US3958151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for driving a plasma display panel with application of opposite phase suppression pulses to selection electrodes
Assignee: NEC Corp
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Filing: 1973-10-17
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Granted: 1976-05-18
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Expires: 1993-10-17
Abstract
Abstract When a plasma display panel driven by a conventional driving circuit therefor, spurious pulsed voltages appear across discharge cells which are in the vicinity of a selected discharge cell. A method and apparatus for driving a plasma display panel in a time division manner includes supplying the plasma display panel electrodes with suppress pulse trains for cancelling the spurious pulse voltages coupled thereto. The suppress pulse trains are in synchronism with, and of a polarity opposite to the driving pulses that are supplied to such electrodes in accordance with time division principles.
Inventors
- 👤 Akira Yano
- 👤 Norio Sato
- 👤 Tunekiyo Iwakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:53
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/04; G09G3/06; G09G3/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
155 words
In combination in plasma display apparatus, an electrode discharge display panel including first and second electrode groups, and a plurality of gas discharge cells disposed at the spacial intersection of the electrodes of said electrode groups, drive means for energizing said electrodes in a time division manner, said electrode energizing drive means comprising means for sequentially energizing the electrodes of said first electrode group with pulse trains of a first polarity, means for energizing said electrodes of said second group with pulse trains of a second polarity opposite to said first polarity, combinations of said electrodes in said second group being coincidentally excited in accordance with the display desired, a suppression source of pulses of said first polarity, and capacitance means coupling said suppression source to said electrodes of said second electrode group for cancelling voltages spuriously induced therein when selected of said second electrode group are energized by said second electrode group energizing means.
Claim 2
Dependent Claim
155 words
In combination in plasma display apparatus, an electrode discharge display panel including first and second electrode groups, and a plurality of gas discharge cells disposed at the spacial intersection of the electrodes of said electrode groups, drive means for energizing said electrodes in a time division manner, said electrode energizing drive means comprising means for sequentially energizing the electrodes of said first electrode group with pulse trains of a first polarity, means for energizing said electrodes of said second group with pulse trains of a second polarity opposite to said first polarity, combinations of said electrodes in said second group being coincidentally excited in accordance with the display desired, a suppression source of pulses of said first polarity, and capacitance means coupling said suppression source to said electrodes of said second electrode group for cancelling voltages spuriously induced therein when selected of said second electrode group are energized by said second electrode group energizing means.
Claim 3
Dependent Claim
37 words
A combination as in claim 1 wherein electrodes of said second group are formed within said display panel, and wherein said capacitance means comprises conductive means secured in spaced relation to said formed electrodes in said panel.
Claim 4
Dependent Claim
22 words
A combination as in claim 1 wherein said electrode energizing means comprises switching and logic means, said capacitance means being connected thereto.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |