WO2019196056A1 - 耳机的控制装置和有线耳机 - Google Patents

耳机的控制装置和有线耳机 Download PDF

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Publication number
WO2019196056A1
WO2019196056A1 PCT/CN2018/082800 CN2018082800W WO2019196056A1 WO 2019196056 A1 WO2019196056 A1 WO 2019196056A1 CN 2018082800 W CN2018082800 W CN 2018082800W WO 2019196056 A1 WO2019196056 A1 WO 2019196056A1
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Prior art keywords
circuit
earphone
resistor
voltage
comparator
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PCT/CN2018/082800
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English (en)
French (fr)
Inventor
段红亮
杨旺旺
刘畅
Original Assignee
深圳市汇顶科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to PCT/CN2018/082800 priority Critical patent/WO2019196056A1/zh
Priority to CN201880000750.5A priority patent/CN108521873B/zh
Publication of WO2019196056A1 publication Critical patent/WO2019196056A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1041—Mechanical or electronic switches, or control elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/007—Protection circuits for transducers

Definitions

  • Embodiments of the present invention relate to the field of electronic technologies, and, more particularly, to a control device for a headset and a wired headset.
  • heart rate measurement has become the most common physiological state detection index.
  • the ear has abundant capillaries and has great advantages in measuring physiological signals such as heart rate, blood pressure and blood oxygen.
  • the headset requires a built-in battery and also require charging, and the cost is high and the price is expensive.
  • Traditional wired headsets generally only have the basic functions of voice transmission, music playback, and button operation.
  • the output of the power supply terminal of the mobile phone paired with the headset is limited by the power supply mode of the wired headset.
  • the lower voltage and higher internal resistance are not sufficient to provide enough power for the heart rate detection function.
  • a tank circuit can be provided in the earphone for storing the charge from the microphone end of the earphone.
  • the energy storage circuit can normally supply power to the earphone, preventing the earphone from excessively consuming a large current, causing the power supply terminal voltage to drop excessively, thereby affecting the earphone function. For example, heart rate detection function, etc.
  • the energy storage circuit is usually connected to the microphone end of the earphone, when the voltage of the energy storage circuit is higher than the voltage of the microphone end of the earphone, the electric charge in the energy storage circuit is lost to the power supply end of the terminal device, which may cause unnecessary waste. Further, it is possible to cause the earphone to suddenly lose power.
  • the present application provides a control device for a headset and a wired headset.
  • the control device can effectively prevent the electric charge in the storage circuit from supplying power to the terminal device. The end is drained to reduce the waste of charge, thereby avoiding the sudden power loss of the earphone due to the loss of charge in the energy storage circuit.
  • a headset control device including:
  • the microphone end of the earphone is connected to the energy storage circuit of the earphone through the backflow detection control circuit, and the reverse current detection control circuit is configured to compare a voltage in the energy storage circuit with the microphone end Voltage and controlling electrical or electrical disconnection between the tank circuit and the mic end based on the result of the comparison.
  • the reverse current detection control circuit when the reverse current detection control circuit determines that the voltage of the energy storage circuit is higher than the voltage of the microphone end of the earphone, the reverse current detection control circuit can control the electrical disconnection between the energy storage circuit and the microphone end to prevent energy storage.
  • the charge in the circuit is lost to the power supply terminal of the terminal device to reduce the waste of charge, thereby avoiding the sudden power failure of the earphone due to the loss of charge in the energy storage circuit.
  • the backflow detection control circuit determines that the voltage in the tank circuit is lower than the voltage of the microphone terminal, the backflow detection control circuit can control the electrical connection between the tank circuit and the microphone end, thereby enabling the tank circuit to store the earphone. The charge at the end of the microphone.
  • a wired headset comprising: the control device of the first aspect.
  • FIG. 1 is a schematic structural view of a wired earphone with a 3.5 mm audio connector according to an embodiment of the present invention.
  • FIG. 2 is a diagram showing an example of a 3.5 mm audio interface of a terminal device corresponding to a 3.5 mm audio connector according to an embodiment of the present invention.
  • FIG. 3 is a schematic block diagram of a biometric detection module in accordance with an embodiment of the present invention.
  • FIG. 4 and FIG. 5 are schematic diagrams showing the design positions of the biometric detecting module in the earplug according to the embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of an earphone incorporating a biometric detecting module according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram showing the position of a backflow detection control circuit of an earphone according to an embodiment of the present invention.
  • Figure 8 is a diagram showing the position of a supply voltage control circuit of an earphone according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram showing the position of a voltage protection circuit of an earphone according to an embodiment of the present invention.
  • Figure 10 is a schematic illustration of the position of a signal isolation circuit in accordance with an embodiment of the present invention.
  • Figure 11 is a schematic block diagram of an earphone in accordance with an embodiment of the present invention.
  • FIG. 12 is a voltage waveform diagram of the power supply terminal when the power supply terminal of the terminal device is in a sleep state according to an embodiment of the present invention.
  • FIG. 13 is a voltage waveform diagram of the power supply terminal after the power take-off circuit is operated by the terminal device that is dormant at the power supply end according to the embodiment of the present invention.
  • Figure 14 is a diagram showing an example of a circuit design of an earphone according to an embodiment of the present invention.
  • Figure 15 is a diagram showing an example of the structure of a first voltage detecting control circuit in accordance with an embodiment of the present invention.
  • Figure 16 is a block diagram showing another example of the first voltage detecting control circuit of the embodiment of the present invention.
  • Figure 17 is a diagram showing an example of another circuit design of the earphone of the embodiment of the present invention.
  • the wired earphone 100 includes a 3.5 mm audio connector 110b, a headphone cable 120, a wire control board 130, and an earphone 140.
  • the 3.5mm audio connector 110b can be divided into a microphone (MIC) communication connector 111b, a device ground (GND) potential connector 112b, a right earphone speaker connector 113b, and a left earphone speaker connector 114b.
  • MIC microphone
  • GND device ground
  • the connector 113b and the left earphone speaker connector 114b are respectively connected to the microphone (MIC) communication interface 111a, the device ground (GND) interface 112a, the right speaker interface 113a and the left speaker interface 114a shown in FIG. 2, wherein the microphone communication interface 111a, the device The ground interface 112a, the right speaker interface 113a, and the left speaker interface 114a constitute the audio interface 110a of the terminal device.
  • a digital to analog converter converts a digital signal into an analog signal (in the form of current, voltage, or charge) to communicate with the headset or to power the headset.
  • the microphone communication interface 111a is connected to the internal level 152 of the terminal device, and the internal level 152 provides a power supply voltage to the earphone through the microphone communication interface 111a.
  • the microphone communication interface 111a may also be referred to as a terminal.
  • the power supply terminal of the device is used as an example. It should be understood that the conventional wired earphone generally has only the basic functions of voice transmission, music playback, and button operation.
  • the wired headset 100 in the embodiment of the present invention may have a biometric detection module built therein, and the biometric detection module may be any module that can detect the physiological state of the human body.
  • the biometric detection module may be a biometric detection module 711, a pressure detection module, a wear detection module, a blood pressure detection module, a body temperature detection module, a blood glucose detection module, a blood lipid detection module, and the like, and other physiological signals or circuit modules.
  • the application is not limited to earbuds and is merely illustrative herein.
  • the wired headset 100 in the embodiment of the present invention may have a biometric display module for displaying the detection result of the biometric detection module.
  • the biometric detection module 200 can include an acquisition module 220 and a calculation control module 210.
  • the acquisition module 210 is configured to collect the original heart rate data (or the processed heart rate data, or the calculated heart rate result); the calculation control module 210 can be used to process and calculate the heart rate data collected by the collection module 220; the calculation control module The 210 can also be used to communicate with the mobile phone and the acquisition module 220.
  • the calculation control module 210 can also be used to control the working mode of the entire module or circuit in the biometric detection module 200 or the biometric detection module 200.
  • the acquisition module 220 can include a heart rate sensor 221, a light emitting diode (LED) 224, an acceleration sensor 222, and an optical design module 225, which can include a photodiode (PD) 223.
  • the heart rate sensor 221 controls the light-emitting diode 224 to emit light, and the emitted light passes through the skin tissue and is transmitted to the photodiode 223.
  • the heart rate sensor 221 processes the optical signal received by the photodiode 223, and quantizes the optical signal into an electrical signal.
  • the analog to digital conversion circuit converts to a digital signal and finally sends it to a standard digital communication interface. For example, I2C interface, SPI interface.
  • the calculation control module 210 may include a power supply control module 211, a Micro Control Unit (MCU), and a Digital Signal Processing (DSP) 212.
  • the calculation control module 210 can be used to control the power supply of the acquisition module 220, the operation mode, calculate and indicate the measured heart rate result, and the like.
  • the earplug 140 shown in FIG. 1 in the embodiment of the present invention may include: an earplug machine member 141 and an acquisition module 220 as shown in FIG.
  • the earphone component 141 may include: a rear shell trim, a rear shell, a front shell, and a silicone sleeve.
  • the earplug 140 may further include the speaker module 142 and a plurality of wires 123c connected to the speaker module 142 and the acquisition module 220, respectively.
  • the biometric detection module 200 (especially the acquisition module 220) in the embodiment of the present invention may be disposed at any position on the wired earphone that can be close to the ear.
  • FIG. 6 is a schematic structural diagram of an earphone incorporating a biometric detecting module 200 (particularly, the collecting module 220) according to an embodiment of the present invention.
  • the acquisition module 220 is disposed on the left earplug 340 b
  • the calculation control module 210 illustrated in FIG. 3 may be disposed in the wire control panel 330 .
  • the beam splitter 322 is for dividing the third wire harness 321 into a first wire harness 323-B and a second wire harness 323-A through which the first wire harness 323-B is connected to the third wire harness 323-C. It should be understood that the connection relationship between the various functional modules shown in FIG. 6 is only an exemplary description, and is not specifically limited in the embodiment of the present invention.
  • the acquisition module 220 is disposed on the left earbud 340b.
  • the acquisition module 220 can also be disposed on the right earbud 340a, or both on the right earbud 340a and the left earbud 340b, and the like.
  • the calculation control module 210 can be disposed on the wire control board 330 .
  • the calculation control module 210 can be disposed on the right earbud 340a and/or the left earplug 340b, and the calculation control module 210 can also be integrated into the earphone alone or the like.
  • the embodiment of the invention is not specifically limited.
  • the earphone in the embodiment of the present invention does not require a battery, there is no need to charge, and it is not necessary to carry a charging cable or a charger. Moreover, it is easy to use and can be used by inserting a target device (for example, a mobile phone), thereby reducing the production cost of the earphone. Further, the earphone in the embodiment of the present invention can support heart rate measurement on the earphone and indicate the heart rate interval. However, when the earphone integrated with the biometric detection module is inserted into the terminal device (for example, a mobile phone), only the microphone (MIC) line (ie, the microphone end of the earphone) has a current, that is, the mobile phone system receives the power supply voltage only through the microphone end of the earphone.
  • the terminal device for example, a mobile phone
  • the microphone terminal current of the earphone When the microphone terminal current of the earphone is too large or too small, it will affect the normal operation of the earphone.
  • the audio signal generated by the microphone is also transmitted to the mobile phone through the MIC line on the mobile phone. Therefore, for a device that transmits signals through a power line (such as a mobile phone output MIC line), the signal to be transmitted on the power line cannot be attenuated, and the power fluctuation generated by the system operation cannot interfere with the signal on the power line.
  • the built-in biometric detection module in the earphone is likely to cause interference between the two signals, thereby reducing the user experience.
  • a storage circuit for storing the charge from the microphone end of the earphone may be built in the earphone.
  • the energy storage circuit can normally supply power to the earphone, preventing the earphone from excessively consuming a large current, causing the power supply terminal voltage to drop too much, thereby affecting the normal voice of the earphone. Transfer function.
  • a backflow detection control circuit can be configured for the earphone.
  • the control device 400 for the earphone may include a backflow detection control circuit 420 through which the microphone end 410 of the earphone is connected to the energy storage circuit 430 of the earphone, the backflow detection control circuit 420. Comparing the voltage in the energy storage circuit 430 with the voltage of the microphone terminal 410 of the earphone, and controlling the electrical connection or the electrical connection between the energy storage circuit 430 and the microphone terminal 410 according to the comparison result of the backflow detection control circuit 420. disconnect.
  • the earphone can be further configured in the embodiment of the present invention, in order to ensure that the power supply voltage of the earphone is insufficient to drive the various modules or circuits in the earphone to work normally even in the presence of the energy storage circuit.
  • a supply voltage control circuit that can control a supply voltage or power consumption of at least one module or circuit in the earphone.
  • the supply voltage control circuit can control a supply voltage of the signal processing circuit in the earphone.
  • the control device 400 for the earphone may include a power supply voltage control circuit 440 through which the microphone terminal 410 of the earphone is connected to the input end of the energy storage circuit 430 of the earphone, the energy storage.
  • the output of the circuit 430 is coupled to the signal processing circuit 450 by a supply voltage control circuit 440 for obtaining the voltage condition of the microphone terminal 410 of the earphone and/or the energy storage condition of the energy storage circuit 430 of the earphone. And controlling the supply voltage of the signal processing circuit 450 of the earphone according to the voltage condition of the microphone terminal 410 and/or the energy storage condition of the energy storage circuit 430 of the earphone.
  • the supply voltage control circuit 440 is configured to acquire the voltage of the microphone terminal of the earphone and/or the voltage state of the energy storage circuit, thereby controlling the power supply voltage or operation mode of each module or circuit in the earphone.
  • a voltage protection circuit can be built in the earphone for the problem that the current of the microphone terminal of the earphone is too large or the power supply capability of the earphone plug of the terminal device is too large.
  • the control device 400 of the earphone may include a voltage protection circuit 520.
  • the voltage protection circuit 520 When the earphone is inserted into the terminal device, the voltage protection circuit 520 is connected to the power supply end of the terminal device through the microphone end 510 of the earphone.
  • the protection circuit 520 is configured to receive the voltage output by the power supply terminal and output a power supply voltage of the earphone, wherein the voltage output by the power supply terminal is greater than or equal to the power supply voltage.
  • the voltage protection circuit 520 can control the voltage outputted by the power supply terminal to be greater than or equal to the power supply voltage, thereby preventing the circuit of the back end from being damaged when the voltage outputted by the power supply terminal is too large, thereby affecting the normal operation of the earphone.
  • the voltage protection circuit 520 can be used to output the threshold voltage.
  • the voltage protection circuit 520 can be used for output.
  • the threshold voltage is 2.8 volts.
  • a signal isolation circuit may be built in the earphone so that the power supply generated during the operation of the earphone does not fluctuate. It will interfere with the signal transmitted on the power line.
  • the control device 400 for the earphone may include a signal isolation circuit 630 through which the microphone end 610 of the earphone is connected to one end of the signal isolation circuit 630, wherein the sound pickup circuit 620 is used for The received sound signal is converted into an electrical signal.
  • the signal isolation circuit 630 is for isolating interference between the electrical signal and a circuit (generated power supply fluctuation) connected to the other end of the signal isolation circuit 630.
  • FIG. 11 is a schematic block diagram of a structure of an earphone according to an embodiment of the present invention.
  • the solid line in FIG. 11 may indicate an electrical connection, and the broken line may indicate a communication connection.
  • the connection relationship of the earphone including various circuits or modules may be as follows: the microphone end of the earphone is sequentially electrically connected to the first voltage through the voltage control circuit 701, the reverse current detection control circuit 702, the signal isolation circuit 703, and the energy storage circuit 704.
  • the detection control circuit 705 is electrically connected to the signal processing circuit 710, the sound pickup circuit 709, and the biometric detection module 711 by the first voltage detection control circuit 705, respectively.
  • the first voltage detection control circuit 705 is connected to the signal processing circuit 710 by a solid line. It can be understood that the first voltage detection control circuit 705 is electrically connected. Connected to the signal processing circuit 710. The first voltage detection control circuit 705 is bidirectionally connected to the signal processing circuit 710 by a broken line. It can be understood that the first voltage detection control circuit 705 and the signal processing circuit 710 can perform bidirectional communication. In actual operation, the signal processing circuit 710 can control the conduction or disconnection of the electrical connection between the first voltage detection control circuit 705 and the signal processing circuit 710 by transmitting a control signal to the first voltage detection control circuit 705. Broken. Similarly, as shown in FIG.
  • the power take-off circuit 707 can be communicatively coupled to the microphone end of the earphone and the signal processing circuit 710, and the sound pickup circuit 709 can be communicably connected to the microphone end of the earphone, the biometric detection module 711 and the creature.
  • the feature display module 712 can be communicatively coupled to the signal processing circuit 710, respectively, and the biometric detection module 711 can also be communicatively coupled to the microphone end of the headset via the communication circuit 706.
  • each module or circuit in the earphone shown in FIG. 11 is only an example.
  • the earphone may include a partial circuit or module as shown in FIG. 11, for example, does not include the backflow detection control circuit 702. Or the first voltage detection control circuit 705 or the like.
  • the microphone end of the earphone can be communicably connected to the signal processing circuit 710 through the voltage protection circuit 701, that is, the operation mode (for example, on or off) of the voltage protection circuit 701 is controlled by the signal processing circuit 710.
  • the power take-off circuit 707 is introduced in this embodiment. Therefore, when the output voltage of the power supply terminal of the terminal device is too low, the power take-off circuit 707 in this embodiment can generate and send a third signal to the terminal device inserted by the earphone, and the third signal is used to stimulate the power supply end of the terminal device. Large output voltage.
  • the power take-off circuit 707 can be used to transmit a signal to the terminal device (such as pulling the voltage of the microphone terminal of the mobile phone), which is used to trigger the power terminal of the terminal device to output a high voltage. Taking the terminal device as the mobile phone as an example, for example, when the voltage of the microphone end of the mobile phone shown in FIG.
  • the power take-off circuit 707 can pull down the voltage of the microphone end of the mobile phone for a period of time (T ms as shown in FIG. 13). ), used to trigger the mobile phone to increase the output capability of the microphone end of the mobile phone again.
  • T ms a period of time
  • the sound pickup circuit 709 shown in FIG. 11 can be used to receive an external sound signal and then converted into an electrical signal for transmission to the terminal device.
  • the power to the sound pickup circuit 709 can be controlled by the signal processing circuit 710 or other circuitry or modules.
  • the case where the output voltage of the power supply terminal of the terminal device is too low includes, but is not limited to, the following situation: the power supply terminal of the terminal device (such as the voltage of the microphone terminal output by the 3.5 mm port of the mobile phone) is unstable. When the terminal device does not use the microphone, that is, the microphone end of the terminal device sleeps (expressed as the output voltage decreases and the internal resistance increases). The voltage is too low when the earphone button is pressed.
  • the power supply mode of the 3.5 mm interface of the mobile phone may include at least one of a non-power supply mode, a strong power supply mode, and a weak power supply mode.
  • the sound pickup circuit 709 can work normally.
  • the sound pickup circuit 709 may not work normally.
  • the sound pickup circuit 709 in the embodiment of the present invention may be a microphone circuit, or may be another type of module for a call, which is not specifically limited in the embodiment of the present invention.
  • the internal level of the mobile phone interface (152 shown in FIG.
  • the mobile phone interface when the mobile phone interface is in the weak power supply mode, the mobile phone interface is The internal level can be a supply voltage lower than 1.8v; it should be understood that there are some differences between the power supply modes of different mobile phones.
  • the above figures are merely illustrative.
  • the internal level of the handset interface when the handset interface is in a weak power mode, the internal level of the handset interface may also be a supply voltage lower than 1.7V. In actual work, when the corresponding mobile phone 3.5mm interface is in the strong power supply mode, it can provide sufficient power supply voltage for the earphone.
  • the headset's supply voltage is the sleep voltage (eg, from 2.7V operating voltage to 1.4v sleep voltage).
  • the case where the mobile phone interface is in the strong power supply mode may include: the wired headset is inserted into the mobile phone, and the microphone related application is opened (such as a call); or, when no microphone application is opened, the sound pickup circuit 709 is idle. State; for example, a period of time after the wired headset is inserted; for example, for a period of time after the button is pressed; or for a period of time after the microphone-related application is stopped.
  • the mobile phone interface is in a weak power supply mode.
  • a second voltage detection control circuit 708 is introduced in the embodiment, and the second voltage detection control circuit 708 is configured to detect the voltage of the power supply end of the terminal device in time (such as the voltage of the microphone end of the 3.5 mm port output of the mobile phone). ), that is, the microphone terminal voltage of the earphone, when detecting that the microphone terminal voltage of the earphone is too low, the earphone can enter the corresponding working mode through the signal processing circuit 710 and perform corresponding processing, such as entering a low power mode, and performing related The action triggers the terminal device to output a higher voltage (eg, triggers the power take-off circuit 707 to operate).
  • the second voltage detection control circuit 708 measures the voltage condition of the microphone terminal of the earphone, and outputs a signal for characterizing the state of the microphone terminal supply voltage of the mobile phone to the signal processing circuit 710, so that the signal processing circuit makes the earphone according to the signal. Enter the corresponding working mode and handle it accordingly.
  • the second voltage detection control circuit 708 can generate and send a fourth signal to the signal processing circuit 710 for indicating the voltage condition of the microphone terminal of the earphone, and the signal processing circuit 710 receives After the fourth signal, the power take-off circuit 709 can be controlled based on the fourth signal.
  • the power supply model of the power supply end of the mobile phone in this embodiment may be a voltage source + a resistor, that is, the power supply end of the mobile phone can provide power and receive signals. Therefore, the energy storage circuit 704 in the embodiment of the present invention can store the weak current outputted by the power supply end of the mobile phone, and start the subsequent circuit operation when the charge storage is sufficient.
  • a reverse current detection control circuit 702 is introduced in the embodiment of the present invention, which can be used to control the flow direction of the current. Specifically, when the output voltage of the power supply end of the mobile phone is high, In order to provide power to the system, when the output voltage of the power supply terminal of the mobile phone is low, the charge of the energy storage circuit 704 is prevented from being lost.
  • the backflow detection control circuit 702 in this embodiment can be used to limit the one-way flow of current, that is, only allow current to flow from the power supply end of the mobile phone to the rear circuit, and prevent current from flowing from the rear circuit to the power supply end of the mobile phone.
  • a first voltage detection control circuit 705 is introduced in the embodiment of the present invention, which can be used to detect the voltage of the energy storage circuit 704. Specifically, when the first voltage detection control circuit 705 detects the energy storage circuit 704 When the voltage reaches the normal operating voltage of the system, the voltage of the microphone terminal and the charge stored in the tank circuit 704 supply power to the various modules or circuits in the headset. When the first voltage detection control circuit 705 detects that the voltage on the energy storage circuit 704 is too low, an outgoing voltage signal is sent to some modules or circuits in the earphone or the earphone to remind the system that the voltage is insufficient for the system to perform corresponding processing. (such as entering low power mode), or controlling the supply voltage of some modules or circuits in the headset.
  • the first voltage detection control circuit 705 can be used to detect the charge voltage of the tank circuit 704, and can provide the back circuit of the tank circuit 704 when the storage voltage of the tank circuit 704 is detected to reach a certain threshold. Electrical energy, further, may also output a signal to signal processing circuit 710 which characterizes how much charge is stored by tank circuit 704.
  • the signal isolation circuit 703 in the embodiment of the present invention can make the two signals generate an isolation effect, that is, can prevent the signal output from the isolated sound pickup circuit 709 (the signal is converted by the sound and transmitted to the mobile phone) to be attenuated, and can prevent the The power supply fluctuation caused by the operation of the rear circuit of the signal isolation circuit 703 affects the output signal of the sound pickup circuit 709.
  • the communication circuit 706 in this embodiment is responsible for the communication function between the mobile phone and the earphone.
  • the communication circuit 706 collects the data (heart rate value, system status, etc.) of the signal processing circuit 710 and the data (heart rate raw data, etc.) of the biometric detection module 711, and transmits the data to the mobile terminal through the MIC power supply end of the mobile phone.
  • the data sent by the mobile terminal (transmitted to the communication circuit 706 through the right channel line of the mobile phone) is correspondingly sent to the signal processing circuit 710 and the biometric detection module 711.
  • the communication circuit 706 may further include a button signal to send the button signal to the mobile terminal.
  • the signal processing circuit 710 can be the control center of the entire earphone. Specifically, the signal processing circuit 710 can be used to read the original heart rate data of the biometric detection module 711 and used to calculate the heart rate value. The signal processing circuit 710 can also be used to control the biometric display module 712 to display the value of the biometric or the interval in which the biometric is located. The signal processing circuit 710 can also be used to control the power supply of the first voltage detection control circuit 705. The signal processing circuit 710 can also be used for data exchange with the communication circuit 706. The signal processing circuit 710 can also be configured to receive the output signal of the second voltage detection control circuit 708 to determine the voltage condition of the microphone terminal of the earphone.
  • the signal processing circuit 710 can also be used to control the power take-off circuit 707 to work, triggering the microphone terminal of the mobile phone to output a high voltage.
  • the biometric detection module 711 can be placed close to the user's skin to obtain the user's original heart rate data, and the biometric display module 712 displays the current user's displayed biometric value or the interval in which the biometric is located.
  • the workflow of the earphone may include: when the earphone is inserted into the 3.5mm earphone hole of the mobile phone end, the power supply terminal outputs voltage, and the voltage control circuit 701 is used to limit the output voltage of the mobile phone and prevent the mobile phone from being blocked. The output voltage is too high, damaging the back-end circuit. Since the entire earphone is inserted for the first time, there is no charge storage in the tank circuit 704, and the current flows through the voltage protection circuit 701, flows through the backflow detection control circuit 702, and the signal isolation circuit 703 flows into the tank circuit 704 for storage.
  • the tank circuit 704 supplies power to the module or circuit at the back end of the tank circuit 704, such as the signal processing circuit 710, and the sound.
  • the pickup circuit 709 and the biometric detection module 711 and the like After the module or circuit at the back end of the tank circuit 704 is powered, it starts normal operation. Further, after the signal processing circuit 710 obtains the power supply, the biometrics detection module 711 is controlled and the corresponding heart rate raw data is acquired, and the heart rate signal is calculated and displayed by the biometric display module 712.
  • the communication circuit 706 When a button is pressed, the communication circuit 706 generates a button signal to lower the power supply voltage of the microphone end of the mobile phone.
  • the second voltage detection control circuit 708 transmits a low voltage signal on the power supply voltage of the microphone terminal of the mobile phone to the signal processing circuit 710, and the signal processing circuit 710 performs corresponding processing to save power consumption, such as stopping biometric detection and display.
  • the power supply to the sound pickup circuit 709 is turned off.
  • the reverse current detection control circuit 702 disconnects the path to prevent the charge of the energy storage circuit 704 from flowing back to the mobile phone. Mike end.
  • the sound pickup circuit 709 converts the sound signal into an electrical signal, which is transmitted to the output end of the voltage protection circuit 701 for transmission to the microphone end of the mobile phone. Due to the presence of the backflow detection control circuit 702 and the signal isolation circuit 703, the output signal of the sound pickup circuit 709 is not attenuated. At the same time, the power fluctuation generated when the earphone works is also not transmitted to the microphone end of the mobile phone due to the presence of the signal isolation circuit 703. It should be noted that for some mobile phones, when the mobile phone system does not use a microphone, the microphone end may sleep, which means that the output voltage becomes lower, the internal resistance increases, and the power supply capability becomes weak.
  • the reverse current detection control circuit 702 can be used to prevent the charge of the energy storage circuit 704 from flowing to the microphone end of the mobile phone.
  • the second voltage detection control circuit 708 detects the signal and sends a signal to the signal processing circuit 710.
  • the signal processing circuit 710 detects that the mobile phone microphone is powered to sleep, and then sends a power take signal to the power take-off circuit 707 to take power.
  • the circuit 707 triggers the mobile phone to cause the voltage output from the power supply terminal of the mobile phone to be a high voltage.
  • the signal processing circuit 710 can measure the voltage condition of the microphone terminal of the earphone and/or the charge state of the energy storage circuit measured by the first voltage detection control circuit 705 according to the second voltage detection control circuit 708, so that the earphone enters the corresponding working mode. And the corresponding processing, and then the power is distributed reasonably for each module or circuit in the earphone.
  • the reverse current detection control circuit 702 can effectively prevent the charge in the energy storage circuit from being lost to the power supply end of the mobile phone, thereby avoiding waste of the charge in the energy storage circuit.
  • the signal isolation circuit 703 can effectively reduce the interference between the sound pickup circuit 709 and the back end circuit.
  • the signal processing circuit 710 shown in FIG. 11 may control the signal according to the detection result of the module or circuit (for example, the second voltage detection control circuit 708 and/or the first voltage detection control circuit 705) in the earphone.
  • the processing circuit 710 and the supply voltages of other circuits or modules in the headset eg, the power take-off circuit 707, the biometric detection module 711, and the biometric display module 712).
  • the signal processing circuit 710 can be a Micro Control Unit (MCU)/Digital Signal Processing (DSP) for controlling the power supply, working mode and data of each module or circuit in the earphone. More specifically, It is used to control the working mode (ie, power consumption) of each circuit or module in the wired headset according to actual needs.
  • MCU Micro Control Unit
  • DSP Digital Signal Processing
  • the voltage protection circuit 701 of the embodiment of the present invention is for controlling the output voltage of the microphone end of the earphone and the power supply end of the terminal device, that is, the input voltage of the earphone.
  • the calculation control module 210 shown in FIG. 3 can be used to control the power supply, operating mode, calculations, and indicate the measured heart rate results of the acquisition module 220 as an exemplary description.
  • the embodiment of the invention is not limited thereto.
  • the calculation control module 210 can also be integrated with the signal processing circuit 710. That is, the acquisition module 220 can be separately designed. After the collection module 220 collects data, the collected data can be collected.
  • the signal processing circuit 710 is sent to the signal processing circuit 710, and the signal processing circuit 710 controls the power supply, operation mode of the acquisition module 220, calculates and indicates the measured heart rate result.
  • the various circuits or modules shown in FIG. 11 can be produced separately as the control device or circuit of the earphone, or can be partially integrated into the control device of the earphone, or can be integrated on one workpiece as the overall control device for the earphone.
  • the embodiment of the present invention is not specifically limited.
  • the voltage protection circuit 701 can be produced as part of a wired headset or integrated on the signal processing circuit 710 for production, i.e., as part of the signal processing circuit 710. 6, the respective circuits or modules shown in FIG.
  • each module or circuit involved in the embodiments of the present invention may be built in any wired headset, and the wired headset is used in conjunction with the smart terminal. Especially the intelligent terminal with 3.5mm audio output interface.
  • the embodiment of the present invention is exemplarily illustrated in the scenario in which the control device is built in the wired earphone, and the wired earphone and the mobile phone are used together.
  • the embodiment of the present invention is not limited thereto.
  • FIG. 14 is a diagram showing an example of a circuit design of an earphone according to an embodiment of the present invention.
  • FIG. 15 is a diagram showing an example of the first voltage detection control circuit 705 of FIG.
  • FIG. 16 is another exemplary diagram of the first voltage detection control circuit 705 of FIG.
  • Figure 17 is a diagram showing an example of another circuit design of the earphone of the embodiment of the present invention.
  • the above various circuits and modules are exemplarily described below in conjunction with a specific circuit design.
  • the specific circuit structure of the backflow detection control circuit 702 shown in FIG. 11 is as follows:
  • the backflow detection control circuit 702 can include a resistor 813, a resistor 814, a resistor 819, a resistor 815, a switch 817, a diode 818, a comparator 820, and a NOT gate 816.
  • the voltage of the reverse terminal of the comparator 820 is higher than the voltage of the non-inverting terminal, and the comparator 820 The output is low, and after the NOT gate 816, the control switch 817 is closed.
  • diode 818 provides a path for current flow.
  • the comparator 820 When current flows from the back end to the microphone end of the handset, the voltage at the non-inverting terminal of the comparator 820 is higher than the inverting terminal, the comparator 820 outputs a high level, and the non-gate 816 controls the switch 817 to open. At this moment, the diode 818 is in an inverted state, which prevents loss of charge in the energy storage module.
  • the button 802 when the button 802 is pressed, the voltage on the microphone terminal of the earphone becomes low, and the electric charge flows from the storage capacitor 822 to the ground through the resistor 823, the switch 817, the resistor 814, the LDO 804, the resistor 801, and the button 802.
  • the backflow detection control circuit 702 can include: a MOS transistor 917, a comparator 920, and a resistor 919; the microphone terminal is connected to the energy storage circuit 704 through the MOS transistor 917; The negative input terminal of the 920 is connected to the microphone end of the earphone. The positive input end of the comparator 920 is connected to the energy storage circuit 704. The output end of the comparator 920 is connected to the gate of the MOS transistor 917 through the resistor 919. .
  • the reverse current detection control circuit 702 may further include: a MOS transistor 916 and a resistor 918; The drain of the MOS transistor 917 is connected to the drain of the MOS transistor 916; the comparator 920 is connected to the gate of the MOS transistor 916 through the resistor 918. Further, in order to improve the performance of the flow detection control circuit 702, the reverse current detection control circuit 702 may further include: a third resistor (not shown); the MOS transistor 917 is connected to the MOS transistor 916 through the third resistor. .
  • the comparator 920 In actual operation, when the voltage of the microphone terminal of the earphone is higher than the voltage of the capacitor 923, the output of the comparator 920 is low, the MOS transistor 916 and the MOS transistor 917 are turned on, and the current flows from the microphone end of the earphone to the capacitor 923 and the capacitor 924. . When the output voltage of the microphone terminal of the earphone is lower than the voltage of the capacitor 923, the comparator 920 outputs a high level. The MOS transistor 917 and the MOS transistor 916 are turned off to prevent charge from being lost from the capacitor 923 and the capacitor 924 to the microphone end of the earphone.
  • a resistor may be connected in series between the MOS transistor 917 and the MOS transistor 916 to allow current flowing through the MOS transistor 917 and the MOS transistor 916 to also Flow through the resistor.
  • the specific circuit structure of the signal isolation circuit 703 shown in FIG. 11 is as follows:
  • the signal isolation circuit 703 may include a resistor 814, a resistor 823, a capacitor 821, and a capacitor 822; the sound pickup circuit 709 is connected to one end of the resistor 814, and the other end of the resistor 814 Connected to ground through the capacitor 821, the other end of the resistor 814 is also connected to one end of the capacitor 822 through the resistor 823, and the other end of the capacitor 822 is grounded.
  • the resistor 814 and the capacitor 821 isolate the sound signal output by the microphone (MIC) 806, preventing the sound signal outputted by the MIC806 from being excessively attenuated and disturbing the operation of the subsequent stage circuit; the resistor 823, the capacitor 821 and the capacitor 822 are used to filter the system operation. Power supply noise is generated to interfere with the pre-stage circuit.
  • the capacitor 821 and/or the capacitor 822 may constitute an energy storage circuit 704 of the earphone for storing a weak current to the microphone end of the earphone and supplying power to other circuits or modules.
  • the signal isolation circuit 703 may include a low dropout linear regulator (LDO) 921, a resistor 922, a capacitor 923, and a capacitor 924; the mic end is connected to the voltage control circuit 701 to An output end of the backflow detection control circuit 702 is connected to an end of the LDO 921.
  • the other end of the LDO 921 is connected to the ground through the capacitor 923.
  • the other end of the LDO 921 also passes through the resistor 922. Connected to one end of the capacitor 924, the other end of the capacitor 924 is grounded.
  • the LDO 921 can be used to prevent signal attenuation of the MIC 909 output.
  • the capacitor 923 and/or the capacitor 924 can form the energy storage circuit 704 of the earphone.
  • the specific circuit structure of the sound pickup circuit 709 shown in FIG. 11 is as follows:
  • the sound pickup circuit 709 may include a capacitor 805, a microphone 806, a capacitor 807, a resistor 808, a switch 809, and a non-circuit 810; the microphone end of the earphone is connected to one end of the capacitor 805.
  • the other end of the capacitor 805 is connected to one end of the capacitor 807 through the microphone 806.
  • One end of the capacitor 807 is connected to one end of the switch 809 through the resistor 808, and the other end of the switch 809 is connected to the microphone end of the earphone.
  • the other end of the 807 is grounded; the signal processing circuit 710 of the earphone is used to control the on or off of the switch 809.
  • the sound pickup circuit 709 can be composed of a capacitor 805, a microphone 806, a capacitor 807, a resistor 808, a switch 809, and a non-circuit 810.
  • the signal processing circuit 710 can be an MCU 933.
  • the power supply circuit 709 is powered by the MCU 933 through the control switch 809.
  • the microphone 806 converts the sound into an electrical signal that is transmitted through the capacitor 805 to the power supply terminal of the handset microphone.
  • the specific circuit structure of the second voltage detection control circuit 708 shown in FIG. 11 is as follows:
  • the second voltage detection control circuit may include: a resistor 811 and a resistor 812.
  • the signal processing circuit 710 is an example of the MCU 833.
  • the microphone end of the earphone is connected to the microphone 811 through the resistor 811.
  • One end of the resistor 812, the microphone end of the earphone is connected to the signal processing circuit 710 through the resistor 811, and the other end of the resistor 812 is grounded.
  • the voltage division value can be obtained by dividing the resistor 811 and the resistor 812, and the voltage division value is input to the MCU 833, and the analog-to-digital converter (Minimum-to-Digital Converter) in the MCU 833 can be used.
  • ADC analog-to-digital converter
  • other module detection in this MCU 833 can provide signal processing.
  • the signal processing circuit 710 is an example of an MCU 833.
  • the output of the first voltage detection control circuit 824 is connected to a first input end of the OR circuit 825.
  • the first voltage detection control is performed.
  • Circuitry 824 is for generating and transmitting first information to the OR circuit 825.
  • the microphone end of the earphone is connected to one end of the MCU 833 through the second voltage detecting control circuit (not shown), and the other end of the second voltage detecting control circuit is connected to the second input end of the OR circuit 825.
  • the MCU 833 is used by the MCU 833. A second signal is generated and transmitted to the OR circuit 825.
  • the characteristics of the OR gate have a high output or high. Therefore, when the first voltage detection control circuit 824 detects that the voltage of the tank circuit 703 reaches the threshold voltage, the first voltage detection control circuit 824 outputs a high level, and the OR circuit 825 also outputs a high level. In addition, when the MCU 833 is powered, the MCU 833 outputs a high level to the OR circuit 825, and the OR circuit 825 also outputs a high level, so that when the first voltage detection control circuit 824 outputs a low level, The output of the circuit 825 is guaranteed to be high, preventing accidents such as the MCU 833 and frequent power failures.
  • the first voltage detection control circuit 824 can also send the energy storage status information of the energy storage circuit to the MCU 833.
  • the storage circuit voltage can be represented. Insufficient, and the MCU 833 can perform corresponding operations to reduce overall power consumption.
  • the first voltage detection control circuit 824 shown in FIG. 14 may be configured with a hysteresis voltage detecting function.
  • the output is high when the voltage on the tank circuit 704 reaches 2V until the voltage of the tank circuit 704 drops to 1.85V and its output is low.
  • the OR circuit 825 also outputs a high level, thereby closing the switch 826 to supply power to the MCU 833, and the output pin of the MCU 833 can be connected to
  • the other input of the OR circuit 825 that is, the MCU 833 is powered up and outputs a high level to the input of the circuit 825, which can also be used to maintain normal power supply to the MCU 833, whereby the first voltage detection control circuit 824 and the MCU are provided. Any output of 833 is high to ensure that the MCU 833 has power.
  • the MCU 833 can control the power supply of the biometric detection module 830 by controlling the turning on or off of the switch 828, and the MCU 833 can also be used to calculate the current biometric value of the user (such as the heart rate value) and pass the LED 832. display.
  • the MCU 833 calculates the value of the biometric, if the system power consumption is too large, the voltage on the storage capacitor 822 is lower than 1.85V, the first voltage detection control circuit 824 outputs a low level, and the MCU 833 obtains the signal. Corresponding measures (such as stopping heart rate acquisition and calculation, MCU 833 enters sleep mode) will reduce system power consumption.
  • the specific circuit structure of the first voltage detection control circuit 705 shown in FIG. 11 is as follows:
  • the first voltage detection control circuit 824 may include: a resistor 401, a resistor 402, a resistor 403, a comparator 404, a comparator 405, and a flip-flop 406; one end of the resistor 401 and the memory The other end of the resistor 401 is connected to one end of the resistor 403, the other end of the resistor 403 is grounded, and the other end of the resistor 401 is connected to the negative input terminal of the comparator 404.
  • One end of the 402 is connected to the positive input of the comparator 405, the positive input of the comparator 404 and the negative input of the comparator 405 receive a reference voltage, the output of the comparator 404 and the R input of the flip flop 406 Connected to the terminal, the output of the comparator 405 is coupled to the S input of the flip flop 406.
  • the resistor 401, the resistor 402 and the resistor 403 are connected in series, the resistor 401 is connected to the measured voltage, the resistor 403 is connected to the ground, and the voltage to be measured (Vi) is divided; the non-inverting input terminal of the comparator 404 is connected to the reference voltage, and is reversed.
  • the input terminates the intersection of resistor 401 and resistor 402, and the output of comparator 404 is coupled to the R terminal of flip-flop 406.
  • the non-inverting input of the comparator 405 is connected to the intersection of the resistor 401 and the resistor 402, the inverting input of the comparator 405 is connected to the reference voltage, the output is connected to the S terminal of the flip-flop 406, and the Q of the flip-flop 406 is used as the voltage detection. signal of.
  • the output of the comparator 404 is a low level
  • the comparator When the output of 405 is low, the Q terminal of flip-flop 406 outputs a low level.
  • the Vi voltage rises again, so that the voltage of the inverting input terminal of the comparator 404 is higher than the reference voltage, the non-inverting input terminal of the comparator 405 is higher than the reference voltage, the comparator 404 outputs a low level, and the output of the comparator 405 is high.
  • the Q terminal of the flip flop 406 outputs a high level. If the measured voltage is reduced to the opposite input voltage of comparator 404 at this time, the voltage at the non-inverting input of comparator 405 is less than the reference voltage.
  • the comparator 404 outputs a low level, and the comparator 405 outputs a low level, but the previous state of the Q terminal of the flip-flop 406 is a high level, so the current state of the Q terminal of the flip-flop 406 is also a high level. .
  • the measured voltage continues to decrease, as low as the voltage at the inverting input of the comparator 404 is less than the reference voltage, the voltage at the non-inverting input of the comparator 405 is less than the reference voltage, the output of the comparator 404 is high, and the output of the comparator 405 is low. level.
  • the Q terminal output of the current flip flop 406 is at a low level. Thereby, the detection of the hysteresis voltage can be achieved. In this embodiment, the detection range of the hysteresis voltage can also be adjusted by adjusting the ratio of the resistor 401, the resistor 402, and the resistor 403.
  • the first voltage detection control circuit 824 may include a resistor 407 , a resistor 409 , a resistor 408 , and a comparator 411 .
  • the tank circuit 704 is connected to the resistor 409 through the resistor 407 .
  • the other end of the resistor 409 is coupled to the output of the comparator 411, the negative input of the comparator 411 receives a reference voltage, and the positive input of the comparator 411 is coupled to ground through the resistor 408.
  • the resistor 407 is connected to the measured voltage and the non-inverting input of the comparator 411.
  • the resistor 409 is connected to the output of the comparator 411 and the non-inverting input.
  • the resistor 408 is connected to the non-inverting input of the comparator 411 and the ground.
  • the inverting input is connected to the reference voltage.
  • the comparator 411 outputs a low level.
  • the non-inverting input voltage of the comparator 411 is the total resistance of the resistor 408 in parallel with the resistor 409 and the partial pressure of the resistor 407.
  • the output of the comparator 411 is at a high level, which is equivalent to changing the calculation model of the voltage at the non-inverting input of the comparator 411.
  • the comparator 411 outputs the low level again. It can be found that the comparator 411 is high from the output to the low output, and the comparator 411 outputs a low level to the output high level, and the voltage calculation model of the non-inverting input terminal is different, so the voltage thresholds of the two are different.
  • the comparator 411 outputs a threshold value from a low level to a high level greater than a threshold value from a high level to a low level, so that the first voltage detection control circuit 705 realizes hysteresis voltage detection.
  • the specific circuit structure of the power take-off circuit 707 shown in FIG. 11 is as follows:
  • the power take-off circuit 707 may include a switch 803 through which the microphone end is connected to ground.
  • the microphone end of the mobile phone sleeps, which is reflected that the output voltage of the microphone end of the mobile phone becomes lower, and the power supply capability becomes weak.
  • the output voltage of the microphone terminal of the mobile phone becomes lower (below the voltage of the storage capacitor 822), so that the electric charge flows from the storage capacitor 822 back to the microphone end of the mobile phone.
  • the comparator 820 outputs a high level, which in turn controls the switch 817 to open.
  • the MCU 833 detects that the microphone end of the mobile phone is in a sleep state through the second voltage detection control circuit (the resistor 811 and the resistor 812), and triggers the mobile phone output through the control switch 803. high voltage.
  • the trigger mode may be to lower the voltage of the microphone end of the mobile phone by 25 ms after the microphone end of the mobile phone sleeps for 40 ms.
  • the signal processing circuit 710 is taken as an example for the MCU 833.
  • the energy storage circuit 704 of the earphone can also be connected to the biometric detection module 830 of the earphone through a switch 828.
  • the MCU 833 is used to control the guiding of the switch 828. Turn it on or off. In other words, the power of the biometric detection module 830 is controlled by the MCU 833.
  • the terminal device as a mobile phone as an example, when the mobile phone needs to send a command to the earphone, only a specific waveform needs to be sent on the right channel.
  • the MCU 833 and the biometric detection module 830 will receive an instruction, by which the MCU 833 can stop the calculation and display of the biometrics, and at the same time, the biometric detection module 830 sends the data to the mobile phone through the microphone to perform on the mobile phone. Calculation and display of biometrics. Further, as shown in FIG. 14, the biometric detection module can perform bidirectional communication with the MCU 833 through an internal integrated circuit (IIC)/serial peripheral interface (SPI).
  • IIC internal integrated circuit
  • SPI serial peripheral interface
  • the capacitor 822 in the tank circuit can also be connected to one end of a low dropout linear regulator (LDO) 827, and the other end of the LDO 827 can also be connected to ground through a capacitor 829.
  • the other end of the LDO 827 can also be connected to the biometric detection module 830 through the switch 828. Further, the other end of the LDO 827 can also be connected to the ground through a capacitor 831, thereby increasing the performance of the circuit.
  • the traditional wired earphone has the function of detecting biometrics (for example, heart rate) by adding a biometric detection module to a conventional wired earphone with a 3.5 mm audio interface.
  • the detection result can be displayed in real time by adding a biometric display module.
  • the biometric display module includes a plurality of light emitting diode LEDs.
  • the earphone may further include a biometric display module 712.
  • the biometric display module may indicate the value of the biometric by using a Light-Emitting Diode (LED) 832 or an Organic Light-Emitting Diode (OLED) or other visualization device.
  • LED Light-Emitting Diode
  • OLED Organic Light-Emitting Diode
  • heart rate intensity can be used, for example, LEDs of several different colors can be used to indicate different heart rate intensity intervals.
  • a blue LED can be used to represent a heart rate between 30 BPM and 80 BPM; wherein, the green LED represents a heart rate between 80 and 110 BPM; the red represents between 110 and 150 BPM; the yellow represents between 150 and 180 BPM; and the orange represents The heart rate range is between 180 and 220 BPM.
  • the biometric display module 712 can display the color while indicating the heart rate with different blinking frequencies. For example, the higher the heart rate LED blinking frequency, the higher the heart rate.
  • the biometric display module 712 can also use one LED to indicate a heart rate interval through different blinking speeds.
  • the earphone in the embodiment of the present invention does not require a battery, there is no need to charge, and it is not necessary to carry a charging cable or a charger. Moreover, it is easy to use and can be used by inserting a target device (for example, a mobile phone), thereby reducing the production cost of the earphone. Further, the earphone in the embodiment of the present invention can support the heart rate measurement on the earphone and indicate the heart rate interval, and further, by setting a storage circuit in the earphone for storing the charge from the microphone end of the earphone.
  • the energy storage circuit can normally supply power to the earphone, preventing the earphone from excessively consuming a large current, causing the power supply terminal voltage to drop excessively, thereby affecting the normal voice transmission of the earphone.
  • a voltage protection circuit for the earphone it is possible to prevent the circuit of the back end from being damaged when the voltage outputted by the power supply terminal is too large, thereby affecting the normal operation of the earphone.
  • the earphone performs biometric detection and listening to music, and the use of the microphone does not affect each other.
  • the power supply voltage of the signal processing module can be controlled in real time.
  • the division of the unit is only a logical function division, and the actual implementation may have another division manner, for example, multiple units or components may be combined or may be integrated into A branch, or some features can be ignored, or not executed.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like.

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Abstract

本申请提供了一种耳机的控制装置和有线耳机。该耳机的控制装置包括：逆流检测控制电路，该耳机的麦克端通过该逆流检测控制电路连接至该耳机的储能电路，该逆流检测控制电路用于比较该储能电路中的电压和该耳机的麦克端的电压，并根据比较的结果控制该储能电路与该麦克端之间电连接或电断开。本发明实施例中，当储能电路的电压高于耳机的麦克端的电压时，控制装置能够有效防止储能电路中的电荷向终端设备的供电端流失，以减少对电荷的浪费，进而能够避免由于储能电路中电荷的流失而导致耳机突然掉电。

Description

耳机的控制装置和有线耳机 技术领域
本发明实施例涉及电子技术领域，并且更具体地，涉及一种耳机的控制装置和有线耳机。
背景技术
随着可穿戴健康辅助设备的兴起，心率测量成为目前最为普遍的生理状态检测指标，耳朵具有丰富的毛细血管，在测量心率、血压、血氧等生理信号上具有很大的优势，具备进行心率测量的基本条件。当前市场已有一种无线心率检测耳机。具体地，通过蓝牙(Bluetooth)使得耳机与智能终端建立连接，传输心率数据或计算结果给手机。但是，这种耳机需要内置电池，也需要充电，且成本高，售价贵。而传统有线耳机一般只有语音传输和音乐播放、按键操作这几个基本功能，如果将心率检测功能集成在有线耳机时，由于受到有线耳机的供电方式的限制，与耳机配对的手机的供电端的输出电压较低且内阻较高，并不足以为心率检测功能提供足够的电能。
现有技术中，可以在耳机中设置一个储能电路，用于存储来自耳机的麦克端的电荷。这样，即使终端设备的耳机插头处的供电能力不足，通过该储能电路也可以为耳机正常供电，防止耳机在瞬间消耗大电流时，造成供电端电压下降过大，进而影响耳机功能。例如，心率检测功能等。但是，由于储能电路通常和耳机的麦克端相连，当储能电路的电压高于耳机的麦克端的电压时，储能电路中的电荷向终端设备的供电端流失，会造成不必要的浪费，进一步地，有可能导致耳机突然掉电。
发明内容
为了解决上述问题，本申请提供了一种耳机的控制装置和有线耳机，当储能电路的电压高于耳机的麦克端的电压时，控制装置能够有效防止储能电路中的电荷向终端设备的供电端流失，以减少对电荷的浪费，进而能够避免由于储能电路中电荷的流失而导致耳机突然掉电。
一方面，提供了一种耳机的控制装置，包括：
逆流检测控制电路，所述耳机的麦克端通过所述逆流检测控制电路连接 至所述耳机的储能电路，所述逆流检测控制电路用于比较所述储能电路中的电压和所述麦克端的电压，并根据比较的结果控制所述储能电路与所述麦克端之间的电连接或电断开。
本发明实施例中，当逆流检测控制电路确定储能电路的电压高于耳机的麦克端的电压时，可以通过该逆流检测控制电路控制储能电路与麦克端之间电断开，以防止储能电路中的电荷向终端设备的供电端流失，以减少对电荷的浪费，进而能够避免由于储能电路中电荷的流失而导致耳机突然掉电。此外，当逆流检测控制电路确定储能电路中的电压低于麦克端的电压时，可以通过该逆流检测控制电路控制储能电路和麦克端之间电连接，进而使得储能电路能够存储来自耳机的麦克端的电荷。
另一方面，提供了一种有线耳机，包括：第一方面所述的控制装置。
附图说明
图1是本发明实施例的具有3.5mm音频接头的有线耳机的结构示意图。
图2是本发明实施例的与3.5mm音频接头对应的终端设备的3.5mm音频接口的示例图。
图3是本发明实施例的生物特征检测模块的示意性框图。
图4和图5均为本发发明实施例的生物特征检测模块在耳塞中的设计位置的示意图。
图6是本发发明实施例的内置有生物特征检测模块的耳机的示意结构图。
图7是本发明实施例的耳机的逆流检测控制电路的位置的示意图。
图8是本发明实施例的耳机的供电电压控制电路的位置的示意图。
图9是本发明实施例的耳机的电压保护电路的位置的示意图。
图10是本发明实施例的信号隔离电路的位置的示意图。
图11是本发明实施例的耳机的示意性框图。
图12是本发明实施例的终端设备的供电端休眠时该供电端的电压波形图。
图13是本发明实施例的供电端休眠的终端设备在取电电路工作后的该供电端的电压波形图。
图14是本发明实施例的耳机的一个电路设计的示例图。
图15是本发明实施例的第一电压检测控制电路的一个示例结构图。
图16是本发明实施例的第一电压检测控制电路的另一个示例结构图。
图17是本发明实施例的耳机的另一个电路设计的示例图。
具体实施方式
下面结合附图对本发明实施例的技术方案进行介绍。
图1是本发明实施例的具有3.5mm音频接头的有线耳机的结构示意图。图2是本发明实施例的与3.5mm音频接头110b对应的终端设备的3.5mm音频接口的示例图。如图1所示，该有线耳机100包括：3.5mm音频接头110b，耳机线120，线控板130和耳塞140。其中，3.5mm音频接头110b可分为：麦克风(MIC)通讯接头111b、设备地(GND)电位接头112b、右耳塞喇叭接头113b和左耳塞喇叭接头114b。将如图1所示的3.5mm音频接头110b与智能终端相连(即将耳机插入智能终端)时，图1所示的麦克风(MIC)通讯接头111b、设备地(GND)电位接头112b、右耳塞喇叭接头113b和左耳塞喇叭接头114b分别与图2所示的麦克风(MIC)通讯接口111a、设备地(GND)接口112a、右喇叭接口113a和左喇叭接口114a相连，其中，麦克风通讯接口111a、设备地接口112a、右喇叭接口113a和左喇叭接口114a组成终端设备的音频接口110a。在实际工作中，数字模拟转换器(Digital to analog converter，DAC)将数字信号转换为模拟信号(以电流、电压或电荷的形式)与耳机通信或者为耳机供电。进一步地，麦克风通讯接口111a与终端设备的内部电平152相连，该内部电平152通过该麦克风通讯接口111a为耳机提供供电电压，在一些实施例中，该麦克风通信接口111a还可以称为终端设备的供电端，为了便于描述，下面以终端设备的供电端为例。应理解，传统有线耳机一般只有语音传输和音乐播放、按键操作这几个基本功能。本发明实施例中的有线耳机100可以内置有生物特征检测模块，该生物特征检测模块可以是任一种可对人体的生理状态进行检测的模块。例如，可以是生物特征检测模块711，压力检测模块，佩戴检测模块，血压检测模块，体温检测模块，血糖检测模块，血脂检测模块等其他生理信号或电路模块等等。还应理解，本申请不局限于耳塞式耳机，此处仅为示例性描述。本发明实施例中的有线耳机100可以内置有用于显示该生物特征检测模块检测结果的生物特征显示模块。
图3是本发明实施例的生物特征检测模块的示意性框图。如图3所示，该生物特征检测模块200可以包括采集模块220和计算控制模块210。采集模块210用于采集原始的心率数据(或经过处理的心率数据，或计算得到的心率结果)；计算控制模块210可以用于对采集模块220采集到的心率数据进行处理和计算；计算控制模块210还可以用于与手机以及采集模块220进行通信；计算控制模块210还可以用于控制整个该生物特征检测模块200或者该生物特征检测模块200中部分模块或电路的工作模式。在一个实施例中，采集模块220可以包括心率传感器221、发光二极管(LED)224、加速度传感器222和光学设计模块225，该心率传感器224可以包括光电二极管(PD)223。其中，心率传感器221控制发光二极管224发光，发出的光线经过皮肤组织作用后，传到光电二极管223，心率传感器221处理光电二极管223接收到的光信号，并将光信号量化为电信号，并经过模拟数字转换电路转换为数字信号，最后发送至标准数字通讯接口。例如，I2C接口、SPI接口。在一个实施例中，计算控制模块210可以包括供电控制模块211、微控制单元(Microcontroller Unit，MCU)\数字信号处理电路(Digital Signal Processing，DSP)212。该计算控制模块210可以用于控制采集模块220的供电、工作模式、计算并指示测量的心率结果等。
图4和图5为该生物特征检测模块200(尤其是采集模块220)在耳塞中的设计位置的示意图。如图4所示，本发明实施例中如图1所示的耳塞140可以包括：耳塞机构件141和如图3所示的采集模块220。具体地，该耳塞机构件141可以包括：后壳装饰件、后置壳、前置壳、硅胶套。如图5所示，该耳塞140还可以包括该喇叭模块142和多根线材123c，该多根线材123c分别与喇叭模块142和采集模块220相连。本发明实施例中的该生物特征检测模块200(尤其是采集模块220)可以设置在该有线耳机上的能够贴近耳朵的任意位置。
图6是本发发明实施例的内置有生物特征检测模块200(尤其是采集模块220)的耳机的示意结构图。如图6所示，采集模块220设置在左耳塞340b上，该图3所示的计算控制模块210可以设置于线控板330内。分束器322用于将第三线束321分为第一线束323-B和第二线束323-A，第一线束323-B通过该线控板330连接至第三线束323-C。应理解，图6所示的各个功能模块之间的连接关系仅仅为示例性描述，本发明实施例不做具体限定。例如， 如图6所示，采集模块220以设置在左耳塞340b上。在其它实施例中，采集模块220也可以设置在右耳塞340a上，或者同时设置在右耳塞340a和左耳塞340b上等等。又例如，如图6所示，该计算控制模块210可以设置于线控板330上。在其它实施例中，该计算控制模块210可以设置于右耳塞340a和/或左耳塞340b上，该计算控制模块210也可以集成单独设置在耳机内等等。本发明实施例不做具体限定。
由于本发明实施例中的耳机不需要电池，因此无需充电，不用携带充电线缆或充电器。而且使用方便，插入目标设备(例如，手机)就可以使用，进而降低耳机的生产成本。进一步地，本发明实施例中的耳机能够支持在耳机上完成心率测量并指示心率区间。但是，集成有生物特征检测模块的耳机插入终端设备(例如手机)时，只有麦克风(MIC)线(即耳机的麦克端)存在电流，即手机系统仅仅通过耳机的麦克端接收供电电压。而当耳机的麦克端电流过大或者过小时，都会影响耳机的正常工作。此外，由于麦克风产生的音频信号也通过手机端的MIC线传输到手机端。因此，对于通过电源线传输信号的设备(如手机输出MIC线)来说，不能对电源线上要传输的信号进行衰减，同时也不能让系统工作产生的电源波动干扰电源线上的信号，如果在耳机中内置有生物特征检测模块，很可能使得这两种信号之间产生干扰，进而降低用户体验。
一方面，为了解决耳机的麦克端电流过小或者终端设备的耳机插头处的供电能力不足的问题，本发明实施例中，可以为耳机内置一个用于存储来自耳机的麦克端的电荷的储能电路，这样，即使终端设备的耳机插头处的供电能力不足，通过该储能电路也可以为耳机正常供电，防止耳机在瞬间消耗大电流时，造成供电端电压下降过大，进而影响耳机的正常语音传输功能。
另一方面，为了保证储能电路中储存的电荷不会向终端设备放电，本发明实施例中，可以为耳机配置一个逆流检测控制电路。例如，如图7所示，耳机的控制装置400可以包括逆流检测控制电路420，该耳机的麦克端410通过该逆流检测控制电路420连接至该耳机的储能电路430，该逆流检测控制电路420用于比较该储能电路430中的电压和该耳机的麦克端410的电压，并根据该逆流检测控制电路420的比较结果控制该储能电路430与该麦克端410之间的电连接或电断开。
再一方面，为了保证即使存在储能电路的情况下，耳机的供电电压仍不 足以带动耳机中的各个模块或者电路正常工作时，耳机能够正常工作，本发明实施例中，可以为耳机进一步配置一个供电电压控制电路，该供电电压控制电路可以控制耳机中至少一个模块或电路的供电电压或者功耗，优选地，该供电电压控制电路可以控制耳机中信号处理电路的供电电压。例如，如图8所示，耳机的控制装置400可以包括供电电压控制电路440，该耳机的麦克端410通过该供电电压控制电路440连接至该耳机的储能电路430的输入端，该储能电路430的输出端通过供电电压控制电路440连接至信号处理电路450，该供电电压控制电路440用于获取该耳机的麦克端410的电压状况和/或该耳机的储能电路430的储能状况，并根据该麦克端410的电压状况和/或该耳机的储能电路430的储能状况控制该耳机的信号处理电路450的供电电压。换句话说，该供电电压控制电路440用于获取耳机的麦克端电压和/或储能电路的电压状况，进而控制耳机中各个模块或电路的供电电压或者工作模式。
相应的，针对耳机的麦克端电流过大或者终端设备的耳机插头处的供电能力过大的问题，本发明实施例中，可以为耳机内置一个电压保护电路。例如，如图9所示，耳机的控制装置400可以包括电压保护电路520，该耳机插入终端设备时，该电压保护电路520通过该耳机的麦克端510与该终端设备的供电端相连，该电压保护电路520用于接收该供电端输出的电压并输出该耳机的供电电压，其中，该供电端输出的电压大于或等于该供电电压。即该电压保护电路520可以通过控制该供电端输出的电压大于或等于该供电电压，防止该供电端输出的电压过大时损坏后端的电路，进而影响耳机的正常工作。作为示例，该供电端输出的电压高于阈值电压时，该电压保护电路520可以用于输出该阈值电压，该供电端输出的电压低于该阈值电压时，该电压保护电路520可以用于输出该供电端输出的电压。例如，该阈值电压为2.8伏特。
此外，为了保证系统工作产生的电源波动不对电源线(如手机输出MIC线)上要传输的信号产生衰减，本申请中，可以为耳机内置一个信号隔离电路，使得耳机工作时产生的电源波动不会干扰到电源线上传输的信号。例如，如图10所示，耳机的控制装置400可以包括信号隔离电路630，该耳机的麦克端610通过该声音拾取电路620连接至该信号隔离电路630的一端，其中，声音拾取电路620用于将接收到的声音信号转换为电信号。该信号隔离电路 630用于隔离该电信号和与该信号隔离电路630的另一端相连的电路(产生的电源波动)之间的干扰。
下面结合附图针对上述涉及的电压保护电路、逆流检测控制电路、信号隔离电路和供电电压控制电路的连接关系进行示例性说明：
图11是本发明实施例的耳机结构的示意性框图，图11中的实线可以表示电连接，虚线可以表示通信连接。具体地，该耳机包括各种电路或者模块的连接关系可以体现为：耳机的麦克端依次通过电压控制电路701、逆流检测控制电路702、信号隔离电路703以及储能电路704电连接至第一电压检测控制电路705，并通过该第一电压检测控制电路705分别电连接至信号处理电路710、声音拾取电路709和生物特征检测模块711。以信号处理电路710和第一电压检测控制电路705之间的连接为例，该第一电压检测控制电路705通过实线连接至信号处理电路710可以理解为该第一电压检测控制电路705电连接连接至该信号处理电路710。该第一电压检测控制电路705通过虚线双向连接至信号处理电路710可以理解为该第一电压检测控制电路705与该信号处理电路710可以进行双向通信。在实际操作中，该信号处理电路710可以通过向该第一电压检测控制电路705发送控制信号，以控制该第一电压检测控制电路705与该信号处理电路710之间电连接的导通或者关断。同理，如图11所示，该取电电路707可以通信连接至耳机的麦克端和信号处理电路710，该声音拾取电路709可以通信连接至耳机的麦克端，该生物特征检测模块711和生物特征显示模块712可以分别通信连接至信号处理电路710，该生物特征检测模块711也可以通过通信电路706通信连接至耳机的麦克端。
应当理解，图11所示的耳机中各个模块或者电路的连接关系仅为示例，在其它实施例中，耳机可以包括如图11所示的部分电路或者模块，例如，不包括逆流检测控制电路702或者第一电压检测控制电路705等等。又例如，耳机的麦克端可以通过该电压保护电路701也可以与信号处理电路710通信连接，即，通过信号处理电路710控制该电压保护电路701的工作模式(例如开启或者不开启)。
针对耳机的麦克端的电压控制，本实施例中引入了取电电路707。由此，终端设备的供电端的输出电压过低时，本实施例中的取电电路707可以生成并向耳机插入的终端设备发送第三信号，该第三信号用于激励终端设备的供 电端增大输出的电压。在一个可选地实施例中，该取电电路707可以用于向终端设备传送一个信号(比如将手机的麦克端的电压拉低)，该信号用于触发终端设备的电源端输出高电压。以终端设备为手机为例，例如，图12所示手机的麦克端的电压过低时，该取电电路707可以将手机的麦克端的电压拉低并维持一段时间(如图13所示的T ms)，用于触发手机再次提高手机端的麦克端的输出能力。需要注意的是，图11所示的声音拾取电路709可以用于接受外界声音信号，再转换为电信号传送给终端设备。在一个可选地实施例中，为了节省功耗，该声音拾取电路709的供电可以受该信号处理电路710或者其它电路或者模块的控制。
应当理解，上述终端设备的供电端的输出电压过低的情况包括但不限于以下情况：终端设备的供电端(如手机3.5mm口输出的麦克风端的电压)不稳定。终端设备在没有使用麦克风的时候，即终端设备的麦克端休眠(表现为输出电压降低内阻增大)。耳机按键按下时电压过低的情况。以终端设备为手机为例，可选地，手机3.5mm接口的供电模式可以包括：不供电模式、强供电模式和弱供电模式中的至少一种。手机3.5mm接口处于强供电模式时，声音拾取电路709可以正常工作，当手机3.5mm接口处于弱供电模式时，声音拾取电路709不一定可以正常工作。本发明实施例中的声音拾取电路709可以是麦克风电路，也可以是其它类型的用于通话的模块，本发明实施例不做具体限定。可选地，手机接口处于强供电模式时，手机接口的内部电平(如图2所示的152)可以高于1.6v的供电电压；而当手机接口处于弱供电模式的时候，手机接口的内部电平可以是低于1.8v的供电电压；应理解，不同手机的强弱供电模式会有一定差异。上述数字仅为示例性说明。例如，在其他实施例中，手机接口处于弱供电模式的时候，手机接口的内部电平也可以是低于1.7v的供电电压。在实际工作中，相应的手机3.5mm接口处于强供电模式时，可以为耳机提供充足的供电电压。然而，当手机3.5mm接口处于弱供电模式时，耳机的供电电压为休眠电压(例如，从2.7v工作电压降低到1.4v的休眠电压)。需要注意的是：手机接口处于强供电模式的情况可以包括：有线耳机插入手机，且麦克风相关应用程序打开(比如通话)；或者，当没有麦克风应用程序打开的时候，即声音拾取电路709处于空闲状态；例如，有线耳机插入后的一段时间内；又例如，按键按压后的一段时间内；或者，麦克风相关应用停止使用后的一段时间内。相应的，其它时间段， 手机接口处于弱供电模式。
针对耳机的麦克端的电压检测，本实施例中引入了第二电压检测控制电路708，第二电压检测控制电路708配置为及时检测终端设备的供电端的电压(如手机3.5mm口输出的麦克风端的电压)，即耳机的麦克端电压，当检测到耳机的麦克端电压过低时可以通过信号处理电路710让耳机进入相应的工作模式并进行相应的处理，如进入低功耗模式，并进行相关的动作以触发终端设备输出更高的电压(例如触发取电电路707工作)。换句话说，该第二电压检测控制电路708测量耳机的麦克端的电压情况，并输出用于表征手机的麦克端供电电压状况的信号到信号处理电路710，以便该信号处理电路根据此信号让耳机进入相应的工作模式并进行相应的处理。以声音拾取电路709为例，该第二电压检测控制电路708可以生成并向该信号处理电路710发送第四信号，该第四信号用于表示耳机的麦克端的电压状况，该信号处理电路710接收到该第四信号后，可以基于该第四信号控制取电电路709。
以终端设备为手机为例，本实施例中的手机的供电端的供电模型可以为电压源+电阻的方式，即手机的供电端即可以提供电源，又可以接受信号。由此，本发明实施例中的储能电路704可以存储手机的供电端输出的弱电流，待电荷存储足够时启动后续电路工作。
结合该储能电路704来说，一方面，本发明实施例中引入了逆流检测控制电路702，其可以用于控制电流的流动方向，具体地，当手机的供电端输出电压较高时，用于向系统提供电能，当手机的供电端输出电压低，防止储能电路704的电荷流失。换句话说，本实施例中的逆流检测控制电路702可以用于限制电流的单向流动，即只允许电流从手机的供电端流向后面电路，防止电流从后面电路流向手机的供电端。
另一方面，本发明实施例中引入了第一电压检测控制电路705，其可以用于检测储能电路704的电压，具体地，当该第一电压检测控制电路705检测到储能电路704上的电压达到系统正常工作的电压时，通过该耳机麦克端的电压和该储能电路704中存储的电荷给耳机中的各个模块或者电路供电。当该第一电压检测控制电路705检测到储能电路704上的电压过低时，给耳机或者耳机中的部分模块或电路发送一个去电电压信号，提醒系统电压不足以便系统做出相应的处理(如进入低功耗模式)，或者控制耳机中的部分模块或电路的供电电压。换句话说，该第一电压检测控制电路705可以用于检 测储能电路704的电荷电压，当检测储能电路704的存储电压达到某一阈值时便可以向储能电路704的后级电路提供电能，进一步地，还可以输出信号到信号处理电路710，此信号表征储能电路704的电荷存储多少。
此外，在实际通信中，对于通过电源线传输信号的设备(如手机输出MIC线)来说，需要避免电源线上要传输的信号发生衰减，同时也需要避免耳机工作产生的电源波动干扰到电源线上的信号。本发明实施例中的信号隔离电路703可以让这两种信号产生隔离效果，即能够防止隔离声音拾取电路709输出的信号(此信号由声音转化并传输到手机)发生衰减，同时能够防止因为该信号隔离电路703的后面电路工作引起的电源波动影响到声音拾取电路709的输出信号。
以终端设备为手机为例，本实施例中的通信电路706负责手机与耳机的通信功能。通信电路706将信号处理电路710的数据(心率值、系统状态等)以及生物特征检测模块711的数据(心率原始数据等)收集，通过手机端的MIC供电端传输到手机端。同时将手机端发送的数据(通过手机的右声道线传输到通信电路706)对应的发送到信号处理电路710以及生物特征检测模块711。可选地，通信电路706还可以包括按键信号，将按键信号发送至手机端。其中，该信号处理电路710可以是整个耳机的控制中枢，具体地，该信号处理电路710可以用于读取生物特征检测模块711的原始心率数据，并用于计算心率值。该信号处理电路710也可以用于控制生物特征显示模块712显示生物特征的值或生物特征所在的区间。该信号处理电路710也可以用于控制该第一电压检测控制电路705的供电。该信号处理电路710还可以用于与通信电路706之间进行数据交换。该信号处理电路710还可以用于接收第二电压检测控制电路708输出信号，判断耳机的麦克端的电压状况。该信号处理电路710还可以用于控制取电电路707工作，触发手机的麦克端输出高电压。此外，生物特征检测模块711可以靠近用户皮肤放置，获取用户原始的心率数据，生物特征显示模块712显示当前用户的显示生物特征的值或生物特征所在的区间。
在实际操作中，以终端设备为手机为例，耳机的工作流程可以包括：耳机插入手机端的3.5mm耳机孔时，手机的供电端输出电压，电压控制电路701用于限制手机输出电压，防止手机输出电压过高，损坏后端电路。由于整个耳机第一次插入，储能电路704中没有电荷存储，电流通过电压保护电 路701，流过逆流检测控制电路702以及信号隔离电路703流入储能电路704进行存储。当第一电压检测控制电路705检测到储能电路704的电压达到阈值电压(如2V)时，该储能电路704给该储能电路704后端的模块或者电路供电，如信号处理电路710，声音拾取电路709以及生物特征检测模块711等。该储能电路704后端的模块或者电路获得供电后，开始正常工作。进一步地，该信号处理电路710获得供电后，控制生物特征检测模块711并获取相应的心率原始数据，并进行心率信号的运算，通过生物特征显示模块712显示出来。
当有按键按下时，通信电路706产生按键信号，将手机的麦克端的供电电压拉低。一方面，第二电压检测控制电路708将手机的麦克端的供电电压上的低电压信号发送到信号处理电路710，信号处理电路710进行相应的处理以节省功耗，如停止生物特征检测与显示，断开声音拾取电路709的供电。另一方面，当有按键信号产生的时候，手机的麦克端的供电电压会低于储能电路704的电压，逆流检测控制电路702便会断开通路，防止储能电路704的电荷流回手机的麦克端。当手机系统在使用麦克风时，声音拾取电路709会将声音信号转换为电信号，传送到电压保护电路701的输出端，从而传输到手机的麦克端上。由于逆流检测控制电路702和信号隔离电路703的存在，使得声音拾取电路709的输出信号不被衰减。同时耳机工作时产生的电源波动也由于信号隔离电路703的存在不会传输到手机的麦克端。需要注意的是，对于一些手机，在手机系统不使用麦克风时，其麦克端有可能会进行休眠，体现为输出电压变低，内阻增大，供电能力变弱。此时，一方面，逆流检测控制电路702可以用于阻止储能电路704的电荷流向手机的麦克端。另一方面，第二电压检测控制电路708会检测到此信号，并发出信号到信号处理电路710，信号处理电路710检测到手机麦克风供电休眠，随后发送取电信号到取电电路707，取电电路707会触发手机，促使手机的供电端输出的电压为高电压。
综上所述，本发明实施例中，通过引入取电电路707、第二电压检测控制电路708、逆流检测控制电路702以及第一电压检测控制电路705，使得耳机的麦克端的电压过低时，可以通过取电电路707能够激励终端设备增大的供电端输出的电压。并且，信号处理电路710可根据该第二电压检测控制电路708测量耳机的麦克端的电压情况和/或该第一电压检测控制电路705 测量的储能电路的电荷状况，让耳机进入相应的工作模式并进行相应的处理，进而为耳机中的各个模块或者电路合理分配电能。此外，逆流检测控制电路702能够有效防止储能电路中的电荷向手机的供电端流失，避免了对储能电路中电荷的浪费。最后，信号隔离电路703可以有效降低声音拾取电路709和后端电路之间的干扰。
应当理解，图11所示的信号处理电路710可以是根据该耳机中的模块或者电路(例如，第二电压检测控制电路708和/或第一电压检测控制电路705)的检测结果，控制该信号处理电路710以及该耳机中其它电路或者模块(例如，取电电路707、生物特征检测模块711以及生物特征显示模块712)的供电电压的。该信号处理电路710可以为微控制单元(Microcontroller Unit，MCU)\数字信号处理电路(Digital Signal Processing，DSP)，用于控制耳机中各个模块或者电路的供电、工作模式以及数据，更具体地，用于根据实际需求对有线耳机中的各个电路或者模块的工作模式(即，功耗)进行控制的。例如，计算并指示测量的心率结果等。而本发明实施例的该电压保护电路701用于控制通过所述耳机的麦克端与所述终端设备的供电端的输出电压的，即对耳机的输入电压的控制。还应当理解，图3所示的计算控制模块210可以用于控制采集模块220的供电、工作模式、计算并指示测量的心率结果为示例性描述。但本发明实施部不限于此。例如，在其它实施例中，该计算控制模块210也可以集成设置与该信号处理电路710，即，该采集模块220可以单独设计，由此该采集模块220采集到数据后，可以将采集的数据发送给信号处理电路710，由信号处理电路710控制采集模块220的供电、工作模式、计算并指示测量的心率结果。
还应当理解，图11所示的各个电路或者模块可以单独作为耳机的控制装置或者电路生产，也可以部分集成为耳机的控制装置生产，也可以全部集成在一个工件上作为耳机的总控制装置生产，本发明实施例不做具体限定。例如，该电压保护电路701可以为有线耳机的一个部件进行生产，也可以集成在信号处理电路710上进行生产，即，作为信号处理电路710的组成部分。结合图6来说，图11所示的各个电路或者模块可以单独或者集成设置于该有线耳机的线控板内，也可以单独或者集成设置在耳塞(右耳塞340a和左耳塞340b)上。在其它实施例中，图11所示的各个电路或者模块可以拆分成多个模块或电路分别设置于线控版330、左耳塞340b以及右耳塞340a上。 本发明实施例不做具体限定。进一步地，本发明实施例的涉及的各个模块或者电路可以内置于任一种有线耳机，该有线耳机与智能终端配套使用。特别是具备3.5mm音频输出接口的智能终端。例如：手机、平板电脑、笔记本电脑、电脑、MP3以及MP4等。本发明实施例仅以将控制装置内置于有线耳机，有线耳机和手机配套使用的场景进行示例性说明，但本发明实施例不限于此。
图14是本发明实施例的耳机的一个电路设计的示例图。图15是图11的第一电压检测控制电路705的一个示例图。图16是图11的第一电压检测控制电路705的另一个示例图。图17是本发明实施例的耳机的另一个电路设计的示例图。下面结合具体电路设计对上述各个电路和模块进行示例性说明。
针对图11所示的逆流检测控制电路702的具体电路结构：
在一个示例中，如图14所示，该逆流检测控制电路702可以包括：电阻813、电阻814、电阻819、电阻815、开关817、二极管818、比较器820以及非门816。具体地，以终端设备为手机为例，当电流从手机的麦克端流向后级电路(如电容821、电容822)时，使得比较器820的反向端电压高于同相端电压，比较器820输出为低电平，经过非门816后，控制开关817闭合。在此，二极管818为电流提供通路。当电流从后端流向手机的麦克端时，比较器820的同相端的电压高于反相端，比较器820输出为高电平，经过非门816控制开关817断开。此刻二极管818处于反相截止状态，可以防止储能模块中电荷流失。换句话说，当按键802按下时，耳机麦克端上的电压变低，电荷会从储能电容822，经过电阻823、开关817、电阻814、LDO804、电阻801以及按键802流向地。电流流过电阻814使比较器820的同相端电压高于反相端电压。比较器820输出为高电平，开关817断开。由于存在反馈电阻815，使比较器820输出为高电平电压时能够保证比较器的同相端电压一直大于反向端电压，保证开关817一直处于断开状态。
在又一示例中，如图17所示，该逆流检测控制电路702可以包括：MOS管917、比较器920和电阻919；该麦克端通过该MOS管917连接至该储能电路704；该比较器920的负输入端与该耳机的麦克端相连，该比较器920的正输入端与该储能电路704相连，该比较器920的输出端通过该电阻919连接至该MOS管917的栅极。进一步地，为了提高该流检测控制电路702 的性能，即提高储能电路中的电荷向终端设备的供电端流失的阻止效果，该逆流检测控制电路702还可以包括：MOS管916和电阻918；该MOS管917的漏极与该MOS管916的漏极相连；该比较器920通过该电阻918连接至该MOS管916的栅极。更进一步地，为了提高该流检测控制电路702的性能，该逆流检测控制电路702还可以包括：第三电阻(图中未标示)；该MOS管917通过该第三电阻连接至该MOS管916。在实际工作中，当耳机的麦克端的电压高于电容923的电压时，比较器920输出为低电平，MOS管916和MOS管917导通，电流从耳机的麦克端流向电容923以及电容924。当耳机的麦克端的输出电压低于电容923的电压时，比较器920输出为高电平。MOS管917和MOS管916截止，以防止电荷从电容923和电容924向耳机的麦克端流失。进一步地，为了增大第一比较器920同相端和反相端之间的电压差，可以在MOS管917和MOS管916之间串联电阻，让流过MOS管917和MOS管916的电流也流过该电阻。
针对图11所示的信号隔离电路703的具体电路结构：
在一个示例中，如图14所示，该信号隔离电路703可以包括：电阻814、电阻823、电容821和电容822；该声音拾取电路709与该电阻814的一端相连，该电阻814的另一端通过该电容821连接至地，该电阻814的另一端还通过该电阻823连接至该电容822的一端，该电容822的另一端接地。其中，电阻814和电容821隔离麦克风(MIC)806输出的声音信号，防止MIC806输出的声音信号有过大的衰减以及干扰后级电路工作；电阻823、电容821和电容822用于滤除系统工作产生电源噪声干扰到前级电路。在一种可能的实现方式中，该电容821和/或该电容822可以构成该耳机的储能电路704，用于向对耳机的麦克端的弱电流进行存储并为其它电路或模块供电。
在又一示例中，如图17所示，该信号隔离电路703可以包括：低压差线性稳压器(LDO)921、电阻922、电容923和电容924；该麦克端通过电压控制电路701连接至逆流检测控制电路702的输入端，该逆流检测控制电路的输出端与该LDO 921的一端相连，该LDO 921的另一端通过该电容923连接至地，该LDO 921的另一端还通过该电阻922连接至该电容924的一端，该电容924另一端接地。具体地，该LDO 921可用于防止MIC 909输出的信号衰减。其原理如下，假设设定LDO 921输出电压较低(如2V)，当LDO 921的输入电源高于2V，即使输入端电源波动，也不会影响输出。在 一种可能的实现方式中，该电容923和/或该电容924可以构成该耳机的储能电路704。
针对图11所示的声音拾取电路709的具体电路结构：
作为一个示例，如图14所示，该声音拾取电路709可以包括：电容805、麦克风806、电容807、电阻808、开关809和非电路810；该耳机的麦克端与该电容805的一端相连，该电容805的另一端通过该麦克风806与该电容807的一端相连，该电容807的一端通过该电阻808连接至该开关809的一端，该开关809的另一端与耳机的麦克端相连，该电容807的另一端接地；该耳机的信号处理电路710用于控制该开关809的导通或关断。换句话说，声音拾取电路709可以由电容805、麦克风806、电容807、电阻808、开关809和非电路810构成。本实施例中，该信号处理电路710可以为MCU 933，该声音拾取电路709供电的由MCU 933通过控制开关809实现。麦克风806将声音转换为电信号，通过电容805传送到手机麦克风供电端上。
针对图11所示的第二电压检测控制电路708的具体电路结构：
作为一个示例，如图14所示，该第二电压检测控制电路可以包括：电阻811和电阻812；以该信号处理电路710为MCU 833为例，该耳机的麦克端通过该电阻811连接至该电阻812的一端，该耳机的麦克端通过该电阻811连接至该信号处理电路710，该电阻812的另一端接地。本实施例中，通过电阻811和电阻812分压后可以获得分压值，将该分压值输入到MCU 833中，可以通过MCU 833中的比较器模数转换器(Analog-to-Digital Converter，ADC)等模块检测，在此MCU 833可以提供有信号处理功能。
此外，针对图11所示的信号处理电路710和第一电压检测控制电路705的连接关系。作为一个示例，如图14所示，以该信号处理电路710为MCU833为例，该第一电压检测控制电路824的输出端连接至该或电路825的第一输入端，该第一电压检测控制电路824用于生成并向该或电路825发送第一信息。该耳机的麦克端通过该第二电压检测控制电路(未标示)连接至MCU 833的一端，该第二电压检测控制电路的另一端与该或电路825的第二输入端相连，该MCU 833用于生成并向该或电路825发送第二信号。在实际工作中，由于或电路825为双输入或门，或门的特点有一个为高输出就是高。因此，该第一电压检测控制电路824检测到储能电路703的电压达到阈值电压时，该第一电压检测控制电路824输出高电平，该或电路825也输出 高电平。此外，该MCU 833有电时，该MCU 833向或电路825输出高电平，该或电路825也输出高电平，这样，当该第一电压检测控制电路824即使输出为低电平时，也会保证电路825输出高，防止MCU 833等的意外以及频繁断电。同时，该第一电压检测控制电路824也可以向MCU 833发送储能电路的储能状况信息，可选地，当该第一电压检测控制电路824输出为低电平时，可以表示储能电路电压不足，进而MCU 833可以进行相应的操作减低整体功耗。
需要注意的是，图14所示的第一电压检测控制电路824可配置有迟滞电压检测功能。例如，当储能电路704上的电压达到2V时输出为高电平，直到储能电路704电压降至1.85V，其输出才为低电平。在实际工作中，当该第一电压检测控制电路824输出为高电平时，或电路825也输出为高电平，由此闭合开关826给MCU 833供电，同时MCU 833的输出引脚可以连接到或电路825的另一个输入端，即MCU 833上电后输出高电平到或电路825的输入端，也可用于维持MCU 833的正常供电，由此只要该第一电压检测控制电路824和MCU 833任一个输出为高电平就能保证MCU 833有电。进一步地，MCU 833可以通过控制开关828的导通或者关断来控制生物特征检测模块830的供电，MCU 833还可以用于计算用户当前的生物特征的值(比如心率值)，并通过LED 832显示出来。在MCU 833计算生物特征的值时，如果系统功耗过大，会使储能电容822上电压低于1.85V，第一电压检测控制电路824输出为低电平，同时MCU 833获得此信号，会采用相应措施(如停止心率采集与计算，MCU 833进入睡眠模式)，降低系统功耗。
针对图11所示的第一电压检测控制电路705的具体电路结构：
作为一个示例，如图15所示，该第一电压检测控制电路824可以包括：电阻401、电阻402、电阻403、比较器404、比较器405和触发器406；该电阻401的一端与该储能电路704相连，该电阻401的另一端通过该电阻402连接至该电阻403的一端，该电阻403的另一端接地，该电阻401的另一端与该比较器404的负输入端相连，该电阻402的一端与该比较器405的正输入端相连，该比较器404的正输入端和该比较器405的负输入端接收参考电压，该比较器404的输出端与该触发器406的R输入端相连，该比较器405的输出端与该触发器406的S输入端相连。换句话说，电阻401、电阻402和电阻403串联，电阻401连接被测电压，电阻403连接地，并对被测电压 (Vi)分压；比较器404的同相输入端接参考电压，反向输入端接电阻401和电阻402的相交处，比较器404的输出端接触发器406的R端。比较器405的同相输入端连接到电阻401和电阻402的相交处，比较器405的反向输入端连接参考电压，输出端连接到触发器406的S端；使用触发器406的Q作为电压检测的信号。
根据触发器406输出状态方程
Figure PCTCN2018082800-appb-000001
可知，当被测电压(Vi)的电压过低，以至于比较器404的反相输入端电压低于参考电压。此时，比较器404输出为高电平，比较器405输出为低电平，则触发器406的Q端输出为低电平。当Vi电压逐渐升高，使得比较器404的反向输入端的电压高于参考电压，但是比较器405的同相输入端电压低于参考电压，此时，比较器404输出为低电平，比较器405输出为低电平，则触发器406的Q端输出为低电平。当Vi电压再次升高，使得比较器404的反向输入端电压高于参考电压，比较器405的同相输入端高于参考电压，则比较器404输出为低电平，比较器405输出为高电平，则触发器406的Q端输出为高电平。如果此时被测电压减小至比较器404的反向输入端电压大于参考电压，但是比较器405的同相输入端的电压小于参考电压。此时，比较器404输出为低电平，比较器405输出为低电平，但是触发器406的Q端的前一状态为高电平，因此触发器406的Q端的当前状态也为高电平。被测电压继续降低，低至比较器404的反向输入端电压小于参考电压，比较器405的同相输入端电压小于参考电压，则比较器404输出为高电平，比较器405输出为低电平。当前触发器406的Q端输出为低电平。由此，可以实现迟滞电压的检测。本实施例中，通过调节电阻401、电阻402以及电阻403的比例还可以调节迟滞电压的检测范围。
作为又一示例，如图16所示，该第一电压检测控制电路824可以包括：电阻407、电阻409、电阻408和比较器411；该储能电路704通过该电阻407连接至该电阻409的一端，该电阻409的另一端与该比较器411的输出端相连，该比较器411的负输入端接收参考电压，该比较器411的正输入端通过该电阻408连接至地。换句话说，电阻407连接被测电压与比较器411的同相输入端，电阻409连接比较器411的输出端与同相输入端，电阻408连接比较器411的同相输入端与地，比较器411的反相输入端连接参考电压。在实际工作中，当被测电压足够低，以至于比较器411的同相输入端的电压 小于参考电压，则比较器411输出为低电平。当被测电压升高时，比较器411的同相输入端电压为电阻408与电阻409并联后的总阻值与电阻407的分压。当电压升高至比较器411的同相输入端电压高于参考电压时，比较器411输出为高电平，此刻，相当于改变了比较器411同相输入端电压的计算模型。当电压下降一定值使得比较器411的同相输入端的电压低于参考电压值，则比较器411再次输出为低电平。可以发现，比较器411从输出高到输出低，与比较器411输出为低电平到输出为高电平，其同相输入端的电压计算模型不同，因此两者测电压阈值不同。换句话说，比较器411输出从低电平到高电平的阈值大于从高电平到低电平的阈值，使得第一电压检测控制电路705实现了迟滞电压检测。
针对图11所示的取电电路707的具体电路结构：
作为一个示例，如图14所示，该取电电路707可以包括：开关803；该麦克端通过该开关803连接至地。以终端设备为手机为例，在手机系统不使用麦克风时，手机的麦克端休眠，体现为手机的麦克端的输出电压变低，供电能力变弱。而手机的麦克端输出电压变低(低于储能电容822电压)，会使电荷从储能电容822里流回手机的麦克端。此刻，比较器820输出为高电平，进而控制开关817断开。同时，以信号处理电路710为MCU 833为例，MCU 833会通过第二电压检测控制电路(电阻811和电阻812)检测到手机的麦克端在休眠状态，便会通过控制开关803，触发手机输出高电压。可选地，触发方式可以为在手机的麦克端休眠40ms后将手机的麦克端的电压拉低25ms。
如图14所示，以信号处理电路710为MCU 833为例，该耳机的储能电路704还可以通过开关828连接至该耳机的生物特征检测模块830，MCU 833用于控制该开关828的导通或关断。换句话说，生物特征检测模块830的供电受到MCU 833的控制。以终端设备为手机为例，当手机需要向耳机发送命令时，只需要在右声道上发送特定的波形。MCU 833和生物特征检测模块830便会收到指令，通过此操作可以让MCU 833停止生物特征的计算与显示，同时让生物特征检测模块830将数据通过麦克端发送数据到手机，以便在手机进行生物特征的计算与显示。进一步地，如图14所示，该生物特征检测模块可以通过内部集成电路(IIC)/串行外设接口(SPI)与MCU 833进行双向通信。如图14所示，作为一个示例，该储能电路中的电容822还 可以与低压差线性稳压器(LDO)827的一端相连，该LDO 827的另一端还可以通过电容829连接至地，该LDO 827的另一端还可以通过该开关828连接至该生物特征检测模块830，进一步地，该LDO 827的另一端还可以通过电容831连接至地，进而增加电路的工作性能。
应理解，上文结合图14至图17所示的各个模块或电路之间连接关系、各个模块或者电路的具体电路结构仅为示例性描述，为避免重复，针对图14和图17中电路结构相同的部分不再赘述(例如，取电电路和第二电压检测控制电路以及通信电路)。
本发明实施例中，通过在传统的具有3.5mm音频接口的有线耳机上增加生物特征检测模块，使得传统有线耳机具备检测生物特征(例如，心率)的功能。此外，通过增加生物特征显示模块可以实时显示检测结果。作为一个示例，该生物特征显示模块包括多个发光二极管LED。如图11所示，该耳机还可以包括生物特征显示模块712。进一步地，如图14所示，生物特征显示模块可以通过发光二极管(Light-Emitting Diode，LED)832或有机发光二极管(Organic Light-Emitting Diode，OLED)或其他可视化设备指示生物特征的值，以心率强度为例，例如：可以利用几个不同色彩的LED指示不同的心率强度区间。例如，可以用蓝色LED代表心率在30BPM～80BPM之间；其中，绿色LED代表心率在80～110BPM之间；用红色代表110～150BPM之间；用黄色代表150～180BPM之间；用橙色代表心率区间在180～220BPM之间。应理解，上述心率强度区间和指示方式仅为本发明实施例的示例，本发明实施例不限于此。例如，生物特征显示模块712可以显示颜色的同时，也可以配合不同的闪烁频率指示心率快慢。例如，心率LED闪烁频率越高时，心率相应的也越高。又例如，生物特征显示模块712也可以使用一个LED通过不同的闪烁速度来指示心率区间。
由于本发明实施例中的耳机不需要电池，因此无需充电，不用携带充电线缆或充电器。而且使用方便，插入目标设备(例如，手机)就可以使用，进而降低耳机的生产成本。进一步地，本发明实施例中的耳机能够支持在耳机上完成心率测量并指示心率区间，进一步地，通过在耳机中设置一个储能电路，用于存储来自耳机的麦克端的电荷。这样，即使终端设备的耳机插头处的供电能力不足，通过该储能电路也可以为耳机正常供电，防止耳机在瞬间消耗大电流时，造成供电端电压下降过大，进而影响耳机的正常语音传输 功能。进一步地，通过为耳机内置一个电压保护电路，能够防止该供电端输出的电压过大时损坏后端的电路，进而影响耳机的正常工作。更进一步地，通过为耳机内置一个信号隔离电路，使耳机进行生物特征检测与听音乐，使用麦克风互不影响。更进一步地，通过为耳机内置一个逆流检测控制电路，能够防止因为手机输出电压突然降低，导致的耳机储能电路的电荷流失，进而避免耳机突然掉电。更进一步地，通过为耳机内置一个供电电压控制电路，可以实时控制信号处理模块的供电电压。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及电路，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。在本申请所提供的几个实施例中，应该理解到，所揭露的电路、支路和单元，可以通过其它的方式实现。例如，以上所描述的支路是示意性的，例如，该单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到一个支路，或一些特征可以忽略，或不执行。所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以该权利要求的保护范围为准。

Claims (19)

  1. 一种耳机的控制装置，其特征在于，包括：
    逆流检测控制电路；
    所述耳机的麦克端通过所述逆流检测控制电路连接至所述耳机的储能电路，所述逆流检测控制电路用于比较所述储能电路中的电压和所述麦克端的电压，并根据比较的结果控制所述储能电路与所述麦克端之间的电连接或电断开。
  2. 根据权利要求1所述的控制装置，其特征在于，所述逆流检测控制电路包括：
    第一MOS管、第一比较器和第一电阻；
    所述麦克端通过所述第一MOS管连接至所述储能电路；
    所述第一比较器的负输入端与所述耳机的麦克端相连，所述第一比较器的正输入端与所述储能电路相连，所述第一比较器的输出端通过所述第一电阻连接至所述第一MOS管的栅极。
  3. 根据权利要求2所述的控制装置，其特征在于，所述逆流检测控制电路还包括：
    第二MOS管和第二电阻；
    所述第一MOS管的漏极与所述第二MOS管的漏极相连，所述第二MOS管的源极与所述储能电路相连；
    所述第一比较器的输出端通过所述第二电阻连接至所述第二MOS管的栅极。
  4. 根据权利要求3所述的控制装置，其特征在于，所述逆流检测控制电路还包括：
    第三电阻；
    所述第一MOS管通过所述第三电阻连接至所述第二MOS管。
  5. 根据权利要求1至4中任一项所述的控制装置，其特征在于，所述控制装置还包括：
    信号隔离电路，所述耳机的麦克端通过耳机的声音拾取电路连接至所述信号隔离电路的一端，所述声音拾取电路用于将接收到的声音信号转换为电信号；所述信号隔离电路用于隔离所述电信号和与所述信号隔离电路的另一 端相连的电路之间的干扰。
  6. 根据权利要求5所述的控制装置，其特征在于，所述信号隔离电路包括：
    限流元件、第五电阻、第一电容和第二电容；
    所述声音拾取电路与所述限流元件的一端相连，所述限流元件的另一端通过所述第一电容连接至地，所述限流元件的另一端还通过所述第五电阻连接至所述第二电容的一端，所述第二电容的另一端接地；
    其中，所述限流元件为第四电阻或者第一低压差线性稳压器LDO。
  7. 根据权利要求5或6所述的控制装置，其特征在于，所述声音拾取电路包括：
    第三电容、麦克风、第四电容、第六电阻、第一开关和非电路；
    所述耳机的麦克端与所述第三电容的一端相连，所述第三电容的另一端通过所述麦克风与所述第四电容的一端相连，所述第四电容的一端通过所述第六电阻连接至所述第一开关的一端，所述第一开关的另一端与所述麦克端相连，所述第四电容的另一端接地。
  8. 根据权利要求1至7中任一项所述的控制装置，其特征在于，所述控制装置还包括：
    供电电压控制电路，用于控制所述耳机的信号处理电路的供电电压；
    其中，所述供电电压控制电路包括：
    第一电压检测控制电路、或电路及第二开关；
    所述第一电压检测控制电路的输出端连接至所述或电路的第一输入端，所述第一电压检测控制电路用于生成并向所述或电路发送第一信号；
    所述信号处理电路的输出端与所述或电路的第二输入端相连，所述信号处理电路用于生成并向所述或电路发送第二信号；
    所述储能电路通过所述第二开关连接至所述信号处理电路；
    所述或电路用于接收所述第一信号和所述第二信号，并根据所述第一信号和/或所述第二信号控制所述第二开关的导通或关断。
  9. 根据权利要求8所述的控制装置，其特征在于，所述第一电压检测控制电路包括：
    第七电阻、第八电阻、第九电阻、第二比较器、第三比较器和触发器；
    所述第七电阻的一端与所述储能电路相连，所述第七电阻的另一端通过 所述第八电阻连接至所述第九电阻的一端，所述第九电阻的另一端接地，所述第七电阻的另一端与所述第二比较器的负输入端相连，所述第八电阻的一端与所述第三比较器的正输入端相连，所述第二比较器的正输入端和所述第三比较器的负输入端接收参考电压，所述第二比较器的输出端与所述触发器的R输入端相连，所述第三比较器的输出端与所述触发器的S输入端相连；
    或者，所述第一电压检测控制电路包括：
    第十电阻、第十一电阻、第十二电阻和第四比较器；
    所述储能电路通过所述第十电阻连接至所述第十一电阻的一端，所述第十一电阻的另一端与所述第四比较器的输出端相连，所述第四比较器的负输入端接收参考电压，所述第四比较器的正输入端通过所述第十二电阻连接至地。
  10. 根据权利要求1至9中任一项所述的控制装置，其特征在于，所述控制装置还包括：
    取电电路；
    所述耳机的麦克端通过所述取电电路连接至所述耳机的信号处理电路，所述信号处理电路用于控制所述取电电路生成并向所述耳机插入的终端设备发送第三信号，所述第三信号用于激励所述终端设备增大所述终端设备的供电端的输出电压。
  11. 根据权利要求10所述的控制装置，其特征在于，所述取电电路包括：
    第三开关；
    所述麦克端通过所述第三开关连接至地。
  12. 根据权利要求1至11中任一项所述的控制装置，其特征在于，所述控制装置还包括：
    第二电压检测控制电路；
    所述耳机的麦克端通过所述第二电压检测控制电路连接至所述耳机的信号处理电路的输入端，所述第二电压检测控制电路用于生成并向所述信号处理电路发送第四信号，所述第四信号用于表示所述麦克端的电压状况。
  13. 根据权利要求12所述的控制装置，其特征在于，所述第二电压检测控制电路包括：
    第十三电阻和第十四电阻；
    所述耳机的麦克端通过所述第十三电阻连接至所述第十四电阻的一端， 所述耳机的麦克端通过所述第十三电阻连接至所述信号处理电路，所述第十四电阻的另一端接地。
  14. 根据权利要求1至13中任一项所述的控制装置，其特征在于，所述控制装置还包括：
    第四开关；
    所述耳机的储能电路通过第四开关连接至所述耳机的生物特征检测模块，所述耳机的信号处理电路用于控制所述第四开关的导通或关断。
  15. 根据权利要求14所述的控制装置，其特征在于，所述控制装置还包括：
    第二低压差线性稳压器LDO；
    所述储能电路与第二LDO的一端相连，所述第二LDO的另一端通过第五电容连接至地，所述第二LDO的另一端还通过所述第四开关连接至所述生物特征检测模块。
  16. 根据权利要求15所述的控制装置，其特征在于，所述控制装置还包括：
    第六电容；
    所述第二LDO的另一端通过所述第六电容连接至地。
  17. 一种有线耳机，其特征在于，包括：
    权利要求1至16中任一项所述的控制装置。
  18. 根据权利要求17所述的有线耳机，其特征在于，所述控制装置设置于所述有线耳机的线控板内。
  19. 根据权利要求17或18所述的有线耳机，其特征在于，所述有线耳机还包括：
    生物特征显示模块；
    所述耳机的信号处理电路与所述生物特征显示模块相连，所述生物特征显示模块用于显示所述耳机的生物特征检测模块的检测结果。
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