Apparatus and method for driving plasma display panel
AssigneeSamsung SDI Co., Ltd.
InventorsJoo-Yul Lee, Tae-Hyun Kim
Life of this patent
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Abstract
An apparatus and method for driving a plasma display panel. In an idle period, a lowest voltage is applied to each circuit of a driving board of a plasma display panel so that a bootstrap capacitor of a switch driving circuit may enter a chargeable state. Therefore, it is possible not only to make the capacity of the bootstrap capacitor of each circuit small, but also to effectively prevent an abnormal discharge or an abnormal operation of each circuit when an abnormal image is inputted.
Claims11
A method for driving a plasma display panel including a plurality of first electrodes, a plurality of second electrodes, a plurality of third electrodes crossing the first electrodes and the second electrodes, and discharge cells formed by the first electrodes, the second electrodes, and the third electrodes, wherein a frame is divided into a plurality of subfields, and a subfield comprises a reset period, an address period, and a sustain period, wherein a discharge cell is selected by applying a pulse to a first electrode in the address period, the method comprising:
- in an idle period, applying, to the first electrode, a lowest voltage applied to the first electrode in the reset period or the address period, the lowest voltage being applied and having a constant non-zero value for the entire idle period,
- wherein the idle period is the entire period extending from an end of a first frame to a start of a second frame immediately subsequent to the first frame.
An apparatus for driving a plasma display panel by applying voltages to a first electrode and a second electrode, wherein a frame is divided into a plurality of subfields, and a subfield comprises a reset period, an address period, and a sustain period, comprising:
- a first sustain driver for applying a sustain discharge voltage to the first electrode;
- a scan unit for selectively applying a first voltage supplied from a first voltage source and a second voltage supplied from a second voltage source to the first electrode;
- a first switch coupled between the first voltage source and the second voltage source;
- a main current path coupled to the first electrode through the scan unit;
- a second switch coupled between the main current path and a third voltage source that supplies a third voltage for a sustain discharge;
- and
- a third switch coupled between the main current path and a fourth voltage source that supplies a fourth voltage,
- wherein the second voltage is lower than the first voltage;
- and
- wherein, in an idle period, the first switch is turned on to apply the second voltage to the first electrode, the second voltage being applied to the first electrode and having a constant non-zero value for the entire idle period,
- wherein the idle period is the entire period extending from an end of a first frame to a start of a second frame immediately subsequent to the first frame.
An apparatus for driving a plasma display panel by applying voltages to a first electrode and a second electrode, wherein a frame is divided into a plurality of subfields, and a subfield comprises a reset period, an address period, and a sustain period, comprising:
- a first sustain driver for applying a sustain discharge voltage to the first electrode;
- a scan unit for selectively applying a scan voltage to the first electrode;
- and
- a second sustain driver including:
- a first switch coupled between the second electrode and a first voltage source that supplies a first voltage, and
- a second switch coupled between the second electrode and a second voltage source that supplies a second voltage,
- wherein the first voltage is a voltage for a sustain discharge;
- and
- wherein, in an idle period, the second switch is turned on to apply the second voltage to the second electrode, wherein a lowest voltage applied to the first electrode in the reset period or the address period is applied and has a constant non-zero value for the entire idle period,
- wherein the idle period is the entire period extending from an end of a first frame to a start of a second frame immediately subsequent to the first frame.
Dependencies are inferred from the claim text.