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.

公开(公告)号：US20210027970A1

公开(公告)日：2021-01-28

申请号：US17070785

申请日：2020-10-14

Applicant: NITTO DENKO CORPORATION

Inventor： Kozo Nakamura ,  Takahiro Yoshikawa ,  Kazuhito Hosokawa

IPC: H01J1/68 ,  G02F1/13357 ,  B32B25/08 ,  B32B27/08 ,  B32B27/28 ,  B32B27/30 ,  B32B27/36 ,  G02B5/02

Abstract: There is provided an optical member that can achieve a liquid crystal display apparatus having high brightness, an excellent hue, and a high color rendering property. An optical member according to the present invention includes, in the stated order: a first barrier layer; a first wavelength conversion layer; a second wavelength conversion layer; and a second barrier layer. The first wavelength conversion layer includes a matrix and a first wavelength conversion material dispersed in the matrix and having a predetermined center emission wavelength. The second wavelength conversion layer includes a matrix and a second wavelength conversion material dispersed in the matrix and having a center emission wavelength different from that of the first wavelength conversion material.

公开(公告)号：US20240192408A1

公开(公告)日：2024-06-13

申请号：US18285067

申请日：2021-12-28

Applicant: NITTO DENKO CORPORATION

Inventor： Ryota Morishima ,  Takahiro Yoshikawa ,  Daisuke Hattori

IPC: G02B1/14

CPC classification number: G02B1/14 ,  G02B2207/107 ,  G02B2207/109

Abstract: The present invention provides an optical laminate including a void-containing layer with high strength against peeling, a method for producing the optical laminate, an optical member including the optical laminate, an optical apparatus including the optical laminate, a method for producing the optical member, and a method for producing the optical apparatus. The optical laminate (10a) or (10b) of the present inventions includes: a void-containing layer (12); and a hard layer (13) formed on the void-containing layer (12), wherein the void-containing layer (12) has a void fraction of 30 vol % or more, the hard layer (13) includes at least one element selected from the group consisting of metal, metal oxide, silicon, silicon oxide and an organic-inorganic hybrid material, and hardness measured by pushing an indenter of a nano indenter into the hard layer (13) for 20 nm is larger than hardness of the void-containing layer (12).

公开(公告)号：US11921311B2

公开(公告)日：2024-03-05

申请号：US17913567

申请日：2021-03-26

Applicant: NITTO DENKO CORPORATION

Inventor： Takahiro Yoshikawa ,  Daisuke Hattori ,  Ryota Morishima

IPC: F21V8/00 ,  G02F1/13357

CPC classification number: G02B6/0028 ,  G02B6/0073 ,  G02F1/133615

Abstract: Provided is a lighting apparatus having high light entrance efficiency with respect to a light guide plate, and being excellent in tint of light emitted from the light guide plate. The lighting apparatus of the present invention includes: an LED package; a light guide plate, which includes a main surface serving as a light emission surface, and a side surface serving as a light entrance surface, and which is arranged so that the side surface is opposed to the LED package; and a low-refractive index layer arranged between the LED package and the light guide plate.

公开(公告)号：US20230145275A1

公开(公告)日：2023-05-11

申请号：US17913567

申请日：2021-03-26

Applicant: NITTO DENKO CORPORATION

Inventor： Takahiro Yoshikawa ,  Daisuke Hattori ,  Ryota Morishima

IPC: F21V8/00

CPC classification number: G02B6/0028 ,  G02B6/0073 ,  G02F1/133615

Abstract: Provided is a lighting apparatus having high light entrance efficiency with respect to a light guide plate, and being excellent in tint of light emitted from the light guide plate. The lighting apparatus of the present invention includes: an LED package; a light guide plate, which includes a main surface serving as a light emission surface, and a side surface serving as a light entrance surface, and which is arranged so that the side surface is opposed to the LED package; and a low-refractive index layer arranged between the LED package and the light guide plate.

公开(公告)号：US20200301207A1

公开(公告)日：2020-09-24

申请号：US16085836

申请日：2017-03-15

Applicant: NITTO DENKO CORPORATION

Inventor： Takahiro Yoshikawa ,  Kozo Nakamura ,  Kazuhito Hosokawa

IPC: G02F1/13357 ,  C09K11/02 ,  C09K11/08 ,  C09K11/70 ,  C09K11/61 ,  G02F1/1335 ,  F21V8/00

Abstract: An optical member is disclosed that can achieve a liquid crystal display apparatus having excellent durability and having a high color rendering property. An optical member according to the present invention includes, in the stated order: a first barrier layer; a wavelength conversion layer; and a second barrier layer. The wavelength conversion layer includes a matrix and a wavelength conversion material dispersed in the matrix. An emission spectrum of light to be extracted from the optical member has a peak having an intensity Gp in a wavelength band of from 515 nm to 550 nm, and a peak having an intensity Rp in a wavelength band of from 605 nm to 650 nm, and an average value Ave of intensities in a wavelength band of from 570 nm to 600 nm in the emission spectrum and an average value of Gp and Rp satisfy the following expression (1): Ave≤0.1×{(Gp+Rp)/2}  (1).

公开(公告)号：US12124071B2

公开(公告)日：2024-10-22

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：US12044880B2

公开(公告)日：2024-07-23

申请号：US17914510

申请日：2021-03-26

Applicant: NITTO DENKO CORPORATION

Inventor： Daisuke Hattori ,  Takahiro Yoshikawa ,  Ryota Morishima ,  Atsushi Kishi

IPC: F21V8/00

CPC classification number: G02B6/0088 ,  G02B6/0055

Abstract: A backlight unit includes: a light source; a light guide plate having an end surface that is arranged to face the light source, and that light from the light source enters, and an emitting surface from which the entered light is emitted; a casing having a front portion and a back portion, the casing being configured to store the light source and the light guide plate; and an optical pressure-sensitive adhesive film arranged between the front portion of the casing on a light source side and the light guide plate, the optical pressure-sensitive adhesive film being bonded to the light guide plate. The optical pressure-sensitive adhesive film includes a light-absorbing layer, a substrate, a low-refractive index layer, and a pressure-sensitive adhesive layer in the stated order from a front portion side of the casing.

公开(公告)号：US20230152509A1

公开(公告)日：2023-05-18

申请号：US17914043

申请日：2021-03-25

Applicant: NITTO DENKO CORPORATION

Inventor： Takahiro Yoshikawa ,  Daisuke Hattori ,  Ryota Morishima ,  Atsushi Kishi

IPC: F21V8/00

CPC classification number: G02B6/0055

Abstract: Provided is an optical member, which is suppressed from causing a reduction in display quality due to wear or a flaw resulting from its vibration while maintaining the excellent characteristics of its low-refractive index layer. The optical member includes: a light guide plate having an end surface that light from a light source enters and an emitting surface from which the entered light is emitted; and a reflective plate bonded to a side of the light guide plate opposite to the emitting surface via a double-sided pressure-sensitive adhesive film. The double-sided pressure-sensitive adhesive film includes a first pressure-sensitive adhesive layer, a low-refractive index layer, and a second pressure-sensitive adhesive layer from the light guide plate side. The optical member further includes a surface-treated layer formed on a side of the reflective plate opposite to the double-sided pressure-sensitive adhesive film.

公开(公告)号：US20230129382A1

公开(公告)日：2023-04-27

申请号：US17914510

申请日：2021-03-26

Applicant: NITTO DENKO CORPORATION

Inventor： Daisuke Hattori ,  Takahiro Yoshikawa ,  Ryota Morishima ,  Atsushi Kishi

IPC: F21V8/00

Abstract: A backlight unit includes: a light source; a light guide plate having an end surface that is arranged to face the light source, and that light from the light source enters, and an emitting surface from which the entered light is emitted; a casing having a front portion and a back portion, the casing being configured to store the light source and the light guide plate; and an optical pressure-sensitive adhesive film arranged between the front portion of the casing on a light source side and the light guide plate, the optical pressure-sensitive adhesive film being bonded to the light guide plate. The optical pressure-sensitive adhesive film includes a light-absorbing layer, a substrate, a low-refractive index layer, and a pressure-sensitive adhesive layer in the stated order from a front portion side of the casing.