Patent ID: 7445371

Claim:
A backlight module comprising: a light guide plate comprising: a top surface from which light beams emit from the light guide plate; a bottom surface; two side surfaces between the top surface and the bottom surface, the side surfaces being at opposite sides of the light guide plate; and a first ear and a second ear respectively extending from the two side surfaces, the second ear being dimensioned less than the first ear as measured along a direction perpendicular to the top surface; and a frame receiving the light guide plate, the frame comprising: a first side wall with an opening defined therein, the opening configured for allowing the light guide plate to be inserted into the frame therethrough; a second side wall and a third side wall respectively connected with the first side wall; a first sliding guide defined at an inner side of a portion of the frame that is adjacent to the second side wall, and configured for allowing the first ear to slide there in; and a second sliding guide defined at an inner side of a portion of the frame that is adjacent to the third side wall, and configured for allowing the second ear to slide therein, the first sliding guide and the second sliding guide supporting the two opposite sides of the light guide plate and communicating with the opening; wherein the opening adjacent to the second sliding guide is dimensioned less than the opening adjacent to the first sliding guide as measured along the direction perpendicular to the top surface such that the frame at the opening adjacent to the second sliding guide blocks the first ear from passing through the opening.