Importance

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Abstract

The present invention provides a flat panel display device, a stereoscopic display device, and a liquid crystal display device. The flat panel display device includes a backlight system and a display panel, wherein the backlight system includes a light source, a light homogenization mechanism, and a back frame; the back frame carries the light source and the light homogenization mechanism and includes at least two primary assembling pieces and at least one secondary assembling piece, wherein the at least two primary assembling pieces are joined to form a main frame structure of the back frame and the secondary assembling piece is arranged inside the main frame structure and is joined to the main frame structure. The back frame further includes 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 fixes a circuit board and forms a thermal coupling between the circuit board and the heat dissipation fin set. With the above arrangement, the present invention forms a back frame through joining so as to make the structure of the back frame simple, save the material for the back frame, and lower down the manufacturing cost. Further, a bracing piece of the heat dissipation fin set is used to fix the circuit board so that heat dissipation efficiency of the circuit board is improved.

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First Claim