Patent ID: 7196680

Claim:
A drive method for improving contrast of a plasma display panel having a first electrode, a second electrode, and a panel capacitor formed between the first electrode and the second electrode, with a driving field of the plasma display panel being divided into a plurality of sub-fields each sub-field including a reset interval, an address interval, and a sustain discharge interval, the method comprising: during a reset interval of a first sub-field, applying a first set of predetermined voltages to the first electrode and to the second electrode to develop a first discharge voltage between the first electrode and the second electrode; and during a reset interval of a second sub-field, in response to the second sub-field exhibiting a higher gray than the first sub-field, applying a second set of predetermined voltages to the first electrode and to the second electrode to develop a second discharge voltage between the first electrode and the second electrode, the second discharge voltage being greater than the first discharge voltage.