 switches 000 to 000. One terminal of the switch 000 is supplied with the sustaining voltage Vs and another terminal of the switch 000 is connected to all the sustaining electrodes 00 to 0n of the PDP 0. One terminal of the switch 000 is connected to all the sustaining electrodes 00 to 0n of the PDP 0 and another terminal of the switch 000 is connected to a ground. One terminal of the switch 000 is supplied with the 