US 11,982,417 B2
Automotive lighting and/or signaling device
Jean-Pascal Herlin, Turin (IT); Sara Paroni, Turin (IT); and Pierfrancesco Zilio, Turin (IT)
Assigned to AUTOMOTIVE LIGHTING ITALIA S.p.A., Turin (IT)
Filed by AUTOMOTIVE LIGHTING ITALIA S.p.A., Turin (IT)
Filed on May 8, 2019, as Appl. No. 16/406,166.
Claims priority of application No. 18425032 (EP), filed on May 8, 2018.
Prior Publication US 2019/0346106 A1, Nov. 14, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. F21S 41/24 (2018.01); F21S 41/141 (2018.01); F21S 43/14 (2018.01); F21S 43/241 (2018.01); F21S 43/245 (2018.01); F21S 43/249 (2018.01)
CPC F21S 41/24 (2018.01) [F21S 41/141 (2018.01); F21S 43/14 (2018.01); F21S 43/241 (2018.01); F21S 43/245 (2018.01); F21S 43/249 (2018.01)] 17 Claims
OG exemplary drawing
 
1. A lighting and/or signaling device, comprising:
a light guide which extends from a light inlet and diffusion wall adapted to receive and diffuse a light beam to a light outlet wall which creates a lighting portion of the lighting and/or signaling device,
at least one LED light source, adapted to emit the light beam along a main optical axis and facing a light emission portion of said light inlet and diffusion wall adapted to receive said light beam emitted by said LED light source,
wherein the inlet and diffusion wall and the light outlet wall are opposite to each other along the main optical axis,
the lighting portion comprising a middle lighting portion aligned with the LED light source and said light emission portion, and a peripheral lighting portion which surrounds said middle lighting portion,
the light guide being provided with extraction elements arranged on the light inlet and diffusion wall, said extraction elements including punctiform micro optics which diffuse the light towards the light outlet wall and/or towards the reflector element and a plurality of cylindrical optics disposed on the light outlet wall, at the middle lighting portion,
at least one reflector element that is separate from the light guide but associated with the light inlet and diffusion wall of the light guide and directly facing the respective extraction elements so as to reflect light towards the light outlet wall,
wherein a diffusion layer is arranged to cover the lighting portion on the side of the light outlet wall, and wherein said diffusion layer has a differentiated transmission factor according to the light intensity of the incident light rays on the lighting portion so as to obtain a uniform light intensity both on the middle lighting portion and on the peripheral lighting portion, and
wherein said plurality of cylindrical optics define cylindrical paths which are concentric to one another with respect to the main optical axis of the LED light source and which extract the incident light beams thereon, towards the diffusion layer.