Display substrate and driving method therefor, and display device

A display substrate, comprising:

• a base substrate, comprising a first display area, and a second display area located at least on one side of the first display area, wherein a camera module is installed in the first display area;
• a plurality of light-emitting devices, arranged in an array on the base substrate, wherein the plurality of light-emitting devices comprise:
• a plurality of first light-emitting devices in the first display area, and a plurality of second light-emitting devices in the second display area, and a density of the plurality of first light-emitting devices in the first display area is less than or equal to a density of the plurality of second light-emitting devices in the second display area;
• and
• a plurality of ambient sensors, arranged between a layer where the plurality of light-emitting devices are located and the base substrate, wherein the plurality of ambient sensors are in the first display area, and the plurality of ambient sensors are below at least part of the first light-emitting devices, and an orthographic projection of an ambient sensor of the plurality of ambient sensors on the base substrate completely and entirely covers an orthographic projection of a corresponding first light-emitting device of the plurality of light-emitting devices on the base substrate;
• and the orthographic projection of the ambient sensor of the plurality of ambient sensors on the base substrate is larger than the orthographic projection of the corresponding first light-emitting device of the plurality of light-emitting devices on the base substrate
• wherein each of the plurality of ambient sensors comprises a first transparent electrode and a second transparent electrode, and a layer where the first transparent electrode is located is between a layer where the second transparent electrode is located and the base substrate;
• and
• first transparent electrodes of ambient sensors of the plurality of ambient sensors in a same row are electrically connected, and second transparent electrodes of ambient sensors of the plurality of ambient sensors in at least one row are electrically connected.