Array substrate and display apparatus

An array substrate, comprising a cathode layer extending across a plurality of subpixel regions and an inter-subpixel region;

• wherein the cathode layer comprises a plurality of first ring structures respectively in a plurality of first regions of the inter-subpixel region, a respective first region of the plurality of first regions surrounding a respective subpixel region of the plurality of subpixel regions;
• a first ring structure of the plurality of first ring structures protrudes away from a base substrate, forming a ridge;
• and
• the cathode layer descends from the ridge to form a step, and further descends from the step to form a first groove in the inter-subpixel region.