Electronic device touch sensitivity control circuit

Abstract

The utility model relates to control circuit technical field especially relates to an electronic equipment touch sensitivity control circuit, include: power connection end, CPU connection end, touch chip, voltage -controlled variable capacitance, touch button, wherein, touch chip is connected with power connection end, CPU connection end, voltage -controlled variable capacitance, touch button respectively, voltage -controlled variable capacitance is connected with CPU connection end, touch button respectively also. Through CPU setting circuit voltage value size and then control voltage -controlled variable capacitance's capacitance value size to reach the purpose that the sensitivity of touch button of electronic equipment is adjusted flexibly and is adjusted to the best use state suitable for user.

Description

Technical Field

[0001] This utility model relates to the field of control circuit technology, and in particular to a touch sensitivity control circuit for electronic devices. Background Technology

[0002] With the rapid development of technology, the sensitivity of touch buttons in miniaturized wearable electronic devices (such as smartwatches, bracelets, and AR glasses) is crucial. Their core function is to accurately and reliably detect subtle user touch intentions, enabling smooth human-computer interaction. External factors can affect the user experience; for example, humid or low-temperature environments, or oily or sweaty hands can reduce touch button sensitivity, leading to sluggish electronic devices and requiring repeated touches for a successful response. Therefore, there is an urgent need for a technology that can flexibly adjust the sensitivity of touch buttons on electronic devices to achieve optimal user experience based on different usage scenarios. Utility Model Content

[0003] This invention provides a touch sensitivity control circuit for electronic devices, which solves the problem that the touch buttons of electronic devices in the prior art will become less sensitive and slow to respond due to complex external environmental factors, and realizes the ability to flexibly adjust the sensitivity of touch buttons to the optimal usage state according to the user's usage environment.

[0004] This utility model provides a touch sensitivity control circuit for an electronic device, including: a power connection terminal, a CPU connection terminal, a touch chip, a voltage-controlled variable capacitor, and touch buttons;

[0005] The touch chip is connected to the power supply terminal, the CPU terminal, the voltage-controlled variable capacitor, and the touch button, respectively. The voltage-controlled variable capacitor is also connected to the CPU terminal and the touch button, respectively.

[0006] According to the present invention, an electronic device touch sensitivity control circuit is provided, wherein the touch chip has 5 pins, the TCH pin is connected to the touch button through a first resistor, the OC pin is connected to the CPU connection terminal, the VDD pin is connected to the power supply connection terminal, and the GND pin and CFG pin are grounded respectively.

[0007] According to the touch sensitivity control circuit of the electronic device provided by this utility model, the OC pin of the touch chip is also connected to the power supply terminal through a second resistor, the TCH pin is also connected to a voltage-controlled variable capacitor, and the VDD pin is also grounded through a second capacitor.

[0008] According to the present invention, a touch sensitivity control circuit for an electronic device is provided, wherein the voltage-controlled variable capacitor has 5 pins, the VT pin is connected to the CPU terminal through the fourth, fifth and sixth resistors in parallel, the PORT1 pin is connected to the TCH pin of the touch chip through the first capacitor, the NC pin is left floating, and the GND pin and PORT2 pin are grounded respectively.

[0009] According to the touch sensitivity control circuit for an electronic device provided by this utility model, the VT pin of the voltage-controlled variable capacitor is also grounded through a third resistor.

[0010] The electronic device touch sensitivity control circuit provided by this utility model controls the capacitance value of the voltage-controlled variable capacitor by setting the circuit voltage value through the CPU, thereby flexibly adjusting the sensitivity of the touch buttons of the electronic device and adjusting it to the best usage state suitable for the user. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 This is a circuit diagram of the touch sensitivity control circuit for electronic devices provided by this utility model;

[0013] Figure 2 This is an electrical block diagram of the touch sensitivity control circuit for electronic devices provided by this utility model. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] The following is combined Figures 1-2 This invention describes a touch sensitivity control circuit for an electronic device, comprising: a power connection terminal, a CPU connection terminal, a touch chip U1, a voltage-controlled variable capacitor CV, and a touch button TP;

[0016] The touch chip U1 is connected to the power supply terminal, the CPU terminal, the voltage-controlled variable capacitor CV, and the touch button TP. The voltage-controlled variable capacitor CV is also connected to the CPU terminal and the touch button TP.

[0017] Furthermore, the touch chip U1 is model HK11BP, which has 5 pins: TCH pin, OC pin, CFG pin, VDD pin, and GND pin. The TCH pin of the touch chip U1 is connected to the touch button TP through the first resistor R1, the OC pin is connected to the CPU connection terminal, the VDD pin is connected to the power supply connection terminal, and the GND pin and CFG pin are grounded respectively.

[0018] Furthermore, the OC pin of the touch chip U1 is also connected to the power supply terminal through the second resistor R2, the TCH pin is also connected to the voltage-controlled variable capacitor CV, and the VDD pin is also grounded through the second capacitor C2.

[0019] In this embodiment, the OC pin of the touch chip U1 is the sensitivity signal output pin of the touch button TP. The strength of this sensitivity signal determines the functional response level of the touch button of the electronic device after it is touched.

[0020] The voltage-controlled variable capacitor CV has the model number LXRW19V330-050 and has 5 pins: NC pin, VT pin, GND pin, PORT1 pin, and PORT2 pin. The VT pin of the voltage-controlled variable capacitor CV is connected to the CPU terminal through the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 in parallel. The PORT1 pin is connected to the TCH pin of the touch chip U1 through the first capacitor C1. The NC pin is left floating, and the GND pin and PORT2 pin are grounded respectively.

[0021] Furthermore, the VT pin of the voltage-controlled variable capacitor CV is also grounded through a third resistor R3.

[0022] As its name suggests, the voltage-controlled variable capacitor (CV) is a capacitor whose capacitance value can be flexibly adjusted. The smaller the capacitance value, the more significant the voltage change caused by a unit charge, thus amplifying the signal fluctuations caused by the touch button TP, making it easier for the system to detect and respond quickly. The voltage value of the VT pin of the voltage-controlled variable capacitor CV determines its capacitance value, which in turn affects the sensitivity signal strength output by the OC pin of the touch chip U1. The larger the voltage value of the VT pin of the voltage-controlled variable capacitor CV and the smaller the capacitance value of the voltage-controlled variable capacitor CV, the higher the sensitivity signal strength output by the OC pin of the touch chip U1, and the more sensitive the function triggered by the touch button TP. Conversely, the function triggered by the touch button TP will be relatively sluggish.

[0023] In a specific embodiment, the CPU has three voltage control pins: IO1, IO2, and IO3. IO1 controls the voltage applied to the fourth resistor R4, IO2 controls the voltage applied to the fifth resistor R5, and IO3 controls the voltage applied to the sixth resistor R6. The voltage values ​​of the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 are connected in parallel and then divided by the third resistor R3 to form the voltage applied to the VT pin of the voltage-controlled variable capacitor CV. When the capacitance value of the voltage-controlled variable capacitor CV is relatively small, the TCH pin of the touch chip U1 is strongly sensitive to the function trigger signal received from the touch button TP due to the capacitance value of the voltage-controlled variable capacitor CV. This results in a higher sensitivity signal strength output by the OC pin of the touch chip U1. Similarly, if the user feels that the electronic device is too sensitive to the current environment, they can lower the system voltage to increase the capacitance value of the voltage-controlled variable capacitor CV. In this case, the voltage-controlled variable capacitor CV has a stronger charge storage capacity, and the voltage fluctuation caused by the external trigger signal to the circuit is smaller. This results in a lower function trigger signal strength received by the TCH pin of the touch chip U1, which in turn reduces the sensitivity signal strength output by the OC pin of the touch chip U1 to adapt to the current environment.

[0024] Furthermore, the resistance values ​​of the third resistor R3, the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 are all different. Users can apply different voltage values ​​to each resistor via the CPU's three voltage control pins (this can be done with single-pin control or by freely combining multiple pins to control the voltage output, giving the CPU multi-level control functionality), thereby controlling the voltage value of the VT pin of the voltage-controlled variable capacitor CV. The sensitivity of the touch button TP can be flexibly adjusted according to the usage scenario and the user's hand position, ensuring timely response and triggering of corresponding functions.

[0025] In this embodiment, when a user needs to trigger the touch button TP to activate the relevant functions of the electronic device, the historical sensitivity level of the touch button TP can be maintained. If the device responds promptly on the first trigger, it can be assumed that the sensitivity signal strength output by the OC pin of the touch chip U1 is just suitable for the user's usage scenario, and there is no need to adjust the sensitivity of the touch button TP. However, if the user triggers the touch button TP for the first time or repeatedly and the corresponding function of the electronic device cannot respond promptly, it indicates that the sensitivity signal strength output by the OC pin of the touch chip U1 is low, resulting in a sluggish response of the touch button TP, which cannot meet the user's usage scenario. In this case, the CPU needs to increase the voltage value of the VT pin of the voltage-controlled variable capacitor CV, thereby reducing its capacitance value. This enhances the sensitivity signal strength output by the OC pin of the touch chip U1. Therefore, after the CPU finishes adjusting the voltage, the sensitivity of the touch button TP will increase, and when the user triggers the touch button TP again, the electronic device will respond promptly and execute the corresponding function quickly.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A touch sensitivity control circuit for an electronic device, characterized in that, include: Power connector, CPU connector, touch chip, voltage-controlled variable capacitor, touch buttons; The touch chip is connected to the power supply terminal, the CPU terminal, the voltage-controlled variable capacitor, and the touch button, respectively. The voltage-controlled variable capacitor is also connected to the CPU terminal and the touch button, respectively.

2. The electronic device touch sensitivity control circuit according to claim 1, characterized in that, The touch chip has 5 pins. Its TCH pin is connected to the touch button through the first resistor, the OC pin is connected to the CPU terminal, the VDD pin is connected to the power supply terminal, and the GND pin and CFG pin are grounded respectively.

3. The electronic device touch sensitivity control circuit according to claim 2, characterized in that, The OC pin of the touch chip is also connected to the power supply terminal through a second resistor, the TCH pin is also connected to a voltage-controlled variable capacitor, and the VDD pin is also grounded through a second capacitor.

4. The electronic device touch sensitivity control circuit according to claim 3, characterized in that, The voltage-controlled variable capacitor has 5 pins. Its VT pin is connected to the CPU terminal through the fourth, fifth and sixth resistors in parallel. The PORT1 pin is connected to the TCH pin of the touch chip through the first capacitor. The NC pin is left floating. The GND pin and PORT2 pin are grounded respectively.

5. The electronic device touch sensitivity control circuit according to claim 4, characterized in that, The VT pin of the voltage-controlled variable capacitor is also grounded through a third resistor.

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