Patents by Inventor Takuro Akiyama

Takuro Akiyama 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).

  • Light emitting element driver and display device
    Publication number: 20110285685
    Abstract: Disclosed herein is a light-emitting element driver including: a light-emitting section; a power supply section; a switching section; a constant current circuit or resistor; and a control circuit.
    Type: Application
    Filed: March 7, 2011
    Publication date: November 24, 2011
    Applicant: Sony Corporation
    Inventors: Takahiro Naito, Tatsuki Nishino, Takuro Akiyama, Yasushi Katayama
  • Power amplifier apparatus and DC component removing method
    Patent number: 7315209
    Abstract: A power amplifier apparatus includes a dither superimposing unit superimposing DC dither on a digital signal; a switching signal generating unit converting the digital signal on which the DC dither is superimposed by the dither superimposing unit to a pair of drive pulses on high and low sides having opposite levels; and a cancel signal generating unit generating a cancel signal to cancel a DC component caused by the DC dither by changing a ratio of pulse widths of the drive pulses on the high and low sides generated by the switching signal generating unit.
    Type: Grant
    Filed: July 21, 2005
    Date of Patent: January 1, 2008
    Assignee: Sony Corporation
    Inventors: Takuro Akiyama, Toshihiko Masuda
  • Power amplifier apparatus and DC component removing method
    Publication number: 20060022752
    Abstract: A power amplifier apparatus includes a dither superimposing unit superimposing DC dither on a digital signal; a switching signal generating unit converting the digital signal on which the DC dither is superimposed by the dither superimposing unit to a pair of drive pulses on high and low sides having opposite levels; and a cancel signal generating unit generating a cancel signal to cancel a DC component caused by the DC dither by changing a ratio of pulse widths of the drive pulses on the high and low sides generated by the switching signal generating unit.
    Type: Application
    Filed: July 21, 2005
    Publication date: February 2, 2006
    Applicant: Sony Corporation
    Inventors: Takuro Akiyama, Toshihiko Masuda