CN108668204B

CN108668204B - Multiplexing circuit, wearable device and wearable device working mode switching method

Info

Publication number: CN108668204B
Application number: CN201810387042.3A
Authority: CN
Inventors: 张伟正
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-04-26
Filing date: 2018-04-26
Publication date: 2021-03-09
Anticipated expiration: 2038-04-26
Also published as: CN108668204A

Abstract

The application discloses multiplexing circuit, wearable equipment and wearable equipment mode switching method, this multiplexing circuit sets up in wearable equipment, and multiplexing circuit includes: the wireless charging device comprises a coil, a selection circuit, an audio playing circuit, a wireless charging circuit and a first controller; the coil is connected with the selection end of the selection circuit, and the first fixed end of the selection circuit is connected with the input end of the wireless charging circuit; the second fixed end of the selection circuit is connected with the output end of the audio playing circuit; the output end of the first controller is connected with the control end of the selection circuit; when the first controller controls the selection end of the selection circuit to be communicated with the input end of the wireless charging circuit, the multiplexing circuit works in a wireless charging mode; when the first controller controls the selection end of the selection circuit to be communicated with the output end of the audio playing circuit, the multiplexing circuit works in an audio playing mode. Adopt this application embodiment can improve wearable equipment's space utilization.

Description

Multiplexing circuit, wearable device and method for switching working modes of wearable device

Technical Field

The application relates to the technical field of electronics, in particular to a multiplexing circuit, wearable equipment and a method for switching working modes of the wearable equipment.

Background

With the maturity of wireless technology, the smart phone is connected with the wearable device through wireless technology in an increasing number of scenes. For example, the user can realize functions of listening to music, making a call and the like through the wearable device. For example, for a wireless headset, a charging interface is generally arranged on the wireless headset for charging, so that the appearance of the wearable device is affected, and the charging interface occupies too much space, which may result in the increase of the volume of the wearable device.

Disclosure of Invention

The embodiment of the application provides a multiplexing circuit, wearable equipment and a method for switching the working mode of the wearable equipment, and the space utilization rate of the wearable equipment can be improved.

In a first aspect, an embodiment of the present application provides a multiplexing circuit, where the multiplexing circuit is disposed in a wearable device, and the multiplexing circuit includes: the wireless charging device comprises a coil, a selection circuit, an audio playing circuit, a wireless charging circuit and a first controller;

the coil is connected with the selection end of the selection circuit, and the first fixed end of the selection circuit is connected with the input end of the wireless charging circuit; the second fixed end of the selection circuit is connected with the output end of the audio playing circuit; the output end of the first controller is connected with the control end of the selection circuit;

when the first controller controls the selection end of the selection circuit to be communicated with the input end of the wireless charging circuit, the multiplexing circuit works in a wireless charging mode;

when the first controller controls the selection end of the selection circuit to be communicated with the output end of the audio playing circuit, the multiplexing circuit works in an audio playing mode.

In a second aspect, an embodiment of the present application provides a wearable device, where the wearable device includes a housing, a speaker assembly, and any one of the multiplexing circuits in the first aspect of the present application, where the speaker assembly includes a coil, a magnet, and a diaphragm, the coil is connected to the diaphragm, and when a current flows through the coil, the coil vibrates under a magnetic field generated by the magnet to drive the diaphragm to generate sound; the loudspeaker assembly is fixedly arranged in the shell.

In a third aspect, an embodiment of the present application provides a method for switching operating modes of a wearable device, where the method is applied to the wearable device according to the second aspect of the embodiment of the present application, and the method includes:

detecting whether a coil of the wearable device generates an induced current;

if yes, controlling the wearable equipment to work in a wireless charging mode;

if not, controlling the wearable equipment to work in an audio playing mode.

In a fourth aspect, embodiments of the present application provide a wearable device, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the programs include instructions for performing the steps of the method of the third aspect of the embodiments of the present application.

In a fifth aspect, embodiments of the present application provide a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program causes a wearable device to perform some or all of the steps as described in the method of the third aspect of the embodiments of the present application.

In a sixth aspect, embodiments of the present application provide a computer program product, where the computer program product comprises a non-transitory computer-readable storage medium storing a computer program, where the computer program is operable to cause a wearable device to perform some or all of the steps as described in the method of the third aspect of the embodiments of the present application. The computer program product may be a software installation package.

In the embodiment of the application, the multiplexing circuit determines the working mode of the multiplexing circuit through a circuit which is connected with a selection end of a first controller control selection circuit, and when the selection end of the first controller control selection circuit is communicated with the input end of the wireless charging circuit, the multiplexing circuit works in the wireless charging mode; when the first controller controls the selection end of the selection circuit to be communicated with the output end of the audio playing circuit, the multiplexing circuit works in an audio playing mode. The embodiment of the application can regard the coil as time division multiplexing's coil, can realize audio playback function and wireless function of charging through a coil, need not additionally to increase the coil that is used for wireless charging in wearable equipment, can the very big space of saving wearable equipment to improve wearable equipment's space utilization.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1a is a schematic diagram of a network architecture disclosed in an embodiment of the present application;

fig. 1b is a schematic structural diagram of a wearable device disclosed in the embodiments of the present application;

FIG. 2 is a multiplexing circuit disclosed in an embodiment of the present application;

fig. 3a is a schematic diagram of a multiplexing circuit operating in a wireless charging mode according to an embodiment of the disclosure;

fig. 3b is a schematic diagram of a multiplexing circuit operating in an audio playback mode according to an embodiment of the present application;

FIG. 4 is another multiplexing circuit disclosed in an embodiment of the present application;

FIG. 5 is another multiplexing circuit disclosed in an embodiment of the present application;

fig. 6a is a schematic diagram of another multiplexing circuit disclosed in the embodiment of the present application, which operates in a wireless charging mode;

fig. 6b is a schematic diagram of another multiplexing circuit disclosed in the embodiment of the present application, which operates in an audio playback mode;

FIG. 7 is another multiplexing circuit disclosed in an embodiment of the present application;

FIG. 8 is another multiplexing circuit disclosed in an embodiment of the present application;

FIG. 9 is another multiplexing circuit disclosed in an embodiment of the present application;

FIG. 10 is another multiplexing circuit disclosed in an embodiment of the present application;

fig. 11 is a schematic structural diagram of another wearable device disclosed in the embodiments of the present application;

fig. 12 is a schematic structural view of an energy emitting device disclosed in an embodiment of the present application;

fig. 13 is a schematic diagram of energy transfer between a transmitting coil of an energy transmitting device and a speaker coil in a wearable device according to the present disclosure;

fig. 14 is a flowchart illustrating a method for switching operating modes of a wearable device according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The following are detailed below.

The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The electronic apparatus may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem having wireless communication functions, as well as various forms of User Equipment (UE), Mobile Stations (MS), terminal Equipment (terminal device), and so on. For convenience of description, the above-mentioned apparatuses are collectively referred to as electronic devices.

The following describes embodiments of the present application in detail.

Referring to fig. 1a, fig. 1a is a schematic diagram of a network architecture according to an embodiment of the present disclosure. In the network architecture shown in fig. 1a, a wearable device 10 and an electronic apparatus 20 may be included, wherein the wearable device 10 may be communicatively connected to the electronic apparatus 20 via a wireless network (e.g., bluetooth, infrared, or WiFi). It should be noted that the number of the wearable devices 10 may be one or more, and the embodiment of the present application is not limited. The wearable device 10 may send a pairing request to the electronic apparatus 20, and the electronic apparatus 20 may receive the pairing request sent by the wearable device 10 for pairing. Optionally, as shown in fig. 1a, the wearable device 10 may further establish a wireless communication connection with the energy emitting apparatus 30, and after the wearable device 10 is successfully connected with the energy emitting apparatus 30, the energy emitting apparatus 30 may emit energy to the wearable device, so as to wirelessly charge the wearable device.

The wearable device in the embodiments of the present application may include any wearable device capable of audio playback, such as a wireless headset. For convenience of explanation, the wearable devices in the following embodiments are all described by taking a wireless headset as an example.

The wireless earphone may be an ear-hanging earphone, an earplug earphone, or a headphone, and the embodiments of the present application are not limited.

The wireless headset may be housed in a headset case, which may include: two receiving cavities (a first receiving cavity and a second receiving cavity) sized and shaped to receive a pair of wireless headsets (a first wireless headset and a second wireless headset); one or more earphone housing magnetic components disposed within the case for magnetically attracting and respectively magnetically securing a pair of wireless earphones into the two receiving cavities. The earphone box may further include an earphone cover. Wherein the first receiving cavity is sized and shaped to receive a first wireless headset and the second receiving cavity is sized and shaped to receive a second wireless headset.

The wireless headset may include a headset housing, a rechargeable battery (e.g., a lithium battery) disposed within the headset housing, a plurality of metal contacts for connecting the battery to a charging device, the driver unit including a magnet, a voice coil, and a diaphragm, the driver unit for emitting sound from a directional sound port, and a speaker assembly including a directional sound port, the plurality of metal contacts being disposed on an exterior surface of the headset housing.

In one possible implementation, the wireless headset may further include a touch area, which may be located on an outer surface of the headset housing, and at least one touch sensor is disposed in the touch area for detecting a touch operation, and the touch sensor may include a capacitive sensor. When a user touches the touch area, the at least one capacitive sensor may detect a change in self-capacitance to recognize a touch operation.

In one possible implementation, the wireless headset may further include an acceleration sensor and a triaxial gyroscope, the acceleration sensor and the triaxial gyroscope may be disposed within the headset housing, and the acceleration sensor and the triaxial gyroscope are used to identify a picking up action and a taking down action of the wireless headset.

In a possible implementation manner, the wireless headset may further include at least one air pressure sensor, and the air pressure sensor may be disposed on a surface of the headset housing and configured to detect air pressure in the ear after the wireless headset is worn. The wearing tightness of the wireless earphone can be detected through the air pressure sensor. When it is detected that the wireless earphone is worn loosely, the wireless earphone can send prompt information to an electronic device connected with the wireless earphone so as to prompt a user that the wireless earphone has a risk of falling.

Referring to fig. 1b, fig. 1b is a schematic structural diagram of a wearable device disclosed in the embodiment of the present application, the wearable device 10 includes a storage and processing circuit 710, and a communication circuit 720 and an audio component 740 connected to the storage and processing circuit 710, wherein in some specific wearable devices 10, a display component 730 or a touch component may be further disposed.

The wearable device 10 may include control circuitry, which may include storage and processing circuitry 710. The storage and processing circuit 710 may be a memory, such as a hard disk drive memory, a non-volatile memory (e.g., a flash memory or other electronically programmable read-only memory used to form a solid state drive, etc.), a volatile memory (e.g., a static or dynamic random access memory, etc.), etc., and the embodiments of the present application are not limited thereto. The processing circuitry in storage and processing circuitry 710 may be used to control the operation of wearable device 10. The processing circuitry may be implemented based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, display driver integrated circuits, and the like.

The storage and processing circuit 710 may be used to run software in the wearable device 10, such as Voice Over Internet Protocol (VOIP) phone call applications, simultaneous interpretation functions, media playing applications, operating system functions, and the like. Such software may be used to perform control operations such as, for example, camera-based image capture, ambient light measurement based on an ambient light sensor, proximity sensor measurement based on a proximity sensor, information display functions implemented based on a status indicator such as a status indicator light of a light emitting diode, touch event detection based on a touch sensor, operations associated with performing wireless communication functions, operations associated with collecting and generating audio signals, control operations associated with collecting and processing button press event data, and other functions in wearable device 10, to name a few.

The wearable device 10 may also include input-output circuitry 750. The input-output circuitry 750 may be used to enable the wearable device 10 to enable input and output of data, i.e., to allow the wearable device 10 to receive data from an external device and also to allow the wearable device 10 to output data from the wearable device 10 to an external device. Input-output circuit 750 may further include a sensor 770. The sensors 770 may include ambient light sensors, proximity sensors based on light and capacitance, touch sensors (e.g., based on optical touch sensors and/or capacitive touch sensors, where the touch sensors may be part of a touch display screen or used independently as a touch sensor structure), acceleration sensors, and other sensors, among others.

Input-output circuitry 750 may also include a touch sensor array (i.e., display 730 may be a touch display screen). The touch sensor may be a capacitive touch sensor formed by a transparent touch sensor electrode (e.g., an Indium Tin Oxide (ITO) electrode) array, or may be a touch sensor formed using other touch technologies, such as acoustic wave touch, pressure sensitive touch, resistive touch, optical touch, and the like, and the embodiments of the present application are not limited thereto.

The wearable device 10 may also include an audio component 740. The audio component 740 may be used to provide audio input and output functionality for the wearable device 10. The audio components 740 in the wearable device 10 may include speakers, microphones, buzzers, tone generators, and other components for generating and detecting sounds.

Communication circuit 720 may be used to provide wearable device 10 with the ability to communicate with external devices. The communications circuitry 720 may include analog and digital input-output interface circuitry, and wireless communications circuitry based on radio frequency signals and/or optical signals. The wireless communication circuitry in communication circuitry 720 may include radio-frequency transceiver circuitry, power amplifier circuitry, low noise amplifiers, switches, filters, and antennas. For example, the wireless Communication circuitry in Communication circuitry 720 may include circuitry to support Near Field Communication (NFC) by transmitting and receiving Near Field coupled electromagnetic signals. For example, communications circuitry 720 may include a near field communications antenna and a near field communications transceiver. The communications circuitry 720 may also include a cellular telephone transceiver and antenna, a wireless local area network transceiver circuit and antenna, and so forth.

The wearable device 10 may further include a battery, power management circuitry, and other input-output units 760. Input-output unit 760 may include buttons, joysticks, click wheels, scroll wheels, touch pads, keypads, keyboards, cameras, light emitting diodes or other status indicators, and the like.

A user may input commands through the input-output circuitry 750 to control operation of the wearable device 10, and may use output data of the input-output circuitry 750 to enable receipt of status information and other outputs from the wearable device 10.

Referring to fig. 2, fig. 2 is a multiplexing circuit 100 disclosed in the embodiment of the present application, the multiplexing circuit 100 is disposed in a wearable device 10, and the multiplexing circuit 100 may include a coil 11, a selection circuit 12, an audio playing circuit 14, a wireless charging circuit 13, and a first controller 15;

the coil 11 is connected with the selection end 120 of the selection circuit 12, and the first fixed end 121 of the selection circuit 12 is connected with the input end 131 of the wireless charging circuit 13; the second fixed end 122 of the selection circuit 12 is connected to the output end 141 of the audio playing circuit 14; the output 151 of the first controller 15 is connected to the control terminal 123 of the selection circuit 12.

The multiplexing circuit 100 may time-division multiplex audio playback and wireless charging.

As shown in fig. 3a, when the first controller 15 controls the selection terminal 120 of the selection circuit 12 to communicate with the input terminal 131 of the wireless charging circuit 13, the multiplexing circuit 100 operates in the wireless charging mode. At this time, the coil 11 and the wireless charging circuit 13 constitute a wireless charging path. The coil 11 can be used for receiving wireless electromagnetic energy transmitted by an external energy transmitting device and providing electric energy for the wireless charging circuit 13, and the multiplexing circuit 100 can realize the wireless charging function of the wireless earphone. In fig. 3a, the selection terminal 120 of the selection circuit 12 is disconnected from the output terminal 141 of the audio playback circuit 14, and the audio playback path is disconnected. The coil in fig. 3a is used to collect magnetic energy and convert the magnetic energy into electrical energy, according to the electromagnetic induction effect.

As shown in fig. 3b, when the first controller 15 controls the selection terminal 120 of the selection circuit 12 to communicate with the output terminal 141 of the audio playing circuit 14, the multiplexing circuit 100 operates in the audio playing mode. At this time, the coil 11 and the audio playback circuit 14 constitute an audio playback path. The coil 11 can be used for receiving alternating current output by the audio playing circuit to generate mechanical vibration, so that sound production, sound effect production and audio playing function are realized. In fig. 3b, the selection terminal 120 of the selection circuit 12 is disconnected from the input terminal 131 of the wireless charging circuit 13, and the wireless charging path is disconnected. The coil in fig. 3b is used for receiving the alternating current output by the audio playback circuit 14 to generate a changing magnetic field, the changing magnetic field and the magnetic force of the magnet in the speaker assembly drive the diaphragm to vibrate, so as to generate sound, and the coil in fig. 3b is used for converting the electric energy into the mechanical energy.

It is understood that the selection terminal 120, the first fixing terminal 121, and the second fixing terminal 122 of the selection circuit 12 in fig. 2, fig. 3a, and fig. 3b are a simple illustration for convenience of describing the wireless charging path and the audio playing path. In an actual circuit, the wireless charging circuit 13 and the audio playing circuit 14 both have a positive port and a negative port, and the coil 11 may also have a coil positive terminal and a coil negative terminal. Since the current passing through the coil 11 is generally an alternating current, the positive coil end and the negative coil end are not strictly distinguished.

The wearable device 10 in the embodiment of the present application may be a wireless headset, and the coil 11 may be a speaker coil. With the speaker coil as time division multiplexing's coil, can realize audio playback function and wireless function of charging through a speaker coil, need not additionally to increase the coil that is used for wireless charging in wireless earphone, can the very big space of saving wearable equipment to improve the space utilization who can wireless earphone.

Optionally, referring to fig. 4, fig. 4 is another multiplexing circuit disclosed in the embodiment of the present application. As shown in fig. 4, the selecting terminal 120 includes a positive selecting terminal 1201 and a negative selecting terminal 1202, the first fixing terminal 121 includes a first positive fixing terminal 1211 and a first negative fixing terminal 1212, and the second fixing terminal 122 includes a second positive fixing terminal 1221 and a second negative fixing terminal 1222; the coil 11 includes a coil positive terminal 111 and a coil negative terminal 112; the positive coil terminal 111 is connected to the positive selection terminal 1201, and the negative coil terminal 112 is connected to the negative selection terminal 1202.

Optionally, the input 131 of the wireless charging circuit 13 may include a first charging input 1311 and a second charging input 1312, the first charging input 1311 is connected to the first positive fixing end 1211, and the second charging input 1312 is connected to the first negative fixing end 1212.

The output 141 of the audio playback circuit 14 may include a first audio output 1411 and a second audio output 1412, the first audio output 1411 being connected to the second positive fixed end 1221, the second audio output 1412 being connected to the second negative fixed end 1222.

In the embodiment of the present application, when the multiplexing circuit 100 operates in the wireless charging mode, the positive selection terminal 1201 of the selection circuit 12 is communicated with the first positive fixing terminal 1211, and the negative selection terminal 1202 is communicated with the first negative fixing terminal 1212. When the multiplexing circuit 100 operates in the audio play mode, the positive selection terminal 1201 of the selection circuit 12 is in communication with the second positive fixed terminal 1221, and the negative selection terminal 1202 is in communication with the second negative fixed terminal 1222.

Alternatively, as shown in fig. 5, the selection circuit 12 includes a Double Pole Double Throw switch (DPDT) including a first movable contact a1, a second movable contact a2, a first fixed contact S1, a second fixed contact S2, a third fixed contact S3, and a fourth fixed contact S4;

the positive select terminal 1201 is connected to the first movable contact A1, the negative select terminal 1202 is connected to the second movable contact A2, the first positive fixed terminal 1211 is connected to the first stationary contact S1, the first negative fixed terminal 1212 is connected to the second stationary contact S2, the second positive fixed terminal 1221 is connected to the third stationary contact S3, and the second negative fixed terminal 1222 is connected to the fourth stationary contact S4.

Alternatively, as shown in fig. 6a, when the multiplexing circuit 100 operates in the wireless charging mode, the first controller 15 controls the first movable contact a1 of the double-pole double-throw switch 12 to connect to the first fixed contact S1, and controls the second movable contact a2 of the double-pole double-throw switch 12 to connect to the second fixed contact S2.

The first controller 15 may send a first control signal to the double-pole double-throw switch 12, where the first control signal is used to control the first movable contact a1 of the double-pole double-throw switch 12 to connect with the first stationary contact S1, and control the second movable contact a2 of the double-pole double-throw switch 12 to connect with the second stationary contact S2.

Alternatively, as shown in fig. 6b, when the multiplexing circuit 100 operates in the audio playback mode, the first controller 105 controls the first movable contact a1 of the double-pole double-throw switch 12 to connect to the third stationary contact S3, and controls the second movable contact a2 of the double-pole double-throw switch 12 to connect to the fourth stationary contact S4.

The first controller 15 may send a second control signal to the double-pole double-throw switch 12, where the second control signal is used to control the first movable contact a1 of the double-pole double-throw switch 12 to connect with the third stationary contact S3, and control the second movable contact a2 of the double-pole double-throw switch 12 to connect with the fourth stationary contact S4.

The first control signal is a high level signal, and the second control signal is a low level signal; or, the first control signal is a low level signal, and the second control signal is a high level signal. For example, the high level signal may be a voltage signal of 3.3V, and the low level signal may be a voltage signal of 0V.

Optionally, as shown in fig. 7, the selection circuit 12 includes a first switch transistor T1, a second switch transistor T2, a third switch transistor T4 and a fourth switch transistor T4, and the output 151 of the first controller 15 includes a first output terminal, a second output terminal, a third output terminal and a fourth output terminal (the first output terminal, the second output terminal, the third output terminal and the fourth output terminal are not labeled in fig. 7); the control terminal 123 of the selection circuit 12 includes a control terminal of the first switch transistor T1, a control terminal of the second switch transistor T2, a control terminal of the third switch transistor T3, and a control terminal of the fourth switch transistor T4 (not labeled in fig. 7).

The positive selection terminal 1201 is connected to the first terminal of the first switch transistor T1 and the first terminal of the second switch transistor T2, the second terminal of the first switch transistor T1 is connected to the first positive fixing terminal 1211, and the second terminal of the second switch transistor T2 is connected to the second positive fixing terminal 1221;

the negative selection terminal 1202 is connected to the first terminal of the third switching tube T3 and the first terminal of the fourth switching tube T4, the second terminal of the third switching tube T3 is connected to the first negative fixed terminal 1212, and the second terminal of the fourth switching tube T4 is connected to the second negative fixed terminal 1222;

the first output end is connected with the control end of the first switch tube T1, the second output end is connected with the control end of the second switch tube T2, the third output end is connected with the control end of the third switch tube T3, and the fourth output end is connected with the control end of the fourth switch tube T4.

The switching tube may be a metal-oxide semiconductor (MOS) field effect Transistor, an Insulated Gate Bipolar Transistor (IGBT), a triode, or other semiconductor switching tube.

When the multiplexing circuit 100 operates in the wireless charging mode, the first controller 15 controls the first switch transistor T1 and the third switch transistor T3 to be turned on, and controls the second switch transistor T2 and the fourth switch transistor T4 to be turned off. For example, if the switching tubes are all NMOS tubes and the control ends of the switching tubes are gates, the first output end and the third output end of the first controller 15 output high level signals, and the second output end and the fourth output end of the first controller 15 output low level signals; if the switching tubes are all PMOS tubes and the control ends of the switching tubes are gates, the first output end and the third output end of the first controller 15 output low level signals, and the second output end and the fourth output end of the first controller 15 output high level signals. Wherein, the high level signal may be a voltage signal of 3.3V, and the low level signal may be a voltage signal of 0V.

When the multiplexing circuit 100 operates in the audio playing mode, the first controller 15 controls the first switch transistor T1 and the third switch transistor T3 to be turned off, and controls the second switch transistor T2 and the fourth switch transistor T4 to be turned on. For example, if the switching tubes are all NMOS tubes and the control ends of the switching tubes are gates, the first output end and the third output end of the first controller 15 output low level signals, and the second output end and the fourth output end of the first controller 15 output high level signals; if the switching tubes are all PMOS tubes and the control ends of the switching tubes are gates, the first output end and the third output end of the first controller 15 output high level signals, and the second output end and the fourth output end of the first controller 15 output low level signals. Wherein, the high level signal may be a voltage signal of 3.3V, and the low level signal may be a voltage signal of 0V.

Due to the fast response speed of the switch tube, the selection circuit 12 can be switched between the wireless charging mode and the audio playing mode quickly by using the circuit shown in fig. 7.

Alternatively, as shown in fig. 8, the audio playback circuit 14 includes an audio receiving circuit 1401 and a power amplifier 1402; the wearable device 10 establishes a wireless communication connection with the electronic apparatus 20.

The audio receiving circuit 1401 is configured to receive an audio signal from the electronic device 20 and demodulate the audio signal to obtain a demodulated audio signal;

the power amplifier 1402 amplifies the demodulated audio signal and outputs the amplified signal to the coil 11.

In this embodiment, after the wearable device 10 (e.g., a wireless headset) and the electronic apparatus 20 (e.g., a mobile phone) are successfully paired and a wireless communication connection (e.g., a bluetooth connection) is established, the electronic apparatus 20 may send a modulated audio signal to the wearable device 10, the audio receiving circuit 1401 receives the audio signal from the electronic apparatus 20 and demodulates the audio signal to obtain a demodulated audio signal, and the power amplifier 1402 amplifies the demodulated audio signal and outputs the amplified audio signal to the coil 11, so that the coil 11 emits sound.

Wherein, the coil can be the sound production of moving-iron formula, also can be the sound production of moving-coil formula, and this application embodiment does not limit.

Alternatively, as shown in fig. 9, the input terminal 131 of the wireless charging circuit 13 may include a first charging input terminal 1311 and a second charging input terminal 1312, wherein the first charging input terminal 1311 is connected to the first positive fixing terminal 1211, and the second charging input terminal 1312 is connected to the first negative fixing terminal 1212. The wireless charging circuit 13 includes a first rectifying circuit 1301, a first filter circuit 1302, and a battery 1303.

A first input end of the first rectifying circuit 1301 is connected with a first charging input end 1311, and a second input end of the first rectifying circuit 1301 is connected with a second charging input end 1312;

a first output end of the first rectifying circuit 1301 is connected with a first input end of the first filter circuit 1302, and a second output end of the first rectifying circuit 1301 is connected with a second input end of the first filter circuit 1302;

a first output terminal of the first filter circuit 1302 is connected to the positive electrode of the battery 1303, and a second output terminal of the first filter circuit 1302 is connected to the negative electrode of the battery 1303.

In this embodiment of the application, the first rectifying circuit 1301 is configured to convert an alternating current transmitted by the coil 11 into a direct current, and the first filter circuit 1302 is configured to convert a direct current output by the first rectifying circuit 1301 into a stable direct current and output the stable direct current to a battery for supplying power.

The battery 1303 is a rechargeable battery, such as a lithium battery.

Optionally, the first rectifying circuit 1301 includes a bridge rectifying circuit.

Optionally, the first filter circuit 1302 includes a capacitive filter circuit or an RC filter circuit.

The first controller 15 may be a Microprocessor (MCU), and may output a high level signal or a low level signal. The first controller 15 may control the selection circuit 12 to communicate the coil 11 with the wireless charging circuit 13, or control the selection circuit 12 to communicate the coil 11 with the audio playback circuit 14. The first controller 15 may store computer program instructions that may implement a control strategy for controlling when the selection circuit 12 communicates the coil 11 with the wireless charging circuit 13 and for controlling when the selection circuit 12 communicates the coil 11 with the audio playback circuit 14.

For example, when the first controller 15 detects that the wearable device 10 establishes a communication connection with the energy emitting apparatus 30, the control selection circuit 12 connects the coil 11 with the wireless charging circuit 13 and disconnects the coil 11 from the audio playback circuit 14, while notifying the electronic apparatus 20 to stop sending the audio signal to the wearable device 10.

When the first controller 15 detects that the battery 1303 is fully charged, the control selection circuit 12 connects the coil 11 to the audio playing circuit 14, disconnects the coil 11 from the wireless charging circuit 13, and simultaneously notifies the energy emitting device 30 to stop energy emission, and notifies the electronic device 20 that an audio signal can be sent to the wearable device 10.

Optionally, as shown in fig. 10, the multiplexing circuit further includes a detection circuit 16, and the detection circuit 16 is connected to the first controller 15;

the detection circuit 16 is configured to detect a charging current of the battery 1303, and send a current abnormality signal to the first controller 15 when the detection circuit detects that the charging current of the battery 1303 is greater than a preset current threshold;

the first controller 15 transmits a notification message for notifying the energy transmission device 30 of the suspension of the energy transmission to the energy transmission device 30 according to the current abnormality signal.

Optionally, the detection circuit 16 is further configured to detect whether the charging of the battery 1303 is completed, and send a charging completion signal to the first controller 15 when it is detected that the charging of the battery 1303 is completed;

the first controller 15 transmits a notification message to the energy transmission device 30 according to the charge completion signal.

Optionally, after the first controller 15 sends the notification message to the energy emitting device 30 according to the charging completion signal, a second notification message may be sent to the electronic device, and the second notification message is used to notify the electronic device 20 that an audio signal may be sent to the wearable apparatus 10.

In this embodiment, the detection circuit 16 may include a detection resistor and a voltage comparator, the detection resistor is connected in series to the charging loop of the battery 1303, the voltage comparator is configured to compare the voltage across the detection resistor with the reference voltage, and when it is detected that the voltage across the detection resistor is greater than the reference voltage, an abnormal current signal (e.g., a high level signal) is output to the first controller 15, so that the controller notifies the energy emitting device 30 to stop energy emission, and the protection may be automatically performed when the current is too large, so as to prevent the coil 11 from being burned out due to abnormal operation of the energy emitting device 30. Optionally, after the first controller 15 sends the notification message to the energy transmitting device 30 according to the current abnormal signal, the first controller 15 may further control the coil 11 to be disconnected from the wireless charging circuit 13, and after receiving the notification message that the energy transmitting device 30 works normally, the first controller 15 controls the coil 11 to be connected to the wireless charging circuit 13.

Referring to fig. 11, fig. 11 is a schematic structural diagram of another wearable device disclosed in the embodiment of the present application. As shown in fig. 11, the wearable device 10 includes a housing 200, a speaker assembly 300 and a multiplexing circuit 100, wherein the speaker assembly 300 includes a coil, a magnet and a diaphragm, the coil is connected to the diaphragm, and when a current is passed through the coil, the coil vibrates under the action of a magnetic field generated by the magnet to drive the diaphragm to sound; the speaker assembly 300 is fixedly disposed within the housing 200. The magnet can be a permanent magnet, and the material of the permanent magnet can be a ferrite permanent magnet material.

In this embodiment, if the wearable device 10 is a speaker assembly 300, which is based on the moving-coil sound-producing principle, when the multiplexing circuit works in the audio playing mode, after current flows through the coil (which may be a speaker coil), an acting force is generated between a magnetic field generated in the coil and a magnetic field generated in the magnet, so as to drive the diaphragm to produce sound.

Wherein, when the multiplexing circuit 100 operates in the wireless charging mode, the wearable device 10 receives the electromagnetic energy transmitted by the energy transmitting device 30 through the coil.

When the multiplexing circuit 100 operates in the audio playing mode, the wearable device 10 receives an audio signal sent by the electronic device 20, and drives the diaphragm to sound through the coil.

Alternatively, as shown in fig. 12, the energy transmission device 30 includes a second rectification circuit 31, a second filter circuit 32, a high-frequency inverter circuit 33, a transmission coil 34, and a second controller 35;

the second rectifying circuit 31 is used for converting alternating current into initial direct current voltage; the alternating current may be mains power (e.g., 220V, 50 Hz).

The second filter circuit 32 is used for changing the initial direct-current voltage into a stable direct-current voltage;

the high-frequency inverter circuit 33 is configured to convert the stable dc voltage into a high-frequency ac power (for example, with a frequency of 100K-200 KHz), and the high-frequency ac power is configured to drive the transmitting coil 34 to transmit electromagnetic energy;

the second controller 35 is connected to the high frequency inverter circuit 33, and the second controller 33 is configured to control whether the transmitting coil 34 transmits electromagnetic energy, and to control the amount of electromagnetic energy transmitted by the transmitting coil 34 when the transmitting coil 34 transmits electromagnetic energy.

A DC-DC voltage reduction circuit may be further added between the second filter circuit 32 and the high-frequency inverter circuit 33, and the DC-DC voltage reduction circuit is configured to convert a high DC voltage into a low DC voltage (e.g., 5V), so as to improve the stability of the energy emission device 30.

The principle of energy transfer between the transmitting coil of the energy transmitting device 30 and the speaker coil in the wearable device 10 is shown in fig. 13. When current is supplied to the transmitting coil, the magnetic field of the transmitting coil passes through the loudspeaker coil, and corresponding induced current is generated in the loudspeaker coil, so that energy transfer between the transmitting coil and the loudspeaker coil is realized.

Referring to fig. 14, fig. 14 is a flowchart illustrating a method for switching operating modes of a wearable device according to an embodiment of the present application, where the method is applied to the wearable device shown in fig. 11. As shown in fig. 14, the method includes the following steps.

The wearable device detects whether the coil of the wearable device generates an induced current 401. If yes, go to step 402, otherwise go to step 403.

402, the wearable device controls the wearable device to operate in a wireless charging mode.

And 403, the wearable device controls the wearable device to work in an audio playing mode.

In this embodiment, the wearable device may include a memory, and the memory may store program instructions for executing steps 401 to 403.

The wearable device may include a detection circuit to detect whether an induced current is generated in a coil of the wearable device.

Wherein, in step 401, the wearable device detects whether the coil of the wearable device generates an induced current, specifically:

the wearable device detects whether the current change frequency in a coil of the wearable device is within a preset charging frequency range, and if so, the coil is determined to generate an induced current; if not, determining that the coil does not generate induced current.

For example, the predetermined charging frequency range may be: 100 and 200 kilohertz (KHz).

Optionally, in order to improve the accuracy of the induced current determination, it may be further determined whether the current in the coil is greater than a preset current threshold, and when the current change frequency in the coil is within a preset charging frequency range and the current in the coil is greater than the preset current threshold, the current in the coil is determined to be the induced current.

Generally, when the coil receives an audio signal, the current change frequency in the coil is within a predetermined audio playback frequency range (e.g., 20-20 KHz). The preset charging frequency range is not overlapped with the preset audio playing frequency range.

In the embodiment of the application, whether wearable equipment is close to the energy transmitting device or not can be judged by detecting whether the coil of the wearable equipment generates induced current or not, so that whether the wearable equipment needs to be wirelessly charged or not is accurately judged, and therefore the switching of the working mode of the wearable equipment is achieved. The coil is used as a time division multiplexing coil, an audio playing function and a wireless charging function can be achieved through one coil, the coil used for wireless charging is not required to be additionally added in the wearable device, the space of the wearable device can be greatly saved, and therefore the space utilization rate of the wearable device is improved.

Embodiments of the present application also provide a computer storage medium storing a computer program for electronic data exchange, the computer program causing a wearable device to perform some or all of the steps of any of the methods as described in the above method embodiments, the wearable device comprising a wireless headset.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific implementation and application scope, and in view of the above, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A multiplexing circuit, characterized in that the multiplexing circuit is arranged on a wearable device, and the multiplexing circuit comprises: a coil, a selection circuit, an audio playback circuit, a wireless charging circuit and a first controller;

the coil is connected to the selection end of the selection circuit, the first fixed end of the selection circuit is connected to the input end of the wireless charging circuit; the second fixed end of the selection circuit is connected to the output end of the audio playback circuit; The output end of the first controller is connected to the control end of the selection circuit;

When the first controller controls the selection terminal of the selection circuit to communicate with the input terminal of the wireless charging circuit, the multiplexing circuit works in the wireless charging mode;

When the first controller controls the selection end of the selection circuit to communicate with the output end of the audio playback circuit, the multiplexing circuit works in the audio playback mode;

The multiplexing circuit further includes a detection circuit, which detects whether an induced current is generated in the coil of the wearable device;

The detection circuit detects whether an induced current is generated in the coil of the wearable device, specifically: the detection circuit detects whether the current changing frequency in the coil of the wearable device is within a preset charging frequency range, and if so, It is determined that the coil generates an induced current; if not, it is determined that the coil does not generate an induced current; the preset charging frequency range does not overlap with the preset audio playback frequency range, and the energy transmitting device is used to transmit energy to the wearable device to achieve wireless charging of the wearable device;

The first controller controls the multiplexing circuit to work in the wireless charging mode when an induced current is generated in the coil of the wearable device;

The first controller controls the multiplexing circuit to work in the audio playback mode under the condition that no induced current is generated in the coil of the wearable device;

the detection circuit is connected to the first controller;

The detection circuit is used to detect the charging current of the battery of the wireless charging circuit, and to send the current to the first controller when the detection circuit detects that the charging current of the battery is greater than a preset current threshold abnormal signal;

The first controller sends a notification message to the energy transmitting device according to the current abnormal signal, where the notification message is used to notify the energy transmitting device to suspend the energy transmitting.

2. The multiplexing circuit according to claim 1, wherein the selection terminal comprises a positive selection terminal and a negative selection terminal, the first fixed terminal comprises a first positive fixed terminal and a first negative fixed terminal, and the The second fixed end includes a second positive fixed end and a second negative fixed end; the coil includes a coil positive end and a coil negative end; the coil positive end is connected to the positive selection end, and the coil negative end is connected to the coil Negative selection terminal.

3. The multiplexing circuit according to claim 2, wherein the selection circuit comprises a double-pole double-throw switch, and the double-pole double-throw switch comprises a first movable contact, a second movable contact, a first Static contact, second static contact, third static contact and fourth static contact;

The positive selection end is connected to the first movable contact, the negative selection end is connected to the second movable contact, the first positive fixed end is connected to the first stationary contact, and the first negative fixed The second fixed end is connected to the second static contact, the second positive fixed end is connected to the third static contact, and the second negative fixed end is connected to the fourth static contact.

4. The multiplexing circuit according to claim 3, characterized in that,

The first controller to control the selection end of the selection circuit to communicate with the input end of the wireless charging circuit is specifically:

The first controller controls the first moving contact of the double-pole double-throw switch to connect to the first static contact, and controls the second moving contact of the double-pole double-throw switch to connect the Second static contact.

5. The multiplexing circuit according to claim 3, characterized in that,

The first controller controls the selection end of the selection circuit to communicate with the output end of the audio playback circuit as follows:

The first controller controls the first movable contact of the double-pole double-throw switch to connect to the third static contact, and controls the second moving contact of the double-pole double-throw switch to connect the Fourth static contact.

6 . The multiplexing circuit according to claim 2 , wherein the selection circuit comprises a first switch, a second switch, a third switch and a fourth switch, and the first controller comprises a first switch. 7 . an output terminal, a second output terminal, a third output terminal and a fourth output terminal;

The positive selection end is connected to the first end of the first switch tube and the first end of the second switch tube, the second end of the first switch tube is connected to the first positive fixed end, the first The second ends of the two switching tubes are connected to the second positive fixed end;

The negative selection end is connected to the first end of the third switch tube and the first end of the fourth switch tube, the second end of the third switch tube is connected to the first negative fixed end, and the first The second end of the four switch tubes is connected to the second negative fixed end;

The first output terminal is connected to the control terminal of the first switch tube, the second output terminal is connected to the control terminal of the second switch tube, and the third output terminal is connected to the control terminal of the third switch tube , the fourth output terminal is connected to the control terminal of the fourth switch tube.

7. The multiplexing circuit according to claim 6, wherein,

The first controller controls the first switch tube and the third switch tube to be turned on, and controls the second switch tube and the fourth switch tube to turn off.

8. The multiplexing circuit according to claim 6, wherein,

The first controller controls the first switch tube and the third switch tube to be turned off, and controls the second switch tube and the fourth switch tube to be turned on.

9. The multiplexing circuit according to any one of claims 2-8, wherein the audio playback circuit comprises an audio receiving circuit and a power amplifier; the wearable device establishes a wireless communication connection with an electronic device;

The audio receiving circuit is used for receiving an audio signal from the electronic device and demodulating the audio signal to obtain a demodulated audio signal;

The power amplifier is used for amplifying the demodulated audio signal and outputting it to the coil.

10. The multiplexing circuit according to any one of claims 2-8, wherein the input end of the wireless charging circuit comprises a first charging input end and a second charging input end, and the first charging input end The first positive fixed terminal is connected, and the second charging input terminal is connected to the first negative fixed terminal.

11. The multiplexing circuit according to claim 10, wherein the wireless charging circuit comprises a first rectifier circuit, a first filter circuit and a battery;

The first input end of the first rectifier circuit is connected to the first charging input end, and the second input end of the first rectifier circuit is connected to the second charging input end;

The first output end of the first rectifier circuit is connected to the first input end of the first filter circuit, and the second output end of the first rectifier circuit is connected to the second input end of the first filter circuit;

The first output end of the first filter circuit is connected to the positive electrode of the battery, and the second output end of the first filter circuit is connected to the negative electrode of the battery.

12. The multiplexing circuit according to claim 11, wherein the first rectifier circuit comprises a bridge rectifier circuit.

13. The multiplexing circuit according to claim 11 or 12, wherein the first filter circuit comprises a capacitor filter circuit or an RC filter circuit.

14. The multiplexing circuit according to any one of claims 1-8, 11, and 12, wherein the first controller comprises a microprocessor.

15 . The multiplexing circuit according to claim 1 , wherein the detection circuit is further configured to detect whether the battery is fully charged, and when it is detected that the battery is fully charged, send a message to the first controller. 16 . Charging complete signal;

The first controller sends the notification message to the energy transmitting device according to the charging completion signal.

16. A wearable device, comprising a housing, a speaker assembly and the multiplexing circuit according to any one of claims 1-15, the speaker assembly comprising a coil, a magnet and a diaphragm, the coil Connected to the diaphragm, when the coil passes current, the coil vibrates under the action of the magnetic field generated by the magnet, so as to drive the diaphragm to produce sound; the speaker assembly is fixedly arranged in the housing .

17 . The wearable device according to claim 16 , wherein when the multiplexing circuit operates in a wireless charging mode, the wearable device receives electromagnetic energy transmitted by the energy transmitting device through the coil. 18 .

18 . The wearable device according to claim 16 or 17 , wherein when the multiplexing circuit works in an audio playback mode, the wearable device receives an audio signal sent by an electronic device, and passes the audio signal through the coil. 19 . The diaphragm is driven to emit sound.

19. A method for switching a working mode of a wearable device, wherein the method is applied to the wearable device according to any one of claims 16-18, and the method comprises:

Detecting whether the coil of the wearable device generates an induced current;

If so, control the wearable device to work in a wireless charging mode;

If not, control the wearable device to work in the audio playback mode;

The detecting whether the coil of the wearable device generates an induced current includes:

Detect whether the current change frequency in the coil of the wearable device is within the preset charging frequency range, if so, determine that the coil generates an induced current; if not, determine that the coil does not generate an induced current; the preset charging frequency range and preset audio playback The frequency ranges do not overlap, and the energy transmitting device is used for transmitting energy to the wearable device, so as to realize wireless charging of the wearable device.