Patent ID: 6796669
Filing Date: 2004-09-28
Classification: G02B

Abstract:
An illuminating device, comprising:a light source; and a light guide plate having a first side surface receiving light emitted from the light source, a second side surface facing the first side surface, a third side surface, a fourth side surface, an emitting surface and an opposing surface, the third and fourth side surfaces being located between the first and second side surfaces so as to face each other, and the emitting surface and the opposing surface facing each other with the first, second, third and fourth side surfaces interposed therebetween, wherein: the light guide plate is formed from a first light guide layer and a second light guide layer each having a prescribed thickness in a direction normal to the emitting surface, the first light guide layer has a plurality of reflecting films therein for reflecting light entering the light guide plate through the first side surface toward the emitting surface, wherein the reflecting films are formed within the light guide plate so that the reflecting films are not provided at a surface of the light guide plate, and the second light guide layer has no reflecting film.