Magnesium oxide-containing barrier layer for thick dielectric electroluminescent displays
US7915819B2 · kind B2 · utility
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47Claims
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Key dates
| Filing date | Apr 13, 2006 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Apr 2, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A novel laminate is provided to improve the operating stability of thioaluminate based phosphors used in ac thick film dielectric electroluminescent displays. The novel structure comprises a rare earth activated alkaline earth thioaluminate phosphor thin film layer and a magnesium oxide or magnesium oxide containing layer provided directly adjacent and in contact with the bottom of the phosphor thin film layer. The invention is particularly applicable to 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.