Patents by Inventor Kenpei En

Kenpei En 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).

  • Method for driving a light-emitting unit and circuit therefor
    Patent number: 9220137
    Abstract: A driver circuit is provided which comprises a series-connected unit having a light-emitting element and a current limiting inductor directly connected to the light-emitting element, a regenerative diode which is connected in parallel to the series-connected unit and which regenerates energy stored in the current limiting inductor, a transistor which controls a current flowing through the light-emitting element and the current limiting inductor, and a controller which controls an operation of the transistor, wherein the controller controls the transistor according to a voltage value of a power supply applied to the light-emitting element.
    Type: Grant
    Filed: March 2, 2014
    Date of Patent: December 22, 2015
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Yoshio Fujimura, Hiroshi Iizuka, Kazunari Kushiyama, Koudai Nakamura, Yuusuke Nishizaki, Kenpei En
  • METHOD FOR DRIVING A LIGHT-EMITTING UNIT AND CIRCUIT THEREFOR
    Publication number: 20140175994
    Abstract: A driver circuit is provided which comprises a series-connected unit having a light-emitting element and a current limiting inductor directly connected to the light-emitting element, a regenerative diode which is connected in parallel to the series-connected unit and which regenerates energy stored in the current limiting inductor, a transistor which controls a current flowing through the light-emitting element and the current limiting inductor, and a controller which controls an operation of the transistor, wherein the controller controls the transistor according to a voltage value of a power supply applied to the light-emitting element.
    Type: Application
    Filed: March 2, 2014
    Publication date: June 26, 2014
    Applicant: Semiconductor Components Industries, LLC
    Inventors: Yoshio Fujimura, Hiroshi Iizuka, Kazunari Kushiyama, Koudai Nakamura, Yuusuke Nishizaki, Kenpei En
  • Driver circuit of light-emitting element
    Patent number: 8665922
    Abstract: A driver circuit is provided which comprises a series-connected unit having a light-emitting element and a current limiting inductor directly connected to the light-emitting element, a regenerative diode which is connected in parallel to the series-connected unit and which regenerates energy stored in the current limiting inductor, a transistor which controls a current flowing through the light-emitting element and the current limiting inductor, and a controller which controls an operation of the transistor, wherein the controller controls the transistor according to a voltage value of a power supply applied to the light-emitting element.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: March 4, 2014
    Assignees: Sanyo Electric Co., Ltd., Sanyo Semiconductor Co., Ltd.
    Inventors: Yoshio Fujimura, Hiroshi Iizuka, Kazunari Kushiyama, Koudai Nakamura, Yuusuke Nishizaki, Kenpei En
  • DRIVER CIRCUIT OF LIGHT-EMITTING ELEMENT
    Publication number: 20100111123
    Abstract: A driver circuit is provided which comprises a series-connected unit having a light-emitting element and a current limiting inductor directly connected to the light-emitting element, a regenerative diode which is connected in parallel to the series-connected unit and which regenerates energy stored in the current limiting inductor, a transistor which controls a current flowing through the light-emitting element and the current limiting inductor, and a controller which controls an operation of the transistor, wherein the controller controls the transistor according to a voltage value of a power supply applied to the light-emitting element.
    Type: Application
    Filed: October 28, 2009
    Publication date: May 6, 2010
    Applicants: SANYO ELECTRIC CO., LTD., SANYO SEMICONDUCTOR CO., LTD.
    Inventors: Yoshio Fujimura, Hiroshi Iizuka, Kazunari Kushiyama, Koudai Nakamura, Yuusuke Nishizaki, Kenpei En