CN103740376B - Containing negative dielectric anisotropy liquid crystal composition and the application thereof of two fluorine bis cyclohexane compound - Google Patents

Containing negative dielectric anisotropy liquid crystal composition and the application thereof of two fluorine bis cyclohexane compound Download PDF

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CN103740376B
CN103740376B CN201310746451.5A CN201310746451A CN103740376B CN 103740376 B CN103740376 B CN 103740376B CN 201310746451 A CN201310746451 A CN 201310746451A CN 103740376 B CN103740376 B CN 103740376B
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crystal composition
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CN103740376A (en
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陈海光
陈卯先
杭德余
姜天孟
田会强
储士红
贺树芳
孙丽丽
张琳
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Beijing Bayi Space LCD Technology Co Ltd
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Abstract

The present invention relates to a kind of negative dielectric anisotropy liquid crystal composition, or rather, the present invention relates to the negative dielectric anisotropy liquid crystal composition containing one or more two fluorine bis cyclohexane structural compounds, and its application; Said composition is mainly used in electric light and regulates, and is particularly useful for the VA escope of FFS indicating meter, IPS indicating meter and MVA/PVA/PSVA configuration.Liquid-crystal composition provided by the invention, has large optical anisotropy and excellent low temperature intersolubility, and good high temperature and UV stability, is applicable in the fast-response display unit of plurality of display modes; Overcome the shortcoming that optical anisotropy is less, effectively improve the optical anisotropy of composition, reduce the thickness of liquid crystal layer, accelerate the response speed of liquid-crystal display with this; It is applied in liquid crystal indicator, and the problem of the obvious improving device low-response of energy, has huge application prospect and marketable value.

Description

Containing negative dielectric anisotropy liquid crystal composition and the application thereof of two fluorine bis cyclohexane compound
Technical field
The present invention relates to liquid-crystal composition field, be specifically related to a kind of negative dielectric anisotropy liquid crystal composition, or rather, the present invention relates to the negative dielectric anisotropy liquid crystal composition containing one or more two fluorine bis cyclohexane structural compounds, and its application; Said composition is mainly used in electric light and regulates, and is particularly useful for the VA escope of FFS indicating meter, IPS indicating meter and MVA/PVA/PSVA configuration.
Background technology
Within 1888, Austrian botanist FriedrichReinitzer has found the first liquid crystal material M-nitro benzoic acid cholesterol (cholesterylbenzoate), namely liquid crystal, that is a kind of material has possessed the mobility of liquid and certain alignment characteristics of similar crystal simultaneously.M.Born(1916) and K.Lichtennecker(1926) find respectively and have studied the dielectric anisotropy of liquid crystal.1932, nematic phase was divided into the large class of positive and negative property two by W.Kast accordingly.Nineteen twenty-seven, V.Freedericksz and V.Zolinao finds that nematic liquid crystal is under electric field (or magnetic field) effect, deformation occurs and there is voltage threshold (Freederichsz transformation).This making being found to be liquid-crystal display provides foundation.Utilize the electrooptic effect of liquid crystal, British scientist has manufactured first piece of liquid-crystal display and LCD display in last century.Compared with traditional CRT, LCD not only volume is little, thickness is thin, lightweight, power consumption less, operating voltage is low, and radiationless, flicker free directly mating with CMOS unicircuit.Because its advantage is numerous, LCD entered desktop computer Application Areas from 1998.Nearly decades, particularly the develop rapidly of information technology and people, to the continuous pursuit of information display methods, make liquid-crystal display obtain the swiftest and the most violent development in recent ten years.Today, liquid-crystal display is just illustrated in face of people with colourful form, and its many products make it just become the pursuit of fashion due to the characteristic of its excellence, and process the available commodity of hand in market.
According to the arrangement mode of liquid crystal molecule, often liquid-crystal display to be divided into: the TN(TwistedNematic at narrow visual angle), STN(SuperTwistedNematic), DSTN(DoublelayerSuperTwistedNematic) etc., liquid-crystal composition used in the liquid-crystal display at these narrow visual angles is Dielectric positive.Wide viewing angle have IPS(In-PlaneSwitching), VA(VerticalAlignment), FFS(FringeFiledSwitching) etc., for the liquid-crystal display of wide viewing angle, the liquid crystal media majority used is negative dielectric anisotropic, wherein IPS both can use the liquid-crystal composition of negative dielectric anisotropic, also can use the liquid-crystal composition of positive dielectric anisotropy.From the type of drive of liquid crystal panel, modal is at present TFT(ThinFilmTransistor) type driving, the passive drive before comparing can realize meticulousr display effect.Current most of liquid-crystal display, LCD TV and part mobile phone all adopt TFT to drive.The TN pattern at the multiplex narrow visual angle of liquid-crystal display, VA, IPS isotype of the multiplex wide viewing angle of LCD TV, they are commonly referred to as TFT-LCD.
There is the slow shortcoming of response speed in the liquid-crystal display that prior art provides, the response speed of liquid-crystal display is mainly limited to the rotary viscosity of thickness of liquid crystal layer and liquid crystal, reduce thickness of liquid crystal layer and can effectively accelerate liquid-crystal display response speed, this just needs the optical anisotropy promoting liquid-crystal composition.
Liquid-crystal display response speed is determined by following formula:
τ off = γd 2 π 2 K 33
△ n*d=constant; γ is the rotary viscosity of liquid crystal; D is thickness of liquid crystal layer; K 33for the bend elastic constant of liquid crystal; △ n is liquid crystal optics anisotropy; △ n*d is the optical delay amount of liquid crystal layer.
As can be seen from above formula, improving liquid-crystal display response speed just needs reduce thickness of liquid crystal layer and reduce liquid crystal rotary viscosity.Be applied to the liquid-crystal composition of liquid-crystal display if develop, can above-mentioned purpose be realized, certainly will will have the economic worth of huge application prospect.
Summary of the invention
For problems of the prior art, the object of this invention is to provide a kind of negative dielectric anisotropy liquid crystal composition containing two fluorine bis cyclohexane compound.This liquid-crystal composition has low viscosity and larger optical anisotropy, and thus possesses light stability and the thermostability of fast-response speed and excellence, is applicable to the liquid crystal indicator of fast-response.
Another object of the present invention is to provide the described application of negative dielectric anisotropy liquid crystal composition in liquid crystal indicator containing two fluorine bis cyclohexane compound.
To achieve these goals, the negative dielectric anisotropy liquid crystal composition containing two fluorine bis cyclohexane compound provided by the invention, comprises the component of following weight percent:
(1) 5% ~ 50% general formula I A is or/and compound representated by IB;
Compound representated by (2) 10% ~ 80% general formulas II;
Compound representated by (3) 0% ~ 60% general formula III;
Compound representated by (4) 1% ~ 20% general formula I V;
Wherein, the structural formula of the compound representated by described general formula I A, IB, II, III, IV is as follows:
Wherein, R 1, R 2, R 3, R 5, R 7and R 8represent alkyl independently of one another;
R 4and R 6represent alkyl or alkoxyl group independently of one another; N=0 or 1.
Further, R 1, R 2, R 3, R 5, R 7and R 8represent C independently of one another 1~ C 12alkyl; R 4and R 6represent C independently of one another 1~ C 12alkyl or C 1~ C 12alkoxyl group.
Further, R 1, R 2, R 3, R 5, R 7and R 8represent C independently of one another 2~ C 5alkyl; R 4represent C 1~ C 5alkyl or C 2~ C 5alkoxyl group; R 6represent C 2~ C 5alkyl or C 1~ C 5alkoxyl group.
Alkyl used in the present invention and alkoxyl group, all preferred straight chain.
Further, R 1and R 2can be identical or different, R 3and R 4can be identical or different, R 5and R 6can be identical or different, R 7and R 8can be identical or different.
Wherein, the weight percent of the compound representated by described general formula III preferably 10% ~ 60%.
Preferably, the negative dielectric anisotropy liquid crystal composition containing two fluorine bis cyclohexane compound provided by the invention, comprises the component of following weight per-cent:
(1) 10% ~ 50% general formula I A is or/and compound representated by IB;
Compound representated by (2) 10% ~ 70% general formulas II;
Compound representated by (3) 10% ~ 60% general formula III;
Compound representated by (4) 1% ~ 20% general formula I V.
More preferably, the negative dielectric anisotropy liquid crystal composition containing two fluorine bis cyclohexane compound provided by the invention, comprises the component of following weight per-cent:
(1) 10% ~ 40% general formula I A is or/and compound representated by IB;
Compound representated by (2) 10% ~ 70% general formulas II;
Compound representated by (3) 10% ~ 60% general formula III;
Compound representated by (4) 5% ~ 20% general formula I V.
Wherein, preferably, one or more in the compound representated by formula IA-1 ~ formula IA-16 of the compound representated by described general formula I A:
Wherein, preferably, one or more in the compound representated by formula IB-1 ~ formula IB-16 of the compound representated by described general formula I B:
Wherein, preferably, the compound representated by described general formula I I is formula IIA, one or more in compound representated by formula IIB or formula IIC:
Wherein, R 3for C 2~ C 5alkyl, R 4for C 2~ C 5alkoxyl group (in formula IIA), R4 ' is C 2~ C 5alkoxyl group (in formula IIB), R 4' ' be C 1~ C 5alkyl (in formula IIC).
Wherein, more preferably, one or more in the compound representated by formula IIA-1 ~ formula IIA-12, formula IIB-1 ~ formula III B-12 or formula IIC-1 ~ formula III C-20 of the compound representated by described general formula I I:
Wherein, preferably, one or more in the compound representated by formula III A or formula III B of the compound representated by described general formula III:
Wherein, R 5for C 2~ C 5alkyl, R 6' be C 2~ C 5alkyl (in formula III A), R 6' ' be C 1~ C 5alkoxyl group (in formula III B).
Wherein, more preferably, one or more in the compound representated by formula III A-1 ~ formula III A-16 or formula III B-1 ~ formula III B-20 of the compound representated by described general formula III:
Wherein, preferably, one or more in the compound representated by formula IVA-1 ~ formula IVA-16 of the compound representated by described general formula I V:
The present invention also provides above-mentioned any one containing the application of negative dielectric anisotropy liquid crystal composition in liquid crystal indicator of two fluorine bis cyclohexane compound.
Wherein, above-mentioned any one provided by the invention contains the application of negative dielectric anisotropy liquid crystal composition in liquid crystal indicator of two fluorine bis cyclohexane compound, the application especially in the VA escope of FFS indicating meter, IPS indicating meter or MVA/PVA/PSVA configuration.
In the component of the negative dielectric anisotropy liquid crystal composition containing two fluorine bis cyclohexane compound of the present invention:
Two fluorine bis cyclohexane compounds representated by general formula I have certain negative dielectric anisotropic, and viscosity is low, sees the earliest in JP4669085 patent, but there is the little problem of optical anisotropy;
The compound of 2,3-difluoro class formations representated by general formula I I has stronger negative dielectric anisotropic, and viscosity is low, and two ring like structure clearing points are low, and tricyclic antidepressants has higher clearing point;
Twin nuclei viscosity representated by general formula III is low, has the effect reducing system viscosity in mixed crystal;
Fourth Ring terphenyl structure compound representated by general formula I V is non-polar compound, has large optical anisotropy and high clearing point, effectively can promote clearing point and the optical anisotropy of system.
The present invention mainly adds the compound representated by general formula I, can increase system dielectric anisotropy, reduces the viscosity of system simultaneously, to improve the response speed of liquid crystal.
The preparation method of the negative dielectric anisotropy liquid crystal composition containing two fluorine bis cyclohexane compound of the present invention is without particular restriction, ordinary method can be adopted two or more compound to be produced, at high temperature different components is mixed and method soluble in one another preparation as passed through, wherein, liquid-crystal composition to be dissolved in the solvent for this compound and to mix, then under reduced pressure distilling out this solvent; Or the negative dielectric anisotropy liquid crystal composition containing two fluorine bis cyclohexane compound of the present invention can conventionally be prepared, as component less for wherein content being dissolved at a higher temperature in the larger main ingredient of content, or each affiliated component is dissolved in organic solvent, as acetone, chloroform or methyl alcohol etc., obtain after then solvent being removed in solution mixing.
Negative dielectric anisotropy liquid crystal composition containing two fluorine bis cyclohexane compound provided by the invention, there is large optical anisotropy and excellent low temperature intersolubility, and good high temperature and UV stability, be applicable in the fast-response display unit of plurality of display modes; Overcome the shortcoming that optical anisotropy is less, effectively improve the optical anisotropy of composition, reduce the thickness of liquid crystal layer, accelerate the response speed of liquid-crystal display with this; It is applied in liquid crystal
In display unit, the problem of the obvious improving device low-response of energy, has huge application prospect and marketable value.
Embodiment
Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
In the embodiment of the present invention, the preparation of liquid-crystal composition is all adopted with the following method: the preparation of uniform liquid crystal adopts the heat of solution method generally used in the industry, first liquid crystalline cpd is weighed by weight percentage with balance, wherein weigh addition sequence without particular requirement, usually mixing is weighed successively with liquid crystalline cpd fusing point order from high to low, at 60 ~ 100 DEG C, heated and stirred makes each component melt evenly, again after filtration, revolve steaming, finally encapsulate and obtain target sample.
Except as otherwise noted, in context, per-cent is weight percentage, and all temperature are degree Celsius to provide.Use following abbreviation:
△ n is optical anisotropy (20 DEG C, 589nm); Δ ε is dielectric anisotropy (25 DEG C, 1000Hz); V 10for threshold voltage, it is the character voltage (V, 25 DEG C) when relative permeability changes 10%; η is volume viscosity (mm 2/ s, 20 DEG C); Cp is the clearing point (DEG C) of liquid-crystal composition; τ offfor the OFF state time of response, characterize liquid crystal after removing voltage, relative permeability changes the time (ms, 25 DEG C) of 90%; △ n*d is the optical delay amount (μm) of liquid crystal layer; γ 1 is the rotary viscosity (mPa.s, 25 DEG C) of liquid crystal.
In the present invention, the compound representated by general formula I I, III and IV can be provided by Beijing Bayi Space LCD Materials Technology Co., Ltd..
For the ease of representing, in following examples, unit structure coded representation shown in table 0 in liquid crystalline cpd:
Table 0: the unit structure code of liquid crystalline cpd
For following structure:
This structure represents by code listed in Table 1, be then expressed as 3HH (2F) 3;
For another example following structure:
This structure represents by code listed in Table 1, be then expressed as 3HHFF3;
For another example following structure:
This structure represents by code listed in Table 1, be then expressed as 2HBGB3.
Embodiment 1
Get the liquid crystalline cpd of following weight percent, and obtain liquid-crystal composition with above-mentioned preparation method's preparation, the performance perameter of the liquid-crystal composition (each component non-) of concrete proportioning and gained is in table 1.
Table 1: the performance perameter of the weight percent of each component when integrally combined thing in the liquid-crystal composition of embodiment 1
The formula numbers of component Code Weight percent (%) Performance perameter Parameter value
IA-5 2HHFF3 17 △n 0.095
IIA-2 3HWO2 10 △ε -2.8
IIA-4 5HWO2 8 V 10 2.50
IIB-1 2HHWO2 4 η 19
IIB-2 3HHWO2 10 Cp 76
IIB-4 5HHWO2 6 τ off 4.0
IIC-1 2HHW1 9 △n*d 0.32
IIC-2 3HHW1 8 γ1 75
IIIA-4 5HB2 6
IIIB-2 3HBO1 6
IIIB-6 3HBO2 6
IVA-13 5HBGB2 5
IVA-10 4HBGB3 5
Embodiment 2
Get the liquid crystalline cpd of following weight percent, and obtain liquid-crystal composition with above-mentioned preparation method's preparation, the performance perameter of the liquid-crystal composition (each component non-) of concrete proportioning and gained is in table 2.
Table 2: the performance perameter of the weight percent of each component when integrally combined thing in the liquid-crystal composition of embodiment 2
The formula numbers of component Code Weight percent (%) Performance perameter Parameter value
IB-5 2HH(2F)3 20 △n 0.095
IA-6 3HHFF3 20 △ε -2.0
IIB-1 2HHWO2 10 V 10 3.05
IIIA-4 5HB2 6 η 15
IIIB-2 3HBO1 6 Cp 80
IIIB-6 3HBO2 6 τ off 3.0
IIIB-7 4HBO2 6 △n*d 0.32
IIIB-8 5HBO2 6 γ1 55
IVA-10 4HBGB3 7
IVA-13 5HBGB2 7
IVA-14 5HBGB3 6
Embodiment 3
Get the liquid crystalline cpd of following weight percent, and obtain liquid-crystal composition with above-mentioned preparation method's preparation, the performance perameter of the liquid-crystal composition (each component non-) of concrete proportioning and gained is in table 3.
Table 3: the performance perameter of the weight percent of each component when integrally combined thing in the liquid-crystal composition of embodiment 3
The formula numbers of component Code Weight percent (%) Performance perameter Parameter value
IA-5 3HHFF3 10 △n 0.090
[0105]
IIB-1 2HHWO2 10 △ε -1.5
IIB-2 3HHWO2 10 V 10 3.21
IIB-4 5HHWO2 5 η 15
IIIA-4 5HB2 6 Cp 70
IIIB-2 3HBO1 8 τ off 3.5
IIIB-3 4HBO1 8 △n*d 0.32
IIIB-4 5HBO1 6 γ1 45
IIIB-6 3HBO2 8
IIIB-7 4HBO2 8
IIIB-8 5HBO2 8
IIIB-14 3HBO4 8
IVA-13 5HBGB2 5
Embodiment 4
Get the liquid crystalline cpd of following weight percent, and obtain liquid-crystal composition with above-mentioned preparation method's preparation, the performance perameter of the liquid-crystal composition (each component non-) of concrete proportioning and gained is in table 4.
Table 4: the performance perameter of the weight percent of each component when integrally combined thing in the liquid-crystal composition of embodiment 4
The formula numbers of component Code Weight percent (%) Performance perameter Parameter value
IA-5 3HHFF3 10 △n 0.105
IIA-2 3HWO2 10 △ε -4.0
IIA-4 5HWO2 10 V 10 2.25
IIA-10 3HWO4 10 η 25
IIB-2 3HHWO2 10 Cp 100
IIB-4 5HHWO2 5 τ off 5.0
IIB-6 3HHWO3 8 △n*d 0.32
IIC-1 2HHW1 9 γ1 101
IIC-2 3HHW1 8
IIIB-2 3HBO1 5
IIIB-6 3HBO2 5
IVA-13 5HBGB2 5
IVA-10 4HBGB3 5
Embodiment 5
Get the liquid crystalline cpd of following weight percent, and obtain liquid-crystal composition with above-mentioned preparation method's preparation, the performance perameter of the liquid-crystal composition (each component non-) of concrete proportioning and gained is in table 5.
Table 5: the performance perameter of the weight percent of each component when integrally combined thing in the liquid-crystal composition of embodiment 5
The formula numbers of component Code Weight percent (%) Performance perameter Parameter value
IA-5 2HHFF3 20 △n 0.096
IA-6 3HHFF3 20 △ε -3.5
IA-10 3HHFF4 10 V 10 2.32
IIA-2 3HWO2 10 η 20
IIA-4 5HWO2 10 Cp 75
IIB-6 3HHWO3 10 τ off 4.5
IVA-13 5HBGB2 7 △n*d 0.32
IVA-14 5HBGB3 7 γ1 90
IVA-10 4HBGB3 6
Embodiment 6
Get the liquid crystalline cpd of following weight percent, and obtain liquid-crystal composition with above-mentioned preparation method's preparation, the performance perameter of the liquid-crystal composition (each component non-) of concrete proportioning and gained is in table 6.
Table 6: the performance perameter of the weight percent of each component when integrally combined thing in the liquid-crystal composition of embodiment 6
The formula numbers of component Code Weight percent (%) Performance perameter Parameter value
IA-5 2HHFF3 20 △n 0.100
IB-6 3HH(2F)3 20 △ε -3.7
IIA-10 3HWO4 10 V 10 2.32
IIA-2 3HWO2 10 η 20
IIA-4 5HWO2 10 Cp 75
IIB-6 3HHWO3 10 τ off 4.3
IVA-13 5HBGB2 7 △n*d 0.32
IVA-14 5HBGB3 7 γ1 98
IVA-10 4HBGB3 6
Comparative example 1
Get the liquid crystalline cpd of following weight percent, and obtain liquid-crystal composition with above-mentioned preparation method's preparation, the performance perameter of the liquid-crystal composition (each component non-) of concrete proportioning and gained is in table 7.
Table 7: the performance perameter of the weight percent of each component when integrally combined thing in the liquid-crystal composition of comparative example 1
Component Weight percent (%) Performance perameter Parameter value
3HH2 8 △n 0.080
3HH5 9 △ε -3.0
2HHW1 9 V 10 2.45
3HHW1 8 η 20
3HHWO2 12 Cp 68
5HHWO2 11 τ off 5.0
3HWO2 16 △n*d 0.32
5HWO2 14 γ1 82
3HBO1 6
5HB2 7
In negative dielectric anisotropy liquid crystal composition of the present invention, the liquid-crystal composition prepared with component proportion each in embodiment 1 ~ 4 has light stability and the thermostability of large optical anisotropy and excellence, is applicable in the liquid crystal indicator of fast-response because having low viscosity simultaneously.
The each component proportion of negative dielectric anisotropy liquid crystal composition for using in prior art in comparative example 1, it is less that the liquid-crystal composition prepared with this proportioning mainly also exists optical anisotropy, cause required thickness of liquid crystal layer comparatively large, so the problem that the time of response is slower.Embodiment 1 is relative to comparative example 1, and embodiment 1 has lower viscosity and larger optical anisotropy, so indicating meter thickness of liquid crystal layer is less, so the time of response is faster than comparative example 1.
Negative dielectric anisotropy liquid crystal composition provided by the present invention has light stability and the thermostability of low viscosity, high resistivity, larger optical anisotropy and excellence, the problem that liquid-crystal display response speed is slow can be solved, be applicable to the liquid crystal indicator of fast-response.
Although above with general explanation, embodiment and test, the present invention is described in detail, and on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, all belong to the scope of protection of present invention.

Claims (11)

1., containing a negative dielectric anisotropy liquid crystal composition for two fluorine bis cyclohexane compound, be made up of the component of following weight percent:
(1) 10% ~ 50% general formula I A is or/and compound representated by IB;
Compound representated by (2) 10% ~ 70% general formulas II;
Compound representated by (3) 10% ~ 60% general formula III;
Compound representated by (4) 1% ~ 20% general formula I V;
Wherein, the structural formula of the compound representated by described general formula I A, IB, II, III, IV is as follows:
Wherein, described R 1, R 2, R 3, R 5, R 7and R 8represent C independently of one another 2~ C 5alkyl; R 4represent C 1~ C 5alkyl or C 2~ C 5alkoxyl group; R 6represent C 2~ C 5alkyl or C 1~ C 5alkoxyl group, n=0 or 1.
2. liquid-crystal composition according to claim 1, is characterized in that, described R 1and R 2identical or different, R 3and R 4identical or different, R 5and R 6identical or different, R 7and R 8identical or different.
3. liquid-crystal composition according to claim 2, is characterized in that, this liquid-crystal composition is made up of the component of following weight per-cent:
(1) 10% ~ 40% general formula I A is or/and compound representated by IB;
Compound representated by (2) 10% ~ 70% general formulas II;
Compound representated by (3) 10% ~ 60% general formula III;
Compound representated by (4) 5% ~ 20% general formula I V.
4. the liquid-crystal composition according to claims 1 to 3 any one, is characterized in that, one or more in the compound representated by formula IA-1 ~ formula IA-16 of the compound representated by described general formula I A:
One or more in compound representated by described general formula I B compound representated by formula IB-1 ~ formula IB-16:
5. the liquid-crystal composition according to claims 1 to 3 any one, is characterized in that, the compound representated by described general formula I I is formula IIA, one or more in compound representated by formula IIB or formula IIC:
Wherein, R 3for C 2~ C 5alkyl, R 4for C 2~ C 5alkoxyl group, R4 ' is C 2~ C 5alkoxyl group, R 4" be C 1~ C 5alkyl.
6. the liquid-crystal composition according to claims 1 to 3 any one, is characterized in that, one or more in the compound representated by formula III A or formula III B of the compound representated by described general formula III:
Wherein, R 5for C 2~ C 5alkyl, R 6' be C 2~ C 5alkyl, R 6" be C 1~ C 5alkoxyl group.
7. the liquid-crystal composition according to claims 1 to 3 any one, is characterized in that, one or more in the compound representated by formula IVA-1 ~ formula IVA-16 of the compound representated by described general formula I V:
8. liquid-crystal composition according to claim 5, is characterized in that, one or more in the compound representated by formula IIA-1 ~ formula IIA-12, formula IIB-1 ~ formula IIB-12 or formula IIC-1 ~ formula IIC-20 of the compound representated by described general formula I I:
9. liquid-crystal composition according to claim 6, is characterized in that, one or more in the compound representated by formula III A-1 ~ formula III A-16 or formula III B-1 ~ formula III B-20 of the compound representated by described general formula III:
10. the application of negative dielectric anisotropy liquid crystal composition in liquid crystal indicator containing two fluorine bis cyclohexane compound described in claim 1 ~ 9 any one.
11. application according to claim 10, is characterized in that, described liquid crystal indicator is the VA escope of FFS indicating meter, IPS indicating meter or MVA/PVA/PSVA configuration.
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