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EP0160455A2
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EP
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Driving a gas discharge display device
Assignee: Fujitsu Ltd
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Filing: 1985-04-18
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Granted: —
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Expires: 2005-04-18
Abstract
Abstract In a method of driving a gas discharge display device having two parallel-electrode arrays, the respective arrays being on opposite walls separated by a gas filled space and being oriented mutually transversely to form discharge cells at the crossing points of the electrodes of the arrays, a write signal (2, 12) is applied to a selected electrode (Yj) of one array to discharge all cells (Cij) formed along that electrode, and then an erase signal (3, 13) is applied to that selected electrode (Yj) and cancelling signals (6, 16) are applied coincidentally to selected electrodes (Xi) only of the other array. Thus the erase signals (3, 13) as applied to (3, 13) to cells located where the selected electrodes of the two arrays cross are cancelled to prevent erasure of discharges at those cells to selectively display information on the device.
Inventors
- 👤 Akira C/O Fujitsu Limited Otsuka
- 👤 Tsutae C/O Fujitsu Limited Shinoda
- 👤 Kenji C/O Fujitsu Limited Horio
- 👤 Tsuyoshi C/O Fujitsu Limited Tanioka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 13:05
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G3/288; G09G3/291; G09G3/294; G09G3/293; G09G3/2935; G09G3/297; G09G2310/00; G09G2310/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
228 words
A method of driving a gas discharge display device, which device has an array of first electrodes and an array of second electrodes, with a gas discharge space between the arrays and with the first electrodes crossing the second electrodes to form a matrix arrangement of gas discharge cells corresponding to respective crossing points of the electrodes, the method comprising: selecting a first electrode and applying a write signal, to the selected first electrode, capable of establishing a discharging condition in gas discharge cells formed along the selected first electrode, applying an erase signal to the selected first electrode, and simultaneously applying a plurality of cancelling signals to selected second electrodes, whereby in respect of each cell located at the crossing point of said selected first electrode and a non-selected second electrode, to which such a cancelling signal is not _ applied, the erase signal is effective to destroy a discharging condition previously established in the cell so that discharges no longer take place in the cell, and whereby in respect of each cell located at the crossing point of said selected first electrode and a selected second electrode the effect of the erase signal is cancelled and the cell remains in a discharging condition previouslyestablished by the application of the write signal, discharges in the cell being sustained by subsequent application of sustain signals to the cell.
Claim 2
Independent Claim
228 words
A method of driving a gas discharge display device, which device has an array of first electrodes and an array of second electrodes, with a gas discharge space between the arrays and with the first electrodes crossing the second electrodes to form a matrix arrangement of gas discharge cells corresponding to respective crossing points of the electrodes, the method comprising: selecting a first electrode and applying a write signal, to the selected first electrode, capable of establishing a discharging condition in gas discharge cells formed along the selected first electrode, applying an erase signal to the selected first electrode, and simultaneously applying a plurality of cancelling signals to selected second electrodes, whereby in respect of each cell located at the crossing point of said selected first electrode and a non-selected second electrode, to which such a cancelling signal is not _ applied, the erase signal is effective to destroy a discharging condition previously established in the cell so that discharges no longer take place in the cell, and whereby in respect of each cell located at the crossing point of said selected first electrode and a selected second electrode the effect of the erase signal is cancelled and the cell remains in a discharging condition previouslyestablished by the application of the write signal, discharges in the cell being sustained by subsequent application of sustain signals to the cell.
Claim 3
Dependent Claim
75 words
A method as claimed in claim 1, further comprising applying a further plurality of cancelling signals, simultaneously with the write signal, to selected second electrodes, which may be different from the selected second electrodes of claim 1, to prevent establishment of a discharging condition by the write signal at cells located at the crossing points of the selected first electrode and the selected second electrodes to which the further plurality of cancelling signals are applied.
Claim 4
Dependent Claim
49 words
A method as claimed in claim 1 or 2, wherein the write signal, the erase signal and a sustain signal are applied to said selected first electrode with the same polarity; and the cancelling signals and a sustain signal are selectively applied to second electrodes with the same polarity.
Claim 5
Dependent Claim
52 words
A method as claimed in claim 1 or 2, wherein the write signal, the erase signal and a sustain signal of one polarity and a sustain signal of the opposite polarity are applied to said selected first electrode; and the cancelling signals are applied selectively to second electrodes with the same polarity.
Claim 6
Dependent Claim
29 words
A method as claimed in any preceding claim, wherein the peak voltage of the cancelling signals of claim 1 is lower than the peak voltage of said sustain signals.
Claim 7
Dependent Claim
32 words
A method as claimed in claim 5, wherein the peak voltage of the cancelling signals of claim 1 is lower than one half (1/2) of the peak voltage of said sustain signals.
Claim 8
Dependent Claim
43 words
A method as claimed in claim 2, or any one of claims 3 to 6 when read as appended to claim 2, wherein the peak voltage of the cancelling signals of claim 2 is lower than the peak voltage of said sustain signals.
Claim 9
Dependent Claim
32 words
A method as claimed in claim 7, wherein the peak voltage of the cancelling signals of claim 2 is lower than the two-thirds (2/3) of the peak voltage of said sustain signals.
Claim 10
Independent Claim
39 words
A method as claimed in any preceding claim, comprising selecting each first electrode in turn, and so applying the said signals for each selection of a first electrode, to display a predetermined information on said gas discharge display panel.
References Cited (Backward Citations)
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