Title:
PHASE DIFFERENCE FILM, PRODUCTION METHOD FOR SAME, POLARIZING PLATE, AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/264593
Kind Code:
A1
Abstract:
According to the present invention, a phase difference film is a positive B plate for which the refractive index nx in an in-plane slow axis direction, the refractive index ny in an in-plane fast axis direction, and the refractive index nz in the thickness direction satisfy nz>nx>ny. The thickness of the phase difference film is preferably 3–9 μm. The front retardation Re of the phase difference film is preferably 12–30 nm. The ratio X (%) of the range of thicknesses to the average thickness of a 10 cm×10 cm area of the phase difference film and the front retardation Re (nm) of the phase difference film preferably satisfy 0.5≤X≤4.5-0.11×Re.
Inventors:
WATANABE YUTA (JP)
ARUGA SOHEI (JP)
ARUGA SOHEI (JP)
Application Number:
PCT/JP2022/013144
Publication Date:
December 22, 2022
Filing Date:
March 22, 2022
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; B32B7/023; B32B27/00; B32B37/14; C08J5/18; G02F1/1335; G02F1/13363
Foreign References:
| JP2019070860A | 2019-05-09 | |||
| JP2016139058A | 2016-08-04 | |||
| JP2008122885A | 2008-05-29 | |||
| JP5585747B1 | 2014-09-10 | |||
| JP2021076759A | 2021-05-20 | |||
| JP2019124781A | 2019-07-25 |
Attorney, Agent or Firm:
HARUKA PATENT & TRADEMARK ATTORNEYS (JP)
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