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. 11, 2014
Filed:
Aug. 11, 2008
Volkmar Schulz, Wuerselen, DE;
Christoph Martiny, Aachen, DE;
Eduard Johannes Meijer, Eindhoven, NL;
Peter Vergeer, Veldhoven, NL;
Volkmar Schulz, Wuerselen, DE;
Christoph Martiny, Aachen, DE;
Eduard Johannes Meijer, Eindhoven, NL;
Peter Vergeer, Veldhoven, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
Light sensors () are used in lighting applications, especially in combination with LEDs, to control and/or adapt the color point of light sources. Costs and/or performance of the light sensor () are essential in order to guarantee cost-effective light sources with reproducible color points. This aim is achieved by a light sensor () comprising a light diffuser (), an optical non-transparent housing () having at least one window (), at least one interference filter () and at least two photo sensors (). The light diffuser () is arranged in such a way that light from outside the optical non-transparent housing () has to pass the light diffuser () so as to enter the interior of the optical non-transparent housing () via the window (). The interference filter () and the at least two photo sensors () are arranged in the interior of the optical non-transparent housing (), which interference filter () is arranged between the window () and the at least two photo sensors ().