Touch display panel and touch module

Abstract

A touch display panel, comprising a substrate, and a driving layer, a light-emitting layer and a packaging layer that are stacked on the substrate. A touch layer is provided on the packaging layer. A first touch channel extending along a first direction and a second touch channel extending along a second direction are provided on the touch layer, and the first direction and the second direction are arranged crosswise. The touch layer comprises a touch region and a non-touch region located at the periphery of the touch region; and the touch region comprises a central region and a touch edge region located at the periphery of the central region. The first touch channel comprises multiple first sub-touch channels located in the central region and multiple second sub-touch channels located in the touch edge region, and the width of the first sub-touch channels is greater than that of the second sub-touch channels. The second touch channel comprises multiple third sub-touch channels located in the central region and multiple fourth sub-touch channels located in the touch edge region, and the width of the third sub-touch channels is greater than that of the fourth sub-touch channels. The present invention further relates to a touch module.

Description

Touch display panel and touch module

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411545296.5, filed in China on October 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of display product manufacturing technology, and in particular to a touch display panel and a touch module. Background Technology

[0004] For edge touch channels, especially the outermost touch channel, since there are only periodically arranged touch channels on one side (left, right, top, or bottom), the touch IC's differential or other noise reduction methods are less effective than those in the AA area when processing edge position signals. At the same time, when calculating coordinates, only one side of the touch electrode is used to calculate the weight of the reported coordinates, which reduces the writing accuracy of the pen tip at the edge position and may even cause broken lines or flying lines in some parts of the display screen. Summary of the Invention

[0005] To address the aforementioned technical problems, this disclosure provides a touch display panel and a touch module, which solve the problem of low accuracy in the touch edge area.

[0006] To achieve the above objectives, the technical solution adopted in this embodiment is: a touch display panel, including a substrate, a driving layer, a light-emitting layer and an encapsulation layer stacked sequentially on the substrate, a touch layer disposed on the encapsulation layer, a first touch channel extending along a first direction and a second touch channel extending along a second direction disposed on the touch layer, the first direction and the second direction being intersected;

[0007] The touch layer includes a touch area and a non-touch area located around the touch area. The touch area includes a central region and a touch edge region located around the central region.

[0008] The first touch channel includes a plurality of first sub-touch channels located in the central region and a plurality of second sub-touch channels located in the touch edge region, wherein the width of the first sub-touch channels is greater than the width of the second sub-touch channels;

[0009] The second touch channel includes a plurality of third sub-touch channels located in the central region and a plurality of fourth sub-touch channels located in the touch edge region, wherein the width of the third sub-touch channels is greater than the width of the fourth sub-touch channels.

[0010] Optionally, the width of the second sub-touch channel is 1 / 2, 1 / 3, or 1 / 4 of the width of the first sub-touch channel;

[0011] The width of the fourth sub-touch channel is 1 / 2, 1 / 3, or 1 / 4 of that of the third sub-touch channel.

[0012] Optionally, the sum of the widths of all the second sub-channels is n times the width of the first sub-touch channel;

[0013] The sum of the widths of all the fourth sub-channels is n times the width of the third sub-touch channel;

[0014] Where n is a positive integer.

[0015] Optionally, the width of the first sub-touch channel is 4.5 to 6 mm, and the width of the second sub-touch channel is 1 to 3 mm;

[0016] The width of the third sub-touch channel is 4.5–6 mm, and the width of the fourth sub-touch channel is 1–3 mm.

[0017] Optionally, the first touch channel includes a plurality of first touch electrodes, and the second touch channel includes a plurality of second touch electrodes;

[0018] The central region includes multiple first touch repeating units, and the touch edge region includes multiple second touch repeating units. Each first touch repeating unit includes M1 first touch electrodes and N1 second touch electrodes, and each second touch repeating unit includes M2 first touch electrodes and N2 second touch electrodes. M1 is m times M2, N1 is m times N2, and M1, M2, N1, and N2 are all positive integers, and m is a positive integer greater than 1.

[0019] Optionally, the touch edge region includes a first sub-touch edge region located on opposite sides of the central region in the first direction, and a second sub-touch edge region located on opposite sides of the central region in the second direction. The overlapping area of ​​the adjacent first sub-touch edge region and the second sub-touch edge region includes a third touch repeating unit. The third touch repeating unit includes M3 first touch electrodes and N3 second touch electrodes, where M2 is m times M3, N2 is m times N3, M3 and N3 are both positive integers, and m is a positive integer greater than 1.

[0020] Optionally, in the first direction, a plurality of first touch signal lines are provided on at least one side of the non-touch area located in the touch area; in the second direction, a plurality of second touch signal lines are provided on at least one side of the non-touch area located in the touch area.

[0021] Each of the first touch channels has at least one end connected to a corresponding first touch signal line in its extension direction, the first touch signal line including a first sub-touch signal line connected to the first sub-touch channel and a second sub-touch channel connected to the second sub-touch channel;

[0022] Each of the second touch channels has a second touch signal line connected to at least one end in its extension direction, the second touch signal line including a third sub-touch signal line connected to the third sub-touch channel and a fourth sub-touch signal line connected to the fourth sub-touch channel.

[0023] Optionally, the first touch channel is a sensing electrode channel, and the touch display panel further includes a multiplexing circuit, which includes a first switching circuit and a second switching circuit.

[0024] The first switching circuit includes a plurality of first switching transistors, and the plurality of first switching transistors are configured in a one-to-one correspondence with a plurality of second sub-touch signal lines;

[0025] The second switching circuit includes a plurality of second switching transistors, each of which is connected to at least two second sub-touch signal lines.

[0026] Optionally, it also includes a first selection control unit, used to select whether the first switching circuit or the second switching circuit is working based on the signal strength of the second sub-touch signal line.

[0027] Optionally, it also includes a signal processing unit for summing the signals of the multiple second sub-touch channels.

[0028] Optionally, it also includes a second selection control unit, which is used to select to independently process the signals of the second sub-touch channel in active pen touch mode, and to select the second switch circuit to work in finger touch mode, or to select to sum the signals of multiple second sub-touch channels.

[0029] This disclosure provides a touch module, including the touch display panel described above.

[0030] The beneficial effects of this disclosure are as follows: The touch display panel provided in this disclosure includes a first touch channel and a second touch channel arranged in an intersecting manner. The first touch channel includes a first sub-touch channel located in the touch center area and a second sub-touch channel located in the touch edge area. The width of the first sub-touch channel is greater than the width of the second sub-touch channel. The second touch channel includes a third sub-touch channel located in the touch center area and a fourth sub-touch channel located in the touch edge area. The width of the third sub-touch channel is greater than the width of the fourth sub-touch channel. This reduces the signal-to-noise ratio of the active pen at the touch channel position in the touch edge area, while increasing the number of touch channels in the touch edge area. This improves the resolution accuracy of the touch chip for the coordinates of the touch edge area, further improving the touch accuracy in the touch edge area and the line drawing accuracy of the stylus. Attached Figure Description

[0031] Figure 1 is a schematic diagram of a touch display panel in an embodiment of this disclosure;

[0032] Figure 2 is a schematic diagram of the touch display panel in an embodiment of this disclosure;

[0033] Figure 3 shows a schematic diagram of the first touch repeating unit;

[0034] Figure 4 shows a schematic diagram of the second touch repeating unit;

[0035] Figure 5 shows a schematic diagram of the second touch repeating unit;

[0036] Figure 6 shows a schematic diagram of the third touch repeating unit;

[0037] Figure 7 is a schematic diagram of the touch display panel in an embodiment of this disclosure;

[0038] Figure 8 is a schematic diagram of the touch display panel in an embodiment of this disclosure;

[0039] Figure 9 shows a schematic diagram of the first touch repeating unit;

[0040] Figure 10 shows a schematic diagram of the second touch repeating unit;

[0041] Figure 11 shows a schematic diagram of the second touch repeating unit;

[0042] Figure 12 shows a schematic diagram of the third touch repeating unit;

[0043] Figure 13 shows a schematic diagram of a multiplexing circuit;

[0044] Figure 14 shows a schematic diagram of the touch display panel;

[0045] Figure 15 shows a schematic diagram of the connection between the first selection control unit and the multiplexing circuit. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0047] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0048] The features such as "parallel," "perpendicular," and "identical" used in the embodiments of this disclosure include features in the strict sense of "parallel," "perpendicular," and "identical," as well as cases where "approximately parallel," "approximately perpendicular," and "approximately identical" include certain tolerances. Taking into account the measurement and the tolerances associated with the measurement of a specific quantity (e.g., limitations of the measurement system), they represent the acceptable deviation range for a specific value as determined by a person skilled in the art. For example, "approximately" can mean within one or more standard deviations, or within 3% or 5% of said value.

[0049] In related technologies, a touch display panel includes a first touch channel and a second touch channel arranged intersecting each other. The touch area includes a touch center area and a touch edge area. The width of the first touch channel located in the touch center area is the same as the width of the first touch channel located in the touch edge area. In a direction perpendicular to the extension direction of the first touch channel, the touch edge area includes a first side edge area and a second side edge area, each with only one first touch channel. Similarly, the width of the second touch channel located in the touch center area is the same as the width of the second touch channel located in the touch edge area. In a direction perpendicular to the extension direction of the second touch channel, the touch edge area includes a third side edge area and a fourth side edge area, each with only one second touch channel. This results in the IC processing edge position signals with differential or other noise reduction methods being less effective than within the AA area. Furthermore, during coordinate calculation, only one electrode is used for point coordinate weighting, leading to reduced pen tip writing accuracy at the edge position, and even broken lines or flying lines appearing in some parts of the display screen.

[0050] Referring to Figures 1-14, in order to address the above-mentioned problems, this embodiment provides a touch display panel, including a substrate 300, a driving layer 301, a light-emitting layer 302, and an encapsulation layer 303 stacked sequentially on the substrate 300. A touch layer 304 is disposed on the side of the encapsulation layer 303 away from the substrate. A first touch channel 1 extending along a first direction and a second touch channel 2 extending along a second direction are disposed on the touch layer 304. The first direction and the second direction are intersected.

[0051] The touch layer 304 includes a touch area and a non-touch area located around the touch area. The touch area includes a touch center area 101 and a touch edge area 102.

[0052] The first touch channel 1 includes a plurality of first sub-touch channels 11 located in the touch center area 101 and a plurality of second sub-touch channels 12 located in the touch edge area 102, wherein the width of the first sub-touch channel 11 is greater than the width of the second sub-touch channel 12.

[0053] The second touch channel 2 includes a plurality of third sub-touch channels 21 located in the touch center area 101 and a plurality of fourth sub-touch channels 22 located in the touch edge area 102, wherein the width of the third sub-touch channel 21 is greater than the width of the fourth sub-touch channel 22.

[0054] By adopting the above solution, the width of the second sub-touch channel 12 located in the touch edge area 102 is reduced relative to the first sub-touch channel 11 located in the touch center area 101, and the width of the fourth sub-touch channel 22 located in the touch edge area 102 is reduced relative to the third sub-touch channel 21 located in the touch center area 101. Compared with related technologies, this increases the number of second sub-touch channels 12 and the number of fourth sub-touch channels 22 located in the touch edge area 102, reduces the capacitive load of a single touch channel, reduces the impact of display noise, improves the resolution of the sensor at the edge position, and achieves higher stylus writing accuracy.

[0055] When the touch display panel is assembled with the display panel, the touch area corresponds to the display area of ​​the display panel. By adopting the above solution, it is not necessary to expand the size of the touch area so that the area of ​​the touch area is larger than the area of ​​the display area, thereby improving the touch accuracy of the touch edge area 102 and enabling the narrow bezel setting of the display device with touch function.

[0056] It should be noted that the first touch channel 1 has a length as its extension direction, and a width as its direction perpendicular to the extension direction of the first touch channel 1. Similarly, the second touch channel 2 has a length as its extension direction, and a width as its direction perpendicular to the extension direction of the second touch channel 2.

[0057] For example, in order to make the width of the first sub-touch channel 11 greater than the width of the second sub-channel, the width of the second sub-touch channel 12 located in the touch edge area 102 can be directly reduced, changing one second sub-touch channel 12 located in the touch edge area 102 into at least two second sub-touch channels 12.

[0058] For example, in order to make the width of the first sub-touch channel 11 greater than the width of the second sub-channel, the width of the second sub-touch channel 12 located in the touch edge area 102 can be directly reduced to increase the number of second sub-touch channels 12 located in the touch edge area 102, while increasing the width of the first sub-touch channel 11 located in the touch center area 101.

[0059] It should be noted that each of the first touch channels 1 is connected to at least one touch trace. The number of second sub-touch channels 12 located in the touch edge area 102 has increased, and the number of touch traces connected to the second sub-touch channels 12 has also increased accordingly. At the same time, increasing the width of the first sub-touch channels 11 located in the touch center area 101 can reduce the number of first sub-touch channels 11 located in the touch center area 101, and correspondingly reduce the number of touch traces connected to the first sub-touch channels 11. This can offset the increase in the number of touch traces caused by the increase in the number of second sub-touch channels 12 in the touch edge area 102. Thus, for the touch chip, there is no need to change the original settings of the touch chip.

[0060] In an exemplary embodiment, the width of the first sub-touch channel 11 is 4.5 to 6 mm, and the width of the second sub-touch channel 12 is 1 to 3 mm, but is not limited thereto.

[0061] For example, in order to make the width of the third sub-touch channel 21 greater than the width of the second sub-channel, the width of the fourth sub-touch channel 22 located in the touch edge area 102 can be directly reduced, changing one fourth sub-touch channel 22 located in the touch edge area 102 into at least two fourth sub-touch channels 22.

[0062] For example, in order to make the width of the third sub-touch channel 21 greater than the width of the second sub-channel, the width of the fourth sub-touch channel 22 located in the touch edge area 102 can be directly reduced to increase the number of fourth sub-touch channels 22 located in the touch edge area 102, while increasing the width of the third sub-touch channel 21 located in the touch center area 101.

[0063] It should be noted that each of the first touch channels 1 is connected to at least one touch trace. The number of fourth sub-touch channels 22 located in the touch edge area 102 has increased, and the number of touch traces connected to the fourth sub-touch channels 22 has also increased accordingly. At the same time, increasing the width of the third sub-touch channel 21 located in the touch center area 101 can reduce the number of third sub-touch channels 21 located in the touch center area 101, and correspondingly reduce the number of touch traces connected to the third sub-touch channels 21. This can offset the increase in the number of touch traces caused by the increase in the number of fourth sub-touch channels 22 in the touch edge area 102. Thus, for the touch chip, there is no need to change the original settings of the touch chip.

[0064] In an exemplary embodiment, the width of the third sub-touch channel 21 is 4.5 to 6 mm, and the width of the fourth sub-touch channel 22 is 1 to 3 mm, but is not limited thereto.

[0065] In some embodiments, the width of the first sub-touch channel 11 is equal to the width of the third sub-touch channel 21, and the width of the second sub-touch channel 12 is equal to the width of the fourth sub-touch channel 22.

[0066] In an exemplary embodiment, the width of the second sub-touch channel 12 is 1 / 2, 1 / 3, or 1 / 4 of the width of the first sub-touch channel 11;

[0067] The width of the fourth sub-touch channel 22 is 1 / 2, 1 / 3, or 1 / 4 of the width of the third sub-touch channel 21.

[0068] Figures 1-6 show that the width of the second sub-touch channel 12 is half that of the first sub-touch channel 11; and the width of the fourth sub-touch channel 22 is half that of the third sub-touch channel 21. Figures 7-12 show that the width of the second sub-touch channel 12 is one-third that of the first sub-touch channel 11; and the width of the fourth sub-touch channel 22 is one-third that of the third sub-touch channel 21.

[0069] In an exemplary embodiment, the sum of the widths of all the second sub-channels is n times the width of the first sub-touch channel 11;

[0070] The sum of the widths of all the fourth sub-channels is n times the width of the third sub-touch channel 21;

[0071] Where n is a positive integer.

[0072] In an exemplary implementation, n is 1, 2, or 3, but is not limited thereto.

[0073] By reducing the width of the second sub-touch channel 12 and the fourth sub-touch channel 22, the number of the second sub-touch channels 12 and the fourth sub-touch channel 22 located in the touch edge area 102 is increased, improving the touch accuracy of active pen touch. However, this reduces the signal strength, which is detrimental to finger touch. Using the above solution, the touch signal strength of the touch edge area 102 can be increased by shorting electrodes or by signal summing, and the mutual capacitance data located in the touch edge area 102 can be kept as consistent as possible with the capacitance parameters of the internal mutual capacitance nodes, reducing the complexity of the finger reporting algorithm. For example, when n is 1, the signals of all the second sub-touch channels 12 located in the touch edge area 102 can be summed.

[0074] In an exemplary embodiment, the first touch channel 1 includes a plurality of first touch electrodes 100, and the second touch channel 2 includes a plurality of second touch electrodes 200.

[0075] The touch center area 101 includes a plurality of first touch repeating units, and the touch edge area 102 includes a plurality of second touch repeating units. Each first touch repeating unit includes M1 first touch electrodes 100 and N1 second touch electrodes 200, and each second touch repeating unit includes M2 first touch electrodes 100 and N2 second touch electrodes 200. M1 is m times M2, N1 is m times N2, and M1, M2, N1, and N2 are all positive integers, and m is a positive integer greater than 1.

[0076] The first touch electrode 100 is triangular in shape, and two first touch electrodes 100 form a complete square first electrode block. In the first direction, adjacent first electrode blocks are connected by a connecting line. Similarly, the second touch electrode 200 is triangular in shape, and two second touch electrodes 200 form a complete square second electrode block. In the second direction, adjacent second electrode blocks are connected by a connecting line. It should be noted that the shapes of the first touch electrode 100 and the second touch electrode 200 are not limited to triangles; for example, they can also be semi-circular, etc.

[0077] In some embodiments, the width of the second sub-touch channel 12 is half the width of the first sub-touch channel 11, the number of the first touch electrodes 100 in the first touch repeating unit is twice the number of the first touch electrodes 100 in the second touch repeating unit, M1 is twice M2, and N1 is twice N2, see Figures 1 and 2.

[0078] In some embodiments, the width of the second sub-touch channel 12 is 1 / 3 of the width of the first sub-touch channel 11, the number of the first touch electrodes 100 in the first touch repeating unit is 3 times the number of the first touch electrodes 100 in the second touch repeating unit, M1 is 3 times M2, and N1 is 3 times N2, see Figures 7 and 8.

[0079] In an exemplary embodiment, the touch edge area 102 includes a first sub-touch edge area located on opposite sides of the touch center area 101 in the first direction, and a second sub-touch edge area located on opposite sides of the touch center area 101 in the second direction. The overlapping area (i.e., the corner area 1001) of the adjacent first sub-touch edge area 102 and second sub-touch edge area 102 includes a third touch repeating unit. The third touch repeating unit includes M3 first touch electrodes 100 and N3 second touch electrodes 200, where M2 is m times M3, N2 is m times N3, M3 and N3 are both positive integers, and m is a positive integer greater than 1.

[0080] In some embodiments, the width of the second sub-touch channel 12 is half the width of the first sub-touch channel 11, the number of the first touch electrodes 100 in the second touch repeating unit is twice the number of the first touch electrodes 100 in the third touch repeating unit, M2 is twice M3, and N2 is twice N3. Figure 3 shows a schematic diagram of the first touch repeating unit, Figure 4 shows a schematic diagram of the second touch repeating unit in the sub-edge region located on opposite sides of the touch center region in the touch edge region in the first direction, Figure 5 shows a schematic diagram of the second touch repeating unit in the sub-edge region located on opposite sides of the touch center region in the touch edge region in the second direction, and Figure 6 shows a schematic diagram of the third touch repeating unit.

[0081] In some embodiments, the width of the second sub-touch channel 12 is 1 / 3 of the width of the first sub-touch channel 11, the number of the first touch electrodes 100 in the second touch repeating unit is 3 times the number of the first touch electrodes 100 in the third touch repeating unit, M2 is 3 times M3, and N2 is 3 times N3. Figure 9 shows a schematic diagram of the second touch repeating unit in the sub-edge region located on opposite sides of the touch center region in the touch edge region in the first direction. Figure 10 shows a schematic diagram of the second touch repeating unit in the sub-edge region located on opposite sides of the touch center region in the touch edge region in the second direction. Figure 11 shows a schematic diagram of the third touch repeating unit.

[0082] In an exemplary embodiment, at least one end of the first touch channel 1 in its extension direction is connected to a first touch signal line, the first touch signal line including a first sub-touch signal line connected to the first sub-touch channel 11, and a second sub-touch channel 12 connected to the second sub-touch channel 12;

[0083] The second touch channel 2 has a second touch signal line connected to at least one end in its extension direction. The second touch signal line includes a third sub-touch signal line connected to the third sub-touch channel 21 and a fourth sub-touch signal line connected to the fourth sub-touch channel 22.

[0084] Referring to Figures 13 and 15, in an exemplary embodiment, the first touch channel 1 is a sensing electrode channel, and the touch display panel further includes a multiplexing circuit, which includes a first switching circuit 402 and a second switching circuit 403.

[0085] The first switching circuit 402 includes a plurality of first switching transistors, and the plurality of first switching transistors are configured in a one-to-one correspondence with a plurality of second sub-touch signal lines;

[0086] The second switching circuit 403 includes a plurality of second switching transistors, each of which is connected to at least two second sub-touch signal lines.

[0087] Using the above scheme, the signals of multiple second sub-touch channels 12 located in the touch edge area 102 can be independently received and processed by the first switching circuit 402. When the first signal G1 is applied to the multiplexing circuit, the first switching transistors T1 and T2 are turned on, and the signals of the second sub-touch channels can be received independently. Alternatively, the signals of multiple second sub-touch channels 12 located in the touch edge area 102 can be received and processed together by the second switching circuit 403, and different touch modes can be switched. When the second signal G2 is applied to the multiplexing circuit, the second switching transistors T3 and T4 are turned on, but the second switching transistors T3 and T4 are shorted together, and the signals of multiple second sub-touch channels can be received together.

[0088] In an exemplary embodiment, the touch display panel further includes a first selection control unit 401, which is used to select whether the first switching circuit 402 or the second switching circuit 403 is working based on the signal strength of the second sub-touch signal line.

[0089] When the signal of the second sub-touch signal line is weak, the second switching circuit can be selected to receive the signals of multiple second sub-touch channels 12 together to increase the touch signal strength. When the signal of the second sub-touch signal line is strong enough, the second switching circuit can be selected to receive the signals of multiple second sub-touch channels 12 together, or the first switching circuit can be selected to receive and process the signals of multiple second sub-touch channels 12 independently.

[0090] In an exemplary embodiment, the touch display panel further includes a signal processing unit 500, used to sum the signals of the plurality of second sub-touch channels 12 (i.e., to superimpose the signals of the plurality of second sub-touch channels 12). That is, without changing the circuit structure, the summation of the signals of the plurality of second sub-touch channels 12 is achieved through software algorithms.

[0091] In an exemplary embodiment, the touch display panel further includes a second selection control unit, which selects different signal processing methods in different touch modes. For example, in active pen touch mode, multiple second sub-touch channels work independently, and in finger touch mode, multiple second sub-touch channels are short-circuited or the signals of multiple second sub-touch channels are summed.

[0092] Specifically, in the embodiment with a multiplexing circuit, the second selection control unit is used to select the first switching circuit to operate in active pen touch mode, independently receiving and processing the signals of the multiple second sub-touch channels 12 located in the touch edge area 102, and in finger touch mode, to select the second switching circuit to operate, receiving and processing the signals of the multiple second sub-touch channels 12 located in the touch edge area 102 together; in the embodiment without a multiplexing circuit, the second selection control unit is used to select to independently process the signals of the multiple second sub-touch channels in active pen touch mode, and to select to sum the signals of the multiple second sub-touch channels in finger touch mode.

[0093] In the above embodiments, multiple second sub-touch channels are short-circuited or driven synchronously, while multiple fourth sub-touch channels perform independent reception and signal processing without short-circuiting or signal summation. This method can enhance the signal resolution of the multiple second sub-touch channels. In some embodiments, multiple fourth sub-touch channels can be short-circuited or driven synchronously, while multiple second sub-touch channels perform independent reception and signal processing without short-circuiting or signal summation. This method can also enhance the signal resolution of the multiple fourth sub-touch channels. In some embodiments, the signal processing methods of multiple second sub-touch channels and multiple fourth sub-touch channels can be the same, for example, multiple second sub-touch channels are short-circuited or driven synchronously, and multiple fourth sub-touch channels are short-circuited or driven synchronously. Alternatively, multiple second sub-touch channels and multiple fourth sub-touch channels can perform independent reception and signal processing, and the signal processing methods of multiple second sub-touch channels and multiple fourth sub-touch channels can be selected according to actual needs.

[0094] In an exemplary embodiment, the first touch channel 1 includes a plurality of first touch electrodes 100, and the second touch channel 2 includes a plurality of second touch electrodes 200; the first touch channel 1 and the second touch channel 2 can be disposed in the same layer or in different layers. For example, the touch layer 304 includes a first metal layer 3012 and a second metal layer 3011. The first metal layer 3012 includes the first touch channel 1 and the second touch channel 2 arranged intersecting each other. The second metal layer 3011 includes a plurality of bridging electrodes, which are used to connect the plurality of first touch electrodes 100 in the first touch channel 1, or the bridging electrodes are used to connect the plurality of second touch electrodes 200 in the second touch channel 2.

[0095] For example, the encapsulation layer 303 includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked together. The first inorganic encapsulation layer and the second inorganic encapsulation layer can be fabricated by vapor deposition (e.g., chemical vapor deposition, CVD), and the organic encapsulation layer can be fabricated by inkjet printing (IJP).

[0096] For example, the light-emitting layer 302 includes an anode layer, an organic light-emitting layer (EL), and a cathode layer disposed sequentially along a direction away from the substrate 300.

[0097] A pixel definition layer (PDL) is provided between the anode layer and the organic light-emitting layer. The pixel definition layer can be formed of organic materials such as polyimide (PI), polyamide, benzocyclobutene (BCB), acrylic resin or phenolic resin, or inorganic materials such as SiNx.

[0098] This disclosure provides a touch module, including the touch display panel described above.

[0099] The display device can be any product or component with display function, such as an LCD TV, LCD monitor, OLED monitor, digital photo frame, mobile phone, or tablet computer. The display device also includes a flexible circuit board, a printed circuit board, and a backplate.

[0100] The following points need to be explained:

[0101] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0102] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present disclosure, i.e., these drawings are not drawn to actual scale. It will be understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0103] (3) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0104] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A touch display panel, wherein, The device includes a substrate, a driving layer, a light-emitting layer, and an encapsulation layer stacked sequentially on the substrate. A touch layer is provided on the encapsulation layer, and a first touch channel extending along a first direction and a second touch channel extending along a second direction are provided on the touch layer. The first direction and the second direction are intersected. The touch layer includes a touch area and a non-touch area located around the touch area. The touch area includes a central region and a touch edge region located around the central region. The first touch channel includes a plurality of first sub-touch channels located in the central region and a plurality of second sub-touch channels located in the touch edge region, wherein the width of the first sub-touch channels is greater than the width of the second sub-touch channels; The second touch channel includes a plurality of third sub-touch channels located in the central region and a plurality of fourth sub-touch channels located in the touch edge region, wherein the width of the third sub-touch channels is greater than the width of the fourth sub-touch channels.

2. The touch display panel according to claim 1, wherein, The width of the second sub-touch channel is 1 / 2, 1 / 3, or 1 / 4 of that of the first sub-touch channel; The width of the fourth sub-touch channel is 1 / 2, 1 / 3, or 1 / 4 of that of the third sub-touch channel.

3. The touch display panel according to claim 1, wherein, The sum of the widths of all the second sub-channels is n times the width of the first sub-touch channel; The sum of the widths of all the fourth sub-channels is n times the width of the third sub-touch channel; Where n is a positive integer.

4. The touch display panel according to claim 1, wherein, The width of the first sub-touch channel is 4.5–6 mm, and the width of the second sub-touch channel is 1–3 mm; The width of the third sub-touch channel is 4.5–6 mm, and the width of the fourth sub-touch channel is 1–3 mm.

5. The touch display panel according to claim 3, wherein, The first touch channel includes a plurality of first touch electrodes, and the second touch channel includes a plurality of second touch electrodes; The central region includes multiple first touch repeating units, and the touch edge region includes multiple second touch repeating units. Each first touch repeating unit includes M1 first touch electrodes and N1 second touch electrodes, and each second touch repeating unit includes M2 first touch electrodes and N2 second touch electrodes. M1 is m times M2, N1 is m times N2, and M1, M2, N1, and N2 are all positive integers, and m is a positive integer greater than 1.

6. The touch display panel according to claim 5, wherein, The touch edge region includes a first sub-touch edge region located on opposite sides of the central region in the first direction, and a second sub-touch edge region located on opposite sides of the central region in the second direction. The overlapping area of ​​the adjacent first sub-touch edge region and the second sub-touch edge region includes a third touch repeating unit. The third touch repeating unit includes M3 first touch electrodes and N3 second touch electrodes, where M2 is m times M3, N2 is m times N3, M3 and N3 are both positive integers, and m is a positive integer greater than 1.

7. The touch display panel according to claim 1, wherein, In the first direction, a plurality of first touch signal lines are provided on at least one side of the non-touch area located in the touch area; in the second direction, a plurality of second touch signal lines are provided on at least one side of the non-touch area located in the touch area. Each of the first touch channels has at least one end connected to a corresponding first touch signal line in its extension direction, the first touch signal line including a first sub-touch signal line connected to the first sub-touch channel and a second sub-touch signal line connected to the second sub-touch channel; Each of the second touch channels has a second touch signal line connected to at least one end in its extension direction, the second touch signal line including a third sub-touch signal line connected to the third sub-touch channel and a fourth sub-touch signal line connected to the fourth sub-touch channel.

8. The touch display panel according to claim 7, wherein, The first touch channel is a sensing electrode channel, and the touch display panel further includes a multiplexing circuit, which includes a first switching circuit and a second switching circuit. The first switching circuit includes a plurality of first switching transistors, and the plurality of first switching transistors are configured in a one-to-one correspondence with a plurality of second sub-touch signal lines; The second switching circuit includes a plurality of second switching transistors, each of which is connected to at least two second sub-touch signal lines.

9. The touch display panel according to claim 8, wherein, It also includes a first selection control unit, used to select whether the first switching circuit or the second switching circuit is working based on the signal strength of the second sub-touch signal line.

10. The touch display panel according to claim 7, wherein, It also includes a signal processing unit for summing the signals from multiple second sub-touch channels.

11. The touch display panel according to claim 8, wherein, It also includes a second selection control unit, which is used to select to independently process the signals of the second sub-touch channel in active pen touch mode, and to select the second switch circuit to work in finger touch mode, or to select to sum the signals of multiple second sub-touch channels.

12. A touch module, wherein, Includes the touch display panel as described in any one of claims 1-10.

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