应用于高温环境下的加固液晶屏通常会出现显示不均问题,严重影响显示效果。针对这个问题,提出了利用试验和有限元仿真相结合的方法对加固液晶屏高温显示特性进行分析。首先利用有限元仿真软件对液晶原屏和加固液晶屏进行热力学仿真,分析液晶层厚度的变化,再对其进行热力学试验,并与仿真相对比,最后结合仿真和试验结果得出: 出现显示不均(Mura)现象的位置处液晶层的厚度发生了明显的变化,并且随着液晶层厚度变化增大,Mura现象更明显; 高温环境下加固液晶屏较容易出现Mura,且不同厂家的液晶屏出现高温显示Mura的概率不同。为了降低高温环境下Mura出现的机率,建议对原屏进行筛选。

The rugged LCD used in high-temperature environments is prone to present Mura,which severely worsens display quality.To solve the problem,the paper proposes a method based on experiments and finite-element simulation to deeply analyze the high-temperature display characteristics of the rugged LCD.Thermodynamic simulations of common LCDs and rugged LCDs are firstly performed using the finite-element simulation software,and then the thickness changes of the LC layer are analyzed.Thermodynamic experiments are finally performed.The practical and simulation results show that:1) The liquid crystal layer has obvious change at the Mura position,and the Mura becomes severe with the change of the layer thickness;and 2) The rugged LCDs have higher possibility of Mura at high temperature,and Mura possibilities of LCDs from different manufacturers are different.To minimize the problem of Mura,more work should be done to screen the LCDs.