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Liquid crystal composition and liquid crystal display device thereof

A technology of liquid crystal composition and compound, applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., to achieve the effects of fast response speed, high transmittance, and good transmittance

Pending Publication Date: 2022-03-18
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the preparation of liquid crystal materials with suitable properties in all aspects often requires creative labor.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0197] The liquid crystal composition of Example 1 was formulated according to the compounds listed in Table 4 and their weight percentages, and filled between the two substrates of the liquid crystal display for performance testing.

[0198] Table 4. The formula and performance parameter test results of the liquid crystal composition

[0199]

[0200] From the comparison of Comparative Example 1 and Example 1, it can be seen that compared with the liquid crystal composition comprising only the compound of the general formula I of the present invention, the liquid crystal composition comprising the compound of the general formula I of the present invention and the compound of the general formula II maintains an appropriate In the case of the clearing point, appropriate optical anisotropy and appropriate absolute value of dielectric anisotropy, it also has a large vertical dielectric (ε ⊥ ), the larger ratio of the vertical dielectric to the absolute value of the dielectric ...

Embodiment 2

[0207] The liquid crystal composition of Example 2 was formulated according to the compounds listed in Table 6 and their weight percentages, and filled between the two substrates of the liquid crystal display for performance testing.

[0208] Table 6. The formula and performance parameter test results of the liquid crystal composition

[0209]

[0210] From the comparison of Comparative Example 2 and Example 2, it can be seen that compared with the liquid crystal composition comprising only the compound of the general formula II of the present invention, the liquid crystal composition comprising the compound of the general formula I of the present invention and the compound of the general formula II maintains an appropriate In the case of the clearing point, appropriate optical anisotropy and appropriate absolute value of dielectric anisotropy, it also has a large vertical dielectric (ε ⊥ ), the larger ratio of the vertical dielectric to the absolute value of the dielectric...

Embodiment 3

[0212] The liquid crystal composition of Example 3 was prepared according to the compounds listed in Table 7 and their weight percentages, and filled between the two substrates of the liquid crystal display for performance testing.

[0213] Table 7. The formula and performance parameter test results of the liquid crystal composition

[0214]

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PUM

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Abstract

The invention provides a liquid crystal composition and a liquid crystal display device thereof. The liquid crystal composition comprises at least one compound as shown in a general formula I and at least one compound as shown in a general formula II. The liquid crystal composition has a relatively large vertical dielectric (epsilon perpendicular to), a relatively large ratio (epsilon perpendicular to / delta epsilon) of the vertical dielectric to the dielectric absolute value, a relatively large Kave value and relatively high transmittance under the condition of maintaining a proper clearing point, proper optical anisotropy and a proper dielectric anisotropy absolute value; the liquid crystal display device comprising the liquid crystal composition has better contrast ratio, higher response speed and better transmittance under the condition of maintaining a proper usable temperature range and a proper threshold voltage.

Description

technical field [0001] The invention relates to the field of liquid crystals, in particular to a liquid crystal composition and a liquid crystal display device comprising the liquid crystal composition. Background technique [0002] Liquid crystal display elements can be used in various home appliances represented by clocks and electronic calculators, measuring equipment, automotive panels, word processors, computers, printers, televisions, and the like. According to the type of display mode, liquid crystal display elements can be divided into PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electrically controlled Birefringence), OCB (optical compensated bend), IPS (in-plane switching, in-plane transition), VA (vertical alignment, vertical alignment) and other types. According to the driving method of the element, the liquid crystal display element can be di...

Claims

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Application Information

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IPC IPC(8): C09K19/44G02F1/1333
CPCC09K19/44G02F1/1333C09K19/3066C09K2019/3016C09K2019/3009C09K2019/3027C09K2019/301C09K2019/3004C09K2019/122C09K19/062C09K2019/123C09K19/30C09K19/12C09K19/18C09K19/2007C09K19/3003C09K19/3028C09K19/3048C09K19/3098C09K2019/181C09K2019/2035C09K2019/3021C09K2019/3025C09K2019/303C09K2019/3036C09K2019/305C09K2019/3051C09K2019/3063C09K2019/3071C09K2019/3074C09K2019/3075C09K2019/3077C09K2019/3078C09K2019/3083
Inventor 刘云云贺笛徐爽徐海彬姚利芳杨亚非周振婷潘帝可赵飞
Owner JIANGSU HECHENG DISPLAY TECHCO
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