An Improved Dual-Path Energy Recovery Circuit Using a Current Source and a Voltage Source for High-Resolution and Large-Sized Plasma Display Panel

An improved dual-path energy recovery circuit (ERC) using a current source and a voltage source for plasma display panel (PDP) is proposed. The proposed ERC uses the voltage source to charge a panel and the current source to discharge the panel. Thus, the proposed circuit can make the panel charge to a sustaining voltage V_S and fully discharge to 0 V, and it is possible to achieve zero-voltage switching for all switches in an H-bridge inverter and zero-current switching for all switches in the ERC. Moreover, it has less conduction and switching loss in ERC devices by the dual energy recovery paths for charging and discharging the panel. Furthermore, it has the features of canceling the gas discharge current, high performance, and the low-cost ERC components. The operation principle and features of the proposed ERC are presented in detail and verified with 42-in standard definition (SD) PDP.