Display device, display panel and method of manufacturing the same

A display panel, comprising:

• a drive backplane;
• a first electrode layer, arranged on a surface of the drive backplane, and comprising a plurality of first electrodes distributed in an array, wherein the first electrode comprises a flat middle part and an edge part surrounding the middle part, the edge part comprises a horizontal part surrounding the middle part and a climbing part connected between the middle part and the horizontal part, and a thickness of the horizontal part is smaller than that of the middle part;
• a leakage cut-off layer, comprising a first defining layer and a second defining layer, wherein the first defining layer and the first electrode layer are provided on a same surface of the drive backplane, the first defining layer has a plurality of openings, the first electrodes are arranged in the openings in one-to-one correspondence, a space area exposing the drive backplane is formed between the edge part of each of the first electrodes and a sidewall of the opening where the first electrode is located, the second defining layer covers the first defining layer and the drive backplane located in the space area, and at least partially exposes the middle part of the first electrode, the second defining layer is recessed toward the drive backplane in the space area and an area corresponding to the edge part;
• a light-emitting function layer, at least partially covering the second defining layer and the middle part of the first electrode;
• and
• a second electrode, covering the light-emitting function layer.

A method of manufacturing a display panel, comprising:

• forming a first electrode layer on a surface of a drive backplane, wherein the first electrode layer comprises a plurality of first electrodes distributed in an array, the first electrode comprises a flat middle part and an edge part surrounding the middle part, the edge part comprises a horizontal part surrounding the middle part and a climbing part connected between the middle part and the horizontal part, and a thickness of the horizontal part is smaller than that of the middle part;
• forming a leakage cut-off layer on a surface of the drive backplane where the first electrode layer is provided, wherein the leakage cut-off layer comprises a first defining layer and a second defining layer that are sequentially stacked in a direction facing away from the drive backplane, the first defining layer is provided with first openings exposing the first electrodes in one-to-one correspondence, the second limiting layer is provided with second openings surrounding outside the first openings, an orthographic projection of the second defining layer on the drive backplane and orthographic projections of middle parts of the first electrodes are spaced by intervals, the first defining layer is provided a plurality of annular holes with blind hole structure surrounding the first openings in one-to-one correspondence, and the second defining layer is provided on a surface of the first defining layer facing away from the drive backplane and is located outside the annular holes;
• forming a light-emitting function layer at least partially covering the leakage cut-off layer and the middle part;
• and
• forming a second electrode covering the light-emitting function layer.