西安工程大学本科毕业论文摘要近些年，随着液晶技术的发展，基于液晶的显示器件在各领域均得到了广泛应用。其中，扭曲型向列式液晶因其独特的旋光特性，在众多的显示应用与开发中起着非常重要的作用。但是，针对扭曲型向列式液晶的旋光特性，尚缺乏一个简单有效的研究手段，以及深入研究分析液晶的各因素对最终旋光特性的影响，这就一定程度上限制了扭曲型向列式液晶的发展与应用。本文通过基于时域有限差分方法的电磁场模拟，详细分析了扭曲型向列式液晶的旋光特性及主要因素的最终特性的影响规律，并在此基础上分析了超扭曲向列式液晶的优势。本文的结果将有利于加深对液晶的光学特性，尤其是扭曲型向列式液晶的旋光特性的理解，对扭曲型向列式液晶在实际生活中的应用具有一定的理论指导意义。关键词扭曲型向列式液晶，液晶的旋光性，时域有限差分1西安工程大学本科毕业论文ABSTRACTIn recent years,with the development of LCD technology,crystal display basedon the liquid device has been widely used in various fields.Among them,due to theunique optical properties of the twisted nematic type liquid crystal,it shows a veryimportant role in numerous of applications and developments.However,in view ofthe optical characteristics of twisted nematic type liquid crystal,which is lack of asimple and effective means of research,and in-depth research and analysis of variousfactors on the final optical characteristics of liquid crystal.It limits the developmentand application of twisted nematic type LCD to some extent.In term of electromagnetic field simulation which based on finite difference timedomain method,the optical characteristics of twisted nematic type LCD and finalcharacteristics of the main factors of influence have been analyzed.Based on theresults,the advantages of super twisted nematic liquid crystal type has been alsoanalyzed.The results in this paper will help us understanding of the optical properties ofliquid crystal,especially the optical characteristics of twisted nematic liquid crystal,which also has a certain theoretical guidance for the twisted nematic LCDapplications in actual life.KEY WORDStwisted nematic liquid crystal,liquid crystal's optical rotation,2西安工程大学本科毕业论文目录摘要.ABSTRACT........................23第1章前言…51.1液晶简介及分类51.1.1液晶简介..1.1.2液晶分类....1.2液晶的光学特性..61.2.1光学的基本特性..1.2.3液晶在相位延迟与偏振转换方面的应用..81.3本文研究内容及意义..102.1时域有限差分基本原理及分析流程.·102.1.1时域有限差分基本原理..102.1.2模拟软件及流程介绍.......122.2液晶的DTD模拟及光学特性分析.·12122.2.2FDTD中光学特性分析.....14第3章扭曲型向列式液晶的光学特性研究.…·153.1向列型液晶的光学特性研究..·153.1.1向列型液晶的模型设置.....15153.1.3加电对相位延迟效应的影响..163.2扭曲型向列液晶的光学特性研究....3.2.2扭曲型液晶的偏振扭转分析...183