| abstract |
Provided are an optical film, a liquid crystal display device comprising the same, and a method for preparing a protective film used therein. The optical film of the present invention comprises a polarizer and at least one protective film layered on the polarizer, wherein the in-plane phase difference (Re) of the protective film is 0-500 nm, and the phase difference in the thickness direction (Rth) of the protective film is 1,000-7,000 nm. |