Plasma display device and driving method of plasma display panel

A plasma display device comprising:

• a plasma display panel having a plurality of discharge cells including a display electrode pair that is formed of a scan electrode and a sustain electrode;
• and
• a sustain pulse generating circuit including:
• an electric power recovering circuit for raising or falling a sustain pulse by resonating an inductor and inter-electrode capacity of the display electrode pair;
• and
• a clamping circuit for clamping voltage of the sustain pulse on a predetermined voltage,
• generating as many sustain pulses as the number corresponding to luminance weight in a sustain period in a plurality of subfields disposed in one field period, and applying each sustain pulse to each display electrode pair,
• wherein the sustain pulse generating circuit generates a second sustain pulse in a period after a first sustain pulse and before an erasing pulse, the first sustain pulse occurring at the beginning of the sustain period, the second sustain pulse being steeper than the rising gradient of the first sustain pulse, and
• wherein the sustain pulse generating circuit changes rising gradient of the second sustain pulse in response to light emitting rate of the plasma display panel in the sustain period.