Patent ID: 7950815

Claim:
A back light unit comprising: a bottom cover; a plurality of light source modules mounted on the bottom cover; and an optical sheet unit provided above the light source modules; wherein each of the light source module includes: a PCB (Printed Circuit Board) having a plurality of LED (Light Emitting Diode) light sources mounted thereon, a diffusing plate spaced a distance from the LED light sources and surrounding the PCB, wherein the diffusing plate diffuses a light incident thereon from the LED light sources throughout a surface thereof uniformly, and a diffusing plate supporter that secures the diffusing plate to the PCB, wherein the diffusing plate includes: a flat plate portion, a side wall portion extended from opposite edges of the plate portion to the diffusing plate supporter, and a plurality of light diffusing units formed on an inner surface of the flat plate portion at a position matched to the plurality of the LED light source; wherein each diffusing unit faces each LED light source; wherein each diffusing unit is projected from the inner surface towards each LED light source.