Touch display panel and electronic device comprising same

Abstract

Provided in the present disclosure is a touch display panel, comprising a control region and a peripheral region surrounding the control region. A plurality of data lines and a plurality of touch lines extend into the peripheral region; each data line is electrically connected to a data line electrostatic discharge conductor by means of a data line electrostatic discharge unit; and by means of a touch line electrostatic discharge unit, each touch line is electrically connected to a touch line electrostatic discharge conductor. The data line electrostatic discharge unit and the touch line electrostatic discharge unit are both configured to: conduct an input end and an output end in response to a voltage applied to the input end being greater than or equal to a discharge threshold voltage, and turn off the conduction between the input end and the output end in response to a voltage at the input end being less than the discharge threshold voltage. The present disclosure also relates to an electronic device comprising the touch display panel. (Abstract: figure 2)

Description

Touch display panel and electronic device including the same Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular, to a touch display panel including an electrostatic discharge unit arranged around the touch display panel, and also to an electronic device including the touch display panel. Background Art

[0002] Recently, electronic devices incorporating touch display panels have become increasingly widespread. During use, touch operations and friction often cause a large amount of static electricity to accumulate on these electronic devices. The resulting electrostatic discharge (ESD) issue is a growing concern. Furthermore, array inspection of data lines and touch lines is crucial in electronic devices incorporating touch display panels.

[0003] For electronic devices that include conventional non-touch display panels, since there are only data lines, a single-row setting is adopted for the electrostatic discharge protection of the data lines. However, for electronic devices that include touch display panels, the use of an ordinary single-row setting for the electrostatic discharge protection of the data lines and touch lines will cause the defective detection of the data lines and touch lines to interfere with each other, and there are too many electrostatic discharge thin-film transistors connected to the electrostatic discharge circuit, which is not conducive to the arrangement of the electrostatic discharge transistors of the touch display panel and the electrostatic discharge voltage divider.

[0004] Summary of the Invention

[0005] According to a first aspect of the present disclosure, a touch display panel is provided, comprising: a control area configured to display and sense a user's touch operation; a peripheral area surrounding the control area; a plurality of data lines and a plurality of touch lines extending from the control area into the peripheral area, wherein in the peripheral area, each data line is electrically connected to an input end of a data line electrostatic discharge unit, an output end of the data line electrostatic discharge unit is electrically connected to a data line electrostatic discharge conductor, and each touch line is electrically connected to an input end of the touch line electrostatic discharge unit, an output end of the touch line electrostatic discharge unit is electrically connected to a touch line electrostatic discharge conductor; wherein the data line electrostatic discharge unit is configured to: respond to a voltage applied at the input end of the data line electrostatic discharge unit; The voltage applied to the input end of the touch line electrostatic discharge unit is greater than or equal to the discharge voltage threshold, so that the input end and the output end of the data line electrostatic discharge unit are turned on; and, in response to the voltage at the input end of the data line electrostatic discharge unit being less than the discharge voltage threshold, the conduction between the input end and the output end of the data line electrostatic discharge unit is disconnected; wherein the touch line electrostatic discharge unit is configured to: in response to the voltage applied to the input end of the touch line electrostatic discharge unit being greater than or equal to the discharge voltage threshold, so that the input end and the output end of the touch line electrostatic discharge unit are turned on; and, in response to the voltage at the input end of the touch line electrostatic discharge unit being less than the discharge voltage threshold, the conduction between the input end and the output end of the touch line electrostatic discharge unit is disconnected.

[0006] According to some exemplary embodiments, the data line electrostatic discharge conductor is electrically connected to the input end of the redundant data line electrostatic discharge unit, and the output end of the redundant data line electrostatic discharge unit is electrically connected to the common voltage line in the peripheral area; and / or, the touch line electrostatic discharge conductor is electrically connected to the input end of the redundant touch line electrostatic discharge unit, and the output end of the redundant touch line electrostatic discharge unit is also electrically connected to the common voltage line.

[0007] According to some exemplary embodiments, a plurality of data line electrostatic discharge units are arranged in a row, and a plurality of touch line electrostatic discharge units are arranged in another row arranged in parallel with the row formed by the plurality of data line electrostatic discharge units.

[0008] According to some exemplary embodiments, the touch display panel also includes a plurality of chips arranged in the peripheral area and a common voltage line arranged at a middle position between two adjacent chips. For the common voltage line: the data line electrostatic discharge conductor includes a first side data line electrostatic discharge conductor located on a first side of the common voltage line and a second side data line electrostatic discharge conductor located on a second side of the common voltage line opposite to the first side, and the first side data line electrostatic discharge conductor and the second side data line electrostatic discharge conductor are electrically connected through vias and jumpers; the touch line electrostatic discharge conductor includes a first side touch line electrostatic discharge conductor located on the first side of the common voltage line and a second side touch line electrostatic discharge conductor located on the second side of the common voltage line opposite to the first side, and the first side touch line electrostatic discharge conductor and the second side touch line electrostatic discharge conductor are electrically connected through vias and jumpers.

[0009] According to some exemplary embodiments, for the common voltage routing: the first-side data line electrostatic discharge conductor is electrically connected to the input end of the first-side redundant data line electrostatic discharge unit, and the output end of the first-side redundant data line electrostatic discharge unit is electrically connected to the common voltage routing; the second-side data line electrostatic discharge conductor is electrically connected to the input end of the second-side redundant data line electrostatic discharge unit, and the output end of the second-side redundant data line electrostatic discharge unit is electrically connected to the common voltage routing; the first-side touch line electrostatic discharge conductor is electrically connected to the input end of the first-side redundant touch line electrostatic discharge unit, and the output end of the first-side redundant touch line electrostatic discharge unit is electrically connected to the common voltage routing; the second-side touch line electrostatic discharge conductor is electrically connected to the input end of the second-side redundant touch line electrostatic discharge unit, and the output end of the second-side redundant touch line electrostatic discharge unit is electrically connected to the common voltage routing.

[0010] According to some exemplary embodiments, for the common voltage routing: on a first side of the common voltage routing, a plurality of data line electrostatic discharge units are arranged into a first row, a plurality of touch line electrostatic discharge units are arranged into a second row, and the first row and the second row are arranged in parallel; on a second side of the common voltage routing, a plurality of data line electrostatic discharge units are arranged into a first row, a plurality of touch line electrostatic discharge units are arranged into a second row, and the first row and the second row are arranged in parallel.

[0011] According to some exemplary embodiments, the touch wire electrostatic discharge conductor is electrically connected to a ground wire.

[0012] According to some exemplary embodiments, a plurality of data line electrostatic discharge units are arranged in a first row, a plurality of touch line electrostatic discharge units are arranged in a second row, the first row and the second row are arranged in parallel, and the touch line electrostatic discharge conductor is electrically connected to the ground line.

[0013] According to some example embodiments, a plurality of data line electrostatic discharge units and a plurality of touch line electrostatic discharge units are arranged in a row, and the touch line electrostatic discharge conductor is electrically connected to a ground line.

[0014] According to some exemplary embodiments, the data line electrostatic discharge conductor is electrically connected to the input end of an additional data line electrostatic discharge unit, and the output end of the additional data line electrostatic discharge unit is electrically connected to the common voltage routing in the peripheral area; the touch line electrostatic discharge conductor is electrically connected to the input end of an additional touch line electrostatic discharge unit, and the output end of the additional touch line electrostatic discharge unit is electrically connected to the common voltage routing in the peripheral area.

[0015] According to some example embodiments, the data line electrostatic discharge conductor is electrically connected to a data line test line.

[0016] According to some exemplary embodiments, the touch display panel also includes a plurality of chips arranged in the peripheral area, and the ground pins of two adjacent chips are electrically connected through a ground wire located between them, the ground wire is located on the side of the chip close to the control area, and the orthographic projection of the ground wire in the touch display panel at least partially overlaps with the orthographic projection of the black matrix of the touch display panel in the touch display panel.

[0017] According to some exemplary embodiments, an orthographic projection of the common voltage trace in the peripheral area in the touch display panel at least partially overlaps with an orthographic projection of the black matrix in the touch display panel.

[0018] According to some exemplary embodiments, the peripheral area includes a terminal interface side area and a terminal interface opposite side area opposite to the terminal interface side area, at least one chip is arranged in the terminal interface side area, and the data line electrostatic discharge unit and the touch line electrostatic discharge unit are arranged in the terminal interface opposite side area; wherein, the multiple data lines and the multiple touch lines extend from the control area to the terminal interface side area and are electrically connected to the at least one chip, and the multiple data lines and the multiple touch lines also extend from the control area to the terminal interface opposite side area and are electrically connected to the corresponding data line electrostatic discharge units and the corresponding touch line electrostatic discharge units respectively.

[0019] According to some exemplary embodiments, the peripheral area includes a terminal interface side area and a terminal interface opposite side area opposite to the terminal interface side area, and at least one chip and the data line electrostatic discharge unit and the touch line electrostatic discharge unit are arranged in the terminal interface side area; wherein the multiple data lines and the multiple touch lines extend from the control area to the terminal interface side area and are electrically connected to the at least one chip, and are respectively electrically connected to the corresponding data line electrostatic discharge unit and the corresponding touch line electrostatic discharge unit.

[0020] According to some exemplary embodiments, the peripheral area includes a terminal interface side area and a terminal interface opposite side area opposite to the terminal interface side area, at least one chip is arranged in the terminal interface side area, and the terminal interface side area and the terminal interface opposite side area are both provided with the data line electrostatic discharge unit and the touch line electrostatic discharge unit; wherein, the multiple data lines and the multiple touch lines extend from the control area to the terminal interface side area and are electrically connected to the at least one chip, and are respectively electrically connected to the corresponding data line electrostatic discharge unit and the corresponding touch line electrostatic discharge unit; wherein, the multiple data lines and the multiple touch lines also extend from the control area to the terminal interface opposite side area and are respectively electrically connected to the corresponding data line electrostatic discharge unit and the corresponding touch line electrostatic discharge unit.

[0021] According to some exemplary embodiments, the peripheral area includes a terminal interface side area and a terminal interface opposite side area opposite to the terminal interface side area, at least one chip is arranged in the terminal interface side area, and at least one chip is also arranged in the terminal interface opposite side area, and the terminal interface side area and the terminal interface opposite side area are both provided with the data line electrostatic discharge unit and the touch line electrostatic discharge unit; wherein, the multiple data lines and the multiple touch lines extend from the control area to the terminal interface side area and are electrically connected to at least one chip in the terminal interface side area, and are respectively electrically connected to the corresponding data line electrostatic discharge unit and the corresponding touch line electrostatic discharge unit in the terminal interface side area; wherein, the multiple data lines and the multiple touch lines also extend from the control area to the terminal interface opposite side area and are electrically connected to at least one chip in the terminal interface opposite side area, and are respectively electrically connected to the corresponding data line electrostatic discharge unit and the corresponding touch line electrostatic discharge unit in the terminal interface opposite side area.

[0022] According to some exemplary embodiments, the circuit structure of the data line electrostatic discharge unit and the touch line electrostatic discharge unit includes: a first transistor, whose control electrode and first electrode are both electrically connected to the input end; a second transistor, whose first electrode is electrically connected to the control electrode of the first transistor, and its control electrode and second electrode are electrically connected to the second electrode of the first transistor; a third transistor, whose first electrode and control electrode are both electrically connected to the second electrode of the second transistor; and a fourth transistor, whose first electrode is electrically connected to the control electrode of the third transistor, its control electrode and second electrode are electrically connected to the second electrode of the third transistor and also electrically connected to the output end; wherein, the first transistor, the second transistor, the third transistor, and the fourth transistor are N-type transistors.

[0023] According to some example embodiments, the first transistor, the second transistor, the third transistor, and the fourth transistor are thin film transistors.

[0024] According to a second aspect of the present disclosure, an electronic device is provided, which includes the touch display panel according to the first aspect of the present disclosure and each exemplary embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Hereinafter, various exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings; in the accompanying drawings:

[0026] 1a and 1b schematically illustrate a touch display panel according to various exemplary embodiments of the present disclosure;

[0027] FIG2 schematically shows an electrostatic discharge arrangement according to an exemplary embodiment of the present disclosure, which can be applied to a touch display panel according to the present disclosure;

[0028] FIG3 schematically shows a circuit structure of an electrostatic discharge unit according to an exemplary embodiment of the present disclosure;

[0029] FIG4 schematically shows an electrostatic discharge arrangement according to another exemplary embodiment of the present disclosure, which can be applied to the touch display panel according to the present disclosure;

[0030] FIG5 schematically shows an electrostatic discharge arrangement according to another exemplary embodiment of the present disclosure, which can be applied to the touch display panel according to the present disclosure;

[0031] FIG6 schematically shows an electrostatic discharge arrangement according to another exemplary embodiment of the present disclosure, which can be applied to the touch display panel according to the present disclosure;

[0032] FIG7 schematically shows an electrostatic discharge arrangement according to another exemplary embodiment of the present disclosure, which can be applied to the touch display panel according to the present disclosure;

[0033] FIG8 schematically shows an electrostatic discharge arrangement according to another exemplary embodiment of the present disclosure, which can be applied to the touch display panel according to the present disclosure;

[0034] 9a and 9b schematically illustrate the application of an electrostatic discharge arrangement in a touch display panel according to various exemplary embodiments of the present disclosure;

[0035] FIG10 schematically shows the connection between the chip and the electrostatic discharge unit and the signal lines when the chip and the electrostatic discharge unit are located in the same area of ​​the touch display panel;

[0036] FIG11 schematically shows a structure of an electronic device according to an exemplary embodiment of the present disclosure in the form of a block diagram.

[0037] It should be understood that the accompanying drawings are merely schematic illustrations of exemplary embodiments of the present disclosure and are not intended to limit the present disclosure and are not necessarily drawn to scale. In addition, in the accompanying drawings, identical or similar features are indicated by identical or similar reference numerals. DETAILED DESCRIPTION

[0038] Various exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings so that those skilled in the art can fully understand and implement the technical solutions according to the present disclosure.

[0039] Refer to Figures 1a and 1b, which schematically illustrate touch display panels according to various exemplary embodiments of the present disclosure. As shown in Figure 1a, the touch display panel 100a includes a control area 110 and a peripheral area 120 surrounding the control area 110. The control area 110 (hereinafter also referred to as the AA area) can be configured to: display content and sense the user's touch operation. The peripheral area 120 surrounds the control area 110 and includes a terminal interface side area 120a (hereinafter also referred to as the DP side area) and a terminal interface opposite side area 120b (hereinafter also referred to as the DPO side area) opposite to the DP side area 120a. In the DP side area 120a, the touch display panel 100 can be provided with at least one chip 130, such as a chip on film (ie COF, full name Chip on Film) or a chip on glass (ie COG, full name Chip on Glass). A plurality of data lines and touch lines (not shown in FIG1a ) extend from the AA area 110 of the touch display panel 100a to the DP side area 120a and / or the DPO side area 120b. Therefore, the touch display panel 100a shown in FIG1a is a unilaterally driven touch display panel. As shown in FIG1b , the structure of the touch display panel 100b is substantially the same as the touch display panel 100a shown in FIG1a , except that at least one chip 130 (which may be a COF or COG) is also provided in the DPO side area 120b of the touch display panel 100b, and a plurality of data lines and touch lines (not shown in FIG1b ) extend from the AA area 110 of the touch display panel 100b to the DP side area 120a and the DPO side area 120b. In addition, the chips 130 in the DPO side region 120b can be arranged to be aligned with the chips 130 in the DP side region 120a, or can be arranged to be staggered with the chips 130 in the DP side region 120a. Therefore, the touch display panel 100a shown in FIG1b is a double-sided driven touch display panel.

[0040] Referring to FIG2 , which schematically illustrates an electrostatic discharge arrangement applicable to the touch display panel shown in FIG1 , according to an exemplary embodiment of the present disclosure. As shown in FIG2 , in this electrostatic discharge arrangement, multiple data lines (DataLine) and multiple touch lines (TxLine) extend from the AA area 110 to the peripheral area 120 . Each data line (DataLine) is electrically connected to the input terminal (IN) of an electrostatic discharge unit (ESD), the output terminal (OT) of which is electrically connected to the data line electrostatic discharge conductor (ESDLine1). Furthermore, each touch line (TxLine) is electrically connected to the input terminal (IN) of another electrostatic discharge unit (ESD), the output terminal (OT) of which is electrically connected to the touch line electrostatic discharge conductor (ESDLine2). Therefore, in the electrostatic discharge arrangement shown in FIG2 , the electrostatic discharge units (ESD) disposed in the peripheral area 120 are divided into two groups: a data line electrostatic discharge unit group (DataLine-ESD Group) and a touch line electrostatic discharge unit group (TxLine-ESD Group). Each ESD unit (ESD) in the DataLine-ESD Group is connected between a corresponding DataLine and a data-line ESD conductor (ESDLine1). Each ESD unit (ESD) in the TouchLine-ESD Group is connected between a corresponding TouchLine (TxLine) and a touch-line ESD conductor (ESDLine2). The ESD units (ESD) are configured to: in response to a voltage applied to the input terminal IN being greater than or equal to a discharge threshold voltage, connect the input terminal IN and the output terminal OT; and in response to the voltage at the input terminal IN being less than the discharge threshold voltage, disconnect the input terminal IN from the output terminal OT.

[0041] The data line electrostatic discharge conductor ESDLine1 and the touch line electrostatic discharge conductor ESDLine2 are configured to have sufficient length and width so that they have sufficient capacity to accommodate the charge transferred from the corresponding data line DataLine and / or touch line TxLine. In addition, as shown in Figure 2, the data line electrostatic discharge conductor ESDLine1 can also be electrically connected to the data line test line ADD provided in the peripheral area 120 of the touch display panel, for example, through a via and a jumper J-Line1. This not only improves the anti-static capability of the data line, but also allows the data line DataLine to be tested via the data line electrostatic discharge conductor ESDLine1 using the data line test line ADD. In Figure 2, the data line electrostatic discharge unit group DataLine-ESD Group and the touch line electrostatic discharge unit group TxLine-ESD Group are shown as being arranged in two rows. However, this is not required. In other exemplary embodiments, the data line electrostatic discharge unit group DataLine-ESD Group and the touch line electrostatic discharge unit group TxLine-ESD Group can also be arranged in a single row, which will be described in detail below.

[0042] Referring to Figure 3, it schematically shows the circuit structure of an electrostatic discharge unit according to an exemplary embodiment of the present disclosure. As shown in Figure 3, the electrostatic discharge unit ESD includes four N-type transistors. It should be noted that the transistors used in this exemplary embodiment of the present disclosure can be thin-film transistors or field-effect transistors or other devices with the same characteristics. Each transistor is typically made so that its source and drain can be used interchangeably, so there is no substantial difference in the description of the connection relationship between its source and drain. In the exemplary embodiment of the present disclosure, in order to distinguish the source and drain of the transistor, one of the electrodes is called the first electrode, the other electrode is called the second electrode, and its gate is called the control electrode. The first electrode and control electrode of the first transistor T1 are electrically connected to the input terminal IN, and its second electrode is electrically connected to the node N1. The first electrode of the second transistor T2 is electrically connected to the input terminal IN, and its control electrode and second electrode are electrically connected to the node N1. The first electrode and control electrode of the third transistor T3 are electrically connected to the node N1, and its second electrode is electrically connected to the output terminal OT. A first electrode of the fourth transistor T4 is electrically connected to the node N1 , and a control electrode and a second electrode thereof are electrically connected to the output terminal OT.

[0043] Therefore, when the voltage applied to the input terminal IN of the electrostatic discharge unit ESD is greater than or equal to the discharge voltage threshold, the first transistor T1 is turned on, so that the voltage at the input terminal IN is also applied to the node N1, and therefore, the second transistor T2 and the third transistor T3 are also turned on, so that the input terminal IN and the output terminal OT are turned on, and at this time, the fourth transistor T4 is also turned on. When the voltage applied to the input terminal IN of the electrostatic discharge unit ESD is less than the discharge voltage threshold, each transistor will be in the off state, thereby disconnecting the conduction between the input terminal IN and the output terminal OT of the electrostatic discharge unit ESD. In addition, the circuit structure of the electrostatic discharge unit ESD shown in Figure 3 is symmetrical, that is, when the input voltage is applied to the output terminal OT and the input terminal IN of the electrostatic discharge unit ESD is used as the output terminal of the electrostatic discharge unit ESD, the electrostatic discharge unit ESD can also achieve the same function. It should be understood that the circuit structure of the electrostatic discharge unit ESD shown in Figure 3 is exemplary and not restrictive. The present disclosure does not impose any restrictions on the circuit structure of the electrostatic discharge unit ESD, as long as it can achieve the function of the electrostatic discharge unit described in the present disclosure.

[0044] From the above description, it can be seen that by grouping the electrostatic discharge units used for data lines and touch lines in the touch display panel, not only can the electrostatic charges accumulated on the data lines and touch lines in the touch display panel be eliminated and the discharge capacity of electrostatic charges be increased, thereby improving the anti-static ability of the touch display panel, but also the mutual interference of voltages between the data lines and the touch lines can be avoided, thereby ensuring the respective defective detection rates of the data lines and the touch lines when they are tested.

[0045] Referring to FIG. 4 , which schematically illustrates an electrostatic discharge arrangement applicable to the touch display panel shown in FIG. 1 , according to another exemplary embodiment of the present disclosure. The electrostatic discharge arrangement shown in FIG. 4 is substantially the same as that shown in FIG. 2 , with only a few minor changes. Therefore, the following description will focus on the differences between the electrostatic discharge arrangement shown in FIG. 4 and FIG. 2 , while the common features will not be reiterated.

[0046] As shown in Figure 4 , in this ESD arrangement, the data line ESD conductor ESDLine1 is electrically connected to the input terminal IN of an ESD unit ESD1, and the output terminal OT of the ESD unit ESD1 is electrically connected to the common voltage line VCOM in the peripheral area 120. The touch line ESD conductor ESDLine2 is also electrically connected to the input terminal IN of an ESD unit ESD2, and the output terminal OT of the ESD unit ESD2 is also electrically connected to the common voltage line VCOM in the peripheral area 120. In a touch display panel, the common voltage line VCOM is generally a large network of lines arranged around the AA area 110 throughout the peripheral area 120. Therefore, the ESD arrangement shown in Figure 4 ensures that even in the case of high electrostatic voltage, the large common voltage line VCOM can be used to divide the voltage and transfer charge, thereby achieving more effective ESD protection for the data line DataLine and the touch line TxLine. Furthermore, in the ESD arrangement shown in FIG4 , the data line test line ADD, electrically connected to the data line ESD conductor ESDLine1, is electrically connected to the common voltage line VCOM via two series-connected ESD units ESD3. This arrangement is intended to ensure that, in the event of high electrostatic voltage, the large common voltage line VCOM can be utilized to divide the voltage and transfer charge, further enhancing ESD protection for the data line DataLine. However, in other exemplary embodiments, the data line test line ADD may also be arranged to be electrically connected to the data line ESD conductor ESDLine1, but not directly electrically connected to the common voltage line VCOM.

[0047] Referring to FIG. 5 , which schematically illustrates an electrostatic discharge arrangement applicable to the touch display panel shown in FIG. 1 , according to yet another exemplary embodiment of the present disclosure. The electrostatic discharge arrangement shown in FIG. 5 is substantially the same as that shown in FIG. 4 , with only a few minor changes. Therefore, the following description will focus on the differences between the electrostatic discharge arrangement shown in FIG. 5 and FIG. 4 , while the common features will not be reiterated.

[0048] As shown in FIG5 , in this electrostatic discharge arrangement, the touch line electrostatic discharge conductor ESDLine2 is electrically connected to the ground line GND, for example, through a via and a jumper J-Line2. Therefore, in the electrostatic discharge arrangement shown in FIG5 , when performing array detection on the touch display panel, the ground line GND can be used as a pressure signal line to apply a test voltage signal to test the defective rate of the touch line TxLine, and after the array detection is completed, the ground line GND can still be used as a ground line. It can be seen that the electrostatic discharge arrangement shown in FIG5 can, on the one hand, improve the defective detection rate of the touch line TxLine, and on the other hand, by electrically connecting the touch line electrostatic discharge conductor ESDLine2 to the ground line GND, the ground line network can be used to divide the voltage and transfer the charge, thereby improving the electrostatic protection of the data line DataLine.

[0049] Referring to FIG. 6 , which schematically illustrates an electrostatic discharge arrangement applicable to the touch display panel shown in FIG. 1 , according to another exemplary embodiment of the present disclosure. As shown in FIG. 6 , the electrostatic discharge arrangement can be disposed between two adjacent chips 130 in the peripheral region 120 of the touch display panel. In this electrostatic discharge arrangement, a common voltage trace VCOM is disposed between the two adjacent chips 130. For the multiple data lines DataLine and multiple touch lines TxLine located on a first side of the common voltage trace VCOM, each data line DataLine is electrically connected to the input terminal IN of an electrostatic discharge unit ESD, and the output terminal OT of the electrostatic discharge unit ESD is electrically connected to the first-side data line electrostatic discharge conductor ESDLine1-L. Furthermore, each touch line TxLine is also electrically connected to the input terminal IN of an electrostatic discharge unit ESD1-2, and the output terminal OT of the electrostatic discharge unit ESD is electrically connected to the first-side touch line electrostatic discharge conductor ESDLine2-L. For the multiple data lines DataLine and multiple touch lines TxLine located on the second side of the common voltage line VCOM, each data line DataLine is electrically connected to the input terminal IN of an ESD unit ESD, and the output terminal OT of the ESD unit ESD is electrically connected to the second-side data line ESD conductor ESDLine1-R. Each touch line TxLine is also electrically connected to the input terminal IN of an ESD unit ESD, and the output terminal OT of the ESD unit ESD is electrically connected to the second-side touch line ESD conductor ESDLine2-R. The first-side data line ESD conductor ESDLine1-L is electrically connected to the input terminal IN of an ESD unit ESD1-1, and the output terminal OT of the ESD unit ESD1-1 is electrically connected to the common voltage line VCOM. The first-side touch line ESD conductor ESDLine2-L is also electrically connected to the input terminal IN of an ESD unit ESD1-2, and the output terminal OT of the ESD unit ESD1-2 is also electrically connected to the common voltage line VCOM. The second-side data line electrostatic discharge conductor ESDLine1-R is electrically connected to the input terminal IN of an electrostatic discharge unit ESD2-1, and the output terminal OT of the electrostatic discharge unit ESD2-1 is electrically connected to the common voltage line VCOM; the second-side touch line electrostatic discharge conductor ESDLine2-R is also electrically connected to the input terminal IN of an electrostatic discharge unit ESD2-2, and the output terminal OT of the electrostatic discharge unit ESD2-2 is also electrically connected to the common voltage line VCOM.The first-side data line ESD conductor ESDLine1-L is electrically connected to the second-side data line ESDLine1-R through corresponding vias and jumpers. The first-side touch line ESD conductor ESDLine2-L is also electrically connected to the second-side touch line ESD conductor ESDLine2-R through corresponding vias and jumpers. On each side of the common voltage trace VCOM, the ESD cells (ESD) electrically connected to the data lines DataLine and the ESD cells (ESD) electrically connected to the touch lines TxLine are shown arranged in two rows.

[0050] Therefore, the electrostatic discharge arrangement shown in Figure 6, on the one hand, improves the electrostatic protection of the data lines and touch lines by arranging the electrostatic discharge units ESD in double rows and utilizing the common voltage trace VCOM to improve voltage division and charge transfer. On the other hand, the first and second side data line electrostatic discharge conductors and the first and second side touch line electrostatic discharge conductors on both sides of the common voltage trace VCOM are electrically connected across the common voltage trace through vias and jumpers, respectively. In this way, it is possible to prevent the data line electrostatic discharge conductors and / or the touch line electrostatic discharge conductors from accumulating a large amount of electrostatic charge due to being too long, thereby further improving the electrostatic protection of the data lines and touch lines.

[0051] Referring to Figure 7 , which schematically illustrates an ESD arrangement applicable to the touch display panel shown in Figure 1 , according to another exemplary embodiment of the present disclosure. As shown in Figure 7 , multiple data lines (DataLine) and touch lines (TxLine) are electrically connected to the input terminals of corresponding ESD units (ESD). All ESD units (ESD) are arranged in a single row, with the output terminals of the ESD units electrically connected to the data lines (DataLine) being electrically connected to the data line ESD conductor (ESDLine1), and the output terminals of the ESD units electrically connected to the touch lines (TxLine) being electrically connected to the touch line ESD conductor (ESDLine2). Therefore, all ESD units (ESD) are still divided into two groups: a data line ESD unit group and a touch line ESD unit group. The data line ESD conductor (ESDLine1) is divided into multiple segments by the corresponding common voltage trace (VCOM), each segment electrically connected via corresponding vias and jumpers. The touch line ESD conductor (ESDLine2) is also divided into multiple segments by the corresponding common voltage trace (VCOM), each segment electrically connected via corresponding vias and jumpers. The data line electrostatic discharge conductor ESDLine1 and the touch line electrostatic discharge conductor ESDLine2 are each electrically connected to the common voltage line VCOM through a corresponding electrostatic discharge unit ESD. Furthermore, the data line electrostatic discharge conductor ESDLine1 is also electrically connected to the data line test line ADD through corresponding vias and jumpers, and the touch line electrostatic discharge conductor ESDLine2 is also electrically connected to the ground line GND through corresponding vias and jumpers.

[0052] It can be seen that the electrostatic discharge arrangement shown in FIG. 7 has the advantages of the electrostatic discharge arrangements shown in FIG. 2 , FIG. 4 , FIG. 5 , and FIG. 6 , while also taking into account the narrowing of the frame of the touch display panel.

[0053] Refer to Figure 8, which schematically shows an electrostatic discharge arrangement according to another exemplary embodiment of the present disclosure that can be applied to the touch display panel shown in Figure 1. As shown in Figure 8, in this electrostatic discharge arrangement, a ground pin GND-Pin is added to the side of each chip 130 close to the AA area. The pins GND-Pin of these chips are electrically connected to the ground line GND through the connection line ConnectionLine, and the ground line GND is at least partially covered by the black matrix on the color film side of the touch display panel (Figure 8 schematically shows the projection BM of the black matrix on the color film side on the touch display panel) (that is, the positive projection of the ground line in the touch display panel and the positive projection of the black matrix of the touch display panel in the touch display panel at least partially overlap), thereby forming a capacitor with the black matrix. The wires of the electrodes Electrode of the touch sensor in the touch display panel 110 are also covered by the black matrix on the color film side, thereby also forming a capacitor with the black matrix. These two capacitors form a parallel capacitor. Therefore, when the touch display panel 110 accumulates a large amount of electrostatic charge due to touch operation and friction, the charge can be released from the electrode Electrode to the ground line through the parallel capacitor, thereby further improving the electrostatic protection of the touch display panel. In addition, as shown in Figure 8, the positive projection of the common voltage line VCOM in the touch display panel also overlaps at least partially with the positive projection of the black matrix on the color filter side in the touch display panel, thereby also forming a capacitor with the black matrix. The capacitor can also be used to transfer the electrostatic charge accumulated on the electrode Electrode, thereby improving the electrostatic protection of the touch display panel.

[0054] 9 a and 9 b , which schematically illustrate the application of an electrostatic discharge arrangement in a touch display panel according to various exemplary embodiments of the present disclosure.

[0055] The touch display panel shown in FIG9a is identical to the touch display panel 100a shown in FIG1a , wherein the chip 130 is arranged in the DP side region 120a. The figure shows four chips 130 arranged in the DP side region 120a, but this is merely exemplary and not restrictive. Any suitable number of chips may be arranged in the DP side region 120a as needed. In some exemplary embodiments, an electrostatic discharge unit may be arranged in the DP side region 120a. Specifically, the electrostatic discharge unit can be applied to area Zone 1 in the touch display panel 100a according to the electrostatic discharge arrangement shown in Figures 2, 4, and 5, which is located at both ends of the DP side area 120a of the touch display panel 100a; the electrostatic discharge unit can also be applied to area Zone 2 in the touch display panel 100a according to the electrostatic discharge arrangement shown in Figure 6, which is located between two adjacent chips 130 in the DP side area 120a of the touch display panel 100a; the electrostatic discharge unit can also be applied to the entire DP side area 120a of the touch display panel 100a according to the electrostatic discharge arrangement shown in Figure 7; in addition, the electrostatic discharge arrangement shown in Figure 8 can be applied to area Zone 2 of the touch display panel 100a, which is located between two adjacent chips 130 in the DP side area 120a. Therefore, in the above situation, multiple data lines and multiple touch lines extend from the control area 110 of the touch display panel 100a to the DP side area 120a and are electrically connected to the chip 130, and the multiple data lines and multiple touch lines are also electrically connected to the corresponding electrostatic discharge units in the DP side area 120a.

[0056] In some exemplary embodiments, an electrostatic discharge unit may be provided in the DPO side region 120b. Specifically, the electrostatic discharge unit may be applied to the DPO side region 120b of the touch display panel 100a according to the electrostatic discharge arrangement shown in Figures 2, 4, 5, and 7. Therefore, in this case, a plurality of data lines and a plurality of touch lines extend from the AA region 110 of the touch display panel 100a to the DP side region 120a and are electrically connected to the chip 130, and a plurality of data lines and a plurality of touch lines also extend from the AA region 110 to the DPO side region 120b and are respectively electrically connected to corresponding electrostatic discharge units.

[0057] In some exemplary embodiments, a portion of the electrostatic discharge units may be provided in the DP side region 120a, while another portion of the electrostatic discharge units may be provided in the DPO side region 120b. Specifically, the electrostatic discharge units may be applied to the DP side region 120a and the DPO side region 120b of the touch display panel 100a according to the electrostatic discharge arrangement shown in Figures 2, 4, 5, and 7. Therefore, in this case, a plurality of data lines and a plurality of touch lines extend from the AA region 110 to the DP side region 120a to be electrically connected to the chip 130, and are respectively electrically connected to the corresponding electrostatic discharge units, and a plurality of data lines and a plurality of touch lines also extend from the AA region 110 to the DPO side region 120b to be electrically connected to the corresponding electrostatic discharge units.

[0058] The touch display panel shown in FIG9b is the same as the touch display panel 100b shown in FIG1b, wherein the chips 130 are arranged in the DP side region 120a and the DPO side region 120b. The figure shows eight chips 130 arranged in the DP side region 120a and the DPO side region 120b, but this is merely exemplary and not restrictive. According to actual needs, any suitable number of chips can be arranged in the DP side region 120a and the DPO side region 120b, respectively. In some exemplary embodiments, an electrostatic discharge unit can be arranged in the DP side region 120a and the DPO side region 120b. Specifically, the electrostatic discharge unit can be applied to the area Zone1 and / or the area Zone3 in the touch display panel 100b according to the electrostatic discharge arrangement shown in Figures 2, 4, and 5. The area Zone1 is located at both ends of the DP side area 120a of the touch display panel 100b, and the area Zone3 is located at both ends of the DPO side area 120b of the touch display panel 100b. The electrostatic discharge unit can also be applied to the area Zone2 and / or the area Zone4 in the touch display panel 100b according to the electrostatic discharge arrangement shown in Figure 6. The area Zone ne2 is located between two adjacent chips 130 in the DP side area 120a of the touch display panel 100b, and area Zone4 is located between two adjacent chips 130 in the DPO side area 120b of the touch display panel 100b; the electrostatic discharge unit can also be applied to the entire DP side area 120a and the entire DPO side area 120b of the touch display panel 100b according to the electrostatic discharge arrangement shown in Figure 7; in addition, the electrostatic discharge arrangement shown in Figure 8 can be applied to area Zone2 and / or area Zone4 of the touch display panel 100b. Therefore, in the above situation, multiple data lines and multiple touch lines extend from the AA area 110 of the touch display panel 100b to the DP side area 120a, are electrically connected to the chip 130 in the DP side area 120a, and are respectively electrically connected to the corresponding electrostatic discharge units in the DP side area 120a. In addition, multiple data lines and multiple touch lines also extend from the AA area 110 to the DPO side area 120b, are electrically connected to the chip 130 in the DPO side area 120b, and are respectively electrically connected to the corresponding electrostatic discharge units in the DPO side area 120b.

[0059] It should be understood that the various exemplary electrostatic discharge arrangements shown in Figures 2 and 4 to 8 can be applied to the touch display panel individually or in any suitable combination, as long as such application does not violate technical principles, and the present disclosure does not limit this.

[0060] Referring to FIG. 10 , it schematically illustrates the connection of the chip 130 and the electrostatic discharge unit (ESD) to the signal lines when the chip and the electrostatic discharge unit are located in the same area of ​​the touch display panel. As shown in FIG. 10 , the chip 130 and the electrostatic discharge unit (ESD) are located in the same area of ​​the touch display panel, for example, both located in the DP side area 120a or both located in the DPO side area 120b. The data line (DataLine) extends into this area and is electrically connected to the corresponding pin in the chip 130. The data line (DataLine) includes a branch line (BranchLine), which is electrically connected to the input terminal (IN) of the electrostatic discharge unit (ESD), and the output terminal (OT) of the electrostatic discharge unit (ESD) is electrically connected to the data line electrostatic discharge conductor (ESDLine1). Thus, the data line (DataLine) is electrically connected to the chip 130 and the electrostatic discharge unit (ESD), respectively. FIG. 10 exemplarily illustrates the case where the data line is electrically connected to the chip and the electrostatic discharge unit, respectively. It should be understood that the case where the touch line is electrically connected to the chip and the electrostatic discharge unit, respectively, is similar to the case shown in FIG.

[0061] Referring to FIG11 , a block diagram schematically illustrates the structure of an electronic device according to an exemplary embodiment of the present disclosure. As shown in FIG11 , the electronic device 300 includes a touch display panel 310, wherein the touch display panel 310 can be implemented as a touch display panel to which an electrostatic discharge arrangement according to each exemplary embodiment of the present disclosure is applied, as shown in FIG9 . It should be understood that the electronic device 300 can be any type of suitable electronic device, such as, but not limited to, a smartphone, a mobile computer, a notebook computer, a tablet computer, and wearable devices such as smart watches and wristbands. The present disclosure does not limit the specific type of electronic device, as long as it includes a touch display panel.

[0062] The terms used in this disclosure are only used to describe the embodiments in this disclosure and are not intended to limit this disclosure. As used in this disclosure, the singular forms "a", "an" and "the" are intended to also include the plural forms, unless the context clearly indicates otherwise. It is also to be understood that the terms "include" and "comprise" when used in this disclosure refer to the presence of the features mentioned, but do not exclude the presence of one or more other features or the addition of one or more other features. As used in this disclosure, the term "and / or" includes any and all combinations of one or more of the associated listed items. It will be understood that although the terms "first", "second", "third" etc. can be used to describe various features in this disclosure, these features should not be limited by these terms. These terms are only used to distinguish one feature from another.

[0063] Unless otherwise defined, all terms (including technical and scientific terms) used in this disclosure have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs. It is also understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art and / or the context of this specification, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this disclosure.

[0064] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction and without violating technical principles, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, or may omit some technical features from the different embodiments or examples described in this specification, and the embodiments or examples obtained based on such combination, combination or omission are also considered to fall within the scope of the present disclosure.

[0065] Although the present disclosure has been described in detail in conjunction with certain exemplary embodiments, it is not to be limited to the specific forms described in this disclosure. Rather, the scope of the present disclosure is limited only by the appended claims.

Claims

1. A touch display panel, comprising: A control area configured to display and sense a user's touch operation; a peripheral area surrounding the control area; A plurality of data lines and a plurality of touch lines extending from the control area to the peripheral area, wherein in the peripheral area, each data line is electrically connected to an input end of a data line electrostatic discharge unit, an output end of the data line electrostatic discharge unit is electrically connected to a data line electrostatic discharge conductor, each touch line is electrically connected to an input end of the touch line electrostatic discharge unit, and an output end of the touch line electrostatic discharge unit is electrically connected to the touch line electrostatic discharge conductor; The data line electrostatic discharge unit is configured to: in response to a voltage applied at the input end of the data line electrostatic discharge unit being greater than or equal to a discharge voltage threshold, connect the input end and the output end of the data line electrostatic discharge unit; and in response to a voltage at the input end of the data line electrostatic discharge unit being less than the discharge voltage threshold, disconnect the connection between the input end and the output end of the data line electrostatic discharge unit; The touch line electrostatic discharge unit is configured to: in response to the voltage applied at the input end of the touch line electrostatic discharge unit being greater than or equal to the discharge voltage threshold, connect the input end and the output end of the touch line electrostatic discharge unit; and, in response to the voltage at the input end of the touch line electrostatic discharge unit being less than the discharge voltage threshold, disconnect the conduction between the input end and the output end of the touch line electrostatic discharge unit.

2. The touch display panel according to claim 1, wherein: The data line electrostatic discharge conductor is electrically connected to an input end of a redundant data line electrostatic discharge unit, and an output end of the redundant data line electrostatic discharge unit is electrically connected to a common voltage wiring in the peripheral area; and / or The touch line electrostatic discharge conductor is electrically connected to the input end of the redundant touch line electrostatic discharge unit, and the output end of the redundant touch line electrostatic discharge unit is also electrically connected to the common voltage wiring.

3. The touch display panel according to claim 2, wherein: A plurality of data line electrostatic discharge units are arranged in a first row, and a plurality of touch line electrostatic discharge units are arranged in a second row, and the first row and the second row are arranged in parallel.

4. The touch display panel according to claim 1, wherein: The touch display panel further includes a plurality of chips arranged in the peripheral area and a common voltage wiring arranged at a middle position between two adjacent chips, and for the common voltage wiring: The data line electrostatic discharge conductor comprises a first-side data line electrostatic discharge conductor located on a first side of the common voltage routing line and a second-side data line electrostatic discharge conductor located on a second side of the common voltage routing line opposite to the first side, wherein the first-side data line electrostatic discharge conductor and the second-side data line electrostatic discharge conductor are electrically connected through vias and jumpers; The touch line electrostatic discharge conductor includes a first-side touch line electrostatic discharge conductor located on a first side of the common voltage routing line and a second-side touch line electrostatic discharge conductor located on a second side of the common voltage routing line opposite to the first side, and the first-side touch line electrostatic discharge conductor and the second-side touch line electrostatic discharge conductor are electrically connected through vias and jumpers.

5. The touch display panel according to claim 4, wherein: For the common voltage trace: The first-side data line electrostatic discharge conductor is electrically connected to the input end of the first-side redundant data line electrostatic discharge unit, and the output end of the first-side redundant data line electrostatic discharge unit is electrically connected to the common voltage wiring; The second-side data line electrostatic discharge conductor is electrically connected to the input end of the second-side redundant data line electrostatic discharge unit, and the output end of the second-side redundant data line electrostatic discharge unit is electrically connected to the common voltage wiring; The first-side touch line electrostatic discharge conductor is electrically connected to an input end of a first-side redundant touch line electrostatic discharge unit, and an output end of the first-side redundant touch line electrostatic discharge unit is electrically connected to the common voltage wiring; The second-side touch line electrostatic discharge conductor is electrically connected to an input end of a second-side redundant touch line electrostatic discharge unit, and an output end of the second-side redundant touch line electrostatic discharge unit is electrically connected to the common voltage wiring.

6. The touch display panel according to claim 5, wherein: For the common voltage trace: On a first side of the common voltage wiring, a plurality of data line electrostatic discharge units are arranged in a first row, and a plurality of touch line electrostatic discharge units are arranged in a second row, and the first row and the second row are arranged in parallel; On the second side of the common voltage wiring, a plurality of data line electrostatic discharge units are arranged in a first row, and a plurality of touch line electrostatic discharge units are arranged in a second row, and the first row and the second row are arranged in parallel.

7. The touch display panel according to claim 1, wherein: The touch line electrostatic discharge conductor is electrically connected to the ground line.

8. The touch display panel according to claim 7, wherein: A plurality of data line electrostatic discharge units are arranged in a first row, and a plurality of touch line electrostatic discharge units are arranged in a second row, and the first row and the second row are arranged in parallel.

9. The touch display panel according to claim 7, wherein: A plurality of data line electrostatic discharge units and a plurality of touch line electrostatic discharge units are arranged in a row.

10. The touch display panel according to claim 9, wherein: The data line electrostatic discharge conductor is electrically connected to an input end of an additional data line electrostatic discharge unit, and an output end of the additional data line electrostatic discharge unit is electrically connected to a common voltage wiring in the peripheral area; The touch line electrostatic discharge conductor is electrically connected to an input end of an additional touch line electrostatic discharge unit, and an output end of the additional touch line electrostatic discharge unit is electrically connected to a common voltage wiring in the peripheral area.

11. The touch display panel according to claim 1, wherein: The data line electrostatic discharge conductor is electrically connected to the data line test line.

12. The touch display panel according to claim 1, wherein: The touch display panel also includes a plurality of chips arranged in the peripheral area, and the ground pins of two adjacent chips are electrically connected through a ground wire located between them. The ground wire is located on a side of the chip close to the control area, and the orthographic projection of the ground wire in the touch display panel at least partially overlaps with the orthographic projection of the black matrix of the touch display panel in the touch display panel.

13. The touch display panel according to claim 12, wherein: An orthographic projection of the common voltage wiring in the peripheral area in the touch display panel at least partially overlaps with an orthographic projection of the black matrix in the touch display panel.

14. The touch display panel according to claim 1, wherein: The peripheral area includes a terminal interface side area and a terminal interface opposite side area opposite to the terminal interface side area, at least one chip is arranged in the terminal interface side area, and the data line electrostatic discharge unit and the touch line electrostatic discharge unit are arranged in the terminal interface opposite side area; Among them, the multiple data lines and the multiple touch lines extend from the control area to the terminal interface side area and are electrically connected to the at least one chip, and the multiple data lines and the multiple touch lines also extend from the control area to the opposite side area of ​​the terminal interface and are respectively electrically connected to the corresponding data line electrostatic discharge unit and the corresponding touch line electrostatic discharge unit.

15. The touch display panel according to claim 1, wherein: The peripheral area includes a terminal interface side area and a terminal interface opposite side area opposite to the terminal interface side area, and at least one chip and the data line electrostatic discharge unit and the touch line electrostatic discharge unit are arranged in the terminal interface side area; The plurality of data lines and the plurality of touch lines extend from the control area to the terminal interface side area to be electrically connected to the at least one chip, and are respectively electrically connected to corresponding data line electrostatic discharge units and corresponding touch line electrostatic discharge units.

16. The touch display panel according to claim 1, wherein: The peripheral area includes a terminal interface side area and a terminal interface opposite side area opposite to the terminal interface side area, at least one chip is arranged in the terminal interface side area, and the data line electrostatic discharge unit and the touch line electrostatic discharge unit are arranged in both the terminal interface side area and the terminal interface opposite side area; The plurality of data lines and the plurality of touch lines extend from the control area to the terminal interface side area and are electrically connected to the at least one chip, and are respectively electrically connected to the corresponding data line electrostatic discharge unit and the corresponding touch line electrostatic discharge unit; The plurality of data lines and the plurality of touch lines further extend from the control area to the area on the opposite side of the terminal interface and are respectively electrically connected to the corresponding data line electrostatic discharge unit and the corresponding touch line electrostatic discharge unit.

17. The touch display panel according to claim 1, wherein: The peripheral area includes a terminal interface side area and a terminal interface opposite side area opposite to the terminal interface side area, at least one chip is arranged in the terminal interface side area, at least one chip is also arranged in the terminal interface opposite side area, and the data line electrostatic discharge unit and the touch line electrostatic discharge unit are both arranged in the terminal interface side area and the terminal interface opposite side area; The plurality of data lines and the plurality of touch lines extend from the control area to the terminal interface side area and are electrically connected to at least one chip in the terminal interface side area, and are respectively electrically connected to corresponding data line electrostatic discharge units and corresponding touch line electrostatic discharge units in the terminal interface side area; Among them, the multiple data lines and the multiple touch lines also extend from the control area to the area on the opposite side of the terminal interface and are electrically connected to at least one chip in the area on the opposite side of the terminal interface, and are respectively electrically connected to the corresponding data line electrostatic discharge unit and the corresponding touch line electrostatic discharge unit in the area on the opposite side of the terminal interface.

18. The touch display panel according to claim 1, wherein: The circuit structure of the data line electrostatic discharge unit and the touch line electrostatic discharge unit includes: A first transistor, a control electrode and a first electrode of which are both electrically connected to the input terminal; a second transistor, a first electrode of which is electrically connected to the control electrode of the first transistor, and a control electrode and a second electrode of which are electrically connected to the second electrode of the first transistor; a third transistor, a first electrode and a control electrode of which are both electrically connected to the second electrode of the second transistor; and a fourth transistor, a first electrode of which is electrically connected to the control electrode of the third transistor, a control electrode and a second electrode of which are electrically connected to the second electrode of the third transistor and are also electrically connected to the output terminal; Among them, the first transistor, the second transistor, the third transistor, and the fourth transistor are N-type transistors.

19. The touch display panel according to claim 18, wherein: The first transistor, the second transistor, the third transistor, and the fourth transistor are thin film transistors. 20 . An electronic device comprising the touch display panel according to claim 1 .

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