Method of driving plasma display apparatus

A method of driving a plasma display apparatus including a scan electrode and a sustain electrode that are positioned parallel to each other, the method comprising:

• supplying a first reset signal to the scan electrode during a reset period of a first subfield among a plurality of subfields of a frame, the first reset signal including a rising signal with a gradually rising voltage and a falling signal with a gradually falling voltage;
• supplying a scan signal to the scan electrode during an address period of the first subfield;
• supplying a first projection signal to the sustain electrode, the first projection signal being overlapped with the rising signal of the first reset signal;
• supplying a second reset signal to the scan electrode during a reset period of a second subfield immediately following the first subfield, the second reset signal including a first sub reset signal and a second sub reset signal supplied consecutively and each of the first sub reset signal and the second sub reset signal including a rising signal with a gradually rising voltage and a falling signal with a gradually falling voltage;
• supplying a second projection signal to the sustain electrode, the second projection signal being overlapped with the rising signal of the first sub reset signal of the second reset signal;
• supplying a first signal between the scan signal of the first subfield and the second reset signal to the scan electrode;
• supplying a second signal during the second subfield overlapping the first signal to the sustain electrode to generate an erase discharge between the scan electrode and the sustain electrode, a pulse width of the second signal being smaller than a pulse width of the first signal;
• supplying a first sustain bias signal to the sustain electrode during the address period of the first subfield;
• and
• supplying a bias voltage to the sustain electrode during the reset period of the second subfield, the bias voltage being overlapped with the falling signal of the first sub reset signal of the second reset signal,
• wherein a time-gap is disposed between the first sustain bias signal and the first projection signal,
• wherein a time-gap is disposed between the second projection signal and the bias voltage,
• wherein a peak voltage of either the first projection signal or the second projection signal is smaller than a peak voltage of the second signal,
• wherein the first and second signals have a positive polarity, and
• wherein each of the first projection signal and the second projection signal includes a rising signal gradually rising from a ground voltage (GND) to the peak voltage and a falling signal from the peak voltage to the ground voltage (GND).