A display substrate, comprising: a base substrate; a first sensing layer comprising a plurality of first sensing electrodes extending substantially along a first direction; and a second sensing layer insulated from the first sensing layer and comprising a plurality of second sensing electrodes extending substantially along a second direction; wherein each of the plurality of first sensing electrodes comprises a pair of first sub-electrodes substantially parallel to each other and extending substantially along the first direction, and a plurality of first photoconductive bridges each of which interposed between the pair of first sub-electrodes; and each of the plurality of second sensing electrodes comprises a pair of second sub-electrodes substantially parallel to each other and extending substantially along the second direction, and a plurality of second photoconductive bridges each of which interposed between the pair of second sub-electrodes; the plurality of first sensing electrodes and the plurality of second sensing electrodes cross over each other thereby forming a plurality of intersection regions; and the display substrate further comprises an insulating layer between the first sensing layer and the second sensing layer; wherein the insulating layer comprises a plurality of insulating blocks; and each of the plurality of insulating blocks is at one of the plurality of intersection regions; wherein at least some of the plurality of first photoconductive bridges and at least some of the plurality of second photoconductive bridges are outside the plurality of intersection regions; and orthographic projections of the at least some of the plurality of first photoconductive bridges and the at least some of the plurality of second photoconductive bridges on the base substrate are substantially non-overlapping with orthographic projections of the plurality of insulating blocks on the base substrate. a base substrate; a first sensing layer comprising a plurality of first sensing electrodes extending substantially along a first direction; and a second sensing layer insulated from the first sensing layer and comprising a plurality of second sensing electrodes extending substantially along a second direction; wherein each of the plurality of first sensing electrodes comprises a pair of first sub-electrodes substantially parallel to each other and extending substantially along the first direction, and a plurality of first photoconductive bridges each of which interposed between the pair of first sub-electrodes; and each of the plurality of second sensing electrodes comprises a pair of second sub-electrodes substantially parallel to each other and extending substantially along the second direction, and a plurality of second photoconductive bridges each of which interposed between the pair of second sub-electrodes; the plurality of first sensing electrodes and the plurality of second sensing electrodes cross over each other thereby forming a plurality of intersection regions; and the display substrate further comprises an insulating layer between the first sensing layer and the second sensing layer; wherein the insulating layer comprises a plurality of insulating blocks; and each of the plurality of insulating blocks is at one of the plurality of intersection regions; wherein at least some of the plurality of first photoconductive bridges and at least some of the plurality of second photoconductive bridges are outside the plurality of intersection regions; and orthographic projections of the at least some of the plurality of first photoconductive bridges and the at least some of the plurality of second photoconductive bridges on the base substrate are substantially non-overlapping with orthographic projections of the plurality of insulating blocks on the base substrate.