Patent ID: 8153903
Filing Date: 2012-04-10
Classification: H05K

Abstract:
1. An image display apparatus comprising: a frame plate having a fixing plane; a multi-layer printed circuit board supported by the frame plate through a supporting member and disposed in parallel to the fixing plane, the circuit board including a first surface insulation layer facing the fixing plane and a second insulation layer opposite to the first surface insulation layer, an electronic component being mounted on at least one of the first and second insulation layers, the circuit board comprising a switching power supply circuit board for converting an AC power supplied thereto into a DC power; a back cover supported by the frame plate for enclosing the circuit board therein; a display body, receiving the DC power, disposed on a rear side of the frame plate, displaying an image, and wherein the electronic component includes a terminal that penetrates through holes in the multi-layer printed circuit board and protrudes from the first surface insulation layer as a protruding part; and a guard spacer on the first surface insulation layer and electrically insulated from the electric component, comprising a dummy electronic component that is unrelated to an operation of the circuit board; wherein the guard spacer has a predetermined height that is the same as or greater than a height of the protruding part in a thickness direction of the multi-layer printed circuit board and smaller than a gap between the fixing plane and the printed circuit board, defined by the supporting member; and wherein a heat generated by the electronic component is transmitted to the frame plate by convection.