controlling the brightness, colour or contrast of virtual images depending on the driving conditions or on the condition of the vehicle or the driver

Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles > Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor > using visual output, e.g. blinking lights or matrix displays > Head-up displays [HUD] > controlling the brightness, colour or contrast of virtual images depending on the driving conditions or on the condition of the vehicle or the driver

Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles > Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor > using visual output, e.g. blinking lights or matrix displays > Head-up displays [HUD] (optical aspects of head-up displays G02B27/01) > controlling the brightness, colour or contrast of virtual images depending on the driving conditions or on the condition of the vehicle or the driver