Video from a backup camera (10) is displayed early on an LCD panel (16). During startup of a system, a display controller (14) performs settings according to preset data from a memory (20), a video signal directly supplied from the backup camera (10) is selected by a selector (54), subjected to resolution conversion and supplied to an LCD panel (16). On the other hand, after the system controller (12) has been started up, a video signal supplied from the system controller (12) is selected by the selector (54) and supplied to the LCD panel (16).