Patents by Inventor Tohru Ibaraki

Tohru Ibaraki 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).

  • Charging control semiconductor integrated circuit and secondary battery charging apparatus using the same
    Patent number: 7705563
    Abstract: A charging control semiconductor integrated circuit used in a charging apparatus for a secondary battery includes first and second terminals. The first terminal is configured to output a control signal to a first charging transistor in the charging apparatus. The second terminal is configured to output a control signal to a second charging transistor in the charging apparatus. Further, the first and second charging transistors are separately controlled on the basis of a voltage across the first charging transistor, a voltage across the second charging transistor, and a voltage of the secondary battery.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: April 27, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Tohru Ibaraki
  • Charging control semiconductor integrated circuit and secondary battery charging apparatus using the same
    Publication number: 20070216357
    Abstract: A charging control semiconductor integrated circuit used in a charging apparatus for a secondary battery includes first and second terminals. The first terminal is configured to output a control signal to a first charging transistor in the charging apparatus. The second terminal is configured to output a control signal to a second charging transistor in the charging apparatus. Further, the first and second charging transistors are separately controlled on the basis of a voltage across the first charging transistor, a voltage across the second charging transistor, and a voltage of the secondary battery.
    Type: Application
    Filed: February 16, 2007
    Publication date: September 20, 2007
    Inventor: Tohru Ibaraki