An active pixel sensor array includes plurality of pixel circuits arranged in multiple rows and one column or multiple rows and multiple columns, each pixel circuit including: photoelectric conversion sub-circuit; resetting sub-circuit for resetting photoelectric conversion sub-circuit based on reset signal; source following sub-circuit connected between resetting sub-circuit and photoelectric conversion sub-circuit; strobing sub-circuit connected to source following sub-circuit and for switching on/off state based on strobe signal; and pre-discharging sub-circuit with one terminal connected between source following sub-circuit and strobing sub-circuit, and for switching on/off state based on received pre-discharge signal; when pixel circuits are arranged in multiple rows and columns, on time and off time of strobing sub-circuit in same row are same, and on time of strobing sub-circuit in each row is same as that of pre-discharging sub-circuit in next row, and off time of strobing sub-circuit is same as that of pre-discharging sub-circuit in next row.