Filter for liquid crystal display device

Details Filter for liquid crystal display device Filter for liquid crystal display device

G - Physics

02

F

G02F 1/1335 (2006.01) G02B 5/02 (2006.01)

Patent

CA 2147657

A filter for a liquid crystal display device, having a light diffusing plate which is obtained by forming a composition which contains at least two photopolymerizable oligomers or monomers having refractive indexes which differ each other by at least 0.01 in a film-form and irradiating a UV light on the film-form composition. When the filter is fitted to a light emitting side of a liquid crystal display device, an angle of view of the liquid crystal display face plane is widened, shadows due to opaque parts of the device are reduced, and a Moiré fringe is hardly formed.

Ce filtre se compose d'une plaque de diffusion de la lumière. Cette plaque est réalisée à l'aide d'une pellicule incluant au moins deux types de monomères ou oligomères photopolymérisables dont les indices de réfraction diffèrent l'un de l'autre d'au moins 0,01, la pellicule devant ensuite être exposée à un rayonnement ultraviolet. Cet écran, placé sur la face avant d'un écran à cristaux liquides, permet d'élargir l'angle du champ de l'écran à cristaux liquides, de réduire les ombres dans les parties opaques de l'écran, et d'éliminer le moirage en périphérie.

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