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:
Aug. 21, 2012
Filed:
Nov. 30, 2007
Hans-helmut Bechtel, Roetgen, DE;
Wolfgang Busselt, Roetgen, DE;
Peter J. Schmidt, Aachen, DE;
Joerg Meyer, Aachen, DE;
Hans-Helmut Bechtel, Roetgen, DE;
Wolfgang Busselt, Roetgen, DE;
Peter J. Schmidt, Aachen, DE;
Joerg Meyer, Aachen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An illumination device includes an active layer, such as a blue LED, covered with a first luminescent ceramic converter layer and partially covered with a second luminescent ceramic converter layer. The first and second conversion layers convert primary photons emitted by the active layer into photons of different, longer wavelengths. The color point of the illumination device can be adjusted by adjusting the relative size of the second conversion layer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile