OLED display panel

1. An organic light emitting diode (OLED) display panel, comprising:

a substrate, wherein the substrate comprises a display region and a non-display region disposed outside the display region, and an aperture is defined in the display region; wherein a first recess is defined in the non-display region, and a second recess is defined in a periphery of the aperture and is located between the aperture and the display region;

an organic light emitting material layer, wherein the organic light emitting material layer is disposed on the substrate, portions of the organic light emitting material layer corresponding to the first recess and the second recess are broken off, and the portion of the organic light emitting material layer broken off and corresponding to the first recess forms two broken end edges spaced from each other oppositely; and

an encapsulation layer, wherein the encapsulation layer is disposed on the organic light emitting material layer, a portion of the encapsulation layer corresponding to the first recess is broken off to form two broken end portions spaced from each other oppositely, and a portion of the encapsulation layer corresponding to the second recess is continuous;

wherein two bending covering portions are formed respectively on the broken end portions of the encapsulation layer and at least directly contact and cover the broken end edges of the organic light emitting material layer respectively.

2. The OLED display panel according to claim 1 , wherein the substrate comprises

a base and an insulation layer disposed on the base;

a first sub-recess is defined in the base, a first via hole is defined in the insulation layer, and the first sub-recess and the first via hole are arranged correspondingly to form the first recess; and

a second sub-recess is defined in the base, a second via hole is defined in the insulation layer, and the second sub-recess and the second via hole are arranged correspondingly to form the second recess.

3. The OLED display panel according to claim 2 , wherein the insulation layer comprises a first extension portion, the first extension portion is disposed right above the first sub-recess, and a ratio of a length of the first extension portion to a depth of the first sub-recess is greater than 1.

4. The OLED display panel according to claim 3 , wherein a third sub-recess is defined in a bottom wall of the first sub-recess, and an opening of the third sub-recess is smaller than an opening of the first sub-recess.

5. The OLED display panel according to claim 2 , wherein an included angle between a bottom wall of the first sub-recess and a sidewall of the first sub-recess is an acute angle.

6. The OLED display panel according to claim 3 , wherein the insulation layer comprises a second extension portion, the second extension portion is disposed right above the second sub-recess, and a ratio of a length of the second extension portion to a depth of the second sub-recess ranges from 0.3 to 0.4.

7. The OLED display panel according to claim 6 , wherein an included angle between the second extension portion and a sidewall of the second sub-recess ranges from 75 degrees to 180 degrees.

8. The OLED display panel according to claim 6 , wherein the length of the second extension portion is 1 micron, and the depth of the second sub-recess is 3 microns.

9. The OLED display panel according to claim 2 , wherein a transistor layer is disposed on the base and comprises a first insulation layer, an active layer, a second insulation layer, a gate electrode, a third insulation layer, a source electrode/drain electrode, and a fourth insulation layer sequentially stacked on one another; wherein the insulation layer comprises the first insulation layer, the second insulation layer, and the third insulation layer.

10. The OLED display panel according to claim 1 , wherein a barrier wall structure is disposed on the periphery of the aperture; a number of the second recess located on a side of the barrier wall structure away from the first recess is greater than or equal to 1, and a number of the second recess located on a side of the barrier wall structure near the first recess is greater than or equal to 3.

11. An organic light emitting diode (OLED) display panel, comprising:

a substrate, wherein the substrate comprises a display region and a non-display region disposed outside the display region, and an aperture is defined in the display region; wherein a first recess is defined in the non-display region, and a second recess is defined in a periphery of the aperture and is located between the aperture and the display region;

an organic light emitting material layer, wherein the organic light emitting material layer is disposed on the substrate, portions of the organic light emitting material layer corresponding to the first recess and the second recess are broken off, and the portion of the organic light emitting material layer broken off and corresponding to the first recess forms two broken end edges spaced from each other oppositely; and

an encapsulation layer, wherein the encapsulation layer is disposed on the organic light emitting material layer, a portion of the encapsulation layer corresponding to the first recess is broken off to form two broken end portions spaced from each other oppositely, and a portion of the encapsulation layer corresponding to the second recess is continuous;

wherein two bending covering portions are formed respectively on the broken end portions of the encapsulation layer and at least directly contact and cover the broken end edges of the organic light emitting material layer respectively;

wherein the substrate comprises a base and an insulation layer disposed on the base;

wherein a first sub-recess is defined in the base, a first via hole is defined in the insulation layer, and the first sub-recess and the first via hole are arranged correspondingly to form the first recess;

wherein a second sub-recess is defined in the base, a second via hole is defined in the insulation layer, and the second sub-recess and the second via hole are arranged correspondingly to form the second recess; and

wherein a barrier wall structure is disposed on the periphery of the aperture; a number of the second recess located on a side of the barrier wall structure away from the first recess is greater than or equal to 1, and a number of the second recess located on a side of the barrier wall structure near the first recess is greater than or equal to 3.

12. The OLED display panel according to claim 11 , wherein the insulation layer comprises a first extension portion, the first extension portion is disposed right above the first sub-recess, and a ratio of a length of the first extension portion to a depth of the first sub-recess is greater than 1.

13. The OLED display panel according to claim 12 , wherein a third sub-recess is defined in a bottom wall of the first sub-recess, and an opening of the third sub-recess is smaller than an opening of the first sub-recess.

14. The OLED display panel according to claim 11 , wherein an included angle between a bottom wall of the first sub-recess and a sidewall of the first sub-recess is an acute angle.

15. The OLED display panel according to claim 12 , wherein the insulation layer comprises a second extension portion, the second extension portion is disposed right above the second sub-recess, and a ratio of a length of the second extension portion to a depth of the second sub-recess ranges from 0.3 to 0.4.

16. The OLED display panel according to claim 15 , wherein an included angle between the second extension portion and a sidewall of the second sub-recess ranges from 75 degrees to 180 degrees.

17. The OLED display panel according to claim 15 , wherein the length of the second extension portion is 1 micron, and the depth of the second sub-recess is 3 microns.

18. The OLED display panel according to claim 11 , wherein a transistor layer is disposed on the base and comprises a first insulation layer, an active layer, a second insulation layer, a gate electrode, a third insulation layer, a source electrode/drain electrode, and a fourth insulation layer sequentially stacked on one another; wherein the insulation layer comprises the first insulation layer, the second insulation layer, and the third insulation layer.