Patents by Inventor Sayako HAMAGUCHI

Sayako HAMAGUCHI 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).

  • Wireless power transmission apparatus and control method for the same
    Patent number: 10686334
    Abstract: A controller controls an inverter. A signal level detection circuit generates a detection value SDET that corresponds to a voltage at a connection node that connects a series resonance capacitor and multiple transmission coils. The controller (i) drives the inverter 204 while sequentially selecting the multiple transmission coils, and acquires the detection value SDET from the signal level detection circuit. Furthermore, the controller (ii) determines a single transmission coil to be used for power supply, based on comparison results of the detection values SDET acquired for each transmission coil.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: June 16, 2020
    Assignee: ROHM CO., LTD.
    Inventors: Naoki Inoue, Sayako Hamaguchi, Xun He
  • Wireless power transmission apparatus and control method for the same
    Patent number: 10658881
    Abstract: First, a power receiving apparatus RX is detected (S100). Subsequently, a pre digital ping is sent according to a first method (S112). Upon reception of an unique signal defined for the first method from the power receiving apparatus RX (YES in S114), tentative judgment is made that the power receiving apparatus RX supports the first method, and the flow transits to a final judgment operation (S120). When such an unique signal has not been received (NO in S114), tentative judgment is made that the power receiving apparatus RX supports a second method, and the flow transits to a final judgment operation (S130).
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: May 19, 2020
    Assignee: ROHM CO., LTD.
    Inventors: Sayako Hamaguchi, Xun He, Naoki Inoue
  • WIRELESS POWER TRANSMISSION APPARATUS AND CONTROL METHOD FOR THE SAME
    Publication number: 20180131243
    Abstract: First, a power receiving apparatus RX is detected (S100). Subsequently, a pre digital ping is sent according to a first method (S112). Upon reception of an unique signal defined for the first method from the power receiving apparatus RX (YES in S114), tentative judgment is made that the power receiving apparatus RX supports the first method, and the flow transits to a final judgment operation (S120). When such an unique signal has not been received (NO in S114), tentative judgment is made that the power receiving apparatus RX supports a second method, and the flow transits to a final judgment operation (S130).
    Type: Application
    Filed: November 8, 2017
    Publication date: May 10, 2018
    Inventors: Sayako HAMAGUCHI, Xun HE, Naoki INOUE
  • WIRELESS POWER TRANSMISSION APPARATUS AND CONTROL METHOD FOR THE SAME
    Publication number: 20180131235
    Abstract: A controller controls an inverter. A signal level detection circuit generates a detection value SDET that corresponds to a voltage at a connection node that connects a series resonance capacitor and multiple transmission coils. The controller (i) drives the inverter 204 while sequentially selecting the multiple transmission coils, and acquires the detection value SDET from the signal level detection circuit. Furthermore, the controller (ii) determines a single transmission coil to be used for power supply, based on comparison results of the detection values SDET acquired for each transmission coil.
    Type: Application
    Filed: November 8, 2017
    Publication date: May 10, 2018
    Inventors: Naoki INOUE, Sayako HAMAGUCHI, Xun HE