Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Reexamination Certificate
2005-02-10
2009-11-03
Koslow, C. Melissa (Department: 1793)
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
C313S503000, C257S098000
Reexamination Certificate
active
07611641
ABSTRACT:
An illumination system includes a radiation source and a fluorescent material including at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light. The phosphor includes a yellow red-emitting cerium-activated carbido-nitridosilicate of general formula (RE1−z)2−aEAaSi4N6+aC1−a:Cezwhere 0≦a<1, 0<z≦0.2, EA is at least one earth alkaline metal selected from the group of calcium, strontium and barium, and RE is a least one rare earth metal chosen from the group of yttrium, gadolinium and lutetium. The phosphor may include a red to yellow-emitting cerium-activated carbido-nitridosilicate of general formula (RE1−z)2−aEAaSi4N6+aC1−a:Cezwhere 0≦a<1, 0<z≦0.2, EA is at least one earth alkaline metal selected from the group of calcium, strontium and barium, and RE is a least one rare earth metal chosen from the group of yttrium, gadolinium and lutetium.
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Höppe Henning
Jüstel Thomas
Schmidt Peter J.
Schnick Wolfgang
Koninklijke Philips Electronics , N.V.
Koslow C. Melissa
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