1. The touch display panel comprises a functional area and a frame area surrounding the functional area, wherein the frame area comprises at least one lap joint area, and the touch display panel further comprises:

the touch substrate comprises a plurality of first terminals positioned in the lap joint area;

the display substrate is oppositely arranged with the touch substrate and comprises a plurality of second terminals located in the lap joint area, the first terminals and the second terminals are in one-to-one lap joint, and the second terminals are linearly arranged.

2. The touch display panel of claim 1, wherein the frame region further comprises a frame sealing region surrounding the functional region, and the overlapping region is located between the frame sealing region and the functional region, the touch display panel further comprising:

the frame sealing glue is positioned in the frame sealing area, surrounds the functional area and is used for bonding the touch substrate and the display substrate;

wherein, in a direction perpendicular to the surface of the touch substrate, the thickness of the frame sealing glue is less than the sum of the thicknesses of the two first terminals and the second terminal which are overlapped with each other, an

An extended trace of the gap between the bezel region and the functional region surrounds the functional region, and in each of the lap regions, the second terminals are arranged along the extended trace.

3. The touch display panel of claim 2, wherein a distance from the landing zone to the bezel zone is less than a distance from the landing zone to the functional zone.

4. Touch display panel according to claim 2, characterized in that in each of the landing zones,

the distances from the second terminals to the frame sealing area are the same; and/or

The distances from the second terminals to the functional regions are the same.

5. Touch display panel according to one of claims 1 to 4, characterized in that in each of the landing zones,

the second terminals are arranged in a straight line; or

The second terminals are arranged in a fold line, and the fold line comprises a first straight line section and a second straight line section which are connected with each other; or

The second terminals are arranged in a broken line mode, the broken line mode comprises a first straight line section, a curve section and a second straight line section which are sequentially connected end to end, preferably, the touch display panel is provided with an R angle, and the curve section corresponds to the R angle and is conformal with the R angle.

6. The touch display panel of any one of claims 1-4, wherein the bezel region further comprises a bonding region on the display substrate, the touch substrate is outside the bonding region, the at least one landing region comprises a first landing region and a second landing region, and the bezel region further comprises a first routing region extending from the functional region to the bonding region.

7. Touch display panel according to claim 6, wherein the first and second pads are located on two sides of the first wiring area, preferably, the second terminals in the first pad and the second terminals in the second pad are distributed in axial symmetry, and the extension direction of the symmetry axis is parallel to the direction from the functional area to the bonding area.

8. The touch display panel of claim 6, wherein the frame region further includes a second wiring region extending from the lap region to the bonding region, and the display substrate further comprises:

a control chip;

one end of the flexible circuit board is used for bearing the control chip, and the other end of the flexible circuit board is bound in the binding area; and

and the first type of wires are positioned in the second wiring area, one end of each first type of wire is connected with the second terminal, and the other end of each first type of wire extends to the bonding area to be connected with the flexible circuit board.

9. The touch display panel of claim 8,

the touch substrate comprises a touch electrode layer positioned in the touch function area, the touch electrode layer comprises a plurality of driving electrodes and a plurality of induction electrodes, the driving electrodes and the induction electrodes are crossed with each other, the touch substrate further comprises driving signal lines and induction signal lines, one ends of the driving signal lines are connected to the driving electrodes, the other ends of the driving signal lines are connected to the first terminals, one ends of the induction signal lines are connected to the induction electrodes, the other ends of the induction signal lines are connected to the first terminals, and preferably, at least one of the driving electrodes and the induction electrodes is formed on the same layer as and made of the same material as the first terminals; and

the display substrate is located the part of functional area is the display area, the display substrate includes array substrate and is located display function layer and the second type on the array substrate are walked the line, display function layer is located in the display area, the second type is walked the line and is located in the first wiring district, just the one end of the second type is walked the line extends to the display area, the other end extend to the bonding district with flexible circuit board connects.

10. The touch display panel of claim 9,

the display function layer comprises a plurality of light emitting devices positioned on the array substrate, the light emitting devices comprise an anode layer, a light emitting function layer and a cathode layer which are sequentially superposed on the array substrate, and

the second terminal and the cathode layer are formed on the same layer and material; and/or

At least part of the second type of routing wire and the anode layer are formed in the same layer and material.

Background

With the wide application of electronic products with touch display functions, users have increasingly high demands for reliability and the like of the electronic products. The panel of the electronic product with the touch display function comprises a touch substrate and a display substrate, wherein signal lines of the touch substrate need to be connected to the display substrate so as to collect and integrate all the signal lines of the touch substrate and the display substrate.

The current panel is limited to the structure of the panel, and when the touch substrate and the display substrate are combined, poor contact is easily generated at the joint of the signal lines, so that the reliability of the panel is low.

Disclosure of Invention

The utility model provides a touch-control display panel, at the overlap joint of display substrate and touch-control base plate, set up the terminal (the following first terminal and second terminal) that is used for the overlap joint to be linear and arrange, alleviate or eliminate because of the problem such as the contact failure appears in the overlapping partial terminal that the atress is uneven when closing display substrate and touch-control base plate to improve touch-control display panel's yield and reliability in the use.

A first aspect of the present disclosure provides a touch display panel, which includes a functional area and a frame area surrounding the functional area, wherein the frame area includes at least one overlapping area. The touch display panel further comprises a touch substrate and a display substrate. The touch substrate comprises a plurality of first terminals located in the lap joint area. The display substrate and the touch substrate are oppositely arranged and comprise a plurality of second terminals located in the overlapping area, the first terminals and the second terminals are in one-to-one corresponding overlapping, and the second terminals are linearly arranged.

In the above scheme, since the second terminals are linearly arranged, each second terminal (or the overlapping structure formed by the first terminal and the second terminal) does not have other adjacent second terminals (or the overlapping structure) in any direction intersecting with the arrangement track of the second terminals, so that the risk of warping of the touch substrate or the display panel caused by the overlapping structure to other overlapping structures is reduced.

In the above disclosure, even if the lapping structure causes the touch substrate or the display panel to warp, other adjacent lapping structures are not in the extending direction of the warping deformation, so that the condition of poor lapping caused by warping does not exist.

In a touch display panel provided in a specific implementation manner of the first aspect of the present disclosure, the frame region further includes a frame sealing region surrounding the function region, the lap region is located between the frame sealing region and the function region, and the touch display panel further includes frame sealing glue. The frame sealing glue is located in the frame sealing area and surrounds the functional area and is used for bonding the touch substrate and the display substrate. In the direction perpendicular to the surface of the touch substrate, the thickness of the frame sealing glue is smaller than the sum of the thicknesses of the two first terminals and the second terminals which are overlapped with each other. An extended trace of the gap between the bezel region and the functional region surrounds the functional region, and in each of the lap regions, the second terminals are arranged along the extended trace. For example, in each of the lap joint regions, the second terminals are arranged linearly along the peripheral edge of the functional region; alternatively, the normal lines of the respective positions of the arrangement tracks of the second terminals extend from the frame sealing region to the functional region, and for example, further, the normal lines of any position of the arrangement tracks of the second terminals are parallel to each other at the tangent lines of the intersection points at the inner edge of the frame sealing region, the arrangement tracks, and the outer edge of the functional region.

When the touch substrate and the display substrate are combined, the pressure distribution applied by the frame region generally surrounds the functional region. In the above scheme, even if the touch substrate or the display panel is warped due to the overlapping structure, the warping deformation does not extend along the direction surrounding the functional area. For example, even if the touch substrate or the display panel is warped due to the overlapping structure, other adjacent overlapping structures are not in the extending direction of the warping deformation, so that the poor overlapping due to the warping does not exist.

In one embodiment of the first aspect of the present disclosure, a distance from the lap area to the frame sealing area is smaller than a distance from the lap area to the functional area.

In the above scheme, the lap joint structure can be closer to the frame sealing area, and when the touch substrate and the display substrate are pressed, adverse effects on elements in the functional area caused by warping can be relieved.

In the touch display panel provided in one embodiment of the first aspect of the present disclosure, in each of the overlapping regions, the distance from the second terminal to the frame sealing region is the same; and/or the distance from the second terminal to the functional area is the same in each of the lap joint areas.

In the above scheme, when pressfitting touch-control base plate and display substrate, can be so that the pressure that each overlap joint structure received is roughly the same, avoid the pressure that partial overlap joint structure that the pressure distribution inequality leads to received too big and damaged or partial overlap joint structure received pressure undersize and lead to the overlap joint bad scheduling problem.

In the touch display panel provided in one embodiment of the first aspect of the present disclosure, in each of the overlapping regions, the second terminals are arranged in a straight line; or in each overlapping area, the second terminals are arranged in a folding line, and the folding line comprises a first straight line section and a second straight line section which are connected with each other; or, in each overlapping area, the second terminals are arranged in a broken line, and the broken line includes a first straight line segment, a curved line segment and a second straight line segment which are sequentially connected end to end.

In the above scheme, under the condition that the second terminal is the broken line and arranges, the overlap joint area can set up the corner region at the touch-control base plate to the shape of arranging of second terminal can match with the shape of the corner region of touch-control base plate, is favorable to improving the space utilization in touch-control display panel's frame district.

In a touch display panel provided in a specific implementation manner of the first aspect of the present disclosure, the frame region further includes a bonding region located on the display substrate, the touch substrate is located outside the bonding region, the at least one bonding region includes a first bonding region and a second bonding region, and the frame region further includes a first wiring region extending from the functional region to the bonding region.

In the above scheme, set up two overlap joint district, can disperse the density of arranging of overlap joint structure, avoid overlap joint structure gathering in a region and lead to this region to need great design width to be favorable to the frame district to carry out extremely narrowing design.

In a touch display panel provided in a specific embodiment of the first aspect of the present disclosure, the first and second strap regions are located on two sides of the first wiring region. For example, further, the second terminals in the first bonding region and the second terminals in the second bonding region are distributed in axial symmetry, and the extending direction of the symmetry axis is parallel to the direction from the functional region to the bonding region.

In the above scheme, when the touch substrate and the display substrate are combined, the pressure applied to the two lap joint regions is the same, which is beneficial to improving the thickness uniformity of the touch display panel.

In a touch display panel provided in a specific implementation manner of the first aspect of the present disclosure, the frame region further includes a second wiring region extending from the lap region to the bonding region. The display substrate further comprises a control chip, a flexible circuit board and a plurality of first-type wires. One end of the flexible circuit board is used for bearing the control chip, and the other end of the flexible circuit board is bonded in the bonding area. The first type of wires are located in the second wiring area, one end of each first type of wire is connected with the second terminal, and the other end of each first type of wire extends to the bonding area to be connected with the flexible circuit board.

In the above scheme, the control chip is connected with the first terminal of the touch substrate through the flexible circuit board, the first type of trace and the second terminal, and can control the touch function of the touch substrate.

In a touch display panel provided in a specific embodiment of the first aspect of the present disclosure, a portion of the touch substrate located in the functional region is a touch functional region, the touch substrate includes a touch electrode layer located in the touch functional region, the touch electrode layer includes a plurality of driving electrodes and a plurality of sensing electrodes, the driving electrodes and the sensing electrodes intersect with each other, the touch substrate further includes driving signal lines and sensing signal lines, one end of the driving signal lines is connected to the driving electrodes, the other end of the driving signal lines is connected to the first terminals, one end of the sensing signal lines is connected to the sensing electrodes, and the other end of the sensing signal lines is connected to the first terminals. The display substrate comprises an array substrate, a display function layer and a second wiring, wherein the display function layer and the second wiring are arranged on the array substrate, the display function layer is arranged in the display area, the second wiring is arranged in the first wiring area, one end of the second wiring extends to the display area, and the other end of the second wiring extends to the bonding area to be connected with the flexible circuit board. For example, further, at least one of the driving electrode and the sensing electrode is formed in the same layer and material as the first terminal.

In a touch display panel provided in a specific embodiment of the first aspect of the present disclosure, the display function layer includes a plurality of light emitting devices on the array substrate, and the light emitting devices include an anode layer, a light emitting function layer, and a cathode layer sequentially stacked on the array substrate. The second terminal and the cathode layer are formed in the same layer and the same material, and/or at least part of the second type of routing and the anode layer are formed in the same layer and the same material.

In the above scheme, the second terminal and at least part of the second type of wires are arranged without increasing the manufacturing process flow of the display substrate, so that the design of the display substrate is simplified, and the cost control is facilitated.

Drawings

Fig. 1 is a schematic plan view illustrating a touch display panel according to an embodiment of the present disclosure.

Fig. 2 is a cross-sectional view of the touch display panel shown in fig. 1 along the X-axis direction and passing through the overlapping area.

FIG. 3 is a cross-sectional view of the touch display panel shown in FIG. 1 along the Y-axis direction and passing through the bonding area.

Fig. 4 is a cross-sectional view of a partial structure of a touch display panel.

Fig. 5 is a schematic plan view illustrating a partial area of another touch display panel according to an embodiment of the disclosure.

Fig. 6 is a schematic plan view illustrating a partial area of another touch display panel according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The touch display panel comprises a display substrate and a touch substrate which are combined, and signal lines on the touch substrate need to be connected to the display substrate in an overlapping mode through terminals so as to integrate the signal lines of the whole touch display panel. In consideration of the arrangement of the signal lines on the display substrate, the area of the touch substrate for the overlapped terminals needs to be kept away from the signal lines on the display substrate, so that the area where the terminals can be laid out is limited. Thus, the terminals are arranged in an array in the lapping region.

When the display substrate and the touch substrate are combined, the lapping structure formed by the terminals in the lapping region can support the display substrate and the touch substrate, so that the display substrate and/or the touch substrate are warped due to uneven stress, and thus, the terminals at part of the lapping structure are not firmly contacted or cannot be contacted, so that poor lapping is caused, and the yield of the touch display panel is limited.

The present disclosure provides a touch display panel, which can solve the above problems. The touch display panel comprises a functional area and a frame area surrounding the functional area, wherein the frame area comprises at least one lap joint area. The touch display panel further comprises a touch substrate and a display substrate. The touch substrate comprises a plurality of first terminals located in the lap joint area. The display substrate and the touch substrate are oppositely arranged and comprise a plurality of second terminals located in the overlapping area, the first terminals and the second terminals are in one-to-one corresponding overlapping, and the second terminals are linearly arranged. When the touch substrate and the display substrate are abutted, pressure is applied to the touch substrate and the display substrate, and under the support of the lap joint structure formed by the first terminal and the second terminal, the touch substrate or the display substrate may warp around the lap joint structure, so that poor contact between the first terminal and the second terminal in the adjacent lap joint structure is caused. In the touch display panel provided by the disclosure, because the second terminals are linearly arranged, in any direction intersecting with the arrangement track of the second terminals, each second terminal (or the lap joint structure) does not have other adjacent second terminals (or the lap joint structure), so that the risk of warping of the touch substrate or the display panel caused by the lap joint structure to other lap joint structures is reduced.

The structure of the touch display panel according to at least one embodiment of the present disclosure is described in detail below with reference to the accompanying drawings. In the embodiments corresponding to these figures, a spatial rectangular coordinate system is established with reference to the surface of the touch substrate, so as to describe the position of each structure in the touch display panel. For example, in the rectangular spatial coordinate system, the X axis and the Y axis are parallel to the surface of the touch substrate, and the Z axis is perpendicular to the surface of the touch substrate.

At least one embodiment of the present disclosure provides a touch display panel, as shown in fig. 1, fig. 2 and fig. 3, the touch display panel includes a functional area 10 and a frame area 20, the frame area 20 surrounds the functional area 10, and the frame area 20 includes 2 overlapping areas 21. The touch display panel further includes a touch substrate 100 and a display substrate 200 which are aligned. In the overlapping region 21, the touch substrate 100 includes a plurality of first terminals 110, the display substrate 20 includes a plurality of second terminals 210, and the first terminals 110 and the second terminals 210 are in one-to-one correspondence and are overlapped (e.g., contacted) together. The second terminals 210 in the landing zone 21 are arranged linearly.

It should be noted that, in the embodiments of the present disclosure, the second terminal exhibits a "linear arrangement" meaning that: and projecting the second terminals in the same lap joint area in a plane rectangular coordinate system determined by an X axis and a Y axis, wherein each second terminal is used as a coordinate point, and performing linear fitting on the coordinate points to obtain a fitting line which passes through the coordinate point corresponding to each second terminal. In addition, since the first terminals and the second terminals are in one-to-one correspondence to be lapped with each other, the linear arrangement of the second terminals in the lap zone also means the linear arrangement of the first terminals in the lap zone.

In an embodiment of the disclosure, the one-to-one correspondence between the first terminals and the second terminals may be that the number of the first terminals is equal to the number of the second terminals, and after the overlapping is completed, each first terminal overlaps with a specific second terminal, that is, the second terminals overlapped by different first terminals are different. In addition, when corresponding to each other, as long as there is overlap in the relative surface positions of the first terminal and the second terminal, the relationship in size of the dimensions of the surfaces of the first terminal and the second terminal for overlapping is not limited. Next, several sizes and positional relationships of the opposing surfaces of the first terminals and the second terminals are exemplarily described by several specific embodiments.

For example, in at least embodiments of the present disclosure, on the surface of the touch substrate, at least a portion of an orthogonal projection of the first terminal (or a surface thereof facing the second terminal) and at least a portion of an orthogonal projection of the second terminal (or a surface thereof facing the first terminal) are overlapped. Specifically, on the surface of the touch substrate, the orthographic projection of the first terminal (or the surface facing the second terminal) and the orthographic projection of the second terminal (or the surface facing the first terminal) are overlapped; alternatively, the orthographic projection of the first terminal (or a surface thereof facing the second terminal) is located within the orthographic projection of the second terminal (or a surface thereof facing the first terminal); alternatively, the orthographic projection of the second terminal (or a surface thereof facing the first terminal) is located within the orthographic projection of the first terminal (or a surface thereof facing the second terminal); alternatively, a part of the orthographic projection of the first terminal (or the surface thereof facing the second terminal) coincides with a part of the orthographic projection of the second terminal (or the surface thereof facing the first terminal), and the other part of the orthographic projection of the first terminal (or the surface thereof facing the second terminal) is located outside the orthographic projection of the second terminal (or the surface thereof facing the first terminal).

In at least one embodiment of the present disclosure, the opposing surfaces of the first and second terminals may be provided as flat surfaces, or at least one of the opposing surfaces of the first and second terminals may be provided with a recess, so that the first and second terminals may be snapped (e.g., snapped) together when overlapped. In the case that the first terminal or the second terminal is provided with the recess, the alignment of the first terminal and the second terminal is facilitated, the first terminal and the second terminal are prevented from being displaced during the pressing process, and the contact area is reduced, and accordingly, even if the displacement is not considered, the contact area of the first terminal and the second terminal can be increased (for example, the curved surface area is larger than the plane area under the same diameter).

For example, in some embodiments of the present disclosure, the opposing surfaces of the first and second terminals are not equal in size. For example, further, the surface of the first terminal or the second terminal having a relatively large-sized surface forms a recess in which the second terminal or the first terminal having a relatively small-sized surface is located when lapped. In this case, taking the surface size of the first terminal as an example larger than the surface size of the second terminal, after the overlapping, the end of the second terminal facing the first terminal is embedded in the recess of the surface of the first terminal, that is, on the surface of the touch substrate, the orthographic projection of the surface of the second terminal is located within the orthographic projection of the surface of the first terminal.

For example, in some embodiments of the present disclosure, the opposing surfaces of the first and second terminals are not equal in size. For example, a surface of one of the first terminal and the second terminal is formed with a recess, and a surface of the other thereof is formed with a projection, and the recess and the projection are matched. Taking the example of the first terminal having a recess formed on its surface and the second terminal having a protrusion formed on its surface, after the overlapping, the protrusions are inserted into the grooves to be locked together.

For example, in at least one embodiment of the present disclosure, the recess of the first terminal or the second terminal may further contain a conductive adhesive to fill a gap that may be generated between the first terminal and the second terminal when the first terminal and the second terminal are connected to each other, so as to reduce problems such as an excessive contact surface resistance caused by the gap, and to facilitate reduction of pressure loss. For example, the conductive adhesive may be a conductive silver adhesive, and may be specifically selected according to the requirements of the actual process, and is not limited herein.

For example, in some embodiments of the present disclosure, the process of forming the protrusion or the recess on the first terminal or the second terminal is not limited. For example, taking the formation of the recess on the second terminal as an example, the second terminal may be formed by depositing a film layer of conductive material on a support structure (see the related description in the following embodiments), for example, at least a portion of the support structure is formed in the same layer and material as the pixel defining layer, so that, while the patterning process is performed on the pixel defining layer to form the groove for accommodating the light emitting device, the groove is also formed on the surface of the support structure, so that, when the film layer of conductive material is deposited on the support structure to form the second terminal, the portion of the film layer of conductive material overlapping with the groove of the support structure forms the recess conformal with the groove, so that the arrangement of the recess does not increase the manufacturing process of the touch display panel additionally, which is beneficial for controlling the cost.

In the touch display panel provided in at least one embodiment of the present disclosure, the frame region further includes a frame sealing region surrounding the functional region, the lap region is located between the frame sealing region and the functional region, and the touch display panel further includes frame sealing glue. The frame sealing glue is located in the frame sealing area and surrounds the functional area and is used for bonding the touch substrate and the display substrate. In the direction perpendicular to the surface of the touch substrate, the thickness of the frame sealing glue is smaller than the sum of the thicknesses of the two first terminals and the second terminals which are overlapped with each other.

For example, as shown in fig. 1, fig. 2 and fig. 3, the frame region 20 includes a frame sealing region 22, and the frame sealing region 22 is located in an edge region of an overlapping region of the touch substrate 100 and the display substrate 200. The frame sealing adhesive 300 is disposed in the frame sealing region 22 to adhere the touch substrate 100 and the display substrate 200 together. Along the Z-axis direction, the height of the frame sealing adhesive 300 is less than the height of the overlapping structure (including the first terminal 110 and the second terminal 210 corresponding to each other). In the manufacturing process of the touch display panel, in consideration of factors such as process precision, height differences may exist between the first terminals 110, between the second terminals 210, between the first terminals 110 and the second terminals 210, and between the frame sealing adhesive 300 and the overlapping structure (including the first terminals 110 and the second terminals 210 corresponding to each other), so that the overlapping structure may have poor overlapping. The height of the frame sealing adhesive 300 is set to be smaller than that of the lap joint structure, so that the first terminal 110 and the second terminal 210 in the lap joint structure can be ensured to be more easily contacted under the condition that the touch substrate 100 and the display substrate 200 can be closed through the frame sealing adhesive 300, and the problem of poor lap joint caused by process precision is solved.

It should be noted that, in the embodiment of the disclosure, the frame sealing adhesive 300 may directly attach the touch substrate 100 and the display substrate 200 through the adhesion function, or may be further sintered (for example, laser sintered) to fix the touch substrate 100 and the display substrate 200 on the frame sealing adhesive 300, so as to improve the stability of the entire touch display panel.

In the embodiments of the present disclosure, the direction of the "thickness" is perpendicular to the surface of the touch substrate. For example, the frame sealing glue has a thickness: and in the direction (Z-axis direction) perpendicular to the surface of the touch substrate, the size of the packaging adhesive is larger.

In the touch display panel provided in at least one embodiment of the present disclosure, an extending trace of a gap between the bezel area and the function area surrounds the function area, and in each of the lap joint areas, the second terminals are arranged along the extending trace. In this way, when the touch substrate and the display substrate are combined, the pressure distribution applied by the frame region generally surrounds the functional region, and therefore, even if the touch substrate or the display panel is warped due to the overlapping structure, the warping deformation does not extend along the direction surrounding the functional region. For example, even if the touch substrate or the display panel is warped due to the overlapping structure, other adjacent overlapping structures are not in the extending direction of the warping deformation, so that the poor overlapping due to the warping does not exist. For example, in each of the lap regions, the second terminals are arranged linearly along the peripheral edge of the functional region. For example, when the touch display panel is provided with a frame sealing adhesive (or a frame sealing area), the normal of each position of the arrangement track of the second terminals extends from the frame sealing area to the function area. For example, further, the tangents of the intersections of the normal lines of any position of the arrangement tracks of the second terminals at the inner edge of the frame sealing region, the arrangement tracks, and the outer edge of the functional region (it is to be understood that the tangent line at any point of the straight line is the straight line itself) are parallel to each other. It should be noted that, in the case where the arrangement track of the second terminal corresponds to the corner region of the functional area, and the corners of the functional area and the frame sealing area are right angles, there may be a second terminal where the normal line passes through the vertex of the right angle, and the vertex is not tangent to the right angle, however, even if there is a second terminal located at the vertex of the right angle, a point infinitely close to the vertex is tangent to the vertex, so that in the case where the positions of other points (any point except the vertex) of the track line are determined, the positions of the vertices (or the second terminals) in the track are determined, that is, even if the track line on which the second terminal is arranged has a right angle, the specific shape of the track line can be determined in the above-mentioned scheme provided by the present disclosure.

In the following, taking the case that the touch display panel is provided with the frame sealing adhesive as an example, the working principle of the technical scheme (the second terminals are linearly arranged along the peripheral edge of the functional region to eliminate the poor overlapping) in the embodiment of the disclosure is more intuitively explained with reference to the accompanying drawings.

As shown in fig. 4, the first terminals 100 and the second terminals 200 form a lap joint structure arranged in an array (for example, a matrix or matrix-like arrangement), or a part of the lap joint structure is arranged from the frame sealing region to the functional region. Because the sealant 300 ' is configured to have a relatively smaller thickness than the overlapping structure formed by the first terminal 110 ' and the second terminal 210 ', when the touch substrate 100 ' and the display substrate 200 ' are combined, it is desirable to ensure that the first terminal 110 ' and the second terminal 210 ' are in good contact. However, since the frame sealing adhesive 300 ' is a peripheral structure relative to the overlapping structure, when the touch substrate 100 ' and the display substrate 200 ' are bonded, because there is a break between the overlapping structure and the frame sealing adhesive 300 ', there is a deformable (e.g., bending) space in the position of the frame sealing adhesive 300 ' of the touch substrate 100 ', so that the overlapping structure and the touch substrate 100 ' form a lever structure, a portion of the touch substrate 100 ' close to the frame sealing region sags, and a portion of the touch substrate 100 ' close to the functional region upwarps, so that a gap or a severe separation occurs between the first terminal 110 ' and the second terminal 210 ' in the partial overlapping structure close to the functional region (see region a in fig. 4), thereby causing a poor overlapping of the overlapping structure.

In the embodiment of the present disclosure, referring to fig. 1 and 2, the overlapping structures formed by the first terminals 110 and the second terminals 210 are linearly arranged along the peripheral edge of the functional region 10, so that no other overlapping structure exists before or after any overlapping structure in the direction from the frame sealing region 22 to the functional region 10. In this way, even if the touch substrate 100 is warped due to the bonding structure when the touch substrate 100 and the display substrate 200 are bonded together, the warping does not cause the touch substrate 100 to warp at other bonding structures because the warping extends toward the functional region 10 relative to the bonding structure, i.e., the first terminals 110 and the second terminals 210 of other bonding structures are still in close contact.

In the touch display panel provided by at least one embodiment of the present disclosure, a distance from the lap area to the frame sealing area is smaller than a distance from the lap area to the functional area. Therefore, the lap joint structure can be closer to the frame sealing area, and when the touch substrate and the display substrate are pressed, the adverse effect on elements in the functional area caused by warping can be relieved. For example, as shown in fig. 1 and fig. 2, a distance from the overlapping structure (including the corresponding first terminal 110 and the second terminal 210) to the frame sealing adhesive 300 is smaller than a distance from the overlapping structure to the functional region 10.

In the touch display panel provided by at least one embodiment of the present disclosure, in each of the overlapping areas, the distances from the second terminals to the frame sealing area are the same; and/or the distance from the second terminal to the functional area is the same in each of the lap joint areas. So, the distance of different overlap joint structures relative seal frame district and/or functional area is the same, when pressfitting touch-control base plate and display substrate, can be so that the pressure that each overlap joint structure received is roughly the same, avoids the uneven problem that leads to of pressure distribution: the partial lapping structure is damaged due to overlarge pressure or poor lapping due to the overlong pressure. For example, as shown in fig. 1 and fig. 2, in each of the overlapping regions 21, the distances from the respective overlapping structures (including the corresponding first terminal 110 and the corresponding second terminal 210) to the frame sealing adhesive 300 are equal. In this way, when the touch substrate 100 and the display substrate 200 are bonded together, the pressure distribution in the area where each of the lap structures is located is also uniform when the pressure applied to the frame sealing region 22 is uniform.

It should be noted that, in the embodiment of the present disclosure, a specific shape of the line shape formed by the second terminals in each overlapping region is not limited, and may be designed according to a requirement of an actual process. For example, the design may be performed according to the shape of the frame of the touch display panel, the specific arrangement of the signal lines of the touch substrate and the display substrate, and the like. Next, a specific arrangement of the second terminals will be described by way of several specific examples.

In some embodiments of the present disclosure, in each overlapping region, the second terminals are arranged in a folding line, and the folding line includes a first straight line segment and a second straight line segment connected to each other. Under the condition that the second terminal is the broken line and arranges, the overlap joint district can set up the corner region at the touch-control base plate to the shape of arranging of second terminal can match with the shape in the corner region of touch-control base plate, is favorable to improving the space utilization in touch-control display panel's frame district. For example, as shown in fig. 1 and fig. 2, in the overlapping region 21, the overlapping structure formed by the first terminal 110 and the corresponding second terminal 210 is arranged in a shape of a broken line, the broken line is formed by connecting two straight line segments (the first straight line segment and the second straight line segment), one end point of each of the two straight line segments is connected, and the straight lines where the two straight line segments are located intersect, so that the line formed by the two straight line segments is the broken line. The bonding region 21 is located in a corner region of the touch substrate, and an inner corner of the folding line faces an outer corner of the functional region 10. For example, as shown in fig. 1, in the case where the first and second straight segments are perpendicular, the shape of the overlapping region may be referred to as "L" shape, or right-angle shape.

In some embodiments of the disclosure, the second terminals are linearly arranged in each of the overlapping areas. For example, further, the straight line is parallel to one side of the touch display panel. Therefore, the warping generated at any lapping structure can not extend to the area where other lapping structures are positioned, and the problem of poor lapping is solved. Illustratively, as shown in fig. 5, in the overlapping region 21a, the overlapping structure of the first terminal 110a and the corresponding second terminal (not shown) is arranged in a straight line, and the overlapping region 21a is located in one side of the frame region 20, and the straight line is parallel to the extending direction of the side.

In the touch display panel provided by another embodiment of the present disclosure, in each overlapping area, the second terminals are arranged in a broken line, and the broken line includes a first straight line segment, a curved line segment and a second straight line segment which are sequentially connected end to end. For example, the touch display panel may have an R-angle, and the curve segment corresponds to and conforms to the R-angle. Under the condition that the second terminal is the broken line and arranges, the overlap joint district can set up the corner region at the touch-control base plate to the shape of arranging of second terminal can match with the shape in the corner region of touch-control base plate, is favorable to improving the space utilization in touch-control display panel's frame district. Illustratively, as shown in fig. 6, in the overlapping region 21b, the overlapping structure of the first terminal 110b and the corresponding second terminal (not shown) is arranged in a shape of a broken line, and the broken line is formed by connecting two straight line segments (the first straight line segment and the second straight line segment) and a curved line segment, and one end point of each of the two straight line segments is respectively connected to two end points of the curved line segment. For example, the landing areas 21b are located at the corner areas of the touch substrate 100, and the curved portions of the broken lines correspond to the corners of the functional areas 10, and both the touch substrate 100 and the functional areas 10 have an R-corner (e.g., a rounded corner), and the curvature of the curved segment is the same as that of the R-corner.

In the embodiment of the present disclosure, the "correspondence" between the curved line segment and the R angle of the touch display panel may be understood as: for two sides of the touch display panel for forming the R-angle, the curve segment is located in a meeting area of the two sides. For example, the extension line of the diagonal line of the touch display panel passes through the curve segment; for another example, taking the planar shape of the touch display panel as a rectangle with an R corner as an example, the curved line segment is a portion of a rectangular frame with an R corner located at the R corner, and when the line width of the rectangular frame is neglected, the rectangular frame is conformal and concentric (centroid) with the shape of the outer edge of the touch display panel.

In the embodiment of the disclosure, the number of the overlapping zones included in the frame zone is not limited, and the distribution of the overlapping zones in the frame zone is not limited, and the number of the overlapping zones in the frame zone can be specifically adjusted according to the requirements of the actual process. For example, in some embodiments of the present disclosure, the overlapping region may be moved to a region of the corresponding display substrate where no signal line is disposed, in consideration that the overlapping of the display substrate and the touch substrate does not affect the wiring design of the display substrate. For example, the display substrate includes a signal line integration region (e.g., a first wiring region described below), and the landing region may be disposed on one side or both sides of the signal line integration region.

In the touch display panel provided in at least one embodiment of the present disclosure, the frame region further includes a bonding region located on the display substrate, the touch substrate is located outside the bonding region, at least one of the bonding regions includes a first bonding region and a second bonding region, and the frame region further includes a first wiring region extending from the functional region to the bonding region. Through setting up two overlap joint district, can disperse the density of arranging of overlap joint structure, avoid overlap joint structure gathering in a region and lead to this region to need great design width to be favorable to the frame district to carry out extremely narrowing design. Illustratively, as shown in fig. 1 and 3, bezel area 20 includes a bonding area 23. The bonding area 23 is located in a region of the display substrate 200 that is not overlapped with the touch substrate 100, terminals are disposed in the bonding area 23, and signal lines (the second type of traces in the following embodiments) of the display substrate 200 and signal lines (the first type of traces in the following embodiments) of the touch substrate 100 that are connected to the display substrate through a bonding structure are integrated in the bonding area 23 and connected to other circuit structures (e.g., a flexible circuit board and a control chip in the following embodiments) through the terminals disposed in the bonding area 23. The frame region 20 further includes a first wiring region 24, and the signal lines of the display substrate 200 extend into the bonding region 23 through the first wiring region 24.

In the touch display panel provided in at least one embodiment of the present disclosure, the first and second strapping regions are located at two sides of the first wiring region. For example, further, the second terminals in the first bonding region and the second terminals in the second bonding region are distributed in axial symmetry, and the extending direction of the symmetry axis is parallel to the direction from the functional region to the bonding region. Therefore, when the touch substrate and the display substrate are combined, the arrangement of the lap joint structures of the two lap joint areas is axisymmetric, so that the pressure applied to the two lap joint areas is the same, the inclination of the touch substrate and the display substrate when combined caused by the pressure difference of the lap joint areas is avoided, and the thickness uniformity of the touch display panel is favorably improved. Illustratively, as shown in fig. 1 and 2, two bonding areas 21 are located at two corners of the touch substrate, and the edge defined by the two corners is the edge of the touch substrate facing the bonding area 23. The direction from functional region 10 to bonding region 23 is parallel to the Y-axis. The layout pattern of the lap joint structures (including the corresponding first terminals and second terminals) in the two lap joint regions 23 is represented as "L" shape, the two "L" are arranged in axial symmetry, and the symmetry axis is parallel to the Y axis.

In the touch display panel provided in at least one embodiment of the present disclosure, the frame region further includes a second wiring region extending from the lap region to the bonding region. The display substrate further comprises a control chip, a flexible circuit board and a plurality of first-type wires. One end of the flexible circuit board is used for bearing the control chip, and the other end of the flexible circuit board is bonded in the bonding area. The first type of wires are located in the second wiring area, one end of each first type of wire is connected with the second terminal, and the other end of each first type of wire extends to the bonding area to be connected with the flexible circuit board. The control chip is connected with the first terminal of the touch substrate through the flexible circuit board, the first type of wires and the second terminal, and can control the touch function of the touch substrate. For example, as shown in fig. 1 to fig. 3, one end of the flexible circuit board 230 fixes the control chip 220, and the other end thereof is bonded in the bonding area 23 of the display substrate 200, the frame area 20 includes a second wiring area 25, and the signal lines of the touch substrate 100 are connected to the first type of traces after being connected to the display substrate 100. The first type of trace extends into the bonding area 23 through the second wiring area 25 to be connected to the control chip 220 through the flexible circuit board 230. In this way, the control chip 220 can control the touch function of the touch substrate 100.

For example, the control chip may be a central processing unit, a digital signal processor, a single chip, a programmable logic controller, or the like. For example, the control chip may further include a memory, a power module, and the like, and implement power supply and signal input and output functions through additionally provided wires, signal lines, and the like. For example, the control chip may also include hardware circuitry, computer executable code, and the like. The hardware circuits may include conventional Very Large Scale Integration (VLSI) circuits or gate arrays and off-the-shelf semiconductors such as logic chips, transistors, or other discrete components; the hardware circuitry may also include field programmable gate arrays, programmable array logic, programmable logic devices, or the like.

For example, the flexible circuit board 230 may be bent to bend the control chip 220 to the back side of the touch display panel, so as to reduce the bezel width of the touch display panel. For example, in the case that the display substrate 200 is set to the top emission mode, the control chip 220 is bent to a side of the display substrate 200 away from the touch substrate 100; alternatively, when the display substrate 200 is set to the bottom emission mode, the control chip 220 is bent to a side of the touch substrate 100 away from the display substrate 200.

In the touch display panel provided by at least one embodiment of the present disclosure, a portion of the touch substrate located in the functional region is a touch functional region, the touch substrate includes a touch electrode layer located in the touch functional region, the touch electrode layer includes a plurality of driving electrodes and a plurality of sensing electrodes, the driving electrodes and the sensing electrodes intersect with each other, the touch substrate further includes driving signal lines and sensing signal lines, one end of the driving signal line is connected to the driving electrodes, the other end of the driving signal line is connected to the first terminals, one end of the sensing signal line is connected to the sensing electrodes, and the other end of the sensing signal line is connected to the first terminals. The display substrate comprises an array substrate, a display function layer and a second wiring, wherein the display function layer and the second wiring are arranged on the array substrate, the display function layer is arranged in the display area, the second wiring is arranged in the first wiring area, one end of the second wiring extends to the display area, and the other end of the second wiring extends to the bonding area to be connected with the flexible circuit board. For example, at least one of the driving electrode and the sensing electrode is formed on the same layer and material as the first terminal, thereby simplifying the manufacturing process of the touch substrate and reducing the cost.

For example, as shown in fig. 1 to fig. 3, the touch substrate 100 includes a first substrate 120 and a touch electrode layer 130 located on the first substrate 120, and the touch electrode layer 130 is located in a touch functional area, which is equivalent to the functional area 10 of the touch display panel. Touch units are disposed in a touch functional area (an area located in the functional area 10) of the touch substrate 100, driving electrodes and sensing electrodes included in the touch substrate 100 intersect with each other, and an intersection is formed in each touch unit, so that a mutual inductance capacitor is formed in each touch unit, if a finger (or a fingerprint) approaches a touch unit, a capacitance value of the mutual inductance capacitor in the touch unit changes, and the touch unit where the mutual inductance capacitor with the changed capacitance value is located is screened out by detecting the capacitance value of the mutual inductance capacitor of each touch unit, so that a touch (or fingerprint) position is detected to realize touch control. The driving signal lines connected to the driving electrodes and the sensing signal lines connected to the sensing electrodes are disposed in the touch substrate 100, and the driving signal lines and the sensing electrodes are also connected to the first terminals 110 to be connected to the first type of traces on the display substrate 200, so that the control chip 220 can apply scanning signals to the driving electrodes and receive sensing signals from the sensing electrodes to detect capacitance values of mutual capacitances of the touch units, thereby determining whether or not a touch event occurs and determining the occurrence position of the touch event.

For example, as shown in fig. 1 to fig. 3, the display substrate 200 includes an array substrate 240 and a display function layer 250 located on the array substrate 240, where the display function layer 250 is located in a display area of the display substrate 200, which is equivalent to the functional area 10 of the touch display panel. The display substrate may be an organic light emitting diode display substrate (OLED substrate), and the OLED substrate may be set to have a top emission mode or a bottom emission mode as required. The array substrate may include a second substrate 241 and a driving circuit layer 242. The driving circuit layer 242 may include a pixel driving circuit including a plurality of transistors, capacitors, and the like, for example, formed in various forms of 2T1C (i.e., 2 transistors (T) and 1 capacitor (C)), 3T1C, or 7T 1C. The pixel driving circuit may be connected to the bonding area 23 through a second type of traces to be connected to the control chip 220 through the flexible circuit board 230, so that the control chip 220 can control the display function of the display substrate 200.

For example, the second type of routing lines may include gate lines, data lines, power supply lines, frame scan lines, reset lines, common electrode lines, and the like.

In a touch display panel provided in at least one embodiment of the present disclosure, a display function layer includes a plurality of light emitting devices on an array substrate, and the light emitting devices include an anode layer, a light emitting function layer, and a cathode layer sequentially stacked on the array substrate. The second terminal and the cathode layer are formed in the same layer and the same material, and/or at least part of the second type of routing and the anode layer are formed in the same layer and the same material. Therefore, the second terminal and at least part of the second type of wires are arranged without increasing the manufacturing process flow of the display substrate, so that the design of the display substrate is simplified, and the cost control is facilitated.

For example, a pixel defining layer is disposed in the display function layer, and the pixel defining layer is located on a side of the anode facing away from the array substrate. The pixel defining layer is provided with a through hole for exposing the anode, the light-emitting functional layer is positioned in the through hole, and the cathode is positioned on one side of the pixel defining layer, which is far away from the array substrate, and covers the pixel defining layer and the light-emitting functional layer. In the preparation process of the display substrate, a first conductive film layer may be provided and patterned, wherein a portion of the first conductive film layer located in the display region (functional region) is formed as an anode, and a portion of the first conductive film layer located in the frame region is formed as at least a portion of the second type of trace; sequentially forming a pixel defining layer and a light emitting functional layer on the anode layer; then, a second conductive film layer is deposited on the pixel defining layer, and patterning is performed on the second conductive film layer, wherein a portion of the second conductive film layer located in the display region (functional region) is formed as a cathode, and a portion of the second conductive film layer located in the frame region is formed as a second terminal. For example, the second type of trace is not covered by the pixel defining layer, so that the portion of the second conductive film layer located in the frame area directly contacts the second type of trace, or, in the process of forming the pixel defining layer, a via hole exposing the second type of trace is formed in the portion of the pixel defining layer located in the frame area, and the second conductive film layer contacts the second type of trace through the via hole.

For example, in embodiments of the present disclosure, a support structure may be provided in the second terminal to increase the thickness of the second terminal. For example, the support structure may be a barrier dam surrounding the display area. For example, at least a portion of the isolation dam may be formed in the same layer and material as the pixel defining layer. For example, the material of the pixel defining layer may be a photoresist (photoresist), so as to simplify the process steps of forming the via hole in the pixel defining layer and forming the support structure using the pixel defining layer, thereby reducing the cost.

For example, the patterning process may be a lithographic patterning process, which may include, for example: the method includes the steps of coating photoresist on a structural layer to be patterned, exposing the photoresist by using a mask plate, developing the exposed photoresist to obtain a photoresist pattern, etching the structural layer by using the photoresist pattern (optional wet etching or dry etching), and then optionally removing the photoresist pattern. In the case that the material of the structural layer is photoresist, the structural layer may be directly exposed through a mask plate to form a desired pattern.

For example, the touch display panel provided by the embodiments of the present disclosure may be any product or component having a display function, such as a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.