OLED display and OLED display device

1. An organic light-emitting diode (OLED) display screen, comprising a foldable first display region and a foldable second display region, and a folded display region positioned between the first display region and the second display region, wherein the first display region and the second display region are stacked after the first display region and the second display region are folded, and a bonding region is disposed on a side edge of the second display region away from the folded display region, wherein the OLED display screen comprises at least:

a display panel; and

a first backplate disposed on at least part of the second display region close to the bonding region, wherein the display panel is disposed on the first backplate;

a buffer layer disposed on the first display region; and

a reinforcing plate disposed between the first backplate and the second backplate, wherein the reinforcing plate is in direct contact with the buffer layer.

2. The OLED display screen according to claim 1 , wherein a chip on film is disposed on the display panel corresponding to the bonding region.

3. An organic light-emitting diode (OLED) display device, comprising the OLED display screen of claim 1 .

4. The OLED display screen according to claim 1 , wherein the folded display region, and the second display region, and the buffer layer covers the first backplate.

5. The OLED display screen according to claim 4 , wherein a material of the buffer layer is foam.

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

a touch layer disposed on the display panel; and

a polarizer disposed on the touch layer;

wherein the display panel and the touch layer are connected by a first adhesive layer, and the touch layer and the polarizer are connected by a second adhesive layer.

7. The OLED display screen according to claim 6 , wherein a thickness of each of the first adhesive layer and the second adhesive layer is 100 μm.

8. The OLED display screen according to claim 6 , wherein the first adhesive layer and the second adhesive layer are an optical glue.

9. The OLED display screen according to claim 1 , wherein the bonding region comprises a bending region and a non-bending region, and the bending region is disposed between the second display region and the non-bending region.

10. The OLED display screen according to claim 9 , further comprising a second backplate, wherein the second backplate is disposed on the non-bending region, and the second backplate is disposed on a side of the display panel close to the second display region.

11. The OLED display screen according to claim 10 , wherein a size of the first backplate in a first direction is greater than or equal to a size of the second backplate in the first direction, the first direction is a direction perpendicular to an extending direction of a bending axis of the bonding region, and the OLED display screen is bent along the bending axis.

12. The OLED display screen according to claim 11 , wherein the size of the first backplate in the first direction ranges from 5 mm to 15 mm, and the size of the second backplate in the first direction ranges from 2 mm to 5 mm.

13. The OLED display screen according to claim 11 , wherein a thickness of the first backplate and the second backplate ranges from 40 μm to 75 μm.

14. An organic light-emitting diode (OLED) display screen, comprising a foldable first display region and a foldable second display region, and a folded display region positioned between the first display region and the second display region, wherein the first display region and the second display region are stacked after the first display region and the second display region are folded, a bonding region is disposed on a side edge of the second display region away from the folded display region, the bonding region comprises a bending region and a non- bending region, the bending region is disposed between the second display region and the non-bending region, and a chip on film is disposed on a display panel corresponding to the bonding region, wherein the OLED display screen comprises at least:

the display panel;

a first backplate disposed on at least part of the second display region close to the bonding region, wherein the display panel is disposed on the first backplate;

a buffer layer disposed on the first display region; and

a reinforcing plate disposed between the first backplate and the second backplate, wherein the reinforcing plate is in direct contact with the buffer layer.

15. The OLED display screen according to claim 14 , wherein the folded display region, and the second display region, and the buffer layer covers the first backplate.

16. The OLED display screen according to claim 15 , wherein a material of the buffer layer is foam.

17. The OLED display screen according to claim 14 , further comprising a second backplate, wherein the second backplate is disposed on the non-bending region, and the second backplate is disposed on a side of the display panel close to the second display region.

18. The OLED display screen according to claim 17 , wherein a size of the first backplate in a first direction is greater than or equal to a size of the second backplate in the first direction, the first direction is a direction perpendicular to an extending direction of a bending axis of the bonding region, and the OLED display screen is bent along the bending axis.

19. The OLED display screen according to claim 18 , wherein the size of the first backplate in the first direction ranges from 5 mm to 15 mm, and the size of the second backplate in the first direction ranges from 2 mm to 5 mm.