Touch-control display panel and touch-control display apparatus

Abstract

Provided in the embodiments of the present disclosure are a touch-control display panel and a touch-control display apparatus. The touch-control display panel comprises: a substrate, a plurality of bonding terminals, a display structure, and a touch-control structure. The touch-control structure comprises: at least one first touch-control electrode, at least one second touch-control electrode, at least one first touch-control lead, and at least one second touch-control lead, wherein the first touch-control electrode is electrically connected to a bonding terminal by means of the first touch-control lead, the second touch-control electrode is electrically connected to a bonding terminal by means of the second touch-control lead, the first touch-control electrode and the second touch-control electrode extend in the same direction, and the shortest distance between the first touch-control electrode and the bonding terminal is greater than the shortest distance between the second touch-control electrode and the bonding terminal. At least one of the first touch-control leads comprises two trace layers, and at least some of the at least one of the second touch-control leads comprises a single trace layer.

Description

Touch display panel and touch display device Technical Field

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

[0002] Active-matrix organic light-emitting diode (AMOLED) displays have gained widespread attention due to their fast response time, high contrast ratio, and wide viewing angle. As a next-generation display technology, they have gradually replaced traditional LCD displays and are widely used in mobile phone screens, computer monitors, and other fields. Meanwhile, the new generation of touch displays integrates touch and display functions, enriching the ways users interact with the screen and enhancing the user experience.

[0003] Currently, flexible touch displays are formed using the Flex mesh layer on cell (FMLOC) method. The touch structure of this flexible touch display is integrated into the encapsulation layer of the flexible display substrate. The touch leads are transferred to the metal layer on the array substrate outside the display area through the transition hole, and then connected to the integrated circuit or flexible circuit board, thereby reducing the overall module thickness and cost. Summary of the Invention

[0004] This disclosure provides a touch display panel and a touch display device. The touch display panel has a display area and a peripheral area located around the display area; wherein, it includes:

[0005] Substrate;

[0006] Multiple bonding terminals are located in the surrounding area;

[0007] Display structure;

[0008] A touch structure is located on the side of the display structure opposite to the substrate; the touch structure includes: at least one first touch electrode, at least one second touch electrode, at least one first touch lead, and at least one second touch lead; at least a portion of the first touch electrode and the second touch electrode are located in the display area; the first touch lead and the second touch lead are located in the peripheral area; the first touch electrode is electrically connected to the bonding terminal through the first touch lead, and the second touch electrode is electrically connected to the bonding terminal through the second touch lead; the first touch electrode and the second touch electrode extend in the same direction, and the minimum distance between the first touch electrode and the bonding terminal is greater than the minimum distance between the second touch electrode and the bonding terminal;

[0009] Wherein, at least one of the first touch leads includes a double-layer trace, and at least a portion of at least one of the second touch leads includes a single-layer trace.

[0010] In one possible implementation, the touch structure includes: a plurality of second touch electrodes and a plurality of second touch leads;

[0011] The plurality of second touch electrodes include: a plurality of first sub-touch electrodes and a plurality of second sub-touch electrodes; the plurality of second touch leads include: a plurality of first sub-touch leads and a plurality of second sub-touch leads; the first sub-touch electrodes are electrically connected to the bonding terminal through the first sub-touch leads, and the second sub-touch electrodes are electrically connected to the bonding terminal through the second sub-touch leads; the minimum distance between the first sub-touch electrodes and the bonding terminal is greater than the minimum distance between the second sub-touch electrodes and the bonding terminal;

[0012] At least one of the first sub-touch leads includes a portion of double-layer routing and a portion of single-layer routing; at least one of the second sub-touch leads includes a single-layer routing.

[0013] In one possible implementation, the first sub-touch lead includes: a first trace segment and a second trace segment; the first trace segment and the second trace segment are arranged along the extension direction of the first sub-touch lead;

[0014] The first trace segment includes: a first sub-trace and a second sub-trace stacked together; the second trace segment includes: a third sub-trace; the first sub-trace and the second sub-trace are electrically connected through vias in the touch insulating layer.

[0015] The third sub-trace is on the same layer and made of the same material as either the first sub-trace or the second sub-trace.

[0016] In one possible implementation, the first sub-touch lead further includes: a third trace segment; the third trace segment is located on the side of the second trace segment away from the first trace segment in the extending direction of the first sub-touch lead; the third trace segment includes: a fourth sub-trace.

[0017] The third sub-trace is in the same layer and made of the same material as the second sub-trace; the fourth sub-trace is in the same layer and made of the same material as the first sub-trace.

[0018] In one possible implementation, the extension length of the first trace segment of the first sub-touch lead is positively correlated with the minimum distance between the first sub-touch electrode connected to the first sub-touch lead and the bonding terminal.

[0019] In one possible implementation, the third sub-trace is in the same layer and made of the same material as the first sub-trace.

[0020] In one possible implementation, the third sub-trace is in the same layer and made of the same material as the second sub-trace.

[0021] In one possible implementation, the second sub-touch lead includes a fifth sub-trace; the fifth sub-trace is in the same layer and material as one of the first sub-trace and the second sub-trace.

[0022] In one possible implementation, the first touch lead includes: a sixth sub-trace and a seventh sub-trace stacked together; the sixth sub-trace and the seventh sub-trace are electrically connected through vias in the touch insulating layer;

[0023] The sixth sub-trace is in the same layer and made of the same material as the first sub-trace; the seventh sub-trace is in the same layer and made of the same material as the second sub-trace.

[0024] In one possible implementation, the resistivity of the first sub-trace is greater than the resistivity of the second sub-trace.

[0025] In one possible implementation, the thickness of the first sub-trace in the direction perpendicular to the substrate is less than the thickness of the second sub-trace in the direction perpendicular to the substrate.

[0026] In one possible implementation, the maximum linewidth of the first touch lead perpendicular to the extension direction is greater than the maximum linewidth of the second touch lead perpendicular to and extending direction.

[0027] In one possible implementation, the touch structure further includes: a first access wiring portion and a second access wiring portion;

[0028] The first access trace is located at the junction of the first touch lead and the first touch electrode. The first touch lead is electrically connected to the first touch electrode through the first access trace. The extension direction of the first access trace is different from the extension direction of the first touch electrode. The second access trace is located at the junction of the second touch lead and the second touch electrode. The second touch lead is electrically connected to the second touch electrode through the second access trace.

[0029] Both the first access routing section and the second access routing section include double-layer routing.

[0030] In one possible implementation, at least a portion of the first touch lead includes: a first winding group connected to the first access wiring portion; the first winding group includes: at least one first winding portion, and a first connecting portion connected to at least one end of the first winding portion; in the same first winding group, the extension direction of the first winding portion is parallel to the extension direction of the first access wiring portion, and in the same first winding group, the arrangement direction of different first winding portions is perpendicular to the extension direction of the first access wiring portion; the extension direction of the first connecting portion is perpendicular to the extension direction of the first access wiring portion; the first access wiring portion and the first winding portion are connected through the first connecting portion, and / or, adjacent first winding portions are connected through the first connecting portion;

[0031] The number of the first winding portions of the first touch lead is inversely related to the distance between the first touch electrode electrically connected to the first touch lead and the bonding terminal.

[0032] In one possible implementation, at least a portion of the second touch lead includes: a second winding group connected to the second access wiring portion; the second winding group includes: at least one second winding portion, and a second connecting portion connected to at least one end of the second winding portion; in the same second winding group, the extension direction of the second winding portion is parallel to the extension direction of the second access wiring portion, and in the same second winding group, the arrangement direction of different second winding portions is perpendicular to the extension direction of the second access wiring portion; the extension direction of the second connecting portion is perpendicular to the extension direction of the second access wiring portion; the second access wiring portion and the second winding portion are connected through the second connecting portion, and / or adjacent second winding portions are connected through the second connecting portion.

[0033] In one possible implementation, the display structure includes: a first insulating layer; the first insulating layer includes: a plurality of recesses and at least one organic insulating portion; the recesses and the organic insulating portion are both located in the peripheral area, and the recesses, the organic insulating portion and the bonding terminal are located on the same side of the display area; the plurality of recesses are arranged along a first direction, and at least a portion of the organic insulating portion is located between two adjacent recesses; and the thickness of the recesses in the direction perpendicular to the substrate is less than the thickness of the insulating layer in the direction perpendicular to the substrate.

[0034] The touch structure further includes: multiple first traces and multiple second traces; the first traces, the second traces and the bonding terminal are located on the same side of the display area, and the first traces and the second traces extend along the first direction and are alternately arranged along the second direction; the orthographic projections of the first traces and the second traces on the substrate overlap with the orthographic projections of the recess and the organic insulating portion on the substrate; the first traces and the second traces are located in different layers.

[0035] In one possible implementation, at least one of the first touch lead and the second touch lead includes at least one of the following:

[0036] First trace;

[0037] The second routing.

[0038] In one possible implementation, the minimum spacing between adjacent first and second traces ranges from 6 μm to 15 μm.

[0039] In one possible implementation, the display structure includes: a plurality of signal lines located between the first insulating layer and the substrate; the signal lines include: a first signal trace segment extending along the second direction.

[0040] In one possible implementation, the first signal line includes a first power line and / or a second power line, wherein the voltage applied to the first power line is less than the voltage applied to the second power line.

[0041] In one possible implementation, the first insulating layer includes: a planarization layer, and / or a pixel definition layer, and / or an encapsulation layer.

[0042] In one possible implementation, the touch structure includes: a driving electrode, a sensing electrode, a driving lead, and a sensing lead; the driving electrode is electrically connected to the bonding terminal via the driving lead; the sensing electrode is electrically connected to the bonding terminal via the sensing lead.

[0043] At least one of the driving electrode and the sensing electrode includes the first touch electrode and the second touch electrode; at least one of the driving lead and the sensing lead includes the first touch lead and the second touch lead.

[0044] This disclosure also provides a touch display device, which includes the touch display panel as described in this disclosure. Attached Figure Description

[0045] Figure 1 is a cross-sectional schematic diagram of the touch display panel in the display area provided in an embodiment of this disclosure;

[0046] Figure 2 is a schematic diagram of the touch electrodes of the display area provided in an embodiment of this disclosure;

[0047] Figure 3 is a schematic diagram of a touch display panel provided in an embodiment of this disclosure;

[0048] Figure 4A can be an enlarged schematic diagram corresponding to the dashed box S1 in Figure 3;

[0049] Figure 4B can be a cross-sectional view of Figure 4A at the dashed line e1;

[0050] Figure 4C can be a cross-sectional view of Figure 4A at the dashed line e2;

[0051] Figure 4D can be an enlarged schematic diagram corresponding to the dashed box S2 in Figure 3;

[0052] Figure 4E can be an enlarged schematic diagram of the other type of figure 3 at the dashed box S1;

[0053] Figure 4F can be a schematic diagram of the cross section at the dashed line e3 in Figure 4E;

[0054] Figure 4G can be a schematic diagram of the cross section at the dashed line e4 in Figure 4E;

[0055] Figure 4H can be another enlarged schematic diagram corresponding to the dashed box S2 in Figure 3;

[0056] Figure 4I can be an enlarged schematic diagram of Figure 4A at the first winding group;

[0057] Figure 4J can be an enlarged schematic diagram of Figure 4A at the second winding group F2;

[0058] Figure 5A can be an enlarged schematic diagram corresponding to the dashed box S3 in Figure 3;

[0059] Figure 5B can be a cross-sectional view of Figure 5A at the dashed line e5;

[0060] Figure 5C can be a cross-sectional view of Figure 5A at the dashed line e6;

[0061] Figure 5D can be a cross-sectional view of Figure 5A at the dashed line e12;

[0062] Figure 5E can be an enlarged schematic diagram corresponding to the dashed box S3 in Figure 3;

[0063] Figure 5F can be a schematic diagram of the cross section at the dashed line e7 in Figure 5E;

[0064] Figure 5G can be a schematic diagram of the cross section at the dashed line e8 of Figure 5E;

[0065] Figure 5H can be a schematic diagram of the cross section at the dashed line e13 in Figure 5E;

[0066] Figure 6A can be an enlarged schematic diagram corresponding to the dashed box S3 in Figure 3;

[0067] Figure 6B can be a cross-sectional view of Figure 6A at the dashed line e9;

[0068] Figure 6C can be a cross-sectional view of Figure 6A at the dashed line e10;

[0069] Figure 6D can be a cross-sectional view of Figure 6A at the dashed line e11;

[0070] Figure 7A can be seen as an enlarged schematic diagram of Figure 3 at the dashed frame S4;

[0071] Figure 7B can be a schematic diagram of the cross section at the dashed line f1 in Figure 7A;

[0072] Figure 7C can be a schematic diagram of the cross section at the dashed line f1 in Figure 7A;

[0073] Figure 8A is one of the structural schematic diagrams of a touch display panel;

[0074] Figure 8B is a second schematic diagram of the structure of the touch display panel;

[0075] Figure 8C is the third structural schematic diagram of the touch display panel;

[0076] Figure 8D is the fourth structural schematic diagram of the touch display panel. Detailed Implementation

[0077] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, 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, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0078] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0079] As used herein, “approximately” or “substantially the same” includes the stated value and means within an acceptable range of deviations from the specific value, as determined by a person skilled in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., limitations of the measurement system). For example, “substantially the same” may mean a difference relative to the stated value within one or more standard deviations, or within ±30%, 20%, 10%, or 5%.

[0080] In the accompanying drawings, the thicknesses of layers, films, panels, regions, etc., are enlarged for clarity. Exemplary embodiments are described herein with reference to cross-sectional views that are schematic diagrams of idealized embodiments. Thus, deviations from the shapes shown in the drawings will be expected as a result of, for example, manufacturing techniques and / or tolerances. Therefore, the embodiments described herein should not be construed as limited to the specific shapes of the regions shown herein, but rather include deviations in shape caused, for example, by manufacturing processes. For example, regions illustrated or described as flat may typically have rough and / or non-linear characteristics. Furthermore, sharp corners illustrated may be rounded. Thus, the regions shown in the figures are schematic in nature, and their shapes are not intended to illustrate the precise shapes of the regions, nor are they intended to limit the scope of the claims.

[0081] To keep the following description of the embodiments of this disclosure clear and concise, detailed descriptions of known functions and known components are omitted.

[0082] This disclosure provides a touch display panel using FMLOC technology, where the touch structure is directly fabricated on top of the stacked display structure and encapsulation layer. This reduces the thickness of the touch display panel, facilitating the thinning and lightening of touch display products. As shown in Figure 1, the display structure may include: a driving circuit layer 7 located on one side of the substrate 1, a light-emitting device 9 located on the side of the driving circuit layer 7 facing away from the substrate 1, an encapsulation layer 10 located on the side of the light-emitting device 9 facing away from the substrate 1, and a touch structure 6 located on the side of the encapsulation layer 10 facing away from the substrate 1.

[0083] In some embodiments, as shown in FIG1, the light-emitting device 9 includes an anode 901, a light-emitting layer 902, and a cathode 903 stacked together.

[0084] In a specific implementation, if the light-emitting device is an organic light-emitting diode, the light-emitting layer 902 includes at least an organic light-emitting layer, and may also include a light-emitting functional layer, which includes at least one of the following: an electron injection layer, a hole blocking layer, an electron transport layer, a hole transport layer, an electron blocking layer, and a hole injection layer.

[0085] In some embodiments, as shown in FIG1, the driving circuit layer 7 includes a pixel driving circuit that corresponds one-to-one with the light-emitting device 9 and drives the light-emitting device 9 to emit light; the pixel driving circuit includes, for example, a thin-film transistor (TFT) and a capacitor (not shown). The light-emitting device 9 may be, for example, an organic light-emitting diode (OLED) or a quantum dot OLED.

[0086] It should be noted that Figure 1 uses a thin-film transistor (TFT) with a top-gate structure as an example, where the gate G is located on the side of the active layer 701 facing away from the substrate 1. The multilayer insulating layer 4 includes: a first buffer layer 401 between the substrate 1 and the active layer 701; a first gate insulating layer 402 between the gate G and the active layer 701; an interlayer insulating layer 403 between the gate G and the source S and drain D; a passivation layer 407 between the interlayer insulating layer 403 and the source S and drain D; and a passivation layer 407 between the source S and drain D. The first planarization layer 404 between the drain D and the anode 901, and the pixel definition layer 408 located on the side of the anode 901 away from the substrate 1; the pixel definition layer 408 includes a plurality of opening regions 4081, the pixel definition layer 408 covers the edge of the anode 901, the orthographic projection of the opening region 4081 on the substrate 1 falls into the orthographic projection of the anode 901 on the substrate 1, the light-emitting functional layer is located on the side of the anode 901 and the pixel definition layer 408 away from the substrate 1, and the cathode 903 is located on the side of the light-emitting functional layer away from the substrate 1.

[0087] In some embodiments, the anode 901 is connected to the drain D through a via penetrating the first planarization layer 404.

[0088] Alternatively, to avoid the risk of a short circuit between the anode 901 and the drain D, in some embodiments, as shown in FIG1, the touch display panel further includes a first transition electrode 702 located between the first planarization layer 404 and the anode 901, and a second transition electrode 703 located between the first transition electrode 702 and the anode 901.

[0089] The multilayer insulating layer 4 includes: a second planarization layer 405 located between the second transition electrode 703 and the first transition electrode 702, and a third planarization layer 406 located between the second transition electrode 703 and the anode 901. The anode 901 is connected to the second transition electrode 703 through a via penetrating the third planarization layer 406, the second transition electrode 703 is electrically connected to the first transition electrode 702 through a via penetrating the second planarization layer 405, and the first transition electrode 702 is connected to the drain electrode D through a via penetrating the first planarization layer 404.

[0090] In some embodiments, the multilayer insulating layer 4 further includes a spacer layer located on the side of the pixel definition layer 408 opposite to the substrate 1.

[0091] In some embodiments, as shown in FIG1, the encapsulation layer 10 includes a first inorganic encapsulation layer 1001, an organic encapsulation layer 1002, and a second inorganic encapsulation layer 1003 stacked together. The barrier in the peripheral area is used to prevent the organic encapsulation material from overflowing.

[0092] In some embodiments, as shown in FIG1, the touch structure 6 specifically includes: a second buffer layer 601 located on the side of the encapsulation layer 10 away from the substrate 1, a first touch conductive layer 602 located on the side of the second buffer layer 601 away from the substrate 1, a touch insulating layer 603 located on the side of the first touch conductive layer 602 away from the substrate 1, a second touch conductive layer 604 located on the side of the touch insulating layer 603 away from the substrate 1, and a protective layer 605 located on the side of the second touch conductive layer 604 away from the substrate 1.

[0093] In some embodiments, the first touch conductive layer 602 and the second touch conductive layer 604 include a metal mesh structure composed of interwoven metal wires.

[0094] In specific implementations, the metal mesh structure is formed by interlacing multiple metal wires, resulting in a metal mesh structure comprising multiple meshes. Each mesh is a polygon composed of multiple metal wires, or in other words, the metal mesh is formed by repeating and continuously splicing meshes. The shape of the mesh formed by the metal wires can be rhomboid. Alternatively, the shape of the mesh formed by the metal wires can be triangular, rectangular, hexagonal, etc., or a combination of multiple shapes, such as a combination of pentagons and hexagons. The shape of the mesh formed by the metal wires can include any one or more of triangles, squares, rectangles, rhombuses, trapezoids, pentagons, and hexagons. In specific implementations, the mesh pattern formed by the metal wires can be a regular shape or an irregular shape, and the edges of the mesh can be straight lines or curves; this disclosure does not limit the specific shapes. The edges of the metal mesh structure may also include incomplete mesh patterns.

[0095] In practical implementation, multiple cuts can be set on the grid. For parts that are located in the same layer of the touch conductive layer and need to be insulated from each other, such as when the grid of the driving electrode and the grid of the sensing electrode are located in the same layer, cuts can be set on the grid pattern set on the whole surface to achieve isolation between the grid of the driving electrode and the grid of the sensing electrode.

[0096] The touch electrodes provided in this embodiment include a metal mesh structure. The first and second touch electrodes in the form of a metal mesh structure have advantages such as low resistance, small thickness, and fast response speed. This can improve the sensitivity and accuracy of touch recognition.

[0097] In some embodiments, the shape, size, and line width of the mesh in the first touch conductive layer and the mesh in the second touch conductive layer can be consistent.

[0098] In some embodiments, in the display area AA, the multilayer touch conductive layer includes a plurality of touch electrodes, as shown in FIG2, the plurality of touch electrodes include a plurality of driving electrodes 11 and a plurality of sensing electrodes 12.

[0099] Multiple driving electrodes 11 are arranged along a first direction X and extend along a second direction Y. Each driving electrode 11 includes multiple first sub-electrodes 1101 arranged along the second direction Y, and a bridging electrode 1102 electrically connecting two adjacent first sub-electrodes 1101.

[0100] Multiple sensing electrodes 12 extend along a first direction X and are arranged along a second direction Y; the sensing electrodes 12 include multiple second sub-electrodes 1201 arranged along the first direction X.

[0101] In some embodiments, as shown in FIG2, the first sub-electrode 1101 and the second sub-electrode 1201 are located in the second touch conductive layer 604, and the bridging electrode 1102 is located in the first touch conductive layer 602; in a specific implementation, the bridging electrode 1102 is electrically connected to the first sub-electrode 1101 through a through-hole penetrating the touch insulating layer.

[0102] In other embodiments, the plurality of driving electrodes 11 may extend along the first direction X and be arranged along the second direction Y, and the plurality of sensing electrodes 12 may be arranged along the first direction X and extend along the second direction Y.

[0103] In some embodiments, the touch structure may further include multiple touch leads; the multiple touch leads may include multiple driving leads and sensing leads.

[0104] In some embodiments, referring to FIG3, the touch display panel includes: a display area AA and a peripheral area BB. The peripheral area BB includes a first peripheral area BB1 and a second peripheral area BB2 other than the first peripheral area BB1. The first peripheral area BB1 also includes a plurality of bonding terminals 14. The plurality of bonding terminals 14 are used for bonding with a control chip IC. One end of the touch lead (since the touch leads in the peripheral area BB are relatively dense, the area where the touch leads are located is shown in gray in FIG3) is electrically connected to the bonding terminal, and the other end of the touch lead is electrically connected to the touch electrode (not shown). Specifically, the driving electrode can be electrically connected to some of the bonding terminals through the driving lead, and the sensing electrode can be electrically connected to other of the bonding terminals through the sensing lead.

[0105] With the current emphasis on "high screen-to-body ratio," display bezels are gradually shrinking, reducing the wiring space for touch leads. Optimizing touch lead resistance in related technologies increases the required wiring space for the touch leads. Furthermore, variations in the distance between touch leads and the control chip IC lead to differences in impedance between different touch leads.

[0106] For example, referring to Figures 8A-8D, for the 1T1R symmetrical trace shown in Figure 8A, the grid line filling area can be the area or part of the driving lead corresponding to the driving electrode (Tx), and the diagonal line filling area can be the area or part of the sensing lead corresponding to the driving lead corresponding to the sensing electrode (Rx). The touch structure includes two touch lead groups (each touch lead group includes a driving lead and a sensing lead). The touch lead on the left is connected to multiple bonding terminals on the lower left, and the touch lead on the right is connected to multiple bonding terminals on the lower right. For the driving electrode (Tx) corresponding to... The driving leads are arranged in a series of parameters. For each group of driving leads, the driving lead with the driving electrode (Tx) at the edge region has the highest impedance, while the driving lead with the driving electrode (Tx) in the middle region has the lowest impedance. The impedance difference between different driving leads is relatively large and needs to be compensated. For the driving leads corresponding to the sensing electrodes (Rx), the sensing lead with the lowest impedance in the lower edge region of the right touch trace group, which is closer to the bonding terminal, has the lowest impedance, while the sensing lead with the highest impedance in the upper left region of the left touch trace group, which is farther from the bonding terminal. The impedance difference between different sensing leads is relatively large and needs to be compensated.

[0107] For example, in the 1T1R asymmetric trace shown in Figure 8B, the grid line filling area can be the area or part of the driving leads corresponding to the driving electrode (Tx), and the diagonal line filling area can be the area or part of the sensing leads corresponding to the driving lead corresponding to the sensing electrode (Rx). The touch structure includes two sets of touch leads: the driving lead group corresponding to the driving electrode (Tx) located in the lower edge area, and the driving lead group corresponding to the sensing electrode (Rx) located on the right side. The driving lead group in the lower edge area is connected to multiple bonding terminals on the lower left side, and the driving lead group on the right side is connected to... The drive leads are connected to multiple bonding terminals on the lower right side. For the drive leads corresponding to the drive electrodes (Tx), the drive leads at the right edge region have the highest impedance, while the drive leads in the middle region (closer to the bonding terminals on the left) have the lowest impedance. The impedance differences between different drive leads are significant and require compensation. For the drive leads corresponding to the sensing electrodes (Rx), the sensing leads in the lower right region have the lowest impedance, while the sensing leads in the upper left and upper right regions have the highest impedance. The impedance differences between different sensing leads are significant and require compensation.

[0108] For example, in the 2T1R trace of the large foldable screen shown in Figure 8C, the diagonal line filling area can be the area or part of the driving leads corresponding to the driving electrode (Tx), and the grid line filling area can be the area or part of the sensing leads corresponding to the driving leads corresponding to the sensing electrode (Rx). The touch structure includes two sets of touch leads (each set includes driving leads and sensing leads). The left touch lead set is connected to multiple bonding terminals on the lower left side, and the right touch lead set is connected to multiple bonding terminals on the lower right side. For the driving... For the driving leads corresponding to the electrodes (Tx), in each group of driving leads, the driving lead with the highest impedance is located at the upper edge region, while the driving lead with the lowest impedance is located at the lower edge region. The impedance difference between different driving leads is significant and requires compensation. For the driving leads corresponding to the sensing electrodes (Rx), in each group of driving leads, the sensing lead with the highest impedance is located at the edge region, while the sensing lead with the lowest impedance is located at the middle region. The impedance difference between different sensing leads is significant and requires compensation.

[0109] For example, for the 2T1R trace shown in Figure 8D, the grid line filling area can be the area or part of the driving leads corresponding to the driving electrode (Tx), and the diagonal line filling area can be the area or part of the sensing leads corresponding to the sensing electrode (Rx). The touch structure includes two sets of driving lead groups corresponding to the driving electrodes (Tx): the driving lead group corresponding to the driving electrode (Tx) located in the lower edge area, and the driving lead group corresponding to the driving electrode (Tx) located in the left and upper edge areas. The touch structure also includes the driving lead group corresponding to the sensing electrode (Rx) located in the right edge area. The two sets of driving lead groups are connected to multiple bonding terminals on the lower left side, and the sensing lead group on the right side is connected to multiple bonding terminals on the lower right side. For the driving leads corresponding to the driving electrodes (Tx), in the lower edge area, the driving lead closest to the bonding terminal in the middle of the left side has the lowest impedance, and the driving lead in the lower right edge area has the highest impedance. In the upper edge area, the driving lead (up TX) at the upper left edge has the lowest impedance, and the driving lead (up TX) at the upper right edge has the highest impedance. The impedance of the TX is the largest, and the impedance difference between different driving leads is large, so compensation is required. For the driving leads corresponding to the sensing electrode (Rx), the impedance of the sensing lead at the lower right edge is the smallest, and the impedance of the sensing lead at the upper right edge is the largest. The impedance difference between different sensing leads is large, so compensation is required.

[0110] In view of the above, this disclosure provides a touch display panel, as shown in Figures 4A-4H, 5A-5H, and 6A-6D. Figure 4A can be an enlarged view corresponding to the dashed frame S1 in Figure 3; Figure 4B can be a cross-sectional view of Figure 4A at the dashed line e1; Figure 4C can be a cross-sectional view of Figure 4A at the dashed line e2; Figure 4D can be an enlarged view corresponding to the dashed frame S2 in Figure 3; Figure 4E can be another enlarged view corresponding to the dashed frame S1 in Figure 3; Figure 4F can be a cross-sectional view of Figure 4E at the dashed line e3; Figure 4G can be a cross-sectional view of Figure 4E at the dashed line e4; Figure 4H can be another enlarged view corresponding to the dashed frame S2 in Figure 3; Figure 5A can be a cross-sectional view of Figure 3 at the dashed frame S3. Figure 5B can be a cross-sectional view of Figure 5A at the dashed line e5, Figure 5C can be a cross-sectional view of Figure 5A at the dashed line e6, Figure 5D can be a cross-sectional view of Figure 5A at the dashed line e12, Figure 5E can be a cross-sectional view of Figure 3 at the dashed box S3, Figure 5F can be a cross-sectional view of Figure 5E at the dashed line e7, Figure 5G can be a cross-sectional view of Figure 5E at the dashed line e8, Figure 5H can be a cross-sectional view of Figure 5E at the dashed line e13, Figure 6A can be a cross-sectional view of Figure 3 at the dashed box S3, Figure 6B can be a cross-sectional view of Figure 6A at the dashed line e9, Figure 6C can be a cross-sectional view of Figure 6A at the dashed line e10, and Figure 6D can be a cross-sectional view of Figure 6A at the dashed line e11.

[0111] The touch structure 6 includes: at least one first touch electrode 61, at least one second touch electrode 62, at least one first touch lead 610, and at least one second touch lead 620; at least a portion of the first touch electrode 61 and the second touch electrode 62 are located in the display area AA; the first touch lead 610 and the second touch lead 620 are located in the peripheral area BB; the first touch electrode 61 is electrically connected to the bonding terminal 14 through the first touch lead 610, and the second touch electrode 62 is electrically connected to the bonding terminal 14 through the second touch lead 620; the first touch electrode 61 and the second touch electrode 62 extend in the same direction, and the minimum distance between the first touch electrode 61 and the bonding terminal 14 is greater than the minimum distance between the second touch electrode 62 and the bonding terminal 14; that is, the first touch electrode 61 can be an electrode farther away from the bonding terminal 14, and the second touch electrode 62 can be an electrode closer to the bonding terminal 14;

[0112] At least one first touch lead 610 includes double-layer routing, and at least a portion of at least one second touch lead includes single-layer routing.

[0113] In this embodiment, at least one first touch lead 610 includes a double-layer trace, and at least a portion of at least one second touch lead includes a single-layer trace. That is, by setting the first touch lead 610, which is electrically connected to the first touch electrode 61 farther from the bonding terminal 14, as a double-layer trace, and setting at least a portion of the second touch lead 620, which is electrically connected to the second touch electrode 62 closer to the bonding terminal 14, as a single-layer trace, the impedance of the near-end second touch lead 620 can be increased, balancing the impedances of different touch leads at the near and far ends. Moreover, compared to conventionally increasing the impedance of the near-end second touch lead 620 by winding wires, this increases the wiring space required for the lower bezel of the display panel and may cause the touch lead portion at the lower bezel to be partially isolated in the display structure. At the boundary region of the insulating layer, where the thickness of the insulating layer varies significantly, some metal residue may remain during the etching process to form the touch leads in this region. This could lead to connections between adjacent touch leads and / or breakage of the touch leads, resulting in touch malfunctions. In this embodiment, by setting at least a portion of the near-end second touch lead 620 as a single-layer trace, the wiring space required for the second touch lead 620 due to winding can be reduced. This is beneficial for narrowing the bezel of the display panel and also reduces the probability of touch malfunctions caused by connections between adjacent touch leads due to the touch leads being located at the edge region of the insulating layer. On the other hand, the saved wiring space is beneficial for increasing the linewidth of the far-end first touch lead 610, which further helps to balance the impedance of different touch leads at the near and far ends.

[0114] Optionally, the touch display panel may include multiple bonding terminals 14. A first touch electrode 61 can be electrically connected to one of the bonding terminals 14 via a corresponding first touch lead 610. Similarly, a second touch electrode 62 can be electrically connected to another bonding terminal 14 via a corresponding second touch lead 620. When both the first touch electrode 61 and the second touch electrode 62 extend along the second direction Y, the minimum distance between the first touch electrode 61 and the bonding terminal 14 can be the minimum distance between the end of the first touch electrode 61 facing the bonding terminal 14 and the corresponding bonding terminal 14. The second touch electrode 62 and... The minimum distance between the binding terminal 14 can be the minimum distance between the end of the second touch electrode 62 facing the binding terminal 14 and the corresponding binding terminal 14. When both the first touch electrode 61 and the second touch electrode 62 extend along the first direction X, the minimum distance between the first touch electrode 61 and the binding terminal 14 can be the minimum distance between the side of the end of the first touch electrode 61 facing the binding terminal 14 and the corresponding binding terminal 14. The minimum distance between the second touch electrode 62 and the binding terminal 14 can be the minimum distance between the side of the second touch electrode 62 facing the binding terminal 14 and the corresponding binding terminal 14.

[0115] In one possible implementation, at least one of the driving electrode 11 (Tx) and the sensing electrode 12 (Rx) includes a first touch electrode 61 and a second touch electrode 62; at least one of the driving lead and the sensing lead includes a first touch lead 610 and a second touch lead 620. That is, the first touch electrode 61 and the second touch electrode 62 can be some electrodes of the same type of touch electrode. For example, the first touch electrode 61 and the second touch electrode 62 can be some electrodes of the driving electrode 11 (Tx); or, for example, the first touch electrode 61 and the second touch electrode 62 can be some electrodes of the sensing electrode 12 (Rx).

[0116] In one possible implementation, referring to Figures 5A-5H and 6A-6D, the touch structure 6 includes: multiple second touch electrodes 62 and multiple second touch leads 620; the multiple second touch electrodes 62 include: multiple first sub-touch electrodes 62a and multiple second sub-touch electrodes 62b; the multiple second touch leads 620 include: multiple first sub-touch leads 620a and multiple second sub-touch leads 620b; the first sub-touch electrodes 62a are electrically connected to the bonding terminal 14 via the first sub-touch leads 620a, and the second... The sub-touch electrode 62b is electrically connected to the bonding terminal 14 via the second sub-touch lead 620b; the minimum distance between the first sub-touch electrode 62a and the bonding terminal 14 is greater than the minimum distance between the second sub-touch electrode 62b and the bonding terminal 14; that is, the second sub-touch electrode 62b that is closest to the bonding terminal 14 can be designated as the second sub-touch electrode 62b, and the corresponding touch lead can be designated as the second sub-touch lead 620b; the second sub-touch electrode 62b that is next to the bonding terminal 14 can be designated as the first sub-touch electrode 62a, and the corresponding touch lead can be designated as the first sub-touch lead 620a.

[0117] At least one first sub-touch lead 620a includes a portion of double-layer routing and a portion of single-layer routing; at least one second sub-touch lead 620b includes a single-layer routing.

[0118] In this embodiment, by setting the second sub-touch lead 620b, which is electrically connected to the second sub-touch electrode 62b closest to the bonding terminal 14, as a single-layer trace, and setting the first sub-touch lead 620a, which is electrically connected to the first sub-touch electrode 62a next closest to the bonding terminal 14, as having part of a single-layer trace and part of a double-layer trace, the impedance of different touch leads at the near and far ends can be further balanced, the wiring space increased due to winding can be reduced, which is beneficial for narrowing the bezel of the display panel and reducing the probability of touch abnormalities.

[0119] In one possible implementation, referring to Figures 5A-5H and 6A-6D, the first sub-touch lead 620a includes: a first trace segment 620a1 and a second trace segment 620a2; the first trace segment 620a1 and the second trace segment 620a2 are arranged along the extension direction of the first sub-touch lead 620a; the first trace segment 620a1 includes: a first sub-trace T1 and a second sub-trace T2 stacked together; the first sub-trace T1 and the second sub-trace T2 are electrically connected through vias in the touch insulating layer 603; the second trace segment 620a2 includes: a third sub-trace T3; the third sub-trace T3 is in the same layer and made of the same material as one of the first sub-trace T1 and the second sub-trace T2.

[0120] In this embodiment of the disclosure, for the same first sub-touch lead 620a, some are configured as double-layer traces and some are configured as single-layer traces. Furthermore, the single-layer traces and one of the layers of the double-layer traces are made of the same material. This can achieve the trace continuity of the first sub-touch lead 620a and reduce the manufacturing difficulty and cost of the first sub-touch lead 620a.

[0121] In one possible implementation, as shown in Figures 5A-5H and 6A-6D, the second sub-line T2 may be located on the side of the first sub-line T1 away from the substrate 1; the first sub-line T1 may be located in the first touch conductive layer 602, and the second sub-line T2 may be located in the second touch conductive layer 604.

[0122] In one possible implementation, the resistivity of the first sub-trace T1 is greater than the resistivity of the second sub-trace T2. Optionally, the resistivity of the first sub-trace T1 can be 1.2 to 5 times the resistivity of the second sub-trace T2. Optionally, the resistivity of the first sub-trace T1 can be 1.5 to 2.5 times the resistivity of the second sub-trace T2. Optionally, the resistivity of the first sub-trace T1 can be 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, or 2.5 times the resistivity of the second sub-trace T2.

[0123] In practical implementation, the resistivity of the first sub-trace T1 and the second sub-trace T2 can be controlled by adjusting their thicknesses. For example, in one possible implementation, as shown in Figure 5B, the thickness d1 of the first sub-trace T1 in the direction perpendicular to the substrate 1 is less than the thickness d2 of the second sub-trace T2 in the same direction. Optionally, the thickness d2 of the second sub-trace T2 in the direction perpendicular to the substrate 1 can be 1.2 to 5 times the thickness d1 of the first sub-trace T1 in the same direction. Optionally, the thickness d2 of the second sub-trace T2 in the direction perpendicular to the substrate 1 can be 1.5 to 2.5 times the thickness d1 of the first sub-trace T1 in the same direction. Optionally, the thickness d2 of the second sub-trace T2 in the direction perpendicular to the substrate 1 can be 1.5 times, 1.6 times, 1.7 times, 1.8 times, 1.9 times, 2.0 times, 2.1 times, 2.2 times, 2.3 times, 2.4 times, or 2.5 times the thickness d1 of the first sub-trace T1 in the direction perpendicular to the substrate 1.

[0124] In one possible implementation, for the first trace segment 620a1 of the double layer, the second sub-trace T2 can be electrically connected to the first sub-trace T1 through a via penetrating the touch insulating layer 603 at a certain location, so that the first sub-trace T1 and the second sub-trace T2 are connected in parallel, which can reduce the impedance of the first trace segment 620a1.

[0125] In one possible implementation, as shown in Figures 5A-5C, the third sub-trace T3 is in the same layer and with the same material as the second sub-trace T2; in another possible implementation, as shown in Figures 5E-5G, the third sub-trace T3 is in the same layer and with the same material as the first sub-trace T1.

[0126] In one possible implementation, as shown in Figures 5A-5H and 6A-6D, the first trace segment 620a1 is located on the side of the second trace segment 620a2 closest to the first sub-touch electrode 62a. That is, when the touch lead is drawn from the first sub-touch electrode 62a, a double-layer first trace segment 620a1 is first set, followed by a single-layer second trace segment 620a2. Since the touch electrodes (first touch electrode 61 or second touch electrode 62) of the display area AA use metal traces with low resistivity, after exiting the display area AA, the touch lead first uses a double-layer first trace segment 620a1, followed by a single-layer second trace segment 620a2. This allows the touch lead to be directly connected to the touch electrode, and in areas where increased resistance is required, a single-layer trace can be used directly, reducing or avoiding the need for jump-hole layering design of the touch lead.

[0127] In one possible implementation, referring to Figures 6A-6D, the first sub-touch lead 620a further includes: a third trace segment 620a3; in the extension direction along the first sub-touch lead 620a, the third trace segment 620a3 is located on the side of the second trace segment 620a2 away from the first trace segment 620a1; the third trace segment 620a3 includes: a fourth sub-trace T4; the third sub-trace T3 is in the same layer and material as the second sub-trace T2; the fourth sub-trace T4 is in the same layer and material as the first sub-trace T1.

[0128] In this embodiment, the first sub-touch lead 620a further includes a third routing segment 620a3. That is, within the same first sub-touch lead 620a, a double-layer routing segment can be provided, or two single-layer routing segments of different layers can be provided. This allows for further refinement of impedance adjustment, enabling more diverse adjustments between different touch leads, further balancing the impedance of different touch leads at near and far ends, reducing the wiring space increased by winding, which is beneficial for narrowing the bezel of the display panel and reducing the probability of touch abnormalities. Moreover, in this embodiment, since the touch electrodes in the display area use low-resistivity metal routing... The third trace segment 620a3 is located on the side of the second trace segment 620a2 away from the first trace segment 620a1. That is, when the touch lead is led out from the first sub-touch electrode 62a, the double-layer trace with lower resistance is run first, then the second trace segment 620a2 with lower resistivity is run, and then the third trace segment 620a3 with higher resistivity is run. After coming out from the display area AA, the touch lead first adopts double-layer trace. The use of double-layer trace can directly connect the touch lead to the touch electrode. In areas where impedance needs to be increased, traces with low or high resistivity can be used according to the actual impedance requirements, reducing or avoiding the jump hole and layer change design of the touch lead.

[0129] In one possible implementation, referring to Figures 5A, 5E, and 6A, the extension length of the first trace segment 620a1 of the first sub-touch lead 620a is positively correlated with the minimum distance between the first sub-touch electrode 62a connected to the first sub-touch lead 620a and the bonding terminal 14. This facilitates achieving approximately equal impedances for each of the first sub-touch leads 620a. For example, as shown in Figure 5A, the N1st first sub-touch lead 620a is connected to the M1st first sub-touch electrode 62a, and the N2nd first sub-touch lead 620a is connected to the M2nd first sub-touch electrode 62a. Among the M1st and M2nd first sub-touch electrodes 62a, the M1st first sub-touch electrode 62a is farther from the bonding terminal. Therefore, among the N1st and N2nd first sub-touch leads 620a, the extension length of the first trace segment 620a1 of the N1st first sub-touch lead 620a is longer. This allows the N1st first sub-touch lead 620a to pass through the first trace segment 620a1, reducing the larger impedance caused by the N1st first sub-touch lead 620a being located further out and having a longer trace.

[0130] In one possible implementation, referring to Figures 5A-5H and 6A-6D, the second sub-touch lead 620b includes a fifth sub-trace T5; the fifth sub-trace T5 is in the same layer and made of the same material as one of the first sub-trace T1 and the second sub-trace T2. Optionally, as shown in Figures 5B and 5D, the fifth sub-trace T5 is in the same layer and made of the same material as the first sub-trace T1; alternatively, as shown in Figures 5F and 5H, the fifth sub-trace T5 is in the same layer and made of the same material as the second sub-trace T2.

[0131] In one possible implementation, as shown in Figures 4A-4H, 5A-5H, and 6A-6D, the first touch lead 610 includes: a sixth sub-trace T6 and a seventh sub-trace T7 stacked together; the sixth sub-trace T6 and the seventh sub-trace T7 are connected through vias in the touch insulating layer 603; the sixth sub-trace T6 is in the same layer and material as the first sub-trace T1; and the seventh sub-trace T7 is in the same layer and material as the second sub-trace T2.

[0132] In one possible implementation, as shown in FIG6A, the maximum linewidth g1 of the first touch lead 610 perpendicular to the extension direction is greater than the maximum linewidth g2 of the second touch lead 620 perpendicular to and extending in the same direction. In this embodiment of the present disclosure, by setting a larger maximum linewidth for the first touch lead 610 corresponding to the first touch electrode 61 which is farther from the bonding terminal 14, the larger linewidth of the first touch lead 610 can reduce the larger impedance caused by the first touch lead 610 being located further out and having a longer trace, thereby balancing the impedance differences between the different touch leads.

[0133] In one possible implementation, as shown in Figures 4A, 4D, 4E, 4H, 5A, 5E, and 6A, the touch structure further includes: a first access wiring portion 6100 and a second access wiring portion 6200; the first access wiring portion 6100 is located at the junction of the first touch lead 610 and the first touch electrode 61, and the first touch lead 610 is electrically connected to the first touch electrode 61 through the first access wiring portion 6100; the second access wiring portion 6200 is located at the junction of the second touch lead 620 and the second touch electrode 62, and the second touch lead 620 is electrically connected to the second touch electrode 62 through the second access wiring portion 6200; both the first access wiring portion 6100 and the second access wiring portion 6200 include double-layer wiring.

[0134] In this embodiment, the first access trace 6100 connecting the first touch lead 610 and the first touch electrode 61, and the second access trace 6200 connecting the second touch lead 620 and the second touch electrode 62, are both configured as double-layer traces, which can be directly connected to the touch electrode of the display area (the touch electrode of the display area is made of a metal with low resistivity), reducing or avoiding the design of skip-hole layer replacement for the touch lead.

[0135] In one possible implementation, as shown in Figures 4A, 4D, 4E, 4H, 5A, 5E, and 6A, the extension direction of the first access trace 6100 may be different from the extension direction of the connected first touch electrode 61, and the extension direction of the second access trace 6200 may be different from the extension direction of the connected second touch electrode 62; optionally, the extension direction of the first access trace 6100 may be perpendicular to the extension direction of the connected first touch electrode 61, and the extension direction of the second access trace 6200 may be perpendicular to the extension direction of the connected second touch electrode 62.

[0136] In one possible implementation, referring to Figures 4A and 4I, where Figure 4I can be an enlarged schematic diagram of Figure 4A at the first winding group F1, at least a portion of the first touch lead 61 includes: a first winding group F1 connected to the first access wiring portion 6100; the first winding group F1 includes: at least one first winding portion F11, and a first connecting portion F12 connected to at least one end of the first winding portion F11; in the same first winding group F1, the extending direction of the first winding portion F11 is parallel to the extending direction of the first access wiring portion 6100, and the same first winding... In group F1, the arrangement direction of different first winding portions F11 is perpendicular to the extension direction of the first access wiring portion 6100; the extension direction of the first connecting portion F12 is perpendicular to the extension direction of the first access wiring portion 6100; the first access wiring portion 6100 and the first winding portion F11 are connected through the first connecting portion F12, and / or adjacent first winding portions F11 are connected through the first connecting portion F12; the number of first winding portions F11 of the first touch lead 610 is inversely related to the distance between the first touch electrode 61 electrically connected to the first touch lead 610 and the bonding terminal 14.

[0137] In one possible implementation, referring to Figures 4A and 4J, where Figure 4J can be an enlarged schematic diagram of Figure 4A at the second winding group F2, at least a portion of the second touch lead 62 includes: a second winding group F2 connected to the second access wiring portion 6200; the second winding group F2 includes: at least one second winding portion F21, and a second connecting portion F22 connected to at least one end of the second winding portion F21; in the same second winding group F2, the extending direction of the second winding portion F21 is parallel to the extending direction of the second access wiring portion 6200, and the same second winding group... In F2, the arrangement direction of different second winding portions F21 is perpendicular to the extension direction of the second access wiring portion 6200; the extension direction of the second connecting portion F22 is perpendicular to the extension direction of the second access wiring portion 6200; the second access wiring portion 6200 and the second winding portion F21 are connected through the second connecting portion F22, and / or adjacent second winding portions F21 are connected through the second connecting portion F22; the number of second winding portions F21 of the second touch lead 620 is inversely related to the distance between the second touch electrode 62 electrically connected to the second touch lead 620 and the bonding terminal IC. For example, as shown in Figure 4A, from right to left, the first second touch electrode 62 is closer to the bonding terminal IC than the second second touch electrode 62. Therefore, the number of second winding portions F21 corresponding to the first second touch electrode 62 is greater. This increases the impedance of the second touch lead 620 corresponding to the second touch electrode 62 that is closer to the bonding terminal IC, thus balancing the impedance differences between different second touch leads 620.

[0138] In related technologies, the compression of the bezel of the touch display panel results in limited wiring space on the bottom bezel, causing touch leads to fall on the edge area of ​​part of the insulating layer of the display panel. Due to the overlapping discontinuity of the insulating layer at the edge area (for example, the organic insulating layer is partially removed at the edge area, and the removal depth is relatively deep), photoresist accumulates at this point when the touch leads are etched, causing the touch leads to open circuits or adjacent touch leads to connect, resulting in touch abnormality problems.

[0139] In view of this, referring to Figures 7A-7C, where Figure 7A can be an enlarged schematic diagram of Figure 3 at the dashed frame S4, Figure 7B can be a cross-sectional schematic diagram of Figure 7A at the dashed line f1, and Figure 7C can be a cross-sectional schematic diagram of Figure 7A at the dashed line f1, the display structure includes: a first insulating layer; the first insulating layer includes: a plurality of recesses G1, and at least one organic insulating portion G2; at least a portion of the recesses G1 and the organic insulating portion G2 are located in the peripheral area BB, and the recesses G1 and the organic insulating portion G2 are located on the same side of the display area AA as the bonding terminal 14; the plurality of recesses G1 are arranged along the first direction X, and at least a portion of the organic insulating portion G2 is located between two adjacent recesses G1; and the thickness of the recesses G1 in the direction perpendicular to the substrate 1 (which can be zero) is less than the thickness i1 of the insulating layer portion G2 in the direction perpendicular to the substrate 1;

[0140] The touch structure 6 also includes: multiple first traces 63 and multiple second traces 64; the first traces 63, the second traces 64 and the bonding terminal 14 are located on the same side of the display area AA, and the first traces 63 and the second traces 64 extend along the first direction X and are alternately arranged along the second direction Y; the orthographic projections of the first traces 63 and the second traces 64 on the substrate 1 overlap with the orthographic projections of the recessed portion G1 and the organic insulating portion G2 on the substrate 1; the first traces 63 and the second traces 64 are located in different layers.

[0141] In this embodiment of the present disclosure, for the touch leads located in the lower frame area of ​​the touch display panel and in the recessed portion G1 and the organic insulating portion G2, adjacent touch leads are set as traces of different layers and arranged alternately to reduce the probability of touch abnormalities caused by the overlapping of film layers below the area, which may easily lead to open circuits in the touch leads or short circuits between adjacent touch leads.

[0142] In one possible implementation, the minimum spacing h1 between adjacent first traces 63 and second traces 64 ranges from 6 μm to 15 μm. This ensures a larger spacing between adjacent first traces 63 and second traces 64 in the second direction Y, reducing the likelihood of touch malfunctions caused by overlapping film layers below the area, which could easily lead to open circuits in the touch leads or short circuits between adjacent touch leads.

[0143] Optionally, the spacing h1 between adjacent first traces 63 and second traces 64 in the second direction Y can be in the range of 6μm to 8μm; optionally, the spacing h1 between adjacent first traces 63 and second traces 64 in the second direction Y can be 6μm, 6.5μm, 6.7μm, 6.8μm, 6.9μm, 7μm, or 8μm.

[0144] In one possible implementation, at least one of the first touch lead 610 and the second touch lead 620 includes at least one of the following:

[0145] First route 63;

[0146] Second route 64.

[0147] In one possible implementation, the first touch lead 610 may include a first trace 63 and a second trace 64; in another possible implementation, the second touch lead 620 may include a first trace 63 and a second trace 64; in yet another possible implementation, the first touch lead 610 may include a first trace 63 and a second trace 64, and the second touch lead 620 may include a first trace 63 and a second trace 64, that is, a portion of the first trace 63 and a portion of the second trace 64 belong to the first touch lead 610, and a portion of the first trace 63 and a portion of the second trace 64 belong to the second touch lead 620.

[0148] In one possible implementation, as shown in FIG7A, the display structure includes: a plurality of signal lines located between the first insulating layer and the substrate 1; the signal lines include: a first signal trace segment 65 extending along the second direction Y; the orthographic projection of the organic insulating portion G2 on the substrate 1 covers the orthographic projection of the first signal trace segment 65 on the substrate.

[0149] In one possible implementation, the first signal line includes a first power line and / or a second power line, wherein the voltage applied to the first power line is less than the voltage applied to the second power line. Optionally, the first power line can be a low-level power line VSS, and the second power line can be a high-level power line VDD.

[0150] In one possible implementation, the first insulating layer includes: a planarization layer, and / or a pixel definition layer, and / or an encapsulation layer. For example, as shown in FIG7C, the first insulating layer may include a first planarization layer 401, a second planarization layer 405, a third planarization layer 406, and a pixel definition layer 408.

[0151] Based on the same inventive concept, this disclosure also provides a touch display device, which includes a touch display panel as provided in the embodiments of this disclosure. Implementation of this touch display device can refer to the embodiments of the touch display panel described above; repeated details will not be repeated.

[0152] In some embodiments, the display device provided in this disclosure can be any product or component with display function, such as a projector, 3D printer, virtual reality device, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, navigator, smartwatch, fitness wristband, or personal digital assistant. Optionally, the display device provided in this disclosure includes, but is not limited to, components such as a radio frequency unit, network module, audio output & input unit, sensor, display unit, user input unit, interface unit, and control chip. Optionally, the control chip is a central processing unit, digital signal processor, system-on-a-chip (SoC), etc. For example, the control chip may also include a memory, a power module, etc., and achieve power supply and signal input / output functions through additionally provided wires, signal lines, etc. For example, the control chip may also include hardware circuits and computer-executable code. The hardware circuit may include conventional very-large-scale integrated circuits (VLSI) or gate arrays, as well as existing semiconductors or other discrete components such as logic chips and transistors; the hardware circuit may also include field-programmable gate arrays, programmable array logic, programmable logic devices, etc. Furthermore, those skilled in the art will understand that the above structure does not constitute a limitation on the display device provided in the embodiments of this disclosure. In other words, the display device provided in the embodiments of this disclosure may include more or fewer of the above components, or combine certain components, or have different component arrangements.

[0153] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0154] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations to the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A touch display panel having a display area and a peripheral area located around the display area; wherein, include: Substrate; Multiple bonding terminals are located in the surrounding area; Display structure; A touch structure is located on the side of the display structure opposite to the substrate; The touch structure includes: at least one first touch electrode, at least one second touch electrode, at least one first touch lead, and at least one second touch lead; at least a portion of the first touch electrode and the second touch electrode are located in the display area; the first touch lead and the second touch lead are located in the peripheral area; the first touch electrode is electrically connected to the bonding terminal via the first touch lead, and the second touch electrode is electrically connected to the bonding terminal via the second touch lead; the first touch electrode and the second touch electrode extend in the same direction, and the minimum distance between the first touch electrode and the bonding terminal is greater than the minimum distance between the second touch electrode and the bonding terminal; Wherein, at least one of the first touch leads includes a double-layer trace, and at least a portion of at least one of the second touch leads includes a single-layer trace.

2. The touch display panel as described in claim 1, wherein, The touch structure includes: multiple second touch electrodes and multiple second touch leads; The plurality of second touch electrodes include: a plurality of first sub-touch electrodes and a plurality of second sub-touch electrodes; the plurality of second touch leads include: a plurality of first sub-touch leads and a plurality of second sub-touch leads; the first sub-touch electrodes are electrically connected to the bonding terminal through the first sub-touch leads, and the second sub-touch electrodes are electrically connected to the bonding terminal through the second sub-touch leads; the minimum distance between the first sub-touch electrodes and the bonding terminal is greater than the minimum distance between the second sub-touch electrodes and the bonding terminal; At least one of the first sub-touch leads includes a portion of double-layer routing and a portion of single-layer routing; at least one of the second sub-touch leads includes a single-layer routing.

3. The touch display panel as described in claim 2, wherein, The first sub-touch lead includes: a first trace segment and a second trace segment; the first trace segment and the second trace segment are arranged along the extension direction of the first sub-touch lead. The first trace segment includes: a first sub-trace and a second sub-trace stacked together; the first sub-trace and the second sub-trace are electrically connected through vias in the touch insulating layer; the second trace segment includes: a third sub-trace; The third sub-trace is on the same layer and made of the same material as either the first sub-trace or the second sub-trace.

4. The touch display panel as described in claim 3, wherein, The first sub-touch lead further includes: a third trace segment; in the extending direction of the first sub-touch lead, the third trace segment is located on the side of the second trace segment away from the first trace segment; the third trace segment includes: a fourth sub-trace; The third sub-trace is in the same layer and made of the same material as the second sub-trace; the fourth sub-trace is in the same layer and made of the same material as the first sub-trace.

5. The touch display panel as described in claim 3 or 4, wherein, The extension length of the first trace segment of the first sub-touch lead is positively correlated with the minimum distance between the first sub-touch electrode connected to the first sub-touch lead and the bonding terminal.

6. The touch display panel as described in claim 3, wherein, The third sub-trace is on the same layer and made of the same material as the first sub-trace.

7. The touch display panel as described in claim 3, wherein, The third sub-trace is on the same layer and made of the same material as the second sub-trace.

8. The touch display panel as described in any one of claims 3-7, wherein, The second sub-touch lead includes a fifth sub-trace; the fifth sub-trace is in the same layer and material as one of the first sub-trace and the second sub-trace.

9. The touch display panel as described in any one of claims 3-8, wherein, The first touch lead includes: a sixth sub-trace and a seventh sub-trace stacked together; the sixth sub-trace and the seventh sub-trace are electrically connected through vias in the touch insulating layer; The sixth sub-trace is in the same layer and made of the same material as the first sub-trace; the seventh sub-trace is in the same layer and made of the same material as the second sub-trace.

10. The touch display panel according to any one of claims 3-9, wherein, The resistivity of the first sub-trace is greater than the resistivity of the second sub-trace.

11. The touch display panel as claimed in claim 10, wherein, The thickness of the first sub-trace in the direction perpendicular to the substrate is less than the thickness of the second sub-trace in the direction perpendicular to the substrate.

12. The touch display panel as described in any one of claims 1-11, wherein, The maximum linewidth of the first touch lead perpendicular to the extension direction is greater than the maximum linewidth of the second touch lead perpendicular to and extending direction.

13. The touch display panel as described in any one of claims 1-12, wherein, The touch structure further includes: a first access wiring section and a second access wiring section; The first access trace is located at the junction of the first touch lead and the first touch electrode. The first touch lead is electrically connected to the first touch electrode through the first access trace, and the extension direction of the first access trace is different from the extension direction of the first touch electrode. The second access trace is located at the junction of the second touch lead and the second touch electrode. The second touch lead is electrically connected to the second touch electrode through the second access trace, and the extension direction of the second access trace is different from the extension direction of the second touch electrode. Both the first access routing section and the second access routing section include double-layer routing.

14. The touch display panel as claimed in claim 13, wherein, At least a portion of the first touch lead includes: a first winding group connected to the first access wiring portion; the first winding group includes: at least one first winding portion, and a first connecting portion connected to at least one end of the first winding portion; in the same first winding group, the extension direction of the first winding portion is parallel to the extension direction of the first access wiring portion, and in the same first winding group, the arrangement direction of different first winding portions is perpendicular to the extension direction of the first access wiring portion; the extension direction of the first connecting portion is perpendicular to the extension direction of the first access wiring portion; the first access wiring portion and the first winding portion are connected through the first connecting portion, and / or adjacent first winding portions are connected through the first connecting portion; The number of the first winding portions of the first touch lead is inversely related to the distance between the first touch electrode electrically connected to the first touch lead and the bonding terminal.

15. The touch display panel as claimed in claim 14, wherein, At least a portion of the second touch lead includes: a second winding group connected to the second access wiring portion; the second winding group includes: at least one second winding portion, and a second connecting portion connected to at least one end of the second winding portion; in the same second winding group, the extension direction of the second winding portion is parallel to the extension direction of the second access wiring portion, and in the same second winding group, the arrangement direction of different second winding portions is perpendicular to the extension direction of the second access wiring portion; the extension direction of the second connecting portion is perpendicular to the extension direction of the second access wiring portion; the second access wiring portion and the second winding portion are connected through the second connecting portion, and / or adjacent second winding portions are connected through the second connecting portion; The number of the second winding portions of the second touch lead is inversely related to the distance between the second touch electrode electrically connected to the second touch lead and the bonding terminal.

16. The touch display panel as described in any one of claims 1-15, wherein, The display structure includes: a first insulating layer; the first insulating layer includes: a plurality of recesses and at least one organic insulating portion; the recesses and the organic insulating portion are both located in the peripheral area, and the recesses, the organic insulating portion and the bonding terminal are located on the same side of the display area; the plurality of recesses are arranged along a first direction, and at least a portion of the organic insulating portion is located between two adjacent recesses; The touch structure further includes: multiple first traces and multiple second traces; the first traces, the second traces and the bonding terminal are located on the same side of the display area, and the first traces and the second traces extend along the first direction and are alternately arranged along the second direction; the orthographic projections of the first traces and the second traces on the substrate overlap with the orthographic projections of the recess and the organic insulating portion on the substrate; the first traces and the second traces are located in different layers.

17. The touch display panel as claimed in claim 16, wherein, At least one of the first touch lead and the second touch lead includes at least one of the following: First trace; The second routing.

18. The touch display panel as claimed in claim 14 or 15, wherein, The minimum spacing between adjacent first and second traces is 6μm to 15μm.

19. The touch display panel as described in any one of claims 16-18, wherein, The display structure includes: a plurality of signal lines located between the first insulating layer and the substrate; the signal lines include: a first signal trace segment extending along the second direction; at least a portion of the organic insulating portion's orthogonal projection on the substrate covers the orthogonal projection of the first signal trace segment on the substrate.

20. The touch display panel as claimed in claim 19, wherein, The first signal line includes a first power line and / or a second power line, wherein the voltage applied to the first power line is less than the voltage applied to the second power line.

21. The touch display panel as claimed in any one of claims 16-20, wherein, The first insulating layer includes: a planarization layer, and / or a pixel definition layer, and / or an encapsulation layer.

22. The touch display panel as claimed in any one of claims 1-21, wherein, The touch structure includes: a driving electrode, a sensing electrode, a driving lead, and a sensing lead; the driving electrode is electrically connected to the bonding terminal through the driving lead; the sensing electrode is electrically connected to the bonding terminal through the sensing lead. At least one of the driving electrode and the sensing electrode includes the first touch electrode and the second touch electrode; at least one of the driving lead and the sensing lead includes the first touch lead and the second touch lead.

23. A touch display device, wherein, Including the touch display panel as described in any one of claims 1-22.

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