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. 25, 2024
Filed:
Oct. 06, 2020
Signify Holding B.v., Eindhoven, NL;
SIGNIFY HOLDING, B.V., Eindhoven, NL;
Abstract
A light emitting diode, LED, filament lamp (), comprising at least one LED filament () having abase portion () and a top portion () extending over a length, L, along a longitudinal axis, A, wherein the LED filament comprises an array of a plurality of light emitting diodes, LEDs, () extending along the longitudinal axis A. An encapsulant () at least partially enclosing the plurality of LEDs, wherein the encapsulant comprises a luminescent material (). The linear array of LEDs () comprising a plurality N of blue LEDs () emitting blue light and a plurality of M red LEDs () emitting red light, the linear array of LEDs () comprising a density of blue LEDs and a density of red LEDs, The density of blue LEDs decreases and/or the density of red LEDs increases from the base portion () to the top portion () along at least a portion of the length (L), whereby the color temperature, CT, of the light emitted from the at least one LED filament decreases from the base portion () to the top portion () over at least a portion of the length of the at least one LED filament.