Patent ID: 8988629
Filing Date: 2015-03-24
Classification: H05K

Abstract:
1. A flat panel display device, wherein the flat panel display device comprises a backlight system and a display panel, wherein: the backlight system comprises a light source, a light homogenization mechanism, and a back frame; the back frame carries the light source and the light homogenization mechanism, the light homogenization mechanism guiding light from the light source into the display panel; the back frame comprises primary assembling pieces, secondary assembling pieces, and a bracing piece for fixing a circuit board having at least one major surface defining a normal direction, the primary assembling pieces having a number of at least two, at least one of the primary assembling pieces having an end forming joint sections, the secondary assembling pieces being joined to the primary assembling pieces; the at least two primary assembling pieces are joined through corresponding joint sections thereof, at least one of the primary assembling pieces comprising a reinforcement structure formed on the joint sections thereof; and the at least two primary assembling pieces are joined end-to-end to form a periphery of a main frame structure of the back frame and the main frame structure of the back frame is a hollow frame to define an empty room, the at least two primary assembling pieces wholly surrounds the empty room, the light source and the light homogenization mechanism are arranged in the empty room and supported by the periphery of the main frame structure of the back frame, the secondary assembling pieces are arranged in the empty room and joined to the primary assembling pieces to divide the empty room into a plurality of small empty rooms, the bracing piece is mounted to the primary assembling pieces or the secondary assembling pieces or is mounted to both the primary assembling pieces and the secondary assembling pieces; the bracing piece comprises a bracing body, a first suspension section and a second suspension section, a first bearing section and a second bearing section, and a first resilient bent section and a second resilient bent section, the bracing body being mounted to the primary assembling pieces or the secondary assembling pieces or is mounted to both the primary assembling pieces and the secondary assembling pieces, the first suspension section and second suspension section extending from the bracing body to be spaced from and opposing each other so as to define therebetween a receiving space for receiving the circuit board therein in such a way that the first and second suspension sections respectively engage first and second opposite side edges of the circuit board by having the circuit board moved into the space in a predetermined direction substantially parallel to the normal direction of the circuit board, the first bearing section and second bearing section being spaced from the bracing body and respectively extending from the first suspension section and the second suspension section to collectively receive the circuit board to be positioned thereon, the first resilient bent section and the second resilient bent section being respectively located between the first and second bearing sections and the bracing body and being respectively bent from the first and second suspension sections toward each other to define a passage having a size smaller than the receiving space, whereby when the circuit board is moved in the predetermined direction substantially parallel to the normal direction of the circuit board to reach and be positioned on the first and second bearing sections, the first bearing section and the first resilient bent section resiliently clamp the first side edge of the circuit board and the second bearing section and the second resilient bent section resiliently clamp the second side edge of the circuit board so as to clamp the circuit board between the first and second suspension sections of the bracing piece; wherein each of the joint sections of each of the primary assembling pieces has a cross-section that forms the reinforcement structure, the cross-section comprising a projection formed on a surface of one of the primary assembling pieces and a recess formed in an opposite surface of other one of the primary assembling pieces to correspond to the projection, whereby the two primary assembling pieces are positioned with respect to each other in a recess-projection paired form, where the projection of one of the joint sections of the one of the two primary assembling pieces is selectively received in and in snug engagement with the recesses of the joint sections of the other one of the two primary assembling pieces to define different sizes of the back frame.