Wide screen display device using an endless belt

An image display device comprising:

• a display member formed as an endless belt made of a photochromic material which is optically reversible, said display member allowing information to be written and erased therein, said display member comprising a transparent first layer made of said photochromic material, and a second layer laminated on one surface of said first layer for constituting a reflecting layer;
• an information source separate from said display member for providing information to be written on said display member;
• storage means for storing said information;
• driving means for moving said belt at a controlled speed;
• writing means for writing information in said display member at a predetermined density dependent on exposure time including a light source and shutter;
• erasing means for erasing information which is written in said display member;
• and
• control means for controlling said driving means and said writing means so that said writing means is actuated only when said belt is moving and so that the exposure time of the writing means and the speed of movement of the belt are controlled together to ensure that the information is written at said predetermined density.

An image display device comprising:

• a thermoplastic sheet formed as an endless belt consisting of a transparent conductive film, and a photoconductor and a thermoplastic resin which are applied to said film;
• an information source separate from said sheet for providing information to be written on said sheet;
• storage means for storing said information;
• driving means for moving said belt at a controlled speed;
• charging means for depositing a uniform charge on said sheet;
• illuminating means for selectively illuminating said sheet charged by said charging means in response to said information;
• AC charging means for neutralizing the charge in unexposed portions of said film by an AC charge;
• developing means for heating said sheet, the unexposed portions of which have been neutralized by said AC charging means, so as to produce images due to deformative distortions which correspond to the image signal at a predetermined density dependent on exposure time;
• cooling means for cooling said sheet with the images formed therein so as to fix the images;
• image displaying means for displaying frost images by illuminating said sheet;
• and
• erasing means for erasing the frost images by heating said sheet after the images have been displayed;
• and
• control means for controlling said driving means and said illuminating means, so that said illuminating means is actuated only when said belt is moving and so that the exposure time of the writing means and the speed of movement of the belt are controlled together to ensure that the information is written at said predetermined density.

An image display device comprising:

• a color photochromic sheet formed as an endless belt consisting of a photochromic film absorption of which changes in response to light having predetermined wavelengths, and a repetitive sequence of color filters of red, green and blue which are provided on said photochromic film each in a stripe configuration;
• an information source separate from said sheet for providing information to be written on said sheet;
• storage means for storing said information;
• driving means for moving said belt at a controlled speed;
• illuminating means for selectively illuminating said respective filters of said sheet by light having predetermined wavelengths on a pixel basis in response to said information, thereby forming images at a predetermined density dependent on exposure time which are different in absorption from each other;
• image displaying means for displaying the images formed in said sheet as color images by illuminating said sheet;
• erasing means for erasing said images by heating said sheet after the images have been displayed;
• and
• control means for controlling said driving means and said illuminating means so that said illuminating means is actuated only when said belt is moving and so that the exposure time of the writing means and the speed of movement of the belt are controlled together to ensure that the information is written at said predetermined density.