US 12,422,608 B2
Optical film, manufacturing method of light absorption anisotropic layer, and image display device
Naoya Nishimura, Kanagawa (JP); Shinya Watanabe, Kanagawa (JP); Fumitake Mitobe, Kanagawa (JP); and Shinichi Yoshinari, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Dec. 4, 2023, as Appl. No. 18/528,212.
Application 18/528,212 is a continuation of application No. PCT/JP2022/024545, filed on Jun. 20, 2022.
Claims priority of application No. JP2021-105549 (JP), filed on Jun. 25, 2021.
Prior Publication US 2024/0142685 A1, May 2, 2024
Int. Cl. G02B 5/30 (2006.01); G02B 1/11 (2015.01); G02B 1/12 (2006.01); G02F 1/1335 (2006.01)
CPC G02B 5/3016 (2013.01) [G02B 1/11 (2013.01); G02B 1/12 (2013.01); G02F 1/133502 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An optical film comprising:
a light absorption anisotropic layer which contains a liquid crystalline compound and a dichroic substance,
wherein a content of the liquid crystalline compound is 60% to 95% by mass,
an angle θ between a transmittance central axis of the light absorption anisotropic layer and a normal direction of a surface of the light absorption anisotropic layer is 0° or more and 45° or less, and the transmittance central axis denotes a direction of an absorption axis, that is, a major axis direction of a molecule, of the dichroic substance contained in the light absorption anisotropic layer, and
a haze value of the optical film is more than 1% and 20% or less.