CN204480198U - Contact panel - Google Patents

Abstract

The utility model relates to technical field of touch control, provides a kind of contact panel, comprises a flexible base, board and a trace layer.Flexible base, board has a touch-control sensing portion and an extension, and extension protrudes from the side in touch-control sensing portion, and touch-control sensing portion is distinguished a touch-control sensing district and a surrounding zone.Trace layer is arranged on flexible base, board, and trace layer has the second lead-in wire that many first lead-in wires connecting touch-control sensing districts and many connect control panels, and many first lead-in wires go between to be electrically connected in the junction of touch-control sensing portion and extension with many second.Wherein the junction of touch-control sensing portion and extension has at least one breach.The substrate of tool touch control sensing circuit and flexible printed wiring board are integrated and are arranged on same substrate by the utility model, avoid carrying out engagement step, solve the problem of stress concentration of described substrate at invagination whereby.

Description

touch panel

technical field

The utility model relates to a touch panel, in particular to a touch panel with a flexible substrate as a substrate.

Background technique

In recent years, with the development of touch panel technology, touch panels have been widely used in various electronic products, such as mobile phones, tablet computers, laptop computers, palmtop computers, and wearable devices. Usually, the touch panel is integrated with the display panel as the input and output interface of the above-mentioned electronic products, so as to achieve touch and display functions at the same time.

In the past, the structure of the touch panel is to use anisotropic conductive film (ACF) to electrically bond the substrate with the touch sensing circuit and the flexible printed circuit board (Flexible Print Circuit Board; FPC) to make the touch sense The sensing signal on the detection circuit is sent to the rear detection circuit for processing.

Most of the current technologies use lamination process to join the flexible printed circuit board and the substrate with the touch sensing circuit. At present, the lamination process includes at least an anisotropic conductive adhesive coating process, a hot pressing process, and the like. However, each manufacturing process may cause damage to the touch panel, such as short circuit or open circuit due to glue overflow, which reduces the yield of the touch panel.

Utility model content

In view of the above problems, the utility model provides a touch panel, which can integrate the substrate with the touch sensing circuit and the flexible printed circuit board on the same substrate, avoiding the bonding step and solving the problem of the substrate at the same time. Stress concentration problem at the inflection point.

A touch panel according to the present invention includes a flexible substrate and a lead layer. The flexible substrate has a touch sensing part and an extension part. The extension part protrudes from one side of the touch sensing part. The touch sensing part is divided into a touch sensing area and a peripheral area. The lead layer is arranged on the flexible substrate. The lead layer has a plurality of first leads connected to the touch sensing area and a plurality of second leads connected to a control board. The plurality of first leads and the plurality of second leads are used in the touch sensing The intersection of the portion and the extension portion is electrically connected. Wherein, there is at least one notch at the intersection of the touch sensing part and the extension part.

In one embodiment, the flexible substrate has two notches.

In one embodiment, the peripheral area has a wire outlet, the extension part corresponds to the position of the wire outlet, and the two notches are respectively located on opposite sides of the wire outlet.

In one embodiment, the plurality of second leads are formed by extending the plurality of first leads from the peripheral region, passing through the outlet opening, and then extending toward the extension portion.

In one embodiment, the width of the notch is greater than or equal to 0.5 mm, and the depth of the notch is greater than or equal to 1 mm.

In one embodiment, the shape of the extension is square, rectangular, or trapezoidal.

In one embodiment, the extension portion further includes a first extension portion and a second extension portion, the first extension portion protrudes from one side of the touch sensing portion along an axial direction, and the second extension portion protrudes along the axial direction protruding from a side of the first extension portion opposite to the touch sensing portion.

In one embodiment, the shape of the first extending portion is trapezoidal.

In one embodiment, each second lead is formed by a third sub-lead and a fourth sub-lead, the third sub-lead is arranged on the first extension part and is electrically connected to one of the first leads, and the fourth sub-lead It is disposed on the second extension part and electrically connected to the third sub-lead.

In one embodiment, the line width of the third sub-lead is greater than that of the first lead.

In one embodiment, the line width of the third sub-lead gradually becomes narrower from the peripheral region to the second extension portion.

In one embodiment, the touch panel further includes a protection layer disposed on the lead layer and corresponding to at least part of the peripheral region, so as to cover at least part of the plurality of first leads.

In one embodiment, the extension part further distinguishes a lead area and an overlapping area, the overlapping area is adjacent to the lead area, the overlapping area has a plurality of pins, and a plurality of second leads are arranged in the lead area and electrically connected multiple pins.

In one embodiment, the distance between the plurality of second leads is wider closer to the overlapping area.

In one embodiment, the touch panel further includes a protective layer, which is disposed on the lead layer and corresponding to the lead area, so as to cover at least part of the plurality of second lead wires.

In one embodiment, the material of the protective layer is a flexible insulating ink material.

In one embodiment, the touch panel further includes a strengthening layer, the strengthening layer and the lead layer are respectively disposed on opposite sides of the flexible substrate, and the position of the strengthening layer at least corresponds to the position of the overlapping area.

In one embodiment, the material of the strengthening layer is polyimide.

In one embodiment, the material of the flexible substrate includes polyethylene terephthalate, polycarbonate, cycloolefin polymer, cellulose triacetate, polyethersulfone, polyolefin, polymethylmethacrylate, or combination of the above.

In one embodiment, the material of the wiring layer includes nano-silver, nano-copper alloy, carbon nanotube, or a combination thereof.

Another touch panel according to the present invention includes a flexible substrate and a lead layer. The flexible substrate has a touch sensing part and an extension part. The extension part protrudes from one side of the touch sensing part. The touch sensing part is divided into a touch sensing area and a peripheral area. The lead layer is arranged on the flexible substrate. The lead layer has a plurality of first leads connected to the touch sensing area and a plurality of second leads connected to a control board. The plurality of first leads and the plurality of second leads are used in the touch sensing The intersection of the portion and the extension portion is electrically connected. Wherein the plurality of second lead wires are electrically connected with the control board at one side of the extension part.

In one embodiment, the material of the wiring layer includes nano-silver, nano-copper alloy, carbon nanotube, or a combination thereof.

In one embodiment, there is at least one notch at the intersection of the touch sensing part and the extension part.

In one embodiment, the peripheral area has a wire outlet, the extension portion corresponds to the position of the wire outlet, and opposite sides of the wire outlet respectively have a notch.

In one embodiment, the width of the notch is greater than or equal to 0.5 mm, and the depth of the notch is greater than or equal to 1 mm.

In one embodiment, the shape of the extension is square, rectangular, or trapezoidal.

In one embodiment, the extension part further distinguishes a lead area and an overlapping area, the overlapping area is adjacent to the lead area, the overlapping area has a plurality of pins, and a plurality of second leads are arranged in the lead area and electrically connected multiple pins.

In one embodiment, the touch panel further includes a protective layer, which is disposed on the lead layer and corresponds to the position of the lead region and at least part of the peripheral region, so as to cover at least part of the plurality of first leads and the plurality of second leads. Two leads.

In one embodiment, the touch panel further includes a strengthening layer, the strengthening layer and the lead layer are respectively disposed on opposite sides of the flexible substrate, and the position of the strengthening layer at least corresponds to the position of the overlapping area.

To sum up, the present invention provides a touch panel, which integrates the known substrate with touch sensing circuit (touch sensing part) and the known flexible printed circuit board (extension part) on the same substrate to achieve different Need to carry out bonding steps, improve yield rate, reduce material cost and shorten production time and other functions.

In addition, there is a notch at the intersection of one side of the touch sensing part and one side of the extension part, so that when the extension part is folded back to the bottom of the touch sensing part, the notch can disperse the stress generated by the inflection, In order to avoid breakage between the touch sensing part and the extension part due to reflexion, the use reliability of the touch panel is improved.

In addition, using nano-silver, nano-copper alloy, carbon nanotubes, or the above-mentioned combination as the material of the lead layer, using the flexible characteristics of the above-mentioned materials, further avoids when the extension part is folded under the touch-sensing part. When the lead layer is broken, the risk of damage to the touch panel is reduced.

Description of drawings

FIG. 1A is a top view of a touch panel according to a preferred embodiment of the present invention.

FIG. 1B is a cross-sectional view along the dashed line AA' shown in FIG. 1A .

FIG. 1C is an enlarged view of the area Z1 shown in FIG. 1A .

FIG. 2A is a top view of a touch panel according to another preferred embodiment of the present invention.

FIG. 2B is an enlarged view of the area Z2 shown in FIG. 2A .

Fig. 3 is a top view of a touch panel according to another preferred embodiment of the present invention.

Fig. 4A is a top view of a touch panel according to another preferred embodiment of the present invention.

FIG. 4B is a cross-sectional view along the dashed line BB' shown in FIG. 4A.

detailed description

A touch panel according to a preferred embodiment of the present invention will be described below with reference to related drawings, wherein the same elements will be described with the same reference symbols.

First of all, it should be noted that the positional relationship of "upper", "lower", "left", and "right" in the following embodiments is a description made with reference to the drawings for the convenience of understanding, not As a limitation of this utility model.

FIG. 1A is a top view of a touch panel 1 according to a preferred embodiment of the present invention, and FIG. 1B is a cross-sectional view along the dotted line AA' shown in FIG. 1A . Please refer to FIG. 1A and FIG. 1B at the same time, the touch panel 1 includes a flexible substrate 2 and a wiring layer 3 . Generally speaking, the touch panel 1 is realized by using the flexible substrate 2 as a substrate, and the lead layer 3 is arranged on one side of the flexible substrate 2 .

The material of the flexible substrate 2 can be a transparent or opaque polymer insulating material, such as polyethylene terephthalate (Polyethylene terephthalate; PET), polycarbonate (Polycarbonate; PC), cycloolefin polymer (Cycloolefin polymer ; COP), tricellulose acetate (Tricellulose Acetate; TCA), polyethersulfone (Ployethersulfone; PES), polyolefin (polyolefin; PO), polymethylmethacrylate (Polymethylmethacrylate; PMMA), or a combination of the above.

In addition, the flexible substrate 2 can be a single-layer or multi-layer structure, which is not limited by the present invention. The thickness of the flexible substrate 2 may be about 45 microns to about 200 microns, such as 55 microns, 100 microns, or 175 microns, and the present invention is not limited thereto. Compared with ordinary glass substrates, the flexible substrate 2 is thinner and has good flexibility, and if the flexible substrate 2 is made of transparent materials, the flexible substrate 2 within the above thickness range has good optical properties, such as high transmittance.

The flexible substrate 2 has a touch sensing part 21 and an extension part 22 , and the extension part 22 protrudes from one side of the touch sensing part 21 . Further, the extension portion 22 may protrude from the lower side or the upper side of the touch sensing portion 21 along an axis (such as the Y axis), and of course the extension portion 22 may also protrude along another axis (such as the X axis). Protrude to the left or right side of the touch sensing part 21 , although the present embodiment takes the extension part 22 protruding from the lower side of the touch sensing part 21 as an example, the present invention is not limited thereto. In addition, although the touch panel 1 of this embodiment is an example with one extension 22, the utility model is not limited to this number, and the touch panel in other embodiments may have two or more extensions 22 .

In addition, although in this embodiment, the shape of the extension part 22 is substantially rectangular, the shape of the extension part 22 can be adjusted and designed according to the requirements of the actual product. For example, the shape of the extension portion 22 may also be square, trapezoidal, S-shaped, arc-shaped, or other various geometric shapes.

In this embodiment, the touch sensing part 21 can further distinguish a touch sensing area 211 and a peripheral area 212, the peripheral area 212 is set around the touch sensing area 211, of course, the peripheral area 212 can also be set in At least one side of the touch sensing area 211 is not limited by the present invention. In addition, the peripheral area 212 has a wire outlet O, and the wire outlet O is located on the periphery of the touch sensing part 21 , and the extension part 22 corresponds to the position of the wire outlet O. As shown in FIG. More specifically, the extension portion 22 protrudes from the position of the wire outlet O to one side of the touch sensing portion 21 .

A single or multiple layers of sensing electrode layers (not shown) may be disposed in the touch sensing area 211 , and the sensing electrode layer is not limited to be composed of uniaxial or biaxial sensing electrode axes. Each sensing electrode axis may further include a plurality of sensing electrodes, and the shape of the sensing electrodes may be designed into, for example, square, rectangular, rhombus, triangle, polygon, or other various geometric shapes according to actual circuit requirements. The sensing electrode layer can be formed by depositing conductive material by sputtering or chemical vapor deposition method, and patterning the conductive material by photolithography to form the touch sensor layer. Survey area 211. The conductive material can be transparent or opaque, and it is preferably transparent, such as indium tin oxide (indium tin oxide; ITO), indium zinc oxide (indium zinc oxide; IZO), cadmium tin oxide (cadmium tin oxide; CTO) , aluminum zinc oxide (aluminum zinc oxide; AZO), indium tin zinc oxide (indium tin zinc oxide; ITZO), zinc oxide (zinc oxide; ZnO), cadmium oxide (cadmium oxide; CdO), indium gallium zinc oxide (indium gallium zinc oxide; InGaZnO), indium gallium zinc magnesium oxide (InGaZnMgO), indium gallium magnesium oxide (InGaMgO), or indium gallium aluminum oxide (InGaAlO) and other materials. The conductive material can also be a metal nanowire or a metal mesh, and the metal nanowire can be, for example, silver nanowire (SNW) or carbon nanotube (carbon nanotube).

The lead layer 3 includes a plurality of first leads 31 and a plurality of second leads 32 . A plurality of first lead wires 31 are disposed on the touch sensing portion 21 corresponding to the peripheral area 212 , and a plurality of second lead wires 32 are disposed on the extension portion 22 . Furthermore, one end of the plurality of first lead wires 31 is electrically connected to the sensing electrode shaft in the touch sensing area 211 , and the other end is electrically connected to the plurality of second lead wires 32 respectively. The plurality of second leads 32 are electrically connected to a control board (not shown). In this embodiment, the plurality of second leads 32 can be formed by extending the plurality of first leads 31 from the peripheral region 212 and turning at the position of the outlet O and then extending toward the extension part 22, which can be formed without increasing the process steps. On the premise, a plurality of first lead wires 31 and a plurality of second lead wires 32 are formed with the same material, so as to reduce the manufacturing process and increase the accuracy of circuit layout. In some embodiments, the plurality of second leads 32 may be formed by extending the plurality of first leads 31 from the peripheral region 212 and passing through the outlet O and then extending directly to the extension portion 22, that is, the plurality of first leads 31 There is no turning point at the position of exit O.

Continuing from the above paragraph, in this way, the sensing signals on the axes of the sensing electrodes can be sequentially transmitted through a first lead 31 and a second lead 32 electrically connected to the first lead 31 . It is worth mentioning that the number of first lead wires 31 preferably corresponds to the number of sensing electrode axes, and the number of second lead wires 32 preferably corresponds to the number of first lead wires 31 . In addition, the material of the wiring layer 3 is a flexible conductive material, such as nano-silver, nano-copper alloy, carbon nanotube, or a combination thereof. In this embodiment, the material of the wire layer 3 is silver nano paste as an example. In other words, the first wires 31 and the second wires 32 may be silver nano wires.

On the extension portion 22 , a lead area R1 and an overlapping area R2 can be distinguished, and the overlapping area R2 is adjacent to the lead area R1 . The lead region R1 is disposed between the touch sensing portion 21 and the overlapping region R2. A plurality of pins 4 electrically insulated from each other are disposed in the overlapping region R2. The aforementioned plurality of second leads 32 are disposed in the lead region R1 and are insulated from each other, and the two ends of the plurality of second leads 32 are respectively electrically connected to the corresponding first leads 31 and the corresponding pins 4 . In this embodiment, the plurality of pins 4 may be arranged on the lead layer 3 in an overlapping manner, and electrically connected to the corresponding plurality of second lead wires 32, that is, the plurality of pins 4 and the lead wires Layer 3 is located in a different layer. In some other embodiments, the pin 4 can be arranged on the same layer as the lead layer 3, in this case, the material of the pin 4 can be selected from the same material as the first lead 31 and the second lead 32, so that the lead The pin 4 and the first lead 31 and the second lead 32 can be formed in the same process step, so as to reduce the process steps and increase the accuracy of wiring.

In practical applications, when the extension part 22 is electrically connected to the control board, the sensing signal in the touch sensing area 211 can be transmitted to the rear end through the first lead 31, the second lead 32, and the pin 4 in sequence. The detection circuit is used for the detection circuit at the rear end to determine the touch position. That is to say, the extension part 22 of this embodiment has the function of a flexible printed circuit board, so that the touch panel 1 can be directly electrically connected to the control board without additionally installing a flexible printed circuit board. In detail, the extension part 22 is electrically connected to the control board on one side of the extension part 22 through the second lead wire 32, and the way in which the extension part 22 is electrically connected to the control board may be to insert the extension part 22 into the control board In some embodiments, the pin 4 can also be electrically connected to the control board through thermocompression.

In the touch panel 1 of this embodiment, the touch sensing part 21 and the extension part 22 are integrated into a flexible substrate 2, that is, the extension part 22 is arranged to replace the flexible printed circuit board, which is similar to the known substrate and touch sensing circuit. Compared with known flexible printed circuit boards, the touch panel 1 does not need to go through the lamination process during the manufacturing process, which can improve product yield and reduce material costs, such as: anisotropic conductive adhesive, flexible printing The cost of the circuit board, and can shorten the time of product manufacturing.

Next, please refer to FIG. 1A and FIG. 1C at the same time. FIG. 1C is an enlarged view of the area Z1 shown in FIG. 1A . transition, and the notch F is formed at this junction. In practical applications, the number of notches F may not be limited to one, but preferably two, as shown in FIG. 1A . The two gaps F in this embodiment are located on opposite sides of the outlet O respectively. A notch F is formed at the intersection of the extension part 22 and the touch sensing part 21. When the user folds the extension part 22 instead of the known flexible printed circuit board to the bottom of the touch sensing part 21, the notch F can disperse the The stress generated by the inflection avoids excessive stress concentration and breakage between the touch sensing portion 21 and the extension portion 22 due to inflection, and improves the reliability of the touch panel 1 .

It is further defined here that the notch F has a width d1 and a depth d2, and the present embodiment shown in the figure is taken as an example for illustration, and those skilled in the art can easily deduce other implementations. Taking the notch F shown in FIG. 1A and FIG. 1C as an example, the width d1 refers to the linear distance from one side 22a of the extension part 22 to the leftmost side of the notch F, and the depth d2 refers to the distance from one side 21a of the touch sensing part 21 to the leftmost side of the notch F. The linear distance of the deepest part (upper side) of the notch F. In this embodiment, the width d1 is preferably greater than or equal to 0.5 mm, and the depth d2 is preferably greater than or equal to 1.0 mm. The width d1 and depth d2 can be adjusted according to the size of the touch panel 1 to achieve a better effect of dispersing stress.

In addition, it is worth mentioning that the distance d3 between the deepest (uppermost) of the notch F and the outermost first lead 31a can also be adjusted according to the size of the touch panel 1, so as to avoid turning the extension 22 backwards. When it is bent below the touch sensing part 21 , the outermost first lead 31 a is bent and broken. For example, when the size of the touch panel 1 is 6 inches or less, the distance d3 is preferably 0.5 mm; when the size of the touch panel 1 is 7 inches to 11 inches, the distance d3 is preferably 0.7 mm ; When the size of the touch panel 1 is above 11 inches, the distance d3 is preferably 1.0 mm.

FIG. 2A is a top view of a touch panel 1a in another preferred embodiment of the present invention. The following description will only focus on the differences from the touch panel 1 shown in FIG. 1A. For the rest of the same content, please refer to the aforementioned implementation example. Please refer to FIG. 2A , the extension portion 22 of the touch panel 1 a in this embodiment can be divided into a first extension portion 221 and a second extension portion 222 . Further, the first extension portion 221 may protrude from one side of the touch sensing portion 21 along an axial direction (such as the Y axis), and the second extension portion 222 protrudes along the axial direction (such as the Y axis). On the side of the first extension portion 221 opposite to the touch sensing portion 21 . Further, opposite sides of the first extension portion 221 are respectively adjacent to the touch sensing portion 21 and the second extension portion 222 . Likewise, the first extension portion 221 protrudes from a position corresponding to the wire outlet O to one side of the touch sensing portion 21 .

In addition, the aforementioned second leads 32 (as shown in FIG. 1A ) are further divided into a third sub-lead 321 and a fourth sub-lead 322 in this embodiment. A plurality of third sub-leads 321 are disposed on the first extension portion 221 , and a plurality of fourth sub-leads 322 are disposed on the second extension portion 222 and are electrically connected to corresponding third sub-leads 321 . In this embodiment, the plurality of fourth sub-leads 322 may be formed by extending the plurality of third sub-leads 321 from the first extension part 221 to the second extension part 222. The material forms a plurality of third sub-leads 321 and a plurality of fourth sub-leads 322 to reduce the process steps and increase the accuracy of circuit layout. The material of the third sub-lead 321 and the fourth sub-lead 322 may be the material of the second lead 32 in the foregoing embodiment.

In this embodiment, the shape of the first extending portion 221 is substantially trapezoidal, and the shape of the second extending portion 222 is substantially rectangular. In detail, the first extending portion 221 is trapezoidal with a wider upper side and a narrower lower side. The line width of the plurality of third sub-leads 321 can be designed to be greater than the line width of the plurality of first leads 31 . And in particular, the line width of the third sub-leads 321 can also be designed to conform to the shape of the first extension portion 221 , for example, gradually narrowing from the peripheral region 212 to the second extension portion 222 . For example, the line width of the third sub-lead 321 adjacent to the peripheral region 212 may be, for example, 70 μm to 500 μm, and the line width of the third sub-lead 321 adjacent to the second extension portion 222 may be, for example, 15 μm. microns to 30 microns. Under this design, when the user folds the first extension portion 221 and the second extension portion 222 under the touch sensing portion 21 , since the line width of the third sub-lead 321 adjacent to the peripheral region 212 is wider, Therefore, the third sub-lead 321 at the folded position is less likely to be broken, and at the same time, it can prevent the circuit from being broken during the plugging process and causing an open circuit.

The line width of the plurality of fourth sub-leads 322 located in the second extension 222 is similar to the line width of the third sub-leads 321 adjacent to the second extension 222, which may be, for example, 15 microns to 30 microns. In other words, the line width of the fourth sub-lead 322 is narrower than the line width of the third sub-lead 321, so that the second extension 222 can be maintained as a rectangular shape with a small area, so as to save substrate material and avoid extension parts. 22 oversized effects.

Next, FIG. 2B is an enlarged view of the region Z2 shown in FIG. 2A . Please refer to FIG. 2A and FIG. 2B at the same time. There is a notch F at the junction, and an angle A is formed between the extension line L of the side 21b and the side 221b. Since the first extension 221 is a trapezoid with a wider upper side and a narrower lower side, the included angle A forms an obtuse angle . An obtuse angle (angle A) is formed between the touch sensing part 21 and the first extension part 221, so that the touch panel 1a can be folded back to the touch sensing part 21 at the first extension part 221 and the second extension part 222. When it is down, it has a better stress dispersion effect.

Fig. 3 is a top view of a touch panel 1b according to another preferred embodiment of the present utility model, and only the differences from the touch panel 1 shown in Fig. 1A will be described below, and for the rest of the same content, please refer to the aforementioned implementation example. Please refer to FIG. 3 , in the touch panel 1 b of the present embodiment, the distance between the second leads 32 is wider as it is closer to the overlapping region R2 . In other words, the distance between the second leads 32 adjacent to the peripheral region 212 is narrower, and the second leads 32 at this position have a higher line density. In this embodiment, since the distribution of the second leads 32 adjacent to the peripheral area 212 is concentrated, that is to say, the second leads 32 near the outer side are farther away from the notch F, so if the extension part 22 of the flexible substrate 2 is When the notch F is torn due to bending, the second lead 32 is less likely to be damaged.

FIG. 4A is a top view of a touch panel 1c according to yet another preferred embodiment of the present invention, and FIG. 4B is a cross-sectional view along the dotted line BB' shown in FIG. 4A. The following describes only the differences between the touch panel 1c of this embodiment and the touch panel 1b shown in FIG.

Please refer to FIG. 4A and FIG. 4B at the same time, the touch panel 1c also includes a protective layer 5, and the protective layer 5 is arranged on the lead layer 3. Further, the protective layer 5 is arranged on a layer of the lead layer 3 relative to the flexible substrate 2. side. Firstly, the protection layer 5 is disposed at a position corresponding to at least part of the peripheral area 212 to cover at least part of the first lead 31 located in the peripheral area 212 . In addition, part of the protective layer 5 is also disposed on the lead region R1 corresponding to the extension portion 22 to cover at least part of the second lead 32 located in the lead region R1. The main function of the protective layer 5 is to protect the plurality of first leads 31 and the plurality of second leads 32, to isolate the plurality of first leads 31 and the plurality of second leads 32 from the air, and to prevent the electrical conductivity of the leads from being reduced due to oxidation. problem, it can further prevent the plurality of first lead wires 31 and the plurality of second lead wires 32 from cracking during use. And the material of protective layer 5 can be transparent or opaque insulating material, especially refers to the insulating ink material of bending resistance here, in addition, the material of protective layer 5 also can be polyimide (Polyimide; PI), silicon nitride (Si3N4) or silicon dioxide (SiO2), etc., the utility model is not limited to the above-mentioned materials, which can be selected according to actual product requirements. In addition, the thickness of the protection layer 5 is preferably about 5 microns to 25 microns, and the present invention is not limited to this thickness.

Specifically stated here, the protective layer 5 may be a single-layer or multi-layer structure. In addition, although the protective layer 5 in this embodiment is formed on the lead layer 3 in a manner of connecting the entire layer, in other embodiments, the protective layer 5 may also be formed in a manner of not connecting the entire layer.

On the other hand, the touch panel 1 c of this embodiment further includes a strengthening layer 6 , and the strengthening layer 6 is disposed under the flexible substrate 2 . In other words, the reinforcement layer 6 and the lead layer 3 are respectively disposed on opposite sides of the flexible substrate 2 . The material of the reinforcing layer 6 can be, for example, polyimide, acrylic resin, epoxy resin, or a combination of the above, and polyimide is particularly used as an example here. In this embodiment, the location of the strengthening layer 6 corresponds to at least part of the overlapping region R2 . Of course, the strengthening layer 6 may also correspond to part of the overlapping region R2 and part of the lead region R1 at the same time. The strengthening layer 6 is mainly used to strengthen the strength of the corresponding area. Specifically, since the thickness of the flexible substrate 2 and the lead layer 3 above it is relatively thin, it will make it difficult for the extension 22 to insert (or pull out) the connector at the rear end, so this area is reinforced through the strengthening layer 6 , can make the process of inserting (or pulling out) the extension part 22 into the connector more smoothly, and can also prevent the second lead wire 32 and the pin 4 from being broken due to the overall thickness being too soft and thin during the process of refolding. The thickness of the reinforcing layer 6 can be about 25 microns to about 250 microns, and the present invention is not limited to this thickness, and it can be adjusted according to different product requirements, such as different connectors on the rear control board.

It should be noted here that although the touch panel 1c in FIG. 4A and FIG. 4B is an example where the protective layer 5 and the strengthening layer 6 are provided on the touch panel 1b shown in FIG. 3 , in other embodiments, the protective The layer 5 and the strengthening layer 6 can also be disposed on the touch panel 1 in FIG. 1A or the touch panel 1a in FIG. 2A , and the relative positions and materials can refer to the contents of the foregoing embodiments, and will not be repeated here.

To sum up, the present invention provides a touch panel, which integrates the known substrate with touch sensing circuit (touch sensing part) and the known flexible printed circuit board (extension part) on the same substrate to achieve different Need to carry out bonding steps, improve yield rate, reduce material cost and shorten production time and other functions.

In addition, there is a notch at the intersection of one side of the touch sensing part and one side of the extension part, so that when the extension part is folded back to the bottom of the touch sensing part, the notch can disperse the stress generated by the inflection, In order to avoid breakage between the touch sensing part and the extension part due to reflexion, the use reliability of the touch panel is improved.

In addition, using nano-silver, nano-copper alloy, carbon nanotubes, or the above-mentioned combination as the material of the lead layer, using the flexible characteristics of the above-mentioned materials, further avoids when the extension part is folded under the touch-sensing part. When the lead layer is broken, the risk of damage to the touch panel is reduced.

The above description is only exemplary, not restrictive. Any equivalent modifications or changes made without departing from the spirit and scope of the present invention shall be included in the appended claims.

Claims (29)

1. A touch panel, characterized in that, comprising: A flexible substrate has a touch sensing part and an extension part, the extension part protrudes from one side of the touch sensing part, and the touch sensing part is divided into a touch sensing area and a periphery District; and A lead layer, arranged on the flexible substrate, the lead layer has a plurality of first leads connected to the touch sensing area and a plurality of second leads connected to a control board, the plurality of first leads and The plurality of second leads are electrically connected at the intersection of the touch sensing part and the extension part, Wherein the intersection of the touch sensing part and the extension part has at least one notch. 2. The touch panel according to claim 1, wherein the flexible substrate has two notches. 3. The touch panel according to claim 2, wherein the peripheral area has a wire outlet, the extension part corresponds to the position of the wire outlet, and the two notches are located at the wire outlet respectively. opposite sides of the mouth. 4. The touch panel according to claim 3, wherein the plurality of second lead wires are the plurality of first lead wires extending from the peripheral area and passing through the outlet opening and then extending toward the Formed by extension. 5. The touch panel according to claim 1, wherein the width of the notch is greater than or equal to 0.5 mm, and the depth of the notch is greater than or equal to 1 mm. 6 . The touch panel according to claim 1 , wherein the shape of the extending portion is square, rectangular, or trapezoidal. 7. The touch panel according to claim 1, wherein the extension part further comprises a first extension part and a second extension part, and the first extension part protrudes from the touch panel along an axial direction. One side of the touch sensing part, the second extending part protrudes from the side of the first extending part opposite to the touch sensing part along the axial direction. 8 . The touch panel according to claim 7 , wherein the shape of the first extending portion is trapezoidal. 9. The touch panel according to claim 7, wherein each of the plurality of second leads is formed by a third sub-lead and a fourth sub-lead, and the third sub-lead is arranged on the The first extension part is electrically connected to one of the first leads, and the fourth sub-lead is disposed on the second extension part and electrically connected to the third sub-lead. 10 . The touch panel according to claim 9 , wherein the line width of the third sub-lead is larger than the line width of the first lead. 11 . 11 . The touch panel according to claim 9 , wherein the line width of the third sub-lead gradually becomes narrower from the peripheral region to the second extension portion. 12 . 12. The touch panel according to claim 1, further comprising: A protective layer is disposed on the lead layer and corresponds to at least part of the peripheral area, so as to cover at least part of the plurality of first lead wires. 13. The touch panel according to claim 1, wherein the extension portion further distinguishes a lead area and an overlapping area, the overlapping area is adjacent to the lead area, and the overlapping area There are multiple pins, and the multiple second leads are arranged in the lead area and electrically connected to the multiple pins. 14 . The touch panel according to claim 13 , wherein distances between the plurality of second leads are wider closer to the overlapping area. 15 . 15. The touch panel according to claim 13, wherein the touch panel further comprises: A protection layer is disposed on the lead layer and corresponding to the position of the lead region, so as to cover at least part of the plurality of second leads. 16. The touch panel according to claim 12 or 15, characterized in that, the material of the protective layer is an insulating ink material which is resistant to bending. 17. The touch panel according to claim 13, further comprising: A strengthening layer is respectively arranged on opposite sides of the flexible substrate with the lead layer, and the position of the strengthening layer at least corresponds to the position of the overlapping area. 18 . The touch panel according to claim 17 , wherein the strengthening layer is made of polyimide. 19. The touch panel according to claim 1, wherein the material of the flexible substrate comprises polyethylene terephthalate, polycarbonate, cycloolefin polymer, cellulose triacetate, polyether Sulfone, polyolefin, polymethyl methacrylate, or a combination of the above. 20 . The touch panel according to claim 1 , wherein the material of the wiring layer comprises nano-silver, nano-copper alloy, carbon nanotube, or a combination thereof. 21 . 21. A touch panel, characterized in that it comprises: A flexible substrate has a touch sensing part and an extension part, the extension part protrudes from one side of the touch sensing part, and the touch sensing part is divided into a touch sensing area and a periphery District; and A lead layer, arranged on the flexible substrate, the lead layer has a plurality of first leads connected to the touch-sensitive side area and a plurality of second leads connected to a control board, the plurality of first leads and The plurality of second leads are electrically connected at the intersection of the touch sensing part and the extension part, Wherein the plurality of second lead wires are electrically connected to the control board at one side of the extension part. 22 . The touch panel according to claim 21 , wherein the material of the wiring layer comprises nano-silver, nano-copper alloy, carbon nanotubes, or a combination thereof. 23 . The touch panel according to claim 21 , wherein at least one notch is formed at the intersection of the touch sensing part and the extension part. 24. The touch panel according to claim 21, wherein the peripheral area has a wire outlet, the extension part corresponds to the position of the wire outlet, and the opposite sides of the wire outlet have respectively a gap. 25. The touch panel according to claim 23, wherein the width of the notch is greater than or equal to 0.5 mm, and the depth of the notch is greater than or equal to 1 mm. 26. The touch panel according to claim 21, wherein the shape of the extension part is square, rectangular or trapezoidal. 27. The touch panel according to claim 21, wherein the extension portion further distinguishes a lead area and an overlapping area, the overlapping area is adjacent to the lead area, and the overlapping area There are multiple pins, and the multiple second leads are arranged in the lead area and electrically connected to the multiple pins. 28. The touch panel according to claim 27, further comprising: A protective layer is disposed on the lead layer and corresponds to the position of the lead region and at least part of the peripheral region, so as to cover at least part of the plurality of first leads and the plurality of second leads. 29. The touch panel according to claim 27, further comprising: A strengthening layer is respectively arranged on opposite sides of the flexible substrate with the lead layer, and the position of the strengthening layer at least corresponds to the position of the overlapping area.