Patent ID: 7261457

Claim:
A surface light source device comprising: a light source; a surface light source conversion member that converts emission light from the light source to planar light and emits the planar light; a light guide that is included in the surface light source conversion member, which includes an emission and a bottom surface that are opposed to each other, includes a side surface that connects the emission surface and the bottom surface, and is disposed such that the side surface is opposed to the light source; and a reflector that reflects emission light from the light source toward the side surface, wherein the surface light source conversion member has a predetermined thickness at a part thereof where the side surface is located, the reflector includes a pair of clamp portions that clamp the surface light source conversion member in a thickness direction thereof and are opposed to each other and a bent portion which is provided between a middle portion of the reflector and one of the clamp portions and is bent inwardly, one of the clamp portions forms an inclined surface which is separated from the emission surface at an angle between 5° and 20°, the inclined surface being brought into contact with an end corner that is formed between the emission surface and the side surface of the light guide, and wherein the bent portion creates a gap that is smaller than the predetermined thickness.