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Title:
OPTICAL LAMINATE
Document Type and Number:
WIPO Patent Application WO/2021/010100
Kind Code:
A1
Abstract:
[Problem] To provide an optical laminate that makes it possible for an optical fingerprint recognition system to be fully functional even when the optical laminate is adhered to the viewing side of an image display element that incorporates the optical fingerprint recognition system and has an emission peak at a wavelength in the range of 430–490 nm. [Solution] An optical laminate that is to be adhered to the viewing side of an image display element that incorporates an optical fingerprint recognition system and has an emission peak at a wavelength of 430–490 nm, the optical laminate being formed by layering a polarizer and a transparent protective film, the average light transmittance Ta (430–490) of the optical laminate at wavelengths of 430–490 nm being no more than 38.5%, the average light transmittance Ta (500–580) of the optical laminate at wavelengths of 500–580 nm being no more than 48%, the average light transmittance Ta (590–680) of the optical laminate at wavelengths of 590–680 nm being no more than 48%, and the average light transmittance Ta (430–490) of the optical laminate being at least 15.2%.

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Inventors:
KOBAYASHI NAOKO (JP)
Application Number:
PCT/JP2020/024514
Publication Date:
January 21, 2021
Filing Date:
June 23, 2020
Export Citation:
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Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
A61B5/1172; G02B5/30; B32B7/023; G06F3/041; G06T1/00; G09F9/00; H01L27/32; H01L51/50; H05B33/02; H05B33/14
Domestic Patent References:
WO2017146212A12017-08-31
WO2013015134A12013-01-31
Foreign References:
JP2017090903A2017-05-25
US20170300736A12017-10-19
JP2017072823A2017-04-13
JP2014199336A2014-10-23
JP2011123476A2011-06-23
Attorney, Agent or Firm:
NAKAYAMA, Tohru et al. (JP)
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