摘要
液晶响应时间是描述液晶显示器性能的重要参数,研究驱动电压对液晶响应时间的影响对确定液晶显示器最佳工作电压具有重要意义。本研究通过理论分析确定了强、弱锚定条件下指向矢上升和下降时间的计算方程,根据电光效应曲线确定了驱动电压选取范围,分析了驱动电压范围内的响应时间变化规律。结果表明:对于本研究所采用的液晶,响应时间随驱动电压的增加呈现先增大后减小的特征,拐点在3 V左右;随着驱动电压的增加,下降时间具有驱动电压成反比的特点,而上升时间则呈现明显的分段特征,驱动电压在2~2.5 V的范围,上升时间几乎不变,驱动电压在2.5~5 V的范围,上升时间增加;结合液晶分子在驱动电压作用下的动力学响应过程,通过强、弱锚定条件下指向矢上升时间和下降时间的计算方程进行模拟可以解释上升时间呈现分段特征的原因。
The response time of liquid crystal is a significant parameter to describe the performance of liquid crystal display.It is important to study the influence of driving voltage on the response time of liquid crystal to determine the optimal operating voltage of LCD.In this study,the calculating equation of the rising and decline time of the director under strong and weak anchoring conditions is determined by theoretical analysis.The range of driving voltage is determined according to the electro-optic effect curve,and the response time variation feature in the range of driving voltage is analyzed.The results show that for the liquid crystal used in this study,the response time increases first and then decreases with the increase of driving voltage,the inflection point is about 3 V;with the increase of driving voltage,the falling time has the characteristics of inverse ratio of driving voltage,while the rising time has obvious sectional characteristics.In the range of 2~2.5 V,the rising time is almost unchanged,and then increases in the range of 2.5~5 V.Combined with the dynamic response process of liquid crystal molecules under the driving voltage,the reason why the rising time presents piecewise characteristics can be explained by simulating the calculation equation of the rising time and falling time of the directional vector under strong and weak anchoring conditions.
作者
陈逸凡
张婧琦
王桂忠
CHEN Yifan;ZHANG Jingqi;WANG Guizhong(College of Oceanic and Atmospheric Sciences,Ocean University of China,Qingdao 266100,China;College of Information Science and Engineering,Ocean University of China,Qingdao 266100,China)
出处
《大学物理实验》
2019年第6期9-12,39,共5页
Physical Experiment of College
基金
国家自然科学基金(41406197)
国家重点研发计划(2016YFC1401004)
中国海洋大学教学发展基金(2019JXJJ02)
中国海洋大学实验室研究基金(201951016)
中国海洋大学本科生研究发展计划(201910423115X)
