斜劈盒中胆甾相液晶螺距变化对阀值电压的影响

斜劈盒中胆甾相液晶螺距变化对阀值电压的影响 The Influence of Pitch’s Change on the Threshold Voltage in Wedge Shaped Cholesteric Sample Cell 于天池 YU Tian\|chi 1 first-author 郭青山 GUO Qing\|shan 1 郑州工业大学数理力学系,郑州,450002 郑州工业大学数理力学系,郑州,450002 Department of Mathematics,Physics and Mechanics,Zhengzhou University of Technology Department of Mathematics,Physics and Mechanics,Zhengzhou University of Technology 从实验和理论两个方面研究了斜劈盒中胆甾相液晶螺距变化对阀值电压的影响 .实验结果表明 :阀值电压不仅与螺距数有关 ,而且与边界条件引起的螺距收缩和伸展有关 ,在螺距数不变的情况下 ,螺距的收缩使阀值电压提高 ,而螺距的伸展使阀值电压减小 .本文在 Hurault理论基础上 ,考虑到边界条件对胆甾相液晶螺距的影响 ,给出了适用于斜劈盒阀值电压计算的理论公式 The influence of pitch’s change on the threshold voltage is investigated in wedge shaped cholesteric sample cell.Our experimental results shown that threshold voltage related hot only with the number of hecical turns,hut a boundary induced contraction or dilatation of the pitch also has a strong influence on it,at each regin,helong to a fixed n ,the threshold voltage increases as the contraction of the pitch and the thieshold volage decreases as the dilatation of the pitch.On the basic of Hurault’s theory,considing the influence of boundary condition on pitch,we get a theoretical formula with threshold voltage for wedge shaped cholesteric sample cell. 胆甾相液晶 斜错线 螺距数 阀值电压 cholesteric liquid crystal disdination line pitch number threshold voltage 10.14188/j.1671-8836.2000.03.026 O361.4 河南省自然科学基金!（9740 5 3100）资助课题 2000-03-01 2021-04-01 3