# US 2021/0278056 A1 · Light device of 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 2021/0278056 A1 - Document ID: US20210278056A1 - Status: Published application - Kind: A1 - Application number: 17/191,982 - Filed: 2021-03-04 - Published: 2021-09-09 - Earliest claimed: 2020-03-09 - Assignees: Varroc Lighting Systems, S.R.O. - Applicants: Varroc Lighting Systems, s.r.o. - Inventors: Tomas GLOSS; Jiri KOCHANEK; Ludek MAZAL - Web page: https://patentgrep.com/patent/US20210278056A1 ## CPC - F21S 41/40: characterised by screens, non-reflecting members, light-shielding members or fixed shades - F21S 43/14: Light emitting diodes [LED] - B60R 13/005: {Manufacturers' emblems, name plates, bonnet ornaments, mascots or the like; Mounting means therefor} - F21S 41/2805: {Cover glass} - F21S 41/285: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805} - F21S 43/241: of complex shape - F21S 43/245: emitting light from one or more of its major surfaces - F21S 43/246: {having two or more output branches} - F21S 43/249: with two or more light sources being coupled into the light guide - F21S 43/2492: {having two or more input branches} - F21S 43/252: {Two or more successive light guides} - F21S 43/26: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255} - F21S 43/2605: {Refractors} - F21S 43/281: {Materials thereof; Structures thereof; Properties thereof; Coatings thereof} - F21S 43/31: Optical layout thereof - F21S 43/40: characterised by the combination of reflectors and refractors - F21S 43/601: {characterised by variable optical properties, e.g. involving the use of LCD or movable parts} - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR ## Abstract The light device of a motor vehicle comprises a light unit (4) and a cover (2). The light unit (4) comprises a light guide (7) with a front surface (8) for the exit of light rays (10) from the light guide (7) situated opposite the cover (2), a rear surface (9) comprising unbinding elements (73) configured to reflect light rays (10) towards the front surface (8), and at least one binding surface (71) to bind light rays (10) emitted by the light source (6) associated with the binding surface (71) to the light guide (7). The light device further comprises a carrier (5) situated opposite the rear surface (9) of the light guide (7) and configured to reflect light rays (10) that have escaped from the light guide (7) through the rear surface (9) back to the light guide (7). The cover (2) comprises at least one impermeable region (22) preventing light rays (10) from passing out of the cover (2), and at least one permeable region (21) to allow light rays (10) to pass through the cover (2). ## Claims ### Claim 1 A light device of a motor vehicle comprising a light unit and a cover that separates the light unit from the external environment of the light device, wherein the light unit comprises a light guide with a front surface intended for the exit of light rays from the light guide and situated opposite the cover, a rear surface comprising unbinding elements configured to reflect light rays towards the front surface, and at least one binding surface to bind light rays emitted by the light source associated with the binding surface to the light guide, wherein the light device further comprises a carrier situated opposite the rear surface of the light guide and configured to reflect light rays that have escaped from the light guide through the rear surface back to the light guide, wherein the cover comprises at least one impermeable region preventing light rays from passing out of the cover, and at least one permeable region allowing light rays to pass through the cover out of the light device. ### Claim 2 (depends on 1) The light device according to claim 1, wherein at least one of the impermeable regions is made in the form of a layer situated anywhere within the thickness of the cover and/or in such a way that it forms a part of the cover surface. ### Claim 3 (depends on 1) The light device according to claim 1, wherein at least one of the impermeable regions is constituted by a paint or metal coat. ### Claim 4 (depends on 1) The light device according to claim 1, wherein at least one of the impermeable regions has reflective properties enabling reflection of light rays that have left the light guide from the impermeable region back to the light guide. ### Claim 5 (depends on 1) The light device according to claim 1, wherein the surfaces of the impermeable regions are parallel to the cover surface in their location. ### Claim 6 (depends on 1) The light device according to claim 1, wherein the permeable and impermeable regions are configured to produce the required shape of an inscription or logo with the light sources on. ### Claim 7 (depends on 1) The light device according to claim 1, wherein permeable and impermeable regions are configured to produce the required shape of an inscription or logo with the light sources off. ### Claim 8 (depends on 1) The light device according to claim 1, wherein the permeable and impermeable regions have mutually different colours. ### Claim 9 (depends on 1) The light device according to claim 1, wherein the permeable region is fitted with semi-permeable metal plating, partly permeable paint or another treatment to partly reduce passing of light rays. ### Claim 10 (depends on 1) The light device according to claim 1, wherein the carrier is equipped with at least one reflective region situated opposite the rear surface of the light guide to reflect light rays that have escaped from the light guide through its rear surface back to the light guide. ### Claim 11 (depends on 10) The light device according to claim 10, wherein the reflective region is situated opposite an overwhelming majority of the rear surface of the light guide, or opposite the whole rear surface of the light guide. ### Claim 12 (depends on 10) The light device according to claim 10, wherein the reflective region or regions are situated on one plane or on one convex or concave surface. ### Claim 13 (depends on 10) The light device according to claim 10, wherein the reflective region is adapted for diffusion of light rays. ### Claim 14 (depends on 1) The light device according to claim 1, wherein the location and design of the unbinding elements is adapted to direct most light rays that fall onto the unbinding elements towards the permeable regions of the cover. ### Claim 15 (depends on 1) The light device according to claim 1, wherein front surface is fitted with deflecting optical elements configured for defined deflection of light rays back to the light guide. ### Claim 16 (depends on 15) The light guide according to claim 15, wherein the deflecting optical elements are coloured coats, metal plating or an optical structure calculated for defined deflection of light rays. ### Claim 17 (depends on 15) The light device according to claim 15, wherein the deflecting optical elements are situated approximately in alignment behind the impermeable regions. ### Claim 18 (depends on 1) A light device according to claim 1, wherein at least one of the permeable regions is conceived as a light filter designed to homogenize or change the colour of the resulting light beam of light rays. ### Claim 19 (depends on 1) The light device according to claim 1, wherein the light guide has the shape of a plate with a curvature of the front surface corresponding to the curvature of the cover.