LIGHTING DEVICE, AND HEADLIGHT LIGHTING DEVICE, HEADLIGHT, AND VEHICLE USING SAME

摘要

Disclosed is a lighting device comprising: a DC/DC converter which receives a DC power supply and converts the DC supply to a predetermined output required by a load; a voltage detection unit which detects the output voltage or an equivalent value; a current detection unit which detects the output current or an equivalent value; and a control unit which controls the DC/DC converter using the detection values of the voltage detection unit and/or the current detection unit. If a drastic change is detected in the load condition where the change in output within a first predetermined time is equal to or above a predetermined value, the control unit reduces the output.