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    Light guide member for lighting device and lighting device
    1.
    发明授权
    Light guide member for lighting device and lighting device 有权

    公开(公告)号：US12210181B2

    公开(公告)日：2025-01-28

    申请号：US18570874

    申请日：2022-06-10

    Applicant: NITTO DENKO CORPORATION

    Inventor： Shimpei Mukadeyama ,  Takahiro Yoshikawa ,  Kozo Nakamura

    IPC: F21V8/00

    Abstract: A lightguide component for illumination devices having an exit surface includes: a lightguide layer having a light-receiving portion to receive light emitted from a light source, a first principal face at the exit surface side, and a second principal face at an opposite side from the first principal face; a light distribution controlling structure having a plurality of internal spaces, each of the plurality of internal spaces including a first slope to direct a portion of light propagating in the lightguide layer toward the exit surface via total internal reflection, and a second slope at an opposite side from the first slope, wherein, when viewed from a normal direction of the first principal face of the lightguide layer, the first slope presents a curved surface that is convex toward the light source; and an anti-reflection layer and/or anti-glare layer disposed at the first principal face side of the lightguide layer.

    Light guide member for illumination device, and illumination device
    2.
    发明授权
    Light guide member for illumination device, and illumination device 有权

    公开(公告)号：US12147068B2

    公开(公告)日：2024-11-19

    申请号：US18568344

    申请日：2022-06-08

    Applicant: NITTO DENKO CORPORATION

    Inventor： Koichi Inoue ,  Yufeng Weng ,  Kozo Nakamura

    IPC: F21V8/00 ,  G02B1/11

    Abstract: A lightguide component for illumination devices having first and second exit surfaces at opposite sides, the lightguide component including: a light-receiving portion to receive light emitted from a light source; a lightguide layer having a first principal face at the first exit surface side and a second principal face at the second exit surface side; and a light distribution controlling structure having a plurality of internal spaces. Each of the plurality of internal spaces includes a first slope to direct a portion of light propagating in the lightguide layer toward the first exit surface via total internal reflection, and a second slope at an opposite side from the first slope, and the lightguide component is configured to emit first light having a first intensity distribution through the first exit surface and to emit second light having a second intensity distribution through the second exit surface.

    Optical member and method for producing same
    4.
    发明授权
    Optical member and method for producing same 有权

    公开(公告)号：US11249238B2

    公开(公告)日：2022-02-15

    申请号：US16982251

    申请日：2019-03-22

    Applicant: NITTO DENKO CORPORATION

    Inventor： Kari Rinko ,  Kozo Nakamura ,  Daisuke Hattori

    IPC: F21V8/00 ,  G09F13/18 ,  G02B6/42 ,  G02B5/02 ,  G09F13/22

    Abstract: The present invention is directed to an optical member including: a first layer that includes a first region having a refractive index n1 and a second region having a refractive index n3; and a second layer disposed on a first main surface of the first layer so as to be in contact with the first region and the second region, the second layer having a refractive index n2. The first layer includes a plurality of said second regions adjoining the first region along a planar direction of the first layer; the plurality of second regions constitute a geometric pattern; and n1 to n3 satisfy the relationship n1

    Light extraction member
    9.
    发明授权
    Light extraction member 有权

    公开(公告)号：US11231543B2

    公开(公告)日：2022-01-25

    申请号：US16778386

    申请日：2020-01-31

    Applicant: NITTO DENKO CORPORATION

    Inventor： Akiko Sugino ,  Kozo Nakamura ,  Daisuke Hattori

    IPC: F21V8/00

    Abstract: Provided is a light extraction member which can be obtained at an adequate cost, while achieving desired light output characteristics without requiring complicated design and structure, and which is easily combined with another member, while exhibiting excellent productivity and excellent handling properties. A light extraction member according to the present embodiment includes: a light guide part which has a first main surface being on the light output side and a second main surface being on the reverse side of the first main surface; and a light output control layer which is a predetermined pattern formed on the first main surface. With respect to this light extraction member, the refractive index n1 of the light guide part and the refractive index n2 of the light output control layer satisfy relational expression n1>n2; and the refractive index n2 of the light output control layer is from 1.01 to 1.30.

    Optical member
    10.
    发明授权
    Optical member 有权

    公开(公告)号：US11112640B2

    公开(公告)日：2021-09-07

    申请号：US16764738

    申请日：2018-10-16

    Applicant: NITTO DENKO CORPORATION

    Inventor： Kozo Nakamura

    IPC: G02F1/1335

    Abstract: There is provided an optical member capable of achieving a liquid crystal display apparatus that is thin and has extremely high brightness. An optical member of the present invention includes: a first member having a function of converting direction of light; and a second member laminated on the first member via an adhesion layer. The adhesion layer has void portions, and non-contact portions are defined at an interface between the adhesion layer and the first member and/or the second member, and the adhesion layer is brought into contact with each of the first member and the second member in four corner portions of the optical member in plan view.

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