Touch display module and display device

Abstract

The present invention discloses a touch display module and a display device, wherein the touch display module includes a display panel and a touch display integrated chip, the touch display integrated chip includes a plurality of first pads, x dummy pads and a plurality of second pads, the display area of ​​the display panel includes m first touch electrodes arranged along a first direction and extending along a second direction, and n second touch electrodes arranged along the second direction and extending along the first direction, the non-display area of ​​the display panel also includes a first touch lead, a second touch lead, a first touch pin and a second touch pin, wherein the first touch electrode is connected to the touch screen through the first touch lead. The control lead is electrically connected to the first touch pin and the first pad, and the second touch electrode is electrically connected to the second touch pin and the second pad through the second touch lead; in the touch display module provided by the present invention, the number of dummy pads x is set between 0.5n+a and m+0.5n+b, which can not only improve the compatibility and adaptability of the touch display integrated chip with different display panels and reduce the development cost of the touch display integrated chip, but also the dummy pads can reduce the coupling between different touch signals or different display drive signals, improve the reliability of signal transmission, and improve the touch performance and display performance.

Description

Technical Field

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

[0002] With the continuous advancement of display technology, touch display modules have become widely used in people's daily lives and production. Touch display modules combine display and touch sensing functions, leading to significant development of driver ICs and touch ICs. Currently, to reduce costs, both driver ICs are integrated into a single touch and display driver integration (TDDI) chip. This TDDI drives a display panel equipped with a touch sensor to perform both display and touch sensing operations. However, existing touch display modules still face several technical challenges that need to be addressed. Summary of the Invention

[0003] In view of this, the embodiment of the present application provides a touch display module and a display device. The touch display module can improve the compatibility and adaptability of the touch display driver chip with different display panels.

[0004] At the same time, it can also improve touch performance, reduce coupling interference between different touch signals or display drive signals, and improve the yield of touch display modules.

[0005] On the one hand, according to an embodiment of the present application, a touch display module is proposed, comprising a display panel,

[0006] The display panel includes a display area and a non-display area, the display area includes m first touch electrodes arranged along a first direction and extending along a second direction, and n second touch electrodes arranged along a second direction and extending along the first direction, the first direction intersects with the second direction; the non-display area includes a plurality of first touch leads, a plurality of second touch leads and a binding area, the binding area includes at least a plurality of first touch pins, a plurality of second touch pins and a plurality of display drive pins, the first touch lead is electrically connected to the first touch electrode, and the first touch lead extends to the binding area and is electrically connected to the corresponding first touch pin in the binding area, the second touch lead is electrically connected to the second touch electrode, and the second touch lead extends to the binding area and is electrically connected to the corresponding second touch pin in the binding area; the display panel also includes a plurality of display drive signal lines, the display drive signal lines are electrically connected to the display The pixel circuits in the area are electrically connected, and the display drive signal line extends to the binding area and is electrically connected to the corresponding display drive pins in the binding area; the touch display module also includes a touch display integrated chip, the touch display integrated chip includes multiple first pads, x dummy pads, multiple display drive pads and multiple second pads, in the binding area, the first touch pin is electrically connected to the first pad, the second touch pin is electrically connected to the second pad, and the display drive pin is electrically connected to the display drive pad; the touch display integrated chip also includes a first sub-area and a second area, the first sub-area is located on both sides of the second area along the first direction, the display drive pad is located in the second area, the multiple first pads, the multiple dummy pads and the multiple second pads are all located in the first sub-area, 0.5n+a≤x≤m+0.5n+b, x, m and n are all positive integers, and a and b are both integers.

[0007] On the other hand, an embodiment of the present application provides a display device including the touch display module as described above.

[0008] In the touch display module provided by the present invention, the number x of dummy pads in the touch display integrated chip is set to between 0.5n+a and m+0.5n+b. This can improve the compatibility and adaptability of the touch display integrated chip with different display panels. That is, the same touch display integrated chip can be applied to display panels with different numbers of touch leads, reducing the development cost of the touch display integrated chip and thus reducing the cost of the touch display module. Moreover, the dummy pads can also reduce the coupling between different touch signals or different display drive signals, thereby improving touch performance and display performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0010] Figure 1 is a structural diagram of a touch display module provided in some embodiments of the present application;

[0011] Figure 2 yes Figure 1 A schematic cross-sectional structural diagram of the touch display module taken at BB' is shown;

[0012] Figure 3 is a structural diagram of a touch display module provided in some embodiments of the present application;

[0013] Figure 4 is a partial structural diagram of a touch display module provided in some embodiments of the present application;

[0014] Figure 5 is a structural diagram of a touch display module provided in some other embodiments of the present application;

[0015] Figure 6 is a structural diagram of a touch display module provided in some embodiments of the present application;

[0016] Figure 7 is a structural diagram of a touch display module provided in some embodiments of the present application;

[0017] Figure 8 is a structural diagram of a touch display module provided in some embodiments of the present application;

[0018] Figure 9 is a partial structural diagram of a touch display module provided in some embodiments of the present application;

[0019] Figure 10 is a structural diagram of a touch display module provided in some embodiments of the present application;

[0020] Figure 11 is a schematic diagram of a partial cross-sectional structure of a touch display module provided in other embodiments of the present application;

[0021] Figure 12 is a schematic diagram of a partial cross-sectional structure of a touch display module provided in some other embodiments of the present application;

[0022] Figure 13a is a partial structural diagram of a touch display module provided in other embodiments of the present application;

[0023] Figure 13b is a partial structural diagram of a touch display module provided in some other embodiments of the present application;

[0024] Figure 14 This is a schematic diagram of an optional implementation of the display device provided in an embodiment of the present application.

[0025] Description of reference numerals:

[0026] 1. Touch display module; 2. Display device;

[0027] 10. Display panel; 20. Flexible circuit board; 30. Touch display integrated chip;

[0028] 101, substrate 101; 102, array layer; 103, light-emitting layer; 104, encapsulation layer; 105, touch layer

[0029] 111, first touch electrode; 121, second touch electrode; 111a, first touch electrode block; 121a, second touch electrode block

[0030] 211, first touch lead; 221, second touch lead; 231, display drive signal line

[0031] 311, first pad; 321, second pad; 331, display driver pad; 341, dummy pad

[0032] 411, first touch pin; 421, second touch pin; 431, display driver pin; 441, dummy pin;

[0033] 3111, first pad of the first group; 3112, first pad of the second group; 3411, first dummy sub-pad; 3412, second dummy sub-pad

[0034] AA, display area; NA, non-display area; D1, first direction; D2, second direction; BD: bonding area; Q1, first area; Q2, second area; Q11, first sub-area; Q12, second sub-area; ACF: anisotropic conductive adhesive DETAILED DESCRIPTION

[0035] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0036] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0038] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0039] In the description of this specification, it is necessary to understand that the words "substantially", "approximately", "approximately", "about", "roughly", "generally" and the like described in the claims and embodiments of this application refer to what can be generally recognized within a reasonable process operation range or tolerance range, rather than an exact value.

[0040] It should be understood that although the terms first, second, third, etc. may be used to describe winding parts, sub-parts, etc. in the embodiments of the present application, these winding parts, sub-parts, etc. should not be limited to these terms. These terms are only used to distinguish winding parts, sub-parts, etc. from each other. For example, without departing from the scope of the embodiments of the present application, the first winding part may also be referred to as the second winding part, and similarly, the second winding part may also be referred to as the first winding part.

[0041] The applicant in this case has provided a solution to the problems existing in the prior art through careful and in-depth research.

[0042] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 11 The touch display module 1 includes a display panel 10, which includes a display area AA and a non-display area NA, wherein the non-display area NA includes a touch display integrated chip 30 and a flexible circuit board 20, and the touch display integrated chip 30 and the flexible circuit board 20 are used to provide the display panel 10 with the required multiple display driving signals and touch signals.

[0043] The cross-sectional view of the display area AA in the BB' direction is as follows Figure 2As shown, it includes a substrate 101, an array layer 102, a light-emitting layer 103, an encapsulation layer 104 and a touch layer 105. The array layer 102 is located on a side close to the substrate 101, the light-emitting layer 103 is located on a side of the array layer 102 away from the substrate 101, the light-emitting layer 103 includes a plurality of light-emitting devices, the encapsulation layer 104 is located on a side of the light-emitting layer 103 away from the substrate 101, and the touch layer 105 is located on a side of the encapsulation layer 104 away from the substrate 101.

[0044] The array layer 102 is provided with multiple pixel circuits and multiple shift register circuits (not shown). The shift register circuits, under the control of multiple clock signals and multiple constant voltage signals, are used to provide multiple scanning signals and light-emitting control signals to the pixel driver circuits. Under the control of the scanning signals and light-emitting control signals, the data signal lines transmit the corresponding data signals to the multiple pixel circuits in a time-sharing manner and write them to each pixel circuit in a time-sharing manner, so that each pixel circuit can drive the corresponding light-emitting device to emit light of a corresponding brightness level according to the received data signal. The display drive signal lines 231 in the display panel include the data signal lines, clock signal lines, and constant voltage signal lines required by the pixel circuits and shift register circuits. The display drive signal lines 231 can be at least partially located in the non-display area NA. In this application, the specific structures of the pixel circuits and shift register circuits can be referred to relevant technical documents and will not be described in detail in this application.

[0045] The light-emitting layer 103 typically includes a first electrode layer, a second electrode layer, and a light-emitting functional layer and a common layer located therebetween. Because the light-emitting functional layer 103 is very sensitive to oxygen and water vapor, the infiltration of oxygen and water vapor may cause adverse chemical reactions in the organic materials. Therefore, an encapsulation layer 104 is provided on the side of the light-emitting layer 103 in the display panel 10 away from the substrate 101 to ensure that the light-emitting layer 103 is isolated from the influence of water and oxygen. The encapsulation layer 104 generally includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer in a stacked arrangement. A touch layer 105, located on the side of the encapsulation layer 104 away from the substrate 101, is used to implement the touch function of the touch display module.

[0046] That is to say, the various metal film layers, inorganic film layers and organic film layers between the encapsulation layer 104 and the substrate 101 are used to realize the display function of the touch display module 1, and the touch layer 105 is used to realize the touch function of the touch display module 1. The display panel and the touch panel are stacked, and the display area can also be understood as the effective area. The effective area can be both a display area and a touch area.

[0047] Figure 3 This is a structural diagram of a touch display module provided by some embodiments of the present application, with reference to Figure 3The touch layer 105 of the touch display module 1 includes m first touch electrodes 111 arranged along a first direction D1 and extending along a second direction D2, and n second touch electrodes 121 arranged along a second direction D2 and extending along the first direction D1. The first direction D1 intersects the second direction D2. The multiple first touch electrodes 111 are electrically insulated and spaced apart, and the multiple second touch electrodes 121 are also electrically insulated and spaced apart. The first touch electrodes 111 include multiple first touch electrode blocks 111a, and the second touch electrodes 121 include multiple second touch electrode blocks 121a. The multiple first touch electrode blocks 111a and the multiple second touch electrode blocks 121a can be arranged on the same layer and can be formed through the same patterning process. A bridging layer can also be provided to electrically connect two adjacent second touch electrode blocks 121a in the first direction D1 through vias. The first touch electrodes 111 may be driving electrodes, and the corresponding second touch electrodes 121 may be sensing electrodes; or the first touch electrodes 111 may be sensing electrodes, and the corresponding second touch electrodes 121 may be driving electrodes. Figure 3 The example in which the number m of the first touch electrodes 111 is 3 and the number n of the second touch electrodes 121 is 4 is used for illustration and description. This does not represent the actual number of touch electrodes in the present application and is not limited in the present disclosure.

[0048] In some possible embodiments, the first touch electrode block 111a and the second touch electrode block 121a may have a diamond shape, or the first touch electrode block 111a and the second touch electrode block 121a may also have any one or more of a triangle, a square, a trapezoid, a parallelogram, a pentagon, a hexagon and other polygons. The touch electrodes may be self-capacitive touch electrodes or mutual-capacitive touch electrodes, and the present invention does not specifically limit this.

[0049] In some possible embodiments, the first touch electrodes 111 and the second touch electrodes 121 may be transparent electrodes or metal mesh electrodes. The metal mesh is formed by interweaving multiple metal wires. The metal mesh includes multiple mesh patterns. Each mesh pattern is a polygon formed by multiple metal wires. The metal mesh-type first touch electrodes 111 and the second touch electrodes 121 have advantages such as low resistance, small thickness, and fast response speed.

[0050] Continue to refer Figure 1 、 Figure 3 and Figure 11The non-display area NA also includes multiple first touch leads 211 and multiple second touch leads 221, wherein the multiple first touch leads 211 are electrically connected to the multiple first touch electrodes 111 in a one-to-one correspondence, and the first touch leads 211 extend to the binding area BD and are electrically connected to the corresponding first touch pins 411 in the binding area BD, and the multiple second touch leads 221 are electrically connected to the multiple second touch electrodes 121 in a one-to-one correspondence, and the second touch leads 221 extend to the binding area BD and are electrically connected to the corresponding second touch pins 421 in the binding area BD, and the multiple display drive signal lines 231 also extend to the binding area BD and are electrically connected to the corresponding display drive pins 431 in the binding area BD.

[0051] For example, when the touch leads are used for signal transmission of the touch panel, the first touch lead 211 can be a Tx line (Transport, drive channel) or an Rx line (Receive, sensing channel), and the corresponding second touch lead 221 can be an Rx line or a Tx line. When there is one set of Tx lines and one set of Rx lines, it corresponds to an existing 1T1R type touch panel; when there is one set of Tx lines and two sets of Rx lines, it corresponds to an existing 1T2R type touch panel; when there are two sets of Tx lines and one set of Rx lines, it corresponds to an existing 2T1R type touch panel; when there are two sets of Tx lines and two sets of Rx lines, it corresponds to an existing 2T2R type touch panel. Currently, in the prior art, in order to maximize the narrow bezel and improve the reliability of the display panel, the more common touch drive method in display panels is 1T1R or 2T1R.

[0052] The touch display integrated chip 30 includes a plurality of first pads 311, x dummy pads 341, a plurality of display pads 342, and a plurality of display pads 343.

[0053] The display driver pad 331 and the plurality of second pads 321 are shown. Within the bonding area BD, the first touch pin 411 is electrically connected to the first pad 311, the second touch pin 421 is electrically connected to the second pad 321, and the display driver pin 431 is electrically connected to the display driver pad 331. For example, an anisotropic conductive film (ACF) can be disposed between the display panel 10 and the touch display integrated chip 30. The conductive particles in the ACF enable one-to-one conductive connection between the pins on the display panel 10 and the pads on the touch display integrated chip 30.

[0054] refer to Figure 3 and Figure 4The touch display integrated chip 30 includes a first area Q1 and a second area Q2. Along the first direction D1, the first area Q1 is located on both sides of the second area Q2, wherein the display driving pad 331 is located in the second area Q2, multiple first pads 311, multiple dummy pads 341 and multiple second pads 321 are all located in the first area Q1, and 0.5n+a≤x≤m+0.5n+b, x, m and n are all positive integers, and a and b are both integers. By setting the number x of dummy pads 341 to between 0.5n+a and m+0.5n+b, the same touch display integrated chip can be applied to touch display panels with different numbers of touch leads, for example, it can be applied to 1T1R touch display panels as well as 2T1R touch display panels, thereby greatly improving the compatibility and adaptability of the touch display integrated chip with different display panels, reducing the development cost of the touch display integrated chip, and thus reducing the cost of the touch display module. Moreover, the dummy pads 341 can also improve the coupling between different touch signals or different display drive signals, thereby improving touch performance and display performance.

[0055] In addition, the first region Q1 further includes a first sub-region Q11 and a second sub-region Q12, and the first sub-region Q11, the second region Q2, and the second sub-region Q12 are arranged sequentially along the first direction D1. It should be noted that this application only limits the arrangement order of the above three regions. Of course, required areas or structures can be added between the above three regions based on the actual situation of the display panel, and this application does not limit this. The dummy pads 341 located in the first sub-region Q11 are first dummy sub-pads 3411, and the dummy pads 341 located in the second sub-region Q12 are second dummy sub-pads 3412. The number of first dummy sub-pads 3411 is x1, and the number of second dummy sub-pads 3412 is x2, where x1+x2=x, x1 and x2 are both integers, 0≤a≤20, 0≤b≤20. This application also includes the case where x1=0 or x2=0, that is, all dummy pads are in the first sub-region or all dummy pads are in the second sub-region. The dummy pad 341 is flexibly disposed in the first sub-region Q11 and / or the second sub-region Q12 , and the position of the dummy pad can be flexibly adjusted according to different panel requirements, thereby meeting different scenarios.

[0056] In addition, a and b can be understood as the number of floating dummy pads, which are generally arranged between the first pad 331 and the second pad 321, or between the display driver pad 331 and the first pad 331 or the second pad 321, which can reduce the coupling between different signals and improve the stability of the signal.

[0057] It should be noted that in the second zone Q2, in order to improve the yield and uniformity of binding and avoid the coupling influence between different clock signal lines and data lines, multiple dummy pads will be interspersed inside the multiple display driver pads 331. The number of these dummy pads is not specified in this disclosure, and the number of these dummy pads is not included in the number of dummy pads in the first sub-zone Q11 and the second sub-zone Q12 in this disclosure, nor is it included in the number of floating dummy pads in this disclosure.

[0058] refer to Figure 3 、 Figure 4 and Figure 5 The number of the first touch leads 211 is m, and the number of the second touch leads 221 is n, that is, a 1T1R touch display panel. Since the touch driving mode of the touch display panel is 1T1R, the border area occupied by the first touch leads and the second touch leads will be smaller, thereby realizing a narrow border of the display panel.

[0059] For the 1T1R touch display module, since the number of touch leads of the 1T1R display panel is significantly less than that of the touch leads of the 2T1R display panel, that is, the number of touch pads required by the 1T1R display panel is significantly less than that of the 2T1R display panel, the number of touch pads in the touch display chip of the 1T1R display panel will be less. In this case, the number x of the dummy pads 341 is m+0.5n+b. In this way, the relative positions of the first pad 311, the dummy pad 341 and the second pad 321 can be flexibly set, which can avoid the overlap of the first touch lead 211 and the second touch lead 221, that is, no jumper is required in the display panel, and the coupling interference between different signal lines can also be reduced through the dummy pad 341.

[0060] like Figure 3 and Figure 5As shown in FIG. , this embodiment illustrates a different arrangement of pads for a touch display integrated chip under a 1T1R touch drive mode. In the prior art, for display panels employing a 1T1R touch drive mode and with a large ratio between the length of the display panel in the second direction D2 and the length of the display panel in the first direction D1, the number of Rx lines is typically significantly greater than the number of Tx lines. For example, a typical mobile phone has 28 to 36 Rx lines, while the corresponding number of Tx lines is typically 13 to 20. To ensure uniform widths of the left and right bezels of the display panel, Rx lines are typically provided on both sides of the non-display area NA. This means that the first sub-area Q11 and the second sub-area Q12 each have approximately 0.5n second touch leads 221. However, this is not limiting. For display panels with a unique ratio between the length of the second direction D2 and the length of the first direction D1, the number of second touch leads 221 in the first sub-area Q11 and the second sub-area Q12 may be unequal. In this embodiment, the first sub-region Q11 includes m first solder pads 311, p second solder pads 321 and x1 first dummy sub-pads 3411, the p second solder pads 321 are located on the side of the m first solder pads 311 away from the second region Q2, and the x1 first dummy sub-pads 3411 are located on the side of the p second solder pads 321 away from the second region Q2; the second sub-region Q12 includes np second solder pads 321 and x2 second dummy sub-pads 3412, the x2 second dummy sub-pads 3412 are located on the side of the np second solder pads 321 away from the second region Q2, or the np second solder pads 321 are located on the side of the x2 second dummy sub-pads 3412 away from the second region Q2. Figure 3 Only p=2 is used for illustration and description, but this does not represent the actual number of p in the present disclosure.

[0061] refer to Figure 3 and Figure 4 In the first sub-area Q11, the second pad 321 is located between the first pad 311 and the first dummy sub-pad 3411. That is, the first dummy sub-pad 3411 is located near the edge of the touch display integrated chip 30. The display panel does not need to lay out a trace corresponding to and electrically connected to the first dummy sub-pad 3411, and the second pad 321 is closer to the middle area of ​​the display area AA. This saves wiring space in the non-display area and helps narrow the non-display area. On the one hand, the np second pads 321 in the second sub-area Q12 can be set near the edge of the touch display integrated chip 30. Then, the second dummy sub-pad 3412 is located between the display driver pad 331 of the second area Q2 and the np second pads 321 of the second sub-area Q12. This helps reduce the coupling effect between the display driver pad 331 and the second pad 321, thereby improving touch and display performance. On the other hand, see Figure 5Alternatively, the second dummy sub-pad 3412 in the second sub-region Q12 may be disposed near the edge of the touch display integrated chip 30 , thereby saving wiring space in the non-display region and facilitating a narrow frame of the display panel.

[0062] like Figure 6 As shown, Figure 6 This is another arrangement of the touch display integrated chip pads under the 1T1R touch driving mode. The first sub-area Q11 includes at least m first pads 311, p second pads 321, and multiple first dummy sub-pads 3411. In the first sub-area Q11, the second pad 321 is located at the edge of the touch display integrated chip 30, and the first dummy sub-pad 3411 is located between the first pad 311 and the second pad 321. In this way, the arrangement of the first dummy sub-pad 3411 can increase the physical distance between the first pad 311 and the second pad 321, thereby reducing signal interference between the two and improving touch performance. The second sub-area Q12 includes np second pads 321 and multiple second dummy sub-pads 3412. The second dummy sub-pads 3412 are arranged near the edge of the touch display integrated chip 30. As mentioned above, there is no need to arrange a trace corresponding to and electrically connected to the second dummy sub-pads 3412 in the display panel, which can reduce the border of the display panel. Alternatively, the second pad 321 is arranged near the edge of the touch display integrated chip 30, that is, the second dummy sub-pad 3412 is located between the display driver pad 331 of the second area Q2 and the np second pads 321 of the second sub-area Q12. This can reduce the coupling effect between the display driver pad 331 and the second pad 321, improve the reliability of signal transmission, and thus improve the touch performance and display performance.

[0063] refer to Figure 7 , Figure 7 for Figure 6As shown, another arrangement of the touch display integrated chip pads under the 1T1R touch driving mode is shown. The first sub-area Q11 includes m first pads 311, p second pads 321, and x1 first dummy sub-pads 3411. In the first sub-area Q11, the second pad 321 is located at the edge of the touch display integrated chip 30, and the first pad 311 is located between the first dummy sub-pad 3411 and the second pad 321. That is, the first dummy sub-pad 3411 is located between the first pad 311 of the first sub-area Q11 and the display driver pad 331 located in the second area Q2. In this way, the arrangement of the first dummy sub-pad 3411 can increase the physical distance between the first pad 311 and the display driver pad 331, thereby reducing signal interference between the first pad 311 and the display driver pad 331, and improving touch performance and display performance. The second sub-area Q12 includes np second pads 321 and multiple second dummy sub-pads 3412. The second dummy sub-pads 3412 are arranged near the edge of the touch display integrated chip 30. Since there is no need to arrange wiring corresponding to and electrically connected to the second dummy sub-pads 3412 in the display panel, it is beneficial to the narrow frame of the display panel. On the other hand, the second pad 321 can also be arranged near the edge of the touch display integrated chip 30, that is, the second dummy sub-pad 3412 is located between the display driver pad 331 of the second area Q2 and the np second pads 321 of the second sub-area Q12, which can reduce the signal interference between the display driver pad 331 and the second pad 321 and improve the reliability of signal transmission.

[0064] refer to Figure 8 and Figure 10 The number of first touch leads 211 is 2m, and the number of second touch leads 221 is n, which is a 2T1R touch display panel. The 2T1R touch display panel can increase the reliability of the display panel. In other words, if one set of Tx lines breaks or is damaged and fails, the other set of Tx lines can still function as touch leads, greatly increasing the risk resistance of the display panel. Currently, for the 2T1R touch method, the general touch lead wiring method is to wire two sets of Tx lines on the upper and lower sides of the display area along the first direction D1, and one of the Tx lines wired on the upper side will be routed to one of the left and right sides of the non-display area and further extended to the binding area. To prevent the Tx lines from overlapping with the Rx lines, the Rx lines are correspondingly arranged on the other side of the left and right sides of the non-display area. The wiring of the 2T1R in the embodiment of the present disclosure can refer to the wiring method of the above-mentioned prior art, but is not limited thereto.

[0065] For a 2T1R touch display panel, since there are two sets of Tx lines, the number of touch pads occupied by the touch display chip is greater than that of a 1T1R panel. The number x of dummy pads 341 is 0.5n + a. The provision of dummy pads 341 can reduce coupling interference between different signal lines and improve signal transmission reliability.

[0066] Continue to refer Figure 8 and Figure 9 , Figure 8 and Figure 9 This is a pad arrangement for a touch display integrated chip under a 2T1R touch drive mode. The first sub-area Q11 includes 2m first pads 311 and x1 first dummy sub-pads 3411. The first pads 311 include a first group of first pads 3111 and a second group of first pads 3112. The number of first pads in each of the first group of first pads 3111 and the second group of first pads 3112 is m. In the first sub-area Q11, the first dummy sub-pad 3411 is located between the first group of first pads 3111 and the second group of second pads 3112. The second sub-area Q12 includes n second pads 321. By arranging the first dummy sub-pad 3411 between the first group of first pads 3111 and the second group of second pads 3112, coupling interference between the first group of first pads 3111 and the second group of second pads 3112 can be reduced, thereby preventing signal instability. It is understandable that in this embodiment, no second dummy sub-pad 3412 is provided in the second sub-area Q12, that is, x2=0, but the second sub-area Q12 can also be provided with at most a floating dummy pads, and the number of the floating dummy pads is not limited.

[0067] like Figure 10 As shown, Figure 10 This is another arrangement of the pads of the touch display integrated chip under the 2T1R touch driving mode. The first sub-area Q11 includes 2m first pads 311 and x1 first dummy sub-pads 3411, wherein the first pads 311 include a first group of first pads 3111 and a second group of first pads 3112, and the number of first pads in the first group of first pads 3111 and the second group of first pads 3112 is m. The first group of first pads 3111 is located between the first dummy sub-pad 3411 and the second group of second pads 3112. The second sub-area Q12 includes n second pads 321. By setting the first dummy sub-pad 3411 of the first sub-area Q11 in the edge area close to the touch display integrated chip 30, as mentioned above, the display panel does not need to arrange the wiring electrically connected to the first dummy sub-pad, so that the wiring space in the non-display area can be saved, which is conducive to the narrow frame of the display panel. Figure 6Similarly, in this embodiment, no second dummy sub-pad 3412 is provided in the second sub-area Q12, that is, x2=0, but the second sub-area Q12 can further be provided with at most a floating dummy pads, and the number of the floating dummy pads is not limited.

[0068] In combination with the above embodiments, it can be seen that when the number of pads of the display touch integrated chip 30 is set to a certain value, the same display touch integrated chip 30 can be compatible with both 1T1R display panels and 2T1R display panels. Obviously, in the case of 1T1R, the number of its dummy pads is significantly greater than that of 2T1R. It can be understood that the dummy pads are also the selection pads, that is, in some cases, such as the 1T1R touch mode, some of the selection pads are used as dummy pads, but in other cases, such as the 2T1R touch mode, some of the selection pads are used as touch pads. Under different touch driving modes, the selection pads can be set to different signals, thereby making the display touch integrated chip 30 more compatible and adaptable. Not only that, the relative position relationship between the dummy pad 341 and the first pad 311, the second pad 321 and the display driving pad 331 can also be flexibly adjusted to reduce coupling interference between different signal lines or reduce the border of the non-display area.

[0069] Optionally, refer to Figure 11 The binding area BD of the display panel 10 also includes x dummy pins 441. In the binding area BD, the dummy pins 441 are connected to the dummy pads 341 of the touch display integrated chip 30 in a one-to-one manner through the conductive particles in the ACF. The provision of dummy pins can ensure the uniformity and high consistency of the binding of the panel.

[0070] Optionally, refer to Figure 12 The binding area BD of the display panel 10 may also not be provided with the dummy pin 441, and the dummy pad 341 of the touch display integrated chip 30 is electrically insulated from the binding area BD. In this way, some signal lines of the display panel 10 can be wired in the binding area BD corresponding to the dummy pad 341, thereby increasing the wiring space of the display panel.

[0071] For example, the dummy pad 341 in the touch display integrated chip 30 is a non-effective channel.

[0072] The inactive channel is set to an electrically floating state, so that the touch display integrated chip 30 does not need to provide an electrical signal to the dummy pad 341, thereby saving power consumption of the touch display integrated chip 30. Alternatively, for example, the inactive channel can also be electrically connected to a ground signal. Connecting the dummy pad 341 to the ground signal can increase the dummy pad 341's ability to prevent signal coupling interference, thereby improving touch and display performance.

[0073] Generally speaking, the number of pads of the touch display integrated chip 30 and the number of pins of the bonding area BD are

[0074] If only one row is provided, the size of the touch display integrated chip 30 may be increased, resulting in a waste of resources. Setting multiple rows of pins can make the binding pads in the binding area more compact, increase the utilization rate of the binding area, and help to reduce the frame to a certain extent. Figure 13a and Figure 13b As shown, in the present disclosure, the binding area BD can be set to have two rows of pins and the touch display integrated chip 30 also has two rows of pads corresponding thereto, or the binding area BD can be set to have three rows of pins and the touch display integrated chip 30 also has three rows of pads corresponding thereto. Figure 13a and Figure 13b It can also be seen that the pins can be arranged in an array or in a staggered arrangement. This application does not limit the number of pin rows and the specific arrangement of the pins in the binding area BD.

[0075] Figure 14 FIG. 1 is a schematic structural diagram of a display device in an embodiment of the present application; FIG. Figure 14 As shown, based on the same inventive concept, the embodiment of the present application further provides a display device 2, which includes the touch display panel 1 in any of the above embodiments. The display device provided in the embodiment of the present application can be Figure 14 The mobile phone shown can also be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, industrial control equipment, medical display screens, touch interactive terminals, etc. The embodiments of this application do not specifically limit this.

[0076] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A touch display module, characterized in that: include: a display panel comprising a display area and a non-display area, the display area comprising m first touch electrodes arranged along a first direction and extending along a second direction, and n second touch electrodes arranged along a second direction and extending along the first direction, the first direction intersecting the second direction; The non-display area includes a plurality of first touch leads, a plurality of second touch leads, and a binding area, wherein the binding area includes at least a plurality of first touch pins, a plurality of second touch pins, and a plurality of display drive pins, the first touch leads are electrically connected to the first touch electrodes, and the first touch leads extend to the binding area and are electrically connected to the corresponding first touch pins in the binding area, the second touch leads are electrically connected to the second touch electrodes, and the second touch leads extend to the binding area and are electrically connected to the corresponding second touch pins in the binding area; The display panel further includes a plurality of display drive signal lines, the display drive signal lines being electrically connected to the pixel circuits in the display area, and the display drive signal lines extending to the binding area and being electrically connected to corresponding display drive pins in the binding area; A touch display integrated chip, the touch display integrated chip comprising a plurality of first pads, x dummy pads, a plurality of display driver pads, and a plurality of second pads, wherein in the binding area, the first touch pin is electrically connected to the first pad, the second touch pin is electrically connected to the second pad, and the display driver pin is electrically connected to the display driver pad; The touch display integrated chip also includes a first area and a second area. Along the first direction, the first area is located on both sides of the second area, the display driver pad is located in the second area, the first pad, the dummy pad and the second pad are all located in the first area, 0.5n+a≤x≤m+0.5n+b, x, m and n are all positive integers, a and b are the number of floating dummy pads and are both integers.

2. The touch display module according to claim 1, wherein: The first area includes a first sub-area and a second sub-area, and the first sub-area, the second area, and the second sub-area are arranged in sequence along the first direction; the dummy pad located in the first sub-area is a first dummy sub-pad, and the dummy pad located in the second sub-area is a second dummy sub-pad, the number of the first dummy sub-pads is x1, and the number of the second dummy sub-pads is x2, x1+x2=x, x1 and x2 are both integers, and 0≤a≤20, 0≤b≤20.

3. The touch display module according to claim 2, wherein: The number of the first touch leads is m, and the number of the second touch leads is n.

4. The touch display module according to claim 3, wherein: x=m+0.5n+b.

5. The touch display module according to claim 3, wherein: The first sub-region includes m first pads, p second pads, and x1 first dummy sub-pads, the p second pads are located on a side of the m first pads away from the second region, and the x1 first dummy sub-pads are located on a side of the p second pads away from the second region; The second sub-region includes np second pads and x2 second dummy sub-pads, the x2 second dummy sub-pads are located on a side of the np second pads away from the second region, or the np second pads are located on a side of the x2 second dummy sub-pads away from the second region.

6. The touch display module according to claim 3, wherein: The first sub-region includes m first pads, p second pads, and x1 first dummy sub-pads, the x1 first dummy sub-pads are located on a side of the m first pads away from the second region, and the p second pads are located on a side of the x1 first dummy sub-pads away from the second region; The second sub-region includes np second pads and x2 second dummy sub-pads, the x2 second dummy sub-pads are located on a side of the np second pads away from the second region, or the np second pads are located on a side of the x2 second dummy sub-pads away from the second region.

7. The touch display module according to claim 3, wherein: The first sub-region includes m first pads, p second pads, and x1 first dummy sub-pads, the m first pads are located on a side of the x1 first dummy sub-pads away from the second region, and the p second pads are located on a side of the m first pads away from the second region; The second sub-region includes np second pads and x2 second dummy sub-pads, the x2 second dummy sub-pads are located on a side of the np second pads away from the second region, or the np second pads are located on a side of the x2 second dummy sub-pads away from the second region.

8. The touch display module according to claim 2, wherein: The number of the first touch leads is 2m, and the number of the second touch leads is n.

9. The touch display module according to claim 8, wherein: x=0.5n+a.

10. The touch display module according to claim 8, wherein: The first sub-area includes 2m first pads and x1 first dummy sub-pads, wherein the first pads include a first group of first pads and a second group of first pads, and the number of first pads in the first group of first pads and the second group of first pads is m, the x1 first dummy sub-pads are located on the side of the second group of first pads away from the second area, the first group of first pads are located on the side of the x1 first dummy sub-pads away from the second area, and the second sub-area includes n second pads.

11. The touch display module according to claim 8, wherein: The first sub-area includes 2m first pads and x1 first dummy sub-pads, wherein the first pads include a first group of first pads and a second group of first pads, and the number of first pads in the first group of first pads and the second group of first pads is m. The first group of first pads is located on a side of the second group of first pads away from the second area, the x1 first dummy sub-pads are located on a side of the first group of first pads away from the second area, and the second sub-area includes n second pads.

12. The touch display module according to claim 1, wherein: The binding area further includes x dummy pins, and in the binding area, the dummy pins are electrically connected to the dummy pads.

13. The touch display module according to claim 1, wherein: The binding area has no dummy pins, and the dummy pads are electrically insulated from the binding area.

14. The touch display module according to claim 1, wherein: The dummy pad in the touch display integrated chip is a non-valid channel, and the non-valid channel is in an electrically floating state.

15. The touch display module according to claim 1, wherein: The dummy pad in the touch display integrated chip is a non-valid channel, and the non-valid channel is electrically connected to a ground signal.

16. The touch display module according to claim 1, wherein: The binding area includes at least two pin rows arranged along the second direction, and each pin row includes a plurality of pins arranged along the first direction.

17. The touch display module according to claim 1, wherein: The display driving signal line includes at least one of a data line, a clock signal line, and a constant voltage signal line.

18. A display device, characterized in that: Comprising the touch display module according to any one of claims 1-17.

Images