US 12,032,189 B2
Phase difference film, circularly polarizing plate, and display device
Yuta Takahashi, Kanagawa (JP); Yusuke Furuki, Kanagawa (JP); and Hiroki Kuwahara, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Nov. 16, 2023, as Appl. No. 18/511,449.
Application 18/511,449 is a continuation of application No. PCT/JP2022/020710, filed on May 18, 2022.
Claims priority of application No. 2021-092451 (JP), filed on Jun. 1, 2021.
Prior Publication US 2024/0118474 A1, Apr. 11, 2024
Int. Cl. G02F 1/1335 (2006.01); G02B 5/30 (2006.01); G02F 1/13363 (2006.01)
CPC G02B 5/3016 (2013.01) [G02F 1/133635 (2021.01); G02F 1/133636 (2013.01); G02F 1/133541 (2021.01)] 17 Claims
OG exemplary drawing
 
1. A phase difference film comprising, in the following order:
an optically anisotropic layer X;
an optically anisotropic layer Y; and
an optically anisotropic layer Z,
wherein the optically anisotropic layer X is an A-plate,
the optically anisotropic layer Y is a layer formed by fixing a first liquid crystal compound twist-aligned along a helical axis extending in a thickness direction,
the optically anisotropic layer Z is a layer formed by fixing a second liquid crystal compound twist-aligned along a helical axis extending in a thickness direction,
one of the first liquid crystal compound and the second liquid crystal compound is a rod-like liquid crystal compound, and the other of the first liquid crystal compound and the second liquid crystal compound is a disk-like liquid crystal compound, and
an in-plane slow axis of the optically anisotropic layer X is parallel to an in-plane slow axis on a surface of the optically anisotropic layer Y on an optically anisotropic layer X side.