Display device having light sensing function and pixel circuit driving method

A display device having a light sensing function comprising a plurality of pixel circuits, and each of the pixel circuits comprising:

• a light emitting element having an anode terminal and a cathode terminal;
• a light emitting element driving circuit electrically connected to the light emitting element for driving the light emitting element to emit light during a light emitting period of a light emitting control signal based on the light emitting control signal;
• and
• a switching circuit electrically connected between the anode terminal of the light emitting element and a reference potential, wherein the reference potential is lower than a cathode potential of the cathode terminal of the light emitting element;
• wherein the light emitting element generates a reverse current proportional to light intensity based on a difference between the reference potential and the cathode potential in response to the switching circuit being turned on, and the light emitting element driving circuit adjusts a brightness emitted by the light emitting element based on the reverse current;
• wherein the plurality of pixel circuits comprises a plurality of first pixel circuits and a plurality of second pixel circuits, the plurality of first pixel circuits are disposed in a first row on a display panel, and the plurality of second pixel circuits of the display panel arranged in a plurality of rows different from the first row;
• and
• wherein adjusting the brightness of the light emitting element based on the reverse current comprises collecting the reverse current of the plurality of second pixel circuits and adjusting the brightness of the light emitting element based on the reverse current of the plurality of second pixel circuits.