TWI859148B - Liquid crystal composition - Google Patents

Abstract

The subject of the present invention is to provide a polymerizable liquid crystal composition, which has a negative dielectric anisotropy, satisfies the wide temperature range display, low voltage drive, high speed response, and high VHR required by ordinary liquid crystal compositions, and has no or very little display failure when made into a liquid crystal display element. The present invention relates to a liquid crystal composition, which contains one or more compounds represented by the general formula (N-1), and one or more polymerizable compounds, containing a compound in which n ^N11 is an integer of 1 to 3 and at least one Z ^N11 is -CH ₂ O- as the compound represented by the general formula (N-1); the liquid crystal composition has a nematic-isotropic liquid phase transition temperature of 100°C or more and a negative dielectric anisotropy (Δε).

Description

Liquid crystal composition

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

PSA (Polymer Sustained Alignment) type liquid crystal display devices have a structure in which a polymer structure is formed in the cell in order to control the pre-tilt angle of the liquid crystal molecules. Due to its high-speed response and high contrast, it continues to be developed as a liquid crystal display element (Patent Document 1).

The requirements for PSA liquid crystal compositions used in PID (Public Information Display) and the like, which are assumed to be used outdoors, must have a high nematic-isotropic liquid phase transition temperature (T _NI ), a low solid-nematic phase transition temperature (T _CN ), and excellent low temperature storage stability (Low Temperature Storage test). Furthermore, they must have a low driving voltage, a large elastic constant (K ₃₃ ), and a sufficiently small rotational viscosity (γ ₁ ). [Prior Art Literature] [Patent Literature]

Patent document 1: WO2016/017569

[The problem that the invention wants to solve]

The subject of the present invention is to provide a polymerizable liquid crystal composition, whose dielectric anisotropy (Δε) is negative, and satisfies the requirements of a conventional liquid crystal composition for display in a wide temperature range, low voltage drive, high speed response, and high VHR, and when a liquid crystal display element is manufactured, there is no display defect or very little display defect; the present invention provides a liquid crystal display element using the liquid crystal composition. [Means for solving the subject]

The present invention provides a liquid crystal composition, which contains one or more compounds selected from the compounds represented by the general formula (N-1), and one or more polymerizable compounds, wherein ^nN11 is an integer of 1 to 3 and at least one ^ZN11 is _-CH2O- as the compound represented by the general formula (N-1); the liquid crystal composition has a nematic-isotropic liquid phase transition temperature ( _TNI ) of 100°C or more and a negative dielectric anisotropy (Δε); the present invention also provides a liquid crystal display element using the liquid crystal composition.

(In the formula, R ^N11 and R ^N12 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may each independently be substituted by -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-, A ^N11 and A ^N12 each independently represent a group selected from the group consisting of the following groups (a) to (c), (a) 1,4-cyclohexylene (one -CH ₂ - or two or more non-adjacent -CH ₂ - in the group may be substituted by -O-), (b) 1,4-phenylene (one -CH= or two or more non-adjacent -CH= in the group may be substituted by -N=), and (c) 1,4-cyclohexenylene, The above _- mentioned group (a), group (b), and group (c) may be independently substituted by a cyano group, a fluorine atom, or a chlorine atom, respectively; ^ZN11 and ^ZN12 independently represent a single bond, _-CH2CH2- , -( _CH2 ) _4- , -OCH2-, _-CH2O- , _-COO- , -OCO-, _-OCF2- , _-CF2O- , -CH=N-N=CH-, -CH=CH-, -CF=CF-, or -C≡C-; ^nN11 and ^nN12 independently represent an integer from 0 to 3, respectively; ^nN11 + ^nN12 is 1, 2, or 3; when there are a plurality of ^AN11 ~ ^AN12 , ^ZN11 ~ ^ZN12 , they may be the same or different.)

The polymerizable liquid crystal of the present application is particularly useful as a liquid crystal display element driven by an active matrix. [Effect of the invention]

By using the polymerizable liquid crystal composition of the present invention, a liquid crystal display element can be obtained that can display in a wide temperature range due to excellent low-temperature storage stability, and has low driving voltage, fast response speed and high VHR, and can provide a liquid crystal display element that can fully cope with outdoor use.

The liquid crystal composition of the present invention has negative dielectric anisotropy, a nematic phase-isotropic liquid transition temperature of above 100°C, and contains one or more compounds selected from the group of compounds represented by the following general formula (N-1).

The compound represented by the general formula (N-1) is equivalent to a compound with negative dielectric properties (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 having a negative Δε and an absolute value greater than 3.

In the general formula (N-1), ^RN11 and ^RN12 are preferably independently an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms, preferably an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms, more preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, more preferably an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms, and particularly preferably an alkenyl group having 3 carbon atoms (propenyl).

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

The alkenyl group is preferably 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 it is necessary to increase Δn, ^AN11 and ^AN12 are preferably independently aromatic, and preferably aliphatic in order to improve the response speed. They are preferably trans-1,4-cyclohexylene, 1,4-phenylene, 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]octylene, piperidine-1,4-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, and more preferably represent the following structure,

.

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

Z ^N11 and Z ^N12 preferably independently 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, and particularly preferably -CH ₂ O- or a single bond.

Among them, in the present invention, a compound in which n ^N11 is an integer of 1 to 3 and at least one Z ^N11 is -CH ₂ O- (hereinafter, also referred to as "compound (N-10)") must be contained. That is, in the present invention, in the general formula (N-1), the compound (N-10) having at least one -CH ₂ O- bonding group is an essential component. By containing this compound, a liquid crystal composition showing excellent low-temperature storage stability can be obtained, and by using this liquid crystal composition, a liquid crystal display element showing low driving voltage, fast response speed and high VHR can be obtained. Compound (N-10) is represented by the following general formula (N-10).

(In the formula, ^RN11 , ^RN12 , ^AN11 , ^AN12 , ^ZN11 and ^ZN12 have the same meanings as the symbols in the above formula (N-1), ^nN110 , ^nN111 and ^nN120 each independently represent an integer from 0 to 2, ^nN110 + ^nN111 is 0, 1 or 2, ^nN110 + ^nN111 + ^nN120 is 0, 1 or 2, and when there are multiple ^AN11s and ^ZN11s , they may be the same or different.) The composition of the present invention contains compound (N-10) as the compound represented by formula (N-1), and preferably further contains a compound represented by formula (N-1) other than compound (N-10).

In the compound represented by the formula (N-1) other than the compound (N-10), n ^N11 +n ^N12 is preferably 1 or 2, and preferably a combination of n ^N11 being 1 and n ^N12 being 0, a combination of n ^N11 being 2 and n ^N12 being 0, a combination of n ^N11 being 1 and n ^N12 being 1, or a combination of n ^N11 being 2 and n ^N12 being 1.

In this application, % means mass % unless otherwise specified.

The preferred lower limit of the content of compound (N-10) relative 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 preferred upper limit of the content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20%.

The preferred lower limit of the content of the compound represented by formula (N-1) relative 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 preferred upper limit of the 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 with a fast response speed is required, it is preferred that the above lower limit value is low and the upper limit value is low. Furthermore, when the T _NI of the composition of the present invention is kept high and a composition with good temperature stability is required, it is preferred that the above lower limit value is low and the upper limit value is low. In addition, in order to keep the driving voltage low and increase the dielectric anisotropy, it is preferred that the above lower limit value is high and the upper limit value is high.

As the compound (N-10), compounds represented by the following general formulae (N-10a) to (N-10b) can be exemplified as preferred ones.

(In the formula, ^RN11 and ^RN12 have the same meanings as ^RN11 and ^RN12 in the general formula (N-1), ^nNa110 represents 1 or 2, and ^nNa120 represents 1 or 2) More specifically, the compound represented by the general formula (N-10) is preferably a compound selected from the group of compounds represented by the general formulae (N-1-10) to (N-1-11) and (N-1-20) to (N-1-21) described below.

Furthermore, examples of the compound represented by the general formula (N-1) include the group of compounds represented by the following general formulae (N-1a) to (N-1c), (N-1e), and (N-1g).

(wherein, ^RN11 and ^RN12 have the same meanings as ^RN11 and ^RN12 in the general formula (N-1), ^nNa11 represents 0 or 1, ^nNb11 represents 1 or 2, ^nNc11 represents 0 or 1, nNe11 represents 1 or 2, ^nNg11 represents 1 or 2, ^ANe11 represents trans- ^{1,4-cyclohexylene or 1,4-phenylene, ANg11 represents} trans-1,4-cyclohexylene, 1,4-cyclohexenylene or 1,4-phenylene, but at least one of them represents 1,4-cyclohexenylene, ^ZNe11 represents a single bond or ethylene, but at least one of them present in the molecule represents ethylene, and a plurality of ^ANe11 , ^ZNe11 , and/or ^ANg11 present in the molecule may be the same or different) More specifically, the compound represented by general formula (N-1) is preferably a compound selected from the group of compounds represented by general formulas (N-1-1) to (N-1-21). Furthermore, the group of compounds represented by general formulas (N-1-10) to (N-1-11) and (N-1-20) to (N-1-21) is a compound equivalent to compound (N-10).

The compounds represented by the general formula (N-1-1) are the following compounds.

(wherein, R ^N111 and R ^N112 independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N-1)) R ^N111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably a propyl group, a pentyl group or a vinyl group. 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, preferably an ethoxy group or a butoxy group.

The compound represented by the general formula (N-1-1) can be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they can be used in combination appropriately according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is lower. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

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

Furthermore, the compound represented by the general formula (N-1-1) is preferably a compound selected from the group of compounds represented by formula (N-1-1.1) to formula (N-1-1.22), preferably a compound represented by formula (N-1-1.1) to (N-1-1.4), and preferably a compound represented by formula (N-1-1.1) and formula (N-1-1.3).

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

The compounds represented by the general formula (N-1-2) are the following compounds.

(wherein, ^RN121 and ^RN122 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N-1)) ^RN121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group, a butyl group or a pentyl group. ^RN122 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, preferably a methyl group, a propyl group, a methoxy group, an ethoxy group or a propoxy group.

The compound represented by the general formula (N-1-2) can be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they can be used in combination appropriately according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is lower. When the _TNI is emphasized, the effect is higher when the content is higher. Furthermore, when improving the dripping mark and afterimage characteristics, it is better to set the content range to the middle.

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

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

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

The compounds represented by the general formula (N-1-3) are the following compounds.

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

The compound represented by the general formula (N-1-3) may be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately used in combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is higher. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

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

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

The compounds represented by formula (N-1-3.1) to formula (N-1-3.4), formula (N-1-3.6) and formula (N-1-3.21) can be used alone or in combination, preferably a combination of formula (N-1-3.1) and formula (N-1-3.2), or a combination of two or three selected from formula (N-1-3.3), formula (N-1-3.4) and formula (N-1-3.6). The lower limits of the preferred contents of the compounds alone or in combination are 5%, 10%, 13%, 15%, 17% and 20% relative to the total amount of the composition of the present invention. Preferred upper limits of the content are 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, and 13% relative to the total amount of the composition of the present invention.

The compounds represented by the general formula (N-1-4) are the following compounds.

(wherein, R ^N141 and R ^N142 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N-1)) R ^N141 and R ^N142 each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, preferably a methyl group, a propyl group, an ethoxy group or a butoxy group.

The compound represented by the general formula (N-1-4) may be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately used in combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is lower. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

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

Furthermore, the compound represented by the general formula (N-1-4) is preferably a compound selected from the group of compounds represented by formula (N-1-4.1) to formula (N-1-4.14), preferably a compound represented by formula (N-1-4.1) to (N-1-4.4), and preferably a compound represented by formula (N-1-4.1), formula (N-1-4.2) and formula (N-1-4.4).

The compounds represented by formula (N-1-4.1) to (N-1-4.14) can be used alone or in combination. The preferred lower limits of the content of the compounds alone or in combination are 3%, 5%, 7%, 10%, 13%, 15%, 17%, and 20% relative to the total amount of the composition of the present invention. The preferred upper limits of the content are 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 11%, 10%, and 8% relative to the total amount of the composition of the present invention.

The compounds represented by the general formula (N-1-5) are the following compounds.

(wherein, ^RN151 and ^RN152 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N-1)) ^RN151 and ^RN152 independently represent preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-5) may be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately used in combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is lower. When the _TNI is emphasized, the effect is higher when the content is higher. Furthermore, when improving the dripping mark and afterimage characteristics, it is better to set the content range to the middle.

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

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

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

The compounds represented by the general formula (N-1-10) are the following compounds.

(wherein, ^RN1101 and ^RN1102 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N-1)) ^RN1101 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group, a butyl group, a vinyl group or a 1-propenyl group. ^RN1102 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, 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 in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately used in combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is lower. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

The preferred lower limit of the content of the compound represented by formula (N-1-10) relative to the total amount of the composition of the present invention is 1%, 2%, 5%, 10%, 13%, 15%, 17%, 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% relative to the total amount of the composition of the present invention.

Furthermore, the compound represented by the general formula (N-1-10) is preferably a compound selected from the group of compounds represented by formula (N-1-10.1) to formula (N-1-10.14), preferably a compound represented by formula (N-1-10.1) to (N-1-10.5), and preferably a compound represented by formula (N-1-10.1) and formula (N-1-10.2).

The compounds represented by formula (N-1-10.1) and formula (N-1-10.2) can be used alone or in combination. The preferred lower limits of the content of the compounds alone or in combination are 2%, 5%, 10%, 13%, 15%, 17%, and 20% relative to the total amount of the composition of the present invention. The preferred upper limits of the content are 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, and 8% relative to the total amount of the composition of the present invention.

The compounds represented by the general formula (N-1-11) are the following compounds.

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

The compound represented by the general formula (N-1-11) can be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they can be used in combination appropriately according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is lower. When the _TNI is emphasized, the effect is higher when the content is higher. Furthermore, when improving the dripping mark and afterimage characteristics, it is better to set the content range to the middle.

The preferred lower limit of the content of the compound represented by formula (N-1-11) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, 20%, 25%, 30%. The preferred upper limit of the content is 50%, 45%, 40%, 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% relative to the total amount of the composition of the present invention.

Furthermore, the compound represented by the general formula (N-1-11) is preferably a compound selected from the group of compounds represented by formula (N-1-11.1) to formula (N-1-11.14), preferably a compound represented by formula (N-1-11.1) to (N-1-11.14), and preferably a compound represented by formula (N-1-11.2) and formula (N-1-11.4).

The compounds represented by formula (N-1-11.2) and formula (N-1-11.4) can be used alone or in combination. The preferred lower limits of the content of the compounds alone or in combination are 5%, 10%, 13%, 15%, 17%, 20%, 25%, and 30% relative to the total amount of the composition of the present invention. The preferred upper limits of the content are 50%, 45%, 40%, 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, and 13% relative to the total amount of the composition of the present invention.

The compounds represented by the general formula (N-1-12) are the following compounds.

(wherein, ^RN1121 and ^RN1122 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N-1)) ^RN1121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. ^RN1122 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, 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 in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately used in combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is lower. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

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

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

(wherein, R ^N1131 and R ^N1132 independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N-1)) R ^N1131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. R ^N1132 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, 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 in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately used in combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is higher. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

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

The compounds represented by the general formula (N-1-14) are the following compounds.

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

The compound represented by the general formula (N-1-14) may be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately combined for use according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is lower. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

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

The compounds represented by the general formula (N-1-15) are the following compounds.

(wherein, R ^N1151 and R ^N1152 independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N-1)) R ^N1151 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. R ^N1152 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-15) can be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they can be used in combination appropriately according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is higher. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

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

The compounds represented by the general formula (N-1-16) are the following compounds.

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

The compound represented by the general formula (N-1-16) may be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately used in combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is higher. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

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

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

(wherein, R ^N1171 and R ^N1172 independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N-1)) R ^N1171 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. R ^N1172 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group, a propoxy group or a butoxy group.

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

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is higher. Furthermore, when improving the dripping mark and afterimage characteristics, it is better to set the content range to the middle.

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

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

(wherein, R ^N1181 and R ^N1182 independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N-1)) R ^N1181 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group. R ^N1182 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, 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 in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately used in combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is higher. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

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

Furthermore, the compound represented by the general formula (N-1-18) is preferably a compound selected from the group of compounds represented by formula (N-1-18.1) to formula (N-1-18.5), preferably a compound represented by formula (N-1-18.1) to (N-1-18.3), and preferably a compound represented by formula (N-1-18.2) and formula (N-1-18.3).

The compounds represented by the general formula (N-1-20) are the following compounds.

(wherein, ^RN1201 and ^RN1202 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N-1)) ^RN1201 and ^RN1202 are preferably independently an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, 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 in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately used in combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is higher. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

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

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

(wherein, ^RN1211 and ^RN1212 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N-1)) ^RN1211 and ^RN1212 independently represent preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-21) can be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they can be used in combination appropriately according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is higher. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

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

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

(wherein, ^RN1221 and ^RN1222 each independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N-1)) ^RN1221 and ^RN1222 each independently represent an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-22) can be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they can be used in combination appropriately according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the improvement of Δε is emphasized, it is better to set the content higher. When the solubility at low temperature is emphasized, the effect is higher when the content is higher. When the _TNI is emphasized, the effect is higher when the content is higher. Furthermore, when improving the drip mark and afterimage characteristics, it is better to set the content range to the middle.

The preferred lower limit of the content of the compound represented by formula (N-1-22) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, 13%, 15%, 17%, 20%. The preferred upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 5% relative to the total amount of the composition of the present invention.

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

The liquid crystal composition of the present invention preferably further contains one or more compounds represented by the general formula (L). The compound represented by the general formula (L) is equivalent to a compound having a dielectric property that is almost neutral (the value of Δε is -2 to 2). Therefore, the number of polar groups such as halogens in the molecule is preferably set to 2 or less, preferably set to 1 or less, and preferably does not contain polar groups such as halogens.

(In the formula, ^RL1 and ^RL2 each independently represent an alkyl group having 1 to 8 carbon atoms, one or two or more non-adjacent _-CH2- in the alkyl group may each independently be substituted by -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-, ^nL1 represents 0, 1, 2 or 3, ^AL1 , ^AL2 and ^AL3 each independently represent a group selected from the group consisting of the following groups (a) to (c), (a) 1,4-cyclohexyl (one _-CH2- or two or more non-adjacent _-CH2- in the group may each be substituted by -O-) (b) 1,4-phenylene (one -CH= or two or more non-adjacent -CH= in the group may be substituted by -N=) and (c) naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (one -CH= or two or more non-adjacent -CH= in naphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl may be substituted by -N=) The above group (a), group (b) and group (c) may be independently substituted by a cyano group, a fluorine atom or a chlorine atom, and Z ^L1 and Z ^L2 independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -OCF ₂ -, _-CF2O- , -CH=N-N=CH-, -CH=CH-, -CF=CF- or -C≡C-, when ^nL1 is 2 or 3 and there are plural A ^L2s , they may be the same or different, when ^nL1 is 2 or 3 and there are plural Z ^L3s , they may be the same or different, but do not include compounds represented by (N-1), (N-2) and (N-3)) The compounds represented by the general formula (L) may be used alone or in combination. The types of compounds that can be combined are not particularly limited, and they may be used in combination as appropriate according to desired properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. For example, the type of compound used is one in one embodiment of the present invention. Or in other embodiments of the present invention, there are 2, 3, 4, 5, 6, 7, 8, 9, 10 or more kinds.

In the composition of the present invention, the content of the compound represented by the general formula (L) must be appropriately adjusted according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, drop marks, afterimages, dielectric anisotropy, etc.

The preferred lower limit of the content of the compound represented by formula (L) relative 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 preferred upper limit of the 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 lower limit value is high and the upper limit value is high. Furthermore, when the T _NI of the composition of the present invention is kept high and a composition with good temperature stability is required, it is preferred that the above lower limit value is high and the upper limit value is high. In addition, when the dielectric anisotropy is to be increased in order to keep the driving voltage low, it is preferred that the above lower limit value is low and the upper limit value is low.

When reliability is important, it is preferred that both ^RL1 and ^RL2 are alkyl groups. When reducing the volatility of the compound is important, they are preferably alkoxy groups. When reducing viscosity is important, it is preferred that at least one of them is alkenyl.

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

Regarding ^RL1 and ^RL2 , when the ring structure to which they are bonded is a phenyl (aromatic), they are preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and alkenyl groups having 4 to 5 carbon atoms. When the ring structure to which they are bonded is a saturated ring structure such as cyclohexane, pyran, and dioxane, they are preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and alkenyl groups having 2 to 5 carbon atoms. In order to stabilize the nematic phase, the total number of carbon atoms and oxygen atoms, when present, is preferably 5 or less, and a linear structure is preferred.

The alkenyl group is preferably 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)

Regarding n ^L1 , when emphasis is placed on the response speed, 0 is preferred, 2 or 3 is preferred to improve the upper limit temperature of the nematic phase, and 1 is preferred to achieve a balance therebetween. In order to satisfy the characteristics required as a composition, it is preferred to combine compounds having different values.

Regarding A ^L1 , A ^L2 and A ^L3 , when increasing Δn is required, they are preferably aromatic, and are preferably aliphatic in order to improve the response speed. They are preferably independently trans-1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 1,4-cyclohexenyl, 1,4-bicyclo[2.2.2]octylene, piperidine-1,4-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, and more preferably represent the following structure,

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

Regarding Z ^L1 and Z ^L2 , when response speed is important, a single button is preferred.

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

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

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

(wherein, ^RL11 and ^RL12 independently represent the same meanings as ^RL1 and ^RL2 in the general formula (L)) ^RL11 and ^RL12 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms.

The compound represented by the general formula (L-1) may be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately combined for use according to the required performance such as solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

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

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 lower limit value is high and the upper limit value is high. Furthermore, when the T _NI of the composition of the present invention is kept high and a composition with good temperature stability is required, it is preferred that the above lower limit value is in the middle and the upper limit value is in the middle. In addition, when the dielectric anisotropy is to be increased in order to keep the driving voltage low, it is preferred that the above lower limit value is low and the upper limit value is low.

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

(In the formula, ^RL12 has the same meaning as in the general formula (L-1)) The compound represented by the general formula (L-1-1) is preferably a compound selected from the group of compounds represented by formulas (L-1-1.1) to (L-1-1.3), preferably a compound represented by formula (L-1-1.2) or (L-1-1.3), and particularly preferably a compound represented by formula (L-1-1.3).

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

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

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

Furthermore, the compound represented by the general formula (L-1-2) is preferably a compound selected from the group of compounds represented by the formula (L-1-2.1) to the formula (L-1-2.4), and preferably a compound represented by the formula (L-1-2.2) to the formula (L-1-2.4). In particular, the compound represented by the formula (L-1-2.2) is preferred because it particularly improves the response speed of the composition of the present invention. In addition, when a high _TNI is required rather than a response speed, it is preferred to use a compound represented by the formula (L-1-2.3) or the formula (L-1-2.4). In order to improve the solubility at low temperature, it is not preferable to set the content of the compounds represented by the formula (L-1-2.3) and the formula (L-1-2.4) to 30% or more.

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

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

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

(wherein, ^RL13 and ^RL14 independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms) ^RL13 and ^RL14 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms.

The preferred lower limit of the content of the compound represented by formula (L-1-3) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 30%. The preferred upper limit of the content is 60%, 55%, 50%, 45%, 40%, 37%, 35%, 33%, 30%, 27%, 25%, 23%, 20%, 17%, 15%, 13%, 10% relative to the total amount of the composition of the present invention. Furthermore, the compound represented by the general formula (L-1-3) is preferably a compound selected from the group of compounds represented by formula (L-1-3.1) to formula (L-1-3.13), and preferably a compound represented by formula (L-1-3.1), formula (L-1-3.3) or formula (L-1-3.4). In particular, the compound represented by formula (L-1-3.1) is preferred because it particularly improves the response speed of the composition of the present invention. In addition, when a higher _TNI is required rather than a response speed, it is preferred to use compounds represented by formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11) and formula (L-1-3.12). In order to improve the solubility at low temperature, it is not preferable to set the total content of the compounds represented by Formula (L-1-3.3), Formula (L-1-3.4), Formula (L-1-3.11) and Formula (L-1-3.13) to 20% or more.

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

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

(wherein, ^RL15 and ^RL16 independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms) ^RL15 and ^RL16 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms.

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

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

Furthermore, the compounds represented by general formula (L-1-4) and (L-1-5) are preferably selected from the group of compounds represented by formula (L-1-4.1) to formula (L-1-5.3), and are preferably compounds represented by formula (L-1-4.2) or formula (L-1-5.2).

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

Preferably, two or more compounds selected from the group consisting of compounds represented by 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), formula (L-1-3.11) and formula (L-1-3.12) are combined. More preferably, a compound selected from the group consisting of compounds represented by formula (L-1-1.3), formula (L-1-2.2), formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4) and formula (L-1-4.2) is combined. The preferred lower limit 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, and the upper limit is 80%, 70%, 60%, 50%, 45%, 40%, 37%, 35%, 33%, 30%, 28%, 25%, 23%, 20% relative to the total amount of the composition of the present invention. When the reliability of the composition is important, it is preferred to combine two or more compounds selected from the compounds represented by formula (L-1-3.1), formula (L-1-3.3) and formula (L-1-3.4). When the response speed of the composition is important, it is preferred to combine 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 general formula (L-1) is preferably a compound selected from the group of compounds represented by general formula (L-1-6).

(wherein, ^RL17 and ^RL18 independently represent a methyl group or a hydrogen atom) The preferred lower limit of the content of the compound represented by formula (L-1-6) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 35%. The preferred upper limit of the content is 60%, 55%, 50%, 45%, 42%, 40%, 38%, 35%, 33%, 30% relative to the total amount of the composition of the present invention.

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

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

(wherein, ^RL21 and ^RL22 independently represent the same meanings as ^RL1 and ^RL2 in the general formula (L)) ^RL21 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and ^RL22 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.

The compound represented by the general formula (L-2) may be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately combined for use according to the required performance such as solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

When the solubility at low temperature is important, the effect is high when the content is set higher. On the contrary, when the response speed is important, the effect is high when the content is set lower. Furthermore, when improving the dripping mark and afterimage characteristics, it is better to set the content range to the middle.

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

Furthermore, the compound represented by general formula (L-2) is preferably a compound selected from the group of compounds represented by formula (L-2.1) to formula (L-2.6), and preferably a compound represented by formula (L-2.1), 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.

(wherein, ^RL31 and ^RL32 independently represent the same meanings as ^RL1 and ^RL2 in the general formula (L)) ^RL31 and ^RL32 are preferably independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

The compound represented by the general formula (L-3) may be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately used in combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

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

When a high birefringence index is to be obtained, the effect is high when the content is set higher. On the contrary, when a high _TNI is emphasized, the effect is high when the content is set lower. Furthermore, when the drop mark and afterimage characteristics are to be improved, it is preferable to set the content range to the middle.

Furthermore, the compound represented by the general formula (L-3) is preferably a compound selected from the group consisting of compounds represented by formula (L-3.1) to formula (L-3.7), and is preferably a compound represented by formula (L-3.2) to formula (L-3.5).

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

(wherein, ^RL41 and ^RL42 independently represent the same meanings as ^RL1 and ^RL2 in the general formula (L)) ^RL41 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and ^RL42 is 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-4) may be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately used in combination according to the required performance such as solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. The types of compounds used, for example, in one embodiment of the present invention are 1, 2, 3, 4, 5 or more.

In the composition of the present invention, the content of the compound represented by the general formula (L-4) must be appropriately adjusted according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, drop marks, afterimages, dielectric anisotropy, etc.

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

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

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

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

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

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

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

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

The compound represented by the general formula (L-4) is preferably a compound represented by the formula (L-4.7) to the formula (L-4.10), and is particularly preferably a compound represented by the formula (L-4.9).

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

(wherein, ^RL51 and ^RL52 independently represent the same meanings as ^RL1 and ^RL2 in the general formula (L)) ^RL51 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and ^RL52 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.

The compound represented by the general formula (L-5) may be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately used in combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, 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 appropriately adjusted according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, drop marks, afterimages, dielectric anisotropy, etc.

The preferred lower limit of the content of the compound represented by formula (L-5) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40%. The preferred upper limit of the content of the compound represented by formula (L-5) relative to the total amount of the composition of the present invention 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 formula (L-5.2), and is particularly preferably a compound represented by formula (L-5.1).

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

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

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

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

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

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

(wherein, ^RL61 and ^RL62 each independently represent the same meanings as ^RL1 and ^RL2 in the general formula (L), and ^XL61 and ^XL62 each independently represent a hydrogen atom or a fluorine atom) ^RL61 and ^RL62 each independently represent an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and it is preferred that one of ^XL61 and ^XL62 is a fluorine atom and the other is a hydrogen atom.

The compound represented by the general formula (L-6) may be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they are appropriately combined for use according to the required performance such as solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, four, five or more in one embodiment of the present invention.

The preferred lower limit of the content of the compound represented by formula (L-6) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40%. The preferred upper limit of the content of the compound represented by formula (L-6) relative to the total amount of the composition of the present invention is 50%, 40%, 35%, 30%, 20%, 15%, 10%, 5%. When the emphasis is placed on increasing Δn, it is preferred to increase the content, and when the emphasis is placed on precipitation at low temperatures, it is preferred to reduce the content.

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

The types of compounds that can be combined are not particularly limited, but preferably contain 1 to 3 of these compounds, and more preferably contain 1 to 4 of them. In addition, a wide distribution of molecular weights of the selected compounds is also effective for solubility, so for example, it is preferred to select one compound represented by formula (L-6.1) or (L-6.2), one compound represented by formula (L-6.4) or (L-6.5), one compound represented by formula (L-6.6) or (L-6.7), and one compound represented by formula (L-6.8) or (L-6.9), and appropriately combine them. Among them, preferred are compounds represented by formula (L-6.1), formula (L-6.3), formula (L-6.4), formula (L-6.6) and formula (L-6.9).

Furthermore, the compound represented by the general formula (L-6) is preferably a compound represented by the formula (L-6.10) to the formula (L-6.17), among which the compound represented by the formula (L-6.11) is preferred.

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

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

(wherein, ^RL71 and ^RL72 are independently the same as ^RL1 and ^RL2 in the general formula (L), ^AL71 and ^AL72 are independently the same as ^AL2 and ^AL3 in the general formula (L), the hydrogen atoms in ^AL71 and ^AL72 may be independently substituted by fluorine atoms, ^ZL71 is the same as ^ZL2 in the general formula (L), ^XL71 and ^XL72 are independently fluorine atoms or hydrogen atoms) Wherein, ^RL71 and ^RL72 are preferably independently alkyl groups having 1 to 5 carbon atoms, alkenyl groups having 2 to 5 carbon atoms or alkoxy groups having 1 to 4 carbon atoms, ^AL71 and ^AL72 are preferably independently 1,4-cyclohexylene or 1,4-phenylene, ^AL71 and AL72 are preferably independently 1,4-cyclohexylene or 1,4-phenylene. The hydrogen atoms on ^L72 may be independently substituted by fluorine atoms. Z ^L71 is preferably a single bond or -COO-, preferably a single bond. ^XL71 and ^XL72 are preferably hydrogen atoms.

The types of compounds that can be combined are not particularly limited, and are determined based on the required performance combination such as solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, one, two, three, or four 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 appropriately adjusted according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, drop marks, afterimages, dielectric anisotropy, etc.

The preferred lower limit of the content of the compound represented by formula (L-7) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 14%, 16%, 20%. The preferred upper limit of the 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 the composition of the present invention is desired to be in an embodiment with a high _TNI , it is preferred to increase the content of the compound represented by formula (L-7). When a low viscosity embodiment is desired, it is preferred to reduce the content.

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

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

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

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

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

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

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

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

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

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, even more preferably 1% or less, and most preferably substantially free of the compound, based on the total mass of the composition.

When emphasis is placed on stability due to UV irradiation, the content of the chlorine atom-substituted compound is preferably set to 15% or less, more preferably 10% or less, more preferably 8% or less, more preferably 5% or less, more preferably 3% or less, and more preferably substantially free of the chlorine atom-substituted compound, relative to the total mass of the composition.

It is preferred to increase the content of compounds whose ring structures within the molecule are all 6-membered rings. It is preferred to set the content of compounds whose ring structures within the molecule are all 6-membered rings to 80% or more relative to the total mass of the above-mentioned composition, more preferably to set it to 90% or more, and more preferably to set it to 95% or more. The best is that the composition is substantially composed of compounds whose ring structures within the molecule are all 6-membered rings.

In order to inhibit the deterioration caused by oxidation of the composition, it is preferred to reduce the content of the compound having a cyclohexenyl group as a ring structure, preferably to set the content of the compound having a cyclohexenyl group to 10% or less, preferably to 8% or less, more preferably to 5% or less, more preferably to 3% or less, and more preferably to contain substantially no cyclohexenyl group, relative to the total mass of the above-mentioned composition.

When the improvement of viscosity and _TNI is emphasized, it is preferred to reduce the content of the compound having a 2-methylbenzene-1,4-diyl group in the molecule which may be substituted with a halogen and preferably to set the content of the compound having the above-mentioned 2-methylbenzene-1,4-diyl group in the molecule to 10% or less, preferably to 8% or less, more preferably to 5% or less, more preferably to 3% or less, and more preferably to contain substantially no 2-methylbenzene-1,4-diyl group in the molecule relative to the total mass of the above-mentioned composition.

The term "substantially free" in this application means that the substance does not contain any substance other than substances that are not intentionally contained.

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

The average elastic constant (K _AVG ) of the liquid crystal composition used in the present invention is preferably 10 to 25, and as the lower limit, it is preferably 10, preferably 10.5, preferably 11, preferably 11.5, preferably 12, preferably 12.3, preferably 12.5, preferably 12.8, preferably 13, preferably 13.3, preferably 13.5, preferably 13.8, preferably 14, preferably 15. 14.3 is better, 14.5 is better, 14.8 is better, 15 is better, 15.3 is better, 15.5 is better, 15.8 is better, 16 is better, 16.3 is better, 16.5 is better, 16.8 is better, 17 is better, 17.3 is better, 17.5 is better, 17.8 is better, The best value is 18, and as the upper limit value, the best value is 25, the best value is 24.5, the best value is 24, the best value is 23.5, the best value is 23, the best value is 22.8, the best value is 22.5, the best value is 22.3, the best value is 22, the best value is 21.8, the best value is 21.5, the best value is 21.3, the best value is 21, and the best value is 20.8 , 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, preferably 18.3, preferably 18, preferably 17.8, preferably 17.5, preferably 17.3, preferably 17. When reducing power consumption is important, suppressing the amount of backlight is effective, and the liquid crystal display element preferably increases the light transmittance, so it is better to set the value of K _AVG to a lower value. When improving the response speed is important, it is better to set the value of K _AVG to a higher value.

The composition of the present invention may further contain a polymerizable compound (hereinafter, sometimes referred to as a "polymerizable monomer"). The polymerizable compound is preferably a compound represented by the following general formula (P). It is also preferred to contain one or more polymerizable monomers.

(In the above general formula (P), R ^p1 represents a hydrogen atom, a fluorine atom, a cyano group, a hydrogen atom, an alkyl group having 1 to 15 carbon atoms in which the hydrogen atom may be substituted by a halogen atom, an alkoxy group having 1 to 15 carbon atoms in which the hydrogen atom may be substituted by a halogen atom, an alkenyl group having 1 to 15 carbon atoms in which the hydrogen atom may be substituted by a halogen atom, an alkenyloxy group having 1 to 15 carbon atoms in which the hydrogen atom may be substituted by a halogen atom, or -Sp ^p2 -P ^p2 , P ^p1 and P ^p2 each independently represent any one of the general formulae (P ^p1 -1) to (P ^p1 -9),

(wherein, R ^p11 and R ^p12 each independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a halogenated alkyl group having 1 to 5 carbon atoms, W ^p11 represents a single bond, -O-, -COO- or a methylene group, t ^p11 represents 0, 1 or 2, and when a plurality of R ^p11 , R ^p12 , W ^p11 and/or t ^p11 exist in the molecule, they may be the same or different), Sp ^p1 and Sp ^p2 each independently represent a single bond or a spacer group, Z ^p1 and Z ^p2 each independently represent a single bond, -O-, -S-, -CH ₂ -, -OCH ₂ -, -CH ₂ O-, -CO-, -C ₂ H ₄ -, -COO-, -OCO-, -OCOOCH ₂ -, -CH ₂ OCOO-, -OCH ₂ CH ₂ O-, -CO-NR ^ZP1 -, -NR ^ZP1 -CO-, -SCH ₂ -, -CH ₂ S-, -CH=CR ^ZP1 -COO-, -CH=CR ^ZP1 -OCO-, -COO-CR ^{ZP1 =CH-, -OCO-CR ZP1 =} CH-COO-, -COO-CR ^ZP1 =CH-OCO-, -OCO -CR ^ZP1 =CH-COO-, -OCO-CR ^ZP1 =CH-OCO-, - (CH ₂ ) ₂ -COO-, - (CH ₂ ) 2 -OCO- _{, -OCO- (CH 2 ) 2} ^- _{, -} (C=O) -O- (CH ₂ ) ₂ -, -CH=CH-, -CF=CF-, -CF=CH-, -CH=CF-, -CF ₂ -, _{-CF2O- , -OCF2-} , _-CF2CH2- , _-CH2CF2- , -CF2CF2- or -C≡C- (wherein ^RZP1 independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. When a plurality of ^RZP1 _exist in the molecule, they may be the same or different), ^Ap2 represents _1,4 -phenylene, _1,4 -cyclohexylene, anthracene-2,6-diyl, phenanthrene-2,7-diyl, pyridine-2,5-diyl, pyrimidine-2,5-diyl, naphthalene-2,6-diyl, indane-2,5-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or 1,3-dioxane-2,5-diyl, A ^p2 is unsubstituted or may be substituted by an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a halogenated alkoxy group having 1 to 12 carbon atoms, a halogen atom, a cyano group, a nitro group, or -Sp ^p2 -P ^p2 , wherein when m ^p2 described later is 0 and m ^p1 described later is 2 or more, or when m ^p3 described later is 0 and m ^p4 described later is 2 or more, the above-mentioned A ^p2 further has a bond with m ^p1 or m ^p4 at any position of its individual group, A ^p1 represents a group represented by (A ^p1 -11) to (A ^p1 -19),

(wherein ★ is bonded to Sp ^p1 or Z ^p1 , ★★ is bonded to Z ^p1 , and one or more hydrogen atoms in the structure may be substituted by an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a halogenated alkoxy group having 1 to 12 carbon atoms, a halogen atom, a cyano group, a nitro group, or -Sp ^p2 -P ^p2 ), A ^p3 represents a group represented by (A ^p3 -11) to (A ^p3 -19),

(wherein ★ is bonded to Z ^p2 , ★★ is bonded to R ^p1 or Z ^p2 , one or more hydrogen atoms in the structure may be substituted by an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a halogenated alkoxy group having 1 to 12 carbon atoms, a halogen atom, a cyano group, a nitro group, or -Sp ^p2 -P ^p2 ), m ^p2 and m ^p3 independently represent 0, 1, 2 or 3, m ^p1 and m ^p4 independently represent 1, 2 or 3, and when there are multiple P ^p1 , Sp ^p1 , A ^p1 , Z ^p1 , Z ^p2 , A ^p3 and/or R ^p1 in the molecule, they may be the same or different)

In the general formula (P) of the present invention, R ^p1 is preferably -Sp ^p2 -P ^p2 .

It is preferred that P ^p1 and P ^p2 are independently any one of the formulas (P ^p1 -1) to (P ^p1 -3), and more preferably (P ^p1 -1).

Preferably, R ^p11 and R ^p12 are independently a hydrogen atom or a methyl group.

It is preferred that m ^p1 + m ^p4 is 2 or greater, more preferably 2 or 3.

^Zp1 and ^Zp2 are preferably independently _a single bond, _-OCH2- , _-CH2O- , -CO-, -C2H4-, -COO-, -OCO-, -COOC2H4-, -OCOC2H4-, -C2H4OCO-, -C2H4COO-, _-CH = _CH- , -CF2-, -CF2O-, -(CH2) ₂ -COO-, -( _CH2 ) _{2- OCO- , -OCO-} ( _{CH2 ) 2-} , -CH=CH- _{COO- , -COO} -CH ₌ CH-, -OCOCH=CH-, -COO-( _CH2 ) _2- , _-OCF2- or -C≡C-, preferably _a single _bond , _-OCH2 -, _{-CH2O- , -C2H4-} , _-COO- , -OCO-, -COOC2H4-, _-OCOC2H4- , -C2H4OCO-, _-C2H4COO- , -CH=CH- _{, -(CH2)2-, -COO-, -(CH2)2- , -OCO- , -OCO-(CH2)2- , -CH = CH - COO-} , -COO _- CH=CH-, -OCOCH=CH-, -COO-( _CH2 ) _{2- ,} or -C≡C-; preferably _, only one of _-OCH2- , -CH2O-, _{-C2H4- ,} -COO-, _-OCO- , _-COOC2H4- , _-OCOC2H4- , -C ₂ H ₄ OCO-, -C ₂ H ₄ COO-, -CH=CH-, -(CH ₂ ) ₂ -COO-, -(CH ₂ ) ₂ -OCO-, -OCO-(CH ₂ ) ₂ -, -CH=CH-COO-, -COO-CH=CH-, -OCOCH=CH-, -COO-(CH ₂ ) ₂ -, or -C≡C-, and all the others are single bonds. It is preferred that only one of the groups present in the molecule is -OCH ₂ -, -CH ₂ O-, -C ₂ H ₄ -, -COO- or -OCO-, and all the others are single bonds. It is more preferred that all are single bonds.

Furthermore, it is preferred that only one of ^Zp1 and ^Zp2 present in the molecule is a bonding group selected from the group consisting of -CH=CH-COO-, -COO-CH=CH-, -( _CH2 ) ₂ -COO-, -( _CH2 ) ₂ -OCO-, -O-CO-( _CH2 ) _2- , and -COO-( _CH2 ) _2- , and the others are single bonds.

Sp ^p1 and Sp ^p2 independently represent a single bond or an alkylene group having 1 to 30 carbon atoms. The -CH ₂ - in the alkylene group may be substituted by -O-, -CO-, -COO-, -OCO-, -CH=CH- or -C≡C- as long as the oxygen atoms are not directly bonded to each other. The hydrogen atom in the alkylene group may be substituted by a halogen atom. Preferably, the alkylene group is a straight chain group having 1 to 10 carbon atoms or a single bond.

A ^p2 is preferably 1,4-phenylene, 1,4-cyclohexylene, anthracene-2,6-diyl, phenanthrene-2,7-diyl, or naphthalene-2,6-diyl, preferably 1,4-phenylene, 1,4-cyclohexylene, phenanthrene-2,7-diyl, or naphthalene-2,6-diyl. When m ^p2 + m ^p3 is 0, phenanthrene-2,7-diyl is preferred. When m ^p2 + m ^p3 is 1, 2, or 3, 1,4-phenylene or 1,4-cyclohexylene is preferred. In order to improve the compatibility with the liquid crystal compound, one or more hydrogen atoms in the structure of A ^p2 may be substituted by methyl, ethyl, methoxy, ethoxy, or fluorine atoms.

A ^p1 is preferably a formula (A ^p1 -15), (A ^p1 -16), (A ^p1 -17) or (A ^p1 -18). In order to improve the compatibility with the liquid crystal compound, one or more hydrogen atoms in the structure of A ^p1 may be substituted by methyl, ethyl, methoxy, ethoxy or fluorine atoms.

A ^p3 is preferably a formula (A ^p1 -14), (A ^p1 -15), (A ^p1 -16), (A ^p1 -17) or (A ^p1 -18). In order to improve the compatibility with the liquid crystal compound, one or more hydrogen atoms in the structure of A ^p3 may be substituted by methyl, ethyl, methoxy, ethoxy or fluorine atoms.

m ^p2 +m ^p3 is preferably 0, 1, 2 or 3, more preferably 1 or 2.

The total content of the compounds represented by the general formula (P) is preferably 0.05-10%, preferably 0.1-8%, preferably 0.1-5%, preferably 0.1-3%, preferably 0.2-2%, preferably 0.2-1.3%, preferably 0.2-1%, and preferably 0.2-0.56%, relative to the composition containing the compounds represented by the general formula (P) of the present invention.

The preferred lower limit of the total content of the compound represented by the general formula (P) is 0.01%, 0.03%, 0.05%, 0.08%, 0.1%, 0.15%, 0.2%, 0.25%, and 0.3% relative to the composition containing the compound represented by the general formula (P) of the present invention.

The preferred upper limit of the total content of the compounds represented by the general formula (P) is 10%, 8%, 5%, 3%, 1.5%, 1.2%, 1%, 0.8%, and 0.5% relative to the composition containing the compounds represented by the general formula (P) of the present invention.

If the content is too low, the effect of adding the compound represented by the general formula (P) will be difficult to show, resulting in a weak alignment control of the liquid crystal composition, or the alignment control will weaken over time. If the content is too high, the amount remaining after curing will increase, curing will take time, and the reliability of the liquid crystal will decrease. Therefore, the content is set in consideration of the balance between the above.

The compound represented by the general formula (P) is preferably a compound represented by the general formula (P-1), the general formula (P-2), the general formula (P-3), and the general formula (P-4).

(wherein, P ^p11 , P ^p12 , P ^p21 , P ^p22 , P ^p31 , P ^p32 , P ^p41 and P ^p42 each independently represent the same meaning as P ^p1 in the general formula (P), Sp ^p11 , Sp ^p12 , Sp ^p21 , Sp ^p22 , Sp ^p31 , Sp ^p32 , Sp ^p41 and Sp ^p42 each independently represent the same meaning as Sp ^p1 in the general formula (P), A ^p11 , A ^p12 , A ^p13 , A ^p21 , A ^p22 , A ^p23 , A ^p32 and A p41 ^p42 independently represents 1,4-phenylene, 1,4-cyclohexylene, anthracene-2,6-diyl, phenanthrene-2,7-diyl, pyridine-2,5-diyl, pyrimidine-2,5-diyl, naphthalene-2,6-diyl, indane-2,5-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or 1,3-dioxane-2,5-diyl, A ^p11 , A ^p12 , A ^p13 , A ^p21 , A ^p22 , A ^p23 , A ^p32 and A p43 ^p42 is independently unsubstituted or may be substituted by an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a halogenated alkoxy group having 1 to 12 carbon atoms, a halogen atom, a cyano group, a nitro group or -Sp ^p2 -P ^p2 in the general formula (P); A ^p41 has the same meaning as A ^p1 in the general formula (P); A ^p43 has the same meaning as A ^p3 in the general formula (P); Z ^p21 , Z ^p22 , Z ^p41 and Z ^p42 represent a single bond, -O-, -S-, -CH ₂ -, -OCH ₂ -, -CH ₂ O-, -CO-, -C ₂ H ₄ -, -COO-, -OCO-, -OCOOCH ₂ -, -CH ₂ OCOO-, -OCH ₂ CH ₂ O-, -CO-NR ^ZP1 -, -NR ^ZP1 -CO-, -SCH ₂ -, -CH ₂ S-, -CH＝CR ^ZP1 -COO-, -CH＝CR ^ZP1 -OCO-, -COO-CR ^ZP1 ＝CH-, -OCO-CR ^ZP1 ＝CH-COO-, -COO-CR ^ZP1 ＝CH-OCO-, -OCO-CR ^ZP1 =CH-COO-, -OCO-CR ^ZP1 =CH-OCO-, -(CH ₂ ) ₂ -COO-, -(CH ₂ ) ₂ -OCO-, ^-OCO- (CH ₂ ) ₂ -, -(C＝O)-O-(CH ₂ ) ₂ -, -CH＝CH-, -CF＝CF-, -CF＝CH-, -CH＝CF-, -CF ₂ -, -CF ₂ O-, -OCF ₂ -, -CF ₂ CH ₂ -, -CH ₂ CF ₂ -, -CF ₂ CF ₂ - or -C≡C- (wherein R ^ZP1 each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and when a plurality of R ^ZP1 exist in the molecule, they may be the same or different), but at least one of Z ^p21 and Z ^p22 present in the molecule represents other than a single bond) P ^p11 , P p12 , P ^p21 , P p22 , P p31 , P ^p32 , P ^p41 and P p42 are preferably each independently the same as P ^p1 in the general formula (P) and are any one of the formulas (P ^p1 -1) to (P ^p1 -3), preferably (P ^p1 -1), R ^p11 and R ^p22 are each independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and when a plurality of R ^ZP1 exist in the molecule, they may be the same or different), but at least one of Z ^p21 and Z ^p22 present in the molecule represents other than a single bond. Preferably, ^p12 is independently a hydrogen atom or a methyl group.

Sp ^p11 , Sp ^p12 , Sp ^p21 , Sp ^p22 , Sp ^p31 , Sp ^p32 , Sp ^p41 and Sp ^p42 independently represent a single bond or an alkylene group having 1 to 30 carbon atoms. The -CH ₂ - in the alkylene group may be substituted by -O-, -CO-, -COO-, -OCO-, -CH=CH- or -C≡C- as long as the oxygen atoms are not directly bonded to each other. The hydrogen atom in the alkylene group may be substituted by a halogen atom. Preferably, it is a straight-chain alkylene group having 1 to 10 carbon atoms or a single bond.

A ^p11 , A ^p12 , A ^p13 , A ^p21 , A p22 , A ^p23 , A ^p32 and A ^p42 are preferably independently 1,4-phenylene, 1,4-cyclohexylene, anthracene-2,6-diyl, phenanthrene-2,7-diyl ^or naphthalene-2,6-diyl, and are preferably 1,4-phenylene, 1,4-cyclohexylene, phenanthrene-2,7-diyl or naphthalene-2,6-diyl. In general formulas (P-1) and (P-2), they are preferably independently 1,4-phenylene or 1,4-cyclohexylene. In order to improve the compatibility with the liquid crystal compound, one or more hydrogen atoms in the structure may be substituted by methyl, ethyl, methoxy, ethoxy or fluorine atoms. In the general formula (P-3), phenanthrene-2,7-diyl is preferred. In order to improve the compatibility with the liquid crystal compound, one or more hydrogen atoms in the structure may be substituted by methyl, ethyl, methoxy, ethoxy or fluorine atoms.

^Zp21 is preferably a single bond, _-OCH2- , _-CH2O- , -CO-, -C2H4-, -COO-, -OCO-, _-COOC2H4- , -OCOC2H4-, -C2H4OCO-, -C2H4COO-, _-CH = _{CH-, -CF2-, -CF2O-, -(CH2)2-COO-, -(CH2)2 - OCO- , -OCO- ( CH2 ) 2- , -CH =} CH-COO-, _-COO - _{CH =} CH-, -OCOCH=CH-, -COO-( _CH2 ) _2- , _-OCF2- or -C≡C-, preferably _a single bond, _-OCH2- , _-CH2O- , -C ₂ H ₄ -, -COO-, -OCO-, -COOC ₂ H ₄ -, -OCOC ₂ H ₄ -, -C ₂ H ₄ OCO-, -C ₂ H ₄ COO-, -CH＝CH-, -(CH ₂ ) ₂ -COO-, -(CH ₂ ) ₂ -OCO-, -OCO-(CH ₂ ) ₂ -, -CH＝CH-COO-, -COO-CH＝CH-, -OCOCH＝CH-, -COO-(CH ₂ ) ₂ - or -C≡C-; preferably, only one of the following groups is present in the molecule: -OCH ₂ -, -CH ₂ O-, -C ₂ H ₄ -, -COO-, -OCO-, -COOC ₂ H ₄ -, -OCOC ₂ H ₄ -, -C ₂ H ₄ OCO-, -C ₂ H ₄ COO-, -CH＝CH-, -(CH ₂ ) ₂ -COO-, -(CH ₂ ) ₂ -OCO-, -OCO-(CH ₂ ) ₂ -, -CH＝CH-COO-, -COO-CH＝CH-, -OCOCH＝CH-, -COO-(CH ₂ ) ₂ -, or -C≡C-, and all the others are single bonds. It is preferred that only one of the groups present in the molecule is -OCH ₂ -, -CH ₂ O-, -C ₂ H ₄ -, -COO-, or -OCO-, and all the others are single bonds. It is more preferred that all are single bonds.

Furthermore, it is preferred that only one of the Z ^{p21 groups} present in the molecule is a bonding group selected from the group consisting of -(CH ₂ ) ₂ -COO-, -(CH ₂ ) ₂ -OCO-, -O-CO-(CH ₂ ) ₂ -, and -COO-(CH ₂ ) ₂ -, and the others are single bonds.

Preferred examples of the compound represented by the general formula (P-1) of the present invention include polymerizable compounds represented by the following formulas (P-1-1) to (P-1-46).

(In the formula, P ^p11 , P ^p12 , Sp ^p11 and Sp ^p12 have the same meanings as P ^p11 , P ^p12 , Sp ^p11 and Sp ^p12 in the general formula (P-1)) Preferred examples of the compound represented by the general formula (P-2) of the present invention include polymerizable compounds represented by the following formulas (P-2-1) to (P-2-12).

(wherein, ^Pp21 , ^Pp22 , ^Spp21 and ^Spp22 have the same meanings as ^Pp21 , ^Pp22 , ^Spp21 and ^Spp22 in the general formula (P-2)) Preferred examples of the compound represented by the general formula (P-3) of the present invention include polymerizable compounds represented by the following formulas (P-3-1) to (P-3-15).

(wherein, ^Pp31 , ^Pp32 , ^Spp31 and ^Spp32 have the same meanings as ^Pp31 , ^Pp32 , ^Spp31 and ^Spp32 in the general formula (P-3)) Preferred examples of the compound represented by the general formula (P-4) of the present invention include polymerizable compounds represented by the following formulas (P-4-1) to (P-4-15).

(wherein, P ^p41 , P ^p42 , Sp ^p41 and Sp ^p42 have the same meanings as P ^p41 , P ^p42 , Sp ^p41 and Sp ^p42 in general formula (P-4)) The composition of the present invention may further contain one or more compounds (Q) as additives in order to improve reliability. The compound (Q) preferably has the following structure.

(In the formula, R ^Q represents a hydroxyl group, a hydrogen atom, a straight-chain alkyl group or a branched-chain alkyl group having 1 to 22 carbon atoms, one or more CH ₂ groups in the alkyl group can be replaced by -O-, -CH＝CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ - in a manner that the oxygen atom is not directly adjacent to the alkyl group, and the * is bonded to other structures) R ^Q represents a straight-chain alkyl group or a branched-chain alkyl group having 1 to 22 carbon atoms, one or more CH ₂ groups in the alkyl group can be replaced by -O-, -CH＝CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ - in a manner that the oxygen atom is not directly adjacent to the alkyl group, and the * is bonded to other structures) -substituted, preferably a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group, a linear alkyl group in which one _CH2 group is substituted by -OCO- or -COO-, a branched alkyl group, a branched alkoxy group, a branched alkyl group in which one _CH2 group is substituted by -OCO- or -COO-, more preferably a linear alkyl group having 1 to 20 carbon atoms, a linear alkyl group in which one _CH2 group is substituted by -OCO- or -COO-, a branched alkyl group, a branched alkoxy group, a branched alkyl group in which one _CH2 group is substituted by -OCO- or -COO-. ^{M Q} represents trans-1,4-cyclohexylene, 1,4-phenylene or a single bond, preferably trans-1,4-cyclohexylene or 1,4-phenylene.

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

In the formula, R ^Q1 is preferably a linear or branched alkyl group having 1 to 10 carbon atoms, R ^Q2 is preferably a linear or branched alkyl group having 1 to 20 carbon atoms, R ^Q3 is preferably a linear alkyl group, branched alkyl group, linear alkoxy group or branched alkoxy group having 1 to 8 carbon atoms, and L ^Q is preferably a linear or branched alkyl group having 1 to 8 carbon atoms. Among the compounds represented by general formula (Q-a) to general formula (Q-d), the compounds represented by general formula (Q-c) and general formula (Q-d) are more preferred.

The composition of the present invention preferably contains 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 0.001 to 0.1%, and particularly preferably 0.001 to 0.05%.

Furthermore, as the antioxidant or photostabilizer that can be used in the present invention, specifically, the compounds represented by the following (Q-1) to (Q-44) are preferred.

(where n represents an integer from 0 to 20) The liquid crystal composition of this embodiment is applied to a liquid crystal display element. Hereinafter, an example of a liquid crystal display element of this embodiment will be described while appropriately referring to FIGS. 1 and 2.

FIG. 1 is a diagram schematically showing the structure of a liquid crystal display element. In FIG. 1 , for the convenience of explanation, each component is shown separated. As shown in FIG. 1 , the liquid crystal display element 1 of this embodiment has a first substrate 2 and a second substrate 3 arranged in an opposing manner, and a liquid crystal layer 4 disposed between the first substrate 2 and the second substrate 3. The liquid crystal layer 4 is composed of the liquid crystal composition of the above-mentioned embodiment.

A pixel electrode layer 5 is formed on the first substrate 2 on the liquid crystal layer 4 side. A common electrode layer 6 is formed on the second substrate 3 on the liquid crystal layer 4 side. The first substrate 2 and the second substrate 3 may also be sandwiched by a pair of polarizing plates 7 and 8. A color filter 9 may also be further provided on the liquid crystal layer 4 side of the second substrate 3.

That is, a liquid crystal display element 1 of one embodiment has a structure in which a first polarizing plate 7, a first substrate 2, a pixel electrode layer 5, a liquid crystal layer 4 containing a liquid crystal composition, a common electrode layer 6, a color filter 9, a second substrate 3, and a second polarizing plate 8 are sequentially stacked.

The first substrate 2 and the second substrate 3 are formed of a flexible material such as glass or plastic. At least one of the first substrate 2 and the second substrate 3 is formed of a transparent material, and the other can be formed of a transparent material or an opaque material such as metal or silicon. The first substrate 2 and the second substrate 3 are bonded to each other by a sealing material and a sealing material such as an epoxy-based thermosetting composition arranged in the peripheral area. In order to maintain the distance between the substrates, a granular spacer such as glass particles, plastic particles, aluminum oxide particles, etc., or a spacer column composed of a resin formed by photolithography can also be arranged therebetween.

The first polarizer 7 and the second polarizer 8 can be adjusted in such a way that the polarization axis of each polarizer is adjusted to improve the viewing angle or contrast, and preferably, the transmission axes thereof are operated in a normally black display mode so as to have mutually orthogonal transmission axes. It is particularly preferred that either the first polarizer 7 or the second polarizer 8 is configured in such a way that it has a transmission axis parallel to the alignment direction of the liquid crystal molecules when no voltage is applied.

From the viewpoint of preventing light leakage, the color filter 9 is preferably formed as a black matrix, and preferably a black matrix is formed at a portion corresponding to the thin film transistor (not shown).

The black matrix can be disposed together with the color filter on the substrate opposite to the array substrate, or on the side of the array substrate, or separately, that is, the black matrix is disposed on the array substrate and the color filter is disposed on the other substrate. In addition, the black matrix can be disposed separately from the color filter, or the transmittance can be reduced by overlapping the colors of the color filter.

FIG2 is an enlarged top view of a portion of the pixel electrode layer 5 formed on the first substrate 2 in FIG1, namely, the area surrounded by the I line. As shown in FIG2, in the pixel electrode layer 5 including thin film transistors formed on the surface of the first substrate 2, a plurality of gate bus lines 11 for supplying scanning signals and a plurality of data bus lines 12 for supplying display signals intersect with each other and are arranged in a matrix. Furthermore, FIG2 only shows a pair of gate bus lines 11, 11 and a pair of data bus lines 12, 12.

A unit pixel of a liquid crystal display element is formed by an area surrounded by a plurality of gate bus lines 11 and a plurality of data bus lines 12, and a pixel electrode 13 is formed in the unit pixel. The pixel electrode 13 has a so-called fishbone structure having two main trunks that are orthogonal to each other and form a cross shape and a plurality of branches extending from each main trunk. In addition, a Cs electrode 14 is provided between a pair of gate bus lines 11, 11 and is substantially parallel to the gate bus line 11. In addition, a thin film transistor including a source electrode 15 and a drain electrode 16 is provided near the intersection where the gate bus line 11 and the data bus line 12 intersect each other. The drain electrode 16 is provided with a contact hole 17 .

The gate bus line 11 and the data bus line 12 are preferably formed of metal films, more preferably Al, Cu, Au, Ag, Cr, Ta, Ti, Mo, W, Ni or alloys thereof, and further preferably Mo, Al or alloys thereof.

In order to improve the transmittance, the pixel electrode 13 is preferably a transparent electrode. The transparent electrode is formed by sputtering an oxide semiconductor (ZnO, InGaZnO, SiGe, GaAs, IZO (Indium Zinc Oxide), ITO (Indium Tin Oxide), SnO, TiO, AZTO (AlZnSnO), etc.). At this time, the film thickness of the transparent electrode can be 10 to 200 nm. In addition, in order to reduce the resistance, the transparent electrode can also be formed in the form of a polycrystalline ITO film by calcining an amorphous ITO film.

The liquid crystal display element of this embodiment can be formed by sputtering a metal material such as Al or its alloy to form wiring on the first substrate 2 and the second substrate 3, and form a pixel electrode layer 5 and a common electrode layer 6 respectively. In addition, the color filter 9 can be produced by, for example, a pigment dispersion method, a printing method, an electroplating method, or a dyeing method. If the method of producing a color filter using the pigment dispersion method is explained as an example, a curable coloring composition for the color filter is applied to the transparent substrate, a patterning treatment is performed, and then it is cured by heating or light irradiation. By performing this step for the three colors of red, green, and blue, a pixel portion for the color filter can be produced. In addition, the color filter 9 can also be arranged on the side of the substrate having TFT, etc.

The first substrate 2 and the second substrate 3 are opposed to each other with the pixel electrode layer 5 and the common electrode layer 6 being respectively placed inside. At this time, the distance between the first substrate 2 and the second substrate 3 can also be adjusted via a spacer. At this time, the thickness of the liquid crystal layer 4 is preferably adjusted to be, for example, 1-100 μm.

When polarizing plates 7 and 8 are used, it is preferable to adjust the product of the refractive index anisotropy Δn of the liquid crystal layer 4 and the thickness of the liquid crystal layer 4 in such a way that the contrast is maximized. In addition, when two polarizing plates 7 and 8 are used, the polarization axes of each polarizing plate can be adjusted to make the viewing angle or contrast better. Furthermore, a phase difference film for expanding the viewing angle can also be used. Thereafter, a sealant such as an epoxy-based thermosetting composition is screen-printed on the substrate in a form provided with a liquid crystal injection port, and the substrates are bonded to each other and heated to thermally cure the sealant.

As a method for sandwiching the composition between the two substrates 2 and 3, a conventional vacuum injection method or a drop injection (ODF: One Drop Fill) method can be used. Although no drop marks are generated in the vacuum injection method, there is a problem of residual injection marks. In this embodiment, it is more appropriate to use a "display element manufactured using the ODF method". In the liquid crystal display element manufacturing step of the ODF method, a dispenser is used to draw an epoxy-based photothermal curing sealant in a closed-loop dam shape on any substrate of the bottom plate or the front plate, in which a specific amount of the composition is dropped under degassing, and the front plate and the bottom plate are joined to manufacture a liquid crystal display element. In this embodiment, the generation of drop marks when the liquid crystal composition is dropped onto the substrate can be suppressed in the ODF method. Furthermore, the so-called dripping mark is defined as the phenomenon that the traces of the liquid crystal composition dripped on the black display appear white.

Furthermore, in the manufacturing process of liquid crystal display elements using the ODF method, the optimal liquid crystal injection amount must be dripped according to the size of the liquid crystal display element. The liquid crystal composition of this embodiment is less affected by the rapid pressure change or impact in the dripping device generated when the liquid crystal is dripped, and the liquid crystal can be dripped stably for a long time, so the yield of the liquid crystal display element can also be maintained at a high level. In particular, since the optimal liquid crystal injection amount of small liquid crystal display elements that are often used in recently popular smart phones is small, it is difficult to control the deviation from the optimal value within a certain range. By using the liquid crystal composition of this embodiment, a stable liquid crystal material ejection amount can be achieved in small liquid crystal display elements.

In the case where the liquid crystal composition of the present embodiment contains a polymerizable compound, as a method for polymerizing the polymerizable compound, in order to obtain good alignment properties of the liquid crystal, it is more ideal to have an appropriate polymerization speed, so it is better to use a method of polymerizing by irradiating a single active energy ray such as ultraviolet light or electron beam, or using them together or sequentially. When ultraviolet light is used, a polarized light source can be used, and a non-polarized light source can also be used. In addition, when the composition containing the polymerizable compound is sandwiched between two substrates for polymerization, at least the substrate on the irradiated side must be given appropriate transparency to the active energy ray. In addition, the following means can also be used: after using a mask to polymerize only a specific part during light irradiation, the alignment state of the unpolymerized part is changed by changing the conditions such as the electric field, magnetic field or temperature, and then further irradiating with active energy rays to polymerize it. In particular, when performing ultraviolet exposure, it is preferred to perform ultraviolet exposure while applying an alternating electric field to the composition containing the polymerizable compound. The applied alternating electric field is preferably an alternating current with a frequency of 10 Hz to 10 kHz, and more preferably a frequency of 60 Hz to 10 kHz, and the voltage is selected depending on the desired pre-tilt angle of the liquid crystal display element. That is, the pre-tilt angle of the liquid crystal display element can be controlled by the applied voltage. In a lateral electric field type MVA mode liquid crystal display device, from the viewpoint of alignment stability and contrast, it is preferred to control the pre-tilt angle to 80 degrees to 89.9 degrees.

The temperature during irradiation is preferably within a temperature range that maintains the liquid crystal state of the composition of the present embodiment. It is preferred to perform polymerization at a temperature close to room temperature, that is, typically at a temperature of 15 to 35°C. As a lamp that generates ultraviolet light, a metal halide lamp, a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, etc. can be used. In addition, as the wavelength of the irradiated ultraviolet light, it is preferred to irradiate ultraviolet light in a wavelength region that is not the absorption wavelength region of the composition, and it is preferred to intercept the ultraviolet light as needed. The intensity of the irradiated ultraviolet light is preferably 0.1 mW/ ^cm2 to 100 W/ ^cm2 , and more preferably 2 mW/ ^cm2 to 50 W/ ^cm2 . The energy of the irradiated ultraviolet light can be appropriately adjusted, preferably 10 mJ/cm ² to 500 J/cm ² , more preferably 100 mJ/cm ² to 200 J/cm ² . The intensity can also be changed during the irradiation of ultraviolet light. The irradiation time of ultraviolet light is appropriately selected according to the intensity of the irradiated ultraviolet light, preferably 10 seconds to 3600 seconds, more preferably 10 seconds to 600 seconds.

The liquid crystal display element 1 can be an active matrix driven liquid crystal display element. The liquid crystal display element 1 can also be a PSA type, PSVA type, VA type, IPS type, FFS type or ECB type liquid crystal display element, preferably a PSA type liquid crystal display element. [Example]

The following examples are given to further describe the present invention, but the present invention is not limited to these examples. In addition, the "%" in the compositions of the following examples and comparative examples means "mass %". The following codes are used to describe the liquid crystal compounds in the examples. (Ring structure)

(Side chain structure and connection structure)

[Table 1]

In the embodiment, the measured properties are as follows. Unless otherwise specified, the measurements were made according to the method specified in JEITA ED-2521B.

_TNI : Nematic-isotropic liquid phase transition temperature (℃) _TCN : Solid-liquid crystal phase transition phase (℃) Δn: Refractive index anisotropy at 25℃γ1: Rotational viscosity at 25℃ (mPa･s) Δε: Dielectric conductivity at 25℃K11: Elastic constant K11 at 25℃ (pN) K33: Elastic constant K33 at 25℃ (pN) Solubility evaluation test: The liquid crystal composition was observed at -25℃. The presence of precipitation was visually observed and judged according to the following two stages. In addition, the observation was performed 10 days after the preparation of the liquid crystal composition.

○: Precipitation cannot be confirmed ×: Precipitation can be confirmed Electro-optical characteristics evaluation test (V50): After irradiation with ultraviolet rays, the electro-optical characteristics are evaluated. The transmittance is measured when a voltage of 0 to 10V is applied. The voltage at which the maximum transmittance is 50% is set as V50. The electro-optical characteristics are measured using OPTIPRO manufactured by Shintec. The smaller the V50, the higher the transmittance of the LCD panel, and high transmittance can be obtained at a lower voltage.

Voltage holding ratio (VHR): The voltage holding ratio (%) of the liquid crystal display element after irradiation with UV light of 313nm and 3mW/ ^cm2 for 60 minutes was evaluated at 1V, 60Hz, and 60℃. (Method for preparing the liquid crystal evaluation unit) First, a liquid crystal composition containing a polymerizable compound is coated on a polyimide alignment film with a cell gap of 3.8μm and inducing vertical alignment, and then vacuum injection is injected into a liquid crystal unit with an ITO substrate that has been rubbed with the aforementioned polyimide alignment film. JALS2096 manufactured by JSR Corporation is used as the vertical alignment film forming material. After that, a 10V voltage was applied to the liquid crystal unit injected with the liquid crystal composition containing the polymerizable compound at a frequency of 100Hz, and ultraviolet rays were irradiated using a high-pressure mercury lamp through a filter that cuts off ultraviolet rays below 325nm. At this time, the ultraviolet rays were adjusted to have an illuminance of 100mW/ ^cm2 measured under the condition of a central wavelength of 365nm and an accumulated light quantity of 30J/ ^cm2 . The above ultraviolet irradiation condition was set as irradiation condition 1. The pre-tilt angle was given to the liquid crystal molecules in the liquid crystal unit by this irradiation condition 1.

Next, a fluorescent UV lamp was used and adjusted to an illuminance of 3 mW/ ^cm2 measured at a central wavelength of 313 nm, and ultraviolet light with a cumulative light amount of 10 J/ ^cm2 was further irradiated to obtain a liquid crystal display element. The above ultraviolet irradiation condition is set as irradiation condition 2. By irradiation condition 2, the residual amount of polymerizable compounds in the liquid crystal unit that did not react during irradiation condition 1 is reduced. (Preparation of liquid crystal composition) Liquid crystal compositions LC-1 and RLC-1 to RLC-R4 shown in the following table were prepared, and their physical properties were measured. The physical properties are shown in Tables 1 and 2. In addition, the T _NI of the PSA liquid crystal composition used in PID is usually above 100°C, so in this embodiment, the liquid crystal composition above 100°C is used as the evaluation object.

[Table 2]

[Table 3]

(Example 1, Comparative Examples 1 to 4) A liquid crystal composition containing a polymerizable compound obtained by adding 0.3 parts by mass of a compound represented by formula (RM-1) to 100 parts by mass of the liquid crystal composition LC-1 is used as Example 1.

A liquid crystal composition containing a polymerizable compound obtained by adding 0.3 parts by mass of a compound represented by formula (RM-1) to 100 parts by mass of the liquid crystal composition RLC-1 was prepared as Comparative Example 1.

Comparative Example 2 was prepared by adding 0.3 parts by mass of a polymerizable compound represented by the formula (RM-1) to 100 parts by mass of the liquid crystal composition RLC-2.

Comparative Example 3 was prepared as a liquid crystal composition containing a polymerizable compound obtained by adding 0.3 parts by mass of a compound represented by the formula (RM-1) to 100 parts by mass of the liquid crystal composition RLC-3.

Comparative Example 4 was prepared by adding 0.3 parts by mass of a polymerizable compound represented by the formula (RM-1) to 100 parts by mass of the liquid crystal composition RLC-4.

The solubility test evaluation and V50 of Example 1 and Comparative Examples 1 to 4 are shown in Table 4 below.

[Table 4]

The result of the solubility evaluation test of Example 1 was that no precipitation was confirmed. The V50 was evaluated and a very low value was confirmed. _TNI was 113.1°C and _TCN was -41°C. The response speed of the liquid crystal display element using it was measured and the result confirmed a sufficiently high-speed response. Furthermore, the cell thickness was 3.8μm, the alignment film was JALS2096, the response speed measurement conditions were: Von was 6V, Voff was 1V, the measurement temperature was 20°C, and the measurement machine used was OPTIPRO manufactured by Shintec. In addition, it was confirmed that the voltage holding ratio (VHR) was high.

From the above content, it was confirmed that the liquid crystal display element using the liquid crystal composition of Example 1 showed excellent low-temperature storage stability, low driving voltage, fast response speed, and high VHR. The solubility of Comparative Examples 1 to 4 was evaluated, and precipitation was confirmed. V50 was evaluated, and a value higher than that of Example 1 was confirmed. _TCN was above 0°C. It was thus confirmed that Comparative Examples 1 to 4 had poor solubility, a narrow driving temperature range, and low transmittance. Furthermore, in Comparative Example 1, precipitation of constituent components occurred immediately after the liquid crystal composition was prepared, so it was impossible to carry out physical property measurements and electro-optical property tests of the liquid crystal composition. (Examples 2 to 8) Example 2 was a liquid crystal composition containing a polymerizable compound obtained by adding 0.3 parts by mass of a compound represented by formula (RM-1) to 100 parts by mass of the liquid crystal composition LC-2.

Example 3 was prepared by adding 0.3 parts by mass of a polymerizable compound represented by the formula (RM-2) to 100 parts by mass of the liquid crystal composition LC-3.

Example 4 was prepared by adding 0.3 parts by mass of a polymerizable compound represented by the formula (RM-2) to 100 parts by mass of the liquid crystal composition LC-4.

Example 5 was prepared by adding 0.3 parts by mass of a polymerizable compound represented by the formula (RM-1) to 100 parts by mass of the liquid crystal composition LC-5.

Example 6 was prepared as a liquid crystal composition containing a polymerizable compound obtained by adding 0.3 parts by mass of a compound represented by formula (RM-1) to 100 parts by mass of the liquid crystal composition LC-6.

Example 7 was prepared by adding 0.3 parts by mass of a polymerizable compound represented by the formula (RM-1) to 100 parts by mass of the liquid crystal composition LC-7.

A liquid crystal composition containing a polymerizable compound formed by adding 0.3 parts by mass of a compound represented by formula (RM-1) relative to 100 parts by mass of the liquid crystal composition LC-8 is used as Example 8. A liquid crystal composition containing a polymerizable compound formed by adding 0.2 parts by mass of a compound represented by formula (RM-1) and 0.1 parts by mass of a compound represented by formula (RM-2) relative to 100 parts by mass of the liquid crystal composition LC-8 is used as Example 9.

The solubility evaluation test and V50 of Examples 2 to 9 are shown in Table 5 below.

[Table 5]

The solubility of Examples 2 to 8 was evaluated, and no precipitation was confirmed. V50 was evaluated, and the result was confirmed to be a very low value. _TNI was above 110°C, and _TCN was below -30°C. The response speed of the liquid crystal display element using it was measured, and the result confirmed a sufficiently high-speed response. Furthermore, the cell thickness was 3.8μm, the orientation film was JALS2096, the response speed measurement conditions were: Von was 6V, Voff was 1V, the measurement temperature was 20°C, and the measurement machine used was OPTIPRO manufactured by Shintec. In addition, it was confirmed that the voltage holding ratio (VHR) was high. In addition, in all embodiments, no display defects such as afterimages and unevenness were confirmed.

From the above, it was confirmed that the liquid crystal display device using the liquid crystal composition of Examples 2 to 8 exhibited excellent low-temperature storage stability, low driving voltage, fast response speed, and high VHR.

1: LCD element 2: First substrate 3: Second substrate 4: LCD layer 5: Pixel electrode layer 6: Common electrode layer 7: First polarizer 8: Second polarizer 9: Color filter 11: Gate bus line 12: Data bus line 13: Pixel electrode 14: Cs electrode 15: Source electrode 16: Drain electrode 17: Contact hole

FIG1 is a diagram schematically showing one embodiment of a liquid crystal display element. FIG2 is an enlarged top view of the area surrounded by the I line in FIG1.

Claims (6)

A liquid crystal composition comprising one or more compounds represented by the general formula (N-1) and one or more polymerizable compounds, wherein the compound represented by the general formula (N-1) comprises n ^N11 being an integer of 1 or 2 and at least one Z ^N11 being -CH ₂ O-, and one or more compounds represented by the general formula (N-1-10) and one or more compounds represented by the general formula (N-1-11), and as the compound represented by the general formula (N-1), one or more compounds represented by the general formula (N-1-3) are contained, and the liquid crystal composition further contains one or more compounds represented by the general formula (L-1), one or more compounds represented by the general formula (L-4), and one or more compounds represented by the general formula (L-5); the liquid crystal composition has a nematic-isotropic liquidus transition temperature (T _NI ) of 110° C. or higher and a negative dielectric anisotropy (Δε);

(wherein, R ^N11 and R ^N12 each independently represent an alkyl group having 1 to 8 carbon atoms, one or two or more non-adjacent -CH ₂ - in the alkyl group may each independently be substituted by -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-, A ^N11 and A ^N12 each independently represent a group selected from the group consisting of the following groups (a) to (c), (a) 1,4-cyclohexylene (one -CH ₂ - or two or more non-adjacent -CH ₂ - in the group may be substituted by -O-), (b) 1,4-phenylene (one -CH= or two or more non-adjacent -CH= in the group may be substituted by -N=), and (c) 1,4-cyclohexenylene, The hydrogen atoms in the above-mentioned groups (a), (b), and (c) may be independently substituted by cyano, fluorine or chlorine atoms, respectively; ^ZN11 and ^ZN12 independently represent a single bond, _-CH2CH2- , -( _CH2 ) _4- , -OCH2-, _-CH2O- , -COO-, _-OCO- , _-OCF2- , _-CF2O- , -CH=NN=CH-, -CH=CH-, -CF=CF- or -C≡C-; ^nN11 and ^nN12 independently represent an integer of 0 to 3, ^nN11 + ^nN12 is ₁ , 2 or 3; when there are plural ^AN11 and ^AN12 , ^ZN11 and ^ZN12 , they may be the same or different);

(wherein, ^RN1101 and ^RN1102 have the same meanings as ^RN11 and ^RN12 in the general formula (N-1));

(wherein, R ^N1111 and R ^N1112 independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N-1));

(wherein, ^RN131 and ^RN132 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N-1));

(wherein, ^RL11 and ^RL12 independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent _-CH2- groups in the alkyl group may be independently substituted by -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-);

(wherein, R ^L41 and R ^L42 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may also be independently substituted by -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-);

(wherein, R ^L51 and R ^L52 independently represent an alkyl group having 1 to 8 carbon atoms, and one or more non-adjacent -CH ₂ - in the alkyl group may be independently substituted by -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-); and, the lower limit of the total content of the compounds represented by the above general formula (N-1-10) is 1% by mass and the upper limit is 8% by mass relative to the total amount of the composition; the lower limit of the total content of the compounds represented by the above general formula (N-1-11) is 25% by mass and the upper limit is 35% by mass relative to the total amount of the composition; the lower limit of the total content of the compounds represented by the above general formula (N-1-3) is The total amount of the compounds represented by the above general formula (L-1) is 13% by mass, and the upper limit is 30% by mass relative to the total amount of the composition; the lower limit of the total amount of the compounds represented by the above general formula (L-4) is 5% by mass relative to the total amount of the composition, and the upper limit is 15% by mass relative to the total amount of the composition; the lower limit of the total amount of the compounds represented by the above general formula (L-5) is 2% by mass relative to the total amount of the composition, and the upper limit is 10% by mass relative to the total amount of the composition. The liquid crystal composition as claimed in claim 1, wherein the compound represented by the above-mentioned (L-4) comprises compounds represented by the following formulas (L-4.4) and (L-4.5),

The liquid crystal composition as claimed in claim 1 or 2, comprising one or more compounds represented by the general formula (P) as polymerizable compounds,

(In the above general formula (P), ^Rp1 represents a hydrogen atom, a fluorine atom, a cyano group, an alkyl group having 1 to 15 carbon atoms in which the hydrogen atom may be substituted by a halogen atom, an alkoxy group having 1 to 15 carbon atoms in which the hydrogen atom may be substituted by a halogen atom, an alkenyl group having 1 to 15 carbon atoms in which the hydrogen atom may be substituted by a halogen atom, an alkenyloxy group having 1 to 15 carbon atoms in which the hydrogen atom may be substituted by a halogen atom ^{, or -Spp2-Pp2 , Pp1} and ^Pp2 each independently represent any one of the general formulae ( ^Pp1-1 ) to ( ^Pp1-9 ),

(wherein, R ^p11 and R ^p12 each independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms or a halogenated alkyl group having 1 to 5 carbon atoms, W ^p11 represents a single bond, -O-, -COO- or a methylene group, t ^p11 represents 0, 1 or 2, and when a plurality of R ^p11 , R ^p12 , W ^p11 and/or t ^p11 exist in the molecule, they may be the same or different), Sp ^p1 and Sp ^p2 each independently represent a single bond or a spacer group, Z ^p1 and Z ^p2 each independently represent a single bond, -O-, -S-, -CH ₂ -, -OCH ₂ -, -CH ₂ O-, -CO-, -C ₂ H ₄ -, -COO-, -OCO-, -OCOOCH ₂ -, -CH ₂ OCOO-, -OCH ₂ CH ₂ O-, -CO-NR ^ZP1 -, -NR ^ZP1 -CO-, -SCH ₂ -, -CH ₂ S-, -CH=CR ^ZP1 -COO-, -CH=CR ^ZP1 -OCO-, -COO-CR ^ZP1 =CH-, -OCO-CR ^ZP1 =CH-, -COO-CR ^ZP1 =CH-COO-, -COO-CR ^ZP1 =CH-OCO-, -OCO-CR ^ZP1 =CH-COO-, -OCO-CR ^ZP1 =CH-OCO-, -(CH ₂ ) ₂ -COO-, -(CH ₂ ) ₂ -OCO-, -OCO-(CH ₂ ) ₂ -, -(C=O)-O-(CH ₂ ) ₂ -, -CH=CH-, -CF=CF-, -CF=CH-, -CH=CF-, -CF ₂ -, -CF ₂ O-, -OCF ₂ -, -CF ₂ CH ₂ -, -CH ₂ CF ₂ -, -CF ₂ CF ₂ - or -C≡C- (wherein R ^ZP1 independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. When there are multiple R ^ZP1 in the molecule, they may be the same or different), ^Ap2 represents 1,4-phenylene, 1,4-cyclohexylene, anthracene-2,6-diyl, phenanthrene-2,7-diyl, pyridine-2,5-diyl, pyrimidine-2,5-diyl, naphthalene-2,6-diyl, indane-2,5-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or 1,3-dihydronaphthalene-2,7-diyl.

Alkane-2,5-diyl, A ^p2 is unsubstituted or may be substituted by an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a halogenated alkoxy group having 1 to 12 carbon atoms, a halogen atom, a cyano group, a nitro group, or -Sp ^p2 -P ^p2 , wherein when m ^p2 described later is 0 and m ^p1 described later is 2 or more, or when m ^p3 described later is 0 and m ^p4 described later is 2 or more, the above-mentioned A ^p2 further has a bond with m ^p1 or m ^p4 at any position of the respective group, and A ^p1 represents a group represented by (A ^p1 -11) to (A ^p1 -19),

(wherein, ★ is bonded to Sp ^p1 or Z ^p1 , ★★ is bonded to Z ^p1 , one or more hydrogen atoms in the structure may be substituted by an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a halogenated alkoxy group having 1 to 12 carbon atoms, a halogen atom, a cyano group, a nitro group, or -Sp ^p2 -P ^p2 ), A ^p3 represents a group represented by (A ^p3 -11) to (A ^p3 -19),

(wherein ★ is bonded to Z ^p2 , ★★ is bonded to R ^p1 or Z ^p2 , one or more hydrogen atoms in the structure may be substituted by an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a halogenated alkoxy group having 1 to 12 carbon atoms, a halogen atom, a cyano group, a nitro group, or -Sp ^p2 -P ^p2 ), m ^p2 and m ^p3 independently represent 0, 1, 2 or 3, m ^p1 and m ^p4 independently represent 1, 2 or 3, and when there are plural P ^p1 , Sp ^p1 , A ^p1 , Z ^p1 , Z ^p2 , A ^p3 and/or R ^p1 in the molecule, they may be the same or different). A liquid crystal display element using a liquid crystal composition as described in any one of claims 1 to 3. An active matrix driven liquid crystal display element using a liquid crystal composition as described in any one of claims 1 to 3. A VA type, IPS type, FFS type, PSA type or PSVA type liquid crystal display element, which uses the liquid crystal composition described in any one of claim 1 to 3.