Touch display panel and touch display device

Abstract

The invention discloses a touch display panel and a touch display device. The touch display panel comprises a plurality of touch electrodes arranged in an array; m adjacent touch electrodes form a touch electrode group; the array substrate further comprises a first control circuit, a second control circuit, a plurality of gating control lines, a plurality of common signal lines, a plurality of switch control lines and a plurality of touch fan-out lines. The first control circuit comprises a plurality of multi-path selection circuits; the second control circuit comprises a plurality of control switches; the control end of the control switch is electrically connected with the switch control line, the input end of the control switch is electrically connected with the common signal line, and the output end of the control switch is correspondingly and electrically connected with the touch electrodes; wherein the control switches electrically connected with the adjacent touch electrodes belonging to different touch electrode groups are electrically connected with different common signal lines and different switch control lines respectively. According to the scheme, the short circuit condition of the touch fan-out line can be detected, and the touch detection reliability is improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular to a touch display panel and a touch display device. Background Art

[0002] Currently, display panels with touch functions are widely used in display devices such as mobile phones and wearable devices, so that display devices can realize human-computer interaction functions in a simple and convenient way. Display panels with touch functions are usually provided with multiple touch electrodes, and corresponding touch operations are realized by detecting the signal changes on each touch electrode.

[0003] In the prior art, during the visual testing (VT) test phase, a touch test is generally performed by checking the checkerboard to confirm whether the touch signal is transmitted normally. However, based on the structure of the touch display panel in the prior art, it is impossible to detect whether the touch fan-out line is short-circuited, resulting in reduced reliability of touch detection. Summary of the invention

[0004] In view of this, the present invention provides a touch display panel and a touch display device, which can detect the short circuit of the touch fan-out line and improve the reliability of touch detection.

[0005] In a first aspect, the present invention provides a touch display panel, comprising: a display area and a non-display area surrounding the display area;

[0006] The display area includes a plurality of touch electrodes arranged in an array; M adjacent touch electrodes constitute a touch electrode group; M is a positive integer greater than or equal to 2;

[0007] The non-display area includes a first control circuit, a second control circuit, a plurality of gate control lines, a plurality of common signal lines, a plurality of switch control lines, and a plurality of touch fan-out lines;

[0008] The first control circuit includes a plurality of multi-way selection circuits; the multi-way selection circuit includes a plurality of selection switches; in the same multi-way selection circuit, the control end of each selection switch is electrically connected to a different selection control line, the first end of each selection switch is electrically connected to the same touch fan-out line, and the second end of each selection switch is electrically connected to the corresponding touch electrodes in the same touch electrode group;

[0009] The second control circuit includes multiple control switches; the control end of the control switch is electrically connected to the switch control line, the input end of the control switch is electrically connected to the common signal line, and the output end of the control switch is electrically connected to the touch electrodes accordingly; wherein the control switches electrically connected to the touch electrodes that are adjacent and belong to different touch electrode groups are respectively electrically connected to different common signal lines and different switch control lines.

[0010] In a second aspect, the present invention provides a touch display device, comprising the touch display panel according to the first aspect of the present invention.

[0011] The technical solution of the present invention provides different common signals to touch electrodes that are adjacent and belong to different touch electrode groups by connecting control switches that are electrically connected to touch electrodes that are adjacent and belong to different touch electrode groups to different common signal lines and different switch control lines, so that the display area can present a chessboard with touch electrode groups as units, thereby determining the short circuit of the touch fan-out line according to the displayed chessboard situation. The detection capability of the short circuit of the touch fan-out line is improved, and the reliability of touch detection is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic cross-sectional structure diagram of a touch display panel provided by an embodiment of the present invention;

[0013] Figure 2 A schematic diagram of the structure of a touch display panel in a related technology provided by an embodiment of the present invention;

[0014] Figure 3 A schematic diagram of the structure of a touch display panel provided by an embodiment of the present invention;

[0015] Figure 4 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0016] Figure 5 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0017] Figure 6 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0018] Figure 7 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0019] Figure 8 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0020] Fig. 9A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0021] Fig.10 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0022] Fig.11 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0023] Fig.12 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0024] Fig.13 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0025] Fig.14 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0026] Fig.15 for Fig. 9 A schematic diagram of a cross-sectional structure along the A-A' direction;

[0027] Fig.16 for Fig. 9 Another schematic diagram of the cross-sectional structure along the A-A' direction;

[0028] Fig.17 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0029] Fig.18 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0030] Fig.19 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention;

[0031] Fig. 20 A schematic structural diagram of a touch display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] It should be noted that the terms “having”, “including”, “comprising”, etc. described in the present application are all open-ended meanings, that is, when describing a module as “having”, “including” or “comprising” a first element, a second element and / or a third element, it means that the module includes other elements in addition to the first element, the second element and / or the third element. In addition, ordinal numbers such as “first”, “second” and “third” in the present application are not intended to limit a specific order, but are only intended to distinguish between the various parts. In the present application, when describing that layer A and layer B are “set in the same layer”, it means that layer A and layer B are made of the same material and process.

[0034] Incell technology is a technology that embeds the touch panel function into the display panel, thereby achieving thinness and lightness of the panel. In a touch display panel based on the Incell architecture, the common electrode (or cathode) of the pixel in the touch display panel is reused as a touch electrode. The touch display panel in the embodiment of the present invention may be a liquid crystal display panel or an organic light emitting diode display panel, which is not limited in the embodiment of the present invention. The following embodiment is described by taking the liquid crystal display panel as an example. Figure 1 A schematic cross-sectional structure diagram of a touch display panel provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the liquid crystal touch display panel may include a driving substrate 1, a liquid crystal layer 2, and a color filter substrate 3, etc., which are stacked. The driving substrate 1 includes a pixel circuit 4, a pixel electrode 5, and a common electrode 6, etc., and the color filter substrate 3 includes a color resistance structure 7 of the pixel, and a black matrix 8 located at least between two adjacent color resistance structures 7, etc. The driving circuit 4 can be electrically connected to the pixel electrode 5 to provide the pixel electrode 5 with a data signal required for display, and the common electrode 6 can receive a common signal; the liquid crystal layer 2 includes liquid crystal molecules, and the electric field generated between the common electrode 6 and the pixel electrode 5 can drive the liquid crystal molecules to twist, so as to control the transmittance of the backlight source provided by the backlight module, so that the pixel can display the corresponding color and brightness.

[0035] Understandably, Figure 1 It is exemplarily shown that the pixel electrode 5 and the common electrode 6 are located on the same side of the liquid crystal layer 2, but it is not limited to this. When the pixel electrode 5 and the common electrode 6 are arranged on the same side of the liquid crystal layer 2, the touch display panel is a planar control mode display panel, such as a Fringe Field Switching (FFS) display panel or an In-Plane Switching (IPS) display panel. In other embodiments of the present invention, the pixel electrode 5 and the common electrode 6 may also be respectively arranged on both sides of the liquid crystal layer 2 to form a vertical control mode display panel, such as a twisted nematic (TN) display panel or a multi-quadrant vertical alignment (VA) display panel. In addition, Figure 1In the touch display panel shown, the pixel electrode 5 is located between the common electrode 6 and the liquid crystal layer 2, that is, the pixel electrode 5 is closer to the liquid crystal layer 2, but it is not limited thereto. In other embodiments, the pixel electrode 5 may be located on the side of the common electrode 6 away from the liquid crystal layer 2, that is, the common electrode 6 is closer to the liquid crystal layer 2, but it is not limited thereto in the embodiment of the present invention. Figure 1 The structure of the touch display panel shown is used to exemplarily illustrate the technical solution of the embodiment of the present invention.

[0036] Continue to refer Figure 1 For a touch liquid crystal display panel with integrated touch function, the common electrode 6 can be reused as a touch electrode. The driving process of the touch display panel may include a display stage and a touch stage. In the display stage, a display common signal is provided to the common electrode 6 to form an electric field between the common electrode 6 and the pixel electrode 5, driving the liquid crystal molecules to rotate and realizing the picture display; in the touch stage, a touch driving signal and / or a touch sensing signal is provided to the common electrode 6 to detect the touch position of a touch object such as a finger or a stylus.

[0037] The touch electrodes can be electrically connected to the touch driver chip through the touch fan-out lines in the non-display area. In order to optimize the layout of the touch fan-out lines, a multi-way selection circuit architecture is proposed. In the multi-way selection circuit architecture, different touch electrodes are electrically connected to the same touch fan-out line through a gate switch. For example, Figure 2A schematic structural diagram of a touch display panel in a related technology provided in an embodiment of the present invention. In the related technology, the touch electrode SE1' and the touch electrode SE2' are electrically connected to the touch fan-out line TX1' through the corresponding selection switch 2011', the touch electrode SE3' and the touch electrode SE4' are electrically connected to the touch fan-out line TX2' through the corresponding selection switch 2011', the selection switch 2011' connected to the touch electrode SE1' and the selection switch 2011' connected to the touch electrode SE3' are electrically connected to the same selection control line 40' (first selection control line 401'), and the selection switch 2011' connected to the touch electrode SE2' and the selection switch 2011' connected to the touch electrode SE4' are electrically connected to the same selection control line 40' (second selection control line 402'). In this way, by making the first selection control line 401' and the second selection control line 402' transmit different selection control signals respectively, the selection switch 2011' electrically connected to the touch electrode SE1' and the touch electrode SE2' can be controlled to be turned on or off, so that the touch electrode SE1' and the touch electrode SE2' can receive the touch drive signal transmitted by the touch fan-out line TX1' in a time-sharing manner, and provide the touch sensing signal to the touch fan-out line TX1' in a time-sharing manner; similarly, the touch electrode SE3' and the touch electrode SE4' can receive the touch drive signal transmitted by the touch fan-out line TX2' in a time-sharing manner, and provide the touch sensing signal to the touch fan-out line TX2' in a time-sharing manner.

[0038] In addition, in order to realize the touch detection of the touch display panel in the visual testing (VT) test stage, a control switch 301', a common signal line 50' and a switch control line 60' electrically connected to the touch electrode are also provided. Figure 2As shown, in the related art, the control switches 301' respectively connected to the touch electrodes (SE1', SE2', SE3' and SE4') are all electrically connected to the same switch control line 60', and the input end of the control switch 301' connected to the touch electrode SE1' and the touch electrode SE3' is connected to the first common signal line 501', and the input end of the control switch 301' connected to the touch electrode SE2' and the touch electrode SE4' is connected to the second common signal line 502'. In the touch detection stage of the VT test stage, a low-level signal (for example, 0V voltage) can be provided to each pixel electrode, and an enable level of the switch control signal can be provided to the control switch control line 60' to control each control switch 301' to be in an on state, and at the same time, a high-level common signal (for example, 5V voltage) is provided to the first common signal line 501', and a low-level common signal (for example, 0V voltage) is provided to the second common signal line 502', so that the liquid crystal molecules of the pixels corresponding to the touch electrode SE1' and the touch electrode SE3' can have the greatest degree of twisting under the action of the electric field between the touch electrode SE1' and the touch electrode SE3' and the pixel electrode, and the overall display luminous color of this part of the pixels can be white; while the liquid crystal molecules of the pixels corresponding to the touch electrode SE2' and the touch electrode SE4' cannot be twisted, and the backlight cannot penetrate this part of the pixels, so that the display luminous color of this part of the pixels is black. In this way, by providing different common signals to different touch electrodes respectively, the display screen of the touch display panel can present a checkerboard image. At this time, by observing whether the display screen presented by the touch display panel is a checkerboard image, whether the touch electrode can accurately receive the touch signal can be detected.

[0039] However, the inventors have found that when the above solution is adopted, the short circuit of two adjacent touch fan-out lines cannot be detected. For example, when the first selection control line 401' and the second selection control line 402' both provide the non-enable level of the selection control signal, the selection switch 2011' is disconnected, the touch electrode SE1' and the touch electrode SE3' both receive a 5V voltage, and the touch electrode SE2' and the touch electrode SE4' both receive a 0V voltage; the display luminous color of the pixel corresponding to the touch electrode SE1' and the touch electrode SE3' is white, and the display luminous color of the pixel corresponding to the touch electrode SE2' and the touch electrode SE4' is black, and the short circuit of the touch fan-out line TX1' and the touch fan-out line TX2' has no effect on the display screen, and it is impossible to determine whether the touch fan-out line is short-circuited based on the current display screen. When the first enable control line 401' and the second enable control line 402' both provide an enable level of the enable control signal, if the touch fan-out line TX1' and the touch fan-out line TX2' are not short-circuited, the touch electrode SE1' and the touch electrode SE2' form a loop, the touch electrode SE3' and the touch electrode SE4' form a loop, and each touch electrode receives a 0V voltage and a 5V voltage at the same time, so that the display colors of the pixels corresponding to all touch electrodes are gray; if the touch fan-out line TX1' and the touch fan-out line TX2' are short-circuited, a loop is formed between any two touch electrodes, but because the display luminous colors at the positions of each touch electrode are gray, it is impossible to determine whether the touch fan-out line is short-circuited by observing the current display screen. When one of the first enable control line 401' and the second enable control line 402' provides an enable level of the enable control signal and the other provides a non-enable level of the enable control signal, regardless of whether the touch fan-out line TX1' and the touch fan-out line TX2' are short-circuited or not, the touch electrode SE1' and the touch electrode SE3' both receive a 5V voltage, the touch electrode SE2' and the touch electrode SE4' both receive a 0V voltage, the display colors of the pixels corresponding to the touch electrode SE1' and the touch electrode SE3' are both white, and the display colors of the pixels corresponding to the touch electrode SE2' and the touch electrode SE4' are both black. Similarly, it is impossible to determine whether the touch fan-out line is short-circuited based on the current display screen.

[0040] In summary, the touch display panel in the related art cannot detect whether adjacent touch fan-out lines are short-circuited during the VT test phase, no matter what signal transmission method is used. Based on the problems in the related art, an embodiment of the present invention provides a touch display panel, which includes: a display area and a non-display area surrounding the display area; the display area includes a plurality of touch electrodes arranged in an array; M adjacent touch electrodes constitute a touch electrode group; M is a positive integer greater than or equal to 2; the non-display area includes a first control circuit, a second control circuit, a plurality of selection control lines, a plurality of common signal lines, a plurality of switch control lines, and a plurality of touch fan-out lines; the first control circuit includes a plurality of multi-way selection circuits; the multi-way selection circuit includes a plurality of selection switches; in the same multi-way selection circuit, each The control end of the selection switch is electrically connected to different selection control lines, the first end of each selection switch is electrically connected to the same touch fan-out line, and the second end of each selection switch is electrically connected to the corresponding touch electrodes in the same touch electrode group; the second control circuit includes multiple control switches; the control end of the control switch is electrically connected to the switch control line, the input end of the control switch is electrically connected to the common signal line, and the output end of the control switch is electrically connected to the corresponding touch electrode; wherein, the control switches electrically connected to the touch electrodes that are adjacent and belong to different touch electrode groups are electrically connected to different common signal lines and different switch control lines, respectively.

[0041] With the above solution, different common signals can be provided to adjacent touch electrodes belonging to different touch electrode groups during the touch short circuit detection stage, so that the display area can present a checkerboard with the touch electrode group as the unit, thereby determining the short circuit of the touch fan-out line according to the displayed checkerboard situation. This improves the detection capability of the touch fan-out line short circuit and the reliability of touch detection.

[0042] The above is the core idea of ​​the present invention. The technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Figure 3 A schematic diagram of a touch display panel provided by an embodiment of the present invention, referring to Figure 3In an embodiment of the present invention, the touch display panel includes: a display area AA and a non-display area NA surrounding the display area AA; the display area AA includes a plurality of touch electrodes SE arranged in an array; M adjacent touch electrodes SE constitute a touch electrode group 10; M is a positive integer greater than or equal to 2; the non-display area NA includes a first control circuit 20, a second control circuit 30, a plurality of gate control lines 40, a plurality of common signal lines 50, a plurality of switch control lines 60, and a plurality of touch fan-out lines TX; the first control circuit 20 includes a plurality of multi-way selection circuits 201; the multi-way selection circuit 201 includes a plurality of gate switches 2011; in the same multi-way selection circuit 201, the control terminals of the gate switches 2011 are respectively The first end of each selection switch 2011 is electrically connected to different selection control lines 40, and the first end of each selection switch 2011 is electrically connected to the same touch fan-out line TX, and the second end of each selection switch 2011 is electrically connected to each touch electrode SE in the same touch electrode group 10; the second control circuit 30 includes multiple control switches 301; the control end of the control switch 301 is electrically connected to the switch control line 60, the input end of the control switch 301 is electrically connected to the common signal line 50, and the output end of the control switch 301 is electrically connected to the touch electrode SE; wherein, the control switches 301 electrically connected to the touch electrodes SE that are adjacent and belong to different touch electrode groups 10 are electrically connected to different common signal lines 50 and different switch control lines 60, respectively.

[0044] It can be understood that the display area AA is used to realize the image display and touch functions of the display panel, such as Figure 3 As shown, the display area AA is provided with a plurality of touch electrodes SE arranged in an array along the row direction X and the column direction Y. M touch electrodes SE adjacent to each other along the row direction X or the column direction Y constitute a touch electrode group 10, and the display area AA includes a plurality of touch electrode groups 10 arranged in an array. The figure only shows a part of the display area AA and the touch electrode groups 10 in the display area AA, and does not show all the touch electrode groups 10. It is known to those skilled in the art that the touch display panel should include a plurality of touch electrodes 10 as shown in FIG. Figure 3 The touch electrode group 10 is arranged.

[0045] The embodiment of the present invention does not limit the number and specific arrangement of the touch electrodes SE in a touch electrode group 10. Figure 3 In the example, M is 2, and one touch electrode group 10 includes two touch electrodes SE arranged along the column direction Y. In other embodiments of the present invention, Figure 4 A schematic diagram of another touch display panel provided by an embodiment of the present invention, referring to Figure 4, M may be 4, and one touch electrode group 10 includes 4 touch electrodes SE, and the 4 touch electrodes SE are arranged along the row direction X and the column direction Y. In an embodiment not shown in the present invention, M may be any integer greater than or equal to 2, and the arrangement of the touch electrodes SE in the same touch electrode group 10 may be designed according to actual needs, which is not specifically limited in the embodiment of the present invention.

[0046] Continue to refer Figure 3 and Figure 4 The non-display area NA surrounds at least a portion of the display area AA. The non-display area NA is a frame area for arranging related wiring components and is not used for displaying images. In the embodiment of the present invention, the non-display area NA is provided with a first control circuit 20, a second control circuit 30, a common signal line 50, a switch control line 60, and a touch fan-out line TX.

[0047] The first control circuit 20 includes a plurality of multi-way selection circuits 201, and the number of the multi-way selection circuits 201 may be the same as the number of the touch electrode groups 10. A multi-way selection circuit 201 includes a plurality of gate switches 2011, and the number of the gate switches 2011 may be the same as the number of the touch electrodes SE in a touch electrode group 10. For example, Figure 3 As shown, a multiplexer circuit 201 includes two gate switches 2011, or, as shown in FIG. Figure 4 As shown, a multiplexer circuit 201 includes four selection switches 2011 .

[0048] Continue to refer Figure 3 and Figure 4 As shown, the control end of the enable switch 2011 is electrically connected to the enable control line 40, the first end of the enable switch 2011 is electrically connected to the touch fan-out line TX, the second end of the enable switch 2011 is electrically connected to the touch electrode SE, and the other end of the touch fan-out line TX can be connected to a driving chip (not shown in the figure).

[0049] Among them, the touch electrode SE can be a mutual capacitance touch electrode or a self-capacitive touch electrode. When the touch electrode SE is a mutual capacitance touch electrode, the touch electrode SE can be a touch driving electrode or a touch sensing electrode. When the touch electrode SE is a touch driving electrode, the driver chip can provide a touch driving signal to the touch electrode SE through the touch fan-out line TX and the gate switch 2011; when the touch electrode SE is a touch sensing electrode, the driver chip can receive the touch sensing signal fed back by the touch electrode SE through the touch fan-out line TX and the gate switch 2011; when the touch electrode SE is a self-capacitive touch electrode, in the touch driving stage, the driver chip can provide a touch driving signal to the touch electrode SE through the touch fan-out line TX and the gate switch 2011, and in the touch sensing stage, the driver chip can receive the touch sensing signal fed back by the touch electrode SE through the touch fan-out line TX and the gate switch 2011. The specific touch mode of the touch electrode SE can be designed according to actual needs, and the embodiment of the present invention does not specifically limit this. For the convenience of description, without any special limitation, the embodiments of the present invention all take the touch driving electrodes in which the touch electrodes are mutual capacitive touch electrodes as an example to exemplarily illustrate the technical solutions of the embodiments of the present invention.

[0050] Continue to refer Figure 3 and Figure 4 As shown, since the control end of the gate switch 2011 is electrically connected to the gate control line 40, the gate switch 2011 can be turned on or off under the control of the gate control signal transmitted by the gate control line 40, and when the gate switch 2011 is turned on, the touch signal transmitted by the touch fan-out line TX can be written to the touch electrode SE. Among them, the type of the gate switch 2011 can be designed according to actual needs, and the embodiment of the present invention does not specifically limit this. In an optional embodiment, the gate switch 2011 may include a transistor, but is not limited to this. When the gate switch 2011 includes a transistor, the control end of the gate switch 2011 may refer to the gate of the transistor, the first end may refer to the source (drain) of the transistor, and the second end may refer to the drain (source) of the transistor.

[0051] Among them, different selection switches 2011 in the same multi-way selection circuit 201 are respectively connected to different selection control lines 40, each selection switch 2011 in the same multi-way selection circuit 201 is connected to the same touch fan-out line TX, and different selection switches 2011 in the same multi-way selection circuit 201 are respectively connected to different touch electrodes SE in the same touch electrode group 10, and the selection switches 2011 are electrically connected to the touchable electrodes SE in a one-to-one correspondence, that is, the M touch electrodes SE in the same touch electrode group 10 are electrically connected to one touch fan-out line TX through the M selection switches 2011 in the same multi-way selection circuit 201. In this way, one touch fan-out line TX can provide touch driving signals to the M touch electrodes SE in a time-sharing manner, thereby reducing the number of touch fan-out lines TX, optimizing the layout of the touch fan-out lines TX in the non-display area NA, and reducing the number of connection terminals between the driver chip and the touch fan-out line TX, thereby reducing the manufacturing cost and difficulty of the driver chip.

[0052] It can be understood that the number of the gate control lines 40 may be the same as the number of the touch electrodes SE in the touch electrode group 10. Figure 3 As shown, the gating control line 40 may include a first gating control line 401 and a second gating control line 402, wherein the first gating control line 401 is respectively connected to a gating switch 2011 in each multiplexer selection circuit 201, and the second gating control line 402 is respectively electrically connected to another gating switch 2011 in each multiplexer selection circuit 201. Figure 4 As shown, the gate control line 40 may include a first gate control line 401, a second gate control line 402, a third gate control line 403 and a fourth gate control line 404, and the first gate control line 401, the second gate control line 402, the third gate control line 403 and the fourth gate control line 404 are respectively electrically connected to four gate switches 2011 in the same multiple selection circuit 201. When each gate control line 40 transmits the enable level of the gate control signal in a time-sharing manner, each gate switch 2011 in the same multiple selection circuit 201 may be controlled to be turned on in a time-sharing manner, so as to provide a touch driving signal to each touch electrode SE in the same touch electrode group 10 in a time-sharing manner.

[0053] Continue to refer Figure 3 and Figure 4The second control circuit 30 includes a plurality of control switches 301. The control end of the control switch 301 is electrically connected to the switch control line 60, the input end of the control switch 301 is electrically connected to the common signal line 50, and the output end of the control switch 301 is electrically connected to the touch electrode SE. The control switch 301 is turned on or off under the control of the switch control signal transmitted by the switch control line 60. When the control switch 301 is turned on, the common signal provided by the common signal line 50 can be transmitted to the touch electrode SE. The number of the control switches 301 can be the same as the number of the touch electrodes SE, so that the control switches 301 can be connected to the touch electrodes SE in a one-to-one correspondence.

[0054] The number of switch control lines 60 and common signal lines 50 is not limited, and those skilled in the art can set them according to actual needs. For example, in some embodiments, the plurality of switch control lines 60 may include a first switch control signal line 601 and a second switch control signal line 602, and the plurality of common signal lines 50 may include a first common signal line 501 and a second common signal line 502, the first switch control signal line 601 and the second switch control signal line 602 are electrically connected to different control switches 301, respectively, and the first common signal line 501 and the second common signal line 502 are electrically connected to different control switches 301, respectively.

[0055] The second control circuit 30 can be used to provide a test common signal to the touch electrode SE during the VT test phase before the touch display panel leaves the factory, so as to detect the touch function of the touch display panel; when the touch electrode SE is multiplexed as the common electrode of each pixel in the touch display panel, the second control circuit 30 can also provide a display common signal to the touch electrode SE during the display phase during normal use of the touch display panel after leaving the factory, so as to be able to quickly charge the common electrode of the touch display panel.

[0056] In an exemplary embodiment, the touch display panel may also be provided with a plurality of test pads, a plurality of data terminals and a plurality of signal transmission lines; the test pads may be used to receive test signals, such as test common signals, switch control signals, selection control signals, etc.; the data terminals are used to bind with a driving chip or a flexible circuit board, and are used to receive display common signals, switch control signals, selection control signals, etc. provided by the driving chip or the flexible circuit board; the first end of each signal transmission line is electrically connected to each common signal line, each selection control signal line, each switch control signal line, etc., respectively, the second end of each signal transmission line is electrically connected to each data terminal, respectively, and each test pad is electrically connected between the first end and the second end of each signal transmission line. In this way, when performing a VT test, a corresponding test signal can be provided through the test pad, and the test signal can be transmitted to each common signal line, each selection control signal line, each switch control signal line, etc. through each signal transmission line, so as to be able to control the conduction or closing of each selection switch and control switch respectively, and control each turned-on selection switch and control switch to transmit a corresponding test signal to each touch electrode, so as to test the touch function; and in the display stage, the data terminal can receive a display signal (such as a display common signal) provided by the driving chip or the flexible circuit board, and provide it to each common signal line, each selection control signal line, each switch control signal line, etc. through each signal transmission line, so as to be able to control the conduction or closing of each selection switch and control switch respectively, so that the turned-on selection switch and control switch can simultaneously transmit the display signal to each touch electrode, so that the touch electrode acts as a common electrode and controls the display luminous brightness of the pixel together with the pixel electrode.

[0057] In this embodiment, in order to detect the short circuit of the touch fan-out line TX, the control switches 301 corresponding to the touch electrodes SE that are adjacent in the row direction X or the column direction Y and belong to different touch electrode groups 10 can be set, and they are electrically connected to different common signal lines 50 and different switch control lines 60, that is, the control switches 301 corresponding to the touch electrodes SE that are adjacent and belong to different touch electrode groups 10 are controlled by switch control signals transmitted by different switch control lines 60 to turn the control switches 301 on or off, and when the control switches 301 are turned on, the touch electrodes SE that are adjacent and belong to different touch electrode groups 10 can receive different common signals.

[0058] In an exemplary embodiment, Figure 3As shown, touch electrode SE2 and touch electrode SE3 are two touch electrodes SE that are adjacent and located in different touch electrode groups 10, touch electrode SE1 and touch electrode SE5 are two touch electrodes SE that are adjacent and located in different touch electrode groups 10, touch electrode SE2 and touch electrode SE6 are two touch electrodes SE that are adjacent and located in different touch electrode groups 10, touch electrode SE6 and touch electrode SE7 are two touch electrodes SE that are adjacent and located in different touch electrode groups 10, touch electrode SE3 and touch electrode SE7 are two touch electrodes SE that are adjacent and located in different touch electrode groups 10, touch electrode SE4 and touch electrode SE8 are two touch electrodes SE that are adjacent and located in different touch electrode groups 10, and so on. The control ends of the two control switches 301 electrically connected to the touch electrode SE2 and the touch electrode SE3 (touch electrode SE1 and touch electrode SE5, or touch electrode SE2 and touch electrode SE6) are respectively connected to the second switch control line 602 and the first switch control line 601; the input ends of the control switches 301 electrically connected to the touch electrode SE2 and the touch electrode SE3 (touch electrode SE1 and touch electrode SE5, or touch electrode SE2 and touch electrode SE6) are respectively connected to the first common signal line 501 and the second common signal line 502. Similarly, the control end of the control switch 301 electrically connected to the touch electrode SE6 and the touch electrode SE7 (touch electrode SE3 and touch electrode SE7, or touch electrode SE4 and touch electrode SE8) is respectively connected to the first switch control line 601 and the second switch control line 602; the input end of the control switch 301 electrically connected to the touch electrode SE6 and the touch electrode SE7 (touch electrode SE3 and touch electrode SE7, or touch electrode SE4 and touch electrode SE8) is respectively connected to the second common signal line 502 and the first common signal line 501.

[0059] In another exemplary embodiment, Figure 4As shown, adjacent touch electrodes in different touch electrode groups 10 may include touch electrode SE2 and touch electrode SE3, touch electrode SE6 and touch electrode SE7, touch electrode SE5 and touch electrode SE9, touch electrode SE6 and touch electrode SE10, touch electrode SE10 and touch electrode SE11, touch electrode SE14 and touch electrode SE15, touch electrode SE7 and touch electrode SE11, touch electrode SE8 and touch electrode SE12, etc. The control end of the control switch 301 electrically connected to the touch electrode SE2 and the touch electrode SE3 (touch electrode SE6 and touch electrode SE7, touch electrode SE5 and touch electrode SE9, or touch electrode SE6 and touch electrode SE10) is respectively connected to the second switch control line 602 and the first switch control line 601; the input end of the control switch 301 electrically connected to the touch electrode SE2 and the touch electrode SE3 (touch electrode SE6 and touch electrode SE7, touch electrode SE5 and touch electrode SE9, or touch electrode SE6 and touch electrode SE10) is respectively connected to the first common signal line 501 and the second common signal line 502. The control end of the control switch 301 electrically connected to the touch electrode SE10 and the touch electrode SE11 (touch electrode SE14 and touch electrode SE15, touch electrode SE7 and touch electrode SE11, or touch electrode SE8 and touch electrode SE12) is respectively connected to the first switch control line 601 and the second switch control line 602; the input end of the control switch 301 electrically connected to the touch electrode SE10 and the touch electrode SE11 (touch electrode SE14 and touch electrode SE15, touch electrode SE7 and touch electrode SE11, or touch electrode SE8 and touch electrode SE12) is respectively connected to the second common signal line 502 and the first common signal line 501.

[0060] It is understandable that the above description is only exemplarily described by taking the touch display panel including two common signal lines 50 as an example, and in the embodiment of the present invention, the number of common signal lines can be designed according to actual needs, and the embodiment of the present invention does not specifically limit this. When the touch display panel includes multiple common signal lines 50, at least some of the common signal lines 50 can transmit different common signals, so that the touch electrodes SE adjacent to each other and belonging to different touch electrode groups 10 can receive different common signals, so that the pixels corresponding to the touch electrodes SE adjacent to each other and belonging to different touch electrode groups 10 can present different display colors, so that when the gate switch electrically connected to the touch electrodes SE adjacent to each other and belonging to different touch electrode groups 10 is controlled to be turned on, the short circuit of the adjacent touch fan-out line TX can be determined according to the display colors of the pixels corresponding to the two touch electrodes SE.

[0061] The specific implementation method of the short circuit detection on the touch fan-out line TX can be designed according to actual needs, and the embodiment of the present invention does not make any specific limitation on this.

[0062] Optionally, the touch display panel includes a touch short circuit detection stage; in the touch short circuit detection stage, each common signal line 50 transmits a different common signal respectively.

[0063] It can be understood that the touch short circuit detection stage can be performed in the VT test stage. In the touch short circuit detection stage, the touch electrodes SE adjacent to each other and belonging to different touch electrode groups 10 receive different common signals, so that the display area AA can present a checkerboard pattern with the touch electrode group 10 as a unit. At the same time, since the multi-way selection circuits 201 corresponding to different touch electrode groups 10 are connected to different touch fan-out lines TX, when the touch fan-out lines TX corresponding to the adjacent multi-way selection circuits 201 are not short-circuited, the potentials of the touch electrodes SE in the adjacent touch electrode groups 10 are different (the potentials corresponding to different common signals), so that the pixels corresponding to the touch electrodes SE in the adjacent touch electrode groups 10 display different colors. When the touch fan-out lines TX corresponding to the adjacent multi-way selection circuits 201 are short-circuited, a loop is formed between the touch electrodes SE in the adjacent touch electrode groups 10, and the potentials of the touch electrodes SE in the adjacent touch electrode groups 10 are the same (the potential value between the potentials corresponding to different common signals), and the pixels corresponding to the touch electrodes SE in the different touch electrode groups 10 that form the loop display the same color. Based on this, the short circuit condition of the touch fan-out line TX can be determined according to the checkerboard condition displayed in the display area AA.

[0064] In an exemplary embodiment, Figure 3 Taking the touch display panel shown as an example, in the touch short circuit detection stage, the enable level of the switch control signal can be provided to the first switch control line 601 and the second switch control line 602, so that the control switches 301 are all turned on. The first common signal line 501 transmits a high-level test common signal (for example, a 5V voltage), and the second common signal line 502 transmits a low-level test common signal (for example, a 0V voltage); at the same time, the enable level of the selection control signal can be provided to the first selection control line 401 and the second selection control line 402, and each selection switch 2011 is turned on; if the touch fan-out line TX1 and the touch fan-out line TX2 electrically connected to the touch electrode SE2 and the touch electrode SE3 are not short-circuited, the display colors of the pixels corresponding to the touch electrode SE2 and the touch electrode SE3 are white and black, respectively (such as Figure 3 shown).

[0065] In another exemplary embodiment, Figure 5 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention, referring to Figure 5, if the touch fan-out line TX1 and the touch fan-out line TX2 corresponding to the touch electrode SE2 and the touch electrode SE3 are short-circuited, the potential of the touch electrode SE2 and the touch electrode SE3 are the same and between 0-5V, and the display colors of the pixels corresponding to the touch electrode SE2 and the touch electrode SE3 are both gray. Therefore, by observing the display colors of the pixels corresponding to the touch electrode SE2 and the touch electrode SE3, it can be determined whether the touch fan-out line TX1 and the touch fan-out line TX2 are short-circuited. Or, in other optional embodiments, for Figure 3 In the case shown, the enable level of the selection control signal can also be provided to the first selection control line 401 and the second selection control line 402 separately, so that the selection switch 2011 electrically connected to the first selection control line 401 or the second selection control line 402 is turned on, and the other selection switches 2011 are turned off. Whether the touch fan-out line TX1 and the touch fan-out line TX2 are short-circuited is determined by observing the display color of the pixel corresponding to the touch electrode SE1 (SE2) and the touch electrode SE3 (SE4). The short-circuit detection method of the touch fan-out lines TX3 and TX4 is the same as that of the touch fan-out lines TX1 and the touch fan-out lines TX2, which will not be repeated here.

[0066] It should be noted that Figure 5 and Figure 3 The difference is that Figure 3 The display image presented by the touch display panel shown in the figure indicates that the touch fan-out line TX1 and the touch fan-out line TX2, as well as the touch fan-out line TX3 and the touch fan-out line TX4 are not short-circuited. Figure 5 The display image presented by the touch display panel shown indicates that the touch fan-out line TX1 and the touch fan-out line TX2 , as well as the touch fan-out line TX3 and the touch fan-out line TX4 are short-circuited.

[0067] In yet another exemplary embodiment, Figure 4Taking the touch display panel shown as an example, in the touch short circuit detection stage, the enable level of the switch control signal can be provided to the first switch control line 601 and the second switch control line 602, and the control switch 301 is turned on. The first common signal line 501 transmits a high-level test common signal (for example, a 5V voltage), and the second common signal line 502 transmits a low-level test common signal (for example, a 0V voltage). At the same time, the first selection control line 401 and the second selection control line 402 both transmit the enable level of the selection control signal, so that the selection switch 2011 connected to the first selection control line 401 and the second selection control line 402 is turned on, and the remaining selection switches 2011 are turned off. If the touch fan-out line TX1 and the touch fan-out line TX2 corresponding to the touch electrode SE2 and the touch electrode SE3 are not short-circuited, the display colors of the pixels corresponding to the touch electrode SE2 and the touch electrode SE3 are white and black, respectively. If the touch fan-out lines TX1 and TX2 corresponding to the touch electrodes SE2 and SE3 are short-circuited, the potentials of the touch electrodes SE2 and SE3 are the same and between 0-5V, and the display colors of the pixels corresponding to the touch electrodes SE2 and SE3 are both gray. Therefore, it is possible to determine whether the touch fan-out lines TX1 and TX2 are short-circuited by observing the colors of the touch electrodes SE2 and SE3. The short-circuit detection is performed on the other adjacent touch fan-out lines TX in the same way. The similarities can be referred to the above description and will not be repeated here.

[0068] In other optional embodiments, for Figure 4 The display panel shown can also provide an enable level of the selection control signal to one of the first selection control line 401, the second selection control line 402, the third selection control line 403 and the fourth selection control line 404 separately. At this time, by observing the display color of the pixels corresponding to the touch electrode SE1 and the touch electrode SE3, or the touch electrode SE2 and the touch electrode SE4, or the touch electrode SE5 and the touch electrode SE7, or the touch electrode SE6 and the touch electrode SE8, it can also be determined whether the touch fan-out line TX1 and the touch fan-out line TX2 are short-circuited. Alternatively, in other optional embodiments, the enable level of the selection control signal can also be provided to the first selection control line 401, the second selection control line 402, the third selection control line 403 and the fourth selection control line 404 at the same time, so as to observe the display color of the pixels corresponding to the touch electrode SE1, the touch electrode SE2, the touch electrode SE3, the touch electrode SE4, the touch electrode SE5, the touch electrode SE6, the touch electrode SE7 and the touch electrode SE8, so as to judge whether the touch fan-out line TX1 and the touch fan-out line TX2 are short-circuited. The other adjacent touch fan-out lines TX are short-circuited in the same way, and the similarities can be referred to the above description, which will not be repeated here.

[0069] Through the above scheme, the short circuit situation between at least some adjacent touch fan-out lines TX can be detected in the touch short circuit detection stage, and the detection capability of the short circuit of the touch fan-out line TX is improved on the basis of meeting the touch performance, thereby improving the reliability of touch detection.

[0070] In addition, in the touch short circuit detection stage, if the control selection switch 2011 is all closed, and the test common signal is provided to each touch electrode SE in cooperation with the switch control line 60 and the common signal line 50, the performance of the touch electrode SE can be detected according to the display of the pixel corresponding to each touch electrode SE, so as to ensure the manufacturing yield of the touch electrode SE. Exemplarily, the enable level of the switch control signal can be provided to different switch control lines 60, so that the control switches 301 are all turned on, and the touch electrodes SE in the adjacent touch electrode groups 10 receive different test common signals, so that the display area AA presents a black and white checkerboard. Whether there is an abnormal touch electrode can be determined by the display of the black and white checkerboard.

[0071] In this embodiment, the control switches electrically connecting the touch electrodes that are adjacent and belong to different touch electrode groups are connected to different common signal lines and different switch control lines. In the touch short circuit detection stage, different test common signals can be provided to the touch electrodes that are adjacent and belong to different touch electrode groups, so that the display area can present a chessboard with the touch electrode group as a unit, thereby determining the short circuit of the touch fan-out line according to the situation of the displayed chessboard, improving the detection capability of the touch fan-out line short circuit, and improving the reliability of touch detection.

[0072] It should be noted that the above description only exemplifies the connection relationship between two adjacent touch electrodes SE located in different touch electrode groups 10 and the control switch 301, as well as the touch detection method. The connection relationship between each touch electrode SE in the same touch electrode group 10 and the control switch 301 can be designed according to actual needs. The embodiment of the present invention does not make specific limitations on this. The following will exemplarily illustrate the typical implementation method and the technical solution of the embodiment of the present invention.

[0073] Optionally, among the touch electrodes SE located in the same row, the control switch 301 electrically connected to the touch electrodes SE of the same touch electrode group 10 is electrically connected to the same switch control line 60 and the same common signal line 50; and / or, among the touch electrodes SE located in the same column, the control switch 301 electrically connected to the touch electrodes SE of the same touch electrode group 10 is electrically connected to the same switch control line 60 and the same common signal line 50.

[0074] In an exemplary embodiment, referring to Figure 3, the touch electrodes SE in the same touch electrode group 10 are arranged along the column direction Y. Under this arrangement, in the same touch electrode group 10, the control switch 301 electrically connected to the M (taking M equal to 2 as an example) touch electrodes SE arranged along the column direction Y can be electrically connected to the same switch control line 60 to receive the switch control signal transmitted by the same switch control line 60; and the control switch 301 electrically connected to the M touch electrodes SE arranged along the column direction Y can be electrically connected to the same common signal line 50 to receive the common signal transmitted by the same common signal line 50.

[0075] In another exemplary embodiment, referring to Figure 4 , the touch electrodes SE in the same touch electrode group 10 are arranged along the row direction X and the column direction Y, respectively. Under this arrangement, in the same touch electrode group 10, the control switch 301 electrically connected to the Q touch electrodes SE (taking Q equal to 2 as an example) arranged along the row direction X and the P touch electrodes SE (taking P equal to 2 as an example, and Q*P equal to M) arranged along the column direction Y can be electrically connected to the same switch control line 60 to receive the switch control signal transmitted by the same switch control line 60; and the control switch 301 electrically connected to the M touch electrodes SE arranged along the row direction X and the column direction Y can be electrically connected to the same common signal line 50 to receive the common signal transmitted by the same common signal line 50.

[0076] In this way, the control switches 301 electrically connected to the same touch electrode group 10 can be turned on and off at the same time, and can transmit the same common signal to the touch electrode SE. In the touch short circuit detection stage, if the touch fan-out line TX is not short-circuited, the pixels corresponding to the M touch electrodes SE in the same touch electrode group 10 all display the same color, so that the display area AA can present a checkerboard with the touch electrode group 10 as a unit, thereby meeting the detection requirements of the touch fan-out line and improving the accuracy of touch detection.

[0077] In an optional embodiment, continue to refer to Figure 3 In each touch electrode SE located in the same column, the gate switches 2011 electrically connected to two adjacent touch electrodes SE belonging to different touch electrode groups 10 are respectively electrically connected to different gate control lines 40 .

[0078] In an exemplary embodiment, Figure 3Taking the touch electrode SE2 and the touch electrode SE3 in the touch display panel as an example, the touch electrode SE2 and the touch electrode SE3 are two touch electrodes SE adjacent to each other along the column direction Y and belonging to different touch electrode groups 10. The control ends of the gate switch 2011 electrically connected to the touch electrode SE2 and the gate switch 2011 electrically connected to the touch electrode SE3 are respectively connected to different gate control lines 40 to receive different gate control signals. For example, the gate switch 2011 electrically connected to the touch electrode SE2 is connected to the second gate control line 402, and the gate switch 2011 electrically connected to the touch electrode SE3 is connected to the first gate control line 401. In this way, the touch electrodes SE adjacent to each other along the column direction Y and belonging to different touch electrode groups 10 can receive the touch driving signal in time division, and provide the test common signal for touch detection to the touch fan-out line TX in time division, so that the touch electrodes SE adjacent to each other and belonging to different touch electrode groups 10 can perform touch detection in time division.

[0079] Figure 3 In the touch display panel shown, along the row direction X from left to right, among the selection switches 2011 electrically connected to the touch electrodes SE in the same column, the selection control lines 40 connected to any two adjacent selection switches 2011 electrically connected to any two adjacent touch electrodes SE are respectively the first selection control line 401 and the second selection control line 402, so that the two selection switches 2011 electrically connected to two adjacent touch electrodes SE belonging to different touch electrode groups 10 can respectively receive different selection control signals, so that the two selection switches 2011 can be turned on in time-sharing or at the same time, so as to realize checkerboard display with the touch electrode group 10 as a unit, and then touch detection is performed on each touch electrode group 10 according to the checkerboard display situation.

[0080] In other optional embodiments, Figure 6 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention, referring to Figure 6 The control switches 301 that electrically connect the adjacent touch electrodes SE belonging to the same touch electrode group 10 may be arranged to be electrically connected to different common signal lines 50 .

[0081] For example, Figure 6 As shown, the same touch electrode group 10 includes two touch electrodes SE arranged along the column direction Y. For example, the touch electrode SE1 and the touch electrode SE2 are two touch electrodes SE adjacent to each other and located in the same touch electrode group 10 .

[0082] by Figure 6Taking the touch display panel shown in FIG. 1 as an example, in the same touch electrode group 10, the control switches 301 electrically connected to two adjacent touch electrodes SE can be connected to different common signal lines 50 respectively, so as to provide different common signals to the adjacent touch electrodes SE belonging to the same touch electrode group 10. At this time, one of the two adjacent touch electrodes SE in the same touch electrode group 10 receives the first common signal transmitted by the first common signal line 501, and the other receives the second common signal transmitted by the second common signal line 502. The pixels corresponding to the touch electrodes SE in the same touch electrode group 10 are displayed in a checkerboard pattern, so that the touch detection of the touch electrodes SE can be performed according to the display status of the pixels.

[0083] It should be noted that, on the basis that the touch electrodes SEs that are adjacent and belong to the same touch electrode group 10 respectively receive the common signal that is not provided with the common signal line 50 for transmission, the control switches 301 electrically connected to the touch electrodes SEs that are adjacent and belong to the same touch electrode group 10 can be connected to the same or different switch control lines 60, and the embodiments of the present invention are not limited to this.

[0084] As a feasible embodiment, continue to refer to Figure 6 The control switches 301 electrically connected to the adjacent touch electrodes SE belonging to the same touch electrode group 10 are electrically connected to different switch control lines 60 .

[0085] Specifically, when the control switches 301 electrically connected to adjacent touch electrodes SE in the same touch electrode group 10 are electrically connected to different switch control lines 60 respectively, the control switches 301 corresponding to the adjacent touch electrodes SE can be turned on in different time periods, and different common signals can be transmitted to the corresponding touch electrodes SE in different time periods. Figure 6As shown, the control end of the control switch 301 electrically connected to the touch electrode SE1 is electrically connected to the second switch control line 602, and the input end is electrically connected to the first common signal line 501. When the switch control signal transmitted by the second switch control line 602 controls the control switch 301 to be turned on, the first common signal (for example, a test common signal of a high level signal) transmitted by the first common signal line 501 can be provided to the touch electrode SE1, so that the display color of the pixel corresponding to the touch electrode SE1 is white; the control end of the control switch 301 electrically connected to the touch electrode SE2 is electrically connected to the first switch control line 601, and the input end is electrically connected to the first common signal line 501. The two common signal lines 502 are electrically connected. When the switch control signal transmitted by the first switch control line 601 controls the control switch 301 to be turned on, the second common signal (for example, a test common signal of a low-level signal) transmitted by the second common signal line 502 can be provided to the touch electrode SE2, so that the display color of the pixel corresponding to the touch electrode SE2 is black. In this way, the pixels corresponding to the two adjacent touch electrodes SE display different colors respectively, so that the touch display panel can realize a checkerboard display, and then the touch electrode SE can be accurately and efficiently detected through the checkerboard display of the touch display panel.

[0086] In other feasible embodiments, the control switches electrically connected to the touch electrodes that are adjacent and belong to the same touch electrode group may also be electrically connected to the same switch control line. In this case, the control switches corresponding to the adjacent touch electrodes may be turned on at the same time, and different common signals may be transmitted to the corresponding touch electrodes at the same time, so that the adjacent touch electrodes can also present different display colors, thereby accurately detecting the touch electrodes.

[0087] Optional, continue to refer to Figure 6 , two adjacent touch electrode groups 10 are respectively a first touch electrode group 101 and a second touch electrode group 102; there is a first touch electrode in the first touch electrode group 101, and there is a second touch electrode SE20 in the second touch electrode group 102; the control switch 301 corresponding to the first touch electrode SE10 and the control switch 301 corresponding to the second touch electrode SE20 are electrically connected to different common signal lines 50; the selection switch 2011 corresponding to the first touch electrode SE10 and the selection switch 2011 corresponding to the second touch electrode SE20 are electrically connected to the same selection control line 40.

[0088] like Figure 6As shown, of the two touch electrode groups 10 arranged in the column direction Y and adjacent to each other, one is the first touch electrode group 101, and the other is the second touch electrode group 102. The first touch electrode group 101 includes at least one first touch electrode SE10, and the second touch electrode group 102 includes at least one second touch electrode SE20. In other words, the first touch electrode SE10 and the second touch electrode SE20 belong to two adjacent touch electrode groups 10, respectively.

[0089] The control switches 301 electrically connected to the first touch electrode SE10 and the second touch electrode SE20 are electrically connected to different switch control lines 60, respectively, and the selection switches 2011 electrically connected to the first touch electrode SE10 and the second touch electrode SE20 are connected to the same selection control line 40. The control switch 301 corresponding to the first touch electrode SE10 can be defined as the first control switch 3011, and the corresponding selection switch 2011 is the first selection switch 20111; the control switch 301 corresponding to the second touch electrode SE20 is the second control switch 3012, and the corresponding selection switch 2011 is the second selection switch 20112. The input ends of the first control switch 3011 and the second control switch 3012 can be electrically connected to the first common signal line 501 and the second common signal line 502, respectively, and the control ends of the first selection switch 20111 and the second selection switch 20112 can be connected to the same selection control line 40. Figure 6 In the example, the first selection switch 20111 and the second selection switch 20112 are both connected to the first selection control line 401, but the invention is not limited thereto. In addition, the control ends of the first control switch 3011 and the second control switch 3012 can be respectively connected to the second switch control line 602 and the first switch control line 601, and the first ends of the first selection switch 20111 and the second selection switch 20112 are respectively connected to different touch fan-out lines TX.

[0090] In this setting mode, the first touch electrode SE10 and the second touch electrode SE20 corresponding to different selection switches 2011 controlled by the selection control signal transmitted by the same selection control line 40 can receive different common signals. In the touch short circuit detection stage, the first selection switch 20111 and the second selection switch 20112 can be controlled to be turned on, and the first control switch 3011 and the second control switch 3012 can be controlled to be turned on, so as to transmit the first common signal and the second common signal to the first touch electrode SE10 and the second touch electrode SE20. According to the display color of the pixel corresponding to the first touch electrode SE10 and the second touch electrode SE20, it can be detected whether the touch fan-out line TX corresponding to the first selection switch 20111 and the second selection switch 20112 is short-circuited.

[0091] Exemplary, reference Figure 6, taking the touch electrode group 10 adjacent to each other along the column direction Y as an example, the first type of touch electrode group 101 and the second type of touch electrode group 102, the control switches 301 corresponding to the touch electrode SE1 and the touch electrode SE4 are respectively connected to the first common signal line 501 and the second common signal line 502, and the corresponding selection switches 2011 are connected to the first selection control line 401; the control switches 301 corresponding to the touch electrode SE2 and the touch electrode SE3 are respectively connected to the second common signal line 502 and the first common signal line 501, and the corresponding selection switches 2011 are connected to the second selection control line 402; at this time, the touch electrode SE1 and the touch electrode SE2 can both be the first touch electrode SE10, and the touch electrode SE4 and the touch electrode SE3 can both be the second touch electrode SE20. It should be noted that, Figure 6 It is only exemplarily shown that the touch electrode SE1 is the first touch electrode SE10 and the touch electrode SE4 is the second touch electrode SE20, but it is not limited thereto and can be designed according to actual needs, which will not be described in detail here.

[0092] Continue to refer Figure 6 , the control ends of the selection switches 201 corresponding to the touch electrodes SE2 and SE3 which are adjacent and belong to different touch electrode groups 10 are electrically connected to the same second selection control line 402, and the control ends of the selection switches 201 corresponding to the touch electrodes SE1 and SE4 which belong to different touch electrode groups 10 are electrically connected to the same first selection control line 401. At this time, the selection switches 201 electrically connected to the touch electrodes SE2 and SE3 can be turned on at the same time, and the selection switches 201 electrically connected to the touch electrodes SE1 and SE4 can be turned on at the same time.

[0093] by Figure 6For example, in the touch short circuit detection stage, the enable level of the switch control signal can be provided to the first switch control line 601 and the second switch control line 602, and each control switch 301 is turned on. The first common signal line 501 transmits a high-level test common signal (for example, a 5V voltage), and the second common signal line 502 transmits a low-level test common signal (for example, a 0V voltage). At the same time, the enable level of the gate control signal can be provided to the first selection control line 401, and the selection switch 2011 connected to the first selection control line 401 is turned on. If the touch fan-out line TX1 and the touch fan-out line TX2 corresponding to the touch electrode SE1 and the touch electrode SE4 are not short-circuited, the display colors of the pixels corresponding to the touch electrode SE1 and the touch electrode SE4 are white and black, respectively. If the touch fan-out line TX1 and the touch fan-out line TX2 corresponding to the touch electrode SE1 and the touch electrode SE4 are short-circuited, the potentials of the touch electrode SE1 and the touch electrode SE4 are the same and between 0-5V, and the display colors of the pixels corresponding to the touch electrode SE1 and the touch electrode SE4 are both gray. Therefore, it is possible to determine whether the touch fan-out line TX1 and the touch fan-out line TX2 are short-circuited by observing the display colors of the pixels corresponding to the touch electrode SE1 and the touch electrode SE4. Correspondingly, when the enable level of the gate control signal is provided to the second gate control line 402, it is possible to determine whether the touch fan-out line TX1 and the touch fan-out line TX2 are short-circuited by observing the display colors of the pixels corresponding to the touch electrode SE2 and the touch electrode SE3. The specific principle is similar to the above and will not be repeated here. Similarly, the remaining adjacent touch fan-out lines TX can be short-circuited. In this way, the short-circuit conditions of most adjacent touch fan-out lines TX in the touch display panel can be detected to improve the reliability of touch detection.

[0094] It should be noted that, in the above embodiments, the description is made by taking the case where the same column direction Y includes an even number (specifically, two) of touch electrode groups 10 as an example. Figure 7 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention, Figure 8 A structural diagram of another touch display panel provided in an embodiment of the present invention can be referred to Figure 7 and Figure 8 In other possible embodiments, the same column direction Y may include an odd number of touch electrode groups 10 , and the figure takes 3 as an example for illustration, but is not limited thereto.

[0095] Figure 7 and Figure 8In the touch display panel shown, during the touch short-circuit detection phase, the short-circuit conditions of at least some adjacent touch fan-out lines TX (such as touch fan-out line TX1 and touch fan-out line TX2, touch fan-out line TX2 and touch fan-out line TX3, touch fan-out line TX4 and touch fan-out line TX5, touch fan-out line TX5 and touch fan-out line TX6) can also be detected according to the checkerboard display situation of the display area AA. The specific detection scheme is the same as the detection scheme described in the above embodiments, and will not be elaborated here.

[0096] Optionally, continue to refer to Figure 7 and Figure 8 , the multiplexing circuits 201 electrically connected to the touch electrode groups 10 in the same column form a multiplexing circuit group 200; in the same multiplexing circuit group 200, the multiplexing circuit 201 electrically connected to the touch electrode group 10 in the i-th row is the i-th multiplexing circuit 201; when the number of touch electrode groups 10 in the same column is N, 1 ≤ i ≤ N, both i and N are positive integers; along the row direction X of the touch electrodes, the touch fan-out lines TX are arranged in sequence; adjacent N touch fan-out lines TX form a touch fan-out line group 70; each touch fan-out line TX in the same touch fan-out line group 70 is electrically connected to each multiplexing circuit 201 in the same multiplexing circuit group 200; wherein, in the correspondingly electrically connected touch fan-out line group 70 and multiplexing circuit group 200, the arrangement serial number of the touch fan-out line TX is the same as the arrangement serial number of the multiplexing circuit group 200, that is, in any correspondingly electrically connected touch fan-out line group 70 and multiplexing circuit group 200, the n-th multiplexing circuit 201 is electrically connected to the n-th touch fan-out line TX, 1 ≤ n < N, and n is an integer.

[0097] Specifically, as shown in Figure 7 and Figure 8 , the same multiplexing circuit group 200 may include N multiplexing circuits 201. The N multiplexing circuits 201 can be arranged along the row direction X, and the N multiplexing circuits 201 are respectively and correspondingly connected to a plurality of touch electrode groups 10 arranged along the column direction Y, that is, the number of touch electrode groups 10 in the same column can be the same as the number of multiplexing circuits 201 in the same multiplexing circuit group 200. The touch electrodes SE in the touch electrode group 10 in the n-th row can be electrically connected to the multiplexing circuit 201 with the arrangement serial number of n in the same multiplexing circuit group 200. For example, the touch electrode group 10 in the i-th row and j-th column can be electrically connected to the i-th multiplexing circuit 201 in the j-th group of multiplexing circuit groups 200. When two touch electrodes SE arranged along the column direction Y are included in one touch electrode group 10, the two touch electrodes SE in the i-th row touch electrode group 10 are respectively electrically connected to the two selection switches 2011 in the i-th multiplexing circuit 201.

[0098] Among them, Figure 7and Figure 8 exemplarily shows three rows and two columns of touch electrode groups 10, with the left side being the first column of touch electrode groups 10 and the right side being the second column of touch electrode groups 10, and the touch electrodes SE in the first column of touch electrode groups 10 being electrically connected to the first group of multiple selection circuit groups 200. In the first column of touch electrode groups 10, the first row of touch electrode groups 10 are electrically connected to the first multiple selection circuit 201 in the first group of multiple selection circuit groups 200 (the multiple selection circuit 201 with an arrangement number of 1 in the multiple selection circuit group 200), the second row of touch electrode groups 10 are electrically connected to the second multiple selection circuit 201 in the first group of multiple selection circuit groups 200 (the multiple selection circuit 201 with an arrangement number of 2 in the multiple selection circuit group 200), and the third row of touch electrode groups 10 are electrically connected to the third multiple selection circuit 201 in the first group of multiple selection circuit groups 200 (the multiple selection circuit 201 with an arrangement number of 3 in the multiple selection circuit group 200). The connection relationship between the second column of touch electrodes 10 and the second multiplex selection circuit group 200 is similar.

[0099] Understandably, Figure 7 and Figure 8 The difference is that the connection modes of the gate switches 2011 in two adjacent multiplexer selection circuits 201 are different. For example, Figure 7 In the touch display panel shown, adjacent enable switches 2011 belonging to different multiplexer circuits 201 are electrically connected to different enable control lines 40, respectively. For example, in the same multiplexer circuit group 200, the second enable switch 2011 (the enable switch 2011 with an arrangement number of 2) of the first multiplexer circuit 201 is electrically connected to the second enable control line 402, and the first enable switch 2011 (the enable switch 2011 with an arrangement number of 1) of the second multiplexer circuit 201 is electrically connected to the first enable control line 401. Figure 8 In the touch display panel shown, in the same multi-way selection circuit group 200, adjacent selection switches 2011 belonging to different multi-way selection circuits 201 are electrically connected to the same selection control line 40, and adjacent selection switches 2011 in the same multi-way selection circuit group 200 are electrically connected to different selection control lines 40. For example, in the same multi-way selection circuit group 200, the second selection switch 2011 of the first multi-way selection circuit 201 and the first selection switch 2011 of the second multi-way selection circuit 201 are both electrically connected to the second selection control line 402; the last selection switch 2011 in the first multi-way selection circuit group 200 is electrically connected to the second selection control line 402, and the first selection switch 2011 in the second multi-way selection circuit group 200 is electrically connected to the first selection control line 401.

[0100] Continue to refer Figure 7 and Figure 8, the N touch fan-out lines TX electrically connected to the N multiplexer selection circuits 201 in the same multiplexer selection circuit group 200 constitute a touch fan-out line group 70. The N touch fan-out lines TX in the same touch fan-out line group 70 are respectively electrically connected to the N multiplexer selection circuits 201 in the same multiplexer selection circuit group 200. For example, three touch fan-out lines TX connected to three multiplexer selection circuits 201 in the same multiplexer selection circuit group 200 constitute a touch fan-out line group 70.

[0101] For example, Figure 7 and Figure 8 In the touch display panel shown, in the touch short circuit detection stage, the enable level of the switch control signal can be provided to the first switch control line 601 and the second switch control line 602, so that the control switch 301 is turned on. The first common signal line 501 transmits a high-level test common signal (for example, 5V voltage), and the second common signal line 502 transmits a low-level test common signal (for example, 0V voltage); at the same time, the enable level of the gate control signal can be provided to the first selection control line 401, and the selection switch 2011 connected to the first selection control line 401 is turned on, and the other selection switches 2011 are turned off.

[0102] like Figure 7 As shown, the short circuit detection method of any two adjacent touch fan-out lines TX in the same touch fan-out line group 70 is as follows: taking the adjacent touch fan-out lines TX2 and TX3 in the first touch fan-out line group 70 on the left as an example, if the touch fan-out lines TX2 and TX3 are not short-circuited, the touch electrode SE3 receives a 0V voltage, the touch electrode SE5 receives a 5V voltage, and the pixels corresponding to the touch electrode SE3 and the touch electrode SE5 are displayed in black and white respectively; if the touch fan-out lines TX2 and TX3 are short-circuited, the potentials of the touch electrodes SE3 and SE5 will be between 0-5V, and the pixels corresponding to the touch electrodes SE3 and SE5 will be displayed in gray. Therefore, it can be judged whether any two adjacent touch fan-out lines TX in the same touch fan-out line group 70 are short-circuited by displaying the screen. The short circuit detection method of two adjacent touch fan-out lines TX belonging to different touch fan-out line groups 70 is as follows: if the touch fan-out line TX3 and the touch fan-out line TX4 are short-circuited, the potential of the touch electrode SE5 and the touch electrode SE7 will be between 0-5V, and the sub-pixels corresponding to the touch electrode SE5 and the touch electrode SE7 will be displayed in gray. Figure 8 The touch display panel shown in the figure similarly performs short circuit detection on adjacent touch fan-out lines TX.

[0103] Figure 7 and Figure 8In the illustrated embodiment, the same column direction Y includes an odd number of touch electrode groups 10, and a plurality of multi-way selection circuits 201 arranged along the row direction X are electrically connected one-to-one with a plurality of touch fan-out lines TX arranged along the row direction X. There is no need to replace the touch fan-out lines TX, and the short circuit condition of any two adjacent touch fan-out lines TX can be detected by observing the checkerboard of the touch display panel.

[0104] Continue to refer Figure 3 and Figure 6 , the same column direction Y includes an even number of touch electrode groups 10, and the multiple multi-way selection circuits 201 arranged along the row direction X are electrically connected to the multiple touch fan-out lines TX arranged along the row direction X in a one-to-one correspondence, that is, along the direction from left to right as shown in the figure, the i-th multi-way selection circuit 201 is electrically connected to the i-th touch fan-out line TX. Under this setting mode, the touch fan-out line TX is close to the selection switch 2011 electrically connected to it, which is conducive to reducing the wiring difficulty. However, when performing touch short circuit detection, since the touch electrode SE electrically connected to the two touch fan-out lines TX adjacent to each other and located in different touch fan-out line groups 70 receives the same common signal, it is impossible to detect the short circuit of the two touch fan-out lines TX adjacent to each other and located in different touch fan-out line groups 70.

[0105] Specifically, in the touch short circuit detection stage, the enable level is transmitted to the first switch control line 601 and the second switch control line 602, and the control switches 301 are all turned on. The first common signal line 501 transmits a high level signal (for example, 5V voltage), and the second common signal line 502 transmits a low level signal (for example, 0V voltage). At the same time, the gate switch 2011 connected to the first gate control line 401 is controlled to be turned on. Figure 3, the touch fan-out line TX2 is electrically connected to the touch electrode SE3 and the touch electrode SE4 through the multi-way selection circuit 201, the touch fan-out line TX3 is electrically connected to the touch electrode SE5 and the touch electrode SE6 through the multi-way selection circuit 201, and the touch fan-out line TX4 is electrically connected to the touch electrode SE7 and the touch electrode SE8 through the multi-way selection circuit 201. When the first selection control line 401 (the second selection control line 402) provides an enable level, the selection switches 2011 corresponding to the touch electrode SE3 and the touch electrode SE5 (touch electrode SE4 and touch electrode SE6) are turned on. If the adjacent touch fan-out line TX2 and the touch fan-out line TX3 are short-circuited, the touch electrode SE3 and the touch electrode SE5 (touch electrode SE4 and touch electrode SE6) are connected to form a loop. Since the touch electrode SE3 and the touch electrode SE5 (touch electrode SE4 and touch electrode SE6) both receive a 0V voltage, regardless of whether the touch fan-out line TX2 and the touch fan-out line TX3 are short-circuited or not, the touch electrode SE3 and the touch electrode SE5 (touch electrode SE4 and touch electrode SE6) both display black, so it is impossible to determine whether the touch fan-out line TX2 and the touch fan-out line TX3 are short-circuited based on the checkerboard display. Figure 6 , when the first selection control line 401 (the second selection control line 402) transmits an enable level, the selection switches 2011 corresponding to the touch electrode SE4 and the touch electrode SE5 (touch electrode SE6 and touch electrode SE6) are turned on. If the adjacent touch fan-out line TX2 and the touch fan-out line TX3 are short-circuited, the touch electrode SE4 and the touch electrode SE5 (touch electrode SE3 and touch electrode SE6) are connected to form a loop. Since the touch electrode SE4 and the touch electrode SE5 (touch electrode SE3 and touch electrode SE6) both receive a 0V voltage (5V voltage), regardless of whether the touch fan-out line TX2 and the touch fan-out line TX3 are short-circuited or not, the touch electrode SE4 and the touch electrode SE5 (touch electrode SE3 and touch electrode SE6) both display black (white), so it is impossible to determine whether the touch fan-out line TX2 and the touch fan-out line TX3 are short-circuited based on the checkerboard display situation. Based on the above problems, the present invention also proposes the following optional embodiments.

[0106] Optional, Fig. 9 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention, Fig.10 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention is shown in FIG. Fig.11 A schematic diagram of the structure of another touch display panel provided in an embodiment of the present invention. In some embodiments, reference Fig. 9 and Fig.10, each multiplexer selection circuit 201 electrically connected to the touch electrode group 10 in the same column constitutes a multiplexer selection circuit group 200; in the same multiplexer selection circuit group 200, the multiplexer selection circuit 201 electrically connected to the touch electrode group 10 in the i-th row is the i-th multiplexer selection circuit 201; when the number of the touch electrode groups 10 in the same column is N, 1≤i≤N, i and N are both positive integers; along the row direction X of the touch electrodes SE, each touch fan-out line TX is arranged in sequence; the adjacent N touch fan-out lines TX constitute a touch fan-out line group 70; each touch fan-out line TX of the same touch fan-out line group 70 is respectively connected to The multiplexer circuits 201 in the same multiplexer circuit group 200 are electrically connected; wherein, two adjacent touch fan-out lines TX belonging to different touch fan-out line groups 70 are electrically connected to the s-th multiplexer circuit 201 and the k-th multiplexer circuit 201, respectively; wherein, 1≤s≤N, 1≤k≤N, and s and k are both even numbers, or, s and k are both odd numbers, that is, two adjacent touch fan-out lines TX belonging to different touch fan-out line groups 70 are electrically connected to the multiplexer circuits 201 with odd arrangement numbers, or, are electrically connected to the multiplexer circuits 201 with even arrangement numbers.

[0107] For details, please refer to Fig. 9 and Fig.10 , two adjacent touch fan-out lines TX in the adjacent touch fan-out line group 70 can be electrically connected to two multiplexer selection circuits 201 arranged at intervals. Fig. 9 As shown, two adjacent touch fan-out lines TX belonging to different touch fan-out line groups 70 are respectively the touch fan-out line TX2 and the touch fan-out line TX3, the touch fan-out line TX2 is electrically connected to the touch electrode SE through the second multiplex selection circuit 201 in the first multiplex selection circuit group 200, and the touch fan-out line TX3 is electrically connected to the touch electrode SE through the second multiplex selection circuit 201 in the second multiplex selection circuit group 200; Fig.10 In the embodiment shown, the touch fan-out line TX2 and the touch fan-out line TX3 are connected to the multiplexer circuit 201 in the same manner. In this configuration, the two touch fan-out lines TX of the second touch fan-out line group 70 are cross-connected to different multiplexer circuits 201 .

[0108] In addition, in the touch electrode group 10 electrically connected to any two adjacent touch fan-out lines TX, different touch electrodes SE electrically connected to the same gate control line 40 receive different common signals. Fig. 9 As shown, the touch electrode SE3 (touch electrode SE4) connected to the touch fan-out line TX2 and the touch electrode SE7 (touch electrode SE8) connected to the touch fan-out line TX3 are electrically connected to different common signal lines 50 through the control switch 301. Alternatively, as Fig.10As shown, the touch electrode SE3 (touch electrode SE4 ) connected to the touch fan-out line TX2 and the touch electrode SE7 (touch electrode SE8 ) connected to the touch fan-out line TX3 are electrically connected to different common signal lines 50 through the control switch 301 .

[0109] Fig. 9 and Fig.10 The difference between the embodiments is that Fig. 9 In the embodiment shown, the connection method between the touch electrode group 10 and the control switch 301, the switch control line 50, the common signal line 60, the multi-way selection circuit 201, and the gate control line 40 is the same as Figure 3 The embodiments shown are the same; Fig.10 In the embodiment shown, the connection method between the touch electrode group 10 and the control switch 301, the switch control line 50, the common signal line 60, the multi-way selection circuit 201, and the gate control line 40 is the same as Figure 6 The embodiments shown are identical.

[0110] In an exemplary embodiment, Fig. 9As shown, taking the case where each column includes two touch electrode groups 10, each multiplexer selection circuit group 200 includes two or more multiplexer selection circuits 201, and each touch fan-out line group 70 includes two touch fan-out lines TX as an example, the second multiplexer selection circuit 201 with an arrangement number of 2 in the second multiplexer selection circuit group 200 is electrically connected to the first touch fan-out line TX3 with an arrangement number of 1 in the second touch fan-out line group 70, and the first multiplexer selection circuit 201 with an arrangement number of 1 in the second multiplexer selection circuit group 200 is electrically connected to the second touch fan-out line TX4 with an arrangement number of 2 in the second touch fan-out line group 70. The touch fan-out line TX3 is electrically connected to the touch electrode SE7 and the touch electrode SE8 through the multiplexer selection circuit 201, and the touch fan-out line TX4 is electrically connected to the touch electrode SE5 and the touch electrode SE6 through the multiplexer selection circuit 201. In the touch short circuit detection stage, when the first selection control line 401 (and / or the second selection control line 402) transmits the enable level of the selection control signal, the selection switches 2011 corresponding to the touch electrode SE3 and the touch electrode SE7 (and / or the touch electrode SE4 and the touch electrode SE8) are turned on. If the adjacent touch fan-out line TX2 and the touch fan-out line TX3 are short-circuited, the touch electrode SE3 and the touch electrode SE7 (the touch electrode SE4 and the touch electrode SE8) are connected to form a loop. Since the touch electrode SE3 and the touch electrode SE7 (touch electrode SE4 and touch electrode SE8) receive different test common signals respectively, for example, 0V voltage and 5V voltage (or 5V voltage and 0V voltage) respectively, when the touch fan-out line TX2 and the touch fan-out line TX3 are short-circuited, the display color of the pixels corresponding to the touch electrode SE3 and the touch electrode SE7 (touch electrode SE4 and touch electrode SE8) is gray. At this time, it can be determined whether the touch fan-out line TX2 and the touch fan-out line TX3 are short-circuited based on the checkerboard display situation.

[0111] In another exemplary embodiment, Fig.11 As shown, the same column direction Y includes an odd number (3 in the figure as an example) of touch electrode groups 10. Figure 8 The difference from the embodiment shown is that, in this embodiment, two adjacent selection switches 2011 in adjacent multiple selection circuit groups 200 are electrically connected to the same selection control line 40. For example, the last selection switch 2011 in the first multiple selection circuit group 200 and the first selection switch 2011 in the second multiple selection circuit group 200 are both electrically connected to the second selection control line 402.

[0112] Based on the connection method between the gate switch 2011 and the gate control line 40, Fig.11 In the illustrated embodiment, in order to perform short circuit detection on adjacent touch fan-out lines TX that are adjacent and belong to different touch fan-out line groups 70 , some of the adjacent touch fan-out lines TX need to be replaced.

[0113] Specifically, Fig.11 As shown, two adjacent touch fan-out lines TX belonging to different touch fan-out line groups 70 are touch fan-out line TX3 and touch fan-out line TX4, respectively. Touch fan-out line TX3 is electrically connected to touch electrode SE through the third multiplex selection circuit 201 in the first multiplex selection circuit group 200, and touch fan-out line TX4 is electrically connected to touch electrode SE through the second multiplex selection circuit 201 in the second multiplex selection circuit group 200. Similarly, two adjacent touch fan-out lines TX in adjacent touch fan-out line groups 70 are electrically connected to two multiplex selection circuits 201 arranged at intervals. In this way, the first touch fan-out line TX4 and the second touch fan-out line TX5 of the second touch fan-out line group 70 are cross-connected to different multiplex selection circuits 201.

[0114] The short circuit detection method of the touch fan-out line TX3 and the touch fan-out line TX4 is as follows: in the touch short circuit detection stage, the enable level is transmitted to the first switch control line 601 and the second switch control line 602, and the control switches 301 are all turned on. The first common signal line 501 transmits a 5V voltage, and the second common signal line 502 transmits a 0V voltage. The enable level is transmitted to the first selection control line 401, and the selection switch 2011 connected to the first selection control line 401 is turned on. The control switches 301 corresponding to the touch electrode SE5 and the touch electrode SE9 transmit a 5V voltage and a 0V voltage respectively. If the touch fan-out line TX3 and the touch fan-out line TX4 are not short-circuited, the pixels corresponding to the touch electrode SE5 and the touch electrode SE9 are displayed in white and black respectively; if the touch fan-out line TX3 and the touch fan-out line TX4 are short-circuited, the touch electrode SE5 and the touch electrode SE9 form a loop, and the potentials of the two are the same, between 0-5V, and the pixels corresponding to the touch electrode SE5 and the touch electrode SE9 are displayed in gray. Therefore, whether the touch fan-out line TX3 and the touch fan-out line TX4 are short-circuited can be judged according to the checkerboard display situation.

[0115] Optional, Fig.12 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention is shown in FIG. Fig.13 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention, Fig.14 A schematic diagram of the structure of another touch display panel provided in an embodiment of the present invention. In some embodiments, reference Fig.12 and Fig.13 , when N is an even number, in the multiplexer selection circuit group 200 corresponding to the touch electrode group 10 in the jth column, the mth multiplexer selection circuit 201 is electrically connected to the touch fan-out line TX with the arrangement number m+1 in the jth touch fan-out line group 70, and the m+1th multiplexer selection circuit 201 is electrically connected to the touch fan-out line TX with the arrangement number m in the jth touch fan-out line group 70; wherein 1≤m≤N, and m is an odd number, and j is an even number. In other embodiments, reference Fig.14 When N is odd, in the multiplexing circuit group 200 corresponding to the touch electrode group 10 in the j-th column, the m-th multiplexing circuit 201 is electrically connected to the touch fan outlet TX with the arrangement serial number of m + 1 in the j-th touch fan outlet group 70, and the (m + 1)-th multiplexing circuit 201 is electrically connected to the touch fan outlet TX with the arrangement serial number of m in the j-th touch fan outlet group 70; where 1 ≤ m < N, m is odd, and j is a positive integer greater than 1.

[0116] As a feasible embodiment, Fig. 9 、 Fig.10 、 Fig.12 and Fig.13 show the case where N is even. At this time, the j-th column touch electrode group 10 can be electrically connected to the j-th touch fan outlet group 70 through the j-th multiplexing circuit group 200. The j-th column touch electrode group 10 can refer to any touch electrode group 10 located in an even column, the j-th multiplexing circuit group 200 can refer to any even-numbered multiplexing circuit group 200, and the j-th touch fan outlet group 70 can refer to any even-numbered touch fan outlet group 70. In this embodiment, it can be set that in the even-numbered multiplexing circuit group 200, the multiplexing circuit 201 with an odd arrangement serial number is electrically connected to the touch fan outlet TX with an even arrangement serial number, that is, the adjacent touch fan outlets TX in any even-numbered touch fan outlet group 70 are cross-connected to different multiplexing circuits 201. The touch fan outlets TX in the odd-numbered touch fan outlet groups 70 are connected to the multiplexing circuits 201 in the odd-numbered multiplexing circuit groups 200 in one-to-one correspondence according to the arrangement serial numbers.

[0117] Exemplarily, as Fig.12 shown, the first multiplexing circuit 201 in the second group of multiplexing circuit groups 200 is electrically connected to the second touch fan outlet TX4 in the second touch fan outlet group 70, and the second multiplexing circuit 201 in the second group of multiplexing circuit groups 200 is electrically connected to the first touch fan outlet TX3 in the second touch fan outlet group 70. The first multiplexing circuit 201 in the fourth group of multiplexing circuit groups 200 is electrically connected to the second touch fan outlet TX8 in the fourth touch fan outlet group 70, and the second multiplexing circuit 201 in the fourth group of multiplexing circuit groups 200 is electrically connected to the first touch fan outlet TX7 in the 4th touch fan outlet group 70. Thus, the touch fan outlets TX in the even-numbered touch fan outlet groups 70 are re-wired to ensure that the short-circuit conditions of any adjacent touch fan outlets TX can be accurately detected, further improving the reliability of touch detection. Fig.13 The same applies to the embodiments shown, and will not be elaborated here.

[0118] As another feasible embodiment, Fig.14The case where N is an odd number is shown. When the same column includes an odd number of touch electrode groups 10, the j-th column touch electrode group 10 may refer to any column touch electrode group 10 except the first column touch electrode group 10, the j-th multiplexer selection circuit group 200 may refer to any multiplexer selection circuit group 200 except the first multiplexer selection circuit group 200, and the j-th touch fan-out line group 70 may refer to any touch fan-out line group 70 except the first touch fan-out line group 70. In this embodiment, in any multiplexer selection circuit group 200 except the first multiplexer selection circuit group 200, the multiplexer selection circuit 201 with an odd arrangement number may be electrically connected to the touch fan-out line TX with an even arrangement number, that is, two adjacent touch fan-out lines TX in any touch fan-out line group 70 except the first touch fan-out line group 70 are cross-connected to different multiplexer selection circuits.

[0119] For example, Fig.14 As shown, the first multiplexer selection circuit 201 in the second multiplexer selection circuit group 200 is electrically connected to the second touch fan-out line TX4 in the second touch fan-out line group 70, and the second multiplexer selection circuit 201 in the second multiplexer selection circuit group 200 is electrically connected to the first touch fan-out line TX3 in the second touch fan-out line group 70. Similarly, two adjacent touch fan-out lines TX in each subsequent touch fan-out line group 70 are cross-connected to different multiplexer selection circuits 201, thereby switching any touch fan-out line group 70 except the first touch fan-out line group 70 to improve the reliability of touch detection.

[0120] It should be noted that when two adjacent touch fan-out lines are cross-connected to different multi-way selection circuits, corresponding signal lines need to be set for line switching when the two touch fan-out lines are connected to the multi-way selection circuit to prevent the signals transmitted by the two touch fan-out lines from interfering with each other. The specific implementation method can be designed according to actual needs, and the embodiment of the present invention does not make specific limitations on this.

[0121] Optional, Fig.15 for Fig. 9 A schematic diagram of a cross-sectional structure along the A-A' direction, combined with reference Fig. 9 and Fig.15 The non-display area NA of the touch display panel also includes a plurality of first connection lines 71 and a plurality of second connection lines 72 that are insulated from each other; the m-th multiplexer selection circuit 201 is electrically connected to the touch fan-out line TX through the first connection line 71; the m+1-th multiplexer selection circuit 201 is electrically connected to the touch fan-out line TX through the second connection line 72; the touch display panel includes a first conductive layer M1 and a second conductive layer M2 that are insulated and spaced apart; the first conductive layer M1 includes the first connection line 71, and the second conductive layer M2 includes the second connection line 72.

[0122] Specifically, Fig. 9 and Fig.15As shown, when two adjacent touch fan-out lines TX are cross-connected to different multiplexer circuits 201 through connecting lines, the mth multiplexer circuit 201 with the arrangement number m in the jth multiplexer circuit group 200 is electrically connected to the touch fan-out line TX with the arrangement number m+1 in the jth touch fan-out line group 70 through the first connecting line 71; the m+1th multiplexer circuit 201 with the arrangement number m+1 is electrically connected to the touch fan-out line TX with the arrangement number m in the jth touch fan-out line group 70 through the second connecting line 72. For example Fig. 9 As shown, in the second group of multiplexer selection circuits 200, the first multiplexer selection circuit 201 is electrically connected to the second touch fan-out line TX4 in the second touch fan-out line group 70 through the first connection line 71, and the second multiplexer selection circuit 201 is electrically connected to the first touch fan-out line TX3 in the second touch fan-out line group 70 through the second connection line 72. At this time, the first connection line 71 and the second connection line 72 cross each other, and in order to prevent the first connection line 71 and the second connection line 72 from being short-circuited, the first connection line 71 and the second connection line 72 can be respectively arranged in different film layers.

[0123] Correspondingly, the touch display panel includes a base substrate 80 and a plurality of conductive layers stacked on one side of the base substrate 80, and two adjacent conductive layers are insulated and spaced apart by an insulating layer 81. In this embodiment, the plurality of conductive layers include a first conductive layer M1 and a second conductive layer M2, and the first conductive layer M1 and the second conductive layer M2 may be two conductive layers arranged adjacently or spaced apart, which is not limited in this embodiment. Among them, the first connecting line 71 and the second connecting line 72 are respectively located in the above two conductive layers, so as to ensure that the two are insulated from each other and reduce the probability of short circuit of adjacent touch fan-out lines TX.

[0124] One thing that needs to be explained is that Fig.15 The cross-sectional view only shows part of the film structure of the touch display panel, such as part of the drive circuit film layer, and does not show the display-related film layers, such as the liquid crystal layer, etc. The remaining film structures not shown can be set according to actual needs, and the embodiment of the present invention does not repeat or limit this.

[0125] Optional, you can continue to refer to Fig.15 In some embodiments of the present invention, one of the first conductive layer M1 and the second conductive layer M2 further includes touch fan-out lines TX.

[0126] Exemplarily, the first connecting line 71 or the second connecting line 72 can be set on the same layer as the touch fan-out line TX, so that the first connecting line 71 or the second connecting line 72 and the touch fan-out line TX can be prepared in the same process flow, thereby simplifying the preparation process, reducing the difficulty of connecting the connecting line and the touch fan-out line TX, and realizing a lightweight touch display panel.

[0127] It should be noted that Fig.15The touch fan-out line TX is shown as being located in the second conductive layer M2, but is not limited thereto. In addition, in an embodiment not shown in the present invention, the touch display panel may further include a third conductive layer, the third conductive layer is insulated from both the first conductive layer M1 and the second conductive layer M2, and the touch fan-out line TX may be located in the third conductive layer. By setting the touch fan-out line TX and the first connecting line 71 and the second connecting line 72 in different layers, the number of wirings in each conductive layer can be reduced, thereby reducing the wiring difficulty.

[0128] In another embodiment of the present invention, Fig.16 for Fig. 9 Another cross-sectional structure diagram along the A-A' direction, refer to Fig.16 The first conductive layer M1 further includes a touch fan-out line TX electrically connected to the first connection line 71 ; and / or the second conductive layer M2 further includes a touch fan-out line TX electrically connected to the second connection line 72 .

[0129] For example, the touch fan-out line TX may include a first type of touch fan-out line (eg Fig. 9 and Fig.16 The touch fan-out line TX4 shown in FIG. 1 and the second type of touch fan-out line (eg Fig. 9 and Fig.16 As shown in the touch fan-out line TX3, the first type of touch fan-out line is electrically connected to the corresponding selection switch 2011 through the first connection line 71, and the second type of touch fan-out line is electrically connected to the corresponding selection switch 2011 through the second connection line 72. At this time, the first connection line 71 and the first type of touch fan-out line can be arranged to be located in the first conductive layer M1, and the second connection line 72 and the second type of touch fan-out line can be arranged to be located in the second conductive layer M2. In another possible implementation, the first connection line 71 and the first type of touch fan-out line can be arranged to be located in the first conductive layer M1, or the second connection line 72 and the second type of touch fan-out line can be arranged to be located in the second conductive layer M2. In this way, by arranging the electrically connected wirings in the same conductive layer and the mutually insulated wirings in different conductive layers, the probability of short circuit of adjacent touch fan-out lines TX can be further reduced.

[0130] In a possible embodiment, reference Figures 3 to 14 In any of the figures, the first control circuit 20 and the second control circuit 30 are respectively disposed on two opposite sides of the display area AA.

[0131] For example, Figure 3 For example, the first control circuit 20 is located in the non-display area NA below the display area AA, and the second control circuit 30 is located in the non-display area NA above the display area AA, but the present invention is not limited thereto. By arranging the first control circuit 20 and the second control circuit 30 in the non-display area NA on opposite sides of the display area AA, the border width of the touch display panel can be made relatively symmetrical, thereby improving the aesthetics of the touch display panel.

[0132] Optional, continue to refer to Figures 3 to 14 As shown in any of the accompanying drawings, the display area AA further includes a plurality of touch lines 73; each touch line 73 is electrically connected to each touch electrode SE in a one-to-one correspondence; one end of the touch line 73 is electrically connected to the control switch 301, and the other end of the touch line 73 is electrically connected to the selection switch 2011.

[0133] Specifically, the touch wiring 73 may extend along the column direction Y and be arranged in the row direction X, and the control switch 301 and the selection switch 2011 are respectively connected to the two ends of the touch wiring 73. In the touch short circuit detection stage, the second control circuit 30 may be used to transmit the test common signal to the touch electrode SE, and the first control circuit 20 may be combined to perform short circuit detection on the adjacent touch fan-out line TX. In the display stage, the first control circuit 20 and the second control circuit 30 may be used to transmit the display common signal at the same time, so that the display common signal is provided to the touch electrode SE from both sides of the touch fan-out line TX at the same time, which is conducive to reducing the voltage drop and ensuring the display effect.

[0134] It should be noted that Figures 3 to 14 The case where the touch electrodes SE and the control switches 301 are electrically connected in a one-to-one correspondence is described exemplarily, but in the present embodiment, the corresponding connection relationship between the touch electrodes SE and the control switches 301 is not limited to this. For example, each touch electrode SE may be connected to a plurality of control switches 301 so that the touch electrodes SE can receive different common signals respectively, or each control switch 301 may be connected to a plurality of touch electrodes SE so as to provide a common signal to the plurality of touch electrodes SE at the same time. The present embodiment does not make any specific limitation on this, provided that the core inventive point of the present embodiment can be achieved.

[0135] Optional, Fig.17 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention, Fig.18 A schematic diagram of the structure of another touch display panel provided by an embodiment of the present invention, referring to Fig.17 and Fig.18 , each touch electrode SE of the same touch electrode group 10 is electrically connected to the same control switch 301 .

[0136] Specifically, Fig.17 and Fig.18As shown, the M touch electrodes SE in one touch electrode group 10 are electrically connected to the same common signal line 50 through the same control switch 301. In the touch short circuit detection stage, each touch electrode SE in one touch electrode group 10 receives the same test common signal, so that the pixels corresponding to each touch electrode SE in the same touch electrode group 10 display the same color. At the same time, since two adjacent touch electrode groups 10 along the row direction X and the column direction Y receive different test common signals, the pixels corresponding to the two adjacent touch electrode groups 10 can display different colors, thereby realizing a checkerboard display with the touch electrode group 10 as the smallest unit.

[0137] For example, Fig.17 Taking the touch display panel shown as an example, the touch electrodes SE in the first touch electrode group 103 (or the fourth touch electrode group 104) are electrically connected to the first switch control line 601 and the first common signal line 501 through the control switch 301; the touch electrodes SE in the second touch electrode group 104 (or the third touch electrode group 105) are electrically connected to the second switch control line 602 and the second common signal line 502 through the control switch 301, and so on. Fig.17 In the description, the example of two touch electrode groups 10 in the same column is taken as an example, but the invention is not limited thereto. Fig.18 Taking the touch display panel shown as an example, the touch electrodes SE in the first touch electrode group 103 (or the third touch electrode group 105 or the fifth touch electrode group 107) are electrically connected to the first switch control line 601 and the first common signal line 501 through the control switch 301; the touch electrodes SE in the second touch electrode group 104 (or the fourth touch electrode group 106 or the sixth touch electrode group 108) are electrically connected to the second switch control line 602 and the second common signal line 502 through the control switch 301, and so on. Fig.18 In the example, the same column includes three touch electrode groups 10, which is not limited thereto. In this way, by setting each touch electrode SE of the same touch electrode group 10 to be electrically connected to the same control switch 301, the number of control switches 301 can be reduced, the layout of the second control circuit 30 can be optimized, and the structure of the touch display panel can be simplified while realizing the short circuit detection of some touch fan-out lines TX.

[0138] by Fig.18Taking the touch display panel shown as an example, in the touch short circuit detection stage, when the first switch control line 601 and the second switch control line 602 transmit the enable level of the switch control signal, the control switch 301 is turned on. The first common signal line 501 can transmit a high-level test common signal (for example, 5V voltage), and the second common signal line 502 can transmit a low-level test common signal (for example, 0V voltage). At the same time, the enable level of the gate control signal is provided to at least one of the first selection control line 401 and the second selection control line 402, so that at least part of the selection switch 2011 is turned on. At this time, it can be determined whether the two adjacent touch fan-out lines TX are short-circuited based on the display colors of the two groups of touch electrode groups 10 adjacent to the touch fan-out line TX. Taking the case where the first selection control line 401 and the second selection control line 402 transmit the enable level of the selection control signal at the same time, and the selection switches 2011 are all turned on as an example, for multiple touch fan-out lines TX in the same touch fan-out line group 70, if the touch fan-out line TX1 and the touch fan-out line TX2 are not short-circuited, the display color of the pixel corresponding to the touch electrode SE1 and the touch electrode SE2 is white, and the display color of the pixel corresponding to the touch electrode SE3 and the touch electrode SE4 is black; if the touch fan-out line TX1 and the touch fan-out line TX2 are short-circuited, the display color of the pixel corresponding to the touch electrode SE1-touch electrode SE4 is gray. The short-circuit detection method of the touch fan-out line TX2 and the touch fan-out line TX3, the touch fan-out line TX4 and the touch fan-out line TX5, and the touch fan-out line TX5 and the touch fan-out line TX6 is similar. For adjacent touch fan-out lines TX belonging to different groups, if touch fan-out lines TX3 and TX4 are not short-circuited, the pixel display color corresponding to touch electrodes SE5 and SE6 is white, and the pixel display color corresponding to touch electrodes SE7 and SE8 is black; if touch fan-out lines TX3 and TX4 are short-circuited, touch electrodes SE5-SE8 are all displayed in gray. According to the above scheme, short-circuit detection of any two adjacent touch fan-out lines TX can be realized.

[0139] In other optional embodiments, Fig.19 A structural diagram of another touch display panel provided by an embodiment of the present invention is shown in FIG. Fig.19As shown, when each touch electrode SE of the same touch electrode group 10 is electrically connected to the same control switch 301, and the same column includes an even number (for example, two) of touch electrode groups 10, in order to accurately detect the short circuit of the touch fan-out lines TX of adjacent touch fan-out line groups 70 belonging to different touch fan-out line groups 70, it is necessary to switch the lines of the touch fan-out lines TX corresponding to the touch electrode groups 10 of the even columns. For example, the first multiplexer selection circuit 201 with an arrangement number of 1 in the second group of multiplexer selection circuit groups 200 arranged from left to right is electrically connected to the touch fan-out line TX4 with an arrangement number of 2 in the second touch fan-out line group 70, and the second multiplexer selection circuit 201 with an arrangement number of 2 in the second group of multiplexer selection circuit groups 200 is electrically connected to the touch fan-out line TX3 with an arrangement number of 1 in the second touch fan-out line group 70. The specific line switching scheme can refer to the above description, which will not be described in detail here.

[0140] In other optional embodiments, in combination with reference Fig.18 or Fig.19 , the first control circuit 20 and the second control circuit 30 are arranged on the same side of the display area AA.

[0141] Exemplarily, the first control circuit 20 and the second control circuit 30 are located in the non-display area NA on the same side of the display area AA, for example, they can be located in the non-display area NA below the display area AA, but are not limited thereto. The first control circuit 20 and the second control circuit 30 are arranged as a whole in the non-display area NA on the same side of the display area AA, without occupying the area of ​​other non-display areas NA, which is conducive to reducing the width of other non-display areas NA.

[0142] The arrangement order of the first control circuit 20 and the second control circuit 30 along the column direction Y is not limited. Fig.18 and Fig.19 In the embodiment shown, the second control circuit 30 is exemplarily located at a side of the first control circuit 20 away from the display area AA, but is not limited thereto. This arrangement has the advantage of reducing the extension length of the touch fan-out line TX and reducing the loss of the touch signal during transmission.

[0143] In an optional embodiment, continue to refer to Fig.18 or Fig.19 The output end of the control switch 301 is electrically connected to the touch electrode SE through the touch fan-out line TX and the multi-way selection circuit 201 in sequence.

[0144] Specifically, Fig.18 or Fig.19As shown, when the second control circuit 30 is arranged on the side of the first control circuit 20 away from the display area AA, the control switch 301 can be directly electrically connected to the touch wiring 73 by using the touch fan-out line TX and the multi-way selection circuit 201. In other words, the control switch 301 in the second control circuit 30 is electrically connected to the corresponding touch electrode SE through the touch fan-out line TX and the gate switch 2011. In this way, the touch fan-out line TX and the gate switch 2011 are multiplexed as signal transmission lines between the second control circuit 30 and the touch electrode SE, which can reduce the number of wirings and simplify the structure of the touch display panel.

[0145] In an embodiment not shown in the present invention, the non-display area NA further includes a signal transmission line (not shown in the drawings), the output end of the control switch 301 is electrically connected to the touch wiring 73 through the signal transmission line, and the signal transmission line is insulated from the touch fan-out line TX. The control switch 301 is electrically connected to the touch electrode SE by using an additional signal transmission line, and the extension length of the signal transmission line is short, which is conducive to reducing the loss of the signal during the transmission process.

[0146] Optional, you can continue to refer to Fig.18 or Fig.19 The non-display area NA also includes a driving chip setting area NA1; the driving chip setting area NA1 is provided with a plurality of touch terminals 90; each touch terminal 90 is electrically connected to each touch fan-out line TX; and the control switch 301 is electrically connected to the touch fan-out line TX through the touch terminal 90.

[0147] Specifically, Fig.18 or Fig.19 As shown, the driver chip setting area NA1 can be set on the same side as the first control circuit 20 and the second control circuit 30, and the driver chip setting area NA1 is used to bind the driver chip (not shown in the figure). Exemplarily, the driver chip setting area NA1 can be located on the side of the first control circuit 20 away from the display area AA.

[0148] The driver chip setting area NA1 includes a plurality of touch terminals 90, and the touch terminals 90 and the touch fan-out lines TX can be electrically connected one by one. The driver chip is electrically connected to the touch fan-out lines TX through the touch terminals 90, and the touch signal can be provided by the driver chip to the touch electrode SE. Among them, at least part of the structure in the second control circuit 30 can be located on the side of the touch terminal 90 away from the display area AA, and each control switch 301 can be electrically connected to the touch fan-out line TX through each touch terminal 90, thereby realizing the electrical connection between the control switch 301 and the touch electrode SE.

[0149] The touch terminals 90 may be arranged along a row direction X. Fig.18 and Fig.19 Only part of the touch terminals 90 are shown, and not all of the touch terminals 90 are shown. Optionally, Fig.18and Fig.19 In the illustrated embodiment, in the orthographic projection of the plane where the touch display panel is located, the second control circuit 30 is located on the side of the straight line where the touch terminal 90 is located away from the first control circuit 20. The touch terminal 90 can serve as a boundary between the first control circuit 20 and the second control circuit 30, separating the first control circuit 20 from the second control circuit 30, thereby optimizing the structural layout in the non-display area NA.

[0150] It should be noted that the above exemplary embodiment illustrates the situation where the first control circuit 20 and the second control circuit 30 are both located in the touch display panel, and in other optional embodiments of the present invention, the first control circuit 20 and / or the second control circuit 30 may also be both located in the flexible circuit board or the driver chip. The specific design can be based on actual needs, and the embodiment of the present invention does not specifically limit this.

[0151] As a feasible embodiment, the non-display area NA further includes a driver chip setting area NA1 ; the driver chip setting area NA1 is used to set the driver chip; and the second control circuit 30 is integrated in the driver chip.

[0152] Specifically, the control switch 301 in the second control circuit 30 can be integrated in the driver chip, the common signal line 50 and the switch control line 60 are located in the touch display panel, and the common signal line 50 and the switch control line 60 are electrically connected to the control switch 301 in the driver chip through corresponding terminals. Integrating the second control circuit 30 in the driver chip can reduce the space occupied in the touch display panel and leave more space for other wiring structures.

[0153] The touch display panel provided in the embodiment of the present invention may further include any structure known to those skilled in the art, which will not be elaborated or limited in the embodiment of the present invention.

[0154] Based on the same inventive concept, an embodiment of the present invention further provides a touch display device. Fig. 20 FIG. 1 is a schematic diagram of a touch display device provided by an embodiment of the present invention. Fig. 20 As shown, the touch display device includes the touch display panel 1000 provided by any embodiment of the present invention. Therefore, the touch display device provided by the embodiment of the present invention has the corresponding beneficial effects of the touch display panel provided by the embodiment of the present invention, which will not be repeated here. Exemplarily, the touch display device can be an electronic device such as a mobile phone, a computer, a smart wearable device (for example, a smart watch), and a car display device, which is not limited by the embodiment of the present invention.

[0155] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A touch display panel, characterized in that: include: a display area and a non-display area surrounding the display area; The display area includes a plurality of touch electrodes arranged in an array; M adjacent touch electrodes constitute a touch electrode group; M is a positive integer greater than or equal to 2; The non-display area includes a first control circuit, a second control circuit, a plurality of gate control lines, a plurality of common signal lines, a plurality of switch control lines, and a plurality of touch fan-out lines; The first control circuit includes a plurality of multi-way selection circuits; the multi-way selection circuit includes a plurality of selection switches; in the same multi-way selection circuit, the control end of each selection switch is electrically connected to a different selection control line, the first end of each selection switch is electrically connected to the same touch fan-out line, and the second end of each selection switch is electrically connected to the corresponding touch electrodes in the same touch electrode group; The second control circuit includes multiple control switches; the control end of the control switch is electrically connected to the switch control line, the input end of the control switch is electrically connected to the common signal line, and the output end of the control switch is electrically connected to the touch electrodes accordingly; wherein the control switches electrically connected to the touch electrodes that are adjacent and belong to different touch electrode groups are respectively electrically connected to different common signal lines and different switch control lines.

2. The touch display panel according to claim 1, characterized in that: Among the touch electrodes in the same row, the control switch electrically connected to the touch electrodes in the same touch electrode group is electrically connected to the same switch control line and the same common signal line; and / or, Among the touch electrodes in the same column, the control switch electrically connected to the touch electrodes in the same touch electrode group is electrically connected to the same switch control line and the same common signal line.

3. The touch display panel according to claim 2, characterized in that: In the touch electrodes located in the same column, the gate switches electrically connected to two adjacent touch electrodes belonging to different touch electrode groups are electrically connected to different gate control lines respectively.

4. The touch display panel according to claim 1, characterized in that: The control switches electrically connected to the touch electrodes that are adjacent and belong to the same touch electrode group are electrically connected to different common signal lines, respectively.

5. The touch display panel according to claim 4, characterized in that: The control switches electrically connected to the touch electrodes that are adjacent and belong to the same touch electrode group are electrically connected to different switch control lines, respectively.

6. The touch display panel according to claim 4, characterized in that: The two adjacent touch electrode groups are respectively a first type of touch electrode group and a second type of touch electrode group; there is a first touch electrode in the first type of touch electrode group, and there is a second touch electrode in the second type of touch electrode group; The control switch corresponding to the first touch electrode and the control switch corresponding to the second touch electrode are electrically connected to different common signal lines; The gate switch corresponding to the first touch electrode and the gate switch corresponding to the second touch electrode are electrically connected to the same gate control line.

7. The touch display panel according to claim 1, characterized in that: Each of the multiplexing circuits electrically connected to the touch electrode groups in the same column forms a multiplexing circuit group; in the same multiplexing circuit group, the multiplexing circuit electrically connected to the touch electrode group in the i-th row is the i-th multiplexing circuit; when the number of touch electrode groups in the same column is N, 1 ≤ i ≤ N, and both i and N are positive integers; Along the row direction of the touch electrodes, the touch fan-out lines are arranged in sequence; adjacent N touch fan-out lines form a touch fan-out line group; each touch fan-out line in the same touch fan-out line group is electrically connected to each multiplexing circuit in the same multiplexing circuit group; Among them, two adjacent touch fan-out lines belonging to different touch fan-out line groups are electrically connected to the s-th multiplexing circuit and the k-th multiplexing circuit respectively; where 1 ≤ s ≤ N, 1 ≤ k ≤ N, and both s and k are even numbers, or both s and k are odd numbers.

8. The touch display panel according to claim 7, wherein When N is an even number, in the multiplexing circuit group corresponding to the touch electrode group in the j-th column, the m-th multiplexing circuit is electrically connected to the touch fan-out line with the arrangement serial number m + 1 in the j-th touch fan-out line group, and the (m + 1)-th multiplexing circuit is electrically connected to the touch fan-out line with the arrangement serial number m in the j-th touch fan-out line group; where 1 ≤ m ≤ N, and m is an odd number, and j is an even number; When N is an odd number, in the multiplexing circuit group corresponding to the touch electrode group in the j-th column, the m-th multiplexing circuit is electrically connected to the touch fan-out line with the arrangement serial number m + 1 in the j-th touch fan-out line group, and the (m + 1)-th multiplexing circuit is electrically connected to the touch fan-out line with the arrangement serial number m in the j-th touch fan-out line group; where 1 ≤ m < N, and m is an odd number, and j is a positive integer greater than 1.

9. The touch display panel according to claim 8, characterized in that: The non-display area further includes a plurality of first connection lines and a plurality of second connection lines that are insulated from each other; The m-th multiplexing circuit is electrically connected to the touch fan-out line through the first connection line; The (m + 1)-th multiplexing circuit is electrically connected to the touch fan-out line through the second connection line; The touch display panel includes a first conductive layer and a second conductive layer with insulation therebetween; the first conductive layer includes the first connection lines, and the second conductive layer includes the second connection lines.

10. The touch display panel according to claim 9, characterized in that: One of the first conductive layer and the second conductive layer further includes each touch fan-out line.

11. The touch display panel according to claim 9, wherein The first conductive layer further includes the touch fan-out lines electrically connected to the first connection lines; and / or, The second conductive layer further includes the touch fan-out lines electrically connected to the second connection lines.

12. The touch display panel according to claim 1, characterized in that: The first control circuit and the second control circuit are respectively arranged on opposite sides of the display area.

13. The touch display panel according to claim 12, characterized in that: The display area further includes a plurality of touch traces; each touch trace is electrically connected to each touch electrode in one-to-one correspondence; One end of the touch trace is electrically connected to the control switch, and the other end of the touch trace is electrically connected to the strobe switch.

14. The touch display panel according to claim 1, characterized in that: The touch electrodes of the same touch electrode group are electrically connected to the same control switch.

15. The touch display panel according to claim 14, characterized in that: The first control circuit and the second control circuit are arranged on the same side of the display area.

16. The touch display panel according to claim 15, characterized in that: The output end of the control switch is electrically connected to the touch electrode through the touch fan-out line and the multi-way selection circuit in sequence.

17. The touch display panel according to claim 16, characterized in that: The non-display area further includes a driver chip setting area; the driver chip setting area is provided with a plurality of touch terminals; each of the touch terminals is electrically connected to each of the touch fan-out lines; The control switch is electrically connected to the touch fan-out line through the touch terminal.

18. The touch display panel according to claim 1, characterized in that: The non-display area also includes a driver chip setting area; the driver chip setting area is used to set a driver chip; and the second control circuit is integrated in the driver chip.

19. The touch display panel according to claim 1, characterized in that: The touch display panel includes a touch short circuit detection stage; in the touch short circuit detection stage, each of the common signal lines transmits a different common signal.

20. A touch display device, characterized in that: include: The touch display panel according to any one of claims 1 to 19.

Images