Title:
POLARIZER
Document Type and Number:
WIPO Patent Application WO/2021/049217
Kind Code:
A1
Abstract:
[Problem] To provide a polarizer which is suppressed in the occurrence of a crack in a dew condensation/heat shock test wherein low-temperature dew condensation conditions (-40°C) and high-temperature conditions (85°C) are repeated, wherein a portion, where iodine loss has occurred, in the edge region is not noticeable. [Solution] A polarizer which is a resin film containing boric acid and iodine, wherein: a low boric acid concentration part, where the boric acid concentration is lower than the boric acid concentration in an inner region that is positioned 500 μm or more inside from the edge, is formed in a region including the edge when viewed in plan; a low iodine concentration part, where the iodine concentration is lower than the iodine concentration in the inner region, is formed in the region including the edge; and the length of the low iodine concentration part from the edge is from 19 μm to 100 μm. [Selected drawing] None
Inventors:
HONSHO YOSHIHITO (JP)
Application Number:
PCT/JP2020/030139
Publication Date:
March 18, 2021
Filing Date:
August 06, 2020
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
G02B5/30; G02F1/1335; H01L27/32; H01L51/50; H05B33/02
Domestic Patent References:
| WO2018139358A1 | 2018-08-02 | |||
| WO2018159376A1 | 2018-09-07 |
Foreign References:
| JP2017058519A | 2017-03-23 | |||
| JP2018025798A | 2018-02-15 | |||
| JP2016206641A | 2016-12-08 | |||
| JP2015094906A | 2015-05-18 | |||
| JP2019148744A | 2019-09-05 | |||
| JP2016151603A | 2016-08-22 |
Attorney, Agent or Firm:
NAKAYAMA, Tohru et al. (JP)
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