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30 条记录 (耗时 0.023 秒)

    Reflective sheet, decorative sheet, and method of manufacturing reflective sheet
    13.
    发明授权
    Reflective sheet, decorative sheet, and method of manufacturing reflective sheet 有权

    公开(公告)号：US10852459B2

    公开(公告)日：2020-12-01

    申请号：US16836364

    申请日：2020-03-31

    申请人： FUJIFILM Corporation

    发明人： Makoto Ishiguro ,  Nobuhiko Ichihara ,  Michio Nagai

    IPC分类号： G02B5/02 ,  B29D11/00 ,  G02B5/20 ,  B29K105/00

    摘要： Provided are a reflective sheet having selective reflection in a wide wavelength range and a small change in tint depending on angles at which light is visually recognized, a decorative sheet, and a method of manufacturing a reflective sheet, the reflective sheet including a pitch gradient layer in which a helical pitch changes in a thickness direction of the layer. The reflective sheet includes at least one cholesteric liquid crystal layer having wavelength selective reflection properties, in which at least one of the cholesteric liquid crystal layers is a pitch gradient layer in which a helical pitch changes in a thickness direction, a half-width of an integral reflection spectrum of the reflective sheet is 100 nm or longer, and in a case where a wavelength on a short wavelength side that defines the half-width is represented by λα, a wavelength on a long wavelength side that defines the half-width is represented by λβ, a center wavelength that defines the half-width is represented by λC, λ1=(λα+λC/2, and λ2=(λC+λβ)/2, the following Expressions (1) and (2) are satisfied. I−R(λ1)>I−R(λ2)   Expression (1) SCE(λ1)/I−R(λ1)>SCE(λ2)/I−R(λ2)   Expression (2)

    DECORATIVE SHEET, OPTICAL DEVICE, AND IMAGE DISPLAY DEVICE
    14.
    发明申请
    DECORATIVE SHEET, OPTICAL DEVICE, AND IMAGE DISPLAY DEVICE 审中-公开

    公开(公告)号：US20200073173A1

    公开(公告)日：2020-03-05

    申请号：US16678202

    申请日：2019-11-08

    申请人： FUJIFILM Corporation

    发明人： Makoto Ishiguro ,  Nobuhiko Ichihara ,  Michio Nagai

    IPC分类号： G02F1/1335 ,  G02B5/30 ,  B32B7/023

    摘要： Provided are a decorative sheet for making the element using external light, for example, a camera or a sensor inconspicuous to an observer and an optical device and an image display device that include the above-described decorative sheet. The decorative sheet including a circularly polarized light reflecting layer, a λ/4 plate A, a linear polarizer, and a λ/4 plate B in this order, in which the circularly polarized light reflecting layer includes one or more cholesteric liquid crystal layers having wavelength selective reflecting properties, in a case where an integral reflectivity at a wavelength λ nm is represented by I-R(λ), I-R(630), I-R(550), and I-R(450) of the circularly polarized light reflecting layer are 30% or higher, and an angle between a slow axis of the λ/4 plate A and an absorption axis of the linear polarizer and an angle between a slow axis of the λ/4 plate B and the absorption axis of the linear polarizer are 45°±10°, respectively.

    Phase difference film, polarization plate, and liquid crystal display device
    16.
    发明授权
    Phase difference film, polarization plate, and liquid crystal display device 有权

    公开(公告)号：US10215899B2

    公开(公告)日：2019-02-26

    申请号：US14995671

    申请日：2016-01-14

    申请人： FUJIFILM Corporation

    发明人： Jun Takeda ,  Shunya Katoh ,  Michio Nagai ,  Yoji Ito ,  Masaya Suzuki

    IPC分类号： G02F1/1335 ,  G02B5/30 ,  G02F1/13363 ,  G02F1/1337 ,  G02F1/1343

    摘要： A liquid crystal (LC) display device uses a phase difference film which increases front contrast of the device, and a polarization plate. The film includes a first optical anisotropic layer, and a second optical anisotropic layer thereon, the first layer formed by fixing an LC compound in a homogeneous alignment state, has an order parameter (OP) of 0.75 to 0.95, and layer thickness of 0.3 μm to 3.0 μm, the second layer formed by fixing an LC compound in a homeotropic alignment state, has an OP of 0.60 to 0.95, and layer thickness of 0.3 μm to 3.0 μm, the OP which is denoted by OP=(A∥−A⊥)/(2A⊥+A∥), “A∥” which represents absorbance of the LC compound regarding light polarized parallel to an alignment direction, and “A⊥” which represents absorbance of the LC compound regarding light polarized vertical to the alignment direction.

    Retardation film, polarizing plate, and liquid crystal display
    17.
    发明授权
    Retardation film, polarizing plate, and liquid crystal display 有权
    延迟膜，偏光板和液晶显示器

    公开(公告)号：US09383491B2

    公开(公告)日：2016-07-05

    申请号：US14325875

    申请日：2014-07-08

    申请人： FUJIFILM Corporation

    发明人： Jun Takeda ,  Shunya Katoh ,  Michio Nagai ,  Yoji Ito

    IPC分类号： C09K19/00 ,  G02B5/30 ,  G02F1/13363

    CPC分类号： G02B5/3016 ,  G02F1/13363 ,  G02F2001/133633 ,  Y10T428/10 ,  Y10T428/1036 ,  Y10T428/105

    摘要： A retardation film includes a first optically anisotropic layer having liquid crystal compounds fixed in a homogeneously aligned state and a leveling agent, and having an order parameter of 0.75 to 0.95 and a thickness of 0.3 to 3.0 μm; an intermediate layer including a resin having a solubility parameter SP value of 21.5 to 24.7, calculated by Hoy's method, the intermediate layer having a thickness of 3.0 μm or less; and a second optically anisotropic layer having liquid crystal compounds fixed in a homeotropically aligned state, and having an order parameter OP of 0.6 to 0.95 and a thickness of 0.3 to 3.0 μm, wherein OP is represented by the following equation; OP=(A∥−A⊥)/(2A⊥+A∥) where A∥ is absorbance of the liquid crystal compounds for light polarized parallel to an alignment direction, and A⊥ is absorbance of the liquid crystal compounds for light polarized perpendicular to the alignment direction.

    摘要翻译： 延迟膜包括具有均匀取向状态的液晶化合物的第一光学各向异性层和流平剂，并且具有0.75至0.95的顺序参数和0.3至3.0μm的厚度; 中间层，其具有通过Hoy's方法计算的溶度参数SP值为21.5〜24.7的树脂，中间层的厚度为3.0μm以下; 和具有固定在垂直取向状态的液晶化合物的第二光学各向异性层，并且具有0.6至0.95的阶数参数OP和0.3至3.0μm的厚度，其中OP由下式表示; OP =（A∥-A⊥）/（2A⊥+A‖）其中A∥是与取向方向平行偏光的液晶化合物的吸光度，A⊥是用于光偏振垂直的液晶化合物的吸光度 到排列方向。

    Reflective sheet
    18.
    发明授权
    Reflective sheet 有权

    公开(公告)号：US11789185B2

    公开(公告)日：2023-10-17

    申请号：US17214076

    申请日：2021-03-26

    申请人： FUJIFILM Corporation

    发明人： Makoto Ishiguro ,  Hideki Kaneiwa ,  Nobuhiko Ichihara ,  Akira Yamamoto ,  Ryuji Saneto ,  Michio Nagai

    IPC分类号： G02B5/02

    CPC分类号： G02B5/0263 ,  G02B5/0284

    摘要： Provided is a reflective sheet that includes a reflective layer having a wide reflection wavelength range, excellent diffusion reflection properties, and inconspicuous defects. The reflective sheet includes a plurality of reflective layers that are laminated, the reflective layers being obtained by immobilizing a cholesteric liquid crystalline phase, in a cross-section of the reflective layer observed with a scanning electron microscope, at least a part of bright portions and dark portions derived from the cholesteric liquid crystalline phase has a flapping structure, a helical pitch in one or more reflective layers changes in a thickness direction, and a thickness of a reflective layer that is formed on a surface other than a surface of the reflective layer is less than those of other reflective layers.

    Optical element and sensor
    19.
    发明授权
    Optical element and sensor 有权

    公开(公告)号：US11054561B2

    公开(公告)日：2021-07-06

    申请号：US16913858

    申请日：2020-06-26

    申请人： FUJIFILM Corporation

    发明人： Yujiro Yanai ,  Michio Nagai ,  Hiroshi Sato

    IPC分类号： G02B5/30 ,  G01S17/931 ,  G01S7/481 ,  G01S17/10

    摘要： An object is to provide an optical element that is thin and can gather and reflect light in a specific wavelength range in a predetermined direction, and a sensor including the above-described optical element. The optical element includes a cholesteric liquid crystal layer, 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 direction of the optical axis rotates by 180° in the in-plane direction in which the direction of the optical axis changes while continuously rotating is set as a single period, the cholesteric liquid crystal layer has in-plane regions having different lengths of the single periods in the liquid crystal alignment pattern.

    Decorative sheet, optical device, and image display device
    20.
    发明授权
    Decorative sheet, optical device, and image display device 有权

    公开(公告)号：US10831058B2

    公开(公告)日：2020-11-10

    申请号：US16678202

    申请日：2019-11-08

    申请人： FUJIFILM Corporation

    发明人： Makoto Ishiguro ,  Nobuhiko Ichihara ,  Michio Nagai

    IPC分类号： G02F1/1335 ,  G02B5/30

    摘要： Provided are a decorative sheet for making the element using external light, for example, a camera or a sensor inconspicuous to an observer and an optical device and an image display device that include the above-described decorative sheet. The decorative sheet including a circularly polarized light reflecting layer, a λ/4 plate A, a linear polarizer, and a λ/4 plate B in this order, in which the circularly polarized light reflecting layer includes one or more cholesteric liquid crystal layers having wavelength selective reflecting properties, in a case where an integral reflectivity at a wavelength λ nm is represented by I-R(λ), I-R(630), I-R(550), and I-R(450) of the circularly polarized light reflecting layer are 30% or higher, and an angle between a slow axis of the λ/4 plate A and an absorption axis of the linear polarizer and an angle between a slow axis of the λ/4 plate B and the absorption axis of the linear polarizer are 45°±10°, respectively.