# US 12,225,662 B2 · Motor vehicle lighting module comprising a ceramic substrate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,662 B2 - Document ID: US12225662B2 - Status: Granted - Kind: B2 - Application number: 18/246,953 - Filed: 2021-09-30 - Published: 2023-11-09 - Granted: 2025-02-11 - Earliest claimed: 2020-09-30 - Assignees: Valeo Vision - Applicants: Valeo Vision - Inventors: Alexandre Val; Samuel Daroussin; Zdravko Zojceski; Antoine De Lamberterie - Web page: https://patentgrep.com/patent/US12225662B2 ## CPC - H05K 1/0306: {Inorganic insulating substrates, e.g. ceramic, glass} - F21S 43/14: Light emitting diodes [LED] - F21S 45/47: Passive cooling, e.g. using fins, thermal conductive elements or openings - F21V 19/001: {the light sources being semiconductors devices, e.g. LEDs} - F21V 23/06: the elements being coupling devices {, e.g. connectors} - H05K 1/0206: {by printed thermal vias} - H05K 1/147: {at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit (H05K1/148 takes precedence)} - H05K 3/3415: {on both sides of the substrate or combined with lead-in-hole components} - H05K 2201/066: Heatsink mounted on the surface of the printed circuit board [PCB] - H05K 2201/09018: Rigid curved substrate - H05K 2201/10106: Light emitting diode [LED] - H05K 2201/10128: Display - H05K 2201/10545: Related components mounted on both sides of the PCB - H05K 2203/1572: Processing both sides of a PCB by the same process; Providing a similar arrangement of components on both sides; Making interlayer connections from two sides - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - 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 A lighting module of a motor vehicle signaling device includes a ceramic substrate having opposite first and second faces, and a plurality of selectively activatable light sources mounted on the first face of the ceramic substrate. Each of the first and second faces of the ceramic substrate are provided with at least a first and a second respective interconnection layer. The ceramic substrate comprises a plurality of through holes designed to interconnect the first interconnection layer to the second interconnection layer. ## Claims ### Claim 1 A lighting module of a motor vehicle signaling device, comprising a convex ceramic substrate comprising opposing first and second faces, and a plurality of light sources that can be activated selectively, mounted on the first face of the ceramic substrate, each of the first and second faces of the ceramic substrate being provided with at least one first interconnection layer and at least one second interconnection layer, respectively, wherein the ceramic substrate comprises a plurality of through-holes arranged to interconnect the first interconnection layer and the second interconnection layer, the whole ceramic substrate has only one curvature, and the ceramic substrate has a thickness of between 100 μm and 200 μm and the curvature with a radius of curvature of between 90 mm and 500 mm. ### Claim 2 (depends on 1) The lighting module as claimed in claim 1, wherein the ceramic substrate is a glass substrate. ### Claim 3 (depends on 2) The lighting module as claimed in claim 2, wherein each light source is mounted on said first face of the ceramic substrate level with a through-hole. ### Claim 4 (depends on 1) The lighting module as claimed in claim 1, wherein each light source is mounted on said first face of the ceramic substrate level with a through-hole. ### Claim 5 (depends on 1) The lighting module as claimed in claim 1, the module comprising a connector capable of receiving an instruction for controlling said light sources and a control unit arranged to selectively control each of the light sources on the basis of said control instruction received by the connector. ### Claim 6 (depends on 5) The lighting module as claimed in claim 5, wherein the connector comprises an adhesive anisotropic conductive film, the connector being mechanically and electrically connected to one of the first and second interconnection layers by means of said adhesive anisotropic conductive film. ### Claim 7 (depends on 6) The lighting module as claimed in claim 6, wherein the connector comprises a flexible printed circuit board, the control unit being mounted on said flexible printed circuit board. ### Claim 8 (depends on 6) The lighting module as claimed in claim 6, wherein the connector is mounted on the second face of the ceramic substrate. ### Claim 9 (depends on 6) The lighting module as claimed in claim 6, further comprising a plurality of active control elements, each active control element being arranged to control one of the light sources with which it is associated and being mounted on a first interconnection layer level with one of the through-holes so as to be connected to the second interconnection layer, said plurality of active control elements forming an active matrix and the control unit being arranged to control said active matrix on the basis of said control instruction received by the connector. ### Claim 10 (depends on 5) The lighting module as claimed in claim 5, wherein the connector is mounted on the second face of the ceramic substrate. ### Claim 11 (depends on 5) The lighting module as claimed in claim 5, further comprising a plurality of active control elements, each active control element being arranged to control one of the light sources with which it is associated and being mounted on a first interconnection layer level with one of the through-holes so as to be connected to the second interconnection layer, said plurality of active control elements forming an active matrix and the control unit being arranged to control said active matrix on the basis of said control instruction received by the connector. ### Claim 12 (depends on 5) The lighting module as claimed in claim 5, wherein each light source is mounted directly on the first interconnection layer, the plurality of light sources forming a passive matrix and the control unit being arranged to control said passive matrix on the basis of the control instruction received by the connector. ### Claim 13 (depends on 12) The lighting module as claimed in claim 12, further comprising a support member on which the ceramic substrate is mounted. ### Claim 14 (depends on 1) The lighting module as claimed in claim 1, further comprising an opaque coating applied to the first face of the ceramic substrate. ### Claim 15 A lighting module of a motor vehicle signaling device, comprising: a ceramic substrate having opposing first and second faces, each of the first and second faces of the ceramic substrate being provided with at least one first interconnection layer and at least one second interconnection layer, respectively, wherein the ceramic substrate comprises a plurality of through-holes arranged to interconnect the first interconnection layer and the second interconnection layer; a plurality of light sources mounted on the first face of the ceramic substrate, the light sources configured to be activated selectively; a connector configured to receive an instruction for controlling the light sources; a plurality of control devices arranged to selectively control the light sources on the basis of the instruction received by the connector; and a support member on which the ceramic substrate is mounted, wherein the support member is provided with a plurality of recesses arranged to accommodate the control devices, or the support member is fixed to the ceramic substrate such that edges of the ceramic substrate are left free. ### Claim 16 (depends on 15) The lighting module of claim 15, wherein the support member is provided with a plurality of at least one recess arranged to accommodate the at least one control unit. ### Claim 17 (depends on 15) The lighting module of claim 15, wherein the support member is fixed to the ceramic substrate such that edges of the ceramic substrate are left free. ### Claim 18 (depends on 15) The lighting module of claim 15, further comprising a thermal interface formed between the support member and the ceramic substrate. ### Claim 19 A lighting module of a motor vehicle signaling device, comprising: a ceramic substrate having opposing first and second faces, each of the first and second faces of the ceramic substrate being provided with at least one first interconnection layer and at least one second interconnection layer, respectively, wherein the ceramic substrate comprises a plurality of through-holes arranged to interconnect the first interconnection layer and the second interconnection layer; and a plurality of light sources mounted on the first face of the ceramic substrate, the light sources configured to be activated selectively, wherein each of the light source is mounted directly on the first interconnection layer, and the first interconnection layer comprises a plurality of connection sub-layers incorporating a plurality of integrated microcircuits, each of the light sources being connected, via the first interconnection layer, to one of the integrated microcircuits.