Fluorescent lamp dimmer
US4998045A · kind A · utility
31Cited by
4References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1988 |
| Grant date | Mar 5, 1991 |
| Priority date | — |
| Expiry date | Dec 6, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fluorescent lamp dimmer, for use with one or more fluorescent lamps where large ratios of luminous differences are required, which includes apparatus for powering the arc current for the fluorescent lamps from a source of pulsating voltage of variable pulse width and variable frequency both of which can be changed by relatively small amounts and still produce very large changes (15,000:1) in luminescence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.