Patent ID: 7355350
Filing Date: 2008-04-08
Classification: G09G

Abstract:
1. An apparatus for energy recovery of a plasma display panel which includes: the plasma display panel having front and rear substrates confronting each other, a pair of transparent electrodes provided to a confronting surface of the front substrate, metal electrodes provided to a pair of the transparent electrodes, respectively, a dielectric layer covering both of the transparent electrodes and the metal electrodes, a protective layer coated on the dielectric layer, an address electrode provided to a confronting surface of the rear substrate, a dielectric layer covering the address electrode, a barrier rib formed on the dielectric layer, a discharge cell partitioned by the barrier rib, and a fluorescent layer coated on an inside of the discharge cell; wherein the apparatus includes a panel capacitor; an energy recovery circuit that charges the panel capacitor during a charging period using energy within an inductor before a maximum current value of the inductor is reached, the energy recovery circuit recovering the energy from the panel capacitor during a recovery period, wherein the recovery period is greater than the charging period, the energy recovery circuit supplies the panel capacitor with a clamping voltage enabling a potential of the panel capacitor to be constantly maintained; and a controller to control the energy recovery circuit to supply the clamping voltage to the panel capacitor within a period taken to discharge a current of the inductor to a current level higher than zero from the maximum current value.