A Cost-Effective Sustain Power Conversion Scheme for Plasma Display Panels

This paper presents a cost-effective sustain power conversion scheme for the plasma display panel (PDP). A new energy-recovery (ER) circuit is proposed for a low-cost sustain driver. As a parallel-resonant type ER circuit, it can recover the energy stored in the PDP without the interconnection of the sustaining and scanning electrodes. It has a simple structure and fewer power devices, providing a lower cost of production. In addition, a high efficiency sustain power supply is proposed to provide a constant sustain voltage for the sustain driver. It achieves zero-current turn-off of the output diode, alleviating the diode reverse-recovery problems. The sustain power efficiency is increased by reducing the switching power loss. Therefore, the cost and power consumption of the PDP can be improved. The proposed circuits are theoretically analyzed in detail. The experimental results based on a 32-in PDP are presented to confirm the validity of the proposed circuits.