the compound represented by the formula (L-5) with respect to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. , 20%, 15%, 10%, 5% The compound represented by the general formula (L-5) is represented by the formula (L-5.1) or the formula (L-5.2). The compound represented by formula (L-5.1) is particularly desirable.

The lower limit of the preferable content of these compounds with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, and 7%. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, and 9%.

The compound represented by the general formula (L-5) is represented by the formula (L-5.3) or (L-5.4).
The lower limit of the preferable content of these compounds with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, and 7%. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, and 9%.

The compound represented by the general formula (L-5) is preferably a compound selected from the group of compounds represented by the formula (L-5.5) to the formula (L-5.7).

The compound represented by the general formula (L-6) is the following compound.

(In the formula, R ^L61 and R ^L62 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L), and X ^L61 and X ^L62 each independently represent a hydrogen atom or a fluorine atom. )
R ^L61 and R ^L62 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and one of X ^L61 and X ^L62 is a fluorine atom and the other is a hydrogen atom. Is preferred.

The compound represented by the general formula (L-6) can be used alone, or two or more compounds can be used in combination. 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, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (L-6) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40% . The upper limit of the preferable content of the compound represented by the formula (L-6) with respect to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. 20%, 15%, 10%, 5%. When emphasizing to increase Δn, it is preferable to increase the content, and when emphasizing the precipitation at low temperature, it is preferable to decrease the content.

The compound represented by the general formula (L-6) is preferably a compound represented by the formula (L-6.1) to the formula (L-6.9).

There are no particular restrictions on the types of compounds that can be combined, but 1 to 3 types of these compounds are preferably contained, more preferably 1 to 4 types. Further, since the wide molecular weight distribution of the selected compound is also effective for the solubility, for example, one type of the compound represented by the formula (L-6.1) or (L-6.2), the formula (L- 6.4) or one type from the compound represented by (L-6.5), one type from the compound represented by formula (L-6.6) or formula (L-6.7), It is preferable to select one compound from the compounds represented by -6.8) or (L-6.9) and combine them as appropriate. Among them, represented by formula (L-6.1), formula (L-6.3), formula (L-6.4), formula (L-6.6) and formula (L-6.9). It is preferable to include a compound.

Further, the compound represented by the general formula (L-6) is preferably, for example, a compound represented by the formula (L-6.10) to the formula (L-6.17). A compound represented by L-6.11) is preferable.

The compound represented by the general formula (L-7) is the following compound.

^{(Wherein, R L71} and ^{R L72} each independently represent the same meaning as ^{R L1} and ^{R L2} in Formula ^{(L), A L71} and ^{A L72} is ^{A L2} and in the general formula (L) independently A ^L3 represents the same meaning, but the hydrogen atoms on A ^L71 and A ^L72 may be each independently substituted with a fluorine atom, Z ^L71 represents the same meaning as Z ^L2 in formula (L), X ^L71 and X ^L72 each independently represent a fluorine atom or a hydrogen atom.)
In the formula, R ^L71 and R ^L72 are each independently preferably 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 ^L71 and A ^L72 Are each independently preferably a 1,4-cyclohexylene group or a 1,4-phenylene group, the hydrogen atoms on A ^L71 and A ^L72 may be each independently substituted with a fluorine atom, and Z ^L71 is a single group. A bond or COO- is preferable, a single bond is preferable, and X ^L71 and X ^L72 are preferably a hydrogen atom.

There are no particular restrictions on the types of compounds that can be combined, but they are combined according to the 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, two kinds, three kinds, and four kinds.

In the composition of the present invention, the content of the compound represented by the general formula (L-7) includes solubility at low temperature, transition temperature, electrical reliability, birefringence index, process suitability, dripping marks, It is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

The lower limit of the preferable content of the compound represented by the formula (L-7) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7%, 10%, 14%, 16%, 20%. The upper limit of the preferable content of the compound represented by the formula (L-7) with respect to the total amount of the composition of the present invention is 30%, 25%, 23%, and 20%. 18%, 15%, 10%, 5%.

When an embodiment with high Tni is desired for the composition of the present invention, the content of the compound represented by formula (L-7) is preferably increased, and when an embodiment with low viscosity is desired, the content is It is preferable to reduce the amount.

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.1) to the formula (L-7.4), and the formula (L-7. It is preferable that it is a compound represented by 2).

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.11) to the formula (L-7.13). It is preferable that it is a compound represented by 11).

Furthermore, the compound represented by the general formula (L-7) is a compound represented by the formula (L-7.21) to the formula (L-7.23). A compound represented by formula (L-7.21) is preferable.

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.31) to the formula (L-7.34), and the formula (L-7. 31) or / and a compound represented by the formula (L-7.32).

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.41) to the formula (L-7.44), and the formula (L-7. 41) or / and a compound represented by formula (L-7.42).

Furthermore, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.51) to the formula (L-7.53).

The 1,4-cyclohexylene group in the present application is preferably a trans-1,4-cyclohexylene group.

The liquid crystal composition of the present invention preferably contains one or more compounds selected from the compound group represented by formulas (L-1) to (L-7). -1) to a combination of compounds represented by formula (L-7) is more preferable. Specifically, it is preferable to contain one or more compounds selected from the compound group represented by general formula (L-1), general formula (L-4) and general formula (L-5). A combination of the compounds represented by formula (L-1), formula (L-4) and formula (L-5) is preferable. Further, the general formula (L-1-1), general formula (L-1-2), general formula (L-1-1.3), general formula (L-1-2.2), general formula (L- 4.3), one compound selected from the group of compounds represented by formula (L-5.3), formula (L-5.4), and formula (L-5.8) or It is preferable to contain two or more kinds, general formula (L-1-1), general formula (L-1-2), general formula (L-4.3), general formula (L-5.3), and A combination of the compounds represented by formula (L-5.4) and formula (L-5.8) is preferable.

The total content of the compounds represented by general formula (L-1), general formula (L-4) and general formula (L-5) may be 1% or more as the lower limit in the composition. Preferably, 5% or more, preferably 10% or more, preferably 13% or more, preferably 15% or more, preferably 18% or more, preferably 20% or more, preferably 23% or more, preferably 25% or more, 28% or more is preferable, 30% or more is preferable, 33% or more is preferable, 35% or more is preferable, 38% or more is preferable, and 40% or more is preferable. Moreover, as an upper limit, 95% or less is preferable, 90% or less is preferable, 88% or less is preferable, 85% or less is preferable, 83% or less is preferable, 80% or less is preferable, 78% or less is preferable, 75% The following is preferred, 73% or less is preferred, 70% or less is preferred, 68% or less is preferred, 65% or less is preferred, 63% or less is preferred, 60% or less is preferred, 55% or less is preferred, 50% or less is preferred Preferably, it is 40% or less.

The total amount of the compound selected from the group of compounds represented by formulas (N-1) to (N-3) and the compound represented by formula (L) with respect to the total amount of the composition of the present invention The lower limit values are 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97 %, 98%, 99%, 100%. The upper limit of the preferable content is 100%, 99%, 98%, 95%, 90%, 85%, and 80%. Further, a compound selected from the group of compounds represented by formulas (N-1a) to (N-1f) and a compound represented by formula (L) with respect to the total amount of the composition of the present invention. The lower limit of the total amount is 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96% 97%, 98%, 99%, 100%. The upper limit of the preferable content is 100%, 99%, 98%, 95%, 90%, 85%, and 80%.

The general formula (N-1) to the general formula (N—) having a group represented by the formula (NRd) with respect to the total amount of the composition of the present invention and having three or more ring structures in the molecule. The total amount of the compound represented by 3) and the compound represented by the general formula (L) having a group represented by the general formula (LRd) and having three or more ring structures in the molecule When the Tni of the liquid crystal composition is 85 ° C. or lower, the lower limit value is preferably 8% or more, preferably 10% or more, preferably 15% or more, preferably 18% or more, and 20% or more. It is preferably 25% or more, preferably 30% or more, and the upper limit is 80% or less, 70% or less, 60% or less, and 50% or less.
When Tni of the liquid crystal composition is greater than 85 ° C. and 95 ° C. or less, the lower limit value is preferably 5% or more, preferably 8% or more, preferably 10% or more, preferably 15% or more, and 18% or more. Is preferably 20% or more, preferably 25% or more, preferably 30% or more, and the upper limit is 80% or less, 70% or less, and 60% or less. Yes, it is 50% or less.
When Tni of the liquid crystal composition is higher than 95 ° C., it is preferably 0% to 80%.

The 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 emphasizing the reliability and long-term stability of the composition, the content of the compound having a carbonyl group is preferably 5% or less, more preferably 3% or less with respect to the total mass of the composition. Preferably, it is more preferably 1% or less, and most preferably not substantially contained.

When importance is attached to the stability by UV irradiation, the content of the compound substituted with chlorine atoms is preferably 15% or less, preferably 10% or less, based on the total mass of the composition. % Or less, preferably 5% or less, more preferably 3% or less, and still more preferably substantially not contained.

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 % Or more, more preferably 90% or more, still more preferably 95% or more, and the composition is composed only of a compound in which all of the ring structures in the molecule are all 6-membered rings. Most preferably.

In order to suppress deterioration due to oxidation of the 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 as the total mass of the composition. On the other hand, it is preferably 10% or less, preferably 8% or less, more preferably 5% or less, preferably 3% or less, and still more preferably 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% or less, more preferably 8% or less, based on the total mass of the composition. It is more preferably 5% or less, further preferably 3% or less, and still more preferably substantially not contained.

“Substantially not contained” in the present application means that it is not contained except for an unintentionally contained product.

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 number of carbon atoms of the alkenyl group is preferably 4 to 5, and the unsaturated bond of the alkenyl group and benzene are directly bonded. Preferably not.

The composition of the present invention may contain a polymerizable compound in order to produce a liquid crystal display device such as a transverse electric field type PSA mode or a transverse electric field type PSVA mode. A composition containing a polymerizable compound is a liquid crystal display in which the polymerizable compound contained therein is polymerized by ultraviolet irradiation to impart liquid crystal alignment ability, and the amount of transmitted light is controlled by utilizing the birefringence of the composition. Used for devices. 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, the general formula (XX)

(Wherein, 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, Preferably bonded to 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 1,4-phenylene groups in the formula have an arbitrary hydrogen atom substituted with a fluorine atom. Also good. ) Is preferred.

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 at least one of them is a single bond in a PSA display element. A compound in which both represent a single bond or one in which 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, 1 to 4 alkyl groups are 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 Are preferred, —COO—, —OCO— or a single bond is more preferred, and a single bond is particularly preferred.

M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond in which any hydrogen atom may be substituted by a fluorine atom, but the 1,4-phenylene group or the single bond is preferable. When C represents a ring structure other than a single bond, Z ²⁰¹ is preferably a linking group other than a single bond. 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, the following formulas (XXa-1) to (XXa-5) are preferably represented, It is more preferable to represent the formula (XXa-3) from (XXa-1), and it is particularly preferable to represent the formula (XXa-1).

(In the formula, both ends shall be 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.

From the above, as the polymerizable monomer, general formula (XX-1) to general formula (XX-4) are particularly preferable, and among them, general formula (XX-2) is most preferable.

(In the formula, Sp ²⁰ represents an alkylene group having 2 to 5 carbon atoms.)
In the case of adding a monomer to the 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 composition in the present invention may further contain one or more additives such as an antioxidant, a photo-antioxidant, a light stabilizer, an ultraviolet absorber, and an infrared absorber. As an antioxidant, the compound represented by general formula (Q) can be contained.

(Wherein, R ^Q represents a straight-chain alkyl group or branched alkyl group having from 1 22 carbon atoms, one or two or more CH ₂ groups in the alkyl group, so that the oxygen atoms are not directly adjacent a, -O -, - CH = CH -, - CO -, - OCO -, - COO -, - C≡C -, - CF 2 O -, - OCF 2 - may be replaced by, ^{M Q} is trans Represents a 1,4-cyclohexylene group, a 1,4-phenylene group or a single bond.)
^RQ represents a straight-chain alkyl group or a branched-chain alkyl group having 1 to 22 carbon atoms, and one or more CH ₂ groups in the alkyl group are —O—so that oxygen atoms are not directly adjacent to each other. —, —CH═CH—, —CO—, —OCO—, —COO—, —C≡C—, —CF ₂ O—, —OCF ₂ — may be substituted. Linear alkyl group, linear alkoxy group, linear alkyl group in which one CH ₂ group is substituted with —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 20 carbon atoms, a linear alkyl group in which one CH ₂ group is substituted with —OCO— or —COO—, branched Chain alkyl group, branched alkoxy group, one CH ₂ group Is more preferably a branched alkyl group substituted with —OCO— or —COO—. ^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 preferred.

More specifically, the compound represented by the general formula (Q) is preferably a compound represented by the following general formula (Qa) to general formula (Qd).

In the formula, R ^Q1 is preferably a linear or branched alkyl group having 1 to 10 carbon atoms, R ^Q2 is preferably a linear or branched alkyl group having 1 to 20 carbon atoms, and R ^Q3 is A straight-chain alkyl group having 1 to 8 carbon atoms, a branched-chain alkyl group, a straight-chain alkoxy group or a branched-chain alkoxy group is preferred, and L ^Q is preferably a straight-chain alkylene group or branched-chain alkylene group having 1 to 8 carbon atoms. . Of the compounds represented by general formula (Qa) to general formula (Qd), compounds represented by general formula (Qc) and general formula (Qd) are more preferable.

More specifically, the following compounds (III-1) to (III-40) are preferred as antioxidants or light stabilizers that can be used in the present invention.

(In the formula, n represents an integer of 0 to 20.)
The composition of the present invention preferably contains one or more compounds represented by general formula (Q) or compounds selected from general formulas (III-1) to (III-38). It is further preferable to contain 5 types, and the content is preferably 0.001 to 1%, more preferably 0.001 to 0.1%, and particularly preferably 0.001 to 0.05%.

The value of the dielectric anisotropy Δε of the liquid crystal composition in the present invention has a negative dielectric anisotropy, and the absolute value of the dielectric anisotropy is 2 or more. The value of the dielectric anisotropy Δε is preferably −2.0 to −6.0 at 25 ° C., more preferably −2.5 to −5.0, and −2.5 to -4.0 is particularly preferable. More specifically, it is preferably -2.5 to -3.4 when the response speed is important, and -3 when the drive voltage is important. It is preferable that it is from .4 to -4.0.

The value of the refractive index anisotropy Δn of the liquid crystal composition in the present invention is preferably 0.08 to 0.13 at 25 ° C., more preferably 0.09 to 0.12. More specifically, it is preferably 0.10 to 0.12 when corresponding to a thin cell gap, and preferably 0.08 to 0.10 when corresponding to a thick cell gap.

The rotational viscosity (γ ₁ ) of the liquid crystal composition in the present invention is preferably 150 or less, more preferably 130 or less, and particularly preferably 120 or less.

In the liquid crystal composition of the present invention, it is preferable that Z as a function of rotational viscosity and refractive index anisotropy shows a specific value.

(In the formula, γ ₁ represents rotational viscosity, and Δn represents refractive index anisotropy.)
Z is preferably 13000 or less, more preferably 12000 or less, and particularly preferably 11000 or less.

The nematic phase-isotropic liquid phase transition temperature (T _ni ) of the liquid crystal composition in the present invention is 60 ° C. or higher, preferably 75 ° C. or higher, more preferably 80 ° C. or higher, and still more preferably 90 ° C. It is above ℃.

The liquid crystal composition of the present invention needs to have a specific resistance of 10 ¹² (Ω · m) or more, preferably 10 ¹³ (Ω · m), and more preferably 10 ¹⁴ (Ω · m) or more.

The liquid crystal composition of the present invention may contain a normal nematic liquid crystal, a smectic liquid crystal, a cholesteric liquid crystal, etc. in addition to the above-mentioned compounds, but the chemical stability of the liquid crystal composition is required. In some cases, it is preferable not to have a chlorine atom in the molecule, and when the stability of the liquid crystal composition to light such as ultraviolet rays is required, the conjugated length represented by a naphthalene ring is long and the absorption peak is in the ultraviolet region. It is desirable that the molecule does not have a condensed ring or the like in which there exists.
(Liquid crystal display element)
The liquid crystal composition of the present invention as described above is applied to an IPS mode liquid crystal display element having the following constitution. An example of an IPS mode liquid crystal display device according to the present invention will be described with reference to FIGS.

FIG. 1 is a diagram schematically showing a configuration of a liquid crystal display element. In FIG. 1, for convenience of explanation, each component is illustrated separately. As shown in FIG. 1, the configuration of the liquid crystal display element 10 according to the present invention is an IPS mode having a liquid crystal layer 5 sandwiched between a first substrate 2 and a second substrate 7 that are arranged opposite to each other. In the liquid crystal display element, the liquid crystal layer 5 is composed of the liquid crystal composition of the present invention described above.

The first substrate 2 has an electrode layer 3 formed on the surface on the liquid crystal layer 5 side. Further, between the liquid crystal layer 5 and each of the first substrate 2 and the second substrate 7, a pair of alignment films 4 that directly contact the liquid crystal composition constituting the liquid crystal layer 5 to induce homogeneous alignment are provided. The liquid crystal molecules in the liquid crystal composition are aligned so as to be substantially parallel to the first substrate 2 and the second substrate 7 when no voltage is applied. As shown in FIGS. 1 and 3, the first substrate 2 and the second substrate 7 may be sandwiched between a pair of

polarizing plates

1 and 8. Furthermore, as shown in FIG. 1, a color filter 6 may be provided between the second substrate 7 and the alignment film 4.

That is, the liquid crystal display element 10 according to the present invention includes a first polarizing plate 1, a first substrate 2, an electrode layer 3, an alignment film 4, a liquid crystal layer 5 containing a liquid crystal composition, an alignment film 4, The color filter 6, the second substrate 7, and the second polarizing plate 8 are sequentially stacked. The first substrate 2 and the second substrate 7 can be made of a flexible material such as glass or plastic, at least one of which is a transparent material and the other is a transparent material, such as metal or silicon. An opaque material may be used. The two substrates are bonded together by a sealing material and a sealing material such as an epoxy thermosetting composition disposed in the peripheral region, and in order to maintain the distance between the substrates, for example, glass particles, Spacer columns made of granular spacers such as plastic particles and alumina particles or a resin formed by photolithography may be arranged.

FIG. 2 is an enlarged plan view of a part of the region surrounded by the II line of the electrode layer 3 formed on the first substrate 2 in FIG. As shown in FIG. 2, the electrode layer 3 including a thin film transistor formed on the surface of the first substrate 2 includes a plurality of gate bus lines 24 for supplying scanning signals and a plurality of data for supplying display signals. Bus lines 25 are arranged in a matrix so as to cross each other. In FIG. 2, only a pair of gate bus lines 24 and a pair of data bus lines 25 are shown.

A unit pixel of the liquid crystal display device is formed by a region surrounded by the plurality of gate bus lines 24 and the plurality of data bus lines 25, and the first electrode 21 and the second electrode 22 are formed in the unit pixel. ing. A thin film transistor including a source electrode 27, a drain electrode 26, and a gate electrode 28 is provided in the vicinity of an intersection where the gate bus line 24 and the data bus line 25 intersect each other. The thin film transistor is connected to the first electrode 21 as a switch element that supplies a display signal to the first electrode 21. A common line 23 is provided in parallel with the gate bus line 24. The common line 23 is connected to the second electrode 22 in order to supply a common signal to the second electrode 22. The gate bus line 24, the data bus line 25, and the common line 23 are preferably metal films, more preferably Al, Cu, Au, Ag, Cr, Ta, Ti, Mo, W, Ni or alloys thereof, Mo, The case of using Al or its alloy wiring is particularly preferable.

FIG. 3 is a cross-sectional view of the liquid crystal display element shown in FIG. 1 taken along the line III-III in FIG. On the first substrate 2, a gate insulating layer 32 provided so as to cover the gate bus line 24 (not shown in FIG. 3) and to cover substantially the entire surface of the first substrate 2, and the surface of the gate insulating layer 32 The line-shaped first electrode 21 and the line-shaped second electrode 22 are provided on the insulating protective film 31 so as to be separated from each other. The insulating protective layer 31 is a layer having an insulating function, and is formed of silicon nitride, silicon dioxide, silicon oxynitride film, or the like.

The color filter 6 is preferably formed with a black matrix (not shown) in a portion corresponding to the thin film transistor from the viewpoint of preventing light leakage.

On the electrode layer 3 and the color filter 6, a pair of alignment films 4 that are in direct contact with the liquid crystal composition constituting the liquid crystal layer 5 and induce homogeneous alignment are provided. The alignment film 4 is composed of, for example, a rubbed polyimide film.

The polarizing plate 1 and the polarizing plate 8 can be adjusted so that the viewing angle and the contrast become good by adjusting the polarization axis of each polarizing plate so that their transmission axes operate in a normally black mode. It is preferable to have transmission axes perpendicular to each other. In particular, any one of the polarizing plate 1 and the polarizing plate 8 is preferably arranged so as to have a transmission axis parallel to the alignment direction of the liquid crystal molecules when no voltage is applied. Further, the refractive index anisotropy Δn of the liquid crystal composition is preferably adjusted according to the thickness (H) of the liquid crystal layer so that the contrast is maximized. Furthermore, a retardation film for widening the viewing angle can also be used.

In the embodiment shown in FIGS. 2 and 3, the first electrode 21 and the second electrode 22 are comb-shaped electrodes formed on the insulating protective layer 31, that is, on the same layer, and are engaged with each other at a distance. It is provided in the state. Here, the interelectrode distance G between the first electrode 21 and the second electrode 22 and the thickness H of the liquid crystal layer satisfy the relationship of G ≧ H. The distance between electrodes: G represents the shortest distance in the horizontal direction on the substrate between the first electrode 21 and the second electrode 22, and in the example shown in FIGS. 2 and 3, the first electrode 21 and the second electrode 22 The distance in the vertical direction is expressed with respect to the line formed by alternately engaging the electrodes 22. The thickness of the liquid crystal layer: H represents the shortest distance between the outermost surfaces of the first substrate 2 and the second substrate 7, specifically, provided on each of the first substrate 2 and the second substrate 7. The distance between the alignment films 4 (outermost surfaces) represents the thickness of the liquid crystal layer as shown in FIG.

In the present invention, the difference between the interelectrode distance G between the first electrode and the second electrode: G and the thickness of the liquid crystal layer: H preferably satisfies the relationship 0 ≦ GH−0.5 μm. When a liquid crystal composition having a large elastic constant is used, a larger driving voltage is required, but the driving voltage can be lowered by satisfying the above relationship. In the present invention, a liquid crystal composition having a large elastic constant is used, but by using the liquid crystal composition of the present invention and satisfying the relationship of 0 ≦ GH ≦ 0.5 μm, the driving voltage is reduced, Response speed can be further improved. GH is preferably greater than 0, preferably 0.5 or less, preferably 0.4 or less, preferably 0.3 or less, and preferably 0.2 or less. Preferably, it is 0.15 or less, and preferably 0.1 or less.

The IPS type liquid crystal display element drives liquid crystal molecules by using an electric field in a horizontal direction with respect to a substrate surface formed between the first electrode 21 and the second electrode. The electrode width Q of the first electrode 21 and the electrode width R of the second electrode 22 are preferably formed to such a width that all the liquid crystal molecules in the liquid crystal layer 5 can be driven by the generated electric field. Specifically, the electrode width: W of at least one of the first electrode and the second electrode is preferably 3 μm or less from the viewpoint of transmittance, and the electrode width of the first electrode 21: Q and the second electrode The electrode width of 22: It is preferable that both electrode widths of R be 3 μm or less. The electrode width represents the width (line width) in the minor axis direction of a line formed by alternately engaging the first electrode 21 and the second electrode 22.

In the present invention, the distance between the first electrode and the second electrode: G and the electrode width: W of at least one of the first electrode and the second electrode are such that GW ≦ 3 μm. It is preferable to satisfy. The electrode width: W of at least one of the first electrode and the second electrode may be the electrode width: Q of the first electrode 21 or the electrode width: R of the second electrode 22, It is preferred to mean both Q and R electrode widths. By using the liquid crystal composition of the present invention and setting GW ≦ 3 μm, the driving voltage can be further lowered and the response speed can be further improved. From the viewpoint of lowering the driving voltage and preventing the reduction of transmittance, the lower limit value of GW is preferably 0 or more, preferably 0.1 or more, and preferably 0.1 or more. 0.2 or more, preferably 0.3 or more, and more preferably 0.5 or more. The upper limit is preferably 2.8 or less, preferably 2.5 or less, preferably 2.3 or less, preferably 2.0 or less, and 1.5 or less. Preferably, it is preferably 1.3 or less, preferably 1.2 or less, and preferably 1.1 or less.

In the present invention, it is preferable to satisfy the relationship of 0 ≦ GH ≦ 0.5 μm or satisfy the relationship of GW ≦ 3 μm. However, the relationship of 0 ≦ GH ≦ 0.5 μm is satisfied, It is more preferable to satisfy the relationship of GW ≦ 3 μm.

FIG. 4 is a diagram schematically showing the alignment direction of the liquid crystal induced by the alignment film 4. In the present invention, a liquid crystal composition having negative dielectric anisotropy is used. Therefore, the x axis and the major axis of the liquid crystal molecules 30 are defined with the x axis being the direction perpendicular to the line forming the comb shape of the first electrode 21 and the second electrode 22 (the direction in which the horizontal electric field is formed). Orientation is preferably made so that the angle θ formed with the direction is approximately 0 to 45 °. In the example shown in FIG. 4, an example in which the angle θ formed by the x axis and the major axis direction of the liquid crystal molecules 30 is approximately 0 ° is shown. The angle θ formed by the x-axis and the major axis direction of the liquid crystal molecules 30 is preferably 0 to 40 °, more preferably 0 to 35 °, and even more preferably 0 to 30 ° C. The reason for inducing the alignment direction of the liquid crystal is to increase the maximum transmittance and contrast of the liquid crystal display device.

The IPS-type liquid crystal display device 10 configured as described above supplies an image signal (voltage) to the first electrode 21 via the thin film TFT, whereby an electric field is generated between the first electrode 21 and the second electrode 22. The liquid crystal is driven by this electric field. That is, in a state where no voltage is applied, the liquid crystal molecules 30 are arranged so that the major axis direction thereof is parallel to the alignment direction of the alignment film 4. When a voltage is applied, the liquid crystal molecules 30 in the liquid crystal layer 5 in accordance with the applied voltage are inclined such that the major axis direction of the liquid crystal molecules is constant with respect to the line in which the first electrodes 21 and the second electrodes 22 are alternately formed. Orient. Note that the liquid crystal molecules 30 shown in FIG. 4 are schematically shown for explaining the movement of the liquid crystal molecules constituting the liquid crystal composition, and do not mean only specific liquid crystal molecules.

The IPS liquid crystal display element described with reference to FIGS. 1 to 4 is an example, and can be implemented in various other forms without departing from the technical idea of the present invention. For example, FIG. 5 is an example showing another configuration of the first electrode 21 and the second electrode 22 formed in the pixel. FIG. 6 is another example in which the liquid crystal display element shown in FIG. 1 is cut in the direction of the line III-III in FIG. As shown in FIG. 6, the second electrode 22 is provided on the gate insulating layer 32, the second electrode is mostly the insulating protective layer 31, the first electrode 21 is provided on the insulating protective layer 31, and the first electrode 21 is provided. The second electrode 22 may be provided on different layers.

The liquid crystal display element of the present invention can form the electrode layer 3 by forming a wiring on the first substrate 2 by sputtering a metal material such as the electrode layer Al or its alloy. Further, the color filter 6 can be produced by, for example, a pigment dispersion method, a printing method, an electrodeposition method, a dyeing method, or the like. 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 created. Further, the color filter may be provided on the side of the substrate having a TFT or the like.

The first substrate 2 and the second substrate 7 are opposed to each other so that the electrode layer 3 and the alignment film 4 side are on the inner side. At this time, the interval between the substrates may be adjusted via a spacer. In this case, it is preferable to adjust the thickness of the liquid crystal layer to be 1 to 100 μm. The thickness of the liquid crystal layer is preferably 1 to 20 μm, preferably 1 to 15 μm, preferably 1 to 10 μm, preferably 1.3 to 10 μm, preferably 1.5 to 10 μm, preferably 1.5 to 8 μm. 5 to 5 μm is preferable, 1.5 to 4 μm is preferable, 1.8 to 3.5 μm is preferable, and 2.0 to 3 μm is preferable. 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 thickness (H) of the liquid crystal layer 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. 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 composition between two substrates, a normal vacuum injection method or a drop injection (ODF: One Drop Fill) method can be used, but a drop mark is not generated in the vacuum injection method. However, in the present invention, it can be suitably used for a display element manufactured using the ODF method. In the ODF liquid crystal display device manufacturing process, a sealant such as epoxy photothermal combination 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 composition under air. In the present invention, in the ODF method, it is possible to suppress the occurrence of dripping marks when the liquid crystal composition is dropped on the substrate. In addition, a dripping mark is defined as a phenomenon in which a mark in which a liquid crystal composition is dripped appears white when displaying black.

The occurrence of dripping marks is greatly affected by the liquid crystal material to be injected, but the influence is unavoidable depending on the configuration of the display element. In the IPS mode liquid crystal display element, the thin film transistor formed in the display element, the first electrode 21 having the comb shape or the slit, the second electrode 22 and the like are thin alignment film 4 or thin alignment film 4 and thin. Since there is only a member that separates the liquid crystal composition, such as the insulating protective layer 31, etc., there is a high possibility that the ionic substance cannot be completely blocked, and the occurrence of dripping marks due to the interaction between the metal material constituting the electrode and the liquid crystal composition is avoided. However, by using the liquid crystal composition of the present invention in combination in an IPS type liquid crystal display element, the occurrence of dripping marks can be effectively suppressed.

Moreover, in the manufacturing process of the liquid crystal display element by the ODF method, it is necessary to drop an optimal liquid crystal injection amount according to the size of the liquid crystal display element. The liquid crystal display element can be kept at a high yield because liquid crystal can be stably dropped over a long period of time with little influence on abrupt pressure change or impact in the apparatus. In particular, small liquid crystal display elements that are frequently used in smartphones that have been popular recently are difficult to control the deviation from the optimal value within a certain range because the optimal liquid crystal injection amount is small. By using an object, a stable discharge amount of a liquid crystal material can be realized even in a small liquid crystal display element.

When the liquid crystal composition of the present invention contains a polymerizable compound, an appropriate polymerization rate is desirable for obtaining a good alignment performance of the liquid crystal as a method for polymerizing the polymerizable compound, such as ultraviolet rays or electron beams. A method in which the active energy rays are polymerized by irradiating them in a single or a combination or sequentially. When ultraviolet rays are used, a polarized light source or a non-polarized light source may be used. Further, when the polymerization is carried out in a state where the polymerizable compound-containing composition is sandwiched between two substrates, at least the substrate on the irradiated surface side must be given adequate transparency to the active energy rays. Don't be. 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 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 at the time of irradiation is preferably within a temperature range in which the liquid crystal state of the 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-ray to irradiate, it is preferable to irradiate the ultraviolet-ray of the wavelength range which is not the absorption wavelength range of a composition, and it is preferable to cut and use an ultraviolet-ray as needed. The intensity of the irradiated ultraviolet light is preferably 0.1 mW / cm 2 to 100 W / cm 2, more preferably 2 mW / cm 2 to 50 W / cm 2. 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 following abbreviations are used for the description of compounds in the examples. Note that n represents a natural number.
(Side chain)
-N -C _n H _{2n + 1} linear alkyl group with n carbon atoms n- C _n H _{2n + 1} -linear alkyl group with n carbon atoms -On -OC _n H _{2n + 1} linear chain with n carbon atoms -Like alkoxyl group nO- C _n H _{2n + 1} O- linear alkoxyl group having n carbon atoms -V -CH = CH ₂
V- CH ₂ = CH-
-V1 -CH = CH-CH ₃
1V- CH ₃ —CH═CH—
_{_{-2V -CH 2 -CH 2 -CH = CH}} 3
V2- CH ₂ = CH-CH ₂ -CH _2-
-2V1 -CH ₂ -CH ₂ -CH = CH-CH ₃
1V2- CH ₃ —CH═CH—CH ₂ —CH ₂
(Linking group)
-N- -C _n H _2n-
—NO— —C _n H _2n —O—
—On— —O—C _n H _2n —
—COO— —C (═O) —O—
-OCO- -OC (= O)-
—CF ₂ O——CF ₂ —O—
-OCF2- -O-CF _2-
(Ring structure)

In the examples, the measured characteristics are as follows.

T _ni : Nematic phase-isotropic liquid phase transition temperature (° C.)
Δn: Refractive index anisotropy at 20 ° C. Δε: Dielectric anisotropy at 20 ° C. η: Viscosity at 20 ° C. (mPa · s)
γ ₁ : rotational viscosity at 20 ° C. (mPa · s)
K ₁₁ : elastic constant K ₁₁ (pN) at 20 ° C.
K ₃₃ : Elastic constant at 20 ° C. K ₃₃ (pN)
Drive voltage evaluation: The drive voltage at 20 ° C. of the IPS type liquid crystal display element was measured by an electro-optic measuring device DMS703 manufactured by Autoronic. The obtained numerical values were evaluated as follows.

◎: Less than 8.5 V ○: 8.5 or more and less than 10 △: 10 or more and less than 11.5 ×: 13.0 or more Response speed evaluation: The response speed at 20 ° C. of an IPS type liquid crystal display element is measured with an electro-optic measuring device DMS703 manufactured by Autoronic. did. The obtained numerical values were evaluated as follows.

◎: Less than 9.0 ms ○: 9.0 or more and less than 10 ms △: 10 or more and less than 11.0 ms ×: 11.0 ms or more Contrast evaluation: The electro-optical characteristics of an IPS type liquid crystal display element were measured by an electro-optic measuring device DMS703 manufactured by Autoronic. , “Maximum luminance / minimum luminance” was calculated as a contrast parameter. The numerical values of the obtained parameters were evaluated in four stages as follows.

A: 1600 or more ○: 1400 or more but less than 1600 Δ: 1200 or more but less than 1400 ×: less than 1200 (Examples 1 to 9, Comparative Examples 1 to 3)
Liquid crystal compositions of Examples 1 to 9 and Comparative Examples 1 to 3 having the following compositions were prepared, and their physical property values were measured. The results are shown in the following table.

Using the liquid crystal compositions of Examples 1 to 9 and Comparative Examples 1 to 3, the thickness H of the liquid crystal layer was 3 μm, the distance G between the electrodes was 3 μm, the electrode width W was 2 μm (the width Q of the first electrode was 2 μm, An IPS mode liquid crystal display device having the configuration shown in FIG. 3 in which the width R of the second electrode was 2 μm was produced. Evaluation results of drive voltage, response speed, and contrast of these liquid crystal display elements were performed.

The symbol on the left side of the content is an abbreviation for the above compound.

It can be seen that the liquid crystal compositions of Examples 1 to 9 have T _NI in a practical range as a liquid crystal composition for TV, have a large absolute value of Δε, and have an optimal Δn. When the liquid crystal display elements of Examples 1 to 9 and Comparative Examples 1 to 3 were compared, the driving voltage showed almost the same result, but the liquid crystal display elements of Comparative Examples 1 to 3 had poor contrast and response speed. The result was inferior. It was found that high contrast can be obtained by applying the liquid crystal composition of the present invention to a device.

(Example 10)
Using the liquid crystal composition of Example 2, the thickness H of the liquid crystal layer was 3.8 μm, the inter-electrode distance G was 4 μm, the electrode width W was 2.3 μm (the first electrode width Q was 2.3 μm, the second An IPS mode liquid crystal display device having the configuration shown in FIG. 3 having an electrode width R of 2.3 μm was produced.

(Example 11)
Using the liquid crystal composition of Example 2, the thickness H of the liquid crystal layer was 4 μm, the inter-electrode distance G was 4.8 μm, the electrode width W was 3.4 μm (the first electrode width Q was 3 μm, the second electrode An IPS mode liquid crystal display element having a configuration shown in FIG. 3 having a width R of 3 μm was manufactured.

(Example 12)
Further, using the liquid crystal composition of Example 2, the thickness H of the liquid crystal layer is 5.5 μm, the inter-electrode distance G is 6.5 μm, the electrode width W is 3 μm (the width Q of the first electrode is 3 μm, the second An IPS mode liquid crystal display device having the configuration shown in FIG. 3 having an electrode width R of 3 μm was produced.

The evaluation results of the driving voltage, response speed, and contrast of the liquid crystal display elements of Examples 10 to 12 were performed.

The difference between the distance G between the first electrode and the second electrode and the thickness H of the liquid crystal layer (GH), or the difference between the distance G between the electrodes and the electrode width W (GW) is carried out. The liquid crystal display element of Example 10 and Example 11 larger than Example 2 and Example 12 in which (GH) and (GW) are larger than Example 2 has a result that driving voltage and response speed are inferior. However, high contrast was obtained. (Comparative Example 4)
Using the liquid crystal composition of Comparative Example 2, the thickness H of the liquid crystal layer is 5.5 μm, the inter-electrode distance G is 6.5 μm, the electrode width W is 3 μm (the first electrode width Q is 2.3 μm, the second An IPS mode liquid crystal display device having the configuration shown in FIG. 3 having an electrode width R of 2.3 μm was produced.

The difference between the electrode distance G between the first electrode and the second electrode and the thickness H of the liquid crystal layer (GH) or the difference between the electrode distance G and the electrode width W (GW) The liquid crystal display element of Comparative Example 4 which is larger than Comparative Example 2 was inferior in driving voltage and response speed as compared with Comparative Example 2.

1, 8 Polarizing plate 2 First substrate 3 Electrode layer 4 Alignment film 5 Liquid crystal layer 6 Color filter 7 Second substrate 21 First electrode 22 Second electrode 23 Common line 24 Gate bus line 25 Data bus line 26 Drain electrode 27 Source electrode 28 Gate electrode 30 Liquid crystal molecule 31 Insulating protective layer 32 Insulating layer H Thickness W of liquid crystal layer Electrode width Q of at least one of first electrode and second electrode Q Electrode width R of first electrode R Width of second electrode

Claims

Sandwiching a liquid crystal layer containing a liquid crystal composition between the first substrate, the second substrate, and the first substrate and the second substrate disposed opposite to each other;
A first electrode on the first substrate; a plurality of gate bus lines and data bus lines arranged in a matrix;
A thin film transistor provided at an intersection of the gate bus line and the data bus line, and a second electrode driven by the transistor for each pixel;
Having an alignment film layer for inducing homogeneous alignment between the liquid crystal layer and the first substrate and / or the second substrate;
The distance between the first electrode and the second electrode: G and the thickness of the liquid crystal layer: H satisfy the relationship G ≧ H,
A liquid crystal display device, wherein the liquid crystal composition has a negative dielectric anisotropy and a bend elastic constant (K 33 ) of 17 pN or more.
The liquid crystal composition has the general formulas (N-1), (N-2) and (N-3)

(Wherein, R N11 , R N12 , R N21 , R N22 , R N31 and R N32 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent 2 in the alkyl group Two or more —CH 2 — may be each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
A N11 , A N12 , A N21 , A N22 , A N31, and A N32 are each independently (a) a 1,4-cyclohexylene group (one —CH 2 — or adjacent to each other in this group). And two or more —CH 2 — may be replaced by —O—) and (b) a 1,4-phenylene group (one —CH═ present in this group or not adjacent 2 More than one -CH = may be replaced by -N =.)
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be replaced by —N═. )
(D) represents a group selected from the group consisting of 1,4-cyclohexenylene groups, and the groups (a), (b), (c) and (d) are each independently a cyano group, It may be substituted with a fluorine atom or a chlorine atom,
Z N11 , Z N12 , Z N21 , Z N22 , Z N31 and Z N32 are each independently 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—,
XN21 represents a hydrogen atom or a fluorine atom,
T N31 represents —CH 2 — or an oxygen atom,
n N11 , n N12 , n N21 , n N22 , n N31, and n N32 each independently represent an integer of 0 to 3, but n N11 + n N12 , n N21 + n N22, and n N31 + n N32 are each independently When there are a plurality of A N11 to A N32 and Z N11 to Z N32 , they may be the same or different. )
The liquid crystal composition according to claim 1, comprising one or more compounds represented by the formula:
The liquid crystal composition further comprises the general formula (L)

(Wherein R L1 and R L2 each independently 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—,
n L1 represents 0, 1, 2 or 3,
A L1 , A L2 and A L3 each independently represent (a) a 1,4-cyclohexylene group (one —CH 2 — present in the group or two or more —CH 2 — not adjacent to each other). May be replaced by -O-.)
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be replaced by —N═) and (c) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or 1,2 , 3,4-tetrahydronaphthalene-2,6-diyl group, one —CH═ or two or more non-adjacent —CH═ may be replaced by —N═.
The group (a), the group (b) and the group (c) may be each independently substituted with a cyano group, a fluorine atom or a chlorine atom,
Z L1 and Z L2 are each independently a single bond, —CH 2 CH 2 —, — (CH 2 ) 4 —, —OCH 2 —, —CH 2 O—, —COO—, —OCO—, —OCF 2 -, -CF 2 O-, -CH = NN-CH-, -CH = CH-, -CF = CF- or -C≡C-
When n L1 is 2 or 3, and a plurality of A L2 are present, they may be the same or different, and when n L1 is 2 or 3, and a plurality of Z L3 are present, May be the same or different, but excludes compounds represented by general formulas (N-1), (N-2) and (N-3). )
The liquid crystal display element of Claim 1 or 2 containing 1 type, or 2 or more types of compounds represented by these.
In the general formulas (N-1), (N-2) and (N-3), at least one of R N11 , R N12 , R N21 , R N22 , R N31 and R N32 is represented by the following formula (NRd )

(In the formula, R Nd1 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, m Nd represents an integer of 0 to 5, and a black dot in the formula represents a carbon atom in the ring structure or a carbon in the ring structure. Represents an oxygen atom bonded to an atom.)
N N11 + n N12 in the compounds represented by the general formulas (N-1), (N-2) and (N-3) having the group represented by the formula (NRd) , N N21 + n N22 and n N31 + n N32 are liquid crystal display elements according to any one of claims 2 or 3, containing one or more compounds representing 2 or 3.
In the general formula (L), at least one of R 44 and R 45 is represented by the following formula (LRd):

(In the formula, R Ld1 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, m Ld represents an integer of 0 to 5, and a black dot in the formula represents a carbon atom in the ring structure or a carbon atom in the ring structure. Represents an oxygen atom bonded to an atom.)
In a group represented by and the liquid crystal display device according to any one of claims 3 or 4 m 41 contains one or more compounds which are 1 or 2.
In the compounds represented by the general formulas (N-1), (N-2) and (N-3) having a group represented by the formula (NRd) and having a group represented by the formula (NRd) N N11 + n N12 , n N21 + n N22 and n N31 + n N32 are 2 or 3, and a compound having a group represented by the formula (LRd) and m 41 is 1 or 2 The liquid crystal composition according to claim 5, wherein the total amount of is 5% by mass or more in the liquid crystal composition.
7. The liquid crystal composition according to claim 1, further comprising one or more additives selected from an antioxidant, a photo-antioxidant, a light stabilizer, an ultraviolet absorber and an infrared absorber. The liquid crystal display element according to one item.
The difference between the distance between the first electrode and the second electrode: G and the thickness of the liquid crystal layer: H satisfies a relationship of 0 ≦ GH−0.5 μm. A liquid crystal display element according to claim 1.
The distance between the first electrode and the second electrode: G and the electrode width of the first electrode and / or the second electrode: W satisfy the relationship of GW ≦ 3 μm. Liquid crystal display element as described in any one of these.
10. The liquid crystal display element according to claim 1, wherein an electrode width: W of the first electrode and / or the second electrode is 3 μm or less.
The liquid crystal display element according to any one of claims 1 to 10, wherein the first electrode and the second electrode are formed in the same layer.