CN108239542A - Liquid-crystal composition and its display device with negative dielectric anisotropic - Google Patents
Liquid-crystal composition and its display device with negative dielectric anisotropic Download PDFInfo
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- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
- C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
- C09K2019/122—Ph-Ph
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- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
- C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
- C09K2019/301—Cy-Cy-Ph
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
- C09K2019/3016—Cy-Ph-Ph
Abstract
The invention discloses a kind of liquid-crystal composition of negative dielectric anisotropic, the liquid-crystal composition includes：Account for the negative liquid crystal composition total weight 20 65% one or more of general formulas I 1 and or I 2 compound；Account for the compound of one or more of general formulas II of the negative liquid crystal composition total weight 17 40%；Account for the compound of one or more of general formula IIIs of the negative liquid crystal composition total weight 14 40%；Account for the compound of one or more of general formulae IVs of the negative liquid crystal composition total weight 20 50%.The invention also discloses the liquid crystal display devices of the liquid-crystal composition including the present invention.
Description
Technical field
The present invention relates to a kind of liquid-crystal compositions, more particularly to a kind of to have appropriate high dielectric anisotropy, appropriate height
Clearing point, appropriate high optical anisotropy, good low temperature intersolubility, higher voltage retention, good high temperature it is steady
It is qualitative, good it is imparted can and the liquid-crystal composition of characteristics such as higher transmitance and including the liquid-crystal composition
Liquid crystal display device.
Background technology
Liquid crystal display element is developed to and is set for home-use various electrical equipments, measure since clock, calculator
Standby, automobile panel, word processor, electronic notebook, printer, computer, television set etc..As representative liquid crystal display side
Formula, can enumerate TN (twisted-nematic) type, STN types (super twisted nematic) type, DS (dynamic light scattering) type, GH (host and guest) type,
IPS (plane conversion) type, OCB (optical compensation birefringence) type, ECB (voltage control birefringence) type, VA (vertical orientated) type,
CSH (colored super vertical) type or FLC (Ferroelectric liquid Crystals) type etc..In addition, the type of drive as liquid crystal display device, also may be used
To enumerate static drive, multiplexing driving, in a manner of simple matrix, by TFT (thin film transistor (TFT)), TFD (thin film diode) etc. come
Active matrix (AM) mode of driving.
In these display modes, IPS types, ECB types, VA types or CSH types etc. have to be showed using dielectric anisotropy Δ ε
Feature as the liquid-crystal composition of negative value.In these display modes, especially by the VA type display mode quilts of AM drivings
For requiring the display element of high-speed response and wide viewing angle (such as television set etc.) purposes.
Liquid crystal material is needed with appropriate high dielectric anisotropy, optical anisotropy and good low temperature intersolubility
And thermal stability.In addition, liquid crystal material should also have low viscosity and short response time, low threshold voltage and high contrast.Root
The each to performance indicator of composition is further illustrated according to commercially available liquid crystal display element.Nematic temperature range and element
Operating temperature range is associated.Nematic ceiling temperature is preferably more than or equal to 70 DEG C, and nematic lower limit temperature
Preferably less than it is equal to -10 DEG C.The viscosity of composition is associated with the response time of element.It is dynamic in order to show in the component
It draws, the response time of preferably element is short.Therefore, the viscosity of preferably composition is small, and group when preferably temperature is low
The viscosity for closing object is small.
The optical anisotropy of composition is associated with the contrast of element.In order to make the contrast of liquid crystal display element ratio
It maximizes, it can be by optical anisotropy (product value (Δ n*d) setting of Δ n) and the thickness (d) of liquid crystal layer of liquid-crystal composition
Mode for fixed value is designed.Appropriate product value depends on the type of operating mode.Such as the appropriate value of the element of TN patterns
About 0.45 μm.During the situation, for the smaller element of thickness of liquid crystal layer, the preferably big combination of optical anisotropy
Object.
The liquid crystal display element of the big liquid-crystal composition of absolute value containing dielectric anisotropy can reduce basic voltage
Value reduces driving voltage, and can further reduce consumption of electric power.
The liquid crystal display element of liquid-crystal composition containing lower threshold voltage can effectively reduce the power consumption of display, special
It is not in consumables, the similar portable electronic products such as mobile phone, tablet computer have longer cruise duration.
The small liquid-crystal composition of viscosity, can improve liquid crystal display element response speed.When the response speed of liquid crystal display element
When spending fast, it is applicable to animation and shows.In addition, when injecting liquid-crystal composition into the liquid crystal cell of liquid crystal display element, can shorten
Injection length can improve workability.
Prior art discloses with low-power consumption, the liquid-crystal composition of fast-response, such as patent document CN102858918A, but
Environmental issue (use of such as chlorine-containing compound), service life short (such as UV or thermal stability are poor), comparison exists in the prior art
It spends low (showing that screen whitens under such as daylight) and can not take into account each in the appropriate optics of the requirements such as LCD TV, tablet computer
Anisotropy, appropriate dielectric anisotropic, high voltage holding ratio, anti-UV be stable and the balancing performance problem of high-temperature stable, it is impossible to
Meet various aspects index simultaneously.
From the preparation angle of liquid crystal material, the properties of liquid crystal material check and balance influence, a certain performance
The promotion of index may make other performances change.Therefore, preparing all suitable liquid crystal material of various aspects of performance often needs
Want creative work.
Liquid crystal material is the important component of liquid crystal display, and global liquid crystal display has very big market at present
Demand is chiefly used in electric equipment products, but its life cycle is shorter.Shorter life cycle naturally occurring waste pollution etc. is asked
Topic, in the case where nowadays environmentally protective problem is increasingly subject to the attention of various circles of society, if can be controlled from source, i.e., in liquid crystal
The material of environment-friendly and green is selected in the modulated process of material, just can greatly reduce the ring paid during processing waste liquid crystal display
Border cost.Therefore, it is all suitable to prepare various aspects of performance, and economic, environmentally protective liquid crystal material is often with greater need for creative labor
It is dynamic.
Since liquid crystal display can undergo visible ray UV radiation, high temperature during manufacture and use and seek for a long time
Location drives, and the reliability after these processes is undergone for liquid crystal material has very high requirement, therefore for the weather-proof of liquid crystal material
Property, thermal stability, high/low temperature storage performance, UV stability are also to have been a need for improved direction.
Invention content
The goal of the invention of the present invention is to provide a kind of liquid-crystal composition with negative dielectric anisotropic, has appropriate high
Dielectric anisotropy, appropriate high clearing point, appropriate high optical anisotropy, good low temperature intersolubility, higher voltage
The liquid-crystal composition of the characteristics such as conservation rate, good high-temperature stability, good imparted energy and higher transmitance.Packet
The display device of liquid-crystal composition containing the present invention has higher brightness and good uvioresistant performance, can particularly fit
For ambient compared in the strong and stronger environment of ultraviolet light.
Another goal of the invention of the present invention is to provide a kind of the aobvious of liquid-crystal composition comprising the negative dielectric anisotropic
Show device.
In order to complete foregoing invention purpose, the present invention provides a kind of liquid-crystal composition, the liquid-crystal composition has negative
Dielectric anisotropy, it includes：
Account for the negative liquid crystal composition total weight 20-65% one or more of general formulas I -1 and or I -2 chemical combination
Object
Account for the compound of one or more of general formulas II of the negative liquid crystal composition total weight 17-40%
Account for the compound of one or more of general formula IIIs of the negative liquid crystal composition total weight 14-40%
Account for the compound of one or more of general formulae IVs of the negative liquid crystal composition total weight 20-50%
Wherein,
R1、R2、R3、R5、R7And R8It is identical or different, each independently represent the linear chain or branch chain that carbon atom number is 1 to 12
It is halogenated or be 2 to 12 halogenated or not by halogenated alkenyl or alkenyloxy group not by halogenated alkyl or alkoxy, carbon atom number；
R4And R6It is identical or different, each independently represent the alkyl for the linear chain or branch chain that carbon atom number is 1 to 12；
WithIt is identical or different, it each independently representsOrIt is describedOne or more of H atom can be replaced by F atom；
A represents 0,1 or 2, wherein, when a is 2,2 ringsIt can be identical or different.
In some embodiments of the present invention, preferably described R1、R2、R3、R5、R7And R8It is identical or different, it is respectively independent
Ground represent linear chain or branch chain halogenated that carbon atom number be 1-5 or not by halogenated alkyl or alkoxy or carbon atom number be 2 to
5 linear chain or branch chain halogenated or not by halogenated alkenyl；The further preferred R1、R3、R5、R7And R8It is identical or different, respectively
From the halogenated of the linear chain or branch chain that independently expression carbon atom number is 1-5 or not by halogenated alkyl or alkoxy or carbon atom
Number is for the halogenated of 2 to 5 linear chain or branch chain or not by halogenated alkenyl；Much further preferably from the R2、R4And R6It is identical or not
Together, the halogenated of the linear chain or branch chain that carbon atom number is 1-5 is each independently represented or not by halogenated alkyl or alkoxy；Especially
Preferably described R2、R4And R6It is identical or different, each independently represent linear chain or branch chain halogenated that carbon atom number is 1-5 or
Not by halogenated alkoxy.
In some embodiments of the present invention, it is preferably describedWithPhase
It is same or different, it each independently representsOrIt is describedOne or more of H it is former
Son can be replaced by F atom, wherein, it is describedMiddle one or more H atom can be replaced it to replace position not phase by F atom
It is adjacent.
In some embodiments of the present invention, preferred formula I -1 and or I -2 compound account for the negative liquid crystal group
Close object total weight 30-60%；The compound of general formula II accounts for the negative liquid crystal composition total weight 15-35%；The change of general formula III
It closes object and accounts for the negative liquid crystal composition total weight 15-35%；The compound of general formulae IV accounts for the negative liquid crystal composition gross weight
Measure 20-50%.
In some embodiments of the present invention, further preferred general formula I -1 and or I -2 compound account for the negativity
Liquid-crystal composition total weight 30-50%；The compound of general formula II accounts for the negative liquid crystal composition total weight 15-30%；General formula
III compound accounts for the negative liquid crystal composition total weight 15-30%；The compound of general formulae IV accounts for the negative liquid crystal combination
Object total weight 20-45%.
In some embodiments of the present invention, further preferred general formula I -1 and or I -2 compound account for the negativity
Liquid-crystal composition total weight 30-45%；The compound of general formula II accounts for the negative liquid crystal composition total weight 15-20%；General formula
III compound accounts for the negative liquid crystal composition total weight 15-20%；The compound of general formulae IV accounts for the negative liquid crystal combination
Object total weight 20-40%.
In some embodiments of the present invention, the compound of preferably described general formula I -1 is selected from following compound composition
Group：
In some embodiments of the present invention, particularly preferably the compound of the general formula I -1 is selected from following compound group
Into group：
In some embodiments of the present invention, the compound of preferred formula I -1 accounts for the negative liquid crystal composition gross weight
Measure 10-25%, further preferably 10-23%；Further preferably 10-20%.
In some embodiments of the present invention, the compound of preferably described general formula I -2 is selected from following compound composition
Group：
In some embodiments of the present invention, particularly preferably the compound of the general formula I -2 is selected from following compound group
Into group：
In some embodiments of the present invention, the compound of preferred formula I -2 accounts for the negative liquid crystal composition gross weight
Measure 15-35%；Further preferably 15-30%, further preferably 15-25%.
In some embodiments of the present invention, the compound of preferably described general formula II is selected from following compound composition
Group：
In some embodiments of the present invention, particularly preferably the compound of the general formula II is formed selected from following compound
Group：
In some embodiments of the present invention, the compound of preferably described general formula III is selected from following compound composition
Group：
In some embodiments of the present invention, particularly preferably the compound of the general formula III is formed selected from following compound
Group：
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV is selected from by following compounds group
Into group in one or more of compounds：
Wherein,
R7And R8It is identical or different, each independently represent the alcoxyl that alkyl, carbon atom number that carbon atom number is 1-5 are 1-5
The alkenyloxy group that the alkenyl or carbon atom number that base, carbon atom number are 2-5 are 2-5.
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -1 is selected from by following compounds
One or more of compounds in the group of composition：
In some embodiments of the present invention, the compound of preferred formula IV -1 accounts for the negative liquid crystal composition gross weight
Measure 20-45%, further preferably 25-42%.
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -2 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -3 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -4 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -5 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -5 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -7 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -8 is selected from by following compounds
One or more of compounds in the group of composition：
Another aspect of the present invention provides a kind of liquid-crystal composition with negative dielectric anisotropic, also comprising this field skill
The known one or more additives with described in document of art personnel.
Refer to the stabilizer that can be for example added in mixture according to the present invention as follows.
Preferably, the stabilizer is selected from stabilizer as follows.
In embodiments of the invention, preferably described stabilizer accounts for the 0-5% of the liquid-crystal composition total weight；It is more excellent
Ground, the stabilizer account for the 0-1% of the liquid-crystal composition total weight；As particularly preferred scheme, the stabilizer accounts for described
The 0.01-0.1% of liquid-crystal composition total weight.
Another aspect of the invention, also provides a kind of liquid crystal display, and the liquid crystal display includes provided by the present invention
Liquid-crystal composition.
By using above-mentioned technical proposal, compared with prior art, the technique effect acquired by the present invention has：
Negative liquid crystal composition provided by the present invention have appropriate high dielectric anisotropy, appropriate high clearing point,
It is appropriate high optical anisotropy, good low temperature intersolubility, higher voltage retention, good high-temperature stability, good
It is imparted can and the characteristics such as higher transmitance liquid-crystal composition.The display of liquid-crystal composition comprising the present invention
Part has higher brightness and good uvioresistant performance, particularly can be adapted for that ambient is relatively strong and ultraviolet light
In stronger environment.
Unless otherwise specified, the ratio described in the present invention is weight ratio, and all temperature are degree celsius temperature, electricity
The test temperature for pressing conservation rate (VHR) is 60 DEG C.
Specific embodiment
Illustrate the present invention below with reference to specific embodiment.It should be noted that the following examples are the present invention
Example, be only used for illustrating the present invention, and be not limited to the present invention.In the case of without departing from present subject matter or range,
It can carry out other combinations and the various improvement in present inventive concept.
Liquid crystal display is that negative liquid crystal shows equipment, d=4 μm of box thickness, by inclined used by following embodiment
Shake device (polaroid), electrode base board etc. part form.The display equipment is normal white mode, i.e., no voltage difference is applied to row and column
When between electrode, observer observes the pixel color of white.Polarizer axes up and down on substrate are 90 degrees to each other angle.In two bases
Space between piece is full of optical liquid crystal material.
For ease of expressing, in following embodiment, the unit structure of liquid-crystal composition is represented with the code listed by table 1：
The group structure code of 1 liquid-crystal compounds of table
By taking the compound of following structural formula as an example：
The structural formula is represented such as the code listed by table 2, then can be expressed as：2PWP3,2 in code represent that left ends are-C2H5,
3 represent that right end is-C3H7；P in code represents 1,4- cyclohexylidenes；W represents bis- fluoro- 1,4- phenylenes of 2,3-.
In following embodiment test event to write a Chinese character in simplified form code name as follows：
Wherein, optical anisotropy uses abbe's refractometer under sodium lamp (589nm) light source, 25 DEG C of tests obtain；It is situated between
Electrical testing box is VA types, and box is 6 μm thick.
Δ ε=ε | |-ε ⊥, wherein, ε | | it is the dielectric constant for being parallel to molecular axis, ε ⊥ are the dielectric perpendicular to molecular axis
Constant, test condition：25 DEG C, 1KHz, testing cassete be VA types, box is 6 μm thick.
The test condition of voltage retention：Using TN type testing cassetes, box is 9 μm thick
The transmitance at 25 DEG C of light modulation device is tested using DMS 505, the light modulation device box is 6 μm thick.
Used each ingredient below in an example can be synthesized or passed through by well known method
Commercial sources obtain.These synthetic technologys are conventional, and acquired each liquid-crystal compounds meets electrical type compound mark after tested
It is accurate.
According to the proportioning of liquid-crystal composition each as defined in following embodiment, liquid-crystal composition is prepared.The liquid-crystal composition
Preparation be to be carried out according to the conventional method of this field, such as take heating, ultrasonic wave, suspend mode mixed according to regulation ratio
It closes and is made.Reference examples 1 (CN104927876A embodiments 4)
The liquid-crystal composition of reference examples 1 is configured to by each compound and weight percent listed in table 2, is filled in liquid
It is tested for the property between crystal display two substrates, test data is as shown in the table：
2 liquid crystal combination composition formula of table and its test performance
Embodiment 1
The liquid-crystal composition of embodiment 1 is configured to by each compound and weight percent listed in table 3, is filled in liquid
It is tested for the property between crystal display two substrates, test data is as shown in the table：
3 liquid crystal combination composition formula of table and its test performance
Comparative example 1 and comparative example 1 are it can be found that negative liquid crystal composition of the present invention has penetrating for bigger
Rate and preferably anti-UV stability.
Comparative example 2 (TW201534699A embodiments 2)
The liquid-crystal composition of comparative example 2 is configured to by each compound and weight percent listed in table 4, is filled in liquid
It is tested for the property between crystal display two substrates, test data is as shown in the table：
4 liquid crystal combination composition formula of table and its test performance
Embodiment 2
The liquid-crystal composition of embodiment 3 is configured to by each compound and weight percent listed in table 5, is filled in liquid
It is tested for the property between crystal display two substrates, test data is as shown in the table：
5 liquid crystal combination composition formula of table and its test performance
Embodiment 3
The liquid-crystal composition of embodiment 3 is configured to by each compound and weight percent listed in table 6, is filled in liquid
It is tested for the property between crystal display two substrates, test data is as shown in the table：
6 liquid crystal combination composition formula of table and its test performance
Embodiment 4
The liquid-crystal composition of embodiment 4 is configured to by each compound and weight percent listed in table 7, is filled in liquid
It is tested for the property between crystal display two substrates, test data is as shown in the table：
7 liquid crystal combination composition formula of table and its test performance
Comparative example 2, embodiment 3, embodiment 4 and comparative example 2 are it can be found that negative liquid crystal of the present invention combines
Object has the penetrance of bigger and better anti-UV stability.
The negative liquid crystal composition that can be seen that the present invention from more than comparative example and embodiment is each with appropriate high dielectric
Anisotropy absolute value, appropriate high optical anisotropy, appropriate high clearing point, higher penetrance, good anti-UV stablize
Property so that the display device comprising the negative liquid crystal composition has the characteristic of higher display brightness and good anti-
UV stability can be adapted for ambient compared in the strong and stronger environment of ultraviolet light.
The technical concepts and features of embodiment of above only to illustrate the invention, its object is to allow be familiar with technique
People understands the content of present invention and is implemented, and it is not intended to limit the scope of the present invention, all real according to spirit of the invention
The equivalent change or modification that matter is done should all cover within the scope of the present invention.
Claims (9)
1. a kind of liquid-crystal composition with negative dielectric anisotropic, which is characterized in that the liquid-crystal composition includes：
Account for the negative liquid crystal composition total weight 20-65% one or more of general formulas I -1 and or I -2 compound
Account for the compound of one or more of general formulas II of the negative liquid crystal composition total weight 17-40%
Account for the compound of one or more of general formula IIIs of the negative liquid crystal composition total weight 14-40%
And
Account for the compound of one or more of general formulae IVs of the negative liquid crystal composition total weight 20-50%
Wherein,
R1、R2、R3、R5、R7And R8It is identical or different, each independently represent the halogen for the linear chain or branch chain that carbon atom number is 1 to 12
Generation is 2 to 12 halogenated or not by halogenated alkenyl or alkenyloxy group not by halogenated alkyl or alkoxy, carbon atom number；
R4And R6It is identical or different, each independently represent the alkyl for the linear chain or branch chain that carbon atom number is 1 to 12；
It is identical or different, it each independently represents It is describedOne or more of H atom can be replaced by F atom；
A represents 0,1 or 2, wherein, when a is 2,2 ringsIt can be identical or different.
2. the liquid-crystal composition of negative dielectric anisotropic according to claim 1, which is characterized in that the change of the general formula I -1
Close the group that object is selected from following compound composition：
3. the liquid-crystal composition of negative dielectric anisotropic according to claim 1, which is characterized in that the change of the general formula I -2
Close the group that object is selected from following compound composition：
4. the liquid-crystal composition of negative dielectric anisotropic according to claim 1, which is characterized in that the chemical combination of the general formula II
Object is selected from the group of following compound composition：
5. the liquid-crystal composition of negative dielectric anisotropic according to claim 1, which is characterized in that the chemical combination of the general formula III
Object is selected from the group of following compound composition：
6. the liquid-crystal composition of negative dielectric anisotropic according to claim 1, which is characterized in that the chemical combination of the general formulae IV
Object one or more of compounds in the group being made of following compounds：
Wherein,
R7And R8It is identical or different, each independently represent alkoxy that alkyl, carbon atom number that carbon atom number is 1-5 are 1-5,
The alkenyloxy group that the alkenyl or carbon atom number that carbon atom number is 2-5 are 2-5.
7. a kind of liquid-crystal composition with negative dielectric anisotropic includes liquid crystal group according to any one of claims 1 to 6
Close object, which is characterized in that the liquid-crystal composition also includes one or more additives.
8. a kind of liquid crystal display, which is characterized in that including liquid-crystal composition according to any one of claims 1 to 6.
9. a kind of liquid crystal display, which is characterized in that including the liquid-crystal composition described in claim 7.
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