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:
Sep. 26, 2023
Filed:
Oct. 20, 2020
Signify Holding B.v., Eindhoven, NL;
Hugo Johan Cornelissen, Escharen, NL;
Rifat Ata Mustafa Hikmet, Eindhoven, NL;
Olexandr Valentynovych Vdovin, Maarheeze, NL;
Rene Theodorus Wegh, Veldhoven, NL;
Ties Van Bommel, Horst, NL;
Christoph Gerard August Hoelen, Valkenswaard, NL;
Robert Van Asselt, Valkenswaard, NL;
SIGNIFY HOLDING B.V., Eindhoven, NL;
Abstract
The invention provides a light generating device () configured to generate device light (), wherein the light generating device () comprises a first light source (), a first luminescent material (), a second light source () of second light source light (), and a second light source (), wherein: the first light source () is configured to generate blue first light source light () having a first peak wavelength λselected from the spectral wavelength range of 437-472 nm, wherein the first light source () is a first laser light source (); the first luminescent material () is configured to convert at least part of the first light source light () into first luminescent material light () having an emission band having wavelengths in one or more of (a) the green spectral wavelength range and (b) the yellow spectral wavelength range, wherein the first luminescent material () comprises a luminescent material of the type ABO:Ce, wherein A comprises one or more of Y, La, Gd, Tb and Lu, especially (at least) one or more of Y, Gd, Tb and Lu, and wherein B comprises one or more of Al, Ga, In and Sc; the second light source () of second light source light () is configured to provide the second light source light () having an emission band having a dominant wavelength or peak wavelength in the spectral wavelength range of 580-610 nm; the second light source () is configured to generate red second light source light () having a second peak wavelength λselected from the spectral wavelength range of 630-670 nm, wherein the second light source () is a second laser light source (); the light generating device () is configured to provide in a first operational mode white device light () comprising the first light source light (), the first luminescent material light (), the second light source light (), and the second light source light (), with a correlated color temperature selected from the range of 2000-3150 K and a color rendering index (CRI) of at least 80.