Electric lamp and discharge devices – With electrical shield or static charge distribution means
Patent
1994-12-15
1997-09-16
O'Shea, Sandra L.
Electric lamp and discharge devices
With electrical shield or static charge distribution means
313489, 313635, 315 85, H01J 152, H01J 162, H01J 1716
Patent
active
056684339
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.
REFERENCES:
patent: 5239238 (1993-08-01), Bergervoet
patent: 5412280 (1995-05-01), Scott
Antonis Basil
Everest Steven J.
Corwin Stanley C.
General Electric Company
Hawranko George E.
Ning John
O'Shea Sandra L.
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