Method of forming a protective bi-layer coating on phosphore particles
US5051277A · kind A · utility
26Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1990 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Jan 22, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The method of making a bi-layer coating on phosphor particles is disclosed. The first layer surrounding the phosphor is silica. The second layer surrounding the phosphor is alumina. The bi-layer phosphor is useful in fluorescent lamps providing improved maintenance and brightness. The bi-layer phosphor can also be used in high color rendition lamps employing blends of phosphors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.