A touch display device and control method thereof

Abstract

The present invention discloses a touch display device and a control method thereof. The touch display device includes a display panel, a touch panel, a multi-way selection circuit and a touch drive circuit. The multi-way selection circuit includes at least two multi-way selection sub-circuits. The multi-way selection sub-circuits are used to time-share conduct the second touch signal transmission terminal with different first touch signal transmission terminals according to the control signal received by the control signal terminal; the touch drive electrode is electrically connected to the corresponding touch drive signal pin through the multi-way selection circuit; and / or the touch sensing electrode is electrically connected to the corresponding touch sensing signal pin through the multi-way selection circuit. The touch display device and the control method thereof provided by the embodiment of the present invention can make at least two touch drive electrodes time-share multiplex one touch drive signal pin, and / or make at least two touch sensing electrodes time-share multiplex one touch sensing signal pin, thereby reducing the number of pins of the touch drive circuit and reducing the cost.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a touch display device and a control method thereof. Background Art

[0002] At present, touch screen display panels have become the mainstream configuration of mobile display terminals, among which capacitive touch screens (CTP) have absolute advantages in many aspects.

[0003] Existing capacitive touch screens usually use touch drive electrodes and touch sensing electrodes to form mutual capacitance, and detect the touch point by measuring the change in the amount of charge in the mutual capacitance when touching. In the process of touch detection, it is necessary to send a touch drive signal to the touch drive electrode through the touch drive IC set on the touch display panel, and receive the touch sensing signal transmitted by the touch detection electrode to determine whether there is a touch point.

[0004] Among them, in the existing capacitive touch screen, the touch driving electrodes and the touch sensing electrodes are electrically connected to the pins of the touch driving IC in a one-to-one correspondence. Since the number of touch driving electrodes and touch sensing electrodes is large, the touch driving IC is required to have more pins, which makes the cost of the touch driving IC high. Especially for large-sized capacitive touch screens, the design of the touch driving IC greatly increases the cost of the capacitive touch screen. Summary of the invention

[0005] The invention provides a touch display device and a control method thereof to reduce costs.

[0006] According to one aspect of the present invention, there is provided a touch display device, comprising:

[0007] Display panel;

[0008] A touch panel located at the light-emitting side of the display panel; the touch panel comprises a first substrate, a side of the first substrate away from the display panel is provided with a plurality of touch driving electrodes and a plurality of touch sensing electrodes; the touch driving electrodes are arranged along a first direction and extend along a second direction; the touch sensing electrodes are arranged along the second direction and extend along the first direction, wherein the first direction and the second direction are both parallel to the plane where the display panel is located, and the first direction intersects with the second direction;

[0009] a multi-way selection circuit, the multi-way selection circuit being located on the display panel; the multi-way selection circuit comprising at least two multi-way selection sub-circuits, each of the multi-way selection sub-circuits comprising at least two first touch signal transmission terminals, a control signal terminal and one second touch signal transmission terminal; the multi-way selection sub-circuit being used for time-sharingly conducting the second touch signal transmission terminal with different first touch signal transmission terminals according to a control signal received by the control signal terminal;

[0010] A touch driving circuit, the touch driving circuit comprising a plurality of touch driving signal pins, a plurality of touch sensing signal pins and at least two control signal pins; the touch driving signal pins are used to output touch driving signals to the corresponding touch driving electrodes, the touch sensing signal pins are used to receive touch sensing signals from the corresponding touch sensing electrodes, and the control signal pins are used to output the control signals to the control signal terminals;

[0011] The touch driving electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch driving signal pins;

[0012] and / or,

[0013] The touch sensing electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch sensing signal pins.

[0014] According to another aspect of the present invention, a control method for a touch display device is provided, which is used for the touch display device according to the first aspect; wherein the touch drive electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch drive signal pins;

[0015] The control method comprises:

[0016] outputting the control signal to the control signal terminal so that the second touch signal transmission terminal is turned on with different first touch signal transmission terminals in a time-sharing manner;

[0017] The touch driving electrodes are controlled to receive the touch driving signals through the touch driving signal pins in a time-sharing manner.

[0018] According to another aspect of the present invention, a control method for a touch display device is provided, which is used for the touch display device according to the first aspect; wherein the touch sensing electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch sensing signal pins;

[0019] The control method comprises:

[0020] outputting the control signal to the control signal terminal so that the second touch signal transmission terminal is turned on with different first touch signal transmission terminals in a time-sharing manner;

[0021] The touch sensing signal pin is controlled to receive the touch sensing signal through the touch sensing electrode in a time-sharing manner.

[0022] According to another aspect of the present invention, a control method for a touch display device is provided, which is used for the touch display device according to the first aspect; wherein the touch driving electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch driving signal pins; the touch sensing electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch sensing signal pins;

[0023] The control method comprises:

[0024] outputting the control signal to the control signal terminal so that the second touch signal transmission terminal is turned on with different first touch signal transmission terminals in a time-sharing manner;

[0025] The touch sensing signal pin is controlled to receive the touch sensing signal through the touch sensing electrode in a time-sharing manner, and the touch driving electrode is controlled to receive the touch driving signal through the touch driving signal pin in a time-sharing manner.

[0026] The touch display device and control method thereof provided by the embodiments of the present invention are provided with a multi-way selection circuit including at least two multi-way selection sub-circuits on the display panel, and the multi-way selection sub-circuits are provided to time-share conduct the second touch signal transmission terminal with different first touch signal transmission terminals according to the control signal received by the control signal terminal, and the touch driving electrodes of the touch panel are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch driving signal pins on the touch driving circuit, and / or the touch sensing electrodes of the touch panel are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch sensing signal pins on the touch driving circuit, so that at least two touch driving electrodes time-share multiplex one touch driving signal pin, and / or at least two touch sensing electrodes time-share multiplex one touch sensing signal pin, thereby reducing the number of signal pins of the touch driving circuit, reducing the cost of the touch driving circuit, and further reducing the cost of the touch display device, thereby improving the product competitiveness.

[0027] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic structural diagram of a touch display device provided by an embodiment of the present invention;

[0030] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the A-A' direction;

[0031] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the B-B' direction;

[0032] Figure 4 A schematic diagram of the structure of a multi-way selection circuit provided by an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of the structure of a touch driving circuit provided by an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of a partial cross-sectional structure of a touch panel provided by an embodiment of the present invention;

[0035] Figure 7 A schematic structural diagram of another touch display device provided by an embodiment of the present invention;

[0036] Figure 8 A schematic diagram of a connection structure of a touch display device provided by an embodiment of the present invention;

[0037] Fig. 9 A schematic diagram of the connection structure of another touch display device provided by an embodiment of the present invention;

[0038] Fig.10 A schematic diagram of a connection structure of another touch display device provided by an embodiment of the present invention;

[0039] Fig.11 A schematic diagram of a connection structure of another touch display device provided by an embodiment of the present invention;

[0040] Fig.12A schematic diagram of a connection structure of another touch display device provided by an embodiment of the present invention;

[0041] Fig.13 A schematic diagram of the structure of another multi-way selection circuit provided by an embodiment of the present invention;

[0042] Fig.14 A schematic diagram of a control timing of a touch display device provided by an embodiment of the present invention;

[0043] Fig.15 A schematic diagram of control timing of another touch display device provided by an embodiment of the present invention;

[0044] Fig.16 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0045] Fig.17 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0046] Fig.18 A schematic flow chart of a control method of a touch display device provided by an embodiment of the present invention;

[0047] Fig.19 A schematic flow chart of another method for controlling a touch display device provided by an embodiment of the present invention;

[0048] Fig. 20 A schematic flow chart of another method for controlling a touch display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the scheme 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. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] Figure 1 A structural diagram of a touch display device provided by an embodiment of the present invention is shown in FIG. Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the A-A' direction, Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the B-B' direction, Figure 4 A schematic diagram of a multi-way selection circuit provided by an embodiment of the present invention is provided. Figure 5 A structural diagram of a touch driving circuit provided by an embodiment of the present invention is shown in FIG. Figure 1-Figure 5As shown, the touch display device provided by the embodiment of the present invention includes a display panel 10, a touch panel 11, a multi-way selection circuit 12 and a touch driving circuit 13. The touch panel 11 is located at the light emitting side of the display panel 10, and the touch panel 11 includes a first substrate 111. A plurality of touch driving electrodes 112 and a plurality of touch sensing electrodes 113 are arranged on a side of the first substrate 111 away from the display panel 10. The touch driving electrodes 112 are arranged along a first direction X and extend along a second direction Y; the touch sensing electrodes 113 are arranged along a second direction Y and extend along the first direction X, wherein both the first direction X and the second direction Y are parallel to the plane where the display panel 10 is located, and the first direction X intersects with the second direction Y. The multiplexer circuit 12 is located on the display panel 10. The multiplexer circuit 12 includes at least two multiplexer sub-circuits 121. Each multiplexer sub-circuit 121 includes at least two first touch signal transmission terminals 21, a control signal terminal 22, and a second touch signal transmission terminal 23. The multiplexer sub-circuit 121 is used to conduct the second touch signal transmission terminal 23 with different first touch signal transmission terminals 21 in a time-sharing manner according to the control signal received by the control signal terminal 22. The touch drive circuit 13 includes a plurality of touch drive signal pins 131, a plurality of touch sensing signal pins 132, and at least two control signal pins 133. The touch drive signal pins 131 are used to output touch drive signals to corresponding touch drive electrodes 112. The touch sensing signal pins 132 are used to receive touch sensing signals from corresponding touch sensing electrodes 113. The control signal pins 133 are used to output control signals to the control signal terminals 22. The touch driving electrodes 112 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, and the second touch signal transmission terminals 23 are electrically connected to the corresponding touch driving signal pins 131; and / or, the touch sensing electrodes 113 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, and the second touch signal transmission terminals 23 are electrically connected to the corresponding touch sensing signal pins 132.

[0052] The touch display device provided in the embodiment of the present invention can be a mobile phone or any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiment of the present invention does not make any special limitations on this.

[0053] Among them, the touch display device can adopt a capacitive touch screen (CTP). The capacitive touch screen uses the current induction of the human body to control the screen. The touch position is calculated according to the capacitance change of the detected touch area. It has the advantages of high sensitivity and easy multi-touch. It has gradually become the first choice for electronic products such as smart phones and tablets, but it is not limited to this.

[0054] Furthermore, the touch display device includes a display panel 10, which is used to realize a display function. The display panel 10 can be a liquid crystal display panel (Liquid Crystal Display pane1, LCD), an organic light-emitting display panel (Organic Light-Emitting Diode, OLED), a micro light-emitting diode display panel (Micro Light Emitting Diode, Micro LED) or a sub-millimeter light-emitting diode display panel (Mini Light Emitting Diode, Mini LED), but is not limited to this.

[0055] Continue to refer Figure 1 and Figure 2 A touch panel 11 is disposed on the light-emitting side of the display panel 10. The touch panel 11 may adopt an external touch system, that is, the touch panel 11 may be directly attached to the light-emitting side of the display panel 10. Specifically, Figure 1 and Figure 2 As shown, the touch panel 11 includes a first substrate 111 and a plurality of touch driving electrodes 112 and a plurality of touch sensing electrodes 113 located on a side of the first substrate 111 away from the display panel 10. The plurality of touch driving electrodes 112 and the plurality of touch sensing electrodes 113 are arranged crosswise. Figure 2 As shown, the touch driving electrodes 112 and the touch sensing electrodes 113 may be arranged in different layers, and a first insulating layer 114 is arranged between the touch driving electrodes 112 and the touch sensing electrodes 113 to insulate the touch driving electrodes 112 from the touch sensing electrodes 113 .

[0056] Figure 6 A partial cross-sectional structural diagram of a touch panel provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, the touch driving electrodes 112 and the touch sensing electrodes 113 may also be arranged in the same layer. Since the touch driving electrodes 112 and the touch sensing electrodes 113 are arranged crosswise, in order to insulate the touch driving electrodes 112 and the touch sensing electrodes 113, a bridge metal layer 115 and a first insulating layer 114 may be sequentially arranged on one side of the first substrate 111 close to the touch driving electrodes 112 and the touch sensing electrodes 113. One of the touch driving electrodes 112 and the touch sensing electrodes 113 is connected via the bridge metal layer 115. Figure 6 It is taken as an example that the touch driving electrodes 112 are connected via the bridge metal layer 115 , but the present invention is not limited thereto.

[0057] Continue to refer Figure 1 , Figure 3 and Figure 4A multi-way selection circuit 12 is provided on the display panel 10, and the multi-way selection circuit 12 includes at least two multi-way selection sub-circuits 121. Each multi-way selection sub-circuit 121 includes at least two first touch signal transmission terminals 21, a control signal terminal 22 and a second touch signal transmission terminal 23. When a control signal is applied to the control signal terminal 22, the multi-way selection sub-circuit 121 connects the second touch signal transmission terminal 23 with a corresponding first touch signal transmission terminal 21 according to the control signal, while other first touch signal transmission terminals 21 are disconnected from the second touch signal transmission terminal 23. Therefore, in a multi-way selection sub-circuit 121, by applying different control signals to the control signal terminal 22, the second touch signal transmission terminal 23 can be controlled to be connected with different first touch signal transmission terminals 21 in a time-sharing manner.

[0058] For example, Figure 4 As shown, taking a multi-way selection sub-circuit 121 including two first touch signal transmission terminals 21 and one second touch signal transmission terminal 23 as an example, the two first touch signal transmission terminals 21 are connected to the second touch signal transmission terminal 23 in a time-sharing manner, so that signals can be transmitted to the two first touch signal transmission terminals 21 in a time-sharing manner through one second touch signal transmission terminal 23, so that one signal channel can be decomposed into two signal channels.

[0059] Among them, the multiplexer selection circuit 12 is disposed on the display panel 10, and the multiplexer selection circuit 12 and the pixel driving circuit in the display panel 10 can be manufactured in the same process, thereby reducing the difficulty of manufacturing the multiplexer selection circuit 12 and facilitating its implementation.

[0060] Continue to refer Figure 1 , Figure 3 and Figure 5 The touch display device also includes a touch driving circuit 13, and a touch driving signal pin 131 of the touch driving circuit 13 is connected to the touch driving electrode 112 to output a touch driving signal to the touch driving electrode 112; a touch sensing signal pin 132 of the touch driving circuit 13 is connected to the corresponding touch sensing electrode 113 to receive the touch sensing signal of the touch sensing electrode 113, so as to determine whether there is a touch point according to the touch sensing signal. The touch driving circuit 13 is also provided with a control signal pin 133, and the control signal pin 133 is electrically connected to the corresponding control signal terminal 22 to output a control signal to the control signal terminal 22, so as to control the second touch signal transmission terminal 23 of the multi-way selection subcircuit 121 to be time-sharingly turned on with different first touch signal transmission terminals 21.

[0061] Furthermore, if Figure 1-Figure 5As shown, the touch drive electrodes 112 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, and the second touch signal transmission terminals 23 are electrically connected to the corresponding touch drive signal pins 131, so as to output the touch drive signal to at least two touch drive electrodes 112 in a time-sharing manner through one touch drive signal pin 131, that is, at least two touch drive electrodes 112 can time-sharingly reuse one touch drive signal pin 131, thereby reducing the number of touch drive signal pins 131 of the touch drive circuit 13, which helps to reduce the cost of the touch drive circuit 13.

[0062] Figure 7 A structural diagram of another touch display device provided by an embodiment of the present invention is shown in FIG. Figure 7 As shown, optionally, the touch sensing electrodes 113 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, and the second touch signal transmission terminals 23 are electrically connected to the corresponding touch sensing signal pins 132, so as to receive touch sensing signals of at least two touch sensing electrodes 113 through one touch sensing signal pin 132 in a time-sharing manner, that is, at least two touch sensing electrodes 113 can time-sharingly multiplex one touch sensing signal pin 132, thereby reducing the number of touch sensing signal pins 132 of the touch driving circuit 13, which helps to reduce the cost of the touch driving circuit 13.

[0063] In summary, the touch display device provided by the embodiment of the present invention is provided with a multi-way selection circuit 12 including at least two multi-way selection sub-circuits 121 on the display panel 10, and the multi-way selection sub-circuit 121 is provided to time-share conduct the second touch signal transmission terminal 23 with different first touch signal transmission terminals 21 according to the control signal received by the control signal terminal 22, and the touch driving electrodes 112 of the touch panel 11 are electrically connected with the first touch signal transmission terminals 21 in a one-to-one correspondence, and the second touch signal transmission terminals 23 are electrically connected with the corresponding touch driving signal pins 131 on the touch driving circuit 13, and / or Alternatively, the touch sensing electrodes 113 of the touch panel 11 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, and the second touch signal transmission terminals 23 are electrically connected to the corresponding touch sensing signal pins 132 on the touch driving circuit 13, so that at least two touch driving electrodes 112 time-share one touch driving signal pin 131, and / or at least two touch sensing electrodes 113 time-share one touch sensing signal pin 132, thereby reducing the number of signal pins of the touch driving circuit 13, reducing the cost of the touch driving circuit 13, and further reducing the cost of the touch display device, thereby improving product competitiveness.

[0064] Figure 8 A schematic diagram of a connection structure of a touch display device provided by an embodiment of the present invention is shown in FIG. Figure 8As shown, optionally, the touch driving electrodes 112 are electrically connected to the first touch signal transmission terminals 21 in one-to-one correspondence, and the second touch signal transmission terminals 23 are electrically connected to the corresponding touch driving signal pins 131. The touch driving electrodes 112 are divided into N types of touch driving electrodes 112, where N is a positive integer greater than 1; the multi-way selection subcircuit 121 includes N first touch signal transmission terminals 21, and different first touch signal transmission terminals 21 of the same multi-way selection subcircuit 121 are electrically connected to different types of touch driving electrodes 112 respectively; the N types of touch driving electrodes 112 are arranged in sequence along the first direction X, or the N types of touch driving electrodes 112 are arranged alternately along the first direction X.

[0065] Specifically, the touch drive electrodes 112 are divided into N types of touch drive electrodes 112, and the N first touch signal transmission terminals 21 of the same multi-way selection sub-circuit 121 are respectively connected to the N types of touch drive electrodes 112, and the second touch signal transmission terminal 23 is electrically connected to the corresponding touch drive signal pin 131, that is, the N types of touch drive electrodes 112 receive the touch drive signal of the touch drive signal pin 131 in a time-sharing manner, so that the N touch drive electrodes 112 can time-sharingly reuse one touch drive signal pin 131, thereby reducing the number of touch drive signal pins 131 of the touch drive circuit 13, which helps to reduce the cost of the touch drive circuit 13.

[0066] The N-type touch driving electrodes 112 may be arranged in sequence along the first direction X. For example, Figure 8 As shown, taking N=2 as an example, 8 columns of touch driving electrodes 112 are divided into first-type touch driving electrodes 31 and second-type touch driving electrodes 32, and the first-type touch driving electrodes 31 and the second-type touch driving electrodes 32 are arranged in sequence along the first direction X, that is, the first 4 columns of touch driving electrodes 112 are first-type touch driving electrodes 31, and the last 4 columns of touch driving electrodes 112 are second-type touch driving electrodes 32. The two first touch signal transmission terminals 21 of the same multiplex selection subcircuit 121 are electrically connected to one touch driving electrode 112 in the first-type touch driving electrodes 31 and one touch driving electrode 112 in the second-type touch driving electrodes 32, respectively; and a plurality of the first-type touch driving electrodes 31 ( Figure 8 The touch driving electrodes 112 are respectively electrically connected to the first touch signal transmission terminals 21 of different multi-way selection sub-circuits 121, and the plurality of the second type of touch driving electrodes 32 ( Figure 8The touch drive electrodes 112 (taking 4 as an example) are respectively electrically connected to the first touch signal transmission terminals 21 of different multiplexing sub-circuits 121. Such an arrangement enables the first type of touch drive electrodes 31 and the second type of touch drive electrodes 32 to receive the touch drive signal in a time-sharing manner, that is, at a first moment, the touch drive signal pin 131 of the touch drive circuit 13 outputs a touch drive signal to the first type of touch drive electrodes 31 (the first 4 columns of touch drive electrodes 112), and at a second moment, the touch drive signal pin 131 of the touch drive circuit 13 outputs a touch drive signal to the second type of touch drive electrodes 32 (the last four columns of touch drive electrodes 112), so that the first type of touch drive electrodes 31 and the second type of touch drive electrodes 32 can time-share the touch drive signal pin 131, thereby reducing the number of touch drive signal pins 131 in the touch drive circuit 13, which helps to reduce the cost of the touch drive circuit 13.

[0067] Fig. 9 A schematic diagram of a connection structure of another touch display device provided by an embodiment of the present invention is shown in FIG. Fig. 9 As shown, optionally, the N types of touch driving electrodes 112 are arranged alternately along the first direction X.

[0068] For example, Fig. 9 As shown, taking N=2 as an example, the odd-numbered touch driving electrodes 112 in the 8 columns of touch driving electrodes 112 are the first type of touch driving electrodes 31, and the even-numbered touch driving electrodes 112 are the second type of touch driving electrodes 32, that is, the first type of touch driving electrodes 31 and the second type of touch driving electrodes 32 are alternately arranged along the first direction X. The two first touch signal transmission terminals 21 of the same multiplexer selection subcircuit 121 are electrically connected to one odd-numbered touch driving electrode 112 and one even-numbered touch driving electrode 112, respectively; and the odd-numbered touch driving electrodes 112 are connected to the touch driving electrodes 112 of the first and second touch driving electrodes 112 of the second and third touch driving electrodes 112 of the second and third touch driving electrodes 112 of the third and third touch driving electrodes 112 of the fourth and third touch driving electrodes 112 of the fifth ... Fig. 9 The touch driving electrodes 112 are respectively electrically connected to the first touch signal transmission terminals 21 of different multi-way selection sub-circuits 121, and the multiple (even-numbered columns) Fig. 9The touch driving electrodes 112 (taking 4 as an example) are respectively electrically connected to the first touch signal transmission terminals 21 of different multiplex selection sub-circuits 121. In this way, the touch driving electrodes 112 in odd columns (the first type of touch driving electrodes 31) and the touch driving electrodes 112 in even columns (the second type of touch driving electrodes 32) can receive the touch driving signal in a time-sharing manner. That is, at the first moment, the touch driving signal pins 131 of the touch driving circuit 13 send the touch driving signal to the touch driving electrodes 112 in odd columns (the first type of touch driving electrodes 31). At the second moment, the touch drive signal pin 131 of the touch drive circuit 13 outputs the touch drive signal to the touch drive electrodes 112 in the even columns (the second type of touch drive electrodes 32), so that the touch drive electrodes 112 in the odd columns and the touch drive electrodes 112 in the even columns can time-share the touch drive signal pin 131, thereby reducing the number of touch drive signal pins 131 in the touch drive circuit 13, which helps to reduce the cost of the touch drive circuit 13.

[0069] It should be noted that Figure 8 and Fig. 9 Taking N=2 as an example, in other embodiments, N may also be any positive integer greater than 1, such as 3, 4, 5 or 6. It can be understood that, the larger the value of N is, the more touch drive electrodes 112 can time-share one touch drive signal pin 131, thereby further reducing the number of touch drive signal pins 131 of the touch drive circuit 13, which helps to reduce the cost of the touch drive circuit 13; but if the value of N is too large, the scanning time of the touch drive electrode 112 will be longer, which is not conducive to the real-time detection of touch points. Those skilled in the art can set the value of N according to actual needs.

[0070] Meanwhile, the arrangement of the N-type touch driving electrodes 112 is not limited to the above embodiments, and those skilled in the art may make arrangements according to actual requirements.

[0071] also, Figure 8 and Fig. 9 The example in which the touch driving electrodes 112 extend along the column direction is taken only, but the invention is not limited thereto. The touch driving electrodes 112 may also extend along the row direction or along other directions, which is not limited in the embodiment of the invention.

[0072] Fig.10 A schematic diagram of a connection structure of another touch display device provided by an embodiment of the present invention is shown in FIG. Fig.10As shown, optionally, the touch sensing electrodes 113 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, the second touch signal transmission terminals 23 are electrically connected to the corresponding touch sensing signal pins 132, and the touch sensing electrodes 113 are divided into M types of touch sensing electrodes 113, where M is a positive integer greater than 1; the multi-way selection subcircuit 121 includes M first touch signal transmission terminals 21, and different first touch signal transmission terminals 21 of the same multi-way selection subcircuit 121 are electrically connected to different types of touch sensing electrodes 113, respectively; the M types of touch sensing electrodes 113 are arranged in sequence along the second direction Y, or the M types of touch sensing electrodes 113 are arranged alternately along the second direction Y.

[0073] Specifically, the touch sensing electrodes 11 are divided into M types of touch sensing electrodes 113, and the N first touch signal transmission terminals 21 of the same multiplexer selection subcircuit 121 are respectively connected to the M types of touch sensing electrodes 113, and the second touch signal transmission terminal 23 is electrically connected to the corresponding touch sensing signal pin 132, that is, the touch sensing signal pin 132 receives the touch sensing signal of the M types of touch sensing electrodes 113 in a time-sharing manner, so that the M touch sensing electrodes 113 can time-sharingly reuse one touch sensing signal pin 132, thereby reducing the number of touch sensing signal pins 132 of the touch driving circuit 13, which helps to reduce the cost of the touch driving circuit 13.

[0074] The M-type touch sensing electrodes 113 may be arranged in sequence along the second direction Y. For example, Fig.10 As shown, taking M=2 as an example, 8 columns of touch sensing electrodes 113 are divided into first-type touch sensing electrodes 33 and second-type touch sensing electrodes 34, and the first-type touch sensing electrodes 33 and the second-type touch sensing electrodes 34 are arranged in sequence along the second direction Y, that is, the first 4 columns of touch sensing electrodes 113 are first-type touch sensing electrodes 33, and the last 4 columns of touch sensing electrodes 113 are second-type touch sensing electrodes 34. The two first touch signal transmission terminals 21 of the same multiplexer selection subcircuit 121 are electrically connected to one touch sensing electrode 113 of the first-type touch sensing electrodes 33 and one touch sensing electrode 113 of the second-type touch sensing electrodes 34, respectively; and a plurality of the first-type touch sensing electrodes 33 ( Fig.10 The touch sensing electrodes 113 are respectively electrically connected to the first touch signal transmission terminals 21 of different multi-channel selection sub-circuits 121, and the plurality of the second type of touch sensing electrodes 34 ( Fig.10The touch sensing electrodes 113 (taking 4 as an example) are electrically connected to the first touch signal transmission terminals 21 of different multiplexer selection sub-circuits 121, respectively. With such an arrangement, the touch sensing signal pins 132 can receive the touch sensing signals of the first type of touch sensing electrodes 33 and the second type of touch sensing electrodes 34 in a time-sharing manner, that is, at a first moment, the touch sensing signal pins 132 of the touch driving circuit 13 receive the touch sensing signals of the first type of touch sensing electrodes 33 (the first 4 columns of touch sensing electrodes 113), and at a second moment, the touch sensing signal pins 132 of the touch driving circuit 13 receive the touch sensing signals of the second type of touch sensing electrodes 34 (the last four columns of touch sensing electrodes 113), so that the first type of touch sensing electrodes 33 and the second type of touch sensing electrodes 34 can time-sharingly multiplex the touch sensing signal pins 132, thereby reducing the number of touch sensing signal pins 132 in the touch driving circuit 13, which helps to reduce the cost of the touch driving circuit 13.

[0075] Fig.11 A schematic diagram of a connection structure of another touch display device provided by an embodiment of the present invention is shown in FIG. Fig.11 As shown, optionally, the M-type touch sensing electrodes 113 are arranged alternately along the second direction Y.

[0076] For example, Fig.11 As shown, taking M=2 as an example, the touch sensing electrodes 113 in the odd columns of the 8 columns of touch sensing electrodes 113 are the first type of touch sensing electrodes 33, and the touch sensing electrodes 113 in the even columns are the second type of touch sensing electrodes 34, that is, the first type of touch sensing electrodes 33 and the second type of touch sensing electrodes 34 are alternately arranged along the second direction Y. The two first touch signal transmission terminals 21 of the same multiplexer selection subcircuit 121 are electrically connected to one touch sensing electrode 113 in an odd column and one touch sensing electrode 113 in an even column, respectively; and the odd columns of the multiple ( Fig.11 The touch sensing electrodes 113 are respectively electrically connected to the first touch signal transmission terminals 21 of different multi-way selection sub-circuits 121, and the multiple (even-numbered columns) Fig.11The touch sensing electrodes 113 (taking 4 as an example) are respectively electrically connected to the first touch signal transmission terminals 21 of different multiplexer selection sub-circuits 121. In this way, the touch sensing signal pins 132 can receive the touch sensing electrodes 113 (the first type of touch sensing electrodes 33) of the odd columns and the touch sensing electrodes 113 (the second type of touch sensing electrodes 34) of the even columns in time division to reach the touch sensing signal. That is, at the first moment, the touch sensing signal pins 132 of the touch driving circuit 13 receive the touch sensing electrodes 113 of the odd columns. At the second moment, the touch sensing signal pins 132 of the touch driving circuit 13 receive the touch sensing signals of the touch sensing electrodes 113 (the second type of touch sensing electrodes 34) in the even-numbered columns, so that the touch sensing electrodes 113 in the odd-numbered columns and the touch sensing electrodes 113 in the even-numbered columns can time-share the touch sensing signal pins 132, thereby reducing the number of touch sensing signal pins 132 in the touch driving circuit 13, which helps to reduce the cost of the touch driving circuit 13.

[0077] It should be noted that Fig.10 and Fig.11 Taking M=2 as an example, in other embodiments, M may also be any positive integer greater than 1, such as 3, 4, 5 or 6. It can be understood that, the larger the value of M is, the more touch sensing electrodes 113 can time-share one touch sensing signal pin 132, thereby further reducing the number of touch sensing signal pins 132 of the touch driving circuit 13, which helps to reduce the cost of the touch driving circuit 13; but if the value of M is too large, the scanning time of the touch sensing electrode 113 will be longer, which is not conducive to the real-time detection of touch points. Those skilled in the art can set the value of M according to actual needs.

[0078] Meanwhile, the arrangement of the M-type touch sensing electrodes 113 is not limited to the above embodiments, and those skilled in the art may make arrangements according to actual requirements.

[0079] also, Fig.10 and Fig.11 The example in which the touch sensing electrodes 113 extend along the column direction is taken only, but the invention is not limited thereto. The touch sensing electrodes 113 may also extend along the row direction or along other directions, which is not limited in the embodiment of the invention.

[0080] Fig.12 A schematic diagram of a connection structure of another touch display device provided by an embodiment of the present invention is shown in FIG. Fig.12As shown, optionally, the multiplexer circuit 12 includes a first multiplexer circuit 41 and a second multiplexer circuit 42, the touch drive electrodes 112 are electrically connected to the first touch signal transmission terminals 21 of the first multiplexer circuit 41 in a one-to-one correspondence, and the second touch signal transmission terminals 23 of the first multiplexer circuit 41 are electrically connected to the corresponding touch drive signal pins 131; the touch sensing electrodes 113 are electrically connected to the first touch signal transmission terminals 21 of the second multiplexer circuit 42 in a one-to-one correspondence, and the second touch signal transmission terminals 23 of the second multiplexer circuit 42 are electrically connected to the corresponding touch sensing signal pins 132.

[0081] For example, Fig.12 As shown, by setting a first multiplexer circuit 41 and a second multiplexer circuit 42, the touch drive electrodes 112 are electrically connected to the first touch signal transmission terminals 21 of the first multiplexer circuit 41 in a one-to-one correspondence, and the second touch signal transmission terminals 23 of the first multiplexer circuit 41 are electrically connected to the corresponding touch drive signal pins 131, so as to output the touch drive signal to at least two touch drive electrodes 112 in a time-sharing manner through one touch drive signal pin 131, that is, at least two touch drive electrodes 112 can time-sharingly multiplex one touch drive signal pin 131, thereby reducing the number of touch drive signal pins 131 of the touch drive circuit 13, which helps to reduce the cost of the touch drive circuit 13. At the same time, the touch sensing electrodes 113 are electrically connected to the first touch signal transmission terminals 21 of the second multiplexing circuit 42 in a one-to-one correspondence, and the second touch signal transmission terminals 23 of the second multiplexing circuit 42 are electrically connected to the corresponding touch sensing signal pins 132, so as to receive the touch sensing signals of at least two touch sensing electrodes 113 through one touch sensing signal pin 132 in a time-sharing manner, that is, at least two touch sensing electrodes 113 can time-sharingly multiplex one touch sensing signal pin 132, thereby further reducing the number of touch sensing signal pins 132 of the touch driving circuit 13, which helps to further reduce the cost of the touch driving circuit 13.

[0082] Fig.13 A schematic diagram of another multi-way selection circuit provided by an embodiment of the present invention is shown in FIG. Fig.13 As shown, optionally, the multiplexer selection subcircuit 121 includes at least two transistors 50, and the transistor 50 includes a first terminal 501, a second terminal 502, and a control terminal 503. In the same multiplexer selection subcircuit 121, the first terminal 501 of the transistor 50 serves as the first touch signal transmission terminal 21 of the multiplexer selection subcircuit 121, the second terminals 502 of different transistors 50 are electrically connected to serve as the second touch signal transmission terminal 23 of the multiplexer selection subcircuit 121, and the control terminal 503 of the transistor 50 serves as the control signal terminal 22 of the multiplexer selection subcircuit 121. Figure 8-Figure 13In the same multiplexer selection sub-circuit 121 , the control terminals 503 of different transistors 50 are electrically connected to different control signal pins 133 .

[0083] For example, Fig.13 As shown, the multi-way selection sub-circuit 121 includes at least two transistors 50, which are turned on or off in response to a control signal input to its control terminal 503. When the transistor 50 is turned on, the first terminal 501 and the second terminal 502 are connected, and when the transistor 50 is turned off, the first terminal 501 and the second terminal 502 are disconnected.

[0084] Among them, the transistor 50 can be an N-type transistor or a P-type transistor, and those skilled in the art can set it according to actual needs. In addition, the control terminal 503 of the transistor 50 can be a gate; the first terminal 501 of the transistor 50 can be a source, and the second terminal 502 can be a drain. In other embodiments, the first terminal 501 of the transistor 50 can also be a drain, and the second terminal 502 can be a source, which is not limited in the embodiment of the present invention.

[0085] Continue to refer Fig.13 In the same multiplexer selection subcircuit 121, the number of transistors 50 is the same as the first touch signal transmission terminal 21, the first end 501 of the transistor 50 serves as the first touch signal transmission terminal 21 of the multiplexer selection subcircuit 121, the second ends 502 of different transistors 50 are electrically connected to serve as the second touch signal transmission terminal 23 of the multiplexer selection subcircuit 121, and the control end 503 of the transistor 50 serves as the control signal terminal 22 of the multiplexer selection subcircuit 121. Figure 8-Figure 13 In the same multi-way selection sub-circuit 121, the control ends 503 of different transistors 50 are electrically connected to different control signal pins 133, so that the control signal pins 133 output different control signals to the control ends 503 of different transistors 50 in the same multi-way selection sub-circuit 121, thereby controlling the time-sharing conduction of different transistors 50 in the same multi-way selection sub-circuit 121, thereby realizing the time-sharing conduction of the second touch signal transmission terminal 23 and different first touch signal transmission terminals 21.

[0086] Fig.14 A control timing diagram of a touch display device provided by an embodiment of the present invention is shown in FIG. Fig.14 As shown, Figure 8 , Fig. 9 and Fig.14As shown, taking the multiplexer selection subcircuit 121 including two transistors 50, and the transistor 50 is an N-type transistor as an example, the multiplexer selection subcircuit 121 includes a first transistor 51 and a second transistor 52, the touch drive electrodes 112 are divided into a first type of touch drive electrodes 31 and a second type of touch drive electrodes 32, and the touch drive circuit 13 includes two control signal pins 133, which are a first control signal pin 53 and a second control signal pin 54. Among them, the first end 501 of the first transistor 51 in different multiplexer selection subcircuits 121 is electrically connected to the first type of touch drive electrodes 31, and the control end 503 of the first transistor 51 in different multiplexer selection subcircuits 121 is electrically connected to the first control signal pin 53; the first end 501 of the second transistor 52 in different multiplexer selection subcircuits 121 is electrically connected to the second type of touch drive electrodes 32, and the control end 503 of the second transistor 52 in different multiplexer selection subcircuits 121 is electrically connected to the second control signal pin 54. The touch sensing electrodes 113 are electrically connected to the touch sensing signal pins 132 in a one-to-one correspondence.

[0087] like Fig.14 As shown, the first control signal pin 53 and the second control signal pin 54 output high level alternately. When the first control signal pin 53 outputs high level, the first transistor 51 in each multiple selection sub-circuit 121 is turned on, and the second transistor 52 is turned off. At this time, the touch driving signal output by the touch driving signal pin 131 is transmitted to the first type of touch driving electrode 31 through the first transistor 51, and the touch sensing signal pin 132 receives the touch sensing signal sensed by the corresponding touch sensing electrode 113. When the second control signal pin 54 outputs high level, the second transistor 52 in each multiple selection sub-circuit 121 is turned on, and the first transistor 51 is turned off. At this time, the touch driving signal output by the touch driving signal pin 131 is transmitted to the second type of touch driving electrode 32 through the second transistor 52, and the touch sensing signal pin 132 receives the touch sensing signal sensed by the corresponding touch sensing electrode 113, thereby realizing the time-sharing driving of the first type of touch driving electrode 31 and the second type of touch driving electrode 32.

[0088] Fig.15 A control timing diagram of another touch display device provided by an embodiment of the present invention is shown in FIG. Fig.15 As shown, Fig.10 , Fig.11 and Fig.15As shown, taking the multiplexer selection subcircuit 121 including two transistors 50, and the transistor 50 is an N-type transistor as an example, the multiplexer selection subcircuit 121 includes a first transistor 51 and a second transistor 52, the touch sensing electrodes 113 are divided into the first type of touch sensing electrodes 33 and the second type of touch sensing electrodes 34, and the touch driving circuit 13 includes two control signal pins 133, which are the third control signal pin 55 and the fourth control signal pin 56. Among them, the first end 501 of the first transistor 51 in different multiplexer selection subcircuits 121 is electrically connected to the first type of touch sensing electrodes 33, and the control end 503 of the first transistor 51 in different multiplexer selection subcircuits 121 is electrically connected to the third control signal pin 55; the first end 501 of the second transistor 52 in different multiplexer selection subcircuits 121 is electrically connected to the second type of touch sensing electrodes 34, and the control end 503 of the second transistor 52 in different multiplexer selection subcircuits 121 is electrically connected to the fourth control signal pin 56. The touch driving electrodes 112 are electrically connected to the touch driving signal pins 131 in a one-to-one correspondence.

[0089] like Fig.15 As shown, the third control signal pin 55 and the fourth control signal pin 56 output high level alternately. When the third control signal pin 55 outputs high level, the first transistor 51 in each multiple selection sub-circuit 121 is turned on and the second transistor 52 is turned off. At this time, the touch drive signal pin 131 outputs the touch drive signal to the touch drive electrode 112, and the touch sensing signal pin 132 receives the touch sensing signal sensed by the first type of touch sensing electrode 33 through the first transistor 51. When the fourth control signal pin 56 outputs high level, the second transistor 52 in each multiple selection sub-circuit 121 is turned on and the first transistor 51 is turned off. At this time, the touch drive signal pin 131 outputs the touch drive signal to the touch drive electrode 112, and the touch sensing signal pin 132 receives the touch sensing signal sensed by the second type of touch sensing electrode 34 through the second transistor 52, thereby realizing the time-sharing scanning of the first type of touch drive electrode 31 and the second type of touch drive electrode 32.

[0090] It should be noted that, in order to clearly illustrate the connection relationship between the various structures in the touch display device, Figure 8-Figure 12 It only shows the connection relationship of each structure, and does not limit the actual position relationship of each structure.

[0091] Continue to refer Figure 1 , Figure 3 and Figure 7Optionally, the touch display device provided in the embodiment of the present invention further includes a first flexible circuit board 14 and a second flexible circuit board 15 electrically connected to the first flexible circuit board 14. The first flexible circuit board 14 is electrically connected to the touch driving electrodes 112 and the touch sensing electrodes 113 respectively, and the second flexible circuit board 15 is electrically connected to the multi-way selection circuit 12. The touch driving electrodes 112 and / or the touch sensing electrodes 113 are electrically connected to the first touch signal transmission terminal 21 through the first flexible circuit board 14 and the second flexible circuit board 15.

[0092] Among them, the Flexible Printed Circuit (FPC) is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film as a substrate, and has the characteristics of high wiring density, light weight, thin thickness and good bendability.

[0093] like Figure 1 , Figure 3 and Figure 7 As shown, the touch display device is provided with a second flexible circuit board 15, which is bound and connected to the display panel 10 and is used to provide a driving signal for the pixel driving circuit array in the display panel 10 to realize image display.

[0094] At the same time, the touch display device is also provided with a first flexible circuit board 14, which is bound and connected to the touch panel 11 and the second flexible circuit board 15 respectively, so as to connect the touch drive electrodes 112 and / or the touch sensing electrodes 113 on the touch panel 11 to the multi-way selection circuit 12 on the display panel 10, thereby realizing the electrical connection between the touch drive electrodes 112 and / or the touch sensing electrodes 113 and the first touch signal transmission terminal 21.

[0095] Optionally, the first flexible circuit board 14 and the second flexible circuit board 15 can be connected via a connector, or the first flexible circuit board 14 and the second flexible circuit board 15 can be connected by welding, but it is not limited thereto, and those skilled in the art can make settings according to actual needs.

[0096] Fig.16 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 1 , Figure 3 , Figure 7 and Fig.16As shown, optionally, the touch panel 11 includes a first binding area 60 and a plurality of first binding terminals 61 and a plurality of second binding terminals 62 located in the first binding area 60, the first binding terminals 61 are electrically connected to the touch driving electrodes 112 in a one-to-one correspondence, and the second binding terminals 62 are electrically connected to the touch sensing electrodes 113 in a one-to-one correspondence. The first flexible circuit board 14 includes a plurality of third binding terminals 63 and a plurality of fourth binding terminals 64, the third binding terminals 63 are electrically connected to the first binding terminals 61 in a one-to-one correspondence, and the fourth binding terminals 64 are electrically connected to the second binding terminals 62 in a one-to-one correspondence. The first flexible circuit board 14 also includes a plurality of fifth binding terminals 65, the fifth binding terminals 65 are electrically connected to the third binding terminals 63 and / or the fourth binding terminals 64 in a one-to-one correspondence. The second flexible circuit board 15 includes a plurality of sixth binding terminals 66, the sixth binding terminals 66 are electrically connected to the fifth binding terminals 65 in a one-to-one correspondence; the second flexible circuit board 15 also includes a plurality of seventh binding terminals 67, the seventh binding terminals 67 are electrically connected to the sixth binding terminals 66 in a one-to-one correspondence. The display panel 10 includes a display area 101 and a non-display area 102 arranged around the display area 101. The non-display area 102 includes a second binding area 70 and a plurality of eighth binding terminals 68 located in the second binding area 70. The eighth binding terminals 68 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, and the eighth binding terminals 68 are electrically connected to the seventh binding terminals 67 in a one-to-one correspondence.

[0097] Specifically, Figure 1 , Figure 3 , Figure 7 and Fig.16 As shown, the first binding area 60 of the touch panel 11 is provided with a first binding terminal 61 connected to the touch driving electrode 112 and a second binding terminal 62 connected to the touch sensing electrode 113. The third binding terminal 63 of the first flexible circuit board 14 is bound and connected to the first binding terminal 61, and the fourth binding terminal 64 of the first flexible circuit board 14 is bound and connected to the second binding terminal 62. The fifth binding terminal 65 of the first flexible circuit board 14 is electrically connected to the third binding terminal 63 and / or the fourth binding terminal 64 through the circuit in the first flexible circuit board 14. The sixth binding terminal 66 of the second flexible circuit board 15 is bound and connected to the fifth binding terminal 65, and the seventh binding terminal 67 of the second flexible circuit board 15 is electrically connected to the sixth binding terminal 66 through the circuit in the second flexible circuit board 15. An eighth binding terminal 68 is provided in the second binding area 70 of the display panel 10. The eighth binding terminal 68 is connected to the first touch signal transmission terminal 21 through a wiring on the display panel 10. The eighth binding terminal 68 is bound and connected to the seventh binding terminal 67, thereby realizing the connection between the touch driving electrode 112 and / or the touch sensing electrode 113 and the first touch signal transmission terminal 21.

[0098] Exemplarily, when the touch drive electrode 112 is electrically connected to the first touch signal transmission terminal 21 one by one, the touch drive electrode 112 can be connected to the first touch signal transmission terminal 21 in sequence through the first binding terminal 61 of the touch panel 11, the third binding terminal 63 and the fifth binding terminal 65 of the first flexible circuit board 14, the sixth binding terminal 66 and the seventh binding terminal 67 of the second flexible circuit board 15, and the eighth binding terminal 68 of the display panel 10.

[0099] In another embodiment, when the touch sensing electrodes 113 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, the touch sensing electrodes 113 can be connected to the first touch signal transmission terminals 21 in sequence through the second binding terminal 62 of the touch panel 11, the fourth binding terminal 64 and the fifth binding terminal 65 of the first flexible circuit board 14, the sixth binding terminal 66 and the seventh binding terminal 67 of the second flexible circuit board 15, and the eighth binding terminal 68 of the display panel 10.

[0100] Continue to refer Figure 3 Optionally, along a direction parallel to the plane where the display panel 10 is located, the first binding area 60 and the second binding area 70 are located on the same side of the display area 101 .

[0101] Among them, along the direction parallel to the plane where the display panel 10 is located, by locating the first binding area 60 and the second binding area 70 on the same side of the display area 101, the first flexible circuit board 14 and the second flexible circuit board 15 are bound on the same side of the display area 101, thereby facilitating the connection between the first flexible circuit board 14 and the second flexible circuit board 15, reducing the difficulty of connection and making it easy to achieve.

[0102] Continue to refer Figure 1 , Figure 7 and Fig.16 Optionally, the display panel 10 further includes a display driving circuit 103, a plurality of display signal lines 104 located in the display area 101, and a plurality of fan-out lines 105 located in the non-display area 102, the fan-out lines 105 are connected to the display signal lines 104 in a one-to-one correspondence, and the fan-out lines 105 are electrically connected to the display driving circuit 103. The multiplexer circuit 12 and the fan-out lines 105 are located on the same side of the display area 101, and there is a gap between the multiplexer circuit 12 and the fan-out lines 105 along the thickness direction of the display panel 10.

[0103] Specifically, Fig.16 As shown, the display driving circuit 103 provides a driving signal to the pixel driving circuit array in the display panel 10 through the fan-out wiring 105 and the display signal wiring 104 to realize image display. Among them, the display signal wiring 104 can be a data line, a scan line or other signal line, which is not limited in the embodiment of the present invention.

[0104] Continue to refer Fig.16 The multiplexer circuit 12 and the fan-out wiring 105 are located on the same side of the display area 101 , which helps to reduce the border width on other sides and also facilitates the binding connection between the second flexible circuit board 15 and the multiplexer circuit 12 .

[0105] Furthermore, if Fig.16 As shown, there is a gap between the multi-way selection circuit 12 and the fan-out wiring 105 along the thickness direction of the display panel 10, that is, along the thickness direction of the display panel 10, the multi-way selection circuit 12 and the fan-out wiring 105 do not overlap, which facilitates wiring and facilitates the binding connection between the second flexible circuit board 15 and the multi-way selection circuit 12, reduces the connection difficulty, and is easy to implement.

[0106] It should be noted that the above embodiment only takes the display driving circuit 103 being located on the display panel 10 as an example, but is not limited to this. In other embodiments, the display driving circuit 103 may also be arranged on the second flexible circuit board 15, or on the PCB main board of the touch display device. Those skilled in the art may make arrangements according to actual needs.

[0107] Continue to refer Fig.16 Optionally, the fan-out routing 105 includes a first fan-out routing 71 and a second fan-out routing 72, and the first fan-out routing 71 and the second fan-out routing 72 are arranged along a third direction Z. Along the third direction Z, the multiplexing circuit 12 is located between the first fan-out routing 71 and the second fan-out routing 72. The third direction Z is parallel to the plane where the display panel 10 is located, and the third direction Z is perpendicular to the direction from the display area 101 to the non-display area 102.

[0108] Among them, Fig.16 As shown, when two display driving circuits 103 arranged along the third direction Z are provided on the display panel 10, the first fan-out routing 71 is connected to one of the display driving circuits 103, and the second fan-out routing 72 is connected to the other display driving circuit 103. At this time, along the third direction Z, the multiplexer circuit 12 can be arranged between the first fan-out routing 71 and the second fan-out routing 72, so that the multiplexer circuit 12 and the fan-out routing 105 do not overlap along the thickness direction of the display panel 10, and sufficient arrangement space can be provided for the multiplexer circuit 12.

[0109] Fig.17 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.17 As shown, optionally, along a third direction Z, the multiplexing circuit 12 is located on one side of the fan-out wiring 105 , wherein the third direction Z is perpendicular to the direction from the display area 101 to the non-display area 102 .

[0110] Specifically, Fig.17 As shown, when only one display driving circuit 103 is disposed on the display panel 10, the fan-out wiring 105 is connected to the display driving circuit 103. At this time, along the third direction Z, the multiplexer circuit 12 can be disposed on one side of the fan-out wiring 105, so that the multiplexer circuit 12 and the fan-out wiring 105 do not overlap along the thickness direction of the display panel 10, and sufficient space can be provided for the multiplexer circuit 12.

[0111] Among them, Fig.17 As shown, along the third direction Z, the multi-way selection circuit 12 can be set on the right side of the fan-out wiring 105, but it is not limited to this. In other embodiments, the multi-way selection circuit 12 can also be set on the left side of the fan-out wiring 105. Those skilled in the art can set it according to actual needs.

[0112] Continue to refer Figure 1 , Figure 3 and Figure 7 Optionally, the touch driving circuit 13 is disposed on the second flexible circuit board 15 , the display panel 10 or the first flexible circuit board 14 .

[0113] For example, Figure 1 , Figure 3 and Figure 7 As shown, the touch driving circuit 13 can be arranged on the second flexible circuit board 15. Such an arrangement helps to reduce the number of the fifth binding terminal 65 and the sixth binding terminal 66, and reduces the difficulty of connecting the first flexible circuit board 14 and the second flexible circuit board 15, which is easy to implement. However, it is not limited to this. In other embodiments, the touch driving circuit 13 can also be arranged on the display panel 10 or the first flexible circuit board 14. Those skilled in the art can arrange it according to actual needs.

[0114] Continue to refer Figure 1 , Figure 7 , Fig.16 and Fig.17 Optionally, the touch driving circuit 13 is disposed on the second flexible circuit board 15, and the second binding area 70 further includes a plurality of ninth binding terminals 69, which are electrically connected to the second touch signal transmission terminals 23 in a one-to-one correspondence. The second flexible circuit board 15 further includes a plurality of tenth binding terminals 80, which are electrically connected to the corresponding touch driving signal pins 131 and / or touch sensing signal pins 132, and the ninth binding terminals 69 are electrically connected to the tenth binding terminals 80 in a one-to-one correspondence.

[0115] Among them, the ninth binding terminal 69 on the display panel 10 and the tenth binding terminal 80 on the second flexible circuit board 15 can be bound and connected, thereby realizing the connection between the second touch signal transmission terminal 23 on the display panel 10 and the touch drive signal pin 131 and / or the touch sensing signal pin 132 on the second flexible circuit board 15.

[0116] For example, Figure 1 , Fig.16 and Fig.17 As shown, taking the example in which the touch drive electrode 112 is electrically connected to the first touch signal transmission terminal 21 in one-to-one correspondence, and the second touch signal transmission terminal 23 is electrically connected to the corresponding touch drive signal pin 131, the second touch signal transmission terminal 23 is connected in sequence through the ninth binding terminal 69 of the second binding area 70 of the display panel 10 and the tenth binding terminal 80 on the second flexible circuit board 15 and the touch drive signal pin 131 on the second flexible circuit board 15.

[0117] In another embodiment, if Figure 7 , Fig.16 and Fig.17 As shown, taking the example in which the touch sensing electrodes 113 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, and the second touch signal transmission terminals 23 are electrically connected to the corresponding touch sensing signal pins 132, the second touch signal transmission terminals 23 are connected in sequence through the ninth binding terminal 69 of the second binding area 70 of the display panel 10 and the tenth binding terminal 80 on the second flexible circuit board 15 and the touch sensing signal pins 132 on the second flexible circuit board 15.

[0118] Continue to refer Figure 1 , Figure 7 , Fig.16 and Fig.17 Optionally, the second binding area 70 also includes a plurality of first control signal binding terminals 81, the first control signal binding terminals 81 are electrically connected to the corresponding control signal terminals 22, the second flexible circuit board 15 also includes a plurality of second control signal binding terminals 82, the second control signal binding terminals 82 are electrically connected to the corresponding control signal pins 133, and the first control signal binding terminals 81 are electrically connected to the second control signal binding terminals 82 in a one-to-one correspondence.

[0119] Among them, the first control signal binding terminal 81 on the display panel 10 and the second control signal binding terminal 82 on the second flexible circuit board 15 can be bound and connected, thereby realizing the connection between the control signal terminal 22 on the display panel 10 and the control signal pin 133 on the second flexible circuit board 15.

[0120] For example, Figure 1 , Fig.16 and Fig.17As shown, taking the example that the touch drive electrode 112 is electrically connected to the first touch signal transmission terminal 21 in a one-to-one correspondence, and the second touch signal transmission terminal 23 is electrically connected to the corresponding touch drive signal pin 131, the control signal terminal 22 is connected in sequence through the first control signal binding terminal 81 of the second binding area 70 of the display panel 10 and the second control signal binding terminal 82 on the second flexible circuit board 15 and the control signal pin 133 on the second flexible circuit board 15.

[0121] In another embodiment, if Figure 7 , Fig.16 and Fig.17 As shown, taking the example that the touch sensing electrode 113 is electrically connected to the first touch signal transmission terminal 21 in a one-to-one correspondence, and the second touch signal transmission terminal 23 is electrically connected to the corresponding touch sensing signal pin 132, the control signal terminal 22 can also be connected in sequence through the first control signal binding terminal 81 of the second binding area 70 of the display panel 10 and the second control signal binding terminal 82 on the second flexible circuit board 15 and the control signal pin 133 on the second flexible circuit board 15.

[0122] Based on the same inventive concept, an embodiment of the present invention further provides a control method for a touch display device, which is used for the touch display device provided by the above embodiment. Therefore, the control method for a touch display device provided by the embodiment of the present invention has the technical effect of the technical solution in the above embodiment, and the structures that are the same or corresponding to the above embodiment and the explanation of terms are not repeated here.

[0123] Among them, Figure 1 As shown, the touch driving electrodes 112 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, and the second touch signal transmission terminals 23 are electrically connected to the corresponding touch driving signal pins 131 .

[0124] Fig.18 A flow chart of a control method of a touch display device provided by an embodiment of the present invention is shown in FIG. Fig.18 As shown, the control method provided by the embodiment of the present invention includes:

[0125] S110 , outputting a control signal to the control signal terminal, so that the second touch signal transmission terminal and different first touch signal transmission terminals are turned on in a time-sharing manner.

[0126] S120 , controlling the touch driving electrodes to receive touch driving signals through the touch driving signal pins in a time-sharing manner.

[0127] Among them, by outputting a control signal to the control signal terminal, the second touch signal transmission terminal and the different first touch signal transmission terminals are turned on in a time-sharing manner, so as to output the touch drive signal to at least two touch drive electrodes in a time-sharing manner through one touch drive signal pin, that is, at least two touch drive electrodes can time-share the touch drive signal pin, thereby reducing the number of touch drive signal pins of the touch drive circuit, which helps to reduce the cost of the touch drive circuit.

[0128] Based on the same inventive concept, an embodiment of the present invention further provides a control method for a touch display device, which is used for the touch display device provided by the above embodiment. Therefore, the control method for a touch display device provided by the embodiment of the present invention has the technical effect of the technical solution in the above embodiment, and the structures that are the same or corresponding to the above embodiment and the explanation of terms are not repeated here.

[0129] Among them, Figure 7 As shown, the touch sensing electrodes 113 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, and the second touch signal transmission terminals 23 are electrically connected to the corresponding touch sensing signal pins 132 .

[0130] Fig.19 A flow chart of another control method of a touch display device provided by an embodiment of the present invention is shown as follows: Fig.19 As shown, the control method provided by the embodiment of the present invention includes:

[0131] S210 , outputting a control signal to the control signal terminal, so that the second touch signal transmission terminal and different first touch signal transmission terminals are turned on in a time-sharing manner.

[0132] S220 , controlling the touch sensing signal pin to receive the touch sensing signal through the touch sensing electrode in a time-sharing manner.

[0133] Among them, by outputting a control signal to the control signal terminal, the second touch signal transmission terminal and different first touch signal transmission terminals are turned on in time-sharing mode, so as to receive the touch sensing signals of at least two touch sensing electrodes in time-sharing mode through one touch sensing signal pin, that is, at least two touch sensing electrodes can time-sharingly reuse one touch sensing signal pin, thereby reducing the number of touch sensing signal pins of the touch driving circuit, which helps to reduce the cost of the touch driving circuit.

[0134] Based on the same inventive concept, an embodiment of the present invention further provides a control method for a touch display device, which is used for the touch display device provided by the above embodiment. Therefore, the control method for a touch display device provided by the embodiment of the present invention has the technical effect of the technical solution in the above embodiment, and the structures that are the same or corresponding to the above embodiment and the explanation of terms are not repeated here.

[0135] Among them, Fig.12 As shown, the touch driving electrodes 112 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, and the second touch signal transmission terminals 23 are electrically connected to the corresponding touch driving signal pins 131; the touch sensing electrodes 113 are electrically connected to the first touch signal transmission terminals 21 in a one-to-one correspondence, and the second touch signal transmission terminals 23 are electrically connected to the corresponding touch sensing signal pins 132.

[0136] Fig. 20 A flow chart of another method for controlling a touch display device provided by an embodiment of the present invention is shown as follows: Fig. 20 As shown, the control method provided by the embodiment of the present invention includes:

[0137] S310 , outputting a control signal to the control signal terminal, so that the second touch signal transmission terminal and different first touch signal transmission terminals are turned on in a time-sharing manner.

[0138] S320, controlling the touch sensing signal pin to receive the touch sensing signal through the touch sensing electrode in a time-sharing manner, and controlling the touch driving electrode to receive the touch driving signal through the touch driving signal pin in a time-sharing manner.

[0139] Among them, by outputting a control signal to the control signal terminal, the second touch signal transmission terminal and the different first touch signal transmission terminals are time-sharingly connected, so that the touch drive signal is output to at least two touch drive electrodes through one touch drive signal pin in time-sharing, that is, at least two touch drive electrodes can time-sharingly reuse one touch drive signal pin, thereby reducing the number of touch drive signal pins of the touch drive circuit, which helps to reduce the cost of the touch drive circuit. At the same time, the touch sensing signals of at least two touch sensing electrodes can be received in time-sharing through one touch sensing signal pin, that is, at least two touch sensing electrodes can time-sharingly reuse one touch sensing signal pin, thereby further reducing the number of touch sensing signal pins of the touch drive circuit, which helps to further reduce the cost of the touch drive circuit.

[0140] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0141] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A touch display device, characterized in that: include: Display panel; A touch panel located on the light-emitting side of the display panel; The touch panel comprises a first substrate, and a plurality of touch driving electrodes and a plurality of touch sensing electrodes are arranged on a side of the first substrate away from the display panel; the touch driving electrodes are arranged along a first direction and extend along a second direction; the touch sensing electrodes are arranged along the second direction and extend along the first direction, wherein the first direction and the second direction are both parallel to the plane where the display panel is located, and the first direction intersects with the second direction; a multi-way selection circuit, the multi-way selection circuit being located on the display panel; the multi-way selection circuit comprising at least two multi-way selection sub-circuits, each of the multi-way selection sub-circuits comprising at least two first touch signal transmission terminals, a control signal terminal and one second touch signal transmission terminal; the multi-way selection sub-circuit being used for time-sharingly conducting the second touch signal transmission terminal with different first touch signal transmission terminals according to a control signal received by the control signal terminal; A touch driving circuit, the touch driving circuit comprising a plurality of touch driving signal pins, a plurality of touch sensing signal pins and at least two control signal pins; the touch driving signal pins are used to output touch driving signals to the corresponding touch driving electrodes, the touch sensing signal pins are used to receive touch sensing signals from the corresponding touch sensing electrodes, and the control signal pins are used to output the control signals to the control signal terminals; The touch driving electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch driving signal pins; and / or, The touch sensing electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch sensing signal pins.

2. The touch display device according to claim 1, characterized in that: The touch driving electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch driving signal pins; The touch driving electrodes are divided into N types of touch driving electrodes, wherein N is a positive integer greater than 1; The multi-channel selection sub-circuit includes N first touch signal transmission terminals, and different first touch signal transmission terminals of the same multi-channel selection sub-circuit are electrically connected to different types of touch driving electrodes respectively; The N types of touch driving electrodes are arranged in sequence along the first direction, or the N types of touch driving electrodes are arranged alternately along the first direction.

3. The touch display device according to claim 1, characterized in that: The touch sensing electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch sensing signal pins; The touch sensing electrodes are divided into M types of touch sensing electrodes, where M is a positive integer greater than 1; The multi-channel selection sub-circuit includes M first touch signal transmission terminals, and different first touch signal transmission terminals of the same multi-channel selection sub-circuit are electrically connected to different types of touch sensing electrodes respectively; The M types of touch sensing electrodes are arranged in sequence along the second direction, or the M types of touch sensing electrodes are arranged alternately along the second direction.

4. The touch display device according to claim 1, characterized in that: The multiplex selection circuit includes a first multiplex selection circuit and a second multiplex selection circuit; The touch driving electrodes are electrically connected to the first touch signal transmission terminals of the first multiplex selection circuit in a one-to-one correspondence, and the second touch signal transmission terminals of the first multiplex selection circuit are electrically connected to the corresponding touch driving signal pins; The touch sensing electrodes are electrically connected to the first touch signal transmission terminals of the second multiplex selection circuit in a one-to-one correspondence, and the second touch signal transmission terminals of the second multiplex selection circuit are electrically connected to the corresponding touch sensing signal pins.

5. The touch display device according to claim 1, characterized in that: The multiplex selection subcircuit includes at least two transistors, and the transistor includes a first terminal, a second terminal and a control terminal; In the same multi-way selection sub-circuit, the first end of the transistor serves as the first touch signal transmission terminal of the multi-way selection sub-circuit; the second ends of different transistors are electrically connected to each other and serve as the second touch signal transmission terminal of the multi-way selection sub-circuit; the control end of the transistor serves as the control signal terminal of the multi-way selection sub-circuit; In the same multi-way selection sub-circuit, control terminals of different transistors are electrically connected to different control signal pins.

6. The touch display device according to claim 1, characterized in that: The touch display device further includes a first flexible circuit board and a second flexible circuit board electrically connected to the first flexible circuit board; The first flexible circuit board is electrically connected to the touch driving electrodes and the touch sensing electrodes respectively, and the second flexible circuit board is electrically connected to the multi-way selection circuit; The touch driving electrodes and / or the touch sensing electrodes are electrically connected to the first touch signal transmission terminals through the first flexible circuit board and the second flexible circuit board.

7. The touch display device according to claim 6, characterized in that: The touch panel comprises a first binding area and a plurality of first binding terminals and a plurality of second binding terminals located in the first binding area, the first binding terminals being electrically connected to the touch driving electrodes in a one-to-one correspondence, and the second binding terminals being electrically connected to the touch sensing electrodes in a one-to-one correspondence; The first flexible circuit board includes a plurality of third binding terminals and a plurality of fourth binding terminals, the third binding terminals are electrically connected to the first binding terminals in a one-to-one correspondence, and the fourth binding terminals are electrically connected to the second binding terminals in a one-to-one correspondence; The first flexible circuit board further includes a plurality of fifth binding terminals, and the fifth binding terminals are electrically connected to the third binding terminals and / or the fourth binding terminals in a one-to-one correspondence; The second flexible circuit board includes a plurality of sixth binding terminals, and the sixth binding terminals are electrically connected to the fifth binding terminals in a one-to-one correspondence; The second flexible circuit board further includes a plurality of seventh binding terminals, and the seventh binding terminals are electrically connected to the sixth binding terminals in a one-to-one correspondence; The display panel comprises a display area and a non-display area arranged around the display area, the non-display area comprises a second binding area and a plurality of eighth binding terminals located in the second binding area, the eighth binding terminals being electrically connected to the first touch signal transmission terminals in a one-to-one correspondence; The eighth binding terminal is electrically connected to the seventh binding terminal in a one-to-one correspondence.

8. The touch display device according to claim 7, characterized in that: Along a direction parallel to a plane where the display panel is located, the first binding area and the second binding area are located on a same side of the display area.

9. The touch display device according to claim 7, characterized in that: The display panel further includes a display driving circuit, a plurality of display signal lines located in the display area, and a plurality of fan-out lines located in the non-display area, wherein the fan-out lines are connected to the display signal lines in a one-to-one correspondence, and the fan-out lines are electrically connected to the display driving circuit; The multiplexer circuit and the fan-out wiring are located on the same side of the display area; Along the thickness direction of the display panel, there is a gap between the multiplexing circuit and the fan-out wiring.

10. The touch display device according to claim 9, characterized in that: The fan-out routing includes a first fan-out routing and a second fan-out routing, and the first fan-out routing and the second fan-out routing are arranged along a third direction; Along the third direction, the multiplexing circuit is located between the first fan-out wiring and the second fan-out wiring; The third direction is parallel to the plane where the display panel is located, and the third direction is perpendicular to the direction from the display area to the non-display area.

11. The touch display device according to claim 9, characterized in that: Along the third direction, the multiplexing circuit is located on one side of the fan-out wiring; The third direction is perpendicular to a direction from the display area to the non-display area.

12. The touch display device according to claim 7, characterized in that: The touch driving circuit is disposed on the second flexible circuit board, the display panel or the first flexible circuit board.

13. The touch display device according to claim 7, characterized in that: The touch driving circuit is arranged on the second flexible circuit board; The second binding area further includes a plurality of ninth binding terminals, and the ninth binding terminals are electrically connected to the second touch signal transmission terminals in a one-to-one correspondence; The second flexible circuit board further includes a plurality of tenth binding terminals, and the tenth binding terminals are electrically connected to the corresponding touch driving signal pins and / or the touch sensing signal pins; The ninth binding terminal is electrically connected to the tenth binding terminal in a one-to-one correspondence.

14. The touch display device according to claim 13, characterized in that: The second binding area further includes a plurality of first control signal binding terminals, and the first control signal binding terminals are electrically connected to corresponding control signal terminals; The second flexible circuit board further includes a plurality of second control signal binding terminals, and the second control signal binding terminals are electrically connected to the corresponding control signal pins; The first control signal binding terminal is electrically connected to the second control signal binding terminal in a one-to-one correspondence.

15. A control method for a touch display device, characterized in that: Used in the touch display device according to any one of claims 1-2 and 4-14; wherein the touch drive electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch drive signal pins; The control method comprises: outputting the control signal to the control signal terminal so that the second touch signal transmission terminal is turned on with different first touch signal transmission terminals in a time-sharing manner; The touch driving electrodes are controlled to receive the touch driving signals through the touch driving signal pins in a time-sharing manner.

16. A control method for a touch display device, characterized in that: Used in the touch display device according to any one of claims 1, 3-14; wherein the touch sensing electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch sensing signal pins; The control method comprises: outputting the control signal to the control signal terminal so that the second touch signal transmission terminal is turned on with different first touch signal transmission terminals in a time-sharing manner; The touch sensing signal pin is controlled to receive the touch sensing signal through the touch sensing electrode in a time-sharing manner.

17. A control method for a touch display device, characterized in that: Used in the touch display device according to any one of claims 1, 4 to 14; wherein the touch driving electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch driving signal pins; the touch sensing electrodes are electrically connected to the first touch signal transmission terminals in a one-to-one correspondence, and the second touch signal transmission terminals are electrically connected to the corresponding touch sensing signal pins; The control method comprises: outputting the control signal to the control signal terminal so that the second touch signal transmission terminal is turned on with different first touch signal transmission terminals in a time-sharing manner; The touch sensing signal pin is controlled to receive the touch sensing signal through the touch sensing electrode in a time-sharing manner, and the touch driving electrode is controlled to receive the touch driving signal through the touch driving signal pin in a time-sharing manner.

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