A kind of liquid crystal composition and its liquid crystal display device

A technology of liquid crystal composition and compound, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of low absolute value of dielectric anisotropy, insufficient optical anisotropy, low clearing point, etc., and achieve large Absolute value of dielectric anisotropy, good low-temperature miscibility, and good weather resistance

Active Publication Date: 2022-06-17
JIANGSU HECHENG DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing liquid crystal composition can obtain better characteristics, but this type of composition has a low clearing point, high viscosity, insufficient optical anisotropy, low absolute value of dielectric anisotropy, and low voltage retention rate. Forming a liquid crystal display with large optical anisotropy, suitable absolute value of dielectric anisotropy, good stability, and good contrast is not helpful, and directly leads to adverse consequences such as low contrast, slow response speed, and poor display effect of the device. , such as foreign patent documents WO9202597, WO9116398, WO9302153, WO9116399, Chinese patent documents CN1157005A, etc., have the above-mentioned shortcomings to varying degrees

Method used

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  • A kind of liquid crystal composition and its liquid crystal display device
  • A kind of liquid crystal composition and its liquid crystal display device
  • A kind of liquid crystal composition and its liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0258] The liquid crystal composition of Example 1 is prepared according to the compounds and weight percentages listed in Table 4, and it is filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0259] Table 4 Liquid crystal composition formula and its test performance

[0260]

[0261]

Embodiment 2

[0263] The liquid crystal composition of Example 2 is prepared according to the compounds and weight percentages listed in Table 5, and it is filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0264] Table 5 Liquid crystal composition formula and its test performance

[0265]

Embodiment 3

[0267] The liquid crystal composition of Example 3 is prepared according to the compounds and weight percentages listed in Table 6, and it is filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0268] Table 6 Liquid crystal composition formula and its test performance

[0269]

[0270]

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Abstract

The invention discloses a liquid crystal composition and a liquid crystal display device thereof. The liquid crystal composition comprises: at least one compound of general formula I, and at least one compound of general formula II. The liquid crystal composition provided by the invention has good low-temperature mutual solubility while maintaining suitable optical anisotropy, high clearing point and large absolute value of dielectric anisotropy. When the liquid crystal composition is applied to a liquid crystal display, the liquid crystal display device can exhibit advantages such as good weather resistance and high contrast.

Description

technical field [0001] The invention relates to the field of liquid crystal materials, in particular to a liquid crystal composition and a liquid crystal display device thereof. Background technique [0002] Liquid Crystal Display (LCD) has achieved rapid development due to its small size, light weight, low power consumption and excellent display quality, and is especially widely used in portable electronic information products. As the size of liquid crystal screens for portable computers, office applications, and video applications increases, liquid crystal displays can be used for large screen displays and eventually replace cathode ray tube (CRT) displays. [0003] According to the type of display mode, it is divided into 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 (optically compensated bend), IPS (in-pla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/44G02F1/1333
CPCG02F1/1333C09K19/44
Inventor 李鹏飞徐海彬韩文明王宇
Owner JIANGSU HECHENG DISPLAY TECH CO LTD
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