Electrodeless fluorescent lamp having an insulative housing arrangement
US5668433A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1994 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | Dec 15, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J65/048
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrodeless fluorescent lamp comprises a sealed lamp vessel containing a fill capable of sustaining a discharge when suitably excited. The fill is excited by an RF electromagnetic field produced by a winding energized by an RF oscillator powered via a rectifier from the mains. To confine the RF field within the vessel a conductive coating FTO is provided inside the vessel. To at least reduce conducted interference a conductive coating A1 is provided on the outside of the vessel G. The coating A1 is electrically coupled (e.g., via 7) to RF ground which may be one side of the mains. An electrically insulative housing covers the coating A1. The housing which extends to a zone of maximum diameter of the vessel may grip the vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.