Energy recovery apparatus and method for plasma display panel

An energy recovery apparatus in a plasma display panel driving system including an address driving circuit that switches on a charge and discharge sequence of pixels during an address period, the energy recovery apparatus comprising a first switch, a second switch, an energy storage device, a third switch, a first diode, and a second diode,

• the first switch comprising an input terminal connected to a predetermined power supply and an output terminal connected to the address driving circuit,
• the second switch comprising a first terminal connected to the output terminal of the first switch and a second terminal connected to the energy storage device, and switching on or off current discharged from the pixels or energy transmitted through the first switch according to a predetermined sequence,
• the energy storage device connected between the second terminal of the second switch and a first terminal of the third switch,
• the third switch comprising the first terminal connected to the energy storage device and a second terminal connected to ground,
• the first diode being connected between the second terminal of the second switch and ground;
• and
• the second diode connected to the output terminal of the first switch and the first terminal of the third switch.

An energy recovery method for a plasma display panel driving system, comprising:

• supplying a predetermined source voltage to pixels for conduction according to a predetermined switching sequence in a first mode;
• increasing current flow in an energy storage device, while supplying the predetermined source voltage to the pixels, according to a predetermined switching sequence in a second mode;
• recovering energy discharged from the pixels using the energy storage device according to the predetermined switching sequence in a third mode;
• terminating a charge and discharge process of the pixels and sustaining the energy recovered by using the energy storage device according to a predetermined switching sequence in a fourth mode;
• and
• transferring the energy stored in the energy storage device to pixels for conduction according to a predetermined switching sequence in a fifth mode.