Volkswagen introduces AR head-up display in the compact class

December 21, 2020 //By Christoph Hammerschmidt
Volkswagen introduces AR head-up display in the compact class
As the first manufacturer to introduce an augmented reality head-up display in volume models of the compact class, V0lkswagen is "democratising" this technology which was previously reserved for expensive luxury saloons. The system, available for the ID.3 and ID.4 electric models, projects electronically generated optical symbols onto the windscreen, providing the driver with dynamic information on route guidance and traffic situation.

The Augmented Reality head-up display projects relevant information onto the windscreen, separated into two fields and levels. The technical heart of the Augmented Reality Head-up Display is the Picture Generation Unit (PGU), which is located deep inside the instrument panel. A high-intensity LCD display sends the beams it generates onto two flat mirrors; special optics separate the components for the near and far planes. The plane mirrors direct the rays onto a large concave mirror with electrical adjustment. From there, they reach the windscreen and thus the driver's field of vision. At an apparent distance of almost 10 metres, the driver sees the symbols just as sharply as the real environment.

The AR Creator, which resides as software in one of the two central computers of Volkswagen's ID. models, serves as the image generator. The AR Creator calculates the placement of the symbols to match the environment. It is based on raw data from the front camera, the radar sensor and the navigation map. The displays that appear in the large window are stabilised against the movements of the car and adapted to the geometry of the projection optics.

The display is divided into two levels - a short-range window and a long-range window. The long-range window shows information from the assistance systems as well as the turn arrows and the start and destination points of the navigation. Below the large long-range window is the short-range window as a flat band. It shows the current speed, the traffic signs and the assistance and navigation symbols as static displays. They appear to hover about three metres in front of the driver.

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