Liquid crystal medium mixture and liquid crystal display using same

A liquid crystal display and liquid crystal medium technology, which is applied in liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of insufficient alignment force, affecting the alignment of liquid crystal media, and affecting the reaction and polymerization of polymerizable monomers.

Inactive Publication Date: 2013-01-16
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the existing liquid crystal media generally contain alkenyl compounds, it is beneficial to obtain low rotational viscosity, thereby improving the response of the liquid crystal medium. Improve the response of the liquid crystal medium, and the alkenyl compound contained in the liquid crystal medium is easy to affect the reaction polymerization of the polymerizable monomer,

Method used

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  • Liquid crystal medium mixture and liquid crystal display using same
  • Liquid crystal medium mixture and liquid crystal display using same
  • Liquid crystal medium mixture and liquid crystal display using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] The liquid crystal medium mixture adopts negative type liquid crystal material and two kinds of polymerizable monomers, specifically as follows:

[0098] The structural formula of the negative type liquid crystal material is

[0099] The two polymerizable monomers are RM-A1 and RM-B1 respectively. The structural formula of RM-A1 is as follows:

[0100]

[0101] The structural formula of RM-B1 is as follows:

[0102]

[0103] The molar ratio of RM-A1 to RM-B1 is 1:5, and the total content of the two accounts for 3000ppm of the liquid crystal medium layer. In the mixture of liquid crystal media, RM-A1 and RM-B1 are used in combination, and the size of the polymer bump generated by ultraviolet irradiation is small and uniform, and there is no phenomenon of bright light in the dark state.

Embodiment 2

[0105] The liquid crystal medium mixture adopts negative type liquid crystal material and two kinds of polymerizable monomers, specifically as follows:

[0106] The structural formula of the negative type liquid crystal material is

[0107] The two polymerizable monomers are RM-A1 and RM-B1 respectively. The structural formula of RM-A1 is as follows:

[0108]

[0109] The structural formula of RM-B1 is as follows:

[0110]

[0111] The molar ratio of RM-A1 to RM-B1 is 1:5, and the total content of the two accounts for 1000ppm of the liquid crystal medium layer. In the mixture of liquid crystal media, RM-A1 and RM-B1 are used in combination, and the size of the polymer bump generated by ultraviolet irradiation is small and uniform, and there is no phenomenon of bright light in the dark state.

Embodiment 3

[0113] The liquid crystal medium mixture adopts negative type liquid crystal material and two kinds of polymerizable monomers, specifically as follows:

[0114] The structural formula of the negative type liquid crystal material is

[0115] The two polymerizable monomers are RM-A1 and RM-B1 respectively. The structural formula of RM-A1 is as follows:

[0116]

[0117] The structural formula of RM-B1 is as follows:

[0118]

[0119] The molar ratio of RM-A1 to RM-B1 is 1:5, and the total content of the two accounts for 10000ppm of the liquid crystal medium layer. In the mixture of liquid crystal media, RM-A1 and RM-B1 are mixed, and the size of the polymer bump generated by ultraviolet irradiation is small and uniform, and there is no phenomenon of bright light in the dark state.

[0120] To sum up, the liquid crystal medium mixture for liquid crystal display according to the present invention, through the two or more polymerizable monomers contained in the liquid cryst...

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Abstract

The invention provides a liquid crystal medium mixture and liquid crystal display using the same. The liquid crystal medium mixture comprises the following components: at least one anisotropic liquid crystal material, and two or more polymerizable monomers which can be polymerized under UV (ultraviolet) irradiation, wherein the liquid crystal material comprises an alkenyl compound which is stable to a polymerization reaction during polymerization of the polymerizable monomers; and the polymerizable monomers account for 0.1-1% of the total amount of the liquid crystal medium mixture in part by weight. The liquid crystal medium mixture can be polymerized into polymer bulge with relatively small size and good uniformity by adopting the two or more polymerizable monomers which can be polymerized under the UV irradiation according to a proper ratio, so that poor liquid crystal alignment, and a light spot phenomenon of a liquid crystal panel in the dark state are avoided, thus increasing the response speed of the liquid crystal panel and achieving high contrast and stable massive productivity.

Description

technical field [0001] The invention relates to liquid crystal display technology, in particular to a liquid crystal medium mixture and a liquid crystal display using the same. Background technique [0002] The liquid crystals used in TN (Twisted nematic) or STN (Super twisted nematic) liquid crystal displays are positive liquid crystals, and the long axis of liquid crystal molecules is parallel to the surface of the substrate when no power is applied. The alignment direction of the liquid crystal molecules on the surface of the substrate is determined by the rubbing direction of the alignment layer (Alignment layer, usually made of Polyimide). In a continuous twisted arrangement. When a voltage is applied, the long axes of the liquid crystal molecules tend to align along the direction of the electric field. The disadvantage of TN / STN liquid crystal displays is that the viewing angle is small, and the brightness difference and color difference are serious under large viewi...

Claims

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Application Information

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IPC IPC(8): C09K19/56G02F1/1337
CPCC09K19/062C09K19/10C09K19/3098C09K19/322C09K2019/0448C09K2019/122C09K2019/3422C09K2019/548G02F1/133788G02F1/133742
Inventor 冯惺顾毓波杨流洋钟新辉
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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