US 12,013,108 B2
Lighting device comprising a light-transmissive enclosure
Johannes Petrus Maria Ansems, Eindhoven (NL); Stephan Certain, Eindhoven (NL); Michel Cornelis Josephus Maria Vissenberg, Eindhoven (NL); Olexandr Valentynovych Vdovin, Eindhoven (NL); and Joris Jan Vrehen, Eindhoven (NL)
Assigned to SIGNIFY HOLDING, B.V., Eindhoven (NL)
Appl. No. 18/024,632
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Sep. 16, 2021, PCT No. PCT/EP2021/075439
§ 371(c)(1), (2) Date Mar. 3, 2023,
PCT Pub. No. WO2022/063671, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 20198022 (EP), filed on Sep. 24, 2020; application No. 20199600 (EP), filed on Oct. 1, 2020; and application No. 21160614 (EP), filed on Mar. 4, 2021.
Prior Publication US 2023/0324027 A1, Oct. 12, 2023
Int. Cl. F21V 3/02 (2006.01); F21V 3/10 (2018.01); F21W 131/103 (2006.01)
CPC F21V 3/02 (2013.01) [F21V 3/10 (2018.02); F21W 2131/103 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A lighting device comprising a light-transmissive enclosure and a light source,
wherein the light-transmissive enclosure has an outer surface and an inner surface opposite to the outer surface, the inner surface at least in part forming a cavity,
wherein the light-transmissive enclosure has an opening lying in a transverse plane (P1),
wherein the light source is arranged on the transverse plane (P1), or on a side of the transverse plane (P1) opposite of the light-transmissive enclosure, and configured to emit light into the cavity,
wherein the light-transmissive enclosure is arranged around a longitudinal axis (L), the longitudinal axis (L) lying in a longitudinal plane (P2) that is perpendicular to the transverse plane (P1),
wherein the light-transmissive enclosure has a first part and a second part separated from each other by the longitudinal plane (P2),
wherein the first part is shaped as a first parabolic segment having a first focal point that is located on the transverse plane (P1) and between the second part and the longitudinal plane (P2),
wherein the second part is shaped as a second parabolic segment having a second focal point that is located on the transverse plane (P1) and between the first part and the longitudinal plane (P2),
wherein the light source is arranged between the first focal point and the second focal point, and
wherein at least one of the outer surface and the inner surface of the light-transmissive enclosure has shapes in the form of a parabolic segment rotated around the longitudinal axis (L).