OPTICAL FILM, OPTICAL STACK AND DISPLAY SYSTEM

An optical stack includes a light control film and an optical film disposed on the light control film. The light control film includes a plurality of visible light transmitting regions separated from each other by one or more visible light absorbing regions. The optical film includes a plurality of microlayers having an F-ratio between about 0.25 to about 0.35 or about 0.65 to about 0.75. The optical film further includes a primary reflection band having a first band edge between about 600 nanometers (nm) and about 700 nm, and a secondary reflection band having a second band edge between about 350 nm and about 460 nm. The plurality of microlayers has an average optical reflectance of greater than about 80% across a FWHM of the primary reflection band for each of mutually orthogonal first and second polarization states.