Patent ID: 8834006
Filing Date: 2014-09-16
Classification: F21V,G02B,G02F

Abstract:
1. A backlight module, comprising: a waveguide having a light emitting surface, and an incident surface adjacent to the emitting surface, and a bottom surface opposite to the light emitting surface; a reflective film arranged closely to the bottom surface of the waveguide; a heat dissipating frame including a carrying portion, and sidewall extending toward a light emitting direction from edges of the carrying portion, the carrying portion abutting toward the reflective film, and the carrying portion further defining a plurality of openings located at an area adjacent to the sidewall, the sidewall being arranged adjacent to the incident surface of the waveguide; a power supply printed circuit board disposed on the sidewall facing the incident surface of the waveguide; a plurality of light sources alternatively arranged onto the power supply printed circuit board and facing toward the incident surface of the waveguide, a space between two adjacent light sources being aligning to the opening of the carrying portion such that each of the light sources is offset with respect to the opening; a backframe including a bottom board abutting against the carrying portion, and a plurality of erections alternately arranged and extending from edges of the bottom board, each of the erections extending through the openings of the carrying portion, and the bottom board abutting the carrying portion; and wherein the overall thickness of the erections is larger than the thickness of the light sources such that when the expansion of the waveguide when exposed to heat, the erections can prevent the waveguide from in contact with the light sources.