Patent US3671938A successfully refreshed from Google Patents.
US3671938A
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Gaseous display device
Assignee: AT&T Inc
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Filing: 1969-05-02
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Granted: 1972-06-20
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Expires: 1989-05-02
Abstract
Abstract An improved plasma display device in which the cellular or perforated middle layer of gas-filled holes is replaced with a substantially uniform continuous layer of gas, thereby simplifying manufacture and assembly of the device. The display driving circuitry includes individual row and column pulse transformers having their secondary windings connected to a common alternating polarity sustaining signal source and having their primary windings connected to respective address signal input leads. An address signal on a selected row lead and column lead initiates discharge breakdown of the gas at the row-column intersection. The sustaining signal thereafter operates in conjunction with charge stored at the intersection by the initial breakdown to periodically break down the gas at the intersection. Initial breakdown is effected advantageously during a different interval than the interval in which periodic breakdown occurs at other intersections.
Inventors
- 👤 Diah-Tuan Ngo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:27
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G3/288
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
64 words
A display device comprising first and second pluralities of conductors, an array of dIsplay cells individually defined by the intersection of one of said first plurality of conductors and one of said second plurality of conductors, and means disposed between said first and second pluralities of conductors including first and second dielectric means separated by a substantially uniform continuous layer of gaseous display material.
Claim 2
Dependent Claim
64 words
A display device comprising first and second pluralities of conductors, an array of dIsplay cells individually defined by the intersection of one of said first plurality of conductors and one of said second plurality of conductors, and means disposed between said first and second pluralities of conductors including first and second dielectric means separated by a substantially uniform continuous layer of gaseous display material.
Claim 3
Dependent Claim
60 words
A display device arrangement comprising first and second pluralities of conductors arranged so as to define a matrix of crosspoint display cells, and first and second layers of dielectric material disposed between said first and second pluralities of conductors, characterized by a substantially uniform continuous layer of gaseous display material disposed between said first and second layers of dielectric material.
Claim 4
Dependent Claim
60 words
A display device arrangement comprising first and second pluralities of conductors arranged so as to define a matrix of crosspoint display cells, and first and second layers of dielectric material disposed between said first and second pluralities of conductors, characterized by a substantially uniform continuous layer of gaseous display material disposed between said first and second layers of dielectric material.
Claim 5
Dependent Claim
59 words
An arrangement in accordance with claim 2 further comprising means for selectively addressing individual ones of said display cells to initiate a discharge breakdown thereat, and sustaining means connected to each of said display cells and operative upon the initial discharge breakdown of individual ones of said cells for thereafter periodically breaking down said individual ones of said cells.
Claim 6
Dependent Claim
66 words
An arrangement in accordance with claim 3 wherein said addressing means comprises respective pulse transformers having secondary windings connected to individual ones of said first and second pluralities of conductors, each said transformer having a primary winding connected to a respective address signal input lead, and wherein said sustaining means comprises an alternating signal source connected to the secondary windings of each of said pulse transformers.
Claim 7
Dependent Claim
87 words
An arrangement in accordance with claim 3 further comprising means for selectively addressing said display cells to initiate a discharge breakdown at said addressed cells, said initial breakdown at a display cell storing a charge on the adjacent surfaces of said first and second layers of dielectric material at said addressed cells, and alternating signal means connected to each of said cells, said alternating signal means operative in conjunction with said stored charge at respective ones of said display cells for periodically breaking down said respective cells.
Claim 8
Dependent Claim
109 words
In combination, a first layer of dielectric material, a plurality of first conductors disposed on one side of said first dielectric material layer, a second layer of dielectric material, a second conductor disposed on one side of said second dielectric material layer, said first and second dielectric material layers being disposed with the other sides of said first and second dielectric material layers in facing, spaced apart relationship such that said second conductor defines an individual display cell with each of said plurality of first conductors, and a substantially uniform continuous layer of gaseous display material disposed between said other sides of said first and second dielectric material layers.
Claim 9
Dependent Claim
109 words
In combination, a first layer of dielectric material, a plurality of first conductors disposed on one side of said first dielectric material layer, a second layer of dielectric material, a second conductor disposed on one side of said second dielectric material layer, said first and second dielectric material layers being disposed with the other sides of said first and second dielectric material layers in facing, spaced apart relationship such that said second conductor defines an individual display cell with each of said plurality of first conductors, and a substantially uniform continuous layer of gaseous display material disposed between said other sides of said first and second dielectric material layers.
Claim 10
Dependent Claim
77 words
The combination in accordance with claim 6 further comprising means for addressing a selected one of said display cells to initiate a discharge breakdown through the portion of said gaseous display material between said first and second conductors defining said selected display cell, and sustaining means connected to each of said display cells and operative upon the initial discharge breakdown of individual ones of said cells for thereafter periodically breaking down said individual ones of said cells.
Claim 11
Dependent Claim
34 words
The combination in accordance with claim 7 wherein said sustaining means comprises an alternating signal source connected to each of said display cells and of a magnitude insufficient to initially break down said cells.
Claim 12
Dependent Claim
61 words
The combination in accordance with claim 8 wherein said addressing means comprises respective pulse transformers having secondary windings connected to individual ones of said first and second conductors, each said transformer having a primary winding connected to a respective address signal input lead, and wherein said alternating signal source is connected to the secondary windings of each of said pulse transformers.
Claim 13
Dependent Claim
41 words
The combination in accordance with claim 8 wherein said addressing means includes means for applying a predetermined signal to said selected display cell of sufficient magnitude in conjunction with said alternating signal source to initially break down said selected display cell.
Claim 14
Dependent Claim
42 words
The combination in accordance with claim 10 wherein said applying means applies said predetermined signal to said selected display cell during a predetermined interval other than during said periodic breaking down of said individual ones of said cells by said sustaining means.
Claim 15
Dependent Claim
52 words
The combination in accordance with claim 7 wherein said addressing means includes means for applying a write pulse to said selected display cell during a predetermined interval, said predetermined interval being different than any interval during which said sustaining means is operative for periodically breaking down said individual ones of said cells.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |