US 12,435,844 B2
LED filament with heat sink
Ties Van Bommel, Horst (NL); and Rifat Ata Mustafa Hikmet, Eindhoven (NL)
Assigned to SIGNIFY HOLDING B.V., Eindhoven (NL)
Appl. No. 18/697,816
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Oct. 3, 2022, PCT No. PCT/EP2022/077454
§ 371(c)(1), (2) Date Apr. 2, 2024,
PCT Pub. No. WO2023/057380, PCT Pub. Date Apr. 13, 2023.
Claims priority of application No. 21200925 (EP), filed on Oct. 5, 2021.
Prior Publication US 2024/0410536 A1, Dec. 12, 2024
Int. Cl. F21K 9/237 (2016.01); F21V 5/00 (2018.01); F21V 11/14 (2006.01); F21V 29/70 (2015.01); F21Y 113/17 (2016.01); F21Y 103/10 (2016.01); F21Y 113/00 (2016.01); F21Y 115/10 (2016.01)
CPC F21K 9/237 (2016.08) [F21V 5/002 (2013.01); F21V 11/14 (2013.01); F21V 29/70 (2015.01); F21Y 2103/10 (2016.08); F21Y 2113/17 (2016.08); F21Y 2113/30 (2023.05); F21Y 2115/10 (2016.08)] 15 Claims
OG exemplary drawing
 
1. A light emitting diode, LED, filament, configured to emit LED filament light, comprising
an array of a plurality of light emitting diodes, LEDs, configured to emit LED light,
a carrier arranged along a longitudinal axis of the LED filament and configured to support the plurality of LEDs,
at least one heat sink arranged in thermal connection with the carrier for a dissipation of heat from the plurality of LEDs during operation, the at least one heat sink having a base portion extending parallel to the carrier along the longitudinal axis of the LED filament, and a plurality of fins projecting perpendicularly from the base portion relative to the longitudinal axis of the LED filament, and
an encapsulant comprising a translucent material, the encapsulant at least partially enclosing the plurality of LEDs, the carrier, and the at least one heat sink,
wherein the at least one heat sink has a metal foil, and the base portion of the at least one heat sink has a plurality of apertures configured to transmit at least part of the LED filament light through the plurality of apertures.