Patent ID: 6933679

Claim:
An apparatus for driving a plasma display panel, which is for applying a driving voltage to a panel capacitor formed between first and second electrodes, the apparatus comprising: a first switch and a second switch coupled in series between the first power source for supplying a first voltage and a first terminal of the panel capacitor, the first switch and a second switch having a first capacitor and a second capacitor formed between both terminals thereof, respectively; a third switch and a fourth switch coupled in series between the first terminal of the panel capacitor and the second power source for supplying a second voltage, the second voltage being a voltage lower than the first voltage, the third switch and a fourth switch having a third capacitor and a fourth capacitor formed between both terminals thereof, respectively; a first diode coupled in a backward direction between a contact of the first switch and the second switch and a third power source for supplying a third voltage, the third voltage being a voltage between the first and second voltages; and a second diode coupled in a forward direction between a contact of the third switch and the fourth switch and the third power source, wherein: the first voltage and the second voltage being alternately applied to the first terminal of the panel capacitor when the first switch and the second switch, and the third switch and the fourth switch are alternately turned on, and the first capacitor has a lower capacitance than the second capacitor, and the third capacitor having a higher capacitance than the fourth capacitor.