Ambient light sensing circuit and flat panel display including ambient light sensing circuit

摘要

An ambient light sensing circuit includes a photodiode that flows a current in proportion to ambient light, a first storage capacitor that is electrically coupled with the photodiode and is discharged after being charged with a voltage of a first power supply, a second storage capacitor that is electrically coupled with the first storage capacitor and provides a coupling voltage, and a transistor that outputs a current from the first power supply corresponding to the coupling voltage of the first storage capacitor and the second storage capacitor after being electrically coupled with the second storage capacitor.