Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1990-04-09
1993-08-17
Hille, Rolf
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 44, 25229901, G02F 113
Patent
active
052374408
ABSTRACT:
Molecules of the liquid crystal material of the liquid crystal display panel are oriented along the rubbing directions of the upper and lower substrates, and the orientation thereof tends to be twisted in one direction. The reverse domain wherein the orientation is twisted in the reverse direction occurs at portions of the liquid crystal. Though the reverse domain may be prevented form occurring by rubbing the substrates more strongly, it is impossible to sufficiently rub the surfaces of the respective substrates since the substrates are provided with picture element electrodes thereon so that the surfaces are uneven. The liquid crystal display panel is heated to a transformation point so as to change into an isotropic phase after filling the liquid crystal, then is cooled rapidly. This enables a liquid crystal display panel to be obtained in which the twisted directions of the orientation of the liquid crystal molecules are uniform.
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Watanabe Hiroshi
Yamagishi Nobuyasu
Yokoyama Kazuo
Hille Rolf
Ho Tan
Matsushita Electric - Industrial Co., Ltd.
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