# US 10,309,605 B2 · Illumination apparatus 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 10,309,605 B2 - Document ID: US10309605B2 - Status: Granted - Kind: B2 - Application number: 15/529,575 - Filed: 2015-11-12 - Published: 2017-11-02 - Granted: 2019-06-04 - Earliest claimed: 2014-11-26 - Assignees: ZKW Group GmbH - Applicants: ZKW Group GmbH - Inventors: Martin Schragl; Christian Bemmer - Web page: https://patentgrep.com/patent/US10309605B2 ## CPC - F21S 41/285: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805} - F21S 41/13: Ultraviolet light; Infrared light - F21S 41/16: Laser light sources - F21S 41/176: Light sources where the light is generated by photoluminescent material spaced from a primary light generating element - F21S 41/37: characterised by their material, surface treatment or coatings - F21S 41/40: characterised by screens, non-reflecting members, light-shielding members or fixed shades - F21S 45/70: Prevention of harmful light leakage - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS ## Abstract The invention relates to an illumination apparatus (100), especially for a motor vehicle, comprising at least one laser light source (10); a wavelength conversion element (20) that is designed to receive excitation light from the at least one laser light source (10); and a reflector (30) having at least one reflector body (30′), which at least one reflector body (30′) comprises a reflecting surface (31), which reflecting surface (31) reflects the light emitted by the wave-length conversion element (20) in the visible wavelength range, wherein the reflector (30), at its reflector surface (30a) bearing the reflecting surface (31), is provided with the reflecting surface (31), wherein the reflector surface (30a) has at least one region (30a′, 30a″) that is free of the reflecting surface (31), and wherein the reflector surface (30a), at least in the region (30a′, 30a″) that is free of the reflecting surface (31), is embodied such that at least some of the excitation light incident in the region (30a′, 30a″) is absorbed. ## Claims ### Claim 1 An illumination apparatus (100) for a motor vehicle, the illumination apparatus comprising: at least one laser light source (10); a wavelength conversion element (20) configured to receive excitation light from the at least one laser light source (10); and a reflector (30) having at least one reflector body (30′), wherein the at least one reflector body (30′) comprises a reflecting surface (31), wherein the reflecting surface (31) is configured to reflect visible light emitted by the wavelength conversion element (20), and wherein the reflecting surface (31) is provided on a reflector surface (30a) of the at least one reflector body (30′), wherein the reflector surface (30a) has at least one region (30a′, 30a″) that is free of the reflecting surface (31), and wherein the at least one region (30a′, 30a″) that is free of the reflecting surface (31) is configured to absorb at least some of the excitation light incident in the at least one region (30a′, 30a″), wherein the at least one region (30a′, 30a″) is non-temperature resistant above a limit temperature, and wherein above the certain limit temperature the at least one absorbing region is destroyed and the excitation light travels into a rear portion of the illumination apparatus. ### Claim 2 (depends on 1) The illumination apparatus of claim 1, wherein the reflector surface (30a) is coated with a reflecting material that forms the reflecting surface (31). ### Claim 3 (depends on 2) The illumination apparatus of claim 2, wherein in the at least one region (30a′) that is free of the reflecting surface (31), the reflector surface (30a) is not coated with the reflecting material or, after coating, the reflecting material is removed in the at least one region (30a′) so that at least some incident excitation light is absorbed by the reflector surface. ### Claim 4 (depends on 1) The illumination apparatus of claim 1, wherein the at least one reflector body (30′) has at least one through-hole (32), and wherein the at least one through-hole (32) is closed with a closure element (33), wherein a surface (33′) of the closure element (33) that is disposed on a side of the reflecting surface (31) forms the at least one region (30a″) that absorbs at least some of the excitation light. ### Claim 5 (depends on 4) The illumination apparatus of claim 4, wherein the surface (33′) of the closure element (33) closes the entire at least one through-hole (32). ### Claim 6 (depends on 4) The illumination apparatus of claim 4, wherein the closure element (33) is embodied and/or is inserted into the at least one through-hole (32) such that the surface (33′) transitions essentially continuously to the reflecting surface (31). ### Claim 7 (depends on 1) The illumination apparatus of claim 1, wherein the at least one region (30a′, 30a″) is embodied such that most or all of the excitation light is absorbed. ### Claim 8 (depends on 1) The illumination apparatus of claim 1, wherein the limit temperature is 120° C. ### Claim 9 (depends on 1) The illumination apparatus of claim 1, wherein the at least one region (30a′, 30a″) is arranged in or on the reflector surface (30a) such that excitation light from the laser light (10) source directly incident on the reflector surface and/or excitation light that is emitted by the conversion element (20) is incident on the at least one region (30a, 30a″). ### Claim 10 (depends on 9) The illumination apparatus of claim 9, wherein the at least one region (30a′, 30a″) is arranged with respect to its surface extension, such that all of the excitation light directly from the laser light source (10) and incident on the reflector surface and/or all of the excitation light that is emitted by the conversion element (20) is incident on the at least one region (30a′, 30a″). ### Claim 11 (depends on 10) The illumination apparatus of claim 10, wherein the at least one region (30a′, 30a″) is arranged with respect to its surface extension, such that all of the excitation light incident on the reflector surface directly from the laser light source (10) and/or all of the excitation light that is emitted by the conversion element (20) is incident exactly and only on the at least one region (30a′, 30a″). ### Claim 12 (depends on 1) A motor vehicle headlight having at least one illumination apparatus according to claim 1. ### Claim 13 (depends on 1) A motor vehicle having at least one illumination apparatus according to claim 1. ### Claim 14 An illumination apparatus (100) for a motor vehicle, the illumination apparatus comprising: at least one laser light source (10); a wavelength conversion element (20) configured to receive excitation light from the at least one laser light source (10); and a reflector (30) having at least one reflector body (30′), wherein the at least one reflector body (30′) comprises a reflecting surface (31), wherein the reflecting surface (31) is configured to reflect visible light emitted by the wavelength conversion element (20), and wherein the reflecting surface (31) is provided on a reflector surface (30a) of the at least one reflector body (30′), wherein the reflector surface (30a) has at least one region (30a′, 30a″) that is free of the reflecting surface (31), and wherein the at least one region (30a′, 30a″) that is free of the reflecting surface (31) is configured to absorb at least some of the excitation light incident in the at least one region (30a′, 30a″), wherein the at least one region (30a′, 30a″) is non-temperature resistant above 120° C., and wherein above 120° C., the at least one absorbing region is destroyed, thereby to permit the excitation light to travel into a rear portion of the illumination apparatus.