Title:
RETARDATION-LAYER-EQUIPPED POLARIZING PLATE AND IMAGE DISPLAY DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2021/065107
Kind Code:
A1
Abstract:
Provided is a retardation-layer-equipped polarizing plate in which the occurrence of cracking during heating is suppressed. A retardation-layer-equipped polarizing plate according to an embodiment of the present invention comprises: a polarizing plate including a polarizer and a protective layer disposed on one side of the polarizer; and a retardation layer. The polarizer is formed from a polyvinyl-alcohol-based resin film, the orientation function of the polyvinyl alcohol is not greater than 0.30, the retardation layer is a layer formed by oriented solidification of a liquid crystal compound, and the thickness of the protective layer is not greater than 10 μm. Furthermore, a retardation-layer-equipped polarizing plate according to another embodiment of the present invention comprises: a polarizing plate including a polarizer and a protective layer disposed on one side of the polarizer; and a retardation layer. The piercing strength of the polarizer is not less than 30 gf/μm, the retardation layer is a layer formed by oriented solidification of a liquid crystal compound, and the thickness of the protective layer is not greater than 10 μm.
Inventors:
TAKAE KOSUKE (JP)
KAMIJO TAKASHI (JP)
KAWAMIDORI KAZUKI (JP)
KAMIJO TAKASHI (JP)
KAWAMIDORI KAZUKI (JP)
Application Number:
PCT/JP2020/025043
Publication Date:
April 08, 2021
Filing Date:
June 25, 2020
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; G02F1/1335; G02F1/13363; H01L51/50; H05B33/02; H05B33/14
Domestic Patent References:
| WO2019182146A1 | 2019-09-26 | |||
| WO2020021847A1 | 2020-01-30 | |||
| WO2019054272A1 | 2019-03-21 | |||
| WO2016093278A1 | 2016-06-16 |
Foreign References:
| JP2016071348A | 2016-05-09 | |||
| JP2010039299A | 2010-02-18 |
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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