Ultra-low-power display control circuit and associated method

摘要

An ultra-low-power display control circuit (500) and associated method is provided. The ultra-low-power display control circuit (500) comprises a power conversion controller (540), a first capacitor (C1), a transforming device (530), a second capacitor (C2), a regulator (550), an opto-coupler (570) and a display controller (560). The first capacitor (C1) couples to the power conversion controller (540) and the transforming device (530). The transforming device converts the relatively-high voltage to a relatively-low voltage. The second capacitor (C2) stabilizes the relatively-low voltage. The regulator (550) regulates the relatively-low voltage to generate a regulated voltage output. The display controller (560) is powered by the regulated voltage output. The display controller controls the magnitude of a coupling current of the opto-coupler (570) to activate or deactivate the power conversion controller.