Display panel and display apparatus

1. A display panel comprising a first display region, a second display region, and a third display region, wherein the second display region is located between the first display region and the third display region, a light transmittance of the first display region is greater than a light transmittance of the third display region, and the display panel comprises:

a plurality of first sub-pixels distributed in the first display region;

a plurality of second sub-pixel groups distributed in the second display region, wherein the second sub-pixel group comprises a plurality of second sub-pixels;

a plurality of third sub-pixels distributed in the third display region, wherein a distribution density of the plurality of third sub-pixels is greater than a distribution density of the plurality of first sub-pixels,

wherein a total area of orthographic projections of the plurality of second sub-pixels of the second sub-pixel group in a thickness direction of the display panel is equal to an area of an orthographic projection of a single first sub-pixel in the thickness direction of the display panel, the single first sub-pixel emits a same color with the plurality of second sub-pixels of the second sub-pixel group.

2. The display panel according to claim 1 , wherein

a second pixel arrangement structure formed by the plurality of second sub-pixels is the same as a third pixel arrangement structure formed by the plurality of third sub-pixels; and/or

a second sub-pixel group arrangement structure formed by the plurality of second sub-pixel groups is the same as a first pixel arrangement structure formed by the plurality of first sub-pixels.

3. The display panel according to claim 1 , wherein an area of an orthographic projection of the single first sub-pixel in the thickness direction of the display panel is equal to an area of an orthographic projection of a single third sub-pixel in the thickness direction of the display panel.

4. The display panel according to claim 1 , wherein

in a unit area, the number of the second sub-pixels is equal to the number of the third sub-pixels; and/or,

in a unit area, the number of the second sub-pixel groups is equal to the number of the first sub-pixels.

5. The display panel according to claim 1 , wherein the second display region comprises a plurality of adjacent regions sequentially distributed along a direction from the first display region to the second display region, the plurality of adjacent regions comprise a first adjacent region and a second adjacent region, the second adjacent region is arranged adjacent to the third display region, and the first adjacent region is located at a side of the second adjacent region facing to the first display region;

the plurality of second sub-pixels of the second sub-pixel group comprise at least one main sub-pixel and at least one secondary sub-pixel, and an area of an orthographic projection in the thickness direction of a secondary sub-pixel in the adjacent region close to the third sub-pixels is greater than an area of an orthographic projection in the thickness direction of a secondary sub-pixel in the adjacent region close to the first sub-pixels.

6. The display panel according to claim 5 , wherein an area of an orthographic projection in the thickness direction of the main sub-pixel in the first adjacent region is greater than an area of an orthographic projection in the thickness direction of the main sub-pixel in the second adjacent region.

7. The display panel according to claim 5 , wherein the second sub-pixel group comprises one main sub-pixel.

8. The display panel according to claim 7 , wherein a main pixel arrangement structure formed by a plurality of main sub-pixels is the same as a first pixel arrangement structure formed by the plurality of first sub-pixels.

9. The display panel according to claim 7 , wherein the second sub-pixel group comprises two or more secondary sub-pixels, and areas of orthographic projections of the two or more secondary sub-pixels in the thickness direction of the display panel are the same.

10. The display panel according to claim 5 , wherein the number of the third sub-pixels distributed in a unit area is n times of the number of the first sub-pixels distributed in the unit area, and the number of the second sub-pixels in the second sub-pixel group is n.

11. The display panel according to claim 10 , wherein in the second adjacent region, an area of an orthographic projection of the main sub-pixel in the thickness direction of the display panel is equal to an area of an orthographic projection of the secondary sub-pixel in the thickness direction of the display panel.

12. The display panel according to claim 10 , wherein the number of the adjacent regions is m, and m is a positive integer;

the first adjacent region is adjacent to the first display region, and an area of an orthographic projection in the thickness direction of the secondary sub-pixel in the first adjacent region is 1/mn of an area of an orthographic projection of the first sub-pixel in the thickness direction; and/or

a difference between two areas of two orthographic projections of two secondary sub-pixels in the thickness direction of the display panel is 1/mn of an area of an orthographic projection of the first sub-pixel in the thickness direction of the display panel, wherein the two secondary sub-pixels are respectively located in two adjacent regions which are adjacent to each other.

13. The display panel according to claim 1 , wherein the display panel comprises:

a substrate;

a pixel definition layer located on the substrate, wherein the pixel definition layer comprises a plurality of first pixel openings in the first display region and a plurality of second pixel openings in the second display region,

each of the first sub-pixels comprises a first light-emitting structure located in the first pixel opening, a first electrode located on a side of the first light-emitting structure facing to the substrate, and a second electrode located on a side of the first light-emitting structure away from the substrate;

each of the second sub-pixels comprises a second light-emitting structure located in the second pixel opening, a third electrode located on a side of the second light-emitting structure facing to the substrate, and a fourth electrode located on a side of the second light-emitting structure away from the substrate.

14. The display panel according to claim 13 , wherein third electrodes of the plurality of second sub-pixels in the second sub-pixel group are connected.

15. The display panel according to claim 13 , wherein

an orthographic projection of each first light-emitting structure on the substrate comprises a first graphic unit or at least two first graphic units spliced together, and the first graphic unit comprises at least one selected from a group consisting of a circle shape, an ellipse shape, a dumbbell shape, a gourd shape, and a rectangle shape; and/or

an orthographic projection of each second light-emitting structure on the substrate comprises a third graphic unit or at least two third graphic units spliced together, and the third graphic unit comprises at least one selected from a group consisting of a circle shape, an ellipse shape, a dumbbell shape, a gourd shape, and a rectangle shape.

16. The display panel according to claim 13 , wherein an orthographic projection of each first electrode on the substrate comprises a second graphic unit or at least two second graphic units spliced together, and the second graphic unit comprises at least one selected from a group consisting of a circle shape, an ellipse shape, a dumbbell shape, a gourd shape, and a rectangle shape; and/or

an orthographic projection of each third electrode on the substrate comprises a fourth graphic unit or at least two fourth graphic units spliced together, and the fourth graphic unit comprises at least one selected from a group consisting of a circle shape, an ellipse shape, a dumbbell shape, a gourd shape, and a rectangle shape.

17. The display panel according to claim 1 , wherein the display panel further comprises a plurality of second pixel circuits for driving the second sub-pixels to display, and the plurality of second sub-pixels in a same second sub-pixel group are driven by a same second pixel circuit.

18. The display panel according to claim 17 , wherein the display panel further comprises a plurality of first pixel circuits for driving the first sub-pixels to display, the first sub-pixels and the second sub-pixel groups have the same color, and the first pixel circuits and the second pixel circuits are the same.

19. A display apparatus comprising the display panel according to claim 1 .