Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
1998-07-16
2001-02-27
Hjerpe, Richard A. (Department: 2774)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S068000
Reexamination Certificate
active
06195072
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a plasma display apparatus.
2. Description of Related Art
As a plasma display panel (hereinafter referred to as PDP) that is one of flat display apparatuses, there is known an AC (Alternate Current discharge) type PDP.
In cases where a scan pulse of a negative voltage as well as a priming pulse of a positive voltage are applied to an AC type PDP, it is difficult to drive a PDP which uses a row electrode drive signal having three level states by using a general-purpose IC because such an IC can perform scanning only with pulses of a single polarity for one channel.
OBJECT AND SUMMARY OF THE INVENTION
Accordingly, it is contemplated by the present invention to solve the problem mentioned above, and it is an object of this invention to provide a plasma display apparatus capable of easily implementing stable image display with low power dissipation.
A plasma display apparatus according to this invention comprises a plasma display panel having a plurality of row electrodes and a plurality of column electrodes laid out to intersect the row electrodes; and a row electrode driving device for applying a priming pulse to the row electrodes to temporarily discharge discharge cells formed at intersections of the row electrodes and the column electrodes, and then applying a scan pulse to the row electrodes to thereby write pixel data, the row electrode driving device including a first voltage supply for generating a DC voltage, a scan pulse generator for alternately applying a potential of a positive terminal of the first voltage supply and a potential of a negative terminal thereof to the row electrodes to generate the priming pulse and the scan pulse, and a voltage-supply potential shifter which includes a second voltage supply with a grounded negative terminal, said second voltage supply generating a DC voltage smaller than a voltage of the first voltage supply, for applying a potential of a positive terminal of said second voltage supply to the positive terminal of the first voltage supply, thereby shifting the potential of the negative terminal of the first voltage supply.
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Hosoi Kenichiro
Iwami Takashi
Kitagawa Mitsushi
Hjerpe Richard A.
Morgan & Lewis & Bockius, LLP
Nguyen Kevin M.
Pioneer Electronic Corporation
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