Display device, driving circuit, method for driving display device, and electronic apparatus

• US 9,773,148 B2
• Filed: 12/30/2014
• Issued: 09/26/2017
• Est. Priority Date: 03/07/2014
• Status: Active Grant

• Current Assignee: FocalTech Electronics (Shenzhen) Co., Ltd.
• Original Assignee: FocalTech Systems Co.,Ltd
• Inventors: Mo, Lianghua, Liu, Junqiao, Hu, Haijun, Liu, Jie
• Primary Examiner(s): Lee, Nicholas
• Assistant Examiner(s): Casarez, Benjamin
• Application Number:
  US14/586,063
• Publication Number:
  US 20150254491A1
• Time in Patent Office: 1,001 Days
• Field of Search: None
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06V 40/1306 non-optical, e.g. ultrasonic or capacitive sensing

Abstract

A display device is provided. The display device includes: a display panel provided with a plurality of display electrodes, where the display electrodes are configured for displaying images, display electrodes located within a predetermined region of the display panel are defined as first electrodes, the first electrodes are configured for fingerprint sensing, and a stage during which the first electrodes perform the fingerprint sensing is defined as a fingerprint sensing stage; and a driving circuit configured to, provide display signals to the display electrodes to display the images, and provide a fingerprint sensing signal to the first electrodes during the fingerprint sensing stage and perform a self-capacitance detection on the first electrodes, to implement the fingerprint sensing. A driving circuit, a method for driving the display device, a liquid crystal display device and an electronic apparatus including the display device are provided.

Claims

1. A display device, comprising:

a display panel provided with a plurality of display electrodes, the display electrodes configured to display images, wherein the display electrodes located within a predetermined region of the display panel are defined as first electrodes, the first electrodes are further configured to implement a fingerprint sensing, and a stage during which the first electrodes perform the fingerprint sensing is defined as a fingerprint sensing stage, wherein a stage during which the first electrodes perform image display is defined as an image display stage, the display panel is further provided with a common electrode, and the common electrode and each display electrode serve as two polar plates of one sub-pixel unit in the display panel; and

a driving circuit comprising;

a common voltage generation circuit connected with the common electrode and configured to provide a common voltage to the common electrode, wherein the two polar plates of each sub-pixel unit are applied with the common voltage and a display signal in the form of a pixel voltage respectively, to display the images; and

a first signal generation circuit connected with the common electrode and configured to provide a first signal, wherein the driving circuit is configured to;

provide the display signals to the display electrodes to display the images, provide a fingerprint sensing signal to the first electrodes and perform a self-capacitance detection on the first electrodes during the fingerprint sensing stage, to implement the fingerprint sensing, and

control the common voltage generation circuit to provide the common voltage to the common electrode during the image display stage; and

control the first signal generation circuit to provide the first signal to the common electrode during the fingerprint sensing stage, for reducing electric quantities in charging and discharging capacitors formed by the first electrodes and the common electrode during the fingerprint sensing.

2. The display device according to claim 1, wherein the driving circuit is configured to:

provide the display signals to the display electrodes to display the images;

provide the fingerprint sensing signal to the first electrodes and perform the self-capacitance detection on the first electrodes, to implement the fingerprint sensing; and

provide the fingerprint sensing signal to the first electrodes to perform the fingerprint sensing during the fingerprint sensing stage.

3. The display device according to claim 2, wherein

the display panel is further provided with scanning lines arranged in rows, data lines arranged in columns, and control switches connected with the scanning lines and the data lines, each control switch comprises a control terminal, a first terminal, and a second terminal, the control terminal being configured to control whether a signal is transmittable between the first terminal and the second terminal, the control terminals of the control switches are connected with the scanning lines, the first terminals are connected with the data lines, and the second terminals are correspondingly connected with the display electrodes;

the display device further comprises a scanning line driving circuit connected with the scanning lines and configured to send a scanning driving signal to the scanning lines to switch on the control switches; and

the driving circuit comprises a data line driving circuit connected with the data lines and configured to send the display signals to the data lines, and the data lines transmit the display signals to the display electrodes via the control switches that are switched on.

4. The display device according to claim 3, wherein

each sub-pixel unit comprises one display electrode and the control switch connected with the display electrode, the sub-pixel units comprising the first electrodes are defined as first sub-pixel units and other sub-pixel units are defined as second sub-pixel units, the control switch in each first sub-pixel unit is defined as a first control switch, the control switch in each second sub-pixel unit is defined as a second control switch, the scanning lines connected with the first sub-pixel units are defined as first scanning lines, the scanning lines connected with the second sub-pixel units but not connected with the first sub-pixel units are defined as second scanning lines, the data lines connected with the first sub-pixel units are defined as first data lines, and the data lines connected with the second sub-pixel units but not connected with the first sub-pixel units are defined as second data lines;

the driving circuit comprises;

a fingerprint sensing control circuit connected with the first scanning lines and configured to provide a fingerprint sensing control signal to switch on the first control switches; and

a fingerprint sensing detection circuit connected with the first data lines and configured to provide the fingerprint sensing signal to the first electrodes via the first control switches which are switched on, to perform the fingerprint sensing; and

the driving circuit is configured to control the fingerprint sensing control circuit to send the fingerprint sensing control signal to the first scanning lines to switch on the first control switches, and control the fingerprint sensing detection circuit to send the fingerprint sensing signal to the first data lines, during the fingerprint sensing stage.

5. The display device according to claim 4, wherein the display electrodes of the second sub-pixel units are defined as second electrodes;

the driving circuit is configured to control the second control switches connected with the second scanning lines to be switched off during the fingerprint sensing stage, control the fingerprint sensing control circuit to send the fingerprint sensing control signal to the first scanning lines to switch on the first control switches, and control the fingerprint sensing detection circuit to send the fingerprint sensing signal to the first data lines.

6. The display device according to claim 5, wherein the display panel comprises a plurality of second sub-pixel units connected with the first scanning lines and the second data lines;

the second control switches of the second sub-pixel units connected with the first scanning lines are switched on when the fingerprint sensing control circuit sends the fingerprint sensing control signal to the first scanning lines; and

the driving circuit is further configured to control the data line driving circuit to send the display signals to the second data lines, and the second data lines transmit the display signals to the second electrodes of the second sub-pixel units connected with the first scanning lines.

7. The display device according to claim 4, wherein the fingerprint sensing detection circuit is configured to perform the fingerprint sensing on one first sub-pixel unit in the display panel, or is configured to perform the fingerprint sensing on more than one first sub-pixel unit in the display panel simultaneously.

8. The display device according to claim 7, wherein the display panel comprises a plurality of the first sub-pixel units and a plurality of the second sub-pixel units, the first sub-pixel units comprise first red sub-pixel units, first green sub-pixel units, and first blue sub-pixel units, and the second sub-pixel units comprise second red sub-pixel units, second green sub-pixel units, and second blue sub-pixel units;

the display panel comprises first pixel units and second pixel units, the first pixel units are located within the predetermined region and are configured to implement the fingerprint sensing and image display, each first pixel unit comprises one first red sub-pixel unit, one first green sub-pixel unit and one first blue sub-pixel unit, and each second pixel unit comprises one second red sub-pixel unit, one second green sub-pixel unit and one second blue sub-pixel unit; and

the fingerprint sensing detection circuit is configured to perform the fingerprint sensing on all sub-pixel units of one first pixel unit simultaneously.

9. The display device according to claim 8, wherein the first control switches and the second control switches are poly-silicon thin film transistors, the first control switches of the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit in one first pixel unit are connected with different first scanning lines respectively and connected with an identical first data line;

the fingerprint sensing control circuit provides the fingerprint sensing control signal simultaneously to three first scanning lines respectively connected with the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit in one first pixel unit, to simultaneously switch on the first control switches of the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit in the one first pixel unit; and

the fingerprint sensing detection circuit provides the fingerprint sensing signal to the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit in the one first pixel unit via the identical first data line.

10. The display device according to claim 7, wherein the fingerprint sensing detection circuit comprises:

an operational amplifier;

a reference voltage source connected with a non-inverting input terminal of the operational amplifier and configured to provide a reference voltage;

a feedback capacitor having one plate connected to an inverting input terminal of the operational amplifier and the other plate connected to an output terminal of the operational amplifier;

a first switch having one terminal connected to the first data line and the other terminal connected to a first voltage source for outputting a first voltage, wherein a first node is defined between the first switch and the first data line, and the first voltage is greater than or smaller than the reference voltage;

a second switch having one terminal connected to the first node and the other terminal connected to the inverting input terminal of the operational amplifier;

a third switch connected in parallel with the feedback capacitor; and

a controller configured to output a first control signal and a second control signal in a time division mode, wherein the first control signal is configured to switch on the first switch and the third switch and to switch off the second switch, and the second control signal is configured to switch on the second switch and to switch off the first switch and the third switch.

11. The display device according to claim 10, wherein the reference voltage is 2V, and the first voltage is 0V or 12V.

12. The display device according to claim 4, wherein the fingerprint sensing control signal is a pulse signal having the same frequency and the same phase as the fingerprint sensing signal, and is for switching on the first control switches during the fingerprint sensing and reducing electric quantities in charging and discharging capacitors formed by the first scanning lines and the first electrodes;

or the fingerprint sensing control signal is a pulse signal having the same frequency, the same phase and the same amplitude as the fingerprint sensing signal, and is for switching on the first control switches during the fingerprint sensing and reducing electric quantities in charging and discharging capacitors formed by the first scanning lines and the first electrodes.

13. The display device according to claim 4, wherein:

one fourth switch is provided between each first data line and the data line driving circuit, and one fifth switch is provided between each first data line and the fingerprint sensing detection circuit; and

the driving circuit is configured to control the fourth switches to be switched on and the fifth switches to be switched off during the image display stage, and control the fifth switches to be switched on and the fourth switches to be switched off during the fingerprint sensing stage.

14. The display device according to claim 4, wherein the first signal is a pulse signal having the same frequency and the same phase as the fingerprint sensing signal, or the first signal is a pulse signal having the same frequency, the same phase, and the same amplitude as the fingerprint sensing signal.

15. The display device according to claim 4, wherein the first signal generation circuit is integrated in the fingerprint sensing detection circuit.

16. The display device according to claim 15, wherein a sixth switch is provided between the common voltage generation circuit and the common electrode, and a seventh switch is provided between the fingerprint sensing detection circuit and the common electrode;

and

the driving circuit controls the sixth switch to be switched on and the seventh switch to be switched off during the image display stage, and controls the seventh switch to be switched on and the sixth switch to be switched off during the fingerprint sensing stage.

17. The display device according to claim 15, wherein the fingerprint sensing detection circuit comprises a plurality of fingerprint sensing detection modules, each fingerprint sensing detection module is configured to perform the fingerprint sensing on one first sub-pixel unit or is configured to perform the fingerprint sensing on more than one first sub-pixel unit simultaneously, and the fingerprint sensing detection module is configured to output the fingerprint sensing signal and output the first signal;

the fingerprint sensing detection module comprises;

an operational amplifier;

a reference voltage source connected with a non-inverting input terminal of the operational amplifier and configured to provide a reference voltage;

a feedback capacitor having one plate connected to an inverting input terminal of the operational amplifier and the other terminal connected to an output terminal of the operational amplifier;

a first switch having one terminal connected to the first data line and the other terminal connected to a first voltage source for outputting a first voltage, wherein a first node is defined between the first switch and the first data line;

a second switch having one terminal connected to the first node and the other terminal connected to the inverting input terminal of the operational amplifier;

an eighth switch having one terminal connected to the common electrode and the other terminal connected to a second voltage source for outputting a second voltage, wherein a second node is defined between the eighth switch and the common electrode, and both the first voltage and the second voltage are smaller than or greater than the reference voltage;

a ninth switch having one terminal connected to the second node and the other terminal connected to the reference voltage source;

a third switch connected in parallel with the feedback capacitor; and

a controller configured to output a third control signal and a fourth control signal in a time division mode, wherein the third control signal is configured to switch on the first switch, the eighth switch and the third switch and to switch off the second switch and the ninth switch, and the fourth control signal is configured to switch on the second switch and the ninth switch and to switch off the first switch, the eighth switch and the third switch.

18. The display device according to claim 4, wherein:

the display device further comprises a touch-sensitive unit, the touch-sensitive unit being stacked on the display panel or being a part of the display panel;

the driving circuit further comprises a touch driving circuit configured to perform a touch detection on the touch-sensitive unit; and

the driving circuit is connected with the touch driving circuit, and is configured to control the image display, the touch detection, and the fingerprint sensing in a time division mode, to implement the image display stage, a touch detection stage, and the fingerprint sensing stage respectively.

19. The display device according to claim 18, wherein the common electrode serves as a self-capacitive electrode for the touch detection;

and

the touch driving circuit is connected with the common electrode and is configured to provide a self-capacitive touch detection signal to the common electrode.

20. The display device according to claim 19, wherein a sixth switch is provided between the common electrodes and the common voltage generation circuit, a seventh switch is provided between the fingerprint sensing detection circuit and the common electrodes, and a tenth switch is provided between the common electrodes and the touch driving circuit;

and

the driving circuit is configured to control the sixth switch to be switched on and the seventh switch and the tenth switch to be switched off during the image display stage, control the tenth switch to be switched on and the sixth switch and the seventh switch to be switched off during the touch detection stage, and control the seventh switch to be switched on and the sixth switch and the tenth switch to be switched off during the fingerprint sensing stage.

21. The display device according to claim 19, wherein the driving circuit further comprises a second signal generation circuit connected with the first scanning lines and the second scanning lines and configured to provide a second signal;

and

the driving circuit is configured to control the second signal generation circuit to provide the second signal to the first scanning lines and the second scanning lines during the touch detection, the control switches are controlled to be in a switched-off state due to the second signal, and electric quantities in charging and discharging capacitors formed by the common electrodes and the first scanning lines, and electric quantities in charging and discharging capacitors formed by the common electrodes and the second scanning lines are reduced due to the second signal.

22. The display device according to claim 21, wherein the second signal is a pulse signal having the same frequency and the same phase as the touch detection signal, or the second signal is a pulse signal having the same frequency, the same phase, and the same amplitude as the touch detection signal.

23. The display device according to claim 19, wherein the driving circuit further comprises a third signal generation circuit connected with the first data lines and the second data lines and configured to provide a third signal;

and

the driving circuit is configured to control the third signal generation circuit to provide the third signal to the first data lines and the second data lines during the touch detection, electric quantities in charging and discharging capacitors formed by the common electrodes and the first data lines and electric quantities in charging and discharging capacitors formed by the common electrodes and the second data lines are reduced due to the third signal.

24. The display device according to claim 23, wherein the third signal is a pulse signal having the same frequency and the same phase as the touch detection signal, or the third signal is a pulse signal having the same frequency, the same phase, and the same amplitude as the touch detection signal.

25. The display device according to claim 2, wherein the driving circuit is further configured to provide the display signals corresponding to fingerprint information to the display electrodes, to display a fingerprint image, after the driving circuit completes the fingerprint sensing or when the driving circuit performs the fingerprint sensing.

26. The display device according to claim 1, wherein the display panel is an In-Plane Switching liquid crystal display panel.

27. The display device according to claim 1, wherein the driving circuit provides a periodically-varying fingerprint sensing signal to the first electrodes to perform the self-capacitance detection on the first electrodes, to implement the fingerprint sensing.

28. The display device according to claim 1, wherein the driving circuit is connected with the display electrodes, and the driving circuit is configured to:

provide the display signals to the display electrodes to display the images;

provide the fingerprint sensing signal to the first electrodes and perform the self-capacitance detection on the first electrodes, to implement the fingerprint sensing; and

provide the fingerprint sensing signal to the first electrodes to perform the fingerprint sensing, and stop outputting the display signals to the first electrodes or disconnect from the first electrodes to stop outputting the display signals to the first electrodes, during the fingerprint sensing stage.

29. The display device according to claim 28, wherein the driving circuit outputs the display signals to the first electrodes to perform the image display, and stops outputting the fingerprint sensing signal to the first electrodes or disconnects from the first electrodes to stop outputting the fingerprint sensing signal to the first electrodes, during the image display stage.

30. An electronic apparatus, comprising the display device according to claim 1.

31. The electronic apparatus according to claim 30, further comprising:

a fingerprint sensing instruction circuit configured to trigger the fingerprint sensing stage of the display device; and

a turning-on device, an application device and a touch detection device, wherein the fingerprint sensing instruction circuit is disposed in any one or any combination of the turning-on device, the application device and the touch detection device.

32. A display device, comprising:

a display panel provided with a plurality of display electrodes, the display electrodes located within a predetermined region of the display panel are defined as first electrodes and a plurality of display electrodes located outside the predetermined region are defined as the second electrodes wherein a stage during which the first electrodes perform image display is define as an image display stage, the display panel is further provided with a common electrode, and the common electrode and each display electrode serve as two polar plates of one sub-pixel unit in the display panel; and

a driving circuit comprising;

a common voltage generation circuit connected with the common electrode and configured to provide a common voltage to the common electrode, wherein the two polar plates of each sub-pixel unit are applied with the common voltage and a display signal in the form of a pixel voltage respectively, to display images; and

a first signal generation circuit connected with the common electrode and configured to provide a first signal, wherein the driving circuit is configured to;

provide a fingerprint sensing signal to the first electrodes and perform a self-capacitance detection on the first electrodes, to implement a fingerprint sensing, and provide the display signals to the second electrodes to display the images, and

control the common voltage generation circuit to provide the common voltage to the common electrode during the image display stage; and

control the first signal generation circuit to provide the first signal to the common electrode during the fingerprint sensing stage, for reducing electric quantities in charging and discharging capacitors formed by the first electrodes and the common electrode during the fingerprint sensing.

33. The display device according to claim 32, wherein the driving circuit is configured to:

provide the display signals to the second electrodes to display the images; and

provide the fingerprint sensing signal to the first electrodes and perform the self-capacitance detection on the first electrodes, to implement the fingerprint sensing.

34. The display device according to claim 33, wherein

the display panel is provided with first scanning lines arranged in rows, first data lines arranged in columns, and first control switches connected with the first scanning lines and the first data lines, each first control switch comprises a control terminal, a first terminal, and a second terminal, the control terminal being configured to control whether a signal is transmittable between the first terminal and the second terminal, the control terminals of the first control switches are connected with the first scanning lines, the first terminals are connected with the first data lines, and the second terminals are correspondingly connected with the first electrodes;

and

the driving circuit comprises;

a fingerprint sensing control circuit connected with the first scanning lines and configured to provide a fingerprint sensing control signal to switch on the first control switches; and

a fingerprint sensing detection circuit connected with the first data lines and configured to provide the fingerprint sensing signal to the first electrodes via the first control switches that are switched on, to perform the fingerprint sensing.

35. The display device according to claim 33, wherein

the display panel is further provided with second scanning lines arranged in rows, second data lines arranged in columns, and second control switches connected with the second scanning lines and the second data lines, each second control switch comprises a control terminal, a first terminal, and a second terminal, the control terminal being configured to control whether a signal is transmittable between the first terminal and the second terminal, the control terminals of the second control switches are connected with the second scanning lines, the first terminals are connected with the second data lines, and the second terminals are correspondingly connected with the second electrodes;

and

the driving circuit is connected with the second scanning lines and the second data lines, and the driving circuit is configured to

send a scanning driving signal to the second scanning lines to switch on the second control switches; and

send the display signals to the second data lines, wherein the data lines transmit the display signals to the second electrodes via the second control switches that are switched on.

36. The display device according to claim 32, wherein the display panel is an In-Plane Switching liquid crystal display panel.

37. A driving circuit for a display device, wherein the display device comprises a display panel provided with a plurality of display electrodes, the display electrodes are configured to display images, the display electrodes located within a predetermined region of the display panel are defined as first electrodes, the first electrodes are configured to implement a fingerprint sensing, and a stage during which the first electrodes perform the fingerprint sensing is defined as a fingerprint sensing stage, wherein a stage during which the first electrodes perform image display is define as an image display stage, the display panel is further provided with a common electrode, and the common electrode and each display electrode serve as two polar plates of one sub-pixel unit in the display panel;

and

the driving circuit is configured to;

provide display signals to the display electrodes, to display the images wherein the display signals are pixel voltages;

provide a fingerprint sensing signal to the first electrodes and perform a self-capacitance detection on the first electrodes, to implement the fingerprint sensing; and

provide the fingerprint sensing signal to the first electrodes to perform the fingerprint sensing during the fingerprint sensing stage, wherein the driving circuit comprises;

a common voltage generation circuit connected with the common electrode and configured to provide a common voltage to the common electrode, wherein the two polar plates of each sub-pixel unit are applied with the common voltage and one of the pixel voltages respectively, to display the images; and

a first signal generation circuit connected with the common electrode and configured to provide a first signal, wherein the driving circuit is further configured to;

control the common voltage generation circuit to provide the common voltage to the common electrode during the image display stage; and

control the first signal generation circuit to provide the first signal to the common electrode during the fingerprint sensing stage, for reducing electric quantities in charging and discharging capacitors formed by the first electrodes and the common electrode during the fingerprint sensing.

38. The driving circuit according to claim 37, wherein

the display panel is further provided with scanning lines arranged in rows, data lines arranged in columns, and control switches connected with the scanning lines and the data lines, each control switch comprises a control terminal, a first terminal and a second terminal, the control terminal being configured to control whether a signal is transmittable between the first terminal and the second terminal, the control terminals of the control switches are connected with the scanning lines, the first terminals are connected with the data lines, and the second terminals are correspondingly connected with the display electrodes;

the display device further comprises a scanning line driving circuit connected with the scanning lines and configured to send a scanning driving signal to the scanning lines to switch on the control switches; and

the driving circuit comprises a data line driving circuit connected with the data lines and configured to send the display signals to the data lines, and the data lines transmit the display signals to the display electrodes via the control switches that are switched.

39. The driving circuit according to claim 38, wherein

each sub-pixel unit comprises one display electrode and the control switch connected with the display electrode, the sub-pixel units comprising the first electrodes are defined as first sub-pixel units and other sub-pixel units are defined as second sub-pixel units, the control switch in each first sub-pixel unit is defined as a first control switch, the control switch in each second sub-pixel unit is defined as a second control switch, the scanning lines connected with the first sub-pixel units are defined as first scanning lines, the scanning lines connected with the second sub-pixel units but not connected with the first sub-pixel units are defined as second scanning lines, the data lines connected with the first sub-pixel units are defined as first data lines, and the data lines connected with the second sub-pixel units but not connected with the first sub-pixel units are defined as second data lines;

the driving circuit comprises;

a fingerprint sensing control circuit connected with the first scanning lines and configured to provide a fingerprint sensing control signal to switch on the first control switches; and

a fingerprint sensing detection circuit connected with the first data lines and configured to provide the fingerprint sensing signal to the first electrodes via the first control switches which are switched on, to perform the fingerprint sensing; and

the driving circuit is configured to control the fingerprint sensing control circuit to send the fingerprint sensing control signal to the first scanning lines to switch on the first control switches, and control the fingerprint sensing detection circuit to send the fingerprint sensing signal to the first data lines, during the fingerprint sensing stage.

40. The driving circuit according to claim 39, wherein the display electrodes of the second sub-pixel units are defined as second electrodes;

the driving circuit is configured to control the second control switches connected with the second scanning lines to be switched off during the fingerprint sensing stage, control the fingerprint sensing control circuit to send the fingerprint sensing control signal to the first scanning lines to switch on the first control switches, and control the fingerprint sensing detection circuit to send the fingerprint sensing signal to the first data lines.

41. The driving circuit according to claim 40, wherein the display panel comprises a plurality of second sub-pixel units connected with the first scanning lines and the second data lines;

the second control switches of the second sub-pixel units connected with the first scanning lines are switched on when the fingerprint sensing control circuit sends the fingerprint sensing control signal to the first scanning lines; and

the driving circuit is further configured to control the data line driving circuit to send the display signals to the second data lines, and the second data lines transmit the display signals to the second electrodes of the second sub-pixel units connected with the first scanning lines.

42. The driving circuit according to claim 41, wherein the fingerprint sensing control signal is a pulse signal having the same frequency and the same phase as the fingerprint sensing signal, and is for switching on the first control switches during the fingerprint sensing and reducing electric quantities in charging and discharging capacitors formed by the first scanning lines and the first electrodes;

or the fingerprint sensing control signal is a pulse signal having the same frequency, the same phase, and the same amplitude as the fingerprint sensing signal, and is for switching on the first control switches during the fingerprint sensing and reducing electric quantities in charging and discharging capacitors formed by the first scanning lines and the first electrodes.

43. The driving circuit according to claim 39, wherein the fingerprint sensing detection circuit is configured to perform the fingerprint sensing on one first sub-pixel unit in the display panel, or is configured to perform the fingerprint sensing on more than one first sub-pixel unit in the display panel simultaneously.

44. The driving circuit according to claim 43, wherein the display panel comprises a plurality of the first sub-pixel units and a plurality of the second sub-pixel units, the first sub-pixel units comprise first red sub-pixel units, first green sub-pixel units and first blue sub-pixel units, and the second sub-pixel units comprise second red sub-pixel units, second green sub-pixel units and second blue sub-pixel units;

the display panel comprises first pixel units and second pixel units, the first pixel units are located within the predetermined region and are configured to implement the fingerprint sensing and image display, each first pixel unit comprises one first red sub-pixel unit, one first green sub-pixel unit and one first blue sub-pixel unit, and each second pixel unit comprises one second red sub-pixel unit, one second green sub-pixel unit and one second blue sub-pixel unit; and

the fingerprint sensing detection circuit is configured to perform the fingerprint sensing on all sub-pixel units of one first pixel unit simultaneously.

45. The driving circuit according to claim 44, wherein the first control switches and the second control switches are poly-silicon thin film transistors, the first control switches of the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit in one first pixel unit are connected with different first scanning lines respectively and connected with an identical first data line;

the fingerprint sensing control circuit provides the fingerprint sensing control signal simultaneously to three first scanning lines respectively connected with the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit in one first pixel unit, to simultaneously switch on the first control switches of the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit in the one first pixel unit; and

the fingerprint sensing detection circuit provides the fingerprint sensing signal to the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit in the one first pixel unit via the identical first data line.

46. The driving circuit according to claim 43, wherein the fingerprint sensing detection circuit comprises:

an operational amplifier;

a reference voltage source connected with a non-inverting input terminal of the operational amplifier and configured to provide a reference voltage;

a feedback capacitor having one plate connected to an inverting input terminal of the operational amplifier and the other plate connected to an output terminal of the operational amplifier;

a first switch having one terminal connected to the first data line and the other terminal connected to a first voltage source for outputting a first voltage, wherein a first node is defined between the first switch and the first data line, and the first voltage is greater than or smaller than the reference voltage;

a second switch having one terminal connected to the first node and the other terminal connected to the inverting input terminal of the operational amplifier;

a third switch connected in parallel with the feedback capacitor; and

a controller configured to output a first control signal and a second control signal in a time division mode, wherein the first control signal is configured to switch on the first switch and the third switch and to switch off the second switch, and the second control signal is configured to switch on the second switch and to switch off the first switch and the third switch.

47. The driving circuit according to claim 39, wherein:

one fourth switch is provided between each first data line and the data line driving circuit, and one fifth switch is provided between each first data line and the fingerprint sensing detection circuit; and

the driving circuit is configured to, control the fourth switches to be switched on and the fifth switches to be switched off during the image display stage, and control the fifth switches to be switched on and the fourth switches to be switched off during the fingerprint sensing stage.

48. The driving circuit according to claim 39, wherein the first signal is a pulse signal having the same frequency and the same phase as the fingerprint sensing signal, or the first signal is a pulse signal having the same frequency, the same phase, and the same amplitude as the fingerprint sensing signal.

49. The driving circuit according to claim 39, wherein a sixth switch is provided between the common voltage generation circuit and the common electrode, and a seventh switch is provided between the fingerprint sensing detection circuit and the common electrode;

and

the driving circuit controls the sixth switch to be switched on and the seventh switch to be switched off during the image display stage, and controls the seventh switch to be switched on and the sixth switch to be switched off during the fingerprint sensing stage.

50. The driving circuit according to claim 39, wherein the fingerprint sensing detection circuit comprises a plurality of fingerprint sensing detection modules, each fingerprint sensing detection module is configured to perform the fingerprint sensing on one first sub-pixel unit or is configured to perform the fingerprint sensing on more than one first sub-pixel unit simultaneously, and the fingerprint sensing detection module is configured to output the fingerprint sensing signal and output the first signal;

the fingerprint sensing detection module comprises;

an operational amplifier;

a reference voltage source connected with a non-inverting input terminal of the operational amplifier and configured to provide a reference voltage;

a feedback capacitor having one plate connected to an inverting input terminal of the operational amplifier and the other terminal connected to an output terminal of the operational amplifier;

a first switch having one terminal connected to the first data line and the other terminal connected to a first voltage source for outputting a first voltage, wherein a first node is defined between the first switch and the first data line;

a second switch having one terminal connected to the first node and the other terminal connected to the inverting input terminal of the operational amplifier;

an eighth switch having one terminal connected to the common electrode and the other terminal connected to a second voltage source for outputting a second voltage, wherein a second node is defined between the eighth switch and the common electrode, and both the first voltage and the second voltage are smaller than or greater than the reference voltage;

a ninth switch having one terminal connected to the second node and the other terminal connected to the reference voltage source;

a third switch connected in parallel with the feedback capacitor; and

a controller configured to output a third control signal and a fourth control signal in a time division mode, wherein the third control signal is configured to switch on the first switch, the eighth switch and the third switch and to switch off the second switch and the ninth switch, and the fourth control signal is configured to switch on the second switch and the ninth switch and to switch off the first switch, the eighth switch and the third switch.

51. The driving circuit according to claim 39, wherein:

the display device further comprises a touch-sensitive unit, the touch-sensitive unit being stacked on the display panel or being a part of the display panel;

the driving circuit further comprises a touch driving circuit configured to perform a touch detection on the touch-sensitive unit; and

the driving circuit is connected with the touch driving circuit, and is configured to control the image display, the touch detection, and the fingerprint sensing in a time division mode, to implement the image display stage, a touch detection stage and the fingerprint sensing stage respectively.

52. The driving circuit according to claim 51, wherein the common electrode serves as a self-capacitive electrode for the touch detection;

and

the touch driving circuit is connected with the common electrode and is configured to provide a self-capacitive touch detection signal to the common electrode.

53. The driving circuit according to claim 52, wherein a sixth switch is provided between the common electrodes and the common voltage generation circuit, a seventh switch is provided between the fingerprint sensing detection circuit and the common electrodes, and a tenth switch is provided between the common electrodes and the touch driving circuit;

and

the driving circuit is configured to control the sixth switch to be switched on and the seventh switch and the tenth switch to be switched off during the image display stage, control the tenth switch to be switched on and the sixth switch and the seventh switch to be switched off during the touch detection stage, and control the seventh switch to be switched on and the sixth switch and the tenth switch to be switched off during the fingerprint sensing stage.

54. The driving circuit according to claim 52, further comprising a second signal generation circuit connected with the first scanning lines and the second scanning lines and configured to provide a second signal,

wherein the driving circuit is configured to control the second signal generation circuit to provide the second signal to the first scanning lines and the second scanning lines during the touch detection, the control switches are controlled to be in a switched-off state due to the second signal, and electric quantities in charging and discharging capacitors formed by the common electrodes and the first scanning lines, and electric quantities in charging and discharging capacitors formed by the common electrodes and the second scanning lines are reduced due to the second signal.

55. The driving circuit according to claim 54, wherein the second signal is a pulse signal having the same frequency and the same phase as the touch detection signal, or the second signal is a pulse signal having the same frequency, the same phase, and the same amplitude as the touch detection signal.

56. The driving circuit according to claim 52, further comprising a third signal generation circuit connected with the first data lines and the second data lines and configured to provide a third signal,

wherein the driving circuit is configured to control the third signal generation circuit to provide the third signal to the first data lines and the second data lines during the touch detection, electric quantities in charging and discharging capacitors formed by the common electrodes and the first data lines and electric quantities in charging and discharging capacitors formed by the common electrodes and the second data lines are reduced due to the third signal.

57. The driving circuit according to claim 56, wherein the third signal is a pulse signal having the same frequency and the same phase as the touch detection signal, or the third signal is a pulse signal having the same frequency, the same phase, and the same amplitude as the touch detection signal.

58. The driving circuit according to claim 37, wherein the driving circuit is further configured to provide the display signals corresponding to fingerprint information to the display electrodes, to display a fingerprint image, after the driving circuit completes the fingerprint sensing or when the driving circuit performs the fingerprint sensing.

59. The driving circuit according to claim 37, wherein the driving circuit provides the fingerprint sensing signal to the first electrodes to perform the fingerprint sensing, and stops outputting the display signals to the first electrodes or disconnects from the first electrodes to stop outputting the display signals to the first electrodes, during the fingerprint sensing stage.

60. The driving circuit according to claim 59, wherein the driving circuit outputs the display signals to the first electrodes to perform the image display, and stops outputting the fingerprint sensing signal to the first electrodes or disconnects from the first electrodes to stop outputting the fingerprint sensing signal to the first electrodes, during the image display stage.

61. A method for driving a display device, wherein the display device comprises a display panel provided with a plurality of display electrodes, the display electrodes are configured to display images, the display electrodes located within a predetermined region of the display panel are defined as first electrodes, the first electrodes are configured to implement a fingerprint sensing, and a stage during which the first electrodes perform the fingerprint sensing is defined as a fingerprint sensing stage, wherein a stage during which the first electrodes perform image display is defined as an image display stage, the display panel is further provided with a common electrode, and the common electrode and each display electrode serve as two polar plates of one sub-pixel unit in the display panel;

and

the method comprises;

providing display signals to the display electrodes to display the images, wherein the display signals are pixel voltages; and

providing a fingerprint sensing signal to the first electrodes and performing a self-capacitance detection on the first electrodes during the fingerprint sensing stage, to implement the fingerprint sensing, wherein the process of providing the display signals to the display electrodes to display the images comprises;

providing a common voltage to the common electrode, wherein the two polar plates of each sub-pixel unit are applied with the common voltage and one of the pixel voltages respectively to display the images; and

the process of providing the fingerprint sensing signal to the first electrodes and performing the self-capacitance detection on the first electrodes during the fingerprint sensing stage, to implement the fingerprint sensing comprises;

providing a first signal to the common electrode during the fingerprint sensing stage, for reducing electric quantities in charging and discharging capacitors formed by the first electrodes and the common electrode during the fingerprint sensing.

62. The method according to claim 61, wherein

the display panel is further provided with scanning lines arranged in rows, data lines arranged in columns, and control switches connected with the scanning lines and the data lines, each control switch comprises a control terminal, a first terminal, and a second terminal, the control terminal being configured to control whether a signal is transmittable between the first terminal and the second terminal, the control terminals of the control switches are connected with the scanning lines, the first terminals are connected with the data lines, and the second terminals are correspondingly connected with the display electrodes;

the process of providing display signals to the display electrodes to display the images comprises;

sending scanning driving signals to the scanning lines to switch on the control switches; and

sending the display signals to the data lines and transmitting the display signals to the display electrodes through the control switches that are switched on.

63. The method according to claim 62, wherein each sub-pixel unit comprises one display electrode and the control switch connected with the display electrode, sub-pixel units comprising the first electrodes are defined as first sub-pixel units and other sub-pixel units are defined as second sub-pixel units, the control switches in the first sub-pixel units are defined as first control switches, the control switches in the second sub-pixel units are defined as second control switches, the scanning lines connected with the first sub-pixel units are defined as first scanning lines, the scanning lines connected with the second sub-pixel units but not connected with the first sub-pixel units are defined as second scanning lines, the data lines conned with the first sub-pixel units are defined as first data lines, and the data lines connected with the second sub-pixel units but not connected with the first sub-pixel units are defined as second data lines;

the process of providing the fingerprint sensing signal to the first electrodes and performing the self-capacitance detection on the first electrodes during the fingerprint sensing stage, to implement the fingerprint sensing comprises;

providing a fingerprint sensing control signal to switch on the first control switches; and

providing the fingerprint sensing signal and transmitting the fingerprint sensing signal to the first electrodes through the first control switches that are switched on, to perform the fingerprint sensing.

64. The method according to claim 63, wherein the display electrodes of the second sub-pixel units are defined as second electrodes, and

the process of providing the fingerprint sensing signal to the first electrodes and performing the self-capacitance detection on the first electrodes during the fingerprint sensing stage, to implement the fingerprint sensing comprises:

controlling the second control switches connected with the second scanning lines to be switched off during the fingerprint sensing stage; and

sending the fingerprint sensing control signal to the first scanning lines to switch on the first control switches and sending the fingerprint sensing signal to the first data lines.

65. The method according to claim 64, wherein the display panel comprises a plurality of second sub-pixel units connected with the first scanning lines and the second data lines,

the second control switches of the second sub-pixel units connected with the first scanning lines are switched on when the fingerprint sensing control signal is sent to the first scanning lines;

and

the method further comprises;

sending the display signals to the second data lines and transmitting the display signals to the second electrodes of the second sub-pixel units connected with the first scanning lines.

66. The method according to claim 63, wherein the process of providing the fingerprint sensing signal to the first electrodes and performing the self-capacitance detection on the first electrodes during the fingerprint sensing stage, to implement the fingerprint sensing comprises:

performing the fingerprint sensing on one first sub-pixel unit in the display panel, or performing the fingerprint sensing on more than one first sub-pixel unit in the display panel simultaneously.

67. The method according to claim 66, wherein the display panel comprises a plurality of the first sub-pixel units and a plurality of the second sub-pixel units, the first sub-pixel units comprise first red sub-pixel units, first green sub-pixel units and first blue sub-pixel units, and the second sub-pixel units comprise second red sub-pixel units, second green sub-pixel units and second blue sub-pixel units;

the display panel comprises first pixel units and second pixel units, the first pixel units are located within the predetermined region and are configured to implement the fingerprint sensing and image display, each first pixel unit comprises one first red sub-pixel unit, one first green sub-pixel unit and one first blue sub-pixel unit, and each second pixel unit comprises one second red sub-pixel unit, one second green sub-pixel unit and one second blue sub-pixel unit; and

the process of providing the fingerprint sensing signal to the first electrodes and performing the self-capacitance detection on the first electrodes during the fingerprint sensing stage, to implement the fingerprint sensing comprises;

performing the fingerprint sensing on all sub-pixel units of one first pixel unit simultaneously.

68. The method according to claim 67, wherein the first control switches and the second control switches are poly-silicon thin film transistors, the first control switches of the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit in one first pixel unit are connected with different first scanning lines respectively and connected with an identical first data line;

and

the process of providing the fingerprint sensing signal to the first electrodes and performing the self-capacitance detection on the first electrodes during the fingerprint sensing stage, to implement the fingerprint sensing comprises;

providing the fingerprint sensing control signal simultaneously to three first scanning lines respectively connected with the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit in the one first pixel unit, to simultaneously switch on the first control switches of the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit in the one first pixel unit; and

providing the fingerprint sensing signal to the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit in the one first pixel unit via the identical first data line.

69. The method according to claim 63, wherein the fingerprint sensing control signal is a pulse signal having the same frequency and the same phase as the fingerprint sensing signal, and is for switching on the first control switches during the fingerprint sensing and reducing electric quantities in charging and discharging capacitors formed by the first scanning lines and the first electrodes;

or the fingerprint sensing control signal is a pulse signal having the same frequency, the same phase and the same amplitude as the fingerprint sensing signal, and is for switching on the first control switches during the fingerprint sensing and reducing electric quantities in charging and discharging capacitors formed by the first scanning lines and the first electrodes.

70. The method according to claim 63, wherein:

the display device further comprises a touch-sensitive unit, the touch-sensitive unit being stacked on the display panel or being a part of the display panel; and

the method further comprises;

performing a touch detection on the touch-sensitive unit, and

driving the image display stage, a touch detection stage and the fingerprint sensing stage in a time division mode.

71. The method according to claim 70, wherein the common electrode serves as a self-capacitive electrode for the touch detection,

wherein the process of performing a touch detection on the touch-sensitive unit comprises:

providing a self-capacitive touch detection signal to the common electrode.

72. The method according to claim 71, wherein the process of providing a self-capacitive touch detection signal to the common electrodes comprises:

providing a second signal to the first scanning lines and the second scanning lines during the touch detection, wherein the control switches are controlled to be in a switched-off state due to the second signal, and electric quantities in charging and discharging capacitors formed by the common electrodes and the first scanning lines, and electric quantities in charging and discharging capacitors formed by the common electrodes and the second scanning lines are reduced.

73. The method according to claim 72, wherein the second signal is a pulse signal having the same frequency and the same phase as the touch detection signal, or the second signal is a pulse signal having the same frequency, the same phase, and the same amplitude as the touch detection signal.

74. The method according to claim 71, wherein the process of providing a self-capacitive touch detection signal to the common electrodes comprises:

providing a third signal to the first data lines and the second data lines, wherein electric quantities in charging and discharging capacitors formed by the common electrodes and the first data lines and electric quantities in charging and discharging capacitors formed by the common electrodes and the second data lines are reduced due to the third signal.

75. The method according to claim 74, wherein the third signal is a pulse signal having the same frequency and the same phase as the touch detection signal, or the third signal is a pulse signal having the same frequency, the same phase, and the same amplitude as the touch detection signal.

76. The method according to claim 61, wherein the first signal is a pulse signal having the same frequency and the same phase as the fingerprint sensing signal, or the first signal is a pulse signal having the same frequency, the same phase, and the same amplitude as the fingerprint sensing signal.

77. The method according to claim 61, further comprising:

providing the display signals corresponding to fingerprint information to the display electrodes to display a fingerprint image, after a completion of the fingerprint sensing or when performing the fingerprint sensing.

78. A display device, comprising:

a display panel comprising a plurality of pixel units and a plurality of data lines connected with the pixel units, wherein each pixel unit comprises one display electrode, the display electrodes are configured to display images, the pixel units located within a predetermined region of the display panel are defined as first pixel units, the display electrodes of the first pixel units are defined as first electrodes, and the first electrodes are configured to implement a fingerprint sensing, wherein a stage during which the first electrodes perform image display is define as an image display stage, the display panel is further provided with a common electrode, and the common electrode and each display electrode serve as two polar plates of one sub-pixel unit in the display panel; and

a data line driving circuit connected with the pixel units via the data lines, wherein the data line driving circuit is configured to provide display signals to the display electrodes of the pixel units via the data lines to display the images, wherein the display signals are pixel voltages;

wherein the display panel further comprises transmission lines, and the display device further comprises;

a fingerprint sensing detection circuit connected with the first pixel units via the transmission lines, the fingerprint sensing detection circuit being configured to provide a fingerprint sensing signal to the first electrodes of the first pixel units via the transmission lines and implement a fingerprint sensing by detecting self-capacitances of the first electrodes;

wherein the display device further comprises a common voltage generation circuit connected with the common electrode and configured to provide a common voltage to the common electrode, wherein the two polar plates of each sub-pixel unit are applied with the common voltage and one of the pixel voltages respectively, to display the images; and

a first signal generation circuit connected with the common electrode and configured to provide a first signal, wherein the display device is further configured to;

control the first electrodes to perform the fingerprint sensing or image display; and

control the common voltage generation circuit to provide the common voltage to the common electrode during the image display stage; and

control the first signal generation circuit to provide the first signal to the common electrode during the fingerprint sensing stage, for reducing electric quantities in charging and discharging capacitors formed by the first electrodes and the common electrode during the fingerprint sensing.

79. The display device according to claim 78, further comprising first switches and second switches, wherein each data line is connected with the data line driving circuit via one first switch, each transmission line is connected with the fingerprint sensing detection circuit via one second switch, a stage during which the first electrodes perform the fingerprint sensing is defined as a fingerprint sensing stage, the display device controls the first switches to be switched off and the second switches to be switched on during the fingerprint sensing stage, and the display device controls the first switches to be switched on and the second switches to be switched off during the image display stage.