RETARDATION FILM COMPRISING POLYIMIDE COPOLYMER AND DISPLAY DEVICE COMPRISING THE SAME

摘要

The present invention relates to a retardation film. The retardation film includes a polyimide copolymer including a repeated unit represented by a chemical formula 1. An in-plane phase difference value (Rin) calculated by converting the thickness of the film to 4 μm is greater than or equal to 100 nm.