Panel display device, back frame and manufacturing of back frame

A manufacturing method for a back frame of a panel display device, which comprises:

• manufacturing at least a first main splicing element and a second main splicing element, a surface on one end of the first main splicing element being disposed with two splicing parts laid out along a length direction of the first main splicing element with a separating space, and the splicing parts of the first main splicing element matching one end of the second main splicing element;
• wherein at least one of the first or the second main splicing elements being disposed with a light source and the material for the main splicing element disposed with the light source being aluminum extrusion;
• wherein the main splicing element made of aluminum extrusion comprising a side wall bent upward and a reverse L-shaped for-processing block formed by extending from another surface of the side wall away from the light source, milling off an inner part of the reverse L-shaped for-processing block near lower end to form the main splicing element having a hook to be disposed with the light source, the light source being disposed on a surface of the side wall bent upward for light source disposition, one or more remaining main splicing elements not for disposing light source being made of galvanized steel;
• and
• the first main splicing element splicing with the second main splicing element through the splicing parts to form a main frame of the back frame.