Patent ID: 7338195

Claim:
A surface light source device comprising: a light-conductor plate that conducts light at an interior and allows same to exit at a light-exit surface to an outside; and a light source arranged oppositely to a light incident surface of the light-conductor plate and small in size as compared to a width of the light-conductor plate; the light source being held by a fixture engaged on the light-conductor plate, the fixture in part being elastically abutted against an opposite surface of the light source to a surface thereof facing to the light incident surface thereby urging the light source on the light incident surface, wherein the fixture and the light-conductor plate have aligning means for aligning the fixture and the light-conductor plate to each other thicknesswise of the light-conductor plate, the fixture and the light source having aligning means for aligning the fixture and the light source to each other thicknesswise of the light-conductor plate.