Display substrate, display panel and display device

A display substrate, comprising:

• a base substrate, a semiconductor layer, a first conductive layer and a second conductive layer, the second conductive layer being on a side of the first conductive layer away from the base substrate,
• wherein the display substrate further comprises a plurality of sub-pixels, and an nth sub-pixel of the plurality of sub-pixels comprises:
• a transmissive section and a reflective section outside the transmissive section;
• wherein the nth sub-pixel further comprises:
• a storage capacitor and a switching transistor that are arranged in the reflective section;
• wherein the storage capacitor comprises:
• a first electrode plate, a second electrode plate and a third electrode plate, the first electrode plate is in the first conductive layer, the second electrode plate is in the second conductive layer, the third electrode plate is on a side of the second conductive layer away from the base substrate, the first electrode plate is electrically connected to the third electrode plate, the second electrode plate is electrically connected to the switching transistor, and each of the first electrode plate and the third electrode plate is insulated and spaced apart from the second electrode plate;
• wherein the switching transistor comprises an active portion arranged in the semiconductor layer;
• wherein an orthographic projection of the first electrode plate on the base substrate overlaps with an orthographic projection of the second electrode plate on the base substrate, and the orthographic projection of the second electrode plate on the base substrate overlaps with an orthographic projection of the third electrode plate on the base substrate;
• wherein an orthographic projection of the active portion on the base substrate is spaced apart from the orthographic projection of the third electrode plate on the base substrate, and the active portion has substantially a same thickness as the third electrode plate;
• wherein n is a positive integer;
• wherein the display substrate further comprises a transparent conductive layer and a first insulating layer, the transparent conductive layer is on a side of the second conductive layer away from the base substrate, and the first insulating layer is between the second conductive layer and the transparent conductive layer;
• the third electrode plate is in the transparent conductive layer, and the nth sub-pixel further comprises a transparent conductive portion in the transparent conductive layer, and the transparent conductive portion is insulated and spaced apart from the third electrode plate;
• the transparent conductive portion comprises a first sub-portion and a second sub-portion, and the first sub-portion and the second sub-portion are electrically connected;
• the first insulating layer is provided with a first via hole passing through the first insulating layer, the first sub-portion is in the transmissive section, the second sub-portion is in the reflective section, an orthographic projection of the second sub-portion on the base substrate and the orthographic projection of the second electrode plate on the base substrate have an overlapping area, and the second sub-portion and the second electrode plate are electrically connected through the first via hole in the overlapping area;
• and
• the first electrode plate comprises a third sub-portion, an orthographic projection of the third sub-portion on the base substrate at least partially surrounds an orthographic projection of the first via hole on the base substrate, a part of the orthographic projection of the third sub-portion on the base substrate overlaps with the orthographic projection of the second sub-portion on the base substrate, and another part of the orthographic projection of the third sub-portion on the base substrate is spaced apart from the orthographic projection of the second sub-portion on the base substrate.