CN105567254B

CN105567254B - Liquid-crystal composition and liquid crystal display device

Info

Publication number: CN105567254B
Application number: CN201410558353.3A
Authority: CN
Inventors: 戴慧娟; 韩文明; 丁文全; 李鹏飞; 徐海彬; 贺笛; 刘云云; 姚利芳; 马文阳; 马定福; 张鹤鸣; 施红萍
Original assignee: Jiangsu Hecheng Display Technology Co Ltd
Current assignee: Jiangsu Hecheng Display Technology Co Ltd
Priority date: 2014-10-20
Filing date: 2014-10-20
Publication date: 2018-03-23
Anticipated expiration: 2034-10-20
Also published as: CN105567254A

Abstract

The present invention provides a kind of liquid-crystal composition, comprising：The compound of one or more formulas I is as the first component；The compound of one or more formulas II 1 and/or formula II 2 is as the second component；The compound of one or more general formula IIIs is as third component；The compound of one or more general formulae IVs is as the 4th component；And the compound of one or more formulas V is as BSA.The liquid-crystal composition of the present invention has at least one of the characteristics such as big dielectric anisotropy, big optical anisotropy, high voltage retention and low threshold voltage characteristic, suitable for liquid crystal display device.The present invention also provides the liquid crystal display device for including the liquid-crystal composition.

Description

Liquid-crystal composition and liquid crystal display device

Technical field

It is more particularly to a kind of that there is larger optical anisotropy, larger Jie the present invention relates to a kind of liquid-crystal composition Electrical anisotropy, suitable clearing point and liquid-crystal composition compared with low viscosity and the liquid crystal display for including the liquid-crystal composition Part.

Background technology

For liquid crystal display cells, PC (phase change, phase transformation), TN are divided into according to the display pattern of liquid crystal (twist nematic, twisted-nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electrically conerolled birefringence), OCB (optically compensated It is bend, optical compensation curved), IPS (in-plane switching, coplanar transformation), VA (vertical alignment, hang down Straight orientation) etc. type.PM (passive matrix, passive-matrix) types and AM (active are divided into according to the type of drive of element Matrix, active-matrix) type.PM points are the static state type such as (static) and multichannel (multiplex).AM points are TFT (thin Film transistor, thin film transistor (TFT)), the class such as MIM (metal insulator metal, metal-insulator-metal) Type.TFT type has non-crystalline silicon (amorphous silicon) and polysilicon (polycrystal silicon).The latter according to Manufacturing process is divided into high temperature modification and low form.Liquid crystal display cells according to the type of light source be divided into the reflection-type using natural light, Infiltration type using backlight and the semi-transmission type using two kinds of light sources of natural light and backlight.

The general characteristic of the composition of table 1 and AM elements

NO.	The general characteristic of composition	The general characteristic of AM elements
			1	Nematic wide temperature range	Workable wide temperature range
2	Viscosity is small	Response time is short
			3	Optical anisotropy is appropriate	Contrast is big
4	Positive or negative property dielectric constant anisotropy is big	Critical voltage is low, and consumption electric power is small, and contrast is big
			5	Resistivity is big	Voltage retention is big, and contrast is big
6	To ultraviolet and thermostabilization	Long lifespan

Liquid crystal material is needed with appropriate high dielectric anisotropy, optical anisotropy and good low temperature intersolubility And heat endurance.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 indications of composition is further illustrated according to commercially available liquid crystal display cells.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 Draw, 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 of compound is small.

The optical anisotropy of composition is associated with the contrast of element.In order that the contrast ratio of liquid crystal display cells Maximize, can be by optical anisotropy (Δ n) and the thickness (d) of liquid crystal layer product value (Δ n*d) setting of liquid-crystal composition It is designed for the mode of fixed value.Appropriate product value depends on the species of operating mode.Such as the appropriate value of the element of TN patterns About 0.45 μm.During the situation, for the less element of thickness of liquid crystal layer, the preferably big combination of optical anisotropy Thing.

Liquid crystal display cells containing compared with large optical anisotropic liquid-crystal composition can increase contrast.

The liquid crystal display cells of the big liquid-crystal composition of absolute value containing dielectric anisotropy can reduce basic voltage Value, driving voltage is reduced, and can further reduce consumption of electric power.

The liquid crystal display cells of liquid-crystal composition containing higher voltage retention can reduce liquid crystal display cells and go out The risk of existing image retention, extends liquid crystal display cells service life.

The liquid crystal display cells of liquid-crystal composition containing lower threshold voltage can effectively reduce the power consumption of display, special It is not in running stores, the similar portable type electronic product such as mobile phone, tablet personal computer has longer cruising time.

Single liquid-crystal compounds is generally difficult to play its characteristic, and generally it is mixed with other plurality of liquid crystals compounds and is matched somebody with somebody Composition is made.In available liquid crystal composition, preferably characteristic can be obtained, but the category combinations thing optical anisotropy Not enough greatly, dielectric anisotropy is relatively low, clearing point is relatively low, viscosity is higher, voltage retention is low, to being mixed into larger optics The composition of anisotropy, big dielectric anisotropy and preferable contrast helps less, it is low, easy to directly result in contrast There is image retention, the consumption adverse consequences such as power is big, the liquid-crystal composition as disclosed in CN101796162A, CN1475547A, no With having disadvantages mentioned above in degree.

Therefore, it is necessary to which a kind of liquid-crystal composition, it has big optical anisotropy；Big dielectric anisotropy；Low Threshold voltage；High voltage retention has liquid crystal display cells higher at least one of the characteristic spy such as to display contrast Property.

The content of the invention

There is big dielectric anisotropy, big optical anisotropy, high voltage it is an object of the invention to provide a kind of The liquid-crystal composition of the characteristic such as conservation rate and low threshold voltage.

Other purposes of the present invention are to provide a kind of liquid crystal display cells, and it is included with big dielectric anisotropy, greatly The characteristic such as optical anisotropy, high voltage retention and low threshold voltage composition so that liquid crystal display cells With high-contrast and superior power saving performance.

In order to realize foregoing invention purpose, of the invention provides a kind of liquid-crystal composition, and the liquid-crystal composition includes：

The compound of one or more formulas I is as the first component

The compound of one or more formulas II -1 and/or formula II -2 is as the second component

The compound of one or more general formula IIIs is as third component

The compound of one or more general formulae IVs is as the 4th component

And

The compound of one or more formulas V is as BSA

Wherein,

R₁、R₂、R₄、R₅And R₆It is identical or different, represent carbon number for 1-7 fluoro or not by fluoro independently of one another Alkyl, carbon number are for 1-7 fluoro or not by the alkoxy of fluoro, or carbon number for 2-7 fluoro or not by fluoro Alkenyl；

R₃Fluoro that expression-H, carbon number are 1-7 or the fluoro or not for being not 1-7 by the alkyl of fluoro, carbon number By the alkoxy of fluoro, or carbon number for 2-7 fluoro or not by the alkenyl of fluoro；

Represent OrIt is describedUpper one or more H can be substituted by F；

RingRingRingRingAnd ringPhase It is same or different, represent independently of one anotherOr

RingRingRingAnd ringIt is identical or different, each Independently representOr

L₁And L₂It is identical or different, expression-H or-F independently of one another；

Z₁And Z₂It is identical or different, singly-bound ,-COO- ,-CH are represented independently of one another₂CH₂- or-CH₂O-；

Z₃And Z₄It is identical or different, singly-bound ,-COO- or-CH are represented independently of one another₂O-；

A represents 0,1 or 2, and when a is 2, ringCan be with identical, can also be different；

B, d and e are identical or different, each independent expression 0 or 1；

Wherein, as d=e=0, d=1 and e=0 or d=0 and e=1, ringAnd ringNo It is simultaneously

In certain embodiments of the present invention, the compound of preferably described formula I accounts for the liquid-crystal composition gross weight 1-30%；The compound of the formula II -1 and/or formula II -2 accounts for the 1-30% of the liquid-crystal composition gross weight；It is described The compound of general formula III accounts for the 10-50% of the liquid-crystal composition gross weight；The compound of the general formulae IV accounts for the liquid crystal group The 5-40% of compound gross weight；And the compound of the formula V accounts for the 5-60% of the liquid-crystal composition gross weight.

In certain embodiments of the present invention, the compound of preferably described formula I accounts for the liquid-crystal composition gross weight 5-20%；The compound of the formula II -1 and/or formula II -2 accounts for the 10-25% of the liquid-crystal composition gross weight；Institute The compound for stating general formula III accounts for the 15-45% of the liquid-crystal composition gross weight；The compound of the general formulae IV accounts for the liquid crystal The 10-40% of composition total weight；And the compound of the formula V accounts for the 5-55% of the liquid-crystal composition gross weight.

In some embodiments of the present invention, it is preferable that the compound of the formula I is selected from and is made up of following compounds Group in one or more of compounds：

With And

In some embodiments of the present invention, it is preferable that the compound of the formula II -1 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the formula II -2 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the general formula III is selected from by following compounds group Into group in one or more of compounds：

And

Wherein,

R₃Represent the carbon number fluoro for being 1-7 or be not 1-7 by the alkyl of fluoro, carbon number fluoro or not by fluorine The alkoxy in generation.

In certain embodiments of the present invention, it is preferable that the general formula III -1 accounts for the liquid-crystal composition gross weight 0-25%.

In certain embodiments of the present invention, it is preferable that the general formula III -4 accounts for the liquid-crystal composition gross weight 0-15%.

In certain embodiments of the present invention, it is preferable that the general formula III -5 accounts for the liquid-crystal composition gross weight 0-20%.

In certain embodiments of the present invention, it is preferable that the general formula III -6 accounts for the liquid-crystal composition gross weight 0-15%.

In certain embodiments of the present invention, it is preferable that the general formula III -8 accounts for the liquid-crystal composition gross weight 0-25%.

In certain embodiments of the present invention, it is preferable that the general formula III -9 accounts for the liquid-crystal composition gross weight 0-20%.

In certain embodiments of the present invention, it is preferable that the general formula III -10 accounts for the liquid-crystal composition gross weight 0-15%.

In some embodiments of the present invention, it is preferable that the compound of the general formula III -1 is selected from by following compounds One or more compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the general formula III -2 is selected from by following compounds One or more compounds in the group of composition：

With And

In some embodiments of the present invention, it is preferable that the compound of the general formula III -3 is selected from by following compounds One or more compounds in the group of composition：

With And

In some embodiments of the present invention, it is preferable that the compound of the general formula III -4 is selected from by following compounds One or more compounds in the group of composition：

With And

In some embodiments of the present invention, it is preferable that the compound of the general formula III -5 is selected from by following compounds One or more compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the general formula III -6 is selected from by following compounds One or more compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the general formula III -7 is selected from by following compounds One or more compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the general formula III -8 is selected from by following compounds One or more compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the general formula III -9 is selected from by following compounds One or more compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the general formula III -10 is selected from by following compounds One or more compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the general formula III -11 is selected from by following compounds One or more compounds in the group of composition：

And

In some 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：

And

Wherein,

R₄Represent the carbon number fluoro for being 1-5 or be not 1-5 by the alkyl of fluoro, carbon number fluoro or not by fluorine The alkoxy in generation, or carbon number is for 2-5 fluoro or not by the alkenyl of fluoro.

In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -3 accounts for the liquid-crystal composition The 0-15% of gross weight.

In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -5 accounts for the liquid-crystal composition The 0-15% of gross weight.

In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -6 accounts for the liquid-crystal composition The 0-15% of gross weight.

In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -7 accounts for the liquid-crystal composition The 0-15% of gross weight.

In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -10 accounts for the liquid-crystal composition The 0-25% of gross weight.

In some 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：

And

In some 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：

And

In some 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：

And

In some 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：

And

In some 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：

And

In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -6 is selected from by following compounds One or more of compounds in the group of composition：

And

In some 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：

And

In some 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：

And

In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -9 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -10 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -11 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -12 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -13 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the formula V is selected from by following compounds group Into group in one or more of compounds：

And

Wherein,

R₅And R₆It is identical or different, the alcoxyl that alkyl, carbon number that carbon number is 1-5 are 1-5 is represented independently of one another The alkenyloxy group that the alkenyl or carbon number that base, carbon number are 2-5 are 2-5.

In certain embodiments of the present invention, it is preferable that the compound of the formula V -1 accounts for the liquid-crystal composition The 5-50% of gross weight.

In certain embodiments of the present invention, it is preferable that the compound of the formula V -4 accounts for the liquid-crystal composition The 0-10% of gross weight.

In certain embodiments of the present invention, it is preferable that the compound of the formula V -5 accounts for the liquid-crystal composition The 0-10% of gross weight.

In certain embodiments of the present invention, it is preferable that the compound of the formula V -7 accounts for the liquid-crystal composition The 0-15% of gross weight.

In some embodiments of the present invention, it is preferable that the compound of the formula V -1 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the formula V -2 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the formula V -3 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the formula V -4 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the formula V -5 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the formula V -6 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the formula V -7 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the formula V -8 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the formula V -9 is selected from by following compounds One or more of compounds in the group of composition：

And

In some embodiments of the present invention, it is preferable that the compound of the formula V -10 is selected from by following compounds One or more of compounds in the group of composition：

With And

Another aspect of the present invention provides a kind of liquid crystal display device, and the liquid crystal display device includes the liquid of the present invention Crystal composite.

The present invention passes through the comparison with compareing, it is determined that including above-mentioned liquid by being combined experiment to above-claimed cpd The liquid-crystal composition of crystallization compound, have big dielectric anisotropy, big optical anisotropy, high voltage retention and Low threshold voltage, liquid-crystal composition of the present invention is suitable for liquid crystal display device so that liquid crystal display cells have The characteristic such as superior power saving performance and high contrast.

In the present invention unless otherwise specified, described ratio is weight ratio, and all temperature are degree celsius temperature, institute The box thickness that the test for the response time data stated is selected is 7 μm.

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 scope, Other combinations and the various improvement in present inventive concept can be carried out.

For ease of expressing, in following embodiment, the unit structure of liquid-crystal composition is represented with the code listed by table 2：

The group structure code of the liquid-crystal compounds of table 2

By taking the compound of following structural formula as an example：

The structural formula represents such as the code listed by table 2, then can be expressed as：NCGUF, the n in code represent left end alkyl Carbon number, such as n are " 2 ", that is, it is-C to represent the alkyl₂H₅；C in code represents " cyclohexyl ", and the G in code is represented " the fluoro- Isosorbide-5-Nitrae-phenylenes of 2- ", the U in code represent " 2,5- bis- fluoro- Isosorbide-5-Nitrae-phenylene ", and the F in code represents " fluoro substituents ".

In following examples test event to write a Chinese character in simplified form code name as follows：

Wherein, optical anisotropy using abbe's refractometer under sodium lamp (589nm) light source, 25 DEG C test；Dielectric Testing cassete is TN90 types, and box is thick 7 μm.

VHR (initial) is obtained using TOY06254 type liquid crystal evaluation of physical property system testings；Pulse voltage：5V 6HZ, test Temperature is 60 DEG C, and the measuring unit cycle is 166.7ms；

Vth test conditions：C/1KHZ, JTSB7.0.

It used each composition below in an example, can be synthesized, or be passed through by known method Commercial sources obtain.These synthetic technologys are conventional, and resulting each liquid-crystal compounds meets electrical type compound mark after tested It is accurate.

According to the proportioning of each liquid-crystal composition as defined in following examples, liquid-crystal composition is prepared.The liquid-crystal composition Preparation be to be carried out according to the conventional method of this area, such as take heating, ultrasonic wave, suspend mode mixed according to regulation ratio Close and be made.

Prepare and study the liquid-crystal composition provided in the following example.Be shown below each liquid-crystal composition composition and Its performance parameter test result.

Comparative example 1

The liquid-crystal composition of comparative example 1 is configured to by each compound and percetage by weight listed in table 3, it is filled in liquid Performance test is carried out between crystal display two substrates, test data is as shown in the table：

The liquid crystal combination composition formula of table 3 and its test performance

Comparative example 2

The liquid-crystal composition of comparative example 2 is configured to by each compound and percetage by weight listed in table 4, it is filled in liquid Performance test is carried out between crystal display two substrates, test data is as shown in the table：

The liquid crystal combination composition formula of table 4 and its test performance

Comparative example 3

The liquid-crystal composition of comparative example 3 is configured to by each compound and percetage by weight listed in table 5, it is filled in liquid Performance test is carried out between crystal display two substrates, test data is as shown in the table：

The liquid crystal combination composition formula of table 5 and its test performance

Embodiment 1

The liquid-crystal composition of embodiment 1 is configured to by each compound and percetage by weight listed in table 6, it is filled in liquid Performance test is carried out between crystal display two substrates, test data is as shown in the table：

The liquid crystal combination composition formula of table 6 and its test performance

Embodiment 2

The liquid-crystal composition of embodiment 2 is configured to by each compound and percetage by weight listed in table 7, it is filled in liquid Performance test is carried out between crystal display two substrates, test data is as shown in the table：

The liquid crystal combination composition formula of table 7 and its test performance

Embodiment 3

The liquid-crystal composition of embodiment 3 is configured to by each compound and percetage by weight listed in table 8, it is filled in liquid Performance test is carried out between crystal display two substrates, test data is as shown in the table：

The liquid crystal combination composition formula of table 8 and its test performance

Embodiment 4

The liquid-crystal composition of embodiment 4 is configured to by each compound and percetage by weight listed in table 9, it is filled in liquid Performance test is carried out between crystal display two substrates, test data is as shown in the table：

The liquid crystal combination composition formula of table 9 and its test performance

Embodiment 5

The liquid-crystal composition of embodiment 5 is configured to by each compound and percetage by weight listed in table 10, it is filled in Performance test is carried out between liquid crystal display two substrates, test data is as shown in the table：

The liquid crystal combination composition formula of table 10 and its test performance

Embodiment 6

The liquid-crystal composition of embodiment 6 is configured to by each compound and percetage by weight listed in table 11, it is filled in Performance test is carried out between liquid crystal display two substrates, test data is as shown in the table：

The liquid crystal combination composition formula of table 11 and its test performance

It is provided by the present invention from the test data of above example 1,2,3,4,5 and 6 with reference to comparative example 1,2 and 3 Liquid-crystal composition has larger dielectric anisotropy, larger optical anisotropy and low threshold voltage, suitable for liquid In LCD.And compared with reference examples 1,2 and 3, liquid-crystal composition provided by the present invention has more excellent optics Anisotropy and dielectric anisotropy, and the suitable clearing point of most liquid crystal display requirements is disclosure satisfy that, can Meet the high-contrast of liquid crystal display and the demand of superior power saving performance.

Claims

1. a kind of liquid-crystal composition, comprising：

The compound of one or more formulas I is as the first component

The compound of one or more general formula IIIs is as third component

The compound of one or more general formulae IVs is as the 4th component

And

The compound of one or more formulas V is as BSA

Wherein,

R₁、R₂、R₄、R₅And R₆It is identical or different, represent carbon number for 1-7 fluoro or not by the alkane of fluoro independently of one another Base, carbon number are for 1-7 fluoro or not by the alkoxy of fluoro, or carbon number for 2-7 fluoro or not by the alkene of fluoro Base；

R₃Fluoro that expression-H, carbon number are 1-7 or be not 1-7 by the alkyl of fluoro, carbon number fluoro or not by fluoro Alkoxy, carbon number be 2-7 fluoro or not by the alkenyl of fluoro；

Represent It is describedUpper one or more H can be substituted by F；

RingRingRingRingAnd ringIt is identical or Difference, represent independently of one another

RingRingRingAnd ringIt is identical or different, it is each independent Ground representsOr

B, d and e are identical or different, each independent expression 0 or 1；

Wherein, as d=e=0, d=1 and e=0 or d=0 and e=1, ringAnd ringWhen different For

2. liquid-crystal composition according to claim 1, it is characterised in that the compound of the formula I is selected from by followingization One or more of compounds in the group of compound composition：

3. liquid-crystal composition according to claim 1, it is characterised in that the compound of the formula II -1 is selected from by following Compound group into group in one or more of compounds：

4. liquid-crystal composition according to claim 1, it is characterised in that the compound of the formula II -2 is selected from by following Compound group into group in one or more of compounds：

5. liquid-crystal composition according to claim 1, it is characterised in that the compound of the general formula III is selected from by followingization One or more of compounds in the group of compound composition：

Wherein,

R₃Represent the carbon number fluoro for being 1-7 or be not 1-7 by the alkyl of fluoro, carbon number fluoro or not by fluoro Alkoxy.

6. liquid-crystal composition according to claim 5, it is characterised in that the compound of the general formula III -1 is selected from by following Compound group into group in one or more compounds：

The compound of the general formula III -2 one or more compounds in the group being made up of following compounds：

The compound of the general formula III -3 one or more compounds in the group being made up of following compounds：

The compound of the general formula III -4 one or more compounds in the group being made up of following compounds：

The compound of the general formula III -5 one or more compounds in the group being made up of following compounds：

The compound of the general formula III -6 one or more compounds in the group being made up of following compounds：

The compound of the general formula III -7 one or more compounds in the group being made up of following compounds：

The compound of the general formula III -8 one or more compounds in the group being made up of following compounds：

The compound of the general formula III -9 one or more compounds in the group being made up of following compounds：

The compound of the general formula III -10 one or more compounds in the group being made up of following compounds：

The compound of the general formula III -11 one or more compounds in the group being made up of following compounds：

7. liquid-crystal composition according to claim 1, it is characterised in that the compound of the general formulae IV is selected from by followingization One or more of compounds in the group of compound composition：

Wherein,

R₄Represent the carbon number fluoro for being 1-5 or be not 1-5 by the alkyl of fluoro, carbon number fluoro or not by fluoro Alkoxy, or carbon number is for 2-5 fluoro or not by the alkenyl of fluoro.

8. liquid-crystal composition according to claim 7, it is characterised in that the compound of the general formulae IV -1 is selected from by following Compound group into group in one or more of compounds：

The compound of the general formulae IV -2 one or more of compounds in the group being made up of following compounds：

The compound of the general formulae IV -3 one or more of compounds in the group being made up of following compounds：

The compound of the general formulae IV -4 one or more of compounds in the group being made up of following compounds：

The compound of the general formulae IV -5 one or more of compounds in the group being made up of following compounds：

The compound of the general formulae IV -6 one or more of compounds in the group being made up of following compounds：

The compound of the general formulae IV -7 one or more of compounds in the group being made up of following compounds：

The compound of the general formulae IV -8 one or more of compounds in the group being made up of following compounds：

The compound of the general formulae IV -9 one or more of compounds in the group being made up of following compounds：

The compound of the general formulae IV -10 one or more of compounds in the group being made up of following compounds：

The compound of the general formulae IV -11 one or more of compounds in the group being made up of following compounds：

The compound of the general formulae IV -12 one or more of compounds in the group being made up of following compounds：

The compound of the general formulae IV -13 one or more of compounds in the group being made up of following compounds：

9. liquid-crystal composition according to claim 1, it is characterised in that the compound of the formula V is selected from by followingization One or more of compounds in the group of compound composition：

Wherein,

R₅And R₆It is identical or different, independently of one another represent carbon number be 1-5 alkyl, carbon number be 1-5 alkoxy, The alkenyloxy group that the alkenyl or carbon number that carbon number is 2-5 are 2-5.

10. liquid-crystal composition according to claim 9, it is characterised in that the compound of the formula V -1 is selected under Row compound group into group in one or more of compounds：

The compound of the formula V -2 one or more of compounds in the group being made up of following compounds：

The compound of the formula V -3 one or more of compounds in the group being made up of following compounds：

The compound of the formula V -4 one or more of compounds in the group being made up of following compounds：

The compound of the formula V -5 one or more of compounds in the group being made up of following compounds：

The compound of the formula V -6 one or more of compounds in the group being made up of following compounds：

The compound of the formula V -7 one or more of compounds in the group being made up of following compounds：

The compound of the formula V -8 one or more of compounds in the group being made up of following compounds：

The compound of the formula V -9 one or more of compounds in the group being made up of following compounds：

The compound of the formula V -10 one or more of compounds in the group being made up of following compounds：

11. according to the liquid-crystal composition any one of claim 1-10, it is characterised in that the compound of the formula I Account for the 1-30% of the liquid-crystal composition gross weight；The compound of the formula II -1 and/or formula II -2 accounts for the liquid crystal group The 1-30% of compound gross weight；The compound of the general formula III accounts for the 10-50% of the liquid-crystal composition gross weight；The formula IV compound accounts for the 5-40% of the liquid-crystal composition gross weight；And the compound of the formula V accounts for the liquid crystal combination The 5-60% of thing gross weight.

12. liquid-crystal composition according to claim 11, it is characterised in that the liquid-crystal composition includes：

Account for-the 4-6 of compound V of the liquid-crystal composition gross weight 2%；

Account for-the 1-12 of compound V of the liquid-crystal composition gross weight 35%；

Account for-the 1-15 of compound V of the liquid-crystal composition gross weight 10%；

Account for the chemical compounds I -2 of the liquid-crystal composition gross weight 3%；

Account for the chemical compounds I -3 of the liquid-crystal composition gross weight 5%；

Account for the chemical compounds I -4 of the liquid-crystal composition gross weight 3%；

Account for the compounds Ⅳ -6-2 of the liquid-crystal composition gross weight 4%；

Account for the compounds Ⅳ -6-3 of the liquid-crystal composition gross weight 6%；

Account for-the 5-1 of compound V of the liquid-crystal composition gross weight 3%；

Account for the compound III -9-2 of the liquid-crystal composition gross weight 3%；

Account for the compound III -8-2 of the liquid-crystal composition gross weight 3%；

Account for the compound III -8-3 of the liquid-crystal composition gross weight 5%；

Account for the compound III -8-4 of the liquid-crystal composition gross weight 6%；

Account for the compound ii -1-4 of the liquid-crystal composition gross weight 6%；And

Compound ii-the 2-2 of the liquid-crystal composition gross weight 6% is accounted for,

Or the liquid-crystal composition includes：

Account for the compounds Ⅳ -6-2 of the liquid-crystal composition gross weight 8%；

Account for the chemical compounds I -3 of the liquid-crystal composition gross weight 4%；

Account for the chemical compounds I -4 of the liquid-crystal composition gross weight 4%；

Account for the compounds Ⅳ -5-2 of the liquid-crystal composition gross weight 13%；

Account for the compounds Ⅳ -10-2 of the liquid-crystal composition gross weight 4%；

Account for the compounds Ⅳ -10-1 of the liquid-crystal composition gross weight 3%；

Account for the compounds Ⅳ -10-3 of the liquid-crystal composition gross weight 3%；

Account for the compound III -1-1 of the liquid-crystal composition gross weight 12%；

Account for the compound III -1-2 of the liquid-crystal composition gross weight 12%；

Account for-the 1-12 of compound V of the liquid-crystal composition gross weight 6%；

Account for the compound III -5-2 of the liquid-crystal composition gross weight 20%；

Compound ii-the 2-2 of the liquid-crystal composition gross weight 5% is accounted for,

Or the liquid-crystal composition includes：

Account for the compounds Ⅳ -5-1 of the liquid-crystal composition gross weight 5%；

Account for the compounds Ⅳ -5-2 of the liquid-crystal composition gross weight 6%；

Account for the chemical compounds I -2 of the liquid-crystal composition gross weight 4%；

Account for the chemical compounds I -4 of the liquid-crystal composition gross weight 5%；

Account for the compounds Ⅳ -10-2 of the liquid-crystal composition gross weight 8%；

Account for the compounds Ⅳ -10-1 of the liquid-crystal composition gross weight 6%；

Account for the compounds Ⅳ -10-3 of the liquid-crystal composition gross weight 7.5%；

Account for-the 7-2 of compound V of the liquid-crystal composition gross weight 9%；

Account for-the 1-12 of compound V of the liquid-crystal composition gross weight 17.5%；

Account for the compound ii -1-2 of the liquid-crystal composition gross weight 6%；

Account for the compound ii -1-3 of the liquid-crystal composition gross weight 6%；

Account for the compound III -9-1 of the liquid-crystal composition gross weight 8%；And

Compound III-the 9-2 of the liquid-crystal composition gross weight 8% is accounted for,

Or the liquid-crystal composition includes：

Account for-the 1-12 of compound V of the liquid-crystal composition gross weight 38%；

Account for the compounds Ⅳ -6-3 of the liquid-crystal composition gross weight 4%；

Account for-the 5-2 of compound V of the liquid-crystal composition gross weight 3%；

Account for the compound ii -1-4 of the liquid-crystal composition gross weight 6%；

Account for the compound ii -2-2 of the liquid-crystal composition gross weight 5%；

Account for the compound III -9-2 of the liquid-crystal composition gross weight 2%；

Account for the compound III -10-2 of the liquid-crystal composition gross weight 3%；

Account for the compound III -10-3 of the liquid-crystal composition gross weight 5%；And

Compound III-the 10-4 of the liquid-crystal composition gross weight 5% is accounted for,

Or the liquid-crystal composition includes：

Account for the compounds Ⅳ -7-2 of the liquid-crystal composition gross weight 6%；

Account for the compounds Ⅳ -5-2 of the liquid-crystal composition gross weight 7%；

Account for the compound III -5-2 of the liquid-crystal composition gross weight 14%；

Account for the compound III -6-1 of the liquid-crystal composition gross weight 6%；

Or the liquid-crystal composition includes：

Account for the compounds Ⅳ -6-2 of the liquid-crystal composition gross weight 10%；

Account for the compounds Ⅳ -5-2 of the liquid-crystal composition gross weight 4%；

Account for the chemical compounds I -2 of the liquid-crystal composition gross weight 6%；

Account for the compounds Ⅳ -3-2 of the liquid-crystal composition gross weight 7%；

Account for the compounds Ⅳ -3-4 of the liquid-crystal composition gross weight 7%；

Account for the compounds Ⅳ -10-2 of the liquid-crystal composition gross weight 3%；

Account for-the 7-1 of compound V of the liquid-crystal composition gross weight 2%；

Account for the compound III -1-1 of the liquid-crystal composition gross weight 5%；

Account for the compound III -1-2 of the liquid-crystal composition gross weight 15%；

Account for-the 1-12 of compound V of the liquid-crystal composition gross weight 9%；

Account for the compound III -5-2 of the liquid-crystal composition gross weight 3%；

Account for the compound III -4-1 of the liquid-crystal composition gross weight 4%；

Account for-the 5-2 of compound V of the liquid-crystal composition gross weight 4%；

Account for the compound ii -1-2 of the liquid-crystal composition gross weight 5%；

Account for the compound ii -1-3 of the liquid-crystal composition gross weight 6%；And

Account for the compound ii -1-4 of the liquid-crystal composition gross weight 4%.

13. a kind of liquid crystal display device, the liquid crystal display device includes the liquid crystal described in any one of claim 1 to 12 Composition.