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:
Jul. 18, 2017
Filed:
Oct. 17, 2014
Koninklijke Philips N.v., Eindhoven, NL;
Daniel Roitman, San Jose, CA (US);
Mark Melvin Butterworth, Santa Clara, CA (US);
Matthias Heidemann, Alsdorf, DE;
Hans Helmut Bechtel, Roetgen, DE;
Danielle Russell Chamberlin, Belmont, CA (US);
Joan Liu, San Jose, CA (US);
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
A light emission device comprising a light emitting element, a wavelength conversion (e.g. phosphor) element, and a filter that reduces Color over Angle (CoA) effects by at least partially reflecting light from the light emitting element that strike the filter at near-normal angles of incidence. In some embodiments, a combined phosphor and filter layer is formed over the LED die. The filter may comprise a dispersion of self-aligning moieties, such as dielectric platelets in a film that is vacuum laminated to the LED structure. Xirallic® Galaxy Blue pigment, comprising an aluminum oxide core coated on both sides with thin films of SnO, and TiO, and Ronastar® Blue, comprising Calcium Aluminum Borosilicate and TiOmay provide the dielectric platelets.