JP6660574B2 - Liquid crystal display device - Google Patents

Description

  The present invention relates to a liquid crystal composition and a liquid crystal display device using the same.

  Liquid crystal display elements are used in watches, calculators, various household electrical appliances, industrial measuring instruments, automobile panels, mobile phones, smartphones, notebook PCs, tablet PCs, televisions, and the like. Typical liquid crystal display systems are TN (twisted nematic), STN (super twisted nematic), GH (guest / host), IPS (in-plane switching), and FFS (fringe field switching). , OCB (optically compensated birefringence) type, ECB (voltage controlled birefringence) type, VA (vertical alignment) type, CSH (color super homeotropic) type, FLC (ferroelectric liquid crystal) and the like. Examples of the driving method include a static driving method, a multiplex driving method, a simple matrix method, and an active matrix (AM) method driven by a TFT (thin film transistor) or a TFD (thin film diode). In these display modes, IPS mode, FFS mode, ECB mode, VA mode, CSH mode, and the like use a liquid crystal composition (n-type liquid crystal composition) having a negative dielectric anisotropy (Δε). It is known to exhibit advantageous properties.

  A mainstream display method using an n-type liquid crystal composition is represented by a VA type, a PSA (Polymer Sustained Alignment) type in which a polymerizable compound is polymerized in a liquid crystal phase to control alignment, or a PSVA (Polymer Stable Optimized Alignment) type. Vertical alignment method and horizontal alignment method represented by IPS type and FFS type. The vertical alignment method is characterized by a wide viewing angle, a high transmittance, a high contrast, and a fast response speed, and is mainly used for large display devices such as TVs and monitors. On the other hand, the horizontal alignment method is used in mobile devices such as smartphones and tablet PCs from the viewpoints of a wide viewing angle, high transmittance, low power consumption, and optimality with a touch panel, and is further used in liquid crystal televisions. Is also progressing.

  As a liquid crystal composition having a negative Δε, a liquid crystal composition using the following liquid crystal compounds (A) and (B) having a 2,3-difluorophenylene skeleton (see Patent Document 1) is disclosed.

  This liquid crystal composition uses the liquid crystal compounds (C) and (D) as liquid crystal compounds having a Δε of about 0, but has a sufficiently low viscosity in a liquid crystal composition such as a liquid crystal television which requires a high-speed response. It has not been realized.

  On the other hand, a liquid crystal composition using the liquid crystal compound (E) has already been disclosed, but a liquid crystal composition having a small refractive index anisotropy (Δn) obtained by combining the above liquid crystal compound (D) (see Patent Document 2). And a liquid crystal composition to which a liquid crystal compound (F) is added to improve the response speed (see Patent Document 3).

  In addition, a liquid crystal composition using the liquid crystal compound (G) and the liquid crystal compound (F) has already been disclosed (see Patent Document 4), but a higher response speed has been required.

Furthermore, the liquid crystal compound (I) having a large Δn and a large bending elastic constant (K ₃₃ ).

Are disclosed (see Patent Literature 5), but an even faster response speed and a higher voltage holding ratio (VHR) have been required.

  From the above, all liquid crystal compositions have been required to achieve both a high response speed and a high VHR required for a liquid crystal display element at a higher level.

  Patent Document 6 discloses that the response speed of a homeotropic liquid crystal cell is improved by using a liquid crystal material having a large index represented by (Equation 1). However, the disclosed liquid crystal materials did not show sufficient performance.

_{(Wherein, K 33} is the elastic constant, [Delta] n is the refractive index anisotropy, .gamma.1 represents rotational viscosity.)
Also, in Non-Patent Document 1, it is known that the response speed of a liquid crystal material is expressed by the following equation regardless of the driving method.

Here, τ _off is the response speed when the voltage is not applied to the voltage applied state, γ ₁ is the rotational viscosity of the liquid crystal material, d is the thickness of the liquid crystal layer, and k is the elastic constant. Therefore, it can be seen that an increase in reduction and k of universally gamma ₁ in reducing the response speed is effective.

  Next, the front contrast ratio (hereinafter referred to as contrast) in the liquid crystal display device has a finite value (hereinafter referred to as black brightness) instead of zero in black display. Therefore, in white display determined by the effective transmittance of the liquid crystal panel. It is defined by a value obtained by dividing luminance (hereinafter, white luminance) by black luminance. Therefore, the contrast can be increased by increasing the white luminance and / or the black luminance as small as possible. In general, the contribution is greater when the black luminance is reduced.

  It is known that the liquid crystal material undergoes thermal motion, causing light scattering and increasing the black luminance to lower the contrast. The cause of increasing the black luminance here is light leakage in the front direction of the liquid crystal display (perpendicular to the liquid crystal layer). This effect is generally greater in the horizontal alignment mode than in the vertical alignment mode.

  In Patent Literature 7 and Non-Patent Literature 2, the following equation is proposed for light leakage caused by the liquid crystal layer, and has been experimentally confirmed.

Here, I in the formula is the light leakage of the liquid crystal layer (transmittance is observed when placed orthogonally polarizing plates) intensity, S _lc scattering index, [Delta] n is the refractive index anisotropy of the liquid crystal material, n _e the extraordinary refractive index, n _o is the ordinary refractive index, d is the thickness of the liquid crystal layer, K is means an average elastic constant _can be expressed as _{(K 11 + K 22 + K} 33) / 3. _{Incidentally, K 11} represents an elastic constant of the elastic constants of the _{spread, K 22} is the elastic constant of _{torsion, K 33} bends. Since these [Delta] n, n _e, n _o and d is substantially fixed in the panel design, the liquid crystal composition, [Delta] n, n _e, while satisfying n _o (required to a value of going to [Delta] n × d.) , K are required to be increased, and by achieving this, the black luminance of the liquid crystal display element can be reduced and the contrast can be improved.

From the above, in the liquid crystal composition, a nematic phase-isotropic liquid phase transition temperature (T _NI ) is high, a solid phase-nematic phase transition temperature (T _CN ) is low, and excellent low-temperature storage stability is essential. Further, it is required that the rotational viscosity (γ ₁ ) is sufficiently small, the refractive index anisotropy (Δn) is large, and the elastic constant (k or K) is large. It has been required to achieve both high response speed and high contrast.

JP-A-8-104869 EP-A-0474062 JP 2006-037054A JP-A-2001-354967 JP-A-2017-52960 JP 2006-301643 Patent No. 4682376

EKISHO Vol. 5 No. 3 p. 253 (63) 2001 EKISHO Vol. 13 No. 2 p. 119 (35) 2009

  The problem to be solved by the present invention is to provide a liquid crystal composition having improved response speed and contrast ratio while satisfying the above-mentioned various properties required for a liquid crystal composition, and to provide a liquid crystal display device using the same. That is.

  The present inventor has studied various liquid crystal compounds and various chemical substances, and found that the aforementioned problems can be solved by selecting and adjusting the contents thereof, and have completed the present invention. .

  The liquid crystal composition of the present invention satisfies various characteristics required for the liquid crystal composition, has improved response speed and contrast ratio, and has excellent display characteristics. Particularly, a liquid crystal composition having a negative dielectric anisotropy (Δε) exhibits excellent characteristics. The liquid crystal display element of the present invention can provide a liquid crystal display element of a VA type, an FFS type, an IPS type, or the like. This liquid crystal display element is suitable for a mobile phone, a smartphone, a notebook PC, a tablet PC, an in-vehicle LCD, a PID (Public Information Display), a TV, a monitor, and the like.

  Hereinafter, unless otherwise specified,% means mass%.

  The composition of the present invention contains a compound represented by the formula (i), and further comprises one or two compounds selected from the group of compounds represented by the general formulas (N-1d) and (N-1) Contains the above compounds.

( ^Wherein , R ^Nd11 and R ^Nd12 each independently represent 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 May be substituted by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-,
n ^Nd11 represents 1, 2 or 3. )

(Wherein, R ^N11 and R ^N12 each independently represent 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 May be substituted by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-,
n ^N11 and n ^N12 each independently represent 0, 1, 2 or 3, while n ^N11 + n ^N12 represents 1, 2 or 3;
A ^N11 and A ^N12 are each independently
(A) 1,4-cyclohexylene group, (this is present in the group one -CH ₂ - - or nonadjacent two or more -CH ₂ may be replaced by -O-.)
(B) 1,4-phenylene group (one -CH = or two or more non-adjacent -CH = present in this group 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 =.)
It represents a group selected from the group consisting of the above group (a), group (b) and group (c) is one of -CH 2 present in the alkyl group (in this group independently _- or adjacent Two or more non-CH ₂ — may be replaced by —O—), an alkenyl group (one —CH ₂ — or two or more non-adjacent —CH present in this group) _2- may be replaced by -O-), a cyano group, a fluorine atom or a chlorine atom,
Z ^N11 and ^{Z N12} 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 -, - represents CF = CF- or -C≡C-,
When a plurality of A ^N11 and / or A ^N12 exist, they may be the same or different. When a plurality of Z ^N11 and / or Z ^N12 exist, they may be the same or different. However, the compound represented by the general formula (N-1d) is excluded. )
The lower limit of the preferable content of the compound represented by the formula (i) in the liquid crystal composition of the present invention is 1%, 2%, 3%, 5%, and 6%, which is preferable. The upper limit of the content is 15%, 13%, 12%, 10%, 8%, and 7%. A higher content is preferable for improving the response speed and the contrast ratio, but a higher content is not preferable when emphasizing low-temperature storage stability.

  The compound represented by the general formula (N-1d) corresponds to a dielectrically negative compound (the sign of Δε is negative and its absolute value is larger than 2).

  As the compound represented by the general formula (N-1d), one type may be used alone, or two or more types may be used in combination. Three or four or more kinds can be used in combination.

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

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

( ^Wherein , R ^Nd11 and R ^Nd12 each independently represent 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 May be substituted by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-,
n ^Nd11 represents 1, 2 or 3. )
As the compound represented by the general formula (N-1d), one type may be used alone, or two or more types may be used.

In the general formula (N-1d), R ^Nd11 represents an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkenyl having 2 to 8 carbon atoms. An oxy group is preferable, and 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. Alkyl groups having 1 to 5 carbon atoms or alkenyl groups having 2 to 5 carbon atoms are more preferable, alkyl groups having 2 to 5 carbon atoms or alkenyl groups having 2 to 3 carbon atoms are more preferable, and alkenyl having 3 carbon atoms is more preferable. The group (propenyl group) is particularly preferred. 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 are preferable. In order to stabilize the nematic phase, the total of carbon atoms and, if present, oxygen atoms is preferably 5 or less, and is preferably linear.

  Particularly preferred are ethyl and propyl groups.

^RNd12 is preferably an alkyl group having 1 to 8 carbon atoms, an alkoxy 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, 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 more preferable, 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. . 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 are preferable. In order to stabilize the nematic phase, the total of carbon atoms and, if present, oxygen atoms is preferably 5 or less, and is preferably linear.

  Particularly preferred are methoxy and ethoxy groups.

n ^Nd11 is preferably 1 or 2, and it is preferable that both a compound in which n ^Nd11 is 1 and a compound in which n ^Nd11 is 2 are contained.

One or two compounds in which n ^Nd11 is 1 can be used, but from the viewpoint of improvement of the minimum temperature of the nematic phase, it is preferable to use two ^compounds, and in the case of using two ^compounds , R ^Nd11 is used. It is preferable that the same substituent is used.

One or two of the compounds in which n ^Nd11 is 2 can be used, but from the viewpoint of improvement of the minimum temperature of the nematic phase, it is preferable to use two of them, and in the case of using two, R ^Nd12 is used. It is preferable that the same substituent is used.

When both the compound having n ^Nd11 of 1 and the compound having n ^Nd11 of 2 are used, it is preferable to use more of the compound having n ^Nd11 of 2.

  As the compound represented by the general formula (N-1d), a compound represented by the general formula (N-1-10) and a compound represented by the compound represented by the general formula (N-1-11) are preferable. .

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

^{(Wherein, R N1101} and ^{R N1102} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1101 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, a butyl group, a vinyl group or a 1-propenyl group. ^RN1102 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 more preferably an ethoxy group, a propoxy group or a butoxy group.

  The compound represented by 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

It is preferable to set the content higher when emphasizing the improvement of Δε. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing T _NI , the content is higher. Setting to a higher value is more effective. Further, in order to improve dripping marks and seizure 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) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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-1-10.21). It is preferable that they are present, and are represented by the formulas (N-1-10.1) to (N-1-10.5), the formulas (N-1-10.20) and the formula (N-1-10.21). The compound is preferably a compound represented by the formula (N-1-10.1), the formula (N-1-10.2), the formula (N-1-10.20), and the formula (N-1-10.21) The compound represented by Formula (N-1-10.1) and Formula (N-1-10.2) is preferable, and the compound represented by Formula (N-1-10.2) is preferable. Are preferred.

  Compounds represented by formula (N-1-10.1), formula (N-1-10.2), formula (N-1-10.20) and formula (N-1-10.21) are used alone. Or a combination thereof. However, the lower limit of the preferred content of these compounds alone or in the total amount of the composition of the present invention is 3% and 5%. , 8%, 10%, 13%, and 15%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on the total amount of the composition of the present invention. %.

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

^{(Wherein, R N1111} and ^{R N1112} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, a butyl group, a vinyl group or a 1-propenyl group. ^RN1112 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 more preferably an ethoxy group, a propoxy group or a butoxy group.

  The compound represented by 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is set lower. When the T _NI is emphasized, the content is higher. Setting to a higher value is more effective. Further, in order to improve dripping marks and seizure 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) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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 formulas (N-1-11.1) to (N-1-11.14). And preferably represented by the formulas (N-1-11.2), (N-1-11.4), (N-1-11.11) and (N-1-1.14). Preferably, the compound is

  The compounds represented by the formula (N-1-11.2) and the formula (N-1-11.4) can be used alone or in combination. The lower limit of the preferred content of these compounds, alone or based on the total amount, is 3%, 5%, 8%, 10%, 13%, and 15%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on the total amount of the composition of the present invention. %, 15%, and 13%.

  Formula (N-1-10.1), Formula (N-1-10.2), Formula (N-1-11.2), Formula (N-1-11.4), Formula (N-1-1) It is preferable to use three to six compounds selected from the compounds represented by formulas (11.11) and (N-1-11.14), and formulas (N-1-10.1) and (N- It is preferable to use a combination of the compounds represented by formulas (1-1-1) and (N-11.4), and formulas (N-1-10.1) and (N-1-10.2). ), A combination of the compounds represented by the formulas (N-1-11.2) and (N-1-11.4) is preferably used, and the formulas (N-1-10.2) and (N-1-10.2) It is preferable to use a combination of the compounds represented by formula (1-11-111) and the formula (N-1-11.14).

As the compound represented by the general formula (N-1), one type may be used alone, or two or more types may be used. The compound represented by the general formula (N-1) corresponds to a dielectrically negative compound (the sign of Δε is negative and its absolute value is larger than 2).
The compound represented by the general formula (N-1) is the following compound.

(Wherein, R ^N11 and R ^N12 each independently represent 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 May be substituted by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-,
n ^N11 and n ^N12 represent 0, 1, 2 or 3, while n ^N11 + n ^N12 represents 1, 2 or 3;
Independently A ^N11 and ^{A N12,} respectively (a) 1,4-cyclohexylene group (this is present in the group one -CH ₂ - or nonadjacent two or more -CH ₂ - is -O And (b) a 1,4-phenylene group (one -CH = or two or more non-adjacent -CH = present in the group is replaced with -N =) May be done.)
(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 = or two or more non-adjacent -CH = present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group may be replaced by -N =. )
It represents a group selected from the group consisting of the above group (a), group (b) and group (c) is one of -CH 2 present in the alkyl group (in this group independently _- or adjacent Two or more non-CH ₂ — may be replaced by —O—), an alkenyl group (one —CH ₂ — or two or more non-adjacent —CH present in this group) _2- may be replaced by -O-), a cyano group, a fluorine atom or a chlorine atom,
Z ^N11 and ^{Z N12} 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 -, - represents CF = CF- or -C≡C-,
When a plurality of A ^N11 and / or A ^N12 exist, they may be the same or different. When a plurality of Z ^N11 and / or Z ^N12 exist, they may be the same or different. However, the compound represented by the general formula (N-1) excludes the compound represented by the general formula (N-1d). )
The compound represented by the general formula (N-1) is preferably a compound having a negative Δε and an absolute value greater than 3.

In the general formula (N-1), R ^N11 and R ^N12 are each independently an alkyl group having 1 to 8 carbon atoms, an alkoxy 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 is preferable, and 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 alkenyl group having 2 to 5 carbon atoms. An alkenyloxy group is preferable, an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms is more preferable, and an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms is further preferable. An alkenyl group having 3 carbon atoms (propenyl group) is particularly preferred.

  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 it is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a linear alkyl group having 1 to 5 carbon atoms, A C1-C4 alkoxy group and a linear C2-C5 alkenyl group are preferred. In order to stabilize the nematic phase, the total of carbon atoms and, if present, oxygen atoms is preferably 5 or less, and is preferably linear.

  The alkenyl group is preferably selected from groups represented by any of formulas (R1) to (R5). (The black dots in each formula represent carbon atoms in the ring structure.)

  Preferably, they are an alkyl group having 1 to 5 carbon atoms and an alkoxy group having 1 to 5 carbon atoms, and are a methyl group, an ethyl group, a propyl group, a methoxy group, an ethoxy group and a propoxy group.

A ^N11 and A ^N12 are preferably aromatic when it is required to independently increase Δn, and are preferably aliphatic in order to improve the response speed, and 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- It preferably represents a diyl group, a decahydronaphthalene-2,6-diyl group or a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, more preferably represents the following structure,

A trans-1,4-cyclohexylene group, 1,4-cyclohexenylene group or 1,4-phenylene group is preferred, and a trans-1,4-cyclohexylene group or 1,4-phenylene group is more preferred.

Z ^N11 and ^{Z N12} are each _{independently -CH 2 O -, - CF 2} O -, - CH 2 CH 2 -, - CF 2 CF 2 - or preferably a single bond, _-CH 2 O-, -CH ₂ CH ₂ - or a single bond is more preferable, _-CH 2 O-or a single bond is particularly preferred.

n ^N11 + n ^N12 is 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, a combination in which n ^N11 is 1 and n ^N12 is 1 A certain combination, in which n ^N11 is 2 and n ^N12 is 1, is preferred.

  However, the compound represented by the general formula (N-1d) is excluded.

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

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

  When a composition having a high response speed is required while keeping the viscosity of the composition of the present invention low, the lower limit is preferably lower and the upper limit is preferably lower. Furthermore, when the composition of the present invention is required to have a high Tni and a composition having good temperature stability, the lower limit is preferably lower and the upper limit is lower. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable that the lower limit is set higher and the upper limit is set higher.

  Examples of the compound represented by the general formula (N-1) include compounds represented by the following general formulas (N-1a) to (N-1g).

(Wherein, R ^N11 and R ^N12 represent the same meaning as R ^N11 and R ^N12 in formula (N-1), n ^Na11 represents 0 or 1, n ^Nb11 represents 1 or 2, and n ^Nc11 represents ^Represents 0 or 1, n ^Ne11 represents 1 or 2, n ^Nf11 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 And Z ^{Ne 11} represents a single bond or ethylene, but at least one represents ethylene.)
More specifically, the compound represented by the general formula (N-1) may be a compound selected from the group of compounds represented by the general formulas (N-1-1) to (N-1-21). preferable.

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

^{(Wherein, R N111} and ^{R N112} each independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more 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 more preferably an ethoxy group or a butoxy group.

    The compound represented by 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing _TNI , the content is higher. The effect is high if is set to a small value. Further, in order to improve dripping marks and seizure 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) based on the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17%, 20%, 23%, 25%, 27%, 30%, 33% and 35%. The upper limit of the preferred content is 50%, 40%, 38%, 35%, 33%, 30%, 28%, or 40% based on the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6% %, 5%, and 3%.

  Further, the compound represented by the general formula (N-1-1) is a compound selected from the compound group represented by the formula (N-1-1.1) to the formula (N-1-1.23). It is preferable that they are compounds represented by the formulas (N-1-1.1) to (N-1-1.4), and the compounds represented by the formulas (N-1-1.1) and (N-1.1) Compounds represented by 1-1.3) are preferred.

  The compounds represented by the 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 to the total amount is 5%, 10%, 13%, 15%, 17%, 20%, 23% , 25%, 27%, 30%, 33%, and 35%. The upper limit of the preferred content is 50%, 40%, 38%, 35%, 33%, 30%, 28%, or 40% based on the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6% %, 5%, and 3%.

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

(Wherein, R ^N121 and R ^N122 each independently represent the same meaning as R ^N11 and R ^N12 in 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 more 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 is preferably a methyl group, a propyl group, a methoxy group, an ethoxy group or a propoxy group. preferable.

    The compound represented by the 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, the effect is high when the content is set lower. When the T _NI is emphasized, the content is increased. Setting a higher value is more effective. Further, in order to improve dripping marks and seizure 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) relative 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% And 40% and 42%. The upper limit of the preferable content is 50%, 48%, 45%, 43%, 40%, 38%, 35%, or 50% based on the total amount of the composition of the present invention. %, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% %, 8%, 7%, 6%, and 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 there are formulas (N-1-2.3) to (N-1-2.7), (N-1-2.10), (N-1-2.11), Compounds represented by formula (N-1-2.13) and formula (N-1-2.20) are preferable, and when importance is attached to improvement of Δε, formula (N-1-2.3) And the compound represented by the formula (N-1-2.7) is preferable. When emphasis is placed on the improvement of T _NI , the compound represented by the formula (N-1-2.10) or the formula (N-1-2.11) And a compound represented by the formula (N-1-2.13), and when emphasis is placed on improving the response speed, a compound represented by the formula (N-1-2.20) Is preferred.

  The compounds represented by the formulas (N-1-2.1) to (N-1-2.22) 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 of is 5%, 10%, 13%, 15%, 17%, 20%, 23% %, 25%, 27%, 30%, 33%, and 35%. The upper limit of the preferred content is 50%, 40%, 38%, 35%, 33%, 30%, 28%, or 40% based on the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6% %, 5%, and 3%.

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

^{(Wherein, R N131} and ^{R N132} each independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group or a butyl group. ^RN132 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 more preferably a 1-propenyl group, an ethoxy group, a propoxy group or a butoxy group. .

  The compound represented by the 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, 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 The effect is high if you set the value to roughly. Further, in order to improve dripping marks and seizure 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) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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), and more preferably a compound represented by the formula (N -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 Formulas (N-1-3.1) to (N-1-3.4), Formula (N-1-3.6), and Formula (N-1-3.21) are solely Can be used in combination or in combination, but the combination of the formulas (N-1-3.1) and (N-1-3.2) and the formula (N-1-3.3) ), Two or three combinations selected from the formulas (N-1-3.4) and (N-1-3.6). The lower limit of the preferred content of these compounds, alone or based on the total amount of the composition of the present invention, is 5%, 10%, 13%, 15%, 17%, and 20%. %. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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).)
Independently R ^N141 and ^{R N142} are each an alkyl group having 1 to 5 carbon atoms, preferably an alkenyl group or an alkoxy group having 1 to 4 carbon atoms carbon atoms 4-5, methyl group, propyl group, ethoxy Or butoxy groups are preferred.

  The compound represented by the 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing _TNI , the content is higher. The effect is high if is set to a small value. Further, in order to improve dripping marks and seizure 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-1-4) relative to the total amount of the composition of the present invention is 3%, 5%, 7%, and 10%. And 13%, 15%, 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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). It is preferable that they are compounds represented by the formulas (N-1-4.1) to (N-1-4.4), and the compounds represented by the formulas (N-1-4.1) and (N-4.1) -1-4.2) and a compound represented by the formula (N-1-4.4).

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

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

  The compound represented by the 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, the effect is high when the content is set lower. When the T _NI is emphasized, the content is increased. Setting a higher value is more effective. Further, in order to improve dripping marks and seizure 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-1-5) relative to the total amount of the composition of the present invention is 5%, 8%, 10%, 13% , 15%, 17%, and 20%. The preferred upper limit of the content is 35%, 33%, 30%, 28%, 25%, 23%, 20%, or 35% based on 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 compound group represented by the formula (N-1-5.1) from the formula (N-1-5.1). The compound represented by the formula (N-1-5.1), the formula (N-1-5.2) and the formula (N-1-5.4) is preferable.

  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. Although the lower limit of the preferable content of these compounds alone or based on the total amount of the composition of the present invention is 5%, 8%, 10%, 13%, 15%, 17% and 20%. The preferred upper limit of the content is 35%, 33%, 30%, 28%, 25%, 23%, 20%, or 35% based on the total amount of the composition of the present invention. %, 18%, 15%, and 13%.

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

^{(Wherein, R N1121} and ^{R N1122} independently represents the same meaning as ^{R N11} and ^{R N12} in the 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 more 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 more preferably an ethoxy group, a propoxy group or a butoxy group.

  The compound represented by 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing _TNI , the content is higher. The effect is high if you set the value to roughly. Further, in order to improve dripping marks and seizure 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-1-12) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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.

^{(Wherein, R N1131} and ^{R N1132} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group or a butyl group. ^RN1132 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 more preferably an ethoxy group, a propoxy group or a butoxy group.

  The compound represented by 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing _TNI , the content is higher. The effect is high if you set the value to roughly. Further, in order to improve dripping marks and seizure 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-1-13) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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.

^{(Wherein, R N1141} and ^{R N1142} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1141 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group or a butyl group. ^RN1142 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 more preferably an ethoxy group, a propoxy group or a butoxy group.

  The compound represented by 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing _TNI , the content is higher. The effect is high if you set the value to roughly. Further, in order to improve dripping marks and seizure 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-1-14) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on the total amount of the composition of the present invention. %, 15%, and 13%.

  The compound represented by formula (N-1-15) is as follows.

^{(Wherein, R N1151} and ^{R N1152} independently represents the same meaning as ^{R N11} and ^{R N12} in the 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 more preferably an ethyl group, a propyl group or a butyl group. ^RN1152 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 more preferably an ethoxy group, a propoxy group or a butoxy group.

  The compound represented by the 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing _TNI , the content is higher. The effect is high if you set the value to roughly. Further, in order to improve dripping marks and seizure 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-1-15) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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.

^{(Wherein, R N1161} and ^{R N1162} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1161 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group or a butyl group. ^RN1162 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 more preferably an ethoxy group, a propoxy group or a butoxy group.

  The compound represented by 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing _TNI , the content is higher. The effect is high if you set the value to roughly. Further, in order to improve dripping marks and seizure 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-1-16) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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.

^{(Wherein, R N1171} and ^{R N1172} independently represents the same meaning as ^{R N11} and ^{R N12} in the 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 more preferably an ethyl group, a propyl group or a butyl group. ^RN1172 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 more preferably an ethoxy group, a propoxy group or a butoxy group.

  The compound represented by 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing _TNI , the content is higher. The effect is high if you set the value to roughly. Further, in order to improve dripping marks and seizure 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-1-17) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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.

^{(Wherein, R N1181} and ^{R N1182} independently represents the same meaning as ^{R N11} and ^{R N12} in the 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, and more preferably a methyl group, an ethyl group, a propyl group, or a butyl group. ^{RN 1182} 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 more preferably an ethoxy group, a propoxy group or a butoxy group.

  The compound represented by 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing _TNI , the content is higher. The effect is high if you set the value to roughly. Further, in order to improve dripping marks and seizure 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-1-18) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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-1-18. 1) to the formula (N-1-18.5). It is preferable that the compound is a compound represented by any one of formulas (N-18.1) to (N-11.3). Compounds represented by 1-1-18.3) are preferred.

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

^{(Wherein, R N1201} and ^{R N1202} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1201 and ^RN1202 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing _TNI , the content is higher. The effect is high if you set the value to roughly. Further, in order to improve dripping marks and seizure 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-1-20) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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.

^{(Wherein, R N1211} and ^{R N1212} independently represents the same meaning as ^{R N11} and ^{R N12} in the 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 more 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing _TNI , the content is higher. The effect is high if you set the value to roughly. Further, in order to improve dripping marks and seizure 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-1-21) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, and 15%. And 17% and 20%. The upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on 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.

^{(Wherein, R N1221} and ^{R N1222} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1221 and ^RN1222 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

When the improvement of Δε is emphasized, it is preferable to set the content higher. When the solubility at low temperature is emphasized, setting the content higher is more effective. When emphasizing _TNI , the content is higher. The effect is high if you set the value to roughly. Further, in order to improve dripping marks and seizure 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-1-21) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, and 13%. And 15%, 17% and 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, or 35%, based on the total amount of the composition of the present invention. %, 15%, 13%, 10%, and 5%.

  Further, the compound represented by the general formula (N-1-22) is a compound selected from the group of compounds represented by the formulas (N-1-22.1) to (N-1-2.12). It is preferably a compound represented by the formulas (N-1-22.1) to (N-1-22.5), and preferably a compound represented by the formulas (N-1-22.1) to (N- The compound represented by 1-22.4) is preferable.

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

  However, the compounds represented by the general formulas (i), (N-1d) and (N-1) are excluded.

  The compounds represented by the formula (L) may be used alone or in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in an appropriate combination according to desired properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in 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, and ten types. More than kind.

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

  The compound represented by the general formula (L) is a so-called non-polar compound in which Δε is around 0. Therefore, the number of polar groups such as halogen atoms in the molecule is preferably 2 or less, more preferably 1 or less. In order to improve the solubility with other liquid crystal compounds, 1 Is preferable, and when attention is paid to viscosity, it is preferable that substitution is not performed.

  The lower limit of the preferable content of the compound represented by the general formula (L) based on 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 preferable upper limit of the content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, and 25%.

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

  When a composition having a high response speed is required while keeping the viscosity of the composition of the present invention low, the lower limit is preferably higher and the upper limit is preferably higher. Furthermore, when the composition of the present invention is required to have a high Tni and a composition having good temperature stability, the lower limit is preferably higher and the upper limit is preferably higher. 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 is lower and the upper limit is lower.

When importance is placed on reliability, R ^L1 and R ^L2 are both preferably an alkyl group, and when importance is placed on reducing the volatility of the compound, it is preferably an alkoxy group. In such a 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 emphasis is placed on compatibility with other liquid crystal molecules.

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

  The alkenyl group is preferably selected from groups represented by any of formulas (R1) to (R5). (The black dots in each formula represent carbon atoms in the ring structure.)

n ^L1 is preferably 0 when importance is placed on the response speed, 2 or 3 is preferred for improving the maximum temperature of the nematic phase, and 1 is preferred for balancing these. Further, 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 in order to improve the response speed. 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 -Diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, more preferably 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 preferably single bonds when importance is placed on the response speed.

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

  The compound represented by Formula (L) is preferably a compound selected from the group of compounds represented by Formulas (L-1) to (L-7).

  The compound represented by 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 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 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

  The preferred lower limit of the content is 1%, 2%, 3%, 5%, 7%, and 10% based on the total amount of the composition of the present invention. The upper limit of the preferable content is 40%, 35%, 33%, 30%, and 25% based on the total amount of the composition of the present invention.

  When a composition having a high response speed is required while keeping the viscosity of the composition of the present invention low, the lower limit is preferably higher and the upper limit is preferably higher. Further, when the composition of the present invention is required to maintain a high Tni and have good temperature stability, the lower limit is preferably medium and the upper limit is preferably medium. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable that the lower limit is lower and the upper limit is lower. To improve the viewing angle characteristics, it is not preferable to increase the upper limit.

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

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

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

  The compound represented by formula (L-1) is preferably a compound selected from the group of compounds represented by 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) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, and 15%. , 17%, 20%, 23%, 25%, 27%, 30%, and 35%. The preferred upper limit of the content is 60%, 55%, 50%, 45%, 42%, 40%, and 38% based on the total amount of the composition of the present invention. %, 35%, 33%, and 30%.

  Further, the compound represented by formula (L-1-2) is a compound selected from the group of compounds represented by formula (L-1-2.1) to formula (L-1-2.4). It is preferable that the compound 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 it particularly improves the response speed of the composition of the present invention. Further, when obtaining Tni higher than the response speed, it is preferable to use the compound represented by the formula (L-1-2.3) or the formula (L-1-2.4). It is not preferable that the content of the compounds represented by the formulas (L-1-2.3) and (L-1-2.4) be 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) relative to the total amount of the composition of the present invention is 10%, 15%, 18%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, 38%, 40%. The preferred upper limit of the content is 60%, 55%, 50%, 45%, 43%, 40%, 38% based on 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) based on the total amount of the composition of the present invention. The values are 10%, 15%, 20%, 25%, 27%, 30%, 35% and 40%. The preferred upper limit of the content is 60%, 55%, 50%, 45%, 43%, 40%, 38% based on the total amount of the composition of the present invention. %, 35%, 32%, 30%, 27%, 25%, and 22%.

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

(In the formula, R ^L13 and R ^L14 each independently represent 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) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, 13% , 15%, 17%, 20%, 23%, 25%, and 30%. The preferred upper limit of the content is 60%, 55%, 50%, 45%, 40%, 37%, 35%, or 60% based on the total amount of the composition of the present invention. %, 33%, 30%, 27%, 25%, 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). The compound is preferably a compound represented by the formula (L-1-3.1), the formula (L-1-3.3) or the formula (L-1-3.4). In particular, the compound represented by the formula (L-1-3.1) is preferable because it particularly improves the response speed of the composition of the present invention. When Tni higher than the response speed is obtained, the expression (L-1-3.3), the expression (L-1-3.4), the expression (L-1-3.11) and the expression (L- It is preferable to use the compound represented by 1-3.12). The sum of the compounds represented by the formulas (L-1-3.3), (L-1-3.4), (L-1-3.11), and (L-1-3.12) Is preferably not more than 20% 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) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18% and 20%. The preferred upper limit of the content is 20%, 17%, 15%, 13%, 10%, 8%, and 7% based on the total amount of the composition of the present invention. % And 6%.

  The compound represented by formula (L-1) is preferably a compound selected from the group of compounds represented by 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) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, 13% , 15%, 17%, and 20%. The preferred upper limit of the content is 25%, 23%, 20%, 17%, 15%, 13%, and 10% based on 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) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, 13% , 15%, 17%, and 20%. The preferred upper limit of the content is 25%, 23%, 20%, 17%, 15%, 13%, and 10% based on the total amount of the composition of the present invention. %.

  Further, the compounds represented by formulas (L-1-4) and (L-1-5) are represented by formula (L-1-5.3) from formula (L-1-4.1). The compound is preferably a compound selected from the group of compounds represented by formula (L-1-4.2) or (L-1-5.2).

  The lower limit of the preferable content of the compound represented by the formula (L-1-4.2) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18% and 20%. The preferred upper limit of the content is 20%, 17%, 15%, 13%, 10%, 8%, and 7% based on 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), two or more compounds selected from the compounds represented by the formulas (L-1-3.11) and (L-1-3.12) are preferable, and the compound represented by the 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), and It is preferable to combine two or more compounds selected from the compounds represented by the 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% , 20%, 23%, 5%, 27%, 30%, 33%, 35%, and the upper limit is 80%, 70%, based on the total amount of the composition of the present invention; 60%, 50%, 45%, 40%, 37%, 35%, 33%, 30%, 28%, 25%, 23% and 20%. When importance is placed on the reliability of the composition, the compounds represented by the formulas (L-1-3.1), (L-1-3.3) and (L-1-3.4)) It is preferable to combine two or more compounds selected from the following. When importance is placed on the response speed of the composition, the compounds are represented by formulas (L-1-1.3) and (L-1-2.2). It is preferable to combine two or more compounds selected from the above compounds.
The compound represented by formula (L-1) is preferably a compound selected from the group of compounds represented by formula (L-1-6).

( ^Where R ^L17 and R ^L18 each independently represent a methyl group or a hydrogen atom.)
The lower limit of the preferable content of the compound represented by the formula (L-1-6) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, and 15%. , 17%, 20%, 23%, 25%, 27%, 30%, and 35%. The preferred upper limit of the content is 60%, 55%, 50%, 45%, 42%, 40%, and 38% based on 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-1-6.3) from the formula (L-1-6.1). Preferably, there is.

  In order to ensure a balance between the response speed and the reliability, the compound represented by the general formula (L-1) is (L-1-1), (L-1-2) and / or (L-1-3) And (L-1-2) and / or (L-1-3) are particularly preferable.

  The compound represented by the 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 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. Alkoxy groups of formulas 1 to 4 are preferred.

    The compound represented by 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

  When importance is placed on solubility at low temperatures, a higher content is more effective. Conversely, when response speed is more important, a lower content is more effective. Further, in order to improve dripping marks and seizure 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) based on the total amount of the composition of the present invention is 1%, 2%, 3%, or 5%. , 7% and 10%. The preferred upper limit of the content is 20%, 15%, 13%, 10%, 8%, 7%, and 6%, based on the total amount of the composition of the present invention. %, 5%, and 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), (L-2.1), a compound selected from the compound group represented by the formula (L-2.3), the formula (L-2.4) and the formula (L-2.6), It is preferably a compound selected from the group of compounds represented by Formula (L-2.3) and Formula (L-2.4).

  The compound represented by 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 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 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

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

  When a high birefringence is to be obtained, the effect is high when the content is set high, and when the Tni is emphasized, the effect is high when the content is set low. Further, in order to improve dripping marks and seizure 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-3.6), (L-3.1), a compound selected from the compound group represented by the formula (L-3.3), the formula (L-3.5) or the formula (L-3.6), The compound represented by the formula (L-3.1) is preferable.

  The compound represented by 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 formula (L).)
^RL41 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and ^RL42 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or a carbon atom. Alkoxy groups of numbers 1 to 4 are preferred. )
The compound represented by 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

  In the composition of the present invention, the content of the compound represented by the general formula (L-4) is determined as follows: solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, drop marks, It is necessary to appropriately adjust 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) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, or 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) relative to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. , 20%, 15%, 10%, and 5%.

  The compound represented by Formula (L-4) is preferably, for example, a compound represented by Formula (L-4.1) to Formula (L-4.3).

  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 compound represented by the formula (L-4.1) -4.2), it contains both the compound represented by the formula (L-4.1) and the compound represented by the formula (L-4.2). May be included, or may include all the compounds represented by the formulas (L-4.1) to (L-4.3). The lower limit of the preferable content of the compound represented by the formula (L-4.1) or (L-4.2) relative to the total amount of the composition of the present invention is 3%, and 5% Yes, 7%, 9%, 11%, 12%, 13%, 18%, 21%, with a preferred upper limit of 45, 40% , 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% .

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

  The compound represented by formula (L-4) is preferably, for example, a compound represented by formula (L-4.4) to formula (L-4.6), and preferably represented by formula (L-4.4). ) Is 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-4.4) is contained, the compound represented by the formula (L -4.5), it contains both the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5). May be.

  The lower limit of the preferred content of the compound represented by the formula (L-4.4) or (L-4.5) relative to the total amount of the composition of the present invention is 3%, and 5% Yes, 7%, 9%, 11%, 12%, 13%, 18%, 21%. Preferred upper limits 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 content of the both compounds is based on the total amount of the composition of the present invention. A preferred lower limit of the content is 15%, 19%, 24%, and 30%, and a preferred upper limit is 45, 40%, 35%, and 30%. Yes, 25%, 23%, 20%, 18%, 15%, 13%.

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

  The compound represented by formula (L-5) is as follows.

(In the formula, R ^L51 and R ^L52 each independently represent the same meaning as R ^L1 and R ^L2 in 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. Alkoxy groups of formulas 1 to 4 are preferred.

  The compound represented by 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, 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 a low temperature, transition temperature, electrical reliability, birefringence, process compatibility, drop marks, It is necessary to appropriately adjust 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) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, or 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) relative to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. , 20%, 15%, 10%, and 5% The compound represented by the formula (L-5) is represented by the formula (L-5.1) or the formula (L-5.2). ) Is preferable, and particularly preferable is a compound represented by the formula (L-5.1).

  The lower limit of the preferable content of these compounds based on 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 represented by the formula (L-5.3) or the formula (L-5.4).

  The lower limit of the preferable content of these compounds based on 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 formulas (L-5.5) to (L-5.7), and particularly preferably the compound represented by the formula (L-5): It is preferably a compound represented by L-5.7).

  The lower limit of the preferable content of these compounds based on 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 formula (L-6) is the following compound.

(Wherein, R ^L61 and R ^L62 each independently represent the same meaning as R ^L1 and R ^L2 in 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 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 can be used in an appropriate combination according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind in one embodiment of the present invention, two kinds, three kinds, four kinds, five kinds or more.

  The lower limit of the preferable content of the compound represented by the formula (L-6) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, or 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) relative to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. , 20%, 15%, 10%, and 5%. When the emphasis is on increasing Δn, the content is preferably increased, and when emphasis is placed on low-temperature precipitation, the content is preferably low.

  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 one to three of these compounds are preferred, and one to four are more preferred. Further, since the wide molecular weight distribution of the selected compound is also effective for solubility, for example, one kind of the compound represented by the formula (L-6.1) or (L-6.2), 6.4) or one kind of the compound represented by (L-6.5), and one kind of the compound represented by the formula (L-6.6) or (L-6.7), one kind of the compound represented by the formula (L It is preferable to select one kind of compound from the compounds represented by -6.8) or (L-6.9) and appropriately combine them. Among them, the formula (L-6.1), the formula (L-6.3), the formula (L-6.4), the formula (L-6.6) and the formula (L-6.9) are used. Preferably, it contains 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). L-6.11).

  The lower limit of the preferable content of these compounds based on 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 formula (L-7) is as follows.

^{(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 Represents the same meaning as A ^L3 , but the hydrogen atoms on A ^L71 and A ^L72 may be each independently substituted by a fluorine atom, and 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} preferably each independently 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 by fluorine atoms, and Z ^L71 is 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 the compounds are combined according to the required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound to be used is, for example, one kind in 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 a low temperature, transition temperature, electrical reliability, birefringence, process suitability, drop marks, It is necessary to appropriately adjust 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) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, or 5%. , 7%, 10%, 14%, 16%, and 20%. The upper limit of the preferable content of the compound represented by the formula (L-7) relative to the total amount of the composition of the present invention is 30%, 25%, 23%, and 20%. , 18%, 15%, 10%, 5%.

  It is preferable to increase the content of the compound represented by the formula (L-7) when an embodiment of Tni having a high composition of the present invention is desired, and when the embodiment of low viscosity is desired. Is preferably reduced.

  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 more preferably the compound represented by the formula (L-7. The compound represented by 2) is preferred.

  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), and more preferably the compound represented by the formula (L-7. The compound represented by 11) is preferable.

  Further, 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). The compound represented by the 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 more preferably a compound represented by 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 more preferably a compound represented by the formula (L-7. 41) and / or a compound represented by the formula (L-7.42).

  Further, 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).

Of the compounds represented by the general formula (i), the general formula (ii), the general formula (N-1d), the general formula (N-1) and the general formula (L) based on the total amount of the composition of the present invention. The lower limit of the total preferred content is 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%. The upper limit of the preferred content is 100%, 99%, 98%, and 95%.

The lower limit of the total preferable content of the compound represented by the general formula (i) in the neutral compound (the compound represented by the general formula (i) and the compound represented by the general formula (L)) is 2 %, 4%, 6%, 8%, 10%, 12%, 14%, and 16%. Preferred upper limits are 30%, 25%, 20%, 18%, 16%, 14%, and 12%.

The lower limit of the preferable total content of the compounds represented by the general formulas (i) and (L) based on the total amount of the composition of the present invention is 5%, 10%, and 15%. , 20% and 25%. The preferable upper limit of the content is 70%, 60%, 55%, 50%, 45%, and 40%.

  When importance is placed on the response speed, it is preferable to include a compound having an alkenyl group. The upper limit of the preferable total content of the compound having an alkenyl group based on the total amount of the composition of the present invention is 95%, 90%, 85%, 80%, and 75%. Yes, 70%, 65%, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25% Yes, 20%, 15%, 10%, 5%.

When importance is placed on reliability, it is preferable to reduce the number of compounds having an alkenyl group. The preferred upper limit of the total content of the compound containing an alkenyl group to the total amount of the composition of the present invention is 30%, 25%, 20%, 15%, 13% , 10%, 8%, 5%, 3%, 2%, 1%, and is preferably substantially free of.

As a basic performance, a liquid crystal composition for a liquid crystal display element is required to be designed with appropriate physical property values. Examples include nematic phase-isotropic liquid phase transition temperature (T _ni ), refractive index anisotropy (Δn), dielectric anisotropy (Δε), rotational viscosity (γ ₁ ), and various elastic constants (spread elasticity). Constant: K ₁₁ , elastic constant of torsion: K ₂₂ , elastic constant of bending: K ₃₃ , and their average value K _ave. ).
Preferably contains a compound represented by the low γ general formula to indicate _{1 (L-1),} general formula (L-1-1), the general formula (L-1-2) and / or General It is preferable to contain a compound represented by the formula (L-1-3).
The compound represented by formula (L-1-1) is a compound selected from the group of compounds represented by formula (L-1-1.1) to formula (L-1-1.3) Is preferable, and a compound represented by the formula (L-1-1.2) or the formula (L-1-1.3) is preferable, and particularly, a compound represented by the formula (L-1-1.3) Preferably, the compound is
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) Is preferable, and a compound represented by the formula (L-1-2.2) to the formula (L-1-2.4) is preferable. In particular, the compound represented by the formula (L-1-2.2) is preferable because it particularly improves the response speed of the composition of the present invention.
The compound represented by the general formula (L-1-3) is a compound selected from the compound group represented by the formula (L-1-3.1) from the formula (L-1-3.1). Is preferable, and a compound represented by the formula (L-1-3.1), the formula (L-1-3.3) or the formula (L-1-3.4) is preferable. In particular, the compound represented by the formula (L-1-3.1) is preferable because it particularly improves the response speed of the composition of the present invention.
In order to design a liquid crystal composition exhibiting an appropriate Δn, it is preferable to contain an appropriate amount of a compound exhibiting a large Δn in addition to the compound represented by the general formula (L-1) exhibiting a small Δn. As the dielectrically neutral compound exhibiting a large Δn, it is preferable to contain a compound represented by formula (L-3) and / or formula (L-5).
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-3.6), -3.1), preferably a compound selected from the group of compounds represented by formula (L-3.3), formula (L-3.5) or formula (L-3.6), It is preferably a compound represented by L-3.1).
The compound represented by the formula (L-5) is preferably a compound represented by the formula (L-5.1) or the formula (L-5.2), and particularly preferably the compound represented by the formula (L-5. The compound represented by 1) is preferred.
In order to design a liquid crystal composition exhibiting an appropriate Δε, it is preferable to contain an appropriate amount of a compound exhibiting a large Δε in addition to the compound represented by the general formula (L-1) exhibiting a small Δn. The compound having a large Δε preferably contains a compound represented by the general formula (N-1d) and / or the general formula (N-1), and includes the general formula (N-1-10) and the general formula (N -1-11), general formula (N-1-1), general formula (N-1-2), general formula (N-1-3), general formula (N-1-4), general formula (N-1-4) -1-5), and a compound represented by the formula (N-1-18) and / or the formula (N-1-22).
The compound represented by the general formula (N-1-10) is a compound selected from the compound group represented by the formula (N-1-10.21) from the formula (N-1-10.1) Are preferred, and compounds represented by the formulas (N-1-10.1) to (N-1-10.5), (N-1-10.20) and (N-1-10.21). It is preferable to use the formula (N-1-10.1), the formula (N-1-10.2), the formula (N-1-10.20), and the formula (N-1-10.21). The compounds represented by the formulas (N-1-10.1) and (N-1-10.2) are preferable, and the compounds represented by the formula (N-1-10.2) Is preferred.
The compound represented by formula (N-1-11) is a compound selected from the group of compounds represented by formula (N-1-11.1) to formula (N-1-11.14) Are preferred, and compounds represented by the formulas (N-1-11.2), (N-1-11.4), (N-1-11.11) and (N-1-11.14) It is preferred that
The compound represented by the general formula (N-1-1) is a compound selected from the group of compounds represented by the formula (N-1-1.13) from the formula (N-1-1.1) Are preferred, and are preferably compounds represented by formulas (N-1-1.1) to (N-1-1.4), and formula (N-1-1.1) and formula (N-1 The compound represented by -1.3) is preferable.
The compound represented by the general formula (N-1-2) is a compound selected from the group of compounds represented by the formula (N-1-2.22) from the formula (N-1-2.1) Are preferable, and the formulas (N-1-2.3) to (N-1-2.7), the formula (N-1-2.10), the formula (N-1-2.11), and the formula (N 2-1.13) and a compound represented by the formula (N-1-2.20), and a compound represented by the formula (N-1-2.2.4) is preferred.
The compound represented by formula (N-1-3) is a compound selected from the group of compounds represented by formula (N-1-3.1) to formula (N-1-3.21) Are preferred, and are preferably compounds represented by the formulas (N-1-3.1) to (N-1-3.7) and the formula (N-1-3.21). -3.1), Formula (N-1-3.2), Formula (N-1-3.3), Formula (N-1-3.4), and Formula (N-1-3.6) The compounds represented are preferred.
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) Are preferred, and compounds represented by formulas (N-1-4.1) to (N-1-4.4) are preferable, and formulas (N-1-4.1) and (N-1 -4.2) and a compound represented by the formula (N-1-4.4).
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) Are preferred, and compounds represented by the formulas (N-1-5.1), (N-1-5.2) and (N-1-5.4) are preferred.
The compound represented by the general formula (N-1-18) is a compound selected from the group of compounds represented by the formula (N-1-18. 1) to the formula (N-1-18.5) Are preferred, and are preferably compounds represented by the formulas (N-1-18.1) to (N-1-11.3), and the formulas (N-1-18.2) and (N-1-18.2) Compounds represented by -18.3) are preferred.
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) Are preferred, and are preferably compounds represented by formulas (N-1-22.1) to (N-1-22.5), and formulas (N-1-22.1) to (N-1- The compound represented by 22.4) is preferred.
When increasing Δn, compounds represented by the general formula (N-1-3), the general formula (N-1-4), the general formula (N-1-5) and the general formula (N-1-18) It preferably contains one or more compounds selected from the group, and particularly preferably contains two or more compounds.
It preferably contains two or more compounds selected from the group of compounds represented by formulas (N-1-3), (N-1-4) and (N-1-18), It preferably contains two or more compounds selected from the group of compounds represented by formula (N-1-3) and formula (N-1-4). It is preferable to contain two or more kinds of the compounds represented.

  Upper limit of the total content of the compound represented by the general formula (N-1d) and the compound represented by the general formula (N-1) having an alkenyl group with respect to the total amount of the composition of the present invention. The values are 20%, 18%, 15%, 13%, 10%, 8%, 5%, 3%, 2%, 1% And it is preferable that it is not substantially contained.

  It is preferable that the composition of the present invention does not contain a compound having a structure in which oxygen atoms are bonded to each other, such as a peracid (—CO—OO—) structure, in the molecule.

  When importance is placed on 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 based on the total mass of the composition. It is more preferably set to 1% or less, and most preferably substantially not contained.

  When importance is placed on the stability due to UV irradiation, the content of the compound substituted with a chlorine atom is preferably 15% or less, more preferably 10% or less, based on the total mass of the composition. %, Preferably 5% or less, more preferably 3% or less, even more preferably substantially not contained.

  It is preferable to increase the content of the compound in which all the ring structures in the molecule are 6-membered rings. % Or more, more preferably 90% or more, and even more preferably 95% or more, and the composition is composed of only a compound having substantially all six-membered ring structures in the molecule. Is most preferred.

  In order to improve the tilt stability of the composition, it is preferable to increase the content of the compound whose side chain is an alkyl group and an alkoxy group, and to increase the content of the compound whose side chain is an alkyl group and an alkoxy group. It is preferably at least 85%, more preferably at least 87%, preferably at least 90%, preferably at least 93%, and preferably at least 95% of the total mass of the composition. Is preferably 98% or more, more preferably substantially 100%. Substantially 100% means 100% excluding polymerizable compounds, stabilizers and any additional impurities.

  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 is determined based on the total mass of the composition. On the other hand, it is preferably at most 10%, more preferably at most 8%, more preferably at most 5%, more preferably at most 3%, even more preferably substantially free of.

  When importance is attached to the improvement of viscosity and the improvement of Tni, it is necessary to reduce the content of a compound having a 2-methylbenzene-1,4-diyl group in which a hydrogen atom may be substituted with a halogen in the molecule. Preferably, the content of the compound having a 2-methylbenzene-1,4-diyl group in a molecule is preferably 10% or less, more preferably 8% or less, based on the total mass of the composition. It is more preferably at most 5%, more preferably at most 3%, even more preferably substantially free of.

  In the present application, “substantially not contained” means that it is not contained except for those that are unintentionally contained.

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

The average elastic constant (K _AVG ) of the liquid crystal composition used in the present invention is preferably from 10 to 25, and the lower limit is preferably 10, preferably 10.5, more preferably 11, and preferably 11.5. , 12 are preferable, 12.3 is preferable, 12.5 is preferable, 12.8 is preferable, 13 is preferable, 13.3 is preferable, 13.5 is preferable, 13.8 is preferable, 14 is preferable, 14 is preferable. 0.3 is preferable, 14.5 is preferable, 14.8 is preferable, 15 is preferable, 15.3 is preferable, 15.5 is preferable, 15.8 is preferable, 16 is preferable, 16.3 is preferable, and 16 is preferable. .5 is preferred, 16.8 is preferred, 17 is preferred, 17.3 is preferred, 17.5 is preferred, 17.8 is preferred, 18 is preferred, and the upper limit is 25 is preferred, 24.5 is preferred, 24 is preferred, 23.5 is preferred, 23 is preferred, 22.8 is preferred, 22.5 is preferred, 22.3 is preferred, 22 is preferred, and 21.8 is preferred. 21.5 is preferred, 21.3 is preferred, 21 is preferred, 20.8 is preferred, 20.5 is preferred, 20.3 is preferred, 20 is preferred, 19.8 is preferred, and 19.5 is preferred. Preferably, 19.3 is preferable, 19 is preferable, 18.8 is preferable, 18.5 is preferable, 18.3 is preferable, 18 is preferable, 17.8 is preferable, 17.5 is preferable, and 17.3 is preferable. Preferably, 17 is preferable. When the reduction of power consumption is important, it is effective to suppress the amount of light of the backlight, and it is preferable to improve the light transmittance of the liquid crystal display element. To this end, the value of K _AVG should be set lower. preferable. When importance is placed on improving the response speed and the contrast, it is preferable to set the value of K _AVG higher.

  The composition of the present invention contains one or two or more types of polymer to prepare a liquid crystal display device such as a vertical alignment type PSA mode, a vertical alignment type PSVA mode, a horizontal electric field type PSA mode or a horizontal electric field type PSVA mode. May be contained.

  The liquid crystal composition of the present invention has the general formula (II)

^{(Wherein, R 201, R 202, R} 203, R 204, R 205, R 206, R 207, R 208, R 209 and ^{R 210} each ^{independently,} P 21 ^{-S 21} -, fluorine atom Represents an alkyl group having 1 to 18 carbon atoms which may be substituted, an alkoxy group having 1 to 18 carbon atoms which may be substituted with a fluorine atom, a fluorine atom or a hydrogen atom,
P ²¹ is each independently a group represented by the formula (R-1) to the formula (R-9)

(Wherein, R ¹¹ , R ¹² , R ¹³ , R ¹⁴ and R ¹⁵ each independently represent an alkyl group having 1 to 5 carbon atoms, a fluorine atom or a hydrogen atom, and m ^r5 , m ^r7 , ^nr5 and ^nr7 each independently represent 0, 1, or 2), and represent a polymerizable group selected from
S ²¹ represents a single bond or an alkylene group having 1 to 15 carbon atoms, one or two or more -CH ₂ in the alkylene group - is, as the oxygen atoms are not directly adjacent, -O -, - OCO- or -COO- may be substituted,
n ²¹ represents 0, 1 or 2;
A ²¹ is
(A) 1,4-cyclohexylene group (this is present in the group one -CH ₂ - or nonadjacent two or more -CH ₂ - may be replaced by -O-.)
(B) 1,4-phenylene group (one -CH = or two or more non-adjacent -CH = present in this group 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 =.)
Wherein the group (a), the group (b) and the group (c) each independently represent an alkyl group having 1 to 12 carbon atoms or an alkyl group having 1 to 12 carbon atoms. alkoxy group, a halogen, a cyano group, a nitro group, or ^P 21 ^{-S 21} - be substituted with good,
At least one or more ^P 21 ^{-S 21} in one molecule of the general formula (II) - have,
L ²¹ represents a single _{bond, -OCH 2 -, - CH 2} O -, - C 2 H 4 -, - OC 2 H 4 O -, - COO -, - OCO -, - CH = CR a -COO -, - ^{CH = CR a -OCO -, -} COO-CR a = CH -, - OCO-CR a = CH -, - (CH 2) z -COO -, - (CH 2) z -OCO -, - OCO- ( CH ₂ ) _z —, —COO— (CH ₂ ) _z —, —CH ＝ CH—, —CF ₂ O—, —OCF ₂ — or —C≡C— (wherein ^Ra is each independently hydrogen. Represents an atom or an alkyl group having 1 to 3 carbon atoms, wherein z independently represents an integer of 1 to 4).
When a plurality of P ²¹ , S ²¹ , and A ²¹ exist, they may be the same or different. )) Are preferred.

In the general formula (II), 1 or 2 or more ^P 21 ^{-S 21} in one molecule of the compound represented by the general formula (II) - preferably having the 4 following ^P 21 ^{-S 21} - The number of P ²¹ —S ²¹ — present in one molecule of the general formula (II) is preferably 1 or more and 4 or less, more preferably 1 or more and 3 or less, and the general formula (II) The number of P ²¹ -S ^21- in the molecule of the compound represented by is particularly preferably 2 or 3.

That is, the compound represented by formula (II), and at least two benzene rings, a structure in which the ring ^{A 21} is linked if necessary, ^P 21 ^{-S 21} in the plurality of benzene rings and ring ^{A 21} - Has at least one, the compound represented by the general formula (II) has an action and an effect as a polymerizable compound.

In the above general formula (II), one or more selected from the group consisting of R ²⁰¹ , R ²⁰² , R ²⁰³ , R ²⁰⁴ , R ²⁰⁵ , R ²⁰⁶ , R ²⁰⁷ , R ²⁰⁸ , R ²⁰⁹ and R ²¹⁰ If it ^{is, R 201, R 202, R} 204, R 207, R 209 or one or two or more either ^{R 210} is ^{P 21 -S} 21 - - but ^P 21 ^{-S 21} is preferably , ^{R 201} and ^{R 210} are ^P 21 ^{-S 21} - is more preferable.

In the general formula (II), R ²⁰¹ and R ²¹⁰ are preferably each independently P ²¹ —S ²¹ —, and in this case, R ²⁰¹ and R ²¹⁰ are the same P ²¹ —S ²¹ — even different ^P 21 ^{-S 21} - may be.

In the general formula ^{(II), R 201, R} 202, R 203, R 204, R 205, R 206, R 207, R 208, R 209 and ^{R 210} each ^{independently,} P 21 ^{-S 21} - Represents an alkyl group having 1 to 18 carbon atoms which may be substituted by a fluorine atom, an alkoxy group having 1 to 18 carbon atoms which may be substituted by a fluorine atom, a fluorine atom or a hydrogen atom, In this case, the alkyl group and the alkoxy group preferably have 1 to 16 carbon atoms, more preferably 1 to 10, more preferably 1 to 8, still more preferably 1 to 6, More preferably, it is 1-4, and especially preferably 1-3. The alkyl group and the alkoxy group may be linear or branched, but are particularly preferably linear.

In the general formula ^{(II), R 202, R} 203, R 204, R 205, R 206, R 207, R 208 and ^{R 209} are each ^{independently,} P 21 ^{-S 21} -, from 1 carbon atom 3 alkyl group, preferably a fluorine atom or a hydrogen atom, P ^{21 -S} 21 ^-, more preferably a fluorine atom or a hydrogen atom, more preferably a fluorine atom or a hydrogen atom.

P ²¹ is preferably the formula (R-1), more preferably an acryl group or a methacryl group, further preferably a methacryl group.

S ²¹ is preferably a single bond or an alkylene group having 1 to 3 carbon atoms, and more preferably a single bond.

In the general formula (II), n ²¹ is preferably 0 or 1.

In the general formula (II), A ²¹ is preferably a 1,4-phenylene group or a naphthalene-2,6-diyl group, and more preferably a 1,4-phenylene group.

In the general formula ^{(II), L 21} represents a single _{bond, -OCH 2 -, - CH 2} O -, - C 2 H 4 -, - COO -, - OCO -, - CH = CH-COO -, - CH = CH-OCO -, - COO-CH = CH -, - OCO-CH = CH -, - C 2 H 4 -COO -, - C 2 H 4 -OCO -, - OCO-C 2 H 4 -, —COO—C ₂ H ₄ —, —CH ＝ CH—, —CF ₂ O—, —OCF ₂ — or —C≡C— is preferred.

The total content of the polymerizable compound represented by the general formula (II) is 0.01 to 5% by mass, and the lower limit of the content is preferably 0.02% by mass, more preferably 0.03% by mass. 0.04% by mass is preferable, 0.05% by mass is preferable, 0.06% by mass is preferable, 0.07% by mass is preferable, 0.08% by mass is preferable, 0.09% by mass is preferable, and 0.09% by mass is preferable. 1 mass% is preferable, 0.15 mass% is preferable, 0.2 mass% is preferable, 0.25 mass% is preferable, 0.3 mass% is preferable, 0.35 mass% is preferable, and 0.4 mass% %, Preferably 0.5% by mass, more preferably 0.55% by mass, and the upper limit of the content is preferably 4.5% by mass, more preferably 4% by mass, preferably 3.5% by mass, and preferably 3% by mass. %, Preferably 2.5% by mass, and 2% by mass. Preferably, 1.5 mass% is preferable, 1 mass% is preferable, 0.95 mass% is preferable, 0.9 mass% is preferable, 0.85 mass% is preferable, 0.8 mass% is preferable, and 0.1 mass% is preferable. 75 mass% is preferable, 0.7 mass% is preferable, 0.65 mass% is preferable, 0.6 mass% is preferable, and 0.55 mass% is preferable.

  The compound represented by the general formula (II) according to the present invention is preferably a polymerizable compound represented by the general formula (IV).

In the general formula (IV), R ⁷ and R ⁸ each independently represent any of the above formulas (R-1) to (R-9), and X ¹ to X ⁸ each independently represent Represents a trifluoromethyl group, a fluorine atom, a hydrogen atom or an alkoxy group having 1 to 5 carbon atoms.

In the general formula (IV), R ⁷ and R ⁸ are preferably each independently a methacryl group or an acryl group.

  The compound represented by the general formula (IV) is more preferably one or more selected from the group consisting of the formulas (IV-11) to (IV-19), and more preferably a compound represented by the formula (IV- 11), Formula (IV-16) and Formula (IV-17) are particularly preferable.

  Specifically, the compound represented by the general formula (II) according to the present invention is preferably, for example, a compound represented by the general formula (XX-21) to the formula (XX-21), and the compound represented by the formula (XX-1) And the formula (XX-7) and the formula (XX-14) to the formula (XX-29) are more preferable.

In the formula (XX-1) to the general formula (XX-29), Sp ^xx represents an alkylene group having 1 to 8 carbon atoms or —O— (CH ₂ ) _s — (wherein, s represents an integer of 1 to 7; And the oxygen atom is bonded to the ring.).

Formula (XX-1) from the formula (XX-29) in the hydrogen atom in the 1,4-phenylene group, _{further, -F, -Cl, -CF 3,} -CH 3 or formula (R-1) May be substituted by any of the formulas (R-15).

  Further, as the compound represented by the general formula (II), for example, a polymerizable compound represented by the formulas (M1) to (M18) is preferable.

  Further, a polymerizable compound represented by the formulas (M19) to (M34) is also preferable.

Hydrogen atoms in the 1,4-phenylene group and naphthalene group in the formula (M34) from equation (M19) is further, -F, _-Cl, -CF 3, may be substituted by -CH _3.

  Further, the compound represented by the general formula (II) is also preferably a polymerizable compound represented by the formulas (M35) to (M65).

In the polymerizable compound-containing liquid crystal composition according to the present invention, the content of the polymerizable compound represented by Formula (M1) to Formula (M65) based on the entire liquid crystal composition is 0.01 to 5% by mass. The lower limit of the content is preferably 0.02% by mass, preferably 0.03% by mass, more preferably 0.04% by mass, preferably 0.05% by mass, preferably 0.06% by mass, and 0.07% by mass. Is preferable, 0.08 mass% is preferable, 0.09 mass% is preferable, 0.1 mass% is preferable, 0.15 mass% is preferable, 0.2 mass% is preferable, and 0.25 mass% is preferable , 0.3% by mass is preferable, 0.35% by mass is preferable, 0.4% by mass is preferable, 0.5% by mass is preferable, 0.55% by mass is preferable, and the upper limit of the content is 4.5% by mass. %, Preferably 4% by mass, and 3% 5% by mass is preferable, 3% by mass is preferable, 2.5% by mass is preferable, 2% by mass is preferable, 1.5% by mass is preferable, 1% by mass is preferable, 0.95% by mass is preferable, and 0.1% by mass is preferable. 9 mass% is preferable, 0.85 mass% is preferable, 0.8 mass% is preferable, 0.75 mass% is preferable, 0.7 mass% is preferable, 0.65 mass% is preferable, and 0.6 mass%. %, Preferably 0.55% by mass.

  When a monomer is added to the composition of the present invention, the polymerization proceeds even in the absence of a polymerization initiator, but the composition may contain a polymerization initiator to promote the polymerization. Examples of the polymerization initiator include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides, and the like.

  The composition of the present invention may further contain a compound represented by the general formula (Q).

(In the formula, R ^Q 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 such that an oxygen atom is not directly adjacent. a, -O -, - CH = CH -, - CO -, - OCO -, - COO -, - C≡C -, - CF 2 O -, - OCF 2 - may be substituted with, in ^{R Q} hydrogen atoms, 4-hydroxy-3,5-di -t- butyl phenyl group may be substituted by, ^{M Q} is trans-1,4-cyclohexylene group, 1,4-phenylene group or a single bond Wherein one or two non-adjacent —CH ₂ — in the trans-1,4-cyclohexylene group may be substituted with —O—.)
R ^Q represents a straight-chain or branched-chain alkyl group having 1 to 22 carbon atoms, and one or more CH ₂ groups in the alkyl group are each —O, so that an oxygen atom is not directly adjacent. -, - CH = CH -, - CO -, - OCO -, - COO -, - C≡C -, - CF 2 O -, - OCF 2 - may be substituted with, but 1 to 10 carbon atoms A linear alkyl group, a linear alkoxy group, a linear alkyl group in which one CH ₂ group is substituted with —OCO— or —COO—, a branched alkyl group, a branched alkoxy group, and one CH ₂ group is —OCO— or branched-chain alkyl group is preferable substituted with -COO-, linear alkyl group having 1 to 20 carbon atoms, one straight chain alkyl group CH ₂ group is substituted -OCO- or -COO- in the branch Chain alkyl group, branched alkoxy group, one CH ₂ group Is more preferably a branched chain alkyl group substituted with -OCO- or -COO-. ^MQ represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a single bond, preferably a trans-1,4-cyclohexylene group or a 1,4-phenylene group.

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

In the formula, R ^Q1 is preferably a linear alkyl group or a branched alkyl group having 1 to 10 carbon atoms, R ^Q2 is preferably a linear alkyl group or a branched alkyl group having 1 to 20 carbon atoms, and R ^Q3 is linear alkyl group having a carbon number of 1 to 8, branched chain alkyl group, preferably a linear alkoxy group or a branched chain alkoxy group, L ^Q is preferably a linear alkylene group or branched alkylene group having 1 to 8 carbon atoms . Among the compounds represented by the general formulas (Qa) to (Qe), the compounds represented by the general formulas (Qa), (Qc) and (Qe) Is more preferred.

  Formulas (Q-11) to (Q-15) are particularly preferred as specific compounds represented by the general formula (Q).

  The composition of the present invention preferably contains one or two kinds of the compound represented by the general formula (Q), more preferably contains 1 to 5 kinds, and the lower limit of the preferable content is 0.0001%, 0.0002%, 0.0005%, 0.001%, 0.002%, 0.005%, 0.01%, 0% 0.015%, 0.02%, 0.05%, 0.75%, 0.01%, and the preferred upper limit of the content is 1%, 1% , 0.9%, 0.8%, 0.7%, 0.6%, 0.5%, 0.4%, 0.3%, 0.25%, 0.2%, 0.19%, 0.18%, 0.17%, 0.16%, 0% 15% der.

  The liquid crystal composition of the present invention may contain at least one compound represented by formula (I-1).

In Formula (I-1), R ^HS each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and is particularly preferably a hydrogen atom. When it is an alkyl group, it preferably has 1 to 8 carbon atoms, preferably 1 to 5 carbon atoms, more preferably 1 to 3 carbon atoms, and preferably 1 carbon atom. More preferred. When a plurality of ^RHSs are present, they may be the same or different.

M ^HS represents an alkyl group having 1 to 15 carbon atoms when n ^HS represents 1, and represents an alkylene group having 1 to 15 carbon atoms when n ^HS represents an integer of 2 to 6, and is present in M ^HS One or more of —CH ₂ — are —O—, —CH ＝ CH—, —C≡C—, —CO—, —OCO—, —COO—, a trans-1,4-cyclohexylene group, , 4-phenylene group or naphthalene-2,6-diyl group, but considering the viscosity given to the liquid crystal composition and the volatility of itself, ^MHS is an alkyl group having 2 to 10 carbon atoms or An alkylene group is preferable, an alkyl group or alkylene group having 2 to 8 carbon atoms is preferable, an alkyl group or alkylene group having 4 to 8 carbon atoms is preferable, and an alkyl group or alkylene group having 6 or 8 carbon atoms is preferable. ^MHS may be linear or branched.

n ^HS represents an integer of 1 to 6, and preferably 2 to 4.

When n ^HS represents 1, the compound represented by the general formula (I-1) is a compound represented by the general formula (I-11), the general formula (I-12) or the general formula (I-13) It is preferred that

(In the formula, R ^H11 each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and M represents an alkylene group having 1 to 13 carbon atoms.)

(In the formula, R ^H12 and R ¹¹² each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.)

(Wherein, R ^H13 and R ¹¹³ each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms.)

When n ^HS represents 2, the compound represented by the general formula (I-1) is preferably a compound represented by the general formula (I-2).

(Wherein, R ^H1 and R ^H2 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and M represents an alkylene group having 1 to 15 carbon atoms. One or more —CH ₂ — is —O—, —CH ＝ CH—, —C≡C—, —CO—, —OCO—, —COO—, a trans-1,4-cyclohexylene group, It may be substituted by a 4-phenylene group or a naphthalene-2,6-diyl group.)
In formula (I-2), ^RH1 and ^RH2 are particularly preferably hydrogen atoms. When it is an alkyl group, it preferably has 1 to 8 carbon atoms, preferably 1 to 5 carbon atoms, more preferably 1 to 3 carbon atoms, and preferably 1 carbon atom. More preferred.
In the general formula (I-2), M represents an alkylene group having 1 to 15 carbon atoms. In consideration of the viscosity given to the liquid crystal composition and the volatility of the liquid crystal composition, M is an alkylene group having 2 to 10 carbon atoms. Preferably, alkylene having 4 to 8 carbon atoms is preferable, and alkylene having 6 or 8 carbon atoms is preferable.
Specifically, compounds represented by the general formulas (I-24), (I-26) and (I-28) can be mentioned. R ^H1 and R ^{H2 in} these formulas are as described above.

More specifically, compounds represented by the general formulas (I-24H), (I-26H) and (I-28H) can be mentioned. (2,2,6,6-tetramethyl-4-piperidyl) sebacate is most suitable.

When n ^HS represents an integer of 3 to 6, the compound represented by the general formula (I-1) is preferably a compound represented by the general formula (I-3). The compound represented by the general formula (I-3) has a high effective amine concentration and thus acts more effectively. Of the compounds represented by the general formula (I-1), those having a small molecular weight are often adsorbed to an alignment film in a liquid crystal display element to cause display unevenness. Since the compound represented by 3) has a large molecular weight, it is possible to prevent display unevenness from being induced.

(Wherein, R ^H3 , R ^H4, and R ^H5 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms. N ^H1 and n ^H2 each independently represent 0 or 1. n ^H3 represents an integer of 1 to 4. When ^nH3 is 2, 3 or 4, and a plurality of ^RH5 are present, they may be the same or different.)
In formula (I-3), ^RH3 , ^RH4, and ^RH5 are particularly preferably hydrogen atoms. When it is an alkyl group, it preferably has 1 to 8 carbon atoms, preferably 1 to 5 carbon atoms, more preferably 1 to 3 carbon atoms, and preferably 1 carbon atom. More preferred.

Specifically, compounds represented by formulas (I-31), (I-32) and (I-33) are preferable. R ^H3 , R ^H4 and R ^{H5 in} these formulas are as described above.

  More specifically, compounds represented by the formulas (I-31H), (I-31C), (I-32H) and (I-33H) are preferred.

  In the liquid crystal composition, the lower limit of the compound represented by the general formula (I-1) is preferably 0.01% or more, more preferably 0.02% or more. 0.03% or more is preferable, 0.05% or more is preferable, 0.07% or more is preferable, 0.1% or more is preferable, and 0.15% or more is preferable. Is preferably contained, more preferably 0.2% or more, preferably 0.25% or more, more preferably 0.3% or more, preferably 0.5% or more, preferably 1%. It is preferable to contain the above. Also, as an upper limit, the content is preferably 5% or less, more preferably 3% or less, preferably 1% or less, preferably 0.5% or less, and preferably 0.45% or less. The content is preferably 0.4% or less, more preferably 0.35% or less, preferably 0.3% or less, more preferably 0.25% or less. 2% or less is preferable, 0.15% or less is preferable, 0.1% or less is preferable, 0.07% or less is preferable, and 0.05% or less is preferable. , Preferably 0.03% or less.

  More specifically, the content is preferably 0.01 to 5% by mass, more preferably 0.01 to 0.3% by mass, and still more preferably 0.02 to 0.3% by mass. Particularly preferred is 0.05 to 0.25% by mass. More specifically, when importance is placed on suppressing precipitation at low temperatures, the content is preferably 0.01 to 0.1% by mass.

  Further, the liquid crystal composition of the present invention may further contain an antioxidant and / or a light stabilizer. More specifically, compounds represented by the following (III-1) to (III-38) are preferable.

(In the formula, n represents an integer of 0 to 20.)
The composition of the present invention includes a compound represented by the general formula (Q), a compound represented by the general formula (I-1), and an antioxidant represented by the general formulas (III-1) to (III-38). And / or a compound selected from light stabilizers. In the liquid crystal composition, the content of these additives is preferably 0.01% or more, more preferably 0.02% or more, and preferably 0.03% or more as a lower limit in the composition. The content is preferably 0.05% or more, more preferably 0.07% or more, preferably 0.1% or more, preferably 0.15% or more. 0.2% or more, preferably 0.25% or more, more preferably 0.3% or more, preferably 0.5% or more, and preferably 1% or more. preferable. Also, as an upper limit, the content is preferably 5% or less, more preferably 3% or less, preferably 1% or less, preferably 0.5% or less, and preferably 0.45% or less. The content is preferably 0.4% or less, more preferably 0.35% or less, preferably 0.3% or less, more preferably 0.25% or less. 2% or less is preferable, 0.15% or less is preferable, 0.1% or less is preferable, 0.07% or less is preferable, and 0.05% or less is preferable. , Preferably 0.03% or less.

More specifically, the content is preferably 0.01 to 5% by mass, more preferably 0.01 to 0.3% by mass, and still more preferably 0.02 to 0.3% by mass. Particularly preferred is 0.05 to 0.25% by mass. More specifically, when importance is placed on suppressing precipitation at low temperatures, the content is preferably 0.01 to 0.1% by mass.
Generally, various parameters calculated from the physical property values of a liquid crystal composition are used as a method for expressing the characteristics of a liquid crystal display element. These include γ ₁ / K ₃₃ or γ ₁ / K _ave , which governs the response speed, K ₁₁ / K ₃₃ , which governs the steepness of the electro-optic effect, and parameters which govern the drive voltage. | K ₃₃ / Δε | or | K _ave / Δε | and K _ave that strongly controls contrast. The liquid crystal composition of the present invention has both high-speed response, low driving voltage, good low-temperature storage stability, high transmittance and high contrast. In this specification, K _ave is defined as the average value of K ₁₁ and K ₃₃ .
Therefore, γ ₁ / K _33, which is a parameter that governs the response speed of the vertically aligned liquid crystal display device, is 10. 0 mPa · s · pN ⁻¹ or less is preferable, 9.8 mPa · s · pN ⁻¹ or less is preferable, 9.5 mPa · s · pN ⁻¹ or less is preferable, and 9.2 mPa · s · pN ⁻¹ or less is preferable, preferably 9.0mPa · s · ^{pN -1} or less, preferably 8.8mPa · s · ^{pN -1} or less, preferably 8.6mPa · s · ^{pN -1} or less, 8.4mPa · s · ^{pN -1} or less It is preferably 8.2 mPa · s · pN ⁻¹ or less, more preferably 8.0 mPa · s · pN ⁻¹ or less, preferably 7.8 mPa · s · pN ⁻¹ or less, and 7.6 mPa · s · pN ^−1. Or less, preferably 7.4 mPa · s · pN ⁻¹ or less, more preferably 7.2 mPa · s · pN ⁻¹ or less, preferably 7.0 mPa · s · pN ⁻¹ or less, and 6.8 mPa · s · pN. ^-1 or less Is preferred, and 6.6 mPa · s · pN ⁻¹ or less is particularly preferred.
Γ ₁ / K _ave, which is a parameter governing the response speed of the horizontally aligned liquid crystal display element, is 10. 0 mPa · s · pN ⁻¹ or less is preferable, 9.8 mPa · s · pN ⁻¹ or less is preferable, 9.5 mPa · s · pN ⁻¹ or less is preferable, and 9.2 mPa · s · pN ⁻¹ or less is preferable, preferably 9.0mPa · s · ^{pN -1} or less, preferably 8.8mPa · s · ^{pN -1} or less, preferably 8.6mPa · s · ^{pN -1} or less, 8.4mPa · s · ^{pN -1} or less It is preferably 8.2 mPa · s · pN ⁻¹ or less, more preferably 8.0 mPa · s · pN ⁻¹ or less, preferably 7.8 mPa · s · pN ⁻¹ or less, and 7.6 mPa · s · pN ^−1. Or less, preferably 7.4 mPa · s · pN ⁻¹ or less, more preferably 7.2 mPa · s · pN ⁻¹ or less, preferably 7.0 mPa · s · pN ⁻¹ or less, and 6.8 mPa · s · pN. ^-1 or less Is preferred, and 6.6 mPa · s · pN ⁻¹ or less is particularly preferred.
K ₁₁ / K _33, which is a parameter that governs the steepness of the electro-optical effect in a vertically aligned liquid crystal display element, is preferably 1.30 or less, preferably 1.25 or less, preferably 1.20 or less, and more preferably 1.18 or less. Preferably, 1.15 or less is preferable, 1.12 or less is preferable, 1.10 or less is preferable, 1.08 or less is preferable, 1.06 or less is preferable, 1.04 or less is preferable, and 1.02 or less is preferable. , 1.00 or less is particularly preferred.
| K ₃₃ / Δε |, which is a parameter that governs the drive voltage of a vertically aligned liquid crystal display element, is preferably 6.0 pN or less, preferably 5.9 pN or less, preferably 5.8 pN or less, and more preferably 5.7 pN or less. It is preferably at most 1.6 pN, preferably at most 5.5 pN, more preferably at most 5.4 pN, preferably at most 5.3 pN, preferably at most 5.2 pN, preferably at most 5.1 pN, preferably at most 5.0 pN. 9 pN or less is preferable, and 4.8 pN or less is particularly preferable.
| K _ave / Δε |, which is a parameter governing the drive voltage of the horizontal alignment liquid crystal display element, is preferably 6.0 pN or less, preferably 5.9 pN or less, preferably 5.8 pN or less, and more preferably 5.7 pN or less. It is preferably at most 1.6 pN, preferably at most 5.5 pN, more preferably at most 5.4 pN, preferably at most 5.3 pN, preferably at most 5.2 pN, preferably at most 5.1 pN, preferably at most 5.0 pN. 9 pN or less is preferable, and 4.8 pN or less is particularly preferable.
K _ave which is a parameter governing the contrast of the liquid crystal display element is preferably 10.0 pN or more,
10.5 pN or more is preferable, 11.0 pN or more is preferable, 11.5 pN or more is preferable, 12.0 pN or more is preferable, 12.5 pN or more is preferable, 13.0 pN or more is preferable, 13.0 pN or more is preferable, and 14 0.0pN or more is preferable, 14.2pN or more is preferable, 14.4pN or more is preferable, 14.6pN or more is preferable, 14.8pN or more is preferable, 15.0pN or more is preferable, 15.2pN or more is preferable, and 15. 4 pN or more is preferable, 15.6 pN or more is preferable, 15.8 pN or more is preferable, 16.0 pN or more is preferable, 16.2 pN or more is preferable, 16.4 pN or more is preferable, 16.6 pN or more is preferable, and 16.8 pN is preferable. Or more, preferably 17.0 pN or more, more preferably 17.2 pN or more. Ku is preferably at least 17.4PN is preferably at least 17.6PN is preferably at least 17.8PN, more 18.0pN is particularly preferred.
In particular, in the case of a horizontal alignment liquid crystal display element which is disadvantageous for contrast, the average is preferably 16.0 pN or more, more preferably 16.2 pN or more, preferably 16.4 pN or more, preferably 16.6 pN or more, and more preferably 16.8 pN or more. 0 pN or more is preferable, 17.2 pN or more is preferable, 17.4 pN or more is preferable, 17.6 pN or more is preferable, 17.8 pN or more is preferable, and 18.0 pN or more is particularly preferable.

  The composition containing the polymerizable compound of the present invention is provided with a liquid crystal alignment ability by polymerizing the polymerizable compound contained therein by irradiation with ultraviolet light, and controls the amount of transmitted light using the birefringence of the composition. Used in liquid crystal display devices.

  The liquid crystal display device using the composition of the present invention is useful for achieving both high-speed response and suppression of display defects, and is particularly useful for a liquid crystal display device for driving an active matrix, and includes a VA mode, a PSVA mode, and a PSA mode. Mode, IPS mode, FFS mode or ECB mode.

  In addition, in the process of manufacturing a liquid crystal display element by the ODF method, it is necessary to drop an optimal amount of liquid crystal to be injected in accordance with the size of the liquid crystal display element. The liquid crystal display element has a low influence on a sudden pressure change or impact in the device and can stably drop the liquid crystal for a long time, so that the yield of the liquid crystal display element can be kept high. In particular, small liquid crystal display elements frequently used in smartphones that have become popular recently have difficulty in controlling the deviation from the optimum value within a certain range due to a small amount of liquid crystal injection. By using the object, a stable discharge amount of the liquid crystal material can be realized even in a small liquid crystal display element.

  Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples. Further, “%” in the compositions of the following Examples and Comparative Examples means “% by mass”.

  The characteristics measured in the examples are as follows.

T _ni : Nematic phase-isotropic liquid phase transition temperature (° C.)
Δn: refractive index anisotropy at 293K Δε: dielectric anisotropy at 293K γ ₁ : rotational viscosity at 293K (mPa · s)
K ₁₁ : Elastic constant of spread at 293 K (pN)
K ₂₂ : elastic constant of torsion at 293K (pN)
K _33: elastic constant of bend in 293 K (pN)
K _ave. : Average elastic constant (pN) at 293K
In the examples, the following abbreviations are used for describing compounds.
(Ring structure)

(Side chain structure)

(However, n in the table is a natural number.)
(Connected structure)

(However, n in the table is a natural number.)
(Judgment criteria)
When evaluating the characteristics as a horizontally aligned liquid crystal display device, apply the prepared liquid crystal composition to a cell with a comb-toothed ITO that has been coated with a polyimide alignment film that induces homogeneous alignment and rubbed, using the vacuum injection method. Thus, an in-plane switching (IPS) liquid crystal display element was obtained. The electro-optical characteristics of the obtained IPS liquid crystal display devices were measured, and the driving voltage, response speed, transmittance, contrast, and the like were evaluated. The results were determined in three stages: “○: no problem level”, “△: slightly insufficient and unacceptable level”, and “×: unacceptable level”. When evaluating a liquid crystal composition with Δn of less than 0.105, use a cell with a cell gap of 2.8 μm. When evaluating a liquid crystal composition with Δn of 0.105 or more, use a cell with a cell gap of 2.6 μm. did.

  When the characteristics as a vertical alignment liquid crystal display element are evaluated, the prepared liquid crystal composition is injected into a cell with ITO coated with a polyimide alignment film for inducing homeotropic alignment by a vacuum injection method to obtain a vertical alignment (VA). ) A liquid crystal display element was obtained. The electro-optical characteristics of the obtained VA liquid crystal display device were measured, and the driving voltage, response speed, transmittance, contrast, and the like were evaluated. The results were determined in three stages: “○: no problem level”, “△: slightly insufficient and unacceptable level”, and “×: unacceptable level”. When evaluating a liquid crystal composition having Δn of less than 0.105, use a cell having a cell gap of 3.3 μm. When evaluating a liquid crystal composition having Δn of 0.105 or more, use a cell having a cell gap of 3.0 μm. did.

When evaluating a liquid crystal display device that controls the alignment of liquid crystal molecules by adding a polymerizable compound to a liquid crystal composition and performing photopolymerization, as represented by polymer stabilized vertical alignment (PSVA), the injected liquid crystal display device On the other hand, in the case of a VA liquid crystal display element, the liquid crystal display element is exposed to a UV lamp having an intensity of about 100 mW / cm ⁻² (365 nm) for about 10 J while applying a rectangular wave of 10 V and 100 Hz. The polymer was exposed to about 100 J in a state of cutting, to obtain a polymer-stabilized vertical alignment (PSVA) liquid crystal display device. In the case of an IPS or FFS liquid crystal display device, a polymer-stabilized horizontal alignment (PS-IPS or PS-FFS) liquid crystal display device was obtained by exposing about 100 J without applying a voltage. The electro-optical characteristics of the obtained liquid crystal display devices were measured, and the driving voltage, response speed, transmittance, contrast, and the like were evaluated. The results were determined in three stages: “○: no problem level”, “△: slightly insufficient and unacceptable level”, and “×: unacceptable level”.
(Comparative Example 1 and Example 1)
Liquid crystal compositions of LC-A as a comparative example and LC-1 as an example were prepared, and the physical properties thereof were measured. The structure of the liquid crystal composition and the results of the physical properties thereof are shown below.

LC-1 (Example 1) and LC-A (Comparative Example 1) are parameters γ ₁ / K _ave. Is a sufficiently small parameter that governs the drive voltage | K _ave. / Δε | was found to be a sufficiently low liquid crystal composition. On the other hand, it was found that Δn of LC-A was significantly smaller than that of LC-1.

  Next, a horizontal alignment liquid crystal display element and a vertical alignment liquid crystal display element were obtained using these liquid crystal compositions, and it was confirmed that each of these liquid crystal display elements exhibited high-speed response and low driving voltage. However, the display device made using LC-A had a lower transmittance than the liquid crystal display device made using LC-1, and a remarkable decrease in contrast was observed.

From the above, it was found that the liquid crystal composition of the present invention was an excellent liquid crystal composition capable of satisfying all of high-speed response, low driving voltage, high transmittance, and high contrast.
(Comparative Example 2 and Example 2)
Liquid crystal compositions of LC-B as a comparative example and LC-2 as an example were prepared, and physical properties thereof were measured. The structure of the liquid crystal composition and the results of the physical properties thereof are shown below.

LC-2 (Example 2) and LC-B (Comparative Example 2) are parameters that govern the drive voltage | K _ave. / Δε | was found to be a sufficiently low liquid crystal composition. On the other hand, LC-B is a parameter that governs drive voltage, response speed, and contrast as compared with LC-2, and _Kave. Is small, and γ ₁ / K _ave. Is a parameter that governs the response speed _. Was found to be larger.

  Next, when a horizontal alignment liquid crystal display element and a vertical alignment liquid crystal display element were obtained using these liquid crystal compositions, it was confirmed that each of these liquid crystal display elements exhibited a low driving voltage. However, it has been found that the liquid crystal display device formed using LC-B has a lower response speed and lower contrast than the liquid crystal display device formed using LC-2.

From the above, it was found that the liquid crystal composition of the present invention was an excellent liquid crystal composition capable of satisfying all of high-speed response, low driving voltage, high transmittance, and high contrast.
(Examples 3, 4, and 5)
As examples, LC-3, LC-4 and LC-5 liquid crystal compositions were prepared, and the physical properties thereof were measured. The structure of the liquid crystal composition and the results of the physical properties thereof are shown below.

From the above, it has been found that the liquid crystal composition of the present invention is an excellent liquid crystal composition capable of satisfying all of high-speed response, low driving voltage, high transmittance, and high contrast in a liquid crystal display device.
(Examples 6, 7, and 8)
As examples, LC-6, LC-7 and LC-8 liquid crystal compositions were prepared, and the physical properties thereof were measured. The structure of the liquid crystal composition and the results of the physical properties thereof are shown below.

From the above, it has been found that the liquid crystal composition of the present invention is an excellent liquid crystal composition capable of satisfying all of high-speed response, low driving voltage, high transmittance, and high contrast in a liquid crystal display device.
(Examples 9 to 40)
To the prepared liquid crystal compositions LC-1 to LC8, polymerizable compounds represented by XX-2, XX-5, XX-15 and M65 were added as polymerizable compounds, and the polymerizable compound-containing liquid crystal composition MLC was added. -1 to MLC-32 (Examples 9 to 40) were prepared.

The structure of the obtained polymerizable compound-containing liquid crystal composition is shown below.

  A horizontal alignment liquid crystal display element and a vertical alignment liquid crystal display element were obtained using these polymerizable compound-containing liquid crystal compositions, and then subjected to UV treatment to obtain a polymer stabilized liquid crystal display element. It was confirmed that all of these polymer-stabilized liquid crystal display devices exhibited the same or better characteristics as the liquid crystal display devices prepared in Examples 1 to 8.

  From the above, it has been found that the liquid crystal composition of the present invention is an excellent liquid crystal composition that can achieve all of high-speed response, low driving voltage, high transmittance, and high contrast even in a polymer liquid crystal display device.

Claims (11)

Equation (i)

Containing a compound represented by
Further, the general formula (N-1)

^(Wherein, independently ^{R N11} and ^{R N12} are each represents a linear alkyl group having 1 to 8 carbon atoms, one in the alkyl group or non-adjacent two or more -CH ₂ - is Each independently may be substituted by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-,
n ^N11 and n ^N12 each independently represent 0, 1, 2 or 3, while n ^N11 + n ^N12 represents 1, 2 or 3;
A ^N11 and A ^N12 are each independently
(A) 1,4-cyclohexylene group, (this is present in the group one -CH ₂ - - or nonadjacent two or more -CH ₂ may be replaced by -O-.)
(B) 1,4-phenylene group (one -CH = or two or more non-adjacent -CH = present in this group 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 =.)
It represents a group selected from the group consisting of the above group (a), group (b) and group (c) is one of -CH 2 present in the alkyl group (in this group independently _- or adjacent Two or more non-CH ₂ — may be replaced by —O—), an alkenyl group (one —CH ₂ — or two or more non-adjacent —CH present in this group) _2- may be replaced by -O-), a cyano group, a fluorine atom or a chlorine atom,
Z ^N11 and ^{Z N12} 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 -, - represents CF = CF- or -C≡C-,
When a plurality of A ^N11 and / or A ^N12 exist, they may be the same or different. When a plurality of Z ^N11 and / or Z ^N12 exist, they may be the same or different. However, the compound represented by the general formula (N-1) excludes the compound represented by the general formula (N-1d) described later. )
Containing one or more compounds represented by
As the compound represented by the general formula (N-1), a compound represented by the general formula (N-1-3)

(Wherein, ^{R N131} will display the same meaning as R ^N11 in one general formula ^{(N-1), R N132} is to display the alkoxy group having 1 to 4 carbon atoms.)
Containing a compound represented by
Further, one or more compounds selected from the group of compounds represented by formula (L-1-1) and / or formula (L-1-2) are contained ,
A liquid crystal composition having a negative dielectric anisotropy, wherein the average value K _ave of K ₁₁ and K ₃₃ is 14.0 pN or more .

(Wherein R ^L12 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 —CH ＝ CH—, — It may be substituted by C≡C-, -O-, -CO-, -COO- or -OCO-.)

(Wherein R ^L12 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 —CH ＝ CH—, — It may be substituted by C≡C-, -O-, -CO-, -COO- or -OCO-.)

( ^Wherein , R ^Nd11 and R ^Nd12 each independently represent 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 May be substituted by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-,
n ^Nd11 represents 1, 2 or 3. ) As the compound represented by the general formula (N-1), a compound represented by the general formula (N-1c)

^{(Wherein, R N11} and ^{R N12} are as defined ^{R N11} and ^{R N12} in the general formula ^{(N-1), n Nc11} represents 0.)
The liquid crystal composition according to claim 1, further comprising a compound represented by the following formula: As the compound represented by the general formula (N-1), a compound represented by the general formula (N-1e)

^{(Wherein, R N11} and ^{R N12} are as defined ^{R N11} and ^{R N12} in the general formula ^{(N-1), n Ne11} is 1 or ^{2, A NE11} xylene trans-1,4-cyclohexylene represents a group or 1,4-phenylene ^{group, Z Ne 11} is at least one represents a single bond or ethylene represents ethylene.)
The liquid crystal composition according to claim 1, further comprising a compound represented by the formula:   The liquid crystal composition according to any one of claims 1 to 3, further comprising a compound represented by formula (N-1d). As a compound represented by the general formula (N-1), a compound represented by the general formula (N-1g)

^{(Wherein, R N11} and ^{R N12} are as defined ^{R N11} and ^{R N12} in the general formula ^{(N-1), n Ng11} is 1 or ^{2, A NG11} xylene trans-1,4-cyclohexylene A 1,4-cyclohexenylene group or a 1,4-phenylene group, at least one of which represents a 1,4-cyclohexenylene group.)
The liquid crystal composition according to any one of claims 1 to 4, further comprising a compound represented by the following formula: Further, the general formula (L)

(Wherein, R ^L1 and R ^L2 each independently represent 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 May be substituted by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-,
A ^L1 , A ^L2 and A ^L3 are each independently
(A) 1,4-cyclohexylene group, (this is present in the group one -CH ₂ - - or nonadjacent two or more -CH ₂ may be replaced by -O-.)
(B) 1,4-phenylene group (one -CH = or two or more non-adjacent -CH = present in this group 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 =.)
It represents a group selected from the group consisting of the above group (a), group (b) and group (c) is one of -CH 2 present in the alkyl group (in this group independently _- or adjacent Two or more non-CH ₂ — may be replaced by —O—), an alkenyl group (one —CH ₂ — or two or more non-adjacent —CH present in this group) _2- may be replaced by -O-), a cyano group, a fluorine atom or a chlorine atom,
Z ^L1 and Z ^L2 each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —OCF. _{2 -, - CF 2 O -} , - CH = N-N = CH -, - CH = CH -, - represents CF = CF- or -C≡C-,
n ^L1 represents 0, 1, 2 or 3,
When there are a plurality of A ^{L2 s} , they may be the same or different, and when there are a plurality of Z ^L2 , they may be the same or different. The compound represented by the general formula (L-1-1) and the compound represented by the general formula (L-1-2) are excluded. )
The liquid crystal composition according to any one of claims 1 to 5, wherein the liquid crystal composition contains one or more compounds represented by formula (1).   The liquid crystal composition according to claim 1, further comprising a polymerizable compound. The polymerizable compound has the general formula (II)

^{(Wherein, R 201, R 202, R} 203, R 204, R 205, R 206, R 207, R 208, R 209 and ^{R 210} each ^{independently,} P 21 ^{-S 21} -, fluorine atom Represents an alkyl group having 1 to 18 carbon atoms which may be substituted, an alkoxy group having 1 to 18 carbon atoms which may be substituted with a fluorine atom, a fluorine atom or a hydrogen atom,
P ²¹ is each independently a group represented by the formula (R-1) to the formula (R-9)

(Wherein, R ¹¹ , R ¹² , R ¹³ , R ¹⁴ and R ¹⁵ each independently represent an alkyl group having 1 to 5 carbon atoms, a fluorine atom or a hydrogen atom, and m ^r5 , m ^r7 , ^nr5 and ^nr7 each independently represent 0, 1, or 2), and represent a polymerizable group selected from
S ²¹ represents a single bond or an alkylene group having 1 to 15 carbon atoms, one or two or more -CH ₂ in the alkylene group - is, as the oxygen atoms are not directly adjacent, -O -, - OCO- or -COO- may be substituted,
n ²¹ represents 0, 1 or 2;
A ²¹ is
(A) 1,4-cyclohexylene group (this is present in the group one -CH ₂ - or nonadjacent two or more -CH ₂ - may be replaced by -O-.)
(B) 1,4-phenylene group (one -CH = or two or more non-adjacent -CH = present in this group 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 =.)
Wherein the group (a), the group (b) and the group (c) each independently represent an alkyl group having 1 to 12 carbon atoms or an alkyl group having 1 to 12 carbon atoms. alkoxy group, a halogen, a cyano group, a nitro group, or ^P 21 ^{-S 21} - be substituted with good,
At least one or more ^P 21 ^{-S 21} in one molecule of the general formula (II) - have,
L ²¹ represents a single _{bond, -OCH 2 -, - CH 2} O -, - C 2 H 4 -, - OC 2 H 4 O -, - COO -, - OCO -, - CH = CR a -COO -, - ^{CH = CR a -OCO -, -} COO-CR a = CH -, - OCO-CR a = CH -, - (CH 2) z -COO -, - (CH 2) z -OCO -, - OCO- ( CH ₂ ) _z —, —COO— (CH ₂ ) _z —, —CH ＝ CH—, —CF ₂ O—, —OCF ₂ —, or —C≡C— (wherein ^Ra is each independently hydrogen. Represents an atom or an alkyl group having 1 to 3 carbon atoms, and in the above formula, z independently represents an integer of 1 to 4.)
The liquid crystal composition according to claim 7, which is represented by the following formula:   A liquid crystal display device using the liquid crystal composition according to claim 1.   A vertical alignment type liquid crystal display device using the liquid crystal composition according to claim 1.   A horizontal alignment type liquid crystal display device using the liquid crystal composition according to claim 1.