Patent ID: 8109666
Filing Date: 2012-02-07
Classification: F21S,G02B,G03B,H04N

Abstract:
1. A light guide member made of a light transmitting material, the light guide member comprising: a light emitting surface extending in a first direction and including a convex surface for converging light in a second direction perpendicular to the first direction; and a light incident surface positioned at an end in the first direction; wherein the light emitting surface includes a transitional region adjacent to the light incident surface, the transitional region including said convex surface and a non-convex surface; wherein the convex surface becomes less dominant in the transitional region as proceeding in the first direction toward the light incident surface; wherein the light guide member includes another end in the first direction, said another end comprising a plurality of surfaces including a pair of inclined surfaces; wherein the paired inclined surfaces are mirror symmetrical with respect to a plane of symmetry extending in the first direction; and wherein a grained surface is provided between the paired inclined surfaces, the grained surface being perpendicular to the plane of symmetry.