Patents by Inventor Tetsuya KAMADA

Tetsuya KAMADA 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).

  • Patent number: 11929353
    Abstract: A white light emitting device includes: first light-emitting units to which a first current is applied; and second light-emitting units to which a second current which is different from the first current is applied. When the first current is applied to the first light-emitting units and the second current is applied to the second light-emitting units, an average emission chromaticity of the first light-emitting units and an average emission chromaticity of the second light-emitting units are identical colors. When the same current is applied to both the first light-emitting units and the second light-emitting units, the average emission chromaticity of the first light-emitting units and the average emission chromaticity of the second light-emitting units are non-identical colors.
    Type: Grant
    Filed: December 16, 2020
    Date of Patent: March 12, 2024
    Assignee: NUVOTON TECHNOLOGY CORPORATION JAPAN
    Inventors: Hidesato Hisanaga, Tetsuya Kamada, Shigeo Hayashi, Takashi Kuwaharada
  • Patent number: 11181245
    Abstract: A light source device includes: a substrate; a light-emitting unit matrix including a plurality of light-emitting units disposed in a matrix on the substrate; and a reflective resin disposed in a region, on the substrate, including a region where the light-emitting unit matrix is disposed. The plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit adjacent to each other in a column direction of the light-emitting unit matrix. The reflective resin includes a first reflective portion disposed between the first light-emitting unit and the second light-emitting unit and extending in a direction intersecting the column direction. At least a portion of an upper surface of the first reflective portion protrudes beyond an upper surface of the first light-emitting unit and an upper surface of the second light-emitting unit.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: November 23, 2021
    Assignee: NUVOTON TECHNOLOGY CORPORATION JAPAN
    Inventors: Ryota Yuge, Shigeo Hayashi, Tooru Aoyagi, Tetsuya Kamada
  • Publication number: 20210104501
    Abstract: A white light emitting device includes: first light-emitting units to which a first current is applied; and second light-emitting units to which a second current which is different from the first current is applied. When the first current is applied to the first light-emitting units and the second current is applied to the second light-emitting units, an average emission chromaticity of the first light-emitting units and an average emission chromaticity of the second light-emitting units are identical colors. When the same current is applied to both the first light-emitting units and the second light-emitting units, the average emission chromaticity of the first light-emitting units and the average emission chromaticity of the second light-emitting units are non-identical colors.
    Type: Application
    Filed: December 16, 2020
    Publication date: April 8, 2021
    Inventors: Hidesato HISANAGA, Tetsuya KAMADA, Shigeo HAYASHI, Takashi KUWAHARADA
  • Publication number: 20200182424
    Abstract: A light source device includes: a substrate; a light-emitting unit matrix including a plurality of light-emitting units disposed in a matrix on the substrate; and a reflective resin disposed in a region, on the substrate, including a region where the light-emitting unit matrix is disposed. The plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit adjacent to each other in a column direction of the light-emitting unit matrix. The reflective resin includes a first reflective portion disposed between the first light-emitting unit and the second light-emitting unit and extending in a direction intersecting the column direction. At least a portion of an upper surface of the first reflective portion protrudes beyond an upper surface of the first light-emitting unit and an upper surface of the second light-emitting unit.
    Type: Application
    Filed: February 13, 2020
    Publication date: June 11, 2020
    Inventors: Ryota YUGE, Shigeo HAYASHI, Tooru AOYAGI, Tetsuya KAMADA
  • Patent number: 10546988
    Abstract: A light emitting device includes a light emitting element; a sub-mount including a sub-mount substrate with a front surface on which the light emitting element is disposed, and a back surface electrode disposed in a back surface that is on a back side of the front surface of the sub-mount substrate; a main-mount in which the sub-mount is disposed, the main-mount including a front surface metal pattern including a wiring electrode bonded to the back surface electrode via solder. The front surface metal pattern has a slit, in a plan view, at a position away from a disposition region in which the sub-mount is disposed.
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: January 28, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masahiro Hayashi, Tetsuya Kamada, Takashi Kuwaharada, Kiyomi Hagihara, Toshikazu Shimokatano, Shigeo Hayashi, Hiroki Shirozono, Hideaki Usukubo
  • Publication number: 20180159006
    Abstract: A light emitting device includes a light emitting element; a sub-mount including a sub-mount substrate with a front surface on which the light emitting element is disposed, and a back surface electrode disposed in a back surface that is on a back side of the front surface of the sub-mount substrate; a main-mount in which the sub-mount is disposed, the main-mount including a front surface metal pattern including a wiring electrode bonded to the back surface electrode via solder. The front surface metal pattern has a slit, in a plan view, at a position away from a disposition region in which the sub-mount is disposed.
    Type: Application
    Filed: February 1, 2018
    Publication date: June 7, 2018
    Inventors: Masahiro HAYASHI, Tetsuya KAMADA, Takashi KUWAHARADA, Kiyomi HAGIHARA, Toshikazu SHIMOKATANO, Shigeo HAYASHI, Hiroki SHIROZONO, Hideaki USUKUBO