US4126812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spherical light emitting diode element and character display with integral reflector
Assignee: Texas Instruments Inc
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Filing: 1976-12-20
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Granted: 1978-11-21
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Expires: 1996-12-20
Abstract
Abstract Light emitting p-n junction diode elements in the form of small spheres having an outer layer of semiconductor material of one conductivity type and a subsurface layer of semiconductor material of an opposite conductivity type are mounted to one surface of an insulating substrate member in holes of a proper size to allow a portion of each diode element to protrude past the other surface of the substrate; metallic coatings on one surface of the substrate provide electrical contacts to the outer layers of the spheres and metallic coatings on the other surface of the substrate provide electrical contact to the subsurface semiconductor layer of the spheres in an area where the surface layer has been removed.
Inventors
- 👤 Gene F. Wakefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:51
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/819; G; G09; G09F; G09F9/00; G09F9/30; G09F9/302; G09F9/3023; G09F9/33; H10H20/821; H10W; H10W90/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
An LED array comprising an insulating support member having two major surfaces and a plurality of openings communicating between said major surfaces, a plurality of generally spherical semiconductor diode elements, said elements each having a subsurface p-n junction and being of sufficiently large diameter to prevent their passing completely through said openings, each of said diode elements being disposed partially within one of said openings from a first side of said opening, means adjacent a first one of said major surfaces of said member providing electrical connection to said diode elements on a first side of said p-n junction and means adjacent the other of said major surfaces of said member providing electrical connection to said diode elements on the other side of said p-n juncture.
Claim 2
Dependent Claim
126 words
An LED array comprising an insulating support member having two major surfaces and a plurality of openings communicating between said major surfaces, a plurality of generally spherical semiconductor diode elements, said elements each having a subsurface p-n junction and being of sufficiently large diameter to prevent their passing completely through said openings, each of said diode elements being disposed partially within one of said openings from a first side of said opening, means adjacent a first one of said major surfaces of said member providing electrical connection to said diode elements on a first side of said p-n junction and means adjacent the other of said major surfaces of said member providing electrical connection to said diode elements on the other side of said p-n juncture.
Claim 3
Dependent Claim
27 words
An LED array as defined in claim 1 wherein said openings are larger at one of said major surfaces than at the other of said major surfaces.
Claim 4
Dependent Claim
14 words
An LED array as defined in claim 2 wherein said openings define conical sections.
Claim 5
Dependent Claim
14 words
An LED array as defined in claim 2 wherein said openings define pyramidal sections.
Claim 6
Dependent Claim
17 words
An LED array as defined in claim 2 wherein the walls of said openings have reflective coatings.
Claim 7
Dependent Claim
17 words
The LED array as defined in claim 3 wherein the walls of said openings have reflective coatings.
Claim 8
Dependent Claim
17 words
The LED array as defined in claim 4 wherein the walls of said openings have reflective coatings.
Claim 9
Dependent Claim
32 words
The LED array of claim 5 wherein said reflective coatings are electrically conductive and act as said means providing electrical connection to said diode element on one side of said p-n junction.
Claim 10
Dependent Claim
17 words
The LED array as defined in claim 8 wherein the openings are grouped to provide seven-segment characters.
Claim 11
Dependent Claim
33 words
The LED array as defined in claim 8 wherein said openings are grouped to provide seven-segment display characters and the elements of each group comprising a single segment are electrically connected in parallel.
References Cited (Backward Citations)
US3302051A
Cited
US3480818A
Cited
US3711789A
Cited
US3821590A
Cited
US3858341A
Cited
US3780357A
Cited
US3918052A
Cited
US4000437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |