Touch display panel and touch display device

Abstract

Embodiments of the present disclosure provide a touch display panel and a touch display device. The touch display panel comprises: a substrate; a shielding structure, located in a first area on one side of the substrate, and surrounding the periphery of a via hole, wherein the orthographic projection of the shielding structure on the substrate extends from a display area to the via hole, and at least covers part of the first area; and a touch structure layer, located on the same side of the substrate as the shielding structure, the touch structure layer comprising a first touch pattern and a second touch pattern, wherein the first touch pattern is located in the display area, the second touch pattern is located in the first area, and the first touch pattern and the second touch pattern are each of a mesh structure comprising a plurality of first openings.

Description

Touch display panel and touch display device Technical Field

[0001] The present disclosure relates to the field of semiconductor technology, and in particular to a touch display panel and a touch display device. Background Art

[0002] In a touch panel, touch location detection is achieved by crisscrossing transmit (Tx) and receive (Rx) electrodes in orthogonal directions across the panel. In the electrode layout scheme proposed by Flexible Multiple Layer on Cell (FMLOC) technology, drive and sense electrodes are laid out on the same layer. These electrodes form a touch cell pattern, and the touch location is determined by changes in electrical parameters.

[0003] Summary of the Invention

[0004] The present disclosure provides a touch display panel and a touch display device. The touch display panel has a via hole extending through the touch display panel, a display area located outside the via hole, and a first area located between the via hole and the display area. The touch display panel includes:

[0005] substrate;

[0006] a shielding structure, located in the first region on one side of the substrate and surrounding the periphery of the via hole, the shielding structure having an orthographic projection on the substrate;

[0007] A touch structure layer is located on the same side of the substrate as the shielding structure, and the touch structure layer includes: a first touch pattern and a second touch pattern, wherein the first touch pattern is located in the display area and the second touch pattern is located in the first area; the first touch pattern and the second touch pattern are both mesh structures including multiple first openings.

[0008] In a possible implementation, the display panel further includes: a light filtering structure layer;

[0009] The light filtering structure layer includes: a first blocking portion, which is located in the first area; and the blocking structure includes the first blocking portion.

[0010] In a possible implementation manner, the light filtering structure layer is located on a side of the touch control structure layer facing away from the substrate.

[0011] In a possible implementation, the touch display panel further includes: a pixel definition layer;

[0012] The pixel definition layer includes: a second blocking portion, which is located in the first area; and the blocking structure includes the second blocking portion.

[0013] In a possible implementation, the touch display panel further includes: an active layer located between the substrate and the touch structure layer, and a first light shielding layer located between the active layer and the substrate;

[0014] The first light-shielding layer includes: a third light-shielding portion located in the first area; and the light-shielding structure includes the third light-shielding portion.

[0015] In a possible implementation manner, the active layer includes a plurality of active portions located in the display area;

[0016] The first light-shielding layer includes: a plurality of fourth light-shielding portions located in the display area; wherein the orthographic projections of the fourth light-shielding portions on the substrate cover the orthographic projections of the active portion on the substrate.

[0017] In a possible embodiment, the first light-shielding layer further includes: a plurality of connection structures located in the display area; a plurality of the fourth shielding portions are electrically connected via the plurality of connection structures, and the plurality of the fourth shielding portions and the plurality of connection structures form a mesh structure having a plurality of second openings.

[0018] In a possible implementation, the touch display panel further includes: a retaining wall structure and a first isolation structure between the substrate and the touch structure layer; the retaining wall structure is located in the first area and surrounds the via hole; the first isolation structure is located between the retaining wall structure and the via hole and surrounds the via hole;

[0019] The orthographic projection of the second touch pattern on the substrate is located on a side of the orthographic projection of the retaining wall structure on the substrate away from the via hole.

[0020] In a possible implementation, the touch display panel further includes, between the substrate and the touch structure layer: a retaining wall structure, a first isolation structure, and a first filling layer covering at least the first isolation structure; the retaining wall structure is located in the first area and surrounds the via hole; the first isolation structure is located between the retaining wall structure and the via hole and surrounds the via hole;

[0021] The orthographic projection of the second touch pattern on the substrate covers the orthographic projection of the retaining wall structure and at least a portion of the first isolation structure on the substrate.

[0022] In a possible implementation, the touch structure layer further includes: an anti-static structure;

[0023] The orthographic projection of the second touch pattern on the substrate is located on a side of the orthographic projection of the anti-static structure on the substrate away from the via hole.

[0024] In a possible implementation manner, the anti-static structure is located on a side of the orthographic projection of the substrate of the retaining wall structure close to the via hole.

[0025] In a possible implementation, the anti-static structure includes: a plurality of arc segments that are spaced apart from each other and surround the via hole.

[0026] In one possible embodiment, the touch structure layer includes: a plurality of first touch electrodes extending along a first direction, and a plurality of second touch electrodes extending along a second direction; the first touch electrodes include a plurality of first touch electrode blocks arranged sequentially and electrically connected along the first direction, and the second touch electrodes include a plurality of second touch electrode blocks arranged sequentially and electrically connected along the second direction;

[0027] One of the first touch electrode block and the second touch electrode block includes a third touch electrode block, and the via hole is located in the third touch electrode block;

[0028] The third touch electrode block includes the second touch pattern.

[0029] In a possible implementation manner, the third touch electrode block has a first hollow; the orthographic projection of the first hollow on the substrate covers the orthographic projection of the via on the substrate.

[0030] In one possible embodiment, the touch structure layer includes: a plurality of first touch electrodes extending along a first direction, and a plurality of second touch electrodes extending along a second direction; the first touch electrodes include a plurality of first touch electrode blocks sequentially arranged and electrically connected along the first direction, and the second touch electrodes include a plurality of second touch electrode blocks sequentially arranged and electrically connected along the second direction; at least one of the second touch electrodes is divided by the via into a discontinuous first sub-touch electrode and a discontinuous second sub-touch electrode;

[0031] The touch structure layer further includes: a connection structure; the connection structure is located in the first area, surrounds the via hole, and electrically connects the first sub-touch electrode and the second sub-touch electrode on both sides of the via hole;

[0032] The second touch pattern is located on a side of the connection structure close to the via hole and is electrically connected to the connection structure.

[0033] In a possible implementation manner, the second touch pattern is in a ring shape surrounding the via hole.

[0034] In a possible implementation, the touch structure layer further includes: a plurality of first compensation structures located on a side of the connection structure away from the via hole; the plurality of first compensation structures surround the via hole;

[0035] The first compensation structure is electrically connected to the first touch electrode block around the via hole.

[0036] In a possible implementation, the touch structure layer further includes an anti-static structure; the anti-static structure is located on a side of the second touch pattern facing the via hole.

[0037] In a possible implementation, the shielding structure includes: at least one of the connecting structure, the first compensation structure, and the anti-static structure.

[0038] In a possible implementation manner, the first touch electrode block and the second touch electrode block are located in the same layer;

[0039] The second touch pattern and the first touch electrode block are formed in the same layer and made of the same material.

[0040] In a possible implementation, the touch structure layer further includes: a second compensation structure; the second compensation structure is located on a side of the second touch pattern close to the via hole, and is electrically connected to the second touch pattern.

[0041] An embodiment of the present disclosure further provides a touch display device, which includes the touch display panel provided in the embodiment of the present disclosure.

[0042] In a possible implementation, the touch display device further includes: a middle frame located on the backlight side of the touch display panel, and a cover plate located on the light-emitting side of the touch display panel.

[0043] In a possible implementation manner, the cover plate is further provided with a second light shielding layer on a side facing the touch display panel;

[0044] The orthographic projection of the second light shielding layer on the substrate surrounds the via hole, and the orthographic projection of the second light shielding layer on the substrate extends from the via hole to the display area, covering at least a portion of the first area;

[0045] An orthographic projection of the second light shielding layer on the substrate and an orthographic projection of the second touch pattern on the substrate have an overlapping area. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] FIG1A is a schematic diagram of a touch unit;

[0047] FIG1B is a partial enlarged schematic diagram of FIG1A ;

[0048] FIG2 is a schematic diagram showing a display device with a bright edge around a via hole;

[0049] FIG3A is a partial top view of a touch display panel according to an embodiment of the present disclosure;

[0050] FIG3B is a partial enlarged schematic diagram of FIG3A ;

[0051] FIG4A is a partial enlarged schematic diagram of a first touch pattern and a second touch pattern provided by an embodiment of the present disclosure;

[0052] FIG4B is a second partially enlarged schematic diagram of the first touch pattern and the second touch pattern provided in an embodiment of the present disclosure;

[0053] FIG4C is a third partially enlarged schematic diagram of the first touch pattern and the second touch pattern provided in an embodiment of the present disclosure;

[0054] FIG4D is a fourth partially enlarged schematic diagram of the first touch pattern and the second touch pattern provided in an embodiment of the present disclosure;

[0055] FIG5 is a schematic diagram of a screenshot corresponding to the point aa′ in FIG3A ;

[0056] FIG6 is a second schematic screenshot corresponding to the point aa′ in FIG3A ;

[0057] FIG7A is a third screenshot corresponding to the section aa′ in FIG3A ;

[0058] FIG7B is a schematic diagram showing the distribution of the first light shielding layer and the second light shielding layer at the via hole position provided by an embodiment of the present disclosure;

[0059] FIG7C is an enlarged schematic diagram of the dotted line frame S3 in FIG7B ;

[0060] FIG8A may be a schematic structural diagram of a display device in a display area according to an embodiment of the present disclosure;

[0061] FIG8B may be an enlarged schematic diagram showing the structural layer X in FIG8A ;

[0062] FIG8C is an enlarged schematic diagram showing the structure layer around the via hole K;

[0063] FIG9A is a second partial top view schematic diagram of a touch display panel provided by an embodiment of the present disclosure;

[0064] FIG9B is a partial enlarged schematic diagram of FIG9A ;

[0065] FIG10A is a third partial top view of a touch display panel provided by an embodiment of the present disclosure;

[0066] FIG10B is a partially enlarged schematic diagram of FIG10A;

[0067] FIG11A is a fourth partial top view of a touch display panel provided by an embodiment of the present disclosure;

[0068] FIG11B is a partially enlarged schematic diagram of FIG11A ;

[0069] FIG12A is a fifth partial top view of a touch display panel provided by an embodiment of the present disclosure;

[0070] FIG12B is a partial enlarged schematic diagram of FIG12A;

[0071] FIG13A is a sixth partial top view of a touch display panel provided by an embodiment of the present disclosure;

[0072] FIG13B is a partially enlarged schematic diagram of FIG13A . DETAILED DESCRIPTION

[0073] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0074] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0075] In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits detailed descriptions of known functions and known components.

[0076] The touch display panel includes multiple touch units (Sensor), as shown in Figures 1A and 1B. Figure 1B is a partially enlarged schematic diagram of Figure 1A. The touch unit is usually square and is divided into a driving part, a sensing part, a bridging part, and a connecting via according to its function. The driving part is two independent driving pattern blocks, and the sensing part is a sensing pattern block. The driving pattern block and the sensing pattern block are located on the same metal layer (such as the TMB metal layer), and the bridging part is located on another metal layer (such as the TMA metal layer). Connecting vias are formed at both ends of the bridging part for connecting independent driving pattern blocks (of course, the bridging part can also be used to connect independent sensing pattern blocks). The entire touch panel is formed by an array of multiple touch units, with the driving channel extending longitudinally and the sensing channel extending laterally.

[0077] At the via hole position in the display area, the touch unit is cut off by the via hole and becomes incomplete. The area between the display area and the cutting line (i.e., the outer edge of the via hole) is designed with a large ring metal, such as a TMB ring metal made of a TMB metal layer near the display area (a solid surface metal without mesh holes, while the touch unit is a metal mesh with mesh holes), and a TMA ring metal made of a TMA metal layer away from the display area; one of the functions of the TMB ring metal and the TMA ring metal is to cover the gap between the display area and the second light-shielding layer (such as ink) of the cover plate to prevent light leakage; the second function is to play the role of connection, capacitance compensation, electrostatic shielding, etc.; in addition In the area between the cutting paths of the display area, a retaining wall structure is usually provided. Since the area between the retaining wall structure and the via hole is not covered and filled with an organic layer, the step difference at different positions is large. The touch unit, TMB ring metal, and TMA ring metal usually end at the side of the retaining wall structure away from the via hole to avoid short circuit problems caused by the large step difference when crossing the retaining wall structure toward the via hole. Since the TMB ring metal and the driving pattern block and the sensing pattern block in the touch unit are located on the same layer, the touch unit can only end at the boundary of the display area and cannot expand outward, which affects the touch performance.

[0078] Figure 2 shows a design with a high risk of light leakage. The touch unit is expanded outward, and there is no structure between the display area AA and the second light-shielding layer (such as ink) on the cover plate to effectively block the reflection of the middle frame below the touch display panel. From a macroscopic perspective, it is easy to observe the bright edge around the via hole, which is a light leakage problem and affects the user experience.

[0079] In order to avoid light leakage around the via hole, the touch unit cannot be expanded outward and usually ends at the edge of the display area (AA).

[0080] In view of this, an embodiment of the present disclosure provides a touch display panel, as shown in Figures 3A, 3B, 5, 6, and 7A, wherein Figure 3B is a partially enlarged schematic diagram of Figure 3A, Figure 5 is one of the schematic screenshots corresponding to the section aa' of Figure 3A, Figure 6 is a second schematic screenshot corresponding to the section aa' of Figure 3A, and Figure 7A is a third schematic screenshot corresponding to the section aa' of Figure 3A. The touch display panel has a via hole K penetrating the touch display panel, a display area AA located outside the via hole K, and a first area C located between the via hole K and the display area AA. The touch display panel includes:

[0081] Substrate 1;

[0082] The shielding structure Z is located in the first area on one side of the substrate 1 and surrounds the periphery of the via K. The shielding structure Z is an orthographic projection on the substrate 1;

[0083] The touch structure layer T is located on the same side of the substrate 1 as the shielding structure 2. The touch structure layer T includes: a first touch pattern T1 and a second touch pattern T2. ​​The first touch pattern T1 is located in the display area AA, and the second touch pattern T2 is located in the first area C. The first touch pattern T1 and the second touch pattern T2 are both mesh structures including multiple first openings w1.

[0084] In the embodiment of the present disclosure, the touch display panel has a blocking structure Z, and the blocking structure Z extends from the display area AA toward the via K, covering at least a portion of the first area C, thereby shielding the first area C between the display area AA and the via K; the touch structure T includes: a second touch pattern T2 located in the first area C, that is, the touch structure layer T is not only distributed in the display area AA, but also extends outward to the first area between the display area AA and the via K, thereby increasing the touch area of ​​the touch structure layer around the via K, improving the touch performance, and improving the problem that the touch unit becomes incomplete due to being cut by the via K, the touch unit pattern is missing, and the touch performance is affected.

[0085] In a possible embodiment, the enlarged schematic diagrams of the first touch pattern T1 and the second touch pattern T2 can be shown in Figures 4A to 4D, both of which can be mesh structures including multiple first openings w1. It can be seen from the enlarged schematic diagrams of the first touch pattern T1 and the second touch pattern T2 that the first touch pattern T1 and the second touch pattern T2 themselves have more mesh holes and cannot be used for light shielding. Therefore, other structures are required in the area around the via K for light shielding.

[0086] In one possible embodiment, as shown in FIG5 , the display panel further includes: a filter structure layer Q; the filter structure layer Q includes a first shielding portion Z1, the first shielding portion Z1 being located in the first region C; and the shielding structure Z includes the first shielding portion Z1. In this disclosed embodiment, the structure of the filter structure layer can be utilized to shield the first region C from light, preventing light leakage around the via hole K. The touch structure layer can be expanded outward to the first region C, increasing the touch area of ​​the touch structure layer around the via hole K, improving touch performance, and addressing issues such as incomplete touch cells due to being cut by the via hole K, resulting in missing touch cell patterns and reduced touch performance.

[0087] In a possible implementation, as shown in FIG. 5 , the filter structure layer Q is located on a side of the touch structure layer T facing away from the substrate 1 .

[0088] In one possible embodiment, as shown in FIG6 , the touch display panel further includes: a pixel definition layer 2; the pixel definition layer 2 includes: a second shielding portion Z2, the second shielding portion Z2 being located in the first zone C; and the shielding structure Z including the second shielding portion Z2. In the disclosed embodiment, the display panel further includes a pixel definition layer 2, the pixel definition layer 2 includes: a second shielding portion Z2 located in the first zone C; the shielding structure Z includes the second shielding portion Z2, and the pixel definition layer 2 can be used to shield the first zone C from light, thereby preventing light leakage around the via K. The touch structure layer can be expanded outward to the first zone C, thereby increasing the touch area of ​​the touch structure layer around the via K, improving touch performance, and improving the problem that the touch unit becomes incomplete due to being cut by the via K, the touch unit pattern is missing, and the touch performance is affected.

[0089] In a possible embodiment, referring to Figures 7A-7C, Figure 7B is a schematic diagram of the distribution of the first light-shielding layer and the second light-shielding layer at the via position provided in an embodiment of the present disclosure, and Figure 7C is an enlarged schematic diagram of the dotted frame S3 in Figure 7B. The touch display panel also includes: an active layer 3 located between the substrate 1 and the touch structure layer T, and a first light-shielding layer L1 located between the active layer 3 and the substrate 1; the first light-shielding layer L1 includes: a plurality of third light-shielding portions Z3 located in the display area AA, and a third light-shielding portion Z3 located in the first area C; the blocking structure Z includes a third light-shielding portion Z3.

[0090] In the embodiment of the present disclosure, the display panel also includes a first light-shielding layer L1, and the first light-shielding layer L1 includes: a third light-shielding portion Z3 located in the first zone C; the blocking structure Z includes the third light-shielding portion Z3, and the third light-shielding portion Z3 can be used to achieve light shielding of the first zone C to avoid light leakage around the via K; the touch structure layer can be expanded outward to the first zone C, thereby increasing the touch area of ​​the touch structure layer around the via K, improving the touch performance, and improving the problem that the touch unit becomes incomplete due to being cut by the via K, the touch unit pattern is missing, and the touch performance is affected.

[0091] In a possible embodiment, in combination with Figures 5, 6 and 7A, a cover plate B may be provided on the light-emitting side of the touch display panel, and a second light-shielding layer L2 may be provided on the side of the cover plate B facing the touch display panel; the blocking structure Z extends from the display area AA to the side of the via K, and the second light-shielding layer L2 extends from the via K to the side of the display area AA. The orthographic projection of the blocking structure Z may overlap with the orthographic projection of the second light-shielding layer L2, and the sum of the orthographic projections of the blocking structure Z and the second light-shielding layer L2 may cover the entire first area C, thereby achieving complete light shielding of the area between the display area AA and the via K, avoiding the problem of external ambient light passing through a position in the first area C that is not blocked by the second light-shielding layer L2 when the blocking structure Z is not provided. The incident light will be incident on the middle frame on the backlight side of the touch display panel and reflected by the middle frame, causing a bright edge around the via K.

[0092] It should be noted that Figures 5, 6 and 7A are only used to clearly illustrate the shading process of the shielding structure Z, and part of the display device structure is shown, but the embodiments of the present disclosure are not limited to this. In a possible implementation, refer to Figures 8A, 8B and 8C, where Figure 8A can be a structural schematic diagram of a display device in the display area provided by the embodiment of the present disclosure, Figure 8B can be an enlarged schematic diagram of the display structure layer X in Figure 8A, and Figure 8C can be an enlarged schematic diagram of the display structure layer around the via K; in combination with Figures 7C, 8A, 8B and 8C, the active layer 3 includes a plurality of active portions 30 located in the display area AA; the first shading layer L1 includes: a plurality of fourth shading portions Z4 located in the display area AA; wherein, the orthographic projection of the fourth shading portion Z4 on the substrate 1 covers the orthographic projection of the active portion 30 on the substrate 1.

[0093] In a possible embodiment, in combination with what is shown in FIG7C , the first light-shielding layer L1 further includes: a plurality of connection structures L11 located in the display area AA; a plurality of third shielding portions Z3 are electrically connected through the plurality of connection structures L11, and the plurality of third shielding portions Z3 and the plurality of connection structures L11 form a mesh structure having a plurality of second openings w2.

[0094] 7C , the third light shielding portion Z3 is an integral planar structure surrounding the via K. That is, the third light shielding portion Z3 has a different composition from the first light shielding layer L1 in the display area AA and is a solid planar metal structure without mesh holes.

[0095] In one possible embodiment, in combination with Figures 8A, 8B and 8C, the display device may include an encapsulation layer E located on the side of the display structure layer X facing away from the substrate 1, a touch structure layer T located on the side of the encapsulation layer E facing away from the display structure layer, and a color filter structure layer Q located on the side of the touch structure layer T facing away from the encapsulation layer E; wherein the color filter structure layer Q may include a black matrix layer Q1 and a color filter layer Q2; the color filter structure layer Q can replace a conventional polarizer to avoid the problem that external ambient light and natural light are reflected when irradiating the display panel, thereby affecting the display effect. Moreover, compared with attaching a polarizer separately, integrating the color filter structure layer Q in the touch display panel can improve the contrast and brightness of the touch display panel, reduce the thickness of the touch display panel, and have multiple advantages such as power consumption; on this basis, the embodiment of the present disclosure further uses the black matrix layer Q1 in the color filter structure layer Q to make a first blocking portion Z1, which can simultaneously avoid light leakage of the touch display device around the via K, further expand the touch unit pattern outward, and improve touch performance.

[0096] In one possible embodiment, as shown in FIG8A, FIG8B and FIG8C, the display structure layer X may include: a first gate metal layer 41 located on the side of the active layer 3 facing away from the substrate 1, a second gate metal layer 42 located on the side of the first gate layer 41 facing away from the substrate 1, a first source-drain electrode layer 5 located on the side of the second gate metal layer 42 facing away from the substrate 1, a second source-drain electrode layer 6 located on the side of the first source-drain electrode layer 5 facing away from the substrate 1, an anode layer 8 located on the side of the second source-drain electrode layer 6 facing away from the substrate 1, and a second source-drain electrode layer 6 located on the side of the second source-drain electrode layer 6 facing away from the substrate 1. 1, and a spacer 91 located on the side of the pixel definition layer away from the substrate 1; wherein, in one possible embodiment, the pixel definition layer 2 can be made of black opaque material, and the pixel definition layer 2 can include a second shielding portion Z2, that is, the pixel definition layer 2 is reused to form a shielding structure Z, so as to avoid light leakage around the via K of the touch display device, further expand the touch unit pattern, improve the touch performance, and avoid increasing the production process of the touch display panel when the shielding structure Z is set separately, thereby increasing the production cost of the touch display panel.

[0097] In a possible embodiment, as shown in FIG8A, FIG8B and FIG8C, the substrate 1 may include a composite structure of a plurality of stacked film layers. For example, the substrate 1 may include: a first organic layer 101, a first inorganic layer 102, a second organic layer 103, and a second inorganic layer 104 stacked in sequence; wherein the material of the first organic layer 101 and the second organic layer 103 may include polyimide; a first barrier layer 105 and a first buffer layer 106 may be further included between the first light-shielding layer L1 and the active layer 3; a first gate insulating layer 107 may be further included between the active layer 3 and the first gate metal layer 41; and a second gate metal layer 42 may be provided. A second gate insulating layer 108 may also be provided between 42 and the first gate metal layer 41; an interlayer dielectric layer 109 may also be provided between the second gate metal layer 42 and the first source and drain layer 5; a passivation layer 110 and a first flattening layer 111 may also be provided between the first source and drain layer 5 and the second source and drain layer 6; a second flattening layer 112 may also be provided between the second source and drain layer 6 and the anode layer 8; a second buffer layer 113 may also be provided between the encapsulation layer E and the touch structure layer T; a first optical adhesive layer OC1 may also be provided between the touch structure layer T and the color filter structure layer Q, and a second optical adhesive layer OC2 may also be provided on the side of the color filter structure layer Q facing away from the touch structure layer T.

[0098] In a possible embodiment, as shown in FIG8A and FIG8C , the encapsulation layer E may be a thin film encapsulation layer, and specifically may include a first inorganic encapsulation layer E1 , an organic encapsulation layer E3 , and a second inorganic encapsulation layer E2 that are stacked.

[0099] In one possible embodiment, as shown in FIG8C , the touch display panel further includes: a retaining wall structure D and a first isolation structure G1 between the substrate 1 and the touch structure layer T; the retaining wall structure D is located in the first region C and surrounds the via K; the first isolation structure G1 is located between the retaining wall structure D and the via K and surrounds the via K; as shown in FIG3A , FIG3B , and FIG8C , the orthographic projection of the second touch pattern T2 on the substrate 1 is located on the side of the orthographic projection of the retaining wall structure D on the substrate 1 that is away from the via K. In the disclosed embodiment, as shown in FIG3A , the second touch pattern T2 may terminate at the retaining wall structure D, that is, the retaining wall structure D does not enter the area between the retaining wall structure D and the via K, thereby avoiding the problem of the first isolation structure G1 between the retaining wall structure D and the via K causing a short circuit in the second touch pattern T2.

[0100] In a possible embodiment, in combination with Figure 8C, the touch display panel further includes: a retaining wall structure D, a first isolation structure G1, and a first filling layer 115 covering at least the first isolation structure G1 between the substrate 1 and the touch structure layer T; the retaining wall structure D is located in the first area C and surrounds the via K; the first isolation structure G1 is located between the retaining wall structure D and the via K and surrounds the via K; in combination with Figures 9A and 9B, Figure 9B is a partially enlarged schematic diagram of Figure 9A, the orthographic projection of the second touch pattern T2 on the substrate 1, covering the retaining wall structure D and at least part of the orthographic projection of the first isolation structure G1 on the substrate 1. In the embodiment of the present disclosure, the touch display panel also includes a first filling layer 115. The first filling layer 115 can flatten the first isolation structure G1. In this way, the second touch pattern T2 can further expand outward to cover the retaining wall structure D and at least part of the first isolation structure G1, thereby further increasing the touch area of ​​the touch structure layer around the via K, improving the touch performance, and improving the problem that the touch unit becomes incomplete due to being cut by the via K, the touch unit pattern is missing, and the touch performance is affected.

[0101] In a possible embodiment, as shown in Figures 8B and 8C, the first isolation structure G1 may have the same composition as the second source and drain layer 6. The first isolation structure G1 may specifically include a first metal layer 501, a second metal layer 502, and a third metal layer 503 that are stacked; the material of the first metal layer 501 may include titanium, the material of the second metal layer 502 may include aluminum, and the material of the third metal layer 503 may include titanium.

[0102] In a possible embodiment, as shown in Figures 8A, 8B and 8C, the touch display panel may further include a second retaining wall structure G2 located on a side of the retaining wall structure D away from the via K. The second retaining wall structure G2 may have the same composition as the first retaining wall structure G1.

[0103] In one possible embodiment, as shown in FIG3A or FIG9A , the touch structure layer T further includes an anti-static structure TA; and the orthographic projection of the second touch pattern T2 on the substrate 1 is located on a side of the anti-static structure TA on the substrate 1 away from the via K. In the disclosed embodiment, the touch display structure layer T further includes the anti-static structure TA, which can act as an electrostatic shield to prevent electrostatic damage to the touch structure layer. Furthermore, the orthographic projection of the second touch pattern T2 on the substrate 1 is located on a side of the anti-static structure TA on the substrate 1 away from the via K, thereby preventing electrical connection between the first touch pattern T1 and / or the second touch pattern T2 and the anti-static structure TA.

[0104] In a possible implementation, as shown in FIG. 3A , the orthographic projection of the anti-static structure TA on the substrate 1 is located on a side of the orthographic projection of the retaining wall structure D on the substrate 1 away from the via K.

[0105] In one possible embodiment, as shown in conjunction with FIG10A and FIG10B , FIG10B is a partially enlarged schematic diagram of FIG10A , in which the orthographic projection of the anti-static structure TA on the substrate 1 is located on the side of the orthographic projection of the retaining wall structure D on the substrate 1 that is close to the via K. In the disclosed embodiment, the orthographic projection of the anti-static structure TA on the substrate 1 is located on the side of the orthographic projection of the retaining wall structure D on the substrate 1 that is close to the via K. That is, the anti-static structure TA is moved between the retaining wall structure D and the via K, and the second touch pattern T2 can be further expanded outward, thereby further increasing the touch area of ​​the touch structure layer around the via K, improving touch performance, and alleviating the problem of the touch unit being incomplete due to being cut by the via K, the touch unit pattern being missing, and the touch performance being affected.

[0106] In a possible implementation, in combination with Figures 11A and 11B, Figure 11B is a partially enlarged schematic diagram of Figure 11A, and the anti-static structure TA can also be eliminated. In this way, the second touch pattern T2 can be further expanded outward, thereby further increasing the touch area of ​​the touch structure layer around the via K, improving the touch performance, and improving the problem that the touch unit becomes incomplete due to being cut by the via K, the touch unit pattern is missing, and the touch performance is affected.

[0107] In a possible implementation, as shown in combination with FIG. 3A , FIG. 9A , and FIG. 10A , the anti-static structure TA includes: a plurality of arc segments that are spaced apart from each other and surround the via hole.

[0108] In one possible embodiment, as shown in Figure 3A, the touch structure layer T includes: a plurality of first touch electrodes TX extending along the first direction X, and a plurality of second touch electrodes TY extending along the second direction Y; the first touch electrodes TX include a plurality of first touch electrode blocks TX0 arranged in sequence and electrically connected along the first direction X, and the second touch electrodes TY include a plurality of second touch electrode blocks TY0 arranged in sequence and electrically connected along the second direction Y; one of the first touch electrode blocks TX0 and the second touch electrode blocks TY0 includes a third touch electrode block TZ, and the via K is located in the third touch electrode block TZ; the third touch electrode block TZ includes a second touch pattern 32.

[0109] In a possible implementation, as shown in FIG. 3A , the third touch electrode block TZ has a first hollow TZ0 ; the orthographic projection of the first hollow TZ0 on the substrate 1 covers the orthographic projection of the via K on the substrate 1 .

[0110] In one possible implementation, FIG12A and FIG12B are combined, with FIG12B being a partially enlarged schematic diagram of FIG12A , in which the touch structure layer T includes: a plurality of first touch electrodes TX extending along a first direction X, and a plurality of second touch electrodes TY extending along a second direction Y; the first touch electrodes TX include a plurality of first touch electrode blocks TX0 sequentially arranged and electrically connected along the first direction X, and the second touch electrodes TY include a plurality of second touch electrode blocks TY0 sequentially arranged and electrically connected along the second direction Y; at least one second touch electrode TY is divided by a via K into a discontinuous first sub-touch electrode TY1 and a discontinuous second sub-touch electrode TY2;

[0111] The touch structure layer further includes: a connection structure TC; the connection structure TC is located in the first area C, surrounds the via hole K, and electrically connects the first sub-touch electrode TY1 and the second sub-touch electrode TY2 on both sides of the via hole K;

[0112] The second touch pattern T2 is located on a side of the connection structure close to the via hole K and is electrically connected to the connection structure TC.

[0113] In the embodiment of the present disclosure, the touch structure layer also includes a connecting structure TC, and the second touch pattern T2 is located on a side of the connecting structure close to the via K and is electrically connected to the connecting structure TC. The second touch pattern T2 is also expanded outward in the area between the connecting structure TC and the via K, thereby increasing the touch area of ​​the touch structure layer around the via K, improving the touch performance, and improving the problem that the touch unit becomes incomplete due to being cut by the via K, the touch unit pattern is missing, and the touch performance is affected.

[0114] In one possible embodiment, the outward expansion of the second touch pattern T2 shown in Figure 12A can be based on filling and flattening the first isolation structure G1 between the retaining wall structure D and the via K shown in Figure 8C, thereby avoiding short circuit of the second touch pattern T2 due to the unevenness of the first isolation structure G1 and achieving outward expansion of the second touch pattern T2.

[0115] In a possible implementation, as shown in FIG12A , the second touch pattern T2 is in a ring shape surrounding the via hole K. That is, the outer contour of the second touch pattern T2 is in a ring shape surrounding the via hole K.

[0116] In one possible implementation, as shown in FIG12A , the touch structure layer T further includes: a plurality of first compensation structures TB1 located on a side of the connection structure TC away from the via K; the plurality of first compensation structures TB1 surround the via K; and the first compensation structures TB1 are electrically connected to the first touch electrode blocks TX0 surrounding the via K. In the disclosed embodiment, the touch structure layer T further includes: a plurality of first compensation structures TB1 located on a side of the connection structure TC away from the via K. These structures can complement the first touch electrode blocks TX0 surrounding the via K, thereby reducing pattern differences from areas outside the via K and improving touch performance around the via K.

[0117] In a possible implementation, as shown in FIG. 12A , the touch structure layer T further includes an anti-static structure TA. The anti-static structure TA is located on a side of the second touch pattern T2 facing the via K.

[0118] In one possible embodiment, as shown in FIG12A , the shielding structure Z includes at least one of a connection structure TC, a first compensation structure TB1, and an anti-static structure TA. In the disclosed embodiment, at least one of the connection structure TC, the first compensation structure TB1, and the anti-static structure TA can be used as the shielding structure Z. This allows the second touch pattern T2 to expand outward in the area between the connection structure TC and the via K, thereby increasing the touch area of ​​the touch structure layer around the via K, while also shielding the periphery of the display area AA.

[0119] In a possible implementation, the shielding structure Z includes: a connecting structure TC, a first compensation structure TB1 , and an anti-static structure TA.

[0120] In a possible implementation, the connection structure TC, the first compensation structure TB1, and the anti-static structure TA may be solid planar electrodes without meshes.

[0121] In a possible implementation, the first touch electrode block TX0 and the second touch electrode block TY0 are located in the same layer; the second touch pattern T2 and the first touch electrode block TX0 are made of the same layer and material.

[0122] In a possible implementation, the connection structure TC and the first compensation structure TB1 may be in the same layer and made of the same material as the first touch electrode block TX0 ; and the anti-static structure TA may be in a different layer from the first touch electrode block TX0 .

[0123] In a possible embodiment, referring to FIG12A , the touch structure layer further includes: a bridging portion TL, in an area other than the via K, two adjacent second touch electrode blocks TY0 can be electrically connected through the bridging portion TL; specifically, the bridging portion TL can be located on a different layer from the second touch electrode block TY0, specifically, can be located between the second touch electrode block TY0 and the substrate 1, and can be electrically connected to different second touch electrode blocks TY0 through punching; specifically, the anti-static structure TA can be on the same layer and made of the same material as the bridging portion TL.

[0124] In one possible embodiment, referring to Figures 13A and 13B (Figure 13B is a partially enlarged schematic diagram of Figure 13A), the touch structure layer T further includes a second compensation structure TB2; the second compensation structure TB2 is located on a side of the second touch pattern T2 near the via K and is electrically connected to the second touch pattern T2. ​​In the disclosed embodiment, the touch structure layer T further includes the second compensation structure TB2 to supplement the second touch electrode block TY0 around the via K, thereby reducing the pattern difference from areas outside the via K and improving touch performance around the via K.

[0125] It should be noted that the embodiment of the present disclosure only takes the positional relationship between the retaining wall structure D and the anti-static structure TA shown in Figure 13A as an example to illustrate that the touch structure layer T also includes the second compensation structure TB. When the retaining wall structure D and the anti-static structure TA are in other positional relationships, the touch structure layer T may also include the second compensation structure TB. The embodiment of the present disclosure is not limited to this.

[0126] Based on the same inventive concept, an embodiment of the present disclosure further provides a touch display device, which includes the touch display panel provided by the embodiment of the present disclosure.

[0127] In a possible implementation, referring to FIG. 5 , FIG. 6 and FIG. 7A , the touch display device further includes: a middle frame P located on the backlight side of the touch display panel, and a cover plate B located on the light emitting side of the touch display panel.

[0128] In one possible embodiment, the cover plate B is further provided with a second light-shielding layer L2 on the side facing the touch display panel. The orthographic projection of the second light-shielding layer L2 on the substrate 1 surrounds the via K and extends from the via K toward the display area AA, covering at least a portion of the first area C. The orthographic projection of the second light-shielding layer L2 on the substrate 1 overlaps with the orthographic projection of the second touch pattern T2 on the substrate Z. Specifically, the orthographic projection of the second light-shielding layer L2 on the substrate 1 overlaps with the orthographic projection of the shielding structure Z on the substrate Z.

[0129] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0130] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if such changes and modifications of the embodiments of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A touch display panel comprising a via hole extending through the touch display panel, a display area located outside the via hole, and a first area located between the via hole and the display area, wherein: The touch display panel includes: substrate; a shielding structure, located in the first region on one side of the substrate and surrounding the periphery of the via hole, the shielding structure having an orthographic projection on the substrate; A touch structure layer is located on the same side of the substrate as the shielding structure, and the touch structure layer includes: a first touch pattern and a second touch pattern, wherein the first touch pattern is located in the display area and the second touch pattern is located in the first area; the first touch pattern and the second touch pattern are both mesh structures including multiple first openings.

2. The touch display panel according to claim 1, wherein: The display panel further includes: a light filtering structure layer; The light filtering structure layer includes: a first blocking portion, which is located in the first area; and the blocking structure includes the first blocking portion.

3. The touch display panel according to claim 2, wherein: The light filtering structure layer is located on a side of the touch structure layer facing away from the substrate.

4. The touch display panel according to claim 1, wherein: The touch display panel further includes: a pixel definition layer; The pixel definition layer includes: a second blocking portion, which is located in the first area; and the blocking structure includes the second blocking portion.

5. The touch display panel according to claim 1, wherein: The touch display panel further includes: an active layer located between the substrate and the touch structure layer, and a first light shielding layer located between the active layer and the substrate; The first light-shielding layer includes: a third light-shielding portion located in the first area; and the light-shielding structure includes the third light-shielding portion.

6. The touch display panel according to claim 5, wherein: The active layer includes a plurality of active portions located in the display area; The first light-shielding layer includes: a plurality of fourth light-shielding portions located in the display area; wherein the orthographic projections of the fourth light-shielding portions on the substrate cover the orthographic projections of the active portion on the substrate.

7. The touch display panel according to claim 5 or 6, wherein: The first light-shielding layer further includes: a plurality of connection structures located in the display area; the plurality of fourth shielding portions are electrically connected via the plurality of connection structures, and the plurality of fourth shielding portions and the plurality of connection structures form a mesh structure having a plurality of second openings.

8. The touch display panel according to any one of claims 1 to 7, wherein: The touch display panel further includes: a retaining wall structure and a first isolation structure between the substrate and the touch structure layer; the retaining wall structure is located in the first area and surrounds the via hole; the first isolation structure is located between the retaining wall structure and the via hole and surrounds the via hole; The orthographic projection of the second touch pattern on the substrate is located on a side of the orthographic projection of the retaining wall structure on the substrate away from the via hole.

9. The touch display panel according to any one of claims 1 to 7, wherein: The touch display panel further includes, between the substrate and the touch structure layer: a retaining wall structure, a first isolation structure, and a first filling layer covering at least the first isolation structure; the retaining wall structure is located in the first area and surrounds the via hole; the first isolation structure is located between the retaining wall structure and the via hole and surrounds the via hole; The orthographic projection of the second touch pattern on the substrate covers the orthographic projection of the retaining wall structure and at least a portion of the first isolation structure on the substrate.

10. The touch display panel according to any one of claims 1 to 9, wherein: The touch structure layer further includes: an anti-static structure; The orthographic projection of the second touch pattern on the substrate is located on a side of the orthographic projection of the anti-static structure on the substrate away from the via hole.

11. The touch display panel according to claim 10, wherein: The orthographic projection of the anti-static structure on the substrate is located on a side of the orthographic projection of the retaining wall structure on the substrate close to the via hole.

12. The touch display panel according to claim 10 or 11, wherein: The anti-static structure includes: a plurality of arc segments spaced apart from each other and surrounding the via hole.

13. The touch display panel according to any one of claims 1 to 12, wherein: The touch structure layer includes: a plurality of first touch electrodes extending along a first direction, and a plurality of second touch electrodes extending along a second direction; the first touch electrodes include a plurality of first touch electrode blocks sequentially arranged and electrically connected along the first direction, and the second touch electrodes include a plurality of second touch electrode blocks sequentially arranged and electrically connected along the second direction; One of the first touch electrode block and the second touch electrode block includes a third touch electrode block, and the via hole is located in the third touch electrode block; The third touch electrode block includes the second touch pattern.

14. The touch display panel according to claim 13, wherein: The third touch electrode block has a first hollow; the orthographic projection of the first hollow on the substrate covers the orthographic projection of the via hole on the substrate.

15. The touch display panel according to claim 1, wherein: The touch structure layer includes: a plurality of first touch electrodes extending along a first direction, and a plurality of second touch electrodes extending along a second direction; the first touch electrodes include a plurality of first touch electrode blocks sequentially arranged and electrically connected along the first direction, and the second touch electrodes include a plurality of second touch electrode blocks sequentially arranged and electrically connected along the second direction; at least one of the second touch electrodes is divided into a discontinuous first sub-touch electrode and a discontinuous second sub-touch electrode by the via hole; The touch structure layer further includes: a connection structure; the connection structure is located in the first area, surrounds the via hole, and electrically connects the first sub-touch electrode and the second sub-touch electrode on both sides of the via hole; The second touch pattern is located on a side of the connection structure close to the via hole and is electrically connected to the connection structure.

16. The touch display panel according to claim 15, wherein: The second touch pattern is in a ring shape surrounding the via hole.

17. The touch display panel according to claim 16, wherein: The touch structure layer further includes: a plurality of first compensation structures located on a side of the connection structure away from the via hole; the plurality of first compensation structures surround the via hole; The first compensation structure is electrically connected to the first touch electrode block around the via hole.

18. The touch display panel according to any one of claims 15 to 17, wherein: The touch structure layer further includes an anti-static structure; the anti-static structure is located on a side of the second touch pattern facing the via hole.

19. The touch display panel according to any one of claims 15 to 18, wherein: The shielding structure includes: at least one of the connecting structure, the first compensation structure, and the anti-static structure.

20. The touch display panel according to any one of claims 14 to 19, wherein: The first touch electrode block and the second touch electrode block are located in the same layer; The second touch pattern and the first touch electrode block are formed in the same layer and made of the same material.

21. The touch display panel according to any one of claims 1 to 20, wherein: The touch structure layer further includes: a second compensation structure; the second compensation structure is located on a side of the second touch pattern close to the via hole and is electrically connected to the second touch pattern.

22. A touch display device, wherein: Comprising the touch display panel as described in any one of claims 1-21.

23. The touch display device according to claim 22, wherein: The touch display device further includes: a middle frame located on the backlight side of the touch display panel, and a cover plate located on the light-emitting side of the touch display panel.

24. The touch display device according to claim 23, wherein: The cover plate is further provided with a second light shielding layer on a side facing the touch display panel; The orthographic projection of the second light shielding layer on the substrate surrounds the via hole, and the orthographic projection of the second light shielding layer on the substrate extends from the via hole to the display area, covering at least a portion of the first area; An orthographic projection of the second light shielding layer on the substrate and an orthographic projection of the second touch pattern on the substrate have an overlapping area.

Images