Plasma display panel and driving method thereof
First Claim
Patent Images
1. A plasma display panel comprising:
- a power supply adapted to receive an Alternating Current (AC) power input and to supply power to the plasma display panel;
a driving circuit adapted to drive the plasma display panel with voltages and currents supplied from said power supply;
a logic unit adapted to output a control signal to control said driving circuit; and
a plasma panel adapted to display video data from said logic unit, said plasma panel including a plurality of address electrodes and a plurality of first electrodes and a plurality of second electrodes arranged to intersect said address electrodes;
wherein said power supply includes a power off detector adapted to detect an internal voltage of said power supply and to determine if the AC power input to said power supply has been turned off on the basis of the detected internal voltage;
wherein said logic unit is adapted to output a control signal to turn off the plasma display panel in response to an output signal from said power off detector indicating that the AC power input has been turned off; and
wherein said power off detector includes a discharge voltage detector adapted to detect a voltage for a sustain discharge of the plasma display panel from among the voltages supplied from said power supply and to output a signal corresponding to the detected voltage.
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Accused Products
Abstract
In a Plasma Display Panel (PDP) power control apparatus, an internal voltage of a power supply is detected, and a determination is made as to whether an Alternating Current (AC) power input to the power supply has been turned off on the basis of the detected internal voltage. The output of the power supply is controlled according to a predetermined sequence based on a result of the determination to turn off the PDP. The apparatus rapidly and accurately senses that the AC power has been turned off and performs a predetermined power off sequence to prevent damage to a driving circuit and to prevent the picture quality of the PDP from being degraded.
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Citations
13 Claims
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1. A plasma display panel comprising:
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a power supply adapted to receive an Alternating Current (AC) power input and to supply power to the plasma display panel; a driving circuit adapted to drive the plasma display panel with voltages and currents supplied from said power supply; a logic unit adapted to output a control signal to control said driving circuit; and a plasma panel adapted to display video data from said logic unit, said plasma panel including a plurality of address electrodes and a plurality of first electrodes and a plurality of second electrodes arranged to intersect said address electrodes; wherein said power supply includes a power off detector adapted to detect an internal voltage of said power supply and to determine if the AC power input to said power supply has been turned off on the basis of the detected internal voltage; wherein said logic unit is adapted to output a control signal to turn off the plasma display panel in response to an output signal from said power off detector indicating that the AC power input has been turned off; and wherein said power off detector includes a discharge voltage detector adapted to detect a voltage for a sustain discharge of the plasma display panel from among the voltages supplied from said power supply and to output a signal corresponding to the detected voltage. - View Dependent Claims (2, 3, 4, 5)
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6. A plasma display panel comprising:
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a power supply adapted to receive an Alternating Current (AC) power input and to supply power to the plasma display panel; a driving circuit adapted to drive the plasma display panel with voltages and currents supplied from said power supply; a logic unit adapted to output a control signal to control said driving circuit; and a plasma panel adapted to display video data from said logic unit, said plasma panel including a plurality of address electrodes and a plurality of first electrodes and a plurality of second electrodes arranged to intersect said address electrodes; wherein said power supply includes a power off detector adapted to detect an internal voltage of said power supply and to determine if the AC power input to said power supply has been turned off on the basis of the detected internal voltage; wherein said logic unit is adapted to output a control signal to turn off the plasma display panel in response to an output signal from said power off detector indicating that the AC power input has been turned off; and wherein said power off detector includes; a photocoupler adapted to detect a voltage of said AC power input to said power supply; and an Analog to Digital Converter (ADC) adapted to convert an output signal of said photocoupler into a digital signal. - View Dependent Claims (7)
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8. A method of driving a plasma display panel, the method comprising:
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supplying power to the plasma display panel with a power supply; driving the plasma display panel with voltages and currents supplied from said power supply via a driving circuit; outputting a control signal to control said driving circuit with a logic unit; displaying video data from said logic unit on a plasma panel, said plasma panel including a plurality of address electrodes, a plurality of first electrodes and a plurality of second electrodes arranged to intersect said address electrodes; detecting a voltage of said power supply by detecting a sustain discharge voltage from among the voltages supplied by said power supply; and outputting a control signal to said driving circuit on the basis of the detected voltage to control on/off operations of driving switches so as to perform a normal operation or a power off operation; wherein outputting a control signal to said driving circuit includes; comparing a value of the detected voltage with a pre-stored reference voltage value; determining if an Alternating Current (AC) power input to said power supply has been turned off on the basis of a result of the comparison; and outputting said control signal on the basis of a result of the determination to turn off the plasma display panel upon the AC power input has been turned off. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification