CN115960612A - High-reliability liquid crystal composition - Google Patents
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- CN115960612A CN115960612A CN202111195080.7A CN202111195080A CN115960612A CN 115960612 A CN115960612 A CN 115960612A CN 202111195080 A CN202111195080 A CN 202111195080A CN 115960612 A CN115960612 A CN 115960612A
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Abstract
The invention provides a high-reliability liquid crystal composition and application thereof, wherein the liquid crystal composition comprises a liquid crystal compound with a component I of 10-30% by mass, a liquid crystal compound with a component II of 20-40% by mass, a liquid crystal compound with a component III of 20-50% by mass, a liquid crystal compound with a component IV of 0-5% by mass and a liquid crystal compound with a component V of 10-20% by mass, and the liquid crystal composition has a high voltage holding ratio and a nematic phase in a wide temperature range so as to solve the problems of poor display and the like caused by insufficient reliability and the like in the prior art.
Description
Technical Field
The invention relates to the field of liquid crystal materials, in particular to a liquid crystal composition and application thereof.
Background
In the 60 s of the 20 th century, after RCA company first found that the light transmission mode of liquid crystal can be changed by electric stimulation and then released the liquid crystal display technology by applying the property, the liquid crystal gradually attracted high attention and rapidly developed to various fields. In 1966, after Kevlar fibers were synthesized from aramid liquid crystals by DuPont, the liquid crystal material began to be industrially processed. With the rapid development of decades, liquid crystal materials have been widely used in many fields such as display technology, optical storage devices, and solar cells due to their special properties, and the research range is more extensive in many fields such as chemistry, biology, and information science, and they are one of the most popular and indispensable new materials in the present society.
Liquid crystal displays can be divided into two driving modes, passive matrix (also called passive matrix or simple matrix) and active matrix (also called active matrix). Among them, the active matrix liquid crystal display device forms an image by changing the arrangement of a liquid crystal compound by applying a voltage to change the intensity of light emitted from a backlight, and is more and more favored because of its high resolution, high contrast, low power, thin profile, and lightweight. Active matrix liquid crystal displays can be classified into two types according to active devices: MOS (metal oxide semiconductor) or other diodes on a silicon chip as a substrate; among Thin Film Transistor-TFTs (Thin Film Transistor-TFTs) on a glass plate as a substrate, the most rapidly developed Thin Film Transistor-liquid crystal display (TFT-LCD) is currently used in display devices such as mobile phones, computers, liquid crystal televisions and cameras, and is now the mainstream product in the liquid crystal market.
The lcd tv gradually replaces the conventional CRT display technology due to its advantages of low power consumption, thin and portable property, high resolution, etc., and becomes the main tv display technology in the market. In order to obtain better visual experience, the resolution of lcd tv is increasing, and from the previous 2K resolution, 4K resolution is gradually popularized and will be further upgraded to 8K resolution. Wherein, the 2K resolution of 2048 × 1080,4K resolution of 3840 × 2160,8K resolution is 7680 × 4320, that is 15 times of 2K, and the higher resolution means the higher definition of the picture, the more details can be observed, so that the 4K and 8K tvs have higher reliability requirement than the 2K tvs. The liquid crystal material is an important component of liquid crystal display, so that further improvement of the reliability of the liquid crystal display material is important for improving poor display of the liquid crystal display.
Disclosure of Invention
The invention aims to: the main object of the present invention is to provide a negative-type liquid crystal composition having high reliability to improve the problems of poor display and the like caused by insufficient reliability in the prior art.
The technical scheme is as follows: the invention provides a liquid crystal composition, which comprises 10-30% of a liquid crystal compound of a component I, 20-40% of a liquid crystal compound of a component II, 20-50% of a liquid crystal compound of a component III, 0-5% of a liquid crystal compound of a component IV and 10-20% of a liquid crystal compound of a component V in mass fraction;
the component I is selected from a general formula I1, and the general formula I1 is as follows:
in the general formula I1, Y 1 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7; y is 1 ' is selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7;
the component II is selected from at least one of general formulas II1-II2, and the general formulas II1-II2 are as follows:
II1、
II2、/>
in the general formulae II1 to II2, Y 2 Selected from H, C, C1-C7 alkyl, C1-C7 alkoxy, cyclopentyl, or C1-C7 alkylC1-C7 alkoxy-substituted cyclopentyl; y is 2 ' is selected from H, C, alkyl, alkoxy, cyclopentyl or cyclopentyl substituted by alkyl, alkoxy, cyclopentyl or cyclopentyl of C1-C7;
the component III is selected from at least one of general formulas III1 to III3, and the general formulas III1 to III3 are as follows:
III1、
III2、
III3、
in the formulae III1 to III3, Y 3 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy, or cyclopentyl of C1-C7; y is 3 ' is selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7;
the component IV is selected from general formula IV1, and the general formula IV1 is as follows:
in the general formula IV1, Y 4 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7; y is 4 ' is selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7;
the component V is selected from at least one of formulas V1-V2, and the formulas V1-V2 are as follows:
V1、
V2、/>
in the formulae V1-V2, Y 5 Is selected from H, C, alkyl, alkoxy, cyclopentyl or cyclopentyl substituted by C1-C7 alkyl, alkoxy, cyclopentyl or C1-C7; y is 5 ' is selected from H, C, C1-C7 alkyl, C1-C7 alkoxy, cyclopentyl, or cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy.
According to another aspect of the present invention, there is provided a use of the above liquid crystal composition in a liquid crystal display material or a liquid crystal display device.
Has the advantages that: the liquid crystal composition has higher voltage retention ratio and higher clearing point, and can solve the problems of poor display and the like caused by insufficient reliability and the like in the prior art.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the present application as claimed.
In order to solve the above problems, in an exemplary embodiment of the present invention, there is provided a liquid crystal composition comprising 10 to 30% by mass of a liquid crystal compound of component I, 20 to 40% by mass of a liquid crystal compound of component II, 20 to 50% by mass of a liquid crystal compound of component III, 0 to 5% by mass of a liquid crystal compound of component IV, and 10 to 20% by mass of a liquid crystal compound of component V;
the component I is selected from a general formula I1, and the general formula I1 is as follows:
in the general formula I1, Y 1 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7; y is 1 ' is selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7;
the component II is selected from at least one of general formulas II1-II2, and the general formulas II1-II2 are as follows:
II1、
II2、/>
in the general formulae II1-II2, Y 2 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7; y is 2 ' is selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7;
the component III is selected from at least one of general formulas III1 to III3, and the general formulas III1 to III3 are as follows:
III1、
III2、
III3、
in the formulae III1 to III3, Y 3 Selected from H, C, alkyl, alkoxy, cyclopentyl or cyclopentyl substituted by alkyl, alkoxy, or cyclopentyl of C1-C7; y is 3 ' is selected from H, C, C1-C7 alkyl, C1-C7 alkoxy, cyclopentyl, or substituted by C1-C7 alkyl, C1-C7Alkoxy-substituted cyclopentyl;
the component IV is selected from general formula IV1, and the general formula IV1 is as follows:
in the general formula IV1, Y 4 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7; y is 4 ' is selected from H, C, alkyl, alkoxy, cyclopentyl or cyclopentyl substituted by alkyl, alkoxy, cyclopentyl or cyclopentyl of C1-C7;
the component V is selected from at least one of formulas V1-V2, and the formulas V1-V2 are as follows:
V1、
V2、/>
in the formulae V1-V2, Y 5 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7; y is 5 ' is selected from H, C, C1-C7 alkyl, C1-C7 alkoxy, cyclopentyl, or cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy.
The liquid crystal composition can further comprise 0-15% of component VI by mass, wherein the component VI is selected from general formula VI1, and the formula VI1 is as follows:
in the formula VI1, Y 6 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7; y is 6 ' is selected from H, C, C1-C7 alkyl, C1-C7 alkoxy, cyclopentyl, or C1-C7 alkylAlkyl of (3), C1-C7 alkoxy-substituted cyclopentyl.
The liquid crystal compound with the structure shown in the component I is a white solid or transparent liquid in a pure state, is a bicyclic negative dielectric liquid crystal compound containing a cyclohexyl lateral difluorobenzene ring structure, has low rotational viscosity and melting point, and is driven according to a voltage driving response time formula
It is known that on And rotational viscosity gamma 1 Value proportional, rotational viscosity γ 1 The lower the value, the lower the response time, the faster the response speed; while a lower melting point is advantageous for increasing the solubility of the liquid crystal compound and for lowering the lower use temperature. The liquid crystal compound with the structure shown in the component II is white in a pure state, is a tricyclic negative dielectric liquid crystal compound containing a cyclohexyl and lateral difluorobenzene ring structure, has higher clearing point and dielectric constant, and the higher clearing point is beneficial to increasing the use upper limit temperature of liquid crystal so as to increase the temperature width; the higher dielectric constant is beneficial to reducing the driving voltage, thereby reducing the energy consumption. The liquid crystal compound with the structure shown in the component III is a white solid or a transparent colloidal solid in a pure state, is a bicyclic neutral liquid crystal compound without fluorine groups, has a lower melting point, is used for increasing the solubility of the liquid crystal compound and reducing the lower limit use temperature, and can be selected from the compounds of the component III with different ring structures according to the requirements of different optical anisotropy. The liquid crystal compound with the structure shown in the component IV is a white solid or transparent liquid in a pure state, is a bicyclic negative dielectric liquid crystal compound containing a lateral difluorobiphenyl ring structure, has lower rotational viscosity and melting point, has higher optical anisotropy value compared with the component I, and can be matched with the component I to adjust the optical anisotropy of the system. The liquid crystal compound with the structure shown by the component V is a white solid in a pure state, is a tricyclic neutral liquid crystal compound containing a dicyclohexylbenzene or cyclohexyl biphenyl structure, has a high clearing point, and is beneficial to increasing the use upper limit temperature of liquid crystal so as to increase the temperature width. A liquid crystal compound having a structure represented by component VIThe liquid crystal is a white solid in a pure state, is a tricyclic negative dielectric liquid crystal compound containing a terphenyl structure, has a high optical anisotropy value, and is beneficial to adjusting the optical anisotropy of a system. The end groups of the compounds shown in the components I-IV are all H, saturated alkyl or saturated cycloalkyl, and do not contain unsaturated alkenyl and other structures, so that the stability of the liquid crystal composition is improved, and the reliability of the system is further improved.
The combination of the polar part consisting of the component I, the component II and/or the component IV and the non-polar part consisting of the compounds of the component III and the component V is easy to adjust a system to enable the system to have higher voltage holding ratio, and simultaneously can obtain higher clearing point, proper dielectric constant and proper optical anisotropy value.
Furthermore, it will be clear to the skilled person that the above alkyl groups include not only straight chain alkyl groups but also the corresponding branched chain alkyl groups.
In addition to the liquid crystal compounds of the above-mentioned components I to VI, any kind of liquid crystal compounds can be selected according to the purpose to constitute the liquid crystal composition together with the liquid crystal composition of the present invention, and other additives in the art can be added according to the need. For example, polymerizable compounds, optically active components and/or stabilizers may be added in a mass content of 0 to 20%.
The above polymerizable compound composition was as follows:
wherein, the first and the second end of the pipe are connected with each other,
—T 1 and-T 2 Each independently represent
Or an epoxy group;
—Q 1 -and-Q 2 -each independently represents a single bond or an alkyl group having 1 to 8 carbon atoms;
—P 1 -and-P 2 Each independently of the other<xnotran> , — O —, — CO —, — COO — — OCO —; </xnotran>
k is 0, 1 or 2;
when k is 1, — Z 1 -represents a single bond, -O-, -CO-, -COO-, -OCO-, -CH 2 O—、 —OCH 2 —、—C 2 H 4 —、—CF 2 O—、—OCF 2 —、-C≡C-、—CH＝CH—、
When k is 2, -Z 1 Two occurrences in the component, -Z 1 -represents, independently for each occurrence, a single bond, -O, -CO, -COO, -OCO, -CH 2 O—、—OCH 2 —、—C 2 H 4 —、—CF 2 O—、 —OCF 2 —、-C≡C-、—CH＝CH—、
When the number k is equal to 1, the number k is,
represents->
wherein-CH on cyclohexyl 2 May be substituted by O, or represents
Wherein = CH-on the phenyl ring may be substituted by N, H on the phenyl ring may be substituted by F, or represents ^ H>
When k is 2, two are included in the composition
I.e. based on>
Appears twice in a panel and/or on a panel>
Are each independently at each occurrence +>
wherein-CH on cyclohexyl 2 Can be replaced by O or is->
Wherein = CH-on the phenyl ring may be substituted by N, H on the phenyl ring may be substituted by F, or ^ H>
The above optically active component is preferably:
wherein R is 2 ' is a halogenated or unsubstituted alkyl, alkoxy or alkenyl group having 1 to 7 carbon atoms.
The above-mentioned stabilizers are preferably one or more of the compounds having the components VII1 to VII 5:
VII1、
VII2、/>
VII3、/>
VII4、
VII5、/>
wherein R is 2 Is an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, a halogenated alkyl group having 1 to 7 carbon atoms, a halogenated alkoxy group having 1 to 7 carbon atoms or a halogenated alkenyl group having 2 to 7 carbon atoms; the alkyl, the alkoxy and the alkenyl are linear or branched alkyl, alkoxy and alkenyl;
The content of the liquid crystal compound in the liquid crystal composition can be adjusted according to the performance requirements of the liquid crystal material, and in a preferred embodiment of the invention, the mass fraction of the liquid crystal compound of the component I in the liquid crystal composition is 15-30%, the mass fraction of the liquid crystal compound of the component II in the liquid crystal composition is 20-30%, the mass fraction of the liquid crystal compound of the component III in the liquid crystal composition is 20-40%, the mass fraction of the liquid crystal compound of the component IV in the liquid crystal composition is 0-5%, and the mass fraction of the liquid crystal compound of the component V in the liquid crystal composition is 10-20%.
The remaining ingredients may be added in accordance with the teachings of the present invention as set forth above. In general, the sum of the percentage contents of the components is 100%.
In yet another exemplary embodiment of the present application, there is provided a use of the above liquid crystal composition in a liquid crystal display device. When the liquid crystal composition is applied to the preparation of liquid crystal display materials or liquid crystal display equipment, the performance of the liquid crystal display materials or the liquid crystal display equipment can be obviously improved. The liquid crystal composition is preferably applied in a Vertical Alignment (VA), polymer Stabilized Vertical Alignment (PSVA), or Fringe Field Switching (FFS) type liquid crystal display mode.
The advantageous effects of the present invention will be further described below with reference to examples and comparative examples.
The following examples are given for the purpose of illustrating the invention and not for the purpose of limiting the same, the percentages referred to in the examples being percentages by mass and temperatures being indicated in degrees Celsius. The measured physicochemical parameters are expressed as follows: t is a unit of NI Indicating a clearing point; Δ n denotes optical anisotropy (Δ n = n) e -n o 589nm, measurement temperature 25 ℃); Δ ε represents the dielectric anisotropy (Δ ε = ε) || -ε ⊥ Measurement temperature 25 ℃); k is a radical of 33 The bending elastic coefficient (measurement temperature 25 ℃); gamma ray 1 Represents rotational viscosity (measurement temperature 25 ℃); VHR denotes a voltage holding ratio. And measuring T by DSC NI (ii) a Measuring delta n by using an abbe refractometer; measuring delta epsilon and k by adopting comprehensive physical property tester 33 、γ 1 And a VHR.
In various embodiments of the present invention, the liquid crystal molecular backbone is named: cyclohexyl radical
Denoted by the letter C; benzene ring
Denoted by the letter P; laterally difluorobenzene->
Denoted by W; tetrahydropyran->
Represented by J;
the corresponding code for the specific group structure is shown in table 1:
TABLE 1
The individual compound branches are converted to chemical formulas according to table 2 below, with the left side branch represented by R1 and the right side branch represented by R2. Wherein, the group C n H 2n+1 And C m H 2m+1 Is a straight-chain alkyl radical having n and m carbon atoms, respectively, cp representing a cyclopentyl group
C n H 2n+1 Cp represents a cyclopentyl group having a straight-chain alkyl group of n carbon atoms. The main chain is separated from branches and branch from branch by "-", named after the preceding branch, e.g. in combination with>
Expressed as CW-3-O2,
expressed in PW-3-O2, is present>
Expressed in CPW-3-O2, is>
Expressed in CCP-3-2, based on>
Expressed as PW-3Cp-O2,
denoted by CC-3-2.
TABLE 2
| Code | R1 | R2 |
| n-m | C n H 2n+1 | C m H 2m+1 |
| n-H | C n H 2n+1 | H |
| nO-H | OC n H 2n+1 | H |
| n-Om | C n H 2n+1 | OC m H 2m+1 |
| nO-Om | OC n H 2n+1 | OC m H 2m+1 |
| n-Cp | C n H 2n+1 | Cp |
| n-mCp | C n H 2n+1 | C m H 2m+1 Cp |
| n-F | C n H 2n+1 | F |
| Cp-m | Cp | C m H 2m+1 |
| Cp-H | Cp | H |
| CpO-H | OCp | H |
| Cp-Om | Cp | OC m H 2m+1 |
| CpO-Om | OCp | OC m H 2m+1 |
| Cp-F | Cp | F |
| nCp-m | C n H 2n+1 Cp | C m H 2m+1 |
| nCp-H | C n H 2n+1 Cp | H |
| nCp-Om | C n H 2n+1 Cp | OC m H 2m+1 |
| nCpO-Om | C n H 2n+1 CpO | OC m H 2m+1 |
| nCp-F | C n H 2n+1 Cp | F |
| n-OCp | C n H 2n+1 | OCp |
Example 1
The composition of the liquid crystal composition of example 1 and the measurement parameters are shown in Table 3.
TABLE 3
Example 2
The composition of the liquid crystal composition of example 2 and the measurement parameters are shown in Table 4.
TABLE 4
Example 3
The composition of the liquid crystal composition of example 3 and the measurement parameters are shown in Table 5.
TABLE 5
Example 4
The composition of the liquid crystal composition of example 4 and the measurement parameters are shown in Table 6.
TABLE 6
Example 5
The composition of the liquid crystal composition of example 5 and the measurement parameters are shown in Table 7.
TABLE 7
Example 6
The composition of the liquid crystal composition of example 6 and the measurement parameters are shown in Table 8.
TABLE 8
Example 7
The composition of the liquid crystal composition of example 7 and the measurement parameters are shown in Table 9.
TABLE 9
Example 8
The composition of the liquid crystal composition of example 8 and the measurement parameters are shown in Table 10.
TABLE 10
Wherein, the numbers 1 to 8 are the liquid crystal compounds of the component I, the numbers 8 to 9 are the liquid crystal compounds of the component II, and the numbers 10 to 11 are the liquid crystal compounds of the component III.
Example 9
The composition of the liquid crystal composition of example 9 and the measurement parameters are shown in Table 11.
TABLE 11
Wherein numerals 1 to 8 are liquid crystal compounds of component I, numerals 9 to 10 are liquid crystal compounds of component II, and numerals 11 to 12 are liquid crystal compounds of component III.
Example 10
The composition of the liquid crystal composition of example 10 and the measurement parameters are shown in Table 12.
TABLE 12
Wherein Nos. 1 to 8 are liquid crystal compounds of component I, no. 9 is liquid crystal compound of component II, and Nos. 10 to 11 are liquid crystal compounds of component III.
Comparative example 1
The composition of the liquid crystal composition of comparative example 1 and the measurement parameters are shown in Table 13.
Watch 13
Comparative example 2
The composition of the liquid crystal composition of comparative example 2 and the measurement parameters are shown in Table 14.
TABLE 14
Compared with the examples 1-10, the liquid crystal compound of the component I is not contained in the comparative example 1 and the comparative example 2, and instead, the compound of the component IV is contained in an amount of more than 5%, compared with each example, the clearing point of the liquid crystal composition of the comparative example 1 is lower by at least 1.9 ℃, the voltage holding ratio of the liquid crystal composition is lower by at least 13% compared with the examples 1-10, the voltage holding ratio of each example is more than 90%, and the voltage holding ratio of the comparative example 1 is only 80%; the clearing point of the liquid crystal composition of the comparative example 2 is lower by at least 0.6 ℃, the voltage holding ratio of the liquid crystal composition is lower by at least 14 percent compared with the liquid crystal compositions of the examples 1-10, the voltage holding ratio of each example is more than 90 percent, and the voltage holding ratio of the liquid crystal composition of the comparative example 2 is only 79.1 percent; therefore, the liquid crystal composition has higher clearing point and higher voltage holding ratio, the high clearing point is beneficial to increasing the using temperature range of the liquid crystal composition, and the high voltage holding ratio is beneficial to improving the problems of poor display and the like caused by insufficient reliability of the liquid crystal composition. The above-mentioned measured parameters are related to the physicochemical properties of all liquid crystal compounds constituting the liquid crystal medium, and the liquid crystal composition of the present invention is mainly used for adjusting the liquid crystal parameters of the system.
Although the present invention is not exhaustive of all liquid crystal compositions claimed, it is envisioned that those skilled in the art may obtain other similar materials in a similar manner without inventive effort, based on the above disclosed embodiments, and only with their own professional efforts. And are merely representative of embodiments, given the limited space available.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The liquid crystal composition is characterized by comprising 10-30% of a liquid crystal compound of a component I, 20-40% of a liquid crystal compound of a component II, 20-50% of a liquid crystal compound of a component III, 0-5% of a liquid crystal compound of a component IV and 10-20% of a liquid crystal compound of a component V by mass fraction;
the component I is selected from a general formula I1, and the general formula I1 is as follows:
in the general formula I1, Y 1 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7; y is 1 ' is selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7;
the component II is selected from at least one of general formulas II1-II2, and the general formulas II1-II2 are as follows:
II1、
II2、/>
in the general formulae II1-II2, Y 2 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7; y is 2 ' is selected from H, C, alkyl, alkoxy, cyclopentyl or cyclopentyl substituted by alkyl, alkoxy, cyclopentyl or cyclopentyl of C1-C7;
the component III is selected from at least one of general formulas III1 to III3, and the general formulas III1 to III3 are as follows:
III1、
III2、
III3、
in the formulae III1 to III3, Y 3 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7; y is 3 ' is selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7;
the component IV is selected from a general formula IV1, and the general formula IV1 is as follows:
in the general formula IV1, Y 4 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7; y is 4 ' is selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7;
the component V is selected from at least one of formulas V1-V2, and the formulas V1-V2 are as follows:
V1、
V2、/>
in the formulae V1-V2, Y 5 Is selected from H, C, alkyl, alkoxy, cyclopentyl or cyclopentyl substituted by C1-C7 alkyl, alkoxy, cyclopentyl or C1-C7; y is 5 ' is selected from H, C, an alkyl group of 5363-C7, an alkoxy group of C1-C7, a cyclopentyl group, or a cyclopentyl group substituted by an alkyl group of C1-C7, an alkoxy group of C1-C7.
2. The liquid crystal composition of claim 1, further comprising 0-15% by weight of a component VI selected from formula VI1, wherein formula VI1 is as follows:
in the formula VI1, Y 6 Selected from H, C, alkyl, alkoxy, cyclopentyl and cyclopentyl substituted by alkyl, alkoxy and cyclopentyl of C1-C7; y is 6 ' is selected from H, C, C1-C7 alkyl, C1-C7 alkoxy, cyclopentyl, or cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy.
3. The liquid crystal composition according to claim 1, wherein the liquid crystal composition comprises 15 to 30 mass% of the liquid crystal compound of component I, 20 to 30 mass% of the liquid crystal compound of component II, 20 to 40 mass% of the liquid crystal compound of component III, 0 to 5 mass% of the liquid crystal compound of component IV, and 10 to 20 mass% of the liquid crystal compound of component V.
4. The liquid crystal composition according to any one of claims 1 to 3, further comprising 0 to 20% by mass of a stabilizer selected from one or more compounds represented by general formulas VII1 to VII 5:
VII1、
VII2、/>
VII3、/>
VII4、
VII5、/>
wherein R is 2 Is an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, a halogenated alkyl group having 1 to 7 carbon atoms, a halogenated alkoxy group having 1 to 7 carbon atoms or a halogenated alkenyl group having 2 to 7 carbon atoms; the alkyl, the alkoxy and the alkenyl are linear or branched alkyl, alkoxy and alkenyl;
5. Use of the liquid crystal composition according to any one of claims 1 to 4 in a liquid crystal display material or a liquid crystal display device.
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