Patents by Inventor Shuhei Yoshida

Shuhei Yoshida 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).

  • Electric power transmission device and electric power transmission method
    Patent number: 9866194
    Abstract: An electric power transmission device characterized in that the electric power transmission device includes a power transmitting unit which wirelessly transmits an electric power and a power receiving unit which receives the electric power, the power transmitting unit and the power receiving unit include a coil for electric power transmission and an inclusion unit made of a dielectric material covering the coil for electric power transmission, at least one of the power transmitting unit and the power receiving unit includes an impedance adjustment unit which varies the impedance thereof, and the electric power is transmitted at a resonance frequency determined by an impedance of the power transmitting unit, an impedance of the power receiving unit, and an impedance of the conducting medium.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: January 9, 2018
    Assignee: NEC Corporation
    Inventors: Shuhei Yoshida, Masahiro Tanomura
  • RESONATOR ELEMENT, RESONATOR, ELECTRONIC DEVICE, ELECTRONIC APPARATUS, AND MOVING OBJECT
    Publication number: 20170272054
    Abstract: A resonator element includes: a base portion including a first end surface that faces a first direction and a second end surface that faces a direction opposite to the first direction, a first vibrating arm that is provided integrally with the base portion and is connected to the first end surface; and a second vibrating arm that is provided integrally with the base portion along the first vibrating arm and is connected to the first end surface. When the shortest distance between the first end surface and the second end surface is Wb and an effective width between the shortest distance Wb and the base portion is We, 0.81?Wb/We?1.70 is satisfied.
    Type: Application
    Filed: June 6, 2017
    Publication date: September 21, 2017
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Akinori YAMADA, Shuhei YOSHIDA
  • Resonator element, resonator, electronic device, electronic apparatus, and moving object
    Patent number: 9705472
    Abstract: A resonator element includes: a base portion including a first end surface that faces a first direction and a second end surface that faces a direction opposite to the first direction, a first vibrating arm that is provided integrally with the base portion and is connected to the first end surface; and a second vibrating arm that is provided integrally with the base portion along the first vibrating arm and is connected to the first end surface. When the shortest distance between the first end surface and the second end surface is Wb and an effective width between the shortest distance Wb and the base portion is We, 0.81?Wb/We?1.70 is satisfied.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: July 11, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akinori Yamada, Shuhei Yoshida
  • Vibrator, oscillator, electronic device for controlling internal resonance between inherent vibration modes
    Patent number: 9654082
    Abstract: A vibrator includes a vibrator element and a base on which the vibrator element is installed. In addition, when n is set to a natural number equal to or greater than 2, and j is set to a natural number equal to or greater than 1 and equal to or less than n, the vibrator element includes n inherent vibration modes having resonance frequencies different from each other, and when a resonance frequency of a main vibration of the vibrator element in the n inherent vibration modes is set to ?1 in a relationship between an arbitrary integer kj and a resonance frequency ?j corresponding to each of the n inherent vibration modes, the following three expressions are all satisfied. ?? ? ( ? j = 2 n ? k j ? ? j - k 1 - ? 1 ) / ? 1 ? ? 1 ? ? 0.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: May 16, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akinori Yamada, Shuhei Yoshida, Takayuki Kikuchi
  • Wireless power feeding system and wireless power feeding method
    Patent number: 9641027
    Abstract: A wireless power feeding system capable of long distance and highly efficient space transmission of power is provided. A wireless power feeding system includes a power transmitter, a power receiver, and a power receiving body. The power transmitter generates electromagnetic waves. The power receiver is supplied with power by means of the electromagnetic waves received from the power transmitter using a magnetic field resonance phenomenon. The power receiving body is inserted into an electromagnetic field created by the power transmitter and the power receiver, and receives power by means of the electromagnetic field.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: May 2, 2017
    Assignee: NEC Corporation
    Inventors: Masayoshi Tsuji, Wataru Hattori, Masahiro Tanomura, Shuhei Yoshida
  • WIRELESS POWER TRANSMISSION CONTROL DEVICE, WIRELESS POWER TRANSMISSION SYSTEM, AND WIRELESS POWER TRANSMISSION CONTROL METHOD
    Publication number: 20160336805
    Abstract: In order to stably supply power even under a condition such that variations in a transmission environment occur constantly and irregularly in a wireless power transmission, a wireless power transmission control device of the present invention includes: a data collection means for obtaining data indicating the characteristics of a transmission medium for wireless transmission of power via a receiving antenna provided in a movable body; a data prediction means for deriving predicted transmission characteristics that predict a change in the characteristics of the transmission medium by using the data and for calculating a control parameter corresponding to the predicted transmission characteristics; and a parameter control means for controlling the movable body and the receiving antenna by using the control parameter.
    Type: Application
    Filed: January 15, 2015
    Publication date: November 17, 2016
    Applicant: NEC Corporation
    Inventors: Shuhei YOSHIDA, Masahiro TANOMURA, Kaoru SHIZUNO
  • VIBRATOR, OSCILLATOR, ELECTRONIC DEVICE
    Publication number: 20160322935
    Abstract: A vibrator includes a vibrator element and a base on which the vibrator element is installed. In addition, when n is set to a natural number equal to or greater than 2, and j is set to a natural number equal to or greater than 1 and equal to or less than n, the vibrator element includes n inherent vibration modes having resonance frequencies different from each other, and when a resonance frequency of a main vibration of the vibrator element in the n inherent vibration modes is set to ?1 in a relationship between an arbitrary integer kj and a resonance frequency ?j corresponding to each of the n inherent vibration modes, the following three expressions are all satisfied. ?? ? ( ? j = 2 n ? k j ? ? j - k 1 - ? 1 ) / ? 1 ? ? 1 ? ? 0.
    Type: Application
    Filed: April 22, 2016
    Publication date: November 3, 2016
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Akinori YAMADA, Shuhei YOSHIDA, Takayuki KIKUCHI
  • Electrode Active Material For Nonaqueous Electrolyte Secondary Battery, And Nonaqueous Electrolyte Secondary Battery
    Publication number: 20160315316
    Abstract: An electrode active material for a nonaqueous electrolyte secondary battery includes: a core part including at least one of an inorganic oxide and a carbon-composite inorganic composite oxide; and a shell part for carbon coating on the core part. The electrode active material has a specific surface area of 6.0 m2/g or more. The electrode active material has a moisture content of 400 ppm or less, which is measured by a Karl Fischer method such that the electrode active material is heated in a heat-evaporating manner, and continuously maintained at 250° C. for 40 minutes without exposing to an atmosphere after the electrode active material is exposed to the atmosphere to absorb moisture to be saturated.
    Type: Application
    Filed: April 20, 2016
    Publication date: October 27, 2016
    Inventors: Shuhei YOSHIDA, Koji OHIRA, Masaki UCHIYAMA, Daisuke SHIBATA
  • Assembled battery
    Patent number: 9455480
    Abstract: An assembled battery includes a plurality of secondary cells, a first arithmetic operator, a second arithmetic operator, and a discharger. The first arithmetic operator calculates a voltage change rate of each of the secondary cells during charging/discharging thereof. The second arithmetic operator determines a discharge condition for each of the secondary cells from the voltage change rate calculated in the first arithmetic operator and a state of charge of each of the secondary cells. The discharger performs discharging of each of the secondary cells on the basis of the discharge condition when the assembled battery is neither being charged nor being discharged. The second arithmetic operator determines the discharge condition of each of the secondary cells such that each of the secondary cells after the discharging has the same state of charge.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: September 27, 2016
    Assignee: DENSO CORPORATION
    Inventors: Shuhei Yoshida, Daisuke Shibata
  • Resonator element, resonator device, electronic apparatus, moving object, and method of manufacturing resonator element
    Patent number: 9425768
    Abstract: A resonator element has a base part, vibrating arms having first principal surfaces and second principal surfaces in front-rear relationships with each other and extending from the base part, and side surfaces connected to the first principal surfaces and the second principal surfaces on ends of the vibrating arms, and the side surfaces are slopes having tilts with respect to perpendicular lines of the first principal surfaces or the second principal surfaces and provided from the first principal surfaces to the second principal surfaces, and crystal faces.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: August 23, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akinori Yamada, Shuhei Yoshida
  • Electrode And Non-Aqueous Electrolyte Secondary Battery
    Publication number: 20160211515
    Abstract: An electrode includes an electrode material, which includes: a core part made of an active substance having a polyanion structure having Mn; and a shell part obtained by covering a surface of the core part with carbon. In addition, an amount of water, as measured by Karl Fischer's method when the electrode is held at 250° C. for 40 minutes after adsorbed water is volatilized by heating, is 1500 ppm or less.
    Type: Application
    Filed: January 13, 2016
    Publication date: July 21, 2016
    Inventors: Koji Ohira, Daisuke Shibata, Shuhei Yoshida, Keita Takahashi
  • Resonator element, resonator, oscillator, electronic apparatus, sensor, and mobile object
    Patent number: 9354128
    Abstract: A resonator element satisfies, when a shortest distance between a first end portion and a second end portion of a base is Wb [m], an effective width of the base in a Y axis direction is We [m], and a Q value of the resonator element is Q, the following expressions (A) and (B). Q={(?·Cp)/(c·?2·?)}×[{1+(2·?·Cp·We2·f/(?·k))2}/(2·?·Cp·We2·f/(?·k))]??(A) 0.81?Wb/We?1.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: May 31, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akinori Yamada, Shuhei Yoshida
  • POWER TRANSFER SYSTEM, POWER TRANSMITTING DEVICE, POWER RECEIVING DEVICE, AND POWER TRANSFER METHOD
    Publication number: 20160087456
    Abstract: A power transfer system includes a power transmitting device and a power receiving device that are opposed to each other with sandwiching a medium therebetween. The power transmitting device transmits electric power at a resonance frequency that is determined by an impedance of an electric power transmission path including the power transmitting device, the power receiving device, and the medium.
    Type: Application
    Filed: May 15, 2014
    Publication date: March 24, 2016
    Inventors: KAORU SHIZUNO, MASAHIRO TANOMURA, SHUHEI YOSHIDA
  • Resonator element, resonator, oscillator, electronic apparatus, physical quantity sensor, mobile object, and frequency adjustment method of resonator element
    Patent number: 9255802
    Abstract: A resonator element includes a base portion, and a vibrating arm which extends from the base portion and on which a weight portion is provided, and the weight portion includes a first weight portion which is disposed on one main surface of a distal end portion of the vibrating arm, and a second weight portion which is disposed on the distal end side with respect to the first weight portion and has a thickness smaller than that of the first weight portion. The vibrating arm transmits an energy beam, and a laser incidence area where incidence of the energy beam to the inside of the vibrating arm is allowed, is disposed in a position of the other main surface on the opposite side of the vibrating arm overlapped with the second weight portion.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: February 9, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akinori Yamada, Shuhei Yoshida, Takashi Ito, Keiji Nakagawa
  • Resonator element, resonator, oscillator, and electronic device
    Patent number: 9252349
    Abstract: A resonator element capable of improving impact resistance is provided. A quartz crystal resonator element is a resonator element formed by etching a Z plate which is cut at predetermined angles with respect to the crystal axes of a quartz crystal. The quartz crystal resonator element includes a base, a pair of resonating arms extending from the base in the Y-axis direction, and a positive X-axis notch and a negative X-axis notch formed by notching the base in the X-axis direction. The positive X-axis notch is formed by notching the base from the negative side of the X axis towards the positive side so that the width of the positive X-axis notch increases as it approaches the outer circumference.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: February 2, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Akinori Yamada, Shuhei Yoshida
  • Quartz resonator with cut sections formed on the support arm
    Patent number: 9231555
    Abstract: A quartz crystal resonator element includes a first electrode pad and a second electrode pad disposed on a lower surface of a support arm, and cut sections disposed in both principal surfaces (upper and lower surfaces) of the support arm between the first and second electrode pads so as to overlap each other, and the cut sections extend so that the support arm is cut from the side surface in the +X-axis direction of the support arm to the ?X-axis direction, and are provided with first surfaces roughly perpendicular to the X axis and first and second tilted surfaces extending in the +X-axis direction.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: January 5, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akinori Yamada, Shuhei Yoshida
  • POWER TRANSMISSION SYSTEM, TRANSMISSION APPARATUS, RECEIVING APPARATUS, AND POWER TRANSMISSION METHOD
    Publication number: 20150365066
    Abstract: A transmission apparatus transmits electric power via a medium that is present between the transmission apparatus and a receiving apparatus. The transmission apparatus includes: an antenna; and a power transmission circuit that outputs electric power via the antenna of the transmission apparatus, the electric power having a first resonance frequency determined by an impedance of the medium, an impedance of the antenna of the transmission apparatus, and an impedance of an antenna of the receiving apparatus.
    Type: Application
    Filed: February 20, 2014
    Publication date: December 17, 2015
    Inventors: Masahiro TANOMURA, Shuhei YOSHIDA, Kaoru SHIZUNO
  • Electric Power Transmission Device and Electric Power Transmission Method
    Publication number: 20150311880
    Abstract: An electric power transmission device characterized in that the electric power transmission device includes a power transmitting unit which wirelessly transmits an electric power and a power receiving unit which receives the electric power, the power transmitting unit and the power receiving unit include a coil for electric power transmission and an inclusion unit made of a dielectric material covering the coil for electric power transmission, at least one of the power transmitting unit and the power receiving unit includes an impedance adjustment unit which varies the impedance thereof, and the electric power is transmitted at a resonance frequency determined by an impedance of the power transmitting unit, an impedance of the power receiving unit, and an impedance of the conducting medium.
    Type: Application
    Filed: November 7, 2013
    Publication date: October 29, 2015
    Applicant: NEC CORPORATION
    Inventors: Shuhei YOSHIDA, Masahiro TANOMURA
  • ELECTRIC POWER TRANSMISSION DEVICE AND ELECTRIC POWER TRANSMISSION METHOD
    Publication number: 20150303702
    Abstract: An electric power transmission device for wirelessly transmitting electric power in a highly conductive medium includes a power transmitting unit configured to wirelessly transmit electric power and a power receiving unit configured to intromit the wireless electric power transmitted from the power transmitting unit. The power transmitting unit and the power receiving unit include an electric power transmission coil and a containment member having a dielectric configured to cover the electric power transmission coil, and transmit the electric power by causing resonance at a frequency determined by impedance of the power transmitting unit, impedance of the power receiving unit, and impedance of the highly conductive medium.
    Type: Application
    Filed: August 21, 2013
    Publication date: October 22, 2015
    Applicant: NEC CORPORATION
    Inventors: Masahiro TANOMURA, Shuhei YOSHIDA, Kaoru SHIZUNO, Naoki KOBAYASHI, Hiroshi FUKUDA, Yoshinori HAMA
  • RESONATOR ELEMENT, RESONATOR, OSCILLATOR, ELECTRONIC APPARATUS, PHYSICAL QUANTITY SENSOR, MOBILE OBJECT, AND FREQUENCY ADJUSTMENT METHOD OF RESONATOR ELEMENT
    Publication number: 20150188515
    Abstract: A resonator element includes a base portion, and a vibrating arm which extends from the base portion and on which a weight portion is provided, and the weight portion includes a first weight portion which is disposed on one main surface of a distal end portion of the vibrating arm, and a second weight portion which is disposed on the distal end side with respect to the first weight portion and has a thickness smaller than that of the first weight portion. The vibrating arm transmits an energy beam, and a laser incidence area where incidence of the energy beam to the inside of the vibrating arm is allowed, is disposed in a position of the other main surface on the opposite side of the vibrating arm overlapped with the second weight portion.
    Type: Application
    Filed: December 24, 2014
    Publication date: July 2, 2015
    Inventors: Akinori YAMADA, Shuhei YOSHIDA, Takashi ITO, Keiji NAKAGAWA