TW201842382A - Liquid crystal display device - Google Patents

Abstract

The present invention addresses the problem of: providing an n-type liquid crystal composition which has improved viewing angle characteristics while satisfying various properties required of so-called n-type liquid crystal compositions having negative dielectric anisotropy ([Delta][epsilon]); and providing a liquid crystal display device using the n-type liquid crystal composition. Provided are: a liquid crystal composition having negative dielectric anisotropy, wherein the total content of a compound represented by general formula (i) is at least 3% with respect to the total amount of the composition, the total content of a compound represented by general formula (ii) is at least 3% with respect to the total amount of the composition, and the total content of the compound represented by general formula (i) is at least 20% with respect to the total amount of the compound represented by general formula (i), the compound represented by general formula (ii), and a compound represented by general formula (L); and a liquid crystal display device using the liquid crystal composition.

Description

   Liquid crystal composition and liquid crystal display element   

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

Liquid crystal display elements using a composition that shows a negative value of Δε are widely used in liquid crystal TVs and the like. In the composition used for these applications, extremely high characteristics are required in recent years. Specifically, while corresponding to the high-speed response, low power consumption, long-term and short-term reliability, and wide liquid crystal phase temperature range corresponding to the animation display, high brightness, improvement of viewing angle characteristics, and high resolution are required. Therefore, as for the liquid crystal composition, the conventionally used liquid crystal composition (Patent Documents 1, 2, and 3) is also required to meet their required characteristics, and the optimization of the liquid crystal compound contained and the content thereof are required to be optimized. In addition, it is required that display defects such as afterimages of display elements are not easily generated, dripping marks during manufacturing are not easily generated, and stable ejection properties of the composition in the ODF manufacturing process are also required.

Prior art literature Patent literature

Patent Document 1 WO2016 / 017569

Patent Document 2 Japanese Patent Application Publication No. 2016-040368

Patent Document 3 Japanese Patent Application Publication No. 2016-033132

The problem to be solved by the present invention is to provide an n-type liquid crystal composition that improves the viewing angle characteristics while satisfying the characteristics required for a so-called n-type liquid crystal composition having a negative dielectric constant anisotropy (Δε). The liquid crystal display element is used.

The present inventors reviewed various liquid crystal compounds and various chemical substances, and found that by selecting and adjusting their contents, the aforementioned problems can be solved, and the present invention has finally been completed.

The present invention provides a liquid crystal composition having a negative dielectric anisotropy, which contains one or two or more compounds selected from compounds represented by the general formula (i), One or more compounds selected from the compounds, one or two or more compounds selected from the compounds represented by the general formula (N-1d), and one or more compounds selected from the compounds represented by the general formula (N-1) One or two or more compounds selected, and one or two or more compounds selected from compounds represented by the general formula (L), based on the total amount of the composition, the total of the compounds represented by the general formula (i) The content is 3% or more, and the total content of the compound represented by the general formula (ii) is 3% or more with respect to the total amount of the composition. The compound is represented by the compound represented by the general formula (i) or the compound represented by the general formula (ii). And the total amount of the compound represented by the general formula (L), the total content of the compound represented by the general formula (i) is 20% or more; and a liquid crystal display device using the same is provided.

( ^Wherein 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, and R ^Nd11 , R ^Nd12 , R ^N11 , and R ^N12 , R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent -CH ₂ -groups can be independently -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, but n ^N11 + n ^N12 represents 1, 2 or 3, n ^L1 represents 0, 1, 2 or 3, and A ^N11 , A ^N12 , A ^L1 , A ^L2, and A ^L3 each independently represent selected from the group consisting of

(a) 1,4-cyclohexyl (1 -CH ₂ -or 2 -CH ₂ -which are not adjacent to each other in this group may be substituted with -O-) and

(b) 1,4-phenylene (1 -CH = present in this group or -CH = which is not adjacent to 2 or more can be replaced by -N =)

(c) Naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (naphthalene-2,6-diyl Or 1 -CH = present in 1,2,3,4-tetrahydronaphthalene-2,6-diyl, or 2 or more non-adjacent -CH = can be replaced by -N =) Each of the above-mentioned groups (a), (b), and (c) may be independently substituted with a cyano group, a fluorine atom, or a chlorine atom, and Z ^N11 , Z ^N12 , Z ^L1, and Z ^L2 each independently represent a single bond , -CH ₂ CH ₂ -,-(CH ₂ ) _4- , -OCH _2- , -CH ₂ O-, -COO-, -OCO-, -OCF _2- , -CF ₂ O-, -CH = NN = CH-, -CH = CH-, -CF = CF-, or -C≡C-, when A ^N11 , A ^N12 , A ^L1 , A ^L2, and / or A ^L3 are plural, they can be the same or the same When Z ^N11 , Z ^N12 , Z ^L1 and / or Z ^L2 are plural, they may be the same or different, except that the compound represented by the general formula (N-1) does not include the general formula (N-1d) The compound represented by the formula (L) does not include the compounds represented by the general formula (i), the general formula (ii), the general formula (N-1d), and the general formula (N-1)).

The so-called n-type liquid crystal composition system having negative Δε according to the present invention has excellent display characteristics while improving the viewing angle characteristics while satisfying the characteristics required for the n-type liquid crystal composition. The liquid crystal display element of the present invention is a display element suitable for a liquid crystal TV, a monitor, and the like.

Implementation of the invention

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

The composition of the present invention contains one or two or more compounds selected from the compounds represented by the general formula (i), one or two or more compounds selected from the compounds represented by the general formula (ii), One or two or more compounds selected from compounds represented by the general formula (N-1d), one or two or more compounds selected from compounds represented by the general formula (N-1), One or more compounds selected from the compounds represented by formula (L).

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

The compound represented by the general formula (i) may be used alone, or two or more kinds may be used. In view of ease of preparation, it is preferable to use only one kind.

In the general formula (i), R ^{i1 is} preferably ethyl, propyl or pentyl, more preferably ethyl or propyl, and even more preferably propyl. R ^{i2 is} preferably methoxy.

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

The compound represented by general formula (i) is preferably a compound represented by formulae (i-1) to (i-4), and more preferably a compound represented by formula (i-4).

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

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

The compound represented by the general formula (ii) may be used alone or in combination of two or more. In view of ease of preparation, it is preferable to use only one kind.

In the general formula (ii), R ^{ii1 is} preferably ethyl, propyl or pentyl, more preferably ethyl or propyl, and even more preferably propyl. R ^{ii2 is} preferably methyl.

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

The compound represented by the general formula (ii) is preferably a compound represented by the formulae (ii-1) to (ii-4), and more preferably a compound represented by the formula (ii-3).

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

The compound represented by the general formula (i) and the compound represented by the general formula (ii) are preferably those represented by the general formula (i), and more preferably the compound represented by the general formula (i) with a content of 2% or more. Shown compound.

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

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

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

The compound represented by the general formula (N-1d) may be used alone, or two or more kinds may be used.

In the general formula (N-1d), R ^{Nd11 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 2 to 8 carbon atoms. The alkenyl group of 8 is more preferably an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms. , Particularly preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, particularly preferably an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms, particularly preferably Alkenyl (propenyl) having 3 carbon atoms. 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 preferred. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, and preferably linear.

Particularly preferred are ethyl and propyl.

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 alkenyl group having 2 to 8 carbon atoms, and more preferably Alkyl group having 1 to 5 carbon atoms, alkoxy group having 1 to 5 carbon atoms, alkenyl group having 2 to 5 carbon atoms or alkenyl group having 2 to 5 carbon atoms, particularly preferably 1 to 6 carbon atoms. 5 alkyl or alkenyl having 2 to 5 carbon atoms, particularly preferably 2 to 5 carbon or alkenyl having 2 to 3 carbon atoms, and most preferably 3 alkenyl having 3 to 6 carbon atoms ( Acryl). 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 preferred. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, and preferably linear.

Particularly preferred are methoxy and ethoxy.

The n ^{Nd11 is} preferably 1 or 2, and more preferably a compound containing both n ^Nd11 is 1 and n ^Nd11 is 2.

One or two compounds of n ^Nd11 can be used, but from the viewpoint of improvement of the lower limit temperature of the nematic phase, it is preferable to use two kinds, and when two kinds are used, it is preferable to make R ^Nd11 the same Substituents.

One or two compounds of n ^Nd11 can be used, but from the viewpoint of improvement of the lower limit temperature of the nematic phase, it is preferable to use two kinds, and when two kinds are used, it is preferable to make R ^Nd12 the same Substituents.

When using a compound in which n ^Nd11 is 1 and a compound in which n ^Nd11 is 2 at the same time, it is preferable to use more compounds in which n ^Nd11 is 2

The compound represented by general formula (N-1d) is preferably a compound represented by general formula (N-1-10) and a compound represented by 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 definition as R ^N11 and R ^N12 in the 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 more preferably ethyl, propyl, butyl, vinyl, or 1-propenyl. 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 more preferably an ethoxy group, a propoxy group or a butoxy group .

The compound represented by the general formula (N-1-10) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is valued, it is preferable to set the content higher. When the solubility at low temperature is valued, the effect is higher when the content is set higher. When T _NI is valued, the effect is higher when the content is set higher. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

The lower limit of the preferable content of the compound represented by 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%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, and 13%.

The compound represented by the general formula (N-1-10) is preferably a compound selected from the compound group represented by the formula (N-1-10.1) to the formula (N-1-10.21), and more preferably Compounds represented by the formulae (N-1-10.1) to (N-1-10.5), (N-1-10.20), and (N-1-10.21), and particularly preferably the formula (N-1-10.1) Compounds represented by Formula (N-1-10.2), Formula (N-1-10.20) and Formula (N-1-10.21), and more preferably Formula (N-1-10.1) and Formula (N-1 The compound represented by -10.2) is particularly preferably a compound represented by formula (N-1-10.1).

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

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 definition as R ^N11 and R ^N12 in the general formula (N)).

R ^{N1111 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl, butyl, vinyl, or 1-propenyl. 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 more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-11) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is valued, it is preferable to set the content higher. When the solubility at low temperature is valued, the effect is higher if the content is set lower. When T _NI is valued, the effect is higher when the content is set higher. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

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

The compound represented by the general formula (N-1-11) is preferably a compound selected from the compound group represented by the formula (N-1-11.1) to the formula (N-1-11.15), and more preferably The compounds represented by the formulae (N-1-11.1) to (N-1-11.15) are particularly preferably the compounds represented by the formulae (N-1-11.2) and (N-1-11.4).

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

It is preferable to use three or four compounds represented by the formula (N-1-10.1), the formula (N-1-10.2), the formula (N-1-11.2), and the formula (N-1-11.4). The selected compound is more preferably a combination of compounds represented by formula (N-1-10.1), formula (N-1-11.2) and formula (N-1-11.4), and particularly preferably formula (N- 1-10.1), a combination of compounds represented by formula (N-1-10.2), formula (N-1-11.2), and formula (N-1-11.4).

The compound represented by the general formula (N-1) may be used alone, or two or more kinds may be used. The compound represented by the general formula (N-1) is a compound corresponding to a dielectric negative (the sign of Δε is negative, and its absolute value is greater than 2).

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

In the general formula (N-1), each of R ^N11 and R ^{N12 is} independently preferably an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, and an alkenyl group having 2 to 8 carbon atoms. Or an alkenyloxy group having 2 to 8 carbon atoms, more preferably an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or 2 carbon atoms Alkenyloxy groups of 5 are particularly preferably alkyl groups having 1 to 5 carbon atoms or alkenyl groups having 2 to 5 carbon atoms, and even more preferably alkyl groups having 2 to 5 carbon atoms or 2 to 3 carbon atoms. Alkenyl is particularly preferably an alkenyl (propenyl) group having 3 carbon atoms.

When the ring structure to which they are bonded is phenyl (aromatic), a linear alkyl group having 1 to 5 carbon atoms and a linear alkoxy group having 1 to 4 carbon atoms are preferred. And alkenyl groups with 4 to 5 carbon atoms, when the ring structure to which they are bonded is cyclohexane, piperan, and In the case of a saturated ring structure such as an alkane, a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear carbon number 2 to 2 are preferred. 5 alkenyl. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, and preferably linear.

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

An alkyl group having 1 to 5 carbon atoms and an alkoxy group having 1 to 5 carbon atoms are preferred, and methyl, ethyl, propyl, methoxy, ethoxy, and propoxy are more preferred.

When it is required to increase Δn, each of A ^N11 and A ^{N12 is} independently preferably aromatic. In order to improve the response speed, it is preferably aliphatic, and it preferably represents trans 1,4-cyclohexyl, 1,4-benzene. Base, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 2,3-difluoro-1, 4-phenylene, 1,4-cyclohexenyl, 1,4-bicyclo [2.2.2] octyl, piperidine-1,4-diyl, naphthalene-2,6-diyl, ten Hydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, more preferably the structure shown below,

Particularly preferred is trans 1,4-cyclohexyl, 1,4-cyclohexenyl or 1,4-phenylene, and particularly preferred is trans 1,4-cyclohexyl or 1,4-phenylene .

Z ^N11 and Z ^N12 each independently preferably represent -CH ₂ O-, -CF ₂ O-, -CH ₂ CH _2- , -CF ₂ CF _2- , or a single bond, more preferably -CH ₂ O-, -CH ₂ CH ₂ -or a single bond, particularly preferably -CH ₂ O- or a single bond.

n ^N11 + n ^{N12 is} preferably 1 or 2, more preferably a combination of n ^N11 is 1 and n ^N12 is 0, n ^N11 is 2 and n ^N12 is 0, n ^N11 is 1 and n ^N12 is 1 , N ^N11 is 2 and n ^N12 is 1.

However, the compound represented by general formula (N-1d) is not included.

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%, 30%, 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%.

With respect to the total amount of the composition of the present invention, the lower limit of the total preferable content of the compound represented by the general formula (N-1d) and the compound represented by the general formula (N-1) is 1%, 10%, 20%, 30%, 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%.

When the viscosity of the composition of the present invention is kept low, and a composition having a fast response speed is required, it is preferred that the above-mentioned lower limit value is lower and the upper limit value is lower. When the Tni of the composition of the present invention is kept high and a composition having good temperature stability is required, the lower limit value and the upper limit value are preferably lower. When it is desired to increase the dielectric constant anisotropy in order to maintain a low driving voltage, it is preferable to increase the above-mentioned lower limit value and the upper limit value to be higher.

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

(In the formula, R ^N11 and R ^N12 represent the same definitions as R ^N11 and R ^N12 in the general formula (N-1), n ^Na11 represents 0 or 1, n ^Nb11 represents 1 or 2, and n ^Nc11 represents 0 or 1, n ^Ne11 means 1 or 2, n ^Nf11 means 1 or 2, n ^Ng11 means 1 or 2, A ^Ne11 means trans 1,4-cyclohexyl or 1,4-phenylene, and A ^Ng11 means trans 1,4-phenylene Cyclohexyl, 1,4-cyclohexenyl, or 1,4-phenylene, but at least one represents 1,4-cyclohexenyl, and Z ^Ne11 represents a single bond or ethylene, but at least one (Ethylene).

More specifically, the compound represented by the general formula (N-1) is preferably a compound selected from the compound group represented by the general formulae (N-1-1) to (N-1-21).

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 definition as R ^N11 and R ^N12 in the general formula (N)).

R ^{N111 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably propyl, pentyl or vinyl. R ^{N112 is} preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and more preferably an ethoxy group or a butoxy group.

The compound represented by the general formula (N-1-1) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is valued, it is preferable to set the content higher. When the solubility at low temperature is valued, the effect is higher if the content is set more. When the value is set to T _NI , the effect is higher. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

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

The compound represented by the general formula (N-1-1) is preferably a compound selected from the compound group represented by the formula (N-1-1.1) to the formula (N-1-1.23), and more preferably The compounds represented by the formulae (N-1-1.1) to (N-1-1.4) are particularly preferably the compounds represented by the formulae (N-1-1.1) and (N-1-1.3).

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

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

(In the formula, R ^N121 and R ^N122 each independently represent the same definition as R ^N11 and R ^N12 in the general formula (N)).

R ^{N121 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl, butyl, or pentyl. R ^{N122 is} preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and more preferably methyl, propyl, methoxy, or ethyl Oxy or propoxy.

The compound represented by the general formula (N-1-2) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is valued, it is preferable to set the content higher. When the solubility at low temperature is valued, the effect is higher if the content is set less. When T _NI is valued, the effect is higher when the content is set more. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

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

The compound represented by the general formula (N-1-2) is preferably a compound selected from the compound group represented by the formula (N-1-2.1) to the formula (N-1-2.22), and more preferably Formula (N-1-2.3) to Formula (N-1-2.7), Formula (N-1-2.10), Formula (N-1-2.11), Formula (N-1-2.13), and Formula (N-1 The compound represented by -2.20) is preferably a compound represented by the formula (N-1-2.3) to formula (N-1-2.7) when the improvement of Δε is emphasized, and when the improvement of T _NI is emphasized, it is preferably When the compounds represented by the formula (N-1-2.10), (N-1-2.11), and (N-1-2.13) are important to improve the response speed, the formula (N-1-2.20) is preferred. Shown compound.

The compounds represented by formula (N-1-2.1) to formula (N-1-2.22) can also be used alone or in combination, but relative to the total amount of the composition of the present invention, the compounds alone or in comparison The lower limit of the optimum content is 5%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%. The upper limit of the preferred content relative to the total amount of the composition of the present invention is 50%, 40%, 38%, 35%, 33%, 30%, 28%, 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 definition as R ^N11 and R ^N12 in the general formula (N)).

R ^{N131 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl. R ^{N132 is} preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 3 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and more preferably 1-propenyl, ethoxy, and propoxy Or butoxy.

The compound represented by the general formula (N-1-3) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When attention to improving the △ ε, the content is preferably set higher, when the solubility of importance at low temperature, when the content is set more high effect, when attention T _NI, if the content is more effects set high. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

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

The compound represented by the general formula (N-1-3) is preferably a compound selected from the compound group represented by the formula (N-1-3.1) to the formula (N-1-3.21), and more preferably The compounds represented by formulae (N-1-3.1) to (N-1-3.7) and (N-1-3.21) are particularly preferably formulae (N-1-3.1) and (N-1-3.2) , A compound represented by formula (N-1-3.3), formula (N-1-3.4), and formula (N-1-3.6).

The compounds represented by the formulae (N-1-3.1) to (N-1-3.4), (N-1-3.6), and (N-1-3.21) may be used alone or in combination, but It is preferably a combination of formula (N-1-3.1) and formula (N-1-3.2), from formula (N-1-3.3), formula (N-1-3.4) and formula (N-1-3.6) The selected 2 or 3 combinations. Relative to the total amount of the composition of the present invention, the lower limit of the preferable content of these compounds alone or 5% is 10%, 13%, 15%, 17%, 20%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, and 13%.

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

(In the formula, R ^N141 and R ^N142 each independently represent the same definition as R ^N11 and R ^N12 in the general formula (N)).

R ^N141 and R ^N142 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, and more preferably a methyl group or a propyl group , Ethoxy or butoxy.

The compound represented by the general formula (N-1-4) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is valued, it is preferable to set the content higher. When the solubility at low temperature is valued, the effect is higher if the content is set more. When the value is set to T _NI , the effect is higher. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

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

The compound represented by the general formula (N-1-4) is preferably a compound selected from the compound group represented by the formula (N-1-4.1) to the formula (N-1-4.14), and more preferably The compounds represented by formulae (N-1-4.1) to (N-1-4.4) are particularly preferably formulae (N-1-4.1), (N-1-4.2), and (N-1-4.4) Shown compounds.

The compounds represented by the formulae (N-1-4.1) to (N-1-4.14) can also be used alone or in combination, but relative to the total amount of the composition of the present invention, these compounds alone or better The lower limit of the content is 3%, 5%, 7%, 10%, 13%, 15%, 17%, 20%. The upper limit of the preferred content relative to the total amount of the composition of the present invention is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 11%, 10 %,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 definition as R ^N11 and R ^N12 in the general formula (N)).

R ^N151 and R ^N152 are each independently preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and more preferably an ethyl group or a propyl group. Or butyl.

The compound represented by the general formula (N-1-5) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is valued, it is preferable to set the content higher. When the solubility at low temperature is valued, the effect is higher if the content is set less. When T _NI is valued, the effect is higher when the content is set more. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

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

The compound represented by the general formula (N-1-5) is preferably a compound selected from the compound group represented by the formula (N-1-5.1) to the formula (N-1-5.6), and more preferably Compounds represented by formula (N-1-5.1), formula (N-1-5.2) and formula (N-1-5.4).

The compounds represented by the formula (N-1-5.1), the formula (N-1-5.2) and the formula (N-1-5.4) can also be used alone or in combination, but compared with the total of the composition of the present invention The lower limit of the amount of these compounds alone or the preferred content is 5%, 8%, 10%, 13%, 15%, 17%, 20%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 33%, 30%, 28%, 25%, 23%, 20%, 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 definition as R ^N11 and R ^N12 in the general formula (N)).

R ^{N1121 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl. R ^{N1122 is} preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and more preferably an ethoxy group, a propoxy group or a butoxy group .

The compound represented by the general formula (N-1-12) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When attention to improving the △ ε, the content is preferably set higher, when the solubility of importance at low temperature, when the content is set more high effect, when attention T _NI, if the content is more effects set high. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

With respect to the total amount of the composition of the present invention, the lower limits of the preferable content of the compound represented by formula (N-1-12) are 5%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferred content relative to the total amount of the composition of the present invention is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 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 definition as R ^N11 and R ^N12 in the general formula (N)).

R ^{N1131 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl. 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 more preferably an ethoxy group, a propoxy group or a butoxy group .

The compound represented by the general formula (N-1-13) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When attention to improving the △ ε, the content is preferably set higher, when the solubility of importance at low temperature, when the content is set more high effect, when attention T _NI, if the content is more effects set high. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

With respect to the total amount of the composition of the present invention, the lower limits of the preferable content of the compound represented by the formula (N-1-13) are 5%, 10%, 13%, 15%, 17%, and 20%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 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 definition as R ^N11 and R ^N12 in the general 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 more preferably ethyl, propyl or butyl. 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 more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-14) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When attention to improving the △ ε, the content is preferably set higher, when the solubility of importance at low temperature, when the content is set more high effect, when attention T _NI, if the content is more effects set high. Moreover, when improving the dripping trace or afterimage characteristic, it is preferable to set the range of the content in the middle.

With respect to the total amount of the composition of the present invention, the lower limits of the preferable content of the compound represented by the formula (N-1-14) are 5%, 10%, 13%, 15%, 17%, and 20%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 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 definition as R ^N11 and R ^N12 in the general formula (N)).

R ^{N1151 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl. R ^{N1152 is} preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-15) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When attention to improving the △ ε, the content is preferably set higher, when the solubility of importance at low temperature, when the content is set more high effect, when attention T _NI, if the content is more effects set high. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

With respect to the total amount of the composition of the present invention, the lower limits of the preferable content of the compound represented by the formula (N-1-15) are 5%, 10%, 13%, 15%, 17%, and 20%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 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 definition as R ^N11 and R ^N12 in the 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 more preferably ethyl, propyl or butyl. 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 more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-16) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The kind of the compound to be used is, for example, one kind, two kinds, three kinds, four kinds, five kinds or more in one embodiment of the present invention.

When attention to improving the △ ε, the content is preferably set higher, when the solubility of importance at low temperature, when the content is set more high effect, when attention T _NI, if the content is more effects set high. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

With respect to the total amount of the composition of the present invention, the lower limits of the preferable content of the compound represented by the formula (N-1-16) are 5%, 10%, 13%, 15%, 17%, and 20%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 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 definition as R ^N11 and R ^N12 in the general formula (N)).

R ^{N1171 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl. R ^{N1172 is} preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-17) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When attention to improving the △ ε, the content is preferably set higher, when the solubility of importance at low temperature, when the content is set more high effect, when attention T _NI, if the content is more effects set high. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

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

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

(In the formula, R ^N1181 and R ^N1182 each independently represent the same definition as R ^N11 and R ^N12 in the general formula (N)).

R ^{N1181 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably methyl, ethyl, propyl or butyl. R ^{N1182 is} preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, more preferably an ethoxy group, a propoxy group or a butoxy group .

The compound represented by the general formula (N-1-18) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When attention to improving the △ ε, the content is preferably set higher, when the solubility of importance at low temperature, when the content is set more high effect, when attention T _NI, if the content is more effects set high. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

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

The compound represented by the general formula (N-1-18) is preferably a compound selected from the compound group represented by the formula (N-1-18.1) to the formula (N-1-18.5), and more preferably The compounds represented by the formulae (N-1-18.1) to (N-1-11.3) are particularly preferably the compounds represented by the formulae (N-1-18.2) and (N-1-18.3).

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 definition as R ^N11 and R ^N12 in the general 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 more preferably an ethyl group, a propyl group, or a butyl group.

The compound represented by the general formula (N-1-20) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When attention to improving the △ ε, the content is preferably set higher, when the solubility of importance at low temperature, when the content is set more high effect, when attention T _NI, if the content is more effects set high. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

Relative to the total amount of the composition of the present invention, the lower limits of the preferable content of the compound represented by the formula (N-1-20) are 5%, 10%, 13%, 15%, 17%, and 20%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 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 definition as R ^N11 and R ^N12 in the general formula (N)).

R ^N1211 and R ^N1212 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, or a butyl group.

The compound represented by the general formula (N-1-21) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When attention to improving the △ ε, the content is preferably set higher, when the solubility of importance at low temperature, when the content is set more high effect, when attention T _NI, if the content is more effects set high. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

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

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

(In the formula, R ^N1221 and R ^N1222 each independently represent the same definition as R ^N11 and R ^N12 in the 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 more preferably an ethyl group, a propyl group, or a butyl group.

The compound represented by the general formula (N-1-22) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When attention to improving the △ ε, the content is preferably set higher, when the solubility of importance at low temperature, when the content is set more high effect, when attention T _NI, if the content is more effects set high. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

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

The compound represented by the general formula (N-1-22) is preferably a compound selected from the compound group represented by the formula (N-1-22.1) to the formula (N-1-22.12), and more preferably The compounds represented by the formulae (N-1-22.1) to (N-1-22.5) are particularly preferably the compounds represented by the formulae (N-1-22.1) to (N-1-22.4).

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

However, the compounds represented by the general formula (i), the general formula (ii), the general formula (N-1d), and the general formula (N-1) are not included.

The compound system represented by the general formula (L) may be used alone or in combination. There are no particular restrictions on the types of compounds that can be combined, but suitable combinations are used in accordance with desired properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The kind of compound used is, for example, one kind in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are 2 types, 3 types, 4 types, 5 types, 6 types, 7 types, 8 types, 9 types, and 10 types or more.

In the composition of the present invention, the content of the compound represented by the general formula (L) must be based on solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping trace, afterimage, and dielectric. The required performance such as constant anisotropy is appropriately adjusted.

The compound represented by the general formula (L) is a so-called non-polar compound in which Δε is near 0. Therefore, the number of polar groups such as halogen atoms in the molecule is preferably 2 or less, more preferably 1 or less. In order to improve the solubility with other liquid crystal compounds, 1 is preferred. When focusing on viscosity, It is preferably unsubstituted.

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

Comparison of the compounds represented by the 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 optimum content is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%.

When the viscosity of the composition of the present invention is kept low and a composition with a fast response speed is required, it is preferred that the above-mentioned lower limit value is higher and the upper limit value is higher. When the Tni of the composition of the present invention is kept high and a composition having good temperature stability is required, it is preferable that the above-mentioned lower limit value is higher and the upper limit value is higher. When it is desired to increase the dielectric anisotropy in order to maintain a low driving voltage, it is preferable to lower the above-mentioned lower limit value and the upper limit value to be lower.

When reliability is valued, R ^L1 and R ^{L2 are} preferably both alkyl groups. When it is important to reduce the volatility of the compound, an alkoxy group is preferred. When viscosity reduction is important, at least one of them is preferably an alkenyl group.

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

When the ring structure to which R ^L1 and R ^{L2 are} bonded is phenyl (aromatic), a linear alkyl group having 1 to 5 carbon atoms and a linear carbon number 1 to 4 are preferred. Alkoxy and alkenyl with 4 to 5 carbon atoms, when the ring structure to which they are bonded is cyclohexane, piperan and di In the case of a saturated ring structure such as an alkane, a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear chain having 2 to 5 carbon atoms are preferred. Alkenyl. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, and preferably linear.

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

When the response speed is important, n ^{L1 is} preferably 0. In order to improve the upper limit temperature of the nematic phase, it is preferably 2 or 3. In order to achieve such a balance, it is preferably 1. Moreover, in order to satisfy the characteristics required as a composition, it is preferable to combine compounds of different values.

When it is required to increase △ n, A ^L1 , A ^L2 and A ^{L3 are} preferably aromatic, in order to improve the response speed, preferably aliphatic, and preferably each independently represent trans 1,4-cyclohexyl, 1, 4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 1,4-phenylene Cyclohexenyl, 1,4-bicyclo [2.2.2] octyl, piperidine-1,4-diyl, naphthalene-2,6-diyl, decalin-2,6-diyl, or 1 , 2,3,4-tetrahydronaphthalene-2,6-diyl, more preferably the structure shown below,

More preferred is trans 1,4-cyclohexyl or 1,4-phenylene.

When the response speed is important, Z ^L1 and Z ^{L2 are} preferably single bonds.

The number of halogen atoms in the compound-based molecule represented by the general formula (L) is preferably 0 or 1.

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

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

(In the formula, R ^L11 and R ^L12 each independently represent the same definition 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 alkyl group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. .

The compound represented by the general formula (L-1) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

With respect to the total amount of the composition of the present invention, the lower limits of the preferred content are 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 preferred content is 40%, 35%, 33%, 30%, 25%.

When the viscosity of the composition of the present invention is kept low, and a composition having a fast response speed is required, it is preferred that the above-mentioned lower limit value is higher and the upper limit value is higher. Furthermore, when Tni of the composition of the present invention is kept high, and a composition having good temperature stability is required, it is preferable that the above-mentioned lower limit value is moderate and the upper limit value is moderate. When it is desired to increase the dielectric constant anisotropy in order to maintain a low driving voltage, the lower limit value and the upper limit value are preferably lower. In order to improve the viewing angle characteristics, it is not appropriate to increase the upper limit.

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

( ^Wherein R ^L12 represents the same definition as in the general formula (L-1)).

The compound represented by general formula (L-1-1) is preferably a compound selected from the compound group represented by formula (L-1-1.1) to formula (L-1-1.3), and more preferably formula (L The compound represented by -1-1.2) or formula (L-1-1.3) is particularly preferably a compound represented by formula (L-1-1.3).

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

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

( ^Wherein R ^L12 represents the same definition as in the general formula (L-1)).

Relative to the total amount of the composition of the present invention, the lower limits of the preferable content of the compound represented by the formula (L-1-2) are 1%, 5%, 10%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 35%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content is 60%, 55%, 50%, 45%, 42%, 40%, 38%, 35%, 33%, 30%.

The compound represented by the general formula (L-1-2) is preferably a compound selected from the compound group represented by the formula (L-1-2.1) to the formula (L-1-2.4), and more preferably Compounds represented by formula (L-1-2.2) to formula (L-1-2.4). In particular, in order to improve the response speed of the composition of the present invention, a compound represented by the formula (L-1-2.2) is preferred. When Tni having a higher response speed is required, it is preferable to use a compound represented by the formula (L-1-2.3) or (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) should not be 30% or more.

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

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

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

( ^Wherein 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 alkyl group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. .

Relative to the total amount of the composition of the present invention, the lower limits of the preferable content of the compound represented by the formula (L-1-3) are 1%, 5%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 30%. The upper limit of the preferred content relative to the total amount of the composition of the present invention is 60%, 55%, 50%, 45%, 40%, 37%, 35%, 33%, 30%, 27%, 25 %, 23%, 20%, 17%, 15%, 13%, 10%.

The compound represented by the general formula (L-1-3) is preferably a compound selected from the compound group represented by the formula (L-1-3.1) to the formula (L-1-3.12), and more preferably The compound represented by a formula (L-1-3.1), a formula (L-1-3.3), or a formula (L-1-3.4). In particular, in order to improve the response speed of the composition of the present invention, a compound represented by the formula (L-1-3.1) is preferred. When Tni with a higher response speed is required, it is preferable to use the formula (L-1-3.3), the formula (L-1-3.4), the formula (L-1-3.11), and the formula (L-1-3.12). ). In order to improve the solubility at low temperature, the total 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 should not be more than 20%.

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

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

( ^Wherein 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 carbon atoms is preferably a linear alkyl group of 1 to 5 carbon atoms, a straight-chain carbon number of the alkoxy group having 1 to 4 atoms and straight-chain alkenyl group of 2 to 5 .

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

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

The compounds represented by the general formulae (L-1-4) and (L-1-5) are preferably a compound group represented by the formula (L-1-4.1) to the formula (L-1-5.3). The selected compound is more preferably a compound represented by the formula (L-1-4.2) or (L-1-5.2).

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

Preferably, the combination of 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), more preferably a combination of formula (L-1-1.3) and formula (L-1- 2.2), two or more compounds selected from the compounds represented by formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4) and formula (L-1-4.2) Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the total content of these compounds is 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15% , 18%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, relative to the total amount of the composition of the present invention, the upper limit is 80%, 70%, 60%, 50 %, 45%, 40%, 37%, 35%, 33%, 30%, 28%, 25%, 23%, 20%. When the reliability of the composition is important, it is preferable to combine two or more kinds selected from the compounds represented by the formula (L-1-3.1), (L-1-3.3), and (L-1-3.4)). When the response speed of the composition is important, the compound is preferably a combination of two or more compounds selected from the compounds represented by formula (L-1-1.3) and formula (L-1-2.2).

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).

( ^Wherein R ^L17 and R ^L18 each independently represent a methyl group or a hydrogen atom).

With respect to the total amount of the composition of the present invention, the lower limits of the preferable content of the compound represented by the formula (L-1-6) are 1%, 5%, 10%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 35%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content is 60%, 55%, 50%, 45%, 42%, 40%, 38%, 35%, 33%, 30%.

The compound represented by the general formula (L-1-6) is preferably a compound selected from the compound group represented by the formula (L-1-6.1) to the formula (L-1-6.3).

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

(In the formula, R ^L21 and R ^L22 each independently represent the same definition 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} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 4 to 5 carbon atoms or Alkoxy having 1 to 4 carbon atoms.

The compound represented by the general formula (L-1) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the solubility at low temperature is valued, the effect is high when the content is set more. On the contrary, when the response speed is valued, the effect is high when the content is set less. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

Relative to the total amount of the composition of the present invention, the lower limits of the preferable content of the compound represented by the formula (L-2) are 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 preferred content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

The compound represented by the general formula (L-2) is preferably a compound selected from the compound group represented by the formula (L-2.1) to the formula (L-2.6), and more preferably the compound (L-2.1) , A compound represented by formula (L-2.3), formula (L-2.4), and formula (L-2.6).

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

(In the formula, R ^L31 and R ^L32 each independently represent the same definition as R ^L1 and R ^L2 in the general formula (L)).

R ^L31 and R ^L32 are each independently preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.

The compound represented by the general formula (L-3) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

Relative to the total amount of the composition of the present invention, the lower limits of the preferable content of the compound represented by the formula (L-3) are 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 preferred content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

When a high birefringence is obtained, the effect is high if the content is set more. Conversely, when high Tni is valued, the effect is high when the content is set less. Moreover, when improving dripping marks or afterimage characteristics, it is preferable to set the range of the content in the middle.

The compound represented by general formula (L-3) is preferably a compound selected from the compound group represented by formula (L-3.3) or formula (L-3.4).

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

(In the formula, R ^L41 and R ^L42 each independently represent the same definition as R ^L1 and R ^L2 in the 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} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 4 to 5 carbon atoms or Alkoxy having 1 to 4 carbon atoms).

The compound represented by the general formula (L-4) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-4) must be based on solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping traces, afterimages, The required performance such as the dielectric constant anisotropy is appropriately adjusted.

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

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

It may contain a compound represented by the formula (L-4.1) or a compound represented by the formula (L-4.2) according to required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. It may contain both the compound represented by the formula (L-4.1) and the compound represented by the formula (L-4.2), and may also include all the compounds represented by the formula (L-4.1) to the formula (L-4.3) . The lower limit of the preferred content of the compound represented by formula (L-4.1) or formula (L-4.2) is 3%, 5%, 7%, 9%, 11 with respect to the total amount of the composition of the present invention. %, 12%, 13%, 18%, 21%, the preferred upper limits are 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13% , 10%, 8%.

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

The compound represented by general formula (L-4) is, for example, preferably a compound represented by formula (L-4.4) to formula (L-4.6), and more preferably a compound represented by formula (L-4.4).

It may contain a compound represented by the formula (L-4.4) or a compound represented by the formula (L-4.5) according to required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. It may contain both a compound represented by the formula (L-4.4) and a compound represented by the formula (L-4.5).

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

When both the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5) are contained, the lower limit of the preferable content of the two compounds is 15 relative to the total amount of the composition of the present invention. %, 19%, 24%, 30%, and the preferred upper limits are 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, and 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 particularly preferably a compound represented by formula (L-4.9).

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

(In the formula, R ^L51 and R ^L52 each independently represent the same definition 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} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 4 to 5 carbon atoms or Alkoxy having 1 to 4 carbon atoms.

The compound represented by the general formula (L-5) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-5) must be based on solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping traces, afterimages, The required performance such as the dielectric constant anisotropy is appropriately adjusted.

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

The compound represented by general formula (L-5) is preferably a compound represented by formula (L-5.1) or (L-5.2), and particularly preferably a compound represented by formula (L-5.1).

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

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

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

The compound represented by the general formula (L-5) is preferably a compound selected from the compound group represented by the formula (L-5.5) to the formula (L-5.7), and particularly preferably the compound represented by the formula (L-5.7) Compound.

Relative to the total amount of the composition of the present invention, the lower limits of the preferred content of these compounds are 1%, 2%, 3%, 5%, 7%. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, 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 definition 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. One of X ^L61 and X ^L62 is preferably a fluorine atom and the other Is a hydrogen atom.

The compound represented by the general formula (L-6) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, but are suitably used in combination in accordance with required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound used is, for example, one, two, three, four, five or more in one embodiment of the present invention.

The lower limit of the preferred content of the compound represented by formula (L-6) is 1%, 2%, 3%, 5%, 7%, 10%, 14% with respect to the total amount of the composition of the present invention. , 16%, 20%, 23%, 26%, 30%, 35%, 40%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content of the compound represented by formula (L-6) is 50%, 40%, 35%, 30%, 20%, 15%, 10% , 5%. When focusing on increasing Δn, the content should be increased, and when focusing on precipitation at low temperature, the content should be less.

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

The type of the compound that can be combined is not particularly limited, but it is preferred to contain one to three kinds of these compounds, and it is more preferable to contain one to four kinds. In addition, since a selected compound having a wide molecular weight distribution is also effective in solubility, for example, it is preferable to select one kind from a compound represented by formula (L-6.1) or (L-6.2), and from the formula (L-6.4) ) Or (L-6.5), one compound is selected, and one compound is selected from the compound (L-6.6) or (L-6.7), and one compound is selected from the compound (L-6.8) or (L-6.9). The compounds shown are selected from one type of compound, and these are suitably combined. Among them, it is preferable to include a compound represented by formula (L-6.1), formula (L-6.3), formula (L-6.4), formula (L-6.6), and formula (L-6.9).

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

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

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

(In the formula, R ^L71 and R ^L72 each independently represent the same definition as R ^L1 and R ^L2 in general formula (L), and A ^L71 and A ^L72 each independently represent the same as A ^L2 and A ^{L3 has the} same definition, but hydrogen atoms on A ^L71 and A ^L72 can be independently replaced by fluorine atoms, Z ^L71 represents the same definition as Z ^L2 in general formula (L), and X ^L71 and X ^L72 are each independently (Representing 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 Each independently is preferably 1,4-cyclohexyl or 1,4-phenylene. The hydrogen atoms on A ^L71 and A ^L72 are each independently ^replaceable by a fluorine atom. Z ^{L71 is} preferably a single bond or COO- Is more preferably a single bond, and X ^L71 and X ^{L72 are} preferably hydrogen atoms.

The types of compounds that can be combined are not particularly limited, but are combined in accordance with the required properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The type of the compound used is, for example, 1 type, 2 types, 3 types, or 4 types in one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-7) must be based on solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping traces, afterimages, The required performance such as the dielectric constant anisotropy is appropriately adjusted.

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

When an embodiment of high Tni is desired for the composition of the present invention, it is preferred to increase the content of the compound represented by formula (L-7), and when an embodiment of low viscosity is desired, the content is preferably reduced.

The compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.1) to formula (L-7.4), and more preferably a compound represented by formula (L-7.2).

The compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.11) to formula (L-7.13), and more preferably a compound represented by formula (L-7.11).

The compound represented by general formula (L-7) is a compound represented by formula (L-7.21) to formula (L-7.23). A compound represented by formula (L-7.21) is preferred.

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

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

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

The total of the compounds represented by the 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 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%. The upper limit of the preferred content is 100%, 99%, 98%, 95%.

A conventional composition is a combination of a compound having a bicyclohexane skeleton represented by the formula (L-1-3.1) of the present case and a compound having a biphenyl skeleton represented by the formula (ii-3), but the composition of the present case is The compounds represented by the general formulae (i) and (ii) are used, and the compounds represented by the general formulae (N-1d), (N-1), and (L) are further used. For compounds represented by general formulae (i) and (ii), the so-called neutral compounds (compounds represented by general formula (i), compounds represented by general formula (ii), and compounds represented by general formula (L) are further adjusted. The content of the compound represented by the general formulae (i) and (ii) in the compound) solves the problem of the present case.

Compounds represented by general formulae (i) and (ii) among 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 total preferred content is 20%, 25%, 30%, 35%, 38%, 40%, 42%, 45%. The preferred upper limits are 70%, 65%, 63%, 60%, 58%, 56%, 55%.

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

In the composition of the present case, the combination of the neutral compounds is preferably a combination of the compounds represented by the general formulae (i), (ii), (L-1), (L-4), and (L-5).

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

With respect to the total amount of the composition of the present invention, the upper limit of the total preferred content of the compound having an alkenyl group is 30%, 25%, 20%, 15%, 13%, 10%, 8%, 5%, 3%, 2%, 1%, preferably not substantially. If a compound having an alkenyl group is included, it is effective in improving the response speed, but from the viewpoint of reliability or wavelength dispersion of Δn, the content is preferably small.

The upper limit of the total preferred content of the compound represented by the general formula (N-1d) and the compound represented by the general formula (N-1) with an alkenyl group with respect to the total amount of the composition of the present invention is 20%, 18%, 15%, 13%, 10%, 8%, 5%, 3%, 2%, 1%, preferably not substantially contained. If a compound having an alkenyl group is included, it is effective in improving the response speed, but from the viewpoint of reliability or wavelength dispersion of Δn, the content is preferably small.

The composition of the present invention is preferably a compound that does not contain a structure in which oxygen atoms such as a peracid (-CO-OO-) structure are bonded to each other.

When the reliability and long-term stability of the composition are important, the content of the compound having a carbonyl group is preferably 5% or less, more preferably 3% or less, and even more preferably 1% or less relative to the total mass of the aforementioned composition. It is best not to contain substantially.

When the stability of UV irradiation is important, the content of the chlorine atom-substituted compound is preferably 15% or less, more preferably 10% or less, particularly preferably 8% or less, more than the total mass of the foregoing composition. The content is preferably 5% or less, more preferably 3% or less, and particularly preferably not substantially contained.

It is preferable to increase the content of compounds having a 6-membered ring structure in the ring structure, and the content of compounds having 6-membered ring structures in the molecule is preferably set to 80% or more relative to the total mass of the foregoing composition. It is more preferably 90% or more, even more preferably 95% or more, and most preferably, the composition is constituted of only a compound having a 6-membered ring structure in the molecule.

In order to improve the dispersion and stability of the composition, it is preferable to increase the content of the compound having a side chain of an alkyl group and an alkoxy group, and the content of the compound having a side chain of an alkyl group and an alkoxy group relative to the total mass of the foregoing composition It is preferably set to 85% or more, more preferably 87% or more, more preferably 90% or more, even more preferably 93% or more, even more preferably 95% or more, and more preferably 98% or more. The optimal setting is substantially 100%. The term "substantially 100%" means that the polymerizable compound, the stabilizer, and the impurities additionally mixed therein are 100%.

In order to suppress the degradation of the composition due to oxidation, it is preferable to reduce the content of the compound having a cyclohexenyl group as a ring structure. The content of the compound having a cyclohexenyl group is better than the total mass of the foregoing composition It is 10% or less, more preferably 8% or less, even more preferably 5% or less, even more preferably 3% or less, and particularly preferably not substantially contained.

When the improvement of viscosity and the improvement of Tni are important, it is preferable to reduce the content of a compound having a 2-methylbenzene-1,4-diyl group in which a hydrogen atom can be replaced with a halogen atom, relative to the total of the foregoing composition. Quality, the content of the aforementioned compound having 2-methylbenzene-1,4-diyl in the molecule is preferably 10% or less, more preferably 8% or less, even more preferably 5% or less, and even more preferably It is preferably 3% or less, and it is particularly preferable that it is not substantially contained.

In the present case, the term “substantially not contained” means that it is not contained after excluding accidentally contained substances.

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 aforementioned alkenyl group is bonded to cyclohexane, the number of carbon atoms of the alkenyl group is preferably 2 to 5. In the case where the aforementioned alkenyl group is bonded to benzene, the number of carbon atoms of the alkenyl group is preferably 4 to 5, and the unsaturated bond of the aforementioned alkenyl group and benzene is preferably not directly bonded.

The average elastic constant (K _AVG ) of the liquid crystal composition used in the present invention is preferably 10 to 25, and as its lower limit, it is preferably 10, preferably 10.5, preferably 11, and preferably 11.5. 12 is preferred, 12.3 is preferred, 12.5 is preferred, 12.5 is preferred, 12.8 is preferred, 13 is preferred, 13.3 is preferred, 13.5 is preferred, 13.8 is preferred, 14 is preferred, 14 is preferred, 14.3 is preferred, Preferably 14.5, preferably 14.8, preferably 15, preferably 15.3, preferably 15.5, preferably 15.8, preferably 16, preferably 16.3, preferably 16.5, preferably 16.8, It is preferably 17, preferably 17.3, preferably 17.5, preferably 17.8, and preferably 18, as the upper limit value, preferably 25, preferably 24.5, preferably 24, and preferably 23.5. It is preferably 23, preferably 22.8, preferably 22.5, preferably 22.3, preferably 22, preferably 21.8, preferably 21.5, preferably 21.3, preferably 21, and preferably 20.8, It is preferably 20.5, preferably 20.3, preferably 20, preferably 19.8, preferably 19.5, preferably 19.3, preferably 19, preferably 18.8, preferably 18.5, and preferably 18.3, It is preferably 18, preferably 17.8, preferably 17.5, and preferably 17. 3, preferably 17. When it is important to reduce power consumption, it is effective to suppress the amount of light in the backlight. It is better to increase the light transmittance of the liquid crystal display device. Therefore, it is preferable to set the value of K _AVG lower. When the improvement of response speed is important, it is preferable to set the value of K _AVG higher.

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 transverse electric field type PSA mode, or a transverse electric field type PSVA mode. Examples of the polymerizable compound that can be used include photopolymerizable monomers that are polymerized by energy rays such as light. Examples of the structure include six members including biphenyl derivatives and bitriphenyl derivatives. The ring is a polymerizable compound having a plurality of liquid crystal skeletons connected to each other. More specifically, a bifunctional monomer represented by the general formula (XX) is preferred.

(In the formula, X ²⁰¹ and X ²⁰² each independently represent a hydrogen atom or a methyl group, and 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 -(Where s represents an integer of 2 to 7, and an oxygen atom is bonded to an aromatic ring), and 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 represent a fluorine atom or a hydrogen atom), -C≡C -Or single bond, M ²⁰¹ represents 1,4-phenylene, trans 1,4-cyclohexyl or single bond, all 1,4-phenylene in the formula can be any fluorine atom, carbon 1 to 3 alkyl groups and / or 1 to 2 carbon alkoxy groups are substituted).

X ²⁰¹ and X ^{202 are each} preferably a diacrylate derivative having a hydrogen atom, or a dimethacrylate derivative having a methyl group, and it is more preferable that one of them represents a hydrogen atom and the other A compound representing a methyl group. The polymerization rate of these compounds is that the diacrylate derivative is the fastest, the dimethacrylate derivative is slow, and the asymmetric compound is the middle, so it can be used according to its application. Among PSA display elements, dimethacrylate derivatives are particularly preferred.

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, it is preferable that at least one of them is a single bond. Preferably, the compounds each represent a single bond, or one of them is a single bond and the other represents an alkylene group having 1 to 8 carbon atoms or -O- (CH ₂ ) _s- . In this case, 1 to 4 alkyl groups are preferred, and s is preferably 1 to 4.

Z ^{201 is} preferably -OCH _2- , -CH ₂ O-, -COO-, -OCO-, -CF ₂ O-, -OCF _2- , -CH ₂ CH _2- , -CF ₂ CF ₂ -or single Bond, more preferably -COO-, -OCO- or a single bond, particularly preferably a single bond.

M ²⁰¹ represents 1,4-phenylene, trans 1,4-cyclohexyl, or a single bond whose arbitrary hydrogen atom may be substituted by a fluorine atom, and preferably 1,4-phenylene or a single bond. When C represents a ring structure other than a single bond, Z ^{201 is} also preferably a linking group other than a single bond. When M ²⁰¹ is a single bond, Z ^{201 is} preferably a single bond.

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

In the general formula (XX), M ²⁰¹ represents a single bond, and when the ring structure is formed by two rings, the following formulae (XXa-1) to (XXa-7) are preferred, and the formula (XXa- 1) to Formula (XXa-3), Formula (XXa-6) to Formula (XXa-7), and particularly preferred is Expression (XXa-1), Formula (XXa-2) or Formula (XXa-6).

(In the formula, both ends are bonded to Sp ²⁰¹ or Sp ^202. )

Since a polymerizable compound containing such a skeleton has an alignment control force that is most suitable for a PSA liquid crystal display device after polymerization, and obtains a good alignment state, display unevenness is suppressed or does not occur at all.

As described above, the polymerizable monomers are particularly preferably the general formula (XX-1) to the general formula (XX-4), and the most preferable is the general formula (XX-2).

(In the formula, benzene may be substituted with 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.)

When a monomer is added to the composition of the present invention, the polymerization proceeds even when a polymerization initiator is not present, but it may contain a polymerization initiator in order to promote the polymerization. Examples of the polymerization initiator include benzoin ethers, diphenyl ketones, acetophenones, benzyl ketals, and fluorenylphosphine oxides.

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

(In the formula, R ^Q represents a linear alkyl group or branched alkyl group having 1 to 22 carbon atoms. One or two or more CH ₂ groups in the alkyl group are in such a manner that oxygen atoms are not directly adjacent to each other. By -O-, -CH = CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF _2- , the hydrogen atom in R ^Q can be replaced by 4 -Hydroxy-3,5-di-tert-butylphenyl, M ^Q represents trans 1,4-cyclohexyl, 1,4-phenyl or single bond, but trans 1,4-cyclohexyl 1 or 2 non-adjacent -CH ₂ -may be replaced by -O-).

R ^Q represents a straight-chain or branched-chain alkyl group having 1 to 22 carbon atoms, and one or more CH ₂ groups in the alkyl group are not directly adjacent to each other by an oxygen atom, and may be -O- -CH = CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ -substituted, preferably a linear alkane having 1 to 10 carbon atoms Group, linear alkoxy group, 1 CH ₂ group is substituted with -OCO- or -COO- linear alkyl group, branched alkyl group, branched alkoxy group, 1 CH ₂ group is substituted with -OCO -Or -COO- branched alkyl group, more preferably a linear alkyl group having 1 to 20 carbon atoms, and one CH ₂ group substituted with -OCO- or -COO- linear alkyl group or branched alkyl group Group, branched alkoxy group, and one CH ₂ group are substituted with -OCO- or -COO- branched alkyl group. M ^Q represents trans 1,4-cyclohexyl, 1,4-phenylene, or a single bond, and is preferably trans 1,4-cyclohexyl or 1,4-phenylene.

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

In the formula, R ^{Q1 is} preferably a straight or branched alkyl group having 1 to 10 carbon atoms, R ^{Q2 is} preferably a straight or branched alkyl group having 1 to 20 carbon atoms, and R ^Q3 is more It is preferably a straight-chain alkyl group, branched-chain alkyl group, straight-chain alkoxy group, or branched-chain alkoxy group having 1 to 8 carbon atoms, and L ^{Q is} preferably a straight-chain alkyl group or branched chain having 1 to 8 carbon atoms. Chain extension alkyl. Among the compounds represented by general formulae (Qa) to (Qd), compounds represented by general formulae (Qc) and (Qd) are more preferred.

In the composition of the present invention, it is preferred to contain one or two compounds represented by the general formula (Q), more preferably one to five compounds, and the content thereof is preferably 0.001 to 1%, more preferably It is 0.001 to 0.1%, particularly preferably 0.001 to 0.05%.

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

(Where n is an integer from 0 to 20).

In the composition of the present invention, it is preferable to contain one or two or more compounds selected from the compounds represented by the general formula (Q) or the compounds selected from the general formulae (III-1) to (III-38), and more preferably To contain one to five kinds, 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. Among them, there are γ ₁ / K ₃₃ that governs the response speed, K ₁₁ / K ₃₃ that governs the steepness of the photoelectric effect, and | K ₃₃ / △ ε | that governs the parameters of the driving voltage. The liquid crystal composition of the present invention has both high-speed response, low driving voltage, good low-temperature storage, wide viewing angle, and high transmittance. Thus, gamma] parameters govern the response speed of ₁ / K ₃₃ is preferably 10.0mPa‧s‧pN ^-1 or less, more preferably 9.8mPa‧s‧pN ^-1 or less, particularly preferably 9.5mPa‧s‧pN ^-1 Below, it is particularly preferably below 9.2 mPa‧s‧pN ^-1 , and particularly preferably below 9.0 mPa‧s‧pN ^-1 . K ₁₁ / K _{33, which} governs the steepness of the photoelectric effect, is preferably 1.20 or less, more preferably 1.15 or less, particularly preferably 1.10 or less, particularly preferably 1.07 or less, even more preferably 1.05 or less, and particularly preferably 1.03. the following. The parameter that governs the driving voltage | K ₃₃ / Δε | is preferably 6.0 pN or less, more preferably 5.7 pN or less, even more preferably 5.5 pN or less, even more preferably 5.3 pN or less, and particularly preferably 5.1 pN or less.

The polymerizable compound-containing composition of the present invention is a liquid crystal display capable of imparting liquid crystal alignment ability by polymerizing the polymerizable compound contained therein by ultraviolet irradiation, and is used to control the amount of transmitted light through the birefringence of the composition. element.

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

In addition, in the manufacturing process of the liquid crystal display element of the ODF method, the most suitable liquid crystal injection amount must be dropped according to the size of the liquid crystal display element. The pressure change or the impact on the impact is small, and the liquid crystal can be continuously dripped stably for a long time. Therefore, the yield of the liquid crystal display element can be maintained high. In particular, the small-sized liquid crystal display elements that are frequently used in recent popular smart phones have a small amount of the most suitable liquid crystal injection, so it is difficult to control the deviation from the most suitable value within a certain range, but by using this case, The liquid crystal composition of the invention can realize a stable liquid crystal material discharge amount even in a small liquid crystal display element.

    [Example]    

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited by these examples. In addition, "%" in the composition of the following examples and comparative examples means "mass%."

In the examples, the measured characteristics are as follows.

T _ni : nematic phase-isotropic liquid phase transition temperature (° C)

△ n: refractive index anisotropy at 293K

Δε: dielectric anisotropy at 293K

γ ₁ : Rotational viscosity at 293K (mPa‧s)

K ₁₁ : extended elastic constant (pN) at 293K

K ₃₃ : bending elastic constant (pN) at 293K

In the description of the compounds in the examples, the following abbreviations are used.

    <Ring structure>    

    <Side chain structure>    

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

    <Link structure>    

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

    <Examples 1 to 6>    

As examples, LC-1 (Example 1), LC-2 (Example 2), LC-3 (Example 3), LC-4 (Example 4), LC-5 (Example 5), and The LC-6 (Example 6) liquid crystal composition was measured for its physical properties. The results of the composition of the liquid crystal composition and its physical properties are shown below.

It can be seen that LC-1 (Example 1), LC-2 (Example 2), LC-3 (Example 3), LC-4 (Example 4), LC-5 (Example 5) and LC-6 ( Example 6) γ ₁ / K _{33, which} is the parameter that governs the response speed, is sufficiently small, K ₁₁ / K ₃₃ , which is the parameter that governs the steepness of the photoelectric effect, is sufficiently small, and that that governs the driving voltage parameter | K ₃₃ / △ ε | A sufficiently low liquid crystal composition. It was also found that the wavelength dispersion of Δn was sufficiently small.

Then, by vacuum injection method, these liquid crystal compositions were respectively injected into the unit cell with 3.0 μm of the polyimide alignment film that induces vertical alignment, and the vertical alignment ( VA) Liquid crystal display element. It was confirmed that these VA liquid crystal display elements exhibit high-speed response, low driving voltage, good low-temperature storage, wide viewing angle, and high transmittance.

From the above, it can be seen that the liquid crystal composition of the present invention can fully have an excellent liquid crystal composition having high-speed response, low driving voltage, good low-temperature storage, wide viewing angle, and high transmittance.

    <Comparative Examples 1 to 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-F (Comparative Example 6) and LC-G (Comparative Example 7) liquid crystal compositions were measured for their physical properties. The composition of the liquid crystal composition and its physical properties are shown below.

Compared with the examples, it can be seen that 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 Example 6) and LC-G (Comparative Example 7) are parameters γ ₁ / K ₃₃ that govern the response speed, parameters K ₁₁ / K ₃₃ that govern the steepness of the photoelectric effect, and control drive voltage Either | K ₃₃ / △ ε | or the wavelength dispersion of △ n is inferior.

Then, by vacuum injection method, these liquid crystal compositions were respectively injected into the unit cell with 3.0 μm of the polyimide alignment film that induces vertical alignment, and the vertical alignment ( VA) Liquid crystal display element. The results of the evaluation of the photoelectric characteristics of the vertical alignment (VA) liquid crystal display element are shown below. In the table below, ○ indicates that the performance is equal to or higher than that of the liquid crystal display element obtained in the example, and X indicates that it is confirmed to be significantly worse than the liquid crystal display element obtained in the example.

In comparison with the display elements made in the examples, it was confirmed that these VA liquid crystal display elements are inferior in response speed, driving voltage, low-temperature storage, viewing angle, and transmittance, or a plurality of them.

    <Example 7 to Example 24>    

To the prepared liquid crystal compositions LC-1 to LC6, a polymerizable compound represented by XX-2, XX-2-F, and XX-2-O1 is added as a polymerizable compound to prepare a liquid crystal composition MLC containing a polymerizable compound. -1 to MLC-18 (Examples 7 to 24).

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

These liquid crystal compositions containing a polymerizable compound were respectively injected into a unit cell with 3.0 μm of cell gap and coated with polyimide alignment film that induces vertical alignment with ITO by a vacuum injection method to obtain Vertical alignment (VA) liquid crystal display element. The obtained VA liquid crystal display element 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 exposure at 100 J in a state where the voltage was cut off. It was confirmed that these PSVA liquid crystal display elements have the same characteristics as those of the vertical alignment (VA) liquid crystal display elements prepared in Examples 1 to 6.

As can be seen from the above, the liquid crystal composition of the present invention is an excellent liquid crystal composition that can fully take into account high-speed response, low driving voltage, good low-temperature storage, wide viewing angle, and high transmittance even in PSVA display elements. .

Claims (4)

A liquid crystal composition having a negative dielectric constant anisotropy, comprising one or two or more compounds selected from the compounds represented by the general formula (i), and one selected from the compounds represented by the general formula (ii) One or two or more compounds, one or two or more compounds selected from compounds represented by the general formula (N-1d), one or two selected from compounds represented by the general formula (N-1) One or two or more compounds, or one or two or more compounds selected from a dielectrically neutral compound represented by the general formula (L), the compound represented by the general formula (i) with respect to the total amount of the composition The total content is 3% or more. The total content of the compound represented by the general formula (ii) is 3% or more with respect to the total amount of the composition. The compound is represented by the general formula (i) and the general formula (ii). The total amount of the compound and the compound represented by the general formula (L), and the total content of the compound represented by the general formula (i) is 20% or more; ( ^Wherein 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, and R ^Nd11 , R ^Nd12 , R ^N11 , and R ^N12 , R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent -CH ₂ -groups can be independently -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, but n ^N11 + n ^N12 represents 1, 2 or 3, n ^L1 represents 0, 1, 2 or 3, A ^N11 , A ^N12 , A ^L1 , A ^L2, and A ^L3 each independently represents a member selected from the group consisting of (a) 1, 4- Cyclohexyl (1 -CH ₂ -present in this group or 2 or more -CH ₂ -which are not adjacent may be substituted with -O-) and (b) 1,4-phenylene (present in this group 1 -CH = or 2 or more of the non-adjacent -CH = can be replaced by -N =) (c) naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2 1,6-diyl or decalin-2,6-diyl (naphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl- CH = or two or more non-adjacent -CH = groups which may be replaced with -N =), the above-mentioned groups (a), (b) and (c) may be independently It is substituted by a cyano group, a fluorine atom, or a chlorine atom, and Z ^N11 , Z ^N12 , Z ^L1, and Z ^L2 each independently represent a single bond, -CH ₂ CH ₂ -,-(CH ₂ ) _4- , -OCH ₂ -,- CH ₂ O-, -COO-, -OCO-, -OCF _2- , -CF ₂ O-, -CH = NN = CH-, -CH = CH-, -CF = CF-, or -C≡C-, When A ^N11 , A ^N12 , A ^L1 , A ^L2 and / or A ^L3 are plural, they may be the same or different. When Z ^N11 , Z ^N12 , Z ^L1 and / or Z ^L2 are plural, they And the like may be the same or different, except that the compound represented by the general formula (N-1) does not include the compound represented by the general formula (N-1d), and the compound represented by the general formula (L) does not include the general formula (i), A compound represented by the general formula (ii), the general formula (N-1d), and the general formula (N-1)).     The liquid crystal composition having a negative dielectric constant anisotropy according to claim 1, further comprising a polymerizable compound.         A liquid crystal display element using the composition as claimed in claim 1 or 2.         A VA-type liquid crystal display element using a liquid crystal composition as claimed in claim 1 or 2.