Analysis of line Mura for fringe field switching mode with negative liquid crystal

Yu-rong LI; Lei YANG; Ming-yang CHEN

doi:10.37188/YJYXS20203510.1044

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Analysis of line Mura for fringe field switching mode with negative liquid crystal

Driving & Controlling | 更新时间：2020-09-28

- Analysis of line Mura for fringe field switching mode with negative liquid crystal
- Chinese Journal of Liquid Crystals and Displays Vol. 35, Issue 10, Pages: 1044-1050(2020)
- 作者机构：
  
  1.人民解放军 63936部队, 北京 100093
  2.江苏大学机械工程学院, 江苏镇江, 212013
- 作者简介：
- 基金信息：
  
  Natural Science Foundation of Jiangsu Province(BK20170559);Postdoctoral Science Foundation of Jiangsu Province(2020Z016)
- DOI：10.37188/YJYXS20203510.1044
  CLC： TN141.9
- Received：27 March 2020，
  
  Revised：20 June 2020，
  
  Accepted：20 June 2020，
  
  Published：05 October 2020
- 稿件说明：
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Yu-rong LI, Lei YANG, Ming-yang CHEN. Analysis of line Mura for fringe field switching mode with negative liquid crystal[J]. Chinese journal of liquid crystals and displays, 2020, 35(10): 1044-1050.
DOI：

Yu-rong LI, Lei YANG, Ming-yang CHEN. Analysis of line Mura for fringe field switching mode with negative liquid crystal[J]. Chinese journal of liquid crystals and displays, 2020, 35(10): 1044-1050. DOI： 10.37188/YJYXS20203510.1044.

摘要

对于高分辨率小尺寸的边缘场切换模式(FFS)产品，负性液晶可以有效提升穿透率与对比度，从而改善画质。在使用负性液晶过程中出现了暗态显示区边缘发亮，即亮线不良(Line Mura)的现象。通过光学和电性仿真以及解析实验对亮线不良问题进行了分析。发现显示器周边的虚拟像素(Dummy pixel)是产生亮线不良最直接的原因，因为这种设计在蟹角(Crab)区域产生了异常高电场，导致暗态时液晶旋转从而产生亮线。本文通过软件模拟分析了亮线产生的因素，并进行了实验验证，最后提出了改善方案。为以后负性液晶FFS模式的显示屏设计提供了很好的指导。

Abstract

Negative liquid crystals is an effective way to increase the transmittance and contrast ratio for the high-resolution small size fringe field switching (FFS) mode display. Bright line comes up on dark state at the edge of display monitor by using negative liquid crystals

which is called line Mura. The line Mura is analyzed by electric and optical simulation and experiments. Dummy pixel around the display monitor is found to be the direct cause

which leads to anomalous electric field in crab region to switch liquid crystal on dark state. The influence factors of line Mura are analyzed

and improvement method is proposed

which provides good guidance for the design of negative LCD in FFS mode in the future.

关键词

Keywords

references

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