Patents by Inventor Hiroshi Hamada

Hiroshi Hamada 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: 20210111674
    Abstract: A source injection mixer includes an FET, an IF matching circuit between an IF port and a gate of the FET, and that matches impedance of the IF port and impedance of the gate as viewed from the IF port, a shorting stub of which one end is connected to a source of the FET and another end is grounded, and shorter than ΒΌ of an electric length at a frequency of LO signals, an LO matching circuit between an LO port and the source of the FET, and that matches impedance of the LO port and impedance of the source as viewed from the LO port, and an RF matching circuit between an RF port and a drain of the FET, and that matches impedance of the RF port and impedance of the drain as viewed from the RF port.
    Type: Application
    Filed: February 21, 2019
    Publication date: April 15, 2021
    Inventors: Hiroshi Hamada, Teruo Jo, Hideyuki Nosaka
  • Patent number: 10978605
    Abstract: Provided are a semiconductor photodiode which achieves a higher response rate in a state in which light receiving sensitivity is maintained. The semiconductor photodiode includes a p-type semiconductor contact layer, an n-type semiconductor contact layer, and a light absorption layer. The light absorption layer includes a first semiconductor absorption layer having a thickness Wd and a p-type second semiconductor absorption layer having a thickness Wp. The first semiconductor absorption layer and the second absorption layer are made of the same composition. The first semiconductor absorption layer is depleted, and the second semiconductor absorption layer maintains an electric charge neutral condition except for a region near an interface with the first semiconductor absorption layer. A relationship between the thickness Wd and the thickness Wp satisfies 0.47?Wp/(Wp+Wd)?0.9.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: April 13, 2021
    Assignee: Lumentum Japan, Inc.
    Inventors: Takashi Toyonaka, Hiroshi Hamada, Shigehisa Tanaka
  • Publication number: 20210060611
    Abstract: Provided is a vibration panel including an inner member, a first outer member, a second outer member, a piezoelectric actuator, an actuator bonding layer, and a filler. The inner member includes first and second main surfaces. The first outer member includes third and fourth main surfaces, the third main surface including a first region and a second region. The second outer member includes fifth and sixth main surfaces, the fifth main surface including a third region and a fourth region. The piezoelectric actuator causes vibration. The actuator bonding layer is disposed between the piezoelectric actuator and the second region and bonds the piezoelectric actuator to the second region. The filler fills a space between the second region and the fourth region and covers the piezoelectric actuator.
    Type: Application
    Filed: August 31, 2020
    Publication date: March 4, 2021
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Shigeo ISHII, Fumihisa ITO, Yukihiro MATSUI, Hiroshi HAMADA
  • Publication number: 20210054173
    Abstract: A flame retardant containing an aromatic phosphoric acid ester represented by the general formula (I): wherein R1 to R4, R7, and R8 each independently represent a C1-4 alkyl group or a C1-4 alkoxy group; R5, R6, and R9 each independently represent a C1-10 alkyl group or a C1-10 alkoxy group; n represents an integer of 1 to 10; n1 and n2 each independently represent an integer of 0 to 3; m1 and m2 each independently represent an integer of 0 to 4; p represents an integer of 0 to 26; and k represents an integer of 1 to 12; and when p is 2 or more, any two substituents R9 may be bonded to each other, and may be bonded to a carbon atom(s) of a ring to which the above substituents R9 are bonded, forming another ring.
    Type: Application
    Filed: December 25, 2018
    Publication date: February 25, 2021
    Applicant: DAIHACHI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Hiroshi TSUJI, Sakiko HAMADA
  • Publication number: 20210048888
    Abstract: A panel includes a vibration plate having a generally rectangular shape; and a piezoelectric actuator that is provided on a main surface of the vibration plate and causes the vibration plate to vibrate, in which the vibration plate is configured such that a length x in mm of a long side of the vibration plate and logarithmic decrement y of the vibration plate satisfy Expression 1 below: y?32.6x?1 ??(Expression 1).
    Type: Application
    Filed: August 12, 2020
    Publication date: February 18, 2021
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Hiroshi HAMADA, Yukihiro MATSUI, Takashi TOMITA
  • Patent number: 10919094
    Abstract: Cutting machining is performed on a workpiece by making a cutting tool travel relative to the workpiece while rotating the cutting tool such that a peripheral speed of the cutting tool becomes equal to or more than a cutting speed of the cutting tool, while an outer peripheral surface and an end surface of the cutting tool function as a rake surface and a relief surface, respectively.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: February 16, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Takayuki Azuma, Yoshihiko Yamada, Kenji Hamada, Masahiro Kiji, Hiroshi Watanabe
  • Patent number: 10908333
    Abstract: Provided is an optical film 10 including a light-transmitting base material 11 and a light-transmitting functional layer 12 provided on one surface of the light-transmitting base material 11, wherein the optical film 10 has a spectral transmittance of less than 1% at a wavelength of 380 nm, a spectral transmittance of 10% or more and less than 60% at a wavelength of 410 nm, and a spectral transmittance of 70% or more at a wavelength of 440 nm, and wherein the light-transmitting functional layer 12 has a film thickness of 9 ?m or less.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: February 2, 2021
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Takahisa Nomura, Takanori Hamada, Masataka Nakashima, Kentaro Hata, Hiroshi Nakamura, Hiroki Nakagawa
  • Publication number: 20210021248
    Abstract: A gain adjustment unit constituted by a distribution switch having a control terminal is provided in an input unit of an amplifier circuit. One end of a coupler is connected to an output line of the amplifier circuit, another end of the coupler is connected to an anode of a diode, and a monitor terminal is connected via a low-pass filter to a cathode of the diode. The anode of the diode is unbiased.
    Type: Application
    Filed: February 27, 2019
    Publication date: January 21, 2021
    Inventors: Hiroshi Hamada, Hideyuki Nosaka
  • Patent number: 10897674
    Abstract: An electroacoustic transducer includes a piezoelectric speaker and a housing. The piezoelectric speaker has: a first vibration plate with a periphery; a piezoelectric element placed on at least one face of the first vibration plate; and multiple openings that are provided around the piezoelectric element and penetrate through the first vibration plate in its thickness direction that is a first axis direction. The housing has: a supporting part that directly or indirectly supports the periphery; and a sound introduction port that faces the piezoelectric speaker in the first axis direction. The sound introduction port is provided at a position where it does not overlap, in the first axis direction, a first opening having the largest open area among the multiple openings. The electroacoustic transducer can improve the acoustic characteristics of a piezoelectric speaker.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: January 19, 2021
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Shigeo Ishii, Hiroshi Hamada, Yutaka Doshida, Takashi Tomita
  • Publication number: 20210013576
    Abstract: A high frequency connection structure includes: a waveguide; a ridge coupler constituted by a conductor formed inside one end of the waveguide; a transmission line adjacent to the one end of the waveguide; an inductance adjustment structure which is provided between the ridge coupler and the transmission line and which adjusts ground inductance that is created due to a connection between the ridge coupler and the waveguide; and a wire which connects one end of the ridge coupler on a side of the transmission line and one end of the transmission line with each other.
    Type: Application
    Filed: February 22, 2019
    Publication date: January 14, 2021
    Inventors: Hiroshi Hamada, Teruo Jo, Hideyuki Nosaka
  • Patent number: 10883480
    Abstract: A control valve includes: a first valve to control a flow rate of refrigerant flowing from a discharge chamber to a control chamber of a compressor; a second valve to control a flow rate of the refrigerant flowing from the control chamber to a suction chamber; a solenoid to generate a drive force in a first valve closing direction and a second valve opening direction; a biasing member to generate a biasing force in an first valve opening direction and a second valve closing direction; and a pressure sensing part to sense a pressure in the suction chamber or the control chamber, and generate a counterforce against the drive force.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: January 5, 2021
    Assignee: TGK CO., LTD.
    Inventors: Kazuhiro Irie, Masaaki Tonegawa, Hiroshi Hamada
  • Publication number: 20200411075
    Abstract: An apparatus is described. The apparatus according to an embodiment includes a voltage dividing resistor circuit formed on a semiconductor substrate and including first and second resistors and first and second selector switches. The first and second resistors and the first and second selector switches are arranged with one of first and second layouts. The first layout is such that the first and second selector switches are placed between the first and second resistors. The second layout is such that the first and second resistors are placed between the first and second selector switches.
    Type: Application
    Filed: September 11, 2020
    Publication date: December 31, 2020
    Applicant: Micron Technology, Inc.
    Inventors: Takayori Hamada, Yuki Miura, Hiroshi Shimizu
  • Publication number: 20200412300
    Abstract: A resistive mixer includes a LO matching circuit inserted between the gate of an FET and a LO terminal, a bias circuit that is connected to the gate and applies a bias voltage to the gate, an RF matching circuit inserted between the drain of the FET and an RF terminal, and an IF matching circuit inserted between the drain and an IF terminal. The source of the FET is grounded. The impedance of the RF matching circuit seen from the drain of the FET at an IF frequency is open-circuit, and the impedance of the IF matching circuit seen from the drain of the FET at an RF frequency is open-circuit.
    Type: Application
    Filed: February 13, 2019
    Publication date: December 31, 2020
    Inventors: Hiroshi Hamada, Teruo Jo, Hideyuki Nosaka
  • Publication number: 20200404816
    Abstract: A high-frequency module includes: a chassis which is made of a conductor and which has an internal space; a high-frequency circuit board which is housed in the internal space of the chassis; and a resistive element provided between an inner wall that opposes the high-frequency circuit board among inner walls of the chassis which define the internal space and the high-frequency circuit board.
    Type: Application
    Filed: March 8, 2019
    Publication date: December 24, 2020
    Inventors: Hiroshi Hamada, Hideyuki Nosaka
  • Publication number: 20200395893
    Abstract: A distributed mixer is configured of an artificial transmission line of which an input end is connected to an LO terminal and a terminal end is connected to an IF terminal, an artificial transmission line of which an input end is connected to an RF terminal, FETs that perform frequency synthesis of LO signals and RF signals and that are disposed following the artificial transmission lines and of which gates are connected to the artificial transmission line and sources are grounded, a bias circuit that applies gate bias voltage to a terminal end of the artificial transmission line, a terminating resistor that connects the terminal end of the artificial transmission line and a ground, and a plurality of transmission lines provided between the artificial transmission line and a drain of each FET.
    Type: Application
    Filed: February 21, 2019
    Publication date: December 17, 2020
    Inventors: Hiroshi Hamada, Teruo Jo, Hideyuki Nosaka
  • Patent number: 10864699
    Abstract: A composite material member having an FRP layer made of fiber-reinforced plastic, and a resin-rich layer that has a fiber content that is 5% or less of the fiber content of the FRP layer. The resin-rich layer is formed in at least a partial region of a surface of the FRP layer, and is formed from the same resin as a matrix resin of the fiber-reinforced plastic. A hole is bored so as to penetrate the FRP layer and the resin-rich layer.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: December 15, 2020
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yukihiro Hamada, Hiroshi Ookubo
  • Patent number: 10837431
    Abstract: A control valve includes: a body having a control chamber communication port and a suction chamber communication port; a valve element that moves toward and away from a valve hole to close and opening a bleed valve, the ports communicating with each other through the valve hole; a solenoid to generate a drive force in an opening direction of the bleed valve; and a pressure sensing element to sense a pressure in the suction chamber or a pressure in the control chamber, and generate a counterforce against the drive force from the solenoid depending on a magnitude of the sensed pressure. An opening degree of the bleed valve is controlled so that the sensed pressure becomes a set pressure. A bleed passage for delivering the refrigerant introduced through the control chamber communication port to the suction chamber even while the bleed valve is in a closed state is formed.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: November 17, 2020
    Assignee: TGK CO., LTD.
    Inventors: Masaaki Tonegawa, Hiroshi Hamada
  • Patent number: 10840469
    Abstract: Each of subpixels includes: an upper electrode; a lower electrode; an organic light-emitting layer sandwiched between the upper electrode and the lower electrode; and a lower carrier supply layer sandwiched between the lower electrode and the organic light-emitting layer. The lower carrier supply layer is configured to: make contact with the lower electrode and the organic light-emitting layer, respectively; supply carriers from the lower electrode to the organic light-emitting layer; cover the lower electrode entirely in an opening of the pixel defining layer; and have an edge at a top surface of the pixel defining layer surrounding the lower electrode. The organic light-emitting layer covers an entire surface of the lower carrier supply layer including the edge of the lower carrier supply layer.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: November 17, 2020
    Assignees: XIAMEN TIANMA MICRO-ELECTRONICS CO., LTD., TIANMA JAPAN, LTD.
    Inventors: Keita Hamada, Hiroshi Tanabe
  • Publication number: 20200357937
    Abstract: A semiconductor light-receiving element includes a substrate; a light-receiving mesa portion, formed on top of the substrate, including a first semiconductor layer of a first conductivity type, an absorption layer, and a second semiconductor layer of a second conductivity type; a light-receiving portion electrode, formed above the light-receiving mesa portion, connected to the first semiconductor layer; a pad electrode formed on top of the substrate; and a bridge electrode, placed so that an insulating gap is interposed between the bridge electrode and the second semiconductor layer, configured to connect the light-receiving portion electrode and the pad electrode on top of the substrate, the bridge electrode being formed in a layer separate from layers of the light-receiving portion electrode and the pad electrode.
    Type: Application
    Filed: April 9, 2020
    Publication date: November 12, 2020
    Inventors: Ryu WASHINO, Hiroshi HAMADA, Takafumi TANIGUCHI
  • Publication number: 20200348084
    Abstract: A heat exchanger is configured to exchange heat between a heat medium and an air. The heat exchanger includes a tube through which the heat medium flows therein, and a fin that is formed by bending a metal plate and that is brazed to a surface of the tube. The fin includes a louver. The surface of the tube defines an introducing groove configured to introduce a brazing material melted at brazing from a connecting portion between the tube and the fin to an other portion.
    Type: Application
    Filed: July 15, 2020
    Publication date: November 5, 2020
    Inventors: Hiroshi HAMADA, Tomohiko NAKAMURA, Yuta MATSUDA