JPWO2018105378A1 - Liquid crystal composition, liquid crystal display element and liquid crystal display - Google Patents

Abstract

A liquid crystal composition having a large refractive index anisotropy (Δn), an excellent low viscosity, and a negative dielectric anisotropy (Δε) value, a liquid crystal display device using the liquid crystal composition, and the liquid crystal A liquid crystal display provided with a display element is provided.
The value of dielectric anisotropy (Δε) is negative, the compound represented by the general formula (i) is one kind or two kinds or more, and the compound represented by the general formula (ii) is one kind or two Liquid crystal composition containing more than one type. R ⁱ¹ and R ⁱ² each independently represent an alkenyl group having 2 to 8 carbon atoms, and R ⁱⁱ¹ and R ⁱⁱ² each independently represent an alkyl group having 1 to 8 carbon atoms.
[Chemical 1]

Description

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

A liquid crystal display element includes a liquid crystal layer sandwiched between a pair of substrates, and the liquid crystal layer includes a liquid crystal composition. Such liquid crystal display elements are widely used in image display devices such as liquid crystal televisions, computer monitors, mobile phones, information terminals, and game machines.
As a typical display method of the liquid crystal display element, for example, there are a TN (twisted nematic) type, an STN (super twisted nematic) type, an ECB (field effect birefringence) type, and the like. An active matrix liquid crystal display element using TFTs (thin film transistors) includes a VA type that vertically aligns liquid crystal molecules, an IPS (in-plane switching) type that horizontally aligns liquid crystal molecules, and an FFS (fringe) that is a kind thereof. Field switching) type.
Nematic liquid crystals are used for these liquid crystal display elements, and liquid crystal compositions having a positive or negative dielectric anisotropy (Δε) are used depending on the type of the element.

  For example, Patent Document 1 discloses a liquid crystal composition having a negative value of dielectric anisotropy (Δε) useful for providing a matrix liquid crystal display having a large specific resistance that enables various halftone displays. Is disclosed.

JP 2010-254998 A

The liquid crystal composition used in the liquid crystal display element is stable against external factors such as moisture, air, heat, and light, and exhibits a liquid crystal phase in the widest possible temperature range centering on room temperature, and has low viscosity. And a low driving voltage is required. Furthermore, the liquid crystal composition is made from several to several tens of kinds of compounds in order to adjust the dielectric anisotropy (Δε) or the refractive index anisotropy (Δn) to an optimum value for each display element. It is configured. In addition, from the setting of Δn × d, which is the product of Δn and the cell gap (d), it is necessary to adjust Δn of the liquid crystal composition to an appropriate range according to the cell gap. In addition, when applying a liquid crystal display element to a television or the like, since high-speed response is important, a liquid crystal composition having a small rotational viscosity (γ ₁ ) is required.

  However, the liquid crystal composition disclosed in Patent Document 1 has many examples of negative dielectric anisotropy (Δε) and relatively small refractive index anisotropy (Δn), and has low viscosity and response. Inadequate in terms of speed.

  The present invention has been made in view of the above circumstances, has a large refractive index anisotropy (Δn), is excellent in low viscosity, and has a negative dielectric anisotropy (Δε) value. It is an object of the present invention to provide a liquid crystal composition used in a liquid crystal display element having a high response speed, a liquid crystal display element having a high response speed using the liquid crystal composition, and a liquid crystal display including the liquid crystal display element.

The present invention is a liquid crystal composition having a negative dielectric anisotropy (Δε) value,
A liquid crystal composition comprising one or more compounds represented by the following general formula (i) and one or more compounds represented by the following general formula (ii): provide.

（上記式中、Ｒ^ｉ１及びＲ^ｉ２はそれぞれ独立して炭素原子数２〜８のアルケニル基を表し、
Ｒ^ｉｉ１及びＲ^ｉｉ２はそれぞれ独立して炭素原子数１〜８のアルキル基を表し、該アルキル基中の１個又は非隣接の２個以上の−ＣＨ_２−はそれぞれ独立して−ＣＨ＝ＣＨ−、−Ｃ≡Ｃ−、−Ｏ−、−ＣＯ−、−ＣＯＯ−又は−ＯＣＯ−によって置換されていてもよく、
上記一般式（ｉｉ）中のシクロヘキサン環中の１個または２個以上の水素原子は、それぞれ独立してハロゲン原子、炭素原子数１〜８のアルキル基に置換されてよく、また前記アルキル基中の１個又は非隣接の２個以上の−ＣＨ_２−はそれぞれ独立して−ＣＨ＝ＣＨ−、−Ｃ≡Ｃ−、−Ｏ−、−ＣＯ−、−ＣＯＯ−又は−ＯＣＯ−によって置換されていてもよく、
上記一般式（ｉｉ）中のベンゼン環中の１個または２個以上の水素原子は、それぞれ独立して炭素原子数１〜８のアルキル基に置換されてよく、また前記アルキル基中の１個又は非隣接の２個以上の−ＣＨ_２−はそれぞれ独立して−ＣＨ＝ＣＨ−、−Ｃ≡Ｃ−、−Ｏ−、−ＣＯ−、−ＣＯＯ−又は−ＯＣＯ−によって置換されていてもよい。）

(In the above formula, R ⁱ¹ and R ⁱ² each independently represents an alkenyl group having 2 to 8 carbon atoms,
R ⁱⁱ¹ and R ⁱⁱ² each independently represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently —CH═CH Optionally substituted by-, -C≡C-, -O-, -CO-, -COO- or -OCO-,
One or two or more hydrogen atoms in the cyclohexane ring in the general formula (ii) may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms. And two or more non-adjacent —CH ₂ — are each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. You may,
One or two or more hydrogen atoms in the benzene ring in the general formula (ii) may be each independently substituted with an alkyl group having 1 to 8 carbon atoms. Or two or more non-adjacent —CH ₂ — may be independently substituted with —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. Good. )

The present invention also provides a liquid crystal display element using the liquid crystal composition.
The present invention also provides a liquid crystal display including the liquid crystal display element.

  According to the present invention, a liquid crystal composition having a large refractive index anisotropy (Δn), an excellent low viscosity, and a negative dielectric anisotropy (Δε) value, and a response using the liquid crystal composition A high-speed liquid crystal display element and a liquid crystal display including the liquid crystal display element are provided.

It is sectional drawing which shows typically the principal part of one Embodiment of the cell used with the liquid crystal display element of this invention. It is sectional drawing which shows typically the principal part of one Embodiment of the cell used with the liquid crystal display element of this invention. It is sectional drawing which shows typically the principal part of other embodiment of the cell used with the liquid crystal display element of this invention. It is a figure which shows typically one Embodiment of the liquid crystal display element of this invention. It is a top view which expands and shows the liquid crystal display element shown in FIG. It is sectional drawing when the liquid crystal display element shown in FIG. 5 is cut | disconnected.

<< Liquid crystal composition >>
The liquid crystal composition of the present invention is a liquid crystal composition having a negative value of dielectric anisotropy (Δε), and one or more of the compounds represented by the general formula (i), and the general formula It is characterized by containing one or more compounds represented by (ii).

In general formula (i), R ⁱ¹ and R ⁱ² each independently represent an alkenyl group having 2 to 8 carbon atoms. R ⁱ¹ and R ⁱ² may each independently be an alkenyl group having 2 to 6 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyl group having 2 to 4 carbon atoms. It may be an alkenyl group having 2 to 3 carbon atoms, an ethenyl group (that is, a vinyl group), or a 1-propenyl group.
The alkenyl group is preferably selected from groups represented by any of formulas (R1) to (R5). (The black spot in each formula represents a carbon atom in the ring structure.) Therefore, in the preferred alkenyl group of the compound represented by the general formula (i), R ⁱ¹ and R ⁱ² each independently represent the formula (R1) To a group represented by any one of formulas (R5).

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

The lower limit of the preferable content of the compound represented by the general formula (i) with respect to the total amount of the composition of the present invention is 1%, 3%, 5%, 7%, 10%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%.
In the present specification, “%” represents “mass%” unless otherwise specified.

  It is preferable that the compound represented by general formula (i) is a compound represented by general formula (i-1).

（式中、Ｒ^ｉ１１及びＲ^ｉ１２は、それぞれ独立して水素原子又は炭素原子数１〜６のアルキル基を表す。）

(In the formula, R ⁱ¹¹ and R ⁱ¹² each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.)

In general formula (i-1), R ⁱ¹¹ and R ⁱ¹² may each independently be a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, or a hydrogen atom or an alkyl group having 1 to 2 carbon atoms. It may be a hydrogen atom or a methyl group. More preferably from the viewpoint of response speed at least one of R ⁱ¹¹ and ^{R i12} are hydrogen ^atom, it is particularly preferable from the viewpoint of response speed ^{R i11} and ^{R i12} are hydrogen atoms.

  The lower limit of the preferable content of the compound represented by the formula (i-1) with respect to the total amount of the composition of the present invention is 1%, 3%, 5%, 7%. 10%, 12%, 15%, 17%, 19%, 20%, 23%, 25%, 27%, 30% 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 33%, 30%, 28%, 25%, 23%, 22%, 21%, and 20%.

  The compound represented by the general formula (i) is preferably a compound selected from the group of compounds represented by the general formula (i-1-1) to the formula (i-1-8). -1-1) to compounds represented by formula (i-1-6) are preferred, and compounds represented by formulas (i-1-1) to (i-1-3) are preferred. . The general formula (i-1-1) is more preferable.

  It is preferable that the compound represented by general formula (i-1) is a compound chosen from the compound group represented by general formula (L-1-6).

(In the formula, R ^L17 and R ^L18 each independently represent a methyl group or a hydrogen atom.)

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

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

In the general formula (ii), R ⁱⁱ¹ and R ⁱⁱ² each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each Independently, it may be substituted by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-. R ⁱⁱ¹ and R ⁱⁱ² may each independently be an alkyl group having 1 to 6 carbon atoms, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 4 carbon atoms. May be an alkenyl group having 2 to 9 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, or an alkenyl group having 2 to 4 carbon atoms, It may be an alkenyl group having 2 to 3 carbon atoms, an ethenyl group (that is, a vinyl group) or a 1-propenyl group, an alkoxy group having 1 to 7 carbon atoms, and carbon It may be an alkoxy group having 1 to 6 atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 3 carbon atoms.
One or more hydrogen atoms in the cyclohexane ring in the general formula (ii) may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms. One or two or more non-adjacent —CH ₂ — therein are each independently replaced by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. May have been
One or two or more hydrogen atoms in the benzene ring in the general formula (ii) may be each independently substituted with an alkyl group having 1 to 8 carbon atoms. Or two or more non-adjacent —CH ₂ — may be independently substituted with —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. Good.

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

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

  The compound represented by the general formula (ii) may be a compound represented by the following general formula (ii-1).

（式中、Ｒ^ｉｉ１及びＲ^ｉｉ２はそれぞれ独立して炭素原子数１〜８のアルキル基を表し、該アルキル基中の１個又は非隣接の２個以上の−ＣＨ_２−はそれぞれ独立して−ＣＨ＝ＣＨ−、−Ｃ≡Ｃ−、−Ｏ−、−ＣＯ−、−ＣＯＯ−又は−ＯＣＯ−によって置換されていてもよく、Ｘ^ｉｉ１〜Ｘ^ｉｉ１４はそれぞれ独立して水素原子、ハロゲン原子、又は炭素原子数１〜８のアルキル基を表し、該アルキル基中の１個又は非隣接の２個以上の−ＣＨ_２−はそれぞれ独立して−ＣＨ＝ＣＨ−、−Ｃ≡Ｃ−、−Ｏ−、−ＣＯ−、−ＣＯＯ−又は−ＯＣＯ−によって置換されていてもよい。）

( ^Wherein R ⁱⁱ¹ and R ⁱⁱ² each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently -CH = CH -, - C≡C - , - O -, - CO -, - COO- or -OCO- may be substituted ^{by, X ii1 ~X ii14} are each independently a hydrogen atom, a halogen atom Or an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent two or more —CH ₂ — in the alkyl group are each independently —CH═CH—, —C≡C—, (It may be substituted by -O-, -CO-, -COO- or -OCO-).

In general formula (ii-1), R ⁱⁱ¹ and R ⁱⁱ² may each independently be an alkyl group having 1 to 6 carbon atoms, an alkyl group having 1 to 4 carbon atoms, or carbon It may be an alkyl group having 1 to 3 atoms, an alkyl group having 1 to 2 carbon atoms, a methyl group, or an alkoxy group having 1 to 7 carbon atoms. It may be an alkoxy group having 1 to 5 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 3 carbon atoms.

R ⁱⁱ¹ is preferably an alkyl group having 1 to 8 carbon atoms, and R ⁱⁱ² is preferably an alkoxy group having 1 to 7 carbon atoms, R ⁱⁱ¹ is an alkyl group having 1 to 6 carbon atoms, and R ⁱⁱ² is preferably an alkoxy group having 1 to 5 carbon atoms, R ⁱⁱ¹ is an alkyl group having 1 to 4 carbon atoms, and R ⁱⁱ² is an alkoxy group having 1 to 3 carbon atoms. Preferably, R ⁱⁱ¹ is an alkyl group having 1 to 3 carbon atoms, and R ⁱⁱ² is an alkoxy group having 1 to 2 carbon atoms.

In general formula (ii-1), X ^{ii1 to} X ⁱⁱ¹⁴ are each independently preferably a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. More preferably, it is more preferably a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and even more preferably a hydrogen atom or an alkyl group having 1 to 2 carbon atoms. It is still more preferable that it is an atom or a methyl group, and it is especially preferable that it is a hydrogen atom.

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

  The compound represented by the general formula (ii-1) is preferably a compound represented by the following general formula (L-2).

(In the formula, R ^L21 and R ^L22 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently And may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.

R ^L21 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L22 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or a carbon atom. The alkoxy group of number 1-4 is preferable.

R ^L21 is preferably an alkyl group, and R ^L22 is preferably an alkoxy group. R ^L21 is preferably an alkyl group having 1 to 5 carbon atoms, and R ^L22 is preferably an alkoxy group having 1 to 4 carbon atoms.

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

When emphasizing the low-temperature storage stability, the effect is high when the content is set to be large. On the other hand, when the content is important, the effect is high when the content is set low. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.
The lower limit of the preferable content of the compound represented by the formula (L-2) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7%, 10%, 13%, 15%. The upper limit of the preferable content is 30%, 27%, 25%, 23%, 20%, 17%, and 15% with respect to the total amount of the composition of the present invention. %, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

Furthermore, the compound represented by the general formula (L-2) is, for example, the compound represented by the general formula (L-2) represented by the formula (L-2.1) to the formula (L-2.6). The compound chosen from the compound group represented is mentioned. In the compound represented by the general formula (L-2), R ^L21 is preferably an alkyl group, and R ^L22 is preferably an alkoxy group.

  The composition of the present invention preferably contains one or more compounds selected from the group consisting of compounds represented by formulas (N-1), (N-2) and (N-3). . These compounds correspond to dielectrically negative compounds (the sign of Δε is negative and the absolute value is greater than 2).

(In the formula, R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31 and R ^N32 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent 2 in the alkyl group _Two or more —CH ₂ — may be each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31 and A ^N32 are each independently (a) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or adjacent to each other). Two or more —CH ₂ — that are not present may be replaced by —O—.)
(B) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = may be replaced by -N =).
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be replaced by —N═. ) And (d) represents a group selected from the group consisting of 1,4-cyclohexenylene groups, one or two of the above groups (a), (b), (c) and (d) Two or more hydrogen atoms may be independently substituted with a cyano group, a fluorine atom or a chlorine atom,
^{Z N11, Z N12, Z N21} , Z N22, Z N31 and ^{Z N32} are each independently a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -, - OCH 2 -, - CH 2 O- , —COO—, —OCO—, —OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—,
^XN21 represents a hydrogen atom or a fluorine atom,
T ^N31 represents —CH ₂ — or an oxygen atom,
^nN11 , ^nN12 , ^nN21 , ^nN22 , ^nN31 and ^nN32 each independently represent an integer of 0 to 3, but ^nN11 + ^nN12 , ^nN21 + ^nN22 and ^nN31 + ^nN32 are each independently In the case where a plurality of A ^{N11 to} A ^N32 and Z ^{N11 to} Z ^N32 are present, they may be the same or different, but the compound represented by the general formula (ii) except for. )

  The compounds represented by the general formulas (N-1), (N-2) and (N-3) are preferably compounds having a negative Δε and an absolute value larger than 3.

The compounds represented by the general formulas (N-1), (N-2), and (N-3) are straight ring compounds, that is, have a plurality of cyclic groups, and the cyclic groups do not intervene with a linking group. is preferably a compound that is covalently bonded directly ^{to, Z N11, Z N12, Z} N21, Z N22, Z N31 and ^{Z N32} is preferably a single bond. The composition of the present invention preferably comprises a straight ring compound.

In the general formulas (N-1), (N-2), and (N-3), R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31, and R ^N32 each independently represent 1 to 8 carbon atoms. An alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms or an alkenyloxy group having 2 to 8 carbon atoms, preferably an alkyl group having 1 to 5 carbon atoms, and the number of carbon atoms An alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms is preferable, and an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms is preferable. More preferably, an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms is more preferable, and an alkenyl group having 3 carbon atoms (propenyl group) is particularly preferable.

  Further, when the ring structure to which it is bonded is a phenyl group (aromatic), a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and carbon An alkenyl group having 4 to 5 atoms is preferable, and when the ring structure to which the alkenyl group is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a linear alkyl group having 1 to 5 carbon atoms, a straight chain A linear alkoxy group having 1 to 4 carbon atoms and a linear alkenyl group having 2 to 5 carbon atoms are preferable. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

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

A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31, and A ^N32 are preferably aromatic when it is required to increase Δn independently, and in order to improve the response speed, fat A trans-1,4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5 -Difluoro-1,4-phenylene group, 2,3-difluoro-1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1 , 4-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group Preferred, it is more preferable that represents the following structures,

More preferably, it represents a trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group.
^{Z N11, Z N12, Z N21} , Z N22, Z N31 and ^{Z N32} _-CH 2 each _{independently O -, - CF 2 O -} , - CH 2 CH 2 -, - CF 2 CF 2 - or a single bond preferably represents _{an, -CH 2 O -, - CH} 2 CH 2 - or a single bond is more preferable, _-CH 2 O-or a single bond is particularly preferred.

^XN21 is preferably a fluorine atom.
T ^N31 is preferably an oxygen atom.

n ^N11 + n ^N12 , n ^N21 + n ^N22 and n ^N31 + n ^N32 are preferably 1 or 2, a combination in which n ^N11 is 1 and n ^N12 is 0, a combination in which n ^N11 is 2 and n ^N12 is 0, n ^A combination in which ^N11 is 1 and n ^N12 is 1, a combination in which n ^N11 is 2 and n ^N12 is 1, a combination in which n ^N21 is 1 and n ^N22 is 0, n ^N21 is 2 and n ^N22 is n A combination in which n ^N31 is 1 and n ^N32 is 0, and a combination in which n ^N31 is 2 and n ^N32 is 0 are preferable.

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

  The lower limit of the preferable content of the compound represented by the formula (N-2) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, and 30%. , 40%, 50%, 55%, 60%, 65%, 70%, 75%, and 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20% It is.

  The lower limit of the preferable content of the compound represented by the formula (N-3) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, and 30%. , 40%, 50%, 55%, 60%, 65%, 70%, 75%, and 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20% It is.

In the case where a composition having a low response speed and a high response speed is required, the lower limit value is preferably low and the upper limit value is preferably low. Moreover, maintaining high T _NI of the compositions of the present invention, it is preferred if good composition temperature stability is required a low upper limit lower the lower limit of the above. When it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the above lower limit value is increased and the upper limit value is high.
The composition of the present invention has the general formula (N-1) among the three compounds represented by the general formulas (N-1), (N-2) and (N-3) from the viewpoint of reliability and viscosity. It is more preferable that the compound represented by these is further included. That is, the composition of the present invention more preferably contains one or more compounds selected from the group consisting of compounds represented by formula (N-1). As a compound represented by general formula (N-1), the compound group represented by the following general formula (N-1a)-(N-1g) can be mentioned.

(In the formula, R ^N11 and R ^N12 represent the same meaning as R ^N11 and R ^N12 in formula (N-1), n ^Na11 represents 0 or 1, n ^Nb11 represents 1 or 2, and n ^Nc11 represents 0 or 1 is represented, 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 ^{-Represents a} cyclohexylene group or a 1,4-phenylene group, and ^Ng11 represents a trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group, but at least one Represents a 1,4-cyclohexenylene group, and Z ^{Ne 11} represents a single bond or an ethylene group, but at least one represents an ethylene group.)

  The composition of the present invention preferably comprises a straight ring compound having a plurality of cyclic groups and in which the cyclic groups are directly covalently bonded without a linking group. The compound represented by the general formula (N-1) is preferably a compound selected from the group of compounds represented by the general formulas (N-1a) to (N-1c) and (N-1g).

  More specifically, the compounds represented by formula (N-1) are represented by formulas (N-1-1) to (N-1-5) and formulas (N-1-10) to (N- 1-18) and a compound selected from the group of compounds represented by formulas (N-1-20) to (N-1-22), preferably formulas (N-1-1) to (N It is more preferable that it is a compound chosen from the compound group represented by -1-5).

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

（式中、Ｒ^Ｎ１１１及びＲ^Ｎ１１２はそれぞれ独立して、一般式（Ｎ−１）におけるＲ^Ｎ１１及びＲ^Ｎ１２と同じ意味を表す。）

^{(Wherein, R N111} and ^{R N112} each independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N-1).)

^RN111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a propyl group, a pentyl group or a vinyl group. ^RN112 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group or a butoxy group.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. Setting it to a small value is highly effective. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

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

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

In the formula, R ^{N121 to} R ^N122 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently — Optionally substituted by CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
One or two or more hydrogen atoms in the cyclohexane ring may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent 2 in the alkyl group. _Two or more —CH ₂ — may be each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
One hydrogen atom in the benzene ring may be substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent two or more —CH ₂ — in the alkyl group is Each may be independently substituted with —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.

^RN121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group or a pentyl group. ^RN122 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and is a methyl group, an ethyl group, a propyl group, a methoxy group, an ethoxy group, or Propoxy groups are preferred.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

In the formula, R ^{N1211 to} R ^N1212 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently — Optionally substituted by CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
X ^{N1211 to} X ^N1212 each independently represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each Independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—, but at least one of X ^{N1211 to XN1212} Is a hydrogen atom.

^RN1211 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group or a pentyl group. R ^N1212 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 a methyl group, an ethyl group, a propyl group, a methoxy group, an ethoxy group, or Propoxy groups are preferred.

X ^{N1211 to} X ^N1212 are preferably a hydrogen atom, a halogen atom, an alkyl group having 1 to 8 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms, a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, The alkyl group is preferably an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 5 carbon atoms, and particularly preferably a hydrogen atom.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

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

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

In the formula, R ^{N131 to} R ^N132 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently — Optionally substituted by CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
One or two or more hydrogen atoms in the cyclohexane ring may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent 2 in the alkyl group. _Two or more —CH ₂ — may be each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
One hydrogen atom in the benzene ring may be independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent-in the alkyl group. CH ₂ — may be independently substituted with —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.

^RN131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group. ^RN132 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 3 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably a 1-propenyl group, an ethoxy group, a propoxy group, or a butoxy group. .

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

When emphasizing the improvement of Δε, it is preferable to set a large amount of content. When emphasizing low-temperature storage stability, setting a large amount of content is highly effective, and when emphasizing T _NI , the content is set to be high. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

In the formula, R ^{N1311 to} R ^N1312 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently — Optionally substituted by CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
X ^{N1311 to} X ^N1316 each independently represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each Independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—, but at least three of X ^{N1311 to XN1314} Is a hydrogen atom, and at least one of X ^{N1315 to} X ^N1316 is a hydrogen atom.

R ^N1311 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group. R ^N1312 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably a 1-propenyl group, an ethoxy group, a propoxy group, or a butoxy group. .

X ^{N1311 to} X ^N1316 are preferably a hydrogen atom, a halogen atom, an alkyl group having 1 to 8 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms, a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, The alkyl group having 1 to 6 carbon atoms or the alkoxy group having 1 to 5 carbon atoms is more preferable, and a hydrogen atom is particularly preferable.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

  The lower limit of the preferable content of the compound represented by the formula (N-1-3-1) with respect to the total amount of the composition of the present invention is 5%, 7%, and 10%, 13%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, 37%, 40% and 42%. The upper limit of the preferable content is 50%, 48%, 45%, 43%, 40%, 38%, and 35% with respect to the total amount of the composition of the present invention. %, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% %, 8%, 7%, 6%, 5%.

  Furthermore, the compound represented by the general formula (N-1-3) is a compound selected from the group of compounds represented by the formula (N-1-3.1) to the formula (N-1-3.21). It is preferable that it is a compound represented by Formulas (N-1-3.1) to (N-1-3.7) and Formula (N-1-3.21), and Formula (N -1-3.1), Formula (N-1-3.2), Formula (N-1-3.3), Formula (N-1-3.4), and Formula (N-1-3.6) ) Is preferred.

  Compounds represented by formula (N-1-3.1) to formula (N-1-3.4), formula (N-1-3.6) and formula (N-1-3.21) are singly used. Can be used in combination or in combination, but the combination of formula (N-1-3.1) and formula (N-1-3.2), formula (N-1-3.3) ), A formula (N-1-3.4), and a combination of two or three selected from formula (N-1-3.6) are preferred. The lower limit of the preferable content of these compounds alone or with respect to the total amount of the composition of the present invention is 3%, 5%, 10%, 13%, 15%, 17 % And 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

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

^{(Wherein, R N141} and ^{R N142} each independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N-1).)

Independently R ^N141 and ^{R N142} are each an alkyl group having 1 to 5 carbon atoms, preferably an alkenyl group or an alkoxy group having 1 to 4 carbon atoms carbon atoms 4-5, methyl group, propyl group, ethoxy Group or butoxy group is preferred.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. Setting it to the middle is highly effective. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

  Furthermore, the compound represented by the general formula (N-1-4) is a compound selected from the group of compounds represented by the formula (N-1-4.1) to the formula (N-1-4.14). It is preferable that it is a compound represented by Formula (N-1-4.1) to (N-1-4.4), and Formula (N-1-4.1) and Formula (N -1-4.2) and compounds represented by formula (N-1-4.4) are preferred.

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

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

In the formula, R ^{N151 to} R ^N152 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently — Optionally substituted by CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
One hydrogen atom in the benzene ring may be independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent-in the alkyl group. CH ₂ — may be independently substituted with —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.

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

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

In the formula, R ^{N1511 to} R ^N1512 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently — Optionally substituted by CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
X ^{N1511 to XN15110} each independently represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each Independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—, but at least three of X ^{N1511 to XN1514} it is a hydrogen ^atom, at least three of ^{X N1517} ~X ^N15110 is a hydrogen ^atom, at least one of ^{X N1515} ~X ^N1516 is a hydrogen atom.

R ^N1511 and R ^N1512 are each independently preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and an ethyl group, a propyl group, or butyl Groups are preferred.

X ^{N1511 to XN15110} are preferably a hydrogen atom, a halogen atom, an alkyl group having 1 to 8 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms, a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, It is preferably an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 5 carbon atoms, and any one of X ^{N1511 to XN1514} is a hydrogen atom or a fluorine atom, and the remaining three Is preferably a hydrogen atom, and any one of X ^{N1517 to} X ^N15110 is preferably a hydrogen atom or a fluorine atom, and the remaining three are preferably hydrogen atoms, and of X ^{N1515 to} X ^N1516 of is any one hydrogen atom or a fluorine atom, preferably the remaining one is a hydrogen ^atom, the ^{X N1511} ~X ^N1514 It Te is a hydrogen atom is particularly preferred.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

  Furthermore, the compound represented by the general formula (N-1-5) is a compound selected from the compound group represented by the formula (N-1-5.1) to the formula (N-1-5.6). It is preferable that the compound represented by Formula (N-1-5.1), Formula (N-1-5.2), and Formula (N-1-5.4) is preferable.

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

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

(In the formula, R ^N1101 and R ^N1102 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N-1).)

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

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. Setting it to a small value is highly effective. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

  Furthermore, the compound represented by the general formula (N-1-10) is a compound selected from the group of compounds represented by the formula (N-1-10.1) to the formula (N-1-10.14). It is preferable to be represented by formulas (N-1-10.1) to (N-1-10.5), formula (N-1-10.11) and formula (N-1-10.12). The compound is preferably a compound of formula (N-1-10.1), formula (N-1-10.2), formula (N-1-10.11) and formula (N-1-10.12). The compound represented by these is preferable.

  The compounds represented by formula (N-1-10.1), formula (N-1-10.2), formula (N-1-10.11) and formula (N-1-10.12) are single Can be used in combination or in combination, but the lower limit of the preferred content of these compounds alone or with respect to the total amount of the composition of the present invention is 5%, 10% 13%, 15%, 17%, 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

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

（式中、Ｒ^{Ｎ１１１１}及びＲ^{Ｎ１１１２}はそれぞれ独立して、一般式（Ｎ−１）におけるＲ^Ｎ１１及びＲ^Ｎ１２と同じ意味を表す。）

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

^RN1111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group, a vinyl group, or a 1-propenyl group. R ^N1112 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

  The compounds represented by formula (N-1-11.2) and formula (N-1-11.4) can be used alone or in combination, but the composition of the present invention The lower limit of the preferable content of these compounds alone or with respect to the total amount is 5%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

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

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

^RN1121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group. ^RN1122 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

(In the formula, R ^N1131 and R ^N1132 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N-1).)

^RN1131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group. R ^N1132 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

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

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

(In the formula, R ^N1151 and R ^N1152 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N-1).)

^RN1151 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. ^RN1152 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

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

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

(In the formula, R ^N1171 and R ^N1172 each independently represent the same meaning as R ^N11 and R ^N12 in formula (N-1).)

^RN1171 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. ^RN1172 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

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

^RN1181 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN1182 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

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

(In the formula, R ^N1201 and R ^N1202 each independently represent the same meaning as R ^N11 and R ^N12 in formula (N-1).)

R ^N1201 and R ^N1202 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group.
Although the compound represented by general formula (N-1-20) can also be used independently, it can also be used in combination of 2 or more compounds. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required performance such as low-temperature storage stability, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. Setting it to a small value is highly effective. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

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

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

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

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

R ^N1221 and R ^N1222 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

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

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

  The compound represented by General Formula (N-3) is preferably a compound selected from the group of compounds represented by General Formula (N-3-2).

(In the formula, R ^N321 and R ^N322 each independently represent the same meaning as R ^N11 and R ^N12 in formula (N-1).)

R ^N321 and R ^N322 are preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a propyl group or a pentyl group.

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

When emphasizing the improvement of Δε, it is preferable to set a larger content. When emphasizing low-temperature storage stability, it is more effective to set a smaller content. When emphasizing T _NI , the content is preferably increased. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

  The lower limit of the preferable content of the compound represented by the formula (N-3-2) with respect to the total amount of the composition of the present invention is 3%, 5%, 10%, 13% , 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, and 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6% % And 5%.

  Furthermore, the compound represented by the general formula (N-3-2) is a compound selected from the group of compounds represented by the formula (N-3-2.1) to the formula (N-3-2.3). Preferably there is.

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

(Wherein, R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently May be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
n ^L1 represents 0, 1, 2 or 3,
A ^L1 , A ^L2 and A ^L3 each independently represent (a) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or two or more —CH ₂ — not adjacent to each other). May be replaced with -O-.
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be replaced by —N═) and (c) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or 1,2 , 3,4-tetrahydronaphthalene-2,6-diyl group, one —CH═ or two or more non-adjacent —CH═ may be replaced by —N═.
And a hydrogen atom in the group (a), the group (b) and the group (c) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom. ,
Z ^L1 and Z ^L2 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —OCF _2. —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—,
When n ^L1 is 2 or 3, and a plurality of A ^L2 are present, they may be the same or different, and when n ^L1 is 2 or 3, and a plurality of Z ^L2 are present, May be the same or different, but excludes compounds represented by general formulas (i), (ii), (N-1), (N-2) and (N-3). )

  Although the compound represented by general formula (L) may be used independently, it can also be used in combination. Although there is no restriction | limiting in particular in the kind of compound which can be combined, It uses combining suitably according to desired performances, such as low-temperature storage stability, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types, three types, four types, five types, six types, seven types, eight types, nine types, 10 types, More than types.

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

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

When a composition having a low viscosity and a high response speed is required, the lower limit value is high and the upper limit value is preferably high. Moreover, maintaining high T _NI of the compositions of the present invention, it is preferable if the temperature stability with good composition is required upper limit higher the lower limit of the above is high. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the above lower limit value is lowered and the upper limit value is low.

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

The number of halogen atoms present in the molecule is preferably 0, 1, 2 or 3, preferably 0 or 1, and 1 is preferred when importance is attached to compatibility with other liquid crystal molecules.
R ^L1 and R ^L2 are a linear alkyl group having 1 to 5 carbon atoms or a linear alkyl group having 1 to 4 carbon atoms when the ring structure to which R ^L1 is bonded is a phenyl group (aromatic). When the ring structure to which the alkoxy group and the alkenyl group having 4 to 5 carbon atoms are bonded is a saturated ring structure such as cyclohexane, pyran, or dioxane, a straight chain having 1 to 5 carbon atoms is preferable. An alkyl group, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms are preferable. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

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

n ^L1 is preferably 0 when importance is attached to the response speed, 2 or 3 is preferred for improving the upper limit temperature of the nematic phase, and 1 is preferred for balancing these. In order to satisfy the properties required for the composition, it is preferable to combine compounds having different values.

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

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

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

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

  The compound represented by the general formula (L) is preferably a compound selected from the group of compounds represented by the general formulas (L-1) and (L-3) to (L-7).

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

(In the formula, R ^L11 and R ^L12 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L), except for the compound represented by General Formula (i)).

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

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

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

When a composition having a low viscosity and a high response speed is required, the lower limit value is high and the upper limit value is preferably high. Moreover, maintaining high T _NI of the compositions of the present invention, it is preferred if good composition temperature stability is required is the upper limit value in the lower limit of the above is moderate is moderate. When it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the lower limit value is low and the upper limit value is low.

  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).

(In the formula, R ^L12 represents the same meaning as in General Formula (L-1), but excludes the compound represented by General Formula (i).)

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

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

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

(In the formula, R ^L12 represents the same meaning as in General Formula (L-1), but excludes the compound represented by General Formula (i).)

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

Furthermore, the compound represented by the general formula (L-1-2) is a compound selected from the group of compounds represented by the formula (L-1-2.1) to the formula (L-1-2.4). It is preferable that it is a compound represented by Formula (L-1-2.2) to Formula (L-1-2.4). In particular, the compound represented by the formula (L-1-2.2) is preferable because the response speed of the composition of the present invention is particularly improved. Further, when obtaining the high _{T NI} than the response speed, it is preferable to use a compound represented by formula (L-1-2.3) or the formula (L-1-2.4). In order to improve the low-temperature storage stability, the content of the compound represented by the formula (L-1-2.3) and the formula (L-1-2.4) is not preferably 30% or more.

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

  Lower limit of the preferable total content of the compound represented by the formula (L-1-2.3) and the compound represented by the formula (L-1-2.2) with respect to the total amount of the composition of the present invention The values are 10%, 15%, 20%, 25%, 27%, 30%, 35% and 40%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 43%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 32%, 30%, 27%, 25%, and 22%.

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

(In the formula, R ^L13 and R ^L14 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L), except for the compound represented by General Formula (i)).

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

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

Furthermore, the compound represented by the general formula (L-1-3) is a compound selected from the group of compounds represented by the formula (L-1-3.1) to the formula (L-1-3.13). Preferably, it is a compound represented by the formula (L-1-3.1), the formula (L-1-3.3) or the formula (L-1-3.4). In particular, the compound represented by the formula (L-1-3.1) is preferable because the response speed of the composition of the present invention is particularly improved. Further, when obtaining the high _{T NI} than the response speed of the formula (L-1-3.3), the formula (L-1-3.4), the formula (L-1-3.11) and formula (L It is preferable to use a compound represented by (1-3.12). Sum of compounds represented by formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11) and formula (L-1-3.12) The content of is not preferably 20% or more in order to improve the low-temperature storage stability.

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

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

(In the formula, R ^L15 and R ^L16 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L), except for the compound represented by General Formula (i)).

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

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

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

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

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

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

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

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

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

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

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

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

  The compound represented by the general formula (L-3) is preferably a compound selected from the group of compounds represented by formula (L-3.1) to formula (L-3.7). A compound represented by formula (L-3.6) from L-3.1) is preferable.

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

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

R ^L41 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L42 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or a carbon atom. The alkoxy group of number 1-4 is preferable. )

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

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

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

  The compound represented by the general formula (L-4) is preferably, for example, a compound represented by the formula (L-4.1) to the formula (L-4.10).

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

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

  The compound represented by the general formula (L-4) is preferably a compound group represented by, for example, the formula (L-4.4) to the formula (L-4.6). It is preferable that it is a compound represented by a formula (L-4.4).

  Depending on the required performance such as low-temperature storage stability, transition temperature, electrical reliability, birefringence and the like, the compound represented by the formula (L-4.4) Even if it contains the compound represented by 4.5), it contains both the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5). May be.

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

  When both the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5) are contained, both compounds with respect to the total amount of the composition of the present invention The lower limit of the preferable content is 1%, 3%, 5%, 7%, 9%, 11%, 15%, and the preferable upper limit is 45. Yes, 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 in particular, Formula (L-4. The compound represented by 8) is preferred.

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

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

R ^L51 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L52 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or a carbon atom. The alkoxy group of number 1-4 is preferable.

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

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

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

  The compound represented by General Formula (L-5) is preferably, for example, a compound represented by Formula (L-5.1) to Formula (L-5.7).

  The compound represented by General Formula (L-5) is preferably a compound selected from the group of compounds represented by Formula (L-5.1) or Formula (L-5.2), for example. It is preferable that it is a compound represented by a formula (L-5.1).

  The lower limit of the preferable content of the compound group represented by Formula (L-5.1) or Formula (L-5.2) with respect to the total amount of the composition of the present invention is 1%, and 2% 3%, 5% and 7%. The upper limit of the preferable content of these compound groups is 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-5.3) or Formula (L-5.4), for example.
The lower limit of the preferable content of the compound group represented by the formula (L-5.3) or the formula (L-5.4) with respect to the total amount of the composition of the present invention is 1%, and 2% 3%, 5% and 7%. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, and 9%.

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

  The lower limit of the preferable content of the compound group represented by the formula (L-5.5) to the formula (L-5.7) with respect to the total amount of the composition of the present invention is 1%, and 2% 3%, 5% and 7%. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, and 9%.

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

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

R ^L61 and R ^L62 are each independently preferably one of X ^L61 and X ^L62 is a fluorine atom and the other is a hydrogen atom.

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

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

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

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

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

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

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

^{(Wherein, R L71} and ^{R L72} each independently represent the same meaning as ^{R L1} and ^{R L2} in Formula ^{(L), A L71} and ^{A L72} is ^{A L2} and in the general formula (L) independently A ^L3 represents the same meaning, but the hydrogen atoms on A ^L71 and A ^L72 may be each independently substituted with a fluorine atom, Z ^L71 represents the same meaning as Z ^L2 in formula (L), X ^L71 and X ^L72 each independently represent a fluorine atom or a hydrogen atom.)

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

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance required, such as low-temperature storage stability, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, and four kinds.

In the composition of the present invention, the content of the compound represented by the general formula (L-7) is low-temperature storage stability, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, image sticking. Therefore, it is necessary to appropriately adjust according to required performance such as dielectric anisotropy.
The lower limit of the preferable content of the compound represented by the formula (L-7) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7%, 10%, 14%, 16%, 20%. The upper limit of the preferable content of the compound represented by the formula (L-7) with respect to the total amount of the composition of the present invention is 30%, 25%, 23%, and 20%. 18%, 15%, 10%, 5%.

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

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

  Furthermore, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.11) to the formula (L-7.13), and the formula (L-7. It is preferable that it is a compound represented by 11).

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

  Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.31) to the formula (L-7.34), and the formula (L-7. 31) or / and a compound represented by the formula (L-7.32).

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

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

  Preferable total content of the compounds represented by general formula (i), general formula (ii), general formula (L) and (N-1) to (N-3) with respect to the total amount of the composition of the present invention The lower limit of the amount is 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96% 97%, 98%, 99%, 100%. The upper limit of the preferable content is 100%, 99%, 98%, and 95%.

  It is represented by the general formula (i), the general formula (ii), the general formulas (L-1) to (L-7), and (N-1) to (N-3) with respect to the total amount of the composition of the present invention. The lower limit of the preferable total content of the compounds to be obtained is 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95% %, 96%, 97%, 98%, 99%, 100%. The upper limit of the preferable content is 100%, 99%, 98%, and 95%.

  The lower limit of the total preferable content of the compounds represented by the general formula (i), the general formula (ii), and the general formula (N-1-2) with respect to the total amount of the composition of the present invention is 20%. , 23%, 25%, 27%, 30%, 40%, 50%, 55%, 60%, and 65%. The upper limit of the preferable content is 65%, 60%, 50%, 40%, 30%, and 20%.

  The lower limit of the preferable total content of the compounds represented by the general formula (i), the general formula (ii), and the general formula (N-1-3) with respect to the total amount of the composition of the present invention is 17%. , 20%, 22%, 25%, 30%, 35%, 40%, 50%, 60%, 65%. The upper limit of the preferable content is 35%, 30%, 27%, 25%, 20%, and 15%.

  The lower limit of the preferable total content of the compounds represented by general formula (i), general formula (ii), and general formula (N-1-5) with respect to the total amount of the composition of the present invention is 13%. 15%, 20%, 25%, 30%, 35%, 40%, 45%, 47%, 50. The upper limit of the preferable content is 50%, 47%, 45%, 35%, 25%, and 15%.

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

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

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

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

  In order to suppress deterioration due to oxidation of the composition, it is preferable to reduce the content of the compound having a cyclohexenylene group as a ring structure, and the content of the compound having a cyclohexenylene group as the total mass of the composition. On the other hand, it is preferably 10% or less, preferably 8% or less, more preferably 5% or less, preferably 3% or less, and still more preferably not contained.

When emphasizing improvements of improvement and T _NI viscosity, that a hydrogen atom to reduce the content of the compound having the optionally substituted 2-methyl-1,4-diyl group halogen in the molecule The content of the compound having a 2-methylbenzene-1,4-diyl group in the molecule is preferably 10% or less, and preferably 8% or less with respect to the total mass of the composition. It is preferably 5% or less, more preferably 3% or less, and still more preferably substantially not contained.

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

The average elastic constant (K _AVG ) of the liquid crystal composition used in the present invention is preferably 10 to 25, and the lower limit thereof is preferably 10, preferably 10.5, preferably 11 and preferably 11.5. , 12 is preferable, 12.3 is preferable, 12.5 is preferable, 12.8 is preferable, 13 is preferable, 13.3 is preferable, 13.5 is preferable, 13.8 is preferable, 14 is preferable, 14 .3 is preferred, 14.5 is preferred, 14.8 is preferred, 15 is preferred, 15.3 is preferred, 15.5 is preferred, 15.8 is preferred, 16 is preferred, 16.3 is preferred, 16 .5, 16.8 is preferable, 17 is preferable, 17.3 is preferable, 17.5 is preferable, 17.8 is preferable, and 18 is preferable. 25 is preferable, 24.5 is preferable, 24 is preferable, 23.5 is preferable, 23 is preferable, 22.8 is preferable, 22.5 is preferable, 22.3 is preferable, 22 is preferable, and 21.8 is 21.5 is preferred, 21.3 is preferred, 21 is preferred, 20.8 is preferred, 20.5 is preferred, 20.3 is preferred, 20 is preferred, 19.8 is preferred, 19.5 is preferred 19.3 is preferred, 19 is preferred, 18.8 is preferred, 18.5 is preferred, 18.3 is preferred, 18 is preferred, 17.8 is preferred, 17.5 is preferred, 17.3 is preferred 17 is preferable. When importance is placed on reducing power consumption, it is effective to reduce the amount of light from the backlight, and it is preferable to improve the light transmittance of the liquid crystal display element. For this purpose, the value of K _AVG should be set low. preferable. It is preferable to set a higher value of K _AVG in the case of emphasizing improved response speed.

  In the composition of the present invention, in order to produce a liquid crystal display device such as PS mode, PSA mode, PSVA mode, lateral electric field type PSA mode or lateral electric field type PSVA mode, a polymerizable compound (general formula (i), ( ii), (N-1), (N-2) and the compound represented by (N-3) can be contained). Examples of the polymerizable compound that can be used include a photopolymerizable monomer that undergoes polymerization by energy rays such as light. The structure has, for example, a liquid crystal skeleton in which a plurality of six-membered rings such as biphenyl derivatives and terphenyl derivatives are connected. Examples thereof include a polymerizable compound. More specifically, the general formula (XX)

(Wherein, X ²⁰¹ and X ²⁰² each independently represent a hydrogen atom or a methyl group,
Sp ²⁰¹ and Sp ²⁰² are each independently a single bond, an alkylene group having 1 to 8 carbon atoms, or —O— (CH ₂ ) _s — (wherein _s represents an integer of 2 to 7, Preferably bonded to an aromatic ring)
Z ²⁰¹ represents —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —CF ₂ O—, —OCF ₂ —, —CH ₂ CH ₂ —, —CF ₂ CF ₂ —, —CH═. CH—COO—, —CH═CH—OCO—, —COO—CH═CH—, —OCO—CH═CH—, —COO—CH ₂ CH ₂ —, —OCO—CH ₂ CH ₂ —, —CH ₂ CH ₂ —COO—, —CH ₂ CH ₂ —OCO—, —COO—CH ₂ —, —OCO—CH ₂ —, —CH ₂ —COO—, —CH ₂ —OCO—, —CY ¹ ═CY ² — (Wherein Y ¹ and Y ² each independently represents a fluorine atom or a hydrogen atom), —C≡C— or a single bond;
L ²⁰¹ and L ²⁰² are each independently a fluorine atom, an alkyl group having 1 to 8 carbon atoms, or an alkoxy group having 1 to 8 carbon atoms, and M ²⁰¹ is a 1,4-phenylene group, trans-1, Represents a 4-cyclohexylene group or a single bond, and all 1,4-phenylene groups in the formula may have any hydrogen atom substituted by a fluorine atom, and n ²⁰¹ and n ²⁰² are each independently It is an integer of 0-4. ) Is preferred.

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

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

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

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

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

In the general formula (XX), when M ²⁰¹ represents a single bond and the ring structure is formed of two rings, it is preferable to represent the following formulas (XXa-1) to (XXa-5), It is more preferable to represent the formula (XXa-3) from (XXa-1), and it is particularly preferable to represent the formula (XXa-1).

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

  The polymerizable compounds containing these skeletons are optimal for PSA-type liquid crystal display elements because of the alignment regulating power after polymerization, and a good alignment state can be obtained, so that display unevenness is suppressed or does not occur at all.

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

(In the formula, benzene may be substituted with a fluorine atom, and Sp ²⁰ represents an alkylene group having 2 to 5 carbon atoms.)

  In the case of adding a monomer to the composition of the present invention, the polymerization proceeds even when no polymerization initiator is present, but may contain a polymerization initiator in order to accelerate the polymerization. Examples of the polymerization initiator include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides, and the like.

  In the liquid crystal composition according to the present invention, when a polymerizable compound is added, the content of the polymerizable compound is 0.05 to 2% by mass and 0.1 to 1.5% by mass with respect to 100% by mass of the liquid crystal composition. %, 0.2 to 1.0 mass%, and 0.25 to 0.5 mass% are preferably added.

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

(Wherein, R ^Q represents a straight-chain alkyl group or branched alkyl group having from 1 22 carbon atoms, one or two or more CH ₂ groups in the alkyl group, so that the oxygen atoms are not directly adjacent a, -O -, - CH = CH -, - CO -, - OCO -, - COO -, - C≡C -, - CF 2 O -, - OCF 2 - may be replaced by, ^{M Q} is trans -1,4-cyclohexylene group, 1,4-phenylene group or a single bond is represented.)

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

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

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

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

  More specifically, the following compounds (III-1) to (III-40) are preferred as the antioxidant or light stabilizer that can be used in the present invention.

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

  The composition of the present invention preferably contains one or more compounds represented by general formula (Q) or compounds selected from general formulas (III-1) to (III-40). It is more preferable to contain 5 types, and the content is preferably 0.001 to 1%, more preferably 0.001 to 0.1%, and particularly preferably 0.001 to 0.05%.

  In the present invention, the composition containing a polymerizable compound is provided with liquid crystal alignment ability by polymerization of the polymerizable compound contained therein by ultraviolet irradiation, and the amount of transmitted light can be increased by utilizing the birefringence of the composition. Used for controlling liquid crystal display elements.

<< Liquid crystal display element >>
The liquid crystal display element of the present invention is characterized by using the above-described liquid crystal composition of the present invention.
For example, FIG. 1 is a cross-sectional view schematically showing the main part of a cell of an embodiment of the liquid crystal display element of the present invention. Examples of the liquid crystal display element of the present invention include a VA liquid crystal display element having the same cells as those shown in FIG.

The cell 2 </ b> C shown here includes a pair of substrates, a first substrate 23 and a second substrate 24. A first electrode 231 and a first alignment film 232 are stacked in this order on the surface of the first substrate 23 facing (opposite) the second substrate 24 toward the second substrate 24. A second electrode 241 and a second alignment film 242 are stacked in this order on the surface of the second substrate 24 facing (opposite) the first substrate 23 toward the first substrate 23. In the cell 2C, a liquid crystal composition can be sandwiched between the first substrate 23 and the second substrate 24. The first alignment film 232 and the second alignment film 242 control the alignment state of the sandwiched liquid crystal composition.
In FIG. 1, the symbol d ₃ represents a cell gap in the cell 2C.

  Note that the cells shown in FIG. 1 are only some examples of cells that can be used in the present invention, and the cells that can be used in the present invention are not limited to these. For example, those in which various changes are made to these cells can be used in the present invention without departing from the spirit of the present invention.

In addition to the above, the liquid crystal display element of the present invention includes an IPS (in-plane switching) type or FFS (fringe field switching) type liquid crystal display element including the cell shown in FIG. 2 or FIG. .
The liquid crystal display element of this invention can be set as the structure similar to a well-known liquid crystal display element except the point which has the above-mentioned liquid crystal composition of this invention as a liquid crystal composition.
Hereinafter, the cells shown in FIGS. 2 and 3 will be described in detail.

FIG. 2 is a cross-sectional view schematically showing a main part of one embodiment of a cell used in the liquid crystal display element of the present invention.
The cell 2 </ b> A shown here includes a pair of substrates, a first substrate 21 and a second substrate 22. The first electrode 211A and the second electrode 212A are alternately arranged on the surface of the first substrate 21 facing (opposed to) the second substrate 22. Here, a case is shown in which the first electrode 211A corresponds to a positive pole and the second electrode 212A corresponds to a negative pole. In the cell 2A, a liquid crystal composition can be sandwiched between the first substrate 21 and the second substrate 22.

In the cell 2A, the cell gap d ₁ , the electrode width W ₁ of the first electrode 211A and the second electrode 212A, and the inter-electrode distance L ₁ between the first electrode 211A and the second electrode 212A are L ₁ / d ₁ > 1 and L ₁ / W ₁ > 1 is satisfied, the inter-electrode distance L ₁ is larger than the cell gap d ₁ and the electrode width W ₁ , and the first electrode 211A and the second electrode 212A do not have a structure close to each other And it has the electrode structure used with an IPS type | mold liquid crystal display element.

  FIG. 3 is a cross-sectional view schematically showing a main part of another embodiment of a cell used in the liquid crystal display element of the present invention. 3 that are the same as those shown in FIG. 2 are assigned the same reference numerals as in FIG. 2, and detailed descriptions thereof are omitted.

The cell 2 </ b> B shown here includes a pair of substrates, a first substrate 21 and a second substrate 22. On the surface of the first substrate 21 that faces the second substrate 22, the second electrode 212 </ b> B and the insulating layer 213 are stacked in this order toward the second substrate 22, and the insulating layer 213 faces the second substrate 22. A plurality of first electrodes 211B are arranged on the surface to be spaced with a predetermined interval. Here, a case is shown in which the first electrode 211B corresponds to a positive pole and the second electrode 212B corresponds to a negative pole. In the cell 2B, a liquid crystal composition can be sandwiched between the first substrate 21 and the second substrate 22.
In the cell 2B, the cell gap d ₂ and the electrode width W ₂ of the first electrode 211B can be set to be the same as d ₁ and W ₁ in the cell 2A, for example. Cell 2B is a inter-electrode distance _{L 1} to 0 (zero) in it were cells 2A, has a structure formed by laminating a first electrode 211B and the second electrode 212B via the insulating layer 213, FFS type liquid crystal display It has an electrode configuration used in the device.

  In particular, in the cell 2B of the FFS type, in addition to a direction (lateral direction) parallel to the surfaces of the first substrate 21 and the second substrate 22, a direction perpendicular to the surfaces of the first substrate 21 and the second substrate 22 is also provided. An electric field is also generated (in the vertical direction). In particular, a strong electric field is generated in the vertical direction in a region near the side surface of the first electrode 211B. In this case, unlike the cell used in the IPS liquid crystal display element, not only the liquid crystal molecules located between the electrodes (between the first electrode 211B and the second electrode 212B), but also on the electrodes (on the first electrode 211B, the first electrode The liquid crystal molecules located on the two electrodes 212B are also driven more strongly. Therefore, in such a cell 2B, the first electrode 211B and the second electrode 212B are respectively transparent electrodes so that the display function can be exhibited even in these electrode portions, and the liquid crystal display element including such a cell Can increase the aperture ratio.

  The cells shown in FIGS. 1, 2, and 3 are only examples of cells that can be used in the liquid crystal display element of the present invention, and the cells that can be used in the liquid crystal display element are not limited thereto. For example, the cells shown in FIGS. 1, 2 and 3 with various modifications can be used.

  FIG. 4 is a diagram schematically showing an embodiment of the liquid crystal display element of the present invention. In FIG. 4, for convenience of explanation, each component is illustrated separately. The liquid crystal display element 10 shown here includes a first transparent insulating substrate (hereinafter sometimes abbreviated as “first substrate”) 12 having an alignment film 14 formed on the surface thereof, and a distance from the first substrate. A second transparent insulating substrate (hereinafter sometimes abbreviated as “second substrate”) 17 provided on the surface and having an alignment film 14 formed thereon is filled between the first substrate 12 and the second substrate 17. A liquid crystal layer 15 in contact with the pair of alignment films, and an electrode layer 13 including a thin film transistor, a common electrode 122, and a pixel electrode 121 as an active element between the alignment film 14 and the first substrate 12. have.

As shown in FIG. 4, the liquid crystal display element 10 includes a first substrate 12 and a second substrate 17 which are arranged to face each other, and a liquid crystal layer 15 containing the liquid crystal composition is sandwiched between them. This is a liquid crystal display element of an electric field method (here, an FFS type which is a modification example of the IPS type). The first substrate 12 has an electrode layer 13 formed on the surface on the liquid crystal layer 15 side. In addition, a pair that directly contacts the liquid crystal composition constituting the liquid crystal layer 15 between the liquid crystal layer 15 and the first substrate 12 and between the liquid crystal layer 15 and the second substrate 17 to induce homogeneous alignment. These alignment films 14 and 14 are provided, and the alignment directions of these alignment films 14 are substantially parallel to the surface of the first substrate 12 or the second substrate 17. That is, the liquid crystal molecules in the liquid crystal composition are aligned so as to be substantially parallel to the surface of the first substrate 12 or the second substrate 17 when no voltage is applied. As shown in FIGS. 4 and 6, the first substrate 12 and the second substrate 17 may be sandwiched between a pair of polarizing plates 11 and 18. Further, as shown in FIGS. 4 and 6, a color filter 16 is provided between the second substrate 17 and the alignment film 14. The liquid crystal display element of the present invention may be a so-called color filter on array (COA), a color filter may be provided between an electrode layer including a thin film transistor and a liquid crystal layer, or the thin film transistor may be included. A color filter may be provided between the electrode layer and the second substrate.
The liquid crystal display element 10 shown here includes a first polarizing plate 11, a first substrate 12, an electrode layer 13 including a thin film transistor, an alignment film 14, a liquid crystal layer 15 including the liquid crystal composition, and an alignment film 14. The color filter 16, the second substrate 17, and the second polarizing plate 18 are sequentially stacked.

  The first substrate 12 and the second substrate 17 can be made of a transparent insulating material having flexibility such as glass or plastic, and one is made of an opaque insulating material such as silicon. May be. The 1st board | substrate 12 and the 2nd board | substrate 17 are bonded together by sealing materials and sealing materials, such as an epoxy-type thermosetting composition arrange | positioned in the peripheral region, and hold | maintain the distance between board | substrates in the meantime. Therefore, for example, granular spacers such as glass particles, plastic particles, and alumina particles, or spacer columns made of a resin formed by a photolithography method may be arranged.

FIG. 5 is an enlarged plan view showing a region surrounded by the II line of the electrode layer 13 formed on the first substrate 12 in FIG. 6 is a cross-sectional view of the liquid crystal display element shown in FIG. 4 taken along the line III-III in FIG. As shown in FIG. 5, the electrode layer 13 including a thin film transistor formed on the surface of the first substrate 12 includes a plurality of gate lines 126 for supplying scanning signals and a plurality of source lines for supplying display signals. 125 are arranged in a matrix so as to cross each other. Note that FIG. 5 shows only a pair of gate wirings 126 and a pair of source wirings 125.
A unit pixel of the liquid crystal display device is formed by a region surrounded by the plurality of gate lines 126 and the plurality of source lines 125, and a pixel electrode 121 and a common electrode 122 are formed in the unit pixel. A thin film transistor including a source electrode 127, a drain electrode 124, and a gate electrode 128 is provided in the vicinity of the intersection of the gate wiring 126 and the source wiring 125. The thin film transistor is connected to the pixel electrode 121 as a switch element that supplies a display signal to the pixel electrode 121, and drives the pixel electrode 121. A common line 129 is provided in parallel with the gate wiring 126. The common line 129 is connected to the common electrode 122 in order to supply a common signal to the common electrode 122.

  A preferred embodiment of the structure of the thin film transistor is, for example, as shown in FIG. 6, a gate electrode 111 formed on the surface of the first substrate 12, the gate electrode 111 covering the substantially entire surface of the first substrate 12. A gate insulating layer 112 provided so as to cover, a semiconductor layer 113 formed on the surface of the gate insulating layer 112 so as to face the gate electrode 111, and a protection provided so as to cover part of the surface of the semiconductor layer 113 A drain electrode 116 provided to cover the layer 114, one side edge of the protective layer 114 and the semiconductor layer 113, and to be in contact with the gate insulating layer 112 formed on the surface of the first substrate 12; 114 and the other end of the semiconductor layer 113, and a source electrode 117 provided so as to be in contact with the gate insulating layer 112 formed on the surface of the first substrate 12, and a drain It has a down electrode 116 and the insulating protective layer 118 provided so as to cover the source electrode 117, a. In the thin film transistor, an anodized film (not shown) may be formed on the surface of the gate electrode 111 for reasons such as eliminating a step with the gate electrode.

Amorphous silicon, polycrystalline polysilicon, or the like can be used for the semiconductor layer 113; however, when a transparent semiconductor film such as ZnO, IGZO (In—Ga—Zn—O), or ITO is used, light caused by light absorption. This is also preferable from the viewpoint of suppressing the harmful effects of carriers and increasing the aperture ratio of the element.
Further, an ohmic contact layer 115 may be provided between the semiconductor layer 113 and the drain electrode 116 or the source electrode 117 for the purpose of reducing the width and height of the Schottky barrier. For the ohmic contact layer 115, a material in which an impurity such as phosphorus such as n-type amorphous silicon or n-type polycrystalline polysilicon is added at a high concentration can be used.

  The gate wiring 126, the source wiring 125, and the common line 129 are preferably metal, more preferably Al, Cu, Au, Ag, Cr, Ta, Ti, Mo, W, Ni, or an alloy thereof. Or an alloy thereof is particularly preferable. The insulating protective layer 118 is a layer having an insulating function, and is formed of silicon nitride, silicon dioxide, silicon oxynitride film, or the like.

  In the embodiment shown in FIGS. 5 and 6, the common electrode 122 is a flat electrode formed on the substantially entire surface of the gate insulating layer 112 (that is, the first substrate 12), while the pixel electrode 121 is the common electrode. This is a comb-shaped electrode formed on the insulating protective layer 118 covering 122. That is, the common electrode 122 is disposed closer to the first substrate 12 than the pixel electrode 121, and these electrodes are disposed so as to overlap each other via the insulating protective layer 118. The pixel electrode 121 and the common electrode 122 are made of a transparent conductive material such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), or IZTO (Indium Zinc Tin Oxide). Since the pixel electrode 121 and the common electrode 122 are formed of a transparent conductive material, the area opened by the unit pixel area is increased, and the aperture ratio and the transmittance are increased.

  Further, in order to form a fringe electric field between the pixel electrode 121 and the common electrode 122, an inter-electrode distance (minimum separation distance) R between the pixel electrode 121 and the common electrode 122 is set to be equal to that of the first substrate 12 and the second electrode. The distance between the substrates 17 is smaller than the inter-substrate distance G. Here, the interelectrode distance R represents the distance between the electrodes in a direction parallel to the surface of the substrate. FIG. 6 shows an example in which the inter-electrode distance R is 0 because the flat common electrode 122 and the comb-shaped pixel electrode 121 overlap each other, and the inter-electrode distance (minimum separation distance) R is the first substrate. Since the distance between the substrates 12 and the second substrate 17 is smaller than the inter-substrate distance (that is, the cell gap) G, a fringe electric field E is formed. Therefore, in the FFS liquid crystal display element, a horizontal electric field formed in a direction perpendicular to a line forming the comb shape of the pixel electrode 121 and a parabolic electric field can be used. The electrode width l of the comb-shaped portion of the pixel electrode 121 and the gap m of the comb-shaped portion of the pixel electrode 121 are preferably formed to such a width that all the liquid crystal molecules in the liquid crystal layer 15 can be driven by the generated electric field. . The interelectrode distance (minimum separation distance) R between the pixel electrode 121 and the common electrode 122 can be adjusted as the (average) film thickness of the gate insulating layer 112. Further, unlike the liquid crystal display element of the present invention, the inter-electrode distance (minimum separation distance) R between the pixel electrode 121 and the common electrode 122 is different between the first substrate 12 and the second substrate 17, unlike FIG. May be formed to be larger than the inter-substrate distance G (corresponding to the IPS type). Such a liquid crystal display element has, for example, a configuration in which comb-like pixel electrodes and comb-like common electrodes are alternately provided in substantially the same plane.

  The liquid crystal display element of the present invention is preferably an FFS type liquid crystal display element using a fringe electric field, and the shortest separation distance between the adjacent common electrode 122 and the pixel electrode 121 is the alignment films 14 (inter-substrate distance). When the distance is shorter than the shortest separation distance, a fringe electric field is formed between the common electrode and the pixel electrode, and the horizontal and vertical alignments of the liquid crystal molecules can be efficiently used. In the case of the FFS type liquid crystal display element of the present invention, when a voltage is applied to the liquid crystal molecules arranged so that the major axis direction is parallel to the alignment direction of the alignment film, the pixel electrode 121 and the common electrode 122 are interposed. In addition, parabolic electric field lines are formed up to the top of the pixel electrode 121 and the common electrode 122, and are arranged perpendicular to the electric field in which the major axis of the liquid crystal molecules in the liquid crystal layer 15 is formed. Therefore, liquid crystal molecules can be driven even with low dielectric anisotropy.

The color filter 16 preferably forms a black matrix (not shown) in a portion corresponding to the thin film transistor and the storage capacitor 123 from the viewpoint of preventing light leakage. The color filter 16 is usually formed by three filters of R (red), G (green), and B (blue), and constitutes one dot of an image or an image. For example, these three filters are gate wirings. It is lined up in the extending direction. The color filter 16 can be produced by, for example, a pigment dispersion method, a printing method, an electrodeposition method, or a dyeing method. For example, a method for producing a color filter by a pigment dispersion method will be described. A curable coloring composition for a color filter is applied on a transparent substrate, subjected to a patterning treatment, and cured by heating or light irradiation. By performing this process for each of the three colors red, green, and blue, a pixel portion for a color filter can be produced. In addition, a so-called color filter on array in which pixel electrodes provided with active elements such as TFTs and thin film diodes are installed on the substrate may be employed.
On the electrode layer 13 and the color filter 16, a pair of alignment films 14 that are in direct contact with the liquid crystal composition constituting the liquid crystal layer 15 and induce homogeneous alignment are provided.
Further, the polarizing plate 11 and the polarizing plate 18 can be adjusted so that the viewing angle and the contrast are good by adjusting the polarization axis of each polarizing plate, and the transmission axes operate in the normally black mode. It is preferable to have a perpendicular transmission axis. In particular, it is preferable that one of the polarizing plate 11 and the polarizing plate 18 is disposed so as to have a transmission axis parallel to the alignment direction of the liquid crystal molecules. Further, it is preferable to adjust the product of the refractive index anisotropy of the liquid crystal and the cell gap so that the contrast is maximized. Further, a retardation film for widening the viewing angle may be used.

  As another embodiment of the liquid crystal display element of the present invention, in the IPS type, the shortest separation distance between the adjacent common electrode and the pixel electrode is longer than the shortest separation distance between the liquid crystal alignment films, For example, when the common electrode and the pixel electrode are formed on the same substrate and the common electrode and the pixel electrode are alternately arranged, the shortest separation distance between the adjacent common electrode and the pixel electrode is And those having a structure that is longer than the shortest separation distance between the liquid crystal alignment films.

In the liquid crystal display element of the present invention, for example, after a film is formed on a substrate having an electrode layer and / or a surface of the substrate, a pair of substrates are separated and faced so that the film is inside, and then the liquid crystal It is preferable to manufacture by filling the composition between the substrates. In that case, it is preferable to adjust the space | interval of a board | substrate through a spacer.
It is preferable to adjust the distance between the substrates (the average thickness of the liquid crystal layer to be obtained, which is also referred to as the separation distance between the films) to be 1 to 100 μm. And it is preferable that the average separation distance between the said films is 1.5-10 micrometers.
In the present invention, examples of the spacer used for adjusting the distance between the substrates include columnar spacers made of glass particles, plastic particles, alumina particles, a photoresist material, and the like.

  The VA-type, FFS-type, or IPS-type liquid crystal display elements described with reference to FIGS. 1 to 6 are examples of the liquid crystal display elements of the present invention, and these liquid crystal display elements do not depart from the technical idea of the present invention. Various changes can be made within the range.

<< Liquid Crystal Display >>
The liquid crystal display of the present invention is characterized by including the liquid crystal display element of the present invention described above, and can have the same configuration as a known liquid crystal display except that the liquid crystal display element of the present invention is provided.
The liquid crystal display of the present invention can be used as a liquid crystal display in an image display device such as a liquid crystal television, a computer monitor, a mobile phone, an information terminal, or a game machine.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in more detail, this invention is not limited to these Examples. Unless otherwise specified, “%” represents “mass%”.

The following abbreviations are used for the description of compounds in the examples. Note that n represents a natural number.

(Side chain)
-N -C _n H _{2n + 1} linear alkyl group having n carbon atoms n-C _n H _{2n + 1-} linear alkyl group having n carbon atoms -On -OC _n H _{2n + 1} linear chain having n carbon atoms Jo alkoxyl group nO- _C n _{H 2n} + 1 O- carbon atoms n linear alkoxyl group -V -CH = CH ₂
V- CH ₂ = CH-
-V1 -CH = CH-CH ₃
1V- CH ₃ -CH = CH-
_{-2V -CH 2 -CH 2 -CH = CH} 3
_{V2- CH 2 = CH-CH 2} -CH 2 -
_{-2V1 -CH 2 -CH 2 -CH = CH} -CH 3
_{1V2- CH 3 -CH = CH-CH} 2 -CH 2 -

(Linking group)
-N- -C _n H _2n-
-NO- -C _n H _2n -O-
-On- _{-O-C n H 2n} -
-COO- -C (= O) -O-
-OCO- -O-C (= O)-
-CF2O- -CF ₂ -O-
-OCF2- -O-CF ₂ -

(Ring structure)

In the examples, the measured characteristics are as follows.
T _NI : Nematic phase-isotropic liquid phase transition temperature (° C.)
T _CN : Solid phase-nematic phase transition temperature (° C.)
T _NI -T _CN : Nematic phase temperature range Δn: Refractive index anisotropy at 20 ° C. Δε: Dielectric anisotropy at 20 ° C.

γ ₁ : The rotational viscosity (mPa · s) at 20 ° C. was measured using a rotational viscosity measurement system (LCM-2 type) manufactured by Toyo Technica.
τ: The response time (τ) at 20 ° C. of the IPS type liquid crystal display element was measured by an electro-optic measuring device DMS703 manufactured by Autoronic.

(Examples 1, 2, 3, 4 and Comparative Examples 1, 2, and 3)
Liquid crystal compositions having the compositions (mass%) shown in Table 1 and Table 2 were prepared, and their physical properties (T _NI , T _CN , Δn, Δε, γ ₁ ) were measured. The evaluation results are shown in Tables 1 and 2. The response speed was measured using a test cell. Specifically, the liquid crystal composition of the present invention and the liquid crystal composition of the comparative example are each made of a vertical alignment film JALS-2096 (manufactured by JSR Corporation) having a cell thickness (gap / μm = 3.0 to 4.2 μm) ), Filling the ITO solid electrode cell to obtain a liquid crystal display element, and the response speed at 20 ° C. was measured with an electro-optic measuring device DMS703 manufactured by Autoronic.

The liquid crystal composition of Example 1, 2, 3 and 4, the refractive index anisotropy ([Delta] n) is large, the rotational viscosity gamma ₁ is smaller superior low viscosity, the response time (tau) is small, that high-speed response It was confirmed that the value of the dielectric anisotropy (Δε) was negative.

  The liquid crystal composition of the present invention has a negative dielectric anisotropy (Δε) value, a large refractive index anisotropy (Δn), and excellent low viscosity. The present invention can be used for manufacturing display elements and liquid crystal displays.

2, 2A, 2B, 2C ... cells, 21, 23 ... first substrate, 22, 24 ... second substrate, 211A, 211B, 231 ... first electrode, 212A, 212B, 241 ... second electrode, 213 ... insulating layer, 232 ... first alignment layer 242 ... the second alignment _film, d _1, d _{2, d} 3, ... cell _gap, W 1, _{W 2} · .. Electrode width, L ₁ ... Distance between electrodes 10 ... Liquid crystal display element, 12 ... First transparent insulating substrate, 121 ... Pixel electrode, 122 ... Common electrode, 124 ... Drain electrode, 125 ... source wiring, 126 ... gate wiring, 127 ... source electrode, 128 ... gate electrode, 14 ... alignment film, 15 ... liquid crystal layer, 17 ... first 2 transparent insulating substrates, R: distance between electrodes, G: distance between substrates

Claims (10)

A liquid crystal composition having a negative value of dielectric anisotropy (Δε),
A liquid crystal composition comprising one or more compounds represented by the following general formula (i) and one or more compounds represented by the following general formula (ii).

(In the above formula, R ⁱ¹ and R ⁱ² each independently represents an alkenyl group having 2 to 8 carbon atoms,
R ⁱⁱ¹ and R ⁱⁱ² each independently represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently —CH═CH Optionally substituted by-, -C≡C-, -O-, -CO-, -COO- or -OCO-,
One or more hydrogen atoms in the cyclohexane ring in the general formula (ii) may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms. One or two or more non-adjacent —CH ₂ — therein are each independently replaced by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. May have been
One or two or more hydrogen atoms in the benzene ring in the general formula (ii) may be substituted with an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent in the alkyl group. Two or more —CH ₂ — may be each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. ) The liquid crystal composition according to claim 1, comprising one or more compounds selected from the group consisting of compounds represented by the following general formulas (N-1), (N-2) and (N-3). .

(In the formula, R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31 and R ^N32 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent 2 in the alkyl group _Two or more —CH ₂ — may be each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31 and A ^N32 are each independently (a) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or adjacent to each other). Two or more —CH ₂ — that are not present may be replaced by —O—.)
(B) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = may be replaced by -N =).
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be replaced by —N═. ) And (d) represents a group selected from the group consisting of 1,4-cyclohexenylene groups, one or two of the above groups (a), (b), (c) and (d) One or more hydrogen atoms may be independently substituted with a cyano group, a halogen atom or an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent two or more —CH _{2 in the} alkyl group. Each independently represents —CH═CH—, —C≡C—, — Optionally substituted by O-, -CO-, -COO- or -OCO-;
^{Z N11, Z N12, Z N21} , Z N22, Z N31 and ^{Z N32} are each independently a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -, - OCH 2 -, - CH 2 O- , —COO—, —OCO—, —OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—,
^XN21 represents a hydrogen atom or a fluorine atom,
T ^N31 represents —CH ₂ — or an oxygen atom,
^nN11 , ^nN12 , ^nN21 , ^nN22 , ^nN31 and ^nN32 each independently represent an integer of 0 to 3, but ^nN11 + ^nN12 , ^nN21 + ^nN22 and ^nN31 + ^nN32 are each independently In the case where a plurality of A ^{N11 to} A ^N32 and Z ^{N11 to} Z ^N32 are present, they may be the same or different, but the compound represented by the general formula (ii) except for. ) A compound selected from the group consisting of compounds represented by the following general formulas (N-1-2), (N-1-3), and (N-1-5) contains one type or two or more types. Or 2. The liquid crystal composition according to 2.

(In the formula, R ^{N121 to} R ^N122 , R ^{N131 to} R ^N132 , and R ^{N151 to} R ^N152 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent in the alkyl group Two or more —CH ₂ — may be each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
One or two or more hydrogen atoms in the cyclohexane ring in the general formula (N-1-2) may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, In the alkyl group, one or two or more non-adjacent —CH ₂ — are each independently —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO. Optionally substituted by-
One hydrogen atom in the benzene ring in the general formula (N-1-2) may be substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, and one hydrogen atom in the alkyl group or Two or more non-adjacent —CH ₂ — may be each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. ,
One or more hydrogen atoms in the cyclohexane ring in the general formula (N-1-3) may be independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, In the alkyl group, one or two or more non-adjacent —CH ₂ — are each independently —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO. Optionally substituted by-
One hydrogen atom in the benzene ring in the general formula (N-1-3) may be independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms. And two or more non-adjacent —CH ₂ — are each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. You may,
One hydrogen atom in the benzene ring in the general formula (N-1-5) may be independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms. And two or more non-adjacent —CH ₂ — are each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. It may be. ) The liquid crystal composition according to claim 1, which contains one or more compounds represented by the following general formula (L).

(Wherein, R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently May be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
n ^L1 represents 0, 1, 2 or 3,
A ^L1 , A ^L2 and A ^L3 each independently represent (a) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or two or more —CH ₂ — not adjacent to each other). May be replaced with -O-.
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be replaced by —N═) and (c) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or 1,2 , 3,4-tetrahydronaphthalene-2,6-diyl group, one —CH═ or two or more non-adjacent —CH═ may be replaced by —N═.
And a hydrogen atom in the group (a), the group (b) and the group (c) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom. ,
Z ^L1 and Z ^L2 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —OCF _2. —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—,
When n ^L1 is 2 or 3, and a plurality of A ^L2 are present, they may be the same or different, and when n ^L1 is 2 or 3, and a plurality of Z ^L2 are present, May be the same or different, but excludes compounds represented by general formulas (i), (ii), (N-1), (N-2) and (N-3). ) R ⁱⁱ¹ and R ⁱⁱ² are each independently an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 9 carbon atoms, or an alkenyloxy group having 2 to 9 carbon atoms. The liquid crystal composition according to any one of claims 1 to 4, which represents The liquid crystal composition according to claim 5, ^wherein R ⁱⁱ¹ represents an alkyl group having 1 to 8 carbon atoms, and R ⁱⁱ² represents an alkoxy group having 1 to 8 carbon atoms. R ⁱⁱ¹ and R ⁱⁱ² are each independently an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, or an alkenyloxy group having 2 to 6 carbon atoms. The liquid crystal composition according to claim 5, wherein   The liquid crystal according to any one of claims 1 to 7, which does not contain a compound having a negative value of dielectric anisotropy (Δε) having a linking group other than a single bond between the cyclic group and the cyclic group. Composition.   A liquid crystal display element using the liquid crystal composition according to claim 1.   A liquid crystal display comprising the liquid crystal display element according to claim 9.

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