TWI630524B - Touch display device - Google Patents

Abstract

A touch display device includes a display panel and a touch module. The touch module includes a flexible substrate, a plurality of touch electrodes, and a plurality of wires. The touch electrodes and wires are disposed on a flexible substrate. The lead is electrically connected to the touch electrode. The flexible substrate and the lead are bent from the upper surface of the display panel to the side surface of the display panel. The lead has a bending start line and a bending end line. The range between the bending end lines is defined as a bending area, where at least one wire has a first section, a second section, and a third section located between the first and second sections. The section covers the bending area. The first section has a first width, the second section has a second width larger than the first width, and the third section gradually changes its width from the first width to the second width.

Description

Touch display device

This disclosure relates to a touch display device.

With the vigorous development of electronic technology, current product trends are constantly moving towards the technology of integrating touch modules into touch display devices to form touch display panels. A common touch display device is manufactured after the touch module is separated from the display panel, and then the touch module is attached to the display panel.

The touch module includes a plurality of touch electrodes, and leads corresponding to the sensing electrodes. In order to meet the requirements of a larger visible picture, and a thin, light, simple, slim border design, the space for the touch module to configure the wires will be limited. In recent years, the touch module uses a flexible substrate, and the purpose of saving space is achieved by bending the substrate to the side of the display panel. However, in the process of bending, it is easy to break the circuit, thereby affecting the service life of the electronic product.

One embodiment of the present disclosure is a touch display device including a display panel and a touch module. The touch module includes a flexible substrate, a plurality of touch electrodes, and a plurality of wires. The flexible substrate is disposed on the display panel. touch The control electrode is disposed on a flexible substrate. The conductive wire is arranged on the flexible substrate and is electrically connected to the touch electrodes. The flexible substrate and the conductive wire are bent from the upper surface of the display panel to the side surface of the display panel. The starting point of the conductive wire is defined as the bending start The start line, the end point of the wire bend is defined as the bend end line, and the range between the bend start line and the bend end line is defined as the bend area. At least one of the wires has a first section and a second section. And a third section located between the first section and the second section, the second section covers the bending area, the first section has a first width, and the second section has a second width greater than the first width , The width of the third section changes from the first width to the second width.

This disclosure bends the substrate and wires of the touch module to the side and the lower surface of the display panel. The conductor is designed with a larger width in the bending area to increase the structural strength of the conductor and avoid breakage during bending. In addition, the wire is designed with a tapered width, which can also increase the strength of the overall structure.

In some embodiments of the present disclosure, a protective layer may be further disposed on the wire. The width of the protective layer is greater than the width of the wire, and the ductility of the protective layer is greater than the ductility of the wire. The protective layer at least covers the bent section of the wire, which can increase The strength of the overall structure, to avoid fracture when bending.

In some embodiments of the present disclosure, it is possible to design the wire to have a hollow portion in the bent section to increase the elasticity of the wire. On the other hand, the disclosure can design the wire to have a curved wave shape in the bending section, and can also increase the elasticity of the wire to avoid breaking during bending.

10‧‧‧Touch display device

20‧‧‧Touch Module

Districts 20A, 20B, 20C‧‧‧

30‧‧‧Display Panel

40‧‧‧printed circuit board

101‧‧‧ substrate

111‧‧‧touch electrode

121, 126‧‧‧ Lead

122, 123, 124, 125‧‧‧ hollowed out parts

141‧‧‧protective layer

121A, 121B, 121C, 121D, 121E‧‧‧ sections

210‧‧‧touch area

220‧‧‧Peripheral area

301, 302, 303, 304‧‧‧ surface

1211, 1212‧‧‧Edge

1213‧‧‧ crest

1214‧‧‧ Valley

A, A’‧‧‧ area

B-B‧‧‧line

d ₁ , d ₂ , W ₂₂ , W ₃₃ ‧‧‧ distance

G ₁ ‧‧‧ gradient starting line

G ₂ ‧‧‧ Gradient Termination Line

L ₁ , L ₂ ‧‧‧ buffer line

P ₁ ‧‧‧Bend area

P ₂ ‧‧‧ buffer zone

S ₁ , S ₂ ‧‧‧ Bend line

t‧‧‧thickness

W ₁ , W ₂ , W ₃ , W ₄ , W ₅ ‧‧‧ width

Read the following detailed description and the corresponding drawings to understand the various aspects of this disclosure. It should be noted that according to standard practice in the industry, multiple features are not drawn to scale. In fact, the dimensions of multiple features can be arbitrarily increased or decreased to facilitate clarity of discussion.

FIG. 1A is a schematic top view of a touch display device according to some embodiments of the disclosure.

Figure 1B is a cross-sectional view taken along line B-B of Figure 1A.

Figure 2 is a partially enlarged view of Figure 1B.

FIG. 3A and FIG. 3B are schematic top views of wires of a touch display device according to some embodiments of the disclosure.

FIG. 4A is a schematic top view of a touch display device according to some embodiments of the disclosure.

Fig. 4B is a sectional view taken along line B-B of Fig. 4A.

FIG. 5 is a schematic top view of a lead of a touch display device according to some embodiments of the disclosure.

6A to 6D are schematic top views of the wires of the touch display device according to some embodiments of the disclosure.

7A to 7C are schematic top views of the wires of a touch display device according to some embodiments of the disclosure.

8A to 8C are schematic top views of a touch display device according to some embodiments of the disclosure.

The following disclosure provides many different embodiments or examples for practical purposes. Implement different characteristics of the main content provided in this case. The components and configurations of a specific example are described below to simplify this disclosure. Of course, this example is only illustrative and is not intended to be limiting. For example, the following description "the first feature is formed on or above the second feature", in the embodiment may include the first feature and the second feature in direct contact, and may also be included in the first feature and the second feature Additional features are formed between the first feature and the second feature without direct contact. In addition, the disclosure may reuse component symbols and / or letters in various examples. The purpose of this repetition is to simplify and clarify, and does not itself define the relationship between the embodiments and / or configurations discussed.

In addition, spatially relative terms such as "beneath", "below", "lower", "above", "upper", etc. are used herein to simplify the description To describe the relationship between one element or feature and another element or feature as illustrated in the drawings. In addition to the orientation depicted, spatial relative terms also include the different orientations of an element in use or operation. This device can be oriented in other ways (rotated 90 degrees or at other orientations), and the spatially relative descriptors used in this case can be interpreted accordingly.

FIG. 1A is a top view of a touch display device according to some embodiments of the disclosure. Figure 1B is a cross-sectional view taken along line B-B of Figure 1A.

Please refer to FIG. 1A and FIG. 1B together. The touch display device 10 includes a touch module 20, a display panel 30, and a printed circuit board 40 connected to each other. For ease of viewing, the display panel 30 is not shown in FIG. 1A. In addition, the touch module 20 in FIG. 1A is displayed in a plan view. The actual appearance of the touch module 20 disclosed in this disclosure is as shown in FIG. 1B. Set, together first described.

The touch module 20 includes a substrate 101, a plurality of touch electrodes 111, and a plurality of wires 121. The substrate 101 has a touch area 210 and a peripheral area 220. The peripheral area 220 is disposed on the periphery of the touch area 210. That is, the peripheral region 220 substantially surrounds the entire touch region 210.

The plurality of touch electrodes 111 are disposed in the touch area 210 of the substrate 101 and are used to sense the force, position, etc. of the touch. The plurality of wires 121 are disposed in the peripheral area 220. One end of the lead 121 extends into the touch area 210 and is electrically connected to the touch electrode 111 in the touch area 210, and the other end of the lead 121 is electrically connected to the printed circuit board 40. Since the wires 121 are generally disposed in the peripheral area 220. Therefore, the peripheral area 220 can also be viewed as a wiring area on the substrate 101. In some embodiments, the printed circuit board 40 may be a flexible printed circuit (FPC). Only one printed circuit board 40 is shown in FIG. 1A, but the disclosure is not limited thereto. In other embodiments, there may be multiple printed circuit boards.

The material of the touch electrode 111 located in the touch area 210 may be a transparent material, such as indium tin oxide (ITO), thereby improving light transmittance. In some embodiments, the formation method of the touch electrode 111 may be, for example, an electrode layer is formed in advance on the substrate 101 by a deposition process, and then photolithography is used according to a desired circuit layout. The touch electrode 111 is obtained by patterning the electrode layer. The deposition process may be Plasma Enhanced Chemical Vapor Deposition (PECVD), or other suitable deposition processes. It should be understood that the touch electrodes 111 shown here are only schematic and are not intended to limit the present disclosure. In some embodiments, the touch electrode 111 may be a single layer structure, such as a single layer Indium tin oxide (single ITO; SITO). For example, diamond electrodes in the X and Y directions are staggered. In some other embodiments, the touch electrode 111 may have a double-layer structure, such as a double-layer indium tin oxide (DITO). For example, the electrodes in the X and Y directions are formed on different layers (such as the upper and lower surfaces of the substrate).

On the other hand, the material of the wire 121 in the peripheral region 220 may be silver (Ag), copper (Cu), aluminum (Al), gold (Au), nickel (Ni), molybdenum (Mo), indium (In) , Tin (Sn) or titanium (Ti). Similarly, the method for forming the conductive line 121 may be, for example, forming a conductive layer on the substrate 101 by a deposition process, and then patterning the conductive layer by photolithography according to a desired circuit layout. Conductor 121. In other embodiments, a decoration layer may be formed on the conductive line 121 to shield the conductive line 121 to prevent users from seeing the conductive line 121. The decoration layer is a film layer having a shielding function, and the material thereof can be photoresist, ink, diamond-like carbon, ceramic, or a combination of the above materials.

The substrate 101 is a flexible substrate. In some embodiments, the material of the substrate 101 is, for example, Polyethylene Terephthalate (PET), Cyclo olefin polymer (COP), Polyimide (PI) Polymethyl methacrylate (PMMA).

Because the substrate 101 of the touch module 20 is flexible. Therefore, in some embodiments, a part of the peripheral region 220 of the touch module 20 can be bent down to the side or bottom surface of the display panel 30, thereby achieving the goal of a narrow frame. In some embodiments, the touch module 20 and the display panel 30 may be bonded through an optical clear adhesive (OCA). In addition, the printed circuit board 40 may be electrically connected to the display panel 30 or connected to an external circuit. The exposure does not limit the connection method of the printed circuit board 40.

From a more subtle point of view, the touch module 20 can be divided into a first region 20A, a second region 20B, and a third region 20C. The range of the first region 20A generally corresponds to the display region 210 on the substrate 101. The portion of the first region 20A extending to both sides is the second region 20B, and the second region 20B extends outward to the third region 20C. In FIG. 1B, the touch module 20 is bent so that the first region 20A covers the upper surface 301 of the display panel 30, and the second region 20B connected to the first region 20A is disposed on the side surfaces 302 and 303 of the display panel 30. The third region 20C connected to the second region 20B is disposed on the lower surface 304 of the display panel 30. That is, the touch module 20 substantially covers the display panel 30 through bending. In some other embodiments, the touch module 20 only covers the upper surface 301 and the side surfaces 302 and 303 of the display panel 30. In other words, the touch module 20 is only divided into the first region 20A and the second region 20B, and does not have the third region 20C. The bending angle of the touch module 20 is substantially determined by the shape of the display panel 30. For example, in FIG. 1B, the angle between the upper surface 301 and the side surface 302 of the display panel 30 is substantially 90 degrees (that is, vertical), so the bending angle of the touch module 20 is substantially 90 degrees. In other embodiments, the included angle between the upper surface 301 and the side surface 302 of the display panel 30 may be about 45 degrees to about 135 degrees.

The display panel 30 may be a non-emissive display panel, a self-emissive display panel, or a combination thereof. In some embodiments, the self-luminous row display panel includes an organic light-emitting display panel, an electroluminescent display panel, and the like. In some embodiments, the non-emissive line display panel includes a liquid crystal display panel, an electrophoretic display panel, an electrowetting display panel, and the like. In addition, the display panel 30 may be a flexible display panel or a rigid display panel, and the disclosure is not limited thereto.

Figure 2 is a partially enlarged view of Figure 1B. Since the touch module 20 is bent from the upper surface 301 to the side surface 302 of the display panel 30, even the wire 121 carrying the touch module 20 is also bent from the upper surface 301 to the side surface 302 of the display panel 30. Here, the starting point of the bending of the conducting wire 121 is represented by the bending line S ₁ , and the ending point of the bending of the conducting wire 121 is represented by the bending line S ₂ , and the range between the bending lines S ₁ and S ₂ is defined as the bending Area P ₁ . The bending line S ₁ may also be referred to as a bending start line, and the bending line S ₂ may also be referred to as a bending end line. The bending region P ₁ is substantially located at a boundary between the upper surface 301 and the side surface 302 of the display panel 30. On the other hand, here, the line segments of the bending lines S ₁ and S ₂ respectively extending outwardly by a distance d _{1 are} defined as the buffer lines L ₁ and L ₂ . Here, the range between the buffer line L ₁ and the bending line S ₁ and the range between the buffer line L ₂ and the bending line S ₂ are defined as the buffer area P ₂ . In other words, the buffer area P ₂ is substantially a range in which both sides of the bending area P ₁ respectively extend outward by a distance d ₁ . In some embodiments, the distance d ₁ is about 0.5 mm, but the disclosure is not limited thereto.

FIG. 3A and FIG. 3B are schematic top views of wires of a touch module according to some embodiments of the disclosure. FIG. 3A is a partial enlarged view of the conductive line 121 in the area A in FIG. 1A. During the bending process of the lead wire 121, the lead wire 121 may have a possibility of being broken due to the fragile structure, the bending force, and the angle being too large. Therefore, in some embodiments of the present disclosure, the conductive wire 121 has a variable width.

Please refer to FIG. 2 and FIG. 3A together. The wire 121 can be divided into interconnected sections 121A, 121B, 121C, 121D, and 121E. The section 121D is located between the sections 121A and 121B, and the section 121E is located between the sections 121B and 121C. The section 121A is substantially located on the upper surface 301 of the display panel 30, and the section 121C is substantially located on the side surface of the display panel 30 302. Generally speaking, the sections 121A and 121C can be regarded as the unbent portions of the wires 121. In some embodiments, the sections 121D and 121E are also essentially unbent portions of the wire 121, and the disclosure is not limited thereto.

The segment 121B is substantially located (or covered) in the bending region P ₁ , so the segment 121B can be regarded as a bent portion of the wire 121. In some embodiments, the range of the segment 121B is slightly larger than the bending region P _{1 of the} conductive line 121. In other words, the bend lines S ₁ and S ₂ defined in FIG. ₂ substantially fall within the section 121B of the wire 121.

The sections 121A and 121C have widths W ₁ and W ₃ , and the section 121B has a width W ₂ , and the width W _{2 is} larger than the widths W ₁ and W ₃ . In some embodiments, the width W ₂ is an increase of the widths W ₁ and W ₃ from about 30% to about 500%. In other words, the width W ₂ and the width W ₁ can satisfy the relationship: (W ₂ -W ₁ ) / W ₁ = 30% -500%. In some embodiments, the width W ₁ is about 10-50 μm. Similarly, the width W ₂ and the width W ₃ also have similar characteristics, which will not be described again below. Since the width W _{2 of the} section 121B belongs to the bent portion of the wire 121, designing a larger width W ₂ can increase the structural strength of the wire 121.

The sections 121D and 121E have a gradual width, wherein the width of the section 121D is gradually changed from the width W ₁ to the width W ₂ , and the width of the section 121E is gradually changed from the width W ₂ to the width W ₁ . Therefore, the sections 121D and 121E may also be referred to as gradual sections. In this embodiment, the widths of the segments 121D and 121E are linearly changed.

In some embodiments, the position of the buffer line L ₁ in FIG. 2 can be located at the center of the section 121D, and the positions at a distance of d ₂ on both sides of the buffer line L ₁ are defined as the gradient starting line G ₁ and the gradient. Termination line G ₂ . Therefore, the range of the segment 121D substantially corresponds to the range between the gradation start line G ₁ and the gradation end line G ₂ . In some embodiments, the distance d ₂ ranges from about 50um to 300um. From another perspective, since the buffer line L _{1 is} positioned at the center of the section 121D, at least half of the section 121D covers the buffer zone P ₂ .

As mentioned above, the range of the section 121B is slightly larger than the bend region P _{1 of the} wire 121 (the distance between the bend lines S ₁ and S ₂ ), so that the section 121B having a larger width W ₂ can cover the entire area Bending area P ₁ . From another perspective, the lines of termination gradient G ₂ and _the distance between the line buffer L d ₂ is substantially less than the bending lines S ₁ and the distance between _the line buffer L d _1. This configuration can ensure that the width of the wire 121 is changed from the width W ₁ to the width W ₂ before the wire 121 starts to bend (that is, at the bend line S ₁ ).

In addition, although the conducting wire 121 starts to bend from the bending line S ₁ , the conducting wire 121 near the bending place still receives some bending tension, which may cause the conducting wire to be damaged. Therefore, the design of this disclosure has a gradual width at the periphery of the buffer line L ₁ (ie, the section 121D), which can also increase the structural strength of the wire. From another perspective, the design of the present disclosure can ensure that the width of the conductive line 121 in the buffer area P ₂ (the range between the buffer line L ₁ and the bend line S ₁ ) has begun to increase. In addition, the conductive wire 121 has a gradual width (non-abrupt width), which can also increase the strength of the structure. For example, if the section 121D is omitted, the section 121A and the section 121B are directly connected, the width of the wire 121 is changed from the width W ₁ to the width W ₂ directly, and the connected part is suddenly changed because of the width. There is also the risk of easy breakage. Similarly, the sections 121E and 121D have similar structures, which will not be described again below.

The structural configuration of FIG. 3B is similar to that of FIG. 3A. The difference from FIG. 3A is that the widths of the sections 121D and 121E of the wire 121 in FIG. 3B Stepwise change.

FIG. 4A is a schematic top view of a touch display device according to some embodiments of the disclosure. Fig. 4B is a sectional view taken along line B-B of Fig. 4A. The difference from FIGS. 1A and 1B is that the touch module 20 in the touch display device 10 further includes a protective layer 141. The protective layer 141 substantially covers the conductive wire 121 to increase the structural strength of the conductive wire 121 when it is bent. The protective layer 141 is bent from the upper surface 301 of the display panel 30 to the side surface 302 and the lower surface 304 of the display panel 30. In practical applications, the range covered by the protective layer 141 may be adjusted according to the configuration status of the lead wires 121 (for example, the position of the bend).

In some embodiments, the material of the protective layer 141 may be a metal paste. In addition, as shown in FIG. 4B, since the protective layer 141 covers the conductive line 121, during the bending process, the protective layer 141 has a larger bending width than the conductive line 121. Therefore, the ductility of the material of the protective layer 141 is greater than that of the material of the lead 121. In some embodiments, the thickness t of the protective layer 141 ranges from about 3 μm to about 10 μm.

FIG. 5 is a schematic top view of the leads of the touch module according to some embodiments of the disclosure, and FIG. 5 is a partial enlarged view of the leads 121 in the area A ′ of FIG. 4A. The protective layer 141 has a width W _4, W ₄ wherein the width of at least greater than the width W ₁ and a width of the wire 121 within the bend region ₁ P ₂ W (width W ₁ and W ₂ Description of the Related Referring to Figure 3A). In some embodiments, the width W ₄ of the protective layer 141 ranges from about 100 μm to about 400 μm.

The area covered by the protective layer 141 must be at least greater than or equal to the sum of the bending area P ₁ and the buffer areas P ₂ on both sides. As mentioned above, although the wire 121 actually starts to bend in the bending area P ₁ , since the wire 121 near the part P ₁ of the bending area is still subject to partial bending tension, the protective layer 141 covers at least The buffer P ₂ ensures that the wire 121 is less likely to break. In this embodiment, the protective layer 141 completely covers the sections 121B (that is, the bent section) and the sections 121D and 121E (that is, the buffer section) of the wire 121, and partially covers the sections 121A and 121C (that is, the unbent section). Section). In other embodiments, the protective layer 141 completely covers the sections 121B of the conductive wires 121 and partially covers the sections 121D and 121E, but does not cover the sections 121A and 121C. It should be understood that although the protective layer 141 partially covers the sections 121D and 121E, its scope still needs to cover the buffer zone P ₂ .

6A to 6D are schematic top views of the wires of the touch display device according to some embodiments of the disclosure. Similar to FIGS. 3A and 3B, the lead 121 is also designed to have a larger width in the bending region P ₁ . However, the conducting wire 121 in the bending area P ₁ in FIGS. 6A to 6D has a hollow design, which can increase the elasticity of the conducting wire 121 and avoid breakage during bending. In addition, since the lead 121 has a hollow design, the width indicated in the bending region P ₁ is the total width of the lead 121 plus the hollow. In other words, according to FIG. 6A, the conductive line 121 has a first edge 1211 in the bending region, and a second edge 1212 farthest from the first edge 1211, and the first edge 1211 and the second edge The distance W ₂₂ between 1212 can be regarded as the total width of the lead 121 in the bending area P ₁ , wherein the distance W _{22 is} greater than the width W _{1 of the} unbent portion of the lead 121.

In FIG. 6A, the lead 121 has a plurality of hollow portions 122, wherein the extending direction of the hollow portions 122 is the same as the extending direction of the leads 121, and the arrangement direction of the hollow portions 122 is perpendicular to the extending direction of the leads 121.

In FIG. 6B, the lead 121 has a plurality of hollow portions 123, wherein the hollow portions 123 are triangular.

In FIG. 6C, the lead 121 has a plurality of hollow portions 124, and the hollow portions 123 are circular.

In FIG. 6D, the lead 121 has a plurality of hollow portions 125. The extending direction of the hollow portion 125 is perpendicular to the extending direction of the lead 121, and the arrangement direction of the hollow portions 125 is the same as the extending direction of the lead 121.

7A to 7C are schematic top views of the wires of a touch display device according to some embodiments of the disclosure. In some embodiments, the conductive line 121 may have a curved shape, such as a wave shape, in the bending region P ₁ . The conducting wire 121 has a width W ₅ in the bending region P ₁ , wherein the width W _{5 is} larger than the width W _{1 of the} unbent portion of the conducting wire 121. It should be understood that the width of the conductive line 121 may have a gradual section as shown in FIGS. 3A and 3B, which will not be described in detail below. In addition, the wire 121 has a wave peak 1213 and a wave valley 1214, wherein the distance between the wave peak 1213 and the wave valley 1214 is W ₃₃ , and the distance W ₃₃ (also referred to as a swing) is greater than the width W _{1 of the} unbent portion of the wire 121. In some embodiments, the distance W ₃₃ is increased by about 30% to about 500% for the width W ₁ . In other words, the distance W ₃₃ and the width W ₁ can satisfy the relationship: (W ₃₃ -W ₁ ) / W ₁ = 30% -500%.

In FIG. 7A, the state where the wire 121 is bent in the bending region is a triangular wave (also referred to as a sawtooth waveform).

In FIG. 7B, the state where the wire 121 is bent in the bending region is a square wave.

In FIG. 7C, the bent state of the lead 121 in the bending region is a sine wave.

It should be understood that although not shown, the structures in FIGS. 6A to 7C may also be provided with the protective layer 141 described in FIGS. 4A to 5, thereby increasing the strength of the overall structure. Similar descriptions will not be repeated later.

8A to 8C are schematic top views of a touch display device according to some embodiments of the disclosure.

Please refer to Figure 8A. Unlike the embodiment shown in FIG. 1A, the wires 121 and 126 are arranged in FIG. 8A. The leads 121 and 126 are connected to a touch electrode (not shown) in the touch area 210. The printed circuit board 40 is disposed below the touch area 210, and the conductive line 126 electrically connects the touch area 210 and the printed circuit board 40. On the other hand, the conductive line 121 is folded back from the first region 20A to the third region 20C, and then extended back to the first region 20A and is electrically connected to the printed circuit board 40.

Please refer to Figure 8B. FIG. 8B is different from the above embodiment in that one side (for example, the right side) of the touch area 210 in FIG. 8B is not provided with a bending area. In other words, the second region 20B and the third region 20C are arranged on only one side of the first region 20A. For example, this design can reduce the design that the side of the touch area 210 has a bend. In addition to achieving a narrow frame, it can also reduce the risk of loss in bending the wire.

Please refer to Figure 8C. Fig. 8C is similar to the embodiment of Fig. 1A. However, FIG. 8C is further provided with a conductive line 126 located below the touch area 210 and the printed circuit board 40, wherein the conductive line 126 electrically connects the touch area 210 and the printed circuit board 40.

It should be understood that the bent portion of the wire 121 in FIGS. 8A to 8C (for example, the junctions of the areas 20A, 20B, and 20C) may also have the characteristics described in FIGS. 1A to 7C. For simplicity, the details will not be repeated.

The disclosure provides a touch display device which bends a substrate and a lead of a touch module to a side surface and a lower surface of a display panel. The conductor is designed with a larger width in the bending area to increase the structural strength of the conductor and avoid bending fracture. In addition, the wire is designed with a tapered width, which can also increase the strength of the overall structure.

In some embodiments of the present disclosure, a protective layer may be further disposed on the wire. The width of the protective layer is greater than the width of the wire, and the ductility of the protective layer is greater than the ductility of the wire. The protective layer at least covers the bent section of the wire, which can increase The strength of the overall structure, to avoid fracture when bending.

In some embodiments of the present disclosure, it is possible to design the wire to have a hollow portion in the bent section to increase the elasticity of the wire. On the other hand, the disclosure can design the wire to have a curved wave shape in the bending section, and can also increase the elasticity of the wire to avoid breaking during bending.

The features of several embodiments are summarized above so that those skilled in the art can better understand the aspects of the present disclosure. Those skilled in the art should understand that they can easily use this disclosure as a basis to design or modify other processes and structures to achieve the same purpose and / or achieve the same advantages. Those skilled in the art should also understand that such equivalent structures do not depart from the spirit and scope of this disclosure, and that they can make various changes to this article without departing from the spirit and scope of this disclosure, Supersedes and changes.

Claims (9)

A touch display device including: a display panel; and a touch module including: a flexible substrate disposed on the display panel; a plurality of touch electrodes disposed on the flexible substrate; and A plurality of wires disposed on the flexible substrate and electrically connected to the touch electrodes, wherein the flexible substrate and the wires are bent from an upper surface of the display panel to one side of the display panel On the surface, the starting point of these wires is defined as a bending start line, and the ending point of these wires is defined as a bending end line. It is defined as a bent area, wherein at least one wire has a first section, a second section, and a third section located between the first section and the second section. The segment covers the bend region, and the range of the second segment is substantially larger than the range of the bend region. The first segment has a first width, and the second segment has a Two widths, the width of the third section gradually changes from the first width to the second width Degree. The touch display device according to claim 1, wherein the first width is W ₁ , the second width is W ₂ , and W ₁ and W ₂ satisfy the relationship: (W ₂ -W ₁ ) / W ₁ = 30% ~ 500%. The touch display device according to claim 1, wherein the width of the third section changes linearly. The touch display device according to claim 1, wherein a width of the third section changes in steps. The touch display device according to claim 1, wherein the bending area extends outward by a distance defined as a buffer area, and the third section partially covers the buffer area. The touch display device according to claim 5, wherein at least half of the third section covers the buffer area. The touch display device according to claim 1, further comprising a plurality of protective layers respectively covering the wires, wherein a range of at least one protective layer is larger than a range of the bending area. The touch display device according to claim 7, wherein the material of the protective layer is metal, and the ductility of the protective layer is greater than the ductility of the wires. The touch display device according to claim 7, wherein a width of the protective layer is greater than the first width and the second width.