US3573532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent display device having etched character electrodes
Assignee: Lockheed Martin Corp
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Filing: 1968-05-22
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Granted: 1971-04-06
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Expires: 1988-05-22
Abstract
Abstract An electroluminescent display device is provided, in which a substrate of the display is comprised of character electrodes, external connecting means for facilitating connections to external apparatus and a plurality of interconnecting means between the character electrodes and external connecting means. The character electrodes, interconnecting means and external connecting means form one integral unit, with the display device itself being a monolithic structure.
Inventors
- 👤 Gerald Boucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:08
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/302; H; H05; H05B; H05B33/00; H05B33/12; H05B33/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
An electroluminescent character display device comprising: a substrate subassembly including first and second etched circuits, said second etched circuit formed in the shape of desired characters, a layer insulating said circuits, and at least one solid electrically conductive member extending through said insulating layer, being integrally formed with and molecularly united to said first and second circuits such as to have a homogeneous grain structure therewith; a transparent layer of electrically conductive material; a layer of field responsive electroluminescent phosphor material disposed between said second etched circuit and said transparent layer of electrically conductive material; and an electrical insulating layer disposed upon said transparent layer of electrically conductive material.
Claim 2
Dependent Claim
109 words
An electroluminescent character display device comprising: a substrate subassembly including first and second etched circuits, said second etched circuit formed in the shape of desired characters, a layer insulating said circuits, and at least one solid electrically conductive member extending through said insulating layer, being integrally formed with and molecularly united to said first and second circuits such as to have a homogeneous grain structure therewith; a transparent layer of electrically conductive material; a layer of field responsive electroluminescent phosphor material disposed between said second etched circuit and said transparent layer of electrically conductive material; and an electrical insulating layer disposed upon said transparent layer of electrically conductive material.
Claim 3
Dependent Claim
38 words
Apparatus as recited in claim 1 further including: at least one electrically conductive member molecularly united to and having a homogeneous grain structure with said first etched circuit and traversing said insulating layer to an exterior surface thereof.
Claim 4
Dependent Claim
26 words
Apparatus as recited in claim 1 further including: a layer of dielectric material disposed between said second etched circuit and said field responsive electroluminescent phosphor layer.
Claim 5
Dependent Claim
28 words
Apparatus as recited in claim 1 further including: a layer of transparent insulating material bonded to the surface of said transparent electrically conductive layer opposite said phosphor layer.
References Cited (Backward Citations)
US3289198A
Cited
US3315248A
Cited
FR1485958A
Cited
US3435270A
Cited
US3384770A
Cited
US3385992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |