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WO2014180023A1 - 一种利用电子设备的电源向anc耳机供电的方法及设备 - Google Patents

一种利用电子设备的电源向anc耳机供电的方法及设备 Download PDF

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Publication number
WO2014180023A1
WO2014180023A1 PCT/CN2013/077313 CN2013077313W WO2014180023A1 WO 2014180023 A1 WO2014180023 A1 WO 2014180023A1 CN 2013077313 W CN2013077313 W CN 2013077313W WO 2014180023 A1 WO2014180023 A1 WO 2014180023A1
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WO
WIPO (PCT)
Prior art keywords
earphone
pin
electronic device
module
anc
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2013/077313
Other languages
English (en)
French (fr)
Inventor
黄勳德
何佳汉
李健强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anpac Semiconductor Ltd
Original Assignee
Anpac Semiconductor Ltd
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.)
Filing date
Publication date
Application filed by Anpac Semiconductor Ltd filed Critical Anpac Semiconductor Ltd
Priority to US14/383,519 priority Critical patent/US9615159B2/en
Publication of WO2014180023A1 publication Critical patent/WO2014180023A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/58—Contacts spaced along longitudinal axis of engagement
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1783—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17855—Methods, e.g. algorithms; Devices for improving speed or power requirements
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • 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
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • 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
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • 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
    • H04R1/1025—Accumulators or arrangements for charging
    • 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
    • H04R1/1083—Reduction of ambient noise
    • 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
    • H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
    • 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
    • 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
    • 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
    • H04R1/1016—Earpieces of the intra-aural type
    • 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
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
    • H04R2201/107—Monophonic and stereophonic headphones with microphone for two-way hands free communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/09—Applications of special connectors, e.g. USB, XLR, in loudspeakers, microphones or headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/03—Aspects of the reduction of energy consumption in hearing devices

Definitions

  • the invention relates to a method and a device for supplying power to an ANC earphone by using a power source of an electronic device, and belongs to the field of audio devices.
  • earphones have become an important electronic device accessory in people's daily life.
  • the noisy environment will greatly reduce the accuracy of people using headphones to receive sound information, especially for business people who travel frequently, take planes, crowded subways, commuters, and office workers in central air-conditioned rooms. Therefore, the demand for noise canceling headphones has also increased rapidly.
  • ANC Active Noise Cancellation, the active anti-noise
  • the ANC earphone is a kind of noise canceling earphone.
  • the ANC earphone is provided with a noise canceling circuit for eliminating noise in addition to the existing earphone plug and the audio playing unit.
  • This type of noise cancellation circuit requires a dedicated power supply that typically includes a battery and voltage conversion and regulation circuitry that increases the size, weight, and cost of the headset compared to conventional headphones.
  • the commonly used battery voltage is generally not suitable for directly driving such noise cancellation circuits, so the noise cancellation circuit also needs to include a DC-DC voltage conversion circuit to regulate and stabilize the battery voltage to a range suitable for use in the noise cancellation circuit.
  • the structure of the ANC earphone is complicated, resulting in a large number of parts and being difficult to mass-produce, which again increases the size, weight and cost of the earphone, and is inconvenient for the user to use.
  • a method for directly supplying power to a noise canceling earphone by using a power source of an electronic device that is, setting a power pin in a headphone socket of the electronic device, and setting a power end on the earphone plug of the noise canceling earphone, passing through the earphone socket
  • the power pin cooperates with the power terminal of the earphone plug to supply power to the noise cancellation circuit in the earphone.
  • This method requires changes to the plug and socket structure of the earphone, that is, the 5-pole earphone plug and the socket structure. To achieve the noise reduction function, the 5-pole plug and the 5-pole socket must be used together, even if the noise reduction function is abandoned.
  • the earphone can also be connected to a common electronic device (4-pole earphone socket), which reduces the compatibility of the earphone and the electronic device.
  • An object of the present invention is to provide a method and a device for supplying power to an ANC earphone by using a power source of an electronic device, which can enable the ANC earphone to directly take power from the power source of the electronic device, without separately setting a power source and a power conversion circuit, so that the ANC earphone has
  • the utility model has the advantages of simple structure, convenient carrying, suitable for mass production, and low production cost; and has high compatibility compared with the 5-pole earphone plug and the socket structure.
  • the technical solution of the present invention is a method for supplying power to an ANC earphone by using a power source of an electronic device.
  • a power module of the electronic device In the listening mode, a power module of the electronic device outputs power to a microphone pin on an ANC earphone plug through a microphone pin in the earphone socket.
  • the power cancellation circuit of the ANC earphone is powered by the power source of the electronic device.
  • the power module of the electronic device passes the corresponding sound on the ANC earphone plug through the left channel pin or the right channel pin in the earphone socket.
  • the track pin outputs a power source to supply power to the noise cancellation circuit of the ANC earphone using the power of the electronic device.
  • the electronic device detects whether the earphone is in the ANC mode; when the earphone is in the ANC mode, the power supply of the electronic device is utilized.
  • the earphone's noise cancellation circuit supplies power; when the earphone is in non-ANC mode, the earphone is connected to the electronic device as a normal earphone and works, and no electronic device is required to supply power to the output power.
  • the electronic device detecting whether the earphone is in the ANC mode further includes: the electronic device transmitting an inquiry signal to the ANC earphone, and the ANC earphone adopts the mode (ANC mode or non-ANC mode) The signal is returned to the electronic device to complete the detection of the earphone.
  • the electronic device when the listening mode and the conversation mode of the electronic device are mutually switched, the electronic device sends a reminder signal to the switch module of the ANC earphone, and the ANC earphone returns a signal to the electronic device, and switches. In the same mode as the electronic device.
  • the power supply method in the listening mode includes: the switch module on the electronic device disconnects the microphone end of the audio module on the electronic device and the microphone pin of the earphone socket, and The power module of the electronic device is connected to the microphone pin of the earphone socket; the switch module on the ANC earphone disconnects the microphone pin of the earphone plug from the hands-free microphone circuit of the earphone, and the microphone pin and left channel of the earphone plug are cited.
  • the foot and right channel pins are sequentially connected to the power supply terminal, the left channel terminal, and the right channel terminal of the noise cancellation circuit.
  • the power supply method in the conversation mode includes:
  • the switch module on the electronic device disconnects the power module of the electronic device from the microphone pin of the earphone socket, and disconnects the left channel end of the audio module on the electronic device from the left channel pin of the earphone socket, Connect the power module of the electronic device to the left channel pin of the earphone socket, the right channel end of the audio module on the electronic device is connected to the right channel pin of the earphone socket, and the microphone end of the audio module of the electronic device is connected to the earphone socket Microphone pin; the switch module on the ANC earphone connects the left channel pin of the earphone plug to the power supply end of the noise cancellation circuit, and the right channel pin of the earphone plug is connected to the left channel end and the right sound of the noise cancellation circuit The microphone pin of the earphone plug is connected to the hands-free microphone circuit of the earphone;
  • the switch module on the electronic device disconnects the power module of the electronic device from the microphone pin of the earphone socket, and disconnects the right channel end of the audio module on the electronic device from the right channel pin of the earphone socket, Connect the power module of the electronic device to the right channel pin of the earphone socket.
  • the left channel end of the audio module on the electronic device is connected to the left channel pin of the earphone socket, and the microphone end of the audio module on the electronic device is connected to the earphone socket.
  • the switch module on the ANC earphone connects the right channel pin of the headphone plug to the power end of the noise canceling circuit, and the left channel pin of the headphone plug is connected to the left channel end and the right side of the noise canceling circuit At the end of the line, the microphone pin of the headphone plug is connected to the hands-free microphone circuit of the earphone.
  • another power supply method in the conversation mode includes:
  • the switch module on the electronic device connects the power module of the electronic device to the microphone pin of the earphone socket, and connects the microphone end of the audio module on the electronic device to the left channel pin of the earphone socket; the switch module on the ANC earphone Connect the microphone pin of the headphone plug to the power supply end of the noise cancellation circuit, connect the left channel pin of the headphone plug to the hands-free microphone circuit of the earphone, and connect the right channel pin of the headphone plug to the noise cancellation circuit.
  • Left channel and right channel you can select one channel from the left channel and the right channel of the audio module to connect to the right channel pin of the headphone jack to transmit the left sound from the audio module.
  • Channel signal or right channel signal may be any channel from the left channel and the right channel of the audio module to connect to the right channel pin of the headphone jack to transmit the left sound from the audio module.
  • the switch module on the electronic device connects the power module of the electronic device to the microphone pin of the earphone socket, and connects the microphone end of the audio module on the electronic device to the right channel pin of the earphone socket;
  • the switch module on the ANC earphone Connect the microphone pin of the headphone plug to the power supply end of the noise cancellation circuit, connect the right channel pin of the headphone plug to the hands-free microphone circuit of the earphone, and connect the left channel pin of the headphone plug to the noise cancellation circuit.
  • Left channel and right channel can select one channel from the left channel and the right channel of the audio module to connect to the left channel pin of the headphone jack to transmit the left sound from the audio module Channel signal or right channel signal.
  • the ANC headphones have no external power supply for a moment.
  • the power storage module of the ANC headset obtains power supply charging from the electronic device in normal (ie, listening mode and conversation mode), and continues to supply power to the noise cancellation circuit, the detection and control module, and the switch module in the instant of no external power supply.
  • the electronic device has a dialog function, and the electronic device includes, but is not limited to, any one of a mobile phone, a personal computer, a notebook computer, and a tablet computer.
  • a device for powering an ANC earphone using a power source of an electronic device comprising an ANC earphone and an electronic device;
  • the ANC earphone comprising an earphone plug, an audio playback unit, a noise cancellation circuit, and a hands-free microphone circuit, the earphone plug
  • the ground pin A, the microphone pin A, the left channel pin A, and the right channel pin A are included, and the noise canceling circuit includes a power terminal, a left channel end A, and a right channel end A;
  • the electronic device The utility model comprises an audio module, a power module and a earphone socket, the earphone socket comprises a ground pin B, a microphone pin B, a left channel pin B and a right channel pin B, and the audio module comprises a microphone end and a left channel end B And the right channel end B
  • the ANC earphone further comprises a detection and control module A and a switch module A, the detection and control module A is connected with the earphone plug, the noise elimination circuit and the hands
  • the power module is connected to the microphone pin B through the switch module B, and the left channel end B is connected to the left channel pin B through the switch module B, and the right channel end B is connected to the right channel pin B through the switch module B, the microphone pin A is connected to the power terminal through the switch module A, and the left channel pin A is connected to the left channel end A through the switch module A, the right channel pin A is connected to the right channel end A through the switch module A.
  • the power module is connected to the left channel pin B through the switch module B, the microphone terminal is connected to the microphone pin B through the switch module B, and the right channel end B is connected through the switch.
  • Module B is connected to the right channel pin B, the microphone pin A is connected to the hands-free microphone circuit through the switch module A, the left channel pin A is connected to the power terminal through the switch module A, and the right channel pin A is passed through the switch module.
  • A is connected to the left channel end A and the right channel end A, respectively.
  • the power module is connected to the right channel pin B through the switch module B, the microphone terminal is connected to the microphone pin B through the switch module B, and the left channel end B is passed through the switch.
  • Module B is connected to the left channel pin B, the microphone pin A is connected to the hands-free microphone circuit through the switch module A, and the left channel pin A is connected to the left channel end A and the right channel end A through the switch module A, respectively.
  • the right channel pin A is connected to the power terminal through the switch module A.
  • the power module is connected to the microphone pin B through the switch module B, the microphone terminal is connected to the left channel pin B through the switch module B, and the microphone pin A is passed through the switch module.
  • A is connected to the power terminal, the left channel pin A is connected to the hands-free microphone circuit through the switch module A, and the right channel pin A is connected to the left channel end A and the right channel end A through the switch module A, respectively.
  • a channel end connected to the right channel pin B of the headphone jack may be selected from the left channel end B and the right channel end B of the audio module for transmitting the left channel signal or the right channel signal from the audio module. .
  • the power module is connected to the microphone pin B through the switch module B, the microphone terminal is connected to the right channel pin B through the switch module B, and the microphone pin A is passed through the switch module.
  • A is connected to the power terminal, the right channel pin A is connected to the hands-free microphone circuit through the switch module A, and the left channel pin A is connected to the left channel end A and the right channel end A through the switch module A, respectively.
  • a channel end connected to the left channel pin B of the headphone jack may be selected from the left channel end B and the right channel end B of the audio module for transmitting the left channel signal or the right channel signal from the audio module. .
  • the microphone end is connected to the microphone pin B through the switch module B, and the left channel end B is connected to the left channel pin B through the switch module B, and the right channel end B is connected to the right channel pin B through the switch module B, and the microphone pin A is connected to the hands-free microphone circuit through the switch module A, and the left channel pin A and the right channel pin A are both played through the switch module A and the audio. Unit connection.
  • the detection and control module A is connected to the microphone pin A, the left channel pin A or the right channel pin A of the earphone plug.
  • the detection and control module B is connected to the microphone pin B, the left channel pin B or the right channel pin B of the earphone jack.
  • the ANC earphone includes a power storage module, and the power storage module is respectively connected to the power terminal, the detection and control module A and the switch module A.
  • the noise canceling circuit, the detecting and controlling module A and the switch module A are integrated on the same chip.
  • the noise canceling circuit for supplying power to the ANC earphone by using the power source of the electronic device, the noise canceling circuit, the detecting and controlling module A, the switch module A and the electric energy storage module are integrated on the same chip.
  • the detection and control module B and the switch module B are integrated on the same chip.
  • the earphone plug includes a plug body and a base connected to the plug body, and at least one of a noise eliminating circuit, a detecting and controlling module A, a switch module A, and an electric energy storage module One is installed in the base.
  • At least one of the noise canceling circuit, the detecting and controlling module A, the switch module A and the electric energy storage module is in the audio playing unit.
  • the ANC earphone further includes a connection between the earphone plug and the audio playing unit, and is used for controlling a switch state and a broadcast volume of the audio playing unit. And the control unit for the sound quality.
  • At least one of the noise eliminating circuit, the detecting and controlling module A, the switch module A and the electric energy storage module is installed in the control unit.
  • At least one of the noise eliminating circuit, the detecting and controlling module A, the switch module A and the electric energy storage module is connected between the earphone plug and the control unit, Or at least one of them is connected between the control unit and the audio playback unit.
  • the ANC earphone further includes a manual switch or an electric switch for turning on or off an ANC mode of the ANC earphone, and the manual switch or the electric switch may be disposed at the On the control unit.
  • control device for supplying power to the ANC earphone by using the power source of the electronic device, is hardware, a software module or firmware, and the control device is further configured to set and adjust an operating parameter of the ANC earphone.
  • the detection and control module B and the switch module B can be simplified as a manual hardware switch or a human-machine interface switch for opening or Turn off the listening mode, dialogue mode, and ANC mode of the electronic device.
  • the present invention utilizes the left channel pin, the right channel pin or the microphone pin of the earphone socket to connect the power module of the electronic device, so that the ANC earphone can directly take power from the power source of the electronic device,
  • the battery and DC-DC voltage conversion circuit and voltage regulator circuit in the ANC earphone control unit are removed, and the control unit structure is simplified, which has a smaller external size, reduces weight and cost, is convenient to carry, and is suitable for mass production.
  • the present invention utilizes the left and right channels of the earphone socket of the electronic device to supply power to the ANC earphone instead of using the microphone pin as follows:
  • the current consumed by the earphone circuit is 0-0.2 mA
  • the voltage drop across the 2k ohm resistor is 0-0.4V.
  • This voltage drop of 0.4V is 13% of the bias voltage 3V provided by the mobile phone microphone circuit. If this voltage drop is stable, it may not affect the microphone's signal. However, this voltage drop is a function of the current consumed by the headphone circuitry. The current consumed by the headphone circuit is not stable, and its change produces an AC voltage signal (noise) on the microphone pin that interferes with the microphone signal transmitted from the headset to the handset. If the headphone circuit consumes more than 0.2 mA, another problem arises: after the 2k ohm resistor, the headphone gets a low supply voltage that is not suitable for driving the headphone circuit.
  • the present invention also introduces another power supply method in the conversation mode, that is, the way of supplying power through the microphone pin in the listening mode is still adopted, and the left sound is selected.
  • the channel or right channel transmits the hands-free microphone signal, and the audio signal from the audio module is output to the left and right channel ends of the noise cancellation circuit through the remaining channels. Since the listening mode and the conversation mode are powered in the same way, when there is no mode switching, the ANC earphone has no power supply instantaneously, and the power storage module is not needed, which simplifies the hardware structure of the ANC earphone, simplifies the manufacturing process, and saves the operation. cost.
  • the present invention Since the present invention does not change the conventional structure of the 4-pole earphone socket and the plug, and only improves the electronic device circuit and the earphone circuit, the present invention has the following compatibility benefits: 1.
  • the ANC earphone of the present invention When the ANC earphone of the present invention is connected to the electronic device of the present invention, the ANC earphone implements the ANC function;
  • the ANC earphone of the present invention When the ANC earphone of the present invention is connected to a general electronic device (not according to the invention), the ANC earphone can be used as a general earphone application;
  • the electronic device of the present invention When the electronic device of the present invention is connected to a general earphone (not according to the present invention), the electronic device of the present invention can be applied as a general electronic device.
  • the invention integrates the noise elimination circuit, the detection and control module A, the switch module A and the electric energy storage module into one chip through integrated circuit technology, and is installed inside the audio playing unit, inside the control unit, or inside the base of the earphone plug, further Simplifies the structure of the ANC headset.
  • FIG. 1 is a flow chart showing the operation of powering an electronic device to an ANC headset according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic diagram of a connection relationship between an ANC earphone and an electronic device in a detection mode according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram showing the connection relationship between the ANC earphone and the electronic device in the listening mode according to Embodiment 1 of the present invention (the switch module A, the switch module B, and the control device are omitted);
  • FIG. 4 is a schematic diagram showing the connection relationship between the ANC earphone and the electronic device in the conversation mode according to the embodiment 1 of the present invention (the switch module A, the switch module B, and the control device are omitted);
  • FIG. 5 is a schematic diagram of a connection relationship between an ANC earphone and an electronic device in a conversation mode according to Embodiment 2 of the present invention (the switch module A, the switch module B, and the control device are omitted);
  • FIG. 6 is a schematic diagram showing the connection relationship between the ANC earphone and the electronic device in the normal mode (non-ANC mode) according to Embodiment 1 of the present invention (only the earphone plug, the earphone socket, the audio playing unit, the hands-free microphone circuit, and the audio module are reserved) ;
  • FIG. 8 is a flow chart showing the operation of the electronic device according to Embodiment 3 of the present invention to supply power to the ANC headset;
  • FIG. 9 is a schematic diagram showing a connection relationship between an ANC headset and an electronic device in a conversation mode according to Embodiment 3 of the present invention.
  • FIG. 10 is a schematic diagram showing the connection relationship between the ANC earphone and the ordinary audio device according to the present invention (only the earphone plug, the earphone socket, the audio playing unit, the hands-free microphone circuit and the audio module are reserved);
  • Figure 12 is a schematic view of an ANC earphone plug
  • FIG. 13 is a flow chart showing the operation of the electronic device according to Embodiments 9 and 10 of the present invention for supplying power to the ANC earphone;
  • FIG. 14 is a schematic diagram showing the connection relationship between the ANC earphone and the electronic device in the conversation mode according to Embodiment 9 of the present invention (the switch module A, the switch module B, and the control device are omitted);
  • FIG. 15 is a schematic diagram showing the connection relationship between the ANC earphone and the electronic device in the conversation mode according to the tenth embodiment of the present invention (the switch module A, the switch module B, and the control device are omitted).
  • Embodiment 1 of the present invention A method for supplying power to an ANC earphone by using a power source of an electronic device, the working flow chart of which is shown in FIG. 1.
  • the electronic device and the ANC earphone enter the detection mode. That is, the electronic device detects whether the earphone is in the ANC mode; the detection and control module tests the characteristics of the earphone plug to determine whether it is an ANC earphone or a normal earphone.
  • the detection method can be as follows:
  • the earphone Detecting the electrical characteristics (such as impedance, capacitance, inductance, and signal) of the microphone pin, left channel pin, or right channel pin of the earphone plug. If the detected data is an electrical characteristic of the ANC earphone, the earphone is in the ANC mode; If the detected data is an electrical characteristic of a normal earphone, the earphone is in the normal mode, that is, the non-ANC mode.
  • the electrical characteristics such as impedance, capacitance, inductance, and signal
  • the headset When the ANC headset is in the normal mode (non-ANC mode), the headset is connected to the electronic device as a normal earphone and operates, and no electronic device is required to supply power to the output power.
  • the power supply of the electronic device is powered by the power supply of the electronic device, and the electronic device and the ANC earphone enter the listening mode.
  • the switch module on the electronic device disconnects the power module of the electronic device from the microphone pin of the earphone socket, and disconnects the left channel end of the audio module on the electronic device from the left channel pin of the earphone socket.
  • the microphone pin of the socket; the switch module on the ANC earphone connects the left channel pin of the earphone plug to the power terminal of the noise cancellation circuit, and the right channel pin of the earphone plug is connected to the left channel end and the right of the noise cancellation circuit
  • the microphone pin of the headphone plug is connected to the hands-free microphone circuit of the earphone.
  • the hands-free microphone circuit In the dialogue mode, the hands-free microphone circuit is normally connected and working, and the left channel is required to be used as the power output channel of the electronic device.
  • the audio signal of the left channel of the electronic device is not transmitted to the earphone, and the audio signal of the right channel is From the right channel to the left and right channel ends of the noise cancellation circuit of the earphone, the user hears the signal of the right channel from the left and right speakers.
  • the electronic device When the conversation ends, the electronic device enters the listening mode and sends a reminder signal to the ANC headset, which returns a signal to the electronic device and switches to the listening mode.
  • the ANC earphone When the listening mode of the ANC earphone is switched to the dialogue mode, that is, when the power end of the noise canceling circuit is switched between the microphone pin of the earphone plug and the left channel pin, the ANC earphone has no external power supply for a moment.
  • the power storage module of the ANC earphone takes power supply from the electronic device in normal (ie, listening mode and dialogue mode), and can continue to provide power to the noise cancellation circuit, detection and control module and switch in the moment when there is no external power supply. Module.
  • the ANC earphone 1 includes an earphone plug 3, an audio playback unit 4, a noise cancellation circuit 5, a hands-free microphone circuit 6, a detection and control module A24, a switch module A25 and an electrical energy storage module 28, an electrical energy storage module 28 and a power supply terminal 11,
  • the detection and control module A24 and the switch module A25 are both connected, the audio playback unit 4 is connected to the noise cancellation circuit 5, and the hands-free microphone circuit 6 is connected to the switch module A25.
  • the earphone plug 3 includes a ground pin A7 and a microphone pin A8.
  • the left channel pin A9 and the right channel pin A10, the noise canceling circuit 5 includes a power terminal 11, a left channel end A12 and a right channel end A13, and the power terminal 11 is connected to the microphone pin A8 through the switch module A25.
  • the left channel end A12 is connected to the left channel pin A9 through the switch module A25
  • the right channel end A13 is connected to the right channel pin A10 through the switch module A25, the detection and control module A24 and the microphone pin A8, left sound Channel pin A9 or right channel pin A10 is connected.
  • the electronic device 2 includes an audio module 14, a power module 15, a headphone jack 16, a detection and control module B26, and a switch module B27.
  • the power module 15 is connected to the switch module B27.
  • the headphone jack 16 includes a ground pin B17 and a microphone lead.
  • the foot module B18, the left channel pin B19 and the right channel pin B20, the audio module 14 includes a microphone end 21, a left channel end B22 and a right channel end B23, and the microphone pin B18 is connected to the microphone end 21 through the switch module B27.
  • the left channel pin B19 is connected to the left channel end B22 through the switch module B27
  • the right channel pin B20 is connected to the right channel end B23 through the switch module B27, and the detection and control module B26 and the microphone pin B18, left sound
  • the channel pin B19 or the right channel pin B20 is connected.
  • the ANC earphone 1 further includes a control connected between the earphone plug 3 and the audio playing unit 4 for controlling the switching state, the broadcasting volume and the sound quality of the audio playing unit 4.
  • Unit 31 the control connected between the earphone plug 3 and the audio playing unit 4 for controlling the switching state, the broadcasting volume and the sound quality of the audio playing unit 4.
  • the noise cancellation circuit 5, the detection and control module A24, the switch module A25 and the electrical energy storage module 28 can be integrated on the same chip, and the chip is mounted in the control unit 31.
  • the electronic device 2 further includes a control device 32 for controlling the opening or closing of the power module 15 and the detection and control module B26 and the switch module B27.
  • the control device 32 is hardware, software module or firmware, and the control device 32 is also used to set and adjust the operating parameters of the ANC earphone 1.
  • the detecting and controlling module B26 detects the corresponding microphone pin A8 through the microphone pin B18, the left channel pin B19 or the right channel pin B20,
  • the electrical characteristics (such as impedance, capacitance, inductance, and signal) of the left channel pin A9 or the right channel pin A10 determine whether the ANC earphone 1 is operating in the ANC mode. If it works in normal mode (non-ANC mode), its connection relationship is shown in Figure 6.
  • the initial mode of the electronic device 2 defaults to the listening mode.
  • the detection and control module B26 sends a reminder signal to the detection and control module A24.
  • the detection and control module A24 returns a signal to the detection and control module B26, and the ANC earphone 1 also enters the listening mode.
  • the switch module B27 (not shown) disconnects the microphone end 21 from the microphone pin B18, and connects the power module 15 to the microphone pin B18, thereby implementing power supply to the noise canceling circuit 5, and the power storage module 28 stores energy in real time.
  • the schematic diagram of the connection mode of the conversation mode is as shown in FIG. 4.
  • the electronic device 2 receives or issues a dialog request, the electronic device 2 enters the conversation mode, and the switch module B27 (not shown) disconnects the power module 15 and the microphone pin.
  • the connection of B18 disconnects the left channel end B22 of the audio module 14 on the electronic device 2 from the left channel pin B19 of the headphone jack 16, and connects the power module 15 to the left channel pin B19, the audio module 14
  • the right channel end B23 is connected to the right channel pin B20 of the headphone jack 16, and the microphone end 21 of the audio module 14 is connected to the microphone pin B18 of the headphone jack 16.
  • the detection and control module B26 sends a warning signal to the detection and control module A24.
  • the detection and control module A24 returns a signal to the detection and control module B26, and the ANC earphone 1 also enters the conversation mode.
  • the switch module A25 (not shown) connects the left channel pin A9 of the earphone plug 3 to the power terminal 11 of the noise canceling circuit 5, and the right channel pin A10 of the headphone plug 3 is connected to the left of the noise canceling circuit 5.
  • the channel end A12 and the right channel end A13, the microphone pin A8 of the headphone plug 3 are connected to the hands-free microphone circuit 6.
  • Embodiment 2 of the present invention differs only in that, in the conversation mode, power is supplied to the ANC earphone 1 by the right channel pin B20 of the earphone jack 16 on the electronic device 2. As shown in FIG. 5 and FIG. 7, when the electronic device 2 receives or issues a dialog request, the electronic device 2 enters a conversation mode, and the switch module B27 (not shown) disconnects the power module 15 from the microphone pin B18.
  • the detection and control module B26 sends a warning signal to the detection and control module A24.
  • the detection and control module A24 returns a signal to the detection and control module B26, and the ANC earphone 1 also enters the conversation mode.
  • the switch module A25 (not shown) connects the right channel pin A10 of the headphone plug 3 to the power terminal 11 of the noise canceling circuit 5, and the left channel pin A9 of the headphone plug 3 is connected to the left of the noise canceling circuit 5.
  • the channel end A12 and the right channel end A13, the microphone pin A8 of the headphone plug 3 are connected to the hands-free microphone circuit 6.
  • Embodiment 3 of the present invention The difference between this embodiment and Embodiment 1 is only that the electronic device 2 only operates the noise cancellation circuit 5 of the ANC earphone 1 in the listening mode, the detection and control module A24, the switch module A25, and the electrical energy storage.
  • the module 28 is powered, and the power supply method and device in the listening mode are the same as in the first embodiment; while in the dialog mode, the electronic device 2 does not provide power to the ANC earphone 1, and the ANC earphone 1 serves as a dialogue application for the ordinary earphone, and has no ANC function. .
  • the power supply flow chart is shown in Figure 8.
  • the electronic device 2 When the electronic device 2 receives or issues a dialog request, the electronic device 2 enters the conversation mode and sends a reminder signal to the ANC headset 1, and the ANC headset 1 returns a signal to the electronic device 2 and switches to the conversation mode.
  • the switch module B27 on the electronic device 2 disconnects the power module 15 of the electronic device 2 from the microphone pin B18 of the earphone jack 16, and the microphone end of the audio module 14 on the electronic device 2 21 is connected to the microphone pin B18 of the headphone jack 16, the left channel end B22 is linked to the left channel pin B19, the right channel end B23 is connected to the right channel pin B20; the switch module A25 on the ANC earphone 1 is disconnected
  • the power supply terminal 11 of the noise cancellation circuit 5 is connected to the microphone pin A8 of the earphone plug 3, and the left channel pin A9 of the earphone plug 3 is connected to the left channel end of the audio playback unit 4, and the right channel pin A10 is connected.
  • the microphone pin A8 of the headphone plug 3 is connected to the hands-free microphone circuit 6.
  • the electronic device 2 When the ANC earphone 1 is in the conversation mode, the electronic device 2 does not supply power to the ANC earphone, and the ANC earphone 1 has no external power supply, and the power storage module 28 continues to supply power to the detection and control module A24 and the switch module A25.
  • the power storage module 28 of the ANC headset 1 takes power from the electronic device during normal (ie, listening mode) charging.
  • the electronic device 2 When the conversation ends, the electronic device 2 enters the listening mode and sends a reminder signal to the ANC earphone 1, which returns a signal to the electronic device 2 and switches to the listening mode.
  • Embodiment 4 of the present invention The difference between this embodiment and Embodiment 1 is that, as shown in FIG. 12, the earphone plug 3 includes a plug body 29 and a base 30 connected to the plug body 29, and the noise eliminating circuit 5 detects At least one of the control module A24, the switch module A25 and the electrical energy storage module 28 is mounted in the base 30.
  • Embodiment 5 of the present invention Compared with Embodiment 2, the difference between the present embodiment is that at least one of the noise cancellation circuit 5, the detection and control module A24, the switch module A25, and the power storage module 28 is installed in the audio. In the playback unit 4.
  • Embodiment 7 of the present invention is different from Embodiment 1 only in that at least one of the noise cancellation circuit 5, the detection and control module A24, the switch module A25, and the electrical energy storage module 28 is installed in the control. In unit 31.
  • Embodiment 9 of the present invention as shown in FIG. 13, the detection method in the detection mode and the power supply method in the listening mode are the same as in Embodiment 1; but in the conversation mode, the switch on the electronic device
  • the module connects the power module of the electronic device to the microphone pin of the earphone socket, connects the microphone end of the audio module on the electronic device to the left channel pin of the earphone socket;
  • the switch module on the ANC earphone connects the microphone pin of the earphone plug To the power supply end of the noise cancellation circuit, connect the left channel pin of the earphone plug to the hands-free microphone circuit of the earphone, and connect the right channel pin of the earphone plug to the left and right channels of the noise cancellation circuit.
  • the right channel pin can be selected from the left channel end and the right channel end of the audio module and connected to the right channel pin of the earphone socket for transmitting the left channel signal or the right channel signal from the audio module.
  • the way to supply power through the microphone pin in the listening mode is still adopted, that is, the microphone channel is continuously occupied as the power output channel of the electronic device, and the left channel is transmitted to transmit the hands-free microphone signal, so that the hands-free microphone circuit is normal. Connect and work. If the left channel end of the audio module is connected to the right channel pin of the headphone jack, the audio signal of the left channel is transmitted from the right channel to the left channel end and the right channel end of the noise canceling circuit, and the user is left and right. The left channel signal is heard in both speakers; if the right channel end of the audio module is connected to the right channel pin of the headphone jack, the audio signal of the right channel is transmitted from the right channel to the noise cancellation. The left channel and the right channel of the circuit, the user hears the signals of the right channel from the left and right speakers.
  • the electronic device When the conversation ends, the electronic device enters the listening mode and sends a reminder signal to the ANC headset, which returns a signal to the electronic device and switches to the listening mode.
  • the ANC earphone Since the listening mode and the conversation mode are powered in the same way, when there is no mode switching, the ANC earphone has no power supply instantaneously, and the ANC earphone does not need to store power in real time.
  • the device for implementing the foregoing method and its working principle are similar to those of Embodiment 1, except that the power storage module 28 portion is lacking.
  • the connection relationship diagram in the dialog mode is as shown in FIG. 14.
  • the power module 15 is connected to the microphone pin B18 through the switch module B27, and the microphone terminal 21 is connected to the left channel pin B19 through the switch module B27 (not shown).
  • the right channel end B23 is connected to the right channel pin B20 through the switch module B27 (the left channel end B22 can also be connected to the right channel pin B20), and the microphone pin A8 is passed through the switch module A25 (not shown in the figure)
  • the left channel pin A9 is connected to the hands-free microphone circuit 6 through the switch module A25
  • the right channel pin A10 is connected to the left channel end A12 and the right channel end A13 through the switch module A25, respectively.
  • the mounting positions of the noise canceling circuit 5, the detecting and controlling module A24, and the switch module A25 may be any of the embodiments 4-7.
  • Embodiment 10 of the present invention Compared with Embodiment 9, the difference between the present embodiment and the embodiment 9 is that the right channel is used instead of the microphone pin to transmit the microphone signal, and a connection relationship diagram is shown in FIG. 15 .
  • the ANC earphone 1 further includes a manual switch or an electric switch for turning on or off the ANC mode of the ANC earphone 1, and the manual switch or the electric switch is disposed on the control unit 31;
  • the electronic device 2, the detection and control module and the switch module in the ANC earphone 1 can be realized by electronic circuit technology.
  • the electronic device 2 detects whether the ANC earphone 1 is in the ANC mode or the following manner: the detection and control module B26 detects and controls the module A. 24 sends an inquiry signal, the detection and control module A24 will The mode in which the ANC earphone 1 is located (ANC mode or non-ANC mode) is signaled back to the detection and control module B26, and the detection of the earphone is completed by handshake.
  • the detection and control module B26 detects and controls the module A. 24 sends an inquiry signal
  • the detection and control module A24 will The mode in which the ANC earphone 1 is located (ANC mode or non-ANC mode) is signaled back to the detection and control module B26, and the detection of the earphone is completed by handshake.
  • the detection and control module A24 connected to the microphone pin A8 A power supply is also obtained to complete the signal exchange with the detection and control module B26.
  • the earphone socket has no microphone pin and cannot supply power to the ANC earphone 1 , and the ANC earphone 1 and
  • the connection relationship between the electronic devices 2 is as shown in FIG.
  • the 4-pole earphone plug of the ANC earphone 1 of the present invention can be matched with the 3-pole earphone socket of the ordinary audio device, and the listening function of the ordinary earphone is completed.

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Abstract

本发明公开了一种利用电子设备的电源向ANC耳机供电的方法及设备，该供电方法是通过电子设备的耳机插座内的麦克风引脚、左声道引脚或右声道引脚向ANC耳机的噪声消除电路及其相关电路供电。所述供电设备包括ANC耳机和电子设备，ANC耳机包括检测及控制模块A和开关模块A，检测及控制模块A与耳机插头连接，噪声消除电路、免提麦克风电路均通过开关模块A与耳机插头连接；电子设备包括检测及控制模块B和开关模块B，检测及控制模块B与耳机插座连接，音频模块、电源模块均通过开关模块B与耳机插座连接。本发明能使ANC耳机直接从电子设备的电源取电，使该耳机具有结构简单，便于携带，适于大规模生产，生产成本低且兼容性高的优点。

Description

一种利用电子设备的电源向ANC耳机供电的方法及设备 技术领域
本发明涉及一种利用电子设备的电源向ANC耳机供电的方法及设备，属于音频设备领域。
背景技术
随着各类智能电子设备的出现与普及，耳机已经成为人们日常生活中相当重要的电子设备配件。但是嘈杂的环境会大大降低人们利用耳机接收声音信息的准确性，特别是对于经常出差、乘坐飞机的商务人士，挤地铁、公交的上班族，以及中央空调室内的办公室一族。因此，降噪耳机的需求也迅速增长。
ANC（Active Noise Cancellation，主动抗噪）耳机作为降噪耳机的一种，不同于普通耳机，ANC耳机在现有的耳机插头和音频播放单元之外，还设置有用于消除噪声的噪声消除电路。这类噪声消除电路需要使用专门的电源进行供电，该电源通常包含电池和电压转换与稳压电路，使耳机的外形尺寸、重量和成本与普通耳机相比均有所增加。此外，常用的电池电压一般不适合直接驱动这类噪声消除电路，因此噪声消除电路还需要包含一个DC-DC电压转换电路来调节和稳定电池电压，使其达到适合噪声消除电路使用的范围，这就使得ANC耳机的结构复杂化，导致零部件数量较多、不易大规模生产，再次增加了耳机的外形尺寸、重量和成本，并且不便于用户使用携带等。
现有技术中，有一种直接利用电子设备的电源向降噪耳机供电的方法，即在电子设备的耳机插座内设置电源接脚，在降噪耳机的耳机插头上设置电源端，通过耳机插座内电源接脚与耳机插头上电源端的配合，来向耳机内的噪声消除电路供电。此种方法需要对耳机的插头及插座结构进行改变，即5极的耳机插头及插座结构，要想实现降噪功能，必须配套使用所述5极插头与5极插座，即使放弃降噪功能，所述耳机也不能与普通电子设备(4极耳机插座)连接使用，降低了耳机、电子设备的兼容性。
发明内容
本发明的目的在于，提供一种利用电子设备的电源向ANC耳机供电的方法及设备，它能够使ANC耳机直接从电子设备的电源取电，无需单独设置电源和电源转换电路，使ANC耳机具有结构简单，便于携带，适于大规模生产，且生产成本低的优点；与5极耳机插头及插座结构相比，具有高兼容性的特点。
本发明的技术方案：一种利用电子设备的电源向ANC耳机供电的方法，在收听模式下，电子设备的电源模块通过耳机插座内的麦克风引脚向ANC耳机插头上的麦克风引脚输出电源，以利用所述电子设备的电源向ANC耳机的噪声消除电路供电。
前述的利用电子设备的电源向ANC耳机供电的方法中，在对话模式下，电子设备的电源模块通过耳机插座内的左声道引脚或右声道引脚向ANC耳机插头上的对应的声道引脚输出电源，以利用所述电子设备的电源向ANC耳机的噪声消除电路供电。
前述的利用电子设备的电源向ANC耳机供电的方法中，对话模式下，电子设备的电源模块通过耳机插座内的麦克风引脚向ANC耳机插头上的麦克风引脚输出电源，以利用所述电子设备的电源向ANC耳机的噪声消除电路供电；而ANC耳机发出的免提麦克风信号则通过电子设备的耳机插座内的左声道引脚或右声道引脚来接收。
前述的利用电子设备的电源向ANC耳机供电的方法中，当耳机插头插入电子设备的耳机插座时，电子设备检测该耳机是否处于ANC模式；当耳机处于ANC模式时，才利用电子设备的电源向该耳机的噪声消除电路供电；当耳机处于非ANC模式时，该耳机作为一个普通耳机与电子设备连接并工作，无需电子设备向其输出电源进行供电。
前述的利用电子设备的电源向ANC耳机供电的方法中，电子设备检测耳机是否处于ANC模式包括：检测耳机插头的麦克风引脚、左声道引脚或右声道引脚的电气特性（例如阻抗、电容、电感、信号），若检测数据是ANC耳机的电气特性，则该耳机处于ANC模式；若检测数据是普通耳机的电气特性，则该耳机处于普通模式，即非ANC模式。
前述的利用电子设备的电源向ANC耳机供电的方法中，电子设备检测耳机是否处于ANC模式还包括：电子设备向ANC耳机发送询问信号，ANC耳机将所处模式（ANC模式或者非ANC模式）以信号返回给电子设备，完成对耳机的检测。
前述的利用电子设备的电源向ANC耳机供电的方法中，电子设备的收听模式与对话模式相互切换时，电子设备会发出提醒信号到ANC耳机的开关模块，ANC耳机向电子设备返回信号，并切换到与电子设备相同的模式下。
前述的利用电子设备的电源向ANC耳机供电的方法中，收听模式下的供电方法包括：电子设备上的开关模块断开电子设备上音频模块的麦克风端与耳机插座的麦克风引脚的连接，将电子设备的电源模块连接到耳机插座的麦克风引脚；ANC耳机上的开关模块断开耳机插头的麦克风引脚与耳机的免提麦克风电路的连接，将耳机插头的麦克风引脚、左声道引脚和右声道引脚依次连接到噪声消除电路的电源端、左声道端和右声道端。
前述的利用电子设备的电源向ANC耳机供电的方法中，对话模式下的供电方法包括：
（1）电子设备上的开关模块断开电子设备的电源模块与耳机插座的麦克风引脚的连接，断开电子设备上音频模块的左声道端与耳机插座的左声道引脚的连接，将电子设备的电源模块连接到耳机插座的左声道引脚，电子设备上音频模块的右声道端连接到耳机插座的右声道引脚，电子设备上音频模块的麦克风端连接到耳机插座的麦克风引脚；ANC耳机上的开关模块将耳机插头的左声道引脚连接到噪声消除电路的电源端，耳机插头的右声道引脚连接到噪声消除电路的左声道端和右声道端，耳机插头的麦克风引脚连接到耳机的免提麦克风电路；
（2）电子设备上的开关模块断开电子设备的电源模块与耳机插座的麦克风引脚的连接，断开电子设备上音频模块的右声道端与耳机插座的右声道引脚的连接，将电子设备的电源模块连接到耳机插座的右声道引脚，电子设备上音频模块的左声道端连接到耳机插座的左声道引脚，电子设备上音频模块的麦克风端连接到耳机插座的麦克风引脚；ANC耳机上的开关模块将耳机插头的右声道引脚连接到噪声消除电路的电源端，耳机插头的左声道引脚连接到噪声消除电路的左声道端和右声道端，耳机插头的麦克风引脚连接到耳机的免提麦克风电路。
前述的利用电子设备的电源向ANC耳机供电的方法中，对话模式下的另外一种供电方法包括：
（1）电子设备上的开关模块将电子设备的电源模块连接到耳机插座的麦克风引脚，将电子设备上音频模块的麦克风端连接到耳机插座的左声道引脚；ANC耳机上的开关模块将耳机插头的麦克风引脚连接到噪声消除电路的电源端，将耳机插头的左声道引脚连接到耳机的免提麦克风电路，以及将耳机插头的右声道引脚连接到噪声消除电路的左声道端和右声道端；可以从音频模块的左声道端和右声道端中选择一个声道端连接到耳机插座的右声道引脚，用来传输音频模块发出的左声道信号或右声道信号。
（2）电子设备上的开关模块将电子设备的电源模块连接到耳机插座的麦克风引脚，将电子设备上音频模块的麦克风端连接到耳机插座的右声道引脚；ANC耳机上的开关模块将耳机插头的麦克风引脚连接到噪声消除电路的电源端，将耳机插头的右声道引脚连接到耳机的免提麦克风电路，以及将耳机插头的左声道引脚连接到噪声消除电路的左声道端和右声道端；可以从音频模块的左声道端和右声道端中选择一个声道端连接到耳机插座的左声道引脚，用来传输音频模块发出的左声道信号或右声道信号。
前述的利用电子设备的电源向ANC耳机供电的方法中，当ANC耳机的收听模式与对话模式相互切换时，即噪声消除电路的电源端在耳机插头的麦克风引脚与左声道引脚或右声道引脚之间转换连接时，ANC耳机在一瞬间没有外来电源。ANC耳机的电能储存模块，在平时(即收听模式和对话模式中)从电子设备取得电源充电，在没有外来电源的一瞬间继续提供电源给噪声消除电路、检测及控制模块和开关模块。
前述的利用电子设备的电源向ANC耳机供电的方法中，所述电子设备具有对话功能，所述电子设备包括但不限于手机、个人电脑、笔记本电脑、平板电脑中的任意一种。
实现前述方法的一种利用电子设备的电源向ANC耳机供电的设备，包括ANC耳机和电子设备；所述ANC耳机包括耳机插头、音频播放单元、噪声消除电路和免提麦克风电路，所述耳机插头包括接地引脚A、麦克风引脚A、左声道引脚A和右声道引脚A，所述噪声消除电路包括电源端、左声道端A和右声道端A；所述电子设备包括音频模块、电源模块和耳机插座，所述耳机插座包括接地引脚B、麦克风引脚B、左声道引脚B及右声道引脚B，音频模块包括麦克风端、左声道端B和右声道端B，ANC耳机还包括检测及控制模块A和开关模块A，检测及控制模块A与耳机插头连接，噪声消除电路、免提麦克风电路均通过开关模块A与耳机插头连接；电子设备还包括检测及控制模块B、开关模块B，检测及控制模块B与耳机插座连接，音频模块、电源模块均通过开关模块B与耳机插座连接。
前述的利用电子设备的电源向ANC耳机供电的设备中，电源模块通过开关模块B与麦克风引脚B连接，左声道端B通过开关模块B与左声道引脚B连接，右声道端B通过开关模块B与右声道引脚B连接，麦克风引脚A通过开关模块A与电源端连接，左声道引脚A通过开关模块A与左声道端A连接，右声道引脚A通过开关模块A与右声道端A连接。
前述的利用电子设备的电源向ANC耳机供电的设备中，电源模块通过开关模块B与左声道引脚B连接，麦克风端通过开关模块B与麦克风引脚B连接，右声道端B通过开关模块B与右声道引脚B连接，麦克风引脚A通过开关模块A与免提麦克风电路连接，左声道引脚A通过开关模块A与电源端连接，右声道引脚A通过开关模块A分别与左声道端A、右声道端A连接。
前述的利用电子设备的电源向ANC耳机供电的设备中，电源模块通过开关模块B与右声道引脚B连接，麦克风端通过开关模块B与麦克风引脚B连接，左声道端B通过开关模块B与左声道引脚B连接，麦克风引脚A通过开关模块A与免提麦克风电路连接，左声道引脚A通过开关模块A分别与左声道端A、右声道端A连接，右声道引脚A通过开关模块A与电源端连接。
前述的利用电子设备的电源向ANC耳机供电的设备中，电源模块通过开关模块B与麦克风引脚B连接，麦克风端通过开关模块B与左声道引脚B连接，麦克风引脚A通过开关模块A与电源端连接，左声道引脚A通过开关模块A与免提麦克风电路连接，右声道引脚A通过开关模块A分别与左声道端A和右声道端A连接。可以从音频模块的左声道端B和右声道端B中选择一个声道端连接到耳机插座的右声道引脚B，用来传输音频模块发出的左声道信号或右声道信号。
前述的利用电子设备的电源向ANC耳机供电的设备中，电源模块通过开关模块B与麦克风引脚B连接，麦克风端通过开关模块B与右声道引脚B连接，麦克风引脚A通过开关模块A与电源端连接，右声道引脚A通过开关模块A与免提麦克风电路连接，左声道引脚A通过开关模块A分别与左声道端A和右声道端A连接。可以从音频模块的左声道端B和右声道端B中选择一个声道端连接到耳机插座的左声道引脚B，用来传输音频模块发出的左声道信号或右声道信号。
前述的利用电子设备的电源向ANC耳机供电的设备中，麦克风端通过开关模块B与麦克风引脚B连接，左声道端B通过开关模块B与左声道引脚B连接，右声道端B通过开关模块B与右声道引脚B连接，麦克风引脚A通过开关模块A与免提麦克风电路连接，左声道引脚A、右声道引脚A均通过开关模块A与音频播放单元连接。
前述的利用电子设备的电源向ANC耳机供电的设备中，检测及控制模块A与耳机插头的麦克风引脚A、左声道引脚A或右声道引脚A连接。
前述的利用电子设备的电源向ANC耳机供电的设备中，检测及控制模块B与耳机插座的麦克风引脚B、左声道引脚B或右声道引脚B连接。
前述的利用电子设备的电源向ANC耳机供电的设备中，所述ANC耳机包括电能储存模块，电能储存模块分别与电源端、检测及控制模块A和开关模块A均连接。
前述的利用电子设备的电源向ANC耳机供电的设备中，噪声消除电路、检测及控制模块A和开关模块A集成在同一个芯片上。
前述的利用电子设备的电源向ANC耳机供电的设备中，噪声消除电路、检测及控制模块A、开关模块A和电能储存模块集成在同一个芯片上。
前述的利用电子设备的电源向ANC耳机供电的设备中，检测及控制模块B和开关模块B集成在同一个芯片上。
前述的利用电子设备的电源向ANC耳机供电的设备中，所述耳机插头包括插头本体以及与插头本体连接的底座，噪声消除电路、检测及控制模块A、开关模块A和电能储存模块中至少有一个装设于底座中。
前述的利用电子设备的电源向ANC耳机供电的设备中，噪声消除电路、检测及控制模块A、开关模块A和电能储存模块中至少有一个所述音频播放单元中。
前述的利用电子设备的电源向ANC耳机供电的设备中，所述ANC耳机还包括连接于所述耳机插头与所述音频播放单元之间，用于控制所述音频播放单元的开关状态、播音音量和播音音质的控制单元。
前述的利用电子设备的电源向ANC耳机供电的设备中，噪声消除电路、检测及控制模块A、开关模块A和电能储存模块中至少有一个装设于所述控制单元中。
前述的利用电子设备的电源向ANC耳机供电的设备中，噪声消除电路、检测及控制模块A、开关模块A和电能储存模块中至少有一个连接于所述耳机插头与所述控制单元之间，或其中至少有一个连接于所述控制单元与所述音频播放单元之间。
前述的利用电子设备的电源向ANC耳机供电的设备中，所述ANC耳机还包括手动开关或电动开关，用于打开或关闭ANC耳机的ANC模式，所述手动开关或电动开关可设置在所述控制单元上。
前述的利用电子设备的电源向ANC耳机供电的设备中，如果以手动选择方法代替自动检测方法,检测及控制模块A和开关模块A可简化为手动硬件开关，用于打开或者关闭ANC耳机的收听模式、对话模式。
前述的利用电子设备的电源向ANC耳机供电的设备中，所述电子设备还包括控制装置，用于对电源模块的打开或关闭，及检测及控制模块B、开关模块B进行控制。
前述的利用电子设备的电源向ANC耳机供电的设备中，所述控制装置是硬件、软件模块或固件，且所述控制装置还用于设置及调节ANC耳机的工作参数。
前述的利用电子设备的电源向ANC耳机供电的设备中，如果以手动选择方法代替自动检测方法,检测及控制模块B和开关模块B可简化为手动硬件开关或者人机界面开关，用于打开或者关闭电子设备的收听模式、对话模式和ANC模式。
与现有技术相比，本发明利用耳机插座的左声道引脚、右声道引脚或麦克风引脚来连接电子设备的电源模块，能够使ANC耳机直接从电子设备的电源取电，可以去掉ANC耳机控制单元中的电池和DC-DC电压转换电路与稳压电路，简化控制单元结构，使其具有更小的外形尺寸，减少重量和成本，便于携带，适于大规模生产。
本发明在对话模式下，利用电子设备耳机插座的左、右声道来供应电源给ANC耳机，而不是利用麦克风引脚的原因如下：
以手机为例，手机麦克风电路提供的偏置电压大约是3V，该偏置电压与插座的麦克风引脚之间还有一个大约2k欧姆的电阻。如果利用麦克风引脚，同时为耳机供应电源及接收耳机发出的麦克风信号，会产生以下问题。
假设耳机电路消耗的电流在0～0.2毫安，跨越2k欧姆电阻的电压降是0～0.4V，这个电压降0.4V是手机麦克风电路提供的偏置电压3V的13％。如果这个电压降是稳定的，它可能不会影响麦克风的信号。然而，这个电压降是会跟随耳机电路消耗的电流而改变的。耳机电路消耗的电流不是稳定的，它的改变会产生一个交流电压信号（噪声）在麦克风引脚上，这个噪声会干扰从耳机传送给手机的麦克风信号。如果耳机电路消耗的电流大于0.2毫安，就会产生另一个问题：在2k欧姆电阻后面，耳机得到的电源电压会很低，不适合用来驱动耳机电路。
因此，对话模式下，手机的麦克风引脚不适合用来供应电源给ANC耳机,即麦克风引脚不能同时用来传送麦克风信号和电源；同理可知，对话模式下，其他电子设备的麦克风引脚同样不适合用来供应电源给ANC耳机。
鉴于麦克风引脚不能同时用来传送麦克风信号和电源，本发明还介绍了另一种在对话模式下的供电方法，即：依然采用收听模式下的通过麦克风引脚供电的途径，而选择左声道或右声道来传送免提麦克风信号，音频模块发出的音频信号则通过剩下的声道输出到噪声消除电路的左、右声道端。由于收听模式与对话模式的供电途径是相同的，因此不存在模式切换时，ANC耳机瞬间没有电源的情况，也不需要电能储存模块，简化了ANC耳机的硬件结构，简化了制作工艺，节省了成本。
由于本发明没有改变4极耳机插座及插头的传统结构，只是对电子设备电路以及耳机电路进行改进，因此，本发明有以下兼容的好处：1. 当本发明所述ANC耳机与本发明所述电子设备连接时，ANC耳机实现ANC功能；2. 当本发明的ANC耳机与普通电子设备(非本发明)连接时，ANC耳机可作为普通耳机应用； 3. 当本发明所述电子设备与普通耳机(非本发明)连接时，本发明所述电子设备可作为普通电子设备应用。
本发明将噪声消除电路、检测及控制模块A、开关模块A和电能储存模块通过集成电路技术集成到一片芯片上，装设在音频播放单元内部，控制单元内部，或者耳机插头的底座内部，进一步简化了ANC耳机的结构。
附图说明
图1是本发明实施例1中所述电子设备向ANC耳机供电的工作流程图；
图2是本发明实施例1中所述ANC耳机与电子设备在检测模式下的连接关系示意图；
图3是本发明实施例1中所述ANC耳机与电子设备在收听模式下的连接关系示意图（省略开关模块A、开关模块B、控制装置）；
图4是本发明实施例1中所述ANC耳机与电子设备在对话模式下的连接关系示意图（省略开关模块A、开关模块B、控制装置）；
图5是本发明实施例2中所述ANC耳机与电子设备在对话模式下的连接关系示意图（省略开关模块A、开关模块B、控制装置）；
图6是本发明实施例1中所述ANC耳机与电子设备在普通模式（非ANC模式）下的连接关系示意图（只保留耳机插头、耳机插座、音频播放单元、免提麦克风电路和音频模块）；
图7是本发明实施例2中所述电子设备向ANC耳机供电的工作流程图；
图8是本发明实施例3中所述电子设备向ANC耳机供电的工作流程图；
图9是本发明实施例3中所述ANC耳机与电子设备在对话模式下的连接关系示意图；
图10是本发明所述ANC耳机与普通音频设备的连接关系示意图（只保留耳机插头、耳机插座、音频播放单元、免提麦克风电路和音频模块）；
图11是ANC耳机的示意图；
图12是ANC耳机插头的示意图；
图13是本发明实施例9和10中所述电子设备向ANC耳机供电的工作流程图；
图14是本发明实施例9中所述ANC耳机与电子设备在对话模式下的连接关系示意图（省略开关模块A、开关模块B、控制装置）；
图15是本发明实施例10中所述ANC耳机与电子设备在对话模式下的连接关系示意图（省略开关模块A、开关模块B、控制装置）。
附图中的标记为：1-ANC耳机，2-电子设备，3-耳机插头，4-音频播放单元，5-噪声消除电路，6-免提麦克风电路，7-接地引脚A，8-麦克风引脚A，9-左声道引脚A，10-右声道引脚A，11-电源端，12-左声道端A，13-右声道端A，14-音频模块，15-电源模块，16-耳机插座，17-接地引脚B，18-麦克风引脚B，19-左声道引脚B，20-右声道引脚B，21-麦克风端，22-左声道端B，23-右声道端B，24-检测及控制模块A，25-开关模块A，26-检测及控制模块B，27-开关模块B，28-电能储存模块，29-插头本体，30-底座，31-控制单元，32-控制装置。
具体实施方式
下面结合附图和实施例对本发明作进一步的说明。
本发明的实施例1：一种利用电子设备的电源向ANC耳机供电的方法，其工作流程图如图1所示，当耳机插头插入电子设备的耳机插座时，电子设备、ANC耳机进入检测模式，即电子设备检测该耳机是否处于ANC模式；该检测及控制模块,用以测试耳机插头的特性，以确定它是否是一个ANC耳机或一个普通耳机。检测方法可以采用以下方法：
检测耳机插头的麦克风引脚、左声道引脚或右声道引脚的电气特性（例如阻抗、电容、电感、信号），若检测数据是ANC耳机的电气特性，则该耳机处于ANC模式；若检测数据是普通耳机的电气特性，则该耳机处于普通模式，即非ANC模式。
当ANC耳机处于普通模式（非ANC模式）时，该耳机作为一个普通耳机与电子设备连接并工作，无需电子设备向其输出电源进行供电。
当ANC耳机处于ANC模式时，利用电子设备的电源向该耳机的噪声消除电路供电，电子设备、ANC耳机进入收听模式。
收听模式下，电子设备上的开关模块断开电子设备上音频模块的麦克风端与耳机插座的麦克风引脚的连接，将电子设备的电源模块连接到耳机插座的麦克风引脚；ANC耳机上的开关模块断开耳机插头的麦克风引脚与耳机的免提麦克风电路的连接，将耳机插头的麦克风引脚、左声道引脚和右声道引脚依次连接到噪声消除电路的电源端、左声道端和右声道端。该模式下，免提麦克风不工作，麦克风声道被占用来作为电子设备的电源输出通道。
当电子设备接收或发出对话请求时，电子设备进入对话模式，并发送提醒信号到ANC耳机，ANC耳机向电子设备返回信号，并切换到对话模式下。
对话模式下，电子设备上的开关模块断开电子设备的电源模块与耳机插座的麦克风引脚的连接，断开电子设备上音频模块的左声道端与耳机插座的左声道引脚的连接，将电子设备的电源模块连接到耳机插座的左声道引脚，电子设备上音频模块的右声道端连接到耳机插座的右声道引脚，电子设备上音频模块的麦克风端连接到耳机插座的麦克风引脚；ANC耳机上的开关模块将耳机插头的左声道引脚连接到噪声消除电路的电源端，耳机插头的右声道引脚连接到噪声消除电路的左声道端和右声道端，耳机插头的麦克风引脚连接到耳机的免提麦克风电路。
对话模式下，免提麦克风电路正常连接及工作，而需占用左声道来作为电子设备的电源输出通道，电子设备左声道的音频信号不会传送到耳机，而右声道的音频信号会从右声道传送到耳机的噪声消除电路的左声道端和右声道端，用户从左右两个扬声器中听到的都是右声道的信号。
当对话结束时，电子设备进入收听模式，并发送提醒信号到ANC耳机，ANC耳机向电子设备返回信号，并切换到收听模式。
当ANC耳机的收听模式与对话模式相互切换时，即噪声消除电路的电源端在耳机插头的麦克风引脚与左声道引脚之间转换连接时，ANC耳机在一瞬间没有外来电源。ANC耳机的电能储存模块，在平时(即收听模式和对话模式中)从电子设备中取得电源充电，而在没有外来电源的一瞬间，可继续提供电源给噪声消除电路、检测及控制模块和开关模块。
实现前述方法所使用的一种设备，所述设备包括ANC耳机1和电子设备2，所述电子设备2具有对话功能，所述电子设备2可以是但不限于手机、个人电脑、笔记本电脑、平板电脑中的任意一种；其检测模式的连接关系示意图如图2所示。
所述ANC耳机1包括耳机插头3、音频播放单元4、噪声消除电路5、免提麦克风电路6、检测及控制模块A24、开关模块A25和电能储存模块28，电能储存模块28与电源端11、检测及控制模块A24和开关模块A25均连接，音频播放单元4与噪声消除电路5连接，免提麦克风电路6与开关模块A25连接，所述耳机插头3包括接地引脚A7、麦克风引脚A8、左声道引脚A9和右声道引脚A10，所述噪声消除电路5包括电源端11、左声道端A12和右声道端A13，电源端11通过开关模块A25与麦克风引脚A8相连，左声道端A12通过开关模块A25与左声道引脚A9相连，右声道端A13通过开关模块A25与右声道引脚A10连接，检测及控制模块A24与麦克风引脚A8、左声道引脚A9或右声道引脚A10连接。
所述电子设备2包括音频模块14、电源模块15、耳机插座16、检测及控制模块B26和开关模块B27，电源模块15与开关模块B27连接，所述耳机插座16包括接地引脚B17、麦克风引脚B18、左声道引脚B19及右声道引脚B20，音频模块14包括麦克风端21、左声道端B22和右声道端B23，麦克风引脚B18通过开关模块B27与麦克风端21相连，左声道引脚B19通过开关模块B27与左声道端B22相连，右声道引脚B20通过开关模块B27与右声道端B23相连，检测及控制模块B26与麦克风引脚B18、左声道引脚B19或右声道引脚B20连接。
如图11所示，所述ANC耳机1还包括连接于所述耳机插头3与所述音频播放单元4之间，用于控制所述音频播放单元4的开关状态、播音音量和播音音质的控制单元31。
噪声消除电路5、检测及控制模块A24、开关模块A25和电能储存模块28可以集成在同一个芯片上，该芯片装设于所述控制单元31中。
检测及控制模块B26和开关模块B27也可集成在同一个芯片上，该芯片装设于电子设备2内。
所述电子设备2还包括控制装置32，用于对电源模块15的打开或关闭，及检测及控制模块B26、开关模块B27进行控制。所述控制装置32是硬件、软件模块或固件，且所述控制装置32还用于设置及调节ANC耳机1的工作参数。
工作原理：当耳机插头3插入电子设备2的耳机插座16后，检测及控制模块B26通过麦克风引脚B18、左声道引脚B19或右声道引脚B20检测相对应的麦克风引脚A8、左声道引脚A9或右声道引脚A10的电气特性（例如阻抗、电容、电感、信号），判断ANC耳机1是否工作在ANC模式。如果工作在普通模式（非ANC模式）下，其连接关系示意图如图6所示。
如果是工作在ANC模式，那么电子设备2的初始模式默认为收听模式。其收听模式的连接关系示意图如图3所示，检测及控制模块B26向检测及控制模块A24发送提醒信号，检测及控制模块A24向检测及控制模块B26返回信号，ANC耳机1也进入收听模式。开关模块B27（图中未标出）断开麦克风端21与麦克风引脚B18的连接，将电源模块15连接到麦克风引脚B18，这样就实现了对噪声消除电路5的供电，并且电能储存模块28实时储存电能。
其对话模式的连接关系示意图如图4所示，当电子设备2接收或发出对话请求时，电子设备2进入对话模式，开关模块B27（图中未标出）断开电源模块15与麦克风引脚B18的连接，断开电子设备2上音频模块14的左声道端B22与耳机插座16的左声道引脚B19的连接，将电源模块15连接到左声道引脚B19，音频模块14的右声道端B23连接到耳机插座16的右声道引脚B20，音频模块14的麦克风端21连接到耳机插座16的麦克风引脚B18。检测及控制模块B26向检测及控制模块A24发送提醒信号，检测及控制模块A24向检测及控制模块B26返回信号，ANC耳机1也进入对话模式。开关模块A25（图中未标出）将耳机插头3的左声道引脚A9连接到噪声消除电路5的电源端11，耳机插头3的右声道引脚A10连接到噪声消除电路5的左声道端A12和右声道端A13，耳机插头3的麦克风引脚A8连接到免提麦克风电路6。
此外，在模式切换的瞬间，电能储存模块28将储存的电能提供给噪声消除电路5、检测及控制模块A24和开关模块A25。
当对话结束时，ANC耳机1、电子设备2均切换到收听模式。
本发明的实施例2：本实施例与实施例1相比，区别仅在于：对话模式下，利用电子设备2上耳机插座16的右声道引脚B20向ANC耳机1供应电源。如图5、图7所示，当电子设备2接收或发出对话请求时，电子设备2进入对话模式，开关模块B27（图中未标出）断开电源模块15与麦克风引脚B18的连接，断开音频模块14的右声道端B23与耳机插座16的右声道引脚B20的连接，将电源模块15连接到右声道引脚B20，音频模块14的左声道端B22连接到耳机插座16的左声道引脚B19，音频模块14的麦克风端21连接到耳机插座16的麦克风引脚B18。检测及控制模块B26向检测及控制模块A24发送提醒信号，检测及控制模块A24向检测及控制模块B26返回信号，ANC耳机1也进入对话模式。开关模块A25（图中未标出）将耳机插头3的右声道引脚A10连接到噪声消除电路5的电源端11，耳机插头3的左声道引脚A9连接到噪声消除电路5的左声道端A12和右声道端A13，耳机插头3的麦克风引脚A8连接到免提麦克风电路6。
本发明的实施例3：本实施例与实施例1相比，区别仅在于：电子设备2只在收听模式对ANC耳机1的噪声消除电路5、检测及控制模块A24、开关模块A25和电能储存模块28供电，其收听模式下的供电方法及设备与实施例1相同；而对话模式下，电子设备2是不提供电源给ANC耳机1的，ANC耳机1作为普通耳机的对话应用，没有ANC功能。其供电流程图如图8所示。
当电子设备2接收或发出对话请求时，电子设备2进入对话模式，并发送提醒信号到ANC耳机1，ANC耳机1向电子设备2返回信号，并切换到对话模式下。
如图9所示，对话模式下，电子设备2上的开关模块B27断开电子设备2的电源模块15与耳机插座16的麦克风引脚B18的连接，将电子设备2上音频模块14的麦克风端21连接到耳机插座16的麦克风引脚B18，左声道端B22链接到左声道引脚B19，右声道端B23连接到右声道引脚B20；ANC耳机1上的开关模块A25断开噪声消除电路5的电源端11与耳机插头3的麦克风引脚A8的连接，将耳机插头3的左声道引脚A9连接到音频播放单元4的左声道端，右声道引脚A10连接到音频播放单元4的右声道端，耳机插头3的麦克风引脚A8连接到免提麦克风电路6。
当ANC耳机1在对话模式下，电子设备2不向ANC耳机供电，ANC耳机1没有外来电源，依靠电能储存模块28继续提供电源给检测及控制模块A24和开关模块A25。ANC耳机1的电能储存模块28在平时(即收听模式)从电子设备取得电源充电。
当对话结束时，电子设备2进入收听模式，并发送提醒信号到ANC耳机1，ANC耳机1向电子设备2返回信号，并切换到收听模式。
本发明的实施例4：本实施例与实施例1相比，区别仅在于：如图12所示，耳机插头3包括插头本体29以及与插头本体29连接的底座30，噪声消除电路5、检测及控制模块A24、开关模块A25和电能储存模块28中至少有一个装设于底座30中。
本发明的实施例5：本实施例与实施例2相比，区别仅在于：噪声消除电路5、检测及控制模块A24、开关模块A25和电能储存模块28中至少有一个装设于所述音频播放单元4中。
本发明的实施例6：本实施例与实施例2相比，区别仅在于：噪声消除电路5、检测及控制模块A24、开关模块A25和电能储存模块28中至少有一个连接于所述耳机插头3与所述控制单元31之间，或均连接于所述控制单元31与所述音频播放单元4之间。
本发明的实施例7：本实施例与实施例1相比，区别仅在于：噪声消除电路5、检测及控制模块A24、开关模块A25和电能储存模块28中至少有一个装设于所述控制单元31中。
本发明的实施例8：本实施例与实施例1相比，区别仅在于：以手动选择方法代替自动检测方法，电子设备2和ANC耳机1内的检测及控制模块和开关模块均采用手动开关；ANC耳机1不需要电能储存模块28。其中，检测及控制模块A24和开关模块A25为手动硬件开关，用于打开或者关闭ANC耳机1的收听模式、对话模式；检测及控制模块B26和开关模块B27为手动硬件开关或者人机界面开关，用于打开或者关闭电子设备2的收听模式、对话模式和ANC模式。
本发明的实施例9：如图13所示，本实施例所述检测模式下的检测方法以及收听模式下的供电方法与实施例1是相同的；但在对话模式下，电子设备上的开关模块将电子设备的电源模块连接到耳机插座的麦克风引脚，将电子设备上音频模块的麦克风端连接到耳机插座的左声道引脚；ANC耳机上的开关模块将耳机插头的麦克风引脚连接到噪声消除电路的电源端，将耳机插头的左声道引脚连接到耳机的免提麦克风电路，以及将耳机插头的右声道引脚连接到噪声消除电路的左声道端和右声道端；可以从音频模块的左声道端和右声道端中选择一个声道端连接到耳机插座的右声道引脚，用来传输音频模块发出的左声道信号或右声道信号。
对话模式下，依然采用收听模式下的通过麦克风引脚供电的途径，即继续占用麦克风声道来作为电子设备的电源输出通道，而选择左声道传送免提麦克风信号，使免提麦克风电路正常连接及工作。如果音频模块的左声道端连接到耳机插座的右声道引脚，则左声道的音频信号会从右声道传送到噪声消除电路的左声道端和右声道端，用户从左右两个扬声器中听到的都是左声道的信号；如果音频模块的右声道端连接到耳机插座的右声道引脚，则右声道的音频信号会从右声道传送到噪声消除电路的左声道端和右声道端，用户从左右两个扬声器中听到的都是右声道的信号。
当对话结束时，电子设备进入收听模式，并发送提醒信号到ANC耳机，ANC耳机向电子设备返回信号，并切换到收听模式。
由于收听模式与对话模式的供电途径是相同的，因此不存在模式切换时，ANC耳机瞬间没有电源的情况，也不需要ANC耳机实时储存电能。
在检测模式、收听模式下，实现前述方法的设备及其工作原理与实施例1相似，只是缺少电能储存模块28部分。
而对话模式下的连接关系示意图如图14所示，电源模块15通过开关模块B27与麦克风引脚B18连接，麦克风端21通过开关模块B27（图中未标出）与左声道引脚B19连接，右声道端B23通过开关模块B27与右声道引脚B20连接（也可将左声道端B22连接到右声道引脚B20），麦克风引脚A8通过开关模块A25（图中未标出）与电源端11连接，左声道引脚A9通过开关模块A25与免提麦克风电路6连接，右声道引脚A10通过开关模块A25分别与左声道端A12和右声道端A13连接。
噪声消除电路5、检测及控制模块A24和开关模块A25的装设位置可以采用实施例4-7中的任意一种。
本发明的实施例10：本实施例与实施例9相比，区别仅在于：对话模式下，采用右声道代替麦克风引脚来传送麦克风信号，其一种连接关系示意图如图15所示。
以上实施例1-10中，所述ANC耳机1还包括手动开关或电动开关，用于打开或关闭ANC耳机1的ANC模式，所述手动开关或电动开关设置在所述控制单元31上；所述电子设备2、ANC耳机1内的检测及控制模块和开关模块可以通过电子电路技术来实现。
以上实施例1-10中，电子设备2检测ANC耳机1是否处于ANC模式还可以采用以下方式：检测及控制模块B26向检测及控制模块A 24发送询问信号，检测及控制模块A24将 ANC耳机1所处模式（ANC模式或者非ANC模式）以信号形式返回到检测及控制模块B26，通过信号交换来完成对该耳机的检测。在检测模式下，由于音频模块14的麦克风端21提供的偏置电压通过耳机插座16的麦克风引脚B18传送到耳机插头3的麦克风引脚A8，与麦克风引脚A8连接的检测及控制模块A24也会获得电源，来完成与检测及控制模块B26的信号交换。
此外，当电子设备2为普通音频设备，比如音乐播放器、视频播放器、多媒体播放器、便携式游戏机等，其耳机插座没有麦克风引脚，不能向ANC耳机1供电，所述ANC耳机1与电子设备2之间的连接关系如图10所示。但是，本发明所述ANC耳机1的4极耳机插头与普通音频设备的3极耳机插座是可以匹配使用的，完成普通耳机的收听功能。

Claims (1)

1、一种利用电子设备的电源向ANC耳机供电的方法，其特征在于：收听模式下，电子设备的电源模块通过耳机插座内的麦克风引脚向ANC耳机插头上的麦克风引脚输出电源，以利用所述电子设备的电源向ANC耳机的噪声消除电路供电。
2、根据权利要求1所述的利用电子设备的电源向ANC耳机供电的方法，其特征在于：对话模式下，电子设备的电源模块通过耳机插座内的左声道引脚或右声道引脚向ANC耳机插头上的对应的声道引脚输出电源，以利用所述电子设备的电源向ANC耳机的噪声消除电路供电。
3、根据权利要求1所述的利用电子设备的电源向ANC耳机供电的方法，其特征在于：对话模式下，电子设备的电源模块通过耳机插座内的麦克风引脚向ANC耳机插头上的麦克风引脚输出电源，以利用所述电子设备的电源向ANC耳机的噪声消除电路供电；而ANC耳机发出的免提麦克风信号则通过电子设备的耳机插座内的左声道引脚或右声道引脚来接收。
4、根据权利要求1或2或3所述的利用电子设备的电源向ANC耳机供电的方法，其特征在于：当耳机插头插入电子设备的耳机插座时，电子设备检测该耳机是否处于ANC模式；当耳机处于ANC模式时，才利用电子设备的电源向该耳机的噪声消除电路供电；当耳机处于非ANC模式时，该耳机作为一个普通耳机与电子设备连接并工作，无需电子设备向其输出电源进行供电。
5、根据权利要求4所述的利用电子设备的电源向ANC耳机供电的方法，其特征在于，电子设备检测耳机是否处于ANC模式包括：检测耳机插头的麦克风引脚、左声道引脚或右声道引脚的电气特性，若检测数据是ANC耳机的电气特性，则该耳机处于ANC模式；若检测数据是普通耳机的电气特性，则该耳机处于普通模式，即非ANC模式。
6、根据权利要求4所述的利用电子设备的电源向ANC耳机供电的方法，其特征在于：电子设备的收听模式与对话模式相互切换时，电子设备会发出提醒信号到ANC耳机，ANC耳机向电子设备返回信号，并切换到与电子设备相同的模式下。
7、根据权利要求6所述的利用电子设备的电源向ANC耳机供电的方法，其特征在于，收听模式下的供电方法包括：电子设备上的开关模块断开电子设备上音频模块的麦克风端与耳机插座的麦克风引脚的连接，将电子设备的电源模块连接到耳机插座的麦克风引脚；ANC耳机上的开关模块断开耳机插头的麦克风引脚与耳机的免提麦克风电路的连接，将耳机插头的麦克风引脚、左声道引脚和右声道引脚依次连接到噪声消除电路的电源端、左声道端和右声道端。
8、根据权利要求2所述的利用电子设备的电源向ANC耳机供电的方法，其特征在于，对话模式下的供电方法包括：
（1）电子设备上的开关模块断开电子设备的电源模块与耳机插座的麦克风引脚的连接，断开电子设备上音频模块的左声道端与耳机插座的左声道引脚的连接，将电子设备的电源模块连接到耳机插座的左声道引脚，电子设备上音频模块的右声道端连接到耳机插座的右声道引脚，电子设备上音频模块的麦克风端连接到耳机插座的麦克风引脚；ANC耳机上的开关模块将耳机插头的左声道引脚连接到噪声消除电路的电源端，耳机插头的右声道引脚连接到噪声消除电路的左声道端和右声道端，耳机插头的麦克风引脚连接到耳机的免提麦克风电路；
（2）电子设备上的开关模块断开电子设备的电源模块与耳机插座的麦克风引脚的连接，断开电子设备上音频模块的右声道端与耳机插座的右声道引脚的连接，将电子设备的电源模块连接到耳机插座的右声道引脚，电子设备上音频模块的左声道端连接到耳机插座的左声道引脚，电子设备上音频模块的麦克风端连接到耳机插座的麦克风引脚；ANC耳机上的开关模块将耳机插头的右声道引脚连接到噪声消除电路的电源端，耳机插头的左声道引脚连接到噪声消除电路的左声道端和右声道端，耳机插头的麦克风引脚连接到耳机的免提麦克风电路。
9、根据权利要求3所述的利用电子设备的电源向ANC耳机供电的方法，其特征在于，对话模式下的供电方法包括：
（1）电子设备上的开关模块将电子设备的电源模块连接到耳机插座的麦克风引脚，将电子设备上音频模块的麦克风端连接到耳机插座的左声道引脚；ANC耳机上的开关模块将耳机插头的麦克风引脚连接到噪声消除电路的电源端，将耳机插头的左声道引脚连接到耳机的免提麦克风电路，以及将耳机插头的右声道引脚连接到噪声消除电路的左声道端和右声道端；
（2）电子设备上的开关模块将电子设备的电源模块连接到耳机插座的麦克风引脚，将电子设备上音频模块的麦克风端连接到耳机插座的右声道引脚；ANC耳机上的开关模块将耳机插头的麦克风引脚连接到噪声消除电路的电源端，将耳机插头的右声道引脚连接到耳机的免提麦克风电路，以及将耳机插头的左声道引脚连接到噪声消除电路的左声道端和右声道端。
10、根据权利要求2所述的利用电子设备的电源向ANC耳机供电的方法，其特征在于：当ANC耳机的收听模式与对话模式相互切换时，即噪声消除电路的电源端在耳机插头的麦克风引脚与左声道引脚或右声道引脚之间转换连接时，ANC耳机储存电能并提供电源给噪声消除电路和耳机上的开关模块。
11、根据权利要求1所述的利用电子设备的电源向ANC耳机供电的方法，其特征在于：所述电子设备具有对话功能，所述电子设备为手机、个人电脑、笔记本电脑、平板电脑中的任意一种。
12、实现权利要求1～11所述方法的一种利用电子设备的电源向ANC耳机供电的设备，包括ANC耳机（1）和电子设备（2）；所述ANC耳机（1）包括耳机插头（3）、音频播放单元（4）、噪声消除电路（5）和免提麦克风电路（6），所述耳机插头（3）包括接地引脚A（7）、麦克风引脚A（8）、左声道引脚A（9）和右声道引脚A（10），所述噪声消除电路（5）包括电源端（11）、左声道端A（12）和右声道端A（13），音频播放单元（4）与噪声消除电路（5）连接；所述电子设备（2）包括音频模块（14）、电源模块（15）和耳机插座（16），所述耳机插座（16）包括接地引脚B（17）、麦克风引脚B（18）、左声道引脚B（19）及右声道引脚B（20），音频模块（14）包括麦克风端（21）、左声道端B（22）和右声道端B（23），其特征在于：ANC耳机（1）还包括检测及控制模块A（24）和开关模块A（25），检测及控制模块A（24）与耳机插头（3）连接，噪声消除电路（5）、免提麦克风电路（6）均通过开关模块A（25）与耳机插头（3）连接；电子设备（2）还包括检测及控制模块B（26）和开关模块B（27），检测及控制模块B（26）与耳机插座（16）连接，音频模块（14）、电源模块（15）均通过开关模块B（27）与耳机插座（16）连接。
13、根据权利要求12所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：电源模块（15）通过开关模块B（27）与麦克风引脚B（18）连接，左声道端B（22）通过开关模块B（27）与左声道引脚B（19）连接，右声道端B（23）通过开关模块B（27）与右声道引脚B（20）连接，麦克风引脚A（8）通过开关模块A（25）与电源端（11）连接，左声道引脚A（9）通过开关模块A（25）与左声道端A（12）连接，右声道引脚A（10）通过开关模块A（25）与右声道端A（13）连接。
14、根据权利要求12所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：电源模块（15）通过开关模块B（27）与左声道引脚B（19）连接，麦克风端（21）通过开关模块B（27）与麦克风引脚B（18）连接，右声道端B（23）通过开关模块B（27）与右声道引脚B（20）连接，麦克风引脚A（8）通过开关模块A（25）与免提麦克风电路（6）连接，左声道引脚A（9）通过开关模块A（25）与电源端（11）连接，右声道引脚A（10）通过开关模块A（25）分别与左声道端A（12）、右声道端A（13）连接。
15、根据权利要求12所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：电源模块（15）通过开关模块B（27）与右声道引脚B（20）连接，麦克风端（21）通过开关模块B（27）与麦克风引脚B（18）连接，左声道端B（22）通过开关模块B（27）与左声道引脚B（19）连接，麦克风引脚A（8）通过开关模块A（25）与免提麦克风电路（6）连接，左声道引脚A（9）通过开关模块A（25）分别与左声道端A（12）、右声道端A（13）连接，右声道引脚A（10）通过开关模块A（25）与电源端（11）连接。
16、根据权利要求12所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：电源模块（15）通过开关模块B（27）与麦克风引脚B（18）连接，麦克风端（21）通过开关模块B（27）与左声道引脚B（19）连接，麦克风引脚A（8）通过开关模块A（25）与电源端（11）连接，左声道引脚A（9）通过开关模块A（25）与免提麦克风电路（6）连接，右声道引脚A（10）通过开关模块A（25）分别与左声道端A（12）和右声道端A（13）连接。
17、根据权利要求12所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：电源模块（15）通过开关模块B（27）与麦克风引脚B（18）连接，麦克风端（21）通过开关模块B（27）与右声道引脚B（20）连接，麦克风引脚A（8）通过开关模块A（25）与电源端（11）连接，右声道引脚A（10）通过开关模块A（25）与免提麦克风电路（6）连接，左声道引脚A（9）通过开关模块A（25）分别与左声道端A（12）和右声道端A（13）连接。
18、根据权利要求12所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：麦克风端（21）通过开关模块B（27）与麦克风引脚B（18）连接，左声道端B（22）通过开关模块B（27）与左声道引脚B（19）连接，右声道端B（23）通过开关模块B（27）与右声道引脚B（20）连接，麦克风引脚A（8）通过开关模块A（25）与免提麦克风电路（6）连接，左声道引脚A（9）、右声道引脚A（10）均通过开关模块A（25）与音频播放单元（4）连接。
19、根据权利要求13或14或15或16或17或18所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：检测及控制模块A（24）与耳机插头（3）的麦克风引脚A（8）、左声道引脚A（9）或右声道引脚A（10）连接。
20、根据权利要求13或14或15或16或17或18所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：检测及控制模块B（26）与耳机插座（16）的麦克风引脚B（18）、左声道引脚B（19）或右声道引脚B（20）连接。
21、根据权利要求13或14或15或18所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：所述ANC耳机（1）包括电能储存模块（28），电能储存模块（28）分别与电源端（11）、检测及控制模块A（24）和开关模块A（25）连接。
22、根据权利要求19所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：噪声消除电路（5）、检测及控制模块A（24）和开关模块A（25）集成在同一个芯片上。
23、根据权利要求21所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：噪声消除电路（5）、检测及控制模块A（24）、开关模块A（25）和电能储存模块（28）集成在同一个芯片上。
24、根据权利要求20所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：检测及控制模块B（26）和开关模块B（27）集成在同一个芯片上。
25、根据权利要求13或14或15或16或17或18所述的设备，其特征在于：所述ANC耳机（1）还包括手动开关或电动开关，用于打开或关闭ANC耳机（1）的ANC模式。
26、根据权利要求20所述的利用电子设备的电源向ANC耳机供电的设备，其特征在于：检测及控制模块A（24）和开关模块A（25）采用手动硬件开关，用于打开或者关闭ANC耳机（1）的收听模式、对话模式；检测及控制模块B（26）和开关模块B（27）采用手动硬件开关或者人机界面开关，用于打开或者关闭电子设备（2）的收听模式、对话模式和ANC模式。
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