VIDEO PROJECTION SYSTEM AND POLARIZED GLASSES

摘要

PROBLEM TO BE SOLVED: To project an image by a single image projection means and to observe a stereoscopic image or the like by polarized glasses of simple constitution. SOLUTION: An image based on a video signal having different contents in each field is projected and a liquid crystal shutter 21 provided with an one- side optical shutter part 22 and an otherside optical shutter part 22 divided through an approximate half of a projected beam 26 is arranged on the optical path of the projected beam 26. Both shutter parts 22, 23 are successively and alternately controlled to pass/interrupt the projected beam 26 synchronously with the field frequency of a video signal and a beam passed through the shutter part 22 and a beam passed through the shutter part 23 are projected to a screen as polarized beams having mutually different polarizing directions.