Thallium free—metal halide lamp with magnesium and cerium halide filling for improved dimming properties
US6501220B1 · kind B1 · utility
16Cited by
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5Claims
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Key dates
| Filing date | Oct 18, 2000 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Jun 20, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/125
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thallium-free high pressure ceramic metal halide lamp having superior dimming characteristics with a fill composition comprising MgI2 and CeI3. In addition, the fill chemistry comprises NaI and the halides of rare earth metals such as Dy, Ho and Tm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.