US 2006/0077133 A1 · Plasma display device and driving method thereof

Abstract

A power recovery circuit for a plasma display device and a driving method for the circuit. An inductor is coupled to form a resonance circuit and to generate a voltage difference between two electrodes of the same type that are coupled to the two terminals of a power recovery circuit. The resulting circuit allows formation of resonance between the two electrodes and power recovery from the panel capacitors formed in a PDP. Instead of hard-switching, the power recovery circuit is also used to maintain the voltage difference at the pre power recovery level after recovering power. As a result, power consumption is reduced when changing the voltage level of the two electrodes from the same voltage level to different voltage levels and vice versa. Further, elements having the same function are combined into a single element to simplify the circuit.

Claims30

Dependent claims

A plasma display device comprising:

a panel including a plurality of first electrodes and second electrodes;
and
a driving circuit for using a first panel capacitor and a second panel capacitor formed respectively at a first electrode and a second electrode to form a charge and discharge path between the first electrode and the second electrode,
wherein the driving circuit includes:
a first inductor having a first terminal coupled to the first electrode;
a first switch coupled between a second terminal of the first inductor and the second electrode for switching a charge path from the first electrode to the second electrode;
a second inductor having a first terminal coupled to the second electrode;
a second switch coupled between a second terminal of the second inductor and the first electrode for switching a charge path from the second electrode to the first electrode;
a third switch coupled between the second terminal of the second inductor and a first power source for supplying a first voltage for switching a charge path from the first power source to the second electrode;
and
a fourth switch coupled between the second terminal of the second inductor and the first power source for switching a path for discharging the second electrode.

8 more elements

A plasma display device driving method for using a driving circuit, a first panel capacitor, and a second panel capacitor, and forming a charge/discharge path between a first electrode and a second electrode, the driving circuit including a first inductor having a first terminal coupled to the first electrode and a second inductor having a first terminal coupled to the second electrode, the first panel capacitor being formed at the first electrode, and the second panel capacitor being formed at the second electrode, the method comprising:

turning on a first switch coupled to a second terminal of the second inductor in an early stage of a sustain period, and changing voltage levels of the first electrode and the second electrode from a same voltage level to different voltage levels;
and
alternately turning on a second switch coupled between a second terminal of the first inductor and the second electrode and a third switch coupled between a second terminal of the second inductor and the first electrode, and forming a charge/discharge path between the first electrode and second electrodes.

A power recovery circuit for a plasma display panel, the panel including groups of electrodes of a first type and groups of electrodes of a second type, panel capacitors formed between electrodes of the first type and the electrodes of the second type, the panel being driven during frames of time, each frame being divided into periods including a sustain period when a sustained discharge between the electrodes of the first type and the electrodes of the second type displays an image, the power recovery circuit comprising:

a first switch coupling a first group of electrodes of the first type to a positive sustain voltage;
a second switch coupling a second group of electrodes of the first type to a negative sustain voltage;
an inductor circuit coupled in series between the first group of electrodes of the first type and the second group of electrodes of the first type;
and
a connector voltage circuit coupling the inductor circuits to a connector voltage higher than the negative sustain voltage and lower than the positive sustain voltage,
wherein the connector voltage circuit establishes a resonance in the inductor circuit between the first group of electrodes of the first type and the second group of electrodes of the first type by differentiating a voltage at the first group of electrodes of the first type from a voltage at the second group of electrodes of the first type during a start period of the sustain period, and
wherein the connector voltage circuit brings the voltage at the first group of electrodes of the first type and the voltage at the second group of electrodes of the first type back to a same level at completion of the sustain period.

4 more elements

Dependencies are inferred from the claim text.

Plasma display device and driving method thereof

Life of this patent

Plasma display device and driving method thereof

Life of this patent

Abstract

Claims30