JP2002069449A - Liquid crystal composition and liquid crystal display element using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low viscous liquid crystal composition stable to heat and light and having a wide range of liquid crystal temperature and a negative Δεwith a large absolute value. SOLUTION: This liquid crystal composition includes compound having structures represented by formulas (1-1), (1-2), and (1-3) in the molecule and having a negative Δε. The liquid crystal composition contains as an additional component compounds represented by general formulas (III) and (IV). Accordingly, an excellent liquid crystal composition which possesses negative dielectric anisotropy with a large absolute value, suitable refractive index anisotropy, relatively low viscosity, high compatibility, and excellent chemical and physical stability is obtained. In addition, an excellent liquid crystal display element using this composition is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal composition having various properties optimal for a liquid crystal display device and a liquid crystal display device using the same.

[0002]

2. Description of the Related Art In a TN type liquid crystal display device or an STN type liquid crystal display device, liquid crystal molecules which are oriented in a direction parallel and twisted to a substrate by applying a voltage are controlled vertically by controlling the brightness of the light by eliminating the twisting. Display. As described above, when the liquid crystal molecules rise from the initial twisted state, the twisted state differs depending on the viewing angle of the observer, so that the contrast is reduced and the color is inverted, so that the effective viewing angle is narrow. As a method of obtaining a wide viewing angle, an IPS (in-plane switching) method, a VA method, and an ECB method have been proposed. In such a method, a material having a negative Δε is used unlike a conventionally used material having a positive relative dielectric constant Δε. In order to improve the display characteristics, it is required that the liquid crystal material has a large negative Δε. However, when a substituent having a strong polarity is added in the lateral direction of the liquid crystal molecules in order to increase Δε negatively, the viscosity often increases and the maximum nematic temperature often decreases. In other words, it is chemically stable against heat and light, has a wide liquid crystal temperature range, and has a large absolute value of a negative Δ
A low-viscosity liquid crystal composition having ε has not been provided so far.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal composition which does not have the above-mentioned disadvantages or has only a little, and at the same time, has a very high resistance value and a high voltage holding ratio. An object of the present invention is to provide a liquid crystal display device using the composition.

[0004]

The present invention, in order to solve the above-mentioned problems, includes a compound having a structure of the general formula (I-1), (I-2) or (I-3) in a molecule. The composition, a liquid crystal composition containing a compound of the general formula (III), (IV) as an additional component,
Having a large negative dielectric anisotropy, suitable refractive index anisotropy, relatively low viscosity, high compatibility, that a liquid crystal composition excellent in chemical and physical stability can be obtained, and It has been found that an excellent liquid crystal display device using the composition can be obtained, and the present invention has been achieved.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The first invention comprises a compound represented by the general formula (I-
The present invention relates to a liquid crystal composition comprising at least one compound having at least one of the structures of 1) to (I-3).

Embedded image (In the formula, X ¹ to X ⁶ each independently represent a hydrogen atom, a halogen atom, a cyano group, an isocyano group, but at least one of X ¹ to X ³ , X ⁴ , at least one of X ⁵ , and X ⁶ is not a hydrogen atom.)

Here, a compound selected from negative dielectric anisotropy compounds having the structures of general formulas (I-1), (I-2) and (I-3) is used.
Contains one or two or more, preferably contains two or three, especially containing two or more (I-1),
It is preferable to contain two or more (I-1) and one or more (I-2). The content is preferably 5 to 90% by mass when low voltage driving or a high nematic upper temperature limit is required, and 10 to 50% by mass in order to obtain a preferable balance of driving voltage and response speed.
Mass% is more preferable, and 10 to 30 when a high-speed response is desired.
% By mass, and the structures of formulas (I-1), (I-2) and (I-3) are preferably the following structures.

Embedded image

The second invention relates to the liquid crystal composition of Invention 1 having a negative dielectric anisotropy, wherein the dielectric anisotropy Δε is smaller than −1. Here, Δε is preferably smaller than −1.5, and more preferably smaller than −2.

[0008] The third invention relates to the liquid crystal composition of invention 1 or 2, which comprises at least one compound of the general formula (II).

Embedded image (Wherein, R ¹ and Y ¹ each independently represent an alkyl group having 1 to 16 carbon atoms, an alkyloxy group, an alkyloxyalkyl group, an alkenyl group having 2 to 16 carbon atoms, or an alkenyloxy group having 3 to 16 carbon atoms. Group, hydrogen atom, halogen atom, cyano group, isocyano group or formula (II-a)

Embedded image (In the formula, R ² represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 15 carbon atoms or an alkenyl group having 2 to 15 carbon atoms, Q represents a hydrogen atom or a halogen atom, and n is an integer of 0 to 10. And the methylene group in-(CH ₂ ) _n- may be substituted with an oxygen atom provided that the oxygen atoms are not bonded to each other.), And the methylene group in the alkyl group is an oxygen atom , A sulfur atom, a nitrogen atom, -C≡C-
One or more hydrogen atoms in these alkyl groups may be substituted with a fluorine atom or a chlorine atom, and Z ¹ , Z ² , Z ³ and Z ⁴ each independently represent a single bond,-(CH ₂ ) _2- , -CH = CH-, -C≡C
-, - COO -, - OCO -, - CH 2 O -, - OCH 2 -, - (CH 2) 4 -, - (CH 2) 3
O-, -O (CH ₂ ) _3- , -CH = CHCH ₂ CH _2- , -CH ₂ CH = CHCH _2- , -CH ₂ C
H ₂ CH = CH-, -CH = CHCH = CH-, -CF ₂ O-, -OCF _2- , -CH = CHCH ₂ O
-, -OCH ₂ CH = CH-, -CF = CF-, -CH ₂ CF _2- , -CF ₂ CH ₂ -,-(C
F ₂ ) ₂ -,-(CF ₂ ) ₄ -,-(CH ₂ ) ₂ COO-, -OCO (CH ₂ ) _2- , -CH = CHC
OO-, -OCOCH = CH-, -CH = CHC≡C-, or -C≡CCH = CH-, wherein ring A ¹ , ring A ² , ring A ³ and ring A ⁴ are each independently trans
-1,4-cyclohexylene group, 1,4-cyclohexenylene group, trans-1,4-silacyclohexylene group, 1,4-phenylene group, 2,3-difluoro-1,4-phenylene group, 2 -Fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, bicyclo [1.1.1] pentane-1,3-diyl, tetrahydropyran-2,5-diyl, pyrimidine-2,5- Diyl group, pyridine-2,5-diyl group, 1,3-dioxane-2,5-diyl group, 1,
3-dithiane-2,5-diyl group, tetrahydrothiopyran-2,
5-diyl group, naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group or general formula (I-1) , (I-2), (I-3)

Embedded image In the ring represented by, ring A ¹ , ring A ² , at least one of the ring A ³ and the ring A ⁴ is a general formula (I-1), (I-2), A ring represented by any one of r ¹ , r ² , r ³ , and r ⁴ are each independently 0
Or 1 but r ¹ + r ² + r ³ + r ⁴ ≧ 2. )

R ¹ is an alkyl group having ^{1 to} 16 carbon atoms, an alkyloxy group, an alkyloxyalkyl group, a C ² to C 16
An alkenyl group, an alkenyloxy group having 3 to 16 carbon atoms, preferably a formula (II-1), an alkyl group having 1 to 16 carbon atoms,
An alkyloxy group is particularly preferred, and Y ¹ is an alkyl group having ¹ to 16 carbon atoms, an alkyloxy group, an alkyloxyalkyl group, an alkenyl group having 2 to 16 carbon atoms, an alkenyloxy group having 3 to 16 carbon atoms, and a halogen atom. , A cyano group, an isocyano group is preferable, and an alkenyl group has a structure of the following formulas (a) to (e),

Embedded image (The structural formula is connected to the ring at the right end.) Among them, (b), (c) and (d) are particularly preferable. R ² is preferably a hydrogen atom, a halogen atom, or an alkyl group having 1 to 15 carbon atoms, particularly preferably a halogen atom (especially F). Q is a halogen atom
(Especially F) is preferred, and n is preferably 0 or 2. Z ¹ , Z ² ,
Z ³ and Z ⁴ are a single bond,-(CH ₂ ) _2- , -CH = CH-, -C≡C-, -CO
O— is preferred, and a single bond, — (CH ₂ ) ₂ —, is particularly preferred.

Ring A ¹ , ring A ² , ring A ³ and ring A ⁴ have the general formula (I-
Structures other than 1), (I-2) and (I-3) include trans-1,4-
Cyclohexylene group, 1,4-phenylene group, 2,3-difluoro-1,4-phenylene group, 2-fluoro-1,4-phenylene group,
3-fluoro-1,4-phenylene group, naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group,
A decahydronaphthalene-2,6-diyl group is preferred, especially a 2,3-difluoro-1,4-phenylene group, 2-fluoro-1,4-
It is preferable that at least one phenylene group or 3-fluoro-1,4-phenylene group is contained. (I-1), (I-2), (I-3)
Preferred are (I-1a to g), (I-2a to c), and (I-3a).
r ¹ , r ² , r ³ , and r ⁴ are preferably r ¹ + r ² + r ³ + r ⁴ = 2 or 3. The compound of the general formula (II) contains one or more kinds,
It is preferable to contain three or three species, the content of which is 5 to
90 mass% is preferable, 10 to 50 mass% is more preferable, and 10 to 50 mass%.
30% by mass is particularly preferred.

A fourth aspect of the present invention is a compound of the general formula (III) or (IV) as an additional second component.

Embedded image (Wherein, R ³ , R ⁴ , and R ⁵ are each independently an alkyl or alkoxyl group having 1 to 16 carbon atoms, which may be substituted with fluorine, an alkenyl group having 2 to 16 carbon atoms, 3 to 16 alkenyloxy groups, or 1 to 1 carbon atoms
Represents an alkyl group having 1 to 12 carbon atoms substituted with 10 alkoxyl groups, and each of ring B, ring C, ring D, ring E and ring F may be independently substituted with a fluorine atom, Four-
Phenylene group, 2-methyl-1,4-phenylene group, 3-methyl-
1,4-phenylene group, naphthalene-2,6-diyl group, phenanthrene-2,7-diyl group, fluorene-2,7-diyl group, trans-1,4-cyclohexylene group, 1,2,3, 4-tetrahydronaphthalene-2,6-diyl group, decahydronaphthalene-2,
6-diyl group, trans-1,3-dioxane-2,5-diyl group,
A pyridine-2,5-diyl group, a pyrimidine-2,5-diyl group, a pyrazine-2,5-diyl group or a pyridazine-2,5-diyl group, l and m are each independently 0, 1 or 2 for Z
⁵ , Z ⁶ , Z ⁷ and Z ⁸ are each independently a single bond, -CH = CH-, -C
OO -, - OCO -, - CH 2 CH 2 -, - (CH 2) 4 -, - OCH 2 -, - CH 2 O- or -
Represents C≡C-, X ⁸ is a cyano group, a fluorine atom, a chlorine atom,
Represents a trifluoromethoxy group, a trifluoromethyl group, a difluoromethoxy group, a hydrogen atom, a 3,3,3-trifluoroethoxy group, R 'or -OR', and R 'is a straight-chain having 1 to 12 carbon atoms. alkyl group or represents a 2-12 linear alkenyl group, X ^7, X ⁹ represents a hydrogen atom, a fluorine atom or a chlorine atom. The present invention relates to a liquid crystal composition according to invention 1, 2 or 3, which comprises one or more compounds selected from the group consisting of:

As additional second components, the general formulas (III) and (IV)
Containing one or more compounds selected from, preferably 3 or more, more preferably 3 to 20,
5 to 15 are particularly preferred, and it is more preferred that at least two or more of the compounds of the general formula (III) are contained therein. The content is preferably 5 to 95% by mass, more preferably 15 to 85% by mass, and particularly preferably 25 to 85% by mass. R ³ , R ⁴ , R ⁵ are
An alkyl group having 1 to 16 carbon atoms, an alkenyl group having 2 to 16 carbon atoms is preferable, an alkyl group having 1 to 8 carbon atoms, and an alkenyl group having 2 to 8 carbon atoms is more preferable, and an alkyl having 1 to 5 carbon atoms. Formulas (a) to (e) are particularly preferred as groups or alkenyl groups. Ring B, ring C, ring D, ring E and ring F may each be independently substituted with a fluorine atom 1,4-phenylene group, naphthalene-2,6-diyl group, phenanthrene-2,
7-diyl group, fluorene-2,7-diyl group, trans-1,4-
Cyclohexylene group, 1,2,3,4-tetrahydronaphthalene
-2,6-diyl group, decahydronaphthalene-2,6-diyl group is preferred, 2,3-difluoro-1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1 The 4,4-phenylene group is particularly preferred. l and m are each independently 0, 1 or
Represents 2, preferably 0 or 1. ^{Z 5, Z 6, Z 7} , Z
⁸ is preferably a single bond, —CH ₂ CH ₂ — or —C≡C—, and more preferably a single bond. X ⁸ represents a cyano group, a fluorine atom, a chlorine atom, a trifluoromethoxy group, a trifluoromethyl group, a difluoromethoxy group, a hydrogen atom, a 3,3,3-trifluoroethoxy group, R 'or -OR', 'Is the number of carbon atoms
Represents a linear alkyl group of 1 to 12, or a linear alkenyl group of 2 to 12, preferably a cyano group, a fluorine atom, a trifluoromethoxy group, a difluoromethoxy group, a fluorine atom, a trifluoromethoxy group, a difluoro A methoxy group is more preferred, and a fluorine atom is particularly preferred. X ⁷ and X ⁹ are preferably a hydrogen atom and a fluorine atom, and particularly preferably a fluorine atom.

Invention 5 is a compound represented by the general formula (III):
B, at least one ring of ring C and ring D is a 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group or 2,3-difluoro-1,4-phenylene group A compound that is
Invention 1, characterized by containing two or more species,
5. The liquid crystal composition according to 2, 3, or 4. It is particularly preferred that at least one of the rings B, C and D is a 2,3-difluoro-1,4-phenylene group. Invention 6 relates to a compound having a structure of the general formula (I-1), (I-2) or (I-3) of at least 2
The present invention relates to the liquid crystal composition according to any one of inventions 1 to 5, characterized by containing at least one kind.

Invention 7 is characterized in that the maximum temperature of the nematic phase is 65 ° C. or more, the minimum temperature of the nematic is -20 ° C. or less, and the anisotropy (Δn) of the refractive index is in the range of 0.05 to 0.24. The invention relates to a liquid crystal composition according to any one of inventions 1 to 6. The maximum temperature of the nematic phase is preferably 75 ° C. or higher, more preferably 85 ° C. or higher. Δn is 0.05
Is preferably from 0.2 to 0.2, and more preferably from 0.06 to 0.15.

Invention 8 relates to the liquid crystal composition according to any one of Inventions 1 to 7, wherein the dielectric anisotropy Δε is smaller than -1.5. The dielectric anisotropy Δε of the liquid crystal composition is
It is preferably smaller than -2.0, more preferably not smaller than -2.5. Invention 9 relates to a liquid crystal display device using the liquid crystal composition according to any one of inventions 1 to 8. Invention 10
The present invention relates to a VA mode or IPS mode liquid crystal display device using the liquid crystal composition according to any one of Inventions 1 to 8.

[0016]

EXAMPLES The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. Further, “%” in the compositions of the following Examples and Comparative Examples means “% by mass”. The characteristics measured in the examples are as follows. _TNI : Nematic phase-isotropic liquid phase transition temperature (° C) T _{→ N} : Solid phase or smectic phase-nematic phase transition temperature (° C) Vth: Threshold voltage in a homeotropically oriented cell having a cell thickness of 5 μm (V) Δε: dielectric anisotropy Δn: birefringence VHR: voltage holding ratio. When a liquid crystal was injected into a 90-degree twisted TN cell with a cell thickness of 6 μm and a 5 V frame time of 20 msec was applied,
The retained voltage Vt and the initial voltage V ₀ after a frame time of 20 msec
(5V) expressed as a percentage. VHR (%) = Vt / V ₀ × 100

(Example 1)

Embedded image Was prepared. T _NI : 81 ℃, Δn: 0.110, Δε: -6.2, Vt
h: 1.39, VHR: 99.7%. As a comparative example,
(I-2c) 2 compounds, (I-1f) 1 compound is similar in structure to (I-1)
Comparative Example 1 was prepared by substituting a compound not included in (I-3).

(Comparative Example 1)

Embedded image As a result of measuring the characteristics of Comparative Example 1, T _{NI was} 44 ° C. and Δn was 0.
094, Δε: -3.9, VHR: 99.3%. It can be seen that Example 1 has a higher T _NI and a negative Δε having a larger absolute value.

(Embodiment 2)

Embedded image Was prepared. T _NI : 88 ° C, Δn: 0.16, Δε: -3.8, VH
R: 99.4%. Has a high nematic maximum temperature, Δ
n is large and has a large negative value ΔΔ.

[0020]

The liquid crystal composition of the present invention has a negative dielectric anisotropy having a large absolute value, and has an appropriate refractive index anisotropy, high compatibility, and excellent chemical and physical stability. A composition was obtained. In addition, an excellent liquid crystal display device using the composition was obtained.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C09K 19/34 C09K 19/34 G02F 1/13 500 G02F 1/13 500 F term (reference) 4H027 BA01 BD01 BD02 BD03 BD04 BD07 BD11 BD24 BE04 BE05 CB02 CB05 CG05 CM05 CN05 CR05 CT05 CW02 DK05

Claims (10)

[Claims] 1. A liquid crystal composition comprising at least one kind of a negative dielectric anisotropic compound having at least one of the structures of the general formulas (I-1) to (I-3) in a molecule. Embedded image (In the formula, X ¹ to X ⁶ each independently represent a hydrogen atom, a halogen atom, a cyano group, an isocyano group, but at least one of X ¹ to X ³ , X ⁴ , at least one of X ⁵ , and X ⁶ is not a hydrogen atom.) 2. The liquid crystal composition according to claim 1, having a dielectric anisotropy Δε smaller than −1. 3. The liquid crystal composition according to claim 1, comprising at least one compound of the general formula (II). Embedded image (Wherein, R ¹ and Y ¹ each independently represent an alkyl group having 1 to 16 carbon atoms, an alkyloxy group, an alkyloxyalkyl group, an alkenyl group having 2 to 16 carbon atoms, or an alkenyloxy group having 3 to 16 carbon atoms. Group, hydrogen atom, halogen atom, cyano group, isocyano group or formula (II-a) (In the formula, R ² represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 15 carbon atoms or an alkenyl group having 2 to 15 carbon atoms, Q represents a hydrogen atom or a halogen atom, and n is an integer of 0 to 10. And the methylene group in-(CH ₂ ) _n- may be substituted with an oxygen atom provided that the oxygen atoms are not bonded to each other.), And the methylene group in the alkyl group is an oxygen atom , A sulfur atom, a nitrogen atom, -C≡C-
One or more hydrogen atoms in these alkyl groups may be substituted with a fluorine atom or a chlorine atom, and Z ¹ , Z ² , Z ³ and Z ⁴ each independently represent a single bond,-(CH ₂ ) _2- , -CH = CH-, -C≡C
-, - COO -, - OCO -, - CH 2 O -, - OCH 2 -, - (CH 2) 4 -, - (CH 2) 3
O-, -O (CH ₂ ) _3- , -CH = CHCH ₂ CH _2- , -CH ₂ CH = CHCH _2- , -CH ₂ C
H ₂ CH = CH-, -CH = CHCH = CH-, -CF ₂ O-, -OCF _2- , -CH = CHCH ₂ O
-, -OCH ₂ CH = CH-, -CF = CF-, -CH ₂ CF _2- , -CF ₂ CH ₂ -,-(C
F ₂ ) ₂ -,-(CF ₂ ) ₄ -,-(CH ₂ ) ₂ COO-, -OCO (CH ₂ ) _2- , -CH = CHC
OO-, -OCOCH = CH-, -CH = CHC≡C-, or -C≡CCH = CH-, wherein ring A ¹ , ring A ² , ring A ³ and ring A ⁴ are each independently trans
-1,4-cyclohexylene group, 1,4-cyclohexenylene group, trans-1,4-silacyclohexylene group, 1,4-phenylene group, 2,3-difluoro-1,4-phenylene group, 2 -Fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, bicyclo [1.1.1] pentane-1,3-diyl, tetrahydropyran-2,5-diyl, pyrimidine-2,5- Diyl group, pyridine-2,5-diyl group, 1,3-dioxane-2,5-diyl group, 1,
3-dithiane-2,5-diyl group, tetrahydrothiopyran-2,
5-diyl group, naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group or general formula (I-1) , (I-2), (I-3) Although in a represented by ring, ring A ^1, ring A ^2, at least one of ring A ³ and ring A ⁴ are the general formula (I-1), (I -2), of (I-3) A ring represented by any of the above, r ¹ , r ² , r ³ , r ⁴
Or 1 but r ¹ + r ² + r ³ + r ⁴ ≧ 2. ) 4. An additional second component having the general formula (III):
(IV) (Wherein, R ³ , R ⁴ , and R ⁵ are each independently an alkyl or alkoxyl group having 1 to 16 carbon atoms, which may be substituted with fluorine, an alkenyl group having 2 to 16 carbon atoms, 3 to 16 alkenyloxy groups, or 1 to 1 carbon atoms
Represents an alkyl group having 1 to 12 carbon atoms substituted with 10 alkoxyl groups, and each of ring B, ring C, ring D, ring E and ring F may be independently substituted with a fluorine atom, Four-
Phenylene group, 2-methyl-1,4-phenylene group, 3-methyl-
1,4-phenylene group, naphthalene-2,6-diyl group, phenanthrene-2,7-diyl group, fluorene-2,7-diyl group, trans-1,4-cyclohexylene group, 1,2,3, 4-tetrahydronaphthalene-2,6-diyl group, decahydronaphthalene-2,
6-diyl group, trans-1,3-dioxane-2,5-diyl group,
A pyridine-2,5-diyl group, a pyrimidine-2,5-diyl group, a pyrazine-2,5-diyl group or a pyridazine-2,5-diyl group, l and m are each independently 0, 1 or 2 for Z
⁵ , Z ⁶ , Z ⁷ and Z ⁸ are each independently a single bond, -CH = CH-, -C
OO -, - OCO -, - CH 2 CH 2 -, - (CH 2) 4 -, - OCH 2 -, - CH 2 O- or -
Represents C≡C-, X ⁸ is a cyano group, a fluorine atom, a chlorine atom,
Represents a trifluoromethoxy group, a trifluoromethyl group, a difluoromethoxy group, a hydrogen atom, a 3,3,3-trifluoroethoxy group, R 'or -OR', and R 'is a straight-chain having 1 to 12 carbon atoms. alkyl group or represents a 2-12 linear alkenyl group, X ^7, X ⁹ represents a hydrogen atom, a fluorine atom or a chlorine atom. 4. The liquid crystal composition according to claim 1, wherein the liquid crystal composition comprises one or more compounds selected from the group consisting of: 5. The compound of the general formula (III), wherein ring B, ring C
And at least one ring of ring D is 2-fluoro-1,4-
Phenylene group, 3-fluoro-1,4-phenylene group or 2,3-
The compound which is a difluoro-1,4-phenylene group, characterized in that it contains one or more compounds, 1, 2, 3 or
4. The liquid crystal composition according to 4. 6. The compound according to claim 1, wherein the compound has at least two compounds having the structures of general formulas (I-1), (I-2) and (I-3).
6. The liquid crystal composition according to any one of items 1 to 5, 7. The method according to claim 1, wherein the maximum temperature of the nematic phase is 65 ° C. or higher, the minimum temperature of the nematic phase is -20 ° C. or lower, and the anisotropy (Δn) of the refractive index is in the range of 0.05 to 0.24. Item 7. The liquid crystal composition according to any one of items 1 to 6. 8. The liquid crystal composition according to claim 1, wherein the dielectric anisotropy Δε is smaller than −1.5. 9. A liquid crystal display device using the liquid crystal composition according to claim 1. Description: 10. An IPS mode or VA mode liquid crystal display device using the liquid crystal composition according to claim 1. Description: