VARIABLE SIZE PROJECTION SCREEN APPARATUS WITH A PROJECTION SCREEN THAT IS PHYSICALLY RESIZABLE IN A LATERAL DIRECTION ON AT LEAST TWO DISTINCT LEVELS, AND A SCREEN ARRANGEMENT FOR USE IN SUCH APPARATUS

摘要

A variable size projection screen apparatus inputs an image and generates a beam to project the image on a screen. A sizing facility can resize the image on the screen in at least two different sizes. A motor arrangement can physically resize the screen in a lateral direction to at least two distinct widths.