# US 12,007,086 B2 · Polarity correcting circuit for light-emitting diode (LED) retrofit headlight > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,007,086 B2 - Document ID: US12007086B2 - Status: Granted - Kind: B2 - Application number: 17/894,755 - Filed: 2022-08-24 - Published: 2023-03-02 - Granted: 2024-06-11 - Earliest claimed: 2021-08-24 - Assignees: Lumileds LLC - Applicants: Lumileds LLC - Inventors: Gennadi Tochadse - Web page: https://patentgrep.com/patent/US12007086B2 ## CPC - F21S 41/141: Light emitting diodes [LED] - F21S 41/148: the main emission direction of the LED being perpendicular to the optical axis - F21K 9/238: Arrangement or mounting of circuit elements integrated in the light source - F21S 41/192: {Details of lamp holders, terminals or connectors} - F21V 23/06: the elements being coupling devices {, e.g. connectors} - H05B 47/18: via data-bus transmission - F21Y 2115/10: Light-emitting diodes [LED] - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - 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 A light emitting diode (LED) lamp, vehicle headlight system and vehicle headlight that are adapted for use with an electrical system of a vehicle that was designed for a conventional lamp-based headlight. To adapt to the electrical system designed a conventional lamp-based headlight, a correcting circuit is utilized that allows for LEDs to be powered irrespective of a polarity of a power signal provided by the vehicle. ## Claims ### Claim 1 A light emitting diode (LED) lamp, the LED lamp comprising: a lamp body that includes a plurality of LEDs, the lamp body having a base; an LED driver that controls the plurality of LEDs and is integrated into the base; a power cord having a first end and a second end that are electrically coupled and separated by a length, wherein the first end electrically couples to the LED driver; a plug formed on and electrically coupled to the second end of the power cord, wherein the plug is electrically connectable to an electrical system of a vehicle and the length of the power cord spaces the plug away from the lamp body; and a correcting circuit, integrally formed in the plug, that receives a first power signal from the electrical system of the vehicle via the plug and converts the first power signal into a second power signal that is provided to the LED driver. ### Claim 2 (depends on 1) The LED lamp of claim 1, wherein the plug comprises pins that cool the correcting circuit via conduction. ### Claim 3 (depends on 1) The LED lamp of claim 1, wherein the first power signal and the second power signal have a different polarity. ### Claim 4 (depends on 1) The LED lamp of claim 1, wherein the correcting circuit includes a diode bridge. ### Claim 5 (depends on 1) The LED lamp of claim 1, wherein the correcting circuit includes an inverting buck-boost circuit. ### Claim 6 (depends on 1) The LED lamp of claim 1, wherein the plug is adapted to connect to a non-polarized socket. ### Claim 7 A vehicle headlight system, the vehicle headlight system comprising: an LED DC/DC module that provides drive current to a plurality of LEDs; a power cord having a first end and a second end that are electrically coupled and separated by a length, wherein the first end electrically couples to the LED DC/DC module; a plug formed on and electrically coupled to the second end of the power cord, wherein the plug is electrically connectable to an electrical system of a vehicle and the length of the power cord spaces the plug apart from the LED DC/DC module; and a correcting circuit, integrally formed in the plug, that receives a first power signal from the electrical system of the vehicle via the plug and converts the first power signal into a second power signal that is provided to the LED DC/DC module. ### Claim 8 (depends on 7) The vehicle headlight system of claim 7, wherein the plug comprises pins that cool the correcting circuit via conduction. ### Claim 9 (depends on 7) The vehicle headlight system of claim 7, wherein the first power signal and the second power signal have a different polarity. ### Claim 10 (depends on 7) The vehicle headlight system of claim 7, wherein the correcting circuit includes a diode bridge. ### Claim 11 (depends on 7) The vehicle headlight system of claim 7, wherein the correcting circuit includes an inverting buck-boost circuit. ### Claim 12 (depends on 7) The vehicle headlight system of claim 7, wherein the plug is adapted to connect to a non-polarized socket. ### Claim 13 A light emitting diode (LED) headlight, the LED headlight comprising: a lamp fixture that is adapted to integrate into an exterior of a vehicle; one or more optical components that are mechanically coupled to the lamp fixture and project light emitted a plurality of LEDs; a lamp body that includes the plurality of LEDs and mechanically couples to the headlight housing, the lamp body having a base; an LED driver that controls the plurality of LEDs and is integrated into the base; a power cord having a first end and a second end that are electrically coupled and separated by a length, wherein the first end electrically couples to the LED driver; a plug that is formed on and electrically coupled to the second end of the power cord, wherein the plug is electrically connectable to an electrical system of the vehicle and the length of the power cord spaces the plug away from the lamp body; and a correcting circuit, integrally formed in the plug, that receives a first power signal from the electrical system of the vehicle via the plug and converts the first power signal into a second power signal that is provided to the LED driver. ### Claim 14 (depends on 13) The LED headlight of claim 13, wherein the plug comprises pins that cool the correcting circuit via conduction. ### Claim 15 (depends on 13) The LED headlight of claim 13, wherein the first power signal and the second power signal have a different polarity. ### Claim 16 (depends on 13) The LED headlight of claim 13, wherein the correcting circuit includes a diode bridge. ### Claim 17 (depends on 13) The LED headlight of claim 13, wherein the plug is adapted to connect to a non-polarized socket.