Liquid crystal composition and liquid crystal display device thereof

A technology of liquid crystal compositions and compounds, applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, to achieve the effects of good contrast, short low-temperature response time, and fast low-temperature response speed

Pending Publication Date: 2022-05-06
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

[0257] The liquid crystal composition of Example 1 was formulated according to the compounds listed in Table 3 and their weight percentages, and filled between the two substrates of the liquid crystal display for performance testing.

[0258] Table 3. The formulation and performance parameter test results of the liquid crystal composition

[0259]

Embodiment 2

[0261] The liquid crystal composition of Example 2 was prepared 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.

[0262] Table 4. The formula and performance parameter test results of the liquid crystal composition

[0263]

[0264]

[0265] From the comparison of Comparative Example 1 and Examples 1-2, it can be seen that the liquid crystal composition of the present invention maintains appropriate optical anisotropy, appropriate clearing point, appropriate dielectric anisotropy, and appropriate room temperature response time. , with a large K ave value, shorter low temperature response time and longer low temperature storage time.

Embodiment 3

[0271] The liquid crystal composition of Example 3 was prepared 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.

[0272] Table 6. The formula and performance parameter test results of the liquid crystal composition

[0273]

[0274]

[0275] From the comparison of Comparative Example 2 and Example 3, it can be seen that the liquid crystal composition of the present invention has a Larger K ave value, shorter low temperature response time and longer low temperature storage time.

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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, at least one compound as shown in a general formula II and at least one compound as shown in a general formula III. The liquid crystal composition disclosed by the invention has a relatively large Kave value, relatively short low-temperature response time and relatively long low-temperature storage time under the conditions of maintaining proper optical anisotropy, proper clearing point, proper dielectric anisotropy and proper normal-temperature response time; the liquid crystal display device containing the liquid crystal composition has better low temperature resistance, better contrast ratio and higher low-temperature response speed under the condition of maintaining proper threshold voltage and proper normal-temperature response speed.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/46G02F1/1333
CPCC09K19/46G02F1/1333
Inventor 赵建芳王立威马文阳
Owner JIANGSU HECHENG DISPLAY TECHCO
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