A Head up display (HUD) calibration assembly is designed for coupling a HUD system with the inner walls of a vehicle, and adjusting the orientation of the HUD system. The HUD calibration assembly includes a mounting tray for coupling with a HUD projector and with a HUD combiner deployment mechanism....http://www.google.fr/patents/US7570429?utm_source=gb-gplus-shareBrevet US7570429 - Head up display mechanism