CN115877984A

CN115877984A - Touch panel and touch display device

Info

Publication number: CN115877984A
Application number: CN202211626181.XA
Authority: CN
Inventors: 杨肖辉; 张彩霞
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-03-31

Abstract

The application provides a touch panel and a touch display device, wherein the touch panel comprises a substrate, and an insulating layer, a touch electrode layer and a plurality of signal lines which are arranged on the same side of the substrate. The touch electrode layer comprises a plurality of first touch electrodes which are arranged in parallel along a first direction. The plurality of signal lines correspond to the plurality of first touch electrodes one to one. The plurality of signal lines are arranged in parallel along a second direction intersecting the first direction. The signal line includes a first sub-signal line and a second sub-signal line connected in parallel. The first sub-signal line is located in the at least one non-kink region. The second sub-signal line is located in the bending area and the at least one non-bending area, and the second sub-signal line and the first touch electrode are located on the surface of the same side of the insulating layer and are connected with each other. According to the touch panel, the risks of cracks or fractures and the like of parts, located in the bending area, of the plurality of signal lines can be reduced while the impedance of the signal lines is reduced, and therefore the service life of the touch panel is prolonged.

Description

Touch panel and touch display device

Technical Field

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

Background

With the development of touch technology, users have higher and higher requirements for electronic products with touch panels, such as touch performance and portability, and bendable electronic products are increasingly popular in the market due to the advantages of good portability and the like. However, the current electronic product with a touch function is limited by its design, and when the electronic product is bent, cracks are easily generated to cause touch failure, thereby reducing the service life of the electronic product.

Disclosure of Invention

In view of this, the application provides a touch panel and a touch display device, by setting a signal line of the touch panel as two parallel sub-signal lines, one of the two sub-signal lines is located in a non-bending region, and the other of the two sub-signal lines is located in both a bending region and the non-bending region, the impedance of the signal line is reduced, and meanwhile, the risk of cracks or fractures in portions of the plurality of signal lines located in the bending region is also reduced, so that the service life of the touch panel is prolonged.

A first aspect of the present application provides a touch panel including a bending region and at least one non-bending region. The touch panel also comprises a substrate, and an insulating layer, a touch electrode layer and a plurality of signal wires which are arranged on the same side of the substrate. The touch electrode layer comprises a plurality of first touch electrodes which are arranged in parallel along a first direction. The plurality of signal lines correspond to the plurality of first touch electrodes one to one. The plurality of signal lines are arranged in parallel along a second direction intersecting the first direction. Each signal line includes a first sub-signal line and a second sub-signal line connected in parallel. The first sub-signal line is located in the at least one non-bending area. The second sub-signal line is located in the bending area and the at least one non-bending area, and the second sub-signal line and the first touch electrode are located on the surface of the same side of the insulating layer and are connected with each other.

In the above scheme, the first sub-signal line is located in the at least one non-bending region, the second sub-signal line is located in the bending region and the at least one non-bending region simultaneously, and the second sub-signal line and the first touch electrode are both located on the same surface of the insulating layer, so that the part of the signal line located in the bending region is of a single-layer metal routing structure, the part of the signal line located in the non-bending region is of a double-layer metal routing structure, and the part of the signal line located in the bending region and the first touch electrode form the same single-layer metal routing structure.

In a particular embodiment of the first aspect of the present application, the at least one non-inflection region includes a first non-inflection region and a second non-inflection region on opposite sides of the inflection region. A first sub-signal line of the at least one signal line includes a first sub-signal portion located in the first non-bending region and a second sub-signal portion located in the second non-bending region. The first sub-signal part and the second sub-signal part are arranged at intervals. The distance between the first sub-signal portion and the second sub-signal portion along the first direction is not less than the width of the bending region along the first direction. Therefore, the part of the signal wire, which is positioned in the bending area, can be ensured to be a single-layer metal wiring structure, and when the distance between the first sub-signal part and the second sub-signal part in the first direction is greater than the width of the bending area in the first direction, the part of the second sub-signal wire, which is positioned in the bending area, can be further prevented from generating new section difference, so that the risk of layering or breaking of the part of the second sub-signal wire, which is positioned in the bending area, is further reduced.

In a particular embodiment of the first aspect of the present application, the insulating layer is provided with at least one first via. The first sub-signal line is connected with the second sub-signal line through the first through hole. Therefore, the first sub-signal line is connected with the second sub-signal line in parallel through the first through hole, the impedance of the signal line is reduced, the requirement on driving voltage is reduced, and the power consumption of the touch panel is reduced.

In one specific implementation manner of the first aspect of the present application, a first groove corresponding to the first through hole is disposed on the first sub-signal line. The first sub-signal line is connected with the second sub-signal line through the first through hole and the first groove. In this way, the contact area at the connecting position of the first sub-signal line and the second sub-signal line is increased by the first groove, so that the reliability of the parallel connection of the first sub-signal line and the second sub-signal line is higher.

In one embodiment of the first aspect of the present application, the first touch electrode includes a plurality of first touch electrode blocks arranged in parallel along the second direction. The touch electrode layer further comprises a plurality of second touch electrodes arranged along the second direction, and a plurality of conductive bridges located on one side of the substrate facing the first touch electrodes and the second touch electrodes. Each first touch electrode and each second touch electrode are crossed with each other to form a plurality of touch units. The insulating layer covers the surface of one side, away from the substrate, of the conductive bridge and is provided with a plurality of second through holes. The conductive bridge is connected with two adjacent first touch electrode blocks through at least two second through holes. Further, the conductive bridge is in the same layer and/or the same material as the first sub-signal line. Thus, if the conductive bridge and the first sub-signal line are on the same layer, the conductive bridge and the first sub-signal line can be located on the same surface of the substrate. If the conductive bridge and the first sub-signal line are made of the same material, the cost is reduced. If the conductive bridge and the first sub-signal line are on the same layer and are made of the same material, the conductive bridge can be positioned on one side of the insulating layer facing the substrate, and the first sub-signal line can be synchronously formed while the conductive bridge of the touch electrode layer is manufactured, so that the manufacturing process flow of the touch panel is simplified, and the cost is reduced.

In one embodiment of the first aspect of the present application, the first touch electrode includes a plurality of first touch electrode blocks arranged in parallel along the second direction. The touch electrode layer further comprises a plurality of second touch electrodes arranged along the second direction, and a plurality of conductive bridges located on one side of the substrate facing the first touch electrodes and the second touch electrodes. Each first touch electrode and each second touch electrode are crossed with each other to form a plurality of touch units. The insulating layer covers the surfaces of the first touch electrode and the second touch electrode, which are far away from one side of the substrate, and is provided with a plurality of second through holes, and the conductive bridge is connected with two adjacent first touch electrode blocks through at least two second through holes. Further, the conductive bridge is in the same layer and/or the same material as the first sub-signal line. Thus, if the conductive bridge and the first sub-signal line are on the same layer, the conductive bridge and the first sub-signal line can be located on the same surface of the insulating layer. The conductive bridge and the first sub-signal line are made of the same material, which is beneficial to reducing the cost. If the conductive bridge and the first sub-signal line are on the same layer and made of the same material, the conductive bridge is located on one side, away from the substrate, of the insulating layer, and the first sub-signal line can be synchronously formed while the conductive bridge of the touch electrode layer is manufactured, so that the manufacturing process flow of the touch panel is simplified, and the cost is reduced.

In one embodiment of the first aspect of the present application, the second sub-signal line is formed in the same layer and/or the same material as at least one of the first touch electrode and the second touch electrode. Therefore, the second sub-signal lines can be synchronously formed while the first touch electrode and/or the second touch electrode of the touch electrode layer are/is manufactured, so that the manufacturing process flow of the touch panel is simplified, and the cost is reduced.

In a specific embodiment of the first aspect of the present application, the bending region includes a first touch functional region and a first frame region located at a periphery of the first touch functional region. Along the second direction, as the linear distance between the at least two signal lines and the first touch functional area is from near to far, the width of at least one part of the at least two signal lines, which is positioned in the bending area, is gradually reduced. Therefore, the bending stress resistance of the signal line which is closer to the first touch functional area in the at least two signal lines is better, and the influence caused by different bending stresses on parts of different signal lines in the bending area is avoided or improved.

In a specific embodiment of the first aspect of the present application, the non-bending region includes a second touch functional region and a second frame region located at a periphery of the second touch functional region. Along the second direction, along with the straight-line distance between the at least two signal lines and the second touch functional area from near to far, the width of at least one part of the at least two signal lines, which is positioned in the non-bending area, is gradually increased. Therefore, the impedance of at least one part of the at least two signal lines in the non-bending area is sequentially increased along with the increase of the width, and the condition that the impedance of the at least two signal lines is not matched is avoided or improved.

A second aspect of the present application provides a touch display device, which includes a display panel and the touch panel in any one of the embodiments of the first aspect. The touch panel is located on the display side of the display panel.

Drawings

Fig. 1 is a schematic plan view of a touch panel.

Fig. 2 is a partially enlarged schematic view of the structure in the area a of the touch panel shown in fig. 1.

Fig. 3 is an enlarged cross-sectional view of the touch panel shown in fig. 2 taken along a line A1-B1.

Fig. 4 is a schematic plan view illustrating a touch panel according to an embodiment of the present disclosure.

Fig. 5 is a partially enlarged schematic view of the structure in the area B of the touch panel shown in fig. 4.

Fig. 6 is an enlarged cross-sectional view of the touch panel shown in fig. 5 taken along a line A2-B2.

Fig. 7 is an enlarged cross-sectional view of the touch panel shown in fig. 5 taken along a line A3-B3.

Fig. 8 is an enlarged cross-sectional view of a portion of the touch panel shown in fig. 5 taken along a line A3-B3.

Fig. 9 is an enlarged cross-sectional view of the touch panel shown in fig. 5 taken along a line A3-B3.

Fig. 10 is a partially enlarged schematic view of another structure in the area B of the touch panel shown in fig. 4.

Fig. 11 is a partially enlarged schematic view of a structure in the area B of the touch panel shown in fig. 4.

Fig. 12 is a schematic enlarged partial view of the structure in the area B of the touch panel shown in fig. 4.

Fig. 13 is a schematic enlarged partial view of the structure in the area B of the touch panel shown in fig. 4.

Fig. 14 is an enlarged cross-sectional view of the touch panel shown in fig. 13 taken along a line A4-B4.

Fig. 15 is an enlarged cross-sectional view of a portion of the touch panel shown in fig. 13 taken along a line A5-B5.

Fig. 16 is a schematic cross-sectional structure view of a touch display device according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Electronic products with touch panels are widely popular among users due to their advantages such as convenience of operation and functional diversity. With the development of technology, users have made higher and higher demands on the performance, such as touch performance and portability, of electronic products having touch panels. In order to improve convenience of an electronic product having a touch panel, a bending region is usually disposed on the touch panel. However, when the current electronic product is bent, cracks are very likely to occur in the bending area, so that touch failure is caused, and the service life of the electronic product is reduced.

As shown in the drawings, a spatial rectangular coordinate system is established based on the surface of the touch panel to define the positions of the touch panel and thus each element in the touch display device. In the rectangular spatial coordinate system, the X axis is the length direction of the touch panel, the Y axis is the width direction of the touch panel, the X axis and the Y axis are parallel to the surface of the touch panel, and the Z axis is perpendicular to the surface of the touch panel.

Referring to fig. 1 to 3, the touch panel 100 generally includes a bending region 11 and at least one non-bending region 12. The touch panel 100 further includes a substrate 110, and an insulating layer 120, a touch electrode layer 130 and a plurality of signal lines 140 disposed on the same side of the substrate 110. The touch electrode layer 130 includes a plurality of first touch electrodes 131 arranged in parallel along a first direction (for example, the first direction may be a Y-axis direction) and a plurality of second touch electrodes 132 arranged in parallel along a second direction (for example, the second direction may be an X-axis direction) intersecting the first direction, and each of the first touch electrodes 131 and each of the second touch electrodes 132 intersect with each other to form a plurality of touch units S1. The signal lines 140 correspond to the first touch electrodes 131 one to one, and are arranged in parallel along a second direction (e.g., an X-axis direction). It should be noted that the first touch electrode 131 may include a plurality of first touch electrode blocks, the touch electrode layer 130 may further include a plurality of conductive bridges 133, and the conductive bridges 133 may connect two adjacent first touch electrode blocks, so as to form the first touch electrode 131. The conductive bridge 133 may be located on a side of the first touch electrode 131 facing the substrate 110 as shown in fig. 3, or may be located on a side of the first touch electrode 131 facing away from the substrate 110.

If the signal line is a single-layer metal trace structure, it is assumed that the signal line includes a first sub-signal line 141, and the resistance of the first sub-signal line 141 is R ₁ ，R ₁ The larger the impedance is, the higher the requirement on the driving voltage of the touch panel is, and the larger the power consumption of the touch panel is. In order to reduce the requirement for the driving voltage, the signal line is usually configured as a double-layer metal routing structure, and the double-layer metal routing structure may be formed as a parallel structure (for example, the second sub-signal line 142 is connected in parallel on the basis of the original first sub-signal line 141, and it is assumed that the resistance of the second sub-signal line 142 is R ₂ Then the resistance after parallel connection R = (R) ₁ ×R ₂ )/(R ₁ +R ₂ ) Since R is less than R) ₁ Accordingly, the resistance of the signal line itself is reduced, and the power consumption of the touch panel 100 is reduced.

However, it is found through careful study that, on one hand, the signal line 140 of the double-layer metal trace structure is easily layered or broken in the bending process due to the multi-layer stacked structure thereof, and on the other hand, at the position where the signal line 140 is connected to the first touch electrode 131, the first touch electrode 131 is a single-layer metal structure, and the signal line 140 is a double-layer metal trace structure, when the touch panel 100 is bent, the bending stress applied to the part of the signal line 140 located in the bending region 11 is different from the bending stress applied to the first touch electrode 131 due to the difference between the structure of the part of the signal line 140 located in the bending region 11 and the structure of the first touch electrode 131, which also makes the part of the signal line 140 located in the bending region 11 easily crack, resulting in failure or even breaking.

In order to solve at least one of the above problems, at least one embodiment of the present application provides a touch panel and a touch display device, where a first sub-signal line is disposed in at least one non-bending region, and a second sub-signal line is disposed in both the bending region and the at least one non-bending region, so that a portion of the signal line that is located in the bending region is a single-layer metal routing structure, a portion of the signal line that is located in the non-bending region is a double-layer metal routing structure, and both the second sub-signal line and a first touch electrode are disposed on a same surface of an insulating layer, so that a portion of the signal line that is located in the bending region and the first touch electrode form a single-layer metal routing structure.

Hereinafter, a touch panel and a touch display device in at least one embodiment of the present application are described with reference to the drawings.

In the touch panel 200 provided in at least one embodiment of the present application, for example, referring to fig. 4 to 6, the touch panel 200 includes a bending region 21 and at least one non-bending region 22. The touch panel 200 further includes a substrate 210, and an insulating layer 220, a touch electrode layer 230 and a plurality of signal lines 240 disposed on the same side of the substrate 210. The touch electrode layer 230 includes a plurality of first touch electrodes 231 arranged in parallel along a first direction (e.g., a Y-axis direction). The signal lines 240 correspond to the first touch electrodes 231 one by one, and are arranged in parallel along a second direction (e.g., an X-axis direction) intersecting the first direction. Each signal line 240 includes a first sub-signal line 241 and a second sub-signal line 242 connected in parallel. The first sub-signal line 241 is located in at least one non-bending region 22. The second sub-signal line 242 is located in the bending region 21 and the at least one non-bending region 22, and the second sub-signal line 242 and the first touch electrode 231 are located on the same side surface of the insulating layer 220 and are connected to each other. Thus, by arranging the first sub-signal line 241 in the at least one non-bending region 22 and the second sub-signal line 242 in the bending region 21 and the at least one non-bending region 22, the portion of the signal line 240 in the non-bending region 22 is a double-layer metal routing structure, and the portion of the signal line 240 in the bending region 21 is a single-layer metal routing structure, so that the impedance of the signal line 240 is reduced compared with the case that the existing whole signal line is set as the single-layer metal routing structure, and compared with the case that the existing whole signal line is set as the double-layer metal routing structure, the risk of cracks or fractures and the like of the portions of the plurality of signal lines 240 in the bending region 21 is reduced, and the service life of the touch panel 200 is further prolonged. In addition, by arranging that the second sub-signal line 242 and the first touch electrode 231 are both located on the same surface of the insulating layer 220, the portion of the signal line 240 located in the bending region 21 and the first touch electrode 231 form a single-layer metal routing structure, and the second sub-signal line 242 and the first touch electrode 231 are connected in the same layer, which is beneficial to alleviating stress influence caused by bending, and further reduces the risk of cracks or fractures of the signal line 240.

The first direction may be a direction parallel to the Y axis, or may be another direction intersecting the Y axis within the plane in which the touch panel 200 is located. The second direction may be a direction perpendicular to the first direction (for example, if the first direction is parallel to the Y axis, the second direction may be an X axis perpendicular to the Y axis), or may be another direction intersecting the first direction in the plane of the touch panel 200.

The surface of the insulating layer 220 facing away from the substrate 210 may be a flat surface (i.e., a surface parallel to the surface of the touch panel 200) or an uneven surface. The insulating layer 220 may be a film layer with a uniform thickness or a film layer with a non-uniform thickness. The material of the insulating layer 220 may be any material as long as it can function as an insulator, and for example, the material of the insulating layer 220 may be silicon nitride, silicon oxide, silicon oxynitride, or the like.

The number of the signal lines 240 may be determined according to the number of the first touch electrodes 231, and the number of the first touch electrodes 231 may be set according to actual requirements.

The first sub-signal line 241 may be prepared in any manner as long as the first sub-signal line 241 is located in the at least one non-bending region 22, and on this basis, the preparation method of the first sub-signal line 241 is not specifically limited in this embodiment of the application. For example, in some embodiments, a single-layer metal trace structure may be formed in both the bending region 21 and the at least one non-bending region 22, and then the single-layer metal trace structure in the bending region 21 is hollowed out by etching or the like, so as to obtain the first sub-signal line 241. For another example, in other embodiments, a single-layer metal trace structure may be formed only in the at least one non-bending region 22 by using a mask or the like, so as to obtain the first sub-signal line 241.

The number of the bending regions 21 may be one or more. The number of the at least one non-bending region 22 may be one or more. In the following, the case where the number of the bending regions 21 is one and the number of the at least one non-bending region 22 is plural will be exemplified with reference to several embodiments.

In the touch panel 200 provided in at least one embodiment of the present application, referring to fig. 7 to 9 and 15, for example, the at least one non-bending region 22 includes a first non-bending region 22a and a second non-bending region 22b located at two opposite sides of the bending region 21. The first sub-signal line 241 of the at least one signal line 240 includes a first sub-signal portion 241a located in the first non-bending region 22a and a second sub-signal portion 241b located in the second non-bending region 22b. The first sub-signal portion 241a and the second sub-signal portion 241b are spaced apart from each other, and a distance D between the first sub-signal portion 241a and the second sub-signal portion 241b along a first direction (e.g., a Y-axis direction) ₁ Not less than the width D of the bending region 21 in the first direction (e.g., Y-axis direction) ₂ . For example, referring to fig. 7, 8 and 15, a distance D between the first sub-signal part 241a and the second sub-signal part 241b ₁ Is equal to the width D of the bending zone 21 in a first direction (e.g., Y-axis direction) ₂ Therefore, the part of the signal line 240 located in the bending area 21 is guaranteed to be in a single-layer metal routing structure, and the risk of cracks or fractures of the part of the signal line 240 located in the bending area 21 is reduced. For another example, referring to fig. 9, a distance D between the first sub-signal portion 241a and the second sub-signal portion 241b ₁ Is greater than the width D of the bending zone 21 along the first direction (e.g., Y-axis direction) ₂ Therefore, the portion of the signal line 240 located in the bending region 21 is ensured to be a single-layer metal routing structure, and meanwhile, the portion of the second sub-signal line 242 located in the bending region 21 is prevented from generating a new section difference, so that the portion of the second sub-signal line 242 located in the bending region 21 is reduced from generating layering or layeringThe risk of breakage.

The first sub-signal line 241 and the second sub-signal line 242 may be connected in parallel, and the connection mode of the first sub-signal line 241 and the second sub-signal line 242 is not particularly limited in the present application. Next, the connection mode of the first sub-signal line 241 and the second sub-signal line 242 will be described by way of example with reference to several specific embodiments.

For example, in the touch panel 200 provided in at least one embodiment of the present application, referring to fig. 7 to 9 and 15, for example, at least one first through hole 1 is provided on the insulating layer 220. The first sub-signal line 241 is interconnected with the second sub-signal line 242 through the first via 1. In this way, the first sub-signal line 241 is connected in parallel with the second sub-signal line 242 through the first via 1, so that the impedance of the signal line 240 is reduced, and thus the requirement on the driving voltage is reduced and the power consumption of the touch panel 200 is reduced.

For another example, in the touch panel 200 provided in at least one embodiment of the present application, referring to fig. 8, for example, the first sub-signal line 241 is provided with a first groove 2 corresponding to the first via 1, and the first sub-signal line 241 is connected to the second sub-signal line 242 through the first via 1 and the first groove 2. In this way, the first groove 2 is additionally arranged on the basis of the first through hole 1, so that the first sub-signal line 241 is connected in parallel with the second sub-signal line 242 through the first through hole 1 and the first groove 2, and the contact area of the connection position of the first sub-signal line 241 and the second sub-signal line 242 is increased by using the first groove 2, so that the reliability of the parallel connection of the first sub-signal line 241 and the second sub-signal line 242 is higher.

The first touch electrode 231 may be formed by connecting a plurality of first touch electrode blocks 231a together through a conductive bridge 233, or may be formed by a whole touch electrode. Next, the structural design of the first touch electrode 231 will be exemplified with reference to several embodiments.

In the touch panel 200 according to at least one embodiment of the present disclosure, referring to fig. 5, 6, 13 and 14, the first touch electrode 231 includes a plurality of first touch electrode blocks 231a arranged in parallel along a second direction (for example, an X-axis direction). The touch electrode layer 230 further includes a plurality of second touch electrodes 232 arranged in parallel along a second direction (e.g., an X-axis direction), and a plurality of conductive bridges 233 located on a side of the substrate 210 facing the first touch electrodes 231 and the second touch electrodes 232. Each of the first touch electrodes 231 and each of the second touch electrodes 232 cross each other to form a plurality of touch units S2.

It should be noted that the first touch electrode 231 and the second touch electrode 232 may be on the same layer, or may be on different layers. For the plurality of second touch electrodes 232, signal lines may also be correspondingly disposed according to actual requirements. One of the first touch electrode 231 and the second touch electrode 232 may be a sensing electrode (Receive, RX). The other of the first touch electrode 231 and the second touch electrode 232 may be a transmission electrode (TX). The boundary of the touch unit S2 may be divided according to the sensing area of the touch capacitor. The area where the sensing electrode and the transmitting electrode intersect can form a touch capacitor. The scanning signal is applied to the transmitting electrode, if the finger of the user is close to the intersection point, a parasitic capacitor can be formed between the sensing electrode or the transmitting electrode and the finger of the user, the parasitic capacitor can cause the voltage of the touch capacitor to float, namely, the capacitance value of the touch capacitor formed at the intersection point of the sensing electrode and the transmitting electrode can be changed, the position of the touch capacitor with the changed capacitance value can be determined by detecting the sensing electrode with the changed voltage, and the touch position can be located, so that touch is realized.

In addition, the conductive bridge 233 may be located on a side of the insulating layer 220 facing the substrate 210, or on a side of the insulating layer 220 away from the substrate 210, as long as the two adjacent first touch electrode blocks 231a can be connected, and on this basis, the installation position of the conductive bridge 233 is not specifically limited in this embodiment of the application. The structural design of the conductive bridge 233 is illustrated in the following embodiments.

For example, in some embodiments, referring to fig. 6, the insulating layer 220 covers a surface of the conductive bridge 233 on a side facing away from the substrate 210 and is provided with a plurality of second through holes 3. The conductive bridge 233 connects the two adjacent first touch electrode blocks 231a through at least two second through holes 3. In this way, the conductive bridge 233 is located on one side of the insulating layer 220 facing the substrate 210, and the conductive bridge 233 is used to conduct the two adjacent first touch electrode blocks 231a. Further, the conductive bridge 233 is in the same layer and/or the same material as the first sub-signal line 241. Thus, if the conductive bridge 233 is on the same layer as the first sub-signal line 241, the conductive bridge 233 and the first sub-signal line 241 can be located on the same surface of the substrate 210. If the conductive bridge 233 and the first sub-signal line 241 are made of the same material, the first sub-signal line 241 is formed by using the material of the conductive bridge 233, and thus, additional new materials are not required, which is beneficial to reducing the cost. If the conductive bridge 233 and the first sub-signal line 241 are in the same layer and made of the same material, the first sub-signal line 241 can be formed simultaneously when the conductive bridge 233 of the touch electrode layer 230 is manufactured, thereby simplifying the manufacturing process of the touch panel 200 and reducing the cost.

For another example, in other embodiments, referring to fig. 14, the insulating layer 220 covers surfaces of the first touch electrode 231 and the second touch electrode 232 on a side facing away from the substrate 210 and is provided with a plurality of second through holes 3. The conductive bridge 233 connects the adjacent two first touch electrode blocks 231a through at least two second through holes 3. In this way, the conductive bridge 233 is located on a side of the insulating layer 220 away from the substrate 210, and the conductive bridge 233 is used to conduct the two adjacent first touch electrode blocks 231a. Further, the conductive bridge 233 is in the same layer and/or material as the first sub-signal line 241. Thus, if the conductive bridge 233 is on the same layer as the first sub-signal line 241, the conductive bridge 233 and the first sub-signal line 241 can be located on the same surface of the insulating layer 220. If the conductive bridge 233 and the first sub-signal line 241 are made of the same material, the first sub-signal line 241 is formed by using the material of the conductive bridge 233, and thus, additional new materials are not required, which is beneficial to reducing the cost. If the conductive bridge 233 and the first sub-signal line 241 are the same layer and made of the same material, the first sub-signal line 241 can be formed simultaneously when the conductive bridge 233 of the touch electrode layer 230 is manufactured, thereby simplifying the manufacturing process of the touch panel 200 and reducing the cost.

It should be noted that there may be two second through holes 3 corresponding to each conductive bridge 233, or there may be three or more second through holes 3 corresponding to each conductive bridge 233.

In the touch panel 200 according to at least one embodiment of the present disclosure, the second sub-signal line 242 is formed on the same layer and/or material as at least one of the first touch electrode 231 and the second touch electrode 232. In this way, if the second sub-signal line 242 and at least one of the first touch electrode 231 and the second touch electrode 232 are in the same layer, the second sub-signal line 242 and at least one of the first touch electrode 231 and the second touch electrode 232 may be located on the same surface. If the second sub-signal line 242 and at least one of the first touch electrode 231 and the second touch electrode 232 are made of the same material, the second sub-signal line 242 may be formed by using the material of the first touch electrode 231 or the second touch electrode 232 without adding other new materials, which is beneficial to reducing the cost. If the second sub-signal line 242 and at least one of the first touch electrode 231 and the second touch electrode 232 are in the same layer and made of the same material, the second sub-signal line 242 can be formed simultaneously when the first touch electrode 231 and/or the second touch electrode 232 of the touch electrode layer 230 are/is manufactured, so that the manufacturing process of the touch panel 200 is simplified, and the cost is reduced.

The bending region 21 of the touch panel 200 may include a first touch functional region 21-1 and a first frame region 21-2 located at the periphery of the first touch functional region 21-1. When the touch panel 200 is bent, the bending stress is released from the first touch functional area 21-1 to the first frame area 21-2, such that the closer the linear distance between the signal line 240 and the first touch functional area 21-1 is along the X-axis direction, the greater the bending stress applied to the signal line 240, for example, as the linear distance between the signal lines 240 and the first touch functional area 21-1 is from near to far, the bending stress applied to the signal lines 240 tends to decrease.

It should be noted that the number of the first frame areas 21-2 may be one or more.

In order to reduce the influence caused by the different bending stresses applied to the portions of the different signal lines located in the bending region 21, in the touch panel 200 provided in at least one embodiment of the present application, for example, referring to fig. 10 to 12, along the second direction (for example, the X-axis direction), as the linear distance between the at least two signal lines 240 and the first touch functional region 21-1 is from near to far, the width of at least one portion of the at least two signal lines 240 located in the bending region 21 is gradually reduced. For example, the bending region 21 may be divided into a plurality of parallel sub-bending regions (e.g., including a sub-bending region 21a and a sub-bending region 21 b) along a direction parallel to the second direction (e.g., the X-axis direction). In some embodiments, for example, referring to fig. 10, assuming that four signal lines 240 are located in the bending region 21, and the widths of the portions of two signal lines 240 located in the bending region 21 are the same among the four signal lines 240, in the sub-bending region 21a, as the straight-line distance between the two signal lines 240 and the first touch functional region 21-1 is from near to far, the widths of the portions of the two signal lines 240 located in the sub-bending region 21a gradually decrease; in the sub-bending region 21b, as the linear distance between the three signal lines 240 and the first touch functional region 21-1 is from near to far, the widths of the portions of the three signal lines 240 located in the sub-bending region 21b gradually decrease. For another example, in other embodiments, referring to fig. 11, for example, the widths of the portions of the four signal lines 240 located in the bending region 21 are different, and in the sub-bending region 21a, as the linear distance between the three signal lines and the first touch functional region 21-1 is from near to far, the widths of the portions of the three signal lines located in the sub-bending region 21a gradually decrease; in the sub-bending region 21b, as the straight distances between the four signal lines and the first touch functional region 21-1 are from near to far, the widths of the portions of the four signal lines located in the sub-bending region 21b are gradually reduced. Thus, by adjusting the widths of the at least two signal lines 240, the performance of the bending stress resistance of the signal line 240 closer to the first touch functional region 21-1 in the at least two signal lines 240 is better, so as to avoid or improve the influence caused by different bending stresses on the portions of the different signal lines 240 located in the bending region 21.

The at least two signal lines 240 may be any two or more of the plurality of signal lines 240 as long as the signal lines pass through the bending region 21.

In some embodiments, for example, referring to fig. 10 and 11, the width of the portion of any one signal line 240 located in the bending region may be uniform; in other embodiments, referring to fig. 12, for example, the widths of the portions of the signal lines 240 located in the bending regions, which are farthest from the straight line between the first touch functional regions 21-1, in the plurality of signal lines 240 may be different, and the embodiment of the present invention does not specifically limit whether the widths of the portions of any signal line 240 located in the bending regions are different.

Since the width of at least one portion of the at least two signal lines 240 located in the bending region 21 is gradually decreased, the impedance of at least one portion of the at least two signal lines 240 located in the bending region 21 is sequentially decreased with the decrease of the width, which may cause the impedance of the at least two signal lines 240 to be mismatched.

To avoid impedance mismatch of the at least two signal lines 240, for example, in the touch panel 200 provided in at least one embodiment of the present application, referring to fig. 11, the non-bending region 22 includes a second touch-enabled region 22-1 and a second frame region 22-2 located at the periphery of the second touch-enabled region 22-1. In the second direction (e.g., the X-axis direction), as the distance between the at least two signal lines 240 and the second touch functional region 22-1 is from near to far, the width of at least one portion of the at least two signal lines 240 located in the non-bending region 22 gradually increases. In this way, in the second direction (for example, the X-axis direction), as the distance between the at least two signal lines 240 and the second touch functional region 22-1 is from near to far, the width of at least one portion of the at least two signal lines 240 located in the non-bending region 22 is gradually increased, so that the impedance of at least one portion of the at least two signal lines 240 located in the non-bending region 22 is sequentially increased along with the increase of the width, and the impedance mismatch of the at least two signal lines 240 is avoided or improved.

It should be noted that the non-bending region 22 may be any one or more of the first non-bending region 22a and the second non-bending region 22b.

In some embodiments, in the second direction (e.g., the X-axis direction), as the distance between the at least two signal lines 240 and the second touch functional region 22-1 is from near to far, the width of all portions of the at least two signal lines 240 located in the non-bending region 22 gradually increases. In other embodiments, along the second direction (e.g., the X-axis direction), as the distance between the at least two signal lines 240 and the second touch functional region 22-1 is from close to far, the width of a small portion of all portions of the at least two signal lines 240 located in the non-bending region 22 gradually increases.

The two portions of each signal line 240 with different widths may be in direct transition, i.e., directly transition from one width to another, or may be in gradual transition, i.e., gradually transition from one width to another.

At least one embodiment of the present application further provides a touch display device 300, and exemplarily, referring to fig. 16, the touch display device 300 includes a display panel 310 and the touch panel 200 in any of the embodiments of the present application. The touch panel 200 is located on the display side of the display panel 310.

For example, in at least one embodiment of the present application, the display panel 310 may serve as a substrate for carrying the touch panel 200, such as an insulating layer, a touch electrode layer, and a plurality of signal lines. For example, the touch panel 200 may be a touch panel in the form of TOE (touch encapsulation), that is, a touch electrode layer in the TOE touch panel, such as a conductive bridge, a first touch electrode, a second touch electrode, and the like, is directly formed on an encapsulation layer of the display panel 310, which simplifies the manufacturing process of the entire touch display device 300 compared to the attachment method and is beneficial to the light and thin design of the touch display device 300.

For example, in the touch display device 300 provided in some embodiments of the present application, the display panel 310 includes a display area and a plurality of pixels located in the display area, and each pixel includes a plurality of sub-pixels and a spacing area located between the sub-pixels. For example, in the case where the first touch electrode, the second touch electrode, and the conductive bridge are arranged in a mesh structure, an orthogonal projection of mesh lines of the mesh structure on the display panel is located within the spacing region of the sub-pixels. Therefore, the grid structure can not block the emergent light of the sub-pixels, the light-emitting rate of the display panel is improved, the display brightness is improved, and the display effect is improved.

For example, in the touch display device 300 provided in at least one embodiment of the present application, a light splitting element (e.g., a light splitting grating) may be further disposed on the touch side (display side) of the touch panel 200, so that the touch display device 300 may have a three-dimensional display function.

For example, the touch display device 300 in the embodiment of the present application may be any electronic product or component with a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, and a navigator.

It should be noted that, for clarity, not all structures of the touch display device 300 are described. In order to realize the necessary functions of the touch display device 300, those skilled in the art may set other structures according to the specific application scenario.

It should be noted that the combination of the features in the present application is not limited to the combination described in the claims of the present application or the combination described in the specific embodiments, and all the features described in the present application may be freely combined or combined in any manner unless contradicted by each other.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modifications, equivalents and the like that are within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. A touch panel comprises a bending area and at least one non-bending area, and further comprises a substrate, an insulating layer, a touch electrode layer and a plurality of signal lines, wherein the insulating layer, the touch electrode layer and the signal lines are arranged on the same side of the substrate,

the touch electrode layer comprises a plurality of first touch electrodes arranged in parallel along a first direction,

the plurality of signal lines are in one-to-one correspondence with the plurality of first touch electrodes and are arranged in parallel along a second direction intersecting with the first direction, each signal line comprises a first sub-signal line and a second sub-signal line which are connected in parallel, the first sub-signal line is located in the at least one non-bending area, the second sub-signal line is located in the bending area and the at least one non-bending area simultaneously, and the second sub-signal line and the first touch electrodes are located on the surface of the same side of the insulating layer and are connected with each other.

2. The touch panel of claim 1,

the at least one non-bending region comprises a first non-bending region and a second non-bending region which are positioned at two opposite sides of the bending region, the first sub-signal line in the at least one signal line comprises a first sub-signal part positioned in the first non-bending region and a second sub-signal part positioned in the second non-bending region,

the first sub-signal portion and the second sub-signal portion are arranged at intervals, and the distance between the first sub-signal portion and the second sub-signal portion along the first direction is not smaller than the width of the bending area along the first direction.

3. The touch panel of claim 1,

the insulating layer is provided with at least one first through hole, and the first sub signal line is connected with the second sub signal line through the first through hole.

4. The touch panel of claim 3,

the first sub-signal line is provided with a first groove corresponding to the first through hole, and the first sub-signal line is connected with the second sub-signal line through the first through hole and the first groove.

5. The touch panel of claim 1,

the first touch electrode comprises a plurality of first touch electrode blocks which are arranged in parallel along the second direction,

the touch electrode layer further comprises a plurality of second touch electrodes arranged along the second direction, and a plurality of conductive bridges positioned on one side of the substrate facing the first touch electrodes and the second touch electrodes, wherein each first touch electrode and each second touch electrode are crossed with each other to form a plurality of touch units,

the insulating layer covers the surface of one side of the conductive bridge, which is far away from the substrate, and is provided with a plurality of second through holes, the conductive bridge is connected with two adjacent first touch electrode blocks through at least two second through holes,

preferably, the conductive bridge and the first sub signal line are in the same layer and/or the same material.

6. The touch panel of claim 1,

the insulating layer covers the surfaces of the first touch electrode and the second touch electrode, which are far away from the substrate, and is provided with a plurality of second through holes, the conductive bridge is connected with two adjacent first touch electrode blocks through at least two second through holes,

7. The touch panel according to any one of claims 1 to 6,

the second sub-signal line and at least one of the first touch electrode and the second touch electrode are made of the same layer and/or the same material.

8. The touch panel according to any one of claims 1 to 6,

the bending area comprises a first touch functional area and a first frame area located on the periphery of the first touch functional area, and along the second direction, as the linear distance between at least two signal lines and the first touch functional area is from near to far, the width of at least one part of the at least two signal lines located in the bending area is gradually reduced.

9. The touch panel of claim 8,

the non-bending area comprises a second touch functional area and a second frame area located on the periphery of the second touch functional area, and along the second direction, as the linear distance between at least two signal lines and the second touch functional area is from near to far, the width of at least one part of the at least two signal lines located in the non-bending area is gradually increased.

10. A touch display device, comprising:

a display panel;

the touch panel of any one of claims 1-9, the touch panel being located on a display side of the display panel.