CN112940753B - Liquid crystal composition, liquid crystal display element or liquid crystal display - Google Patents

Liquid crystal composition, liquid crystal display element or liquid crystal display Download PDF

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CN112940753B
CN112940753B CN201911403237.3A CN201911403237A CN112940753B CN 112940753 B CN112940753 B CN 112940753B CN 201911403237 A CN201911403237 A CN 201911403237A CN 112940753 B CN112940753 B CN 112940753B
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liquid crystal
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carbon atoms
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CN112940753A (en
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宰亚孟
张冠超
李倩
王薇
崔静
苏军红
王雪
熊会茹
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Shijiazhuang Chengzhi Yonghua Display Material Co Ltd
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    • C—CHEMISTRY; METALLURGY
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    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
    • C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods

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Abstract

The disclosure relates to a liquid crystal composition, a liquid crystal display element containing the liquid crystal composition and a liquid crystal display, and belongs to the field of liquid crystal display. The book is provided withDisclosed is a liquid crystal composition comprising a compound represented by formula (I) in an amount of 27 to 35% by mass, a compound represented by formula (II) and/or (III) in an amount of 8 to 12% by mass in total, at least two compounds represented by formula (IV) in an amount of 17 to 23% by mass in total, one or more compounds represented by formula (V) and one or more compounds represented by formula (VI), which has a high Voltage Holding Ratio (VHR) and a small rotational viscosity (gamma) 1 )。

Description

Liquid crystal composition, liquid crystal display element or liquid crystal display
Technical Field
The present disclosure relates to a liquid crystal composition, a liquid crystal display element including the same, and a liquid crystal display.
Background
With the development of display technology, flat display devices such as liquid crystal display devices (Liquid Crystal Display, LCD) have been widely used in various consumer electronic products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and have become the mainstream of display devices, because of their advantages such as high image quality, power saving, thin body, and wide application range.
In order to meet the demands of various consumer electronics, liquid crystal materials for display elements and display devices such as IPS (in-plane switching) display mode, FFS (fringe field switching) display mode, VA (vertical alignment) display mode, and the like are required to have (1) a low driving voltage: the liquid crystal material has a suitable negative dielectric anisotropy; (2) fast response: the liquid crystal material has a small rotational viscosity (gamma) 1 ) The method comprises the steps of carrying out a first treatment on the surface of the (3) High reliability: high charge retention rate, high specific resistance, excellent high temperature stability, strict requirements on the stability of irradiation by UV (ultraviolet) light or conventional backlight illumination, and the like; (4) good low-temperature intersolubility: the solubility of the liquid crystal material is relatively good. However, when we are liquidWhen the crystal material reaches the basic characteristics (low driving voltage, fast response) required by the display, the reliability problem is exposed one by one, and especially the stability of UV illumination is poor. Thus, solving the reliability problem of such liquid crystal media has become a tricky issue, in other words, we have also demanded to invent or propose one or more compounds improving the stability of the liquid crystal media to solve the reliability problem of the liquid crystal media. In the process of dynamic display of a liquid crystal display, in order to ensure that the previous display picture is not displayed in the next display picture, the phenomenon of afterimage or tailing occurs in the picture switching process, the liquid crystal display is required to have a fast response speed, and further the rotational viscosity of a liquid crystal material is required to be lower.
Disclosure of Invention
Based on the above problems, a first object of the present invention is to provide a liquid crystal composition having a high Voltage Holding Ratio (VHR) and a relatively lower rotational viscosity (γ) 1 )。
Another object of the present disclosure is to provide a liquid crystal display element having a display mode of IPS/FFS, which includes the liquid crystal composition of the present disclosure, and which has a fast response speed and high reliability.
It is still another object of the present disclosure to provide a liquid crystal display having a display mode of IPS/FFS, which includes the liquid crystal composition of the present disclosure, which has a fast response speed and high reliability.
In order to achieve the above purpose, the present disclosure adopts the following technical scheme:
the present disclosure provides a liquid crystal composition comprising: 27-35% of a compound of formula I, 8-12% of a total mass content of compounds of formula II and/or III, 17-23% of at least two compounds of formula IV, one or more compounds of formula V and one or more compounds of formula VI:
Figure BDA0002347971030000021
wherein, the liquid crystal display device comprises a liquid crystal display device,
R 1 、R 2 、R 3 、R 4 、R 5 each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms, wherein R 1 、R 4 -CH not linked to any one or more of the groups shown 2 Optionally substituted with cyclopentylene, cyclobutylene or cyclopropyl ene.
The technical proposal of the present disclosure has high Voltage Holding Ratio (VHR) and small rotational viscosity (gamma) 1 )。
The present disclosure also provides negative dielectric anisotropy liquid crystal compositions having dielectric anisotropy values between-3.8 and-5.0.
The present disclosure also provides a display element having a display mode of IPS/FFS liquid crystals, which comprises the liquid crystal composition of the present disclosure, the liquid crystal display element being an active matrix addressed display element.
The present disclosure also provides a liquid crystal display having a display mode of IPS/FFS liquid crystals, which comprises the liquid crystal composition of the present disclosure, the liquid crystal display being an active matrix addressed display.
The liquid crystal composition provided by the invention solves the problems of slow response speed and reliability of the current negative IPS/FFS mode liquid crystal composition.
According to the liquid crystal composition provided by the invention, the response time specification is improved by adding the compounds shown in IV and V, so that the liquid crystal composition has a relatively high response speed; the liquid crystal composition has proper dielectric anisotropy value and larger optical anisotropy by adding the compound shown in VI.
Detailed Description
[ liquid Crystal composition ]
The present disclosure provides a liquid crystal composition comprising: 27-35% of a compound of formula I, 8-12% of a total mass content of compounds of formula II and/or III, 17-23% of at least two compounds of formula IV, one or more compounds of formula V and one or more compounds of formula VI:
Figure BDA0002347971030000031
wherein, the liquid crystal display device comprises a liquid crystal display device,
R 1 、R 2 、R 3 、R 4 、R 5 each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms, wherein R 1 、R 4 -CH not linked to any one or more of the groups shown 2 Optionally substituted with cyclopentylene, cyclobutylene or cyclopropyl ene.
The technical proposal of the present disclosure has high Voltage Holding Ratio (VHR) and small rotational viscosity (gamma) 1 )。
Examples of the alkyl group having 1 to 10 carbon atoms include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, hexyl, heptyl, octyl, nonyl, decyl and the like.
Examples of the alkenyl group having 2 to 10 carbon atoms include vinyl, 1-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-hexenyl, 2-hexenyl and 3-hexenyl.
The "fluoro substituent" in the above-mentioned fluoro-substituted alkyl group having 1 to 10 carbon atoms and fluoro-substituted alkenyl group having 2 to 10 carbon atoms may be monofluoro substituent, difluoro substituent, trifluoro substituent or other multi-fluoro substituent, or perfluoro substituent, and the number of fluoro substituents is not particularly limited. Examples of the fluorine-substituted alkyl group having 1 to 10 carbon atoms include, but are not limited to, fluoromethyl group, difluoromethyl group, trifluoromethyl group, 1-fluoroethyl group, 2-fluoroethyl group, 1, 2-difluoroethyl group, 1, 2-trifluoroethyl group, 1, 2-pentafluoroethyl group and the like.
The above-mentioned technical scheme is recommended to be preferred, and the respective monomer parts are further preferred.
In the liquid crystal composition of the present disclosure, preferably, the compound represented by the aforementioned formula iv is selected from the group consisting of compounds represented by the following formulas iv-1 to iv-7:
Figure BDA0002347971030000041
the compound shown in the formula IV has small rotational viscosity while maintaining large negative dielectric anisotropy and high definition bright points.
In the liquid crystal composition of the present disclosure, preferably, the compound represented by the aforementioned formula v is selected from the group consisting of compounds represented by the following formulas v-1 to v-5:
Figure BDA0002347971030000042
Figure BDA0002347971030000051
the aforementioned compound represented by formula V has a small rotational viscosity while maintaining a large negative dielectric anisotropy.
In the liquid crystal composition of the present disclosure, preferably, the compound represented by the aforementioned formula vi is selected from the group consisting of compounds represented by the following formulas vi-1 to vi-5:
Figure BDA0002347971030000052
the aforementioned compound of formula VI has a large optical anisotropy while maintaining a moderate dielectric anisotropy.
The liquid crystal composition of the present disclosure preferably further comprises one or more compounds represented by formula vii:
Figure BDA0002347971030000053
wherein, the liquid crystal display device comprises a liquid crystal display device,
R 6 、R 7 each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a fluorine-substituted alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 3 to 8 carbon atoms, or a fluorine-substituted alkenyloxy group having 3 to 8 carbon atoms, wherein R 6 -CH not linked to any one or more of the groups shown 2- Optionally substituted with cyclopentylene, cyclobutylene, or cyclopropyl ene;
Z 1 represents a single bond or-CH 2 O-；
Figure BDA0002347971030000061
Represents 1, 4-cyclohexylene or 1, 4-phenylene;
Figure BDA0002347971030000062
represents 1, 4-cyclohexylene or 1, 4-cyclohexenylene;
m represents 0 or 1, and when m represents 0, Z 1 Representing a single bond.
The aforementioned compound represented by formula VII has negative dielectric anisotropy, and by including the compound represented by formula VII in the liquid crystal composition of the present disclosure, the driving voltage of the liquid crystal composition can be adjusted.
In the liquid crystal composition of the present disclosure, preferably, the aforementioned compound represented by formula vii is selected from the group consisting of compounds represented by the following formulas vii-1 to vii-5:
Figure BDA0002347971030000063
wherein:
R 61 、R 71 each independently represents carbonAlkyl having 1 to 10 atoms, fluoro-substituted alkyl having 1 to 10 carbon atoms, alkoxy having 1 to 10 carbon atoms, fluoro-substituted alkoxy having 1 to 10 carbon atoms, alkenyl having 2 to 10 carbon atoms, fluoro-substituted alkenyl having 2 to 10 carbon atoms, alkenyloxy having 3 to 8 carbon atoms or fluoro-substituted alkenyloxy having 3 to 8 carbon atoms, wherein R 61 Any one or more of the unconnected-CH's in the indicated group 2 Optionally substituted with cyclopentylene, cyclobutylene or cyclopropyl ene.
The liquid crystal composition of the present disclosure preferably further comprises one or more compounds of formula VIII in addition to the compounds of formula I, formula II:
Figure BDA0002347971030000071
wherein, the liquid crystal display device comprises a liquid crystal display device,
wherein R is 8 、R 9 Each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms;
Figure BDA0002347971030000072
each independently represents 1, 4-cyclohexylene, 1, 4-cyclohexenylene or 1, 4-phenylene.
By including the compound represented by formula VIII in the liquid crystal composition of the present disclosure, the intersolubility of the liquid crystal composition can be improved, and the rotational viscosity can be reduced, thereby improving the response speed of the liquid crystal composition of the present disclosure.
The liquid crystal composition of the present disclosure preferably, the aforementioned compounds of formula VIII other than the compounds of formulas I, II are selected from the group consisting of compounds of formulas VIII-1 to VIII-3:
Figure BDA0002347971030000073
wherein R is 8 、R 9 Each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms.
The liquid crystal composition of the present disclosure, preferably, the aforementioned liquid crystal composition further comprises one or more compounds represented by formula ix in addition to the compound represented by formula iii:
Figure BDA0002347971030000074
wherein R is 10 、R 11 Each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms;
Figure BDA0002347971030000075
each independently represents 1, 4-cyclohexylene, 1, 4-cyclohexenylene or 1, 4-phenylene.
By containing the compound represented by formula ix in the liquid crystal composition of the present disclosure, the optical anisotropy of the liquid crystal composition can be increased and the clearing point of the liquid crystal composition can be improved.
In the liquid crystal composition of the present disclosure, preferably, the aforementioned compound represented by IX other than the compound represented by formula III is selected from the group consisting of compounds represented by formulas IX-1 to IX-3:
Figure BDA0002347971030000081
wherein R is 10 、R 11 Each independently represents carbonAn alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms.
The liquid crystal composition of the present disclosure preferably further comprises one or more compounds of formula x:
Figure BDA0002347971030000082
wherein, the liquid crystal display device comprises a liquid crystal display device,
R 12 represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms or a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, any one or more of which are not linked to one another, -CH 2 -optionally substituted with cyclopentylene, cyclobutylene or cyclopropyl ene;
R 13 represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms or a fluorine-substituted alkoxy group having 1 to 10 carbon atoms;
x represents O or S.
By including the aforementioned compound represented by formula X in the liquid crystal composition of the present disclosure, the liquid crystal composition can have a large negative dielectric anisotropy, which is advantageous in reducing the driving voltage of the device.
The liquid crystal composition of the present disclosure, preferably, the aforementioned compound represented by formula x is selected from the group consisting of compounds represented by the following formulas x-1 to x-12:
Figure BDA0002347971030000083
Figure BDA0002347971030000091
wherein R is 121 、R 131 Represents an alkyl group having 1 to 10 carbon atoms.
In the liquid crystal composition of the present disclosure, optionally, various functional dopants may be added, and in the case of containing the dopants, the content of the dopants is preferably 0.01 to 1.5% by mass in the liquid crystal composition, and examples of the dopants include antioxidants, ultraviolet absorbers, and chiral agents.
The antioxidant may be exemplified by an antioxidant such as,
Figure BDA0002347971030000101
t represents an integer of 1 to 10;
the chiral agent may be exemplified by a chiral compound,
Figure BDA0002347971030000102
r represents an alkyl group having 1 to 10 carbon atoms;
the light stabilizer may be exemplified by those having,
Figure BDA0002347971030000103
Z 1 represents an alkylene group having 1 to 20 carbon atoms, any one or more hydrogens in the alkylene group being optionally substituted with halogen, any one or more-CH' s 2 -optionally substituted with-O-;
the ultraviolet ray absorber may be exemplified by,
Figure BDA0002347971030000104
r represents an alkyl group having 1 to 10 carbon atoms.
[ liquid Crystal display element or liquid Crystal display ]
The present disclosure also relates to a liquid crystal display element or a liquid crystal display comprising any of the above liquid crystal compositions; the display element or display is an active matrix display element or display.
Optionally, the active matrix display element or display is an IPS-TFT/FFS-TFT liquid crystal display element or display.
The liquid crystal display element or the liquid crystal display containing the compound or the liquid crystal composition has high response speed.
Examples
In order to more clearly illustrate the present disclosure, the present disclosure is further described below in connection with preferred embodiments. It is to be understood by persons of ordinary skill in the art that the following detailed description is illustrative and not restrictive, and should not be taken as limiting the scope of the present disclosure.
In the specification, unless specified otherwise, the percentages refer to mass percentages, the temperature is in degrees centigrade (DEG C), and the specific meanings and testing conditions of other symbols are as follows:
cp represents a liquid crystal clearing point (DEG C), and is tested by DSC quantification;
Δn represents optical anisotropy, n o Refractive index of ordinary ray, n e The refractive index of the extraordinary ray is 25+/-2 ℃ and is measured by an Abbe refractometer at 589 nm;
delta epsilon represents dielectric anisotropy, delta epsilon=epsilon ∥ -ε ⊥ Wherein ε is ∥ For dielectric constant parallel to the molecular axis ε ⊥ For the dielectric constant perpendicular to the molecular axis, the test conditions are 25+/-0.5 ℃ and 20-micrometer vertical boxes, INSTEC, ALCT-IR1 test;
γ 1 the rotational viscosity (mPas) was shown under the conditions of 25+ -0.5deg.C, 20 μm vertical cell, INSTEC: ALCT-IR1 test;
K 11 to give a torsional spring constant, K 33 For the splay elastic constant, the test conditions were: 25 ℃, INSTEC, ALCT-IR1, 20 micron vertical box;
VHR represents a voltage holding ratio (%), and the test conditions were 20±2 ℃, voltage ±5V, pulse width 10ms, and voltage holding time 16.7ms. The test equipment is a TOYO Model6254 liquid crystal performance comprehensive tester;
the preparation method of the liquid crystal composition comprises the following steps: and weighing all the liquid crystal monomers according to a certain proportion, putting the liquid crystal monomers into a stainless steel beaker, putting the stainless steel beaker with all the liquid crystal monomers on a magnetic stirring instrument, heating and melting, adding a magnetic rotor into the stainless steel beaker after most of the liquid crystal monomers in the stainless steel beaker are melted, uniformly stirring the mixture, and cooling to room temperature to obtain the liquid crystal composition.
The liquid crystal monomer structure of the embodiment of the disclosure is expressed by codes, and the codes of the liquid crystal ring structure, the end group and the connecting group are expressed by the following table 1 and table 2.
Table 1 corresponding codes of the ring structure
Figure BDA0002347971030000121
TABLE 2 correspondence code of end groups to linking groups
Figure BDA0002347971030000122
/>
Figure BDA0002347971030000131
Examples:
Figure BDA0002347971030000132
the code is CPY-2-O2;
Figure BDA0002347971030000133
the code is CCY-3-O2;
Figure BDA0002347971030000134
the code is COY-3-O2;
Figure BDA0002347971030000135
the code is CCOY-3-O2;
Figure BDA0002347971030000136
the code is Sb-CpO-O4;
Figure BDA0002347971030000137
the code is Sc-CpO-O4.
Example 1
The formulation and corresponding properties of the liquid crystal composition are shown in Table 3 below.
TABLE 3 formulation of example 1 liquid crystal composition and corresponding Properties
Figure BDA0002347971030000138
/>
Figure BDA0002347971030000141
Example 2
The formulation and corresponding properties of the liquid crystal composition are shown in Table 4 below.
TABLE 4 formulation and corresponding Properties of example 2 liquid Crystal composition
Figure BDA0002347971030000142
/>
Figure BDA0002347971030000151
Comparative example 1
The formulation and corresponding properties of the liquid crystal composition are shown in Table 5 below.
TABLE 5 formulation and corresponding Properties of comparative example 1 liquid Crystal composition
Figure BDA0002347971030000152
CPY-3-O2 and CPY-2-O2 in example 2 were replaced with CCOY-3-O2 and CCOY-2-O2, and the remaining components were subjected to fine adjustment so as to maintain the same dielectric anisotropy, proper optical anisotropy and moderate clearing point as comparative example 1. The liquid crystal composition of example 2 of the present disclosure had a rotational viscosity γ as compared with comparative example 1 1 Smaller, gamma 1 /K 11 Smaller, faster response, and can be used to develop fast response liquid crystal displays.
Example 3
The formulation and corresponding properties of the liquid crystal composition are shown in Table 6 below.
TABLE 6 formulation of example 3 liquid crystal composition and corresponding Properties
Figure BDA0002347971030000161
Example 4
The formulation and corresponding properties of the liquid crystal composition are shown in Table 7 below.
TABLE 7 formulation and corresponding Properties of example 4 liquid Crystal composition
Figure BDA0002347971030000162
/>
Figure BDA0002347971030000171
Example 5
The formulation and corresponding properties of the liquid crystal composition are shown in Table 8 below.
TABLE 8 formulation of example 5 liquid crystal composition and corresponding Properties
Figure BDA0002347971030000172
/>
Figure BDA0002347971030000181
Example 6
The formulation and corresponding properties of the liquid crystal composition are shown in Table 9 below.
TABLE 9 formulation of liquid crystal composition of example 6 and corresponding Properties
Figure BDA0002347971030000182
/>
Figure BDA0002347971030000191
Example 7
The formulation and corresponding properties of the liquid crystal composition are shown in Table 10 below.
TABLE 10 formulation of liquid crystal composition of example 7 and corresponding Properties
Figure BDA0002347971030000192
Example 8
The formulation and corresponding properties of the liquid crystal composition are shown in Table 11 below.
TABLE 11 formulation and corresponding Properties of example 8 liquid Crystal composition
Figure BDA0002347971030000193
/>
Figure BDA0002347971030000201
Example 9
The formulation and corresponding properties of the liquid crystal composition are shown in Table 12 below.
Table 12 formulation and corresponding Properties of example 9 liquid Crystal composition
Figure BDA0002347971030000202
/>
Figure BDA0002347971030000211
Comparative example 2
The formulation and corresponding properties of the liquid crystal composition are shown in Table 13 below.
TABLE 13 formulation and corresponding Properties of comparative example 2 liquid Crystal composition
Figure BDA0002347971030000212
/>
Figure BDA0002347971030000221
The COY-3-O2 in example 9 was replaced with CCY-4-O2, and the remaining components were finely tuned to maintain the same dielectric anisotropy, proper optical anisotropy and moderate clearing point, as comparative example 2. The liquid crystal composition of example 9 of the present disclosure had a rotational viscosity γ as compared with comparative example 2 1 Smaller, gamma 1 /K 11 Smaller, faster response, and can be used to develop fast response liquid crystal displays.
Reliability test
TABLE 14 reliability data for examples and comparative examples
Sample name Initial VHR (%) VHR after high temperature (%) VHR after UV (%)
Comparative example 1 98.5 96.5 95.5
Comparative example 1 98.7 96.4 96.1
Example 1 99.6 98.6 98.3
Example 2 99.7 98.9 98.5
Example 3 99.5 98.7 98.5
Example 4 99.7 98.6 98.7
Example 5 99.6 98.5 98.6
Example 6 99.7 98.4 98.5
Example 7 99.6 98.6 98.4
Example 8 99.7 98.7 98.6
Example 9 99.6 98.9 98.5
The reliability of the liquid crystal composition is carried out by ultraviolet and high temperature aging tests and VHR tests, and the smaller the VHR data change of the liquid crystal composition before and after the ultraviolet and high temperature tests is, the stronger the ultraviolet and high temperature resistance is. Therefore, the uv and heat resistance was judged by comparing the differences of VHR data before and after the test for each example and comparative example.
Ultraviolet aging test: the liquid crystal composition was irradiated with 5000mJ energy under an ultraviolet lamp having a wavelength of 365 nm.
High temperature aging test: the liquid crystal composition was placed in an oven at 100 ℃ for one hour.
The smaller the change of the VHR data relative to the initial VHR data after the aging test, the stronger the ultraviolet resistance and the high temperature resistance of the liquid crystal composition are, so that the stronger the resistance of the liquid crystal composition to the damage of the external environment in the working process can be judged, and the higher the reliability of the liquid crystal composition is. From the above comparative example 1, comparative example 2 and examples 1 to 9, it can be seen that: the liquid crystal composition provided by the invention is very obvious in improving the UV and high temperature resistance of the liquid crystal material, and has good UV and high temperature resistance.
It should be apparent that the foregoing examples of the present disclosure are merely illustrative of the present disclosure and not limiting of the embodiments of the present disclosure, and that various other changes and modifications may be made by one of ordinary skill in the art based on the foregoing description, and it is not intended to be exhaustive of all embodiments, and all obvious changes and modifications that come within the scope of the present disclosure are intended to be embraced by the technical solution of the present disclosure.

Claims (2)

1. A negative dielectric anisotropic liquid crystal composition for use in a liquid crystal display element or device having a display mode of IPS or FFS, the liquid crystal composition having a dielectric anisotropy value of-3.8, the liquid crystal composition comprising: 29% by mass of a compound of formula I, 7% by mass of a compound of formula II and 5% by mass of a compound of formula III, 10% by mass of a compound of formula IV-2, 9% by mass of a compound of formula IV-4, 13% by mass of a compound of formula V-2, 3% by mass of a compound of formula VI-1, 9.5% by mass of a compound of formula VII-2, 5% by mass of a compound of formula VII-3, 3% by mass of a compound of formula VIII-1 and 6.5% by mass of a compound of formula X-4:
Figure FDA0004157532090000011
Figure FDA0004157532090000021
wherein, the liquid crystal display device comprises a liquid crystal display device,
R 61 an alkyl group having 3 carbon atoms;
R 71 an alkoxy group having 2 carbon atoms;
R 8 an alkyl group having 3 carbon atoms;
R 9 an alkyl group having 5 carbon atoms;
R 131 represents an alkyl group having 4 carbon atoms.
2. A liquid crystal display element or a liquid crystal display comprising the liquid crystal composition of claim 1, wherein the liquid crystal display element or the liquid crystal display is an active matrix addressed display element or display.
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