Electric high-pressure discharge lamp for use as a motor vehicle headlamp
US5051658A · kind A · utility
4Cited by
11References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1990 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Oct 2, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/56
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The lamp has a holder body in which an end portion of the discharge vessel is secured. A light-receiving window of a photoelectrical element is positioned inside the holder body and aimed at a sealed end portion of the discharge vessel. The photoelectrical element may be connected to the control of the electric supply of the lamp in order to obtain a high luminous flux within a short period after ignition of the lamp. External factors have little influence on the control action thanks to the position of the window.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.