Force touch display panel, detection method thereof, and display apparatus

1. A force touch display panel comprising:

a substrate;

a display structure disposed in a display area on the substrate;

a force common electrode layer, a piezoelectric material layer, and a force sense electrode layer, which are stacked in sequence over the display structure, wherein the force sense electrode layer comprises a force sense electrode configured for identifying different forces, and the force sense electrode additionally serves as a touch detection electrode configured for identifying a touch operation; and

a first insulating layer disposed between the force common electrode layer and the piezoelectric material layer; and/or a second insulating layer disposed between the piezoelectric material layer and the force sense electrode layer.

2. The force touch display panel of claim 1 , wherein:

the force sense electrode layer comprises a plurality of said force sense electrodes insulated from one another.

3. The force touch display panel of claim 1 , wherein:

the display structure is an organic light-emitting diode;

the force touch display panel further comprises: a packaging film disposed over the organic light-emitting diode; and

the packaging film is disposed between the organic light-emitting diode and the force common electrode layer; or the packaging film is disposed between the piezoelectric material layer and the force common electrode layer, and the force common electrode layer additionally serves as a common cathode layer of the organic light-emitting diode.

4. The force touch display panel of claim 1 , wherein:

the display structure is a liquid crystal display structure;

the force touch display panel further comprises: an opposite substrate disposed over the liquid crystal display structure; and

the opposite substrate is disposed between the piezoelectric material layer and the force common electrode layer, the force common electrode layer additionally serves as a common electrode layer of the liquid crystal display structure, and the common electrode layer is disposed on a side, facing towards the substrate, of the opposite substrate.

5. The force touch display panel of claim 1 , wherein:

the piezoelectric material layer is a continuous piezoelectric material layer over the entire substrate.

6. The force touch display panel of claim 1 , wherein:

the force common electrode layer is a continuous piezoelectric common electrode layer over the entire substrate.

7. The force touch display panel of claim 1 , wherein:

the touch detection electrode is a self-capacitance electrode.

8. The force touch display panel of claim 1 , wherein:

the touch detection electrode is a touch sense electrode; and

the force touch display panel further comprises: a touch drive electrode layer disposed between the force sense electrode layer and the piezoelectric material layer; and an insulating layer disposed between the touch drive electrode layer and the force sense electrode layer, wherein:

the touch drive electrode layer comprises a plurality of touch drive electrodes insulated from one another.

9. The force touch display panel of claim 1 , wherein:

the touch detection electrode is a touch drive electrode;

the force touch display panel further comprises: an insulating layer and a touch sense electrode layer which are stacked in sequence on the force sense electrode layer, wherein:

the touch sense electrode layer comprises a plurality of touch sense electrodes insulated from one another.

10. The force touch display panel of claim 1 , wherein:

an optical adhesive layer is disposed between at least two adjacent ones of the force common electrode layer, the piezoelectric material layer and the force sense electrode layer.

11. A display apparatus comprising: the force touch display panel of claim 1 .

12. A method of manufacturing the force touch display panel of claim 1 , the method comprising:

providing the substrate;

forming the display structure in the display area on the substrate; and

forming the force common electrode layer, the piezoelectric material layer, and the force sense electrode layer in sequence in a stack over the display structure.

13. The method of claim 12 , wherein:

forming the force common electrode layer, the piezoelectric material layer, and the force sense electrode layer comprises:

forming the piezoelectric material layer directly on the force common electrode layer; or

forming the force sense electrode layer directly on the piezoelectric material layer.

14. The method of claim 12 , wherein:

forming the force common electrode layer, the piezoelectric material layer, and the force sense electrode layer comprises:

forming a force sense structure based on the force common electrode layer and the piezoelectric material layer;

forming a touch structure based on the force sense electrode layer; and

bonding the force sense structure and the touch structure together through an optical adhesive.

15. The method of claim 14 , wherein:

forming the force sense structure comprises bonding at least two adjacent layers of the force sense structure through an optical adhesive.

16. The method of claim 14 , wherein:

forming the touch structure comprises bonding at least two adjacent layers of the touch structure through an optical adhesive.

17. The force touch display panel of claim 1 , wherein:

the display structure is a liquid crystal display structure;

the force touch display panel further comprises: an opposite substrate disposed over the liquid crystal display structure; and

the opposite substrate is disposed between the liquid crystal display structure and the force common electrode layer.

18. A force touch display panel comprising:

a substrate;

a display structure disposed in a display area on the substrate;

a force common electrode layer, a piezoelectric material layer, and a force sense electrode layer, which are stacked in sequence over the display structure, wherein the force sense electrode layer comprises a force sense electrode configured for identifying different forces, and the force sense electrode additionally serves as a touch detection electrode configured for identifying a touch operation, wherein:

the touch detection electrode is a touch sense electrode; and

the force common electrode layer comprises a plurality of force common electrodes insulated from one another, and the plurality of force common electrodes additionally serve as touch drive electrodes.

19. A detection method of a force touch display panel, the force touch display panel comprising:

a substrate;

a display structure disposed in a display area on the substrate;

a force common electrode layer, a piezoelectric material layer, and a force sense electrode layer, which are stacked in sequence over the display structure, wherein the force sense electrode layer comprises a force sense electrode configured for identifying different forces, and the force sense electrode additionally serves as a touch detection electrode configured for identifying a touch operation; and

a first insulating layer disposed between the force common electrode layer and the piezoelectric material layer; and/or a second insulating layer disposed between the piezoelectric material layer and the force sense electrode layer,

the detection method comprising:

in a touch detection period, detecting a touched position by the force sense electrode that additionally serves as the touch detection electrode; and

in a force detection period, loading a constant electric potential to the force common electrode layer, and detecting a quantity of induced electric charges which are generated by the piezoelectric material layer under the action of a force and which are received by charge coupling by the force sense electrode, thereby detecting a position where the force acts,

wherein the touch detection period and the force detection period are a same period.