Patents by Inventor Hirohisa Tanaka

Hirohisa Tanaka 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).

  • Publication number: 20240360360
    Abstract: A quantum dot includes a core including Zn and Se, and a shell composed of ZnS and provided on a surface of the core, adjacently to the core. The quantum dot-emits blue light, is Cd free, and has a particle diameter within a range from 3 nm to 20 nm and a fluorescence lifetime in a thin film state of 50 ns or less.
    Type: Application
    Filed: January 28, 2021
    Publication date: October 31, 2024
    Inventors: Masaki YAMAMOTO, Kazuki GOTO, HIROHISA YAMADA, MASAYA UEDA, Yuko OGURA, Masanori TANAKA, Mikihiro TAKASAKI, Yuka TAKAMIZUMA, Soichiro NIKATA, Tetsuji ITO, Mayuko WATANABE
  • Publication number: 20240215449
    Abstract: A power-generating method of generating power from a power-generating element. An electric polarization state in the power-generating element is changed by phase transition. First, an electric field is applied to the power-generating element to change a phase transition temperature of the power-generating element by an electric-field application unit for applying the electric field to the power-generating element without changing a temperature of the power-generating element. Then, the electric polarization state in the power-generating element is changed by application of the electric field and control of the application, so that the power from the power-generating element is generated.
    Type: Application
    Filed: April 6, 2022
    Publication date: June 27, 2024
    Applicant: KWANSEI GAKUIN EDUCATIONAL FOUNDATION
    Inventors: Hirohisa TANAKA, Yuki HARAYAMA, Tomomi NAGATANI, Shoma YAMAGUCHI, Takumi ICHIKAWA
  • Patent number: 11676839
    Abstract: A method for making an adsorption device includes: providing and etching a substrate to form a plurality of receiving grooves spaced apart from each other; forming a magnetic film in each of the plurality of receiving grooves; and forming a magnet in each of the plurality of receiving grooves. Each receiving groove includes a bottom wall and a side wall coupling the bottom wall. The magnetic film covers the bottom wall and the side wall of each of receiving groove.
    Type: Grant
    Filed: August 31, 2021
    Date of Patent: June 13, 2023
    Assignee: Century Technology (Shenzhen) Corporation Limited
    Inventors: Po-Liang Chen, Yung-Fu Lin, Hirohisa Tanaka, Yasunori Shimada
  • Patent number: 11676840
    Abstract: A transferring method includes providing an adsorption device, using the adsorption device to attract and hold a plurality of light emitting diodes (LEDs), providing a target substrate with a plurality of spots of anisotropic conductive adhesive on a surface of the target substrate; moving the adsorption device or the target substrate wherein each of the plurality of LEDs adsorbed by the adsorption device becomes in contact with one of the plurality of spots of anisotropic conductive adhesive; and curing the plurality of spots of anisotropic conductive adhesive on the target substrate and moving away the adsorption device.
    Type: Grant
    Filed: February 21, 2022
    Date of Patent: June 13, 2023
    Assignee: Century Technology (Shenzhen) Corporation Limited
    Inventors: Po-Liang Chen, Yung-Fu Lin, Hirohisa Tanaka, Yasunori Shimada
  • Patent number: 11521878
    Abstract: An adsorption device includes a substrate and a magnetic film on a surface of the substrate. The substrate has magnetic properties and is capable of generating magnetic field. The magnetic film partially covers the surface. The magnetic film generates a magnetic field having a direction that is opposite to a direction of the magnetic field generated by the substrate. Portions of the surface of the substrate not covered by the magnetic film form positions to attract and adsorb target objects, and other portion of the surface of the substrate covered by the magnetic film is not able to attract any target object.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: December 6, 2022
    Assignee: Century Technology (Shenzhen) Corporation Limited
    Inventors: Po-Liang Chen, Yung-Fu Lin, Hirohisa Tanaka, Yasunori Shimada
  • Patent number: 11498779
    Abstract: A device to attract and hold microscopic items such as micro LEDs magnetically rather than by static electricity includes a substrate and a plurality of magnetic units on a surface of the substrate. The magnetic units are spaced apart from each other and are constrained in the size and direction of their individual magnetic fields. Each of the magnetic units includes a magnet and a cladding layer partially covering the magnet. The cladding layer is made of a magnetic material. A side of the magnet away from the substrate is exposed from the cladding layer to attract and hold one micro LED.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: November 15, 2022
    Assignee: Century Technology (Shenzhen) Corporation Limited
    Inventors: Po-Liang Chen, Yung-Fu Lin, Hirohisa Tanaka, Yasunori Shimada
  • Publication number: 20220172970
    Abstract: A transferring method includes providing an adsorption device, using the adsorption device to attract and hold a plurality of light emitting diodes (LEDs), providing a target substrate with a plurality of spots of anisotropic conductive adhesive on a surface of the target substrate; moving the adsorption device or the target substrate wherein each of the plurality of LEDs adsorbed by the adsorption device becomes in contact with one of the plurality of spots of anisotropic conductive adhesive; and curing the plurality of spots of anisotropic conductive adhesive on the target substrate and moving away the adsorption device.
    Type: Application
    Filed: February 21, 2022
    Publication date: June 2, 2022
    Inventors: PO-LIANG CHEN, YUNG-FU LIN, HIROHISA TANAKA, YASUNORI SHIMADA
  • Patent number: 11295971
    Abstract: An adsorption device includes a magnetic plate and a limiting layer. A surface of the magnetic plate includes a first region and a plurality of second regions spaced apart from each other. The first region and each second region do not overlap with each other. The first region forms a magnetic pole of the magnetic plate, and each second region forms the opposite magnetic pole of the magnetic plate. The limiting layer covers the first region. Each second region is exposed to the limiting layer and configured for adsorbing a small-scale LED as a target object.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: April 5, 2022
    Assignee: Century Technology (Shenzhen) Corporation Limited
    Inventors: Po-Liang Chen, Yung-Fu Lin, Hirohisa Tanaka, Yasunori Shimada
  • Publication number: 20210398832
    Abstract: A method for making an adsorption device includes: providing and etching a substrate to form a plurality of receiving grooves spaced apart from each other; forming a magnetic film in each of the plurality of receiving grooves; and forming a magnet in each of the plurality of receiving grooves. Each receiving groove includes a bottom wall and a side wall coupling the bottom wall. The magnetic film covers the bottom wall and the side wall of each of receiving groove.
    Type: Application
    Filed: August 31, 2021
    Publication date: December 23, 2021
    Inventors: PO-LIANG CHEN, YUNG-FU LIN, HIROHISA TANAKA, YASUNORI SHIMADA
  • Patent number: 11139187
    Abstract: An adsorption device includes a substrate, a plurality of magnetic films, and a plurality of magnets. The substrate defines a plurality of receiving grooves spaced apart from each other. Each receiving groove defines a bottom wall and a side wall. Each magnetic film is in one receiving groove and covers the bottom wall and the side wall. The magnetic films are made of magnetic material. Each magnet is in one receiving groove. Each magnetic film is between the substrate and one magnet, a large number of magnetized LEDs of very small size are attracted on a one-to-one basis to the receiving grooves for transfer and placement of the LEDs onto a display panel which is in the course of being manufactured.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: October 5, 2021
    Assignee: Century Technology (Shenzhen) Corporation Limited
    Inventors: Po-Liang Chen, Yung-Fu Lin, Hirohisa Tanaka, Yasunori Shimada
  • Publication number: 20210005489
    Abstract: An adsorption device includes a magnetic plate and a limiting layer. A surface of the magnetic plate includes a first region and a plurality of second regions spaced apart from each other. The first region and each second region do not overlap with each other. The first region forms a magnetic pole of the magnetic plate, and each second region forms the opposite magnetic pole of the magnetic plate. The limiting layer covers the first region. Each second region is exposed to the limiting layer and configured for adsorbing a small-scale LED as a target object.
    Type: Application
    Filed: August 22, 2019
    Publication date: January 7, 2021
    Inventors: PO-LIANG CHEN, YUNG-FU LIN, HIROHISA TANAKA, YASUNORI SHIMADA
  • Publication number: 20210005488
    Abstract: An adsorption device includes a substrate, a plurality of magnetic films, and a plurality of magnets. The substrate defines a plurality of receiving grooves spaced apart from each other. Each receiving groove defines a bottom wall and a side wall. Each magnetic film is in one receiving groove and covers the bottom wall and the side wall. The magnetic films are made of magnetic material. Each magnet is in one receiving groove. Each magnetic film is between the substrate and one magnet, a large number of magnetized LEDs of very small size are attracted on a one-to-one basis to the receiving grooves for transfer and placement of the LEDs onto a display panel which is in the course of being manufactured.
    Type: Application
    Filed: August 22, 2019
    Publication date: January 7, 2021
    Inventors: PO-LIANG CHEN, YUNG-FU LIN, HIROHISA TANAKA, YASUNORI SHIMADA
  • Publication number: 20210005490
    Abstract: An adsorption device includes a substrate and a magnetic film on a surface of the substrate. The substrate has magnetic properties and is capable of generating magnetic field. The magnetic film partially covers the surface. The magnetic film generates a magnetic field having a direction that is opposite to a direction of the magnetic field generated by the substrate. Portions of the surface of the substrate not covered by the magnetic film form positions to attract and adsorb target objects, and other portion of the surface of the substrate covered by the magnetic film is not able to attract any target object.
    Type: Application
    Filed: August 22, 2019
    Publication date: January 7, 2021
    Inventors: PO-LIANG CHEN, YUNG-FU LIN, HIROHISA TANAKA, YASUNORI SHIMADA
  • Publication number: 20210002087
    Abstract: A device to attract and hold microscopic items such as micro LEDs magnetically rather than by static electricity includes a substrate and a plurality of magnetic units on a surface of the substrate. The magnetic units are spaced apart from each other and are constrained in the size and direction of their individual magnetic fields. Each of the magnetic units includes a magnet and a cladding layer partially covering the magnet. The cladding layer is made of a magnetic material. A side of the magnet away from the substrate is exposed from the cladding layer to attract and hold one micro LED.
    Type: Application
    Filed: August 21, 2019
    Publication date: January 7, 2021
    Inventors: PO-LIANG CHEN, YUNG-FU LIN, HIROHISA TANAKA, YASUNORI SHIMADA
  • Patent number: 10691026
    Abstract: An illumination optical system which illuminates an illumination objective surface with a light from a light source. The illumination optical system includes a spatial light modulator which includes a plurality of optical elements arranged within a predetermined plane and controlled individually, and which forms a light intensity distribution in an illumination pupil of the illumination optical system; and a polarization unit which is arranged in a position optically conjugate with the predetermined plane, and which polarizes an incident light beam having a first and second partial light beams, coming into the polarization unit such that the first and second partial light beams have polarization states different from each other, and emits the polarized incident light beam as an outgoing light beam, wherein the polarization unit changes, in a cross section of the outgoing light beam, a ratio between a cross sectional areas of the first and second partial light beams.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: June 23, 2020
    Assignee: NIKON CORPORATION
    Inventors: Osamu Tanitsu, Hirohisa Tanaka, Kinya Kato, Takashi Mori
  • Patent number: 10578973
    Abstract: An illumination optical system can form a pupil intensity distribution with a desired beam profile. The illumination optical system for illuminating an illumination target surface with light from a light source is provided with a spatial light modulator which has a plurality of optical elements arrayed on a predetermined surface and individually controlled and which variably forms a light intensity distribution on an illumination pupil of the illumination optical system; a divergence angle providing member which is arranged in a conjugate space including a surface optically conjugate with the predetermined surface and which provides a divergence angle to an incident beam and emits the beam; and a polarizing member which is arranged at a position in the vicinity of the predetermined surface or in the conjugate space and which changes a polarization state of a partial beam of a propagating beam propagating in an optical path.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: March 3, 2020
    Assignee: Nikon Corporation
    Inventors: Hirohisa Tanaka, Hiroshi Ooki, Shinichi Nakajima
  • Patent number: 10522843
    Abstract: A supported bi-metallic non-platinum catalyst that is capable of oxidizing hydrazine to produce, as by-products of energy production, nitrogen, water, and zero or near-zero levels of ammonia is described. The catalyst is suitable for use in fuel cells, particularly those that utilizes an anion-exchange membrane and a liquid fuel such as hydrazine.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: December 31, 2019
    Assignee: STC. UNM
    Inventors: Alexey Serov, Plamen B Atanassov, Tomokazu Sakamoto, Hirohisa Tanaka, Koichiro Asazawa
  • Publication number: 20190137887
    Abstract: An illumination optical system which illuminates an illumination objective surface with a light from a light source. The illumination optical system includes a spatial light modulator which includes a plurality of optical elements arranged within a predetermined plane and controlled individually, and which forms a light intensity distribution in an illumination pupil of the illumination optical system; and a polarization unit which is arranged in a position optically conjugate with the predetermined plane, and which polarizes an incident light beam having a first and second partial light beams, coming into the polarization unit such that the first and second partial light beams have polarization states different from each other, and emits the polarized incident light beam as an outgoing light beam, wherein the polarization unit changes, in a cross section of the outgoing light beam, a ratio between a cross sectional areas of the first and second partial light beams.
    Type: Application
    Filed: January 2, 2019
    Publication date: May 9, 2019
    Applicant: NIKON CORPORATION
    Inventors: Osamu TANITSU, Hirohisa TANAKA, Kinya KATO, Takashi MORI
  • Patent number: 10283692
    Abstract: A power generation system includes: a heat source having a temperature being changed over time; a flow passage through which a heat medium heated by the heat source passes; a power generation device including a power generation element and a first electrode, the power generation element being electrically polarized by temperature change thereof depending on temperature change of the heat medium, the first electrode extracting electric power from the power generation element; a temperature detection device being disposed on an upstream side relative to the power generation device in the flow passage and detecting the temperature of the heat medium; a voltage application device that applies voltage to the power generation element; and a control device that activates the voltage application device when the temperature increase of the heat medium has been detected and deactivates the voltage application unit when the temperature decrease of the heat medium has been detected.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: May 7, 2019
    Assignees: DAIHATSU MOTOR CO., LTD., NATIONAL UNIVERSITY CORPORATION NAGAOKA OF TECHNOLOGY
    Inventors: Satoru Yamanaka, Yoonho Kim, Takashi Ogawa, Akira Nakajima, Juyoung Kim, Hirohisa Tanaka, Tadachika Nakayama, Masatoshi Takeda, Noboru Yamada, Koichi Niihara
  • Patent number: 10175583
    Abstract: An illumination optical system which illuminates an illumination objective surface with a light from a light source. The illumination optical system includes a spatial light modulator which includes a plurality of optical elements arranged within a predetermined plane and controlled individually, and which forms a light intensity distribution in an illumination pupil of the illumination optical system; and a polarization unit which is arranged in a position optically conjugate with the predetermined plane, and which polarizes an incident light beam having a first and second partial light beams, coming into the polarization unit such that the first and second partial light beams have polarization states different from each other, and emits the polarized incident light beam as an outgoing light beam, wherein the polarization unit changes, in a cross section of the outgoing light beam, a ratio between a cross sectional areas of the first and second partial light beams.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: January 8, 2019
    Assignee: NIKON CORPORATION
    Inventors: Osamu Tanitsu, Hirohisa Tanaka, Kinya Kato, Takashi Mori