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Liquid crystal compound and its liquid crystal composition and liquid crystal display

A technology for liquid crystal compositions and compounds, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of high threshold voltage, poor compatibility, etc., and achieve the effect of low driving voltage, high thermal stability, and high-definition bright spots

Active Publication Date: 2017-07-28
JIANGSU HECHENG DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The liquid crystal compound has appropriate dielectric anisotropy, but when it is used in a liquid crystal composition, it has poor compatibility with other liquid crystals and often has a relatively high threshold voltage

Method used

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  • Liquid crystal compound and its liquid crystal composition and liquid crystal display
  • Liquid crystal compound and its liquid crystal composition and liquid crystal display
  • Liquid crystal compound and its liquid crystal composition and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0072] The compound of general formula I is obtained by the method of suzuki coupling using commercially available raw materials, and the synthetic route is as follows:

[0073]

[0074] Among them, R 1 Represents an alkyl group with 2-5 carbon atoms, L 1 Indicates H or F. Compound M, Compound A and Compound B are all commercially available.

[0075] Prepare the compound of following structural formula by above-mentioned method:

[0076] When R 1 =C 2 h 5 , L 1 When =H, obtain the compound of following structural formula by above-mentioned method:

[0077]

[0078] When R 1 =C 3 h 7 , L 1 When =F, obtain the compound of following structural formula by above-mentioned method:

[0079]

[0080] The MS diagram of compound Ⅰ-1-1 is shown in figure 1 ;

[0081] The MS diagram of compound Ⅰ-2-2 is shown in figure 2 .

[0082] When R 1 =C 3 h 7 , L 1 When =H, utilize the same method to prepare the compound of following structural formula:

[0083]

...

Embodiment 1

[0098] Each compound listed in Table 4 and the weight percentage 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:

[0099] Table 4 liquid crystal composition formula and test performance thereof

[0100]

Embodiment 2

[0102] Each compound listed in Table 5 and the weight percentage 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:

[0103] Table 5 liquid crystal composition formula and test performance thereof

[0104]

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Abstract

The invention provides a liquid crystal composition. The liquid crystal composition comprises one or more compounds presented by a general formula I (shown in the description), wherein R1 represents C1-C5 alkyl or C2-C5 alkenyl; L1 represents H or F; Z1 represents -CH2CH2- or a single bond; X1 represents F, -CN, -CF3 or -OCF3. The liquid crystal composition has relatively high clearing points, ultraviolet light stability and thermal stability and good optical anisotropy and dielectric properties.

Description

technical field [0001] The present invention relates to a liquid crystal compound, a liquid crystal composition comprising the liquid crystal compound and a liquid crystal display, and in particular to a liquid crystal compound having a relatively high clearing point, high ultraviolet light stability, high thermal stability, and good optical anisotropy. Anisotropic and good dielectric property liquid crystal compound and its liquid crystal composition and liquid crystal display. Background technique [0002] Liquid crystal display is a display that uses photoelectric changes of liquid crystals. It has attractive advantages such as small size, light weight, low power consumption, and good display quality. Therefore, it has become the mainstream of flat-panel displays in recent years. With the advancement of technology, the industry is constantly using various methods to improve the color saturation of the liquid crystal display to meet the needs of users. [0003] With the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C25/18C07C17/263C09K19/44C09K19/30G02F1/1333
Inventor 韩文明陈晶晶徐海彬马文阳宋晓龙
Owner JIANGSU HECHENG DISPLAY TECH CO LTD
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