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. 17, 2024
Filed:
Mar. 29, 2022
Signify Holding B.v., Eindhoven, NL;
Martinus Arnoldus Cornelis Heijmans, Veldhoven, NL;
Jan De Graaf, Uden, NL;
Aldegonda Lucia Weijers, Eindhoven, NL;
Eric Cornelis Egbertus Van Grunsven, Someren, NL;
SIGNIFY HOLDING B.V., Eindhoven, NL;
Abstract
The invention provides an LED filament device () comprising (i) a first LED filament side (), (ii) a second LED filament side (), (iii) an intermediate layer (), and (iv) a plurality of sources of light (), wherein: (a) first sources of light () are configured to generate first white light () having a first correlated color temperature CCT; wherein the first sources of light () are associated to the first filament side (); (b) second sources of light () are configured to generate second white light () having a second correlated color temperature CCT; wherein the second sources of light () are associated to the first filament side (); wherein CCT−CCT≥500 K; (c) third sources of light () are configured to generate blue third light (); wherein the third sources of light () are associated to the second filament side (); (d) fourth sources of light () are configured to generate green fourth light (); wherein the fourth sources of light () are associated to the second filament side (); (c) fifth sources of light () are configured to generate red fifth light (); wherein the fifth sources of light () are associated to the second filament side (); () the intermediate layer () comprises a thermally conductive element (); and (g) the first LED filament side (), the second LED filament side (), and (iii) the intermediate layer () are comprised by a sandwich arrangement (), wherein the intermediate layer () is configured between at least part of the first LED filament side () and at least part of the second LED filament side ().