Patent ID: 8821004

Claim:
A flat panel display device, comprising a display panel and a backlight system comprising a light source, a light homogenization mechanism, and a back frame; wherein the back frame carries the light source and the light homogenization mechanism and the back frame comprises at least first and second primary assembling pieces, wherein the first primary assembling piece has an end forming at least two joint sections, each of the joint sections having a structure mating an end of the second primary assembling piece, the first primary assembling piece using one of the joint sections to join the corresponding end of the second primary assembling piece such that the corresponding end of the second primary assembling piece is selectively mounted to one of the joint sections of the first primary assembling piece, and other joint sections of the first primary assembling piece are idle, the first and second primary assembling pieces being joined to form a main frame structure of the back frame, the back frame further comprising secondary assembling pieces that are arranged inside the main frame structure, the secondary assembling pieces being joined to the main frame structure, at least one of the primary assembling pieces and the secondary assembling pieces forming bumps, the bumps being arranged to receive the light homogenization mechanism to be positioned thereon and supported thereby.