Illuminating device, display device having the same, and light guide plate

A display device, comprising:

• an illuminating device including
• 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, and
• the second light guide layer has no reflecting film,
• the display device further comprising:
• a reflection-type display panel facing the light guide plate of the illuminating device on a side opposite to a viewer.