CN116820275A - Touch display panel and touch display device - Google Patents

Abstract

The embodiment of the application discloses a touch display panel and a touch display device. The touch display panel comprises a touch electrode and a touch wire; the touch control wiring comprises a first connecting part and a wiring part, and the first connecting part is respectively and electrically connected with the touch control electrode and the wiring part; the line width of the first connecting part is smaller than or equal to the line width of the wiring part. Through the scheme, the resistance of the first connecting part can be increased, the resistance difference between the first connecting part and the touch electrode is reduced, the gradual change of the resistances of the touch wiring and the touch electrode is realized, the abrupt change of the resistances between the touch wiring and the touch electrode is avoided, the electrostatic breakdown at the joint of the touch wiring and the touch electrode is prevented, the electrostatic protection capability of the joint is further improved, and the reliability of the touch display panel is improved.

Description

Touch display panel and touch display device

Technical Field

The embodiment of the application relates to the technical field of display, in particular to a touch display panel and a touch display device.

Background

The existing display panel generally has a touch function, and a touch electrode and a touch wiring for transmitting signals to the touch electrode are required to be arranged in the display panel to realize the touch function. In the prior art, the line width of the touch control wiring at the joint of the touch control electrode is larger, so that the resistance of the touch control wiring of the connecting area is smaller, the difference between the resistance of the touch control wiring of the connecting area and the resistance of the touch control electrode is larger, abrupt change exists in the resistance, and the reliability of the touch control display panel is adversely affected.

Disclosure of Invention

In view of this, the present application provides a touch display panel and a touch display device, so as to reduce the abrupt change of resistance in the connection area between the touch electrode and the touch trace, and improve the reliability of the touch display panel.

In a first aspect, an embodiment of the present application provides a touch display panel, including a touch electrode and a touch trace;

the touch control wiring comprises a first connecting part and a wiring part, and the first connecting part is respectively and electrically connected with the touch control electrode and the wiring part;

the line width of the first connecting part is smaller than or equal to the line width of the wiring part.

In a second aspect, an embodiment of the present application provides a touch display device, including the touch display panel according to the first aspect of the present application.

In the embodiment of the application, the touch display panel comprises a touch electrode and a touch wiring; the touch control wiring comprises a first connecting part and a wiring part, and the first connecting part is respectively and electrically connected with the touch control electrode and the wiring part; the line width of the first connecting part is smaller than or equal to the line width of the wiring part. Through the scheme, the resistance of the first connecting part can be increased, the resistance difference between the first connecting part and the touch electrode is reduced, the gradual change of the resistances of the touch wiring and the touch electrode is realized, the abrupt change of the resistances between the touch wiring and the touch electrode is avoided, the electrostatic breakdown at the joint of the touch wiring and the touch electrode is prevented, the electrostatic protection capability of the joint is further improved, and the reliability of the touch display panel is improved.

Drawings

FIG. 1 is a schematic diagram of a touch display panel in the related art;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a touch display panel according to an embodiment of the present application;

FIG. 4 is an enlarged schematic view of FIG. 3 at B;

FIG. 5 is another enlarged schematic view of FIG. 3 at B;

fig. 6 is a schematic structural diagram of another touch display panel according to an embodiment of the present application;

FIG. 7 is an enlarged schematic view of FIG. 6 at F;

FIG. 8 is a schematic view of yet another enlarged construction of FIG. 3 at B;

FIG. 9 is an enlarged schematic view of FIG. 3 at C;

fig. 10 is an enlarged schematic view of the structure of fig. 9 at D;

FIG. 11 is another enlarged schematic view of FIG. 3 at C;

FIG. 12 is an enlarged schematic view of FIG. 11 at E;

fig. 13 is a schematic diagram of a partial enlarged structure of a touch display panel according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a touch display device according to an embodiment of the application.

Detailed Description

The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings.

Touch electrode and driving chip electricity are connected to the touch wire in the touch display panel, and the touch wire can set up in the frame district, and under the general circumstances, the wire that sets up in the frame district that is close to touch driving chip is more, and the wire arrangement is comparatively intensive, and the wire that sets up in the frame district that keeps away from touch driving chip is less, and the wire arrangement is comparatively sparse. Based on this, it is proposed in the related art to appropriately increase the width of the touch trace far from the touch driving chip, so as to reduce the loss in the process of transmitting the touch signal.

Fig. 1 is a schematic structural diagram of a touch display panel in the related art, and fig. 2 is an enlarged structural diagram of the portion a of fig. 1, as shown in fig. 1 and 2, in the related art, a line width of a portion of the touch trace 2' close to the touch driving chip 6' is smaller than a line width of a portion of the touch trace 2' far away from the touch driving chip 6', so as to reduce a resistance of the touch trace 2' far away from the touch driving chip 6', further reduce an impedance of the remote touch trace 2', and reduce a loss in a signal transmission process. The inventor researches find that although the loss can be reduced by the arrangement mode, the line width of the part of the touch wire 2 'far away from the touch driving chip is widened, so that the resistance of the part of the touch wire 2' is reduced, and further the resistance difference between the part of the touch wire 2 'and the touch electrode 1' electrically connected with the part of the touch wire is increased, so that the resistance between the part of the touch wire 2 'and the touch electrode 1' is suddenly changed, and the region (the region where the dotted line frame is located in fig. 2) is easily damaged by static electricity.

Based on the defects of the related art, the application provides a touch display panel, which comprises a touch electrode and a touch wiring; the touch control wiring comprises a first connecting part and a wiring part, and the first connecting part is respectively and electrically connected with the touch control electrode and the wiring part; the line width of the first connecting part is smaller than or equal to the line width of the wiring part.

Through the technical scheme, the resistance of the first connecting part can be increased, the resistance difference between the first connecting part and the touch electrode is reduced, the gradual change of the resistances of the touch wiring and the touch electrode is realized, the abrupt change of the resistances between the touch wiring and the touch electrode is avoided, the electrostatic breakdown at the joint of the touch wiring and the touch electrode is prevented, the electrostatic protection capability of the joint is further improved, and the reliability of the touch display panel is improved.

The foregoing is the core idea of the present application, and the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without making any inventive effort are intended to fall within the scope of the present application.

Fig. 3 is a schematic structural diagram of a touch display panel according to an embodiment of the present application, and fig. 4 is an enlarged structural diagram of a portion B of fig. 3, referring to fig. 3 and fig. 4, in which the touch display panel includes a touch electrode 1 and a touch trace 2; the touch-control wiring 2 comprises a first connecting part 21 and a wiring part 22, and the first connecting part 21 is respectively and electrically connected with the touch-control electrode 1 and the wiring part 22; the line width d1 of the first connection portion 21 is smaller than or equal to the line width d2 of the trace portion 22.

Specifically, as shown in fig. 3 and fig. 4, in order to realize the display function of the touch display panel, a touch electrode 1 and a touch trace 2 connected to the touch electrode 1 are disposed in the touch display panel, and the touch trace 2 transmits a touch signal to the touch electrode 1.

The touch display panel can be a self-contained touch display panel or a mutual-contained touch display panel. The self-capacitance type touch display panel is generally composed of a plurality of touch electrode blocks arranged in an array, each touch electrode block can form a self-capacitance with the ground, and an external capacitance formed by finger contact changes the self-capacitance formed between the touch electrode block and the ground, so that the specific position of a touch point can be detected. The mutual capacitance type touch display panel is generally composed of a sensing electrode and a driving electrode, a mutual capacitance is formed at the crossing position of the driving electrode and the touch sensing electrode, and an external capacitance formed by finger contact changes the mutual capacitance between the two electrodes, so that the specific position of a touch point can be detected.

For a self-contained touch display panel, the touch electrode 1 may be a touch electrode block; for a capacitive touch display panel, the touch electrodes may be driving electrodes and/or touch sensing electrodes. The touch display panel shown in fig. 3 is a mutual capacitive touch display panel, but is not limited thereto.

Further, the touch trace 2 is formed by a first connection portion 21 and a trace portion 22 that are connected to each other, and the first connection portion 21 is used for electrically connecting the touch electrode 1 and the trace portion 22. The touch wire 2 and the touch electrode 1 can be arranged in the same layer or different layers, when the touch wire 2 and the touch electrode 1 are arranged in the same layer, the touch wire 2 and the touch electrode 1 can be directly and electrically connected, and when the touch wire 2 and the touch electrode 1 are arranged in different layers, the touch wire 2 and the touch electrode 1 can be electrically connected through the through hole 3. Fig. 3 shows that the touch electrode 1 and the touch trace 2 are arranged in different layers and connected through the via hole 3, which is not limited thereto in practice.

With continued reference to fig. 4, it should be noted that in the present application, the line widths of different areas of the touch trace 2 may be differently set. Specifically, according to the calculation formula of the conductor resistance: r=ρl/S, and it is known that the resistance R of the conductor is inversely proportional to the cross-sectional area S of the conductor, and that the smaller the cross-sectional area is, the larger the resistance is. For the touch trace 2, the line width represents the cross-sectional area, and the smaller the line width of the touch trace 2, the larger the resistance of the touch trace 2 under the same length.

Based on this, the present application proposes to set the line width d1 of the first connection portion 21 smaller than or equal to the line width d2 of the trace portion 22, thereby increasing the resistance of the first connection portion 21, reducing the resistance difference between the first connection portion 21 and the touch electrode 1, and the resistance of the first connection portion 21 is used as the transition between the resistances of the trace portion 22 and the touch electrode 1, which is equivalent to the gradual change of the resistances of the trace portion 22, the first connection portion 21 and the touch electrode 1, avoiding the abrupt change of the resistance between the touch trace 2 and the touch electrode 1, preventing the electrostatic breakdown at the connection between the touch trace 2 and the touch electrode 1, further improving the electrostatic protection capability of the connection, and improving the reliability of the touch display panel.

The parameters such as the shapes of the touch electrode 1 and the touch trace 2 shown in fig. 3 and fig. 4 are examples, and the present application is not limited thereto, and those skilled in the art can set the structures of the touch electrode 1 and the touch trace 2 according to actual requirements, so as to ensure that the line width d1 of the first connection portion 21 of the touch trace 2 is smaller than the line width d2 of the trace portion 22.

In addition, in the embodiment of the present application, the line widths d2 of different areas of the trace portion 22 may be different, and the line width d1 of the first connection portion 21 is smaller than the line width d2 of any area of the trace portion 22.

Optionally, the touch display panel provided in the embodiment of the present application may further include any structure known to those skilled in the art, for example, a pixel unit for displaying, a pixel driving circuit for driving a pixel to display, and the like, but is not limited thereto. The above structure can be designed by those skilled in the art according to practical requirements, and the present application is not repeated and limited.

Alternatively, the touch display panel shown in fig. 3 is a regular touch display panel, and in other embodiments, the touch display panel may be a special-shaped touch display panel, and the solution in the present application is also applicable to a special-shaped touch display panel.

In the embodiment of the application, the touch display panel comprises a touch electrode and a touch wiring; the touch control wiring comprises a first connecting part and a wiring part, and the first connecting part is respectively and electrically connected with the touch control electrode and the wiring part; the line width of the first connecting part is smaller than or equal to the line width of the wiring part. Through the scheme, the resistance of the first connecting part can be increased, the resistance difference between the first connecting part and the touch electrode is reduced, the gradual change of the resistances of the touch wiring and the touch electrode is realized, the abrupt change of the resistances between the touch wiring and the touch electrode is avoided, the electrostatic breakdown at the joint of the touch wiring and the touch electrode is prevented, the electrostatic protection capability of the joint is further improved, and the reliability of the touch display panel is improved.

Optionally, in a possible embodiment, the square resistance of the touch electrode 1 is greater than the square resistance of the touch trace 2; or, the touch electrode 1 comprises a grid touch electrode, and the line width of the grid in the grid touch electrode is smaller than that of the touch wiring 2.

Specifically, the touch display panel provided by the embodiment of the application may be a self-capacitance type touch display panel, and at this time, the touch electrode 1 may be a touch electrode block, and when the touch electrode 1 is a touch electrode block, in order to ensure that the setting area of the touch electrode block is normally displayed, the touch electrode block may be a transparent touch electrode block, for example, the material of the touch electrode block may be ITO or other transparent materials. When the touch electrode block is a transparent touch electrode block, the square resistance of the touch electrode 1 is larger than the square resistance of the touch trace 2. Alternatively, the touch display panel provided by the embodiment of the application may be a mutual capacitive touch display panel, and in this case, in order to ensure normal display of the touch setting area, the touch electrode 1 may also be configured to include a grid touch electrode, for example, a metal grid touch electrode, and at this time, the sub-pixels may be disposed in meshes of the grid touch electrode, so as to avoid the grid touch electrode from shielding and displaying light. When the touch electrode 1 is a grid touch electrode, the grid line width of the grid touch electrode is smaller, for example, the grid line width of the grid touch electrode is smaller than the line width of the touch wiring 2, and the resistance of the grid touch electrode is larger. Therefore, the resistance of the touch electrode 1 is relatively large regardless of the touch electrode 1 of the touch electrode block type or the touch electrode 1 of the grid type. Therefore, in the embodiment of the application, if the line width of the first connection portion 21 is smaller than or equal to the line width of the trace portion 22, and if the resistance of the first connection portion 21 is not smaller than the resistance of the trace portion 22, a larger resistance is maintained at the position of the first connection portion 21 to match with the resistance of the touch electrode 1, so as to avoid a larger difference between the resistance of the first connection portion 21 and the resistance of the touch electrode 1, and electrostatic breakdown is caused at the connection position of the first connection portion 21 and the touch electrode 1.

Optionally, fig. 5 is another enlarged schematic structural diagram of fig. 3 at B, and referring to fig. 3 and fig. 5, the touch display panel may further include a touch binding terminal 4 and a touch binding area 5, where the touch binding terminal 4 is electrically connected to the touch driving chip 6 in a binding manner in the touch binding area 5; the trace portion 22 includes a first trace branch 220; in the same wire routing part 22, the number of first wire routing branches 220 in the wire routing part 22 at the side close to the touch binding area 5 is smaller than the number of first wire routing branches 220 in the wire routing part 22 at the side far from the touch binding area 5; in the same trace portion 22, two first trace branches 220 adjacently arranged along the first direction X are connected and have a gap; the first direction X intersects with the extending direction of the touch trace 2.

Specifically, as shown in fig. 3 and 5, a touch driving chip 6 may be further disposed in the display panel, where the touch driving chip 6 is configured to provide a touch driving signal for the touch electrode 1, receive a touch sensing signal, and determine a touch position and/or a touch pressure according to the touch driving signal and the touch sensing signal. The touch driving chip 6 may be disposed in a frame area NA on one side of the touch display panel, where the touch driving chip 6 is located in a lower frame area NA, which is not limited in practice.

A display driving chip (not shown) may be further disposed in the display panel, for providing display driving signals to the pixel units (not shown), and the display driving chip and the touch driving chip 6 may be disposed separately or integrally, which is not limited in the present application.

The touch binding terminal 4 and the touch binding region 5 may be disposed in a frame region NA on the same side as the touch driving chip 6, so that the touch binding terminal 4 is bound with the touch driving chip 6 in the touch binding region 5; the touch binding terminal 4 is also connected with the touch routing 2, so that signal transmission among the touch driving chip 6, the touch routing 2 and the touch electrode 1 is realized.

Further, in the present embodiment, the trace portion 22 may be formed by a plurality of first trace branches 220, the extending direction of each first trace branch 220 may be parallel to the extending direction of the touch trace 2, the plurality of first trace branches 220 are arranged along a first direction X intersecting with the extending direction of the first trace branch 220, two first trace branches 220 adjacent to each other along the first direction X may be connected at end points, such that a certain gap exists between the plurality of first trace branches 220 arranged along the first direction X, thereby realizing parallel connection of the plurality of first trace branches 220. Fig. 5 shows that the first direction X is perpendicular to the extending direction of the touch trace 2, which is not limited thereto.

In this arrangement, the first trace branches 220 arranged along the first direction X are connected in parallel, which is equivalent to reducing the resistance of the trace portion 22, and is beneficial to reducing the loss in the signal transmission process. In addition, the present embodiment further defines that, for the same routing portion 22, the number of first routing branches 220 in the area closer to the touch binding area 5 is smaller than the number of first routing branches 220 in the area farther from the touch binding area 5. In this way, along the direction that the side of the trace portion 22 near the touch driving chip 6 points to the side far away from the touch driving chip 6, the number of the first trace branches 220 gradually increases, so that the resistance of the trace portion 22 gradually decreases, and further the loss of the touch signal when transmitting to each touch electrode 1 is reduced.

The number of the first trace branches 220, the length of the first trace branches 220, and other parameters at different positions from the touch driving chip 6 in the same trace portion 22 are not limited, and one skilled in the art can set the parameters according to actual requirements, and in fig. 5, the first trace portion 22 includes one first trace branch 220 in the first area i; in the second area ii, the trace portion 22 includes two first trace branches 220; in the third area iii, the trace portion 22 includes three first trace branches 220, which is not limited thereto.

It should be noted that, when the trace portion 22 includes the first trace branches 220, the line width of the trace portion 22 may be regarded as the line width of a single first trace branch 220 or as the total line width of a plurality of first trace branches 220, which is not limited in the present application.

In this embodiment, the first parallel trace branches 220 are utilized to form the trace portion 22 of the touch trace 2, so that the resistance of the remote touch trace 2 is reduced, and meanwhile, the line width of the first connection portion 21 is still smaller than or equal to the line width of the first trace branches 220, and the resistance of the first connection portion 21 is not smaller than the resistance of the trace portion 22, that is, the first connection portion 21 maintains a larger resistance, so that the occurrence of abrupt resistance between the first connection portion 21 and the touch electrode is avoided, and the occurrence of electrostatic breakdown at the connection position of the first connection portion 21 and the touch electrode is avoided.

Fig. 6 is a schematic structural diagram of another touch display panel provided by the embodiment of the present application, fig. 7 is an enlarged structural diagram of fig. 6 at F, please refer to fig. 6 and fig. 7, in a possible embodiment, along an extending direction of the touch trace 2, the trace portion 22 and the first connection portion 21 are sequentially disposed; the first connection portion 21 and one of the first routing branches 220 of the routing portions 22 connected thereto have the same extending direction.

Specifically, as shown in fig. 7, in the present embodiment, the same touch trace 2 may include a first connection portion 21 and a trace portion 22 sequentially connected along the extending direction of the touch trace 2. The sequential connection means that in the same touch trace 2, projections of the first connection portion 21 and the trace portion 22 along the first direction X do not overlap; in other words, taking the drawing shown in fig. 7 as an example, in the same touch trace 2, the first connecting portion 21 is not provided with the first trace branches 220 along the left and right sides of the extending direction of the touch trace 2.

Since the first connection portion 21 and the first routing branch 220 connected with the first connection portion extend in the same direction, the first routing branch 220 in the same touch routing 2 cannot extend to the area where the first connection portion 21 in the touch routing 2 is located, so that the influence of the first routing branch 220 on the resistance of the first connection portion 21 is avoided, and a small resistance difference between the first connection portion 21 and the touch electrode 1 is ensured.

In the embodiment shown in fig. 6 and fig. 7, at least part of the first connection portion 21 and the trace portion 22 may be disposed in the display area of the touch display panel, so as to reduce the occupied area of the touch trace 2 in the frame area NA, and realize a narrow frame.

Optionally, fig. 8 is a schematic diagram of still another enlarged structure of fig. 3 at B, referring to fig. 3 and 8, the trace portion 22 further includes at least one first trace branch 220 located on one side of the first connection portion 21 in the first direction X; the first trace branch 220 is electrically connected to the first connection portion 21 and has a gap with the first connection portion 21.

In the embodiment shown in fig. 8, at least part of the first connection portion 21 and the trace portion 22 may be disposed in a frame area NA of the touch display panel, where the first connection portion 21 is connected to the touch electrode 1. In the same touch trace 2, at least one first trace branch 220 is located at a side of the first connection portion 21 away from the touch electrode 1 and is electrically connected to the first connection portion 21.

With continued reference to fig. 8, further alternatively, the end point of the first connection portion 21 may be connected to the first trace branch 220, and both may extend in the same direction, such that a gap exists between the first connection portion 21 and the first trace branch 220 connected thereto along the extending direction of the touch trace 2.

In this way, in the same touch trace 2, the first connection portion 21 and the first trace branch 220 connected thereto are in parallel connection, that is, the partial region of the trace portion 22 is connected in parallel with the first connection portion 21. And the resistance of at least part of the area in the touch wire 2 can be reduced, so that the loss in signal transmission is reduced. In addition, the resistance of the first connection portion 21 is not affected after the first connection portion 21 and the first routing branch 220 are connected in parallel, and the resistance difference between the first connection portion 21 and the touch electrode 1 is still small.

Optionally, in the embodiment of the present application, the line width of the first routing branches 220 in the area with different distances from the touch binding area 5 and the size of the gap between two adjacent first routing branches 220 in the area with the same distance from the touch binding area 5 may be further defined.

For example, as shown in fig. 3 and 8, in the same wire section 22, a first wire branch 220 of the wire section 22 near the touch binding area 5 has a first wire width a1, and a first gap b1 is provided between two first wire branches 220 adjacently arranged along the first direction X; the first wire branch 220 in the wire part 22 far away from one side of the touch binding area 5 is provided with a second wire width a2, and a second gap b2 is arranged between two first wire branches 220 adjacently arranged along the first direction X; wherein the first line width a1 and the second line width a2 meet 0.ltoreq.a1-a2|/a1.ltoreq.50%; the first gap b1 and the second gap b2 satisfy 0.ltoreq.b1-b2|/a1.ltoreq.50%.

Specifically, as shown in fig. 3 and 8, in the present embodiment, along the extending direction of the touch trace 2, the frame area NA (the right frame area NA is shown in the drawing, but is not limited to this in practice) where the first connection portion 21 and the trace portion 22 are located may be divided into a proximal area NA1 and a distal area NA2, where the proximal area NA1 is close to the touch binding area 5, and the distal area NA2 is far away from the touch binding area 5. In the proximal area NA1, the line width of the first trace branch 220 is a first line width a1, and the gap between two adjacent first trace branches 220 along the first direction X is a first gap b1; in the distal end area NA2, the line width of the first trace branch 220 is the second line width a2, and the gap between two adjacent first trace branches 220 along the first direction X is the second gap b2.

Further, it is understood that the first line width a1 and the second line width a2 are positive values, and the ratio of the absolute value of the difference between the first line width a1 and the second line width a2 to the first line width a1 should be not less than 0. Meanwhile, it may be defined that the ratio of the absolute value of the difference between the first line width a1 and the second line width a2 to the first line width a1 is less than or equal to 0.5, that is, the gap difference between the first line width a1 and the second line width a2 is controlled to be less than or equal to half the value of the first line width a1, so that the values of the first line width a1 and the second line width a2 are less different, so that the line widths of the first trace branches 220 of the proximal end area NA1 and the distal end area NA2 are close to or even equal. When the line widths of the first routing branches 220 are close to or the same as each other, the reflection and/or refraction effects of the light on the first routing branches 220 are close to or the same as each other, so that the optical performance of the touch display panel is improved, and the visual effect of the touch display panel is improved.

Similarly, if the first gap b1 and the second gap b2 are both positive values, the ratio of the absolute value of the difference between the first gap b1 and the second gap b2 to the first gap b1 should be not less than 0. Meanwhile, it may be defined that the ratio of the absolute value of the difference between the first gap b1 and the second gap b2 to the first gap b1 is less than or equal to 0.5, that is, the gap difference between the first gap b1 and the second gap b2 is controlled to be less than or equal to half of the value of the first gap b1, so that the value difference between the first gap b1 and the second gap b2 is smaller, so that the gaps between two adjacent first routing branches 220 in the near end area NA1 and the far end area NA2 are close to or even the same, and further, the reflection and/or refraction effects of light in the near end area NA1 and the far end area NA2 are more uniform, which plays a role in improving the optical performance of the touch display panel.

In an alternative embodiment, the first line width a1 and the second line width a2 may be set to be the same, and the first gap b1 and the second gap b2 are the same, so that the light has the same reflection and/or refraction effect on the trace portion 22 in the area with different distances from the touch binding area 5, and the optical performance of the touch display panel is further improved.

It should be noted that, fig. 8 exemplarily illustrates that the number of the trace portions 22 closer to the touch binding area 5 and the number of the first trace branches 220 in the trace portion 22 farther from the touch binding area 5 are different by one number gradient, for example, in the same touch trace 2, the trace portion 22 located in the proximal end area NA1 is formed by two first trace branches 220, and the trace portion 22 located in the distal end area NA2 is formed by three first trace branches 220, which is not limited thereto in practice. When the number of the first trace branches 220 in the trace portion 22 closer to the touch binding area 5 and the number of the first trace branches 220 in the trace portion 22 farther from the touch binding area 5 have a plurality of gradually changing number gradients, as shown in fig. 5, for example, in the first area i, the trace portion 22 is formed by one first trace branch 220, in the second area ii, the trace portion 22 is formed by two first trace branches 220, and in the third area iii, the trace portion 22 is formed by three first trace branches 220, in which case, a side of the touch trace 2 close to the touch binding area 5 points in a direction away from the touch binding area 5, and in any two areas, the line width of the first trace branch 220 close to the touch binding area 5 and the line width of the first trace branch 220 away from the touch binding area 5 satisfy the relationship between the first line width a1 and the second line width a2, and the gap between two adjacent first trace branches 220 along the first direction X satisfies the relationship between the first gap 1 and the second gap 2.

Optionally, fig. 9 is an enlarged schematic structural diagram of fig. 3 at C, fig. 10 is an enlarged schematic structural diagram of fig. 9 at D, and with continued reference to fig. 9 and fig. 10, a touch binding terminal 4 and a touch binding area 5 are disposed in the touch display panel, and the touch binding terminal 4 is electrically connected with the touch driving chip 6 in a binding manner in the touch binding area 5; the touch-control wiring 2 further comprises a second connecting part 23, and the second connecting part 23 is respectively connected with the touch-control binding terminal 4 and the wiring part 22; the arrangement direction of the plurality of wiring parts 22 connected to the plurality of second connection parts 23 intersects with the arrangement direction of the plurality of second connection parts 23; the second connection portion 23 includes a plurality of connection branches 230 connected.

The touch binding terminal 4, the touch binding area 5, and the touch driving chip 6 are configured in the same manner as in the above embodiment, and will not be described herein. Referring to fig. 5 and 9, in the present embodiment, the second connection portion 23 of the touch trace 2 is used for connecting the touch binding terminal 4 and the trace portion 22. The arrangement direction of the plurality of second connection portions 23 may be the same as the arrangement direction of the plurality of touch binding terminals 4, and may intersect with the arrangement direction of the plurality of trace portions 22 connected thereto.

It should be noted that, in the above embodiment, the trace portion 22 is located at the left and/or right frame area NA of the touch display panel, and the extending direction of the trace portion 22 is the same as the overall extending direction of the touch trace 2 (intersecting the first direction X) so as to connect the touch electrode 1 through the first connection portion 21. In this embodiment, in addition to the trace portion 22 having the same extending direction as the touch trace 2, the touch trace 2 further includes a trace portion 22 located in the same frame area NA (e.g. lower frame area NA) as the touch binding area 5, and the portion of the trace portion 22 is used for connecting the second connection portion 23 and the trace portion 22 located in the left and/or right frame area NA. The trace portion 22 having the same extending direction as the touch trace 2 is defined as a first sub-trace portion 221, and the trace portion 22 for connecting the second connection portion 23 and the first sub-trace portion 221 is defined as a second sub-trace portion 222. The extending direction of the second sub-trace portions 222 may be the same as the arrangement direction of the second connection portions 23, and the arrangement direction of the plurality of second sub-trace portions 222 may intersect with the arrangement direction of the second connection portions 23.

Taking the touch driving chip 6 shown in fig. 9 as an example, the touch binding terminals 4 are arranged in the lower frame area NA along the first direction X, and a plurality of second connection portions 23 may be provided to connect the touch binding terminals 4, and also arranged along the first direction X, where one end of each second connection portion 23 is connected to the touch binding terminal 4 and the other end is connected to the second sub-wiring portion 222.

Further, with continued reference to fig. 9 and 10, in order to implement a narrow bezel, the width of the bezel area NA of the touch display panel is generally set narrower. For the lower frame area NA, the width of the lower frame area NA is the width thereof along the vertical first direction X (the arrangement direction of the second sub-wiring portions 222 connected to the second connection portions 23), resulting in a smaller wiring area width of the second sub-wiring portions 222, and the line width of each second sub-wiring portion 222 needs to be set smaller. The size of the touch binding terminal 4 is generally larger, and in order to ensure the binding effect between the second connection portion 23 and the touch binding terminal 4, the line width of the second connection portion 23 is generally set to be larger.

Based on this, it is proposed in the present embodiment that the second connection portion 23 may be constituted by a plurality of connection branches 230 connected to each other with gaps between the plurality of connection branches 230 and connected in parallel at end points. In this arrangement, the second sub-trace portion 222 may be connected to the touch binding terminal 4 sequentially through each connection branch 230, where the line width of the connection branch 230 may be smaller to match with the line width of the second sub-trace portion 212, so that the resistance difference between the touch trace 2 at the connection between the second sub-trace portion 221 and the second connection portion 23 is smaller, and electrostatic breakdown caused by abrupt resistance is avoided.

The line width a3 of the connection branch 230 may be similar to or the same as the line width a4 of the second sub-wiring portion 221, and the gap b3 between two adjacent connection branches 230 may be similar to or the same as the gap b4 between two adjacent second sub-wiring portions 222, so that the light reflection and/or refraction conditions of the connection area are uniform, the optical performance of the touch display panel is improved, and the visual effect is improved.

Alternatively, with continued reference to fig. 9 and 10, as an alternative embodiment, the extending direction of the connection branch 230 may be set to be the same as the extending direction of the trace portion 22 connected to the second connection portion 23.

Specifically, in the present embodiment, the extending direction of the connection branch 230 may be the same as the extending direction of the second sub-trace portion 222, i.e. both may extend along the first direction X. Meanwhile, the arrangement direction of each connection branch 230 may be set to be the same as the arrangement direction of each second sub-trace portion 222. In this way, the extending direction of the gap between the adjacent connection branches 230 is the same as the extending direction of the gap between the adjacent second sub-trace portions 222, and the mask pattern is simpler when the connection branches 230 and the second sub-trace portions 222 are formed by etching the touch trace layer disposed on the whole layer. In addition, the extending directions of the connection branch 230 and the second sub-trace portion 222 are the same, so that the reflective uniformity of the area can be further improved, and the optical effect can be further improved.

Alternatively, fig. 11 is another enlarged schematic structural view of fig. 3 at C, fig. 12 is an enlarged schematic structural view of fig. 11 at E, and referring to fig. 11 and 12, the touch binding terminal 4 may include a binding portion 41 and a hollowed portion 42, where the hollowed portion 42 penetrates the touch binding terminal 4; the binding portion 41 includes a long-side binding portion 410 and a short-side binding portion 411, the long-side binding portion 410 having an extension length longer than that of the short-side binding portion 411; the extension direction of the connection branch 230 is the same as the extension direction of the long-side binding portion 410.

Specifically, as shown in fig. 11 and 12, in this embodiment, the middle of the touch binding terminal 4 may be hollowed out, so as to reduce reflection and/or refraction of light by the touch binding terminal 4, and improve the visual effect of the binding area. Wherein. The touch binding terminal 4 reserves an edge area as a binding portion 41, and the binding portion 41 is used for binding with the second connecting portion 23 later.

Taking the projection of the touch binding terminal 4 along the light emitting direction as an example, the binding portion 41 with a longer extension length may be defined as a long-side binding portion 410, and the binding portion 41 with a shorter extension length may be defined as a short-side binding portion 411. The extending direction of the long-side binding portion 410 may be the same as the direction in which the touch binding terminal 4 points to the second connection portion 23.

It can be understood that the touch driving chip 6 is generally disposed on a side of the touch binding terminal 4 away from the second connection portion 23, and when the touch signal is transmitted, the touch signal is mainly transmitted to the second connection portion 23 through the long-side binding portion 410 of the touch binding terminal 4. Based on this, the present embodiment may provide that the extending direction of the connection branch 230 is the same as the extending direction of the long-side binding portion 410. In this way, the flow directions of the charges on the touch binding terminal 4 and the connection branch 230 are the same, which is beneficial to reducing the impedance during signal transmission and further reducing the loss.

Fig. 12 exemplarily illustrates that the long-side binding part 410 and the connection branch 230 extend in a direction perpendicular to the first direction X, but is not limited thereto. In this arrangement, the extending direction of the connection branch 230 is perpendicular to the extending direction of the second sub-trace portion 222 connected thereto.

Optionally, fig. 13 is a schematic view of a partial enlarged structure of a touch display panel according to an embodiment of the present application, and referring to fig. 13, the touch display panel may further include a virtual touch trace 7 and/or a ground signal trace 8; the existing part of virtual touch control wires 7 comprises second wire branches 70, and in the same virtual touch control wires 7, two second wire branches 70 which are adjacently arranged along the first direction X are connected and have gaps; and/or, the partial ground signal trace 8 includes a third trace branch 80, and in the same ground signal trace 8, two third trace branches 80 adjacently disposed along the first direction X are connected and have a gap.

The virtual touch trace 7 may not be connected to a signal, and the ground signal trace 8 may be used for grounding to perform grounding protection on the touch display panel. The virtual touch trace 7 and/or the ground signal trace 8 may be disposed in the same side of the frame area NA as the touch trace 2.

Further, as shown in fig. 13, when the virtual touch trace 7 is disposed in the touch display panel, at least a portion of the virtual touch trace 7 may be configured by a plurality of second trace branches 70, an extending direction of each second trace branch 70 may be parallel to an extending direction of the virtual touch trace 7, the plurality of second trace branches 70 are arranged along a first direction X intersecting with the extending direction of the second trace branch 70, and two second trace branches 70 adjacent along the first direction X may be connected at end points, so that a certain gap exists between the plurality of second trace branches 70 arranged along the first direction X, thereby implementing parallel connection of the plurality of second trace branches 70.

When the ground signal trace 8 is disposed in the touch display panel, at least a portion of the ground signal trace 8 may be configured by a plurality of third trace branches 80, an extension direction of each third trace branch 80 may be parallel to an extension direction of the ground signal trace 8, the plurality of third trace branches 80 may be arranged along a first direction X intersecting with the extension direction of the third trace branches 80, and two third trace branches 80 adjacent along the first direction X may be connected at end points, so that a certain gap exists between the plurality of third trace branches 80 arranged along the first direction X, thereby implementing parallel connection of the plurality of third trace branches 80.

At least part of the virtual touch wires 7 and/or at least part of the grounding signal wires 8 are arranged in a plurality of wire branches, and the purpose of the virtual touch wires is to match with each first wire branch 220 of the touch wires 2, so that the effect of the wires in the frame area NA on light reflection and/or refraction is uniform, and the optical performance of the touch display panel is further improved.

Along the extending direction of the touch trace 2, the projection of the second trace branch 70 and/or the third trace branch 80 may at least partially overlap with the projection of the first trace branch 220, that is, the second trace branch 70 and/or the third trace branch 80 may be arranged in the projection coverage area of the first trace branch 220 along the extending direction thereof, so that the arrangement of all trace branches is relatively uniform in the frame area NA, and further, a uniformity of reflection and/or refraction effects when light irradiates the area is further improved.

In the embodiment shown in fig. 13, the touch display panel includes both the virtual touch trace 7 and the ground signal trace 8, and the two traces respectively include the trace branches connected to each other. In other embodiments, not shown, only the virtual touch trace 7 or the ground signal trace 8 may be provided, and one of the traces may be provided in the form of the trace branch, which will not be described in detail in the present application.

The virtual touch trace 7 and/or the ground signal trace 8 may be disposed on the same layer or different layers from the touch trace 2, which is not repeated and limited in the embodiment of the present application.

Based on the same inventive concept, the embodiment of the application also provides a touch display device. Fig. 14 is a schematic structural diagram of a touch display device according to an embodiment of the application. As shown in fig. 14, the touch display device includes the touch display panel 100 provided by any embodiment of the present application, so the touch display device provided by the embodiment of the present application has the corresponding beneficial effects of the touch display panel provided by the embodiment of the present application, and will not be described herein. The touch display device may be, for example, an electronic device such as a mobile phone, a computer, a smart wearable device (e.g., a smart watch), and a vehicle-mounted display device, which is not limited in the embodiment of the present application.

Note that the above is only a preferred embodiment of the present application and the technical principle applied. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the application. Therefore, while the application has been described in connection with the above embodiments, the application is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the application, which is set forth in the following claims.

Claims (11)

1. The touch display panel is characterized by comprising a touch electrode and a touch wiring;

the touch control wiring comprises a first connecting part and a wiring part, and the first connecting part is respectively and electrically connected with the touch control electrode and the wiring part;

the line width of the first connecting part is smaller than or equal to the line width of the wiring part.

2. The touch display panel of claim 1, further comprising a touch binding terminal and a touch binding region, wherein the touch binding terminal is electrically connected with the touch driving chip in the touch binding region;

the wiring part comprises a first wiring branch;

in the same wiring part, the number of the first wiring branches in the wiring part close to one side of the touch binding area is smaller than that of the first wiring branches in the wiring part far away from one side of the touch binding area;

in the same wiring part, two first wiring branches adjacently arranged along a first direction are connected and have a gap; the first direction intersects with the extending direction of the touch trace.

3. The touch display panel according to claim 2, wherein the wiring portion and the first connection portion are sequentially disposed along an extending direction of the touch wiring;

the extending direction of the first connecting part and one of the first wire branches in the wire parts connected with the first connecting part is the same.

4. The touch display panel according to claim 2, wherein the trace portion further includes at least one first trace branch located at a side of the first connection portion in the first direction; the first wiring branch is electrically connected with the first connecting part, and a gap exists between the first wiring branch and the first connecting part.

5. The touch display panel according to claim 2, wherein in the same wiring portion, the first wiring branch in the wiring portion adjacent to the touch binding area has a first line width, and a first gap is provided between two first wiring branches adjacently arranged along a first direction; the first wire-moving branches in the wire-moving part far away from one side of the touch binding area are provided with a second wire width, and a second gap is arranged between two first wire-moving branches which are adjacently arranged along a first direction;

wherein the first line width a1 and the second line width a2 satisfy 0.ltoreq.a1-a2|/a1.ltoreq.50%;

the first gap b1 and the second gap b2 are more than or equal to 0% and less than or equal to 50% of the total sum of the absolute values b1 and b 2/a 1.

6. The touch display panel of claim 1, further comprising a touch binding terminal and a touch binding region, wherein the touch binding terminal is electrically connected with the touch driving chip in the touch binding region;

the touch control wiring also comprises a second connecting part which is respectively connected with the touch control binding terminal and the wiring part;

the arrangement direction of the plurality of wire walking parts connected with the plurality of second connecting parts is intersected with the arrangement direction of the plurality of second connecting parts;

the second connection portion includes a plurality of connection branches connected.

7. The touch display panel according to claim 6, wherein an extending direction of the connection branch is the same as an extending direction of the trace portion connected to the second connection portion.

8. The touch display panel of claim 6, wherein the touch binding terminal comprises a binding portion and a hollowed portion, the hollowed portion penetrating the touch binding terminal;

the binding part comprises a long-side binding part and a short-side binding part, and the extension length of the long-side binding part is larger than that of the short-side binding part;

the extending direction of the connecting branch is the same as the extending direction of the long-side binding part.

9. The touch display panel of claim 2, further comprising virtual touch traces and/or ground signal traces;

the virtual touch control wire comprises a first wire branch, a second wire branch and a first wire branch, wherein the first wire branch is connected with the second wire branch, and a gap exists between the first wire branch and the second wire branch;

and/or, a part of the grounding signal wires comprise third wire branches, and in the same grounding signal wires, two third wire branches adjacently arranged along the first direction are connected and have gaps.

10. The touch display panel of claim 1, wherein a square resistance of the touch electrode is greater than a square resistance of the touch trace;

or, the touch electrode comprises a grid touch electrode, and the line width of the grid in the grid touch electrode is smaller than the line width of the touch wiring.

11. A touch display device comprising the touch display panel of any one of claims 1-10.