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AssigneeNippon Oil Co., Ltd.
InventorsHitoshi Mazaki, Yasushi Sato, Takehiro Toyooka
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As a compensator for use in an OCB mode liquid crystal display there is provided a compensating film capable of making color compensation and attaining such a viewing angle expansion as has not been attainable heretofore. A compensating film for a liquid crystal display, constituted by at least one layer of a compensating film to be used in an OCB mode liquid crystal display, the compensating film being formed by a discotic liquid crystalline material having a fixed orientation form of a discotic liquid crystal, the compensating film being disposed between a driving liquid crystal cell and a pair of upper and lower polarizing plates, and the orientation form being a hybrid orientation in which the angle between discotic liquid crystal directors near the upper interface of the film and the film plane and the angle between discotic liquid crystal directors near the lower interface of the film and film plane are different from each other.
A compensating film for an optically compensating birefringence (OCB) mode liquid crystal display comprising at least one layer of a compensating film, said compensating film being a discotic liquid crystalline material having a fixed orientation form of a discotic liquid crystal and being disposed between a driving liquid crystal cell and a pair of upper and lower polarizing plates, and said fixed orientation form being a hybrid orientation in which the angle between the discotic liquid crystal directors near the upper interface of the film is different from that near the lower interface of the film.
An OCB mode liquid crystal display device comprising an OCB mode driving liquid crystal cell, at least one compensating film and a pair of polarizing plates, said at least one compensating film being a film wherein the hybrid orientation of a discotic liquid crystal is fixed, said driving liquid cell being arranged in a substrate orienting treatment direction in the upper and lower faces thereof and the direction obtained upon projection of the compensating film directors in the film plane being arranged approximately in parallel with each other or approximately counterparallelwise.
Dependencies are inferred from the claim text.