Apparatus and driving method of plasma display

A plasma display device comprising:

• a plasma display panel having a plurality of first electrodes, a plurality of second electrodes, and a plurality of third electrodes crossing a direction of the first and second electrodes;
• a power supply including a first power source for generating a first voltage by converting an input voltage;
• a first driving circuit for driving the plurality of first electrodes;
• and
• a controller for generating a control signal for controlling a driving operation of the first driving circuit,
• wherein the first driving circuit includes:
• a first switch having a first end coupled to the first power source for supplying the first voltage and a second end coupled to a first electrode from among the plurality of first electrodes;
• a second switch having a first end coupled to the first electrode;
• a first capacitor having a first end coupled to the first end of the first switch and a second end coupled to the second switch;
• a first diode having an anode coupled to the second end of the first capacitor;
• and
• a first transformer having a primary coil and a secondary coil, a second voltage being applied to the primary coil and the secondary coil having a first end coupled to the first end of the first capacitor and a second end coupled to the second end of the first capacitor,
• wherein the first transformer charges the first capacitor with a third voltage being generated in proportion to the second voltage.

A driving method of a plasma display device having a controller, a plurality of first electrodes, a plurality of second electrodes, and a plurality of third electrodes crossing a direction of the first electrodes and the second electrodes,

• the plasma display device further including:
• a first switch having a first end coupled to a first power source, the first power source supplying a first voltage;
• a second switch having a first end coupled to a second end of the first switch and a second end coupled to a first electrode from among the plurality of first electrodes;
• a third switch having a first end coupled to the first electrode and a second end coupled to a second power, the second power source supplying a second voltage;
• and
• a first capacitor having a first end coupled to a node between the first switch and the second switch and a second end coupled to the second end of the third switch,
• the driving method comprising:
• charging the first capacitor with a third voltage by turning on the second switch and turning off the first switch and the third switch;
• applying the first voltage to the first electrode by turning on the first switch and the second switch and turning off the third switch;
• and
• applying a fourth voltage to the first electrode by turning on the first switch and the third switch and turning off the second switch, the fourth voltage being lower than the first voltage by a magnitude of the third voltage.