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:
Nov. 02, 2010
Filed:
Sep. 24, 2004
Herbert Brunner, Sinzing, DE;
Tim Fiedler, München, DE;
Frank Jermann, München, DE;
Martin Zachau, Geltendorf, DE;
Herbert Brunner, Sinzing, DE;
Tim Fiedler, München, DE;
Frank Jermann, München, DE;
Martin Zachau, Geltendorf, DE;
OSRAM Gesellschaft mit beschränkter Haftung, München, DE;
Osram Opto Semiconductors GmbH, Regensburg, DE;
Abstract
The illumination system makes simultaneous use of the color-mixing principle from blue, green and red (RGB mixing) and the principle of converting of a primary radiation emitted by an LED into light with a longer wavelength by a phosphor which absorbs this radiation, with at least two LEDs being used, of which a first LED emits primarily in the range from 340 to 470 nm (dominant wavelength) and a second LED emits in the red region at 600 to 700 nm (dominant wavelength), wherein the green component is produced by the primary radiation of the first LED being at least partially converted by a green-emitting phosphor, the green-emitting phosphor used being a phosphor from the class of the oxynitridosilicates, having a cation M and the empirical formula MSiON:D, M comprising Sr as a constituent and D being doped with divalent europium, where M=Sr or M=SrBaCawith x+y<0.5 is used, the oxynitridosilicate completely or predominantly comprising the high-temperature-stable modification HT.