Flexible display substrate, manufacturing method thereof, and flexible display device

1. A flexible display substrate, comprising a flexible substrate and a cathode layer arranged on the flexible substrate, wherein the cathode layer is provided with at least one gap;

wherein the flexible display substrate further comprises a curved portion and a non-curved portion, wherein the at least one gap is arranged in the cathode layer at the curved portion; and

the cathode layer at the non-curved portion is an unbroken layer without the gap.

2. The flexible display substrate according to claim 1 , wherein the at least one gap extends in a direction identical to a bendable direction of the flexible display substrate.

3. The flexible display substrate according to claim 1 , wherein the cathode layer comprises at least two cathode units separated from each other, and each gap is arranged between the cathode units.

4. The flexible display substrate according to claim 3 , further comprising a plurality of subpixels, wherein the gap between the cathode units is located at a position corresponding to, and has a width smaller than or equal to, the gap between the subpixels.

5. The flexible display substrate according to claim 4 , wherein ends of at least two of the cathode units are connected to each other.

6. The flexible display substrate according to claim 4 , wherein the cathode units are arranged in a column, and each cathode unit corresponds to the subpixels in at least one column.

7. The flexible display substrate according to claim 6 , wherein ends of at least two of the cathode units are connected to each other.

8. The flexible display substrate according to claim 4 , wherein the cathode units are arranged in a row, and each cathode unit corresponds to the subpixels in at least one row.

9. The flexible display substrate according to claim 8 , wherein ends of at least two of the cathode units are connected to each other.

10. The flexible display substrate according to claim 3 , wherein each cathode unit is strip-like.

11. The flexible display substrate according to claim 3 , wherein ends of at least two of the cathode units are connected to each other.

12. A method for manufacturing a flexible display substrate, comprising forming a cathode layer provided with at least one gap;

wherein manufacturing the flexible display substrate further comprises providing a curved portion and a non-curved portion, wherein the at least one gap is arranged in the cathode layer at the curved portion;

the cathode layer at the non-curved portion is an unbroken layer without the gap.

13. The method according to claim 12 , wherein the cathode layer provided with at least one gap is formed through an evaporation or patterning process.

14. A flexible display device comprising the flexible display substrate according to claim 1 .

15. A flexible display substrate, comprising:

a first organic material layer;

a cathode layer provided with at least one gap; and

a second organic material layer,

wherein the cathode layer is sandwiched between the first organic material layer and the second organic material layer;

wherein the flexible display substrate further comprises a curved portion and a non-curved portion, wherein the at least one gap is arranged in the cathode layer at the curved portion;

the cathode layer at the non-curved portion is an unbroken layer without the gap.

16. The flexible display substrate according to claim 15 , wherein the at least one gap is strip-like.

17. The flexible display substrate according to claim 15 , wherein the cathode layer is provided with a plurality of strip-like gaps separated from each other.

18. The flexible display substrate according to claim 17 , further comprising a plurality of subpixels, wherein a vertical distance between two opposite subpixels arranged at both sides of each strip-like gap along a width direction of the strip-like gap is greater than or equal to a width of the strip-like gap.