TWI442296B - Electrical device - Google Patents

Description

Electronic device

The present invention relates to an electronic device, and more particularly to an electronic device having a touch screen and virtual buttons.

With the development of high performance and diversification of various electronic devices such as mobile phones and touch navigation systems, electronic devices in which a translucent touch panel is mounted in a display area are increasing. However, some function keys such as the switch button are still disposed on the body casing of the electronic device through the physical key, thereby affecting the sealing of the electronic device and reducing the user's touch experience. To this end, some electronic devices only set a pattern or a label representing the function key on the side of the touch interface facing the user, and a virtual button corresponding to the function key is disposed on the side of the touch interface facing the user. (Virtual Key), using this virtual button to sense the touch event that the user acts on the pattern or label.

The virtual button is disposed on a flexible circuit board and drives and senses the virtual button through an integrated circuit. Generally, the virtual button and the integrated circuit are respectively disposed on opposite sides of the touch screen in the first direction, and are connected by a set of driving wires and a set of sensing wires. However, the set of driving wires and a set of sensing wires require a wiring space and corresponding design and assembly works, which is disadvantageous for the design space utilization of the electronic device and increases the manufacturing cost.

In view of this, it is necessary to provide an electronic device having a simple structure.

An electronic device includes a touch screen, an integrated circuit, and at least one virtual button. The touch screen includes an insulating substrate and a first conductive layer disposed on a surface of the insulating substrate, and the first conductive layer is disposed on a surface of the corresponding touch region of the insulating substrate. The first conductive layer is electrically connected between the integrated circuit and the at least one virtual button.

An electronic device includes a touch screen, an integrated circuit, a virtual button, and a driving wire. The touch screen has a touch area for sensing a touch event, and the first conductive layer is disposed on a surface of the corresponding touch area of the insulating substrate. The integrated circuit is disposed at one end of the touch screen in a first direction. The virtual button is disposed at the other end of the touch screen in the first direction. The driving wire is electrically connected between the integrated circuit and the virtual button, and transmits a driving signal sent by the integrated circuit to the virtual button. The first conductive layer is electrically connected between the integrated circuit and the virtual button, and transmits a sensing signal sent by the virtual button to the integrated circuit.

Compared with the prior art, the sensing wire connecting the integrated circuit and the virtual button in the electronic device provided by the present invention is replaced by a conductive path disposed in the first conductive layer of the touch region. Thus, there is no need to additionally provide the sensing wires between the integrated circuit and the virtual keys. The structure of the electronic device is simplified, and the design space of the electronic device is saved.

The invention provides an electronic device comprising a touch screen, an integrated circuit and at least one virtual key. The integrated circuit and the virtual button are disposed on opposite sides of the touch screen.

The touch screen includes an insulating substrate and a conductive layer disposed on a surface of the insulating substrate. The touch screen has a touch area, and the conductive layer is disposed on a surface of the corresponding touch area of the insulating substrate. The conductive layer is electrically connected between the integrated circuit and the virtual button, and transmits a sensing signal sent by the virtual button to the integrated circuit.

The insulating substrate is made of a transparent insulating material, such as polyethylene (PE), polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PolyMethyl). MethAcrylate, PMMA), Optical Clear Adhesive (OCA) or thinned glass.

The conductive layer may have an Isotropy Impedance or an Anisotropic Impedance. By resistance isotropic, it is meant that the electrical resistance of the electrically conductive layer is substantially equal in all directions parallel to the electrically conductive layer. By resistance anisotropy is meant that the resistance of the conductive layer in one direction parallel to the conductive layer is much greater than the resistance parallel to the other direction of the conductive layer. For example, the ratio of the electrical resistance of the conductive layer in two directions perpendicular to the perpendicular to the conductive layer may be greater than 100. The conductive layer may be selected according to whether the touch screen system needs a single point or a multi-point type. The so-called single-point type touch screen can only recognize the position of one touch point at the same time, and the so-called multi-point type touch screen can recognize two or two at the same time. The position of more than one touch point. For example, if the conductive layer of the resistive touch screen and the capacitive touch screen is resistance omnidirectional, the touch screen is a single-point touch screen, and if the resistance is anisotropic, the touch screen is a multi-point touch screen. When the touch screen is a resistive touch screen, it comprises two of the insulating substrates and is spaced apart from each other and two conductive layers respectively disposed on corresponding touch regions of opposite surfaces of the two insulating substrates. When the touch screen is a capacitive touch screen, a conductive layer may be disposed on a surface of the insulating substrate corresponding to the touch area, or a conductive layer may be disposed on the opposite surfaces of the insulating substrate corresponding to the touch area.

The so-called conductive layer has a resistance anisotropy means that the conductive layers each have two mutually perpendicular directions, and the resistance of the conductive layer in one direction is much larger than the resistance in the other direction. The structure of the conductive layer having resistance anisotropy includes two types: one type of the conductive layer includes a plurality of linear conductive paths extending in one direction; and the other type is composed of a plurality of materials having conductive anisotropy. And the material is oriented. Taking an indium tin oxide film as an example, a complete indium tin oxide film can be patterned to form a plurality of linear small indium tin oxide conductive paths extending in the same direction and spaced apart from each other. For the conductive layer composed of the indium tin oxide film, the direction along which the indium tin oxide conductive path extends is the direction of conduction. Indium tin oxide The electrical paths are spaced apart so that the indium tin oxide conductive paths are insulated from each other. Therefore, the indium tin oxide film can be said to have resistance anisotropy. Taking a carbon nanotube film as an example, a plurality of small carbon nanotube films extending in the same direction and spaced apart from each other can be formed by patterning a complete carbon nanotube film to form a resistor. Anisotropic carbon nanotube film. In addition, since the carbon nanotube has a very good electrical anisotropy, it has very good electrical conductivity in the axial direction, and is almost an insulator in a direction perpendicular to the axial direction (ie, the diameter direction of the carbon nanotube). Optionally, the carbon nanotubes in a complete carbon nanotube membrane are oriented in a substantially oriented manner, so that the carbon nanotube membranes of the carbon nanotube membrane have good electrical conductivity in the axial direction of the carbon nanotubes. On the other hand, the conductivity in the axial direction perpendicular to the carbon nanotubes is poor, and a carbon nanotube film having resistance anisotropy is formed.

The focus of the touch screen of the present invention is to realize the signal transmission of the integrated circuit and the virtual button through the conductive layer of the touch area, thereby saving the space and cost of separately setting the wire and the wiring area in the prior art. Therefore, according to the above content, if the conductive layer electrically connecting the integrated circuit and the virtual button is isotropic, at most one virtual button can be set and the virtual button and the integrated circuit are respectively connected to opposite ends of the conductive layer, if the conductive layer A plurality of virtual keys may be set for the anisotropic direction, and the plurality of virtual keys and the integrated circuit are respectively disposed at two ends of the conductive layer in the conductive direction and connected. It can be seen from the above that those skilled in the art can clearly understand the technical content when the conductive layer is anisotropic in the above-mentioned conductive layer according to the technical content of the anisotropic property of the present invention. In the present specification, the present invention will be described focusing on the technical content when the conductive layer is an anisotropic.

The touch screen includes two conductive layers respectively disposed on corresponding touch regions of opposite surfaces of the two insulating substrates, hereinafter referred to as a first conductive layer and a second conductive layer. The first conductive layer or the second conductive layer may be a metal film, an Indium Tin Oxide (ITO) film or a carbon nanotube film.

For convenience of description, the minimum resistance direction of the first conductive layer is defined as a first direction, and the maximum resistance direction of the first conductive layer is defined as a second direction, and the first direction is perpendicular to the second direction. The minimum resistance direction of the second conductive layer is a second direction, and the maximum resistance direction of the second conductive layer is a first direction. That is, the minimum resistance direction of the first conductive layer is perpendicular to the minimum resistance direction of the second conductive layer, thereby forming a capacitive touch screen. In the electronic device of the present invention, the first conductive layer includes a plurality of linear conductive paths extending in a first direction, such as a metal strip, an indium tin oxide strip or a carbon nanotube strip. The second conductive layer may include a plurality of linear conductive paths extending in the second direction, or may be a conductive film composed of a plurality of materials having conductive anisotropy.

The integrated circuit includes a driving circuit, a sensing circuit and a control circuit. The control circuit is electrically connected to the driving circuit and the sensing circuit, respectively. The driving circuit is electrically connected to the virtual button through a driving wire. The sensing circuit is electrically connected to the virtual button through the first conductive layer. Specifically, in order to realize electrical connection between the sensing circuit and the virtual button, the sensing circuit is electrically connected to one end of the first conductive layer along the first direction, and the virtual button and the first conductive layer are along The other end of the first direction is electrically connected, that is, the sensing circuit and the virtual button are respectively electrically connected to both ends of the first conductive layer in the conductive direction.

In operation, the control circuit controls the driving circuit to send a driving signal to the virtual button, and simultaneously receives the sensing signal transmitted by the virtual button, so as to determine whether the virtual signal acts on the virtual signal according to the sensing signal. Touch event on the button. The sensing circuit is electrically connected to the virtual button through the conductive layer disposed on the corresponding touch area of the insulating substrate, thereby eliminating the need to provide a sensing wire between the virtual button and the sensing circuit, which simplifies the The structure of the electronic device. That is, the conductive layer can be used as a sensing wire electrically connected between the sensing circuit and the virtual button for transmitting the sensing signal of the virtual button.

Since the conductive layer itself is a functional component of the touch screen, the first conductive layer operates in addition to transmitting a sensing signal for the virtual key. In order to ensure that the virtual button and the touch screen do not collide when using the first conductive layer, it is ensured that the first conductive layer is only selected as the touch screen or only the virtual button at the same time. jobs. How to control specifically depends on the working principle of the touch screen. For example, if the touch screen is a single-layer capacitive touch screen, when the virtual key is in operation, the touch screen must be in a non-working state, and the number of the virtual keys can only be one. If the touch screen is a multi-point capacitive touch screen, when the virtual button is in operation, the conductive layer connecting the virtual button and the sensing circuit in the touch screen cannot load the driving signal. If the touch screen is a resistive touch screen, the touch screen must be in a non-working state when the virtual button is in operation. However, it can be known from the actual situation that the touch area is generally in a non-touch working state when the virtual button is pressed, or the work of the virtual button and the work of the touch area can be automatically alternated, so the present invention meets the practical use requirements. Of course, the present invention may also select a conductive path corresponding to the number of virtual buttons in the anisotropic conductive layer as a conductive path for separately connecting the virtual button and the integrated circuit, that is, the selected conductive path and the conductive path. The electrodes provided on the layer are not connected. For the sake of clarity, this is called a dedicated conductive path. At this time, there is no problem that the work of the touch area and the operation of the virtual button cannot be performed simultaneously. In order to better meet the actual needs, the above-mentioned dedicated conductive path can be selected according to the position of the touch screen touch area where the touch demand is low.

The virtual button can be disposed on a flexible circuit board and mechanically coupled to the first conductive layer by the flexible circuit board. The specific structure of the virtual button is not limited as long as the touch event of the user's finger or other tool acting on the virtual button can be sensed. Typically, the virtual button is a mutual inductance disposed or formed on the flexible circuit board. The mutual inductance capacitor may include two opposite electrodes disposed on the flexible circuit board a third conductive layer and a fourth conductive layer on the surface. The third conductive layer and the fourth conductive layer are spatially intersected to form a plurality of mutual inductance capacitive coupling nodes between the third conductive layer and the fourth conductive layer. When the virtual button receives a driving signal, a complex capacitor is generated between the third conductive layer and the fourth conductive layer, and the capacitance value of the capacitor is a sensing signal. The sensing circuit senses a change in the capacitance value of the virtual button, so as to sense a touch event acting on the virtual button, and obtain a more accurate touch position coordinate.

The electronic device of the present invention will be further described in detail below by taking a multi-point capacitive touch screen as an example, with reference to the accompanying drawings and specific embodiments.

1 , an electronic device 100 includes a touch screen 10 , an integrated circuit 20 , and a flexible printed circuit 30 . The integrated circuit 20 and the flexible circuit board 30 are disposed on both sides of the touch screen 10 along a first direction.

Referring to FIG. 1 and FIG. 2 , the touch screen 10 includes an insulating substrate 11 disposed on a touch area 101 and a trace area 102 of the insulating substrate 11 . The routing area 102 is disposed at an edge of the touch area 101. A first conductive layer 12 , a second conductive layer 13 , a plurality of sensing electrodes 14 , and a plurality of driving electrodes 15 are disposed in the touch area 101 . The first conductive layer 12 and the second conductive layer 13 are respectively disposed on opposite surfaces of the insulating substrate 11. The sensing electrode 14 is disposed at one end of the first conductive layer 12 along the first direction, and the driving electrode 15 is disposed at one end of the second conductive layer 13 along a second direction. The first direction is perpendicular to the second direction.

The insulating substrate 11 is a planar structure, mainly serves as a support, and should have good light transmittance. The insulating substrate 11 may be formed of a hard material such as glass, quartz or diamond, or a flexible material such as plastic or resin. Specifically, when the insulating substrate 11 is formed of a flexible material, the material may be polycarbonate (PC) or polymethacrylic acid. Polyester materials such as methyl ester (PMMA) and polyethylene terephthalate (PET), as well as polyether oxime (PES), cellulose ester, benzocyclobutene (BCB), polyvinyl chloride (PVC) , Optical Clear Adhesive (OCA) and acrylic resin. In this embodiment, the material of the insulating substrate 11 is an optical glue. It is to be understood that the material forming the insulating substrate 11 is not limited to the materials listed above, and it is within the scope of the present invention as long as the insulating substrate 11 can serve as a support and has a good transparency.

The first conductive layer 12 or the second conductive layer 13 may be a metal film, an Indium Tin Oxide (ITO) film, or a carbon nanotube film.

Referring to FIG. 3, the first conductive layer 12 includes a plurality of linear conductive vias 121 extending in a first direction, and the plurality of linear conductive vias 121 are parallel and spaced apart. Each of the conductive vias 121 is patterned to form a network structure in the first conductive layer 12, and the conductive vias 121 in the mesh structure are electrically connected to each other and arranged in an "x" shape. The conductive via 121 may be made of any conductive material as long as it remains transparent and has a linear structure. The conductive material includes a carbon nanotube, a metal, and a metal compound. In this embodiment, the conductive material is indium tin oxide.

The second conductive layer 13 includes a plurality of carbon nanotubes having good conductive anisotropy, and the plurality of carbon nanotubes extend substantially in the second direction. Referring to FIG. 4, the second conductive layer 13 may include a carbon nanotube film which is obtained by pulling a plurality of carbon nanotubes obtained from an array of super-sequential carbon nanotubes. A directional extension is formed, and the plurality of carbon nanotubes are connected to each other by Van der Waals attractive force to form a carbon nanotube film having a monolithic structure. Since the carbon nanotubes have a very large aspect ratio and the carbon nanotubes have very good electrical anisotropy, they have very good electrical conductivity in the axial direction and in the direction perpendicular to the axial direction (ie, nanometer). The diameter direction of the carbon tube is almost an insulator, so that the carbon nanotube film of the carbon nanotube film has good conductivity in the direction in which the carbon nanotube extends, and is vertical The conductivity in the direction in which the carbon nanotubes extend is poor. Therefore, the carbon nanotube film has resistance anisotropy.

The structure formed by the conductive path 121 in the first conductive layer 12 is a mesh structure, and the conductive path 121 and the carbon nanotube space in the second conductive layer 13 are disposed to cross each other to minimize the conductive path 121. The area of overlap with the carbon nanotubes, thereby reducing the capacitance per unit area of the touch screen 10. Since the insulating substrate 11 used in the manufacture of the touch panel 10 tends to have a relatively thin thickness, the capacitance per unit area of the touch panel 10 tends to be large. Therefore, the capacitance per unit area of the touch panel 10 can be reduced by forming the conductive vias 121 in the first conductive layer 12 into a line structure and interdigitating with the carbon nanotubes in the second conductive layer 13.

The plurality of sensing electrodes 14 are electrically connected to the plurality of conductive paths 121 at one end of the first conductive layer 12 along the first direction for transmitting the first conductive layer 12 from the conductive path 121. A sensing signal is transmitted to the integrated circuit 20, and at this time, the first conductive layer 12 is driven by one side. The sensing electrodes 14 may also be disposed at opposite ends of the first conductive layer 12 along the first direction, that is, the sensing electrodes are disposed at both ends of each of the conductive paths 121. At this time, the first Conductive layer 12 is bilaterally driven.

The driving electrode 15 is disposed at one end of the second conductive layer 13 in the second direction for transmitting a driving signal sent from the integrated circuit 20 to the second conductive layer 13. The first conductive layer 12 is driven unilaterally. The driving electrodes 15 may also be disposed at opposite ends of the second conductive layer 13 in the second direction. At this time, the second conductive layer 13 is bilaterally driven.

When the touch screen 10 is in operation, the second conductive layer 13 receives the driving signal, thereby forming a complex capacitance between the second conductive layer 13 and the first conductive layer 12. In the first conductive layer 12, a capacitance is formed between each of the conductive vias 121 and the second conductive layer 13. The first conductive layer 12 passes the sensing The electrode 14 transmits the capacitance value of the capacitor to the integrated circuit 20, and the capacitance value is a sensing signal. When the user touches the touch screen 10, the integrated circuit 20 can locate the touch of the user by sensing a change in a capacitance value or a capacitance value of a capacitance between the first conductive path 121 and the second conductive layer 13. point.

The integrated circuit 20 includes a driving circuit 21, a sensing circuit 22, and a control circuit 23. The control circuit 23 is electrically connected to the drive circuit 21 and the sensing circuit 22, respectively. The drive circuit 21 is electrically connected to the flexible circuit board 30. The sensing circuit 22 is electrically connected to the flexible circuit board 30 through the first conductive layer 12 . Specifically, in order to achieve electrical connection between the sensing circuit 22 and the flexible circuit board 30, the sensing circuit 22 is electrically connected to one end of the first conductive layer 12 along the first direction, and the flexible circuit board 30 and The first conductive layer 12 is electrically connected to the other end of the first conductive layer 12, that is, the sensing circuit and the flexible circuit board 30 are electrically connected to the two ends of the first conductive layer 12 in the conductive direction.

Referring to FIG. 1 , FIG. 5 and FIG. 6 , the flexible circuit board 30 includes a flexible circuit board 31 , a plurality of virtual buttons 32 , a driving signal input terminal 33 , and a plurality of sensing signal output terminals 34 . The virtual button 32, the driving signal input terminal 33 and the sensing signal output terminal 34 are all disposed on the flexible circuit board 31. The virtual button 32 is mechanically connected to the touch screen 10 through the flexible circuit board 31, and is electrically connected to the driving circuit 21 through the driving signal input terminal 33, and passes through the sensing signal output terminal 34 and the first The conductive layer 12 is electrically connected. The driving signal input terminal 33 and the driving circuit 21 are respectively disposed at the two ends of the touch screen 10. Therefore, in order to realize the electrical connection between the driving signal input terminal 33 and the driving circuit 21, a driving wire 331 can be connected to the The drive signal input terminal 33 is connected to the drive circuit 21. The drive wire 331 is disposed on the trace area 102. Each of the sensing signal output terminals 34 is electrically connected to one or the plurality of conductive paths 121 of the first conductive layer 12, so that the sensing signal output terminal 34 can be electrically connected to the sensing circuit 22. Can reason Therefore, since the sensing signal output terminal 34 and the sensing circuit 22 are connected by the conductive path 121 and the sensing electrode 14 connected to the conductive path 121, there is no need to be able to be at the sensing signal output terminal 34. The sensing signal is transmitted from the virtual button 32 to the sensing circuit 22 by further providing a sensing wire between the sensing circuit 22. At the same time, since the conventional sensing wires are all disposed on the routing area 102, the virtual button 32 in this embodiment uses the first conductive layer 12 as a sensing wire, or is omitted from being disposed in the The sense leads on the trace area 102. Therefore, the electronic device 100 of the present embodiment can reduce the area of the routing area 102 relative to the conventional electronic device, which is advantageous for miniaturization of the electronic device 100.

The material of the flexible circuit board 31 may be selected from plastic or resin and has a thickness of 10 micrometers to 70 micrometers, preferably 20 micrometers. The shape and size of the flexible circuit board 31 are not limited, and may be designed according to the size and shape of the virtual keys 32 required in the electronic device.

The plurality of virtual keys 32 may be a plurality of mutual inductance capacitors. Specifically, the plurality of virtual keys 32 include a plurality of third conductive layers 321 and a fourth conductive layer 322, and the plurality of third conductive layers 321 and the fourth conductive layer 322. The two surfaces of the flexible circuit board 31 are disposed opposite to each other. Each virtual button 32 corresponds to a third conductive layer 321 . The plurality of third conductive layers 321 may be formed into a shape substantially corresponding to the fourth conductive layer 322, and the plurality of third conductive layers 321 are spaced apart from each other. The fourth conductive layer 322 is electrically connected to the driving signal input terminal 33, and each of the third conductive layers 321 is electrically connected to a sensing signal output terminal 34. It can be understood that the structure of the plurality of virtual keys 32 is not limited to the above, as long as a plurality of mutual inductance capacitors can be formed. For example, in order to form a plurality of mutual inductance capacitors, the plurality of virtual buttons 32 may also include a plurality of third conductive layers 321 and a plurality of fourth conductive layers 322, that is, each of the virtual buttons 32 corresponds to a third conductive layer 321 and a fourth Conductive layer 322.

The third conductive layer 321 and the fourth conductive layer 322 may be formed by printing or plating etching, and the materials of the third conductive layer 321 and the fourth conductive layer 322. It is a metal having better conductivity, such as gold, silver or copper. In this embodiment, the third conductive layer 321 and the fourth conductive layer 322 are all metal lines printed on the flexible circuit board 31. Referring to FIG. 6 and FIG. 7 , the metal lines in the third conductive layer 321 are electrically connected to each other and arranged in a field shape. The metal lines in the fourth conductive layer 322 are electrically connected to each other and arranged in an "x" shape. The metal lines in the third conductive layer 321 and the metal lines in the fourth conductive layer 322 have different directions so as to be insulated and spatially crossed by the flexible circuit board 31, thereby forming the complex capacitive coupling node.

The driving signal input terminal 33 is disposed on the flexible circuit board 31 and electrically connected between the driving circuit 21 and the fourth conductive layer 322. The driving signal input terminal 33 is configured to input a driving signal sent by the driving circuit 21 to the fourth conductive layer 322, so that a capacitor is generated between the third conductive layer 321 and the fourth conductive layer 322. The capacitance value of the capacitor is a sensing signal. The sensing signal output terminal 34 is disposed on the flexible circuit board 31 and electrically connected between the first conductive layer 12 and the third conductive layer 321. The sensing signal output terminal 34 is configured to transmit the sensing signal in the third conductive layer 321 to the first conductive layer 12, and finally to the sensing circuit by the first conductive layer 12 twenty two. Thus, the control circuit 23 can sense a touch event acting on the virtual button 32 by sensing a change in the capacitance value of the complex capacitive coupling node.

Referring to FIG. 7 , a schematic diagram of the connection relationship of the electronic device 100 , the driving electrode 15 in the touch screen 10 and the driving signal input end 33 in the virtual button 32 are all connected to the driving circuit 21 in the integrated circuit 20 . Point connection. The sensing electrodes 14 in the touch screen 10 are then electrically coupled to the sensing circuitry 22 in the integrated circuit 20. Since the sensing signal output terminal 34 of the virtual button 32 is electrically connected to the first conductive layer 12, the sensing signal output terminal 34 is also electrically connected to the sensing circuit 22.

When the electronic device 100 is in operation, the control circuit 23 controls the driving The circuit 21 can sequentially send driving signals to the driving electrode 15 and the driving signal input terminal 33 by means of line-by-line time division scanning. When the driving electrode 15 receives the driving signal, the touch screen 10 operates and transmits the sensing signal in the first conductive layer 12 to the sensing circuit 22 through the sensing electrode 14. When the driving signal input terminal 33 receives the driving signal, the complex virtual button 32 operates, and the sensing signal of the plurality of virtual buttons 32 passes through the sensing signal output terminal 34 via the first conductive layer 12 And the sensing electrode 14 is transmitted to the sensing circuit 22. Since the virtual button 32 and the touch screen 10 have different working times, the sensing signal of the virtual button 32 can be transmitted to the sensing circuit 22 through the first conductive layer 12 without additional sensing. A wire is connected between the virtual button 32 and the sensing circuit 22. It is advantageous to simplify the structure of the electronic device 100 and save space of the electronic device 100. At the same time, since the plurality of virtual buttons 32 of the electronic device 100 share the fourth conductive layer 322, the number of the driving signal input terminals 33 can be reduced, thereby reducing the connection between the driving circuit 21 and the virtual button 32. The number of drive wires 331. The structure of the electronic device 100 can be further simplified, saving space of the electronic device 100.

The electronic device 100 may further include a touch interface (not shown), the touch interface is disposed on a side of the virtual button 32 away from the flexible circuit board 30, and the touch interface and the virtual button 32 The corresponding position is set with a pattern or logo.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧Electronic devices

10‧‧‧ touch screen

101‧‧‧ touch area

102‧‧‧Wiring area

11‧‧‧Insulation base

12‧‧‧First conductive layer

121‧‧‧Electrical path

13‧‧‧Second conductive layer

14‧‧‧Sensing electrode

15‧‧‧Drive electrode

20‧‧‧ integrated circuits

21‧‧‧Drive circuit

22‧‧‧Sensor circuit

23‧‧‧Control circuit

30‧‧‧Soft circuit board

31‧‧‧Soft circuit board

32‧‧‧virtual buttons

321‧‧‧ Third conductive layer

322‧‧‧4th conductive layer

33‧‧‧Drive signal input

331‧‧‧ drive wire

34‧‧‧Sensor signal output

FIG. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

2 is a schematic structural view of a touch screen in the electronic device of FIG. 1.

3 is a schematic structural view of the first conductive layer in the touch screen of FIG. 2 when connected to a sensing electrode.

Figure 4 is a scanning electron micrograph of a carbon nanotube film.

Figure 5 is a schematic view showing the structure of a flexible circuit board in one direction.

FIG. 6 is a structural schematic view of the flexible circuit board of FIG. 5 in another direction.

FIG. 7 is a schematic diagram showing the circuit connection of the electronic device of FIG. 1. FIG.

100‧‧‧Electronic devices

10‧‧‧ touch screen

101‧‧‧ touch area

102‧‧‧Wiring area

11‧‧‧Insulation base

12‧‧‧First conductive layer

14‧‧‧Sensing electrode

15‧‧‧Drive electrode

20‧‧‧ integrated circuits

21‧‧‧Drive circuit

22‧‧‧Sensor circuit

23‧‧‧Control circuit

30‧‧‧Soft circuit board

31‧‧‧Soft circuit board

32‧‧‧virtual buttons

33‧‧‧Drive signal input

331‧‧‧ drive wire

34‧‧‧Sensor signal output

Claims (14)

An electronic device includes: a touch screen, the touch screen includes an insulating substrate and a first conductive layer disposed on a surface of the insulating substrate, the touch screen has a touch area, and the first conductive layer is disposed at a surface of the insulating substrate corresponding to the touch area; an integrated circuit; at least one virtual button; a driving signal input terminal; at least one sensing signal output terminal; and a driving wire; and the improvement is that the driving wire is electrically connected Between the driving signal input end and the integrated circuit, the driving signal input end is electrically connected between the driving wire and the virtual button, and the at least one sensing signal output end is electrically connected to the Between the first conductive layer and the at least one virtual button, the first conductive layer is electrically connected between the integrated circuit and the at least one virtual button. The electronic device of claim 1, wherein the first conductive layer has electrical resistance isotropy. The electronic device of claim 1, wherein the first conductive layer has a conductive anisotropy, and the first conductive layer has a minimum resistance along a first direction, and the integrated circuit and the virtual button respectively The two sides of the touch screen in the first direction are disposed. The electronic device of claim 3, wherein the first conductive layer comprises a plurality of conductive paths extending in a first direction. The electronic device of claim 2, wherein a second conductive layer is further disposed in the touch area, and the second conductive layer is disposed opposite to the first conductive layer Two surfaces, the second conductive layer having electrical resistance isotropic. The electronic device of claim 2, wherein a second conductive layer is further disposed in the touch area, and the second conductive layer is disposed opposite to the first conductive layer Two surfaces, the second conductive layer has a resistance anisotropy, and the second conductive layer has a minimum resistance along a second direction. The electronic device of claim 6, wherein the second conductive layer comprises at least one carbon nanotube film, and the carbon nanotube film comprises a plurality of carbon nanotubes, the plurality of carbon nanotubes The axial direction extends substantially in the second direction. The electronic device of claim 7, wherein the plurality of carbon nanotubes in the carbon nanotube film are connected end to end by van der Waals force and extend substantially in a preferred orientation along the second direction. The electronic device of claim 1, wherein the electronic device further comprises a flexible circuit board, wherein the at least one virtual button, the driving signal input end and the at least one sensing signal output end are disposed in the On a flexible circuit board. The electronic device of claim 9, wherein the at least one virtual button comprises at least one third conductive layer having resistive anisotropy and a fourth conductive layer having resistive anisotropy, the at least a third conductive layer and a fourth conductive layer are respectively disposed on opposite surfaces of the flexible circuit board, and the at least one third conductive layer is electrically connected to the at least one sensing signal output end, the fourth The conductive layer is electrically connected to the driving signal input end. The electronic device of claim 10, wherein the at least one third conductive layer is a mesh structure formed of a plurality of conductive lines, and the fourth conductive layer comprises a plurality of conductive lines formed The mesh structure. The electronic device of claim 9, wherein the at least one virtual button comprises at least one third conductive layer and at least one fourth conductive layer disposed on opposite surfaces of the flexible circuit board. An electronic device comprising: a touch screen, the touch screen comprising an insulating substrate and a first conductive layer disposed on a surface of the insulating substrate, the touch screen having a touch area for sensing a touch event, the a conductive layer is disposed on a surface of the corresponding touch area of the insulating substrate; an integrated circuit is disposed at one end of the touch screen in the first direction and configured to emit a driving signal and receive a sensing signal; a virtual button, the virtual button is disposed at the other end of the touch screen in the first direction and electrically connected to a driving signal input end and a sensing signal output end, and the virtual button is accepted by the driving signal input end The driving signal transmits the sensing signal at the sensing signal output end; and a driving wire electrically connected between the integrated circuit and the virtual button, and the driving signal sent by the integrated circuit Transmitting to the virtual button; the improvement is that the first conductive layer is electrically connected between the integrated circuit and the virtual button, and the virtual button is sent Transmitting a sensing signal to the integrated circuit. The electronic device of claim 13, wherein the virtual button transmits the sensing signal from one end of the touch screen to the other end of the touch screen only through the first conductive layer.