How It Works

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying HUD System Display

Courtesy of BMW OF NORTH AMERICA, INC.

The image is formed on the projection display and is illuminated by the light source. The curved mirrors and the flat mirror determine the shape and the size of the projected image. If the projected image is not level, this can be corrected by turning the projection display with the flexible shaft.

Fig 2: Identifying HUD Virtual Image Display

Courtesy of BMW OF NORTH AMERICA, INC.

The virtual image appears to float in the air at the end of the bonnet, approx. 2.2 meters away from the observer. The size of the virtual image is approx. 20 x 10 cm (width x height).