Patent ID: 9505197
Filing Date: 2016-11-29
CPC Classification: B32B,Y10T

Claim Text:
1. A method for manufacturing an optical display device using a material roll by bonding an optical film to a surface of an optical display unit, comprising: a cutting and bonding step comprising cutting at least the optical film of a sheet material drawn from the material roll into a predetermined length and bonding a cut piece of the optical film to a surface of the optical display unit, wherein the material roll comprises a roll of the sheet material comprising the optical film having a first surface and a second surface, a first base film provided on the first surface of the optical film with a first pressure-sensitive adhesive layer interposed therebetween, and a second base film provided on the second surface of the optical film with a second pressure-sensitive adhesive layer interposed therebetween, wherein the sheet material has a width corresponding to the length of any one side of the optical display unit, adhering strengths A, B, C, and D satisfy relationships A<B and A<C<D, when the first pressure-sensitive adhesive layer has a first base film-side interface with an adhering strength A, the first pressure-sensitive adhesive layer has an optical film-side interface with an adhering strength B, the second pressure-sensitive adhesive layer has an optical film-side interface with an adhering strength C, and the second pressure-sensitive adhesive layer has an second base film-side interface with an adhering strength D, the sheet material is wound in such a manner that the first base film is located on an outer side and that the second base film is located on an inner side, and the optical film comprises a laminated film comprising at least one of a polarizing film, a retardation film, and a brightness enhancement film.