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:
Oct. 11, 2011
Filed:
Apr. 10, 2007
Peter Schmidt, Aachen, DE;
Hans-helmut Bechtel, Roetgen, DE;
Wolfgang Busselt, Roetgen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A light emitting system () comprising a radiation source () capable of emitting a first light of at least a first wavelength spectrum; a first fluorescent material () capable of absorbing at least partially the first light and emitting second light having a second wavelength spectrum; a second fluorescent material () capable of absorbing at least partially the first light and emitting a third light having a third wavelength spectrum; wherein one, the first () or the second fluorescent material () is a polycrystalline ceramic with a density of more than 97 percent of the density of a monocrystalline material and the respective other fluorescent material is a phosphor powder with a median particle size 100 nm<d<50 μm.