Studies of Polymer-Stabilized Cholesteric Texture Films
NATIONAL CHENG KUNG UNIV TAINAN (TAIWAN) DEPT OF PHYSICS
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We report the results obtained from the studies of polymer-stabilized cholesteric texture films. Two sets of samples were fabricated. The first set were fabricated by adding various ferroelectric liquid crystal SmC dopant concentrations in the mixtures. The second were fabricated using a dual-frequency liquid crystal. The experimental results obtained from the first set show that adding a small amount of SmC could significantly improve the cells electro-optical E-O characteristics. Both the driving threshold voltage and the rise time were decreased while the hysteresis width was increased. The result from the second set shows there exists a pronounced hysteresis effect in the transmission versus frequency curve at a given applied voltage. The hysteresis width is increasing as the applied voltage is increasing. A display mode is proposed based on this bistable feature.