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Liquid crystal compound, liquid crystal composition and display device

A technology of liquid crystal composition and compound, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., and can solve problems such as high viewing angle dependence, difficulty in display grayscale, and low contrast

Active Publication Date: 2021-01-26
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] The disadvantages of commonly used MLC-TN displays are attributed to their relatively low contrast ratio, relatively high viewing angle dependence and difficulty in producing gray scales in these displays

Method used

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  • Liquid crystal compound, liquid crystal composition and display device
  • Liquid crystal compound, liquid crystal composition and display device
  • Liquid crystal compound, liquid crystal composition and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0128] Each compound listed in Table 2 and the weight percentage thereof are formulated into the liquid crystal composition of Example 1, which is filled between the two substrates of the liquid crystal display for performance testing, and the test data are shown in the following table:

[0129] Table 2 liquid crystal composition formula and test performance thereof

[0130]

Embodiment 2

[0132] Each compound listed in Table 3 and the weight percentage thereof are formulated into the liquid crystal composition of Example 2, which is filled between the two substrates of the liquid crystal display for performance testing, and the test data are shown in the following table:

[0133] Table 3 liquid crystal composition formula and test performance thereof

[0134]

Embodiment 3

[0136] Each compound listed in Table 4 and the weight percentage thereof are formulated into the liquid crystal composition of Example 3, which is filled between the two substrates of the liquid crystal display for performance testing, and the test data are shown in the following table:

[0137] Table 4 liquid crystal composition formula and test performance thereof

[0138]

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PUM

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Abstract

The invention provides a liquid crystal composition and its application. The liquid crystal composition comprises: at least one compound of general formula I accounting for 1-20% of the total weight of the liquid crystal composition; accounting for 25% of the total weight of the liquid crystal composition -80% of at least one compound selected from the group of general formula II-1, II-2, II-3, II-4 and combinations thereof; and at least 20-75% of the total weight of the liquid crystal composition A compound selected from the group consisting of general formulas III-1, III-2, III-3, III-4 and combinations thereof. The liquid crystal composition of the present invention has suitable optical anisotropy, relatively high clearing point, relatively large negative dielectric anisotropy, low viscosity and high reliability, is suitable for liquid crystal displays, and satisfies the demand for fast response of liquid crystal displays . The present invention also provides a compound according to the general formula I-2.

Description

technical field [0001] The invention relates to a liquid crystal compound and a liquid crystal composition, in particular to a liquid crystal with suitable optical anisotropy, high clearing point, large negative dielectric anisotropy, low viscosity and high reliability Composition, and a liquid crystal display device comprising the liquid crystal composition. Background technique [0002] It is well known that the compound of the following structural formula M [0003] [0004] It can be used in electro-optic displays with active matrix addressing based on the ECB effect, IPS (In-Plane Switching) displays or FFS (Fringe Field Switching) displays. [0005] The principle of electrically controlled birefringence, the ECB effect or also the DAP (distortion of aligned phase) effect was first described in 1971 (M.F.Schieckel and K.Fahrenschon, "Deformation of nematic liquid crystals with vertical orientation in electrical fields", Appl. Phys. Lett .19(1971), 3912). This was ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/44C09K19/30C09K19/12
CPCC09K19/12C09K19/30C09K19/44C09K2019/122C09K2019/3004C09K2019/3009C09K2019/301C09K2019/3016C09K2019/3019C09K2019/3025
Inventor 韩文明徐爽徐海彬陈昭远
Owner JIANGSU HECHENG DISPLAY TECHCO
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