Touch panel with four-layer structure and electronic touch equipment
By changing the electrode pattern distribution on a limited-size touchpad and setting shielding blocks, the line interference problem caused by wiring design is solved, ensuring the normal use and performance improvement of electronic devices.
Patent Information
- Application Number
- CN202422231777.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-10
AI Technical Summary
On touchpads with relatively limited sizes, wiring design can easily cause interference in the lines, affecting the normal use of electronic devices.
By changing the electrode pattern distribution of the induction layer and the driving layer, and setting shielding blocks on the driving layer to isolate interference, while additionally setting the driving electrode blocks on the induction layer to ensure that the electrodes can generate coupling capacitance normally.
It effectively isolates interference from touch device lines, ensures the normal operation of each touch interval and lines on the device layer, and improves the performance of electronic touch devices.
Smart Images
Figure CN222980011U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of touch pads, in particular to a touch pad with a four-layer structure and an electronic touch device. Background Art
[0002] With the rapid development of electronic products, the touch pads thereof have evolved from having only touch control functions to integrating NFC (Near Field Communication) technology, and then to integrating NFC technology and haptic technology to meet user experience. Among them, NFC technology is a non-contact identification and interconnection technology that can perform short-range wireless communication among mobile devices, consumer electronic products, PCs, and intelligent control tools; haptic technology can reproduce the sense of touch for users through a series of actions such as acting forces and vibrations, and support the human-computer interaction experience of global pressing and haptic feedback.
[0003] Currently, NFC technology and haptic technology are also widely applied to leather case keyboards. However, the size of the touch pad of a leather case keyboard is much smaller than that of the touch pad of a laptop computer. If one wants to integrate NFC technology and haptic technology on the touch pad of a leather case keyboard, a four-layer board process needs to be adopted, and more importantly, the placement space of related devices for NFC technology, related devices for touch control technology, related devices for haptic technology, and electronic devices such as sensors and vibration motors needs to be considered, as well as the routing space of the lines of each device, and so on.
[0004] As Figure 1 described above, the traditional four-layer structure touch pad from top to bottom is as follows: the first layer is the sensing layer 10 for laying out sensing channels; the second layer is the driving layer 20 for laying out driving channels; the third layer is the GND layer 30 for laying out ground wires to isolate interference; the fourth layer is the device layer 40 for laying out the above various electronic devices and their wirings; although a four-layer board process is used, due to the small size of the touch pad of the leather case keyboard, the routing space on the fourth device layer is still relatively small, resulting in insufficient space on the device layer to set the lines of some electronic devices. Therefore, these lines need to be laid on the third layer GND layer of the touch pad. However, this will cause no ground isolation between the electronic device lines set on the third layer and the driving channel patterns on the second layer, and the driving channel lines will greatly affect the use of this electronic device and even cause the electronic device to malfunction.
[0005] In the process of implementing the present utility model, the applicant found that there are at least the following problems in the prior art:
[0006] On a touch pad with relatively limited size, it is easy to cause interference to the lines in the wiring design. Summary of the Utility Model
[0007] The purpose of the present utility model is to provide a touchpad and an electronic touch device with a four-layer structure, so as to solve the technical problem in the prior art that on a touchpad with relatively limited dimensions, the wiring design is likely to cause interference to the circuit. The preferred technical solutions among the many technical solutions provided by the present utility model can produce many technical effects, which will be elaborated in detail below.
[0008] To achieve the above purpose, the present utility model provides the following technical solutions:
[0009] A touchpad with a four-layer structure provided by the present utility model includes: an induction layer, a driving layer, a shielding layer, and a device layer that are stacked; a plurality of touch devices are arranged on the device layer; the lines corresponding to the plurality of touch devices are respectively arranged on the device layer and a first partial area of the shielding layer; shielding blocks are arranged on the shielding layer; a plurality of driving electrode blocks are arranged on the driving area of the driving layer, and the second partial area of the driving layer is provided with the shielding blocks; a plurality of induction electrode blocks are arranged on the entire area of the induction layer, and the third partial area of the induction layer is provided with the driving electrode blocks; the first partial area, the second partial area, and the third partial area are vertically overlapped.
[0010] Preferably, the driving area of the driving layer includes a first area and a second area; the driving electrode blocks on the first area are arranged horizontally to form driving channels, and the driving electrode blocks on each driving channel are of a connecting rib structure with each other; the adjacent driving electrode blocks on the second area are of a connecting rib structure with each other.
[0011] Preferably, the driving electrode blocks on the second area and the driving electrode blocks on the third partial area of the induction layer are connected to form the driving channels, and the driving electrode blocks on the second area and the driving electrode blocks on the third partial area are connected through conductive vias.
[0012] Preferably, floating blocks are further arranged in the induction area of the induction layer. In the induction area, every two floating blocks are engaged on both sides of the induction electrode block; in the third partial area, every two driving electrode blocks are engaged on both sides of the induction electrode block; the induction electrode blocks are arranged longitudinally to form induction channels, and the induction electrode blocks on each induction channel are of a connecting rib structure with each other.
[0013] Preferably, the driving electrode blocks on the third partial area of the induction layer are of a connecting rib structure with each other.
[0014] Preferably, the floating blocks on the induction area of the induction layer and the driving electrode blocks on the driving area of the driving layer are overlapped.
[0015] Preferably, the touch device includes: a touch control chip, an NFC chip, an NFC antenna, a pressure sensing chip, a first pressure sensor, a second pressure sensor, a third pressure sensor, and a fourth pressure sensor; the NFC antenna is located in the middle of the device layer; the touch control chip, the NFC chip, and the pressure sensing chip are located on one side of the NFC antenna; the first pressure sensor, the second pressure sensor, the third pressure sensor, and the fourth pressure sensor are respectively located at the four corners of the device layer.
[0016] Preferably, the circuits of the touch control chip, the NFC chip, the NFC antenna, the pressure sensing chip, the second pressure sensor, the third pressure sensor, and the fourth pressure sensor are arranged on the device layer; the circuit of the first pressure sensor is arranged in the first partial area of the shielding layer.
[0017] Preferably, the shielding block is a copper-clad grid.
[0018] An electronic touch device includes a touch panel with the four-layer structure described in any one of the above.
[0019] Implementing one of the technical solutions in the above technical solutions of the present invention has the following advantages or beneficial effects:
[0020] In this solution, for the pattern structure of the touch panel, the electrode pattern distributions of the sensing layer and the driving layer are changed. According to the specific circuit positions on the shielding layer, shielding blocks are set at the corresponding positions on the driving layer to shield interference; correspondingly, driving electrode blocks are additionally set at the corresponding positions on the sensing layer so that the electrodes can normally generate coupling capacitance; specifically, shielding blocks are set at the corresponding positions on the driving layer to isolate the interference of the touch device circuits arranged on the shielding layer, and the shielding blocks arranged on the shielding layer can isolate the interference between the sensing layer and the driving layer on the device layer, thereby ensuring the normal operation of each touch area and its circuits on the device layer. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:
[0022] Figure 1 is a schematic structural diagram of the existing four-layer structure touch panel of the present invention;
[0023] Figure 2 is a schematic overall structural diagram of the four-layer structure touch panel of Embodiment 1 of the present invention;
[0024] Figure 3It is a schematic structural diagram of the induction layer in the first embodiment of the present utility model;
[0025] Figure 4 It is a schematic structural diagram of the driving layer in the first embodiment of the present utility model;
[0026] Figure 5 It is a schematic structural diagram of the device layer in the first embodiment of the present utility model;
[0027] Figure 6 It is a partial view of the induction layer and the driving layer in the first embodiment of the present utility model;
[0028] Figure 7 It is a partial view of the shielding layer and the driving layer in the first embodiment of the present utility model;
[0029] In the figure: 1. Induction layer; 11. Third partial area; 12. Induction electrode block; 13. Suspension block; 2. Driving layer; 21. Second partial area; 22. First area; 23. Second area; 24. Driving electrode block; 3. Shielding layer; 31. First partial area; 32. Shielding block; 4. Device layer; 41. Touch control chip; 42. NFC chip; 43. NFC antenna; 44. Pressure induction chip; 45. First pressure sensor; 451. Circuit of the first pressure sensor; 46. Second pressure sensor; 47. Third pressure sensor; 48. Fourth pressure sensor. Detailed implementation manners
[0030] In order to make the objectives, technical solutions and advantages of the present utility model clearer, various exemplary embodiments to be described below will refer to the corresponding drawings, which form a part of the exemplary embodiments and describe various exemplary embodiments that may be adopted to implement the present utility model. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. It should be understood that they are only examples of processes, methods, devices, etc. that are consistent with some aspects of the present utility model disclosed in detail in the appended claims. Other embodiments may also be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and essence of the present utility model.
[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", etc. indicate the orientation or positional relationship based on the orientation shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated elements must have a specific orientation, be constructed and operated in a specific orientation. The terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. The meaning of the term "plurality" is two or more. The terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a communication connection, a direct connection, an indirect connection through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more of the related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0032] In order to illustrate the technical solutions described in the present utility model, the following will be described by specific embodiments, and only the parts related to the embodiments of the present utility model are shown.
[0033] Embodiment 1:
[0034] As Figures 2 - 7 shown, the present utility model provides a touch panel with a four-layer structure, including: an induction layer 1, a driving layer 2, a shielding layer 3, and a device layer 4 that are stacked; a plurality of touch devices are arranged on the device layer 4; the lines corresponding to the plurality of touch devices are respectively arranged on the device layer 4 and a first partial area 31 of the shielding layer 3; each touch device is communicatively connected through its respective line, and the connection lines between each touch device and the induction electrode block 12 on the induction layer 1 and the driving electrode block 24 on the driving layer 2 are also arranged on the device layer 4. A shielding block 32 is arranged on the shielding layer 3; a plurality of driving electrode blocks 24 are arranged in the driving area of the driving layer 2, and a shielding block 32 is arranged in the second partial area 21 of the driving layer 2; a plurality of induction electrode blocks 12 are arranged in the entire area of the induction layer 1, and a driving electrode block 24 is arranged in the third partial area 11 of the induction layer 1; the first partial area 31, the second partial area 21, and the third partial area 11 are arranged to overlap vertically.
[0035] In this embodiment, for the pattern structure of the touchpad, the electrode pattern distributions of the sensing layer 1 and the driving layer 2 are changed. According to the specific circuit positions on the shielding layer 3, shielding blocks 32 are set at corresponding positions on the driving layer 2 to shield interference; correspondingly, driving electrode blocks 24 are additionally set at corresponding positions on the sensing layer 1 to enable the electrodes to normally generate coupling capacitance; specifically, by setting shielding blocks 32 at corresponding positions on the driving layer 2, the interference of the touch device circuit on the shielding layer 3 is isolated, and the shielding blocks 32 on the shielding layer 3 can isolate the interference of the sensing layer 1 and the driving layer 2 on the device layer 4, thereby ensuring the normal operation of each touch area and its circuit on the device layer 4.
[0036] As an alternative implementation, such as Figure 4 , the driving area of the driving layer 2 includes a first area 22 and a second area 23; the driving electrode blocks 24 on the first area 22 are arranged horizontally to form driving channels, and the driving electrode blocks 24 on each driving channel are in a continuous rib structure with each other; the adjacent driving electrode blocks 24 on the second area 23 are in a continuous rib structure with each other; each driving channel is connected to the touch chip 41 on the device layer 4 through a conductive via. Since the touchpad with a four-layer structure can set a separate layer as the driving layer 2, which is specifically used to lay out the driving channels, each driving electrode block 24 on each driving channel can adopt a continuous rib structure, so as to reduce the complexity of wiring and save the wiring cost.
[0037] Such as Figure 4 and Figure 6 shown, the driving electrode blocks 24 on the second area 23 and the third partial area 11 of the sensing layer 1 are connected to form a driving channel, and the driving electrode blocks 24 on the second area 23 and the driving electrode blocks 24 on the third partial area 11 are connected through conductive vias. In order to reduce the wiring complexity, the pattern shape of the sensing electrode blocks 12 on the third partial area 11 of the sensing layer 1 is changed, so that the driving electrode blocks 24 can adopt a continuous rib structure to form a driving channel, thereby reducing the wiring cost. The driving electrode blocks 24 on the second area 23 are connected in a continuous rib structure and are connected to the driving electrode blocks 24 on the third partial area 11 through conductive vias to form a complete driving channel. Only 4 conductive vias are used on this driving channel, which can greatly reduce the wiring difficulty.
[0038] As an alternative implementation, such as Figure 3 and Figure 6As shown, a floating block 13 is further provided in the sensing area of the sensing layer 1. The floating block 13 is a suspended block area, and its shape is the same as that of the driving electrode. In the sensing area, every two floating blocks 13 are engaged on both sides of the sensing electrode block 12. In the third partial area 11, every two driving electrode blocks 24 are engaged on both sides of the sensing electrode block 12 to ensure that the driving electrode blocks 24 and the sensing electrode blocks 12 are mutually coupled throughout the entire area of the touch panel to generate a coupling capacitance. The sensing electrode blocks 12 are arranged longitudinally to form a sensing channel, and the sensing electrode blocks 12 on each sensing channel are in a connecting rib structure with each other. Each sensing channel and each driving channel adopt a connecting rib structure, which can further reduce the wiring complexity. The driving electrode blocks 24 in the third partial area 11 of the sensing layer 1 are in a connecting rib structure with each other. The driving electrode blocks 24 in the third partial area 11 are also connected by a connecting rib structure, which can greatly reduce the wiring complexity. The floating blocks 13 in the sensing area of the sensing layer 1 and the driving electrode blocks 24 in the driving area of the driving layer 2 are overlapped. The floating blocks 13 engaged on both sides of the sensing electrode block 12 are not connected to each other, so that the driving electrode blocks 24 located on the driving layer 2 can replace the position of the floating blocks 13 and be coupled with the sensing electrode blocks 12 on the sensing layer 1 to generate a coupling capacitance.
[0039] As an alternative embodiment, as Figure 5 shown, the touch device includes: a touch control chip 41, an NFC chip 42, an NFC antenna 43, a pressure sensing chip 44, a first pressure sensor 45, a second pressure sensor 46, a third pressure sensor 47, and a fourth pressure sensor 48. Among them, the touch control chip 41 is used to cooperate with the sensing electrode block 12 and the driving electrode block 24 to implement the touch function. The NFC chip 42 is used to cooperate with the NFC antenna 43 to implement the NFC function. The pressure sensing chip 44 is used to cooperate with the four pressure sensors to implement the tactile function by detecting the magnitude of the pressure of the user on the touch panel, such as enabling the user to reproduce the tactile sensation through actions such as force and vibration. The NFC antenna 43 is located in the middle of the device layer 4. Since the size of the NFC antenna 43 has a direct relationship with the strength and divergence distance of its signal, for example, the signal of a smaller NFC coil is weak and the divergence distance is short, and the signal strength of a larger NFC coil increases accordingly, and the card reading distance also increases. Therefore, placing the NFC antenna 43 in the middle of the touch panel can set the largest NFC coil within a limited range to enhance the signal strength and divergence distance. The touch control chip 41, the NFC chip 42, and the pressure sensing chip 44 are located on one side of the NFC antenna 43. The first pressure sensor 45, the second pressure sensor 46, the third pressure sensor 47, and the fourth pressure sensor 48 are respectively located at the four corners of the device layer 4, which is convenient for connecting to the channels of the pressure sensors, thereby simplifying the wiring complexity. Further, as Figure 5 and Figure 7As shown in the figure, the circuits of the touch chip 41, NFC chip 42, NFC antenna 43, pressure sensing chip 44, second pressure sensor 46, third pressure sensor 47 and fourth pressure sensor 48 are arranged on the device layer 4; the circuit 451 of the first pressure sensor is arranged in the first partial area 31 of the shielding layer 3. In a touchpad with multiple functions, relatively more touch devices need to be arranged, but the size of the touchpad is limited. Therefore, the circuits of some touch devices have to be arranged on the shielding layer 3. In this embodiment, the circuit 451 of the first pressure sensor is arranged on the first partial area 31 of the shielding layer 3. Correspondingly, a shielding block 32 is arranged on the second partial area 21 of the driving layer 2 to isolate the interference between the sensing electrode block 12 and the driving electrode block 24 on the sensing layer 1, so as to ensure the normal use of the first pressure sensor 45.
[0040] As an alternative embodiment, the shielding block 32 is a copper-clad grid. The shielding block 32 can also be made of conductive materials such as galvanized steel, copper-aluminum composite metal, and conductive adhesive, which are used to separate the device layer 4 from the driving layer 2 and the sensing layer 1 to ensure the performance of each device on the device layer 4.
[0041] The embodiment is only a special case and does not indicate that the present invention has only such an implementation manner.
[0042] Embodiment 2:
[0043] The difference between this Embodiment 2 and Embodiment 1 is that: an electronic touch device includes a touchpad with a four-layer structure as described in any one of Embodiment 1. The electronic touch device includes: laptop computers, leather case keyboards, smart phones, tablet computers, smart watches, and smart furniture, etc. The electronic touch device in this embodiment realizes the touch function through the four-layer structure touchpad in Embodiment 1, can realize the NFC function and the tactile function, and the interference between the devices on the adopted touchpad is small, which can ensure the normal use of the functions of each device, thereby improving the user experience.
[0044] The above are only the preferred embodiments of the present invention. Those skilled in the art know that without departing from the spirit and scope of the present invention, these features and embodiments can be variously changed or equivalently replaced. In addition, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the protection scope of the present invention.
Claims
1. A touch panel with a four-layer structure, characterized in that: include: A sensing layer (1), a driving layer (2), a shielding layer (3) and a device layer (4) are stacked; a plurality of touch devices are arranged on the device layer (4); circuits corresponding to the plurality of touch devices are respectively arranged on the device layer (4) and on a first local area (31) of the shielding layer (3); a shielding block (32) is arranged on the shielding layer (3); a plurality of drive electrode blocks (24) are arranged on the drive area of the drive layer (2), and the shielding block (32) is arranged on the second local area (21) of the drive layer (2); a plurality of sensing electrode blocks (12) are arranged on the entire area of the sensing layer (1), and the driving electrode block (24) is arranged on the third local area (11) of the sensing layer (1); the first local area (31), the second local area (21) and the third local area (11) are arranged in an overlapping manner.
2. The touch panel of claim 1, wherein: The driving region of the driving layer (2) comprises a first area (22) and a second area (23); the driving electrode blocks (24) on the first area (22) are arranged transversely to form a driving channel, and the driving electrode blocks (24) on each driving channel are mutually connected to form a rib structure; and the adjacent driving electrode blocks (24) on the second area (23) are mutually connected to form a rib structure.
3. The touch panel of claim 2, wherein: The second area (23) and the driving electrode block (24) on the third local area (11) of the sensing layer (1) are connected to each other to form the driving channel, and the driving electrode block (24) on the second area (23) and the driving electrode block (24) on the third local area (11) are connected through a conductive via.
4. The touch panel of claim 1, wherein: The sensing region of the sensing layer (1) is further provided with suspension blocks (13); in the sensing region, every two suspension blocks (13) are engaged with the two sides of the sensing electrode block (12); in the third local region (11), every two driving electrode blocks (24) are engaged with the two sides of the sensing electrode block (12); the sensing electrode blocks (12) are arranged longitudinally to form a sensing channel, and the sensing electrode blocks (12) on each sensing channel are mutually connected rib structures.
5. The touch panel of claim 4, characterized in that: The driving electrode blocks (24) on the third local area (11) of the sensing layer (1) are interconnected structures.
6. The touch panel of claim 4, characterized in that: The suspension block (13) on the sensing region of the sensing layer (1) and the driving electrode block (24) on the driving region of the driving layer (2) are arranged in an overlapping manner.
7. The touch panel of claim 1, wherein: The touch device comprises: a touch control chip (41), an NFC chip (42), an NFC antenna (43), a pressure sensing chip (44), a first pressure sensor (45), a second pressure sensor (46), a third pressure sensor (47) and a fourth pressure sensor (48); the NFC antenna (43) is located in the middle of the device layer (4); the touch control chip (41), the NFC chip (42) and the pressure sensing chip (44) are located on one side of the NFC antenna (43); and the first pressure sensor (45), the second pressure sensor (46), the third pressure sensor (47) and the fourth pressure sensor (48) are respectively located at four corners of the device layer (4).
8. The touch panel of claim 7, characterized in that: The circuits of the touch control chip (41), the NFC chip (42), the NFC antenna (43), the pressure sensing chip (44), the second pressure sensor (46), the third pressure sensor (47) and the fourth pressure sensor (48) are arranged on the device layer (4); and the circuit (451) of the first pressure sensor is arranged in the first local area (31) of the shielding layer (3).
9. The touch panel of claim 1, wherein: The shielding block (32) is a copper-clad grid.
10. An electronic touch device, characterized in that: A touch panel with a four-layer structure comprising any one of claims 1-8.