# US 2018/0022269 A1 · Lighting apparatus for vehicles

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- Number: US 2018/0022269 A1
- Document ID: US20180022269A1
- Status: Published application
- Kind: A1
- Application number: 15/549,781
- Filed: 2016-02-09
- Published: 2018-01-25
- Earliest claimed: 2015-02-17
- Assignees: Hella GmbH & Co. KGaA
- Applicants: Hella KGaA Hueck & Co.
- Inventors: Martin Mügge; Thomas Rettweiler
- Web page: https://patentgrep.com/patent/US20180022269A1

## CPC

- B60Q 1/2607: {comprising at least two indicating lamps}
- B60Q 1/0041: {of several lamps in relation to each other}
- B60Q 1/2696: {Mounting of devices using LEDs}
- B60Q 1/34: for indicating change of drive direction (B60Q1/22 takes precedence)
- B60Q 1/381: {with several light sources activated in sequence, e.g. to create a sweep effect}
- B60Q 1/44: for indicating braking action {or preparation for braking, e.g. by detection of the foot approaching the brake pedal}
- F21S 43/13: characterised by the type of light source
- F21S 43/14: Light emitting diodes [LED]
- F21S 43/20: characterised by refractors, transparent cover plates, light guides or filters
- F21S 43/237: rod-shaped
- F21S 43/243: emitting light from one or more of its extremities
- F21S 43/247: with a single light source being coupled into the light guide
- F21S 43/26: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255}
- F21S 43/28135: {Structures encapsulating the light source}
- F21S 43/2815: {Mechanical properties, e.g. flexibility}
- F21S 43/2817: {Coatings, e.g. anti-reflection coatings}
- B60Q 2400/30: Daytime running lights [DRL], e.g. circuits or arrangements therefor
- B60Q 2400/50: Projected symbol or information, e.g. onto the road or car body
- F21Y 2115/10: Light-emitting diodes [LED]
- G03H 1/0248: {Volume holograms}
- G03H 1/2202: {Reconstruction geometries or arrangements}
- B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- G03H: HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; {stereo-photographic or similar processes G03C9/00}; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; {stereoscopic or other three dimensional effects in television systems H04N13/00})

## Abstract

A lighting apparatus for vehicles with a light source unit and optical equipment for generating a specified signal light distribution to provide a specified signal function. The optical equipment consists of at least two optical units. A first optical unit deflects a first light beam emitted by the first light source is designed to generate the specified signal light distribution. A second optical unit, a hologram element, is used to deflect a second light beam generated by the second light source to create a holographic light image so that the specified signal function consists of the signal light distribution and the holographic light image that is spaced at a distance.

## Claims

### Claim 1

A lighting apparatus for vehicles, the light source comprising:
a light source unit including at least a first and a second light source; and
optical equipment for generating a specified signal light distribution to provide a specified signal function, said the optical equipment including: at least two optical units, where:
a first optical unit for deflecting a first light beam emitted by the first light source generates a specified signal light distribution and
a second optical unit, which includes a hologram element, deflects a second light beam generated by the second light source to create a holographic light image;
wherein the specified signal function consists of the signal light distribution and the holographic light image spaced at a distance therefrom.

### Claim 2 (depends on 1)

The lighting apparatus in accordance with claim 1, wherein the light source unit consists of the first light source from the first optical unit and the second light source from the second optical unit, so that a signal light unit consisting of the first light source and the first optical unit is designed to generate the signal light distribution and a hologram lighting unit consisting of the second light source and the second optical unit is designed to generate the holographic light image.

### Claim 3 (depends on 1)

The lighting apparatus in accordance with claim 1, wherein the hologram element features a structure in which the holographic light image is arranged in the vicinity of a cover lens that is enclosed in a housing for the lighting apparatus.

### Claim 4 (depends on 3)

The lighting apparatus in accordance with claim 3, wherein the holographic light image is located within the housing and/or the area of entry for the cover lens and/or outside the housing.

### Claim 5 (depends on 3)

The lighting apparatus in accordance with claim 3, wherein the hologram element is attached to the inside of the cover lens or to a support disc on the inside of the housing.

### Claim 6 (depends on 1)

The lighting apparatus in accordance with claim 1, wherein the hologram element is designed as a volume hologram element, a surface hologram element or a diffractive lens that is used to bend the second light beam within an angle and/or spectral range defined for this beam.

### Claim 7 (depends on 3)

The lighting apparatus in accordance with claim 3, wherein the hologram element is designed as a reflection hologram element and is located in a lower section of the housing so that the hologram element can emit the second light beam up through the cover lens at a steep angle of radiation (Φ), where the holographic light image is located in a lower section of the housing.

### Claim 8 (depends on 3)

The lighting apparatus in accordance with claim 3, wherein the holographic light image runs mostly perpendicular to the cover lens and/or horizontally.

### Claim 9 (depends on 1)

The lighting apparatus in accordance with claim 1, wherein the hologram element is segmented, where hologram segments of the hologram element can be activated individually and/or sequentially using multiple light sources.

### Claim 10 (depends on 1)

The lighting apparatus in accordance with claim 1, wherein the hologram element is designed such that the holographic light image features light strips, light areas or three-dimensional images.