Capacitive touchpad and electronic device

Abstract

The present application relates to the technical field of touchpads, and discloses a capacitive touchpad and an electronic device. The capacitive touchpad of the present application comprises a first circuit board, a second circuit board, a support, and a capacitive assembly. The support is provided on a first surface of the first circuit board, and the second circuit board is provided on the support in a direction away from the first surface. A second surface of the second circuit board facing the support is arranged opposite to the first surface. The capacitive assembly comprises a conductor plate and an electrode plate arranged opposite to the conductor plate. The conductor plate is arranged on the first surface, and the electrode plate is arranged on the second surface. The electrode plate comprises a first electrode plate, a first isolation plate arranged around the edge of the first electrode plate, and a second electrode plate arranged around the edge of the first isolation plate away from the first electrode plate. The first electrode plate and the second electrode plate are both electrically connected to the second circuit board, thereby improving the accuracy of pressure detection of the touchpad.

Description

Capacitive touchpads and electronic devices Cross-references to related applications

[0001] This application is based on and claims priority to Chinese Patent Application No. 2024118240516, filed on December 11, 2024, the entire contents of which are hereby incorporated herein by reference. Technical Field

[0002] This application relates to the field of touchpad technology, and in particular to a capacitive touchpad and electronic device. Background Technology

[0003] Currently, touchpads are widely used in consumer electronics, such as laptops and game controllers. To enhance touchpad performance and meet user demands, pressure sensors have been incorporated into touchpads to detect the pressure applied during touch, enabling different operations based on varying pressure levels. Existing pressure detection solutions for touchpads include, but are not limited to, capacitive solutions, strain gauge solutions, and pressure film solutions. However, strain gauge and pressure film solutions are susceptible to environmental and temperature variations, leading to poor detection results, and generally suffer from complex structures and high costs. Capacitive detection solutions, compared to strain gauge and pressure film solutions, offer higher accuracy and lower cost, and have thus gained widespread adoption.

[0004] In related technologies, capacitive touchpads use two plates and a conductor plate to form a capacitor. When the touchpad surface is pressed, the distance between the two plates and the conductor plate changes, causing a change in the detected capacitance. By detecting this change in capacitance, the pressure applied to the touchpad can be calculated. However, the accuracy of pressure detection in current capacitive touchpads remains insufficient. Summary of the Invention

[0005] The purpose of this application is to provide a capacitive touchpad and electronic device, thereby improving the accuracy of pressure detection of the touchpad.

[0006] To address the aforementioned technical problems, embodiments of this application provide a capacitive touchpad, comprising: a first circuit board, a second circuit board, a bracket, and a capacitor assembly; the bracket is disposed on a first surface of the first circuit board, and the second circuit board is disposed on the bracket in a direction away from the first surface; a second surface of the second circuit board is disposed opposite to the first surface, and the second surface is the surface of the second circuit board facing the bracket; the capacitor assembly includes a conductor plate and an electrode plate disposed opposite to the conductor plate; the conductor plate is disposed on the first surface, and the electrode plate is disposed on the second surface; the electrode plate includes a first electrode plate, a first isolation plate disposed around the edge of the first electrode plate, and a second electrode plate disposed around the edge of the first isolation plate away from the first electrode plate; both the first electrode plate and the second electrode plate are electrically connected to the second circuit board.

[0007] Embodiments of this application also provide an electronic device, including: a capacitive touchpad as described above.

[0008] In some embodiments, the first electrode plate is a receiving electrode plate and the second electrode plate is a transmitting electrode plate.

[0009] In some embodiments, the electrode plate further includes a ground plane and a second ground plane disposed between the first ground plane and the second electrode plate; the ground plane is disposed around the edge of the first ground plane away from the first electrode plate, the second ground plane is disposed around the edge of the ground plane away from the first ground plane, and the second electrode plate is disposed around the edge of the second ground plane away from the ground plane.

[0010] In some embodiments, the surface of the electrode plate away from the second surface has any of the following shapes: a regular quadrilateral, a regular hexagon, a regular octagon, or a circle.

[0011] In some embodiments, the capacitive touchpad further includes a cover plate disposed on the surface of the second circuit board away from the bracket.

[0012] In some embodiments, the support is a cuboid structure with a hollow region; the conductor plate is located inside the hollow region, and the electrode plate is located inside the hollow region.

[0013] In some embodiments, the support includes a support body and N cantilever beams extending from the support body toward the hollow region; N is a natural number greater than 0; the second circuit board is connected to the suspended ends of the N cantilever beams of the support; the first circuit board is provided with N limiting holes corresponding one-to-one with the N cantilever beams, and the cantilever beams are used to enter the limiting holes when the second circuit board is pressed.

[0014] In some embodiments, an elastic element is provided between the second circuit board and each of the cantilever beams.

[0015] In some embodiments, in a direction perpendicular to the first surface of the first circuit board, the projection of the electrode plate on the first circuit board lies within the projection of the conductor plate on the first circuit board.

[0016] The technical solution provided in this application has at least the following advantages:

[0017] The electrode plate in this embodiment includes a first electrode plate, a first isolation plate disposed around the edge of the first electrode plate, and a second electrode plate disposed around the edge of the first isolation plate away from the first electrode plate. This creates a nested structure between the first and second electrode plates. When the user presses different areas of the touchpad, the equivalent distance changes between the first and second electrode plates and the conductor plate are approximately the same, and the capacitance changes are also approximately the same, improving the accuracy of the touchpad's pressure detection. Furthermore, the first isolation plate isolates the first and second electrode plates from each other, ensuring the accuracy of the capacitance signal acquisition and further improving the accuracy of the touchpad's pressure detection. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1A is a schematic diagram of a cross-section of a capacitive touchpad in the related technology;

[0020] Figure 1B is a planar schematic diagram of two electrode plates on a circuit board in the related technology;

[0021] Figure 2A is an exploded view of a capacitive touch panel according to an embodiment of this application;

[0022] Figure 2B is a schematic cross-sectional view of a capacitive touch panel according to an embodiment of the present application;

[0023] Figure 2C is a plan view of the electrode plate of a capacitive touch panel according to an embodiment of the present application on a second circuit board.

[0024] Figure 3 is a cross-sectional view of the electrode plate and conductor plate of a capacitive touch panel according to an embodiment of the present application;

[0025] Figure 4A is a schematic diagram of the planar structure of an electrode plate according to an embodiment of this application;

[0026] Figure 4B is a schematic diagram of the planar structure of an electrode plate according to an embodiment of this application;

[0027] Figure 4C is a schematic diagram of the planar structure of an electrode plate according to an embodiment of this application;

[0028] Figure 5 is an exploded view of a capacitive touch panel according to an embodiment of this application;

[0029] Figure 6 is a schematic planar structure diagram of the electrode plate of a capacitive touch panel according to an embodiment of the present application. Detailed Implementation

[0030] As is known from the background technology, the accuracy of pressure detection in current capacitive touchpads is relatively poor. As shown in Figure 1A, which is a schematic diagram of the cross-section of a capacitive touchpad in the related technology, it includes an upper circuit board 101, a lower circuit board 102, an emitting electrode 103, a receiving electrode 104, a metal plate 105, and a support 106. The emitting electrode 103, the receiving electrode 104, and the metal plate 105 form a capacitor. When the touchpad surface is pressed, the emitting electrode 103 and the receiving electrode 104 move downward, and the distance between the emitting electrode 103 and the receiving electrode 104 and the metal plate 105 changes, thereby causing a change in the detected capacitance. By detecting the change in capacitance, the pressure on the touchpad can be calculated.

[0031] Analysis revealed that when a user presses different areas of the touchpad, even if the pressing force is the same and the amount of pressure at the pressing point is the same, the equivalent distance change between the transmitting electrode 103, the receiving electrode 104, and the metal plate 105 is different. Figure 1B shows a planar schematic of the two electrodes on the circuit board. For example, when a user presses points A and B with the same force, the pressure at point A is x, and the pressure gradually decreases as the user moves away from point A. Similarly, when a user presses point B, the pressure at point B is x, and the pressure gradually decreases as the user moves away from point B. It can be seen that point A is closer to the transmitting electrode 103 and the receiving electrode 104. Pressing point A can cause the transmitting electrode 103 and the receiving electrode 104 to move downwards by a larger amount. However, point B is farther away from the transmitting electrode 103 and the receiving electrode 104. When point B is pressed, the downward displacement of the transmitting electrode 103 and the receiving electrode 104 is smaller. This results in a large difference in the equivalent distance change between the transmitting electrode 103 and the receiving electrode 104 and the metal plate 105 under the same pressure, which in turn leads to a large difference in the change of capacitance, resulting in poor accuracy of the touchpad's pressure detection.

[0032] To address the issue of poor pressure detection accuracy in capacitive touchpad solutions in related technologies, one embodiment of this application relates to a capacitive touchpad, comprising: a first circuit board, a second circuit board, a bracket, and a capacitor assembly; the bracket is disposed on a first surface of the first circuit board, and the second circuit board is disposed on the bracket in a direction away from the first surface; the second surface of the second circuit board is disposed opposite to the first surface, and the second surface is the surface of the second circuit board facing the bracket; the capacitor assembly includes a conductor plate and an electrode plate disposed opposite to the conductor plate; the conductor plate is disposed on the first surface, and the electrode plate is disposed on the second surface; the electrode plate includes a first electrode plate, a first isolation plate disposed around the edge of the first electrode plate, and a second electrode plate disposed around the edge of the first isolation plate away from the first electrode plate; both the first electrode plate and the second electrode plate are electrically connected to the second circuit board.

[0033] The capacitive touchpad of this application embodiment has a structure comprising a first electrode plate, a first isolation plate surrounding the edge of the first electrode plate, and a second electrode plate surrounding the edge of the first isolation plate away from the first electrode plate. That is, the first and second electrode plates are nested. Therefore, when the user presses different areas of the touchpad, the equivalent distance change between the first and second electrode plates and the conductor plate is approximately the same, and the capacitance change is also approximately the same, improving the accuracy of the touchpad's pressure detection. Furthermore, the first isolation plate between the first and second electrode plates isolates them from each other, ensuring the accuracy of the capacitance signal acquisition and further improving the accuracy of the touchpad's pressure detection.

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this application to help readers better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0035] Figure 2A shows an exploded view of the capacitive touchpad of this embodiment; Figure 2B shows a cross-sectional view of the capacitive touchpad of this embodiment; and Figure 2C shows a planar view of the electrode plate in the capacitive touchpad of this embodiment on the second circuit board. The capacitive touchpad of this embodiment includes: a first circuit board 201, a second circuit board 202, a support (support body 205, cantilever beam 206), and a capacitor assembly (including a conductor plate 203 and an electrode plate 204).

[0036] Specifically, a support is provided on the first surface of the first circuit board 201, and a second circuit board 202 is provided on the support in a direction away from the first surface; the second surface of the second circuit board 202 is disposed opposite to the first surface, and the second surface is the surface of the second circuit board 202 facing the support; the capacitor assembly includes a conductor plate 203 and an electrode plate 204 disposed opposite to the conductor plate 203; the conductor plate 203 is disposed on the first surface, and the electrode plate 204 is disposed on the second surface; the electrode plate 204 includes a first electrode plate 2041, a first isolation plate 2042 disposed around the edge of the first electrode plate 2041, and a second electrode plate 2043 disposed around the edge of the first isolation plate 2042 away from the first electrode plate 2041; the first electrode plate 2041 and the second electrode plate 2043 are both electrically connected to the second circuit board 202.

[0037] Figure 3 shows a cross-sectional view of the electrode plate and conductor plate in this embodiment. The electric field lines between the electrode plate and the conductor plate are shown in Figure 3. Taking the first electrode plate 2041 as the receiving electrode plate and the second electrode plate 2043 as the emitting electrode plate as an example, the electric field lines between the first electrode plate 2041, the second electrode plate 2043 and the conductor plate 203 first pass through the second electrode plate 2043 to the conductor plate 203, and then to the first electrode plate 2041, so that the first electrode plate 2041 and the second electrode plate 2043 are coupled through the conductor plate 203 to form a capacitor.

[0038] In this embodiment, the first electrode plate 2041 and the second electrode plate 2043 are nested. When the user presses different areas of the touchpad, the equivalent distance change between the first electrode plate 2041, the second electrode plate 2043, and the conductor plate 203 is approximately the same, and the capacitance change is also approximately the same, thus improving the accuracy of the touchpad's pressure detection. Furthermore, a first isolation plate 2042 is provided between the first electrode plate 2041 and the second electrode plate 2043, isolating them from each other and ensuring the accuracy of the capacitance signal acquisition, further improving the accuracy of the touchpad's pressure detection.

[0039] In some embodiments, the electrode plate 204 is integrally formed with the second circuit board 202, and the conductor plate 203 is integrally formed with the first circuit board 201, thereby saving the size of the touch panel and making it easy to manufacture and connect with the corresponding circuit board; in some embodiments, the electrode plate 204 is located in the central area of ​​the second circuit board 202, and the conductor plate 203 is located in the central area of ​​the first circuit board 201, which is more conducive to improving the accuracy of touch panel pressure detection.

[0040] As shown in Figure 2C, when the user presses points C and D with the same force, the pressure at point C is y, and the pressure gradually decreases as the user moves away from point C. Similarly, when the user presses point D, the pressure at point D is y, and the pressure gradually decreases as the user moves away from point D. It can be seen that due to the nested structure of this embodiment, when points C and D are pressed, they can both cause the first electrode plate 2041 and the second electrode plate 2043 of approximately the same area to move downwards. Thus, under the same pressure, the equivalent distance change between the first electrode plate 2041, the second electrode plate 2043 and the conductor plate 203 is approximately the same, and the change in capacitance is also approximately the same, thereby improving the accuracy of the touchpad's pressure detection.

[0041] In practical applications, if the touchpad is installed on a laptop, users can set different operations based on different pressing pressures, such as taking a screenshot, vibrating, increasing or decreasing volume, increasing or decreasing screen brightness, etc. If the touchpad is installed on a game controller, different pressing pressures can trigger different game skills. Therefore, this embodiment, through the aforementioned nested electrode plate 204 design, can meet the increasingly higher requirements of users for the accuracy of touchpad pressure detection.

[0042] In this embodiment, considering the connection between the receiving plate and the processing unit, the receiving plate is responsible for transmitting the capacitive signal received from the transmitting plate to the processing unit. Therefore, in some embodiments, the first plate 2041 is the receiving plate, and the second plate 2043 is the transmitting plate. That is, the receiving plate is placed inside the nested structure, which can effectively isolate the receiving plate from interference from external signals and improve the anti-interference capability of the capacitive touchpad. In other embodiments, the positions of the transmitting plate and the receiving plate can also be interchanged, for example, the first plate 2041 is the transmitting plate, and the second plate 2043 is the receiving plate.

[0043] In some embodiments, the surface of the electrode plate 204 away from the second surface has any of the following shapes: a regular square, a regular hexagon, a regular octagon, or a circle. Taking the surface of the electrode plate 204 away from the second surface as a circle as an example, as shown in FIG2C, the electrode plate 204 has a nested circular structure. However, in practical applications, the electrode plate 204 can also be a regular square structure as shown in FIG4A, a regular hexagon structure as shown in FIG4B, or a regular octagon structure as shown in FIG4C.

[0044] It should be noted that the surface of the electrode plate 204 furthest from the second surface can be defined as the third surface. The accuracy of touchpad pressure detection is related to the surface area of ​​the third surface of the electrode plate 204. The larger the surface area of ​​the third surface, the higher the accuracy of touchpad pressure detection; the smaller the surface area of ​​the third surface, the lower the accuracy of touchpad pressure detection. In this embodiment, the surface area of ​​the third surface needs to be set as large as possible to improve the accuracy of touchpad pressure detection.

[0045] In some embodiments, as shown in FIG2A, the capacitive touchpad further includes a cover plate 200 disposed on the surface of the second circuit board 202 away from the support. The cover plate 200 is the area where the user touches the touchpad. By disposing the cover plate 200 on the surface of the second circuit board 202 away from the support, when the user presses the touchpad, the second circuit board 202 causes the electrode plate 204 structure to be pressed, thereby changing the capacitance of the capacitive assembly.

[0046] In some embodiments, the cover plate 200 may also be disposed on the surface of the first circuit board 201 away from the bracket, as shown in FIG5, which is a structural schematic diagram of a capacitive touch panel, including: a first circuit board 201, a second circuit board 202, a bracket (including a bracket body 205 and a cantilever beam 206), and a capacitor assembly (including a conductor plate 203 and an electrode plate 204); a bracket is disposed between the first circuit board 201 and the second circuit board 202, the conductor plate 203 is disposed on a first surface of the first circuit board 201 near the bracket, and the electrode plate 204 is disposed on a second surface of the second circuit board 202 near the bracket. The first surface and the second surface are disposed opposite to each other. The structure of the electrode plate 204 is the same as that shown in FIG2C in the above embodiment, and will not be described again here. The difference between FIG5 and the above embodiment is that the positions of the conductor plate 203 and the electrode plate 204 are interchanged. That is, when the user presses the cover plate 200 of the touch panel, the first circuit board 201 drives the conductor plate 203 to be pressed, thereby changing the capacitance of the capacitor assembly.

[0047] In some embodiments, as shown in Figures 2A and 5, the support is a cuboid structure with a hollow region; the conductor plate 203 is located inside the hollow region, and the electrode plate 204 is located inside the hollow region, that is, the conductor plate 203 is disposed on a portion of the first surface located in the hollow region, and the electrode plate 204 is disposed on a portion of the second surface located in the hollow region. The support includes a support body 205 and N cantilever beams 206 extending from the support body 205 toward the hollow region; N is a natural number greater than 0.

[0048] In one embodiment, as shown in FIG2A, the second circuit board 202 of the touch panel is connected to the suspended ends of N cantilever beams 206 of the bracket; the first circuit board 201 is provided with N limiting holes 208 corresponding one-to-one with the N cantilever beams 206, and the cantilever beams 206 are used to enter the limiting holes 208 when the second circuit board 202 is pressed. FIG2A illustrates an example with four cantilever beams 206 respectively set at the four vertices of the bracket. In actual applications, the position and number of cantilever beams 206 are set according to actual needs, and this embodiment does not impose specific limitations. In some embodiments, in a direction perpendicular to the first circuit board 201, the projection of the second circuit board 202 onto the first circuit board 201 is located inside the hollow area. When the user presses the touchpad, the surface of the cover plate 200 is subjected to pressure, which is then transmitted through the second circuit board 202 to the suspended end of the cantilever beam 206, causing the cantilever beam 206 to bend and deform. The cover plate 200 and the second circuit board 202 move downwards. Simultaneously, the cantilever beam 206 bends and deforms under pressure, thus entering the corresponding limiting hole 208. At this time, the distance between the electrode plate 204 and the conductor plate 203 decreases, and the capacitance of the capacitor assembly increases. The pressure on the touchpad can be determined by detecting the capacitance value between the conductor plate 203 and the electrode plate 204. In some embodiments, an elastic element 207 is provided between the second circuit board 202 and each cantilever beam 206. The elastic element 207 can be a spring, silicone pad, sponge, or other elastic structure, thereby protecting the second circuit board 202 and the cantilever beam 206 and improving the stability of the touchpad. It should be noted that, in some embodiments, in a direction perpendicular to the first circuit board 201, the projection of the second circuit board 202 onto the first circuit board 201 is located inside the hollow region.

[0049] In some embodiments, as shown in the structural schematic diagram of the capacitive touch panel in FIG5, the first circuit board 201 is connected to the suspended ends of the N cantilever beams 206 of the bracket; the second circuit board 202 is provided with N limiting holes 208 corresponding one-to-one with the N cantilever beams 206, and the cantilever beams 206 are used to enter the limiting holes 208 when the first circuit board 201 is pressed. In some embodiments, in a direction perpendicular to the second circuit board 202, the projection of the first circuit board 201 onto the second circuit board 202 is located inside the hollow region. When the user presses the touchpad, the surface of the cover plate 200 is subjected to pressure, which is transmitted through the first circuit board 201 to the suspended end of the cantilever beam 206, causing the cantilever beam 206 to bend and deform. The cover plate 200 and the first circuit board 201 move downwards. Simultaneously, the cantilever beam 206 bends and deforms under pressure, thus entering the corresponding limiting hole 208. At this time, the distance between the electrode plate 204 and the conductor plate 203 decreases, and the capacitance of the capacitor assembly increases. The pressure on the touchpad can be determined by detecting the capacitance value between the conductor plate 203 and the electrode plate 204. In some embodiments, an elastic element 207 is provided between the first circuit board 201 and each cantilever beam 206. The elastic element 207 can be a spring, silicone pad, sponge, or other elastic structure, thereby protecting the first circuit board 201 and the cantilever beam 206 and improving the stability of the touchpad. It should be noted that, in some embodiments, in the direction perpendicular to the second circuit board 202, the projection of the first circuit board 201 on the second circuit board 202 is located inside the hollow region.

[0050] In some embodiments, in a direction perpendicular to the first surface of the first circuit board 201, the projection of the electrode plate 204 on the first circuit board 201 lies within the projection of the conductor plate 203 on the first circuit board 201. That is, from the perspective of the top view, the area of ​​the conductor plate 203 is larger than the area of ​​the electrode plate 204 and the conductor plate 203 covers the electrode plate 204, so that each region of the first electrode plate 2041 and the second electrode plate 2043 in the electrode plate 204 is disposed opposite to the conductor plate 203, thereby improving the accuracy of capacitance change detection during capacitance detection and improving the accuracy of pressure detection of the touch panel.

[0051] In one embodiment, as shown in FIG6, it is a schematic diagram of the planar structure of the electrode plate in the capacitive touch panel of this application embodiment. Specifically, the electrode plate 204 includes not only the first electrode plate 2041, the first isolation plate 2042, and the second electrode plate 2043, but also a ground plane 2044 and a second isolation plate 2045 disposed between the first isolation plate 2042 and the second electrode plate 2043; the ground plane 2044 is disposed around the edge of the first isolation plate 2042 away from the first electrode plate 2041, the second isolation plate 2045 is disposed around the edge of the ground plane 2044 away from the first isolation plate 2042, and the second electrode plate 2043 is disposed around the edge of the second isolation plate 2045 away from the ground plane 2044. FIG6 illustrates the electrode plate 204 as a circle, but the electrode plate 204 can also be a regular square, a regular hexagon, a regular octagon, etc.

[0052] This embodiment of the application, by nesting the first electrode plate 2041, the first isolation plate 2042, the ground plate 2044, the second isolation plate 2045, and the second electrode plate 2043 in sequence, not only improves the accuracy of pressure detection of the touchpad, but also further improves the accuracy of capacitive signal acquisition by isolating the first electrode plate 2041 and the second electrode plate 2043 through the first isolation plate 2042, the ground plate 2044, and the second isolation plate 2045.

[0053] In some embodiments, the first electrode plate 2041 is a receiving electrode plate, and the second electrode plate 2043 is a transmitting electrode plate. That is, the receiving electrode plate is located at the innermost part of the nested structure. Then, a first isolation plate 2042, a ground plane 2044, and a second isolation plate 2045 are sequentially arranged. This not only isolates the first electrode plate 2041 and the second electrode plate 2043, but the ground plane 2044 also isolates the direct coupling between the first electrode plate 2041 and the second electrode plate 2043. This allows the receiving electrode plate to better isolate the transmitting electrode plate from interference from external signals, increasing the proportion of effective signals and improving the anti-interference capability of the capacitive touchpad. In other embodiments, the positions of the transmitting and receiving electrodes can be interchanged; for example, the first electrode plate 2041 can be the transmitting electrode plate, and the second electrode plate 2043 can be the receiving electrode plate.

[0054] Another aspect of this application provides an electronic device, including: the capacitive touchpad described above.

[0055] Compared with related technologies, the electronic device provided in this embodiment of the present application is provided with the capacitive touch panel provided in the aforementioned embodiments. Therefore, it also has the same technical effects provided in the aforementioned embodiments, which will not be elaborated here.

[0056] The above division of various components is only for clarity of description. In implementation, they can be merged into one component or some components can be split into multiple components. As long as they include the same logical relationship, they are all within the protection scope of this embodiment.

[0057] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing this application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of this application.

Claims

1. A capacitive touchpad, comprising: First circuit board, second circuit board, bracket, capacitor assembly; The bracket is disposed on a first surface of the first circuit board, and the second circuit board is disposed on the bracket in a direction away from the first surface; the second surface of the second circuit board is disposed opposite to the first surface, and the second surface is the surface of the second circuit board facing the bracket; The capacitor assembly includes a conductor plate and an electrode plate disposed opposite to the conductor plate; The conductor plate is disposed on the first surface, and the electrode plate is disposed on the second surface; The electrode plate includes a first electrode plate, a first isolation plate disposed around the edge of the first electrode plate, and a second electrode plate disposed around the edge of the first isolation plate away from the first electrode plate; both the first electrode plate and the second electrode plate are electrically connected to the second circuit board.

2. The capacitive touch panel according to claim 1, wherein, The first electrode plate is a receiving electrode plate, and the second electrode plate is a transmitting electrode plate.

3. The capacitive touch panel according to claim 1 or 2, wherein, The electrode plate also includes a ground plane and a second isolation plate disposed between the first isolation plate and the second electrode plate; The ground plane is disposed around the edge of the first isolation plate away from the first electrode plate, the second isolation plate is disposed around the edge of the ground plane away from the first isolation plate, and the second electrode plate is disposed around the edge of the second isolation plate away from the ground plane.

4. The capacitive touchpad according to any one of claims 1 to 3, wherein, The surface of the electrode plate away from the second surface has any of the following shapes: a regular square, a regular hexagon, a regular octagon, or a circle.

5. The capacitive touchpad according to any one of claims 1 to 4, wherein, The capacitive touchpad also includes a cover plate disposed on the surface of the second circuit board away from the bracket.

6. The capacitive touchpad according to any one of claims 1 to 5, wherein, The support is a cuboid structure with a hollow region; the conductor plate is located inside the hollow region, and the electrode plate is located inside the hollow region.

7. The capacitive touch panel according to claim 6, wherein, The support includes a support body and N cantilever beams extending from the support body toward the hollow region; where N is a natural number greater than 0. The second circuit board is connected to the suspended ends of the N cantilever beams of the bracket; the first circuit board is provided with N limiting holes corresponding one-to-one with the N cantilever beams, and the cantilever beams are used to enter the limiting holes when the second circuit board is pressed.

8. The capacitive touch panel according to claim 7, wherein, An elastic element is provided between the second circuit board and each of the cantilever beams.

9. The capacitive touchpad according to any one of claims 1 to 8, wherein, In a direction perpendicular to the first surface of the first circuit board, the projection of the electrode plate on the first circuit board lies within the projection of the conductor plate on the first circuit board.

10. An electronic device, comprising: The capacitive touchpad as described in any one of claims 1 to 9.

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