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US 6,784,857 B1Granted
Method of driving a sustaining pulse for a plasma display panel and a driver circuit for driving a plasma display panel
AssigneeNEC Corporation
InventorTadashi Nakamura
Life of this patent
Estimating the term…
Abstract
The first present invention provides a method of driving a sustaining pulse for a plasma display panel, wherein sustaining pulses are generated, which comprise plural sustaining discharge current supply pulses having different achieving voltage levels from each other and slope pulses, so that, after the slope pulses are generated and outputted, the sustaining discharge current supply pulses having the different achieving voltage levels are applied in sequence of a magnitude of difference between the different achieving voltage levels and a potential of a final one of the sustaining discharge current supply pulses.
Claims19
A method of driving a sustaining pulse for a plasma display panel, the method including the steps of:
- applying a sustaining discharge for each sustaining pulse;
- causing a step-by-step increase in current supplying ability of each said sustaining discharge over at least three steps;
- and
- controlling respective sustaining periods for each step-by-step increase in said current supplying ability,
- wherein said controlling step is accomplished so that a time between a next to last step and a last step of said at least three steps is in the range of 100 nanoseconds to 300 nanoseconds.
2 more elements
A circuit for driving sustaining pulses for a plasma display panel, said circuit comprising:
- a first sustaining discharge supply circuit for setting potentials of sustaining electrodes at a first sustaining discharge potential;
- a second sustaining discharge supply circuit for setting potentials of scanning electrodes at a second sustaining discharge potential which is higher than said first sustaining discharge potential;
- a third sustaining discharge supply circuit for setting said potentials of said sustaining electrodes at a third sustaining discharge potential which is lower than said first sustaining discharge potential;
- a fourth sustaining discharge supply circuit for setting said potentials of said scanning electrodes at a fourth sustaining discharge potential which is higher than said second sustaining discharge potential;
- a fifth sustaining discharge supply circuit for setting said potentials of said sustaining electrodes at a fifth sustaining discharge potential;
- a sixth sustaining discharge supply circuit for setting said potentials of said scanning electrodes at a sixth sustaining discharge potential which is lower than said fifth sustaining discharge potential;
- a seventh sustaining discharge supply circuit for setting said potentials of said sustaining electrodes at a seventh sustaining discharge potential which is higher than said fifth sustaining discharge potential;
- and
- an eighth sustaining discharge supply circuit for setting said potentials of said scanning electrodes at an eighth sustaining discharge potential which is lower than said sixth sustaining discharge potential,
- wherein for every sustaining pulses causing said scanning electrodes to be higher in potential than said sustaining electrodes, said first and second sustaining discharge supply circuits are operated to cause a first sustaining discharge between said sustaining electrodes and said scanning electrodes, and subsequently, said third and fourth sustaining discharge supply circuits are operated to cause a second sustaining discharge between said sustaining electrodes and said scanning electrodes, and
- wherein for every sustaining pulses causing said scanning electrodes to be lower in potential than said sustaining electrodes, said fifth and sixth sustaining discharge supply circuits are operated to cause a third sustaining discharge between said sustaining electrodes and said scanning electrodes, and subsequently, said seventh and eighth sustaining discharge supply circuits are operated to cause a fourth sustaining discharge between said sustaining electrodes and said scanning electrodes.
8 more elements
A method of driving a sustaining pulse for a plasma display panel, including the steps of:
- applying a sustaining discharge voltage for each sustaining pulse;
- causing a step-by-step increase of said sustaining discharge voltage over plural steps, to selectively cause respective sustaining discharges on said plural steps;
- wherein a continuous discharge current is sustained during a series of said sustaining discharges based on each said sustaining pulse, and
- wherein after an initial step of the increase in said sustaining discharge voltage, said sustaining discharge voltage is decreased and then increased toward a next step of the increase;
- and
- controlling respective sustaining discharge application periods for said receptive sustaining discharges on said plural steps,
- wherein the controlling step is accomplished so that a time difference between steps of said plural steps is in the range of 100 nanoseconds to 300 nanoseconds.
4 more elements
A circuit for driving sustaining pulses for a plasma display panel, said circuit comprising:
- a first sustaining discharge supply circuit for setting potentials of sustaining electrodes at a first sustaining discharge potential;
- a second sustaining discharge supply circuit for setting potentials for scanning electrodes at a second sustaining discharge potential which is higher than said first sustaining discharge potential;
- a third sustaining discharge supply circuit for setting said potentials of said sustaining electrodes at a third sustaining discharge potential;
- a fourth sustaining discharge supply circuit for setting said potentials of scanning electrodes at a fourth sustaining discharge potential which is higher than said third sustaining discharge potential;
- a fifth sustaining discharge supply circuit for setting said potentials of said sustaining discharge potential;
- a sixth sustaining discharge supply circuit for setting said potentials of said scanning electrodes at a sixth sustaining discharge potential which is lower than said fifth sustaining discharge potential;
- a seventh sustaining discharge supply circuit for setting said potentials of said sustaining electrodes at a seventh sustaining discharge potential;
- and
- an eighth sustaining discharge supply circuit for setting said potentials of said scanning electrodes at an eighth sustaining discharge potential which is lower than said seventh sustaining discharge potential,
- wherein for every sustaining pulses causing said scanning electrodes to be higher in potential than said sustaining electrodes, said first and second sustaining discharge supply circuit are operated to cause a first sustaining discharge between said sustaining electrodes and said scanning electrodes, and subsequently, said first, second, third and fourth sustaining discharge supply circuit are operated at the same time to cause a second sustaining discharge between said sustaining electrodes and said scanning electrodes, and
- wherein for every sustaining pulses causing said scanning electrodes to be lower in potential than said sustaining electrodes, said fifth and sixth sustaining discharge supply circuit are operated to cause a third sustaining discharge between said sustaining electrodes and said scanning electrodes, and subsequently, said first, sixth, seventh and eighth sustaining discharge supply circuits are operated at the same time to cause a fourth sustaining discharge between said sustaining electrodes and said scanning electrodes.
8 more elements
A circuit for driving sustaining discharge pulses for a plasma display panel, said circuit comprising:
- first and second sustaining discharge supply circuits for setting a voltage difference between sustaining electrodes and scanning electrodes at a first sustaining discharge voltage in a sustaining discharge pulse, which is over a discharge initiation voltage;
- third and fourth sustaining discharge supply circuits for setting voltage difference at a second sustaining discharge voltage in said sustaining pulse, which is higher than said first sustaining discharge voltage.
A circuit for driving sustaining pulses for a plasma display panel, said circuit comprising:
- a first slope circuit for setting a voltage difference between sustaining electrodes and scanning electrodes;
- first and second sustaining discharge supply circuits for setting the voltage difference between sustaining electrodes and scanning electrodes at a first sustaining discharge voltage, which is over a discharge initiation voltage, within a period of each sustaining pulse,
- third and fourth sustaining discharge supply circuits for setting the voltage difference at a second sustaining discharge voltage, which is over a discharge initiation voltage, within said period of said each sustaining pulse,
- wherein the supplying current capability of said third and fourth sustaining discharge supply circuits is larger than that of said first and second sustaining discharge supply circuits.
1 more element
A method of driving a sustaining pulse for a plasma display panel, said method including the steps of:
- operating first and second circuits to set a voltage difference between sustaining electrodes and scanning electrodes at a first sustaining discharge voltage, which is higher than a discharge initiation voltage, within a period of each sustaining pulse;
- and
- operating third and fourth circuits to set said voltage difference at a second sustaining discharge voltage, which is higher than said first sustaining discharge voltage, within said period of said each sustaining pulse.
A method of driving a sustaining pulse for a plasma display panel, said method including the steps of:
- a first step of setting a voltage difference between sustaining electrodes and scanning electrodes at a first sustaining discharge voltage, which is higher than a discharge initiation voltage, within a period of each sustaining pulse;
- and
- a second step of setting said voltage difference at a second sustaining discharge voltage, which is also higher than said discharge initiation voltage, within said period of said each sustaining pulse,
- wherein said second sustaining discharge voltage is higher than said sustaining discharge voltage.
1 more element
Dependencies are inferred from the claim text.