Patents by Inventor Masahiro Sasaki

Masahiro Sasaki 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: 20240137015
    Abstract: A semiconductor module, including: a first circuit board and a second circuit board respectively have a first switching element and a second switching element located thereon, each of the first and second switching elements having an emitter electrode; a first connecting portion and a second connecting portion respectively electrically connected to the emitter electrodes of the first and second switching elements over the first and second circuit boards; an auxiliary emitter terminal; and an auxiliary emitter wiring electrically connected to the auxiliary emitter terminal. The auxiliary emitter wiring includes: a branch point, a common wiring portion which connects the auxiliary emitter terminal and the branch point, and a first discrete wiring portion and a second discrete wiring portion which connect the branch point respectively to the first and second connecting portions, and which each have an inductance smaller than 10 percent of an inductance of the common wiring portion.
    Type: Application
    Filed: August 21, 2023
    Publication date: April 25, 2024
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Norihiro KOMIYAMA, Masahiro SASAKI
  • Publication number: 20240089093
    Abstract: An object is to prevent eavesdropping in quantum key distribution. A decoding unit decodes a quantum signal incident thereinto. A plurality of detect photons of the decoded quantum signal output from the decoding unit. A signal processing unit detects bits of the decoded quantum signal based on photon detection results of the plurality of detectors. A control unit perform switching processing by switching destinations to which two decoded quantum signals corresponding to one encoding basis are output between the plurality of detectors, and switching the bits detected by the signal processing unit based on the respective photon detection results of the plurality of detectors.
    Type: Application
    Filed: January 24, 2022
    Publication date: March 14, 2024
    Applicants: NEC CORPORATION, NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, THE UNIVERSITY OF TOKYO
    Inventors: Ken-ichiro YOSHINO, Mikio FUJIWARA, Akihisa TOMITA, Masato KOASHI, Masahiro TAKEOKA, Masahide SASAKI
  • Publication number: 20240085252
    Abstract: [Problem] To Provide a fabric-like sensor in which an output signal can be improved when in use and damage or fracture of a sensor element hardly occurs, and a fabric-like sensor device using it. Solution In a fabric-like sensor S having a fabric base material 1 and a line-shaped sensor element 2, at least one line-shaped cavity portion 11 is provided inside the fabric base material 1, and at least a part of the cavity portion 11 is composed of a raw fabric at least a part of the cavity portion has no elasticity in a line direction of the cavity portion 11, and further the line-shaped sensor element 2 is arranged in a state of not being substantially constrained or fixed in at least one of cavity portions in a fabric 1.
    Type: Application
    Filed: February 2, 2022
    Publication date: March 14, 2024
    Applicants: TOHO KASEI CO., LTD., SHINDO CO., LTD.
    Inventors: Ken OGASAWARA, Satoshi SHIMIZU, Masaaki SASAKI, Manabu NAKAJIMA, Masahiro MURAO, Ken MIYAZAKI
  • Publication number: 20240080184
    Abstract: An object is to prevent eavesdropping in quantum key distribution. A photon detector outputs an output current indicating a result of detecting a quantum signal. A current-voltage conversion unit converts the output current into an output voltage signal. An analog-to-digital converter outputs an output voltage signal obtained by analog-digital conversion of the output voltage signal. A signal processing unit performs predetermined signal processing on the output voltage signal, and outputs a photon detection signal indicating a result of detecting the quantum signal. When a time difference between a timing at which the quantum signal is incident into the photon detector and a reference timing determined based on a clock signal is not within a determination range, the photon detection signal is not output from the signal processing unit.
    Type: Application
    Filed: January 24, 2022
    Publication date: March 7, 2024
    Applicants: NEC Corporation, National Institute of Information and Communications Technology, NATIONAL UNIVERSTIY CORPORATION HOKKAIDO UNIVERSTIY, The University of Tokyo
    Inventors: Ken-ichiro YOSHINO, Mikio FUJIWARA, Akihisa TOMITA, Masato KOASHI, Masahiro TAKEOKA, Masahide SASAKI
  • Patent number: 11827502
    Abstract: A conveyance device (100) comprises: a carriage (10); a support column (20); a lifting device (30) that moves in the vertical direction along the support column (20); and a load platform (90) that is moved in the vertical direction by the lifting device (30). The lifting device (30) includes an upper guide (40), a lower guide (50), and a linking member (60) for linking an upper member (41) and a lower member (51) together. The upper guide (40) includes: a first wheel (42) that rolls on a rear surface (22) of the support column (20); and the upper member (41) which supports the first wheel (42). The lower guide (50) includes: a second wheel (52) that rolls on a front surface (21) of the support column (20); and the lower member (51) which supports the second wheel (52), the lower guide being disposed below the upper guide (40). The load platform (90) is disposed in front of the second wheel (52), and is linked to front side and rear side portions of the linking member (60).
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: November 28, 2023
    Assignee: MAKINO J CO., LTD.
    Inventors: Takudai Maenosono, Masahiro Sasaki, Noboru Murakami
  • Patent number: 11795933
    Abstract: A pump unit (100) includes a plurality of piezoelectric pumps (1), a flow path-defining member (50), and a heat-dissipating part (60). The plurality of piezoelectric pumps (1) each include a first flow path for sucking and discharging of fluid. The flow path-defining member (50) includes a second flow path for connection to the first flow paths in the plurality of piezoelectric pumps (1). Heat generated in the plurality of piezoelectric pumps (1) is dissipated through the heat-dissipating part (60). The heat-dissipating part (60) is disposed between the flow path-defining member (50) and each of the plurality of piezoelectric pumps (1). The heat-dissipating part (60) has through-holes through which the first flow paths are connected to the second flow path.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: October 24, 2023
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Yoshio Yamanaka, Masahiro Sasaki, Kenjiro Okaguchi, Shinichiro Matsumoto, Shizuka Ueda
  • Publication number: 20230309925
    Abstract: A biological-information acquisition device is provided that includes a biometric sensor part including a biometric sensor that detects biological information and a living-body wearable part that enables the biometric sensor part to be in contact with a living body and a main body part including an information processing section that processes biological information and a battery that supplies power. The biometric sensor part is configured to be replaceable by being separated from the main body part, and the main body part is detachably attached to the biometric sensor in such a manner as not to come into contact with a living body when the biometric sensor part is worn on the living body.
    Type: Application
    Filed: June 1, 2023
    Publication date: October 5, 2023
    Inventors: Masahiro SASAKI, Masashi FURUKUBO
  • Publication number: 20230231043
    Abstract: Provided is a semiconductor device including: a semiconductor substrate having an upper surface and a lower surface and having a drift region of a first conductivity type; a first main terminal provided above the upper surface; a second main terminal provided below the lower surface; a control terminal configured to control whether or not to cause a current to flow between the first main terminal and the second main terminal; and a buffer region provided between the drift region and the lower surface and having a higher doping concentration than the drift region. In a C-V characteristic indicating a relationship between a power supply voltage applied between the first main terminal and the second main terminal and an inter-terminal capacitance between the control terminal and the second main terminal, a region where the power supply voltage is 500 V or more has a peak of the inter-terminal capacitance.
    Type: Application
    Filed: March 22, 2023
    Publication date: July 20, 2023
    Inventors: Norihiro KOMIYAMA, Masahiro SASAKI, Yuichi ONOZAWA, Shoji YAMADA
  • Patent number: 11635458
    Abstract: Provided is an analyzing apparatus including a charge amount analyzing unit configured to analyze, by using a device simulator configured to simulate a transient change of a charge in a semiconductor device having a first main terminal and a second main terminal, a change of a charge amount at any one of the terminals when a power source voltage applied between the first main terminal and the second main terminal is changed by a displacement voltage smaller than an initial voltage after a current flowing between the first main terminal and the second main terminal is stabilized with the semiconductor device being set to an ON state and the power source voltage being set to the initial voltage, and a capacitance calculating unit configured to compute a terminal capacitance at any one of the terminals based on the change of the charge amount analyzed by the charge amount analyzing unit.
    Type: Grant
    Filed: March 22, 2022
    Date of Patent: April 25, 2023
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Norihiro Komiyama, Masahiro Sasaki, Yuichi Onozawa, Shoji Yamada
  • Publication number: 20230014848
    Abstract: A semiconductor device includes first semiconductor chips that each include a first control electrode and a first output electrode, second semiconductor chips each include a second control electrode and a second output electrode, first and second input circuit patterns on which the first and second input electrodes are disposed, respectively, first and second control circuit patterns electrically connected to the first and second control electrodes, respectively, first and second resistive elements, and a first inter-board wiring member. The first control electrodes and first resistive element are electrically connected via the first control circuit pattern, the second control electrodes and second resistive element are electrically connected via the second control circuit pattern, and at least one of the first output electrodes and at least one of the second output electrodes are electrically connected to each other via the first inter-board wiring member.
    Type: Application
    Filed: May 31, 2022
    Publication date: January 19, 2023
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Rikihiro MARUYAMA, Norihiro KOMIYAMA, Kunio KOBAYASHI, Yuto KOBAYASHI, Takahito HARADA, Hirohisa OYAMA, Masahiro SASAKI, Ryousuke USUI
  • Publication number: 20220334171
    Abstract: Provided is an analyzing apparatus including a charge amount analyzing unit configured to analyze, by using a device simulator configured to simulate a transient change of a charge in a semiconductor device having a first main terminal and a second main terminal, a change of a charge amount at any one of the terminals when a power source voltage applied between the first main terminal and the second main terminal is changed by a displacement voltage smaller than an initial voltage after a current flowing between the first main terminal and the second main terminal is stabilized with the semiconductor device being set to an ON state and the power source voltage being set to the initial voltage, and a capacitance calculating unit configured to compute a terminal capacitance at any one of the terminals based on the change of the charge amount analyzed by the charge amount analyzing unit.
    Type: Application
    Filed: March 22, 2022
    Publication date: October 20, 2022
    Inventors: Norihiro KOMIYAMA, Masahiro SASAKI, Yuichi ONOZAWA, Shoji YAMADA
  • Publication number: 20220235761
    Abstract: A fluid control device includes piezoelectric pumps and a substrate. The substrate includes dielectric base members. Each of the dielectric base members has a recess and a through-hole. Each of the dielectric base members is laminated such that the recesses of the dielectric base members partially overlap and communicate with each other. A portion of the recesses not overlapping with the dielectric base member serve as a first opening and a second opening, respectively, to the outside. The first opening and the second opening open in opposite directions in the lamination direction. The first opening and the second opening have shapes that may be fit to each other. The piezoelectric pump is on the dielectric base member to communicate with the through-hole, and the piezoelectric pump is on the dielectric base member to communicate with the through-hole.
    Type: Application
    Filed: April 19, 2022
    Publication date: July 28, 2022
    Inventors: Shinichiro MATSUMOTO, Masahiro SASAKI
  • Patent number: 11383326
    Abstract: A heat transfer body 3 is prepared. The heat transfer body 3 forms an inner space 7 for existence of one of a higher-temperature fluid or a lower-temperature fluid. The heat transfer body 3 constitutes a heat exchanger, and is formed of a copper material as a wall surrounding the inner space 7. In the wall, a flow path through which the other of the higher-temperature fluid and the lower-temperature fluid flows is formed. By LMD treatment, an LMD layer is formed directly on an outer circumferential surface 3a of the heat transfer body 3. In the LMD treatment, a metal material is supplied to a supply position on the outer circumferential surface 3a, and the supply position is irradiated with laser light to form an LMD layer 5. An energy density of the laser light is set to melt both the metal material and the outer circumferential surface 3a.
    Type: Grant
    Filed: May 28, 2018
    Date of Patent: July 12, 2022
    Assignees: IHI AEROSPACE CO., LTD., Japan Aerospace Exploration Agency
    Inventors: Ideo Masuda, Toshiki Kato, Takuma Inoue, Masahiro Sasaki
  • Publication number: 20220204330
    Abstract: A conveyance device (100) comprises: a carriage (10); a support column (20); a lifting device (30) that moves in the vertical direction along the support column (20); and a load platform (90) that is moved in the vertical direction by the lifting device (30). The lifting device (30) includes an upper guide (40), a lower guide (50), and a linking member (60) for linking an upper member (41) and a lower member (51) together. The upper guide (40) includes: a first wheel (42) that rolls on a rear surface (22) of the support column (20); and the upper member (41) which supports the first wheel (42). The lower guide (50) includes: a second wheel (52) that rolls on a front surface (21) of the support column (20); and the lower member (51) which supports the second wheel (52), the lower guide being disposed below the upper guide (40). The load platform (90) is disposed in front of the second wheel (52), and is linked to front side and rear side portions of the linking member (60).
    Type: Application
    Filed: February 20, 2020
    Publication date: June 30, 2022
    Applicant: MAKINO J CO., LTD.
    Inventors: Takudai MAENOSONO, Masahiro SASAKI, Noboru MURAKAMI
  • Publication number: 20220010753
    Abstract: A laser ignition device includes an excitation light source that generates excitation light, and a pulsed laser oscillator connected to the excitation light source, wherein the pulsed laser oscillator generates a plurality of pulsed light beams at a time of one ignition to produce an initial flame.
    Type: Application
    Filed: September 27, 2021
    Publication date: January 13, 2022
    Applicants: IHI CORPORATION, IHI AEROSPACE Co., Ltd., INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takahisa NAGAO, Mitsunori ITOU, Jun IZAWA, Yoshiki MATSUURA, Masahiro SASAKI, Takunori TAIRA
  • Patent number: 11154047
    Abstract: An aspect of the present invention relates to a wrapping tape for repelling insects, the wrapping tape having a number of male engagement elements on a front surface of a tape, and a number of loop-shaped engagement elements on a rear surface of the tape, wherein the male engagement elements and the loop-shaped engagement elements can be engaged each other, and an insect repellent component is applied at least to the front surface of the tape and the male engagement elements.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: October 26, 2021
    Assignee: KURARAY FASTENING CO., LTD.
    Inventors: Kouichi Kawabata, Satoru Ono, Takaya Hirano, Masahiro Sasaki
  • Publication number: 20210324851
    Abstract: A pump unit (100) includes a plurality of piezoelectric pumps (1), a flow path-defining member (50), and a heat-dissipating part (60). The plurality of piezoelectric pumps (1) each include a first flow path for sucking and discharging of fluid. The flow path-defining member (50) includes a second flow path for connection to the first flow paths in the plurality of piezoelectric pumps (1). Heat generated in the plurality of piezoelectric pumps (1) is dissipated through the heat-dissipating part (60). The heat-dissipating part (60) is disposed between the flow path-defining member (50) and each of the plurality of piezoelectric pumps (1). The heat-dissipating part (60) has through-holes through which the first flow paths are connected to the second flow path.
    Type: Application
    Filed: June 30, 2021
    Publication date: October 21, 2021
    Inventors: Yoshio YAMANAKA, Masahiro SASAKI, Kenjiro OKAGUCHI, Shinichiro MATSUMOTO, Shizuka UEDA
  • Patent number: 10998812
    Abstract: A detection error occurs due to ripple when a current transformer detects zero cross of current. Provided is a detection device for detecting zero cross of output current output from switching circuit including a first switching element and a second switching element connected in series, and the detection device has: an acquisition unit which acquires an observation value that is based on gate current or an observation value based on gate voltage of at least one switching element of the first switching element and the second switching element, during Miller period in which Miller capacitance between a drain and a gate is charged; and a detection unit which detects zero cross of output current flowing between (i) output terminal between first switching element and second switching element and (ii) a load connect to output terminal, based on observation value during Miller period.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: May 4, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Masahiro Sasaki
  • Patent number: 10910210
    Abstract: The present invention has as its object the provision of an ultraviolet sterilizer that can reduce ultraviolet light in a wavelength region of 230 to 300 nm, which is harmful to the human body, and can output effective light in a wavelength region of 200 to 230 nm with high emission intensity. The ultraviolet sterilizer of the present invention is an ultraviolet sterilizer comprising: an ultraviolet light source; a lamp storage chamber for storing the ultraviolet light source; and a light guiding part for guiding light from the ultraviolet light source, in which a band pass filter for reducing ultraviolet light in a wavelength region harmful to a human body is provided at least one of a position between the light guiding part and the lamp storage chamber and a position of a light outputting leading end of the light guiding part, and an inner surface of the light guiding part is formed from an ultraviolet absorbing member that absorbs the ultraviolet light in the wavelength region harmful to the human body.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: February 2, 2021
    Assignee: Ushio Denki Kabushiki Kaisha
    Inventors: Hideaki Yagyu, Ryosuke Ikeno, Masahiro Sasaki
  • Patent number: 10886910
    Abstract: A semiconductor device, including a main switching element having a gate terminal and an emitter terminal, a sense switching element connected to the main switching element for detecting a current flowing through the main switching element, and a voltage division circuit connected between the gate terminal and the emitter terminal of the main switching element. The voltage division circuit includes a first resistor and a second resistor connected in series. A connection point of the first resistor and the second resistor is connected to the sense switching element, so that a voltage applied to the gate terminal of the main switching element is divided by the voltage division circuit, and a portion of the voltage is applied to the sense switching element.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: January 5, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Masahiro Sasaki