液晶显示器件模拟程序的编制与测试  

Simulation Program and Test of LCD

作　　者：于男[1] 黄子强[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054

出　　处：《现代显示》2010年第8期35-42,共8页Advanced Display

摘　　要：文章根据液晶连续弹性体理论、差分迭代法和Berreman的4×4矩阵法,介绍了计算液晶指向矢分布和透过率的数值方法。本次程序的实现采用的是Visual C++,由于在透过率计算中涉及到了exp()函数的幂为复数4×4矩阵,若用C语言则因工作量极大而实现困难。在Matlab中存在函数expm()专门计算幂为矩阵的exp()函数,在界面中绘图功能需用到plot函数。综上考虑,做出了Visual C++与Matlab接口来实现所需函数脱离于Matlab的调用。文章以TN型液晶显示器为例,验证了本软件的正确性,还介绍了本实验室提出的扭曲HAN模式。由于其视角特性尚不明确,利用所编软件,对其液晶盒进行了不同视角下的透过率计算。通过上述计算得到参数的最优设置(Δn=0.08(ne=1.556,no=1.476),d=6μm,p0=20μm),从而获得最大视角,在对比度大于5的基础上,约为-85°到75°。I will show the calculation of the LCD director and transmission based on the continuous elastic theory, difference iterative method, the Berreman＇s 4 ×4 matrix method. The realization of this procedure is used in Visual C＋＋, the calculation of the transmission is related to the function of exp 0 which power is the complex 4 × 4 matrix. Because of the workload, if you use C language it will be great difficult. Function expm 0 which exists in Matlab is used to the calculation of power for the matrix specially. Function plot is necessary in the realization of graphics in interface features. In summation, we make a Visual C＋＋ and Matlab interface to achieve the call of the required function out of Matlab.ln the case of TN-type LCD, I have validated the accuracy of my software. I will show the HAN-type distortion mode which is in independent research and development laboratory-based. Its characteristics is not clear, with the help of this software, I calculated the transmission of LCD under different viewing angle on its LCD cell. Through the above calculation, I acquired the optimal settings of parameters （△n=0.08（nc=1.556,no=1.476）,d=6μm,po=20μm） in order to get the most perspective that is nearly from -85° to 75° in the case that constract is more than 5.

关 键 词：差分迭代法 Berreman 4×4矩阵 HAN模式 指向矢 透过率 

分 类 号：TN141.9[电子电信—物理电子学]