Head Up Display Control Module

The Head Up Display (HUD) control module is located inside the instrument panel behind the Instrument Cluster (IC).

The HUD control module receives a permanent battery voltage supply via the Rear Junction Box (RJB). A High Speed (HS) Controller Area Network (CAN) comfort bus allows for the HUD control module to communicate with other modules such as the Head Up Display Cooling Fan Control Module (HUDCFCM) and the Instrument Cluster (IC).

The HUD uses laser beams within the module to provide the light source, projecting images stored within the laser diode block, via a collimating lens, onto a Liquid Crystal On Silicone (LCOS) surface, with which the beams have a phase relationship. The light is reflected off a fourier lens and a series of 'fold' mirrors to create an image on a rotating diffuser (this reduces speckle effects of the laser light). The light is magnified and distorted, in cohesion with the windscreen curvature, and passed across two further freeform curved mirrors, forming the virtual image seen by the driver.