RETARDATION FILM, PRODUCTION METHOD OF THE SAME, POLARIZING PLATE, AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a retardation film and a method for producing the film, showing appropriate optical performances as a retardation film, having high stability to a saponification process and excellent transparency even when the film is made sufficiently thin to be applicable to a roll-to-panel production method, and to provide a polarizing plate and a liquid crystal display device improved in polarization irregularity preventing property, a viewing angle and display uniformity, by incorporating the retardation film into the polarizing plate or the display device.

SOLUTION: The retardation film is produced by successively laminating a core layer containing a specified cellulose ester and a skin layer containing a specified cellulose ester, in an order of the skin layer, the core layer and the skin layer. The film has an in-plane orientation degree Sthof 3.3×10-3or more and an in-plane retardation value Ro exhibiting reverse wavelength dispersibility.

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