US 12,018,811 B2
Lighting device for a motor vehicle
Christian Maier, Oberndorf an der Melk (AT); and Tuncay Firat, St. Pölten (AT)
Assigned to ZKW Group GmbH, Wieselburg (AT)
Appl. No. 17/921,435
Filed by ZKW Group GmbH, Wieselburg (AT)
PCT Filed Apr. 20, 2021, PCT No. PCT/EP2021/060168
§ 371(c)(1), (2) Date Oct. 26, 2022,
PCT Pub. No. WO2021/223999, PCT Pub. Date Nov. 11, 2021.
Claims priority of application No. 20172744 (EP), filed on May 4, 2020.
Prior Publication US 2023/0160555 A1, May 25, 2023
Int. Cl. F21S 43/20 (2018.01); F21S 41/24 (2018.01); F21S 43/237 (2018.01); F21S 43/251 (2018.01)
CPC F21S 43/26 (2018.01) [F21S 41/24 (2018.01); F21S 43/237 (2018.01); F21S 43/251 (2018.01)] 15 Claims
OG exemplary drawing
 
1. A lighting device (1) for a motor vehicle or for a motor vehicle headlamp system, the lighting device comprising:
a light source (2) for producing and emitting light;
a light conductor (3), wherein the light of the light source (2) is coupled into the light conductor (3) and decoupled on a decoupling surface of the light conductor (3), wherein the light conductor (3) comprises a first region (3a) and a curved region (3b) following the first region (3a), wherein the decoupling surface extends over the first region (3a) and the curved region (3b) and is formed in such a manner that the light rays, after the decoupling from the region (3a), are oriented parallel to one another;
a first optical element (4) having a light entry surface, which comprises a first portion (4a) and a second portion (4b) adjoining the first portion, wherein the first optical element (4) is arranged relative to the light conductor (3) in such a manner that light, which is decoupled from the first region (3a) of the light conductor (3), impinges on the first portion (4a) of the light entry surface of the first optical element (4), and light, which is decoupled from the curved region (3b) of the light conductor (3), impinges on a part region of the second portion (4b) of the light entry surface of the optical element (4),
wherein the lighting device (1) further comprises a second optical element (5), which is arranged between the curved region (3b) of the light conductor (3) and the second portion (4b) of the light entry surface of the first optical element (4) in such a manner and equipped in order to redirect light, which is decoupled from the curved region (3b) of the light conductor (3), in such a manner that the light, having passed through the second optical element (5), impinges on the entire second portion (4b) of the light entry surface of the first optical element (4),
wherein the lighting device is configured such that substantially all light emitted from the curved region of the light conductor is emitted directly onto the second optical element,
wherein the second optical element (4), on a surface (5a) facing the curved region (3b) of the light conductor (3), comprises entry optics which are equipped in order to redirect the light, which is decoupled from the curved region (3b) of the light conductor (3), in the direction of the second portion (4b) of the first optical element (4) upon entry into the second optical element (5), and
wherein the second optical element (5), on a surface (5b) facing the first optical element (4), comprises exit optics configured to redirect the light, upon exiting the second optical element (5), in such a manner that the light rays exiting from the second optical element (5), are oriented parallel to the light rays decoupled from the first portion (3a) of the light conductor (3).