Touch control structure and electronic equipment
By integrating pressure sensors, elastomers, and capacitance detection components inside the touch panel, problems such as capacitive touch failure and large pressure detection range are solved, achieving stable pressure and capacitance detection and improving the reliability of the touch structure.
Patent Information
- Application Number
- CN202520162783.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Existing capacitive touch is prone to failure under special conditions such as wet hands or oil stains. Pressure-sensitive touch has a large detection range. In the integrated solution of capacitive and pressure-sensitive touch, accidental touch or panel deformation can cause false triggering of capacitive detection. The problem of false triggering still exists when the panel is greatly deformed in the integrated solution.
A pressure sensor, an elastomer, a capacitance detection component, and a control circuit board are installed inside the touch panel. The elastomer makes contact with the top of the panel, and the conductive foam makes contact with the panel and the capacitor pads to achieve pressure and capacitance detection. The conductive foam design avoids drastic changes in capacitance value when there is large deformation.
It effectively prevents false triggering of capacitive detection caused by touch panel deformation, improves the reliability of pressure sensing, avoids false triggering of capacitive detection, and enhances the overall stability of detection.
Smart Images
Figure CN223743066U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The embodiment of the present disclosure belongs to the technical field of pressure sensing, and particularly relates to a touch structure and an electronic device. BACKGROUND
[0002] At present, the application of capacitive touch function is very common, and is widely applied to the key function of household appliances and daily electronic consumer goods. The application of pressure sensing touch function is also rising, and more and more products in the field of household appliances and consumer electronics use pressure sensing keys. The pressure sensing keys commonly use capacitive touch, pressure touch scheme or capacitive and pressure integrated scheme.
[0003] Among them, the capacitive touch scheme is to set the capacitive sensor in the panel, when the hand touches the panel, the capacitive sensor detects the change of the capacitance to trigger the function, that is, capacitive touch. The pressure touch scheme is to set the pressure sensor in the panel, which can be pasted on the inner wall of the panel or in contact with the panel through the elastic body, when the hand presses the panel, the pressure sensor detects the deformation of the panel to generate a pressure signal, and the pressure sensing detection function is realized. However, the capacitive touch function will fail in the case of wet hands or encountering oil stains and the like, and the capacitive touch panel may also be mis-triggered when there is water on the touch panel. The pressure touch is limited by the fixed mode of the sensor, and the detection range is large.
[0004] The capacitive and pressure integrated scheme is to set the capacitive and pressure touch scheme in the touch panel at the same time, and to realize the control function by detecting the capacitance and pressure recognition. The most commonly used integrated scheme of capacitive and pressure is the conductive silicone top pressure structure, which sets the pressure sensor, the capacitive IC and the capacitive pad on the control circuit board. The pressure sensor is in contact with the touch panel through the conductive silicone to realize pressure detection, and the capacitive pad is also in contact with the touch panel through the conductive silicone to realize the capacitive detection function of the touch panel. However, the conductive silicone top pressure structure scheme, when the panel is pressed too much, the conductive silicone body is severely deformed, and the capacitance value also changes sharply, triggering the capacitive detection value, that is, the capacitive detection function is mis-triggered and fails.
[0005] In view of the above problems, it is necessary to provide a touch structure and an electronic device which are reasonable in design and can effectively improve the above problems. Invention content
[0006] The embodiment of the present disclosure aims to at least solve one of the technical problems existing in the prior art, and provides a touch structure and an electronic device.
[0007] An aspect of the embodiment of the present disclosure provides a touch structure for being arranged in the inside of a touch panel, comprising a pressure sensor, an elastic body, a capacitive detection component and a control circuit board.
[0008] The pressure sensor and the capacitance detection component are arranged on a surface of the control circuit board facing the touch panel.
[0009] The first end of the elastic body is connected with the pressure sensor, and the second end of the elastic body is used to be in contact with the touch panel.
[0010] The capacitance detection component comprises a capacitance IC, a capacitance pad and conductive foam.
[0011] The capacitance IC is arranged on the control circuit board.
[0012] The capacitance pad is arranged in a capacitance identification area of the control circuit board.
[0013] The first end of the conductive foam is connected with the capacitance pad, and the second end of the conductive foam is in contact with the touch panel.
[0014] Optionally, the capacitance pad is arranged around the pressure sensor.
[0015] Optionally, the first end of the conductive foam is provided with a first accommodating groove, and the second end of the conductive foam is provided with a second accommodating groove in communication with the first accommodating groove.
[0016] The first accommodating groove accommodates the pressure sensor, and the second accommodating groove accommodates the elastic body.
[0017] Optionally, the elastic body is fixedly installed on the pressure sensor by being inserted into the second accommodating groove, or the elastic body is attached to the pressure sensor.
[0018] Optionally, the first end of the conductive foam is attached to the capacitance pad.
[0019] Optionally, the pressure sensor has a pressure sensing area in a central region, and the control circuit board is provided with a hollow area corresponding to the pressure sensing area.
[0020] Optionally, the pressure sensing area is multiplexed as a pressing area.
[0021] Optionally, the elastic body is silica gel, rubber, TPU or TPE.
[0022] Optionally, the pressure sensor is a piezoresistive pressure sensor, a piezoelectric sensor or a strain gauge pressure sensor.
[0023] Another aspect of the embodiments of the present disclosure provides an electronic device comprising a touch panel and a touch structure arranged inside the touch panel, wherein the touch structure adopts the touch structure described above.
[0024] The touch structure and the electronic device of the embodiments of the present disclosure, the first end of the elastic body in the touch structure is connected with the pressure sensor, the second end of the elastic body is used for being in contact with the top of the touch panel, when the touch panel is pressed, the elastic body is compressed and deformed, the pressure sensor is also pressed to generate a signal, that is, the pressure detection of the touch panel can be realized; at the same time, when the touch panel is pressed, the capacitance value of the conductive foam and the capacitor pad changes, and the capacitance detection of the panel is realized. When the conductive foam is compressed by large deformation of the touch panel, because the capacitance value of the conductive cloth on the conductive foam changes very little, which is far less than the capacitance value change caused by human touch, therefore, the problem of false touch of the capacitor will not occur. The touch structure integrates pressure sensing and capacitance sensing, effectively prevents the problem of false triggering of capacitance detection caused by deformation of the touch panel, and improves the reliability of pressure sensing detection. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 A cross-sectional view of a touch structure according to an embodiment of the present disclosure;
[0026] Figure 2 A top view of a touch structure according to an embodiment of the present disclosure. DETAILED DESCRIPTION
[0027] In order for those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the embodiments of the present disclosure are further described in detail below with reference to the drawings and specific embodiments.
[0028] The pressure sensing touch structure in the prior art, the capacitance touch in the special case of wet hands or encountering oil stains, the touch function will appear failure, at the same time, the touch panel may also produce false triggering problem when there is water on the touch panel. The pressure sensing touch technology using pressure sensor can avoid the above false touch and failure problems, but the pressure sensing touch is limited by the fixed way of the sensor, which will appear the case of large detection range. Although the integrated scheme of capacitance and pressure sensing can avoid a part of the false touch problem of single capacitance touch and single pressure sensing touch scheme, but in the case of large actual deformation of the panel, there will still be a part of false triggering problem.
[0029] In view of the technical problems of the touch structure in the prior art, as shown in Figure 1 and Figure 2 , an aspect of the embodiments of the present disclosure provides a touch structure 100, which is used for being arranged in the inside of a touch panel 210, and includes a pressure sensor 110, an elastic body 120, a capacitance detection assembly and a control circuit board 130.
[0030] The pressure sensor 110 and the capacitance detection assembly are both arranged on the surface of the control circuit board 130 facing the touch panel 210. The pressure sensor 110 can be mounted on the control circuit board 130 by SMT process.
[0031] The first end of the elastic body 120 is connected with the pressure sensor 110, and the second end of the elastic body 120 is used to be in top pressure contact with the touch panel 210.
[0032] The capacitance detection assembly includes a capacitance IC, a capacitance pad, and the conductive foam 140. The capacitance IC is arranged on the control circuit board 130, the capacitance pad is arranged on the capacitance identification area of the control circuit board 130, and the first end of the conductive foam 140 is connected with the capacitance pad, and the second end of the conductive foam 140 is in top pressure contact with the touch panel 210.
[0033] Specifically, when the touch panel 210 is pressed, the elastic body 120 is compressed and deformed, the pressure sensor 110 is also pressed to generate a signal, and thus the pressure detection of the touch panel 210 can be realized. Meanwhile, the conductive foam 140 is a foam with conductive cloth or conductive tape attached thereon, one side of which is attached to the capacitance identification area arranged on the control circuit board 130, and the other side of which is attached to the touch panel 210. When the panel is pressed, the capacitance capacity on the capacitance pad and the conductive foam 140 changes, the capacitance IC collects the data change and analyzes and processes it, and thus the capacitance induction can be realized. The conductive foam 140 is a foam with conductive cloth or conductive tape attached thereon, and the compression and deformation of the foam will not cause a sharp change in the capacitance capacity on the conductive cloth, so the capacitance will not be triggered by mistake when the touch panel 210 is deformed greatly.
[0034] The touch structure of the embodiment of the present disclosure is characterized in that the first end of the elastic body is connected with the pressure sensor, the second end of the elastic body is used to be in top pressure contact with the touch panel, when the touch panel is pressed, the elastic body is compressed and deformed, the pressure sensor is also pressed to generate a signal, and thus the pressure detection of the touch panel can be realized; meanwhile, when the touch panel is pressed, the capacitance capacity of the conductive foam and the capacitance pad changes, and thus the capacitance detection of the panel can be realized. When the touch panel is deformed greatly to compress the conductive foam, the capacitance capacity of the conductive cloth on the conductive foam changes very little, which is far less than the change in the capacitance capacity caused by the human touch, and thus the capacitance will not be triggered by mistake. The touch structure integrates the pressure induction and the capacitance induction, effectively prevents the capacitance detection from being triggered by mistake due to the deformation of the touch panel, and improves the reliability of the pressure detection.
[0035] For example, in the embodiment, the capacitance pad is arranged around the pressure sensor 110. That is, the capacitance identification area is located around the pressure sensor 110.
[0036] For example, as shown in FIG. 2, the conductive foam 140 is arranged on the control circuit board 130. Figure 1 As shown in FIG. 2, the first end of the conductive foam 140 is provided with a first accommodating groove 141, and the second end of the conductive foam 140 is provided with a second accommodating groove 142 which is in communication with the first accommodating groove 141.
[0037] The first accommodating groove 141 accommodates the pressure sensor 110, and the second accommodating groove 142 accommodates the elastic body 120. The size of the first accommodating groove 141 is greater than the size of the second accommodating groove 142.
[0038] As shown in the embodiment, the shape of the elastic body 120 can be a cylinder. In addition, the material of the elastic body 120 can be silicone, rubber, TPU, TPE or the like. The shape and material of the elastic body 120 are not limited in the embodiment, and can be selected according to actual needs. Figure 2
[0039] In the embodiment, the elastic body 120 can be fixedly installed on the pressure sensor 110 by being inserted into the second accommodating groove 142. Alternatively, the elastic body 120 can be attached to the pressure sensor 110 by double-sided adhesive tape. The connection mode of the elastic body 120 and the pressure sensor 110 is not limited in the embodiment, and can be selected according to actual needs.
[0040] In the embodiment, the first end of the conductive foam 140 can be attached to the capacitor pad by double-sided adhesive tape.
[0041] As shown in the embodiment, the central region of the pressure sensor 110 has a pressure sensing region, and the control circuit board 130 is provided with a hollow area 131 corresponding to the pressure sensing region. In the embodiment, the hollow area is provided on the control circuit board to provide a larger deformation space for the deformation of the pressure sensor 110, thereby improving the detection sensitivity of the pressure sensor 110. Figure 1
[0042] In the embodiment, the pressure sensing region is multiplexed as a top pressure region, and the top pressure region is connected to the elastic body 120.
[0043] In the embodiment, the pressure sensor 110 can be a piezoresistive pressure sensor, a piezoelectric sensor or a strain gauge pressure sensor, etc. The piezoresistive pressure sensor can have a single-bridge, half-bridge or full-bridge Wheatstone bridge structure. The type of the pressure sensor 110 is not limited in the embodiment, and can be selected according to actual needs.
[0044] In the embodiment, the control circuit board 130 can be a PCB circuit board or an FPC circuit board. The type of the control circuit board 130 is not limited in the embodiment, and can be selected according to actual needs.
[0045] Another aspect of the embodiments of the present disclosure provides an electronic device, comprising a touch panel 210 and a touch structure 100 arranged inside the touch panel 210, wherein the touch structure 100 is the touch structure 100 described above. The specific structural features of the touch structure 100 have been described in detail above, and will not be repeated here.
[0046] The electronic device of the embodiments of the present disclosure adopts the touch structure described above, effectively prevents the problem of false triggering of capacitive detection caused by deformation of the touch panel, and effectively improves the reliability of pressure sensing detection.
[0047] It can be understood that the above implementation is only an exemplary implementation adopted for illustrating the principles of the embodiments of the present disclosure, and the embodiments of the present disclosure are not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the embodiments of the present disclosure, and these modifications and improvements are also considered to be within the protection scope of the embodiments of the present disclosure.
Claims
1. A touch structure, configured to be arranged in an inside of a touch panel, characterized in that, The pressure sensor, the elastic body, the capacitance detection assembly and the control circuit board are included. The pressure sensor and the capacitance detection assembly are arranged on the surface of the control circuit board facing the touch panel. The first end of the elastic body is connected with the pressure sensor, and the second end of the elastic body is used to be in contact with the touch panel. The capacitance detection assembly includes a capacitance IC, a capacitance pad and conductive foam. The capacitance IC is arranged on the control circuit board. The capacitance pad is arranged in the capacitance identification area of the control circuit board. The first end of the conductive foam is connected with the capacitance pad, and the second end of the conductive foam is in contact with the touch panel. 2.The touch structure according to claim 1, characterized in that, The capacitance pad is arranged around the pressure sensor. 3.The touch structure according to claim 2, characterized in that, The first end of the conductive foam is provided with a first accommodating groove, and the second end of the conductive foam is provided with a second accommodating groove in communication with the first accommodating groove. The pressure sensor is accommodated in the first accommodating groove, and the elastic body is accommodated in the second accommodating groove. 4.The touch structure according to claim 3, characterized in that, The elastic body is fixedly installed on the pressure sensor by being inserted into the second accommodating groove, or the elastic body is adhered to the pressure sensor.
5. The touch structure according to any one of claims 1 to 4, characterized in that, The first end of the conductive foam is adhered to the capacitance pad. 6.The touch structure according to any one of claims 1 to 4, characterized in that, The pressure sensor has a pressure sensing area in the central area, and the control circuit board is provided with a hollow area corresponding to the pressure sensing area. 7.The touch structure according to claim 6, characterized in that, The pressure sensing area is multiplexed as a pressing area. 8.The touch structure according to any one of claims 1 to 4, characterized in that, The elastic body is silica gel, rubber, TPU or TPE.
9. The touch structure according to any one of claims 1 to 4, characterized in that, The pressure sensor is a piezoresistive pressure sensor, a piezoelectric sensor or a strain gauge pressure sensor.
10. An electronic device, comprising: The touch panel and the touch structure arranged inside the touch panel are included, wherein the touch structure adopts the touch structure according to any one of claims 1 to 9.