Electro-optic modes of ferroelectric liquid crystals and their applications

Qi GUO; Yun-meng DU; Hui-jie ZHAO; V G CHIGRINOV; Hoi-sing KWOK

doi:10.37188/YJYXS20203507.0675

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Electro-optic modes of ferroelectric liquid crystals and their applications

Devices and Material Physics | 更新时间：2020-07-13

- Electro-optic modes of ferroelectric liquid crystals and their applications
- Chinese Journal of Liquid Crystals and Displays Vol. 35, Issue 7, Pages: 675-684(2020)
- 作者机构：
  
  1.北京航空航天大学仪器科学与光电工程学院, 北京 100191
  2.香港科技大学先进显示与光电子技术国家重点实验室, 香港 999077
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(61875004);National Natural Science Foundation of China(61405009)
- DOI：10.37188/YJYXS20203507.0675
  CLC： O753.2
- Received：20 March 2020，
  
  Revised：15 April 2020，
  
  Accepted：15 April 2020，
  
  Published：05 July 2020
- 稿件说明：
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Qi GUO, Yun-meng DU, Hui-jie ZHAO, et al. Electro-optic modes of ferroelectric liquid crystals and their applications[J]. Chinese journal of liquid crystals and displays, 2020, 35(7): 675-684.
DOI：

Qi GUO, Yun-meng DU, Hui-jie ZHAO, et al. Electro-optic modes of ferroelectric liquid crystals and their applications[J]. Chinese journal of liquid crystals and displays, 2020, 35(7): 675-684. DOI： 10.37188/YJYXS20203507.0675.

摘要

铁电液晶因具有低电压驱动下的微秒级响应，近年来得到科研工作者的广泛关注，且有望应用于下一代显示及光子学器件领域。本文介绍3种典型铁电液晶光电模式，分别为表面稳定型(surface stabilized ferroelectric liquid crystal，SSFLC)、螺旋形变型(deformed helix ferroelectric，DHF)及电致解旋型(electrically suppressed helix，ESH)。对各光电模式的工作原理及对应的电光效应进行详细阐述，如双稳及多稳态响应、连续灰阶调制、高对比度开关等。同时，光控取向技术在铁电液晶器件中发挥着至关重要的作用。相较于传统摩擦取向层，光控偶氮染料取向层可实现非接触的、锚定能有效控制的铁电液晶取向，这为铁电液晶器件的无缺陷、大面积均匀取向提供前期基础。因此，高对比度、高分辨率、快响应的铁电液晶器件在未来的场序彩色显示、微型显示、2D/3D显示等领域有着广阔应用前景。

Abstract

The ferroelectric liquid crystal (FLC) which has the advantage of a fast response under a low electric field has become one of the most promising candidates of the next generation liquid crystal display (LCD) as well as photonic devices. Three electrooptic modes including surface stabilized FLC (SSFLC)

deformed helix ferroelectric (DHF) mode

and electrically suppressed helix (ESH) mode are reviewed with the corresponding electrooptic effects like bi-and multi-stable switching

continuous modulation of grayscale or phase

and high contrast switching. Moreover

the photo-aligning technique is in high demand compared with the traditional rubbing method for FLC devices

since photo-aligning is a non-contact process

which avoids static charges

particles

and contacting damages. With the advantages of controllable anchoring energy

the photoalignment provides FLC samples with uniform alignment and high contrast ratio. The fast FLCs with a high resolution and high contrast can be applied in the next generation display including field sequential color FLC micro-displays as well as switchable 2D/3D televisions.

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