Eliminating fringe field effect using dielectric protrusions in LCoS

Wen-yi HOU; Fan CHU; Li-lan TIAN; Rui LI; Xiao-qing GU; Xiang-yu ZHOU; Qiong-hua WANG

doi:10.3788/YJYXS20203501.0012

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Eliminating fringe field effect using dielectric protrusions in LCoS

Materials and Devices | 更新时间：2020-07-05

- Eliminating fringe field effect using dielectric protrusions in LCoS
- Chinese Journal of Liquid Crystals and Displays Vol. 35, Issue 1, Pages: 12-18(2020)
- 作者机构：
  
  1.四川大学电子信息学院, 四川成都 610065
  2.北京航空航天大学仪器科学与光电工程学院, 北京 100191
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20203501.0012
  CLC： TB133
- Received：12 September 2019，
  
  Revised：16 October 2019，
  
  Accepted：16 October 2019，
  
  Published：05 February 2020
- 稿件说明：
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Wen-yi HOU, Fan CHU, Li-lan TIAN, et al. Eliminating fringe field effect using dielectric protrusions in LCoS[J]. Chinese journal of liquid crystals and displays, 2020, 35(1): 12-18.
DOI：

Wen-yi HOU, Fan CHU, Li-lan TIAN, et al. Eliminating fringe field effect using dielectric protrusions in LCoS[J]. Chinese journal of liquid crystals and displays, 2020, 35(1): 12-18. DOI： 10.3788/YJYXS20203501.0012.

摘要

提出了一种使用介电突起消除边缘场效应的硅基液晶显示器（Liquid Crystal on Silicon，LCoS）。在像素电极之间设计介电突起结构来阻隔相邻像素电极之间的串扰电场，通过对LCoS的液晶分子指向矢分布和边缘场串扰现象进行仿真，分析了边缘场效应产生的机理及其影响因素，并对相应反射率和相位进行了计算和对比。具有介电突起的LCoS相比传统LCoS在减少相邻像素边缘反射率和相位干扰上有明显的效果，反射率始终维持在96%，相位差保持不变，对比度大于35:1的区域接近60°，整体视角基本不受影响。所提出的介电突起能够很好地消除横向电场对相邻像素内液晶分子取向的影响，进而提高了LCoS的对比度，大大改善了显示效果。

Abstract

An LCoS (Liquid Crystal on Silicon) using dielectric protrusions to eliminate fringe field effect is proposed. The dielectric protrusion structure is designed between the pixel electrodes to block the crosstalk electric field between the adjacent pixel electrodes. The liquid crystal molecular director distribution and fringe field crosstalk of the LCoS are simulated

the mechanism of fringe field effect and its influencing factors are analyzed

and the corresponding reflectivity and phase are calculated and compared. The LCoS with dielectric protrusions has a significant effect on eliminating the edge reflectance and phase interference of adjacent pixels compared to the traditional LCoS. The reflectance is always maintained at 96%

the phase difference remains unchanged

areas with contrast greater than 35:1 are over to 60° and the overall viewing angle is largely unaffected. The proposed dielectric protrusion can eliminate the influence of the transverse electric field on the orientation of liquid crystal molecules in adjacent pixels

which improves the contrast of LCoS and greatly improves the display effect.

关键词

Keywords

references

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