Display substrate, method of manufacturing same, and display device

1. A display substrate, comprising:

a light-emitting portion located in a display region of the display substrate;

one or more dams located in a non-display region of the display substrate, the non-display region surrounding the display region, wherein the one or more dams comprises a plurality of dams;

a first stress absorbing portion arranged below at least one dam of the plurality of dams; and

a package layer covering the light-emitting portion and the plurality of dams, wherein the package layer is discontinuous between the plurality of dams and has an opening between adjacent dams of the plurality of dams.

2. The display substrate according to claim 1 , wherein the plurality of dams include two dams, and the first stress absorbing portion is at least arranged below a dam of the two dams farther away from the light-emitting portion.

3. The display substrate according to claim 1 , wherein the first stress absorbing portion includes a groove filled with an organic material.

4. The display substrate according to claim 3 , wherein the organic material is identical with that of the at least one dam of the dams.

5. The display substrate according to claim 3 , wherein a bottom of the groove is located in a base substrate of the display substrate.

6. The display substrate according to claim 1 , further comprising:

a second stress absorbing portion arranged below a pixel define layer in the non-display region.

7. The display substrate according to claim 6 , wherein the second stress absorbing portion includes a groove filled with an organic material.

8. The display substrate according to claim 1 , further comprising: a third stress absorbing portion arranged below a pixel define layer in the display region.

9. The display substrate according to claim 8 , wherein the third stress absorbing portion includes a groove filled with an organic material.

10. The display substrate according to claim 9 , wherein the organic material is identical with that of the pixel define layer.

11. The display substrate according to claim 1 , wherein the package layer includes a first organic package layer and a second organic package layer; and further comprising:

a fourth stress absorbing portion arranged between the first inorganic package layer and the second inorganic package layer.

12. The display substrate according to claim 11 , wherein a material of the fourth stress absorbing portion comprises an organic material.

13. The display substrate according to claim 1 , further comprising: a base substrate and a plurality of insulation layers located on the base substrate, wherein the at least one dam of the plurality of dams is arranged on the plurality of insulation layers, the first stress absorbing portion is arranged in the plurality of insulation layers, and projections of the dam and the first stress absorbing portion at least partially overlap each other in a direction perpendicular to the base substrate.

14. The display substrate according to claim 13 , wherein the first stress absorbing portion includes a plurality of grooves, each of which penetrates the plurality of insulation layers.

15. A display device comprising the display substrate according to claim 1 .

16. A display substrate comprising:

a light emitting portion located in a display region of the display substrate;

one or more dams located in a non-display region of the display substrate, the non-display region surrounding the display region;

a first stress absorbing portion arranged below at least one dam of the dams;

a package layer covering the light-emitting portion and the one or more dams; and

a heat insulation protective layer arranged on the package layer and only in the non-display region.

17. The display substrate according to claim 16 , wherein the heat insulation protective layer is a multi-layer structure.

18. The display substrate according to claim 16 , wherein the heat insulation protective layer includes an inorganic heat insulation material.

19. A method of manufacturing a display substrate, the display substrate comprising a display region and a non-display region surrounding the display region, the method comprising:

arranging a light-emitting portion in the display region;

arranging one or more dams in the non-display region, wherein the one or more dams comprises a plurality of dams;

arranging a first stress absorbing portion below at least one dam of the plurality of dams; and

arranging a package layer covering the light-emitting portion and the plurality of dams, wherein the package layer is discontinuous between the plurality of dams and has an opening between adjacent dams of the plurality of dams.

20. The method according to claim 19 , wherein the first stress absorbing portion includes a groove filled with an organic material, and the first stress absorbing portion is integrated with the dam.