US 12,264,787 B2
LED filament arrangement
Ties Van Bommel, Horst (NL); and Rifat Ata Mustafa Hikmet, Eindhoven (NL)
Assigned to SIGNIFY HOLDING, B.V., Eindhoven (NL)
Appl. No. 17/770,670
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Oct. 21, 2020, PCT No. PCT/EP2020/079635
§ 371(c)(1), (2) Date Apr. 21, 2022,
PCT Pub. No. WO2021/083765, PCT Pub. Date May 6, 2021.
Claims priority of application No. 19206407 (EP), filed on Oct. 31, 2019.
Prior Publication US 2022/0364685 A1, Nov. 17, 2022
Int. Cl. F21K 9/232 (2016.01); F21K 9/23 (2016.01); F21Y 103/10 (2016.01); F21Y 103/20 (2016.01); F21Y 107/70 (2016.01); F21Y 115/10 (2016.01)
CPC F21K 9/232 (2016.08) [F21K 9/23 (2016.08); F21Y 2103/10 (2016.08); F21Y 2103/20 (2016.08); F21Y 2107/70 (2016.08); F21Y 2115/10 (2016.08)] 15 Claims
OG exemplary drawing
 
1. A light emitting diode, LED, filament arrangement, comprising
n sets of LED filaments, each filament comprising an array of a plurality of light emitting diodes, LEDs, wherein the LEDs are attached to a single carrier, wherein the at least one LED filament is of an elongated shape, and at least partially extends along an axis, A, and
wherein each LED filament comprises a bifurcation from which the LED filament forks into at least two branches of which at least one of the branches is arranged at an angle with respect to the axis A, the angle represented by the symbol a,
wherein each LED filament comprises an encapsulant integrally enclosing the LED filament including the at least two branches and the bifurcation, and
wherein at least one LED filament of a (k+1)th set of LED filaments constitutes at least one branch of the at least one LED filament of a kth set of LED filaments, in an iterative manner from k=1, 2, . . . , n−1, such that the n sets of LED filaments constitute a tree structure of LED filaments with at least one bottom end LED filament branch and two or more opposite top end LED filament branches of the tree structure.