Patent ID: 8172418

Claim:
A frame structure for a backlight module, comprising: a frame body having an inner edge, an end edge, and an outer edge connecting to the end edge and corresponding to the inner edge; and a plurality of fixing structures respectively disposed on two opposite sides of the frame body, wherein each of the fixing structures comprises: a first protrusion and a second protrusion, wherein one end of the first protrusion or one end of the second protrusion connect to the inner edge and the end edge to form a containing cavity, an opening is located between the other end of the first protrusion and the other end of the second protrusion, a length of the first protrusion is L 1 , and a length of the second protrusion is L 2 ; and a stopper portion located in the containing cavity and disposed in parallel to the first protrusion and the second protrusion, wherein the stopper portion partially overlaps or aligns with the first protrusion and the second protrusion along the direction of the end edge respectively, an overlap length between the stopper portion and the first protrusion is α, an overlap length between the stopper portion and the second protrusion is β, wherein the overlap lengths α and β are defined as: L 1 >α≧( h a / H a )× L 1 L 2 >β≧( h b / H b )× L 2 wherein H a is a distance between the outer edge of the frame body and the first protrusion, H b is a distance between the outer of the frame body and the second protrusion, and h a is a distance between the first protrusion and the stopper portion, h b is a distance between the second protrusion and the stopper portion.