US Patent 7355569 Driving circuit of a plasma display panel

A driving circuit of a plasma display panel utilizes only one energy recovery unit for both sides of the panel capacitor. The driving circuit includes a panel capacitor having an X-side and a Y-side, a voltage clamping circuit and an energy recovery unit. The voltage clamping circuit includes four switches and is provided in parallel with the panel capacitor of the plasma display panel. The energy recovery unit is coupled between the X-side of the panel capacitor and the Y-side of the panel capacitor for charging and discharging the panel capacitor.