| 摘要 |
To provide a method for manufacturing, instead of inclined-orientation optical compensation film using a conventional liquid crystal material, novel inclined-orientation optical compensation film using a non-liquid crystal polymer material which improves the viewing angle characteristics of, for example, a liquid crystal display device in TN mode. The manufacturing method for optical compensation film containing a non-liquid crystal polymer has a melting step for melting the non-liquid crystal polymer and preparing the molten resin; a film-forming step for subjecting the molten non-liquid crystal polymer to shear force using shear force-applying means, and forming a film having an optical path inclined with respect to the direction of thickness; and a stretching step for stretching the film. In this method, the film-forming step is performed under conditions satisfying the relationships in Equation (A) and Equation (B), where T3 is the temperature of the molten non-liquid crystal polymer, TG is the glass transition point of the non-liquid crystal polymer, and T2 is the temperature of the shear force-applying means. (A) T3 > TG + 25ºC; (B) T3 > T2 |
