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A patterned retarder for a transflective LCD can be fabricated by photo polymerization of a liquid crystalline monomer. It is required for the retarder that pattern size is smaller than pixel size of a LCD and that retardation of the retarder is thermally stable against over 200°C. We have optimized liquid crystalline monomer and fabrication processes of the retarder to achieve high quality patterned retarder.

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We have studied the electro-optical properties in Polymer Network Liquid Crystal Displays which are composed of a three-dimensional polymer network formed in continuous liquid crystal layers prepared by photo-polymerization induced phase separation processes. In view of the behavior in the orientation of the liquid crystal molecule at the polymer's surface, it can be clarified that the electro-optical properties are strongly governed by the polymer. By a combination of two different characteristics of the polymers with respect to a temperature dependence, a variation in the driving voltage for a temperature change can be improved.