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公开(公告)号：US11489460B2
公开(公告)日：2022-11-01
申请号：US17053609
申请日：2019-04-25
Applicant: The University of Tokyo , SAGINOMIYA SEISAKUSHO, INC.
Inventor： Hiroshi Toshiyoshi , Hisayuki Ashizawa , Masahiro Morita
Abstract: The vibration-driven energy harvester includes: a first electrode; a second electrode facing the first electrode; a holder holding the first electrode and the second electrode so as to be movable relative to each other; a half-wave rectifier electrically connected to the first and the second electrodes that causes current flowing from the first electrode to the second electrode to flow to an output unit, and cuts off current flowing from the second electrode toward the first electrode; and a second rectifying element electrically connected to the first and the second electrodes that allows the current flowing from the second electrode to the first electrode and blocks the current flowing from the first electrode to the second electrode, wherein: the first electrode has a positively charged electret in a surface facing the second electrode, or the second electrode has a negatively charged electret in a surface facing the first electrode.
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公开(公告)号：US20220324697A1
公开(公告)日：2022-10-13
申请号：US17615978
申请日：2020-03-19
Applicant: The University of Tokyo , Saginomiya Seisakusho, Inc.
Inventor： Hiroshi Toshiyoshi , Hiroaki Honma , Hiroyuki Mitsuya
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.
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公开(公告)号：US11848614B2
公开(公告)日：2023-12-19
申请号：US17059959
申请日：2019-05-30
Applicant: The University of Tokyo , Saginomiya Seisakusho, Inc.
Inventor： Hiroshi Toshiyoshi , Hisayuki Ashizawa , Masahiro Morita
CPC classification number: H02M3/335 , H02J50/001
Abstract: A power supply circuit that outputs an electric power that is input from a vibration-driven energy harvesting element to an external load, includes: a negative half-wave rectifying circuit that half-wave rectifies an alternating current power that is input from the vibration-driven energy harvesting element, into a negative voltage output; an inverting chopper circuit that inverts and outputs the negative voltage output which is output from the negative half-wave rectifying circuit, into a positive voltage output.
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公开(公告)号：US12215019B2
公开(公告)日：2025-02-04
申请号：US17615978
申请日：2020-03-19
Applicant: The University of Tokyo , Saginomiya Seisakusho, Inc.
Inventor： Hiroshi Toshiyoshi , Hiroaki Honma , Hiroyuki Mitsuya
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.
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公开(公告)号：US11722074B2
公开(公告)日：2023-08-08
申请号：US17289115
申请日：2019-11-15
Applicant: The University of Tokyo , Saginomiya Seisakusho, Inc.
Inventor： Hiroshi Toshiyoshi , Hiroaki Honma , Hiroyuki Mitsuya
IPC: H02N1/08
CPC classification number: H02N1/08
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 μm; 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.
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Patent Agency Ranking
公开(公告)号：US11716033B2
公开(公告)日：2023-08-01
申请号：US17053598
申请日：2019-04-19
Applicant: The University of Tokyo , SAGINOMIYA SEISAKUSHO, INC.
Inventor： Hiroshi Toshiyoshi , Hisayuki Ashizawa , Masahiro Morita
CPC classification number: H02N1/08 , B81B3/0086 , B81B2203/0163
Abstract: A vibration-driven energy harvesting element that outputs an alternating current power from an output line, due to vibration from outside includes: an intermediate electrode that is not connected to the output line; a plurality of electret electrodes, each electret electrode being arranged to face the intermediate electrode and having an electret on at least a part of a surface of the electret electrode on a side facing the intermediate electrode; a holding unit that holds the intermediate electrode and the plurality of electret electrodes such that the intermediate electrode and the plurality of electret electrodes can vibrate with respect to each other; and a charge injector that injects a charge having characteristics opposite to a charge of the electrets formed in the surfaces of the plurality of electret electrodes, to the intermediate electrode.
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公开(公告)号：US11552579B2
公开(公告)日：2023-01-10
申请号：US16464610
申请日：2017-11-13
Applicant: The University of Tokyo , Saginomiya Seisakusho, Inc.
Inventor： Hiroshi Toshiyoshi , Hiroyuki Fujita , Hisayuki Ashizawa , Hiroyuki Mitsuya , Kazunori Ishibashi
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.
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公开(公告)号：US20220360199A1
公开(公告)日：2022-11-10
申请号：US17621398
申请日：2020-06-19
Applicant: The University of Tokyo , Saginomiya Seisakusho, Inc.
Inventor： Takeaki Yajima , Hiroshi Toshiyoshi , Hiroaki Honma , Yukiya Tohyama , Hiroyuki Mitsuya
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.
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公开(公告)号：US11451167B2
公开(公告)日：2022-09-20
申请号：US17058328
申请日：2019-05-27
Applicant: The University of Tokyo , Saginomiya Seisakusho, Inc.
Inventor： Hiroshi Toshiyoshi , Hisayuki Ashizawa , Masahiro Morita
IPC: H02N1/08
Abstract: A vibration-driven energy harvesting device includes: a first vibration-driven energy harvesting assembly constituted with a first fixed comb tooth portion and a first movable comb tooth portion that are interdigitated with each other; a second vibration-driven energy harvesting assembly constituted with a second fixed comb tooth portion and a second movable comb tooth portion that are interdigitated with each other; a first output electrode connected to the first vibration-driven energy harvesting assembly; and a second output electrode connected to the second vibration-driven energy harvesting assembly, wherein: an output of the first vibration-driven energy harvesting assembly is different from an output of the second vibration-driven energy harvesting assembly.
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公开(公告)号：US12107518B2
公开(公告)日：2024-10-01
申请号：US17621398
申请日：2020-06-19
Applicant: The University of Tokyo , Saginomiya Seisakusho, Inc.
Inventor： Takeaki Yajima , Hiroshi Toshiyoshi , Hiroaki Honma , Yukiya Tohyama , Hiroyuki Mitsuya
CPC classification number: H02N11/002 , G05F1/561
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.
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