Touch display module, touch display device and electronic equipment

Abstract

The invention relates to a touch display module which is provided with a display area (1) and a non-display area (2) connected with the display area (1), the touch display module comprises a first lead (21) and a second lead (23), the second lead (23) is arranged on the side, away from the display area (1), of the first lead (21), and a second signal is loaded on the second lead (23). The second signal and the first signal loaded on the first lead wire (21) have the same frequency and are opposite in direction, the second signal can generate electromagnetic interference radiation opposite to the first signal, and the electromagnetic interference radiation generated by the first signal is weakened, so that the electromagnetic interference radiation of the whole touch display module is reduced, and interference to electronic equipment is reduced. The invention further provides a touch display device and electronic equipment.

Description

Touch display module, touch display device and electronic device Technical Field

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

[0002] Today's touch screens are mainly plug-ins, but this type of touch screen is more expensive than the flexible multi-layer structure (FMLOC), and it is necessary to introduce a flexible multi-layer structure to reduce the cost of touch screens.

[0003] Electronic devices using a flexible multi-layer structure will emit strong electromagnetic radiation when the touch screen's touch drive signal is large, and the strong electromagnetic radiation will interfere with the electronic devices.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field.

[0005] Summary of the Invention

[0006] The purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art and to provide a touch display module, a touch display device and an electronic device.

[0007] According to one aspect of the present disclosure, a touch display module is provided, having a display area and a non-display area connected to the display area, the touch display module including a base substrate, a first lead, and a second lead, the first lead being arranged on one side of the base substrate and located in the non-display area, the first lead being used to input a first signal; the second lead being an orthographic projection of the second lead on the base substrate, being located on a side of the orthographic projection of the first lead on the base substrate away from the display area, the second lead being used to input a second signal, the second signal being of the same frequency and in the opposite direction as the first signal.

[0008] In one embodiment of the present disclosure, during the non-touch driving period, the second lead inputs a reference signal.

[0009] In one embodiment of the present disclosure, the second lead is disposed adjacent to the first lead, and the second lead and the first lead are parallel to each other.

[0010] In one embodiment of the present disclosure, the touch display module also includes a first ground line, the orthographic projection of the first ground line on the base substrate is located between the orthographic projection of the second lead on the base substrate and the orthographic projection of the first lead on the base substrate, and the first ground line is used to input a reference signal.

[0011] In one embodiment of the present disclosure, a dam is provided in the non-display area away from the display area, and the second lead is located on a side of the dam away from the display area or a side of the dam close to the display area.

[0012] In one embodiment of the present disclosure, the second lead includes a signal segment and a binding segment connected in sequence, the signal segment is parallel to the cofferdam, the binding segment is perpendicular to the cofferdam, and the width of the signal segment is greater than that of the binding segment.

[0013] In one embodiment of the present disclosure, the ratio of the width of the signal segment to the width of the binding segment is 1-10.

[0014] In one embodiment of the present disclosure, there are a plurality of second leads, and the touch display module further includes adapter wires, which are respectively connected to the plurality of first leads through via holes.

[0015] In one embodiment of the present disclosure, the touch display module also includes a touch control layer, the touch control layer includes a first sub-touch control layer and a second sub-touch control layer, the first sub-touch control layer and the second sub-touch control layer are insulated from each other, and the second lead is arranged on the same layer as at least one of the first sub-touch control layer and the second sub-touch control layer.

[0016] In one embodiment of the present disclosure, the signal segment includes a first sub-signal segment and a second sub-signal segment located at both ends of the first sub-signal segment, the first sub-signal segment is located in the first sub-touch control layer, the second sub-signal segment is located in the second sub-touch control layer, and the second sub-signal segment is connected to the first sub-signal segment through a via.

[0017] In one embodiment of the present disclosure, the width of the second lead is 30um-200um.

[0018] In one embodiment of the present disclosure, the signal segment is disconnected at an edge or corner of the non-display area.

[0019] In one embodiment of the present disclosure, the non-display area further includes a binding area, the binding area is provided with binding pins, and the first lead and the second lead are bound to the binding pins.

[0020] In one embodiment of the present disclosure, the touch display module further includes a signal amplifying module, an input end of the signal amplifying module is used to input the second signal, and an output end of the signal amplifying module is connected to the first lead.

[0021] In one embodiment of the present disclosure, the amplification module is a voltage amplification module or a current amplification module.

[0022] In one embodiment of the present disclosure, the touch display module further includes a second ground line, and the orthographic projection of the second ground line on the base substrate is located on a side of the orthographic projection of the second lead on the base substrate away from the display area.

[0023] In one embodiment of the present disclosure, the first sub-touch control layer includes a first touch electrode and a second touch electrode, the first lead includes a touch drive lead and / or a touch sensing lead, and the first touch electrode and the second touch electrode are respectively connected to a touch drive lead and a touch sensing lead.

[0024] According to another aspect of the present disclosure, a touch display module is provided, which is applied to a vehicle-mounted display device, including a base substrate, a touch control layer, a first lead and a second lead. The first lead is arranged on one side of the base substrate and is located in the non-display area. The first lead is used to input a first signal; the positive projection of the second lead on the base substrate is located on a side of the positive projection of the first lead on the base substrate away from the display area. The second lead is used to input a second signal, and the second signal is of the same frequency and opposite direction as the first signal; the touch control layer includes a touch unit, the touch unit includes a plurality of sub-touch units arranged in an array, the sub-touch unit includes a first touch electrode portion and a second touch electrode portion, one of the first touch electrode portion and the second touch electrode portion is connected to each other, and the other is connected through a bridging layer, multiple first touch electrode portions located on the same straight line constitute a first touch electrode, multiple first touch electrode portions located on the same straight line constitute a second touch electrode, and the first touch electrode and the second touch electrode are respectively connected to one first lead.

[0025] In one embodiment of the present disclosure, each first touch electrode portion has a first main body portion, and the second touch electrode portion has a second main body portion. The orthographic projection of the first main body portion on the base substrate and the orthographic projection of the second main body portion on the base substrate form an overlapping position, and the overlapping position is located at the center of the sub-touch unit.

[0026] In one embodiment of the present disclosure, the first touch electrode portion and the second touch electrode portion are coupled together via an interdigital structure.

[0027] In one embodiment of the present disclosure, the interdigital structure includes a first interdigital portion provided on the first touch electrode portion and a second interdigital portion provided on the second touch electrode portion. The first interdigital portion and the second interdigital portion are insulated on the same layer and nested with each other.

[0028] In one embodiment of the present disclosure, the first touch electrode portion and the second touch electrode portion are grid-shaped electrode lines, the touch display module includes multiple sub-pixels, and the electrode lines of the first touch electrode are arranged between adjacent sub-pixels.

[0029] In one embodiment of the present disclosure, the electrode lines of the first touch electrode portion and the electrode lines of the second touch electrode portion are at the same distance from adjacent sub-pixels.

[0030] According to another aspect of the present disclosure, a touch display device is provided, including the touch display module provided by another aspect of the present disclosure.

[0031] According to another aspect of the present disclosure, an electronic device is provided, including the touch display device provided in another aspect of the present disclosure.

[0032] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0034] FIG1 is a schematic cross-sectional view of a touch display module according to an embodiment of the present disclosure.

[0035] FIG2 is a cross-sectional schematic diagram of another touch display module according to an embodiment of the present disclosure.

[0036] FIG3 is a cross-sectional schematic diagram of another touch display module according to an embodiment of the present disclosure.

[0037] FIG4 is a cross-sectional schematic diagram of another touch display module according to an embodiment of the present disclosure.

[0038] FIG5 is a plan view of a touch display module according to an embodiment of the present disclosure when the second lead is disposed within a cofferdam.

[0039] FIG6 is a partial enlarged view of portion A in FIG5 .

[0040] FIG. 7 is a plan view of a touch display module according to an embodiment of the present disclosure when the second lead is disposed within a cofferdam.

[0041] FIG8 is a partial enlarged view of portion A in FIG7 .

[0042] FIG9 is a schematic diagram of a driving device of a touch display module according to an embodiment of the present disclosure.

[0043] FIG10 is a schematic diagram showing the principle of a touch display module according to an embodiment of the present disclosure.

[0044] FIG11 is a waveform diagram of a driving device according to an embodiment of the present disclosure.

[0045] FIG12 is a schematic diagram of another driving device of the touch display module according to an embodiment of the present disclosure.

[0046] FIG13 is a waveform diagram of another driving device according to an embodiment of the present disclosure.

[0047] FIG14 is a schematic structural diagram of a touch display module according to an embodiment of the present disclosure when a second lead is connected to a second signal.

[0048] FIG15 is a schematic structural diagram of the touch display module according to an embodiment of the present disclosure when the second lead is grounded.

[0049] FIG16 is a partial enlarged view of portion B in FIG7 .

[0050] FIG17 is a plan view of a touch display module according to an embodiment of the present disclosure when a first ground line is provided.

[0051] FIG18 is a partial enlarged view of portion A in FIG17 .

[0052] FIG19 is a plan view of the touch display module according to an embodiment of the present disclosure when the second lead is disconnected.

[0053] FIG20 is a plan view of a touch display module according to an embodiment of the present disclosure where a plurality of second leads are arranged outside the cofferdam.

[0054] FIG. 21 is a planar schematic diagram of a touch display module according to an embodiment of the present disclosure, wherein adapter wires are provided to connect a plurality of second leads.

[0055] FIG. 22 is a plan view of a touch display module according to an embodiment of the present disclosure when a second ground line is provided.

[0056] FIG23 is another partial enlarged view of portion A in FIG7 .

[0057] FIG24 is a plan view of a touch unit of the touch display module according to an embodiment of the present disclosure.

[0058] FIG25 is a plan view of another touch unit of the touch display module according to an embodiment of the present disclosure.

[0059] FIG26 is a plan view of another touch unit of the touch display module according to an embodiment of the present disclosure.

[0060] Explanation of reference numerals: 1-display area, 10-substrate, 11-thin film transistor, 111-active layer, 1121-first gate insulating layer, 1122-second gate insulating layer, 113-gate, 1131-first gate, 1132-second gate 114-interlayer dielectric layer, 115-first source, 116-drain, 117-second source, 12-light-emitting layer, 121-first electrode, 122-light-emitting element, 123-second electrode, 13- First planarization layer, 14-second planarization layer, 15-pixel definition layer, 151-pixel opening, 16-encapsulation layer, 17-buffer layer, 18-touch control layer, 181-first sub-touch control layer, 182-second sub-touch control layer, 183-first insulating layer, 184-second insulating layer, 185-sub-touch control unit, 1851-first touch electrode portion, 1852-second touch electrode portion, 1853-first main body, 18 54-first connecting portion, 1855-first interdigital portion, 1856-second main portion, 1857-second connecting portion, 1858-second interdigital portion, 1859-second matching portion, 186-transition region, 2-non-display region, 20-cofferdam, 201-first filling layer, 202-second filling layer, 203-third filling layer, 21-first lead, 211-first sub-lead, 212-second sub-lead, 213-third insulating layer, 214-fourth insulating layer, 22-third planarization layer, 23-second lead, 231-signal segment, 2311-first sub-signal segment, 2312-second sub-signal segment, 232-binding segment, 233-sub-second lead segment, 241-first grounding wire, 242-second grounding wire, 25-transfer wire, 251-main line segment, 252-branch line segment, 26-binding pin, 3-signal amplification module, 4-touch driver chip, 5-controller. DETAILED DESCRIPTION

[0061] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0062] Although relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via the other structure.

[0063] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.

[0064] Electronic devices receive various signals, such as analog, 4G, 5G, and Wi-Fi. To prevent harmful interference with vehicle receivers, electromagnetic radiation limits are set for these devices. Electronic devices using touchscreen technology typically use square, trapezoidal, or sine wave drivers for the touch driver chip. The harmonic components of the rising and falling edges of the touch driver signal waveform can generate interfering harmonics, radiating electromagnetic interference (EMI). This is particularly true for square and trapezoidal wave touch driver signals, which contain a high number of harmonic components.

[0065] Current touchscreen structures primarily utilize external plug-ins, but these structures are more expensive than flexible multilayer structures (FMLOC). Therefore, the introduction of flexible multilayer structures is needed to reduce touchscreen costs. Furthermore, FMLOC technology can also be applied to curved display terminals. The higher the voltage of the touchscreen drive signal, the more frequency variations the signal has, and the larger the touchscreen size, the stronger the electromagnetic radiation generated by the touchscreen drive signal. Stronger electromagnetic radiation can interfere with onboard electronic devices.

[0066] In the automotive industry, electromagnetic interference emission limits are set for electronic devices to prevent harmful electromagnetic radiation from interfering with them. In the emerging display field, OLED display modules have begun to be used in automotive displays, and FMLOC touch structures are gradually being adopted. Compared to traditional external touch structures, automotive OLED display modules using FMLOC touch structures have greater resistance and capacitance loading (RC loading), resulting in higher display noise.

[0067] To achieve a better touch signal-to-noise ratio and better touch performance, automotive OLED display modules using the FMLOC touch structure require higher voltages for the touch drive signals on the touch drive electrodes. However, this increased voltage increases electromagnetic interference (EMI) emissions, potentially exceeding the EMI limits for automotive electronics. This EMI issue has become a major technical bottleneck for automotive OLED display modules using the FMLOC touch structure.

[0068] Based on this, embodiments of the present disclosure provide a touch display module. As shown in Figures 1 to 23, the touch display module has a display area 1 and a non-display area 2 connected to the display area. The touch display module includes a base substrate 10, a first lead 21, and a second lead 23. The first lead 21 is provided on one side of the base substrate and located in the non-display area. The first lead 21 is used to input a first signal. The orthographic projection of the second lead 23 on the base substrate is located on a side of the orthographic projection of the first lead 21 on the base substrate away from the display area. The second lead 23 is used to input a second signal. The second signal is of the same frequency and opposite direction as the first signal.

[0069] A second lead 23 is provided on a side of the first lead 21 away from the display area 1. A second signal is loaded on the second lead 23. The second signal has the same frequency and is opposite to the first signal loaded on the first lead 21. The second signal can generate electromagnetic interference radiation in the opposite direction to the first signal, thereby weakening the electromagnetic interference radiation generated by the first signal, thereby reducing the electromagnetic interference radiation of the entire touch display module and reducing interference to electronic equipment.

[0070] The touch display module according to the embodiment of the present disclosure will be described in detail below with reference to specific examples.

[0071] As shown in Figures 1 and 2, the touch display module has a display area. Display area 1 is provided with a display layer group, which includes a drive circuit layer and a light-emitting layer 12. The drive circuit layer is provided on one side of a base substrate 11, and the light-emitting layer 12 is provided on the side of the drive circuit layer away from the base substrate 10. The display layer group also includes a first planarization layer group, which includes a first planarization layer 13. The first planarization layer 13 is provided between the array substrate and the light-emitting layer 12. A second planarization layer 14 may also be provided on the side of the first planarization layer 13 away from the base substrate 10.

[0072] The display layer group is provided on the base substrate 10, and can be directly stacked on the surface of the base substrate 10; or a buffer layer 17 can be provided on the surface of the base substrate 10, and the display layer group can be stacked on the surface of the buffer layer 17 away from the base substrate 10. The buffer layer 17 is made of insulating material.

[0073] The driving circuit layer may include a plurality of thin film transistors. The thin film transistors may be top-gate or bottom-gate. Taking a top-gate thin film transistor as an example, the thin film transistor may include an active layer 111, a gate 113, a second gate 1132, a first gate insulating layer 1121, a second gate insulating layer 1122, and a source and drain electrode, wherein:

[0074] Active layer 111 is provided on one side of base substrate 10. The material of active layer 111 can be amorphous silicon semiconductor material, low-temperature polysilicon semiconductor material, metal oxide semiconductor material, organic semiconductor material, or other types of semiconductor materials. Therefore, the thin film transistor can be an N-type thin film transistor or a P-type thin film transistor. Active layer 131 can include a channel region and two doped regions of different doping types located on either side of the channel region.

[0075] The first gate insulating layer 1121 is disposed on a side of the active layer 111 away from the substrate. The first gate insulating layer 1121 may cover the active layer 111 and the substrate 10. The first gate electrode 1131 is disposed on a side of the first gate insulating layer 1121 away from the substrate 10 and directly faces the active layer 111. That is, the projection of the first gate electrode 1131 on the substrate 10 is within the projection of the active layer 111 on the substrate 10. For example, the projection of the first gate electrode 1131 on the substrate 10 coincides with the projection of the channel region of the active layer 111 on the substrate 10. The second gate insulating layer 1122 is disposed on a side of the first gate electrode 1131 away from the substrate. The second gate insulating layer 1122 may cover the first gate electrode 1131 and the first gate insulating layer 1121. The second gate electrode 1132 is disposed on a side of the second gate insulating layer 1122 away from the substrate 10 and directly faces the active layer 111. The materials of the first gate insulating layer 1121 and the second gate insulating layer 1122 are both insulating materials such as silicon oxide.

[0076] The thin film transistor may further include an interlayer dielectric layer 114, which is disposed on a side of the second gate electrode 1132 away from the base substrate. The interlayer dielectric layer 114 may cover the second gate electrode 1132 and the second gate insulating layer 1122. The interlayer dielectric layer 114 is composed of an insulating material. Source and drain electrodes are disposed on a surface of the interlayer dielectric layer 114 away from the base substrate 10. The source and drain electrodes include a first source electrode 115 and a drain electrode 116. The first source electrode 115 and the drain electrode 116 are connected to the active layer 111. For example, the first source electrode 115 and the drain electrode 116 are respectively connected to the two corresponding doped regions of the active layer 111 through vias.

[0077] A first planarization layer 13 is provided on the side of the source and drain electrodes facing away from the base substrate 10, and the surface of the first planarization layer 13 facing away from the base substrate 10 is flat. The source and drain electrodes may also include a second source electrode 117, which is connected to the first source electrode 115. A second planarization layer 14 is provided on the side of the second source electrode 117 facing away from the base substrate 10, covering the second source electrode 117 and the first planarization layer 13. A protective layer may also be provided on the side of the first source electrode 115 facing away from the base substrate 10, covering the first source electrode 115 and the drain electrode 116. The first planarization layer 13 covers the protective layer.

[0078] The light-emitting layer is disposed on the side of the first planarization layer 13 or the second planarization layer 14 away from the array substrate. The light-emitting layer may include a pixel defining layer 15 and multiple light-emitting units. The pixel defining layer 15 has multiple pixel openings 151. The multiple light-emitting units are respectively disposed within different pixel openings 151. Each light-emitting unit may include a first electrode 121, a light-emitting element 122, and a second electrode 123. The first electrode 121 is located on the surface of the first planarization layer 13 or the second planarization layer 14 away from the base substrate 10. The light-emitting element 122 is disposed on the surface of the first electrode 121 away from the base substrate 10. The second electrode 123 is disposed on the surface of the light-emitting element 122 away from the base substrate 10. The first electrode 121 and the second electrode 123 can be used to drive the light-emitting layer 12 to emit light to display an image.

[0079] The first electrode 121 is connected to the first source electrode 115 or the second source electrode 117. A pixel defining layer 15 is provided on the side of the first electrode 121 away from the substrate 10. When the thin film transistor includes only the first source electrode 115, the first electrode 121 is connected to the first source electrode 115, and the pixel defining layer 15 covers the first electrode 121 and the first planarization layer 13. When the thin film transistor also includes the second source electrode 117, the first electrode 121 is connected to the second source electrode 117, and the pixel defining layer 15 covers the first electrode 121 and the second planarization layer 14.

[0080] The second electrode 123 can serve as a cathode, and the first electrode 121 can serve as an anode. The light-emitting element 122 can be driven to emit light by applying a signal to the first electrode 121. The specific light-emitting principle will not be described in detail here. The light-emitting element 122 may include an electro-induced organic light-emitting material and may be formed by a process such as evaporation. For example, the light-emitting element 122 may include a hole injection layer, a hole transport layer, a light generating layer, an electron transport layer, and an electron injection layer sequentially stacked on the first electrode 121 layer. It should be noted that the light-emitting element 122 may include a red light-emitting element, a green light-emitting element, and a blue light-emitting element depending on the color of the light emitted.

[0081] The display panel of the present disclosure may also include an encapsulation layer 16, which may be disposed on the light-emitting unit. Encapsulation layer 16 is disposed on the side of light-emitting layer 12 away from substrate 10, thereby encapsulating the light-emitting layer and protecting it from water and oxygen corrosion. Encapsulation layer 16 may be a single-layer or multi-layer structure, and its material may include organic or inorganic materials, without particular limitation.

[0082] In this embodiment, the encapsulation layer 16 may include a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer. The first inorganic encapsulation layer is arranged on the side of the light-emitting layer 12 away from the base substrate 10, the organic encapsulation layer is arranged on the side of the first inorganic encapsulation layer away from the base substrate 10, and the second inorganic encapsulation layer is arranged on the side of the organic encapsulation layer away from the base substrate 10.

[0083] The display area 1 also includes a touch control layer 18, which can utilize mutual capacitance touch control. The touch control layer 18 comprises a first sub-touch control layer 181 and a second sub-touch control layer 182. The first sub-touch control layer 181 is a metal mesh layer (MM), and the second sub-touch control layer 182 is a bridge metal layer (BM). A first insulating layer 183 is provided on the side of the first sub-touch control layer 181 facing away from the base substrate 10, and a second insulating layer 184 is provided on the side of the second sub-touch control layer 182 facing away from the base substrate 10. A protective layer 19 may also be provided on the side of the second insulating layer 184 facing away from the base substrate 10.

[0084] Because the liquid organic encapsulating material flows, it is prone to overflow. To prevent this, especially at the lower frame, a weir 20 has been installed in the non-display area, away from the display area, to prevent it from overflowing. The cross-sectional shape of the weir 20 can be rectangular as shown in the figure, or it can be trapezoidal. The weir 20 has at least one inclined side near the display area, which is not limited here.

[0085] The dam 20 is arranged around the display area 1, and the stacked pattern of the dam 20 includes at least one filling layer, and the filling layer is provided with the same material as one or more layers of the first planarization layer 13, the second planarization layer 14, and the pixel definition layer 15. In this embodiment, the stacked pattern of the dam 20 may include a first filling layer 201, and the first filling layer 201 is provided with the same layer and material as the first planarization layer 13. A second filling layer 202 may also be provided on the first filling layer 201, and the second filling layer 202 is provided with the same layer and material as the second planarization layer 14. A third filling layer 203 may also be provided on the second filling layer 202, and the third filling layer 203 is provided with the same layer and material as the pixel definition layer 15. The side of the dam 20 away from the base substrate 10 is provided with an encapsulation layer 16, a first insulating layer 183, and a second insulating layer 184 in sequence.

[0086] A first lead can be provided in the non-display area 102 between the bank 20 and the display area, on the side of the encapsulation layer 16 away from the base substrate 11. The orthographic projection of the second lead 23 on the base substrate is located on the side of the orthographic projection of the first lead 21 on the base substrate away from the display area. If the second lead 23 is provided on the side of the first lead closer to the display area, it will affect touch and display. The first lead 21 is used to input a first signal, and the second lead 23 is used to input a second signal.

[0087] The first lead 21 can be a touch signal line, and the touch signal line may include: a first sub-lead 211 arranged on the same layer as the metal mesh layer MM, and a second sub-lead 212 arranged on the same layer as the bridging metal layer BM and electrically connected to the first sub-lead 211, a third insulating layer 213 is provided between the second sub-lead 212 and the first sub-lead 211, and the third insulating layer 213 is provided on the same layer and material as the first insulating layer, and a fourth insulating layer 214 is provided on the side of the second sub-lead 212 away from the base substrate, and the fourth insulating layer 214 is provided on the same layer and material as the second insulating layer.

[0088] By configuring the touch signal line 185 as a double-layer routing consisting of a first sub-lead 211 and a second sub-lead 212, even if one layer of routing is partially broken, the touch signal can still be applied to the metal mesh layer MM through the other layer of routing, effectively solving the problem of touch failure caused by a single-layer routing break. Furthermore, compared to a single-layer routing design, a double-layer routing can also reduce the resistance of the touch signal line 185. In a specific implementation, the first sub-lead 211 and the second sub-lead 212 are electrically connected via a via that penetrates the inorganic insulating layer.

[0089] The second lead 23 can be provided in the same layer as at least one of the first sub-touch control layer and the second sub-touch control layer.

[0090] As shown in Figures 3 and 4 , the second lead 23 can also be provided in the same layer and material as the gate. The touch display module includes a first gate 1131 and a second gate 1132. The first sub-signal segment 2311 can be provided in the same layer and material as the first gate 1131, and the second sub-signal segment 2312 can be provided in the same layer and material as the second gate 1132. The second sub-signal segment 2312 is connected to the first sub-signal segment 2311 through a via.

[0091] Because gate lines and data lines (not shown) are typically disposed on the side of the non-display region that is close to or far from the display area, the gate lines are typically provided in the same layer and material as the first gate electrode 1131 or the second gate electrode 1132, and the data lines are typically provided in the same layer and material as the first source electrode 115 and the drain electrode 116. Both the gate lines and the data lines are located on the side of the touch control layer that is close to the base substrate. Therefore, a second planarization layer group is also provided in the non-display region 2. The second planarization layer group is provided on the side of the interlayer dielectric layer 114 that is far from the base substrate. The second planarization layer group makes the side of the gate lines and the data lines that is far from the base substrate 10 flat, allowing the first leads 21 to be evenly arranged on a flat surface, thereby preventing short circuits between multiple first leads 21.

[0092] The second planarization layer group may include a third planarization layer 22, which is arranged in the same layer and material as the interlayer dielectric layer 114. The second planarization layer group may further include a fourth planarization layer, which (not shown in the figure) may be arranged in the same layer and material as the second planarization layer 14. The second planarization layer group may further include a fifth planarization layer (not shown in the figure), which may be arranged in the same layer and material as the pixel defining layer.

[0093] An encapsulation layer 16 and a third insulating layer 213 can be provided on the side of the second planarization layer group away from the base substrate 10. Specifically, the third insulating layer 213 can be provided on the side of the encapsulation layer 16 away from the base substrate 10, and the encapsulation layer 16 can be provided on the side of the third planarization layer 22 away from the base substrate. A fourth insulating layer 214 can be provided in the non-display area 2 on the side of the second sub-touch lead and the second sub-signal segment 2312 away from the base substrate 10. The first lead 21 and the second lead 23 are insulated by the third insulating layer 213 and the fourth insulating layer 214, respectively.

[0094] In addition, the non-display area 2 also includes a buffer layer 17. It should be understood that other essential components of the display substrate are well understood by those skilled in the art and are not described in detail herein and should not be construed as limiting the present disclosure.

[0095] As shown in Figures 5 and 6, the following description will take the first sub-touch control layer 181 as a metal mesh layer (Metal Mesh, MM) and the second sub-touch control layer 182 as a bridge metal layer (Bridge Metal, BM). The first sub-touch control layer 181 is located in the display area 101 and can be divided into a first touch electrode and a second touch electrode according to the horizontal and vertical directions. The first touch electrode is arranged along the first direction, and the second touch electrode is arranged along the second direction. The first direction is the y direction in Figure 5, and the y direction is perpendicular to the x direction. The first touch electrode is a touch drive (Tx) metal mesh, and the second touch electrode is a touch sense (Rx) metal mesh. One of the first touch electrode and the second touch electrode is connected to each other, and the other is connected through the second sub-touch control layer 182. A plurality of first leads are electrically connected to the first touch electrode and the second touch electrode, respectively.

[0096] The first lead 21 can be located on the side of the dam 20 closest to the display area, with the second lead 23 located between the dam 20 and the first lead 21. As shown in Figures 7 and 8, the first lead 21 can also be located on the side of the dam 20 farther from the display area. The second lead 23 is parallel to the first lead 21, ensuring that the second signal is completely opposite to the first signal. The second lead 23 can be positioned adjacent to the first lead 21, significantly reducing the electromagnetic interference (EMI) radiation generated by the first signal, thereby reducing EMI radiation from the entire touch display module.

[0097] As shown in Figure 9, the non-display area also includes a binding area, and the first lead 21 and the second lead 23 converge to the binding area of ​​the touch display module, are connected to the touch driver board through a chip-on-film (COF) or a flexible film carrier, and are finally connected to the binding pin 26 of the touch driver chip 4. The touch driver chip 4 has multiple binding pins 26, and the binding pins 26 can be divided into touch binding pins and other binding pins. The first lead 21 is bound to the touch binding pin, and the second lead 23 can be bound to an idle touch binding pin, or can be bound to other idle binding pins. The signal of the binding pin of the touch driver chip 4 can be controlled by the controller 5.

[0098] As shown in Figure 10, if two adjacent wires carry currents of equal magnitude and opposite directions, the magnetic lines of force they generate can cancel each other out. The adjacent wires can be the first lead 21 and the second lead 23. Electromagnetic simulation was performed on each trace in the non-display area, including the first lead 21, the first ground wire 241, and the second lead 23. The simulation calculated the intensity of electromagnetic interference radiation from the first lead 21 when a first signal was applied to the first lead 21 under the driving frequency and driving voltage of the touch driver chip 4, and the intensity of reverse electromagnetic interference radiation from the second lead 23 when a second signal of different amplitude and opposite phase was applied to the second lead 23.

[0099] The second lead 23 is required to minimize and counteract the electromagnetic interference radiation from the corresponding first lead 21 region. This ensures that the optimal voltage amplitude or current intensity of the second signal applied to the second lead 23 is achieved, minimizing the electromagnetic interference radiation from the entire touch display module. The above simulations demonstrate the voltage amplitude or current intensity of the second signal that minimizes electromagnetic interference radiation from the touch display module.

[0100] A first signal is input via a binding pin 26 connected to the first lead 21, and a second signal is input via a binding pin 26 connected to the second lead 23. The second signal is of the same frequency and in the opposite direction to the first signal. As shown in Figure 4, the voltage amplitude of the second signal can be set and adjusted by the touch driver chip 4. The current or voltage of the second signal is the optimal voltage amplitude or current intensity obtained through simulation. The radiated magnetic lines of force generated by the second signal are in the opposite direction to those generated by the first signal, thereby reducing the touch electromagnetic interference radiation of the touch structure of the touch display device.

[0101] As shown in Figure 11, compared to the first lead 21, the second lead 23 has a wider line width and relatively lower impedance. Compared to the first signal on the first lead 21, the second signal on the second lead 23 has an opposite phase, the same voltage amplitude, and a higher current. However, the touch driver chip 4 has limited driving capabilities, and may still not be able to significantly reduce the electromagnetic interference radiation of a large number of first leads 21.

[0102] As shown in FIG12 , the touch display module further includes a signal amplifying module 3 . The signal amplifying module 3 is disposed on the touch driving board. The amplifying module is a voltage amplifying module or a current amplifying module, such as a voltage feedback amplifier or a current feedback amplifier.

[0103] As shown in FIG13 , the input end of the signal amplification module 3 is connected to the binding pin 26 of the touch driver chip 4. The input end of the signal amplification module 3 is used to input the second signal, and the output end of the signal amplification module 3 is connected to the first lead 21. The signal amplification module 3 is used to amplify the current or voltage of the second signal. The second signal amplified by the signal amplification module 3 is still in the same frequency and opposite direction as the first signal. The current or voltage of the second signal is the optimal voltage amplitude or current intensity obtained by simulation.

[0104] The signal amplifying module 3 outputs the amplified second signal to the binding pin 26 of the touch display panel. The second lead 23 radiates the amplified magnetic field lines in the opposite direction to weaken the touch electromagnetic interference radiation of the touch structure of the touch display device.

[0105] The first signal is transmitted in a self-capacitance phase and a mutual-capacitance phase. The self-capacitance phase refers to the non-touch driving period of the touch display module, and the mutual-capacitance phase refers to the touch driving period of the touch display module. As shown in Figure 14, the output end of the 0Ω resistor is always connected to the second lead 23. The input end of the 0Ω resistor in the self-capacitance phase is connected to the ground wire. The second lead 23 inputs a reference signal, and the voltage of the reference signal is less than the voltage of the second signal. As shown in Figure 15, the input end of the 0Ω resistor in the mutual-capacitance phase is connected to the touch driver chip 4. The touch driver chip 4 inputs a second signal that is a mirror image of the first signal to the second lead 23, thereby weakening the electromagnetic interference radiation generated by the first signal.

[0106] The width of the second lead 23 is 30um-200um. Preferably, the width of the second lead 23 is greater than or equal to 100μm. As shown in Figure 16, the second lead 23 includes a signal segment 231 and a binding segment 232 connected in sequence. The signal segment 231 is parallel to the cofferdam 20, and the binding segment 232 usually intersects with the extension direction of the cofferdam 20, and can also be perpendicular to the extension direction of the cofferdam 20. The width of the signal segment 231 is greater than the width of the binding segment 232. In order to facilitate the provision of enough binding pins 26 in the binding area, the width of the binding segment 232 is usually reduced, but this can easily lead to electrostatic discharge (ESD) problems. In order to reduce or avoid the problem of electrostatic discharge, the ratio of the width of the signal segment 231 to the width of the binding segment 232 is between 1-10. In this embodiment, the ratio of the width of the signal segment 231 to the width of the binding segment 232 can be 3 or 4.

[0107] As shown in Figures 17 and 18 , the touch display module may further include a first ground line 241. The orthographic projection of the first ground line 241 on the substrate is located between the orthographic projections of the second lead 23 and the first lead 21 on the substrate. The first ground line 241 is used to input a reference signal. It should be noted that the first ground line 241 can isolate and shield external noise.

[0108] As shown in Figure 19, the signal segment 231 can be disconnected at the edge or corner of the non-display area, and the second lead 23 can be divided into two or more sub-second lead segments 233, avoiding the deflection effect caused by the second lead 23 forming a loop, which interferes with and affects the first lead 21.

[0109] As shown in Figure 20, there are multiple second leads 23. As shown in Figure 21, the touch display module also includes an adapter cable 25, which can include a main line segment 251 and a branch line segment 252. The main line segment 251 is provided as a single segment, and the number of branch line segments 252 is the same as the number of second leads 23. One end of each branch line segment 252 is connected to the main line segment 251, and the other end is connected to a first lead 21 through a via. The branch line segment 252 near the display area can be connected to the second lead 23 far from the display area, and the branch line segment 252 far from the display area can be connected to the second lead 23 near the display area.

[0110] As shown in Figure 21, in order to prevent static electricity accumulation in long traces, the signal segment 231 can be set to two sections, a first sub-signal segment 2311 and a second sub-signal segment 2312. The second sub-signal segment 2312 is located at both ends of the first sub-signal segment 2311, the first sub-signal segment 2311 is located in the first sub-touch control layer, the second sub-signal segment 2312 is located in the second sub-touch control layer, and the second sub-signal segment 2312 is connected to the first sub-signal segment 2311 through vias.

[0111] As shown in FIG. 22 and FIG. 23 , the touch display module further includes a second grounding line 242 . The orthographic projection of the second grounding line 242 on the base substrate 10 is located on a side of the orthographic projection of the second lead 23 on the base substrate 10 away from the display area 1 .

[0112] To further reduce electromagnetic interference radiation, consider reducing the current of the first signal as much as possible. The current of the first signal can be calculated using the empirical formula I = Delta Cm / Cptx / Cprx, where I represents the current of the first signal, Delta Cm represents the change in capacitance, Cptx represents the capacitance between the first touch electrode and the cathode, and Cprx represents the capacitance between the second touch electrode and the cathode. It should be noted that the first touch electrode here is the touch drive electrode, and the second touch electrode is the touch sensing electrode.

[0113] The film layers above the automotive touchscreen structure are relatively thick, including the polarizing layer, adhesive layer, and cover plate. This results in a low touch signal sensed by the touchscreen structure. Furthermore, considering the need to wear gloves when using touchscreens, the signal strength is even lower. Automotive touchscreen display panels are relatively large, typically ranging from 13 to 20 inches. Existing touch driver chips have a 4-inch design and lack the ability to support more channels. To improve touch sensitivity, the touchscreen unit must be increased in size.

[0114] The increased size of the touch unit increases the area of ​​the first and second touch electrodes in a single touch unit, increasing the capacitance between the first touch electrode and the cathode, the capacitance between the second touch electrode and the cathode, and the RC loading of the touch unit. Therefore, it is necessary to consider reducing the areas of the first and second touch electrodes to reduce Cptx and Cprx. However, reducing the areas of the first and second touch electrodes is not conducive to increasing the capacitance variation and ensuring touch accuracy.

[0115] Based on this, the embodiment of the present disclosure also provides a touch display module. As shown in Figures 24 to 26, the touch display module is applied to a vehicle-mounted display device. The touch display module includes a substrate, a touch control layer, a first lead 21 and a second lead 23. The first lead 21 is provided on one side of the substrate and is located in the non-display area. The first lead 21 is used to input a first signal; the second lead 23 is the positive projection of the second lead 23 on the substrate, and is located on the side of the positive projection of the first lead 21 on the substrate away from the display area. The second lead 23 is used to input a second signal. The second signal is in the same frequency and opposite to the first signal. The touch control layer includes a touch control layer. The touch unit includes a plurality of sub-touch units 185 arranged in an array, and the sub-touch unit 185 includes a first touch electrode portion 1851 and a second touch electrode portion 1852. One of the first touch electrode portion 1851 and the second touch electrode portion 1852 is connected to each other, and the other is connected through a bridging layer. The plurality of first touch electrode portions 1851 located on the same straight line constitute a first touch electrode, and the plurality of first touch electrode portions 1851 located on the same straight line constitute a second touch electrode. The first touch electrode and the second touch electrode are respectively connected to a first lead 21.

[0116] The touch control layer includes a plurality of sub-touch units 185 arranged in an array, the first touch electrode is composed of a plurality of first touch electrode parts 1851, and the second touch electrode is composed of a plurality of second touch electrode parts 1852. The first touch electrode and the second touch electrode have high uniformity, which can balance the change in capacitance value, the capacitance value between the first touch electrode part 1851 and the cathode, and the capacitance value between the second touch electrode part 1852 and the cathode, so that the current of the first signal can be reduced without affecting the touch accuracy too much. On the basis of the above-mentioned touch display module, electromagnetic interference radiation can be further reduced.

[0117] The touch display module according to the embodiment of the present disclosure will be described below with reference to specific examples.

[0118] The touch control layer 18 can be a mutual-capacitive touch control layer. It includes a first sub-touch control layer 181 and a second sub-touch control layer 182. The first sub-touch control layer 181 is a metal mesh layer (MM), and the second sub-touch control layer 182 is a bridge metal layer (BM). The metal mesh is located in the display area and can be divided into a touch drive (Tx) metal mesh and a touch sense (Rx) metal mesh based on the horizontal and vertical directions.

[0119] The touch control layer 18 includes a plurality of sub-touch units 185 arranged in an array. The sub-touch unit 185 includes a first touch electrode portion 1851 and a second touch electrode portion 1852. One of the first touch electrode portion 1851 and the second touch electrode portion 1852 is connected to each other, and the other is connected through a bridging layer. A plurality of first touch electrode portions 1851 located on the same straight line constitute a first touch electrode, and a plurality of first touch electrode portions 1851 located on the same straight line constitute a second touch electrode. The first touch electrode and the second touch electrode are respectively connected to a first lead 21.

[0120] The first touch electrode portion 1851 and the second touch electrode portion 1852 form a grid of electrode lines. The touch display module includes multiple sub-pixels. The electrode lines of the first touch electrode portion 1851 and the electrode lines of the second touch electrode portion 1852 are located between adjacent sub-pixels. The electrode lines of the first touch electrode portion 1851 and the electrode lines of the second touch electrode portion 1852 are the same distance from adjacent sub-pixels to prevent interference with the light emission of the touch display module.

[0121] Each first touch electrode portion 1851 has a first trunk portion 1853, and each second touch electrode portion 1852 has a second trunk portion 1856. The orthographic projection of the first trunk portion 1853 on the substrate overlaps with the orthographic projection of the second trunk portion 1856 on the substrate, and the overlap is located at the center of the sub-touch unit 185. The first touch electrode portion 1851 and the second touch electrode portion 1852 are mated via an interdigital structure. The interdigital structure includes a first interdigital portion 1855 provided on the first touch electrode portion 1851 and a second interdigital portion 1858 provided on the second touch electrode portion 1852. The first interdigital portion 1855 and the second interdigital portion 1858 are insulated and arranged in the same layer and nested with each other.

[0122] The first touch electrode portion 1851 includes a first trunk portion 1853, a first connecting portion 1854, and a plurality of first interdigital portions 1855. The first connecting portion 1854 is connected to the first trunk portion 1853 and extends outward in a direction perpendicular to the first trunk portion 1853. The plurality of first interdigital portions 1855 is connected to the first connecting portion 1854 and extends outward in a direction intersecting the first trunk portion 1853. The second touch electrode portion 1852 includes a second trunk portion 1856, a second connecting portion 1857, and a plurality of second interdigital portions 1858. The second connecting portion 1857 is connected to the second trunk portion 1856 and extends outward in a direction perpendicular to the second trunk portion 1856. The plurality of second interdigital portions 1858 is connected to the second connecting portion 1857 and extends outward in a direction intersecting the second trunk portion 1856. The first trunk portion 1853 and the second trunk portion 1856 overlap in a cross shape at the center of each sub-touch unit 185.

[0123] As shown in Figure 24, the touch control layer can include a first type of touch unit. The size of the first type of touch unit is 4.0mm to 5.5mm. The width of the electrode lines of the first sub-touch control layer 181 and the width of the electrode lines of the second sub-touch control layer 182 are 3-4μm. The touch unit can be equally divided into nine identical sub-touch units 185 with the center at the touch control unit. Each sub-touch unit 185 includes a first touch electrode portion 1851, a second touch electrode portion 1852, and a bridge portion. The first touch electrode portion 1851 and the second touch electrode portion 1852 can be located in the first sub-touch control layer 181, and the bridge portion can be located in the second sub-touch control layer 182. The bridge portion includes two channels.

[0124] The first touch electrode portion 1851 includes a first main body 1853 arranged along a first direction and a plurality of first interdigital portions 1855, and a plurality of first interdigital portions 1855 are respectively provided on both sides of a first main body 1853. The second touch electrode portion 1852 includes a second main body 1856 arranged along a second direction, two second connecting portions 1857 and a plurality of second interdigital portions 1858, and the two second connecting portions 1857 are connected to a second main body 1856 and extend outward in a direction perpendicular to the second main body 1856. The plurality of second interdigital portions 1858 are connected to the second connecting portion 1857 and extend in a direction perpendicular to the second main body 1856 toward the first main body 1853. The first interdigital portions 1855 and the second interdigital portions 1858 are insulated and arranged in the same layer and nested with each other. The first main portion 1853 and the second main portion 1856 overlap in a cross shape at the center of each sub-touch unit 185 . A small transition region 186 (dummy) exists at the overlapping position, and the width of the transition region 186 is 60-130 μm.

[0125] As shown in Figure 25, the touch control layer may include a second touch unit. The size of the second touch unit is 4.0mm~5.5mm, the width of the electrode line of the first sub-touch control layer 181 and the width of the electrode line of the second sub-touch control layer 182 are 3~4μm, and the touch unit can be equally divided into four completely identical sub-touch units 185 from the center. The first touch electrode portion 1851 of the sub-touch unit 185 includes two first main trunks 1853 arranged parallel to each other along a first direction. A transition region 186 is defined on each of the first trunks 1853. A plurality of first interdigital portions 1855 are located on either side of each of the two first trunks 1853. The second touch electrode portion 1852 includes a second main trunk 1856 arranged along a second direction and a second connecting portion 1857. The second connecting portion 1857 is connected to the second main trunk 1856 and extends outward perpendicularly to the second main trunk 1856. A plurality of second interdigital portions 1858 are located on either side of the second connecting portion 1857. The first interdigital portions 1855 and the second interdigital portions 1858 are insulated from each other and nested within each other. To increase signal strength and meet the requirements for touch control when wearing gloves, the transition region 186 is reduced in width, ranging from 60 to 130 μm.

[0126] As shown in Figure 26, the touch control layer can be set to a third touch unit, the size of the third touch pattern is 4.0mm~5.5mm, the width of the electrode line of the first sub-touch control layer 181 and the width of the electrode line of the second sub-touch control layer 182 are 3~4μm, and the touch unit can be equally divided into four completely identical sub-touch units 185 from the center. The first touch electrode portion 1851 of the sub-touch unit 185 includes a first main body 1853 arranged along a first direction, a first connecting portion 1854 and a plurality of first interdigital portions 1855, wherein the first connecting portion 1854 is connected to the first main body 1853 and extends in a direction perpendicular to the first main body 1853, and a plurality of first interdigital portions 1855 are respectively provided on both sides of the two first connecting portions 1854, and the second touch electrode portion 1852 includes a second main body 1856 arranged along a second direction and two second connecting portions 1857, wherein the two second connecting portions 1857 are connected to the second main body 1856 and extend in a direction perpendicular to the second main body 1856, and a plurality of second interdigital portions 1858 are respectively provided on both sides of the second main body 1856, and the first interdigital portions 1855 and the second interdigital portions 1858 are arranged in the same layer of insulation and nested with each other. Second connecting portion 1857 has second mating portions 1859 at both ends, nested with first interdigital portions 1855 outside first connecting portion 1854. A large transition region 186 is located within second touch electrode portion 1852, with transition regions 186 of various shapes evenly distributed elsewhere.

[0127] Comparing the first and second touch units, the capacitance change (Delta Cm) for pure finger touch increased by 59.8%, from 0.106 picofarads (PF) to 0.1694 PF. This indicates that both touch units meet the requirements for finger touch. The capacitance change for glove touch increased from 0.04 PF to 0.087 PF, indicating that the second touch unit outperformed the first when using gloves. The capacitance of all first touch electrodes (Total Cptx) increased by 55.3% from 505.38 PF to 784.67 PF, while the capacitance of all second touch electrodes (Total Cprx) increased by 19.6% from 471.76 PF to 564.12 PF. This indicates that the second touch unit is closer to the limits of the touch driver chip. The resistance of the first touch electrode increased by 35.4% from 13.81 ohms to 18.7 ohms, while the resistance of the second touch electrode increased by 36.7% from 11.63 to 15.9, indicating that the first touch unit has a lower resistance. The proportion of transition region 186 decreased significantly from 36.45% to 8.4%. Meanwhile, the capacitance when touching with gloves increased by 66.9% from 1.029 pF to 1.717 pF. The second touch unit faces a higher risk of melting points at high and low temperatures, placing greater pressure on the control of touch driver chip 4.

[0128] Comparing the first and third touch units, the capacitance values ​​under pure finger touch are 1.029 picofarads and 1.026 picofarads, respectively. The capacitance changes under pure finger touch are 0.106 picofarads and 0.082 picofarads, respectively, showing a relatively small difference. The capacitance of all first touch electrodes increases by 32.4% from 505.38 picofarads to 668.94 picofarads, while the capacitance of all second touch electrodes decreases by 3.2% from 471.76 to 457.08. This indicates that the touch driver chip of the first touch unit has wider applicability. The resistance of the first touch electrode increases by 21.9% from 13.81 ohms to 16.83 ohms, while the resistance of the second touch electrode increases by 75.2% from 11.63 ohms to 20.38 ohms, indicating that the overall resistance of the first touch unit is lower. The transition region 186 accounts for 36.45% and 34%, respectively, showing a relatively small difference.

[0129] In summary, compared to the second and third touch control units, the first touch control unit is more capable of balancing the relationship between the capacitance change, the capacitance between the first touch electrode and the cathode, and the capacitance between the second touch electrode and the cathode. This ensures touch accuracy for the in-vehicle display device while minimizing RC loading. A touch control unit should include as many sub-touch control units 185 as possible.

[0130] The present disclosure also provides a touch display device. The touch display device may include the touch display module of any of the above embodiments of the present disclosure. The specific structure and beneficial effects of the touch display module have been described in detail above and will not be repeated here.

[0131] It should be noted that, in addition to the touch display module, the touch display device also includes other necessary components and components, such as circuit boards, power cords, etc. Those skilled in the art can make corresponding supplements based on the specific usage requirements of the display device, which will not be repeated here.

[0132] The present disclosure also provides an electronic device including any of the touch display devices of the disclosed embodiments. The electronic device can be a conventional electronic device such as a mobile phone, a computer, a television, and a camcorder, or an in-vehicle electronic device, which are not listed here.

[0133] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A touch display module, comprising a display area and a non-display area connected to the display area, wherein: The touch display module comprises: substrate substrate; A first lead line is provided at one side of the base substrate and is located in the non-display area, and the first lead line is used to input a first signal; A second lead, the orthographic projection of the second lead on the base substrate is located on a side of the orthographic projection of the first lead on the base substrate away from the display area, and the second lead is used to input a second signal, which has the same frequency and opposite direction as the first signal.

2. The touch display module according to claim 1, wherein: During the non-touch driving period, the second lead line inputs a reference signal.

3. The touch display module according to claim 1, wherein: The second lead is disposed adjacent to the first lead, and the second lead is parallel to the first lead.

4. The touch display module according to claim 1, wherein: The touch display module also includes a first grounding line, the orthographic projection of the first grounding line on the base substrate is located between the orthographic projection of the second lead on the base substrate and the orthographic projection of the first lead on the base substrate, and the first grounding line is used to input a reference signal.

5. The touch display module according to claim 1, wherein: A dam away from the display area is provided in the non-display area, and the second lead is located at a side of the dam away from the display area or a side of the dam close to the display area.

6. The touch display module according to claim 5, wherein: The second lead includes a signal segment and a binding segment connected in sequence, the signal segment is parallel to the cofferdam, the binding segment is perpendicular to the cofferdam, and the width of the signal segment is greater than the width of the binding segment.

7. The touch display module according to claim 6, wherein: The ratio of the width of the signal segment to the width of the binding segment is 1-10.

8. The touch display module according to claim 1, wherein: There are a plurality of second lead wires, and the touch display module further includes adapter wires, which are respectively connected to the plurality of first lead wires through via holes.

9. The touch display module according to claim 6, wherein: The touch display module also includes a touch control layer, which includes a first sub-touch control layer and a second sub-touch control layer. The first sub-touch control layer and the second sub-touch control layer are insulated from each other, and the second lead is arranged on the same layer as at least one of the first sub-touch control layer and the second sub-touch control layer.

10. The touch display module according to claim 9, wherein: The signal segment includes a first sub-signal segment and a second sub-signal segment located at both ends of the first sub-signal segment, the first sub-signal segment is located in the first sub-touch control layer, the second sub-signal segment is located in the second sub-touch control layer, and the second sub-signal segment is connected to the first sub-signal segment through a via.

11. The touch display module according to claim 1, wherein: The width of the second lead is 30um-200um.

12. The touch display module according to claim 6, wherein: The signal segment is disconnected at an edge or a corner of the non-display area.

13. The touch display module according to claim 1, wherein: The non-display area further includes a binding area, the binding area is provided with binding pins, and the first lead and the second lead are bound to the binding pins.

14. The touch display module according to claim 1, wherein: The touch display module further includes a signal amplifying module, an input end of the signal amplifying module is used to input a second signal, and an output end of the signal amplifying module is connected to the first lead.

15. The touch display module according to claim 14, wherein: The amplification module is a voltage amplification module or a current amplification module.

16. The touch display module according to claim 1, wherein: The touch display module further includes a second grounding line, wherein the orthographic projection of the second grounding line on the base substrate is located on a side of the orthographic projection of the second lead on the base substrate away from the display area.

17. The touch display module according to claim 9, wherein: The first touch control sub-layer includes a first touch electrode and a second touch electrode, the first lead includes a touch drive lead and / or a touch sensing lead, and the first touch electrode and the second touch electrode are respectively connected to one of the touch drive lead and the touch sensing lead.

18. A touch display module, wherein: Applied to a vehicle-mounted display device, the touch display module comprises: substrate substrate; The first lead is provided on one side of the base substrate and is located in the non-display area. The lead is used to input a first signal; a second lead, the orthographic projection of the second lead on the base substrate is located on a side of the orthographic projection of the first lead on the base substrate away from the display area, the second lead is used to input a second signal, the second signal has the same frequency and is in the opposite direction to the first signal; A touch control layer, wherein the touch control layer includes a plurality of touch control units, wherein the touch control unit includes sub-touch control units arranged in an array, wherein the sub-touch control unit includes a first touch control electrode portion and a second touch control electrode portion, wherein one of the first touch control electrode portion and the second touch control electrode portion is connected to each other, and the other is connected through a bridging layer, wherein a plurality of the first touch control electrode portions located on the same straight line constitute a first touch control electrode, and a plurality of the second touch control electrode portions located on the same straight line constitute a second touch control electrode, and the first touch electrode and the second touch electrode are respectively connected to one of the first leads.

19. The touch display module according to claim 18, wherein: Each of the first touch electrode portions has a first main body portion, and each of the second touch electrode portions has a second main body portion. The orthographic projection of the first main body portion on the base substrate and the orthographic projection of the second main body portion on the base substrate form an overlapping position, and the overlapping position is located at the center of the sub-touch unit.

20. The touch display module according to claim 18, wherein: The first touch electrode portion and the second touch electrode portion are matched with each other through an interdigitation structure.

21. The touch display module according to claim 20, characterized in that: The interdigitated finger structure includes a first interdigitated finger portion provided on the first touch electrode portion and a second interdigitated finger portion provided on the second touch electrode portion. The first interdigitated finger portion and the second interdigitated finger portion are insulated in the same layer and are nested with each other.

22. The touch display module according to claim 18, characterized in that: The first touch electrode portion and the second touch electrode portion are grid-shaped electrode lines, the touch display module includes a plurality of sub-pixels, and the electrode lines of the first touch electrodes are arranged between adjacent sub-pixels and the electrode lines of the second touch electrodes are arranged between adjacent sub-pixels.

23. The touch display module according to claim 25, characterized in that: The electrode lines of the first touch electrode portion and the electrode lines of the second touch electrode portion are at the same distance from the adjacent sub-pixels.

24. A touch display device, wherein: Comprising the touch display module as described in claim 1 or 18.

25. An electronic device, wherein: Includes the touch display device as claimed in claim 24.

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