公开(公告)号：US20210011319A1

公开(公告)日：2021-01-14

申请号：US17034182

申请日：2020-09-28

Applicant: FUJIFILM Corporation

Inventor： Hiroshi SATO ,  Yukito SAITOH ,  Ayako MURAMATSU ,  Daisuke KASHIWAGI

IPC: G02F1/13363 ,  G02F1/1337 ,  G02B5/18 ,  F21V8/00 ,  G02F1/1335

Abstract: Provided is an optical element in which transmission of incident light with an angle in a predetermined direction is allowed and the brightness of transmitted light is high. The optical element is formed using a composition including a liquid crystal compound and has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound rotates in one direction; and the optically-anisotropic layer has regions in which the optical axis is twisted in a thickness direction of the optically-anisotropic layer and rotates, the regions having different magnitudes of twist angles of the rotation in a plane.

公开(公告)号：US20200285108A1

公开(公告)日：2020-09-10

申请号：US16880997

申请日：2020-05-22

Applicant: FUJIFILM CORPORATION

Inventor： Yukito SAITOH ,  Hiroshi SATO ,  Naoyoshi YAMADA

IPC: G02F1/1335 ,  G02F1/1347 ,  G02F1/13 ,  G02F1/1337

Abstract: A display device includes an image display panel, and a viewing angle switching element includes a first linear polarizer, an optically anisotropic layer, a viewing angle control cell, and a second linear polarizer, in which an angle formed between transmission axes of the first linear polarizer and the second linear polarizer is 45°, the optically anisotropic layer has a function of changing an azimuth of a polarization axis of linearly polarized light emitted from the first linear polarizer and causing the light to be emitted toward the viewing angle control cell, the viewing angle control cell is formed of a vertically aligned liquid crystal cell in which vertically aligned liquid crystals are tilted in one direction by voltage application, and an angle formed between a tilt azimuth of the vertically aligned liquid crystal of the viewing angle control cell and the transmission axis of the second linear polarizer is 45°.

公开(公告)号：US20200271839A1

公开(公告)日：2020-08-27

申请号：US15930881

申请日：2020-05-13

Applicant: FUJIFILM Corporation

Inventor： Yukito SAITOH ,  Hiroshi SATO

IPC: G02B5/30 ,  G02F1/13363 ,  G02B5/18

Abstract: The optical element is an optical element comprising a first optically anisotropic layer which is a cured layer of a liquid crystal composition containing a first disk-like liquid crystal compound, in which the optical element has a liquid crystal alignment pattern in which an optical axis of the first disk-like liquid crystal compound is parallel to a surface of the first optically anisotropic layer, the first optically anisotropic layer is disposed along at least one direction in a plane of the first optically anisotropic layer, and orientation of the optical axis of the first disk-like liquid crystal compound rotationally changes continuously, and the orientation of the optical axis rotates by 180° with a period of 0.5μm to 5μm.

公开(公告)号：US20200249529A1

公开(公告)日：2020-08-06

申请号：US16856618

申请日：2020-04-23

Applicant: FUJIFILM Corporation

Inventor： Naoyoshi YAMADA ,  Yukito SAITOH

IPC: G02F1/13357

Abstract: The planar lighting device includes: a light source; and a brightness homogenizing member that has a laminate structure including high refractive index layers and low refractive index layers, and a light incidence portion that allows light emitted from each of the plurality of point light sources to be incident into the high refractive index layers is provided at a position of the laminate structure facing the point light source. The light incidence portion is formed of a hollow portion that is provided across the two or more high refractive index layers included in the laminate structure to penetrate at least one high refractive index layer and has a function of allowing the light to be incident into the high refractive index layers, and each of the high refractive index layers includes a light extraction mechanism that is provided at a position spaced apart from the light incidence portion.

公开(公告)号：US20190353957A1

公开(公告)日：2019-11-21

申请号：US16529168

申请日：2019-08-01

Applicant: FUJIFILM Corporation

Inventor： Kunihiro ATSUMI ,  Yukito SAITOH

IPC: G02F1/1335 ,  B32B7/02 ,  G09F9/30 ,  H01L27/32 ,  H05B33/02 ,  G02B5/30 ,  G02F1/13363 ,  H01L51/52

Abstract: The present invention provides an organic electroluminescent display device that further suppresses reflection of external light and a change in tint in a case of being viewed in an oblique direction, a phase difference film, and a circularly polarizing plate. This organic electroluminescent display device has an organic electroluminescent display panel and a circularly polarizing plate. The circularly polarizing plate has a polarizer and a phase difference film. The phase difference film has, from the polarizer side, a positive A-plate, a first positive C-plate, and a λ/4 plate. The positive A-plate and the first positive C-plate have predetermined optical properties. The in-plane slow axis of the positive A-plate and the absorption axis of the polarizer are orthogonal to each other. The angle formed between the in-plane slow axis of the positive A-plate and the in-plane slow axis of the λ/4 A plate is 45°±10°.

公开(公告)号：US20190302334A1

公开(公告)日：2019-10-03

申请号：US16445819

申请日：2019-06-19

Applicant: FUJIFILM Corporation

Inventor： Kunihiro ATSUMI ,  Yukito SAITOH ,  Shinichi MORISHIMA

IPC: G02B5/30 ,  C09K19/38 ,  B29C41/00 ,  B29C41/02 ,  B29C33/40

Abstract: A phase difference film is formed by using a liquid crystal compound and that indicates an Nz factor of more than 0 and less than 1, an optical film with same, and a display device. The phase difference film is formed by using a composition including a polymerizable liquid crystal compound having a mesogen group, where an order parameter of the mesogen group in an in-plane slow axis direction of the phase difference film is set as Sx, an order parameter of the mesogen group in a direction orthogonal to the in-plane slow axis direction in a plane is set as Sy, and an order parameter of the mesogen group in a thickness direction of the phase difference film is set as Sz, in a case where the mesogen group has a rod or a disc shape, differing Expressions are satisfied.

公开(公告)号：US20190288240A1

公开(公告)日：2019-09-19

申请号：US16420756

申请日：2019-05-23

Applicant: FUJIFILM Corporation

Inventor： Kunihiro ATSUMI ,  Yukito SAITOH

IPC: H01L51/52 ,  G02B5/30

Abstract: The present invention provides a circularly polarizing plate applied to a display device, which further suppresses reflection of external light and a change in tint when viewed in an oblique direction, and an organic electroluminescent display device. The circularly polarizing plate has a polarizer, a λ/2 plate, and a λ/4 plate in this order, in which an angle formed between an absorption axis of the polarizer and an in-plane slow axis of the λ/4 plate is in a range of 20° to 70°, an Nz factor of the λ/4 plate is 0.30 to 0.70, the absorption axis of the polarizer and an in-plane slow axis of the λ/2 plate are orthogonal or parallel to each other, at Nz factor of the λ/2 plate being 0.10 to 0.40, and the Nz factor of the λ/2 plate being 0.60 to 0.90, respectively.

公开(公告)号：US20190154895A1

公开(公告)日：2019-05-23

申请号：US16253209

申请日：2019-01-21

Applicant: FUJIFILM CORPORATION

Inventor： Ryo SATAKE ,  Yukito SAITOH ,  Daisuke KASHIWAGI

IPC: G02B5/28

Abstract: An optical laminate includes a wavelength selective reflective element, and an absolute phase adjustment layer which is provided on at least one surface side of the wavelength selective reflective element and has optical isotropy, and in which a first region having a first optical path length and a second region having a second optical path length different from the first optical path length are arranged in a pattern with a diffraction grating-like period. The optical laminate reflects light in the specific reflection wavelength region by the wavelength selective reflective element, of light incident from the absolute phase adjustment layer side. In the optical laminate, light which enters the first region of the absolute phase adjustment layer and is reflected by the wavelength selective reflective element and light which enters the second region and is reflected by the wavelength selective reflective element interfere with each other.

公开(公告)号：US20180215843A1

公开(公告)日：2018-08-02

申请号：US15939848

申请日：2018-03-29

Applicant: FUJIFILM Corporation

Inventor： Wataru HOSHINO ,  Yukito SAITOH ,  Kunihiro ATSUMI

IPC: C08F2/44 ,  C08F20/30 ,  C08F20/36 ,  C08L101/12 ,  C09K19/54 ,  G02B5/30 ,  G02F1/13363

CPC classification number: C08F2/44 ,  C08F20/30 ,  C08F20/36 ,  C08F220/36 ,  C08F220/54 ,  C08F228/02 ,  C08F2220/283 ,  C08L101/00 ,  C08L101/12 ,  C09D4/00 ,  C09K19/3098 ,  C09K19/54 ,  C09K2019/0448 ,  C09K2019/122 ,  C09K2019/123 ,  C09K2019/3004 ,  C09K2019/3009 ,  C09K2019/301 ,  C09K2019/3015 ,  C09K2019/3016 ,  C09K2019/3021 ,  C09K2019/3025 ,  C09K2019/3027 ,  C09K2019/3071 ,  C09K2019/3422 ,  C09K2019/3425 ,  G02B5/3016 ,  G02B5/3025 ,  G02F1/13363 ,  G02F1/133634 ,  G02F2001/133633 ,  Y10T428/10 ,  Y10T428/1036 ,  Y10T428/1086 ,  C08F216/06 ,  C08F218/08

Abstract: An optical film including: a cholesteric layer of a disk-like liquid crystal composition including a disk-like liquid crystal compound, in which the cholesteric layer exhibits a cholesteric liquid crystalline phase, and in which fluctuation of a helical pitch in a film thickness direction of the cholesteric layer is 2% or greater, and having a cholesteric liquid crystalline phase of a disk-like liquid crystal compound and a wide reflection bandwidth; a brightness enhancement film; a backlight unit with a brightness enhancement film; and a liquid crystal display device.

公开(公告)号：US20180052264A1

公开(公告)日：2018-02-22

申请号：US15796531

申请日：2017-10-27

Applicant: FUJIFILM Corporation

Inventor： Yukito SAITOH ,  Yujiro YANAI ,  Akira YAMAMOTO ,  Nobuhiko ICHIHARA ,  Daisuke KASHIWAGI ,  Michio NAGAI

IPC: G02B5/26 ,  G03B21/60

CPC classification number: G02B5/26 ,  G02B5/201 ,  G03B21/567 ,  G03B21/60 ,  G03B21/62

Abstract: A transparent screen includes a substrate capable of transmitting light; and a plurality of dots formed on a surface of the substrate, each of the dots having wavelength-selective reflectivity and being formed of a liquid crystal material having a cholesteric structure, in which the cholesteric structure gives a striped pattern of bright parts and dark parts in a cross-sectional view of the dot observed by a scanning electron microscope, the dot includes a portion having a height that increases continuously to the maximum height in a direction extending from the edge toward the center of the dot, the angle formed by the normal line to a line that is formed by a first one of the dark parts as counted from the surface of the dot on the opposite side of the substrate and the surface of the dot, in the portion, is in the range of 70° to 90°, and a plurality of dot row units in which two or more dots are adjacently arranged along one direction are formed.