公开(公告)号：US20240272343A1

公开(公告)日：2024-08-15

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

CPC classification number: G02B6/0016 ,  G02B1/11 ,  G02B6/0018 ,  G02B6/003 ,  G02B6/0073

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.

公开(公告)号：US20230110868A1

公开(公告)日：2023-04-13

申请号：US17800732

申请日：2021-02-19

Applicant: NITTO DENKO CORPORATION

Inventor： Mizuho MIZUNO ,  Akiko TANAKA ,  Kozo NAKAMURA

IPC: C09J133/10 ,  C09J7/20

Abstract: An adhesive composition layer is made from an adhesive composition that includes: a polymer including a copolymer of at least one (meth)acrylate monomer and at least one copolymerizable functional group-containing monomer selected from the group consisting of hydroxyl group-containing copolymerizable monomers, carboxyl group-containing copolymerizable monomers, and nitrogen-containing vinyl monomers; and a curable resin. The adhesive composition layer has a 23° C. initial tensile modulus of elasticity of 0.35 MPa or more and yet 8.00 MPa or less before curing the curable resin in the adhesive composition, and a 23° C. initial tensile modulus of elasticity of 1.00 MPa or more after curing the curable resin in the adhesive composition.

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：US20240230978A1

公开(公告)日：2024-07-11

申请号：US18288433

申请日：2022-06-16

Applicant: NITTO DENKO CORPORATION

Inventor： Yufeng WENG ,  Kozo NAKAMURA ,  Takahiro YOSHIKAWA

IPC: F21V8/00

CPC classification number: G02B6/006 ,  G02B6/0035

Abstract: A lightguide component for light emission devices has a first principal face and a second principal face at an opposite side from the first principal face. The lightguide component for light emission devices includes: a lightguide layer including a light-receiving portion to receive light emitted from a light source, a third principal face at the first principal face side, and a fourth principal face at the second principal face side; and a light distribution controlling structure having a plurality of internal spaces, the plurality of internal spaces creating interfaces to direct a portion of the light propagating in the lightguide layer toward the first principal face via total internal reflection. In a plan view a first region in which the light distribution controlling structure is present and a second region in which the light distribution controlling structure is not present are disposed so as to define a predetermined design.

公开(公告)号：US20240061157A1

公开(公告)日：2024-02-22

申请号：US18270045

申请日：2022-02-04

Applicant: NITTO DENKO CORPORATION

Inventor： Akiko TANAKA ,  Mizuho MIZUNO ,  Kozo NAKAMURA ,  Yufeng WENG

IPC: G02B5/02 ,  C09J11/06 ,  C09J133/14 ,  C09J133/08 ,  C09J167/00

CPC classification number: G02B5/0231 ,  G02B5/0268 ,  C09J11/06 ,  C09J133/14 ,  C09J133/08 ,  C09J167/00 ,  C09J2301/312

Abstract: An optical stack includes: a first optical sheet having a first principal face with a concavo-convex structure and a second principal face at an opposite side from the first principal face; and an adhesive layer that is disposed on the first principal face of the first optical sheet. The concavo-convex structure includes a plurality of dents and flat portions between adjacent ones of the plurality of dents. A surface of the adhesive layer and the first principal face of the first optical sheet together define an internal space within each of the plurality of dents. Each of the plurality of dents satisfies 0.10≤(C−A)/C 1.00 and 0.75≤(C−A)/(C−B), where A is a maximum height value of the adhesive layer existing in that dent; B is a minimum height value of the adhesive layer existing in that dent; and C is a depth of that dent.

公开(公告)号：US20230296823A1

公开(公告)日：2023-09-21

申请号：US18019298

申请日：2021-08-04

Applicant: NITTO DENKO CORPORATION

Inventor： Kozo NAKAMURA ,  Minoru MIYATAKE ,  Yufeng WENG ,  Kari RINKO ,  Shingo MATSUMOTO

IPC: F21V8/00

CPC classification number: G02B6/0055 ,  G02B6/0016 ,  G02B6/002 ,  G02B6/0073 ,  G02B6/0068 ,  G02B6/0026 ,  G02B6/0065 ,  G02B6/0088

Abstract: An optical incoupling tape (50) attachable on a lightguide (20) is provided, comprising a substrate (50A) and at least one pattern (51) formed with a number of periodic pattern features (52) embedded in the substrate (50A) and configured as optically functional cavities (52) filled with a material having a refractive index different from the refractive index of the material of the substrate (50A) surrounding the cavity (52). The pattern (51) is configured to incouple light incident thereto and to adjust direction of the incoupled light such, that the incoupled light acquires a propagation path through a lightguide medium (20) via a series of total internal reflections. A method for manufacturing the tape (50), related uses and an optical apparatus comprising the tape (50) integrated with a light emitter device (22) are further provided.

公开(公告)号：US20230288624A1

公开(公告)日：2023-09-14

申请号：US18019284

申请日：2021-08-04

Applicant: NITTO DENKO CORPORATION

Inventor： Kozo NAKAMURA ,  Minoru MIYATAKE ,  Yufeng WENG ,  Kari RINKO ,  Shingo MATSUMOTO

IPC: F21V8/00

CPC classification number: G02B6/0023 ,  G02B6/0065

Abstract: An optical deflection tape (10) attachable on a lightguide (20) is provided, comprising a substrate (10A) and at least one pattern (11) formed with a number of periodic pattern features (12) embedded in the substrate (10A) and configured as optically functional cavities (12) filled with a material having a refractive index different from the refractive index of the material of the substrate (10A) surrounding the cavity (12). The pattern (11) is configured to adjust direction of light received thereto such, that light incident at the pattern (11) is deflected to acquire a propagation path through a lightguide medium (20) via a series of total internal reflections and, by virtue of said at least one pattern (11), the optical deflection tape (10) is configured to control distribution of light propagating through the lightguide (20). A method for manufacturing the tape (10) and related uses are further provided.

公开(公告)号：US20230280523A1

公开(公告)日：2023-09-07

申请号：US18017695

申请日：2021-07-27

Applicant: NITTO DENKO CORPORATION

Inventor： Kozo NAKAMURA ,  Yufeng WENG ,  Takahiro YOSHIKAWA

IPC: F21V8/00 ,  G02B1/18 ,  F21V33/00 ,  G02B1/11 ,  G02B1/14

CPC classification number: G02B6/0053 ,  G02B1/18 ,  G02B6/0073 ,  F21V33/006 ,  G02B1/11 ,  G02B1/14 ,  F21Y2115/10

Abstract: A lightguide component for illumination devices includes: a lightguide layer having a first principal face, a second principal face at an opposite side from the first principal face, and a light-receiving side face to receive light emitted from a light source; a first low-refractive index layer (20A) that is disposed at the first principal face side of the lightguide layer, the first low-refractive index layer having a refractive index nL1 which is smaller than a refractive index nGP of the lightguide layer; and a light distribution controlling structure (14A, 14B) capable of at least directing a portion of light propagating in the lightguide layer toward the first low-refractive index layer or in an opposite direction from the first low-refractive index layer. The lightguide component has a visible light transmittance of 60% or more, and a haze value of less than 10%.

公开(公告)号：US20160054485A1

公开(公告)日：2016-02-25

申请号：US14783712

申请日：2013-04-10

Applicant: NITTO DENKO CORPORATION

Inventor： Kozo NAKAMURA ,  Hiroyuki TAKEMOTO

IPC: G02B5/02

CPC classification number: G02B5/0242 ,  G02B5/0268 ,  G02B5/0278

Abstract: An object of the present invention is to provide a light diffusing element having a high haze value, strong diffusibility, a smooth surface, and suppressed backscattering. The light diffusing element of the present invention includes: a matrix including a resin component and ultrafine particle components; and light diffusing fine particles dispersed in the matrix, in which part of the resin component permeates the light diffusing fine particles, and a permeation range of the resin component in the light diffusing fine particles is 90% or more with respect to an average particle diameter of the light diffusing fine particles in the light diffusing element, and in which the light diffusing element has an arithmetic average surface roughness Ra of 0.04 μm or less.

Abstract translation: 本发明的目的是提供一种具有高雾度值，强扩散性，光滑表面和抑制后向散射的光漫射元件。 本发明的光漫射元件包括：包含树脂成分和超微粒成分的基体; 以及分散在基质中的微粒，其中树脂成分的一部分透过光扩散性微粒，并且光漫射微粒中的树脂成分的透过范围相对于平均粒径为90％以上 的光漫射元件中的光漫射微粒，其中光漫射元件的算术平均表面粗糙度Ra为0.04μm以下。

公开(公告)号：US20240124755A1

公开(公告)日：2024-04-18

申请号：US18277410

申请日：2022-02-04

Applicant: NITTO DENKO CORPORATION

Inventor： Taishi OGAWA ,  Akiko TANAKA ,  Mizuho MIZUNO ,  Kozo NAKAMURA

IPC: C09J167/02 ,  C09J7/35 ,  G02B5/04

CPC classification number: C09J167/02 ,  C09J7/35 ,  G02B5/045 ,  C09J2301/122 ,  C09J2467/00

Abstract: An adhesive layer is formed by cross-linking an adhesive composition containing: a polyester resin that is a copolymer of a polycarboxylic acid and a polyalcohol; a cross-linking agent; and at least one cross-linking catalyst selected from the group consisting of an organic zirconium compound, an organic iron compound, and an organic aluminum compound, the adhesive layer having a gel fraction of 40% or more after being retained at a temperature of 85° C. and a relative humidity of 85% for 300 hours, and having a 180° peel adhesive strength of 100 mN/20 mm or more with respect to a PMMA film.