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Liquid crystal composition and application thereof

A technology of liquid crystal composition and compound, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of poor compatibility, solid precipitation, etc., and achieve improved afterimage, low conductance I/V value, and fast ion dissipation speed effect

Active Publication Date: 2021-05-21
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hindered amine compounds, as UV absorbers for liquid crystals, have good physical and chemical stability and excellent UV resistance. However, when known hindered amine compounds are miscible with liquid crystal materials, their compatibility will deteriorate. problem, especially when applied to a lower temperature environment, solid precipitation often occurs

Method used

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  • Liquid crystal composition and application thereof
  • Liquid crystal composition and application thereof
  • Liquid crystal composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9 and comparative example 1

[0108] By adding the compounds of general formula I (GUEST-1, GUEST-2 and GUEST-3) with different contents in the following table 5 to HOST-1, the comparative example 1 and Examples 1-9 of the present invention are formed, and the performance test results As shown in Table 5.

[0109] GUEST-1: (belonging to general formula I-1);

[0110] GUEST-2: (belonging to general formula I-2);

[0111] GUEST-3: (belonging to general formula I-5);

[0112] The formula of table 5 comparative example 1, embodiment 1-9 and characterization parameter

[0113]

[0114]

[0115] It can be seen from the data in Table 5 that the liquid crystal composition of the present invention has a significantly lower conductance I / V value and higher reliability under the premise of maintaining VHR-initial and low-temperature storage performance at a stable level.

[0116] figure 1 It is the RDC diagram of the liquid crystal composition of Examples 3, 6, 9 and Comparative Example 1, which shows...

Embodiment 10-18 and comparative example 2

[0118] By adding the compounds of general formula I (GUEST-1, GUEST-2 and GUEST-3) with different contents in the following table 6 to HOST-2, the comparative example 2 and Examples 10-18 of the present invention are formed, and the performance test results As shown in Table 6.

[0119] The formula of table 6 comparative example 2, embodiment 10-18 and characterization parameter

[0120]

[0121] It can be seen from the data in Table 6 that the liquid crystal composition of the present invention has a significantly lower conductance I / V value and higher reliability under the premise of maintaining VHR-initial and low-temperature storage performance at a stable level.

[0122] figure 2 It is the RDC diagram of the liquid crystal composition of Examples 12, 15, 18 and Comparative Example 2, which shows that the liquid crystal composition containing the compound of the general formula I of the present invention has a faster ion dissipation speed, which can effectively improv...

Embodiment 19-27 and comparative example 3

[0124] By adding the compounds of general formula I (GUEST-1, GUEST-2 and GUEST-3) with different contents in the following table 7 to HOST-3, the comparative example 3 and Examples 19-27 of the present invention are formed, and the performance test results As shown in Table 7.

[0125] The formula of table 7 comparative example 3, embodiment 19-27 and characterization parameter

[0126]

[0127] It can be seen from the data in Table 7 that the liquid crystal composition of the present invention has a significantly lower conductance I / V value and higher reliability under the premise of maintaining VHR-initial and low-temperature storage performance at a stable level.

[0128] image 3 It is the RDC diagram of the liquid crystal composition of Examples 21, 24, 27 and Comparative Example 3, which shows that the liquid crystal composition containing the compound of the general formula I of the present invention has a faster ion dissipation speed, which can effectively improve...

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Abstract

The invention relates to a liquid crystal composition and application 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-1 and / or at least one compound as shown in a general formula II-2, the liquid crystal composition provided by the invention can maintain VHR-initial and low-temperature storage performance at a stable level on the premise of proper optical anisotropy and dielectric anisotropy, relatively high clearing point, relatively low rotational viscosity and relatively high Kave value, and has remarkably lower conductivity I / V value and higher ion dissipation speed, the ghost shadow of a liquid crystal panel can be effectively improved, and the reliability is higher.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials, and relates to a liquid crystal composition and its application. Background technique [0002] Liquid crystal displays (LCDs) are used in many fields to display information, and LCDs are used in direct-view displays and projection-type displays. As the photoelectric mode, for example, twisted nematic (TN), super twisted nematic (STN), optically compensated bending (OCB), and electrically controlled birefringence (ECB) along with their various modifications, etc. are used. All of these modes utilize an electric field substantially perpendicular to the substrate or liquid crystal layer, and in addition to these modes there exist electro-optical modes utilizing an electric field substantially parallel to the substrate or liquid crystal layer, such as the in-plane switching (IPS) mode and Fringe Field Switching (FFS) mode, where there is a strong so-called "fringe field", ie a stron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44
CPCC09K19/44C09K19/04C09K19/2007C09K19/12C09K19/3001C09K19/3098C09K2019/0466
Inventor 姚利芳徐海彬陈诺丁文全徐爽
Owner JIANGSU HECHENG DISPLAY TECHCO
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