Patent ID: 6111693
Filing Date: 2000-08-29
Classification: A63B,G03B

Abstract:
A projection screen for displaying projected images with a movable shutter through which, when opened, physical objects and light signals may pass, the projection screen comprising:a main frame having a front frame with an exterior side and an interior side;a shutter assembly mounted to the interior side of the front frame that can be translated, with respect to a first axis and a second axis not parallel to the first axis, to position the shutter assembly at any point within a large area of the front frame, the shutter assembly having a front face plate with an aperture;a number of reflective, flexible sheets attached to the shutter assembly, the number of reflective, flexible sheets fed out from, and taken up by, take-up/supply reels as the shutter assembly is translated, so that the number of reflective, flexible sheets together with the front face plate of the shutter assembly present a continuous reflective surface of the projection screen as the shutter assembly is moved from one position to another position;a number of electrical motors to provide forces to translate the shutter assembly; andan overlying reflective, flexible sheet having an aperture that is mounted between a top motor-driven take-up/supply reel above the front frame and a bottom motor-driven take-up/supply reel below the front frame, the motor-driven take-up/supply reels translating along with the shutter assembly with respect to the first axis so that the overlying reflective, flexible sheet overlies the front face plate of the shutter assembly such that, when the overlying reflective, flexible sheet is positioned under control of the top and bottom motor-driven take-up/supply reels to align the aperture of the overlying reflective, flexible sheet with the aperture of the front face plate of the shutter assembly, the two aligned apertures form an opened shutter within the surface of the projection screen through which physical objects and light signals may pass.