Method for driving a gas electric discharge device
A method for driving a plasma display panel having at least three electrodes. The method includes applying a first pulse having a voltage changing with time in a positive direction and a second pulse having a voltage changing with time in a negative direction to a second main electrode in an address preparation period. The method also includes applying a scan pulse to the second main electrode in an address period. The method also includes at least one of the first and second pulses in the address preparation period has a stepwise waveform whose voltage rise or fall stepwise.
1 . A method for driving a plasma display panel having at least three electrodes including a pair of a first main electrode and a second main electrode disposed on every line of a screen, and an address electrode disposed on every column of the screen, the method comprising:
applying a first pulse having a voltage changing with time in a positive direction and a second pulse having a voltage changing with time in a negative direction to the second main electrode in an address preparation period; and
applying a scan pulse to the second main electrode in an address period, and at least one of said first and second pulses in the address preparation period has a stepwise waveform whose voltage rise or fall stepwise.
2 . A method for driving a plasma display panel having at least three electrodes including a pair of a first main electrode and a second main electrode disposed on every line of the screen, and an address electrode disposed on every column of the screen, the method comprising:
applying a first pulse having a voltage changing with time in a positive direction and a second pulse having a voltage changing with time in a negative direction between the first and second main electrodes in an address preparation period; and
applying a scan pulse to the second main electrode in an address period, and at least one of the first and second pulses in the address preparation period is applied as a voltage difference between a rectangular waveform with positive or negative polarity to one of the first and second main electrodes and a ramp or stepwise waveform with negative or positive polarity to the other of the first and second main electrodes.
3 . The method according to claim 2 , wherein the voltage difference applied as at least one of the first and second pulses has a waveform whose voltage rises quickly to an amplitude of the rectangular waveform within such a range that a cell voltage does not exceed a firing voltage, and then rises gradually to a predetermined voltage.
4 . A method for driving an AC type surface discharge display panel having a plurality of cells arranged in an matrix, each cell having at least three electrodes including a pair of a first main electrode and a second main electrode disposed on every line of the matrix, an address electrode disposed on every column of the matrix, the method comprising:
providing an address preparation period comprising:
applying a charge producing pulse to the second main electrode used as a scan electrode with a positive polarity, and
applying a charge adjusting pulse to the second main electrode used as the scan electrode with a negative polarity, the charge adjusting pulse having a waveform falling stepwise from a first predetermined potential to a second predetermined potential; and
providing an address period selectively applying a negative scan pulse, whose potential is lower than the second predetermined potential of the charge adjusting pulse, to the second main electrode, thereby to scan of the lines of the matrix.