Patents by Inventor Shouichi Fukutoku

Shouichi Fukutoku 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 control device, backlight unit, and liquid crystal display device
    Patent number: 8890909
    Abstract: Disclosed is a power control device, which generates PWM signals corresponding to obtained voltage signals, and which performs PWM control of power to be supplied to a load. The power control device is provided with a sampling section that performs sampling of the voltage signals, and a duty factor updating section, which updates the duty factor of the PWM signals on the basis of the sampling results. The sampling section is prevented from performing sampling during a masking period which is set as the on-period or the off-period of the PWM signals.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: November 18, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Shouichi Fukutoku
  • POWER CONTROL DEVICE, BACKLIGHT UNIT, AND LIQUID CRYSTAL DISPLAY DEVICE
    Publication number: 20120326628
    Abstract: Disclosed is a power control device, which generates PWM signals corresponding to obtained voltage signals, and which performs PWM control of power to be supplied to a load. The power control device is provided with a sampling section that performs sampling of the voltage signals, and a duty factor updating section, which updates the duty factor of the PWM signals on the basis of the sampling results. The sampling section is prevented from performing sampling during a masking period which is set as the on-period or the off-period of the PWM signals.
    Type: Application
    Filed: December 1, 2010
    Publication date: December 27, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Shouichi Fukutoku