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Liquid crystal composition and its liquid crystal display

A technology of liquid crystal composition and compound, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., and can solve the problems of reduced high and low temperature reliability performance, reduced clearing point, and failure of normal display of liquid crystal displays, etc.

Active Publication Date: 2018-07-24
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the various performances of liquid crystal materials are mutually restricted. Accelerating the response speed will often bring about a decrease in the clearing point, resulting in the failure of the liquid crystal display to work in a high or low temperature environment, and a decrease in high and low temperature reliability. Can't display normally at low temperature

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0153] The compound of general formula Ⅰ-2 is obtained by the method of suzuki coupling using commercially available raw materials, and the synthetic route is as follows:

[0154]

[0155] Among them, R 2 represents an alkyl group having 1 to 5 carbon atoms. Both Compound A and Compound B are commercially available.

[0156] Prepare the compound of following structural formula by above-mentioned method:

[0157] When R 2 =C 2 h 5 When, obtain the compound of following structural formula by above-mentioned method:

[0158]

[0159] When R 2 =C 3 h 7 When, obtain the compound of following structural formula by above-mentioned method:

[0160]

[0161] When R 2 =C 4 h 9 When, obtain the compound of following structural formula by above-mentioned method:

[0162]

[0163] When R 2 =C 5 h 11 When, obtain the compound of following structural formula by above-mentioned method:

[0164]

[0165] Table 2 Compound Liquid Crystal Performance Parameters

...

Embodiment 1

[0173] 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:

[0174] Table 4 liquid crystal composition formula and test performance thereof

[0175]

[0176] From the above Example 1 and Comparative Example 1, it can be seen that when the optical anisotropy, dielectric anisotropy and flow viscosity are similar, the liquid crystal composition of the present invention has a shorter response time and better low-temperature storage stability .

Embodiment 2

[0182] 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:

[0183] Table 6 liquid crystal composition formula and test performance thereof

[0184]

[0185] From the above Example 2 and Comparative Example 2, it can be seen that the liquid crystal composition of the present invention has a shorter response and better low-temperature storage when the optical anisotropy, dielectric anisotropy, clearing point and flow viscosity are similar. stability.

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Abstract

The invention discloses a liquid crystal composition, which comprises: one or more compounds selected from general formula I-1 and / or general formula I-2; one or more compounds selected from general formula II and one or more compounds selected from the general formula III. The liquid crystal composition provided by the invention has properties such as suitable optical anisotropy, suitable dielectric anisotropy, higher clearing point, faster response speed and good low-temperature storage stability, and can be applied to liquid crystal displays , so that the liquid crystal display has the characteristics of short response time, high reliability, and can work normally under high temperature and low temperature.

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 and good low-temperature storage 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, the liquid crystal mixture has a nematic structure with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/30G02F1/1333
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 TECHCO
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