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    LIQUID CRYSTAL DIFFRACTION ELEMENT, IMAGE DISPLAY APPARATUS, AND HEAD MOUNTED DISPLAY
    1.
    发明公开
    LIQUID CRYSTAL DIFFRACTION ELEMENT, IMAGE DISPLAY APPARATUS, AND HEAD MOUNTED DISPLAY 审中-公开

    公开(公告)号：US20240319532A1

    公开(公告)日：2024-09-26

    申请号：US18679967

    申请日：2024-05-31

    Applicant: FUJIFILM Corporation

    Inventor： Takashi YONEMOTO ,  Masaaki SUZUKI ,  Koji IIJIMA ,  Hiroshi SATO ,  Ayato SEKINE

    IPC: G02F1/1335 ,  G02B27/01 ,  G02F1/13363

    CPC classification number: G02F1/133504 ,  G02B27/0172 ,  G02F1/13363

    Abstract: Provided are a liquid crystal diffraction element, an image display apparatus, and a head mounted display where occurrence of a ghost in a head mounted display such as VR glasses can be suppressed. The liquid crystal diffraction element includes at least an optically-anisotropic layer that is formed of a liquid crystal composition including a liquid crystal compound, in which the optically-anisotropic layer has a liquid crystal alignment pattern in which an orientation of an optical axis derived from the liquid crystal compound changes while continuously rotating in at least one in-plane direction, in a case where a length over which the optical axis rotates by 180 degrees in the one direction is set as a single period, the single period gradually changes in the one direction, and in a case where an average period of 50 periods in the one direction from a period having a longest length of the single period is represented by Λa and a main surface of the optically-anisotropic layer in a region having a period shorter than or equal to the average period Λa is observed with an optical microscope, both of a ratio between a maximum value and a minimum value among widths of 30 continuous bright lines and a ratio between a maximum value and a minimum value among widths of 30 continuous dark lines in the region are 1.2 or less.

    BEAM COMBINER, METHOD OF FORMING ALIGNMENT FILM, AND METHOD OF MANUFACTURING OPTICAL ELEMENT
    2.
    发明公开
    BEAM COMBINER, METHOD OF FORMING ALIGNMENT FILM, AND METHOD OF MANUFACTURING OPTICAL ELEMENT 审中-公开

    公开(公告)号：US20240329418A1

    公开(公告)日：2024-10-03

    申请号：US18672128

    申请日：2024-05-23

    Applicant: FUJIFILM Corporation

    Inventor： Koji IIJIMA ,  Takashi YONEMOTO ,  Hiroshi SATO ,  Masaaki SUZUKI

    IPC: G02B27/28 ,  G02B5/30 ,  G02B27/09

    CPC classification number: G02B27/283 ,  G02B5/3016 ,  G02B27/0955

    Abstract: Provided are a beam combiner that can form a fine and clear interference pattern, a method of forming an alignment film in which a fine and clear alignment pattern can be obtained, and a method of manufacturing an optical element including a fine and clear liquid crystal alignment pattern. The beam combiner element includes: a beam combiner element that emits light where right/left circularly polarized light components are combined; a polarization separating element that separates incidence light into two right or left circularly polarized light components; and a light control element that focuses or diffuses light and is provided on at least one optical path of circularly polarized light incident into the beam combiner element, in which an absolute value of an ellipticity of circularly polarized light emitted from the beam combiner element is 0.8 or more.

    OPTICAL FILM, POLARIZING PLATE, AND IMAGE DISPLAY DEVICE
    6.
    发明申请
    OPTICAL FILM, POLARIZING PLATE, AND IMAGE DISPLAY DEVICE 审中-公开

    公开(公告)号：US20190170922A1

    公开(公告)日：2019-06-06

    申请号：US16266889

    申请日：2019-02-04

    Applicant: FUJIFILM Corporation

    Inventor： Shunya KATOH ,  Koji IIJIMA ,  Mitsuyoshi ICHIHASHI ,  Masaru YOSHIKAWA

    IPC: G02B5/30 ,  G02F1/1337 ,  G02F1/13363 ,  G02F1/1335 ,  C08F2/44

    Abstract: The present invention provides an optical film exhibiting high alignment and good phase difference development in an oblique direction, and a polarizing plate and an image display device using the same. This optical film of the present invention has a substrate; and a phase difference layer which is provided on the substrate to be adjacent to the substrate, in which the phase difference layer is a layer formed by fixing vertical alignment of a liquid crystal compound having a polymerizable group included in a liquid crystal composition containing the liquid crystal compound and a polymer compound, a difference in δa value between the polymer compound and the substrate, which is calculated using three-dimensional SP values, is 3 or less, and a content of the polymer compound is less than 10 parts by mass with respect to 100 parts by mass of the liquid crystal compound.

    DIFFRACTION ELEMENT
    8.
    发明申请
    DIFFRACTION ELEMENT 有权

    公开(公告)号：US20240427065A1

    公开(公告)日：2024-12-26

    申请号：US18820531

    申请日：2024-08-30

    Applicant: FUJIFILM Corporation

    Inventor： Masaaki SUZUKI ,  Koji IIJIMA

    IPC: G02B5/18 ,  G02B1/08 ,  G02B5/30

    Abstract: Provided is a diffraction element having excellent aligning properties of a liquid crystal compound. The diffraction element includes an optically-anisotropic layer that has a liquid crystal alignment pattern in which an orientation of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one in-plane direction, in which a birefringence Δn of the optically-anisotropic layer is 0.20 or more, the optically-anisotropic layer includes a surfactant, and in a case where components in a depth direction are analyzed by time-of-flight secondary ion mass spectrometry from one surface to another surface of the optically-anisotropic layer, a depth-direction profile of a secondary ion intensity derived from the surfactant is obtained, a position corresponding to a thickness of 20% from the one surface of the optically-anisotropic layer is represented by a position D20, a position corresponding to a thickness of 80% from the one surface is represented by a position D80, and an average value of secondary ion intensities derived from the surfactant between the position D20 and the position D80 is calculated, in a region from the position D20 to the position D80, a peak having a size of 1.1 times or more the average value is observed and a peak having a size of 5 times or more the average value is not observed.

    OPTICAL LAMINATE, POLARIZING PLATE, AND IMAGE DISPLAY DEVICE
    9.
    发明申请
    OPTICAL LAMINATE, POLARIZING PLATE, AND IMAGE DISPLAY DEVICE 有权

    公开(公告)号：US20220404535A1

    公开(公告)日：2022-12-22

    申请号：US17890253

    申请日：2022-08-17

    Applicant: FUJIFILM Corporation

    Inventor： Yutaka NOZOE ,  Kunihiro KASEZAWA ,  Koji IIJIMA

    IPC: G02B5/30

    Abstract: According to the present invention, provided are an optical laminate which has excellent adhesiveness between two optically anisotropic layers, and in which an A plate or a layer obtained by fixing a twist-aligned liquid crystal phase, which is as an optically anisotropic layer, has excellent liquid crystal alignment properties, a polarizing plate, and an image display device. An optical laminate of the present invention has: a first optically anisotropic layer formed of a first liquid crystal compound; a second optically anisotropic layer formed of a second liquid crystal compound; and a mixed layer which is disposed between the first optically anisotropic layer and the second optically anisotropic layer and contains a component derived from the first liquid crystal compound and a component derived from the second liquid crystal compound, the first optically anisotropic layer is a C plate, the second optically anisotropic layer is an A plate or a layer obtained by fixing a twist-aligned liquid crystal phase, the mixed layer further contains a photo-alignment compound, and in an analysis of components of the optical laminate in a depth direction by time-of-flight secondary ion mass spectrometry with ion beam irradiation from a surface of the optical laminate on a first optically anisotropic layer side toward a second optically anisotropic layer side, predetermined requirements are satisfied.

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