US 12,298,611 B2
Light absorption anisotropic film, viewing angle control system, and image display device
Shinichi Yoshinari, Kanagawa (JP); Shinya Watanabe, Kanagawa (JP); Naoya Shibata, Kanagawa (JP); and Wataru Hoshino, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Jun. 8, 2023, as Appl. No. 18/331,818.
Application 18/331,818 is a continuation of application No. PCT/JP2021/046999, filed on Dec. 20, 2021.
Claims priority of application No. 2020-211373 (JP), filed on Dec. 21, 2020.
Prior Publication US 2023/0314854 A1, Oct. 5, 2023
Int. Cl. G02F 1/13 (2006.01); G02F 1/1333 (2006.01); G02F 1/1335 (2006.01); G02F 1/1337 (2006.01); G02F 1/137 (2006.01)
CPC G02F 1/1323 (2013.01) [G02F 1/133365 (2013.01); G02F 1/133528 (2013.01); G02F 1/133703 (2013.01); G02F 1/133757 (2021.01); G02F 1/13725 (2013.01); G02F 1/13775 (2021.01)] 18 Claims
OG exemplary drawing
 
1. A light absorption anisotropic film comprising:
a light absorption anisotropic layer; and
a first alignment layer adjacent to the light absorption anisotropic layer,
wherein the light absorption anisotropic layer contains a liquid crystal compound and an organic dichroic substance,
an angle between a transmittance central axis of the light absorption anisotropic layer and a normal line of the light absorption anisotropic layer is 5° or greater and less than 45°,
the first alignment layer is a layer formed by fixing a hybrid-aligned polymerizable liquid crystal compound in which an alignment direction of the compound in a thickness direction continuously changes from one surface side to the other surface side, and
a ratio of a mass of the organic dichroic substance to a total mass of a solid content in the light absorption anisotropic layer is 20% to 30% by mass.