US5047686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single layer multi-color luminescent display
Assignee: National Aeronautics and Space Administration
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Filing: 1987-12-31
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Granted: 1991-09-10
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Expires: 2007-12-31
Abstract
Abstract The invention is a multi-color luminescent display 10 comprising an insulator substrate 11 and a single layer of host material 13 which may be a phosphor deposited thereon that hosts one or more differential impurities 14, therein forming a pattern of selected and distinctly colored phosphors such as blue, green, and red phosphors in the single layer of host material 13. Transparent electrical conductor means 12 may be provided for subjecting selected portions of the pattern of colored phosphors to an electric field thereby forming a multi-color, single layer electroluminescent display.
Inventors
- 👤 James B. Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:37
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145; H05B33/10; H05B33/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
90 words
A multi-color luminescent surface comprising: an insulator substrate; and a single layer of host material formed of ZnS and having a smooth top surface on said substrate, said single layer of host material including impurities formed of Mg, TbF3, and Mn hosted therein in selected areas forming a pattern of blue, green and red phosphors of ZnS:Mg, ZnS:TbF 3 , and ZnS:Mn:TbF 3 , respectively within said single layer of ZnS host material; and an insulating layer over said smooth top surface of said single layer of ZnS host material.
Claim 2
Dependent Claim
90 words
A multi-color luminescent surface comprising: an insulator substrate; and a single layer of host material formed of ZnS and having a smooth top surface on said substrate, said single layer of host material including impurities formed of Mg, TbF3, and Mn hosted therein in selected areas forming a pattern of blue, green and red phosphors of ZnS:Mg, ZnS:TbF 3 , and ZnS:Mn:TbF 3 , respectively within said single layer of ZnS host material; and an insulating layer over said smooth top surface of said single layer of ZnS host material.
Claim 3
Dependent Claim
93 words
A multi-color luminescent surface comprising: an insulator substrate; and a single layer of host material formed of SrS and having a smooth top surface on said substrate, said single layer of host material including impurities formed of Ce 2 S 3 and CeFT 3 , hosted therein in selected areas forming a pattern of red and green phosphors of SrS:Ce 2 S 3 and SrS:CeF 3 , respectively within said single layer of SrS host material; and an insulating layer over said smooth top surface of said single layer of SrS host material.
Claim 4
Dependent Claim
93 words
A multi-color luminescent surface comprising: an insulator substrate; and a single layer of host material formed of SrS and having a smooth top surface on said substrate, said single layer of host material including impurities formed of Ce 2 S 3 and CeFT 3 , hosted therein in selected areas forming a pattern of red and green phosphors of SrS:Ce 2 S 3 and SrS:CeF 3 , respectively within said single layer of SrS host material; and an insulating layer over said smooth top surface of said single layer of SrS host material.
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) | 1994-09-09 | 1995-03-11 | 1995-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-09 | 1999-03-11 | 1999-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-09 | 2003-03-11 | 2003-09-10 | $7700.00 | Window Closed / Lapsed |