Signal control method, control chip, and touch display panel

Abstract

A signal control method, a control chip, and a touch display panel. The signal control method is applicable to a touch display panel including a plurality of scan lines, a plurality of data lines, a demultiplexer, a control chip, and a plurality of dummy wires. The dummy wires are located above the data lines, and the demultiplexer includes a plurality of switches coupled to the plurality of data lines. The signal control method includes: in the display stage, sequentially switching the plurality of scan lines to an enabling level; when a first scan line among the plurality of scan lines has the enabling level, sequentially turning on the plurality of switches to transmit a plurality of display data to the plurality of data lines. A first switch among the plurality of switches is coupled to a first data line among the plurality of data lines, and the first data line corresponds to one of the plurality of dummy wires in the vertical direction. When the first scan line has the enabling level, the first switch is turned on after the other switches are turned on; in the touch stage, setting the dummy wires to a touch voltage.

Description

Technical Field

[0001] The present disclosure relates to a touch screen technology, and particularly to a signal control method, a control chip, and a touch display panel. Background Art

[0002] With the progress of display technology, display devices have become an integral part of modern people's lives. Therefore, the convenience of operation and the diversity of functions of display devices have become one of the key points in the development of display technology. Touch display devices are widely used in various electronic products today due to their intuitive and convenient operation methods.

[0003] However, in a touch display device, since the display circuit and the touch circuit overlap each other in the vertical direction, when the touch display device is displaying, some data lines in the display circuit may be coupled with the touch circuit, resulting in the problem of uneven brightness in the display screen. Therefore, how to solve the problem of uneven brightness of touch display devices is one of the topics in this field. Summary of the Invention

[0004] To solve the above problems, the present disclosure provides a signal control method applicable to a touch display panel. The touch display panel includes a plurality of scan lines, a plurality of data lines, a demultiplexer, a control chip, and a plurality of dummy wires. The plurality of dummy wires are located above the plurality of data lines. The demultiplexer includes a plurality of switches coupled to the plurality of data lines. The signal control method includes: during the display phase, sequentially switching the plurality of scan lines to an enabling level by the control chip; during the display phase, when a first scan line among the plurality of scan lines has the enabling level, sequentially turning on the plurality of switches by the control chip to transmit a plurality of display data to the plurality of data lines, wherein a first switch among the plurality of switches is coupled to a first data line among the plurality of data lines, and the first data line corresponds to one of the plurality of dummy wires in the vertical direction, and the first switch is turned on after the other switches among the plurality of switches are turned on when the first scan line has the enabling level; and during the touch phase, setting the plurality of dummy wires to a touch voltage by the control chip to perform touch sensing.

[0005] The present disclosure provides a control chip for being disposed on a touch display panel including a plurality of scan lines, a plurality of data lines, a demultiplexer, and a plurality of dummy wires, wherein the plurality of dummy wires are located above the plurality of data lines, and the demultiplexer includes a plurality of switches coupled to the plurality of data lines. The control chip is configured to: sequentially switch the plurality of scan lines to an enabling level during a display phase; during the display phase, when a first scan line among the plurality of scan lines has the enabling level, sequentially turn on the plurality of switches to transmit a plurality of display data to the plurality of data lines, wherein a first switch among the plurality of switches is coupled to a first data line among the plurality of data lines, and the first data line corresponds to one of the plurality of dummy wires in a vertical direction, and the first switch is turned on after other switches among the plurality of switches are turned on when the first scan line has the enabling level; and set the plurality of dummy wires to a touch voltage to perform touch sensing during a touch phase.

[0006] The present disclosure provides a touch display panel including a plurality of scan lines, a demultiplexer, a plurality of data lines, a plurality of dummy wires, and a control chip. The demultiplexer includes a plurality of switches. The plurality of data lines are coupled to the plurality of switches, wherein a first switch among the plurality of switches is coupled to a first data line among the plurality of data lines. The plurality of dummy wires are located above the plurality of data lines, wherein the first data line corresponds to one of the plurality of dummy wires in a vertical direction. The control chip is coupled to the plurality of scan lines, the demultiplexer, and the plurality of dummy wires, and is configured to sequentially switch the plurality of scan lines to an enabling level during a display phase; during the display phase, when a first scan line among the plurality of scan lines has the enabling level, sequentially turn on the plurality of switches to transmit a plurality of display data to the plurality of data lines, wherein the first switch is turned on after other switches among the plurality of switches are turned on when the first scan line has the enabling level; and set the plurality of dummy wires to a touch voltage to perform touch sensing during a touch phase.

[0007] By using the signal control method, the control chip, and the touch display panel of the present disclosure, it is possible to overcome the problem of uneven brightness of the display screen caused by the mutual coupling between the data lines and the dummy wires according to the timing of transmitting display data of the touch display panel. Description of the Drawings

[0008] To make the above and other objects, features, advantages, and embodiments of the present disclosure more apparent and understandable, the description of the drawings is as follows:

[0009] Figure 1 It is a simplified functional block diagram of a pixel circuit matrix and related control circuits of a touch display panel according to some embodiments;

[0010] Figure 2 It is a simplified functional block diagram of a touch electrode matrix and related control circuits of a touch display panel according to some embodiments;

[0011] Figures 3A - 3B is a timing diagram of a scan signal and a switch signal according to some embodiments;

[0012] Figure 4 is a flowchart of a signal control method according to some embodiments.

[0013]

Symbol description

[0014] 100: Touch display panel

[0015] 110: Control chip

[0016] 120[1]~120[X]: Demultiplexer

[0017] 121~123: Switch

[0018] DL[1]~DL[N]: Data line

[0019] DML[1]~DML[P]: dummy wire

[0020] SL[1]~SL[M]: Scan line

[0021] PX: Pixel circuit

[0022] TE: Touch electrode

[0023] G1~GM: Scan signal

[0024] SW1~SW3: Switch signal

[0025] P1, P2: Time period

[0026] VCOM: Common voltage

[0027] 400: Signal control method

[0028] 410~450: Steps Detailed implementation manners

[0029] In this disclosure document, when an element is referred to as "connected" or "coupled", it may mean "electrically connected" or "electrically coupled". "Connected" or "coupled" can also be used to indicate the mutual cooperation operation or interaction between two or more elements. In addition, although terms such as "first", "second",... are used in this disclosure document to describe different elements, these terms are only used to distinguish elements or operations described with the same technical terms. Unless the context clearly indicates, these terms do not specifically refer to or imply an order or sequence, nor are they used to limit this disclosure document.

[0030] Embodiments of the present disclosure will be described below in conjunction with the relevant drawings. In the drawings, the same reference numerals denote the same or similar elements or method flows.

[0031] Since some elements in the touch display panel 100 of the present disclosure overlap each other in the vertical direction, in order to clearly illustrate the structure of the touch display panel 100, please refer to Figure 1 and Figure 2 . Figure 1 FIG. is a simplified functional block diagram of the pixel circuit matrix and related control circuits of the touch display panel 100 according to some embodiments. Figure 2 FIG. is a simplified functional block diagram of the touch electrode matrix and related control circuits of the touch display panel 100 according to some embodiments. In some embodiments, the touch display panel 100 includes a plurality of scan lines SL[1] to SL[M], a control chip 110, a plurality of demultiplexers 120[1] to 120[X], a plurality of data lines DL[1] to DL[N], and a plurality of dummy lines DML[1] to DML[P]. The control chip 110 is coupled to the scan lines SL[1] to SL[M], the demultiplexers 120[1] to 120[X], and the dummy lines DML[1] to DML[P], where M and N are positive integers, and P is a positive integer less than or equal to N.

[0032] The dummy lines DML[1] to DML[P] are located above the data lines DL[1] to DL[N]. When the present disclosure mentions that one element is "above" another element, it means that the formation order (such as vapor deposition) of the element on a substrate is after that of the other element. In other words, the metal layer where the dummy lines DML[1] to DML[P] are located is formed after the metal layer where the data lines DL[1] to DL[N] are located.

[0033] In some embodiments, the control chip 110 can be implemented by a touch and display driver integration (TDDI) chip.

[0034] In some embodiments, as Figure 1 shown, the touch display panel 100 further includes a plurality of pixel circuits PX. The pixel circuits PX are arranged in M pixel columns coupled to the scan lines SL[1] to SL[M] and N pixel rows coupled to the data lines DL[1] to DL[N].

[0035] Each of the demultiplexers 120[1] to 120[X] includes a plurality of switches 121 to 123, where the switches 121 to 123 are respectively coupled to a part of the data lines DL[1] to DL[N]. Taking the demultiplexer 120[1] as an example, the switch 121 is coupled to the data line DL[1], the switch 122 is coupled to the data line DL[3], and the switch 123 is coupled to the data line DL[5].

[0036] It should be noted that Figure 1 the number of the switches 121 to 123 in each of the demultiplexers 120[1] to 120[X], and the connection relationship between the switches 121 to 123 and the data lines DL[1] to DL[N] are only examples, rather than being used to limit this disclosure. The number of other switches and the connection relationship between the switches and the data lines DL[1] to DL[N] are all within the scope of this disclosure.

[0037] In some embodiments, as Figure 2 shown, the first ends of the dummy wires DML[1] to DML[P] are coupled to each other, the second ends of the dummy wires DML[1] to DML[P] are coupled to the node N1, and the node N1 is coupled to the control chip 110. In other embodiments, the first ends of the dummy wires DML[1] to DML[P] are coupled to each other, and the second ends of the dummy wires DML[1] to DML[P] are not coupled to each other, but are respectively coupled to a plurality of pins (not shown) of the control chip 110.

[0038] In some embodiments, as Figure 2 shown, the touch display panel 100 further includes a plurality of touch electrodes TE. The touch electrodes TE are arranged in P touch electrode rows, and the P touch electrode rows and the dummy wires DML[1] to DML[P] are alternately arranged in a manner that one touch electrode row alternates with one dummy wire.

[0039] Please refer to Figure 1 and Figure 2 together. For each demultiplexer, the data line coupled to one of the switches 121 to 123 corresponds to one of the dummy wires DML[1] to DML[P] in the vertical direction. For example, as Figure 2 shown, the data line DL[5] coupled to the switch 123 of the demultiplexer 120[1] corresponds to the dummy wire DML[3] in the vertical direction. Another example, as Figure 2 shown, the data line DL[2] coupled to the switch 123 of the demultiplexer 120[2] corresponds to the dummy wire DML[2] in the vertical direction, and so on.

[0040] In some embodiments, "vertically corresponding to each other" means that the dummy wire and its corresponding data line are located between two adjacent ones of the N pixel rows. For example, the dummy wire DML[3] and the data line DL[5] are located between the 4th pixel row and the 5th pixel row (i.e., between the 4th row and the 5th row of the pixel circuit PX). In other embodiments, "vertically corresponding to each other" means that the vertical projection of the dummy wire on a substrate (not shown) of the touch display panel 100 at least partially overlaps the vertical projection of its corresponding data line on the substrate.

[0041] In operation, the control chip 110 is configured to perform various operations in the display stage and the touch stage. In addition, in the display stage, the control chip 110 is further configured to transmit the switch signals SW1 to SW3 to the demultiplexers 120[1] to 120[X] to sequentially turn on the switches 121 to 123, and then transmit the display data to the data lines DL[1] to DL[N]. For example, when the switch signal SW1 changes from the disabled level to the enabled level, the switch 121 is turned on, and then the control chip 110 can transmit the display data to the data lines DL[1], DL[4],..., DL[N - 5], and DL[N - 2]. In some embodiments, in the display stage, the control chip 110 is configured to transmit the scan signals G1 to GM to the scan lines SL[1] to SL[M] to sequentially switch the scan lines SL[1] to SL[M] to the enabled level or the disabled level. For example, in the display stage, when the scan signal G1 changes from the disabled level to the enabled level, the scan line SL[1] is switched from the disabled level to the enabled level to drive the pixel circuit PX to receive the display data from the data lines DL[1] to DL[N].

[0042] In addition, in the display stage, the control chip 110 is further configured to transmit the common voltage VCOM to the dummy wires DML[1] to DML[P] in the display stage. According to the common voltage VCOM and the display data, the pixel circuit PX can display a specific brightness. For example, in some embodiments, the pixel circuit PX can be implemented by a liquid crystal pixel circuit, and the dummy wires DML[1] to DML[P] can serve as one side electrode of the liquid crystal capacitor, and the other side electrode of the liquid crystal capacitor is used to receive the display data.

[0043] In some embodiments, in the touch stage, the control chip 110 is configured to set the dummy wires DML[1] to DML[P] to a touch voltage for touch sensing. The dummy wires DML[1] to DML[P] having the touch voltage are used to prevent external magnetic fields from interfering with the touch electrodes TE, and are used to prevent the touch electrodes TE in different rows from interfering with each other, and are used to assist in detecting the lateral movement of the user's finger. In some embodiments, in the touch stage, the control chip 110 is further configured to turn off the switches 121 to 123.

[0044] Operationally, during the period when the scan lines SL[1] to SL[M] have an enabling level, after the switch signals SW1 to SW3 are switched from the enabling level to the disabling level, the data lines DL[1] to DL[N] do not receive display data from the control chip 110, and at this time, the capacitors of the pixel circuits PX are still electrically connected to the data lines. However, the voltage on the dummy wire at this time may have deviated from the common voltage VCOM due to the influence of the previous display data and is gradually recovering to the common voltage VCOM. Therefore, the dummy wire will be coupled to the data lines corresponding to each other in the vertical direction, resulting in unstable voltage levels on the data lines, thereby affecting the brightness of the pixel circuits PX.

[0045] In the signal control method proposed in this disclosure document, when the control chip 110 transmits the scan signals G1 to GM and the switch signals SW1 to SW3 with specific timings to the scan lines SL[1] to SL[M] and the switches 121 to 123, the coupling problem between the dummy wire and the data lines can be solved. The timing relationship between the scan signals G1 to GM and the switch signals SW1 to SW3 will be described in more detail below.

[0046] Figures 3A - 3B FIG. is a timing diagram of the scan signals G1 to G3 and the switch signals SW1 to SW3 according to some embodiments. Please first refer to Figure 3A , in some embodiments, the switch signals SW1 to SW3 will sequentially switch to the enabling level during the period when the scan signals G1 to G3 have an enabling level (i.e., during the period when the scan lines SL[1] to SL[3] have an enabling level). For example, during the period when the scan signal G1 has an enabling level (i.e., during the period when the scan line SL[1] has an enabling level), the switch signals SW1 to SW3 will sequentially switch to the enabling level, so the switches 121 to 123 will sequentially turn on. Subsequently, during the period when the scan signal G2 has an enabling level (i.e., during the period when the scan line SL[2] has an enabling level), the switch signals SW1 to SW3 will again sequentially switch to the enabling level, so the switches 121 to 123 will again sequentially turn on.

[0047] Since the switch signals SW1 to SW3 have the same waveform during each period when the scan signals G1 to GM have an enabling level, and the demultiplexers 120[1] to 120[X] have similar operations to each other, for the sake of simplicity, only the demultiplexer 120[1] is used below to illustrate the timing relationship among the switch signals SW1 to SW3, the scan signal G1, and the scan signal G2, and the rest can be inferred by analogy.

[0048] In Figure 3AIn the embodiment, the data lines coupled to each switch 123 correspond to one of the dummy wires DML[1] to DML[P] in the vertical direction. For example, referring again to FIG. 2, the data line DL[2] coupled to the switch 123 of the demultiplexer 120[2] corresponds to the dummy wire DML[2] in the vertical direction; the data line DL[5] coupled to the switch 123 of the demultiplexer 120[1] corresponds to the dummy wire DML[3] in the vertical direction.

[0049] In Figure 3A the embodiment, during the period when the scan line has an enabling level, the switch signal SW3 for controlling the switch 123 will be the last one to switch to the enabling level among the switch signals SW1 to SW3. In other words, in this embodiment, during the period when the scan line has an enabling level, the switch 123 will conduct after the switches 121 and 122 are turned on.

[0050] In addition, in Figure 3A the embodiment, the pulse width of the switch signal SW3 is greater than or equal to the pulse widths of the switch signals SW1 and SW2. For example, the switch signal SW3 will maintain the enabling level after the scan signal G1 switches to the disabling level, and switch to the disabling level before the scan signal G2 switches to the enabling level (i.e., the time periods P1 and P2 indicated by the double arrows). Therefore, the switch 123 will turn off after the scan line SL[1] switches to the disabling level and before the scan line SL[2] switches to the enabling level. In some embodiments, the switch signal SW3 will switch to the disabling level when the scan signal G1 switches to the disabling level. Therefore, the switch 123 will turn off when the scan line SL[1] switches to the disabling level.

[0051] By delaying the turn-off time point of the switch 123, the data lines DL[2], DL[5],..., DL[N - 4] and DL[N - 1] coupled to the switch 123 can continuously receive display data from the control chip 110 after the scan lines SL[1] to SL[M] switch to the disabling level, so as to prevent the common voltage VCOM change on the dummy wires DML[1] to DML[P] from affecting the pixel circuit PX through the data lines DL[2], DL[5],..., DL[N - 4] and DL[N - 1], so that the touch display panel 100 can provide a uniformly bright picture.

[0052] Please refer again to Figure 3B In Figure 3B a certain touch display panel (not shown) of the embodiment, the data lines coupled to all the switches 122 correspond to one of the dummy wires DML[1] to DML[P] in the vertical direction.

[0053] In Figure 3BIn an embodiment, during a period when a scan line has an enabling level, the switching signal SW2 for controlling the switch 122 will be the last one among the switching signals SW1 to SW3 to switch to the enabling level. In other words, in this embodiment, during a period when a scan line has an enabling level, the switch 122 will turn on after the switches 121 and 123 are turned on.

[0054] In addition, in Figure 3B an embodiment, the pulse width of the switching signal SW2 is greater than or equal to the pulse widths of the switching signals SW1 and SW3. For example, the switching signal SW2 will maintain the enabling level after the scan signal G1 switches to the disabling level, and switch to the disabling level before the scan signal G2 switches to the enabling level (i.e., in the time periods P1 and P2 indicated by the double arrow). Therefore, the switch 122 will turn off after the scan line SL[1] switches to the disabling level and before the scan line SL[2] switches to the enabling level. In some embodiments, the switching signal SW2 will switch to the disabling level when the scan signal G1 switches to the disabling level. Therefore, the switch 122 will turn off when the scan line SL[1] switches to the disabling level.

[0055] In summary, by designing the switches coupled to the data lines corresponding to the dummy wires DML[1] to DML[P] in the vertical direction to be controlled by the same switching signal, and designing this switching signal to switch to the disabling level later than the scan signal, it is possible to prevent the change in the common voltage VCOM on the dummy wires DML[1] to DML[P] from affecting the brightness of the pixel circuit PX.

[0056] Figure 4 FIG. 400 is a flowchart of a signal control method 400 according to some embodiments. The signal control method 400 includes steps 410 to 430 in the display stage and steps 440 and 450 in the touch stage. In step 410 of the display stage, the control chip 110 sequentially switches the scan lines SL[1] to SL[M] to the enabling level.

[0057] In step 420 of the display stage, during a period when one of the scan lines SL[1] to SL[M] (e.g., the scan line G1) has an enabling level, the control chip 110 sequentially turns on the switches 121 to 123 to transmit display data to the data lines DL[1] to DL[N], thereby controlling the brightness of the pixel circuit PX.

[0058] In step 430 of the display phase, the control chip 110 transmits a common voltage VCOM to dummy wires DML[1] to DML[P] to control the brightness of the pixel circuit PX. In some embodiments, switch 123 among switches 121 to 123 is coupled to the data line DL[2], and the data line DL[2] corresponds to the dummy wire DML[2] in the vertical direction. When the aforementioned scan line (e.g., scan line G1) has an enabling level, switch 123 turns on after switches 121 to 122 turn on.

[0059] In step 440 of the touch phase, the control chip 110 sets the dummy wires DML[1] to DML[P] to touch voltages for touch sensing.

[0060] In step 450 of the touch phase, the control chip 110 switches the switch signals SW1 to SW3 to a disabling level to turn off switches 121 to 123.

[0061] It should be noted that Figure 4 The execution order of the steps in is only an example and is not used to limit this disclosure document. Other suitable execution orders of the steps are all within the scope of this disclosure document. For example, in some embodiments, steps 420 and 430 in the display phase can be performed simultaneously or the execution order can be exchanged. In other embodiments, steps 440 and 450 in the touch phase can be performed simultaneously or the execution order can be exchanged.

[0062] The signal control method 400, the control chip 110, and the touch display panel 100 proposed in this disclosure document can overcome the problem of uneven brightness of the display screen caused by the coupling between the dummy wire and its corresponding data line by adjusting the timing relationship of the switch signals SW1 to SW3 transmitted to switches 121 to 123.

[0063] The above are only the preferred embodiments of this disclosure document. All equivalent changes and modifications made according to the claims of this disclosure document shall fall within the scope of this disclosure document.

Claims

1. A signal control method, applicable to a touch display panel, wherein the touch display panel includes a plurality of scan lines, a plurality of data lines, a demultiplexer, a control chip, and a plurality of dummy wires, the plurality of dummy wires being located above the plurality of data lines, the demultiplexer including a plurality of switches coupled to the plurality of data lines, and the signal control method includes: In a display phase, sequentially switching the plurality of scan lines to an enabling level by the control chip; In the display phase, during a period when a first scan line among the plurality of scan lines has the enabling level, sequentially turning on the plurality of switches by the control chip to transmit a plurality of display data to the plurality of data lines, wherein a first switch among the plurality of switches is coupled to a first data line among the plurality of data lines, and the first data line corresponds to one of the plurality of dummy wires in a vertical direction, and during a period when the first scan line has the enabling level, the first switch is turned on after other switches among the plurality of switches are turned on, and wherein a conduction period of the first switch in the display phase is longer than a conduction period of other switches among the plurality of switches in the display phase; and In a touch phase, setting the plurality of dummy wires to a touch voltage by the control chip for touch sensing.

2. The signal control method according to claim 1, wherein the first switch is turned off after the first scan line is switched to a disabling level and before a second scan line among the plurality of scan lines is switched to the enabling level, and the second scan line is adjacent to the first scan line.

3. The signal control method according to claim 1, wherein the touch display panel includes a plurality of pixel circuits, and the signal control method further includes: In the display phase, transmitting a common voltage to the plurality of dummy wires by the control chip, wherein the common voltage and the plurality of display data are used to control brightness of the plurality of pixel circuits.

4. The signal control method according to claim 1, further including: In the touch phase, turning off the plurality of switches by the control chip.

5. A control chip, for being disposed on a touch display panel including a plurality of scan lines, a plurality of data lines, a demultiplexer, and a plurality of dummy wires, wherein the plurality of dummy wires are located above the plurality of data lines, the demultiplexer includes a plurality of switches coupled to the plurality of data lines, and the control chip is configured to: In a display phase, sequentially switch the plurality of scan lines to an enabling level; In the display phase, during a period when a first scan line among the plurality of scan lines has the enabling level, sequentially turn on the plurality of switches to transmit a plurality of display data to the plurality of data lines, wherein a first switch among the plurality of switches is coupled to a first data line among the plurality of data lines, and the first data line corresponds to one of the plurality of dummy wires in a vertical direction, and during a period when the first scan line has the enabling level, the first switch is turned on after other switches among the plurality of switches are turned on, and wherein a conduction period of the first switch in the display phase is longer than a conduction period of other switches among the plurality of switches in the display phase; and In the touch stage, the plurality of dummy wires are set to a touch voltage for touch sensing.

6. The control chip according to claim 5, wherein the first switch is turned off after the first scan line is switched to the disable level and before the second scan line among the plurality of scan lines is switched to the enable level, and the second scan line is adjacent to the first scan line.

7. The control chip according to claim 5, wherein the touch display panel includes a plurality of pixel circuits, and the control chip is further configured to: In the display stage, transmit a common voltage to the plurality of dummy wires, wherein the common voltage and the plurality of display data are used to control the brightness of the plurality of pixel circuits.

8. The control chip according to claim 5, further configured to turn off the plurality of switches in the touch stage.

9. A touch display panel, comprising: A plurality of scan lines; A demultiplexer including a plurality of switches; A plurality of data lines coupled to the plurality of switches, wherein a first switch among the plurality of switches is coupled to a first data line among the plurality of data lines; A plurality of dummy wires located above the plurality of data lines, wherein the first data line corresponds to one of the plurality of dummy wires in the vertical direction; And A control chip coupled to the plurality of scan lines, the demultiplexer, and the plurality of dummy wires, for: Sequentially switching the plurality of scan lines to the enable level in the display stage; In the display stage, when the first scan line among the plurality of scan lines has the enable level, sequentially turning on the plurality of switches to transmit a plurality of display data to the plurality of data lines, wherein when the first scan line has the enable level, the first switch is turned on after the other switches among the plurality of switches are turned on, and wherein the period during which the first switch is turned on in the display stage is longer than the period during which the other switches among the plurality of switches are turned on in the display stage; And Setting the plurality of dummy wires to a touch voltage for touch sensing in the touch stage.

10. The touch display panel according to claim 9, further comprising: A plurality of pixel circuits arranged as a plurality of pixel columns coupled to the plurality of scan lines and as a plurality of pixel rows coupled to the plurality of data lines, Wherein one of the plurality of dummy wires and the first data line are located between two adjacent ones of the plurality of pixel rows.

11. The touch display panel according to claim 10, wherein the control chip is further configured to transmit a common voltage to the plurality of dummy wires in the display stage, wherein the common voltage and the plurality of display data are used to control the brightness of the plurality of pixel circuits.

12. The touch display panel according to claim 9, wherein the first switch is turned off after the first scan line is switched to the disable level and before the second scan line among the plurality of scan lines is switched to the enable level, and the second scan line is adjacent to the first scan line.

13. The touch display panel according to claim 9, further comprising a plurality of touch electrodes, wherein the plurality of touch electrodes are arranged as a plurality of touch electrode rows, and the plurality of touch electrode rows are alternately arranged with the plurality of dummy wires.

14. The touch display panel as claimed in claim 9, wherein the plurality of first ends of the plurality of dummy wires are coupled to each other, and the plurality of second ends of the plurality of dummy wires are respectively coupled to a plurality of pins of the control chip.

15. The touch display panel as claimed in claim 9, wherein the plurality of first ends of the plurality of dummy wires are coupled to each other, the plurality of second ends of the plurality of dummy wires are coupled to a node, and the node is coupled to the control chip.

16. The touch display panel as claimed in claim 9, wherein the control chip is further configured to turn off the plurality of switches during the touch stage.

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