Polymerizable liquid crystal composition and display device

A technology of polymerizable liquid crystals and liquid crystal compositions, which can be used in liquid crystal materials, instruments, nonlinear optics, etc., and can solve problems such as high residue, slow polymerization speed, and uneven display

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 at low temperatures
[0014] In the prior art, a single polymerizable compound is generally used, so that various problems occur, such as: slow or fast polymerization, difficult to control, high residual after polymerization, poor low temperature stability, and various problems. A phenomenon of poor display, such as ghosting, uneven display, etc.

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

[0092]0.20% of compound I-5 and 0.10% of compound II-1 were added to 99.7% of LC-1 to prepare liquid crystal composition PLC-3 containing a polymerizable compound.

[0093]

[0094] The physical parameters of PLC-3 are: Δn: 0.090, Δε: -3.0, Cp: 79.2°C. PLC-3 is stored at -20°C for 2 weeks and has good fluidity.

[0095] 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 ...

Embodiment 2

[0098] 0.20% of compound I-5 and 0.10% of compound II-4 were added to 99.7% LC-1 to prepare a liquid crystal composition PLC-4 containing a polymerizable compound.

[0099]

[0100] The physical parameters of PLC-4 are: Δn: 0.090, Δε: -3.0, Cp: 79.1°C. PLC-4 is stored at -20°C for 2 weeks and has good fluidity.

[0101] 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 c...

Embodiment 3

[0110] 0.20% of compound I-6 and 0.10% of compound II-6 were added to 99.7% of LC-2 to prepare liquid crystal composition PLC-5 containing a polymerizable compound.

[0111]

[0112] The physical parameters of PLC-5 are: Δn: 0.090, Δε: -2.75, Cp: 75.6°C. PLC-5 can be stored at -20°C for 2 weeks and has good fluidity.

[0113] 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 o...

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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 residue can be reduced, and problems such as after-image, image display unevenness, low-temperature crystallization, and the like can be greatly reduced. The composition also has good anti-ultraviolet stability, good low-temperature storage performance, relatively high clearing point, appropriate optical anisotropy, and appropriate dielectric anisotropy. 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, PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electronically controlled birefringence), OCB (optical compensated bend, optically compensated bending), IPS (in-plane switching, coplanar transition), VA (vertical alignment, vertical alignment), CSH (color super homeotropic, color super vertical plane ) and other class patterns. According to the dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44G02F1/1333
Inventor 宋晓龙李鹏飞韩文明
Owner JIANGSU HECHENG DISPLAY TECHCO
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