JP4899288B2 - Nematic liquid crystal composition - Google Patents

Description

  The present invention relates to a nematic crystal composition useful as an electro-optical liquid crystal display material, and a liquid crystal display device using the same.

  Due to the excellent display quality, active matrix liquid crystal display devices are put on the market for portable terminals, liquid crystal televisions, projectors, computers and the like. In the active matrix display method, TFT (thin film transistor) or MIM (metal insulator metal) is used for each pixel, and high voltage holding ratio is regarded as important for this method. Also, in order to obtain a wider viewing angle characteristic, a TFT display combined with IPS and OCB modes and a reflection type of ECB mode have been proposed to obtain a brighter display. In order to cope with such display elements, new liquid crystal compounds or liquid crystal compositions have been proposed (Patent Document 1 and Patent Document 2).

In recent years, there has been a growing demand for liquid crystal compositions having a large refractive index anisotropy (Δn) and a large dielectric anisotropy (Δε) for reasons such as higher performance of liquid crystal projectors and application to the OCB mode.
In order to obtain a composition having a high Δn, it is common to use a tolan compound, a biphenyl compound or a terphenyl compound having a large Δn value. However, when a biphenyl compound or a terphenyl compound is used alone, Δn is not sufficiently large, and when combined with a tolan compound, the solubility is lowered. Construction of the composition was extremely difficult. In addition, it is difficult to increase Δε in addition to introducing a cyano group at the end of a combination of a tolan compound and a biphenyl compound or a terphenyl compound, and the high voltage holding required for an active matrix liquid crystal display device is difficult. The rate could not be achieved.

It has been proposed to use naphthalene compounds as a method for solving some of the above problems (Patent Documents 3 and 4). However, in these examples, cyano compounds are still used to obtain high Δn. Had problems.
From the above, it has been difficult to obtain a liquid crystal composition for an active matrix liquid crystal display device having a stable nematic phase at a low temperature and a high dielectric anisotropy while maintaining a high refractive index anisotropy. It was.

JP-A-2-233626 Special Publication 4-501575 Publication JP 2001-040354 A JP 2002-356679 A

  The problem to be solved by the present invention is to provide a liquid crystal composition for an active matrix liquid crystal display device having a stable nematic phase at a low temperature and having a high dielectric anisotropy while maintaining a high refractive index anisotropy. It is another object of the present invention to provide an active matrix liquid crystal display element using this liquid crystal composition and having a wide operating temperature range.

  As a result of intensive studies to solve the above problems, the present invention, as a first component, general formula (1) and general formula (2),

(式中、R¹及びR²はそれぞれ独立して、炭素数1〜15のアルキル基又は炭素数2〜15のアルケニル基であり、この基は非置換であるか、あるいは置換基として少なくとも1個のハロゲン基を有しており、そしてこれらの基中に存在する1個又は2個以上のCH₂基はそれぞれ独立してO原子が相互に直接結合しないものとして-O-、-S-、-CO-、-COO-、-OCO-又は-OCO-O-により置き換えられても良く、
A¹及びA²はそれぞれ独立して、
(a) トランス-1,4-シクロへキシレン基(この基中に存在する1個のCH₂基又は隣接していない2個以上のCH₂基は -O- 及び又は -S- に置き換えられてもよい)
(b) 1,4-フェニレン基(この基中に存在する1個のCH₂基又は隣接していない2個以上のCH₂基は -N- に置き換えられてもよい)
からなる群より選ばれる基であり、上記の基(a)又は基(b)はハロゲンで置換されていても良く、
Z¹及びZ²はそれぞれ独立して、単結合、-CH₂CH₂-、-(CH₂)₄-、-OCH₂-、-CH₂O-、-COO-、-OCO-、-OCF₂-、-CF₂O-又は-C≡C-を表し、
l及びmはそれぞれ独立して0又は1であり、X¹〜X⁴はそれぞれ独立してH、F又はClであり、Q¹及びQ²はそれぞれ独立して-OCH₂-、-OCF₂-、-OCHF-、-CF₂-又は単結合であり、Y¹〜Y⁶はそれぞれ独立してF又はClである。) で表される化合物群から選ばれる化合物を1種又は2種以上を13〜65質量%含有し、第二成分として一般式(3)及び一般式(4)

Wherein R ¹ and R ² are each independently an alkyl group having 1 to 15 carbon atoms or an alkenyl group having 2 to 15 carbon atoms, and this group is unsubstituted or has at least 1 substituent. Each having one halogen group and one or more CH ₂ groups present in these groups are each independently -O-, -S- , -CO-, -COO-, -OCO- or -OCO-O-
A ¹ and A ² are each independently
(a) trans-1,4-cyclohexylene group (one CH ₂ group present in this group or two or more non-adjacent CH ₂ groups are replaced by -O- and / or -S- (May be)
(b) 1,4-phenylene group (one CH ₂ group present in this group or two or more non-adjacent CH ₂ groups may be replaced by -N-)
A group selected from the group consisting of: the group (a) or the group (b) may be substituted with halogen,
Z ¹ and Z ² 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- or -C≡C-
l and m are each independently 0 or 1, X ^{1 to} X ⁴ are each independently H, F or Cl, and Q ¹ and Q ² are each independently —OCH ₂ —, —OCF ₂ —, —OCHF—, —CF ₂ — or a single bond, and Y ^{1 to} Y ⁶ are each independently F or Cl. ) Containing 13 to 65% by mass of one or more compounds selected from the group of compounds represented by general formula (3) and general formula (4) as the second component

(式中、R³〜R⁵はそれぞれ独立的にR¹と同じ意味を表し、
B¹〜B⁵はそれぞれ独立的に
(a) トランス-1,4-シクロへキシレン基(この基中に存在する1個のCH₂基又は隣接していない2個以上のCH₂基は -O- 及び又は -S- に置き換えられてもよい。)
(b) 1,4-フェニレン基(この基中に存在する1個のCH₂基又は隣接していない2個以上のCH₂基は -N- に置き換えられてもよい。)
からなる群より選ばれる基であり、上記の基(a)又は基(b)はCH₃又はハロゲンで置換されていても良く、

(Wherein R ^{3 to} R ⁵ each independently represent the same meaning as R ¹ ,
B ^{1 to} B ⁵ are each independently
(a) trans-1,4-cyclohexylene group (one CH ₂ group present in this group or two or more non-adjacent CH ₂ groups are replaced by -O- and / or -S- May be.)
(b) 1,4-phenylene group (one CH ₂ group present in this group or two or more non-adjacent CH ₂ groups may be replaced by —N—)
A group selected from the group consisting of the above group (a) or group (b) may be substituted with CH ₃ or halogen,

n and o are each independently 0, 1 or 2,
L ¹ ~L ⁴ is each independently a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -, - OCH 2 -, - CH 2 O -, - COO -, - OCO -, - OCF _2- , -CF ₂ O- or -C≡C-
At least one of L ¹ and L ² is —C≡C—;
At least one of L ³ and L ⁴ is -C≡C-;
When a plurality of B ¹ and L ¹ are present, they may be the same or different,
When a plurality of B ⁴ and L ³ are present, they may be the same or different,
X ⁵ and X ⁶ are each independently H, F or Cl, Q ³ is —OCH ₂ —, —OCF ₂ —, —OCHF—, —CF ₂ — or a single bond, and Y ⁷ is F Or Cl. ) Containing 12 to 60% by mass of one or two or more compounds selected from the compound group represented by the following formula: the content of the first component is A mass%, and the content of the second component is B mass%. In such a case, a liquid crystal composition for an active matrix liquid crystal display element characterized by satisfying the formula 800 <A × B <1400 and a liquid crystal display element using the composition are provided.

  By the combination of the liquid crystal compounds of the present invention, a liquid crystal composition for an active matrix liquid crystal display device having a stable nematic phase at a low temperature and a high dielectric anisotropy while maintaining a high refractive index anisotropy can be obtained. It was. By using this composition, an active matrix liquid crystal display element having a wide operating temperature range is provided, which is very practical as a liquid crystal display for a liquid crystal projector or OCB mode.

  In the liquid crystal composition of the present invention, the first component contains one or more compounds from the compound group represented by the general formula (1) and the general formula (2), preferably 2 to 15 types, 2 Species to 10 species are more preferred, and 2 to 7 species are more preferred.

The content of one or more compounds selected from the compound group represented by the general formula (1) and the general formula (2) as the first component is in the range of 13 to 65% by mass, A range of 60% by mass is more preferable. R ¹ and R ² are preferably an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, an unsubstituted linear alkyl group having 1 to 8 carbon atoms or an alkyl group having 2 to 8 carbon atoms. An alkenyl group is more preferable, and structures represented by the following formulas (a) to (e) are more preferable.

(構造式は右端で環に連結しているものとする。)

(The structural formula shall be connected to the ring at the right end.)

A ¹ and A ² are each independently a trans-1,4-cyclohexylene group, 1,4-phenylene group, 3-fluoro-1,4-phenylene group or 3,5-difluoro-1,4- A phenylene group is preferable, and a 1,4-phenylene group or a trans-1,4-cyclohexylene group is more preferable. Z ¹ and Z ² 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- or -C≡C-, but -COO-, -OCO-, -CH ₂ CH _2- , -C≡C-,-(CH ₂ ) ₄ -or a single bond Preferably, —CH ₂ CH ₂ —, —C≡C— or a single bond is more preferable, and —CH ₂ CH ₂ — or a single bond is particularly preferable. X ^{1 to} X ⁴ are each independently —H, —F or —Cl, preferably —H or —F. Q ¹ and Q ² are each independently preferably —OCF ₂ —, —CF ₂ —, or a single bond, and more preferably a single bond. Y ^{1 to} Y ⁶ are each independently F or Cl, with F being preferred.

More specifically, the general formula (1) or the general formula (2) is preferably a compound represented by the following general formula as a specific structure.

(In the formula, R ¹ and R ² are each independently an alkyl group having 1 to 15 carbon atoms or an alkenyl group having 2 to 15 carbon atoms.)
As the second component, it contains one or more from the compound group represented by the general formula (3) and general formula (4), preferably 2 to 15 types, more preferably 2 to 10 types 2 to 7 types are more preferable. The content of one or more compounds selected from the group of compounds represented by the general formula (3) and the general formula (4) is in the range of 12 to 60% by mass, but 15 to 60% by mass. A range is more preferable. R ^{3 to} R ⁵ are each independently preferably an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and an unsubstituted linear alkyl group having 1 to 8 carbon atoms or carbon atoms. A alkenyl group having 2 to 8 is more preferable, and a structure represented by the following formulas (a) to (e) is more preferable.

(構造式は右端で環に連結しているものとする。)

(The structural formula shall be connected to the ring at the right end.)

B ^{1 to} B ⁵ are each independently trans-1,4-cyclohexylene group, 1,4-phenylene group, 2-methyl-1,4-phenylene group, 3-fluoro-1,4-phenylene group Or a 3,5-difluoro-1,4-phenylene group is preferred.
L ¹ ~L ⁴ 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- or -C≡C-, but -COO-, -OCO-, -CH ₂ CH _2- , -C≡C-,-(CH ₂ ) ₄ -or a single bond -COO-, -OCO-, -C≡C- or a single bond is more preferable, and -C≡C- or a single bond is particularly preferable. X ⁵ and X ⁶ are each independently —H, —F or —Cl, preferably —H or —F. Q ³ is preferably —OCF ₂ —, —CF ₂ — or a single bond, and more preferably a single bond. Y ⁷ is F or Cl, with F being preferred.

  More specifically, as a specific structure of the general formula (3), the following general formula (3a)

(Wherein R ³ , R ⁴ , B ¹ , L ¹ and n represent the same meaning as in general formula (3), X ¹² and X ¹³ are each independently H, F or Cl; W ¹ Is H or CH ₃ ), and the following compounds are particularly preferable.

(In the formula, R ³ and R ⁴ are each independently an alkyl group having 1 to 15 carbon atoms, an alkoxyl group having 1 to 15 carbon atoms, or an alkenyl group having 2 to 15 carbon atoms.)
Formula (4) Specific following general formula as a structure (4a)

(式中R⁵、B⁴、L³、X⁶、及びoは一般式(4)におけると同じ意味を表す。) で表される化合物が好ましく、次の化合物が特に好ましい。

(Wherein R ⁵ , B ⁴ , L ³ , X ⁶ , and o have the same meaning as in formula (4)) are preferred, and the following compounds are particularly preferred.

(Wherein R ⁵ is an alkyl group having 1 to 15 carbon atoms or an alkenyl group having 2 to 15 carbon atoms.)
In the liquid crystal composition of the present invention, the content of the compound group represented by the general formula (1) and the general formula (2) is in the range of 13 to 65% by mass, and the general formula (3) and the general formula (4) When the content of the compound group represented by the formula is in the range of 12 to 60 mass%, the content of the first component is A mass%, and the content of the second component is B mass%, the formula 800 <A × B <1400 is satisfied. This formula quantifies the optimum range of the content ratio of the compound group represented by the general formula (3) and the general formula (4) and the compound group represented by the general formula (3) and the general formula (4). This situation is shown in FIG.
In the present invention, the content of the compound group represented by the general formula (1) and the general formula (2) is in the range of 15 to 65% by mass, and is represented by the general formula (3) and the general formula (4). The content of the compound group is preferably in the range of 15 to 60% by mass.
Selected from the compound group represented by the general formula (1) and the general formula (2) of the first component and from the compound group represented by the general formula (3) and the general formula (4) of the second component General formula (5), general formula (6) and general formula (7) as the third component in order to further improve the compatibility with the compound and achieve a more stable nematic phase at low temperature

(Wherein R ^{6 to} R ⁸ are each independently the same as the definition of R ¹ in the general formula (1),
C ^{1 to} C ³ are each independently
(a) trans-1,4-cyclohexylene group (one CH ₂ group present in this group or two or more non-adjacent CH ₂ groups are replaced by -O- and / or -S- (May be)
(b) 1,4-phenylene group (one CH ₂ group present in this group or two or more non-adjacent CH ₂ groups may be replaced by -N-)
Wherein the groups (a) and (b) may be substituted with halogen, and K ^{1 to} K ⁴ 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- or represents -C≡C-,
p and q are each independently 0 or 1, r is 0, 1 or 2, X ^{8 to} X ¹¹ are each independently H, F or Cl, and Q ^{4 to} Q ⁶ are Each independently represents —OCH ₂ —, —OCF ₂ —, —OCHF—, —CF ₂ — or a single bond, and Y ^{8 to} Y ¹³ each independently represent F or Cl. It is preferable to contain one or more compounds selected from the compounds represented by

  As the third component, it is preferable to contain 2 to 10 compound groups represented by general formula (5), general formula (6) and general formula (7), more preferably 2 to 7 types, and 2 types ~ 5 types are more preferred.

The content of one or more compounds selected from the compound group represented by general formula (5), general formula (6) and general formula (7) as the third component is in the range of 5 to 40% by mass. It is preferable that it is in the range of 5 to 35% by mass. R ^{6 to} R ⁸ are each independently preferably an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, an unsubstituted linear alkyl group having 1 to 8 carbon atoms or a carbon number. A alkenyl group having 2 to 8 is more preferable, and a structure represented by the formula (a) to the formula (e) is more preferable for the alkenyl group.

C ^{1 to} C ³ are each independently a trans-1,4-cyclohexylene group, 1,4-phenylene group, 3-fluoro-1,4-phenylene group or 3,5-difluoro-1,4- A phenylene group is preferable, and a 1,4-phenylene group or a trans-1,4-cyclohexylene group is more preferable. K ^{1 to} K ⁴ 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- or -C≡C-, but -COO-, -OCO-, -CH ₂ CH _2- , -C≡C-,-(CH ₂ ) ₄ -or a single bond Preferably, —CH ₂ CH ₂ —, —C≡C— or a single bond is more preferable, and —CH ₂ CH ₂ — or a single bond is particularly preferable. r is 0, 1 or 2, with 1 or 2 being preferred. X ^{8 to} X ¹¹ are each independently —H, —F or —Cl, preferably —H or —F. Q ^{4 to} Q ⁶ are each independently preferably —OCF ₂ —, —CF ₂ — or a single bond, and more preferably a single bond. Y ^{8 to} Y ¹³ are each independently F or Cl, with F being preferred.

More specifically, the general formula (5), the general formula (6) or the general formula (7) is preferably a compound represented by the following general formula as a specific structure.

(Wherein R ^{6 to} R ⁸ are each independently an alkyl group having 1 to 15 carbon atoms or an alkenyl group having 2 to 15 carbon atoms.)

In the present invention, the nematic phase-isotropic liquid phase transition temperature (T _NI ) is more preferably 70 ° C. or higher, and further preferably 80 ° C. or higher. The solid phase or smectic phase-nematic phase transition temperature (T _{→ N} ) is preferably −20 ° C. or lower, and more preferably −30 ° C. or lower. The dielectric anisotropy (Δε) at 25 ° C. is more preferably 7.0 to 18.0, and further preferably 7.0 to 13.0. The refractive index anisotropy (Δn) at 25 ° C. is more preferably 0.185 to 0.30, and further preferably 0.185 to 0.25.

  The nematic liquid crystal composition is useful for a liquid crystal display device, particularly useful for a liquid crystal display device for driving an active matrix, and can be used for a liquid crystal display device for OCB mode, IPS mode, or ECB mode.

  The nematic liquid crystal composition of the present invention may contain a normal nematic liquid crystal, a smectic liquid crystal, a cholesteric liquid crystal and the like in addition to the above compounds.

  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. Further, “%” in the compositions of the following Examples and Comparative Examples means “mass%”.

T _NI : Nematic phase-isotropic liquid phase transition temperature (° C) is the liquid crystal phase upper limit temperature
T _{→ N} : Solid phase or smectic phase-nematic phase transition temperature (° C.) as liquid crystal phase lower limit temperature Δε: Dielectric anisotropy Δn: Refractive index anisotropy The following abbreviations are used in the compound description.
Terminal n (number) C _n H _{2n + 1-}
T -C≡C-
2 -CH ₂ CH _2-
On -OC _n H _{2n + 1}
F -F
ndm- C _n H _{2n + 1} -C = C- (CH ₂ ) _m-1-
-O (dm) n -O (CH2) m-2-C = C-CnH2n + 1

(Examples 1 to 3) Preparation of liquid crystal composition Nematic liquid crystal compositions (No. 1), (No. 2) and (No. 3) shown below were prepared, and their physical property values were measured. Shown in 1.

The nematic liquid crystal compositions (No. 1), (No. 2) and (No. 3) of Examples 1 to 3 are characterized by nematic phase-isotropic liquid phase transition temperature (T _NI ), solid phase or smectic phase. -Nematic phase transition temperature (T _{→ N} ), dielectric anisotropy (Δε), refractive index anisotropy (Δn) showed desired values.

(Comparative Examples 1 to 3) Adjustment of liquid crystal composition As a comparative example, nematic liquid crystal compositions (R1), (R2) and (R3) shown below were adjusted and their physical properties were measured. The results are shown in Table 2. .

In the nematic liquid crystal compositions (R1) and (R2) of Comparative Examples 1 to 3, the solid phase-nematic phase transition temperature (T 1 _{→ N 2} ) was high, and crystals were precipitated at room temperature. Also in the nematic liquid crystal composition (R3) , the nematic phase-isotropic liquid phase transition temperature (T _NI ), dielectric anisotropy (Δε), and refractive index anisotropy (Δn) are all desired. Although the value was satisfied, the smectic phase-nematic phase transition temperature (T 1 _{→ N 2} ) was too high at −6 ° C., and it was a practically problematic composition.

(Examples 4 to 6) Adjustment of liquid crystal composition Nematic liquid crystal compositions (No. 4), (No. 5) and (No. 6) shown below were prepared and their physical properties were measured. Shown in 3.

実施例4〜6のネマチック液晶組成物(No.4)、(No.5)及び(No.6)特性は、ネマチック相-等方性液体相転移温度（T_N-I）、固体相又はスメクチック相−ネマチック相転移温度（T_→N）、誘電率異方性（Δε）、屈折率異方性（Δｎ）全ての特性において所望の値を示した。

The nematic liquid crystal compositions (No. 4), (No. 5) and (No. 6) of Examples 4 to 6 are characterized by nematic phase-isotropic liquid phase transition temperature (T _NI ), solid phase or smectic phase. -Nematic phase transition temperature (T _{→ N} ), dielectric anisotropy (Δε), refractive index anisotropy (Δn) showed desired values.

(Comparative Examples 4 and 5) Adjustment of liquid crystal composition As comparative examples, nematic liquid crystal compositions (R4) and (R5) shown below were prepared and their physical properties were measured, and the results are shown in Table 4.

The properties of the nematic liquid crystal compositions (R4) and (R5) in Comparative Examples 4 and 5 are as follows: nematic phase-isotropic liquid phase transition temperature (T _NI ), smectic phase-nematic phase transition temperature (T _{→ N} ), refractive index In the anisotropy (Δn) characteristic, a desired value was satisfied, but the dielectric anisotropy (Δε) was small and the desired value was not satisfied.

(Examples 7 to 9) Adjustment of liquid crystal composition Nematic liquid crystal compositions (No. 7), (No. 8) and (No. 9) shown below were prepared and their physical properties were measured. Shown in 5.

The nematic liquid crystal compositions (No. 7), (No. 8) and (No. 9) of Examples 7 to 9 have the following characteristics: nematic phase-isotropic liquid phase transition temperature (T _NI ), solid phase or smectic phase -Nematic phase transition temperature (T _{→ N} ), dielectric anisotropy (Δε), refractive index anisotropy (Δn) showed desired values.

(Comparative Examples 6 and 7) Adjustment of liquid crystal composition As comparative examples, nematic liquid crystal compositions (R6) and (R7) shown below were prepared and their physical properties were measured, and the results are shown in Table 6.

The properties of the nematic liquid crystal compositions (R6) and (R7) in Comparative Examples 6 and 7 are as follows: nematic phase-isotropic liquid phase transition temperature (T _NI ), smectic phase-nematic phase transition temperature (T _{→ N} ), dielectric constant In the anisotropy (Δε) characteristic, a desired value was satisfied, but the refractive index anisotropy (Δn) was low and the desired value was not satisfied.

The graph which plotted 1st component content (%) and 2nd component content (%) of the liquid crystal composition of Examples 1-9 and Comparative Examples 1-7.

Claims (7)

General formula (1) as the first component,

(Wherein R ¹ is an alkyl group having 1 to 15 carbon atoms or an alkenyl group having 2 to 15 carbon atoms, and this group is unsubstituted or has at least one halogen group as a substituent. And one or more of the CH ₂ groups present in these groups are each independently -O-, -S-, -CO-, -COO as O atoms are not directly bonded to each other. -, -OCO- or -OCO-O- may be substituted,
A ¹ is
(a) trans-1,4-cyclohexylene group (one CH ₂ group present in this group or two or more non-adjacent CH ₂ groups are replaced by -O- and / or -S- (May be)
(b) 1,4-phenylene group (one CH ₂ group present in this group or two or more non-adjacent CH ₂ groups may be replaced by -N-)
A group selected from the group consisting of: the group (a) or the group (b) may be substituted with halogen,
Z ¹ is a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -, - OCH 2 -, - CH 2 O -, - COO -, - OCO -, - OCF 2 -, - CF 2 O -Or-C≡C-
l is 0 or 1, X ¹ and X ² are each independently H, F or Cl, and Q ¹ is —OCH ₂ —, —OCF ₂ —, —OCHF—, —CF ₂ — or a single bond And Y ^{1 to} Y ³ are each independently F or Cl. ) Containing 13 to 65% by mass of one or more compounds selected from the group of compounds represented by general formula (3) and general formula (4) as the second component

(Wherein R ^{3 to} R ⁵ each independently represent the same meaning as R ¹ ,
B ^{1 to} B ⁵ are each independently
(a) trans-1,4-cyclohexylene group (one CH ₂ group present in this group or two or more non-adjacent CH ₂ groups are replaced by -O- and / or -S- May be.)
(b) 1,4-phenylene group (one CH ₂ group present in this group or two or more non-adjacent CH ₂ groups may be replaced by —N—)
A group selected from the group consisting of the above group (a) or group (b) may be substituted with CH ₃ or halogen,
n and o are each independently 0, 1 or 2,
L ¹ ~L ⁴ is each independently a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -, - OCH 2 -, - CH 2 O -, - COO -, - OCO -, - OCF _2- , -CF ₂ O- or -C≡C-
At least one of L ¹ and L ² is —C≡C—;
At least one of L ³ and L ⁴ is -C≡C-;
When a plurality of B ¹ and L ¹ are present, they may be the same or different,
When a plurality of B ⁴ and L ³ are present, they may be the same or different,
X ⁵ and X ⁶ are each independently H, F or Cl, Q ³ is —OCH ₂ —, —OCF ₂ —, —OCHF—, —CF ₂ — or a single bond, and Y ⁷ is F Or Cl. ) Containing 12 to 60% by mass of one or two or more compounds selected from the compound group represented by the following formula: the content of the first component is A mass%, and the content of the second component is B mass%. A liquid crystal composition for an active matrix liquid crystal display element excluding a polymer dispersion type liquid crystal display element characterized by satisfying the formula 800 <A × B <1400. Nematic-isotropic transition temperature is 70 ° C to 120 ° C, crystal or smectic-nematic transition temperature is -80 ° C to -20 ° C, refractive index anisotropy Δn is 0.185 to 0.30, dielectric constant anisotropic The liquid crystal composition according to claim 1, wherein the property Δε is 7.0 to 18.0. As the third component, general formula (5), general formula (6) or general formula (7)

(Wherein R ^{6 to} R ⁸ are each independently the same as the definition of R ¹ in the general formula (1),
C ^{1 to} C ³ are each independently
(a) trans-1,4-cyclohexylene group (one CH ₂ group present in this group or two or more non-adjacent CH ₂ groups are replaced by -O- and / or -S- (May be)
(b) 1,4-phenylene group (one CH ₂ group present in this group or two or more non-adjacent CH ₂ groups may be replaced by -N-)
The group (a) or the group (b) may be substituted with a halogen, and K ^{1 to} K ⁴ 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- or represents -C≡C-,
p and q are each independently 0 or 1, r is 0, 1 or 2, X ^{8 to} X ¹¹ are each independently H, F or Cl, and Q ^{4 to} Q ⁶ are each independently And —OCH ₂ —, —OCF ₂ —, —OCHF—, —CF ₂ —, or a single bond, and Y ^{8 to} Y ¹³ are each independently F or Cl. 3. The liquid crystal composition according to claim 1, comprising 5 to 40% by mass of one or more compounds selected from the compounds represented by formula (1). General formula (3) is general formula (3a)

(Wherein R ³ , R ⁴ , B ¹ , L ¹ , and n represent the same meaning as in general formula (3), X ¹² and X ¹³ are each independently H, F, or Cl, and W ¹ 2. The liquid crystal composition according to claim 1, wherein H is CH or CH ₃ . General formula (4) is general formula (4a)

2. The liquid crystal composition according to claim 1, wherein R ⁵ , B ⁴ , L ³ , X ⁶ and o have the same meaning as in general formula (4). A liquid crystal display element using the liquid crystal composition according to claim 1. An active matrix liquid crystal display device using the liquid crystal composition according to claim 1.

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