Electroluminescent display panel and brightness compensation method therefor

An electroluminescent display panel, comprising:

• a plurality of pixel units, wherein each of the plurality of pixel units comprises a plurality of light-emitting structures of different colors;
• photoelectric detectors arranged corresponding to at least part of the light-emitting structures;
• and
• control signal lines and detection signal lines connected with the photoelectric detectors;
• wherein the photoelectric detectors each is configured to convert light emitted by a corresponding illuminated light-emitting structure into electric signal under control of a signal of a control signal line, and to output the electric signal to a detection signal line;
• wherein the photoelectric detector comprises a vertical phototransistor;
• wherein a gate of the vertical phototransistor is electrically connected with the control signal line, a source of the vertical phototransistor is electrically connected with a high-voltage power line in the electroluminescent display panel, and a drain of the vertical phototransistor is electrically connected with the detection signal line;
• wherein the electroluminescent display panel further comprises:
• a reflective layer arranged corresponding to the photoelectric detector;
• wherein the reflective layer is configured to reflect the light emitted by the corresponding illuminated light-emitting structure onto the photoelectric detector;
• orthographic projection of the reflective layer on the electroluminescent display panel does not overlap with either orthographic projection of the corresponding photoelectric detector on the electroluminescent display panel or orthographic projection of the corresponding light-emitting structure on the electroluminescent display panel, and is located between the orthographic projection of the corresponding photoelectric detector on the electroluminescent display panel and the orthographic projection of the corresponding light-emitting structure on the electroluminescent display panel.