TW201409317A - Touch panel, electronic device thereof, and manufacturing method thereof - Google Patents

Abstract

A touch panel structure includes an insulating substrate, a touch sensing layer, a metal trace, a protective layer, and a metal grounding layer. The insulating substrate has a touch region and a side region surrounding the touch region. The touch sensing layer is located on the touch region of the insulating substrate and part of the side region. The metal trace is located in the side region of the insulating substrate, and electrically connected to the touch sensing layer. The protective layer at least covers the metal trace. The metal grounding layer is located on the protective layer, and the scope of the metal grounding layer covers the scope of the metal trace.

Description

Touch panel, electronic device thereof and method of manufacturing same

The present invention relates to a touch panel, and more particularly to a touch panel having a grounded metal layer, an electronic device thereof, and a method of fabricating the same.

The touch panel is an input device for the operator to directly operate. The types of touch panels are: capacitive, resistive, electromagnetic, optical and other touch panels, of which capacitive touch panels are widely used. The capacitive touch panel is mainly formed by bonding a touch glass substrate with a sensing layer on the protective glass and the touch panel. When the driving signal is applied to the sensing layer of the capacitive touch panel, if the touch panel is touched, the touch is touched. The position of the sensing layer corresponding to the touch position on the panel produces an electrical signal change.

Since the operator often operates the touch panel through a finger, and the touch panel has a sensing layer that generates a change in electrical signals, the human body transfers some of the static electricity to the touch panel, so that the touch panel can easily receive static electricity from the human body. In addition, static electricity generated in the air is likely to accumulate in the touch panel due to static electricity generated in the atmosphere. The static electricity accumulated in the touch panel is likely to cause the touch panel to fail or be misjudged during the discharge process.

At the same time, in recent years, the touch panel has been developed in a light and thin direction. The capacitive touch panel manufacturer omits a touch substrate carrying the sensing layer, and the sensing layer is directly formed on the protective glass to form an integrated touch structure. Capacitive touch panel. The capacitive touch panel of the integrated touch structure is attached to the display device. Since there is no touch substrate, the peripheral circuit (which is made of metal material) is easily exposed, and is electrostatically broken by the human body or the external environment, thereby causing contact. The control panel is invalid. Although the touch panel has a protective layer of insulation, The protective layer still cannot achieve good electrostatic protection.

In view of this, the present invention provides a touch panel having a good electrostatic protection effect to derive static electricity accumulated in the touch panel.

The embodiment of the invention provides a touch panel, which comprises an insulating substrate, a touch sensing layer, a peripheral line, a protective layer and a grounding metal layer. The insulating substrate has a touch area and a peripheral area surrounding the touch area. The touch sensing layer is located in the touch area and a part of the peripheral area of the insulating substrate. The peripheral circuit is located in a peripheral region of the insulating substrate and is electrically connected to the touch sensing layer. The protective layer covers at least the surrounding lines. The grounding metal layer is above the protective layer, and the range of the grounded metal layer covers the range of the surrounding lines.

Further, the protective layer covers the touch sensing layer and the peripheral line in a whole layer; or the protective layer is annular to cover at least the surrounding line.

Further, the touch panel further includes a first light shielding layer, the first light shielding layer is located in the peripheral region of the insulating substrate, and the peripheral circuit is located above the first light shielding layer.

Further, wherein the grounded metal layer is a mesh structure.

Further, the touch panel further includes a second light shielding layer sandwiched between the ground metal layer and the insulating layer, and the range covers the range of the peripheral region.

Further, the touch panel further includes a flexible printed circuit, the flexible printed circuit has at least one first ground pin, and the first ground pin is electrically connected to the ground metal layer. The first grounding pin is also electrically connected to at least one grounding conductor of the peripheral circuit.

Further, wherein the flexible printed circuit further has at least one second connection a ground pin, and the second ground pin is electrically connected to the at least one ground wire of the peripheral line.

Further, the grounded metal layer is a printed silver paste.

Further, the touch panel further includes a flat layer for forming a touch sensing layer within the touch area of the insulating substrate.

The embodiment of the invention provides an electronic device, which comprises a touch panel, a liquid crystal display module and a circuit board, wherein the liquid crystal display module is pasted to the touch panel through an optical adhesive. The touch panel includes an insulating substrate, a touch sensing layer, a peripheral line, a protective layer, a grounding metal layer, and a first flexible printed circuit (FPC). The insulating substrate has a touch area and a peripheral area surrounding the touch area. The touch sensing layer is located in the touch area and a part of the peripheral area of the insulating substrate. The peripheral line is located on the peripheral area of the insulating substrate and electrically connected to the touch sensing layer. The protective layer covers at least the surrounding lines. The ground metal layer is above the insulating layer, and the range of the ground metal layer covers the range of the surrounding lines. The liquid crystal display module has a second flexible printed circuit. The first flexible printed circuit is electrically connected to the peripheral circuit, and has a first grounding pin electrically connected to the grounding metal layer. The circuit board includes at least one wafer electrically connected to the touch panel and the liquid crystal display module through the first and second flexible printed circuits.

Further, the protective layer covers the touch sensing layer and the peripheral line in a whole layer; or the protective layer is annular to cover at least the surrounding line.

Further, the electronic device further includes a first light shielding layer, the first light shielding layer is located in the peripheral region of the insulating substrate, and the peripheral circuit is located above the first light shielding layer.

Further, wherein the grounded metal layer is a mesh structure.

Further, the electronic device further includes a second light shielding layer sandwiched between the ground metal layer and the insulating layer, and the range covers the range of the peripheral region.

Further, the electronic device further includes a flexible printed circuit having at least one first grounding pin, and the first grounding pin is electrically connected to the grounding metal layer. The first grounding pin is also electrically connected to at least one grounding conductor of the peripheral circuit.

Further, the flexible printed circuit further has at least one second grounding pin, and the second grounding pin is electrically connected to the at least one grounding conductor of the peripheral line.

Further, the grounded metal layer is a printed silver paste.

Further, the electronic device further includes a flat layer for forming a touch sensing layer within the touch area of the insulating substrate.

The embodiment of the invention provides a method for manufacturing a touch panel, and the steps of the manufacturing method are as follows. An insulating substrate is provided, and the touch area is divided on the insulating substrate and the peripheral area surrounding the touch area. Forming a touch sensing layer on the touch area and a portion of the peripheral area of the insulating substrate. A peripheral line electrically connected to the touch sensing layer is formed in a peripheral region of the insulating substrate. A protective layer covering at least the peripheral lines is formed, and the range of the grounded metal layer covers a range of the grounded metal layers in the range of the peripheral lines.

Further, the protective layer covers the touch sensing layer and the peripheral line in a whole layer; or the protective layer is annular to cover at least the surrounding line.

Further, the method for manufacturing the touch panel further includes forming a first light shielding layer located in the peripheral region of the insulating substrate, and the peripheral circuit is located above the first light shielding layer.

Further, the grounded metal layer is a mesh structure.

Further, the method for manufacturing the touch panel further includes forming a second light shielding layer sandwiched between the ground metal layer and the protective layer, wherein a range of the second light shielding layer covers a range of the non-display area.

Further, the method for manufacturing the touch panel further includes providing a flexible printed circuit to electrically connect the at least one first grounding pin of the flexible printed circuit to the grounding metal layer. Further, the method for manufacturing the touch panel further includes forming a flat layer on the display area, wherein the flat layer is configured to form the touch sensing layer within the touch area of the insulating substrate.

In summary, the touch panel has a grounded metal layer, and the grounded metal layer can derive internal components from the touch panel or static electricity generated by the human body. In addition, the ground layer can shield the external electromagnetic wave received by the capacitive touch panel during use, so the touch panel has both electrostatic protection capability and electromagnetic wave interference.

The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.

1 and FIG. 2A, FIG. 1 is a plan perspective view of a touch panel according to an embodiment of the present invention, and FIG. 2A is a cross-sectional view of the touch panel according to an embodiment of the present invention. 2A is a cross-sectional view taken along line AA of FIG. 1. The touch panel 100 includes an insulating substrate 110 , a first light shielding layer 120 , a peripheral line 140 , a touch sensing layer 150 , a protective layer 160 , a ground metal layer 170 , and a flexible printed circuit 190 .

The insulating substrate 110 has a touch area M1 and a peripheral area M2, wherein the circumference The edge area M2 surrounds the touch area M1. The material of the insulating substrate 110 may be glass, plastic or quartz, however, the invention is not limited thereto. In the embodiment of the present invention, the touch panel 100 is a capacitive touch panel with an integrated touch structure, and thus the insulating substrate 110 serves as a touch operation surface at the same time.

The first light shielding layer 120 is located in the peripheral area M2, and its main purpose is to shield light and decoration, so that it can be used to prevent the image from being affected by the leakage of incident light. In addition, the use of the first light shielding layer 120 can also increase the color contrast of the image. The material used for the first light shielding layer 120 may be a black resin, a black photoresist material, or a high insulating ink having a low dielectric constant, and the invention is not limited thereto.

The touch sensing layer 150 is located in the touch area M1 and a portion of the peripheral area M2 for sensing changes of a plurality of electrical signals generated thereon to obtain an electrical signal change as a sensing signal. The touch sensing layer 150 includes a first pattern layer 151, an insulating layer 152, and a second pattern layer 153 all located in the touch area M1, and the first pattern layer 151 and the second pattern layer 153 are both conductive materials. The materials of the first pattern layer 151 and the second pattern layer 153 are, for example, Indium Tin Oxides (ITO), Indium Zinc Oxide (IZO), and Aluminum Zinc Oxide (Zinc oxide doping 3 oxidation 2). Aluminium, AZO) or metal. The above metal is, for example, gold, silver or copper. Further, the material of the insulating layer 152 is, for example, a resin or a polyimide. In summary, the materials of the first pattern layer 151, the insulating layer 152, and the second pattern layer 153 are not intended to limit the present invention.

The first pattern layer 151 has a plurality of parallel first axial sensing electrode axes (eg, X-axis sensing electrode axes), and the second pattern layer 153 has a plurality of parallel second axial sensing electrode axes (eg, Y-axis sensing) Electrode shaft), insulating layer 152 The first and second axial sensing electrode shafts are electrically insulated. A mutual capacitance may be formed at an intersection of the first axial electrode axis and the second axial electrode axis, and a controller (not shown) may further calculate the contact position by receiving a mutual capacitance signal change of the touch sensing layer 150. It should be noted that the above embodiments are not intended to limit the present invention. In one embodiment, the first pattern layer 151 has a plurality of parallel first axial sensing electrode axes (eg, X-axis sensing electrode axes) and a plurality of second axial electrodes arranged in a matrix but spaced apart from each other ( For example, a Y-axis sensing electrode), the second pattern layer 153 acts as a bridging layer to electrically connect the plurality of second axial electrodes along the second axis to each other to form a plurality of parallel second axes Electrode shaft. In addition, in other embodiments, the touch sensing layer 150 may also have only one layer of a pattern.

The peripheral line 140 is electrically connected to the touch sensing layer 150 , which is formed on the first light shielding layer 120 and located in the peripheral area M2 . The peripheral line 140 is configured to transmit a sensing signal generated by the touch sensing layer 150, such as a mutual capacitance signal, to the controller (not shown) through the flexible printed circuit 190. The peripheral line 140 is made of a conductive material such as indium tin oxide, indium zinc oxide, aluminum zinc oxide or metal. The peripheral line 140 can be formed by etching or printing, but the invention is not limited thereto. It should be noted that, in other embodiments, the touch sensing layer 150 extends to the peripheral region M2 and is electrically connected to the peripheral line 140 on the first shielding layer 120.

The protective layer 160 can be overlaid on the touch sensing layer 150 and the peripheral line 140 to protect the touch sensing layer 150 and the peripheral line 140 from oxidation or scratching. Therefore, the protective layer 160 can be It is for example a passivation. The protective layer 160 may also be annular, covering at least the peripheral line 140. The protective layer 160 may be an insulating layer for electrically isolating the peripheral line 140 from the grounded metal layer 170. The protective layer 160 may be made of tantalum nitride (S ₃ N ₄ ) or cerium oxide (SiO ₂ ) by vapor deposition, but the invention is not limited thereto.

The ground metal layer 170 is located on the protective layer 160, and the formation range of the ground metal layer 170 covers the range of the peripheral line 140, and even the formation range of the ground metal layer 170 covers the range of the peripheral region M2. The grounding metal layer 170 is electrically connected to the first grounding pin of the flexible printed circuit 190, so that the grounded metal layer 170 can send the accumulated static electricity to the ground through the flexible printed circuit 190. Therefore, the design of the grounding metal layer 170 can make the touch panel 100 have an electrostatic discharge protection capability and prevent the touch panel or other components from being damaged by electrostatic discharge. In addition, the touch panel 100 is susceptible to external electromagnetic interference (EMI) during use, and generates an error signal. Even a serious interference may cause the entire touch panel 100 to be unusable, and the ground metal layer 170 may also function here. The effect of shielding electromagnetic waves is shielded, so that the touch panel 100 can be used normally.

In this embodiment, the material of the ground metal layer 170 is metal. In the metal, since the printed silver paste has the advantages of good conductivity and good resistance, preferably, the grounded metal layer 170 may be composed of printed silver paste. In this embodiment, the shape of the ground metal layer 170 may be a mesh structure. In addition to saving material to reduce manufacturing cost, the grounded metal layer 170 of the mesh structure allows the product manufacturer or the repairer to easily check whether the peripheral circuit 140 has an open circuit and a short circuit through an electron microscope. In the embodiment of the present invention, The mesh size of the mesh structure may be, for example, a square having a side length of 0.5 cm.

The flexible printed circuit 190 has a first ground pin and a second ground pin. The first ground pin can be electrically connected to the ground metal layer 170, and the second ground pin is electrically connected to the plurality of ground lines 140 or one ground. wire. In addition, the flexible printed circuit 190 has a sensing signal pin and a driving signal pin, the sensing signal pin is used to receive the sensing signal of the touch sensing layer 150, and the driving signal pin is used for transmitting the driving. The signal is applied to the touch sensing layer 150.

In addition, in other embodiments, the flexible printed circuit 190 has only a first ground pin, and the first ground pin is electrically connected to the ground metal layer 170 and the plurality of ground wires of the peripheral line 140 at the same time. It should be noted that, in consideration of the electrostatic discharge protection capability of the touch panel 100, in the above embodiment, in the case where the flexible printed circuit 190 uses the first and second ground pins, it will be more than the flexible printed circuit 190. The effect of using the first ground pin is good.

In addition, the flexible printed circuit 190 may be connected to the ground metal layer 170 unilaterally through a first ground pin, or may be bilaterally connected to the ground metal layer 170 through the two first ground pins. In summary, the manner in which the flexible printed circuit 190 is coupled to the grounded metal layer 170 is not intended to limit the invention.

In this case, the touch panel 100 can be a transparent insulating substrate, and the touch area M1 and the peripheral area M2 can be used for the touch panel. Define the display area and the non-display area. In addition, when the touch panel 100 is not combined with the display panel, the insulating substrate 110 may be a non-transparent insulating substrate, and the first light shielding layer 120 may be removed from the touch panel 100. At this time, the peripheral line 140 is directly located on the insulating substrate. Above the peripheral area M2 of 110.

Please refer to FIG. 2B. FIG. 2B is a cross-sectional view of a touch panel according to another embodiment of the present invention. In this embodiment, the touch panel 100' is substantially the same as the touch panel 100 of the previous embodiment, except that the touch panel 100' is more There is a flat layer 130. The flat layer 130 is located in the touch area M1 and is disposed between the touch sensing layer 150 and the insulating substrate 110. The flat layer 130 can be used to form the touch sensing layer 150 on the touch area M1 of the insulating substrate 110. In addition, the flat layer 130 can also be used to prevent light scattering from the liquid crystal display module, thereby improving the performance of the image. The flat layer 130 may be a smooth layer formed of a polymer, such as polyimide (PI), and the present invention does not limit the material of the flat layer 130.

Referring to FIG. 2C, FIG. 2C is a cross-sectional view of a touch panel according to still another embodiment of the present invention. The touch panel 100 ′′ structure of FIG. 2C further includes a second light shielding layer 180. The second light shielding layer 180 is located between the ground metal layer 170 and the protective layer 160, wherein the second light shielding layer is disposed. The range of the layer 180 covers the range of the peripheral region M2. The main use of the second light shielding layer 180 is light shielding and decoration, which can be used to enhance the prevention of leakage of incident light and thus affect the performance of the image, and thus the material used for the second light shielding layer 180 It may be a black resin, a black photoresist material or a high insulating ink with a low dielectric constant, which is produced by a coating or sputtering process.

It should be noted that if the material used for the second light shielding layer 180 of the touch panel 100 ′ is a high insulating ink having a low dielectric constant, the ground metal layer 170 and the peripheral line 140 can be electrically isolated. The electrical interference between the peripheral line 140 and the grounded metal layer 170 can be further reduced, so that the electrostatic discharge protection capability of the touch panel structure 100" can be improved. In addition, as described above, the flat layer 130 of FIG. 2C can also be removed, that is, the presence or absence of the flat layer 130 is not intended to limit the second light shielding layer 180.

In addition, as shown in FIG. 2C, the second light shielding layer 180 can be routed to the periphery The 140 extends and surrounds the outer four sides of the perimeter line 140. Accordingly, the second light shielding layer 180 can also protect the outer portion of the peripheral line 140 that is originally exposed to the outside, thereby avoiding damage or scratching of the peripheral line 140.

Next, please refer to FIG. 3A to FIG. 3E and FIG. 2A in sequence. FIG. 3A to FIG. 3E are respectively cross-sectional views of the semi-finished product formed by the touch panel 100 of FIG. 2A in each step. Referring to FIG. 3A, an insulating substrate 110 is first provided, and a touch area M1 and a peripheral area M2 surrounding the touch area M1 are divided on the insulating substrate 110. Next, the first light shielding layer 120 is formed in the peripheral region M2 of the insulating substrate 110. The first light shielding layer 120 is a black photoresist material and is applied to the peripheral region M2 via a photolithography process. Then, after the pre-bake and exposure steps are performed, the black photoresist material further forms a black frame, so that the first light-shielding layer 120 has a light-shielding effect. In addition, the first light shielding layer 120 may be a high insulating ink having a low dielectric constant, which is formed in the peripheral region M2 by screen printing, or the first light shielding layer 120 may also be chromium, formed by a sputtering process. On the surrounding area M2. In summary, the present invention does not limit the manner in which the first light shielding layer 120 is formed.

Referring to FIG. 3B , a touch sensing layer 150 is formed on the insulating substrate 110 , and is located in the touch area M1 and a portion of the peripheral area M2 . The touch sensing layer 150 includes a first pattern layer 151 , an insulating layer 152 , and The second pattern layer 153. In more detail, the first pattern layer 151 is formed first, then the insulating layer 152 is formed over the first pattern layer 151, and then the second pattern layer 153 is formed over the insulating layer 152.

Referring to FIG. 3C , the peripheral line 140 is formed on the first light shielding layer 120 and surrounds the touch sensing layer 150 . The peripheral line 140 has at least one grounding conductor. The manner of forming the peripheral line 140 may be etching, printing, or wire bonding, but the invention is not limited thereto.

Referring to FIG. 3D , a protective layer 160 is formed over the touch sensing layer 150 and the peripheral line 140 . In addition, the protective layer 160 may be formed by a vapor deposition method, but the invention is not limited thereto. The protective layer 160 can be overlaid on the touch sensing layer 150 and the peripheral line 140 to protect the touch sensing layer 150 and the peripheral line 140 from oxidation or scratching. Therefore, the protective layer 160 can be It is for example a passivation. The protective layer 160 may also be annular, covering at least the peripheral line 140. The protective layer 160 may be an insulating layer for electrically isolating the peripheral line 140 from the grounded metal layer 170.

Referring to FIG. 3E, a ground metal layer 170 is formed over the protective layer 160, and the range of the ground metal layer 170 covers the range of the peripheral line 140, and may even cover the range of the peripheral region M2. In addition, in the embodiment of the present invention, the ground metal layer 170 is a silver paste and is formed on the protective layer 160 by printing. However, the material and manner of fabrication of the grounded metal layer 170 are merely illustrative and are not limiting of the invention.

It should be noted that in other embodiments of the present invention, the grounded metal layer 170 is a mesh structure, and the grounded metal layer 170 of the mesh structure facilitates maintenance personnel or manufacturers to check whether there is an open circuit and a short circuit between the peripheral lines 140. . In addition, the ground metal layer 170 may also be a thin film structure. In summary, the present invention does not limit the structure of the ground metal layer 170.

With continued reference to FIG. 2A, a flexible printed circuit 190 is formed that is bilaterally or unilaterally coupled to the grounded metal layer 170. It should be noted that the flexible printed circuit 190 has a first ground pin and a second ground pin. The first ground pin can be electrically connected to the ground metal layer 170, and the second ground pin is electrically connected to the peripheral line 140. Multiple or one grounding conductor. In addition to this, soft print The brush circuit 190 further has a sensing signal pin and a driving signal pin, the sensing signal pin is used to receive the sensing signal of the touch sensing layer 150, and the driving signal pin is used to transmit the driving signal to the touch sensing. Layer 150. In addition, in other embodiments, the flexible printed circuit 190 has only a first ground pin, and the first ground pin is electrically connected to the ground metal layer 170 and the plurality of ground wires of the peripheral line 140 at the same time. In summary, the invention is not limited thereto.

In addition, when the touch panel 100 further has a flat layer between the insulating substrate 110 and the touch sensing layer 150, a flat layer 130 may be formed between the display regions M1 of the insulating substrate 110 between FIG. 3A and FIG. 3B. The flat layer is used to form the touch sensing layer 150 on the touch area M1 of the insulating substrate 110. It should be noted that the thickness of the flat layer is substantially the same as the thickness of the first light shielding layer 120, so that the subsequent process can be smoothly performed. In addition, the flat layer is formed of a polymer. Accordingly, the flat layer can be formed on the insulating substrate 110 by vapor deposition and located in the touch region M1, but the present invention does not limit the manner in which the flat layer is formed. At the same time, the touch sensing layer 150 is formed on the touch area M1 through the flat layer.

In addition, when the touch panel 100 further has a second light shielding layer between the ground metal layer 170 and the protective layer 160, formed on the protective layer 160 between FIG. 3D and FIG. E, and the second light shielding layer 180 is formed. The range covers the range of the surrounding area M2. The second light shielding layer 180 may be a black photoresist material, coated on the peripheral region M2 via a photolithography process, and then subjected to a pre-baking and exposure step to form a black frame, so that the second light shielding layer 180 can be used for shielding. In addition, the second light shielding layer 180 may also be a high insulating ink having a low dielectric constant and formed on the peripheral region M2 by screen printing. Or the second light shielding layer 180 may also be chrome, formed in the peripheral region M2 by a sputtering process. on. In summary, the present invention does not limit the manner in which the second light shielding layer 180 is formed.

Please refer to FIG. 4, which is a schematic diagram of an electronic device according to an embodiment of the present invention. The electronic device 400 has a touch panel 410, a liquid crystal display module 420, and a circuit board 430. The touch panel 410 has a flexible printed circuit 411. The touch panel 410 can be the touch panel 100, the touch panel 100' or the touch panel 100. The liquid crystal display module 420 is adhered to the optical adhesive. The touch panel 410 has a flexible printed circuit 421. The circuit board 430 includes a chip 431 and a wafer 432 which are electrically connected to the touch panel 410 and the liquid crystal display module 420 through the flexible printed circuit 411 and the flexible printed circuit 421, respectively. The number of wafers of 430 is not intended to limit the present invention, and the wafer 432 or the wafer 431 can be electrically connected to the touch panel 410 and the liquid crystal display module 420 at the same time.

In summary, the touch panel provided by the embodiment of the present invention has a grounding metal layer, and the grounded metal layer can discharge static electricity accumulated from internal components of the touch panel. In addition, the ground layer can also shield the capacitive touch panel from external electromagnetic interference during use, so the touch panel can have electrostatic discharge protection capability and can shield electromagnetic wave interference.

In addition, in one embodiment of the present invention, the grounding metal layer may be a printed silver paste of a mesh structure to reduce the cost of the touch panel, and provide a repairer or a manufacturer to check whether the peripheral circuit has a presence or not. Open or short circuit problem. In addition, in another embodiment of the present invention, the touch panel further has a second light shielding layer, and the second light shielding layer may be a high insulating ink having a low dielectric constant to increase the electrostatic protection capability of the touch panel.

The above is only an embodiment of the present invention, and is not intended to limit the scope of the invention. Any skilled person skilled in the art, without departing from the spirit and scope of the present invention, will be replaced by an equivalent replacement of the modifiers and retouchings. Within the scope of patent protection of the present invention.

100, 100', 100", 410‧‧‧ touch panels

110‧‧‧Insert substrate

120‧‧‧ first light shielding layer

130‧‧‧flat layer

140‧‧‧ peripheral lines

150‧‧‧ touch sensing layer

151‧‧‧First pattern layer

152‧‧‧Insulation

153‧‧‧Second pattern layer

160‧‧‧Protective layer

170‧‧‧Grounded metal layer

180‧‧‧Second light shielding layer

190, 411, 421‧‧‧ Flexible printed circuit

400‧‧‧Electronic devices

420‧‧‧LCD module

430‧‧‧ circuit board

431, 432‧‧‧ wafer

M1‧‧‧ touch area

M2‧‧‧ surrounding area

FIG. 1 is a plan perspective view of a touch panel according to an embodiment of the present invention.

2A is a cross-sectional view of a touch panel according to an embodiment of the present invention.

2B is a cross-sectional view of a touch panel according to another embodiment of the present invention.

2C is a cross-sectional view of a touch panel according to still another embodiment of the present invention.

3A to 3E are schematic diagrams showing a process of forming a touch panel structure in FIG. 2B.

4 is a schematic diagram of an electronic device embodying the present invention.

100'‧‧‧ touch panel

110‧‧‧Insert substrate

120‧‧‧ first light shielding layer

130‧‧‧flat layer

140‧‧‧ peripheral lines

150‧‧‧ touch sensing layer

151‧‧‧First pattern layer

152‧‧‧Insulation

153‧‧‧Second pattern layer

160‧‧‧Protective layer

170‧‧‧Grounded metal layer

190‧‧‧Soft printed circuit

M1‧‧‧ touch area

M2‧‧‧ surrounding area

Claims (26)

A touch panel includes: an insulating substrate having a touch area and a peripheral area surrounding the touch area; a touch sensing layer located in the touch area and a portion of the peripheral area of the insulating substrate; The circuit is located in the peripheral region of the insulating substrate and electrically connected to the touch sensing layer; a protective layer covering at least the peripheral circuit; and a grounding metal layer located on the protective layer, the grounding The range of metal layers covers the range of the surrounding lines. The touch panel of claim 1, wherein the protective layer covers the touch sensing layer and the peripheral line in a whole layer; or wherein the protective layer is annular to cover at least the Peripheral lines. The touch panel of claim 1, further comprising: a first light shielding layer located in the peripheral region of the insulating substrate, wherein the peripheral line is located above the first light shielding layer. The touch panel of claim 1, wherein the ground metal layer is a mesh structure. The touch panel of claim 3, further comprising: a second light shielding layer sandwiched between the ground metal layer and the insulating layer, wherein the second light shielding layer covers the peripheral area Fan Wai. The touch panel of claim 1, further comprising: a flexible printed circuit having at least one first ground pin, wherein the first ground pin is electrically connected to the ground metal layer. The touch panel of claim 6, wherein the flexible printed circuit further has at least one second grounding pin, wherein the second grounding pin is electrically connected to the at least one grounding conductor of the peripheral line. The touch panel of claim 6, wherein the first grounding pin is electrically connected to at least one grounding conductor of the peripheral line. The touch panel of claim 1, wherein the ground metal layer is a printed silver paste. The touch panel of claim 1 or 5, further comprising: a flat layer for forming the touch sensing layer within the touch area of the insulating substrate. An electronic device includes: a touch panel including an insulating substrate having a touch area and a peripheral area surrounding the touch area; and a touch sensing layer disposed on the touch area and a portion of the periphery of the insulating substrate a peripheral circuit, located in the peripheral region of the insulating substrate, and electrically connected to the touch sensing layer; a protective layer covering at least the peripheral line; a grounded metal layer over the protective layer, the range of the grounded metal layer covering the range of the peripheral line; and a first flexible printed circuit electrically connecting the peripheral line And having at least one first grounding pin electrically connected to the grounding metal layer; a liquid crystal display module adhered to the touch panel through an optical adhesive and having a second flexible printed circuit; and a circuit board including respectively The first and second flexible printed circuits are electrically connected to the touch panel and at least one wafer of the liquid crystal display module. The electronic device of claim 11, wherein the protective layer covers the touch sensing layer and the peripheral line in a whole layer; or wherein the protective layer is annular to cover at least the periphery line. The electronic device of claim 11, further comprising: a first light shielding layer located in the peripheral region of the insulating substrate, and the peripheral circuit is located above the first light shielding layer. The electronic device of claim 11, wherein the grounded metal layer is a mesh structure. The electronic device of claim 13, wherein the touch panel further comprises: a second light shielding layer sandwiched between the ground metal layer and the protective layer, wherein the second light shielding layer ranges Covers the range of the surrounding area. The electronic device of claim 11, wherein the first flexible printed circuit further has at least one second grounding pin, wherein the second grounding pin is electrically connected to the at least one grounding conductor of the peripheral line. The electronic device of claim 11, wherein the first grounding pin is electrically connected to at least one grounding conductor of the peripheral line. The electronic device of claim 11, wherein the grounded metal layer is a printed silver paste. The electronic device of claim 11 or claim 15, wherein the touch panel further comprises: a flat layer, the flat layer is configured to form the touch sensing layer on the insulating substrate Within the district. A method for manufacturing a touch panel includes: providing an insulating substrate, and dividing a touch area and a peripheral area surrounding the touch area on the insulating substrate; forming a touch sensing layer on the insulating substrate a peripheral portion of the insulating substrate is formed in the peripheral region of the insulating substrate; forming a protective layer covering at least the peripheral circuit; and forming a range thereof One of the ranges covering the perimeter line is a grounded metal layer on the protective layer, wherein the range of the grounded metal layer covers the range of the surrounding line. The method of manufacturing a touch panel according to claim 20, The protective layer covers the touch sensing layer and the peripheral line in a whole layer; or, wherein the protective layer is annular to cover at least the peripheral line. The method for manufacturing a touch panel according to claim 20, further comprising: forming a first light shielding layer located in the peripheral region of the insulating substrate, and the peripheral circuit is located above the first light shielding layer. The method of manufacturing a touch panel according to claim 20, wherein the grounded metal layer is a mesh structure. The method of manufacturing the touch panel of claim 22, further comprising: forming a second light shielding layer sandwiched between the ground metal layer and the protective layer, wherein the second light shielding layer covers the range The range of the non-display area. The method for manufacturing a touch panel according to claim 20, further comprising: providing a flexible printed circuit to electrically connect the at least one first grounding pin of the flexible printed circuit to the grounding metal layer. The method for manufacturing a touch panel according to claim 20, further comprising: forming a flat layer on the display area, wherein the flat layer is used to form the touch sensing layer on the insulating substrate Within the touch area.