US3867666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High density light emitting diode array
Assignee: RCA Corp
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Filing: 1974-03-19
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Granted: 1975-02-18
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Expires: 1994-03-19
Abstract
Abstract A plurality of light emitting diodes are mounted in spaced relation in a recess in a conductive substrate. Each light emitting diode has regions of opposite conductivity type which form a PN junction and each light emitting diode has a light emitting end surface. The regions of the same conductivity are electrically connected to the substrate and each one of the regions of the opposite conductivity are electrically connected to a separate one of a plurality of contact terminals. The light emitting end surfaces of the light emitting diodes face in substantially the same direction.
Inventors
- 👤 Paul Nyul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:14
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H10; H10H; H10H20/00; H10H20/80
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
A high density light emitting diode array comprising: a conductive substrate having a recess in a surface thereof, and a plurality of light emitting diodes, each of said light emitting diodes having regions of opposite conductivity type which form a PN junction, each of said regions having a surface and each light emitting diode having a light emitting end surface, said light emitting diodes being mounted in spaced relation in said recess of said substrate with the surfaces of one of the regions of the same conductivity being in electrical contact with said substrate, the surfaces of the regions of the opposite conductivity being substantially coplanar with at least a portion of said surface of said substrate, and said Light emitting end surfaces facing in substantially the same direction.
Claim 2
Dependent Claim
129 words
A high density light emitting diode array comprising: a conductive substrate having a recess in a surface thereof, and a plurality of light emitting diodes, each of said light emitting diodes having regions of opposite conductivity type which form a PN junction, each of said regions having a surface and each light emitting diode having a light emitting end surface, said light emitting diodes being mounted in spaced relation in said recess of said substrate with the surfaces of one of the regions of the same conductivity being in electrical contact with said substrate, the surfaces of the regions of the opposite conductivity being substantially coplanar with at least a portion of said surface of said substrate, and said Light emitting end surfaces facing in substantially the same direction.
Claim 3
Dependent Claim
27 words
A high density light emitting diode array in accordance with claim 1 including means for applying an electrical current across each one of said light emitting diodes.
Claim 4
Dependent Claim
47 words
A high density light emitting diode array in accordance with claim 2 in which a plurality of substantially coplanar contact terminals are each mounted on a separate one of said surfaces of said regions of opposite conductivity and on said portion of said surface of said substrate.
Claim 5
Dependent Claim
28 words
A high density light emitting diode array in accordance with claim 3 in which said contact terminals are conducting strips mounted on a surface of an insulating layer.
Claim 6
Dependent Claim
33 words
A high density light emitting diode array in accordance with claim 4 including a conducting layer on another surface of said insulating layer, and means electrically connecting said conducting layer to said substrate.
Claim 7
Dependent Claim
42 words
A high density light emitting diode array in accordance with claim 5 in which said conducting layer is electrically connected to a contact terminal mounted on said portion of said surface of said substrate by a conducting passageway through said insulating layer.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |