Steering wheel heater device
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United States of America Patent
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Oct 22, 2019
Grant Date -
Apr 14, 2016
app pub date -
Dec 4, 2014
filing date -
Dec 12, 2013
priority date (Note) -
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Abstract
A steering wheel heater device including: a steering wheel heater configured of an electrical resistor which produces heat by electrical energy; an inductor; at least one switch; and a sensor circuit, wherein the inductor is connected in series to a first terminal of the steering wheel heater, the at least one switch turns on and off the supply of power to the steering wheel heater, the sensor circuit is electrically connected to the first terminal and determines whether a detected subject is in contact with a steering wheel based on a magnitude of capacitance of the steering wheel heater, and the at least one switch is at least one of a switch connected in series to the first terminal of the steering wheel heater via the inductor and a switch connected in series to a second terminal of the steering wheel heater.
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