Patent ID: 7708451

Claim:
A backlight assembly for liquid crystal display device, comprising: a bottom frame including: a bottom surface; four side surfaces attached to the bottom surface, the four side surfaces together with the bottom surface define a space; first and second of holes in two of the four side surfaces, the first and second holes opposite to each other in two opposite side surfaces; and affixing structures at the bottom surface and spaced apart from each other; and printed circuit boards on the bottom frame and spaced apart from each other, each of the printed circuit boards having a stripe shape and ends of the printed circuit boards inserted into the first and second holes in the two opposite side surfaces; a plurality of light emitting diode lamps on each of the printed circuit boards; and a reflecting sheet covering the bottom surface and the printed circuit boards, the reflecting sheet having a plurality of through-holes corresponding to the light emitting diode lamps, wherein a width of each of the printed circuit boards substantially corresponds to a distance between two adjacent affixing structures, wherein the affixing structures and the printed circuit boards form a flat top surface, wherein a size of each of the first and second holes is smaller than a size of each of the two opposite side surfaces, and wherein a circumference of each of the first and second holes is completely surrounded by the two opposite side surfaces.