US 11,739,901 B2
Projection headlight for vehicles with light guides formed to image to different sub-light distributions
Bjoern Dressler, Menden (DE); Franz-Josef Kalze, Harsewinkel (DE); and Ronny Letzin, Lippstadt (DE)
Assigned to Hella GmbH & Co. KGaA, Lippstadt (DE)
Filed by Hella GmbH & Co. KGaA, Lippstadt (DE)
Filed on Jan. 12, 2022, as Appl. No. 17/574,317.
Application 17/574,317 is a continuation of application No. PCT/EP2020/068236, filed on Jun. 29, 2020.
Claims priority of application No. 10 2019 118 968.3 (DE), filed on Jul. 12, 2019.
Prior Publication US 2022/0136673 A1, May 5, 2022
Int. Cl. F21S 41/24 (2018.01); F21S 41/657 (2018.01); F21S 41/32 (2018.01); F21S 41/143 (2018.01); F21S 41/255 (2018.01); F21S 41/19 (2018.01); F21S 41/43 (2018.01); F21S 41/151 (2018.01)
CPC F21S 41/657 (2018.01) [F21S 41/143 (2018.01); F21S 41/151 (2018.01); F21S 41/19 (2018.01); F21S 41/24 (2018.01); F21S 41/255 (2018.01); F21S 41/322 (2018.01); F21S 41/43 (2018.01)] 12 Claims
OG exemplary drawing
 
1. A projection headlight for vehicles, the projection headlight comprising:
a first lighting unit comprising a light source and a primary optical unit for pre-shaping light exiting the light source;
a second lighting unit comprising a second light source and a primary optical unit for pre-shaping the light exiting the second light source;
a secondary optical unit for imaging the light exiting the primary optical unit of the first lighting unit in a region in front of the vehicle as a first light distribution and the light exiting the primary optical unit of the second lighting unit as a second light distribution;
an actuator for actuating the first lighting unit and the second lighting unit in order to generate the light distribution consisting of the first light distribution and the second light distribution;
a diaphragm with a diaphragm edge to produce a light-dark boundary in the first light distribution,
wherein the primary optical unit of the first lighting unit and/or the second lighting unit comprises a plurality of light guide elements which are designed to be formed differently such that the light exiting the light guide elements is imaged into different sub-light distributions of the first light distribution or the second light distribution by the secondary optical unit, the secondary optical unit being paired with the first lighting unit and the second lighting unit,
wherein each of the light guide elements of the primary optical unit of the first lighting unit has a light coupling surface on a side facing the light source and a light decoupling surface on a side facing away from the light source, wherein the light decoupling surface of each of the light guide elements is shaped such that the light decoupled from each of the light decoupling surfaces is decoupled in different directions, so that the light is imaged by the secondary optical unit to the different sub-light distributions of the first light distribution, and
wherein each of the light guide elements of the primary optical unit of the second lighting unit has a light coupling surface on a side facing the second light source and the primary optical unit of the second lighting unit has a light decoupling surface on a side facing away from the second light source, the light decoupling surface being formed by a front of the diaphragm facing the secondary optical unit, wherein the light decoupling surface is shaped such that the light that is pre-shaped from a light deflection surface of each of the light guide elements is decoupled in different directions, so that the light is imaged by the-secondary optical unit to the different sub-light distributions of the second light distribution, wherein the light deflection surface of each of the light guide elements face the secondary optical unit and are angled differently from one another.