Display substrate with isolation structure and filling structure, method for manufacturing the same and display device
Provided are a display substrate, a method for manufacturing the display substrate, and a display device. The display substrate has a display area, an opening area being provided in the display area, and the display substrate includes: a base substrate; at least one isolation structure provided on the base substrate and surrounding the opening area, and the isolation structure includes a first sidewall; a first filling structure provided on a side of the first sidewall away from the opening area, the first filling structure includes a second sidewall facing the first sidewall and a third sidewall facing away from the first sidewall; a first inorganic thin film disposed between the isolation structure and the filling structure; and a second inorganic thin film covering the isolation structure and the first filling structure.
1. A display substrate having a display area, an opening area being provided in the display area, wherein the display substrate comprises:
a base substrate;
at least one isolation structure provided on the base substrate and surrounding the opening area, wherein the isolation structure comprises a first sidewall;
a first filling structure provided on a side of the first sidewall away from the opening area, wherein the first filling structure comprises a second sidewall facing the first sidewall and a third sidewall facing away from the first sidewall;
a first inorganic thin film disposed between the isolation structure and the filling structure;
a second inorganic thin film covering the isolation structure and the first filling structure; and
a second filling structure, wherein the first filling structure and the second filling structure are spaced from each other, such that a height of the isolation structure in a direction perpendicular to a direction of the display substrate, and a height of any one of the first filling structure and the second filling structure in the direction perpendicular to the direction of the display substrate are higher than a height of a pixel defining layer in the direction perpendicular to the direction of the display substrate.
2. The display substrate according to claim 1 , further comprising at least one contact portion between the first inorganic thin film and the second inorganic thin film is located between adjacent first filling structure and second filling structure.
3. The display substrate according to claim 2 , wherein the first sidewall comprises a first side and a second side, the second side is closer to the base substrate than the first side, and the first side is further away from the opening area than the second side in a direction parallel to the base substrate; and wherein the second sidewall conforms to a shape of the first sidewall, the third sidewall comprises a third side and a fourth side, the fourth side is closer to the base substrate than the third side, and the third side is closer to the opening area than the fourth side in the direction parallel to the base substrate.
4. The display substrate according to claim 3 , wherein the isolation structure further comprises a fourth sidewall facing the opening area, the fourth sidewall comprises a fifth side and a sixth side, the sixth side is closer to the base substrate than the fifth side, and the fifth side is closer to the opening area than the sixth side in the direction parallel to the base substrate; and wherein the second filling structure comprises a fifth sidewall facing the fourth side wall and a sixth sidewall facing away from the fourth side wall, the fifth sidewall conforms to a shape of the fourth sidewall, the sixth sidewall comprises a seventh side and an eighth side, the eighth side is closer to the base substrate than the seventh side, and the seventh side is further away from the opening area than the eighth side in the direction parallel to the base substrate.
5. The display substrate according to claim 4 , wherein the number of the at least one isolation structure is at least two.
6. The display substrate according to claim 5 , wherein the at least two isolation structures are sequentially arranged around the opening area; and wherein the display substrate further comprises: at least one groove formed between two adjacent isolation structures, and the groove is covered by the first inorganic thin film; and
wherein adjacent isolation structures are isolated by the groove.
7. The display substrate according to claim 5 , wherein the display area comprises the opening area and an effective display area except the opening area; and wherein the display substrate further comprises an array structure layer located in the effective display area.
8. The display substrate according to claim 7 , further comprising a light emitting structure layer; wherein the light emitting structure layer comprises a first portion located in an area surrounded by the at least two isolation structures.
9. The display substrate according to claim 7 , further comprising a light emitting structure layer; wherein the light emitting structure layer comprises a third portion located on a surface of the isolation structure away from the array structure layer.
10. The display substrate according to claim 7 , further comprising a light emitting structure layer; wherein the light emitting structure layer comprises a second portion located on a side close to the effective display area, of one of the at least two isolation structures which is away from the opening area.
11. The display substrate according to claim 7 , wherein the first filling structure is provided on the first side and/or the second side of the isolation structure close to the effective display area in the at least two isolation structures.
12. The display substrate according to claim 1 , further comprising a second filling structure, wherein the first filling structure and the second filling structure are spaced from each other, and the second inorganic thin film spaces the first filling structure from the second filling structure that are adjacent to each other.
13. The display substrate according to claim 1 , wherein a slope angle of a sidewall of any one of the first filling structure and the second filling structure which are configured to carry the second inorganic thin film is an obtuse angle.
14. The display substrate according to claim 1 , wherein a height of each of the first filling structure and the second filling structure is less than or equal to a height of the isolation structure, and the height is a size along a direction perpendicular to the display substrate.
15. The display substrate according to claim 1 , wherein the second inorganic thin film is located on a side of the first inorganic thin film away from the isolation structure.
16. The display substrate according to claim 1 , further comprising an organic protective layer provided on a side of the first sidewall away from opening area.
17. The display substrate according to claim 1 , further comprising an organic protective layer, wherein the organic protective layer, the first filling structure and the second filling structure are disposed on the same layer.
18. A display device, comprising the display substrate according to claim 1 .