CN107491217B

CN107491217B - Display panel and display device

Info

Publication number: CN107491217B
Application number: CN201710762963.9A
Authority: CN
Inventors: 郑斌义; 吴玲; 沈柏平; 郑丽华
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2017-08-30
Filing date: 2017-08-30
Publication date: 2020-11-13
Anticipated expiration: 2037-08-30
Also published as: CN107491217A

Abstract

The invention provides a display panel and a display device, the display panel comprises a display area and a non-display area surrounding the display area, the non-display area on a substrate is provided with a plurality of pressure sensors and a driving circuit; the pressure sensor comprises a first input end, a second input end, a first output end and a second output end which are respectively and electrically connected with the driving circuit through a first power supply signal line, a second power supply signal line, a first induction signal line and a second induction signal line; at least one of the first power signal line, the second power signal line, the first sensing signal line and the second sensing signal line includes a first sub-signal connection line and a second sub-signal connection line which are electrically connected; in any two pressure sensors, the difference value of the sum of the resistances of the first sub-signal connecting line and the second sub-signal connecting line which are electrically connected is smaller than a first preset value, so that the pressure detection sensitivity of each pressure sensor is improved.

Description

Display panel and display device

Technical Field

The invention relates to the technical field of display, in particular to a display panel and a display device.

Background

The pressure sensing technology is that a pressure sensing device is added on a display screen, and different interaction effects can be brought by the finger touching the display screen and the finger pressing. The screen can feel different forces such as light points, common touch, heavy pressure and the like, the finger operation can be felt more three-dimensionally, and more diversified operation modes can be realized.

In the conventional pressure sensing display panel, the pressure sensing touch unit is generally arranged in a non-display area of the display panel, so that the pressure sensing touch unit is prevented from influencing normal display of the display area. At present, the length-width ratio of display devices such as mobile phones is made to be larger and larger, because the distances between the pressure sensors located at non-display areas and the driving circuit are different, and the pressure sensors are electrically connected with the driving circuit located at the bottom of the display panel through signal lines, the lengths of the signal lines connected with the pressure sensors are different, so that the signal transmission voltage drops of the pressure sensors are different, and the pressure detection sensitivities of the pressure sensors adjacent to the driving circuit and the pressure sensors far away from the driving circuit are inconsistent, so that the accuracy of pressure detection is affected.

Disclosure of Invention

The invention provides a display panel and a display device, which aim to reduce the problem of inconsistent detection sensitivity of pressure sensors at different positions.

In a first aspect, an embodiment of the present invention provides a display panel, including a display area and a non-display area surrounding the display area, including:

a substrate;

the non-display area on the substrate is provided with a plurality of pressure sensors and a driving circuit; the display area is provided with a plurality of data lines and a plurality of scanning lines;

the pressure sensor comprises a first output end, a second output end, a first input end and a second input end; the first input end, the second input end, the first output end and the second output end are electrically connected with the driving circuit through a first power supply signal line, a second power supply signal line, a first induction signal line and a second induction signal line respectively;

at least one of the first power signal line, the second power signal line, the first sensing signal line and the second sensing signal line includes a first sub-signal connection line and a second sub-signal connection line which are electrically connected; the extending direction of the first sub-signal connecting line is parallel to the extending direction of the data line; the extending direction of the second sub-signal connecting line is parallel to the extending direction of the scanning line; the first sub-signal connecting line is connected with a corresponding interface of the driving circuit, and the second sub-signal connecting line is connected with at least one of a first output end, a second output end, a first input end and a second input end corresponding to the pressure sensor;

in any two of the pressure sensors, a difference value between a sum of resistances of the first power signal line, the second power signal line, the first sensing signal line, or the second sensing signal line of the first sub-signal connection line and the second sub-signal connection line which are electrically connected is smaller than a first preset value.

In a second aspect, an embodiment of the present invention further provides a display device, including the display panel according to the first aspect.

The invention sets at least one of a first power supply signal wire, a second power supply signal wire, a first induction signal wire and a second induction signal wire which are connected with a pressure sensor as a first sub-signal connecting wire and a second sub-signal connecting wire which are electrically connected, wherein the extending direction of the first sub-signal connecting wire is parallel to the extending direction of a data wire; the extending direction of the second sub-signal connecting line is parallel to the extending direction of the scanning line, so that the difference value of the sum of the resistances of the first sub-signal connecting line and the second sub-signal connecting line which are electrically connected in any two pressure sensors is smaller than a first preset value, that is, the resistance difference value of the first power signal line, the second power signal line, the first sensing signal line or the second sensing signal line which are electrically connected in any two pressure sensors and comprise the first sub-signal connecting line and the second sub-signal connecting line is reduced as much as possible, so that the voltage drop of signal transmission corresponding to different pressure sensors is equal as much as possible, and the consistency of the pressure detection sensitivity of the pressure sensor close to the driving circuit and the pressure sensor far away from the driving circuit is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

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 FIG. 1;

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

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

FIG. 5 is a partial schematic view of a display panel according to another embodiment of the present invention;

fig. 6 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention;

fig. 7 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view taken along the direction AA' in FIG. 7;

fig. 9 is a partial structural view of another display panel according to an embodiment of the present invention;

FIG. 10 is a cross-sectional view taken along the direction BB' in FIG. 9;

fig. 11 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention;

FIG. 12 is a cross-sectional view taken along the direction CC' in FIG. 11;

FIG. 13 is a further cross-sectional view taken along the direction AA' in FIG. 7;

fig. 14 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of another pressure sensor provided in accordance with an embodiment of the present invention;

FIG. 16 is a schematic structural diagram of another pressure sensor according to an embodiment of the present invention

Fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through embodiments with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The display panel provided by the embodiment of the invention comprises a display area and a non-display area surrounding the display area, and the display panel also comprises a substrate; a plurality of pressure sensors and a driving circuit are arranged in a non-display area on the substrate; the display area is provided with a plurality of data lines and a plurality of scanning lines. The pressure sensor comprises a first output end, a second output end, a first input end and a second input end; the first input end, the second input end, the first output end and the second output end are respectively and electrically connected with the driving circuit through a first power supply signal line, a second power supply signal line, a first induction signal line and a second induction signal line. The first input end and the second input end of the pressure sensor respectively obtain power supply driving signals through a first power supply signal line and a second power supply signal line, and the first output end and the second output end of the pressure sensor respectively output pressure sensing signals to the driving circuit through a first sensing signal line and a second sensing signal line.

The display panel provided by the invention is also provided with at least one of the first power supply signal line, the second power supply signal line, the first sensing signal line and the second sensing signal line which comprises a first sub-signal connecting line and a second sub-signal connecting line which are electrically connected. The extending direction of the first sub-signal connecting line is parallel to the extending direction of the data line; the extending direction of the second sub-signal connecting line is parallel to the extending direction of the scanning line; the first sub-signal connecting line is connected with a corresponding interface of the driving circuit, and the second sub-signal connecting line is connected with at least one of a first output end, a second output end, a first input end and a second input end of the pressure sensor. And in any two pressure sensors in the display panel, the difference value of the sum of the resistances of the electrically connected first sub-signal connecting line and the electrically connected second sub-signal connecting line is smaller than a first preset value.

For example, the first power signal lines of all the pressure sensors are set as the electrically connected first sub-signal connection lines and second sub-signal connection lines, and since the difference between the sum of the resistances of the electrically connected first sub-signal connection lines and second sub-signal connection lines in any two pressure sensors is smaller than the first preset value, that is, the difference between the resistances of the first power signal lines of any two pressure sensors is smaller than the first preset value, the difference between the voltage drop losses of the signals is reduced when the first power signal lines of all the pressure sensors in the display panel perform signal transmission. For example, the first power signal line, the second power signal line, the first sensing signal line or the second sensing signal line of all the pressure sensors are electrically connected to the first sub-signal connecting line and the second sub-signal connecting line, the difference in resistance of the first power signal line including the electrically connected first sub-signal connecting line and the electrically connected second sub-signal connecting line in any two of the pressure sensors is smaller than a first preset value, the difference in resistance of the second power signal line including the electrically connected first sub-signal connecting line and the electrically connected second sub-signal connecting line in any two of the pressure sensors is smaller than a first preset value, the difference in resistance of the first sensing signal line including the electrically connected first sub-signal connecting line and the electrically connected second sub-signal connecting line in any two of the pressure sensors is smaller than a first preset value, the difference in resistance of the second sensing signal line including the electrically connected first sub-signal connecting line and the electrically connected second sub-signal connecting line in any two of the pressure sensors is, the difference of voltage drop loss of signals is reduced when the first power signal line, the second power signal line, the first sensing signal line and the second sensing signal line of all the pressure sensors in the display panel transmit signals.

In any two pressure sensors of the display panel, the difference value of the sum of the resistances of the first sub-signal connecting line and the second sub-signal connecting line which are electrically connected is smaller than a first preset value, so that when the pressure sensors transmit signals through at least one of the first power signal line, the second power signal line, the first induction signal line and the second induction signal line which comprise the first sub-signal connecting line and the second sub-signal connecting line which are electrically connected, the voltage drop loss difference of the signals is reduced, and the consistency of the pressure detection sensitivity of the pressure sensors and the accuracy of the pressure detection of the display panel are improved.

It should be noted that the first preset value may be specifically set according to the actual design condition of the display panel, for example, when the pressure sensor of the display panel is only used to detect whether there is a press in the display panel, the size of the first preset value may be reasonably increased, and if the pressure sensor of the display panel is used to detect the specific degree of the press in the display panel, the size of the first preset value needs to be appropriately decreased, so as to make the first preset value close to zero as much as possible. In addition, the magnitude of the first preset value is generally related to the driving detection capability of the driving circuit of the display panel, and if the driving detection capability of the driving circuit of the display panel is strong, the magnitude of the first preset value can be increased appropriately, otherwise, the magnitude of the first preset value can be decreased appropriately. The person skilled in the art can adjust the size of the first preset value according to the actual situation under the teaching of the inventive concept.

The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and as shown in fig. 1, the display panel according to the embodiment of the present invention includes a display area 10 and a non-display area 20 surrounding the display area. The display panel provided by the embodiment of the invention further comprises a substrate 11, and a plurality of pressure sensors 12 and a driving circuit 13 are arranged in a non-display area 20 on the substrate 11. The display area 10 is provided with a plurality of data lines 14 and a plurality of scan lines 15. The connection of the respective pressure sensors 12 to the drive circuit 13 is not shown in fig. 1. Fig. 2 is a partially enlarged view of fig. 1, and fig. 2 shows the connection of each pressure sensor 12 to the drive circuit 13. Referring to fig. 2, the pressure sensor 12 includes a first output 121, a second output 122, a first input 123, and a second input 124. The first input terminal 123, the second input terminal 124, the first output terminal 121, and the second output terminal 122 are electrically connected to the driver circuit 13 via the first power signal line 16, the second power signal line 17, the first sense signal line 18, and the second sense signal line 19, respectively. Since the pressure sensors 12 are spaced apart from the driver circuit 13, the lengths of the first power signal line 16, the second power signal line 17, the first sense signal line 18, and the second sense signal line 19, which transmit signals to the pressure sensors 12 and the driver circuit 13, are different. As the distance between the pressure sensor 12 and the driver circuit 13 is larger, the longer the length of the first power supply signal line 16, the second power supply signal line 17, the first sense signal line 18, or the second sense signal line 19, which transmits signals between the pressure sensor 12 and each driver circuit 13, the larger the signal drop, and therefore, the signal transmission loss of the pressure sensor 12 at different positions is different depending on the distance between the pressure sensor 12 and the driver circuit 13, and the pressure detection sensitivity of the pressure sensor 12 adjacent to the driver circuit 13 is different from that of the pressure sensor 12 distant from the driver circuit 13. Therefore, the embodiment of the present invention provides at least one of the first power signal line 16, the second power signal line 17, the first sensing signal line 18 and the second sensing signal line 19 of each pressure sensor 12 to include the electrically connected first sub-signal connection line 21 and the electrically connected second sub-signal connection line 22. In fig. 2, the first sensing signal line 18 is illustrated as including a first sub-signal connection line 21 and a second sub-signal connection line 22 electrically connected to each other. Referring to fig. 2, the extending direction of the first sub-signal connection line 21 is parallel to the extending direction of the data line (X direction in fig. 2); the extending direction of the second sub-signal connection lines 22 is parallel to the extending direction of the scan lines (Y direction in fig. 2). The first sub-signal connection line 21 is connected to a corresponding interface of the driving circuit 13, and the second sub-signal connection line 22 is connected to the first output terminal 121 of the pressure sensor 12. The first sub-signal connection line 21 includes a plurality of conductive leads 211 connected in parallel. The distance between each pressure sensor 12 and the driving circuit 13 gradually increases along the X direction in fig. 2, and if the first sub signal connection line 21 in the first sensing signal line 18 between each pressure sensor 12 and the driving circuit 13 includes only one conductive lead 211, the signal transmission loss > of the first pressure sensor 12 is larger than the signal transmission loss > of the second pressure sensor 12 is larger than the signal transmission loss > of the third pressure sensor 12 along the X direction in fig. 2. Therefore, the embodiment of the present invention adjusts the signal transmission loss of each pressure sensor 12 by setting the number of the conductive leads 211 connected in parallel in the first sub-signal connection line 21 corresponding to the pressure sensor 12 to gradually increase as the distance between the pressure sensor 12 and the driving circuit 13 increases. Illustratively, referring to fig. 2, the first sub-signal connection line 21 of the first pressure sensor 12 includes 4 parallel conductive leads 211, which are the 1 st, 4 th, 6 th and 9 th conductive leads 211 from left to right, respectively, along the X direction in fig. 2. Along the X direction in fig. 2, the first sub-signal connection line 21 of the second pressure sensor 12 includes 3 parallel conductive leads 211, which are respectively the 2 nd, 5 th and 8 th conductive leads 211 from left to right. Along the X direction in fig. 2, the first sub-signal connection line 21 of the third pressure sensor 12 includes 2 parallel conductive leads 211, which are respectively the 3 rd conductive lead 211 and the 7 th conductive lead 211 from left to right. The dashed circles in fig. 2 indicate that the second sub-signal connection lines 22 are electrically connected to the conductive leads 211. That is, as the distance between the pressure sensors 12 and the driving circuit 13 increases, the number of the conductive leads 211 connected in parallel in the first sub-signal connection line 21 of the first sensing signal line 18 of each pressure sensor 12 gradually increases. The greater the number of the conductive leads 211 connected in parallel, the smaller the resistance of the first sub-signal connection line 21, and thus the resistance of the first sub-signal connection line 21 having a longer length can be reduced by connecting a greater number of the conductive leads 211 in parallel. In general, the first sub-signal connection line 21 is longer than the second sub-signal connection line 22, and the voltage drop of the signal lines of the pressure sensor at different positions of the display panel is mainly caused by the difference of effective resistance due to the difference of the length of the first sub-signal connection line 21. By setting the way that the number of the conductive leads 211 connected in parallel in the first sub-signal connection line 21 corresponding to the pressure sensor 12 gradually increases as the distance between the pressure sensor 12 and the driving circuit 13 increases, the resistance difference of the first sensing signal line 18 of each pressure sensor 12 at different positions in the display panel is smaller than the first preset value. The first preset value may be determined according to a specific design requirement of the display panel. For example, the first preset value may be set to zero, i.e., the difference in resistance of the first sensing signal line 18 of each pressure sensor 12 at different positions in the display panel is equal to zero. The resistance of the first sensing signal line 18 of each pressure sensor 12 is equal to the sum of the effective resistance of the electrically connected first sub-signal connection line and the effective resistance of the second sub-signal connection line, and if the effective resistance of the second sub-signal connection line 22 of the first sensing signal line 18 of each pressure sensor 12 is equal, the effective resistance of the first sub-signal connection line 21 of the first sensing signal line 18 of each pressure sensor 12 is also equal.

It should be noted that, in the exemplary arrangement shown in fig. 2 along the X direction in fig. 2, the first sub-signal connection line 21 of the first pressure sensor 12 includes 4 parallel conductive leads 211, the first sub-signal connection line 21 of the second pressure sensor 12 includes 3 parallel conductive leads 211, and the first sub-signal connection line 21 of the third pressure sensor 12 includes 2 parallel conductive leads 211, and in display panels with different sizes and design requirements, the number of parallel conductive leads 211 in the first sub-signal connection line 21 of each pressure sensor 12 is generally related to the distance between the pressure sensor 12 and the driving circuit 13.

In fig. 1, 3 pressure sensors are exemplarily disposed in two non-display areas opposite to each other in the display area, but the embodiment of the present invention is not limited thereto. The embodiment of the invention does not limit the number of the pressure sensors in the display panel, and each pressure sensor can be positioned in the non-display area at the same side of the display area, can be distributed in two opposite non-display areas of the display area, and can be provided with the pressure sensors in the non-display areas at the periphery of the display area.

On the basis of the above embodiment, optionally, if the display panel includes n pressure sensors;

the number of the conductive leads connected in parallel in the first sub-signal connecting line corresponding to the ith pressure sensor and the jth pressure sensor meets the following condition:

wherein D is_iThe distance between the ith pressure sensor and the driving circuit; d_jThe distance between the jth pressure sensor and the driving circuit; m is_iThe number of the conductive leads connected in parallel in the first sub-signal connecting line corresponding to the ith pressure sensor is the number of the conductive leads connected in parallel in the first sub-signal connecting line corresponding to the ith pressure sensor; m is_jThe number of the conductive leads connected in parallel in the first sub-signal connecting line corresponding to the jth pressure sensor is the number of the conductive leads connected in parallel in the first sub-signal connecting line corresponding to the jth pressure sensor; i and j are positive integers which are more than or equal to 1 and less than or equal to n, and i is not equal to j.

The resistance of the conductive leads is formulated as

Where ρ is₀Is the resistivity of the conductive leads, /)₀Is the effective length of the conductive lead (the effective length of the conductive lead refers to the length of the conductive lead between the position of the node where the second sub-signal connecting line is electrically connected with the conductive lead and the corresponding interface of the conductive lead and the driving circuit), S₀Is the cross-sectional area of the conductive lead. The number of the parallel conductive leads in the first sub-signal connecting line corresponding to the ith pressure sensor is m_i(ii) a The distance between the ith pressure sensor and the drive circuit is D_iEffective length l of conductive lead in first sub-signal connection line corresponding to ith pressure sensor_0i≈D_i(ii) a Therefore, the effective resistance of the first sub-signal connection line corresponding to the ith pressure sensor is

Similarly, the effective resistance of the first sub-signal connecting line corresponding to the jth pressure sensor is

The embodiment of the invention sets the effective resistance of the first sub-signal connecting line corresponding to the ith pressure sensor to be equal to the effective resistance of the first sub-signal connecting line corresponding to the jth pressure sensor,

namely, it is

When any two pressure sensors in the n pressure sensors satisfy the above formula, the effective resistances of the corresponding first sub-signal connection lines of any two pressure sensors are equal, and if the effective resistance of the second signal connection line is ignored, the resistances of the signal lines (the first power signal line 16, the second power signal line 17, the first sensing signal line 18, and the second sensing signal line 19) including the electrically connected first sub-signal connection line and the electrically connected second sub-signal connection line in any two pressure sensors are equal, so that the signal transmission of each pressure sensor on the signal line is equalThe losses are equal, and the consistency of the pressure detection sensitivity of each pressure sensor and the accuracy of pressure detection of the display panel are improved.

Fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and as shown in fig. 3, 8 pressure sensors 12 are disposed in a non-display area of the display panel. The non-display area of the display panel includes a first non-display area 31, a second non-display area 32, a third non-display area 33, and a fourth non-display area 34. Wherein the first non-display area 31 and the second non-display area 32 are respectively located at opposite sides of the display area 10, and the third non-display area 33 and the fourth non-display area 34 are respectively located at opposite sides of the display area 10. The driving circuit 13 is located in the first non-display area 31, the 4 pressure sensors 12 are located in the third non-display area 33, and the 4 pressure sensors 12 are located in the fourth non-display area 34. The 4 pressure sensors 12 located in the third non-display area 33 are sequentially labeled as a first pressure sensor, a second pressure sensor, a third pressure sensor, and a fourth pressure sensor in a distance from the driving circuit 13 from far to near; the 4 pressure sensors 12 located in the fourth non-display area 34 are labeled as a fifth pressure sensor, a sixth pressure sensor, a seventh pressure sensor, and an eighth pressure sensor in this order. Wherein, the distances between the first pressure sensor and the driving chip 13 are the same as the distances between the fifth pressure sensor and the driving chip 13

The distances between the second pressure sensor and the driving chip 13 are all the same as the distances between the sixth pressure sensor and the driving chip 13

The distances between the third pressure sensor and the seventh pressure sensor and the driving chip 13 are all

The distances between the fourth pressure sensor and the drive chip 13 are all the same as the distances between the eighth pressure sensor and the drive chip 13

Then the number of electrically conductive leads of the signal lines (the first power signal line, the second power signal line, the first sensing signal line, and the second sensing signal line) corresponding to the first pressure sensor, the second pressure sensor, the third pressure sensor, and the fourth pressure sensor, which include the electrically connected first sub-signal connection line and the electrically connected second sub-signal connection line, in parallel with the first sub-signal connection line, satisfies:

the number of the conductive leads connected in parallel with the first sub-signal connecting lines in the signal lines (the first power signal line, the second power signal line, the first induction signal line and the second induction signal line) comprising the electrically connected first sub-signal connecting lines and second sub-signal connecting lines corresponding to the fifth pressure sensor, the sixth pressure sensor, the seventh pressure sensor and the eighth pressure sensor satisfies that:

wherein m is₁The number of the conductive leads connected in parallel to the first sub-signal connection line in the signal lines (the first power supply signal line, the second power supply signal line, the first sensing signal line, and the second sensing signal line) including the first sub-signal connection line and the second sub-signal connection line electrically connected corresponding to the first pressure sensor; m is₂The number of the conductive leads connected in parallel to the first sub-signal connection line in the signal lines (the first power supply signal line, the second power supply signal line, the first sensing signal line, and the second sensing signal line) including the first sub-signal connection line and the second sub-signal connection line electrically connected corresponding to the second pressure sensor; m is₃The number of the conductive leads connected in parallel to the first sub-signal connection line in the signal lines (the first power supply signal line, the second power supply signal line, the first sensing signal line, and the second sensing signal line) including the first sub-signal connection line and the second sub-signal connection line electrically connected corresponding to the third pressure sensor; m is₄A first sub-letter including an electrical connection corresponding to the fourth pressure sensorThe number of the conductive leads connected in parallel with the first sub-signal connection line in the signal lines (the first power supply signal line, the second power supply signal line, the first sensing signal line and the second sensing signal line) of the signal connection line and the second sub-signal connection line; m is₅The number of the conductive leads connected in parallel to the first sub-signal connection line in the signal lines (the first power supply signal line, the second power supply signal line, the first sensing signal line, and the second sensing signal line) including the first sub-signal connection line and the second sub-signal connection line electrically connected corresponding to the fifth pressure sensor; m is₆The number of the conductive leads connected in parallel to the first sub-signal connection line in the signal lines (the first power supply signal line, the second power supply signal line, the first sensing signal line, and the second sensing signal line) including the first sub-signal connection line and the second sub-signal connection line electrically connected corresponding to the sixth pressure sensor; m is₇The number of the conductive leads connected in parallel to the first sub-signal connection line in the signal lines (the first power supply signal line, the second power supply signal line, the first sensing signal line, and the second sensing signal line) including the first sub-signal connection line and the second sub-signal connection line electrically connected corresponding to the seventh pressure sensor; m is₈The number of the conductive leads connected in parallel to the first sub-signal connection line among the signal lines (the first power supply signal line, the second power supply signal line, the first sensing signal line, and the second sensing signal line) including the electrically connected first sub-signal connection line and the electrically connected second sub-signal connection line corresponding to the eighth pressure sensor.

Fig. 4 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention, as shown in fig. 4. The display area 10 is provided with a plurality of self-contained touch position detection electrodes 41, a plurality of touch position traces 42 and a plurality of virtual touch position traces 43; each self-contained touch position detection electrode 41 is electrically connected to at least one touch position trace 42. The plurality of virtual touch position traces 43 and the plurality of touch position traces 42 are insulated and arranged in parallel. The plurality of virtual touch position traces 43 are not electrically connected to the self-contained touch position detection electrodes 41. The touch position detection electrodes 41 generally form a capacitance, when a touch object touches any one of the touch position detection electrodes 41, the capacitance between the touch position detection electrode 41 and the ground changes, and the driving circuit 13 of the display panel can obtain a signal value on the touch position detection electrode 41 through the touch position trace 42 electrically connected to the touch position detection electrode 41, so as to determine that the touch position detection electrode 41 is located at the touch position of the touch object. Referring to fig. 4, a plurality of data lines 14 and a plurality of scan lines 15 of the display panel are insulated and crossed to define a plurality of pixel units 50. Each self-contained touch position detection electrode 41 may cover a plurality of pixel units 50. The data lines in fig. 4 are shielded by the touch position traces 42 and the virtual touch position traces 43, and thus are not shown in fig. 4. The number of pixel units 50 covered by each self-contained touch position detection electrode 41 can be specifically adjusted according to the touch accuracy requirement of the display panel. In order to prevent the touch position trace 42 from affecting the aperture ratio of the pixel units 50, the touch position trace 42 is generally disposed between adjacent rows of the pixel units 50, and the touch position trace 42 is located right above the data line, so that the black matrix above the data line can also shield the touch position trace 42. For example, as shown in fig. 4, some adjacent rows of pixel units 50 have touch position traces 42 disposed therebetween, some adjacent rows of pixel units 50 have no touch position traces 42 disposed therebetween, and the electric field and transmittance at the locations where the touch position traces 42 are disposed are slightly different from those at the locations where the touch position traces 42 are not disposed, so that in order to improve the display uniformity, the virtual touch position traces 43 are disposed between the adjacent rows of pixel units 50 where the touch position traces 42 are not disposed, and the virtual touch position traces 43 are not electrically connected to the self-contained touch position detection electrodes 41. The touch position trace 42 and the virtual touch position trace 43 are parallel to the data lines and overlapped in insulation. In the embodiment of the invention, at least a part of the plurality of virtual touch position traces 43 are arranged to be reused as the conductive leads 211 connected in parallel in the first sub-signal connection line 21. Fig. 4 may provide that at least one of the first power signal line 16, the second power signal line 17, the first sensing signal line 18 and the second sensing signal line 19 of each pressure sensor 12 includes the electrically connected first sub-signal connection line 21 and the electrically connected second sub-signal connection line 22, and the plurality of virtual touch position traces 43 are multiplexed as the electrically conductive leads 211 connected in parallel in the first sub-signal connection line 21.

It should be noted that, in order to clearly show the touch position traces 42 and the virtual touch position traces 43 in the drawings, the touch position traces 42 are shown in bold in the drawings corresponding to the embodiments of the present invention, black filled circles in the drawings indicate that the touch position traces 42 are electrically connected to the corresponding touch position detection electrodes 41, and dashed circles indicate that the second sub-signal connection lines 22 are electrically connected to the conductive leads 211.

According to the embodiment of the invention, at least part of the virtual touch position routing in the display area is multiplexed into the conductive leads connected in parallel in the first sub-signal connecting line, so that excessive signal lines can be prevented from being arranged in the non-display area, and the frame of the display panel is effectively reduced.

Optionally, the length of the second sub-signal connection line corresponding to the pressure sensor may be gradually decreased as the distance between the pressure sensor and the driving circuit increases. Fig. 5 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention. As shown in fig. 5, the length of the second sub-signal line 22 connected to the first sub-signal connection line 21 having a long length can be reduced so that the effective resistance increases as the distance between the pressure sensor 12 and the drive circuit 13 increases and the difference between the sum of the effective resistance of the first sub-signal connection line 21 and the effective resistance of the second sub-signal connection line 22 of each pressure sensor 12 decreases. That is, the longer the length of the first sub-signal connection line 21 corresponding to the pressure sensor 12 is, the shorter the length of the second sub-signal connection line 22 connected to the first sub-signal connection line 21 is, so that the difference in resistance of at least one of the first power signal line 16, the second power signal line 17, the first sensing signal line 18, or the second sensing signal line 19, which includes the electrically connected first sub-signal connection line 21 and the electrically connected second sub-signal connection line 22, in any two pressure sensors is smaller than the first preset value. Referring to fig. 5, 3 pressure sensors are exemplarily provided, and are labeled as a first pressure sensor, a second pressure sensor, and a third pressure sensor in order from a far distance to a near distance from the driving circuit 13. The length D of the first sub-signal connecting line corresponding to the first pressure sensor₁First sub-signal corresponding to second pressure sensorLength D of the connecting wire₂Length D of first sub-signal connecting line corresponding to third pressure sensor₃. The length L of the second sub-signal connecting line corresponding to the first pressure sensor₁<The length L of the second sub-signal connecting line corresponding to the second pressure sensor₂<The length L of the second sub-signal connecting line corresponding to the third pressure sensor₃。

On the basis of the above embodiment, optionally, the display panel includes n pressure sensors;

the first sub-signal connecting line and the second sub-signal connecting line corresponding to the ith pressure sensor and the jth pressure sensor meet the following conditions:

wherein D is_iThe distance between the ith pressure sensor and the driving circuit; d_jThe distance between the jth pressure sensor and the driving circuit; rho₁Is the resistivity, rho, of the first sub-signal connection line₂The resistivity of the second sub-signal connecting line; s₁The cross section area of the first sub-signal connecting line; s₂The sectional area of the second sub-signal connecting line; l is_iThe length of a second sub-signal connecting line corresponding to the ith pressure sensor; l is_jThe length of the second sub-signal connecting line corresponding to the jth pressure sensor.

The effective resistance of the first sub-signal connection line corresponding to the ith pressure sensor,

the effective resistance of the second sub-signal connecting line corresponding to the ith pressure sensor,

the effective resistance of the first sub-signal connection line corresponding to the jth pressure sensor,

the effective resistance of the second sub-signal connecting line corresponding to the jth pressure sensor. Formula (II)

The sum of the effective resistance of the first sub-signal connecting line and the effective resistance of the second sub-signal connecting line corresponding to the ith pressure sensor is equal to the sum of the effective resistance of the first sub-signal connecting line and the effective resistance of the second sub-signal connecting line corresponding to the jth pressure sensor, namely, the resistances of at least one of the first power signal line, the second power signal line, the first sensing signal line and the second sensing signal line, including the first sub-signal connecting line and the second sub-signal connecting line which are electrically connected, of the ith pressure sensor and the jth pressure sensor are equal.

With continued reference to fig. 5, along the extending direction of the data line, the first pressure sensor, the second pressure sensor, and the third pressure sensor are sequentially marked as a first pressure sensor, a second pressure sensor, and a third pressure sensor according to the distance from the driving circuit 13 to the driving circuit 13, and then the first sub-signal connection line 21 and the second sub-signal connection line 22 corresponding to the first pressure sensor, the second pressure sensor, and the third pressure sensor satisfy:

wherein, the distance between the first pressure sensor and the driving chip 13 is D₁The distance between the second pressure sensor and the driving chip 13 is D₂The distance between the third pressure sensor and the driving chip 13 is D₃，L₁The length L of the second sub-signal connecting line corresponding to the first pressure sensor₂The length, L, of the second sub-signal connecting line corresponding to the second pressure sensor₃₁The length of the second sub-signal connecting line corresponding to the third pressure sensor. Formula (II)

Corresponding to the first sub-letter corresponding to any two pressure sensors in the display panelThe sum of the effective resistance of the signal connecting line and the effective resistance of the second sub-signal connecting line is equal.

Alternatively, if the first power signal line and/or the second power signal line includes a first sub-signal connection line and a second sub-signal connection line that are electrically connected; the first sub-signal connecting wires of the first power supply signal wires of the pressure sensors positioned on the same side of the display area are electrically connected with one end of the driving circuit; or the first sub-signal connection line of the second power signal line of each pressure sensor located on the same side of the display area is electrically connected to one end adjacent to the driving circuit. Referring to fig. 6, a total of 4 pressure sensors 12 are provided, with 4 pressure sensors 12 being located on the same side of the display area 10. The first power signal line 16 and the second power signal line 17 of each pressure sensor 12 each include a first sub-signal connection line 21 and a second sub-signal connection line 22 that are electrically connected. The first sub-signal connection lines 21 of the first power signal lines 16 of the respective pressure sensors 12 located on the same side of the display area 10 are electrically connected adjacent to one end of the driver circuit 13, and the first sub-signal connection lines 21 of the second power signal lines 17 of the respective pressure sensors 12 located on the same side of the display area 10 are electrically connected adjacent to one end of the driver circuit 13. With this arrangement, the first sub-signal connection lines 21 of the first power signal lines 16 of the respective pressure sensors 12 are electrically connected and then connected to the driver circuit 13 via the same interface, and the first sub-signal connection lines 21 of the second power signal lines 17 of the respective pressure sensors 12 are electrically connected and then connected to the driver circuit 13 via the same interface, so that the number of interfaces of the driver circuit 13 can be reduced, and the cost can be reduced.

In other embodiments, optionally, the first sensing signal line and/or the second sensing signal line may be further configured to include a first sub-signal connection line and a second sub-signal connection line electrically connected to each other.

On the basis of the foregoing embodiments, optionally, a film layer in which the first sensing signal line and the second sensing signal line are located and a film layer in which the first power signal line and the second power signal line are located may be further provided, which are located in different layers, and a vertical projection of the first sensing signal line on the substrate and a vertical projection of the first power signal line on the substrate at least partially overlap; a vertical projection of the second sensing signal line on the substrate at least partially overlaps a vertical projection of the second power signal line on the substrate. That is, the areas where the first sensing signal line and the second sensing signal line are located are partially overlapped with the areas where the first power signal line and the second power signal line are located. For example, a vertical projection of the first sensing signal line on the substrate may be set to completely overlap a vertical projection of the first power signal line on the substrate, and a vertical projection of the second sensing signal line on the substrate may be set to completely overlap a vertical projection of the second power signal line on the substrate. Therefore, the occupied space of signal wire routing in the non-display area can be reduced, and the frame is further reduced.

Optionally, if the display area of the display panel provided in the embodiment of the present invention is provided with a plurality of self-contained touch position detection electrodes and a plurality of touch position routing lines; each self-contained touch position detection electrode is electrically connected with at least one touch position wiring. The first sensing signal line and/or the second sensing signal line are arranged to include a first sub-signal connection line and a second sub-signal connection line which are electrically connected. Then, the first sub-signal connection lines in the first sensing signal lines and/or the second sensing signal lines and the plurality of touch position routing lines can be arranged on the same layer; the second sub-signal connecting lines in the first sensing signal lines and/or the second sensing signal lines are arranged on the same layer with the scanning lines. Fig. 7 is a partial schematic structural diagram of another display panel according to an embodiment of the invention, and fig. 8 is a cross-sectional view along the direction AA' in fig. 7. As shown in fig. 7 and 8, the display area 10 is provided with a plurality of self-contained touch position detection electrodes 41 and a plurality of touch position traces 42; each self-capacitance touch position detection electrode 41 is electrically connected to at least one touch position trace 42 (fig. 7 exemplarily shows that each self-capacitance touch position detection electrode 41 is electrically connected to one touch position trace 42). The first sensing signal line 18 and the second sensing signal line 19 are arranged to include a first sub-signal connection line 21 and a second sub-signal connection line 22 electrically connected. The first sub-signal connection line 21 of the first sensing signal line 18 and the second sensing signal line 19 and the plurality of touch position traces 42 can be disposed at the same layer; the second sub-signal connection lines 22 in the first sensing signal lines 18 and the second sensing signal lines 19 are disposed at the same layer as the scan lines 15. The first sub-signal connecting lines 21 and the plurality of touch position wires 42 in the first sensing signal lines 18 and the second sensing signal lines 19 are located on the same layer, only one etching process is needed in the manufacturing process, and no mask plate needs to be manufactured on the first sub-signal connecting lines 21 and the touch position wires 42 respectively, so that the cost is saved, the number of manufacturing processes is reduced, and the production efficiency is improved. Similarly, the second sub-signal connection line 22 and the scanning line 15 are arranged on the same layer, only one etching process is needed in the manufacturing process, and no mask plate needs to be manufactured on the second sub-signal connection line 22 and the scanning line 15 respectively, so that the cost is saved, the number of manufacturing processes is reduced, and the production efficiency is improved. An insulating layer is arranged between the first sub-signal connecting line 21 and the second sub-signal connecting line 22, and the first sub-signal connecting line and the second sub-signal connecting line are connected through a via hole penetrating through the insulating layer, so that the wiring space can be saved.

Optionally, if the display area of the display panel provided in the embodiment of the present invention is provided with a plurality of mutual capacitance type touch position detection driving electrodes and a plurality of mutual capacitance type touch position detection sensing electrodes; the non-display area is provided with a plurality of touch position driving wires and a plurality of touch position sensing wires; each touch position driving wire is electrically connected with a corresponding mutual capacitance type touch position detection driving electrode, and each touch position sensing wire is electrically connected with a corresponding mutual capacitance type touch position detection sensing electrode. At least part of the plurality of touch position driving wires or at least part of the plurality of touch position sensing wires are multiplexed into the first sub-signal connecting wires in the first sensing signal wires and/or the second sensing signal wires. The second sub-signal connecting lines in the first sensing signal lines and/or the second sensing signal lines are arranged on the same layer with the scanning lines. Fig. 9 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention. Fig. 10 is a cross-sectional view taken along the direction BB' in fig. 9. As shown in fig. 9 and 10, the display area 10 is provided with a plurality of mutually-capacitive touch position detection driving electrodes 51 and a plurality of mutually-capacitive touch position detection sensing electrodes 52; the non-display area 20 is provided with a plurality of touch position driving traces 53 and a plurality of touch position sensing traces 54; each touch position driving trace 53 is electrically connected to a corresponding mutual capacitance type touch position detection driving electrode 51, and each touch position sensing trace 54 is electrically connected to a corresponding mutual capacitance type touch position detection sensing electrode 52. Fig. 9 exemplarily shows that a part of the plurality of touch position sensing traces 54 is multiplexed as the first sub-signal connection lines 21 in the first sensing signal lines 18. The second sub-signal connection lines 22 in the first sensing signal lines 18 are disposed on the same layer as the scan lines 15.

Optionally, if the display area of the display panel provided in the embodiment of the present invention is provided with a plurality of mutual capacitance type touch position detection driving electrodes and a plurality of mutual capacitance type touch position detection sensing electrodes; the non-display area is provided with a plurality of touch position driving wires and a plurality of touch position sensing wires; each touch position driving wire is electrically connected with a corresponding mutual capacitance type touch position detection driving electrode, and each touch position sensing wire is electrically connected with a corresponding mutual capacitance type touch position detection sensing electrode; the first sub-signal connecting line in the first sensing signal line and/or the second sensing signal line and the plurality of touch position driving wires or the plurality of touch position sensing wires are positioned on the same layer; the second sub-signal connecting lines in the first sensing signal lines and/or the second sensing signal lines are arranged on the same layer as the scanning lines. Fig. 11 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention. Fig. 12 is a cross-sectional view taken along direction CC' in fig. 11. As shown in fig. 11 and 12, the display area 10 is provided with a plurality of mutually-capacitive touch position detection driving electrodes 51 and a plurality of mutually-capacitive touch position detection sensing electrodes 52; the non-display area 20 is provided with a plurality of touch position driving traces 53 and a plurality of touch position sensing traces 54; each touch position driving trace 53 is electrically connected to a corresponding mutual capacitance type touch position detection driving electrode 51, and each touch position sensing trace 54 is electrically connected to a corresponding mutual capacitance type touch position detection sensing electrode 52. Fig. 11 exemplarily shows that the first sub-signal connection lines 21 in the first sensing signal lines 18 and the second sensing signal lines 19 are disposed at the same layer as the plurality of touch position driving traces 53; the second sub-signal connection lines 22 in the first sensing signal lines 18 and the second sensing signal lines 19 are disposed at the same layer as the scan lines 15. It should be noted that the exemplary configuration of the plurality of touch position driving traces 53 and the plurality of touch position sensing traces 54 in fig. 9-12 are made by using separate metal film layers. In other embodiments, the plurality of touch position driving traces 53 or the plurality of touch position sensing traces 54 in fig. 9 to 12 may be disposed on the same layer as the scanning line 15, or the plurality of touch position driving traces 53 or the plurality of touch position sensing traces 54 may be disposed on the same layer as the data line 14, that is, the plurality of touch position driving traces 53 or the plurality of touch position sensing traces 54 are formed while the scanning line 15 or the data line 14 is manufactured, so that the process can be further saved. For example, the plurality of touch position driving traces 53 are disposed on the same layer as the data lines 14, and the plurality of touch position sensing traces 54 are disposed on the same layer as the scan lines. If the touch position driving traces 53 and the touch position sensing traces 54 in fig. 9-12 are on the same layer as the scan lines 15, the first sub-signal connecting lines 21 and the second sub-signal connecting lines 22 are on the same layer.

On the basis of the above embodiments, optionally, the second sub-signal connection line in the first sensing signal line and/or the second sensing signal line may also be electrically connected to the first sub-signal connection line through a connection pad, where the connection pad and the data line are located at the same layer. Taking the first sensing signal line as an example, fig. 13 is another cross-sectional view along the direction AA' in fig. 7. Referring to fig. 13, the second sub-signal connection line 22 in the first sensing signal line 18 is electrically connected to the first sub-signal connection line 21 through a connection pad 55, and the connection pad 55 and the data line 14 are located at the same layer. The arrangement can avoid the condition that the first sub-signal connecting line and the second sub-signal connecting line are connected unstably due to the fact that the film layer between the first sub-signal connecting line and the second sub-signal connecting line is too thick.

On the basis of the above embodiments, optionally, if the first sensing signal line and/or the second sensing signal line includes the first sub-signal connection line and the second sub-signal connection line that are electrically connected; as the distance between the pressure sensor and the driving circuit increases, the length of the second sub-signal connection line corresponding to the pressure sensor gradually decreases, and then the resistivity of the second sub-signal connection line may be set to be greater than the resistivity of the first sub-signal connection line. In general, the connection lines of the first sub-signal connection lines are longer than the connection lines of the second sub-signal connection lines, and the voltage drop difference of the signal lines of the pressure sensor at different positions of the display panel is mainly caused by the difference of effective resistances due to the difference of the lengths of the first sub-signal connection lines. The resistance of the wire is calculated by the formula

Wherein ρ is the resistivity of the wire, l is the length of the wire, and S is the cross-sectional area of the wire. According to the embodiment of the invention, the resistivity of the second sub-signal connecting line is set to be larger than that of the first sub-signal connecting line, namely, the first sub-signal connecting line is prepared by using a material with small resistivity, so that the resistance difference of the first sensing signal line and/or the second sensing signal line caused by the different lengths of the first sub-signal connecting lines of the pressure sensors at different positions of the display panel is reduced as much as possible. By using a material with a large resistivity to prepare the second sub-signal connection lines, the resistance difference of the first sensing signal lines and/or the second sensing signal lines caused by the length difference of the first sub-signal connection lines of the pressure sensors at different positions of the display panel can be solved by the smaller length difference of the second sub-signal connection lines. If the resistance values of the second sub-signal connection lines with the same size are obtained, the second sub-signal connection lines are made of materials with high resistivity, so that the wiring length of the second sub-signal connection lines can be reduced, and the wiring space of the second sub-signal connection lines can be saved.

It should be noted that the specific structure of the pressure sensor on the display panel may be various, and the pressure sensor in the embodiment of the present invention may use, for example, a semiconductor material or a metal material. The following description will be made of the structures of several typical pressure sensors, but the structures are not limited thereto.

Fig. 14 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention. Pressure sensor 12 includes a first output 121, a second output 122, a first input 123, and a second input 124. The first input terminal 123, the second input terminal 124, the first output terminal 121, and the second output terminal 122 are electrically connected to the driver circuit 13 via the first power signal line 16, the second power signal line 17, the first sense signal line 18, and the second sense signal line 19, respectively. As shown in FIG. 14, the pressure sensor 12 includes a first pressure-sensitive resistor R₁A second pressure sensitive resistor R₂A third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄. First pressure sensitive resistor R₁First ofTerminal a1 and second pressure-sensitive resistor R₂The first terminal a2 is the first input terminal 123 and is connected to the first power signal line 16. First pressure sensitive resistor R₁Second end b1 and fourth pressure-sensitive resistor R₄The first end a4 is the first output end 121 connected to the first sensing signal line 18, and the fourth pressure sensing resistor R₄Second end b4 and third pressure-sensitive resistor R₃A second terminal b3 as a second input terminal 124 connected to the second power signal line 17, and a third pressure sensitive resistor R₃First end a3 and second pressure-sensitive resistor R₂The second end b2 is a second output end 122 connected to the second sensing signal line 19.

The pressure sensor shown in FIG. 14 is constructed in a Wheatstone bridge configuration with a first pressure-sensitive resistor R₁A second pressure sensitive resistor R₂A third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄Four arms connected in a quadrilateral, called a bridge. A diagonal line of the quadrangle (a connecting line of the first output terminal 121 and the second output terminal 122) is connected with a galvanometer G, two poles of the galvanometer G are connected with the first sensing signal line 18 and the second sensing signal line 19, and a first input terminal 123 and a second input terminal 124 on the diagonal line of the quadrangle (a connecting line of the first input terminal 123 and the second input terminal 124) are respectively connected with the first power signal line 16 and the second power signal line 17. When there is a difference between the voltage supplied by the first power supply signal line 16 and the voltage supplied by the second power supply signal line 17, a current flows through each branch of the bridge circuit. First pressure sensitive resistor R₁A second pressure sensitive resistor R₂A third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄Resistance value of

When the potentials between the two points of the first output end 121 and the second output end 122 are equal, the current flowing through the galvanometer G is zero, the pointer of the galvanometer G indicates a zero scale, the bridge is in a balanced state, and the galvanometer G is called

The bridge balance condition. When the first pressure sensitive resistor R₁A second pressure sensitive resistor R₂Third pressureInductive resistor R₃And a fourth pressure sensitive resistor R₄When the resistance value does not satisfy the bridge balance condition, the potentials of the first output end 121 and the second output end 122 are not equal, the current flowing through the galvanometer G is not 0, the pointer of the galvanometer G deflects, and a corresponding signal value is output, so that the touch pressure value is determined.

Optionally, fig. 15 is a schematic structural diagram of another pressure sensor provided in the embodiment of the present invention. The display panel may include a first extending direction P1 and a second extending direction P2, the first extending direction P1 and the second extending direction P2 being arranged to cross. First pressure sensitive resistor R₁A component of an extension length from the first end a1 to the second end b1 in the first extension direction P1 may be greater than a component in the second extension direction P2, the second pressure sensitive resistor R₂A component of an extension length from the first end a2 to the second end b2 in the second extension direction P2 may be greater than a component in the first extension direction P1, and the third pressure sensitive resistor R₃A component of an extension length from the first end a3 to the second end b3 in the first extension direction P1 may be greater than a component in the second extension direction P2, and the fourth pressure sensitive resistor R₄A component of the extension length from the first end a4 to the second end b4 in the second extension direction P2 may be greater than a component in the first extension direction P1. Referring to fig. 15, the first pressure sensitive resistor R₁A second pressure sensitive resistor R₂A third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄Are arranged in a serpentine-like configuration.

The pressure-sensitive touch unit usually requires a first pressure-sensitive resistor R₁A second pressure sensitive resistor R₂A third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄The deformation experienced being different, e.g. the first pressure-sensitive resistor R₁And a third pressure sensitive resistor R₃Sense compression set, second pressure-sensitive resistor R₂And a fourth piezoresistive sense R₄Tensile deformation, therefore, referring to fig. 14, the first pressure-sensitive resistor R₁And a second pressure sensitive resistor R₂And a third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄Are spatially separated. However, when the local temperature changes, the first pressure sensitive resistor R is enabled₁The first stepTwo pressure sensitive resistor R₂A third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄In different temperature environments, the temperature is opposite to the first pressure-sensitive resistor R₁A second pressure sensitive resistor R₂A third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄The resistance value of the pressure-sensitive touch unit has different influences, and the accuracy of pressure detection of the pressure-sensitive touch unit is influenced. FIG. 15 provides a pressure sensitive touch unit with a first pressure sensitive resistor R₁And a third pressure sensitive resistor R₃Sensing strain along the first extension direction P1, and a second pressure-sensitive resistor R₂And a fourth piezoresistive sense R₄Strain in the second direction of extension P2 is sensed. Due to the first pressure-sensitive resistor R₁Sense the direction of strain and the second pressure-sensitive resistor R₂The directions of the induced strains are different, and a fourth pressure-sensitive resistor R₄Sense the direction of strain and the third pressure-sensitive resistor R₃The first pressure-sensitive resistor R can be used for inducing different strain directions₁A second pressure sensitive resistor R₂And a third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄Distributed at the same position or at close distance in space, so that the first pressure-sensitive resistor R₁And a second pressure sensitive resistor R₂And a third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄The synchronous temperature change is realized, the influence of temperature difference is eliminated, and the pressure induction precision is improved. The first extending direction P1 in fig. 15 may be, for example, parallel to the scan line direction of the display panel and the second extending direction P2 parallel to the data line direction of the display panel, or the first extending direction P1 may be, for example, parallel to the data line direction of the display panel and the second extending direction P2 parallel to the scan line direction of the display panel.

First pressure-sensitive resistor R in FIGS. 14 and 15₁A second pressure sensitive resistor R₂A third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄The pressure sensor can be made of semiconductor materials such as amorphous silicon, polycrystalline silicon, oxide semiconductor and the like, and can also be made of metal materials, and pressure detection is carried out by utilizing the piezoresistive effect of the metal materials. If the first pressure sensitive resistor R₁A second pressure sensitive resistor R₂A third pressure sensitive resistor R₃And a firstFour-pressure-sensitive resistor R₄Made of metal material, the first pressure-sensitive resistor R is used for saving the process₁A second pressure sensitive resistor R₂A third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄The metal layer can be manufactured in the same layer with any metal layer in the original process of the display panel, such as a grid layer or a source drain layer of a thin film transistor of the display panel. If the first pressure sensitive resistor R₁A second pressure sensitive resistor R₂A third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄The semiconductor material can also be manufactured with the active layer of the thin film transistor of the display panel in the same layer.

Alternatively, the pressure sensor of the present invention may be a block shape having a polygonal shape including at least four sides. The pressure sensor comprises a first output 121, a second output 122, a first input 123 and a second input 124. The first input terminal 123, the second input terminal 124, the first output terminal 121, and the second output terminal 122 are electrically connected to the driver circuit 13 via the first power signal line 16, the second power signal line 17, the first sense signal line 18, and the second sense signal line 19, respectively. The first output end 121, the second output end 122, the first input end 123 and the second input end 124 are respectively disposed on four sides of the polygon, the side where the first output end 121 is located is not connected to the side where the second output end 122 is located, and the side where the first input end 123 is located is not connected to the side where the second input end 124 is located. For example, fig. 16 illustrates the pressure sensor as a square, but the shape of the pressure sensor is not limited in the embodiment of the present invention. Referring to fig. 16, the pressure sensor is a quadrilateral, the first output end 121, the second output end 122, the first input end 123 and the second input end 124 are respectively arranged on a first side, a second side, a third side and a fourth side of the pressure sensor, the first side and the second side of the pressure sensor are arranged oppositely, the third side and the fourth side of the pressure sensor are arranged oppositely, the first input end 123 is electrically connected with the first power signal line 16, the second input end 124 is electrically connected with the second power signal line 17, the first output end 121 is electrically connected with the first sensing signal line 18, and the second output end 122 is electrically connected with the second sensing signal line 19. The first power signal line 16 and the second power signal line 17 are for supplying power to the pressureThe sensor inputs a power driving signal; the first sensing signal line 18 and the second sensing signal line 19 are used for outputting a pressure detection signal from the pressure sensor. The pressure sensor shown in fig. 16 may be equivalent to the first pressure-sensitive resistor R in fig. 14₁A second pressure sensitive resistor R₂A third pressure sensitive resistor R₃And a fourth pressure sensitive resistor R₄The principle of the wheatstone bridge circuit for detecting pressure is the same as that of the pressure-sensitive touch unit shown in fig. 14, and the description thereof is omitted here. The pressure sensor shown in fig. 16 may be made of a semiconductor material, for example, amorphous silicon, polysilicon, an oxide semiconductor, or the like, and may be fabricated on the same layer as an active layer of a thin film transistor in a display panel.

Fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present invention, where the display device shown in fig. 17 includes: the above embodiment provides the display panel 400. It should be noted that the display device provided in the embodiments of the present invention may further include other circuits and devices for supporting normal operation of the display device, and the display device may be one of a mobile phone, a tablet computer, electronic paper, and an electronic photo frame.

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 including a display area and a non-display area surrounding the display area, comprising:

a substrate;

in any two pressure sensors, the difference value of the sum of the resistances of the first sub-signal connecting line and the second sub-signal connecting line which are electrically connected is smaller than a first preset value;

the first sub-signal connecting line comprises a plurality of conductive leads connected in parallel;

the number of the conductive leads connected in parallel in the first sub-signal connecting line corresponding to the pressure sensor is gradually increased along with the increase of the distance between the pressure sensor and the driving circuit;

the display area is provided with a plurality of self-contained touch position detection electrodes, a plurality of touch position routing lines and a plurality of virtual touch position routing lines; each self-contained touch position detection electrode is electrically connected with at least one touch position routing wire;

the plurality of virtual touch position wires and the plurality of touch position wires are insulated and arranged in parallel; at least part of the virtual touch position wires are multiplexed into the conductive leads connected in parallel in the first sub-signal connecting line.

2. The display panel according to claim 1, wherein the display panel comprises n pressure sensors;

wherein D is_iThe distance between the ith pressure sensor and the driving circuit; d_jThe distance between the jth pressure sensor and the driving circuit; m is_iThe number of the conductive leads which are connected in parallel in the first sub-signal connecting line corresponding to the ith pressure sensor is the number of the conductive leads which are connected in parallel in the first sub-signal connecting line corresponding to the ith pressure sensor; m is_jThe number of the conductive leads which are connected in parallel in the first sub-signal connecting line corresponding to the jth pressure sensor is the number of the conductive leads which are connected in parallel in the first sub-signal connecting line; i and j are positive integers which are more than or equal to 1 and less than or equal to n, and i is not equal to j.

3. The display panel according to claim 1, wherein the length of the second sub-signal connection line corresponding to the pressure sensor gradually decreases as the distance between the pressure sensor and the driving circuit increases.

4. The display panel according to claim 3, wherein the display panel comprises n pressure sensors;

wherein D is_iThe distance between the ith pressure sensor and the driving circuit; d_jThe distance between the jth pressure sensor and the driving circuit; rho₁Is the resistivity, rho, of the first sub-signal connection line₂The resistivity of the second sub-signal connecting line; s₁The cross section area of the first sub signal connecting line; s₂The cross section area of the second sub-signal connecting line; l is_iThe length of the second sub-signal connecting line corresponding to the ith pressure sensor is; l is_jThe length of the second sub-signal connecting line corresponding to the jth pressure sensor.

5. The display panel according to claim 3,

the first power signal line and/or the second power signal line comprise electrically connected first sub-signal connection lines and second sub-signal connection lines; the first sub-signal connection line of the first power signal line of each of the pressure sensors located on the same side of the display area is electrically connected to an end adjacent to the driving circuit; or the first sub-signal connection line of the second power signal line of each of the pressure sensors located on the same side of the display area is electrically connected adjacent to one end of the driving circuit.

6. The display panel according to claim 3, wherein the first sensing signal line and/or the second sensing signal line comprises a first sub signal connection line and a second sub signal connection line which are electrically connected.

7. The display panel according to claim 6, wherein a film layer in which the first and second sensing signal lines are located and a film layer in which the first and second power signal lines are located at different layers, and a vertical projection of the first sensing signal line on the substrate at least partially overlaps a vertical projection of the first power signal line on the substrate; a vertical projection of the second sense signal line on the substrate at least partially overlaps a vertical projection of the second power signal line on the substrate.

8. The display panel according to claim 6, wherein the display area is provided with a plurality of self-contained touch position detection electrodes and a plurality of touch position traces; each self-contained touch position detection electrode is electrically connected with at least one touch position routing wire;

the first sub-signal connecting lines in the first sensing signal lines and/or the second sensing signal lines and the plurality of touch position routing lines are positioned on the same layer;

the second sub-signal connecting line in the first sensing signal line and/or the second sensing signal line is arranged on the same layer as the scanning line.

9. The display panel according to claim 6, wherein the display area is provided with a plurality of mutually capacitive touch position detection driving electrodes and a plurality of mutually capacitive touch position detection sensing electrodes;

the non-display area is provided with a plurality of touch position driving wires and a plurality of touch position sensing wires; each touch position driving wire is electrically connected with a corresponding mutual capacitance type touch position detection driving electrode, and each touch position sensing wire is electrically connected with a corresponding mutual capacitance type touch position detection sensing electrode;

multiplexing at least a part of the plurality of touch position driving wires or at least a part of the plurality of touch position sensing wires into the first sub-signal connecting wires in the first sensing signal wires and/or the second sensing signal wires;

10. The display panel according to claim 6, wherein the display area is provided with a plurality of mutually capacitive touch position detection driving electrodes and a plurality of mutually capacitive touch position detection sensing electrodes;

the first sub-signal connecting line in the first sensing signal line and/or the second sensing signal line is positioned on the same layer as the plurality of touch position driving wires or the plurality of touch position sensing wires;

11. The display panel according to any one of claims 6 to 10, wherein the second sub-signal connection line of the first sensing signal line and/or the second sensing signal line is electrically connected to the first sub-signal connection line through a connection pad; the connection pads are located at the same layer as the data lines.

12. A display panel as claimed in any one of claims 6 to 10 wherein the resistivity of the second sub-signal connection lines is greater than the resistivity of the first sub-signal connection lines.

13. The display panel according to claim 1, wherein the pressure sensor includes a first pressure-sensitive resistor, a second pressure-sensitive resistor, a third pressure-sensitive resistor, and a fourth pressure-sensitive resistor;

the first end of the first pressure sensing resistor and the first end of the second pressure sensing resistor are connected with the first power signal line, the second end of the first pressure sensing resistor and the first end of the fourth pressure sensing resistor are connected with the first sensing signal line, the second end of the fourth pressure sensing resistor and the second end of the third pressure sensing resistor are connected with the second power signal line, and the first end of the third pressure sensing resistor and the second end of the second pressure sensing resistor are connected with the second sensing signal line.

14. The display panel according to claim 13, wherein a component of an extension length of the first pressure-sensitive resistor from the first end to the second end in a first extending direction is larger than a component in a second extending direction, a component of an extension length of the second pressure-sensitive resistor from the first end to the second end in the second extending direction is larger than a component in the first extending direction, a component of an extension length of the third pressure-sensitive resistor from the first end to the second end in the first extending direction is larger than a component in the second extending direction, and a component of an extension length of the fourth pressure-sensitive resistor from the first end to the second end in the second extending direction is larger than a component in the first extending direction;

the first extending direction and the second extending direction are arranged crosswise.

15. The display panel according to claim 1, wherein the pressure sensor is a block shape having a polygonal shape including at least four sides;

the first input end, the second input end, the first output end and the second output end are respectively arranged on four edges of the polygon, the edge where the first input end is located is not connected with the edge where the second input end is located, and the edge where the first output end is located is not connected with the edge where the second output end is located.

16. The display panel according to claim 1, wherein the pressure sensor is made of a semiconductor material or a metal material.

17. A display device characterized by comprising the display panel according to any one of claims 1 to 16.