Patent ID: 8392073

Claim:
An automatic leveling device comprising: an actuator configured to incline a headlight; and a control unit configured to drive and control the actuator to correct an inclination of an optical axis of the headlight by supplying an instruction position signal to the actuator, the instruction position signal having a value based on a longitudinal inclination of a vehicle, wherein when the actuator is driven and controlled, the control unit is configured to repeat alternately lower value instruction control and upper value instruction control predetermined times, and to supply the instruction position signals such that at least one of lower values and upper values of the instruction position signals runs out of a hysteresis range based on a hysteresis characteristic of the actuator, and wherein the value of the instruction position signal is lowered to a value smaller than a value of an original instruction position in the lower value instruction control, and the value of the instruction position signal is raised to a value larger than the value of the original instruction position in the upper value instruction control.