Patent ID: 7241041

Claim:
A backlight module, comprising: a frame, comprising: first, second, and third frame members forming a polygonal accommodating area, wherein the inner side of the first frame member has at least two recesses projecting therein and facing the polygonal accommodating area, and the second and third members have at least two indentations, respectively, at least part of the at least two indentations having two portions connected to each other, one portion of at least part of the at least two indentations formed in part of the upper side of the third frame member and in part of the inner side of the third frame member, the other portion of at least part of the at least two indentations formed in the inner side of the third member and projecting therein; and an optical film, having a first side with a first positioning flange and a second positioning flange, a second side with a third positioning flange, and a third side with a fourth positioning flange, edges of the frame members configuring the at least two recesses and indentations, oriented to oppositely abut against the contact edges of the flanges of the optical film to hold the optical film in the frame.