Touch display panel and touch display device

Abstract

Embodiments of the present application provide a touch display panel and a touch display device. The touch display panel comprises a first display area, a second display area and a binding area arranged along a first direction. The binding area is provided with a touch pad for inputting a touch driving signal. The first display area and the second display area are both provided with a plurality of touch electrodes. The touch display panel further comprises a plurality of touch signal lines extending along the first direction and arranged along a second direction. The touch pad is electrically connected to the touch electrodes through the touch signal lines. The first direction intersects the second direction. The touch signal lines electrically connected to the touch electrodes in the first display area are first touch signal lines. The touch signal lines electrically connected to the touch electrodes in the second display area are second touch signal lines. The width of the second touch signal lines is smaller than the width of the first touch signal lines. The width is the minimum distance along the second direction. The embodiments of the present application can improve the aperture ratio of the touch display panel and the touch display device.

Description

Technical Field

[0001] This application belongs to the field of display technology, and in particular relates to a touch display panel and a touch display device. Background Technology

[0002] With the development of touch technology, touch display devices are becoming increasingly popular. Users can operate them directly with their fingers or styluses, making them convenient and comfortable to use. Existing touch display devices include multiple touch electrodes, touch traces electrically connected to each touch electrode, and touch chips electrically connected to the touch traces. The touch traces are used to transmit touch scanning signals sent by the touch chip.

[0003] However, as the size of touch display devices increases, the number of touch traces increases, and the aperture ratio of touch display devices decreases. Summary of the Invention

[0004] This application provides a touch display panel and a touch display device that can improve the aperture ratio of the touch display panel and the touch display device.

[0005] In a first aspect, embodiments of this application provide a touch display panel, which includes a first display area, a second display area, and a bonding area arranged along a first direction. The bonding area is provided with touch pads for inputting touch driving signals. Both the first and second display areas are provided with multiple touch electrodes. The touch display panel also includes multiple touch signal lines extending along the first direction and spaced apart along the second direction. The touch pads are electrically connected to the touch electrodes through the touch signal lines, and the first and second directions intersect. The touch signal line electrically connected to the touch electrodes in the first display area is the first touch signal line, and the touch signal line electrically connected to the touch electrodes in the second display area is the second touch signal line. The width of the second touch signal line is smaller than the width of the first touch signal line, and the width is the minimum distance along the second direction.

[0006] Secondly, embodiments of this application provide a touch display device, which includes a touch display panel as provided in the first aspect.

[0007] The touch display panel and touch display device of this application embodiment are divided into a first display area and a second display area according to their distance from the bonding area. The first display area is far from the bonding area, and the second display area is close to the bonding area. The touch signal line electrically connected to the touch electrode in the first display area is the first touch signal line, and the touch signal line electrically connected to the touch electrode in the second display area is the second touch signal line. The width of the second touch signal line is smaller than the width of the first touch signal line. That is, the touch electrode in the second display area uses a thinner second touch signal line, or in other words, the width of the second touch signal line is reduced, thereby reducing the light obstruction by the second touch signal line and increasing the aperture ratio of the touch display panel and the touch display device. On the other hand, the touch electrode in the first display area still uses a thicker first touch signal line, which can ensure that the impedance of the longer first touch signal line is low, and ensure that the touch electrode in the first display area has good touch sensitivity. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of a touch display panel provided in an embodiment of this application;

[0010] Figure 2 Another structural schematic diagram of the touch display panel provided in the embodiments of this application;

[0011] Figure 3 This is another schematic diagram of the structure of the touch display panel provided in the embodiments of this application;

[0012] Figure 4 This is another schematic diagram of the structure of the touch display panel provided in the embodiments of this application;

[0013] Figure 5 This is another schematic diagram of the structure of the touch display panel provided in the embodiments of this application;

[0014] Figure 6 This is another schematic diagram of the structure of the touch display panel provided in the embodiments of this application;

[0015] Figure 7 A top view schematic diagram of a touch display panel provided in an embodiment of this application;

[0016] Figure 8 This is a partial cross-sectional schematic diagram of a touch display panel provided in an embodiment of this application;

[0017] Figure 9Another top view schematic diagram of the touch display panel provided in the embodiments of this application;

[0018] Figure 10 Another partial cross-sectional schematic diagram of the touch display panel provided in the embodiments of this application;

[0019] Figure 11 Another top view schematic diagram of the touch display panel provided in the embodiments of this application;

[0020] Figure 12 Another top view schematic diagram of the touch display panel provided in the embodiments of this application;

[0021] Figure 13 Another top view schematic diagram of the touch display panel provided in the embodiments of this application;

[0022] Figure 14 Another cross-sectional schematic diagram of the touch display panel provided in the embodiments of this application;

[0023] Figure 15 Another cross-sectional schematic diagram of the touch display panel provided in the embodiments of this application;

[0024] Figure 16 Another cross-sectional schematic diagram of the touch display panel provided in the embodiments of this application;

[0025] Figure 17 Another cross-sectional schematic diagram of the touch display panel provided in the embodiments of this application.

[0026] Figure 18 Another top view schematic diagram of the touch display panel provided in the embodiments of this application;

[0027] Figure 19 This is a schematic diagram of a touch display device provided in an embodiment of this application. Detailed Implementation

[0028] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0030] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0031] In the embodiments of this application, the term "electrical connection" can refer to two components being directly electrically connected, or it can refer to two components being electrically connected via one or more other components.

[0032] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this application can be combined with each other without contradiction.

[0033] Before describing the technical solutions provided in the embodiments of this application, in order to facilitate understanding of the embodiments of this application, this application first specifically explains the problems existing in the related technologies:

[0034] To enhance the display quality and aesthetics of touchscreen panels, increasing their size and resolution has become a primary research focus for engineers in the field, leading to increasingly larger touchscreen panel sizes. However, as the size of touchscreen panels increases, the number of touch electrodes also increases. Consequently, the number of touch traces connecting to these electrodes also increases, resulting in a decrease in the aperture ratio of the touchscreen panel.

[0035] In view of the inventors’ above-mentioned research findings, the present application provides a touch display panel and a touch display device that can solve the technical problem of low aperture ratio of touch display panels in related technologies.

[0036] The technical concept of this application embodiment is as follows: the touch display panel and touch display device are divided into a first display area and a second display area according to their distance from the bonding area. The first display area is far from the bonding area, and the second display area is close to the bonding area. The touch signal line electrically connected to the touch electrode in the first display area is the first touch signal line, and the touch signal line electrically connected to the touch electrode in the second display area is the second touch signal line. The width of the second touch signal line is smaller than the width of the first touch signal line. That is, the touch electrode in the second display area uses a thinner second touch signal line, or in other words, the width of the second touch signal line is reduced, thereby reducing the light obstruction of the second touch signal line and increasing the aperture ratio of the touch display panel and touch display device. On the other hand, the touch electrode in the first display area still uses a thicker first touch signal line, which can ensure that the impedance of the longer first touch signal line is small, and ensure that the touch electrode in the first display area has better touch sensitivity.

[0037] The touch display panel provided in the embodiments of this application will be described below.

[0038] Figure 1 This is a schematic diagram of a touch display panel provided in an embodiment of this application. Figure 1 As shown in the figure, the touch display panel 10 provided in this application embodiment may include a first display area A1, a second display area A2, and a bonding area BA arranged sequentially along the first direction Y. The bonding area BA is provided with touch pads (not shown in the figure), which are used to input touch driving signals. For example, in practical applications, the touch pads can be electrically connected to a flexible printed circuit (FPC) or a touch chip, and can be used to receive touch driving signals sent by the touch chip.

[0039] Both the first display area A1 and the second display area A2 can be provided with multiple touch electrodes 101. These touch electrodes 101 can be spaced apart and insulated from each other. The touch display panel 10 can also include multiple touch signal lines TP extending along a first direction Y and spaced apart along a second direction X. Touch pads can be electrically connected to the touch electrodes 101 through the touch signal lines TP. The first direction Y and the second direction X intersect. It is easily understood that both the first direction Y and the second direction X can be parallel to the plane of the touch display panel. For example, the first direction Y can be the column direction of the touch display panel, and the second direction X can be the row direction of the touch display panel.

[0040] For ease of explanation, the touch signal line TP electrically connected to the touch electrode 101 in the first display area A1 may be referred to as the first touch signal line TP1, and the touch signal line TP electrically connected to the touch electrode 101 in the second display area A2 may be referred to as the second touch signal line TP2. In this embodiment, the width of the second touch signal line TP2 is smaller than the width of the first touch signal line TP1, and the width is the minimum distance (i.e., vertical distance or straight-line distance) along the second direction X. That is, the line width of the second touch signal line TP2 is smaller than the line width of the first touch signal line TP1.

[0041] In this way, since the touch electrode 101 in the second display area A2 uses a thinner second touch signal line TP2, or in other words, the width of the second touch signal line TP2 is reduced, the obstruction of light by the second touch signal line TP2 can be reduced, thereby improving the aperture ratio of the touch display panel while ensuring touch performance.

[0042] Furthermore, compared to the second touch signal line TP2, the first touch signal line TP1 is longer, and the longer the trace, the greater the impedance. Therefore, the touch electrode 101 in the first display area A1 still uses the thicker first touch signal line TP1. For example, if the width of the first touch signal line TP1 remains unchanged, or the width of the first touch signal line TP1 is appropriately increased while ensuring the aperture ratio, the first touch signal line TP1 will have a larger cross-sectional area, thereby ensuring that the impedance of the longer first touch signal line TP1 is smaller, and ensuring that the touch electrode 101 in the first display area A1 has better touch sensitivity.

[0043] It should be noted that the division of the touch display panel into a first display area A1 and a second display area A2 in this embodiment is merely for ease of explanation. In practical applications, both the first display area A1 and the second display area A2 belong to the display area of ​​the touch display panel. The difference may only be that the first display area A1 is an area on the touch display panel that is farther from the bonding area (or touch chip), while the second display area A2 is an area on the touch display panel that is closer to the bonding area (or touch chip). The boundary between the first display area A1 and the second display area A2 may not be obvious.

[0044] Furthermore, the ratio of the area of ​​the first display area A1 to the area of ​​the second display area A2 is not limited in this embodiment. For example, the ratio of the area of ​​the first display area A1 to the area of ​​the second display area A2 can be 1:1, 1:2, 2:1, or other ratios. Figure 1As shown, for example, the width of the first display area A1 can be equal to the width of the second display area A2, and the ratio of the length L1 of the first display area A1 to the length L2 of the second display area A2 can be 1:1, 1:2, 2:1, or any other arbitrary ratio, which can be flexibly adjusted according to the actual situation. Here, the length is the minimum distance along the first direction Y (i.e., the vertical distance or the straight-line distance).

[0045] The arrangement of the first touch signal line TP1 and the second touch signal line TP2 is not limited in the embodiments of this application. For example... Figure 1 As shown, for example along the second direction X, the first touch signal line TP1 and the second touch signal line TP2 can be arranged alternately, that is, every other first touch signal line TP1 is set with a second touch signal line TP2; every other second touch signal line TP2 is set with a first touch signal line TP1.

[0046] Figure 2 This is another structural schematic diagram of the touch display panel provided in an embodiment of this application. For example... Figure 2 As shown, in other embodiments, for example, multiple second touch signal lines TP2 may be set along the second direction X, every multiple first touch signal lines TP1; and multiple first touch signal lines TP1 may be set every multiple second touch signal lines TP2. This application does not limit this aspect.

[0047] Further research by the inventors of this application revealed that as the size of touch display panels increases, the number of touch electrodes in the touch display panel also increases. Assume that the size of touch display panel A is larger than the size of touch display panel B, such as the height of touch display panel A being greater than the height of touch display panel B. If the number of pixel columns corresponding to a column of touch electrodes in touch display panel A is the same as the number of pixel columns corresponding to a column of touch electrodes in touch display panel B, for example, one column of touch electrodes corresponds to 40 pixels. Then, using the current method of setting one touch signal line per column of pixels to connect one touch electrode, a maximum of 40 touch electrodes can be set in one column. However, as the size of touch display panels increases, the number of touch electrodes in one column needs to exceed 40. Therefore, the current wiring method for touch signal lines cannot meet the needs of larger touch display panels.

[0048] Furthermore, the inventors of this application have discovered through further research that if the touch signal lines connected to two adjacent touch electrodes are close together, then when the two adjacent touch electrodes are touched, the touch signal lines connected to the two adjacent touch electrodes will couple with the same data signal line, increasing crosstalk to the data signal line and affecting display quality.

[0049] In view of the above findings, the present application proposes the following arrangement of the first touch signal line TP1 and the second touch signal line TP2.

[0050] Figure 3 This is another schematic diagram of the structure of a touch display panel provided in an embodiment of this application. For example... Figure 3 As shown, according to some embodiments of this application, optionally, both the first display area A1 and the second display area A2 may include a plurality of pixel units PX arranged along the second direction X. Specifically, both the first display area A1 and the second display area A2 may include a plurality of pixel rows arranged along the first direction Y, and each pixel row may include a plurality of pixel units PX arranged along the second direction X. Pixel units PX may include a plurality of sub-pixels px' arranged at intervals along the second direction X.

[0051] One pixel unit PX can correspond to two touch signal lines TP. Along the second direction X, the two touch signal lines TP corresponding to pixel unit PX can be located between different sub-pixels px' of pixel unit PX. For example, in some examples, the two touch signal lines TP corresponding to the i-th pixel unit PX can both be located between multiple sub-pixels px' in the i-th pixel unit PX. For example, one touch signal line TP is located between the first sub-pixel px' and the second sub-pixel px' in the i-th pixel unit PX, and the other touch signal line TP is located between the second sub-pixel px' and the third sub-pixel px' in the i-th pixel unit PX, where i is a positive integer. For example, in other examples, of the two touch signal lines TP corresponding to the i-th pixel unit PX, one touch signal line TP can be located between any two sub-pixels px' in the i-th pixel unit PX, and the other touch signal line TP can be located between the i-th pixel unit PX and the (i+1)-th pixel unit PX, with the i-th pixel unit PX and the (i+1)-th pixel unit PX being adjacent.

[0052] See also Figure 3 One of the two touch signal lines TP corresponding to pixel unit PX is the first touch signal line TP1, and the other touch signal line TP is the second touch signal line TP2. That is, of the two touch signal lines TP corresponding to pixel unit PX, one touch signal line TP is electrically connected to the touch electrode in the first display area A1, and the other touch signal line TP is electrically connected to the touch electrode in the second display area A2.

[0053] In this way, on the one hand, in addition to the existing one touch signal line TP corresponding to one pixel unit PX, an extra touch signal line TP is added, meaning that one pixel unit PX corresponds to two touch signal lines TP, thus meeting the requirement for the number of touch signal lines in the touch display panel and solving the problem of insufficient touch signal lines. On the other hand, the two touch signal lines TP corresponding to the pixel unit PX are of different thicknesses. The touch electrode in the second display area A2 uses the thinner second touch signal line TP2, reducing the light obstruction of the second touch signal line TP2 and increasing the aperture ratio of the touch display panel; the touch electrode in the first display area A1 still uses the thicker first touch signal line TP1, ensuring that the impedance of the longer first touch signal line TP1 is low, and ensuring that the touch electrode in the first display area A1 has good touch sensitivity. On the other hand, among the two adjacent touch signal lines TP corresponding to pixel unit PX, one touch signal line TP is electrically connected to the touch electrode in the first display area A1, and the other touch signal line TP is electrically connected to the touch electrode in the second display area A2. That is, the touch electrodes connected to the two adjacent touch signal lines TP are far apart. Therefore, the probability of the touch electrodes connected to the two adjacent touch signal lines TP being touched at the same time is very small. This effectively avoids the coupling between two adjacent touch signal lines and the same data signal line, reduces crosstalk to the data signal line, and improves the display quality.

[0054] Figure 4 This is another schematic diagram of the structure of a touch display panel provided in an embodiment of this application. For example... Figure 4 As shown, according to some embodiments of this application, optionally, the second touch signal line TP2 and the touch electrode 101 can be located in different film layers, and the specific film layer structure will be described below. The second touch signal line TP2 can be electrically connected to the touch electrode 101 through the first via k1 and then cut off along the first direction Y. That is, the second touch signal line TP2 is cut off immediately after being electrically connected to the touch electrode 101 through the first via k1, such as the second touch signal line TP2 being cut off immediately after being electrically connected to the touch electrode 101 or extending to the edge of the correspondingly connected touch electrode 101. For example, the first end of the second touch signal line TP2 is electrically connected to the touch pad, and the distance between the second end of the second touch signal line TP2 and the first via k1 is less than a preset distance threshold. For example, the preset distance threshold is, for example, the length of n pixel units, where n is a positive integer. The size of the preset distance threshold can be flexibly adjusted according to the actual situation, and this application embodiment does not limit it.

[0055] Furthermore, after the first touch signal line TP1 is electrically connected to the touch electrode 101 through the second via k2, it can also be cut off along the first direction Y, or it can extend to the edge of the first display area A1 away from the second display area A2 (e.g., Figure 4The upper edge shown is not limited in this embodiment of the application.

[0056] It should be noted that, in this embodiment, each second touch signal line TP2 can be electrically connected to the touch electrode 101 through one first via k1, or through multiple first via k1, thereby increasing the stability of the electrical connection. Similarly, each first touch signal line TP1 can be electrically connected to the touch electrode 101 through one second via k2, or through multiple second via k2. For example, in Figure 4 In the embodiment shown, each second touch signal line TP2 can be electrically connected to the touch electrode 101 through two first vias k1, and each first touch signal line TP1 can be electrically connected to the touch electrode 101 through two second vias k2.

[0057] Figure 5 This is another schematic diagram of the structure of a touch display panel provided in an embodiment of this application. For example... Figure 5 As shown, with Figure 4 Unlike the illustrated embodiment, in some other embodiments of this application, optionally, after the second touch signal line TP2 is electrically connected to the touch electrode 101 through the first via k1, it can extend to the edge of the second display area A2 near the first display area A1 and then terminate. That is, along the first direction Y, the second touch signal line TP2 can pass through the entire second display area A2.

[0058] Furthermore, after the first touch signal line TP1 is electrically connected to the touch electrode 101 through the second via k2, it can be cut off along the first direction Y, or it can extend to the edge of the first display area A1 away from the second display area A2 (e.g., Figure 5 The upper edge shown is not limited in this embodiment of the application.

[0059] See also Figure 4 or Figure 5 According to some embodiments of this application, optionally, the touch display panel 10 may further include a dummy touch signal line TP', which is electrically connected to the touch electrode 101. Along a direction perpendicular to the plane of the touch display panel, the dummy touch signal line TP' may overlap with the touch electrode 101. One second touch signal line TP2 may correspond to at least one dummy touch signal line TP'. Along the first direction Y, at least one dummy touch signal line TP' corresponding to the second touch signal line TP2 may be located on the side of the second touch signal line TP2 away from the bonding area BA. Along the first direction Y, at least one dummy touch signal line TP' corresponding to the second touch signal line TP2 may be located on the same straight line as the second touch signal line TP2. The number of dummy touch signal lines TP' corresponding to different second touch signal lines TP2 may be the same or different. Figure 4For example, the first second touch signal line TP2 from the left can correspond to 3 dummy touch signal lines TP', and the second second touch signal line TP2 from the left can correspond to 2 dummy touch signal lines TP'. However, the 3 dummy touch signal lines TP' corresponding to the first second touch signal line TP2 can be connected together, so the number of dummy touch signal lines TP' corresponding to the first second touch signal line TP2 becomes 1. Similarly, the 2 dummy touch signal lines TP' corresponding to the second second touch signal line TP2 can also be connected together, so the number of dummy touch signal lines TP' corresponding to the second second touch signal line TP2 also becomes 1.

[0060] In some specific examples, the width of the dummy touch signal line TP' can be the same as the width of the second touch signal line TP2 to increase the aperture ratio of the touch display panel.

[0061] like Figure 4 or Figure 5 As shown, the touch display panel 10 may further include multiple data signal lines data, which extend along a first direction Y and are spaced apart along a second direction X. Each data signal line data can be electrically connected to a column of sub-pixels to provide data signals. Since the data signal lines data are adjacent to the touch signal lines TP (including the first touch signal line TP1 and the second touch signal line TP2), coupling occurs between the data signal lines data and the touch signal lines TP. When the lengths of the touch signal lines TP corresponding to adjacent data signal lines data are different, the coupling capacitance generated on the adjacent data signal lines data is also different, leading to display differences. By adding a dummy touch signal line TP', on the one hand, it ensures that the pixels in different areas of the touch display panel 10 have the same microscopic surface morphology; on the other hand, it ensures that the potential and electric field in different areas of the touch display panel 10 are also basically the same. For example, the dummy touch signal line TP' is connected to the corresponding touch electrode or the common electrode line around the display area through vias or bridges, ensuring that the potential of the dummy touch signal line TP' and the touch signal line TP are the same potential during display, and that the potential of the dummy touch signal line TP' and the touch signal line TP during touch is the same as the potential of the electrically connected touch electrode. Since the potential of the dummy touch signal line TP' is the same as or close to the potential of the touch signal line TP, and the sum of the lengths of the touch signal lines TP and dummy touch signal lines TP' corresponding to adjacent data signal lines data is the same as or close to the same, the coupling capacitance generated on adjacent data signal lines data is the same as or close to the same, thus improving the display quality.

[0062] Figure 6 This is another schematic diagram of the structure of a touch display panel provided in an embodiment of this application. For example... Figure 6 As shown, with Figure 4and Figure 5 Unlike the illustrated embodiment, in some other embodiments of this application, optionally, after the second touch signal line TP2 is electrically connected to the touch electrode 101 through the first via k1, it can also extend to the first display area A1 and then be cut off. For example, the second touch signal line TP2 can extend to the edge of the first display area A1 away from the second display area A2 (e.g., Figure 6 (as shown at the upper edge), of course, the second touch signal line TP2 can also extend to any position in the first display area A1 and terminate there. This application embodiment does not limit this.

[0063] Furthermore, after the first touch signal line TP1 is electrically connected to the touch electrode 101 through the second via k2, it can be cut off along the first direction Y, or it can extend to the edge of the first display area A1 away from the second display area A2 (e.g., Figure 6 The upper edge shown is not limited in this embodiment of the application.

[0064] In some specific embodiments, optionally, the length of the second touch signal line TP2 can be the same as the length of the first touch signal line TP1, which is the minimum distance along the first direction Y. For example, both the first touch signal line TP1 and the second touch signal line TP2 can extend to the edge of the first display area A1 away from the second display area A2 (e.g., Figure 6 (as shown by the upper edge).

[0065] In this way, since the length of the second touch signal line TP2 is the same as the length of the first touch signal line TP1, there is no need to set up an additional dummy touch signal line TP'. This also ensures that the coupling capacitance generated on the adjacent data signal lines is the same or similar, thus ensuring that the touch display panel has good display quality.

[0066] It should be noted that the length of the second touch signal line TP2 being the same as the length of the first touch signal line TP1 can include the case where the length of the second touch signal line TP2 is exactly the same as the length of the first touch signal line TP1, or it can include the case where there is a processing error between the length of the second touch signal line TP2 and the length of the first touch signal line TP1.

[0067] Figure 7 This is a top view schematic diagram of a touch display panel provided in an embodiment of this application. Figure 8 This is a partial cross-sectional schematic diagram of a touch display panel provided in an embodiment of this application. (In conjunction with...) Figure 7 and Figure 8As shown, according to some embodiments of this application, optionally, the touch display panel 10 may further include a black matrix BM. Both the first display area A1 and the second display area A2 may include a plurality of pixel units PX arranged along the second direction X, and each pixel unit PX may include a plurality of sub-pixels px' spaced apart along the second direction X by the black matrix BM. Along the direction Z perpendicular to the plane of the touch display panel, the touch signal line TP may at least partially overlap with the black matrix BM. The touch signal line TP includes a first touch signal line TP1 and a second touch signal line TP2. The at least partial overlap between the touch signal line TP and the black matrix BM may include the orthographic projection of the black matrix BM completely covering the touch signal line TP along the direction Z perpendicular to the plane of the touch display panel, or it may include the touch signal line TP only partially overlapping the black matrix BM along the direction Z perpendicular to the plane of the touch display panel. This application does not limit this aspect.

[0068] In this way, since the black matrix BM itself has poor light transmittance, placing the touch signal line TP in an area that at least partially overlaps with the black matrix BM can reduce the proportion of areas with low light transmittance in the touch display panel and further improve the aperture ratio of the touch display panel.

[0069] Figure 9 This is another top view schematic diagram of the touch display panel provided in the embodiments of this application. Figure 10 This is another partial cross-sectional schematic diagram of the touch display panel provided in an embodiment of this application. (In conjunction with...) Figure 9 and Figure 10 As shown, according to some embodiments of this application, optionally, the pixel unit PX may include a first color sub-pixel px1, a second color sub-pixel px2, and a third color sub-pixel px3 arranged at intervals along the second direction X. Along the second direction X, the width w1' of the black matrix BM adjacent to the first color sub-pixel px1, the width w2' of the black matrix BM adjacent to the second color sub-pixel px2, and the width w3' of the black matrix BM adjacent to the third color sub-pixel px3 may all be different. It should be noted that the black matrix BM adjacent to the first color sub-pixel px1 may be... Figure 9 The black matrix BM adjacent to the right of the first color sub-pixel px1 shown can also be the black matrix BM adjacent to the left of the first color sub-pixel px1 in other examples. Similarly, when the black matrix BM adjacent to the first color sub-pixel px1 is the black matrix BM adjacent to the left of the first color sub-pixel px1, the black matrix BM adjacent to the second color sub-pixel px2 can be the black matrix BM adjacent to the left of the second color sub-pixel px2, and the black matrix BM adjacent to the third color sub-pixel px3 can be the black matrix BM adjacent to the left of the third color sub-pixel px3.

[0070] One pixel unit PX can correspond to one first touch signal line TP1 and one second touch signal line TP2. Along the direction Z perpendicular to the plane of the touch display panel, the first touch signal line TP1 can at least partially overlap with the widest black matrix among the black matrices BM adjacent to the first color sub-pixel px1, the second color sub-pixel px2, and the third color sub-pixel px3. Along the direction Z perpendicular to the plane of the touch display panel, the second touch signal line TP2 can at least partially overlap with the second widest black matrix among the black matrices BM adjacent to the first color sub-pixel px1, the second color sub-pixel px2, and the third color sub-pixel px3.

[0071] For example, the width w3' of the black matrix BM adjacent to the third color sub-pixel px3 is greater than the width w2' of the black matrix BM adjacent to the second color sub-pixel px2, and the width w2' of the black matrix BM adjacent to the second color sub-pixel px2 is greater than the width w1' of the black matrix BM adjacent to the first color sub-pixel px1. Therefore, along the direction Z perpendicular to the plane of the touch display panel, the first touch signal line TP1 can at least partially overlap with the black matrix BM adjacent to the third color sub-pixel px3, and the second touch signal line TP2 can at least partially overlap with the black matrix BM adjacent to the first color sub-pixel px1.

[0072] In this way, since the first touch signal line TP1 overlaps at least partially with the black matrix BM with the largest width among the black matrices adjacent to the first color sub-pixel px1, the second color sub-pixel px2, and the third color sub-pixel px3, and the second touch signal line TP2 overlaps at least partially with the black matrix with the second widest width among the black matrices BM with the first color sub-pixel px1, the second color sub-pixel px2, and the third color sub-pixel px3, that is, the first touch signal line TP1 and the second touch signal line TP2 are set below the black matrices BM with the first and second widest widths, it can be ensured that the first touch signal line TP1 and the second touch signal line TP2 overlap with the black matrices BM as much as possible, which greatly reduces the proportion of areas with low light transmittance in the touch display panel and further improves the aperture ratio of the touch display panel.

[0073] See also Figure 9According to some embodiments of this application, optionally, along the second direction X, the width of the black matrix BM between the third color sub-pixel px3 and the first color sub-pixel px1 in the adjacent pixel unit PX is a first width W1, the width of the black matrix BM between the third color sub-pixel px3 and the second color sub-pixel px2 is a second width W2, and the width of the black matrix BM between the second color sub-pixel px2 and the first color sub-pixel px1 is a third width W3. Wherein, the first width W1 > the second width W2 > the third width W3. Exemplarily, the first color sub-pixel px1 may include a red sub-pixel, the second color sub-pixel px2 may include a green sub-pixel, and the third color sub-pixel px3 may include a blue sub-pixel. That is, in Figure 9 In the illustrated embodiment, the black matrix BM between the blue sub-pixel and the red sub-pixel is the widest, the black matrix BM between the blue sub-pixel and the green sub-pixel is the second widest, and the black matrix BM between the red sub-pixel and the green sub-pixel is the narrowest.

[0074] The advantage of this setup is that, since the human eye has different sensitivities to different colors, such as being least sensitive to blue, black matrices BM with the first and second widest widths are set on the left and right sides of the blue sub-pixel, respectively. Below the first and second widest black matrices BM, the first touch signal line TP1 and the second touch signal line TP2 are set, respectively. The influence of the first touch signal line TP1 and the second touch signal line TP2 on the light emission of the blue sub-pixel is not easily perceived by the human eye, thus ensuring a better display effect.

[0075] Figure 11 This is another top view schematic diagram of the touch display panel provided in an embodiment of this application. (See attached diagram.) Figure 11 As shown, with Figure 9 Unlike the illustrated embodiment, in some other embodiments of this application, optionally, the second width W2 > the first width W1 > the third width W3. Taking the example of the first color sub-pixel px1 being a red sub-pixel, the second color sub-pixel px2 being a green sub-pixel, and the third color sub-pixel px3 being a blue sub-pixel, that is, in... Figure 11 In the illustrated embodiment, the black matrix BM between the blue sub-pixel and the green sub-pixel is the widest, the black matrix BM between the blue sub-pixel and the red sub-pixel is the second widest, and the black matrix BM between the red sub-pixel and the green sub-pixel is the narrowest.

[0076] Similarly, black matrices BM with the first and second widest widths are set on the left and right sides of the blue sub-pixel, respectively, and a first touch signal line TP1 and a second touch signal line TP2 are set below the first and second widest black matrices BM, respectively. Even if the first touch signal line TP1 and the second touch signal line TP2 malfunction or affect the light emission of the blue sub-pixel, the human eye will not easily notice it, thus ensuring a good display effect.

[0077] In other embodiments, optionally, the first width W1 > the third width W3 > the second width W2. Taking the first color sub-pixel px1 as the red sub-pixel, the second color sub-pixel px2 as the green sub-pixel, and the third color sub-pixel px3 as the blue sub-pixel as an example, the black matrix BM between the blue and red sub-pixels is the widest, the black matrix BM between the red and green sub-pixels is the second widest, and the black matrix BM between the blue and green sub-pixels is the narrowest. Thus, placing the first touch signal line TP1 and the second touch signal line TP2 below the black matrix BM adjacent to the blue sub-pixel and the black matrix BM adjacent to the red sub-pixel, respectively, can achieve a similar effect.

[0078] Figure 12 This is another top view schematic diagram of the touch display panel provided in an embodiment of this application. (See attached diagram.) Figure 12 As shown, according to some embodiments of this application, optionally, along the second direction X, the distance between the center point of the first color sub-pixel px1 and the center point of the second color sub-pixel px2 is a first distance h1, and the distance between the center point of the second color sub-pixel px2 and the center point of the third color sub-pixel px3 is a second distance h2. The first distance h1 may not be equal to the second distance h2. The pixel opening sizes of the first color sub-pixel px1, the second color sub-pixel px2, and the third color sub-pixel px1 may be the same. Along the direction perpendicular to the plane of the touch display panel, the black matrix BM with the largest width can completely block the first touch signal line TP1, and the black matrix BM with the second largest width can completely block the second touch signal line TP2. That is, by adjusting the width of the black matrix BM, the black matrix BM with the largest width can completely block the first touch signal line TP1, and the black matrix BM with the second largest width can completely block the second touch signal line TP2.

[0079] Figure 13 This is another top view schematic diagram of the touch display panel provided in an embodiment of this application. (See attached diagram.) Figure 13 As shown, with Figure 12Unlike the illustrated embodiment, according to other embodiments of this application, optionally, along the second direction X, the distance between the center point of the first color sub-pixel px1 and the center point of the second color sub-pixel px2 is a first distance h1, and the distance between the center point of the second color sub-pixel px2 and the center point of the third color sub-pixel px3 is a second distance h2. The first distance h1 and the second distance h2 can be equal. The pixel opening sizes of the first color sub-pixel px1, the second color sub-pixel px2, and the third color sub-pixel px3 can be different. Along the direction perpendicular to the plane of the touch display panel, the black matrix BM with the largest width completely blocks the first touch signal line TP1, and the black matrix BM with the second largest width completely blocks the second touch signal line TP2. That is, in Figure 13 In the embodiment shown, the pixel openings of the first color sub-pixel px1, the second color sub-pixel px2, and the third color sub-pixel px3 can be adjusted so that the black matrix BM with the largest width completely blocks the first touch signal line TP1, and the black matrix BM with the second largest width completely blocks the second touch signal line TP2.

[0080] It should be noted that although the above description uses the example of a pixel unit PX including a first color sub-pixel px1, a second color sub-pixel px2, and a third color sub-pixel px3, the pixel unit PX is not limited to including the first color sub-pixel px1, the second color sub-pixel px2, and the third color sub-pixel px3; it can also include other color sub-pixels. For example, a pixel unit PX can include a red sub-pixel R, a green sub-pixel G, a blue sub-pixel B, and a white sub-pixel W; or, a pixel unit PX can include a red sub-pixel R, a green sub-pixel G, a blue sub-pixel B, and a yellow sub-pixel Y. When using an RGBW or RGBY design, the settings can also be configured as described above in the embodiments of this application.

[0081] The following examples illustrate the film layer distribution of the touch display panel in this application.

[0082] Figure 14 This is yet another cross-sectional view of the touch display panel provided in an embodiment of this application. For example... Figure 14As shown, according to some embodiments of this application, optionally, the touch display panel 10 may include an array substrate 01, a color filter substrate 02, and a liquid crystal layer 03 sandwiched between the array substrate 01 and the color filter substrate 02. The array substrate 01 may include a first substrate 141, a driving device layer 142, a first electrode layer 143, a first insulating layer 144, and a second electrode layer 145 stacked together. The second electrode layer 145 may be located on the side of the first electrode layer 143 near the liquid crystal layer 03. The touch signal line TP may be located on the driving device layer 142, and the touch electrode 101 may be located on the first electrode layer 143 or the second electrode layer 145. The touch signal line TP and the touch electrode 101 are connected through vias.

[0083] In this way, by reusing the first electrode layer 143 or the second electrode layer 145 for the touch electrode 101 and reusing the driving device layer 142 for the touch signal line TP, the number and thickness of the film layers of the touch display panel can be reduced, which is conducive to simplifying the production process and reducing production costs.

[0084] In some examples, both the first electrode layer 143 and the second electrode layer 145 can be transparent electrode layers, such as transparent metal oxide electrode layers like indium tin oxide or antimony tin oxide, to improve the light transmittance of the touch display panel.

[0085] See also Figure 14 In some specific examples, optionally, the first electrode layer 143 is provided with a pixel electrode p, and the second electrode layer 145 is provided with a common electrode com. The touch electrode 101 can reuse the common electrode, and the touch signal line TP is electrically connected to the common electrode com in the second electrode layer 145 through a via. The pixel electrode p can receive a pixel voltage signal, and the common electrode com can receive a constant common voltage signal. Both the pixel electrode p and the common electrode com are disposed on the same side of the liquid crystal layer 03, i.e., on the array substrate 01, to form a touch display panel in Fringe Field Switching (FFS) mode. The common electrode com can be block-shaped, and one common electrode com can cover multiple sub-pixels. During the display phase, the common electrode com receives the common voltage signal and is used as a common electrode; during the touch phase, the common electrode com receives the touch drive signal and is used as a touch electrode.

[0086] The driving device layer 142 may include an active layer 1421, a first metal layer 1422, a second metal layer 1423, and an insulating layer sandwiched between any two adjacent film layers. The first metal layer 1422 may be used to set the gate signal line and the gate of the transistor, and the second metal layer 1423 may be used to set the source and drain of the transistor. The touch signal line TP may specifically reuse the second metal layer 1423.

[0087] In this way, by reusing the second electrode layer 145 for the touch electrode 101 and reusing the second metal layer 1423 for the touch signal line TP, the number and thickness of the film layers in the touch display panel can be reduced, which is conducive to simplifying the production process and reducing production costs.

[0088] Figure 15 This is yet another cross-sectional view of the touch display panel provided in an embodiment of this application. For example... Figure 15 As shown, with Figure 14 Unlike the illustrated embodiment, according to other embodiments of this application, the array substrate 01 may optionally include a target wiring layer 1501. Along the direction Z perpendicular to the plane of the touch display panel, the target wiring layer 1501 is located between the driver device layer 142 and the first electrode layer 143, such as between the second metal layer 1423 and the first electrode layer 143. An insulating layer is provided between the target wiring layer 1501 and the driver device layer 142 along the direction Z perpendicular to the plane of the touch display panel, and an insulating layer is also provided between the target wiring layer 1501 and the first electrode layer 143. That is, an additional metal wiring layer, namely the target wiring layer 1501, is added between the driver device layer 142 and the first electrode layer 143.

[0089] Optionally, the touch signal line TP can be located in the target trace layer 1501 and along the direction Z perpendicular to the plane of the touch display panel. The touch signal line TP can overlap, such as partially or completely, with at least one of the source, drain, and data signal line data of the transistor in the driving device layer 142. For example, in some embodiments, the data signal line data can be located in the second metal layer 1423 with the source and drain of the transistor, and the data signal line data can be electrically connected to the source or drain of the transistor. Along the direction Z perpendicular to the plane of the touch display panel, the touch signal line TP can at least partially overlap with the data signal line data. The touch electrode 101 can reuse a common electrode, and the touch signal line TP is electrically connected to the common electrode com in the second electrode layer 145 through a via.

[0090] By placing the touch signal line TP in an area that at least partially overlaps with the data signal line data, the proportion of areas with low light transmittance in the touch display panel can be reduced, further increasing the aperture ratio of the touch display panel.

[0091] Figure 16 This is yet another cross-sectional view of the touch display panel provided in an embodiment of this application. For example... Figure 16As shown, in another specific example, optionally, the first electrode layer 143 may be provided with a common electrode com, the second electrode layer 145 may be provided with a pixel electrode p, the touch electrode 101 may reuse the common electrode com, and the touch signal line TP may be electrically connected to the common electrode com in the first electrode layer 143 through a via.

[0092] In this design, pixel electrode p receives pixel voltage signals, and common electrode com receives a constant common voltage signal. Both pixel electrode p and common electrode com are disposed on the same side of the liquid crystal layer 03, i.e., on the array substrate 01, to form a touch display panel in Fringe Field Switching (FFS) mode. Common electrode com can be block-shaped, and one common electrode com can cover multiple sub-pixels. During the display phase, common electrode com receives the common voltage signal and is used as a common electrode; during the touch phase, common electrode com receives touch drive signals and is used as a touch electrode.

[0093] The driving device layer 142 may include an active layer 1421, a first metal layer 1422, a second metal layer 1423, and an insulating layer sandwiched between any two adjacent film layers. The first metal layer 1422 may be used to set the gate signal line and the gate of the transistor, and the second metal layer 1423 may be used to set the source and drain of the transistor. The touch signal line TP may specifically reuse the second metal layer 1423.

[0094] In this way, by reusing the first electrode layer 143 for the touch electrode 101 and reusing the second metal layer 1423 for the touch signal line TP, the number and thickness of the film layers in the touch display panel can be reduced, which is conducive to simplifying the production process and reducing production costs.

[0095] Figure 17 This is yet another cross-sectional view of the touch display panel provided in an embodiment of this application. For example... Figure 17 As shown, with Figure 16 Unlike the illustrated embodiment, according to some other embodiments of this application, optionally, the array substrate 01 may further include a target wiring layer 1501. Along the direction Z perpendicular to the plane of the touch display panel, the target wiring layer 1501 is located between the driver device layer 142 and the first electrode layer 143, such as between the second metal layer 1423 and the first electrode layer 143. An insulating layer is provided between the target wiring layer 1501 and the driver device layer 142 along the direction Z perpendicular to the plane of the touch display panel, and an insulating layer is also provided between the target wiring layer 1501 and the first electrode layer 143. That is, an additional metal wiring layer, namely the target wiring layer 1501, is added between the driver device layer 142 and the first electrode layer 143.

[0096] Optionally, the touch signal line TP can be located in the target trace layer 1501 and along the direction Z perpendicular to the plane of the touch display panel. The touch signal line TP can overlap, such as partially or completely, with at least one of the source, drain, and data signal line data of the transistor in the driving device layer 142. For example, in some embodiments, the data signal line data can be located in the second metal layer 1423 with the source and drain of the transistor, and the data signal line data can be electrically connected to the source or drain of the transistor. Along the direction Z perpendicular to the plane of the touch display panel, the touch signal line TP can at least partially overlap with the data signal line data. The touch electrode 101 can reuse a common electrode, and the touch signal line TP is electrically connected to the common electrode com in the first electrode layer 143 through a via.

[0097] By placing the touch signal line TP in an area that at least partially overlaps with the data signal line data, the proportion of areas with low light transmittance in the touch display panel can be reduced, further increasing the aperture ratio of the touch display panel.

[0098] It should be noted that, although Figures 14 to 17 The transistors shown are all top-gate structures, that is, the gate of the transistor is located on the side of the active layer away from the first substrate 141. However, it is understood that the transistors in the touch display panel of the present application embodiment can also adopt a bottom-gate structure, that is, the gate of the transistor is located on the side of the active layer facing the first substrate 141, or the gate of the transistor is located below the active layer. The present application embodiment does not limit this.

[0099] Figure 18 This is another top view schematic diagram of the touch display panel provided in an embodiment of this application. (See attached diagram.) Figure 18 As shown, according to some embodiments of this application, optionally, the touch display panel can be a self-capacitive touch display panel. Specifically, the touch electrodes 101 are electrically connected to the touch signal lines TP one-to-one, and each touch electrode 101 can be connected to the touch chip 160 through the corresponding touch signal line TP. The touch signal line TP is used to send the touch driving signal issued by the touch chip 160 to the corresponding touch electrode 101, and to transmit the touch sensing signal generated by the corresponding touch electrode 101 back to the touch chip 160.

[0100] In some specific examples, the touch chip 160 can be a touch display chip that integrates display and touch functions.

[0101] Based on the touch display panel 10 provided in the above embodiments, correspondingly, this application also provides a touch display device, including the display panel 10 provided in this application embodiment. Please refer to... Figure 19 , Figure 19This is a schematic diagram of a touch display device provided in an embodiment of this application. Figure 19 The provided touch display device 1000 includes the touch display panel 10 provided in any of the above embodiments of this application. Figure 19 The embodiments use a mobile phone as an example to describe the touch display device 1000. It is understood that the touch display device provided in this application embodiment can be other touch display devices with display functions, such as wearable products, computers, televisions, and automotive touch display devices; this application does not impose specific limitations on these. The touch display device provided in this application embodiment has the beneficial effects of the touch display panel 10 provided in this application embodiment. For details, please refer to the specific descriptions of the touch display panel 10 in the above embodiments; these will not be repeated here.

[0102] It should be understood that the specific structures of the touch display panels provided in the accompanying drawings of the embodiments of this application are merely examples and are not intended to limit this application. Furthermore, the above embodiments provided in this application can be combined with each other unless there is contradiction.

[0103] The embodiments described above are not exhaustive, nor do they limit the application to the specific embodiments described herein. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

[0104] It should be clarified that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. For the display panel embodiments and display device embodiments, relevant parts can be referred to the description sections of the pixel driving circuit embodiments and array substrate embodiments. This application is not limited to the specific structures described above and shown in the figures. Those skilled in the art can make various changes, modifications, and additions after understanding the spirit of this application. Furthermore, for the sake of brevity, detailed descriptions of known technologies are omitted here.

[0105] Those skilled in the art will understand that the above embodiments are exemplary and not restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on a study of the drawings, specification, and claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other structures; the quantity refers to "one" but does not exclude multiple; the terms "first" and "second" are used to identify names and not to indicate any particular order. Any reference numerals in the claims should not be construed as limiting the scope of protection. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A touch display panel, characterized in that, The touch display panel includes a first display area, a second display area, and a bonding area arranged along a first direction, wherein the first display area is located on the side of the second display area away from the bonding area, and the bonding area is provided with touch pads, which are used to input touch driving signals; Both the first display area and the second display area are provided with multiple touch electrodes; The touch display panel further includes a plurality of touch signal lines extending along the first direction and spaced apart along the second direction. The touch pads are electrically connected to the touch electrodes through the touch signal lines. The first direction and the second direction intersect. The touch signal line electrically connected to the touch electrode in the first display area is the first touch signal line, and the touch signal line electrically connected to the touch electrode in the second display area is the second touch signal line. The width of the second touch signal line is smaller than the width of the first touch signal line, and the width is the minimum distance along the second direction. The touch display panel also includes a dummy touch signal line, which is electrically connected to the corresponding touch electrode; One second touch signal line corresponds to at least one virtual touch signal line; multiple virtual touch signal lines corresponding to one second touch signal line are connected together to form one; the virtual touch signal line corresponding to one second touch signal line overlaps with multiple touch electrodes; along the first direction, at least one virtual touch signal line corresponding to the second touch signal line is located on the side of the second touch signal line away from the bonding area; and along a direction perpendicular to the plane of the touch display panel, the virtual touch signal line at least partially overlaps with the touch electrode; the width of the virtual touch signal line is the same as the width of the second touch signal line. Along a direction perpendicular to the plane of the touch display panel, the touch signal line and the data signal line at least partially overlap; the sum of the lengths of the touch signal line and the dummy signal line corresponding to adjacent data signal lines is the same; The potential of the dummy touch signal line and the touch signal line is the same as the potential of the electrically connected touch electrode when the touch is applied.

2. The touch display panel according to claim 1, characterized in that, Both the first display area and the second display area include a plurality of pixel units arranged along the second direction, and the pixel unit includes a plurality of sub-pixels arranged at intervals along the second direction; The pixel unit corresponds to two touch signal lines, and along the second direction, the two touch signal lines corresponding to the pixel unit are respectively located between different sub-pixels of the pixel unit; One of the two touch signal lines corresponding to the pixel unit is the first touch signal line, and the other touch signal line is the second touch signal line.

3. The touch display panel according to claim 2, characterized in that, The second touch signal line and the touch electrode are located on different film layers. After being electrically connected to the touch electrode through the first via, the second touch signal line is cut off along the first direction.

4. The touch display panel according to claim 2, characterized in that, The second touch signal line is located on a different film layer from the touch electrode. After being electrically connected to the touch electrode through the first via, the second touch signal line extends to the edge of the second display area near the first display area and then terminates.

5. The touch display panel according to claim 1, characterized in that, The touch display panel also includes a black matrix; Both the first display area and the second display area include a plurality of pixel units arranged along the second direction, and the pixel unit includes a plurality of sub-pixels separated by the black matrix along the second direction; Along a direction perpendicular to the plane of the touch display panel, the touch signal line at least partially overlaps with the black matrix.

6. The touch display panel according to claim 5, characterized in that, The pixel unit includes a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel arranged at intervals along the second direction; Along the second direction, the widths of the black matrices adjacent to the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are all different. The pixel unit corresponds to a first touch signal line and a second touch signal line. Along the direction perpendicular to the plane where the touch display panel is located, the first touch signal line at least partially overlaps with the black matrix with the largest width among the black matrices adjacent to the first color sub-pixel, the black matrices adjacent to the second color sub-pixel, and the black matrices adjacent to the third color sub-pixel. The second touch signal line at least partially overlaps with the black matrix with the second widest width among the black matrices adjacent to the first color sub-pixel, the black matrices adjacent to the second color sub-pixel, and the black matrices adjacent to the third color sub-pixel.

7. The touch display panel according to claim 6, characterized in that, Along the second direction, the width of the black matrix between the third color sub-pixel and the first color sub-pixel in the adjacent pixel unit is a first width, the width of the black matrix between the third color sub-pixel and the second color sub-pixel is a second width, and the width of the black matrix between the second color sub-pixel and the first color sub-pixel is a third width. Wherein, the first width > the second width > the third width; Alternatively, the second width > the first width > the third width; Alternatively, the first width > the third width > the second width; The first color sub-pixel includes a red sub-pixel, the second color sub-pixel includes a green sub-pixel, and the third color sub-pixel includes a blue sub-pixel.

8. The touch display panel according to claim 6, characterized in that, Along the second direction, the distance between the center point of the first color sub-pixel and the center point of the second color sub-pixel is the first distance, and the distance between the center point of the second color sub-pixel and the center point of the third color sub-pixel is the second distance. The first distance and the second distance are not equal. The pixel apertures of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel have the same size; Along a direction perpendicular to the plane where the touch display panel is located, the black matrix with the largest width completely blocks the first touch signal line, and the black matrix with the second largest width completely blocks the second touch signal line.

9. The touch display panel according to claim 6, characterized in that, Along the second direction, the distance between the center point of the first color sub-pixel and the center point of the second color sub-pixel is the first distance, and the distance between the center point of the second color sub-pixel and the center point of the third color sub-pixel is the second distance, wherein the first distance and the second distance are equal; The pixel apertures of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel have different sizes; Along a direction perpendicular to the plane where the touch display panel is located, the black matrix with the largest width completely blocks the first touch signal line, and the black matrix with the second largest width completely blocks the second touch signal line.

10. The touch display panel according to claim 1, characterized in that, The touch display panel includes an array substrate, a color filter substrate, and a liquid crystal layer sandwiched between the array substrate and the color filter substrate. The array substrate includes a first substrate, a driving device layer, a first electrode layer, a first insulating layer, and a second electrode layer stacked together, wherein the second electrode layer is located on the side of the first electrode layer close to the liquid crystal layer; The touch signal line is located in the driving device layer, and the touch electrode is located in the first electrode layer or the second electrode layer.

11. The touch display panel according to claim 1, characterized in that, The touch display panel includes an array substrate, a color filter substrate, and a liquid crystal layer sandwiched between the array substrate and the color filter substrate. The array substrate includes a first substrate, a driving device layer, a target wiring layer, a first electrode layer, a first insulating layer, and a second electrode layer stacked together, wherein the second electrode layer is located on the side of the first electrode layer close to the liquid crystal layer; The touch signal line is located in the target trace layer, and the touch electrode is located in the first electrode layer or the second electrode layer.

12. The touch display panel according to claim 10 or 11, characterized in that, The first electrode layer is provided with pixel electrodes, the second electrode layer is provided with a common electrode, the touch electrode reuses the common electrode, and the touch signal line is electrically connected to the common electrode in the second electrode layer through a via.

13. The touch display panel according to claim 10 or 11, characterized in that, The first electrode layer is provided with a common electrode, the second electrode layer is provided with a pixel electrode, the touch electrode reuses the common electrode, and the touch signal line is electrically connected to the common electrode in the first electrode layer through a via.

14. The touch display panel according to claim 11, characterized in that, The driving device layer is provided with transistor source and drain, and the touch display panel also includes data signal lines, which are on the same layer as the transistor source and drain.

15. The touch display panel according to claim 1, characterized in that, The touch electrodes are electrically connected to the touch signal lines one by one. The touch electrodes are connected to the touch chip through the corresponding touch signal lines. The touch signal lines are used to send the touch driving signals issued by the touch chip to the corresponding touch electrodes and to transmit the touch sensing signals generated by the corresponding touch electrodes back to the touch chip.

16. A touch display device, characterized in that, Includes a touch display panel as claimed in any one of claims 1 to 15.

Images