Head=up display system for motor vehicle - has hologram reflecting light from display unit in roof to windscreen to provide virtual image

摘要

In the display system, light for the display is reflected from a display unit (6) in the interior roof (5) of the vehicle by a reflecting unit (10) on the dashboard (2). The light is reflected by the windscreen (1) to the eyes (4) of the driver so that he sees a virtual image of the display. The reflecting unit is a hologram providing non-regular reflection. The display unit may include a projector (20) which forms an image on the reflecting unit which is in the form of a reflection-type diffusion plate and a hologram. ADVANTAGE - Reflecting unit is small in size. Region in which eyes may be positioned is large.