Title:
POLARIZING PLATE WITH PHASE DIFFERENCE LAYER, AND IMAGE DISPLAY DEVICE USING THIS
Document Type and Number:
WIPO Patent Application WO/2020/080171
Kind Code:
A1
Abstract:
A polarizing plate with a phase difference layer is provided which is thin, has excellent handling, and excellent optical characteristics. The polarizing plate with a phase difference layer comprises a polarizing plate, which includes a polarizing film, and a protection layer on at least one side of the polarizing film, and a phase difference layer. The polarizing film is configured from a polyvinyl alcohol-base resin film containing a dichroic substance, is at most 8 μm thick, and has a single transmittance of at least 43.0%, and the orthogonal absorbance per 1 μm thickness at the wavelength 550 nm is greater than or equal to 0.85. Re(550) of the phase difference layer is 100-190 nm, and Re(450)/Re(550) is greater than or equal to 0.8 and less than 1. The angle formed between the slow axis of the phase difference layer and the absorption axis of the polarizing membrane is 40°-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/JP2019/039578
Publication Date:
April 23, 2020
Filing Date:
October 08, 2019
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; G02F1/1335; G02F1/13363; G09F9/30; H01L27/32; H01L51/50; H05B33/02; H05B33/14
Domestic Patent References:
| WO2015152157A1 | 2015-10-08 | |||
| WO2014109299A1 | 2014-07-17 |
Foreign References:
| JP2015036729A | 2015-02-23 | |||
| JP2014010291A | 2014-01-20 | |||
| JP2014026266A | 2014-02-06 | |||
| JP2015212817A | 2015-11-26 | |||
| JP2017040907A | 2017-02-23 | |||
| KR20150108263A | 2015-09-25 |
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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