Cho, Sung-minPark, Soon-ryongLee, Eun-miUSSHIM Y S, CHO S M. Prism sheet of back light unit for LCD: USA 0097708[P]. 2007-05-03.SHIM Y S,CHO S M.Prism sheet of back light unit for LCD. USA0097708 . 2007Shin Y, Choi S, Park S, Lee E. 4-Prism sheet of back light ...