Dimming system and method for magnetically ballasted gaseous discharge lamps
US6271635A · kind A · utility
3Cited by
14References
62Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1999 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Jan 11, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dimming system and method suitable for any type of magnetic ballast operating a gaseous discharge lamp. The dimming system operates to selectively vary the number of turns of the ballast winding in operative connection with the lamp to thereby effect a change in the impedance of the ballast, the power provided to the lamp, and ultimately the brightness of the lamp. The system may be operated such that the brightness of the lamp is selected responsive to the detection of an external stimulus such as motion or sound within the space to be illuminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.