Method of forming an optical compensating plate of a liquid crys

Details Method of forming an optical compensating plate of a liquid crys Method of forming an optical compensating plate of a liquid crys

1993-10-19

1995-10-31

Timm, Catherine

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 99, 156106, 1563082, 264 17, B29C 6502

Patent

active

054626218

ABSTRACT:
A twisted nematic liquid crystal display apparatus rotates the plane of polarization of the light with optical rotatory power of a liquid crystal layer. Thereby a display operation is made by switching pass/interruption of the light by use of a pair of polarizers sandwiching the liquid crystal layer. At this time, by associating an optical compensating member whose optical anisotropy is in the opposite characteristics with a liquid crystal display device, leakage of light and coloration caused by birefringence and optical rotary dispersion in the liquid crystal layer are prevented. Further, the switching characteristic of the light over the entire visible light region is enhanced, and color display is of a high in contrast ratio. Since the optical compensating member is formed of laminated and adhered plural synthetic resin films which are extended monoaxially, and twisted in the opposite direction to the twisting direction of the liquid crystal molecule on the plane, including the extending direction, the quality of display may be improved without deterioration of the advantages of the existing liquid crystal display apparatus, such as those of small size and portability.

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