Development and Research of Anisotropic Polymer Dispersed Liquid Crystals

• Main Authors: Hsu, Hsiung-Chun, 徐熊群
• Other Authors: Hsu, Chain-Shu
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/88ypb6

碩士 === 國立交通大學 === 理學院應用科技學程 === 106 === The birefringence of polymer dispersed liquid crystal (PDLC) is characterized with the extension process in this study. The non-isotropic optical properties of deformed PDLC are strongly influenced by the tensile stresses of the substrate. The deformed PDLC shows a distinct characteristic, non-isotropic light scattering. We can control the viewing angle of LCD module while the deformed PDLC is applied in the backlight unit. The E7 liquid crystal of high complex flexion rate (Δn) is mixed well with PVA by adding the surfactant. Then the nucleation of PDLC takes place. The mixture is coated on the plate and baked to form a PDLC film. The film is stretched by the constant-speed stretching machine. The deformed PDLC exhibits the varying non-isotropic scattering properties with different extensions and mixing ratios. As a result, the optimized non-isotropic scattering PDLC can be made by the mixing PVA and LC in the ratio of 80 to 20 as film thickness is 90ꭒm with a 60% extension caused by the stretched process