CN113467629A

CN113467629A - Touch panel, preparation method thereof, display assembly and electronic equipment

Info

Publication number: CN113467629A
Application number: CN202010241671.2A
Authority: CN
Inventors: 曾露
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd; Royole Corp
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2021-10-01

Abstract

The application provides a touch panel (1), a manufacturing method thereof, a display assembly (4) and an electronic device (5), wherein the touch panel (1) comprises a touch electrode layer (11) and a substrate (10), the touch panel (1) further comprises a common grounding piece (20), the common grounding piece (20) and the touch electrode layer (11) are arranged on two opposite sides of the substrate (10), and the common grounding piece (20) comprises a plurality of grounded conductive parts (200). By arranging the common ground part (20) on one side of the substrate, when a user touches the touch panel (1), the user can be electrically connected with the conductive part (200) in the common ground part (20), so that the touch panel (1) is grounded with a human body, the coupling impedance between the human body and the system ground is reduced, the judgment accuracy of the touch panel (1) is improved, and the problem of low touch sensitivity is solved.

Description

Touch panel, preparation method thereof, display assembly and electronic equipment

Technical Field

The application belongs to the technical field of touch panels, and particularly relates to a touch panel, a preparation method of the touch panel, a display assembly and electronic equipment.

Background

With the continuous development of the related technologies of electronic devices, the portability of the electronic devices is greatly improved, and the operability of the electronic devices is diversified and convenient. However, the existing electronic devices still have some problems, such as when the electronic device is placed on a non-conductive object, such as a table or a box, etc., while the electronic device is in a "floating state". In addition, the touch panel, which is one of the components of the electronic device, generally includes a self-contained touch panel and a mutual-contained touch panel. When a user touches the ultrathin mutual capacitance type touch panel in a suspension state, the conditions of low touch sensitivity and even touch failure occur, and the touch performance of the ultrathin mutual capacitance type touch panel is greatly reduced.

Disclosure of Invention

In view of this, the present application provides a touch panel, a manufacturing method thereof, a display module, and an electronic device. A common ground is provided on one side of a substrate, and a plurality of conductive portions are provided in the common ground. Thus, when a user touches the touch panel, the user is electrically connected to the conductive part in the common component. And because the conductive part is grounded, the touch panel and the human body can be grounded when a user touches the touch panel, so that the coupling impedance between the human body and the system ground is reduced, the suspension current is reduced, and the judgment accuracy of the touch panel is improved. The problems of low touch sensitivity and even touch failure are solved, and the touch performance of the touch panel is improved.

The first aspect of the present application provides a touch panel, the touch panel includes a touch electrode layer and a substrate, and is characterized in that the touch panel further includes a common ground component, the common ground component is disposed on two opposite sides of the substrate with the touch electrode layer, the common ground component includes a plurality of grounded conductive portions, and when a user touches the common ground component, the common ground component is electrically connected with the conductive portions, so that the touch panel and the user share the ground.

The present application provides a touch panel, in which a common ground is disposed on one side of a substrate, and the common ground includes a plurality of grounded conductive parts. Thus, when a user touches the touch panel, the user touches the common ground element arranged on one side of the substrate, and the user is electrically connected with the conductive part in the common ground element. And because the conductive part is grounded, the touch panel and the human body can be grounded when a user touches the touch panel, so that the coupling impedance between the human body and the system ground is reduced, the suspension current is reduced, and the judgment accuracy of the touch panel is improved. The problems of low touch sensitivity and even touch failure are solved, and the touch performance of the touch panel is improved.

A second aspect of the present application provides a method for manufacturing a touch panel, including:

providing a substrate, and forming a touch electrode layer on one side of the substrate;

forming a common grounding piece on the other side of the substrate to obtain a touch panel; the common grounding part comprises a plurality of grounding conductive parts and is electrically connected with the conductive parts when a user touches the common grounding part, so that the touch panel is grounded with the user.

According to the preparation method provided by the second aspect of the application, the touch panel which is in common with the system ground when a user touches the touch panel can be effectively prepared, so that the coupling impedance between a human body and the system ground is reduced, the suspension current is further reduced, and the accuracy of judgment of the touch panel is improved. The problems of low touch sensitivity and even touch failure are solved, and the touch performance of the touch panel is improved.

A third aspect of the present application provides a display assembly, which includes a display panel and a touch panel as provided in the first aspect of the present application, wherein the display panel and the touch panel are stacked.

The display module that this application third aspect provided through adopting the touch panel that this application first aspect provided, can make the user realize sharing ground with the system when touching to reduce the coupling impedance between human body and the system ground, and then reduced the suspended current, improved the accuracy that touch panel judged. The problems of low touch sensitivity and even touch failure are solved, and the touch performance of the touch panel is improved.

The fourth aspect of the present application provides an electronic device, the electronic device includes a housing, a main board, and a display module as provided in the third aspect of the present application, the display module and the main board are installed in the housing, and the display module is electrically connected to the main board.

The electronic equipment provided by the fourth aspect of the application can enable a user to share the same ground with a system when the user touches the display assembly provided by the third aspect of the application, so that the coupling impedance between a human body and the system ground is reduced, the suspension current is reduced, and the accuracy of judgment of the touch panel is improved. The problems of low touch sensitivity and even touch failure are solved, and the touch performance of the touch panel is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be described below.

Fig. 1 is an equivalent circuit diagram of a touch panel with mutual capacitance touched by a user in the related art.

Fig. 2 is a schematic structural diagram of a touch panel according to an embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a touch panel according to another embodiment of the present application.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a top view of the touch panel in fig. 3 when a plurality of conductive parts are electrically connected.

Fig. 6 is a schematic structural diagram of a touch panel according to yet another embodiment of the present disclosure.

Fig. 7 is a schematic structural diagram of a touch panel according to yet another embodiment of the present application.

Fig. 8 is a schematic structural diagram of a touch panel according to yet another embodiment of the present disclosure.

Fig. 9 is a schematic structural diagram of a touch panel according to yet another embodiment of the present application.

Fig. 10 is a schematic structural diagram of a touch panel according to yet another embodiment of the present application.

Fig. 11 is a top view of fig. 10.

Fig. 12 is a schematic structural diagram of a touch panel according to yet another embodiment of the present application.

Fig. 13 is a schematic structural diagram of a touch panel according to yet another embodiment of the present application.

Fig. 14 is a schematic structural diagram of a touch panel according to yet another embodiment of the present application.

Fig. 15 is a schematic structural diagram of a touch panel according to yet another embodiment of the present application.

Fig. 16 is a schematic structural diagram of a touch panel according to yet another embodiment of the present application.

Fig. 17 is a process flow diagram of a method for manufacturing a touch panel according to an embodiment of the present disclosure.

Fig. 18 is a process flow diagram of step S200 in one embodiment of the present application of fig. 17.

Fig. 19 is a process flow diagram of step S200 in another embodiment of the present application of fig. 17.

FIG. 20 is a process flow diagram of step S200 in yet another embodiment of the present application, as shown in FIG. 17.

Fig. 21 is a schematic structural diagram of a display module according to an embodiment of the present disclosure.

Fig. 22 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Description of the drawings:

touch panel-1, display panel-3, display component-4, electronic device-5, shell-6, mainboard-7, substrate-10, touch area-100, touch electrode layer-11, bottom plate-12, groove-13, bottom wall-130, side wall-131, common ground component-20, conductive component-200, first conductive component-201, second conductive component-202, first sub-conductive component-203, second sub-conductive component-204, protective layer-205, insulation protection component-210, and anti-oxidation component-220.

Detailed Description

The following is a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present application, and these improvements and modifications are also considered as the protection scope of the present application.

Before the technical solutions of the present application are introduced, the present application first introduces the technical problems mentioned in the background art in detail.

In the related art, when the electronic device is placed on a non-conductive object, such as a wooden table or an insulating box, the electronic device is placed at a distance from the earth ground. At this time, the state of the electronic device can be called as a "floating state", that is, the electronic device is in a suspended and floating state. In addition, a touch panel, which is one of the components of the electronic device, generally includes a self-contained ultra-thin mutual-capacitive touch panel or a mutual-capacitive touch panel. When the electronic device including the ultra-thin mutual capacitance touch panel is in a floating state and a user touches the ultra-thin mutual capacitance touch panel, the problems of low touch sensitivity and even touch failure occur. Referring to fig. 1, fig. 1 is an equivalent circuit diagram of a mutual capacitance touch panel touched by a user in the related art. The ultra-thin mutual capacitance touch panel 1 sends a current i from a touch driving electrode (TX), receives the current i ' from a touch sensing electrode (RX), and then the touch sensing electrode sends the current i ' to an analog-to-digital converter (ADC), the ADC converts an analog signal into a digital signal, and the ADC sends the digital signal to a processor (IC), and the processor compares the current i ' received by the touch sensing electrode (RX) and the current i sent by the touch driving electrode (TX). When the current i' received by the touch sensing electrode (RX) is smaller than the current i sent by the touch driving electrode (TX), the processor determines that the ultra-thin mutual capacitance touch panel 1 has been touched, and determines the touched position of the ultra-thin mutual capacitance touch panel 1 according to the current variation. The above is the judgment standard for judging whether the ultra-thin mutual capacitance touch panel 1 is touched.

When a user touches the ultra-thin, mutually-capacitive touch panel, the user is not grounded to the battery or housing in the electronic device. First the user's finger will draw a portion of current i2 away to ground. In addition, when a user touches the ultra-thin mutual capacitance touch panel, a capacitance Cf1 is generated between the user's finger and the touch driving electrode, and a capacitance Cf2 is generated between the user's finger and the touch sensing electrode, so that an additional current i1 is generated in the ultra-thin mutual capacitance touch panel 1. Due to the large coupling impedance, i.e. the large resistance, between the human body and the system ground of the electronic device. Therefore, the added current i1 will not flow from the user's finger to the ground, but will flow into the touch sensing electrode. Therefore, the expression of the current i 'finally received by the touch sensing electrode is i + i1-i2, and thus the value of the current i' is changed. Due to the above reasons, the touch sensing sensitivity of the user is reduced when the user touches the ultra-thin mutual capacitance touch panel 1. In addition, as the thickness of the ultra-thin mutual capacitance touch panel 1 decreases, the capacitance Cf1 and the capacitance Cf2 increase continuously, and the current i1 also increases, when the current i1 is greater than the current i2, the current i' finally received by the touch sensing electrode is not less than the current i sent by the touch driving electrode, but is greater than the current i sent by the touch driving electrode. At this time, the processor cannot determine whether the ultra-thin mutual capacitance touch panel 1 is touched at all, which is the cause of the touch failure. As can be seen from the above, the problem of touch failure is becoming more serious for the ultra-thin mutual capacitance touch panel.

In order to solve the above problems, the present application provides an ultra-thin mutual capacitance touch panel. Referring to fig. 2, fig. 2 is a schematic structural diagram of a touch panel according to an embodiment of the present disclosure. The touch panel 1 includes a touch electrode layer 11 and a substrate 10, the touch panel 1 further includes a common ground element 20, and the common ground element 20 and the touch electrode layer 11 are disposed on two opposite sides of the substrate 10. The common ground 20 includes a plurality of grounded conductive parts 200, and is electrically connected to the conductive parts 200 when a user touches the common ground 20, so that the touch panel 1 is grounded to the user.

The present application first briefly introduces the above-mentioned structure.

The user can not only perform a key instruction on the touch panel 1, but also perform operations such as sliding, double-click, double-finger sliding and the like, thereby further improving the diversity of user operations. Optionally, the touch panel 1 includes a self-contained touch panel 1 or a mutual-contained touch panel 1. Further optionally, the touch panel 1 of the present application is a mutual capacitive touch panel 1. Further optionally, the touch panel 1 in the present application is illustrated by an ultrathin mutual capacitance type touch panel 1.

In the related art, when the electronic device is in a floating state, a large coupling impedance exists between a human body and a system ground of the electronic device, that is, a resistance R in fig. 1 is large, for example, between a user and the ultra-thin mutual capacitance touch panel 1, between the ultra-thin mutual capacitance touch panel 1 and a housing or a battery of the electronic device, and the like. Therefore, the newly added current i1 will not flow into the ground from the user's finger, and will not affect the judgment result of the processor. The present application adds a common ground 20 to one side of a substrate 10, and the common ground 20 includes a plurality of grounded conductive parts 200. And when the user touches the common ground element 20, the user is electrically connected to the conductive part 200, which can be understood as that the user is electrically connected to the ultra-thin mutual capacitance touch panel 1, that is, the user is common to the ultra-thin mutual capacitance touch panel 1. Therefore, the coupling impedance between the human body and the system ground, i.e. the resistance R in fig. 1, is reduced, so that the newly added partial current i1 flows into the ground along with the human body, and finally the current i' received by the touch sensing electrode is reduced, and thus the processor can more accurately determine whether the ultra-thin mutual capacitance touch panel 1 is touched.

In addition, the plurality of conductive parts 200 are grounded, which means that the plurality of conductive parts 200 and the housing of the electronic device are electrically connected through a wire; it can also be understood that the plurality of conductive parts 200 are electrically connected to a motherboard or a battery in the electronic device through a conductive wire, so that the ultra-thin mutual capacitance touch panel 1 is grounded to the electronic device. When a user touches the ultra-thin mutual capacitance touch panel 1, the user is electrically connected to the conductive part 200, and then the user shares the same ground with the system ground of the electronic device, so that the coupling impedance between the human body and the system ground is further reduced, i.e. the resistance R in fig. 1, the current i' received by the touch sensing electrode is reduced, and the accuracy of the processor determination is improved. As to the shape and position relationship of the conductive part 200 in the common ground part 20, and how the user is electrically connected to the conductive part 200 when the user touches the common ground part 20, the present application will be described in detail later.

Please refer to fig. 3, fig. 4 and fig. 5. Fig. 3 is a schematic structural diagram of a touch panel according to another embodiment of the present application. Fig. 4 is a top view of fig. 3. Fig. 5 is a top view of the touch panel in fig. 3 when a plurality of conductive parts are electrically connected. In this embodiment, the conductive part 200 is disposed on the surface of the substrate 10, and the common ground element 20 further includes an insulating protection part 210 and a plurality of oxidation resistant parts 220. The insulating protection portion 210 covers the surface of the substrate 10 and the conductive portion 200, the oxidation resistant portion 220 is embedded in the insulating protection portion 210, and the oxidation resistant portion 220 has conductivity and is electrically connected to the conductive portion 200.

In the present embodiment, the conductive part 200 is disposed on the surface of the substrate 10, and the shape of the conductive part 200 may be a thread shape, thereby reducing the volume of the conductive part 200 and improving the aperture ratio of the ultra-thin mutual capacitance touch panel 1. Then, the surface of the substrate 10 and the conductive part 200 are covered with the insulating protection part 210 to protect the surface of the substrate 10 and the conductive part 200, so as to prevent the conductive part 200 from being oxidized and thus the conductive performance is reduced.

Alternatively, the material of the conductive part 200 includes, but is not limited to, silver, copper, aluminum, magnesium, iron, or a transparent conductive material such as carbon fiber containing fluorine (TCF). In this embodiment, the surface of the insulating protection portion 210 is provided with a plurality of through holes, and the oxidation preventing portion 220 is provided in the through holes, and electrically connects the oxidation preventing portion 220 and the conductive portion 200. Since the conductive part 200 is covered with the insulating protector 210, the user cannot touch the conductive part 200 when touching, that is, the user cannot electrically connect to the conductive part 200. The anti-oxidation portion 220 is disposed such that a user can touch the anti-oxidation portion 220 when touching the ultra-thin mutual capacitance touch panel 1, and the anti-oxidation portion 220 is electrically connected to the conductive portion 200, so that the user can be electrically connected to the conductive portion 200. It can also be understood that the user is electrically connected to the conductive part 200 by touching the anti-oxidation part 220. Since the oxidation-resistant portion 220 has oxidation resistance, the oxidation-resistant portion 220 has good conductivity stability, and the conductivity of the oxidation-resistant portion 220 is not reduced or lost even after a long period of time.

Alternatively, the material of the oxidation resistant portion 220 may include, but is not limited to, graphite, graphene, carbon paste, and the like. The oxidation resistant portion 220 may be formed by a method including, but not limited to, screen printing, coating, spin coating, spray coating, vapor deposition, and the like. Optionally, the insulating protection portion 210 is made of a transparent material, and light rays are not affected to be emitted out of the insulating protection portion 210 for the user to watch. The material of the insulation protection portion 210 includes, but is not limited to, polyethylene terephthalate, UV optical glue, or silicon gel. The insulating protection portion 210 is prepared by a method including, but not limited to, screen printing, coating, spreading, spin coating, spray coating, vapor deposition, etc.

The plurality of conductive parts 200 are disposed at intervals and insulated from each other with respect to the positions of the plurality of conductive parts 200. In addition, the conductive parts 200 need to be commonly grounded, and in an embodiment of the present application, each conductive part 200 may be commonly grounded (as shown in fig. 4). Alternatively, in another embodiment of the present application, a plurality of conductive parts 200 are electrically connected to each other, and only one conductive part 200 is needed to be grounded, and all conductive parts 200 can be grounded (as shown in fig. 5).

Referring to fig. 4 again, the sizes of the conductive portion 200 and the oxidation resistant portion 220 are smaller than a predetermined size, so that when light is emitted from the ultra-thin mutual capacitance touch panel 1, a user cannot observe the conductive portion 200 and the oxidation resistant portion 220. The predetermined size is usually 0.01 to 0.2 mm.

Please refer to fig. 6, fig. 6 is a schematic structural diagram of a touch panel according to another embodiment of the present application. In this embodiment, a side of the oxidation resistant portion 220 facing away from the substrate 10 is flush with a side of the insulation protection portion 210 facing away from the substrate 10.

When the surface of the oxidation-resistant part 220 is flush with the side of the insulating protection part 210 away from the substrate 10, a user can directly touch the oxidation-resistant part 220 when touching the ultra-thin mutual capacitance touch panel 1. And when the surface of the oxidation-resistant part 220 is flush with the side of the insulating protection part 210, which faces away from the substrate 10, the roughness of the surface of the common ground piece 20 is low, so that the hand feeling of a user when touching is greatly improved.

Please refer to fig. 7, fig. 7 is a schematic structural diagram of a touch panel according to another embodiment of the present application. In this embodiment, the touch panel 1 includes a plurality of touch areas 100, the anti-oxidation portion 220 is disposed corresponding to the touch areas 100, and the anti-oxidation portion 220 has a preset shape, where the preset shape is used to indicate a position of the touch area 100 or an instruction corresponding to the touch area 100.

The ultra-thin mutual capacitance touch panel 1 generally includes a plurality of touch areas 100, and the touch areas 100 can be understood as areas with higher user touch frequency, for example, when the electronic device is a mobile phone, a previous touch area, a home touch area, a background touch area, etc. are often disposed on one side of the touch panel. When the electronic device is a keyboard, the keyboard usually has a plurality of key areas, such as an alphabet key area, a combination key area, a number key area, a symbol key area, and the like. In the present embodiment, the anti-oxidation portion 220 is disposed corresponding to the touch area 100, that is, the orthographic projection of the anti-oxidation portion 220 on the substrate 10 is located in the touch area 100, and the anti-oxidation portion 220 has a predetermined shape, and the anti-oxidation portion 220 having the predetermined shape has multiple functions.

As shown in fig. 4, fig. 5 and fig. 7, first, the predetermined shape can indicate the position of the touch area 100, i.e. the anti-oxidation portion 220 enables the user to clearly identify the position of the touch area 100 on the display panel 3, so that the user can quickly find the position needing touch. As shown in fig. 7, the anti-oxidation portion 220 may be configured to correspond to the shape of the command of the touch area 100. For example, when the electronic device is a keyboard, the partial oxidation prevention unit 220 is configured in a shape of a letter, and the letter corresponds to an instruction corresponding to the touch area 100. When the user sees the oxidation-resistant part 220 in the shape of the letter a, the user can know that the oxidation-resistant part 220 in the shape of the letter a corresponds to one touch area 100, and can know that the command corresponding to the touch area 100 is the letter a. Similarly, the digital antioxidant part 220 and the symbol-shaped antioxidant part 220 can be understood in the same manner. Again, when the volume of the anti-oxidation part 220 provided with a predetermined shape is large, it can be better electrically connected with the conductive part 200.

Please refer to fig. 8 and 9 together, fig. 8 is a schematic structural diagram of a touch panel according to another embodiment of the present application. Fig. 9 is a schematic structural diagram of a touch panel according to yet another embodiment of the present application. The conductive part 200 includes a first conductive member 201 and a plurality of second conductive members 202 in a direction parallel to the surface of the substrate 10, and the second conductive members 202 are electrically connected to the first conductive member 201.

As shown in fig. 8, in the present embodiment, a plurality of second conductive members 202 electrically connected to the first conductive member 201 are provided, so that the area of the orthographic projection of the conductive portion 200 on the substrate 10 can be increased, and further, the probability of the electrical connection between the anti-oxidation portion 220 and the conductive portion 200 can be increased, so that a user can easily electrically connect to the conductive portion 200 when touching the ultra-thin mutual capacitance touch panel 1, thereby improving the touch performance of the user. Optionally, the conductive portion 200 is made of a transparent conductive material, such as fluorine-containing carbon fiber (TCF), and the plurality of oxidation resistant portions 220 are randomly disposed in the insulation protection portion 210. Since the conductive part 200 is made of a transparent conductive material, when the insulating protection part 210 is also made of a transparent material, a user cannot distinguish the position of the conductive part 200 in order to improve the user experience, and in order to increase the probability of the electrical connection between the oxidation resistant part 220 and the conductive part 200, the second conductive part 202 is additionally provided when the oxidation resistant part 220 is prepared on the surface of the touch area, so as to increase the probability of the electrical connection between the oxidation resistant part 220 and the conductive part 200. It is understood that the second conductive member 202 is preferably disposed when the conductive portion 200 is made of a transparent conductive material.

Preferably, as shown in fig. 9, the second conductive member 202 includes a plurality of first sub-conductive members 203 and a plurality of second sub-conductive members 204, and the first sub-conductive members 203 and the second sub-conductive members 204 are respectively disposed at two opposite sides of the first conductive member 201. The first sub-conductive member 203 and the second sub-conductive member 204 are respectively disposed on two opposite sides of the first conductive member 201, so as to further increase the area of the orthographic projection of the conductive portion 200 on the substrate 10 and increase the probability of the electrical connection between the oxidation resistant portion 220 and the conductive portion 200. More preferably, a gap is provided between two adjacent first sub-conductors 203, and the second sub-conductor 204 is provided corresponding to the gap. The second sub-conductors 204 are disposed corresponding to the gaps, so that the area ratio of the orthographic projection of the second conductors 202 on the substrate 10 in the direction perpendicular to the arrangement direction of the first sub-conductors 203 can be increased, the first sub-conductors 203 and the second sub-conductors 204 are uniformly disposed, and the probability of the electrical connection between the oxidation resistant part 220 and the conductive part 200 is further increased.

Referring to fig. 9 again, the distance between any two adjacent oxidation resistant portions 220 is smaller than a preset distance, where the preset distance is a vertical distance between two opposite sides of a touched area of the common ground 20 when a user touches the ultra-thin mutual capacitance type touch panel 1. Since the oxidation preventing part 220 is electrically connected to the conductive part 200, in order to be electrically connected to the conductive part 200 when a user touches the ultra-thin mutual capacitance type touch panel 1, the user needs to touch the oxidation preventing part 220 in the common ground part 20. When a user touches the ultra-thin mutual capacitance touch panel 1 with a finger, the finger abuts against the common ground element 20, and at this time, a partial area of the common ground element 20 is touched by the finger, which is the touched area. The vertical distance between the two opposite sides of the touched area of the common ground element 20 is a predetermined distance. It can also be understood that when the user touches the ultra-thin mutual capacitance touch panel 1 with a finger, the finger abuts against the common ground 20, a portion of the finger abuts against the common ground 20, and a vertical distance between two opposite sides of the portion of the finger abutting against the common ground 20 is a predetermined distance. Alternatively, the preset distance is 0.5-1mm, and the vertical distance of the fingers of the user on the two opposite sides of the touched area of the common ground element 20 is generally greater than 1mm when touching the ultra-thin mutual capacitance touch panel 1. Therefore, as long as the distance between any two adjacent oxidation resistant portions 220 is smaller than the preset distance, that is, smaller than 0.5-1mm, when a user touches the ultra-thin mutual capacitance touch panel 1, a finger will touch the oxidation resistant portions 220, so that the user and the touch panel are electrically connected, and the touch sensitivity is further improved.

Please refer to fig. 10 and 11 together, fig. 10 is a schematic structural diagram of a touch panel according to another embodiment of the present application. Fig. 11 is a top view of fig. 10. In this embodiment, the common ground component 20 includes an insulating protection portion 210, the insulating protection portion 210 covers the surface of the substrate 10, and a side of the conductive portion 200 facing away from the substrate 10 is flush with a side of the insulating protection portion 210 facing away from the substrate 10.

In the present embodiment, the insulation protection portion 210 is disposed on a side away from the substrate 10, so that a user can directly touch the conductive portion 200 when touching the ultra-thin mutual capacitance touch panel 1, and the arrangement of the oxidation resistant portion 220 is omitted, so that the structure of the ultra-thin mutual capacitance touch panel 1 is simplified, and the cost of the ultra-thin mutual capacitance touch panel 1 is saved. In addition, when the side of the conductive part 200 departing from the substrate 10 is flush with the side of the insulating protection part 210 departing from the substrate 10, the roughness of the surface of the insulating protection part 210 can be reduced, and the touch feeling of a user during touch is greatly improved.

Please refer to fig. 12, fig. 12 is a schematic structural diagram of a touch panel according to another embodiment of the present application. In the present embodiment, a protective layer 205 is provided on the surface of the conductive part 200, and the protective layer 205 has conductivity. The provision of the protective layer 205 prevents oxidation of the conductive layer, thereby reducing or even losing the conductive properties of the conductive layer. The protective layer 205 is conductive, and ensures that a user is electrically connected to the conductive part 200 when touching the protective layer 205. Alternatively, the protective layer 205 of the present application may be formed by subjecting the conductive part 200 to oxidation resistance treatment. For example, when the conductive portion 200 is made of copper, the copper is subjected to an anti-oxidation treatment, so that a dense monomolecular protective film is formed on the surface of the copper, and the contact between air and the surface of the copper can be effectively isolated, thereby not only protecting the conductive portion 200, but also providing conductivity to the protective layer 205.

Please refer to fig. 13. Fig. 13 is a schematic structural diagram of a touch panel according to yet another embodiment of the present application. In this embodiment, the surface of the substrate 10 is provided with a plurality of grooves 13, the common ground 20 is disposed in the grooves 13, and one side of the common ground 20 facing the opening of the grooves 13 is flush with the surface of the substrate 10 on which the grooves 13 are formed.

According to the touch panel, the groove 13 can be formed in the surface of the substrate 10, and then the common ground piece 20 is arranged in the groove 13, so that the thickness of the ultra-thin mutual capacitance touch panel 1 and the quality of the ultra-thin mutual capacitance touch panel 1 can be reduced. And when one side of the common ground piece 20 facing the opening of the groove 13 is flush with the surface of the substrate 10 provided with the groove 13, the roughness of the surface of the substrate 10 can be reduced, and the hand feeling of a user during touch is greatly improved.

Please refer to fig. 14 and fig. 15. Fig. 14 is a schematic structural diagram of a touch panel according to yet another embodiment of the present application. Fig. 15 is a schematic structural diagram of a touch panel according to yet another embodiment of the present application. The recess 13 includes a bottom wall 130 and a side wall 131 connected to a peripheral edge of the bottom wall 130, the conductive part 200 may be directly disposed on the bottom wall 130 of the recess 13 (as shown in fig. 14), or a gap may be formed between the conductive part 200 and the bottom wall 130, and a side of the conductive part 200 facing away from the bottom wall 130 is flush with a side of the substrate where the recess is formed (as shown in fig. 15).

Referring to fig. 16, fig. 16 is a schematic structural diagram of a touch panel according to a further embodiment of the present application. In this embodiment, the size of the groove 13 gradually decreases from the surface close to the substrate 10 on which the groove 13 is formed to the surface away from the substrate 10 on which the groove 13 is formed. The size of the grooves 13 in this application is understood to be the larger the size of the grooves 13 the closer to the surface of the substrate 10. This is advantageous for demolding during the preparation of the groove 13, so as to reduce the difficulty in the preparation of the groove 13.

The above is a detailed structure of the touch panel 1 of the present application, and according to an embodiment of the present application, a method for manufacturing the touch panel 1 is also provided. The method can be used for preparing the touch panel 1 of the above scheme. Of course, the touch panel 1 may also be manufactured by using other manufacturing methods, which is not limited in this application. The touch panel 1 and the method for manufacturing the touch panel 1 provided by the embodiment of the present application can be used in combination or independently, which does not affect the essence of the present application.

Referring to fig. 17, fig. 17 is a process flow chart of a method for manufacturing a touch panel according to an embodiment of the present disclosure. The present embodiment provides a method for manufacturing a touch panel 1, including S100 and S200. The details of S100 and S200 are as follows.

S100, providing a substrate 10, and forming a touch electrode layer 11 on one side of the substrate 10.

And S200, forming a common grounding piece 20 on the other side of the substrate 10 to obtain the touch panel 1. The common ground 20 includes a plurality of grounded conductive parts 200, and is electrically connected to the conductive parts 200 when a user touches the common ground 20, so that the touch panel 1 is grounded to the user.

According to the preparation method provided by the embodiment of the application, the ultrathin mutual capacitance type touch panel 1 which shares the same ground with the system when a user touches the touch panel can be effectively prepared, so that the coupling impedance between a human body and the system ground is reduced, the suspension current is reduced, and the judgment accuracy of the ultrathin mutual capacitance type touch panel 1 is improved. The problems of low touch sensitivity and even touch failure are solved, and the touch performance of the ultrathin mutual capacitance touch panel 1 is improved.

Referring to fig. 18, fig. 18 is a process flow diagram of step S200 in fig. 17 according to an embodiment of the present disclosure. Wherein, the step S200 "of forming the common ground 20 on one side of the substrate 10" includes steps S211, S212, S213, and S214. The details of S211, S212, S213, and S214 are as follows.

S211, a plurality of conductive parts 200 are formed on the surface of the substrate 10.

The material of the substrate 10 includes PET, glass, or the like. The material of the conductive part 200 includes, but is not limited to, silver, copper, aluminum, magnesium, iron, or a transparent conductive material such as fluorine-containing carbon fiber (TCF). Methods of fabricating the conductive portion 200 include, but are not limited to, screen printing, coating, spreading, spin coating, spray coating, vapor deposition, and the like.

S212, forming an insulating protection portion 210 on the surface of the conductive portion 200 and the surface of the substrate 10, so that the insulating protection portion 210 covers the surface of the substrate 10 and the conductive portion 200.

The material of the insulating protection portion 210 includes, but is not limited to, polyethylene terephthalate, UV optical glue, or silica gel. The insulating protection portion 210 is prepared by a method including, but not limited to, screen printing, coating, spreading, spin coating, spray coating, vapor deposition, etc.

S213, forming a through hole on the surface of the insulating protection portion 210 to expose a portion of the surface of the conductive portion 200.

Wherein, a through hole can be formed on the surface of the insulating protection portion 210 by etching.

S214, forming an oxidation resisting part 220 in the through hole.

The material of the oxidation resistant portion 220 may include, but is not limited to, graphite, graphene, carbon paste, and the like. The oxidation resistant portion 220 may be formed by a method including, but not limited to, screen printing, coating, spin coating, spray coating, vapor deposition, and the like.

Referring to fig. 19, fig. 19 is a flowchart illustrating a process of step S200 in another embodiment of the present application shown in fig. 17. Wherein, the step S200 "of forming the common ground 20" on one side of the substrate 10 includes steps S221, S222, S223, and S224. The details of S221, S222, S223, and S224 are as follows.

And S221, forming an insulating protective layer on the surface of the substrate 10.

The material of the insulating protective layer includes, but is not limited to, polyethylene terephthalate, UV optical glue, or silica gel. The insulating protective layer is prepared by a method including but not limited to silk-screen printing, coating, spin coating, spray coating, vapor deposition and the like.

S222, placing the conductive part 200 into the insulating protective layer.

In this embodiment, the conductive part 200 may be press-fitted into the insulating protective layer by a press-fitting method.

And S223, curing the insulating protective layer to obtain the insulating protective part 210.

In this embodiment, the insulating protection layer may be cured by an ultraviolet curing method to obtain the insulating protection portion 210.

S224, removing the insulating protection portion 210 on the side of the conductive portion 200 away from the substrate 10, so as to expose the conductive portion 200.

In this embodiment, the excess insulating protection portion can be removed by etching or mechanical polishing.

Referring to fig. 20, fig. 20 is a flowchart illustrating a process of step S200 in another embodiment of the present application shown in fig. 17. Wherein, the S200 "forming the common ground 20" at one side of the substrate 10 includes S231. Wherein S231 is described in detail as follows.

S231, forming a plurality of grooves 13 on the surface of the substrate 10, and forming the common ground 20 in the grooves 13.

In this embodiment, the plurality of grooves 13 may be formed on the surface of the substrate 10 by injection molding or etching. Additionally, methods of fabricating the common ground 20 include, but are not limited to, screen printing, coating, spreading, spin coating, spray coating, vapor deposition, and the like.

Referring to fig. 21, fig. 21 is a schematic structural diagram of a display module according to an embodiment of the present disclosure. The embodiment provides a display module 4, the display module 4 includes a display panel 3 and the touch panel 1 provided in the embodiment, and the display panel 3 and the touch panel 1 are stacked.

The display device 4 is a multifunctional device integrating display and touch control. The ultra-thin mutual capacitance touch panel 1 mainly has a touch function in the display module 4, and is used for receiving various touch instructions of a user. As to the structure and the manufacturing method of the ultra-thin mutual capacitance touch panel 1, the above content of the present application has been described in detail, and optionally, the Display panel 3 of the present application includes an Organic Light-Emitting Diode (OLED) panel or a Liquid Crystal Display (LCD) panel. When the display panel 3 is an Organic Light-Emitting Diode (OLED) panel, the display panel 3 may be a Passive Matrix OLED (PMOLED) panel or an Active Matrix OLED (AMOLED) panel.

The display module 4 provided by the embodiment of the present application, through adopting the ultra-thin mutual capacitance touch panel 1 provided by the embodiment of the present application, can enable a user to share the same ground with a system when touching, thereby reducing the coupling impedance between a human body and the system ground, further reducing the suspension current, and improving the accuracy of the judgment of the ultra-thin mutual capacitance touch panel 1. The problems of low touch sensitivity and even touch failure are solved, and the touch performance of the ultrathin mutual capacitance touch panel 1 is improved.

Referring to fig. 22, fig. 22 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. The embodiment provides an electronic device 5, where the electronic device 5 includes a housing 6, a motherboard 7 and a display module 4 provided in the embodiment, the display module 4 and the motherboard 7 are installed in the housing 6, and the display module 4 is electrically connected to the motherboard 7.

The foregoing detailed description has provided for the embodiments of the present application, and the principles and embodiments of the present application have been presented herein for purposes of illustration and description only and to facilitate understanding of the methods and their core concepts; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The touch panel comprises a touch electrode layer and a substrate, and is characterized by further comprising a common grounding piece, wherein the common grounding piece and the touch electrode layer are arranged on two opposite sides of the substrate, the common grounding piece comprises a plurality of grounded conductive parts, and when a user touches the common grounding piece, the common grounding piece is electrically connected with the conductive parts, so that the touch panel and the user are grounded together.

2. The touch panel of claim 1, wherein the conductive portion is disposed on the substrate surface, the common ground element further includes an insulating protection portion and a plurality of oxidation prevention portions, the insulating protection portion covers the substrate surface and the conductive portion, the oxidation prevention portions are embedded in the insulating protection portion, and the oxidation prevention portions are conductive and electrically connected to the conductive portion.

3. The touch panel of claim 2, wherein a side of the oxidation resistant portion facing away from the substrate is flush with a side of the insulation protective portion facing away from the substrate.

4. The touch panel of claim 2, wherein the touch panel comprises a plurality of touch areas, the anti-oxidation portion is disposed corresponding to the touch areas, and the anti-oxidation portion has a predetermined shape, and the predetermined shape is used to indicate a position of the touch areas or an instruction corresponding to the touch areas.

5. The touch panel of claim 2, wherein the conductive portion comprises a first conductive member and a plurality of second conductive members in a direction parallel to the surface of the substrate, the second conductive members electrically connecting the first conductive members.

6. The touch panel of claim 5, wherein the second conductive member comprises a plurality of first sub-conductive members and a plurality of second sub-conductive members, and the first sub-conductive members and the second sub-conductive members are respectively disposed on opposite sides of the first conductive member.

7. The touch panel of claim 6, wherein a gap is formed between two adjacent first sub-conductive members, and the second sub-conductive member is disposed corresponding to the gap.

8. The touch panel of claim 2, wherein a distance between any two adjacent oxidation resistant portions is smaller than a preset distance, and the preset distance is a vertical distance between two opposite sides of a touched area of the common ground when a user touches the common ground.

9. The touch panel of claim 2, wherein the conductive portion and the anti-oxidation portion have a size smaller than a predetermined size such that the conductive portion and the anti-oxidation portion are not visible to a user when light is emitted from the touch panel.

10. The touch panel of claim 1, wherein the common ground element comprises an insulating protection portion covering the surface of the substrate, and wherein a side of the conductive portion facing away from the substrate is flush with a side of the insulating protection portion facing away from the substrate.

11. The touch panel of claim 10, wherein a protective layer is disposed on a surface of the conductive portion, and the protective layer has conductivity.

12. The touch panel of claim 1, wherein the surface of the substrate has a plurality of grooves, the common ground element is disposed in the grooves, and a side of the common ground element facing the opening of the grooves is flush with the surface of the substrate on which the grooves are formed.

13. The touch panel of claim 12, wherein the size of the groove decreases from a surface near the substrate on which the groove is formed to a surface away from the substrate on which the groove is formed.

14. The touch panel of claim 1, wherein the touch panel is an ultra-thin mutually-capacitive touch panel.

15. A method for manufacturing a touch panel includes:

16. The method of claim 15, wherein forming a common ground on one side of the substrate comprises:

forming a plurality of conductive portions on the surface of the substrate;

forming an insulating protection part on the surface of the conductive part and the surface of the substrate so that the insulating protection part covers the surface of the substrate and the conductive part;

forming a through hole on the surface of the insulating protection part so as to expose part of the surface of the conductive part;

and forming an oxidation resisting part in the through hole.

17. The method of claim 15, wherein forming a common ground on one side of the substrate comprises:

forming an insulating protective layer on the surface of the substrate;

placing the conductive part into the insulating protective layer;

curing the insulating protective layer to obtain an insulating protective part;

and removing the insulation protection part on one side of the conductive part, which is far away from the substrate, so that the conductive part is exposed.

18. The method of claim 15, wherein forming a common ground on one side of the substrate comprises: and forming a plurality of grooves on the surface of the substrate, and forming the common ground piece in the grooves.

19. A display device comprising a display panel and the touch panel of any one of claims 1-13, wherein the display panel and the touch panel are stacked.

20. An electronic device, comprising a housing, a motherboard, and the display device of claim 18, wherein the display device and the motherboard are disposed in the housing, and the display device is electrically connected to the motherboard.