TW202245557A - Circuit design and touch panel - Google Patents

Abstract

A circuit design includes a flexible film, an electrode pattern, and a connecting circuit. The flexible film has a visible area and a bending area and includes an external conductive connection. The electrode pattern is disposed in the visible area of the flexible sensing film. The connecting circuit is electrically connected to the electrode pattern and disposed in the bending area of the flexible sensing film. The bending area has a first portion and a second portion. The first portion is located between the visible area and the second portion. The width of one end of the second portion connected to the first portion is smaller than a width of the first portion. The external conductive connection is electrically connected to the connecting circuit and located at the other end of the second portion.

Description

Circuit design and touch panel

The disclosure relates to a circuit design and a touch panel.

Today's demand for terminals such as smart phones and tablet PCs stimulates the development of touch technology towards thinner thickness, narrower borders and lower cost products. Currently, there are various products with narrow bezels on the market, and the width of the bezels depends on the line width and line spacing of the metal wires. Generally, the line width obtained by screen printing technology is about 60-80 microns, the line width obtained by gravure printing technology is about 30-50 microns, and the line width obtained by silver paste printing technology is about 20-30 microns, the most common The yellow photolithography process is 15 microns. However, the formed thin metal wires are also prone to the problem of poor adhesion and peeling off.

On the other hand, based on the bendability of the flexible film, using the flexible film and bending it to the back of the product can also greatly reduce the frame width. However, during the bending process, the risk of disconnection is often accompanied by an increase in the risk of wire breakage and the detachment of circuit bonding joints (such as conductive pads), which in turn leads to a decrease in product yield.

In view of this, one purpose of this disclosure is to propose a circuit design and a touch panel that can solve the above problems.

One aspect of the present disclosure provides a circuit design, which includes a flexible film, electrode patterns, and connection lines. The flexible film has a viewing area and a bending area and includes external conductive connections. The electrode pattern is located in the visible area of the flexible film. The connection wire is electrically connected to the electrode pattern and located at the bending area of the flexible film. The bending area has a first part and a second part. The first part is located between the visible area and the second part, and the width of one end of the second part connected with the first part is smaller than the width of the first part. The external conductive connection is electrically connected to the connecting wire and is located at the other end of the second part.

According to some embodiments of the present disclosure, each of the electrode pattern, the connection line and the external conductive connection includes a silver nanowire.

According to some embodiments of the present disclosure, the connecting wire is a mesh channel.

According to some embodiments of the present disclosure, the connection line includes a first sub-circuit and a second sub-circuit arranged side by side.

According to some embodiments of the present disclosure, each of the first sub-circuit and the second sub-circuit is a mesh channel.

Another aspect of the present disclosure provides a circuit design, which includes a flexible film, an electrode pattern, and a connecting line. The flexible film has a viewing area and a bending area. The electrode pattern is located in the visible area of the flexible film. The connection line is electrically connected to the electrode pattern and located in the bending area of the flexible film, wherein the connection line is in a straight line.

According to some embodiments of the present disclosure, the electrode patterns and the connection lines each include silver nanowires.

According to some embodiments of the present disclosure, the circuit design on the flexible film further includes a flexible printed circuit board disposed away from the viewing area at one end of the bending area and electrically connected to the connecting wires.

According to some embodiments of the present disclosure, the electrode pattern extends to the bending area.

According to some embodiments of the present disclosure, the circuit design on the flexible film further includes a silver paste pad disposed between the electrode pattern and the connection line, and directly contacts the electrode pattern and the connection line.

According to some embodiments of the present disclosure, the connecting wire is a mesh channel.

According to some embodiments of the present disclosure, the connection line includes a first sub-circuit and a second sub-circuit arranged side by side.

According to some embodiments of the present disclosure, each of the first sub-circuit and the second sub-circuit is a mesh channel.

Another aspect of the present disclosure provides a circuit design, which includes a flexible film, an electrode pattern, and a connecting line. The flexible film has a viewing area and a bending area. The electrode pattern is located in the visible area of the flexible film. The connection wire is electrically connected to the electrode pattern and located at the bending area of the flexible film, wherein the connection wire has the same circuit pattern as the electrode pattern.

According to some embodiments of the present disclosure, the electrode patterns and the connection lines each include silver nanowires.

According to some embodiments of the present disclosure, the circuit design further includes a flexible printed circuit board disposed at one end of the bending area away from the viewing area and electrically connected to the connecting wires.

Another aspect of the present disclosure provides a touch panel, which includes a liquid crystal display module, any of the above-mentioned circuit designs, a transparent cover and a circuit board. The circuit design is arranged above the liquid crystal display module. The transparent cover is arranged above the circuit design. The circuit board is arranged under the liquid crystal display module, wherein the bending area of the flexible film of the circuit design is bent downward, and the circuit design is electrically connected to the circuit board.

In order to make the description of the present disclosure more detailed and complete, the following provides an illustrative description of the implementation and specific embodiments of the present disclosure; but this is not the only way to implement or use the specific embodiments of the present disclosure. The various embodiments disclosed below can be combined or replaced with each other when beneficial, and other embodiments can also be added to one embodiment, without further description or illustration.

It can be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers, and/or sections, these elements, components, regions , layer, and/or section should not be limited by these terms, and these terms are only used to distinguish different elements, components, regions, layers, and/or sections. Thus, a first element, component, region, layer, and/or section discussed below could be termed a second element, component, region, layer, and/or section without departing from the teachings of the present invention. part.

In the following description, numerous specific details will be set forth in order to enable readers to fully understand the following embodiments. However, embodiments of the present disclosure may be practiced without these specific details. In other instances, well-known structures and devices are only schematically shown in order to simplify the drawings. In order to make the description of the present disclosure more detailed and complete, reference may be made to the accompanying drawings and various implementations described below, and the same numbers in the drawings represent the same or similar elements.

FIG. 1 is a schematic cross-sectional view of a touch panel 10 according to a comparative example of the present disclosure, wherein the flexible film 110 is not bent. FIG. 2 shows a schematic top view of a circuit design according to a comparative example of the present disclosure. FIG. 3 shows a schematic cross-sectional view of a touch panel 10 according to a comparative example of the present disclosure, wherein the flexible film 110 is bent. Please refer to FIG. 1 , FIG. 2 and FIG. 3 at the same time. The touch panel 10 includes a flexible film 110 , a display module 120 and a transparent cover 130 . Specifically, the flexible film 110 is sandwiched between the display module 120 and the transparent cover 130 . In order to meet the narrow frame design of the touch panel, the existing touch panel 10 lengthens the flexible film 110 so that it can be bent downward to the bottom of the display module 120 , as shown in FIG. 3 .

In multiple embodiments, the touch panel 10 is used to receive a user's touch, convert the information contained in the user's touch into a touch signal, and then transmit it to a processing device such as a motherboard of a display module for signal analysis. The flexible film 110 has the advantage of high transparency, so that the light containing image information emitted by the touch panel 10 passes through the transparent cover 130 to the user. In various embodiments, the flexible film 110 may comprise nylon, polyethylene, polypropylene, polycarbonate, polyurethane, polytetrafluoroethylene, polyethylene terephthalate, polymethyl methacrylate, poly Styrene polyvinyl chloride, but not limited thereto.

As shown in FIG. 2 , the flexible film 110 has a viewable area VA and bending areas BA located at two ends of the viewable area VA. It should be noted that, herein, the area where the flexible film 110 overlaps with the display module 120 is defined as the visible area VA, and the area that does not overlap with the display module 120 is defined as the bending area BA. In more detail, the circuit design on the flexible film 110 includes electrode patterns 112 and connection lines 114 . The electrode pattern 112 is located in the visible area VA of the flexible film 110 , and the connection line 114 is located in the bending area BA of the flexible film 110 . Generally speaking, a contact pad 116 is disposed at the junction of the electrode pattern 112 and the connection line 114 . However, during the bending process of the flexible film 110 , the connection wires may be broken or the contact pads 116 may fall off, resulting in poor product yield.

In order to avoid the problem of poor product yield caused by the breakage of the flexible film during the bending process, the present disclosure provides a plurality of circuit design embodiments that can solve the above problems. In order to compare the differences with the above-mentioned implementations and simplify the description, the same symbols are used to mark the same components in the following embodiments, and the descriptions are mainly focused on the differences between the implementations, and the repetitions will not be repeated. The overlay part will be repeated.

FIG. 4 shows a schematic top view of a circuit design 40 according to an embodiment of the present disclosure. As shown in FIG. 4 , the circuit design 40 includes a flexible film 110 , electrode patterns 410 and connecting wires 420 . Specifically, the flexible film 110 has a visible area VA and a bending area BA, and the flexible film 110 further includes an external conductive connection 430 . The electrode pattern 410 is located in the visible area VA of the flexible film 110 . In various embodiments, the shape of the electrode pattern 410 can be designed according to the input principle of the touch panel (eg, capacitive, resistive, and pressure). In one embodiment, the electrode pattern 410 includes silver nanowire (SNW). It can be understood that the silver nano wire has the characteristic of resistance to bending, therefore, the problem of line breakage is not easy to occur during the subsequent bending process of the flexible film 110 . In addition, the silver nano wire has good electrical conductivity and light transmission. In some embodiments, the silver nanowire ink material can be coated on the flexible transparent film, and then, the flexible film 110 having the nanoscale silver wire electrode pattern 410 is produced by using a patterning process.

Please continue to refer to FIG. 4 , the connection wire 420 is electrically connected to the electrode pattern 410 and located at the bending area BA of the flexible film 110 . In more detail, the bending area BA has a first portion BA1 and a second portion BA2. The first portion BA1 is located between the viewing area VA and the second portion BA2, and the width W1 of an end of the second portion BA2 connected to the first portion BA1 is smaller than the width W2 of the first portion BA1. It should be noted that this embodiment does not require additional bonding of a flexible printed circuit board (FCP). By lengthening the flexible film 110 and cutting it into a shape that can replace the flexible printed circuit board, a process of bonding the flexible printed circuit board to the flexible film can be saved, thereby improving the process yield of the touch panel. In one embodiment, the connection wire 420 includes silver nanowire (SNW). It can be understood that the silver nano wire has the characteristic of resistance to bending, therefore, the problem of line breakage is not easy to occur during the subsequent bending process of the flexible film 110 . In addition, the silver nano wire has good electrical conductivity and light transmission. It can be understood that the connection wire 420 serves as an electrical bridge between the electrode pattern 410 and the external conductive connection 430 .

Please continue to refer to FIG. 4 , the external conductive connection 430 is electrically connected to the connecting wire 420 and is located at the other end of the second part BA2 . In one embodiment, the external conductive connection 430 includes silver nanowire (SNW). It can be understood that the silver nano wire has the characteristic of resistance to bending, therefore, the problem of line breakage is not easy to occur during the subsequent bending process of the flexible film 110 . In addition, the silver nano wire has good electrical conductivity and light transmission. It can be understood that the external conductive connection 430 is used to transmit the signal received by the electrode pattern 410 located in the viewing area VA to the display module 120 .

FIG. 5 shows a schematic top view of a circuit design 50 according to an embodiment of the present disclosure. The difference between the circuit design 50 shown in FIG. 5 and the circuit design 40 shown in FIG. 4 lies in that the connection line 520 can be a mesh channel. In more detail, the mesh channel can be designed in various grid shapes, such as square, rhombus, triangle or a combination thereof, but not limited thereto. This design can improve the fault tolerance of the flexible film 110 breaking after being bent.

FIG. 6 shows a schematic top view of a circuit design 60 according to an embodiment of the present disclosure. The difference between the circuit design 60 shown in FIG. 6 and the circuit design 40 shown in FIG. 4 is that the connection line 620 includes a first sub-circuit 622 and a second sub-circuit 624 arranged side by side. In other words, the first sub-circuit 622 and the second sub-circuit 624 are designed in parallel. This design can improve the fault tolerance of the flexible film 110 breaking after being bent. For example, if the first sub-circuit 622 is disconnected after the flexible film 110 is bent, the electrode pattern 410 can still be electrically connected to the external conductive connection 430 through the second sub-circuit 624 . Although the connection line 620 in FIG. 6 only shows two sub-circuits 622/624, in other alternative embodiments, the connection line 620 may include three, four, five and/or more sub-circuits.

Experimental example: line disconnection risk and product yield test

Using the circuit design on the flexible film as shown in Figure 2 of the comparative example of the present disclosure, the circuit design 50 shown in Figure 5 of an embodiment of the present disclosure, and the circuit design 50 of another embodiment of the present disclosure as shown in Figure 6 After the circuit design 60 shown is bent, the test results of circuit breakage rate and product yield rate are shown in Table 1 below.

Table I Line disconnection rate (%) Product yield (%) comparative example 5.0 95.0 Circuit Design 50 2.5-1.0 97.5-99.0 Circuit Design 60 2.5-1.0 97.5-99

As can be seen from the above table 1, compared with the circuit design of the comparative example shown in Figure 2, the circuit design 50/60 of the present disclosure can reduce the probability of circuit breakage after the flexible film is bent, and effectively Improve product yield.

FIG. 7 shows a schematic top view of a circuit design 70 according to an embodiment of the present disclosure. The difference between the circuit design 70 shown in FIG. 7 and the circuit design 40 shown in FIG. 4 is that the connection line 720 may further include a first sub-circuit 722 and a second sub-circuit 724 arranged side by side (or parallel connection). ) setting, and the first sub-circuit 722 and the second sub-circuit 724 are each a mesh channel. In more detail, the mesh channel can be designed in various grid shapes, such as square, rhombus, triangle or a combination thereof, but not limited thereto. This design can improve the fault tolerance of the flexible film 110 breaking after being bent. Although the connection line 720 in FIG. 7 only shows two sub-circuits 722/724, in other alternative embodiments, the connection line 720 may include three, four, five and/or more sub-circuits.

FIG. 8 shows a schematic top view of a circuit design 80 according to an embodiment of the present disclosure. As shown in FIG. 8 , the circuit design 80 includes a flexible film 110 , an electrode pattern 810 and a connecting wire 820 . Specifically, the flexible film 110 has a viewing area VA and a bending area BA, and the electrode pattern 810 is located in the viewing area VA of the flexible film 110 . In one embodiment, the electrode pattern 810 includes silver nanowire (SNW). It can be understood that the silver nano wire has the characteristic of resistance to bending, therefore, the problem of line breakage is not easy to occur during the subsequent bending process of the flexible film 110 . In addition, the silver nano wire has good electrical conductivity and light transmission. In some embodiments, the silver nanowire ink material can be coated on the flexible transparent film, and then, the flexible film 110 having the nanoscale silver wire electrode pattern 810 is fabricated by using a patterning process. For a detailed description of the electrode pattern 810 , please refer to the electrode pattern 410 in FIG. 4 .

Please continue to refer to FIG. 8 , the connection wire 820 is electrically connected to the electrode pattern 810 and located at the bending area BA of the flexible film 110 . It should be noted that the connection line 820 is straight. In more detail, the connection line 820 extends straightly from one end of the bending area BA to the other end along a direction D without any bending portion. In one embodiment, the connecting wire 820 includes silver nanowire (SNW). It can be understood that the silver nano wire has the characteristic of resistance to bending, therefore, the problem of line breakage is not easy to occur during the subsequent bending process of the flexible film 110 . In addition, the silver nano wire has good electrical conductivity and light transmission.

In some embodiments, the connection wire 820 may be a mesh channel. Although this embodiment is not shown in the figure, please refer to the connection line 520 shown in FIG. 5 for details. In more detail, the mesh channel can be designed in various grid shapes, such as square, rhombus, triangle or a combination thereof, but not limited thereto. This design can improve the fault tolerance of the flexible film 110 breaking after being bent.

In some embodiments, the connection line 820 may further include a first sub-circuit and a second sub-circuit arranged side by side (or in parallel). Although this embodiment is not shown in the figure, for details, please refer to the connection line 620 shown in FIG. 6 . It should be noted that the connection line 820 in this embodiment may include three, four, five and/or more sub-lines.

In some embodiments, the connection line 820 may further include a first sub-circuit and a second sub-circuit arranged side by side (or in parallel), and each of the first sub-circuit and the second sub-circuit is a mesh channel. Although this embodiment is not shown in the figure, please refer to the connection line 720 shown in FIG. 7 for details. It should be noted that the connection line 820 in this embodiment may include three, four, five and/or more meshed sub-lines.

Please continue to refer to FIG. 8 , in one embodiment, the circuit design 80 further includes a flexible printed circuit board 850 disposed at one end of the bending area BA away from the viewing area VA and electrically connected to the connecting wire 820 . More specifically, the flexible printed circuit board 850 has soldering pads 852 corresponding to the connecting wires 820 , and the connecting wires 820 are directly bonded to the corresponding soldering pads 852 on the flexible printed circuit board 850 through a pressing process. In various embodiments, a plurality of flexible printed circuit boards 850 can be used to electrically connect corresponding connecting wires 820 .

FIG. 9 shows a schematic top view of a circuit design 90 according to an embodiment of the present disclosure. The difference between the circuit design 90 shown in FIG. 9 and the circuit design 80 shown in FIG. 8 lies in that the electrode pattern 810 extends to the bending area BA. This design can reduce the risk of breaking the flexible film 110 during the bending process.

FIG. 10 shows a schematic top view of a circuit design 1100 according to an embodiment of the present disclosure. The difference between the circuit design 1000 shown in FIG. 10 and the circuit design 80 shown in FIG. 8 is that the circuit design 1000 further includes a silver paste pad 1030 disposed between the electrode pattern 810 and the connection line 820 , and directly contact the electrode pattern 810 and the connecting line 820 .

FIG. 11 shows a schematic top view of a circuit design 1100 according to an embodiment of the present disclosure. As shown in FIG. 10 , the circuit design 1100 includes a flexible film 110 , electrode patterns 1110 and connecting wires 1120 . Specifically, the flexible film 110 has a viewing area VA and a bending area BA, and the electrode pattern 1110 is located in the viewing area VA of the flexible film 110 . In one embodiment, the electrode pattern 1110 includes silver nanowire (SNW). It can be understood that the silver nano wire has the characteristic of resistance to bending, therefore, the problem of line breakage is not easy to occur during the subsequent bending process of the flexible film 110 . In addition, the silver nano wire has good electrical conductivity and light transmission. In some embodiments, the silver nanowire ink material can be coated on the flexible transparent film, and then, the flexible film 110 having the nanoscale silver wire electrode pattern 1110 is produced by using a patterning process. For a detailed description of the electrode pattern 1110 , please refer to the electrode pattern 410 in FIG. 4 .

Please continue to refer to FIG. 11 , the connection wire 1120 is electrically connected to the electrode pattern 1110 and located at the bending area BA of the flexible film 110 . It should be noted that the connection line 1020 has the same wiring pattern as the electrode pattern 1110 . In one embodiment, the electrode patterns 1110 and the connection lines 1020 are formed simultaneously in the same process step. This design can reduce the risk of breaking the flexible film 110 during the bending process. In one embodiment, the connection wire 1120 includes silver nanowire (SNW). It can be understood that the silver nano wire has the characteristic of resistance to bending, therefore, the problem of line breakage is not easy to occur during the subsequent bending process of the flexible film 110 . In addition, the silver nano wire has good electrical conductivity and light transmission.

Please continue to refer to FIG. 11 , in one embodiment, the circuit design 1110 further includes a flexible printed circuit board 1150 disposed at one end of the bending area BA away from the viewing area VA and electrically connected to the connecting wire 1120 . More specifically, the flexible printed circuit board 1150 has soldering pads 1152 corresponding to the connecting wires 1120 , and the connecting wires 1120 are directly bonded to the corresponding soldering pads 1152 on the flexible printed circuit board 1150 through a pressing process. In various embodiments, a plurality of flexible printed circuit boards 1150 can be used to electrically connect corresponding connecting wires 1120 .

FIG. 12 shows a schematic cross-sectional view of a touch panel 1200 according to an embodiment of the present disclosure. The touch panel 1200 includes a liquid crystal display module 1210 , circuit designs 40/50/60/70/80/90/1000/1100 as mentioned above, a transparent cover 1220 and a circuit board 1230 . In various embodiments, the liquid crystal display module 1210 may include a liquid crystal display panel (not shown) and a backlight module (not shown). Generally speaking, the liquid crystal display panel and the backlight module can be combined and fixed by a frame to form the liquid crystal display module 1210 . In multiple embodiments, the backlight module substantially further includes components such as an optical film set, a light guide plate, a light source set, and a reflection sheet.

As shown in FIG. 12 , the circuit design 40/50/60/70/80/90/1000/1100 is located above the liquid crystal display module 1210 . In multiple embodiments, the circuit design 40/50/60/70/80/90/1000/1100 on the flexible film 110 is used to receive the user's touch and convert the information contained in the user's touch A touch signal is generated, and then transmitted to a processing device such as a main board of a display module for signal analysis. Furthermore, the flexible film 110 also has the advantage of high transparency, so that the light containing the image information emitted by the touch panel 1200 is transmitted to the user through the transparent cover 1220 . In various embodiments, the flexible film 110 may comprise nylon, polyethylene, polypropylene, polycarbonate, polyurethane, polytetrafluoroethylene, polyethylene terephthalate, polymethyl methacrylate, poly Styrene polyvinyl chloride, but not limited thereto.

As shown in FIG. 12, the transparent cover 1220 is disposed above the circuit design 40/50/60/70/80/90/1000/1100. In various embodiments, the transparent cover 1220 may be a cover glass. In various embodiments, the transparent cover 1220 may comprise polyethylene terephthalate (Polyethylene Terephthalate, PET), polyimide (Polyimide, PI), polyethylene naphthalate (Polyethylene Naphthalatc , PEN), polyether 碸 (Poly(ether sulfones), PES), polyetheretherketone (Polyetheretherketone, PEEK), polycarbonate (Polycarbonate, PC), polypropylene (polypropylene, PP), polyamide (Polyamide, PA) or polymethyl methacrylate (Poly(methyl methacrylate), PMMA), but not limited thereto.

As shown in FIG. 12 , the circuit board 1230 is disposed under the liquid crystal display module 1210 . Specifically, after the bending area BA of the flexible film 110 of the circuit design 40/50/60/70/80/90/1000/1100 is bent downward, the circuit design 40/ 50/60/70/80/90/1000/1100 are electrically connected to the circuit board 1230 . In more detail, the circuit designs 40/50/60/70/80/90/1000/1100 on the flexible film 110 can be electrically connected to the circuit board 1230 through an external conductive connection or a flexible printed circuit board.

In various embodiments, the touch panel 1200 may further include an optical adhesive 1240 located between the liquid crystal display module 1210 and the circuit board 1230 . The optical glue 1240 is used to increase the adhesion between the liquid crystal display module 1210 and the circuit board 1230 .

To sum up, the circuit design disclosed in the present disclosure can reduce the risk of disconnection of the circuit during the bending process of the flexible film, thereby improving the product yield.

Although the present invention has been disclosed as above in terms of implementation, the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. All kinds of equivalent changes and modifications should fall within the scope of the present invention, so the scope of protection of the present invention should be defined by the scope of the appended patent application.

10: Touch panel 110: flexible film 112: electrode pattern 114: connecting line 116: contact pad 120: Display module 130: transparent cover 40: Circuit design 410: electrode pattern 420: connecting line 430: external conductive connection 50: Circuit design 520: connecting line 60: Circuit design 620: connecting line 622: The first sub-line 624: The second sub-line 70: Circuit design 720: connecting line 722: The first sub-line 724: The second sub-line 80: Circuit design 810: electrode pattern 820: connecting line 850: Flexible printed circuit board 852: Welding pad 90: Circuit design 1000: circuit design 1100: Circuit design 1150: flexible printed circuit board 1152: welding pad 1200: touch panel 1210: LCD module 1220: transparent cover 1230: circuit board 1240: optical glue BA: bending area BA1: Part One BA2: Part Two D: Direction VA: Visual Area W1: width W2: width

In order to make the above and other objects, features, advantages and implementations of the present invention more clearly understood, the detailed description of the accompanying drawings is as follows: FIG. 1 is a schematic cross-sectional view of a touch panel according to a comparative example of the present disclosure, wherein the flexible film is not bent. FIG. 2 shows a schematic top view of a circuit design according to a comparative example of the present disclosure. FIG. 3 is a schematic cross-sectional view of a touch panel according to a comparative example of the present disclosure, wherein the flexible film is bent. FIG. 4 shows a schematic top view of a circuit design according to an embodiment of the present disclosure. FIG. 5 shows a schematic top view of a circuit design according to an embodiment of the present disclosure. FIG. 6 shows a schematic top view of a circuit design according to an embodiment of the present disclosure. FIG. 7 shows a schematic top view of a circuit design according to an embodiment of the present disclosure. FIG. 8 shows a schematic top view of a circuit design according to an embodiment of the present disclosure. FIG. 9 is a schematic top view of a circuit design according to an embodiment of the present disclosure. FIG. 10 shows a schematic top view of a circuit design according to an embodiment of the present disclosure. FIG. 11 shows a schematic top view of a circuit design according to an embodiment of the present disclosure. FIG. 12 is a schematic cross-sectional view of a touch panel according to an embodiment of the disclosure.

Domestic deposit information (please note in order of depositor, date, and number) none Overseas storage information (please note in order of storage country, institution, date, and number) none

40: Circuit design

110: flexible film

120: Display module

130: transparent cover

410: electrode pattern

420: connecting line

430: external conductive connection

BA: bending area

BA1: Part One

BA2: Part Two

VA: Visual Area

W1: width

W2: width

Claims (17)

A circuit design comprising: A flexible film includes an external conductive connection and has a viewing area and a bending area; an electrode pattern located in the visible area of the flexible film; and a connection line, electrically connected to the electrode pattern and located in the bending area of the flexible film, wherein the bending area has a first part and a second part, the first part is located in the visible area and the second part The width of one end of the second portion connected to the first portion is smaller than the width of the first portion, wherein the external conductive connection is electrically connected to the connection line and is located at the other end of the second portion. The circuit design according to claim 1, wherein each of the electrode pattern, the connection line and the external conductive connection includes a silver nanowire. The circuit design as described in Claim 1, wherein the connection line is a mesh channel. The circuit design according to claim 1, wherein the connection line includes a first sub-circuit and a second sub-circuit arranged side by side. The circuit design according to claim 4, wherein each of the first sub-circuit and the second sub-circuit is a mesh channel. A circuit design comprising: A flexible film has a viewing area and a bending area; an electrode pattern located in the visible area of the flexible film; and A connection line is electrically connected to the electrode pattern and located at the bending area of the flexible film, wherein the connection line is a straight line. The circuit design according to claim 6, wherein the electrode pattern and the connection line each comprise nano silver wires. The circuit design as described in Claim 6 further includes a flexible printed circuit board disposed at one end of the bending area away from the viewing area and electrically connected to the connecting wire. The circuit design according to claim 6, wherein the electrode pattern extends to the bending area. The circuit design as described in Claim 6 further includes a silver paste pad disposed between the electrode pattern and the connection line, and directly contacts the electrode pattern and the connection line. The circuit design as claimed in item 6, wherein the connection line is a mesh channel. The circuit design according to claim 6, wherein the connection line includes a first sub-circuit and a second sub-circuit arranged side by side. The circuit design according to claim 12, wherein each of the first sub-circuit and the second sub-circuit is a mesh channel. A circuit design comprising: A flexible film has a viewing area and a bending area; an electrode pattern located in the visible area of the flexible film; and A connection line is electrically connected to the electrode pattern and located at the bending area of the flexible film, wherein the connection line has the same circuit pattern as the electrode pattern. The circuit design according to claim 14, wherein each of the electrode pattern and the connection line comprises a nano silver line. The circuit design as described in claim 14 further includes a flexible printed circuit board disposed at one end of the bending area away from the viewing area and electrically connected to the connecting wire. A touch panel comprising: A liquid crystal display module; The circuit design as described in claim 1, claim 6 or claim 14 is arranged above the liquid crystal display module; a transparent cover plate arranged above the circuit design; and A circuit board is arranged under the liquid crystal display module, wherein the bending area of the flexible film of the circuit design is bent downward, and the circuit design is electrically connected to the circuit board.

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