Back projection and/or projection screen incorporating a substrate with a surface effect diffusion layer with a viewing angle of less than or equal to 180 degrees

摘要

A back projection and/or projection screen incorporates at least one first substrate associated with a surface effect diffusion layer adapted to obtain a viewing angle of less than or equal to 180 degrees on each of the faces of the layer. The screen may also include a second tinted substrate and a third substrate.