METHOD FOR MANUFACTURING POLARIZING FILM, POLARIZING FILM AND IMAGE DISPLAY DEVICE USING THE SAME

• Main Authors: MIZUSHIMA HIROAKI, SHIMIZU KENJI, AOKI TAKESHI, SUGINO YOICHIRO, KAMEYAMA TADAYUKI, WADA MORIMASA
• Format: Patent
• Language: English
• Published: 13.10.2005
• Edition: 7
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BASIC ELECTRIC ELEMENTS; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; SEMICONDUCTOR DEVICES; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To obtain a method for manufacturing a wide polarizing film which has excellent optical characteristics and in-plane unifomity, to provide the polarizing film obtained by the method, to provide an optical film formed by laminating the polarizing film and another optical layer, and to provide an image display device applying the polarizing film or the optical film. SOLUTION: In the method for manufacturingthe polarizing film having a process for immersing a polymer film in solution and stretching it in a TD direction, it is characterized that a crown roll with stretching in the TD direction is 3% or more of curvatures is used. COPYRIGHT: (C)2006,JPO&NCIPI