LIGHT DIRECTING FILM HAVING VARIABLE HEIGHT STRUCTURED SURFACE AND LIGHT DIRECTING ARTICLE CONSTRUCTED THEREFROM

摘要

A light directing film (50) including a first surface and a second structure d surface (52). The structured surface (52) includes a repeating pattern of prism zones including at least a first zone having a plurality of prism elements (56) with peaks disposed at a first distance from a reference plane and a second zone having a plurality of pris m elements (54) with peaks disposed less than the first distance from a reference plane. The width of the first zone preferably measures less than about 300 microns.