扭曲向列相液晶电光效应的微观机理研究  

A Study on Microcosmic Principle of Twisted Nematic Liquid Crystal Electro-Optic Effect

作　　者：赵永潜 张亚萍[1] 许广建 刘金柱[1] 房灵猛 

机构地区：[1]中国石油大学(华东),山东青岛266580

出　　处：《大学物理实验》2016年第2期1-5,共5页Physical Experiment of College

基　　金：国家自然科学基金面上项目(21476262);教育部高等学校教学研究项目(DWJZW201522hd);中国石油大学(华东)教改项目(JY-A201402);中国石油大学(华东)大学生创新训练计划项目(20151288);中国石油大学(华东)自主创新科研计划本科生项目(2015)

摘　　要：为了探究液晶电光效应的微观机理,以扭曲向列相液晶为研究对象,对液晶分子的变化情况进行了理论分析。运用连续体弹性理论分析了扭曲向列相液晶分子的指向矢取向变化,并对液晶电光效应曲线不同区间范围液晶微观结构的变化进行了系统分析。结果表明:液晶分子在零电场条件下的扭曲是均匀的;当外加电场大于某一值时,液晶分子开始转向,液晶产生电光效应。研究结果对液晶显示器件设计和深入理解液晶电光效应机理具有一定的指导意义。To explore the microscopic mechanism of liquid crystal electro-optic effect,using twisted nematic phase liquid crystal as the research object,the changes of the liquid crystal molecules were analyzed in theory. Using the continuum elastic theory analyzed the changes of orientation vector of twisted nematic liquid crystal molecules,and systematically analyzed the microstructure changes of liquid crystal in different range of liquid crystal electro-optic effect curve.The results showed that the distortion of liquid crystal was uniform under the condition of zero electric field;when the applied electric field was more than a certain value,the liquid crystal molecules began to change directions,and liquid crystal electro-optic effect was produced. The results for the design of liquid crystal display device and deep understanding of mechanism of liquid crystal electro-optic effect have a certain guiding significance.

关 键 词：电光效应 扭曲向列相液晶 连续体弹性理论 自由能 

分 类 号：O469[理学—凝聚态物理]