A capacitive stylus

Abstract

The utility model discloses a kind of capacitive pens, including bluetooth master control chip, with the power management module, touch module, pen head module, pilot lamp module, buzzer module, motion detection module being connected to the bluetooth master control chip, the bluetooth master control chip is also connected with terminal equipment in Find My network.Relative to prior art, the utility model can effectively improve the positioning accuracy of capacitive pen, it is convenient for user to find back after capacitive pen is lost, improve user experience.

Description

Technical Field

[0001] This utility model relates to the field of capacitive pen technology, and in particular to a capacitive pen with a Find My function. Background Technology

[0002] With the widespread use of smart devices, capacitive pens, as auxiliary tools for touch devices, have become an indispensable accessory in modern people's daily work and life. However, due to their small size and tendency to be forgotten, the problem of losing capacitive pens has gradually become a user's problem, as users cannot easily find them after they are lost. Utility Model Content

[0003] The main purpose of this invention is to provide a capacitive pen that improves the positioning accuracy of the capacitive pen and makes it easier for users to find the pen after it is lost.

[0004] To achieve the above objectives, this utility model provides a capacitive pen, including a Bluetooth master control chip, a power management module, a touch module, a pen tip module, an indicator light module, a buzzer module, and a motion detection module connected to the Bluetooth master control chip. The Bluetooth master control chip is also connected to a terminal device in the Find My network.

[0005] A further technical solution of this utility model is that the Bluetooth master control chip adopts the AC6321A chip.

[0006] A further technical solution of this utility model is that the motion detection module includes a chip U1, a resistor R8, a resistor R14, and a capacitor C4. One end of the resistor R8 is connected to pin 12 of the Bluetooth master control chip, and the other end is connected to pin 12 of the chip U1. One end of the resistor R14 is connected to pin 11 of the Bluetooth master control chip, and the other end is connected to pin 2 of the chip U1. Pin 7 of the chip U1 is connected to one end of the capacitor C4 and pin 5 of the Bluetooth master control chip.

[0007] A further technical solution of this utility model is that the buzzer module includes a resistor R30, a resistor R31, a diode D3, and a MOSFET Q5. One end of the resistor R30 is connected to pin 32 of the Bluetooth main control chip, and the other end is connected to one end of the resistor R31 and the base of the MOSFET Q5. The other end of the resistor R31 is connected to the emitter of the MOSFET Q5 and grounded. The anode of the diode D3 is connected to the collector of the MOSFET Q5.

[0008] A further technical solution of this utility model is that the indicator module includes a resistor R5 and a light-emitting diode D5. One end of the resistor R5 is grounded, and the other end is connected to pin 18 of the Bluetooth main control chip.

[0009] A further technical solution of this utility model is that the touch module includes a diode ESD1, a resistor R13, a resistor R27, a capacitor C2, a capacitor C23, and a chip U5. One end of the diode ESD1 is connected to one end of the resistor R13, and the other end is grounded. The other end of the resistor R13 is connected to pin 1 of the chip U5. One end of the capacitor C2 is connected to pin 3 of the chip U5, and the other end is grounded. One end of the resistor R27 is connected to pin 6 of the chip U5, and the other end is connected to pin 17 of the Bluetooth main control chip. Pins 5 and 4 of the chip U5 are connected to the power management module and one end of the capacitor C23, and the other end of the capacitor C23 is grounded.

[0010] A further technical solution of this utility model is that the power management module adopts an XB3303A chip and a TP4054 charging management chip to prevent overcharging, over-discharging and short circuits.

[0011] A further technical solution of this utility model is that the capacitive stylus is provided with a higher voltage through a DC boost circuit to provide power for generating a periodic square wave signal. The square wave signal is transmitted to the touch screen through the capacitive stylus tip, changing the electric field distribution on the screen surface. The touch screen sensor detects the capacitance change, thereby determining the touch position.

[0012] The beneficial effects of this new capacitive pen are:

[0013] This utility model, through the above-mentioned technical solution, includes a Bluetooth master control chip, a power management module, a touch module, a pen tip module, an indicator light module, a buzzer module, and a motion detection module connected to the Bluetooth master control chip. The Bluetooth master control chip is also connected to terminal devices in the Find My network, which can effectively improve the positioning accuracy of the capacitive pen, facilitate users to find the pen after it is lost, and improve the user experience. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram illustrating the pairing of a preferred embodiment of the capacitive pen of this utility model with an Apple mobile phone;

[0016] Figure 2 This is a flowchart illustrating the preferred embodiment of the capacitive pen of this utility model using Apple mobile phone positioning;

[0017] Figure 3 This is a system block diagram of a preferred embodiment of the capacitive pen of this utility model;

[0018] Figure 4 This is a schematic diagram of the circuit structure of the Bluetooth main control chip;

[0019] Figure 5 This is a schematic diagram of the circuit structure of the motion detection module;

[0020] Figure 6 This is a schematic diagram of the circuit structure of the buzzer module;

[0021] Figure 7 This is a schematic diagram of the circuit structure of the indicator light module;

[0022] Figure 8 This is a schematic diagram of the circuit structure of the touch module;

[0023] Figure 9 This is a schematic diagram of the circuit structure of the power management module;

[0024] Figure 10 This is a schematic diagram of the circuit structure of the pen tip module.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] To address the technical challenges of capacitive pens being small, easily forgotten, and difficult to retrieve once lost, this invention proposes a solution. Leveraging the vast network of Apple devices, Find My enables precise location tracking of the pen. Even outside Bluetooth range, nearby Apple devices can assist in locating it. Find My technology not only solves the problem of preventing pen loss but also enhances the user experience. It requires no additional hardware support, maintaining the convenience and cost-effectiveness of capacitive pens, and represents a significant innovation in anti-loss functionality for modern smart devices.

[0028] The following is an overview of the Find My feature.

[0029] To use the Find My feature, you first need to pair the stylus's main controller with your Apple phone. The pairing process is as follows: Figure 1As shown. After pairing is complete, the user can enable location services. The location service process on an Apple phone is as follows: Figure 2 As shown.

[0030] When the stylus is lost, the Bluetooth main control chip will transmit Bluetooth signals at regular intervals. These signals contain device identification information. Nearby Apple devices or other devices that support Find My network and have the corresponding function enabled will receive this signal and be able to recognize the presence of the stylus with Find My functionality.

[0031] When a user searches for the stylus using the Find My app on an Apple device, the search command is transmitted via Bluetooth. Upon receiving the search command from a nearby Apple device, the Bluetooth controller chip transmits its stored location information and other data to that device via Bluetooth. The Apple device then uploads the data to the iCloud server and finally sends the location information back to the user's app, helping the user determine the stylus's approximate location.

[0032] Specifically, this utility model proposes a capacitive pen with a Find My function, such as... Figure 3 As shown, a preferred embodiment of the capacitive pen of this utility model includes a Bluetooth main control chip, a power management module, a touch module, a pen tip module, an indicator light module, a buzzer module, and a motion detection module connected to the Bluetooth main control chip. The Bluetooth main control chip is also connected to a terminal device in the Find My network.

[0033] In this embodiment, the Bluetooth master control chip is the AC6321A chip.

[0034] The AC6321A chip is a high-performance Bluetooth master control chip that supports the Bluetooth 5.0 standard, ensuring a stable connection and low-power transmission between the capacitive pen and devices (such as Apple iPhones). The AC6321A chip is the core control unit of the capacitive pen, responsible for Bluetooth connection management, data processing from the accelerometer and touch IC, controlling the flashing of the LED indicator, providing real-time feedback on the pen's operating status, and capturing the movement trajectory of the pen tip in real time, providing a smooth writing experience. The circuit diagram of the Bluetooth master control chip is shown below. Figure 4 As shown.

[0035] like Figure 5As shown, in this embodiment, the motion detection module includes a chip U1, a resistor R8, a resistor R14, and a capacitor C4. One end of the resistor R8 is connected to pin 12 of the Bluetooth master control chip, and the other end is connected to pin 12 of the chip U1. One end of the resistor R14 is connected to pin 11 of the Bluetooth master control chip, and the other end is connected to pin 2 of the chip U1. Pin 7 of the chip U1 is connected to one end of the capacitor C4 and pin 5 of the Bluetooth master control chip.

[0036] The Find My protocol incorporates motion detection. When someone else's Find My device is mixed into a user's belongings and tracks them for a certain period (3 days) while separated from the owner's device, the device will automatically activate its g-sensor to detect movement. Once movement is detected, the device will emit an alarm to alert the user that they are being tracked by a Find My device. Conversely, this feature can also detect if someone else is secretly carrying the user's device.

[0037] Furthermore, such as Figure 6 As shown, in this embodiment, the buzzer module includes resistor R30, resistor R31, diode D3, and MOSFET Q5. One end of resistor R30 is connected to pin 32 of the Bluetooth main control chip, and the other end is connected to one end of resistor R31 and the base of MOSFET Q5. The other end of resistor R31 is connected to the emitter of MOSFET Q5 and grounded. The anode of diode D3 is connected to the collector of MOSFET Q5.

[0038] When a capacitive stylus is accidentally misplaced or lost, users can use the device's search function to make the buzzer sound, which helps users easily find the stylus in relatively hidden or noisy environments, avoiding the trouble of wasting time due to the loss of the stylus.

[0039] Furthermore, such as Figure 7 As shown, in this embodiment, the indicator module includes a resistor R5 and a light-emitting diode D5. One end of the resistor R5 is grounded, and the other end is connected to pin 18 of the Bluetooth main control chip.

[0040] In addition to the charging indicator, the capacitive pen has another indicator light to display its working or connection status. When the pen is in normal working condition, the indicator light is on; if the battery is low or no device is connected, the indicator light flashes to alert the user. This allows the user to clearly understand the pen's real-time status.

[0041] Furthermore, such as Figure 8As shown, in this embodiment, the touch module includes a diode ESD1, resistors R13 and R27, capacitors C2 and C23, and a chip U5. One end of the diode ESD1 is connected to one end of the resistor R13, and the other end is grounded. The other end of the resistor R13 is connected to pin 1 of the chip U5. One end of the capacitor C2 is connected to pin 3 of the chip U5, and the other end is grounded. One end of the resistor R27 is connected to pin 6 of the chip U5, and the other end is connected to pin 17 of the Bluetooth main control chip. Pins 5 and 4 of the chip U5 are connected to the power management module and one end of the capacitor C23, and the other end of the capacitor C23 is grounded.

[0042] In this embodiment, the chip U5 uses the D32A21K chip. The D32A21K is a capacitive touch sensor IC capable of accurately recognizing various touch operations, such as single touches and long presses. It triggers the power-on or power-off function of the stylus by monitoring the capacitance change when the user touches the end of the stylus. Furthermore, this chip has excellent anti-interference capabilities, effectively preventing accidental touches. The D32A21K supports a low-power standby mode, automatically entering an energy-saving state when not in use.

[0043] Furthermore, in this embodiment, the power management module employs an XB3303A chip and a TP4054 charging management chip to prevent overcharging, over-discharging, and short circuits. The circuit diagram of the power management module is shown below. Figure 9 As shown.

[0044] This embodiment of the capacitive pen uses the XB3303A chip and the TP4054 charging management chip, providing comprehensive battery protection and intelligent charging control to prevent overcharging, over-discharging, and short circuits. It is equipped with a charging indicator light, which illuminates during charging and automatically turns off when fully charged, allowing users to easily monitor the battery status and extend battery life.

[0045] Furthermore, in this embodiment, the capacitive stylus is supplied with a higher voltage via a DC boost circuit to power the generation of a periodic square wave signal. This square wave signal is transmitted to the touchscreen through the stylus tip, changing the electric field distribution on the screen surface. The touchscreen's sensors detect this capacitance change, thereby determining the touch position. By adjusting the frequency and duty cycle, the capacitive stylus can precisely interact with the touchscreen, achieving sensitive and accurate input and drawing functions. The circuit structure diagram of the stylus tip module in this embodiment is shown below. Figure 10 As shown.

[0046] The beneficial effects of this new capacitive pen are:

[0047] This utility model, through the above-mentioned technical solution, includes a Bluetooth master control chip, a power management module, a touch module, a pen tip module, an indicator light module, a buzzer module, and a motion detection module connected to the Bluetooth master control chip. The Bluetooth master control chip is also connected to terminal devices in the Find My network, which can effectively improve the positioning accuracy of the capacitive pen, facilitate users to find the pen after it is lost, and improve the user experience.

[0048] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A capacitive pen, characterized in that, It includes a Bluetooth master control chip, a power management module, a touch module, a pen tip module, an indicator light module, a buzzer module, and a motion detection module connected to the Bluetooth master control chip. The Bluetooth master control chip is also connected to terminal devices in the Find My network.

2. The capacitive pen according to claim 1, characterized in that, The Bluetooth main control chip is the AC6321A chip.

3. The capacitive pen according to claim 2, characterized in that, The motion detection module includes a chip U1, resistors R8 and R14, and a capacitor C4. One end of resistor R8 is connected to pin 12 of the Bluetooth main control chip, and the other end is connected to pin 12 of chip U1. One end of resistor R14 is connected to the Bluetooth... Pin 11 of the Bluetooth master control chip is connected to pin 2 of the chip U1, and pin 7 of the chip U1 is connected to one end of the capacitor C4 and pin 5 of the Bluetooth master control chip.

4. The capacitive pen according to claim 3, characterized in that, The buzzer module includes resistors R30 and R31, diode D3, and MOSFET Q5. One end of resistor R30 is connected to pin 32 of the Bluetooth main control chip, and the other end is connected to one end of resistor R31 and the base of MOSFET Q5. The other end of resistor R31 is connected to the emitter of MOSFET Q5 and grounded, and the anode of diode D3 is connected to the collector of MOSFET Q5.

5. The capacitive pen according to claim 4, characterized in that, The indicator module includes a resistor R5 and a light-emitting diode D5. One end of the resistor R5 is grounded, and the other end is connected to pin 18 of the Bluetooth main control chip.

6. The capacitive pen according to claim 5, characterized in that, The touch module includes a diode ESD1, resistors R13 and R27, capacitors C2 and C23, and a chip U5. One end of the diode ESD1 is connected to one end of resistor R13, and the other end is grounded. The other end of resistor R13 is connected to pin 1 of chip U5. One end of capacitor C2 is connected to pin 3 of chip U5, and the other end is grounded. One end of resistor R27 is connected to pin 6 of chip U5, and the other end is connected to a pin of the Bluetooth main control chip.

17. Pins 5 and 4 of the chip U5 are connected to the power management module and one end of the capacitor C23, and the other end of the capacitor C23 is grounded.

7. The capacitive pen according to claim 6, characterized in that, The power management module uses an XB3303A chip and a TP4054 charging management chip to prevent overcharging, over-discharging, and short circuits.

8. The capacitive pen according to claim 7, characterized in that, The capacitive pen is powered by a DC boost circuit. The circuit provides a higher voltage to power the generation of a periodic square wave signal, which is then transmitted through the circuit. The capacitive pen tip transmits signals to the touchscreen, changing the electric field distribution on the screen surface. The touchscreen's sensors detect the change in capacitance, thereby determining the touch location.

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