The present invention relates to a headlight apparatus in which fastening of an occulter is independent from the fastening of a light source. The semiconductor package includes a film substrate for interfacing transmission of signals between a circuit board and a display panel, a semiconductor chip forming an electrical contact point with the film substrate, and a reinforcing plate to which the film substrate and the semiconductor chip are directly attached. Moreover, the imaging device has different spatial sensitivity in different regions of the external environment, which defines a field of view of the imaging device. A first winding 53 of a transformer 51 is connected between first and second connection points 91, 92.