Touch substrate, touch display module and assembling method of touch display module

Abstract

The invention provides a touch substrate, a touch display module and an assembling method of the touch display module. The touch substrate comprises a base material which comprises a first side and a second side which are oppositely arranged; the at least one touch control structure comprises a first touch control electrode which is positioned on the first side; and the plurality of touch terminals comprise first touch terminals, the first touch terminals are arranged on the second side, and the first touch terminals are electrically connected with the first touch electrodes. The first touch terminals and the first touch electrodes are located on the different side faces of the base material, and therefore electrical connection of the second side can be unified to the first side through the first touch terminals located on the second side, and feasibility of the bonding technology is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a touch display module and an assembly method of the touch display module. Background Art

[0002] In the current design of the touch panel (TP) of the flexible screen, there are mainly array processes and external processes. Among them, the array process involves directly manufacturing TP on the surface of the thin film encapsulation (TFE), which usually requires the preparation of 5 layers, namely the buffer layer, metal layer, inorganic layer, metal layer, and organic insulator layer (OC). In addition, each layer must be exposed and developed, the process is very long and the cost is also high. The external TP contains 3 layers, namely the metal layer, metal layer, and OC layer. The process is relatively simple, but the external TP increases the thickness and module process. Summary of the invention

[0003] In view of this, the embodiments of the present application provide a touch display module and a method for assembling the touch display module, which solve the problems in the prior art.

[0004] In a first aspect, an embodiment of the present application provides a touch substrate, comprising: a substrate, comprising a first side and a second side arranged opposite to each other; at least one touch structure, the touch structure comprising a first touch electrode, located on the first side; a plurality of touch terminals, including a first touch terminal, the first touch terminal being arranged on the second side, and the first touch terminal and the first touch electrode being electrically connected.

[0005] In combination with the first aspect, in some implementations of the first aspect, the first touch terminal includes a first conductive portion, the first conductive portion is located on the second side and is electrically connected to the first touch electrode; the touch substrate has a first via hole, and the first via hole penetrates the substrate and the first conductive portion; preferably, the touch substrate also includes a conductive portion, and the conductive portion fills the first via hole; preferably, the material of the conductive portion includes silver.

[0006] In combination with the first aspect, in some implementations of the first aspect, the touch control structure further includes a second touch control electrode, and an orthographic projection of the second touch control electrode on the substrate intersects with an orthographic projection of the first touch control electrode on the substrate.

[0007] In combination with the first aspect, in certain implementations of the first aspect, the second touch electrode is located on the second side; the multiple touch terminals also include a second touch terminal, the second touch terminal is electrically connected to the second touch electrode, and the second touch terminal is arranged on the second side; preferably, the second touch terminal includes a touch pad, and the touch pad is located on the second side; preferably, the touch substrate also includes a first protective film and a second protective film, the first protective film is located on the side of the first touch electrode away from the substrate, and the second protective film is located on the side of the second touch electrode away from the substrate.

[0008] In combination with the first aspect, in some implementations of the first aspect, the second touch electrode is located on the first side; the multiple touch terminals also include a second touch terminal, the second touch terminal is electrically connected to the second touch electrode, and the second touch terminal is arranged on the second side; preferably, the second touch terminal includes a second conductive portion, the second conductive portion is located on the first side and is electrically connected to the second touch electrode; the touch substrate has a second via hole, and the second via hole penetrates the substrate and the second conductive portion; preferably, the touch substrate also includes a conductive portion, and the conductive portion fills the second via hole; preferably, the material of the conductive portion includes silver; preferably, the first touch electrode includes a plurality of main body portions and a bridging portion connecting adjacent main body portions; the touch substrate also includes an insulating layer, the main body portion and the second touch electrode are located between the substrate and the insulating layer, and the bridging portion is located on the side of the insulating layer away from the substrate, or, the bridging portion is located between the substrate and the insulating layer, and the main body portion and the second touch electrode are located on the side of the insulating layer away from the substrate.

[0009] In the second aspect, an embodiment of the present application provides a touch display module, including: a touch panel, including a substrate, a first touch electrode, a second touch electrode and a plurality of touch terminals; the substrate includes a first side and a second side arranged opposite to each other, the first touch electrode is located on the first side, and the second touch electrode is located on the first side or the second side; the plurality of touch terminals include a first touch terminal and a second touch terminal, the first touch terminal is electrically connected to the first touch electrode, the second touch terminal is electrically connected to the second touch electrode, and the first touch terminal and the second touch terminal are both arranged on the second side; a display panel, located on the first side of the substrate, the display panel includes display terminals; a touch circuit board, bonded to the first touch terminal and the second touch terminal; and a display circuit board, bonded to the display terminals.

[0010] In the third aspect, an embodiment of the present application provides a touch display module, a touch panel, including a substrate, a first touch electrode, a second touch electrode and a plurality of touch terminals; the substrate includes a first side and a second side arranged opposite to each other, the first touch electrode is located on the first side, and the second touch electrode is located on the first side or the second side; the plurality of touch terminals include a first touch terminal and a second touch terminal, the first touch terminal is electrically connected to the first touch electrode, the second touch terminal is electrically connected to the second touch electrode, and the first touch terminal and the second touch terminal are both arranged on the second side; a display panel is located on the second side of the substrate, the display panel includes a display terminal and a plurality of touch adapter terminals, the touch adapter terminals are electrically connected to some of the display terminals, and the plurality of touch adapter terminals are electrically connected to the first touch terminal and the second touch terminal respectively; and a touch display circuit board is bonded to the display terminals.

[0011] In a fourth aspect, an embodiment of the present application provides a method for assembling a touch display module, comprising: bonding the touch substrate and the display substrate described in the first aspect to obtain a large touch display panel, the touch substrate comprising a plurality of touch structures, the display substrate comprising a plurality of display panels, the display panels and the touch structures corresponding one to one; cutting the large touch display panel into a plurality of touch display panels, the touch display panels comprising correspondingly bonded display panels and touch panels, the touch panels comprising touch structures.

[0012] In combination with the fourth aspect, in certain implementations of the first aspect, the display substrate is located on the first side of the substrate, the display panel includes display terminals, and the assembly method further includes: bonding the touch circuit board and the touch structure; bonding the display circuit board and the display panel; or, the display substrate is located on the second side of the substrate, the display panel includes display terminals and multiple touch adapter terminals, and the touch adapter terminals are electrically connected to some display terminals; the assembly method further includes: electrically connecting the multiple touch adapter terminals to the first touch terminal and the second touch terminal; bonding the display terminals to the touch display circuit board.

[0013] In a fifth aspect, an embodiment of the present application provides a touch display device, including the touch substrate described in the first aspect, or the touch display module described in the second aspect, or an assembly method of the touch display module described in the third or fourth aspect.

[0014] In the present application, each first touch electrode has a matching first touch terminal for easy connection. In addition, the first touch terminal and the first touch electrode are located on different sides of the substrate, so that the electrical connection of the second side can be unified to the first side through the first touch terminal located on the second side, ensuring the feasibility of the bonding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a cross-sectional structural diagram of an existing flexible screen provided in one embodiment of the present application.

[0016] Figure 2 FIG. 1 is a schematic structural diagram of a touch control substrate provided in an embodiment of the present application.

[0017] Figure 3 FIG. 1 is a schematic structural diagram of a touch control substrate provided in another embodiment of the present application.

[0018] Figure 4 FIG. 1 is a schematic structural diagram of a touch control substrate provided in yet another embodiment of the present application.

[0019] Figure 5 FIG. 1 is a flow chart of a method for assembling a touch display module according to an embodiment of the present application.

[0020] Figure 6 FIG. 1 is a schematic diagram showing the layout of touch transfer terminals in a display panel provided in an embodiment of the present application.

[0021] Figure 7 FIG. 1 is an appearance diagram of a touch transfer terminal provided in an embodiment of the present application.

[0022] Figure 8 FIG. 1 is an appearance diagram of a touch terminal provided in an embodiment of the present application.

[0023] Fig. 9 FIG. 1 is a schematic diagram of punching a hole on a touch terminal of a TP according to an embodiment of the present application.

[0024] Fig.10 FIG. 1 is a schematic diagram of punching a hole on a touch transfer terminal of a display panel provided in an embodiment of the present application.

[0025] Fig.11 A schematic diagram of the structure of a touch display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] Figure 1 The cross-sectional structure diagram of an existing flexible screen provided in one embodiment of the present application is shown, which specifically includes a flexible screen body 110 , a support film 120 , a polarizer 130 , a drive chip 140 , a Drive FPC 150 , a TP 160 , and a TP FPC 170 .

[0028] exist Figure 1In the TP design shown in the figure, on-cell technology embeds the TP function between the color filter substrate and the polarizer. This design involves a complex array process, which usually requires five layers of different materials to be prepared in sequence on the display panel. The first is the buffer layer, which provides basic flattening and buffering for the entire structure. It is usually made of inorganic materials and processed by dry etching. Next are two metal layers, which are key components of TP and are responsible for detecting and transmitting touch signals. When indium tin oxide (ITO) is used as a conductive material, the metal layer needs to be processed by wet etching. The inorganic layer is used for isolation or other functions and also needs to be accurately processed by dry etching. Finally, the OC layer provides final protection for the touch substrate and is usually formed by exposure and development processes. Throughout the array process, wet etching and dry etching equipment need to be used alternately to ensure accurate processing of each layer of material and good electrical properties.

[0029] External TP usually uses double-sides ITO (DITO) material, cyclic olefin polymer (COP) material as the middle layer, and the upper and lower copper (CU) / ITO layers are etched by wet etching process to form circuit lines. In order to protect TP, a layer of optical pressure sensitive adhesive (PSA) is also attached to the top layer. Although this design reduces the number of layers and the corresponding exposure and development steps, and simplifies the process flow, the external TP increases the thickness and module process.

[0030] Based on the above, the present application provides a touch substrate, a touch display module, and a touch display module assembly method. First, Figure 2 FIG. 1 is a schematic diagram of the structure of a touch control substrate provided by an embodiment of the present application. Figure 2 As shown, the touch substrate includes: a substrate 10, including a first side and a second side arranged opposite to each other; at least one touch structure 20, the touch structure 20 includes a first touch electrode 21, and is located on the first side; a plurality of touch terminals (not shown in the figure), including a first touch terminal (not shown in the figure), the first touch terminal corresponds to the first touch electrode 21 one by one, and is electrically connected to the first touch electrode 21; the first touch terminal is located on the second side, and the orthographic projection of the first touch terminal on the substrate 10 overlaps with the orthographic projection of the first touch electrode 21 on the substrate 10.

[0031] Specifically, the touch structure 20 enables the substrate 10 to detect and respond to touch inputs. The first touch electrode 21 is a component of the touch structure 20 and is a key component for realizing the touch detection function. Exemplarily, the first touch electrode 21 is a conductive layer made of a transparent conductive material (such as ITO). Each first touch electrode 21 has a matching first touch terminal to facilitate electrical connection between the two. In addition, the first touch terminal and the first touch electrode 21 are located on different sides of the substrate 10. Therefore, the electrical connection of the second side can be unified to the first side through the first touch terminal located on the second side, thereby ensuring the feasibility of the bonding process. In some embodiments, the bonding process can be performed as follows: Figure 2 The first via 30 at the position shown connects the first touch terminal on the second side to the first touch electrode 21. Furthermore, the orthographic projection of the first touch terminal on the substrate 10 overlaps with the orthographic projection of the first touch electrode 21 on the substrate 10. This design can achieve internal connection, for example, the first touch terminal and the first touch electrode 21 are electrically connected inside the substrate 10 through a conductive path or structure without the need to see the connection path outside. This design can save space.

[0032] In some embodiments of the present application, the first touch terminal includes a first conductive portion (not shown in the figure), which is located on the second side and electrically connected to the first touch electrode 21; the touch substrate has a first via hole 30, which passes through the substrate 10 and the first conductive portion.

[0033] Specifically, the first conductive portion is physically connected to the first touch electrode 21 , thereby unifying the electrical connection of the second side to the first side.

[0034] In addition, the orthographic projection of the first conductive portion on the substrate 10 overlaps with the orthographic projection of the first touch terminal on the substrate 10. That is, on the vertical observation plane of the substrate 10, the positions of the first conductive portion and the first touch terminal overlap, which helps to optimize the spatial layout of the touch substrate, making the internal electrical connection more compact and efficient. In addition, in this way, more electrical connection points can be achieved without increasing the overall size of the touch substrate, thereby improving the functionality and flexibility of the touch substrate.

[0035] Optionally, the touch control substrate further comprises a conductive portion, and the conductive portion fills the first via hole. In this way, it is possible to ensure that the first via hole has good conductivity, so that current can be transmitted between different layers, thereby improving the overall performance and reliability of the touch control substrate. Optionally, the material of the conductive portion comprises silver.

[0036] refer to Figure 2As shown, in some embodiments of the present application, the touch structure 20 further includes a second touch electrode 22 , and the orthographic projection of the second touch electrode 22 on the substrate 10 intersects with the orthographic projection of the first touch electrode 21 on the substrate 10 .

[0037] In this embodiment, from the vertical direction of the substrate 10, the orthographic projections of the first touch electrode 21 and the second touch electrode 22 form a cross pattern on the plane, which can improve the measurement accuracy of the touch position and detect more subtle touch actions. For example, in multi-touch applications, the design of the cross electrodes can allow the substrate 10 to simultaneously identify and respond to multiple touch points, thereby providing a richer and more sensitive interactive experience. In addition, this design can also be used to implement specific touch detection modes, such as pressure sensing or gesture recognition. In this way, the touch substrate can be more flexibly adapted to various application requirements, improving its practicality and compatibility in electronic devices.

[0038] refer to Figure 2 As shown, in some embodiments of the present application, the second touch electrode 22 is located on the second side; the plurality of touch terminals further include a second touch terminal, the second touch terminal is electrically connected to the second touch electrode 22, and the second touch terminal is located on the second side.

[0039] In this embodiment, the second touch electrodes 22 and the first touch electrodes 21 are distributed on both sides of the substrate 10, which can achieve more complex touch detection and more flexible electrode configuration. In addition, the second touch terminals electrically connected to the second touch electrodes 22 are also located on the second side of the substrate 10. This design allows bonding operations to be performed on the same side, reduces the complexity of the bonding process, and reduces connection errors caused by alignment problems on different sides, thereby improving the reliability of the touch substrate.

[0040] In summary, in this embodiment, the touch substrate has a first touch electrode 21 on the first side, and has a second touch electrode 22, a first conductive portion, a first touch terminal, and a second touch terminal on the second side, so that the second touch terminal is electrically connected to the second touch electrode 22 (bonding on the same side), and the first touch terminal is electrically connected to the first touch electrode 21 through the first conductive portion (bonding on different sides).

[0041] This design provides greater flexibility and ensures the reliability of electrical connections, especially when multiple layers need to be spanned or complex wiring is required. In addition, since bonding can be performed on both sides of the touch substrate, more functions can be implemented in a limited space.

[0042] Further, in some embodiments, the second touch terminal includes a touch pad (not shown in the figure) located on the second side. The touch pad provides a connection point so that a component (such as a chip or a connector) on the circuit board can be connected to the second touch terminal through touch welding.

[0043] Figure 3 FIG. 2 is a schematic diagram of the structure of a touch control substrate provided by another embodiment of the present application. Figure 3 As shown, in some embodiments of the present application, the touch substrate further includes a first protective film 41 and a second protective film 42 . The first protective film 41 is located on the side of the first touch electrode 21 away from the substrate 10 , and the second protective film 42 is located on the side of the second touch electrode 22 away from the substrate 10 .

[0044] This design not only provides greater design flexibility and connection diversity, but also further enhances the mechanical protection and chemical stability of the first touch electrode 21 and the second touch electrode 22 by adding the first protective film 41 and the second protective film 42 on the back of the first touch electrode 21 and the second touch electrode 22, thereby improving the durability and reliability of the entire touch substrate. In addition, the first protective film 41 and the second protective film 42 help prevent external environmental factors, such as humidity, temperature changes or physical impact, from damaging the electrodes. Therefore, the solution in this embodiment can also reduce the wear of the first touch electrode 21 and the second touch electrode 22 during production and use, ensuring that the touch substrate works stably for a long time.

[0045] For example, Figure 2 and Figure 3 The corresponding touch substrate is prepared using the DITO process.

[0046] In some embodiments of the present application, the second touch electrode is located on the first side; the plurality of touch terminals further include a second touch terminal, the second touch terminal is electrically connected to the second touch electrode 22, and the second touch terminal is located on the second side.

[0047] That is to say, in this embodiment, the second touch electrode 22 and the first touch electrode 21 are located on the same side (first side) of the substrate 10, and the first touch terminal and the second touch terminal are located on the second side of the substrate 10. The second touch terminal on the second side is electrically connected to the second touch electrode 22 on the first side, and the first touch terminal on the second side is electrically connected to the first touch electrode 21 on the first side, and this touch substrate realizes all different side bonding. This touch substrate design with all different side bonding significantly improves space utilization and design flexibility by realizing electrical connection between touch terminals and touch electrodes on different sides of the substrate, while simplifying wiring, reducing interference in signal transmission, and enhancing product durability and reliability.

[0048] Optionally, the second touch terminal includes a second conductive portion (not shown in the figure), the second conductive portion is located on the first side and is electrically connected to the second touch electrode. In other words, the second touch terminal on the second side is connected to the second touch electrode on the first side through the second conductive portion on the first side.

[0049] Figure 4 FIG. 2 is a schematic diagram of the structure of a touch control substrate provided by another embodiment of the present application. Figure 4 As shown, the touch substrate has a second via hole 30, and the second via hole 30 penetrates the substrate 10 and the second conductive portion. Therefore, the second touch terminal on the second side can pass through the second via hole 30, unify the electrical connection line to the first side, and then be electrically connected to the second touch electrode 22 on the first side through the second conductive portion on the first side.

[0050] Optionally, the touch control substrate in this embodiment further includes a conductive part, which fills the second via hole to ensure that the second via hole has good conductivity, so that current can be transmitted between different layers, thereby improving the overall performance and reliability of the touch control substrate. Optionally, the material of the conductive part includes silver.

[0051] Optionally, the first touch electrode 21 includes a plurality of main body portions and a bridge portion connecting adjacent main body portions, so that the touch electrode forms a continuous conductive path on the substrate 10 while maintaining electrical connection between the main body portions.

[0052] Optionally, the touch substrate further includes an insulating layer 50, which can be used to isolate the electrodes, prevent short circuits, and ensure the correct transmission of touch signals. Furthermore, the main body and the second touch electrode 22 are located between the substrate 10 and the insulating layer 50. This layout can protect the second touch electrode 22 from the external environment while maintaining the physical stability of the second touch electrode 22. The bridging portion is located on the side of the insulating layer 50 away from the substrate 10, which means that the bridging portion is outside the insulation 50, which is convenient for connection with other components. Alternatively, in other implementations, the bridging portion is located between the substrate 10 and the insulating layer 50, and the main body and the second touch electrode 22 are located on the side of the insulating layer 50 away from the substrate 10. This can optimize space utilization and signal transmission efficiency.

[0053] Optionally, the touch substrate further includes a protective layer (not shown), which is located on the side of the insulating layer 50 and the bridge portion away from the substrate 10. The protective layer can protect sensitive electronic components inside the touch substrate from physical damage, erosion by environmental factors (such as moisture, dust, etc.), and chemical corrosion.

[0054] In some embodiments, the present application provides a touch display module, including the following components:

[0055] A touch panel includes a substrate, a first touch electrode, a second touch electrode and a plurality of touch terminals; the substrate includes a first side and a second side arranged opposite to each other, the first touch electrode is located on the first side, and the second touch electrode is located on the first side or the second side; the plurality of touch terminals include a first touch terminal and a second touch terminal, the first touch terminal is electrically connected to the first touch electrode, the second touch terminal is electrically connected to the second touch electrode, and the first touch terminal and the second touch terminal are both arranged on the second side. A display panel is located on the first side of the substrate, and the display panel includes display terminals. A touch circuit board is bonded to the first touch terminal and the second touch terminal. And a display circuit board is bonded to the display terminals.

[0056] Specifically, the above touch panel is obtained based on the touch substrate in the aforementioned embodiment, which will not be elaborated in detail here.

[0057] In this embodiment, the touch circuit board is bonded to the touch terminals, and the display circuit board is bonded to the display terminals. This design allows the touch and display functions to be controlled by two independent circuit boards, providing modularity and flexibility, and facilitating maintenance and upgrades.

[0058] In some other embodiments, the present application provides a touch display module, including the following components:

[0059] A touch panel includes a substrate, a first touch electrode, a second touch electrode and a plurality of touch terminals; the substrate includes a first side and a second side arranged opposite to each other, the first touch electrode is located on the first side, and the second touch electrode is located on the first side or the second side; the plurality of touch terminals include a first touch terminal and a second touch terminal, the first touch terminal is electrically connected to the first touch electrode, the second touch terminal is electrically connected to the second touch electrode, and the first touch terminal and the second touch terminal are both arranged on the second side. A display panel is located on the second side of the substrate, the display panel includes a display terminal and a plurality of touch transfer terminals, the touch transfer terminals are electrically connected to some display terminals, and the plurality of touch transfer terminals are electrically connected to the first touch terminal and the second touch terminal respectively. And a touch display circuit board is bonded to the display terminal.

[0060] Likewise, the above touch panel is obtained based on the touch substrate in the aforementioned embodiment, which will not be elaborated in detail here.

[0061] In this embodiment, the touch display circuit board is bonded to the display terminal. This design realizes the integration of touch and display functions through an integrated chip, reduces the number of components, reduces costs, and may improve the response speed and performance of the module. In addition, the touch signal can be transmitted through the touch transfer terminal, which can realize communication between the touch and display circuit boards without directly connecting them, providing additional flexibility and design freedom.

[0062] The two structures of the touch display modules provided in the above two embodiments can adapt to different application requirements and manufacturing cost considerations. Specifically, the first structure is suitable for scenarios that require modularization and easy maintenance, while the second structure is suitable for scenarios that pursue cost-effectiveness and high-performance integration. Through the setting and connection of the touch transfer terminal, effective signal transmission and function integration can be achieved in the design of integrated and non-integrated touch display modules.

[0063] Figure 5 FIG. 1 is a flow chart of a method for assembling a touch display module according to an embodiment of the present application. Figure 5 As shown, the method includes the following steps.

[0064] Step S510 , bonding the touch control substrate and the display substrate to obtain a large touch control display panel.

[0065] Specifically, the touch control substrate is the touch control substrate of any of the above embodiments, the touch control substrate includes a plurality of touch control structures, the display substrate includes a plurality of display panels, and the display panels correspond to the touch control structures one by one.

[0066] The display panel includes a plurality of touch transfer terminals for connecting to touch terminals (including a first touch terminal and a second touch terminal) on the touch substrate. Figure 6 FIG. 1 is a schematic diagram showing the layout of touch transfer terminals in a display panel provided in an embodiment of the present application. Figure 7 FIG. 1 is an appearance diagram of a touch transfer terminal provided in an embodiment of the present application. Figure 8 FIG. 1 is an appearance diagram of a touch terminal provided in an embodiment of the present application.

[0067] Step S520: cutting the touch display panel into a plurality of touch display panels.

[0068] The touch display panel includes a display panel and a touch panel that are laminated to each other, and the touch panel includes a touch structure.

[0069] For example, a precision cutting device, such as a cutting machine or a laser cutting system, is used to segment the touch display panel along pre-set cutting lines. These cutting lines are usually determined based on the size of the touch substrate and the display substrate and the design requirements, ensuring that each cut touch display panel contains the corresponding display panel and touch panel, as well as the necessary touch structure and touch adapter terminals.

[0070] It should be noted that during the cutting process, accuracy must be maintained to avoid damage to the touch structure and display panel, while ensuring that the touch adapter terminals can be correctly connected to the touch terminals on the touch substrate. After cutting, each independent touch display panel has complete touch and display functions and can be used for subsequent assembly or directly integrated into the final product.

[0071] In this embodiment, by bonding the touch substrate and the display substrate to form a large touch display panel, operations can be performed on a larger panel, reducing the need to handle small components separately and improving production efficiency. At the same time, this bonding operation ensures the precise alignment between the display panel and the touch structure, providing a basis for subsequent touch functions. By cutting the bonded large panel into multiple independent touch display panels, the transition from the large panel to the final product size is achieved. In addition, the accuracy of the cutting process ensures the quality and consistency of each independent panel, ensuring the reliability of the touch and display functions.

[0072] In some embodiments, the display substrate is located on the first side of the substrate, and the display panel includes display terminals. The assembly method also includes: bonding the touch circuit board and the touch structure; bonding the display circuit board and the display panel.

[0073] This solution allows the touch and display functions to be physically and electrically integrated together to form a complete touch display module. In this way, it is possible to ensure that the touch circuit board and the display circuit board have a stable electrical connection with their respective panels, thereby achieving precise touch operation and high-quality display effects. This integrated design not only improves the overall performance of the module, but also helps to simplify the assembly process, reduce production costs, and improve product reliability and durability.

[0074] In some other embodiments, the display substrate is located on the second side of the substrate, the display panel includes a display terminal and a plurality of touch transfer terminals, and the touch transfer terminals are electrically connected to some of the display terminals. The assembly method also includes: electrically connecting the plurality of touch transfer terminals to the first touch terminal and the second touch terminal; and bonding the display terminal to the touch display circuit board.

[0075] The design allows direct electrical connection between the display panel and the touch function, and realizes the transmission of touch signals through the touch adapter terminal. In addition, the assembly method further includes electrically connecting these touch adapter terminals to the first touch terminal and the second touch terminal on the touch substrate, and bonding the display terminal to the touch display circuit board. This allows the touch and display circuits to be integrated on one circuit board, simplifies the structure of the module and reduces the number of components, which helps to reduce costs and improve production efficiency. At the same time, this integrated design also improves the reliability and stability of the module because it reduces the external connection points, thereby reducing the risk of failure.

[0076] In some embodiments of the present application, before laminating the touch substrate and the display substrate, the method further includes: using a laser process to drill a through hole on the touch terminal on the second side of the substrate.

[0077] Fig. 9FIG. 1 is a schematic diagram of punching a hole on a touch terminal of a TP according to an embodiment of the present application. Fig.10 Shown is a schematic diagram of punching holes on the touch adapter terminals of the display panel provided by an embodiment of the present application. Specifically, by punching through holes on the touch terminals (including the first touch terminal and the second touch terminal) on the second side of the TP substrate, a physical connection path can be created so that the conductive material can fill these through holes, thereby achieving electrical connection between the touch terminals and the touch adapter terminals. It should be noted that although the touch terminals and the touch adapter terminals are aligned in physical position, there is still a layer of substrate or other insulating material between them, and conduction needs to be achieved through through holes and conductive materials. The method in this embodiment reduces the complexity and cost of the assembly process, simplifies the production process, and improves the reliability of the product.

[0078] Specifically, the laser process can accurately create the required through holes on the substrate without damaging other parts of the substrate. And because it can achieve very small and precise apertures, it can ensure accurate alignment between the touch terminal and the touch transfer terminal and subsequent filling of conductive materials. In addition, the laser process has a high degree of automation and can quickly repeat the drilling operation on multiple touch terminals, thereby improving production efficiency and consistency. It can also easily adjust the aperture and position during the production process to adapt to different design requirements and increase the flexibility of the manufacturing process.

[0079] Furthermore, filling the through hole with a conductive material includes: coating the entire surface of the through hole with a conductive silver paste.

[0080] Specifically, the conductive silver paste has high conductivity and good filling ability, ensuring an effective electrical connection between the inside of the through hole and the touch terminal. Therefore, by coating the entire surface with conductive silver paste, it can be ensured that every part of the through hole is fully filled, thereby avoiding the problem of partial unfilled or unstable connection. In addition, since it is not necessary to perform precise filling operations on each through hole separately, production efficiency and consistency are improved.

[0081] In some embodiments of the present application, before laminating the touch substrate and the display substrate, the process further includes: attaching an adhesive layer on the surface of the touch substrate.

[0082] Exemplarily, the adhesive layer may be a conductive adhesive, an optically clear adhesive (OCA), a pressure sensitive adhesive (PSA) or other suitable adhesive materials, the selection of which depends on the required bonding strength, conductivity, transparency and other physical and chemical properties.

[0083] In this embodiment, the adhesive layer can ensure that the touch substrate and the display substrate can be firmly combined together after alignment to form a stable structure. In some embodiments, the adhesive layer not only provides mechanical adhesion, but also provides electrical connection, especially when a conductive adhesive is used. In addition, the adhesive layer can also fill the gaps caused by slight unevenness or thickness differences of the touch substrate or the display substrate, thereby ensuring the integrity and uniformity of the display and touch functions.

[0084] The present application also provides a touch display device, including the touch substrate of any of the above embodiments, or the touch display module of any of the above embodiments, or the touch display panel obtained by executing the assembly method of any of the above embodiments. Fig.11 FIG. 1 is a schematic diagram of the structure of a touch display device provided in one embodiment of the present application. Fig.11 As shown, the touch display device in this embodiment has a smaller frame than that in the prior art. The touch display device provided in this embodiment can be a mobile terminal, such as a mobile phone.

[0085] The touch display device provided in the embodiment of the present invention may also be a notebook, a tablet computer, a computer, a wearable device, etc., and this application does not make any specific restrictions on this.

[0086] It should be noted that in the drawings of the present application document, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0087] In addition, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0088] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A touch substrate, characterized in that: include: A substrate including a first side and a second side disposed opposite to each other; at least one touch structure, the touch structure comprising a first touch electrode located on the first side; The plurality of touch terminals include a first touch terminal, wherein the first touch terminal is disposed on the second side and is electrically connected to the first touch electrode.

2. The touch substrate according to claim 1, characterized in that: The first touch terminal includes a first conductive portion, the first conductive portion is located at the second side and is electrically connected to the first touch electrode; the touch substrate has a first via hole, the first via hole passes through the substrate and the first conductive portion; Preferably, it further comprises a conductive portion, wherein the conductive portion fills the first via hole; Preferably, the material of the conductive part includes silver.

3. The touch control substrate according to claim 1 or 2, characterized in that: The touch control structure further includes a second touch control electrode, and an orthographic projection of the second touch control electrode on the substrate intersects with an orthographic projection of the first touch control electrode on the substrate.

4. The touch control substrate according to claim 3, characterized in that: The second touch electrode is located at the second side; the plurality of touch terminals further include a second touch terminal, the second touch terminal is electrically connected to the second touch electrode, and the second touch terminal is located at the second side; Preferably, the second touch terminal comprises a touch pad, and the touch pad is located on the second side; Preferably, the touch control substrate further comprises a first protective film and a second protective film, wherein the first protective film is located on a side of the first touch control electrode away from the substrate, and the second protective film is located on a side of the second touch control electrode away from the substrate.

5. The touch substrate according to claim 3, characterized in that: The second touch electrode is located on the first side; the plurality of touch terminals further include a second touch terminal, the second touch terminal is electrically connected to the second touch electrode, and the second touch terminal is located on the second side; Preferably, the second touch terminal includes a second conductive portion, the second conductive portion is located at the first side and is electrically connected to the second touch electrode; the touch substrate has a second via hole, the second via hole passes through the substrate and the second conductive portion; Preferably, it further comprises a conductive portion, wherein the conductive portion fills the second via hole; Preferably, the material of the conductive part includes silver; Preferably, the first touch electrode comprises a plurality of main body parts and a bridge part connecting adjacent main body parts; the touch substrate further comprises an insulating layer; The main body and the second touch electrode are located between the substrate and the insulating layer, and the bridging portion is located on a side of the insulating layer away from the substrate; or, the bridging portion is located between the substrate and the insulating layer, and the main body and the second touch electrode are located on a side of the insulating layer away from the substrate.

6. A touch display module, characterized in that: include: A touch panel, comprising a substrate, a first touch electrode, a second touch electrode and a plurality of touch terminals; the substrate comprises a first side and a second side arranged opposite to each other, the first touch electrode is located on the first side, and the second touch electrode is located on the first side or the second side; the plurality of touch terminals comprises a first touch terminal and a second touch terminal, the first touch terminal is electrically connected to the first touch electrode, the second touch terminal is electrically connected to the second touch electrode, and the first touch terminal and the second touch terminal are both arranged on the second side; A display panel, located on the first side of the substrate, the display panel comprising display terminals; A touch circuit board, bonded to the first touch terminal and the second touch terminal; as well as A display circuit board is bonded and connected to the display terminals.

7. A touch display module, characterized in that: include: A touch panel, comprising a substrate, a first touch electrode, a second touch electrode and a plurality of touch terminals; the substrate comprises a first side and a second side arranged opposite to each other, the first touch electrode is located on the first side, and the second touch electrode is located on the first side or the second side; the plurality of touch terminals comprises a first touch terminal and a second touch terminal, the first touch terminal is electrically connected to the first touch electrode, the second touch terminal is electrically connected to the second touch electrode, and the first touch terminal and the second touch terminal are both arranged on the second side; a display panel located on the second side of the substrate, the display panel comprising display terminals and a plurality of touch transfer terminals, the touch transfer terminals being electrically connected to some of the display terminals, and the plurality of touch transfer terminals being electrically connected to the first touch terminals and the second touch terminals respectively; and A touch display circuit board is bonded and connected to the display terminals.

8. A method for assembling a touch display module, characterized in that: include: The touch control substrate and the display substrate as described in any one of claims 1 to 5 are bonded together to obtain a touch control display panel, wherein the touch control substrate comprises a plurality of the touch control structures, and the display substrate comprises a plurality of display panels, and the display panels correspond to the touch control structures one by one; The touch display panel is cut into a plurality of touch display panels, wherein the touch display panels include the display panel and the touch panel that are correspondingly bonded, and the touch panel includes the touch structure.

9. The assembly method according to claim 8, characterized in that: The display substrate is located on the first side of the substrate, and the display panel includes display terminals; the assembly method further includes: Bonding and connecting the touch control circuit board and the touch control structure; Bonding and connecting the display circuit board and the display panel; or, The display substrate is located on the second side of the substrate, the display panel includes a display terminal and a plurality of touch transfer terminals, and the touch transfer terminals are electrically connected to some of the display terminals; the assembly method further includes: Electrically connecting the plurality of touch transfer terminals to the first touch terminal and the second touch terminal; The display terminal and the touch display circuit board are bonded and connected.

10. A touch display device, characterized in that: It comprises the touch control substrate according to any one of claims 1 to 5, or the touch control display module according to claim 6 or 7, or the touch control display module obtained by executing the assembly method according to claim 8 or 9.

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