Moisture-resistant electroluminescent phosphor with high initial brightness and method of making
US7833437B2 · kind B2 · utility
20Cited by
20References
18Claims
0Family size
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Key dates
| Filing date | Jan 12, 2007 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Jan 10, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2993
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is an electroluminescent phosphor wherein each individual phosphor particle is encapsulated in an inorganic coating applied by an atomic layer deposition (ALD) coating method. In a preferred embodiment, the coating is aluminum oxyhydroxide. The encapsulated phosphor shows an extreme insensitivity to atmospheric moisture and suffers only minor loss of initial brightness in lamps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.