Electro-optical properties of light shutter based on azo-dichroic dye-doped cholesteric liquid crystals

XIE Hui; WANG Hui-hui; AN Ya; LI Mei; CHEN Zhuo

doi:10.3788/YJYXS20153006.0909

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Electro-optical properties of light shutter based on azo-dichroic dye-doped cholesteric liquid crystals

Material Physics & Chemistry | 更新时间：2020-08-12

- Electro-optical properties of light shutter based on azo-dichroic dye-doped cholesteric liquid crystals
- Chinese Journal of Liquid Crystals and Displays Vol. 30, Issue 6, Pages: 909-914(2015)
- 作者机构：
  
  1. 北京科技大学材料科学与工程学院材料物理与化学系北京,100083
  2. 贵州师范大学化学与材料科学学院,贵州贵阳,550001
- 作者简介：
- 基金信息：
  
  Supported by the Major Project of Science and Technology of Guizhou Province "
- DOI：10.3788/YJYXS20153006.0909
  CLC： TN141.9;TN873+.93
- Received：18 June 2015，
  
  Revised：13 July 2015，
  
  Published：05 December 2015
- 稿件说明：
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谢辉, 王慧慧, 安娅等. 二向色性偶氮染料掺杂胆甾相液晶光阀的电光性能研究[J]. 液晶与显示, 2015,30(6): 909-914

XIE Hui, WANG Hui-hui, AN Ya etc. Electro-optical properties of light shutter based on azo-dichroic dye-doped cholesteric liquid crystals[J]. , 2015,30(6): 909-914
谢辉, 王慧慧, 安娅等. 二向色性偶氮染料掺杂胆甾相液晶光阀的电光性能研究[J]. 液晶与显示, 2015,30(6): 909-914 DOI： 10.3788/YJYXS20153006.0909.

XIE Hui, WANG Hui-hui, AN Ya etc. Electro-optical properties of light shutter based on azo-dichroic dye-doped cholesteric liquid crystals[J]. , 2015,30(6): 909-914 DOI： 10.3788/YJYXS20153006.0909.

摘要

为了制得既能够提供黑色同时又具备高透过率的光阀

本文制备了一种能在反射态和透明态之间切换的主动电场可控性液晶光阀。该光阀主要选用3种偶氮类二向色性染料掺杂螺距位于红外区的胆甾相液晶

并详细地研究了螺距对液晶光阀电光性能的影响。实验结果表明:随着螺距的增大

、

sat

和

均逐渐减小

其中

最大的

和

sat

分别仅为6 V和20 V左右

也仅为0.878 ms

并且该薄膜的透过率在电场的作用下可达80%以上。因此

所制备的DDCLC薄膜既满足了透明显示面板高透过率的要求

又提高了其能见度。

Abstract

To achieve a light shutter with both high transmittance and perfect black

a kind of electrically controllable active liquid crystal light shutter was successfully fabricated where the reflection and transparent states can be readily switched on demand.The light shutter was based on three commercially available azobenzene-dichroic dye-doped cholesteric liquid crystals (DDCLC) with the pitch designed in the range of infrared region

and the effect of cholesteric pitch on their electro-optical characteristics was investigated in detail.Experimental results showed that the

sat

and

were decreased with the increase of pitch

and among the samples the maximum

sat

and

were only about 6 V

20 V and 0.878 ms

respectively.Moreover

the transmittance of DDCLC films can reach more than 80%.Therefore

the proposed DDCLC films meet the requirements of the transparent display panel with high transmittance and visibility.

关键词

Keywords

references

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