公开(公告)号：US20200166694A1

公开(公告)日：2020-05-28

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.

公开(公告)号：US20240409789A1

公开(公告)日：2024-12-12

申请号：US18697381

申请日：2022-09-12

Applicant: NITTO DENKO CORPORATION

Inventor： Akiko SUGINO ,  Tomokazu TAKAHASHI ,  Daisuke HATTORI ,  Chie HAMADA ,  Toshiya YOSHIMI

IPC: C09J7/38

Abstract: A laminate includes: a void-containing layer and a pressure-sensitive adhesive/adhesive layer. The pressure-sensitive adhesive/adhesive layer is directly laminated on one surface or both surfaces of the void-containing layer. The pressure-sensitive adhesive/adhesive layer contains a (meth)acrylic polymer, and nanoindentation hardness of the pressure-sensitive adhesive/adhesive layer is 0.1 MPa or more and 1.0 MPa or less.

公开(公告)号：US20230350129A1

公开(公告)日：2023-11-02

申请号：US17914436

申请日：2021-03-29

Applicant: NITTO DENKO CORPORATION

Inventor： Takahiro YOSHIKAWA ,  Daisuke HATTORI ,  Ryota MORISHIMA ,  Atsushi KISHI

IPC: F21V8/00

CPC classification number: G02B6/0055 ,  G02B6/0088

Abstract: A backlight unit includes: a light source; a light guide plate arranged to face the light source, having an end surface that light from the light source enters; and an emitting surface from which the entered light is emitted; a reflective plate bonded to a back surface side of the light guide plate via a double-sided pressure-sensitive adhesive film; and a casing having a front portion and a back portion, the casing configured to store the light source, the light guide plate, and the reflective plate. The backlight unit is configured so that light from the light source is free from entering a space between the low-refractive index layer and the reflective plate, or so that light that has entered the space between the low-refractive index layer and the reflective plate from a light source is free from being emitted from the emitting surface of the light guide plate.

公开(公告)号：US20210048575A1

公开(公告)日：2021-02-18

申请号：US16982251

申请日：2019-03-22

Applicant: NITTO DENKO CORPORATION

Inventor： Kari RINKO ,  Kozo NAKAMURA ,  Daisuke HATTORI

IPC: F21V8/00 ,  G02B5/02

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

公开(公告)号：US20220035090A1

公开(公告)日：2022-02-03

申请号：US17400785

申请日：2021-08-12

Applicant: NITTO DENKO CORPORATION

Inventor： Kari RINKO ,  Kozo NAKAMURA ,  Daisuke HATTORI

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

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

公开(公告)号：US20170341336A1

公开(公告)日：2017-11-30

申请号：US15539928

申请日：2015-12-25

Applicant: Nitto Denko Corporation

Inventor： Hiromoto HARUTA ,  Hiroyuki TAKEMOTO ,  Daisuke HATTORI ,  Kozo NAKAMURA

IPC: B32B5/18 ,  B32B27/06 ,  B32B7/02 ,  G02B1/10 ,  B32B37/14

CPC classification number: B32B5/18 ,  B32B7/02 ,  B32B27/06 ,  B32B37/14 ,  B32B2551/00 ,  C08J7/047 ,  C08J2483/04 ,  G02B1/10

Abstract: The present invention provides a new member having a low refractive index as a substitute for an air layer, for example. The laminated film roll of the present invention includes a long laminated film roll including: an ultra-low refractive index layer having a refractive index of 1.20 or less; and a resin film, wherein the ultra-low refractive index layer is stacked on the resin film. The method of forming the long laminated film roll of the present invention includes steps of: preparing a liquid containing microporous particles; coating a resin film with the liquid; and drying the liquid applied on the resin film, for example.