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Liquid crystal compound, liquid crystal composition and display apparatus

A technology for liquid crystal compositions and compounds, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of low contrast, difficult gray scale of display, high viewing angle dependence, etc.

Active Publication Date: 2018-03-20
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 apparatus
  • Liquid crystal compound, liquid crystal composition and display apparatus
  • Liquid crystal compound, liquid crystal composition and display apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0134] 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:

[0135] Table 2 liquid crystal composition formula and test performance thereof

[0136]

Embodiment 2

[0138] 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:

[0139] Table 3 liquid crystal composition formula and test performance thereof

[0140]

Embodiment 3

[0142] 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:

[0143] Table 4 liquid crystal composition formula and test performance thereof

[0144]

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Abstract

The invention provides a liquid crystal compound and application thereof. The liquid crystal composition comprises at least one compound as shown in a formula I as described in the specification, wherein the compound accounts for 1-20% by weight of the liquid crystal composition, at least one compound selected from formulae II-1, II-2, II-3 and II-4 and a group of the combination thereof, whereinthe compound accounts for 25-80% by weight of the liquid crystal composition; and at least one compound selected from formulae III-1, III-2, III-3 and III-4 and a group of the combination thereof, wherein the compound accounts for 20-75% by weight of the liquid crystal composition. The liquid crystal composition provided by the invention has proper optical anisotropism, relatively high clearing points, relatively great negative dielectric anisotropy, low viscosity and high reliability, is suitable for a liquid crystal display and meets the demand of quick response of the liquid crystal display. The invention also provides a compound meeting the formula I-2 as shown in the specification.

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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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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