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US 12,007,086 B2Granted
Polarity correcting circuit for light-emitting diode (LED) retrofit headlight
AssigneeLumileds LLC
InventorGennadi Tochadse
Life of this patent
Estimating the term…
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.
Claims17
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.
3 more elements
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.
2 more elements
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.
5 more elements
Dependencies are inferred from the claim text.