Patent ID: 8545081
Filing Date: 2013-10-01
Classification: F21V,F21Y,G02B,G02F

Abstract:
1. An edge-lit backlight device, comprising a light guide plate, light sources and a backplate, wherein: the light guide plate comprises two wedged plate portions and a rectangular plate portion, the two wedged plate portions are disposed at two sides of the rectangular plate portion respectively, each of the wedged plate portions has a larger thickness at a side away from the rectangular plate portion, and the wedged plate portions and the rectangular plate portion each comprise a light incident surface and a bottom surface; the light sources are disposed adjacent to the light incident surfaces of the wedged plate portions and the rectangular plate portion respectively; the backplate comprises an inner surface and an outer surface, two protrusions spaced apart from each other protrude from a bottom of the backplate at locations corresponding to the wedged plate portions, a recessed region is defined below each of the protrusions, a rectangular groove and two wedged grooves disposed at two sides of the rectangular groove respectively are formed at an inner side of the backplate, and the wedged plate portions and the rectangular plate portion are disposed in the two wedged grooves and the rectangular groove respectively; and the edge-lit backlight device further comprises heat dissipating elements disposed in the recessed regions respectively, and the heat dissipating elements and the light guide plate are located at two opposite sides of the backplate respectively.