Patent ID: 7352344

Claim:
A driver circuit comprising: a first switch having a first end coupled to a first voltage source and a second end coupled to an X side of an equivalent capacitor of a plasma display panel; a second switch having a first end coupled to a second voltage source and a second end coupled to a Y side of the equivalent capacitor of the plasma display panel; a third switch having a first end coupled to the second end of the first switch and a second end coupled to ground; a fourth switch having a first end coupled to the second end of the second switch and a second end coupled to ground; and an energy recovery circuit comprising: a first unit, coupled to the X side of the equivalent capacitor, for passing current of charging and/or discharging the equivalent capacitor from the X side; a second unit, coupled to the Y side of the equivalent capacitor, for passing current of charging and/or discharging the equivalent capacitor from the Y side; and a third unit coupled to the first unit, the second unit and ground, the third unit comprising a capacitor, capable of charging and/or discharging the equivalent capacitor from the X side and/or the Y side.