TWI828766B - Liquid crystal composition - Google Patents

Abstract

The object of the present invention is to provide a polymerizable liquid crystal composition whose dielectric constant anisotropy (Δε) is negative and which satisfies the display in a wide temperature range, low voltage driveability and high speed required for ordinary liquid crystal compositions. Responsiveness, and no or very few display defects occur when manufacturing a liquid crystal display element; and a narrow-framed liquid crystal display element using the liquid crystal composition is provided. As a solution, a dielectric constant anisotropy containing one or two or more compounds selected from the compounds represented by the general formula (N-1) and one or two or more polymerizable compounds is provided. (Δε) is a negative liquid crystal composition, and a liquid crystal display element using the liquid crystal composition is provided.

Description

Liquid crystal composition

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

For displays used in PID (Public Information Display), etc., which are assumed to be used outdoors, the nematic phase to isotropic liquid phase transition temperature (T _NI ) must be high, the solid phase to nematic phase transition temperature (T _CN ) must be low, It has excellent low-temperature storage stability (Low Temperature Storage test), and further requires a low driving voltage, a large elastic constant (K ₃₃ ), and a sufficiently small rotational viscosity (γ ₁ ).

For this purpose, a PSA (Polymer Sustained Alignment) type liquid crystal display device using a liquid crystal composition with a negative dielectric anisotropy (Δε) is used. This PSA type liquid crystal display device has a structure in which a polymer structure is formed in the cell in order to control the pretilt angle of the liquid crystal molecules. It is useful as a liquid crystal display element due to its high-speed responsiveness and high contrast (Patent Document 1). However, in order to Further, a plurality of display devices are bonded together to achieve enlargement, and there are issues such as requiring narrow bezels.

Prior technical literature

patent documents

Patent document 1: WO2016/017569

The object of the present invention is to provide a polymerizable liquid crystal composition whose dielectric constant anisotropy (Δε) is negative and which satisfies the display in a wide temperature range, low-voltage driveability and performance required by ordinary liquid crystal compositions. It has high-speed responsiveness, and no or very few display defects occur when manufacturing a liquid crystal display element; and a liquid crystal display element with a narrow frame using the liquid crystal composition is provided.

The present invention provides a liquid crystal composition, which has a nematic phase-isotropic liquid phase transition temperature (Tni) of 100°C or above, a negative dielectric constant anisotropy (Δε), and contains a liquid crystal composition selected from the general formula (N- 1) One or more of the compounds represented include one or more polymerizable compounds, and one or more alignment aids having adsorption groups that are different from the polymerizable compounds. agent; and provide a liquid crystal display element using a liquid crystal composition.

(In the formula, R ^N11 and R ^N12 each independently represent an alkyl group with 1 to 8 carbon atoms. One or more than two non-adjacent -CH ₂ - in the alkyl group can be independently -CH=CH -, -C≡C-, -O-, -CO-, -COO- or -OCO- substitution, A ^N11 and A ^N12 respectively independently represent selected from the group consisting of the following groups (a) ~ groups (d) The group, (a) 1,4-cyclohexylene group (one -CH ₂ - or two or more non-adjacent -CH ₂ - present in this group can be substituted by -O-), (b) 1, 4-phenylene group (one -CH= or two or more non-adjacent -CH= present in this group may be substituted by -N=), (c) naphthalene-2,6-diyl, 1,2 ,3,4-tetrahydronaphthalene-2,6-diyl or decalin-2,6-diyl (present in naphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene- One -CH= or two or more non-adjacent -CH= in the 2,6-diyl may be substituted by -N=), and (d) 1,4-cyclohexenylene (1,4-cyclohexenylene ), the above-mentioned group (a), group (b), group (c) and group (d) can be independently substituted by a cyano group, a fluorine atom or a chlorine atom, Z ^N11 and Z ^N12 respectively independently represent a single bond, - CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -OCF ₂ -, -CF ₂ O-, -CH=NN=CH -, -CH=CH-, -CF=CF- or -C≡C-, n ^N11 and n ^N12 independently represent integers from 0 to 3, n ^N11 +n ^N12 is 1, 2 or 3, in A ^N11 When there are plural ~A ^N12 and Z ^N11 ~Z ^N12 , they may be the same or different).

The polymerizable liquid crystal of the present invention is particularly useful as an active matrix drive liquid crystal display element for PDI.

By using the polymerizable liquid crystal composition of the present invention, it is possible to obtain a liquid crystal display element that combines excellent low-temperature storage stability, low drive voltage, fast response speed, and high VHR, and further has a narrow frame, and can be used even outdoors. It can also fully cope with VA type, PSA type or PSVA type liquid crystal display elements.

1: Liquid crystal display element

2: First substrate

3: Second substrate

4: Liquid crystal layer

5: Pixel electrode layer

6: Common electrode layer

7, 8: Polarizing plate

9: Color filter

11: Gate bus line

12:Data bus line

13: Pixel electrode

14:Cs electrode

15: Source electrode

16: Drainage electrode

17:Contact hole

FIG. 1 is a diagram schematically showing an embodiment of a liquid crystal display element.

FIG. 2 is an enlarged plan view of the area enclosed by line I in FIG. 1 .

The liquid crystal composition of the present invention has negative dielectric constant anisotropy, the transition temperature between nematic phase and isotropic liquid is 100°C or more, the absolute value of dielectric constant anisotropy is 1.5 or more, and contains materials selected from the following: One or more compounds among the compound group represented by the general formula (N-1).

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

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

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

烷等飽和環結構時，較佳為直鏈狀的碳原子數1~5的烷基、直鏈狀的碳原子數1~4的烷氧基及直鏈狀的碳原子數2~5的烯基。為了使向列相穩定化，碳原子及存在時的氧原子的合計較佳為5以下，且較佳為直鏈狀。 In addition, when the ring structure to which it is bonded is a phenyl group (aromatic), it is preferably a linear alkyl group with 1 to 5 carbon atoms or a linear alkoxy group with 1 to 4 carbon atoms. and alkenyl groups with 4 to 5 carbon atoms, when the ring structure to which they are bonded is cyclohexane, pyran and di

In the case of a saturated ring structure such as an alkane, a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkyl group having 2 to 5 carbon atoms are preferred. alkenyl. In order to stabilize the nematic phase, the total number of carbon atoms and oxygen atoms when present is preferably 5 or less, and it is preferably linear.

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

A ^N11 and A ^N12 are independently preferably aromatic when increasing △n is required, and aliphatic in order to improve response speed, preferably representing 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, piperidin-1,4-diyl, naphthalene-2,6-diyl , Decalin-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, preferably represents the following structure,

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

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

n ^N11 + n ^N12 is preferably 1 or 2, preferably a combination in which n ^N11 is 1 and n ^N12 is 0, a combination in which n ^N11 is 2 and n ^N12 is 0, or a combination in which n ^N11 is 1 and n ^N12 is 1 , n ^N11 is a combination of 2 and n ^N12 is 1.

In the present invention, % means mass% unless otherwise specified.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (N-1) is 1%, 10%, 20%, 30%, 40%, 50%, 55% , 60%, 65%, 70%, 75%, 80%. The upper limits of the preferred content are 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, and 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 preferable that the above-mentioned lower limit value is low and the upper limit value is low. Furthermore, when Tni of the composition of the present invention is maintained high and a composition with good temperature stability is required, it is preferable that the above-mentioned lower limit value is low and the upper limit value is low. In addition, when the dielectric constant anisotropy is to be increased in order to keep the driving voltage low, it is preferable that the above-mentioned lower limit value is high and the upper limit value is high.

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

(In the formula, R ^N11 and R ^N12 have the same meaning as R ^N11 and R ^N12 in the general formula (N-1), n ^Na11 represents 0 or 1, n ^Nb11 represents 1 or 2, n ^Nc11 represents 0 or 1, n ^Nd11 represents 1 or 2, n ^Ne11 represents 1 or 2, n ^Nf12 represents 1 or 2, n ^Ng11 represents 1 or 2, A ^Ne11 represents trans-1,4-cyclohexylene or 1,4-phenylene, A ^Ng11 represents trans-1,4-cyclohexylene, 1,4-cyclohexenylene or 1,4-phenylene, but at least one represents 1,4-cyclohexenylene, Z ^Ne11 represents a single bond or ethylene group, but at least one present in the molecule represents an ethylene group, and the plurality of A ^Ne11 , Z ^Ne11 , and/or A ^Ng11 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).

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

(In the formula, R ^N111 and R ^N112 each independently represent the same meaning as R ^N11 and R ^N12 in 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, and is 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, and is preferably an ethoxy group or a butoxy group.

The compound represented by the general formula (N-1-1) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content lower will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

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

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

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

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

(In the formula, R ^N121 and R ^N122 each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1)).

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

The compound represented by general formula (N-1-2) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content lower will result in higher effects. When emphasis is placed on T _NI , setting the content higher will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

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

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

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

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

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

The compound represented by general formula (N-1-3) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content higher will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

The preferred lower limits of the content of the compound represented by formula (N-1-3) are 5%, 10%, 13%, 15%, 17%, and 20% relative to the total amount of the composition of the present invention. The upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, and 13% 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 the formula (N-1-3.1) to the formula (N-1-3.21), and is preferably a compound represented by the formula The compound represented by (N-1-3.1)~(N-1-3.7) and formula (N-1-3.21) is preferably formula (N-1-3.1), formula (N-1-3.2), Compounds represented by 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) ~ formula (N-1-3.4), formula (N-1-3.6) and formula (N-1-3.21) can be used alone or in combination, preferably It is a combination of formula (N-1-3.1) and formula (N-1-3.2), selected from formula (N-1-3.3), formula (N-1-3.4) and formula (N-1-3.6) A combination of 2 or 3 types. Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of individual compounds or these compounds is 5%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferred 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 general formula (N-1-4) is the following compound.

(In the formula, R ^N141 and R ^N142 each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1)).

R ^N141 and R ^N142 are each independently preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, and are preferably methyl or propyl group. , ethoxy or butoxy.

The compound represented by the general formula (N-1-4) can be used alone or in combination of two or more. compounds on. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content lower will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

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

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

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

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

(In the formula, ^RN151 and ^RN152 each independently represent the same meaning as ^RN11 and ^RN12 in the general formula (N-1)).

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

The compound represented by general formula (N-1-5) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content lower will result in higher effects. When emphasis is placed on T _NI , setting the content higher will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (N-1-5) is 5%, 8%, 10%, 13%, 15%, 17%, 20%. The upper limit of the preferred content is 35%, 33%, 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-1-5) is preferably a compound selected from the group of compounds represented by the formula (N-1-5.1) to the formula (N-1-5.6), and is preferably a compound represented by the formula (N-1-5.1), formula (N-1- 5.2) and compounds represented by 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. Relative to the total amount of the composition of the present invention, The preferred lower limits of the content alone or of these compounds are 5%, 8%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferred content is 35%, 33%, 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 general formula (N-1-10) is the following compound.

(In the formula, ^RN1101 and ^RN1102 each independently represent the same meaning as ^RN11 and ^RN12 in the general formula (N-1)).

R ^N1101 is preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, and is preferably ethyl, propyl, butyl, vinyl or 1-propenyl. R ^N1102 is preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, and is preferably an ethoxy group, a propoxy group or a butoxy group. .

The compound represented by general formula (N-1-10) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content lower will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

The preferred lower limits of the content of the compound represented by formula (N-1-10) are 5%, 10%, 13%, 15%, 17%, and 20% relative to the total amount of the composition of the present invention. The upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, and 13% 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 the formula (N-1-10.1) to the formula (N-1-10.14), and is preferably a compound represented by the formula The compounds represented by (N-1-10.1) to (N-1-10.5) are preferably compounds 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 content of these compounds is relative to the total amount of the composition of the present invention. The lower limit values are 5%, 10%, 13%, 15%, 17% and 20%. The upper limit of the preferred 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 general formula (N-1-11) is the following compound.

(In the formula, R ^N1111 and R ^N1112 each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1)).

R ^N1111 is preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, and is preferably ethyl, propyl, butyl, vinyl or 1-propenyl. R ^N1112 is preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, and is preferably an ethoxy group, a propoxy group or a butoxy group. .

The compound represented by general formula (N-1-11) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they can be used in combination appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content lower will result in higher effects. When emphasis is placed on T _NI , setting the content higher will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

Relative to the total amount of the composition of the present invention, the preferable lower limits of the content of the compound represented by formula (N-1-11) are 5%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferred 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-1-11) is preferably selected from the group consisting of the formula (N-1-11.1) The compound in the compound group represented by formula (N-1-11.14) is preferably a compound represented by formula (N-1-11.1)~(N-1-11.14), and is preferably a compound represented by formula (N-1 -11.2) and compounds represented by 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 content of these compounds is relative to the total amount of the composition of the present invention. The lower limit values are 5%, 10%, 13%, 15%, 17% and 20%. The upper limit of the preferred 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 general formula (N-1-12) is the following compound.

(In the formula, R ^N1121 and R ^N1122 each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1)).

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

The compound represented by general formula (N-1-12) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content lower will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

Relative to the total amount of the composition of the present invention, the preferable lower limits of the content of the compound represented by formula (N-1-12) are 5%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferred content 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 general formula (N-1-13) is the following compound.

(In the formula, ^RN1131 and ^RN1132 each independently represent the same meaning as ^RN11 and ^RN12 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, and is preferably an ethyl group, a propyl group or a butyl group. R ^N1132 is preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, and is preferably an ethoxy group, a propoxy group or a butoxy group. .

The compound represented by general formula (N-1-13) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content higher will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

Relative to the total amount of the composition of the present invention, the preferable lower limits of the content of the compound represented by formula (N-1-13) are 5%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferred 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 general formula (N-1-14) is the following compound.

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

The compound represented by the general formula (N-1-14) can be used alone or in combination of two types. the above compounds. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content lower will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

Relative to the total amount of the composition of the present invention, the preferable lower limits of the content of the compound represented by formula (N-1-14) are 5%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferred 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 general formula (N-1-15) is the following compound.

(In the formula, ^RN1151 and ^RN1152 each independently represent the same meaning as ^RN11 and ^RN12 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, and is preferably an ethyl group, a propyl group or a butyl group. R ^N1152 is preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, and is preferably an ethoxy group, a propoxy group or a butoxy group. .

The compound represented by general formula (N-1-15) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content higher will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

Relative to the total amount of the composition of the present invention, the preferable lower limits of the content of the compound represented by formula (N-1-15) are 5%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferred 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 general formula (N-1-16) is the following compound.

(In the formula, ^RN1161 and ^RN1162 each independently represent the same meaning as ^RN11 and ^RN12 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, and is preferably an ethyl group, a propyl group or a butyl group. R ^N1162 is preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, and is preferably an ethoxy group, a propoxy group or a butoxy group. .

The compound represented by general formula (N-1-16) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content higher will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

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

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

(In the formula, R ^N1171 and R ^N1172 each independently represent the same meaning as R ^N11 and R ^N12 in 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, and is preferably an ethyl group, a propyl group or a butyl group. R ^N1172 is preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, and is preferably an ethoxy group, a propoxy group or a butoxy group. .

The compound represented by general formula (N-1-17) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content higher will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

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

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

(In the formula, R ^N1181 and R ^N1182 each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1)).

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

The compound represented by general formula (N-1-18) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content higher will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

Relative to the total amount of the composition of the present invention, the preferable lower limits of the content of the compound represented by formula (N-1-18) are 5%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferred 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 the formula (N-1-18.1) to the formula (N-1-18.5), and is preferably a compound represented by the formula The compounds represented by (N-1-18.1) to (N-1-18.3) are preferably compounds represented by formula (N-1-18.2) and formula (N-1-18.3).

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

(In the formula, ^RN1201 and ^RN1202 each independently represent the same meaning as ^RN11 and ^RN12 in the general formula (N-1)).

^RN1201 and ^RN1202 are each independently preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, and are preferably ethyl, propyl or butyl.

The compound represented by general formula (N-1-20) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content higher will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

Relative to the total amount of the composition of the present invention, the compound represented by formula (N-1-20) The lower limits of the preferred content are 5%, 10%, 13%, 15%, 17% and 20%. The upper limit of the preferred 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 general formula (N-1-21) is the following compound.

(In the formula, R ^N1211 and R ^N1212 each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1)).

^RN1211 and ^RN1212 are each independently preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, and are preferably ethyl, propyl or butyl.

The compound represented by general formula (N-1-21) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content higher will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

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

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

(In the formula, R ^N1221 and R ^N1222 each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1)).

^RN1221 and ^RN1222 are each independently preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, and are preferably ethyl, propyl or butyl.

The compound represented by general formula (N-1-22) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When emphasis is placed on improvement of Δε, it is better to set the content higher. When emphasis is placed on solubility at low temperatures, setting the content higher will result in higher effects. When emphasis is placed on T _NI , setting the content higher will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (N-1-21) is 1%, 5%, 10%, 13%, 15%, 17%, 20%. The upper limit of the preferred 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 the formula (N-1-22.1) to the formula (N-1-22.12), and is preferably a compound represented by the formula The compounds represented by (N-1-22.1)~(N-1-22.5) are preferably compounds represented by formulas (N-1-22.1)~(N-1-22.4).

By adjusting the above content, when a liquid crystal display element is produced using the liquid crystal composition of the present invention, the liquid crystal composition of the present invention preferably contains one or more compounds represented by the general formula (L). The compound represented by the general formula (L) corresponds to a compound with approximately neutral dielectric properties (the value of Δε is -2 to 2). Therefore, the number of polar groups such as halogen contained in the molecule is preferably 2 or less, preferably 1 or less, and preferably none.

(In the formula, R ^L1 and R ^L2 each independently represent an alkyl group with 1 to 8 carbon atoms. One or more than two non-adjacent -CH ₂ - in the alkyl group can be independently -CH=CH -, -C≡C-, -O-, -CO-, -COO- or -OCO- substitution, n ^L1 represents 0, 1, 2 or 3, A ^L1 , A ^L2 and A ^L3 independently represent selected from A group in the group consisting of the following groups (a) to (c), (a) 1,4-cyclohexylene group (one -CH ₂ - present in the group or two or more non-adjacent -CH ₂ - may be substituted by -O-), (b) 1,4-phenylene group (one -CH= present in this group or two or more non-adjacent -CH= may be substituted by -N=), and (c) Naphthalene-2,6-diyl, 1,2,3,4-tetralin-2,6-diyl or decalin-2,6-diyl (present in naphthalene-2,6- One -CH= or two or more non-adjacent -CH= in the diyl or 1,2,3,4-tetralin-2,6-diyl may be substituted by -N=), the above-mentioned group (a ), group (b) and group (c) can be independently substituted by a cyano group, a fluorine atom or a chlorine atom, 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 -, -CF ₂ O-, -CH=NN=CH-, -CH=CH-, -CF= CF- or -C≡C-, when n ^L1 is 2 or 3 and there are plural A ^L2s , these may be the same or different. When n ^L1 is 2 or 3 and there are plural Z ^L2s , these may be the same or different. may be different, except for compounds represented by general formula (N-1)).

The compounds represented by the general formula (L) can be used alone or in combination. The types of compounds that can be combined are not particularly limited, and can be used in appropriate combinations depending on desired properties such as low-temperature solubility, transition temperature, electrical reliability, and birefringence. The type of compound used is, for example, one type in one embodiment of the present invention. Or in other embodiments of the present invention, the number is 2, 3, 4, 5, 6, 7, 8, 9, or 10 or more.

In the composition of the present invention, the content of the compound represented by the general formula (L) needs to be based on the solubility at low temperature, transfer temperature, electrical reliability, birefringence, process adaptability, drip marks, afterimages, and dielectric constant. The required properties such as anisotropy can be appropriately adjusted.

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

When the viscosity of the composition of the present invention is kept low and a composition with a fast response speed is required, it is preferable that the above-mentioned lower limit value is high and the upper limit value is high. Furthermore, when the Tni of the composition of the present invention is to be maintained high and a composition with good temperature stability is required, it is preferable that the above-mentioned lower limit value is high and the upper limit value is high. In addition, when the dielectric constant anisotropy is to be increased in order to keep the driving voltage low, it is preferable that the above-mentioned lower limit value is low and the upper limit value is low.

When reliability is important, it is preferable that both R ^L1 and R ^L2 be alkyl groups. When reducing the volatility of the compound is important, it is preferable that they are alkoxy groups. When reducing viscosity is important, it is preferable that at least one of them is an alkenyl group.

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

烷等飽和環結構時，較佳為直鏈狀的碳原子數1~5的烷基、直鏈狀的碳原子數1~4的烷氧基及直鏈狀的碳原子數2~5的烯基。為了使向列相穩定化，碳原子存在時，氧原子的合計較佳為5以下，較佳為直鏈狀。 Regarding R ^L1 and R ^L2 , when the ring structure to which they are bonded is a phenyl group (aromatic), it is preferably a linear alkyl group with 1 to 5 carbon atoms, or a linear alkyl group with 1 to 5 carbon atoms. 4 alkoxy group and alkenyl group with 4 to 5 carbon atoms, when the ring structure to which they are bonded is cyclohexane, pyran and di

In the case of a saturated ring structure such as an alkane, a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkyl group having 2 to 5 carbon atoms are preferred. alkenyl. In order to stabilize the nematic phase, when carbon atoms are present, the total number of oxygen atoms is preferably 5 or less, and a linear chain is preferred.

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

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

Regarding A ^L1 , A ^L2 and A ^L3 , aromatic is preferred when Δn is required to be increased, aliphatic is preferred in order to improve response speed, and trans-1,4-cyclohexylene is preferred independently of each other. , 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]octyl, piperidin-1,4-diyl, naphthalene-2,6-diyl, decalin-2,6-diyl base or 1,2,3,4-tetralin-2,6-diyl, preferably 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 key is preferred.

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

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

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

(In the formula, R ^L11 and R ^LL2 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L)).

R ^L11 and R ^L12 are preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms. .

The compound represented by the general formula (L-1) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, depending on their solubility at low temperatures and transfer temperature. The required properties such as strength, electrical reliability, birefringence, etc. are suitable for combined use. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

The lower limit of the preferred content is 1%, 2%, 3%, 5%, 7%, 10%, 15%, 20%, 25%, 30%, 35% relative to the total amount of the composition of the present invention. , 40%, 45%, 50%, 55%. The upper limit of the preferred content is 95%, 90%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, 50%, 45% relative to the total amount of the composition of the present invention. , 40%, 35%, 30%, 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 preferable that the above-mentioned lower limit value is high and the upper limit value is high. Furthermore, when the Tni of the composition of the present invention is kept high and a composition with good temperature stability is required, it is preferable that the above-mentioned lower limit value is in the middle and the upper limit value is in the middle. In addition, when the dielectric constant anisotropy is to be increased in order to keep the driving voltage low, it is preferable that the above-mentioned lower limit value is low and the upper limit value is low.

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

(R ^L12 in the formula has the same meaning as in general formula (L-1)).

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

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

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

(R ^L12 in the formula has the same meaning as in general formula (L-1)).

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-1-2) is 1%, 5%, 10%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 35%. The upper limit of the preferred content is 60%, 55%, 50%, 45%, 42%, 40%, 38%, 35%, 33%, and 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 is preferably a compound represented by the formula (L-1-2.2) to compounds represented by formula (L-1-2.4). In particular, the compound represented by formula (L-1-2.2) is preferable because it particularly improves the response speed of the composition of the present invention. In addition, when high Tni is required rather than response speed, it is preferable to use a compound represented by formula (L-1-2.3) or formula (L-1-2.4). In order to achieve good solubility at low temperatures, the content of the compound represented by formula (L-1-2.3) and formula (L-1-2.4) is preferably 30% or more.

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

The preferable 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) is 10%, relative to the total amount of the composition of the present invention. 15%, 20%, 25%, 27%, 30%, 35%, 40%. The upper limit of the preferred content is 60%, 55%, 50%, 45%, 43%, 40%, 38%, 35%, 32%, 30%, 27% relative to the total amount of the composition of the present invention. ,25%,22%.

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

(In the formula, R ^L13 and R ^L14 each independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms).

R ^L13 and R ^L14 are preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms. .

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

Furthermore, the compound represented by the general formula (L-1-3) is preferably a compound selected from the group of compounds represented by the formula (L-1-3.1) to the formula (L-1-3.13), and is preferably a compound represented by the formula (L-1-3.1), a compound represented by formula (L-1-3.3) or formula (L-1-3.4). In particular, the compound represented by formula (L-1-3.1) is preferable because it particularly improves the response speed of the composition of the present invention. In addition, when higher Tni is required than response speed, it is better to Compounds represented by formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11) and formula (L-1-3.12) are used. In order to achieve good solubility at low temperatures, 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-1-3.12) It is worse to set it to 20% or more.

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-1-3.1) is 1%, 2%, 3%, 5%, 7%, or 10% , 13%, 15%, 18%, 20%. Preferably, the upper limit of the content is 20%, 17%, 15%, 13%, 10%, 8%, 7%, or 6% relative to the total amount of the composition of the present invention.

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

(In the formula, R ^L15 and R ^L16 each independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms).

R ^L15 and R ^L16 are preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms. .

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

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

Furthermore, the compounds represented by general formulas (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). The compound in is preferably a compound represented by formula (L-1-4.2) or formula (L-1-5.2).

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

Preferably, it will be selected from formula (L-1-1.3), formula (L-1-2.2), formula (L-1-3.1), formula (L- 1-3.3), a combination of two or more compounds represented by formula (L-1-3.4), formula (L-1-3.11) and formula (L-1-3.12), preferably selected from 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 - A combination of two or more compounds among the compounds represented by -4.2), 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%, the upper limit is relative to the composition of the present invention The total amount is 80%, 70%, 60%, 50%, 45%, 40%, 37%, 35%, 33%, 30%, 28%, 25%, 23%, 20%. When emphasis is placed on the reliability of the composition, it is preferred to use 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). As for the combination of compounds, when emphasis is placed on the response speed of the composition, it is preferable 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).

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

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

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

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

(In the formula, R ^L21 and R ^L22 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L)).

R ^L21 is preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms. R ^L22 is preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms or Alkoxy group with 1 to 4 carbon atoms.

The compound represented by general formula (L-2) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

When focusing on solubility at low temperatures, setting the content higher will result in higher effects. On the other hand, when focusing on response speed, setting the content lower will result in higher effects. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

The preferable lower limits of the content of the compound represented by formula (L-2) are 1%, 2%, 3%, 5%, 7%, and 10% relative to the total amount of the composition of the present invention. The upper limit of the preferred content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, and 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 is preferably a compound represented by formula (L-2.1), Compounds represented by formula (L-2.3), formula (L-2.4) and formula (L-2.6).

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

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

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

The compound represented by the general formula (L-3) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

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

When a high birefringence is to be obtained, setting the content to a high value will provide a high effect. On the contrary, when a high Tni is important, setting the content to a low value will result in a high effect. Furthermore, when improving drip mark and image sticking characteristics, it is preferable to set the content range to be in the middle.

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

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

(In the formula, R ^L41 and R ^L42 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L)).

R ^L41 is preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms. R ^L42 is preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or Alkoxy group with 1 to 4 carbon atoms).

The compound represented by the general formula (L-4) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-4) needs to be based on the solubility at low temperature, transfer temperature, electrical reliability, birefringence, process adaptability, drip marks, afterimages, medium The required properties such as electrical constant anisotropy are appropriately adjusted.

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

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

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

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

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

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

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

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

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

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

(In the formula, R ^L51 and R ^L52 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L)).

R ^L51 is preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms. R ^L52 is preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or Alkoxy group with 1 to 4 carbon atoms.

The compound represented by the general formula (L-5) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-5) needs to be based on the solubility at low temperature, transfer temperature, electrical reliability, birefringence, process adaptability, drip marks, afterimages, medium The required properties such as electrical constant anisotropy are appropriately adjusted.

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

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

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

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

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

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

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

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

(In the formula, R ^L61 and R ^L62 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L), and X ^L61 and X ^L62 each independently represent a hydrogen atom or a fluorine atom).

R ^L61 and R ^L62 are each independently preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, and preferably one of X ^L61 and X ^L62 is a fluorine atom and the other is a fluorine atom is a hydrogen atom.

The compound represented by general formula (L-6) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and can be combined appropriately depending on required properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, or 5 or more types in one embodiment of the present invention.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-6) is 1%, 2%, 3%, 5%, 7%, 10%, 14% , 16%, 20%, 23%, 26%, 30%, 35%, 40%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content of the compound represented by formula (L-6) is 50%, 40%, 35%, 30%, 20%, 15%, 10% ,5%. When the focus is on increasing △n, it is preferable to increase the content. When the focus is on precipitation at low temperatures, it is preferable to have a small content.

The compound represented by 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 it is preferable to contain 1 to 3 types of these compounds, and more preferably 1 to 4 types of these compounds. In addition, the selected compound has a broad molecular weight distribution and is effective for solubility. Therefore, for example, it is preferable to select one compound from the compounds represented by the formula (L-6.1) or (L-6.2), or a compound represented by the formula (L-6.4). ) or (L-6.5), select one from the compounds represented by formula (L-6.6) or formula (L-6.7), select one from the compounds represented by formula (L-6.8) or (L- 6.9) Select one compound from the compounds shown and combine them appropriately. Among them, compounds represented by formula (L-6.1), formula (L-6.3), formula (L-6.4), formula (L-6.6) and formula (L-6.9) are preferred.

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), and among them, the compound represented by the formula (L-6.11) is preferable. .

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

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

(In the formula, R ^L71 and R ^L72 respectively independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L), A ^L71 and A ^L72 respectively independently represent the same meanings as A L2 and R ^L2 in the general formula (L) A ^L3 has the same meaning, the hydrogen atoms on A ^L71 and A ^L72 can be independently replaced by fluorine atoms, Z ^L71 has the same meaning as Z ^L2 in the general formula (L), X ^L71 and X ^L72 independently represent fluorine atom or hydrogen atom).

In the formula, R ^L71 and R ^L72 are each independently preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms. A ^L71 and A ^L72 They are each independently preferably 1,4-cyclohexylene or 1,4-phenylene. The hydrogen atoms on A ^L71 and A ^L72 can be independently substituted by fluorine atoms. Z ^L71 is preferably a single bond or -COO. -, preferably a single bond, and X ^L71 and X ^L72 are preferably hydrogen atoms.

The types of compounds that can be combined are not particularly limited, and can be combined according to required properties such as solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. The types of compounds used are, for example, 1 type, 2 types, 3 types, or 4 types in one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-7) needs to be based on the solubility at low temperature, transfer temperature, electrical reliability, birefringence, process adaptability, drip marks, afterimages, medium The required properties such as electrical constant anisotropy are appropriately adjusted.

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

When the composition of the present invention is desired to have a high Tni embodiment, it is preferable to increase the content of the compound represented by formula (L-7). When a low viscosity embodiment is desired, it is preferable to make the content smaller.

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.1) to formula (L-7.4), and more preferably a compound represented by 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- The compound represented by 7.13) 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). Preferable is a compound represented by formula (L-7.21).

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

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

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

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

Relative to the total amount of the composition of the present invention, general formula (i), general formula (ii), general formulas (L-1) to (L-7) and (M-1) to (M-8) represent The lower limit of the preferred total content of the compounds is 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%. The upper limits of the preferred content are 100%, 99%, 98%, and 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 peracid (-CO-OO-) structure in the molecule.

When attaching importance to the reliability and long-term stability of the composition, the content of the compound having a carbonyl group is preferably 5% or less, more preferably 3% or less, and still more preferably 5% or less based on the total mass of the composition. 1% or less, preferably substantially no content.

When emphasis is placed on stability by UV irradiation, the content of the chlorine atom-substituted compound is preferably 15% or less, preferably 10% or less, and preferably 8% relative to the total mass of the composition. % or less, more preferably 5% or less, more preferably 3% or less, and still more preferably substantially no content.

The content of compounds whose ring structures in the molecule are all 6-membered rings is preferably increased, and the content of compounds whose cyclic structures are all 6-membered rings in the molecule is preferably set to 80% or more relative to the total mass of the aforementioned composition. More preferably, it is 90% or more, still more preferably, it is 95% or more, and most preferably, the composition is substantially only composed of compounds in which all the ring structures in the molecule are 6-membered rings.

In order to suppress deterioration due to oxidation of the composition, the content of the compound having a cyclohexenylene group as a ring structure is preferably reduced. The content of the compound having a cyclohexenylene group is preferably The content is 10% or less, preferably 8% or less, more preferably 5% or less, preferably 3% or less, and still more preferably does not contain it substantially.

When emphasis is placed on improvement of viscosity and improvement of Tni, it is preferable to reduce the content of compounds having 2-methylbenzene-1,4-diyl in which a hydrogen atom can be substituted by a halogen in the molecule, and the compound having the aforementioned 2-methyl group in the molecule The content of the benzene-1,4-diyl compound is preferably 10% or less, more preferably 8% or less, more preferably 5% or less, based on the total mass of the composition. It is 3% or less, and it is more preferable that it does not contain substantially.

The term "substantially not contained" in the present invention means that it does not contain substances other than substances that are not included intentionally.

When the compound contained in the composition of the first embodiment of the present invention has an alkenyl group as a side chain, when the alkenyl group is bonded to cyclohexane, the number of carbon atoms of the alkenyl group is preferably 2 to 5, as mentioned above 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. As its lower limit, 10 is preferred, 10.5 is preferred, 11 is preferred, 11.5 is preferred, and 11.5 is preferred. 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 14.3, preferably The best is 14.5, the better is 14.8, the better is 15, the better is 15.3, the better is 15.5, the better is 15.8, the better is 16, the better is 16.3, the better is 16.5, the better is 16.8, the better 17 is preferred, 17.3 is preferred, 17.5 is preferred, 17.8 is preferred, 18 is preferred, and as the upper limit thereof, 25 is preferred, 24.5 is preferred, 24 is preferred, 23.5 is preferred, 23 is preferred, 22.8 is preferred, 22.5 is preferred, 22.3 is preferred, 22 is preferred, 21.8 is preferred, 21.5 is preferred, 21.3 is preferred, 21 is preferred, 20.8 is preferred, Better is 20.5, Better is 20.3, Better is 20, Better is 19.8, Better is 19.5, Better is 19.3, Better is 19, Better is 18.8, Better is 18.5, Better is 18.3, Preferably it is 18, preferably 17.8, preferably 17.5, preferably 17.3, preferably 17. When emphasis is placed on reducing power consumption, it is effective to suppress the amount of light from the backlight. It is preferable to increase the light transmittance of the liquid crystal display element, so it is preferable to set the value of K _AVG low. When emphasis is placed on improving response speed, it is better to set the value of K _AVG higher.

As the polymerizable compound of the present invention, a compound represented by the following general formula (P) is preferred.

(In the above general formula (P), R ^p1 represents a hydrogen atom, a fluorine atom, a cyano group, an alkyl group with 1 to 15 carbon atoms or -Sp ^p2 -P ^p2 , and one of the alkyl groups or 2 non-adjacent More than one -CH ₂ - can be independently substituted by -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-, and 1 or 2 of the alkyl groups The above hydrogen atoms may be independently substituted by a cyano group, a fluorine atom or a chlorine atom, and P ^p1 and P ^p2 each independently represent any one of the general formulas (P ^p1 -1) to (P ^p1 -9),

(In the formula, R ^p11 and R ^p12 each independently represent a hydrogen atom, an alkyl group with 1 to 5 carbon atoms or a halogenated alkyl group with 1 to 5 carbon atoms, and W ^p11 represents a single bond, -O-, -COO- or methylene, t ^p11 represents 0, 1 or 2. When there are multiple R ^p11 , R ^p12 , W ^p11 and/or t ^p11 in the molecule, these 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- (in the formula, R ^ZP1 independently represents a hydrogen atom or an alkyl group with 1 to 4 carbon atoms. When there are multiple R ^ZP1 in the molecule, they may be the same or different), A ^p1 , A ^p2 and A ^p3 each independently represent a group selected from the group consisting of the following group ( ^ap ) ~ group (c ^p ), ( ^ap ) 1,4-cyclohexylene group (one of the groups present in the group) -CH ₂ - or two or more non-adjacent -CH ₂ - may be substituted by -O-), (b ^p )1,4-phenylene group (one -CH= or non-adjacent one present in this group More than 2 -CH= may be substituted by -N=), and (c ^p )naphthalene-2,6-diyl, 1,2,3,4-tetralin-2,6-diyl, decalin -2,6-diyl, phenanthrene-2,7-diyl or anthracene-2,6-diyl (one -CH= or more than two non-adjacent -CH= present in these groups can be -N=substituted), one or more hydrogen atoms present in the above-mentioned group ( ^ap ), group (b ^p ) and group (c ^p ) can be independently replaced by a halogen atom, a cyano group, a carbon atom Alkyl groups with numbers 1 to 8 or -Sp ^p2 -P ^p2 substituted, one of the alkyl groups or two or more non-adjacent -CH ₂ - can be independently -CH=CH-, -C≡C- , -O-, -CO-, -COO- or -OCO- substitution, m ^p1 represents 0, 1, 2 or 3. When there are multiple Z ^p1 , A ^p2 , Sp ^p2 and/or P ^p2 in the molecule, the etc. may be the same or different. When m ^p1 is 0 and A ^p1 is phenanthrene-2,7-diyl or anthracene-2,6-diyl, A ^p3 represents a single bond.

(Except for compounds represented by general formula (i)).

Moreover, it is preferable that this polymerizable monomer contains 1 type or 2 or more types.

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

P ^p1 and P ^p2 are each independently preferably any one of formulas (P ^p1 -1) to formula (P ^p1 -3), and more preferably (P ^p1 -1).

R ^p11 and R ^p12 are each independently preferably a hydrogen atom or a methyl group.

t ^p11 is preferably 0 or 1.

W ^p11 is preferably a single bond, methylene or ethylidene.

m ^p1 is preferably 0, 1 or 2, more preferably 0 or 1.

Z ^p1 and Z ^p2 are each independently preferably a single bond, -OCH ₂ -, -CH ₂ O-, -CO-, -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-, -CF ₂ -, -CF ₂ O-, -(CH ₂ ) ₂ -COO- , -(CH ₂ ) ₂ -OCO-, -OCO-(CH ₂ ) ₂ -, -CH=CH-COO-, -COO-CH=CH-, -OCOCH=CH-, -COO-(CH ₂ ) ₂ -, -OCF ₂ - or -C≡C-, preferably single bond, -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-, Preferably, only one of them present in the molecule is -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-, all others are single bonds, preferably Only one bond present in the molecule is -OCH ₂ -, -CH ₂ O-, -C ₂ H ₄ -, -COO- or -OCO-, and all the others are single bonds, preferably all single bonds.

In addition, it is preferable that only one of Z ^p1 and Z ^p2 present in the molecule is selected from -CH=CH-COO-, -COO-CH=CH-, -(CH ₂ ) ₂ -COO-, - The bonding groups in the group consisting of (CH ₂ ) ₂ -OCO-, -OCO-(CH ₂ ) ₂ -, -COO-(CH ₂ ) ₂ -, and the others are single bonds.

Sp ^p1 and Sp ^p2 each independently represent a single bond or a spacer group. The spacer group is preferably an alkylene group with 1 to 30 carbon atoms. -CH ₂ - in the alkylene group can be oxygen atoms that are not directly bonded to each other. In the case of -O-, -CO-, -COO-, -OCO-, -CH=CH- or -C≡C-, the hydrogen atom in the alkylene group can be replaced by a halogen atom, preferably A straight-chain alkylene group or single bond with 1 to 10 carbon atoms.

A ^p1 , A ^p2 and A ^p3 are each independently preferably 1,4-phenylene group or 1,4-cyclohexylene group, and preferably 1,4-phenylene group. In order to improve the compatibility with liquid crystal compounds, the 1,4-phenylene group is preferably substituted by 1 fluorine atom, 1 methyl group or 1 methoxy group.

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

Preferable lower limits of the total content of the compounds represented by the general formula (P) are 0.01%, 0.03%, 0.05%, 0.08%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%.

The preferable 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%, 0.5%.

If the content is small, it will be difficult to exhibit the effect of adding the compound represented by the general formula (P), and problems such as weak alignment binding force of the liquid crystal composition or weakening with time may occur. If it is too large, the amount remaining after curing will increase. Problems such as time-consuming curing and reduced reliability of the liquid crystal may occur. Therefore, the content is set considering the balance of these.

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

(In the formula, P ^p11 , P ^p12 , Sp ^p11 and Sp ^p12 have the same meaning as P ^p11 , P ^p12 , Sp ^p11 and Sp ^p12 in the general formula (P-1)).

Preferable examples of the compound represented by the general formula (P) of the present invention include polymerizable compounds represented by the following formulas (P-2-1) to formula (P-2-12).

(In the formula, P ^p21 , P ^p22 , Sp ^p21 and Sp ^p22 have the same meaning as P ^p21 , P ^p22 , Sp ^p21 and Sp ^p22 in the general formula (P-2)).

Preferable examples of the compound represented by the general formula (P) of the present invention include polymerizable compounds represented by the following formulas (P-3-1) to formula (P-3-15).

(In the formula, P ^p31 , P ^p32 , Sp ^p31 and Sp ^p32 have the same meanings as P ^p31 , P ^p32 , Sp ^p31 and Sp ^p32 in the general formula (P-3)).

Preferable examples of the compound represented by the general formula (P) of the present invention include polymerizable compounds represented by the following formulas (P-4-1) to formula (P-4-15).

(In the formula, P ^p41 , P ^p42 , Sp ^p41 and Sp ^p42 have the same meaning as P ^p41 , P ^p42 , Sp ^p41 and Sp ^p42 in the general formula (P-4)).

The liquid crystal composition contains liquid crystal molecules and an alignment aid that has a function of spontaneously aligning the liquid crystal molecules and has a polar group.

((alignment aid))

Alignment aids (spontaneous alignment compounds) have the following functions: members (electrodes (such as ITO)) and substrates (such as glass substrates, acrylic substrates, transparent substrates, flexible substrates) that are in direct contact with the liquid crystal layer containing the liquid crystal composition etc.), resin layers (such as color filters, alignment films, outer coatings, etc.), insulating films (such as inorganic material films, SiNx, etc.)) interact to induce vertical alignment or homogeneous alignment of liquid crystal molecules contained in the liquid crystal layer. .

The alignment aid preferably contains a polymerizable group for polymerization, a mesogen group similar to a liquid crystal molecule, an adsorption group (polar group) capable of interacting with a member in direct contact with the liquid crystal layer, and An alignment inducing group that induces the alignment of liquid crystal molecules.

The adsorption group and the alignment inducing group are bonded to the liquid crystal original group, and the polymerizable group is preferably directly Or, if necessary, it may be substituted with a mesogen group, an adsorption group, and an alignment inducing group via a spacer group. It is particularly preferable that the polymerizable group is replaced by the mesogen group in a state of being incorporated into the adsorbed group.

In the following, the * on the left and the * on the right in the chemical formula represent bonding bonds.

"Alignment inducing group"

The alignment inducing group has the function of inducing alignment of liquid crystal molecules, and is preferably a group represented by the following general formula (AK).

R ^AK1- * (AK)

In the formula, R ^AK1 represents a linear or branched alkyl group having 1 to 20 carbon atoms. Among them, one or more -CH ₂ - in the alkyl group can be independently replaced by -CH=CH-, -C≡C-, -O-, -CO- when the oxygen atom is not directly bonded. , -COO- or -OCO- substitution, one or more hydrogen atoms in the alkyl group can be independently substituted by halogen groups.

R ^AK1 preferably represents a linear or branched alkyl group having 1 to 20 carbon atoms, more preferably represents a linear alkyl group having 1 to 20 carbon atoms, and even more preferably represents a linear alkyl group. Alkyl group with 1 to 8 carbon atoms.

In addition, one or two or more non-adjacent -CH ₂ - in the alkyl group may be independently -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO. -replace.

Furthermore, the hydrogen atom in the alkyl group may be substituted by a fluorine atom or a chlorine atom, and may be substituted by a fluorine atom.

From the viewpoint of imparting so-called amphiphilicity to the liquid crystal layer to the alignment aid, the above-mentioned alignment inducing group is preferably bonded to the mesogen group.

"Polymerizable group"

The polymerizable group is preferably represented by P ^AP1 -Sp ^AP1 -.

P ^AP1 is preferably a group selected from the group represented by the following general formula (AP-1) to general formula (AP-9).

In the formula, R ^AP1 and R ^AP2 each independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a halogenated alkyl group having 1 to 10 carbon atoms. Among them, one or more -CH ₂ - in the alkyl group can be substituted by -O- or -CO-, and one or more hydrogen atoms in the alkyl group can be independently substituted by a halogen atom or a hydroxyl group. .

W ^AP1 represents a single bond, -O-, -COO- or -CH ₂ -.

t ^AP1 represents 0, 1 or 2.

P ^AP1 is preferably a group represented by the following general formula (AP-1) to general formula (AP-7), more preferably a group represented by the following general formula (AP-1) or general formula (AP-2) group, more preferably general formula (AP-1).

Sp ^AP1 preferably represents a single bond or a linear or branched alkylene group having 1 to 20 carbon atoms, more preferably represents a single bond or a linear or linear alkylene group having 1 to 20 carbon atoms, and further Preferably, it represents a single bond or a linear alkylene group having 2 to 10 carbon atoms.

In addition, in Sp ^AP1 , one or two or more non-adjacent -CH ₂ - in the alkylene group can be independently -CH=CH-, -C≡C-, -O-, -CO-, - COO- or -OCO-substitution.

In the alignment aid, the number of polymerizable groups (P ^AP1 -Sp ^AP1 -) is preferably 1 or more and 5 or less, more preferably 1 or more and 4 or less, further preferably 2 or more and 4 or less, especially preferably 2 or 3, preferably 2.

The hydrogen atom in P ^AP1 -Sp ^AP1 - may be substituted by a polymerizable group, an adsorbing group and/or an alignment inducing group.

The polymerizable group (P ^AP1 -Sp ^AP1 -) can be bonded to a polymerizable group, a mesogen group, an adsorption group and/or an alignment inducing group.

In addition, the polymerizable group (P ^AP1 -Sp ^AP1 -) is preferably bonded to a mesogen group, an adsorption group or an alignment inducing group, and more preferably is bonded to a mesogen group or an adsorption group.

Furthermore, when there are a plurality of P ^AP1 and/or Sp ^AP1 - in the molecule, they may be the same or different from each other.

"Liquid crystal base"

A mesogen group means a group having a rigid part, such as a group having more than one cyclic group, preferably a group having 2 to 4 cyclic groups, and more preferably a group having 3 to 4 cyclic groups. Furthermore, if necessary, the cyclic group can be bonded with a bonding group. The mesogen group preferably has a similar skeleton to the liquid crystal molecules (liquid crystal compounds) used in the liquid crystal layer.

Furthermore, in this specification, "cyclic group" means a group of atoms whose constituent atoms are bonded to form a ring, including carbocyclic rings, heterocyclic rings, saturated or unsaturated ring structures, monocyclic rings, bicyclic structures, and polycyclic structures. , aromatic, non-aromatic, etc.

In addition, the cyclic group may contain at least one heteroatom, and may be substituted by at least one substituent (halogen group, polymerizable group, organic group (alkyl group, alkoxy group, aryl group, etc.)). When the cyclic group is a monocyclic ring, the mesogen group preferably contains two or more monocyclic rings.

The mesogen group is preferably represented by general formula (AL), for example.

In the formula, Z ^AL1 represents a single bond, -CH=CH-, -CF=CF-, -C≡C-, -COO-, -OCO-, -OCOO-, -CF ₂ O-, -OCF ₂ -, -CH=CHCOO-, -OCOCH=CH-, -CH ₂ -CH ₂ COO-, -OCOCH ₂ -CH ₂ -, -CH=C(CH ₃ )COO-, -OCOC(CH ₃ )=CH-, -CH ₂ -CH(CH ₃ )COO-, -OCOCH(CH ₃ )-CH ₂ -, -OCH ₂ CH ₂ O- or an alkylene group having 1 to 20 carbon atoms. Among them, one or two or more non-adjacent -CH ₂ - groups in the alkylene group may be substituted by -O-, -COO- or -OCO-.

A ^AL1 and A ^AL2 each independently represent a divalent cyclic group.

One or more hydrogen atoms in Z ^AL1 , A ^AL1 and A ^AL2 may be independently substituted by a halogen group, an adsorption group, P ^AP1 -Sp ^AP1 - or a monovalent organic group.

Furthermore, when there are multiple Z ^AL1 and A ^AL1 in the molecule, they may be the same or different from each other.

m ^AL1 represents an integer from 1 to 5.

In the general formula (AL), Z ^AL1 is preferably a single bond or an alkylene group having 2 to 20 carbon atoms, more preferably a single bond or an alkylene group having 2 to 10 carbon atoms, and further preferably a single bond, -(CH ₂ ) ₂ - or -(CH ₂ ) ₄ -. One or two or more non-adjacent -CH ₂ - groups in the alkylene group may be substituted by -O-, -COO- or -OCO-.

Furthermore, when the purpose is to improve the linearity of the rod-shaped molecule, Z ^AL1 is preferably a form in which rings are directly bonded to each other, that is, a single bond, and an even number of atoms directly bonding the rings to the rings. For example, in the case of -CH ₂ -CH ₂ COO-, the number of atoms directly bonding the rings is four.

烷-2,5-二基、四氫噻喃-2,5-二基、噻吩-2,5-二基、1,4-雙環(2,2,2)伸辛基、十氫萘-2,6-二基、吡啶-2,5-二基、嘧啶-2,5-二基、吡

-2,5-二基、噻吩-2,5-二基-、1,2,3,4-四氫萘-2,6-二基、2,6-伸萘基、菲-2,7-二基、9,10-二氫菲-2,7-二基、1,2,3,4,4a,9,10a-八氫菲-2,7-二基、1,4-伸萘基、苯并[1,2-b：4,5-b‘]二噻吩-2,6-二基、苯并[1,2-b：4,5-b‘]二硒吩-2,6-二基、[1]苯并噻吩并[3,2-b]噻吩-2,7-二基([1]benzothieno[3,2-b]thiophene-2,7-diyl)、[1]苯并硒吩并[3,2-b]硒吩-2,7-二基及茀-2,7-二基組成的群中的1種，更佳為1,4-伸苯基、1,4-伸環己基、2,6-伸萘基或菲-2,7-二基，進而較佳為1,4-伸苯基或1,4-伸環己基。 In the general formula (AL), A ^AL1 and A ^AL2 each independently represent a divalent cyclic group. The divalent cyclic group is preferably selected from the group consisting of 1,4-phenylene group, 1,4-cyclohexylene group, 1,4-cyclohexylene group, tetrahydropyran-2,5-diyl, 1,3-two

Alk-2,5-diyl, tetrahydrothiopyran-2,5-diyl, thiophene-2,5-diyl, 1,4-bicyclo(2,2,2)octyl, decalin- 2,6-diyl, pyridine-2,5-diyl, pyrimidine-2,5-diyl, pyridine

-2,5-diyl, thiophene-2,5-diyl-, 1,2,3,4-tetralin-2,6-diyl, 2,6-naphthylene, phenanthrene-2,7 -Diyl, 9,10-dihydrophenanthrene-2,7-diyl, 1,2,3,4,4a,9,10a-octahydrophenanthrene-2,7-diyl, 1,4-phenylene base, benzo[1,2-b:4,5-b']dithien-2,6-diyl, benzo[1,2-b:4,5-b']diselenophene-2, 6-diyl, [1]benzothieno[3,2-b]thiophene-2,7-diyl ([1]benzothieno[3,2-b]thiophene-2,7-diyl), [1] ] One of the group consisting of benzoseleneno[3,2-b]selenophene-2,7-diyl and fluorine-2,7-diyl, more preferably 1,4-phenyl, 1,4-cyclohexylene group, 2,6-naphthylene group or phenanthrene-2,7-diyl group, more preferably 1,4-phenylene group or 1,4-cyclohexylene group.

Furthermore, these groups may be unsubstituted or substituted with substituents. As this substituent, a fluorine atom or an alkyl group having 1 to 8 carbon atoms is preferred. Furthermore, the alkyl group may be substituted by a fluorine atom or a hydroxyl group.

In addition, one or more hydrogen atoms in the cyclic group may be substituted by a halogen group, an adsorbing group, P ^AP1 -Sp ^AP1 - or a monovalent organic group.

In the general formula (AL), a monovalent organic group is a group that constitutes a chemical structure of an organic compound by taking the form of a monovalent group, and means an atomic group obtained by removing one hydrogen atom from the organic compound.

Examples of the monovalent organic group include an alkyl group having 1 to 15 carbon atoms, an alkenyl group having 2 to 15 carbon atoms, an alkoxy group having 1 to 14 carbon atoms, and an alkenyl group having 2 to 15 carbon atoms. group, etc., preferably an alkyl group with 1 to 15 carbon atoms or an alkoxy group with 1 to 14 carbon atoms, more preferably an alkyl group with 1 to 8 carbon atoms or an alkoxy group with 1 to 8 carbon atoms. , more preferably an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, particularly preferably an alkyl group having 1 to 3 carbon atoms or an alkoxy group having 1 to 2 carbon atoms, Most preferably, it is an alkyl group having 1 or 2 carbon atoms or an alkoxy group having 1 carbon atom.

In addition, one or two or more non-adjacent -CH ₂ - groups among the above-mentioned alkyl group, alkenyl group, alkoxy group and alkenoxy group may be substituted by -O-, -COO- or -OCO-. Furthermore, the above-mentioned monovalent organic group may have a function as an alignment inducing group to be described later.

In the above general formula (AL), m ^AL1 is preferably an integer of 1 to 4, more preferably an integer of 1 to 3, and still more preferably 2 or 3.

Preferred forms of the mesogen group include the following formulas (me-1) to (me-44).

The general formula (AL) is a structure in which two hydrogen atoms are detached from these compounds.

In the equations (me-1) ~ (me-44), one or more hydrogen atoms in the cyclohexane ring, benzene ring or naphthalene ring can be independently replaced by a halogen group, P ^AP1 -Sp ^AP1 - , monovalent organic group (for example, alkyl group with 1 to 15 carbon atoms, alkoxy group with 1 to 14 carbon atoms), adsorption group or alignment inducing group substitution.

Among the above-mentioned liquid crystal original groups, preferred forms are formulas (me-8)~(me-44), and more preferred forms are formulas (me-8)~(me-10), formulas (me-12)~( me-18), formula (me-22)~(me-24), formula (me-26)~(me-27) and formula (me-29)~(me-44), and the better form is Formula (me-12), (me-15)~(me-16), (me-22)~(me-24), (me-29), (me-34), (me-36)~(me-37), (me-42)~(me-44).

Among the above-mentioned mesogens, a particularly preferred form is the following general formula (AL-1) or (AL-2), and the most optimal form is the following general formula (AL-1).

In ^the formula, X ^AL101 ~ X ^AL118 and ^{X AL201 ~}

Ring A ^AL11 , ring A ^AL12 and ring A ^AL21 each independently represent a cyclohexane ring or a benzene ring.

Any one or more of X ^AL101 ~ X ^AL118 and X ^AL201 ~ X ^AL214 may be substituted by adsorption groups.

Any one or more of X ^AL101 to X ^AL118 and X ^AL201 to X ^AL214 may be substituted by an alignment inducing group.

The adsorption group and the alignment inducing group can be replaced by P ^AP1 -Sp ^AP1 -.

Regarding general formula (AL-1) or general formula (AL-2), there are one or more kinds of P ^AP1 -Sp ^AP1 - in the molecule.

In the general formula (AL-1), X ^AL101 is preferably an alignment inducing group.

In the general formula ⁽ AL-1), it is preferable that at least one of X ^AL109 , ^{X AL110} and X ^AL111 is an adsorption group, more preferably both X ^AL109 and It is better to use X ^AL110 as an adsorption base.

In ^the general formula ⁽ AL-1), ^it is preferred that ^at least ^one of X ^AL109 , Both or one of X ^AL111 is P ^AP1 -Sp ^AP1 -.

In the general formula (AL-1), one or more of X ^AL104 ~ X ^{AL108 and} X ^AL112 ~ an alkoxy group or a halogen group, more preferably an alkyl group having 1 to 3 carbon atoms or a fluorine atom. In particular, X ^AL105 , X ^AL106 or X ^AL107 are each independently preferably an alkyl group having 1 to 3 carbon atoms or a fluorine atom.

In the general formula (AL-2), X ^AL201 is preferably an alignment inducing group.

In the general formula ⁽ AL-2), it is preferable that at least one of X ^AL207 , ^{X AL208} and X ^AL209 is an adsorption group, more preferably both X ^AL207 and It is better to use X ^AL208 as an adsorption base.

In ^the general formula ⁽ AL ^- 2), ^it is preferred that at least ^one of X ^AL207 , Both or one of X ^AL209 is P ^AP1 -Sp ^AP1 -.

In ^the general formula (AL-2), one or more of X ^AL202 ~ X ^AL206 and X ^AL210 ~ an alkoxy group or a halogen group, more preferably an alkyl group having 1 to 3 carbon atoms or a fluorine atom. In particular, X ^AL204 , X ^AL205 or X ^AL206 are each independently preferably an alkyl group having 1 to 3 carbon atoms or a fluorine atom.

"Adsorption base"

The adsorption group is a group that has a function of adsorbing an adsorption medium, which is a layer in contact with a liquid crystal composition such as a substrate, a film, and an electrode.

Adsorption is generally divided into chemical adsorption, which forms a chemical bond (covalent bond, ionic bond, or metallic bond) between the adsorption medium and the adsorbed substance, and physical adsorption other than chemical adsorption. In this specification, adsorption may be either chemical adsorption or physical adsorption, and physical adsorption is preferred. Therefore, the adsorption group is preferably one capable of physical adsorption with the adsorption medium, and more preferably one capable of adsorbing the adsorption medium through intermolecular force. Adsorption media bonded base.

Examples of the method of bonding to the adsorption medium through intermolecular force include methods utilizing interactions such as permanent dipole, permanent quadrupole, dispersion force, charge transfer force, or hydrogen bonding.

As a preferable form of the adsorption group, a form capable of bonding to the adsorption medium using hydrogen bonding can be cited. In this case, the adsorption group may function as either a donor or an acceptor of protons that mediate hydrogen bonds, or may function as both.

The adsorption group is preferably a group including a polar element (hereinafter, the "adsorption group" will also be described as "polar group") having an atomic group in which a carbon atom and a heteroatom are bonded. In this specification, a polar element means an atomic group in which a carbon atom and a heteroatom are directly bonded.

The hetero atom is preferably at least one selected from the group consisting of N, O, S, P, B, and Si, more preferably at least one selected from the group consisting of N, O, and S, and still more preferably Preferably, at least one species is selected from the group consisting of N and O, and O is particularly preferred.

In addition, the valence of the polar element in the alignment aid is not particularly limited, such as monovalent, divalent, trivalent, etc., and the number of polar elements in the adsorption group is not particularly limited either.

The alignment aid preferably has 1 to 8 adsorption groups in one molecule, more preferably has 1 to 4 adsorption groups, and further preferably has 1 to 3 adsorption groups.

Furthermore, the polymerizable group and the alignment inducing group are excluded from the adsorbing group, but the structure in which the hydrogen atom in the adsorbing group is replaced by P ^AP1 -Sp ^AP1 - and the structure in which the hydrogen atom in P ^AP1 -Sp ^AP1 - is replaced by -OH Contained in adsorption base.

The adsorption base contains one or more polar elements and is roughly divided into ring base type and chain base type.

The cyclic base type is a form in which the structure includes a cyclic group having a cyclic structure containing a polar element, and the chain base type is a form in which the structure does not include a cyclic group having a cyclic structure containing a polar element.

The chain group type has a polar element in a linear or branched chain group, and a part of it may have a cyclic structure that does not contain a polar element.

A cyclic-based adsorption group means a form having a structure including at least one polar element in a cyclic atomic arrangement.

In addition, in this specification, a cyclic group is as mentioned above. Therefore, the cyclic group-type adsorption group only needs to contain a cyclic group containing a polar element, and the adsorption group as a whole may be branched or linear.

On the other hand, a chain-type adsorption group means a structure that has the following structure in the molecule: it does not include a cyclic atomic arrangement containing a polar element, and it contains at least one linear atomic arrangement (branchable). Polar elements.

Furthermore, in this specification, a chain group means an atomic group that does not contain a cyclic arrangement of atoms in the structural formula and forms a linear (branchable) atomic bond, which is called a non-cyclic group. In other words, the chain group means a linear or branched aliphatic group, and may contain either a saturated bond or an unsaturated bond.

Therefore, the chain group includes, for example, an alkyl group, an alkenyl group, an alkoxy group, an ester, an ether or a ketone group. Furthermore, the hydrogen atoms in these groups may be substituted by at least one substituent (reactive functional group (vinyl, acrylyl, methacrylyl, etc.), chain organic group (alkyl, cyano, etc.) )replace. In addition, the chain group may be linear or branched.

As the cyclic base type adsorption group, a heteroaromatic group with 3 to 20 carbon atoms (including a condensed ring) or a heteroalicyclic group with 3 to 20 carbon atoms (including a condensed ring) is preferred, and more preferably Heteroaromatic group having 3 to 12 carbon atoms (including condensed rings) or heteroalicyclic group having 3 to 12 carbon atoms (including condensed rings), more preferably a 5-membered ring heteroaromatic group, 5-membered ring heteroaromatic group A cyclic heteroalicyclic group, a 6-membered cyclic heteroaromatic group, or a 6-membered cyclic heteroalicyclic group. Furthermore, the hydrogen atoms in these ring structures may be substituted by halogen groups, linear or branched alkyl groups or alkoxy groups having 1 to 5 carbon atoms.

As a chain-type adsorption group, a linear or branched alkyl group having 1 to 20 carbon atoms in which a hydrogen atom or -CH ₂ - in the structure is substituted with a polar element is preferred. Furthermore, one or more than two non-adjacent -CH ₂ - in the alkyl group may be substituted by -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO- . In addition, the chain-based adsorption group preferably contains one or two or more polar elements at its end.

The hydrogen atom in the adsorption group may be substituted by a polymerizable group.

Specific examples of polar elements include polar elements containing oxygen atoms (hereinafter referred to as oxygen-containing polar elements), polar elements containing nitrogen atoms (hereinafter referred to as nitrogen-containing polar elements), and polar elements containing phosphorus atoms (hereinafter referred to as nitrogen-containing polar elements). It is a polar element containing phosphorus), a polar element containing boron atoms (hereinafter referred to as boron-containing polar element), a polar element containing silicon atoms (hereinafter referred to as silicon-containing polar element) or a polar element containing sulfur atoms (hereinafter referred to as polar element containing silicon). Sulfur polar element). From the viewpoint of adsorption capacity, the polar element is preferably a nitrogen-containing polar element, a nitrogen-containing polar element or an oxygen-containing polar element, and more preferably an oxygen-containing polar element.

The oxygen-containing polar element is preferably at least one group selected from the group consisting of a hydroxyl group, an alkyl group, an alkoxy group, a carboxyl group, a carboxyl group, an ether group, a carbonyl group, a carbonate group, and an ester group, or the group thereof. A group bonded to a carbon atom.

The nitrogen-containing polar element is preferably at least one group selected from the group consisting of a cyano group, a primary amine group, a secondary amine group, a tertiary amine group, a pyridyl group, an amine carboxyl group, and a urea group, or the group thereof. A group bonded to a carbon atom.

The phosphorus-containing polar element is preferably at least one group selected from the group consisting of a phosphinyl group and a phosphate group or a group in which the group is bonded to a carbon atom.

Therefore, the adsorption group is preferably selected from a cyclic group having an oxygen-containing polar element (hereinafter referred to as an oxygen-containing cyclic group) and a cyclic group having a nitrogen-containing polar element (hereinafter referred to as a nitrogen-containing cyclic group). , a cyclic group having a sulfur-containing polar element (hereinafter referred to as a sulfur-containing cyclic group), a chain group having an oxygen-containing polar element (hereinafter referred to as an oxygen-containing chain group), and a chain group having a nitrogen-containing polar element (hereinafter referred to as a nitrogen-containing chain group), one or more groups in the group may itself or include the group. From the viewpoint of adsorption capacity, it is more preferable to include an oxygen-containing cyclic group, a sulfur-containing cyclic group, or a sulfur-containing chain group. One or more types of groups from the group consisting of a cyclic group, an oxygen-containing chain group, and a nitrogen-containing chain group.

The oxygen-containing cyclic group is preferably any one of the following groups having an oxygen atom in the form of an ether group in the ring structure.

In addition, the oxygen-containing cyclic group is preferably any one of the following groups having an oxygen atom in the ring structure in the form of a carbonyl group, a carbonate group, or an ester group.

As the nitrogen-containing cyclic group, it is preferable to contain any one of the following groups.

As the oxygen-containing chain group, it is preferable to contain any one of the following groups.

*-OH *-OR ^at1 *-COOH

In the formula, R ^at1 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.

Z ^at1 represents a single bond, a linear or branched alkylene group having 1 to 15 carbon atoms, or a linear or branched alkylene group having 2 to 18 carbon atoms. Among them, -CH ₂ - in the alkylene or alkenylene group can be substituted by -O-, -COO-, -C(=O)-, -OCO- in such a way that the oxygen atoms are not directly adjacent.

X ^at1 represents an alkyl group having 1 to 15 carbon atoms. Among them, -CH ₂ - in the alkyl group can be substituted by -O-, -COO-, -C(=O)-, -OCO- in such a way that the oxygen atoms are not directly adjacent.

As a nitrogen-containing chain group, it is preferable to contain any one of the following groups.

*-NH 2

In the formula, R ^at , R ^bt , R ^ct and R ^dt each independently represent a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.

As the adsorption group, a group represented by the following general formula (AT) is preferred.

*-Sp ^AT1 -W ^AT1 -Z ^AT1 (AT)

In the formula, Sp ^AT1 represents a single bond and a linear or branched alkylene group having 1 to 25 carbon atoms. Among them, the hydrogen atom in the alkylene group can be replaced by -OH, -CN, -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -, and the -CH ₂ - in the alkylene group can be not directly bonded with an oxygen atom. Mode is substituted by cyclic group, -O-, -COO-, -C(=O)-, -OCO-, -CH=CH-.

W ^AT1 represents a single bond or the following general formula (WAT1) or (WAT2).

Z ^AT1 represents a 1-valent base containing a polar element. Among them, the hydrogen atoms in Z ^AT1 can be replaced by -OH, -CN, -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -.

(In the formula, Sp ^WAT1 and Sp ^WAT2 independently represent a single bond, a linear or branched alkylene group with 1 to 25 carbon atoms, and the hydrogen atom in the alkylene group can be -OH, -CN, - Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -substituted, -CH ₂ - in the alkylene group can be replaced by cyclic group, -O-, -COO-, - in a way that the oxygen atom is not directly bonded. C(=O)-, -OCO- or -CH=CH-substituted).

Sp ^AT1 , Sp ^WAT1 and Sp ^WAT2 each independently preferably represent a single bond or a straight-chain or branched alkylene group having 1 to 20 carbon atoms, more preferably represent a single bond or a straight-chain carbon atom number. The alkylene group of 1 to 20 is more preferably a single bond or linear alkylene group having 2 to 10 carbon atoms.

In addition, in Sp ^AT1 , Sp ^WAT1 and Sp ^WAT2 , one of the alkylene groups or two or more non-adjacent -CH ₂ - can be independently bonded by -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO- substitution.

In addition, the hydrogen atoms in Sp ^AT1 and Sp ^WAT1 may be independently replaced by -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -.

Z ^AT1 represents a monovalent group containing a polar element, and is preferably a group represented by the following general formula (ZAT1-1) or (ZAT1-2).

*-Sp ^ZAT11 -Z ^ZAT11 -R ^ZAT11 (ZAT1-1)

In the formula, Sp ^ZAT11 and Sp ^ZAT12 each independently represent a linear or branched alkylene group having 1 to 25 carbon atoms. Among them, the hydrogen atom in the alkylene group can be replaced by -OH, -CN, -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -, and the -CH ₂ - in the alkylene group can be replaced directly with an oxygen atom. The adjacent ones are substituted by cyclic groups, -O-, -COO-, -C(=O)-, -OCO- or -CH=CH-.

Z ^ZAT11 represents a basis containing polar elements.

The structure represented by the ring containing Z ^ZAT12 in the general formula (ZAT1-2) represents a 5 to 7-membered ring.

The hydrogen atoms in Z ^ZAT11 and Z ^ZAT12 can be replaced by -OH, -CN, -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -.

R ^ZAT11 and R ^ZAT12 each independently represent a linear or branched alkyl group having 1 to 8 carbon atoms. Among them, the hydrogen atoms in the alkyl group can be replaced by -OH, -CN, -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AT1 -Sp ^AP1 -, and the -CH ₂ - in the alkyl group can not be directly bonded with oxygen atoms. is substituted by a cyclic group, -O-, -COO-, -C(=O)-, -OCO- or -CH=CH-.

As the group represented by the general formula (ZAT1-1), groups represented by the following general formulas (ZAT1-1-1) to (ZAT1-1-30) are preferred.

*-Sp ^ZAT11 -OH (ZAT1-1-21) *-Sp ^ZAT11 -COOH (ZAT1-1-22)

*-Sp ^ZAT11 -CN (ZAT1-1-23) *-Sp ^ZAT11 -NH ₂ (ZAT1-1-24)

In the formula, the hydrogen atom bonded to the carbon atom can be replaced by -OH, -CN, -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -.

Sp ^ZAT11 represents a linear or branched alkylene group having 1 to 25 carbon atoms. Among them, the hydrogen atom in the alkylene group can be replaced by -OH, -CN, -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -, and the -CH ₂ - in the alkylene group can be replaced directly with an oxygen atom. The adjacent ones are substituted by cyclic groups, -O-, -COO-, -C(=O)-, -OCO- or -CH=CH-.

R ^ZAT11 represents a linear or branched alkyl group having 1 to 8 carbon atoms. Among them, the hydrogen atoms in the alkyl group can be replaced by -OH, -CN, -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -, and the -CH ₂ - in the alkyl group can not be directly bonded with oxygen atoms. is substituted by a cyclic group, -O-, -COO-, -C(=O)-, -OCO- or -CH=CH-.

As the group represented by the general formula (ZAT1-2), groups represented by the following general formulas (ZAT1-2-1) to (ZAT1-2-9) are preferred.

In the formula, the hydrogen atom bonded to the carbon atom can be replaced by a halogen atom, -OH, -CN, -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -.

Sp ^ZAT11 represents a linear or branched alkylene group having 1 to 25 carbon atoms. Among them, the hydrogen atom in the alkylene group can be replaced by -OH, -CN, -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -, and the -CH ₂ - in the alkylene group can be replaced directly with an oxygen atom. The adjacent ones are substituted by cyclic groups, -O-, -COO-, -C(=O)-, -OCO- or -CH=CH-.

Examples of the group represented by the general formula (ZAT1-1) include the following groups.

In the formula, R ^tc represents a hydrogen atom, an alkyl group with 1 to 20 carbon atoms, or P ^AP1 -Sp ^AP1 -. Among them, the hydrogen atoms in the alkyl group can be replaced by -OH, -CN, -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -, and the -CH ₂ - in the alkyl group can be replaced by oxygen atoms that are not directly adjacent. Mode is substituted by cyclic group, -O-, -COO-, -C(=O)-, -OCO- or -CH=CH-.

Hydrogen atoms within the molecule may be replaced by P ^AP1 -Sp ^AP1 -.

＊indicates a bonded key.

The alignment aid is preferably one in which the polar element contained in the adsorption group and the polar element contained in the polymerizable group are localized. The adsorption group is an important structure for vertically aligning liquid crystal molecules. By adjoining the adsorption group and the polymerizable group, better alignment can be obtained, and good solubility in the liquid crystal composition can be exhibited.

Specifically, it is preferable that the alignment aid has a polymerizable group and an adsorbent group on the same ring of the mesogen group. This method includes: one or more polymerizable groups and one or more adsorption groups are respectively bonded to the same ring; at least one of the one or more polymerizable groups or at least one of the one or more adsorption groups One is bonded to the other and has a polymerizable group and an adsorbent group on the same ring.

In this case, the hydrogen atom in the spacer group of the polymerizable group may be substituted with the adsorbing group, and the hydrogen atom in the adsorbing group may be substituted with the polymerizable group via the spacer group.

As the alignment aid, a compound represented by the following general formula (SAL) is preferred.

In the formula, the hydrogen atom bonded to the carbon atom can be a linear or branched alkyl group with 1 to 25 carbon atoms, -OH, -CN, -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 - superseded. Among them, the hydrogen atoms in the alkyl group can be replaced by -OH, -CN, -Sp ^AT1 -W ^AT1 -Z ^AT1 or P ^AP1 -Sp ^AP1 -, and the -CH ₂ - in the alkyl group can not be directly bonded with oxygen atoms. is substituted by a cyclic group, -O-, -COO-, -C(=O)-, -OCO- or -CH=CH-.

R ^AK1 has the same meaning as R ^AK1 in the general formula (AK).

A ^AL1 and A ^AL2 each independently represent the same meaning as A ^AL1 and A ^AL2 in the general formula (AL).

Z ^AL1 has the same meaning as Z ^AL1 in the general formula (AL).

m ^AL1 has the same meaning as m ^AL1 in the general formula (AL).

Sp ^AT1 has the same meaning as Sp ^AT1 in the general formula (AT).

W ^AT1 has the same meaning as W ^AT1 in the general formula (AT).

Z ^AT1 has the same meaning as Z ^AT1 in the general formula (AT).

As the compound represented by the general formula (SAL), compounds represented by the following formulas (SAL-1.1) to (SAL-2.9) are preferred.

The amount of alignment aid contained in the liquid crystal composition is preferably about 0.01 to 50% by mass. From the viewpoint of better alignment of liquid crystal molecules, the more preferable lower limits are 0.05 mass% and 0.1 mass%. On the other hand, from the viewpoint of improving response characteristics, more preferable upper limit values are 30 mass%, 10 mass%, 7 mass%, 5 mass%, 4 mass%, and 3 mass%.

Concentration of PSA monomer (P) + PI-free monomer (SAL)

The total content of the compounds represented by the general formula (P) relative to the liquid crystal composition is preferably 0.05 to 10 mass %, more preferably 0.1 to 8 mass %, further preferably 0.1 to 5 mass %, and still more preferably 0.1 ~3% by mass, more preferably 0.2~2% by mass, more preferably 0.2~1.3% by mass, particularly preferably 0.2~1% by mass, and most preferably 0.2~0.56% by mass.

Preferable lower limits of the total content of the compounds represented by the general formula (P) are 0.01 mass %, 0.03 mass %, 0.05 mass %, 0.08 mass %, 0.1 mass %, 0.15 mass %, and 0.2 mass % with respect to the liquid crystal composition. Mass%, 0.25 mass%, 0.3 mass%.

Preferable upper limits for the total content of the compounds represented by the general formula (P) are 10% by mass, 8% by mass, 5% by mass, 3% by mass, 1.5% by mass, 1.2% by mass, and 1% by mass relative to the liquid crystal composition. Mass%, 0.8 mass%, 0.5 mass%.

If the content of the compound represented by the general formula (P) is small, it is difficult to exhibit the effect of adding the compound to the liquid crystal composition. For example, depending on the type of liquid crystal molecules and alignment aids, alignment of the liquid crystal molecules may occur. Issues such as weak binding or weakening over time. On the other hand, if the content of the compound represented by the general formula (P) is too high, for example, depending on the illumination intensity of the active energy ray, problems such as the amount of the compound remaining after curing may increase and the curing may take time. , Reduced reliability of the liquid crystal composition, etc. Therefore, it is preferable to consider the balance of these to set the content.

The total content of the compound represented by the general formula (SAL) (that is, as an alignment aid for the compound containing the adsorption group Z ^AT1 ) and the compound represented by the general formula (P) is preferably 0.05 to 10 mass % with respect to the liquid crystal composition. , preferably 0.1~8 mass%, preferably 0.1~5 mass%, preferably 0.1~3 mass%, preferably 0.2~2 mass%, preferably 0.2~1.3 mass%, preferably 0.2 ~1% by mass, preferably 0.2~0.56% by mass.

Preferable lower limits of the total content of the compound represented by the general formula (SAL) and the compound represented by the general formula (P) are 0.01 mass %, 0.03 mass %, 0.05 mass %, and 0.08 mass % with respect to the liquid crystal composition. , 0.1 mass%, 0.15 mass%, 0.2 mass%, 0.25 mass%, 0.3 mass%.

The preferable upper limits of the total content of the compound represented by the general formula (SAL) and the compound represented by the general formula (P) are 10 mass %, 8 mass %, 5 mass %, and 3 mass % with respect to the liquid crystal composition. , 1.5 mass%, 1.2 mass%, 1 mass%, 0.8 mass%, 0.5 mass%.

If the total content of the compound represented by the general formula (SAL) and the compound represented by the general formula (P) is small, it will be difficult to exhibit the effect of adding these compounds to the liquid crystal composition. Depending on, for example, the type of liquid crystal molecules, etc. Different, sometimes there will be problems such as weak alignment binding force of liquid crystal molecules or weakening over time. On the other hand, if the total content of the compound represented by the general formula (SAL) and the compound represented by the general formula (P) is too large, for example, depending on the difference in the illumination intensity of the active energy ray, the following problems may occur: the compound The remaining amount after curing increases, curing takes time, and the reliability of the liquid crystal composition decreases. Therefore, it is preferable to consider the balance of these to set the content.

In order to improve reliability, the composition in the present invention may further contain one or more compounds (Q) as additives. 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 with 1 to 22 carbon atoms, and one or more CH ₂ groups in the alkyl group can be directly connected to oxygen atoms. The adjacency mode is replaced by -O-, -CH=CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ -, with other structures at * bond).

R ^Q represents a linear or branched chain alkyl group with 1 to 22 carbon atoms. One or more CH ₂ groups in the alkyl group can be replaced by -O-, - in such a way that the oxygen atoms are not directly adjacent. CH=CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ -substituted, preferably linear alkyl group with 1 to 10 carbon atoms, Linear alkoxy, linear alkyl with one CH ₂ group substituted by -OCO- or -COO-, branched alkyl, branched alkoxy, one CH ₂ group substituted with -OCO- or -COO- A branched alkyl group, more preferably a linear alkyl group with 1 to 20 carbon atoms, a linear alkyl group in which one CH ₂ group is substituted by -OCO- or -COO-, a branched alkyl group, or a branched alkoxy group. group, a branched alkyl group in which one CH ₂ 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 formulas (Q-a) to (Q-d).

In the formula, R ^Q1 is preferably a linear or branched alkyl group with 1 to 10 carbon atoms, R ^Q2 is preferably a linear or branched alkyl group with 1 to 20 carbon atoms, and R ^Q3 is preferably Preferably, it is a linear alkyl group, a branched alkyl group, a linear alkoxy group or a branched chain alkoxy group having 1 to 8 carbon atoms. L ^Q is preferably a linear alkyl or branched group having 1 to 8 carbon atoms. Alkylene chain. Among the compounds represented by general formula (Qa) to general formula (Qd), compounds represented by general formula (Qc) and general formula (Qd) are more preferred.

The composition of the present invention preferably contains one or more compounds represented by the general formula (Q), more preferably 1 to 5 compounds, and the content is preferably 0.001 to 1%, and more preferably The preferred range is 0.001 to 0.1%, particularly preferred range is 0.001 to 0.05%.

In addition, as antioxidants or light stabilizers that can be used in the present invention, more specifically, Preferred are compounds represented by the following (Q-1) to (Q-44).

(In the formula, n represents an integer from 0 to 20).

The liquid crystal composition of this embodiment is suitable for use in liquid crystal display elements. Hereinafter, an example of the liquid crystal display element of this embodiment will be described with appropriate reference to FIGS. 1 and 2 .

FIG. 1 is a diagram schematically showing the structure of a liquid crystal display element. In FIG. 1 , for convenience of explanation, each component is shown in an isolated manner. As shown in FIG. 1 , the liquid crystal display element 1 of this embodiment includes a first substrate 2 and a second substrate 3 arranged to face each other, and a liquid crystal layer 4 provided between the first substrate 2 and the second substrate 3 . , the liquid crystal layer 4 is composed of the aforementioned liquid crystal composition of this embodiment.

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

That is, the liquid crystal display element 1 of one embodiment includes 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 The substrate 3 and the second polarizing plate 8 are laminated in sequence.

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 may 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 using a sealing material such as an epoxy thermosetting composition and a sealing material arranged in the peripheral area. In order to maintain the distance between the substrates, for example, glass particles, Granular spacers such as plastic particles and alumina particles, or spacer columns made of resin formed by photolithography.

The first polarizing plate 7 and the second polarizing plate 8 can adjust the polarizing axis of each polarizing plate in such a way that the viewing angle and contrast become good. It is preferable to use the transmission axis through the normally black mode. black mode) operates with mutually orthogonal penetration axes. It is particularly preferable that either one of the first polarizing plate 7 and the second polarizing plate 8 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 into a black matrix, and preferably a black matrix (not shown) is formed at a portion corresponding to the thin film transistor.

The black matrix can be disposed together with the color filter on the substrate on the opposite side of the array substrate, or it can be The color filters may be disposed together on the array substrate side, or the black matrix may be disposed on the array substrate and the color filters may be disposed on the other substrate respectively. In addition, the black matrix can be provided separately from the color filter, or the transmittance can be reduced by overlapping the colors of the color filter.

FIG. 2 is an enlarged plan view of the area surrounded by the I line as part of the pixel electrode layer 5 formed on the first substrate 2 in FIG. 1 . As shown in FIG. 2 , in the pixel electrode layer 5 including a thin film transistor 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 for supplying display signals are provided. The bus lines 12 are arranged in a matrix so as to cross each other. Furthermore, in FIG. 2 , only a pair of gate bus lines 11 and 11 and a pair of data bus lines 12 and 12 are shown.

A unit pixel of the liquid crystal display element is formed using 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 two trunk portions that are orthogonal to each other and form a cross shape, and a plurality of branch portions extending from each trunk portion, that is, it has a so-called fishbone structure. In addition, a Cs electrode 14 is provided between the pair of gate bus lines 11 and 11 substantially parallel to the gate bus line 11 . In addition, a thin film transistor including a source electrode 15 and a bleed electrode 16 is provided near the intersection where the gate bus line 11 and the data bus line 12 intersect with each other. The leakage electrode 16 is provided with a contact hole 17 .

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

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 may 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 firing the amorphous ITO film.

Regarding the liquid crystal display element of this embodiment, for example, the first substrate 2 and the second substrate can be Wiring is formed on the plate 3 by sputtering metal materials such as Al or its alloy, and the pixel electrode layer 5 and the common electrode layer 6 are respectively formed. In addition, the color filter 9 can be made by, for example, a pigment dispersion method, a printing method, an electrodeposition method, a dyeing method, or the like. Taking the method of manufacturing a color filter by a pigment dispersion method as an example, a curable coloring composition for a color filter is coated on the transparent substrate, patterned, and then heated or irradiated with light. It solidifies. This step is performed separately for each of the three colors of red, green, and blue, whereby a pixel portion for a color filter can be produced. In addition, the color filter 9 may be provided on the substrate side with TFT or the like.

The first substrate 2 and the second substrate 3 face each other in such a manner that the pixel electrode layer 5 and the common electrode layer 6 are inside. At this time, the distance between the first substrate 2 and the second substrate 3 can be adjusted through spacers. At this time, the thickness of the liquid crystal layer 4 is preferably adjusted to be, for example, 1 to 100 μm.

When using the polarizing plates 7 and 8 , 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 so that the contrast becomes maximum. In addition, when there are two polarizing plates 7 and 8 , the polarization axis of each polarizing plate can be adjusted so that the viewing angle and contrast become good. Furthermore, a retardation film for widening the viewing angle can also be used. Thereafter, a sealant such as an epoxy thermosetting composition is screen-printed onto the substrate in a manner provided with a liquid crystal injection port, the substrates are bonded to each other, and the sealant is thermally cured by heating.

As for the method of sandwiching the composition between the two substrates 2 and 3, the usual vacuum injection method or the drop filling (ODF: One Drop Fill) method can be used. Although the vacuum injection method does not produce drip marks, there are residual injection traces. problem, but in this embodiment, it can be better used for display elements manufactured by the ODF method. In the liquid crystal display element manufacturing step of the ODF method, the liquid crystal display element can be manufactured by applying an epoxy-based photothermal sealant with a curable sealant to either the front plate or the back plate using a dispenser. It is drawn into a closed-loop embankment shape, and a specific amount of the composition is dropped into it under degassing conditions, and then the front plate and the back plate are joined. In this embodiment, in the ODF method, the occurrence of drip marks when the liquid crystal composition is dropped onto the substrate can be suppressed. In addition, the so-called drip mark is defined as a phenomenon in which the traces of the liquid crystal composition dropped appear to be white when the display is black.

In addition, in the manufacturing process of a liquid crystal display element using the ODF method, it is necessary to drip an optimal injection amount of liquid crystal according to the size of the liquid crystal display element. However, in the case of the liquid crystal composition of this embodiment, for example, due to the time of dripping liquid crystal The impact of sudden pressure changes and impacts in the dropping device is small, and liquid crystal can be stably continued to be dropped for a long time. Therefore, the productivity of liquid crystal display elements can be maintained high. Especially for small liquid crystal display elements commonly used in recently popular smartphones, since the optimal liquid crystal injection amount is small, it is difficult to control the deviation from the optimal value within a certain range. However, by using the present embodiment The liquid crystal composition enables a stable discharge amount of liquid crystal material even in a small liquid crystal display element.

When the liquid crystal composition of the present embodiment contains a polymerizable compound, as a method for polymerizing the polymerizable compound, a moderate polymerization speed is desired in order to obtain good alignment performance of the liquid crystal. Therefore, it is preferable to polymerize the compound alone or in combination or sequentially. A method of polymerizing by irradiating active energy rays such as ultraviolet rays or electron beams. When using ultraviolet light, either a polarized light source or a non-polarized light source can be used. In addition, when polymerizing a composition containing a polymerizable compound sandwiched between two substrates, at least the substrate on the irradiation surface side must be provided with appropriate transparency with respect to active energy rays. In addition, the following method can also be used: using a mask during light irradiation to polymerize only specific parts, changing conditions such as electric field, magnetic field, or temperature to change the alignment state of the unpolymerized parts, and then irradiating active energy rays to make them polymerization. In particular, when performing ultraviolet exposure, it is preferable to apply an AC electric field to the composition containing the polymerizable compound and simultaneously perform ultraviolet exposure. The applied AC electric field is preferably AC with a frequency of 10Hz~10kHz, more preferably a frequency of 60Hz~10kHz, and the voltage is selected according to the desired pretilt angle of the liquid crystal display element. That is, the pretilt angle of the liquid crystal display element can be controlled by the applied voltage. In a transverse electric field MVA mode liquid crystal display element, from the viewpoint of alignment stability and contrast, it is preferable to control the pretilt angle to 80 degrees to 89.9 degrees.

The temperature during irradiation is preferably within a temperature range in which the liquid crystal state of the composition of this embodiment is maintained. It is preferable to polymerize at a temperature close to room temperature, that is, typically at a temperature of 15 to 35°C. As a lamp that generates ultraviolet rays, 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 ultraviolet rays to be irradiated, it is preferable that the ultraviolet rays are irradiated in a wavelength range other than the absorption wavelength range of the composition, and it is preferable that the ultraviolet rays are cut off and used as necessary. The intensity of the ultraviolet irradiation is preferably 0.1mW/cm ² ~100W/cm ² , more preferably 2mW/cm ² ~50W/cm ² . The amount of ultraviolet energy irradiated can be adjusted appropriately, preferably 10mJ/cm ² ~500J/cm ² , more preferably 100mJ/cm ² ~200J/cm ² . The intensity can also be changed when irradiating ultraviolet rays. The time of irradiation with ultraviolet rays is appropriately selected according to the intensity of the ultraviolet rays irradiated, preferably 10 seconds to 3600 seconds, more preferably 10 seconds to 600 seconds.

In the liquid crystal composition of this embodiment, compound (i) does not inhibit the polymerization reaction of the above-mentioned polymerizable compound, so the polymerizable compounds polymerize each other preferably, and unreacted polymerizable compounds can be suppressed from remaining in the liquid crystal composition.

When the above-mentioned compound (ii) is used as the polymerizable compound, the resulting liquid crystal display element 1 includes two substrates 2 and 3 and a liquid crystal composition provided between the two substrates 2 and 3 and the general formula (ii) The liquid crystal layer 4 of the polymer represented by the compound. In this case, it is considered that the polymer of the compound represented by the general formula (ii) is concentrated on the substrates 2 and 3 sides of the liquid crystal layer 4 .

The liquid crystal display element 1 may be an active matrix driving liquid crystal display element. The liquid crystal display element 1 can 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.

Since the liquid crystal display element of this embodiment uses a liquid crystal composition containing compound (i), there is no need to provide a polyimide alignment film on the liquid crystal layer 4 side of the first substrate 2 and the second substrate 3 Alignment film. That is, the liquid crystal display element of this embodiment may be configured such that at least one of the two substrates does not include an alignment film such as a polyimide alignment film.

Example

The following examples are given to further describe the present invention in detail, but the present invention is not limited to these examples. In addition, "%" in the compositions of the following Examples and Comparative Examples means "mass %".

In the Examples, the following abbreviations are used for descriptions of liquid crystal compounds.

(ring structure)

(Side chain structure and bonding structure)

[Table 1]

The characteristics measured in the examples are as follows. In addition, unless otherwise stated, the measurement shall be based on the method specified in JEITA ED-2521B.

Tni: nematic phase-isotropic liquid phase transition temperature (℃)

Tcn: solid phase-liquid crystal phase transition temperature (℃)

△n: Refractive index anisotropy at 25°C

γ1: Rotational viscosity at 25℃ (mPa.s)

△ε: Dielectric constant anisotropy at 25°C

K11: elastic constant K11 (pN) at 25℃

K33: elastic constant K33 (pN) at 25℃

Solubility evaluation test:

The liquid crystal composition was observed at -25°C. By visually observing the presence or absence of precipitation, the judgment is made according to the following two stages. In addition, the observation was performed 10 days after preparation of the liquid crystal composition.

○: Precipitation cannot be confirmed

×: Precipitation is confirmed

Electro-optical characteristic evaluation test (V50):

After irradiation with ultraviolet rays, electro-optical characteristics were evaluated. Measure the penetration rate when a voltage of 0~10V is applied. Let the voltage at which the maximum penetration rate reaches 50% be V50. The electro-optical properties were 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.

(How to make a liquid crystal evaluation unit)

First, a liquid crystal composition containing a polymerizable compound was injected into a liquid crystal cell including an ITO substrate with a cell gap of 3.8 μm by a vacuum injection method. Thereafter, ultraviolet rays were irradiated using a high-pressure mercury lamp through a filter that cut off ultraviolet rays of 325 nm or less while applying a voltage of 10 V at a frequency of 100 Hz to the liquid crystal cell in which the liquid crystal composition containing the polymerizable compound was injected. At this time, it was adjusted so that the illuminance measured under the condition of a central wavelength of 365 nm would be 100 mW/cm ² , and ultraviolet rays with a cumulative light amount of 30 J/cm ² were irradiated. Let the aforementioned ultraviolet irradiation conditions be irradiation condition 1. This irradiation condition 1 provides a pretilt angle to the liquid crystal molecules in the liquid crystal cell.

Next, a fluorescent UV lamp was used to adjust the illuminance measured at a center wavelength of 313 nm so that it became 3 mW/cm ² , and ultraviolet rays with a cumulative light amount of 10 J/cm ² were further irradiated to obtain a liquid crystal display element. Let the aforementioned ultraviolet irradiation conditions be irradiation condition 2. By the irradiation condition 2, the residual amount of the polymerizable compound in the liquid crystal cell that did not react under the irradiation condition 1 is reduced.

Evaluation test for vertical alignment:

Making a first substrate (common electrode substrate) with a transparent electrode layer and a color filter layer composed of a transparent common electrode and without an alignment film, and a pixel electrode layer driven by an active element with a transparent pixel electrode and without The second substrate of the alignment film (pixel electrode substrate). The liquid crystal composition is dropped on the first substrate, and is sandwiched between the second substrate and the sealing material is solidified to obtain a liquid crystal cell. The vertical alignment at this time was observed using a polarizing microscope and evaluated according to the following four stages.

◎: Evenly aligned vertically

○: There are few alignment defects but the level is acceptable

△: There is an alignment defect, which is an unacceptable level.

×: Poor alignment, quite bad

(Preparation of liquid crystal composition)

Liquid crystal compositions of LC-1 to LC-8 and RLC-1 to RLC-4 shown in the table below were prepared and their physical properties were measured. The physical properties are shown in Table 1 and Table 2. In addition, the TNI of the PSA liquid crystal composition used in PID is usually 100°C or higher. Therefore, in this example, the liquid crystal composition having a temperature of 100°C or higher was used as the evaluation object.

[Table 2]

[table 3]

[Table 4]

(Example 1, Comparative Examples 1 to 7)

A polymerizable compound containing 0.2 parts by mass of a compound represented by formula (RM-1) and 0.2 parts by mass of a compound represented by formula (RM-11) added to 100 parts by mass of liquid crystal composition LC-1. The liquid crystal composition is used as Example 1.

The formula of adding 0.2 parts by mass to 100 parts by mass of liquid crystal composition RLC-1 A liquid crystal composition containing a polymerizable compound including a compound represented by (RM-1) and 0.2 parts by mass of a compound represented by formula (RM-11) was used as Comparative Example 1.

A polymerizable compound containing 0.2 parts by mass of a compound represented by formula (RM-1) and 0.2 parts by mass of a compound represented by formula (RM-11) added to 100 parts by mass of liquid crystal composition RLC-2 The liquid crystal composition was used as Comparative Example 2.

A polymerizable compound-containing compound obtained by adding 0.2 parts by mass of the compound represented by the formula (RM-1) and 0.2 parts by mass of the compound represented by the formula (RM-11) to 100 parts by mass of the liquid crystal composition RLC-3. The liquid crystal composition was used as Comparative Example 3.

A polymerizable compound containing 0.2 parts by mass of a compound represented by formula (RM-1) and 0.2 parts by mass of a compound represented by formula (RM-11) added to 100 parts by mass of liquid crystal composition RLC-4. The liquid crystal composition was used as Comparative Example 4.

A polymerizable compound-containing liquid crystal composition in which 1.0 parts by mass of the compound represented by the formula (RRM-1) was added to 100 parts by mass of the liquid crystal composition LC-1 was used as Comparative Example 5.

A polymerizable compound-containing liquid crystal composition in which 1.0 parts by mass of the compound represented by the formula (RRM-2) was added to 100 parts by mass of the liquid crystal composition LC-1 was used as Comparative Example 6.

A polymerizable compound-containing liquid crystal composition in which 1.0 parts by mass of the compound represented by the formula (RRM-3) was added to 100 parts by mass of the liquid crystal composition LC-1 was used as Comparative Example 7.

The solubility, V50, and vertical alignment of Example 1 and Comparative Examples 1 to 6 are shown in Table 3 below.

As a result of the solubility evaluation test of Example 1, no precipitation was confirmed. V50 was evaluated and found to be a sufficiently low value. Tni is 113.1℃ and Tcn is -41℃. The response speed of the liquid crystal display element using this was measured, and a sufficient high-speed response was confirmed. In addition, the measurement conditions of the response speed are: Von is 6V, Voff is 1V, and the measurement temperature is 20°C. The measurement equipment uses OPTIPRO manufactured by Shintec. In addition, it was confirmed that the voltage retention rate (VHR) was high.

From the above, it was confirmed that the liquid crystal display element using the liquid crystal composition of Example 1 exhibits 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. When V50 was evaluated, it was confirmed that it was a higher value than Example 1. Tcn is above 0°C. From this, it was confirmed that Comparative Examples 1 to 4 have poor solubility, a narrow driving temperature range, and low penetration rate. It was confirmed that Comparative Example 5 had poor vertical alignment properties. It was confirmed that Comparative Example 6 had poor solubility. It was confirmed that Comparative Example 7 had poor solubility and insufficient vertical alignment. Furthermore, in Comparative Example 1, the constituent components precipitated immediately after the liquid crystal composition was prepared, so physical property measurement and electro-optical characteristic testing of the liquid crystal composition could not be carried out.

In addition, in this technology, which does not require an alignment film, it is not necessary to control the coating position of the alignment film, which is necessary in the conventional technology. Therefore, the bezel can be narrowed in an actual panel equipped with TFTs. Especially in Gate On Array (gate on array) (TFT substrate with a gate drive circuit integrated into the substrate) panel, the narrow bezel is excellent and can be narrowed to a width of several mm or less.

(Examples 2~24)

A polymerizable compound containing 0.3 parts by mass of the compound represented by the formula (RM-1) and 0.5 parts by mass of the compound represented by the formula (RM-11) added to 100 parts by mass of the liquid crystal composition LC-1. The liquid crystal composition is used as Example 2.

A polymerizable compound-containing compound in which 0.3 parts by mass of the compound represented by the formula (RM-1) and 0.3 parts by mass of the compound represented by the formula (RM-12) are added to 100 parts by mass of the liquid crystal composition LC-1. of The liquid crystal composition was used as Example 3.

A polymerizable compound containing 0.2 parts by mass of a compound represented by formula (RM-1) and 0.2 parts by mass of a compound represented by formula (RM-7) added to 100 parts by mass of liquid crystal composition LC-2. The liquid crystal composition is used as Example 4.

A polymerizable compound containing 0.2 parts by mass of a compound represented by formula (RM-1) and 0.2 parts by mass of a compound represented by formula (RM-3) added to 100 parts by mass of liquid crystal composition LC-2. The liquid crystal composition was used as Example 5.

A polymerizable compound-containing compound in which 0.3 parts by mass of the compound represented by the formula (RM-1) and 0.5 parts by mass of the compound represented by the formula (RM-3) are added to 100 parts by mass of the liquid crystal composition LC-2. The liquid crystal composition was used as Example 6.

A polymerizable compound-containing compound in which 0.6 parts by mass of the compound represented by formula (RM-1) and 1.0 part by mass of the compound represented by formula (RM-3) are added to 100 parts by mass of liquid crystal composition LC-2. The liquid crystal composition was used as Example 7.

A polymerizable compound-containing compound in which 0.3 parts by mass of the compound represented by the formula (RM-1) and 0.5 parts by mass of the compound represented by the formula (RM-4) are added to 100 parts by mass of the liquid crystal composition LC-3. The liquid crystal composition was used as Example 8.

A polymerizable compound-containing compound in which 0.6 parts by mass of the compound represented by formula (RM-1) and 1.0 part by mass of the compound represented by formula (RM-4) are added to 100 parts by mass of liquid crystal composition LC-3. The liquid crystal composition was used as Example 9.

A polymerizable compound-containing compound in which 0.3 parts by mass of the compound represented by formula (RM-1) and 0.25 parts by mass of the compound represented by formula (RM-3) are added to 100 parts by mass of liquid crystal composition LC-3. The liquid crystal composition was used as Example 10.

A polymerizable compound-containing compound obtained by adding 0.15 parts by mass of the compound represented by the formula (RM-1) and 0.5 parts by mass of the compound represented by the formula (RM-3) to 100 parts by mass of the liquid crystal composition LC-3. of The liquid crystal composition was used as Example 11.

To 100 parts by mass of the liquid crystal composition LC-4, 0.3 parts by mass of the compound represented by the formula (RM-1), 0.5 parts by mass of the compound represented by the formula (RM-2), and 0.4 parts by mass of the compound represented by the formula ( A liquid crystal composition containing a polymerizable compound including a compound represented by RM-5) and 0.4 parts by mass of a compound represented by formula (RM-8) was used as Example 12.

To 100 parts by mass of the liquid crystal composition LC-4, 0.3 parts by mass of the compound represented by the formula (RM-1), 0.4 parts by mass of the compound represented by the formula (RM-5), and 0.4 parts by mass of the compound represented by the formula ( A liquid crystal composition containing a polymerizable compound made of a compound represented by RM-10) was used as Example 13.

To 100 parts by mass of the liquid crystal composition LC-4, 0.3 parts by mass of the compound represented by the formula (RM-1), 0.5 parts by mass of the compound represented by the formula (RM-2), and 0.4 parts by mass of the compound represented by the formula ( A polymerizable compound-containing liquid crystal composition containing a compound represented by RM-5) and 0.4 parts by mass of a compound represented by formula (RM-10) was used as Example 14.

To 100 parts by mass of the liquid crystal composition LC-5, 0.3 parts by mass of the compound represented by the formula (RM-1), 0.5 parts by mass of the compound represented by the formula (RM-2), and 0.3 parts by mass of the compound represented by the formula ( A liquid crystal composition containing a polymerizable compound consisting of a compound represented by RM-5), 0.3 parts by mass of a compound represented by formula (RM-10), and 0.2 parts by mass of a compound represented by formula (RM-8) is as Example 15.

To 100 parts by mass of the liquid crystal composition LC-5, 0.3 parts by mass of the compound represented by the formula (RM-1), 0.5 parts by mass of the compound represented by the formula (RM-2), and 0.3 parts by mass of the compound represented by the formula ( A polymerizable compound-containing liquid crystal composition containing a compound represented by RM-5), 0.3 parts by mass of a compound represented by formula (RM-10), and 0.2 parts by mass of a compound represented by formula (RM-9) is used as Example 16.

To 100 parts by mass of the liquid crystal composition LC-5, 0.3 parts by mass of the compound represented by the formula (RM-1), 0.3 parts by mass of the compound represented by the formula (RM-2), and 0.3 parts by mass of the compound represented by the formula ( A polymerizable compound-containing liquid crystal composition containing a compound represented by formula (RM-5) and 0.3 parts by mass of a compound represented by formula (RM-10) was used as Example 17.

To 100 parts by mass of the liquid crystal composition LC-5, 0.3 parts by mass of the compound represented by the formula (RM-1), 0.5 parts by mass of the compound represented by the formula (RM-2), and 0.6 parts by mass of the compound represented by the formula ( A polymerizable compound-containing liquid crystal composition containing a compound represented by formula (RM-5) and 0.5 parts by mass of a compound represented by formula (RM-10) was used as Example 18.

A polymerizable compound-containing compound obtained by adding 0.3 parts by mass of the compound represented by the formula (RM-1) and 0.3 parts by mass of the compound represented by the formula (RM-13) to 100 parts by mass of the liquid crystal composition LC-6. The liquid crystal composition was used as Example 19.

A polymerizable compound containing 0.4 parts by mass of a compound represented by formula (RM-17) and 0.25 parts by mass of a compound represented by formula (RM-14) added to 100 parts by mass of liquid crystal composition LC-7. The liquid crystal composition was used as Example 20.

A polymerizable compound-containing compound in which 0.3 parts by mass of the compound represented by the formula (RM-17) and 0.3 parts by mass of the compound represented by the formula (RM-15) are added to 100 parts by mass of the liquid crystal composition LC-7. The liquid crystal composition was used as Example 21.

A polymerizable compound containing 0.3 parts by mass of a compound represented by formula (RM-17) and 0.7 parts by mass of a compound represented by formula (RM-16) added to 100 parts by mass of liquid crystal composition LC-7. The liquid crystal composition was used as Example 22.

To 100 parts by mass of the liquid crystal composition LC-8, 0.3 parts by mass of the compound represented by the formula (RM-1), 0.3 parts by mass of the compound represented by the formula (RM-2), and 0.2 parts by mass of the compound represented by the formula ( A polymerizable compound-containing liquid crystal composition containing a compound represented by formula (RM-10) and 0.4 parts by mass of a compound represented by formula (RM-18) was used as Example 23.

To 100 parts by mass of the liquid crystal composition LC-8, 0.6 parts by mass of the compound represented by the formula (RM-1), 0.4 parts by mass of the compound represented by the formula (RM-18), and 0.5 parts by mass of the compound represented by the formula ( A liquid crystal composition containing a polymerizable compound made of a compound represented by RM-19) was used as Example 24.

The solubility, V50, and vertical alignment properties of Examples 2 to 24 are shown in Tables 4, 5, and 6 below.

The solubility of Examples 2 to 24 was evaluated, and no precipitation was confirmed. V50 was evaluated and found to be a sufficiently low value. Tni is above 110°C, and Tcn is below -30°C. The response speed of the liquid crystal display element using this was measured, and a sufficient high-speed response was confirmed. In addition, the measurement conditions of the response speed are: Von is 6V, Voff is 1V, and the measurement temperature is 20°C. The measurement equipment uses OPTIPRO manufactured by Shintec. In addition, it was confirmed that the voltage retention rate (VHR) was high.

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

In addition, in this technology, which does not require an alignment film, it is not necessary to control the coating position of the alignment film, which is necessary in the conventional technology. Therefore, the bezel can be narrowed in an actual panel equipped with TFTs. In particular, panels with Gate On Array (a TFT substrate in which a gate drive circuit is built into the substrate) are excellent in narrowing the frame, and can be narrowed to a width of several mm or less.

1: Liquid crystal display element

2: First substrate

3: Second substrate

4: Liquid crystal layer

5: Pixel electrode layer

6: Common electrode layer

7, 8: Polarizing plate

9: Color filter

Claims (7)

A liquid crystal composition having a nematic phase-isotropic liquid phase transition temperature (Tni) of 100°C or above, a negative dielectric anisotropy (Δε), and containing one or more general formulas ( The compound represented by N-1) contains one or more compounds represented by the general formula (L), contains one or more polymerizable compounds, and contains one or more polymerizable compounds with the Alignment aids with different adsorption groups for different compounds,

(In the formula, R ^N11 and R ^N12 each independently represent an alkyl group with 1 to 8 carbon atoms. One or more than two non-adjacent -CH ₂ - in the alkyl group can be independently -CH=CH -, -C≡C-, -O-, -CO-, -COO- or -OCO- substitution, A ^N11 and A ^N12 respectively independently represent selected from the group consisting of the following groups (a) ~ groups (c) The group, (a) 1,4-cyclohexylene group (one -CH ₂ - or two or more non-adjacent -CH ₂ - present in this group can be substituted by -O-), (b) 1, 4-phenylene group (one -CH= or two or more non-adjacent -CH= present in this group may be substituted by -N=), and (c) 1,4-cyclohexenyl group (1 , 4-cyclohexenylene), the above-mentioned group (a), group (b) and group (c) can be independently substituted by a cyano group, a fluorine atom or a chlorine atom, Z ^N11 and Z ^N12 independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -OCF ₂ -, -CF ₂ O-, -CH=NN=CH- , -CH=CH-, -CF=CF- or -C≡C-, but at least one of Z ^N11 is represented by -CH ₂ O-, n ^N11 and n ^N12 each independently represent an integer from 0 to 3, n ^N11 + n ^N12 are independently 1, 2 or 3. When A ^N11 and A ^N12 , Z ^N11 and Z ^N12 exist in plural, they may be the same or different),

(In the formula, R ^L1 and R ^L2 each independently represent an alkyl group with 1 to 8 carbon atoms. One or more than two non-adjacent -CH ₂ - in the alkyl group can be independently -CH=CH -, -C≡C-, -O-, -CO-, -COO- or -OCO- substitution, n ^L1 represents 0, 1, 2 or 3, A ^L1 , A ^L2 and A ^L3 independently represent selected from A group in the group consisting of the following groups (a) to (c), (a) 1,4-cyclohexylene group (one -CH ₂ - present in the group or two or more non-adjacent -CH ₂ - may be substituted by -O-), (b) 1,4-phenylene group (one -CH= present in this group or two or more non-adjacent -CH= may be substituted by -N=), and (c) Naphthalene-2,6-diyl, 1,2,3,4-tetralin-2,6-diyl or decalin-2,6-diyl (present in naphthalene-2,6- One -CH= or two or more non-adjacent -CH= in the diyl or 1,2,3,4-tetralin-2,6-diyl may be substituted by -N=), the above-mentioned group (a ), group (b) and group (c) can be independently substituted by a cyano group, a fluorine atom or a chlorine atom, 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 -, -CF ₂ O-, -CH=NN=CH-, -CH=CH-, -CF= CF- or -C≡C-, when n ^L1 is 2 or 3 and there are plural A ^L2s , these may be the same or different. When n ^L1 is 2 or 3 and there are plural Z ^L2s , these may be the same or different. may be different, except for the compound represented by the general formula (N-1)), as the above-mentioned alignment aid with an adsorption group, it contains one or more types of polymerizable groups, mesogen groups, and adsorption groups. and an alignment-inducing group compound, the above-mentioned polymerizable group is a group represented by P ^AP1 -Sp ^AP1 -, and the above-mentioned P ^AP1 is a group represented by the following general formula (AP-1),

(In the formula, R ^AP1 represents a hydrogen atom or an alkyl group with a carbon number of 1 to 5, * represents a bond with Sp ^AP1 ), and the above Sp ^AP1 represents a single bond or a linear or branched carbon atom number of 1 to 20 alkylene group, the above-mentioned mesogen group is a group represented by the following general formula (AL),

(In the formula, Z ^AL1 represents a single bond or an alkylene group with 2 to 10 carbon atoms. One or more than two non-adjacent -CH ₂ - groups in the alkylene group may be substituted by -O-, A ^AL1 and A ^AL2 independently represents 1,4-phenylene group or 1,4-cyclohexylene group. One or more hydrogen atoms in A ^AL1 and A ^AL2 may be replaced by fluorine atoms or carbon atoms with 1 to 8 carbon atoms. Alkyl substitution, m ^AL1 represents an integer from 1 to 4, when there are multiple Z ^AL1 and A ^AL1 in the molecule, they can be the same or different from each other), the above adsorption group is represented by the following general formula (ZAT1-2-3 ) represents a group or an oxygen-containing chain group,

(In the formula, Sp ^ZAT11 represents a linear or branched alkylene group with 1 to 25 carbon atoms. -CH ₂ - in the alkylene group can be substituted by -O- in such a way that the oxygen atom is not directly adjacent, The hydrogen atom bonded to the carbon atom may be replaced by the above-mentioned P ^AP1 -Sp ^AP1 -), and the above-mentioned oxygen-containing chain group contains any one of the following groups, *-OH

(In the formula, Z ^at1 represents a single bond, a linear or branched alkylene group having 1 to 15 carbon atoms, or a linear or branched alkylene group having 2 to 18 carbon atoms, and the alkylene group -CH ₂ - in the alkenyl group can be substituted by -O-, -COO-, -C(=O)-, -OCO- in such a way that the oxygen atoms are not directly adjacent. X ^at1 represents the number of carbon atoms 1 to 15 an alkyl group, -CH ₂ - in the alkyl group can be substituted by -O-, -COO-, -C(=O)-, -OCO- in such a way that the oxygen atom is not directly adjacent), the above alignment inducer system A group represented by the following general formula (AK), R ^AK1 -* (AK) (wherein R ^AK1 represents a linear or branched alkyl group having 1 to 20 carbon atoms, and 1 in the alkyl group One or more -CH ₂ - can be independently substituted by -O- when the oxygen atom is not directly bonded), as the compound represented by the above general formula (L), the content of the compound in which n ^L1 is 0 It is 35% by mass or less of the total amount of the compound represented by the above general formula (N-1) and the compound represented by the above general formula (L), and the content of the compound where n ^L1 is 1 is the above general formula (N-1 ) and at least 14% by mass of the total amount of the compound represented by the general formula (L) above. For example, in the liquid crystal composition of claim 1, the transition temperature (Tni) of the liquid crystal composition containing the compound represented by the general formula (N-1) contained in the liquid crystal composition is 110°C or higher. For example, the liquid crystal composition of Item 1 or 2 of the patent application contains one or more compounds represented by the general formula (P) as a polymerizable compound,

(In the above general formula (P), R ^p1 represents a hydrogen atom, a fluorine atom, a cyano group, an alkyl group with 1 to 15 carbon atoms or -Sp ^p2 -P ^p2 , and one of the alkyl groups or 2 non-adjacent More than one -CH ₂ - can be independently substituted by -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-, and 1 or 2 of the alkyl groups The above hydrogen atoms may be independently substituted by a cyano group, a fluorine atom or a chlorine atom, and P ^p1 and P ^p2 each independently represent any one of the general formulas (P ^p1 -1) to (P ^p1 -9),

(In the formula, R ^p11 and R ^p12 each independently represent a hydrogen atom, an alkyl group with 1 to 5 carbon atoms or a halogenated alkyl group with 1 to 5 carbon atoms, and W ^p11 represents a single bond, -O-, -COO- or methylene, t ^p11 represents 0, 1 or 2. When there are multiple R ^p11 , R ^p12 , W ^p11 and/or t ^p11 in the molecule, they can be the same or different), Sp ^p1 and Sp ^p2 are independent Z ^p1 and Z ^p2 independently represent single bonds, -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-( In the formula, R ^ZP1 each independently represents a hydrogen atom or an alkyl group with 1 to 4 carbon atoms. When there are multiple R ^ZP1 in the molecule, they may be the same or different), A ^p1 , A ^p2 and A ^p3 are independently means a group selected from the group consisting of the following groups (a ^p ) ~ groups (c ^p ), (a ^p ) 1,4-cyclohexylene (one -CH ₂ - present in the group or not adjacent 2 or more -CH ₂ - may be substituted by -O-), (b ^p ) 1,4-phenylene group (1 -CH= present in this group or 2 or more non-adjacent -CH= may Substituted by -N=), and (c ^p )naphthalene-2,6-diyl, 1,2,3,4-tetralin-2,6-diyl, decalin-2,6-diyl , phenanthrene-2,7-diyl or anthracene-2,6-diyl (one -CH= present in these groups or more than two non-adjacent -CH= can be substituted by -N=), there is One or more hydrogen atoms in the above-mentioned group ( ^ap ), group (b ^p ) and group (c ^p ) may be independently replaced by a halogen atom, a cyano group, or an alkyl group having 1 to 8 carbon atoms. Or -Sp ^p2 -P ^p2 substituted, one or more than two non-adjacent -CH ₂ - in the alkyl group can be independently -CH=CH-, -C≡C-, -O-, -CO -, -COO- or -OCO- substitution, m ^p1 represents 0, 1, 2 or 3. When there are multiple Z ^p1 , A ^p2 , Sp ^p2 and/or P ^p2 in the molecule, they can be the same or different, When m ^p1 is 0 and A ^p1 is phenanthrene-2,7-diyl or anthracene-2,6-diyl, A ^p3 represents a single bond). For example, the liquid crystal composition in items 1 or 2 of the patent scope has a rotational viscosity (γ1) of 167mPa at 25°C. below s. A liquid crystal display element using the liquid crystal composition of any one of items 1 to 4 of the patent application scope. A liquid crystal display element for active matrix driving, the use of which has the patent application scope No. 1 to The liquid crystal composition of any one of the 4 items. A liquid crystal display element, which is VA type, IPS type, FFS type, PSA type or PSVA type, and uses any one of the liquid crystal compositions in items 1 to 4 of the patent application scope.