Discharge lamp with internal starting electrode
US7187131B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 2004 |
| Grant date | Mar 6, 2007 |
| Priority date | — |
| Expiry date | Dec 14, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/82
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An arc discharge light source (10) for automotive headlight applications comprises an arc tube (12) having a hollow body (14) arrayed along a longitudinal axis (16) and provided with first and second ends (18, 20). The first and second ends have, respectively, first and second jointure areas (22, 24) with the hollow body (14). Electrodes (26, 28) are sealed respectively in each of the first and second ends (18, 20). An arc generating and sustaining medium is contained within the hollow body. a low-voltage-pulse starting aid (30) is associated with the arc tube and comprises an electrically conductive member (32) having an intermediate portion (34) and proximal and distal ends (36, 38). The intermediate portion (34) extends the length of the hollow body (14) and the proximal and distal ends (36, 38) each terminating in a loop (40, 42) comprised of a single turn of electrically conductive material. The loop (40) from the proximal end (36) surrounds the first jointure area (22) and the loop (42) from the distal end (38) surrounds the second jointure area (24).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.