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. 16, 2012
Filed:
Apr. 01, 2009
Johannes Petrus Maria Ansems, Eindhoven, NL;
Lars Rene Christian Waumans, Eindhoven, NL;
Johannes Petrus Maria Ansems, Eindhoven, NL;
Lars Rene Christian Waumans, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention provides an illumination device () with a light emitting diode (), a transmissive support () comprising a luminescent material (), and a translucent exit window (). The ratio of the diffuser cavity cross section () and LED cavity cross section () is larger than (). With the proposed illumination device (), the lamp may in particular look white when it is in the off-state and illuminated with white light. Other advantages are that an intrinsically efficient system may be provided and that a warm white option may be provided.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile