Dimming method and system thereof

Details Dimming method and system thereof Dimming method and system thereof

2008-05-06

2008-05-06

Tran, Thuy V. (Department: 2821)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S534000, C363S060000, C363S062000, C315S291000

Reexamination Certificate

active

07368977

ABSTRACT:
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.

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