# US 2026/0218874 A1 · Lighting device for a motor vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0218874 A1 - Document ID: US20260218874A1 - Status: Published application - Kind: A1 - Application number: 19/453,909 - Filed: 2026-01-20 - Published: 2026-07-30 - Earliest claimed: 2025-01-27 - Assignees: Hella GmbH & Co. KGaA - Applicants: Hella GmbH & Co. Kgaa - Inventors: Martin Mügge - Web page: https://patentgrep.com/patent/US20260218874A1 ## CPC - F21S 43/26241: {diffusing, scattering or spreading} - F21S 43/14: Light emitting diodes [LED] - F21S 43/15: Strips of light sources - F21S 43/237: rod-shaped - F21S 43/239: plate-shaped - F21S 43/245: emitting light from one or more of its major surfaces - F21S 43/249: with two or more light sources being coupled into the light guide - F21S 43/315: {using total internal reflection} - F21S 43/40: characterised by the combination of reflectors and refractors - F21V 5/005: {using microprisms} - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR ## Abstract Lighting device for a motor vehicle, comprising at least one light source, at least one optical disk with an entry surface and an exit surface opposite the entry surface for the light emitted by the light source during operation of the lighting device, and a device for backlighting the optical disk, which is arranged to cause the light emitted by the light source to impinge on the entry surface of the optical disk in such a way that the latter is at least partially illuminated, the optical disk having structures on its entry surface and/or on its exit surface which are arranged to cause a glitter effect and/or a crystal effect. ## Claims ### Claim 1 A lighting device for a motor vehicle, comprising at least one light source; at least one optical disk with an entry surface and an exit surface opposite the entry surface for light emitted by the at least one light source during operation of the lighting device; and a device for backlighting the at least one optical disk, which is designed to cause the light emitted by the at least one light source to impinge on the entry surface of the at least one optical disk in such a way that the at least one optical disk is at least partially illuminated; wherein the at least one optical disk has structures on at least one of the entry surface and the exit surface which are configured to cause at least one of a glitter effect and a crystal effect. ### Claim 2 (depends on 1) The lighting device according to claim 1, wherein the at least one optical disk has, on at least one of the entry surface and on the exit surface, scattering optics in the form of an optical grid, which is configured to scatter the light passing through the at least one optical disk uniformly. ### Claim 3 (depends on 2) The lighting device according to claim 2, wherein the optical grid has a plurality of identical surface elements which are arranged next to one another in two mutually different directions. ### Claim 4 (depends on 3) The lighting device according to claim 3, wherein at least one of the surface elements in each of the two directions is smaller than or equal to 0.5 mm in size. ### Claim 5 (depends on 3) The lighting device according to claim 3, wherein at least one of the surface elements in each of the two directions is smaller than or equal to 0.2 mm in size. ### Claim 6 (depends on 2) The lighting device according to claim 2, wherein the optical grid has a plurality of surface elements and wherein the structures are part of the optical grid, the shape of the structures being different from the shape of the surface elements. ### Claim 7 (depends on 6) The lighting device of claim 6, wherein the structures are each formed as a prismatic surface in order to deflect the light passing through the at least one optical disk. ### Claim 8 (depends on 2) The lighting device according to claim 2, wherein the optical grid has a plurality of surface elements, wherein the at least one optical disk has a plurality of microprisms on at least one of the entry surface and on the exit surface in addition to the optical grid, wherein the microprisms on at least some of the surface elements of the optical grid are different from the microprisms on at least some other of the surface elements of the optical grid. ### Claim 9 (depends on 8) The lighting device according to claim 8, wherein the microprisms each have a size of less than 0.5 mm. ### Claim 10 (depends on 8) The lighting device according to claim 8, wherein an additional optical scattering structure or diffuser structure is provided on the exit surface of the at least one optical disk. ### Claim 11 (depends on 2) The lighting device according to claim 2, wherein the optical grid has an irregular formation. ### Claim 12 (depends on 2) The lighting device according to claim 2, wherein the optical grid has a plurality of surface elements, wherein a normal of each of the plurality of surface elements is at least partially inclined relative to a direction in which the entry surface and the exit surface are opposite each other. ### Claim 13 (depends on 12) The lighting device according to claim 12, wherein the normals of at least some of the plurality of surface elements have a different inclination than the normals of at least some other of the surface elements. ### Claim 14 (depends on 2) The lighting device according to claim 2, wherein the optical grid has a plurality of surface elements, wherein at least some of the surface elements have one of a concave shape and a convex shape, and wherein edges of at least some of the surface elements protrude from the optical grid. ### Claim 15 (depends on 2) The lighting device according to claim 2, wherein the optical grid has a plurality of surface elements, wherein edges of at least some of the surface elements comprise micro-optics in order to enhance the crystal effect, wherein the micro-optics are at least one of prismatic and channel-shaped. ### Claim 16 (depends on 1) The lighting device according to claim 1, wherein the structures are spaced apart from one another. ### Claim 17 (depends on 16) The lighting device according to claim 16, wherein the at least one optical disk has, on at least one of the entry surface and on the exit surface, scattering optics in the form of an optical grid, which is configured to scatter the light passing through the at least one optical disk uniformly, wherein the optical grid has a plurality of surface elements, wherein the spacing between the structures serves to produce at least one of a glitter effect and a crystal effect that is greater than the size of the surface elements of the optical grid. ### Claim 18 (depends on 1) The lighting device according to claim 1, wherein the optical disk has a first optical grid on the entry surface and a second optical grid on the exit surface, the first and second optical grids configured to scatter the light passing through the optical disk, the first and second optical grids each having a plurality of surface elements, wherein the shape and/or the arrangement of the surface elements of the first optical grid is different from the shape and/or the arrangement of the surface elements of the second optical grid. ### Claim 19 (depends on 1) The lighting device according to claim 1, wherein the device for backlighting the at least one optical disk has a flat light guide for the light emitted by the at least one light source and at least one optical film for uniform illumination of the entry surface. ### Claim 20 (depends on 1) The lighting device according to claim 1, wherein the device for backlighting the at least one optical disk has at least one reflector for the light emitted by the at least one light source, wherein the lighting device is configured such that the light emitted by the at least one reflector illuminates the entry surface.