Title:
POLARIZING PLATE WITH RETARDATION LAYER AND PRODUCTION METHOD THEREFOR, AND IMAGE DISPLAY DEVICE USING SAID POLARIZING PLATE WITH RETARDATION LAYER
Document Type and Number:
WIPO Patent Application WO/2022/201907
Kind Code:
A1
Abstract:
Provided is a polarizing plate that is provided with a retardation layer and that can be used to implement an image display device in which a reflection hue change is inhibited in a high temperature environment. The polarizing plate with a retardation layer according to an embodiment of the present invention has: a polarizing plate including a polarizer and a protective layer on at least one side of the polarizer; a first retardation layer disposed on the polarizing plate on a side opposite to the visible side thereof; and a second retardation layer attached, via an adhesive layer, to the first retardation layer on a side opposite to the polarizing plate. The first retardation layer is a retardation layer other than a C plate, and the second retardation layer is a C plate. In one embodiment, the adhesive layer is made of an actinic radiation curable adhesive. The curing shrinkage rate of the adhesive is at least 5%. In another embodiment, a layered product of the first retardation layer and the second retardation layer is subjected to an annealing treatment.
Inventors:
HAYASHI DAISUKE (JP)
KANNO RYO (JP)
KANNO RYO (JP)
Application Number:
PCT/JP2022/004574
Publication Date:
September 29, 2022
Filing Date:
February 07, 2022
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; B32B7/023; G02F1/1335; G02F1/13363; H01L27/32; H01L51/50; H05B33/02; H05B33/14
Domestic Patent References:
| WO2019216076A1 | 2019-11-14 |
Foreign References:
| JP2016136169A | 2016-07-28 | |||
| JP2019066882A | 2019-04-25 | |||
| JP2013037273A | 2013-02-21 |
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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