Patent ID: 7517134

Claim:
A backlight unit comprising: a frame, which comprises a top wall, a bottom wall opposite to the top wall, two opposite side walls, at least one protuberance formed on the top wall; at least one optical film, which includes at least one through-hole with respect to the at least one protuberance; at least one buffer element disposed between the at least one protuberance and the at least one through-hole; and at least one light source accommodated in the frame, wherein the at least one protuberance drills through the at least one through-hole and is configured to hang the at least one optical film on the frame, wherein the at least one through-hole includes at least one inner surface, the at least one buffer element includes at least one outer surface, wherein the at least one inner surface of the at least one through-hole contacts the at least one outer surface of the at least one buffer element.