Manufacturing method and manufacturing system for optical display device

Abstract

The invention is directed to a method for manufacturing an optical display device comprising an optical film including a polarizing plate and a rectangular optical display unit having a surface to which the optical film is bonded, the method comprising the steps of: preparing a material roll which is a roll of a long sheet material obtained by lengthwise slitting a long material comprising an optical film into a width corresponding to a short or long side of the optical display unit, wherein the optical film includes a polarizing plate having a longitudinal direction parallel to its absorption axis; and unwinding the long sheet material from the material roll, cutting at least the optical film of the long sheet material to form an optical film having a length corresponding to a long or short side of the optical display unit, and then bonding the optical film to a surface of the optical display unit.

1 . A system for manufacturing an optical display device comprising an optical film including a polarizing plate and a rectangular optical display unit having a surface to which the optical film is bonded, the system comprising:
 a cutting and bonding unit which performs a process including unwinding a long sheet material from a roll of the long sheet material, wherein the long sheet material is obtained by lengthwise slitting a long material comprising an optical film into a width corresponding to a short or long side of the optical display unit, and the optical film includes a polarizing plate having a longitudinal direction parallel to its absorption axis, cutting at least the optical film of the long sheet material to form an optical film having a length corresponding to a long or short side of the optical display unit, and then bonding the optical film to a surface of the optical display unit.   
     
     
         2 . The system according to  claim 1 , wherein the optical display unit to be used in bonding is a VA or IPS mode liquid crystal panel. 
     
     
         3 . The system according to  claim 1  or  2 , wherein the long material further comprises a pressure-sensitive adhesive layer and a release film. 
     
     
         4 . A system for manufacturing an optical display device comprising an optical film including a polarizing plate and a rectangular optical display unit having a surface to which the optical film is bonded, the system comprising:
 a cutting and bonding unit which performs a process including unwinding a long sheet material from a roll of the long sheet material, wherein the long sheet material is obtained by lengthwise slitting a long material of a laminate into a width corresponding to a short or long side of the optical display unit, wherein the laminate comprises an optical film including a polarizing plate having a longitudinal direction parallel to its absorption axis, a pressure-sensitive adhesive layer and a release film, which are laminated in this order, cutting the optical film and the pressure-sensitive adhesive layer into a length corresponding to a long or short side of the optical display unit, while leaving the release film uncut, and then bonding the optical film to a surface of the optical display unit.