Apparatus and method for driving plasma display panel
AssigneeSamsung SDI Co., Ltd.
InventorHak-Ki Choi
Life of this patent
Estimating the term…
Abstract
In a PDP driver, a sustain part includes first and second switches serially coupled between first and second voltages, and third and fourth switches serially coupled between the first and second voltages. A coupling node of the first and second switches is coupled to one end of the panel capacitor, and a coupling node of the third and fourth switches is coupled to the other end thereof. A charging/discharging part includes an inductor, one end of which is coupled to the coupling node of the first and second switches and the coupling node of the third and fourth switches through first and second paths, and an external capacitor coupled between the other end of the inductor and the second voltage through third and fourth paths.
Claims12
An apparatus for driving a plasma display panel having a plurality of scan electrodes and common electrodes arranged in pairs, and a panel capacitor formed between each scan electrode and common electrode, the apparatus comprising:
- a sustain part including a first swich and a second switch that are each coupled in series between a first voltage and a second voltage, and a third switch and a fourth switch that are each coupled in series between the first voltage and the second voltage, a coupling node of the first switch and a coupling node of the second switch being each coupled to one end of the panel capacitor, a coupling node of the third switch and a coupling node of the fourth switch being each coupled to the other end of the panel capacitor, the sustain part maintaining a voltage of the one end of the panel capacitor and a voltage of the other end of the panel capacitor at the first voltage or the second voltage;
- and
- a charging/discharging part including an inductor with one inductor end coupled to the coupling node of the first switch and the coupling node of the second switch through a first path and to the coupling node of the third switch and the coupling node of the fourth switch through a second path, and an external capacitor coupled between the other end of the inductor and the second voltage through a third path and a fourth path, the charging/discharging part charging the voltage of one end of the panel capacitor and the voltage of the other end thereof with the first voltage or discharging the voltage of the one end of the panel capacitor and the voltage of the other end of the panel capacitor to the second voltage.
A method for driving a plasma display panel having a panel capacitor with both ends supplied with a first voltage and a second voltage alternately, and having an external capacitor supplied with a voltage corresponding to a middle level between the first voltage and the second voltage, and an inductor coupled to the external capacitor, the method comprising:
- (a) charging a voltage of one end of the panel capacitor up to the first voltage using resonance that is generated when the inductor is coupled to one end of the panel capacitor through a first path;
- (b) discharging a voltage of one end of the panel capacitor to the second voltage using resonance that occurs when the inductor is coupled to one end of the panel capacitor through the first path;
- (c) charging a voltage of the other end of the panel capacitor up to the first voltage using resonance that is generated when the inductor is coupled to the other end of the panel capacitor through a second path;
- and
- (d) discharging the voltage of the other end of the panel capacitor to the second voltage using resonance generated when the inductor is coupled to the other end of the panel capacitor through the second path.
An apparatus for driving a plasma display panel including a first electrode and a second electrode, and a panel capacitor formed between the first electrode and the second electrode, the apparatus comprising:
- a power source supplying a first voltage;
- an inductor;
- a first current path formed from the power source to the first electrode via the inductor to generate a resonance between the panel capacitor and the inductor, thereby changing the voltage of the first electrode to a second voltage, while the voltage of the second electrode is maintained to a third voltage;
- a second current path formed from the first electrode to the power source via the inductor to generate a resonance between the panel capacitor and the inductor, thereby changing the voltage of the first electrode to the third voltage, while the voltage of the second electrode is maintained to the third voltage;
- a third current path formed from the power source to the second electrode via the inductor to generate a resonance between the panel capacitor and the inductor, thereby changing the voltage of the second electrode to the second voltage, while the voltage of the first electrode is maintained to the third voltage;
- and
- a fourth current path formed from the second electrode to the power source via the inductor to generate a resonance between the panel capacitor and the inductor, thereby changing the voltage of the second electrode to the third voltage, while the voltage of the first electrode is maintained to the third voltage.
Dependencies are inferred from the claim text.