Display substrate, display mother board and display apparatus including hollowed-out region

A display substrate, comprising:

• a base substrate, a light-emitting unit on the base substrate, and an encapsulation layer on a side of the light-emitting unit away from the base substrate,
• wherein the display substrate comprises a display area and a non-display area at a periphery of the display area, a functional layer is arranged on a side of the encapsulation layer away from the base substrate, the functional layer comprises a patterned region in the non-display area, a pattern of the patterned region comprises a hollowed-out region and a filling region, and the hollowed-out region forms an air column;
• and
• wherein the functional layer consists of either a touch control film layer or a color film layer, wherein the touch control film layer comprises a first metal layer, an insulating layer, a second metal layer and a protective layer that are arranged in sequence along a direction away from the base substrate, and the pattern is formed on at least one film layer of:
• the first metal layer, the insulating layer, the second metal layer and the protective layer.