Touch display panel

Abstract

This invention discloses a touch display panel, including multiple touch driving lines parallel to the display area, multiple common signal lines parallel to the display area, multiple multiplexed electrodes arrayed in the display area, and multiple multiplexed circuits arrayed in the display area. Each multiplexed circuit includes a first input terminal, a second input terminal, and a first output terminal. The first input terminal is connected to the corresponding touch driving line, the second input terminal is connected to the corresponding common signal line, and the first output terminal is connected to the corresponding multiplexed electrode. By integrating the multiplexed circuits controlling touch and display and their connected signal lines within the display area, the fan-out height of the bottom bezel can be reduced, facilitating a narrow bezel design.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a touch display panel. Background Technology

[0002] Narrow bezel displays, with their advantages of simplicity, aesthetics, and high screen-to-body ratio, have become one of the development trends in high-end displays. Currently, the development of narrow bezel technology has reached a bottleneck, making it particularly difficult to further reduce the bezel size of the display panel and improve product specifications. The height of the fanout area within the bottom bezel of the display panel is a significant factor hindering the realization of narrow bezel displays. Summary of the Invention

[0003] This invention provides a touch display panel to solve the technical problem that the bottom bezel of existing touch display panels has an excessively high fan-out height, which prevents the width of the bottom bezel from being further reduced.

[0004] To solve the above problems, the technical solution provided by the present invention is as follows:

[0005] This invention provides a touch display panel, including a display area, wherein the touch display panel includes:

[0006] Multiple touch drive lines are distributed in parallel in the display area;

[0007] Multiple common signal lines are distributed in parallel within the display area;

[0008] Multiple multiplexed electrodes are arrayed in the display area; and

[0009] Multiple multiplexed circuits are arrayed in the display area. Each multiplexed circuit includes a first input terminal, a second input terminal, and a first output terminal. The first input terminal is connected to the corresponding touch driving line, the second input terminal is connected to the corresponding common signal line, and the first output terminal is connected to the corresponding multiplexed electrode.

[0010] In some embodiments of the present invention, the multiplexing circuits are arrayed along a first direction and a second direction, and the touch driving line extends along the second direction; wherein, with the second direction as the column direction, the first input terminal of each two adjacent columns of the multiplexing circuits is connected to the same touch driving line.

[0011] In some embodiments of the present invention, the touch display panel further includes:

[0012] Multiple first multiplexed signal lines are distributed in parallel in the display area;

[0013] Multiple secondary multiplexed signal lines are distributed in parallel in the display area;

[0014] Multiple third-multiplexed signal lines are distributed in parallel in the display area;

[0015] Multiple fourth-multiplexed signal lines are distributed in parallel in the display area;

[0016] The multiplexing circuit further includes a first control terminal and a second control terminal, wherein the first control terminal is connected to the corresponding first multiplexing signal line or the second multiplexing signal line, and the second control terminal is connected to the corresponding third multiplexing signal line or the fourth multiplexing signal line.

[0017] In some embodiments of the present invention, in two columns of multiplexed circuits connected to the same touch driving line, the first control terminal of one column of multiplexed circuits is connected to the first multiplexed signal line, and the first control terminal of the other column of multiplexed circuits is connected to the second multiplexed signal line; the second control terminal of one column of multiplexed circuits is connected to the third multiplexed signal line, and the second control terminal of the other column of multiplexed circuits is connected to the fourth multiplexed signal line.

[0018] In some embodiments of the present invention, the first multiplexed signal line, the second multiplexed signal line, the third multiplexed signal line, and the fourth multiplexed signal line extend along the first direction, and the touch driving line and the common signal line extend along the second direction.

[0019] In some embodiments of the present invention, in two columns of multiplexed circuits connected to the same touch driving line, a common signal line connected to one column of multiplexed circuits and another common signal line connected to the other column of multiplexed circuits are symmetrically distributed with respect to the touch driving line.

[0020] In some embodiments of the present invention, the touch display panel further includes multiple touch leads distributed parallel to the display area. The touch leads are electrically connected to the multiplexing circuit and the multiplexing electrode. The touch leads extend along the second direction. In the two columns of multiplexing circuits connected to the same touch driving line, one of the touch leads connected to one column of multiplexing circuits and another touch lead connected to the other column of multiplexing circuits are symmetrically distributed about the touch driving line.

[0021] In some embodiments of the present invention, the multiplexing circuit includes a first transistor and a second transistor electrically connected. The gate of the first transistor is electrically connected to the first multiplexed signal line or the second multiplexed signal line. The source of the first transistor is connected to the touch driving line. The drain of the first transistor is connected to the touch lead. The gate of the second transistor is connected to the third multiplexed signal line or the fourth multiplexed signal line. The source of the second transistor is connected to the common signal line. The drain of the second transistor is connected to the drain of the first transistor.

[0022] In some embodiments of the present invention, the touch display panel further includes a plurality of scan lines extending along the first direction and arranged along the second direction, and a plurality of data lines extending along the second direction and arranged along the first direction. The scan lines and the data lines intersect to define a plurality of sub-pixel regions, wherein the first transistor and the second transistor in any of the multiplexing circuits are disposed in the same or different sub-pixel regions.

[0023] In some embodiments of the present invention, the touch display panel further includes a plurality of arrayed pixel units, wherein the sub-pixels of the pixel units are located in the corresponding sub-pixel regions; two multiplexed circuits sharing the same touch driving line in the first direction constitute a multiplexed circuit group, and the region where a pixel electrode is located constitutes a repeating region, wherein a repeating region corresponds to a plurality of pixel units, and the plurality of multiplexed circuit groups are uniformly distributed in the repeating region along the first direction and the second direction.

[0024] In some embodiments of the present invention, the area where one of the multiplexing circuit groups is located corresponds to several pixel units distributed in an array.

[0025] In some embodiments of the present invention, the first multiplexed signal line, the second multiplexed signal line, the third multiplexed signal line, and the fourth multiplexed signal line are disposed on the same layer as the scan line, and the first multiplexed signal line, the second multiplexed signal line, the third multiplexed signal line, and the fourth multiplexed signal line are respectively adjacent to the corresponding scan line.

[0026] The beneficial effects of this invention are as follows: The touch display panel provided in this embodiment includes multiple touch driving lines parallel to the display area, multiple common signal lines parallel to the display area, multiple multiplexed electrodes arrayed in the display area, and multiple multiplexed circuits arrayed in the display area. Each multiplexed circuit includes a first input terminal, a second input terminal, and a first output terminal. The first input terminal is connected to the corresponding touch driving line, the second input terminal is connected to the corresponding common signal line, and the first output terminal is connected to the corresponding multiplexed electrode. By integrating the multiplexed circuits controlling touch and display and their connected signal lines within the display area, the fan-out height of the bottom bezel can be reduced, which is beneficial for achieving a narrow bezel design. Attached Figure Description

[0027] Figure 1 A schematic diagram of the distribution of the multiplexing circuit provided in an embodiment of the present invention;

[0028] Figure 2 The circuit schematic diagram of the multiplexing circuit provided in the embodiments of the present invention;

[0029] Figure 3 A schematic diagram of the distribution of sub-pixels provided in an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the distribution of another multiplexing circuit provided in an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the distribution of another multiplexing circuit provided in an embodiment of the present invention;

[0032] Figure 6 This is a film layer stacking diagram of a touch display panel provided in an embodiment of the present invention;

[0033] Figure 7 This is a timing diagram of the operation of a touch display panel within one frame, provided in an embodiment of the present invention. Detailed Implementation

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram showing the distribution of the multiplexing circuit integrated into the display area according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the multiplexing circuit provided in an embodiment of the present invention. The embodiment of the present invention provides a touch display panel 100, which includes a display area AA and a non-display area (not shown in the figure). The display area AA is used to display images, and the non-display area includes a fan-out area, a bonding area, etc., and is not used for display. The touch display panel 100 may be a liquid crystal display panel.

[0037] The touch display panel 100 includes multiple touch driving lines Rx, multiple common signal lines COM, and multiple multiplexed electrodes (such as...). Figure 2 The display area AA consists of TP1 to TP4 and multiple multiplexing circuits (MUX). Multiple touch drive lines Rx are distributed in parallel on the display area AA, multiple common signal lines COM are distributed in parallel on the display area AA, the multiplexing circuit MUX array is distributed on the display area AA, and the multiplexing electrode array is distributed on the display area. The touch drive lines Rx are used to transmit touch drive signals, the common signal lines COM are used to provide a common voltage signal, the multiplexing electrodes function as common electrodes during display and as touch electrodes during touch, and the multiplexing circuit MUX is used to output a common voltage signal or a touch drive signal to the multiplexing electrodes.

[0038] Specifically, such as Figure 2 As shown, the multiplexing circuit MUX includes a first input terminal I1, a second input terminal I2, a first output terminal O1, a first control terminal C1, and a second control terminal C2. The first input terminal I1 is connected to the corresponding touch driving line Rx to receive a touch driving signal. The second input terminal I2 is connected to the corresponding common signal line COM to receive a common voltage signal. The first output terminal O1 is connected to the corresponding multiplexing electrode TP to output a touch driving signal or a common voltage signal to the multiplexing electrode TP. The first control terminal C1 controls the opening or closing of the channel between the first input terminal I1 and the first output terminal O1, and the second control terminal C2 controls the opening or closing of the channel between the second input terminal I2 and the first output terminal O1.

[0039] Existing technologies place the touch circuit in the lower bezel area of ​​the non-display area, which occupies too much fan-out space. In this embodiment of the invention, the touch function control adopts the design of a multiplexed circuit MUX, which integrates the multiplexed circuit MUX in the display area AA of the touch display panel 100, without occupying additional lower bezel space, which is conducive to further optimization of the narrow bezel.

[0040] like Figure 1 As shown, Figure 1 Only two sets of multiplexed circuits (MUX) are shown for illustration. These MUXs can be arrayed along a first direction (X) and a second direction (Y), with the drive signal line Rx extending along the second direction. In this embodiment, two adjacent multiplexed circuits can share the same drive signal line Rx, thus saving on the number of vertical traces.

[0041] Specifically, please also refer to Figure 1 and Figure 2 With the first direction X as the row direction (horizontal direction) and the second direction Y as the column direction (vertical direction), the first input terminal I1 of each two adjacent column multiplexing circuits MUX can be connected to the same touch driving line Rx.

[0042] Furthermore, the touch driving line Rx is positioned between two adjacent multiplexed circuits MUX, so that the touch driving line Rx can connect to the multiplexed circuits MUX on both sides, saving wiring.

[0043] Please see Figure 1 The touch display panel further includes multiple first multiplexed signal lines MUX1, multiple parallel second multiplexed signal lines MUX2, multiple parallel third multiplexed signal lines MUX3, and multiple parallel fourth multiplexed signal lines MUX4. The first multiplexed signal lines MUX1, MUX2, MUX3, and MUX4 are all located within the display area AA.

[0044] like Figure 2As shown, the first control terminal C1 of the multiplexing circuit MUX is connected to the corresponding first multiplexing signal line MUX1 or second multiplexing signal line MUX2, and the second control terminal C2 is connected to the corresponding third multiplexing signal line MUX3 or fourth multiplexing signal line MUX4. By connecting the first control terminal C1 and the second control terminal C2 of different multiplexing circuits MUX to different multiplexing signal lines, the multiplexing electrodes at different positions can be controlled to be in touch or display state at the same time by turning the multiplexing circuit MUX on or off. This ensures that touch driving signals are delivered to some multiplexing electrodes and common voltage signals are delivered to other multiplexing electrodes at the same time, avoiding display abnormalities caused by floating signals.

[0045] Furthermore, in the two multiplexed circuits MUX connected to the same touch drive line Rx, the first control terminal C1 of one multiplexed circuit MUX is connected to the first multiplexed signal line MUX1, and the first control terminal C1 of the other multiplexed circuit MUX is connected to the second multiplexed signal line MUX2; the second control terminal C2 of one multiplexed circuit MUX is connected to the third multiplexed signal line MUX3, and the second control terminal C2 of the other multiplexed circuit MUX is connected to the fourth multiplexed signal line MUX4.

[0046] For example, in multiplexing circuits MUX-1 and MUX-2 that connect to the same touch drive line Rx1, the first control terminal C1 of multiplexing circuit MUX-1 is connected to the first multiplexed signal line MUX1, the first control terminal C1 of multiplexing circuit MUX-2 is connected to the second multiplexed signal line MUX2, the second control terminal C2 of multiplexing circuit MUX-1 is connected to the third multiplexed signal line MUX3, and the second control terminal C2 of multiplexing circuit MUX-2 is connected to the fourth multiplexed signal line MUX4. (See also...) Figure 2 and Figure 7 , Figure 7The timing diagram of the touch display panel provided in this embodiment of the invention within one frame shows that when the first multiplexed signal line MUX1 is at a high level, the switch controlled by the first control terminal C1 of the multiplexing circuit MUX-1 is turned on, outputting touch driving signals to the multiplexed electrodes TP1 and TP3. At the same time, the fourth multiplexed signal line MUX4 is at a high level, and the switch controlled by the second control terminal C2 of the multiplexing circuit MUX-2 is turned on, outputting a common voltage signal to the multiplexed electrodes TP2 and TP4. At this time, the second multiplexed signal line MUX2 and the third multiplexed signal line MUX3 are at a low level, and the switches controlled by the second control terminal C2 of the multiplexing circuit MUX-1 and the first control terminal C1 of the multiplexing circuit MUX-2 are both in the closed state. This allows the multiple multiplexed electrodes in this embodiment of the invention to perform touch control while also functioning as a common electrode. In this embodiment of the invention, the common signal line COM and the touch drive lines Rx1 to Rxn are always in a constant voltage state (e.g., -0.1V), and can be set to -0.1V; each multiplexed signal line MUX1 to MUX4 can be -8V when it is low level and 10V when it is high level.

[0047] The multiplexed electrodes TP1 to TP4 in this embodiment are merely illustrative examples. Those skilled in the art will understand that a touch display panel should include multiple multiplexed electrodes. As described above, the multiplexed electrodes TP1 and TP3 have the same operating timing, as do TP2 and TP4. TP1 and TP3 can be two multiplexed electrodes spaced apart in the same row, two multiplexed electrodes spaced apart in the same column, two adjacent multiplexed electrodes, or two adjacent multiplexed electrodes in the same column. There is no limitation on which multiplexed electrodes are selected for touch function and which are selected for display function within the same timing sequence. Preferably, multiplexed electrodes spaced apart in each row or column are used as touch electrodes, and the remaining multiplexed electrodes are used as display electrodes.

[0048] Please see Figure 1 The touch display panel 100 of this embodiment further includes multiple touch leads TL parallel to the display area AA. These touch leads are electrically connected to the multiplexing circuit and the multiplexing electrode, and extend along the second direction Y. To reduce the cross-line area between the multiplexing circuit MUX and each trace, the arrangement of other signal lines involved in the two columns of the multiplexing circuit MUX connected to the same touch driving line Rx can be mirrored, that is, the other signal lines involved in the two columns of the multiplexing circuit MUX are arranged symmetrically about the touch driving line Rx.

[0049] Specifically, in the two columns of multiplexed circuits MUX connected to the same touch driving line Rx, one touch lead TL connected to one column of multiplexed circuits MUX and another touch lead TL connected to the other column of multiplexed circuits MUX are symmetrically distributed with respect to the touch driving line Rx; one common signal line COM connected to one column of multiplexed circuits MUX and another common signal line COM connected to the other column of multiplexed circuits MUX are symmetrically distributed with respect to the touch driving line Rx, thus minimizing the cross-line area.

[0050] Furthermore, in the common signal line COM and touch lead TL connected by the same multiplexed circuit MUX, the touch lead TL will be closer to the touch driver line Rx than the common signal line COM. That is, by using a mirrored wiring method such as COM, TL, Rx, TL, COM, we can save vertical traces and reduce cross-line traces to the greatest extent.

[0051] like Figure 1 and Figure 2 As shown, the multiplexing circuit MUX includes a first transistor T1 and a second transistor T2 electrically connected. The gate of the first transistor T1 is electrically connected to either the first multiplexed signal line MUX1 or the second multiplexed signal line MUX2. The source of the first transistor T1 is connected to the touch driving line Rx1, and the drain of the first transistor T1 is connected to the touch lead TL. The gate of the second transistor is connected to either the third multiplexed signal line MUX3 or the fourth multiplexed signal line MUX4, and the source of the second transistor is connected to the common signal line COM. The drain of the second transistor T2 is connected to the drain of the first transistor T1. That is, the gate of the first transistor T1 corresponds to the first control terminal C1, and the source of the first transistor T1 corresponds to the first input terminal I1. The gate of the second transistor T2 corresponds to the second control terminal C2, and the source of the second transistor corresponds to the second input terminal I2. The drains of the first transistor T1 and the second transistor T2 correspond to the first output terminal O1.

[0052] The transistors mentioned in the embodiments of the present invention are thin-film transistors, specifically at least one of amorphous silicon thin-film transistors, metal oxide transistors, and low-temperature polycrystalline silicon transistors, but are not limited thereto.

[0053] Please see Figure 1In an embodiment of the present invention, the first multiplexed signal line MUX1, the second multiplexed signal line MUX2, the third multiplexed signal line MUX3, and the fourth multiplexed signal line MUX4 extend along the first direction X, i.e., are arranged horizontally. The arrangement order of the first multiplexed signal line MUX1, the second multiplexed signal line MUX2, the third multiplexed signal line MUX3, and the fourth multiplexed signal line MUX4 is adjusted according to the arrangement position of the transistors in the multiplexing circuit MUX to reduce cross-line crossings. In a specific embodiment, the first multiplexed signal line MUX1, the second multiplexed signal line MUX2, the fourth multiplexed signal line MUX4, and the third multiplexed signal line MUX3 are arranged sequentially along the second direction Y. The first multiplexed signal line MUX1, the second multiplexed signal line MUX2, the fourth multiplexed signal line MUX4, and the third multiplexed signal line MUX3, together with the common signal line COM, touch lead TL, touch drive line Rx, touch lead TL, and common signal line COM extending along the second direction and arranged sequentially, interweave to form 4×4 unit areas. The first transistor T1 of the multiplexed circuit MUX on one side of the touch drive line Rx is located at 1-2 (first row, second column), and the second transistor T2 is located at 4-1 (fourth row, first column). The first transistor T1 of the multiplexed circuit MUX on the other side of the touch drive line Rx is located at 2-3 (second row, third column), and the second transistor T2 is located at 4-1 (third row, fourth column). In other embodiments, the design of the multiplexing circuit MUX can be based on the size and number of multiplexing electrodes, and there is no restriction on the arrangement of the transistors in the multiplexing circuit MUX.

[0054] Please see Figure 3 The touch display panel 100 of this embodiment includes multiple scan lines (Scan) and multiple data lines (Data). The scan lines (Scan) and data lines (Data) intersect to define multiple sub-pixel regions 101. The touch display panel includes multiple arrayed pixel units, each pixel unit including several sub-pixels, and each sub-pixel is located within its corresponding sub-pixel region 101. Each sub-pixel region 101 corresponds to one sub-pixel, such as a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. Adjacent red sub-pixels R, green sub-pixels G, and blue sub-pixels B form a pixel unit PX. The first transistor T1 and the second transistor T2 in any multiplexing circuit MUX can be disposed in the same or different sub-pixel regions 101. In a specific embodiment of this invention, the first transistor T1 and the second transistor T2 are located in different sub-pixel regions 101, such as... Figure 4 As shown.

[0055] Specifically, the scan lines Scan extend along the first direction X and are arranged along the second direction Y, and the data lines Data extend along the second direction Y and are arranged along the first direction X. In order to avoid occupying the opening area of ​​the sub-pixels as much as possible, in the thickness projection direction of the display panel, the multiplexed signal lines MUX1 to MUX4 extending along the first direction X of this embodiment are as close as possible to the corresponding scan lines Scan, and the common signal lines COM, touch leads TL, and touch driving lines Rx extending along the second direction Y are as close as possible to the corresponding data lines Data.

[0056] like Figure 4 As shown, in an embodiment of the present invention, the first multiplexed signal line MUX1, the second multiplexed signal line MUX2, the third multiplexed signal line MUX3, and the fourth multiplexed signal line MUX4 are disposed on the same layer as the scan line Scan. The first multiplexed signal line MUX1, the second multiplexed signal line MUX2, the third multiplexed signal line MUX3, and the fourth multiplexed signal line MUX4 are respectively adjacent to the corresponding scan line Scan. In other words, the first multiplexed signal line MUX1, the second multiplexed signal line MUX2, the third multiplexed signal line MUX3, and the fourth multiplexed signal line MUX4 are adjacent to the display transistors connected to their corresponding scan lines, so as to minimize the impact on the pixel aperture ratio. In other embodiments, when the multiplexed signal lines and scan lines are arranged in different layers, in the thickness projection direction of the touch display panel, the first multiplexed signal line MUX1, the second multiplexed signal line MUX2, the third multiplexed signal line MUX3, and the fourth multiplexed signal line MUX4 respectively overlap with the corresponding scan line Scan at least partially. Preferably, in the thickness projection direction of the touch display panel, the first multiplexed signal line MUX1, the second multiplexed signal line MUX2, the third multiplexed signal line MUX3, and the fourth multiplexed signal line MUX4 respectively coincide with the corresponding scan line Scan.

[0057] In an embodiment of the present invention, the common signal line COM, the touch lead TL, and the touch driving line Rx are disposed on different layers from the data line Data. In the thickness projection direction of the touch display panel 100, the common signal line COM, the touch lead TL, and the touch driving line Rx overlap with the corresponding data line Data at least partially. Preferably, in the thickness projection direction of the touch display panel 100, the common signal line COM, the touch lead TL, and the touch driving line coincide with the corresponding data line to minimize the impact on the pixel aperture ratio.

[0058] Two multiplexed circuits MUX sharing the same touch driving line Rx in the first direction X constitute a multiplexed circuit group. The area where a pixel electrode TP is located is a repeating area. One repeating area corresponds to multiple sub-pixel areas. Multiple multiplexed circuit groups are evenly distributed in the repeating area along the first direction X and the second direction Y. That is, multiple multiplexed circuit groups are evenly distributed in multiple sub-pixel areas in the first direction and the second direction.

[0059] Within the region corresponding to a pixel electrode TP, the number of multiplexed circuit groups is less than the number of sub-pixel regions. One region containing a multiplexed circuit group corresponds to several pixel units arranged in an array.

[0060] Specifically, such as Figure 4 As shown, in an embodiment of the present invention, the number of pixel units PX occupied by the multiplexed circuit group formed by two adjacent multiplexed circuits MUX along the first direction X is 4×4, that is, the number of sub-pixel regions 101 occupied is 12×4. The signal lines (such as touch lead TL, common signal line COM, touch drive line Rx, multiplexed signal line, etc.) connected to the two multiplexed circuits coincide with the corresponding scan line Data or data line Data as much as possible.

[0061] For example, such as Figure 5 As shown, Figure 5 In this invention, one smallest unit of grid corresponds to one pixel unit PX. In this embodiment, one multiplexed electrode TP can correspond to a 40×40 row / column pixel unit PX, and one 4×4 row / column pixel unit PX (… Figure 5 The bolded 4×4 rows and columns correspond to one multiplexed circuit group MUX'. For example, one 4×4 row and column pixel unit PX corresponds to multiplexed circuits MUX-1 and MUX-2. Two multiplexed circuits MUX sharing a touch drive line Rx in the first direction X constitute one multiplexed circuit group MUX'. For example, multiplexed circuits MUX-1 and MUX-2 constitute one multiplexed circuit group MUX'. Within multiple sub-pixel regions corresponding to the size of a multiplexed electrode TP, the multiplexed circuit groups MUX' are evenly distributed in the first direction X and the second direction Y, respectively. For example, along the first direction, every three multiplexed circuit groups MUX' are arranged consecutively, with a spacing of one column of sub-pixel region size between every three multiplexed circuit groups MUX'; along the second direction, each multiplexed circuit group MUX' is arranged with a spacing of ten rows of sub-pixel region size between each multiplexed circuit group MUX'.

[0062] Please see Figure 6The touch display panel 100 of this embodiment includes a substrate 10, a display transistor 20 disposed on the substrate 10, a pixel electrode 30 disposed on the display transistor 20, a liquid crystal layer on the pixel electrode, and a color filter substrate (not shown in the figure) on the liquid crystal layer. The pixel electrode 30 is electrically connected to the display transistor 20. The display transistor 20 includes an active layer 21, a gate 22, a source 23, and a drain 24. The multiplexed electrode TP can be disposed between the pixel electrode 30 and the source 23 / drain 24. The touch lead TL can be disposed on the same layer as the source 23 / drain 24. The common signal line COM and the touch driving signal line Rx can be disposed on the same layer as the multiplexed electrode TP.

[0063] The same-layer configuration mentioned in this embodiment of the invention refers to a structure formed using the same material and the same patterning process. The material of the reused electrode TP includes, but is not limited to, indium tin oxide. The display transistor 20 may be a polysilicon transistor.

[0064] In summary, this invention provides a touch display panel, including multiple touch driving lines parallel to the display area, multiple common signal lines parallel to the display area, multiple multiplexed electrodes arrayed in the display area, and multiple multiplexed circuits arrayed in the display area. Each multiplexed circuit includes a first input terminal, a second input terminal, and a first output terminal. The first input terminal is connected to the corresponding touch driving line, the second input terminal is connected to the corresponding common signal line, and the first output terminal is connected to the corresponding multiplexed electrode. By integrating the multiplexed circuits controlling touch and display, along with their connected signal lines, into the display area, the fan-out height of the bottom bezel can be reduced, facilitating a narrow bezel design.

[0065] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0066] The above provides a detailed description of a touch display panel provided in the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of the present invention. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A touch display panel, characterized in that, The touch display panel includes a display area and comprises: Multiple touch drive lines are distributed in parallel in the display area; Multiple common signal lines are distributed in parallel within the display area; Multiple multiplexed electrodes are arrayed in the display area; and Multiple multiplexed circuits are arrayed in the display area. Each multiplexed circuit includes a first input terminal, a second input terminal, and a first output terminal. The first input terminal is connected to the corresponding touch driving line, the second input terminal is connected to the corresponding common signal line, and the first output terminal is connected to the corresponding multiplexed electrode. The multiplexed circuits are arrayed along a first direction and a second direction, and the touch driving line extends along the second direction. With the second direction as the column direction, the first input terminals of every two adjacent columns of multiplexed circuits are connected to the same touch driving line.

2. The touch display panel according to claim 1, characterized in that, The touch display panel also includes: Multiple first multiplexed signal lines are distributed in parallel in the display area; Multiple secondary multiplexed signal lines are distributed in parallel in the display area; Multiple third-multiplexed signal lines are distributed in parallel in the display area; Multiple fourth-multiplexed signal lines are distributed in parallel in the display area; The multiplexing circuit further includes a first control terminal and a second control terminal, wherein the first control terminal is connected to the corresponding first multiplexing signal line or the second multiplexing signal line, and the second control terminal is connected to the corresponding third multiplexing signal line or the fourth multiplexing signal line.

3. The touch display panel according to claim 2, characterized in that, In the two multiplexed circuits connected to the same touch drive line, the first control terminal of one multiplexed circuit is connected to the first multiplexed signal line, and the first control terminal of the other multiplexed circuit is connected to the second multiplexed signal line; the second control terminal of one multiplexed circuit is connected to the third multiplexed signal line, and the second control terminal of the other multiplexed circuit is connected to the fourth multiplexed signal line.

4. The touch display panel according to claim 3, characterized in that, The first multiplexed signal line, the second multiplexed signal line, the third multiplexed signal line, and the fourth multiplexed signal line extend along the first direction, while the touch driving line and the common signal line extend along the second direction.

5. The touch display panel according to claim 4, characterized in that, In the two multiplexed circuits connected to the same touch driving line, a common signal line connected to one multiplexed circuit and another common signal line connected to the other multiplexed circuit are symmetrically distributed about the touch driving line.

6. The touch display panel according to claim 4, characterized in that, The touch display panel further includes multiple touch leads distributed parallel to the display area. These touch leads are electrically connected to the multiplexing circuit and the multiplexing electrodes. The touch leads extend along the second direction. In the two multiplexed circuits connected to the same touch driving line, one of the multiplexed circuits connects a touch lead and the other multiplexed circuit connects another touch lead about the touch driving line.

7. The touch display panel according to claim 6, characterized in that, The multiplexing circuit includes a first transistor and a second transistor that are electrically connected. The gate of the first transistor is electrically connected to the first multiplexed signal line or the second multiplexed signal line. The source of the first transistor is connected to the touch driving line. The drain of the first transistor is connected to the touch lead. The gate of the second transistor is connected to the third multiplexed signal line or the fourth multiplexed signal line. The source of the second transistor is connected to the common signal line. The drain of the second transistor is connected to the drain of the first transistor.

8. The touch display panel according to claim 7, characterized in that, The touch display panel further includes multiple scan lines extending along the first direction and arranged along the second direction, and multiple data lines extending along the second direction and arranged along the first direction. The scan lines and the data lines intersect to define multiple sub-pixel regions, wherein the first transistor and the second transistor in any of the multiplexing circuits are disposed in the same or different sub-pixel regions.

9. The touch display panel according to claim 8, characterized in that, The touch display panel further includes multiple arrayed pixel units, and the sub-pixels of the pixel units are located in the corresponding sub-pixel regions; two multiplexed circuits that share the same touch driving line in the first direction are a multiplexed circuit group, and the area where a multiplexed electrode is located is a repeating region. A repeating region corresponds to multiple pixel units, and multiple multiplexed circuit groups are evenly distributed in the repeating region along the first direction and the second direction.

10. The touch display panel according to claim 9, characterized in that, The area where the multiplexed circuit group is located corresponds to several pixel units distributed in an array.

11. The touch display panel according to claim 8, characterized in that, The first multiplexed signal line, the second multiplexed signal line, the third multiplexed signal line, and the fourth multiplexed signal line are disposed on the same layer as the scan line, and the first multiplexed signal line, the second multiplexed signal line, the third multiplexed signal line, and the fourth multiplexed signal line are respectively adjacent to the corresponding scan line.

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