Metal halide lamp with ceramic discharge vessel
US9773659B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2009 |
| Grant date | Sep 26, 2017 |
| Priority date | — |
| Expiry date | Dec 15, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/827
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A discharge lamp and a method for forming the lamp, the lamp including a ceramic discharge vessel defining at least part of a cavity containing a metal halide (MH) chemical filling having a power factor of between about 0.75 and 0.85 located within the cavity; and one or more feedthroughs having first and second ends, the first end located in the cavity. The cavity may have an internal length LINT and an internal diameter DINT that are proportional to each other, such that an aspect ratio defined as LINT/DINT is less than or equal to two. The lamp may be started and operated with a probe-start ballast without an internal igniter circuit or without a starting electrode (or internal igniter).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.