Patent ID: 8049682

Claim:
A plasma display device comprising a plasma display panel (PDP) and a driving unit for generating driving signals for driving the PDP, wherein the driving unit comprises an energy recovery circuit comprising at least one inductor, a first switch, and a second switch, wherein a period in which sustain signals are supplied to the PDP comprises a first period in which energy is supplied from the inductor to the PDP and the first switch is turned off, a second period in which the first switch is turned on so that a sustain voltage is supplied to the PDP, a third period in which energy is recovered from the PDP to the inductor and the second switch is turned off, and a fourth period in which the second switch is turned on to supply the reference voltage to the PDP, wherein a length of the first period is shorter than a length of the third period, and wherein the first switch is turned on at a point of time before a magnitude of current that flows through the inductor reaches a maximum value and then, becomes 0 in the first period.