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Blue-phase liquid-crystal composite material and liquid crystal display containing same

A technology of blue-phase liquid crystal and composite materials, which is applied in liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of small Cole coefficient and large Cole coefficient of blue-phase liquid crystal composite materials, and achieve the reduction of saturation voltage and the reduction of electric field The effect of fast response and low voltage

Inactive Publication Date: 2013-09-11
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the invention is to solve the problem that the Cole coefficient of the blue-phase liquid crystal composite material prepared by the prior art method is small, and provide a blue-phase liquid crystal composite material with a large Cole coefficient

Method used

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  • Blue-phase liquid-crystal composite material and liquid crystal display containing same
  • Blue-phase liquid-crystal composite material and liquid crystal display containing same
  • Blue-phase liquid-crystal composite material and liquid crystal display containing same

Examples

Experimental program
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Effect test

Embodiment 1

[0054] This embodiment provides a blue-phase liquid crystal composite material. The blue-phase liquid crystal composite material is formed by photopolymerization of raw material components. Polymerizable monomers, photoinitiators.

[0055] Wherein, the benzyne species has the following structural formula,

[0056]

[0057] where: R 1 The structural formula of is shown in the following formula,

[0058]

[0059] Among them, the value of n is 2; R 2 is a hydrogen group; R 3 is a hydrogen group; R 4 For cyano.

[0060]The parent blue phase liquid crystal is SLC-X (Yongsheng Huatsing Liquid Crystal Co., Ltd, Δn=0.253, Δε=29.6, at298K), and its main components include biphenyl nitrile liquid crystal (biphenyl alkyl nitrile liquid crystal or biphenyl alkoxy Nitrile-based liquid crystal) and fluorine-containing small molecule liquid crystal; the viscosity of the parent blue phase liquid crystal is less than 50mPa, the melting point is lower than -40°C, and the clearing po...

Embodiment 2

[0070] This embodiment provides a blue-phase liquid crystal composite material. The blue-phase liquid crystal composite material is formed by photopolymerization of raw material components. Polymerizable monomers, photoinitiators.

[0071] Wherein, the structural formula of benzynes is shown in the following formula,

[0072]

[0073] Wherein: R1 structural formula is as shown in the following formula,

[0074]

[0075] Among them, the value of n is 4; R 2 is a fluorine group; R 3 is a hydrogen group; R 4 For cyano.

[0076] The parent blue phase liquid crystal is SLC-X (Yongsheng Huatsing Liquid Crystal Co., Ltd, Δn=0.253, Δε=29.6, at298K), and its main components include biphenyl nitrile liquid crystal (biphenyl alkyl nitrile liquid crystal or biphenyl alkoxy Nitrile-based liquid crystal) and fluorine-containing small molecule liquid crystal; the viscosity of the parent blue phase liquid crystal is less than 50mPa, the melting point is lower than -40°C, and the cl...

Embodiment 3

[0086] This embodiment provides a blue-phase liquid crystal composite material. The blue-phase liquid crystal composite material is formed by photopolymerization of raw material components. Polymerizable monomers, photoinitiators.

[0087] Wherein, the structural formula of benzynes is shown in the following formula,

[0088]

[0089] Wherein: R1 structural formula is as follows,

[0090]

[0091] Among them, the value of n is 12; R 2 is a fluorine group; R 3 is a fluorine group; R 4 For cyano.

[0092] The parent blue phase liquid crystal is SLC-X (Yongsheng Huatsing Liquid Crystal Co., Ltd, Δn=0.253, Δε=29.6, at298K), and its main components include biphenyl nitrile liquid crystal (biphenyl alkyl nitrile liquid crystal or biphenyl alkoxy Nitrile-based liquid crystal) and fluorine-containing small molecule liquid crystal; the viscosity of the parent blue phase liquid crystal is less than 50mPa, the melting point is lower than -40°C, and the clearing point is betwee...

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Abstract

The invention provides a blue-phase liquid-crystal composite material and a liquid crystal display containing the blue-phase liquid-crystal composite material, and belongs to the technical field of liquid-crystal materials. The invention solves the problem of low Kell factor in the existing blue-phase liquid-crystal composite material and a liquid crystal display containing the blue-phase liquid-crystal composite material. The blue-phase liquid-crystal composite material comprises the following components: master blue-phase liquid crystal, benzyne substances, chiral compounds, photopolymerizable monomers and a photoinitiator. The blue-phase liquid-crystal composite material provided by the invention has the advantages of high Kell factor, low voltage, high contrast ratio, high response speed to electric field and good stability and the like.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials, and in particular relates to a blue phase liquid crystal composite material and a liquid crystal display containing the material. Background technique [0002] Blue phase liquid crystals (Liquid crystalline Blue Phases, BPs) are a special phase state between isotropic liquid crystals and cholesteric liquid crystals macroscopically, and often appear in high-chiral liquid crystal systems. Microscopically, the blue phase is a lattice defect phase without birefringence, and its lattice parameter size is on the order of the wavelength of visible light (hundreds of nanometers). The blue phase can be divided into three sub-phases from the crystal structure, which are named blue phase I (BPI), blue phase II (BPII) and blue phase III (BPIII), and the corresponding lattice structures are body-centered cubic structure, Simple cubic structure and amorphous state. [0003] Compared with the...

Claims

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Application Information

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IPC IPC(8): C09K19/52G02F1/1333
CPCC09K19/0275C09K19/18C09K19/322C09K19/52C09K19/54C09K19/542C09K19/588C09K2019/0448C09K2019/2078G02F1/137G02F1/13793
Inventor 杨槐李毕荣何万里王玲
Owner BOE TECH GRP CO LTD
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