Patent ID: 8687142

Claim:
A backlight unit comprising: a light emitting diode (LED) package including one or more LED chips; a light source PCB mounting one side of a bottom of the LED package or both sides of the bottom of the LED package; a bottom cover supporting the light source PCB under the light source PCB, wherein the bottom cover includes an embossing portion which protrudes toward the LED package, wherein an entire width of the embossing portion is overlapped with a portion of the bottom of the LED package which is not mounted on the light source PCB; and a heat emission material filling between the bottom of the LED package and the embossing portion, wherein the embossing portion is made of metals, a heat emitted from the LED package is transferred to the embossing portion of the bottom cover via the heat emission material, and a distance between the LED package and the embossing portion is shorter than a distance between the LED package and the bottom cover except the embossing portion.