Solid-state fluorescent lamp ballast
US4388563A · kind A · utility
50Cited by
12References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 26, 1981 |
| Grant date | Jun 14, 1983 |
| Priority date | — |
| Expiry date | May 26, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved solid-state fluorescent lamp ballast circuit in which rectified line voltage is chopped, utilizing high power field effect transistors, to provide a high frequency input to a fluorescent lamp, thus permitting smaller reactive components to be utilized. Also shown is circuitry whereby the duty cycle of the chopping switches may be modulated to permit dimming of the lamp, which may be remotely located.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.