Title:
POLARIZING PLATE WITH RETARDATION LAYER AND IMAGE DISPLAY DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/080188
Kind Code:
A1
Abstract:
The present invention provides a thin polarizing plate with a retardation layer, said polarizing plate having excellent handling properties and excellent optical characteristics. A polarizing plate with a retardation layer according to the present invention comprises: a polarizing plate which comprises a polarizing film and a protective layer that is arranged on at least one side of the polarizing film; and a retardation layer. The polarizing film is configured of a polyvinyl alcohol resin film that contains a dichroic substance; and the polarizing film has a thickness of 8 μm or less, a single transmittance of 48% or more, and a degree of polarization of 85% or more. The retardation layer has an Re(550) of from 100 nm to 190 nm, with the value of Re(450)/Re(550) being 0.8 or more but less than 1. The angle between the slow axis of the retardation layer and the absorption axis of the polarizing film is from 40° to 50°.
Inventors:
GOTO SHUSAKU (JP)
YAGINUMA HIRONORI (JP)
TOMOHISA HIROSHI (JP)
SHIMIZU TAKASHI (JP)
YAGINUMA HIRONORI (JP)
TOMOHISA HIROSHI (JP)
SHIMIZU TAKASHI (JP)
Application Number:
PCT/JP2019/039640
Publication Date:
April 23, 2020
Filing Date:
October 08, 2019
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; B32B7/023; B32B27/30; B32B27/36; G02F1/1335; G02F1/13363; H01L27/32; H01L51/50; H05B33/02; H05B33/14
Domestic Patent References:
| WO2017073638A1 | 2017-05-04 | |||
| WO2016088683A1 | 2016-06-09 | |||
| WO2019054273A1 | 2019-03-21 |
Foreign References:
| JP2017068282A | 2017-04-06 | |||
| JP2017090700A | 2017-05-25 | |||
| JP2006111797A | 2006-04-27 | |||
| JP2015191224A | 2015-11-02 | |||
| JP2012032418A | 2012-02-16 | |||
| JP2017049363A | 2017-03-09 |
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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