US3626235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display panel with double cathode
Assignee: Unisys Corp
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Filing: 1970-03-13
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Granted: 1971-12-07
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Expires: 1990-03-13
Abstract
Abstract A display panel including first and second layers of gas-filled cells with cathodes in common between the layers and with separate anodes associated with each layer. Tiny apertures in the cathodes interconnect respective cells in each layer. Doublelayered cathodes are used to prevent spurious transfer of ionized gas (cathode glow) from the cells in one layer to the respective cells in the other layer.
Inventors
- 👤 George A Kupsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:23
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/492; H01J17/494
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
86 words
In a display device including first and second layers of gasfilled cells with separate first electrodes associated with each layer and a second electrode in common between said layers, wherein individual cells in each layer are interconnected by an aperture of very small diameter, the improvement comprising: means in common to said first and second layers for providing an intermediate layer of cells in the second electrode for preventing spurious transfer of electrode glow from cells in said first layer to cells in said second layer.
Claim 2
Dependent Claim
86 words
In a display device including first and second layers of gasfilled cells with separate first electrodes associated with each layer and a second electrode in common between said layers, wherein individual cells in each layer are interconnected by an aperture of very small diameter, the improvement comprising: means in common to said first and second layers for providing an intermediate layer of cells in the second electrode for preventing spurious transfer of electrode glow from cells in said first layer to cells in said second layer.
Claim 3
Dependent Claim
22 words
The apparatus of claim 1 wherein said providing means includes: a double-layered electrode, said electrode layers being maintained apart by nonconductive spacers.
Claim 4
Dependent Claim
12 words
The apparatus of claim 2 wherein said spacers are a glass frit.
Claim 5
Dependent Claim
57 words
A display panel comprising: an array of first and second communicating gas cells, means for maintaining glow in said first cells, selective means for spreading said glow into said seconds cells, and electrode means providing intermediate cells for preventing the spread of said glow into said second cells in the absence of activation of said selective means.
Claim 6
Dependent Claim
57 words
A display panel comprising: an array of first and second communicating gas cells, means for maintaining glow in said first cells, selective means for spreading said glow into said seconds cells, and electrode means providing intermediate cells for preventing the spread of said glow into said second cells in the absence of activation of said selective means.
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |