High efficacy lamp in a configured chamber
US7138765B2 · kind B2 · utility
1Cited by
5References
16Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 8, 2003 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Mar 29, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/827
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An arc discharge metal halide lamp having a discharge chamber having visible light permeable walls bounding a discharge region supported electrodes in a discharge region spaced apart by a distance Le with an average interior diameter equal to D so they have a selected ratio. Ionizable materials are provided in this chamber involving a noble gas, one or more halides, and mercury in an amount sufficiently small so as to result in a relatively low maximum voltage drop between the electrodes during lamp operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.