Low pressure mercury vapor fluorescent lamps
US6781302B2 · kind B2 · utility
4Cited by
7References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2002 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Oct 12, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/63
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A low mercury consumption electric lamp is provided having a a layer of a luminescent material comprising a phosphor derived from a mixture of a blue-halo calcium halophosphate phosphor having an average particle size within the range of about 6.6 to about 10 microns; a calcium-yellow calcium halophosphate phosphor having an average particle size within the range of about 9.0 to about 13 microns; and fines of a warm-white calcium halophosphate phosphor, preferably having an average particle size of about 4.62.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.