Patent ID: 6778153
Filing Date: 2004-08-17
Classification: G09G

Abstract:
A reactive power recovering circuit for use with a plasma display panel including a power supply source and first and second discharge electrodes disposed to perform a surface discharge with a supply voltage from the power supply source, the circuit comprising:a panel capacitor having opposite ends, each end being connected to a corresponding one of the first and second discharge electrodes, said panel capacitor being discharged by alternately supplying a charge voltage to the first and second discharge electrodes; switches to turn on or off a connection between said panel capacitor, the first and second discharge electrodes, and the power supply source; an inductor provided between said panel capacitor and one of the first and second discharge electrodes, said inductor being charged by a discharge current discharged by said panel capacitor and to inductively store the charge voltage to be recovered for use by said panel capacitor using the discharge current; and a controller to control said switches so as to allow the charge voltage of said panel capacitor to be alternately supplied to the first and second discharge electrodes.