With a new automotive head-up display (HUD) type, Bosch departs from earlier implementation types: The 'Combiner' type is smaller and significantly more cost-effective than earlier solutions. Although the system has been developed along with BMW, it could soon appear in small cars from other manufacturers.
Combiner head-up display from Bosch.
In any case, the system has been co-developed with BMW. For this reason, it will first be available in vehicles of the Bavarian brand as well as in the new Mini Hatch.
The head-up display depicts navigation information and the vehicle's current speed. In addition, the driver sees current speed limits and other local traffic regulations, provided optionally by a camera-based traffic sign recognition system.
The challenge with designing a combiner HUD is that the tolerance of the front surface has to meet extraordinarily tight specifications. In particular, its edge is shaped in a way that it cannot be detected visually. Thus it creates the impression of seamlessly blending the information depicted with the background.
The light signal is deflected by a series of folding mirrors and projected to the combiner screen that in turn projects the image into the so-called eye box -- the area where the eyes of the drivers are located. Implemented as a self-contained module, the HUD will be integrated into the instrument panel. When deactivated, an electric motor retracts the display screen entirely into its casing. The HUD consists of an image-generating unit and a display unit.
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