Patent ID: 6809792
Filing Date: 2004-10-26
Classification: G03B,H04N

Abstract:
A pattern display apparatus for forming substantially invisible patterns within serially displayed motion picture image frames of a visually observable motion picture work that is displayed upon a display surface, the apparatus comprising:(a) an infrared light source adapted to provide infrared light within or between displayed motion picture image frames of the motion picture work wherein said substantially invisible patterns comprise an image of the infrared light displayed on the display surface to obscure the displayed motion picture work to recording by a video camera sensitive to visible light and sensitive to infrared light and/or to ultraviolet light; and (b) an ultraviolet light source adapted to provide ultraviolet light within or between displayed motion picture image frames of the motion picture work, wherein said substantially invisible patterns comprises an image of ultraviolet light displayed on the display surface to obscure the displayed motion picture work to recording by the camera.