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Liquid crystal composition and liquid crystal display device

A technology for liquid crystal compositions and compounds, applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of slow response speed, low clearing point and high viscosity

Active Publication Date: 2019-04-05
JIANGSU HECHENG DISPLAY TECHCO
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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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  • Liquid crystal composition and liquid crystal display device
  • Liquid crystal composition and liquid crystal display device
  • Liquid crystal composition and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0258] The liquid crystal composition of Example 1 was formulated according to the compounds and weight percentages listed in Table 4, and it was 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 test performance thereof

[0260]

[0261]

Embodiment 2

[0263] The liquid crystal composition of Example 2 was prepared by each compound listed in Table 5 and the weight percentage, which was 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 test performance thereof

[0265]

Embodiment 3

[0267] The liquid crystal composition of Example 3 was prepared by each compound listed in Table 6 and the weight percentage, which was 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 test performance thereof

[0269]

[0270]

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Abstract

The invention discloses a liquid crystal composition and a liquid crystal display device. The liquid crystal composition contains at least one compound of a formula I, and at least one compound of a formula II. The liquid crystal composition provided by the invention also has good low temperature mutual solubility while maintaining suitable optical anisotropy, a high clearing point and a large absolute value of dielectric anisotropy. When the liquid crystal composition is applied to the liquid crystal display device, the liquid crystal display device can exhibit the advantages of good weatherresistance, high contrast, and the like.

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 been developed rapidly 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 LCD screens for portable computers, office applications, and video applications increases, LCDs 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, electrically controlled birefringence), OCB (optically compensated bend, optically compensated bending), IPS (in-plane sw...

Claims

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Application Information

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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 TECHCO
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