An optical noise reduction mechanism for reducing undesired frustration of total internal reflected light. Such optical noise may stem from defects in waveguide construction. Such optical noise may also stem from the difference in refractive index between any cladding layers disposed onto the planar...http://www.google.ca/patents/US20070047887?utm_source=gb-gplus-sharePatent US20070047887 - Reducing light leakage and improving contrast ratio performance in FTIR display devices
