Liquid crystal composition and liquid crystal display element or liquid crystal display device

A technology for liquid crystal compositions and compounds, which can be applied to liquid crystal materials, instruments, chemical instruments and methods, etc., and can solve problems such as uneven display.

Active Publication Date: 2020-01-07
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the entire liquid crystal has a pre-tilt angle, there is no domino delay phenomenon, and a faster response time can be obtained while maintaining the same driving voltage, and the afterimage level will not be affected. However, due to the dense distribution of Fine Slit electrodes in the pixel , so if the electrode width cannot be evenly distributed, it is easy to appear the problem of uneven display

Method used

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  • Liquid crystal composition and liquid crystal display element or liquid crystal display device
  • Liquid crystal composition and liquid crystal display element or liquid crystal display device
  • Liquid crystal composition and liquid crystal display element or liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0096] The preparation method of liquid crystal composition comprises the following steps:

[0097] (1) Arrange the liquid crystal monomers in order;

[0098] (2) Place the stainless steel beaker on the balance, and put the monomer into the stainless steel beaker with a spoon;

[0099] (3) adding liquid crystal monomers according to the required weight in turn;

[0100] (4) Place the stainless steel beaker with the liquid crystal monomer on the magnetic stirring apparatus to heat and melt;

[0101] (5) After most of the mixture in the stainless steel beaker is melted, a magnetic rotor is added to the stainless steel beaker, the mixture is stirred evenly, and the liquid crystal composition is obtained after cooling to room temperature.

[0102] The structure of the liquid crystal monomer in the embodiment of the present invention is represented by a code, and the code representation methods of the liquid crystal ring structure, terminal group, and linking group are shown in T...

Embodiment 1

[0113] The formula and corresponding properties of the liquid crystal composition are shown in Table 3 below.

[0114] Table 3 The formula and corresponding performance of the liquid crystal composition of embodiment 1

[0115]

[0116]

[0117] The liquid crystal composition provided in Example 1 is polymerized through UV irradiation, and the ultraviolet irradiation intensity is 64mW / cm 2 , the wavelength is 365nm, the irradiation time is 200s, and the conversion rate of the compound represented by formula III as a reactive mesogen (RM) is 30%. The formula for calculating the conversion rate of RM is:

[0118]

[0119] The liquid crystal composition provided in Example 1 has a low viscosity, can realize rapid response, and has moderate dielectric anisotropy Δε, moderate optical anisotropy Δn, and high stability to heat and light. Improving the conversion rate of the reactive mesogen (RM) of the compound represented by formula III by one or more compounds represente...

Embodiment 2

[0121] The formula and corresponding properties of the liquid crystal composition are shown in Table 4 below.

[0122] Formulation and corresponding performance of the liquid crystal composition of table 4 embodiment 2

[0123]

[0124] The liquid crystal composition provided in Example 2 is polymerized through UV irradiation, and the ultraviolet irradiation intensity is 64mW / cm 2 , the wavelength is 365nm, the irradiation time is 200s, and the conversion rate of the compound shown in formula III as reactive mesogen (RM) is 35%.

[0125] The compound shown in formula IV16 is added to the liquid crystal composition provided in Example 2. The compound shown in formula IV16 is a bis-ether structure, which has a larger conjugation and an absorption spectrum closer to the ultraviolet band than the compound with a mono-ether structure. The liquid crystal composition absorbs more energy, which is more conducive to the polymerization of RM and improves the conversion rate of RM. ...

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PUM

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Abstract

The invention provides a liquid crystal composition, which contains one or a plurality of compounds represented by a formula I, one or a plurality of compounds represented by a formula II, one or a plurality of compounds represented by a formula III, and one or a plurality of compounds represented by a formula IV. According to the invention, the liquid crystal composition has low viscosity, can achieve quick response, has moderate dielectric anisotropy delta epsilon, moderate optical anisotropy delta n and high stability to heat and light, and is particularly suitable for PS (polymer stable) or PSA (polymer stable alignment) type liquid crystal display devices.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display. More specifically, it relates to a liquid crystal composition and a liquid crystal display element or a liquid crystal display. Background technique [0002] Thin film transistor liquid crystal display (TFT-LCD) has gone through a long period of basic research. After realizing mass production and commercialization, it has become a mainstream product in LCD applications due to its advantages of lightness, lightness, environmental protection, and high performance: whether it is a small size Mobile phone screens, large-sized notebook computers (Notebook PC) or monitors (Monitor), and large-scale LCD TVs (LCD-TV), TFT-LCD applications can be seen everywhere. [0003] The early commercial TFT-LCD products basically adopted the TN display mode, and the biggest problem was the narrow viewing angle. With the increase of product size, especially in the application of TV field, IPS display...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44G02F1/1333
CPCC09K19/44G02F1/1333
Inventor 梁瑞祥温刚黄亚鹏李元元李佳明员国良王明霞
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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