Display substrate and display apparatus

A display substrate, comprising:

• a base substrate;
• a plurality of light-emitting devices arranged on the base substrate in an array;
• a plurality of photosensitive devices arranged on the base substrate in an array, wherein an orthographic projection of each of the plurality of photosensitive devices on the base substrate overlap an orthographic projection of a gap of each of the plurality of light-emitting devices on the base substrate, each of the plurality of photosensitive devices comprises a photoelectric conversion layer, and the photoelectric conversion layer comprises at least one photoelectric conversion part;
• and
• a black matrix on a side, away from the base substrate, of a layer where the light-emitting devices are, wherein an orthographic projection of the black matrix on the base substrate overlaps the orthographic projection of the gap of each of the plurality of light-emitting devices on the base substrate, the black matrix comprises a plurality of openings, and an orthographic projection of each of the plurality of openings on the base substrate overlap an orthographic projection of the photoelectric conversion part on the base substrate;
• and a collimating light-receiving angle θ in any direction determined by the openings and the photoelectric conversion part meets a following relation:
• 0
• °
• ≤
• θ
• ≤
• arctan
• ⁡
• (
• P
• 2
• ⁢
• H
• )
• ;
• wherein
• P is a valley-ridge size of fingerprints, and H is a distance between a contact face of the fingerprints and the display substrate and an end face, away from one side of the base substrate, of the openings.