Fine-grained rare earth activated zinc sulfide phosphors for electroluminescent displays
US7534504B2 · kind B2 · utility
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5References
31Claims
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Assignee
Inventors
Key dates
| Filing date | Aug 27, 2003 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Oct 10, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved fine grained zinc sulfide phosphor is provided for use in ac electroluminescent displays. The fine-grained zinc sulfide phosphor film exhibits improved luminance and may be used in conjunction with a structure or substance to minimize or prevent reaction of the fine grained phosphor with oxygen. The invention is particularly applicable to zinc sulfide phosphors used in electroluminescent displays that employ thick dielectric layers subject to high processing temperatures to form and activate the phosphor films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.