CN112980463A - Negative liquid crystal medium, liquid crystal display element or liquid crystal display - Google Patents
Negative liquid crystal medium, liquid crystal display element or liquid crystal display Download PDFInfo
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 150
- 239000000203 mixture Substances 0.000 claims abstract description 104
- 150000001875 compounds Chemical class 0.000 claims abstract description 81
- 230000004044 response Effects 0.000 claims abstract description 13
- 125000004432 carbon atom Chemical group C* 0.000 claims description 53
- 125000000217 alkyl group Chemical group 0.000 claims description 30
- 125000003342 alkenyl group Chemical group 0.000 claims description 25
- 125000003545 alkoxy group Chemical group 0.000 claims description 15
- 125000004979 cyclopentylene group Chemical group 0.000 claims description 6
- 125000004980 cyclopropylene group Chemical group 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 2
- 230000003078 antioxidant effect Effects 0.000 claims description 2
- 125000001995 cyclobutyl group Chemical group [H]C1([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 12
- 230000000875 corresponding effect Effects 0.000 description 23
- 238000009472 formulation Methods 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 13
- 239000000178 monomer Substances 0.000 description 8
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- 238000002834 transmittance Methods 0.000 description 6
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- 238000012360 testing method Methods 0.000 description 5
- 239000002019 doping agent Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
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- 210000002858 crystal cell Anatomy 0.000 description 3
- -1 3-pentenyl group Chemical group 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
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- 125000004973 1-butenyl group Chemical group C(=CCC)* 0.000 description 1
- 125000006039 1-hexenyl group Chemical group 0.000 description 1
- 125000006023 1-pentenyl group Chemical group 0.000 description 1
- 125000006017 1-propenyl group Chemical group 0.000 description 1
- UWCWUCKPEYNDNV-LBPRGKRZSA-N 2,6-dimethyl-n-[[(2s)-pyrrolidin-2-yl]methyl]aniline Chemical compound CC1=CC=CC(C)=C1NC[C@H]1NCCC1 UWCWUCKPEYNDNV-LBPRGKRZSA-N 0.000 description 1
- 125000004974 2-butenyl group Chemical group C(C=CC)* 0.000 description 1
- 125000006040 2-hexenyl group Chemical group 0.000 description 1
- 125000006024 2-pentenyl group Chemical group 0.000 description 1
- 125000004975 3-butenyl group Chemical group C(CC=C)* 0.000 description 1
- 125000006041 3-hexenyl group Chemical group 0.000 description 1
- 101100132433 Arabidopsis thaliana VIII-1 gene Proteins 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LXRZVMYMQHNYJB-UNXOBOICSA-N [(1R,2S,4R)-4-[[5-[4-[(1R)-7-chloro-1,2,3,4-tetrahydroisoquinolin-1-yl]-5-methylthiophene-2-carbonyl]pyrimidin-4-yl]amino]-2-hydroxycyclopentyl]methyl sulfamate Chemical compound CC1=C(C=C(S1)C(=O)C1=C(N[C@H]2C[C@H](O)[C@@H](COS(N)(=O)=O)C2)N=CN=C1)[C@@H]1NCCC2=C1C=C(Cl)C=C2 LXRZVMYMQHNYJB-UNXOBOICSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate group Chemical group C(C=C)(=O)[O-] NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 230000009118 appropriate response Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000006612 decyloxy group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
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- 238000002438 flame photometric detection Methods 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000005446 heptyloxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003707 hexyloxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000002510 isobutoxy group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])O* 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000005647 linker group Chemical group 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000006606 n-butoxy group Chemical group 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003506 n-propoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000006611 nonyloxy group Chemical group 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000005447 octyloxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000004115 pentoxy group Chemical group [*]OC([H])([H])C([H])([H])C([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
- G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Geometry (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Substances (AREA)
Abstract
The invention discloses a dielectric negative liquid crystal composition for an IPS (in-plane switching) or FFS (fringe field switching) mode television, which belongs to the technical field of liquid crystal materials and comprises 18-30% by mass of a compound shown in a formula I, 3-12% by mass of a compound shown in a formula II, more than three compounds shown in a formula III, more than two compounds shown in a formula IV, and one or more compounds shown in formulas V-1 to V-4, wherein the compounds are 20-28% by mass of the total content, the more than two compounds shown in the formula IV are 22-28% by mass of the total content, and the total content is 10-25% by mass of the one or more compounds shown in the formulas V-1 to V. The liquid crystal composition has proper rotary viscosity and high elastic constants K and K33/K11The characteristic of large ratio can be used for developing a liquid crystal display with high contrast and quick response.
Description
Technical Field
The invention belongs to the technical field of liquid crystal materials, and particularly relates to a negative liquid crystal composition and a liquid crystal display element or a liquid crystal display containing the same.
Background
The display is a process of converting data information using an electric signal as a propagation medium into visual information using visible light as a propagation medium, and the displayed device is a Man-Machine Interface (Man-Machine Interface) MMI. Flat Panel Display (FPD) FPDs are the most popular type of Display device at present. A Liquid Crystal Display (LCD) is the earliest developed FPD, and is a mainstream product in the current market due to its small size, light weight, low radiation, low power consumption, excellent Display quality, and the like. In terms of the operating principle, the LCD device generates light from a backlight source by using a polarizer, liquid crystal molecules of a liquid crystal cell, and the like, and the light and the shade of the light corresponding to an image to be displayed are generated, so that the color is changed, and the image display recognizable by people is realized. That is, the brightness of the LCD depends on the relative amount of light transmitted through the liquid crystal cell, which is called the transmittance of the liquid crystal cell, the transmittance of the relative amount of light transmitted through the color filter, and the brightness of the backlight.
In the current liquid crystal display market, the competitive display modes mainly include: display modes such as in-plane switching (IPS), fringe-field switching (FFS), and Vertical Alignment (VA). In these display modes, both the in-plane switching IPS and the fringe field switching FFS have a feature of a wide viewing angle. When the positive liquid crystal is used in an IPS/FFS display mode, a fast response can be obtained and good reliability is obtained; when the negative liquid crystal is used in an IPS/FFS display mode, higher transmittance can be obtained, although the negative liquid crystal has the defects of larger viscosity and slow response time.
The introduction of different display modes has led to a significant improvement in the performance of liquid crystal displays LCDs, and the LCDs are more widely used in smart phones, displays, portable tablet computers, televisions, and other different applications. These applications place higher display requirements on liquid crystal displays, such as high contrast, wide viewing angle, fast response and high transmittance.
The liquid crystal television can become a main stream product of the unique leadership in the color television market, mainly because the liquid crystal television is lighter, thinner and thinner than the common television,High resolution, low energy consumption, low radiation, health and environmental protection. The initial liquid crystal television products do not have strict requirements on characteristics such as contrast, resolution, brightness, visual angle and the like, but are lighter and thinner and have wider color range compared with common kinescope televisions, like the current mainstream 2K/4K or even 8K television products, the most critical technical indexes such as response speed, transmittance, contrast, reliability and the like of the liquid crystal television are greatly improved, and the technical indexes not only require technical improvement of devices, such as improvement selection of backlight, optimization selection of low-resistance materials, improvement selection of a polaroid and a black liner and design of electrode spacing and width to wait for improvement optimization of a series of technologies. It is also very challenging for liquid crystal materials, such as development of combined liquid crystal materials with low rotational viscosity, combined liquid crystal materials with high reliability, high elastic constants K and K33/K11Large ratio of the liquid crystal material, and the like, thereby also determining the stable status of the two modes of in-plane switching (IPS) and Fringe Field Switching (FFS).
Excellent liquid crystal compositions also bring about significant display effects on devices, such as: the pursuit of fast response of the device can be realized by reducing the cell thickness and changing the electrode design, and meanwhile, the liquid crystal material is required to have low rotational viscosity or rotational viscosity/K11The characteristics of (a); the improvement of the residual image of the device can be realized by the matching of PI, frame glue and liquid crystal material, and the switching of different PI and frame glue can be realized to improve the reliability of the liquid crystal material; the overall trend of high-transmittance display devices is to develop liquid crystal materials using negative dielectric materials, and the realization of high-contrast device performance requires that the liquid crystal materials have high elastic constants K and K33/K11The characteristic of large ratio; thus, a composition having a low rotational viscosity, a high elastic constant K and K is provided33/K11The liquid crystal composition with large ratio is a problem to be solved in the field.
Disclosure of Invention
As a result of intensive studies and extensive experiments to solve the above-mentioned problems, the present inventors have surprisingly found that a liquid crystal composition of the present invention can provide a liquid crystal composition having an appropriate rotational viscosity and a high elastic constant K and K33/K11A liquid crystal composition having a large ratio.
Specifically, the present invention provides a dielectrically negative liquid crystal composition for IPS-TV or FFS-TV,
comprises the following components in percentage by mass:
18-30% of a compound shown as a formula I, 3-12% of a compound shown as a formula II, more than three compounds shown as a formula III with a total mass content of 20-28%, more than two compounds shown as a formula IV with a total mass content of 22-28%, and one or more compounds shown as formulas V-1-V-4 with a total mass content of 10-25%:
wherein,
R1represents a linear alkyl group having 1 to 5 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms;
ra, Rc, Rd and Re independently represent a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 5 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms;
R3、R4、R5independently represent a linear alkyl group having 1 to 5 carbon atoms, a linear alkenyl group having 2 to 5 carbon atoms, and one or more of-CH groups which are not linked2-optionally substituted with cyclopentylene or cyclopropylene;
m represents 0 or 1;
(F) represents H or F.
The liquid crystal composition provided by the invention has proper rotational viscosity and high elastic constant K and K33/K11The performance parameter with large ratio.
The liquid crystal composition provided by the invention is prepared by controlling the addition of compounds shown in formula I and formula IIThe content of the compound realizes the characteristics of good reliability and proper rotational viscosity of the liquid crystal composition; the liquid crystal composition is provided with high K and K by adding the compounds shown in the formulas III and IV33/K11The characteristic of large ratio; the liquid crystal composition has optical anisotropy with adjustable range by adding the compound shown in the formula V, and solves the problems that the existing liquid crystal composition simultaneously has good reliability, proper rotary viscosity, high K and K33/K11The ratio is large.
The invention also provides a display element or display with an IPS/FFS liquid crystal display mode, which comprises the liquid crystal composition, wherein the liquid crystal display element is an active matrix addressing display element.
A liquid crystal display element or a liquid crystal display comprising the liquid crystal composition of the present invention has an appropriate response speed and a high contrast.
Detailed Description
[ liquid Crystal composition ]
The invention provides a liquid crystal composition with negative dielectric property applied to IPS-TV or FFS-TV,
comprises the following components in percentage by mass:
18-30% of a compound shown as a formula I, 3-12% of a compound shown as a formula II, more than three compounds shown as a formula III with a total mass content of 20-28%, more than two compounds shown as a formula IV with a total mass content of 22-28%, and one or more compounds shown as formulas V-1-V-4 with a total mass content of 10-25%:
wherein,
R1represents a linear alkyl group having 1 to 5 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms;
ra, Rc, Rd and Re independently represent a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 5 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms;
R3、R4、R5independently represent a linear alkyl group having 1 to 5 carbon atoms, a linear alkenyl group having 2 to 5 carbon atoms, and one or more of-CH groups which are not linked2-optionally substituted with cyclopentylene or cyclopropylene;
m represents 0 or 1;
(F) represents H or F.
The liquid crystal composition provided by the invention has proper rotational viscosity and high elastic constants K and K33/K11The performance parameter with large ratio.
Examples of the alkyl group having 1 to 5 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 alkoxy group having 1 to 5 carbon atoms include a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, an n-butoxy group, an isobutoxy group, a pentyloxy group, a hexyloxy group, a heptyloxy group, an octyloxy group, a nonyloxy group, and a decyloxy group.
Examples of the alkenyl group having 2 to 5 carbon atoms include a vinyl group, a 1-propenyl group, a 1-butenyl group, a 2-butenyl group, a 3-butenyl group, a 1-pentenyl group, a 2-pentenyl group, a 3-pentenyl group, a 4-pentenyl group, a 1-hexenyl group, a 2-hexenyl group, and a 3-hexenyl group.
In the liquid crystal composition of the present invention, the aforementioned three or more compounds represented by formula III are preferably compounds represented by III-1-1 to III-1-10 and/or compounds represented by III-2-1 to III-2-9:
in the liquid crystal composition of the present invention, the two or more compounds represented by formula IV are preferably compounds represented by formulae IV-1 to IV-10:
in the liquid crystal composition of the present invention, the compound represented by the formula V-1 is preferably selected from the group consisting of compounds represented by the formulae V-1-1 to V-1-5:
in the liquid crystal composition of the present invention, the compound represented by the aforementioned formula V-2 is preferably selected from the group consisting of compounds represented by the formulae V-2-1 to V-2-5:
in the liquid crystal composition of the present invention, the compound represented by the aforementioned formula V-3 is preferably selected from the group consisting of compounds represented by the formulae V-3-1 to V-3-7:
in the liquid crystal composition of the present invention, the compound represented by the aforementioned formula V-4 is preferably selected from the group consisting of compounds represented by the formulae V-4-1 to V-4-9:
the liquid crystal composition of the present invention preferably further comprises one or more compounds represented by formula vi:
wherein R is6Rf independently represents a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 5 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms;
The compound shown in the formula VI has low rotational viscosity and larger refractive index, and can increase the dielectric anisotropy of the liquid crystal composition and adjust the optical anisotropy of the liquid crystal composition after being added, so as to meet the requirements of device products with different cell thicknesses at present.
In the liquid crystal composition of the present invention, it is preferable that the compound represented by the formula VI is selected from the group consisting of compounds represented by the following formulae VI-1 to VI-17:
the liquid crystal composition of the present invention preferably further comprises one or more compounds represented by formula vii:
wherein R is7Represents a carbon number of 1 to 5The linear alkyl group or the linear alkenyl group having 2 to 5 carbon atoms;
rg represents a C1-5 linear alkyl group, a C1-5 linear alkoxy group, or a C2-5 linear alkenyl group;
The compound shown in the formula VII has higher clearing point and larger refractive index, and after the compound is added, the clearing point of the liquid crystal combination can be increased to meet the storage range of devices of different device manufacturers, and the optical anisotropy of the liquid crystal combination can be adjusted to meet the requirements of the current device products with different box thicknesses.
In the liquid crystal composition of the present invention, preferably, the aforementioned compound represented by the formula VII is selected from the group consisting of the compounds represented by the following formulae VII-1 to VII-9:
the liquid crystal composition of the present invention preferably further comprises one or more compounds represented by formula viii:
R8represents a linear alkyl group having 1 to 5 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms;
rh represents a C1-5 linear alkyl group, a C1-5 linear alkoxy group, or a C2-5 linear alkenyl group.
The compound shown in the formula VIII has lower rotational viscosity and larger dielectric anisotropy, and the dielectric anisotropy of the liquid crystal composition can be increased after the compound is added to meet the driving voltage of the IC of the current diversified devices.
In the liquid crystal composition of the present invention, preferably, the compound represented by the above formula VIII is selected from the group consisting of compounds represented by the following formulas VIII-1 to VIII-5:
the liquid crystal composition of the present invention preferably further comprises one or more compounds represented by formula ix:
wherein R is9Ri independently represents a linear alkyl group having 1 to 5 carbon atoms or a linear alkoxy group having 1 to 5 carbon atoms; r9Any one or more of the radicals indicated being unconnected-CH2-optionally substituted with cyclopentylene, cyclobutyl or cyclopropylene;
W represents-O-, -S-or-CH2O-；
p represents 0 or 1.
The compound shown in the formula IX has very large dielectric anisotropy and also has the characteristic of large refractive index, and the dielectric anisotropy of the liquid crystal composition can be increased after the compound is added to meet the driving voltage of the IC of the diversified devices at present; and the optical anisotropy of the liquid crystal combination can be adjusted to meet the requirements of the current device products with different cell thicknesses.
In the liquid crystal composition of the present invention, preferably, the aforementioned compound represented by the formula IX is selected from the group consisting of the following compounds represented by the formulae IX-1 to IX-12:
wherein R is91、Ri1Each independently represents an alkyl group having 1 to 10 carbon atoms.
The liquid crystal composition of the present invention preferably further comprises one or more compounds of formula X other than formula I and formula II:
wherein R is10And Rj independently represents a C1-5 linear alkyl group, a C1-5 linear alkoxy group, or a C2-5 linear alkenyl group;
The compound shown in the formula IX has lower rotational viscosity and excellent intersolubility, and can improve the low-temperature performance of the liquid crystal composition after being added, broaden the application range of liquid crystal and meet the requirements of diversified devices with different application requirements at present.
In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula X is selected from the group consisting of compounds represented by the following formulae X-1 to X-9:
as a further preferable scheme, the liquid crystal composition provided by the invention specifically comprises the following components by mass:
18-30% of a compound of formula I; 4-11% of a compound represented by formula II; 20-28% of at least three compounds selected from seven compounds shown in formulas III-1-1, III-1-2, III-1-10, III-1-3, III-2-1, III-2-2 and III-2-8; 22-28% of at least two compounds selected from five compounds shown in a formula IV-1, a formula IV-2, a formula IV-3, a formula IV-4 and a formula IV-6; 10% -25% of one or more of twelve compounds selected from V-1-1, V-1-3, V-1-4, V-2-3, V-2-4, V-2-5, V-3-3, V-3-4, V-4-1, V-4-3, V-4-5 and V-4-8:
in the liquid crystal composition of the present invention, optionally, dopants with various functions may be added, and when a dopant is contained, the content of the dopant is preferably 0.01 to 1.5% by mass in the liquid crystal composition, and examples of the dopant include an antioxidant, an ultraviolet absorber, a chiral agent, and a polymerizable compound:
P independently represents a polymerizable group:
sp independently represents a single bond, an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, any one or more of which are not connected-CH2May be substituted by-O-, -S-, -CO-, -CH2O-、-OCH2-, -COO-, -OOC-or an acrylate group;
e represents 0 or 1;
R11、R12、R13、R15each independently represents a C1-8 linear alkyl group, any one or more of which are not linked-CH2-optionally substituted with cyclopentylene or cyclopropylene;
R14represents a linear alkyl group having 10 to 20 carbon atoms;
o represents 1, 2, 3 or 4.
[ liquid Crystal display element or liquid Crystal display ]
The invention also relates to a liquid crystal display element or a liquid crystal display comprising any one of the liquid crystal compositions; the display element or display is an active matrix display element.
Optionally, the active matrix display element or display is an IPS-TFT/FFS-TFT liquid crystal display element or display.
The liquid crystal composition provided by the invention is contained in a liquid crystal display element or a liquid crystal display, the contrast of the display element or the display is between 1200 and 3500, and the normal-temperature 25 ℃ average response from gray scale to gray scale is between 6ms and 14 ms.
Compared with the prior art, the liquid crystal composition has the advantages of proper rotational viscosity, high K and K33/K11Large ratio, etc., and is especially suitable for IPS or FFS mode LCD TV.
Examples
In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In this specification, unless otherwise specified, the percentages refer to mass percentages, temperatures are in degrees centigrade (° c), and the specific meanings and test conditions of other symbols are as follows:
cp represents a liquid crystal clearing point (DEG C), and is measured by a DSC quantitative method;
Δ n represents optical anisotropy, noRefractive index of ordinary light, neThe refractive index of the extraordinary ray is measured under the conditions of 25 +/-2 ℃ and 589nm, and the Abbe refractometer is used for testing;
Δ ε represents dielectric anisotropy, and Δ ε∥-ε⊥Wherein, epsilon∥Is a dielectric constant parallel to the molecular axis,. epsilon⊥Dielectric constant perpendicular to the molecular axis, at 25 + -0.5 deg.C, 20 μm vertical cell, INSTEC: ALCT-IR1 test;
γ1expressed as rotational viscosity (mPas) at 25 + -0.5 deg.C, 20 micron vertical cell, INSTEC: ALCT-IR1 test;
K11is a torsional elastic constant, K33For the splay spring constant, the test conditions were: at 25 ℃, INSTEC is ALCT-IR1 and a 20-micron vertical box;
the preparation method of the liquid crystal composition comprises the following steps: weighing each liquid crystal monomer according to a certain proportion, putting the liquid crystal monomers into a stainless steel beaker, putting the stainless steel beaker filled with each liquid crystal monomer on a magnetic stirring instrument for 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 represented by codes, and the code representation methods of the liquid crystal ring structure, the end group and the connecting group are shown in the following tables 1 and 2.
Corresponding code of the ring structure of Table 1
TABLE 2 corresponding codes for end groups and linking groups
Examples are:
Example 1
The formulation and corresponding properties of the liquid crystal compositions are shown in table 3 below.
TABLE 3 formulation and corresponding Properties of the liquid crystal composition of example 1
Example 2
The formulation and corresponding properties of the liquid crystal compositions are shown in table 4 below.
TABLE 4 formulation and corresponding Properties of the liquid crystal composition of example 2
Comparative example 1
The formulation and corresponding properties of the liquid crystal compositions are shown in table 5 below.
TABLE 5 formulation and corresponding Properties of comparative example 1 liquid Crystal composition
CY-3-O4 in example 2 was adjusted to PY-3-O2 and the remaining monomer trim maintained the same Δ n [589nm,25 ℃ C.) as in example 2]And K11As comparative example 1,/Δ ε. The liquid crystal composition of example 2 of the present invention had high elastic constants of K, as compared with comparative example 133/K11Large ratio, high contrast ratio for LCD, and gamma1/K11Smaller, faster response, and can be used for developing high-contrast and fast-response liquid crystal displays.
Example 3
The formulation and corresponding properties of the liquid crystal compositions are shown in table 6 below.
TABLE 6 formulation and corresponding Properties of the liquid crystal composition of example 3
Comparative example 2
The formulation and corresponding properties of the liquid crystal compositions are shown in table 7 below.
TABLE 7 formulation and corresponding Properties of the comparative example 2 liquid Crystal composition
The CCY class in example 3 was replaced with CLY class, and the remaining monomer trim maintained the same Δ n [589nm,25 ℃ C.) as in example 3]And K11As comparative example 2,/Δ ε. The liquid crystal composition of example 3 of the present invention had a larger K than that of comparative example 233/K11The larger the ratio, the more excellent the contrast ratio for the liquid crystal display, although comparative example 2 has γ1/K11The numerical value is slightly smaller, but when the response time of the device is met, the contrast improvement of the IPS/FFS mode liquid crystal device is a hot spot for performance pursuit of various device manufacturers at present.
Example 4
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 8 below.
TABLE 8 formulation and corresponding Properties of the liquid crystal composition of example 4
Example 5
The formulation and corresponding properties of the liquid crystal compositions are shown in table 9 below.
TABLE 9 formulation and corresponding Properties of the liquid crystal composition of example 5
Example 6
The formulation and corresponding properties of the liquid crystal composition are shown in table 10 below.
TABLE 10 formulation and corresponding Properties of the liquid crystal composition of example 6
Example 7
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 11 below.
TABLE 11 formulation and corresponding Properties of the liquid crystal composition of example 7
Comparative example 3
The formulation and corresponding properties of the liquid crystal compositions are shown in table 12 below.
TABLE 12 formulation and corresponding Properties of comparative example 3 liquid Crystal composition
CC-3-V1 in example 7 was adjusted to CC-5-3, and the remaining monomer trim maintained the same Δ n [589nm,25 ℃ C.) as in example 7]And K11As comparative example 3,/Δ ε. The liquid crystal composition of example 7 of the present invention had a larger K than that of comparative example 333/K11The larger the ratio, the more excellent the contrast ratio for the liquid crystal display, and the gamma1/K11Smaller, faster response, and can be used for developing high-contrast and fast-response liquid crystal displays.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. A dielectric negative liquid crystal composition applied to IPS-TV or FFS-TV is characterized by comprising 18-30% of a compound shown in a formula I, 3-12% of a compound shown in a formula II, more than three compounds shown in a formula III, more than two compounds shown in a formula IV and 10-25% of one or more compounds shown in formulas V-1-V-4, wherein the total mass content of the compounds is 20-28%, the total mass content of the compounds is 22-28%, and the total mass content of the compounds is 10-25%:
wherein,
R1represents a linear alkyl group having 1 to 5 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms;
ra, Rc, Rd and Re independently represent a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 5 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms;
R3、R4、R5independently represent a linear alkyl group having 1 to 5 carbon atoms, a linear alkenyl group having 2 to 5 carbon atoms, and one or more of-CH groups which are not linked2-optionally substituted with cyclopentylene or cyclopropylene;
m represents 0 or 1;
(F) represents H or F.
2. The liquid crystal composition of claim 1, wherein the compound of formula iii is selected from the group consisting of compounds of formulae iii-1 to iii-2:
wherein,
R1represents a linear alkyl group having 1 to 5 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms;
ra represents a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 5 carbon atoms, or a linear alkenyl group having 2 to 5 carbon atoms.
3. The liquid crystal composition of claim 2, further comprising one or more compounds of formula vi:
wherein R is6Rf independently represents a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 5 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms;
4. The liquid crystal composition of claim 2, further comprising one or more compounds of formula vii:
wherein R is7Represents a linear alkyl group having 1 to 5 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms;
rg represents a C1-5 linear alkyl group, a C1-5 linear alkoxy group, or a C2-5 linear alkenyl group;
5. The liquid crystal composition of claim 2, further comprising one or more compounds of formula viii:
wherein R is8Represents a linear alkyl group having 1 to 5 carbon atoms or a linear alkenyl group having 2 to 5 carbon atoms;
rh represents a C1-5 linear alkyl group, a C1-5 linear alkoxy group, or a C2-5 linear alkenyl group.
6. The liquid crystal composition of claim 2, further comprising one or more compounds of formula ix:
wherein R is9Ri independently represents a linear alkyl group having 1 to 5 carbon atoms or a linear alkoxy group having 1 to 5 carbon atoms; r9Any one or more of the radicals indicated being unconnected-CH2-optionally substituted with cyclopentylene, cyclobutyl or cyclopropylene;
W represents-O-, -S-or-CH2O-；
p represents 0 or 1.
7. A liquid crystal composition according to claim 2, further comprising one or more compounds of formula x other than formula i and formula ii:
wherein R is10、RjEach independently represents a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 5 carbon atoms, or a linear alkenyl group having 2 to 5 carbon atoms;
8. The liquid crystal composition according to any one of claims 1 to 7, further comprising an antioxidant, an anti-UV agent or a polymerizable additive.
9. The liquid crystal display element or the liquid crystal display of the liquid crystal composition as claimed in any one of claims 1 to 8, wherein the contrast of the display element or the display is 1200-3500, and the average response from gray scale to gray scale at normal temperature and 25 ℃ is 6ms-14 ms.
10. A liquid crystal display element or a liquid crystal display comprising the liquid crystal composition according to any one of claims 1 to 8, wherein the liquid crystal display element or the liquid crystal display is an active matrix addressing display element or a display.
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| US20190292459A1 (en) * | 2018-03-23 | 2019-09-26 | Shijiazhuang Chengzhi Yonghua Display Material Co. , Ltd. | Liquid crystal composition |
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| US20190292459A1 (en) * | 2018-03-23 | 2019-09-26 | Shijiazhuang Chengzhi Yonghua Display Material Co. , Ltd. | Liquid crystal composition |
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