Display panel and manufacturing method thereof

1. A display panel, comprising a flexible substrate, wherein the flexible substrate comprises a bending region and a non-bending region, and a thickness of the flexible substrate positioned in the bending region is less than a thickness of the flexible substrate positioned in the non-bending region;

wherein a first groove is disposed on a surface of the flexible substrate, and the first groove is disposed corresponding to the bending region; and

wherein a second groove is disposed on a surface of the flexible substrate opposite from the first groove, and the second groove is disposed corresponding to the bending region.

2. The display panel according to claim 1 , wherein a plurality of third grooves are disposed on a surface of the flexible substrate away from the first groove, and the third grooves are disposed corresponding to the bending region.

3. The display panel according to claim 1 , wherein a plurality of fourth grooves are disposed at a bottom of the first groove.

4. The display panel according to claim 1 , wherein a plurality of fourth grooves are disposed at a bottom of the first groove, and a plurality of fifth grooves are disposed at a bottom of the second groove.

5. The display panel according to claim 1 , wherein the flexible substrate comprises a first flexible layer, and an intermediate layer and a second flexible layer are sequentially disposed on the first flexible layer; and

the first groove is disposed on a surface of the first flexible layer away from the intermediate layer, and the second groove is disposed on a surface of the second flexible layer away from the intermediate layer.

6. The display panel according to claim 5 , wherein a plurality of fourth grooves are disposed at a bottom of the first groove, and a plurality of fifth grooves are disposed at a bottom of the second groove.

7. The display panel according to claim 1 , wherein the non-bending region comprises a first region and a second region, and the first region and the second region are connected to each other by the bending region; wherein the display panel further comprises a thin film transistor (TFT) array layer, an organic light-emitting layer, and an encapsulation layer sequentially disposed on the flexible substrate positioned in the first region, a metal layer disposed on the flexible substrate positioned in the bending region, and a driving circuit disposed on the flexible substrate positioned in the second region; and wherein the metal layer extends from the TFT array layer to the driving circuit.

8. The display panel according to claim 7 , wherein the flexible substrate positioned in the bending region is bent to an angle of 180° in a direction away from the TFT array layer; wherein the display panel further comprises a support layer, the support layer is positioned on a side of the flexible substrate away from the TFT array layer, and the flexible substrate positioned in the first region and the flexible substrate positioned in the second region are connected and fixed by the support layer.

9. The display panel according to claim 8 , wherein the first region comprises a display region and a first transition region, and the second region comprises a second transition region and a third region; wherein the display region and the bending region are connected through the first transition region, the third region and the bending region are connected through the second transition region; the first transition region corresponds to the second transition region, the third region corresponds to the display region; and the TFT array layer, the organic light-emitting layer, and the support layer are disposed corresponding to the display region.

10. A method of manufacturing a display panel, comprising the following steps:

providing a flexible substrate, wherein the flexible substrate comprises a bending region and a non-bending region; and

performing a thinning process on the flexible substrate in the bending region so that a thickness of the flexible substrate in the bending region is less than a thickness of the flexible substrate in the non-bending region;

wherein the flexible substrate comprises a first flexible layer, and an intermediate layer and a second flexible layer are sequentially disposed on the first flexible layer;

wherein performing a thinning process on the flexible substrate in the bending region comprises the following steps:

covering the first flexible layer and a surface of a side of the second flexible layer away from the intermediate layer in the non-bending region with a photoresist layer to expose the first flexible layer and the second flexible layer in the bending region;

etching exposed the first flexible layer and the second flexible layer by an etching solution to thin thicknesses of the first flexible layer and the second flexible layer in the bending region; and

removing the photoresist layer covered on the flexible substrate.

11. The method of manufacturing the display panel according to claim 10 , wherein performing a thinning process on the flexible substrate in the bending region comprises the following steps:

covering a surface of the flexible substrate in the non-bending region with a photoresist layer to expose the flexible substrate in the bending region;

etching the exposed flexible substrate by an etching solution to thin the thickness of the flexible substrate in the bending region; and

removing the photoresist layer covered on the flexible substrate.