Patent ID: 8421788

Claim:
A power supply circuit for an image display apparatus having a plasma display panel, adapted to suppress leakage of electromagnetic waves generated in the plasma display panel to the outside of the image display apparatus, the power supply circuit comprising: an AC inlet to which a power cord is connected to take in AC power supplied from an external AC power supply; a filter circuit which includes an inductance element and is adapted to attenuate electromagnetic waves and supplied with the AC power through the AC inlet; a mechanical switch which is connected to the filter circuit and includes a moving element that moves according to a user's operation and switches on/off the AC power supplied from the filter circuit; and a single circuit board on which the filter circuit is formed and the AC inlet and the mechanical switch are mounted; wherein: when the mechanical switch switches on the AC power, the AC power is supplied to a power supply unit that is connected to the power supply circuit through the mechanical switch and the plasma display panel is driven, and the electromagnetic waves generated in the plasma display panel are transmitted to the filter circuit through the power supply unit and attenuated in the filter circuit; and the power supply circuit is independently covered or surrounded by a shielding member and shielded from leaking the electromagnetic waves to the outside of the power supply circuit when the plasma display panel is driven.