Display substrate and method for manufacturing the same, and display apparatus

A method for manufacturing a display substrate, the method comprising:

• providing a base, wherein the base includes first sub-pixel regions, second sub-pixel regions, third sub-pixel regions, and a light-transmissive region located between a first sub-pixel region in the first sub-pixel regions, a second sub-pixel region in the second sub-pixel regions and a third sub-pixel region in the third sub-pixel regions;
• forming a light-emitting device layer on the base, wherein the light-emitting device layer includes first light-emitting devices, second light-emitting devices and third light-emitting devices;
• a first light-emitting device in the first light-emitting devices is located in the first sub-pixel region, a second light-emitting device in the second light-emitting devices is located in the second sub-pixel region, and a third light-emitting device in the third light-emitting devices is located in the third sub-pixel region;
• and
• forming a light extraction layer on a side of the light-emitting device layer away from the base, wherein the light extraction layer includes first light extraction portions, second light extraction portions and third light extraction portions;
• a first light extraction portion in the first light extraction portions is located in the first sub-pixel region, a second light extraction portion in the second light extraction portions is located in the second sub-pixel region, and a third light extraction portion in the third light extraction portions is located in the third sub-pixel region;
• at least two of the first light extraction portion, the second light extraction portion and the third light extraction portion have different dimensions in a thickness direction of the base;
• wherein two sub-pixel regions displaying a same color are adjacently arranged, and the base further includes a light-transmissive region located between the two sub-pixel regions that are adjacently arranged;
• one of the first light extraction portion, the second light extraction portion and the third light extraction portion covers the two sub-pixel regions displaying the same color and the light-transmissive region located between the two sub-pixel regions displaying the same color.