Touch display module and touch display device

Abstract

The present disclosure provides a touch display module and a touch display device, and belongs to the technical field of display. The touch display module comprises a touch panel and a flexible circuit board; the touch panel is connected with the flexible circuit board; the touch display module further comprises a first grounding circuit and a second grounding circuit; the touch panel comprises a plurality of driving signal lines and a plurality of sensing signal lines which are cross arranged; the flexible circuit board comprises a plurality of binding impedance test leads; the first grounding circuit at least partially surrounds the driving signal lines and the sensing signal lines; the second grounding circuit is formed by extending the first grounding circuit to the flexible circuit board, and the second grounding circuit is arranged adjacent to the binding impedance test leads and connected with the same grounding end.

Description

Technical Field

[0001] This disclosure belongs to the field of display technology, specifically relating to a touch display module and a touch display device. Background Technology

[0002] Consumer electronics products widely rely on touch panels to achieve their touch interaction functions, and touch display modules are widely used in smartphones, tablets, smart wearables, and other devices. As a crucial component of touch display modules, the electrostatic discharge (ESD) protection capability of the touch panel directly affects product reliability and user experience. Accordingly, customers impose stringent specifications on touch panels, including electrostatic discharge (ESD) protection performance.

[0003] Electrostatic discharge (ESD) is a significant factor leading to malfunctions and even failures in electronic products. During the production, assembly, and use of display modules, static charge can accumulate through various means, such as human contact and equipment friction. Once ESD occurs, high-voltage static electricity can damage the drive and sensing signal lines inside the touch panel, causing touch functionality failure or even permanent damage. Therefore, it is crucial to incorporate an effective ESD protection structure into the touch panel. Summary of the Invention

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

[0005] In a first aspect, embodiments of this disclosure provide a touch display module, the touch display module comprising: a touch panel and a flexible circuit board; the touch panel is connected to the flexible circuit board; the touch display module further comprises: a first grounding line and a second grounding line;

[0006] The touch panel includes: multiple driving signal lines and multiple sensing signal lines arranged in a cross pattern;

[0007] The flexible circuit board includes: multiple bonding impedance test leads;

[0008] The first grounding line at least partially surrounds the drive signal line and the sensing signal line;

[0009] The second grounding line is formed by extending the first grounding line to the flexible circuit board. The second grounding line is arranged adjacent to the binding impedance test lead and connected to the same grounding terminal.

[0010] In some embodiments, the touch display module further includes: a substrate and a display panel located on the substrate;

[0011] The display panel includes: a driving circuit layer, a light-emitting device layer located on the side of the driving circuit layer opposite to the substrate, and an encapsulation layer located on the side of the light-emitting device layer opposite to the substrate.

[0012] The driving signal line and the sensing signal line are located on the side of the encapsulation layer away from the substrate.

[0013] The first grounding line is disposed on the same layer as at least a portion of the drive signal line or the sensing signal line.

[0014] In some embodiments, both the first grounding line and the second grounding line are multiple;

[0015] At least one of the following connections is interconnected via a current-carrying line: between adjacent first grounding lines, between adjacent second grounding lines, between the second grounding line and the bonding impedance test lead, and between adjacent bonding impedance test leads.

[0016] In some embodiments, the current-carrying line includes: a plurality of straight traces; the extension direction of the straight traces intersects with the extension direction of the first grounding line, the second grounding line, or the bonding impedance test lead to which they are connected.

[0017] In some embodiments, the angle between the extension direction of the straight trace and the extension direction of the first grounding line, the second grounding line, or the bonding impedance test lead to which it is connected is 10 degrees to 80 degrees.

[0018] In some embodiments, adjacent straight traces are spaced apart.

[0019] In some embodiments, adjacent straight lines are connected end-to-end and / or cross-connected.

[0020] In some embodiments, the current-carrying line includes: a plurality of arc-shaped traces; both ends of the arc-shaped traces are connected to one of a first grounding trace, a second grounding trace, or a bonding impedance test lead; the tangent of the arc-shaped traces is connected to another of the first grounding trace, the second grounding trace, or a bonding impedance test lead.

[0021] In some embodiments, the arc of the curved trace is between 30 and 150 degrees.

[0022] In some embodiments, adjacent arcuate traces are spaced apart.

[0023] In some embodiments, adjacent curved traces are connected end-to-end and / or cross-connected.

[0024] Secondly, embodiments of this disclosure provide a touch display device, the touch display device including the touch display module as provided in the first aspect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an exemplary touch display module.

[0026] Figure 2A This is a schematic diagram of the structure of a display module provided in an embodiment of this disclosure.

[0027] Figure 2B for Figure 2A A schematic diagram of the cross-sectional structure along the A-A' direction.

[0028] Figure 3A A schematic diagram of the connection structure of the first type of flow guiding line provided in the embodiments of this disclosure.

[0029] Figure 3B This is a schematic diagram of the connection structure of the second type of flow guiding line provided in the embodiments of this disclosure.

[0030] Figure 3C A schematic diagram of the connection structure of the third type of flow guiding line provided in this embodiment of the present disclosure.

[0031] Figure 3D This is a schematic diagram of the connection structure of the fourth type of flow guiding line provided in the embodiments of this disclosure.

[0032] Figure 3E This is a schematic diagram of the connection structure of the fifth type of flow guiding line provided in the embodiments of this disclosure.

[0033] Figure 3F A schematic diagram of the connection structure of the sixth type of flow guiding line provided in this embodiment of the disclosure.

[0034] Figure 4A This is a schematic diagram of the connection structure of the seventh type of flow guiding line provided in the embodiments of this disclosure.

[0035] Figure 4B This is a schematic diagram of the connection structure of the eighth type of flow guiding line provided in the embodiments of this disclosure.

[0036] Figure 4C A schematic diagram of the connection structure of the ninth type of flow guiding line provided in this embodiment of the present disclosure.

[0037] Figure 4D A schematic diagram of the connection structure of the tenth flow guiding line provided in this embodiment of the present disclosure.

[0038] Figure 4E This is a schematic diagram of the connection structure of the eleventh type of flow guiding line provided in the embodiments of this disclosure.

[0039] Figure 4F This is a schematic diagram of the connection structure of the twelfth type of flow guiding line provided in the embodiments of this disclosure. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, more explicit, and easier to understand, the technical solutions of the embodiments of this disclosure will be clearly, completely, and in detail described below with reference to the accompanying drawings. It should be particularly noted that the embodiments described herein are merely representative embodiments of a portion of all embodiments covered by this disclosure, and not an exhaustive representation of all possible embodiments. Generally, the components, structures, modules, or steps described and shown in the accompanying drawings of this disclosure can be implemented in various different specific configurations, arrangements, combinations, or design layouts, all of which fall within the scope of the concept of this disclosure. Therefore, the following detailed description of the embodiments of this disclosure provided in the accompanying drawings is intended only to illustrate and explain certain preferred or exemplary implementations of this disclosure, and is not intended to limit the scope, meaning, or legal effect of the claimed disclosure in any way. In other words, this detailed description only represents several embodiments selected by this disclosure and should not be construed as any inappropriate reduction, limitation, or exclusion of the entire content of this disclosure or the claimed technical solutions.

[0041] Based on the embodiments described in this disclosure, all other embodiments obtained by those skilled in the art through reasonable logical reasoning, simple experimentation, or conventional means without any inventive effort, whether explicitly described herein or disclosed implicitly, should fall within the scope of protection of this disclosure. Furthermore, provided that no technical contradictions, logical conflicts, or semantic inconsistencies occur, different embodiments of this disclosure and different technical features (including but not limited to method steps, structural components, parameter conditions, etc.) within each embodiment can be arbitrarily combined, substituted, superimposed, or rearranged to form new implementation methods not directly described in writing herein but also belonging to the overall concept of this disclosure. Any such combination or derivative, as long as it does not depart from the core technical principles of this disclosure, should be considered part of this disclosure.

[0042] Unless otherwise defined, all technical and scientific terms used in this disclosure shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains (i.e., a person of ordinary skill in the art). In this disclosure, ordinal numbers such as “first,” “second,” and “third” are used only to distinguish different components, elements, regions, or layers, and do not indicate any order, quantity, importance, or hierarchical relationship. Similarly, the words “a,” “one,” “the,” “the,” and similar singular expressions, unless explicitly defined by context, do not indicate a quantitative limitation (i.e., not “only one”), but rather indicate the presence of at least one of the indicated objects. The terms “comprising,” “including,” “having,” “containing,” and any grammatical variations thereof are intended to cover a non-exclusive inclusion relationship, that is, the elements, components, steps, features, or values ​​listed after these words, and their equivalents, without excluding the existence of other elements, components, steps, features, or values ​​not expressly listed.

[0043] In this disclosure, the terms "multiple" or "several" refer to two or more quantities (including two). The term "and / or" is used to describe multiple possible combinations of relationships between related objects, indicating that three different logical relationships can exist. For example, "A and / or B" can represent: A alone, A and B simultaneously, and B alone. Similarly, the symbol " / " generally indicates an "or" choice relationship between the preceding and following related objects. For example, "A / B" is usually understood as A or B, unless the context explicitly specifies otherwise. Examples or descriptions introduced in this disclosure using words such as "exemplary," "for example," and "such as" are only used to better illustrate the technical solutions of this disclosure and should not be construed as any limitation on the scope or necessity of the solutions.

[0044] Furthermore, the various expressions used in this disclosure, such as "some embodiments," "one embodiment," "exemplary embodiment," "optional embodiment," or "preferred embodiment," all mean that a specific feature, structure, material, or characteristic described in association with that embodiment or example is included in at least one embodiment of this disclosure. The appearance of these terms in different paragraphs or positions does not necessarily refer to the same embodiment, but may also point to different implementation methods. When a feature, structure, material, or characteristic is described as "optional" or "optional," it means that the feature may or may not be present. This disclosure does not make any mandatory requirements regarding its presence or absence, and those skilled in the art can choose to use or omit it according to actual needs.

[0045] It should be noted that the scales, dimensions, shapes, and relative positions shown in the accompanying drawings and specifications of this disclosure are merely illustrative and do not constitute any limitation on the physical implementation of an actual product, method, or system. Unless otherwise expressly stated, all numerical values, ranges, and interval endpoints appearing in this disclosure should be understood to include reasonable deviations due to measurement errors, manufacturing tolerances, environmental variations, or rounding. Any range provided in this disclosure (e.g., numerical ranges, time ranges, grayscale ranges, etc.) includes the endpoint values ​​of that range as well as all intermediate values ​​and subranges between the endpoints. Any intermediate value or subrange not expressly listed in this disclosure, provided it falls within the stated range, should be considered an extension of the concept of this disclosure.

[0046] Figure 1 This is a schematic diagram of an exemplary touch display module, such as... Figure 1 As shown, one or two ground lines GND are set around the Touch panel. Figure 1 The diagram illustrates two grounding lines (GND) for electrostatic discharge (ESD) protection. These GND lines extend along the periphery of the Touch panel, surrounding multiple drive signal lines TX (TX1 to TX4) and multiple sensing signal lines RX (RX1 to RX6) within the touch sensing area to form an ESD shield and discharge path. The GND lines around the Touch panel typically extend parallel to the Touch panel's edge, and the two GND lines are independent of each other, each providing a specific ESD protection function.

[0047] However, during electrostatic discharge (ESD) reliability testing, the electric shock gun typically applies an electrostatic shock from the edge of the touch panel. The incident direction of the electrostatic charge can be arbitrary, including oblique, vertical, and horizontal directions. Currently, the grounding line GND extends only parallel to the edge of the touch panel. When the ESD charge is incident perpendicular to the extension direction of the grounding line GND (i.e., perpendicularly impacting the edge of the touch panel), the ESD charge is difficult to effectively discharge along the grounding line GND. Under repeated ESD shocks, the weaker areas of the grounding line GND are prone to breakage, leading to ESD protection failure. Simultaneously, the drive signal line TX and the sensing signal line RX may also melt due to ESD, causing touch function failure and severely impacting the reliability and lifespan of the display module.

[0048] In addition, existing grounding lines (GND) typically only extend to the flexible printed circuit board (FPC), lacking coordination with other functional leads on the FPC. This results in a relatively simple electrostatic discharge path, further reducing the reliability of electrostatic protection.

[0049] In order to at least solve one of the above-mentioned technical problems, the present disclosure provides a display module and a display device. The display module and display device provided in the present disclosure will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0050] In a first aspect, embodiments of this disclosure provide a display module. Figure 2A This is a schematic diagram of the structure of a display module provided in an embodiment of the present disclosure, such as... Figure 2A As shown, the touch display module includes: a touch panel (Touch) and a flexible printed circuit board (FPC); the touch panel (Touch) is connected to the flexible printed circuit board (FPC); the touch display module also includes: a first ground line GND1 and a second ground line GND2; the touch panel (Touch) includes: multiple drive signal lines (TX) and multiple sensing signal lines (RX) arranged in a cross configuration; the flexible printed circuit board (FPC) includes: multiple bonding impedance test leads; the first ground line GND1 at least partially surrounds the drive signal lines (TX) and sensing signal lines (RX); the second ground line GND2 is formed by extending the first ground line GND1 onto the flexible printed circuit board (FPC), and the second ground line GND2 is adjacent to and connected to the bonding impedance test leads (Bonding) at the same grounding terminal.

[0051] The Touch panel is connected to a flexible printed circuit board (FPC). The FPC is used to lead the touch signals from the Touch panel to external circuitry, such as the motherboard of the device, thereby enabling the transmission and processing of touch signals. Specifically, the Touch panel can be a capacitive touch panel, a resistive touch panel, or other types of touch panels; this embodiment is not limited to these. The Touch panel has a touch-sensing area for sensing user touch operations. The FPC can be a bendable printed circuit board, with one end connected to the bonding area of ​​the Touch panel and the other end connected to the motherboard. The connection between the Touch panel and the FPC can be a bonding process, whereby anisotropic conductive adhesive is used to press the pins on the Touch panel to the gold fingers on the FPC, achieving both electrical connection and mechanical fixation. The FPC not only transmits touch signals but also provides power signals, ground signals, etc., to the Touch panel to meet its normal operating requirements.

[0052] In practical applications, the display module may further include a display panel, which is stacked with a touch panel. The display panel can be an organic light-emitting diode (OLED) display panel, a liquid crystal display panel, a micro LED display panel, etc., and this embodiment does not limit the type. The touch panel can be located on the light-emitting side of the display panel, or it can be integrated with the display panel on the same substrate to form an integrated touch display structure. When a user touches the touch panel, the touch panel senses the touch position and generates a touch signal. The touch signal is transmitted to the touch chip on the mainboard via a flexible printed circuit board (FPC). The touch chip determines the touch position based on the touch signal and executes the corresponding control operation.

[0053] The Touch panel includes multiple drive signal lines TX and multiple sensing signal lines RX arranged in a cross configuration. The drive signal lines TX extend along a first direction, and the sensing signal lines RX extend along a second direction, intersecting each other. For example, the first direction can be the column direction of the Touch panel, and the second direction can be the row direction; this disclosure does not limit this. An insulating layer is provided between the drive signal lines TX and the sensing signal lines RX to insulate them from each other at their intersections. The drive signal lines TX and sensing signal lines RX can be made of transparent conductive materials, such as indium tin oxide, silver nanowires, or metal mesh, to ensure light transmittance while enabling electrical signal transmission.

[0054] The drive signal line TX and the sensing signal line RX form a mutual capacitance node at their intersection. When a user touches the touch panel, the mutual capacitance value at the touch location changes. The touch chip detects this change in mutual capacitance value to determine the touch location, thus enabling the touch function. The drive signal line TX receives the drive signal from the touch chip, while the sensing signal line RX transmits the sensed touch signal back to the touch chip. Multiple drive signal lines TX and multiple sensing signal lines RX together constitute the touch sensing area of ​​the touch panel.

[0055] The flexible printed circuit board (FPC) includes multiple bonding impedance test leads, each connected to a corresponding bonding impedance test pin. The bonding impedance test pins are used during the display module manufacturing process to detect the bonding impedance between the touch panel and the FPC, monitoring the quality of the bonding process. The bonding impedance test leads extend from these pins to deliver the bonding impedance test signal to the testing equipment. In conventional designs, the bonding impedance test pins and bonding leads are only used during factory testing and remain idle after testing, not participating in the normal operation of the display module. However, in this embodiment, the bonding impedance test leads are reused as part of the grounding path, as will be explained in detail later.

[0056] The first ground line GND1 is disposed on the periphery of the Touch panel and at least partially surrounds the drive signal line TX and the sensing signal line RX. The first ground line GND1 may extend along the outer edge of the Touch panel, maintaining an insulating gap with the drive signal line TX and the sensing signal line RX to form an electrostatic shield and discharge path around the Touch panel. The first ground line GND1 may be made of a metallic material, such as molybdenum, aluminum, copper, silver, or alloys thereof.

[0057] The first grounding line GND1 is at least partially wrapped around the drive signal line TX and the sensing signal line RX. That is, the first grounding line GND1 can either form a ring around the entire touch sensing area or only surround a portion of the touch sensing area's edge. When electrostatic charge enters from the edge of the touch panel, the first grounding line GND1 can guide at least a portion of the electrostatic charge to the ground terminal, thereby reducing the impact of electrostatic charge on the internal drive signal line TX and sensing signal line RX, providing primary electrostatic protection. The line width of the first grounding line GND1 can be designed according to actual electrostatic protection requirements. For example, the line width can be appropriately increased in areas with a high risk of electrostatic shock to improve anti-static capability.

[0058] The second grounding line GND2 is formed by extending the first grounding line GND1 onto the flexible printed circuit board (FPC). In other words, after extending along the periphery of the touch panel, the first grounding line GND1 continues to extend onto the flexible printed circuit board (FPC), forming the second grounding line GND2 on the FPC. The second grounding line GND2 is electrically connected to the first grounding line GND1, together forming a grounding path from the touch panel to the flexible printed circuit board (FPC). The trace material of the second grounding line GND2 can be the same as that of the first grounding line GND1, or other suitable conductive materials can be selected according to the manufacturing process requirements of the flexible printed circuit board (FPC), which will not be elaborated here.

[0059] The second grounding line GND2 is positioned adjacent to the bonding impedance test lead Bonding, and both are connected to the same grounding terminal. "Adjacent" means that the second grounding line GND2 and the bonding impedance test lead Bonding extend side-by-side on the flexible printed circuit board (FPC) with minimal spacing; they can be coupled but do not need to be in direct contact. "Connected to the same grounding terminal" means that both the second grounding line GND2 and the bonding impedance test lead Bonding are electrically connected to the same grounding network on the FPC, for example, through grounding vias, grounding copper pours, or grounding connectors, to the overall system ground.

[0060] Therefore, the second grounding line GND2 and the bonding impedance test lead together form a grounding network on the flexible printed circuit board (FPC). The bonding impedance test lead, originally used only for bonding impedance testing, also serves as part of the grounding path, thus providing an additional discharge path for electrostatic charge on the FPC. When electrostatic charge is conducted from the first grounding line GND1 to the second grounding line GND2, it can be further guided to the grounding terminal via the bonding impedance test lead, which is adjacent to and shares ground with the second grounding line GND2, forming a secondary electrostatic discharge path. The adjacent arrangement of the second grounding line GND2 and the bonding impedance test lead creates a parallel grounding connection between them electrically. Even if one path is damaged by electrostatic discharge, the other path can continue to perform electrostatic discharge, thereby improving the reliability of electrostatic protection.

[0061] In the display module provided in this embodiment, the first grounding line GND1 is extended to the flexible printed circuit board (FPC) to form a second grounding line GND2. The second grounding line GND2 is arranged adjacent to and connected to the same grounding terminal of the bonding impedance test lead on the FPC. This fully utilizes the existing bonding impedance test lead on the FPC as a grounding path, providing more discharge paths for electrostatic charges without increasing additional wiring or manufacturing costs, thus enhancing the overall electrostatic protection capability of the display module. Simultaneously, since the second grounding line GND2 and the bonding impedance test lead are adjacent and share a grounding terminal, they form a parallel grounding connection on the FPC. Even if one path is damaged by electrostatic discharge, the other path can continue to perform electrostatic discharge, thereby improving the reliability of electrostatic protection. Furthermore, the first grounding line GND1 at least partially surrounds the drive signal line TX and the sensing signal line RX, forming a primary electrostatic shielding and discharge path around the touch panel. This, combined with the secondary electrostatic discharge channel formed by the second grounding line GND2 and the bonding impedance test lead, creates a hierarchical electrostatic protection architecture, effectively enhancing the display module's resistance to electrostatic discharge. Moreover, this embodiment of the present disclosure significantly improves electrostatic protection performance without altering the overall structure of the existing display module or incurring additional manufacturing costs, demonstrating good practical value and application prospects.

[0062] Figure 2B for Figure 2A A schematic diagram of the cross-sectional structure along the A-A' direction, as shown below. Figure 2A and Figure 2B As shown, the touch display module further includes: a substrate 100 and a display panel on the substrate 100; the display panel includes: a driving circuit layer 101, a light-emitting device layer 102 located on the side of the driving circuit layer 101 away from the substrate 100, and an encapsulation layer 103 located on the side of the light-emitting device layer 102 away from the substrate; the driving signal line TX and the sensing signal line RX are located on the side of the encapsulation layer 103 away from the substrate 100; the first ground line GND1 is disposed on the same layer as at least a portion of the driving signal line TX or the sensing signal line RX.

[0063] The display panel may include a driving circuit layer 101, a light-emitting device layer 102, and an encapsulation layer 103. The driving circuit layer 101 is located on the substrate 100 and may contain multiple signal lines, thin-film transistors, and other driving elements to provide driving signals to the light-emitting device layer 102, thereby controlling the light-emitting state of the light-emitting device layer 102. The light-emitting device layer 102 is located on the side of the driving circuit layer 101 facing away from the substrate 100. The light-emitting device layer 102 may include multiple light-emitting units, such as organic light-emitting diodes (OLEDs). Each light-emitting unit emits light under the control of the driving circuit layer 101, thereby forming a display image. The encapsulation layer 103 is located on the side of the light-emitting device layer 102 facing away from the substrate 100. The encapsulation layer 103 covers the light-emitting device layer 102, isolating it from the external environment and preventing moisture, oxygen, etc., from penetrating the light-emitting device layer 102 and causing degradation of the light-emitting material, thereby extending the lifespan of the display panel.

[0064] The driving signal line TX and the sensing signal line RX are located on the side of the encapsulation layer 103 facing away from the substrate 100. That is, the driving signal line TX and the sensing signal line RX can be positioned above the encapsulation layer 103, thereby directly forming a touch sensing structure on the encapsulation layer 103 of the display panel. Therefore, the display panel and the touch sensing structure can be integrated into the same module, eliminating the need for a separate touch panel, which helps reduce the overall thickness of the display module and simplifies the manufacturing process.

[0065] The first ground line GND1 is disposed on the same layer as at least a portion of the drive signal line TX or the sensing signal line RX. That is, the first ground line GND1 can be located on the same layer as the drive signal line TX and / or the sensing signal line RX, and can be formed through the same patterning process. This same-layer arrangement simplifies the manufacturing process, reduces the number of photomasks, lowers manufacturing costs, and also helps reduce the overall thickness of the display module. Furthermore, the co-layer arrangement of the first ground line GND1 with the drive signal line TX or the sensing signal line RX ensures a stable positional relationship between the first ground line GND1 and the drive signal line TX and the sensing signal line RX, facilitating the formation of an electrostatic shielding and discharge path around the drive signal line TX and the sensing signal line RX on the periphery of the touch panel, thereby improving the electrostatic protection capability of the display module.

[0066] In some embodiments, such as Figure 2AAs shown, there are multiple first grounding lines GND1 and second grounding lines GND2; at least one of the following connections is interconnected via a current-conducting line DL: between adjacent first grounding lines GND1, between adjacent second grounding lines GND2, between a second grounding line GND2 and a bonding impedance test lead, and between adjacent bonding impedance test leads.

[0067] There are multiple first grounding lines GND1 and second grounding lines GND2. Taking two as an example, the two first grounding lines GND1 can be set at different positions on the periphery of the Touch panel, such as distributed along different edges of the Touch panel, or spaced apart on the same side edge, to form a multi-level electrostatic shielding structure on the periphery of the Touch panel. Similarly, the two second grounding lines GND2 are formed by extending the two first grounding lines GND1 one-to-one onto the flexible printed circuit board (FPC), thus forming two parallel grounding traces on the FPC. The two bonding impedance test leads also extend parallel to each other on the FPC, together with the two second grounding lines GND2, forming part of the grounding network on the FPC.

[0068] To enhance the reliability of connections between traces, a current-carrying trace (DL) is used to interconnect adjacent first ground lines (GND1), adjacent second ground lines (GND2), the second ground line (GND2) and the bonding impedance test lead (Bonding), and adjacent bonding impedance test leads (Bonding). In other words, the current-carrying trace (DL) can be located at any one or more of the above four locations to establish an electrical connection between adjacent traces. The current-carrying trace (DL) can be a conductive trace formed on a touch panel or a flexible printed circuit board (FPC), connecting two adjacent traces together to create structural coupling between them.

[0069] When one of the traces breaks due to electrostatic discharge or other reasons, the adjacent trace can still maintain electrical continuity through the current-carrying line DL, thereby maintaining the integrity of the grounding network and preventing electrostatic discharge failure. Furthermore, the current-carrying line DL can change the direction of electrostatic charge flow, allowing the charge injected by the electric gun to be guided to the grounding terminal along the direction of the current-carrying line DL and the grounding line, improving electrostatic discharge efficiency.

[0070] Furthermore, the current-guiding line DL connects adjacent traces together. During electrostatic discharge testing or actual electrostatic shock, it can divert and guide the charge injected by the electric gun between adjacent traces. The charge is no longer concentrated on the single trace being impacted, but can be dispersed to adjacent traces through the current-guiding line DL and guided to the grounding terminal through multiple paths. This reduces the local charge density, lowers the risk of traces melting or breaking due to charge concentration, and further improves the electrostatic protection effect.

[0071] In some embodiments, the current-conducting line DL may be disposed only between adjacent first ground lines GND1; in other embodiments, the current-conducting line DL may be disposed only between adjacent second ground lines GND2; in still other embodiments, the current-conducting line DL may be disposed only between the second ground line GND2 and the bonding impedance test lead; in other embodiments, the current-conducting line DL may be disposed only between adjacent bonding impedance test leads. Of course, the current-conducting line DL may also be disposed in any combination of the above-mentioned locations.

[0072] Figure 3A This is a schematic diagram of the connection structure of the first type of flow guiding line provided in this embodiment of the disclosure. Figure 3B This is a schematic diagram of the connection structure of the second type of flow guiding line provided in this embodiment of the present disclosure. Figure 3C This is a schematic diagram of the connection structure of the third type of flow guiding line provided in this embodiment of the disclosure. Figure 3D This is a schematic diagram of the connection structure of the fourth type of flow guiding line provided in this embodiment of the disclosure. Figure 3E This is a schematic diagram of the connection structure of the fifth type of flow guiding line provided in this embodiment of the disclosure. Figure 3F This is a schematic diagram of the connection structure of the sixth type of flow guiding line provided in the embodiments of this disclosure, as shown below. Figures 3A to 3F As shown, the current-carrying line DL includes: multiple straight lines DL1; the extension direction of the straight lines DL1 intersects with the extension direction of the first grounding line GND1, the second grounding line GND2, or the bonding impedance test lead Bonding to which they are connected.

[0073] The current-carrying path DL may include multiple straight traces DL1. These multiple straight traces DL1 may be located at at least one of the following locations: between adjacent first ground lines GND1, between adjacent second ground lines GND2, between a second ground line GND2 and a bonding impedance test lead, and between adjacent bonding impedance test leads, to electrically connect adjacent connected traces at corresponding locations. Each straight trace DL1 has two ends connected to two adjacent connected traces; that is, one end of the straight trace DL1 is connected to one of the connected traces, and the other end is connected to the adjacent connected trace, thereby forming a bridging current-carrying path between the two adjacent connected traces. The connected traces include the first ground line GND1, the second ground line GND2, and the bonding impedance test lead. The straight traces DL1 may be formed on a touch panel or on a flexible printed circuit board (FPC), and their specific location can be determined based on the location of the connected traces.

[0074] The extension direction of the straight trace DL1 intersects the extension direction of the first grounding line GND1, the second grounding line GND2, or the bonding impedance test lead Bonding to which it is connected. That is, the straight trace DL1 does not extend parallel to the connected trace, but rather crosses between two adjacent connected traces at a certain angle. This intersection creates a non-parallel angle between the straight trace DL1 and the connected trace, thus constructing an inclined current-carrying channel between the two adjacent connected traces. The angle between the extension direction of the straight trace DL1 and the extension direction of the connected trace can be from 10 degrees to 80 degrees, preferably 45 degrees. When the angle is too small, the straight trace DL1 is nearly parallel to the connected trace, and the change in current-carrying direction is not significant; when the angle is too large, the straight trace DL1 is nearly perpendicular to the connected trace, which, although it can change the charge direction, may occupy a large amount of wiring space. Therefore, setting the included angle within the range of 10 to 80 degrees can achieve a good balance between the flow guiding effect and the wiring space.

[0075] Because the extension direction of the straight trace DL1 intersects with the extension direction of the connected traces, when an electric shock gun vertically impacts the edge of the touch panel or the traces on the flexible circuit board, the electrostatic charge, which was originally incident perpendicular to the connected traces, is difficult to discharge along the trace direction. However, after setting the straight trace DL1, it can change the flow direction of the electrostatic charge, changing the charge from a vertical direction to an inclined direction along the straight trace DL1, thus guiding it to the adjacent connected traces, and finally guiding it to the grounding terminal along the connected trace direction. Therefore, the straight trace DL1 not only enhances the structural coupling between adjacent connected traces, but also provides a backup discharge path when a connected trace experiences an open circuit due to electrostatic impact, allowing the charge to still flow to the adjacent connected traces and be guided to the grounding terminal via the straight trace DL1, thereby maintaining the connectivity of the grounding network and improving the reliability of electrostatic protection.

[0076] Because the extension direction of the straight trace DL1 intersects with the extension direction of the connected traces, when an electric shock gun vertically impacts the edge of the Touch panel or the traces on the flexible printed circuit board (FPC), the electrostatic charge, which was originally incident perpendicular to the connected traces, is difficult to discharge along the trace direction. However, after setting the straight trace DL1, it can change the flow direction of the electrostatic charge, changing the charge from a vertical direction to an inclined direction along the straight trace DL1, thereby guiding it to the adjacent connected traces and finally to the grounding terminal along the connected trace direction. Thus, the straight trace DL1 not only enhances the structural coupling between adjacent connected traces, but also provides a backup discharge path when a connected trace experiences an open circuit due to electrostatic impact. This allows the charge to still flow to the adjacent connected traces and be discharged to the grounding terminal via the straight trace DL1, thereby maintaining the connectivity of the grounding network and improving the reliability of electrostatic protection.

[0077] In some embodiments, such as Figure 3A and Figure 3B As shown, adjacent straight traces DL1 are spaced apart.

[0078] The spacing between adjacent straight traces DL1 means that each straight trace DL1 is spatially separated and does not directly contact the others, thus forming independent flow paths between adjacent connected traces. In other words, each straight trace DL1 independently bridges two adjacent connected traces; there is no direct electrical or physical connection between the straight traces DL1, but rather they connect adjacent connected traces through their own independent routing paths. Therefore, multiple parallel and independent flow channels can be formed between adjacent connected traces.

[0079] The straight traces DL1 can be parallel to each other or not parallel to each other, as long as the spacing setting is met. When the straight traces DL1 are parallel to each other (e.g. Figure 3A As shown, a uniformly distributed inclined current-carrying channel can be formed between adjacent connected traces. Since the inclination angle of each straight trace DL1 is consistent, the flow direction of electrostatic charge on each current-carrying path is the same. The charge can be dispersed and discharged along multiple parallel paths, which helps reduce the charge density on a single current-carrying path and avoids excessive charge concentration on a single straight trace DL1, preventing that trace from melting or breaking. Multiple parallel straight traces DL1 can also form a regular current-carrying network between adjacent connected traces, facilitating wiring design and process implementation, and helping to improve production yield.

[0080] When the straight lines DL1 are not parallel to each other (e.g.) Figure 3B As shown, each straight trace DL1 can have different tilt angles, thus forming current-carrying channels with different directions between adjacent connected traces. Since the incident direction of electrostatic discharge (ESD) can be arbitrary, including oblique, vertical, and horizontal directions, straight traces DL1 with different tilt angles can adapt to ESD discharges from different directions. For example, when the stun gun strikes at a certain tilt angle, a straight trace DL1 with a smaller angle to that incident direction can more efficiently conduct the charge; when the stun gun strikes at another tilt angle, another straight trace DL1 with a different tilt angle can take over the current-carrying function. Therefore, multiple non-parallel straight traces DL1 can improve the adaptability of the current-carrying circuit DL to different ESD discharge directions, allowing charges from different incident directions to find a suitable current-carrying path, thereby improving the comprehensiveness and reliability of ESD protection.

[0081] In some embodiments, such as Figures 3C to 3F As shown, adjacent straight lines DL1 are connected end to end or cross each other.

[0082] End-to-end connection refers to two adjacent straight traces DL1 being connected at one end to each other, with this connection point also connected to a connected trace. The other ends of both straight traces DL1 are connected to another adjacent connected trace, forming a V-shaped current-guiding structure between the two connected traces. In this V-shaped structure, the two straight traces DL1 originate from a point on the same connected trace, branch off, and extend to different locations on the other connected trace, thus creating branching current-guiding paths between the two connected traces. Charge can enter from one connected trace, be diverted to the other connected trace via the two straight traces DL1, or flow in the opposite direction. Because the two straight traces DL1 extend in different directions, the V-shaped structure can change the direction of charge flow, allowing the charge to flow along two inclined directions, thus more flexibly adapting to electrostatic shocks from different directions. When one of the straight traces DL1 experiences a partial break due to electrostatic discharge, the V-shaped structure can still maintain electrical continuity through the other straight trace DL1, providing a backup current path and preventing the grounding network from being completely paralyzed due to a single point of failure.

[0083] A cross connection refers to two adjacent straight traces DL1 crossing and connecting to each other at the middle, with each straight trace DL1 connecting to two adjacent connected traces at its two ends, thus forming an X-shaped current-guiding structure. Specifically, one straight trace DL1 connects to the first and second connected traces at its two ends, and the other straight trace DL1 also connects to the first and second connected traces at its two ends. The two straight traces DL1 cross and connect to each other at the middle, forming an electrical connection at the intersection. Thus, two intersecting current-guiding paths are formed between the two connected traces through the two straight traces DL1, allowing charge to flow from any connected trace to the other connected trace via any straight trace DL1, achieving multi-directional current splitting at the intersection. When electrostatic charge enters the X-shaped structure from a connected trace, the charge can be dispersed into two different directions at the intersection and flow along the two straight traces DL1 to the other connected trace, thereby effectively reducing the local charge density and preventing excessive charge concentration on a single trace. Simultaneously, the X-shaped structure provides more redundant flow paths; even if one straight trace DL1 is damaged by electrostatic discharge, the charge can still bypass it through the other straight trace DL1, maintaining the connectivity of the grounding network.

[0084] Adjacent straight lines DL1 can be connected end-to-end and / or cross-connected. "Or" indicates that one of the two connection methods can be used, meaning that the flow path DL can use only end-to-end connections or only cross-connections. "And" indicates that both connection methods exist simultaneously, meaning that in the same flow path DL, there are both end-to-end connected straight lines DL1 and cross-connected straight lines DL1.

[0085] Specifically, the following implementation methods are possible: In one implementation method, adjacent straight-line traces DL1 are connected end-to-end, that is, multiple straight-line traces DL1 are connected end-to-end in pairs to form a V-shaped flow guiding structure, and each V-shaped structure can be spaced apart (e.g. Figure 3C As shown), they can also be connected to each other (e.g. Figure 3D As shown); in another embodiment, adjacent straight lines DL1 are cross-connected, that is, multiple straight lines DL1 cross and connect to each other at the middle position to form an X-shaped flow guide structure, and each X-shaped structure can be spaced apart (e.g. Figure 3E As shown), they can also be connected to each other (e.g. Figure 3F (As shown).

[0086] Whether connected end-to-end or cross-connected, adjacent straight traces DL1 form a direct electrical connection, resulting in tighter coupling between adjacent connected traces. Compared to the spaced-out method, end-to-end and cross-connections provide a more complex current-guiding network and more redundant paths, thus effectively guiding charge to the grounding terminal even under repeated electric shocks or local trace damage, further improving the electrostatic discharge protection capability and reliability of the display module.

[0087] Figure 4A This is a schematic diagram of the connection structure of the seventh type of flow guiding line provided in this embodiment of the disclosure. Figure 4B This is a schematic diagram of the connection structure of the eighth type of flow guiding line provided in this embodiment of the disclosure. Figure 4C This is a schematic diagram of the connection structure of the ninth type of flow guiding line provided in this embodiment of the disclosure. Figure 4D This is a schematic diagram of the connection structure of the tenth type of flow guiding line provided in this embodiment of the disclosure. Figure 4E This is a schematic diagram of the connection structure of the eleventh type of flow guiding line provided in this embodiment of the disclosure. Figure 4F This is a schematic diagram of the connection structure of the twelfth type of flow guiding line provided in the embodiments of this disclosure, as shown below. Figures 4A to 4FAs shown, the current-conducting line DL includes: multiple arc-shaped traces DL2; both ends of the arc-shaped traces DL2 are connected to one of a first ground trace GND1, a second ground trace GND2, or a bonding impedance test lead Bonding; the tangent point of the arc-shaped traces DL2 is connected to one of another first ground trace GND1, a second ground trace GND2, or a bonding impedance test lead Bonding.

[0088] The current-carrying path DL may include multiple curved traces DL2. These curved traces DL2 may be located at at least one of the following locations: between adjacent first ground lines GND1, between adjacent second ground lines GND2, between a second ground line GND2 and a bonding impedance test lead, and between adjacent bonding impedance test leads, to electrically connect adjacent connected traces at corresponding locations. The connected traces include the first ground line GND1, the second ground line GND2, and the bonding impedance test lead. The curved traces DL2 may be formed on a touch panel or on a flexible printed circuit board (FPC), and their specific location can be determined based on the location of the connected traces.

[0089] Each curved trace DL2 is connected to one connected trace at both ends, and the tangent point of the curved trace DL2 is connected to another connected trace. In other words, both ends of the curved trace DL2 are connected to the same connected trace, while the outward-protruding side of the curved trace DL2 (i.e., the tangent point) connects to another adjacent connected trace. Thus, the curved trace DL2 forms an arc-shaped bridging path between two adjacent connected traces. Specifically, the curved trace DL2 starts from a first position on one connected trace, extends outward along an arc-shaped trajectory, connects to another connected trace at the tangent point, continues along the arc-shaped trajectory, and finally returns to a second position on the same connected trace. The first and second positions can be different positions on the same connected trace, separated by a certain distance.

[0090] The radius of curvature of the DL2 trace can range from 30 to 150 degrees. Radius refers to the central angle corresponding to the curvature of the DL2 trace. When the radius of curvature of the DL2 trace is within the range of 30 to 150 degrees, it provides sufficient arc span to form an effective electrical connection between two adjacent connected traces, while maintaining a relatively smooth arc transition. This avoids excessively long traces due to excessive radius, which would occupy too much wiring space, or insufficient radius, which would result in an indistinct arc transition effect. If the radius is less than 30 degrees, the DL2 trace approaches a straight trace, weakening the smooth current conduction advantage of the arc transition. If the radius is greater than 150 degrees, the curvature of the DL2 trace is too great, resulting in a longer trace path, potentially increasing wiring difficulty and resistance, and hindering rapid charge conduction. Therefore, setting the radius of curvature of the DL2 trace to 30 to 150 degrees achieves a good balance between current conduction effect, wiring space, and process feasibility.

[0091] In this arc-shaped structure, both ends of the arc-shaped trace DL2 are connected to the same connected trace, creating two connection points between DL2 and the connected trace, increasing the contact area and connection reliability. The tangent point of the arc-shaped trace DL2 is connected to the adjacent connected trace, establishing an electrical connection between the two adjacent connected traces through DL2. When electrostatic charge is incident from one of the connected traces, the charge can enter DL2 through both ends, flow along the arc trajectory to the tangent point, and then be guided to the adjacent connected trace, finally being guided to the ground terminal along the direction of the connected trace. Because DL2 uses a circular arc transition, the flow path of charge in DL2 is relatively smooth, avoiding charge accumulation and reflection caused by sharp corners or bends in straight traces, which is beneficial for rapid charge discharge.

[0092] Furthermore, the tangent point of the curved trace DL2 connects to another connected trace, creating a smooth transition between DL2 and the adjacent connected trace. The tangent at the tangent point of DL2 extends in the same direction as or similar to the adjacent connected trace. When charge flows from DL2 into the adjacent connected trace, the change in flow direction is relatively gradual, reducing the likelihood of charge accumulation or localized electric field concentration, thus further improving electrostatic discharge efficiency. Even if one connected trace experiences a partial break due to electrostatic discharge, charge can still bypass the circuit through DL2 to the adjacent connected trace, maintaining the connectivity of the grounding network. Even if one end of DL2 is damaged by electrostatic discharge, charge can still enter DL2 through the other end and be guided to the adjacent connected trace via the tangent point, providing a backup current path.

[0093] In some embodiments, such as Figures 4A to 4BAs shown, adjacent curved traces DL2 are spaced apart.

[0094] The spacing between adjacent curved traces (DL2) means that each curved trace (DL2) is spatially separated and does not directly contact the others, thus forming independent curved current-carrying paths between adjacent connected traces. In other words, each curved trace (DL2) is independently connected to the connected traces; there is no direct electrical or physical contact between the curved traces (DL2), but rather they connect adjacent connected traces through their own independent curved trace paths. This creates multiple parallel, independent curved current-carrying channels between adjacent connected traces. The spacing prevents short circuits caused by contact between the curved traces (DL2), ensuring the electrical independence of each current-carrying path. It also allows for flexible adjustment of the spacing between the curved traces (DL2) according to the actual wiring space, avoiding increased process difficulty or unnecessary parasitic coupling due to overly dense wiring.

[0095] When the curvature of each curved trace DL2 is the same, each curved trace DL2 has the same degree of curvature and arc span (e.g., Figure 4A As shown, this configuration allows for the formation of uniform arc-shaped current-carrying channels between adjacent connected traces. Because the curvature of each arc-shaped trace (DL2) is consistent, the charge flow characteristics along each current-carrying path are similar. The charge can be evenly distributed and discharged along multiple arc-shaped paths, which helps reduce the charge density on a single current-carrying path and prevents excessive charge concentration on a particular arc-shaped trace (DL2), thus avoiding melting or breakage of that trace. Multiple arc-shaped traces (DL2) with the same curvature can also form a regular current-carrying network between adjacent connected traces, facilitating wiring design and process implementation, and contributing to improved production yield.

[0096] When the curvature of each curved trace DL2 is different, each curved trace DL2 has a different degree of curvature and arc span (e.g. Figure 4BAs shown in the diagram, this creates different conduction channels with varying characteristics between adjacent connected traces. The smaller arc-shaped trace (DL2) is nearly a straight trace, resulting in a shorter path for charge flow and facilitating rapid charge removal. The larger arc-shaped trace (DL2) has a greater curvature, resulting in a longer path for charge flow, but the smoother transition allows the charge to gradually change direction during flow, reducing the impact on the trace. Since the incident direction of electrostatic discharge (ESD) shocks can be arbitrary, arc-shaped traces (DL2) with different curvatures can adapt to different ESD shock directions and different charge flow requirements. For example, when the electric shock gun strikes at a certain angle, the smaller arc-shaped trace (DL2) can more efficiently and quickly remove the charge; when the electric shock gun strikes at another angle, the larger arc-shaped trace (DL2) can guide the charge into adjacent connected traces in a smoother manner. Therefore, multiple arc-shaped traces (DL2) with different curvatures can improve the adaptability of the conduction circuit (DL) to different ESD shock directions, ensuring that charges from different incident directions can find suitable conduction paths, thereby enhancing the comprehensiveness and reliability of ESD protection.

[0097] In some embodiments, such as Figures 4C to 4F As shown, adjacent curved traces DL2 are connected end-to-end and / or cross-connected.

[0098] End-to-end connection refers to the connection of each end of an arc-shaped trace DL2 to one end of two adjacent arc-shaped traces DL2. In other words, each arc-shaped trace DL2 is connected to an adjacent arc-shaped trace DL2 at each end, thus connecting multiple arc-shaped traces DL2 in series to form a continuous flow path composed of multiple arc segments. In this continuous path, the arc directions of the arc-shaped traces DL2 can be the same or alternate, as long as they are connected sequentially at their ends. The continuous arc-shaped trace chain formed by end-to-end connection allows each end to be connected to an adjacent trace, or one or more arc-shaped traces DL2 in the middle to be connected to a trace, thus forming a continuous arc-shaped flow channel between adjacent traces. Charge can flow along the arc-shaped path in this continuous channel. Due to the smooth transition of the arc, the change in charge flow direction is relatively gradual, making it less prone to charge accumulation or local electric field concentration, which is conducive to rapid charge removal. When one of the arc-shaped traces DL2 experiences a partial open circuit due to electrostatic discharge, the remaining series-connected arc-shaped traces DL2 can still maintain electrical continuity, providing a backup current conduction path and preventing the grounding network from being completely paralyzed due to a single point of failure.

[0099] Cross-connection refers to two adjacent curved traces DL2 intersecting and connecting at points other than their endpoints, thus forming a cross-shaped curved current-conducting structure. In other words, the two curved traces DL2 are not connected at their ends, but rather intersect and form an electrical connection at a midpoint along their respective curved extension paths. The two ends of each curved trace DL2 are still connected to the adjacent connected traces, while the intersection point is located in the middle of the curved segment of the two curved traces DL2, not at the end of either DL2. Thus, two cross-shaped curved current-conducting paths are formed between the two connected traces through the two curved traces DL2, allowing charge to flow from one connected trace to the other via either curved trace DL2, achieving multi-directional current splitting at the intersection point. Because the curved traces DL2 use a circular arc transition, the change in charge flow direction at the intersection point is relatively gentle, making it less prone to local electric field concentration. When electrostatic charge enters the cross structure from a connected trace, the charge can be dispersed in two different directions at the cross point and flow along the two curved traces DL2 to the other connected trace, thereby effectively reducing the local charge density and preventing excessive charge concentration on a single trace. Simultaneously, the cross structure provides more redundant conduction paths; even if one curved trace DL2 is damaged by electrostatic discharge, the charge can still bypass it through the other curved trace DL2, maintaining the connectivity of the grounding network.

[0100] The curvature of each curved trace DL2 can be the same or different. When the curvature of each curved trace DL2 is the same, each curved trace DL2 has the same degree of curvature and arc span (e.g., Figure 4C and Figure 4D As shown), the charge flow characteristics are similar along each conductive path, which is beneficial for the uniform dispersion and discharge of charge along multiple arc-shaped paths, reducing the charge density on a single conductive path. Multiple arc-shaped traces DL2 with the same curvature can also form a regular conductive network between adjacent connected traces, facilitating wiring design and manufacturing processes. When the curvature of each arc-shaped trace DL2 is different, each arc-shaped trace DL2 has different degrees of curvature and arc span (e.g., ...). Figure 4E and Figure 4F As shown in the diagram, the smaller arc-shaped trace DL2 is close to a straight trace, with a shorter charge flow path, which is conducive to the rapid discharge of charge. The larger arc-shaped trace DL2 has a greater degree of curvature and a smoother arc transition, which is conducive to the gradual change of charge direction during flow and reduces the impact of charge on the trace. The arc-shaped traces DL2 with different curvatures can adapt to electrostatic shocks in different directions and different charge flow requirements, improving the adaptability of the current-conducting circuit DL to different electrostatic shock directions.

[0101] Secondly, this disclosure provides a touch display device, which includes the touch display module as provided in any of the above embodiments. This touch display device can be applied to various electronic devices requiring display functions. Exemplarily, the touch display device may include, but is not limited to: televisions, monitors, laptops, tablets, mobile phones, wearable devices (e.g., smartwatches, smart bracelets), in-vehicle display devices, virtual reality devices, augmented reality devices, etc. Since this touch display device includes the touch display module provided in any of the above embodiments, it possesses all the beneficial technical effects of the touch display module provided in any of the above embodiments, which will not be elaborated further here.

[0102] It is understood that the embodiments described above are merely several exemplary embodiments used by this disclosure to illustrate the technical principles, and are not intended to exhaustively describe or limit the scope of protection of this disclosure. This disclosure is not limited to the operation sequence, structural parameters, or numerical ranges specifically described above. For those skilled in the art, various reasonable variations, substitutions, modifications, improvements, or additions and deletions can be made based on the teachings of this disclosure without departing from the core spirit and essence of this disclosure. These variations and improvements made in response to actual application scenarios or technological evolution needs, as long as they do not substantially deviate from the technical principles disclosed in this disclosure, should all be considered to fall within the scope of protection of this disclosure. The scope of protection of this disclosure should be determined by the appended claims and their equivalents, and not by the textual description of the specific embodiments above.

Claims

1. A touch display module, characterized in that, The touch display module includes: a touch panel and a flexible circuit board; the touch panel is connected to the flexible circuit board; the touch display module also includes: a first grounding line and a second grounding line; The touch panel includes: multiple driving signal lines and multiple sensing signal lines arranged in a cross pattern; The flexible circuit board includes: multiple bonding impedance test leads; The first grounding line at least partially surrounds the drive signal line and the sensing signal line; The second grounding line is formed by extending the first grounding line to the flexible circuit board. The second grounding line is arranged adjacent to the binding impedance test lead and connected to the same grounding terminal.

2. The touch display module according to claim 1, characterized in that, The touch display module further includes: a substrate and a display panel located on the substrate; The display panel includes: a driving circuit layer, a light-emitting device layer located on the side of the driving circuit layer opposite to the substrate, and an encapsulation layer located on the side of the light-emitting device layer opposite to the substrate. The driving signal line and the sensing signal line are located on the side of the encapsulation layer away from the substrate. The first grounding line is disposed on the same layer as at least a portion of the drive signal line or the sensing signal line.

3. The touch display module according to claim 1, characterized in that, Both the first grounding line and the second grounding line are multiple; At least one of the following connections is interconnected via a current-carrying line: between adjacent first grounding lines, between adjacent second grounding lines, between the second grounding line and the bonding impedance test lead, and between adjacent bonding impedance test leads.

4. The touch display module according to claim 3, characterized in that, The current-conducting line includes: multiple straight lines; the extension direction of the straight lines intersects with the extension direction of the first grounding line, the second grounding line, or the binding impedance test lead to which they are connected.

5. The touch display module according to claim 4, characterized in that, The angle between the extension direction of the straight trace and the extension direction of the first grounding line, the second grounding line, or the bonding impedance test lead to which it is connected is 10 degrees to 80 degrees.

6. The touch display module according to claim 4, characterized in that, The adjacent straight lines are spaced apart.

7. The touch display module according to claim 4, characterized in that, The adjacent straight lines are connected end-to-end and / or cross-connected.

8. The touch display module according to claim 3, characterized in that, The current-conducting circuit includes: multiple arc-shaped traces; both ends of the arc-shaped traces are connected to one of the first grounding trace, the second grounding trace, or the bonding impedance test lead; the tangent of the arc-shaped traces is connected to another of the first grounding trace, the second grounding trace, or the bonding impedance test lead.

9. The touch display module according to claim 8, characterized in that, The arc of the curved trace is between 30 and 150 degrees.

10. The touch display module according to claim 8, characterized in that, The adjacent arc-shaped traces are spaced apart.

11. The touch display module according to claim 8, characterized in that, Adjacent arc-shaped traces are connected end-to-end and / or cross-connected.

12. A touch display device, characterized in that, The touch display device includes a touch display module as described in any one of claims 1 to 11.

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