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    Light absorption anisotropic film, optical film, and image display device
    1.
    发明授权
    Light absorption anisotropic film, optical film, and image display device 有权

    公开(公告)号：US12235479B2

    公开(公告)日：2025-02-25

    申请号：US18540153

    申请日：2023-12-14

    Applicant: FUJIFILM Corporation

    Inventor： Fumitake Mitobe ,  Shinya Watanabe ,  Naoya Nishimura

    IPC: G02B5/30 ,  G02B1/08

    Abstract: A light absorption anisotropic film that, in a case of being applied to an image display device, it is possible to suppress redness of an image originating from the image display device, which is reflected on surrounding members arranged around the image display device; and an optical film and an image display device. The light absorption anisotropic film is formed of a composition containing a liquid crystal compound and a dichroic substance, in which the light absorption anisotropic film has two main surfaces facing each other, an angle between a normal direction of the main surface of the light absorption anisotropic film and a transmittance central axis of the light absorption anisotropic film is 0° to 45°, and predetermined requirements are satisfied depending on the angle.

    Optical filter, optical device, and head-mounted display
    2.
    发明授权
    Optical filter, optical device, and head-mounted display 有权

    公开(公告)号：US11933987B2

    公开(公告)日：2024-03-19

    申请号：US17696416

    申请日：2022-03-16

    Applicant: FUJIFILM Corporation

    Inventor： Jun Ishiyama ,  Fumitake Mitobe ,  Yujiro Yanai

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

    CPC classification number: G02B27/0172 ,  G02F1/133509 ,  G02F1/133638 ,  G02B2027/0178

    Abstract: Provided are an optical filter, an optical device, and a head-mounted display which have a high light transmittance in a front direction and a wide real field of view. The optical filter includes a first anisotropic absorption layer, a first retardation layer, and a second anisotropic absorption layer in this order, each of the first anisotropic absorption layer and the second anisotropic absorption layer contains a dichroic colorant, an absorption axis of the dichroic colorant is perpendicular to a main surface, and the first retardation layer has polar angle dependence of retardation that has asymmetry about a normal direction with respect to incident light hitting at least one incident surface including a normal of a layer surface of the first retardation layer.

    Method of forming photo-alignment film and method of forming liquid crystal layer
    3.
    发明授权
    Method of forming photo-alignment film and method of forming liquid crystal layer 有权

    公开(公告)号：US12124061B2

    公开(公告)日：2024-10-22

    申请号：US17702010

    申请日：2022-03-23

    Applicant: FUJIFILM Corporation

    Inventor： Fumitake Mitobe ,  Yukito Saitoh ,  Hiroshi Sato ,  Katsumi Sasata ,  Akiko Watano

    IPC: G02B5/18 ,  G02B5/30

    CPC classification number: G02B5/1857 ,  G02B5/3016

    Abstract: Provided are a method of forming a photo-alignment film having a large size that can appropriately align a liquid crystal compound can be formed and a method of forming a liquid crystal layer having a large size in which alignment defects of a liquid crystal compound can be suppressed. The method of forming a photo-alignment film includes: an exposure step of irradiating a surface of a photo-alignment film including a photo-alignment material that is formed on a support with interference light formed by intersection of two light components such that the surface of the photo-alignment film is exposed to form, on the photo-alignment film, an 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 a moving step of moving the support by a distance D in a direction parallel to the surface of the support and parallel to a straight line formed by optical axes of the two beams, in which the photo-alignment film is exposed by alternately repeating the exposure step and the moving step. Here, the distance D is represented by λ/{2×sin(α/2)}×N−λ/8

    Polarizing element, circularly polarizing plate, and image display device
    6.
    发明授权
    Polarizing element, circularly polarizing plate, and image display device 有权

    公开(公告)号：US11822108B2

    公开(公告)日：2023-11-21

    申请号：US17853282

    申请日：2022-06-29

    Applicant: FUJIFILM Corporation

    Inventor： Yasukazu Kuwayama ,  Fumitake Mitobe ,  Yuzo Fujiki ,  Jun Takeda

    IPC: G02B5/30

    CPC classification number: G02B5/3041 ,  G02B5/3083

    Abstract: The present invention provides 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 a 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, an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 or more and less than 1.78, an in-plane refractive index anisotropy Δn at a wavelength of 550 nm of the alignment film is less than 0.10.

    Optical element and image display apparatus
    8.
    发明授权
    Optical element and image display apparatus 有权

    公开(公告)号：US12066707B2

    公开(公告)日：2024-08-20

    申请号：US17937370

    申请日：2022-09-30

    Applicant: FUJIFILM Corporation

    Inventor： Katsumi Sasata ,  Fumitake Mitobe ,  Hiroshi Sato ,  Yukito Saitoh

    IPC: G02F1/1335 ,  G02B27/01

    CPC classification number: G02F1/133504 ,  G02F1/133524 ,  G02F1/133541 ,  G02F1/133543 ,  G02B27/0172

    Abstract: An optical element includes a light guide plate, an incidence portion, and an emission portion, in which each of the incidence portion and the emission portion includes diffraction portions, the diffraction portion includes diffraction elements, the diffraction element includes a liquid crystal diffraction layer in which a direction of an optical axis of a liquid crystal compound changes while continuously rotating in one in-plane direction, and in a case where the direction in which the direction of the optical axis changes is set as an in-plane rotation direction and a length over which the optical axis rotates by 180° is set as an in-plane period, in-plane rotation directions of liquid crystal diffraction layers of incidence diffraction elements in at least two of a plurality of the incidence diffraction portions are different from each other.

    Laminate
    9.
    发明授权
    Laminate 有权

    公开(公告)号：US11487055B2

    公开(公告)日：2022-11-01

    申请号：US16940798

    申请日：2020-07-28

    Applicant: FUJIFILM Corporation

    Inventor： Naoya Nishimura ,  Fumitake Mitobe ,  Yuzo Fujiki ,  Jun Takeda

    IPC: G02B5/30 ,  G02B1/14 ,  G02B1/04 ,  H01L27/32 ,  H01L51/52 ,  G02F1/13363

    Abstract: An object of the present invention is to provide a laminate in which the coloring of reflected light is reduced. The laminate includes an optical film having a light absorption anisotropic film formed using a composition including a dichroic substance and having a transmittance of more than 50%, a λ/4 plate, and a metal electrode in this order, in which in a case where a degree (%) of polarization at a wavelength of λ of the optical film is defined as P(λ) and a reflectance (%) at the wavelength of λ of the metal electrode is defined as R(λ), a ratio of a minimum value of R/P to a maximum value of R/P at wavelengths of 450 nm, 550 nm, and 650 nm is more than 85%.

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