Electrodeless high power fluorescent lamp with controlled coil temperature
AssigneeMatsushita Electric Works, Ltd.
InventorsOleg Popov, Jakob Maya, Robert Chandler
Life of this patent
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Abstract
An electrodeless lamp includes a bulbous lamp envelope enclosing an inert gas and a vaporizable metal fill, the lamp envelope having a reentrant cavity, a magnetic core positioned within the reentrant cavity, an induction coil disposed on the magnetic core, a cooling structure disposed inside the magnetic core, and a spacer structure between the magnetic core and an inside wall of the reentrant cavity. The spacer structure defines a thermally insulating gap between the magnetic core and the inside wall of the reentrant cavity to control coil/core temperature.
Claims35
An electrodeless lamp comprising:
- a bulbous lamp envelope enclosing an inert gas and a vaporizable metal fill, the lamp envelope having a reentrant cavity;
- an electromagnetic coupler positioned within said reentrant cavity;
- and
- a spacer structure disposed between said electromagnetic coupler and an inside wall of said reentrant cavity.
An electrodeless lamp comprising:
- a bulbous lamp envelope enclosing an inert gas and a vaporizable metal fill and having a phosphor material on an inside surface thereof, the lamp envelope including a reentrant cavity;
- a magnetic core positioned within said reentrant cavity;
- an induction coil disposed on said magnetic core;
- a cooling structure disposed inside said magnetic core and thermally coupled to a lamp base;
- and
- a spacer structure disposed between said magnetic core and an inside wall of said reentrant cavity.
In an electrodeless lamp including a bulbous lamp envelope having a reentrant cavity and an electromagnetic coupler positioned within the reentrant cavity, a method for enhancing performance comprising:
- controlling a spacing between the electromagnetic coupler and an inside wall of the reentrant cavity with a thermally insulating spacer structure.
An electrodeless lamp comprising:
- a bulbous lamp envelope enclosing an inert gas and a vaporizable metal fill, the lamp envelope having a reentrant cavity;
- an electromagnetic coupler positioned within said reentrant cavity;
- and
- means for defining a thermally insulating gap between the electromagnetic coupler and an inside wall of the reentrant cavity.
Dependencies are inferred from the claim text.