Patents by Inventor Takahisa Tajika

Takahisa Tajika 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 saving control method and device in electronic device, and power saving electronic device
    Patent number: 7315097
    Abstract: A power saving control method includes providing a latch circuit that is supplied with current for operation from a power source even if a switch circuit is turned off, so that the switch circuit is controlled to be turned off when the latch circuit is in a latched state and turned on when the latch circuit is in an unlatched state, operating an automatic-reset operation switch so that a power off process in the main load circuit is performed and the latch circuit is turned into the latched state for turning off the switch circuit when the switch circuit is in the ON state, and operating the automatic-reset operation switch so that the latch circuit is turned into the unlatched state for turning on the switch circuit when the switch circuit is in the OFF state.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: January 1, 2008
    Assignee: Fujitsu Limited
    Inventor: Takahisa Tajika
  • Power saving control method and device in electronic device, and power saving electronic device
    Publication number: 20050231870
    Abstract: A power saving control method includes providing a latch circuit that is supplied with current for operation from a power source even if a switch circuit is turned off, so that the switch circuit is controlled to be turned off when the latch circuit is in a latched state and turned on when the latch circuit is in an unlatched state, operating an automatic-reset operation switch so that a power off process in the main load circuit is performed and the latch circuit is turned into the latched state for turning off the switch circuit when the switch circuit is in the ON state, and operating the automatic-reset operation switch so that the latch circuit is turned into the unlatched state for turning on the switch circuit when the switch circuit is in the OFF state.
    Type: Application
    Filed: August 27, 2004
    Publication date: October 20, 2005
    Applicant: FUJITSU LIMITED
    Inventor: Takahisa Tajika
  • Backlight for liquid crystal display
    Patent number: 6469453
    Abstract: A backlight used for a liquid crystal display includes a plurality of light emitting units, and a phase controller for adjusting the phase of the light emitting units. The light emitting units are turned on and off based on pulse signals of a predetermined cycle having an on-period and an off-period. Under the control of the phase controller, the light emitting units are turned on or off with different phases.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: October 22, 2002
    Assignee: Fujitsu Limited
    Inventors: Takahisa Tajika, Masashi Takamatsu, Noriaki Urakawa, Takuji Sasahara, Haruyasu Nishiyama
  • Backlight for liquid crystal display
    Publication number: 20020047556
    Abstract: A backlight used for a liquid crystal display includes a plurality of light emitting units, and a phase controller for adjusting the phase of the light emitting units. The light emitting units are turned on and off based on pulse signals of a predetermined cycle having an on-period and an off-period. Under the control of the phase controller, the light emitting units are turned on or off with different phases.
    Type: Application
    Filed: February 28, 2001
    Publication date: April 25, 2002
    Applicant: FUJITSU LIMITED
    Inventors: Takahisa Tajika, Masashi Takamatsu, Noriaki Urakawa, Takuji Sasahara, Haruyasu Nishiyama