Headlamp for vehicles
AssigneeHella GmbH & Co. KGaA
InventorsLukas Hiller, Martin Mügge
Life of this patent
Estimating the term…
Abstract
A headlamp for vehicles is provided with a light source unit containing numerous light sources, and with a hologram unit containing numerous hologram segments for generating a predefined light distribution. Each of the hologram segments has at least one dedicated light source. The hologram segments are reflection hologram segments behind the respective dedicated light sources in the direction light is emitted by the headlamp, which light from the light sources strikes them at an acute angle and is reflected in the light emission direction in accordance with the holographic diffraction information stored in the respective reflection hologram segments.
Claims11
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.
Dependencies are inferred from the claim text.