公开(公告)号：US20220283465A1

公开(公告)日：2022-09-08

申请号：US17824125

申请日：2022-05-25

Applicant: FUJIFILM Corporation

Inventor： Hiroshi SATO ,  Katsumi SASATA ,  Yukito SAITOH

IPC: G02F1/1335 ,  G02F1/137 ,  G02F1/1337

Abstract: Provided are: a light guide element that includes an intermediate diffraction element to expand exit pupil such that a light utilization efficiency is high and a decrease in the brightness of an image to be displayed can be suppressed; and an image display apparatus. The light guide element includes a light guide plate, an incidence diffraction element, an intermediate diffraction element, and an emission diffraction element, in which the incidence diffraction element, the intermediate diffraction element, and the emission diffraction element include a liquid crystal layer that is formed of 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 changes while continuously rotating in at least one in-plane direction, in a cross-section of the liquid crystal layer observed with a SEM, bright portions and dark portions derived from a liquid crystal phase are tilted with respect to a main surface of the liquid crystal layer, and in a case where an interval between the bright portions or between the dark portions is represented by a ½ pitch, the pitch Pin of the incidence diffraction element and the pitch Pe of the intermediate diffraction element satisfy Pin

公开(公告)号：US20220283434A1

公开(公告)日：2022-09-08

申请号：US17824219

申请日：2022-05-25

Applicant: FUJIFILM Corporation

Inventor： Hiroshi SATO ,  Katsumi SASATA ,  Yukito SAITOH

IPC: G02B27/01 ,  F21V8/00 ,  G02B5/18

Abstract: Provided are: a light guide element in which the occurrence of multiple images can be suppressed and a wide viewing angle can be obtained; and an image display apparatus including this light guide element. The light guide element includes: a light guide plate; and first A, first B, second A, and second B incidence diffraction elements and first A, first B, second A, and second B emission diffraction elements, in which the first A and second A incidence diffraction elements and the first B and second B incidence diffraction elements diffract incident light in different directions to be incident into the light guide plate, periods of diffraction structures of the first A and first B incidence diffraction elements are different from periods of diffraction structures of the second A and second B incidence diffraction elements, periods of diffraction structures of the first A and first B emission diffraction elements are different from periods of diffraction structures of the second A and second B emission diffraction elements, the emission diffraction elements are disposed at overlapping positions in a main surface of the light guide plate, and periodic directions of the diffraction structures of the first A and first B emission diffraction elements intersect with periodic directions of the diffraction structures of the second A and second B emission diffraction elements.

公开(公告)号：US20220066075A1

公开(公告)日：2022-03-03

申请号：US17521595

申请日：2021-11-08

Applicant: FUJIFILM Corporation

Inventor： Yukito SAITOH ,  Katsumi SASATA ,  Hiroshi SATO

IPC: G02B5/18

Abstract: Provided are a liquid crystal diffraction element that diffracts incident light while allowing transmission of the incident light and has wavelength selectivity, and a laminated diffraction element. The liquid crystal diffraction element includes: a first cholesteric liquid crystal layer obtained by cholesteric alignment of a liquid crystal compound; and a second cholesteric liquid crystal layer that is laminated on the first cholesteric liquid crystal layer, in which the first cholesteric liquid crystal layer and the second cholesteric liquid crystal layer 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, a selective reflection wavelength of the first cholesteric liquid crystal layer and a selective reflection wavelength of the second cholesteric liquid crystal layer are the same, and in a case where a length over which the direction of the optical axis derived from the liquid crystal compound in the liquid crystal alignment pattern rotates by 180° in a plane is set as a single period, a single period of the liquid crystal alignment pattern of the first cholesteric liquid crystal layer and a single period of the liquid crystal alignment pattern of the second cholesteric liquid crystal layer are different from each other.

公开(公告)号：US20210373218A1

公开(公告)日：2021-12-02

申请号：US17401477

申请日：2021-08-13

Applicant: FUJIFILM Corporation

Inventor： Yukito SAITOH ,  Hiroshi SATO ,  Katsumi SASATA ,  Shigeaki NIMURA

IPC: G02B5/30 ,  F21V8/00

Abstract: Provided are an optical element, a light guide element, and an image display element in which the occurrence of sidelobe is suppressed. The optical element includes a cholesteric liquid crystal layer that is obtained by immobilizing a cholesteric liquid crystalline phase, in which the cholesteric liquid crystal layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one in-plane direction, and in a case where a birefringence in a thickness region of 80% as a center portion with respect to a thickness of the cholesteric liquid crystal layer is represented by Δn1, a birefringence in a thickness region of 10% from one surface of the cholesteric liquid crystal layer is represented by Δn2, and a birefringence in a thickness region of 10% from another surface of the cholesteric liquid crystal layer is represented by Δn3, at least one of Δn2 or Δn3 is less than Δn1.

公开(公告)号：US20210223581A1

公开(公告)日：2021-07-22

申请号：US17226168

申请日：2021-04-09

Applicant: FUJIFILM Corporation

Inventor： Yukito SAITOH ,  Hiroshi SATO ,  Katsumi SASATA

IPC: G02F1/11 ,  G02F1/1335 ,  G02F1/137

Abstract: Provided are an optical laminate in which a large diffraction angle can be obtained, a light guide element, and an AR display device. The optical laminate includes, in the following order: a first optically-anisotropic layer that is formed of 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 changes while continuously rotating in at least one in-plane direction; a cholesteric liquid crystal layer that is obtained by immobilizing a cholesteric liquid crystalline phase; and a second optically-anisotropic layer that is formed of 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 continuously rotates in at least one in-plane direction, in which in the first optically-anisotropic layer and the second optically-anisotropic layer, the one in-plane directions in which the direction of the optical axis derived from the liquid crystal compound continuously rotates are the same, and rotation directions of the direction of the optical axis derived from the liquid crystal compound in the one in-plane direction are the same.

公开(公告)号：US20210165322A1

公开(公告)日：2021-06-03

申请号：US17169684

申请日：2021-02-08

Applicant: FUJIFILM Corporation

Inventor： Hiroshi SATO ,  Kazuhiro FUJIMAKI

IPC: G03F7/033 ,  G03F7/20 ,  G03F7/00 ,  B41M1/04 ,  B41N1/12

Abstract: An object of the present invention is to provide a water-developable flexographic printing plate precursor, a flexographic printing plate, and a photosensitive resin composition, which can maintain good water developability and can suppress adhesion and aggregation of dispersion in the developer in a case of repeated use and disposal of the aqueous developer. The water-developable flexographic printing plate precursor of the present invention is a water-developable flexographic printing plate precursor including a photosensitive layer, in which the photosensitive layer contains water-dispersible particles, and the water-dispersible particles have a core containing a polymer and having a glass transition temperature of 0° C. or lower and have a shell containing a polymer and having a glass transition temperature of 10° C. or higher.

公开(公告)号：US20210149098A1

公开(公告)日：2021-05-20

申请号：US17158710

申请日：2021-01-26

Applicant: FUJIFILM Corporation

Inventor： Katsumi SASATA ,  Ryoji GOTO ,  Hiroshi SATO ,  Yukito SAITOH

IPC: G02B5/30

Abstract: Provided are an optical element including a first optically-anisotropic layer consisting of a cured layer of a composition including a first liquid crystal compound, in which the first optically-anisotropic layer has 0.24 or more of a refractive index anisotropy Δn550 which is measured with light having a wavelength of 550 nm, the first optically-anisotropic layer has a first liquid crystal alignment pattern in which a direction of an optical axis derived from the first liquid crystal compound continuously changes rotationally in at least one in-plane direction, and in the first liquid crystal alignment pattern, in a case where a length Λ over which the direction of the optical axis rotates 180° in a plane is defined as a single period, the length Λ of the single period is 1.6 μm or less; a method for forming a photo-alignment pattern; and a method for manufacturing an optical element.

公开(公告)号：US20210041610A1

公开(公告)日：2021-02-11

申请号：US17034625

申请日：2020-09-28

Applicant: FUJIFILM Corporation

Inventor： Yukito SAITOH ,  Hiroshi SATO

IPC: G02B5/18

Abstract: An object of the present invention is to provide a light deflection device having a simple structure suitable for reducing the size and weight where a deflection angle can be increased. The object can be achieved with a light deflection device including: a light deflection element that deflects incident light in one direct to be emitted; a driving unit that drives the light deflection element; and a diffraction element that is disposed on a light emission side of the light deflection element in which a periodic structure pitch gradually changes from a center of deflection from the light deflection element toward an outside.

公开(公告)号：US20200381668A1

公开(公告)日：2020-12-03

申请号：US16998875

申请日：2020-08-20

Applicant: FUJIFILM Corporation

Inventor： Yukito SAITOH ,  Hiroshi SATO

IPC: H01L51/52 ,  H01L27/32

Abstract: An object of the present invention is to provide an optical device that can accomplish both the effect of preventing external light reflection and the improvement of utilization efficiency of light emitted from an organic electroluminescent element. The object is achieved by an optical device having an organic electroluminescent substrate, a circularly polarized light-separating layer that has a liquid crystal alignment pattern, in which the direction of an optical axis derived from a liquid crystal compound changes while continuously rotating in one direction in a plane, and separates light into right-handed circularly polarized light and left-handed circularly polarized light, a patterned retardation layer that converts circularly polarized light into linearly polarized light and has a plurality of regions among which the direction of a slow axis varies in the same plane, and a polarizer.

公开(公告)号：US20200326579A1

公开(公告)日：2020-10-15

申请号：US16913897

申请日：2020-06-26

Applicant: FUJIFILM Corporation

Inventor： Hiroshi SATO ,  Yukito SAITOH ,  Katsumi SASATA

IPC: G02F1/1347

Abstract: An object is to provide an optical element in which a wavelength dependence of reflection is small, a light guide element including the optical element, and an image display device including the light guide element. The optical element includes a plurality of cholesteric liquid crystal layers having different selective reflection center wavelengths, in which the cholesteric liquid crystal layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one in-plane direction, and in a case where a length over which the optical axis rotates by 180° in the in-plane direction is set as a single period, a permutation of lengths of selective reflection center wavelengths and a permutation of lengths of the single periods match each other in the cholesteric liquid crystal layers.