US3764847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glow-discharge display device
Assignee: US Philips Corp
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Filing: 1972-06-28
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Granted: 1973-10-09
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Expires: 1992-06-28
Abstract
Abstract Electrical glow-discharge display device with an array of glowdischarge paths and a cross-bar addressing system therefore. Each anode of a row is, through an electrically resistive connection, connected to a common row supply conductor. The anodes, the electrically resistive connections and the row supply conductors are formed by thin films on a face plate of the device. An insulating layer covers the thin films with the exception of breaks at each anode film.
Inventors
- 👤 J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
Electrical glow-discharge display device comprising an array of anode-cathode electrode pairs defining an array of individually addressable glow-discharge paths through a gas atmosphere contained in said device, and a cross-bar addressing system therefore, the anodes of each row of the array being individually connected through an electrically resistive connection to a common row supply conductor which forms part of the addressing system, the anodes, the electrically resistive connections and the row supply conductors being formed by thin films deposited on an inner surface of an optically permeable viewing window of the device, and at least the major portion of the electrically resistive connections and of the row supply conductors being covered with an electrically insulating layer.
Claim 2
Dependent Claim
116 words
Electrical glow-discharge display device comprising an array of anode-cathode electrode pairs defining an array of individually addressable glow-discharge paths through a gas atmosphere contained in said device, and a cross-bar addressing system therefore, the anodes of each row of the array being individually connected through an electrically resistive connection to a common row supply conductor which forms part of the addressing system, the anodes, the electrically resistive connections and the row supply conductors being formed by thin films deposited on an inner surface of an optically permeable viewing window of the device, and at least the major portion of the electrically resistive connections and of the row supply conductors being covered with an electrically insulating layer.
Claim 3
Dependent Claim
31 words
Display device as claimed in claim 1, wherein the insulating layer is substantially continuous over substantially the whole of said inner surface with the exception of breaks at each anode film.
Claim 4
Dependent Claim
36 words
Display device as claimed in claim 2, wherein an individual electrically conductive layer is deposited over the insulating layer which covers each electrically resistive thin-film connection, and said conductive layer electrically contacts the corresponding anode film.
Claim 5
Dependent Claim
25 words
Display device as claimed in claim 2, wherein each said electrically resistive connection comprises a meandering path of a film of an electrically resistive material.
Claim 6
Dependent Claim
37 words
Display device as claimed in claim 4, wherein said electrically resistive material is nichrome and said anodes and said row supply conductors are a nichrome film which is thicker than the film forming said electrically resistive connections.
Claim 7
Independent Claim
78 words
A device as claimed in claims 1, the cathodes and column supply conductors therefore comprise elongate electrical conductors which extend through a block of electrically insulating material so that each elongate conductor is exposed at the base of each cavity of a column of cavities in a major surface of said block, the inner surface of said viewing window facing said major surface with the anode films aligned with the open ends of the cavities and spaced therefrom.
Claim 8
Dependent Claim
18 words
A device as claimed in claim 6, wherein each cavity tapers from its open end to Its base.
References Cited (Backward Citations)
US3334269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |