Lighting device for vehicles
AssigneeHella GmbH & Co. KGaA
InventorsLukas Hiller, Carsten Hohmann, Martin Mügge
Life of this patent
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Abstract
A lighting device for vehicles includes a light source unit containing numerous light sources, and includes a hologram unit containing numerous hologram segments for generating a predefined light distribution. The hologram segments form reflection hologram segments behind and/or next to the light source unit in the main beam direction (H) of the lighting device, such that light emitted from the light source strikes the reflection hologram segment at an acute angle φ). Holographic diffraction information is stored in the reflection hologram segments for generating a signal light distribution. The light source unit contains just one printed circuit board or one printed circuit board substrate.
Claims20
A lighting device for vehicles, the lighting device comprising:
- a light source unit comprising light sources positioned on a printed circuit board;
- and
- a hologram unit comprising hologram segments for generating a predefined light distribution,
- wherein the hologram segments are reflection hologram segments positioned behind and/or adjacent to the light source unit in a main beam direction (H) of the lighting device, such that light emitted from the light sources strikes the reflection hologram segments at an acute angle (φ),
- wherein holographic diffraction information for generating a signal light distribution is stored in the reflection hologram segments,
- wherein the light source unit comprises a single printed circuit board or a single printed circuit board substrate, and
- wherein the printed circuit board is between at least two of the reflection hologram segments, the printed circuit board having two sides, each side of the printed circuit board including at least one of the light sources positioned thereon.
A lighting device for vehicles, the lighting device comprising:
- a light source unit comprising light sources;
- a single printed circuit board substrate, each side of the printed circuit board substrate including at least one of the light sources;
- and
- a hologram unit comprising hologram segments for generating a predefined light distribution,
- wherein the hologram segments are reflection hologram segments positioned behind and/or adjacent to the light source unit in a main beam direction (H) of the lighting device, such that light emitted from the light sources strikes the reflection hologram segments at an acute angle (φ),
- wherein holographic diffraction information for generating a signal light distribution is stored in the reflection hologram segments,
- wherein the printed circuit board substrate is between at least two of the reflection hologram segments.
Dependencies are inferred from the claim text.