Touch display panel and display device

Abstract

The invention discloses a touch display panel and a display device, and relates to the technical field of display. The touch display panel comprises a touch display panel, and the touch display panel comprises a substrate as well as a plurality of data signal lines, a plurality of touch electrodes, a plurality of pixel electrodes, a plurality of first switch units and a plurality of second switch units which are located on the substrate; the data signal lines are multiplexed as touch signal lines, and the data signal lines are connected with the touch electrodes through the first switch units and are connected with the pixel electrodes through the second switch units; in a touch control stage, each first switch unit is switched on, each second switch unit is switched off, and each data signal line transmits a touch control signal to each touch control electrode; in the display stage, the first switch units are disconnected, the second switch units are connected, and the data signal lines transmit data signals to the corresponding pixel electrodes in a time-sharing mode. According to the touch display panel, the pixel aperture ratio of the corresponding touch display panel can be effectively improved.

Description

Technical Field

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

[0002] With the rapid development of liquid crystal display technology, the application of liquid crystal display panels is becoming more and more extensive. For example, the In-Cell (embedded) touch display panel embeds the touch panel function into the liquid crystal display panel, so that the liquid crystal display panel has both display and touch detection functions. In-Cell refers to the method of embedding the touch panel function into the liquid crystal pixel, that is, embedding the touch sensor function inside the liquid crystal display panel. Compared with the touch display panel formed by bonding the touch panel and the liquid crystal display panel, the In-Cell touch display panel can make the liquid crystal display panel thinner and lighter, becoming the main development direction of touch display technology.

[0003] However, in order to realize the touch function, it is necessary to add touch signal transmission lines in the display area of ​​the touch display panel. The added touch signal lines will occupy the pixel opening, resulting in a lower pixel opening ratio. Summary of the invention

[0004] The main purpose of the present application is to provide a touch display panel and a display device, aiming to solve the problem that the touch signal line occupies the pixel opening, resulting in a low pixel opening ratio.

[0005] To achieve the above-mentioned object, the present application proposes a touch display panel, the touch display panel comprising: a base substrate and a plurality of data signal lines, a plurality of touch electrodes, a plurality of pixel electrodes, a plurality of first switch units and a plurality of second switch units located on the base substrate;

[0006] The data signal line is multiplexed into a touch signal line, the data signal line is connected to the touch electrode via the first switch unit, and is connected to the pixel electrode via the second switch unit;

[0007] In the touch control stage, each of the first switch units is turned on, each of the second switch units is turned off, and each of the data signal lines transmits a touch control signal to each of the touch control electrodes;

[0008] In the display stage, each of the first switch units is turned off, each of the second switch units is turned on, and each of the data signal lines transmits a data signal to the corresponding pixel electrode in a time-sharing manner.

[0009] In one embodiment, the touch electrodes are multiplexed as common electrodes, and the data signal lines are multiplexed as common electrode lines;

[0010] In the display stage, the target data signal line is used to transmit a common electrode signal, wherein the target data signal line and the data signal line currently transmitting the data signal are connected to the same touch electrode.

[0011] In one embodiment, the touch display panel further includes a black matrix layer located on the base substrate, and the first switch unit and the second switch unit are respectively located between the black matrix layer and the base substrate;

[0012] The first switch unit and the second switch unit are thin film transistors respectively, and the channel of the target switch unit coincides with the orthographic projection of the black matrix layer on the base substrate, wherein the target switch unit includes at least one of the first switch unit and the second switch unit.

[0013] In one embodiment, each of the data signal lines is located between the black matrix layer and the base substrate, and an orthographic projection of each of the data signal lines on the base substrate coincides with an orthographic projection of the black matrix layer on the base substrate.

[0014] In one embodiment, the touch display panel further includes a plurality of first control signal lines, and the first control signal lines are connected to control ends of the plurality of first switch units;

[0015] Wherein, an extending direction of the first control signal line intersects with an extending direction of the data signal line.

[0016] In one embodiment, the touch display panel further includes a plurality of second control signal lines, and the second control signal lines are connected to control ends of a plurality of the second switch units;

[0017] Wherein, an extending direction of the second control signal line intersects with an extending direction of the data signal line.

[0018] In one embodiment, each of the first control signal lines is located between the black matrix layer and the base substrate, and an orthographic projection of each of the first control signal lines on the base substrate coincides with an orthographic projection of the black matrix layer on the base substrate.

[0019] In one embodiment, each of the second control signal lines is located between the black matrix layer and the base substrate, and an orthographic projection of each of the second control signal lines on the base substrate coincides with an orthographic projection of the black matrix layer on the base substrate.

[0020] In one embodiment, the first control signal line and the second control signal line are disposed adjacent to each other, and the first control signal line and the second control signal line are respectively located between the adjacent first switch unit and the second switch unit.

[0021] In a second aspect, the present application further provides a display device, comprising the touch display panel as described in the first aspect.

[0022] The above-mentioned touch display panel and display device include a base substrate and a plurality of data signal lines, a plurality of touch electrodes, a plurality of pixel electrodes, a plurality of first switch units and a plurality of second switch units located on the base substrate. By connecting the data signal line to the touch electrode via the first switch unit, and connecting the data signal line to the pixel electrode via the second switch unit, in the touch stage, each first switch unit can be controlled to be turned on and each second switch unit can be turned off, so that each data signal line can transmit a touch signal to each touch electrode respectively, so that the data signal line can be used as a touch signal line to transmit a touch signal; and in the display stage, by controlling each first switch unit to be turned off and each second switch unit to be turned on, each data signal line transmits a data signal to the corresponding pixel electrode in a time-sharing manner, so that the function of the data signal line transmitting a data signal can be realized. Therefore, through the above-mentioned design, it is possible to realize the multiplexing of the data signal line as the touch signal line, thereby avoiding the need to set up an additional touch signal line in the touch display panel, and improving the pixel opening utilization rate of the touch display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 It is one of the planar structural schematic diagrams of a touch display panel in the related art;

[0025] Figure 2 The second schematic diagram of the planar structure of a touch display panel in the related art;

[0026] Figure 3 The third schematic diagram of the planar structure of a touch display panel in the related art;

[0027] Figure 4 This is one of the schematic diagrams of the planar structure of a touch display panel in one embodiment of the present application;

[0028] Figure 5 This is the second schematic diagram of the planar structure of the touch display panel in one embodiment of the present application;

[0029] Figure 6 This is a schematic diagram of the planar layout of a touch display panel in an embodiment of the present application;

[0030] Figure 7 for Figure 5 A schematic diagram of a partial planar structure of a touch display panel;

[0031] Figure 8 Schematic diagram of the structure of a display device in one embodiment of the present application.

[0032] Description of Figure Numbers:

[0033] 11-data signal line, 12-touch signal line, 13-pixel electrode, 14-touch electrode, 21-data signal line, 22-pixel electrode, 23-touch electrode, 231-pixel opening, 24-first switch unit, 25-second switch unit, 26-first control signal line, 27-second control signal line, 28-driving chip, 100-touch display panel, 1000-display device.

[0034] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0038] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0039] As described in the background technology, with the rapid development of liquid crystal display technology, the application of liquid crystal display panels is becoming more and more extensive. For example, the In-Cell touch display panel embeds the touch panel function into the liquid crystal display panel, so that the liquid crystal display panel has both display and touch detection functions. In-Cell refers to a method of embedding the touch panel function into liquid crystal pixels, that is, embedding the touch sensor function inside the liquid crystal display panel. Compared with the touch display panel formed by bonding the touch panel and the liquid crystal display panel, the In-Cell touch display panel can make the liquid crystal display panel thinner and lighter, and has become the main development direction of touch display technology.

[0040] However, in order to realize the touch function, it is necessary to add touch signal transmission lines in the display area of ​​the touch display panel, such as Figure 1 As shown, in the related art, the touch display panel includes a data signal line 11, a touch signal line 12, a pixel electrode 13 and a touch electrode 14, the touch electrode 14 is connected to the touch signal line 12, and the pixel electrode 13 is connected to the data signal line 11. Figure 2 and Figure 3 As shown, the data signal line 11 and the touch signal line 12 are arranged in the same layer, and the data signal line 11 and the touch signal line 12 are two independent types of metal lines. A touch signal line 12 is arranged in each pixel of the display area, and the touch signal line 12 is usually designed to pass through the pixel opening area. Therefore, the touch signal line 12 will occupy the pixel opening, resulting in a low pixel opening ratio.

[0041] Based on the above technical problems, the inventors have found that by time-division multiplexing the data signal lines into touch signal lines, it is possible to avoid setting the touch signal lines in the touch display panel, thereby avoiding the touch signal lines from occupying the pixel openings, and improving the pixel opening rate of the touch display panel. Based on this, the inventors have further studied the technical solutions of the embodiments of the present application. Specifically, the touch display panel provided by the embodiments of the present application includes: a substrate and a plurality of data signal lines, a plurality of touch electrodes, a plurality of pixel electrodes, a plurality of first switch units and a plurality of second switch units located on the substrate. The data signal lines are multiplexed into touch signal lines, and the data signal lines are connected to the touch electrodes via the first switch units, and are connected to the pixel electrodes via the second switch units. In the touch stage, each first switch unit is turned on, each second switch unit is turned off, and each data signal line transmits a touch signal to each touch electrode respectively. In the display stage, each first switch unit is turned off, each second switch unit is turned on, and each data signal line transmits a data signal to the corresponding pixel electrode in time.

[0042] By connecting the data signal line to the touch electrode via the first switch unit, and connecting the data signal line to the pixel electrode via the second switch unit, in the touch stage, each first switch unit can be controlled to be turned on, and each second switch unit can be turned off, so that each data signal line can transmit a touch signal to each touch electrode respectively, so that the data signal line can be used as a touch signal line to transmit a touch signal; and in the display stage, by controlling each first switch unit to be turned off, and each second switch unit to be turned on, each data signal line transmits a data signal to the corresponding pixel electrode in a time-sharing manner, so that the function of the data signal line transmitting a data signal can be realized. Therefore, through the above design, the data signal line can be multiplexed as a touch signal line, thereby avoiding the need to set up an additional touch signal line in the touch display panel, avoiding the touch signal line from occupying the pixel opening, and thus improving the pixel opening utilization rate of the touch display panel.

[0043] The above is the core idea of ​​this application. The technical solutions in the embodiments of this application will be described clearly and completely below in conjunction with the drawings in the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] This application proposes a touch display panel, such as Figure 4 As shown, the touch display panel includes: a base substrate (not shown) and a plurality of data signal lines 21, a plurality of touch electrodes 23, a plurality of pixel electrodes 22, a plurality of first switch units 24 and a plurality of second switch units 25 located on the base substrate. In the liquid crystal touch screen, the data signal line 21 can be used to provide a data signal to the pixel electrode 13 of the pixel electrode 22, and grayscale display can be achieved by controlling the deflection degree of the liquid crystal. The pixel electrode 22 is the smallest unit used for display in the touch display panel. The touch electrode 23 can receive a touch signal to achieve touch sensing.

[0045] The data signal line 21 is multiplexed as a touch signal line. The data signal line 21 is connected to the touch electrode 23 via the first switch unit 24 , and is connected to the pixel electrode 22 via the second switch unit 25 .

[0046] It can be understood that the touch signal line needs to transmit the touch signal in the touch stage, and the data signal line 21 needs to transmit the data signal in the display stage. After the data signal line 21 is multiplexed as the touch signal line, the data signal line 21 needs to transmit the touch signal in the touch stage and transmit the data signal in the display stage. By connecting the data signal line 21 to the touch electrode 23 via the first switch unit 24, and connecting the data signal line 21 to the pixel electrode 22 via the second switch unit 25, when the first switch unit 24 is turned on, the data signal line 21 is connected to the touch electrode 23, and a signal can be output to the touch electrode 23; when the second switch unit 25 is turned on, the data signal line 21 is connected to the pixel electrode 22, and the data signal line 21 can output a signal to the pixel electrode 22. By multiplexing the data signal line 21 as the touch signal line, the touch signal line can be prevented from occupying the pixel opening 231, thereby improving the pixel opening utilization rate of the touch display panel. For example, in the related art, based on a 12.1-inch 2.5K resolution touch display panel, when the touch signal line passes through the pixel opening area, the pixel opening ratio will drop from 52.06% (without touch design) to 41.6% (with touch design), and the pixel opening ratio will be reduced by about 10%. Therefore, multiplexing the data signal line 21 as a touch signal line can significantly improve the pixel opening ratio of the touch display panel.

[0047] In the touch control stage, each first switch unit 24 is turned on, and each second switch unit 25 is turned off, so that the data signal line 21 is connected to the touch electrode 23, and the data signal line 21 is disconnected from the pixel electrode 22. Then, each data signal line 21 can transmit a touch signal to each touch electrode 23 respectively, and will not transmit the touch signal to the pixel electrode 22, so as to achieve the touch control function while avoiding negative impact on the display function.

[0048] In the display stage, each first switch unit 24 is turned off, and each second switch unit 25 is turned on, so that the data signal line 21 is disconnected from the touch electrode 23, and the data signal line 21 is connected to the pixel electrode 22. Then, each data signal line 21 can transmit the data signal to the pixel electrode 13 of the corresponding pixel electrode 22 in a time-sharing manner, and the data signal will not be transmitted to the touch electrode 23, so as to realize the display function while avoiding negative impact on the touch function.

[0049] The above-mentioned touch display panel includes a base substrate and a plurality of data signal lines 21, a plurality of touch electrodes 23, a plurality of pixel electrodes 22, a plurality of first switch units 24 and a plurality of second switch units 25 located on the base substrate. By connecting the data signal line 21 to the touch electrode 23 via the first switch unit 24 and connecting the data signal line 21 to the pixel electrode 22 via the second switch unit 25, in the touch stage, each first switch unit 24 can be controlled to be turned on and each second switch unit 25 can be turned off, so that each data signal line 21 can transmit a touch signal to each touch electrode 23 respectively, so that the data signal line 21 can be used as a touch signal line to transmit a touch signal; and in the display stage, by controlling each first switch unit 24 to be turned off and each second switch unit 25 to be turned on, each data signal line 21 transmits a data signal to the pixel electrode 13 of the corresponding pixel electrode 22 in a time-sharing manner, so that the function of the data signal line 21 transmitting a data signal can be realized. Therefore, through the above design, the data signal line 21 can be multiplexed as a touch signal line, thereby avoiding the need to set up additional touch signal lines in the touch display panel, and avoiding the touch signal lines from occupying the pixel openings 231, thereby improving the pixel opening utilization rate of the touch display panel, and further improving the light transmittance of the touch display panel and the display effect of the touch display panel.

[0050] In one embodiment, Figure 5 As shown, the touch electrodes 23 are multiplexed as common electrodes, and the data signal lines 21 are multiplexed as common electrode lines. It should be noted that: Figure 5 The structure shown is a schematic diagram of a planar structure of a touch display panel, in which the touch electrode 23 and the pixel electrode 13 are located in different layers.

[0051] In the display stage, the target data signal line 21 is used to transmit a common electrode signal, wherein the target data line and the data signal line 21 currently transmitting the data signal are connected to the same touch electrode 23 .

[0052] In applications, the touch display panel may include a display area and a non-display area, and the common electrode (COM) in the display area may be divided into a plurality of common electrode units, which are multiplexed as touch electrodes 23, and each touch electrode 23 may be arranged in an array in the display area. In related technologies, when the touch electrodes 23 are multiplexed as common electrodes, the touch signal lines are often also multiplexed as common electrode signal lines, and the touch signal lines transmit touch signals in the touch stage and transmit common electrode signals in the display stage.

[0053] In the present application, since the data signal line 21 is multiplexed as a touch signal line, when the touch electrode 23 is multiplexed as a common electrode, the data signal line 21 is also multiplexed as a common electrode line. However, both the data signal and the common electrode signal need to be transmitted in the display stage, and one data signal line 21 can only transmit one type of signal. To solve this problem, the data signal and the common electrode signal need to be transmitted using different data signal lines 21. Since each data signal line 21 transmits the data signal to the pixel electrode 13 of the corresponding pixel electrode 22 in a time-sharing manner during the display stage, and the transmission order of each data signal line 21 is fixed, the corresponding avoidance rules can be set so that different data signal lines 21 are used to transmit the data signal and the common electrode signal at the same time, that is, the target data signal line 21 is used to transmit the common electrode signal. It should be noted that the target data signal line 21 corresponding to a data signal line 21 that transmits the data signal can be one or more, which can be determined according to actual needs.

[0054] Exemplarily, in the display stage, the first switch unit 24 is disconnected and the second switch unit 25 is turned on. At this time, the data signal line 21 provides the data signal to the pixel electrode 13 in a time-sharing manner, and the common electrode signal is provided by the target data signal line 21 adjacent to the data signal line 21 currently transmitting the data signal, thereby ensuring that the pixel electrode 22 is normally lit.

[0055] In one embodiment, the touch display panel further includes a black matrix (BM) layer (not shown) located on the base substrate, and the first switch unit 24 and the second switch unit 25 are respectively located between the black matrix layer and the base substrate. The black matrix layer can block light and separate the sub-pixels to prevent the sub-pixels from cross-affecting each other during display, thereby improving the color contrast.

[0056] The first switch unit 24 and the second switch unit 25 are thin film transistors respectively, and the orthographic projection of the channel of the target switch unit on the base substrate coincides with the orthographic projection of the black matrix layer on the base substrate, wherein the target switch unit includes at least one of the first switch unit 24 and the second switch unit 25. The target switch unit may be the first switch unit 24, may be the second switch unit 25, and may also include the first switch unit 24 and the second switch unit 25.

[0057] It should be noted that the first switch unit 24 and the second switch unit 25 can be MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) transistors, respectively. The MOS transistor includes a source, a drain, and a gate. Generally, the source and drain of a MOS transistor are not distinguished. Therefore, the present application uses the first pole and the second pole to represent the two poles of the MOS transistor. The gate of the MOS transistor is used to receive a gate drive signal, and the MOS transistor is turned on or off in response to the gate drive signal. MOS transistors are divided into two types: N-channel MOS (NMOS) and P-channel MOS (PMOS). NMOS transistors are turned on in response to low-level signals, and PMOS transistors are turned on in response to high-level signals. The first switch unit 24 and the second switch unit 25 of the present embodiment can be NMOS transistors or PMOS transistors.

[0058] Exemplarily, the first switch unit 24 and the second switch unit 25 are PMOS tubes, and the first switch unit 24 and the second switch unit 25 are turned on in response to a high level signal and turned off in response to a low voltage signal, respectively. The first electrode of the first switch unit 24 is connected to the data signal line 21, and the second electrode of the first switch unit 24 is connected to the touch electrode 23, so that when the first switch unit 24 is turned on, the data signal line 21 is connected to the touch electrode 23. The first electrode of the second switch unit 25 is connected to the data signal line 21, and the second electrode of the second switch unit 25 is connected to the pixel electrode 22, so that when the second switch unit 25 is turned on, the data signal line 21 is connected to the pixel electrode 22.

[0059] It can be understood that since the first switch unit 24 and the second switch unit 25 are respectively located between the black matrix layer and the base substrate, the orthographic projection of the channel of the target switch unit on the base substrate coincides with the orthographic projection of the black matrix layer on the base substrate, and the black matrix layer is located above the channel of the target switch unit, and the black matrix layer can block light. Therefore, the black matrix layer can block external light directed to the channel of the target switch unit, thereby preventing photogenerated carriers from causing abnormal conduction of the target switch unit, causing misconduction of the TFT and resulting in abnormal display and touch functions of the touch display panel.

[0060] In one embodiment, each data signal line 21 is located between the black matrix layer and the base substrate, and the orthographic projection of each data signal line 21 on the base substrate coincides with the orthographic projection of the black matrix layer on the base substrate.

[0061] In applications, the touch signal line of the related technology passes through the pixel opening area, and its orthographic projection on the base substrate does not coincide with the orthographic projection of the black matrix layer on the base substrate, that is, the touch signal line is not located below the bm, resulting in a low pixel opening rate of the touch display panel of the related technology.

[0062] In this embodiment, the orthographic projection of each data signal line 21 on the substrate coincides with the orthographic projection of the black matrix layer on the substrate, and the orthographic projection of each data signal line 21 on the substrate does not overlap with the orthographic projection of the pixel opening area on the substrate. Therefore, when the data signal line 21 is reused as a touch signal line, the touch signal line can be prevented from occupying the pixel opening 231, thereby improving the pixel opening utilization rate of the touch display panel. In addition, since the data signal line 21 is located between the black matrix layer and the substrate, and the black matrix layer is a light shielding layer, the width of the black matrix layer is often greater than the width of the data signal line 21. Therefore, the black matrix layer can block the light from the outside to the data signal line 21, thereby preventing the data signal line 21 from reflecting light and ensuring the display effect of the touch display panel.

[0063] In one embodiment, Figure 5 As shown, the touch display panel further includes a plurality of first control signal lines 26, and the first control signal lines 26 are connected to the control ends of the plurality of first switch units 24. In application, one data signal line 21 can be connected to one touch electrode 23 via 5 to 10 first switch units 24, that is, each touch electrode 23 can correspond to 5 to 10 first control signal lines 26. For example, Figure 6 As shown, there are five touch connection holes between a data signal line 21 and a touch electrode 23, and a corresponding data signal line 21 can be connected to a touch electrode 23 via five first switch units 24, that is, each touch electrode 23 can correspond to five first control signal lines 26. The touch display panel may include one or more driving chips 28, for example Figure 6 There are two driving chips 28 in the middle, and the driving chips 28 are connected to the data signal lines 21 to output corresponding signals to the data signal lines 21.

[0064] It should be noted that, when the first switch unit 24 is a thin film transistor, the control terminal of the first switch unit 24 is the gate of the thin film transistor.

[0065] The extending direction of the first control signal line 26 intersects with the extending direction of the data signal line 21 .

[0066] It can be understood that by connecting the first control signal line 26 to the control ends of multiple first switch units 24, the first control signal line 26 can transmit the first control signal to the control ends of multiple first switch units 24, so that the first switch units 24 are turned on or off in response to the first control signal.

[0067] It should be noted that, in applications, the data signal line 21 often extends in the column direction, and the extension direction of the first control signal line 26 can be the row direction. The first control signal line 26 can be connected to a row of first switch units 24, thereby controlling the on and off of a row of first switch units 24 through a first control signal line 26.

[0068] Exemplarily, the first switch unit 24 is a PMOS transistor. In the display stage, each first control signal line 26 transmits a low-level signal to the first switch unit 24 of each row, and each first switch unit 24 is disconnected in response to the low-level signal. In the touch stage, each first control signal line 26 transmits a high-level signal to the first switch unit 24 of each row, and each first switch unit 24 is turned on, so that the data signal line 21 is conductively connected to the touch electrode 23.

[0069] In one embodiment, each first control signal line 26 is located between the black matrix layer and the base substrate, and the orthographic projection of each first control signal line 26 on the base substrate coincides with the orthographic projection of the black matrix layer on the base substrate.

[0070] In applications, the width of the black matrix layer is often much larger than the width of the first control signal line 26. For example, the line width of the first control signal line 26 is about 3um, while the width of the black matrix layer is often 16-20um. Therefore, the black matrix layer can better block the light from the outside to the first control signal line 26, prevent the first control signal line 26 from reflecting the light, and ensure the display effect of the touch display panel.

[0071] In one embodiment, Figure 5 and Figure 7 As shown, the touch display panel further includes a plurality of second control signal lines 27 , and the second control signal lines 27 are connected to the control ends of the plurality of second switch units 25 .

[0072] Similarly, when the second switch unit 25 is a thin film transistor, the control terminal of the second switch unit 25 is the gate of the thin film transistor.

[0073] The extension direction of the second control signal line 27 intersects with the extension direction of the data signal line 21. The second control signal line 27 and the first control signal line 26 may be located in the same conductive layer.

[0074] It can be understood that by connecting the second control signal line 27 to the control ends of multiple second switch units 25, the second control signal line 27 can transmit the second control signal to the control ends of multiple second switch units 25, so that the second switch units 25 are turned on or off in response to the second control signal.

[0075] It should be noted that, in applications, the data signal line 21 often extends in the column direction, and the extension direction of the second control signal line 27 can also be the row direction. The second control signal line 27 can be connected to a row of second switch units 25, thereby controlling the on and off of a row of second switch units 25 through a second control signal line 27.

[0076] Exemplarily, the first switch unit 24 and the second switch unit 25 are PMOS transistors, respectively. In the display stage, each first control signal line 26 transmits a low-level signal to the first switch unit 24 of each row, and each second control signal line 27 transmits a high-level signal to the second switch unit 25 of each row. Each first switch unit 24 is disconnected in response to the low-level signal, and each second switch unit 25 is turned on in response to the high-level signal. Then, the data signal line 21 is connected to the pixel electrode 13 and disconnected from the touch electrode 23. The data signal line 21 can transmit the data signal to the pixel electrode 22 of each column in a time-sharing manner to realize the array. In the touch stage, each second control signal line 27 transmits a high-level signal to the second switch unit 25 of each row, and each second switch unit 25 is turned on, so that the data signal line 21 is connected to the touch electrode 23.

[0077] In one embodiment, each second control signal line 27 is located between the black matrix layer and the base substrate, and the orthographic projection of each second control signal line 27 on the base substrate coincides with the orthographic projection of the black matrix layer on the base substrate.

[0078] In applications, the width of the black matrix layer is often much larger than the width of the second control signal line 27. For example, the line width of the second control signal line 27 is also about 3um, while the width of the black matrix layer is often 16-20um. Therefore, the black matrix layer can also better block the light from the outside to the second control signal line 27, prevent the second control signal line 27 from reflecting the light, and ensure the display effect of the touch display panel.

[0079] In one embodiment, Figure 4 and Figure 5 As shown, the first control signal line 26 and the second control signal line 27 are disposed adjacent to each other, and the first control signal line 26 and the second control signal line 27 are respectively located between the adjacent first switch unit 24 and the second switch unit 25 .

[0080] See also Figure 1As shown, since the first switch unit 24 and the second switch unit 25 are both connected to the data signal line 21, the first switch unit 24 and the second switch unit 25 connected to the same data signal line 21 are relatively close, that is, the first switch unit 24 and the second switch unit 25 connected to the same data signal line 21 are the adjacent first switch unit 24 and the second switch unit 25. The first control signal line 26 and the second control signal line 27 are arranged between the adjacent first switch unit 24 and the second switch unit 25, so that the distance between the first control signal line 26 and the first switch unit 24 is relatively close, and the distance between the second control signal line 27 and the second switch unit 25 is relatively close, so that the first control signal line 26 is conveniently connected to the first switch unit 24, and the second control signal line 27 is conveniently connected to the second switch unit 25. In addition, by locating the first control signal line 26 and the second control signal line 27 respectively between the adjacent first switch unit 24 and the second switch unit 25, it is possible to avoid the overlap of the orthographic projection of the first control signal line 26 on the substrate and the orthographic projection of the pixel opening area on the substrate, and to avoid the overlap of the orthographic projection of the second control signal line 27 on the substrate and the orthographic projection of the pixel opening area on the substrate, thereby avoiding the first control signal line 26 and the second control signal line 27 from affecting the pixel aperture ratio.

[0081] In one example, the first control signal line 26 can be set on a side close to the first switch unit 24, and the second control signal line 27 can be set on a side close to the second switch unit 25, thereby further shortening the distance between the first control signal line 26 and the first switch unit 24, and shortening the distance between the second control signal line 27 and the second switch unit 25, thereby reducing the length of the connecting line between the control signal line and the switch unit and avoiding winding.

[0082] In one embodiment, Figure 8 As shown, the present application also provides a display device 1000, including the touch display panel 100 as described above. The display device 1000 includes the touch display panel 100 as described in any of the above schemes, so the display device 1000 also has the beneficial effects of the touch display panel 100 in the above embodiments, and the similarities can be understood by referring to the above explanation of the touch display panel 100, which will not be repeated below.

[0083] The display device provided in the embodiment of the present application can be Figure 8 The mobile phone shown can also be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, industrial control equipment, medical display screens, touch interactive terminals, etc. The embodiments of the present application do not specifically limit this.

[0084] The above description is only an exemplary embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A touch display panel, characterized in that: The touch display panel comprises: a base substrate and a plurality of data signal lines, a plurality of touch electrodes, a plurality of pixel electrodes, a plurality of first switch units and a plurality of second switch units located on the base substrate; The data signal line is multiplexed into a touch signal line, the data signal line is connected to the touch electrode via the first switch unit, and is connected to the pixel electrode via the second switch unit; In the touch control stage, each of the first switch units is turned on, each of the second switch units is turned off, and each of the data signal lines transmits a touch control signal to each of the touch control electrodes; In the display stage, each of the first switch units is turned off, each of the second switch units is turned on, and each of the data signal lines transmits a data signal to the corresponding pixel electrode in a time-sharing manner.

2. The touch display panel according to claim 1, characterized in that: The touch electrodes are multiplexed into common electrodes, and the data signal lines are multiplexed into common electrode lines; In the display stage, the target data signal line is used to transmit a common electrode signal, wherein the target data signal line and the data signal line currently transmitting the data signal are connected to the same touch electrode.

3. The touch display panel according to claim 1, characterized in that: The touch display panel further comprises a black matrix layer located on the base substrate, and the first switch unit and the second switch unit are respectively located between the black matrix layer and the base substrate; The first switch unit and the second switch unit are thin film transistors respectively, and the channel of the target switch unit coincides with the orthographic projection of the black matrix layer on the base substrate, wherein the target switch unit includes at least one of the first switch unit and the second switch unit.

4. The touch display panel according to claim 3, characterized in that: Each of the data signal lines is located between the black matrix layer and the base substrate, and an orthographic projection of each of the data signal lines on the base substrate coincides with an orthographic projection of the black matrix layer on the base substrate.

5. The touch display panel according to claim 3, characterized in that: The touch display panel further comprises a plurality of first control signal lines, wherein the first control signal lines are connected to control ends of the plurality of first switch units; Wherein, an extending direction of the first control signal line intersects with an extending direction of the data signal line.

6. The touch display panel according to claim 5, characterized in that: The touch display panel further comprises a plurality of second control signal lines, wherein the second control signal lines are connected to control ends of the plurality of second switch units; Wherein, an extending direction of the second control signal line intersects with an extending direction of the data signal line.

7. The touch display panel according to claim 5, characterized in that: Each of the first control signal lines is located between the black matrix layer and the base substrate, and an orthographic projection of each of the first control signal lines on the base substrate coincides with an orthographic projection of the black matrix layer on the base substrate.

8. The touch display panel according to claim 6, characterized in that: Each of the second control signal lines is located between the black matrix layer and the base substrate, and an orthographic projection of each of the second control signal lines on the base substrate coincides with an orthographic projection of the black matrix layer on the base substrate.

9. The touch display panel according to claim 6, characterized in that: The first control signal line and the second control signal line are disposed adjacent to each other, and the first control signal line and the second control signal line are respectively located between the adjacent first switch unit and the second switch unit.

10. A display device, characterized in that: It comprises the touch display panel as claimed in any one of claims 1 to 9.

Images