Image control system

A rear projection image alignment system comprising:

• a rear projection screen having a front side for viewing and a back side for projecting images thereon;
• a first digital imager for projecting a first pixel image onto the rear projection screen, said first pixel image including a first pixel pattern reference mark located within the first pixel image and distinguishable distinct from the first pixel image;
• a reflecting device located on the back side of said rear projection screen;
• a second digital imager for projecting a second pixel image onto the reflecting device with the reflecting device reflecting the second pixel image onto the rear projection screen, said second pixel image including a second pixel pattern reference mark located within the second pixel image and distinguishably distinct from the second pixel image;
• a camera, said camera positioned behind said rear projection screen with said camera having a field of view encompassing the first pixel pattern reference mark on the first pixel image and the second pixel pattern reference mark on the second pixel image;
• a computer for determining an out-of-alignment deviation signal of the first pixel pattern reference mark with respect to the second pixel pattern reference mark;
• and
• a drive member, said drive member responsive to the out-of-alignment deviation signal for repositioning the reflecting device in response to the out-of-alignment deviation signal so that the first pixel image and the second pixel image can be brought into alignment with each other to produce a single visually seamless image.