Patent ID: 7808578
Filing Date: 2010-10-05
Classification: G02B

Abstract:
1. A light guide plate used for receiving and guiding the emitting light of at least one point light source and divided into an effective section capable of providing uniform surface illumination and a transitional section between the effective section and the point light source, the light guide plate comprising: a light-receiving surface next to the point light source for receiving the emitting light of the point light source; a light-emitting surface making an angle with the light-receiving surface, the light that propagates in the light guide plate exiting the light guide plate through the light-emitting surface; a light-reflecting surface positioned opposite the light-emitting surface for guiding the light that passes through the light-receiving surface to the light-emitting surface; and a plurality of light-diffusing structures spread on the transitional section, wherein each light-diffusing structure is a bump structure protruding from the light guide plate and in the shape of a part elliptic cylinder having a long axis and a short axis, and the front surface of the light-diffusing structure facing the point light source is a part elliptic cylindrical surface provided with an indentation to form a W-shaped profile.