CN111580702B - Display panel and display device - Google Patents
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- CN111580702B CN111580702B CN202010488334.3A CN202010488334A CN111580702B CN 111580702 B CN111580702 B CN 111580702B CN 202010488334 A CN202010488334 A CN 202010488334A CN 111580702 B CN111580702 B CN 111580702B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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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 driving transistors electrically connected with the light-emitting elements; the display panel also comprises a substrate base plate, a first electrode layer and a second electrode layer which are mutually insulated, wherein the first electrode layer and the second electrode layer are positioned on at least one side of the substrate base plate along the direction vertical 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 the first power line; the second electrode of the light-emitting element is electrically connected with the first electrode of the driving transistor and is 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, and the touch electrode multiplexes the first power line and/or the second power line. Therefore, the film structure of the display panel is facilitated to be simplified, and the thickness of the display panel is reduced.
Description
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 functions are becoming a hot spot and mainstream technology trend of research. In recent years, touch panel technology has gradually replaced key technology as a mainstream technology of mobile terminals and the like. The touch screen technology is a technology for determining inputted information by detecting a touched position when a finger, pen, or the like touches a touch screen mounted on the front end of a display and transmitting the detected position to a CPU. At present, the application range of the touch screen is very wide, and main products comprise mobile terminals such as touch mobile phones, notebook computers and the like, man-machine display interfaces of industrial automation industry and the like.
The touch screen can be divided into: an external touch screen (Add on Mode Touch Panel), a cover surface touch screen (On Cell Touch Panel), and an in-cell touch screen (In Cell Touch Panel). The embedded touch screen is characterized in that the touch electrode of the touch screen is arranged in the display panel, and compared with an externally hung touch screen and a covered surface type touch screen, the embedded touch screen can reduce the overall thickness of the module and greatly reduce the manufacturing cost of the touch screen. In the existing embedded touch screen, although the touch electrode is integrated into the display panel, the film layer structure is complex, so that the thickness of the display panel is difficult to be further reduced.
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, a first electrode layer and a second electrode layer which are mutually insulated, the first electrode layer and the second electrode layer are positioned on at least one side of the substrate along the direction perpendicular to the substrate, 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 supply line; the second electrode of the light emitting element is electrically connected with the first electrode of the driving transistor and is 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 multiplexes 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 have the advantages that at least the following effects are realized:
the invention provides a display panel and a display device, which comprises a light-emitting element and a driving transistor connected with the light-emitting element, wherein a first pole of the light-emitting element is electrically connected with a first power line, and a second pole of the light-emitting element is electrically connected with the first pole of the driving transistor and is used for receiving a data signal sent by the driving transistor to 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 control signals to the driving transistor and controlling the brightness of the light emitting element through the control signals. In particular, 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, thereby realizing the touch function of the display panel, simplifying the film structure of the display panel, and reducing the thickness of the display panel, and further realizing the thinning requirements of the display panel and the display device.
Of course, it is not necessary for any one product embodying the invention to achieve all of the technical effects described above at the same time.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, 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 showing electrical connection between a driving transistor and a light emitting element in a display panel according to an embodiment of the present application;
FIG. 4 is a cross-sectional view of an AA' of the display panel of FIG. 2;
FIG. 5 is a diagram showing 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 a control terminal of a 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 FIG. 7;
FIG. 9 is another cross-sectional view of the display panel of FIG. 2, shown in AA';
FIG. 10 is a schematic diagram showing a top view of a first touch electrode and a second touch electrode when the touch electrodes are of a mutual capacitance structure;
FIG. 11 is a schematic diagram showing an electric field effect of 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 multiplexes only the second power line;
FIG. 13 is a schematic diagram showing an electric field effect of a first touch electrode and a 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 diagram showing an arrangement of touch leads and control signal lines on a second electrode layer;
FIG. 17 is another cross-sectional view AA' of the display panel of FIG. 2;
FIG. 18 is another cross-sectional view of the display panel of FIG. 2, shown in AA';
FIG. 19 is a schematic view of the first and second touch electrodes corresponding to FIG. 18;
fig. 20 is a schematic diagram of a display device according to an embodiment of the present application.
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, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one 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 specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary 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 element 303, and a touch layer 304, a first insulating filling layer 308 is disposed on a side of the light emitting element 303 away from the substrate 301, a surface of the first insulating filling layer 308 away from the light emitting element 303 forms a planarized surface, and the touch layer 304 is located on the 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 between the first electrode layer 305 and the second electrode layer 307, where the first electrode layer 305 is located on a side of the second insulating filling layer 306 away from the substrate 301. As can be seen, when the touch layer 304 is integrated in the display panel 300 in the prior art, two insulating filling layers are required to be formed between the first electrode layer 305 and the light emitting element 303, and since the first insulating filling layer 308 is required to form a planarized surface on the side of the light emitting element 303 away from the substrate 301, the thickness of the first insulating filling layer 308 is required to be greater than the thickness of the light emitting element 303 along the direction perpendicular to the substrate 301, so that it is difficult to further reduce the overall thickness of the display panel 300 after the touch layer 304 is introduced.
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.
Fig. 2 is a top view of a display panel according to an embodiment of the present application, fig. 3 is a schematic diagram illustrating electrical connection between a driving transistor and a light emitting element in the display panel according to an embodiment of the present application, fig. 4 is a cross-sectional view AA' of the display panel in fig. 2, and referring to fig. 2 to 4, a display panel 100 according to an embodiment of the present application includes light emitting elements D0 arranged in an array and a driving transistor M0 electrically connected to the light emitting elements D0; the display panel 100 further includes a substrate base 10, 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 being located at least one side of the substrate base 10 in a direction perpendicular to the substrate base 10, the first electrode layer 21 including a first power line PVDD, the second electrode layer 22 including a second power line PVEE;
a first electrode of the light emitting element D0 is electrically connected to the first power supply line PVDD; the second electrode of the light emitting element D0 is electrically connected to the first electrode of the driving transistor M0, for receiving a data signal; the second pole of the driving transistor M0 is electrically connected with a second power line PVEE; the control end of the driving transistor M0 is electrically connected with the control signal line 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 oval shape, or other irregular structure, and the shape of the display panel 100 is not particularly limited herein. The light emitting elements D0 shown in fig. 2 on the display panel 100 are also merely schematic, and do not represent actual sizes, numbers, and shapes. In order to clearly embody the present invention, only the light emitting element D0 and the substrate 10 are shown in the plan view of fig. 2, and other components are not shown. The cross-sectional view shown in fig. 4 is also merely a schematic representation of the relative positional relationship of the respective film layers, and does not represent the actual dimensions.
Alternatively, the light emitting element D0 mentioned in the embodiment of the present application may be a conventional LED, or may be a Micro LED or a Mini LED, which is not specifically limited in this application. In addition, in the actual production process, the driving transistor M0 and the light emitting element D0 may be disposed on a circuit formed of the substrate 10 through a bonding or binding process, and alternatively, the substrate 10 may be a glass substrate.
Specifically, referring to fig. 2 to 4, the display panel 100 provided in 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 the first power line PVDD, and a second pole of the light emitting element D0 is electrically connected to the 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, and the control end is electrically connected to the control signal line PWM, which is used for transmitting a control signal to the driving transistor M0, and controlling the brightness of the light emitting element D0 through the control signal, without introducing a complicated control timing, thereby being beneficial to improving the response speed of the light emitting element D0. Particularly, since the first power line PVDD and the second power line PVEE are respectively located in two different film layers, that is, 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, compared with the scheme that the first insulation filling layer and the second insulation filling layer are introduced together to cause the thickness increase of the display panel when the touch layer is introduced at the side of the light emitting element D0 far away from the substrate 10 in the prior art, 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 no new film layer structure is required to be introduced into the display panel 100 to set the touch electrode, and the existing film layer structure is multiplexed.
It should be noted that, in the present application, the touch electrode 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 descriptions, which are not repeated here.
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 terminal of each driving transistor M0 is electrically connected to the control signal line PWM in a one-to-one correspondence manner, and is configured to receive a pulse signal transmitted by the control signal line PWM, where the duty cycle of the pulse signal is proportional to the display gray level of the light emitting element D0, that is, the higher the duty cycle of the pulse signal, the higher the display gray level of the corresponding light emitting element D0, and the higher the brightness; as the duty ratio of the pulse signal is smaller, the display gray level of the corresponding light emitting element D0 is lower, and the brightness is darker, please refer to fig. 5 and 6, fig. 5 is a schematic diagram of 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 of the pulse signal transmitted by the control terminal of the driving transistor M0, wherein the duty ratio of the pulse signal a is smaller than the duty ratio of the pulse signal b, and when the control terminal of the driving transistor M0 inputs the pulse signal a, the corresponding light emitting element D0 will be in a dark state; when the control terminal of the driving transistor M0 inputs 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, and the phenomenon that the brightness of the light-emitting element D0 fluctuates due to the fluctuation of the grid voltage of the driving transistor in the prior art is avoided, so that the control mode of the pulse signal is beneficial to improving the accuracy of the display brightness of the light-emitting element D0. In addition, the driving transistor M0 in the present application can control the light emitting brightness of the light emitting element D0 by using the pulse signal, which is beneficial to simplifying the circuit structure and simplifying the control process of the light emitting element D0. In addition, the light-emitting brightness of the light-emitting element D0 is directly controlled by the pulse signal, and no complicated control timing is introduced, so that the response speed of the light-emitting element D0 is advantageously improved.
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 the 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 remote from the substrate base plate 10.
Specifically, fig. 4 shows a scheme that the first power line PVDD, the second power line PVEE, the driving transistor M0 and the light emitting element D0 are simultaneously 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, and in the actual production process, the driving transistor M0 and the light emitting element D0 can be electrically connected with the 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, which is simple in manufacturing process and beneficial to improving the production efficiency of the display panel 100.
In an alternative embodiment of the present invention, please refer to fig. 4, 7 and 8, 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 first vias in a one-to-one correspondence manner; the first via penetrates the first insulating layer in a direction perpendicular to the substrate base plate 10. Note that, considering that the touch lead T is located in 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 multiplexes 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 electrode 30 at this time is embodied as a self-capacitive touch electrode, each touch electrode block 31 in the touch electrode 30 is electrically connected to the touch lead T on the first power line PVDD in a one-to-one correspondence manner, and the touch electrode block 31 and the touch lead T electrically connected thereto are respectively located in the second electrode layer 22 and the first electrode layer 21, so that the touch electrode and the touch lead T are electrically connected through the first via hole K1 penetrating the first insulating layer 91. In the display stage of the display panel 100, the first power line PVDD and the second power line PVEE are used to supply 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 pulse signals to the driving transistor; in the touch stage, the second power line PVEE is multiplexed into a self-capacitive touch electrode, and the touch signal is transmitted and received through the touch lead T on the first power line PVDD, and optionally, the driving transistor M0 is turned off in the touch stage. In this way, the first power line PVDD and the second power line PVEE in the display panel 100 are multiplexed as the touch electrode 30 and the touch lead T, and a new film structure is not required to be introduced into the side of the light emitting element D0 away from the substrate 10 to manufacture the touch electrode, so that the touch function of the display panel 100 is realized, and the thin design of the display panel 100 is facilitated.
In an alternative embodiment of the present invention, please refer to fig. 4 and fig. 7, each touch electrode block 31 corresponds to at least one light emitting element 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 multiplex 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 may correspond to two or more light emitting elements D0. When correspondingly referred to herein, the orthographic projection of one touch electrode block 31 onto the substrate 10 in the direction perpendicular to the plane of the substrate 10 covers the orthographic projection of one or more light emitting elements D0 onto the substrate 10. In the actual production process, the touch electrode block 31 with a proper 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 to the touch electrode block, the higher the touch accuracy of the corresponding display panel 100, so that the actual number of the light emitting elements D0 corresponding to the touch electrode block 31 is not specifically limited.
In an alternative embodiment of the present invention, please continue to refer to fig. 4 and 8, in the display panel 100 provided in the present application, the control signal line PWM electrically connected to the gate electrode of the driving transistor M0 is disposed at the same layer as the first electrode layer 21, i.e. the control signal line PWM is disposed at the first electrode layer 21, and in the practical application process, the gate electrode of the driving transistor M0 and the control signal line PWM are electrically connected through the via hole. When the control signal line PWM electrically connected to the driving transistor M0 is disposed on the first electrode layer 21, the second electrode layer 22 is disposed on a side of the control signal line PWM away from the substrate 10 in a direction perpendicular to the plane of 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, for example, a ground, so that the second power line PVEE can shield an external signal, and avoid interference of the external signal on the control signal line PWM, thereby being beneficial to improving 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, it is beneficial to reduce the coupling capacitance between the adjacent control signal lines PWM and improve the accuracy of the signals transmitted on the control signal lines PWM; meanwhile, in the touch stage, crosstalk between adjacent touch leads T is reduced, and touch accuracy of the display panel 100 is improved.
In an alternative embodiment of the present invention, fig. 9 is a cross-sectional view of another AA' of the display panel 100 in fig. 2, where the display panel 100 further includes a first metal layer 61 on a side of the second electrode layer 22 away from the substrate 10, and the control signal line PWM is located on the first metal layer 61.
Specifically, referring to fig. 9, the first metal layer 61 is disposed on a side of the second electrode layer 22 away from the substrate 10, and the control signal line PWM electrically connected to the gate electrode of the driving transistor M0 is disposed on the first metal layer 61, so that the first metal layer 61 is introduced between the driving transistor M0 and the second electrode layer 22, and the control signal line PWM is disposed on the first metal layer 61, and in the display stage, the control signal is sent to the driving transistor M0 through the control signal line PWM disposed on the first metal layer 61, so that the control of the light emitting brightness of the light emitting element D0 can be achieved 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 structure 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 the first power line PVDD and the 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 oppositely disposed along a direction perpendicular to the substrate 10; the orthographic projection of the second touch electrode 42 on the substrate 10 is located in 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 electrodes multiplex the first power line PVDD and the second power line PVEE at the same time, the touch electrodes may be embodied as touch electrodes in the form of mutual capacitance, and the touch electrodes include 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 power supply line PVDD and the second power supply line PVEE are used to supply power supply signals to the driving transistor M0 and the light emitting element D0; in the touch stage, the first power line PVDD is multiplexed into the first touch electrode 41, the second power line PVEE is multiplexed into 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 proportional 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 body and the first touch electrode 41 and the second touch electrode 42, and the number of electric field lines between the first touch electrode 41 and the second touch electrode 42 is reduced due to the capacitance, 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 change 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 the additional film layer, so that the thickness of the display panel 100 with the touch function is reduced, and the thinning 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 electrode 41 is a strip electrode, and the second touch electrode 42 opposite to the same first touch electrode 41 along the direction perpendicular to the substrate 10 includes a plurality of touch electrode blocks arranged along a first direction, and the first direction is an extending direction of the first touch electrode 41.
Specifically, referring to fig. 10 and 11, when the touch electrodes in the present application are the mutual capacitance touch electrodes, the first touch electrodes 41 are configured as stripe electrodes, the minimum etching distance is reserved between each stripe electrode, the area of one first touch electrode 41 is larger than the 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 stage, 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 is changed, and thus the actual touch position is known, and optionally, in the touch stage, the driving transistor M0 is in a cut-off state. When the second touch electrode 42 is set to be a plurality of touch electrode blocks, the position of the touch electrode block with the change of the coupling capacitance between the first touch electrode 41 can be known more accurately, so that the touch position can be known more accurately, the touch precision of the display panel 100 is improved, and meanwhile, the first touch electrode 41 and the second touch electrode 42 are multiplexed with the first power line PVDD and the second power line PVEE, so that the film structure of the display panel 100 with the touch function is simplified, and the thin design of the display panel 100 is 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, and optionally, the first touch leads are located in 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 is disposed on the same layer as the first touch electrode 41.
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 transmitting electrode, 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, the 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, which is beneficial to improving the touch sensitivity of the display panel 100.
In an alternative embodiment of the present 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 electrode multiplexes only the second power line PVEE, fig. 13 is a schematic diagram of an electric field effect of the first touch electrode 51 and the second touch electrode 52, when the touch electrode multiplexes the second power line PVEE, the touch electrode includes 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 each multiplex the second power line PVEE, and the front projections of the first touch electrodes 51 and the second touch electrodes 52 to the substrate 10 do not overlap.
Specifically, fig. 12 to 13 illustrate the structure of the display panel 100 and a specific implementation of the touch electrode when the touch electrode multiplexes only the second power line PVEE. With continued reference to fig. 12 to 13, when the touch electrode multiplexes only the second power line PVEE and the touch electrode is a touch electrode in the form of mutual capacitance, the touch electrode includes a plurality of first touch electrodes 51 and a plurality of second touch electrodes 52, and the orthographic projections of the first touch electrodes 51 and the second touch electrodes 52 onto the substrate 10 are not overlapped, at this time, the coupling capacitance between the first touch electrodes 51 and the second touch electrodes 52 is represented as the capacitance formed between the first touch electrodes 51 and the second touch electrodes 52 adjacent in the horizontal direction. In the touch stage, when a touch occurs, a capacitance is formed between the touch body and the second touch electrode 52, so that the coupling capacitance between the first touch electrode 51 and the second touch electrode 52 is changed, and the position where the touch occurs is determined. 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 simultaneously by performing the patterning design on the second electrode layer 22, so that the production process of the touch electrodes is simplified, and the production efficiency of the display panel 100 is improved.
In an alternative embodiment of the present invention, please continue to refer to fig. 12, the first touch electrode 51 is a strip electrode, and the first touch electrode 51 extends along the first direction; the first touch electrodes 51 and the second electrodes are alternately arranged along the second direction, and the second touch electrodes 52 include a plurality of touch electrode blocks 521 arranged along the first direction, and the first direction and the second direction intersect.
Specifically, referring to fig. 12, the first touch electrode 51 is configured as a strip electrode extending along the first direction, the second touch electrode 52 adjacent to the first touch electrode 51 along the 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. In this way, in the touch stage, when a touch occurs, since a capacitance is 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 configured as the structure of the touch electrode block 521, the touch electrode block 521 with the change of the coupling capacitance with the first touch electrode 51 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 present invention, please continue to refer to fig. 12, the second electrode layer 22 includes a plurality of first touch leads T1, and 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, where the orthographic projection of the first touch electrode 51 on the substrate 10 is located in 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 embodied as touch electrodes in the form of mutual capacitance, the first touch electrode 51 and the second touch electrode 52 in the touch electrodes are electrically connected to the IC through the touch lead T for transmitting touch signals. In the application, the first touch lead T1 electrically connected to the first touch electrode 51 is arranged on the same layer as the first touch electrode 51, and the second touch lead T2 electrically connected to the touch electrode block 521 in the second touch electrode 52 is arranged on the first electrode layer 21, and meanwhile, the orthographic projection of the first touch electrode 51 on the substrate 10 is arranged in the orthographic projection range of the first power line PVDD on the substrate 10, please refer to fig. 12 and 13, in the direction perpendicular to the substrate 10, the first touch electrode 51 corresponds to the first power line PVDD, the touch electrode block 521 in the second touch electrode 52 corresponds to the second touch lead T2, so that it is beneficial to ensure that no connection metal is arranged between the first touch electrode 51 and the second touch electrode 52 in the vertical direction, so as to prevent the connection metal from changing the coupling between the first touch electrode 51 and the second touch electrode 52, resulting in affecting the touch performance of the display panel 100, and thus the accuracy of the display panel 100 is improved by the arrangement of the first touch electrode 51 and the second touch electrode 52.
In an alternative embodiment of the present invention, fig. 14 is another AA' cross-sectional view of the display panel 100 in fig. 2, where the substrate 10 includes a first side and a second side opposite to each other along a direction perpendicular to the substrate 10, and 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 located at the first side, and the light emitting element D0 is located at a side of the first electrode layer 21 away from the substrate base plate 10; the second electrode layer 22 is located at the second side, and the driving transistor M0 is located at a 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, and the light emitting element D0 is located on a side of the first electrode layer 21 away from the substrate 10, and the driving transistor M0 is located on a side of the second electrode layer 22 away from the substrate 10, and the optional substrate may be a glass substrate. In this way, the driving transistor M0 is disposed on the side of the substrate 10 away from the light emitting surface of the display panel 100, and when a touch occurs, the distance between the touch body and the driving transistor M0 and the distance between the touch body and the control signal line PWM will be relatively long, 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 signals generated during the touch process on signals on the control signal line PWM is avoided to a great extent, and the stability of signal transmission on the control signal line PWM is improved.
In an alternative embodiment of the present invention, fig. 15 is a top view of a touch electrode 30 corresponding to the structure of the display panel 100 of fig. 14, where 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 supply line PVDD when the light emitting element D0 and the driving transistor M0 are respectively disposed on both sides of the substrate base 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-capacitive touch electrode 30 is located at 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 at one side of the substrate 10 principle 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 interference of external signals on signals transmitted on the control signal line PWM is avoided, 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 15, the touch electrode pad 31 is disposed on the same layer as the second electrode layer 22, and is electrically connected to the touch electrode pad T through the second via; the second via K2 penetrates the substrate 10 in a direction perpendicular to the substrate 10.
Specifically, referring to fig. 14 and 15, 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 multiplexed as the touch lead T, so that no separate metal film layer is required to be introduced on the display panel 100 to dispose the touch lead T, thereby facilitating simplification of the film structure of the display panel 100, further facilitating thickness reduction of the display panel 100, and enabling the display panel 100 to meet the requirement of thickness reduction.
It should be noted that, when the first electrode layer 21 and the second electrode layer 22 are 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 the electrical connection between the driving transistor M0 and the light emitting element D0 also needs to penetrate through the substrate, that is, needs to punch holes in the substrate. There are two ways of punching the substrate, the first way is to punch holes on the substrate first, and then deposit the first electrode layer 21 and the second electrode layer 22 on two sides of the substrate respectively. The second method is that the first electrode layer 21 and/or the second electrode layer 22 are respectively deposited on two sides of the substrate, then the first electrode layer or the second electrode layer is patterned in advance at the position needing to be perforated, so that the position corresponding to the perforation is free of a metal layer, namely a hollowed-out structure is formed, then the substrate is perforated by laser, and then metal or conductive material is deposited in the holes after the perforation, so that the electric connection with the driving transistor or the light-emitting element is realized. In the actual production process, the punching mode of the substrate can be selected according to the actual situation, which is not particularly limited in the application.
Taking the structure shown in fig. 14 as an example, in the actual production process, the first electrode layer 21 and the insulating layer can 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 hollow parts at positions corresponding to the through holes K0, and then the through holes K0 and the second through holes K2 are formed on the substrate by a laser drilling mode; finally, a second electrode layer 22 is deposited on one side of the substrate 10 far away from the first electrode layer 21, so that materials corresponding to the second electrode layer 22 are filled into the via hole K0 and the second via hole K2, a pattern electrically connected with the driving transistor M0 is formed by patterning the second electrode layer, alternatively, the electrical connection between the driving transistor M0 and the second electrode layer and the light-emitting element is realized by bonding, and thus, the electrical connection between the via hole K0 and the second via hole K2 and the electrical connection between the driving transistor or the light-emitting element and other components can be simultaneously formed by depositing the materials corresponding to the second electrode layer once, thereby being beneficial to simplifying the production process and improving the production efficiency. Alternatively, in the structure shown in fig. 14, the lengths of 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 set longer, and the pin may directly extend into the via K0, so that an electrical connection between the driving transistor and the light emitting element can be also achieved.
In an alternative embodiment of the present invention, please continue to refer to fig. 14, the control signal line PWM is disposed at the same layer as the second electrode layer 22, i.e. the touch lead T and the control signal line PWM are both disposed at the second electrode layer 22. In this way, the control signal line PWM is not required to be provided with a film structure, and the control signal line PWM is also required to be provided 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 layout diagram of a touch lead T and a control signal line PWM arranged on the second electrode layer 22, when the touch lead T and the control signal line PWM are arranged 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 a display stage, it is beneficial to reduce coupling capacitance between the adjacent control signal lines PWM and improve accuracy of signals transmitted on the control signal lines PWM; meanwhile, in the touch stage, crosstalk between adjacent touch leads T is reduced, and touch accuracy of the display panel 100 is improved.
In an alternative embodiment of the present invention, fig. 17 is a cross-sectional view of another AA' 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 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 a third via hole; the third via K3 penetrates the substrate 10, the second electrode layer 22, and the second insulating layer 92 in a direction perpendicular to the substrate 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 10, in this embodiment, the second metal layer 62 is introduced on the side of the second electrode layer 22 away from the substrate 10, and the touch function lead electrically connected to the touch electrode block is disposed on the second metal layer 62, and the touch electrode block is electrically connected through the third via K3 penetrating through the substrate 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, and thus the thin design of the display panel 100 is also facilitated. It should be noted that, the embodiment shown in fig. 17 illustrates a situation in which the material corresponding to the first electrode layer 21 is deposited in the third via K3, and in some other embodiments of the present application, the materials filled in the vias are different according to different via manufacturing flows, and the screenshot of the present application is only illustrative. In addition, the lengths of the pins of the driving transistor in fig. 17 are different, where the longest pin may directly extend into the via hole to form an electrical connection with the light emitting element, in other embodiments of the present application, the length of the pin of the driving transistor may be set to be different, for example, the longest pin is shortened, and the conductive material is filled in the corresponding via hole to implement an electrical connection with the pin, which is not specifically limited in this application.
In an alternative embodiment of the present invention, please continue to refer to fig. 17, the control signal line PWM is located at 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 both disposed on the second metal layer 62, so that the control signal line PWM and the touch lead T can be formed simultaneously after the second metal layer 62 is patterned in the actual production process, which is beneficial to simplifying the production process of the control signal line PWM and the touch lead T and improving the production efficiency of the display panel 100.
It should be noted that, in some other embodiments of the present application, the touch signal line and the touch lead T may also be disposed on different film layers, for example, disposed on the second electrode layer 22 and the second metal layer 62, respectively, which will not be described in detail herein.
In an alternative embodiment of the present invention, fig. 18 is a cross-sectional view of another AA' of the display panel 100 in fig. 2, fig. 19 is a schematic diagram of a first touch electrode and a second touch electrode corresponding to fig. 18, and when the touch electrodes simultaneously multiplex the first power line PVDD and the 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 multiplexes the first power line PVDD, and the second touch electrode 72 multiplexes the second power line PVEE.
Specifically, referring to fig. 19, fig. 19 shows an arrangement of touch electrodes when the first touch electrode 71 multiplexes the first power line PVDD, and an arrangement of touch electrodes 72 when the second touch electrode 72 multiplexes 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 transmitting electrode, so that when a touch occurs, the first touch electrode 71 is closer to the touch main body, which is more beneficial to sensing a touch signal, thereby being 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 hole to form an electrical connection with the light emitting element, and in other embodiments of the present application, the length of the pin of the driving transistor may be set to be other, for example, the longest pin is shortened, and the conductive material is filled in the corresponding via hole to implement an electrical connection with the pin, 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. 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, so that the coupling capacitance between the touch electrode block 711 and the second touch electrode 72 is changed, and the position where the touch occurs can be accurately judged through the touch electrode block 711 with the change of the coupling capacitance between the second touch electrode 72. 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 present invention, please continue to refer to fig. 18 and 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 pads 711 are electrically connected to the third touch leads T3 in a one-to-one correspondence; the display panel 100 further includes a plurality of fourth touch leads T4 disposed 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, the touch electrode blocks 711 are electrically connected to the third touch leads T3 in a one-to-one correspondence, the application introduces the third metal layer 63 on a side of the display panel 100, which is far away from the substrate 10, of the first electrode layer 21, and sets the third touch lead T3 electrically connected to the touch electrode blocks 711 on the third metal layer 63, and simultaneously sets the fourth touch lead T4 electrically connected to the second touch electrode 72 on 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 does not actually increase the overall thickness of the display panel 100, so that the touch function is realized, and the thickness of the display panel 100 is also reduced, thereby meeting the requirement of thinning 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 embodiments of the present application, where the display device 200 includes the display panel 100 provided in any of the embodiments described above. It should be noted that, in the embodiment of the display device 200 provided in the embodiment of the present application, reference may be made to the embodiment of the display panel 100 described above, and the repetition is omitted. The display device 200 provided in the present application may be: any product or component with realistic 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 realize the following beneficial effects:
the invention provides a display panel and a display device, which comprises a light-emitting element and a driving transistor connected with the light-emitting element, wherein a first pole of the light-emitting element is electrically connected with a first power line, and a second pole of the light-emitting element is electrically connected with the first pole of the driving transistor and is used for receiving a data signal sent by the driving transistor to 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 control signals to the driving transistor and controlling the brightness of the light emitting element through the control signals. In particular, 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, thereby realizing the touch function of the display panel, simplifying the film structure of the display panel, and reducing the thickness of the display panel, and further realizing the thinning requirements of the display panel and the display device.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the 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 (8)
1. A display panel 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, a first electrode layer and a second electrode layer which are mutually insulated, the first electrode layer and the second electrode layer are positioned on at least one side of the substrate along the direction perpendicular to the substrate, 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 supply line; the second electrode of the light emitting element is electrically connected with the first electrode of the driving transistor and is 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 also comprises a touch electrode;
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 second metal layer, the second metal layer is positioned on one side of the second electrode layer far away from the substrate base plate, and the second metal layer is isolated from the second electrode layer by a second insulating layer; the display panel further comprises a plurality of touch leads, the touch leads are positioned on the second metal layer, and the touch electrode block is electrically connected with the touch leads through a third via hole; the third via hole penetrates through the substrate base plate, the second electrode layer and the second insulating layer along the direction perpendicular to the substrate base plate; or,
when the touch electrodes multiplex the first power line and the second power line at the same time, the touch electrodes comprise a plurality of first touch electrodes and a plurality of second touch electrodes, the first touch electrodes comprise a plurality of touch electrode blocks, the display panel further comprises a third metal layer, the third metal layer is positioned on one side, far away from the substrate, of the first electrode layer, the third metal layer comprises a plurality of third touch leads, and the touch electrode blocks are electrically connected with the third touch leads in a one-to-one correspondence manner; 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 one-to-one correspondence.
2. The display panel according to claim 1, wherein the control signal line transmits a pulse signal to the driving transistor in a display period.
3. The display panel of claim 1, wherein the substrate includes a first side and a second side disposed opposite each other in a direction perpendicular to the substrate, wherein the first side is a side of the substrate facing the light-emitting surface of the display panel;
the first electrode layer is positioned on the first side, and the light-emitting element is positioned on one side of the first electrode layer away from the substrate base plate; the second electrode layer is positioned on the second side, and the driving transistor is positioned on one side of the second electrode layer away from the substrate base plate.
4. The display panel of claim 3, wherein the touch electrode pads are electrically connected to the touch leads in a one-to-one correspondence.
5. The display panel of claim 1, wherein the control signal line is located at the second metal layer.
6. The display panel according to claim 3, wherein the first touch electrode and the second touch electrode are disposed opposite to each other in a direction perpendicular to the substrate; the first touch electrode multiplexes the first power line, and the second touch electrode multiplexes the second power line.
7. The display panel of claim 6, wherein the second touch electrode is a stripe electrode.
8. A display device comprising a control circuit and the display panel of any one of claims 1 to 7.
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| CN114201073B (en) * | 2021-12-11 | 2023-11-07 | 武汉华星光电半导体显示技术有限公司 | Micro light-emitting diode touch display panel |
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