It is possible eliminate a fringe pattern produced at the time of incidence of polarized light of a light distribution control element, in which stray light derived from outside unnecessary light in a liquid crystal display apparatus or the like can be effectively reduced, and bright, wide viewing angle...http://www.google.de/patents/US6650472?utm_source=gb-gplus-sharePatent US6650472 - Luminous intensity distribution control device and display having the same
