OPTICAL FILM STACK

摘要

Example light management films are described. In one example, an optical stack comprises a first light directing film comprising a structured major surface opposite a second major surface, the structured major surface comprising a plurality of linear structures extending along a first direction, the light directing film having an average effective transmission of at least 1.3; and an asymmetric light diffuser disposed on the light directing film and being more diffusive along a second direction and less diffusive along a third direction orthogonal to the second direction, the second direction making an angle with the first direction that is greater than zero and less than 60 degrees.