Display panel and display device

Abstract

The utility model discloses a display panel and a display device. The display panel comprises a substrate, a light-emitting device layer, a packaging layer, a first touch layer, an insulating layer and a second touch layer. The substrate comprises a display area and a non-display area arranged on at least one side of the display area. The light-emitting device layer, the packaging layer and the first touch layer are sequentially arranged on the substrate in a stacked mode. The first touch layer comprises an auxiliary electrode wire located in the non-display area. The insulating layer includes a first via and a second via. The second touch layer is arranged on the side, away from the first touch layer, of the insulating layer and comprises a touch electrode wire and a first bonding pad which are located in the non-display area, one end of the touch electrode wire is electrically connected with the first bonding pad, and the touch electrode wire and the auxiliary electrode wire are stacked and electrically connected through a first via hole; one of the first touch layer and the second touch layer comprises a touch electrode, the other of the first touch layer and the second touch layer comprises a bridging part, the bridging part is electrically connected with the touch electrode through a second via hole, and the touch electrode is electrically connected with the other end of the touch electrode wire.

Description

Technical Field

[0001] This disclosure belongs to the field of display technology, and in particular relates to a display panel and a display device. Background Technology

[0002] With the continuous development of display technology, display panels typically incorporate touch functionality. Touch panels can be categorized into resistive and capacitive types. Capacitive touch panels are widely used due to their low cost, ability to achieve true multi-touch, and fast response speed. Currently, touch display technology for Organic Light-Emitting Diode (OLED) display panels has evolved from external touchpads to direct integration onto the display panel, and from mutual capacitance touch technology to self-capacitive touch technology. Mutual capacitance touch panels exhibit a larger RC delay compared to self-capacitive touch panels, and the parasitic capacitance of mutual capacitance touch panels increases exponentially with the size of the touch panel, while the parasitic capacitance of self-capacitive touch panels remains almost constant. Utility Model Content

[0003] This disclosure provides a display panel and display device that reduce the load (resistance) of the touch electrode lines, thereby improving the transmission efficiency of touch signals.

[0004] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0005] This disclosure provides a display panel, including:

[0006] A substrate, comprising a display area and a non-display area disposed on at least one side of the display area;

[0007] A light-emitting device layer is disposed on one side of the substrate.

[0008] An encapsulation layer is disposed on the side of the light-emitting device layer away from the substrate.

[0009] A first touch layer is disposed on the side of the encapsulation layer away from the light-emitting device layer, and includes auxiliary electrode lines located in the non-display area;

[0010] An insulating layer is disposed on the side of the first touch layer away from the encapsulation layer, the insulating layer including a first via located in the non-display area and a second via located in the display area;

[0011] The second touch layer is disposed on the side of the insulating layer away from the first touch layer, and includes a touch electrode line and a first pad located in the non-display area. One end of the touch electrode line is electrically connected to the first pad. The touch electrode line and the auxiliary electrode line are stacked and electrically connected through the first via.

[0012] The first touch layer and the second touch layer each include a touch electrode and a bridging portion. The bridging portion is electrically connected to the touch electrode through a second via, and the touch electrode is electrically connected to the other end of the touch electrode line.

[0013] Optionally, in the target direction, the width of the touch electrode line is smaller than the width of the first pad, and the target direction is parallel to the substrate and perpendicular to the extension direction of the touch electrode line;

[0014] The orthographic projection of the side step of the auxiliary electrode line near the first pad on the substrate is located within the orthographic projection of the first pad on the substrate.

[0015] The auxiliary electrode line includes a main body and an extension that are electrically connected to each other. The extension is closer to the first pad than the main body, and the extension includes the side step.

[0016] The main body and the touch electrode line are stacked and electrically connected through the first via, and the orthographic projection of the extension on the substrate is located within the orthographic projection of the first pad on the substrate.

[0017] In the extending direction of the touch electrode line, the width of the extension is greater than or equal to 2 μm.

[0018] Optionally, the touch electrode line includes a second ramp portion that covers the side step of the auxiliary electrode line near the first pad.

[0019] The orthogonal projection of the auxiliary electrode line on the substrate lies within the orthogonal projection of the touch electrode line on the substrate.

[0020] Optionally, in the target direction, the width of the auxiliary electrode line is smaller than the width of the touch electrode line, and the target direction is parallel to the substrate and perpendicular to the extension direction of the touch electrode line.

[0021] Optionally, the orthographic projection of the auxiliary electrode line on the substrate is a first projection area, the first projection area including a first edge and a second edge, and the orthographic projection of the touch electrode line on the substrate is a second projection area, the second projection area including a third edge and a fourth edge, the first edge, the second edge, the third edge and the fourth edge extending along the extension direction of the touch electrode line;

[0022] The distance between the first edge and the third edge is greater than or equal to 2 μm, and / or the distance between the second edge and the fourth edge is greater than or equal to 2 μm.

[0023] Optionally, the first touch layer further includes: a second pad located in the non-display area, the second pad being electrically connected to the auxiliary electrode line;

[0024] The insulating layer further includes a third via, wherein the second pad is stacked on top of the first pad and electrically connected through the third via.

[0025] Optionally, it also includes:

[0026] A support layer is disposed on the side of the first touch layer away from the insulating layer and located in the non-display area. The orthographic projection of the support layer on the substrate at least partially overlaps with the orthographic projection of the first pad on the substrate, and the orthographic projection of the support layer on the substrate at least partially overlaps with the orthographic projection of the auxiliary electrode line on the substrate.

[0027] Optionally, the first pad includes a first ramp portion that covers a side step of the auxiliary electrode line near the end of the first pad, and the orthographic projection of the first ramp portion on the substrate lies within the orthographic projection of the support layer on the substrate; or

[0028] The touch electrode line includes a second ramp portion, which covers the side step of the auxiliary electrode line near the first pad. The orthographic projection of the second ramp portion on the substrate is located within the orthographic projection of the support layer on the substrate.

[0029] Optionally, the orthographic projection of the side step on the substrate lies within the orthographic projection of the support layer on the substrate.

[0030] Optionally, it also includes:

[0031] A source / drain metal layer is disposed on the side of the first touch layer away from the insulating layer and located in the display area. The source / drain metal layer is disposed in the same layer as the support layer.

[0032] Optionally, it also includes:

[0033] A cover layer is disposed on the side of the second touch layer away from the insulating layer;

[0034] The touch electrode line includes a second ramp portion that covers the side step of the auxiliary electrode line near the first pad. The orthographic projection of the second ramp portion on the substrate is located within the orthographic projection of the cover layer on the substrate, and / or the orthographic projection of the side step on the substrate is located within the orthographic projection of the cover layer on the substrate.

[0035] Optionally, the touch electrode includes a plurality of first touch electrodes along a first direction and a second touch electrode along a second direction, the first direction intersecting the second direction, and adjacent first touch electrodes being electrically connected through the bridging portion, or adjacent second touch electrodes being electrically connected through the bridging portion;

[0036] The touch electrode line includes a first touch electrode line and a second touch electrode line. The first pad includes a first sub-pad and a second sub-pad. One end of the first touch electrode line is electrically connected to the first touch electrode, and the other end of the first touch electrode line is electrically connected to the first sub-pad. One end of the second touch electrode line is electrically connected to the second touch electrode line, and the other end of the second touch electrode line is electrically connected to the second sub-pad.

[0037] The auxiliary electrode line includes a first auxiliary electrode line and a second auxiliary electrode line. The first auxiliary electrode line is electrically connected to the first touch electrode line through the first via, and the second auxiliary electrode line is electrically connected to the second touch electrode line through the first via.

[0038] Optionally, the first touch layer includes the bridging portion, and the second touch layer includes the touch electrode; or, the first touch layer includes the touch electrode, and the second touch layer includes the bridging portion.

[0039] A second aspect of this disclosure provides a display device including a display panel as described in any of the first aspects.

[0040] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0041] The display panel provided in this embodiment includes: a substrate, a light-emitting device layer, an encapsulation layer, a first touch layer, an insulating layer, and a second touch layer. The substrate includes a display area and a non-display area disposed on at least one side of the display area. The light-emitting device layer, the encapsulation layer, and the first touch layer are sequentially stacked on the substrate. The first touch layer includes auxiliary electrode lines located in the non-display area. An insulating layer is disposed on the side of the first touch layer away from the encapsulation layer, and includes a first via located in the non-display area and a second via located in the display area. The second touch layer is disposed on the side of the insulating layer away from the first touch layer, and includes touch electrode lines and a first pad located in the non-display area. One end of the touch electrode line is electrically connected to the first pad. The touch electrode line and the auxiliary electrode line are stacked and electrically connected through the first via. One of the first touch layer and the second touch layer includes a touch electrode, and the other includes a bridging portion. The bridging portion is electrically connected to the touch electrode through the second via. The touch electrode is electrically connected to the other end of the touch electrode line. Therefore, by stacking the touch electrode lines and auxiliary electrode lines and electrically connecting them through a first via, the load (resistance) of the touch electrode lines is reduced, thereby improving the transmission efficiency of touch signals and increasing product yield. Attached Figure Description

[0042] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0043] Figure 1 A schematic diagram of the planar structure of a display panel according to an embodiment of the present disclosure is shown;

[0044] Figure 2 A partial cross-sectional structural schematic diagram of a display panel according to an embodiment of the present disclosure is shown.

[0045] Figure 3 A partial cross-sectional schematic diagram of the display area according to an embodiment of the present disclosure is shown;

[0046] Figure 4 A schematic diagram of the planar structure of the second touch layer according to an embodiment of the present disclosure is shown;

[0047] Figure 5 A schematic diagram of the planar structure of the non-display area according to an embodiment of the present disclosure is shown;

[0048] Figure 6 A schematic diagram of a first partial planar structure of the non-display area according to an embodiment of the present disclosure is shown;

[0049] Figure 7 It shows along Figure 6 A schematic diagram of a partial cross-sectional structure of B-B';

[0050] Figure 8 A schematic diagram of the second partial planar structure of the non-display area according to an embodiment of the present disclosure is shown;

[0051] Figure 9 It shows along Figure 8 A schematic diagram of a partial cross-sectional structure of B-B';

[0052] Figure 10 A schematic diagram of the fourth partial planar structure of the non-display area according to an embodiment of the present disclosure is shown;

[0053] Figure 11 A schematic diagram of the fifth partial planar structure of the non-display area according to an embodiment of the present disclosure is shown;

[0054] Figure 12 A schematic diagram of the sixth partial planar structure of the non-display area according to an embodiment of the present disclosure is shown;

[0055] Figure 13 A schematic diagram of the seventh partial planar structure of the non-display area according to an embodiment of the present disclosure is shown;

[0056] Figure 14 It shows along Figure 13 A schematic diagram of a partial cross-sectional structure of B-B';

[0057] Figure 15 A schematic diagram of the eighth partial planar structure of the non-display area according to an embodiment of the present disclosure is shown;

[0058] Figure 16 It shows along Figure 15 A schematic diagram of a partial cross-sectional structure of B-B';

[0059] Figure 17 A schematic diagram of the ninth partial planar structure of the non-display area according to an embodiment of the present disclosure is shown;

[0060] Figure 18 It shows along Figure 17 A schematic diagram of a partial cross-sectional structure of B-B';

[0061] Figure 19 A schematic diagram of the structure of a display device according to an embodiment of the present disclosure is shown. Detailed Implementation

[0062] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0063] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0064] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0065] It should also be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described.

[0066] As used herein, “about,” “approximately,” “close to,” or “basically” includes the value stated and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0067] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable range of deviation for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0068] The scale of the figures in this disclosure can be used as a reference in actual manufacturing processes, but is not limited thereto. For example, the aspect ratio of the channel, the thickness and spacing of each film layer, and the width and spacing of each signal line can be adjusted according to actual needs. The number of pixels in the display substrate and the number of sub-pixels in each pixel are not limited to the quantities shown in the figures. The figures described in this disclosure are only schematic diagrams of the structure, and one aspect of this disclosure is not limited to the shapes or values ​​shown in the figures.

[0069] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art will understand the specific meaning of these terms in this disclosure based on the specific circumstances.

[0070] In this specification, a transistor is a device that includes at least three terminals: a gate electrode, a drain electrode, and a source electrode. A transistor has a channel region between the drain electrode (drain electrode terminal, drain region, or drain electrode) and the source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to the region through which current primarily flows.

[0071] In this specification, the first electrode can be the drain electrode and the second electrode can be the source electrode, or vice versa. In cases where transistors with opposite polarities are used or the current direction changes during circuit operation, the functions of the "source electrode" and "drain electrode" may sometimes be interchanged. Therefore, in this specification, the "source electrode" and "drain electrode" can be interchanged.

[0072] In this specification, "electrical connection" includes the situation where components are connected together by elements that have a certain electrical function. There are no particular limitations on what constitutes an "electrical function," as long as it allows for the transmission and reception of electrical signals between the connected components. Examples of "electrical functions" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements with various functions.

[0073] In this specification, the terms "film" and "layer" may be interchanged. For example, "conductive layer" may sometimes be replaced with "conductive film." Similarly, "insulating film" may sometimes be replaced with "insulating layer."

[0074] In this specification, triangles, rectangles, trapezoids, pentagons, or hexagons are not strictly defined; they can be approximate triangles, rectangles, trapezoids, pentagons, or hexagons. Small deformations due to tolerances are possible, as are chamfers, curved edges, and other variations.

[0075] In this disclosure, “about” means a value that is not strictly limited and allows for process and measurement errors.

[0076] With the continuous development of display technology, display panels typically incorporate touch functionality. Touch panels can be categorized into resistive and capacitive types. Capacitive touch panels are widely used due to their low cost, ability to achieve true multi-touch, and fast response speed. Currently, touch display technology for Organic Light-Emitting Diode (OLED) display panels has evolved from external touchpads to direct integration onto the display panel, and from mutual capacitance touch technology to self-capacitive touch technology. Mutual capacitance touch panels exhibit a larger RC delay compared to self-capacitive touch panels, and the parasitic capacitance of mutual capacitance touch panels increases exponentially with the size of the touch panel, while the parasitic capacitance of self-capacitive touch panels remains almost constant.

[0077] However, as touch panels become larger, the load on the traces connecting the self-capacitive electrodes increases. In order to improve signal transmission efficiency, it is necessary to reduce the load on the electrode traces through design improvements.

[0078] Figure 1 A schematic diagram of the planar structure of a display panel 10 according to an embodiment of the present disclosure is shown; Figure 2 A partial cross-sectional structural schematic diagram of the display panel 10 according to an embodiment of the present disclosure is shown.

[0079] like Figure 1 and Figure 2As shown, a first aspect of this disclosure provides a display panel 1010, including: a substrate 11, a light-emitting device layer 12, an encapsulation layer 13, a first touch layer 14, an insulating layer 15, and a second touch layer 16. The substrate 11 includes a display area 100 and a non-display area disposed on at least one side of the display area 100; the light-emitting device layer 12 is disposed on one side of the substrate 11; the encapsulation layer 13 is disposed on the side of the light-emitting device layer 12 away from the substrate 11; the first touch layer 14 is disposed on the side of the encapsulation layer 13 away from the light-emitting device layer 12, and includes an auxiliary electrode line 141 located in the non-display area; the insulating layer 15 is disposed on the side of the first touch layer 14 away from the encapsulation layer 13, and includes a first via 151 located in the non-display area and a second via located in the display area; the second touch layer 16 is disposed on... On the side of the insulating layer 15 away from the first touch layer 14, there is a touch electrode line 161 and a first pad 162 located in the non-display area. One end of the touch electrode line 161 is electrically connected to the first pad 162. The touch electrode line 161 is stacked with the auxiliary electrode line 141 and electrically connected through a first via 151. One of the first touch layer 14 and the second touch layer 16 includes a touch electrode 163, and the other includes a bridging portion 142. The bridging portion 142 is electrically connected to the touch electrode 163 through a second via. The touch electrode 163 is electrically connected to the other end of the touch electrode line 161.

[0080] Therefore, by stacking the touch electrode line 161 and the auxiliary electrode line 141 and electrically connecting them through the first via 151, the load (resistance) of the touch electrode line 161 is reduced, thereby improving the transmission efficiency of the touch signal and increasing the product yield.

[0081] Figure 3 A partial cross-sectional structural schematic diagram of the display area 100 according to an embodiment of the present disclosure is shown.

[0082] For example, on a plane perpendicular to the substrate 11, the display area 100 may include a plurality of sub-pixels arranged in an array along the pixel row direction and the pixel column direction. The sub-pixels may include a driving structure layer 17 disposed on the substrate 11, a light-emitting device layer 12 disposed on the side of the driving structure layer 17 away from the substrate 11, and an encapsulation layer 13 disposed on the side of the light-emitting device layer 12 away from the substrate 11.

[0083] In some embodiments, the driving structure layer 17 of each sub-pixel may include a pixel driving circuit composed of multiple transistors and a storage capacitor. The driving structure layer 17 may include: a first insulating layer 15 disposed on a substrate 11; a semiconductor layer disposed on the first insulating layer 15; a second insulating layer 15 covering the semiconductor layer; a first gate metal layer disposed on the second insulating layer 15; a third insulating layer 15 covering the first gate metal layer; a second gate metal layer disposed on the third insulating layer 15; a fourth insulating layer 15 covering the second gate metal layer; a source / drain metal layer 171 disposed on the fourth insulating layer 15; and a planarization layer 172 covering the source / drain metal layer 171. The semiconductor layer may include at least multiple transistors; the first gate metal layer may include at least the gate electrodes of multiple transistors and the first electrode of the storage capacitor; the second gate metal layer may include at least the second electrode of the storage capacitor; and the source / drain metal layer 171 may include at least the first and second electrodes of multiple transistors.

[0084] In some embodiments, the light-emitting device layer 12 may include a light-emitting device composed of multiple film layers. The multiple film layers may include an anode 121, a pixel definition layer 122, an organic light-emitting layer 123, and a cathode 124. The anode 121 is connected to the pixel driving circuit, the organic light-emitting layer 123 is connected to the anode 121, and the cathode 124 is connected to the organic light-emitting layer 123. The organic light-emitting layer 123 emits light of a corresponding color under the driving of the anode 121 and the cathode 124.

[0085] In some embodiments, the encapsulation structure layer may include a first encapsulation layer 131, a second encapsulation layer 132, and a third encapsulation layer 133 stacked together. The first encapsulation layer 131 and the third encapsulation layer 133 may be made of inorganic materials, while the second encapsulation layer 132 may be made of organic materials. The second encapsulation layer 132 is disposed between the first encapsulation layer 131 and the third encapsulation layer 133 to ensure that external moisture cannot enter the light-emitting structure layer.

[0086] In some embodiments, the display area 100 may further include a touch structure layer, which may include a buffer layer disposed on the third encapsulation layer 133, a first touch layer 14 disposed on the buffer layer, an insulating layer 15 covering the first touch layer 14, a second touch layer 16 disposed on the insulating layer 15, and a protective layer covering the second touch layer 16.

[0087] In some embodiments, the first touch layer 14 is disposed on the encapsulation layer 13, for example, on the third encapsulation layer 133, to form a Touch Structure on Thin Film Encapsulation (Touch on TFE) structure, thereby having advantages such as being thin, light and foldable, and meeting the product requirements such as flexible folding and narrow bezels.

[0088] In some embodiments, the first touch layer 14 includes the bridging portion 142, and the second touch layer 16 includes the touch electrode 163; or, the first touch layer 14 includes the touch electrode 163, and the second touch layer 16 includes the bridging portion 142. The specific configuration can be set according to requirements and is not limited here.

[0089] Figure 4 A schematic diagram of the planar structure of the second touch layer 16 according to an embodiment of the present disclosure is shown.

[0090] In some embodiments, the touch electrode 163 includes a plurality of first touch electrodes 163A along a first direction and a second touch electrode 163B along a second direction, the first direction intersecting the second direction, and adjacent first touch electrodes 163A are electrically connected through the bridging portion 142, or adjacent second touch electrodes 163B are electrically connected through the bridging portion 142.

[0091] It is understandable that when adjacent first touch electrodes 163A are electrically connected through bridging portion 142, adjacent second touch electrodes 163B can be directly electrically connected; when adjacent second touch electrodes 163B are electrically connected through bridging portion 142, adjacent second touch electrodes 163B can be directly electrically connected.

[0092] For example, the first touch electrode 163A and the second touch electrode 163B can be constructed using a metal mesh structure and can be formed through the same patterning process. The first touch electrode 163A and the second touch electrode 163B can be disposed in the same layer and made of the same material, and the metal mesh patterns of the first touch electrode 163A and the second touch electrode 163B are identical. Identical metal mesh patterns mean that the metal traces of the metal mesh have the same direction and line width. Since metal materials have better ductility and are less prone to breakage, the bending performance of the display panel 10 can be improved, making the display panel 10 more suitable for implementing flexible touch functions and reducing costs. Furthermore, the fact that the first touch electrode 163A and the second touch electrode 163B are disposed in the same layer and made of the same material, and have the same pattern, allows for the deployment of identical metal mesh patterns on the substrate 11. This improves the problem of poor anti-aliasing and optical moiré patterns caused by interference between different layers of metal mesh due to differences in line width, resulting in a better anti-aliasing effect.

[0093] In some embodiments, the first touch electrode 163A may be a driving electrode (Tx) and the second touch electrode 163B may be a sensing electrode (Rx), or the first touch electrode 163A may be a sensing electrode (Rx) and the second touch electrode 163B may be a driving electrode (Tx). This disclosure does not limit the specific embodiments.

[0094] In some embodiments, the first touch electrode 163A and the second touch electrode 163B may have a rhombus shape, such as a regular rhombus, a horizontally elongated rhombus, or a vertically elongated rhombus. Exemplarily, the first touch electrode 163A and the second touch electrode 163B may have any one or more of the following shapes: triangle, square, trapezoid, parallelogram, pentagon, hexagon, and other polygons, which are not limited herein. Figure 4 The following explanation uses the first touch electrode 163A and the second touch electrode 163B as examples of being rhomboid in shape.

[0095] In some embodiments, the number of the first touch electrode 163A and the second touch electrode 163B can be set according to the touch accuracy, and is not limited here.

[0096] For example, the materials used to fabricate the touch electrode 163 and the bridging portion 142 can be metals, such as any one or more of silver (Ag), copper (Cμ), aluminum (Al), titanium (Ti) and molybdenum (Mo), or alloys of the above metals, such as aluminum-neodymium alloy (AINd) or molybdenum-niobium alloy (MoNb). They can be single-layer structures or multi-layer composite structures, such as Mo / Cμ / Mo.

[0097] Optionally, the buffer layer and insulating layer 15 can be any one or more of silicon oxide (SiOx), silicon nitride (SiNx) and silicon oxynitride (SiON), and can be a single layer, multilayer or composite layer; the protective layer can be a glass cover.

[0098] In some embodiments, the non-display area may include a bonding area 200 located on one side of the display area 100 and a border area 300 located on the other side of the display area 100. The bonding area 200 may include at least an isolation dam and bonding circuitry that connects signal lines of multiple sub-pixels to an external driving device. The border area 300 may include at least an isolation dam, a gate driver array (GOA), and power lines that transmit voltage signals to the multiple sub-pixels. The bonding area 200 and the isolation dam of the border area 300 may form a ring structure surrounding the display area 100.

[0099] Figure 5 A schematic diagram of the planar structure of the non-display area according to an embodiment of the present disclosure is shown.

[0100] like Figure 5As shown, exemplarily, in a plane parallel to the substrate 11, the bonding area 200 can be located on one side of the display area 100. The bonding area 200 may include a first fan-out area 211, a bending area 212, a second fan-out area 213, an anti-static area 214, a driver chip area 215, and a bonding pin area 216 arranged sequentially along a direction away from the display area 100. The first fan-out area 211 may include at least multiple data connection lines, multiple touch leads, and power lines. The multiple data connection lines are configured to connect to the data lines of the display area 100 in a fan-out routing manner. The multiple touch leads are configured to connect to the touch electrodes 163 of the display area 100. The power lines include a first power line (VSS) and a second power line (VDD). The first power line is configured to connect to the low-voltage power line of the bezel area 300, and the second power line is configured to connect to the high-voltage power line of the display area 100. The bending area 212 may include a composite insulating layer 15 with grooves, configured to bend the bonding area 200 to the back of the display area 100. The second fan-out area 213 may include multiple data connection lines led out in a fan-out routing manner. The anti-static area 214 may include anti-static circuitry, configured to prevent electrostatic damage to the display panel 10 by eliminating static electricity. The driver chip area 215 includes an integrated circuit (IC) configured to connect to multiple data lines. The bonding pin area 216 may include multiple bonding pads configured to be electrically connected to touch leads and bonded to an external flexible printed circuit board (FPC), for example along... Figure 5 Cutting along A-A' yields a corresponding partial cross-sectional structure diagram (not shown). This partial cross-sectional diagram shows the film layer stacking structure at the bonding pad location in a direction perpendicular to the display panel 10.

[0101] For example, a first isolation dam 410 and a second isolation dam 420 may be provided in the first fan-out area 211. The first isolation dam 410 and the second isolation dam 420 may extend in a direction parallel to the edge of the display area 100. The distance between the first isolation dam 410 and the edge of the display area 100 is less than the distance between the second isolation dam 420 and the edge of the display area 100. This configuration is intended to block the organic layer of the encapsulation layer 13 to prevent the organic layer from flowing to the bending area 212.

[0102] See also Figure 4In some embodiments, the second touch layer 16 includes a plurality of touch electrode lines 161, the touch electrode lines 161 including a first touch electrode line 161A and a second touch electrode line 161B, the first pad 162 including a first sub-pad and a second sub-pad, the first via 151 being multiple, one end of the first touch electrode line 161A being electrically connected to the first touch electrode 163A, the other end of the first touch electrode line 161A being electrically connected to the first sub-pad, one end of the second touch electrode line 161B being electrically connected to the second touch electrode line 161B, and the other end of the second touch electrode line 161B being electrically connected to the second sub-pad; the auxiliary electrode line 141 includes a first auxiliary electrode line 141 and a second auxiliary electrode line 141, the first auxiliary electrode line 141 being electrically connected to the first touch electrode line 161A through a first via 151, and the second auxiliary electrode line 141 being electrically connected to the second touch electrode line 161B through a first via 151.

[0103] In some embodiments, when the second touch layer 16 includes a touch electrode 163 and the first touch layer 14 includes a bridging portion 142, the touch electrode line 161 can be integrally formed with the touch electrode 163; when the first touch layer 14 includes a touch electrode 163 and the second touch layer 16 includes a bridging portion 142, the touch electrode line 161 can be connected to the touch electrode 163 through a second via, wherein there can be multiple second vias.

[0104] Taking the first touch electrode 163A as the driving electrode and the second touch electrode 163B as the sensing electrode as an example, the working principle of the touch electrode 163 is explained as follows: When the display panel 10 is working, a driving signal is input to the first first touch electrode 163A through the first pad 162. Each second touch electrode 163B receives the signal in sequence and inputs a driving signal to the second first touch electrode 163A. This process continues until a driving signal is input to the last first touch electrode 163A. Since the user's finger touch causes a change in the mutual capacitance between the first touch electrode 163A and the second touch electrode 163B, the touch position of the user's finger can be determined based on the change in the mutual capacitance between the first touch electrode 163A and the second touch electrode 163B.

[0105] Figure 6 A schematic diagram of a first partial planar structure of the non-display area according to an embodiment of the present disclosure is shown; Figure 7 It shows along Figure 6 A schematic diagram of a partial cross-sectional structure of B-B'.

[0106] It should be noted that, for ease of explanation, in this embodiment, the touch electrode line 161 and the first pad 162 are integrally formed and disposed. Figure 7 In the diagram, the touch electrode line 161 and the first pad 162 are separated by dashed lines. The location of the dashed line indicates the connection point between the touch electrode line 161 and the first pad 162. The left side of the dashed line represents the touch electrode line 161, and the right side represents the first pad 162. In the subsequent partial cross-sectional structural diagrams including the touch electrode line 161 and the first pad 162, unless otherwise specified, the touch electrode line 161 and the first pad 162 will be divided by the dashed lines shown in the diagram, which will not be repeated below.

[0107] In addition, it should be noted that, for ease of understanding, in Figure 6 In the accompanying figures, the extension direction of the touch electrode line 161 is defined as the X direction, the target direction that is parallel to the plane of the substrate 11 and perpendicular to the extension direction of the touch electrode line 161 is defined as the Y direction, and the direction that is perpendicular to both the X and Y directions is defined as the Z direction.

[0108] In some examples, there can be multiple first vias 151. During fabrication, the touch electrode line 161 is deposited at the locations of multiple first vias 151 and connected to the auxiliary electrode line 141 to form a parallel electrical connection structure. As a result, the auxiliary electrode line 141 can reduce the load (resistance) of the touch electrode line 161 and improve signal transmission efficiency.

[0109] For example, the display panel 10 may also include other film layers, such as other film layers that may be disposed between the first touch layer 14 and the encapsulation layer 13, which is not limited here.

[0110] In some embodiments, the display panel 10 may further include a touch driver chip located in a non-display area, wherein the touch driver chip may be located on the side of the pad area close to the display area 100, thereby the touch electrode 163 can be connected to the touch driver chip through the touch electrode line 161 and the first pad 162 to obtain the drive signal of the driver chip.

[0111] However, the inventor of the utility model further discovered that, such as Figure 6 and Figure 7 As shown, the first touch layer 14 includes an auxiliary electrode line 141, which is stacked with the touch electrode line 161 and electrically connected through a first via 151. However, the end of the auxiliary electrode line 141 near the first pad 162 is suspended. Therefore, a step (hereinafter referred to as side step 141C) is formed on the plane (parallel to the substrate 11) where the end of the auxiliary electrode line 141 near the first pad 162 and the previous film layer (such as the buffer layer mentioned above) are located. That is, there is a large step difference between the end of the auxiliary electrode line 141 near the first pad 162 and the buffer layer.

[0112] In the fabrication process, in the direction perpendicular to the substrate 11, the insulating layer 15 slopes up at the position corresponding to the side step 141C, so that a corresponding step is also formed on the insulating layer 15 at the position corresponding to the side step 141C. Then, when fabricating the touch electrode line 161, the touch electrode line 161 also slopes up at the position corresponding to the side step 141C. Due to the numerous wirings in the border area 300 and the bonding area 200, the width of the touch electrode line 161 is usually set to be relatively narrow. Furthermore, since the orthographic projection of the auxiliary electrode line 141 on the substrate 11 does not overlap or is basically non-overlapping with the orthographic projection of the first pad 162 on the substrate 11, for example, the orthographic projection of the end of the auxiliary electrode line 141 near the first pad 162 on the substrate 11 is basically flush with the edge of the orthographic projection of the first pad 162 on the substrate 11, when the touch electrode line 161 climbs up the slope at the position corresponding to the side step 141C, the presence of the side step 141C causes the touch electrode line 161 to be prone to breakage during the climb, thereby disconnecting the electrical connection with the first pad 162. As a result, external touch signals (such as touch signals from the driver chip) cannot be transmitted from the first pad 162 to the touch electrode line 161, and thus cannot be transmitted to the touch electrode 163, causing the touch electrode 163 to malfunction or even fail.

[0113] In view of this, in order to reduce the risk of breakage of the touch electrode line 161 at the location of the side step 141C, this disclosure provides the following embodiments to solve the above problems, which will be described in detail below with reference to the specific drawings.

[0114] Figure 8 A schematic diagram of the second partial planar structure of the non-display area according to an embodiment of the present disclosure is shown; Figure 9 It shows along Figure 8 A schematic diagram of a partial cross-sectional structure of B-B'.

[0115] In some embodiments, in the target direction, the width of the touch electrode line 161 is smaller than the width of the first pad 162, and the target direction is parallel to the substrate 11 and perpendicular to the extension direction of the touch electrode line 161; the orthographic projection of the side step 141C of the auxiliary electrode line 141 near the end of the first pad 162 on the substrate 11 is located within the orthographic projection of the first pad 162 on the substrate 11; the auxiliary electrode line 141 includes a main body portion 141A and an extension portion 141B (e.g., ...) that are electrically connected to each other. Figure 9As shown within the rectangular dashed box, the extension 141B is closer to the first pad 162 than the main body 141A. The extension 141B includes the side step 141C. The main body 141A is stacked with the touch electrode line 161 and electrically connected through the first via. The orthographic projection of the extension 141B on the substrate 11 is located within the orthographic projection of the first pad 162 on the substrate 11. In the extension direction of the touch electrode line 161, the width of the extension 141B is greater than or equal to 2μm, for example, 2μm, 2.5μm, 3μm, 3.5μm, 4μm, 4.5μm, 5μm, 5.5μm, 6μm, 6.5μm, 7μm, etc.

[0116] It is understandable that, such as Figure 4 As shown, the touch electrode line 161 extends from the touch electrode 163, passes through the frame area 300, and extends to the bonding area 200, where it is electrically connected to the first pad 162. The touch electrode line 161 can undergo multiple bends within the frame area 300 and the bonding area 200. However, the overall extension direction of the touch electrode line 161 remains from the touch electrode 163 to the bonding area 200 where it connects to the first pad 162. Therefore, the extension direction of the touch electrode line 161 can be towards the first pad 162, as shown below. Figure 9 The X direction is shown. Furthermore, for ease of understanding, this embodiment of the disclosure also defines the target direction as the Y direction and the direction perpendicular to the substrate 11 as the Z direction.

[0117] It should be noted that the target direction is parallel to the substrate 11 and perpendicular to the extension direction of the touch electrode line 161, thereby clearly defining the width direction of the touch electrode line 161 and the width direction of the first pad 162, such as... Figure 8 As shown, the width of the touch electrode line 161 is smaller than the width of the first pad 162. This is consistent with the description that the width of the touch electrode line 161 is usually set to be narrow due to the numerous wirings in the border area 300 and the bonding area 200. However, because the width of the touch electrode line 161 is smaller than the width of the first pad 162, the touch electrode line 161 is prone to breakage when climbing up the slope at the side step 141C of the auxiliary electrode line 141, thereby breaking the electrical connection with the first pad 162. As a result, the external touch signal cannot be transmitted from the first pad 162 to the touch electrode line 161, and thus cannot be transmitted to the touch electrode 163, causing the touch electrode 163 to malfunction or even fail.

[0118] In this embodiment of the present disclosure, in a direction perpendicular to the substrate 11, the end of the auxiliary electrode line 141 near the first pad 162 extends below the first pad 162; or, in the extension direction of the touch electrode line 161, the distance between the end of the auxiliary electrode line 141 near the first pad 162 and the first pad 162 is less than the distance between the end of the touch electrode line 161 near the first pad 162 and the first pad 162.

[0119] It is understandable that, in order to make the orthographic projection of the side step 141C on the substrate 11 lie within the orthographic projection of the first pad 162 on the substrate 11, in the fabrication process, the length of the touch electrode line 161 can be reduced and the length of the auxiliary electrode line 141 can be increased in the extension direction of the touch electrode line 161. Thus, in the direction perpendicular to the substrate 11, the end of the auxiliary electrode line 141 near the first pad 162 extends to the bottom of the first pad 162.

[0120] It is understandable that, since the orthogonal projection of the side step 141C onto the substrate 11 lies within the orthogonal projection of the first pad 162 onto the substrate 11, the first pad 162 will slope up at the position corresponding to the side step 141C, thereby forming the first slope portion 162A. For example... Figure 9 As shown within the circular dashed box, the first ramp portion 162A covers the side step 141C. It is understood that the description of the first ramp portion 162A here illustrates the positional relationship between the auxiliary electrode line 141 and the first pad 162 from different angles.

[0121] In other words, compared to related technologies where the touch electrode line 161 climbs the slope at the position corresponding to the side step 141C, this embodiment uses the first pad 162 to climb the slope at the position corresponding to the side step 141C. It is understood that, compared to the relatively flat structure of the first pad 162 in related technologies, the first pad 162 in this embodiment can be partially convex, i.e., the position corresponding to the side step 141C is convex, while the other parts are flat.

[0122] It is understandable that, in the extension direction of the touch electrode line 161, the width of the extension 141B can be less than the width of the first pad 162, that is, the extension 141B does not exceed the edge of the first pad 162.

[0123] Based on the above disclosure, since the side step 141C of the auxiliary electrode line 141 extends below the first pad 162 in the extension direction of the touch electrode line 161, and the orthographic projection of the side step 141C on the substrate 11 is within the orthographic projection of the first pad 162 on the substrate 11, in the fabrication process of the touch electrode line 161 and the first pad 162, the touch electrode line 161 does not need to climb at the position corresponding to the side step 141C of the auxiliary electrode line 141. Instead, the first pad 162 climbs at the position corresponding to the side step 141C of the auxiliary electrode line 141. In other words, the climbing position of the second touch layer 16 is transferred from the original narrower touch electrode line 161 to the wider first pad 162, reducing the risk of breakage when the first pad 162 climbs at the position corresponding to the side step 141C. Furthermore, due to the large width of the first pad 162, even if part or all of the first ramp portion 162A breaks, such as Figure 8 As shown in the diagram, at the position corresponding to the auxiliary electrode line 141 located below the first pad 162, the first ramp portion 162A breaks at the position indicated by the dashed box. The broken area is very small for the first pad 162 as a whole, and does not affect the electrical connection between the first pad 162 and the touch electrode line 161, thus not affecting the signal transmission between the first pad 162 and the touch electrode line 161, thereby ensuring the effectiveness of the signal transmission.

[0124] It should be noted that, due to the numerous wirings in the border area 300 and the bonding area 200, the width of the touch electrode line 161 and the auxiliary electrode line 141 are usually set to be relatively narrow. In order to improve process efficiency and reduce process complexity, the touch electrode line 161 and the auxiliary electrode line 141 are usually patterned with the same pattern, and their widths are basically the same. This can cause the touch electrode line 161 to break when climbing up the side step 141C of the auxiliary electrode line 141, thereby breaking the electrical connection with the first pad 162. As a result, the external touch signal cannot be transmitted from the first pad 162 to the touch electrode line 161, and thus cannot be transmitted to the touch electrode 163, causing the touch electrode 163 to malfunction or even fail.

[0125] Figure 10 A schematic diagram of the fourth partial planar structure of the non-display area according to an embodiment of the present disclosure is shown; Figure 11 A schematic diagram of the fifth partial planar structure of the non-display area according to an embodiment of the present disclosure is shown; Figure 12 A schematic diagram of the sixth partial planar structure of the non-display area according to an embodiment of the present disclosure is shown.

[0126] In some embodiments, the touch electrode line 161 includes a second ramp portion 161C, which covers the side step 141C of the auxiliary electrode line 141 near the end of the first pad 162; the orthographic projection of the auxiliary electrode line 141 on the substrate 11 is located within the orthographic projection of the touch electrode line 161 on the substrate 11.

[0127] In some embodiments, in the target direction, the width of the auxiliary electrode line 141 is smaller than the width of the touch electrode line 161, and the target direction is parallel to the substrate 11 and perpendicular to the extension direction of the touch electrode line 161.

[0128] It is understood that, since the orthogonal projection of the auxiliary electrode line 141 on the substrate 11 is within the orthogonal projection of the touch electrode line 161 on the substrate 11, that is, the area of ​​the auxiliary electrode line 141 is generally smaller than the area of ​​the touch electrode line 161, and the location that causes the second climbing portion 161C to break is mainly in the target direction, the width of the auxiliary electrode line 141 in this embodiment is set to be smaller than the width of the touch electrode line 161.

[0129] In some embodiments, the orthographic projection of the auxiliary electrode line 141 on the substrate 11 is a first projection area 141D, the first projection area 141D including a first edge 141E and a second edge 141F opposite each other, and the orthographic projection of the touch electrode line 161 on the substrate 11 is a second projection area 161D, the second projection area 161D including a third edge 161E and a fourth edge 161F opposite each other, the first edge 141E, the second edge 141F, the third edge 161E and the fourth edge 161F extending along the extension direction of the touch electrode line 161; the distance between the first edge 141E and the third edge 161E is greater than or equal to 2 μm, and / or the distance between the second edge 141F and the fourth edge 161F is greater than or equal to 2 μm.

[0130] For example, such as Figure 10 As shown, the distance between the first edge 141E and the third edge 161E is greater than or equal to 2 μm, and the distance between the second edge 141F and the fourth edge 161F is greater than or equal to 2 μm. For example: Figure 11 As shown, the distance between the first edge 141E and the third edge 161E is greater than or equal to 2 μm. For example: Figure 12 As shown, the distance between the second edge 141F and the fourth edge 161F is greater than or equal to 2μm.

[0131] In some embodiments, the width of a portion of the auxiliary electrode line 141 near the first pad 162 may be set narrower. This portion includes a side step 141C, and in the target direction, the width of the portion is less than the width of the touch electrode line 161.

[0132] It is understood that the spacing between the first edge 141E and the third edge 161E, or the spacing between the second edge 141F and the fourth edge 161F, can be 2μm, 3μm, 4μm, 5μm, etc., and can be adaptively set according to the width of the touch electrode line 161 and the auxiliary electrode line 141. During the manufacturing process, factors such as the load reduction capability of the auxiliary electrode line 141 on the touch electrode line 161, the reliability of the auxiliary electrode line 141 itself, and the fact that the touch electrode line 161 is not prone to breakage at the position corresponding to the side step 141C can be taken into consideration in order to improve the product yield.

[0133] Based on the above disclosure, by setting the width of the auxiliary electrode line 141 to be smaller than the width of the touch electrode line 161 in the extension direction of the touch electrode line 161, that is, the orthogonal projection of the auxiliary electrode line 141 on the substrate 11 is located within the orthogonal projection of the touch electrode line 161 on the substrate 11. Therefore, during the fabrication of the touch electrode line 161, since the width of the touch electrode line 161 is greater than that of the auxiliary electrode line 141, when the touch electrode line 161 climbs at the position corresponding to the side step 141C of the auxiliary electrode line 141, the width of the climbing portion will also be greater than that of the side step 141C. Thus, even if some parts of the climbing portion break, some parts will not break. In other words, at least some areas of the touch electrode line 161 can still be electrically connected to the first pad 162, which does not affect the signal transmission between the first pad 162 and the touch electrode line 161, thereby ensuring the effectiveness of signal transmission.

[0134] Figure 13 A schematic diagram of the seventh partial planar structure of the non-display area according to an embodiment of the present disclosure is shown; Figure 14 It shows along Figure 13 A schematic diagram of a partial cross-sectional structure of B-B'.

[0135] In some embodiments, the first touch layer 14 further includes: a second pad 164 located in the non-display area, the second pad 164 being electrically connected to the auxiliary electrode line 141; the insulating layer 15 further includes a third via 152, the second pad 164 being stacked with the first pad 162 and electrically connected through the first via 151.

[0136] It is understood that the second pad 164 in this embodiment can be a dummy pad. On the one hand, it can work with the auxiliary electrode line 141 to reduce the load on the auxiliary electrode line 141. On the other hand, after being electrically connected to the auxiliary electrode line 141, the end of the auxiliary electrode line 141 near the first pad 162 is no longer suspended, and the end of the auxiliary electrode line 141 no longer has the side step 141C. Therefore, when fabricating the touch electrode line 161, the touch electrode line 161 does not need to climb at the original side step 141C position of the auxiliary electrode line 141, eliminating the step difference of the touch electrode line 161 at the original climbing position, thereby reducing the risk of the auxiliary electrode line 141 breaking.

[0137] It is understood that in the manufacturing process, a third via 152 is etched into the insulating layer 15 between the second pad 164 and the first insulating layer 162. There may be multiple third vias 152, so that the second pad 164 and the first pad 162 are stacked and electrically connected through the third via 152.

[0138] It should be noted that when the first touch layer 14 is provided with an auxiliary electrode line 141, the auxiliary electrode line 141 is stacked with the touch electrode line 161 and electrically connected through the first via 151. However, the end of the auxiliary electrode line 141 near the first pad 162 is suspended. Therefore, a step (hereinafter referred to as side step 141C) is formed at the end of the auxiliary electrode line 141 on the plane (parallel to the substrate 11) where the previous film layer (e.g., the buffer layer mentioned above) is located. During the fabrication of the insulating layer 15, the insulating layer 15 will be sloped at the position of the side step 141C, thus forming a step that is stacked with the side step 141C. Consequently, during the fabrication of the touch electrode line 161, the touch electrode line 161 also needs to be sloped at the position of the side step 141C. Because the border area 300 and the bonding area 200 have numerous wirings, the width of the touch electrode line 161 and the auxiliary electrode line 141 are usually set to be relatively narrow. This causes the touch electrode line 161 to easily break when climbing up the side step 141C of the auxiliary electrode line 141. The main reason for the breakage is that the presence of the side step 141C causes a step difference in the touch electrode line 161 at the position corresponding to the side step 141C. Therefore, in order to reduce the step difference of the touch electrode line 161 at the position corresponding to the side step 141C, this disclosure proposes the following embodiments to solve the above problems, which will be described below in conjunction with specific drawings.

[0139] like Figure 7As shown, the orthographic projection of the support layer 18 on the substrate 11 does not overlap with the orthographic projection of the first pad 162 on the substrate 11, or they partially overlap, or the orthographic projection of the first pad 162 on the substrate 11 is within the orthographic projection of the support layer 18 on the substrate 11. However, the orthographic projection of the support layer 18 on the substrate 11 does not overlap with the orthographic projection of the auxiliary electrode line 141 on the substrate 11, and the orthographic projection of the support layer 18 on the substrate 11 does not overlap with the orthographic projection of the touch electrode line 161 on the substrate 11. The resulting problem is that the step difference of the side step 141C is large, making the touch electrode line 161 prone to breakage when climbing uphill at the position corresponding to the side step 141C.

[0140] It is understandable that, such as Figure 7 As shown, a planarization layer 172 is typically disposed between the auxiliary electrode lines 141 and the support layer 18. The planarization layer 172 extends from the extension direction of the touch electrode lines 161. A portion of the structure of the planarization layer 172 is located below the auxiliary electrode lines 141, and another portion is stacked on the support layer 18 to provide edge wrapping and planarization for the support layer 18. For example, the thickness of the support layer 18 is small in the direction perpendicular to the substrate 11. Therefore, although the planarization layer 172 has a slope at the position where it overlaps with the support layer 18, the slope of the slope is small, and the difference in step difference between the various positions of the planarization layer 172 and the substrate 11 is also small.

[0141] Figure 15 A schematic diagram of the eighth partial planar structure of the non-display area according to an embodiment of the present disclosure is shown; Figure 16 It shows along Figure 15 A schematic diagram of a partial cross-sectional structure of B-B'.

[0142] In some embodiments, the system further includes: a support layer 18 disposed on the side of the first touch layer 14 away from the insulating layer 15 and located in the non-display area; the insulating layer includes a fourth via 153; the support layer 18 is electrically connected to the first pad 18 through the fourth via; the orthographic projection of the support layer 18 on the substrate 11 at least partially overlaps with the orthographic projection of the first pad 162 on the substrate 11; and the orthographic projection of the support layer 18 on the substrate 11 at least partially overlaps with the orthographic projection of the auxiliary electrode line 141 on the substrate 11.

[0143] In some embodiments, the first pad 162 includes a first ramp portion 162A, which covers the side step 141C of the auxiliary electrode line 161 near the end of the first pad 162, and the orthographic projection of the first ramp portion 162A on the substrate 11 is located within the orthographic projection of the support layer 18 on the substrate 11.

[0144] Understandably, when the first ramp portion 162A covers the side step 141C, the ramp position of the first touch layer 14 is shifted from the original auxiliary electrode line 141 to the first pad 162. Since the width of the first pad 162 is relatively large, the risk of breakage of the first pad 162 can be reduced to a certain extent. Based on this, this embodiment extends the support layer 18 below the auxiliary electrode line 141, thereby making the slope angle of the side step 141C of the auxiliary electrode line 141 gentler. This allows the first pad 162 to smoothly transition when ramping at the position corresponding to the side step 141C, reducing the risk of breakage of the first pad 162.

[0145] In some embodiments, the touch electrode line 161 includes a second ramp portion 161C, which covers the side step 141C of the auxiliary electrode line 141 near the end of the first pad 162, and the orthographic projection of the second ramp portion 161C on the substrate 11 is located within the orthographic projection of the support layer 18 on the substrate 11.

[0146] It is understandable that when the second ramp portion 161C covers the side step 141C, the ramp position of the first touch layer 14 is still on the touch electrode line 161, and the risk of breakage of the second ramp portion 161C is relatively high. Based on this, the embodiment of this disclosure extends the support layer 18 to below the auxiliary electrode line 141, thereby making the slope angle of the side step 141C of the auxiliary electrode line 141 gentler. This allows the touch electrode line 161 to smoothly transition when ramping at the position corresponding to the side step 141C, reducing the risk of breakage of the touch electrode line 161.

[0147] In some embodiments, the orthographic projection of the side step 141C on the substrate 11 lies within the orthographic projection of the support layer 18 on the substrate 11.

[0148] It is understood that when the orthographic projection of the side step 141C on the substrate 11 is within the orthographic projection of the support layer 18 on the substrate 11, the first ramp portion 162A and the second ramp portion 161C are also within the orthographic projection of the support layer 18 on the substrate 11. Here, the relationship between the first ramp portion 162A or the second ramp portion 161C and the support layer 18 is described from different angles.

[0149] In some embodiments, the orthographic projection edge of the side step 141C on the substrate 11 overlaps with the orthographic projection edge of the support layer 18 on the substrate 11.

[0150] It is understood that when the orthographic projection edge of the side step 141C on the substrate 11 overlaps with the orthographic projection edge of the support layer 18 on the substrate 11, the first ramp portion 162A and the second ramp portion 161C also overlap with the orthographic projection edge of the support layer 18 on the substrate 11 within their orthographic projections on the substrate 11. This describes the relationship between the first ramp portion 162A or the second ramp portion 161C and the support layer 18 from different angles. That is, in the routing direction of the touch electrode line 161, the support layer 18 extends at least to a position flush with the edge of the side step 141C, thereby reducing the slope of the side step 141C and providing support for the auxiliary electrode line 141 or the first pad 162.

[0151] Therefore, in this embodiment, the support layer 18 extends toward the auxiliary electrode line 141 in the extension direction of the touch electrode line 161, such that the orthographic projection of the support layer 18 on the substrate 11 at least partially overlaps with the auxiliary electrode line 141 on the substrate 11. That is, in the direction perpendicular to the substrate 11, the support layer 18 extends below the auxiliary electrode line 141, thereby enabling the planarization layer 172 to slope the support layer 18 below the first touch layer 14. This raises the auxiliary electrode line 141 on the planarization layer 172 at the slope position, making the slope angle of the side step 141C of the auxiliary electrode line 141 gentler. This allows the touch electrode line 161 to transition smoothly when sloping at the position corresponding to the side step 141C, reducing the risk of breakage of the touch electrode line 161.

[0152] In some embodiments, the support layer 18 may be made of a metal material. For example, the display panel 10 further includes a source / drain metal layer 171, which is disposed on the side of the first touch layer 14 away from the insulating layer 15 and located in the display area 100. The source / drain metal layer 171 is disposed in the same layer as the support layer 18.

[0153] It should be noted that, as Figure 7 As shown, after the first touch layer 14 and the second touch layer 16 are fabricated, an OC (organic capping layer 19) is usually formed on the second touch layer 16 to protect it. In related technologies, when the second touch layer 16 is fabricated, it extends from the display area 100 to the frame area 300. In the direction perpendicular to the substrate 11, the orthogonal projection of the organic capping layer 19 on the substrate 11 does not overlap with the second ramp portion 161C of the touch electrode line 161. One reason why the second ramp portion 161C breaks at the side step 141C is that during the development process of the organic capping layer 19, the second ramp portion 161C is easily corroded by the developer of the organic capping layer 19, leading to the breakage of the second ramp portion 161C.

[0154] Figure 17 A schematic diagram of the ninth partial planar structure of the non-display area according to an embodiment of the present disclosure is shown; Figure 18 It shows along Figure 17 A schematic diagram of a partial cross-sectional structure of B-B'.

[0155] In some embodiments, it also includes:

[0156] A cover layer 19 is disposed on the side of the second touch layer 16 away from the insulating layer 15;

[0157] The touch electrode line 161 includes a second ramp portion 161C, which covers the side step 141C. The orthographic projection of the second ramp portion 161C on the substrate 11 is located within the orthographic projection of the cover layer 19 on the substrate 11, and / or, the orthographic projection of the side step 141C on the substrate 11 is located within the orthographic projection of the cover layer 19 on the substrate 11.

[0158] It is understood that, in the direction perpendicular to the substrate 11, the positions of the second ramp portion 161C and the side step 141C are usually corresponding. Therefore, when the orthographic projection of the side step 141C on the substrate 11 is within the orthographic projection of the cover layer 19 on the substrate 11, the orthographic projection of the second ramp portion 161C on the substrate 11 is also within the orthographic projection of the cover layer 19 on the substrate 11. The above description is only from different angles of the positional relationship between the cover layer 19 and the second ramp portion 161C.

[0159] Therefore, in the present embodiment, when preparing the cover layer 19, the cover layer 19 is extended above the second ramp portion 161C in the extension direction of the touch electrode line 161 to cover the second ramp portion 161C. Then, during the development process of the cover layer 19, the second ramp portion 161C is covered by the cover layer 19 and will not be corroded by the developer of the organic cover layer 19, thereby reducing the risk of breakage of the second ramp portion 161C.

[0160] Figure 19 A schematic diagram of the structure of the display device 20 according to an embodiment of the present disclosure is shown.

[0161] In another aspect, this disclosure provides a display device 20, including any of the display panels 10 described in the first aspect.

[0162] The display device 20 can be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0163] It should be noted that the above embodiments are illustrative of the present invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0164] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A display panel, characterized in that, include: A substrate, comprising a display area and a non-display area disposed on at least one side of the display area; A light-emitting device layer is disposed on one side of the substrate. An encapsulation layer is disposed on the side of the light-emitting device layer away from the substrate. A first touch layer is disposed on the side of the encapsulation layer away from the light-emitting device layer, and includes auxiliary electrode lines located in the non-display area; An insulating layer is disposed on the side of the first touch layer away from the encapsulation layer, the insulating layer including a first via located in the non-display area and a second via located in the display area; The second touch layer is disposed on the side of the insulating layer away from the first touch layer, and includes a touch electrode line and a first pad located in the non-display area. One end of the touch electrode line is electrically connected to the first pad. The touch electrode line and the auxiliary electrode line are stacked and electrically connected through the first via. The first touch layer and the second touch layer each include a touch electrode and a bridging portion. The bridging portion is electrically connected to the touch electrode through a second via, and the touch electrode is electrically connected to the other end of the touch electrode line.

2. The display panel according to claim 1, characterized in that, In the target direction, the width of the touch electrode line is smaller than the width of the first pad, and the target direction is parallel to the substrate and perpendicular to the extension direction of the touch electrode line; The orthographic projection of the side step of the auxiliary electrode line near the first pad on the substrate is located within the orthographic projection of the first pad on the substrate. The auxiliary electrode line includes a main body and an extension that are electrically connected to each other. The extension is closer to the first pad than the main body, and the extension includes the side step. The main body and the touch electrode line are stacked and electrically connected through the first via, and the orthographic projection of the extension on the substrate is located within the orthographic projection of the first pad on the substrate. In the extending direction of the touch electrode line, the width of the extension is greater than or equal to 2 μm.

3. The display panel according to claim 1, characterized in that, The touch electrode line includes a second ramp portion that covers the side step of the auxiliary electrode line near the first pad. The orthogonal projection of the auxiliary electrode line on the substrate lies within the orthogonal projection of the touch electrode line on the substrate.

4. The display panel according to claim 1, characterized in that, In the target direction, the width of the auxiliary electrode line is smaller than the width of the touch electrode line, and the target direction is parallel to the substrate and perpendicular to the extension direction of the touch electrode line.

5. The display panel according to claim 3, characterized in that, The orthographic projection of the auxiliary electrode line on the substrate is a first projection area, which includes a first edge and a second edge. The orthographic projection of the touch electrode line on the substrate is a second projection area, which includes a third edge and a fourth edge. The first edge, the second edge, the third edge, and the fourth edge extend along the extension direction of the touch electrode line. The distance between the first edge and the third edge is greater than or equal to 2 μm, and / or the distance between the second edge and the fourth edge is greater than or equal to 2 μm.

6. The display panel according to claim 1, characterized in that, The first touch layer further includes: a second pad located in the non-display area, the second pad being electrically connected to the auxiliary electrode line; The insulating layer further includes a third via, wherein the second pad is stacked on top of the first pad and electrically connected through the third via.

7. The display panel according to any one of claims 1-6, characterized in that, Also includes: A support layer is disposed on the side of the first touch layer away from the insulating layer and located in the non-display area. The orthographic projection of the support layer on the substrate at least partially overlaps with the orthographic projection of the first pad on the substrate, and the orthographic projection of the support layer on the substrate at least partially overlaps with the orthographic projection of the auxiliary electrode line on the substrate.

8. The display panel according to claim 7, characterized in that, The first pad includes a first ramp portion that covers a side step of the auxiliary electrode line near the end of the first pad, and the orthographic projection of the first ramp portion on the substrate lies within the orthographic projection of the support layer on the substrate; or The touch electrode line includes a second ramp portion, which covers the side step of the auxiliary electrode line near the first pad. The orthographic projection of the second ramp portion on the substrate is located within the orthographic projection of the support layer on the substrate.

9. The display panel according to claim 8, characterized in that, The orthographic projection of the side step on the substrate lies within the orthographic projection of the support layer on the substrate.

10. The display panel according to claim 7, characterized in that, Also includes: A source / drain metal layer is disposed on the side of the first touch layer away from the insulating layer and located in the display area. The source / drain metal layer is disposed in the same layer as the support layer.

11. The display panel according to claims 1-6 or any one of claims 8 to 10, characterized in that, Also includes: A cover layer is disposed on the side of the second touch layer away from the insulating layer; The touch electrode line includes a second ramp portion that covers the side step of the auxiliary electrode line near the first pad. The orthographic projection of the second ramp portion on the substrate is located within the orthographic projection of the cover layer on the substrate, and / or the orthographic projection of the side step on the substrate is located within the orthographic projection of the cover layer on the substrate.

12. The display panel according to claim 1, characterized in that, The touch electrode includes a plurality of first touch electrodes along a first direction and a second touch electrode along a second direction, the first direction intersecting the second direction, and adjacent first touch electrodes are electrically connected through the bridging portion, or adjacent second touch electrodes are electrically connected through the bridging portion. The touch electrode line includes a first touch electrode line and a second touch electrode line. The first pad includes a first sub-pad and a second sub-pad. One end of the first touch electrode line is electrically connected to the first touch electrode, and the other end of the first touch electrode line is electrically connected to the first sub-pad. One end of the second touch electrode line is electrically connected to the second touch electrode line, and the other end of the second touch electrode line is electrically connected to the second sub-pad. The auxiliary electrode line includes a first auxiliary electrode line and a second auxiliary electrode line. The first auxiliary electrode line is electrically connected to the first touch electrode line through the first via, and the second auxiliary electrode line is electrically connected to the second touch electrode line through the first via.

13. The display panel according to claim 1, characterized in that, The first touch layer includes the bridging portion, and the second touch layer includes the touch electrode; or, the first touch layer includes the touch electrode, and the second touch layer includes the bridging portion.

14. A display device, characterized in that, Includes the display panel as described in any one of claims 1-13.

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