US 12,007,100 B2
Illumination device
Romain Hameau, Eindhoven (NL)
Assigned to SIGNIFY HOLDING, B.V., Eindhoven (NL)
Appl. No. 17/918,814
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Apr. 9, 2021, PCT No. PCT/EP2021/059327
§ 371(c)(1), (2) Date Oct. 13, 2022,
PCT Pub. No. WO2021/209343, PCT Pub. Date Oct. 21, 2021.
Claims priority of application No. 20169405 (EP), filed on Apr. 14, 2020.
Prior Publication US 2023/0143772 A1, May 11, 2023
Int. Cl. F21V 19/00 (2006.01); F21V 5/00 (2018.01); F21V 17/12 (2006.01); F21V 17/16 (2006.01); F21Y 105/10 (2016.01); F21Y 115/10 (2016.01)
CPC F21V 19/003 (2013.01) [F21V 5/007 (2013.01); F21V 17/12 (2013.01); F21V 17/164 (2013.01); F21Y 2105/10 (2016.08); F21Y 2115/10 (2016.08)] 16 Claims
OG exemplary drawing
 
1. An illumination device comprising an optical plate extending over a plurality of LEDs arranged on a PCB main surface of a PCB, in a mounted configuration said PCB and optical plate are mutually connected by a plurality of fasteners,
wherein each fastener extends through a respective, associated through hole in the optical plate in a direction transverse to said PCB main surface,
wherein said associated through hole has a wide portion extending over a depth D from a first main surface of the optical plate facing away from the PCB towards a second main surface of the optical plate facing towards the PCB, which through hole is narrowed to a neck portion at said depth D, and
wherein each fastener extends through said through hole with play S in a plane P parallel to said PCB main surface and rests on a respective, associated resilient washer seated in the wide portion of said associated through hole,
wherein the wide portion comprises a tapered portion which gradually, preferably continually, tapers along depth D, and
wherein the washer is a toothed washer, preferably with teeth extending outward.