Patent ID: 7382335

Claim:
A display apparatus comprising: a plurality of display systems each comprising a light source, a reflection type liquid crystal panel and an optical system; a screen displaying superimposingly the images obtained from said plurality of display systems; means for selecting at least one display system for displaying from said plurality of display systems; switching means for switching the selection of said display systems in said selecting means; an interface to at least one information terminal; and an image processing circuit section, wherein an optical axis of said optical system is inclined relative to a surface of said screen for displaying projected images, and a maximum distance between said screen and an exit pupil is b 2 , and a minimum distance between said screen and the exit pupil is b 1 , while a maximum distance between said liquid crystal panel and an entrance pupil of said optical system is a 2 , and a minimum distance between said liquid crystal panel and the entrance pupil of said optical system is a 1 , the inclination of said liquid crystal panel is so adjusted to minimize the difference between b 1 /a 1 and b 2 /a 2 .