JP2017222749A - Liquid crystal composition and liquid crystal display element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal composition having a large absolute value of dielectric anisotropy (Δε), a low viscosity and negative dielectric anisotropy.SOLUTION: The liquid crystal composition comprises at least one compound represented by formula (N-1) and at least one compound represented by general formula (N-2). In the formulae, Rand Reach independently represent an alkyl group or the like; Aand Aeach independently represent a 1,4-cyclohexylene group or the like; nand neach independently represent an integer of 0 to 3; Rand Reach independently represent an alkyl group or the like; Aand Aeach independently represent a 1,4-cyclohexylene group or the like; Zand Zeach independently represent a single bond or the like; and nand neach independently represent an integer of 0 to 3.SELECTED DRAWING: None

Description

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

  In recent years, liquid crystal televisions are required to have characteristics such as power saving and high resolution. Therefore, the liquid crystal composition is required to have low voltage driving and high-speed response, that is, a large absolute value of dielectric anisotropy (Δε) and a low viscosity.

  On the other hand, it is known to use a compound having a pyridazine ring as a component of a liquid crystal composition. However, its use is a matrix liquid crystal composition of a ferroelectric liquid crystal (for example, Patent Document 1), a special liquid crystal composition for ECB (Electrically Controlled Birefringence) (for example, Patent Document 2), and has a pyridazine ring. Until now, the compound has not been sufficiently studied.

JP-A-5-230031 Japanese Patent Laid-Open No. 5-271657

  The base liquid crystal composition disclosed in Patent Document 1 expresses a smectic phase and does not express a nematic phase. In addition, the liquid crystal composition disclosed in Patent Document 2 has a higher viscosity than the absolute value of Δε, and does not satisfy the high-speed response required for liquid crystal compositions in recent years.

  The problem to be solved by the present invention is to provide a liquid crystal composition having a large absolute value of Δε, a low viscosity, and having a negative Δε that can withstand practical use.

（式中、Ｒ^Ｎ１１及びＲ^Ｎ１２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個又は隣接していない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、
Ａ^Ｎ１１及びＡ^Ｎ１２は、それぞれ独立して
（ａ） １，４−シクロヘキシレン基（この基中に存在する１個の−ＣＨ_２−又は隣接していない２個以上の−ＣＨ_２−は−Ｏ−に置換されてもよい。）、
（ｂ） １，４−フェニレン基（この基中に存在する１個の−ＣＨ＝又は隣接していない２個以上の−ＣＨ＝は−Ｎ＝に置換されてもよい。）、
（ｃ） ナフタレン−２，６−ジイル基、１，２，３，４−テトラヒドロナフタレン−２，６−ジイル基又はデカヒドロナフタレン−２，６−ジイル基（ナフタレン−２，６−ジイル基又は１，２，３，４−テトラヒドロナフタレン−２，６−ジイル基中に存在する１個の−ＣＨ＝又は隣接していない２個以上の−ＣＨ＝は−Ｎ＝に置換されてもよい。）、及び
（ｄ） １，４−シクロヘキセニレン基
からなる群より選ばれる基を表し、上記の基（ａ）、基（ｂ）、基（ｃ）及び基（ｄ）はそれぞれ独立してシアノ基、フッ素原子又は塩素原子で置換されていてもよく、
Ｚ^Ｎ１１及びＺ^Ｎ１２は、それぞれ独立して、単結合、−ＣＨ_２ＣＨ_２−、−（ＣＨ_２）_４−、−ＯＣＨ_２−、−ＣＨ_２Ｏ−、−ＣＯＯ−、−ＯＣＯ−、−ＯＣＦ_２−、−ＣＦ_２Ｏ−、−ＣＨ＝Ｎ−Ｎ＝ＣＨ−、−ＣＨ＝ＣＨ−、−ＣＦ＝ＣＦ−又は−Ｃ≡Ｃ−を表し、
ｎ^Ｎ１１及びｎ^Ｎ１２は、それぞれ独立して０〜３の整数を表し、ｎ^Ｎ１１＋ｎ^Ｎ１２は１、２又は３であり、
Ａ^Ｎ１１及びＡ^Ｎ１２、Ｚ^Ｎ１１及びＺ^Ｎ１２が複数存在する場合は、それぞれは互いに同一であっても異なっていてもよい。）で表される少なくとも一種類の化合物と、一般式（Ｎ−２）：

（式中、Ｒ^Ｎ２１及びＲ^Ｎ２２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個又は隣接していない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、
Ａ^Ｎ２１及びＡ^Ｎ２２は、それぞれ独立して、
（ａ） １，４−シクロヘキシレン基（この基中に存在する１個の−ＣＨ_２−又は隣接していない２個以上の−ＣＨ_２−は−Ｏ−に置換されてもよい。）、
（ｂ） １，４−フェニレン基（この基中に存在する１個の−ＣＨ＝又は隣接していない２個以上の−ＣＨ＝は−Ｎ＝に置換されてもよい。）、
（ｃ） ナフタレン−２，６−ジイル基、１，２，３，４−テトラヒドロナフタレン−２，６−ジイル基又はデカヒドロナフタレン−２，６−ジイル基（ナフタレン−２，６−ジイル基又は１，２，３，４−テトラヒドロナフタレン−２，６−ジイル基中に存在する１個の−ＣＨ＝又は隣接していない２個以上の−ＣＨ＝は−Ｎ＝に置換されてもよい。）、及び
（ｄ） １，４−シクロヘキセニレン基
からなる群より選ばれる基を表し、上記の基（ａ）、基（ｂ）、基（ｃ）及び基（ｄ）はそれぞれ独立してシアノ基、フッ素原子又は塩素原子で置換されていてもよく、
Ｚ^Ｎ２１及びＺ^Ｎ２２は、それぞれ独立して、単結合、−ＣＨ_２ＣＨ_２−、−（ＣＨ_２）_４−、−ＯＣＨ_２−、−ＣＨ_２Ｏ−、−ＣＯＯ−、−ＯＣＯ−、−ＯＣＦ_２−、−ＣＦ_２Ｏ−、−ＣＨ＝Ｎ−Ｎ＝ＣＨ−、−ＣＨ＝ＣＨ−、−ＣＦ＝ＣＦ−又は−Ｃ≡Ｃ−を表し、
ｎ^Ｎ２１及びｎ^Ｎ２２は、それぞれ独立して０〜３の整数を表し、ｎ^Ｎ２１＋ｎ^Ｎ２２は１、２又は３であり、
Ａ^Ｎ２１及びＡ^Ｎ２２、Ｚ^Ｎ２１及びＺ^Ｎ２２が複数存在する場合は、それぞれは互いに同一であっても異なっていてもよい。）で表される少なくとも一種類の化合物とを含有する、液晶組成物を提供する。 One aspect of the present invention is the general formula (N-1):

(In the formula, R ^N11 and R ^N12 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each represented by Independently may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
A ^N11 and A ^N12 each independently represent (a) a 1,4-cyclohexylene group (one —CH ₂ — present in the group or two or more —CH ₂ — not adjacent to each other is — O-) may be substituted.
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be substituted with —N═),
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be substituted with —N═. ), And (d) represents a group selected from the group consisting of 1,4-cyclohexenylene groups, and the above groups (a), (b), (c) and (d) are each independently May be substituted with a cyano group, a fluorine atom or a chlorine atom,
Z ^N11 and Z ^N12 each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, — OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—
n ^N11 and n ^N12 each independently represent an integer of 0 to 3, and n ^N11 + n ^N12 is 1, 2 or 3,
When there are a plurality of A ^N11 and A ^N12 , Z ^N11 and Z ^N12 , each may be the same as or different from each other. And at least one compound represented by formula (N-2):

(In the formula, R ^N21 and R ^N22 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 independent. And may be substituted by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-,
A ^N21 and A ^N22 are each independently
(A) 1,4-cyclohexylene group, (this is present in the group one -CH ₂ - - or nonadjacent two or more -CH ₂ may be replaced by -O-.)
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be substituted with —N═),
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be substituted with —N═. ), And (d) represents a group selected from the group consisting of 1,4-cyclohexenylene groups, and the above groups (a), (b), (c) and (d) are each independently May be substituted with a cyano group, a fluorine atom or a chlorine atom,
Z ^N21 and Z ^N22 each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, — OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—
n ^N21 and n ^N22 each independently represent an integer of 0 to 3, n ^N21 + n ^N22 is 1, 2 or 3,
When there are a plurality of A ^N21 and A ^N22 , Z ^N21 and Z ^N22 , each may be the same as or different from each other. And a liquid crystal composition containing at least one compound represented by the formula:

  Another aspect of the present invention provides a liquid crystal display device comprising two substrates and a liquid crystal layer including the liquid crystal composition provided between the two substrates.

  Since the liquid crystal composition of the present invention has a negative Δε, a large absolute value, and low viscosity, a liquid crystal display device using the liquid crystal composition can be driven at a low voltage and is excellent. High speed response.

  Hereinafter, preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the following embodiments.

  In the present specification, unless otherwise specified, “%” means “mass%”.

で表される少なくとも一種類の化合物と、一般式（Ｎ−２）：

で表される少なくとも一種類の化合物とを含有する。 The liquid crystal composition according to this embodiment has a general formula (N-1):

At least one compound represented by formula (N-2):

And at least one compound represented by the formula:

In General Formula (N-1), R ^N11 and R ^N12 each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent —CH ₂ — may each independently be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. R ^N11 and R ^N12 are each independently an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkenyl having 2 to 8 carbon atoms. An oxy group is preferable, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms is more preferable. An alkyl group having 1 to 5 atoms, an alkoxy group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms is more preferable, an alkyl group having 2 to 5 carbon atoms, and an alkoxy having 2 to 4 carbon atoms. A group or an alkenyl group having 2 to 3 carbon atoms is still more preferable, and an alkyl group having 2 to 5 carbon atoms or an alkoxy group having 2 to 4 carbon atoms is particularly preferable. The alkyl group, alkoxy group, alkenyl group and alkenyloxy group are preferably linear.

In addition, when the ring structure to which R ^N11 and / or R ^N12 are bonded is an aromatic ring such as a benzene ring, a linear alkyl group having 1 to 5 carbon atoms, a linear carbon atom having 1 to 5 carbon atoms. 4 alkoxy groups and alkenyl groups having 4 to 5 carbon atoms are preferred, and when the ring structure to which they are bonded is a saturated ring structure such as cyclohexane, pyran, dioxane, etc., linear 1 to 5 carbon atoms 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.)

In particular, when the ring structure to which R ^N11 and / or R ^N12 is bonded is a saturated ring structure, formulas (R1) to (R3) are preferable, and the ring structure to which R ^N11 and / or R ^N12 is bonded is an aromatic ring. In this case, the formula (R4) or (R5) is preferable.

In general formula (N-1), A ^N11 and A ^N12 each independently represent (a) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or not adjacent 2 more than five -CH ₂ - may be substituted with -O-),.
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be substituted with —N═),
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be substituted with —N═. ), And (d) represents a group selected from the group consisting of 1,4-cyclohexenylene groups, and the above groups (a), (b), (c) and (d) are each independently It may be substituted with a cyano group, a fluorine atom or a chlorine atom. A ^N11 and A ^N12 are preferably aromatic when it is required to independently increase Δn, and are preferably aliphatic for improving the response speed. 4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group, 2 , 3-difluoro-1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1,4-diyl group, naphthalene-2,6 -It preferably represents a diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, and more preferably represents the following structure: ,

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

In General Formula (N-1), Z ^N21 and Z ^N22 each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C— are represented. Z ^N11 and ^{Z N12} are each _{independently -CH} 2 and _{O -, - CF 2 O -} , - CH 2 CH 2 -, - CF 2 CF 2 - or preferably a single bond, _-CH 2 O- , —CH ₂ CH ₂ — or a single bond is more preferable, and —CH ₂ O— or a single bond is particularly preferable.

In General Formula (N-1), n ^N21 and n ^N22 each independently represent an integer of 0 to 3, and n ^N21 + n ^N22 is 1, 2 or 3. n ^N11 + n ^N12 is preferably 1 or 2, a combination in which n ^N11 is 1 and n ^N12 is 0, a combination in which n ^N11 is 2 and n ^N12 is 0, n ^N11 is 1 and n ^N12 is 1 A combination is preferred.

  The lower limit of the preferable content of the compound represented by the formula (N-1) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 10%, 20%, 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.

When the liquid crystal composition according to the present embodiment requires a liquid crystal composition having a low viscosity and a high response speed, the lower limit value is preferably low and the upper limit value is preferably low. Furthermore, when the liquid crystal composition according to the present embodiment maintains a high T _ni and a liquid crystal composition having good temperature stability, the lower limit value is preferably low and the upper limit value is preferably low. Further, 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 high and the upper limit value is high.

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

^{Wherein, R N11} and ^{R N12} are the same meaning as ^{R N11} and ^{R N12} in the general formula ^{(N-1), n Na12} represents 0 or ^{1, n NB11} represents 0 or ^{1, n NC11 Represents} 0 or 1, n ^Nd11 represents 0 or 1, n ^Ne11 represents 1 or 2, n ^Nf12 represents 1 or 2, n ^Ng11 represents 1 or 2, and A ^Ne11 represents ^Represents a trans-1,4-cyclohexylene group or a 1,4-phenylene group, and A ^Ng11 represents a trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group, or a 1,4-phenylene group. In which at least one represents a 1,4-cyclohexenylene group, Z ^Ne11 represents a single bond or ethylene, but at least one represents ethylene.

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

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

In the formula, R ^N111 and R ^N112 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N-1).

R ^N111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a propyl group, a pentyl group, or a vinyl group. ^RN112 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group or a butoxy group.

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

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

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

Furthermore, the compound represented by the general formula (N-1-1) includes a compound group represented by the formula (N-1-1.1) to the formula (N-1-1.4), the formula (N- 1-1.11) to the compound group represented by formula (N-1-1.14), and from formula (N-1-1.20) to formula (N-1-1.22) It is preferably a compound selected from the group of compounds, preferably a compound represented by formulas (N-1-1.1) to (N-1-1.4), and represented by formula (N-1-1). .1) and compounds represented by formula (N-1-1.3) are preferred.

  Compounds represented by formula (N-1-1.1) to formula (N-1-1.4), represented by formula (N-1-1.11) to formula (N-1-1.14) The compounds represented by formula (N-1-1.20) to formula (N-1-1.22) 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 the liquid crystal composition according to this embodiment is 5%, 10%, 13%, 15%, and 17%. Yes, 20%, 23%, 25%, 27%, 30%, 33%, 35%. The upper limit of the preferred content is 50%, 40%, 38%, 35%, 33%, and 30% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7% Yes, 6%, 5%, 3%.

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

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

^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, a methyl group, a propyl group, a methoxy group, an ethoxy group, or a propoxy group. Or a butoxy group is preferable.

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

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

  The lower limit of the preferable content of the compound represented by the formula (N-1-2) with respect to the total amount of the liquid crystal composition according to this embodiment 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%, and 38% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% Yes, 10%, 8%, 7%, 6%, 5%.

Furthermore, the compound represented by the general formula (N-1-2) includes a group of compounds represented by the formula (N-1-2.1) to the formula (N-1-2.8), the formula (N- 1-2.10) to (N-1-2.13), and (N-1-2.20) to (N-1-2.22) The compound is preferably a compound selected from the group of compounds, from formula (N-1-2.3) to formula (N-1-2.8), formula (N-1-2.10), formula (N-1). -2.11), a formula (N-1-2.13), and a compound represented by formula (N-1-2.20) are preferable. When importance is placed on the improvement of Δε, formula (N The compound represented by formula (N-2.3) to formula (N-1-2.8) is preferable. When importance is attached to the improvement of T _ni , formula (N-1-2.10), formula (N -1-2.11) and formula (N-1-2. Preferably be a compound represented by 3), it is preferred when emphasizing improvement in response speed is a compound represented by the formula (N-1-2.20).

  Compounds represented by formula (N-1-2.1) to formula (N-1-2.8), represented by formula (N-1-2.10) to formula (N-1-2.13) The compounds represented by formula (N-1-2.20) to 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 the liquid crystal composition according to this embodiment is 5%, 10%, 13%, 15%, and 17%. Yes, 20%, 23%, 25%, 27%, 30%, 33%, 35%. The upper limit of the preferred content is 50%, 40%, 38%, 35%, 33%, and 30% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7% Yes, 6%, 5%, 3%.

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

In the formula, R ^N131 and R ^N132 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N-1).

^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 1-propenyl group, ethoxy group, propoxy group, or butoxy group is preferable. preferable.

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

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

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

Furthermore, the compound represented by the general formula (N-1-3) includes a compound group represented by the formula (N-1-3.1) to the formula (N-1-3.7), the formula (N- 1-3.10) to the compound group represented by formula (N-1-3.11) and the formula (N-1-3.20) to formula (N-1-3.21) It is preferably a compound selected from the group of compounds, and is a compound represented by Formulas (N-1-3.1) to (N-1-3.7) and Formula (N-1-3.21). It is preferable that 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-1-3.7), represented by formula (N-1-3.10) to formula (N-1-3.11) The compounds represented by formula (N-1-3.20) to formula (N-1-3.21) can be used alone or in combination, A combination of formula (N-1-3.1) and formula (N-1-3.2), formula (N-1-3.3), formula (N-1-3.4) and formula (N- A combination of two or three selected from 1-3.6) is preferable. The lower limit of the preferable content of these compounds alone or with respect to the total amount of the liquid crystal composition according to this embodiment is 5%, 10%, 13%, 15%, and 17%. Yes, 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 18%, 15%, 13%.

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

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

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

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

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

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

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

  A compound represented by formula (N-1-4.1) to formula (N-1-4.4), and formula (N-1-4.11) to formula (N-1-4.14) The compounds represented 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 the liquid crystal composition according to this embodiment is 3%, 5%, 7%, 10%, and 13%. Yes, 15%, 17%, 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 18%, 15%, 13%, 11%, 10%, 8%.

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

In the formula, R ^N151 and R ^N152 each independently represent the same meaning as R ^N11 and R ^N12 in General Formula (N-1).

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

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-1-5) with respect to the total amount of the liquid crystal composition according to the present embodiment is 5%, 8%, and 10%. 13%, 15%, 17%, 20%. The upper limit of the preferable content is 35%, 33%, 30%, 28%, 25%, and 23% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 20%, 18%, 15%, 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 formulas (N-1-5.1) to (N-1-5.6) 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 the liquid crystal composition according to this embodiment is 5%, 8%, 10%, 13%, and 15%. Yes, 17%, 20%. The upper limit of the preferable content is 35%, 33%, 30%, 28%, 25%, and 23% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 20%, 18%, 15%, 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. ^RN1102 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

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

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

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

Furthermore, the compound represented by the general formula (N-1-10) includes a compound group represented by the formula (N-1-10.1) to the formula (N-1-10.5), and the formula (N -1-10.11) to a compound selected from the group of compounds represented by formula (N-1-10.14), preferably from formula (N-1-10.1) to (N-1- It is preferable that it is a compound represented by 10.5), and the compound represented by Formula (N-1-10.1) and Formula (N-1-10.2) is preferable.

  A compound represented by formula (N-1-10.1) to formula (N-1-10.5), and formula (N-1-10.11) to formula (N-1-10.14) The compounds represented 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 the liquid crystal composition according to this embodiment is 5%, 10%, 13%, 15%, and 17%. Yes, 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 18%, 15%, 13%.

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

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

R ^N1111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group, a vinyl group, or a 1-propenyl group. ^RN1112 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

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

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

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

Furthermore, the compound represented by the general formula (N-1-11) includes a compound group represented by the formula (N-1-11.1) to the formula (N-1-11.5), and the formula (N -11.11) to a compound selected from the group of compounds represented by formula (N-1-11.14), preferably formula (N-1-11.2) and formula (N-1 -11.4) is preferred.

  A compound represented by formula (N-1-11.1) to formula (N-1-11.5), and formula (N-1-11.11) to formula (N-1-11.14) The compounds represented 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 the liquid crystal composition according to this embodiment is 5%, 10%, 13%, 15%, and 17%. Yes, 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 18%, 15%, 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 properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

  The lower limit of the preferable content of the compound represented by the formula (N-1-12) with respect to the total amount of the liquid crystal composition according to this embodiment is 5%, 10%, and 13%. 15%, 17%, and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 18%, 15%, 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 properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

^RN1141 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. ^RN1142 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

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

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

  The lower limit of the preferable content of the compound represented by the formula (N-1-14) with respect to the total amount of the liquid crystal composition according to this embodiment is 5%, 10%, and 13%. 15%, 17%, and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 18%, 15%, 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. R ^N1152 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-1-15) with respect to the total amount of the liquid crystal composition according to this embodiment is 5%, 10%, and 13%. 15%, 17%, and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 18%, 15%, 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 properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

  The lower limit of the preferable content of the compound represented by the formula (N-1-16) with respect to the total amount of the liquid crystal composition according to this embodiment is 5%, 10%, and 13%. 15%, 17%, and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 18%, 15%, 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 properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

R ^N1181 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group. ^RN1182 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

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

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

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

Furthermore, the compound represented by the general formula (N-1-18) is a compound selected from the group of compounds represented by the formula (N-1-18.1) to the formula (N-1-18.5). It is preferable that it is a compound represented by Formula (N-18.1) to (N-1-11.3), and Formula (N-1-18.2) and Formula (N The compound represented by 1-18.3) is preferable.

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

In the formula, R ^N1201 and R ^N1202 each independently represent the same meaning as R ^N11 and R ^N12 in General 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 properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

  The lower limit of the preferable content of the compound represented by the formula (N-1-20) with respect to the total amount of the liquid crystal composition according to this embodiment is 5%, 10%, and 13%. 15%, 17%, and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 18%, 15%, 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 properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

  The lower limit of the preferable content of the compound represented by the formula (N-1-21) with respect to the total amount of the liquid crystal composition according to this embodiment is 5%, 10%, and 13%. 15%, 17%, and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 18%, 15%, 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 properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

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

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

Furthermore, the compound represented by the general formula (N-1-22) includes the compound group represented by the formula (N-1-22.1) to the formula (N-1-22.6), and the formula (N It is preferably a compound selected from the group of compounds represented by formula (N-1-22.12) to formula (N-1-22.12), and formula (N-1-22.1) to (N-1- 22.5) is preferred, and compounds represented by formulas (N-1-22.1) to (N-1-22.4) are preferred.

In General Formula (N-2), R ^N21 and R ^N22 each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent —CH ₂ -may be each independently substituted by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-. R ^N21 and R ^N22 are each independently an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkenyl having 2 to 8 carbon atoms. An oxy group is preferable, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms is more preferable. An alkyl group having 1 to 5 atoms, an alkoxy group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms is more preferable, an alkyl group having 2 to 5 carbon atoms, and an alkoxy having 2 to 4 carbon atoms. Group or an alkenyl group having 2 to 3 carbon atoms is still more preferable, and an alkyl group having 2 to 5 carbon atoms is particularly preferable. The alkyl group, alkoxy group, alkenyl group and alkenyloxy group are preferably linear.

In the case where the ring structure to which R ^N21 and / or R ^N22 is bonded is an aromatic ring such as a benzene ring or a pyridazine ring, a linear alkyl group having 1 to 5 carbon atoms, a linear carbon atom An alkoxy group having 1 to 4 carbon atoms and an alkenyl group having 4 to 5 carbon atoms are preferable, and when the ring structure to which the alkoxy group is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, the number of linear carbon atoms A 1-5 alkyl group, a linear C1-C4 alkoxy group, and a linear C2-C5 alkenyl group 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.)

In particular, when the ring structure to which R ^N21 and / or R ^N22 is bonded is a saturated ring structure, formulas (R1) to (R3) are preferable, and the ring structure to which R ^N21 and / or R ^N22 is bonded is an aromatic ring. In this case, the formula (R4) or (R5) is preferable.

In general formula (N-2), A ^N21 and A ^N22 are each independently
(A) 1,4-cyclohexylene group, (this is present in the group one -CH ₂ - - or nonadjacent two or more -CH ₂ may be replaced by -O-.)
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be substituted with —N═),
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be substituted with —N═. ), And (d) represents a group selected from the group consisting of 1,4-cyclohexenylene groups, and the above groups (a), (b), (c) and (d) are each independently It may be substituted with a cyano group, a fluorine atom or a chlorine atom. A ^N21 and A ^N22 are preferably aromatic when it is required to independently increase Δn, and are preferably aliphatic for improving the response speed. 4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group, 2 , 3-difluoro-1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1,4-diyl group, naphthalene-2,6 -It preferably represents a diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, and more preferably represents the following structure: ,

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

In General Formula (N-2), Z ^N21 and Z ^N22 each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C— are represented. Z ^N21 and ^{Z N22} are each _{independently -CH} 2 and _{O -, - CF 2 O -} , - CH 2 CH 2 -, - CF 2 CF 2 - or preferably a single bond, _-CH 2 O- , —CH ₂ CH ₂ — or a single bond is more preferable, and —CH ₂ O— or a single bond is particularly preferable.

In General Formula (N-2), n ^N21 and n ^N22 each independently represent an integer of 0 to 3, and n ^N21 + n ^N22 is 1, 2 or 3. n ^N21 + n ^N22 is preferably 1 or 2, and a combination in which n ^N21 is 1 and n ^N22 is 0, and a combination in which n ^N21 is 2 and n ^N22 is 0 are preferable.

  The lower limit of the preferable content of the compound represented by the formula (N-2) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. The upper limit of preferable content is 20%, 15%, and 13%.

When the liquid crystal composition according to the present embodiment requires a liquid crystal composition having a low viscosity and a high response speed, the lower limit value is preferably low and the upper limit value is preferably low. Furthermore, when the liquid crystal composition according to the present embodiment maintains a high T _ni and a liquid crystal composition having good temperature stability, the lower limit value is preferably low and the upper limit value is preferably low. Further, 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 high and the upper limit value is high.

  In the liquid crystal composition according to the present embodiment, the preferred content ratio of the compound represented by the formula (N-2) to the compound represented by the formula (N-1) is the formula ( N-1) is 0.01, 0.05, 0.1, 0.2, 0.3, 0.5, assuming that the total amount of the compound represented by N-1) is 1. . Preferably, it is 0.01, 0.05, 0.1, 0.2, and 0.3.

As a compound represented by general formula (N-2), the compound group represented by the following general formula (N-2a)-(N-2g) can be mentioned.

^{Wherein, R N21} and ^{R N22} are the same meaning as ^{R N21} and ^{R N22} in the general formula ^{(N-2), n Na22} represents 0 or ^{1, n Nb21} represents 0 or 1, n ^Nc21 represents 0 or ^{1, n Nd21} represents 0 or ^{1, n NE21} represents 1 or ^{2, n Nf22} represents 1 or ^{2, n Ng21} represents 1 or 2, a ^Ne21 represents a trans-1,4-cyclohexylene group or a 1,4-phenylene group, and A ^Ng21 represents a trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group, or 1,4. ^{-Represents a} phenylene group, but at least one represents a 1,4-cyclohexenylene group, Z ^Ne21 represents a single bond or ethylene, but at least one represents ethylene.

  More specifically, the compound represented by the general formula (N-2) includes a compound group represented by the general formulas (N-2-1) to (N-2-5), and the general formula (N-2). -10) to (N-2-18) and a compound selected from the general formulas (N-2-20) to (N-2-22) preferable.

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

^{Wherein, R N211} and ^{R N212} are each independently the same meaning as ^{R N21} and ^{R N22} in the general formula (N-2).

R ^N211 and ^{R N212} are each independently preferably an alkyl group having 1 to 5 carbon atoms, a methyl group, an ethyl group, a propyl group, or butyl group is preferred.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-1) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

Furthermore, the compound represented by the general formula (N-2-1) is a compound selected from the compound group represented by the formula (N-2-1.1) to the formula (N-2-1.6). It is preferable that the compound represented by the formula (N-2-1.1) is preferable.

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

^{Wherein, R N221} and ^{R N222} are each independently the same meaning as ^{R N21} and ^{R N22} in the general formula (N-2).

^RN221 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group. ^RN222 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by the formula (N-2-2) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

Furthermore, the compound represented by General Formula (N-2-2) is preferably a compound represented by Formula (N-2-2.1) to Formula (N-2-2.10), A compound represented by the formula (N-2-2.1) is preferable.

The compound represented by the general formula (N-2-3) is the following compound.

^{Wherein, R N231} and ^{R N232} are each independently the same meaning as ^{R N21} and ^{R N22} in the general formula (N-2).

^RN231 is preferably an alkyl group having 1 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN232 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by the formula (N-2-3) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

Furthermore, the compound represented by General Formula (N-2-3) is preferably a compound represented by Formula (N-2-3.1) to Formula (N-2-3.8).

The compound represented by the general formula (N-2-4) is the following compound.

In the formula, R ^N241 and R ^N242 each independently represent the same meaning as R ^N21 and R ^N22 in General Formula (N-2).

^RN241 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group. ^RN242 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-4) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

Furthermore, the compound represented by General Formula (N-2-4) is preferably a compound represented by Formula (N-2-4.1) to Formula (N-2-4.12).

The compound represented by general formula (N-2-5) is the following compound.

In the formula, R ^N251 and R ^N252 each independently represent the same meaning as R ^N21 and R ^N22 in General Formula (N-2).

^RN251 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group. R ^N252 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-5) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

Furthermore, the compound represented by General Formula (N-2-5) is preferably a compound represented by Formula (N-2-5.1) to Formula (N-2-5.6).

The compound represented by general formula (N-2-10) is the following compound.

In the formula, R ^N2101 and R ^N2102 each independently represent the same meaning as R ^N21 and R ^N22 in General Formula (N-2).

^RN2101 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN2102 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-10) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

The compound represented by general formula (N-2-11) is the following compound.

In the formula, R ^N2111 and R ^N2112 each independently represent the same meaning as R ^N21 and R ^N22 in General Formula (N-2).

^RN2111 is preferably an alkyl group having 1 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN2112 is preferably an alkyl group having 1 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-11) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

The compound represented by general formula (N-2-12) is the following compound.

In the formula, R ^N2121 and R ^N2122 each independently represent the same meaning as R ^N21 and R ^N22 in General Formula (N-2).

^RN2121 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group. ^RN2122 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-12) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

The compound represented by general formula (N-2-13) is the following compound.

In the formula, R ^N2131 and R ^N2132 each independently represent the same meaning as R ^N21 and R ^N22 in General Formula (N-2).

^RN2131 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN2132 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-13) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

The compound represented by general formula (N-2-14) is the following compound.

In the formula, R ^N2141 and R ^N2142 each independently represent the same meaning as R ^N21 and R ^N22 in General Formula (N-2).

^RN2141 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN2142 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-14) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

The compound represented by general formula (N-2-15) is the following compound.

In the formula, R ^N2151 and R ^N2152 each independently represent the same meaning as R ^N21 and R ^N22 in formula (N-2).

^RN2151 is preferably an alkyl group having 1 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN2152 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-15) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

The compound represented by general formula (N-2-16) is the following compound.

In the formula, R ^N2161 and R ^N2162 each independently represent the same meaning as R ^N21 and R ^N22 in Formula (N-2).

^RN2161 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group. ^RN2162 is preferably an alkyl group having 1 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-16) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

The compound represented by general formula (N-2-17) is the following compound.

In the formula, R ^N2171 and R ^N2172 each independently represent the same meaning as R ^N21 and R ^N22 in formula (N-2).

^RN2171 is preferably an alkyl group having 1 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN2172 is preferably an alkyl group having 1 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-17) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

The compound represented by the general formula (N-2-18) is the following compound.

^{Wherein, R N2181} and ^{R N2182} each independently represents the same meaning as ^{R N21} and ^{R N22} in the general formula (N-2).

^RN2181 is preferably an alkyl group having 1 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN2182 is preferably an alkyl group having 1 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-18) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

The compound represented by general formula (N-2-20) is the following compound.

In the formula, R ^N2201 and R ^N2202 each independently represent the same meaning as R ^N21 and R ^N22 in General Formula (N-2).

^RN2201 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group. ^RN2202 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by the formula (N-2-20) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

The compound represented by general formula (N-2-21) is the following compound.

In the formula, R ^N2211 and R ^N2212 each independently represent the same meaning as R ^N21 and R ^N22 in General Formula (N-2).

R ²²¹¹ is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, or a butyl group. ^RN2212 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by Formula (N-2-21) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

The compound represented by the general formula (N-2-22) is the following compound.

In the formula, R ^N2221 and R ^N2222 each independently represent the same meaning as R ^N21 and R ^N22 in General Formula (N-2).

^RN2221 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN2222 is preferably an alkyl group having 1 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group.

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

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

  The lower limit of the preferable content of the compound represented by the formula (N-2-22) with respect to the total amount of the liquid crystal composition according to this embodiment is 1%, 3%, and 5%. . The upper limit of the preferable content is 20%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment.

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).

In the formula, 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 -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-
n ^L1 represents 0, 1, 2 or 3,
A ^L1 , A ^L2 and A ^L3 are each independently
(A) 1,4-cyclohexylene group, (this is present in the group one -CH ₂ - - or nonadjacent two or more -CH ₂ may be replaced by -O-.)
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be substituted with —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, (One -CH = present in a 2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent -CH = may be substituted with -N =.)
The group (a), the group (b) and the group (c) may be each independently substituted with a cyano group, a fluorine atom or a chlorine atom,
Z ^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 from each other, and when n ^L1 is 2 or 3, and a plurality of Z ^L2 are present, They may be the same or different from each other, but exclude the compound represented by the general formula (N-1).

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

  In the liquid crystal composition according to this embodiment, the content of the compound represented by the general formula (L) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, and drop marks. Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

  The lower limit of the preferable content of the compound represented by the formula (L) with respect to the total amount of the liquid crystal composition according to the present embodiment is 1%, 10%, 20%, and 30%. Yes, 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 the composition of the liquid crystal composition according to the present embodiment is required to have a low viscosity and a high response speed, the above lower limit value is preferably high and the upper limit value is preferably high. Furthermore, when a composition having a high temperature stability and a high temperature stability is required, it is preferable that the lower limit value is high and the upper limit value 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) 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).)

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

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

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

When the composition of the liquid crystal composition according to the present embodiment is required to have a low viscosity and a high response speed, the above lower limit value is preferably high and the upper limit value is preferably high. Moreover, maintaining high T _ni of the liquid crystal composition according to the present embodiment, 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 the general formula (L-1).

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

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

  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 liquid crystal composition according to this embodiment is 1%, 5%, and 10%. 15%, 17%, 20%, 23%, 25%, 27%, 30%, 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, and 40% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 38%, 35%, 33%, 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 liquid crystal composition according to this embodiment is particularly improved. Further, when seeking a higher _{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 solubility at low temperature, the content of the compound represented by the formula (L-1-2.3) and the formula (L-1-2.4) is not preferably 30% or more.

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

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

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

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

R ^L13 and R ^L14 are preferably 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 Formula (L-1-3) with respect to the total amount of the liquid crystal composition according to the present embodiment is 1%, 5%, and 10%. 13%, 15%, 17%, 20%, 23%, 25%, 30%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 40%, and 37% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 35%, 33%, 30%, 27%, 25%, 23%, 23%, 20%, 17%, 15%, 13% Yes, 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 liquid crystal composition according to this embodiment is particularly improved. Further, when seeking a higher _{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 solubility at low temperatures.

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

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

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

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

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

  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 liquid crystal composition according to this embodiment is 1%, 5%, and 10%. 13%, 15%, 17%, 20%. The upper limit of the preferable content is 25%, 23%, 20%, 17%, 15%, and 13% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 10%.

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 liquid crystal composition according to this embodiment is 1%, 2%, 3% 5%, 7%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferable content is 20%, 17%, 15%, 13%, 10%, and 8% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 7%, 6%.

  Formula (L-1-1.3), Formula (L-1-2.2), Formula (L-1-3.1), Formula (L-1-3.3), Formula (L-1- 3.4), two or more compounds selected from the compounds represented by formula (L-1-3.11) and formula (L-1-3.12) are preferably combined. -1.3), formula (L-1-2.2), formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4) and It is preferable to combine two or more compounds selected from the compounds represented by the formula (L-1-4.2), and the lower limit of the preferable content of the total content of these compounds is related to the present embodiment. 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, and 18% with respect to the total amount of the liquid crystal composition %, 20%, 2 %, 25%, 27%, 30%, 33%, and 35%, and the upper limit is 80% with respect to the total amount of the liquid crystal composition according to the present embodiment. 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 formulas (L-1-1.3) and (L-1-2.2) when importance is attached to the response speed of the composition. It is preferable to combine two or more compounds selected from the following compounds.

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

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

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

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

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

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

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

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

  When emphasizing solubility at low temperatures, the effect is high when the content is set high. On the contrary, when emphasizing the response speed, 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 liquid crystal composition according to the present embodiment is 1%, 2%, 3%, 5 %, 7%, and 10%. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, and 7% with respect to the total amount of the liquid crystal composition according to the present embodiment. Yes, 6%, 5%, 3%.

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

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

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

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

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

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

When a high birefringence is obtained, the effect is high when the content is set high. On the contrary, when the high T _ni is emphasized, the effect is high when the content is set low. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

Furthermore, the compound represented by the general formula (L-3) is preferably a compound selected from the group of compounds represented by the formula (L-3.1) to the formula (L-3.4). A compound represented by formula (L-3.7) from (L-3.2) 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 the general formula (L).

R ^L41 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L42 is 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 is preferred. )

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

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

  The lower limit of the preferable content of the compound represented by the formula (L-4) with respect to the total amount of the liquid crystal composition according to this embodiment 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 liquid crystal composition according to the present embodiment is 50%, 40%, 35%, 30 %, 20%, 15%, 10%, 5%.

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

  Depending on the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., even if the compound represented by the formula (L-4.1) is contained, the formula (L Even if the compound represented by -4.2) is contained, both the compound represented by formula (L-4.1) and the compound represented by formula (L-4.2) are contained. Or all of the compounds represented by formula (L-4.1) to formula (L-4.3) may be included. The lower limit of the preferable content of the compound represented by the formula (L-4.1) or the formula (L-4.2) with respect to the total amount of the liquid crystal composition according to this embodiment is 3%, 5%, 7%, 9%, 11%, 12%, 13%, 18%, 21%, and a 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, the total amount of the liquid crystal composition according to this embodiment is The lower limit of the preferred content of both compounds is 15%, 19%, 24%, 30%, and the preferred upper limit is 45, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%.

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

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

  The lower limit of the preferable content of the compound represented by the formula (L-4.4) or the formula (L-4.5) with respect to the total amount of the liquid crystal composition according to this embodiment is 3%, 5%, 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, the total amount of the liquid crystal composition according to this embodiment is The lower limit of the preferred content of both compounds is 15%, 19%, 24%, 30%, and the preferred upper limit is 45, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%.

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

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

In the formula, R ^L51 and R ^L52 each independently represent the same meaning as R ^L1 and R ^L2 in 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 An alkoxy group having 1 to 4 carbon atoms is preferred.

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

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

  The lower limit of the preferable content of the compound represented by the formula (L-5) with respect to the total amount of the liquid crystal composition according to this embodiment 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 Formula (L-5) with respect to the total amount of the liquid crystal composition according to this embodiment is 50%, 40%, 35%, 30 %, 20%, 15%, 10%, 5%

  The compound represented by General Formula (L-5) is preferably a compound represented by Formula (L-5.1) or Formula (L-5.2), and in particular, Formula (L-5. It is preferable that it is a compound represented by 1).

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

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

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

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

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

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

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

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

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

  The lower limit of the preferable content of the compound represented by the formula (L-6) with respect to the total amount of the liquid crystal composition according to this embodiment 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 liquid crystal composition according to this embodiment is 50%, 40%, 35%, 30 %, 20%, 15%, 10%, 5%. When emphasizing to increase Δn, it is preferable to increase the content, and when emphasizing the precipitation at low temperature, it is preferable to decrease the content.

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

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

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

  The lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition according to this embodiment 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.

In the formula, R ^L71 and R ^L72 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L), and A ^L71 and A ^L72 each independently represent A ^L2 in General Formula (L). And the same meaning as A ^L3 , but the hydrogen atoms on A ^L71 and A ^L72 may be each independently substituted with a fluorine atom, and Z ^L71 has the same meaning as Z ^L2 in formula (L) X ^L71 and X ^L72 each independently represent a fluorine atom or a hydrogen atom.

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 represents a 1,4-cyclohexylene group or a 1,4-phenylene group, and the hydrogen atoms on A ^L71 and A ^L72 may each independently be substituted with a fluorine atom, and Z ^L71 A single bond or COO- is preferable, a single bond is preferable, and X ^L71 and X ^L72 are preferably a hydrogen atom.

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

  In the liquid crystal composition according to this embodiment, the content of the compound represented by the general formula (L-7) is low temperature solubility, transition temperature, electrical reliability, birefringence, process suitability, It is necessary to adjust appropriately according to required performance such as dripping marks, image sticking, and dielectric anisotropy.

  The lower limit of the preferable content of the compound represented by the formula (L-7) with respect to the total amount of the liquid crystal composition according to this embodiment 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 liquid crystal composition according to this embodiment is 30%, 25%, 23%, 20 %, 18%, 15%, 10%, 5%.

When an embodiment with a high T _ni is desired for the liquid crystal composition according to this embodiment, it is preferable to increase the content of the compound represented by formula (L-7), and an embodiment with a low viscosity is desired. In such a case, it is preferable to lower the content.

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).

  The lower limit of the total preferable content of the compounds represented by the general formula (N-1), the general formula (N-2), and the general formula (L) with respect to the total amount of the liquid crystal composition according to the present embodiment is 80%, 85%, 88%, 90%, 92%, 93%, 93%, 94%, 95%, 96%, 97% 98%, 99% and 100%. The upper limit of the preferable content is 100%, 99%, 98%, and 95%.

  General formulas (N-1-1) to (N-1-22), general formulas (N-2-1) to (N-2-22) with respect to the total amount of the liquid crystal composition according to the present embodiment, And the lower limit of the preferable total content of the compounds represented by formulas (L-1) to (L-8) 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%.

  Formulas (N-1-1.1) to (N-1-22.12) and Formulas (N-2-1.1) to (N-2) with respect to the total amount of the liquid crystal composition according to this embodiment. -5.6), compounds represented by general formulas (L-1-1.1) to (L-1-6.3), and formulas (L-2.1) to (L-7.53) The lower limit value of the total preferable content is 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95% 96%, 97%, 98%, 99%, 100%. The upper limit of the preferable content is 100%, 99%, 98%, and 95%.

  The liquid crystal composition according to this embodiment 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 liquid crystal composition, the content of the compound having a carbonyl group is preferably 5% or less, and preferably 3% or less with respect to the total mass of the liquid crystal composition. Is more preferably 1% or less, and most preferably not substantially contained.

  When importance is attached to 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 liquid crystal composition, It is preferably 8% or less, more preferably 5% or less, further 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 based on the total mass of the liquid crystal composition. It is preferably 80% or more, more preferably 90% or more, still more preferably 95% or more, and the liquid crystal composition is composed only of a compound in which all of the ring structures in the molecule are substantially 6-membered rings. Is most preferable.

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

When emphasizing the improvement of viscosity and the improvement of T _ni , the content of the compound having a 2-methylbenzene-1,4-diyl group in the molecule in which hydrogen atoms may be substituted with halogens should be reduced. 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 liquid crystal composition. 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.

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

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

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

In the formula, X ²⁰¹ and X ²⁰² each independently represent a hydrogen atom or a methyl group,
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 — (wherein _s represents an integer of 2 to 7, Represents an aromatic ring)),
Z ²⁰¹ represents —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —CF ₂ O—, —OCF ₂ —, —CH ₂ CH ₂ —, —CF ₂ CF ₂ —, —CH = CH-COO -, - CH = CH-OCO -, - COO-CH = CH -, - OCO-CH = CH -, - COO-CH 2 CH 2 -, - OCO-CH 2 CH 2 -, - CH ₂ CH ₂ —COO—, —CH ₂ CH ₂ —OCO—, —COO—CH ₂ —, —OCO—CH ₂ —, —CH ₂ —COO—, —CH ₂ —OCO—, —CY ¹ = CY ² -(Wherein Y ¹ and Y ² each independently represents a fluorine atom or a hydrogen atom), -C≡C- or a single bond;
M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond, and all of the 1,4-phenylene groups in the formula have an arbitrary hydrogen atom substituted by a fluorine atom. May be. ) Is preferred.

X ²⁰¹ and X ²⁰² are both preferably diacrylate derivatives each representing a hydrogen atom and both dimethacrylate derivatives having a methyl group, and are preferably asymmetric compounds 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 at least one of the PSA display elements is a single bond. It is preferable that both of them represent a single bond or an embodiment in which one represents a single bond and the other represents an alkylene group having 1 to 8 carbon atoms or —O— (CH ₂ ) _s —. 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 a 1,4-phenylene group or a single bond Is preferred. When M ²⁰¹ represents a ring structure other than a single bond, Z ²⁰¹ is preferably a linking group other than a single bond, and 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, compounds represented by the general formula (XX-1) to the general formula (XX-4) are particularly preferable, and among them, the compound represented by the general formula (XX-2) is the most. preferable.

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

  In the case where a monomer is added to the liquid crystal composition according to this embodiment, the polymerization proceeds even when no polymerization initiator is present, but a polymerization initiator may be contained in order to accelerate the polymerization. Examples of the polymerization initiator include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides, and the like.

The liquid crystal composition according to the present embodiment can 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 It represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a single bond.

R ^Q represents a linear alkyl group having 1 to 22 carbon atoms or a branched alkyl group, and one or more CH ₂ groups in the alkyl group are- O—, —CH═CH—, —CO—, —OCO—, —COO—, —C≡C—, —CF ₂ O—, —OCF ₂ — may be substituted. A linear alkyl group, a linear alkoxy group, a linear alkyl group in which one CH ₂ group is substituted with —OCO— or —COO—, a branched alkyl group, a branched alkoxy group, and one CH ₂ group is — OCO- or branched chain alkyl group is preferable substituted -COO-, a straight-chain alkyl group having 1 to 20 carbon atoms, one straight chain alkyl group CH ₂ group is substituted -OCO- or -COO- in A branched alkyl group, a branched alkoxy group, one C ₂ group is branched-chain alkyl group substituted -OCO- or -COO- in more preferred. ^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 alkyl group or branched alkyl group having 1 to 10 carbon atoms, and R ^Q2 is preferably a linear alkyl group or branched alkyl group having 1 to 20 carbon atoms. ^Q3 is preferably a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group, a linear alkoxy group or a branched alkoxy group, and L ^Q is a linear alkylene group having 1 to 8 carbon atoms or a branched chain. An alkylene group is preferred. 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 liquid crystal composition according to this embodiment, the compound represented by the general formula (Q) preferably contains one or two compounds, more preferably contains one to five compounds, and the content is 0. It is preferably 0.001 to 1%, more preferably 0.001 to 0.1%, and particularly preferably 0.001 to 0.05%.

In addition, the compounds represented by the following (III-1) to (III-40) are more preferable as antioxidants or light stabilizers that can be blended in the liquid crystal composition according to this embodiment.

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

  The liquid crystal composition according to this embodiment preferably contains one or more compounds represented by the general formula (Q) or compounds selected from the general formulas (III-1) to (III-40). It is more preferable to contain 1 to 5 types, and the content is preferably 0.001 to 1%, more preferably 0.001 to 0.1%, based on the total mass of the liquid crystal composition. 0.001 to 0.05% is particularly preferable.

  The liquid crystal composition containing the polymerizable compound according to the present embodiment (hereinafter, also referred to as “polymerizable compound-containing liquid crystal composition”) has a liquid crystal alignment ability due to polymerization of the polymerizable compound contained therein by ultraviolet irradiation. And used for a liquid crystal display element that controls the amount of transmitted light using the birefringence of the composition. As liquid crystal display elements, AM-LCD (active matrix liquid crystal display element), TN (nematic liquid crystal display element), STN-LCD (super twisted nematic liquid crystal display element), OCB-LCD and IPS-LCD (in-plane switching liquid crystal display element) However, it is particularly useful for AM-LCDs, and can be used for transmissive or reflective liquid crystal display elements.

  The two substrates of the liquid crystal cell used in the liquid crystal display element according to the present embodiment can use a transparent material having flexibility such as glass or plastic, and one of them can be an opaque material such as silicon. A transparent substrate having a transparent electrode layer can be obtained, for example, by sputtering indium tin oxide (ITO) on a transparent substrate such as a glass plate.

  The color filter can be prepared by, for example, a pigment dispersion method, a printing method, an electrodeposition method, or a dyeing method. A method for producing a color filter by a pigment dispersion method will be described as an example. A curable coloring composition for a color filter is applied on the transparent substrate, subjected to 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 created. In addition, a pixel electrode provided with an active element such as a TFT, a thin film diode, or a metal insulator metal specific resistance element may be provided on the substrate.

  The said board | substrate is made to oppose so that a transparent electrode layer may become an inner side. In that case, you may adjust the space | interval of a board | substrate through a spacer. At this time, it is preferable to adjust so that the thickness of the light control layer obtained may be set to 1-100 micrometers. More preferably, the thickness is 1.5 to 10 μm. When a polarizing plate is used, it is preferable to adjust the product of the refractive index anisotropy Δn of the liquid crystal and the cell thickness d so that the contrast is maximized. In addition, when there are two polarizing plates, the polarizing axis of each polarizing plate can be adjusted so that the viewing angle and contrast are good. Furthermore, a retardation film for widening the viewing angle can also be used. Examples of the spacer include columnar spacers made of glass particles, plastic particles, alumina particles, a photoresist material, and the like. Thereafter, a sealant such as an epoxy thermosetting composition is screen-printed on the substrates with a liquid crystal inlet provided, the substrates are bonded together, and heated to thermally cure the sealant.

  As a method of sandwiching the polymerizable compound-containing liquid crystal composition between the two substrates, a normal vacuum injection method or an ODF method can be used. Although it has a problem that leaves traces, in the present invention, it can be suitably used for a display element manufactured by using the ODF method. In the ODF liquid crystal display device manufacturing process, a sealant such as epoxy photothermal combination curing is drawn on a backplane or frontplane substrate using a dispenser in a closed-loop bank shape, and then removed. A liquid crystal display element can be manufactured by bonding a front plane and a back plane after dropping a predetermined amount of the composition under air. The liquid crystal composition according to this embodiment can be suitably used because the composition can be stably dropped in the ODF process.

  As a method for polymerizing a polymerizable compound, an appropriate polymerization rate is desirable in order to obtain good alignment performance of liquid crystals. Therefore, active energy rays such as ultraviolet rays or electron beams are irradiated singly or in combination or sequentially. The method of polymerizing by is preferred. When ultraviolet rays are used, a polarized light source or a non-polarized light source may be used. In addition, when the polymerization is performed in a state where the polymerizable compound-containing liquid crystal composition is sandwiched between two substrates, at least the substrate on the irradiation surface side must be given appropriate transparency to the active energy rays. I must. Moreover, after polymerizing only a specific part using a mask during light irradiation, the orientation state of the unpolymerized part is changed by changing conditions such as an electric field, a magnetic field, or temperature, and further irradiation with active energy rays is performed. Then, it is possible to use a means for polymerization. In particular, when ultraviolet exposure is performed, it is preferable to perform ultraviolet exposure while applying an alternating electric field to the polymerizable compound-containing liquid crystal composition. The alternating electric field to be applied is preferably an alternating current having a frequency of 10 Hz to 10 kHz, more preferably a frequency of 60 Hz to 10 kHz, and the voltage is selected depending on a desired pretilt angle of the liquid crystal display element. That is, the pretilt angle of the liquid crystal display element can be controlled by the applied voltage. In a horizontal electric field type MVA mode liquid crystal display element, the pretilt angle is preferably controlled from 80 degrees to 89.9 degrees from the viewpoint of alignment stability and contrast.

The temperature during irradiation is preferably within a temperature range in which the liquid crystal state of the liquid crystal composition according to the present embodiment is maintained. Polymerization is preferably performed at a temperature close to room temperature, that is, typically at a temperature of 15 to 35 ° C. As a lamp for generating ultraviolet rays, a metal halide lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like can be used. Moreover, as a wavelength of the ultraviolet-ray to irradiate, it is preferable to irradiate the ultraviolet-ray of the wavelength range which is not the absorption wavelength range of a composition, and it is preferable to cut and use an ultraviolet-ray as needed. Intensity of ultraviolet irradiation is ^preferably from ^{0.1mW / cm 2 ~100W / cm 2} , 2mW / cm 2 ~50W / cm 2 is more preferable. The amount of energy of ultraviolet rays to be irradiated can be adjusted as appropriate, but is preferably 10 mJ / cm ² to 500 J / cm ^{2, and} more preferably 100 mJ / cm ² to 200 J / cm ² . When irradiating with ultraviolet rays, the intensity may be changed. The time for irradiating with ultraviolet rays is appropriately selected depending on the intensity of the irradiating ultraviolet rays.

  The liquid crystal display element using the liquid crystal composition according to the present embodiment is useful for achieving both high-speed response and suppression of display failure. In particular, the liquid crystal display element is useful for a liquid crystal display element for driving an active matrix. It can be applied to liquid crystal display elements for mode, PSA mode, FFS mode, IPS mode or ECB mode.

  EXAMPLES The present invention will be described in further detail with reference to examples below, but the present invention is not limited to these examples. Moreover, the unit of each component in the following table | surface means "mass%."

Each liquid crystal composition of Examples 1 to 5 and Comparative Examples 1 to 3 containing each component shown in Table 1 and Table 2 was prepared by a conventional method, and the following characteristics were measured for the obtained liquid crystal composition. did.
T _ni : Nematic phase-isotropic liquid phase transition temperature (° C.)
Δn: Refractive index anisotropy at 20 ° C. Δε: Dielectric anisotropy at 20 ° C. η: Viscosity at 20 ° C. (mPa · s)
γ ₁ : rotational viscosity at 20 ° C. (mPa · s)
Vth: A voltage in which liquid crystal is sealed in a TN cell having a thickness of 6 microns, and the transmittance changes by 10% at 20 ° C. under a crossed Nicol polarizing plate.
VHR: Voltage holding ratio (%) at 60 ° C. under conditions of frequency 60 Hz and applied voltage 5 V
After heat resistance test VHR: TEG (test element group) for evaluation of electro-optical properties in which a composition sample was sealed was held in a thermostatic bath at 130 ° C. for 1 hour, and then measured under the same conditions as in the VHR measurement method described above.
The results are shown in Table 2.

  All of the liquid crystal compositions of Examples 1 to 5 had large absolute values of dielectric anisotropy (Δε) and low viscosity (η). On the other hand, in Comparative Example 1 (Example 6 of Patent Document 2) and Comparative Example 2 (Composition A of Patent Document 2) not containing the compound represented by the general formula (N-1), the viscosity (η) Was relatively high. In Comparative Example 3 in which the compound represented by the general formula (N-2) was removed from the composition of Example 1, the absolute value of dielectric anisotropy (Δε) was small.

  From the above, it was confirmed that the liquid crystal composition according to this embodiment is excellent in both characteristics of dielectric anisotropy (Δε) and viscosity (η).

Claims (4)

Formula (N-1):

(Where
R ^N11 and R ^N12 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently May be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
A ^N11 and A ^N12 each independently represent (a) a 1,4-cyclohexylene group (one —CH ₂ — present in the group or two or more —CH ₂ — not adjacent to each other is — O-) may be substituted.
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be substituted with —N═),
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be substituted with —N═. ), And (d) represents a group selected from the group consisting of 1,4-cyclohexenylene groups, and the groups (a), (b), (c) and (d) are independent of each other. May be substituted with a cyano group, a fluorine atom or a chlorine atom,
Z ^N11 and Z ^N12 each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, — OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—
n ^N11 and n ^N12 each independently represent an integer of 0 to 3, and n ^N11 + n ^N12 is 1, 2 or 3,
When there are a plurality of A ^N11 and A ^N12 , Z ^N11 and Z ^N12 , each may be the same as or different from each other. At least one compound represented by
Formula (N-2):

(Where
R ^N21 and R ^N22 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 _2. ═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO— may be substituted,
A ^N21 and A ^N22 are each independently
(A) 1,4-cyclohexylene group, (this is present in the group one -CH ₂ - - or nonadjacent two or more -CH ₂ may be replaced by -O-.)
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be substituted with —N═),
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be substituted with —N═. ), And (d) represents a group selected from the group consisting of 1,4-cyclohexenylene groups, and the groups (a), (b), (c) and (d) are independent of each other. May be substituted with a cyano group, a fluorine atom or a chlorine atom,
Z ^N21 and Z ^N22 each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, — OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—
n ^N21 and n ^N22 each independently represent an integer of 0 to 3, n ^N21 + n ^N22 is 1, 2 or 3,
When there are a plurality of A ^N21 and A ^N22 , Z ^N21 and Z ^N22 , each may be the same as or different from each other. A liquid crystal composition containing at least one kind of compound represented by: Formula (L):

(Where
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 —CH _2. ═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO— may be substituted,
n ^L1 represents 0, 1, 2 or 3,
A ^L1 , A ^L2 and A ^L3 are each independently
(A) 1,4-cyclohexylene group, (this is present in the group one -CH ₂ - - or nonadjacent two or more -CH ₂ may be replaced by -O-.)
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be substituted with —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, (One -CH = present in a 2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent -CH = may be substituted with -N =.)
The group (a), the group (b) and the group (c) are each 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 from each other, and when n ^L1 is 2 or 3, and a plurality of Z ^L2 are present, They may be the same or different from each other, but exclude the compound represented by the general formula (N-1). )
The liquid crystal composition according to claim 1, further comprising a compound represented by:   The liquid crystal composition of Claim 1 or 2 which contains 1-20 mass% of compounds represented by the said general formula (N-2) on the basis of the total amount of a liquid crystal composition. A liquid crystal display element provided with two substrates and the liquid-crystal layer containing the liquid-crystal composition of any one of Claims 1-3 provided between these two substrates.