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Phosphor blends for high-CRI fluorescent lamps

United States Patent

June 24, 2008
View the Complete Patent at the US Patent & Trademark Office
A phosphor blend comprises at least two phosphors each selected from one of the groups of phosphors that absorb UV electromagnetic radiation and emit in a region of visible light. The phosphor blend can be applied to a discharge gas radiation source to produce light sources having high color rendering index. A phosphor blend is advantageously includes the phosphor (Tb,Y,LuLa,Gd).sub.x(Al,Ga).sub.yO.sub.12:Ce.sup.3+, wherein x is in the range from about 2.8 to and including 3 and y is in the range from about 4 to and including 5.
Setlur; Anant Achyut (Niskayuna, NY), Srivastava; Alok Mani (Niskayuna, NY), Comanzo; Holly Ann (Niskayuna, NY), Manivannan; Venkatesan (Clifton Park, NY), Beers; William Winder (Chesterland, OH), Toth; Katalin (Pomaz, HU), Balazs; Laszlo D. (Budapest, HU)
General Electric Company (Niskayuna, NY)
10/ 064,129
June 13, 2002
FEDERAL RESEARCH STATEMENT This invention was first conceived or reduced to practice in the performance of work under contract DE-FC26-99FT40632 awarded by the United States Department of Energy. The United States of America may have certain rights to this invention.