1D03 Electro-Optical Switching of Nematic Liquid Crystals by Means of Polyimides Alignment Layer Having Different Photoactive Moieties

概要

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The electro-optical switching of nematic liquid crystals (NLCs) was induced by polyimides (PIs) having photoactive moieties. In this study, we used three types of PIs to explore factors that affect the optical switching of NLCs. By surface analysis using ESCA if was found that photochemical reaction of PI in the surface by photoirradiation did not occur. The reversible optical switching of NLCs is mainly due to photophysical changes of PI surface. It was found that with decreasing cell gaps, the optical response of NLCs became faster because the electro-optical switching was induced by the change in surface properties of the alignment layer. The electro-optical switching behavior of NLCs was also affected by PI film thickness.
日本液晶学会の論文
1998-10-12