CN105018106B - Liquid-crystal composition - Google Patents
Liquid-crystal composition Download PDFInfo
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- CN105018106B CN105018106B CN201510407775.5A CN201510407775A CN105018106B CN 105018106 B CN105018106 B CN 105018106B CN 201510407775 A CN201510407775 A CN 201510407775A CN 105018106 B CN105018106 B CN 105018106B
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- 0 *c(cc1)ccc1-c1cc(F)c(-c2ccc(*)cc2)c(F)c1 Chemical compound *c(cc1)ccc1-c1cc(F)c(-c2ccc(*)cc2)c(F)c1 0.000 description 8
- VEHFIENJXUETFC-UHFFFAOYSA-N CCCC(CC(C)(C)NCC)OC(CCCCCCCCC(OC1CC(C)(C)NCC1)=O)=O Chemical compound CCCC(CC(C)(C)NCC)OC(CCCCCCCCC(OC1CC(C)(C)NCC1)=O)=O VEHFIENJXUETFC-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a kind of liquid-crystal composition, comprising compound shown in compound shown in one or more formulas I and one or more formulas II, and the liquid-crystal composition includes compound shown in II AWherein each substituent provides its definition.Liquid-crystal composition provided by the present invention has low viscosity γ1, moderate dielectric anisotropy Δ ε, moderate or larger optical anisotropy Δ n, it is possible to achieve the quick response of liquid crystal display.
Description
Technical field
The present invention relates to field of liquid crystal display, and in particular to a kind of liquid-crystal composition and the liquid crystal comprising the liquid-crystal composition
Display element or liquid crystal display.
Background technology
At present, what the application of liquid-crystal compounds was expanded is increasingly wider, and it can be applied to polytype display, electricity
In optical device, sensor etc..Species for the liquid-crystal compounds of above-mentioned display field is various, and wherein nematic liquid crystal is using most
To be extensive.Nematic liquid crystal is had been applied in passive TN, STN matrix display and system with tft active matrix.
For thin-film transistor technologies (TFT-LCD) application field, although market is very huge in recent years, technology
It is gradually ripe, but requirement of the people to Display Technique also constantly improving, and is especially realizing quick response, reduction driving electricity
Pressure is with terms of reducing power consumption.Liquid crystal material is as one of important photoelectron material of liquid crystal display, to improving liquid crystal display
The performance of device plays an important role.
As liquid crystal material it is necessary to have good chemically and thermally stability and to electric field and the stabilization of electromagnetic radiation
Property.And as thin-film transistor technologies (TFT-LCD) liquid crystal material, do not need only to have as outside upward stability, should also have
Wider nematic temperature range, suitable birefringence anisotropy, very high resistivity, good uviolresistance
The performances such as energy, high electric charge conservation rate and low-steam pressure.
Show and apply for dynamic menu, eliminate display picture ghost and hangover, it is desirable to which liquid crystal has response speed quickly
Degree, therefore it is required that liquid crystal has relatively low rotary viscosity γ1；In addition, for portable set, in order to reduce equipment energy consumption, wishing
Hope that the driving voltage of liquid crystal is as low as possible；And for the display of the purposes such as TV, for the driving voltage requirement of liquid crystal
It is not so low.
The viscosity of liquid-crystal compounds, especially rotary viscosity γ1The response time after liquid crystal power-up is directly affected, either
Rise time (ton) or fall time (toff), all rotary viscosity γ with liquid crystal1It is proportional, rise time (ton) by
In relevant with liquid crystal cell and driving voltage, it can be adjusted by increasing the method for driving voltage with reduction liquid crystal cell box thickness；And
Fall time (toff), mainly with the elastic constant of liquid crystal with liquid crystal cell box thickness relevant, box thick decline unrelated with driving voltage
(t can be reduced fall timeoff), and under different display modes, the motion mode of liquid crystal molecule is different, tri- kinds of moulds of TN, IPS, VA
Formula respectively with average elastic constants K, distortion elastic constant, bend elastic constant inversely.
According to liquid crystal continuum theory, after a variety of liquid crystal are deformed upon under external force (electric field, magnetic field) effect, meeting
By intermolecular interaction, original shape is returned in meeting " resilience "；Likewise, liquid crystal is also due to intermolecular interaction
Power formation " viscosity ".The minor variations of liquid crystal molecule, can make the conventional parameter performance of liquid crystal occur obvious change, these changes
Have plenty of certain rule, seeming of having is difficult to find rule, can also be produced for the interaction between liquid crystal molecule substantially
Influence, these influences are very delicate, also do not form very perfect theoretical explanation so far.
The viscosity of liquid crystal is relevant with liquid crystal molecule structure, studies the viscosity and liquid of the liquid crystal system of different liquid crystal molecule formation
Relation between brilliant molecular structure is one of vital task of dispensing liquid crystal engineer.
The content of the invention
A kind of liquid crystal display cells it is an object of the invention to provide liquid-crystal composition and comprising the liquid-crystal composition or
Liquid crystal display, the liquid-crystal composition has relatively low viscosity, it is possible to achieve quick response, at the same have moderate dielectric each to
Different in nature Δ ε, moderate optical anisotropy Δ n (being more than 0.100), the high stability to light and heat.Include the liquid crystal combination
The liquid crystal display cells or liquid crystal display of thing have wider nematic temperature range, suitable or higher birefringence each
The performances such as anisotropy Δ n, very high resistivity, good anti-ultraviolet property, high electric charge conservation rate and low-steam pressure.
In order to realize above-mentioned advantageous effects, the invention provides a kind of liquid-crystal composition.Liquid provided by the present invention
Crystal composite includes compound shown in compound shown in one or more formulas I and one or more formulas II, and the liquid crystal
Composition includes compound shown in II-A
Wherein, X1、X2、X3、X4F or H, and X are represented independently of one another1、X2、X3、X4In at least two represent F；
R1、R2、R3、R4The alkane that the carbon number for alkyl, the fluorine substitution that carbon number is 1-9 is 1-9 is represented independently of one another
Alkenyl that alkoxy that alkoxy that base, carbon number are 1-9, the carbon number of fluorine substitution are 1-9, carbon number are 2-9,
The carbon number of alkenyl, the alkenyloxy that carbon number is 3-8 or fluorine substitution that the carbon number of fluorine substitution is 2-9 is 3-8
Alkenyloxy, and work as X1、X3、X4When representing F simultaneously, R2Alkenyl is not indicated that；
Represent 1,4- phenylenes, 1,4- cyclohexylidenes or 1,4- cyclohexadienylidenes.
Liquid-crystal composition provided by the present invention must be comprising compound shown at least one formula I, and must include formula
Compound shown in the-A of compound Chinese style shown in II II, can also comprising in compound shown in one or more formulas II except the-A of formula II with
Other outer compounds.
Preferably, liquid-crystal composition provided by the present invention does not include the liquid-crystal compounds containing-CN, and not
Include the liquid-crystal compounds containing pyridine or pyrimidine ring.
The liquid-crystal compounds of the invention for not containing condensed cyclic structure further preferably.
Liquid-crystal composition Δ n [589nm, 25 DEG C] provided by the present invention>0.08, Δ ε [1KHz, 25 DEG C]>2, clearing point
Cp>70.0 DEG C, rotary viscosity γ1[25 DEG C] are between 40~110mPas.
- CN has very big permanent dipole moment, and electron cloud is compared with horn of plenty, it is easy to which Liquidity limit is so as to cause liquid crystal electricity
The decline of performance, such as electric charge conservation rate VHR, electricalresistivityρ, power consumption etc.；Pyridine, pyrimidine cycle compound due under UV electronics it is easy
Cause quality decline in being excited.
It is linear that condensed cyclic structure liquid crystal molecule has not often possessed, and viscosity is bigger than normal, is unfavorable for improving liquid containing these compositions
Brilliant response speed.
Liquid-crystal composition provided by the present invention, compound preferred mass content is 1-20% wherein shown in formula I；- the A of formula II
Shown compound preferred content is 20-40%；Compound preferred content shown in formula II is 25-55%
Compound shown in formula I is preferably compound shown in the 1- I 6 of formula I：
Wherein, R1、R2The alkane that the carbon number for alkyl, the fluorine substitution that carbon number is 1-9 is 1-9 is represented independently of one another
Alkenyl that alkoxy that alkoxy that base, carbon number are 1-9, the carbon number of fluorine substitution are 1-9, carbon number are 2-9,
The carbon number of alkenyl, the alkenyloxy that carbon number is 3-8 or fluorine substitution that the carbon number of fluorine substitution is 2-9 is 3-8
Alkenyloxy, and R in formula I 32Alkenyl is not indicated that；
Compound shown in one or more formulas II is comprising compound shown in the-A of formula II and preferably comprises II 1-
One or more compounds in compound shown in II 10,
Compound shown in formula I generally has the intersolubility good with other liquid crystal, and specifically has higher light
Anisotropy Δ n (being more than 0.200) is learned, optical anisotropy Δ n can be with R1、R2、X1、X2、X3、X4Change and slightly become
Change, general trend is lengthening, the adding for fluorine atom substituent with atomic number of alkyl carbon and slightly diminished, otherwise can slightly have
Become big.Alkoxy substituent participates in conjugation due to the lone electron of oxygen atom, can typically increase Δ n.
Compound shown in formula I has positive dielectric anisotropy Δ ε (between 2-7), X1、X2、X3、X4All it is directed towards molecule
Long axis direction formation dipole moment, and with additive effect, so the dielectric anisotropy Δ ε containing more F atom liquid crystal
Can be larger, on the contrary can be smaller.
Compound shown in formula II has very low rotary viscosity γ1, close to neutral dielectric anisotropy Δ ε, less
Optical anisotropy Δ n, has advantage improving liquid crystal viscosity, cryogenic property.Rotation of the different alkyl substituents to liquid crystal
Viscosity γ1, clearing point CP all there is influence, general, longer alkyl chain or alkenylene chain can increase the rotary viscosity γ of liquid crystal1
While clearing point CP is improved, but compound γ shown in the-A of formula II1It is minimum.
Liquid-crystal composition provided by the present invention, can also add compound shown in one or more formulas III
Wherein, R5Represent that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that carbon number is 1-9 is 1-9 are
Alkoxy that 1-9 alkoxy, the carbon number of fluorine substitution are 1-9, the alkenyl that carbon number is 2-9, fluorine substitution carbon it is former
The alkenyloxy that the carbon number of alkenyl, the alkenyloxy that carbon number is 3-8 or fluorine substitution that subnumber is 2-9 is 3-8；
Represent 1,4- phenylenes, 1,4- cyclohexylidenes or 1,4- cyclohexadienylidenes.
Liquid-crystal composition provided by the present invention, compound preferred mass content is 5-20% wherein shown in formula III.
Compound shown in formula III is particularly preferred as：
Compound light anisotropy Δ n shown in formula III is moderate, and dielectric anisotropy Δ ε is between 5-9, relatively low rotation
Viscosity γ1, clearing point CP is typically more than 120 DEG C, available for regulation mixed liquid crystal CP, Δ n, Δ ε, γ1Etc. parameter.The institute of formula III
Show the preferred R of compound5Represent C1-C5Straight chained alkyl compound.
Liquid-crystal composition provided by the present invention, can also add compound shown in one or more formulas IV
Wherein, R6Represent that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that carbon number is 1-9 is 1-9 are
Alkoxy that 1-9 alkoxy, the carbon number of fluorine substitution are 1-9, the alkenyl that carbon number is 2-9, fluorine substitution carbon it is former
The alkenyloxy that the carbon number of alkenyl, the alkenyloxy that carbon number is 3-8 or fluorine substitution that subnumber is 2-9 is 3-8；
N represents 0 or 1；
(F) H or F is represented.
Liquid-crystal composition provided by the present invention, compound preferred mass content is 5-20% wherein shown in formula IV.
The preferred R of compound shown in formula IV6Represent C1-C5Straight chained alkyl compound.Compound shown in formula IV has moderate
Δ ε, higher CP, relatively low viscosity is applied to the viscosity of adjustable liquid crystal display, CP, Δ ε.
Compound shown in formula IV is preferably in addition：
Liquid-crystal composition provided by the present invention, can also add compound shown in one or more formulas V
Wherein, R7、R8The alkane that the carbon number for alkyl, the fluorine substitution that carbon number is 1-9 is 1-9 is represented independently of one another
Alkenyl that alkoxy that alkoxy that base, carbon number are 1-9, the carbon number of fluorine substitution are 1-9, carbon number are 2-9,
The carbon number of alkenyl, the alkenyloxy that carbon number is 3-8 or fluorine substitution that the carbon number of fluorine substitution is 2-9 is 3-8
Alkenyloxy；
Y3、Y4H or F is represented, but can not be F simultaneously；
Represent 1,4- phenylenes, 1,4- cyclohexylidenes or 1,4- cyclohexadienylidenes.
Liquid-crystal composition provided by the present invention, compound preferred mass content is 2-15% wherein shown in formula V.
The preferred R of compound shown in formula V7、R8Represent C1-C5Straight chained alkyl compound.Compound shown in formula V has
Very high CP, is conducive to expanding the temperature in use scope of liquid crystal.
Compound shown in formula V is preferably in addition：
Liquid-crystal composition provided by the present invention, can also add compound shown in one or more formulas VI
Wherein, R9Represent that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that carbon number is 1-9 is 1-9 are
Alkoxy that 1-9 alkoxy, the carbon number of fluorine substitution are 1-9, the alkenyl that carbon number is 2-9, fluorine substitution carbon it is former
The alkenyloxy that the carbon number of alkenyl, the alkenyloxy that carbon number is 3-8 or fluorine substitution that subnumber is 2-9 is 3-8；
Represent 1,4- phenylenes, 1,4- cyclohexylidenes or 1,4- cyclohexadienylidenes；
Represent 1,4- phenylenes, fluoro 1,4- phenylenes, 1,4- cyclohexylidenes or 1,4- cyclohexadienylidenes；
R10Represent that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that F, carbon number are 1-9 is 1-9 are 1-9
Alkoxy, fluorine substitution carbon number be 1-9 alkoxy, carbon number be 2-9 alkenyl, fluorine substitution carbon number
The alkenyloxy that the carbon number of the alkenyloxy or fluorine that are 3-8 for 2-9 alkenyl, carbon number substitution is 3-8.
Liquid-crystal composition provided by the present invention, compound preferred mass content is 5-30% wherein shown in formula VI：
Compound shown in formula VI is preferably in addition：
Compound shown in formula VI -1, VI -2 is the close neutrality of dielectric anisotropy Δ ε, low rotary viscosity γ1, clearing point
Higher, K values are larger, can be used for the K values and γ for allocating liquid crystal1, so as to realize quick response.The compound of Terphenyls VI -5
Due to larger conjugated system, thus with very big optical anisotropy Δ n, be particularly suitable for use in the big refractive index of allotment
Mixed liquid crystal.
Liquid-crystal composition provided by the present invention, can also add compound shown in one or more formulas VII
Wherein, R11Represent that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that carbon number is 1-9 is 1-9 are
Alkoxy that 1-9 alkoxy, the carbon number of fluorine substitution are 1-9, the alkenyl that carbon number is 2-9, fluorine substitution carbon it is former
The alkenyloxy that the carbon number of alkenyl, the alkenyloxy that carbon number is 3-8 or fluorine substitution that subnumber is 2-9 is 3-8；
Represent 1,4- phenylenes, the 1,4- phenylenes of fluoro, 1,4- cyclohexylidenes, 1,4- cyclohexadienylidenes and/
Or one or disjunct two CH in 1,4- cyclohexylidenes2It is substituted with an oxygen the one or more in formed group；
P represents 2 or 3.
Liquid-crystal composition provided by the present invention, compound preferred mass content is 5-55% wherein shown in formula VII：
Compound shown in formula VII is preferably：
Compound shown in formula VII has larger dielectric anisotropy Δ ε, low rotary viscosity γ1, can be used for allotment
Liquid crystal compound is to reduce the response speed of liquid crystal drive voltage, quickening display device.
Liquid-crystal composition provided by the present invention, comprising or not comprising formula III, formula IV, formula V, formula VI, shown in formula VII
On the basis of compound, the change containing cycloalkyl shown in one or more formulas VIII -1, VIII -2 and/or VIII -3 can also be included
Compound
Wherein,Represent that 1,4- cyclohexylidenes, 1,4- are sub- independently of one another
The disjunct CH of one or both of cyclohexyl2Replaced the 1,4- of formed group, 1,4- phenylenes and/or fluoro sub- by O
One or more in phenyl；
Z1、Z2、Z3Singly-bound ,-CF are represented independently of one another2O- or-CH2O-；
M, k, g represent 1,2 or 3 independently of one another；
I represents 0,1,2；
R12Represent that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that F, carbon number are 1-9 is 1-9 are 1-9
Alkoxy, fluorine substitution carbon number be 1-9 alkoxy, carbon number be 2-9 alkenyl, fluorine substitution carbon number
The alkenyloxy that the carbon number of the alkenyloxy or fluorine that are 3-8 for 2-9 alkenyl, carbon number substitution is 3-8；
R13Represent that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that carbon number is 1-5 is 1-5 are 1-5's
Alkoxy, fluorine substitution carbon number be 1-5 alkoxy, carbon number be 2-5 alkenyl, fluorine substitution carbon number be
The alkenyloxy that the carbon number for alkenyloxy or the fluorine substitution that 2-5 alkenyl, carbon number is 3-5 is 3-5.
Compound shown in formula VIII does not contain the end group alkyl chain of softness, thus has between stronger rigidity, liquid crystal molecule
The change of relative effect, shows larger K values, higher CP.
Compound shown in VIII -1 is preferred：
Compound shown in VIII -2 is preferred：
Compound shown in VIII -3 is preferred：
The different proportion of each composition of liquid-crystal composition, can show slightly discrepant performance, such as dielectric anisotropy Δ
Transition temperature point CP, the low temperature stability inferior that ε, optical anisotropy Δ n, the nematic phase of liquid crystal are converted into liquid all can be poor
It is different, can apply to different types of display device, but it is identical the characteristics of be its rotary viscosity γ1It is relatively low.Applied to liquid crystal
Display device, it is possible to achieve quick response.
The dopant of various functions can also be added in liquid-crystal compounds provided by the present invention, dopant content is preferred
Between 0.01-1%, these dopants are mainly antioxidant, ultra-violet absorber, chiral agent.
Antioxidant, ultra-violet absorber are preferred：
S represents 1-10 integer.
Chiral agent is preferably (left-handed or dextrorotation)：
The invention further relates to the liquid crystal display cells comprising any one above-mentioned liquid-crystal composition or liquid crystal display；It is described
Display element or display are active matrix display element or display or passive matrix display element or display.
The preferred active array addressing liquid crystal display cells of liquid crystal display cells or liquid crystal display or liquid crystal display.
The active matrix display element or display are specially TN-TFT or IPS-TFT liquid crystal display cells or display
Device.
Liquid-crystal composition provided by the present invention has relatively low viscosity, it is possible to achieve quick response, while having moderate
Dielectric anisotropy Δ ε, moderate optical anisotropy Δ n, the high stability to light and heat.
Include the liquid crystal material of liquid-crystal composition provided by the present invention, not only with good chemically and thermally stability with
And to electric field and the stability of electromagnetic radiation.Moreover, using liquid crystal material as thin-film transistor technologies (TFT-LCD), also have
Wider nematic temperature range, suitable birefringence anisotropy, very high resistivity, good uviolresistance
The performances such as energy, high electric charge conservation rate and low-steam pressure.
Embodiment
With reference to specific embodiment, the present invention is further elaborated, but the present invention is not limited to following examples.Institute
It is conventional method unless otherwise instructed to state method.The raw material can be obtained from open commercial sources unless otherwise instructed.Institute
State percentage unless otherwise instructed, be mass percent.
In following embodiments,
CP represents clearing point, is directly determined using the micro- thermal analyzers of WRX-1S, sets heating rate as 3 DEG C/min.
Δ n represents optical anisotropy (589nm, 20 DEG C),
Δ ε represents dielectric anisotropy (25 DEG C, 1KHz, HP4284A, 5.2 microns of left-handed boxes of TN),
γ1Rotary viscosity (mpas) at 20 DEG C is represented, VHR (%) represents electric charge conservation rate (5V, 60Hz, 20 DEG C), ρ (×
1013Ω cm) resistivity (20 DEG C) is represented,
Voltage retention VHR (%) tester and electricalresistivityρ (× 1013Ω cm) be TOYO06254 and
TOYO6517 type liquid crystal evaluation of physical property system (20 DEG C of test temperature, time 16ms, testing cassete is 7.0 microns).
Embodiment 1
Δε[1KHz,20℃]：7.3
Δn[589nm,20℃]：0.105
Cp：75℃
γ1：68mPa.s.
Embodiment 2
Δε[1KHz,20℃]：4.1
Δn[589nm,20℃]：0.115
Cp：111℃
γ1：78mPa.s.
Embodiment 3
Δε[1KHz,20℃]：9.3
Δn[589nm,20℃]：0.146
Cp：123℃
γ1：83mPa.s.
Embodiment 4
Δε[1KHz,20℃]：7.5
Δn[589nm,20℃]：0.115
Cp：88℃
γ1：42mPa.s.
Embodiment 5
Δε[1KHz,20℃]：9.0
Δn[589nm,20℃]：0.106
Cp：86℃
γ1：51.5mPa.s.
Embodiment 6
Δε[1KHz,20℃]：8.0
Δn[589nm,20℃]：0.124
Cp：100℃
γ1：56mPa.s.
Embodiment 7
Δε[1KHz,20℃]：5
Δn[589nm,20℃]：0.156
Cp：66℃
γ1：49mPa.s.
As can be seen from the above embodiments：The liquid-crystal composition of the present invention has relatively low rotary viscosity γ1, for liquid crystal
Display, it is possible to achieve quick response.It is particularly suitable for TN, IPS pattern liquid crystal material.
Claims (9)
1. a kind of liquid-crystal composition, it is characterised in that the liquid-crystal composition include compound shown in one or more formulas I and
Compound shown in one or more formulas II, and the liquid-crystal composition includes compound shown in II-A
Wherein, X1Represent F, X2、X3、X4F or H, and X are represented independently of one another1、X2、X3、X4In at least two represent F；
R1、R3、R4Independently of one another represent carbon number be 1-9 alkyl group, fluorine substitution carbon number be 1-9 alkyl group,
The alkene that chain alkoxy that chain alkoxy that carbon number is 1-9, the carbon number of fluorine substitution are 1-9, carbon number are 2-9
Base, fluorine substitution carbon number be 2-9 alkenyl, carbon number be 3-8 alkenyloxy or fluorine substitution carbon number be
3-8 alkenyloxy；
R2Represent that alkyl group, carbon number that the carbon number for alkyl group, the fluorine substitution that carbon number is 1-9 is 1-9 are 1-9's
Chain alkoxy, the carbon number of fluorine substitution are 1-9 chain alkoxy, and work as X1、X3、X4When representing F simultaneously, R2Alkene is not indicated that
Base；
Represent 1,4- phenylenes, 1,4- cyclohexylidenes or 1,4- cyclohexadienylidenes；
The liquid-crystal composition is also comprising compound shown in one or more formulas VIII -1, formula VIII -2 and/or formula VIII -3
Wherein,1,4- cyclohexylidenes, 1,4- cyclohexylidenes are represented independently of one another
One or both of disjunct CH2In the 1,4- phenylenes for being replaced formed group, 1,4- phenylenes and/or fluoro by O
One or more；
Z1、Z2、Z3Singly-bound ,-CF are represented independently of one another2O- or-CH2O-；
M, k, g represent 1,2 or 3 independently of one another；
I represents 0,1,2；
R12Represent the alkane that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that F, carbon number are 1-9 is 1-9 are 1-9
Epoxide, fluorine substitution carbon number be 1-9 alkoxy, carbon number be 2-9 alkenyl, fluorine substitution carbon number be 2-
The alkenyloxy that the carbon number for alkenyloxy or the fluorine substitution that 9 alkenyl, carbon number are 3-8 is 3-8；
R13Represent the alcoxyl that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that carbon number is 1-5 is 1-5 are 1-5
Base, fluorine substitution carbon number be 1-5 alkoxy, carbon number be 2-5 alkenyl, fluorine substitution carbon number be 2-5
Alkenyl, carbon number be 3-5 alkenyloxy or fluorine substitution carbon number be 3-5 alkenyloxy.
2. liquid-crystal composition according to claim 1, it is characterised in that compound shown in one or more formulas I is
One or more in compound shown in the 1- I 6 of formula I：
Wherein, R1Represent that alkyl group, carbon number that the carbon number for alkyl group, the fluorine substitution that carbon number is 1-9 is 1-9 are
Alkenyl that chain alkoxy that 1-9 chain alkoxy, the carbon number of fluorine substitution are 1-9, carbon number are 2-9, fluorine replace
The alkene oxygen that the carbon number of alkenyl, the alkenyloxy that carbon number is 3-8 or fluorine substitution that carbon number is 2-9 is 3-8
Base；
R2Represent that alkyl group, carbon number that the carbon number for alkyl group, the fluorine substitution that carbon number is 1-9 is 1-9 are 1-9's
The chain alkoxy that chain alkoxy, the carbon number of fluorine substitution are 1-9, and R in formula I 32Alkenyl is not indicated that；
Compound shown in one or more formulas II includes one or more compounds in compound shown in the 1- II 10 of formula II：
3. liquid-crystal composition according to claim 1 or 2, it is characterised in that the liquid-crystal composition also comprising a kind of or
Compound shown in a variety of formulas III
Wherein, R5Represent that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that carbon number is 1-9 is 1-9 are 1-9's
Alkoxy, fluorine substitution carbon number be 1-9 alkoxy, carbon number be 2-9 alkenyl, fluorine substitution carbon number be
The alkenyloxy that the carbon number for alkenyloxy or the fluorine substitution that 2-9 alkenyl, carbon number is 3-8 is 3-8；
Represent 1,4- phenylenes, 1,4- cyclohexylidenes or 1,4- cyclohexadienylidenes.
4. liquid-crystal composition according to claim 1 or 2, it is characterised in that the liquid-crystal composition also comprising a kind of or
Compound shown in a variety of formulas IV：
Wherein, R6Represent that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that carbon number is 1-9 is 1-9 are 1-9's
Alkoxy, fluorine substitution carbon number be 1-9 alkoxy, carbon number be 2-9 alkenyl, fluorine substitution carbon number be
The alkenyloxy that the carbon number for alkenyloxy or the fluorine substitution that 2-9 alkenyl, carbon number is 3-8 is 3-8；
N represents 0 or 1；
(F) H or F is represented.
5. liquid-crystal composition according to claim 1 or 2, it is characterised in that the liquid-crystal composition also comprising a kind of or
Compound shown in a variety of formulas V：
Wherein, R7、R8Alkyl, carbon that the carbon number for alkyl, the fluorine substitution that carbon number is 1-9 is 1-9 are represented independently of one another
Alkenyl that alkoxy that alkoxy that atomicity is 1-9, the carbon number of fluorine substitution are 1-9, carbon number are 2-9, fluorine take
The chain that the carbon number of alkenyl, the alkenyloxy that carbon number is 3-8 or fluorine substitution that the carbon number in generation is 2-9 is 3-8
Alkenyloxy group；
Y3、Y4H or F is represented, but can not be F simultaneously；
Represent 1,4- phenylenes, 1,4- cyclohexylidenes or 1,4- cyclohexadienylidenes.
6. liquid-crystal composition according to claim 1 or 2, it is characterised in that the liquid-crystal composition also includes one kind
Or compound shown in a variety of formulas VI：
Wherein, R9Represent that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that carbon number is 1-9 is 1-9 are 1-9's
Alkoxy, fluorine substitution carbon number be 1-9 alkoxy, carbon number be 2-9 alkenyl, fluorine substitution carbon number be
The alkenyloxy that the carbon number for alkenyloxy or the fluorine substitution that 2-9 alkenyl, carbon number is 3-8 is 3-8；
Represent 1,4- phenylenes, 1,4- cyclohexylidenes or 1,4- cyclohexadienylidenes；
Represent 1,4- phenylenes, fluoro 1,4- phenylenes, 1,4- cyclohexylidenes or 1,4- cyclohexadienylidenes；
R10Represent the alkane that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that F, carbon number are 1-9 is 1-9 are 1-9
Epoxide, fluorine substitution carbon number be 1-9 alkoxy, carbon number be 2-9 alkenyl, fluorine substitution carbon number be 2-
The alkenyloxy that the carbon number for alkenyloxy or the fluorine substitution that 9 alkenyl, carbon number are 3-8 is 3-8.
7. liquid-crystal composition according to claim 1 or 2, it is characterised in that the liquid-crystal composition also includes one kind
Or compound shown in a variety of formulas VII：
Wherein, R11Represent that alkyl, carbon number that the carbon number for alkyl, the fluorine substitution that carbon number is 1-9 is 1-9 are 1-9
Alkoxy, fluorine substitution carbon number be 1-9 alkoxy, carbon number be 2-9 alkenyl, fluorine substitution carbon number
The alkenyloxy that the carbon number of the alkenyloxy or fluorine that are 3-8 for 2-9 alkenyl, carbon number substitution is 3-8；
Represent 1,4- phenylenes, the 1,4- phenylenes of fluoro, 1,4- cyclohexylidenes, 1,4- cyclohexadienylidenes and/or 1,4-
One or disjunct two CH in cyclohexylidene2It is substituted with an oxygen the one or more in formed group；
P represents 2 or 3.
8. a kind of liquid crystal display cells or liquid crystal display, it is characterised in that liquid crystal display cells or the liquid crystal display bag
Any liquid-crystal composition in 1-6 containing claim；The display element or display are active matrix display element or aobvious
Show device or passive matrix display element or display.
9. liquid crystal display cells according to claim 8 or liquid crystal display, it is characterised in that the Active Matrix LCD At
Element or display are TN-TFT or IPS-TFT liquid crystal display cells or display.
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