Organic light-emitting diode display device, manufacturing method therefor, and display apparatus

A method of manufacturing an organic light-emitting diode display device, wherein the organic light-emitting diode display device comprises:

• a substrate and a plurality of sub-pixel units arranged on the substrate, the method comprising:
• for each of the plurality of sub-pixel units, forming a first electrode in a region on the substrate corresponding to the sub-pixel unite to be formed, forming a plurality of first grooves arranged in parallel with each other with equal width and equal spacing on a surface of the first electrode away from the substrate, such that a section of the first electrode is serrated, and a depth of the plurality of first grooves is less than a maximum distance from the surface of the first electrode away from the substrate to the substrate;
• forming a light-emitting functional layer on a side of the first electrode away from the substrate;
• forming a second electrode on a side of the light-emitting functional layer away from the first electrode,
• wherein for some of the plurality of sub-pixel units, the plurality of first grooves therein have different widths, and spacings between adjacent two of the plurality of first grooves therein.