Capacitive Touchpad and Electronic Device

Abstract

The embodiment of 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 includes: a first circuit board, a second circuit board, a bracket, and a capacitive component; the bracket is arranged on the first surface of the first circuit board, and the second circuit board is arranged in a direction away from the first surface of the bracket; the second surface of the second circuit board facing the bracket is arranged opposite to the first surface; the capacitive component includes 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 includes 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; both the first electrode plate and the second electrode plate are electrically connected to the second circuit board; thereby improving the accuracy of pressure detection of the touchpad.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of touchpads, and particularly to a capacitive touchpad and an electronic device. Background Art

[0002] Currently, touchpads are widely used in the field of consumer electronics, such as laptop computers, game pads, etc. In order to improve the performance of the touchpad and meet the user's requirements for the touchpad, pressure sensors are added to the touchpad in related technologies to detect the pressing pressure of the touchpad, so as to implement different operations according to different pressures. The existing pressure detection schemes for touchpads include, but are not limited to, using capacitive schemes, strain gauge schemes, pressure film schemes, etc. The strain gauge scheme and the pressure film scheme are easily affected by the environment and temperature, resulting in poor detection effects, and generally have disadvantages such as complex structures and high costs. The capacitive detection scheme has higher accuracy and lower cost compared with the strain gauge scheme and the pressure film scheme, and has been widely used.

[0003] In related technologies, the capacitive scheme uses two electrode plates and a conductor plate to form a capacitor. When the surface of the touchpad is pressed, the distance between the two electrode plates and the conductor plate changes, resulting in a change in the detected capacitor. By detecting the change in the capacitor, the pressure received by the touchpad can be measured. However, the accuracy of the pressure detection of the current capacitive touchpad still cannot... Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a capacitive touchpad and an electronic device, thereby improving the accuracy of the pressure detection of the touchpad.

[0005] To solve the above technical problems, the embodiments of the present application provide a capacitive touchpad, including: a first circuit board, a second circuit board, a bracket, and a capacitive component; the bracket is provided on the first surface of the first circuit board, and the second circuit board is provided in a direction away from the first surface of the bracket; 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 capacitive component includes a conductor plate and an electrode plate disposed opposite to the conductor plate; the conductor plate is provided on the first surface, and the electrode plate is provided 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.

[0006] The embodiments of the present application also provide an electronic device, including: the capacitive touchpad as described above.

[0007] In some embodiments, the first electrode plate is a receiving electrode plate, and the second electrode plate is a transmitting electrode plate.

[0008] In some embodiments, the electrode plate further includes a ground plate and a second isolation plate disposed between the first isolation plate and the second electrode plate; the ground plate 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 plate 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 plate.

[0009] In some embodiments, the surface of the electrode plate in the direction away from the second surface has any one of the following shapes: a regular quadrilateral, a regular hexagon, a regular octagon, or a circle.

[0010] In some embodiments, the capacitive touch panel further includes a cover plate disposed on the surface of the second circuit board away from the bracket.

[0011] In some embodiments, the bracket 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.

[0012] In some embodiments, the bracket includes a bracket body and N cantilever beams extending from the bracket body in the direction towards the hollow region; N is a natural number greater than 0; the second circuit board is connected to the free ends of the N cantilever beams of the bracket; the first circuit board is provided with N limiting holes corresponding to the N cantilever beams one by one, and the cantilever beams are configured to enter the limiting holes when the second circuit board is pressed.

[0013] In some embodiments, an elastic member is disposed between the second circuit board and each of the cantilever beams.

[0014] In some embodiments, in the direction perpendicular to the first surface of the first circuit board, the projection of the electrode plate on the first circuit board is located within the projection of the conductor plate on the first circuit board.

[0015] The technical solutions provided by the embodiments of the present application have at least the following advantages:

[0016] The electrode plate of 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, such that the first electrode plate and the second electrode plate form a nested structure. When the user presses different areas of the touchpad, the equivalent distance change amounts between the first electrode plate, the second electrode plate and the conductor plate are substantially the same, and the capacitance change amounts are also substantially the same, improving the accuracy of pressure detection of the touchpad. Moreover, a first isolation plate is provided between the first electrode plate and the second electrode plate, such that the first electrode plate and the second electrode plate are isolated from each other, thereby ensuring the accuracy of capacitance signal acquisition and further improving the accuracy of pressure detection of the touchpad. Description of the Drawings

[0017] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the drawings in the figures do not constitute a proportional limitation.

[0018] Figure 1A Schematic diagram of the cross-section of a capacitive touchpad in the related art;

[0019] Figure 1B Schematic plan view of two electrode plates on a circuit board in the related art;

[0020] Figure 2A Exploded structural schematic diagram of a capacitive touchpad according to an embodiment of the present application;

[0021] Figure 2B Schematic diagram of the cross-section of a capacitive touchpad according to an embodiment of the present application;

[0022] Figure 2C Schematic plan view of the electrode plate of a capacitive touchpad according to an embodiment of the present application on a second circuit board;

[0023] Figure 3 Cross-sectional view between the electrode plate and the conductor plate of a capacitive touchpad according to an embodiment of the present application;

[0024] Figure 4A Schematic plan view of the electrode plate according to an embodiment of the present application;

[0025] Figure 4B Schematic plan view of the electrode plate according to an embodiment of the present application;

[0026] Figure 4C Schematic plan view of the electrode plate according to an embodiment of the present application;

[0027] Figure 5 Exploded structural schematic diagram of a capacitive touchpad according to an embodiment of the present application;

[0028] Figure 6 It is a schematic plan view of the electrode plate of a capacitive touch panel according to an embodiment of the present application. Detailed implementation manners

[0029] As can be seen from the background art, the accuracy of pressure detection of current capacitive touch panels is relatively poor. As Figure 1A shown, it is a schematic cross-sectional view of a capacitive touch panel in the related art, including an upper circuit board 101, a lower circuit board 102, a transmitting electrode plate 103, a receiving electrode plate 104, a metal plate 105, and a bracket 106. The transmitting electrode plate 103, the receiving electrode plate 104, and the metal plate 105 form a capacitor. When the surface of the touch panel is pressed, the transmitting electrode plate 103 and the receiving electrode plate 104 move downward, and the distance between the transmitting electrode plate 103, the receiving electrode plate 104 and the metal plate 105 changes, resulting in a change in the detected capacitance. By detecting the change in capacitance, the pressure applied to the touch panel can be measured.

[0030] Through analysis and research, it is found that: when a user performs a pressing operation on different areas of the touch panel, even if the pressing force is the same and the pressing amount at the pressing point of the touch panel is the same, the equivalent distance change amounts between the transmitting electrode plate 103, the receiving electrode plate 104 and the metal plate 105 are different. As Figure 1B shown, it is a schematic plan view of two electrode plates on the circuit board. For example, when the user presses points A and B with the same force respectively, when pressing point A, the pressing amount at point A is x, and the pressing amount gradually decreases in the direction gradually away from point A. When pressing point B, the pressing amount at point B is x, and the pressing amount gradually decreases in the direction gradually away from point B. It can be seen that point A is close to the transmitting electrode plate 103 and the receiving electrode plate 104. When pressing point A, it can drive the transmitting electrode plate 103 and the receiving electrode plate 104 to move downward by a relatively large displacement amount, while point B is far from the transmitting electrode plate 103 and the receiving electrode plate 104. When pressing point B, the displacement amount of the transmitting electrode plate 103 and the receiving electrode plate 104 moving downward is small. As a result, under the same pressing force, the difference in the equivalent distance change amounts between the transmitting electrode plate 103, the receiving electrode plate 104 and the metal plate 105 is relatively large, and further the difference in the change amount of capacitance is relatively large, making the accuracy of pressure detection of the touch panel relatively poor.

[0031] To solve the problem of poor accuracy in pressure detection in the capacitive solution of a touchpad in related technologies, an embodiment of the present application relates to a capacitive touchpad, including: a first circuit board, a second circuit board, a bracket, and a capacitive component; a bracket is provided on a first surface of the first circuit board, and the second circuit board is provided in a direction away from the first surface of the bracket; 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 capacitive component includes a conductor plate and an electrode plate disposed opposite to the conductor plate; the conductor plate is provided on the first surface, and the electrode plate is provided 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.

[0032] In the capacitive touchpad of this embodiment, the electrode plate is configured to include 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, that is, the first electrode plate and the second electrode plate are in a nested structure. Thus, when the user presses different areas of the touchpad, the equivalent distance change amounts between the first electrode plate, the second electrode plate and the conductor plate are substantially the same, and the capacitance change amounts are also substantially the same, improving the accuracy of pressure detection of the touchpad. Moreover, a first isolation plate is provided between the first electrode plate and the second electrode plate, so that the first electrode plate and the second electrode plate are isolated from each other, thereby ensuring the accuracy of capacitance signal acquisition and further improving the accuracy of pressure detection of the touchpad.

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in the embodiments of the present application, many technical details are presented for the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can still be implemented. The following division of each embodiment is for convenience of description and should not constitute any limitation on the specific implementation manner of the present application. Each embodiment can be combined and cross-referenced with each other on the premise of no contradiction.

[0034] As Figure 2A shown, it is an exploded structural schematic diagram of the capacitive touchpad of this embodiment. As Figure 2B shown, it is a schematic cross-sectional view of the capacitive touchpad of this embodiment. As Figure 2C shown, it is a plan 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 bracket (not labeled in the figure), and a capacitive component (not labeled in the figure).

[0035] Specifically, a bracket is provided on the first surface of the first circuit board 201, and a second circuit board 202 is provided on the bracket 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 bracket; the capacitive component 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; both the first electrode plate 2041 and the second electrode plate 2043 are electrically connected to the second circuit board 202.

[0036] As Figure 3 shown, it is a cross-sectional view of the electrode plate and the conductor plate of this embodiment. The trend of the electric field lines between the electrode plate and the conductor plate is as Figure 3 shown. Taking the first electrode plate 2041 as the receiving electrode plate and the second electrode plate 2043 as the transmitting electrode plate in the figure as an example for explanation, the trend of the electric field lines between the first electrode plate 2041, the second electrode plate 2043 and the conductor plate 203 is to 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.

[0037] The first electrode plate 2041 and the second electrode plate 2043 of this embodiment are of a nested structure. When the user presses different areas of the touchpad, the equivalent distance change amounts between the first electrode plate 2041, the second electrode plate 2043 and the conductor plate 203 are approximately the same, and the change amount of the capacitance is also approximately the same, improving the accuracy of the pressure detection of the touchpad. Moreover, a first isolation plate 2042 is provided between the first electrode plate 2041 and the second electrode plate 2043, so that the first electrode plate 2041 and the second electrode plate 2043 are isolated from each other, thereby ensuring the accuracy of the capacitance signal acquisition and further improving the accuracy of the pressure detection of the touchpad.

[0038] Specifically, in this embodiment, the electrode plate 204 and the second circuit board 202 are integrally formed, and the conductor plate 203 and the first circuit board 201 are integrally formed, thereby saving the volume of the touchpad and facilitating manufacturing and connection with the corresponding circuit board; at the same time, the electrode plate 204 is disposed in the central area of the second circuit board 202, and the conductor plate 203 is disposed in the central area of the first circuit board 201, which is more conducive to improving the accuracy of the pressure detection of the touchpad.

[0039] Specifically, as Figure 2CAs shown, when the user presses points C and D with the same force respectively, when pressing point C, the pressing amount at point C is y, and the pressing amount gradually decreases in the direction away from point C. When pressing point D, the pressing amount at point D is y, and the pressing amount gradually decreases in the direction away from point D. It can be seen that due to the nested structure of this embodiment, when points C and D are pressed, the first electrode plate 2041 and the second electrode plate 2043 with approximately the same area can be driven to move downward, so that under the same pressing force, the equivalent distance change amounts between the first electrode plate 2041, the second electrode plate 2043 and the conductor plate 203 are approximately the same, and the change amounts of the capacitance are also approximately the same, improving the accuracy of the pressure detection of the touchpad.

[0040] In practical applications, if the touchpad is set on a laptop, the user can set different operations according to different pressing pressures, such as taking screenshots, vibrating, increasing the volume, decreasing the volume, making the screen brightness stronger, making the screen brightness darker, etc.; if the touchpad is installed on a game controller, different pressing forces on the touchpad by the user can trigger different game skills. Therefore, the nested electrode plate 204 design in this embodiment can meet the increasingly high requirements of users for the accuracy of touchpad pressure detection at the present stage.

[0041] This embodiment considers that the receiving electrode plate is connected to the processing unit, and the receiving electrode plate is responsible for transmitting the capacitance signal received from the transmitting electrode plate to the processing unit. Therefore, the first electrode plate 2041 in this embodiment is the receiving electrode plate, and the second electrode plate 2043 is the transmitting electrode plate, that is, the receiving electrode plate is arranged inside the nested structure, which can effectively isolate the interference of external signals and is more conducive to improving the anti-interference ability of the capacitive touchpad. In other embodiments, the positions of the transmitting electrode plate and the receiving electrode plate can also be interchanged. For example, the first electrode plate 2041 is the transmitting electrode plate and the second electrode plate 2043 is the receiving electrode plate.

[0042] Specifically, the surface of the electrode plate 204 away from the second surface is in any one of the following shapes: regular quadrilateral, regular hexagon, regular octagon, circle. This embodiment takes the surface of the electrode plate 204 away from the second surface as a circle for illustration. As Figure 2C shown, the electrode plate 204 is a nested circular structure, but in practical applications, the electrode plate 204 can also be a regular quadrilateral structure as Figure 4A shown, or a regular hexagon structure as Figure 4B shown, or a regular octagon structure as Figure 4C shown.

[0043] It should be noted that the surface of the electrode plate 204 away 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.

[0044] Specifically, as Figure 2A shown, the capacitive touchpad further includes a cover plate 200, and the cover plate 200 is disposed on the surface of the second circuit board 202 away from the bracket. 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 bracket, when the user presses the touchpad, the second circuit board 202 drives the electrode plate 204 structure to be pressed, thereby changing the capacitance of the capacitive component.

[0045] In other embodiments, the cover plate 200 can be disposed on the surface of the first circuit board 201 away from the bracket. As Figure 5 shown, it is a schematic structural diagram of a capacitive touchpad, including: a first circuit board 201, a second circuit board 202, a bracket (not labeled in the figure), and a capacitive component (not labeled in the figure); a bracket is disposed between the first circuit board 201 and the second circuit board 202, a conductor plate 203 is disposed on the first surface of the first circuit board 201 close to the bracket, and an electrode plate 204 is disposed on the second surface of the second circuit board 202 close to 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 in the above embodiment Figure 2C shown and will not be elaborated here. Figure 5 The difference from 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 touchpad at this time, the first circuit board 201 drives the conductor plate 203 structure to be pressed, thereby changing the capacitance of the capacitive component.

[0046] Specifically, as Figure 2A , Figure 5 shown, the bracket in this embodiment is a cuboid structure with a hollow area; the conductor plate 203 is located inside the hollow area, and the electrode plate 204 is located inside the hollow area. That is, the conductor plate 203 is disposed on a part of the first surface located in the hollow area, and the electrode plate 204 is disposed on a part of the second surface located in the hollow area. Among them, the bracket includes a bracket body 205 and N cantilever beams 206 extending from the bracket body 205 towards the hollow area; N is a natural number greater than 0.

[0047] In one embodiment, as Figure 2AFor the touchpad shown, the second circuit board 202 is connected to the free ends of the N cantilever beams 206 of the bracket; the first circuit board 201 is provided with N limiting holes 208 corresponding to the N cantilever beams 206 one by one, and the cantilever beams 206 are configured to enter the limiting holes 208 when the second circuit board 202 is pressed. Figure 2A Taking the number of cantilever beams 206 as 4 and being respectively arranged at the four vertices of the bracket as an example for illustration. In actual applications, the positions and the number of the cantilever beams 206 are set according to actual needs, and are not specifically limited in this embodiment. Specifically, in the direction perpendicular to the first circuit board 201, the projection of the second circuit board 202 on the first circuit board 201 is located inside the hollow region. When a user presses the touchpad, after the surface of the cover plate 200 is subjected to pressure, the pressure is conducted through the second circuit board 202 to the free ends of the cantilever beams 206, causing the cantilever beams 206 to bend and deform. The cover plate 200 and the second circuit board 202 move downward. At the same time, the cantilever beams 206 bend and deform under the action of the pressure and thus enter the corresponding limiting holes 208. At this time, the distance between the electrode plate 204 and the conductor plate 203 becomes smaller, and the capacitance of the capacitive component becomes larger. By detecting the value of the capacitance between the conductor plate 203 and the electrode plate 204, the pressure applied to the corresponding touchpad can be determined. An elastic member 207 is provided between the second circuit board 202 and each cantilever beam 206 in this embodiment; the elastic member 207 can be an elastic structure such as a spring, a silica gel pad, or a sponge, so as to protect the second circuit board 202 and the cantilever beams 206 and improve the stability of the touchpad. It should be noted that in the direction perpendicular to the first circuit board 201, the projection of the second circuit board 202 on the first circuit board 201 is located inside the hollow region.

[0048] In another embodiment, as Figure 5Schematic structural diagram of the capacitive touchpad shown. The first circuit board 201 is connected to the free ends of the N cantilever beams 206 of the bracket; the second circuit board 202 is provided with N limiting holes 208 corresponding to the N cantilever beams 206 one by one, and the cantilever beams 206 are configured to enter the limiting holes 208 when the first circuit board 201 is pressed. Specifically, in this embodiment, 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 area. When the user presses the touchpad, after the surface of the cover plate 200 is subjected to pressure, the pressure is conducted to the free ends of the cantilever beams 206 through the first circuit board 201, causing the cantilever beams 206 to bend and deform. The cover plate 200 and the first circuit board 201 move downward. At the same time, the cantilever beams 206 bend and deform under the action of the pressure and thus enter the corresponding limiting holes 208. At this time, the distance between the electrode plate 204 and the conductor plate 203 becomes smaller, and the capacitance of the capacitive component becomes larger. By detecting the value of the capacitance between the conductor plate 203 and the electrode plate 204, the pressure received by the corresponding touchpad can be determined. In this embodiment, an elastic member 207 is provided between the first circuit board 201 and each cantilever beam 206. The elastic member 207 can be an elastic structure such as a spring, a silica gel pad, or a sponge, so as to protect the first circuit board 201 and the cantilever beams 206 and improve the stability of the touchpad. It should be noted that 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 area.

[0049] Specifically, in this embodiment, in the 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 is located within the projection of the conductor plate 203 on the first circuit board 201. That is, from the perspective of a 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. Thus, when performing capacitance detection, the accuracy of detecting capacitance change is relatively high, and the accuracy of pressure detection of the touchpad is improved.

[0050] In one embodiment, as Figure 6As shown in the figure, it is a schematic plan view of the electrode plate in the capacitive touchpad of this embodiment. Specifically, the electrode plate 204 not only includes a first electrode plate 2041, a first isolation plate 2042, and a second electrode plate 2043, but also includes a grounding plate 2044 and a second isolation plate 2045 arranged between the first isolation plate 2042 and the second electrode plate 2043; the grounding plate 2044 is arranged around the edge of the first isolation plate 2042 away from the first electrode plate 2041, the second isolation plate 2045 is arranged around the edge of the grounding plate 2044 away from the first isolation plate 2042, and the second electrode plate 2043 is arranged around the edge of the second isolation plate 2045 away from the grounding plate 2044. Figure 6 Taking the electrode plate 204 as a circle as an example for illustration, the electrode plate 204 can also be a regular quadrilateral, a regular hexagon, a regular octagon, etc.

[0051] In this embodiment, by nesting the first electrode plate 2041, the first isolation plate 2042, the grounding plate 2044, the second isolation plate 2045, and the second electrode plate 2043 in sequence, not only the accuracy of pressure detection of the touchpad is improved, but also the first electrode plate 2041 and the second electrode plate 2043 are isolated by the first isolation plate 2042, the grounding plate 2044, and the second isolation plate 2045, further improving the accuracy of capacitance signal acquisition.

[0052] Specifically, the first electrode plate 2041 of this embodiment is a receiving electrode plate, and the second electrode plate 2043 is a transmitting electrode plate, that is, the receiving electrode plate is arranged at the innermost part of the nested structure, and then the first isolation plate 2042, the grounding plate 2044, and the second isolation plate 2045 are arranged in sequence. Not only are the first electrode plate 2041 and the second electrode plate 2043 isolated, but the arrangement of the grounding plate 2044 can isolate the direct coupling between the first electrode plate 2041 and the second electrode plate 2043, which can better enable the receiving electrode plate to effectively isolate the interference of the transmitting electrode plate and external signals, improve the proportion of effective signals, and is more conducive to improving the anti-interference ability of the capacitive touchpad. In other embodiments, the positions of the transmitting electrode plate and the receiving electrode plate can also be interchanged. For example, the first electrode plate 2041 is the transmitting electrode plate and the second electrode plate 2043 is the receiving electrode plate.

[0053] Another aspect of the embodiment of the present application also provides an electronic device, including: the above-mentioned capacitive touchpad.

[0054] Compared with the related art, the electronic device provided in this embodiment of the present application is provided with the capacitive touchpad provided in the foregoing embodiment. Therefore, it also has the technical effects provided in the foregoing embodiment, which will not be elaborated here.

[0055] The division of the various components above is only for clear description. When implemented, they can be combined into one component or some components can be split into multiple components. As long as the same logical relationship is included, they are all within the protection scope of this embodiment.

[0056] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing this application. In actual applications, various changes can be made to them in form and details without departing from the spirit and scope of this application.

Claims

1. A capacitive touch panel, characterized in that: include: A first circuit board, a second circuit board, a bracket, and a capacitor assembly; The bracket is arranged on the first surface of the first circuit board, and the second circuit board is arranged on the bracket in a direction away from the first surface; the second surface of the second circuit board is arranged 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 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 first isolation plate and away from the edge of the first electrode plate; the first electrode plate and the second electrode plate are both electrically connected to the second circuit board; The first plate is a receiving plate, and the second plate is a transmitting plate; the first plate and the second plate are coupled through the conductor plate to form a capacitor; The electrode plate also includes a grounding plate and a second isolation plate arranged between the first isolation plate and the second electrode plate; the grounding plate is arranged around the edge of the first isolation plate away from the first electrode plate, the second isolation plate is arranged around the edge of the grounding plate away from the first isolation plate, and the second electrode plate is arranged around the edge of the second isolation plate away from the grounding plate.

2. The capacitive touch panel according to claim 1, characterized in that: The surface of the electrode plate away from the second surface is in any one of the following shapes: a regular quadrilateral, a regular hexagon, a regular octagon, or a circle.

3. The capacitive touch panel according to claim 1, characterized in that: The capacitive touch panel further includes a cover plate, which is disposed on a surface of the second circuit board away from the bracket.

4. The capacitive touch panel according to claim 1, characterized in that: The bracket is a rectangular parallelepiped structure with a hollow area; the conductor plate is located inside the hollow area, and the electrode plate is located inside the hollow area.

5. The capacitive touch panel according to claim 4, characterized in that: The support comprises a support body and N cantilever beams extending from the support body toward the hollow area; 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 to the N cantilever beams one by one, and the cantilever beams are used to enter the limiting holes when the second circuit board is pressed.

6. The capacitive touch panel according to claim 5, characterized in that: An elastic member is arranged between the second circuit board and each of the cantilever beams.

7. The capacitive touch panel according to any one of claims 1, 3 to 6, characterized in that: In a direction perpendicular to the first surface of the first circuit board, a projection of the electrode plate on the first circuit board is located within a projection of the conductor plate on the first circuit board.

8. An electronic device, characterized in that: include: A capacitive touch panel as claimed in any one of claims 1 to 7.

Images