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Polymerizable liquid crystal composition and display device

A technology of polymerizable liquid crystals and liquid crystal compositions, applied in liquid crystal materials, instruments, nonlinear optics, etc., can solve problems such as poor display, uneven alignment, slow polymerization speed, etc., achieve good UV resistance stability, suitable dielectric Anisotropy, effect of appropriate optical anisotropy

Active Publication Date: 2015-02-11
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Japanese patent JP2003193053 provides a polymeric liquid crystal composition with a lower melting point, but there is a serious problem of uneven alignment
U.S. Patent US6090308 provides a polymeric liquid crystal composition with a lower melting point, but there are problems such as poor stability and easy crystallization
[0014] In the prior art, a single polymerizable compound is generally used, so that various problems arise, such as: the polymerization speed is slow or fast, it is not easy to control, the residual amount after polymerization is too high, and various display problems may occur. Phenomena such as afterimages, display unevenness

Method used

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  • Polymerizable liquid crystal composition and display device
  • Polymerizable liquid crystal composition and display device
  • Polymerizable liquid crystal composition and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Add 0.20% compound Ⅰ-5 and 0.10% compound Ⅱ-1 to 99.7% LC-1 to prepare polymeric liquid crystal composition PLC-2:

[0092]

[0093] The physical parameters of PLC-2 are: Δn: 0.090, Δε: -3.0, Cp: 79.2°C.

[0094] Using the vacuum infusion method, inject PLC-2 into a liquid crystal cell with an ITO conductive layer (indium tin oxide conductive layer) with a cell thickness of 3.8 μm and coated with a polyimide alignment film that induces homeotropic alignment, and measure After the pre-tilt angle (crystal rotation method) of the liquid crystal cell (89.6°), a frequency of 60-1000HZ, 10-30V AC voltage is applied to it, and a high-pressure mercury lamp is used to irradiate ultraviolet rays to the liquid crystal cell to adjust the irradiation intensity on the surface of the liquid crystal cell 10~30mW / cm 2 , irradiated for 300s, and then tested the pretilt angle of the liquid crystal cell after ultraviolet irradiation, and obtained the pretilt angle of the liquid crystal...

Embodiment 2

[0097] Add 0.20% compound I-5 and 0.10% compound II-4 to 99.7% LC-1 to prepare polymerizable liquid crystal composition PLC-3:

[0098]

[0099] The physical parameters of PLC-3 are: Δn: 0.090, Δε: -3.0, Cp: 79.1°C.

[0100] Using the vacuum infusion method, inject PLC-3 into a liquid crystal cell with an ITO conductive layer (indium tin oxide conductive layer) with a cell thickness of 3.8 μm and coated with a polyimide alignment film that induces a homeotropic orientation. After the pre-tilt angle (crystal rotation method) of the liquid crystal cell (89.6°), a frequency of 60-1000HZ, 10-30V AC voltage is applied to it, and a high-pressure mercury lamp is used to irradiate ultraviolet rays to the liquid crystal cell to adjust the irradiation intensity on the surface of the liquid crystal cell 10~30mW / cm 2 , irradiated for 300s, and then tested the pretilt angle of the liquid crystal cell after ultraviolet irradiation, and obtained the pretilt angle of the liquid crystal ce...

Embodiment 3

[0109] Add 0.20% compound Ⅰ-6 and 0.10% compound Ⅱ-7 to 99.7% LC-2 to prepare polymeric liquid crystal composition PLC-5:

[0110]

[0111] The physical parameters of PLC-5 are: Δn: 0.098, Δε: -2.6, Cp: 75.2°C

[0112] Using the vacuum infusion method, inject PLC-5 into a liquid crystal cell with an ITO conductive layer (indium tin oxide conductive layer) with a cell thickness of 3.8 μm and coated with a polyimide alignment film that induces homeotropic alignment, and measure After the pre-tilt angle (crystal rotation method) of the liquid crystal cell (89.6°), a frequency of 60-1000HZ, 10-30V AC voltage is applied to it, and a high-pressure mercury lamp is used to irradiate ultraviolet rays to the liquid crystal cell to adjust the irradiation intensity on the surface of the liquid crystal cell 10~30mW / cm 2 , irradiated for 300s, and then tested the pretilt angle of the liquid crystal cell after ultraviolet irradiation, and obtained the pretilt angle of the liquid crystal ...

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Abstract

The invention provides a novel polymerizable liquid crystal composition comprising a first component of at least one compound represented by the general formula I, a second component of at least one compound represented by the general formula II, a third component of at least one compound represented by the general formula III, and a fourth component of at least one compound represented by the general formula IV. According to the polymerizable liquid crystal composition, polymerization speed can be controlled, polymeric compound residues can be reduced, and risks of causing poor display problems such as after-images and image display unevenness can be greatly reduced. The invention also provides a liquid crystal display device comprising the polymerizable liquid crystal composition.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a polymerizable liquid crystal composition containing a polymerizable compound and its application in liquid crystal display devices. Background technique [0002] Liquid crystal display elements can be used in various home appliances represented by clocks and electronic calculators, measuring equipment, automotive panels, word processors, computers, printers, televisions, and the like. As the night scene display method, among its representative methods, PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled birefringence) can be cited. , electronically controlled birefringence), OCB (optically compensated bend, optically compensated bending), IPS (in-plane switching, coplanar transformation), VA (vertical alignment, vertical alignment), CSH (color super homeotropic, color super vertical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/46C09K19/38G02F1/1333
Inventor 宋晓龙李鹏飞韩文明
Owner JIANGSU HECHENG DISPLAY TECHCO
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