Patent ID: 7777832

Claim:
A light management unit for attachment to a display module, including: a) a directionally recycling layer including a structured side and a planar side where the structured side includes prism structures; b) a reflective polarizer adapted to transmit light having a first polarization orientation and to reflect light having a different polarization orientation, wherein the reflective polarizer is positioned on the planar side of the directionally recycling layer; c) a diffusion structure incorporated into the directionally recycling layer or the interfaces between the directional recycling layer and the reflective polarizer, where the diffusion structure diffuses light that passes through the diffusion structure, (i) wherein the diffusion caused by the diffusion structure is sufficient to prevent the appearance of colored bands when a viewer positioned along a line of sight perpendicular to the prism structures views the light management unit at an oblique angle from a vertical axis.