Patents by Inventor Hiroaki Tokumaru

Hiroaki Tokumaru 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).

  • Power supply unit for an electronic device such as an electronic device having a tuner
    Patent number: 7707440
    Abstract: A power supply unit for an electronic device comprises a three-terminal regulator in a high voltage connection line between a high voltage terminal of a DC power supply circuit and a microcomputer for reducing voltage from the high voltage terminal to a lower first voltage. A low voltage connection line between a low voltage terminal of the power supply circuit and the microcomputer is connected to the high voltage connection line at a connection point on output side of the regulator. In standby mode, voltage from the high voltage terminal, set higher than the first voltage, is reduced by the regulator to the first voltage and supplied to the microcomputer. In power-on mode, voltage from the low voltage terminal, set higher than the first voltage, is applied to the connection point so as to inactivate the regulator and supply the voltage from the low voltage terminal to the microcomputer.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: April 27, 2010
    Assignee: Funai Electric Co., Ltd.
    Inventors: Hiroaki Tokumaru, Atsuhiko Nagamune, Yasuhiko Kawai
  • Power supply unit for an electronic device such as an electronic device having a tuner
    Publication number: 20070177320
    Abstract: A power supply unit for an electronic device comprises a three-terminal regulator in a high voltage connection line between a high voltage terminal of a DC power supply circuit and a microcomputer for reducing voltage from the high voltage terminal to a lower first voltage. A low voltage connection line between a low voltage terminal of the power supply circuit and the microcomputer is connected to the high voltage connection line at a connection point on output side of the regulator. In standby mode, voltage from the high voltage terminal, set higher than the first voltage, is reduced by the regulator to the first voltage and supplied to the microcomputer. In power-on mode, voltage from the low voltage terminal, set higher than the first voltage, is applied to the connection point so as to inactivate the regulator and supply the voltage from the low voltage terminal to the microcomputer.
    Type: Application
    Filed: January 26, 2007
    Publication date: August 2, 2007
    Applicant: Funai Electric Co., Ltd.
    Inventors: Hiroaki Tokumaru, Atsuhiko Nagamune, Yasuhiko Kawai