Toko Kabushiki Kaisha

Takahiro Inokuchi

Masaaki Totsuka

Toshihiro Takahashi

Kachiyasu Satoh

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.

Growing community of inventors

Tsurugashima, Japan

Takahiro Inokuchi