Richtek Technology Corporation

Chin-Tsung Chen

Tsung-Wei Huang

Shui-Mu Lin

Wei-Hsin Wei

Chien-Sheng Chen

Chin-Chiang Yeh

A dimming method for LED driving circuit is proposed. By temporary switching a pin that is originally used for the input/output of other electric signals to a high impedance node, the dimming control signal may be inputted to dim LEDs. The dimming method comprises the steps of: floating the pin every a period of time to pull the pin's voltage being equal to the dimming control signal; detecting the pin's voltage; and retrieving the dimming control signal in accordance with the detected pin's voltage and thereafter dimming the LEDs.

Growing community of inventors

Taipei, Taiwan

Chin-Tsung Chen