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:
Aug. 08, 2023
Filed:
Sep. 11, 2020
Signify Holding B.v., Eindhoven, NL;
SIGNIFY HOLDING B.V., Eindhoven, NL;
Abstract
There is provided a light emitting diode, LED, filament lamp () which provides LED filament lamp light ('). The LED filament lamp () comprises at least one LED filament () which has a LED filament length (L) which extends from a first end () to a second end (). The at least one LED filament () provides LED filament light () and comprises an array () of a plurality of LEDs () and an encapsulant (). The array () of a plurality of LEDs () provide LED light (′) and extend along the LED filament length (L). The encapsulant () is at least partially enclosing the plurality of LEDs (). The encapsulant () comprises a light scattering material (). In the direction from the first end () to the second end () at least one of (i) the thickness (TL) of the encapsulant (), and (ii) the concentration (CL) of the light scattering material () in the encapsulant (), along the LED filament length (L) increases over at least two adjacent first LEDs () and decreases over at least two adjacent second LEDs () different from the at least two adjacent first LEDs (), and wherein the thickness (TL) and/or concentration (CL) firstly increases and secondly decreases at least along a portion of the LED filament length (L).