US 12,259,103 B2
Headlamp for vehicles
Lukas Hiller, Lippstadt (DE); and Martin Mügge, Geseke (DE)
Assigned to Hella GmbH & Co. KGaA, Lippstadt (DE)
Filed by Hella GmbH & Co. KGaA, Lippstadt (DE)
Filed on Jan. 11, 2024, as Appl. No. 18/410,622.
Application 18/410,622 is a continuation of application No. PCT/EP2022/069234, filed on Jul. 11, 2022.
Claims priority of application No. 102021117908.4 (DE), filed on Jul. 12, 2021.
Prior Publication US 2024/0142077 A1, May 2, 2024
Int. Cl. F21S 41/50 (2018.01); F21S 41/143 (2018.01); F21S 41/25 (2018.01); F21S 41/663 (2018.01); F21S 41/683 (2018.01); F21W 102/13 (2018.01); F21W 103/20 (2018.01)
CPC F21S 41/50 (2018.01) [F21S 41/143 (2018.01); F21S 41/25 (2018.01); F21S 41/663 (2018.01); F21S 41/683 (2018.01); F21W 2102/13 (2018.01); F21W 2103/20 (2018.01)] 11 Claims
OG exemplary drawing
 
1. A headlamp for vehicles, the headlamp comprising:
a light source unit containing one or more light sources; and
a hologram unit containing one or more hologram segments for generating a predefined light distribution, wherein each of the hologram segments has at least two dedicated light sources, the light sources oriented at different angles to the surface of the associated hologram segment,
wherein each hologram segment is a reflection hologram segment behind its respective dedicated light source in a direction light is emitted from the headlamp, which light from the light sources strikes the hologram segment at an acute angle and is reflected in the light emission direction in accordance with holographic diffraction information stored in the respective reflection hologram segments,
wherein the reflection hologram segments and the respective light sources dedicated thereto form a hologram module for generating a low beam light distribution and/or a high beam light distribution,
wherein different diffraction information for generating different light distributions is stored in each of the reflection hologram segments,
wherein the light sources for the hologram module are all on the same substrate, and
wherein:
a light source in the middle emits yellow light, such that light for generating a turn signal is reflected by the reflection hologram segment, and a light source on the left and a light source on the right emit white light, such that light for generating a low beam light distribution is reflected by the same reflection hologram segment, or
the light source in the middle emits white light, such that light for generating the low beam light distribution is reflected by the reflection hologram segment, and the light source on the left emits yellow light, such that light for generating a turn signal is reflected by the reflection hologram segment, and the light source on the right emits blue or green light, such that light for generating a welcome/farewell light function is reflected by the reflection hologram segment.