US 12,153,236 B2
Polarizing element, circularly polarizing plate, and image display device
Yasukazu Kuwayama, Kanagawa (JP); Fumitake Mitobe, Kanagawa (JP); Yuzo Fujiki, Kanagawa (JP); and Jun Takeda, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Mar. 17, 2022, as Appl. No. 17/697,558.
Application 17/697,558 is a continuation of application No. 16/587,717, filed on Sep. 30, 2019, granted, now 11,415,733.
Application 16/587,717 is a continuation of application No. PCT/JP2018/014815, filed on Apr. 6, 2018.
Claims priority of application No. 2017-077162 (JP), filed on Apr. 7, 2017; and application No. 2017-119097 (JP), filed on Jun. 16, 2017.
Prior Publication US 2022/0206202 A1, Jun. 30, 2022
Int. Cl. G02B 5/30 (2006.01); C09K 19/56 (2006.01); G02F 1/1335 (2006.01); G09F 13/00 (2006.01); H10K 50/86 (2023.01)
CPC G02B 5/3016 (2013.01) [C09K 19/56 (2013.01); G02F 1/133528 (2013.01); G09F 13/005 (2013.01); C09K 2323/03 (2020.08); C09K 2323/031 (2020.08); G02F 1/133541 (2021.01); H10K 50/865 (2023.02)] 19 Claims
 
1. A polarizing element comprising:
an alignment film; and
an anisotropic light-absorbing film formed using a liquid crystalline composition containing a dichroic substance and a liquid crystalline compound,
wherein the alignment film is a photo-alignment film formed of a composition for forming a photo-alignment film,
wherein the composition for forming the photo-alignment film has a compound having a (meth) acryloyloxy group and a compound having a photoreactive group,
wherein a content of the liquid crystalline compound is 70 to 95 parts by mass with respect to 100 parts by mass of a total amount of the dichroic substance and the liquid crystalline compound in the liquid crystalline composition,
wherein a total content of the dichroic substance is 15% or less by mass with respect to a total solid content mass of the anisotropic light-absorbing film,
wherein a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, and
wherein an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 to 2.0.