To ensure uniformity of display regardless of a characteristics difference and temporal deterioration of a light-emitting element. An optical feedback type pixel circuit having a photoelectric transducer therein comprises a capacitor C1 for storing as an electric charge an integral value of the photoelectric current output from the photoelectric transducer; a comparator for changing a level of an output voltage Vout at a timing when a first voltage set according to the electric charge stored in the capacitor C1 reaches a second voltage set according to data supplied through a data line X; and a transistor T2 electrically controlled according to the output voltage Vout from the comparator for making an organic EL element OLED emit light when the first voltage has not reached the second voltage and for making the organic EL element OLED stop emitting the light when the first voltage reaches the second voltage.