# US 10,480,742 B2 · Optical module 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 10,480,742 B2 - Document ID: US10480742B2 - Status: Granted - Kind: B2 - Application number: 15/720,034 - Filed: 2017-09-29 - Published: 2018-03-29 - Granted: 2019-11-19 - Earliest claimed: 2016-09-29 - Assignees: Valeo Vision - Applicants: Valeo Vision - Inventors: Alexandre Joerg; Marine Courcier - Web page: https://patentgrep.com/patent/US10480742B2 ## CPC - F21S 41/26: Elongated lenses - F21S 41/143: the main emission direction of the LED being parallel to the optical axis of the illuminating device - F21S 41/153: arranged in a matrix - F21S 41/19: Attachment of light sources or lamp holders (achieving variable light distribution by movable light sources F21S41/657) - F21S 41/24: Light guides - F21S 41/25: Projection lenses - F21S 41/29: Attachment thereof (for achieving variable light distribution F21S41/63) - F21S 45/47: Passive cooling, e.g. using fins, thermal conductive elements or openings - F21Y 2105/16: square or rectangular, e.g. for light panels - F21Y 2115/10: Light-emitting diodes [LED] - 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 ## Abstract An optical module for a motor vehicle, the module having a longitudinal optical axis including a matrix array of elementary light sources emitting from a common emission plane that is orthogonal to the optical axis, and a projecting lens for projecting the image of the elementary light sources. The projecting lens includes an object focal surface having a curvature defect. A field-correcting optical element is interposed between the emission plane and the projecting lens. ## Claims ### Claim 1 An optical module for a motor vehicle, said module having a longitudinal optical axis and comprising: a matrix array including two rows of elementary light sources each of which is configured to emit a primary elementary beam from a common emission plane that is orthogonal to the optical axis; a projecting lens that is arranged longitudinally at a distance in front of the matrix array of elementary light sources and that is configured to project the image of the elementary light sources, the projecting lens including an object focal surface having a curvature defect; and a field-correcting optical element interposed between the emission plane and the projecting lens, the field-correcting optical element compensating for the curvature defect in the object focal surface of the projecting lens, wherein the optical module includes a primary optical element including a plurality of light guides of longitudinal principal axes, each light guide of the plurality of light guides corresponding to a different one of the elementary light sources of the matrix array, each light guide including an entrance face through which light rays emitted by an associated primary light source of the matrix array enter and an exit front end face through which light rays exit, which face is arranged in the emission plane, each exit face forming a secondary elementary light source of said matrix array of elementary light sources, all of the light guides are produced in a primary optical element produced in a common block including a common exit front face for the light rays, and the entrance face of the field-correcting optical element is arranged longitudinally a distance away from the exit face of the primary optical element. ### Claim 2 (depends on 1) The module according to claim 1, wherein the field-correcting optical element includes an entrance face for light rays, which face is arranged longitudinally a distance away from the emission plane. ### Claim 3 (depends on 1) The module according to claim 1, wherein the primary light sources are arranged in a plane parallel to the emission plane, all the light guides having an identical longitudinal length. ### Claim 4 (depends on 1) The module according to claim 1, wherein the field-correcting optical element is formed by at least one field-correcting lens. ### Claim 5 (depends on 4) The module according to claim 4, wherein the field-correcting optical element is formed by a single field-correcting lens. ### Claim 6 (depends on 5) The module according to claim 5, wherein the entrance face of the field-correcting lens is concave at its center in proximity to the optical axis. ### Claim 7 (depends on 6) The module according to claim 6, wherein the entrance face of the field-correcting lens is convex on its periphery radially a distance away from the optical axis. ### Claim 8 (depends on 5) The module according to claim 5, wherein the field-correcting lens includes a convex exit face. ### Claim 9 (depends on 1) A motor-vehicle lighting device of a front headlamp type which comprises the module according to claim 1. ### Claim 10 (depends on 9) The lighting device according to claim 9, further comprising a low-beam module. ### Claim 11 (depends on 2) The module according to claim 2, wherein the field-correcting optical element is formed by at least one field-correcting lens. ### Claim 12 (depends on 6) The module according to claim 6, wherein the field-correcting lens includes a convex exit face. ### Claim 13 (depends on 2) A motor-vehicle lighting device of a front headlamp type which comprises the module according to claim 2. ### Claim 14 (depends on 1) The module according to claim 1, wherein the field-correcting optical element is a lens. ### Claim 15 (depends on 1) The module according to claim 1, wherein the field-correction element includes a plurality of field-flattener lenses. ### Claim 16 (depends on 1) The module according to claim 1, wherein the elementary light sources are light emitting diodes. ### Claim 17 (depends on 1) The module according to claim 1, further comprising a printed circuit board on which the elementary light sources are disposed. ### Claim 18 (depends on 17) The module according to claim 17, further comprising a heat sink attached to a side of the printed circuit board that is opposite a side on which the elementary light sources are disposed. ### Claim 19 (depends on 18) The module according to claim 18, wherein the heat sink includes a plurality of fins to remove heat generated by the elementary light sources. ### Claim 20 (depends on 1) The module according to claim 1, wherein the plurality of light guides are arranged in two rows corresponding to the two rows of light sources in the matrix array, and light guides of one of the two rows differ in shape from light guides of the other of the two rows.