CN107784969B

CN107784969B - Display panel, display device and pressure sensor detection method

Info

Publication number: CN107784969B
Application number: CN201711130992.XA
Authority: CN
Inventors: 陈晓梦; 杨康鹏; 许育民
Original assignee: Wuhan Tianma Microelectronics Co Ltd
Current assignee: Wuhan Tianma Microelectronics Co Ltd
Priority date: 2017-11-15
Filing date: 2017-11-15
Publication date: 2021-06-11
Anticipated expiration: 2037-11-15
Also published as: CN107784969A

Abstract

The embodiment of the invention discloses a display panel, a display device and a pressure sensor detection method. The display panel comprises a detection circuit, wherein the detection circuit comprises a control end, a signal input end and a signal output end; the signal input end of the detection circuit is electrically connected with the trigger signal output end of the Mth-stage shift register; the signal output end of the detection circuit is electrically connected with the trigger signal input end of the (M +1) th-stage shift register; the first induction signal measuring end or the second induction signal measuring end is electrically connected with the control end of the detection circuit; the detection circuit is used for forming a detection path and judging whether the pressure sensor is damaged or not by detecting whether the shift register of the (M +1) th stage can output a scanning signal when a bias voltage signal is input to the pressure sensor. The display panel provided by the embodiment of the invention realizes the purposes of detecting whether the pressure sensor is abnormal or not before the module stage and reducing the manufacturing cost of the display panel.

Description

Display panel, display device and pressure sensor detection method

Technical Field

The present invention relates to touch technologies, and in particular, to a display panel, a display device, and a pressure sensor detection method.

Background

At present, display panels are widely used in electronic devices such as mobile phones, tablet computers, intelligent wearable devices, and information query machines in public halls. Therefore, the user can operate the electronic equipment by touching the mark on the electronic equipment with fingers, dependence of the user on other input equipment (such as a keyboard, a mouse and the like) is eliminated, and man-machine interaction is simpler.

In order to ensure that the touch pressure detection function of the display panel can be normally used, whether the pressure sensor is damaged or not needs to be detected. However, at present, whether the pressure sensor is damaged or not can be detected only by depending on the driving chip and/or the flexible circuit board, so that the detection for judging whether the pressure sensor is damaged or not can be realized only in a module section. However, at this stage, since the process of aligning and attaching the display panel and the backlight module and crimping the driving chip and/or the flexible circuit board to the display panel is completed, if it is detected that the pressure sensor is damaged, waste of raw materials such as the backlight module, the driving chip and/or the flexible circuit board may be caused, that is, the manufacturing cost of the display panel may be increased due to such arrangement.

Disclosure of Invention

The invention provides a display panel, a display device and a pressure sensor detection method, which aim to detect whether a pressure sensor is damaged or not before a module stage and reduce the manufacturing cost of the display panel.

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

a substrate base plate;

at least one pressure sensor formed on the substrate base plate, the pressure sensor including a first sensing signal measuring terminal and a second sensing signal measuring terminal for outputting a pressure sensing detection signal from the pressure sensor, respectively;

the shift register comprises a trigger signal output end and a trigger signal input end, wherein the trigger signal output end provides a trigger signal for the trigger signal input end of the shift register of the next stage, and the trigger signal input end receives the trigger signal output by the trigger signal output end of the shift register of the previous stage;

and at least one detection circuit; the detection circuit comprises a control end, a signal input end and a signal output end; the signal input end of the detection circuit is electrically connected with the trigger signal output end of the Mth-stage shift register; the signal output end of the detection circuit is electrically connected with the trigger signal input end of the shift register of the (M +1) th stage; the first induction signal measuring end or the second induction signal measuring end is electrically connected with the control end of the detection circuit; the detection circuit is used for forming a detection path and judging whether the pressure sensor is damaged or not by detecting whether the shift register of the (M +1) th stage can output a scanning signal or not when a bias voltage signal is input to the pressure sensor;

wherein N, M are positive integers, and M is more than or equal to 1 and less than or equal to M +1 and less than or equal to N.

In a second aspect, an embodiment of the present invention further provides a display device, where the display device includes any one of the display panels provided in the embodiments of the present invention.

In a third aspect, an embodiment of the present invention further provides a method for detecting a pressure sensor of a display panel; the display panel includes:

a substrate base plate;

wherein N, M are positive integers, and M is more than or equal to 1 and less than or equal to M +1 and less than or equal to N;

the pressure sensor detection method of the display panel comprises the following steps:

in the detection stage of the pressure sensor, controlling the detection circuit to form a detection path and inputting a bias voltage signal to the pressure sensor;

detecting whether the shift register of the (M +1) th stage can output a scanning signal or not;

if the shift register of the (M +1) th stage can output a scanning signal, judging that the pressure sensor can carry out touch pressure detection; otherwise, the pressure sensor is judged to be damaged.

In the embodiment of the invention, the detection circuit is additionally arranged, the signal input end of the detection circuit is electrically connected with the trigger signal output end of the M-th-stage shift register, the signal output end of the detection circuit is electrically connected with the trigger signal input end of the M + 1-th-stage shift register, the control end of the detection circuit is electrically connected with the first sensing signal measuring end or the second sensing signal measuring end of the pressure sensor, so that when the detection circuit forms a detection path and a bias voltage signal is input to the pressure sensor, whether the pressure sensor is damaged or not is judged by detecting whether the M + 1-th-stage shift register can output a scanning signal, the problem that the detection for judging whether the pressure sensor is damaged or not can only be realized in a module section at present, the waste of raw materials such as a backlight module, a driving chip and/or a flexible circuit board is caused, the manufacturing cost of a display panel is increased is solved, and, whether the pressure sensor is abnormal or not is detected, and the manufacturing cost of the display panel is reduced.

Drawings

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

FIG. 2 is an enlarged view of a portion of the dotted frame of FIG. 1;

FIG. 3 is a timing diagram of a shift register trigger signal according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

FIG. 5 is an enlarged partial view of the dotted frame of FIG. 4;

FIG. 6 is a schematic structural diagram of a test circuit according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a test circuit according to another embodiment of the present invention;

fig. 8 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention;

FIG. 9 is an equivalent circuit diagram of the pressure sensor of FIG. 8;

FIG. 10 is a schematic structural diagram of another pressure sensor provided in accordance with 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 structural diagram of a display device according to an embodiment of the present invention;

fig. 13 is a flowchart illustrating a method for detecting a pressure sensor of a display panel according to an embodiment of the present invention;

fig. 14 is a flowchart of another method for detecting a pressure sensor of a display panel 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.

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and fig. 2 is a partially enlarged view of a dotted-line frame 101 in fig. 1. Referring to fig. 1 and 2, the display panel includes: a base substrate 100; at least one pressure sensor 110 formed on the substrate base plate 100, the pressure sensor 110 including a first sensing signal measuring terminal 111 and a second sensing signal measuring terminal 112 for outputting a pressure sensing detection signal from the pressure sensor 110, respectively; n cascaded shift registers 120 formed on a substrate for outputting a scan signal, the shift registers 120 including a trigger signal output terminal 121 and a trigger signal input terminal 122, wherein the trigger signal output terminal 121 provides a trigger signal to the trigger signal input terminal 122 of the next stage shift register 120, and the trigger signal input terminal 121 receives the trigger signal output from the trigger signal output terminal 121 of the previous stage shift register 120; and at least one detection circuit 130, the detection circuit 130 comprising a control terminal 131, a signal input terminal 132 and a signal output terminal 133; the signal input end 132 of the detection circuit 130 is electrically connected with the trigger signal output end 121/M of the Mth-stage shift register 120/M; the signal output end 133 of the detection circuit 130 is electrically connected with the trigger signal input end 122/M +1 of the M +1 th stage shift register 120/M + 1; the first sensing signal measuring end 111 or the second sensing signal measuring end 112 of the pressure sensor 110 is electrically connected with the control end 131 of the detection circuit 130; the detection circuit 130 is used for forming a detection path, and when a bias voltage signal is input to the pressure sensor 110, whether the pressure sensor 110 is damaged or not is judged by detecting whether the shift register of the (M +1) th stage can output a scanning signal; wherein N, M are positive integers, and M is more than or equal to 1 and less than or equal to M +1 and less than or equal to N.

The pressure sensor 110 is used for detecting a pressure signal applied to the display panel by a user, and converting the pressure signal into an electrical signal according to a certain rule, so as to trigger a certain function of the display panel, such as opening an audio player, opening a document, and the like.

The substrate 100 further includes a plurality of scan lines (not shown in fig. 1) and a plurality of data lines (not shown in fig. 1). The scan lines and the data lines intersect to define a plurality of pixel cells (not shown in fig. 1). The shift register 120 is electrically connected to its corresponding scan line. Because each shift register is cascaded, except for the first stage shift register, after receiving a trigger signal output by the previous stage shift register, any shift register outputs a scanning signal to a corresponding scanning line under the trigger of the trigger signal, so that pixel units electrically connected with the scanning line are charged, and image display is performed.

The pressure sensor detection means detecting whether the pressure sensor is damaged. When the pressure sensor is damaged, the pressure sensor loses the touch pressure detection function; when the pressure sensor is normal (i.e. the pressure sensor is not damaged), the pressure sensor can perform touch pressure detection.

"forming a detection path" means that the detection circuit is adjusted to a circuit mode for detection by the pressure sensor. That is, the control signal input terminal 132 and the signal output terminal 133 are electrically connected or disconnected depending only on the magnitude of the output signal of the control terminal 131 of the detection circuit 130.

Fig. 3 is a timing diagram of a shift register trigger signal according to an embodiment of the present invention. Referring to fig. 3, STV is a trigger signal received by the first stage shift register 120; CKV1 and CKV2 represent clock signals received by each shift register 120; Next/M-1 is the trigger signal output by the shift register 120/M-1, next/M is the trigger signal output by the shift register 120/M, next/M +1 is the trigger signal output by the shift register 120/M +1, gout/M-1 is the scan signal output by the shift register 120/M-1, gout/M is the scan signal output by the shift register 120/M, and gout/M +1 is the scan signal output by the shift register 120/M + 1. In fig. 3, when the pressure sensor is normal, the output signals of next/M +1 and 120/M +1 are shown by broken lines, and when the pressure sensor 110 is abnormal (i.e., the pressure sensor 110 is broken), the output signals of next/M +1 and 120/M +1 are shown by solid lines.

With continued reference to fig. 1, 2 and 3, when the detection circuit forms a detection path and inputs a bias voltage signal to the pressure sensor, if the pressure sensor 110 is normal, the first sensing signal measurement end or the second sensing signal measurement end of the pressure sensor both outputs an electrical signal, so as to control the electrical conduction between the trigger signal output end 121/M of the mth shift register 120/M and the trigger signal input end 122/M +1 of the M +1 shift register 120/M +1, so that the trigger signal output by the mth shift register 120/M can be transmitted to the trigger signal input end 122/M +1 of the M +1 shift register 120/M +1 through the detection circuit 130, and further the trigger signal a can be formed by triggering the M +1 shift register 120/M +1, and outputs a scanning signal b to the corresponding scanning line, and further charges the pixel unit electrically connected with the scanning line and displays an image. If the pressure sensor 110 is abnormal (i.e. the pressure sensor 110 is damaged), at least one of the first sensing signal measuring terminal and the second sensing signal measuring terminal of the pressure sensor does not output an electrical signal, if the first sensing signal measuring terminal does not output an electrical signal, the connection between the trigger signal output terminal 121/M of the mth shift register 120/M and the trigger signal input terminal 122/M +1 of the M +1 shift register 120/M +1 is disconnected, the trigger signal output from the trigger signal output terminal 121/M of the mth shift register 120/M is cut off by the detection circuit 130, i.e. the trigger signal cannot be transmitted to the trigger signal input terminal 122/M +1 of the M +1 shift register 120/M +1 through the detection circuit 130, and the M +1 shift register 120/M +1 cannot be triggered to form a trigger signal, and outputs the scan signal to the corresponding scan line, so that each pixel unit connected to the same scan line as the M +1 th stage shift register 120/M +1 cannot be normally charged and the image can be displayed. In fact, the pixel units corresponding to the M +1 th stage shift register 120/M +1 to the nth stage shift register cannot be charged and displayed normally.

The essence of the arrangement is that the detection result of the pressure sensor is related to the image display result, and a tester can judge whether the pressure sensor is damaged or not by detecting the change condition of the signal on each scanning line, and can judge whether the pressure sensor is damaged or not by observing the display condition of the display panel.

The embodiment of the invention solves the problem that the detection aiming at judging whether the pressure sensor is damaged can only be realized in a module section, which can cause the waste of raw materials such as a backlight module, a driving chip and/or a flexible circuit board and the like and increase the manufacturing cost of a display panel by additionally arranging a detection circuit, arranging that the signal input end of the detection circuit is electrically connected with the trigger signal output end of an M-th stage shift register, the signal output end is electrically connected with the trigger signal input end of an M + 1-th stage shift register, and the control end is electrically connected with the first induction signal measuring end or the second induction signal measuring end of the pressure sensor, so that when the detection circuit is used for forming a detection path and inputting a bias voltage signal to the pressure sensor, whether the M + 1-th stage shift register can output a scanning signal to judge whether the pressure sensor is damaged or not, whether unusual the detecting to pressure sensor before the module stage has been realized, the effect of reduction display panel's cost of manufacture.

It should be noted that fig. 1 and fig. 2 only exemplarily show a related structure and a connection relationship of a display panel provided by the present embodiment, and other structures of the display panel are not shown; in addition, the size and position relationship of the pressure sensor, the shift register and the detection circuit are exemplarily shown in fig. 1 and fig. 2, and do not represent the size and relative position of the actual size thereof, and are not limited to the display panel of the present invention, and in other embodiments, a person skilled in the art can set the pressure sensor, the shift register and the detection circuit in any size and position according to the design requirement of the display panel under the teaching of the concept of the present invention.

The detection method of the pressure sensor of the display panel comprises the following steps:

and S110, in the detection stage of the pressure sensor, controlling the detection circuit to form a detection path and inputting a bias voltage signal to the pressure sensor.

In this step, controlling the detection circuit to form the detection path means adjusting the detection circuit to a circuit mode for detection by the pressure sensor. That is, the control signal input terminal 132 and the signal output terminal 133 are electrically connected or disconnected depending only on the magnitude of the signal input from the control terminal 131 of the detection circuit 130.

And S120, detecting whether the shift register of the (M +1) th stage can output the scanning signal.

The specific implementation method of this step is various, for example, the change of the signal on each scanning line can be detected, and the display condition of the display panel can also be observed.

S130, if the M +1 th stage shift register can output scanning signals, judging that the pressure sensor can perform touch pressure detection; otherwise, the pressure sensor is judged to be damaged.

If the M +1 th stage shift register 120/M +1 can output the scan signal, it indicates that the M +1 th stage shift register 120/M +1 can receive the trigger signal from the output of the M stage shift register 120/M, the trigger signal output terminal 121/M of the M stage shift register 120/M and the trigger signal input terminal 122/M +1 of the M +1 th stage shift register 120/M +1 are electrically connected, and further indicates that the pressure sensor 110 is normal, and can perform touch pressure detection. Otherwise, it indicates that the M +1 th stage shift register 120/M +1 cannot receive the trigger signal from the output of the M +1 th stage shift register 120/M, i.e. the trigger signal output terminal 121/M of the M +1 th stage shift register 120/M is disconnected from the trigger signal input terminal 122/M +1 of the M +1 th stage shift register 120/M +1, so that it can be determined that the pressure sensor 110 is damaged.

Fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and fig. 5 is a partial enlarged view of a dotted-line frame 102 in fig. 4. Referring to fig. 4 and 5, in addition to the above embodiments, the display panel 100 includes a plurality of detection circuits 130, the detection circuit 130 electrically connected to the first sensing signal measurement terminal 111 of the pressure sensor 110 through the control terminal 131 (131/Q in fig. 5) is the first detection circuit 130/1301, and the detection circuit 130 electrically connected to the second sensing signal measurement terminal 112 of the pressure sensor 110 through the control terminal 131 (131/Q +1 in fig. 5) is the second detection circuit 130/1302; in the same pressure sensor 110, the signal input terminal 132/Q of the first detection circuit 130/1301 is electrically connected to the trigger signal output terminal 121/Q of the Q-th stage shift register 120/Q, and the signal output terminal 133/Q of the first detection circuit 130/1301 is electrically connected to the trigger signal input terminal 122/Q +1 of the Q + 1-th stage shift register 120/Q + 1; the signal input terminal 132/Q +1 of the second detection circuit 130/1302 is electrically connected to the trigger signal output terminal 121/Q +1 of the Q +1 th stage shift register 120/Q +1, and the signal output terminal 133/Q +1 of the second detection circuit 130/1302 is electrically connected to the trigger signal input terminal 122/Q +2 of the Q +2 th stage shift register 120/Q + 2; wherein N, Q are positive integers, and Q is more than or equal to 1 and more than Q +2 and more than or equal to N.

The essence of the arrangement is that the first detection circuit and the second detection circuit which are electrically connected with the same pressure sensor are electrically connected with a plurality of shift registers with similar distances, so that the length of connecting wires for electrically connecting the first detection circuit, the second detection circuit, the pressure sensor and the shift registers is fully shortened, the layout difficulty of the connecting wires in the display panel is reduced, and the display panel is consistent with the development trend of narrow frame. In addition, the display panel provided by the embodiment further increases the reliability of the detection of the pressure sensor by arranging the detection circuit at the first sensing signal measuring end and the second sensing signal measuring end of the pressure sensor.

The principle of the display panel detecting whether the pressure sensor 110 is damaged is the same as the above. If the pressure sensor 110 is normal, the trigger signal between the shift registers 120 can be transmitted normally, i.e. the shift registers 120/Q +1 of the Q +1 th stage and 120/Q +2 of the Q +2 th stage can both output scanning signals; if the pressure sensor 110 is abnormal, the transmission of the trigger signal between the shift registers 120 is interrupted, i.e., neither the Q +1 th stage shift register 120/Q +1 nor the Q +2 th stage shift register 120/Q +2 can output the scan signal, or only the Q +2 th stage shift register 120/Q +2 cannot output the scan signal.

In the N cascaded shift registers 110, any adjacent three shift registers 110 can be used to connect the detection circuit 130, so as to detect whether the pressure sensor 110 is normal. For example, whether the pressure sensor 110 is normal is detected using a first stage shift register, a second stage shift register, and a third stage shift register; or, detecting whether the pressure sensor 110 is normal by using the second stage shift register, the third stage shift register and the fourth stage shift register; or, detecting whether the pressure sensor 110 is normal by using the Q-th stage shift register, the Q + 1-th stage shift register and the Q + 2-th stage shift register; and the analogy is repeated, or whether the pressure sensor 110 is normal is detected by using the N-2 stage shift register, the N-1 stage shift register and the Nth stage shift register.

In actual implementation, there are various circuit configurations of the test circuit, and a typical example will be described in detail below, but the present application is not limited thereto. Fig. 6 is a schematic structural diagram of a test circuit according to an embodiment of the present invention. As shown in fig. 6, the display panel further includes a general control signal line 104 and a high voltage signal line 105; the detection circuit 130 includes a first N-type thin film transistor 140, a second N-type thin film transistor 150, and a P-type thin film transistor 160; the first N-type tft 140, the second N-type tft 150 and the P-type tft 160 each include a control terminal 1m1, an input terminal 1m2 and an output terminal 1m3 (where m represents 4, 5 or 6, and is specifically denoted by 4, 5 or 6 in fig. 6); the control end 141 of the first N-type thin film transistor 140 and the control end 161 of the P-type thin film transistor 160 are both electrically connected with the master control signal line 104; the input terminal 162 of the P-type thin film transistor 160 is electrically connected to the high voltage signal line 105; the input end 142 of the first N-type thin film transistor 140 is electrically connected to the first sensing signal measuring end 111 or the second sensing signal measuring end 112 of the pressure sensor 110 (the connection end of the pressure sensor 110 is not specifically labeled in fig. 6, and for example, refer to fig. 2 or fig. 5); the output terminal 163 of the P-type thin film transistor 160 and the output terminal 143 of the first N-type thin film transistor 140 are electrically connected to the control terminal 151 of the second N-type thin film transistor 150; the input terminal 152 of the second N-type thin film transistor 150 is electrically connected to the trigger signal output terminal 121/M of the mth stage shift register 120/M, and the output terminal 153 of the second N-type thin film transistor 150 is electrically connected to the trigger signal input terminal 122/M +1 of the M +1 th stage shift register 120/M +1 (in fig. 6, the connection terminal of the shift register 120 is not specifically labeled, for example, see fig. 2 or fig. 5).

In this case, the input terminal 142 of the first N-type thin film transistor 140 corresponds to the control terminal 131 of the detection circuit 130, the input terminal 152 of the second N-type thin film transistor 150 corresponds to the signal input terminal 132 of the detection circuit 130, and the output terminal 153 of the second N-type thin film transistor 150 corresponds to the signal output terminal 133 of the detection circuit 130.

Wherein, a high voltage signal is always transmitted on the high voltage signal line 105.

In the above method for detecting a pressure sensor, the control circuit forms a detection path to input a bias voltage signal to the pressure sensor at a pressure sensor detection stage, and the method includes:

inputting a first voltage signal to the master control signal line to enable the first N-type thin film transistor to be conducted and the P-type thin film transistor to be closed; and inputting a bias voltage signal to the pressure sensor, and enabling the second N-type thin film transistor to be conducted.

Illustratively, in the pressure sensor detection phase, the first voltage signal is a high level signal, a high level signal is input to the global control signal line 104, the P-type thin film transistor 160 is turned off, and the first N-type thin film transistor 140 is turned on. If the pressure sensor 110 is normal, the first sensing signal measuring terminal and the second sensing signal measuring terminal of the pressure sensor 110 both output high level signals, that is, the input terminal 142 of the first N-type thin film transistor 140 inputs a high level signal, and the high level signal passes through the first N-type thin film transistor 140 and then is transmitted to the control terminal 151 of the second N-type thin film transistor 150, so as to control the second N-type thin film transistor 150 to be turned on, so that the trigger signal output from the trigger signal output terminal 121/M of the M-th stage shift register 120/M passes through the second N-type thin film transistor 150 in the detection circuit 130 and then is transmitted to the trigger signal input terminal 122/M +1 of the M + 1-th stage shift register 120/M +1, and finally, the M + 1-th stage shift register 120/M +1 works normally, and outputs a scanning signal. If the pressure sensor 110 is abnormal, at least one of the first sensing signal measuring terminal and the second sensing signal measuring terminal of the pressure sensor 110 cannot output a high level signal, if the sensing signal measuring terminal connected to the input terminal 142 of the first N-type thin film transistor 140 cannot output a high level signal, that is, the input terminal 142 of the first N-type thin film transistor 140 is at a low level, and further the control terminal 151 of the second N-type thin film transistor 150 is at a low level, the second N-type thin film transistor 150 is turned off, the trigger signal output from the trigger signal output terminal 121/M of the M-th stage shift register 120/M cannot be transmitted to the trigger signal input terminal 122/M +1 of the M + 1-th stage shift register 120/M +1 through the second N-type thin film transistor 150 in the detection circuit 130, and the M + 1-th stage shift register 120/M +1 cannot normally operate, the scan signal cannot be output.

The working period of the display panel further comprises a display stage, and in the display stage, the detection circuit is controlled to form a display path. In the display stage, a second voltage signal is input to the master control signal line so as to enable the P-type thin film transistor to be conducted and the first N-type thin film transistor to be closed; and inputting a third voltage signal to the high voltage signal line to enable the second N-type thin film transistor to be conducted.

Specifically, referring to fig. 6, the second voltage signal is a low level signal, the third voltage signal is a high level signal, a low level signal is input to the overall control signal line 104, at this time, the P-type thin film transistor 160 is turned on, the first N-type thin film transistor 140 is turned off, a high level signal is input to the high voltage signal line 105, and since the P-type thin film transistor is in the on state, the control terminal 151 of the second N-type thin film transistor 150 and the output terminal 163 of the P-type thin film transistor 160 are at the same potential and at the high level, the second N-type thin film transistor 150 is turned on, so that the trigger signal can be transmitted from the input terminal 152 to the output terminal 153 of the second N-type thin film transistor 150, that is, the M +1 th shift register 120/M +1 can receive the trigger signal transmitted by the M-th shift register and output the scan signal at the same time.

From the above analysis, the display panel is in the display phase. Since the first N-type thin film transistor 140 is in the off state, the quality of the pressure sensor 110 does not affect the formation of the display path of the entire detection circuit 130.

Above-mentioned technical scheme constitutes detection circuitry through two N type thin film transistor and a P type thin film transistor combination, has realized under the prerequisite that does not influence display panel display function, before the module stage, detects pressure sensor unusual, has reached the effect that reduces display panel's cost of manufacture, and sets up circuit structure simple like this, easily lays.

Fig. 7 is a schematic structural diagram of another test circuit according to an embodiment of the present invention. As shown in fig. 7, the display panel further includes a total control signal line 104 and a high voltage signal line 105; the detection circuit 130 includes a first N-type thin film transistor 170, a second N-type thin film transistor 180, and a P-type thin film transistor 190; the first N-type tft 170, the second N-type tft 180 and the P-type tft 190 each include a control terminal 1N1, an input terminal 1N2 and an output terminal 1N3 (where N represents 7, 8 or 9, and is specifically denoted by 7, 8 or 9 in fig. 7); the input end 171 of the first N-type thin film transistor 170 and the input end 191 of the P-type thin film transistor 190 are both electrically connected with the general control signal line 104; the input end 172 of the first N-type thin film transistor 170 is electrically connected to the high voltage signal line 105; an input end 192 of the P-type thin film transistor 190 is electrically connected to the first sensing signal measuring end 111 or the second sensing signal measuring end 112 of the pressure sensor 110 (the connection end of the pressure sensor 110 is not specifically labeled in fig. 7, and for example, refer to fig. 2 or fig. 5); the output end 173 of the first N-type thin film transistor 170 and the output end 193 of the P-type thin film transistor 190 are both electrically connected with the control end 181 of the second N-type thin film transistor 180; the input end 182 of the second N-type thin film transistor 180 is electrically connected with the trigger signal output end 121/M of the Mth-stage shift register 120/M; the output end 183 of the second N-type thin film transistor 180 is electrically connected to the trigger signal input end 122/M +1 of the M +1 th stage shift register 120/M +1 (the connection end of the shift register 120 is not specifically labeled in fig. 7, and for example, refer to fig. 2 or fig. 5).

In this case, the input terminal 192 of the P-type thin film transistor 190 corresponds to the control terminal 131 of the detection circuit 130, the input terminal 182 of the second N-type thin film transistor 180 corresponds to the signal input terminal 132 of the detection circuit 130, and the output terminal 183 of the second N-type thin film transistor 180 corresponds to the signal output terminal 133 of the detection circuit 130.

inputting a fourth voltage signal to the master control signal line so as to enable the P-type thin film transistor to be conducted and the first N-type thin film transistor to be closed; and inputting a bias voltage signal to the pressure sensor, and enabling the second N-type thin film transistor to be conducted.

Illustratively, in the pressure sensor detection stage, the fourth voltage signal is a low level signal, and a low level signal is input to the global control signal line 104, the first N-type thin film transistor 170 is turned off, and the P-type thin film transistor 190 is turned on. If the pressure sensor 110 is normal, the first sensing signal measuring end and the second sensing signal measuring end of the pressure sensor 110 both output high level signals, that is, the input end 192 of the P-type thin film transistor 190 inputs a high level signal, the high level signal passes through the P-type thin film transistor 190 and then is transmitted to the control end 181 of the second N-type thin film transistor 180, and then the second N-type thin film transistor 180 is turned on, so that the trigger signal output from the trigger signal output end 121/M of the M-th stage shift register 120/M passes through the second N-type thin film transistor 180 in the detection circuit 130 and then is transmitted to the trigger signal input end 122/M +1 of the M + 1-th stage shift register 120/M +1, and finally, the M + 1-th stage shift register 120/M +1 normally operates to output a scanning signal. If the pressure sensor 110 is abnormal, the first sensing signal measuring terminal and the second sensing signal measuring terminal cannot output high level signals, that is, the input terminal 192 of the P-type tft 190 is at a low level, the control terminal 181 of the second N-type tft 180 is at a low level, the second N-type tft 180 is turned off, the trigger signal output from the trigger signal output terminal 121/M of the M-th stage shift register 120/M cannot be transmitted to the trigger signal input terminal 122/M +1 of the M + 1-th stage shift register 120/M +1 through the second N-type tft 180 in the detection circuit 130, and the M + 1-th stage shift register 120/M +1 cannot normally operate and cannot output a scan signal. The pressure sensor detection method further comprises a display stage, wherein in the display stage, a fifth voltage signal is input to the master control signal line so that the first N-type thin film transistor is conducted, and the P-type thin film transistor is closed; and inputting a third voltage signal to the high voltage signal line to enable the second N-type thin film transistor to be conducted.

Specifically, referring to fig. 7, the fifth voltage signal is a high level signal, the third voltage signal is a high level signal, a high level signal is input to the global control signal line 104, the first N-type thin film transistor 170 is turned on, the P-type thin film transistor 190 is turned off, a high level signal is input to the high voltage signal line 105, since the first N-type tft 170 is in a conducting state, the control terminal 181 of the second N-type tft 180 and the output terminal 173 of the first N-type tft 170 are both at a high level, and therefore, the second N-type tft 180 is turned on, so that an electrical signal can be transmitted from the input terminal 182 to the output terminal 183 of the second N-type thin film transistor 180, that is, the M +1 th stage shift register 120/M +1 can receive the trigger signal transmitted from the M-th stage shift register and transmit the trigger signal to the next stage, and output the scan signal.

The display panel is in the display stage, and since the P-type tft 190 is always in the off state, the quality of the pressure sensor 110 does not affect the formation of the display path of the whole detection circuit 130.

Through two N type thin film transistors and a P type thin film transistor constitution detection circuitry, realized not influencing under the prerequisite of display panel display function, before the module stage, whether detect pressure sensor unusually, reached the effect that reduces display panel's cost of manufacture, and set up circuit structure like this and simply, easily lay.

In practical arrangements, the structure of the pressure sensor 110 may be varied, and a detailed description of a typical structure of the pressure sensor 110 is provided below, but is not intended to limit the present invention.

Fig. 8 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention. Referring to fig. 8, the pressure sensor 110 includes a sensor body 1100. The sensor body 1100 has a quadrilateral shape including first and second oppositely disposed

sides

1101, 1102 and third and fourth oppositely disposed

sides

1103, 1104. The pressure sensor 110 includes a first power signal input terminal Vin1 on the first side 1101 and a second power signal input terminal Vin2 on the second side 1102 for inputting a bias voltage signal to the pressure sensor; the pressure sensor 110 further includes a first sensing signal measuring terminal Vout1 (corresponding to 111 in fig. 2 and 5) located on the third side 1103 and a second sensing signal measuring terminal Vout2 (corresponding to 112 in fig. 2 and 5) located on the fourth side 1104 for outputting a pressure sensing signal. The pressure sensing detection signal output by the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 of the pressure sensor 110 is an absolute value of a difference between a potential value of the first sensing signal measuring terminal Vout1 and a potential value of the second sensing signal measuring terminal Vout 2.

Fig. 9 is an equivalent circuit diagram of the pressure sensor of fig. 8. Referring to fig. 8 and 9, the pressure sensor may be equivalent to a wheatstone bridge, which includes four equivalent resistors, namely, an equivalent resistor Ra, an equivalent resistor Rb, an equivalent resistor Rc and an equivalent resistor Rd, wherein the region between the second power signal input terminal Vin2 and the first sensing signal measurement terminal Vout1 is the equivalent resistor Ra, the region between the second power signal input terminal Vin2 and the second sensing signal measurement terminal Vout2 is the equivalent resistor Rb, the region between the first power signal input terminal Vin1 and the first sensing signal measurement terminal Vout1 is the equivalent resistor Rd, and the region between the first power signal input terminal Vin1 and the second sensing signal measurement terminal Vout2 is the equivalent resistor Rc. When the bias voltage signals are input to the first power signal input terminal Vin1 and the second power signal input terminal Vin2, current flows through each branch of the wheatstone bridge. At this time, when the display panel is pressed, the pressure sensor 110 is subjected to a shearing force from a position corresponding to the display panel, and the impedance of at least one of the internal equivalent resistance Ra, the equivalent resistance Rb, the equivalent resistance Rc, and the equivalent resistance Rd of the pressure sensor 110 is changed, so that the pressure sensing signals output from the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 of the pressure sensor 110 are different from the pressure sensing signals output from the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 of the pressure sensor 110 when no pressure is applied, and thus, the magnitude of the touch pressure can be determined.

Alternatively, the sensor body 1100 may be square in shape. The advantage of this arrangement is that it is beneficial to make the resistances of the equivalent resistor Ra, the equivalent resistor Rb, the equivalent resistor Rc and the equivalent resistor Rd the same, so that, under the condition of no pressing, the potentials between the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 are equal, and the pressure sensing signals output by the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 are 0, which is beneficial to simplifying the calculation process of the pressure value and improving the sensitivity of the pressure sensing.

Fig. 10 is a schematic structural diagram of another pressure sensor according to an embodiment of the present invention. Referring to fig. 10, the pressure sensor 110 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first power signal input terminal Vin1, a second power signal input terminal Vin2, a first sensing signal measuring terminal Vout1, and a second sensing signal measuring terminal Vout 2. A first end of the first resistor R1 and a first end of the fourth resistor R4 are electrically connected to the first power signal input terminal Vin1, a second end of the first resistor R1 and a first end of the second resistor R2 are electrically connected to the first sensing signal measurement terminal Vout1, a second end of the fourth resistor R4 and a first end of the third resistor R3 are electrically connected to the second sensing signal measurement terminal Vout2, and a second end of the second resistor R2 and a second end of the third resistor R3 are electrically connected to the second power signal input terminal Vin 2. The first and second power signal inputs Vin1 and Vin2 are used for inputting bias voltage signals to the pressure sensor 110; the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 are used to output a pressure sensing signal from the pressure sensor 13.

With continued reference to fig. 10, the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 form a wheatstone bridge configuration. When the bias voltage signals are input to the first power signal input terminal Vin1 and the second power signal input terminal Vin2, current flows through each branch of the wheatstone bridge. At this time, when the display panel including the array substrate is pressed, the resistance values of the resistors (including the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4) inside the pressure sensor are changed due to the shearing force from the corresponding position on the display panel, so that the pressure sensing signals output by the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 of the pressure sensor are different from the pressure sensing signals output by the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 of the pressure sensor when no pressure is applied, and accordingly, the magnitude of the touch pressure can be determined.

On this basis, optionally, in the non-pressed state, the ratio of the resistance value of the first resistor R1 to the resistance value of the second resistor R2 is set equal to the ratio of the resistance value of the fourth resistor R4 to the resistance value of the third resistor R3. This arrangement has the advantage that when the bias voltage signal is applied to the pressure sensor 110 and the resistances of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 satisfy the above relationship, the voltage division at the first resistor R1 is the same as the voltage division at the fourth resistor R4, and the voltage division at the second resistor R2 is the same as the voltage division at the third resistor R3. When there is no pressing, the voltage between the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 of the pressure sensor is equal, and the pressure sensing detection signal output by the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 is 0. The pressure sensor 110 outputs a pressure detection signal equal to the amount of change in the pressure detection signal output by the pressure sensor 13 before and after pressing. Therefore, the calculation process of the touch pressure value is simplified, and the response time of the display panel executing corresponding operation according to the touch pressure is shortened.

Typically, in the no-press state, the resistances of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are all equal. Therefore, under the condition of no pressing, the electric potentials between the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 are equal, and the pressure sensing detection signal output by the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 is 0, which is beneficial to simplifying the calculation process of the touch pressure value and reducing the response time of the display panel executing corresponding operations according to the magnitude of the touch pressure.

With continued reference to fig. 10, the first resistor R1 and the third resistor R3 have a greater extension in the first direction 200 than in the second direction 300, and the second resistor R2 and the fourth resistor R4 have a greater extension in the second direction 300 than in the first direction 200; the first direction 200 and the second direction 300 are both parallel to the plane of the display panel, and the first direction 200 intersects the second direction 300.

The arrangement is such that the first resistor R1 and the third resistor R3 primarily sense strain in the first direction 200, and the second resistor R2 and the fourth resistor R4 primarily sense the second direction 300. The direction of the first resistor R1 sensing strain is different from the direction of the second resistor R2 sensing strain, the direction of the fourth resistor R4 sensing strain is different from the direction of the third resistor R3 sensing strain, and then the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are arranged at the same position in space or at positions close to each other in distance, so that the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 have synchronous temperature changes, the influence of temperature difference is eliminated, and the pressure sensing precision is improved.

Further, optionally, the first direction 200 and the second direction 300 are perpendicular. Because the difference of the deformation amount of the same position in the mutually perpendicular directions is the largest in the pressing process, the first direction 200 is set to be perpendicular to the second direction 300, the pressure sensing detection signals output by the first sensing signal measuring end Vout1 and the second sensing signal measuring end Vout2 of the pressure sensor can be further increased, and the sensitivity of the pressure sensor is improved.

In practical implementation, the materials of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are optionally amorphous silicon materials or polysilicon materials, considering that the strain sensitivity coefficient of the semiconductor material is higher than that of the metal material by an order of magnitude. Specifically, optionally, the materials of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are all P-type semiconductor materials; or the materials of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are all N-type semiconductor materials; or the first resistor R1 and the second resistor R2 are P-type resistors; the third resistor R3 and the fourth resistor R4 are N-type resistors. This arrangement can improve the sensitivity of the pressure sensor.

It should be noted that fig. 8 and fig. 10 are only schematic structural diagrams illustrating two types of pressure sensors, and do not limit the present invention.

Fig. 11 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and as shown in fig. 11, a substrate 100 includes a display area 102 and a non-display area 104 surrounding the display area 102; the pressure sensor 110 and the shift register 120 are both located in the non-display area 104 of the display panel.

By the arrangement, the pressure sensor does not occupy the area of the display area, does not influence the display effect, and is convenient for realizing the narrow frame design of the display panel.

It should be noted that fig. 11 only shows the positional relationship between the pressure sensor and the shift register with respect to the display area and the non-display area of the substrate, and the relative positional relationship between the pressure sensor and the shift register can be arbitrarily set according to actual needs, which is not limited in this embodiment.

The embodiment of the invention also provides a display device. Fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 12, the display device 10 includes any one of the display panels provided in the embodiments of the present invention, and the display device 10 may be a mobile phone, a tablet computer, a smart wearable device, and the like.

The display device provided by the embodiment of the invention solves the problem that the detection aiming at judging whether the pressure sensor is damaged can only be realized in a module section, which can cause the waste of raw materials such as a backlight module, a driving chip and/or a flexible circuit board and the like and increase the manufacturing cost of a display panel by additionally arranging the detection circuit, arranging the signal input end of the detection circuit to be electrically connected with the trigger signal output end of the M-th stage shift register, arranging the signal output end of the detection circuit to be electrically connected with the trigger signal input end of the M + 1-th stage shift register, arranging the control end to be electrically connected with the first induction signal measuring end or the second induction signal measuring end of the pressure sensor so as to form a detection path in the detection circuit, and judging whether the pressure sensor is damaged by detecting whether the M + 1-th stage shift register can output a scanning signal when a bias voltage signal is input to the pressure sensor, whether unusual the detecting to pressure sensor before the module stage has been realized, the effect of reduction display panel's cost of manufacture.

The embodiment of the invention also provides a detection method of the pressure sensor of the display panel. Fig. 13 is a flowchart of a method for detecting a pressure sensor of a display panel according to an embodiment of the present invention. The display panel is any one of the display panels provided by any embodiment of the invention.

Referring to fig. 1 and 2, the display panel includes: a base substrate 100; at least one pressure sensor 110 formed on the substrate base plate 100, the pressure sensor 110 including a first sensing signal measuring terminal 111 and a second sensing signal measuring terminal 112 for outputting a pressure sensing detection signal from the pressure sensor 110, respectively; n cascaded shift registers 120 formed on a substrate for outputting a scan signal, the shift registers 120 including a trigger signal output terminal 121 and a trigger signal input terminal 122, wherein the trigger signal output terminal 121 provides a signal to the trigger signal input terminal 122 of the next stage shift register 120, and the trigger signal input terminal 121 receives a signal output from the trigger signal output terminal 121 of the previous stage shift register 120; and at least one detection circuit 130, the detection circuit 130 comprising a control terminal 131, a signal input terminal 132 and a signal output terminal 133; the signal input end 132 of the detection circuit 130 is electrically connected with the trigger signal output end 121/M of the Mth-stage shift register 120/M; the signal output end 133 of the detection circuit 130 is electrically connected with the trigger signal input end 122/M +1 of the M +1 th stage shift register 130/M + 1; the first sensing signal measuring end 111 or the second sensing signal measuring end 112 of the pressure sensor 110 is electrically connected with the control end 131 of the detection circuit 130; the detection circuit 130 is used for judging whether the pressure sensor 110 is damaged or not by detecting whether the shift register of the (M +1) th stage can output a scanning signal or not when the detection circuit 130 forms a passage and inputs a bias voltage signal to the pressure sensor 110; wherein N, M are positive integers, and M is more than or equal to 1 and less than or equal to M +1 and less than or equal to N.

Referring to fig. 13, the method for detecting the pressure sensor of the display panel includes:

If the (M +1) th stage shift register can output the scan signal, performing step S130; otherwise, step S140 is executed.

And S130, judging that the pressure sensor can detect the touch pressure.

And S140, judging that the pressure sensor is damaged.

In the method for detecting a pressure sensor of a display panel provided in this embodiment, a signal input end of a detection circuit is electrically connected to a trigger signal output end of an M-th stage shift register, a signal output end of the detection circuit is electrically connected to a trigger signal input end of an M + 1-th stage shift register, and a control end of the detection circuit is electrically connected to a first sensing signal measurement end or a second sensing signal measurement end of a pressure sensor, so as to form a detection path in the detection circuit, and when a bias voltage signal is input to the pressure sensor, whether the pressure sensor is damaged or not is determined by detecting whether the M + 1-th stage shift register can output a scan signal, thereby solving the problem that the current detection for determining whether the pressure sensor is damaged can only be implemented in a module section, which may cause waste of raw materials such as a backlight module, a driving chip, and/or a flexible circuit board, and thus increase, whether unusual the detecting to pressure sensor before the module stage has been realized, the effect of reduction display panel's cost of manufacture.

Further, referring to fig. 6, the display panel further includes a general control signal line 104 and a high voltage signal line 105; the detection circuit 130 includes a first N-type thin film transistor 140, a second N-type thin film transistor 150, and a P-type thin film transistor 160; the first N-type tft 140, the second N-type tft 150 and the P-type tft 160 each include a control terminal 1m1, an input terminal 1m2 and an output terminal 1m3 (where m represents 4, 5 or 6, and is specifically denoted by 4, 5 or 6 in fig. 6); the control end 141 of the first N-type thin film transistor 140 and the control end 161 of the P-type thin film transistor 160 are both electrically connected with the master control signal line 104; the input terminal 162 of the P-type thin film transistor 160 is electrically connected to the high voltage signal line 105; the input end 142 of the first N-type thin film transistor 140 is electrically connected to the first sensing signal measuring end 111 or the second sensing signal measuring end 112 of the pressure sensor 110 (the connection end of the pressure sensor 110 is not specifically labeled in fig. 6, and for example, refer to fig. 2 or fig. 5); the output terminal 163 of the P-type thin film transistor 160 and the output terminal 143 of the first N-type thin film transistor 140 are electrically connected to the control terminal 151 of the second N-type thin film transistor 150; the input terminal 152 of the second N-type thin film transistor 150 is electrically connected to the trigger signal output terminal 121/M of the mth stage shift register 120/M, and the output terminal 153 of the second N-type thin film transistor 150 is electrically connected to the trigger signal input terminal 122/M +1 of the M +1 th stage shift register 120/M +1 (in fig. 6, the connection terminal of the shift register 120 is not specifically labeled, for example, see fig. 2 or fig. 5).

Thus, step S110 may include:

Furthermore, the working period of the display panel also comprises a display stage, in the display stage, a second voltage signal is input to the master control signal line so as to enable the P-type thin film transistor to be conducted, and the first N-type thin film transistor to be closed; and inputting a third voltage signal to the high voltage signal line to enable the second N-type thin film transistor to be conducted.

Set up like this and to realize not influencing under the prerequisite of display panel display function, before the module stage, whether detect pressure sensor unusually, reached the effect that reduces display panel's cost of manufacture, and set up circuit structure simple like this, easily lay.

Further, referring to fig. 7, the display panel further includes a general control signal line 104 and a high voltage signal line 105; the detection circuit 130 includes a first N-type thin film transistor 170, a second N-type thin film transistor 180, and a P-type thin film transistor 190; the first N-type tft 170, the second N-type tft 180 and the P-type tft 190 each include a control terminal 1N1, an input terminal 1N2 and an output terminal 1N3 (where N represents 7, 8 or 9, and is specifically denoted by 7, 8 or 9 in fig. 7); the input end 171 of the first N-type thin film transistor 170 and the input end 191 of the P-type thin film transistor 190 are both electrically connected with the general control signal line 104; the input end 172 of the first N-type thin film transistor 170 is electrically connected to the high voltage signal line 105; an input end 192 of the P-type thin film transistor 190 is electrically connected to the first sensing signal measuring end 111 or the second sensing signal measuring end 112 of the pressure sensor 110 (the connection end of the pressure sensor 110 is not specifically labeled in fig. 7, and for example, refer to fig. 2 or fig. 5); the output end 173 of the first N-type thin film transistor 170 and the output end 193 of the P-type thin film transistor 190 are both electrically connected with the control end 181 of the second N-type thin film transistor 180; the input end 182 of the second N-type thin film transistor 180 is electrically connected with the trigger signal output end 121/M of the Mth-stage shift register 120/M; the output end 183 of the second N-type thin film transistor 180 is electrically connected to the trigger signal input end 122/M +1 of the M +1 th stage shift register 120/M +1 (the connection end of the shift register 120 is not specifically labeled in fig. 7, and for example, refer to fig. 2 or fig. 5).

Thus, step S110 may further include:

Furthermore, the working period of the display panel also comprises a display stage, in the display stage, a fifth voltage signal is input to the master control signal line, so that the first N-type thin film transistor is switched on, and the P-type thin film transistor is switched off; and inputting a third voltage signal to the high voltage signal line to enable the second N-type thin film transistor to be conducted.

Set up like this and realized under the prerequisite that does not influence display panel display function, before the module stage, whether detect pressure sensor unusually, reached the effect that reduces display panel's cost of manufacture, and set up circuit structure simple like this, easily lay.

Considering that the display device may fall off from a hand during the actual use of the display device (e.g., a mobile phone), the display device collides with a hard object such as the ground, and the pressure sensor is damaged, optionally, in practice, the detection of the pressure sensor may be performed not only during the production and manufacturing process of the display panel, but also after the display panel is shipped from a factory, or even after the display panel is assembled in the display device, for example, before each touch pressure detection, or after each power-on.

Fig. 14 is a flowchart of another method for detecting a pressure sensor of a display panel according to an embodiment of the present invention, as shown in fig. 14, before step S110, the method further includes:

and S100, judging whether a starting instruction of the pressure sensor is acquired currently.

In this step, if a start instruction of the pressure sensor is acquired, step S110 is executed; otherwise, the display panel displays normally.

The starting instruction of the pressure sensor can be an instruction generated by the display panel based on a command such as starting or touch pressure detection and the like, and can also be an instruction input by a user.

After step S130, the method further includes:

and S150, continuing to input the bias voltage signal to the pressure sensor, and controlling the detection circuit to form an open circuit.

In this step, since the pressure sensor is normal, the operation of inputting the bias voltage signal to the pressure sensor is continuously performed to perform the touch function; meanwhile, the detection circuit is controlled to form an open circuit, so that the display panel can normally display and execute a touch function.

After step S140, the method further includes:

and S160, executing the operation of stopping inputting the bias voltage signal to the pressure sensor, and controlling the detection circuit to form an open circuit.

In this step, since the pressure sensor is abnormal and the touch function cannot be performed, the operation of stopping the input of the bias voltage signal to the pressure sensor may be performed to reduce the power consumption of the display panel. Meanwhile, the detection circuit is controlled to form an open circuit, so that the display panel can normally display and execute a touch function.

According to the technical scheme, the pressure sensor can be timely detected according to the condition, and the operation of inputting the bias voltage signal to the pressure sensor is adjusted according to whether the pressure sensor is damaged or not, so that the display panel can be timely adjusted to be in a low power consumption state, and the user experience is improved.

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 modifications, rearrangements, combinations 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:

a substrate base plate;

and at least one detection circuit; the detection circuit comprises a control end, a signal input end and a signal output end; the signal input end of the detection circuit is electrically connected with the trigger signal output end of the Mth-stage shift register; the signal output end of the detection circuit is electrically connected with the trigger signal input end of the shift register of the (M +1) th stage; the first induction signal measuring end or the second induction signal measuring end is electrically connected with the control end of the detection circuit; the detection circuit is used for forming a detection path so that when a bias voltage signal is input to the pressure sensor, whether the pressure sensor is damaged or not is judged by detecting whether the shift register of the (M +1) th stage can output a scanning signal or not;

2. The display panel according to claim 1, wherein the display panel comprises a plurality of detection circuits; the detection circuit electrically connected with the first induction signal measuring end of the pressure sensor through the control end is a first detection circuit; the detection circuit electrically connected with the second sensing signal measuring end of the pressure sensor through the control end is a second detection circuit;

in the same pressure sensor, a signal input end of the first detection circuit is electrically connected with a trigger signal output end of the Q-th-stage shift register, and a signal output end of the first detection circuit is electrically connected with a trigger signal input end of the Q + 1-th-stage shift register; the signal input end of the second detection circuit is electrically connected with the trigger signal output end of the shift register of the Q +1 th stage, and the signal output end of the second detection circuit is electrically connected with the trigger signal input end of the shift register of the Q +2 th stage;

wherein N, Q are positive integers, and Q is more than or equal to 1 and more than Q +2 and more than or equal to N.

3. The display panel according to claim 1, further comprising a total control signal line and a high voltage signal line;

the detection circuit comprises a first N-type thin film transistor, a second N-type thin film transistor and a P-type thin film transistor;

the first N-type thin film transistor, the second N-type thin film transistor and the P-type thin film transistor respectively comprise a control end, an input end and an output end;

the control end of the first N-type thin film transistor and the control end of the P-type thin film transistor are both electrically connected with the master control signal line,

the input end of the P-type thin film transistor is electrically connected with the high-voltage signal line;

the input end of the first N-type thin film transistor is electrically connected with the first sensing signal measuring end or the second sensing signal measuring end of the pressure sensor;

the output end of the P-type thin film transistor and the output end of the first N-type thin film transistor are both electrically connected with the control end of the second N-type thin film transistor;

the input end of the second N-type thin film transistor is electrically connected with the trigger signal output end of the Mth-stage shift register;

and the output end of the second N-type thin film transistor is electrically connected with the trigger signal input end of the shift register of the (M +1) th stage.

4. The display panel according to claim 1, further comprising a total control signal line and a high voltage signal line;

the control end of the first N-type thin film transistor and the control end of the P-type thin film transistor are electrically connected with the master control signal line;

the input end of the first N-type thin film transistor is electrically connected with the high-voltage signal line;

the input end of the P-type thin film transistor is electrically connected with the first induction signal measuring end or the second induction signal measuring end of the pressure sensor;

the output end of the first N-type thin film transistor and the output end of the P-type thin film transistor are both electrically connected with the control end of the second N-type thin film transistor;

5. The display panel according to claim 1,

the pressure sensor also comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first power supply signal input end and a second power supply signal input end;

a first end of the first resistor and a first end of the fourth resistor are electrically connected with the first power signal input end, a second end of the first resistor and a first end of the second resistor are electrically connected with the first sensing signal measuring end, a second end of the fourth resistor and a first end of the third resistor are electrically connected with the second sensing signal measuring end, and a second end of the second resistor and a second end of the third resistor are electrically connected with the second power signal input end;

the first power supply signal input terminal and the second power supply signal input terminal are used for inputting bias voltage signals.

6. The display panel according to claim 1,

the pressure sensor also comprises a sensor main body, a first power supply signal input end and a second power supply signal input end;

the sensor main body is made of semiconductor materials; the sensor main body is of a polygonal structure comprising at least four sides, and comprises a first side, a second side and a third side, wherein the first side and the second side are not connected with each other, the third side and the fourth side are not connected with each other, the first power supply signal input end is positioned on the first side, and the second power supply signal input end is positioned on the second side and is used for inputting bias voltage signals to the pressure sensor; the first induction signal measuring end is located on the third side, and the second induction signal measuring end is located on the fourth side;

7. The display panel according to claim 1, wherein the substrate base plate includes a display area and a non-display area surrounding the display area;

the pressure sensor and the shift register are both located in a non-display area of the display panel.

8. A display device characterized by comprising the display panel according to any one of claims 1 to 7.

9. A method for detecting a pressure sensor of a display panel, the display panel comprising:

a substrate base plate;

10. The pressure sensor detecting method according to claim 9,

the display panel also comprises a master control signal line and a high-voltage signal line;

the output end of the second N-type thin film transistor is electrically connected with the trigger signal input end of the shift register of the (M +1) th stage;

in the pressure sensor detection stage, controlling the detection circuit to form a detection path, and inputting a bias voltage signal to the pressure sensor includes:

inputting a first voltage signal to the master control signal line so as to enable the first N-type thin film transistor to be conducted and the P-type thin film transistor to be closed; and inputting a bias voltage signal to the pressure sensor, and enabling the second N-type thin film transistor to be conducted.

11. The pressure sensor detecting method according to claim 10,

the working period of the display panel also comprises a display stage;

in the display stage, inputting a second voltage signal to the master control signal line so as to enable the P-type thin film transistor to be conducted and the first N-type thin film transistor to be closed; and inputting a third voltage signal to the high-voltage signal line so as to enable the second N-type thin film transistor to be conducted.

12. The pressure sensor detecting method according to claim 9,

in the pressure sensor detection stage, controlling the detection circuit to form a detection path, and inputting a bias voltage signal to the pressure sensor, the method includes:

13. The pressure sensor detecting method according to claim 12,

the working period of the display panel also comprises a display stage;

in the display stage, inputting a fifth voltage signal to the master control signal line so as to enable the first N-type thin film transistor to be switched on and the P-type thin film transistor to be switched off; and inputting a third voltage signal to the high-voltage signal line so as to enable the second N-type thin film transistor to be conducted.

14. The pressure sensor detecting method according to claim 9,

before controlling the detection circuit to form a detection path and inputting a bias voltage signal to the pressure sensor, the method further comprises:

judging whether a starting instruction of the pressure sensor is acquired currently;

if yes, controlling the detection circuit to form a passage, and inputting a bias voltage signal to the pressure sensor;

after determining that the pressure sensor can perform touch pressure detection, the method further includes:

continuing to perform an operation of inputting a bias voltage signal to the pressure sensor and controlling the detection circuit to form an open circuit;

after determining that the pressure sensor is damaged, the method further comprises:

an operation of stopping the input of the bias voltage signal to the pressure sensor is performed, and the detection circuit is controlled to form an open circuit.