Patent ID: 8616738

Claim:
A back frame of a flat panel display device, which comprises at least two primary assembling pieces and at least one secondary assembling piece, the at least two primary assembling pieces being joined to form a main frame structure of the back frame, the secondary assembling piece being arranged inside the main frame structure and joined to the main frame structure, the back frame further comprising a bracing piece fixed to the primary assembling pieces or the secondary assembling piece and a heat dissipation fin set arranged on the bracing piece, the bracing piece fixing a circuit board and forming a thermal coupling between the circuit board and the heat dissipation fin set; wherein the primary assembling pieces comprise a first primary assembling piece and a second primary assembling piece, the first primary assembling piece having 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.