Title:
RETARDATION FILM, POLARIZING PLATE WITH RETARDATION LAYER, AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/070512
Kind Code:
A1
Abstract:
Provided is a retardation film which is formed from an inexpensive resin film and is extremely thin, and in which the Nz coefficient is controlled to within a prescribed range. The retardation film according to an embodiment of the present invention is constituted from a polyester resin stretched film, and the Nz coefficient thereof is smaller than 1.8. Here, Nz = (nx – nz)/(nx – ny), where nx is the refractive index in the direction in which the in-plane refractive index is maximized, ny is the refractive index in the direction orthogonal to the direction in which the in-plane refractive index is maximized, and nz is the refractive index in the thickness direction.
Inventors:
NAGAHARA IPPEI (JP)
AZUMA SHINTARO (JP)
AZUMA SHINTARO (JP)
Application Number:
PCT/JP2021/021293
Publication Date:
April 07, 2022
Filing Date:
June 04, 2021
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; G02F1/1335; G02F1/13363; G09F9/00; H01L27/32; H01L51/50; H05B33/02
Domestic Patent References:
| WO2020036101A1 | 2020-02-20 |
Foreign References:
| JPH05157911A | 1993-06-25 | |||
| JP2003121641A | 2003-04-23 | |||
| JP2009134224A | 2009-06-18 | |||
| JP2016109930A | 2016-06-20 | |||
| JP2018017996A | 2018-02-01 |
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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