Patent ID: 7468203

Claim:
A window covering, comprising: a unitary piece of film configured for attaching to a window in a wall or opening in a building structure and further configured for distorting images when viewed from an opposite side of the window; the film having a separate discontinuous systematic ordered repeating patterned layer printed with a screen printing process onto a top surface of the film, the screen printing process also blocking the patterned layer from being printed onto other uncovered areas of the top surface of the film leaving those uncovered areas substantially flat and uncovered by the patterned layer; the patterned layer comprising multiple elongated bumps that together form a repeated printed sub-pattern of continuous raised ribs that extend continuously over substantial portions of the top surface film and wherein all of the elongated bumps that together form the raised ribs are each printed directly onto the top surface of the film; wherein the continuous raised ribs formed by the elongated bumps are unevenly spaced apart from adjacent ribs by uncovered asymmetrical flat areas of the top surface of the film that are not covered by the patterned layer; and wherein the continuous raised ribs formed by the patterned layer create surface discontinuities on the top surface of the film that form a textured surface over a substantial portion of the film thereby producing a prismatic effect that primarily allows light to pass through the film but in an uneven and non-uniform non-diffusing manner at refracted random or semi-random angles that distort the viewed images.