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    TRANSPARENT SCREEN HAVING CHOLESTERIC LIQUID CRYSTAL LAYER, AND TRANSPARENT SCREEN SYSTEM
    22.
    发明申请
    TRANSPARENT SCREEN HAVING CHOLESTERIC LIQUID CRYSTAL LAYER, AND TRANSPARENT SCREEN SYSTEM 审中-公开

    公开(公告)号：US20200012181A1

    公开(公告)日：2020-01-09

    申请号：US16571972

    申请日：2019-09-16

    Applicant: FUJIFILM Corporation

    Inventor： Akira Yamamoto ,  Hideki Kaneiwa ,  Yujiro Yanai ,  Michio Nagai

    IPC: G03B21/62

    Abstract: The present invention provides a transparent screen which is excellent in transparency and in which a reflection part contour at the time of not displaying an image is unlikely to be recognized. An optical sheet of the present invention includes a substrate; and a cholesteric liquid crystal layer on the substrate, in which the entire cholesteric liquid crystal layer is surrounded by an imaginary contour line, the cholesteric liquid crystal layer has a uniform region and a modulation region that is located between the uniform region and at least a part of the imaginary contour line, a shortest distance between the imaginary contour line and the uniform region is 10 mm or longer, and a reflectance of the modulation region monotonously decreases from the uniform region side toward the imaginary contour line side.

    Optical member, method of manufacturing optical member, and image display device
    23.
    发明授权
    Optical member, method of manufacturing optical member, and image display device 有权

    公开(公告)号：US10459132B2

    公开(公告)日：2019-10-29

    申请号：US15704572

    申请日：2017-09-14

    Applicant: FUJIFILM Corporation

    Inventor： Akira Yamamoto ,  Yoji Ito ,  Michio Nagai ,  Daisuke Kashiwagi ,  Nobuhiko Ichihara

    IPC: G02B5/136 ,  G02B1/02 ,  G02B5/02 ,  G02B5/20 ,  G06F3/03 ,  G02B5/26

    Abstract: An optical member includes: a substrate; and a dot formed on a surface of the substrate. The dot has wavelength selective reflecting properties, and a cholesteric structure which has a stripe pattern including bright and dark portions in a cross-sectional view of the dot when observed with a scanning electron microscope. A surface shape of the dot opposite to the substrate in a cross-section of the dot in a thickness direction has at least one inflection point. In the cross-section, an angle between a normal line perpendicular to a line, formed using a first dark portion from a surface of the dot opposite to the substrate, and the surface of the dot, is in a range of 70° to 90°. A proportion of a retroreflective area of the optical member is high when observed after light irradiation from an oblique direction to a normal direction perpendicular to the optical member.

    Member for displaying projected image and projection system
    24.
    发明授权
    Member for displaying projected image and projection system 有权

    公开(公告)号：US10310260B2

    公开(公告)日：2019-06-04

    申请号：US15819533

    申请日：2017-11-21

    Applicant: FUJIFILM Corporation

    Inventor： Yujiro Yanai ,  Akira Yamamoto ,  Michio Nagai ,  Yukito Saitoh ,  Daisuke Kashiwagi ,  Nobuhiko Ichihara

    IPC: G02B27/01 ,  G03B21/60 ,  G02B5/26 ,  B60K35/00 ,  G02F1/137

    Abstract: Provided is a member for displaying a projected image, including: a first base material; a second base material; and an optical member, in which at least one optical member is disposed on a surface of the first base material or the second base material, the optical member includes a plurality of cholesteric liquid crystal dots, the cholesteric liquid crystal dot is formed of a liquid crystal material having a cholesteric structure, the cholesteric structure imparts a striped pattern formed of bright portions and dark portions in a cross-sectional image of the cholesteric liquid crystal dot taken by a scanning electron microscope in a direction perpendicular to a substrate, the dot includes a portion where the height thereof successively increases to the maximum height thereof from an end portion toward the center thereof, an angle between a normal line with respect to a line formed by the first dark portion from the surface of the dot on a side opposite to the substrate and a line representing the surface of the is in a range of 70° to 90° in this portion of the cross-sectional image, and a reflection center wavelength of the dot is in a range of 400 to 1000 nm.

    Transparent screen
    28.
    发明授权
    Transparent screen 有权

    公开(公告)号：US10795254B2

    公开(公告)日：2020-10-06

    申请号：US16015513

    申请日：2018-06-22

    Applicant: FUJIFILM Corporation

    Inventor： Yujiro Yanai ,  Akira Yamamoto ,  Michio Nagai

    IPC: G03B21/62 ,  G03B21/60 ,  G03B21/604 ,  G02F1/1335 ,  G03B21/28

    Abstract: According to the present invention, there is provided a plurality of protruding portions that are formed on one surface of the support and have inclined surfaces parallel to each other; a cholesteric liquid crystal layer that is formed on each of the inclined surfaces of the protruding portions; and an overcoat layer that is laminated on the surface of the support on which the protruding portions are formed so as to cover the cholesteric liquid crystal layer, in which a normal line of each of the inclined surfaces of the protruding portions is parallel to a spiral axis of the cholesteric structure of the cholesteric liquid crystal layer, an angle formed between a normal line of a surface of the overcoat layer and the spiral axis of the cholesteric structure is 5° to 42°, a difference in refractive index between the cholesteric liquid crystal layer and the protruding portion and a difference in refractive index between the cholesteric liquid crystal layer and the overcoat layer are 0.2 or less.

    OPTICAL FILM
    29.
    发明申请
    OPTICAL FILM 审中-公开

    公开(公告)号：US20190302603A1

    公开(公告)日：2019-10-03

    申请号：US16447400

    申请日：2019-06-20

    Applicant: FUJIFILM Corporation

    Inventor： Yujiro Yanai ,  Michio Nagai ,  Akira Yamamoto

    IPC: G03B21/62 ,  G02B5/02 ,  B32B27/08 ,  H04N5/74 ,  B32B38/18 ,  C08J7/04 ,  C09J7/38 ,  C09J7/22 ,  C08F220/10

    Abstract: Provided is an optical film having high contrast and excellent visibility. The optical film includes: a transparent screen; and a transparent reflecting layer that is disposed on one main surface of the transparent screen, in which in the transparent screen, a ratio T15/T30 of a light amount T15 of transmitted light at an angle of 15 degrees with respect to a normal direction of the main surface to a light amount T30 of transmitted light at an angle of 30 degrees with respect to the normal direction of the main surface is 2.0 or higher, and the ratio R15/R30 of the light amount R15 of reflected light at an angle of 15 degrees with respect to the normal direction of the main surface to the light amount R30 of reflected light at an angle of 30 degrees with respect to the normal direction of the main surface is 2.0 or lower.

    Optical member and image display device including optical member
    30.
    发明授权
    Optical member and image display device including optical member 有权

    公开(公告)号：US10222525B2

    公开(公告)日：2019-03-05

    申请号：US15496622

    申请日：2017-04-25

    Applicant: FUJIFILM Corporation

    Inventor： Michio Nagai ,  Yoji Ito ,  Daisuke Kashiwagi ,  Akira Yamamoto ,  Nobuhiko Ichihara ,  Hideyuki Nakamura

    IPC: G06F3/03 ,  G02B5/26 ,  G02F1/13 ,  G06F3/042 ,  G06F3/0354

    Abstract: The optical member of the present invention includes: a substrate; and a dot that is in contact with a surface of the substrate, in which the dot has wavelength selective reflecting properties, the dot is formed of a liquid crystal material having a cholesteric structure, the cholesteric structure has a stripe pattern including bright portions and dark portions in a cross-sectional view of the dot when observed with a scanning electron microscope, the dot includes a portion having a height which continuously increases to a maximum height in a direction moving from an end portion of the dot to the center of the dot, in the portion, an angle between a normal line perpendicular to a line, which is firmed using a first dark portion from a surface of the dot, and the surface is in a range of 70° to 90°, and the liquid crystal material includes a surfactant.

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