A display panel includes a display substrate, and the display substrate includes: a base substrate, and a thin film transistor array and a light-emitting unit located on the base substrate; one or more photoelectric sensors located on a side of the light-emitting units away from the base substrate; one or more switching thin film transistors connected to the photoelectric sensors; and one or more collimating structures provided on a light incident side of the photoelectric sensors. And an orthographic projection of the photoelectric sensor on the base substrate is located within a gap between adjacent light-emitting units.