Patents by Inventor Hiroyuki Mitsuya

Hiroyuki Mitsuya 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: 12215019
    Abstract: An electrostatic device includes: a fixed portion, a moveable portion, and an elastically-supporting portion that are formed in a same substrate; and a first glass package and a second glass package that are anodically bonded to each other on one and the other of front and back surfaces of the substrate with the fixed portion and the elastically-supporting portion separated from each other, the second glass package forms a sealed space in which the moveable portion is arranged between the first and second glass packages, an electret is formed at least partially in the fixed portion and the moveable portion, and a first electrode connected to the fixed portion and exposed on an outer surface of the second glass package and a second electrode connected to the elastically-supporting portion and exposed on the outer surface of the second glass package are formed in the second glass package.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: February 4, 2025
    Assignees: The University of Tokyo, Saginomiya Seisakusho, Inc.
    Inventors: Hiroshi Toshiyoshi, Hiroaki Honma, Hiroyuki Mitsuya
  • Patent number: 12184204
    Abstract: A vibration-driven energy harvesting device includes a vibration-driven energy harvesting element that generates power according to vibrations of an electrode; an output unit that, when connected to a load resistor, extracts power generated by the vibration-driven energy harvesting element; a judgment unit that judges whether or not a power value of the power is greater than a predetermined threshold value; a determination unit that determines an input impedance of the output unit based on a judgment result obtained by the judgment unit; and an adjustment unit that adjusts the input impedance of the output unit according to a determination made by the determination unit.
    Type: Grant
    Filed: December 17, 2021
    Date of Patent: December 31, 2024
    Assignees: Saginomiya Seisakusho, Inc., Keio University
    Inventors: Hiroyuki Mitsuya, Hisayuki Ashizawa, Song-Ju Kim, Masashi Aono
  • Patent number: 12107518
    Abstract: An energy harvesting device having an energy converting element that converts environmental energy into electric energy, an environmental sensor that is disposed in an identical environment as the energy converting element, and a power supply circuit that receives electricity from the energy converting element and outputs the electricity to an external load. The power supply circuit is configured to change an operation condition of, for example, a voltage converting circuit of the power supply circuit, in accordance with an output of the environmental sensor.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: October 1, 2024
    Assignees: The University of Tokyo, Saginomiya Seisakusho, Inc.
    Inventors: Takeaki Yajima, Hiroshi Toshiyoshi, Hiroaki Honma, Yukiya Tohyama, Hiroyuki Mitsuya
  • Publication number: 20240204694
    Abstract: Provided is a long-life electret device preventing charge degradation of an electret element sealed in a closed space. The provided electret device includes a package member; a lid member; and an electret element. The lid member seals the package member to thereby form a closed space, the electret element is placed in the closed space, and a hydrogen getter is included in at least part of an inside of the closed space.
    Type: Application
    Filed: March 24, 2022
    Publication date: June 20, 2024
    Inventors: Kazunori Ishibashi, Takuma Ishiguro, Hiroyuki Mitsuya
  • Publication number: 20240162747
    Abstract: A monitoring device includes a vibration-driven energy harvesting element as a vibration-driven energy harvesting unit that performs power generation in response to a sound or a vibration being occurred by a monitoring target and having a predetermined frequency, and a notification unit that notifies a state change of the monitoring target based on a magnitude relationship between a predetermined threshold value and a voltage value of the power generation by the vibration-driven energy harvesting element. The notification unit is configured to notify the state change when the vibration-driven energy harvesting element performs the power generation. Therefore, the vibration-driven energy harvesting element, which functions as a sensor unit, requires no power supply.
    Type: Application
    Filed: March 24, 2022
    Publication date: May 16, 2024
    Inventors: Hiroyuki Mitsuya, Hisayuki Ashizawa, Takuro Ishikawa
  • Publication number: 20240097582
    Abstract: Provided is a vibration-driven energy harvesting device that can enhance the power generation efficiency of the vibration-driven energy harvesting device even in a case where vibration is changed. The vibration-driven energy harvesting device includes a vibration-driven energy harvesting element that generates power in accordance with vibration of an electrode; an output unit that supplies the power generated by the vibration-driven energy harvesting element to a load resistor once being connected to the load resistor; and an adjustment unit that adjusts an input impedance of the output unit in accordance with a signal corresponding to an acceleration in the vibration.
    Type: Application
    Filed: October 15, 2021
    Publication date: March 21, 2024
    Inventors: Hiroyuki Mitsuya, Hisayuki Ashizawa
  • Publication number: 20240056001
    Abstract: A vibration-driven energy harvesting device includes a vibration-driven energy harvesting element that generates power according to vibrations of an electrode; an output unit that, when connected to a load resistor, extracts power generated by the vibration-driven energy harvesting element; a judgment unit that judges whether or not a power value of the power is greater than a predetermined threshold value; a determination unit that determines an input impedance of the output unit based on a judgment result obtained by the judgment unit; and an adjustment unit that adjusts the input impedance of the output unit according to a determination made by the determination unit.
    Type: Application
    Filed: December 17, 2021
    Publication date: February 15, 2024
    Inventors: Hiroyuki Mitsuya, Hisayuki Ashizawa, Song-Ju Kim, Masashi Aono
  • Patent number: 11722074
    Abstract: A vibration-driven energy harvesting element includes: a pair of fixed electrode portions that have a plurality of fixed comb teeth and are arranged such that the plurality of fixed comb teeth face each other; and a movable electrode portion that is arranged between the pair of fixed electrode portions and has a pair of a plurality of movable comb teeth being inserted between the fixed comb teeth of the respective fixed electrode portions, wherein: the vibration-driven energy harvesting element has a three-terminal structure in which the fixed comb teeth and/or the movable comb teeth are electretized; a gap dimension of a clearance region between the fixed comb teeth and the movable comb teeth is smaller than 20 ?m; and an aspect ratio being a ratio of a dimension of the clearance region in a comb tooth height direction to the gap dimension of the clearance region, is 20 or more.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: August 8, 2023
    Assignees: The University of Tokyo, Saginomiya Seisakusho, Inc.
    Inventors: Hiroshi Toshiyoshi, Hiroaki Honma, Hiroyuki Mitsuya
  • Publication number: 20230098623
    Abstract: A vibrational energy harvester element includes: a first electrode; a second electrode that moves in a predetermined direction with respect to the first electrode; a third electrode; a fourth electrode that moves in the predetermined direction with respect to the third electrode; and a support portion that supports the second electrode and the fourth electrode so that they are movable along the predetermined direction; and wherein: the first electrode and the third electrode are disposed along the predetermined direction; at least one of facing surfaces of the first electrode and the second electrode, and at least one of facing surfaces of the third electrode and the fourth electrode, are electrically charged; and the support portion supports the second electrode and the fourth electrode in a state in which electrostatic force between the first electrode and the second electrode, and electrostatic force between the third electrode and the fourth electrode are balanced along the predetermined direction.
    Type: Application
    Filed: November 28, 2022
    Publication date: March 30, 2023
    Inventors: Hiroshi TOSHIYOSHI, Hiroyuki FUJITA, Hisayuki ASHIZAWA, Hiroyuki MITSUYA, Kazunori ISHIBASHI
  • Publication number: 20230016134
    Abstract: A measurement system includes: a vibration-driven energy harvesting unit that generates electric power from sound, vibration, or displacement; a power supply controller that controls an amount of power consumption of a power supply based on the electric power generated by the vibration-driven energy harvesting unit; a detector that is driven by electric power supplied by the power supply controller and detects an environment state quantity; and a transmitter that is driven by electric power supplied by the power supply controller and transmits information regarding the environment state quantity detected by the detector.
    Type: Application
    Filed: December 4, 2020
    Publication date: January 19, 2023
    Inventors: Takuro Ishikawa, Hiroyuki Mitsuya, Hisayuki Ashizawa, Tatsuya Tanaka
  • Patent number: 11552579
    Abstract: A vibrational energy harvester element includes: a first electrode; a second electrode that moves in a predetermined direction with respect to the first electrode; a third electrode; a fourth electrode that moves in the predetermined direction with respect to the third electrode; and a support portion that supports the second electrode and the fourth electrode so that they are movable along the predetermined direction; and wherein: the first electrode and the third electrode are disposed along the predetermined direction; at least one of facing surfaces of the first electrode and the second electrode, and at least one of facing surfaces of the third electrode and the fourth electrode, are electrically charged; and the support portion supports the second electrode and the fourth electrode in a state in which electrostatic force between the first electrode and the second electrode, and electrostatic force between the third electrode and the fourth electrode are balanced along the predetermined direction.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: January 10, 2023
    Assignees: The University of Tokyo, Saginomiya Seisakusho, Inc.
    Inventors: Hiroshi Toshiyoshi, Hiroyuki Fujita, Hisayuki Ashizawa, Hiroyuki Mitsuya, Kazunori Ishibashi
  • Publication number: 20220416692
    Abstract: A measurement system includes a vibration generation unit that generates sound or vibration in response to a change in environmental state quantity, a vibration-driven energy harvesting unit that generates electric power using the sound or vibration generated by the vibration generation unit, and a transmission unit that is driven with the electric power generated by the vibration-driven energy harvesting unit and transmits predetermined information.
    Type: Application
    Filed: January 13, 2021
    Publication date: December 29, 2022
    Inventors: Takuro Ishikawa, Hisayuki Ashizawa, Hiroyuki Mitsuya
  • Publication number: 20220360199
    Abstract: An environmental energy harvesting device comprises: an energy converting element that converts environmental energy into electric energy; an environmental sensor that is disposed in an identical environment as the energy converting element; and a power supply circuit that receives electricity converted into by the energy converting element and outputs the electricity to an outside. The power supply circuit changes an operation condition in accordance with an output of the environmental sensor.
    Type: Application
    Filed: June 19, 2020
    Publication date: November 10, 2022
    Inventors: Takeaki Yajima, Hiroshi Toshiyoshi, Hiroaki Honma, Yukiya Tohyama, Hiroyuki Mitsuya
  • Publication number: 20220324697
    Abstract: An electrostatic device includes: a fixed portion, a moveable portion, and an elastically-supporting portion that are formed in a same substrate; and a first glass package and a second glass package that are anodically bonded to each other on one and the other of front and back surfaces of the substrate with the fixed portion and the elastically-supporting portion separated from each other, the second glass package forms a sealed space in which the moveable portion is arranged between the first and second glass packages, an electret is formed at least partially in the fixed portion and the moveable portion, and a first electrode connected to the fixed portion and exposed on an outer surface of the second glass package and a second electrode connected to the elastically-supporting portion and exposed on the outer surface of the second glass package are formed in the second glass package.
    Type: Application
    Filed: March 19, 2020
    Publication date: October 13, 2022
    Inventors: Hiroshi Toshiyoshi, Hiroaki Honma, Hiroyuki Mitsuya
  • Publication number: 20220224253
    Abstract: This vibration-driven energy harvesting element includes a fixed part, a movable part, an elastic support part that is integrally formed with the movable part and that elastically supports the movable part, and a glass base part in which the fixed part and the elastic support part are anodically bonded to each other in a separated state.
    Type: Application
    Filed: March 19, 2020
    Publication date: July 14, 2022
    Inventors: Hiroshi Toshiyoshi, Hiroaki Honma, Hiroyuki Mitsuya
  • Patent number: 11374507
    Abstract: The present invention enables frequency response in a wide band without lowering the Q value. This vibrational energy harvester device is provided with: a movable part capable of vibration in a vibration direction as a result of mechanical vibrational energy applied from the exterior, said movable part being provided with a first surface along the vibration direction; and a fixed part provided with a second surface facing the first surface of the movable part with an interval therebetween, said fixed part being configured so as to be positionally fixed even against vibrational energy. A plurality of projections protruding in a direction orthogonal to the vibration direction are formed so as to be arranged like comb teeth in the vibration direction on each of the first surface of the movable part and the second surface of the fixed part. An electret film is formed on at least the first surface of the fixed part or on at least the second surface of the movable part.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: June 28, 2022
    Assignees: The University of Tokyo, National University Corporation Shizuoka University, Saginomiva Seisakusho, Inc.
    Inventors: Hiroshi Toshiyoshi, Gen Hashiguchi, Hiroyuki Mitsuya, Hiroshi Imamoto
  • Publication number: 20220014118
    Abstract: A vibration-driven energy harvesting element includes: a pair of fixed electrode portions that have a plurality of fixed comb teeth and are arranged such that the plurality of fixed comb teeth face each other; and a movable electrode portion that is arranged between the pair of fixed electrode portions and has a pair of a plurality of movable comb teeth being inserted between the fixed comb teeth of the respective fixed electrode portions, wherein: the vibration-driven energy harvesting element has a three-terminal structure in which the fixed comb teeth and/or the movable comb teeth are electretized; a gap dimension of a clearance region between the fixed comb teeth and the movable comb teeth is smaller than 20 ?m; and an aspect ratio being a ratio of a dimension of the clearance region in a comb tooth height direction to the gap dimension of the clearance region, is 20 or more.
    Type: Application
    Filed: November 15, 2019
    Publication date: January 13, 2022
    Inventors: Hiroshi TOSHIYOSHI, Hiroaki HONMA, Hiroyuki MITSUYA
  • Publication number: 20210331913
    Abstract: A vibration-driven energy harvesting element is formed by processing a substrate having a first Si layer and a second Si layer with an insulating layer in between. The vibration-driven energy harvesting element includes: a fixed electrode formed in the first Si layer; and a movable electrode formed in the second Si layer, opposed to the fixed electrode with a gap space formed in the insulating layer in between, and movable relative to the fixed electrode.
    Type: Application
    Filed: July 7, 2021
    Publication date: October 28, 2021
    Inventors: Hisayuki Ashizawa, Hiroyuki Mitsuya
  • Patent number: 11081977
    Abstract: Provided is an electrostatic-type vibrational energy harvester device that makes it possible to efficiently rectify and charge power from low acceleration to high acceleration of vibrational energy applied from the exterior. The vibrational energy harvester device is provided with: a movable part capable of vibrating in a vibration direction as a result of mechanical vibrational energy, said movable part being provided with a first surface along the vibration direction; and a fixed part provided with a second surface facing the first surface of the movable part with a gap therebetween so that it is possible for the movable part to vibrate in the vibration direction. A plurality of recessed portions and protruding sections are formed in an alternating manner in the vibration direction on the surfaces of each of the first surface of the movable part and the second surface of the fixed part. An electret film is formed on at least one of the fixed part and the movable part.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: August 3, 2021
    Assignees: The University of Tokyo, National University Corporation Shizuoka University, Saginomiya Seisakusho, Inc.
    Inventors: Hiroshi Toshiyoshi, Gen Hashiguchi, Hiroyuki Mitsuya, Hiroshi Imamoto
  • Publication number: 20210119556
    Abstract: A vibrational energy harvester element includes: a first electrode; a second electrode that moves in a predetermined direction with respect to the first electrode; a third electrode; a fourth electrode that moves in the predetermined direction with respect to the third electrode; and a support portion that supports the second electrode and the fourth electrode so that they are movable along the predetermined direction; and wherein: the first electrode and the third electrode are disposed along the predetermined direction; at least one of facing surfaces of the first electrode and the second electrode, and at least one of facing surfaces of the third electrode and the fourth electrode, are electrically charged; and the support portion supports the second electrode and the fourth electrode in a state in which electrostatic force between the first electrode and the second electrode, and electrostatic force between the third electrode and the fourth electrode are balanced along the predetermined direction.
    Type: Application
    Filed: November 13, 2017
    Publication date: April 22, 2021
    Inventors: Hiroshi TOSHIYOSHI, Hiroyuki FUJITA, Hisayuki ASHIZAWA, Hiroyuki MITSUYA, Kazunori ISHIBASHI