Headlamp leveling device and headlamp leveling method for vehicle
AssigneeHyundai Mobis Co., Ltd.
InventorJi Eung Lee
Life of this patent
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Abstract
A headlamp leveling device and a headlamp leveling method. The headlamp leveling device may include a control voltage generator that generates a control voltage based on a width of a pulse, a control integrated circuit (IC) that controls a rotation direction of a motor by comparing a voltage level of a feedback voltage with a voltage level of the control voltage, a shaft position detector that generates a voltage corresponding to a position of the shaft moving with rotation of the motor, and a feedback voltage generator that generates the feedback voltage based on a voltage generated to correspond to the position of the shaft.
Claims17
A headlamp leveling device, comprising:
- a control voltage generator configured to generate a control voltage based on a width of a pulse;
- a control integrated circuit (IC) configured to control a rotation direction of a motor by comparing a voltage level of a feedback voltage with a voltage level of the control voltage;
- a shaft position detector configured to generate a voltage corresponding to a position of the shaft moving with rotation of the motor;
- and
- a feedback voltage generator configured to generate the feedback voltage based on the voltage generated to correspond to the position of the shaft,
- wherein the control IC is configured to:
- control the motor so as to rotate in a first direction when the voltage level of the control voltage is higher than a voltage level of the feedback voltage, and
- control the motor so as to rotate in a second direction when the voltage level of the control voltage is lower than the voltage level of the feedback voltage, and
- wherein the control IC includes:
- a comparator configured to compare the voltage level of the control voltage and the voltage level of the feedback voltage, and
- a motor driver configured to control rotation of the motor based on a result of comparison by the comparator.
A headlamp leveling method comprising:
- generating a control voltage based on a pulse provided from a vehicle system;
- generating a feedback voltage according to a position of a shaft;
- controlling rotation of a motor by comparing a voltage level of the feedback voltage and a voltage level of the control voltage;
- and
- allowing the position of the shaft to be changed, according to the rotation of the motor,
- wherein the controlling of the rotation of the motor includes:
- comparing the voltage level of the feedback voltage and the voltage level of the control voltage,
- rotating the motor in a first direction when the voltage level of the control voltage is higher than the voltage level of the feedback voltage, and
- rotating the motor in a second direction when the voltage level of the control voltage is lower than the voltage level of the feedback voltage.
Dependencies are inferred from the claim text.