Flexible display screen and display device

1. A flexible display screen, comprising:

a substrate;

a backing film stacked on a side of the substrate facing away from a light-emitting surface of the flexible display screen;

a pressure sensor stacked on a side of the backing film facing away from the substrate and configured to output a signal related to a force applied on the flexible display screen, and

a plurality of pixel units located on a side of the substrate facing the light-emitting surface of the flexible display screen, each of the pixel units including an organic electroluminescent diode,

wherein a material of the backing film is one of polyimide, polyethylene terephthalate, and cellulose triacetate,

wherein the flexible display screen further comprises a light shielding layer, the light shielding layer being located between the backing film and the pressure sensor, or between the substrate and the backing film, and

wherein a material of the light shielding layer includes an ink.

2. The flexible display screen according to claim 1 , wherein the pressure sensor includes: a first electrode, a dielectric layer, and a second electrode disposed in sequence along a direction away from the substrate with respect to the backing film.

3. The flexible display screen according to claim 2 , wherein the second electrode is a ground electrode and is shared with a middle frame of the flexible display screen.

4. The flexible display screen according to claim 2 , wherein a material of the dielectric layer includes a foam.

5. The flexible display screen according to claim 2 , further comprising a heat dissipation layer between the dielectric layer and the second electrode.

6. The flexible display screen according to claim 5 , wherein a material of the heat dissipation layer includes copper and graphite.

7. The flexible display screen according to claim 1 , further comprising a touch control unit located on a side of the pixel units facing away from the substrate and configured to detect touch control in various directions to implement a 3D touch control function.

8. The flexible display screen according to claim 7 , wherein the touch control unit includes a driving electrode and a sensing electrode.

9. The flexible display screen according to claim 4 , wherein the foam is one of ethylene propylene diene monomer and polyurethane.

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