| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a display device which can continuously display several high-resolution images, does not require connection to electric trunks, is based on an optical principle and is simple and inexpensive. SOLUTION: This display device 2 of a self-driving power type for displaying at least two continuously changing images to be observed by an observer has a housing 4 which consists of a lens array 8 having a lens-like front surface and a flat rear surface, at least one displaceable flat symbol carrier 10 which has a film or sheet disposed within the housing 4 apart from the rear surface by a distance at least equal to the focal length of the lens 8 and a battery type DC driving means 14 which periodically displaces the carrier 10 at the distance at least equal to the distance between the two adjacent lenses of the array 8.</p> |
