Display panel and display apparatus

1. A display panel comprising:

a substrate comprising:

a front display area, wherein a first display element is in the front display area;

a first side display area connected in a first direction to the front display area;

a second side display area connected in a second direction intersecting the first direction to the front display area;

a corner display area between the first side display area and the second side display area, wherein the corner display area at least partially surrounds the front display area, and a second display element is in the corner display area, and

an intermediate display area between the front display area and the corner display area, wherein a third display element is in the intermediate display area, wherein a groove is defined on the substrate and recessed in a thickness direction of the substrate; and

an inorganic pattern layer on opposing sides of the groove on the substrate,

wherein the inorganic pattern layer comprises a pair of protruding tips protruding toward a center of the groove,

wherein the groove is between the second display element and the third display element, and

wherein at least a portion of the groove extends along a boundary between the corner display area and the intermediate display area.

2. The display panel of claim 1 , wherein

the corner display area comprises a plurality of extension areas extending from the intermediate display area,

wherein a through-portion is defined between adjacent extension areas, and

wherein the second display element is in the plurality of extension areas.

3. The display panel of claim 2 , wherein the groove surrounds the second display element.

4. The display panel of claim 2 , further comprising:

a dam portion over the inorganic pattern layer and protruding in the thickness direction of the substrate,

wherein the dam portion comprises a first dam portion and a second dam portion,

wherein the first dam portion surrounds the second display element, and

the second dam portion extends along the corner display area.

5. The display panel of claim 4 , wherein

each of the plurality of extension areas comprises a first extension area, and a second extension area between the first extension area and the intermediate display area,

wherein the second extension areas of the plurality of extension areas are connected to one another as a single body, and

the groove is located between the first dam portions of adjacent extension areas.

6. The display panel of claim 4 , further comprising:

a first auxiliary dam portion over the inorganic pattern layer between the second display element and the first dam portion, and protruding in the thickness direction of the substrate,

wherein a thickness of the first dam portion is greater than a thickness of the first auxiliary dam portion.

7. The display panel of claim 2 , further comprising:

a planarization layer located on the substrate,

wherein the planarization layer is separated by the groove into a corner planarization layer and an intermediate planarization layer,

wherein the second display element is on the corner planarization layer, and

the third display element is on the intermediate planarization layer.

8. The display panel of claim 2 , wherein

the third display element comprises an inner display element and an outer display element adjacent to the groove,

wherein the outer display element comprises a pixel electrode and a counter electrode, and

wherein the pixel electrode covers at least a part of the inorganic pattern layer.

9. The display panel of claim 2 , further comprising:

a planarization layer between the substrate and the third display element,

wherein the third display element comprises an inner display element and an outer display element adjacent to the groove, and

wherein the planarization layer comprises a recessed portion between the inner display element and the outer display element.

10. The display panel of claim 2 , further comprising:

a connection wiring on the substrate and extending from the intermediate display area to the plurality of extension areas,

wherein the second display element comprises a pixel electrode, an intermediate layer, and a counter electrode, and

wherein the connection wiring and the counter electrode are connected to each other at end portions of the plurality of extension areas.

11. The display panel of claim 10 , further comprising:

a planarization layer located between the connection wiring and the second display element,

wherein a contact hole is defined through the planarization layer to expose the connection wiring, and

wherein the connection wiring and the counter electrode are connected to each other through a pixel electrode pattern in the contact hole.

12. The display panel of claim 2 , further comprising:

a connection wiring on the substrate and extending from the intermediate display area to the plurality of extension areas,

wherein a plurality of second display elements is in one of the plurality of extension areas,

wherein the plurality of second display elements respectively comprise counter electrodes which are spaced apart from one another, and

wherein each of the counter electrodes is connected to the connection wiring.

13. The display panel of claim 2 , wherein

the third display element comprises a pixel electrode and a counter electrode,

wherein the intermediate display area comprises a first intermediate display area and a second intermediate display area located between the first intermediate display area and the corner display area,

the display panel further comprises:

a connection wiring located in the intermediate display area; and

an intermediate groove defined between the first intermediate display area and the second intermediate display area,

wherein each of the counter electrode of the third display element in the first intermediate display area and the counter electrode of the third display element in the second intermediate display area is connected to the connection wiring through a contact hole.

14. The display panel of claim 2 , wherein

the third display element comprises a pixel electrode and a counter electrode, and the third display element is provided in plural in the intermediate display area,

the display panel further comprises:

a connection wiring in the intermediate display area; and

an intermediate groove defined in the intermediate display area to surround each of the plurality of third display elements,

wherein counter electrodes of a plurality of third display elements in the intermediate display area are spaced apart from one another by the intermediate groove and are each connected to the connection wiring.

15. The display panel of claim 1 , wherein

the corner display area comprises: pixel arrangement areas, in each of which the second display element is located; and connection areas which connect the pixel arrangement areas to the intermediate display area,

wherein adjacent pixel arrangement areas and adjacent connection areas define a through-area,

wherein the display panel further comprises a connection wiring extending from the intermediate display area to the pixel arrangement area.

16. The display panel of claim 15 , wherein

the connection areas extend in a serpentine shape from the intermediate display area, and

adjacent connection areas are symmetrically arranged in a direction in which the pixel arrangement areas are spaced apart from one another.

17. The display panel of claim 1 , wherein

the second display element comprises a pixel electrode, an intermediate layer comprising an emission layer and a counter electrode,

the intermediate layer comprises:

a first functional layer between the pixel electrode and the emission layer; and

a second functional layer between the counter electrode and the emission layer,

wherein the counter electrode and at least one selected from the first functional layer and the second functional layer are separated by the pair of protruding tips and the groove.

18. The display panel of claim 1 , further comprising:

a dam portion over the inorganic pattern layer and protruding in the thickness direction of the substrate; and

a thin-film encapsulation layer covering the second display element and the third display element, wherein the thin-film encapsulation layer comprises an inorganic encapsulation layer and an organic encapsulation layer,

wherein the thin-film encapsulation layer extends from the second display element and the third display element to the dam portion, and

the organic encapsulation layer is separated by the dam portion.

19. The display panel of claim 1 , further comprising:

an inorganic insulating layer on the substrate;

a connection wiring on the inorganic insulating layer and extending from the intermediate display area to the corner display area;

a lower inorganic pattern layer on the connection wiring; and

a lower layer covering an edge of the lower inorganic pattern layer, wherein a hole is defined through the lower layer to correspond to the lower inorganic pattern layer,

wherein the groove is defined by the hole and a central portion of the lower inorganic pattern layer.

20. The display panel of claim 1 , further comprising:

an inorganic insulating layer on the substrate;

a connection wiring on the inorganic insulating layer and extending from the intermediate display area to the corner display area;

a lower inorganic layer on the connection wiring; and

a lower layer comprising a first planarization layer and a second planarization layer, wherein a hole is defined through the lower layer to expose a part of the lower inorganic layer is exposed,

wherein the groove is defined by the lower inorganic layer and the hole.

21. The display panel of claim 1 , further comprising:

an inorganic insulating layer on the substrate;

a connection wiring on the inorganic insulating layer and extending from the intermediate display area to the corner display area;

a metal pattern layer on the connection wiring; and

a lower layer covering an edge of the metal pattern layer, wherein a hole is defined through the lower layer to correspond to the metal pattern layer,

wherein the groove is defined by the hole and a central portion of the metal pattern layer.

22. A display apparatus comprising:

a display panel comprising a front display area, a corner display area at a corner of the front display area to be bent, and an intermediate display area between the front display area and the corner display area, wherein a first display element is in the front display area, a second display element is in the corner display area, and a third display element is in the intermediate display area; and

a cover window covering the display panel,

wherein the corner display area comprises a plurality of extension areas extending from the intermediate display area,

wherein the second display element is in the plurality of extension areas, and

wherein the display panel comprises:

a substrate, wherein a groove recessed in a thickness direction of the substrate is defined on the substrate; and

an inorganic pattern layer on opposing sides of the groove and comprising a pair of protruding tips protruding toward a center of the groove,

wherein the groove is between the second display element and the third display element, and

at least a portion of the groove extends along a boundary between the corner display area and the intermediate display area.

23. The display apparatus of claim 22 , wherein

the second display element comprises a pixel electrode, an intermediate layer comprising an emission layer, and a counter electrode,

wherein the intermediate layer comprises a first functional layer between the pixel electrode and the emission layer, and a second functional layer between the counter electrode and the emission layer, and

wherein at least one of the first functional layer and the second functional layer and the counter electrode are separated by the pair of protruding tips and the groove.

24. The display apparatus of claim 22 , wherein the groove surrounds the second display element.

25. The display apparatus of claim 22 , wherein

the display panel further comprises a dam portion over the inorganic pattern layer and protruding in the thickness direction of the substrate,

wherein the dam portion comprises a first dam portion and a second dam portion,

wherein the first dam portion surrounds the second display element, and

the second dam portion extends along the corner display area.

26. The display apparatus of claim 25 , wherein

the display panel further comprises a first auxiliary dam portion over the inorganic pattern layer between the second display element and the first dam portion, and protruding in the thickness direction of the substrate,

wherein a thickness of the first dam portion is greater than a thickness of the first auxiliary dam portion.

27. The display apparatus of claim 22 , wherein the display panel further comprises

a dam portion over the inorganic pattern layer and protruding in the thickness direction of the substrate, and

a thin-film encapsulation layer covering the second display element and the third display element, wherein the thin-film encapsulation layer comprises an inorganic encapsulation layer and an organic encapsulation layer,

wherein the thin-film encapsulation layer extends from the second display element and the third display element to the dam portion,

wherein the organic encapsulation layer is separated by the dam portion.

28. The display apparatus of claim 22 , wherein

the display panel further comprises a connection wiring on the substrate and extending from the intermediate display area to the plurality of extension areas,

wherein the second display element comprises a pixel electrode, an intermediate layer, and a counter electrode,

wherein the connection wiring and the counter electrode are connected to each other at end portions of the plurality of extension areas.

29. The display apparatus of claim 22 , wherein the display panel further comprises a connection wiring on the substrate and extending from the intermediate display area to the plurality of extension areas, Reply to Office Action of Jan. 18, 2023 wherein a plurality of second display elements is in one of the plurality of extension areas, wherein the plurality of second display elements respectively comprise counter electrodes which are spaced apart from one another, wherein each of the counter electrodes is connected to the connection wiring.

30. The display apparatus of claim 22 , wherein the display panel comprises:

a first side display area connected in a first direction to the front display area and bent with a first radius of curvature, and

a second side display area connected in a second direction intersecting the first direction to the front display area and bent with a second radius of curvature different from the first radius of curvature,

wherein the corner display area is between the first side display area and the second side display area.