LCoS can be used as an SLM for phase modulation, using computer generated holography (CGH) to easily implement a holographic information display. By employing this holographic technique, the projection distance (focal distance apparent to the driver) of the HUD could be adjustable. This would be good for navigation because the driver’s eyes do not need to continually refocus between the actual scene image and the projection image. Such phase only holography steers all of the light energy into a specific distribution which forms the projection image. No light energy is blocked during projection, so this display would have good light efficiency.
What are the advantages for HUD using LCOS?
Head-Up Displays (HUDs) in a vehicle can reduce the amount of time that a driver’s attention is diverted from the road ahead, e.g. lookingfor phones, navigation devices, or watching the vehicle dashboard. With eyes more focussed on the road will lead to fewer accidents, and safer drivers all around. LCoS can be used to create such HUDs.