Title:
METHOD FOR MANUFACTURING POLARIZING PLATE WITH PHASE DIFFERENCE LAYER
Document Type and Number:
WIPO Patent Application WO/2023/228597
Kind Code:
A1
Abstract:
Provided is a method with which it is possible to efficiently manufacture a polarizing plate with a phase difference layer in which the absorption axis direction of a polarizer and the slow axis direction of the phase difference layer are extremely precisely controlled. This method for manufacturing a polarizing plate with a phase difference layer according to one embodiment of the present invention includes: punching out, into prescribed sizes, a raw web roll of a phase difference film having a slow axis in the longitudinal direction, while correcting deviations of the slow axis with respect to the longitudinal direction in the width direction of the raw web roll, to obtain a sheet-like phase difference layer intermediate member having the slow axis in the longitudinal direction; punching out, into the same sizes roll of a polarizing plate having an absorption axis in the longitudinal direction, to obtain a sheet-like polarizing plate intermediate member having the absorption axis in a 45° direction relative to the longitudinal direction; affixing together the phase difference layer intermediate member and the polarizing plate intermediate member such that the outer edges align, to obtain a polarizing plate with a phase difference layer intermediate member in which the angle formed between the absorption axis of the polarizing plate and the slow axis of the phase difference layer is 45°; and punching out the polarizing plate with the phase difference layer intermediate member, to obtain a polarizing plate piece with a phase difference layer of a prescribed size having an absorption axis in the longitudinal direction.
Inventors:
TANAKA TAKUYA (JP)
ASANOI YOSHIAKI (JP)
IZAKI AKINORI (JP)
ASANOI YOSHIAKI (JP)
IZAKI AKINORI (JP)
Application Number:
PCT/JP2023/014198
Publication Date:
November 30, 2023
Filing Date:
April 06, 2023
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; B26D3/00; B26F1/44
Domestic Patent References:
| WO2020196306A1 | 2020-10-01 |
Foreign References:
| JP2013161031A | 2013-08-19 | |||
| US20200122417A1 | 2020-04-23 | |||
| JP2018525680A | 2018-09-06 | |||
| US20050128394A1 | 2005-06-16 |
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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