# US 10,766,404 B2 · Lighting device for vehicles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,766,404 B2 - Document ID: US10766404B2 - Status: Granted - Kind: B2 - Application number: 16/008,762 - Filed: 2018-06-14 - Published: 2018-10-11 - Granted: 2020-09-08 - Earliest claimed: 2015-12-14 - Assignees: Hella GmbH & Co. KGaA - Applicants: HELLA GmbH & Co. KGaA - Inventors: Martin Muegge - Web page: https://patentgrep.com/patent/US10766404B2 ## CPC - B60Q 1/2607: {comprising at least two indicating lamps} - F21S 43/13: characterised by the type of light source - F21S 43/14: Light emitting diodes [LED] - F21S 43/26: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255} - F21S 43/31: Optical layout thereof - F21S 43/40: characterised by the combination of reflectors and refractors - G02B 5/32: Holograms used as optical elements - G03H 1/2286: {Particular reconstruction light (G03H1/24 takes precedence); Beam properties} - G03H 1/2202: {Reconstruction geometries or arrangements} - G03H 2001/2231: {Reflection reconstruction} - G03H 2001/2234: {Transmission reconstruction} - G03H 2222/34: Multiple light sources - G03H 2227/06: Support including light source - 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 - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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 device for vehicles having a housing in which is arranged a hologram light fixture that has a light source unit and has an optical unit with a hologram element for generating a predetermined lighting function. An auxiliary element is associated with the light source unit, by means of which light that is emitted by the light source unit can be deflected in the direction of the hologram element. In this design, the light source unit and/or the auxiliary element is arranged in the region of a side of the hologram element or in the region of a lateral extension of an edge of the hologram element extending in the direction of a central axis of the hologram element. ## Claims ### Claim 1 A lighting device for a vehicle, the lighting device comprising: a housing; a hologram light fixture arranged in the housing, the hologram light fixture having a light source unit and an optical unit with a hologram element for generating a predetermined lighting function; and an auxiliary element associated with the light source unit, wherein via the auxiliary element, light that is emitted by the light source unit is adapted to be deflected and oriented in a direction of the hologram element to generate a virtual light source and to reconstruct a hologram, wherein the light source unit and/or the auxiliary element is arranged in a region of a side of the hologram element or in a region of a lateral extension of an edge of the hologram element extending in a direction of a central axis of the hologram element, and wherein with respect to a lateral direction that runs parallel to a primary direction of emission of the hologram element, the auxiliary element is arranged to be offset from the light source unit such that, in the lateral direction, a distance between the hologram element and the light source unit is smaller than a distance between the hologram element and the auxiliary element. ### Claim 2 (depends on 1) The lighting device according to claim 1, wherein a depth extent between the hologram element and the auxiliary element, that extends in the primary direction of emission of the hologram element, is smaller than a height extent extending transversely to the primary direction of emission that runs between the light source unit and the auxiliary element or between the light source unit or the auxiliary element and an edge of the hologram element arranged on a side facing away from the light source unit or the auxiliary element. ### Claim 3 (depends on 2) The lighting device according to claim 2, wherein the depth extent is in a range from 30 mm to 100 mm, and the height extent is in a range from 50 mm to 120 mm. ### Claim 4 (depends on 1) The lighting device according to claim 1, wherein the auxiliary element is arranged in the region of a first edge of the hologram element, and wherein the light source unit is arranged in the region of an opposite, second edge of the hologram element. ### Claim 5 (depends on 1) The lighting device according to claim 1, wherein the light source unit includes a first light source unit and a second light source unit and the auxiliary element includes a first auxiliary element and a second auxiliary element, and wherein the hologram element has at least two different optical structures so that a first optical structure serves in interaction with the first light source unit and with the first auxiliary element for the generation of a first lighting function, and a second optical structure serves in interaction with the second light source unit and with the second auxiliary element for the generation of a second lighting function. ### Claim 6 (depends on 1) The lighting device according to claim 1, wherein the hologram element has a center axis that extends in the primary direction of emission of the hologram element, and wherein the light source unit and the auxiliary element are both arranged in a region provided on a same side of the hologram element with respect to the center axis. ### Claim 7 (depends on 6) The lighting device according to claim 6, wherein the light source unit is arranged such that light emitted therefrom is emitted in an opposite direction as the primary direction of emission of the hologram element. ### Claim 8 (depends on 1) The lighting device according to claim 1, wherein the hologram element is implemented as a transmission hologram element, wherein at least the light source unit or the auxiliary element is arranged behind the transmission hologram element in the primary direction of emission of the hologram element or wherein the hologram element is implemented as a reflection hologram element, and wherein at least the light source unit or the auxiliary element is arranged in front of the reflection hologram element in the primary direction of emission. ### Claim 9 (depends on 6) The lighting device according to claim 6, wherein at least two of the auxiliary element are provided between the light source unit and the hologram element. ### Claim 10 (depends on 1) The lighting device according to claim 1, wherein the light source unit has at least two light sources, LED light sources, or laser diodes, wherein arranged immediately in front of the light source unit is a lens optical unit that has a number of lens segments matching the number of light sources, and wherein the lens segments are each associated with one light source of the light source unit. ### Claim 11 A lighting device for a vehicle, the lighting device comprising: a housing; a hologram light fixture arranged in the housing, the hologram light fixture having a light source unit and an optical unit with a hologram element for generating a predetermined lighting function; and an auxiliary element associated with the light source unit, wherein via the auxiliary element, light that is emitted by the light source unit is adapted to be deflected and oriented in a direction of the hologram element to generate a virtual light source and to reconstruct a hologram, wherein the light source unit and/or the auxiliary element is arranged in a region of a side of the hologram element or in a region of a lateral extension of an edge of the hologram element extending in a direction of a central axis of the hologram element, wherein the light source unit includes a first light source unit and a second light source unit and the auxiliary element includes a first auxiliary element and a second auxiliary element, and wherein the hologram element has at least two different optical structures so that a first optical structure serves in interaction with the first light source unit and with the first auxiliary element for the generation of a first lighting function, and a second optical structure serves in interaction with the second light source unit and with the second auxiliary element for the generation of a second lighting function, and wherein the first light source unit and the second light source unit and the first auxiliary element and the second auxiliary element, are in each case arranged in the region of opposite sides of the same hologram element.