US4581629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light emitting devices
Assignee: RCA Corp
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Filing: 1983-06-17
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Granted: 1986-04-08
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Expires: 2003-06-17
Abstract
Abstract An improved light emitting device, comprising a light emitting element affixed to a tapered quadrilateral mounting surface of a copper heatsink, is disclosed. The tapered mounting surface includes two slightly divergent mounting edges whereby the width of the mounting surface varies to accommodate light emitting elements of varying sizes. The angle of divergence between the two mounting edges should be kept small to provide accurate facet-to-edge alignment of the light emitting element to the mounting surface.
Inventors
- 👤 Maria Harvey
- 👤 Robert E. Harwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:20
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/858; H10H20/8582; H01; H01S; H01S5/00; H01S5/02; H01S5/022; H01S5/023; H01S5/0233; H01S5/0235; H01S5/02355; H01S5/0237; H01S5/02375; H01S5/02345; H01S5/024
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
In a light emitting device which comprises a copper heatsink, including a mounting surface, with a light emitting element affixed thereto, which element includes two opposite emitting facets, wherein the improvement comprises a tapered quadrilateral mounting surface comprising a narrow edge and a wider edge, parallel to each other; and two opposite divergent mounting edges, to which said emitting facets of said light emitting element are substantially aligned; and wherein the dimensions of said narrow edge and said wider edge are in accordance with a desired range of sizes of light emitting elements whereby said mounting surface can provide accurate facet-to-mounting edge alignment for various sizes of light emitting elements within the desired range.
Claim 2
Dependent Claim
114 words
In a light emitting device which comprises a copper heatsink, including a mounting surface, with a light emitting element affixed thereto, which element includes two opposite emitting facets, wherein the improvement comprises a tapered quadrilateral mounting surface comprising a narrow edge and a wider edge, parallel to each other; and two opposite divergent mounting edges, to which said emitting facets of said light emitting element are substantially aligned; and wherein the dimensions of said narrow edge and said wider edge are in accordance with a desired range of sizes of light emitting elements whereby said mounting surface can provide accurate facet-to-mounting edge alignment for various sizes of light emitting elements within the desired range.
Claim 3
Dependent Claim
23 words
The light emitting device of claim 1 wherein the angle of divergence between said mounting edges is less than or equal to 1°.
Claim 4
Dependent Claim
28 words
The light emitting element of claim 1 wherein said copper heatsink is coated with one or more coatings selected from the group consisting of nickel, gold, and copper.
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) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |