Display panel and electronic device

Abstract

Embodiments of the present application provide a display panel and an electronic device, which are used to realize high integration of the display panel. The display panel comprises a light-emitting layer and a touch layer which are arranged in a stack, and the touch layer comprises a first metal layer and a second metal layer which are arranged in a stack. The first metal layer comprises a first network and a second network, and the first network and the second network both extend along a first direction, and the first network and the second network are arranged along a second direction. The second metal layer comprises a third network and a fourth network, and the third network and the fourth network both extend along the second direction, and the third network and the fourth network are arranged along the first direction. The first network and the third network are used for touch detection, and the second network and the fourth network are used for detecting a signal of a stylus. The display panel integrates the network for detecting the stylus and the network for touch detection in the touch layer, so as to improve the layout utilization of the touch layer, and further improve the integration of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel and an electronic device. Background Technology

[0002] In electronic devices such as smartphones, tablets, and smartwatches, display panels are often combined with touch devices to enhance their intelligence. Consequently, styluses have emerged as auxiliary devices for touch input in electronic devices. Currently, styluses on the market can be divided into two types: capacitive active styluses and electromagnetic resonant styluses. Because capacitive active styluses are difficult to store and inconvenient to charge, electromagnetic resonant styluses have become the more widely used type.

[0003] However, in practical applications, electromagnetic resonant styluses require the addition of an electromagnetic film inside the display panel to detect the stylus signal. This setup results in a thicker display panel and a lower integration of the internal structure. Summary of the Invention

[0004] This application provides a display panel and an electronic device, which aims to solve the technical problem of low integration of the internal structure of the display panel.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] On one hand, a display panel is provided, comprising: a light-emitting layer and a touch layer stacked on the light-emitting layer. The touch layer includes a first metal layer and a second metal layer stacked on top of each other. The first metal layer includes a first network and a second network, both extending along a first direction and arranged along a second direction. The second metal layer includes a third network and a fourth network, both extending along the second direction and arranged along the first direction. The first and third networks are used for touch detection, and the second and fourth networks are used for detecting signals from a stylus. The first direction is perpendicular to the second direction, and the stacking direction passes through the plane containing the first and second directions.

[0007] In this embodiment, by integrating the second and fourth networks for detecting the stylus pen together with the first and third networks for touch detection within the touch layer, the increase in the thickness of the display panel caused by setting up a separate electromagnetic film for the second and fourth networks for detecting the stylus pen can be avoided. Furthermore, the layout utilization of the touch layer can be improved, thereby increasing the integration of the internal structure of the display panel.

[0008] Furthermore, in scenarios where both the first and second networks are multiple, the multiple first networks and multiple second networks can be arranged alternately along the second direction. This arrangement avoids intersections between individual first networks and individual second networks, thereby facilitating the adjustment of the width of the first or second network in the second direction and reducing the channel resistance of a single first or second network.

[0009] Similarly, when there are multiple third and fourth networks, the multiple third and fourth networks can be arranged alternately along the first direction to avoid the intersection between a single third network and a single fourth network. This makes it easier to adjust the width of the third or fourth network in the first direction, thereby reducing the channel resistance of the third or fourth network.

[0010] In some embodiments, the first metal layer further includes a first conductive mesh and a plurality of first conductive portions. The first conductive mesh includes a plurality of first metal grids arranged in an array. Each first conductive portion is stacked at an intersection of the first conductive mesh and is closer to the second metal layer than the first conductive mesh. The first conductive mesh includes a first network and a second network.

[0011] Based on the fabrication process of the touch layer, the first conductive mesh and the first conductive part can be formed on different initial metal meshes. By setting a first conductive part at each intersection of the first conductive mesh, the different positions of different initial metal meshes can be rationally utilized, thereby improving the integration of the internal circuit structure of the touch layer.

[0012] In some embodiments, the second metal layer further includes a second conductive mesh and a plurality of second conductive portions. The second conductive mesh includes a plurality of second metal grids arranged in an array, with the first metal grids and the second metal grids staggered along the stacking direction. Each second conductive portion is stacked at an intersection of the second conductive mesh, and the second conductive portion is closer to the first metal layer than the second conductive mesh. Each second conductive portion is located within a first metal grid, and each second metal grid contains one first conductive portion. The second conductive mesh includes a third network and a fourth network.

[0013] Based on the same touch layer fabrication process, the second conductive mesh and the second conductive part can also be formed on different initial metal meshes, and the initial metal meshes forming the second conductive mesh and the second conductive part can be the same metal meshes forming the first conductive mesh and the first conductive part. This achieves reasonable utilization of the initial metal meshes, improves the utilization rate of the initial metal meshes, and reduces the channel resistance of the first metal layer where the first conductive mesh is located and the second metal layer where the second conductive mesh is located.

[0014] Furthermore, by setting a second conductive part at each intersection of the second conductive mesh, and placing the second conductive part within the first metal mesh and the first conductive part within the second metal mesh, the distance between the first metal layers in the stacking direction Z can be reduced, thereby reducing the thickness of the first metal layer and the touch layer containing the first metal layer in the stacking direction, and further reducing the thickness of the entire display panel in the stacking direction, and improving the integration of the internal structure of the display panel.

[0015] In some embodiments, both the first metal mesh and the second metal mesh can be circular or rounded rectangles.

[0016] This configuration increases the width of the metal wires at the corners of the first and second conductive meshes, thereby reducing the channel resistance of the first and second conductive meshes formed by the metal wires.

[0017] In some embodiments, the orthographic projection of at least one first metal mesh onto the light-emitting layer is an open pattern. The orthographic projection of at least one second metal mesh onto the light-emitting layer is an open pattern.

[0018] In this embodiment, an open pattern refers to the presence of breaks in the metal lines of the first conductive mesh forming the first metal grid and the metal lines of the second conductive mesh forming the second metal grid.

[0019] This configuration reduces the overlap between the first and second conductive meshes, thereby reducing the parasitic capacitance between the first and second networks within the first conductive mesh and the third and fourth networks within the second conductive mesh.

[0020] In some embodiments, the first metal layer further includes a plurality of first channels, each first channel including at least one second network, and the first channels extending along a first direction, with the plurality of first channels arranged at intervals along a second direction. The second metal layer includes a plurality of second channels, with the first channels and second channels stacked along a stacking direction, each second channel including at least one fourth network, and the second channels extending along a second direction, with the plurality of second channels arranged at intervals along the first direction. Any two of the plurality of first channels constitute a first coil, and there are 2N1 first channels between two first channels connected to the first coil. Any two of the plurality of second channels constitute a second coil, and there are 2N1 second channels between two second channels connected to the second coil.

[0021] In this embodiment, by forming a first coil from any two of the multiple first channels and a second coil from any two of the multiple second channels, the first network in the first channel and the second network in the second channel can be brought out. Thus, by connecting a driving circuit or a sensing circuit at both ends of the first coil and the second coil, the display panel can drive and sense the stylus.

[0022] Furthermore, by setting the value of N1 appropriately, the coil widths of the first and second coils can be adjusted, thereby improving the driving strength, as well as the uniformity and resolution.

[0023] In some embodiments, the first metal layer further includes a plurality of first channels, each first channel including at least one second network, and the first channels extend along a first direction, with the plurality of first channels arranged at intervals along a second direction. The second metal layer includes a plurality of second channels, with the first channels and second channels stacked along a stacking direction. Each second channel includes at least one fourth network and extends along a second direction, with the plurality of second channels arranged at intervals along the first direction. Any four of the plurality of first channels constitute a third coil, and among the four first channels connected to the third coil, there are 2N² first channels between two first channels positioned near the sides along the second direction, and 2N³ first channels between two first channels positioned near the center along the second direction. Similarly, any four of the plurality of second channels constitute a fourth coil, and among the four second channels connected to the fourth coil, there are 2N² second channels between two second channels positioned near the sides along the first direction, and 2N³ second channels between two second channels positioned near the center along the first direction.

[0024] In this embodiment, by forming a third coil from any four of the multiple first channels and a fourth coil from any four of the multiple second channels, the first network in the first channel and the second network in the second channel can be brought out. Furthermore, by connecting a driving circuit or a sensing circuit to the two ends of the third and fourth coils, the display panel can drive and sense the stylus.

[0025] Furthermore, by setting the values ​​of N2 and N3 appropriately, the coil widths of the third and fourth coils can be adjusted, thereby improving the driving strength, uniformity, and resolution.

[0026] In some embodiments, the display panel further includes a display area and an edge area, with a touch layer disposed within the display area and the edge area surrounding the display area. The edge area includes a blocking plate and a lead-out area. The blocking plate is disposed on both sides of the display area along a first direction, and the lead-out area is disposed between the blocking plate and the display area. The edge area includes a first compensation channel disposed between the blocking plate and the lead-out area, and / or, the first compensation channel is stacked on the blocking plate, extending along a second direction and connected to a second channel.

[0027] In this embodiment, by setting a first compensation channel within the edge area, the display panel's ability to drive the stylus is improved when the stylus approaches the edge area, and the signal strength of the stylus is increased. Furthermore, this arrangement also improves the space utilization within the touch layer, increasing the device density of the internal components while maintaining the same touch layer thickness.

[0028] In some embodiments, the edge area further includes a second compensation channel, which is disposed on at least one side of the display area along a second direction, extends along a first direction, and is connected to the first channel.

[0029] In this embodiment, by providing a second compensation channel on one side of the display area in the second direction, the driving capability of the display panel for the stylus can be improved when the stylus is close to the side of the display panel in the second direction, and the signal strength of the stylus can be increased.

[0030] In some embodiments, the display panel further includes: a switching device, a differential sensing circuit, and a differential driving circuit, wherein the differential sensing circuit includes an operational amplifier. The switching device, operational amplifier, and differential driving circuit each include a first input terminal and a second input terminal. The switching device also includes a first output terminal and a second output terminal. One end of a first coil is connected to the first input terminal of the switching device, and the other end of the first coil is connected to the second input terminal of the switching device. The first output terminal of the switching device is connected to the first input terminal of the operational amplifier, and the second output terminal of the switching device is connected to the second input terminal of the operational amplifier; alternatively, the first output terminal of the switching device is connected to the first input terminal of the differential driving circuit, and the second output terminal of the switching device is connected to the second input terminal of the differential driving circuit.

[0031] In this embodiment, by incorporating an operational amplifier within the differential sensing circuit, when the first coil is subjected to interference from other signals, the interfering signal can enter the differential sensing circuit via the first and second input terminals. Under the action of the operational amplifier, the interference signal is canceled out, thereby improving the signal-to-noise ratio of the differential sensing circuit connected to the first coil. Furthermore, the two ends of the first coil can also be connected to the two input terminals of the differential driving circuit, thereby improving the stability and signal-to-noise ratio of the differential driving circuit.

[0032] In some embodiments, the display panel further includes: a switching device, a differential sensing circuit, and a differential driving circuit, wherein the differential sensing circuit includes an operational amplifier. The switching device, operational amplifier, and differential driving circuit each include a first input terminal and a second input terminal. The switching device also includes a first output terminal and a second output terminal. One end of a third coil is connected to the first input terminal of the switching device, and the other end of the third coil is connected to the second input terminal of the switching device. The first output terminal of the switching device is connected to the first input terminal of the operational amplifier, and the second output terminal of the switching device is connected to the second input terminal of the operational amplifier; alternatively, the first output terminal of the switching device is connected to the first input terminal of the differential driving circuit, and the second output terminal of the switching device is connected to the second input terminal of the differential driving circuit.

[0033] In this embodiment, by incorporating an operational amplifier within the differential sensing circuit, when the third coil is subjected to interference from other signals, the interfering signal can enter the differential sensing circuit via the first and second input terminals. Under the action of the operational amplifier, the interference signal is canceled out, thereby improving the signal-to-noise ratio of the differential sensing circuit connected to the third coil. Furthermore, the two ends of the first coil can also be connected to the two input terminals of the differential driving circuit, thereby improving the stability and signal-to-noise ratio of the differential driving circuit.

[0034] In some embodiments, the first network includes a plurality of first network units and a plurality of second network units, the first network units and the second network units being arranged alternately along a first direction, and the first network units and the second network units being connected. The area of ​​the orthographic projection of the first network unit onto the light-emitting layer is larger than the area of ​​the orthographic projection of the second network unit onto the light-emitting layer, and the orthographic projections of the second network unit onto the light-emitting layer and the orthographic projections of the third network onto the light-emitting layer at least partially overlap.

[0035] This configuration reduces the overlap area between the first and second networks in the stacking direction, thereby reducing the parasitic capacitance between the first and second networks and improving the accuracy of touch detection on the display panel.

[0036] In some embodiments, the third network includes a plurality of third network units and a plurality of fourth network units, which are arranged alternately along a second direction, and the third network units are connected to the fourth network units. The area of ​​the orthographic projection of the third network unit onto the light-emitting layer is larger than the area of ​​the orthographic projection of the fourth network unit onto the light-emitting layer, and the orthographic projection of the fourth network unit onto the light-emitting layer at least partially overlaps with the orthographic projection of the second network unit onto the light-emitting layer.

[0037] This configuration reduces the overlap area between the first and second networks in the stacking direction, thereby reducing the parasitic capacitance between the first and second networks and improving the accuracy of touch detection on the display panel.

[0038] On the other hand, embodiments of this application provide an electronic device comprising: a mid-frame, a back cover, and a display panel as described in any of the above embodiments. The mid-frame encloses an accommodating space, the back cover covers one side of the mid-frame, and the display panel covers the other side of the mid-frame. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only drawings in some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this application.

[0040] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0041] Figure 2 This is a schematic diagram of a touch layer provided in an embodiment of this application;

[0042] Figure 3 This is a schematic diagram of a first metal layer provided in an embodiment of this application;

[0043] Figure 4 This is a schematic diagram of the structure of a first metal layer provided in an embodiment of this application;

[0044] Figure 5 This is a schematic diagram of the structure of a first initial metal mesh provided in an embodiment of this application;

[0045] Figure 6 This is a schematic diagram of the structure of a second initial metal mesh provided in an embodiment of this application;

[0046] Figure 7 This is a schematic diagram of the structure of a touch layer provided in an embodiment of this application;

[0047] Figure 8 This is a schematic diagram of the structure of a second metal layer provided in an embodiment of this application;

[0048] Figure 9 A film layer diagram of a display panel provided in an embodiment of this application;

[0049] Figure 10 for Figure 7 Cross-sectional views at BB' and CC';

[0050] Figure 11 This is a schematic diagram of the structure of a first conductive mesh provided in an embodiment of this application;

[0051] Figure 12 This is a schematic diagram of the structure of yet another first conductive mesh provided in an embodiment of this application;

[0052] Figure 13 This is a schematic diagram of a touch layer layout provided in an embodiment of this application;

[0053] Figure 14 This is a schematic diagram of the winding of a touch layer provided in an embodiment of this application;

[0054] Figure 15 This is a schematic diagram of the winding of another touch layer provided in an embodiment of this application;

[0055] Figure 16 A schematic diagram of the winding of another touch layer provided in the embodiments of this application;

[0056] Figure 17 A mutual inductance curve diagram of a stylus at different positions on the display area is provided for an embodiment of this application;

[0057] Figure 18 A schematic diagram of the winding of another touch layer provided in the embodiments of this application;

[0058] Figure 19 A schematic diagram of the winding of another touch layer provided in the embodiments of this application;

[0059] Figure 20 A schematic diagram of the winding of another touch layer provided in the embodiments of this application;

[0060] Figure 21 A mutual inductance curve diagram for driving a stylus using different driving methods is provided in the embodiments of this application;

[0061] Figure 22 Another mutual inductance curve diagram for driving a stylus using a different driving method, provided in an embodiment of this application;

[0062] Figure 23 A mutual inductance curve diagram of a stylus at different positions on a display panel is provided as an embodiment of this application;

[0063] Figure 24 Mutual inductance curves of a stylus at different locations on the display panel, as provided in this embodiment of the application;

[0064] Figure 25This is a schematic diagram of the structure of another display panel provided in an embodiment of this application;

[0065] Figure 26 for Figure 25 A partial cross-sectional view at AA' in the diagram;

[0066] Figure 27 This is a schematic diagram illustrating the interaction between a stylus and a touch layer, provided as an embodiment of this application.

[0067] Figure 28 This is a schematic diagram illustrating another interaction between a stylus and a touch layer, provided as an embodiment of this application.

[0068] Figure 29 A structural block diagram showing the connection between a first coil, a switching device, and a differential sensing circuit, provided in an embodiment of this application;

[0069] Figure 30 An equivalent circuit diagram showing the connection between a first coil and a differential sensing circuit is provided in an embodiment of this application.

[0070] Figure 31 A structural block diagram showing the connection between a first coil, a switching device, and a differential drive circuit, provided in an embodiment of this application;

[0071] Figure 32 An equivalent circuit diagram showing the connection between a first coil and a differential drive circuit is provided in an embodiment of this application.

[0072] Figure 33 This is a schematic diagram of a first network and a third network provided in an embodiment of this application. Detailed Implementation

[0073] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art are within the protection scope of the embodiments of this application.

[0074] In the following description, the terms "first," "second," etc., are used for descriptive convenience only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0075] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "exemplary," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this application. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0076] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and regions is enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched regions shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0077] In the embodiments of this application, the words "exemplary" or "for example" are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0078] This application provides an electronic device, which may include mobile phones, tablets, laptops, handheld readers, etc. This application does not limit the electronic device.

[0079] An electronic device may include a mid-frame, a motherboard, a back cover, and a display panel. The mid-frame encloses an accommodating space, the back cover covers one side of the mid-frame, and the display panel covers the other side of the mid-frame to enclose the accommodating space. The motherboard is located within the accommodating space and is electrically connected to the display panel to control the display panel to display images.

[0080] Figure 1 This is a schematic diagram of the structure of a display panel 1000 provided in an embodiment of this application.

[0081] like Figure 1As shown in the embodiments of this application, the display panel 1000 may include a light-emitting layer 100 and a touch layer 200 stacked on the light-emitting layer 100. For example, the display panel may be an organic light-emitting diode (OLED) display panel, and correspondingly, the light-emitting layer 100 may include an organic light-emitting diode layer; of course, the display panel may also be a liquid crystal display (LCD) panel, and correspondingly, the light-emitting layer may include a backlight layer and a liquid crystal layer stacked on top of each other. The light-emitting layer provides backlight to the liquid crystal layer, and the liquid crystal layer controls the passage of light to achieve display. This application embodiment does not limit the light-emitting layer, as long as it can display images. In this application embodiment, the direction in which the light-emitting layer 100 and the touch layer 200 are stacked is taken as the stacking direction Z.

[0082] In addition to the light-emitting layer 100 and the touch layer 200 mentioned above, the display panel 1000 may also include a cover plate 30, a polarizer 40, and a heat dissipation layer 500 stacked on the light-emitting layer 100. Structurally, the cover plate is disposed on the light-emitting side of the light-emitting layer, the polarizer and the touch layer are both disposed between the cover plate and the light-emitting layer, the touch layer is disposed between the polarizer and the light-emitting layer, and the heat dissipation layer is disposed on the backlight side of the light-emitting layer.

[0083] For example, the heat dissipation layer 500 can be a copper foil tape (super composite film, abbreviated as SCF). Since copper foil has good thermal conductivity, using copper foil tape as the heat dissipation layer 500 can effectively achieve heat dissipation. The polarizer can control the polarization direction of light to improve the display effect. The touch layer can detect the user's touch actions to achieve touch detection.

[0084] Figure 2 This is a schematic diagram of a touch layer 200 provided in an embodiment of this application. Figure 3 This is a schematic diagram of a first metal layer 210 provided in an embodiment of this application.

[0085] The touch layer 200 may include a first metal layer 210 and a second metal layer 220 stacked together. For example... Figure 2 and Figure 3As shown, the first metal layer 210 includes a first network 211 and a second network 212, both extending along a first direction X and arranged along a second direction Y. The second metal layer 220 includes a third network 221 and a fourth network 222, both extending along the second direction Y and arranged along the first direction X. The first network 211 and the third network 221 are used for touch detection, while the second network 212 and the fourth network 222 are used for detecting stylus signals.

[0086] Touch detection can include detecting the user's finger touch on the display panel. For example, when the user's finger touches the display panel, the mutual capacitance value between the first network 211 and the third network 221 may change, and the sensor can then determine the location of the touch by sensing the minute current change caused by the change in mutual capacitance value.

[0087] The detection of a stylus pen can differ from touch detection. In one feasible implementation, the second network 212 and the fourth network 222 can each form a coil through circuit connections. When the stylus pen contacts the display panel, the coil within the stylus pen can undergo mutual inductance with the coils formed by the second network 212 and the fourth network 222, thereby utilizing the mutual inductance between the coils to achieve signal detection of the stylus pen by the display panel.

[0088] In the above embodiment, the first direction X is perpendicular to the second direction Y, and the stacking direction Z passes through the plane containing the first direction X and the second direction Y.

[0089] In this embodiment, by integrating the second network 212 and the fourth network 222 for detecting the stylus with the first network 211 and the third network 221 for touch detection within the touch layer 200, the increase in the thickness of the display panel caused by separately setting an electromagnetic film for the second network 212 and the fourth network 222 for detecting the stylus can be avoided, thereby reducing the thickness of the display panel and improving the layout utilization of the touch layer 200, thereby improving the integration of the internal structure of the display panel.

[0090] In addition, please continue to refer to Figure 2 and Figure 3In some examples, the first metal layer 210 may have multiple first networks 211 and multiple second networks 212, and these multiple first networks 211 and multiple second networks 212 may be arranged alternately along the second direction Y. Similarly, the second metal layer 220 may also have multiple third networks 221 and multiple fourth networks 222, and these multiple third networks 221 and multiple fourth networks 222 may be arranged alternately along the first direction X. For example, the layout shape of the first network 211, second network 212, third network 221, and fourth network 222 on the metal layer may be strip-shaped, or any other suitable shape.

[0091] This configuration increases the amount of touch signal, and the widths of the first and second strip networks 211 and 212 can be easily adjusted in the second direction Y, while the widths of the third and fourth strip networks 221 and 222 can be easily adjusted in the first direction X, thereby reducing the integrated resistance of each network.

[0092] In practical applications, the touch signal quantity can represent the difference between the mutual capacitance value of the first network 211 and the third network 221 when there is user touch on the display panel and the mutual capacitance value of the first network 211 and the third network 221 when there is no user touch on the display panel.

[0093] Figure 4 This is a schematic diagram of the structure of a first metal layer 210 provided in an embodiment of this application. Figure 5 This is a schematic diagram of the structure of a first initial metal mesh 300 provided in an embodiment of this application.

[0094] like Figure 4 As shown, in some embodiments, the first metal layer 210 may further include a first conductive mesh 213, which may include a plurality of first metal grids 215 arranged in an array, wherein each first metal grid 215 has a size of H1 in the second direction Y.

[0095] like Figure 4 and Figure 5As shown, in the fabrication process of the first metal layer 210, a first initial metal mesh 300 needs to be deposited. For example, the material of the first initial metal mesh 300 may include any suitable conductive material such as aluminum-titanium alloy. The first initial metal mesh 300 may include multiple third metal meshes 310, and each metal mesh 215 has a dimension H2 in the second direction Y. By breaking different positions on the first initial metal mesh 300, the first conductive mesh 213 can be fabricated and divided into a first network 211 and a second network 212. This allows different electrical signals to be applied to the first network 211 and the second network 212, thus achieving the division of different signal networks.

[0096] For example, the first network 211 after applying an electrical signal can serve as a touch driving network for touch detection, and the second network 212 after applying an electrical signal can serve as a stylus touch driving network; or, the first network 211 after applying an electrical signal can serve as a touch driving sensing network for touch detection, and the second network 212 after applying an electrical signal can serve as a stylus touch sensing network; or, the first network 211 after applying an electrical signal can serve as a touch driving network for touch detection, and the second network 212 after applying an electrical signal can serve as a stylus touch sensing network, etc., and this embodiment does not limit the scope of the application.

[0097] Furthermore, as a feasible implementation, the dimension H2 of the metal mesh 215 of the first initial metal mesh 300 in the second direction Y can be smaller than the dimension H1 of the first metal mesh 215 of the first conductive mesh 213 in the second direction Y. For example, H1 can be twice H2.

[0098] Please continue reading. Figure 4 The first metal layer 210 may further include a plurality of first conductive portions 214. Each first conductive portion 214 is stacked at an intersection of the first conductive mesh 213, and the first conductive portion 214 is closer to the second metal layer than the first conductive mesh 213.

[0099] Figure 6 This is a schematic diagram of the structure of a second initial metal mesh 400 provided in an embodiment of this application.

[0100] For example, in the process of preparing the first metal layer 210, a second initial metal mesh 400 may also be deposited. For example, the material of the second initial metal mesh 400 may include any suitable conductive material such as aluminum-titanium alloy. The second initial metal mesh 400 and the first initial metal mesh are stacked in the stacking direction Z, and the orthographic projection of the second initial metal mesh 400 along the stacking direction Z onto the light-emitting layer coincides with or nearly coincides with the orthographic projection of the first initial metal mesh along the stacking direction Z onto the light-emitting layer. Multiple first conductive portions 214 can be prepared by breaking different positions on the second initial metal mesh 400.

[0101] As one possible implementation, the orthographic projection of the fabricated first conductive portion 214 in the stacking direction Z can be in the shape of an "X" image and connected to the intersection point of the first conductive mesh 213. Alternatively, the orthographic projection of the fabricated first conductive portion 214 in the stacking direction Z can be any other suitable shape that is close to the shape of an "X" image, and this application embodiment does not impose specific limitations on this.

[0102] Based on the above preparation of the first metal layer 210, in some examples, the second metal layer 220 and the first metal layer 210 can be prepared in the same preparation process.

[0103] Figure 7 This is a schematic diagram of the structure of a touch layer 200 provided in an embodiment of this application.

[0104] Please continue reading. Figure 5 For example, after the first conductive mesh 213 is prepared by breaking different positions on the first initial metal mesh 300, the remaining first initial metal mesh 300 can serve as multiple second conductive portions 224 of the second metal layer 220. Similarly, after the multiple first conductive portions 214 are prepared by breaking different positions on the second initial metal mesh, the remaining second initial metal mesh can serve as the second conductive mesh of the second metal layer 220, and the desired result is obtained as follows. Figure 7 The schematic diagram shown illustrates that multiple second conductive parts 224 are electrically connected to the second conductive network.

[0105] With this configuration, the first metal layer 210 and the second metal layer 220 can be prepared by two initial metal meshes, which simplifies the preparation process of the first metal layer 210 and the second metal layer 220, reduces the preparation cost, and also reduces the height of the touch layer 200 obtained after preparation in the stacking direction, thereby improving the integration of the display panel.

[0106] Furthermore, by using the remaining first initial metal mesh 300 and the remaining second initial metal mesh as the second metal layer 220, the first initial metal mesh 300 and the second initial metal mesh can be fully utilized, thereby reducing the integration resistance of the first metal layer 210 and the second metal layer 220.

[0107] Figure 8 This is a schematic diagram of the structure of a second metal layer 220 provided in an embodiment of this application.

[0108] like Figure 7 and Figure 8 As shown, in some embodiments, the second conductive mesh 223 may include a plurality of second metal meshes 225 arranged in an array, wherein the first metal meshes 215 and the second metal meshes 225 are arranged alternately along the stacking direction Z, wherein the size of each first metal mesh 215 in the second direction Y is H3.

[0109] In this embodiment, by breaking different positions on the second conductive network 223, the second conductive network 223 can be divided into a third network 221 and a fourth network 222. In this way, different electrical signals can be applied to the third network 221 and the fourth network 222 to achieve the division of different signal networks.

[0110] For example, the third network 221 after applying an electrical signal can serve as a touch driving network for touch detection, and the fourth network 222 after applying an electrical signal can serve as a stylus touch driving network; or, the third network 221 after applying an electrical signal can serve as a touch sensing network for touch detection, and the fourth network 222 after applying an electrical signal can serve as a stylus touch sensing network; or, the third network 221 after applying an electrical signal can serve as a touch driving network for touch detection, and the fourth network 222 after applying an electrical signal can serve as a stylus touch sensing network, etc., and this application embodiment does not limit this.

[0111] Furthermore, as a feasible implementation, the dimension H1 of the first metal mesh 215 of the first conductive mesh 213 in the second direction Y can be equal to or approximately equal to the dimension H3 of the second metal mesh 225 of the second conductive mesh 223 in the second direction Y. Here, "approximately equal" means that there can be a slight difference between H1 and H3.

[0112] This arrangement ensures the uniformity of the layout between the first conductive mesh 213 and the second conductive mesh 223, thereby improving the uniformity and stability of touch operation at different locations on the display panel.

[0113] Please continue reading. Figure 5 and Figure 7 Each of the second conductive portions 224 (not shown in the figure, please refer to...) Figure 8The first conductive layer 224 is stacked at one intersection of the second conductive mesh 223 and is closer to the first metal layer 210 than the second conductive mesh 223. Each second conductive layer 224 is located within a first metal mesh 215, and each second metal mesh 225 contains one first conductive layer 214 (not shown in the figure, please refer to [reference]). Figure 4 ).

[0114] This configuration can further reduce the distance between the first metal layer 210 and the second metal layer 220 in the stacking direction Z, thereby reducing the thickness of the touch layer where the first metal layer 210 and the second metal layer 220 are located in the stacking direction Z, and thus reducing the thickness of the entire display panel in the stacking direction Z, and can also improve the integration of the internal structure of the display panel.

[0115] In addition, this configuration can reduce the capacitance between the first network 211 and the third network 221, as well as between the second network 212 and the fourth network 222, thereby reducing drive power consumption.

[0116] As one feasible implementation, the orthographic projection of the fabricated second conductive portion 224 in the stacking direction Z can be in the shape of an "X" image and connected to the intersection of the second conductive mesh 223. Alternatively, the orthographic projection of the fabricated second conductive portion 224 in the stacking direction Z can be any other suitable shape similar to the "X" image shape, and this application embodiment does not impose specific limitations on this.

[0117] In the above embodiments, the touch layer includes two initial metal meshes as an example to briefly describe the structure and preparation process of the first metal layer 210 and the second metal layer 220. In other examples, the touch layer may also include other numbers of initial metal meshes, and the first metal layer 210 and the second metal layer 220 may be prepared in different processes. This application does not limit the scope of the embodiments.

[0118] Figure 9 A film layer diagram of a display panel 1000 provided in an embodiment of this application. Figure 10 for Figure 7 Cross-sectional views at BB' and CC'.

[0119] like Figure 9 and Figure 10As shown, in one feasible implementation, when preparing the second initial metal mesh based on the first initial metal mesh, an insulating structure 600 can be pre-prepared on the first initial metal mesh to provide partial isolation between the subsequently prepared second initial metal mesh and the first initial metal mesh. For example, the insulating structure 600 can be distributed at overlapping positions between the first conductive mesh 213 on the first initial metal mesh and the second conductive mesh 223 on the second initial metal mesh, thereby achieving isolation between the first conductive mesh 213 and the second conductive mesh 223, and improving the reliability and stability of the first conductive mesh 213 and the second conductive mesh 223.

[0120] Figure 11 This is a schematic diagram of the structure of a first conductive mesh 213 provided in an embodiment of this application.

[0121] like Figure 11 As shown, in some embodiments, the first metal mesh 215 may be circular or near-circular (e.g., elliptical); in other embodiments, the first metal mesh 215 may also be any other suitable shape such as a rounded rectangle.

[0122] Similarly, the second metal mesh can also be circular or near-circular (e.g., elliptical); or it can be any other suitable shape such as a rounded rectangle.

[0123] This configuration increases the width of the metal wires at the corners of the metal meshes within the first conductive mesh 213 and the second conductive mesh, thereby reducing the channel resistance of the first conductive mesh 213 and the second conductive mesh formed by the metal wires.

[0124] Figure 12 This is a schematic diagram of the structure of another first conductive mesh 213 provided in the embodiments of this application.

[0125] like Figure 12 As shown, in some embodiments, at least one first metal mesh 215 has an open pattern projected onto the light-emitting layer.

[0126] Here, "open pattern" refers to the presence of breaks in the metal lines of the first conductive mesh 213 that form the first metal grid 215. For example, the break can be located at an overlap between the first conductive mesh 213 and the second conductive mesh 223, or it can be located at any other suitable position.

[0127] This configuration reduces the number of overlapping positions between the first conductive mesh 213 and the second conductive mesh 223, thereby reducing the parasitic capacitance between the first network 211 and the second network 212 and the third network 221 and the fourth network 222, and thus reducing driving power consumption, thereby improving the performance of the display panel.

[0128] Similarly, the orthogonal projection of at least one second metal mesh onto the light-emitting layer can also be an open pattern, which helps to reduce the number of overlapping positions between the first conductive mesh 213 and the second conductive mesh 223, thereby reducing the parasitic capacitance between the first conductive mesh 213 and the second conductive mesh 223.

[0129] For example, the number of breakpoints mentioned above can be one or more, and this embodiment of the application does not limit this.

[0130] Figure 13 This is a schematic diagram of the layout of a touch layer 200 provided in an embodiment of this application.

[0131] like Figure 13 As shown, in some embodiments, the first metal layer 210 may include a plurality of first channels 216, which extend along a first direction X and are arranged at intervals along a second direction Y. The second metal layer 220 may include a plurality of second channels 226, which are stacked along a stacking direction Z, with the second channels 226 extending along a second direction Y and the plurality of second channels 226 arranged at intervals along the first direction X.

[0132] Each first channel 216 may include at least one second network 212. For example, if there are multiple second networks 212 within a first channel 216, each second network 212 may be led out via a lead wire, and the lead wires of multiple second networks 212 may form a wire harness. Similarly, each second channel 226 may include at least one fourth network 222. If there are multiple fourth networks 222 within a second channel 226, each fourth network 222 may be led out via a lead wire, and the lead wires of multiple fourth networks 222 may form a wire harness.

[0133] In cases where there are multiple second networks 212 within a first channel 216, the number of second networks 212 led out via a single lead-out line can be any suitable number, such as 1, 2, or 3. This embodiment of the application does not impose any restrictions on this.

[0134] This configuration improves the flexibility of the second network 212 and, by adjusting the number of second networks 212 led out through a single lead, reduces the integrated resistance of the led-out lines, thereby reducing line losses and improving the performance of the display panel.

[0135] Figure 14 This is a schematic diagram of the wiring of a touch layer 200 provided in an embodiment of this application. Figure 15 This is a schematic diagram of the wiring of another touch layer 200 provided in an embodiment of this application. Figure 16 This is a schematic diagram of the winding of another touch layer 200 provided in an embodiment of this application.

[0136] like Figure 14 As shown, the wire harnesses of any two first channels 216 can be connected to form a single-turn first coil 610, thereby enabling the extraction of multiple second networks 212. Similarly, the wire harnesses of any two second channels 226 can be connected to form a single-turn second coil 320, thereby enabling the extraction of multiple fourth networks 222.

[0137] With this configuration, the display panel can drive and sense the stylus by connecting a driving circuit or a sensing circuit to the two ends of the first coil 610 and the second coil 320.

[0138] In this configuration, there can be 2N1 first channels 216 between the two first channels 216 connected by the first coil 610, and there can be 2N1 second channels 226 between the two second channels 226 connected by the second coil 320. For example, N1 can take any suitable value such as 0, 1, 2, 3, 4, 5, etc.

[0139] For example, in the scenario where N1 is 1, we can obtain the following: Figure 14 The diagram shows a winding pattern. In this scenario, if the width of a single first channel 216 in the first direction X is h, then the width of the first coil 610 is 2h. With N1 set to 2, the following can be obtained: Figure 15 The winding diagram shown illustrates that, in this scenario, the width of the first coil 610 is 4h; with N1 set to 3, the following can be obtained: Figure 16 The winding diagram shown in this scenario indicates that the width of the first coil 610 is 3h.

[0140] Table 1 shows the simulation data of a single first coil and a single second coil in the scenario of preparing a first metal layer and a second metal layer using a first initial metal mesh with a thickness of 0.4 μm and a second initial metal mesh with a thickness of 0.6 μm.

[0141] Table 1

[0142]

[0143] As shown in Table 1, in this embodiment, the coil resistance of the first coil is 155Ω and the coil resistance of the second coil is 80Ω, both exhibiting relatively low integrated resistance. Therefore, the display panel of this embodiment can achieve a reduction in integrated resistance while increasing integration density.

[0144] Figure 17 This application provides a mutual inductance curve diagram of a stylus at different positions on the display area.

[0145] like Figure 17 As shown, by adjusting the number of N1 coils, the widths of the first and second coils can be adjusted, thereby controlling the mutual inductance curve between the stylus and the touch layer. By properly configuring the widths of the first and second coils, the driving strength of the coils within the touch layer on the stylus can be increased, and the uniformity and resolution of the stylus's movement at different locations can also be improved.

[0146] Figure 18 This is a schematic diagram of the winding of another touch layer 200 provided in an embodiment of this application. Figure 19 This is a schematic diagram of the winding of another touch layer 200 provided in an embodiment of this application. Figure 20 This is a schematic diagram of the winding of another touch layer 200 provided in an embodiment of this application.

[0147] like Figure 18 As shown, in some other embodiments, the wiring harnesses of any four of the plurality of first channels 216 can be connected to form a two-turn third coil 330, thereby enabling the extraction of the second network 212 within the four first channels 216. Similarly, the wiring harnesses of any four of the plurality of second channels 226 can be connected to form a two-turn fourth coil 340, thereby enabling the extraction of the fourth network 222 within the four second channels 226.

[0148] With this configuration, the display panel can drive and sense the stylus by connecting a driving circuit or a sensing circuit to the two ends of the third coil 330 and the fourth coil 340.

[0149] Among the four first channels 216 connected by the third coil 330, there can be 2N2 first channels 216 between the two first channels 216 set close to the sides along the second direction Y, and there can be 2N3 first channels 216 between the two first channels 216 set close to the middle along the second direction Y.

[0150] In the four second channels 226 connected by the fourth coil 340, there can be 2N2 second channels 226 between two second channels 226 set near the sides along the first direction X, and there can be 2N3 second channels 226 between two second channels 226 set near the middle along the first direction X.

[0151] For example, N2 and N3 can both take any suitable value such as 0, 1, 2, 3, 4, 5, etc., and the value of N2 is different from the value of N3.

[0152] For example, in the scenario where N2 is 3 and N3 is 2, we can obtain the following: Figure 18 The diagram shown illustrates the winding process; under the condition that N2 is 3 and N3 is 1, the following can be obtained: Figure 19 The diagram shown illustrates the winding process; with N2 equal to 5 and N3 equal to 4, the following can be obtained: Figure 20 The diagram shown is a schematic of the winding.

[0153] Figure 21 This application provides a mutual inductance curve diagram for driving a stylus using different driving methods, as shown in the embodiments of this application. Figure 22 The mutual inductance curve of another stylus driven by a different driving method is provided in the embodiments of this application.

[0154] in, Figure 21 The mutual inductance curve between the stylus and the coil corresponds to the first coil and the second coil in the display area, that is, when the coil is a single-turn coil, and the stylus is driven by three driving methods. Figure 22 The mutual inductance curve between the stylus and the coil corresponds to the third and fourth coils in the display area, that is, when the coil is a double-turn coil, and the stylus is driven by three driving methods.

[0155] For example, since there can be multiple coils (e.g., a first coil and a second coil, or a third coil and a fourth coil), and these multiple coils can be arranged sequentially along a first direction X and a second direction Y, when multiple coils are supplied with current in the same direction, the mutual inductance between the stylus and the coils will have both positive and negative values ​​when the stylus is at different positions on the display panel. In this embodiment, curve 1 is a mutual inductance curve when different directions of current (e.g., positive or negative current) are supplied to different coils, so that the mutual inductance between the stylus and the coils is positive when the stylus is at different positions on the display panel. Curve 2 is a mutual inductance curve between the stylus and the coils when the stylus is centered at the position on the display panel and drives 7 coils near the stylus. Curve 3 is a mutual inductance curve between the stylus and the coils when the stylus is centered at the position on the display panel and drives 5 coils near the stylus.

[0156] like Figure 21 and Figure 22 As shown, the mutual inductance between the stylus and the coil is lower when using a single-turn coil than when using a double-turn coil. This indicates that the driving signal strength of the double-turn coil is greater.

[0157] Figure 23 This application provides a mutual inductance curve diagram of a stylus at different positions on a display panel. Figure 24 Mutual inductance curves of another stylus at different positions on the display panel, as provided in this application embodiment.

[0158] in, Figure 23 The mutual inductance curves between the coils at different locations on the display panel and the stylus correspond to the first coil and the second coil within the display area, i.e., when the coils are single-turn coils. Figure 24 The diagram shows the mutual inductance curves between the coils at different locations on the display panel and the stylus when the coils in the display area include the third and fourth coils, i.e., when they are double-turn coils.

[0159] like Figure 23 and Figure 24 As shown, the peak density between the mutual inductance curves of a single-turn coil and a stylus at different positions is greater than that between the mutual inductance curves of a double-turn coil and a stylus at different positions. Therefore, the resolution of a single-turn coil is higher than that of a double-turn coil.

[0160] In practical applications, properly configuring the number of coil turns and the coil width can enhance the driving strength of the coil in the touch layer for the stylus, and also improve the uniformity and resolution of the stylus's driving at different positions.

[0161] Furthermore, through comparison Figure 23 and Figure 24 As can be seen from the slope of the mutual inductance curve, the slope of the mutual inductance curve of the double-turn coil is more stable, that is, the linearity of the double-turn coil is better. By adjusting the values ​​of N2 and N3 of the double-turn coil, the slope of the mutual inductance curve can be better adjusted, thereby improving the linearity of the display panel in detecting the coordinates of the stylus on the display panel.

[0162] Figure 25 This is a schematic diagram of the structure of another display panel 1000 provided in an embodiment of this application. Figure 26 for Figure 25 A partial cross-sectional view at AA' in the diagram.

[0163] like Figure 25 and Figure 26As shown, in some embodiments, the display panel 1000 further includes a display area 230 and an edge area 240, with a touch layer disposed within the display area 230 and the edge area 240 surrounding the display area 230. The edge area 240 includes a blocking plate 241 and a lead-out area 242. The blocking plate 241 is disposed on both sides of the display area 230 along a first direction X, and the lead-out area 242 is disposed between the blocking plate 241 and the display area 230.

[0164] The edge region may include a first compensation channel 243, which may be disposed between the baffle plate 241 and the lead-out area 242; alternatively, the first compensation channel 243 may be stacked on the baffle plate 241; or, the first compensation channel 243 may be disposed on the baffle plate 241 and between the baffle plate 241 and the lead-out area 242. The first compensation channel 243 extends along the second direction Y and is connected to the second channel.

[0165] Figure 27 This is a schematic diagram illustrating the interaction between a stylus and a touch layer, provided as an embodiment of this application. Figure 28 This is a schematic diagram illustrating another interaction between a stylus and a touch layer, provided as an embodiment of this application.

[0166] like Figure 27 and Figure 28 As shown, in practical applications, regardless of the winding method of the touch layer 200, when the stylus is in emission mode, the current in the coils within the touch layer 200 (e.g., the first coil 610 and the second coil 320, or the third coil 330 and the fourth coil 340) generates a magnetic field, which in turn drives the coils within the stylus to resonate through mutual inductance. Figure 28 As shown, when the stylus is in receiving mode, the remaining energy in the stylus coil continues to oscillate, thereby inducing voltage or current in the coil of the touch layer 200. The induced current received by the coil of the touch layer 200 is related to the relative position of the stylus on the display panel, thereby obtaining the position of the stylus.

[0167] However, when the stylus is located near the edge of the display panel, since there is no first and second channel in the edge area, the display panel's ability to drive the stylus is poor and the signal strength for sensing the stylus is also low.

[0168] Please continue reading. Figure 26By setting a first compensation channel 243 within the edge area, when the stylus approaches the edge area 240, the current direction of the coil containing the first compensation channel 243 can be controlled, thereby improving the display panel's driving capability for the stylus and increasing the signal strength for sensing the stylus. Furthermore, this arrangement also improves the space utilization within the touch layer 200, increasing the device density of the internal components while maintaining the same thickness.

[0169] In some other embodiments, the edge region 240 further includes a second compensation channel 244, which is disposed on at least one side of the display area 230 along a second direction Y, extends along a first direction X, and is connected to the first channel 223.

[0170] Similarly, by providing a second compensation channel 244 on one side of the display area 230 in the second direction Y, the driving capability of the display panel for the stylus can be improved when the stylus is close to the side of the display panel in the second direction Y, and the signal strength of the stylus can be increased.

[0171] Figure 29 This is a structural block diagram illustrating the connection between a first coil 610, a switching device 700, and a differential sensing circuit 800, as provided in an embodiment of this application. Figure 30 An equivalent circuit diagram showing the connection between a first coil 610 and a differential sensing circuit 800, provided in an embodiment of this application. Figure 31 This is a structural block diagram illustrating the connection between a first coil 610, a switching device 700, and a differential drive circuit 900, as provided in an embodiment of this application. Figure 32 An equivalent circuit diagram showing the connection between a first coil 610 and a differential drive circuit 900, provided in an embodiment of this application.

[0172] like Figure 29 , Figure 30 and Figure 31 As shown, in some embodiments, the display panel further includes: a switching device 700, a differential sensing circuit 800, and a differential driving circuit 900, wherein the differential sensing circuit 800 includes an operational amplifier 510. The switching device 700, operational amplifier 510, and differential driving circuit 900 all include a first input terminal and a second input terminal. The switching device 700 also includes a first output terminal and a second output terminal. One end of the first coil 610 is connected to the first input terminal of the switching device 700, and the other end of the first coil 610 is connected to the second input terminal of the switching device 700. The first output terminal of the switching device 700 is connected to the first input terminal of the operational amplifier 510, and the second output terminal of the switching device 700 is connected to the second input terminal of the operational amplifier 510. Alternatively, as... Figure 32As shown, the first output terminal of the switching device 700 is connected to the first input terminal of the differential drive circuit 900, and the second output terminal of the switching device 700 is connected to the second input terminal of the differential drive circuit 900.

[0173] In this embodiment of the application, the switching device 700 can be used to switch the line between the differential sensing circuit 800 and the differential driving circuit 900 connected to the first coil.

[0174] For example, the switching device 700 may include a first switch selector and a second switch selector, thereby switching the connection of one end of the first coil 610 to the first input terminal of the differential drive circuit 900 or the first input terminal of the operational amplifier 510 via the first switch selector, and switching the connection of the other end of the first coil 610 to the second input terminal of the differential drive circuit 900 or the second input terminal of the operational amplifier 510 via the second switch selector.

[0175] In other examples, the switching device 700 may also employ a switching chip with selective switching function to integrate the first switch selector and the second switch selector, thereby simplifying the device structure and improving the integration of the display panel.

[0176] This configuration allows interference signals to enter the differential sensing circuit 800 via the first input terminal 511 and the second input terminal 512 when the first coil 610 is affected by other signals. The operational amplifier 510 then cancels out the interference signals, thereby improving the signal-to-noise ratio of the differential sensing circuit 800 connected to the first coil 610. Similarly, when the switching device 700 switches, the differential driving circuit 900 can also be connected to the first coil 610 differentially, thereby improving the signal-to-noise ratio of the differential driving circuit 900 when driving the first coil 610.

[0177] For example, sources of interference signals may include various sources such as the effect of parasitic capacitance on bandwidth.

[0178] In some examples, the first input terminal of the switching device 700 may also be connected to one end of the second coil, and the second input terminal of the switching device 700 may also be connected to the other end of the second coil. Alternatively, the first input terminal of the switching device 700 may be connected to one end of the third coil, and the second input terminal of the switching device 700 may be connected to the other end of the third coil. Or, the first input terminal of the switching device 700 may be connected to one end of the fourth coil, and the second input terminal of the switching device 700 may be connected to the other end of the fourth coil. Since the connection methods of other coils to the switching device 700, the differential sensing circuit 800, and the differential driving circuit 900 are the same as or similar to the connection methods of the first coil to the switching device 700, the differential sensing circuit 800, and the differential driving circuit 900, these will not be described in detail in the embodiments of this application.

[0179] Furthermore, the first coil, second coil, third coil, and fourth coil within the touch layer 200 can each be connected to a switching device 700. Through the switching device 700, in addition to the first coil, the second coil, third coil, and fourth coil can also be connected to a corresponding differential sensing circuit or differential driving circuit to remove interference signals from the second coil, third coil, and fourth coil, thereby improving the signal-to-noise ratio of the differential sensing circuit or differential driving circuit connected to the first coil, second coil, third coil, and fourth coil.

[0180] Figure 33 This is a schematic diagram of a first network 211 and a third network 221 provided in an embodiment of this application.

[0181] like Figure 33 As shown, in some embodiments, the first network 211 includes a plurality of first network units 410 and a plurality of second network units 420. The first network units 410 and the second network units 420 are arranged alternately along a first direction X, and the first network units 410 and the second network units 420 are connected.

[0182] The area of ​​the orthographic projection of the first network unit 410 onto the light-emitting layer is larger than the area of ​​the orthographic projection of the second network unit 420 onto the light-emitting layer, and the orthographic projection of the second network unit 420 onto the light-emitting layer overlaps with the orthographic projection of the third network 221 onto the light-emitting layer at least partially.

[0183] Please continue reading. Figure 33 In some embodiments, the third network 221 includes a plurality of third network units 430 and a plurality of fourth network units 440. The third network units 430 and the fourth network units 440 are arranged alternately along the second direction Y, and the third network units 430 and the fourth network units 440 are connected.

[0184] The area of ​​the orthographic projection of the third network unit 430 onto the light-emitting layer is greater than the area of ​​the orthographic projection of the fourth network unit 440 onto the light-emitting layer, and the orthographic projection of the fourth network unit 440 onto the light-emitting layer overlaps with the orthographic projection of the second network unit 211 onto the light-emitting layer at least partially.

[0185] This configuration reduces the overlap area between the first network 211 and the second network 212 in the stacking direction Z, thereby reducing the parasitic capacitance between the first network 211 and the second network 212 and improving the accuracy of touch detection of the display panel.

[0186] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display panel, characterized in that, include: A light-emitting layer, and a touch layer stacked on the light-emitting layer, the touch layer comprising a first metal layer and a second metal layer stacked on top of each other; The first metal layer includes a first network and a second network, both extending along a first direction and arranged along a second direction; the second metal layer includes a third network and a fourth network, both extending along the second direction and arranged along the first direction. The first network and the third network are used for touch detection, and the second network and the fourth network are used for detecting stylus signals; the first direction is perpendicular to the second direction, and the stacking direction passes through the plane containing the first direction and the second direction.

2. The display panel according to claim 1, characterized in that, The first metal layer further includes a first conductive mesh and a plurality of first conductive portions. The first conductive mesh includes a plurality of first metal grids arranged in an array. Each first conductive portion is stacked at an intersection of the first conductive mesh, and the first conductive portion is closer to the second metal layer than the first conductive mesh. The first conductive mesh includes the first network and the second network.

3. The display panel according to claim 2, characterized in that, The second metal layer further includes a second conductive mesh and a plurality of second conductive portions. The second conductive mesh includes a plurality of second metal grids arranged in an array. The first metal grid and the second metal grid are staggered along the stacking direction. Each second conductive portion is stacked at an intersection of the second conductive mesh. The second conductive portion is closer to the first metal layer than the second conductive mesh, and each second conductive portion is located within a first metal grid. Each second metal grid contains one first conductive portion. The second conductive network includes the third network and the fourth network.

4. The display panel according to claim 3, characterized in that, The first metal mesh is circular, near-circular, or rounded rectangle; and / or, the second metal mesh is circular, near-circular, or rounded rectangle.

5. The display panel according to claim 3 or 4, characterized in that, At least one of the first metal meshes has an open pattern when projected onto the light-emitting layer; at least one of the second metal meshes has an open pattern when projected onto the light-emitting layer.

6. The display panel according to claim 1, characterized in that, The first metal layer further includes a plurality of first channels, each first channel including at least one second network, and the first channels extend along the first direction, with the plurality of first channels arranged at intervals along the second direction; The second metal layer includes a plurality of second channels, the first channel and the second channel are stacked along the stacking direction, the second channel includes at least one of the fourth networks, and the second channel extends along the second direction, and the plurality of second channels are arranged at intervals along the first direction; In this configuration, any two of the multiple first channels constitute a first coil, and there are 2N1 first channels between the two first channels connected to the first coil; any two of the multiple second channels constitute a second coil, and there are 2N1 second channels between the two second channels connected to the second coil.

7. The display panel according to claim 1, characterized in that, The first metal layer further includes a plurality of first channels, each first channel including at least one second network, and the first channels extend along the first direction, with the plurality of first channels arranged at intervals along the second direction; The second metal layer includes a plurality of second channels, the first channel and the second channel are stacked along the stacking direction, the second channel includes at least one of the fourth networks, and the second channel extends along the second direction, and the plurality of second channels are arranged at intervals along the first direction; In this configuration, any four of the multiple first channels constitute a third coil, and among the four first channels connected to the third coil, there are 2N2 first channels between two first channels arranged near the sides along the second direction, and 2N3 first channels between two first channels arranged near the middle along the second direction; any four of the multiple second channels constitute a fourth coil, and among the four second channels connected to the fourth coil, there are 2N2 second channels between two second channels arranged near the sides along the first direction, and 2N3 second channels between two second channels arranged near the middle along the first direction.

8. The display panel according to claim 6 or 7, characterized in that, The display panel further includes a display area and an edge area. The touch layer is disposed within the display area, and the edge area surrounds the display area. The edge area includes a blocking plate and a lead-out area. The blocking plate is disposed on both sides of the display area along the first direction, and the lead-out area is disposed between the blocking plate and the display area. The edge region includes a first compensation channel, which is disposed between the baffle plate and the lead-out area, and / or the first compensation channel is stacked on the baffle plate, the first compensation channel extends along the second direction, and the first compensation channel is connected to the second channel.

9. The display panel according to claim 8, characterized in that, The edge area further includes a second compensation channel, which is disposed on at least one side of the display area along the second direction, extends along the first direction, and is connected to the first channel.

10. The display panel according to claim 6, characterized in that, The display panel further includes: a switching device, a differential sensing circuit, and a differential driving circuit, wherein the differential sensing circuit includes an operational amplifier; The switching device, the operational amplifier, and the differential driving circuit all include a first input terminal and a second input terminal, and the switching device also includes a first output terminal and a second output terminal. One end of the first coil is connected to the first input terminal of the switching device, and the other end of the first coil is connected to the second input terminal of the switching device; The first output terminal of the switching device is connected to the first input terminal of the operational amplifier, and the second output terminal of the switching device is connected to the second input terminal of the operational amplifier; or, the first output terminal of the switching device is connected to the first input terminal of the differential driving circuit, and the second output terminal of the switching device is connected to the second input terminal of the differential driving circuit.

11. The display panel according to claim 7, characterized in that, The display panel further includes: a switching device, a differential sensing circuit, and a differential driving circuit, wherein the differential sensing circuit includes an operational amplifier; The switching device, the operational amplifier, and the differential driving circuit all include a first input terminal and a second input terminal, and the switching device also includes a first output terminal and a second output terminal. One end of the third coil is connected to the first input terminal of the switching device, and the other end of the third coil is connected to the second input terminal of the switching device; The first output terminal of the switching device is connected to the first input terminal of the operational amplifier, and the second output terminal of the switching device is connected to the second input terminal of the operational amplifier; or, the first output terminal of the switching device is connected to the first input terminal of the differential driving circuit, and the second output terminal of the switching device is connected to the second input terminal of the differential driving circuit.

12. The display panel according to any one of claims 1-4, 6-7, and 9-11, characterized in that, The first network includes a plurality of first network units and a plurality of second network units, the first network units and the second network units are arranged alternately along the first direction, and the first network units and the second network units are connected. Wherein, the area of ​​the orthographic projection of the first network unit on the light-emitting layer is greater than the area of ​​the orthographic projection of the second network unit on the light-emitting layer; and the orthographic projection of the second network unit on the light-emitting layer overlaps with the orthographic projection of the third network on the light-emitting layer at least partially.

13. The display panel according to claim 12, characterized in that, The third network includes a plurality of third network units and a plurality of fourth network units, the third network units and the fourth network units are arranged alternately along the second direction, and the third network units are connected to the fourth network units; The area of ​​the orthographic projection of the third network unit on the light-emitting layer is larger than the area of ​​the orthographic projection of the fourth network unit on the light-emitting layer, and the orthographic projection of the fourth network unit on the light-emitting layer overlaps with the orthographic projection of the second network unit on the light-emitting layer at least partially.

14. An electronic device, characterized in that, include: The middle frame, the back cover, and the display panel according to any one of claims 1-13, wherein the middle frame encloses an accommodating space, the back cover covers one side of the middle frame, and the display panel covers the other side of the middle frame.

Images