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:
Jun. 02, 2020
Filed:
Oct. 12, 2016
Signify Holding B.v., Eindhoven, NL;
Wouter Oepts, Eindhoven, NL;
Martinus Petrus Joseph Peeters, Eindhoven, NL;
SIGNIFY HOLDING B.V., Eindhoven, NL;
Abstract
The invention provides a lighting device () comprising a solid state light source () configured to provide blue light () having a dominant wavelength selected from the range of 440-490 nm, a first luminescent material () configured to convert part of the blue light () into first luminescent material light () having intensity in one or more of the green and yellow having a CIE u' (), and a second luminescent material () configured to convert part of one or more of the blue light () and the first luminescent material light () into second luminescent material light () having intensity in one or more of the orange and red having a CIE u′ (), wherein the first luminescent material () and the second luminescent material () are selected to provide said first luminescent material light () and said second luminescent material light () defined by a maximum ratio of CIE u′ () and CIE u′ () being CIE u′()=1.58*CIE u′()+0.255, and a minimum ratio of CIE u′ () and CIE u′ () being CIE u′()=2.3*CIE u′()+0.04.