Flexible display screen and flexible display apparatus

1. A flexible display screen, comprising:

a flexible display panel, comprising a display region and a non-display region, the non-display region having a bending region and a binding region located at a side of the bending region away from the display region and extending to a back of the display region;

a first heat insulation layer, a heat dissipation layer, and a second heat insulation layer which are stacked in the display region and along a direction from the back to a light-emitting surface; and

a support portion, disposed below the first heat insulation layer away from the light-emitting surface and provided with a recess for receiving a driver chip.

2. The flexible display screen according to claim 1 , further comprising a driver chip electrically connected to the binding region of flexible display panel;

wherein a material of the support portion comprises a heat dissipation material.

3. The flexible display screen according to claim 1 , wherein a thickness of the driver chip is less than or equal to a depth of the recess, and a cross-sectional area of the driver chip is less than a width of the recess in a same plane.

4. The flexible display screen according to claim 1 , wherein a depth of the recess is greater than or equal to two thirds of a thickness of the support portion.

5. The flexible display screen according to claim 1 , wherein there is a gap between the driver chip and an inner wall of the recess.

6. The flexible display screen according to claim 3 , wherein the driver chip is fixed in the binding region by a heat dissipation tape.

7. The flexible display screen according to claim 3 , wherein the driver chip is connected to the binding region of the flexible display panel by a flexible circuit board.

8. The flexible display screen according to claim 6 , wherein a gap is configured between the heat dissipation tape and an inner wall of the recess.

9. The flexible display screen according to claim 1 , wherein a depth of the recess is less than a thickness of the support portion, and the driver chip is in contact with the recess.

10. The flexible display screen according to claim 9 , wherein a cross-sectional area of the driver chip is less than a cross-sectional area of the recess.

11. The flexible display screen according to claim 9 , wherein the driver chip is directly in contact with a bottom surface of the support portion, or the driver chip is in contact with the support portion through a heat dissipation material or a heat insulation material.

12. The flexible display screen according to claim 1 , wherein the heat dissipation layer comprises at least two heat dissipation sub-layers and adjacent two of the at least two heat dissipation sub-layers have different materials.

13. The flexible display screen according to claim 12 , wherein a thickness of each of the at least two heat dissipation sub-layers is not greater than 10 μm.

14. The flexible display screen according to claim 12 , wherein at least one of the at least two heat dissipation sub-layers is a metal heat dissipation layer, at least one of the at least two heat dissipation sub-layers is a carbon-containing heat dissipation layer, and the metal heat dissipation layer is located at a side of the carbon-containing heat dissipation layer away from the first heat insulation layer.

15. The flexible display screen according to claim 14 , wherein the metal heat dissipation layer is a metal coating layer, and the carbon-containing heat dissipation layer is a nano-coating layer.

16. The flexible display screen according to claim 1 , wherein the second heat insulation layer comprises at least two heat insulation sub-layers, and adjacent two of the at least two heat insulation sub-layers comprise different materials.

17. The flexible display screen according to claim 16 , wherein one of the at least two heat insulation sub-layers is made of a heat insulation foam, and another is a heat insulation PET tape, and the heat insulation PET tape is located at a side of the heat insulation foam away from the heat dissipation layer.

18. The flexible display screen according to claim 17 , wherein the flexible display screen further comprises a buffer layer and the buffer layer and at least one of the at least two heat insulation sub-layers are made of the heat insulation foam.

19. The flexible display screen according to claim 1 , wherein the first heat insulation layer is configured as a single-layer structure comprising heat insulation tape.

20. A flexible display device, comprising the flexible display screen according to claim 1 .