DISPLAY PANEL, METHOD FOR CONTROLLING DISPLAY PANEL, AND DISPLAY DEVICE

• US 20180348944A1
• Filed: 10/20/2017
• Published: 12/06/2018
• Est. Priority Date: 06/06/2017
• Status: Active Grant

• Current Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Original Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Inventors: LU, Feng, YAO, Qijun
• Granted Patent: US 10,585,521 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04142 the force sensing means being located peripherally, e.g. disposed at the corners or at the side of a touch sensing plate
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G09G 2310/0286 Details of a shift registers arranged for use in a driving circuit
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 3/2092 Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165

Abstract

Embodiments of the present disclosure provide a display panel, a control method and a display device, which relate to the field of force touch display technologies, and can improve sensitivity of the force sensing unit. The display panel includes: a plurality of force sensing branches connected in parallel; a plurality of force sensing unit sets corresponding to the plurality of force sensing branches; and a plurality of switch units corresponding to the plurality of force sensing branches; wherein each of the force sensing unit sets includes one or more force sensing unit, each force sensing unit includes two input ends, the input ends of the force sensing units in each of the force sensing unit sets are mutually connected in series or in parallel in a corresponding force sensing branch; and wherein the switch units are arranged in a corresponding one force sensing branches in series.

Claims

1. A display panel, comprising:

a plurality of force sensing branches connected in parallel;

a plurality of force sensing unit sets respectively corresponding to the plurality of force sensing branches; and

a plurality of switch units respectively corresponding to the plurality of force sensing branches;

wherein each of the force sensing unit sets comprises one or more force sensing units, each force sensing unit comprises two input ends, the input ends of the one or more force sensing units in each of the force sensing unit sets are connected in series or in parallel in a corresponding force sensing branch; and

wherein each of the plurality of switch units is connected in series in a corresponding force sensing branch.

2. The display panel according to claim 1, further comprising:

a gate electrode drive circuit, the gate electrode drive circuit comprising a plurality of vertical shift registers;

wherein the plurality of shift registers comprises multiple assigned shift registers, and each of the assigned shift registers corresponds to one or more of the switch units;

wherein each of the switch units has a control end; and

wherein an output end of each of the assigned shift registers is electrically connected with the control end of the corresponding one or more of the switch units.

3. The display panel according to claim 2, wherein

the plurality of switch units are thin film transistors.

4. The display panel according to claim 1, wherein

the display panel has a display area and a non-display area surrounding the display area;

and

the plurality of force sensing unit sets is located in the non-display area.

5. The display panel according to claim 1, wherein

each of the force sensing unit sets comprises a single force sensing unit.

6. The display panel according to claim 1, wherein

each of the force sensing units comprises a first input end, a second input end, a first output end, a second output end, a first strain force sensor, a second strain force sensor, a third strain force sensor and a fourth strain force sensor;

in each of the force sensing units, the first strain force sensor is connected in series between the first input end and the first output end, the second strain force sensor is connected in series between the second input end and the second output end, the third strain force sensor is connected in series between the second input end and the first output end, and the fourth strain force sensor is connected in series between the first input end and the second output end.

7. The display panel according to claim 6, wherein

the first strain force sensor and the second strain force sensor have a first force sensing orientation, the third strain force sensor and the fourth strain force sensor have a second force sensing orientation, and the first force sensing orientation is different from the second force sensing orientation.

8. The display panel according to claim 6, wherein

the first strain force sensor and the second strain force sensor are located in a first force sensing layer, the third strain force sensor and the fourth strain force sensor are located in a second force sensing layer, and the first force sensing layer is different from the second force sensing layer.

9. The display panel according to claim 1, wherein

each of the force sensing units is a silicon piezoresistive force sensor.

10. A display panel, comprising:

a plurality of force sensing branches connected in series;

a plurality of force sensing unit sets respectively corresponding to the plurality of force sensing branches; and

a plurality of switch units respectively corresponding to the plurality of force sensing branches;

wherein each of the force sensing unit sets comprises one or more force sensing units, each force sensing unit comprises two input ends, the input ends of the one or more of force sensing units in each of the force sensing unit sets are connected in series or in parallel in a corresponding force sensing branch; and

wherein each of the plurality of switch units is connected in parallel to a corresponding force sensing branch.

11. The display panel according to claim 10, further comprising

a gate electrode drive circuit, the gate electrode drive circuit comprising a plurality of vertical shift registers;

wherein the plurality of shift registers comprises multiple assigned shift registers, and each of the assigned shift registers corresponds to one or more of the switch units;

wherein each of the switch units has a control end; and

wherein an output end of each of the assigned shift registers is electrically connected with the control end of the corresponding one or more of the switch units.

12. The display panel according to claim 11, wherein

the switch unit is a first thin film transistor.

13. The display panel according to claim 12, wherein

the display panel further comprises a plurality of sub-pixel units arranged in a matrix, wherein each of the plurality of sub-pixel units corresponds to one second thin film transistor, and the second thin film transistor is electrically connected with the gate electrode drive circuit;

and

wherein the first thin film transistor is an N-type thin film transistor, and the second thin film transistor is a P-type thin film transistor;

or

the first thin film transistor is a P-type thin film transistor, and the second thin film transistor is an N-type thin film transistor.

14. The display panel according to claim 10, wherein

the display panel has a display area and a non-display area surrounding the display area;

the plurality of force sensing unit sets is located in the non-display area.

15. The display panel according to claim 10, wherein

each of the force sensing unit sets only comprises one force sensing unit.

16. The display panel according to claim 10, wherein

each of the force sensing units comprises a first input end, a second input end, a first output end, a second output end, a first strain force sensor, a second strain force sensor, a third strain force sensor and a fourth strain force sensor;

in each of the force sensing units, the first strain force sensor is connected in series between the first input end and the first output end, the second strain force sensor is connected in series between the second input end and the second output end, the third strain force sensor is connected in series between the second input end and the first output end, and the fourth strain force sensor is connected in series between the first input end and the second output end.

17. The display panel according to claim 16, wherein

the first strain force sensor and the second strain force sensor have a first force sensing orientation, the third strain force sensor and the fourth strain force sensor have a second force sensing orientation, and the first force sensing orientation is different from the second force sensing orientation.

18. The display panel according to claim 16, wherein

the first strain force sensor and the second strain force sensor are located in a first force sensing layer, the third strain force sensor and the fourth strain force sensor are located in a second force sensing layer, and the first force sensing layer is different from the second force sensing layer.

19. The display panel according to claim 10, wherein

the force sensing unit is a silicon piezoresistive force sensor.

20. A display device, comprising a display panel, wherein the display panel comprises:

a plurality of force sensing branches connected in parallel;

a plurality of force sensing unit sets respectively corresponding to the plurality of force sensing branches; and

a plurality of switch units respectively corresponding to the plurality of force sensing branches;

wherein each of the force sensing unit sets comprises one or more force sensing units, each force sensing unit comprises two input ends, the input ends of the one or more force sensing units in each of the force sensing unit sets are connected in series or in parallel in a corresponding force sensing branch; and

wherein each of the plurality of switch units is connected in series in a corresponding force sensing branch.

21. A display device, comprising a display panel, wherein the display panel comprises:

a plurality of force sensing branches connected in series;

a plurality of force sensing unit sets respectively corresponding to the plurality of force sensing branches; and

a plurality of switch units respectively corresponding to the plurality of force sensing branches;

wherein each of the force sensing unit sets comprises one or more force sensing units, each force sensing unit comprises two input ends, the input ends of the one or more of force sensing units in each of the force sensing unit sets are connected in series or in parallel in a corresponding force sensing branch; and

wherein each of the plurality of switch units is connected in parallel to a corresponding force sensing branch.