Projection screen using dispersing lens array for asymmetric viewing angle

摘要

Rear projection screens include a film layer having a plurality of lenses for diverging light horizontally and vertically. The horizontal viewing angle created by the lenses may be different from the vertical viewing angle. The light may be directed by the lenses in a particular direction, so that the direction of the maximum intensity light does not lie parallel to an axis normal to the screen surface. The lens film may be combined with an isotropic light disperser, such as a bulk diffuser.