A display unit is disposed in front of a driver's seat in a front central
region of a passenger compartment of a vehicle. A sensor senses a
condition, such as a driver's eye position, an outside brightness and a
steering frequency, affecting the uneasiness of a driver caused by the
display screen. A controller reduces the size of a picture display region
in accordance with the condition to achieve an agreeable size and position
of picture on the screen.
