公开(公告)号：US20240200182A1

公开(公告)日：2024-06-20

申请号：US18285069

申请日：2021-12-28

Applicant: NITTO DENKO CORPORATION

Inventor： Ryota Morishima ,  Daisuke Hattori ,  Takahiro Yoshikawa

IPC: C23C14/14 ,  C08J9/36 ,  C08K3/02 ,  C08K3/10 ,  C08K3/22 ,  C09J7/38 ,  C23C16/24

CPC classification number: C23C14/14 ,  C08J9/365 ,  C08K3/02 ,  C08K3/10 ,  C08K3/22 ,  C09J7/385 ,  C23C16/24 ,  C08J2383/04 ,  C08K2003/2296 ,  C09J2203/318 ,  C09J2433/00 ,  C09J2483/00

Abstract: The present invention provides an optical laminate including a void-containing layer in which a pressure-sensitive adhesive, an adhesive, and the like barely permeate a void. In order to achieve the object, an optical laminate (10a) or (10b) of the present invention includes a void-containing layer (12) and a low moisture permeable layer (13) formed on the void-containing layer (12), wherein the low moisture permeable 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 a moisture vapor transmission rate of the low moisture permeable layer (13) measured by a dish method defined in JIS Z 0208-1976 is 35 g/m2·day or less.

公开(公告)号：US20230312991A1

公开(公告)日：2023-10-05

申请号：US17912610

申请日：2021-03-23

Applicant: NITTO DENKO CORPORATION

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

IPC: C09J7/38 ,  G02B1/14

CPC classification number: C09J7/385 ,  G02B1/14 ,  C09J2301/124 ,  C09J2301/312

Abstract: An optical laminate includes: a low-refractive index layer; a first pressure-sensitive adhesive layer arranged adjacent to the low-refractive index layer; and a second pressure-sensitive adhesive layer serving as one outermost layer. The low-refractive index layer has a porosity of 40 vol % or more; the first pressure-sensitive adhesive layer has a storage modulus of elasticity at 23° C. of from 1.0×105 (Pa) to 1.0×107 (Pa); the second pressure-sensitive adhesive layer has a storage modulus of elasticity at 23° C. of 1.0×105 (Pa) or less; a ratio of a thickness of the low-refractive index layer to a total thickness of the pressure-sensitive adhesive layers present in the optical laminate with pressure-sensitive adhesive layers on both surfaces is from 0.10% to 5.00%; and, when the second pressure-sensitive adhesive layer is arranged outside the first pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer is free from being arranged adjacent to the first pressure-sensitive adhesive layer.

公开(公告)号：US20200223175A1

公开(公告)日：2020-07-16

申请号：US16832563

申请日：2020-03-27

Applicant: NITTO DENKO CORPORATION

Inventor： Daisuke Hattori ,  Ryota Morishima ,  Atsushi Kishi ,  Akiko Sugino

IPC: B32B5/18 ,  B32B7/12 ,  B32B27/06 ,  C09J7/26 ,  C09J7/38

Abstract: The present invention provides a laminate of a void-containing layer and a pressure-sensitive adhesive/adhesive layer that achieves both a pressure-sensitive adhesive force or an adhesive force and a reduction of a tendency of a pressure-sensitive adhesive or an adhesive to penetrate into voids. The first laminate of the present invention includes: a void-containing layer (20); and a pressure-sensitive adhesive/adhesive layer (30), wherein the pressure-sensitive adhesive/adhesive layer (30) is directly laminated on one or both sides of the void-containing layer (20), the void-containing layer (20) has a void fraction of 35 vol % or more, and, after a heat/humidification durability test of holding at a temperature of 85° C. and a relative humidity of 85% for 500 hours, a void remaining ratio of the void-containing layer (20) is 50 vol % or more before the heat/humidification durability test.

公开(公告)号：US11994709B2

公开(公告)日：2024-05-28

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：US11966075B2

公开(公告)日：2024-04-23

申请号：US17914397

申请日：2021-03-26

Applicant: NITTO DENKO CORPORATION

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

IPC: F21V8/00 ,  G02F1/13357

CPC classification number: G02B6/0088 ,  G02B6/0055 ,  G02F1/133615 ,  G02F2202/28

Abstract: There is provided an optical member that can achieve a backlight unit excellent in brightness uniformity. The optical member includes: a light guide plate having an end surface that light from a light source enters, an emitting surface from which the entered light is emitted, and a light extraction pattern arranged on a surface opposite to the emitting surface; and a reflective plate bonded to the light guide plate via a double-sided pressure-sensitive adhesive film. An outer edge of the light guide plate is positioned outside an outer edge of the double-sided pressure-sensitive adhesive film, and the outer edge of the double-sided pressure-sensitive adhesive film is positioned outside an outer edge of the light extraction pattern.

公开(公告)号：US20230110580A1

公开(公告)日：2023-04-13

申请号：US17914397

申请日：2021-03-26

Applicant: NITTO DENKO CORPORATION

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

IPC: F21V8/00

Abstract: There is provided an optical member that can achieve a backlight unit excellent in brightness uniformity. The optical member includes: a light guide plate having an end surface that light from a light source enters, an emitting surface from which the entered light is emitted, and a light extraction pattern arranged on a surface opposite to the emitting surface; and a reflective plate bonded to the light guide plate via a double-sided pressure-sensitive adhesive film. An outer edge of the light guide plate is positioned outside an outer edge of the double-sided pressure-sensitive adhesive film, and the outer edge of the double-sided pressure-sensitive adhesive film is positioned outside an outer edge of the light extraction pattern.

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：US11891549B2

公开(公告)日：2024-02-06

申请号：US17276962

申请日：2019-09-26

Applicant: NITTO DENKO CORPORATION

Inventor： Daisuke Hattori ,  Atsushi Kishi ,  Ryota Morishima

IPC: C09J7/29 ,  C09J7/38 ,  G02B1/11 ,  G02B1/14

CPC classification number: C09J7/29 ,  C09J7/385 ,  G02B1/11 ,  C09J2301/124 ,  G02B1/14 ,  G02B2207/107 ,  Y10T428/249982 ,  Y10T428/2848

Abstract: There is provided an optical laminate with pressure-sensitive adhesive layers on both surfaces, which is suppressed damage from occurring to a low-refractive index layer in vacuum lamination while maintaining excellent characteristics of the low-refractive index layer. An optical laminate with pressure-sensitive adhesive layers on both surfaces according to an embodiment of the present invention comprises: a substrate; a low-retractive index layer formed on the substrate; a first pressure-sensitive adhesive layer arranged so as to be adjacent to the low-refractive index layer; and a second pressure-sensitive adhesive layer serving as one outermost layer. The low-refractive index layer has a porosity of 50% or more, the first pressure-sensitive adhesive layer has a storage modulus of elasticity of from 1.3×105 (Pa) to 1.0×107 (Pa), and the second pressure-sensitive adhesive layer has a storage modulus of elasticity of 1.0×105 (Pa) or less.

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.