| 摘要 |
PROBLEM TO BE SOLVED: To provide a birefringent film which has small variances in phase difference value and also has phase difference compensation effect and field angle expansion effect. SOLUTION: This film is obtained by giving a shrinkage force to a drawn film having a 0.30 wt.% or less difference in the presence amount of a solvent or plasticizer, among blocks obtained by dividing the film equally into three along the width. A superior Z-alignment coefficient is given by equally distributing the thickness-directional alignment of the film. The variance in phase difference value is made small and the superior phase difference compensation effect and field angle expansion effect are imparted. |
