Resistively ballasted gaseous discharge lamp circuit and method
US6674249B1 · kind B1 · utility
8Cited by
17References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 25, 2000 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Oct 25, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit and method for running a metal halide arc discharge lamp from an AC power source. The circuit includes a rectifier for producing a DC voltage. The lamp is resistively ballasted by a current limiting filament connected in series with the lamp. The circuit includes a switch that closes during start up of the lamp so that the resistive filament is energized to provide immediate light prior to the lamp entering the normal run mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.