Touch display panel and touch display device

Abstract

The embodiment of the present application provides a touch display panel and a touch display device, wherein the touch display panel includes a display area, the display area includes a plurality of drive channels arranged at intervals along a first direction and a plurality of sensing channels arranged at intervals along a second direction; the display area includes a regular display area and a special-shaped display area, the regular display area and the special-shaped display area are arranged in sequence along the second direction, and the special-shaped display area is located on at least one side of the regular display area; the area of ​​the sensing channel in the special-shaped display area is smaller than the area of ​​the sensing channel in the regular display area; one end of the sensing channel in the regular display area is electrically connected to a first touch sensing signal line; the first end of the sensing channel in the special-shaped display area is electrically connected to a second touch sensing signal line, and the second end of the sensing channel in the special-shaped display area is electrically connected to a third touch sensing signal line. The embodiment of the present application can reduce the attenuation of the touch sensing signal generated by the sensing channel in the special-shaped display area during the transmission process, and improve the accuracy of touch detection.

Description

Technical Field

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

[0002] With the rapid development of display technology, touch display technology has gradually spread throughout people's lives. Touch display panels have the advantages of display and position touch detection functions, easy use, and good human-computer interaction experience, so they are widely favored by the market.

[0003] In order to meet the requirements of aesthetic design and functional design, touch display panels are usually provided with special-shaped display areas such as R corners. The inventors of this application have found that the touch sensing signals generated by the touch electrodes at some positions in the special-shaped display area are severely attenuated, which leads to the problem that the touch input cannot be detected when the touch objects such as fingers touch these positions. Summary of the invention

[0004] The embodiments of the present application provide a touch display panel and a touch display device, which can solve the technical problem of severe attenuation of touch sensing signals generated by touch electrodes in a special-shaped display area and improve the accuracy of touch detection.

[0005] In a first aspect, an embodiment of the present application provides a touch display panel, which includes a display area, the display area includes a plurality of drive channels arranged at intervals along a first direction and a plurality of sensing channels arranged at intervals along a second direction, and the first direction intersects with the second direction; the display area includes a regular display area and an irregular display area, the regular display area and the irregular display area are arranged in sequence along the second direction, and the irregular display area is located on at least one side of the regular display area; the area of ​​the sensing channel in the irregular display area is smaller than the area of ​​the sensing channel in the regular display area; the first end or the second end of the sensing channel in the regular display area is electrically connected to the first touch sensing signal line; the first end of the sensing channel in the irregular display area is electrically connected to the second touch sensing signal line, and the second end of the sensing channel in the irregular display area is electrically connected to the third touch sensing signal line.

[0006] In a second aspect, an embodiment of the present application provides a touch display device, which includes the touch display panel provided in the first aspect.

[0007] In the touch display panel and the touch display device of the embodiments of the present application, on the one hand, the sensing channel in the regular display area is electrically connected to the first touch sensing signal line only, that is, a single-ended lead is adopted, thereby reducing the occupation of the first touch sensing signal line for the frame of the touch display panel, which is conducive to a narrow frame design; on the other hand, one end of the sensing channel in the special-shaped display area is electrically connected to the second touch sensing signal line, and the other end is electrically connected to the third touch sensing signal line, that is, a double-ended lead is adopted, thereby reducing the attenuation of the touch sensing signal generated by the sensing channel in the special-shaped display area during the transmission process, ensuring that the touch chip can accurately detect the touch sensing signal generated by the sensing channel in the special-shaped display area, thereby improving the accuracy of touch detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0009] Figure 1 A structural schematic diagram of a touch display panel;

[0010] Figure 2 A schematic diagram of the structure of a touch display panel provided in an embodiment of the present application;

[0011] Figure 3 Another structural schematic diagram of a touch display panel provided in an embodiment of the present application;

[0012] Figure 4 A schematic diagram of another structure of a touch display panel provided in an embodiment of the present application;

[0013] Figure 5 A schematic diagram of another structure of a touch display panel provided in an embodiment of the present application;

[0014] Figure 6 A schematic diagram of another structure of a touch display panel provided in an embodiment of the present application;

[0015] Figure 7 A schematic diagram of another structure of a touch display panel provided in an embodiment of the present application;

[0016] Figure 8 A schematic diagram of another structure of a touch display panel provided in an embodiment of the present application;

[0017] Fig. 9 A schematic diagram of another structure of a touch display panel provided in an embodiment of the present application;

[0018] Fig.10 A schematic diagram of another structure of a touch display panel provided in an embodiment of the present application;

[0019] Fig.11 A schematic cross-sectional view of a touch display panel provided in an embodiment of the present application;

[0020] Fig.12 A schematic diagram of the structure of a touch display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0023] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0024] In the embodiments of the present application, the term “electrically connected” may refer to a direct electrical connection between two components, or may refer to an electrical connection between two components via one or more other components.

[0025] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0026] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0027] Figure 1 FIG. 1 is a schematic diagram of a structure of a touch display panel. Figure 1 As shown, the touch display panel may include a plurality of driving channels Tx and a plurality of sensing channels Rx that cross each other. Each driving channel Tx may include a plurality of touch driving electrodes p1' electrically connected to each other, and each sensing channel Rx may include a plurality of touch sensing electrodes p2' electrically connected to each other. In order to meet the narrow frame design, the touch signal line connected to the sensing channel Rx is usually only wired from the left frame or the right frame of the touch display panel, that is, each sensing channel Rx is only connected to one touch signal line.

[0028] In order to satisfy both aesthetic and functional designs, the touch display panel is usually provided with a special-shaped display area 101' such as an R corner. The sensing channel Rx at the R corner or the touch sensing electrode p2' will be cut so that the area of ​​the touch sensing electrode p2' at the R corner is smaller than the area of ​​the touch sensing electrode p2' in other areas. This will cause the touch sensing signal strength generated by the touch sensing electrode p2' at the R corner to be smaller. For example, the voltage value or capacitance value of the touch sensing signal generated by the touch sensing electrode p2' at the R corner will be smaller than the voltage value or capacitance value of the touch sensing signal generated by the touch sensing electrode p2' in other areas.

[0029] In addition, since the sensing channel Rx adopts a single-ended lead, the touch sensing signal generated by the touch sensing electrode p2' at the R corner at the end far from the touch signal line (such as the left end) will first pass through the sensing channel Rx, and then through the touch signal line to reach the touch chip. Since both the sensing channel Rx and the touch signal line have impedance, the attenuation of the touch sensing signal during the transmission process is relatively serious, so that the touch sensing signal, which is already weak in strength, is further attenuated during the transmission process, and the touch sensing signal is very weak when it reaches the touch chip. Therefore, when a touch object such as a finger contacts the touch sensing electrode p2' at the R corner at the end far from the touch signal line, the touch chip is not easy to detect the touch sensing signal, and it is easy to fail to detect the touch input.

[0030] In view of the above research findings of the inventors, the embodiments of the present application provide a touch display panel and a touch display device, which can solve the technical problem of serious attenuation of touch sensing signals generated by touch electrodes in special-shaped display areas existing in the related art and improve the accuracy of touch detection.

[0031] The technical concept of the embodiment of the present application is that a double-ended lead is adopted for the sensing channel in the special-shaped display area, so that the touch sensing signal generated by the touch sensing electrode at the first end of the sensing channel or the touch sensing electrode at the second end of the sensing channel can be directly transmitted to the touch chip through the touch signal line, thereby reducing the transmission distance of the touch sensing signal, reducing the attenuation of the touch sensing signal generated by the sensing channel in the special-shaped display area during the transmission process, ensuring that the touch chip can accurately detect the touch sensing signal generated by the sensing channel in the special-shaped display area, and improving the accuracy of touch detection.

[0032] The following first introduces the touch display panel provided in the embodiment of the present application.

[0033] Figure 2 A schematic diagram of the structure of a touch display panel provided in an embodiment of the present application. Figure 2 As shown, the touch display panel 20 provided in the embodiment of the present application may be a mutual capacitive touch display panel. Specifically, the touch display panel 20 may include a display area AA, and the display area AA may include a plurality of drive channels Tx arranged at intervals along a first direction X and a plurality of sensing channels Rx arranged at intervals along a second direction Y, and the first direction X intersects the second direction Y. Figure 2 In the illustrated embodiment, the first direction X is the row direction of the touch display panel 20, and the second direction Y is the column direction of the touch display panel 20 as an illustration. However, in other embodiments, the first direction X may also be the column direction of the touch display panel 20, and the second direction Y may be the row direction of the touch display panel 20, and the embodiment of the present application is not limited to this.

[0034] Each driving channel Tx may include a plurality of touch driving electrodes p1 arranged in sequence and electrically connected to each other along the second direction Y, and each sensing channel Rx may include a plurality of touch sensing electrodes p2 arranged in sequence and electrically connected to each other along the first direction X. The driving channel Tx may be used to receive a touch driving signal provided by a touch chip, and under the coupling effect between the sensing channel Rx and the driving channel Tx, the sensing channel Rx may generate a touch sensing signal. The touch sensing signal is transmitted to the touch chip, and the touch chip may determine the touch position according to the touch sensing signal.

[0035] like Figure 2As shown, the display area AA may include a regular display area A1 and a special-shaped display area A2. The regular display area A1 may be arranged in sequence with the special-shaped display area A2 along the second direction Y, and the special-shaped display area A2 may be located on at least one side of the regular display area A1. The shape of the regular display area A1 may be, for example, a rectangle, and the shape of the special-shaped display area A2 may be, for example, an irregular shape, such as the special-shaped display area A2 may be an area corresponding to the R angle. It should be noted that the special-shaped display area A2 may also be other irregular shapes, such as a trapezoid, which is not limited in the present embodiment of the application.

[0036] Since the sensing channel Rx in the irregular display area A2 is cut, such as the touch sensing electrode p2 at the edge of the sensing channel Rx is cut, the area of ​​the sensing channel Rx in the irregular display area A2 is smaller than the area of ​​the sensing channel Rx in the regular display area A1. For example, for example, one sensing channel Rx in the irregular display area A2 includes 10 touch sensing electrodes p2, and one sensing channel Rx in the regular display area A1 also includes 10 touch sensing electrodes p2, but since the touch sensing electrodes p2 at both ends of the sensing channel Rx in the irregular display area A2 are cut, the total area of ​​the 10 touch sensing electrodes p2 in one sensing channel Rx in the irregular display area A2 is smaller than the total area of ​​the 10 touch sensing electrodes p2 in one sensing channel Rx in the regular display area A1.

[0037] It should be noted that one sensing channel Rx may be provided in the special-shaped display area A2, or a plurality of sensing channels Rx may be provided, which is not limited in the embodiment of the present application.

[0038] In the embodiment of the present application, the first end or the second end of the sensing channel Rx in the regular display area A1 is electrically connected to the first touch sensing signal line TP1. That is, only one end of the sensing channel Rx in the regular display area A1 is connected to the first touch sensing signal line TP1. The first touch sensing signal line TP1 can be used to transmit a touch driving signal. The first end of the sensing channel Rx in the special-shaped display area A2 is electrically connected to the second touch sensing signal line TP2, and the second end of the sensing channel Rx in the special-shaped display area A2 is electrically connected to the third touch sensing signal line TP3. Both the second touch sensing signal line TP2 and the third touch sensing signal line TP3 can be used to transmit the touch sensing signal generated by the sensing channel Rx to the touch chip.

[0039] In the touch display panel of the embodiment of the present application, on the one hand, the sensing channel in the regular display area A1 is only electrically connected to the first touch sensing signal line TP1, that is, a single-ended lead is adopted, thereby reducing the occupation of the first touch sensing signal line TP1 for the border of the touch display panel, which is conducive to a narrow border design. On the other hand, the first end of the sensing channel in the special-shaped display area A2 is electrically connected to the second touch sensing signal line TP2, and the second end is electrically connected to the third touch sensing signal line TP3, that is, the sensing channel in the special-shaped display area A2 adopts a double-ended lead. In this way, whether it is the touch sensing electrode at the first end of the sensing channel in the special-shaped display area A2 or the touch sensing electrode at the second end of the sensing channel in the special-shaped display area A2, the touch sensing signal generated by it can be directly transmitted to the touch chip through the touch signal line, thereby reducing the transmission distance of the touch sensing signal (or reducing the length of the wiring through which the touch sensing signal must pass), reducing the attenuation of the touch sensing signal generated by the sensing channel in the special-shaped display area during the transmission process, ensuring that the touch chip can accurately detect the touch sensing signal generated by the sensing channel in the special-shaped display area, and improving the accuracy of touch detection.

[0040] In addition, since the area of ​​the special-shaped display area A2 only occupies a small part of the entire display area, even if all the sensing channels Rx in the special-shaped display area A2 use double-ended leads, it will not increase a lot of touch sensing signal lines, thereby improving the accuracy of touch detection while meeting the narrow frame design.

[0041] Figure 3 This is another structural diagram of the touch display panel provided in the embodiment of the present application. Figure 3 As shown, according to some embodiments of the present application, optionally, the touch display panel 20 may further include a non-display area NA. The non-display area NA may include a binding area NA1, and the binding area NA1 may be used to bind a touch chip or a flexible printed circuit (Flexible Printed Circuit, FPC). Specifically, the binding area NA1 may be provided with a binding pad, and the binding pad may be directly electrically connected to the pad on the touch chip, or may be indirectly electrically connected to the touch chip through a flexible printed circuit.

[0042] The special-shaped display area A2 may include a first special-shaped display area A21 and a second special-shaped display area A22. The first special-shaped display area A21, the regular display area A1, the second special-shaped display area A22 and the binding area NA1 are arranged in sequence along the second direction Y. Figure 3 As shown, for example, the touch display panel 20 may include four R corners, according to Figure 3The positions in the figure are respectively the upper left R corner R1, the lower left R corner R2, the upper right R corner R3 and the lower right R corner R4. For example, the first special-shaped display area A21 may be the special-shaped display area where the R corners R1 and R3 are located, that is, the first special-shaped display area A21 is close to the upper frame. The second special-shaped display area A22 may be the special-shaped display area where the R corners R2 and R4 are located, that is, the second special-shaped display area A22 is close to the lower frame (such as the binding area NA1).

[0043] The present application takes into account that the first special-shaped display area A21 is the farthest from the touch chip, that is, the touch sensing signal generated by the sensing channel Rx in the first special-shaped display area A21 is most severely attenuated during the transmission process. Figure 3 In the illustrated embodiment, the sensing channel Rx in the first special-shaped display area A21 may adopt a double-ended lead. Specifically, the first end of the sensing channel Rx in the first special-shaped display area A21 may be electrically connected to the second touch sensing signal line TP2, and the second end of the sensing channel Rx in the first special-shaped display area A21 may be electrically connected to the third touch sensing signal line TP3.

[0044] In this way, since the sensing channel in the first special-shaped display area A21 adopts a double-ended lead, the touch sensing signal generated by the touch sensing electrode at the first end of the sensing channel in the first special-shaped display area A21 or the touch sensing electrode at the second end of the sensing channel in the first special-shaped display area A21 can be directly transmitted to the touch chip through the touch signal line, thereby reducing the transmission distance of the touch sensing signal (or reducing the length of the wiring through which the touch sensing signal must pass), reducing the attenuation of the touch sensing signal generated by the sensing channel in the special-shaped display area during the transmission process, ensuring that the touch chip can accurately detect the touch sensing signal generated by the sensing channel in the special-shaped display area, and improving the accuracy of touch detection.

[0045] exist Figure 3 In the illustrated embodiment, the sensing channel in the second special-shaped display area A22 closer to the touch chip can adopt a single-ended lead. For example, in some examples, one end of the sensing channel Rx in the second special-shaped display area A22 can be electrically connected to the second touch sensing signal line TP2, and the other end is floating. Of course, one end of the sensing channel Rx in the second special-shaped display area A22 can also be electrically connected to the third touch sensing signal line TP3, and the other end is floating, which is not limited in the embodiment of the present application.

[0046] In the embodiment of the present application, the second touch sensing signal line TP2 and the third touch sensing signal line TP3 are both touch sensing signal lines. Just for the convenience of explanation, the touch sensing signal line connected to the first end of the sensing channel Rx in the special-shaped display area A2 is called the second touch sensing signal line TP2, and the touch sensing signal line connected to the second end of the sensing channel Rx in the special-shaped display area A2 is called the third touch sensing signal line TP3. In other words, the sensing channel Rx in the second special-shaped display area A22 can be connected to the touch sensing signal line at only one end, and the other end is not connected to the touch sensing signal line.

[0047] Since the second special-shaped display area A22 is closer to the touch chip, that is, the touch sensing signal generated by the sensing channel Rx in the second special-shaped display area A22 attenuates less during the transmission process, it is possible to reduce the number of touch sensing signal lines by adopting single-ended leads while ensuring that the touch chip can detect the touch sensing signal generated by the sensing channel in the second special-shaped display area A22, thereby further reducing the occupancy of the frame.

[0048] Figure 4 This is another structural diagram of a touch display panel provided in an embodiment of the present application. Figure 4 As shown, Figure 3 Different from the embodiment shown, according to other embodiments of the present application, optionally, the sensing channel in the first special-shaped display area A21 and the sensing channel in the second special-shaped display area A22 can both adopt double-ended leads. Specifically, the first end of the sensing channel Rx in the second special-shaped display area A22 can be electrically connected to the second touch sensing signal line TP2, and the second end of the sensing channel Rx in the second special-shaped display area A22 can be electrically connected to the third touch sensing signal line TP3.

[0049] In this way, since the sensing channels in the first special-shaped display area A21 and the second special-shaped display area A22 both adopt double-ended leads, the attenuation of the touch sensing signals generated by the sensing channels in the first special-shaped display area A21 and the second special-shaped display area A22 during the transmission process can be reduced, ensuring that the touch chip can accurately detect the touch sensing signals generated by the sensing channels in the first special-shaped display area A21 and the second special-shaped display area A22, thereby improving the accuracy of touch detection.

[0050] Figure 5 This is another structural diagram of a touch display panel provided in an embodiment of the present application. Figure 5As shown, according to some embodiments of the present application, optionally, the non-display area NA may further include a step area NA2, and the step area NA2 may be located between the display area AA and the binding area NA1 along the second direction Y. The second touch sensing signal line TP2 and / or the third touch sensing signal line TP3 electrically connected to the sensing channel Rx in the second special-shaped display area A22 may be located in the step area NA2, i.e., the lower frame.

[0051] In this way, since the second touch sensing signal line TP2 and / or the third touch sensing signal line TP3 electrically connected to the sensing channel Rx in the second special-shaped display area A22 is located in the step area NA2, the occupancy of the second touch sensing signal line TP2 and / or the third touch sensing signal line TP3 on the left frame and / or the right frame can be reduced, and the width of the left frame and / or the right frame can be reduced, which is conducive to the design of a narrow frame.

[0052] Figure 6 This is another structural diagram of a touch display panel provided in an embodiment of the present application. Figure 6 As shown, according to some embodiments of the present application, optionally, the non-display area NA may include a first frame area B1 and a second frame area B2. Along the first direction X, the first frame area B1, the display area AA and the second frame area B2 are arranged in sequence. It should be noted that, Figure 6 As shown, in some examples, the first border area B1 can be the right border, and the second border area B2 can be the left border. Of course, in other examples, the first border area B1 can also be the left border, and the second border area B2 can be the right border, which is not limited in the present embodiment.

[0053] exist Figure 6 In the illustrated embodiment, the second touch sensing signal line TP2 may be located in the first frame area B1, and the third touch sensing signal line TP3 may be located in the second frame area B2. In addition to the second touch sensing signal line TP2 and the third touch sensing signal line TP3, the touch display panel 20 may further include a first touch driving signal line TP1'. The driving channel Tx may be electrically connected to the first touch driving signal line TP1', and the first touch driving signal line TP1' may be used to transmit a first touch driving signal.

[0054] The first touch driving signal line TP1' can be located in the first frame area B1 or the second frame area B2, which is not limited in the present embodiment. Similarly, the first touch sensing signal line TP1 can be located in the first frame area B1 or the second frame area B2.

[0055] Depend on Figure 6It can be seen that touch sensing signal lines and / or touch driving signal lines can be arranged on both the left frame and the right frame, so as to balance the width of the left frame and the width of the right frame, making the touch display panel more beautiful.

[0056] Figure 7 This is another structural diagram of a touch display panel provided in an embodiment of the present application. Figure 7 As shown, Figure 6 Different from the illustrated embodiment, according to other embodiments of the present application, optionally, the non-display area NA may only include the first border area B1, and the first border area B1 and the display area AA are arranged in sequence along the first direction X. That is, the first border area B1 can be either a left border or a right border. The second touch sensing signal line TP2 and the third touch sensing signal line TP3 can both be wound around the first border area B1 and then connected to the touch chip. Similarly, the first touch drive signal line TP1' and the first touch sensing signal line TP1 can also be located in the first border area B1.

[0057] In this way, by routing both the second touch sensing signal line TP2 and the third touch sensing signal line TP3 to the first frame area B1 , the left frame or the right frame can be saved, satisfying the design of the touch display panel having only a single-side frame.

[0058] The inventors of the present application have further discovered that, compared with the sensing channel Rx using a single-sided lead, since a touch sensing signal line (such as the third touch sensing signal line TP3) is added at the other end of the sensing channel Rx, and the newly added third touch sensing signal line TP3 is closer to the first touch driving signal line TP1', signal crosstalk is likely to occur between the newly added third touch sensing signal line TP3 and the first touch driving signal line TP1'.

[0059] In view of the above findings, the present application considers adding a constant voltage signal line (Guard signal line) between the third touch sensing signal line TP3 and the first touch driving signal line TP1 ′ to shield the signal crosstalk between the third touch sensing signal line TP3 and the first touch driving signal line TP1 ′.

[0060] Figure 8 This is another structural diagram of a touch display panel provided in an embodiment of the present application. Figure 8 As shown, according to some embodiments of the present application, optionally, the touch display panel 20 may further include a constant voltage signal line V1, which may be used to transmit a constant voltage signal, that is, the potential on the constant voltage signal line V1 may remain constant. The constant voltage signal line V1 may be located between the third touch sensing signal line TP3 and the first touch driving signal line TP1'.

[0061] In this way, since the constant voltage signal line V1 is located between the third touch sensing signal line TP3 and the first touch driving signal line TP1', even if the third touch sensing signal line TP3 has signal fluctuations, it is difficult to affect the first touch driving signal line TP1'. Similarly, the first touch driving signal line TP1' is also difficult to affect the third touch sensing signal line TP3, thereby reducing the signal crosstalk between the third touch sensing signal line TP3 and the first touch driving signal line TP1'.

[0062] According to some embodiments of the present application, optionally, in order to ensure a better shielding effect of crosstalk, the third touch sensing signal line TP3, the first touch driving signal line TP1' and the constant voltage signal line V1 can be located in the same film layer. Of course, the third touch sensing signal line TP3, the first touch driving signal line TP1' and the constant voltage signal line V1 can also be located in different film layers, which is not limited in the embodiments of the present application.

[0063] Continue to see Figure 8 In some specific embodiments, the third touch sensing signal line TP3 may include at least a first routing segment Z1 extending along the second direction Y, and the first touch driving signal line TP1' may include at least a second routing segment Z2 extending along the second direction. The constant voltage signal line V1 may extend along the second direction Y, and the constant voltage signal line V1 may be located between the first routing segment Z1 and the second routing segment Z2. It should be noted that the constant voltage signal line V1 may also include multiple routing segments, as long as there is a routing segment located between the first routing segment Z1 and the second routing segment Z2, and the embodiments of the present application are not limited to this.

[0064] In this way, since most of the routing segments in the third touch sensing signal line TP3 are the first routing segments Z1, and most of the routing segments in the first touch driving signal line TP1' are the second routing segments Z2, the constant voltage signal line V1 is set between the first routing segment Z1 and the second routing segment Z2, which can effectively reduce the signal crosstalk between the third touch sensing signal line TP3 and the first touch driving signal line TP1'.

[0065] Continue to see Figure 6 According to some embodiments of the present application, the driving channel Tx may be electrically connected to the first touch driving signal line TP1', and the other end may be floating. That is, the driving channel Tx may adopt a single-ended lead, and only one end may be electrically connected to the first touch driving signal line TP1'.

[0066] Fig. 9 This is another structural diagram of a touch display panel provided in an embodiment of the present application. Fig. 9 As shown, Figure 6Different from the illustrated embodiment, according to other embodiments of the present application, optionally, the drive channel Tx may also adopt a double-ended lead. Specifically, the drive channel Tx may be electrically connected to the first touch drive signal line TP1', and the second end of the drive channel Tx may be electrically connected to the second touch drive signal line TP2'. Similar to the function of the first touch drive signal line TP1', the second touch drive signal line TP2' may be used to transmit a second touch drive signal. It should be noted that the first touch drive signal and the second touch drive signal may be the same, and the embodiments of the present application do not limit this.

[0067] As mentioned above, since the first special-shaped display area A21 is farthest from the touch chip, that is, the touch sensing signal generated by the sensing channel Rx in the first special-shaped display area A21 is most severely attenuated during the transmission process, the present application considers increasing the cross-sectional area of ​​the second touch sensing signal line TP2 and / or the third touch sensing signal line TP3 connected to the first special-shaped display area A21, so as to further reduce the attenuation degree of the touch sensing signal generated by the sensing channel Rx in the first special-shaped display area A21 during the transmission process.

[0068] Fig.10 This is another structural diagram of a touch display panel provided in an embodiment of the present application. Fig.10 As shown, according to some embodiments of the present application, optionally, the cross-sectional area of ​​the second touch sensing signal line TP2 and / or the third touch sensing signal line TP3 electrically connected to the sensing channel Rx in the first special-shaped display area A21 may be greater than the cross-sectional area of ​​the first touch sensing signal line TP1. For example, the width of the second touch sensing signal line TP2 and / or the third touch sensing signal line TP3 electrically connected to the sensing channel Rx in the first special-shaped display area A21 may be greater than the width of the first touch sensing signal line TP1. And / or, the thickness of the second touch sensing signal line TP2 and / or the third touch sensing signal line TP3 electrically connected to the sensing channel Rx in the first special-shaped display area A21 may be greater than the thickness of the first touch sensing signal line TP1.

[0069] In this way, by increasing the cross-sectional area of ​​the second touch sensing signal line TP2 and / or the third touch sensing signal line TP3 electrically connected to the sensing channel Rx in the first special-shaped display area A21, the impedance of the second touch sensing signal line TP2 and / or the third touch sensing signal line TP3 is reduced, and the attenuation degree of the touch sensing signal generated by the sensing channel Rx in the first special-shaped display area A21 during the transmission process is further reduced.

[0070] Continue to see Fig.10In some specific embodiments, optionally, the first special-shaped display area A21 may include, for example, M sensing channels Rx, the first ends of the M sensing channels Rx in the first special-shaped display area A21 may be electrically connected to the M second touch sensing signal lines TP2 in a one-to-one correspondence, the second ends of the M sensing channels Rx in the first special-shaped display area A21 may be electrically connected to the M third touch sensing signal lines TP3 in a one-to-one correspondence, and M is a positive integer.

[0071] The regular display area A1 may include N sensing channels Rx, and the first ends or the second ends of the N sensing channels Rx in the regular display area A1 are electrically connected to the N first touch sensing signal lines TP1 respectively.

[0072] Along the direction Y1 pointing from the first special-shaped display area A21 to the second special-shaped display area A22, the widths of the M second touch sensing signal lines TP2 and the N first touch sensing signal lines TP1 decrease in sequence; and / or, along the direction Y1 pointing from the first special-shaped display area A21 to the second special-shaped display area A22, the widths of the M third touch sensing signal lines TP3 and the N first touch sensing signal lines TP1 decrease in sequence.

[0073] In this way, as the distance from the touch chip increases, that is, as the routing length of the second touch sensing signal line TP2 and / or the third touch sensing signal line TP3 increases, the width of the second touch sensing signal line TP2 and / or the third touch sensing signal line TP3 gradually increases, so that the impedances of different second touch sensing signal lines TP2 and / or different third touch sensing signal lines TP3 are the same or similar, so that the attenuation degrees of the touch sensing signals generated by different sensing channels Rx are the same or similar, thereby increasing touch uniformity.

[0074] Continue to see Figure 2 Each driving channel Tx may include a plurality of touch driving electrodes p1 arranged in sequence along the second direction Y and electrically connected to each other, and each sensing channel Rx may include a plurality of touch sensing electrodes p2 arranged in sequence along the first direction X and electrically connected to each other.

[0075] For the sake of convenience, the touch sensing electrode p2 at the edge of the sensing channel Rx in the irregular display area A2 is called the target sensing electrode mp2. Since the target sensing electrode mp2 is cut, the area of ​​the target sensing electrode mp2 is smaller than the area of ​​the touch sensing electrode p2 in the regular display area A1.

[0076] The minimum distance between the target sensing electrode mp2 and the touch driving electrode p1 may be smaller than the minimum distance between the touch sensing electrode p2 and the touch driving electrode p1 in the regular display area A1. In this way, by reducing the minimum distance between the target sensing electrode mp2 and the touch driving electrode p1, the sensing capacitance between the target sensing electrode mp2 and the touch driving electrode p1 is increased, that is, the strength of the touch sensing signal generated by the target sensing electrode mp2 is increased, further ensuring that the touch chip can accurately detect the touch sensing signal generated by the sensing channel in the special-shaped display area, thereby improving the accuracy of touch detection.

[0077] It should be noted that, in some examples, the touch sensing electrode p2 and the touch driving electrode p1 may be located in the same film layer, and the minimum distance between the target sensing electrode mp2 and the touch driving electrode p1 may be a straight line distance along a direction parallel to the plane where the touch display panel is located (such as the first direction X shown in the figure).

[0078] Fig.11 A cross-sectional schematic diagram of a touch display panel provided in an embodiment of the present application. Fig.11 As shown, according to some embodiments of the present application, optionally, the touch display panel 20 includes a substrate 01, a drive device layer 02, a light-emitting layer 03, an encapsulation layer 04 and a touch function layer 05 which are stacked. The substrate 01 can be a hard substrate made of materials such as glass or plastic, or a flexible substrate made of materials such as polyethersulfone (PES), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyarylate, polyimide (PI), polycarbonate (PC) or cellulose acetate propionate (CAP). The drive device layer 02 can be used to set electronic devices such as thin film transistors. The light-emitting layer 03 can be used to set light-emitting materials. The encapsulation layer 04 may include a laminated structure of an inorganic encapsulation layer and an organic encapsulation layer. Among them, the material of the inorganic encapsulation layer includes but is not limited to at least one of silicon oxide, silicon nitride and silicon oxynitride. The material of the organic encapsulation layer includes, but is not limited to, at least one of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), polyimide (PI), polyethersulfone (PES), polyoxymethylene (POM), polyarylate and hexamethyldisiloxane (HMDSO). The touch function layer 05 can be formed above the encapsulation layer 04, that is, on the side away from the substrate 01.

[0079] Combination Figure 2 and Fig.11 As shown, the driving channel Tx, the sensing channel Rx, the first touch sensing signal line TP1 , the second touch sensing signal line TP2 and the third touch sensing signal line TP3 may all be located in the touch function layer 05 .

[0080] In this way, since the driving channel Tx, the sensing channel Rx, the first touch sensing signal line TP1, the second touch sensing signal line TP2 and the third touch sensing signal line TP3 are all arranged above the packaging layer 04, that is, away from the side of the substrate 01, the signal crosstalk between the touch electrodes and touch wiring in the touch function layer 05 and the electronic devices in the driving device layer 02 can be reduced.

[0081] Continue to see Fig.11 In some specific embodiments, the touch function layer 05 may include a first touch conductive layer 051, a touch insulating layer 052, and a second touch conductive layer 053. Exemplarily, the materials of the first touch conductive layer 051 and the second touch conductive layer 053 may include transparent metal oxides such as indium tin oxide (ITO), and the material of the touch insulating layer 052 may include inorganic materials such as silicon oxide or silicon nitride.

[0082] Along the direction Z perpendicular to the plane where the touch display panel is located, the first touch conductive layer 051 can be located between the touch insulating layer 052 and the encapsulation layer 04. The touch sensing electrode p2 and the touch driving electrode p1 can be located in the second touch conductive layer 053. The touch insulating layer 052 is provided with a via k, and any two adjacent touch sensing electrodes p2 in the same sensing channel Rx are electrically connected through the via k and the bridge unit q located in the first touch conductive layer 051. It should be noted that in other embodiments, the touch sensing electrode p2 and the touch driving electrode p1 can also be located in the first touch conductive layer 051, and the bridge unit q is located in the second touch conductive layer 053, which is not limited in the embodiment of the present application.

[0083] The first touch sensing signal line TP1, the second touch sensing signal line TP2 and the third touch sensing signal line TP3 may be located in the first touch conductive layer 051 and / or the second touch conductive layer 053. That is, the first touch sensing signal line TP1, the second touch sensing signal line TP2 and the third touch sensing signal line TP3 may be located in the first touch conductive layer 051, the second touch conductive layer 053, or both of the first touch conductive layer 051 and the second touch conductive layer 053. Similarly, the first touch driving signal line TP1' and the second touch driving signal line TP2' may also be located in the first touch conductive layer 051 and / or the second touch conductive layer 053.

[0084] Based on the touch display panel 20 provided in the above embodiment, the present application also provides a touch display device, including the touch display panel provided in the present application. Fig.12 , Fig.12 A schematic diagram of the structure of a touch display device provided in an embodiment of the present application. Fig.12The provided touch display device 1000 includes the touch display panel 20 provided by any of the above embodiments of the present application. Fig.12 In the embodiment, a mobile phone is used as an example to illustrate the touch display device 20. It can be understood that the touch display device provided in the embodiment of the present application can be a wearable device (such as a watch), a computer, a television, a car-mounted touch display device, or other touch display devices with display functions, and the present application does not impose specific restrictions on this. The touch display device provided in the embodiment of the present application has the beneficial effects of the array substrate provided in the embodiment of the present application. For details, reference can be made to the specific description of the array substrate in the above embodiments, and this embodiment will not be repeated here.

[0085] It should be understood that the top view structure of the touch display panel and the cross-sectional structure of the touch display panel provided in the drawings of the embodiments of the present application are only some examples and are not used to limit the present application. In addition, the above embodiments provided in the present application can be combined with each other if there is no contradiction.

[0086] According to the embodiments described above in the present application, these embodiments do not describe all the details in detail, nor do they limit the present application to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A touch display panel, It is characterized in that The touch display panel includes a display area, the display area includes a plurality of driving channels arranged at intervals along a first direction and a plurality of sensing channels arranged at intervals along a second direction, the first direction intersecting the second direction; The display area includes a regular display area and a special-shaped display area, the regular display area and the special-shaped display area are arranged in sequence along the second direction, and the special-shaped display area is located on at least one side of the regular display area; The area of ​​the sensing channel in the irregular display area is smaller than the area of ​​the sensing channel in the regular display area; The first end or the second end of the sensing channel in the regular display area is electrically connected to the first touch sensing signal line; the first end of the sensing channel in the special-shaped display area is electrically connected to the second touch sensing signal line, and the second end of the sensing channel in the special-shaped display area is electrically connected to the third touch sensing signal line; The irregular display area includes a first irregular display area and a second irregular display area, the touch display panel also includes a non-display area, the non-display area includes a binding area, and the first irregular display area, the regular display area, the second irregular display area and the binding area are arranged in sequence along the second direction; The cross-sectional area of ​​the second touch sensing signal line and / or the third touch sensing signal line electrically connected to the sensing channel in the first special-shaped display area is larger than the cross-sectional area of ​​the first touch sensing signal line.

2. The touch display panel according to claim 1, It is characterized in that The binding area is used to bind a touch chip or a flexible circuit board; The first end of the sensing channel in the first special-shaped display area is electrically connected to the second touch sensing signal line, and the second end of the sensing channel in the first special-shaped display area is electrically connected to the third touch sensing signal line.

3. The touch display panel according to claim 2, It is characterized in that One end of the sensing channel in the second special-shaped display area is electrically connected to the second touch sensing signal line, and the other end is floating; Alternatively, the first end of the sensing channel in the second special-shaped display area is electrically connected to the second touch sensing signal line, and the second end of the sensing channel in the second special-shaped display area is electrically connected to the third touch sensing signal line.

4. The touch display panel according to claim 3, It is characterized in that The non-display area further includes a step area, and along the second direction, the step area is located between the display area and the binding area; The second touch sensing signal line and / or the third touch sensing signal line electrically connected to the sensing channel in the second special-shaped display area are located in the step area.

5. The touch display panel according to claim 1, It is characterized in that The touch display panel further includes a non-display area, the non-display area includes a first frame area and a second frame area, and along the first direction, the first frame area, the display area and the second frame area are arranged in sequence; The driving channel is electrically connected to a first touch driving signal line, and the first touch driving signal line is used to receive a first touch driving signal; The second touch sensing signal line is located in the first frame area, and the third touch sensing signal line and the first touch driving signal line are located in the second frame area.

6. The touch display panel according to claim 1, It is characterized in that The touch display panel further includes a non-display area, the non-display area includes a first frame area, and along the first direction, the first frame area and the display area are arranged in sequence; The driving channel is electrically connected to a first touch driving signal line, and the first touch driving signal line is used to receive a first touch driving signal; The second touch sensing signal line, the third touch sensing signal line and the first touch driving signal line are all located in the first border area.

7. The touch display panel according to claim 5 or 6, It is characterized in that The touch display panel further includes a constant voltage signal line, and the constant voltage signal line is located between the third touch sensing signal line and the first touch driving signal line.

8. The touch display panel according to claim 7, It is characterized in that The third touch sensing signal line, the first touch driving signal line and the constant voltage signal line are located in the same film layer; The third touch sensing signal line includes at least a first routing segment extending along the second direction, the first touch driving signal line includes at least a second routing segment extending along the second direction, and the constant voltage signal line extends along the second direction and is located between the first routing segment and the second routing segment.

9. The touch display panel according to claim 5 or 6, It is characterized in that One end of the driving channel is electrically connected to the first touch driving signal line, and the other end is floating; Alternatively, the first end of the driving channel is electrically connected to the first touch driving signal line, and the second end of the driving channel is electrically connected to a second touch driving signal line, and the second touch driving signal line is used to receive a second touch driving signal.

10. The touch display panel according to claim 2, It is characterized in that The first special-shaped display area includes M sensing channels, the first ends of the M sensing channels in the first special-shaped display area are electrically connected to the M second touch sensing signal lines in a one-to-one correspondence, and the second ends of the M sensing channels in the first special-shaped display area are electrically connected to the M third touch sensing signal lines in a one-to-one correspondence, and M is a positive integer; The regular display area includes N sensing channels, and the first ends or the second ends of the N sensing channels in the regular display area are electrically connected to the N first touch sensing signal lines respectively; Along the direction from the first special-shaped display area to the second special-shaped display area, the widths of the M second touch sensing signal lines and the N first touch sensing signal lines decrease in sequence; and / or, Along the direction from the first special-shaped display area to the second special-shaped display area, the widths of the M third touch sensing signal lines and the N first touch sensing signal lines decrease in sequence.

11. The touch display panel according to claim 1, It is characterized in that The sensing channel comprises a plurality of sensing electrodes arranged in sequence along the first direction and electrically connected to each other, and the driving channel comprises a plurality of driving electrodes arranged in sequence along the second direction and electrically connected to each other; The sensing electrodes located at the edges of the sensing channels in the irregular display area are target sensing electrodes, and the area of ​​the target sensing electrodes is smaller than the area of ​​the sensing electrodes in the regular display area; The minimum distance between the target sensing electrode and the driving electrode is smaller than the minimum distance between the sensing electrode and the driving electrode in the regular display area.

12. The touch display panel according to claim 1, It is characterized in that The touch display panel comprises a substrate, a driving device layer, a light emitting layer, a packaging layer and a touch function layer which are stacked; The driving channel, the sensing channel, the first touch sensing signal line, the second touch sensing signal line and the third touch sensing signal line are all located in the touch function layer.

13. The touch display panel according to claim 12, It is characterized in that The touch function layer includes a first touch conductive layer, a touch insulating layer, and a second touch conductive layer which are stacked; The sensing channel includes a plurality of touch sensing electrodes arranged in sequence along the first direction and electrically connected to each other, and the driving channel includes a plurality of touch driving electrodes arranged in sequence along the second direction and electrically connected to each other; The touch sensing electrodes and the touch driving electrodes are both located in the second touch conductive layer, the touch insulating layer is provided with vias, and any two adjacent touch sensing electrodes in the same sensing channel are electrically connected to each other through the vias and the bridge units located in the first touch conductive layer; The first touch sensing signal line, the second touch sensing signal line and the third touch sensing signal line are located in the first touch conductive layer and / or the second touch conductive layer.

14. A touch display device, It is characterized in that It comprises the touch display panel as claimed in any one of claims 1 to 13.

Images