COMPLEX RETARDATION FILM AND A WIDE VIEWING TWIST NEMATIC LIQUID CRYSTAL DISPLAY COMPRISING THE SAME, CAPABLE OF REALIZING A COMPLETE DARK CONDITION IN ALL DIRECTIONS TO OBTAIN A WIDE VIEWING ANGLE AND A HIGH CONTRAST RATIO

摘要

PURPOSE: A complex retardation film and a wide viewing twist nematic liquid crystal display comprising the same are provided to accurately model and optically analyze liquid crystal movements, thereby reducing the total amount of leaked light.;CONSTITUTION: In a complex retardation film(60), a retardation film(50), a base layer(24) and a discotic liquid crystal coating layer(25) are successively laminated. The front retardation of the retardation film is 240~340nm. The refractive index ratio of the retardation film is larger than 0.3 and smaller than 0.7. The front retardation of the base layer is less than 10nm. The thickness direction retardation of the base layer is 90~130nm. The front retardation of the discotic liquid crystal coating layer is 30~50nm. When a slow axis(26) is a rotating axis, the slope retardations of the discotic liquid crystal coating layers are respectively 7~13nm and 55~85nm.;COPYRIGHT KIPO 2010