Circuit for driving plasma display panel
First Claim
1. A circuit for driving scan hold electrodes in a plasma display panel which comprises at least a plurality of scan hold electrodes having a scan electrode function and a hold electrode function, and a plurality of data electrodes orthogonal to said scan hold electrodes, the circuit comprising:
- a scan pulse drive circuit including an integrated circuit and having a plurality of output terminals for outputting scan pulses to said scan hold electrodes;
a first diode array including a plurality of diodes, each having a cathode connected to a corresponding one of said plurality of output terminals;
a first switch element connected between an anode of each of said plurality of diodes of said first diode array and a first power supply;
a second switch element connected between a high voltage side power supply terminal of said scan pulse driving circuit and a second power supply having a potential lower than that of said first power supply; and
a pulse control circuit for alternately turning on said first switch element and said second switch element at least during a hold period.
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Accused Products
Abstract
A circuit for driving a plasma display panel includes a scan pulse drive integrated circuit having a plurality of output terminals, and a diode array composed of a corresponding number of diodes each having a cathode connected to a corresponding one of the plurality of output terminals. Anodes of all the diodes are connected in common to one end of a first switch having the other end connected to ground. A high voltage side power supply terminal of the scan pulse driving circuit is connected through a second switch to a negative power supply. During a hold period, the first switch is turned on, but the second switch is turned off, so that a discharge current flows through the diode array to display cells of the plasma display panel, without passing through the inside of the scan pulse driving circuit.
28 Citations
14 Claims
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1. A circuit for driving scan hold electrodes in a plasma display panel which comprises at least a plurality of scan hold electrodes having a scan electrode function and a hold electrode function, and a plurality of data electrodes orthogonal to said scan hold electrodes, the circuit comprising:
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a scan pulse drive circuit including an integrated circuit and having a plurality of output terminals for outputting scan pulses to said scan hold electrodes; a first diode array including a plurality of diodes, each having a cathode connected to a corresponding one of said plurality of output terminals; a first switch element connected between an anode of each of said plurality of diodes of said first diode array and a first power supply; a second switch element connected between a high voltage side power supply terminal of said scan pulse driving circuit and a second power supply having a potential lower than that of said first power supply; and a pulse control circuit for alternately turning on said first switch element and said second switch element at least during a hold period. - View Dependent Claims (2, 3, 4, 6, 7, 9, 10, 11)
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5. A circuit for driving scan hold electrodes in a plasma display panel which comprises at least a plurality of scan hold electrodes having a scan electrode function and a hold electrode function, and a plurality of data electrodes orthogonal to said scan hold electrodes, the circuit comprising:
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a scan pulse drive circuit comprising an integrated circuit and having a plurality of output terminals for outputting scan pulses to said scan hold electrodes; a first diode array including a plurality of diodes, each having a cathode connected to a corresponding one of said plurality of output terminals; a second diode array comprising a plurality of diodes, each having an anode connected to a corresponding one of said plurality of output terminals; a first switch element connected between an anode of each of said plurality of diodes of said first diode array and a first power supply; a second switch element connected between a cathode of each of said plurality of diodes of said second diode array and a second power supply; a third switch element connected between a high voltage side power supply terminal of said scan pulse driving circuit and a third power supply having a potential lower than that of said first power supply; and a pulse control circuit for alternately turning on said first switch element and said third switch element at least during a hold period, said pulse control circuit controlling an on-off switching of said second switch element at least during a scan write period. - View Dependent Claims (8, 12, 13, 14)
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Specification