公开(公告)号：US20180003875A1

公开(公告)日：2018-01-04

申请号：US15703293

申请日：2017-09-13

Applicant: FUJIFILM Corporation

Inventor： Yusuke FURUKI ,  Masakane MUTO

IPC: G02B5/30 ,  B32B7/02 ,  H01L27/32

CPC classification number: G02B5/3016 ,  B32B7/02 ,  B32B2307/412 ,  B32B2307/42 ,  B32B2309/105 ,  G02B5/305 ,  H01L27/3232 ,  H01L51/5281 ,  H05B33/22

Abstract: The present invention provides a circularly polarizing plate capable of reducing the amount of change in tint and a difference in reflectivity while achieving thinning of a display device and a display device having the same. The circularly polarizing plate of the present invention includes a polarizer, a transparent support, an optically anisotropic layer including a liquid crystal compound in this order, in which the optically anisotropic layer satisfies Expression (1) and the transparent support has a thickness of 50 μm or less and satisfied Expression (2), 100≦Re(550)≦180 nm . . . (1) and 1.00≦R≦1.20 . . . (2), in Expression (1), Re(550) represents an in-plane retardation of the optically anisotropic layer at a wavelength of 550 nm and in Expression (2), R represents a ratio between a maximum value and a minimum value of modulus of elasticity of the transparent support.

公开(公告)号：US20220397712A1

公开(公告)日：2022-12-15

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

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.

公开(公告)号：US20240310562A1

公开(公告)日：2024-09-19

申请号：US18652412

申请日：2024-05-01

Applicant: FUJIFILM Corporation

Inventor： Yusuke FURUKI ,  Toshihiro KONISHI

IPC: G02B5/30

CPC classification number: G02B5/3016

Abstract: An optical laminate exhibits a change in tint when applied to a display device as a circularly polarizing plate in combination with a polarizer, and the display device is observed from an oblique direction at all azimuthal angles. A circularly polarizing plate, an organic electroluminescent display device, and a display device, each use the optical laminate. The circularly polarizing plate has a polarizer and an optical laminate which has, from the polarizer side, a first positive C-plate, a positive A-plate, and a λ/4 plate, an in-plane slow axis of the positive A-plate and an absorption axis of the polarizer are parallel to each other, an angle formed by the in-plane slow axis of the positive A-plate and an in-plane slow axis of the λ/4 plate is 45°±10°, and a difference in refractive index between the first positive C-plate and the positive A-plate is 0.08 or less.

公开(公告)号：US20240118474A1

公开(公告)日：2024-04-11

申请号：US18511449

申请日：2023-11-16

Applicant: FUJIFILM Corporation

Inventor： Yuta TAKAHASHI ,  Yusuke FURUKI ,  Hiroki KUWAHARA

IPC: G02B5/30

CPC classification number: G02B5/3016

Abstract: A phase difference film includes a small change in tint when the film is applied to a display device as a circularly polarizing plate in combination with a polarizer display device being observed from an oblique direction at all azimuthal angles. The film includes optically anisotropic layers X, Y, and Z in this order, in which layer X is an A-plate, and layers Y and Z are formed by fixing a first and second liquid crystal compound, respectively, twist-aligned along a helical axis extending in a thickness direction, one of the first and second liquid crystal compounds are rod-like liquid crystal compounds, the other first and the second liquid crystal compounds are disk-like liquid crystal compounds, and an in-plane slow axis of layer X is parallel to an in-plane slow axis on a surface of layer Y on layer X side.

公开(公告)号：US20170192145A1

公开(公告)日：2017-07-06

申请号：US15465914

申请日：2017-03-22

Applicant: FUJIFILM Corporation

Inventor： Yusuke FURUKI ,  Naoyoshi YAMADA ,  Masakane MUTO

IPC: G02B5/30 ,  H01L51/52

CPC classification number: G02B5/3016 ,  B32B7/02 ,  G02B5/30 ,  G02B5/3041 ,  H01L51/5281 ,  H01L51/5293 ,  H05B33/02

Abstract: The present invention provides a circularly polarizing plate that improves the visibility of black color in an oblique direction when being applied to a display device and having a small thickness, the display device including a circularly polarizing plate. The circularly polarizing plate is a circularly polarizing plate including, in this order, a polarizer, a λ/2 plate, and a λ/4 plate, in which the λ/2 plate is a laminate of a first A-plate and a first C-plate, the λ/4 plate is a laminate of a second A-plate and a second C-plate, one of the first C-plate and the second C-plate is a cellulose acylate film having a predetermined Rth, and the other of the first C-plate and the second C-plate is an optically anisotropic layer including a liquid crystal compound having a predetermined Rth or a cellulose acylate film having a predetermined Rth.

公开(公告)号：US20150212246A1

公开(公告)日：2015-07-30

申请号：US14677292

申请日：2015-04-02

Applicant: FUJIFILM Corporation

Inventor： Shinpei YOSHIDA ,  Naoyoshi YAMADA ,  Hiroyuki KAIHOKO ,  Yusuke FURUKI

IPC: G02B5/30 ,  B05D5/06

CPC classification number: G02B5/3016 ,  B05D5/06 ,  G02B5/3041 ,  G02B5/3083

Abstract: There are provided a circularly polarizing plate which includes an optically anisotropic layer formed by using a discotic liquid crystal compound and an optically anisotropic layer formed by using a rod-like liquid crystal compound, inhibits an alignment defect of the rod-like liquid crystal compound, and has excellent visibility. The circularly polarizing plate has an optical laminate and a polarizing film.

Abstract translation: 提供了一种圆偏振片，其包括通过使用盘状液晶化合物形成的光学各向异性层和通过使用棒状液晶化合物形成的光学各向异性层，抑制棒状液晶化合物的取向缺陷， 并具有良好的知名度。 圆偏光板具有光学层叠体和偏光膜。