Display panel and display device

1. A display panel, comprising:

a substrate having a display region and a non-display region;

light-emitting units arranged in the display region and located on a side of the substrate;

an organic layer arranged in the display region and located on a side of the light-emitting units facing away from the substrate; and

a carrier layer at least partially arranged in the display region and located between the organic layer and the light-emitting units and in contact with the organic layer,

wherein the display region comprises a first display region and a second display region, and the second display region is located between the first display region and the non-display region, and

wherein the carrier layer comprises at least one first groove in the second display region, a projection of the organic layer on the carrier layer covers the at least one first groove, and the at least one first groove overlaps with none of the light-emitting units in a normal direction of the substrate.

2. The display panel of claim 1 , wherein the at least one first groove comprises at least one first sub-groove, and wherein each of the at least one first sub-groove is an annular groove that surrounds the first display region.

3. The display panel of claim 2 , wherein the at least one sub-groove comprises a plurality of first sub-grooves, wherein each of the plurality of first sub-grooves has a depth gradually increasing at least along a first direction or a width gradually increasing along the first direction, and the first direction is a direction from a center of the display region pointing to the non-display region.

4. The display panel of claim 2 , wherein the at least one first groove comprises a plurality of first sub-grooves, wherein the plurality of first sub-grooves is arranged in a density gradually increasing along a first direction, and wherein the first direction is a direction from a center of the display region pointing to the non-display region.

5. The display panel of claim 1 , wherein the at least one first groove comprises a plurality of second sub-grooves surrounding the first display region and spaced apart from each other, at least two of the plurality of second sub-grooves are arranged along a second direction intersecting with a first direction, and the first direction is a direction from a center of the display region pointing to the non-display region.

6. The display panel of claim 5 , wherein at least two second sub-grooves of the plurality of second sub-grooves are arranged along the second direction to form one of a plurality of second sub-groove groups and do not overlap in the first direction; and two adjacent second sub-groove groups of the plurality of second sub-groove groups overlap with each other in the first direction to form an overlapping portion.

7. The display panel of claim 6 , wherein a number of the plurality of second sub-groove groups is greater than or equal to three, and areas of the overlapping portions of the plurality of second sub-groove groups gradually increase along the first direction.

8. The display panel of claim 6 , wherein each of the plurality of second sub-grooves has a depth gradually increasing at least along the first direction or a width gradually increasing along the first direction.

9. The display panel of claim 5 , wherein the at least one first groove further comprises at least one third sub-groove, and each of the at least one third sub-groove extends along the first direction.

10. The display panel of claim 9 , wherein one of the at least one third sub-groove communicates with one of the plurality of second sub-grooves.

11. The display panel of claim 9 , wherein at least one of a width or a depth of the at least one third sub-groove gradually increases along the first direction.

12. The display panel of claim 9 , wherein the at least one third sub-groove comprises a plurality of third sub-grooves, and at least two of the plurality of third sub-grooves are arranged along the second direction to form one of a plurality of third sub-groove groups.

13. The display panel of claim 12 , wherein a number of the plurality of third sub-groove groups is greater than or equal to two, and two adjacent third sub-groove groups of the plurality of third sub-groove groups are arranged along the first direction and do not overlap in the first direction.

14. The display panel of claim 1 , wherein the carrier layer further comprises at least one fourth sub-groove located in the non-display region, and each of the at least one fourth sub-groove is an annular groove that surrounds the second display region.

15. The display panel of claim 14 , wherein the at least one fourth sub-groove comprises a plurality of fourth sub-grooves, wherein each of the plurality of fourth sub-groove has a width gradually decreasing at least along a first direction or a depth gradually decreasing along the first direction, and the first direction is a direction from a center of the display region pointing to the non-display region.

16. The display panel of claim 14 , wherein the at least one fourth sub-groove comprises a plurality of fourth sub-grooves, wherein the plurality of fourth sub-grooves is arranged in a density gradually decreasing along a first direction, and the first direction is a direction from a center of the display region pointing to the non-display region.

17. The display panel of claim 1 , wherein the carrier layer comprises a light extraction layer having a refractive index smaller than a refractive index of the organic layer;

wherein the light extraction layer has openings corresponding to the light-emitting units and comprises first side surfaces for forming the openings and first bottom surfaces close to the substrate, wherein each of the first side surfaces intersects with one of the first bottom surfaces and forms an angle α 1 with the first bottom surface, where 0<α1<90°; and each of the first side surfaces is configured to adjust light having large angle of view emitted by one of the light-emitting units to light having small angle of view; and

wherein the openings overlaps with none of the at least one first groove in the normal direction of the substrate.

18. The display panel of claim 1 , wherein the carrier layer comprises a first inorganic encapsulation layer, and the display panel further comprises a second inorganic encapsulation layer located on a side of the organic layer facing away from the first inorganic encapsulation layer.

19. The display panel of claim 1 , wherein the carrier layer comprises a black matrix, the organic layer comprises organic sub-layers, wherein each of the organic sub-layers at least partially overlaps with one light-emitting unit of the light-emitting units in the normal direction of the substrate, and wherein each of the organic sub-layers has a color same as a color of light emitted by the one light-emitting unit.

20. A display device, comprising a display panel, wherein the display panel comprises:

a substrate having a display region and a non-display region;

light-emitting units arranged in the display region and located on a side of the substrate;

an organic layer arranged in the display region and located on a side of the light-emitting units facing away from the substrate; and

a carrier layer at least partially arranged in the display region and located between the organic layer and the light-emitting units and in contact with the organic layer,

wherein the display region comprises a first display region and a second display region, and the second display region is located between the first display region and the non-display region, and

wherein the carrier layer comprises at least one first groove in the second display region, a projection of the organic layer on the carrier layer covers the at least one first groove, and the at least one first groove overlaps with none of the light-emitting units in a normal direction of the substrate.