Mercury-free metal halide lamp
US6265827A · kind A · utility
24Cited by
7References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1999 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Sep 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a mercury-free metal halide lamp with an increased lamp operating voltage and prolonged lamp life without enclosing mercury or excessively increasing an inner pressure of an arc tube. A lamp in accordance with the present invention contains, as a content of a fill material 202, 0.04 mg of ScI.sub.3, 0.21 mg of NaI, 7 atm of Xe at room temperature, and 0.1 mg of YI.sub.3, which is an iodide of Y, Y having an ionization potential as a simple substance being 5 to 10 eV and a vapor pressure at a temperature of lamp operation being 10.sup.-5 or higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.