US3611069A
Expired / Lapsed
US
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Multiple color light emitting diodes
Assignee: General Electric Co
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Filing: 1969-11-12
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Granted: 1971-10-05
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Expires: 1989-11-12
Abstract
Abstract Multiple color light-emitting semiconductor structures and methods for fabricating them are disclosed. The light-emitting structures comprise multiple-layered regions of differing conductivity-type semiconductor materials such as compositions of gallium phosphide which are made to emit light of selectively different wavelengths. The characteristics of the light-emitting structures are enhanced by lowering the optical absorption of high-energy photons by the use of a material with an increased band-gap.
Inventors
- 👤 Simeon V Galginaitis
- 👤 Gunther E Fenner
- 👤 Roger S Ehle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:18
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/822; H10H20/824; H10H20/01; H10H20/011; H10H20/013; H10H20/813; H10P; H10P14/00; H10P14/20; H10P14/26; H10P14/263; H10P14/265; H10P14/29; H10P14/2901; H10P14/2907; H10P14/2909; H10P14/32; H10P14/3202; H10P14/3214; H10P14/3218; H10P14/34; H10P14/3402; H10P14/3414; H10P14/3418; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/049; Y10S148/065; Y10S148/067; Y10S148/099; Y10S148/107; Y10S148/119; Y10S438/00; Y10S438/956
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
34 words
The multiple color light-emitting structure of claim 1 wherein said third layer has a surface which interfaces with the medium of transmission and light emission from said first and second light-emitting junctions passes therethrough.
Claim 2
Dependent Claim
25 words
The multiple color light-emitting structure of claim 1 wherein said light-emitting junctions are of substantially the same area and in axial alignment with each other.
Claim 3
Dependent Claim
26 words
The multiple color light-emitting structure of claim 1 wherein said first light-emitting junction has an emission of a lower photon energy than said second light-emitting junction.
Claim 4
Dependent Claim
135 words
A multiple color light-emitting structure comprising: a first layer of one conductivity-type gallium phosphide; a second layer of an opposite conductivity-type gallium phosphide overlying said first layer and forming therewith a first light-emitting junction at the interface; a third layer of said opposite conductivity-type gallium phosphide overlying said second layer; and a fourth layer of said one conductivity-type gallium phosphide overlying said third layer and forming therewith a second light-emitting junction, said third and/or said fourth layers having a higher band gap than said first and second layers for reducing absorption of light passing therethrough wherein said higher band gap layers include compositions of gallium aluminum phosphide, (GaxA1(1 x)P), where X varies from 0 to 1. means for forward biasing said first and/or second light emitting junctions separately or simultaneously to cause light emission therefrom.
Claim 5
Dependent Claim
46 words
The multiple color light-emitting structure of claim 5 wherein the emission from said first light-emitting junction has a lower photon energy than from said second light-emitting junction and said second light-emitting junction is located closer to the light-emitting surface which interfaces with the media of transmission.
Claim 6
Dependent Claim
25 words
The multiple color light-emitting structure of claim 5 wherein said light-emitting junctions are of substantially the same area and in axial alignment with each other.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |