PROJECTION SCREEN WITH MOVABLE SHUTTER

摘要

A projection screen (502) for displaying projected images with a movable shutter that can be positioned and opened at any location within a large rectangular area of the surface of the projection screen (502). Physical objects and light signals may pass through the open shutter (520). When the shutter is closed, the projection screen (502) appears to a viewer as a continuous, unbroken, vertical reflective surface.