LAMINATING METHOD OF LIGHT CONDENSATION FILM, LIGHT CONDENSATION FILM LAMINATED BY THE METHOD, AND POLARIZER PLATE, LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a laminating method of a light condensation film in which deformation in a prism shape and lens shape after lamination of the light condensation film and another optical film, and luminance unevenness hardly occurs in an obtained liquid crystal panel and liquid crystal display device, and to provide a light condensation film laminated by the method, and a polarizer plate, liquid crystal panel and liquid crystal display device including the same.SOLUTION: There is provided the manufacturing method of a light condensation film 25 in which the light condensation film 25 having a prism shape or a lens shape on its surface is laminated on a polarizer film 21. The method includes a transportation step of transporting the light condensation film 25 at a prescribed line speed, and a laminating step of laminating the light condensation film 25 transported in the transportation step on the polarizer film 21 while maintaining the transportation state and applying a lamination pressure. The light condensation film 25 is laminated on the polarizer film 21 under a condition that a ratio of the lamination pressure P and the line speed S at the lamination is 2.73 or less.