The reality of the traffic conditions as seen by the driver is extended (augmented) in the display system – graphic images placed precisely into the exterior view by means of optical projection embeds information directly into the traffic situation. This makes the AR-HUD a significant enhancement of the human machine interface (HMI) in vehicles.
The AR-HUD has now reached an advanced stage of pre-production development. The demo vehicle is used on one hand to show feasibility, and on the other, it provides valuable insights for series development. Continental is planning to achieve production readiness in 2017.
Fig. 1: System overview of the Augmented Reality Head-up Display
AR-HUD: seeing is understanding
The AR-HUD optical system enables the driver to see an augmented display of the status of driver assistance systems and the significance of this information in their direct field of view. As a new part of the human machine interface, the current, pre-production AR-HUD is already closely connected with the environmental sensors of driver assistance systems, as well as GPS data, map material, and vehicle dynamics data.
Radar sensors are integrated behind the front bumper and a CMOS mono-camera is integrated on the base of the rear view mirror. The Advanced Driver Assistance Systems (ADAS) selected as relevant for the first AR-HUD applications include Adaptive Cruise Control (ACC), route information from the navigation system, and Lane Departure Warning (LDW).
If one of the driver assistance systems detects a relevant situation, virtual graphical information in the AR-HUD makes the driver aware of this. In addition to the direct increase in safety, this form of dialog is also a key technology for automated driving. The augmentation makes it easier for the person driving to build up trust in the new driving functions.
Two picture levels with clearly different projection distances – based on two different picture generation units
In Continental's AR-HUD, two image levels are possible over different projection distances, also called