Importance

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Abstract

An optical plate having both a light reflecting function and a light transmitting function comprises a layer comprising convex members which are arranged inside or on a surface of the optical plate so that a tip of the convex portion faces a backside of the optical plate, a gap having a transmitting function which is formed between the convex members, and a reflecting layer which is arranged on an outer surface of the convex portion, and on a base or an inner surface of the convex portion, wherein said convex members, said gap and said reflecting layer are arranged so that a part of light ray from the backside directly passes through the gap between the convex members, that a part of remaining light ray is reflected at least one time at the reflecting layer on the outer surface of the convex portion and passes through the gap having a transmitting function formed between the convex members to come out from a surface of the optical plate, and that a part of incident light ray from the surface side is reflected at the reflecting layer on the base or the inner surface of the convex portion to come out from a surface of the optical plate.

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First Claim