CN111580702A

CN111580702A - Display panel and display device

Info

Publication number: CN111580702A
Application number: CN202010488334.3A
Authority: CN
Inventors: 王丽花; 马从华; 孙晓平; 东强
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2020-08-25
Anticipated expiration: 2040-06-02
Also published as: CN111580702B

Abstract

The invention discloses a display panel and a display device, which relate to the technical field of display and comprise light-emitting elements arranged in an array and a driving transistor electrically connected with the light-emitting elements; the display panel further comprises a substrate base plate, a first electrode layer and a second electrode layer which are insulated from each other, the first electrode layer and the second electrode layer are positioned on at least one side of the substrate base plate along a direction perpendicular to the substrate base plate, the first electrode layer comprises a first power line, and the second electrode layer comprises a second power line; the first electrode of the light-emitting element is electrically connected with a first power line; the second pole of the light-emitting element is electrically connected with the first pole of the driving transistor and used for receiving a data signal; the second pole of the driving transistor is electrically connected with a second power line; the control end of the driving transistor is electrically connected with the control signal line; the display panel further comprises a touch electrode which multiplexes the first power line and/or the second power line. Therefore, the film layer structure of the display panel is simplified, and the thickness of the display panel is reduced.

Description

Display panel and display device

Technical Field

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

Background

With the development of display technology, display panels integrated with touch control functions become a hot point and a mainstream technical trend of research. In recent years, touch screen technology has gradually become a mainstream technology of mobile terminals and the like instead of key technology. The touch screen technology is a technology in which when a finger, a pen, or the like touches a touch screen mounted on the front end of a display, the touched position is detected and sent to a CPU, thereby determining input information. At present, the application range of the touch screen is very wide, and the main products include touch mobile phones, notebook computers and other mobile terminals, and human-computer display interfaces in the industrial automation industry.

The touch screen can be divided into: an Add On Mode Touch Panel (Add On Touch Panel), an overlay surface Touch Panel (On Cell Touch Panel), and an In Cell Touch Panel (In Cell Touch Panel). Wherein, embedded touch-sensitive screen is the inside that sets up display panel with the touch-control electrode of touch-sensitive screen, compares outer hanging touch-sensitive screen and cover surface formula touch-sensitive screen, can attenuate the holistic thickness of module, the cost of manufacture that again can greatly reduced touch-sensitive screen. In the existing embedded touch screen, although the touch electrode is integrated inside the display panel, the film structure is complex, so that the thickness of the display panel is difficult to further reduce.

Disclosure of Invention

In view of this, the present invention provides a display panel and a display device, in which the touch electrode multiplexes the first power line and/or the second power line, which is beneficial to simplifying the film structure of the display panel and reducing the thickness of the display panel.

In a first aspect, the present application provides a display panel including light emitting elements arranged in an array and a driving transistor electrically connected to the light emitting elements; the display panel further comprises a substrate base plate, a first electrode layer and a second electrode layer which are insulated from each other, the first electrode layer and the second electrode layer are positioned on at least one side of the substrate base plate along a direction perpendicular to the substrate base plate, the first electrode layer comprises a first power line, and the second electrode layer comprises a second power line;

a first electrode of the light emitting element is electrically connected to the first power line; the second pole of the light-emitting element is electrically connected with the first pole of the driving transistor and used for receiving a data signal; a second pole of the driving transistor is electrically connected with the second power line; the control end of the driving transistor is electrically connected with the control signal line;

the display panel further comprises a touch electrode, and the touch electrode is used for multiplexing the first power line and/or the second power line.

In a second aspect, the present application further provides a display device including the display panel provided by the present application.

Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:

the display panel and the display device provided by the invention comprise a light-emitting element and a driving transistor connected with the light-emitting element, wherein the first pole of the light-emitting element is electrically connected with a first power line, and the second pole of the light-emitting element is electrically connected with the first pole of the driving transistor and used for receiving a data signal sent by the driving transistor; the second pole of the driving transistor is electrically connected with the second power line, the control end is electrically connected with the control signal line, and the control signal line is used for transmitting a control signal to the driving transistor and controlling the brightness of the light-emitting element through the control signal. Particularly, in the display panel provided by the application, the touch electrode multiplexes the first power line and/or the second power line, so that a new film structure is not required to be introduced into the display panel to set the touch electrode, and the existing film structure is multiplexed, so that the touch function of the display panel is realized, the film structure of the display panel is simplified, the thickness of the display panel is reduced, and the requirements for thinning the display panel and the display device are met.

Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a cross-sectional view of a prior art display panel;

fig. 2 is a top view of a display panel according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram illustrating electrical connections between a driving transistor and a light emitting element in a display panel according to an embodiment of the present disclosure;

FIG. 4 is an AA' cross-sectional view of the display panel of FIG. 2;

FIG. 5 is a diagram illustrating the relationship between the duty ratio of the pulse signal and the brightness of the light emitting element;

FIG. 6 is a schematic diagram of a pulse signal transmitted from the control terminal of the driving transistor;

FIG. 7 is a top view of a second power line in the second electrode layer;

FIG. 8 is a top view of the first power line in the first electrode layer corresponding to that of FIG. 7;

FIG. 9 is another cross-sectional view AA' of the display panel of FIG. 2;

fig. 10 is a top view structural diagram of the first touch electrode and the second touch electrode when the touch electrodes are mutual capacitance structures;

FIG. 11 is a schematic view of an electric field acting on the first touch electrode and the second touch electrode in FIG. 10;

FIG. 12 is a top view of the second power line and the first power line when the touch electrode is only multiplexing the second power line;

FIG. 13 is a schematic view of an electric field effect of the first touch electrode and the second touch electrode;

FIG. 14 is another AA' cross-sectional view of the display panel of FIG. 2;

FIG. 15 is a top view of a touch electrode corresponding to the display panel structure of FIG. 14;

fig. 16 is a schematic layout view of the touch lead and the control signal line disposed on the second electrode layer;

FIG. 17 is another AA' cross-sectional view of the display panel of FIG. 2;

FIG. 18 is another cross-sectional view AA' of the display panel of FIG. 2;

fig. 19 is a schematic view of the first touch electrode and the second touch electrode corresponding to fig. 18;

fig. 20 is a schematic view illustrating a display device according to an embodiment of the present disclosure.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Fig. 1 is a cross-sectional view of a display panel 300 in the prior art, where the display panel 300 is a touch display panel, the touch display panel includes a substrate 301, a light emitting device 303 and a touch layer 304, a first insulating filling layer 308 is disposed on a side of the light emitting device 303 away from the substrate 301, a surface of the first insulating filling layer 308 away from the light emitting device 303 forms a planarized surface, and the touch layer 304 is disposed on a surface of the first insulating filling layer 308 away from the substrate 301. The touch layer 304 includes a first electrode layer 305, a second electrode layer 307, and a second insulating filling layer 306 located between the first electrode layer 305 and the second electrode layer 307, wherein the first electrode layer 305 is located on a side of the second insulating filling layer 306 away from the substrate base 301. It can be seen that, when the touch layer 304 is integrated in the display panel 300 in the prior art, two insulating filling layers need to be formed between the first electrode layer 305 and the light emitting element 303, and since the first insulating filling layer 308 needs to form a planarized surface on the side of the light emitting element 303 away from the substrate base 301, the thickness of the first insulating filling layer 308 needs to be greater than that of the light emitting element 303 in the direction perpendicular to the substrate base 301, and therefore, after the touch layer 304 is introduced, the overall thickness of the display panel 300 is difficult to be further reduced.

Fig. 2 is a top view of a display panel according to an embodiment of the present disclosure, fig. 3 is a schematic diagram illustrating electrical connections between a driving transistor and a light emitting device in the display panel according to the embodiment of the present disclosure, fig. 4 is a cross-sectional view of an AA' of the display panel according to fig. 2, please refer to fig. 2 to 4, a display panel 100 according to the present disclosure includes a light emitting device D0 arranged in an array and a driving transistor M0 electrically connected to a light emitting device D0; the display panel 100 further includes a substrate base plate 10, and a first electrode layer 21 and a second electrode layer 22 insulated from each other, the first electrode layer 21 and the second electrode layer 22 are located on at least one side of the substrate base plate 10 along a direction perpendicular to the substrate base plate 10, the first electrode layer 21 includes a first power line PVDD, and the second electrode layer 22 includes a second power line PVEE;

a first pole of the light emitting element D0 is electrically connected to a first power supply line PVDD; the second pole of the light emitting element D0 is electrically connected to the first pole of the driving transistor M0 for receiving the data signal; the second pole of the driving transistor M0 is electrically connected to the second power supply line PVEE; the control end of the driving transistor M0 is electrically connected with the control signal wire PWM;

the display panel 100 further includes a touch electrode multiplexing the first power line PVDD and/or the second power line PVEE.

Fig. 2 schematically illustrates only one shape of the display panel 100, and in some other embodiments of the present application, the display panel 100 may be embodied in a circular shape, an elliptical shape, or other irregular structures, in addition to a rectangular shape, and the present application does not specifically limit the shape of the display panel 100. The light-emitting elements D0 shown on the display panel 100 in fig. 2 are also only schematic and do not represent actual sizes, numbers, and shapes. Note that, in order to clearly embody the present invention, only the light emitting element D0 and the base substrate 10 are shown in the top view of fig. 2, and other components are not shown. The cross-sectional view shown in fig. 4 is also merely a schematic view of the relative positional relationship of the film layers, and does not represent actual dimensions.

Alternatively, the light emitting element D0 mentioned in the embodiments of the present application may be a conventional LED, a Micro LED, a Mini LED, or the like, and this application is not particularly limited thereto. In addition, in an actual production process, the driving transistor M0 and the light emitting element D0 may be disposed on a circuit formed on the substrate 10 through a bonding or binding process, and the substrate 10 may be a glass substrate.

Specifically, with continued reference to fig. 2 to 4, the display panel 100 provided by the present application includes a light emitting element D0 and a driving transistor M0 connected to the light emitting element D0, wherein a first pole of the light emitting element D0 is electrically connected to a first power line PVDD, and a second pole of the light emitting element D0 is electrically connected to a first pole of the driving transistor M0 for receiving a data signal sent thereto by the driving transistor M0; the second pole of the driving transistor M0 is electrically connected to the second power line PVEE, the control terminal is electrically connected to the control signal line PWM, and the control signal line PWM is used for transmitting a control signal to the driving transistor M0, and controlling the brightness of the light emitting device D0 by the control signal, without introducing a complicated control timing sequence, thereby facilitating to improve the response speed of the light emitting device D0. In particular, since the first power line PVDD and the second power line PVEE in the present application are respectively located on two different film layers, that is, respectively located on the first electrode layer 21 and the second electrode layer 22, when the touch electrode is introduced into the display panel 100, the touch electrode multiplexes the first power line PVDD and/or the second power line PVEE, and compared with the prior art that when the touch layer is introduced on the side of the light emitting element D0 away from the substrate 10, the first insulating filling layer and the second insulating filling layer are introduced together to increase the thickness of the display panel, the touch electrode in the present application directly multiplexes the first power line PVDD and/or the second power line PVEE in the display panel 100, and there is no need to introduce a new film layer structure into the display panel 100 to provide the touch electrode, and the existing film layer structure is multiplexed, so that the touch function of the display panel 100 is realized, and the film layer structure of the display panel 100 is also facilitated to be simplified, the thickness of the display panel 100 is reduced, thereby being beneficial to realizing the demand of thinning the display panel 100.

It should be noted that the touch electrode in the present application may only multiplex the first power line PVDD, only multiplex the second power line PVEE, or multiplex the first power line PVDD and the second power line PVEE at the same time, and specific implementation manners will be described in detail in the following, which is not described herein again.

In an alternative embodiment of the present invention, referring to fig. 3 and 4, during the display phase, the control signal line PWM transmits a pulse signal to the driving transistor M0.

With continued reference to fig. 3 and fig. 4, the control terminals of the driving transistors M0 are electrically connected to the control signal lines PWM in a one-to-one correspondence manner, and are configured to receive the pulse signals transmitted by the control signal lines PWM, and the duty ratio of the pulse signals is proportional to the display gray scale of the light emitting element D0, that is, the higher the duty ratio of the pulse signals is, the higher the display gray scale of the corresponding light emitting element D0 is, the higher the brightness is; as the duty ratio of the pulse signal is smaller, the lower the display gray scale of the corresponding light emitting element D0 is, the darker the brightness is, please refer to fig. 5 and fig. 6, fig. 5 is a schematic diagram illustrating the relationship between the duty ratio of the pulse signal and the brightness of the light emitting element D0, fig. 6 is a schematic diagram illustrating the pulse signal transmitted from the control terminal of the driving transistor M0, wherein the duty ratio of the pulse signal a is smaller than that of the pulse signal b, and when the pulse signal a is input to the control terminal of the driving transistor M0, the corresponding light emitting element D0 will assume a dark state; when the control terminal of the driving transistor M0 receives the pulse signal b, the corresponding light emitting element D0 will be in a bright state. Therefore, the brightness of the light-emitting element D0 corresponding to each driving transistor M0 can be adjusted by adjusting the duty ratio of the pulse signal, so that the phenomenon that the brightness of the light-emitting element D0 fluctuates due to the fluctuation of the gate voltage of the driving transistor in the prior art is avoided, and the accuracy of the display brightness of the light-emitting element D0 is improved in a pulse signal control mode. In addition, the driving transistor M0 in the present application can control the light emitting brightness of the light emitting device D0 by using a pulse signal, which is beneficial to simplifying the circuit structure and simplifying the control process of the light emitting device D0. In addition, the light emitting brightness of the light emitting device D0 is directly controlled by the pulse signal, and a complicated control timing sequence is not introduced, thereby facilitating the improvement of the response speed of the light emitting device D0.

In an alternative embodiment of the present invention, please continue to refer to fig. 4, the first electrode layer 21 and the second electrode layer 22 are located on the same side of the substrate 10, and along a direction perpendicular to the substrate 10, the first electrode layer 21 is located between the second electrode layer 22 and the substrate 10, and the first electrode layer 21 and the second electrode layer 22 are isolated by the first insulating layer 91; the driving transistor M0 and the light emitting element D0 are located on the side of the second electrode layer 22 away from the base substrate 10.

Specifically, fig. 4 shows that the first power line PVDD, the second power line PVEE, the driving transistor M0, and the light emitting element D0 are located on the same side of the substrate 10, wherein the driving transistor M0 and the light emitting element D0 are both located on a side of the second power line PVEE away from the substrate 10, in an actual production process, the driving transistor M0 and the light emitting element D0 may be electrically connected to a circuit in the display panel 100 through a bonding or binding process, and the bonding or binding of the driving transistor M0 and the light emitting element D0 is completed on the same side of the substrate 10.

In an alternative embodiment of the invention, please refer to fig. 4, 7 and 8, in which fig. 7 is a top view of a second power line PVEE in the second electrode layer 22, fig. 8 is a top view of a first power line PVDD in the first electrode layer 21 corresponding to fig. 7, when the touch electrode 30 multiplexes the second power line PVEE, the touch electrode 30 includes a plurality of touch electrode blocks 31, the display panel 100 further includes a plurality of touch leads T, the touch leads T are disposed on the same layer as the first electrode layer 21, and the touch electrode blocks are electrically connected to the touch leads T through the first vias in a one-to-one correspondence manner; the first via hole penetrates the first insulating layer in a direction perpendicular to the substrate base plate 10. It should be noted that, considering that the touch lead T is located on the first electrode layer 21, the touch lead shown in fig. 7 is shown in a dotted line form.

Specifically, referring to fig. 4, 7 and 8, when the touch electrode 30 is introduced into the display panel 100 and the touch electrode 30 is reused with the second power line PVEE, a plurality of touch electrode blocks 31 are formed on the second power line PVEE, and a plurality of touch leads T are formed on the first power line PVDD. The touch electrodes 30 are embodied as self-capacitance touch electrodes, each touch electrode block 31 in the touch electrodes 30 is electrically connected to a touch lead T on the first power line PVDD in a one-to-one correspondence manner, and since the touch electrode block 31 and the touch lead T electrically connected thereto are respectively located on the second electrode layer 22 and the first electrode layer 21, the touch electrode and the touch lead T are electrically connected through the first via hole K1 penetrating through the first insulating layer 91. In the display panel 100, during the display period, the first power line PVDD and the second power line PVEE are used to provide power signals to the driving transistor M0 and the light emitting element D0, and optionally, the driving transistor M0 is turned on, and the control signal line PWM transmits a pulse signal to the driving transistor; in the touch phase, the second power line PVEE is reused as a self-capacitance touch electrode, and the driving transistor M0 is optionally turned off in the touch phase by transmitting and receiving a touch signal through the touch lead T on the first power line PVDD. In this way, the first power line PVDD and the second power line PVEE in the display panel 100 are reused as the touch electrode 30 and the touch lead T, and it is not necessary to introduce a new film structure to manufacture the touch electrode on the side of the light emitting element D0 away from the substrate 10, which is beneficial to realizing the thin design of the display panel 100 while realizing the touch function of the display panel 100.

In an alternative embodiment of the present invention, referring to fig. 4 and fig. 7, each touch electrode block 31 corresponds to at least one light emitting device D0 along a direction perpendicular to the substrate 10.

Alternatively, the light emitting elements D0 in the present application are arranged in an array in the display area of the display panel 100, and when the touch electrodes are multiplexed with the second power line PVEE to form a plurality of touch electrode blocks 31, each touch electrode block 31 may correspond to one light emitting element D0, or two or more light emitting elements D0. When referred to correspondingly herein, the orthographic projection of one touch electrode block 31 onto the base substrate 10 covers the orthographic projection of one or more light-emitting elements D0 onto the base substrate 10 in the direction perpendicular to the plane of the base substrate 10. In the actual production process, the touch electrode block 31 with an appropriate size can be manufactured according to the process capability, and the smaller the size of the touch electrode block 31, that is, the smaller the number of the light emitting elements D0 corresponding thereto, the higher the touch accuracy of the corresponding display panel 100, and the actual number of the light emitting elements D0 corresponding to the touch electrode block 31 is not specifically limited in the present application.

In an alternative embodiment of the invention, with continued reference to fig. 4 and fig. 8, in the display panel 100 provided by the present application, the control signal line PWM electrically connected to the gate of the driving transistor M0 is disposed in the same layer as the first electrode layer 21, that is, the control signal line PWM is disposed on the first electrode layer 21, and in an actual application process, the gate of the driving transistor M0 is electrically connected to the control signal line PWM through a via hole. When the control signal line PWM electrically connected to the driving transistor M0 is disposed on the first electrode layer 21, in the direction perpendicular to the plane of the substrate 10, the second electrode layer 22 is disposed on the side of the control signal line PWM far away from the substrate 10, and in the display stage, the second power line PVEE on the second electrode layer 22 generally receives a fixed level signal, such as ground, so that the second power line PVEE can shield the external signal, and avoid the external signal from interfering with the signal on the control signal line PWM, thereby facilitating to improve the display stability of the display panel 100.

Optionally, referring to fig. 8, when the touch lead T and the control signal line PWM are disposed on the same layer, the touch lead T and the control signal line PWM are alternately arranged, that is, two adjacent control signal lines PWM are isolated by one touch lead T, and two adjacent touch leads T are isolated by one control signal line PWM, so that, in the display stage, the coupling capacitance between the adjacent control signal lines PWM is favorably reduced, and the accuracy of the signal transmitted on the control signal lines PWM is improved; meanwhile, in the touch stage, it is beneficial to reduce crosstalk between adjacent touch leads T, and to improve the touch accuracy of the display panel 100.

In an alternative embodiment of the present invention, fig. 9 is another AA' cross-sectional view of the display panel 100 shown in fig. 2, the display panel 100 further includes a first metal layer 61 located on a side of the second electrode layer 22 away from the substrate base plate 10, and the control signal line PWM is located on the first metal layer 61.

Specifically, referring to fig. 9, in the present application, a first metal layer 61 is disposed on a side of the second electrode layer 22 away from the substrate 10, and a control signal line PWM electrically connected to the gate of the driving transistor M0 is disposed on the first metal layer 61, so that, equivalently, the first metal layer 61 is introduced between the driving transistor M0 and the second electrode layer 22, the control signal line PWM is disposed on the first metal layer 61, and in the display phase, the control signal is sent to the driving transistor M0 through the control signal line PWM disposed on the first metal layer 61, and the control of the light emitting brightness of the light emitting element D0 can be realized without increasing the overall thickness of the display panel 100.

In an alternative embodiment of the present invention, please refer to fig. 9 and 10, fig. 10 is a top view structural diagram of a first touch electrode and a second touch electrode when the touch electrodes are in a mutual capacitance structure, fig. 11 is a schematic diagram of an electric field effect of the first touch electrode and the second touch electrode in fig. 10, when the touch electrodes simultaneously multiplex a first power line PVDD and a second power line PVEE, the touch electrodes include a plurality of first touch electrodes 41 multiplexing the first power line PVDD and a plurality of second touch electrodes 42 multiplexing the second power line PVEE, and the first touch electrodes 41 and the second touch electrodes 42 are disposed opposite to each other along a direction perpendicular to the substrate 10; the orthographic projection of the second touch electrode 42 on the substrate 10 is within the orthographic projection range of the first touch electrode 41 on the substrate 10.

Specifically, referring to fig. 9, 10 and 11, when the touch electrode simultaneously multiplexes the first power line PVDD and the second power line PVEE, the touch electrode may be embodied as a mutual capacitance type touch electrode including a first touch electrode 41 and a second touch electrode 42, wherein the first touch electrode 41 multiplexes the first power line PVDD, the second touch electrode 42 multiplexes the second power line PVEE, and the first touch electrode 41 and the second touch electrode 42 are disposed opposite to each other along a direction perpendicular to the substrate 10. In the display stage, the first and second power lines PVDD and PVEE are used to supply power signals to the driving transistor M0 and the light emitting element D0; in the touch stage, the first power line PVDD is multiplexed as the first touch electrode 41, the second power line PVEE is multiplexed as the second touch electrode 42, electric field lines are formed between the first touch electrode 41 and the second touch electrode 42, and the number of the electric field lines is in direct proportion to the coupling capacitance between the first touch electrode 41 and the second touch electrode 42; when a touch occurs, a capacitance is formed between the touch main body and the first touch electrode 41 and the second touch electrode 42, the capacitance reduces the number of electric field lines between the first touch electrode 41 and the second touch electrode 42, that is, the coupling capacitance between the first touch electrode 41 and the second touch electrode 42 is reduced, and the touch position can be known according to the variation condition of the coupling capacitance between the first touch electrode 41 and the second touch electrode 42. Therefore, the touch electrode in the form of mutual capacitance is formed by multiplexing the first power line PVDD and the second power line PVEE, and the touch function of the display panel 100 is realized on the premise of not increasing an additional film layer, so that the thickness of the display panel 100 with the touch function is reduced, and the thin design of the display panel 100 is realized.

In an alternative embodiment of the present invention, referring to fig. 10 and 11, the first touch electrodes 41 are strip-shaped electrodes, and the second touch electrodes 42 disposed opposite to the same first touch electrodes 41 along a direction perpendicular to the substrate 10 include a plurality of touch electrode blocks, the plurality of touch electrode blocks are arranged along a first direction, and the first direction is an extending direction of the first touch electrodes 41.

Specifically, please refer to fig. 10 and fig. 11, when the touch electrodes in the present application are mutual capacitors, the first touch electrodes 41 are configured as strip electrodes, a minimum etching distance is reserved between each strip electrode, an area of one first touch electrode 41 is larger than an area of one touch electrode block, and a plurality of touch electrode blocks are correspondingly disposed on the same first touch electrode 41. In the touch phase, when a touch occurs, a coupling capacitance is formed between the touch main body and the touch electrode block, so that the coupling capacitance between the touch electrode block and the first touch electrode 41 changes, and thus an actual touch position is known, and optionally, in the touch phase, the driving transistor M0 is in an off state. When the second touch electrode 42 is configured as a plurality of touch electrode blocks, the position of the touch electrode block where the coupling capacitance between the second touch electrode 42 and the first touch electrode 41 changes can be known more accurately, and thus the touch position can be known more accurately, which is beneficial to improving the touch precision of the display panel 100, and meanwhile, because the first touch electrode 41 and the second touch electrode 42 multiplex the first power line PVDD and the second power line PVEE, the film structure of the display panel 100 with a touch function can be simplified, and the thin design of the display panel 100 can be realized. It should be noted that the touch electrode blocks in the second touch electrode 42 are electrically connected to the first touch leads T1 in a one-to-one correspondence manner, and optionally, the first touch leads are located on the first electrode layer; the first touch electrode 41 is electrically connected to the second touch lead T2, and optionally, the second touch lead T2 and the first touch electrode 41 are disposed on the same layer.

Optionally, referring to fig. 9 to 11, the second touch electrode 42 is a touch sensing electrode, the first touch electrode 41 is a touch emitting electrode, and when the second touch electrode 42 is disposed on the second electrode layer 22, the second touch electrode 42 is closer to the touch main body, and when a touch occurs, a coupling capacitance formed between the second touch electrode 42 and the touch main body is more obvious, so that the variation of the coupling capacitance between the first touch electrode 41 and the second touch electrode 42 is more obvious, thereby being beneficial to improving the touch sensitivity of the display panel 100.

In an alternative embodiment of the invention, please refer to fig. 9, 12 and 13, fig. 12 is a top view of the second power line PVEE and the first power line PVDD when the touch electrodes only multiplex the second power line PVEE, fig. 13 is a schematic diagram of an electric field effect of the first touch electrodes 51 and the second touch electrodes 52, when the touch electrodes multiplex the second power line PVEE, the touch electrodes include a plurality of first touch electrodes 51 and a plurality of second touch electrodes 52, the first touch electrodes 51 and the second touch electrodes 52 both multiplex the second power line PVEE, and the orthographic projections of the first touch electrodes 51 and the second touch electrodes 52 to the substrate 10 are not overlapped.

Specifically, fig. 12 to 13 show a structure of the display panel 100 and a specific implementation manner of the touch electrode when the touch electrode is multiplexed with only the second power line PVEE. With continued reference to fig. 12 to 13, when the touch electrode is only multiplexed with the second power line PVEE and the touch electrode is a mutual capacitance type touch electrode, the touch electrode includes a plurality of first touch electrodes 51 and a plurality of second touch electrodes 52, orthogonal projections of the first touch electrodes 51 and the second touch electrodes 52 to the substrate 10 are not overlapped, and at this time, a coupling capacitance between the first touch electrodes 51 and the second touch electrodes 52 is represented as a capacitance formed between the first touch electrodes 51 and the second touch electrodes 52 adjacent to each other in the horizontal direction. In the touch stage, when a touch occurs, a capacitance is formed between the touch subject and the second touch electrode 52, so that the coupling capacitance between the first touch electrode 51 and the second touch electrode 52 changes, thereby determining the position where the touch occurs. In this way, the first touch electrode 51 and the second touch electrode 52 are both disposed on the second electrode layer 22, and in the actual manufacturing process, the first touch electrode 51 and the second touch electrode 52 can be formed at the same time by performing the graphic design on the second electrode layer 22, which is beneficial to simplifying the production process of the touch electrodes and improving the production efficiency of the display panel 100.

In an alternative embodiment of the present invention, please continue to refer to fig. 12, the first touch electrodes 51 are strip electrodes, and the first touch electrodes 51 extend along a first direction; the first touch electrodes 51 and the second electrodes are alternately arranged along the second direction, and the second touch electrode 52 includes a plurality of touch electrode blocks 521 arranged along the first direction, the first direction intersecting the second direction.

Specifically, with continued reference to fig. 12, the first touch electrode 51 is configured as a strip-shaped electrode extending along a first direction, the second touch electrode 52 adjacent to the first touch electrode 51 along a second direction is configured as a plurality of touch electrode blocks 521, and the plurality of touch electrode blocks 521 are arranged along the first direction. Thus, in the touch stage, when a touch occurs, due to the capacitance formed between the touch main body and the touch electrode block 521, the coupling capacitance between the first touch electrode 51 and the touch electrode block 521 changes, and when the second touch electrode 52 is set as the structure of the touch electrode block 521, the touch electrode block 521 whose coupling capacitance with the first touch electrode 51 changes can be accurately determined, so that the position where the touch occurs can be accurately known according to the touch electrode blocks 521, thereby being beneficial to improving the touch accuracy.

In an alternative embodiment of the invention, please continue to refer to fig. 12, the second electrode layer 22 includes a plurality of first touch leads T1, the first touch leads T1 are electrically connected to the first touch electrodes 51 in a one-to-one correspondence; the first electrode layer 21 includes a plurality of second touch leads T2, the orthographic projection of the first touch electrode 51 on the substrate 10 is located within the orthographic projection range of the first power line PVDD on the substrate 10, and the second touch leads T2 are electrically connected to the touch electrode blocks 521 in a one-to-one correspondence.

Specifically, when the touch electrodes are implemented as mutual capacitance type touch electrodes, the first touch electrode 51 and the second touch electrode 52 of the touch electrodes are electrically connected to the IC through the touch lead T for transmitting the touch signal. In the present application, a first touch lead T1 electrically connected to a first touch electrode 51 is disposed on the same layer as the first touch electrode 51, and a second touch lead T2 electrically connected to a touch electrode block 521 in a second touch electrode 52 is disposed on the first electrode layer 21, while the orthographic projection of the first touch electrode 51 on the substrate 10 is disposed within the orthographic projection range of the first power line PVDD on the substrate 10, as shown in fig. 12 and 13, in the direction perpendicular to the substrate 10, the first touch electrode 51 corresponds to the first power line PVDD, and the touch electrode block 521 in the second touch electrode 52 corresponds to the second touch lead T2, so as to ensure that there is no metal connected in the perpendicular direction between the first touch electrode 51 and the second touch electrode 52, so as to prevent the metal from causing a change in the coupling between the first touch electrode 51 and the second touch electrode 52, which may affect the touch performance of the display panel 100, therefore, the above-mentioned arrangement of the first touch electrode 51 and the second touch electrode 52 is beneficial to improving the touch accuracy of the display panel 100.

In an alternative embodiment of the present invention, fig. 14 is another AA' cross-sectional view of the display panel 100 in fig. 2, the substrate 10 includes a first side and a second side opposite to each other along a direction perpendicular to the substrate 10, wherein the first side is a side of the substrate 10 facing the light emitting surface of the display panel 100; the first electrode layer 21 is positioned at the first side, and the light emitting element D0 is positioned at the side of the first electrode layer 21 away from the substrate base plate 10; the second electrode layer 22 is located on the second side, and the driving transistor M0 is located on the side of the second electrode layer 22 away from the substrate base plate 10.

Specifically, referring to fig. 14, in the display panel 100 provided in the embodiment of the present application, the first electrode layer 21 and the second electrode layer 22 are respectively disposed on two sides of the substrate 10, the light emitting element D0 is located on a side of the first electrode layer 21 away from the substrate 10, the driving transistor M0 is located on a side of the second electrode layer 22 away from the substrate 10, and the substrate may be a glass substrate. In this way, in other words, the driving transistor M0 is disposed on the side of the substrate 10 away from the light emitting surface of the display panel 100, when a touch occurs, the distance between the touch body and the driving transistor M0 and the control signal line PWM is further, that is, the driving transistor M0 and the control signal line PWM electrically connected to the gate thereof are disposed away from the touch body, so that the influence of the signal generated during the touch process on the signal on the control signal line PWM is largely avoided, and the stability of signal transmission on the control signal line PWM is advantageously improved.

In an alternative embodiment of the invention, fig. 15 is a top view of the touch electrode 30 corresponding to the structure of the display panel 100 shown in fig. 14, when the touch electrode 30 multiplexes the first power line PVDD, the touch electrode 30 includes a plurality of touch electrode blocks 31, the display panel 100 further includes a plurality of touch leads T, and the touch electrode blocks 31 are electrically connected to the touch leads T in a one-to-one correspondence.

Specifically, referring to fig. 14 and 15, this embodiment shows a scheme when the touch electrode 30 multiplexes the first power line PVDD when the light emitting element D0 and the driving transistor M0 are respectively disposed on both sides of the substrate base plate 10. When the touch electrode 30 multiplexes the first power line PVDD, the touch electrode 30 may be embodied as a self-capacitance touch electrode 30 as shown in fig. 15. The self-capacitance touch electrode 30 is located on one side of the substrate 10 facing the light emitting surface of the display panel 100, and the driving transistor M0 and the second power line PVEE are located on one side of the light emitting surface of the substrate 10 facing the display panel 100, that is, the touch electrode 30 and the driving transistor M0 are isolated by the substrate 10 and the second power line PVEE, so that in the display stage, the substrate 10 and the second power line PVEE can shield external signals, and the external signals are prevented from interfering with signals transmitted on the control signal line PWM, thereby being beneficial to improving the display reliability of the display panel 100.

In an alternative embodiment of the present invention, please continue to refer to fig. 14 and fig. 15, the touch lead T and the second electrode layer 22 are disposed on the same layer, and the touch electrode block 31 is electrically connected to the touch lead T through the second via hole; the second via hole K2 penetrates the substrate base 10 in a direction perpendicular to the substrate base 10.

Specifically, please refer to fig. 14 and fig. 15, in the present application, the touch lead T electrically connected to the touch electrode block 31 is disposed on the second electrode layer 22, and the second power line PVEE layer is reused as the touch lead T, so that it is not necessary to introduce a separate metal film layer on the display panel 100 to dispose the touch lead T, which is beneficial to simplify the film layer structure of the display panel 100, and is more beneficial to reduce the thickness of the display panel 100, so that the display panel 100 meets the requirement of thinning.

It should be noted that, when the first electrode layer 21 and the second electrode layer 22 are respectively disposed on two sides of the substrate, for example, referring to fig. 14, the second via K2 needs to penetrate through the substrate 10, and the via K0 for forming an electrical connection between the driving transistor M0 and the light emitting element D0 needs to penetrate through the substrate, that is, a hole needs to be punched in the substrate. The substrate is punched in two ways, the first is to punch a hole on the substrate and then deposit the first electrode layer 21 and the second electrode layer 22 on both sides of the substrate. The second method is to deposit a first electrode layer 21 and/or a second electrode layer 22 on both sides of the substrate, then pattern the first electrode layer or the second electrode layer at the position where the hole needs to be punched in advance, so that no metal layer is present at the position corresponding to the hole, that is, a hollow structure is formed, then laser punching is performed on the substrate, and after the hole is punched, a metal or a conductive material is deposited in the hole, so that the substrate is electrically connected with the driving transistor or the light-emitting element. In the actual production process, the punching mode of the substrate base plate can be selected according to the actual situation, which is not specifically limited in the present application.

Taking the structure shown in fig. 14 as an example, in an actual production process, the first electrode layer 21 and the insulating layer may be sequentially deposited on the same side of the substrate, the insulating layer and the first electrode layer 21 are patterned, so that the first electrode layer 21 and the insulating layer form a hollow portion at a position corresponding to the via hole K0, and then the via hole K0 and the second via hole K2 are formed on the substrate by laser drilling; finally, the second electrode layer 22 is deposited on the side of the substrate 10 away from the first electrode layer 21, so that the material corresponding to the second electrode layer 22 is filled into the via hole K0 and the second via hole K2, and the second electrode layer is patterned to form a pattern electrically connected with the driving transistor M0, optionally, the driving transistor M0, the second electrode layer and the light-emitting element are electrically connected in a bonding manner, so that the via hole K0 and the second via hole K2 can be electrically connected with other components at the same time by depositing the material corresponding to the second electrode layer once, that is, the driving transistor or the light-emitting element is electrically connected, thereby facilitating simplification of the production process and improving the production efficiency. Alternatively, in the structure shown in fig. 14, the lengths of the three pins (i.e., the first pole, the second pole and the control terminal) of the driving transistor M0 are all shorter, and in some other embodiments of the present application, the length of one pin of the driving transistor M0 may also be longer, and the pin may directly extend into the via K0, which also enables the electrical connection between the driving transistor and the light emitting element.

In an alternative embodiment of the invention, please continue to refer to fig. 14, the control signal line PWM and the second electrode layer 22 are disposed on the same layer, that is, both the touch lead T and the control signal line PWM are disposed on the second electrode layer 22. Therefore, a film structure does not need to be additionally arranged for the control signal line PWM, and the control signal line PWM is also arranged on the second electrode layer 22, which is also beneficial to simplifying the film structure of the display panel 100 and reducing the overall thickness of the display panel 100.

Optionally, referring to fig. 16, fig. 16 is a schematic diagram illustrating an arrangement of the touch leads T and the control signal lines PWM on the second electrode layer 22, when the touch leads T and the control signal lines PWM are disposed on the same layer, the touch leads T and the control signal lines PWM are alternately arranged, that is, two adjacent control signal lines PWM are separated by one touch lead T, and two adjacent touch leads T are separated by one control signal line PWM, so that, in the display stage, the coupling capacitance between the adjacent control signal lines PWM is favorably reduced, and the accuracy of the signal transmitted on the control signal lines PWM is improved; meanwhile, in the touch stage, it is beneficial to reduce crosstalk between adjacent touch leads T, and to improve the touch accuracy of the display panel 100.

In an alternative embodiment of the present invention, fig. 17 is another AA' cross-sectional view of the display panel 100 in fig. 2, the display panel 100 further includes a second metal layer 62, the second metal layer 62 is located on a side of the second electrode layer 22 away from the substrate base plate 10, and the second metal layer 62 is separated from the second electrode layer 22 by a second insulating layer 92; the touch lead T is positioned on the second metal layer 62, and the touch electrode block is electrically connected with the touch lead T through the third via hole; the third via hole K3 penetrates the substrate base plate 10, the second electrode layer 22, and the second insulating layer 92 in a direction perpendicular to the substrate base plate 10.

Specifically, fig. 17 shows another schematic cross-sectional view of the display panel 100 when the driving transistor M0 and the light emitting element D0 are respectively located on two sides of the substrate base plate 10, in this embodiment, a second metal layer 62 is introduced on one side of the second electrode layer 22 away from the substrate base plate 10, a touch function lead electrically connected to a touch electrode block is disposed on the second metal layer 62, and the touch electrode block is electrically connected through a third via hole K3 penetrating through the substrate base plate 10, the second electrode layer 22 and the second insulating layer. The introduced second metal layer 62 is located between the driving transistor M0 and the second electrode layer 22, so that even if the second metal layer 62 is introduced to provide the touch lead T, the overall thickness of the display panel 100 is not increased, which is also beneficial to realizing a thin design of the display panel 100. It should be noted that the embodiment shown in fig. 17 shows a situation where a material corresponding to the first electrode layer 21 is deposited in the third via hole K3, in some other embodiments of the present application, the material filled in the via hole is different according to a difference in a via hole manufacturing process, and the section of the present application is only an illustration. In addition, the lengths of the pins of the driving transistor in fig. 17 are different, wherein the longest pin may directly extend into the via to form an electrical connection with the light emitting element, in some other embodiments of the present application, the length of the pin of the driving transistor may also be set to be other, for example, the longest pin is shortened, a conductive material is filled in the corresponding via to realize an electrical connection with the pin, and the like, which is not specifically limited in this application.

In an alternative embodiment of the present invention, with continued reference to fig. 17, the control signal line PWM is located in the second metal layer 62. In this embodiment, the control signal line PWM and the touch lead T are disposed on the same layer and are disposed on the second metal layer 62, so that the control signal line PWM and the touch lead T can be formed simultaneously by performing a graphic process on the second metal layer 62 in an actual production process, which is beneficial to simplifying a production process of the control signal line PWM and the touch lead T and improving production efficiency of the display panel 100.

It should be noted that, in some other embodiments of the present application, the touch signal lines and the touch leads T may also be disposed on different film layers, for example, the second electrode layer 22 and the second metal layer 62, and the details thereof are not described herein.

In an alternative embodiment of the invention, fig. 18 is another cross-sectional view AA' of the display panel 100 shown in fig. 2, and fig. 19 is a schematic view of a first touch electrode and a second touch electrode corresponding to fig. 18, where the touch electrodes simultaneously multiplex a first power line PVDD and a second power line PVEE, the touch electrodes include a plurality of first touch electrodes 71 and a plurality of second touch electrodes 72, and the first touch electrodes 71 and the second touch electrodes 72 are disposed opposite to each other along a direction perpendicular to the substrate 10; the first touch electrode 71 is multiplexed with a first power line PVDD, and the second touch electrode 72 is multiplexed with a second power line PVEE.

Specifically, referring to fig. 19, fig. 19 shows an arrangement of the touch electrodes when the first touch electrode 71 is multiplexed with the first power line PVDD, and an arrangement of the second touch electrode 72 when the second touch electrode 72 is multiplexed with the second power line PVEE, respectively. Optionally, in this embodiment, the first touch electrode 71 is used as a touch sensing electrode, and the second touch electrode 72 is used as a touch emitting electrode, when a touch occurs, the first touch electrode 71 is closer to a touch subject, which is more beneficial to sensing a touch signal, and thus is more beneficial to improving the touch sensitivity of the display panel 100.

It should be noted that, in the embodiment shown in fig. 18, the lengths of the pins of the driving transistor are different, where the longest pin may directly extend into the via to form an electrical connection with the light emitting element, and in some other embodiments of the present application, the length of the pin of the driving transistor may also be set to be other lengths, for example, the longest pin is shortened, a conductive material is filled in the corresponding via to achieve an electrical connection with the pin, and the like, which is not specifically limited in this application.

In an alternative embodiment of the present invention, please continue to refer to fig. 19, the first touch electrode 71 includes a plurality of touch electrode blocks 711, and the second touch electrode 72 is a strip electrode. In the present application, the first touch electrode 71 is set as the touch electrode block 711, when a touch occurs, a capacitance is formed between the touch electrode block 711 and the touch main body, which causes a change in the coupling capacitance between the touch electrode block 711 and the second touch electrode 72, and then the touch position can be accurately determined by the touch electrode block 711 whose coupling capacitance with the second touch electrode 72 changes. Therefore, the first touch electrode 71 is configured as the touch electrode block 711, and the second touch electrode 72 is configured as the strip electrode, which is beneficial to improving the touch accuracy of the display panel 100.

In an alternative embodiment of the invention, please continue to refer to fig. 18 and fig. 19, the display panel 100 further includes a third metal layer 63, the third metal layer 63 is located on a side of the first electrode layer 21 away from the substrate 10, the third metal layer 63 includes a plurality of third touch leads T3, and the touch electrode blocks 711 are electrically connected to the third touch leads T3 in a one-to-one correspondence manner; the display panel 100 further includes a plurality of fourth touch leads T4 located on the second electrode layer 22, and the fourth touch leads T4 are electrically connected to the second touch electrodes 72 in a one-to-one correspondence.

Specifically, since the first touch electrode 71 layer includes a plurality of touch electrode blocks 711, and the touch electrode blocks 711 and the third touch leads T3 are electrically connected in a one-to-one correspondence, the present application introduces the third metal layer 63 on the side of the first electrode layer 21 away from the substrate 10 in the display panel 100, and arranges the third touch lead T3 electrically connected to the touch electrode blocks 711 in the third metal layer 63, and simultaneously arranges the fourth touch lead T4 electrically connected to the second touch electrode 72 in the same layer as the second touch electrode 72. Although the third metal layer 63 is introduced, the third metal layer 63 is located between the light emitting element D0 and the first electrode layer 21, and the overall thickness of the display panel 100 is not actually increased, so that the touch function is realized, and the thickness of the display panel 100 is also reduced, thereby meeting the requirement of reducing the thickness of the display panel 100.

Based on the same inventive concept, the present application further provides a display device 200, and fig. 20 is a schematic diagram of the display device 200 provided in the embodiment of the present application, where the display device 200 includes the display panel 100 provided in any of the above embodiments of the present application. It should be noted that, for the embodiments of the display device 200 provided in the embodiments of the present application, reference may be made to the embodiments of the display panel 100, and repeated descriptions are omitted. The display device 200 provided by the present application may be: any product or component with practical functions such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.

In summary, the display panel and the display device provided by the invention at least achieve the following beneficial effects:

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display panel is characterized by comprising light emitting elements arranged in an array and a driving transistor electrically connected with the light emitting elements; the display panel further comprises a substrate base plate, a first electrode layer and a second electrode layer which are insulated from each other, the first electrode layer and the second electrode layer are positioned on at least one side of the substrate base plate along a direction perpendicular to the substrate base plate, the first electrode layer comprises a first power line, and the second electrode layer comprises a second power line;

2. The display panel according to claim 1, wherein the control signal line transmits a pulse signal to the driving transistor during a display period.

3. The display panel according to claim 1, wherein the first electrode layer and the second electrode layer are located on the same side of the substrate base plate, and the first electrode layer is located between the second electrode layer and the substrate base plate in a direction perpendicular to the substrate base plate, and the first electrode layer and the second electrode layer are separated by a first insulating layer; the driving transistor and the light emitting element are located on one side of the second electrode layer, which is far away from the substrate.

4. The display panel according to claim 3, wherein when the touch electrode multiplexes the second power line, the touch electrode comprises a plurality of touch electrode blocks, the display panel further comprises a plurality of touch leads, the touch leads are disposed on the same layer as the first electrode layer, and the touch electrode blocks are electrically connected to the touch leads through the first via holes in a one-to-one correspondence; the first via hole penetrates the first insulating layer in a direction perpendicular to the substrate base plate.

5. The display panel according to claim 4, wherein each of the touch electrode blocks corresponds to at least one of the light emitting elements in a direction perpendicular to the substrate base plate.

6. The display panel according to claim 3, wherein the control signal line is disposed on the same layer as the first electrode layer.

7. The display panel according to claim 3, further comprising a first metal layer on a side of the second electrode layer away from the substrate base plate, wherein the control signal line is located in the first metal layer.

8. The display panel according to claim 3, wherein when the touch electrode multiplexes the first power line and the second power line at the same time, the touch electrode includes a plurality of first touch electrodes multiplexing the first power line and a plurality of second touch electrodes multiplexing the second power line, and the first touch electrodes and the second touch electrodes are disposed to face each other in a direction perpendicular to the substrate base plate;

the orthographic projection of the second touch electrode on the substrate base plate is located in the orthographic projection range of the first touch electrode on the substrate base plate.

9. The display panel according to claim 8, wherein the first touch electrode is a strip electrode, and the second touch electrode disposed opposite to the first touch electrode along a direction perpendicular to the substrate includes a plurality of touch electrode blocks, the plurality of touch electrode blocks are arranged along a first direction, and the first direction is an extending direction of the first touch electrode.

10. The display panel according to claim 3, wherein when the touch electrode multiplexes the second power line, the touch electrode comprises a plurality of first touch electrodes and a plurality of second touch electrodes, the first touch electrodes and the second touch electrodes multiplex the second power line, and orthographic projections of the first touch electrodes and the second touch electrodes to the substrate do not overlap.

11. The display panel according to claim 10, wherein the first touch electrode is a stripe electrode, and the first touch electrode extends in a first direction; the first touch electrodes and the second electrodes are alternately arranged along a second direction, the second touch electrodes comprise a plurality of touch electrode blocks, the electrode blocks are arranged along the first direction, and the first direction is intersected with the second direction.

12. The display panel according to claim 11, wherein the second electrode layer comprises a plurality of first touch leads, and the first touch leads are electrically connected with the first touch electrodes in a one-to-one correspondence; the first electrode layer comprises a plurality of second touch leads, the orthographic projection of the first touch electrode on the substrate base plate is located in the orthographic projection range of the first power line on the substrate base plate, and the second touch leads are electrically connected with the touch electrode blocks in a one-to-one correspondence mode.

13. The display panel according to claim 1, wherein the substrate base comprises a first side and a second side opposite to each other in a direction perpendicular to the substrate base, wherein the first side is a side of the substrate base facing the light emitting surface of the display panel;

the first electrode layer is positioned at the first side, and the light-emitting element is positioned at one side of the first electrode layer, which is far away from the substrate; the second electrode layer is located on the second side, and the driving transistor is located on one side, far away from the substrate base plate, of the second electrode layer.

14. The display panel of claim 13, wherein when the touch electrode multiplexes the first power line, the touch electrode comprises a plurality of touch electrode blocks, the display panel further comprises a plurality of touch leads, and the touch electrode blocks are electrically connected to the touch leads in a one-to-one correspondence.

15. The display panel according to claim 14, wherein the touch lead and the second electrode layer are disposed on the same layer, and the touch electrode block is electrically connected to the touch lead through a second via hole; the second via hole penetrates through the substrate base plate along a direction perpendicular to the substrate base plate.

16. The display panel according to claim 15, wherein the control signal line is disposed on the same layer as the second electrode layer.

17. The display panel according to claim 14, further comprising a second metal layer on a side of the second electrode layer away from the substrate base plate, wherein the second metal layer is separated from the second electrode layer by a second insulating layer;

the touch lead is positioned on the second metal layer, and the touch electrode block is electrically connected with the touch lead through a third through hole; the third via hole penetrates through the substrate base plate, the second electrode layer and the second insulating layer along a direction perpendicular to the substrate base plate.

18. The display panel according to claim 17, wherein the control signal line is located in the second metal layer.

19. The display panel according to claim 13, wherein when the touch electrode simultaneously multiplexes the first power line and the second power line, the touch electrode includes a plurality of first touch electrodes and a plurality of second touch electrodes, and the first touch electrodes and the second touch electrodes are disposed to face each other in a direction perpendicular to the substrate base plate; the first touch electrode multiplexes the first power line, and the second touch electrode multiplexes the second power line.

20. The display panel of claim 19, wherein the first touch electrode comprises a plurality of touch electrode blocks, and the second touch electrode is a strip electrode.

21. The display panel according to claim 20, further comprising a third metal layer, the third metal layer being located on a side of the first electrode layer away from the substrate base plate, the third metal layer comprising a plurality of third touch leads, the touch electrode blocks being electrically connected to the third touch leads in a one-to-one correspondence; the display panel further comprises a plurality of fourth touch leads positioned on the second electrode layer, and the fourth touch leads are electrically connected with the second touch electrodes in a one-to-one correspondence manner.

22. A display device comprising a control circuit and the display panel according to any one of claims 1 to 21.