The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 21, 2011
Filed:
Sep. 24, 2004
Herbert Brunner, Sinzing, DE;
Tim Fiedler, München, DE;
Frank Jermann, München, DE;
Jörg Strauβ, Regensburg, DE;
Martin Zachau, Geltendorf, DE;
Herbert Brunner, Sinzing, DE;
Tim Fiedler, München, DE;
Frank Jermann, München, DE;
Jörg Strauβ, Regensburg, DE;
Martin Zachau, Geltendorf, DE;
OSRAM Gesellschaft mit beschränkter Haftung, München, DE;
Osram Opto Semiconductors GmbH, Regensburg, DE;
Abstract
LED with a low color temperature up to 3500 K, comprising a blue-emitting LED with two phosphors in front of it, a first phosphor from the class of the oxynitridosilicates, having a cation M, which is doped with divalent Europium, and has the empirical formula M)SiON:D, with M=Sr, or M=SrBaCawith x+y<0.5 being used, the oxynitridosilicate completely or predominantly comprising the high-temperature-stable modification HT, and a second phosphor from the class of the nitridosilicates of formula (Ca,Sr)SiN:Eu.