US3912964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-digit display apparatus
Assignee: Hitachi Ltd
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Filing: 1973-08-02
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Granted: 1975-10-14
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Expires: 1993-08-02
Abstract
Abstract A multi-digit display comprises an electrode board having a plurality of display sections and a transparent plate which is transparent at least for portions facing the individual display sections, the transparent plate and electrode board being stacked, the stack being hermetically sealed around the periphery thereof, the electrode board carrying cathodes arranged in groups for the individual display sections and anodes formed in portions surrounded by the individual cathodes and in portions surrounding the individual cathodes.
Inventors
- 👤 Masaharu Kouyama
- 👤 Kusuo Nakada
- 👤 Toyokazu Odaka
- 👤 Akio Miyamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:13
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/491
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A multi-digit display apparatus comprising an electrode board having a plurality of display sections and a transparent plate which is transparent at least for portions facing the individual display sections, said transparent plate and electrode board being stacked, the stack being hermetically sealed around the periphery thereof, said electrode board carrying a plurality of cathode elements arranged in digit-8 groups for the individual display sections and anodes formed in portions surrounded by the individual cathode elements and in portions surrounding the individual cathode elements for each said digit-8 group, said anodes being commonly connected in each said display section and to a terminal for each said display section and corresponding cathode elements in each said display section being electrically connected with each other and to a terminal for each said element, the total area of the anodes in each display section being greater than the total cathode area in that section.
Claim 2
Dependent Claim
151 words
A multi-digit display apparatus comprising an electrode board having a plurality of display sections and a transparent plate which is transparent at least for portions facing the individual display sections, said transparent plate and electrode board being stacked, the stack being hermetically sealed around the periphery thereof, said electrode board carrying a plurality of cathode elements arranged in digit-8 groups for the individual display sections and anodes formed in portions surrounded by the individual cathode elements and in portions surrounding the individual cathode elements for each said digit-8 group, said anodes being commonly connected in each said display section and to a terminal for each said display section and corresponding cathode elements in each said display section being electrically connected with each other and to a terminal for each said element, the total area of the anodes in each display section being greater than the total cathode area in that section.
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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |