Phosphor particle, fluorescent lamp, and manufacturing method
US4825124A · kind A · utility
33Cited by
42References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1987 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Apr 29, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A phosphor particle having a non-particulate, conformal aluminum oxide coating and a fluorescent lamp incorporating aluminum oxide coated phophor particles are disclosed. A method for improving the lumen maintenance of a fluorescent lamp is also disclosed. The method involves applying a non-particulate, conformal aluminum oxide coating to the outer surface of individual particles of a finely-divided fluorescent lamp phosphor, applying the coated phosphor particles to a fluorescent lamp envelope, and processing the phosphor coated envelope into a finished lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.