US3783353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent semiconductor device capable of emitting light of three different wavelengths
Assignee: RCA Corp
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Filing: 1972-10-27
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Granted: 1974-01-01
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Expires: 1992-10-27
Abstract
Abstract An electroluminescent semiconductor device includes a transparent substrate having mounted on one surface a body of insulating crystalline gallium nitride and on its other surface a semiconductor diode which is capable of emitting red light. Contacts are provided for the gallium nitride body and the diode with one contact being common to each. When a voltage is applied across the gallium nitride body either blue or green light is emitted depending on the polarity of the voltage. When a voltage is applied across the diode, red light is emitted. All three colors of the emitted light can be seen through one surface of the gallium nitride body. A plurality of the electroluminescent semiconductor devices can be formed in an array to provide a flat display panel.
Inventors
- 👤 J Pankove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:26
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/822; H10H20/824; H10H20/825; H05; H05B; H05B33/00; H05B33/12; Y; Y10; Y10S; Y10S148/00; Y10S148/113; Y10S148/15; Y10S438/00; Y10S438/956
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
An electroluminescent semiconductor device in accordance with claim 1 in which the means whereby a voltage can be placed across each of said bodies includes a first contact connected to said first body, a second contact connected to said second body, and a third contact connected to both the first and second bodies in spaced relation to each of the first and second contacts.
Claim 2
Dependent Claim
34 words
An electroluminescent semiconductor device in accordance with claim 2 including a third body of electrically conductive gallium nitride on said one side of the substrate and said first body is on the third body.
Claim 3
Dependent Claim
62 words
An electroluminescent semiconductor device in accordance with claim 3 in which the second body is of a group III-V compound and mixtures thereof and has juxtaposed portions of opposite conductivity to provide a PN junction therein, the second contact is connected to one portion of the second body and the third contact is connected to the other portion of the second body.
Claim 4
Dependent Claim
31 words
An electroluminescent semiconductor device in accordance with claim 4 in which the third contact extends between and is connected to the third body and the other portion of the second body.
Claim 5
Dependent Claim
44 words
An electroluminescent semiconductor device in accordance with claim 5 in which the third contact is a metal strip which extends across an edge of the substrate and is secured to an edge of the third body and the other portion of the second body.
Claim 6
Dependent Claim
39 words
An electroluminescent semiconductor device in accordance with claim 6 in which the first contact is on the surface of the first body and a fourth contact is on the surface of the first body spaced from the first contact.
Claim 7
Dependent Claim
38 words
An array of a plurality of electroluminescent semiconductor devices each in accordance with claim 7 wherein the metal strip is elongated and a plurality of the electroluminescent semiconductor devices are mounted in spaced relation along said metal strip.
Claim 8
Dependent Claim
133 words
A display panel including a plurality of arrays each in accordance with claim 8 with the arrays being in parallel relation between two spaced, parallel plates of electrical insulating material, said arrays being positioned with the electroluminescent semiconductor devices arranged in parallel rows longitudinally along the metal strips and in parallel rows transversely of the metal strips, a plurality of spaced, parallel metal conductors on the inner surface of each of said plates with each conductor extending along a corresponding transverse row of the electroluminescent semiconductor devices, each of the conductors on one of the plates engaging the first contact on the electroluminescent semiconductor devices in its corresponding transverse row and each of the conductors on the other plate engaging the second contact on the electroluminescent semiconductor devices in its corresponding transverse row.
Claim 9
Dependent Claim
26 words
A display panel in accordance with claim 9 in which the plate which is adjacent the first body of the electroluminescent semiconductor devices is optically transparent.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |