Patent ID: 7064732

Claim:
A method of controlling a circuit arrangement for an AC power supply of a plasma display panel in which the circuit arrangement includes at least a transistor bridge that includes bridge transistors T 1 , T 2 , T 3 , T 4 , an input voltage U 0 , a capacitor Cp of a plasma cell and a charging circuit in the form of an auxiliary voltage Uh, a first auxiliary transistor T 11 and a first coil L 1 , the method comprising: performing a chagring operation to charge capacitor Cp by: controlling the first auxiliary transistor T 11 as conductive at a beginning of the charging operation, controlling the bridge transistor T 2 as conductive for a delay time tv, which is greater than zero, to inhibit charging of the capacitor Cp, and controlling the bridge transistor T 2 non-conductive after the delay time tv has elapsed, to effect the charging of the capacitor Cp.