Touch display substrate and touch display device

Abstract

The utility model provides a touch display substrate and a touch display device, belongs to the technical field of display, and can solve the problems that the uniformity of touch signals in different areas of an existing touch display substrate is poor, and the touch effect is affected. The touch display substrate is provided with a plurality of touch areas arranged in an array mode. The touch display substrate comprises a substrate body, a plurality of rows of first touch electrodes and a plurality of columns of second touch electrodes, wherein the first touch electrodes and the second touch electrodes are located on the substrate body and arranged in each touch area. The first touch electrode comprises a plurality of first touch electrode blocks which are arranged in the row direction and are electrically connected; the second touch electrode comprises a plurality of second touch electrode blocks which are arranged in the column direction and are electrically connected; in each touch area, the area of the first touch electrode blocks in the first row and the area of the first touch electrode blocks in the last row are both larger than half of the area of the first touch electrode blocks in the middle row, and the area of the second touch electrode blocks in the first column and the area of the second touch electrode blocks in the last column are both larger than half of the area of the second touch electrode blocks in the middle column.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of display, and particularly relates to a touch display substrate and a touch display device. Background Art

[0002] With the continuous development of display technology, touch display devices are increasingly widely used. A touch display device integrates a touch substrate and a display substrate. When using a touch display device, a user can directly input or control operations through touch, making the application of touch display devices more convenient.

[0003] At present, most touch display devices generally use finger touch to implement the touch function. Since the touch area of a finger is relatively large, the touch accuracy requirement is relatively low. However, with the diversification of network education and office scenarios, touch display devices are gradually popularized in the business and education fields, and users have put forward higher requirements for the touch experience of touch display devices. For example, a stylus is used to implement the touch function. Since the touch area of the tip of the stylus is smaller, the current touch display devices cannot meet the requirements of users for high touch accuracy. Utility Model Content

[0004] The present disclosure aims to at least solve one of the technical problems existing in the prior art, and provides a touch display substrate and a touch display device.

[0005] In a first aspect, an embodiment of the present disclosure provides a touch display substrate having a plurality of touch areas arranged in an array. The touch display substrate includes: a substrate; a plurality of rows of first touch electrodes and a plurality of columns of second touch electrodes disposed on the substrate in each touch area; the first touch electrodes include: a plurality of first touch electrode blocks arranged along the row direction and electrically connected; the second touch electrodes include: a plurality of second touch electrode blocks arranged along the column direction and electrically connected;

[0006] In each touch area, the areas of the first row of the first touch electrode blocks and the last row of the first touch electrode blocks are both greater than half of the area of the middle row of the first touch electrode blocks, and the areas of the first column of the second touch electrode blocks and the last column of the second touch electrode blocks are both greater than half of the area of the middle column of the second touch electrode blocks.

[0007] In some embodiments, the first row of the first touch electrode blocks and the last row of the first touch electrode blocks both have a first edge away from the middle row of the first touch electrode blocks and parallel to the row direction; the length of the first edge is at least one-third of the maximum length of the first touch electrode block along the row direction;

[0008] The first and last second touch electrode blocks in the first column both have a second edge that is away from the second touch electrode block in the middle column and parallel to the column direction; the length of the second edge is at least one-third of the maximum length of the second touch electrode in the column direction.

[0009] In some embodiments, at least a part of the first touch electrode blocks in the middle row are provided with a first hollow structure, and at least a part of the second touch electrode blocks in the middle column are provided with a second hollow structure.

[0010] In some embodiments, the touch display substrate further includes: a plurality of first floating electrode blocks and a plurality of second floating electrode blocks;

[0011] The first floating electrode blocks are embedded in the first hollow structure and are disconnected from the first touch electrode blocks;

[0012] The second floating electrode blocks are embedded in the second hollow structure and are disconnected from the second touch electrode blocks.

[0013] In some embodiments, the touch display substrate further includes: a connection part and a bridging part; an insulating layer is provided between the connection part and the bridging part;

[0014] Adjacent first touch electrode blocks in the same row are connected by the connection part;

[0015] Adjacent second touch electrode blocks in the same column are connected to the bridging part through vias penetrating the insulating layer;

[0016] The connection part is provided on the same layer as the first touch electrode blocks, the second touch electrode blocks, the first floating electrode blocks, and the second floating electrode blocks.

[0017] In some embodiments, the touch display substrate further has a plurality of pixel areas provided in each touch area; the touch display substrate further includes: pixel units provided in the pixel areas;

[0018] The pixel units are located on the side of the film layer where the first touch electrode blocks and the second touch electrode blocks are located, closer to the substrate.

[0019] In some embodiments, the first touch electrode block includes: first grid lines; the second touch electrode block includes: second grid lines;

[0020] The orthographic projections of the first grid lines and the second grid lines on the substrate both fall between the orthographic projections of adjacent pixel units on the substrate.

[0021] In some embodiments, the touch display substrate further has an opening area surrounded by the pixel area and a transition area located between the opening area and the pixel area; both the first grid line and the second grid line extend to the transition area;

[0022] The arrangement density of the first grid line in the transition area is greater than that in the touch area;

[0023] The arrangement density of the second grid line in the transition area is greater than that in the touch area.

[0024] In some embodiments, the line width of the first grid line in the transition area is greater than that in the touch area;

[0025] The line width of the second grid line in the transition area is greater than that in the touch area.

[0026] In a second aspect, an embodiment of the present disclosure provides a touch display device, and the touch display device includes the touch display substrate provided as above. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of an exemplary touch display substrate.

[0028] Figure 2 For Figure 1 An enlarged schematic diagram of a touch area of the touch display substrate shown.

[0029] Figure 3 It is a schematic structural diagram of a touch display substrate provided by an embodiment of the present disclosure.

[0030] Figure 4 For Figure 3 An enlarged schematic diagram of a partial structure of a touch area of the touch display substrate shown.

[0031] Figure 5 It is a schematic structural diagram of another touch display substrate provided by an embodiment of the present disclosure.

[0032] Figure 6 For Figure 5 An enlarged schematic diagram of a partial structure of a touch area of the touch display substrate shown.

[0033] Figure 7 For Figure 4 An enlarged schematic diagram of a partial structure of area A of the touch display substrate shown.

[0034] Figure 8 For Figure 7 A schematic cross-sectional structure diagram of the touch display substrate along the I-I' direction shown.

[0035] Figure 9 is Figure 3 a partially enlarged schematic view of region B of the touch display substrate shown in Specific Embodiments

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only some of the embodiments of the present disclosure, rather than all the embodiments. Components of the embodiments of the present disclosure usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the present disclosure to be protected, but only represents selected embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts fall within the scope of protection of the present disclosure.

[0037] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should have the ordinary meanings understood by those of ordinary skill in the field to which the present disclosure belongs. The "first", "second", and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are only used to distinguish different components. Similarly, the terms such as "a", "an", or "the" do not denote a quantity limitation, but mean that there is at least one. The terms such as "include" or "comprise" mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items.

[0038] In the present disclosure, "a plurality of or several" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0039] Figure 1 is a schematic structural view of an exemplary touch display substrate, Figure 2 is Figure 1 an enlarged schematic view of a touch area of the touch display substrate shown in, such as Figure 1 and Figure 2As shown, the touch display substrate has a plurality of touch areas T arranged in an array; the touch display substrate includes: a substrate 100, a plurality of first touch electrodes 101 arranged in multiple rows and a plurality of second touch electrodes 102 arranged in multiple columns disposed on the substrate 100 and in each touch area T. The first touch electrodes 101 include: a plurality of first touch electrode blocks 1011 arranged in a row direction and electrically connected; the second touch electrodes 102 include: a plurality of second touch electrode blocks 1021 arranged in a column direction and electrically connected.

[0040] Among them, the first touch electrode block 1011 can specifically be a driving electrode block (Transmit, Tx), and the second touch electrode block 1021 can specifically be a sensing electrode block (Receive, Rx). A capacitance can be generated between the first touch electrode block 1011 and the second touch electrode block 1021. When a touch occurs, the capacitance between the first touch electrode block 1011 and the second touch electrode block 1021 can change, and the touch signal can be converted into a capacitance signal and transmitted to the touch driving chip to determine the position where the touch occurs and realize the touch function.

[0041] In practical applications, the first touch electrode block 1011 and the second touch electrode block 1021 generally adopt a diamond shape or a shape approximately diamond-shaped. Among them, "approximately diamond-shaped" means that the shape of the touch electrode block (i.e., the first touch electrode block 1011 and the second touch electrode block 1021) is generally diamond-shaped as a whole, but it is not limited to a standard diamond shape. For example, the boundary of the touch electrode block is allowed to be non-linear (such as serrated). Of course, the shapes of the first touch electrode block 1011 and the second touch electrode block 1021 are not limited to diamond or approximately diamond shapes, and can also be rectangular, strip-shaped, etc.

[0042] In Figure 1 and Figure 2 In the touch display substrate shown and the subsequent description, taking the shapes of the first touch electrode block 1011 and the second touch electrode block 1021 as diamond shapes as an example, due to the shapes of the first touch electrode block 1011 and the second touch electrode block 1021 and their arrangement methods, the edge area of the first touch electrode block 1011 and the second touch electrode block 1021 is significantly smaller than the central area. That is, in each touch area, the areas of the first touch electrode blocks 1011 in the first row and the last row are smaller than the area of the first touch electrode blocks 1011 in the middle row, and the areas of the second touch electrode blocks 1021 in the first column and the last column are smaller than the area of the second touch electrode blocks 1021 in the middle column. When a touch occurs, the capacitance changes in different regions in each touch area T are significantly different, making the touch signals at the edges significantly weaker than the touch signals at the center. Especially in the scenario of using a touch pen for touch, it seriously affects the touch accuracy of the touch display substrate and cannot meet the user's requirements for high touch accuracy.

[0043] To at least solve one of the above technical problems, embodiments of the present disclosure provide a touch display substrate and a touch display device. The touch display substrate and the touch display device provided by the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] In a first aspect, embodiments of the present disclosure provide a touch display substrate. Figure 3 FIG. is a schematic structural diagram of a touch display substrate provided by an embodiment of the present disclosure. Figure 4 is Figure 3 a partially enlarged schematic structural diagram of a touch area of the touch display substrate shown in FIG. Figure 5 FIG. is a schematic structural diagram of another touch display substrate provided by an embodiment of the present disclosure. Figure 6 is Figure 5 a partially enlarged schematic structural diagram of a touch area of the touch display substrate shown in FIG. As shown in FIG. Figures 3 to 6 the touch display substrate has a plurality of touch areas T arranged in an array. The touch display substrate includes: a substrate substrate 100, a plurality of first touch electrodes 101 arranged in multiple rows and a plurality of second touch electrodes 102 arranged in multiple columns disposed on each touch area T of the substrate substrate 100; the first touch electrodes 101 include: a plurality of first touch electrode blocks 1011 arranged along the row direction and electrically connected; the second touch electrodes 102 include: a plurality of second touch electrode blocks 1021 arranged along the column direction and electrically connected; in each touch area T, the areas of the first row of first touch electrode blocks 1011 and the last row of first touch electrode blocks 1011 are both greater than half of the area of the first touch electrode blocks 1011 in the middle row, and the areas of the first column of second touch electrode blocks 1021 and the last column of second touch electrode blocks 1021 are both greater than half of the area of the second touch electrode blocks 1021 in the middle column.

[0045] The substrate substrate 100 can be made of a rigid material such as glass, which can improve the load-bearing capacity of the substrate substrate 100 for other film layers thereon. Of course, the substrate substrate 100 can also be made of a flexible material such as polyimide (PI), which can improve the overall anti-bending and anti-stretching performance of the touch display substrate, and avoid the substrate substrate 100 from breaking due to stress generated during bending, stretching, and twisting, resulting in open-circuit defects. In practical applications, the material of the substrate substrate 100 can be reasonably selected according to actual needs to ensure that the touch display substrate has good performance.

[0046] It can be understood that structural film layers such as a buffer layer can also be provided on the substrate 100. The buffer layer can be made of at least one material selected from silicon nitride (SiN) and silicon dioxide (SiO2). It can form a single-layer structure made of a single material or a multi-layer structure made of multiple different materials, so as to prevent gases such as water and oxygen from invading other film layers on one side of the substrate 100 and damaging the touch display substrate.

[0047] The first touch electrode block 1011 can specifically be a driving electrode block (Transmit, Tx), and the second touch electrode block 1021 can specifically be a sensing electrode block (Receive, Rx). The first touch electrode block 1011 and the second touch electrode block 1021 can be made by the same process and of the same material. For example, both can be made of one or more of metals such as copper, aluminum, and titanium, specifically but not limited to titanium-aluminum-titanium alloy. And the first touch electrode block 1011 and the second touch electrode block 1021 can be made using the same mask plate, which can reduce the number of mask plates used and save costs.

[0048] In each touch area T, the areas of the first-row first touch electrode block 1011 and the last-row first touch electrode block 1011 are both greater than half of the area of the middle-row first touch electrode block 1011. The areas of the first-row first touch electrode block 1011 and the last-row first touch electrode block 1011 in each touch area T of the touch display substrate are significantly increased, making the areas of the first-row first touch electrode block 1011 and the last-row first touch electrode block 1011 closer to the area of the middle-row first touch electrode block 1011.

[0049] Similarly, in each touch area T, the areas of the first-column second touch electrode block 1021 and the last-column second touch electrode block 1021 are both greater than half of the area of the middle-column second touch electrode block 1021. The areas of the first-column second touch electrode block 1021 and the last-column second touch electrode block 1021 in each touch area T of the touch display substrate are significantly increased, making the areas of the first-column second touch electrode block 1021 and the last-column second touch electrode block 1021 closer to the area of the middle-column second touch electrode block 1021.

[0050] Figure 3 and Figure 4 The first-row first touch electrode block 1011 and the last-row first touch electrode block 1011 in the touch display substrate shown can be regarded as Figure 1 and Figure 2 formed by moving the complete diamond-shaped first touch electrode block 1011 of the touch display substrate shown towards the edge, and the part exceeding the edge is cut off, so that the areas of the first-row first touch electrode block 1011 and the last-row first touch electrode block 1011 can be increased.

[0051] Figure 3 and Figure 4 The first-column second touch electrode block 1021 and the last-column second touch electrode block 1021 in the touch display substrate shown in Figure 1 and Figure 2 After the first touch electrode block 1011 in the touch display substrate shown in moves towards the edge, a part of the area is left, and this part of the area is supplemented by the second touch electrode block 1021, and a part of the first touch electrode block 1011 is cut off to leave a part of the area, and this part of the area is also supplemented by the second touch electrode block 1021, so that the area of the first-column second touch electrode block 1021 and the last-column second touch electrode block 1021 can be increased.

[0052] Figure 5 and Figure 6 The first touch electrode block 1011 and the second touch electrode block 1021 in the touch display substrate shown in Figure 1 and Figure 2 The positions of the first touch electrode block 1011 and the second touch electrode block 1021 in the touch display substrate shown in are interchanged to increase the area of the first-row first touch electrode block 1011 and the last-row first touch electrode block 1011, as well as the area of the first-column second touch electrode block 1021 and the last-column second touch electrode block 1021.

[0053] In the touch display substrate provided by the embodiments of the present disclosure, in each touch area T, the areas of the first-row first touch electrode block 1011 and the last-row first touch electrode block 1011 are both greater than half of the area of the middle-row first touch electrode block 1011, and the areas of the first-column second touch electrode block 1021 and the last-column second touch electrode block 1021 are both greater than half of the area of the middle-column second touch electrode block 1021. In this way, the area of the first-row first touch electrode block 1011 and the last-row first touch electrode block 1011, as well as the area of the first-column second touch electrode block 1021 and the last-column second touch electrode block 1021 can be increased, so that the areas of the first-row first touch electrode block 1011 and the last-row first touch electrode block 1011 are closer to the area of the middle-row first touch electrode block 1011, and the areas of the first-column second touch electrode block 1021 and the last-column second touch electrode block 1021 are closer to the area of the middle-column second touch electrode block 1021, ensuring that the touch signals at each position in the touch area T are basically the same. Therefore, the uniformity of the touch signals can be improved (especially in the scenario of using a stylus for touch), thereby improving the touch accuracy of the touch display substrate, and further meeting the user's requirements for high touch accuracy.

[0054] In some embodiments, such as Figures 3 to 6As shown, the first touch electrode block 1011 in the first row and the first touch electrode block 1011 in the last row both have a first edge L1 that is away from the first touch electrode block 1011 in the middle row and parallel to the row direction; the length of the first edge L1 is at least one-third of the maximum length Lmax1 of the first touch electrode block 1011 in the row direction; the second touch electrode block 1021 in the first column and the second touch electrode block 1021 in the last column both have a second edge L2 that is away from the second touch electrode block 1021 in the middle column and parallel to the column direction; the length of the second edge L2 is at least one-third of the maximum length Lmax2 of the second touch electrode block 1021 in the column direction.

[0055] In Figure 3 and Figure 4 In the touch display substrate shown, the first touch electrode block 1011 in the first row and the first touch electrode block 1011 in the last row are irregular polygons. The first edge L1 can be regarded as formed by cutting off part of the corners of a rhombus. The maximum length Lmax1 of the first touch electrode block 1011 in the row direction can be the length of the line connecting two vertices in the row direction. The length of the first edge L1 is at least one-third of the maximum length Lmax1 of the first touch electrode block 1011 in the row direction, which can increase the area of the first touch electrode block 1011 in the first row and the first touch electrode block 1011 in the last row.

[0056] In Figure 3 and Figure 4 In the touch display substrate shown, the second touch electrode block 1021 in the first column and the second touch electrode block 1021 in the last column are irregular polygons. The second edge L2 can be regarded as formed by filling the second touch electrode block 1021 at the position where part of the first touch electrode block 1011 is removed. The maximum length Lmax2 of the second touch electrode block 1021 in the column direction can be the length of the line connecting two vertices in the column direction. The length of the second edge L2 is at least one-third of the maximum length Lmax2 of the second touch electrode block 1021 in the column direction, which can increase the area of the second touch electrode block 1021 in the first column and the second touch electrode block 1021 in the last column.

[0057] Figure 5 and Figure 6 In the touch display substrate shown, the first touch electrode block 1011 in the first row and the first touch electrode block 1011 in the last row are triangles, and the second touch electrode block 1021 in the first column and the second touch electrode block 1021 in the last column are triangles. The principle is similar to the above and will not be elaborated here.

[0058] In some embodiments, such as Figures 3 to 6As shown, at least a part of the first touch electrode blocks 1011 in the middle row are provided with a first hollow structure, and at least a part of the second touch electrode blocks 1021 in the middle column are provided with a second hollow structure.

[0059] At least a part of the first touch electrode blocks 1011 in the middle row are provided with a first hollow structure, and at least a part of the second touch electrode blocks 1021 in the middle column are provided with a second hollow structure. Due to the existence of the first hollow structure and the second hollow structure, the areas of the first touch electrode blocks 1011 in the middle row and the second touch electrode blocks 1021 in the middle column can be reduced, making the areas of the first touch electrode blocks 1011 in the first row and the last row closer to the area of the first touch electrode blocks 1011 in the middle row, and the areas of the second touch electrode blocks 1021 in the first column and the last column closer to the area of the second touch electrode blocks 1021 in the middle column, ensuring that the touch signals at various positions in the touch area T are basically the same. Therefore, the uniformity of the touch signals can be improved (especially in the scenario of using a stylus for touch), thereby improving the touch accuracy of the touch display substrate and meeting the user's requirements for high touch accuracy.

[0060] It should be noted here that, according to the differences in the touch signals generated at different positions in the touch area T in actual applications, the number of the first hollow structure and the second hollow structure can be set to ensure that the touch signals at various positions in the touch area T are basically the same while avoiding affecting the normal touch function.

[0061] In addition, the existence of the first hollow structure can reduce the parasitic capacitance between the first touch electrode blocks 1011 and other conductive layers (except the second touch electrode blocks 1021), and the existence of the second hollow structure can reduce the parasitic capacitance between the second touch electrode blocks 1021 and other conductive layers (except the first touch electrode blocks 1011). Therefore, the influence of the parasitic capacitance on the touch signals can be reduced, thus ensuring the stability of the touch signals.

[0062] In some embodiments, as Figures 3 to 6 shown, the touch display substrate further includes: a plurality of first floating electrode blocks 103 and a plurality of second floating electrode blocks 104; the first floating electrode blocks 103 are embedded in the first hollow structure and are disconnected from the first touch electrode blocks 1011; the second floating electrode blocks 104 are embedded in the second hollow structure and are disconnected from the second touch electrode blocks 1021.

[0063] The first floating electrode block 103 is disconnected from the first touch electrode block 1011, and it will not input a touch signal and is in a suspended state. The second floating electrode block 104 is disconnected from the second touch electrode block 1021, and it will also not input a touch signal and is in a suspended state. The first floating electrode block 103 can occupy the areas of the first touch electrode block 1011 in the first row and the first touch electrode block 1011 in the last row. The second floating electrode block 104 can occupy the areas of the second touch electrode block 1021 in the first column and the second touch electrode block 1021 in the last column, making the areas of the first touch electrode block 1011 in the first row and the first touch electrode block 1011 in the last row closer to the area of the first touch electrode block 1011 in the middle row, and the areas of the second touch electrode block 1021 in the first column and the second touch electrode block 1021 in the last column closer to the area of the second touch electrode block 1021 in the middle column, ensuring that the touch signals at various positions in the touch area T are basically the same. Therefore, the uniformity of the touch signal can be improved (especially in the scenario of using a stylus for touch), thereby improving the touch accuracy of the touch display substrate and meeting the user's requirements for high touch accuracy.

[0064] In addition, the first floating electrode block 103 can fill the first hollow structure in the first touch electrode block 1011, and the second floating electrode block 104 can fill the second hollow structure in the second touch electrode block 1021, ensuring that the surfaces of the film layers where the first touch electrode block 1011 and the second touch electrode block 1021 are located are basically flat, thereby improving the adhesion between the film layers where the first touch electrode block 1011 and the second touch electrode block 1021 are located and other film layers and avoiding peeling phenomena.

[0065] Figure 7 For Figure 5 the partial enlarged structural schematic diagram of the A area of the touch display substrate shown, Figure 8 For Figure 7 the cross-sectional structural schematic diagram of the touch display substrate along the I-I' direction shown, as Figure 7 and Figure 8 shown, the touch display substrate further includes: a connecting portion (not shown in the figure) and a bridging portion 105; an insulating layer is provided between the connecting portion and the bridging portion 105; adjacent first touch electrode blocks 1011 in the same row are connected by the connecting portion; adjacent second touch electrode blocks 1021 in the same column are connected to the bridging portion 105 through vias penetrating the insulating layer; the connecting portion and the first touch electrode block 1011, the second touch electrode block 1021, the first floating electrode block 103, and the second floating electrode block 104 are arranged in the same layer.

[0066] The adjacent first touch electrode blocks 1011 in the same row are connected together through a connection part, so as to form a touch channel in the row direction. The adjacent second touch electrode blocks 1021 in the same column are connected to the bridging part 105 through vias penetrating the insulating layer, so as to form a touch channel in the column direction. An insulating layer is arranged between the connection part and the bridging part 105, which can avoid the interference between the touch signals in the row direction and the touch signals in the column direction, and ensure the stability of the touch signals.

[0067] The connection part, the first touch electrode block 1011, the second touch electrode block 1021, the first floating electrode block 103, and the second floating electrode block 104 are arranged in the same layer, and the same material can be used and they can be formed by the same process, so as to reduce the process difficulty and save the preparation cost.

[0068] It can be understood that the connection part is arranged in the same layer as the first touch electrode block 1011, and the adjacent first touch electrode blocks 1011 in the same row can be directly connected. The part where they are connected and cross with the bridging part 105 is the connection part. Therefore, it is not clearly marked in Figure 7 and Figure 8 . At the same time, in Figures 3 to 6 , since the shown range is large, the areas of the connection part and the bridging part 105 therein are small, and the connection part and the bridging part 105 therein are omitted.

[0069] In some embodiments, as Figure 7 shown, the touch display substrate further has a plurality of pixel regions provided in each touch region T; the touch display substrate further includes: pixel units P provided in the pixel regions; the pixel units P are located on the side close to the substrate 100 of the film layer where the first touch electrode block 1011 and the second touch electrode block 1021 are located.

[0070] The pixel unit P may include: a pixel driving circuit and a light-emitting device. The pixel driving circuit may be a 4T2C (i.e., 4 transistors and 2 capacitors) structure, a 3T1C (i.e., 3 transistors and 1 capacitor) structure, a 7T1C (i.e., 7 transistors and 1 capacitor) structure, a 5T1C (i.e., 5 transistors and 1 capacitor) structure, an 8T1C (i.e., 8 transistors and 1 capacitor) structure, an 8T2C (i.e., 8 transistors and 2 capacitors) structure, etc. The light-emitting device may be a light-emitting diode (LED), an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), a mini light-emitting diode (Mini LED), a micro light-emitting diode (Micro LED), etc., which will not be limited herein.

[0071] The pixel unit P may be independently disposed on the display substrate, and structures such as the first touch electrode block 1011 and the second touch electrode block 1021 may be independently disposed on the touch substrate. The two together form a touch display substrate. Among them, the display substrate formed by the pixel unit P is located on the side of the touch substrate formed by structures such as the first touch electrode block 1011 and the second touch electrode block 1021 close to the substrate 100, and may form an on-cell touch panel. It can be understood that the touch display substrate provided by the embodiments of the present disclosure may also be of other types, such as an add-on mode touch panel and an in-cell touch panel, etc.

[0072] In some embodiments, as Figure 7 shown, the first touch electrode block 1011 includes: a first grid line 1011a; the second touch electrode block 1021 includes: a second grid line 1021a; the orthographic projections of the first grid line 1011a and the second grid line 1021a on the substrate 100 both fall between the orthographic projections of adjacent pixel units P on the substrate 100.

[0073] The first touch electrode block 1011 can be formed by the first grid lines 1011a, and the second touch electrode block 1021 can be formed by the second grid lines 1021a. Both the first grid lines 1011a and the second grid lines 1021a are disposed between adjacent pixel units P, which can avoid the first grid lines 1011a and the second grid lines 1021a from blocking light and affecting the light emission effect of the pixel units P, thereby improving the display effect.

[0074] It can be understood that the first grid lines 1011a and the second grid lines 1021a can be formed of the same material and by the same process, and are disconnected at corresponding positions to form the first touch electrode blocks 1011 arranged in the row direction and the second touch electrode blocks 1021 arranged in the column direction. For other touch electrodes in the touch display substrate, such as the first floating electrode block 103 and the second floating electrode block 104, the above-mentioned grid line form can also be adopted, and no detailed description will be given here.

[0075] Figure 9 For Figure 3 the enlarged schematic diagram of the partial structure of the B area of the touch display substrate shown, as Figure 9 shown, the touch display substrate further has an opening area H surrounded by the pixel area and a transition area M located between the opening area H and the pixel area; both the first grid lines 1011a and the second grid lines 1021a extend to the transition area M; the arrangement density of the first grid lines 1011a in the transition area M is greater than that in the touch area T; the arrangement density of the second grid lines 1021a in the transition area M is greater than that in the touch area T.

[0076] The arrangement density of the first grid lines 1011a in the transition area M is greater than that in the touch area T, and the arrangement density of the second grid lines 1021a in the transition area M is greater than that in the touch area T. This can increase the area of the touch electrodes in the transition area M to compensate for the touch electrode area lost to avoid the opening area H, and improve the intensity of the touch signals in the transition area M, thereby ensuring the uniformity of the touch signals in different areas of the touch display substrate.

[0077] In some embodiments, as Figure 9 shown, the line width of the first grid lines 1011a in the transition area M is greater than that in the touch area T; the line width of the second grid lines 1021a in the transition area is greater than that in the touch area T.

[0078] The line width of the first grid line 1011a in the transition region M is greater than that in the touch region T; the line width of the second grid line 1021a in the transition region is greater than that in the touch region T, which can further increase the area of the touch electrodes in the transition region M to compensate for the loss of the touch electrode area due to avoiding the opening region H, improve the intensity of the touch signals in the transition region M, and thus ensure the uniformity of the touch signals in different regions of the touch display substrate. In practical applications, the line widths of the first grid line 1011a and the second grid line 1021a can specifically be 4 microns to 50 microns.

[0079] In a second aspect, embodiments of the present disclosure provide a touch display device, which includes the touch display substrate provided in any of the above embodiments. The touch display device can be, for example, any product with a display function such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a vehicle-mounted device, etc. Other essential components of the display device are understood by those of ordinary skill in the art and will not be elaborated here, nor should they be regarded as a limitation to the present disclosure.

[0080] It should be noted that in the drawings, the dimensions of layers and regions may be exaggerated for clarity of illustration. Also, it can be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be an intermediate layer. Additionally, it can be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element, or there may be more than one intermediate layer or element. Further, it can be understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0081] In several embodiments provided by the embodiments of the present disclosure, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the positions of the components shown are only for a logical function position, and there can be other position arrangements in actual implementation.

[0082] It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principles of the present disclosure. However, the present disclosure is not limited thereto. Those of ordinary skill in the art can make various modifications and improvements without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also considered within the protection scope of the present disclosure.

Claims

1. A touch display substrate having a plurality of touch regions arranged in an array, characterized in that, The touch display substrate includes: a substrate substrate, a plurality of first touch electrodes arranged in multiple rows and a plurality of second touch electrodes arranged in multiple columns disposed on each of the touch areas on the substrate substrate; the first touch electrodes include: a plurality of first touch electrode blocks arranged in a row direction and electrically connected; the second touch electrodes include: a plurality of second touch electrode blocks arranged in a column direction and electrically connected; In each of the touch areas, the areas of the first row of the first touch electrode blocks and the last row of the first touch electrode blocks are both greater than half of the area of the first touch electrode blocks in the middle rows, and the areas of the first column of the second touch electrode blocks and the last column of the second touch electrode blocks are both greater than half of the area of the second touch electrode blocks in the middle columns.

2. The touch display substrate according to claim 1, wherein The first row of the first touch electrode blocks and the last row of the first touch electrode blocks both have a first edge away from the first touch electrode blocks in the middle rows and parallel to the row direction; the length of the first edge is at least one-third of the maximum length of the first touch electrode block in the row direction; The first column of the second touch electrode blocks and the last column of the second touch electrode blocks both have a second edge away from the second touch electrode blocks in the middle columns and parallel to the column direction; the length of the second edge is at least one-third of the maximum length of the second touch electrode in the column direction.

3. The touch display substrate according to claim 1, wherein At least some of the first touch electrode blocks in the middle rows are provided with a first hollow structure, and at least some of the second touch electrode blocks in the middle columns are provided with a second hollow structure.

4. The touch display substrate according to claim 3, wherein, The touch display substrate further includes: a plurality of first floating electrode blocks and a plurality of second floating electrode blocks; The first floating electrode blocks are embedded in the first hollow structure and are disconnected from the first touch electrode blocks; The second floating electrode blocks are embedded in the second hollow structure and are disconnected from the second touch electrode blocks.

5. The touch display substrate according to claim 4, wherein The touch display substrate further includes: a connection portion and a bridging portion; an insulating layer is provided between the connection portion and the bridging portion; Adjacent first touch electrode blocks in the same row are connected through the connection portion; Adjacent second touch electrode blocks in the same column are connected to the bridging portion through vias penetrating the insulating layer; The connection portion and the first touch electrode blocks, the second touch electrode blocks, the first floating electrode blocks, and the second floating electrode blocks are arranged in the same layer.

6. The touch display substrate according to claim 1, wherein The touch display substrate further has a plurality of pixel areas provided in each of the touch areas; the touch display substrate further includes: pixel units provided in the pixel areas; The pixel units are located on the side of the film layer where the first touch electrode blocks and the second touch electrode blocks are located, closer to the substrate substrate.

7. The touch display substrate according to claim 6, wherein, The first touch electrode blocks include: first grid lines; the second touch electrode blocks include: second grid lines; The orthographic projections of the first grid lines and the second grid lines on the substrate substrate both fall between the orthographic projections of adjacent pixel units on the substrate substrate.

8. The touch display substrate according to claim 7, wherein The touch display substrate further has an opening area surrounded by the pixel areas and a transition area located between the opening area and the pixel areas; the first grid lines and the second grid lines both extend to the transition area; The arrangement density of the first grid lines in the transition region is greater than that in the touch region; The arrangement density of the second grid lines in the transition region is greater than that in the touch region.

9. The touch display substrate according to claim 8, wherein The line width of the first grid lines in the transition region is greater than that in the touch region; The line width of the second grid lines in the transition region is greater than that in the touch region.

10. A touch display device, characterized in that, The touch display device includes the touch display substrate according to any one of claims 1 to 9.

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