Patents by Inventor Yusaku ACHI
Yusaku ACHI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11757063Abstract: A method for manufacturing a linear light source includes: providing a base having a first surface defining recesses in an array in a first direction, and a second surface having a curved contour in a cross section orthogonal to the first direction and a straight contour in a cross section parallel to the first direction; providing light sources each having a top surface and a bottom surface including electrodes; placing the light sources at positions overlapping the recesses in a plan view with the top surface of the light source facing a bottom surface of the recess; placing a first reflective member to cover the light sources and the first surface so that the electrodes of the light sources are exposed; placing a second reflective member on the second surface; and cutting the base along the first direction to define a third surface continuous with the first and second surfaces.Type: GrantFiled: December 21, 2020Date of Patent: September 12, 2023Assignee: NICHIA CORPORATIONInventor: Yusaku Achi
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Patent number: 11581460Abstract: A method for manufacturing a light emitting module includes: providing a light source including a first surface having a pair of electrodes, and a second surface; providing a light guide plate including a first main surface and a second main surface, the light guide plate defining a through-hole extending through the light guide plate from the first main surface to the second main surface, the through-hole having a first penetration portion disposed on a first main surface side, a second penetration portion disposed on a second main surface side, and an intermediate penetration portion connecting the first penetration portion and the second penetration portion, the intermediate penetration portion being narrower in width than the second surface of the light source; and disposing the light source in the second penetration portion of the light guide plate with a joining member being interposed between the light source and the light guide plate.Type: GrantFiled: December 23, 2020Date of Patent: February 14, 2023Assignee: NICHIA CORPORATIONInventor: Yusaku Achi
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Patent number: 11508881Abstract: A light emitting module includes: a plurality of light emitting elements each having a primary light emitting surface and a lateral surface; a plurality of wavelength conversion members arranged respectively on the primary light emitting surfaces of the plurality of light emitting elements; and a lightguide plate having a first primary surface and a second primary surface and arranged continuously on the plurality of wavelength conversion members so that the second primary surface faces the plurality of wavelength conversion members, wherein the lightguide plate includes a plurality of recessed portions located on the second primary surface, and a lateral surface of at least one of the plurality of wavelength conversion members is partially in contact with an inner lateral surface of at least one of the plurality of recessed portions.Type: GrantFiled: March 8, 2021Date of Patent: November 22, 2022Assignee: NICHIA CORPORATIONInventors: Mamoru Imada, Toshiaki Moriwaki, Yusaku Achi, Ryohei Yamashita
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Patent number: 11493803Abstract: A display device includes a light-emitting module and a light-diffusing sheet stacked body. The light-emitting module includes at least one light guide plate including an upper surface and a lower surface, and light sources disposed at the lower surface side of the light guide plate. The light-diffusing sheet stacked body includes a first light-diffusing sheet disposed on the light guide plate, a second light-diffusing sheet disposed on the first light-diffusing sheet, and a third light-diffusing sheet disposed on the second light-diffusing sheet. The first light-diffusing sheet includes first protrusions at an upper surface side thereof. The second light-diffusing sheet includes second protrusions at an upper surface side thereof. The third light-diffusing sheet includes third protrusions at an upper surface side thereof. A shape of the third protrusion may be different from a shape of the first protrusions and/or a shape of the second protrusions.Type: GrantFiled: June 25, 2021Date of Patent: November 8, 2022Assignees: NICHIA CORPORATION, KEIWA Inc.Inventors: Ryohei Yamashita, Yusaku Achi, Chengheng Tsai
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Publication number: 20220293833Abstract: A light emitting module includes a light guiding plate being light-transmissive and having a first main surface being as a light exiting surface and a second main surface positioned opposite to the first main surface; a light emitting element disposed at the second main surface and configured to emit light toward the light guiding plate; an optical function part being greater in size than a light emitting surface of the light emitting element, the optical function part being disposed in the first main surface so as to correspond to an optical axis of the light emitting element; and a light-cutting scattering layer disposed on a first main surface side of the light guiding plate so as to correspond to the optical axis of the light emitting element. The light-cutting scattering layer covers the optical function part as seen in a plan view.Type: ApplicationFiled: June 1, 2022Publication date: September 15, 2022Applicant: NICHIA CORPORATIONInventors: Yusaku ACHI, Ryohei YAMASHITA
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Patent number: 11380826Abstract: A light emitting module includes a light guiding plate being light-transmissive and having a first main surface being as a light exiting surface and a second main surface positioned opposite to the first main surface; a light emitting element disposed at the second main surface and configured to emit light toward the light guiding plate; an optical function part being greater in size than a light emitting surface of the light emitting element, the optical function part being disposed in the first main surface so as to correspond to an optical axis of the light emitting element; and a light-cutting scattering layer disposed on a first main surface side of the light guiding plate so as to correspond to the optical axis of the light emitting element. The light-cutting scattering layer covers the optical function part as seen in a plan view.Type: GrantFiled: November 27, 2019Date of Patent: July 5, 2022Assignee: NICHIA CORPORATIONInventors: Yusaku Achi, Ryohei Yamashita
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Patent number: 11329201Abstract: A light-emitting device includes: a substrate; and at least one light source comprising: a light-emitting element comprising a plurality of electrodes that face the substrate, and a resin member covering at least portions of lateral surfaces of the light-emitting element and not covering an upper surface of the light-emitting element, wherein, in a directivity diagram of the light source, a variation in light output of the light source in a range of ?40° to 40° is 15% or less.Type: GrantFiled: December 5, 2017Date of Patent: May 10, 2022Assignee: NICHIA CORPORATIONInventors: Ryohei Yamashita, Yusaku Achi
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Patent number: 11221519Abstract: Provided is a method of manufacturing a light emitting module, the method including: providing a light guiding plate having a first main surface serving as a lighting surface, and a second main surface opposite to the first main surface, the second main surface defining a recess thereon, preparing a light emitting element unit by attaching a wavelength conversion portion to a light emitting element having electrodes and a light emitting surface; providing a light diffusion portion at a bottom of the recess; depositing the light emitting element unit onto the light diffusion portion in the recess; and forming a terminal having an electrical conductivity on the electrodes of the light emitting element.Type: GrantFiled: August 10, 2020Date of Patent: January 11, 2022Assignee: NICHIA CORPORATIONInventors: Mamoru Imada, Toshiaki Moriwaki, Yusaku Achi
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Publication number: 20210405451Abstract: A display device includes a light-emitting module and a light-diffusing sheet stacked body. The light-emitting module includes at least one light guide plate including an upper surface and a lower surface, and light sources disposed at the lower surface side of the light guide plate. The light-diffusing sheet stacked body includes a first light-diffusing sheet disposed on the light guide plate, a second light-diffusing sheet disposed on the first light-diffusing sheet, and a third light-diffusing sheet disposed on the second light-diffusing sheet. The first light-diffusing sheet includes first protrusions at an upper surface side thereof. The second light-diffusing sheet includes second protrusions at an upper surface side thereof. The third light-diffusing sheet includes third protrusions at an upper surface side thereof. A shape of the third protrusion may be different from a shape of the first protrusions and/or a shape of the second protrusions.Type: ApplicationFiled: June 25, 2021Publication date: December 30, 2021Applicants: NICHIA CORPORATION, KEIWA Inc.Inventors: Ryohei YAMASHITA, Yusaku ACHI, Chengheng TSAI
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Patent number: 11143808Abstract: A light emitting module have a translucent light guide plate, which has a first primary surface that emits light and an opposite second primary surface, and a plurality of light sources disposed at given intervals on the second primary surface of the light guide plate. The light guide plate is made up of a plurality of light emitting cell regions with a light source disposed in the center section of each of the plurality of light emitting cell regions, an optically functional area is established on the first primary surface in each of the plurality of light emitting cell regions, and each light source is disposed on the second primary surface in a position opposite the corresponding optically functional area. The second primary surface has reflecting depressions at the boundaries between adjacent light-emitting cell regions, and the first primary surface has reflecting grooves positioned away from the center of each cell near the cell boundary.Type: GrantFiled: December 28, 2019Date of Patent: October 12, 2021Assignee: NICHIA CORPORATIONInventors: Yusaku Achi, Toshiaki Moriwaki
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Patent number: 11143807Abstract: A method of manufacturing a light emitting module according to the present disclosure includes: preparing a light guide plate that comprises a first main surface serving as a light-emitting surface and a second main surface opposite to the first main surface; respectively providing light emitting elements on the second main surface so as to correspond to each of a plurality of optically functional portions provided on the first main surface of the light guide plate; and forming wires electrically connecting the plurality of light emitting elements.Type: GrantFiled: July 29, 2020Date of Patent: October 12, 2021Assignee: NICHIA CORPORATIONInventors: Tadao Hayashi, Ryohei Yamashita, Yusaku Achi, Mamoru Imada
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Patent number: 11106077Abstract: A light emitting module includes: a plurality of light emitting elements each having a primary light emitting surface; a plurality of wavelength conversion members arranged respectively on the primary light emitting surfaces of the plurality of light emitting elements; a resin member arranged between the plurality of wavelength conversion members and covering lateral surfaces of the plurality of wavelength conversion members; and a lightguide plate having a first primary surface and a second primary surface, and arranged on the resin member and the plurality of wavelength conversion members so that the second primary surface faces the resin member and the plurality of wavelength conversion members, wherein the lightguide plate includes a plurality of recessed portions on the second primary surface that are located over the plurality of wavelength conversion members.Type: GrantFiled: August 1, 2019Date of Patent: August 31, 2021Assignee: NICHIA CORPORATIONInventors: Mamoru Imada, Toshiaki Moriwaki, Yusaku Achi, Ryohei Yamashita
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Patent number: 11092731Abstract: A light emitting module and a planar light source reduced in thickness are provided. A light emitting module includes: a light guide plate including a first main surface serving as a light emitting surface, a second main surface provided on a side opposite to the first main surface, and a recess provided at the second main surface; a first fluorescent material layer provided in the recess; a light emitting element provided at the first fluorescent material layer on the second main surface side; and a second fluorescent material layer provided at the second main surface.Type: GrantFiled: July 28, 2020Date of Patent: August 17, 2021Assignee: NICHIA CORPORATIONInventors: Mamoru Imada, Yusaku Achi
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Publication number: 20210202805Abstract: A method for manufacturing a light emitting module includes: providing a light source including a first surface having a pair of electrodes, and a second surface; providing a light guide plate including a first main surface and a second main surface, the light guide plate defining a through-hole extending through the light guide plate from the first main surface to the second main surface, the through-hole having a first penetration portion disposed on a first main surface side, a second penetration portion disposed on a second main surface side, and an intermediate penetration portion connecting the first penetration portion and the second penetration portion, the intermediate penetration portion being narrower in width than the second surface of the light source; and disposing the light source in the second penetration portion of the light guide plate with a joining member being interposed between the light source and the light guide plate.Type: ApplicationFiled: December 23, 2020Publication date: July 1, 2021Inventor: Yusaku ACHI
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Publication number: 20210202792Abstract: A method for manufacturing a linear light source includes: providing a base having a first surface defining recesses in an array in a first direction, and a second surface having a curved contour in a cross section orthogonal to the first direction and a straight contour in a cross section parallel to the first direction; providing light sources each having a top surface and a bottom surface including electrodes; placing the light sources at positions overlapping the recesses in a plan view with the top surface of the light source facing a bottom surface of the recess; placing a first reflective member to cover the light sources and the first surface so that the electrodes of the light sources are exposed; placing a second reflective member on the second surface; and cutting the base along the first direction to define a third surface continuous with the first and second surfaces.Type: ApplicationFiled: December 21, 2020Publication date: July 1, 2021Inventor: Yusaku ACHI
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Publication number: 20210193881Abstract: A light emitting module includes: a plurality of light emitting elements each having a primary light emitting surface and a lateral surface; a plurality of wavelength conversion members arranged respectively on the primary light emitting surfaces of the plurality of light emitting elements; and a lightguide plate having a first primary surface and a second primary surface and arranged continuously on the plurality of wavelength conversion members so that the second primary surface faces the plurality of wavelength conversion members, wherein the lightguide plate includes a plurality of recessed portions located on the second primary surface, and a lateral surface of at least one of the plurality of wavelength conversion members is partially in contact with an inner lateral surface of at least one of the plurality of recessed portions.Type: ApplicationFiled: March 8, 2021Publication date: June 24, 2021Applicant: NICHIA CORPORATIONInventors: Mamoru IMADA, Toshiaki MORIWAKI, Yusaku ACHI, Ryohei YAMASHITA
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Patent number: 11035994Abstract: A light-emitting module includes: a light guide plate having a first surface on which a plurality of first recesses arranged in rows and columns and a grid-shaped groove portion surrounding each of the plurality of first recesses are provided, and a second surface located on the opposite side from the first surface; a plurality of light-emitting elements each disposed inside a corresponding one of the plurality of first recesses; a first light transmission member disposed inside the groove portion of the light guide plate, and having a refractive index lower than a refractive index of the light guide plate; and a reflective resin layer covering the first surface of the light guide plate and the first light transmission member.Type: GrantFiled: December 24, 2019Date of Patent: June 15, 2021Assignee: NICHIA CORPORATIONInventors: Yusaku Achi, Toshiaki Moriwaki, Ryohei Yamashita
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Patent number: 10971657Abstract: A light emitting module includes: a plurality of light emitting elements each having a primary light emitting surface and a lateral surface; a plurality of wavelength conversion members arranged respectively on the primary light emitting surfaces of the plurality of light emitting elements; and a lightguide plate having a first primary surface and a second primary surface and arranged continuously on the plurality of wavelength conversion members so that the second primary surface faces the plurality of wavelength conversion members, wherein the lightguide plate includes a plurality of recessed portions located on the second primary surface, and a lateral surface of at least one of the plurality of wavelength conversion members is partially in contact with an inner lateral surface of at least one of the plurality of recessed portions.Type: GrantFiled: August 1, 2019Date of Patent: April 6, 2021Assignee: NICHIA CORPORATIONInventors: Mamoru Imada, Toshiaki Moriwaki, Yusaku Achi, Ryohei Yamashita
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Publication number: 20200371398Abstract: Provided is a method of manufacturing a light emitting module, the method including: providing a light guiding plate having a first main surface serving as a lighting surface, and a second main surface opposite to the first main surface, the second main surface defining a recess thereon, preparing a light emitting element unit by attaching a wavelength conversion portion to a light emitting element having electrodes and a light emitting surface; providing a light diffusion portion at a bottom of the recess; depositing the light emitting element unit onto the light diffusion portion in the recess; and forming a terminal having an electrical conductivity on the electrodes of the light emitting element.Type: ApplicationFiled: August 10, 2020Publication date: November 26, 2020Applicant: NICHIA CORPORATIONInventors: Mamoru IMADA, Toshiaki MORIWAKI, Yusaku ACHI
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Publication number: 20200355863Abstract: A light emitting module and a planar light source reduced in thickness are provided. A light emitting module includes: a light guide plate including a first main surface serving as a light emitting surface, a second main surface provided on a side opposite to the first main surface, and a recess provided at the second main surface; a first fluorescent material layer provided in the recess; a light emitting element provided at the first fluorescent material layer on the second main surface side; and a second fluorescent material layer provided at the second main surface.Type: ApplicationFiled: July 28, 2020Publication date: November 12, 2020Applicant: NICHIA CORPORATIONInventors: Mamoru IMADA, Yusaku ACHI