Lanthanide oxide as an oxygen dispenser in a metal halide lamp
US8358070B2 · kind B2 · utility
1Cited by
13References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2008 |
| Grant date | Jan 22, 2013 |
| Priority date | — |
| Expiry date | Aug 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/827
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lamp includes a discharge vessel. Tungsten electrodes extend into the discharge vessel. An ionizable fill is sealed within the vessel. The fill includes a buffer gas and a halide component that includes a rare earth halide. A source of oxygen which includes a lanthanide oxide is present in the discharge vessel. The source of oxygen provides oxygen for a regenerative cycle which reduces blackening of the lamp walls by tungsten from the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.