Patent ID: 7605808

Claim:
An energy recovery apparatus for a plasma display panel having a plurality of first and second electrodes and a panel capacitance, comprising: a voltage source configured to supply a sustain voltage; a first charging circuit configured to form a first charging path between first and second nodes of the panel capacitance, the first charging circuit having a first inductor; a second charging circuit configured to form a second charging path between first and second nodes of the panel capacitance, the second charging circuit having a second inductor; a first power circuit configured to form the first charging path with the first charging circuit from the second node to the first node of the panel capacitance such that a potential of the first node is substantially raised to the sustain voltage; a second power circuit configured to form the second charging path with the second charging circuit from the first node to the second node of the panel capacitance such that a potential of the second node is substantially raised to the sustain voltage, the first power circuit is further configured to clamp one of the first or second nodes to the sustain voltage when the potential of one of the first and second nodes substantially reaches the sustain voltage, and the second power circuit is configure to clamp one of (1) the first node to a prescribed voltage when the second node is clamped to the sustain voltage or (2) the second node to the prescribed voltage when the first node is clamped to the sustain voltage, wherein the first charging circuit is coupled in parallel across nodes of the first power circuit and wherein the second charging circuit is coupled in parallel across nodes of the second power circuit.