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:
Feb. 07, 2017
Filed:
Oct. 22, 2013
Koninklijke Philips N.v., Eindhoven, NL;
Volker Weiler, Eindhoven, NL;
Peter Josef Schmidt, Eindhoven, NL;
Hans-Helmut Bechtel, Eindhoven, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
The invention provides a lighting unit comprising a source of blue light, a source of green light, a first source of red light comprising a first red luminescent material, configured to provide red light with a broad band spectral light distribution, and a second source of red light comprising a second red luminescent material, configured to provide red light with a spectral light distribution comprising one or more red emission lines. Especially, the first red luminescent material comprises (Mg,Ca,Sr)AlSiN:Eu and/or (Ba,Sr,Ca)SiAlON:Eu, and the second red luminescent material comprises KSiF:Mn.