Patents by Inventor Kotaro Shibata

Kotaro Shibata 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: 20240056073
    Abstract: A semiconductor device includes first semiconductor elements, a control terminal, a first conductive member, and first circuit components. The first semiconductor elements are connected in parallel, and a switching operation of each first semiconductor element is controlled according to a first drive signal inputted to a third electrode of each first semiconductor element. The first conductive member is electrically connected to the control terminal to which the first drive signal is inputted, and is electrically interposed between the third electrodes. The first conductive member includes connecting members and a portion of a signal wiring section. Each of the first circuit components increases an impedance in a first frequency band. The first frequency band includes a resonance frequency of a resonance circuit that is formed by including a parasitic inductance of the first conductive member.
    Type: Application
    Filed: October 26, 2023
    Publication date: February 15, 2024
    Inventors: Kotaro SHIBATA, Masaaki MATSUO
  • Publication number: 20240047367
    Abstract: A semiconductor device includes: a plurality of first semiconductor elements that each have a first electrode, a second electrode, and a third electrode, a switching operation of each of the first semiconductor elements being controlled according to a first drive signal inputted to the third electrode; a plurality of first connecting members respectively bonded to the second electrodes of the first semiconductor elements; a first detection terminal electrically connected to the second electrodes of the first semiconductor elements; and a first signal wiring section electrically interposed between the first detection terminal and the first connecting members. The first semiconductor elements are aligned in a first direction perpendicular to a thickness direction of each of the first semiconductor elements, and are electrically connected to each other in parallel.
    Type: Application
    Filed: October 20, 2023
    Publication date: February 8, 2024
    Inventors: Kotaro SHIBATA, Masaaki MATSUO
  • Publication number: 20240038734
    Abstract: A semiconductor device includes semiconductor elements. Each semiconductor element, including first, second and third electrodes, is controlled to turn on and off current flow between the first electrode and the second electrode by drive signals inputted to the third electrode. The first electrodes of the semiconductor elements are electrically connected mutually, and the second electrodes of the semiconductor elements are electrically connected mutually. The semiconductor device further includes a control terminal receiving the drive signals, a first wiring section connected to the control terminal, a second wiring section, and third wiring sections, and further a first connecting member electrically connecting the first and the second wiring sections, a second connecting member electrically connecting the second wiring section and each third wiring section, and third connecting members connecting the third wiring sections and the third electrodes of the semiconductor elements.
    Type: Application
    Filed: January 7, 2022
    Publication date: February 1, 2024
    Inventor: Kotaro SHIBATA
  • Patent number: 9420659
    Abstract: An LED power supply device disclosed in the present specification includes a DC dimmer circuit that performs dimming control of an LED such that the higher a reference voltage variably controlled according to a dimmer signal is, the smaller a current flowing in the LED is. This configuration makes it possible to achieve fine dimming control.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: August 16, 2016
    Assignee: Rohm Co., Ltd.
    Inventors: Kotaro Shibata, Akinobu Sawada
  • Publication number: 20160150613
    Abstract: An LED power supply device disclosed in the present specification includes a DC dimmer circuit that performs dimming control of an LED such that the higher a reference voltage variably controlled according to a dimmer signal is, the smaller a current flowing in the LED is. This configuration makes it possible to achieve fine dimming control.
    Type: Application
    Filed: January 19, 2016
    Publication date: May 26, 2016
    Inventors: Kotaro Shibata, Akinobu Sawada
  • Patent number: 9271365
    Abstract: An LED power supply device disclosed in the present specification includes a DC dimmer circuit that performs dimming control of an LED such that the higher a reference voltage variably controlled according to a dimmer signal is, the smaller a current flowing in the LED is. This configuration makes it possible to achieve fine dimming control.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: February 23, 2016
    Assignee: Rohm Co., Ltd.
    Inventors: Kotaro Shibata, Akinobu Sawada
  • Publication number: 20150137687
    Abstract: An LED power supply device disclosed in the present specification includes a DC dimmer circuit that performs dimming control of an LED such that the higher a reference voltage variably controlled according to a dimmer signal is, the smaller a current flowing in the LED is. This configuration makes it possible to achieve fine dimming control.
    Type: Application
    Filed: September 29, 2014
    Publication date: May 21, 2015
    Inventors: Kotaro Shibata, Akinobu Sawada
  • Patent number: D927437
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: August 10, 2021
    Assignee: ROHM CO., LTD.
    Inventors: Kotaro Shibata, Hideki Sawada
  • Patent number: D934188
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: October 26, 2021
    Assignee: ROHM CO., LTD.
    Inventors: Kotaro Shibata, Hideki Sawada
  • Patent number: D934189
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: October 26, 2021
    Assignee: ROHM CO., LTD.
    Inventors: Kotaro Shibata, Hideki Sawada
  • Patent number: D934190
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: October 26, 2021
    Assignee: ROHM CO., LTD.
    Inventors: Kotaro Shibata, Hideki Sawada
  • Patent number: D934822
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: November 2, 2021
    Assignee: ROHM CO., LTD.
    Inventors: Kotaro Shibata, Hideki Sawada
  • Patent number: D969761
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: November 15, 2022
    Assignee: ROHM CO., LTD.
    Inventors: Kotaro Shibata, Hideki Sawada
  • Patent number: D981354
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: March 21, 2023
    Assignee: ROHM CO., LTD.
    Inventors: Kotaro Shibata, Hideki Sawada
  • Patent number: D981355
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: March 21, 2023
    Assignee: ROHM CO., LTD.
    Inventors: Kotaro Shibata, Hideki Sawada