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Liquid crystal composition with high voltage stability and good frequency dependence and display device thereof

A liquid crystal composition and composition technology, applied in liquid crystal materials, instruments, nonlinear optics, etc., can solve problems such as short life cycle, and achieve the effects of high-definition bright spots, wide nematic phase temperature range, and good low-temperature stability

Active Publication Date: 2021-07-13
JIANGSU HECHENG DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Liquid crystal materials are an important part of liquid crystal displays, and currently global liquid crystal displays have a great market demand and are mostly used in electronic and electrical products, but their life cycle is short

Method used

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  • Liquid crystal composition with high voltage stability and good frequency dependence and display device thereof
  • Liquid crystal composition with high voltage stability and good frequency dependence and display device thereof
  • Liquid crystal composition with high voltage stability and good frequency dependence and display device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0166] 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:

[0167] Table 3 liquid crystal composition formula and test performance thereof

[0168]

[0169]

[0170] Comparing Example 1 and Comparative Example 1, it can be found that the negative liquid crystal composition of the present invention has a greater absolute value of dielectric anisotropy.

[0171] The liquid crystal composition described in Comparative Example 1 and Example 1 was poured into a 4 μm test box, and DMS505 tested the voltage change data at different frequencies of 25°C, 0°C, -10°C, and -20°C, as shown in Table 4 below :

[0172] Table 4

[0173]

[0174]

[0175] It can be seen from Table 4 that, compared with Comparative Example 1, the voltage of the liquid crystal compositio...

Embodiment 2

[0177] 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:

[0178] Table 5 liquid crystal composition formula and test performance thereof

[0179]

[0180] The liquid crystal composition described in Comparative Example 1 and Example 2 was poured into a 4 μm test box, and DMS505 tested the voltage change data at different frequencies of 25°C, 0°C, -10°C, and -20°C, as shown in Table 6 below :

[0181] Table 6

[0182]

[0183]

Embodiment 3

[0185] The liquid crystal composition of Example 3 was formulated according to the compounds and weight percentages listed in Table 7, which was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0186] Table 7 liquid crystal composition formula and test performance thereof

[0187]

[0188]

[0189] The liquid crystal composition described in Comparative Example 1 and Example 3 was poured into a 4 μm test box, and DMS505 tested the voltage change data at different frequencies of 25°C, 0°C, -10°C, and -20°C, as shown in Table 8 below :

[0190] Table 8

[0191]

[0192]

[0193] It can be seen from Table 8 that, compared with Comparative Example 1, the voltage of the liquid crystal composition of Example 3 of the present invention has smaller changes at different frequencies and different temperatures, higher voltage stability, and better frequency dependence. sex.

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Abstract

The invention discloses a liquid crystal composition with negative dielectric anisotropy. The liquid crystal composition comprises: one or more general formula I-1 accounting for 25-60% of the total weight of the negative liquid crystal composition And\or the compound of I-2; One or more compounds of formula II accounting for 1-20% of the total weight of the negative liquid crystal composition; accounting for 0-25% of the total weight of the negative liquid crystal composition One or more compounds of formula III; one or more compounds of formula IV accounting for 1-40% of the total weight of the negative liquid crystal composition; accounting for 20-60% of the total weight of the negative liquid crystal composition % of one or more compounds of formula V. The invention also discloses a liquid crystal display device comprising the liquid crystal composition of the invention.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a liquid crystal composition with negative dielectric anisotropy, which has a large absolute value and a large dielectric anisotropy, a wide nematic phase temperature range, and good low temperature A liquid crystal composition with properties such as stability and suitable high clearing point, high optical anisotropy, and a liquid crystal display device comprising the liquid crystal composition. Background technique [0002] Liquid crystal display elements have developed from clocks and calculators to various electrical appliances for household use, measurement equipment, automotive panels, word processors, electronic notebooks, printers, computers, televisions, etc. As a representative liquid crystal display method, it can include TN (twisted nematic) type, STN type (super twisted nematic) type, DS (dynamic light scattering) type, GH (guest-host) type, IPS (in-plane switching) ty...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/44C09K19/12C09K19/30G02F1/137
CPCC09K19/12C09K19/3003C09K19/3066C09K19/44C09K2019/122C09K2019/123C09K2019/3004C09K2019/301C09K2019/3016C09K2019/3021C09K2019/3025G02F1/137G02F1/13712
Inventor 王立威马文阳徐海彬韩文明陈昭远
Owner JIANGSU HECHENG DISPLAY TECH CO LTD
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