公开(公告)号：US12092847B2

公开(公告)日：2024-09-17

申请号：US18068211

申请日：2022-12-19

Applicant: FUJIFILM Corporation

Inventor： Shinpei Yoshida ,  Yuta Takahashi

IPC: G02B5/30 ,  H10K50/80

CPC classification number: G02B5/3016 ,  H10K50/868

Abstract: Provided is a circularly polarizing plate with which, in a case where a display device obtained by disposing the circularly polarizing plate on a display element is viewed from an oblique direction while the direction thereof is being changed, the display device exhibits little change in tint and has a low reflectivity; and an organic electroluminescent display device. The circularly polarizing plate includes a polarizer and an optically anisotropic layer, in which the optically anisotropic layer is a layer formed by fixing a liquid crystal compound having reverse wavelength dispersibility twist-aligned with a thickness direction as a helical axis, the molecular axis of the liquid crystal compound in the optically anisotropic layer is horizontal to the surface of the optically anisotropic layer, and the twisted angle of the twist-aligned liquid crystal compound is 15° to 360°.

公开(公告)号：US11860339B2

公开(公告)日：2024-01-02

申请号：US18162359

申请日：2023-01-31

Applicant: FUJIFILM Corporation

Inventor： Yuta Fukushima ,  Shinpei Yoshida ,  Yuta Takahashi ,  Keisuke Kodama

IPC: G02B1/111 ,  G02B5/30 ,  H10K59/80

CPC classification number: G02B1/111 ,  G02B5/3016 ,  H10K59/8791

Abstract: The present invention provides an optically anisotropic layer which has a plurality of regions in which alignment states of a liquid crystal compound are different in a thickness direction and in which peeling is unlikely to occur in the layer. The optically anisotropic layer of the present invention is an optically anisotropic layer formed of a liquid crystal compound, in which the optically anisotropic layer contains a leveling agent and satisfies a predetermined requirement in a profile of a secondary ion intensity derived from the leveling agent in a depth direction, which is obtained by analyzing components of the optically anisotropic layer in a depth direction by time-of-flight secondary ion mass spectrometry while irradiating the optically anisotropic layer with an ion beam from one surface of the optically anisotropic layer to the other surface of the optically anisotropic layer.

公开(公告)号：US11860338B2

公开(公告)日：2024-01-02

申请号：US17670921

申请日：2022-02-14

Applicant: FUJIFILM Corporation

Inventor： Akira Maruyama ,  Keisuke Kodama ,  Tetsuro Otsuka ,  Hiroyuki Hagio ,  Yuta Takahashi ,  Shinpei Yoshida ,  Satoshi Yanokuchi

IPC: G02B1/11 ,  G02F1/137 ,  C09K19/04 ,  G02F1/1337 ,  H01J49/40

CPC classification number: G02B1/11 ,  C09K19/04 ,  G02F1/13706 ,  G02F1/13712 ,  G02F1/133711 ,  H01J49/40 ,  C09K2019/0448 ,  G02F2202/022

Abstract: Provided is an optical film with a resin substrate adhered to an optically anisotropic layer and suppression of occurrence of optical defects in the optically anisotropic layer. The optical film has a resin substrate having an alignment regulating force and an optically anisotropic layer arranged thereon, in which the optically anisotropic layer contains a liquid crystal compound and a compound having a heteroatom different from the liquid crystal compound, and in a case where a surface of the optical film on an optically anisotropic layer side thereof is a first surface and a surface of the optical film on a resin substrate side thereof is a second surface, and components of the optical film in a depth direction are analyzed by time-of-flight secondary ion mass spectrometry while irradiating the optical film with an ion beam from the first surface toward the second surface, the obtained profile satisfies a predetermined requirement.

公开(公告)号：US11841521B2

公开(公告)日：2023-12-12

申请号：US17698500

申请日：2022-03-18

Applicant: FUJIFILM Corporation

Inventor： Satoshi Yanokuchi ,  Shinpei Yoshida ,  Yuta Takahashi

IPC: G02B5/30 ,  H10K50/86

CPC classification number: G02B5/3016 ,  H10K50/86

Abstract: Provided is an optical film that has a thin thickness, is suitable in terms of continuous productivity, and exhibits suppressed tinting of black color in a front direction and an oblique direction in a case of being used as a circularly polarizing plate in an organic EL display device; a circularly polarizing plate; and an organic EL display device. The optical film includes an elongated support and a first, a second, and a third optically anisotropic layer in this order, in which a thickness of the elongated support is 10 to 45 μm, the first optically anisotropic layer is formed of a rod-like liquid crystal compound, the second optically anisotropic layer is formed by fixing a twist-aligned liquid crystal compound having a helical axis in a thickness direction, the third optically anisotropic layer is formed of a liquid crystal compound, and each optically anisotropic layer exhibits predetermined optical characteristics.

公开(公告)号：US12124144B2

公开(公告)日：2024-10-22

申请号：US18162379

申请日：2023-01-31

Applicant: FUJIFILM Corporation

Inventor： Shinpei Yoshida ,  Yuta Takahashi ,  Kentaro Yamura ,  Keisuke Kodama

IPC: G02F1/137 ,  G02F1/1333 ,  G02F1/13363 ,  G02F1/1337

CPC classification number: G02F1/137 ,  G02F1/133362 ,  G02F1/133636 ,  G02F1/133738 ,  G02F1/133742

Abstract: Provided is an optically anisotropic layer formed of a liquid crystal compound, which includes first and second layers in direct contact along a thickness direction, an alignment state of the liquid crystal compound in the first layer is different from the second layer, and the optically anisotropic layer satisfies a relationship of Expression (2A) Xmax/Xmin

公开(公告)号：US11834600B2

公开(公告)日：2023-12-05

申请号：US17670906

申请日：2022-02-14

Applicant: FUJIFILM Corporation

Inventor： Keisuke Kodama ,  Yuki Fukushima ,  Shunya Katoh ,  Yuta Takahashi ,  Shinpei Yoshida ,  Satoshi Yanokuchi ,  Akira Maruyama ,  Hiroyuki Hagio

IPC: C09K19/58 ,  G02B5/30 ,  H10K50/86 ,  C09K19/20

CPC classification number: C09K19/588 ,  C09K19/2007 ,  G02B5/3016 ,  H10K50/86 ,  C09K2019/2078

Abstract: Provided is a liquid crystal composition capable of forming an optically anisotropic layer, and method thereof, in which a variation in a twisted angle of liquid crystal compound in an in-plane direction is suppressed an optical film, and a circularly polarizing plate for an organic EL display. The liquid crystal composition contains a liquid crystal, optically active compound A which is a photosensitive optically active compound whose helical twisting power changes upon irradiation with light and has a molar absorption coefficient of 5,000 M−1·cm−1 or more with respect to light having a wavelength of 365 nm, and an optically active compound B having a molar absorption coefficient with respect to light having a wavelength of 365 nm smaller than the molar absorption coefficient of the optically active compound A, in which a mass content ratio of the optically active compound A to the liquid crystal compound is less than 0.01.

公开(公告)号：US11947142B2

公开(公告)日：2024-04-02

申请号：US18169689

申请日：2023-02-15

Applicant: FUJIFILM Corporation

Inventor： Yuta Takahashi ,  Shinpei Yoshida

IPC: G02B5/30 ,  G02F1/13363

CPC classification number: G02B5/3016 ,  G02F1/133638

Abstract: Provided is an optical film in which black tinting is suppressed in front and oblique directions when the optical film is used as a circularly polarizing plate in an organic EL display device. The optical film is an elongated optical film having optically anisotropic layers (A), (B), and (C), in this order, in which layer (A) is formed by fixing a vertically aligned disk-like liquid crystal compound, layer (B) is formed by fixing a twist-aligned rod-like liquid crystal compound with a thickness direction as a helical axis, layer (C) is formed by fixing a vertically aligned rod-like liquid crystal compound, an in-plane slow axis of layer (A) is parallel to an in-plane slow axis on a surface of layer (B) on a layer (A) side, and layers (A) and (B) are disposed such that the in-plane slow axes thereof satisfy a predetermined positional relationship.

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：US10937994B2

公开(公告)日：2021-03-02

申请号：US16658692

申请日：2019-10-21

Applicant: FUJIFILM Corporation

Inventor： Shinpei Yoshida

IPC: H01L51/52 ,  G06F3/041 ,  H01L27/32 ,  G02B5/30 ,  G09F9/00 ,  G09F9/30 ,  H01L51/50 ,  H05B33/02 ,  H05B33/04

Abstract: An organic electroluminescence display device includes, from a visible side, at least: a circular polarization plate; and an organic electroluminescence display element having a pair of electrodes and an organic light emitting layer sandwiched therebetween. A high refractive index layer has a refractive index of greater than 1.7 and less than 2.1 is disposed between the plate and one of the electrodes on the visible side, the plate has a polarizer, a λ/2 plate, and a λ/4 plate in this order from the visible side, a retardation RthA (550) of the λ/2 plate in a thickness direction at a wavelength of 550 nm is within a range of greater than −120 nm and less than −40 nm, and a retardation RthB (550) of the λ/4 plate in a thickness direction at a wavelength of 550 nm is within a range of greater than −60 nm and less than 20 nm.

公开(公告)号：US09977165B2

公开(公告)日：2018-05-22

申请号：US15431237

申请日：2017-02-13

Applicant: FUJIFILM Corporation

Inventor： Shinpei Yoshida ,  Masaaki Suzuki ,  Kazuhiro Amemiya ,  Taketo Otani

IPC: H01L51/52 ,  G02B5/30 ,  B32B27/08 ,  B32B27/30 ,  B32B27/32 ,  B32B27/36

CPC classification number: G02B5/3016 ,  B32B7/02 ,  B32B7/12 ,  B32B27/08 ,  B32B27/286 ,  B32B27/30 ,  B32B27/306 ,  B32B27/32 ,  B32B27/365 ,  B32B2255/10 ,  B32B2255/26 ,  B32B2255/28 ,  B32B2264/102 ,  B32B2270/00 ,  B32B2307/416 ,  B32B2307/42 ,  B32B2307/422 ,  B32B2307/514 ,  B32B2307/706 ,  B32B2457/202 ,  B32B2457/206 ,  C09D1/00 ,  G02B5/30 ,  G02B5/305 ,  G02B5/3083 ,  H01L51/5281

Abstract: The present invention provides an optical laminate which is suppressed in film thickness unevenness of an optically anisotropic layer and is free from point defects, a method of producing the same, and a polarizing plate and an organic EL display device using the optical laminate. The method of producing an optical laminate having an optically anisotropic layer A and an optically anisotropic layer B, includes where the layer A and the layer B are provided in direct contact with each other. The method further includes where both a composition a for forming the layer A and a composition b for forming the layer B contain a fluorine compound, and when the layer A is formed using composition a and layer B is formed using composition b, layer A and layer B are formed in this order under the condition that composition a and composition b satisfy predetermined surface tension relationships.