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Home >> BMW >> 2004 >> 645Ci 2D Convertible, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instruments - Si Techniques >> Head-Up Display E60, E61, E63, E64 >> Brief Description Of Components >> Windscreen >> How It Works

How It Works

The wedge-shaped plastic film between the two glasses prevents the projected image from appearing double. The wedge-shaped plastic film aligns the images from the outer and inner glasses, preventing the display from appearing double.

Display with a conventional windscreen  If a conventional windscreen is used, the projected image will be reflected onto both the inner and outer glass. This overlap will cause a double image.