Oblon, Spivak, McClelland, Maier & Neustadt
Liquid crystal color display device provided with a color filter film and an optical phase plate comprising liquid crystal polymer
 The present invention discloses a liquid crystal color display device comprising; PA0 a liquid crystal cell comprising a pair of substrates, a liquid crystal layer positioned between the substrates and transparent electrodes on the substrates to apply voltage to the layer; PA0 a pair of polarizers positioned on opposite sides of the cell; and PA0 a combination of a color filter film and an optical phase plate positioned between the liquid crystal layer and at least one of the polarizers: wherein the phase plate comprises a film of liquid crystal polymer composition having polyester as a main constituent, being thermotropic and having a glass transition point, and the device is high in productivity, light in weight, good in color reproducibility, good in contrast, excellent in color tone display dependency upon viewing angle and wide in viewing angle. 
Nippon Oil Company, Limited Ricoh Company, Ltd.
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Akihiko Shigeki Hiroyuki Yasuyuki Takehiro Haruo
Kanemoto Iida Ito Takiguchi Toyooka Iimura