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Patent US3573568A successfully refreshed from Google Patents.
US3573568A
Expired / Lapsed
US
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Light emitting semiconductor chips mounted in a slotted substrate forming a display apparatus
Assignee: General Electric Co
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Filing: 1969-06-18
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Granted: 1971-04-06
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Expires: 1989-06-18
Abstract
Abstract An insulating substrate has slots in its face corresponding to the visual display pattern in which light-emitting chips consisting of solid-state PN junctions are mounted. The chips have ohmic contacts to the P and N-type material on opposite sides which are connected by brazing or soldering to metallized portions on opposite sides of the slots. External electrical connections are made through current feed pins passing through the substrate and connected to the metallized portions. The chips emit edgewise a bright pattern easily visible under room illumination levels.
Inventors
- 👤 Harvey V Siegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:44
CPC Classifications
H; H10; H10H; H10H29/00; H10H29/10; H10H20/00; H10H20/80
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
28 words
A device as in claim 1 wherein the line source crystal chips are edgewise mounted in the slots with the junctions normal to the face of the block.
Claim 2
Dependent Claim
30 words
A device as in claim 1 wherein the line sources are silicon carbide crystal chips edgewise mounted in the slots with the junctions normal to the face of the block.
Claim 3
Dependent Claim
38 words
A device as in claim 1 wherein the line sources are gallium arsenide crystal chips and the device is coateD over with stepwise excited phosphor responsive to the infrared radiation of gallium arsenide to provide a visible output.
References Cited (Backward Citations)
US3231776A
Cited
US3308452A
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US3284722A
Cited
US3354342A
Cited
US3327153A
Cited
US3413603A
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 |