Patent ID: 7857495

Claim:
A vehicle lighting system, comprising: a light guiding member, comprising: a convex curved front face as a light emitting surface; a rear face comprising a plurality of reflecting portions inclined to the convex curved front face; and a side face, comprising: an incidence surface through which a light from a light source disposed opposite to the side face enters into the light guiding member; a non-incidence surface which connects the incidence surface and the convex curved front face and through which the light from the light source does not enter into the light guiding member; and a step formed between the incidence surface and the non-incidence surface, wherein an angle θ defined between the convex curved front face and the side face is such that an external light entering the light guiding member through the convex curved front face and traveling directly to the side face is totally reflected by the side face, wherein said convex curved front face comprises: a straight portion that contacts and extends from said side face; and a curved portion that contacts and extends from said rear face and contacts said straight portion, wherein the light guiding member comprises as a whole nearly a triangle form in section, and wherein an angle β defined between said incidence surface and said non-incidence surface is in a range of 120° to 180°.