A method for realizing pressure sensing and touch positioning simultaneously, a touch pressure key structure, an analog front end and an electronic cigarette
The touch pressure button structure based on the self-capacitance principle uses the capacitance change between the conductive elastic sheet and the substrate to detect pressure and touch position, solving the problems of high cost and complex circuitry of existing electronic cigarette pressure touch buttons, and achieving a low-cost, highly reliable, and multifunctional interactive effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-19
- Publication Date
- 2026-05-15
AI Technical Summary
Existing pressure-sensitive touch button solutions for electronic cigarettes require high-precision dedicated ADC chips and dedicated sensors, resulting in high costs, complex circuits, and limited functionality, leading to a limited number of mass-produced products.
The touch pressure button structure adopts the self-capacitance principle. It detects pressure and touch position by the capacitance change between the conductive elastic sheet and the substrate. It realizes pressure and touch functions with a single chip, and combines limit post design to prevent excessive deformation and simplify the circuit structure.
It reduces costs, simplifies circuit structure, improves reliability and product aesthetics, is suitable for outdoor equipment and industrial scenarios, prevents moisture and dust intrusion, and supports multi-functional interaction.
Smart Images
Figure CN121356563B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of display screen touch control technology, and in particular to a method for simultaneously realizing pressure sensitivity detection and touch positioning, a touch pressure button structure, a simulation front end, and an electronic cigarette. Background Technology
[0002] Existing electronic cigarette products are typically designed to use physical buttons or pressure-sensitive buttons. Currently, traditional pressure-sensitive button solutions for electronic cigarettes include: thin-film resistors, strain gauges, and piezoelectric ceramics.
[0003] For thin-film resistive and strain gauge pressure sensors, a Wheatstone bridge structure is used, requiring a high-precision ADC chip to read and convert the pressure value.
[0004] For piezoelectric ceramic sensors, the pressure sensor is a piezoelectric ceramic sheet. To improve sensitivity in the low-frequency range, a flexible substrate or elastic support structure is incorporated. A dynamic high-voltage power supply drive circuit is required, employing high-frequency pulse drive technology.
[0005] The aforementioned existing pressure-sensitive touch button solutions all require high-precision dedicated ADC chips and dedicated sensors, or high-voltage chips and dedicated sensors, resulting in relatively high application costs, complex application circuits and product structures, and relatively limited functionality (only a pressing function). This is the main reason why there are currently few mass-produced pressure-sensitive touch button solutions.
[0006] With the continuous development and improvement of electronic cigarette device technology, there is an urgent need for a new electronic cigarette pressure touch button solution to reduce design difficulty and realize the pressing and touch functions. Summary of the Invention
[0007] The purpose of this invention is to provide a method, a touch pressure button structure, a simulated front end, and an electronic cigarette that simultaneously achieve pressure sensitivity detection and touch positioning, thereby solving the technical problems of relatively high application costs, complex application circuits and product structures, and relatively limited functions in existing technologies. The various technical effects of the preferred solutions among the many technical solutions provided by this invention are detailed below.
[0008] To achieve the above objectives, the present invention provides the following technical solution:
[0009] This invention provides a touch pressure button structure, including a pressing member, a conductive elastic sheet, a first substrate, and a touch pressure channel layer. The touch pressure channel layer includes a first touch pressure channel layer and a second touch pressure channel layer. The conductive elastic sheet is fixed to one side of the first touch pressure channel layer and forms a gap space with one side of the second touch pressure channel layer. The first substrate is disposed on the other side of the first touch pressure channel layer and the second touch pressure channel layer. The pressing member is provided with a limiting post, and the conductive elastic sheet is provided with a limiting hole, with the limiting post and the limiting hole transitionally fitted. When the pressing member is pressed, it moves the conductive elastic sheet closer to the first substrate. When the limiting post abuts against the second touch pressure channel layer, the conductive elastic sheet stops deforming and maintains a set distance from the first substrate.
[0010] In one or more embodiments, the touch pressure button structure further includes a driving shielding layer disposed on one side of the first substrate.
[0011] In one or more embodiments, the touch pressure button structure further includes a second substrate, a wiring layer, a third substrate, and a component layer, wherein the driving shielding layer, the second substrate, the wiring layer, the third substrate, and the component layer are sequentially overlapped.
[0012] In one or more embodiments, the number of the conductive elastic sheet and the number of the touch pressure channel layer are equal, and the number of each is at least one.
[0013] As a shared inventive concept, this invention also provides a method for simultaneously realizing pressure sensitivity detection and touch positioning, including the touch pressure button structure described above, a first detection channel disposed in the first touch pressure channel layer, and a second detection channel disposed in the second touch pressure channel layer; the steps performed within one detection cycle include:
[0014] During the initial detection cycle, the first detection channel outputs a ground signal as a reference voltage, and the second detection channel outputs a capacitance detection waveform. Based on the change in capacitance between the second and first detection channels, the magnitude of the pressing pressure corresponding to the touch pressure button structure is calculated.
[0015] During the later detection cycle, both the first detection channel and the second detection channel output the capacitance detection waveform; the touch position corresponding to the touch pressure button structure is determined based on the change in capacitance of the first detection channel.
[0016] In one or more embodiments, the method for simultaneously realizing pressure sensing and touch positioning further includes a third detection channel, wherein within a detection cycle, the third detection channel outputs a waveform with the same voltage, timing, and frequency as the capacitance detection waveform.
[0017] In one or more embodiments, the third detection channel is disposed between the wiring layer and the touch pressure channel layer corresponding to the touch pressure button structure.
[0018] As a shared inventive concept, this invention also provides an analog front end, applied to the method described above for simultaneously realizing pressure detection and touch positioning, including a touch pressure button structure, operational amplifiers CA1, CA2, CA3, and an ADC; the touch pressure button structure is the touch pressure button structure described above, which includes a first detection channel, a second detection channel, and a third detection channel.
[0019] The first detection channel is connected to the input terminal of operational amplifier CA1 via switch SW1 and grounded via switch SW2; the second detection channel is connected to the input terminal of operational amplifier CA2 via switch SW3 and grounded via switch SW4; the third detection channel is connected to the input terminal of operational amplifier CA3 via switch SW5 and grounded via switch SW6. The output terminals of operational amplifiers CA1, CA2, and CA3 are all connected to the ADC. A drive signal is connected between switch SW1 and operational amplifier CA1 via switch SW7; a drive signal is connected between switch SW3 and operational amplifier CA2 via switch SW8; and a drive signal is connected between switch SW5 and operational amplifier CA3 via switch SW9.
[0020] As a shared inventive concept, this invention also provides an electronic cigarette, comprising the aforementioned touch pressure button structure, MCU, motor, and LED light group; the MCU is connected to the touch pressure button structure, motor, and LED light group. The MCU carries a program that implements the aforementioned method for simultaneously realizing pressure detection and touch positioning, as well as the aforementioned analog front end.
[0021] Implementing one of the above-described technical solutions of the present invention has the following advantages or beneficial effects:
[0022] This invention operates based on the principle of self-capacitance. Compared to existing resistive pressure buttons, the piezoelectric ceramic pressure button structure is simpler, requiring no dedicated chip or pressure sensor, resulting in high reliability. A single chip enables both pressure sensing and touch functionality, occupying a small area and reducing cost. Furthermore, it allows for a seamless product design, touch-sensitive sliding, and effectively prevents moisture and dust intrusion, making it suitable for outdoor equipment or industrial applications. Additionally, the integrated design of limiting posts on the outer shell structure prevents excessive deformation of the conductive elastic sheet, effectively preventing damage from excessive pressure and ensuring that capacitance changes remain within a reasonable range while maintaining the elastic sheet's rebound performance. This design ensures accurate detection of capacitance changes while maintaining rebound performance, increasing reliability. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:
[0024] Figure 1 This is a cross-sectional schematic diagram of a touch pressure button structure according to an embodiment of the present invention;
[0025] Figure 2 This is a schematic diagram of a conductive elastic sheet according to an embodiment of the present invention;
[0026] Figure 3 This is a layout design diagram of the TOP (top) layer, L2 layer, L3 layer, and BOTTOM (bottom) layer of a dual-touch pressure button structure according to an embodiment of the present invention.
[0027] Figure 4 This is a schematic cross-sectional view of a dual-touch pressure button structure according to an embodiment of the present invention;
[0028] Figure 5 This is a flowchart of a method for simultaneously implementing pressure sensitivity detection and touch positioning according to an embodiment of the present invention;
[0029] Figure 6 This is a schematic diagram of the detection waveforms corresponding to three channels within one capacitance detection cycle according to an embodiment of the present invention;
[0030] Figure 7 This is an analog front-end circuit diagram according to an embodiment of the present invention;
[0031] Figure 8 This is a schematic diagram of an MCU chip according to an embodiment of the present invention;
[0032] Figure 9 This is a circuit diagram corresponding to a touch pressure button structure connected to an MCU chip according to an embodiment of the present invention;
[0033] Figure 10 This is a motor circuit diagram according to an embodiment of the present invention;
[0034] Figure 11 This is a circuit diagram of two sets of LED lights according to an embodiment of the present invention.
[0035] In the picture:
[0036] 1. Pressing element; 11. Limiting post; 2. Conductive elastic sheet; 21. Limiting hole; 3. First substrate; 4. Touch pressure channel layer; 41. First touch pressure channel layer; 42. Second touch pressure channel layer; 5. Drive shielding layer; 6. Second substrate; 7. Wiring layer; 8. Third substrate; 9. Component layer. Detailed Implementation
[0037] To make the objectives, technical solutions, and advantages of the present invention clearer, various exemplary embodiments described below will be referenced to the accompanying drawings, which form part of the exemplary embodiments, illustrating various exemplary embodiments that may be used to implement the present invention. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. It should be understood that they are merely examples of processes, methods, and apparatuses consistent with some aspects of the present invention disclosed as detailed in the appended claims, and other embodiments may be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and spirit of the present invention.
[0038] In the description of this invention, the term "multiple" means two or more. The terms "connected" and "linked" should be interpreted broadly, for example, they can refer to fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, communication connections, direct connections, indirect connections via an intermediate medium, or connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0039] To illustrate the technical solution described in this invention, specific embodiments are described below, showing only the parts related to the embodiments of this invention.
[0040] Example 1: As Figures 1-2 As shown, a touch pressure button structure of this embodiment includes a pressing member 1, a conductive elastic sheet 2, a first substrate 3, and a touch pressure channel layer 4. The touch pressure channel layer 4 includes a first touch pressure channel layer 41 and a second touch pressure channel layer 42. Wherein,
[0041] The conductive elastic sheet 2 is fixed to one side of the first touch pressure channel layer 41 and forms a gap space with one side of the second touch pressure channel layer 42. The first substrate 3 is disposed on the other side of the first touch pressure channel layer 41 and the second touch pressure channel layer 42. The pressing member 1 is provided with a limiting post 11 and the conductive elastic sheet 2 is provided with a limiting hole 21. The limiting post 11 and the limiting hole 21 are fitted together.
[0042] Based on the above embodiments, when the pressing member 1 is pressed, the conductive elastic sheet 2 moves closer to the first substrate 3. When the limiting post 11 abuts against the second touch pressure channel layer 42, the conductive elastic sheet 2 stops deforming and maintains a set distance from the first substrate 3. The distance the limiting post 11 moves is the downward pressing distance between the plates of the capacitor formed by the conductive elastic sheet 2 and the first substrate 3 when the conductive elastic sheet 2 is pressed. When the conductive elastic sheet 2 is not pressed, the vertical distance corresponding to the above-mentioned gap space is the initial distance between the conductive elastic sheet 2 and the first substrate 3.
[0043] This application utilizes two self-capacitance channel electrodes (a first touch pressure channel layer and a second touch pressure channel layer) to differentially connect with a conductive elastic sheet 2 to form a parallel plate capacitor structure.
[0044] In some specific embodiments, the conductive elastic sheet 2 can be a steel sheet made of 304 stainless steel with an arc-shaped structure, and the first substrate 3 can be a pad based on a PCB board. The pressure sensor achieves its pressing function by utilizing the elastic properties and deformation changes of the 304 stainless steel material to approach the PCB pads.
[0045] In some specific embodiments, the pressing element 1 can directly serve as the housing of the touch pressure button structure of this application. Furthermore, compared with traditional buttons, the housing design does not require openings on the housing surface, which can improve the integrity and aesthetics of the panel, and also reduce the risk of dust and moisture entering the device.
[0046] In some specific embodiments, the pressing member 1 (i.e. the outer shell structure) is designed with a limiting post 11 that passes through the conductive elastic sheet 2. The conductive elastic sheet 2 forms a touch pressure electrode through an arc-shaped structure (square / round shape), which can flexibly arrange the touch pressure area.
[0047] Furthermore, the limiting post 11 controls the downward pressure within the range of 0.1-0.15mm to avoid excessive deformation of the steel sheet. This effectively prevents damage to the steel sheet due to excessive deformation caused by excessive downward pressure, while ensuring that the capacitance change is within a reasonable range and maintaining the resilience of the steel sheet. The design ensures both accurate detection of capacitance change and maintenance of resilience. The self-capacitance channel achieves pressure sensing by detecting changes in the distance between the conductive elastic sheet 2 and the first substrate 3 (capacitance value changing from high to low).
[0048] Understandably, when a finger presses the outer casing (pressing element), the conductive elastic sheet 2 deforms towards the first substrate 3, shortening the distance between it and the first substrate 3, resulting in a decrease in capacitance. When used as a sensor, this capacitance characteristic is utilized, taking advantage of the change in electric field caused by the change in the medium.
[0049] Based on the physical characteristics of capacitive sensors, pressure is sensed by detecting changes in capacitance of the touch pressure button structure in this application using the following formula:
[0050] (1);
[0051] Where C: capacitance (F) Free space dielectric constant (8.854 pF / m). A: Relative permittivity (unitless), A: Plate area (m²) 2 ), d: plate spacing (m).
[0052] Determine based on the materials shown in Table 1 below:
[0053] Table 1 Correspondence table of values between different materials
[0054]
[0055] Based on the above formula and the touch pressure button structure of this application, the capacitance between the two electrodes is affected by the electrode spacing, the dielectric constant of the electrode material, and the effective area of the electrodes facing each other (plate area A). The capacitance is inversely proportional to the electrode spacing and directly proportional to the dielectric constant and area. The capacitance changes linearly with respect to the area and distance of the electrodes: capacitance C = (εS) / (d) (where ε is the dielectric constant between the plates, S is the area of the plates facing each other, and d is the distance between the plates). Once these structural parameters are determined, the capacitance change is converted into measurable signals such as voltage and current. The capacitance C is then a constant.
[0056] In this embodiment, the distance the limiting post moves is the distance between the plates. Therefore, the conductive elastic sheet 2 and the first substrate 3 corresponding to the touch channel electrodes form a capacitor, and the capacitance of a single electrode to the circuit ground network is measured. When the target approaches, the capacitance of the electrode to ground increases, which is equivalent to adding a new capacitor in parallel with the existing capacitor. The capacitance change caused by the downward pressure is determined by measuring this total capacitance change.
[0057] Furthermore, such as Figure 1 and Figure 3 As shown, the touch pressure button structure of this application further includes a drive shielding layer 5, a second substrate 6, a wiring layer 7, a third substrate 8, and a component layer 9. Among them,
[0058] A driving shielding layer 5 is disposed on one side of the first substrate 3, and the driving shielding layer 5, the second substrate 6, the wiring layer 7, the third substrate 8, and the component layer 9 are sequentially overlapped. Thus, a corresponding 4-layer structure is formed, consisting of a TOP (top) layer (component), an L2 layer (wiring), an L3 layer (driving shield), and a BOTTOM (bottom) layer (touch pressure channel).
[0059] It should be noted that the TOP layer is the component placement layer, the L2 layer is the trace connection layer, the L3 layer is the reference channel layer, and the BOTTOM layer is the touch pressure channel. The BOTTOM layer serves as the touch pressure channel for the conductive spring contact. The driver shielding laid on the L3 layer effectively isolates the coupling and interference brought by the L2 layer traces and GND, and isolates the upper layer from interference to the BOTTOM layer touch channel.
[0060] In some specific embodiments, the number of conductive elastic sheets 2 and touch pressure channel layers 4 are equal (one conductive elastic sheet corresponds to one touch pressure channel layer), and the number of each is at least one.
[0061] Figure 4 This diagram illustrates a dual-touch pressure button structure. By adding a set of pressure-sensitive channels (i.e., adding a conductive elastic sheet and a touch pressure channel layer), the buttons can achieve surface touch sliding functionality when arranged sequentially. The outer shell surface features a slightly concave design, creating a seamless surface. Compared to traditional perforated buttons, this not only improves the integrity and aesthetics of the panel but also reduces the risk of dust and moisture entering the device.
[0062] In summary, this application operates based on the self-capacitance principle. Compared to existing resistive pressure buttons, the piezoelectric ceramic pressure button structure is simpler, requiring no dedicated chip or pressure sensor, resulting in high reliability. A single chip enables both pressure sensing and touch functionality, occupying a small board area and reducing cost. Furthermore, it allows for an integrated product appearance, touch-sensitive sliding, and effectively prevents moisture and dust intrusion, making it suitable for outdoor equipment or industrial applications. Additionally, the integrated design of limiting posts on the shell structure prevents excessive deformation of the conductive elastic sheet, effectively preventing damage from excessive pressure and ensuring that capacitance changes remain within a reasonable range while maintaining the elastic sheet's rebound performance. This design ensures accurate detection of capacitance changes while maintaining rebound performance, thus increasing reliability.
[0063] Example 2: Figures 5-6 As shown, with the same inventive concept, this embodiment provides a method for simultaneously realizing pressure detection and touch positioning, including the touch pressure button structure described in Embodiment 1, a first detection channel T1 arranged in the first touch pressure channel layer, and a second detection channel T2 arranged in the second touch pressure channel layer.
[0064] Based on the above embodiments, the steps performed within a detection cycle include:
[0065] S100. During the initial detection cycle, the first detection channel outputs a ground signal as a reference voltage, and the second detection channel outputs a capacitance detection waveform. Based on the change in capacitance between the capacitors of the second and first detection channels, the magnitude of the pressing pressure corresponding to the touch pressure button structure is calculated.
[0066] In a specific embodiment, a capacitance detection cycle is 10ms, with the first 5ms being the initial detection cycle and the last 5ms being the final detection cycle. For the first detection channel T1 and the second detection channel T2, the first 5ms are the pressure button capacitance detection time, and the last 5ms are the finger touch detection time.
[0067] Furthermore, the magnitude of the pressing force P corresponding to the pressure-sensitive button structure is calculated based on the rate of change of charge detected within the first 5ms, and the formula is as follows:
[0068] (2);
[0069] From the above formula (1) and the formula C=Q (charge) / U (voltage), we can obtain the charge Q=C U, thus we get:
[0070] = C U (3);
[0071] The change in charge during the initial detection cycle. The change in capacitance C during the initial detection cycle.
[0072] Therefore, according to formula (1), the capacitance C1 of the touch pressure button structure before pressing is detected by the first detection channel T1, and the capacitance C2 of the touch pressure button structure after pressing is detected by the second detection channel T2. By multiplying the difference between C1 and C2 by the voltage of the capacitance detection waveform, the magnitude P of the pressing force corresponding to the touch pressure button structure can be obtained by formula (2).
[0073] S200. During the later detection cycle, both the first and second detection channels output capacitance detection waveforms; the touch position corresponding to the touch pressure button structure is determined based on the change in capacitance of the first detection channel.
[0074] Understandably, the pressure detection in the first 5ms involves the formation of capacitance between the first detection channel T1 and the second detection channel T2. When a finger presses the outer shell, the distance between them changes, causing a corresponding change in the capacitance of the first detection channel T1 and the second detection channel T2. Detecting this change in capacitance allows us to determine the pressure applied. In the subsequent 5ms capacitance detection cycle, the first detection channel T1 and the second detection channel T2 simultaneously output waveforms with the same voltage, timing, and frequency. This ensures that there is no voltage difference between the first detection channel T1 and the second detection channel T2 at any given time. When a finger approaches the first detection channel T1, the capacitance increases. Single-point touch positioning is achieved by detecting the change in capacitance of the first detection channel T1.
[0075] In a specific embodiment, a third detection channel T3 is also included. Within one detection cycle, the output of the third detection channel has the same voltage, timing, and frequency as the capacitance detection waveform. The third detection channel is positioned between the wiring layer corresponding to the touch pressure button structure and the touch pressure channel layer (touch channel).
[0076] Understandably, the third detection channel T3 is positioned between the L2 layer (trace layer) and the BOTTOM layer (touch pressure channel layer), covering the back of the touch pressure channel layer traces, with a very small distance between them. If the first detection channel T1 and the second detection channel T2 are close to the grounding and high-frequency traces of the L2 and TOP layers, the touch channel will generate a large load capacitance and interference. When the load capacitance of the touch channel is large, the sensitivity to changes in capacitance will decrease, or even become unusable. Therefore, the detection waveform of the third detection channel T3 is adjusted accordingly, such as... Figure 6 As shown, in one capacitance detection cycle (10ms), the third detection channel T3 outputs a waveform with the same voltage, timing, and frequency as the first detection channel T1 and the second detection channel T2. This ensures there is no voltage difference between the third and second channels at any given time, thus effectively improving the sensitivity of capacitance changes.
[0077] In a specific embodiment, when the capacitance detected by the first detection channel T1 no longer changes linearly with the increase of voltage, the output voltage of the first detection channel T1 is lower than the low voltage detection waveform of the capacitance detection waveform during the previous detection period.
[0078] Considering that charge buildup on the outer casing (the pressing component described in Embodiment 1) under continuous pressure may lead to decreased detection accuracy or failure, and because charge buildup occurs when a finger presses on the casing, and the capacitance of the first detection channel T1, when connected to the conductive elastic sheet, no longer changes linearly with voltage increases, a self-capacitance saturation phenomenon occurs. In this embodiment, when saturation is detected by an operational amplifier, the ground signal output from the first detection channel T1 for the first 5ms is converted into a 1V low-voltage detection waveform. When the MCU detects saturation, the first detection channel T1 outputs a 1V low-voltage detection output, forming a protection mechanism for the detection channel under saturation conditions.
[0079] In summary, the method described in this application utilizes three self-capacitance channels combined with the touch pressure button structure described in Embodiment 1 to form an integrated detection capacitor, eliminating the need for additional pressure sensing mounting components. Furthermore, the three self-capacitance channels are differentially combined to simultaneously emit their respective different detection voltage signals, forming an effective combination of pressure detection, touch positioning, and interference isolation.
[0080] Example 3: Figure 7As shown, following the same inventive concept, this embodiment provides a simulated front end applied to a method for simultaneously realizing pressure detection and touch positioning as described in Embodiment 2. It includes the touch pressure button structure, operational amplifiers CA1, CA2, and CA3, and an ADC as described in Embodiment 1. The touch pressure button structure includes a first detection channel, a second detection channel, and a third detection channel. Specifically,
[0081] The first detection channel is connected to the input of operational amplifier CA1 via switch SW1 and grounded via switch SW2; the second detection channel is connected to the input of operational amplifier CA2 via switch SW3 and grounded via switch SW4; the third detection channel is connected to the input of operational amplifier CA3 via switch SW5 and grounded via switch SW6. The outputs of operational amplifiers CA1, CA2, and CA3 are all connected to the ADC. A drive signal is connected between switch SW1 and operational amplifier CA1 via switch SW7; a drive signal is connected between switch SW3 and operational amplifier CA2 via switch SW8; and a drive signal is connected between switch SW5 and operational amplifier CA3 via switch SW9.
[0082] Example 4: Figures 8-11 As shown, with the same inventive concept, this embodiment provides an electronic cigarette that implements a complete application scheme such as pressure-sensitive buttons, vibration feedback, and light group effects on a single chip, including a touch pressure button structure, MCU, motor, and LED light group as described in Embodiment 1. The MCU is connected to the touch pressure button structure, motor, and LED light group.
[0083] In a specific embodiment, the MCU is equipped with a program that implements the method for simultaneously realizing pressure detection and touch positioning as described in Embodiment 2, and an analog front end as described in Embodiment 3.
[0084] Furthermore, pins 23 and 24 of the MCU are connected to the first detection channel T1 and the second detection channel T2 of the touch pressure button structure TK via impedance matching resistors R3 and R2, respectively. When a finger presses the outer shell, it presses down on the touch pressure button structure TK, changing the capacitance value between the electrode and the PCB. The MCU detects the change in capacitance, calculates the pressure intensity, analyzes the capacitance signal, and identifies the press and force level. Simultaneously, pin 29 of the MCU is connected to the gate of N_MOS transistor Q2. When identifying the press and force level, it outputs a level signal to drive the motor to vibrate. The drain of N_MOS transistor Q2 is connected to the motor drive port, and the source of N_MOS transistor Q2 is grounded.
[0085] Furthermore, the MCU synchronously controls the LED light groups to achieve multi-mode lighting effect feedback and the correspondence between LED light groups. It controls one of the two light groups (in the example, LEDs D31, D33, D34, D35, D36, D37, D38, D39, and D43 form one group, and LEDs D40, D32, D41, D42, D48, D47, D46, D45, and D44 form the other group) to display, thereby achieving intelligent control of the light group display and improving the accuracy of the light group display control. When idle, it enters a low-power detection mode using an interrupt wake-up mechanism to quickly respond to touch press operations.
[0086] Of course, the electronic cigarette in this embodiment also includes other structures that realize all the functions of the electronic cigarette, including but not limited to USB and charging structures. Other structures can be consistent with the prior art, and will not be described in detail here.
[0087] In summary, this embodiment achieves a unified product appearance with a single chip, incorporating interactive methods such as touch swiping, pressure and vibration feedback, and lighting effects. Its seamless design effectively prevents moisture and dust intrusion, making it suitable for outdoor equipment or industrial scenarios. It enhances the technological feel and aesthetics. It supports operation while wearing gloves and features a built-in compensation algorithm to adjust sensitivity according to different loads and temperature changes, adapting to various environmental needs.
[0088] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the processes of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.
[0089] The above description is merely a preferred embodiment of the present invention. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.
Claims
1. A touch pressure button structure, characterized in that, It includes a pressing element, a conductive elastic sheet, a first substrate, and a touch pressure channel layer, wherein the touch pressure channel layer includes a first touch pressure channel layer and a second touch pressure channel layer; The conductive elastic sheet is fixed to one side of the first touch pressure channel layer and forms a gap space with one side of the second touch pressure channel layer. The first substrate is disposed on the other side of the first touch pressure channel layer and the second touch pressure channel layer. The pressing member is provided with a limiting post, and the conductive elastic sheet is provided with a limiting hole. The limiting post and the limiting hole are in transition fit. When the pressing member is pressed, the conductive elastic sheet is moved closer to the first substrate. When the limiting post abuts against the second touch pressure channel layer, the conductive elastic sheet stops deforming and maintains a set distance from the first substrate. It also includes a first detection channel, a second detection channel, a third detection channel, and a wiring layer. The first detection channel is arranged in the first touch pressure channel layer, the second detection channel is arranged in the second touch pressure channel layer, and the third detection channel is arranged between the wiring layer and the touch pressure channel layer corresponding to the touch pressure button structure. Within one detection cycle, the third detection channel outputs a waveform with the same voltage, the same timing, and the same frequency as the capacitance detection waveform.
2. The touch pressure button structure according to claim 1, characterized in that, It also includes a drive shielding layer disposed on one side of the first substrate.
3. The touch pressure button structure according to claim 2, characterized in that, It also includes a second substrate, a third substrate, and a component layer, wherein the driving shielding layer, the second substrate, the wiring layer, the third substrate, and the component layer are sequentially overlapped.
4. A touch pressure button structure according to any one of claims 1-3, characterized in that, The number of the conductive elastic sheet and the number of the touch pressure channel layer are equal, and each has at least one.
5. A method for simultaneously achieving pressure sensitivity detection and touch positioning, characterized in that, Including the touch pressure button structure as described in any one of claims 1-4; the steps performed within one detection cycle include: During the initial detection cycle, the first detection channel outputs a ground signal as a reference voltage, and the second detection channel outputs the capacitance detection waveform; based on the change in capacitance between the second and first detection channels, the magnitude of the pressing pressure corresponding to the touch pressure button structure is calculated. During the later detection cycle, both the first detection channel and the second detection channel output the capacitance detection waveform; the touch position corresponding to the touch pressure button structure is determined based on the change in capacitance of the first detection channel.
6. The method for simultaneously realizing pressure sensitivity detection and touch positioning according to claim 5, characterized in that, When the capacitance detected by the first detection channel no longer changes linearly with the increase of voltage, during the previous detection cycle, the output voltage of the first detection channel is lower than the low voltage detection waveform of the capacitance detection waveform.
7. A simulated front end, characterized in that, The method for simultaneously realizing pressure sensitivity detection and touch positioning as described in any one of claims 5-6 includes a touch pressure button structure, operational amplifiers CA1, CA2, CA3, and an ADC; wherein the touch pressure button structure is a touch pressure button structure as described in any one of claims 1-4; The first detection channel is connected to the input terminal of the operational amplifier CA1 via switch SW1 and grounded via switch SW2; The second detection channel is connected to the input terminal of the operational amplifier CA2 via switch SW3, and grounded via switch SW4; The third detection channel is connected to the input terminal of the operational amplifier CA3 via switch SW5 and grounded via switch SW6; The outputs of op-amp CA1, op-amp CA2, and op-amp CA3 are all connected to the ADC; A drive signal is connected between switch SW1 and operational amplifier CA1 via switch SW7; A drive signal is connected between switch SW3 and operational amplifier CA2 via switch SW8; A drive signal is connected between switch SW5 and operational amplifier CA3 via switch SW9.
8. An electronic cigarette, characterized in that, Includes a touch pressure button structure as described in any one of claims 1-4, an MCU, a motor, and an LED light group; the MCU is connected to the touch pressure button structure, the motor, and the LED light group. The MCU is equipped with a program that implements the method for simultaneously realizing pressure detection and touch positioning as described in any one of claims 5-6, and an analog front end as described in claim 7.