A display includes an optical film that has a surface structure, such as a prismatically structured surface for increasing the brightness of the display. The structured surface is bonded to an opposing surface of a second film using a layer of adhesive, by penetrating the structured surface into the...http://www.google.com.au/patents/US6846089?utm_source=gb-gplus-sharePatent US6846089 - Method for stacking surface structured optical films
