Display panel and driving method thereof, and display device

Abstract

The embodiment of the present application provides a display panel and a driving method thereof, and a display device, wherein the display panel includes: a touch electrode array, a plurality of touch signal lines, a plurality of auxiliary signal lines, a switch unit, and a first voltage signal terminal; the touch electrode array includes a plurality of columns of touch electrodes arranged in sequence along a first direction, and each column of touch electrodes includes a plurality of touch electrodes; the touch signal lines and the auxiliary signal lines both extend along a second direction, the touch signal lines are electrically connected to the touch electrodes, and the auxiliary signal lines are not electrically connected to the touch electrodes; in a direction perpendicular to the plane where the display panel is located, each auxiliary signal line overlaps with part of the touch electrodes in a corresponding column of touch electrodes, and the first direction intersects with the second direction; the auxiliary signal lines are electrically connected to the first voltage signal terminal through the switch unit. The embodiment of the present application can reduce the load on the touch electrodes and improve the sensitivity of the touch display panel during touch.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and in particular, relates to a display panel and a driving method thereof, and a display device. Background Art

[0002] With the development of display technology, touch display panels (also known as touch screens) are used more and more widely in people's lives. For example, when using touch display panels for common operations such as inputting text or playing games, people hope that the touch display panels can respond quickly to the touch signals of the fingers to improve the user experience.

[0003] However, the inventors of the present application have discovered that the current touch display panels have poor touch sensitivity during touch control, which affects the user experience. Summary of the invention

[0004] Embodiments of the present application provide a display panel and a driving method thereof, and a display device, which can improve the touch sensitivity of a touch display panel during touch control.

[0005] In a first aspect, an embodiment of the present application provides a display panel, which includes: a touch electrode array, multiple touch signal lines, multiple auxiliary signal lines, a switching unit and a first voltage signal terminal; the touch electrode array includes multiple columns of touch electrodes arranged in sequence along a first direction, and each column of touch electrodes includes multiple touch electrodes; the touch signal lines and the auxiliary signal lines both extend along a second direction, the touch signal lines are electrically connected to the touch electrodes, and the auxiliary signal lines are not electrically connected to the touch electrodes; in a direction perpendicular to the plane where the display panel is located, each auxiliary signal line overlaps with part of the touch electrodes in a corresponding column of touch electrodes, and the first direction intersects with the second direction; the auxiliary signal lines are electrically connected to the first voltage signal terminal through the switching unit.

[0006] In a second aspect, an embodiment of the present application provides a method for driving a display panel, wherein the display panel comprises: a touch electrode array, multiple touch signal lines, multiple auxiliary signal lines, a switch unit and a first voltage signal terminal; the touch electrode array comprises multiple columns of touch electrodes arranged in sequence along a first direction, and each column of touch electrodes comprises multiple touch electrodes; the touch signal lines and the auxiliary signal lines both extend along a second direction, the touch signal lines are electrically connected to the touch electrodes, and the auxiliary signal lines are not electrically connected to the touch electrodes; in a direction perpendicular to the plane where the display panel is located, each auxiliary signal line overlaps with part of the touch electrodes in a corresponding column of touch electrodes, and the first direction intersects with the second direction; the auxiliary signal lines are electrically connected to the first voltage signal terminal through the switch unit, and the method comprises: in a touch stage, providing a touch signal to the touch signal line, and controlling the switch unit to turn off.

[0007] In a third aspect, an embodiment of the present application provides a display device, and the display device includes a display panel provided in the first aspect.

[0008] The display panel and its driving method, and the display device of the embodiments of the present application, the display panel includes: a touch electrode array, multiple touch signal lines, multiple auxiliary signal lines, a switch unit and a first voltage signal terminal; the touch electrode array includes multiple columns of touch electrodes arranged in sequence along a first direction, and each column of touch electrodes includes multiple touch electrodes; the touch signal lines and the auxiliary signal lines both extend along a second direction, the touch signal lines are electrically connected to the touch electrodes, and the auxiliary signal lines are not electrically connected to the touch electrodes; in a direction perpendicular to the plane where the display panel is located, each auxiliary signal line overlaps with part of the touch electrodes in a corresponding column of touch electrodes, and the first direction intersects with the second direction; the auxiliary signal lines are electrically connected to the first voltage signal terminal through the switch unit. On the one hand, since the auxiliary signal line is not electrically connected to the touch electrode, the impedance of the auxiliary signal line itself can be avoided from being applied to the touch electrode, thereby reducing the load on the touch electrode; on the other hand, since the auxiliary signal line is not electrically connected to the touch electrode, and during touch, the voltage signal at the first voltage signal end cannot be transmitted to the auxiliary signal line by turning off the switch unit, so not only can the generation of coupling capacitance between the auxiliary signal line and other adjacent signal lines be avoided, but also the coupling capacitance can be avoided from affecting the touch electrode through the auxiliary signal line, thereby further reducing the load on the touch electrode, thereby improving the sensitivity of the touch display panel during touch, and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0010] Figure 1 A schematic diagram of the structure of a display panel;

[0011] Figure 2 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0012] Figure 3 Another schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0013] Figure 4 A schematic diagram of another structure of a display panel provided in an embodiment of the present application;

[0014] Figure 5 A schematic diagram of another structure of a display panel provided in an embodiment of the present application;

[0015] Figure 6 A timing diagram of a display panel provided in an embodiment of the present application;

[0016] Figure 7 A schematic cross-sectional view of a display panel provided in an embodiment of the present application;

[0017] Figure 8 A schematic diagram of a flow chart of a method for driving a display panel provided in an embodiment of the present application;

[0018] Fig. 9 A schematic diagram of the structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0020] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0021] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0022] It should be noted that the transistors in the embodiments of the present application are described by taking N-type transistors as an example, but are not limited to N-type transistors, and can also be replaced by P-type transistors. For N-type transistors, the on-level is a high level and the off-level is a low level. That is, when the gate of the N-type transistor is at a high level, the first pole and the second pole are connected, and when the gate of the N-type transistor is at a low level, the first pole and the second pole are disconnected. For P-type transistors, the on-level is a low level and the off-level is a high level. That is, when the control terminal of the P-type transistor is at a low level, the first pole and the second pole are connected, and when the control terminal of the P-type transistor is at a high level, the first pole and the second pole are disconnected. In a specific implementation, the gate of each of the above-mentioned transistors serves as its control electrode, and, according to the signal of the gate of each transistor and its type, its first electrode can be used as the source and the second electrode as the drain, or its first electrode can be used as the drain and the second electrode as the source, without making any distinction here. In addition, the on-level and off-level in the embodiments of the present invention are both general terms, the on-level refers to any level that can turn on the transistor, and the off-level refers to any level that can turn off / shut down the transistor.

[0023] In the embodiments of the present application, the term “electrically connected” may refer to a direct electrical connection between two components, or may refer to an electrical connection between two components via one or more other components.

[0024] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0025] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the prior art:

[0026] As mentioned above, the inventors of the present application have found that in the related art, there is a problem that the load on the touch electrodes in the touch display panel is large during touch control, and the sensitivity of the touch display panel during touch control is poor.

[0027] In order to solve the above technical problems, the inventors of this application first studied and analyzed the root causes of the above technical problems. The specific research and analysis process is as follows:

[0028] The inventor of this application discovered that Figure 1As shown, the display panel 10' includes a plurality of touch electrodes 101', a touch signal line 102', an auxiliary signal line 103' and a data signal line data'. The touch signal line 102' and the auxiliary signal line 103' are both electrically connected to the touch electrode 101'. The touch signal line 102' is used to send a touch signal sent by a control chip (not shown in the figure) to the touch electrode 101', and transmit a touch sensing signal generated by the touch electrode 101' back to the control chip. During touch control, the touch signal line 102' sends a touch signal to the touch electrode 101'. Since the auxiliary signal line 103' is electrically connected to the touch electrode 101', there will also be a voltage signal on the auxiliary signal line 103', that is, a potential change will occur on the auxiliary signal line 103'. Since the spatial distance between the auxiliary signal line 103' and the data signal line data' is relatively close, a coupling capacitor will be generated between the auxiliary signal line 103' and the data signal line data'. The coupling capacitor is applied to the touch electrode 101 ′ through the auxiliary signal line 103 ′, thereby increasing the load on the touch electrode 101 ′, thereby causing the touch display panel to have poor touch sensitivity.

[0029] In view of the above research findings of the inventors, the embodiments of the present application provide a display panel and its driving method, and a display device, which can solve the technical problems existing in the related art that the load on the touch electrodes in the touch display panel is large during touch control and the sensitivity of the touch display panel is poor during touch control.

[0030] The technical concept of the embodiment of the present application is that the auxiliary signal line is not electrically connected to the touch electrode, and the auxiliary signal line is electrically connected to the first voltage signal end through the switch unit. On the one hand, since the auxiliary signal line is not electrically connected to the touch electrode, it is possible to avoid applying the impedance on the auxiliary signal line itself to the touch electrode, thereby reducing the load on the touch electrode; on the other hand, since the auxiliary signal line is not electrically connected to the touch electrode, and the voltage signal at the first voltage signal end cannot be transmitted to the auxiliary signal line by turning off the switch unit during touch control, it is possible to avoid not only the generation of coupling capacitance between the auxiliary signal line and other adjacent signal lines, but also the coupling capacitance from affecting the touch electrode through the auxiliary signal line, thereby further reducing the load on the touch electrode, thereby improving the sensitivity of the touch display panel during touch control, and enhancing the user experience.

[0031] The following first introduces the display panel provided in the embodiment of the present application.

[0032] Figure 2 A schematic diagram of the structure of a display panel provided in an embodiment of the present application. Figure 2As shown, the display panel 20 provided in the embodiment of the present application includes a touch electrode array 200, a plurality of touch signal lines 201, a plurality of auxiliary signal lines 202, a switch unit 203 and a first voltage signal terminal V1. The touch electrode array 200 includes a plurality of columns of touch electrodes 200a arranged in sequence along a first direction X, and each column of touch electrodes 200a includes a plurality of touch electrodes 200a. The touch signal lines 201 and the auxiliary signal lines 202 both extend along a second direction Y, and the first direction X intersects with the second direction Y. It should be noted that, considering the processing error, there may be a deviation between the extension direction of the touch signal line 201, the extension direction of the auxiliary signal line 202 and the second direction Y, and the embodiment of the present application does not limit this.

[0033] The touch signal line 201 is electrically connected to the touch electrode 200a. For example, the touch signal line 201 can be electrically connected to the touch electrode 200a through a via. The touch signal line 201 is used to send the touch signal sent by the control chip (not shown in the figure) to the touch electrode 200a, and transmit the touch sensing signal generated by the touch electrode 200a back to the control chip. In order to reduce the load on the touch electrode 200a during touch control, the auxiliary signal line 202 is not electrically connected to the touch electrode 200a, and the auxiliary signal line 202 is electrically connected to the first voltage signal terminal V1 through the switch unit 203. In the direction perpendicular to the plane where the display panel is located, each auxiliary signal line 202 overlaps with part of the touch electrode 200a in a corresponding column of touch electrodes. It is worth noting that in Figure 1 In the direction perpendicular to the plane where the display panel is located, each auxiliary signal line 103' usually overlaps only one touch electrode 101', that is, the length of each auxiliary signal line 103' along the second direction Y is usually less than the length of one touch electrode 101' along the second direction Y. Figure 1 The difference is that in Figure 2 In the illustrated embodiment, in a direction perpendicular to the plane where the display panel is located, each auxiliary signal line 202 may overlap with a plurality of touch electrodes 200a in a column of touch electrodes, that is, the length of each auxiliary signal line 202 along the second direction Y may be greater than or equal to the length of the plurality of touch electrodes 200a along the second direction Y. This has the advantage that each column of auxiliary signal lines 202 extending along the second direction Y can be electrically connected to the first voltage signal terminal V1 through only one switch unit 203, or in other words, whether a column of auxiliary signal lines 202 has a voltage signal can be controlled through only one switch unit 203.

[0034] In the touch stage t1, the touch signal line 201 sends the touch signal sent by the control chip to the touch electrode 200a, and transmits the touch sensing signal generated by the touch electrode 200a back to the control chip. The control chip determines the change in capacitance of each touch electrode 200a before and after the touch based on the touch sensing signal fed back by each touch electrode 200a in the touch electrode array 200. Then, according to the change in capacitance of each touch electrode 200a before and after the touch, the horizontal coordinate and the vertical coordinate of the touch point are determined, so as to locate the touch point. At the same time, in the touch stage t1, in order to reduce the load on the touch electrode 200a during touch, the switch unit 203 can be in the off state, so that the auxiliary signal line 202 is suspended (or floated), that is, the voltage signal transmitted by the first voltage signal terminal V1 cannot enter the auxiliary signal line 202 through the switch unit 203.

[0035] In this way, on the one hand, since the auxiliary signal line is not electrically connected to the touch electrode, the impedance on the auxiliary signal line itself can be avoided from being applied to the touch electrode, thereby reducing the load on the touch electrode; on the other hand, since the auxiliary signal line is not electrically connected to the touch electrode, and during touch, the voltage signal at the first voltage signal end cannot be transmitted to the auxiliary signal line by turning off the switch unit, so not only can the generation of coupling capacitance between the auxiliary signal line and other adjacent signal lines be avoided, but also the coupling capacitance can be avoided from affecting the touch electrode through the auxiliary signal line, thereby further reducing the load on the touch electrode, thereby improving the sensitivity of the touch display panel during touch, and enhancing the user experience.

[0036] According to some embodiments of the present application, the switch unit 203 may include, but is not limited to, a switch transistor, or may be other switch devices. For example, the switch unit 203 may be a switch transistor. Figure 3 As shown, the display panel 20 may further include a control signal line S1 and a control signal terminal V2 electrically connected to the control signal line, the switch unit 203 includes a switch transistor T1, a gate of the switch transistor T1 is electrically connected to the control signal terminal V2, a first electrode of the switch transistor T1 is electrically connected to the first voltage signal terminal V1, and a second electrode of the switch transistor T1 is electrically connected to the auxiliary signal line 202.

[0037] In the touch stage t1 , the control signal terminal V2 provides a cut-off level, and the switch transistor T1 is turned off / cut off in response to the cut-off level of the control signal terminal V2 , so that the auxiliary signal line 202 is suspended (or floated).

[0038] In this way, by controlling the switch transistor T1 to turn off during the touch stage, there can be no voltage signal on the auxiliary signal line during touch, so as to avoid the generation of coupling capacitance between the auxiliary signal line and other adjacent signal lines (such as data), thereby avoiding the coupling capacitance from affecting the touch electrode through the auxiliary signal line, reducing the load on the touch electrode, and thus improving the sensitivity of the touch display panel during touch, thereby enhancing the user experience.

[0039] Continue to see Figure 3 According to some embodiments of the present application, the display panel 20 may further include a connection line L1, which may be electrically connected to a plurality of auxiliary signal lines 202 sequentially arranged along the first direction X, and the plurality of auxiliary signal lines 202 may be electrically connected to the first voltage signal terminal V1 through the connection line L1 and the switch unit 203 in sequence. Figure 3 In the illustrated embodiment, the plurality of auxiliary signal lines 202 in the display panel 20 may be first short-circuited via the connection line L1 , and then electrically connected to the first voltage signal terminal V1 via the same switch unit 203 .

[0040] In this way, only one switch unit 203 is required in the display panel 20 to control whether the plurality of auxiliary signal lines 202 have voltage signals, thereby reducing the number of switch units used, saving wiring space, and reducing production costs.

[0041] like Figure 4 As shown, Figure 3 Different from the embodiment shown, according to other embodiments of the present application, optionally, the plurality of auxiliary signal lines 202 in the display panel 20 are divided into Q groups f, each group f may include at least one auxiliary signal line 202, and Q is a positive integer. Accordingly, the display panel 20 may include Q switch units 203, and the Q switch units 203 correspond to the Q groups f one by one. The auxiliary signal lines 202 in each group f are electrically connected to the first voltage signal terminal V1 through the same switch unit 203. Figure 4 In the illustrated embodiment, the plurality of auxiliary signal lines 202 in the display panel 20 may be divided into Q groups, and the Q groups are electrically connected to the first voltage signal terminal V1 through Q switch units 203 , respectively.

[0042] It should be noted that the number of auxiliary signal lines 202 in different groups f may be the same or different. In addition, the number of auxiliary signal lines 202 in group f may be one, that is, each auxiliary signal line 202 is electrically connected to the first voltage signal terminal V1 through a separate switch unit 203 .

[0043] In this way, since the plurality of auxiliary signal lines 202 in the display panel 20 are electrically connected to the first voltage signal terminal V1 through the plurality of switch units 203 , the power transmission burden of each switch unit 203 can be reduced, and the charging speed can be increased when charging the auxiliary signal lines 202 .

[0044] like Figure 5 As shown, in some specific embodiments, the display panel 20 may further include a plurality of columns of sub-pixels 501 and a plurality of data signal lines data arranged in sequence along the first direction X, each data signal line data being electrically connected to a plurality of sub-pixels 501 in a column of sub-pixels, and each data signal line data being used to provide a data signal to each sub-pixel 501 in a column of sub-pixels. Exemplarily, in the first direction X, the touch signal line 201 or the auxiliary signal line 202 may be located on at least one side of each column of sub-pixels.

[0045] According to some embodiments of the present application, optionally, the display panel 20 may be a liquid crystal display panel, and the touch electrode 200a may be reused as a common electrode in the liquid crystal display panel. In addition, the liquid crystal display panel may further include a pixel electrode and a liquid crystal box. An electric field may be generated between the common electrode and the pixel electrode, and under the driving action of the electric field, the liquid crystal molecules in the liquid crystal box may be deflected, thereby realizing normal display of the liquid crystal display panel. During display, the touch signal line 201 may transmit the common voltage signal Vcom to the touch electrode 200a, so that the touch electrode 200a realizes the function of the common electrode.

[0046] Specifically, if Figure 6 As shown, in the display stage t2, the touch signal line 201 inputs a constant first voltage signal, which can be understood as a common voltage signal Vcom, and the common voltage signal Vcom is transmitted to the touch electrode 200a, so that the touch electrode 200a serves as a common electrode. At the same time, in the display stage t2, the first voltage signal terminal V1 outputs a constant second voltage signal, and the second voltage signal has the same voltage value as the first voltage signal, which can also be understood as the common voltage signal Vcom. The switch unit 203 is turned on to transmit the second voltage signal to the auxiliary signal line 202, so that the voltage value of the voltage signal on the auxiliary signal line 202 is the same as or close to the voltage value of the voltage signal on the touch signal line 201.

[0047] Combination Figure 5As shown, the advantage of doing so is: assuming that the length of the first leftmost touch signal line 201 adjacent to the first leftmost data signal line data is l1, and the length of the second left touch signal line 201 adjacent to the second left data signal line data is l2. Obviously, l1>l2. Then, the coupling capacitance C1 generated between the first leftmost data signal line data and the first leftmost touch signal line 201 is greater than the coupling capacitance C2 generated between the second left data signal line data and the second left touch signal line 201, so that the loads on adjacent data signal lines data are different, affecting the display effect. Assuming that the length of the (first leftmost) auxiliary signal line 202 adjacent to the second left data signal line data is Δl, where l2+Δl≈l1, ≈ means approximately equal. It should be noted that, in a more ideal case, l2+Δl=l1. By making the auxiliary signal line 202 also have a common voltage signal Vcom, the auxiliary signal line 202 with a length of Δl will also be coupled with the second data signal line data on the left, generating a coupling capacitance ΔC, and C2+ΔC≈C1. It should be noted that, in an ideal case, C2+ΔC=C1. Therefore, the loads on adjacent data signal lines data can be made the same, thereby improving the display effect.

[0048] Combine the following Figure 7 The illustrated embodiment introduces the film layer distribution of the display panel 20 according to the embodiment of the present application.

[0049] like Figure 7 As shown, according to some embodiments of the present application, optionally, the display panel 20 may include a stacked substrate 01, a buffer layer 02, a first metal layer M1, and a second metal layer M2. An active layer b is provided between the first metal layer M1 and the buffer layer 02. An insulating layer is provided between any adjacent metal layers and between the active layer b and the first metal layer M1. Exemplarily, a gate insulating layer GI is provided between the first metal layer M1 and the active layer b, and an interlayer dielectric layer ILD is provided between the second metal layer M2 and the first metal layer M1. In addition, the display panel 20 may further include a planarization layer PLN. The display panel 20 may include a thin film transistor T. The active region of the thin film transistor T may be located in the active layer b, the gate of the thin film transistor T may be located in the first metal layer M1, and the source and / or drain of the thin film transistor T may be located in the second metal layer M2.

[0050] Exemplarily, the gate of the switch transistor T1 may be located in the first metal layer M1, and the first electrode and the second electrode of the switch transistor T1 may be located in the second metal layer M2. At least two of the touch signal line 201, the auxiliary signal line 202, and the data signal line data are located in the second metal layer M2. For example, the touch signal line 201, the auxiliary signal line 202, and the data signal line data are all located in the second metal layer M2.

[0051] In this way, since at least two of the touch signal line 201, the auxiliary signal line 202 and the data signal line data are arranged in the same layer, at least two of the touch signal line 201, the auxiliary signal line 202 and the data signal line data can be prepared together, which is beneficial to simplifying the production process.

[0052] Based on the display panel 20 provided in the above embodiment, the present application also provides a method for driving the display panel. Figure 2 As shown, the display panel 20 includes: a touch electrode array 200, a plurality of touch signal lines 201, a plurality of auxiliary signal lines 202, a switch unit 203 and a first voltage signal terminal V1; the touch electrode array 200 includes a plurality of columns of touch electrodes 200a arranged in sequence along a first direction X, and each column of touch electrodes 200a includes a plurality of touch electrodes 200a; the touch signal lines 201 and the auxiliary signal lines 202 both extend along a second direction Y, the touch signal lines 201 are electrically connected to the touch electrodes 200a, and the auxiliary signal lines 202 are not electrically connected to the touch electrodes 200a; in a direction perpendicular to the plane where the display panel is located, each auxiliary signal line 202 overlaps with a portion of the touch electrodes 200a in a corresponding column of touch electrodes, and the first direction X intersects with the second direction Y; the auxiliary signal lines 202 are electrically connected to the first voltage signal terminal V1 through the switch unit 203, and the specific structure has been described in detail above and will not be repeated here.

[0053] The driving method of the display panel provided in the embodiment of the present application comprises the following steps:

[0054] S101 . In a touch control stage, a touch control signal is provided to a touch control signal line, and a switch unit is controlled to be turned off.

[0055] Specifically, combined Figure 2 and Figure 6 As shown, in the touch stage t1, the touch signal line 201 sends the touch signal sent by the control chip to the touch electrode 200a, and transmits the touch sensing signal generated by the touch electrode 200a back to the control chip. The control chip determines the change in capacitance of each touch electrode 200a before and after the touch according to the received touch sensing signal fed back by each touch electrode 200a in the touch electrode array 200. Then, according to the change in capacitance of each touch electrode 200a before and after the touch, the horizontal coordinate and the vertical coordinate of the touch point are determined, so as to realize the positioning of the touch point. At the same time, in the touch stage t1, in order to reduce the load on the touch electrode 200a during touch, the switch unit 203 can be controlled to be in the off state, so that the auxiliary signal line 202 is suspended (or floated), that is, the voltage signal transmitted by the first voltage signal terminal V1 cannot enter the auxiliary signal line 202 through the switch unit 203.

[0056] In this way, on the one hand, since the auxiliary signal line is not electrically connected to the touch electrode, the impedance on the auxiliary signal line itself can be avoided from being applied to the touch electrode, thereby reducing the load on the touch electrode; on the other hand, since the auxiliary signal line is not electrically connected to the touch electrode, and during touch, the voltage signal at the first voltage signal end cannot be transmitted to the auxiliary signal line by turning off the switch unit, so not only can the generation of coupling capacitance between the auxiliary signal line and other adjacent signal lines be avoided, but also the coupling capacitance can be avoided from affecting the touch electrode through the auxiliary signal line, thereby further reducing the load on the touch electrode, thereby improving the sensitivity of the touch display panel during touch, and enhancing the user experience.

[0057] Combination Figure 3 and Figure 6 As shown, in some embodiments, the display panel 20 may further include a control signal line S1 and a control signal terminal V2 electrically connected to the control signal line, the switching unit 203 includes a switching transistor T1, the gate of the switching transistor T1 is electrically connected to the control signal terminal V2, the first electrode of the switching transistor T1 is electrically connected to the first voltage signal terminal V1, and the second electrode of the switching transistor T1 is electrically connected to the auxiliary signal line 202.

[0058] In the touch control stage t1 , a cutoff level is provided to the control signal terminal V2 , and the switch transistor T1 is turned off / cut off in response to the cutoff level of the control signal terminal V2 , so that the auxiliary signal line 202 is suspended (or floated).

[0059] In this way, by controlling the switch transistor T1 to turn off during the touch stage, there can be no voltage signal on the auxiliary signal line during touch, so as to avoid the generation of coupling capacitance between the auxiliary signal line and other adjacent signal lines (such as data), thereby avoiding the coupling capacitance from affecting the touch electrode through the auxiliary signal line, reducing the load on the touch electrode, and thus improving the sensitivity of the touch display panel during touch, thereby enhancing the user experience.

[0060] like Figure 8 As shown, according to some embodiments of the present application, optionally, the driving method of the display panel provided in the embodiment of the present application further includes the following steps:

[0061] S102, in the display stage, providing a constant first voltage signal to the touch signal line, providing a constant second voltage signal to the first voltage signal terminal, and controlling the switch unit to conduct to transmit the second voltage signal to the auxiliary signal line, the first voltage signal and the second voltage signal have the same voltage value.

[0062] Specifically, in the display stage t2, the touch signal line 201 inputs a constant first voltage signal, which can be understood as a common voltage signal Vcom, and the common voltage signal Vcom is transmitted to the touch electrode 200a, so that the touch electrode 200a serves as a common electrode. At the same time, in the display stage t2, the first voltage signal terminal V1 outputs a constant second voltage signal, and the voltage value of the second voltage signal is the same as that of the first voltage signal, which can also be understood as a common voltage signal Vcom. The switch unit 203 is turned on to transmit the second voltage signal to the auxiliary signal line 202, so that the voltage value of the voltage signal on the auxiliary signal line 202 is the same or similar to the voltage value of the voltage signal on the touch signal line 201. In this way, the loads on adjacent data signal lines data can be made the same, thereby improving the display effect.

[0063] In some specific examples, controlling the switch unit to be turned on may specifically include: providing a turn-on level to the control signal terminal to turn on the switch transistor. Figure 3 As shown, a conduction level is provided to the control signal terminal V2 , and the switch transistor T1 is turned on in response to the conduction level of the control signal terminal V2 , and transmits the second voltage signal output from the first voltage signal terminal V1 to the auxiliary signal line 202 .

[0064] Based on the display panel 20 provided in the above embodiment, the present application also provides a display device, including the display panel provided in the present application. Fig. 9 , Fig. 9 It is a structural schematic diagram of a display device provided in an embodiment of the present application. Fig. 9 The provided display device 1000 includes the display panel 20 provided by any of the above embodiments of the present application. Fig. 9 In the embodiment, a mobile phone is used as an example to illustrate the display device 1000. It can be understood that the display device provided in the embodiment of the present application can be a wearable product, a computer, a television, a car display device, or other display devices with display functions, and the present application does not make specific restrictions on this. The display device provided in the embodiment of the present application has the beneficial effects of the array substrate provided in the embodiment of the present application. For details, reference can be made to the specific description of the array substrate in the above embodiments, and this embodiment will not be repeated here.

[0065] It should be understood that the specific structure of the pixel circuit and the layout structure of the display panel provided in the drawings of the embodiments of the present application are only examples and are not intended to limit the present application. In addition, the above embodiments provided in the present application can be combined with each other if there is no contradiction.

[0066] According to the embodiments described above in the present application, these embodiments do not describe all the details in detail, nor do they limit the present application to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that: include: A touch electrode array, a plurality of touch signal lines, a plurality of auxiliary signal lines, a switch unit and a first voltage signal terminal; The touch electrode array comprises a plurality of columns of touch electrodes arranged in sequence along a first direction, and each column of the touch electrodes comprises a plurality of the touch electrodes; The touch signal lines and the auxiliary signal lines both extend along a second direction, the touch signal lines are electrically connected to the touch electrodes, and the auxiliary signal lines are not electrically connected to the touch electrodes; in a direction perpendicular to the plane where the display panel is located, each of the auxiliary signal lines overlaps with a portion of the touch electrodes in a corresponding column of touch electrodes, and the first direction intersects with the second direction; The auxiliary signal line is electrically connected to the first voltage signal end through the switch unit. In the touch control stage, the switch unit is in an off state.

2. The display panel according to claim 1, characterized in that: The display panel also includes a control signal line and a control signal end electrically connected to the control signal line, the switching unit includes a switching transistor, a gate of the switching transistor is electrically connected to the control signal end, a first electrode of the switching transistor is electrically connected to the first voltage signal end, and a second electrode of the switching transistor is electrically connected to the auxiliary signal line.

3. The display panel according to claim 1, characterized in that: The display panel further includes a connecting line, wherein the connecting line is electrically connected to a plurality of the auxiliary signal lines sequentially arranged along the first direction; The plurality of auxiliary signal lines are electrically connected to the first voltage signal end in sequence through the connecting line and the switch unit.

4. The display panel according to claim 1, characterized in that: The plurality of auxiliary signal lines are divided into Q groups, each of the groups includes at least one auxiliary signal line, and Q is a positive integer; The display panel comprises Q switch units, and the Q switch units correspond to the Q groups one by one; At least one of the auxiliary signal lines in each of the groups is electrically connected to the first voltage signal terminal through the same switch unit.

5. The display panel according to claim 1, characterized in that: In the display stage, the touch signal line inputs a constant first voltage signal, the first voltage signal end outputs a constant second voltage signal, the switch unit is turned on to transmit the second voltage signal to the auxiliary signal line, and the voltage values ​​of the first voltage signal and the second voltage signal are the same.

6. The display panel according to claim 1, characterized in that: The display panel further comprises a plurality of columns of sub-pixels and a plurality of data signal lines sequentially arranged along the first direction, each of the data signal lines being electrically connected to a plurality of the sub-pixels in a column of the sub-pixels; In the first direction, the touch signal line or the auxiliary signal line is located at least one side of each column of the sub-pixels.

7. The display panel according to claim 6, characterized in that: The switch unit comprises a switch transistor, the gate of the switch transistor is located at the first metal layer, and the first electrode and the second electrode of the switch transistor are located at the second metal layer; At least two of the touch signal line, the auxiliary signal line and the data signal line are located in the second metal layer.

8. A method for driving a display panel, characterized in that: The display panel comprises: a touch electrode array, a plurality of touch signal lines, a plurality of auxiliary signal lines, a switch unit and a first voltage signal terminal; the touch electrode array comprises a plurality of columns of touch electrodes arranged in sequence along a first direction, and each column of the touch electrodes comprises a plurality of the touch electrodes; the touch signal lines and the auxiliary signal lines both extend along a second direction, the touch signal lines are electrically connected to the touch electrodes, and the auxiliary signal lines are not electrically connected to the touch electrodes; in a direction perpendicular to a plane where the display panel is located, each of the auxiliary signal lines overlaps with a portion of the touch electrodes in a corresponding column of touch electrodes, and the first direction intersects with the second direction; the auxiliary signal lines are electrically connected to the first voltage signal terminal through the switch unit, and the method comprises: In the touch control stage, a touch control signal is provided to the touch control signal line, and the switch unit is controlled to be turned off.

9. The method according to claim 8, characterized in that The method further comprises: In the display stage, a constant first voltage signal is provided to the touch signal line, a constant second voltage signal is provided to the first voltage signal end, and the switch unit is controlled to be turned on to transmit the second voltage signal to the auxiliary signal line, and the voltage values ​​of the first voltage signal and the second voltage signal are the same.

10. The method according to claim 9, characterized in that The display panel further includes a control signal line and a control signal terminal electrically connected to the control signal line, the switch unit includes a switch transistor, a gate of the switch transistor is electrically connected to the control signal terminal, a first electrode of the switch transistor is electrically connected to the first voltage signal terminal, and a second electrode of the switch transistor is electrically connected to the auxiliary signal line; The controlling the switch unit to turn off specifically includes: Providing a cut-off level to the control signal terminal to turn off the switch transistor; The controlling the switch unit to be turned on specifically includes: A conduction level is provided to the control signal terminal to turn on the switch transistor.

11. A display device, characterized in that: The invention comprises a display panel as claimed in any one of claims 1 to 7.

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