US 11,808,417 B2
LED filament device pleasant in appearance and improved spatial light distribution through the formation of intentional complications in cordage
Peter Johannes Martinus Bukkems, Deurne (NL); Ties Van Bommel, Horst (NL); Rifat Ata Mustafa Hikmet, Eindhoven (NL); and Johannes Petrus Maria Ansems, Hulsel (NL)
Assigned to SIGNIFY HOLDING B.V., Eindhoven (NL)
Appl. No. 17/628,450
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Jul. 15, 2020, PCT No. PCT/EP2020/070041
§ 371(c)(1), (2) Date Jan. 19, 2022,
PCT Pub. No. WO2021/013656, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 19187505 (EP), filed on Jul. 22, 2019.
Prior Publication US 2022/0364691 A1, Nov. 17, 2022
Int. Cl. F21S 4/15 (2016.01); F21V 9/30 (2018.01); F21S 4/24 (2016.01); F21K 9/232 (2016.01)
CPC F21S 4/15 (2016.01) [F21K 9/232 (2016.08); F21S 4/24 (2016.01); F21V 9/30 (2018.02)] 14 Claims
OG exemplary drawing
 
1. A light emitting device comprising:
a plurality of LED filaments, each filament comprising a flexible substrate and a plurality of LED light sources arranged on the flexible substrate, and
an encapsulation encapsulating the plurality of LED light sources and at least a part of one side of the flexible substrate,
wherein at least two LED filaments of said plurality of LED filaments comprises at least one knot in the form of intentional complication in cordage of the at least two LED filaments,
wherein the intentional complication in cordage is a fastening made by looping the at least two LED filaments together and tightening it, and
wherein at least two of the plurality of LED filaments are connected to one another or tied together by the at least one knot.