US 2003/0173905 A1 · PDP driving device and method

Abstract

In a PDP driving circuit, first and second inductors are coupled to a panel capacitor. The driving circuit stores a first energy in the first inductor through a current in the first direction while the voltage at the panel capacitor is maintained to be a first voltage, and uses the first energy and resonance between the panel capacitor and the first inductor to reduce the voltage at the panel capacitor to a second voltage. Next, the driving circuit maintains the voltage at the panel capacitor to be the second voltage, recovers the energy remaining in the first inductor, stores a second energy in a second inductor through a current in the second direction, and uses the energy stored in the second inductor to increase the voltage at the panel capacitor to the first voltage. Therefore, rising and falling time of the voltage at the panel capacitor is shortened, and zero-voltage switching is possible when the driving circuit has a parasitic component.

Claims25

Dependent claims

A device for driving a plasma display panel having a plurality of address electrodes, scan electrodes, sustain electrodes, and panel capacitors each formed between the address, scan, and sustain electrodes, comprising:

first and second capacitors coupled in series between first and second power sources for respectively providing first and second voltages;
first and second switches coupled in parallel to a point where the first and second capacitors meet;
third and fourth switches coupled in series between the first and second power sources, a point where the third and fourth switches meet being coupled to the panel capacitor;
and
first and second inductors respectively coupled between the first switch and a point where the third and fourth switches meet, and between the second switch and the point where the third and fourth switches meet.

2 more elements

a discharge unit, including a first inductor coupled to the panel capacitor, for storing a first energy in the first inductor using current in a first direction while the voltage at the panel capacitor maintains a first voltage, using the first energy and the resonance between the panel capacitor and the first inductor to reduce the voltage at the panel capacitor to a second voltage, and recovering the energy remaining in the first inductor while maintaining the voltage at the panel capacitor to be the second voltage;
and
a charge unit, including a second inductor coupled to the panel capacitor, for storing a second energy in the second inductor using current in a second direction while the voltage at the panel capacitor maintains the second voltage, using the second energy and the resonance between the panel capacitor and the second inductor to raise the voltage at the panel capacitor to the first voltage, and recovering the energy remaining in the second inductor while maintaining the voltage at the panel capacitor to be the first voltage.

first and second inductors coupled to the panel capacitor;
first and second signal lines for respectively transmitting first and second voltages;
a capacitor for charging a third voltage;
a first current path formed between the first signal line and the capacitor so that a current in the first direction is supplied to the first inductor to store a first energy, while the voltage at the panel capacitor is maintained to be the first voltage;
a second current path for generating resonance between the first inductor and the panel capacitor, and using the first energy and the resonance to reduce the voltage at the panel capacitor to a second voltage, while the first energy is stored in the first inductor;
a third current path for recovering the energy remaining in the first inductor while the voltage at the panel capacitor is changed to the second voltage;
a fourth current path formed between the capacitor and the second signal line so that a current in the second direction opposite the first direction may be supplied to the second inductor to store a second energy, while the voltage at the panel capacitor is maintained to be the second voltage;
a fifth current path for generating resonance between the second inductor and the panel capacitor, and using the second energy and the resonance to increase the voltage at the panel capacitor to the first voltage, while the second energy is stored in the second inductor;
and
a sixth current path for recovering the energy remaining in the second inductor while the voltage at the panel capacitor is changed to the first voltage.

7 more elements

an inductor coupled to the panel capacitor;
first and second signal lines for transmitting first and second voltages;
a first current path formed between the first and the second signal lines so that current may be supplied to the inductor to store a first energy, while the voltage at the panel capacitor is maintained to be the first voltage;
a second current path for generating resonance between the inductor and the panel capacitor while the first energy is stored in the inductor, and using the first energy and the resonance to reduce the voltage at the panel capacitor to a second voltage;
at least one third current path for freewheeling tcurrent flowing to the inductor so as to maintain the second energy remaining in the inductor, while the voltage at the panel capacitor is changed to the second voltage;
a fourth current path for generating resonance between the inductor and the panel capacitor while current flowing to the inductor is freewheeled, and using the second energy and the resonance to increase the voltage at the panel capacitor to the first voltage;
and
a fifth current path for recovering the energy remaining in the inductor while the voltage at the panel capacitor is changed to the first voltage.

5 more elements

A method for driving a plasma display panel having a plurality of address electrodes, scan electrodes, sustain electrodes, and panel capacitors each formed between the address, scan, and sustain electrodes, comprising:

(a) supplying a current in the first direction to a first inductor coupled to the panel capacitor to store a first energy while the voltage at the capacitor is maintained to be a first voltage;
(b) using the first energy and resonance between the panel capacitor and the first inductor to change the voltage at the panel capacitor to a second voltage;
(c) freewheeling current flowing to the first inductor through resonance to store a second energy in the first inductor, or recovering the energy stored in the first inductor, supplying current in the second direction opposite the first direction to a second inductor coupled to the panel capacitor to store a second energy, and maintaining the voltage at the panel capacitor to be the second voltage;
(d) using the second energy and resonance between the panel capacitor and one of the first and the second inductors to change the voltage at the panel capacitor to the first voltage;
and
(e) maintaining the voltage at the panel capacitor to be the first voltage and recovering the energy remaining in the one of the first and the second inductors.

3 more elements

Dependencies are inferred from the claim text.

PDP driving device and method

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PDP driving device and method

Life of this patent

Abstract

Claims25