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Patent Searching and Data


Title:
POLARIZATION PLATE AND IMAGE DISPLAY DEVICE USING SAID POLARIZATION PLATE
Document Type and Number:
WIPO Patent Application WO/2021/095541
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a polarization plate with which a decrease in transmittance in a high-temperature environment is suppressed even when used in an image display device with an interlayer filling structure. The present invention provides a polarization plate comprising a polarization element, formed by adsorption-orienting iodine on a polyvinyl alcohol–based resin layer, and a transparent protective film, wherein: a urea-based-compound-containing layer is provided, the layer including at least one type of urea-based compound chosen from the group consisting of urea, urea derivatives, thiourea, and thiourea derivatives; and the water content of the polarization element is at or above the equilibrium water content at a temperature of 20°C and a relative humidity of 30%, and at or below the equilibrium water content at a temperature of 20°C and a relative humidity of 50%.

Inventors:
FUKUDA KENICHI (JP)
NAITOU RYO (JP)
Application Number:
PCT/JP2020/040586
Publication Date:
May 20, 2021
Filing Date:
October 29, 2020
Export Citation:
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Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
C09J11/06; G02B5/30; C09J129/04; G02F1/1335; G09F9/00; G09F9/30; H01L27/32; H01L51/50; H05B33/02
Domestic Patent References:
WO2015137516A12015-09-17
Foreign References:
JP2012108452A2012-06-07
KR20140091217A2014-07-21
KR20130074942A2013-07-05
JP2013064771A2013-04-11
JP2003315537A2003-11-06
JPH0364703A1991-03-20
JP2008102246A2008-05-01
JP2010276815A2010-12-09
JP2014102353A2014-06-05
Attorney, Agent or Firm:
NAKAYAMA, Tohru et al. (JP)
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