Patent ID: 8847505

Claim:
An illumination control circuit, coupled between a household electricity input and an illumination lamp, the illumination control circuit comprising: a dimming module, coupled with the household electricity input, and configured for modulating an alternating current input signal from the household electricity input and generating a dimming signal, the dimming signal comprising a plurality of waveform pulses, each of the waveform pulses having a conduction angle which is adjustable; a sample-and-hold circuit, coupled with the dimming module, and configured for continuously sampling the waveform pulses of the dimming signal to obtain an average waveform pulse from sampled waveform pulses; a signal detection circuit, coupled with the sample-and-hold circuit, and configured for extracting the average waveform pulse, the average waveform pulse having an average conduction angle corresponding to the conduction angles of the waveform pulses; and an average power integrator circuit, coupled with the signal detection circuit, and configured for performing integration on the average waveform pulse after sampling, so as to generate a current-controlling signal and transmit the same to the illumination lamp, the current-controlling signal being configured for controlling a driver circuit of the illumination lamp, a driving power of the driver circuit and the average conduction angle having a linear relationship therebetween.