Various embodiments comprise light recycling films comprising an array of parallel ridges and grooves that form prisms that selectively reflect or transmit light. In some embodiments, the light recycling film may be used in displays that include spatial light modulators comprising a plurality of pixels....http://www.google.ca/patents/US7866871?utm_source=gb-gplus-sharePatent US7866871 - Light enhancing structures with a plurality of arrays of elongate features
