OPTICAL LAMINATE, POLARIZER, MANUFACTURING METHOD OF POLARIZER, IMAGE DISPLAY UNIT, MANUFACTURING METHOD OF IMAGE DISPLAY UNIT AND VISIBILITY IMPROVEMENT METHOD OF IMAGE DISPLAY UNIT

摘要

PROBLEM TO BE SOLVED: To provide a visibility improvement method of an image display unit, capable of obtaining an image display unit having excellent antireflection performance and contrast in a bright place, even when using an optical laminate having such a light transmissive base material with in-plane birefringence as a polyester film.SOLUTION: Provided is a method for improving visibility of an image display unit having an optical laminate with an optical functional layer, on one surface of a light transmissive base material having in-plane birefringence. The optical laminate is arranged such that a slow axis being a direction in which a refraction index of the light transmissive base material is larger is parallel to a vertical direction of a display screen of the image display unit.