Patent ID: 8469573

Claim:
A light guide plate, comprising: a light guide plate body, having a light-emitting surface and a reflecting surface; and a plurality of microreliefs, disposed on the reflecting surface, each of the microreliefs having an outer surface and a base area, the outer surface being a curved surface, the base area contacting the reflecting surface, and a ratio of the height of each of the microreliefs to the diameter of the base area of each of the microreliefs is between 1/7 and ¼, wherein a light beam from the light guide plate body is reflected by the outer surface of one of the microreliefs and then emitted from the light-emitting surface, and another light beam from the light guide plate body passes through the outer surface of the microreliefs into the air, then enters the light guide plate body again through the reflecting surface and then is emitted from the light-emitting surface.