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A broadband cholesteric liquid crystal device based on chiral ion monomer and its preparation process

A technology of cholesteric liquid crystals and chiral ions, which is applied in the field of broadband cholesteric liquid crystal devices and its preparation technology, can solve the problems of unstable reflection effect, limited reflection area of ​​cholesteric liquid crystal display devices, etc., and achieve reflection effect Stabilization, stabilization of reflective performance, effect of reducing possibility

Active Publication Date: 2016-12-07
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a broadband cholesteric liquid crystal device based on chiral ionic monomers and its preparation process to solve the problems of limited reflection area and unstable reflection effect of cholesteric liquid crystal display devices

Method used

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  • A broadband cholesteric liquid crystal device based on chiral ion monomer and its preparation process
  • A broadband cholesteric liquid crystal device based on chiral ion monomer and its preparation process
  • A broadband cholesteric liquid crystal device based on chiral ion monomer and its preparation process

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Experimental program
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Effect test

Embodiment

[0034] 1. Preparation of cholesteric liquid crystals

[0035] The proportioning ratio of the cholesteric liquid crystal is:

[0036] HNG715600-100 / S811 / RM257 / CIM=75% / 16% / 2.5% / 6.5% (wt%).

[0037]Among them, HNG715600-100 is a negative nematic liquid crystal produced by Jiangsu Hecheng Display Technology Co., Ltd.; S811 is a chiral agent, and its chemical formula is RM257 is a polymerized monomer with a chemical formula of CIM is a chiral ionic monomer, the chemical formula is

[0038] The cholesteric liquid crystal was heated and stirred on a hot stage, the heating time was 30min, and the heating temperature was 95°C.

[0039] 2. Preparation of liquid crystal devices

[0040] The device is prepared as attached image 3 shown. The above-mentioned cholesteric liquid crystal was injected into a 20 μm liquid crystal cell by the capillary method, a DC voltage of 100 V was applied, and then switched to a high-frequency AC voltage, and the transmittance curve of the device ...

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Abstract

The invention discloses a broadband cholesteric liquid crystal device based on a chiral ionic monomer, which is composed of two transparent substrate layers and a single-layer liquid crystal layer sandwiched between the two transparent substrate layers, and the liquid crystal layer is a stable polymer network. cholesteric liquid crystals. The invention has simple process, reduces the possibility of display defects, has strong implementability, wide reflective area of ​​the device, and stable reflective effect.

Description

technical field [0001] The invention relates to the field of liquid crystal devices, in particular to a broadband cholesteric liquid crystal device based on a chiral ion monomer and a preparation process thereof. Background technique [0002] Nematic liquid crystals are cholesteric liquid crystals obtained after doping with chiral agents. The molecules of the cholesteric liquid crystal are arranged in a helical structure, and the distance of one cycle of the helix is ​​called the pitch of the liquid crystal. Cholesteric liquid crystals have circular dichroism and selective reflection properties. The reflected wavelength follows Bragg's reflection law, that is, Δλ=Δn*p, where Δλ is the size of the reflection band, Δn is the birefringence index, and Δn=n e -n o , n e and n o Respectively refer to the extraordinary light refractive index and the ordinary light refractive index, p is the pitch. Generally, the birefringence Δn of the liquid crystal is less than 0.3, so the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/137G02F1/1333
Inventor 陆红波吴少君许伟吕国强邱龙臻张珊娜胡金良宋志刚
Owner HEFEI UNIV OF TECH
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