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Liquid crystal composition and display device thereof

A liquid crystal composition and compound technology, applied in liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of long response time, low resistivity, high operating voltage, etc.

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

Since liquid crystals are usually used as a mixture of various components, the mutual solubility between the components is particularly important, and according to different battery types and application fields, liquid crystals must meet different requirements, such as conductivity, dielectric properties, etc. Anisotropy and optical anisotropy, etc., but the obvious disadvantages in the prior art are longer response time, lower resistivity and too high operating voltage, such as EP0673986, DE19528106, DE19528107
In addition, poor storage stability at low temperature is also a defect of many existing liquid crystal materials.

Method used

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  • Liquid crystal composition and display device thereof
  • Liquid crystal composition and display device thereof
  • Liquid crystal composition and display device thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0161] 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:

[0162]

[0163] Among them, R 1 represents an alkyl group having 1 to 5 carbon atoms. Both Compound A and Compound B are commercially available.

[0164] Prepare the compound of following structural formula by above-mentioned method:

[0165] When R 1 =C 2 h 5 When, obtain the compound of following structural formula by above-mentioned method:

[0166]

[0167] When R 1 =C 3 h 7 When, obtain the compound of following structural formula by above-mentioned method:

[0168]

[0169] When R 1 =C 4 h 9 When, obtain the compound of following structural formula by above-mentioned method:

[0170]

[0171] When R 1 =C 5 h 11 When, obtain the compound of following structural formula by above-mentioned method:

[0172]

[0173] Table 2 Performance parameters of compound liquid crystals ...

Embodiment 1

[0181] 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:

[0182] Table 4 Liquid crystal composition formula and its test performance

[0183]

[0184] From the above Example 1 and Comparative Example 1, it can be seen that when the optical anisotropy, dielectric anisotropy and clearing point are similar, the liquid crystal composition of the present invention has a lower flow viscosity and a faster response speed, and Higher voltage retention after high temperature and UV light.

Embodiment 2

[0190] The liquid crystal composition of Example 2 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:

[0191] Table 6 Liquid crystal composition formula and its test performance

[0192]

[0193] From the above Example 2 and Comparative Example 2, it can be seen that when the optical anisotropy, dielectric anisotropy and clearing point are similar, the liquid crystal composition of the present invention has a lower flow viscosity and a faster response speed, and Higher voltage retention after high temperature and UV light.

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Abstract

The invention discloses a liquid-crystal composition and a display device thereof. The liquid-crystal composition comprises one or more compounds of a general formula I, one or more compounds of a general formula II, one or more compounds of a general formula II, and one or more compounds of a general formula IV. The provided liquid-crystal composition possesses the characteristics that the liquid-crystal composition possesses appropriate optical anisotropy, appropriate dielectric anisotropy, relatively high clearing points, relatively high nematic-phase temperature upper limit, relatively rapid response speed, relatively good anti-UV stability and relatively good high-temperature stability, is applicable to the liquid-crystal display device and enables the liquid-crystal display device to possess rapid response, high reliability and capability of working in a severe environment.

Description

technical field [0001] The present invention relates to a liquid crystal composition, in particular to a liquid crystal composition with suitable optical anisotropy, suitable dielectric anisotropy, higher clearing point, faster response speed, better anti-UV stability and better A liquid crystal composition with high temperature stability, and a liquid crystal display device comprising the liquid crystal composition. Background technique [0002] Liquid crystal material is a mixture of organic rod-shaped small molecular compounds that have both fluidity of liquid and anisotropy of crystal at a certain temperature. Liquid crystal display elements work by utilizing the optical anisotropy and dielectric anisotropy of the liquid crystal material itself, and have been widely used at present. Utilizing the different characteristics and working modes of liquid crystal materials, the device can be designed into various working modes. Among them, the TN mode (twisted nematic mode, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/44G02F1/1333
Inventor 马文阳韩文明徐海彬施红萍马定福李鹏飞丁文全戴慧娟刘云云贺迪姚丽芳张鹤鸣
Owner JIANGSU HECHENG DISPLAY TECH CO LTD
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