Head-up-Display: Infos im Focus

Oct 22, 2013
Additional to the information in the central display a head-up display is a new feature in the C-Class. Like in a jet fighter, it displays important information directly in the driver's field of view on the front windscreen, thus ensuring the driver is distracted less from the road ahead. The system provides information on speed, speed limits, navigation instructions and messages from driver assistance systems.  
The technology is based on mirror optics and a full-colour display module with a resolution of 480 x 240 pixels which is driven by high-power LEDs. They project the virtual image, which measures around 21 x 7 centimetres, into the driver's field of vision where it appears to float around two metres away above the bonnet. The resolution of more than 60 pixels per degree of viewing angle ensures a pin-sharp image. 
A light sensor located near the top edge of the roof automatically adjusts the brightness of the head-up display to the exterior lighting conditions. Brightness levels of 10,000 cd/m² plus can be achieved on sunny days. Since the contrast figure is better than 1000:1, the system produces a high-quality display even in the dark. 
The driver can adjust the height of the virtual image so it can be easily viewed. On vehicles with a seat memory function this feature stores the individual setting. A range of display content can also be enabled or disabled and the brightness of the display adjusted individually.
The special head-up windscreen with its wedge-shaped laminated foil eliminates double images produced by reflections on the outer and inner boundary surfaces of the windscreen. It superimposes the secondary image, which is produced on the outer surface, onto the primary image. This offset depends on the particular angle and has been optimised for a driver in a normal seated position.
Mercedes-Benz C-Class sedan (W205) 2014, Head-up Display