US 12,032,188 B2
Optically anisotropic film, optical film, and display device
Wataru Hoshino, Kanagawa (JP); Madoka Kawai, Kanagawa (JP); Shinya Watanabe, Kanagawa (JP); Takuya Inoue, Kanagawa (JP); Kengo Saito, Kanagawa (JP); and Naoya Nishimura, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Aug. 10, 2023, as Appl. No. 18/447,862.
Application 18/447,862 is a continuation of application No. PCT/JP2022/005646, filed on Feb. 14, 2022.
Claims priority of application No. 2021-022413 (JP), filed on Feb. 16, 2021.
Prior Publication US 2023/0384498 A1, Nov. 30, 2023
Int. Cl. G02B 5/30 (2006.01); C09K 19/38 (2006.01); C09K 19/56 (2006.01); C09K 19/60 (2006.01)
CPC G02B 5/3016 (2013.01) [C09K 19/3852 (2013.01); C09K 19/56 (2013.01); C09K 19/601 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An optically anisotropic film comprising:
a liquid crystal compound; and
a dichroic substance,
wherein the liquid crystal compound is vertically aligned,
the dichroic substance forms an arrangement structure,
in a case where, in a cross section observed with a scanning transmission electron microscope, a length of a major axis of the arrangement structure is defined as L, and a length of a minor axis of the arrangement structure is defined as D, 16 or more arrangement structures satisfying L≥30 nm are observed per 40 μm2, and
wherein a ratio of the number of arrangement structures in which an angle between the major axis of the arrangement structure and a normal direction of the optically anisotropic film is 20° or greater to the number of the arrangement structures is 28.0% or greater.