弹性常数对液晶盒电容的影响  

Influence of elastic constants on the capacitance of liquid crystal cell

作　　者：宋晓龙[1,2] 叶文江[1] 邢红玉[1] 刘小松[1] 

机构地区：[1]河北工业大学理学院,天津300401 [2]天津大学电子信息工程学院,天津300072

出　　处：《河北工业大学学报》2016年第2期92-95,共4页Journal of Hebei University of Technology

基　　金：河北省自然科学基金(A2014202123);河北省教育厅项目(QN2014130);河北工业大学大学生创新创业训练计划(201310080001)河北工业大学教育教学改革研究项目(201502023)

摘　　要：液晶材料的弹性常数影响外加电压下液晶盒中液晶分子的取向排列,导致液晶盒电容发生变化.基于Frank弹性理论和变分原理,研究了扭曲向列相(TN)液晶盒的电容特性.采用差分迭代方法数值模拟计算得到不同扭曲弹性常数下TN盒约化电容随外加电压变化的曲线,由此分析了扭曲弹性常数k22对TN盒电容的影响.液晶盒电容的测量是确定液晶材料弹性常数k22的一种有效的方法.The elastic constants of liquid crystal have an effect on the orientation of liquid crystal molecules with an external applied voltage, which results in a change of the capacitance of liquid crystal cell. Based on Frank elastic theory and variational principle, the capacitance characteristics of a twisted nematic（TN） liquid crystal cell is researched. Using the difference iterative method, the reduced capacitance-voltage curve of the TN cell for different twisted elastic constant is obtained by the numerical simulation. Then, we analyze the influence of twisted elastic constant k22 on the capacitance of liquid crystal cell. Thus, the measurement of capacitance of liquid crystal cell is a kind of effective method to determine the twisted elastic constant k22 of liquid crystal.

关 键 词：液晶盒电容 向列相液晶 弹性常数 差分迭代方法 

分 类 号：O753.2[理学—晶体学]