JP2001019965A - Liquid crystal composition and liquid crystal display element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition having a proper value of reflectance anisotropy, a low viscosity, a large value of negative dielectric anisotropy and a wide nematic phase range and useful as a liquid crystal display element by including specific compounds. SOLUTION: This composition is obtained by including (A) at least one kind of compound selected from the group consisting of compounds represented by formula I (R1 is a 1-13C alkyl or a 2-10C alkenyl; R2 is a 1-10C alkyl, a 1-10C alkoxy or the like; 23 is a single bond or CH2CH2), (B) at least one kind of compound selected from the group consisting of compounds represented by formula II (R3 is same as R1; R4 is same as R2; Z2 and Z3 are each same as Z1) or the like and (C) at least one kind of compound selected from the group consisting of compounds represented by formula III (R7 is same as R1; R8 is same as R2) or the like. The amounts of the components are preferably 3-40 wt.% of the component A, 3-70 wt.% of the component B and 5-90 wt.% of the component C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nematic liquid crystal composition having a negative dielectric anisotropy value and a liquid crystal display device using the liquid crystal composition. More specifically, the present invention relates to a liquid crystal composition having a negative dielectric anisotropy value for an active matrix liquid crystal display device, and a liquid crystal display device using the composition.

[0002]

2. Description of the Related Art A liquid crystal display (LCD) has a lower power consumption, a smaller size and a lighter weight than a CRT (CRT display), and therefore has a twisted nematic (TN) type and a super twisted nematic (LCD). STN)
Various types of L such as a thin film transistor (TFT) method
CDs have been put into practical use. Among them, active matrix LCDs (AM-
(LCD) has been attracting attention as a favorite of flat displays as colorization and definition have progressed.

[0003] The characteristics required of the liquid crystal composition for AM-LCD include: 1) a high voltage holding ratio (VHR) for maintaining a high contrast of the LCD, and 2) a response for a change in a use environment. A wide nematic liquid crystal phase range, 3) an appropriate refractive index anisotropy value (Δn) can be obtained according to the cell thickness, and 4) an appropriate threshold voltage can be obtained according to the driving circuit. Can be mentioned. As the operation method of the AM-LCD, a TN display method in which the orientation of liquid crystal molecules between the upper and lower electrode substrates is twisted by 90 ° has been mainly used.
There is a drawback that it is difficult to apply to a large screen because the viewing angle is narrow.

Therefore, the modes for improving the viewing angle are as follows: a) When no voltage is applied, the liquid crystal display element shows a homogeneous alignment state, and when a voltage is applied, 45 to 9 liquid crystal molecules are in-plane.
0 ° rotating IPS display method (R.Kiefer, B.Weber, FW
“In-Plane Switching of” by indscheid and G. Baur
Nematic LiquidCrystals ”, JAPAN DISPLAY '92, P.54
7) and b) VA display method in which the liquid crystal display element shows a homeotropic alignment state when no voltage is applied and changes to a horizontal unidirectional alignment state when a voltage is applied (K. Ohmuro, S. Kataoka, TS
"Development of Super-Hi" by asaki and Y. Koike
gh-Image-QualityVertical-Alignment-Mode LCD ”, SID
97 DIGEST. P.845). These display methods are characterized by high response speed and high contrast in addition to realizing a wide viewing angle, and have a dielectric anisotropy value (△
It has a great feature that a liquid crystal composition having a negative ε) can be applied.

[0005] These modes of operation are based on the birefringence mode (Elec
trically Controlled Birefringence Mode). To obtain the optimum contrast, the product of the refractive index anisotropy value (Δn) and the cell thickness (d) is set to a certain value, for example, Δ
It is necessary to set n · d = 0.275 μm or the like. With this setting, a value of about 0.05 to 0.13 is required as the value of Δn in order to apply to a cell thickness of 2 to 6 μm. Since the response time is proportional to the viscosity of the liquid crystal composition (hereinafter sometimes abbreviated as η), a low η
There is a demand for a liquid crystal composition having In addition, since the threshold voltage becomes lower as the absolute value of the dielectric anisotropy value (hereinafter may be abbreviated as Δε) becomes larger, a liquid crystal composition having a large negative Δε is required. I have.

An example of a novel compound having a negative Δε and a composition using the compound is disclosed in JP-A-6-228037, but the Δε value of those compositions is positive, and Group containing a compound,
The value of the voltage holding ratio (VHR) decreases, and the AM-LCD
Has the disadvantage that it cannot be applied to Although various studies have been made on the liquid crystal composition depending on the purpose as described above,
At present, new improvements are always required.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid crystal display having an appropriate value of Δn which can be applied to the display methods a) and b) which can realize a wide viewing angle, and has a low viscosity and a large negative voltage. It is an object of the present invention to provide a liquid crystal composition having a Δε of a wide range and a nematic phase range, and having various other characteristics required for the liquid crystal composition for AM-LCD.

[0008]

The present inventors have conducted intensive studies on compositions using various liquid crystal compounds in order to solve these problems. As a result, several types of compounds of the following first to third components were obtained. It has been found that the intended purpose can be achieved by a liquid crystal composition containing.

That is, the present invention has the following constitutions [1] to [4]. [1] A first aspect of the present invention is that at least one selected from the group consisting of compounds represented by the general formula (I) as the first component
And a compound represented by the general formula (II-
It contains at least one compound selected from the group consisting of the compounds represented by 1) and (II-2), and has a third component represented by the general formula (III-1), (III-2) or (III-
A liquid crystal composition containing at least one compound selected from the group consisting of compounds represented by 3) or (III-4).

[0010]

Embedded image

[0011]

Embedded image (Wherein, R ¹ , R ³ , R ⁵ , R ⁷ , R ⁹ , R ¹¹ and R ¹³ each independently represent an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, R ² , R ⁴ , R
⁶ , R ⁸ , R ¹⁰ , R ¹² and R ¹⁴ each independently represent an alkyl group having 1 to 10 carbon atoms, an alkoxy group or
And 10 represents an alkenyl group, and Z _{1 to} Z ₅ each independently represent a single bond or —CH ₂ CH ₂ —. )

[2] The second aspect of the present invention is that the first component is 3 to 40% by weight and the second component is 3% by weight based on the total weight of the liquid crystal composition.
The liquid crystal composition according to the item [1], wherein the content of the third component is 5 to 90% by weight, and the content of the third component is 5 to 90% by weight.

[3] A third aspect of the present invention comprises, as a first component, at least one compound selected from the group consisting of compounds represented by the general formula (I), and a second component represented by the general formula (I) It contains at least one compound selected from the group consisting of compounds represented by II-1) or (II-2), and has a third component represented by general formula (III-1), (III-2),
It contains at least one compound selected from the group consisting of compounds represented by (III-3) or (III-4), and has a fourth component represented by the general formula (IV-1), (IV-2) or The liquid crystal composition according to item [1] or [2], further comprising at least one compound selected from the group consisting of compounds represented by (IV-3). .

[0014]

Embedded image (Wherein, R ¹⁵ , R ¹⁷ and R ¹⁹ each independently represent an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and R ¹⁶ , R ¹⁸ and R ²⁰ each independently represent a carbon number. It represents an alkyl group of 1 to 10, an alkoxy group or an alkenyl group of 2 to 10 carbon atoms, and Z _{6 to} Z ₁₀ each independently represent a single bond or —CH ₂ CH ₂ —.)

[4] A fourth aspect of the present invention is the above [1] to [1].
A liquid crystal display device using the liquid crystal composition according to any one of [3].

Hereinafter, the compounds constituting each component of the present invention will be described. The compound represented by the general formula (I) as the first component has a refractive index anisotropy value (Δn) of about 0.08.
０．１0.12, and a dielectric anisotropy value (Δ
ε) is in the range of about −9 to −6 and is excellent in thermal stability and chemical stability.
It plays a role in lowering the threshold voltage and viscosity of the liquid crystal composition for T. However, the clearing point (T _C) of approximately -2
Since the temperature is in the range of 0 to 30 ° C., it is not preferable to adjust a composition having a negative Δε using only these compounds, because the clearing point (T _C ) of the composition becomes small.

The compound represented by the general formula (II-1) or (II-2) as the second component has a refractive index anisotropy value (値
n) is about 0.08 to 0.21, and the dielectric anisotropy value (Δ
ε) is in the range of about −8 to −5, and the clearing point (T _C ) is in the range of about 120 to 180 ° C. Since these compounds of the second component are excellent in thermal stability and chemical stability, they play a role in further increasing the Tc in addition to lowering the threshold voltage of the liquid crystal composition.

The third component represented by the general formula (III-1) or (III
The compound represented by -2) or (III-3) has a clearing point (T _C ) of about 10 to 80 ° C. and a refractive index anisotropy value (Δn) of about 0.01 to 0.07. Since it is within the range, it plays a role in reducing Δn of the composition. Further, the compound represented by the general formula (III-1) or (III-2)
In particular, it also plays a role in reducing the viscosity of the composition. General formula (II
The compound represented by I-4) has a refractive index anisotropy value (Δn)
Is about 0.10 to 0.15, and the clearing point (T _C ) is in the range of about 130 to 190 ° C., so that it plays a role particularly to increase the clearing point (T _C ). Therefore, the Δn, viscosity and nematic phase range of the composition can be adjusted by adding the third component. By arbitrarily combining several kinds of compounds of the first to third components, the object of the present invention is to provide a suitable Δn and a particularly large negative dielectric anisotropy value for a low viscosity AM-LCD. A liquid crystal composition can be prepared. A clear point (T _C ) in the range of about 60-120 ° C., a refractive index anisotropy value (Δn) in the range of about 0.06-0.12, and a dielectric constant in the range of about −7 to −1. A liquid crystal composition having an anisotropic value (Δε), a low viscosity, and a wide nematic phase can be obtained.

The compound represented by the general formula (IV-1), which is the fourth component, has a clearing point (T) in the range of about −20 to 30 ° C.
_C ) having a refractive index anisotropy value (Δn) in the range of about 0.06-0.12 and a dielectric anisotropy value (Δε) in the range of about −7 to −3, and being thermally stable Excellent in properties and chemical stability. In addition, general formula (IV-2) or (IV-3)
Has a clearing point (T _C ) in the range of about 120 to 180 ° C., a refractive index anisotropy value (Δn) in the range of about 0.08 to 0.21, and a value of about −7 to −4. , And excellent in thermal stability and chemical stability. The compound represented by the general formula (IV-1), (IV-2) or (IV-3) has a role of lowering the threshold voltage and the viscosity of the liquid crystal composition for TFT which requires high reliability. Carry. Therefore, the value of Δε can be further finely adjusted by adding the fourth component, and a composition having a large negative Δε, a low viscosity, and a wide nematic phase can be obtained by arbitrarily combining the first to fourth components. Can be prepared.

Next, the amount of each of the above components will be described. In the following description, unless otherwise specified,% by weight indicates the ratio to the total weight of the liquid crystal composition. In the liquid crystal composition of the present invention, the use amount of the first component is preferably 3 to 40% by weight. A more preferred amount is 5 to 5.
35% by weight. If the amount is less than 3% by weight, the absolute value of Δε (negative) of the liquid crystal composition becomes small, and the threshold voltage may be undesirably increased. When it exceeds 40 wt%, sometimes the compatibility at low temperatures of the liquid crystal composition is deteriorated, and because sometimes the clearing point of the liquid crystal composition (T _C) is lowered undesirably. The use amount of the second component of the present invention is preferably 3 to 70% by weight, and more preferably 5 to 65% by weight.
Is more preferred. If it is less than 3% by weight, the absolute value of Δε (negative) of the liquid crystal composition may be small, which is not preferable. On the other hand, if it exceeds 70% by weight, the compatibility of the liquid crystal composition at low temperatures may deteriorate, which is not preferable. The use amount of the third component of the present invention is preferably 5 to 90% by weight, more preferably 10 to 85% by weight. If the amount is less than 5% by weight, the compatibility of the liquid crystal composition at low temperatures may deteriorate, which is not preferable. If it exceeds 90% by weight, the absolute value of Δε of the liquid crystal composition becomes small, so that the threshold voltage may be undesirably increased.

The synthesis method of the compound represented by the general formula (III-1) used in the present invention is described in JP-A-59-70624 and JP-A-60-16940.
The compound represented by formula (III-4) is disclosed in
No. 165328 describes a synthesis method. The synthesis method of the compound represented by formula (IV-1), (IV-2) or (IV-3) is described in JP-A-6-228037. Formula (I), (II-1) or (II-
The compound represented by 2) is prepared by synthesizing a piperidine derivative by the synthesis method described in JP-A-58-216157, and by the same procedure as the compounds of the general formulas (IV-1) to (IV-3). can do. As described above, the compound of each component constituting the composition of the present invention can be synthesized by the prior art.

The liquid crystal composition of the present invention can be prepared by a generally used conventional method, that is, a method in which various components are dissolved at a high temperature. Further, the liquid crystal composition of the present invention may be added to a guest host (GH) mode by adding a dichroic dye such as a merocyanine-based, styryl-based, azo-based, azomethine-based, azoxy-based, quinophthalone-based, anthraquinone-based or tetrazine-based dye. As a liquid crystal composition. Alternatively, a polymer dispersion type represented by a liquid crystal composition for a liquid crystal display device (NCAP) prepared by microencapsulating a nematic liquid crystal or a polymer network liquid crystal display device (PNLCD) prepared by forming a three-dimensional network polymer in a liquid crystal. It can also be used as a liquid crystal composition for a liquid crystal display device (PDLCD). Further, it can be used as a liquid crystal composition to which at least one or more chiral compounds are added. In addition, it can be used as a liquid crystal composition for a birefringence control (ECB) mode or a dynamic scattering (DS) mode.

[0023]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. In Comparative Examples and Examples, all percentages indicating composition ratios are% by weight, and compounds are represented by symbols based on the definitions shown in Table 1. In the characteristic data of the liquid crystal composition, the clearing point was T _C , the lower limit of the nematic phase transition temperature was T _SN , the viscosity at 20 ° C. was η ₂₀ , the refractive index anisotropy value at 25 ° C. was Δn, and 25 ° C. Was expressed by Δε. T _SN is 0 ° C., −10 ° C., −20 ° C., −
The liquid crystal phase was determined after being left for 30 days in each freezer set at 30 ° C. and −40 ° C. All Δε were measured by preparing a liquid crystal display element. That is, for each of the obtained liquid crystal compositions, a cell in which the liquid crystal composition is homeotropically aligned and a cell in which the liquid crystal composition is homogeneously aligned are prepared, and the dielectric constant in the direction of the symmetry axis and the dielectric constant in the direction perpendicular to the symmetry axis are measured. Thus, Δε was obtained.

[0024]

[Table 1]

JP-A-8-1 having the same object as the present invention
The following compositions disclosed in Examples 1 and 2 of Japanese Patent No. 04869 were prepared, and the physical properties described above were measured. Comparative Example 1 (Example 1) 3-HB (2F, 3F) -O2 9.0% 5-HB (2F, 3F) -O2 9.0% 3-HHB (2F, 3F) -O2 12.0% 5 -HHB (2F, 3F) -O2 14.0% 3-HHB (2F, 3F) -2 25.0% 2-HH-3 5.0% 3-HH-4 10.0% 3-HH-O1 5.0% 3-HH-O3 6.0 % 5-HH-O1 5.0% T C = 85.6 (℃) T SN <-10 ℃ Δn = 0.075 Δε = -3.0 η 20 = 24.2 (mPa · s)

Comparative Example 2 (Example 2) 3-HB (2F, 3F) -O2 12.0% 5-HB (2F, 3F) -O2 11.0% 3-HHB (2F, 3F) -O2 14. 0% 5-HHB (2F, 3F) -O2 15.0% 3-HHB (2F, 3F) -2 24.0% 2-HH-3 5.0% 3-HH-4 6.0% 3- HH-O1 4.0% 3-HH-O3 5.0% 5-HH-O1 4.0% T _C = 85.7 (° C.) T _SN <−10 ° C. Δn = 0.079 Δε = −3. 8 η ₂₀ = 25.3 (mPa · s)

Example 1 3-NhB (2F, 3F) -O1 7.0% 3-NhB (2F, 3F) -O2 7.0% 5-NhB (2F, 3F) -O1 9.0% 5- NhB (2F, 3F) -O2 9.0% 3-HNhB (2F, 3F) -O1 10.0% 5-HNhB (2F, 3F) -O1 10.0% 5-HNhB (2F, 3F) -O2 11.0% 3-NhBB (2F, 3F) -O2 6.0% 5-NhBB (2F, 3F) -O2 7.0% 2-HH-3 4.0% 3-HH-4 6.0% 3-HH-O1 4.0% 3-HH-O3 5.0% 5-HH-O1 5.0% T _C = 88.0 (° C.) T _SN <−20 ° C. Δn = 0.092 Δε = − 5.8 η ₂₀ = 26.3 (mPa · s) The liquid crystal composition shown in Example 1 has Δ 著 し く which is significantly negatively large as compared with Comparative Example 2. It can be seen that it has. Further, it can be seen that the nematic phase range is also expanded by 10 ° C. or more.

Example 2 3-NhB (2F, 3F) -O1 5.0% 3-NhB (2F, 3F) -O2 5.0% 3-HNhB (2F, 3F) -O1 9.0% 3- HNhB (2F, 3F) -O2 9.0% 3-NhBB (2F, 3F) -O2 11.0% 5-NhBB (2F, 3F) -O2 11.0% 2-HH-3 5.0% 3 -HH-4 12.0% 3-HB -O2 16.0% 3-HB-O4 7.0% 2-HH-EMe 4.0% 3-HH-EMe 6.0% T C = 85.5 (° C.) T _SN <−20 ° C. Δn = 0.091 Δε = −3.3 η ₂₀ = 17.8 (mPa · s) In Example 2, a liquid crystal having T _C and Δε substantially equivalent to Comparative Example 1. A composition. It can be seen that the viscosity of Example 2 is significantly lower than that of Comparative Example 1. Further, it can be seen that the nematic phase range is also expanded by 10 ° C. or more.

Example 3 3-NhB (2F, 3F) -O2 5.0% 3-HNhB (2F, 3F) -O1 10.0% 3-HNhB (2F, 3F) -2 10.0% 5- HNhB (2F, 3F) -O1 10.0% 5-HNhB (2F, 3F) -O2 10.0% 3-NhBB (2F, 3F) -O2 12.0% 5-NhBB (2F, 3F) -O2 12.0% 2-HH-3 5.0 % 3-HH-4 5.0% 3-HB-2 16.0% 3-HB-4 5.0% T C = 113.9 (℃) T _SN <−20 ° C. Δn = 0.104 Δε = −4.8 η ₂₀ = 26.6 (mPa · s)

Example 4 3-NhB (2F, 3F) -O1 9.0% 3-NhB (2F, 3F) -O2 9.0% 5-NhB (2F, 3F) -O1 10.0% 5- NhB (2F, 3F) -O2 10.0% 3-HNhB (2F, 3F) -O1 5.0% 3-HH-4 5.0% 3-HB-2 12.0% 3-HB-4 5 5.0% 2-HH-EMe 5.0% 3-HH-EMe 10.0% 2-HHB-1 4.0% 3-HHB-1 6.0% 3-HHB-3 5.0% 3- HHB-O1 5.0% T _C = 62.7 (° C.) T _SN <−20 ° C. Δn = 0.084 Δε = −2.2 η ₂₀ = 18.7 (mPa · s)

Example 5 V-NhB (2F, 3F) -O1 9.0% 3-NhB (2F, 3F) -O2 9.0% 5-NhB (2F, 3F) -O1 10.0% 5- NhB (2F, 3F) -O2 10.0% V-HNhB (2F, 3F) -O1 5.0% V-HH-3 5.0% 3-HB-2 12.0% 3-HB-45 2.0% 2-HH-EMe 5.0% 3-HH-EMe 10.0% V-HHB-1 4.0% 3-HHB-1 6.0% 3-HHB-3 5.0% 3- HHB-O1 5.0% T _C = 59.4 (° C.) T _SN <−20 ° C. Δn = 0.096 Δε = −1.9 η ₂₀ = 17.6 (mPa · s)

Example 6 3-NhB (2F, 3F) -O1 9.0% 3-NhB (2F, 3F) -O2 9.0% 5-NhB (2F, 3F) -O1 10.0% 5- NhB (2F, 3F) -2 10.0% 3-HNhB (2F, 3F) -O1 7.0% 3-HNhB (2F, 3F) -O2 7.0% 5-HNhB (2F, 3F) -O1 8.0% 5-HNhB (2F, 3F) -O2 9.0% 3-NhBB (2F, 3F) -O2 6.0% 5-NhBB (2F, 3F) -O2 7.0% 2-HH- 3 4.0% 3-HH-4 10.0% 3-HH-EMe 4.0% T C = 91.1 (℃) T SN <-20 ℃ Δn = 0.096 Δε = -6.2 η ₂₀ = 30.2 (mPa · s)

Example 7 3-NhB (2F, 3F) -O1 5.0% 3-NhB (2F, 3F) -O2 5.0% 5-NhB (2F, 3F) -O1 4.0% 5- NhB (2F, 3F) -O2 4.0% 3-HNhB (2F, 3F) -O1 10.0% 5-HNhB (2F, 3F) -1 10.0% 5-HNhB (2F, 3F) -2 11.0% 2-HH-3 4.0% 3-HH-4 10.0% 3-HH-O1 5.0% 3-HH-O3 5.0% 3-HB (2F, 3F) -O2 7.0% 5-HB (2F, 3F) -O2 7.0% 3-HBB (2F, 3F) -O2 3.0% 3-HHB (2F, 3F) -O2 10.0% T C = 87 0.4 (° C.) T _SN <−20 ° C. Δn = 0.086 Δε = −5.0 η ₂₀ = 27.2 (mPa · s)

Example 8 3-NhB (2F, 3F) -O1 5.0% 3-NhB (2F, 3F) -O2 5.0% 5-NhB (2F, 3F) -O1 4.0% 5- NhB (2F, 3F) -O2 4.0% V-HNhB (2F, 3F) -O1 10.0% 5-HNhB (2F, 3F) -1 10.0% 5-HNhB (2F, 3F) -2 11.0% 2-HH-3 4.0% 3-HH-4 10.0% 3-HH-O1 5.0% 3-HH-O3 5.0% 3-HB (2F, 3F) -O2 7.0% V-HB (2F, 3F) -O2 7.0% V-HBB (2F, 3F) -O2 6.0% 3-HHB (2F, 3F) -O2 7.0% T C = 82 0.5 (° C.) T _SN <−20 ° C. Δn = 0.090 Δε = −4.6 η ₂₀ = 25.2 (mPa · s)

[0035]

According to the present invention, an AM having a suitable value of Δn which can correspond to various cell thicknesses, a low viscosity, a large negative dielectric anisotropy value and a wide nematic phase range,
-It was possible to provide a liquid crystal composition having various other characteristics required for a liquid crystal composition for LCD.

Continued on the front page F term (reference) 4H027 BA01 BA02 BB01 BB02 BB04 BB06 BB11 BB12 BC04 BD02 BD03 BD07 BD11 BD21 BE05 CK05 CM01 CM02 CM05 CN05 CQ05 CR05 CT01 CT02 CT05 CW01 CW02 CW03 DB05 DC05

Claims (4)

[Claims] 1. A compound comprising at least one compound selected from the group consisting of compounds represented by formula (I) as a first component, and a compound represented by formula (II-1) or (II- It contains at least one compound selected from the group consisting of compounds represented by 2), and has a third component represented by the general formula (III-1), (III-2), (III-3) or (I-3)
A liquid crystal composition comprising at least one compound selected from the group consisting of compounds represented by II-4). Embedded image Embedded image (Wherein, R ¹ , R ³ , R ⁵ , R ⁷ , R ⁹ , R ¹¹ and R ¹³ each independently represent an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, R ² , R ⁴ , R
⁶ , R ⁸ , R ¹⁰ , R ¹² and R ¹⁴ each independently represent an alkyl group having 1 to 10 carbon atoms, an alkoxy group or
And 10 represents an alkenyl group, and Z _{1 to} Z ₅ each independently represent a single bond or —CH ₂ CH ₂ —. ) 2. The liquid crystal composition according to claim 1, wherein the first component is 3 to 40% by weight, the second component is 3 to 70% by weight, and the third component is 5 to 90% by weight based on the total weight of the liquid crystal composition. The liquid crystal composition according to claim 1, 3. A compound comprising at least one compound selected from the group consisting of compounds represented by formula (I) as a first component, and a compound represented by formula (II-1) or (II-) as a second component. It contains at least one compound selected from the group consisting of compounds represented by 2), and has a third component represented by the general formula (III-1), (III-2), (III-3) or (I-3)
It contains at least one compound selected from the group consisting of compounds represented by II-4), and is represented by the general formula (IV-1), (IV-2) or (IV-3) as a fourth component. The liquid crystal composition according to claim 1, further comprising at least one compound selected from the group consisting of compounds to be formed. Embedded image (Wherein, R ¹⁵ , R ¹⁷ and R ¹⁹ each independently represent an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and R ¹⁶ , R ¹⁸ and R ²⁰ each independently represent a carbon number. It represents an alkyl group of 1 to 10, an alkoxy group or an alkenyl group of 2 to 10 carbon atoms, and Z _{6 to} Z ₁₀ each independently represent a single bond or —CH ₂ CH ₂ —.) 4. A liquid crystal display device using the liquid crystal composition according to claim 1.