Patent ID: 8981956
Filing Date: 2015-03-17
Classification: G06F,G08B,H05B

Abstract:
1. An indication control circuit, configured to control a light emitting unit of an electronic device to emit light to indicate a workload of the electronic device, the indication control circuit comprising: a coupling circuit configured to induce a current output by a power input circuit of the electronic device and produce a corresponding induced voltage proportional to the current output by the power input circuit; wherein, the current output by the power input circuit is proportional to the workload of the electronic device; a square wave signal producing circuit connected to the coupling circuit, configured to convert the induced voltage produced by the coupling circuit to a square wave voltage, wherein, an amplitude of the square wave voltage is proportional to the induced voltage; and an integral circuit connected to the square wave signal producing circuit and the light emitting unit of the electronic device, configured to modulate the square wave voltage to produce a sawtooth voltage, and drive the light-emitting unit to emit light by using the sawtooth voltage.