Constant light output circuit and electrical components based thereon
US6762569B1 · kind B1 · utility
3Cited by
11References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2003 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Jan 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/392
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for controlling the operation of a gas discharge including regulation of power provided to the lamp for maintaining constant light output throughout the lamp's life. A circuit is provided that continuously monitors the lamp voltage and current. A lamp resistance is determined by dividing the lamp voltage with the lamp current. Based on the lamp resistance, the power provided to the lamp is adjusted to maintain constant light output from the lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.