公开(公告)号：US20230236353A1

公开(公告)日：2023-07-27

申请号：US18192119

申请日：2023-03-29

Applicant: FUJIFILM Corporation

Inventor： Akiko WATANO ,  Ryuji SANETO ,  Katsumi SASATA ,  Fumitake MITOBE ,  Hiroshi SATO ,  Yukito SAITOH

IPC: F21V8/00 ,  G02B27/01

CPC classification number: G02B6/0056 ,  G02B6/005 ,  G02B6/0026 ,  G02B27/0172 ,  G02B2027/0178 ,  G02B2027/0147

Abstract: Provided is an optical element that can display a clear image having no blurriness in AR glasses or the like. The optical element includes: a substrate; and a laminate that is provided on the substrate and where a plurality of liquid crystal layers obtained by aligning a liquid crystal compound are laminated, in which the liquid crystal layers have a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating in at least one in-plane direction, and in at least one of the liquid crystal layers, an arithmetic mean value of differences between maximum film thicknesses and minimum film thicknesses obtained by observing 10 cross-sections with a scanning electron microscope is 0.1 μm or less.

公开(公告)号：US20230168538A1

公开(公告)日：2023-06-01

申请号：US18159824

申请日：2023-01-26

Applicant: FUJIFILM Corporation

Inventor： Yukito SAITOH ,  Akiko WATANO ,  Fumitake MITOBE ,  Hiroshi SATO ,  Katsumi SASATA

IPC: G02F1/1335

CPC classification number: G02F1/133543 ,  G02F1/133524 ,  G02F1/133536

Abstract: An optical element comprising: a cholesteric liquid crystal layer obtained by cholesteric alignment of a liquid crystal compound, in which the cholesteric liquid crystal layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating in at least one in-plane direction, a helical pitch of a helical axis direction in the cholesteric alignment gradually changes in a thickness direction of the cholesteric liquid crystal layer, and the cholesteric liquid crystal layer has a peak of reflection at each of a first wavelength λ and a second wavelength λ/2.

公开(公告)号：US20230012512A1

公开(公告)日：2023-01-19

申请号：US17901476

申请日：2022-09-01

Applicant: FUJIFILM Corporation

Inventor： Naoyoshi YAMADA ,  Shinichi YOSHINARI ,  Fumitake MITOBE

IPC: G02B5/30 ,  C09K19/56 ,  C09K19/38

Abstract: Provided is a viewing angle control polarizing plate that has asymmetric transmission characteristics, does not cause moire even in a case of being used in combination with a high-definition image display device, and is capable of easily following a curved surface and a viewing angle control system with high productivity. The viewing angle control system includes at least a first polarizer and an optically anisotropic layer, in which an absorption axis of the first polarizer forms an angle of 45° or greater with respect to an in-plane direction, and a main axis of a refractive index of the optically anisotropic layer is tilted in the in-plane direction.

公开(公告)号：US20220342134A1

公开(公告)日：2022-10-27

申请号：US17848105

申请日：2022-06-23

Applicant: FUJIFILM Corporation

Inventor： Fumitake MITOBE ,  Naoya NISHIMURA ,  Takashi KATOU ,  Naoya SHIBATA

IPC: G02B5/30 ,  F21V8/00

Abstract: Provided is a light absorption anisotropic layer including a dichroic substance, in which a transmittance as viewed from a front direction is high and a transmittance as viewed from an oblique direction can be lowered, a laminate, an optical film, an image display device, and a backlight module. The light absorption anisotropic layer includes a liquid crystalline compound and at least one dichroic substance, in which the dichroic substance is aligned perpendicular to the film surface, and an alignment degree of the light absorption anisotropic layer at a wavelength of 550 nm is 0.95 or more.

公开(公告)号：US20220206202A1

公开(公告)日：2022-06-30

申请号：US17697558

申请日：2022-03-17

Applicant: FUJIFILM Corporation

Inventor： Yasukazu KUWAYAMA ,  Fumitake MITOBE ,  Yuzo FUJIKI ,  Jun TAKEDA

IPC: G02B5/30 ,  C09K19/56 ,  G02F1/1335 ,  G09F13/00

Abstract: Provided is a polarizing element which has an excellent antireflection function as being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has the polarizing element. The polarizing element has an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, and an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 to 2.0.

公开(公告)号：US20220146742A1

公开(公告)日：2022-05-12

申请号：US17583433

申请日：2022-01-25

Applicant: FUJIFILM Corporation

Inventor： Fumitake MITOBE ,  Keisuke KODAMA ,  Katsumi SASATA ,  Yukito SAITOH

IPC: F21V8/00 ,  G02B5/18

Abstract: Provided are a backlight unit and a liquid crystal display device including the backlight unit, the backlight unit being capable of switching between viewing angles in the liquid crystal display device and having a configuration in which the brightness values of emitted light on the “+” side and the “−” side at a polar angle with respect to the normal line are symmetric to each other. The backlight unit includes: a light guide plate; a first light source that guides light into the light guide plate from a long side or a short side of the light guide plate; a second light source that guides light into the light guide plate from a side of the light guide plate different from that of the first light source; a first diffraction element that is provided on one main surface of the light guide plate and diffracts only light emitted from one of the first light source or the second light source; a second diffraction element that is provided on another main surface of the light guide plate and diffracts only light emitted from another one of the first light source or the second light source; and a reflection plate that is provided on a surface of the light guide plate opposite to a light emission surface.

公开(公告)号：US20210165148A1

公开(公告)日：2021-06-03

申请号：US17172619

申请日：2021-02-10

Applicant: FUJIFILM Corporation

Inventor： Yuzo FUJIKI ,  Fumitake MITOBE ,  Jun TAKEDA

IPC: G02B5/30 ,  B32B7/023 ,  B32B27/36

Abstract: An object of the present invention is to provide a laminate having excellent display performance and moisture and heat durability in a case of being used in an image display device, and an image display device including the laminate. The laminate of the present invention is a laminate including a light absorption anisotropic film, and a liquid crystal layer which is adjacent to the light absorption anisotropic film, in which the light absorption anisotropic film is a film formed of a composition containing a dichroic material, the liquid crystal layer is a layer which contains a liquid crystal compound aligned therein and has a thickness of 300 nm or less, and an absorption axis of the light absorption anisotropic film and a slow axis of the liquid crystal layer are parallel to each other.

公开(公告)号：US20170362400A1

公开(公告)日：2017-12-21

申请号：US15674097

申请日：2017-08-10

Applicant: FUJIFILM Corporation

Inventor： Fumitake MITOBE ,  Shinya WATANABE ,  Katsumi SASATA ,  Hajime NAKAYAMA

IPC: C08J5/18 ,  G02B1/14 ,  G02B5/30 ,  G02F1/1335

CPC classification number: C08J5/18 ,  C08J2345/00 ,  G02B1/14 ,  G02B5/3033 ,  G02B5/3083 ,  G02F1/133528

Abstract: There is provided an optical film including: a layer A containing a cyclic olefin-based resin; and a layer B containing a cyclic olefin-based resin, and having a thickness thinner than a thickness of the layer A, wherein a glass transition temperature Tg[B] of the layer B is lower than a glass transition temperature Tg[A] of the layer A.