Study on Electro-optical Properties of Polymer Stabilized Cholesteric Liquid Crystal Cells Driven by In-plane and Vertical Electrical Fields

• Main Authors: Chun-Hao Chen, 陳俊皓
• Other Authors: Jin-Jei Wu
• Format: Others
• Online Access: http://ndltd.ncl.edu.tw/handle/b54s93

碩士 === 國立臺北科技大學 === 光電工程系研究所 === 104 === In this thesis, the electro-optical properties of polymer-stabilized cholesteric liquid crystal cell, composed of chiral dopant and nematic liquid crystal with negative dielectric anisotropy, are investigated. The cholesteric liquid crystal has periodic helical structure, that results in Bragg reflection. The cell can be operated between the standing-helix and lying-helix configuration by in-plane and vertical electric field switching, respectively. The study is divided into two parts. In the first part we prepared cholesteric liquid crystal cell of standing-helix structure doped with different concentrations of monomers which were polymerized by UV irradiation and discussed the electro-optical properties of the cell. In the second part we prepared cholesteric liquid crystal and monomers which were irradiated with UV when applying electrical field and discussed the electro-optical properties. We also compare the results of the two parts.