IMAGE DISPLAY DEVICE AND SCREEN USED FOR THE SAME

PROBLEM TO BE SOLVED: To display images to persons present in respective diffusion angle ranges from angles corresponding to the diffusion angle ranges, by projecting a plurality of image light beams from respectively different angles to a screen Sc, and diffusing and radiating the image light beams into respectively different diffusion angle ranges.SOLUTION: A plurality of different image light beams are projected to one screen Sc without an overlap nor a gap from directions in an incident angle ranges. The screen Sc diffuses the plurality of projected different image light beams into respectively different directions without an overlap nor a gap in a plurality of diffusion angle ranges, so that a plurality of different images are displayed on the screen Sc toward respectively different directions.