High-pressure discharge lamp and vehicle headlight with high-pressure discharge lamp
US8310156B2 · kind B2 · utility
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5Claims
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Key dates
| Filing date | Apr 11, 2008 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Apr 11, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/827
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high-pressure discharge lamp may include a discharge vessel which is sealed in a gas-tight manner and in which electrodes and an ionizable fill for generating a gas discharge are enclosed, the ionizable fill being in the form of a mercury-free fill which includes xenon and halides of the metals sodium, scandium, zinc and indium, wherein the weight ratio of the halides of zinc and indium is in the range of from 20 to 100, and wherein the coldfilling pressure of xenon is in the range of from 1.3 megapascal to 1.8 megapascal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.