Patents by Inventor Masakazu Segawa

Masakazu Segawa 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).

  • LED backlight drive
    Patent number: 8339355
    Abstract: An LED backlight drive for driving an LED backlight having a plurality of LED lines L1-L3 connected in parallel to a power feed line S4, each of the LED lines having an arbitrary number of LEDs connected in series, the LED backlight drive including: an arithmetic section 12 for calculating a delay time from driving one of the plurality of LED lines L1-L3 to driving the next LED line; a signal generator 13 for generating a plurality of control signals successively at intervals corresponding to the delay time calculated by the arithmetic section; and a driver 14 for driving the plurality of LED lines successively in response to the plurality of control signals generated by the signal generator.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: December 25, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masakazu Segawa, Mikio Araki
  • LED BACKLIGHT DRIVE
    Publication number: 20100283720
    Abstract: An LED backlight drive for driving an LED backlight having a plurality of LED lines L1-L3 connected in parallel to a power feed line S4, each of the LED lines having an arbitrary number of LEDs connected in series, the LED backlight drive including: an arithmetic section 12 for calculating a delay time from driving one of the plurality of LED lines L1-L3 to driving the next LED line; a signal generator 13 for generating a plurality of control signals successively at intervals corresponding to the delay time calculated by the arithmetic section; and a driver 14 for driving the plurality of LED lines successively in response to the plurality of control signals generated by the signal generator.
    Type: Application
    Filed: January 26, 2009
    Publication date: November 11, 2010
    Inventors: Masakazu Segawa, Mikio Araki