Double-battery power supply circuit, stylus circuit and stylus

Abstract

The utility model relates to the technical field of touch pens, and discloses a double-battery power supply circuit, a touch pen circuit and a touch pen, the double-battery power supply circuit comprises a first battery, a first battery management system, a second battery, a second battery management system and a control circuit, the output end of the first battery is connected with the first end of the first battery management system; the output end of the second battery is connected with the first end of the second battery management system; the second end of the first battery management system is connected with the power supply end of the first load; the second end of the second battery management system is connected with the first end of the control circuit; the second end of the control circuit is connected with the control end of the first load, and the third end of the control circuit is connected with the control end of the second load; the instantaneous power of the first load is higher than the instantaneous power of the second load. According to the utility model, the two batteries can be used for supplying power to the motor and other functional modules of the stylus respectively, so that the problem of unstable power supply of other functional modules caused by high-power load work is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of touch pens, and in particular to a dual-battery power supply circuit, a touch pen circuit and a touch pen. Background Art

[0002] Currently, electronic styluses meet user demands for vibration feedback by adding motors. To achieve the crisp, responsive vibration of keystrokes, the motor's drive voltage must be increased during design. The motor's internal resistance is relatively low, and the instantaneous current it requires from the battery is high. However, most existing styluses have small-capacity batteries, which can easily lead to the following issues when the motor vibrates:

[0003] 1. The stylus's lithium battery protection IC activated overcurrent protection, causing the stylus system to stop working.

[0004] 2. When the battery voltage is low, suddenly starting the motor can easily cause the battery voltage to drop suddenly to a voltage where the entire stylus system cannot operate, causing the entire system to crash. Utility Model Content

[0005] Therefore, the technical problem to be solved by the present invention is to solve the problem of unstable battery power supply caused by the operation of the instantaneous high-power module in the device in the prior art, thereby providing a dual-battery power supply circuit, a stylus circuit and a stylus.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0007] In a first aspect, the utility model provides a dual-battery power supply circuit, comprising: a first battery, a first battery management system, a second battery, a second battery management system, and a control circuit, wherein the output end of the first battery is connected to the first end of the first battery management system; the output end of the second battery is connected to the first end of the second battery management system; the second end of the first battery management system is connected to the power supply end of the first load; the second end of the second battery management system is connected to the first end of the control circuit; the second end of the control circuit is connected to the control end of the first load, and the third end of the control circuit is connected to the control end of the second load; the instantaneous power of the first load is higher than the instantaneous power of the second load; when the first load and the second load are required to work simultaneously, after the control circuit outputs a drive signal to the first load and the second load, the first battery supplies power to the first load and the second battery supplies power to the second load.

[0008] This dual-battery power supply circuit provides two independent batteries, each providing power to a first load and a second load. When the first load is a transient, high-power load requiring a large amount of power for startup, the first battery provides all of the power, without affecting the second battery's supply voltage. The power output of the second battery during startup remains unaffected, providing stable power to the second load. This improves the overall stability and reliability of the power supply circuit.

[0009] In an optional embodiment, the first battery and the second battery are both lithium batteries.

[0010] The dual-battery power supply circuit provided by the utility model has a lithium battery that is light and small in size, which can reduce the volume of the dual-battery power supply circuit.

[0011] In an optional embodiment, the dual-battery power supply circuit further includes: a first supporting capacitor, which is connected in parallel with the first battery.

[0012] In an optional embodiment, the dual-battery power supply circuit further includes: a second supporting capacitor, which is connected in parallel with the second battery.

[0013] In the dual-battery power supply circuit provided by the utility model, the first supporting capacitor and the second supporting capacitor are both used for filtering and voltage stabilization, thereby improving the stability of the battery power supply.

[0014] In a second aspect, the utility model provides a stylus pen circuit, comprising: a motor drive circuit, a coding processing circuit, and the dual-battery power supply circuit of the first aspect, wherein the power supply end of the motor drive circuit is connected to the second end of the first battery management system, the control end of the motor drive circuit is connected to the second end of the control circuit, the output end of the motor drive circuit is connected to the motor of the stylus pen, and the motor drive circuit is used to drive the motor to work based on a drive signal; the power supply end of the coding processing circuit is connected to the second end of the second battery management system, the control end of the coding processing circuit is connected to the third end of the control circuit, the output end of the coding processing circuit is connected to the tip of the stylus pen, and the coding processing circuit is used to output a coding signal to reduce interference from the tip of the stylus pen; the first battery powers the motor drive circuit, and the second battery powers the coding processing circuit.

[0015] In the stylus pen circuit provided by the present invention, a first battery supplies power to the motor drive circuit, and a second battery supplies power to the control circuit and the coding processing circuit. Since the motor drive circuit requires instantaneous high power when starting, all the power is provided by the first battery, which does not affect the supply voltage of the second battery. The power output of the second battery when the motor drive circuit starts is not affected, and the coding processing circuit, the control circuit, and other modules of the stylus pen circuit are stably supplied with power, thereby improving the overall stability and power supply reliability of the stylus pen circuit.

[0016] In an optional embodiment, the stylus pen circuit further includes: a key unit, wherein an output end of the key unit is connected to the third end of the control circuit for switching the working state of the control circuit.

[0017] In an optional embodiment, the stylus pen circuit further includes: a crystal oscillator unit, wherein an output end of the crystal oscillator unit is connected to the third end of the control circuit, and the crystal oscillator unit is used to provide a stable clock signal.

[0018] In an optional embodiment, the stylus pen circuit further includes: a light emitting unit, a control end of the light emitting unit is connected to the third end of the control circuit, and the light emitting unit is used to indicate the working state of the control circuit.

[0019] In an optional embodiment, the stylus circuit further includes an acceleration state detection unit, a control end of the acceleration state detection unit is connected to the third end of the control circuit, and the acceleration state detection unit is used to detect speed changes of the stylus.

[0020] In the third aspect, the utility model provides a stylus pen, comprising: a pen tip, a pen body, a main board, a motor and the stylus pen circuit of the second aspect, wherein the main board integrates a first battery management system, a second battery management system and a control circuit; the motor, the main board, the first battery and the second battery are sequentially arranged inside the pen body; the pen tip is arranged on the outside of the pen body near one end of the motor.

[0021] The stylus provided by the utility model has a first battery and a second battery independently arranged. The first battery supplies power to the motor drive circuit, and the second battery supplies power to circuits other than the motor drive circuit. As a result, all the electric energy for starting the motor is provided by the first battery, which does not affect the supply voltage of the second battery. The electric energy that the second battery can output when the motor starts is not affected, and the coding processing circuit, the control circuit, and other modules of the stylus circuit are stably supplied with power, thereby improving the stability and power supply reliability of the stylus. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A diagram showing a specific example of a dual-battery power supply circuit according to an embodiment of the present invention;

[0024] Figure 2 A composition diagram of another specific example of a dual-battery power supply circuit according to an embodiment of the present utility model;

[0025] Figure 3 A diagram showing a specific example of a stylus pen circuit according to an embodiment of the present invention;

[0026] Figure 4 A structural diagram of a specific circuit of a stylus pen circuit according to an embodiment of the present invention;

[0027] Figure 5 A specific structural diagram of the touch pen according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal connections between two components; they may refer to wireless connections or wired connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] The existing stylus circuit only has one battery. When the stylus motor needs to work, the motor is an instantaneous high-power load. The power required to start the motor is large, and the battery capacity is low. This will pull the battery voltage, causing the battery to be unable to power other modules of the stylus at the same time, making the entire stylus system, such as the writing and drawing system, unable to work properly, or even causing the entire system to crash.

[0033] This embodiment provides a dual battery power supply circuit, such as Figure 1 As shown, the dual-battery power supply circuit includes: a first battery 1, a first battery management system 2, a second battery 3, a second battery management system 4 and a control circuit 5, wherein the output end of the first battery 1 is connected to the first end of the first battery management system 2; the output end of the second battery 3 is connected to the first end of the second battery management system 4; the second end of the first battery management system 2 is connected to the power supply end of the first load; the second end of the second battery management system 4 is connected to the first end of the control circuit 5; the second end of the control circuit 5 is connected to the control end of the first load, and the third end of the control circuit 5 is connected to the control end of the second load.

[0034] Specifically, Figure 1 In the figure, the first battery management system 2 is used to obtain information such as the power consumption, voltage, current, power factor, etc. of the first load according to the real-time working status of the first load, and flexibly adjust the power supply status of the first battery 1 to the first load; the second battery management system 4 is used to obtain information such as the power consumption, voltage, current, power factor, etc. of the control circuit 5 and the second load according to the real-time working status of the control circuit 5 and the second load, and flexibly adjust the power supply status of the second battery 3 to the control circuit 5 and the second load.

[0035] Specifically, Figure 1 In the embodiment, when the first load and the second load need to work at the same time, after the control circuit 5 outputs the driving signal to the first load and the second load, the first battery 1 supplies power to the first load and the second battery 3 supplies power to the second load. Since the instantaneous power of the first load is higher than the instantaneous power of the second load, the electric energy, power, current, voltage, etc. required for the first load to start are all higher. Therefore, when the first load starts, all the electric energy is only provided by the first battery 1, which will not affect the supply voltage of the second battery 3, so that the second battery 3 can stably supply power to the control circuit 5 and the second load, thereby ensuring the stability of the power supply circuit.

[0036] Optionally, Figure 1 In the embodiment, the dual-battery power supply circuit can be applied to the stylus pen. The first load can be the motor and the related circuits driving the motor in the stylus pen. The second load can be other functional modules in the stylus pen whose instantaneous power is lower than that of the first load. When the motor needs to be started, the first battery 1 alone supplies power to the motor and the related circuits driving the motor, and the second battery 3 alone supplies power to other functional modules in the stylus pen. The power supplies of the two batteries do not affect each other, thereby ensuring the power supply stability of the stylus pen system.

[0037] This embodiment provides a dual-battery power supply circuit in which two independent batteries are provided to power a first load and a second load, respectively. When the first load is a transient, high-power load requiring a large amount of power for startup, the first battery provides all of the power, without affecting the second battery's supply voltage. The power output of the second battery during startup remains unaffected, providing stable power to the second load, thereby improving the overall stability and reliability of the power supply circuit.

[0038] In some optional embodiments, Figure 1 In the embodiment, the first battery 1 and the second battery 3 are both lithium batteries.

[0039] Optionally, the first battery 1 and the second battery 3 may also be lithium iron phosphate batteries, dry batteries, solar cells, etc.

[0040] In some optional embodiments, such as Figure 2 As shown, the dual-battery power supply circuit further includes: a first supporting capacitor 6 and a second supporting capacitor 7 , wherein the first supporting capacitor 6 is connected in parallel with the first battery 1 , and the second supporting capacitor 7 is connected in parallel with the second battery 3 .

[0041] Specifically, Figure 2 In the embodiment, the first supporting capacitor 6 and the second supporting capacitor 7 are both used to stabilize and filter the battery voltage to prevent the battery output from damaging the load due to transient overvoltage.

[0042] This embodiment provides a stylus circuit, such as Figure 3 As shown, it includes: a motor drive circuit 8, a coding processing circuit 9 and a dual-battery power supply circuit of the above embodiment and any optional implementation scheme thereof, the first battery 1 is used to power the motor drive circuit 8, and the second battery 3 is used to power the coding processing circuit 9.

[0043] Figure 3 In the embodiment, the power supply end of the motor drive circuit 8 is connected to the second end of the first battery management system 2, the control end of the motor drive circuit 8 is connected to the second end of the control circuit 5, and the output end of the motor drive circuit 8 is connected to the motor of the stylus.

[0044] Specifically, Figure 3 In the present invention, motor drive circuit 8 is an instantaneous high-power circuit that requires a relatively large starting current and power. Therefore, first battery 1 is used to independently power motor drive circuit 8 through first battery management system 2. When motor drive circuit 8 receives a drive signal from control circuit 5, it is powered by first battery 1 and drives the stylus's motor, causing the stylus to vibrate.

[0045] Figure 3In the embodiment, the power supply end of the coding processing circuit 9 is connected to the second end of the second battery management system 4, the control end of the coding processing circuit 9 is connected to the third end of the control circuit 5, and the output end of the coding processing circuit 9 is connected to the tip of the stylus.

[0046] Specifically, Figure 3 In the stylus, the coding processing circuit 9 is used to output a coding signal to reduce interference from the pen tip and adjust the output of the coding signal to solve the problem of the stylus's insensitive touch operation or power consumption caused by the high coding voltage. The control circuit 5 is also used to control the other functional modules of the stylus. Since the motor drive circuit 8 is powered solely by the first battery 1, the control circuit 5, the coding processing circuit 9, and other functional modules, such as the writing and drawing system, buttons, and status detection unit, are all powered solely by the second battery 3. Therefore, when the motor drive circuit 8 is operating, its instantaneous high current and high voltage will not affect the output of the second battery 3. The second battery 3 can maintain a normal and stable output state, and normally power the control circuit 5, the coding processing circuit 9, and other functional modules.

[0047] It should be noted that when a transient high-power load such as a coding boost module is added to the circuit, a battery and a corresponding battery management system can be added to separately power the transient high-power load, thereby reducing interference with other parts of the stylus circuit.

[0048] In the stylus circuit provided in this embodiment, the first battery powers the motor drive circuit, and the second battery powers the control circuit and the coding processing circuit. Since the motor drive circuit requires instantaneous high power when starting, all the power is provided by the first battery, which does not affect the supply voltage of the second battery. The power output of the second battery when the motor drive circuit starts is unaffected, providing stable power to the coding processing circuit, the control circuit, and other modules of the stylus circuit, thereby improving the overall stability and power supply reliability of the stylus circuit.

[0049] In some optional embodiments, such as Figure 3 As shown, the stylus pen circuit further includes: a key unit 10 , and an output end of the key unit 10 is connected to the third end of the control circuit 5 .

[0050] Specifically, Figure 3 In the figure, the key unit 10 is used to switch the working state of the control circuit 5. The user can switch the function of the stylus through the key unit 10. For example, the user can switch the vibration mode and vibration frequency of the motor, switch the eraser, brush and other functions by double-clicking or long pressing the touch key unit 10. The control circuit 5 switches the driving signal according to the output signal of the key unit 10, and then controls the motor driving circuit 8, the coding processing circuit 9 and other functional modules in the stylus to switch the working state, thereby realizing the switching of the stylus function.

[0051] In some optional embodiments, such as Figure 3 As shown, the stylus pen circuit further includes: a crystal oscillator unit 11 , and an output end of the crystal oscillator unit 11 is connected to the third end of the control circuit 5 .

[0052] Specifically, Figure 3 In the device, crystal oscillator unit 11 provides a stable clock signal for the stylus, enabling stable communication between the stylus and the connected device. This ensures synchronization of data transmission and operating instructions between the stylus and the device, thereby improving the accuracy and responsiveness of the stylus. The reference frequency provided by crystal oscillator unit 11 ensures that the stylus remains synchronized with the device even during high-speed movement or frequent operation, making the stylus more sensitive and reliable when operating electronic devices.

[0053] In some optional embodiments, such as Figure 3 As shown, the stylus pen circuit further includes: a light emitting unit 12 , and a control end of the light emitting unit 12 is connected to the third end of the control circuit 5 .

[0054] Specifically, Figure 3 In the embodiment, the light-emitting unit 12 can switch the display state according to the working state of the control circuit 5, thereby indicating the current working state of the stylus pen. The light-emitting unit 12 can also emit light according to the preset state when the first battery 1 or the second battery 3 is low on power, prompting the user to charge in time.

[0055] In some optional embodiments, such as Figure 3 As shown, the stylus pen circuit further includes: an acceleration state detection unit 13 , and a control end of the acceleration state detection unit 13 is connected to the third end of the control circuit 5 .

[0056] Specifically, Figure 3 In the figure, the acceleration state detection unit 13 is used to detect the speed change of the stylus. It integrates an acceleration sensor and a gyroscope. The acceleration state detection unit 13 sensor can monitor the acceleration change and rotation posture change of the stylus in real time, thereby obtaining the user's gesture information. By matching these gesture information with the pre-stored association relationship, the electronic device connected to the stylus can perform the corresponding function, thereby improving the flexibility of using the stylus to control the electronic device.

[0057] It should be noted that all functional units in the stylus in this embodiment are equipped with mature stylus control programs and control methods in the prior art. Those skilled in the art can program the control circuit, acceleration state detection unit coding processing circuit, etc. according to the mature stylus control programs in the prior art and in combination with actual needs, and adjust the stylus operating logic. That is, this embodiment only protects the structure of the stylus circuit, and does not protect the internal control logic of the stylus circuit.

[0058] Specifically, Figure 4This is a specific circuit diagram of the stylus circuit. The two ends of the first battery 1 are connected in parallel to the first supporting capacitor 6 and then connected to the first battery management system 2. The first battery 1 separately powers the motor drive circuit 8 through the first battery management system 2. The motor drive circuit 8 is connected to the MCU (i.e., the control circuit) through the MCU control line. The motor drive circuit 8 drives the motor to work under the action of the MCU's drive signal.

[0059] Optionally, Figure 4 The motor driving circuit 8 and the motor in the embodiment can also be replaced by other instantaneous high-power modules that can easily load the battery voltage.

[0060] Specifically, Figure 4 In the figure, the second battery 3 is directly connected to the second battery management system 4 to power the MCU and peripherals such as the key unit and the light-emitting unit connected to the MCU. The first battery 1 drives the instantaneous high-power module alone to work, and will not load the output voltage of the second battery 3, thereby not affecting the output state of the second battery 3, so that the second battery 3 can stably output the power supply voltage to power the MCU and peripherals, ensuring the stable operation of the entire stylus circuit.

[0061] This embodiment provides a touch pen, such as Figure 5 As shown, it includes: a pen tip 101, a pen body 102, a main board 103, a motor 104 and a stylus circuit of the above embodiments and any optional implementation scheme thereof, the main board 103 integrates a first battery management system, a second battery management system and a control circuit; the motor 104, the main board 103, the first battery 1, and the second battery 3 are sequentially arranged inside the pen body 102; the pen tip 101 is arranged on the outside of the pen body 102 near one end of the motor 104.

[0062] It should be noted that those skilled in the art can set the positions of other peripherals of the stylus as needed. The working principle of the stylus circuit integrated in the motherboard is consistent with the contents of the stylus circuit in the above embodiment and any optional implementation scheme thereof, and will not be repeated here.

[0063] In the stylus provided in this embodiment, the first battery and the second battery are independently provided. The first battery powers the motor drive circuit, and the second battery powers circuits other than the motor drive circuit. This ensures that all the power required to start the motor is provided by the first battery, without affecting the supply voltage of the second battery. The power output of the second battery during motor startup is unaffected, providing stable power to the coding processing circuit, the control circuit, and other modules of the stylus circuit, thereby improving the stability and power supply reliability of the stylus.

[0064] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A dual battery power supply circuit, characterized in that: include: A first battery, a first battery management system, a second battery, a second battery management system and a control circuit, wherein: The output end of the first battery is connected to the first end of the first battery management system; The output terminal of the second battery is connected to the first terminal of the second battery management system; The second end of the first battery management system is connected to the power supply end of the first load; The second terminal of the second battery management system is connected to the first terminal of the control circuit; The second end of the control circuit is connected to the control end of the first load, and the third end of the control circuit is connected to the control end of the second load; The instantaneous power of the first load is higher than the instantaneous power of the second load; When the first load and the second load are required to work simultaneously, after the control circuit outputs driving signals to the first load and the second load, the first battery supplies power to the first load and the second battery supplies power to the second load.

2. The dual battery power supply circuit according to claim 1, characterized in that: The first battery and the second battery are both lithium batteries.

3. The dual battery power supply circuit according to claim 2, characterized in that: Also includes: A first supporting capacitor is connected in parallel with the first battery.

4. The dual battery power supply circuit according to claim 3, characterized in that: Also includes: A second supporting capacitor is connected in parallel with the second battery.

5. A stylus pen circuit, characterized in that: include: A motor drive circuit, a coding processing circuit, and a dual-battery power supply circuit according to any one of claims 1 to 4, wherein: The power supply terminal of the motor drive circuit is connected to the second terminal of the first battery management system, the control terminal of the motor drive circuit is connected to the second terminal of the control circuit, and the output terminal of the motor drive circuit is connected to the motor of the stylus pen. The motor drive circuit is used to drive the motor based on the drive signal; The power supply terminal of the coding processing circuit is connected to the second terminal of the second battery management system, the control terminal of the coding processing circuit is connected to the third terminal of the control circuit, and the output terminal of the coding processing circuit is connected to the tip of the stylus pen. The coding processing circuit is used to output a coding signal to reduce interference from the stylus tip; The first battery supplies power to the motor drive circuit, and the second battery supplies power to the coding processing circuit.

6. The stylus pen circuit according to claim 5, wherein: Also includes: Button unit, The output end of the key unit is connected to the third end of the control circuit and is used to switch the working state of the control circuit.

7. The stylus pen circuit according to claim 5, wherein: Also includes: Crystal oscillator unit, The output end of the crystal oscillator unit is connected to the third end of the control circuit, and the crystal oscillator unit is used to provide a stable clock signal.

8. The stylus pen circuit according to claim 5, wherein: Also includes: Light-emitting unit, The control end of the light emitting unit is connected to the third end of the control circuit, and the light emitting unit is used to indicate the working state of the control circuit.

9. The stylus pen circuit according to claim 5, wherein: Also includes: Acceleration state detection unit, The control end of the acceleration state detection unit is connected to the third end of the control circuit, and the acceleration state detection unit is used to detect the speed change of the stylus pen.

10. A touch pen, characterized in that: include: A pen tip, a pen holder, a main board, a motor, and a stylus circuit according to any one of claims 5 to 9, The mainboard is integrated with a first battery management system, a second battery management system and a control circuit; The motor, mainboard, first battery and second battery are sequentially arranged inside the pen holder; The pen tip is arranged on an end of the outer side of the pen shaft close to the motor.

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