Touch display panel and display apparatus

Abstract

Disclosed are a touch display panel and a display device. The touch display panel provided by embodiments of the present disclosure comprises: a display substrate comprising a display area and a peripheral area surrounding the display area; and a plurality of touch electrodes located on one side of the display substrate. Each of the touch electrodes comprise: a first portion located in the display area. At least some of the touch electrodes each further comprise: a second portion electrically connected to the first portion and located in the peripheral area.

Description

Touch display panel and display device Technical Field

[0001] This disclosure relates to the field of display technology, and more particularly to touch display panels and display devices. Background Technology

[0002] With the diversification of online education and office spaces, and the widespread use of portable electronic products in business and education, people have higher demands for human-computer interaction solutions, especially for writing with display screens and styluses.

[0003] Summary of the Invention

[0004] This disclosure provides a touch display panel, which includes:

[0005] The display substrate includes a display area and a peripheral area surrounding the display area;

[0006] Multiple touch electrodes are located on one side of the display substrate; the touch electrodes include: a first portion located in the display area; at least some of the touch electrodes also include: a second portion electrically connected to the first portion and located in the peripheral area.

[0007] In some embodiments, the plurality of touch electrodes include: edge touch electrodes and middle touch electrodes; at least a portion of the edge touch electrodes and at least a portion of the middle touch electrodes have the same extending direction;

[0008] The edge touch electrode includes a first part and a second part, wherein the second part of the edge touch electrode is located on one side of the first part of the edge touch electrode at least in the direction perpendicular to the extension of the edge touch electrode;

[0009] Among the edge touch electrodes and the middle touch electrodes with the same extension direction, the middle touch electrode is located on the side of the edge touch electrode away from the outer edge of the peripheral area; the middle touch electrode includes a first part, and in the direction perpendicular to the extension of the middle touch electrode, neither side of the first part of the middle touch electrode includes a second part adjacent to it.

[0010] In some embodiments, the intermediate touch electrode further includes a second portion, which is located at least on one side of the first portion of the intermediate touch electrode in the extending direction of the intermediate touch electrode.

[0011] In some embodiments, the second portion of the edge touch electrode is also located at least on one side of the first portion of the edge touch electrode in the extending direction of the middle touch electrode.

[0012] In some embodiments, the edge touch electrode includes: two first edge touch electrodes extending along a first direction, and two second edge touch electrodes extending along a second direction; the first direction and the second direction intersect.

[0013] The intermediate touch electrode includes: a plurality of first intermediate touch electrodes extending along a first direction, and a plurality of second intermediate touch electrodes extending along a second direction;

[0014] Multiple first intermediate touch electrodes are located between two first edge touch electrodes, and multiple second intermediate touch electrodes are located between two second edge touch electrodes.

[0015] In some embodiments, the first part and the second part include multiple intersecting wiring sections;

[0016] The line width of the second part of the routing section is equal to the line width of the first part of the routing section.

[0017] In some embodiments, the plurality of touch electrodes include an edge touch electrode and a middle touch electrode; in the edge touch electrode, the width of a first portion in the extension direction perpendicular to the edge touch electrode is equal to the width of a second portion located on the side of the first portion away from the middle touch electrode in the extension direction perpendicular to the edge touch electrode.

[0018] In some embodiments, the touch electrode includes a plurality of intersecting traces; the plurality of traces include: a first trace extending along a first direction, and a second trace extending along a second direction;

[0019] In the touch electrode, at least a portion of the trace width in the second part is greater than the trace width in the first part.

[0020] In some embodiments, the plurality of touch electrodes include an edge touch electrode and a middle touch electrode; in the edge touch electrode, the width of a first portion in the direction perpendicular to the edge touch electrode is greater than the width of a second portion located on the side of the first portion away from the middle touch electrode in the direction perpendicular to the edge touch electrode.

[0021] In some embodiments, in the peripheral area on one side of the display area, the line width of at least a portion of the trace portion in different areas in the direction away from the display area increases sequentially.

[0022] In some embodiments, in the peripheral area located on one side of the display area in the first direction, at least a portion of the first trace has a line width closer to the display area that is smaller than its line width farther away from the display area;

[0023] And / or, in the peripheral area located on one side of the display area in the second direction, at least a portion of the second trace has a line width closer to the display area that is smaller than its line width farther away from the display area.

[0024] In some embodiments, the line width of at least a portion of the traces, whose extension direction is the same as the arrangement direction of the display area and the peripheral area, gradually increases in the direction away from the display area.

[0025] In some embodiments, the wiring portion extending in the same direction as the display area and the peripheral area includes a plurality of sub-segments connected in sequence, and the line width of the plurality of sub-segments increases sequentially in the direction away from the display area.

[0026] In some embodiments, in the peripheral area on one side of the display area, the line width of at least a portion of the trace portion in different areas in the direction away from the display area decreases sequentially.

[0027] In some embodiments, in the peripheral area located on one side of the display area in the first direction, at least a portion of the first trace has a line width closer to the display area that is greater than its line width farther away from the display area;

[0028] And / or, in the peripheral area located on one side of the display area in the second direction, at least a portion of the second trace has a line width closer to the display area that is greater than its line width farther away from the display area.

[0029] In some embodiments, the line width of at least a portion of the traces, whose extension direction is the same as the arrangement direction of the display area and the peripheral area, gradually decreases in the direction away from the display area.

[0030] In some embodiments, at least a portion of the trace portion extending in the same direction as the display area and the peripheral area includes a plurality of sub-segments connected in sequence, the line width of the plurality of sub-segments decreasing sequentially in the direction away from the display area.

[0031] In some embodiments, the traces extending perpendicular to the arrangement direction of the display area and the peripheral area have the same line width at different positions in their extension direction.

[0032] In some embodiments, in the peripheral area located on one side of the display area in the first direction, the line width of the second trace is the same at different positions in the second direction;

[0033] And / or, in the peripheral area located on one side of the display area in the second direction, the line width of the first trace is the same at different positions in the first direction.

[0034] In some embodiments, the second part of the multiple routing sections includes at least: multiple first-width routing sections;

[0035] The line width of the first line width routing section is greater than the line width of the first part routing section, and the line widths of multiple first line width routing sections are equal.

[0036] In some embodiments, the first linewidth routing portion includes at least one opening area.

[0037] In some embodiments, the extension direction of the opening area is the same as the extension direction of the first line width trace.

[0038] In some embodiments, in the second part, at least a portion of the wiring crosses to form a first mesh structure.

[0039] In some embodiments, the wiring portions of the first part intersect to form a second grid structure; the distribution density of the second grid structure is less than the density of the first grid structure.

[0040] This disclosure provides a display device, including a touch display panel provided in this disclosure. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 is a schematic diagram of the structure of a touch display panel provided in an embodiment of this disclosure;

[0043] Figure 2 is a schematic diagram of a cross-sectional structure along BB' in Figure 1 provided by an embodiment of this disclosure;

[0044] Figure 3 is a schematic diagram of another touch display panel provided in an embodiment of this disclosure;

[0045] Figure 4 is a schematic diagram of a cross-sectional structure along CC' in Figure 3 provided by an embodiment of this disclosure;

[0046] Figure 5 is an enlarged structural schematic diagram of region N1 in Figure 1 provided by an embodiment of this disclosure;

[0047] Figure 6 is a schematic diagram of the structure of the second touch electrode in Figure 5 provided in an embodiment of this disclosure;

[0048] Figure 7 is a schematic diagram of the structure of the first touch electrode in Figure 5 provided in an embodiment of this disclosure;

[0049] Figure 8 is an enlarged structural schematic diagram of the N2 region in Figure 1 provided by an embodiment of this disclosure;

[0050] Figure 9 is a structural schematic diagram of another touch display panel provided in an embodiment of this disclosure;

[0051] Figure 10 is an enlarged structural schematic diagram of the N3 region in Figure 9 provided by an embodiment of this disclosure;

[0052] Figure 11 is an enlarged structural schematic diagram of region N4 in Figure 9 provided by an embodiment of this disclosure;

[0053] Figure 12 is an enlarged structural schematic diagram of region N3 in Figure 9 provided by another embodiment of this disclosure;

[0054] Figure 13 is an enlarged structural schematic diagram of the N3 region in Figure 9 provided by another embodiment of the present disclosure;

[0055] Figure 14 is an enlarged structural schematic diagram of the N3 region in Figure 9 provided by an embodiment of this disclosure;

[0056] Figure 15 is an enlarged structural schematic diagram of region N4 in Figure 9 provided by an embodiment of this disclosure;

[0057] Figure 16 is an enlarged structural schematic diagram of the N3 region in Figure 9 provided by an embodiment of this disclosure;

[0058] Figure 17 is an enlarged structural schematic diagram of region N4 in Figure 9 provided by an embodiment of this disclosure;

[0059] Figure 18 is an enlarged structural schematic diagram of the N3 region in Figure 9 provided by an embodiment of this disclosure;

[0060] Figure 19 is an enlarged structural schematic diagram of region N4 in Figure 9 provided by an embodiment of this disclosure;

[0061] Figure 20 is an enlarged structural schematic diagram of the N3 region in Figure 9 provided by an embodiment of this disclosure;

[0062] Figure 21 is an enlarged structural schematic diagram of region N4 in Figure 9 provided by an embodiment of this disclosure;

[0063] Figure 22 is an enlarged structural schematic diagram of the N3 region in Figure 9 provided by an embodiment of this disclosure;

[0064] Figure 23 is a schematic diagram of the structure of another touch display panel provided in an embodiment of this disclosure;

[0065] Figure 24 is a schematic diagram of the structure of another touch display panel provided in an embodiment of this disclosure. Detailed Implementation

[0066] 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. Furthermore, the embodiments and features in the embodiments of this disclosure can be combined with each other without conflict. 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.

[0067] 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 an 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.

[0068] It should be noted that the dimensions and shapes of the figures in the accompanying drawings do not reflect actual proportions and are intended only to illustrate the content of this disclosure. Furthermore, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0069] In related technologies, capacitive active pens are typically used for writing and other operations on touch display products. However, the touch electrodes of touch display products are located in the display area, while there are no touch electrodes in the peripheral area outside the display area. When the capacitive active pen writes at the edge of the display area, the signal strength decreases, resulting in lower writing accuracy at the edge of the screen and affecting writing and drawing input.

[0070] This disclosure provides a touch display panel, as shown in FIG1, the touch display panel including:

[0071] The display substrate 1 includes a display area AA and a peripheral area NA surrounding the display area AA;

[0072] Multiple touch electrodes 2 are located on one side of the display substrate 1; the touch electrodes 2 include: a first portion 3 located in the display area AA; at least some of the touch electrodes 2 also include: a second portion 4 electrically connected to the first portion 3 and located in the peripheral area NA.

[0073] The touch display panel provided in this embodiment includes touch electrodes that, in addition to the portion located in the display area, also include portions located in the peripheral area. When a capacitive stylus is used to write on the touch display panel and moves to the edge of the display area, compared to related technologies where no touch electrodes are provided in the peripheral area, the signal variation of the capacitive stylus can be increased. This avoids signal drop when the capacitive stylus is writing at the edge of the display area, prevents large signal variation, improves writing accuracy of the capacitive stylus at the edge of the product screen, and enhances the user experience.

[0074] In some embodiments, as shown in FIG1, the plurality of touch electrodes 2 include: edge touch electrodes 201 and middle touch electrodes 202; at least a portion of the edge touch electrodes 201 and at least a portion of the middle touch electrodes 202 extend in the same direction;

[0075] The edge touch electrode 201 includes a first part 3 and a second part 4, wherein the second part 4 of the edge touch electrode 201 is located on one side of the first part 3 of the edge touch electrode 201 at least in the direction perpendicular to the extension of the edge touch electrode 201;

[0076] In the edge touch electrode 201 and the middle touch electrode 202 with the same extension direction, the middle touch electrode 202 is located on the side of the edge touch electrode 201 away from the outer edge of the peripheral area NA; the middle touch electrode 202 includes a first part 3, and in the extension direction perpendicular to the middle touch electrode 202, neither side of the first part 3 of the middle touch electrode 202 includes the second part 4 adjacent to it.

[0077] It should be noted that the outer edge of the peripheral area NA refers to the edge of the peripheral area NA that is furthest from the display area.

[0078] The touch display panel provided in this embodiment has edge touch electrodes extending to the peripheral area at least in a direction perpendicular to their extension. A second portion is continuously distributed in the area on one side of the first portion of the edge touch electrodes. When a capacitive stylus is used to write on the touch display panel and moves to the edge of the first portion of the edge touch electrodes, the presence of the second portion can prevent the signal from dropping when the capacitive stylus is writing at the edge of the display area, avoid large signal changes in the capacitive stylus, improve the writing accuracy of the capacitive stylus at the edge of the product screen, and enhance the user experience.

[0079] In some embodiments, as shown in FIG1, the edge touch electrode 201 includes: two first edge touch electrodes 2011 extending along a first direction X, and two second edge touch electrodes 2012 extending along a second direction Y; the first direction X intersects the second direction Y; in FIG1, the first direction X and the second direction Y are perpendicular.

[0080] The intermediate touch electrode 202 includes: a plurality of first intermediate touch electrodes 2021 extending along a first direction X, and a plurality of second intermediate touch electrodes 2022 extending along a second direction Y;

[0081] Multiple first intermediate touch electrodes 2021 are located between two first edge touch electrodes 2011, and multiple second intermediate touch electrodes 2022 are located between two second edge touch electrodes 2012.

[0082] In practical implementation, as shown in Figure 1, the first edge touch electrode 2011 and the first middle touch electrode 2021 extend in the same direction, and are named the first touch electrode 2-1. The second edge touch electrode 2012 and the second middle touch electrode 2022 extend in the same direction, and are named the second touch electrode 2-2. The first touch electrode 2-1 and the second touch electrode 2-2 are arranged intersectingly.

[0083] In some embodiments, one of the first touch electrode and the second touch electrode is a touch driving electrode, and the other is a touch sensing electrode. For example, the first touch electrode, namely the first edge touch electrode and the first middle touch electrode, is a touch driving electrode, and the second touch electrode, namely the second edge touch electrode and the second middle touch electrode, is a touch sensing electrode.

[0084] The touch display panel provided in this embodiment has multiple touch electrodes divided into two categories with intersecting arrangement directions. Each touch electrode located at the edge in each arrangement direction includes a portion extending to the peripheral area. This can prevent the signal from dropping when the capacitive active pen writes at the edge of each side of the display area, avoid large signal changes in the capacitive active pen, improve the writing accuracy of the capacitive active pen at the edge of the product screen, and enhance the user experience.

[0085] In some embodiments, as shown in FIG1, a plurality of first intermediate touch electrodes 2021 are included between the two first edge touch electrodes 2011;

[0086] A plurality of second intermediate touch electrodes 2022 are included between the two second edge touch electrodes 2012.

[0087] In some embodiments, as shown in FIG1, the distance between two adjacent first intermediate touch electrodes 2021 is equal to the distance between adjacent first intermediate touch electrodes 2021 and first edge touch electrodes 2011.

[0088] The distance between two adjacent second intermediate touch electrodes 2022 is equal to the distance between the adjacent second intermediate touch electrode 2022 and the second edge touch electrode 2012.

[0089] In some embodiments, as shown in FIG1, the length of the first edge touch electrode 2011 is approximately equal to the length of the first middle touch electrode 2021;

[0090] The length of the second edge touch electrode 2012 is approximately equal to the length of the second middle touch electrode 2022.

[0091] In some embodiments, as shown in FIG1, the peripheral area NA includes: a first peripheral area NA-1 and a second peripheral area NA-2 located on both sides of the display area AA in the first direction X, and a third peripheral area NA-3 and a fourth peripheral area NA-4 located on both sides of the display area AA in the second direction Y.

[0092] In some embodiments, the touch display panel further includes multiple touch traces and multiple bonding pins, with the touch electrodes electrically connected to the bonding pins via the touch traces; for example, a third peripheral area may include a bonding area, with the bonding pins located in the bonding area.

[0093] In some embodiments, as shown in FIG1, the two first edge touch electrodes 2011 of the touch display panel extend to the first peripheral area NA-1 and the second peripheral area NA-2, respectively, and the two second edge touch electrodes 2012 of the touch display panel extend to the third peripheral area NA-3 and the fourth peripheral area NA-4, respectively.

[0094] In some embodiments, as shown in FIG1, the intermediate touch electrode 202 further includes a second portion 4, which is located at least on one side of the first portion 3 of the intermediate touch electrode 202 in the extending direction of the intermediate touch electrode 202.

[0095] In some embodiments, as shown in FIG1, the intermediate touch electrode 202 includes two second portions 4 located on both sides of its first portion 3.

[0096] In some embodiments, as shown in FIG1, the second portion 4 of the edge touch electrode 201 is also located at least on one side of the first portion 3 of the edge touch electrode 201 in the extending direction of the middle touch electrode 202.

[0097] In some embodiments, as shown in FIG1, the edge touch electrode 201 also includes a second portion 4 on both sides of its first portion 3.

[0098] In some embodiments, as shown in FIG1, each touch electrode 2 includes a second portion 4 located in the peripheral region NA at both ends of its extension direction.

[0099] The touch display panel provided in this embodiment includes a second part located in the peripheral area at both ends of each touch electrode in its extension direction. The touch electrodes located at the edge in the direction of touch electrode arrangement also extend to the peripheral area in the arrangement direction, which further improves the distribution of touch electrodes in the peripheral area, further improves the signal amount when the capacitive active pen writes at the edge of each side of the display area, avoids large signal changes of the capacitive active pen, improves the writing accuracy of the capacitive active pen at the edge of the product screen, and enhances the user experience.

[0100] In some embodiments, as shown in FIG1, the second portion 4 of the edge touch electrode 201 in its extension direction and the second portion 4 located on one side of its first portion 3 in the arrangement direction of the touch electrode 2 are connected, so that the peripheral area on the corner area side of the edge of the first portion 3 of the edge touch electrode 201 is also provided with the second portion 4, which improves the signal quantity when the capacitive active pen writes at the corner edge of the display area, avoids large signal changes of the capacitive active pen, improves the writing accuracy of the capacitive active pen at the edge of the product screen, and enhances the user experience.

[0101] In some embodiments, as shown in Figures 2 to 4, the touch display panel includes at least two touch conductive layers 8, namely a first touch conductive layer 801 and a second touch conductive layer 802 located on the side of the first touch conductive layer 801 facing away from the display substrate 1.

[0102] It should be noted that Figure 2 is a cross-sectional view along BB' in Figure 1, and Figure 3 is a cross-sectional view along CC' in Figure 3.

[0103] In some embodiments, as shown in FIG2, the first touch electrode 2-1, i.e., the first intermediate touch electrode 2021, and the first edge touch electrode (not shown) are located in the same touch conductive layer 8, and the second touch electrode 2-2, i.e., the second intermediate touch electrode 2022, and the second edge touch electrode (not shown) are located in the same touch conductive layer 8, and the first touch electrode 2-1 and the second touch electrode 2-2 are located in different touch conductive layers 8;

[0104] One of the first touch electrode 2-1 and the second touch electrode 2-2 is located in the first touch conductive layer 801, and the other of the first touch electrode 2-1 and the second touch electrode 2-2 is located in the second touch conductive layer 802; Figure 2 illustrates this by taking the example of the first touch electrode 2-1 being located in the first touch conductive layer 801 and the second touch electrode 2-2 being located in the second touch conductive layer 802.

[0105] Alternatively, in some embodiments, as shown in Figures 3 and 4, one of the first touch electrode 2-1 and the second touch electrode 2-2 is located in one layer of touch conductive layer 8, while the other of the first touch electrode 2-1 and the second touch electrode 2-2 is located in two different touch conductive layers 8. Figures 3 and 4 illustrate this by taking the example of the second touch electrode 2-2 being located in two different touch conductive layers 8, that is, the second touch electrode 2-2 includes a portion located in the first touch conductive layer 801 and a portion located in the second touch conductive layer 802.

[0106] In some embodiments, as shown in FIG3 and FIG4, the touch electrode 2 includes a plurality of first sub-electrodes 9 and a plurality of second sub-electrodes 10, and two adjacent first sub-electrodes 9 are electrically connected through the second sub-electrodes 10.

[0107] The orthographic projection of the first sub-electrode 9 of the second touch electrode 2-2 onto the display substrate 1 does not overlap with the orthographic projection of the first sub-electrode 9 of the first touch electrode 2-1 onto the display substrate 1.

[0108] The projection of the second sub-electrode 10 of the first touch electrode 2-1 onto the display substrate 1 overlaps with the projection of the second sub-electrode 10 of the second touch electrode 2-2 onto the display substrate 1.

[0109] It should be noted that when the first touch electrode and the second touch electrode are located in different touch conductive layers, the touch electrode can also be divided into multiple first sub-electrodes and multiple second sub-electrodes. Similarly, it is necessary to satisfy the following: the orthographic projection of the first sub-electrode of the first touch electrode on the display substrate does not overlap with the orthographic projection of the first sub-electrode of the second touch electrode on the display substrate; the orthographic projection of the second sub-electrode of the first touch electrode on the display substrate overlaps with the orthographic projection of the second sub-electrode of the second touch electrode on the display substrate.

[0110] In some embodiments, as shown in Figures 3 and 4, the first sub-electrode 9 and the second sub-electrode 10 of one of the first touch electrode 2-1 and the second touch electrode 2-2 are located in the same touch conductive layer 8 and are integrally connected; the first sub-electrode 9 and the second sub-electrode 10 of the other of the first touch electrode 2-1 and the second touch electrode 2-2 are located in different touch conductive layers 8; thereby avoiding interference between the first touch electrode 2-1 and the second touch electrode 2-2.

[0111] The first sub-electrode 9 of the first touch electrode 2-1 and the first sub-electrode 9 of the second touch electrode 2-2 are located in the same touch conductive layer 8, while the second sub-electrode 10 of the first touch electrode 2-1 and the second sub-electrode 10 of the second touch electrode 2-2 are located in different conductive layers.

[0112] In some embodiments, Figures 3 and 4 illustrate the example of the first sub-electrode 9 of the first touch electrode 2-1 and the second touch electrode 2-2 being located in the second touch conductive layer 802 and the second sub-electrode 10 of the second touch electrode 2-2 being located in the first touch conductive layer 801, with the second sub-electrode 10 of the second touch electrode 2-2 serving as a bridging electrode.

[0113] In some embodiments, as shown in FIG4, the first sub-electrode 9 and the second sub-electrode 10 located in different touch conductive layers 8 are electrically connected through a via 11.

[0114] In some embodiments, as shown in Figures 2 and 4, the touch display panel further includes: a first buffer layer 12 located between the first touch conductive layer 8-1 and the display substrate 1, a touch insulating layer 13 located between the first touch conductive layer 8-1 and the second touch conductive layer 8-2, and a protective layer 14 located on the side of the second touch conductive layer 8-2 facing away from the display substrate 1.

[0115] In some embodiments, as shown in FIG4, the first sub-electrode 9 of the second touch electrode 2-2 is electrically connected to the second sub-electrode 10 through a through-hole 11 penetrating the touch insulating layer 13.

[0116] In some embodiments, as shown in FIG1, the shape of the outer contour line connecting the touch electrodes 2 is rectangular. That is, when the touch electrodes are divided into a first sub-electrode and a second sub-electrode, the width of the first sub-electrode is equal to the width of the second sub-electrode in the extending direction perpendicular to the touch electrodes. The outer contours of the first sub-electrode and the second sub-electrode are rectangles of equal width.

[0117] Alternatively, as shown in Figure 3, the maximum width of the first sub-electrode 9 is greater than the maximum width of the second sub-electrode 10; the shape of the outer contour line of the first sub-electrode 9 is approximately rhomboid.

[0118] The phrase "the shape of the outer contour line of the first sub-electrode is approximately rhomboid" means that the shape of the outer contour line of the first sub-electrode is at least a rhomboid or a part of a rhomboid; for example, the shape of the outer contour line of the first sub-electrode can be a rhomboid with straight line segments or a rhomboid with broken line segments.

[0119] In some embodiments, as shown in FIG3, in the extending direction of the touch electrode 2, at least a portion of the first sub-electrode 9 and at least a portion of the second sub-electrode 10 in each touch electrode 2 are alternately arranged as a unit 16, that is, the unit 16 included in the first touch electrode 2-1 is a first unit 1601 extending along the second direction Y, and the unit 16 included in the second touch electrode 2-2 is a second unit 1602 extending along the first direction X. The touch electrode 2 includes at least one unit 16. When the touch electrode 2 includes multiple units 16, the multiple units 16 of the touch electrode 2 are electrically connected to each other.

[0120] In some embodiments, as shown in FIG1, for edge touch electrodes 201 and middle touch electrodes 202 extending in the same direction, the maximum width h1 of the edge touch electrode 201 is smaller than the maximum width h2 of the middle touch electrode 202 in the direction perpendicular to the extension. That is, in the second direction Y, the maximum width of the first edge touch electrode 2011 is smaller than the maximum width of the first middle touch electrode 2021; in the first direction X, the maximum width of the second edge touch electrode 2012 is less than or equal to the maximum width of the second middle touch electrode 2022. It should be noted that FIG1 uses the example of the maximum width of the second edge touch electrode 2012 being smaller than the maximum width of the second middle touch electrode 2022 for illustration.

[0121] It should be noted that in Figure 1, the outer contour of the touch electrode is rectangular, and the maximum width of the touch electrode is the width of the rectangle. The width of the rectangular contour of the edge touch electrode is smaller than the width of the rectangular contour of the middle touch electrode. If the outer contour of the touch electrode is not rectangular, for example, when the touch electrode includes a unit consisting of a first sub-electrode and a second sub-electrode arranged sequentially, and the outer contour of the first sub-electrode is approximately rhomboid, the maximum width of the touch electrode is the maximum width of the rhomboid first sub-electrode. When the touch electrode includes multiple units, the maximum width of the touch electrode is the maximum width of the multiple units. It can be set such that the maximum width of each unit is equal in the direction perpendicular to the extension of the unit. The maximum width of the touch electrode is set by the number of units included in the touch electrode, and the number of units included in the edge touch electrode is smaller than the number of units included in the middle touch electrode.

[0122] In some embodiments, the maximum width of the edge touch electrode is greater than or equal to 0.3 mm and less than or equal to 2 mm.

[0123] In some embodiments, the maximum width of the central touch electrode is 4.36 mm.

[0124] In some embodiments, as shown in Figures 5 to 8, the first part 3 and the second part 4 include multiple intersecting wiring sections 5.

[0125] It should be noted that Figure 5 is an enlarged schematic diagram of an N1 region in Figure 1, Figure 6 is the orthographic projection pattern of the second edge touch electrode 2012 and the second middle touch electrode 2022 in Figure 5 onto the display substrate, Figure 7 is the orthographic projection pattern of the first edge touch electrode 2011 and the first middle touch electrode 2021 in Figure 5 onto the display substrate, and Figure 8 is an enlarged schematic diagram of an N2 region in Figure 1.

[0126] The touch display panel provided in this disclosure can be applied to display products. For example, the trace portion of the touch electrode is projected onto the display substrate between adjacent sub-pixels of the display product, thereby avoiding the touch electrode from affecting the aperture ratio of the display product.

[0127] In some embodiments, as shown in Figures 5 to 8, the plurality of traces 5 include: a first trace 501 extending along a first direction X, and a second trace 502 extending along a second direction Y.

[0128] In some embodiments, the linewidth of the trace portion of the first part is 4 micrometers.

[0129] In some embodiments, as shown in FIG1, in the edge touch electrode 201, the width h3 of the first portion 3 in the extension direction perpendicular to the edge touch electrode 201 is equal to the width h4 of the second portion 4 located on the side of the first portion 3 away from the middle touch electrode 202 in the extension direction perpendicular to the edge touch electrode 201.

[0130] In some embodiments, as shown in Figures 5 to 8, the line width of the trace portion 5 of the second part 4 is equal to the line width of the trace portion 5 of the first part 3.

[0131] It should be noted that in Figures 5 and 8, lines of different thicknesses are used to represent the first touch electrode 2-1 and the second touch electrode 2-2 to more clearly distinguish the first touch electrode 2-1 and the second touch electrode 2-2, respectively. However, in some embodiments, the line width of the trace portion 5 of the first touch electrode 2-1 is equal to the line width of the trace portion 5 of the second touch electrode 2-2.

[0132] Alternatively, when h3 = h4, in some embodiments, the linewidth of the second portion of the trace may be greater than the linewidth of the first portion of the trace. For example, the linewidth of the first portion of the trace is 4 micrometers, and the linewidth of the second portion of the trace is 15 micrometers.

[0133] In some embodiments, the material of the trace portion is a metallic material. For trace portions located in the same touch conductive layer, breaks can be provided to disconnect the trace portions from each other at the required locations. That is, the touch electrode is a metal mesh structure with breaks formed by multiple interwoven metal traces. For example, when the mesh of the first touch electrode and the mesh of the second touch electrode are located in the same layer, breaks are provided in the mesh pattern provided across the entire surface to isolate the mesh of the first touch electrode from the mesh of the second touch electrode, and to isolate the trace portions inside the touch electrode. In Figures 5 to 8, taking the trace portion 5 including the first trace portion 501 and the second trace portion 502 as an example, the shape enclosed by the first trace portion 501, the second trace portion 502, and the break area between the first trace portion 501 and the second trace portion 502 is rectangular. Of course, in specific implementations, the trace portion can also extend in other directions, and the shape enclosed by the trace portion and the break can be rhomboid, triangular, hexagonal, or a combination of multiple shapes. Figures 5-8 illustrate the distance using a straight line segment as an example for the wiring section 5. In specific implementations, the wiring section can also be a broken line, a curve, etc., and this embodiment is not limited thereto. The edges of the metal mesh structure formed by the interlacing of the wiring sections can also include incomplete mesh patterns.

[0134] The touch electrode provided in this embodiment includes multiple traces that interweave to form a metal mesh structure. This metal mesh structure provides advantages such as low resistance, small thickness, and fast response speed, improving the sensitivity and accuracy of touch recognition. Furthermore, by setting breaks in the mesh pattern across the entire surface to isolate the meshes of different touch electrodes, the screen-off effect of the metal lines can be improved.

[0135] In some embodiments, as shown in Figures 6 and 8, in the edge touch electrode 201, the width h3 of the first portion 3 in the extension direction perpendicular to the edge touch electrode 201 is equal to the width h4 of the second portion 4 located on the side of the first portion 3 away from the middle touch electrode 202 in the extension direction perpendicular to the edge touch electrode 201. That is, the axis of symmetry of the edge touch electrode 201 overlaps with the boundary of the display area.

[0136] Specifically, as shown in Figure 6, in the second edge touch electrode 2012, the width h3 of the first portion 3 in the first direction X is equal to the width h4 of the second portion 4 located on the side of the first portion 3 away from the second intermediate touch electrode 2022 in the first direction X. As shown in Figure 8, in the first edge touch electrode 2011, the width h3 of the first portion 3 in the second direction Y is equal to the width h4 of the second portion 4 located on the side of the first portion 3 away from the first intermediate touch electrode 2021 in the second direction Y.

[0137] The touch display panel provided in this embodiment has an edge touch electrode in which the width of the first portion located in the display area is equal to the width of the second portion located in the peripheral area, and the line width of the trace portion in the display area is equal to the line width of the trace portion in the peripheral area. When performing operations such as writing on the touch display panel using an active stylus, the stylus tip signal gradually increases as it moves from the display area to the display area boundary without significantly increasing the width of the touch electrode extending into the peripheral area. The stylus tip signal only begins to decrease after reaching its peak value and crossing the display area boundary. This avoids peak signal attenuation and reduced signal-to-noise ratio in the display area, improving the accuracy of stylus tip position recognition at the edge of the display area. It also reserves space for compensation algorithms for edge reporting algorithms.

[0138] Of course, in some embodiments, when the peripheral area is large enough, the width h3 of the first part in the edge touch electrode in the direction perpendicular to the edge touch electrode is greater than the width h4 of the second part located on the side of the first part away from the middle touch electrode in the direction perpendicular to the edge touch electrode. That is, the axis of symmetry of the edge touch electrode is located in the peripheral area, which can further increase the signal strength when the active pen reaches the edge of the display area, ensuring that the signal gradually increases during the process of the active pen writing to the edge of the display area, while improving the signal strength at the edge of the display area.

[0139] In some embodiments, for example, the maximum width h1 of the edge touch electrode is 1.68 mm, the maximum width h2 of the middle touch electrode is 4.36 mm, and h3 = h4 is 0.84 mm.

[0140] Alternatively, in some embodiments, as shown in FIG9, in the edge touch electrode 201, the width h3 of the first portion 3 in the direction perpendicular to the edge touch electrode 201 is greater than the width h4 of the second portion 4 located on the side of the first portion 3 away from the middle touch electrode 202 in the direction perpendicular to the edge touch electrode 201.

[0141] Specifically, as shown in Figure 9, in the first edge touch electrode 2011, the width h3 of the first part 3 in the second direction Y is greater than the width h4 of the second part 4 located on the side of the first part 3 away from the first intermediate touch electrode 2021 in the second direction Y; in the second edge touch electrode 2012, the width h3 of the first part 3 in the first direction X is greater than the width h4 of the second part 4 located on the side of the first part 3 away from the second intermediate touch electrode 2022 in the first direction X.

[0142] This is equivalent to reducing the width of the second part while keeping the width of the first part of the edge touch electrode unchanged.

[0143] In some embodiments, for example, the maximum width h1 of the edge touch electrode is 1.14 mm, the maximum width h2 of the middle touch electrode is 4.36 mm, h4 is 0.3 mm, and h3 is 0.84 mm.

[0144] In some embodiments, as shown in Figures 10 to 21, in the touch electrode 2, at least a portion of the trace portion 5 in the second part 4 has a line width greater than the line width of the trace portion 5 in the first part 3.

[0145] It should be noted that Figures 10, 12, 13, 14, 16, 18, and 20 are enlarged schematic diagrams of region N3 in Figure 9, and Figures 11, 15, 17, 19, 21, and 20 are enlarged schematic diagrams of region N4 in Figure 9. In Figures 10-21, to more clearly distinguish the first touch electrode 2-1 and the second touch electrode 2-2, lines of different thicknesses are used to represent them respectively. However, in some embodiments, the line width of the trace portion 5 of the first portion 3 of the first touch electrode 2-1 is equal to the line width of the trace portion 5 of the first portion 3 of the second touch electrode 2-2.

[0146] When h3 is greater than h4, in some embodiments, the linewidth of the first part of the trace is 4 micrometers and the linewidth of the second part of the trace is 40 micrometers.

[0147] The touch display panel provided in this embodiment increases the area occupied by at least a portion of the second portion's traces because the line width of at least a portion of the second portion's traces is greater than that of the first portion's traces. Even if the width of the second portion located in the peripheral area is reduced, the capacitance distribution in the display area and the peripheral area can still be balanced despite the increased trace width. This allows for the same signal strength as the scheme where h3=h4 and the trace width remains unchanged, avoiding peak attenuation and reduced signal-to-noise ratio of the pen tip signal in the display area, and improving the accuracy of pen tip position recognition at the edge of the display area. It also reserves space for compensation algorithms for edge reporting algorithms. Furthermore, it can reduce the width of the peripheral area, making it easier to achieve narrow bezels. In addition, when the touch display panel is applied to display products, since the second portion is located in the peripheral area, increasing the trace width of the second portion will not affect the sub-pixel openings of the display area.

[0148] In some embodiments, as shown in Figures 10 and 11, the multiple traces 5 of the second part 4 include at least: multiple first-width traces 5-1;

[0149] The line width of the first line width routing section 5-1 is greater than the line width of the routing section 5 of the first part 3, and the line widths of multiple first line width routing sections 5-1 are equal.

[0150] In some embodiments, as shown in Figures 10 and 11, at least some of the multiple trace portions 5 of the second portion 4 further include: a second line width trace portion 5-2; the line width of the second line width trace portion 5-2 is equal to the line width of the trace portion 5 of the first portion 3.

[0151] In some embodiments, as shown in FIG12, the first linewidth trace portion 5-1 of the second portion 4 is electrically connected to the trace portion 5 of the first portion via a second linewidth trace portion 5-2. This creates a gap between the first linewidth trace portion 5-1 of the second portion 4 and the boundary of the display area AA. When the touch display panel is applied to a display product, even if process deviations occur during the manufacturing of the touch electrodes, the wider first linewidth trace portion can be prevented from shifting to the display area and affecting the aperture ratio of the display product.

[0152] In some embodiments, the length of the second linewidth routing portion between the first linewidth routing portion of the second portion and the routing portion of the first portion is approximately 0.02 mm.

[0153] In some embodiments, as shown in Figures 11 and 12, the first linewidth trace portion 5-1 is projected onto the display substrate 1 as a continuous pattern.

[0154] Alternatively, in some embodiments, as shown in FIG13, the first linewidth routing portion 5-1 includes at least one opening region 7.

[0155] It should be noted that, under the same trace area or the same capacitive load, the larger the area of ​​the touch electrode outline, the more uniform the capacitance distribution. The touch display panel provided in this embodiment, by setting an opening area in the first linewidth trace, can locally reduce the area occupied by the trace, thereby reducing capacitance. This achieves both increasing the trace outline size and providing uniform capacitance distribution, while avoiding excessive capacitance differences between the display area and the surrounding area, balancing the capacitance distribution between the display area and the surrounding area. It still achieves the same signal strength as the scheme with h3=h4 and unchanged trace linewidth, avoiding peak attenuation and reduced signal-to-noise ratio of the pen tip signal in the display area, and improving the accuracy of pen tip position recognition at the edge of the display area.

[0156] In some embodiments, as shown in FIG13, the shape of the opening region 7 in the orthographic projection of the display substrate 1 is a strip.

[0157] In some embodiments, as shown in FIG13, the extending direction of the opening region 7 is the same as the extending direction of the first line width routing portion 5-1. That is, the opening region 7 of the first routing portion 501 extends along the first direction X, and the opening region 7 of the second routing portion 502 extends along the second direction Y.

[0158] Alternatively, in some embodiments, as shown in Figures 14 to 21, in the touch electrode 2, the line widths of multiple second part 4 traces 5 that are wider than the first part 3 trace 5 are not completely the same.

[0159] In some embodiments, as shown in Figures 14 to 17, in the peripheral area NA on one side of the display area AA, the line width of at least a portion of the trace portion 5 in different areas in the direction away from the display area AA increases sequentially.

[0160] In the touch display panel provided in this embodiment, the line width of the trace portion of the second part increases as it moves further away from the boundary of the display area. When using an active stylus for writing or other operations, the peak position of the stylus tip signal can be shifted more towards the peripheral area outside the display area boundary. This ensures that when the stylus tip slides from the inside of the display area towards the boundary, the peak value of the stylus tip signal received by the edge touch electrodes appears in the peripheral area outside the display area boundary. Furthermore, compared to cases where the trace width is not gradually changing, the width of the second part can be smaller to achieve the same touch signal variation effect, and the size of the corresponding peripheral area can also be smaller. This means that with a smaller second part width, uniformity of signal variation can be maintained, which is beneficial for reducing the size of the peripheral area and thus achieving a narrow bezel.

[0161] In some embodiments, as shown in Figures 14 and 16, in the peripheral area NA located on one side of the display area AA in the first direction X, at least a portion of the first trace portion 501 has a line width closer to the display area AA that is smaller than its line width farther away from the display area AA.

[0162] And / or, as shown in Figures 15 and 17, in the peripheral area NA located on one side of the display area AA in the second direction Y, at least a portion of the second trace portion 502 has a line width closer to the display area AA that is smaller than its line width farther away from the display area AA.

[0163] In some embodiments, as shown in Figures 14 and 15, the line width of at least a portion of the trace portion 5, whose extension direction is the same as the arrangement direction of the display area AA and the peripheral area NA, gradually increases in the direction away from the display area AA.

[0164] Specifically, as shown in Figure 14, in the peripheral area NA located on the side of the display area AA in the first direction X, the line width of at least a portion of the first trace portion 501 extending along the first direction X gradually increases in the direction away from the display area AA. As shown in Figure 15, in the peripheral area NA located on the side of the display area AA in the second direction Y, the line width of at least a portion of the second trace portion 502 extending along the second direction Y gradually increases in the direction away from the display area AA.

[0165] In some embodiments, as shown in Figures 14 and 15, the second part 4 of the touch electrode 2 includes multiple traces 5, including a third line width trace 5-3 whose extension direction is the same as the arrangement direction of the display area AA and the peripheral area NA; the line width of the third line width trace 5-3 is not exactly the same at different positions.

[0166] Specifically, as shown in Figure 14, in the peripheral area NA located on one side of the display area AA in the first direction X, the third linewidth routing portion 5-3 extends along the first direction X, and the linewidth of the third linewidth routing portion 5-3 gradually increases in the direction away from the display area AA. As shown in Figure 15, in the peripheral area NA located on one side of the display area AA in the second direction Y, the third linewidth routing portion 5-3 extends along the second direction Y, and the linewidth of the third linewidth routing portion 5-3 gradually increases in the direction away from the display area AA.

[0167] In some embodiments, as shown in Figures 14 and 15, the second part 4 of the touch electrode 2 includes multiple traces 5, which further include a second line width trace 5-2 whose extension direction is the same as that of the third line width trace 5-3; the line width of the second line width trace 5-2 is uniform, and the line width of the second line width trace 5-2 is equal to the line width of the trace 5 of the first part.

[0168] At least some of the third-width wiring sections 5-3 are electrically connected through the second-width wiring section 5-2.

[0169] In some embodiments, the third linewidth routing portion 5-3 and the first portion can also be electrically connected via the second linewidth routing portion.

[0170] Alternatively, in some embodiments, as shown in Figures 16 and 17, at least a portion of the wiring portion 5, whose extension direction is the same as the arrangement direction of the display area AA and the peripheral area NA, includes a plurality of sub-segments 6 connected in sequence, and the line width of the plurality of sub-segments 6 increases sequentially in the direction away from the display area AA.

[0171] In some embodiments, as shown in Figures 14 to 17, the trace portion 5, whose extension direction is perpendicular to the arrangement direction of the display area AA and the peripheral area NA, has the same line width at different positions along its extension direction. That is, the line width of the trace portion 5, whose extension direction is perpendicular to the arrangement direction of the display area AA and the peripheral area NA, is uniform.

[0172] In some embodiments, as shown in Figures 14 and 16, in the peripheral area NA located on one side of the display area AA in the first direction X, the second wiring portion 502 has the same line width at different positions in the second direction Y.

[0173] And / or, as shown in Figures 15 and 17, in the peripheral area NA located on the side of the display area AA in the second direction Y, the line width of the first wiring portion 501 is the same at different positions in the first direction X.

[0174] In some embodiments, as shown in Figures 14 to 17, the second part 4 of the touch electrode 2 includes multiple traces 5, which further include a first linewidth trace 5-1. The first linewidth trace 5-1 has a uniform linewidth, and its linewidth is greater than that of the traces 5 in the first part. At least a portion of the first linewidth trace 5-1 extends in a direction perpendicular to the arrangement direction of the display area AA and the peripheral area NA.

[0175] In some embodiments, as shown in Figures 16 and 17, the extension direction of a portion of the first line width routing portion 5-1 is the same as that of the third line width routing portion 5-3, and the first line width routing portion 5-1 is located on the side of the third line width routing portion 5-3 facing the display area AA, and the line width of the first line width routing portion 5-1 is less than the minimum line width of the third line width routing portion 5-3.

[0176] Specifically, as shown in Figures 14 and 16, in the peripheral area NA located on one side of the display area AA in the first direction X, at least a portion of the second trace portion 502 extending along the second direction Y is a first linewidth trace portion 5-1, and its linewidth is uniform. As shown in Figures 15 and 17, in the peripheral area NA located on one side of the display area AA in the second direction Y, at least a portion of the first trace portion 501 extending in the first direction X is a first linewidth trace portion 5-1, and its linewidth is uniform.

[0177] In some embodiments, as shown in Figures 14 to 17, in the same touch electrode 2, the line width of the first line width routing portion 5-1 away from the display area AA is greater than the line width of the first line width routing portion 5-1 close to the display area AA.

[0178] Specifically, as shown in Figures 14 and 16, N5, N6, N7, and N8, located in the peripheral area NA, are sequentially moved away from the display area AA. In the first intermediate touch electrode 2021, the line width of the first line width routing portion 5-1 at position N5 is smaller than the line width of the first line width routing portion 5-1 at position N7. In the second edge touch electrode 2012, the line width of the first line width routing portion 5-1 at position N6 is smaller than the line width of the first line width routing portion 5-1 at position N8. As shown in Figures 15 and 17, N9, N10, N11, and N12, located in the peripheral area NA, are sequentially moved away from the display area AA. In the second intermediate touch electrode 2022, the line width of the first line width routing portion 5-1 at position N9 is smaller than the line width of the first line width routing portion 5-1 at position N11. In the first edge touch electrode 2011, the line width of the first line width routing portion 5-1 at position N10 is smaller than the line width of the first line width routing portion 5-1 at position N12.

[0179] Alternatively, in some embodiments, as shown in Figures 18 to 21, in the peripheral area NA on one side of the display area AA, the line width of at least a portion of the trace portion 5 in different areas in the direction away from the display area AA decreases sequentially.

[0180] In the touch display panel provided in this embodiment, the further away from the boundary of the display area, the smaller the line width of the trace portion of the second part. When using an active stylus for writing or other operations, the peak position of the stylus tip signal can be more biased towards the peripheral area outside the boundary of the display area. This ensures that when the stylus tip slides from the inside of the display area towards the boundary, the peak value of the stylus tip signal received by the edge touch electrode appears in the peripheral area outside the boundary of the display area, maximizing the preservation of the comparison signal strength under a smaller capacitive load. Furthermore, compared to the case where the trace width is not gradual, the width of the second part can be smaller while achieving the same touch signal change effect, and the size of the corresponding peripheral area can also be smaller. That is, with a smaller second part width, the uniformity of signal change can be ensured, which is beneficial to reducing the size of the peripheral area and thus achieving a narrow bezel.

[0181] In some embodiments, as shown in FIG18 and FIG20, in the peripheral area NA located on the side of the display area AA in the first direction X, at least a portion of the first trace portion 501 has a line width closer to the display area AA that is greater than its line width farther away from the display area AA.

[0182] And / or, as shown in Figures 19 and 21, in the peripheral area NA located on one side of the display area AA in the second direction Y, at least a portion of the second trace portion 502 has a line width closer to the display area AA that is greater than its line width farther away from the display area AA.

[0183] In some embodiments, as shown in Figures 18 and 19, the line width of at least a portion of the trace portion 5, whose extension direction is the same as the arrangement direction of the display area AA and the peripheral area NA, gradually decreases in the direction away from the display area AA.

[0184] Specifically, as shown in FIG18, in the peripheral area NA located on the side of the display area AA in the first direction X, the line width of at least a portion of the first trace portion 501 extending along the first direction X gradually decreases in the direction away from the display area AA. As shown in FIG19, in the peripheral area NA located on the side of the display area AA in the second direction Y, the line width of at least a portion of the second trace portion 502 extending along the second direction Y gradually decreases in the direction away from the display area AA.

[0185] In some embodiments, as shown in Figures 18 and 19, the second part 4 of the touch electrode 2 includes multiple traces 5, including a third line width trace 5-3 whose extension direction is the same as the arrangement direction of the display area AA and the peripheral area NA; the line width of the third line width trace 5-3 is not exactly the same at different positions.

[0186] Specifically, as shown in Figure 18, in the peripheral area NA located on one side of the display area AA in the first direction X, the third linewidth routing portion 5-3 extends along the first direction X, and the linewidth of the third linewidth routing portion 5-3 gradually decreases in the direction away from the display area AA. As shown in Figure 19, in the peripheral area NA located on one side of the display area AA in the second direction Y, the third linewidth routing portion 5-3 extends along the second direction Y, and the linewidth of the third linewidth routing portion 5-3 gradually decreases in the direction away from the display area AA.

[0187] In some embodiments, as shown in Figures 18 and 19, the second part 4 of the touch electrode 2 includes multiple traces 5, which further include a second line width trace 5-2 extending in the same direction as the third line width trace 5-3; the line width of the second line width trace 5-2 is uniform, and the line width of the second line width trace 5-2 is equal to the line width of the trace 5 of the first part.

[0188] At least some of the third-width wiring sections 5-3 are electrically connected through the second-width wiring section 5-2.

[0189] In some embodiments, the third linewidth routing portion 5-3 and the first portion can also be electrically connected via the second linewidth routing portion.

[0190] Alternatively, as shown in Figures 20 and 21, in some embodiments, at least a portion of the wiring portion 5, whose extension direction is the same as the arrangement direction of the display area AA and the peripheral area NA, includes a plurality of sub-segments 6 connected in sequence, and the line width of the plurality of sub-segments 6 decreases sequentially in the direction away from the display area AA.

[0191] In some embodiments, as shown in Figures 18 to 21, the trace portion 5, whose extension direction is perpendicular to the arrangement direction of the display area AA and the peripheral area NA, has the same line width at different positions along its extension direction. That is, the line width of the trace portion 5, whose extension direction is perpendicular to the arrangement direction of the display area AA and the peripheral area NA, is uniform.

[0192] In some embodiments, as shown in Figures 18 and 20, in the peripheral area NA located on one side of the display area AA in the first direction X, the second wiring portion 502 has the same line width at different positions in the second direction Y.

[0193] And / or, as shown in Figures 19 and 21, in the peripheral area NA located on the side of the display area AA in the second direction Y, the line width of the first wiring portion 501 is the same at different positions in the first direction X.

[0194] In some embodiments, as shown in Figures 18-21, the second part 4 of the touch electrode 2 includes multiple traces 5, which further include a first linewidth trace 5-1. The first linewidth trace 5-1 has a uniform linewidth, and its linewidth is greater than that of the traces 5 in the first part. At least a portion of the first linewidth trace 5-1 extends in a direction perpendicular to the arrangement direction of the display area AA and the peripheral area NA.

[0195] In some embodiments, as shown in Figures 20 and 21, the extension direction of a portion of the first line width routing portion 5-1 is the same as that of the third line width routing portion 5-3, and the first line width routing portion 5-1 is located on the side of the third line width routing portion 5-3 facing the display area AA, and the line width of the first line width routing portion 5-1 is greater than the minimum line width of the third line width routing portion 5-3.

[0196] Specifically, as shown in Figures 18 and 20, in the peripheral area NA located on one side of the display area AA in the first direction X, at least a portion of the second trace portion 502 extending along the second direction Y is a first linewidth trace portion 5-1, and its linewidth is uniform. As shown in Figures 19 and 21, in the peripheral area NA located on one side of the display area AA in the second direction Y, at least a portion of the first trace portion 501 extending in the first direction X is a first linewidth trace portion 5-1, and its linewidth is uniform.

[0197] In some embodiments, as shown in Figures 18 to 21, in the same touch electrode 2, the line width of the first line width routing portion 5-1 away from the display area AA is smaller than the line width of the first line width routing portion 5-1 close to the display area AA.

[0198] Specifically, as shown in Figures 18 and 20, N5, N6, N7, and N8, located in the peripheral area NA, are sequentially moved away from the display area AA. In the first intermediate touch electrode 2021, the line width of the first line width routing portion 5-1 at position N5 is greater than the line width of the first line width routing portion 5-1 at position N7. In the second edge touch electrode 2012, the line width of the first line width routing portion 5-1 at position N6 is greater than the line width of the first line width routing portion 5-1 at position N8. As shown in Figures 19 and 21, N9, N10, N11, and N12, located in the peripheral area NA, are sequentially moved away from the display area AA. In the second intermediate touch electrode 2022, the line width of the first line width routing portion 5-1 at position N9 is greater than the line width of the first line width routing portion 5-1 at position N11. In the first edge touch electrode 2011, the line width of the first line width routing portion 5-1 at position N10 is greater than the line width of the first line width routing portion 5-1 at position N12.

[0199] In some embodiments, as shown in FIG22, in the second part 4, at least some of the wiring portions 5 intersect to form a first mesh structure 17. Specifically, in the second part 4, multiple first wiring portions 501 and multiple second wiring portions 502 intersect to form a closed first mesh structure 17, and the outer contour of the first mesh structure 17 is approximately rectangular. The first mesh structure 17 formed by multiple wiring portions 5 is equivalent to thickening a portion of the touch electrode and having cutouts in the thickened area, which can further improve the uniformity of capacitance distribution.

[0200] In some embodiments, in FIG22, the line width of the trace portion 5 of the first portion 3 is equal to the line width of the trace portion 5 of the second portion 4.

[0201] In some embodiments, as shown in FIG22, the wiring portions 5 of the first portion 3 intersect to form a second mesh structure 18; the distribution density of the second mesh structure 18 is less than the density of the first mesh structure 17.

[0202] The touch display panel provided in this embodiment is equivalent to increasing the distribution density of the wiring portion in the second part of the peripheral area, which can improve the uniformity of capacitance distribution in the display area and the peripheral area, and increase the signal change of the capacitive active pen at the edge of the display area.

[0203] In some embodiments, as shown in FIG22, the mesh opening area of ​​the second mesh structure 17 is smaller than the mesh opening area of ​​the second mesh structure 18.

[0204] In some embodiments, as shown in FIG23, the display substrate is an electroluminescent display substrate. The display substrate 1 includes: a substrate 101, a driving circuit layer 109 located on one side of the substrate 101, a pixel definition layer 107 located on the side of the driving circuit layer 109 opposite to the substrate 101, a plurality of light-emitting devices 108, and an encapsulation layer 102 located on the side of the light-emitting devices 108 opposite to the substrate 101; wherein, the light-emitting devices 108 correspond one-to-one with the sub-pixels.

[0205] It should be noted that Figure 23 is an example of the first touch electrode 2-1 and the second touch electrode 2-2 being located on different layers.

[0206] In some embodiments, as shown in FIG23, the light-emitting device 108 includes an anode 1081, a light-emitting functional layer 1082, and a cathode 1083 stacked together. The pixel definition layer 107 includes a plurality of sub-pixel opening regions 1071. The pixel definition layer 107 covers the edge of the anode 1081. The orthographic projection of the sub-pixel opening region 1071 onto the substrate 101 falls within the orthographic projection of the anode 1081 onto the substrate 101. The light-emitting functional layer 1082 is located on the side of the anode 1081 and the pixel definition layer 107 away from the substrate 101. The cathode 1083 is located on the side of the light-emitting functional layer 1082 away from the substrate 101.

[0207] In some embodiments, the touch display panel includes a plurality of sub-pixels in the display area; the plurality of sub-pixels include, for example, a plurality of red sub-pixels, a plurality of blue sub-pixels, and a plurality of green sub-pixels.

[0208] In specific implementation, if the light-emitting device is an organic light-emitting diode, the light-emitting functional layer shall at least include an organic light-emitting layer, and may also include 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.

[0209] In some embodiments, as shown in FIG23, the driving circuit layer 109 includes a pixel driving circuit that corresponds one-to-one with the light-emitting device 108 and drives the light-emitting device 108 to emit light; the pixel driving circuit includes, for example, a thin-film transistor (TFT) and a capacitor (not shown). It should be noted that only one TFT is shown in FIG23. In specific implementations, the pixel driving circuit may also include a greater number of thin-film transistors and capacitors.

[0210] It should be noted that Figure 23 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 1091 facing away from the substrate 101. The display substrate 1 also includes: a second buffer layer 103 located between the substrate 101 and the active layer 1091; a gate insulating layer 104 located between the gate G and the active layer 1091; an interlayer insulating layer 105 between the gate G and the source S and drain D; and a planarization layer 106 located between the source S and drain D and the anode 1081.

[0211] In some embodiments, the anode is connected to the drain via a via that penetrates the planarization layer.

[0212] In some embodiments, as shown in FIG23, the multilayer touch conductive layer 8 includes a first touch conductive layer 8-1 and a second touch conductive layer 8-2; the second touch conductive layer 8-2 is located on the side of the first touch conductive layer 8-1 away from the display substrate 1; the first buffer layer 12 is disposed on the encapsulation layer 102, that is, the first buffer layer 12 is located between the first touch conductive layer 8-1 and the encapsulation layer 102.

[0213] The touch display panel provided in this embodiment adopts the FMLOC process, that is, the touch electrodes are directly fabricated on the stacked light-emitting structure layer and encapsulation layer, which can reduce the thickness of the touch display panel and help to achieve the thinning of touch display products.

[0214] In some embodiments, the orthographic projection of the trace portion of the touch electrode onto the substrate is located between adjacent sub-pixels. That is, as shown in FIG24, the orthographic projection of the trace portion 2 onto the substrate 101 does not overlap with the sub-pixel opening region 1071, and the orthographic projection of the trace portion 2 onto the substrate 101 is located between adjacent sub-pixel opening regions 1071.

[0215] The touch display panel provided in this embodiment has touch electrodes formed by interlacing multiple traces, and the orthographic projection of the traces on the substrate is located between the opening areas of adjacent sub-pixels, which can avoid the touch electrodes affecting the opening ratio of the touch display panel.

[0216] It should be noted that in Figure 24, some sub-pixel opening areas 1071 do not have routing sections 5. In specific implementations, routing sections 5 can also be provided between any adjacent sub-pixel opening areas 1071.

[0217] Based on the same inventive concept, this disclosure also provides a display device, including the touch display panel provided in this disclosure.

[0218] The display device provided in this disclosure includes any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. Other essential components of this display device are understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting this disclosure. Implementation of this display device can refer to the above-described embodiments of the touch display panel; repeated details will not be elaborated upon.

[0219] In summary, the touch display panel and display device provided in this disclosure include touch electrodes that, in addition to the portion located in the display area, also include at least a portion located in the peripheral area. When a capacitive active pen is used to write on the touch display panel and moves to the edge of the display area, compared to the case where no touch electrodes are provided in the peripheral area of ​​related technologies, the signal change of the capacitive active pen can be increased, the signal decrease of the capacitive active pen can be avoided when writing at the edge of the display area, the writing accuracy of the capacitive active pen at the edge of the product screen can be improved, and the user experience can be enhanced.

[0220] 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.

[0221] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include such modifications and variations.

Claims

1. A touch display panel, wherein, The touch display panel includes: A display substrate includes a display area and a peripheral area surrounding the display area; Multiple touch electrodes are located on one side of the display substrate; each touch electrode includes a first portion located in the display area; at least a portion of the touch electrodes also includes a second portion electrically connected to the first portion and located in the peripheral area.

2. The touch display panel according to claim 1, wherein, The plurality of touch electrodes include: edge touch electrodes and middle touch electrodes; at least a portion of the edge touch electrodes and at least a portion of the middle touch electrodes have the same extending direction; The edge touch electrode includes a first portion and a second portion, wherein the second portion of the edge touch electrode is located on one side of the first portion of the edge touch electrode at least in a direction perpendicular to the extension of the edge touch electrode; In the edge touch electrode and the middle touch electrode that extend in the same direction, the middle touch electrode is located on the side of the edge touch electrode away from the outer edge of the peripheral area; the middle touch electrode includes the first part, and in the direction perpendicular to the extension of the middle touch electrode, neither side of the first part of the middle touch electrode includes the second part adjacent to it.

3. The touch display panel according to claim 2, wherein, The intermediate touch electrode further includes a second portion, wherein the second portion of the intermediate touch electrode is located at least on one side of the first portion of the intermediate touch electrode in the extending direction of the intermediate touch electrode.

4. The touch display panel according to claim 2 or 3, wherein, The second portion of the edge touch electrode is also located at least on one side of the first portion of the edge touch electrode in the extending direction of the middle touch electrode.

5. The touch display panel according to any one of claims 2 to 4, wherein, The edge touch electrodes include: two first edge touch electrodes extending along a first direction, and two second edge touch electrodes extending along a second direction; the first direction and the second direction intersect. The intermediate touch electrode includes: a plurality of first intermediate touch electrodes extending along a first direction, to... and a plurality of second intermediate touch electrodes extending along the second direction; The plurality of first intermediate touch electrodes are located between the two first edge touch electrodes, and the plurality of second intermediate touch electrodes are located between the two second edge touch electrodes.

6. The touch display panel according to any one of claims 1 to 5, wherein, The first part and the second part include multiple intersecting wiring sections; The line width of the second part of the trace is equal to the line width of the first part of the trace.

7. The touch display panel according to claim 6, wherein, The plurality of touch electrodes include edge touch electrodes and middle touch electrodes; in the edge touch electrode, the width of the first portion in the extension direction perpendicular to the edge touch electrode is equal to the width of the second portion located on the side of the first portion away from the middle touch electrode in the extension direction perpendicular to the edge touch electrode.

8. The touch display panel according to any one of claims 1 to 5, wherein, The touch electrode includes multiple intersecting traces; the multiple traces include: a first trace extending along a first direction, and a second trace extending along a second direction; In the touch electrode, at least a portion of the trace width in the second part is greater than the trace width in the first part.

9. The touch display panel according to claim 6 or 8, wherein, The plurality of touch electrodes include edge touch electrodes and middle touch electrodes; in the edge touch electrodes, the width of the first portion in the direction perpendicular to the edge touch electrode is greater than the width of the second portion located on the side of the first portion away from the middle touch electrode in the direction perpendicular to the edge touch electrode.

10. The touch display panel according to claim 8 or 9, wherein, In the peripheral area on one side of the display area, the line width of at least a portion of the trace portion in different areas in the direction away from the display area increases sequentially.

11. The touch display panel according to claim 10, wherein, In the peripheral area located on one side of the display area in the first direction, at least a portion of the first trace has a line width closer to the display area that is smaller than its line width farther away from the display area; And / or, in the peripheral area located on one side of the display area in the second direction, at least part of The line width of the second trace portion closer to the display area is smaller than the line width farther away from the display area.

12. The touch display panel according to claim 10 or 11, wherein, At least a portion of the traces whose extension direction is the same as the arrangement direction of the display area and the peripheral area gradually increase in width in the direction away from the display area.

13. The touch display panel according to claim 10 or 11, wherein, At least a portion of the wiring portion, whose extension direction is the same as the arrangement direction of the display area and the peripheral area, includes a plurality of sub-segments connected in sequence, the line width of the plurality of sub-segments increasing sequentially in the direction away from the display area.

14. The touch display panel according to claim 8 or 9, wherein, In the peripheral area on one side of the display area, the line width of at least a portion of the trace portion in different areas in the direction away from the display area decreases sequentially.

15. The touch display panel according to claim 14, wherein, In the peripheral area located on one side of the display area in the first direction, at least a portion of the first trace has a line width closer to the display area that is greater than its line width farther away from the display area; And / or, in the peripheral area located on one side of the display area in the second direction, at least a portion of the second trace portion has a line width closer to the display area that is greater than its line width farther away from the display area.

16. The touch display panel according to claim 14 or 15, wherein, At least a portion of the traces whose extension direction is the same as the arrangement direction of the display area and the peripheral area gradually decrease in width in the direction away from the display area.

17. The touch display panel according to claim 14 or 15, wherein, At least a portion of the wiring portion, whose extension direction is the same as the arrangement direction of the display area and the peripheral area, includes a plurality of sub-segments connected in sequence, the line width of the plurality of sub-segments decreasing sequentially in the direction away from the display area.

18. The touch display panel according to any one of claims 10 to 17, wherein, The traces whose extension direction is perpendicular to the arrangement direction of the display area and the peripheral area have the same line width at different positions in their extension direction.

19. The touch display panel according to claim 18, wherein, In the peripheral area located on one side of the display area in the first direction, the line width of the second trace is the same at different positions in the second direction; And / or, in the peripheral area located on one side of the display area in the second direction, the line width of the first trace is the same at different positions in the first direction.

20. The touch display panel according to any one of claims 6 to 9, wherein, The second part includes at least: multiple first-width traces; The line width of the first line width routing section is greater than the line width of the first part routing section, and the line widths of multiple first line width routing sections are equal.

21. The touch display panel according to claim 20, wherein, The first linewidth routing section includes at least one opening area.

22. The touch display panel according to claim 21, wherein, The extension direction of the opening area is the same as the extension direction of the first line width routing portion.

23. The touch display panel according to claim 6, wherein, In the second part, at least some of the wiring sections intersect to form a first grid structure.

24. The touch display panel according to claim 23, wherein, The wiring sections of the first part intersect to form a second grid structure; the distribution density of the second grid structure is less than that of the first grid structure.

25. A display device, wherein, Includes the touch display panel according to any one of claims 1 to 24.

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