Patents by Inventor Kiyokazu Yamada

Kiyokazu Yamada 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: 20230280813
    Abstract: An electronic card includes an electric storage device, a charging circuit, a wireless communication circuit, a processor, an electronic function circuit, a power management circuit, and a wakeup circuit configured to start the power management circuit upon receiving an external trigger. The power management circuit supplies, after being started by the wakeup circuit, power of the electric storage device to the processor and the electronic function circuit. The processor stores, before the start of wireless communication, an operation state or an output result of the electronic function circuit which is obtained by an operation with power of the electric storage device, and causes, after operation processing of the electronic function circuit, the wireless communication circuit to start the wireless communication.
    Type: Application
    Filed: May 10, 2023
    Publication date: September 7, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Tatsuya HOSOTANI, Kiyokazu YAMADA
  • Publication number: 20220231348
    Abstract: A secondary battery, a wireless charging circuit connected to the secondary battery, an outer casing member that has an outer shape equivalent to an outer shape of a universal battery and accommodates the secondary battery and the wireless changing circuit, and a positive terminal and a negative terminal that are electrically connected to the secondary battery and are provided at positions corresponding to positions of a positive terminal and a negative terminal, respectively, of the universal battery, are provided. The wireless charging circuit includes a power reception protecting circuit that stops power reception at a rectifier circuit in a case where a received voltage exceeds a predetermined voltage range.
    Type: Application
    Filed: April 8, 2022
    Publication date: July 21, 2022
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Tatsuya HOSOTANI, Kiyokazu YAMADA
  • Publication number: 20220231347
    Abstract: A wireless rechargeable solid-state battery module includes a solid-state battery; an internal structure including an internal circuit electrically connected with the battery; positive and negative electrode terminals, each of which is electrically connected with the solid-state battery, is exposed on an outer surface, and is where the positive or negative electrode terminal can be mounted on an electronic circuit board; barrier layers that entirely or partially contain a conductor and isolate the battery and the internal structure from an outside air environment; and a power receiving terminal electrically connected with an external circuit, which includes a power receiving coil coupled with an external electromagnetic or magnetic field, is electrically connected with the internal circuit, and is in an outside of the barrier layers.
    Type: Application
    Filed: April 8, 2022
    Publication date: July 21, 2022
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Kiyokazu YAMADA, Tatsuya HOSOTANI, Tomohiro KATO, Mitsuyoshi NISHIDE
  • Publication number: 20220231539
    Abstract: A wireless rechargeable solid-state battery module includes a solid-state battery; internal structures that are provided with an internal circuit electrically connected with the solid-state battery; a barrier layer that isolates the solid-state battery from an outside air environment; and a positive electrode terminal and a negative electrode terminal each of which is electrically connected with the solid-state battery, is exposed on an outer surface, and is arranged so that the positive electrode terminal or the negative electrode terminal can be mounted on a mounting board. The internal circuit includes a wireless charging circuit that receives power from an outside via an electromagnetic field or a magnetic field produced by power transmission from the outside and controls charging to the solid-state battery.
    Type: Application
    Filed: April 8, 2022
    Publication date: July 21, 2022
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Kiyokazu YAMADA, Tatsuya HOSOTANI, Tomohiro KATO, Mitsuyoshi NISHIDE
  • Publication number: 20220094203
    Abstract: A power receiver includes an outer case shaped to house a secondary battery, a power reception coil member disposed in the outer case, and a circuit board disposed in the outer case. On the circuit board, a power reception circuit electrically connected to a coil conductor of the power reception coil member and a charging circuit configured to charge and discharge the secondary battery are provided. The outer case includes a first outer case member near the power reception coil member and a second outer case member forming the outer case in combination with the first outer case member. The first outer case member has, for example, a flat surface, is disposed nearer to an external power transmission coil than the second outer case member, and has a structure with which the coil conductor of the power reception coil member and the power transmission coil can face each other.
    Type: Application
    Filed: December 1, 2021
    Publication date: March 24, 2022
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Kiyokazu YAMADA, Osamu MIKI, Tatsuya HOSOTANI
  • Publication number: 20210145362
    Abstract: An in-vivo implantable electronic device includes a housing, a power reception coil, and an electronic circuit. The housing is formed of a biocompatible material and forms an internal space sealed. The power reception coil is disposed in the internal space of the housing and receives power by interacting with an electromagnetic field formed by an external electric field or magnetic field, or transmits an electromagnetic wave to the outside. The electronic circuit is disposed in the internal space, is connected to the power reception coil, and performs at least processing of an electric signal. The housing includes a first member in a box shape formed of a biocompatible metal material and having an opening, a second member formed of a biocompatible nonmetal material and having a shape that closes the opening, a packing in an annular shape disposed between the first member and the second member.
    Type: Application
    Filed: January 27, 2021
    Publication date: May 20, 2021
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Tatsuya HOSOTANI, Kiyokazu YAMADA
  • Publication number: 20210152021
    Abstract: An in-vivo implantable medical device includes a housing, an electronic circuit component, a power reception coil, and a magnetic material. The housing is formed of a biocompatible material and forms an internal space. The electronic circuit component is disposed in the internal space. The power reception coil is disposed in the internal space, interacts with an external electromagnetic field to form an electromagnetic resonance field to receive power. At least part of a region of the housing in which the electromagnetic resonance field is formed is formed of a biocompatible nonmetal material.
    Type: Application
    Filed: January 29, 2021
    Publication date: May 20, 2021
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Norikazu SAKAMOTO, Tatsuya HOSOTANI, Kiyokazu YAMADA
  • Patent number: 8036499
    Abstract: Optical waveguides are provided on a substrate, a thin film whose refractive index is optically less than the refractive indices of the optical waveguides is provided on the surface of the substrate, and a surface-acoustic-wave waveguide is arranged on the thin film so as to cross the optical waveguides in a direction oblique thereto. The optical waveguides are not directly influenced by the location of the SAW waveguide and the phase matching condition of the optical waveguides is not changed, whereby the sidelobe characteristic of an optical filter is not degraded by assigning weights to the SAW intensity.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: October 11, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Kiyokazu Yamada
  • Patent number: 7609383
    Abstract: An optical spectrum analyzer detects a light output that is dependent on the frequency of light in a wavelength range of light to be measured. The optical spectrum analyzer includes a waveguide acousto-optic tunable filter including a piezoelectric substrate, optical waveguides, and an IDT, a light source for providing, to the waveguide acousto-optic tunable filter, reference light having a particular wavelength outside the wavelength range, a driving circuit for providing, to the waveguide acousto-optic tunable filter, a high frequency signal for exciting an IDT, and an arithmetic device that, on the basis of the wavelength of selected light when reference light is incident, and an exciting frequency, corrects the wavelength of the selected light, which is obtained from the light to be measured.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: October 27, 2009
    Assignee: Murata Manufacturing Co. Ltd.
    Inventors: Kiyokazu Yamada, Shinji Tanaka, Hideaki Kobayashi
  • Publication number: 20090162002
    Abstract: Optical waveguides are provided on a substrate, a thin film whose refractive index is optically less than the refractive indices of the optical waveguides is provided on the surface of the substrate, and a surface-acoustic-wave waveguide is arranged on the thin film so as to cross the optical waveguides in a direction oblique thereto. The optical waveguides are not directly influenced by the location of the SAW waveguide and the phase matching condition of the optical waveguides is not changed, whereby the sidelobe characteristic of an optical filter is not degraded by assigning weights to the SAW intensity.
    Type: Application
    Filed: March 6, 2009
    Publication date: June 25, 2009
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventor: Kiyokazu YAMADA
  • Publication number: 20080259332
    Abstract: An optical spectrum analyzer detects a light output that is dependent on the frequency of light in a wavelength range of light to be measured. The optical spectrum analyzer includes a waveguide acousto-optic tunable filter including a piezoelectric substrate, optical waveguides, and an IDT, a light source for providing, to the waveguide acousto-optic tunable filter, reference light having a particular wavelength outside the wavelength range, a driving circuit for providing, to the waveguide acousto-optic tunable filter, a high frequency signal for exciting an IDT, and an arithmetic device that, on the basis of the wavelength of selected light when reference light is incident, and an exciting frequency, corrects the wavelength of the selected light, which is obtained from the light to be measured.
    Type: Application
    Filed: July 1, 2008
    Publication date: October 23, 2008
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Kiyokazu Yamada, Shinji Tanaka, Hideaki Kobayashi
  • Patent number: 7343056
    Abstract: An acoustooptic filter 1 having an optical waveguide 3 disposed on an upper surface 2a of an acoustooptic substrate 2, an interdigital electrode 4 which excites a surface wave disposed on the acoustooptic substrate 2, a surface wave waveguide for the surface wave excited by the interdigital electrode 4 extends in substantially the same direction as the optical waveguide, and a mode of the light guided to the optical waveguide 3 is converted by the surface wave. The acoustooptic filter 1 includes a thin-film ridge 5 as a phase match condition changer that changes a phase match condition at a mutual action area by 0.235% or more from a state in which phases are matched, the mutual action area being an area where the surface acoustic wave and the light guided to the optical waveguide 3 act upon each other.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: March 11, 2008
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Kiyokazu Yamada
  • Publication number: 20070147723
    Abstract: An acoustooptic filter 1 having an optical waveguide 3 disposed on an upper surface 2a of an acoustooptic substrate 2, an interdigital electrode 4 which excites a surface wave disposed on the acoustooptic substrate 2, a surface wave waveguide for the surface wave excited by the interdigital electrode 4 extends in substantially the same direction as the optical waveguide, and a mode of the light guided to the optical waveguide 3 is converted by the surface wave. The acoustooptic filter 1 includes a thin-film ridge 5 as a phase match condition changer that changes a phase match condition at a mutual action area by 0.235% or more from a state in which phases are matched, the mutual action area being an area where the surface acoustic wave and the light guided to the optical waveguide 3 act upon each other.
    Type: Application
    Filed: April 22, 2004
    Publication date: June 28, 2007
    Inventor: Kiyokazu Yamada