Patents by Inventor Kachiyasu Satoh

Kachiyasu Satoh 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).

  • Piezoelectric transformer driving circuit
    Patent number: 6501209
    Abstract: A piezoelectric transformer driving circuit comprises a piezoelectric transformer which boosts an input voltage to obtain a voltage required in igniting a cold cathode tube, a restart circuit which detects the voltage output from said piezoelectric transformer and allows said piezoelectric transformer to repeatedly output a high voltage required in initially igniting said cold cathode tube, a PWM controller which allows said piezoelectric transformer to intermittently output a voltage in order to adjust the brightness of said cold cathode tube, and a stopping unit which stops the control operation of said PWM controller when restart circuit is operative.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: December 31, 2002
    Assignee: Toko Kabushiki Kaisha
    Inventors: Masaaki Totsuka, Kachiyasu Satoh, Takahiro Inokuchi, Toshihiro Takahashi
  • Piezoelectric transformer driving circuit
    Publication number: 20010005107
    Abstract: A piezoelectric transformer driving circuit comprises a piezoelectric transformer which boosts an input voltage to obtain a voltage required in igniting a cold cathode tube, a restart circuit which detects the voltage output from said piezoelectric transformer and allows said piezoelectric transformer to repeatedly output a high voltage required in initially igniting said cold cathode tube, a PWM controller which allows said piezoelectric transformer to intermittently output a voltage in order to adjust the brightness of said cold cathode tube, and a stopping unit which stops the control operation of said PWM controller when restart circuit is operative.
    Type: Application
    Filed: December 22, 2000
    Publication date: June 28, 2001
    Inventors: Masaaki Totsuka, Kachiyasu Satoh, Takahiro Inokuchi, Toshihiro Takahashi