JP6403038B1 - Liquid crystal display element - Google Patents

Abstract

The problem to be solved by the present invention is to provide an n-type liquid crystal composition having improved viewing angle characteristics while satisfying various characteristics required for a so-called n-type liquid crystal composition having a negative dielectric anisotropy (Δε). In addition, it is to provide a liquid crystal display element using the same.
The total content of the compound represented by the general formula (i) with respect to the total amount of the composition is 3% or more, and the total content of the compound represented by the general formula (ii) with respect to the total amount of the composition is 3% or more. Yes, the total content of the compound represented by general formula (i) relative to the total amount of the compound represented by general formula (i), the compound represented by general formula (ii) and the compound represented by general formula (L) A liquid crystal composition having a negative dielectric anisotropy in an amount of 20% or more is provided, and a liquid crystal display device using these is also provided.

Description

  The present invention relates to a so-called n-type liquid crystal composition having a negative dielectric anisotropy (Δε) and a liquid crystal display device using the same.

  Liquid crystal display devices using a composition having a negative value of Δε are widely used for liquid crystal TVs and the like, and in recent years, extremely high characteristics are required for the compositions used for these applications. Specifically, high brightness, high viewing angle characteristics, and high resolution are required while supporting high-speed response, low power consumption, long-term and short-term reliability, and a wide liquid crystal phase temperature range that support video display. ing. For this reason, the liquid crystal composition (Patent Documents 1, 2, and 3) that has been used in the past is also required to be optimized for the liquid crystal compound and the content of the liquid crystal composition according to the required characteristics. It has become. In addition, display defects such as image sticking hardly occur, drop marks at the time of manufacture hardly occur, and there is a demand for stable dischargeability of the composition in the ODF process, and these must be dealt with.

WO2016 / 017569 Japanese Patent Laid-Open No. 2006-040368 JP 2006-033132 A

  The problem to be solved by the present invention is to provide an n-type liquid crystal composition having improved viewing angle characteristics while satisfying various characteristics required for a so-called n-type liquid crystal composition having a negative dielectric anisotropy (Δε). In addition, it is to provide a liquid crystal display element using the same.

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

The present invention relates to one or more compounds selected from compounds represented by general formula (i), one or more compounds selected from compounds represented by general formula (ii), and general formulas One or more compounds selected from the compounds represented by (N-1d), one or more compounds selected from the compounds represented by formula (N-1), and the general formula (L ) Containing one or more compounds selected from the compounds represented by:
The total content of the compound represented by the general formula (i) with respect to the total amount of the composition is 3% or more, and the total content of the compound represented by the general formula (ii) with respect to the total amount of the composition is 3% or more. Yes, the total content of the compound represented by general formula (i) relative to the total amount of the compound represented by general formula (i), the compound represented by general formula (ii) and the compound represented by general formula (L) A liquid crystal composition having a negative dielectric anisotropy in an amount of 20% or more is provided, and a liquid crystal display device using the same is also provided.

(In the formula, R ⁱ¹ and R ⁱⁱ¹ each independently represent an alkyl group having 1 to 5 carbon atoms, R ⁱ² and R ⁱⁱ² each independently represent a methyl group or a methoxy group,
R ^Nd11 , R ^Nd12 , R ^N11 , R ^N12 , R ^L1, and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more adjacent ones in the alkyl group Each —CH ₂ — may be independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—;
n ^Nd11 represents 1, 2 or 3; n ^N11 and n ^N12 represent 0, 1, 2 or 3; n ^N11 + n ^N12 represents 1, 2 or 3; n ^L1 represents 0, 1, 2 or 3 3
A ^N11 , A ^N12 , A ^L1 , A ^L2 and A ^L3 are each independently (a) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or _two not adjacent to each other). more -CH ₂ -. may be replaced by -O-) and (b) 1,4-phenylene group (the one present in the group -CH = or adjacent to two or more non -CH = may be replaced with -N =.
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be replaced by —N═. )
The group (a), the group (b) and the group (c) may be each independently substituted with a cyano group, a fluorine atom or a chlorine atom,
Z ^N11 , Z ^N12 , Z ^L1 and Z ^L2 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, — OCO—, —OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—
When a plurality of A ^N11 , A ^N12 , A ^L1 , A ^L2 and / or A ^L3 are present, they may be the same or different, and Z ^N11 , Z ^N12 , Z ^L1 and / or Z ^L2 may be When two or more are present, they may be the same or different, but the compound represented by the general formula (N-1) is a general formula except for the compound represented by the general formula (N-1d). The compound represented by (L) excludes compounds represented by general formula (i), general formula (ii), general formula (N-1d), and general formula (N-1). )

  The so-called n-type liquid crystal composition having a negative Δε according to the present invention satisfies various characteristics required for the n-type liquid crystal composition, has improved viewing angle characteristics, and has excellent display characteristics. The liquid crystal display element of the present invention is useful for display elements such as liquid crystal TVs and monitors.

  As described above, the present invention relates to a specific n-type liquid crystal composition and a liquid crystal display device using the same. Hereinafter, first, embodiments of the liquid crystal composition in the present invention will be described.

  The composition of the present invention comprises one or more compounds selected from compounds represented by general formula (i), one or more compounds selected from compounds represented by general formula (ii) , One or more compounds selected from compounds represented by general formula (N-1d), one or more compounds selected from compounds represented by general formula (N-1), 1 type, or 2 or more types of compounds chosen from the compound represented by Formula (L) are contained.

  The compound represented by the general formula (i) corresponds to a dielectrically neutral compound (Δε is −2 to 2).

  As for the compound represented by general formula (i), only 1 type may be used, but 2 or more types may be used. From the viewpoint of easy procurement, it is preferable to use only one kind.

In general formula (i), R ⁱ¹ is preferably an ethyl group, a propyl group, or a pentyl group, preferably an ethyl group or a propyl group, and more preferably a propyl group. R ⁱ² is preferably a methoxy group.

  The lower limit of the preferable content of the compound represented by the formula (i) with respect to the total amount of the composition of the present invention is 3%, 5%, 7%, 9%, 10% %, 12%, and 13%. The upper limit of the preferable content is 30%, 27%, 25%, 23%, 20%, 19%, 18%, and 17%.

  As the compound represented by the general formula (i), compounds represented by the formulas (i-1) to (i-4) are preferable, and a compound represented by the formula (i-4) is preferable.

  The lower limit of the preferable content of the compound represented by the formula (i-4) with respect to the total amount of the composition of the present invention is 3%, 5%, 7%, 9%. 10%, 12%, and 13%. The upper limit of the preferable content is 30%, 27%, 25%, 23%, 20%, 19%, 18%, and 17%.

  The compound represented by the general formula (ii) corresponds to a dielectrically neutral compound (Δε is −2 to 2).

  As for the compound represented by general formula (ii), only 1 type may be used, but 2 or more types may be used. From the viewpoint of easy procurement, it is preferable to use only one kind.

In general formula (ii), ^Rii1 is preferably an ethyl group, a propyl group or a pentyl group, preferably an ethyl group or a propyl group, and more preferably a propyl group. R ⁱⁱ² is preferably a methyl group.

  The lower limit of the preferable content of the compound represented by the formula (ii) with respect to the total amount of the composition of the present invention is 2%, 3%, 5%, 7%, 9 %. The upper limit of the preferable content is 25%, 23%, 20%, 18%, 16%, and 14%.

  As the compound represented by the general formula (ii), compounds represented by the formulas (ii-1) to (ii-4) are preferable, and a compound represented by the formula (ii-3) is preferable.

  The lower limit of the preferable content of the compound represented by the formula (ii-3) with respect to the total amount of the composition of the present invention is 3%, 5%, 7%, 9% 10%, 12%, and 13%. The upper limit of the preferable content is 30%, 27%, 25%, 23%, 20%, 19%, 18%, and 17%.

  The compound represented by the general formula (i) and the compound represented by the general formula (ii) preferably use a large amount of the compound represented by the general formula (i), and are represented by the general formula (i). It is preferable to increase the compound content by 2%.

  The preferred lower limit of the total content of the compound represented by the general formula (i) and the compound represented by the general formula (ii) with respect to the total amount of the composition is 15%, 18%, and 20%. 22% and 24%. The upper limit of the preferable content is 40%, 37%, 35%, 33%, 30%, and 28%.

  The preferable lower limit of the total content of the compound represented by the general formula (i-4) and the compound represented by the general formula (ii-3) with respect to the total amount of the composition is 15% and 18%, 20%, 22% and 24%. The upper limit of the preferable content is 40%, 37%, 35%, 33%, 30%, and 28%.

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

  As for the compound represented by general formula (N-1d), only 1 type may be used, but 2 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, 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 a carbon atom 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. A 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 oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

  Particularly preferred are an ethyl group and a propyl group.

R ^Nd12 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 preferred, an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms is more preferred, and an alkenyl group having 3 carbon atoms (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 oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

  Particularly preferred are a methoxy group and an ethoxy group.

n ^Nd11 is preferably 1 or 2, and preferably contains both a compound in which n ^Nd11 is 1 and a compound in which n ^Nd11 is 2.

n One compound or two compounds of ^Nd11 can be used. From the viewpoint of improving the nematic phase lower limit temperature, two compounds are preferable. When two compounds are used, R ^Nd11 is used. The same substituent is preferred.

n ^Nd11 is 1 or 2 compounds, but from the viewpoint of improving the nematic phase lower limit temperature, it is preferable to use 2 compounds, and when using 2 compounds, R ^Nd12 is used. The same substituent is preferred.

In the case where both a compound in which n ^Nd11 is 1 and a compound in which n ^Nd11 is 2 are used, it is preferable to use a larger number of compounds in which n ^Nd11 is 2.

  The compound represented by the general formula (N-1d) is preferably a compound represented by the compound represented by the general formula (N-1-10) or the compound represented by the general formula (N-1-11). .

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

(In the formula, R ^N1101 and R ^N1102 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
R ^N1101 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group, a vinyl group, or a 1-propenyl group. R ^N1102 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

  Although the compound represented by general formula (N-1-10) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

  Furthermore, 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 to be represented by formulas (N-1-10.1) to (N-1-10.5), formula (N-1-10.20), and formula (N-1-10.21). It is preferable that it is a compound, Formula (N-1-10.1), Formula (N-1-10.2), Formula (N-1-10.20), and Formula (N-1-10.21) The compound represented by Formula (N-1-10.1) and the compound represented by Formula (N-1-10.2) is preferable, and the compound represented by Formula (N-1-10.1) is preferable. Are preferred.

  The 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 single Can be used in combination or can be used in combination, but the lower limit of the preferred content of these compounds alone or with respect to the total amount of the composition of the present invention is 3%, 5% 8%, 10%, 13%, 15%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %.

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

(In the formula, R ^N1111 and R ^N1112 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
^RN1111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group, a vinyl group, or a 1-propenyl group. R ^N1112 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

  Although the compound represented by general formula (N-1-11) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

  Furthermore, the compound represented by the general formula (N-1-11) is a compound selected from the group of compounds represented by the formula (N-1-11.1) to the formula (N-1-11.15). It is preferable that it is a compound represented by Formula (N-1-11.1) to (N-1-11.15), and Formula (N-1-11.2 and Formula (N- The compound represented by 1-11.4) is preferable.

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

  Selected from the compounds represented by formula (N-1-10.1), formula (N-1-10.2), formula (N-1-11.2) and formula (N-1-11.4) It is preferable to use 3 or 4 compounds, and the compounds represented by formula (N-1-10.1), formula (N-1-11.2) and formula (N-1-11.4) It is preferable to use the combination of Formula (N-1-10.1), Formula (N-1-10.2), Formula (N-1-11.2), and Formula (N-1-11.4). It is preferable to use a combination of compounds represented by

  As for the compound represented by general formula (N-1), only 1 type may be used, but 2 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 the absolute value is greater than 2).

  The compound represented by the general formula (N-1) is preferably a compound having a negative Δε and an absolute value larger than 3.

In 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, 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 2 to 5 carbon atoms. An alkenyloxy group is preferred, an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms is more preferred, and an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms is further preferred. An alkenyl group having 3 carbon atoms (propenyl group) is particularly preferable.

  Further, when the ring structure to which it is bonded is a phenyl group (aromatic), a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and carbon An alkenyl group having 4 to 5 atoms is preferable, and when the ring structure to which the alkenyl group is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a linear alkyl group having 1 to 5 carbon atoms, a straight chain A 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 oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

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

  Preferred 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 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, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, and 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, and —CH ₂ O— or a single bond is particularly preferable.

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

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

  The lower limit of the preferable content of the compound represented by the general formula (N-1) with respect to 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 upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20% It is.

  The lower 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) with respect to the total amount of the composition of the present invention is 1%. Yes, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75% Yes, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20% It is.

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

  As a compound represented by general formula (N-1), the compound group represented by the following general formula (N-1a)-(N-1g) can be mentioned.

(In the formula, 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, A ^Ng11 represents a trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group, but at least one is a 1,4-cyclohexenylene group. 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) is a compound selected from the compound group represented by the general formulas (N-1-1) to (N-1-21). preferable.

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

(In the formula, R ^N111 and R ^N112 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
^RN111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a propyl group, a pentyl group or a vinyl group. ^RN112 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group or a butoxy group.

    Although the compound represented by general formula (N-1-1) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

  Furthermore, the compound represented by the general formula (N-1-1) is a compound selected from the group of compounds represented by the formula (N-1-1.1) to the formula (N-1-1.23). It is preferable that it is a compound represented by Formula (N-1-1.1) to (N-1-1.4), and Formula (N-1-1.1) and Formula (N The compound represented by -1-1.3) is preferable.

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

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

(In the formula, R ^N121 and R ^N122 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
^RN121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group or a pentyl group. ^RN122 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and a methyl group, a propyl group, a methoxy group, an ethoxy group, or a propoxy group is preferable. preferable.

    Although the compound represented by general formula (N-1-2) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

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

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

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

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

  Although the compound represented by general formula (N-1-3) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

  Furthermore, 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 preferable that it is a compound represented by Formulas (N-1-3.1) to (N-1-3.7) and Formula (N-1-3.21), and 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 formula (N-1-3.1) to formula (N-1-3.4), formula (N-1-3.6) and formula (N-1-3.21) are singly used. Can be used in combination or in combination, but the combination of formula (N-1-3.1) and formula (N-1-3.2), formula (N-1-3.3) ), A formula (N-1-3.4), and a combination of two or three selected from formula (N-1-3.6) are preferred. The lower limit of the preferred content of these compounds alone or with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, 20% %. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

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

^{(Wherein, R N141} and ^{R N142} each independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
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 Group or butoxy group is preferred.

  Although the compound represented by general formula (N-1-4) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

  Furthermore, 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 it is a compound represented by Formula (N-1-4.1) to (N-1-4.4), and Formula (N-1-4.1) and Formula (N -1-4.2) and compounds represented by formula (N-1-4.4) are preferred.

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

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

(In the formula, R ^N151 and R ^N152 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
R ^N151 and R ^N152 are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group. Is preferred.

  Although the compound represented by general formula (N-1-5) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

  Furthermore, 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) to the formula (N-1-5.6). It is preferable that the compound represented by Formula (N-1-5.1), Formula (N-1-5.2), and Formula (N-1-5.4) is preferable.

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

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

(In the formula, R ^N1121 and R ^N1122 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
^RN1121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group. ^RN1122 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

  Although the compound represented by general formula (N-1-12) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

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

(In the formula, R ^N1131 and R ^N1132 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
^RN1131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group. R ^N1132 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

  Although the compound represented by general formula (N-1-13) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

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

(In the formula, R ^N1141 and R ^N1142 each independently represent the same meaning as R ^N11 and R ^N12 in formula (N).)
R ^N1141 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group. R ^N1142 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

  Although the compound represented by general formula (N-1-14) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

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

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

  Although the compound represented by general formula (N-1-15) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

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

(In the formula, R ^N1161 and R ^N1162 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N).)
R ^N1161 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group. R ^N1162 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

  Although the compound represented by general formula (N-1-16) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

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

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

  Although the compound represented by general formula (N-1-17) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

  The compound represented by the general formula (N-1-18) is the following compound.

( ^Wherein , R ^N1181 and R ^N1182 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N)).
^RN1181 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN1182 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

  Although the compound represented by general formula (N-1-18) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

  Furthermore, 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 it is a compound represented by Formula (N-18.1) to (N-1-11.3), and Formula (N-1-18.2 and Formula (N- The compound represented by 1-18.3) is preferable.

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

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

  Although the compound represented by general formula (N-1-20) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

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

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

  Although the compound represented by general formula (N-1-21) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

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

( ^Wherein , R ^N1221 and R ^N1222 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N)).
R ^N1221 and R ^N1222 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group.

  Although the compound represented by general formula (N-1-22) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

  Furthermore, 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). It is preferable that it is a compound represented by Formula (N-1-22.1) to (N-1-22.5), and Formula (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 dielectrically neutral compound (Δε value is −2 to 2).

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

  Although the compound represented by general formula (L) may be used independently, it can also be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types, three types, four types, five types, six types, seven types, eight types, nine types, 10 types, More than types.

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

  The compound represented by the general formula (L) is a so-called nonpolar compound having Δε of around 0. Therefore, the number of polar groups such as halogen atoms in the molecule is preferably 2 or less, preferably 1 or less, and 1 for improving the solubility with other liquid crystal compounds. It is preferable that it is not substituted when paying attention to viscosity.

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

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

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

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

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

R ^L1 and R ^L2 are a linear alkyl group having 1 to 5 carbon atoms or a linear alkyl group having 1 to 4 carbon atoms when the ring structure to which R ^L1 is bonded is a phenyl group (aromatic). When the ring structure to which the alkoxy group and the alkenyl group having 4 to 5 carbon atoms are bonded is a saturated ring structure such as cyclohexane, pyran, or dioxane, a straight chain having 1 to 5 carbon atoms is preferable. An alkyl group, 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 oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

  The alkenyl group is preferably selected from groups represented by any one of the 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 attached to the response speed, 2 or 3 is preferred for improving the upper limit temperature of the nematic phase, and 1 is preferred for balancing these. In order to satisfy the properties required for the composition, it is preferable to combine compounds having different values.

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

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

Z ^L1 and Z ^L2 are preferably single bonds when the response speed is important.

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

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

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

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

  Although the compound represented by general formula (L-1) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

  When a composition having a low viscosity and a high response speed is required, the lower limit value is high and the upper limit value is preferably high. Furthermore, when the composition of the present invention requires a high Tni and a composition having good temperature stability, it is preferable that the lower limit value is moderate and the upper limit value is moderate. When it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the lower limit value is low and the upper limit value is low. To improve the viewing angle characteristics, it is not preferable to increase the upper limit value.

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

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

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

  The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-2).

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

  Furthermore, 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). It is preferable that it is a compound represented by Formula (L-1-2.2) to Formula (L-1-2.4). In particular, the compound represented by the formula (L-1-2.2) is preferable because the response speed of the composition of the present invention is particularly improved. Moreover, when calculating | requiring Tni higher than a response speed, it is preferable to use the compound represented by a formula (L-1-2.3) or a formula (L-1-2.4). In order to improve the solubility at low temperature, the content of the compound represented by the formula (L-1-2.3) and the formula (L-1-2.4) is not preferably 30% or more.

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

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

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

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

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

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

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

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

  Furthermore, the compounds represented by the general formulas (L-1-4) and (L-1-5) are represented by the formulas (L-1-4.1) to (L-1-5.3). It is preferable that it is a compound chosen from the compound group which is said, and it is preferable that it is a compound represented by Formula (L-1-4.2) or Formula (L-1-5.2).

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

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

(In the formula, 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) with respect to the total amount of the composition of the present invention is 1%, 5%, 10%, 15% 17%, 20%, 23%, 25%, 27%, 30%, 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 33%, and 30%.

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

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

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

    Although the compound represented by general formula (L-1) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

  Furthermore, the compound represented by the general formula (L-2) is preferably a compound selected from the group of compounds represented by the formula (L-2.1) to the formula (L-2.6). It is preferable that it is a compound represented by (L-2.1), Formula (L-2.3), Formula (L-2.4), and Formula (L-2.6).

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

(In the formula, R ^L31 and R ^L32 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L).)
R ^L31 and R ^L32 are each independently preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

  Although the compound represented by general formula (L-3) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

  Furthermore, the compound represented by General Formula (L-3) is preferably a compound selected from the group of compounds represented by Formula (L-3.3) or Formula (L-3.4).

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

(In the formula, R ^L41 and R ^L42 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L).)
R ^L41 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L42 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or a carbon atom. The alkoxy group of number 1-4 is preferable. )
Although the compound represented by general formula (L-4) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

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

  Depending on the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., even if the compound represented by the formula (L-4.1) is contained, the formula (L Even if the compound represented by -4.2) is contained, both the compound represented by formula (L-4.1) and the compound represented by formula (L-4.2) are contained. Or all of the compounds represented by formula (L-4.1) to formula (L-4.3) may be included. The lower limit of the preferable content of the compound represented by the formula (L-4.1) or the formula (L-4.2) with respect to the total amount of the composition of the present invention is 3%, and 5% Yes, 7%, 9%, 11%, 12%, 13%, 18%, 21%, and the preferred upper limit is 45, 40% , 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% .

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

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

  Depending on required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., even if the compound represented by formula (L-4.4) is contained, formula (L -4.5) contains both the compound represented by formula (L-4.4) and the compound represented by formula (L-4.5). May be.

  The lower limit of the preferable content of the compound represented by the formula (L-4.4) or the formula (L-4.5) with respect to the total amount of the composition of the present invention is 3%, and 5%. Yes, 7%, 9%, 11%, 12%, 13%, 18%, 21%. Preferred upper limit values are 45, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13% %, 10%, and 8%.

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

  The compound represented by General Formula (L-4) is preferably a compound represented by Formula (L-4.7) to Formula (L-4.10), and in particular, Formula (L-4. The compound represented by 9) is preferred.

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

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

  Although the compound represented by general formula (L-5) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

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

  The compound represented by General Formula (L-5) is preferably a compound represented by Formula (L-5.3) or Formula (L-5.4).

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

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

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

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

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

  Although the compound represented by general formula (L-6) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

  The compound represented by General Formula (L-6) is preferably a compound represented by Formula (L-6.1) to Formula (L-6.9).

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It is preferable to contain 1 type-3 types from these compounds, and it is more preferable to contain 1 type-4 types. Further, since the wide molecular weight distribution of the compound to be selected is also effective for solubility, for example, one type of the compound represented by the formula (L-6.1) or (L-6.2), the formula (L- 6.4) or one type from the compound represented by (L-6.5), one type from the compound represented by formula (L-6.6) or formula (L-6.7), formula (L It is preferable to select one compound from the compounds represented by -6.8) or (L-6.9) and combine them as appropriate. Among these, it is represented by Formula (L-6.1), Formula (L-6.3), Formula (L-6.4), Formula (L-6.6), and Formula (L-6.9). It is preferable to include a compound.

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

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

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

^{(Wherein, R L71} and ^{R L72} each independently represent the same meaning as ^{R L1} and ^{R L2} in Formula ^{(L), A L71} and ^{A L72} is ^{A L2} and in the general formula (L) independently A ^L3 represents the same meaning, but the hydrogen atoms on A ^L71 and A ^L72 may be each independently substituted with a fluorine atom, Z ^L71 represents the same meaning as Z ^L2 in formula (L), X ^L71 and X ^L72 each independently represent a fluorine atom or a hydrogen atom.)
In the formula, R ^L71 and R ^L72 are each independently preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and A ^L71 and A ^L72. Are each independently preferably a 1,4-cyclohexylene group or a 1,4-phenylene group, the hydrogen atoms on A ^L71 and A ^L72 may be each independently substituted with a fluorine atom, and Z ^L71 is a single group. A bond or COO- is preferable, a single bond is preferable, and X ^L71 and X ^L72 are preferably a hydrogen atom.

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, 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) is low temperature solubility, transition temperature, electrical reliability, birefringence index, process suitability, dripping marks, It is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

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

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

  Furthermore, the compound represented by General Formula (L-7) is preferably a compound represented by Formula (L-7.1) to Formula (L-7.4), and Formula (L-7. It is preferable that it is a compound represented by 2).

  Furthermore, 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 the formula (L-7. It is preferable that it is a compound represented by 11).

  Furthermore, the compound represented by the general formula (L-7) is a compound represented by the formula (L-7.21) to the formula (L-7.23). A compound represented by 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 the formula (L-7. 31) or / and a compound represented by the formula (L-7.32).

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

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

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

  The conventional composition is a combination of a compound having a bicyclohexane skeleton represented by the formula (L-1-3.1) and a compound having a biphenyl skeleton represented by the formula (ii-3). However, the composition of the present application uses the compounds represented by the general formulas (i) and (ii), and further represented by the general formula (N-1d), the general formula (N-1), and the general formula (L). The compounds represented by formulas (i) and (ii) are contained in predetermined amounts, respectively, and further so-called neutral compounds (compounds represented by formula (i), formula (ii) The problem of the present application is solved by adjusting the content of the compound represented by the general formulas (i) and (ii) in the compound represented by the formula (L) and the compound represented by the general formula (L). .

  In general compounds (i) and (ii) in neutral compounds (compounds represented by general formula (i), compounds represented by general formula (ii) and compounds represented by general formula (L)) The lower limit value of the total preferable content of the compounds to be obtained is 20%, 25%, 30%, 35%, 38%, 40%, 42%, 45% %. The preferred upper limit is 70%, 65%, 63%, 60%, 58%, 56%, and 55%.

  The lower limit of the total preferable content of the compounds represented by the general formula (i), the general formula (ii) and the general formula (L-4.4) with respect to the total amount of the composition of the present invention is 8%. 10%, 13%, 15%, 20%. The upper limit of the preferable content is 50%, 45%, 43%, 40%, 38%, and 35%. General formula (i) and general formula (ii) in neutral compounds (compound represented by general formula (i), compound represented by general formula (ii) and compound represented by general formula (L)) And the lower limit of the preferable total content of the compounds represented by the general formula (L-4.4) is 20%, 25%, 30%, 35%, 38% , 40%, 42%, and 45%. The preferred upper limit is 70%, 65%, 63%, 60%, 58%, 56%, and 55%.

  In the composition of the present application, as a combination of neutral compounds, the compounds represented by the general formulas (i), (ii), (L-1), (L-4) and (L-5) may be combined. preferable.

  General formulas (i), (ii) and (i) in neutral compounds (compounds represented by general formula (i), compounds represented by general formula (ii) and compounds represented by general formula (L)) The lower limit of the preferable total content of the compounds represented by L-5) is 20%, 25%, 30%, 35%, 38%, 40%, 42% and 45%. The preferred upper limit is 70%, 65%, 63%, 60%, 58%, 56%, and 55%.

  The upper limit of the preferable total content of the compound having an alkenyl group relative to the total amount of the composition of the present invention is 30%, 25%, 20%, 15%, and 13%. Yes, 10%, 8%, 5%, 3%, 2%, 1%, and preferably not substantially contained. The inclusion of a compound having an alkenyl group is effective for improving the response speed, but a smaller content is preferable from the viewpoint of reliability and wavelength dispersion of Δn.

  The upper limit of the preferable total content of the compound represented by formula (N-1d) and the compound represented by 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% It is preferable that it does not contain substantially. The inclusion of a compound having an alkenyl group is effective for improving the response speed, but a smaller content is preferable from the viewpoint of reliability and wavelength dispersion of Δn.

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

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

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

  It is preferable to increase the content of a compound in which all the ring structures in the molecule are 6-membered rings, and the content of the compound in which all the ring structures in the molecule are 6-membered rings is 80% relative to the total mass of the composition. % Or more, more preferably 90% or more, still more preferably 95% or more, and the composition is composed only of a compound in which all of the ring structures in the molecule are all 6-membered rings. Most preferably.

  In order to improve stability when the composition is dispersed, 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 85% or more, preferably 87% or more, preferably 90% or more, preferably 93% or more, and 95% or more with respect to the total mass of the composition. It is preferably 98% or more, and more preferably substantially 100%. Substantially 100% means 100% excluding polymerizable compounds, stabilizers and additionally contaminated 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 as the total mass of the composition. On the other hand, it is preferably 10% or less, preferably 8% or less, more preferably 5% or less, preferably 3% or less, and still more preferably not contained.

  When importance is attached to improvement of viscosity and improvement of Tni, the content of a compound having a 2-methylbenzene-1,4-diyl group in the molecule, in which a hydrogen atom may be substituted with a halogen, may be reduced. Preferably, the content of the compound having a 2-methylbenzene-1,4-diyl group in the molecule is preferably 10% or less, more preferably 8% or less, based on the total mass of the composition. It is more preferably 5% or less, further preferably 3% or less, and still more preferably substantially not contained.

  In the present application, the phrase “not substantially contained” means that the substance is not contained except for an unintentionally contained substance.

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

The average elastic constant (K _AVG ) of the liquid crystal composition used in the present invention is preferably 10 to 25, and the lower limit thereof is preferably 10, preferably 10.5, preferably 11 and preferably 11.5. , 12 is 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 .3 is preferred, 14.5 is preferred, 14.8 is preferred, 15 is preferred, 15.3 is preferred, 15.5 is preferred, 15.8 is preferred, 16 is preferred, 16.3 is preferred, 16 .5, 16.8 is preferable, 17 is preferable, 17.3 is preferable, 17.5 is preferable, 17.8 is preferable, and 18 is preferable. 25 is preferable, 24.5 is preferable, 24 is preferable, 23.5 is preferable, 23 is preferable, 22.8 is preferable, 22.5 is preferable, 22.3 is preferable, 22 is preferable, and 21.8 is 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, 19.5 is preferred 19.3 is preferred, 19 is preferred, 18.8 is preferred, 18.5 is preferred, 18.3 is preferred, 18 is preferred, 17.8 is preferred, 17.5 is preferred, 17.3 is preferred 17 is preferable. When importance is placed on reducing power consumption, it is effective to reduce the amount of light from the backlight, and it is preferable to improve the light transmittance of the liquid crystal display element. For this purpose, the value of K _AVG should be set low. preferable. It is preferable to set a higher value of K _AVG in the case of emphasizing improved response speed.

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

(Wherein, X ²⁰¹ and X ²⁰² each independently represent a hydrogen atom or a methyl group,
Sp ²⁰¹ and Sp ²⁰² are each independently a single bond, an alkylene group having 1 to 8 carbon atoms, or —O— (CH ₂ ) _s — (wherein _s represents an integer of 2 to 7, Preferably bonded to an aromatic ring)
Z ²⁰¹ represents —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —CF ₂ O—, —OCF ₂ —, —CH ₂ CH ₂ —, —CF ₂ CF ₂ —, —CH═. CH—COO—, —CH═CH—OCO—, —COO—CH═CH—, —OCO—CH═CH—, —COO—CH ₂ CH ₂ —, —OCO—CH ₂ CH ₂ —, —CH ₂ CH ₂ —COO—, —CH ₂ CH ₂ —OCO—, —COO—CH ₂ —, —OCO—CH ₂ —, —CH ₂ —COO—, —CH ₂ —OCO—, —CY ¹ ═CY ² — (Wherein Y ¹ and Y ² each independently represents a fluorine atom or a hydrogen atom), —C≡C— or a single bond;
M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond, and all of the 1,4-phenylene groups in the formula have an arbitrary hydrogen atom as a fluorine atom, a carbon number of 1 to It may be substituted by 3 alkyl groups and / or C 1-2 alkoxy groups. ) Is preferred.

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

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

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

M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond in which any hydrogen atom may be substituted by a fluorine atom, but the 1,4-phenylene group or the single bond is preferable. When C represents a ring structure other than a single bond, Z ²⁰¹ is preferably a linking group other than a single bond. When M ²⁰¹ is a single bond, Z ²⁰¹ is preferably a single bond.

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

In the general formula (XX), when M ²⁰¹ represents a single bond and the ring structure is formed of two rings, it is preferable to represent the following formulas (XXa-1) to (XXa-7) It is more preferable to represent the formula (XXa-3) to the formula (XXa-3), the formula (XXa-6) to the formula (XXa-7), and the formula (XXa-1), the formula (XXa-2) or the formula (XXa) -6) is particularly preferred.

(In the formula, both ends shall be bonded to Sp ²⁰¹ or Sp ^202. )
The polymerizable compounds containing these skeletons are optimal for PSA-type liquid crystal display elements because of the alignment regulating power after polymerization, and a good alignment state can be obtained, so that display unevenness is suppressed or does not occur at all.

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

(In the formula, benzene may be substituted by a fluorine atom, an alkyl group having 1 to 3 carbon atoms and / or an alkoxy group having 1 to 2 carbon atoms, and Sp ²⁰ represents an alkylene group having 2 to 5 carbon atoms. .)
In the case of adding a monomer to the composition of the present invention, the polymerization proceeds even when no polymerization initiator is present, but may contain a polymerization initiator in order to accelerate the polymerization. Examples of the polymerization initiator include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides, and the like.

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

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

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

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

  In the composition of the present invention, the compound represented by the general formula (Q) preferably contains one or two kinds, more preferably contains 1 to 5 kinds, and the content thereof is from 0.001. It is preferably 1%, more preferably 0.001 to 0.1%, and particularly preferably 0.001 to 0.05%.

  More specifically, the following compounds (III-1) to (III-38) are preferred as the antioxidant or light stabilizer that can be used in the present invention.

(In the formula, n represents an integer of 0 to 20.)
The composition of the present invention preferably contains one or more compounds represented by general formula (Q) or compounds selected from general formulas (III-1) to (III-38). It is more preferable to contain 5 types, and the content is preferably 0.001 to 1%, more preferably 0.001 to 0.1%, and particularly preferably 0.001 to 0.05%.
Generally, various parameters calculated from the physical property values of the liquid crystal composition are used as a method for expressing the characteristics of the liquid crystal display element. These include γ ₁ / K ₃₃ , which governs the response speed, K ₁₁ / K ₃₃ , which governs the steepness of the electro-optic effect, and | K ₃₃ / Δε |, which governs the drive voltage. Etc. The liquid crystal composition of the present invention has both a high-speed response, a low driving voltage, good low-temperature storage stability, a wide viewing angle, and a high transmittance. Therefore, γ ₁ / K ₃₃ which is a parameter governing the response speed is 10. 0 mPa · s · pN ⁻¹ or less is preferred, 9.8 mPa · s · pN ⁻¹ or less is preferred, 9.5 mPa · s · pN ⁻¹ or less is preferred, 9.2 mPa · s · pN ⁻¹ or less is preferred, 9.0 mPa · s · pN ⁻¹ or less is particularly preferable. K ₁₁ / K ₃₃ which is a parameter governing the steepness of the electro-optic effect is preferably 1.20 or less, preferably 1.15 or less, preferably 1.10 or less, preferably 1.07 or less, and 1.05 or less. Is preferable, and 1.03 or less is particularly preferable. | K ₃₃ / Δε |, which is a parameter governing the drive voltage, is preferably 6.0 pN or less, preferably 5.7 pN or less, preferably 5.5 pN or less, preferably 5.3 pN or less, and particularly preferably 5.1 pN or less. .

  In the composition containing the polymerizable compound of the present invention, the polymerizable compound contained therein is polymerized by ultraviolet irradiation to impart liquid crystal alignment ability, and the amount of transmitted light is controlled using the birefringence of the composition. Used for liquid crystal display elements.

  The liquid crystal display device using the composition of the present invention is useful for achieving both high-speed response and suppression of display failure, and is particularly useful for a liquid crystal display device for active matrix driving. VA mode, PSVA mode, PSA It can be applied to a mode, IPS mode or ECB mode liquid crystal display element.

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

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

  In the examples, the measured characteristics 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 (mPa · s) at 293K
K ₁₁ : Elastic constant of expansion at 293K (pN)
K ₃₃ : Elastic constant of bending at 293K (pN)
In the examples, the following abbreviations are used for the description of compounds.
<Ring structure>

<Side chain structure>

(However, n in the table is a natural number.)
<Connecting structure>

(However, n in the table is a natural number.)
<Examples 1-6>
Examples include LC-1 (Example 1), LC-2 (Example 2), LC-3 (Example 3), LC-4 (Example 4), LC-5 (Example 5) and LC. A liquid crystal composition of −6 (Example 6) was prepared, and its physical properties were measured. The composition of the liquid crystal composition and the results of its physical property values are shown below.

LC-1 (Example 1), LC-2 (Example 2), LC-3 (Example 3), LC-4 (Example 4), LC-5 (Example 5) and LC-6 (Implementation) In the example 6), γ ₁ / K ₃₃ that is a parameter that governs the response speed is sufficiently small, and K ₁₁ / K ₃₃ that is a parameter that governs the steepness of the electro-optic effect is sufficiently small and governs the driving voltage. It was found that the parameter | K ₃₃ / Δε | was a sufficiently low liquid crystal composition. It was also found that Δn wavelength dispersibility was sufficiently small.

  Next, by injecting these liquid crystal compositions into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.0 μm, respectively, a vertical alignment (VA) liquid crystal display element is obtained. Obtained. These VA liquid crystal display elements were confirmed to exhibit high-speed response, low drive voltage, good low-temperature storage stability, wide viewing angle, and high transmittance.

From the above, it was 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, good low-temperature storage stability, wide viewing angle, and high transmittance.
<Comparative Examples 1-7>
As comparative examples, LC-A (Comparative Example 1), LC-B (Comparative Example 2), LC-C (Comparative Example 3), LC-D (Comparative Example 4), LC-E (Comparative Example 5), LC Liquid crystal compositions of -F (Comparative Example 6) and LC-G (Comparative Example 7) were prepared, and their physical properties were measured. The structure of the liquid crystal composition and its physical property values are shown below.

LC-A (Comparative Example 1), LC-B (Comparative Example 2), LC-C (Comparative Example 3), LC-D (Comparative Example 4), LC-E (Comparative Example 5), LC-F (Comparative) In Example 6) and LC-G (Comparative Example 7), γ ₁ / K ₃₃ , which is a parameter that governs the response speed, and K ₁₁ / K, which is a parameter that governs the steepness of the electro-optic effect, compared to the example. ₃₃ , it was found that either | K ₃₃ / Δε |, which is a parameter governing the driving voltage, or Δn wavelength dispersion or a plurality of them is inferior.

  Next, by injecting these liquid crystal compositions into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.0 μm, respectively, a vertical alignment (VA) liquid crystal display element is obtained. Obtained. The results of evaluating the electro-optical characteristics of the obtained vertical alignment (VA) liquid crystal display element are shown below. ○ in the table below shows performance equal to or better than the liquid crystal display elements obtained in the examples, and × is significantly inferior to the liquid crystal display elements obtained in the examples. Indicates confirmed item.

It has been confirmed that these VA liquid crystal display elements are inferior in response speed, drive voltage, low-temperature storage stability, viewing angle, transmittance, or a plurality thereof, compared with the display elements prepared in the examples. It was.
<Example 7 to Example 24>
A polymerizable compound represented by XX-2, XX-2-F and XX-2-O1 is added as a polymerizable compound to the prepared liquid crystal compositions LC-1 to LC6, and a polymerizable compound-containing liquid crystal composition The products MLC-1 to MLC-18 (Examples 7 to 24) were prepared.

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

By vertically injecting these polymerizable compound-containing liquid crystal compositions into cells with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.0 μm, a vertical alignment (VA) liquid crystal display device Got. The obtained VA liquid crystal display device was exposed to 10 J with a high-pressure mercury lamp having an intensity of 100 mW / cm ⁻² (365 nm) while applying a rectangular wave of 10 V and 100 Hz. Furthermore, a polymer-stabilized vertical alignment (PSVA) liquid crystal display element was obtained by 100 J exposure with the voltage turned off. These PSVA liquid crystal display elements were confirmed to exhibit the same characteristics as those of the vertical alignment (VA) liquid crystal display elements prepared in Examples 1 to 6.

  From the above, it can be seen 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, good low-temperature storage stability, wide viewing angle, and high transmittance even in a PSVA display element. It was.

Claims (4)

One or more compounds selected from compounds represented by general formula (i), one or more compounds selected from compounds represented by general formula (ii), general formula (N-1d) ) Or one or more compounds selected from the compounds represented by formula (N-1), one or more compounds selected from the compounds represented by formula (N-1), or represented by formula (L) Containing one or more compounds selected from the group consisting of dielectrically neutral compounds,
The total content of the compound represented by the general formula (i) with respect to the total amount of the composition is 3% or more, and the total content of the compound represented by the general formula (ii) with respect to the total amount of the composition is 3% or more. Yes, the total content of the compound represented by general formula (i) relative to the total amount of the compound represented by general formula (i), the compound represented by general formula (ii) and the compound represented by general formula (L) A liquid crystal composition having a negative dielectric anisotropy and an amount of 20% or more.

(In the formula, R ⁱ¹ and R ⁱⁱ¹ each independently represent an alkyl group having 1 to 5 carbon atoms, R ⁱ² and R ⁱⁱ² each independently represent a methyl group or a methoxy group,
R ^Nd11 , R ^Nd12 , R ^N11 , R ^N12 , R ^L1, and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more adjacent ones in the alkyl group Each —CH ₂ — may be independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—;
n ^Nd11 represents 1, 2 or 3; n ^N11 and n ^N12 represent 0, 1, 2 or 3; n ^N11 + n ^N12 represents 1, 2 or 3; n ^L1 represents 0, 1, 2 or 3 3
A ^N11 , A ^N12 , A ^L1 , A ^L2 and A ^L3 are each independently (a) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or _two not adjacent to each other). more -CH ₂ -. may be replaced by -O-) and (b) 1,4-phenylene group (the one present in the group -CH = or adjacent to two or more non -CH = may be replaced with -N =.
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be replaced by —N═. )
The group (a), the group (b) and the group (c) may be each independently substituted with a cyano group, a fluorine atom or a chlorine atom,
Z ^N11 , Z ^N12 , Z ^L1 and Z ^L2 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, — OCO—, —OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—
When a plurality of A ^N11 , A ^N12 , A ^L1 , A ^L2 and / or A ^L3 are present, they may be the same or different, and Z ^N11 , Z ^N12 , Z ^L1 and / or Z ^L2 may be When two or more are present, they may be the same or different, but the compound represented by the general formula (N-1) is a general formula except for the compound represented by the general formula (N-1d). The compound represented by (L) excludes compounds represented by general formula (i), general formula (ii), general formula (N-1d), and general formula (N-1). )   The liquid crystal composition having a negative dielectric anisotropy according to claim 1, further comprising a polymerizable compound.   A liquid crystal display device using the composition according to claim 1.   A VA liquid crystal display element using the liquid crystal composition according to claim 1.