High efficiency ballast for operation of electronic lamps
US5426348A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 20, 1994 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Apr 20, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides an apparatus for operating an electronic lamp from an AC line (10) and has a rectifier circuit (12), a power coupling circuit (18), a starting circuit (22), a resonant circuit (24), a feedback circuit (26), a driving circuit (28), and an output coupling circuit (30). The rectifier circuit (12) is connected to the AC line (10) and has a positive output terminal (14) and a negative output terminal (16) for providing DC operating power. The power coupling circuit (18) is connected to the DC operating power and provides power to a drive node (20. The starting circuit (22) provides a starting pulse which starts the feedback circuit (26) and the driving circuit (28) into oscillation. The resonant circuit (24) is connected to the drive node (20) and has a resonant node (32) for providing output power to the electronic lamp (40). The feedback circuit (26) is connected to the resonant node (32) of the resonant circuit (24) and provides oscillatory feedback to the driving circuit (28) so as to cause the driving circuit (28) to oscillate after providing the initial output power pulse. The driving circuit (28) is connected to the output terminals (14, 16) of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.