The present disclosure relates to a pixel circuit including a light emitting unit, a processing circuit and a driving circuit. The processing circuit is configured to receive a frame display signal, and is configured to calculate the frame display signal to generate a driving duty cycle corresponding to a driving period according to a driving current value. The driving circuit is electrically connected to the processing circuit and the light emitting unit, and is configured to drive the light emitting unit during the driving period according to the driving duty cycle, the driving current value and a driving frequency.