Fluorescent lamp dimming
US5798620A · kind A · utility
34Cited by
10References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1996 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Dec 17, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Step dimming of a fluorescent lamp load through sensing of power line interruptions generated through the toggling of a switch. The number of power line interruptions through toggling produced within a predetermined period of time identifies the level of dimming desired. In the event that interruption of power to the ballast exceeds the predetermined period of time, the lamp load will be reset to a prefixed level of illumination once power is restored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.