CN107656169B

CN107656169B - Display panel, display device and detection method of display panel

Info

Publication number: CN107656169B
Application number: CN201711064769.XA
Authority: CN
Inventors: 邹宗骏; 孙莹; 许育民
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2017-11-02
Filing date: 2017-11-02
Publication date: 2021-03-16
Anticipated expiration: 2037-11-02
Also published as: CN107656169A

Abstract

The embodiment of the invention discloses a display panel, a display device and a detection method of the display panel. Wherein, the display panel includes: the pressure sensor comprises n pressure sensing units, a first switch unit, a second switch unit and a third switch unit, wherein the first end of the ith pressure sensing unit is electrically connected with the first end of the ith first switch unit, the second end of the ith pressure sensing unit is electrically connected with the second end of the ith second switch unit, the third end of each pressure sensing unit is electrically connected with a third test terminal, the fourth end of each pressure sensing unit is electrically connected with a fourth test terminal, the second end of each first switch unit is electrically connected with the first test terminal, and the first end of each second switch unit is electrically connected with the second test terminal; and the control end of the ith first switch unit and the control end of the ith second switch unit are electrically connected with the trigger signal output end of the scanning unit at the same level. The technical scheme provided by the embodiment of the invention can accurately position the abnormal pressure sensing unit.

Description

Display panel, display device and detection method of display panel

Technical Field

The present invention relates to display technologies, and in particular, to a display panel, a display device, and a method for detecting a display panel.

Background

At present, a display panel with a touch function is widely applied to various display products such as mobile phones, tablet computers, information query machines in public halls and the like as an information input tool.

In order to better satisfy the user requirement, a pressure sensing unit for detecting the magnitude of touch pressure when a user touches the touch display panel is usually arranged in the touch display panel, so that the display panel can not only collect touch position information, but also collect the magnitude of touch pressure, thereby enriching the application range of the touch display technology. The pressure sensing unit is generally provided as a bridge. In the manufacturing process of a display panel, a pressure touch function needs to be detected, and whether a pressure touch circuit is abnormal or not is detected.

Disclosure of Invention

The invention provides a display panel, a display device and a detection method of the display panel, which are used for realizing pressure touch detection of the display panel in the manufacturing process, judging whether a pressure sensing unit is poor or abnormal in advance and accurately determining the position of the abnormal pressure sensing unit.

In a first aspect, an embodiment of the present invention provides a display panel, including:

the pressure sensing unit comprises n pressure sensing units, n first switch units, n second switch units and n third switch units, wherein n is an integer greater than 1;

a first test terminal, a second test terminal, a third test terminal, and a fourth test terminal;

a first end of the ith pressure sensing unit is electrically connected with a first end of the ith first switch unit, a second end of the ith pressure sensing unit is electrically connected with a second end of the ith second switch unit, a third end of each pressure sensing unit is electrically connected with the third test terminal, a fourth end of each pressure sensing unit is electrically connected with the fourth test terminal, a second end of each first switch unit is electrically connected with the first test terminal, and a first end of each second switch unit is electrically connected with the second test terminal;

the scanning unit comprises a trigger signal output end which is used for outputting a trigger signal to the next scanning unit so as to control the next scanning unit to output the scanning signal;

the control end of the ith first switch unit and the control end of the ith second switch unit are electrically connected with the trigger signal output end of the scanning unit at the same stage, and different first switch units are electrically connected with the trigger signal output ends of the scanning units at different stages; wherein i is more than or equal to 1 and less than or equal to n.

In a second aspect, embodiments of the present invention further provide a display device, where the display device includes the display panel provided in any embodiment of the present invention.

In a third aspect, an embodiment of the present invention further provides a detection method for a display panel, where the detection method is applicable to the display panel provided in any embodiment of the present invention, and the detection method includes:

in a pressure touch control abnormity detection stage, inputting a test signal to the first test terminal, respectively receiving a signal of the second test terminal, a signal of the third test terminal and a signal of the fourth test terminal when the ith first switch unit and the ith second switch unit are turned on, and determining an abnormal condition of the ith pressure sensing unit according to at least one of the signal of the second test terminal, the signal of the third test terminal and the signal of the fourth test terminal;

or, a test signal is input to the second test terminal, and when the ith first switch unit and the ith second switch unit are turned on, the test signal is received from the first test terminal, the signal from the third test terminal, and the signal from the fourth test terminal, respectively, and the abnormal condition of the ith pressure sensing unit is determined according to at least one of the signal from the first test terminal, the signal from the third test terminal, and the signal from the fourth test terminal.

In a fourth aspect, an embodiment of the present invention further provides a method for detecting a display panel, where the method for detecting a display panel can be applied to the display panel provided in any embodiment of the present invention, and the method for detecting a display panel includes:

when the ith first switch unit and the ith second switch unit are conducted in a pressure touch control abnormity detection stage, at least one of the resistance between a first test terminal and a second test terminal, the resistance between the first test terminal and a third test terminal and the resistance between the second test terminal and the third test terminal is detected, and the abnormity condition of the ith pressure sensing unit is determined.

The invention realizes the detection of the pressure sensing units one by one through the control signal provided by the scanning unit and accurately positions the abnormal pressure sensing units. And each pressure sensing unit shares first test terminal, second test terminal, third test terminal and fourth test terminal, can reduce the quantity of test terminal on the display panel, realizes display panel's narrow frame design.

Drawings

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

FIG. 2 is a signal waveform diagram provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

fig. 4 is a circuit diagram of a pressure sensing unit according to an embodiment of the present invention;

FIG. 5 is a circuit diagram of another pressure sensing unit provided by an embodiment of the present invention;

FIG. 6 is an equivalent circuit diagram of a pressure sensing unit according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

fig. 12 is a schematic diagram of a display device according to an embodiment of the present invention;

FIG. 13 is a flowchart illustrating a method for inspecting a display panel according to an embodiment of the present invention;

FIG. 14 is a flowchart illustrating another method for inspecting a display panel according to an embodiment of the present invention;

fig. 15 is a flowchart illustrating another display panel detection method according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, where the display panel includes:

the pressure sensing unit comprises n pressure sensing units 10, n first switch units 11 and n second switch units 12, wherein n is an integer greater than 1;

a first test terminal 21, a second test terminal 22, a third test terminal 23, and a fourth test terminal 24;

the first end a1 of the ith pressure sensing unit 10 is electrically connected with the first end of the ith first switch unit 11, the second end a2 of the ith pressure sensing unit 10 is electrically connected with the second end of the ith second switch unit 12, the third end B1 of each pressure sensing unit 10 is electrically connected with the third test terminal 23, the fourth end B2 of each pressure sensing unit 10 is electrically connected with the fourth test terminal 24, the second end of each first switch unit 11 is electrically connected with the first test terminal 21, and the first end of each second switch unit 12 is electrically connected with the second test terminal 22;

the scanning unit 31 is configured to output a scanning signal step by step, the scanning unit 31 includes a trigger signal output terminal next, the trigger signal output terminal next of the previous scanning unit 31 is electrically connected to a trigger signal input terminal stv of the next scanning unit 31, and is configured to output a trigger signal to the next scanning unit 31 to control the next scanning unit 31 to output a scanning signal; the output end out of the scan unit 31 may be electrically connected to a scan line on the display panel, and a scan signal output by the output end out of the scan unit 31 is transmitted to the scan line to charge the scan line, so as to turn on the pixel electrically connected to the scan line, so that a data signal voltage can be written into the pixel to control the pixel to emit light for display. Among them, the scan unit 31 may be a shift register that outputs a scan signal.

The control end of the ith first switch unit 11 and the control end of the ith second switch unit 12 are electrically connected with the trigger signal output end next of the scanning unit 31 at the same level, and different first switch units 11 are electrically connected with the trigger signal output ends next of the scanning units 31 at different levels; wherein i is more than or equal to 1 and less than or equal to n.

Fig. 1 exemplarily shows 4 pressure sensing units 10. In fig. 1, from top to bottom, the 1 st to 4 th pressure sensing units 10 are arranged in sequence. In the display panel provided in the embodiment of the present invention, the number of the pressure sensing units 10 may be adaptively configured according to actual needs. In the embodiment of the present invention, the first switch unit 11 and the second switch unit 12 may be turned on according to a high level input by the control terminals thereof, and turned off according to a low level input by the control terminals thereof; or the first switch unit 11 and the second switch unit 12 are turned on according to the low level input by the control terminal thereof and turned off according to the high level input by the control terminal. Fig. 2 is a schematic diagram of signals output by the trigger signal output terminal of the scan cell according to an embodiment of the present invention. Wherein, next1, next2, next3 and next4 respectively represent signals output from the next trigger signal output terminal of the scan cell 31 electrically connected to the 1 st to 4 th first switch cells 11 in fig. 1. Referring to fig. 1 and 2, the first switching unit 11 is turned on when the control terminal of the first switching unit 11 inputs a high level, and the second switching unit 12 is turned on when the control terminal of the second switching unit 12 inputs a high level, for example. In the stage t1, next is high, the 1 st first switching unit 11 and the 1 st second switching unit 12 are turned on, and the other first switching units 11 and the other second switching units 12 are turned off. The first test terminal 21 inputs a test signal, the test signal is transmitted to the first end a1 of the 1 st pressure sensing unit 10 through the turned-on 1 st first switch unit 11, and by receiving signals of the second test terminal 22, the third test terminal 23 and the fourth test terminal 24, whether the 1 st pressure sensing unit 10 is abnormal, that is, whether a defect occurs is determined according to the signals of the second test terminal 22, the third test terminal 23 and the fourth test terminal 24. For example, the signal of the second test terminal 22, the signal of the third test terminal 23, and the signal of the fourth test terminal 24 are compared with the detection signal input from the first test terminal 21 to determine whether the ith pressure-sensing cell is abnormal, or the ith pressure-sensing cell 10 is determined to be abnormal according to the resistance between the first test terminal 21 and the second test terminal 22, the resistance between the first test terminal 21 and the third test terminal 23, and the resistance between the first test terminal and the fourth test terminal 24. In the stage t2, next2 is high, the 2 nd first switching unit 11 and the 2 nd second switching unit 12 are turned on, and the other first switching units 11 and the second switching units 12 are turned off. The first test terminal 21 inputs a test signal, the test signal is transmitted to the first end a1 of the 2 nd pressure sensing unit 10 through the turned-on 2 nd first switching unit 11, and whether the 2 nd pressure sensing unit 10 is abnormal is determined according to the signal of the second test terminal 22, the signal of the third test terminal 23 and the signal of the fourth test terminal 24 by receiving the signals of the second test terminal 22, the third test terminal 23 and the fourth test terminal 24. In the stage t3, next3 is high, the 3 rd first switching unit 11 and the 3 rd second switching unit 12 are turned on, and the other first switching units 11 and the other second switching units 12 are turned off. A test signal is input to the first test terminal 21, the test signal is transmitted to the first end of the 3 rd pressure sensing unit 10 through the turned-on 3 rd first switch unit 11, and whether the 3 rd pressure sensing unit 10 is abnormal is determined according to the signal of the second test terminal 22, the signal of the third test terminal 23 and the signal of the fourth test terminal 24 by receiving the signals of the second test terminal 22, the third test terminal 23 and the fourth test terminal 24. In the t4 stage, next4 is high level, the 4 th first switching unit 11 and the 4 th second switching unit 12 are turned on, and the other first switching units 11 and the second switching units 12 are turned off. The first test terminal 21 inputs a test signal, the test signal is transmitted to the first end a1 of the 4 th pressure sensing unit 10 through the turned-on 4 th first switch unit 11, and whether the 4 th pressure sensing unit 10 is abnormal is determined according to the signal of the second test terminal 22, the signal of the third test terminal 23 and the signal of the fourth test terminal 24 by receiving the signals of the second test terminal 22, the third test terminal 23 and the fourth test terminal 24.

In another embodiment of the present invention, the test signal may be input to the second test terminal 22, and the signal of the first test terminal 21, the signal of the third test terminal 23, and the signal of the fourth test terminal 24 may be detected to determine whether the pressure sensing unit 10 is abnormal. Or detecting the resistance between the first test terminal 21 and the second test terminal 22, detecting the first test terminal 21 and the third test terminal 23, detecting the resistance between the first test terminal 21 and the fourth test terminal 24, and further determining whether the pressure sensing unit 10 is abnormal. In addition, although the third end B1 of each pressure sensing cell 10 is electrically connected to the third test terminal 21, the fourth end B2 of each pressure sensing cell 10 is electrically connected to the fourth test terminal 24. When one of the pressure sensing units 10 is detected, the first switch unit 11 and the second switch unit 12 electrically connected to the other pressure sensing units 10 are both turned off, and the test signal on the first test terminal 21 cannot be transmitted to the first ends of the other pressure sensing units 10, so that the other pressure sensing units 10 cannot affect the currently detected pressure sensing unit. It can be seen that a plurality of pressure sensing units 10 can share the first test terminal 21, the second test terminal 22, the third test terminal 23 and the fourth test terminal 24, so that the number of test terminals is reduced, and the narrow frame design of the display panel is easy to implement. When a test signal is input to the first test terminal 21 or the second test terminal 22 and a signal of the third test terminal 23 and a signal of the fourth test terminal 24 are received, a test probe of a test device may be brought into contact with the first test terminal 21, the second test terminal 22, the third test terminal 23 and the fourth test terminal 24, the test signal may be output to the first test terminal 21 or the second test terminal 22 through the test probe, and the signal of the third test terminal 23 and the signal of the fourth test terminal 24 may be received through the test probe.

According to the technical scheme provided by the embodiment of the invention, when the scanning unit outputs the trigger signal, each pressure sensing unit can be detected through the first test terminal, the second test terminal, the third test terminal and the fourth test terminal, so that whether the pressure sensing sensor is poor or not can be judged in advance. The scanning units output the trigger signals one by one, the pressure sensing units are detected one by one, the pressure sensing units can be accurately determined, the positions of the failure pressure sensing units can be accurately determined, and the problems of error detection and omission of detection of the existing pressure sensing units are solved. In addition, the number of the test terminals is reduced by time division multiplexing of the connecting terminals, so that the realization of a narrow frame is facilitated.

Further, referring to fig. 3, fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention. The first switching unit 11 includes a first transistor M1, and the second switching unit 12 includes a second transistor M2; a first electrode, a second electrode and a gate of the first transistor M1 are electrically connected to a first terminal, a second terminal and a control terminal of the first switching unit 11, respectively; the first electrode, the second electrode, and the gate of the second transistor M2 are electrically connected to the first terminal, the second terminal, and the control terminal of the second switching unit 12, respectively.

Fig. 4 is a schematic structural diagram of a pressure sensing unit according to an embodiment of the present invention, referring to fig. 4, the pressure sensing unit includes a first sensing resistor R1, a second sensing resistor R2, a third sensing resistor R3, and a fourth sensing resistor R4;

the first end of the first sensing resistor R1 and the first end of the third sensing resistor R3 are electrically connected to the first end a1 of the pressure sensing unit, the second end of the first sensing resistor R1 and the first end of the second sensing resistor R2 are electrically connected to the third end B1 of the pressure sensing unit, the second end of the second sensing resistor R2 and the second end of the fourth sensing resistor R4 are electrically connected to the second end a2 of the pressure sensing unit, and the second end of the third sensing resistor R3 and the first end of the fourth sensing resistor R4 are electrically connected to the fourth end B2 of the pressure sensing unit.

The following describes a specific process of detecting a pressure sensing unit according to an embodiment of the present invention, taking the 1 st pressure sensing unit as an example, with reference to fig. 1, fig. 2, and fig. 4.

At the stage t1, when the 1 st first switch unit 11 and the 1 st second switch unit 12 are turned on, the test signal TX at the first test terminal 21 is transmitted to the first end of the pressure sensing unit 10 through the turned-on 1 st first switch unit 11, and it is determined whether the pressure sensing unit 10 is abnormal by sequentially detecting the signal at the second test terminal 22, the signal at the third test terminal 23, and the signal at the fourth test terminal 24. Specifically, if the amplitude of the signal of the second test terminal 22 is detected to be greater than the first threshold, for example, when the amplitude of the test signal is aV, the first threshold may be 0.95aV, which indicates that a short circuit may occur between the second test terminal 22 and the first test terminal 21, i.e. a short circuit occurs in the circuit between the first end a1 and the second end a2 of the pressure sensing unit 10; if the amplitude of the signal of the second test terminal 22 is detected to be greater than or equal to the second threshold value and less than or equal to the first threshold value, for example, the second threshold value may be 0.5aV, the circuits of the first end a1 and the second end a2 of the pressure sensing unit 10 are normal; if the amplitude of the signal of the second test terminal 22 is detected to be greater than zero and smaller than the second threshold, it indicates that the circuit between the first end a1 and the second end a2 of the pressure sensing unit 10 is in a high impedance state; if the amplitude of the signal of the second test terminal 22 is detected to be zero, it is characterized that there is an open circuit in the electrical circuit between the first end A1 and the second end A2 of the pressure sensing cell 10. When detecting the signal of the third test terminal 23, if the amplitude of the signal of the third test terminal 23 is detected to be greater than the first threshold, it is characterized that the short circuit occurs in the circuit between the third test terminal 23 and the first test terminal 21, that is, the short circuit occurs in the circuit between the third terminal B1 and the first terminal a1 of the pressure sensing unit 10; if the amplitude of the signal of the third test terminal 23 is detected to be greater than or equal to the second threshold value and less than or equal to the first threshold value, the circuit characterizing the first end a1 and the third end B1 of the pressure sensing unit 10 is normal; if the amplitude of the signal of the third test terminal 23 is detected to be greater than zero and smaller than the second threshold, it indicates that the circuit between the first end a1 and the third end B1 of the pressure sensing unit 10 is in a high impedance state; if the amplitude of the signal of the third test terminal 23 is detected to be zero, there is an open circuit in the circuit characterizing the first terminal a1 and the third terminal B1 of the pressure sensing unit 10. When detecting the signal of the fourth test terminal 24, if the amplitude of the signal of the fourth test terminal 24 is detected to be greater than the first threshold, it is characterized that the short circuit occurs in the circuit between the fourth test terminal 24 and the first test terminal 21, that is, the short circuit occurs in the circuit between the fourth terminal B2 and the first terminal a1 of the pressure sensing unit 10; if the amplitude of the signal of the fourth test terminal 24 is detected to be greater than or equal to the second threshold value and less than or equal to the first threshold value, it is characterized that the circuits of the first end a1 and the fourth end B2 of the pressure sensing unit 10 are normal; if the amplitude of the signal of the fourth test terminal 24 is detected to be greater than zero and smaller than the second threshold, the circuit representing the first end a1 and the fourth end B2 of the pressure sensing unit 10 is in a high impedance state; if the amplitude of the signal of the fourth test terminal 24 is detected to be zero, an open circuit exists in the circuit characterizing the first terminal A1 and the fourth terminal B2 of the pressure sensing cell 10. The test of the 2 nd pressure sensing unit 10 can be performed at the stage t2, the test of the 3 rd pressure sensing unit 10 can be performed at the stage t3, and the test of the 4 th pressure sensing unit 10 can be performed at the stage t 4. That is, the trigger signal output next from the trigger signal output terminal of the scanning unit 31 controls the n first switch units 11 and the n second switch units 12 to be sequentially turned on, and controls the n pressure sensing units 10 to be sequentially connected to the test signal TX on the first test terminal 21. When the 1 st to ith first switch units 11 are turned on one by one and the 1 st to ith second switch units 12 are turned on, the detection of the 1 st to ith pressure sensing units 10 can be realized one by one. Wherein SS1 and SS2 may represent waveforms on the second test terminal 22, the third test terminal 23, or the fourth test terminal 24; wherein, the waveform of SS1 can indicate that the 1 st to 4 th pressure sensing units 10 are normal, the waveform of SS2 can indicate that the 1 st pressure sensing unit 10 is short-circuited, the 2 nd pressure sensing unit 10 is normal, and the circuit in the 3 rd pressure sensing unit 10 has a high impedance state,

there is an open circuit condition in the circuit in the 4 th pressure sensing cell 10.

In other embodiment modes of the embodiment of the present invention, whether the pressure sensing unit 10 is abnormal or not may also be determined by detecting the resistance value. For example, it is assumed that the resistance values of the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4 are all R. The determination of the detection result can be made with reference to the following table,

wherein, the terminals 21-23 indicate that the resistance value between the first test terminal 21 and the third test terminal 23 is detected, if the resistance value between the two is 0, it indicates that the short circuit occurs in the circuit between the first test terminal 21 and the third test terminal 23, and if the short circuit does not occur in any of the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4, the first sensing resistor R1 is short-circuited; if the resistance value between the two is (2/3) R, the second sensing resistor R2, the third sensing resistor R3 or the fourth sensing resistor R4 is short-circuited. If the resistance value between the two is 3R, the first sensing resistor R1 is characterized to be open circuit. The terminals 21-24 represent the detection of the resistance value between the first test terminal 21 and the fourth test terminal 24. The terminals 21-22 represent the detection of the resistance value between the first test terminal 21 and the second test terminal 22.

It can be seen that the display panel provided by the embodiment of the invention can determine the abnormal reason of each pressure sensing unit.

Fig. 5 is a schematic structural diagram of another pressure sensing unit according to an embodiment of the present invention. Referring to fig. 5, the pressure sensing unit is quadrilateral, made of semiconductor material, and includes a first side and a second side which are oppositely arranged, and a third side and a fourth side which are oppositely arranged;

the first end a1, the second end a2, the third end B1 and the fourth end B2 of the pressure sensing unit are located at the first edge, the second edge, the third edge and the fourth edge, respectively.

Fig. 6 shows an equivalent circuit diagram of the pressure sensing unit, two adjacent connection terminals (the first terminal a1 and the third terminal B1, the first terminal a1 and the fourth terminal B2, the second terminal a2 and the third terminal B1, and the second terminal a2 and the fourth terminal B2) are connected through a semiconductor material film, equivalently, through one resistor, at this time, four resistors R are equivalently obtained between the four connection terminals, which is equivalent to a bridge shown in fig. 4, and a specific process for detecting the pressure sensing unit can refer to the description of the detection of the pressure sensing unit shown in fig. 4. Wherein, the shape of the pressure sensing unit can be square.

After the pressure touch anomaly detection, the electrical connection between the third end B1 of the pressure sensing unit 10 and the third test terminal 23 shown in fig. 1 is cut off, and the electrical connection between the fourth end B2 of the pressure sensing unit 10 and the fourth test terminal 24 is cut off, so as to obtain the display panel. For example, for the display panel shown in fig. 1, after the pressure touch anomaly detection is performed on the display panel, the electrically connected metal traces of each pressure sensing unit 10 and the third test terminal 23 and the electrically connected metal traces of each pressure sensing unit 10 and the fourth test terminal 24 may be cut by laser cutting. The third terminals B1 of the pressure-sensing cells 10 are insulated, and the fourth terminals B2 of the pressure-sensing cells 10 are insulated. So as to realize the detection of the pressure born on the display panel. Specifically, the display panel further includes a first input signal line, a second input signal line, and n first output signal lines and n second output signal lines; the third end and the fourth end of the ith pressure sensing unit are respectively and electrically connected with the ith first output signal line and the ith second output signal line; the first input signal line is electrically connected to the first test terminal, and the second input signal line is electrically connected to the second test terminal. The first end and the second end of the pressure sensing unit are respectively two input ends of the pressure sensing unit, and the third end and the fourth end of the pressure sensing unit are respectively two output ends of the pressure sensing unit. The first input signal line, the second input signal line, the n first output signal lines, and the n second output signal lines may be electrically connected to respective ports of a driving integrated circuit (driving IC), respectively. For example, in a normal display process, the driving IC outputs driving signals to the first input signal line and the second input signal line, when the 1 st first switch unit and the 1 st second switch unit are turned on, the driving signal on the first input signal line is transmitted to the first end of the 1 st pressure sensing unit through the turned-on 1 st first switch unit, the driving signal on the second input signal line is transmitted to the second end of the 1 st pressure sensing unit through the turned-on 1 st second switch unit, the 1 st pressure sensing unit outputs pressure detection signals at the third end and the fourth end according to the driving signals input by the first end and the second end, and the driving IC determines the magnitude of the touch pressure according to the pressure detection signals. When the 2 nd first switch unit and the 2 nd second switch unit are switched on, the driving signal on the first input signal line is transmitted to the first end of the 2 nd pressure sensing unit through the switched-on 2 nd first switch unit, the driving signal on the second input signal line is transmitted to the second end of the 2 nd pressure sensing unit through the switched-on 2 nd second switch unit, the 2 nd pressure sensing unit outputs pressure detection signals at the third end and the fourth end according to the driving signal input by the first end and the second end, and the driving IC determines the touch pressure according to the pressure detection signals. Therefore, the display panel sequentially passes through the pressure sensing units to realize touch pressure detection, and the pressure borne by the display panel is determined.

Fig. 7 is a structural diagram of another display panel according to an embodiment of the present invention, and referring to fig. 7, on the basis of the above embodiment, the display panel further includes n third switch units 13, n fourth switch units 14, and a fifth test terminal 25; the third terminal B1 of the pressure sensing unit 10 is electrically connected with the third test terminal 23 through the third switching unit 13; the fourth end B2 of the pressure sensing unit 10 is electrically connected with the fourth test terminal 24 through the fourth switching unit 14;

the third end B1 of the ith pressure sensing unit 10 is electrically connected to the first end of the ith third switching unit 13, and the fourth end B2 of the ith pressure sensing unit is electrically connected to the first end of the ith fourth switching unit 14; a second end of each third switching unit 13 is electrically connected to the third test terminal 23, and a second end of each fourth switching unit 14 is electrically connected to the fourth test terminal 24;

a control terminal of each third switching unit 13 and a control terminal of each fourth switching unit 14 are electrically connected to the fifth test terminal 25.

When each pressure sensing unit 10 is detected, a control signal may be input to the fifth test terminal 25 to control each of the third switching unit 13 and the fourth switching unit 14 to be turned on, and after the third switching unit 13 and the fourth switching unit 14 are turned on, the detection of the pressure sensing unit 10 is similar to that of the display panel shown in fig. 1. After the detection of the abnormal pressure touch on the display panel shown in fig. 7 is completed, the metal traces electrically connecting each pressure sensing unit 10 and the third test terminal 23 may not be cut off, and the metal traces electrically connecting each pressure sensing unit 10 and the fourth test terminal 24 may not be cut off. And outputting a control signal to the fifth test terminal 25 through a corresponding driving circuit, and controlling the third switching unit 13 and the fourth switching unit 14 to be turned off, so that each third terminal B1 of each pressure sensing unit 10 is insulated, and each fourth terminal B2 of each pressure sensing unit 10 is insulated. And then guarantee to realize the detection of touch-control pressure on the display panel. Because the metal wires electrically connected with the pressure sensing unit 10, the third testing terminal 23 and the fourth testing terminal 2 do not need to be cut by laser, the problem that the metal wires are short-circuited easily in the laser cutting process can be solved, and the working reliability of the display panel is ensured.

Of course, after the abnormal pressure touch detection is performed, the third terminal of the pressure sensing unit and the third switch unit are electrically disconnected, and the fourth terminal of the pressure sensing unit and the fourth switch unit are electrically disconnected, so as to obtain another display panel.

Fig. 8 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, and referring to fig. 8, on the basis of the above embodiment, the display panel further includes a sixth test terminal 26, n fifth switch units 15, and n sixth switch units 16; a first end of the ith fifth switch unit 15 is electrically connected with a first end of the ith pressure sensing unit 10, a second end of the ith fifth switch unit 15 is electrically connected with the first test terminal 21, and a control end of each fifth switch unit 15 is electrically connected with the sixth test terminal 26;

the second end of the ith sixth switching element 16 is electrically connected to the second end a2 of the ith pressure sensing element 10, the first end of the ith sixth switching element 16 is electrically connected to the second test terminal 22, and the control end of each sixth switching element 16 is electrically connected to the sixth test terminal 26. Through the sixth test terminal 26, in the normal working process of the display panel, the fifth switch unit 15 and the sixth switch unit 16 can be controlled to be turned on, so that the driving signal is loaded to the first end a1 and the second end a2 of the pressure sensing unit 10 through the fifth switch unit 15 and the sixth switch unit 16, and the pressure sensing unit 10 outputs a pressure detection signal to detect the touch pressure on the display panel. The normal operation process of the display panel means that after the display panel is assembled into a module, a driving circuit, such as a driving IC, provides driving signals to the first end a1 and the second end a2 of the pressure sensing unit 10, such as a power signal to the first end a1 of the pressure sensing unit 10 and a ground signal to the second end a 2; according to the received signals of the third terminal B1 and the fourth terminal B2 of each pressure sensing unit 10, the magnitude of the touch pressure is determined. In the normal working process of the display panel, the fifth switch unit 15 and the sixth switch unit 16 can also be controlled to be turned off, the trigger signal output by the next trigger signal output end of the scanning unit 31 controls the first switch unit 11 and the second switch unit 12 to be turned on, so that the pressure sensing units 10 can detect the touch pressure one by one, when one pressure sensing unit 10 works, the other pressure sensing units 10 do not input driving signals, do not work, and the power consumption can be reduced. The corresponding control mode can be selected according to the design requirement of the display panel.

Fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 9, the display panel further includes a seventh test terminal 27 and n seventh switching units 17;

the control end of each first switch unit 11 and the control end of the second switch unit 12 are electrically connected with the next triggering signal output end of the corresponding scanning unit 31 through a seventh switch unit 17;

a first end of the ith seventh switching unit 17 is electrically connected to the control end of the ith first switching unit 11 and the control end of the ith second switching unit 12, a second end of the ith seventh switching unit 17 is electrically connected to the trigger signal output end next of the scanning unit 31 corresponding to the ith first switching unit 11, and a control end of the ith seventh switching unit 17 is electrically connected to the seventh test terminal 27. Since the display panel is in normal operation, it may operate in two modes: 1. displaying and touch pressure detection work in a time-sharing mode; 2. the display and the touch pressure detection work simultaneously; in the 1 st mode of operation, the circuit of fig. 8 operates without any problem, but when in the 2 nd mode of operation, since the trigger signal output terminal next of the scanning unit 31 is electrically connected to the control terminal of the first switching unit 11 and the control terminal of the second switching unit 12, the trigger signal output from the trigger signal output terminal next of the scanning unit 31 sequentially turns on the first switching unit 11 and the second switching unit 12, for example, outputs a control signal to the sixth test terminal 26, controls the fifth switching unit 15 and the sixth switching unit 16 to be turned on, when the 1 st first switch unit and the 1 st second switch unit are turned on, and the other first switch units 11 and the other second switch units 12 are turned off, the impedance of the circuits at the first end a1 and the second end a2 of the 1 st pressure sensing unit 10 is inconsistent with the conditions of the other pressure sensing units 10, which may affect the accuracy of the touch pressure detection. Therefore, the seventh switching unit 17 and the seventh test terminal 27 are designed to control the seventh switching unit 17 to be turned on during the stage of detecting the touch pressure abnormality. During normal operation of the display panel and operating in the 2 nd mode, all the seventh switching units 17 can be controlled to be turned off by outputting a control signal to the seventh test terminal 27 through the driving circuit, so that the trigger signal output by the trigger signal output terminal next of the scanning unit 31 cannot be transmitted to the control terminals of the first switching unit 11 and the second switching unit 12, the first switching unit 11 and the second switching unit 12 are not turned on, and during the detection process, the resistances between the first terminal a1 and the second terminal a2 of each pressure sensing unit 10 tend to be consistent, thereby improving the accuracy and reliability of touch pressure detection.

Fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and referring to fig. 10, on the basis of the display panel shown in any of the above embodiments, in the display panel, the first switch unit 11 includes a first transistor M1, the second switch unit 12 includes a second transistor M2, the third switch unit 13 includes a third transistor M3, the fourth switch unit 14 includes a fourth transistor M4, the fifth switch unit 15 includes a fifth transistor M5, the sixth switch unit 16 includes a sixth transistor M6, and the seventh switch unit 17 includes a seventh transistor M7;

a first electrode, a second electrode and a gate of the first transistor M1 are electrically connected to the first terminal, the second terminal and the control terminal of the first switching unit 11, respectively; a first electrode, a second electrode and a gate of the second transistor M2 are electrically connected to the first terminal, the second terminal and the control terminal of the second switching unit 12, respectively; a first electrode, a second electrode, and a gate electrode of the third transistor M3 are electrically connected to a first terminal, a second terminal, and a control terminal of the third switching unit 13, respectively; a first electrode, a second electrode, and a gate of the fourth transistor M4 are electrically connected to the first terminal, the second terminal, and the control terminal of the fourth switching unit 14, respectively; a first electrode, a second electrode, and a gate of the fifth transistor M5 are electrically connected to the first terminal, the second terminal, and the control terminal of the fifth switching unit 15, respectively; a first electrode, a second electrode and a gate of the sixth transistor M6 are electrically connected to the first terminal, the second terminal and the control terminal of the sixth switching unit 16, respectively; a first pole, a second pole and a gate of the seventh transistor M7 are electrically connected to the first terminal, the second terminal and the control terminal of the seventh switching unit 17, respectively. The first to seventh transistors may be all N-type transistors or P-type transistors. For example, in the circuit shown in fig. 10, the first to seventh transistors are all N-type transistors, and referring to fig. 2, in the stage of detecting the touch pressure abnormality, the signal pad25 on the fifth test terminal 25, the signal pad26 on the sixth test terminal 26, and the test signal pad27 on the seventh test terminal 27 are all at high level, and the third to seventh transistors are all turned on.

It should be noted that, in the display panel provided in the embodiment of the present invention, two adjacent pressure sensing units may be electrically connected to different scanning units through the first switch unit and the second switch unit, and the two different scanning units may be adjacent or not adjacent. Fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention. The control end of the 1 st first switch unit 11 and the control end of the 1 st second switch unit 12 are electrically connected to the trigger signal output end out of the first scan unit 31; the control terminal of the 2 nd first switching unit 11 and the control terminal of the 2 nd second switching unit 12 are electrically connected to the trigger signal output terminal out of the third scan cell 31, and the output terminal out of the scan cell serves as its trigger signal output terminal next.

An embodiment of the present invention further provides a display device, referring to fig. 12, and fig. 12 is a schematic structural diagram of the display device provided in the embodiment of the present invention. Referring to fig. 12, the display device 110 includes the display panel 100 provided in any embodiment of the present invention. The display device 110 may be any electronic device with a display function, such as a touch display screen, a mobile phone, a tablet computer, a notebook computer, or a television.

The embodiment of the invention also provides a detection method of the display panel, and the detection method can be used for detecting the display panel provided by any embodiment of the invention. Exemplarily, taking the display panel shown in fig. 1 as an example, referring to fig. 13, the method for detecting a display panel provided by the embodiment of the present invention includes:

s101, in a pressure touch control abnormity detection stage, inputting a test signal to a first test terminal, and respectively receiving a signal of a second test terminal, a signal of a third test terminal and a signal of a fourth test terminal when an ith first switch unit and an ith second switch unit are conducted;

for example, a test probe of the test device contacts a first test terminal, and the test device inputs a test signal to the first terminal; meanwhile, the scanning unit is provided with a corresponding control signal, and the scanning unit trigger signal output end outputs a trigger signal to the first switch unit and the second switch unit.

S102, determining the abnormal condition of the ith pressure sensing unit according to at least one of the signal of the second test terminal, the signal of the third test terminal and the signal of the fourth test terminal;

referring to fig. 1 and 2, at a stage t1, the trigger signal output end of the scan unit 31 outputs a trigger signal to the 1 st first switch unit 11 and the 1 st second switch unit 12, the 1 st first switch unit 11 and the 1 st second switch unit 12 are turned on, the test signal TX on the first test terminal 21 is transmitted to the first end of the pressure sensing unit 10 through the turned-on 1 st first switch unit 11, and whether the pressure sensing unit 10 is abnormal is determined by sequentially detecting a signal of the second test terminal 22, a signal of the third test terminal 23, and a signal of the fourth test terminal 24. Specifically, if the amplitude of the signal of the second test terminal 22 is detected to be greater than the first threshold, for example, when the amplitude of the test signal is V, the first threshold may be 0.95V, which indicates that a short circuit may occur between the second test terminal 22 and the first test terminal 21, i.e., a short circuit occurs in the circuit between the first end a1 and the second end a2 of the pressure sensing unit 10; if the amplitude of the signal of the second test terminal 22 is detected to be greater than or equal to the second threshold value and less than or equal to the first threshold value, for example, the second threshold value may be 0.5V, the circuits of the first end a1 and the second end a2 of the pressure sensing unit 10 are normal; if the amplitude of the signal of the second test terminal 22 is detected to be greater than zero and smaller than the second threshold, it indicates that the circuit between the first end a1 and the second end a2 of the pressure sensing unit 10 is in a high impedance state; if the amplitude of the signal of the second test terminal 22 is detected to be zero, it is characterized that there is an open circuit in the electrical circuit between the first end A1 and the second end A2 of the pressure sensing cell 10. When detecting the signal of the third test terminal 23, if the amplitude of the signal of the third test terminal 23 is detected to be greater than the first threshold, it is characterized that the short circuit occurs in the circuit between the third test terminal 23 and the first test terminal 21, that is, the short circuit occurs in the circuit between the third terminal B1 and the first terminal a1 of the pressure sensing unit 10;

fig. 14 is another detection method for a display panel according to an embodiment of the present invention, and referring to fig. 14, the detection method includes:

s201, in a pressure touch control abnormity detection stage, inputting a test signal to a second test terminal, and respectively receiving a signal of the first test terminal, a signal of a third test terminal and a signal of a fourth test terminal when an ith first switch unit and an ith second switch unit are conducted.

S202, determining the abnormal condition of the ith pressure sensing unit according to at least one of the signal of the first test terminal, the signal of the third test terminal and the signal of the fourth test terminal.

Furthermore, the display panel provided by the embodiment of the invention further includes n third switch units, n fourth switch units, and a fifth test terminal; the third end of the pressure sensing unit is electrically connected with the third test terminal through the third switch unit; the fourth end of the pressure sensing unit is electrically connected with the fourth test terminal through a fourth switch unit; the third end of the ith pressure sensing unit is electrically connected with the first end of the ith third switching unit, and the fourth end of the ith pressure sensing unit is electrically connected with the first end of the ith fourth switching unit; the second end of each third switch unit is electrically connected with the third test terminal, and the second end of each fourth switch unit is electrically connected with the fourth test terminal; the control end of each third switch unit and the control end of each fourth switch unit are electrically connected with the fifth test terminal;

in the pressure touch control abnormity detection stage, a first control signal is input to a fifth test terminal, and a third switching unit and a fourth switching unit are conducted; specifically, the first control signal may be input to the fifth test terminal through the test equipment, and the first control signal may be a high level signal or a low level signal.

Inputting a test signal to the first test terminal, and if the amplitudes of the signal of the second test terminal, the signal of the third test terminal and the signal of the fourth test terminal are greater than a first threshold value and smaller than the amplitude of the test signal, enabling the ith pressure sensing unit to be normal; if the amplitude of the signal of the second test terminal, the signal of the third test terminal or the signal of the fourth test terminal is equal to the amplitude of the test signal, the ith pressure sensing unit is short-circuited; if the amplitude of the signal of the second test terminal, the signal of the third test terminal or the signal of the fourth test terminal is equal to zero, the ith pressure sensing unit is disconnected; if the amplitude of the signal of the second test terminal, the signal of the third test terminal or the signal of the fourth test terminal is larger than zero and smaller than a second threshold value, the ith pressure sensing unit is in a high-resistance state;

inputting a test signal to the second test terminal, and if the amplitudes of the signal of the first test terminal, the signal of the third test terminal and the signal of the fourth test terminal are greater than or equal to a first threshold value and less than or equal to a second threshold value, enabling the ith pressure sensing unit to be normal; if the amplitude of the signal of the first test terminal, the signal of the third test terminal or the signal of the fourth test terminal is greater than the second threshold value and less than or equal to the amplitude of the test signal, the ith pressure sensing unit is short-circuited; if the amplitude of the signal of the first test terminal, the amplitude of the signal of the third test terminal or the amplitude of the signal of the fourth test terminal is equal to zero, the ith pressure sensing unit is disconnected; and if the amplitude of the signal of the first test terminal, the signal of the third test terminal or the signal of the fourth test terminal is greater than zero and smaller than the first threshold value, the ith pressure sensing unit is in a high-resistance state. The test process is completed by test equipment.

Further, the display panel provided by the embodiment of the present invention further includes a sixth test terminal, n fifth switch units, and n sixth switch units; the first end of the ith fifth switch unit is electrically connected with the first end of the ith pressure sensing unit, the second end of the ith fifth switch unit is electrically connected with the first test terminal, and the control end of each fifth switch unit is electrically connected with the sixth test terminal; the second end of the ith sixth switch unit is electrically connected with the second end of the ith pressure sensing unit, the first end of the ith sixth switch unit is electrically connected with the second test terminal, and the control end of each sixth switch unit is electrically connected with the sixth test terminal;

correspondingly, the detection method of the display panel provided by the embodiment of the invention further comprises the following steps:

and in the pressure touch control abnormity detection stage, inputting a second control signal to the sixth test terminal to control the fifth switch unit and the sixth switch unit to be switched off.

Further, the display panel provided by the embodiment of the invention further comprises a seventh test terminal and n seventh switch units; the control end of each first switch unit and the control end of each second switch unit are electrically connected with the trigger signal output end of the corresponding scanning unit through a seventh switch unit; the first end of the ith seventh switch unit is electrically connected with the control end of the ith first switch unit and the control end of the ith second switch unit, the second end of the ith seventh switch unit is electrically connected with the trigger signal output end of the scanning unit corresponding to the ith first switch unit, and the control end of the ith seventh switch unit is electrically connected with the seventh test terminal;

the detection method further comprises the following steps:

and in the pressure touch control abnormity detection stage, a first control signal is input to the seventh test terminal, and the seventh switch unit is conducted.

After the display panel is detected, the display panel forms a module, in a normal display stage, a second control signal is input to the fifth test terminal and the seventh test terminal, and the third switch unit, the fourth switch unit and the seventh switch unit are turned off; and inputting a first control signal to the sixth test terminal to control the fifth switching unit and the sixth switching unit to be conducted. For example, in a normal display stage, a driving IC on the display panel inputs a second control signal to the fifth test terminal and the seventh test terminal to control the third switching unit, the fourth switching unit and the seventh switching unit to turn off; and a driving IC on the display panel inputs a first control signal to the sixth test terminal to control the fifth switch unit and the sixth switch unit to be conducted.

The embodiment of the present invention further provides another detection method for a display panel, which can be used for the display panel provided in any embodiment of the present invention, and referring to fig. 15, the detection method includes:

s301, in the pressure touch control abnormity detection stage, when the ith first switch unit and the ith second switch unit are conducted, at least one of the resistance between the first test terminal and the second test terminal, the resistance between the first test terminal and the third test terminal and the resistance between the second test terminal and the third test terminal is detected;

s302, determining the abnormal condition of the ith pressure sensing unit according to at least one of the resistance between the first test terminal and the second test terminal, the resistance between the first test terminal and the third test terminal and the resistance between the second test terminal and the third test terminal.

Further, the display panel provided by the embodiment of the present invention further includes: n third switching units, n fourth switching units, and a fifth test terminal; the third end of the pressure sensing unit is electrically connected with the third test terminal through the third switch unit; the fourth end of the pressure sensing unit is electrically connected with the fourth test terminal through a fourth switch unit;

the third end of the ith pressure sensing unit is electrically connected with the first end of the ith third switching unit, and the fourth end of the ith pressure sensing unit is electrically connected with the first end of the ith fourth switching unit; the second end of each third switch unit is electrically connected with the third test terminal, and the second end of each fourth switch unit is electrically connected with the fourth test terminal;

the control end of each third switch unit and the control end of each fourth switch unit are electrically connected with the fifth test terminal;

a sixth test terminal, n fifth switching units, and n sixth switching units;

the first end of the ith fifth switch unit is electrically connected with the first end of the ith pressure sensing unit, the second end of the ith fifth switch unit is electrically connected with the first test terminal, and the control end of each fifth switch unit is electrically connected with the sixth test terminal;

the second end of the ith sixth switch unit is electrically connected with the second end of the ith pressure sensing unit, the first end of the ith sixth switch unit is electrically connected with the second test terminal, and the control end of each sixth switch unit is electrically connected with the sixth test terminal;

the detection method further comprises the following steps:

Further, the display panel provided by the embodiment of the invention further comprises a seventh test terminal and n seventh switch units;

the control end of each first switch unit and the control end of each second switch unit are electrically connected with the trigger signal output end of the corresponding scanning unit through a seventh switch unit;

the first end of the ith seventh switch unit is electrically connected with the control end of the ith first switch unit and the control end of the ith second switch unit, the second end of the ith seventh switch unit is electrically connected with the trigger signal output end of the scanning unit corresponding to the ith first switch unit, and the control end of the ith seventh switch unit is electrically connected with the seventh test terminal;

the detection method further comprises the following steps:

in the pressure touch control abnormity detection stage, a first control signal is input to a seventh test terminal, and a seventh switch unit is conducted; for example, there is a test device that inputs the first control signal to the seventh test terminal.

In a normal display stage, inputting a second control signal to the fifth test terminal and the seventh test terminal, and turning off the third switching unit, the fourth switching unit and the seventh switching unit; and inputting a first control signal to the sixth test terminal to control the fifth switching unit and the sixth switching unit to be conducted. For example, if the driving IC on the display panel inputs a second control signal to the fifth test terminal and the seventh test terminal, the third switching unit, the fourth switching unit and the seventh switching unit are controlled to be turned off; and inputting a first control signal to the sixth test terminal to control the fifth switching unit and the sixth switching unit to be conducted.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, comprising:

the pressure sensing device comprises n pressure sensing units, n first switch units and n second switch units, wherein n is an integer greater than 1;

the scanning unit comprises a trigger signal output end and is used for outputting a trigger signal to a next-stage scanning unit so as to control the next-stage scanning unit to output the scanning signal;

the control end of the ith first switch unit and the control end of the ith second switch unit are electrically connected with the trigger signal output end of the scanning unit at the same stage, and different first switch units are electrically connected with the trigger signal output ends of the scanning units at different stages; wherein i is more than or equal to 1 and less than or equal to n;

at least one of the signal of the third test terminal and the signal of the fourth test terminal determines an abnormal condition of the pressure sensing unit; or at least one of a resistance between the first test terminal and the second test terminal, a resistance between the first test terminal and the third test terminal, a resistance between the first test terminal and the fourth test terminal, and a resistance between the second test terminal and the third test terminal determines an abnormal condition of the pressure sensing unit.

2. The display panel according to claim 1, further comprising n third switching units, n fourth switching units, and a fifth test terminal; the third end of the pressure sensing unit is electrically connected with the third test terminal through the third switch unit; a fourth end of the pressure sensing unit is electrically connected with the fourth test terminal through the fourth switching unit;

the third end of the ith pressure sensing unit is electrically connected with the first end of the ith third switching unit, and the fourth end of the ith pressure sensing unit is electrically connected with the first end of the ith fourth switching unit; a second end of each of the third switching units is electrically connected to the third test terminal, and a second end of each of the fourth switching units is electrically connected to the fourth test terminal;

a control terminal of each of the third switching units and a control terminal of each of the fourth switching units are electrically connected to the fifth test terminal.

3. The display panel according to claim 2, wherein after the pressure touch anomaly detection, an electrical connection between the third terminal of the pressure sensing unit and the third switching unit is cut off, and an electrical connection between the fourth terminal of the pressure sensing unit and the fourth switching unit is cut off.

4. The display panel according to claim 2, further comprising a sixth test terminal, n fifth switching units, and n sixth switching units;

a first end of the ith fifth switch unit is electrically connected with a first end of the ith pressure sensing unit, a second end of the ith fifth switch unit is electrically connected with the first test terminal, and a control end of each fifth switch unit is electrically connected with the sixth test terminal;

the second end of the ith sixth switch unit is electrically connected with the second end of the ith pressure sensing unit, the first end of the ith sixth switch unit is electrically connected with the second test terminal, and the control end of each sixth switch unit is electrically connected with the sixth test terminal.

5. The display panel according to claim 4, wherein the first terminal and the second terminal of the pressure sensing unit are two input terminals of the pressure sensing unit, respectively, and the third terminal and the fourth terminal of the pressure sensing unit are two output terminals of the pressure sensing unit, respectively;

the display panel further comprises a first input signal line, a second input signal line, n first output signal lines and n second output signal lines; a third end and a fourth end of the ith pressure sensing unit are electrically connected with the ith first output signal line and the ith second output signal line respectively; the first input signal line is electrically connected to the first test terminal, and the second input signal line is electrically connected to the second test terminal.

6. The display panel according to claim 4, further comprising a seventh test terminal and n seventh switching units;

the control end of each first switch unit and the control end of each second switch unit are electrically connected with the corresponding trigger signal output end of the scanning unit through one seventh switch unit;

the first end of the ith seventh switch unit is electrically connected with the control end of the ith first switch unit and the control end of the ith second switch unit, the second end of the ith seventh switch unit is electrically connected with the trigger signal output end of the scanning unit corresponding to the ith first switch unit, and the control end of the ith seventh switch unit is electrically connected with the seventh test terminal.

7. The display panel according to claim 6, wherein the first switch unit comprises a first transistor, the second switch unit comprises a second transistor, the third switch unit comprises a third transistor, the fourth switch unit comprises a fourth transistor, the fifth switch unit comprises a fifth transistor, the sixth switch unit comprises a sixth transistor, and the seventh switch unit comprises a seventh transistor;

a first electrode, a second electrode and a grid electrode of the first transistor are respectively and electrically connected with a first end, a second end and a control end of the first switch unit;

a first electrode, a second electrode and a grid electrode of the second transistor are respectively and electrically connected with a first end, a second end and a control end of the second switch unit;

a first electrode, a second electrode and a grid electrode of the third transistor are respectively and electrically connected with a first end, a second end and a control end of the third switching unit;

a first electrode, a second electrode and a grid electrode of the fourth transistor are respectively and electrically connected with a first end, a second end and a control end of the fourth switching unit;

a first electrode, a second electrode and a grid electrode of the fifth transistor are respectively and electrically connected with a first end, a second end and a control end of the fifth switch unit;

a first electrode, a second electrode and a grid electrode of the sixth transistor are respectively and electrically connected with a first end, a second end and a control end of the sixth switching unit;

and a first electrode, a second electrode and a grid electrode of the seventh transistor are respectively and electrically connected with a first end, a second end and a control end of the seventh switching unit.

8. The display panel according to any one of claims 1 to 7, wherein the pressure sensing unit includes a first sensing resistor, a second sensing resistor, a third sensing resistor, and a fourth sensing resistor;

the first end of the first sensing resistor and the first end of the third sensing resistor are electrically connected with the first end of the pressure sensing unit, the second end of the first sensing resistor and the first end of the second sensing resistor are electrically connected with the third end of the pressure sensing unit, the second end of the second sensing resistor and the second end of the fourth sensing resistor are electrically connected with the second end of the pressure sensing unit, and the second end of the third sensing resistor and the first end of the fourth sensing resistor are electrically connected with the fourth end of the pressure sensing unit.

9. The display panel according to any one of claims 1 to 7, wherein the pressure sensing unit has a quadrilateral shape, is made of a semiconductor material, and comprises a first side and a second side which are oppositely arranged, and a third side and a fourth side which are oppositely arranged;

the first end, the second end, the third end and the fourth end of the pressure sensing unit are respectively positioned on the first edge, the second edge, the third edge and the fourth edge.

10. The display panel according to claim 1, wherein after the pressure touch anomaly detection, an electrical connection between a third end of the pressure sensing unit and the third test terminal is cut off, and an electrical connection between a fourth end of the pressure sensing unit and the fourth test terminal is cut off.

11. A display device characterized by comprising the display panel according to any one of claims 1 to 10.

12. A method for inspecting a display panel, used for the display panel according to claim 1,

in the stage of detecting the pressure touch anomaly,

inputting a test signal to the first test terminal, respectively receiving a signal of the second test terminal, a signal of the third test terminal and a signal of the fourth test terminal when the ith first switch unit and the ith second switch unit are turned on, and determining an abnormal condition of the ith pressure sensing unit according to at least one of the signal of the second test terminal, the signal of the third test terminal and the signal of the fourth test terminal;

13. The detection method according to claim 12, further comprising n third switching units, n fourth switching units, and a fifth test terminal; the third end of the pressure sensing unit is electrically connected with the third test terminal through the third switch unit; a fourth end of the pressure sensing unit is electrically connected with the fourth test terminal through the fourth switching unit;

a control terminal of each of the third switching units and a control terminal of each of the fourth switching units are electrically connected to the fifth test terminal;

in a pressure touch control abnormity detection stage, inputting a first control signal to the fifth test terminal, and enabling the third switching unit and the fourth switching unit to be conducted;

inputting a test signal to the first test terminal, wherein if the amplitudes of the signal of the second test terminal, the signal of the third test terminal and the signal of the fourth test terminal are greater than a first threshold and smaller than the amplitude of the test signal, the ith pressure sensing unit is normal; if the amplitude of the signal of the second test terminal, the signal of the third test terminal or the signal of the fourth test terminal is equal to the amplitude of the test signal, the ith pressure sensing unit is short-circuited; if the amplitude of the signal of the second test terminal, the signal of the third test terminal or the signal of the fourth test terminal is equal to zero, the ith pressure sensing unit is disconnected; if the amplitude of the signal of the second test terminal, the signal of the third test terminal or the signal of the fourth test terminal is larger than zero and smaller than a second threshold value, the ith pressure sensing unit is in a high-impedance state;

inputting a test signal to the second test terminal, and if the amplitudes of the signal of the first test terminal, the signal of the third test terminal and the signal of the fourth test terminal are greater than or equal to a first threshold value and less than or equal to a second threshold value, the ith pressure sensing unit is normal; if the amplitude of the signal of the first test terminal, the signal of the third test terminal or the signal of the fourth test terminal is larger than the second threshold value and is smaller than or equal to the amplitude of the test signal, the ith pressure sensing unit is short-circuited; if the amplitude of the signal of the first test terminal, the signal of the third test terminal or the signal of the fourth test terminal is equal to zero, the ith pressure sensing unit is disconnected; and if the amplitude of the signal of the first test terminal, the signal of the third test terminal or the signal of the fourth test terminal is larger than zero and smaller than the first threshold value, the ith pressure sensing unit is in a high-impedance state.

14. The detection method according to claim 13, wherein the display panel further includes a sixth test terminal, n fifth switch units, and n sixth switch units;

a second end of the ith sixth switch unit is electrically connected with a second end of the ith pressure sensing unit, a first end of the ith sixth switch unit is electrically connected with the second test terminal, and a control end of each sixth switch unit is electrically connected with the sixth test terminal;

the detection method further comprises the following steps:

15. The detection method according to claim 14, wherein the display panel further comprises a seventh test terminal and n seventh switch units;

the control end of each first switch unit and the control end of each second switch unit are electrically connected with the trigger signal output end of the corresponding scanning unit through one seventh switch unit;

the detection method further comprises the following steps:

16. The detection method according to claim 15, wherein in a normal display phase, a second control signal is input to the fifth test terminal and the seventh test terminal, and the third switching unit, the fourth switching unit, and the seventh switching unit are turned off; and inputting a first control signal to the sixth test terminal to control the fifth switching unit and the sixth switching unit to be conducted.

17. A method for inspecting a display panel, used for the display panel according to claim 1,

in the stage of detecting abnormal pressure touch control

When the ith first switch unit and the ith second switch unit are conducted, at least one of the resistance between a first test terminal and a second test terminal, the resistance between the first test terminal and a third test terminal and the resistance between the second test terminal and the third test terminal is detected, and the abnormal condition of the ith pressure sensing unit is determined.

18. The detection method according to claim 17, wherein the display panel further comprises: n third switching units, n fourth switching units, and a fifth test terminal; the third end of the pressure sensing unit is electrically connected with the third test terminal through the third switch unit; a fourth end of the pressure sensing unit is electrically connected with the fourth test terminal through the fourth switching unit;

a sixth test terminal, n fifth switching units, and n sixth switching units;

the detection method further comprises the following steps:

19. The detection method according to claim 18, wherein the display panel further comprises a seventh test terminal and n seventh switch units;

the detection method further comprises the following steps:

in the pressure touch control abnormity detection stage, inputting a first control signal to the seventh test terminal, and conducting the seventh switch unit;

in a normal display stage, inputting a second control signal to the fifth test terminal and the seventh test terminal, and the third switching unit, the fourth switching unit and the seventh switching unit are turned off; and inputting a first control signal to the sixth test terminal to control the fifth switching unit and the sixth switching unit to be conducted.