Patent ID: 8353614
Filing Date: 2013-01-15
Classification: G02B,G02F

Abstract:
1. A backlight unit, comprising: a light guide plate having at least one side with an optical microstructure, wherein the optical microstructure comprises a plurality of convex lens members, and height-to-pitch ratios of the plurality of convex lens members in a center region of the optical microstructure are different from height-to-pitch ratios of the plurality of convex lens members in side regions of the optical microstructure; and a plurality of light sources directed toward the optical microstructure wherein a center region of the plurality of light sources corresponds to the center region of the optical microstructure and side regions of the plurality of light sources correspond to the side regions of the optical microstructure, wherein intervals of the plurality of light sources in the side regions gradually decrease from innermost to outermost and wherein the plurality of light sources in the side regions are positioned at gradually increasing distances from the light guide plate, going from innermost to outermost positions.