公开(公告)号：US11139458B2

公开(公告)日：2021-10-05

申请号：US16750624

申请日：2020-01-23

Applicant: FUJIFILM Corporation

Inventor： Toshihiro Konishi ,  Kenta Yamazaki ,  Shinpei Yoshida ,  Ryo Satake ,  Hiroyuki Okusa

IPC: H01L51/52 ,  H01L27/32 ,  H01L51/00 ,  G02B5/30

Abstract: An organic EL display device is provided in which a change in tint is reduced in a bent portion. This organic EL display device is an organic electroluminescent display device including, from a viewing side, a circularly polarizing plate, a first adhesion layer, and a bendable organic electroluminescent display panel, in which the circularly polarizing plate includes, from the viewing side, a linear polarizer, a second adhesion layer, and a phase difference layer functioning as a λ/4 plate, a complex modulus of elasticity of the first adhesion layer is 2.50×105 Pa or less, the first adhesion layer is thicker than the second adhesion layer, and an absorption axis of the linear polarizer is positioned at an angle of 0°±30° or 90°±30° with respect to an extension direction of a ridge line formed in a case where the organic electroluminescent display device is bent.

公开(公告)号：US12150368B2

公开(公告)日：2024-11-19

申请号：US18169008

申请日：2023-02-14

Applicant: FUJIFILM Corporation

Inventor： Toshihiro Konishi ,  Taro Hashizume

IPC: H10K59/80 ,  G02B5/30 ,  H10K77/10 ,  H10K102/00

Abstract: Provided is a bendable organic EL display device in which change in tint at a bending portion before and after bending is small. The organic electroluminescent display device is a bendable organic electroluminescent display device including a circularly polarizing plate and a bendable organic EL display panel, in which the circularly polarizing plate includes a polarizer and a retardation layer from a viewing side, the retardation layer includes a first optically anisotropic layer formed by fixing a liquid crystal compound twist-aligned along a helical axis extending in a thickness direction, and the first optically anisotropic layer satisfies a predetermined requirement.

公开(公告)号：US11932796B2

公开(公告)日：2024-03-19

申请号：US17886025

申请日：2022-08-11

Applicant: FUJIFILM Corporation

Inventor： Toshikazu Sumi ,  Toshihiro Konishi ,  Chie Moriya

IPC: G02F1/1333 ,  C09K19/06 ,  C09K19/38 ,  C09K19/56

CPC classification number: C09K19/067 ,  C09K19/3823 ,  C09K19/56

Abstract: Provided are a liquid crystal composition, a liquid crystal cured layer, an optical film, a polarizing plate, and an image display device, each of which suppresses streak defects and has excellent temporal stability. The liquid crystal composition includes a liquid crystal compound and a basic compound, in which a pKa of a conjugate acid of the basic compound is 4 to 10.

公开(公告)号：US11550088B2

公开(公告)日：2023-01-10

申请号：US17824536

申请日：2022-05-25

Applicant: FUJIFILM Corporation

Inventor： Yuta Takahashi ,  Yusuke Furuki ,  Toshihiro Konishi ,  Hiroki Kuwahara

IPC: G02B5/30 ,  G02F1/13363

Abstract: Provided are a phase difference film that has a small change in tint in a case where the phase difference film is combined with a polarizer and then applied as a circularly polarizing plate to a display device, and the display device is observed from an oblique direction at all azimuthal angles; as well as a circularly polarizing plate and a display device. The phase difference film includes a first optically anisotropic layer, a second optically anisotropic layer, a third optically anisotropic layer, and a fourth optically anisotropic layer in this order, in which the first optically anisotropic layer is a C-plate, the second optically anisotropic layer is an A-plate, the third optically anisotropic layer is a layer formed by fixing a liquid crystal compound twist-aligned along a helical axis extending in a thickness direction, and the first, second, third, and fourth optically anisotropic layers have a predetermined configuration.