Illumination System Comprising a Radiation Source and a Fluorescent Material
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United States of America Patent
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Issued Date -
Nov 1, 2007
app pub date -
Jun 29, 2005
filing date -
Jul 5, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention concerns an illumination system for generation of colored, especially yellow, amber or red light, comprising a radiation source and a fluorescent material comprising 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; wherein said at least one phosphor is a yellow to red-emitting europium(II)-activated oxonitridoaluminosilicate of general formula EA.sub.2-zSi.sub.5-aAl.sub.aN.sub.8-aO.sub.a:Eu.sub.z wherein 0
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