US 11,841,115 B2
LED filament lighting device
Ties Van Bommel, Horst (NL); and Rifat Ata Mustafa Hikmet, Eindhoven (NL)
Assigned to SIGNIFY HOLDING B.V., Eindhoven (NL)
Appl. No. 17/762,758
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Sep. 28, 2020, PCT No. PCT/EP2020/077109
§ 371(c)(1), (2) Date Mar. 23, 2022,
PCT Pub. No. WO2021/063889, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 19201277 (EP), filed on Oct. 3, 2019.
Prior Publication US 2022/0341549 A1, Oct. 27, 2022
Int. Cl. F21K 9/232 (2016.01); F21V 3/04 (2018.01)
CPC F21K 9/232 (2016.08) [F21V 3/049 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An LED filament lighting device comprising,
at one or more LED filaments, each including a plurality of LEDs mounted on an elongated substrate and each having ending portions,
at one or more light scattering element, each including a light scattering shell surrounding a transparent volume,
each light scattering element being arranged to encompass at least one LED of at least one LED filament, and configured to scatter light emitted from the encompassed LED(s), thereby forming a first LED set including at least one LED encompassed by scattering element(s), and a second LED set including a plurality of LEDs not encompassed by scattering element(s),
wherein said one or more scattering elements encapsulates the ending portions of at least two of the LEDs filaments where the at least two LEDs filaments are connected,
or where the at least one scattering element is positioned at a bend of the one or more LED filaments, and
wherein a light distribution from said first LED set combines with a light distribution from said second LED set to provide a homogeneous total light distribution from said LED filament lighting device.