SEF Lamp dimming
US4219760A · kind A · utility
161Cited by
2References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1979 |
| Grant date | Aug 26, 1980 |
| Priority date | — |
| Expiry date | Mar 22, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Solenoidal electric field lamps are effectively dimmed with no loss in lamp efficiency by powering the lamps with high frequency current pulses and periodically interrupting the current pulses in a time ratio fashion in order to reduce the average power being supplied to the lamp. The lamp may be dimmed from 100 to 0 percent of full power in an efficient manner as long as the pulse interruption period is less than the plasma deionization time of the lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.