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Liquid crystal composition and liquid crystal display device

A technology for liquid crystal compositions and compounds, applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, and can solve problems such as low driving voltage and low viscosity

Active Publication Date: 2016-11-23
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] Although the prior art discloses a liquid crystal composition with a large value of resistivity (ρ), such as Chinese Patent Application Publication No.CN103666485A, the liquid crystal composition in the prior art is being used in liquid crystal televisions, liquid crystal projection Instruments, etc. require low viscosity, high resistivity, suitable optical anisotropy, suitable dielectric anisotropy, high response speed, low driving voltage, high voltage retention and high UV and high temperature stability. In a device with balanced performance, there is a problem that the above-mentioned indicators cannot be satisfied at the same time.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0289] The liquid crystal composition of Example 1 was prepared by each compound listed in Table 3 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:

[0290] Table 3 liquid crystal composition formula and test performance thereof

[0291]

Embodiment 2

[0293] The liquid crystal composition of Example 2 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 table below:

[0294] Table 4 liquid crystal composition formula and test performance thereof

[0295]

[0296] From the test data of Example 1 and Example 2, it can be seen that compared with Comparative Example 1, the liquid crystal composition provided by the present invention has certain optical anisotropy, and better anti-UV and high temperature performance, which can meet the requirements of liquid crystal displays. High contrast and superior anti-UV and high temperature performance requirements.

Embodiment 3

[0298] The liquid crystal composition of Example 3 was prepared by each compound listed in Table 5 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:

[0299] Table 5 liquid crystal composition formula and test performance thereof

[0300]

[0301] From the test data of Example 3, it can be seen that compared with Comparative Example 1, the liquid crystal composition provided by the present invention has certain dielectric anisotropy and better anti-UV and high temperature performance, which can meet the requirements of liquid crystal displays for superior anti-UV. and high temperature performance requirements.

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Abstract

The invention provides a liquid crystal composition. The liquid crystal composition is prepared from, by weight, 1% to 20% of a first compound selected from a group consisted of compounds with the first general formula (please see the specification), 1% to 20% of a second compound selected from a group consisted of compounds with the second general formula (please see the specification), 1% to 50% of a third compound selected from a group consisted of compounds with the third general formula (please see the specification), 1% to 45% of a fourth compound selected from a group consisted of compounds with the fourth general formula (please see the specification) and 15% to 70% of a fifth compound selected from a group consisted of compounds with the fifth general formula (please see the specification). By means of the liquid crystal composition, proper optical aeolotropy, proper dielectric aeolotropy, the proper clearing point, good ultraviolet and high-temperature stability, proper threshold voltage and the high voltage retention rate are achieved. The invention further provides a liquid crystal display device containing the liquid crystal composition.

Description

technical field [0001] The present invention relates to a liquid crystal composition, in particular to a liquid crystal composition with high voltage retention, suitable optical anisotropy, suitable dielectric anisotropy, good ultraviolet and high temperature stability and its application in liquid crystal Displays the application in the device. Background technique [0002] For liquid crystal display elements, according to the display mode of liquid crystal, it is divided into PC (phase change, phase change), TN (twistnematic, twisted nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electrical controlled birefringence), OCB (optical compensated bend), IPS (in-plane switching, in-plane transition), VA (vertical alignment, vertical alignment) and other types. Liquid crystal display elements are classified into reflective type using natural light, transmissive type using backlight, and transflective type using both natu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44G02F1/1333
Inventor 李鹏飞丁文全张鹤鸣
Owner JIANGSU HECHENG DISPLAY TECHCO