High-pressure discharge lamp with sealed UV-enhancer
AssigneePhilips Electronics North America Corporation
InventorsTom G. Steere, Raghu Ramaiah, Greg Nelson, Jay J. Palmer, John C. Alderman
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Abstract
A high-pressure discharge lamp is disclosed having a discharge vessel, an outer bulb enclosing said discharge vessel and defining an intervening space therebetween, a UV-enhancer positioned in the space between the outer bulb and the discharge vessel, the UV-enhancer provided with a wall fabricated of a ceramic material and an internal electrode, wherein an end portion of the UV-enhancer is closed with a compressive seal.
Claims9
A high-pressure discharge lamp which comprises:
- (a) a discharge vessel;
- (b) an outer bulb enclosing said discharge vessel and defining an intervening space therebetween;
- (c) a UV-enhancer positioned in the space between the outer bulb and the discharge vessel, the UV-enhancer provided with a wall fabricated of a ceramic material and an internal electrode, wherein an end portion of the UV-enhancer is closed with a compressive seal.
A high-pressure metal-halide lamp which comprises:
- (a) a discharge vessel containing mercury, a metal halide, and a rare gas;
- (b) an outer bulb enclosing said discharge vessel and defining an intervening space therebetween;
- (c) a UV-enhancer positioned in the space between the outer bulb and the discharge vessel, the UV-enhancer provided with a wall fabricated of a ceramic material and an internal electrode, wherein an end portion of the UV-enhancer is closed with a compressive seal.
A method of manufacturing a high pressure discharge lamp, comprising the steps of:
- a) providing a discharge vessel having an ionizable filling and a pair of electrical conductors each having a first end sealed within the discharge vessel, a lamp cap, and an electrical connection between a second end of each said electrical conductors and said lamp cap;
- b) extruding a hollow section of ceramic material;
- c) sealing a first end portion of the hollow section;
- d) heating the hollow section to a hardened state;
- e) inserting an electrode into the hollow section;
- f) sealing a second end portion of the hollow section with an ionizable filling therein to form a UV-enhancer;
- g) providing an electrical connection from said electrode to said electrical conductor;
- and
- h) enclosing said discharge vessel, said UV-enhancer, and a portion of said electrical conductors within an outer bulb.
Dependencies are inferred from the claim text.