Display substrate, display panel, and display device

A display substrate, comprising:

• a first base substrate, wherein a plurality of sub-pixel regions arranged in an array are provided on the first base substrate, a row direction of the array is a first direction, and a column direction of the array is a second direction;
• and
• a reflective layer provided on one side of the first base substrate, wherein a surface of the reflective layer away from the first base substrate is formed to comprise a plurality of first bumps and a plurality of second bumps, and the first bumps have a size greater than that of the second bumps;
• wherein:
• the plurality of first bumps are arranged in a third direction, and at least two adjacent first bumps in the third direction have different sizes;
• and/or
• the plurality of first bumps are arranged in a fourth direction, and at least two adjacent first bumps in the fourth direction have different sizes, wherein any two of the first direction, the second direction, the third direction and the fourth direction intersect each other.