The Study On Electro-Optical Properties of Reflective-Dye Guest-Host Polymer Dispersed Ferroelectric Liquid Crystal Device

• Main Authors: Yan-Bo Lu, 盧彥博
• Other Authors: Jiunn-Yih Lee
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/35045562939307112773

碩士 === 國立臺灣科技大學 === 纖維及高分子工程研究所 === 87 === The study deals with a novel process to dispersed dichroic dye (M483、S416) into a varying of ferroelectric liquid crystal (CS-1024) to produce the dye-guest-host ferroelectric liquid crystal (DGHFLC). Using various UV curable polymer concentrations under various intensities blends to produce dye guest-host polymer dispersed ferroelectric liquid crystal (DGHPDFLC), with polarizing reflector (NPF.F3225) to focus on the reflection properties. The operation of DGHFLC depends on the co-operative orientation of a dye by a ferroelectric liquid crystal host, so the model can not make used of two cross polarizers and used of single polarizing reflective form. This model could to compensate for its disadvantage of low brightness. To apply polarizing reflector can not use of backlight. Its avoid high power consumption. The result of this experiment show that only need low drive voltage can be driven, by increasing dye concentration would reduce reflectance. Add 3% wt dye into reflective-DGHFLC-device can reach best optical contrast. Intensities of ultraviolet irradiation too low would decrease reflectance. Only use 5mW-3min could get high reflectivity. Reflective- DGHFLC and DGHPDFLC device have high reflectical contrast ratio.