A wireless charging method and device, earphone box and storage medium

Abstract

Embodiments of the present application disclose a wireless charging method and device, an earphone box and a storage medium. The method is applied to an earphone box, and the earphone box comprises at least one near field communication (NFC) receiving coil. The method specifically comprises: if a distance between the earphone box and an electronic device meets a charging condition, selecting a target NFC receiving coil from the at least one NFC receiving coil of the earphone box; controlling the target NFC receiving coil to be in a charging signal receiving state, receiving a charging signal emitted by an NFC transmitting coil of the electronic device; and charging the earphone box or an earphone by using the charging signal. In this way, by arranging the NFC receiving coil, the electronic device with the NFC function can be used to reversely charge the earphone box or reversely charge the earphone, thereby providing a more convenient charging mode for the wireless earphone and enriching the charging mode of the wireless earphone.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless charging, in particular to a wireless charging method and device, earphone box and storage medium. BACKGROUND

[0002] Bluetooth earphones are a kind of device based on Bluetooth technology to transmit stereo signals, that is, left and right earphones can work independently without any wire connection by receiving stereo signals from a mobile phone or other playback devices through Bluetooth, and truly wireless can be achieved by single or double ear wearing. The existing Bluetooth earphones are generally placed in an earphone box for storage and charging, and the charging method is single. SUMMARY

[0003] The embodiments of the present application provide a wireless charging method, device, earphone box and storage medium, which can flexibly control multiple working modes of earphones.

[0004] The technical scheme of the embodiments of the present application is as follows:

[0005] In a first aspect, the embodiments of the present application provide a wireless charging method applied to an earphone box, wherein the earphone box comprises at least one near field communication (NFC) receiving coil; and the method comprises the following steps:

[0006] If the distance between the earphone box and an electronic device meets a charging condition, a target NFC receiving coil is selected from the at least one NFC receiving coil of the earphone box;

[0007] A control unit is configured to control the target NFC receiving coil to be in a charging signal receiving state and receive a charging signal emitted by an NFC transmitting coil of the electronic device;

[0008] The charging signal is used to charge the earphone box or earphones.

[0009] In a second aspect, the embodiments of the present application provide a wireless charging device applied to an earphone box, wherein the earphone box comprises at least one near field communication (NFC) receiving coil; and the device comprises the following units:

[0010] A selection unit is configured to select a target NFC receiving coil from the at least one NFC receiving coil of the earphone box if the distance between the earphone box and an electronic device meets a charging condition;

[0011] A control unit is configured to control the target NFC receiving coil to receive a charging signal emitted by an NFC transmitting coil of the electronic device;

[0012] A power management unit charges the earphone case or earphone with the charging signal.

[0013] In a third aspect, an earphone case is provided, which includes at least one near field communication (NFC) receiving coil; the earphone case further includes a processor and a memory configured to store a computer program capable of running on the processor,

[0014] The processor is configured to execute the steps of the method of the first aspect when the computer program is run.

[0015] In a fourth aspect, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to implement the steps of the method of the first aspect.

[0016] The embodiments of the present application provide a wireless charging method and device, earphone case and storage medium, the method is applied to an earphone case, the earphone case includes at least one near field communication (NFC) receiving coil; the method specifically includes: if the distance between the earphone case and an electronic device meets a charging condition, selecting a target NFC receiving coil from the at least one NFC receiving coil of the earphone case; controlling the target NFC receiving coil to be in a charging signal receiving state, receiving a charging signal emitted by an NFC transmitting coil of the electronic device; and charging the earphone case or earphone by using the charging signal. In this way, by arranging the NFC receiving coil, the electronic device with NFC function can be used to reversely charge the earphone case or reversely charge the earphone, so that a more convenient charging mode is provided for the wireless earphone, and the charging mode of the wireless earphone is enriched. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the NFC wireless charging framework structure;

[0018] Figure 2 It is a flowchart of the wireless charging method in the embodiments of the present application;

[0019] Figure 3 It is a first alternative structure schematic diagram of the earphone assembly provided in the embodiments of the present application;

[0020] Figure 4 It is a second alternative structure schematic diagram of the earphone assembly provided in the embodiments of the present application;

[0021] Figure 5 It is a timing diagram of NFC communication;

[0022] Figure 6 It is a first structure schematic diagram of the earphone case provided in the embodiments of the present application;

[0023] Figure 7 This is a schematic diagram of the second structure of the earphone case provided in an embodiment of this application;

[0024] Figure 8 A third structural schematic diagram of the earphone case provided in an embodiment of this application;

[0025] Figure 9 This is a schematic diagram of the NFC receiving coil in an embodiment of this application;

[0026] Figure 10 A fourth structural schematic diagram of the earphone case provided in an embodiment of this application;

[0027] Figure 11 This is a schematic diagram of the composition structure of the wireless charging device provided in the embodiments of this application. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments provided herein are merely illustrative and not intended to limit the invention. Furthermore, the embodiments provided below are partial embodiments for implementing the present invention, not all embodiments for implementing the present invention. Unless otherwise specified, the technical solutions described in the embodiments of the present invention can be implemented in any combination.

[0029] Before introducing the wireless charging method of this application, let's first introduce NFC wireless charging. NFC charging can be divided into two parts: the transmitter (Poller) and the receiver (Listener), as follows... Figure 1 As shown, the transmitter at the sending end acts as the energy output terminal, transmitting communication data and energy to the receiving end via the NFC transmitting coil. The receiving end comprises a power management unit and a communication unit. The power management unit is primarily responsible for managing the voltage and current after rectification or external rectification, as well as the battery charging status. The communication unit is mainly responsible for negotiating wireless charging with the transmitter via the NFC coil. The power management unit and the communication unit operate in parallel without mutual communication; both communicate with the processor via the I2C bus, acting as slave units.

[0030] The application utilizes NFC wireless charging to realize the charging function of wireless earphones. Since the sending end can be directly built into an electronic device and can be compatible with the existing NFC of the electronic device (i.e. the electronic device with NFC function can charge the Bluetooth earphone), for the entire NFC wireless charging, the design of the coil is particularly important. For the sending end, because the space of the electronic device is often large enough, the NFC sending coil can be directly placed in the electronic device. For the receiving end, it can be directly placed on the wireless earphone side. However, considering the small size of the earphone and the independence of the two earphones, the NFC receiving coil is placed in the earphone box in the embodiment of the application.

[0031] The embodiment of the application provides a wireless charging method applied to an earphone box.

[0032] Figure 2 The flowchart of the wireless charging method in the embodiment of the application is shown in Figure 2 The method can specifically include the following steps.

[0033] Step 101: When it is detected that the charging condition is met, a target NFC receiving coil is selected from at least one near field communication (NFC) receiving coil of the earphone box.

[0034] First, the earphone box in the embodiment of the application is exemplified. Figure 3 The first optional structure diagram of the earphone assembly provided by the embodiment of the application is shown in Figure 3 The earphone assembly 20 includes an earphone 21 and an earphone box 22. The earphone 21 includes a first earphone 21-1 (i.e. a left earphone) and a second earphone 21-2 (i.e. a right earphone). When the earphone needs to be stored in the earphone box 22, the cover of the earphone box 22 is opened, and the earphone 21 is placed in the corresponding position in the accommodation groove for storage. The earphone box can also charge the earphone. The charging can be contact charging or wireless charging. Of course, the earphone in the application generally refers to a wireless earphone, which can be a TWS earphone or a single earphone, such as a single Bluetooth earphone.

[0035] Figure 4 The second optional structure diagram of the earphone assembly provided by the embodiment of the application is shown in Figure 4 The earphone box 22 is further provided with an accommodation groove 221 for accommodating the earphone 21. The groove wall of the accommodation groove 221 is provided with a second connecting part 222 electrically connected with the power supply module. The power supply module charges the earphone 21 through the second connecting part 222 and the first connecting part 211 when the first connecting part 211 of the earphone 21 contacts with the second connecting part 222. The shape of the accommodation groove can correspond to the shape of the earphone, so that the earphone is correspondingly embedded in the accommodation groove.

[0036] In an example, the earphone case 22 includes six outer surfaces, including an upper surface, a lower surface, and four side surfaces (may also be referred to as surfaces). Among them, the upper surface is a curved surface, and the four side surfaces and the lower surface are planar surfaces.

[0037] In actual applications, the at least one NFC receiving coil is arranged on at least one surface of the earphone case respectively. For example, the NFC receiving coil can be arranged on Figure 3 The upper surface, the lower surface, the left side surface, the right side surface, the front side surface, and the rear side surface of the earphone case 22. Considering that the NFC receiving coil needs to occupy sufficient space, the NFC receiving coil is preferably arranged on the upper surface and the lower surface.

[0038] In the embodiments of the present application, the shape of the earphone case and the number of included outer surfaces are not limited. In an example, the earphone case is a cube including six outer surfaces. In an example, the earphone case is a cylinder including three outer surfaces.

[0039] Optionally, the outer surface of the earphone case includes a planar surface. Optionally, the outer surface of the earphone case includes a planar surface and a curved surface.

[0040] Here, a target NFC receiving coil is selected from the at least one near field communication NFC receiving coil of the earphone case, which can determine which surface of the earphone case the electronic device is closer to by detecting the relative position relationship between the electronic device and the earphone case. The NFC receiving coil located close to the surface can better receive the charging signal and has a higher charging efficiency.

[0041] It should be noted that when using the NFC function of the electronic device to wirelessly charge the earphone case or the earphone in the earphone case, due to the limitation of NFC communication, the distance between the earphone case and the electronic device must be less than the distance threshold specified by NFC communication, and the two can communicate through NFC to realize wireless charging. Therefore, the charging condition is used as a judgment standard for the electronic device to charge the earphone case or the earphone, and the charging condition can be that the magnetic field strength detected by the NFC receiving coil is greater than the strength threshold and the duration is greater than the preset duration. The surrounding magnetic field strength detected by the NFC receiving coil represents the distance between the earphone case and the electronic device. The charging condition can also be that the distance sensor detects that the distance between the earphone case and the electronic device is less than the distance threshold, and the duration is greater than the preset duration.

[0042] In some embodiments, the target NFC receiving coil is selected from the at least one near field communication NFC receiving coil of the earphone case, including: detecting the relative position relationship between the electronic device and the earphone case; based on the relative position relationship, selecting the NFC receiving coil closest to the electronic device as the target NFC receiving coil.

[0043] Specifically, detecting the relative positional relationship between the electronic device and the earphone case includes: controlling the at least one NFC receiving coil to be in the receiving state sequentially and individually, receiving the charging signal received by each NFC receiving coil; determining the relative distance between each NFC receiving coil and the electronic device based on the strength of the charging signal received by each NFC receiving coil; wherein, a higher charging signal strength indicates that the distance between the NFC receiving coil and the electronic device is closer.

[0044] It should be noted that if all NFC receiving coils are in receiving mode at the same time, they will inevitably affect each other. Therefore, by controlling at least one NFC receiving coil to be in receiving mode individually in sequence, the strength of the charging signal received by each NFC can be detected more accurately.

[0045] In some embodiments, during the idle state specified in the communication protocol, the at least one NFC receiving coil is controlled to be in the receiving state sequentially and individually.

[0046] It should be noted that when the headphones and electronic device enter NFC communication range, they will immediately interact with the e-reader's NFC to exchange charging protocol information and begin normal charging. During the charging process, the NFC communication between the headphones and the electronic device is periodic, such as... Figure 5 As shown, the high-level (1) period is during the communication protocol negotiation. During this period, the NFC coils (including the NFC receiving coil and the NFC transmitting coil) must maintain a good connection, so it is not possible to verify which side of the coil the electronic device is closest to at this time. After the communication protocol negotiation is completed, Figure 5 During the low level (0) period, at least one NFC receiving coil is controlled to be in the receiving state in turn. If the strength of the charging signal received by a certain NFC receiving coil is greater than the first strength threshold, then the NFC receiving coil is used as the target NFC receiving coil. The strength of the charging signal received by other NFC receiving coils is less than the second strength threshold. The first strength threshold is much greater than the second strength threshold.

[0047] Step 102: Control the target NFC receiving coil to be in a charging signal receiving state, and receive the charging signal emitted by the NFC transmitting coil of the electronic device;

[0048] In some embodiments, the method further includes: controlling the remaining NFC receiving coils in the at least one NFC receiving coil to be in a charging signal shielding state.

[0049] In other embodiments, when the charging condition is detected, the remaining NFC receiving coil is controlled to reset to the charging signal receiving state.

[0050] It should be noted that since the NFC receiving coil in the shielding state cannot sense the surrounding magnetic field, when the electronic device leaves, in order to ensure that the next time the electronic device approaches, it can be detected in time and accurately, the NFC receiving coil in the shielding state needs to be reset to the receiving state.

[0051] Here, the charging signal receiving state can be understood as connecting the charging coil to the charging circuit to form a closed loop to sense the surrounding magnetic field to obtain the charging signal, and the charging signal is converted by the charging circuit to obtain the charging current of the earphone box or earphone. The charging signal shielding state can be understood as disconnecting the charging coil from the charging circuit, and the NFC receiving coil cannot form a closed loop to sense the surrounding magnetic field.

[0052] It should be noted that if all NFC receiving coils are in the receiving state at the same time, there will be mutual influence, so when controlling the target NFC receiving coil to be in the charging signal receiving state, the remaining NFC receiving coils need to be controlled to be in the charging signal shielding state to ensure the charging signal receiving effect of the target NFC receiving coil.

[0053] In actual application, the NFC receiving coil can be connected to the charging circuit through a switch assembly.

[0054] In some embodiments, the earphone box is further provided with at least one control switch; the at least one NFC receiving coil is connected to the charging circuit through the at least one control switch;

[0055] The method comprises: controlling the first NFC receiving coil to be in the receiving state when the first control switch connected to the first NFC receiving coil is in the closed state; controlling the first NFC receiving coil to be in the shielding state when the first control switch connected to the first NFC receiving coil is in the open state; wherein the first NFC receiving coil is any one of the at least one NFC receiving coil, and the first control switch is any one of the at least one control switch.

[0056] It should be noted that by controlling the control switch connected to the target NFC receiving coil to be in the closed state and the other control switches to be in the closed state, the purpose of selecting the target NFC receiving coil is achieved.

[0057] In actual application, the control switch can be a common single-pole single-throw switch, one end of the single-pole single-throw switch is connected to one end of the NFC receiving coil, and the other end is connected to one end of the NFC controller.

[0058] Step 103: charging the earphone box or earphone by using the charging signal.

[0059] That is, the wireless charging method provided by the embodiments of the present application can first charge the earphone box, and then charge the earphones placed in the earphone box by the earphone box, and secondly can directly charge the earphones. The second method has a shorter charging time for the earphones than the first method.

[0060] Specifically, the charging of the earphone box or the earphones by the charging signal includes: when the earphones are detected to be placed in the earphone box, charging the earphones by the charging signal; and when the earphones are detected not to be placed in the earphone box, charging the earphone box by the charging signal.

[0061] In some embodiments, after the charging of the earphones by the charging signal when the earphones are detected to be placed in the earphone box, the method further includes: when the earphones are detected to be taken out of the earphone box, continuing to charge the earphone box by the charging signal; or when the earphones are detected to be fully charged, continuing to charge the earphone box by the charging signal.

[0062] That is, the earphones are preferably charged first, and then the earphone box is charged when the earphones are fully charged or when the earphones are taken out.

[0063] In some embodiments, the earphone box is further provided with a selection switch group; when the selection switch group is controlled to be in a first open and close state, the left earphone is charged by the charging signal received by the target NFC receiving coil; when the selection switch group is controlled to be in a second open and close state, the right earphone is charged by the charging signal received by the target NFC receiving coil; when the selection switch group is controlled to be in a third open and close state, the left earphone and the right earphone are charged by the charging signal received by the target NFC receiving coil; and when the selection switch group is controlled to be in a fourth open and close state, the earphone box is charged by the charging signal received by the target NFC receiving coil.

[0064] That is, the selection switch group is used to select the charging object. Here, the charging object is one of the left earphone, the right earphone, the left earphone and the right earphone, and the earphone box.

[0065] In practical applications, the selection switch group includes at least one selection switch, and the selection switch can be a single-pole single-throw switch or a single-pole multi-throw switch.

[0066] Specifically, the selection switch group can include a first selection switch, a second selection switch, and a third selection switch; the left earphone is connected to the charging circuit through the first selection switch, the right earphone is connected to the charging circuit through the second selection switch, and the earphone box is connected to the charging circuit through the third selection switch.

[0067] When it is detected that the earphone is placed in the earphone box, the first selection switch and / or the second selection switch is controlled to be in a closed state, other selection switches are controlled to be in an open state, and the left earphone and / or the right earphone is charged by using the charging signal.

[0068] When it is detected that the earphone is not placed in the earphone box, the third selection switch is controlled to be in a closed state, and other selection switches are controlled to be in an open state, and the earphone box is charged by using the charging signal.

[0069] It can be understood that the first open-close state is that the first selection switch is in a closed state, and the second selection switch and the third selection switch are in an open state; the second open-close state is that the second selection switch is in a closed state, and the first selection switch and the third selection switch are in an open state; the third open-close state is that the first selection switch and the second selection switch are in a closed state, and the third selection switch is in an open state; and the fourth open-close state is that the first selection switch and the second selection switch are in an open state, and the third selection switch is in a closed state.

[0070] In some embodiments, a material for concentrating magnetic flux can be further arranged on each NFC coil to ensure that the Q value of the NFC receiving coil is as high as possible.

[0071] Specifically, the earphone box has one NFC coil on each of the front surface and the back surface, and the two coils are connected to the side surface of the earphone box and are uniformly connected to the NFC controller. Considering the influence of the coils and the internal environment, an iron oxide is attached to the inner side of each NFC receiving coil to concentrate magnetic flux and ensure that the Q value of the two coils is as high as possible, thereby realizing the function of wireless charging on different surfaces of the earphone box.

[0072] Figure 6 to Figure 8 FIG. 1 is a structural schematic diagram of an earphone box in an embodiment of the present application. Figure 6 As shown in FIG. 1, the NFC receiving coil can be located on the front surface of the earphone box. Figure 7 As shown in FIG. 1, the NFC receiving coil can be located on the side surface of the earphone box. Figure 8 As shown in FIG. 1, the NFC receiving coil can be located on the back surface of the earphone box. The earphone box can include one or more NFC receiving coils.

[0073] Figure 9 FIG. 2 is a structural schematic diagram of an NFC receiving coil in an embodiment of the present application. Figure 9 As shown in FIG. 2, the NFC receiving coil includes five turns, and an iron oxide is attached to the inner side of the NFC receiving coil (the shaded area in FIG. 2). Figure 9 In actual application, the number of turns of the NFC receiving coil can be flexibly set according to actual needs, which is not specifically limited in the embodiment of the present application.

[0074] By means of the above technical scheme, the earphone box can be reversely charged by an electronic device with NFC function or the earphone can be reversely charged by the electronic device, so that a more convenient charging mode is provided for the wireless earphone, and the charging mode of the wireless earphone is enriched.

[0075] The charging circuit of the earphone box of the embodiment of the application is further described on the basis of the above embodiment. Figure 10 A fourth structural diagram of the earphone box provided by the embodiment of the application is shown in Figure 10 The earphone box includes a charging circuit, two NFC receiving coils, three control switches and a selection switch group.

[0076] Before the wireless charging method provided by the embodiment of the application is introduced, the structure of the earphone box is exemplarily described.

[0077] One NFC controller is connected with two NFC receiving coils at the same time, and one power management chip (PMIC) is connected with the two NFC receiving coils through a rectifier circuit at the same time. At this time, switch2 (the first control switch) and switch3 (the second control switch) are in the closed state. When the mobile phone NFC coil is close to any one of the two coils, the NFC controller can immediately detect it and can immediately communicate, and the PMIC can immediately obtain the rectified energy and select to charge the earphone box or the earphone battery.

[0078] The specific working logic is as follows:

[0079] 1. In the default state, switch2 and switch3 are in the closed state, at this time, the NFC controller is connected with the two coils at the same time.

[0080] 2. When the electronic device NFC is turned on to generate an RF field and is close to any coil, the NFC controller can immediately detect it and then notify the processor, but the processor does not know which side of the coil the electronic device is close to. At this time, if the processor does not control switch2 and switch3, the earphone box Listener end NFC controller can normally communicate with the electronic device Poller end NFC, and the PMIC can also normally obtain the charging energy, but because there will be an influence between the two coils, the coil conversion efficiency will be reduced at this time, that is, the charging speed will be reduced.

[0081] 3. Therefore, after the processor receives the notification of the NFC controller, it will immediately interact with the electronic device NFC in the charging protocol and start normal charging. During the charging process, the communication between the earphone box and the electronic device NFC is periodic, as shown in Figure 5The high level time is shown, and the NFC coil must ensure the connection during the communication protocol negotiation, so the electronic device cannot be verified to be close to which side coil at this time. After the communication protocol negotiation is completed, the processor controls switch2 and switch3 in turn, first disconnects switch2, and if it is detected that the RF field still exists, it is proved that the electronic device is close to the opposite coil. The switch2 is kept off, and the switch3 is closed until the charging is completed. If switch2 is disconnected, the RF field is greatly weakened or even disappears, which proves that the electronic device is close to the front coil, so switch2 needs to be closed immediately, and switch3 is disconnected until the charging is completed.

[0082] 4、At the same time, if the processor receives a start charging notification, the processor needs to detect whether the Bluetooth earphone is in the earphone box at this time. If it is, it is detected whether the earphone power is full. If it is full, the switch is controlled to charge the earphone box battery. If it is not full, the Bluetooth earphone is first charged. Until the Bluetooth battery is full, switch to the earphone box battery charging. When both are fully charged, the electronic device end stops charging through the NFC controller. In addition, during the charging process, the charging power can be switched according to the power of the earphone and the earphone box. After confirming which side coil the electronic device is close to and adjusting the on-off of the switch, the charging speed will change. If the change of the charging power is not controlled, it may affect the service life of the battery. For example, low power is charged with small power, medium power is charged with large power constant current, and high power is charged with small power.

[0083] 5、If the Bluetooth earphone is not in the earphone box, the earphone box battery is directly charged. Here, switch1 (selection switch group) can be used to select the charging object.

[0084] 6、After the electronic device NFC leaves the Bluetooth earphone box, the processor needs to control swtich2 and swtich3 to reset and keep closed to ensure that the electronic device can be detected in the first time next time.

[0085] It should be noted that the electronic device can be a smart phone, a personal computer, a notebook computer, a tablet computer, a portable wearable device, a portable charging device, etc.

[0086] The wireless charging method provided by the embodiment of the application can use the NFC function of the electronic device, so that any electronic device with NFC function can charge the earphone box or the earphone at any time and anywhere, and a multi-coil system is designed to select a coil with better position to receive the charging signal and improve the charging efficiency.

[0087] In the embodiment of the application, a wireless charging device is also provided, which is applied to an earphone box. The earphone box includes at least one near field communication (NFC) receiving coil.Figure 11 The apparatus includes:

[0088] The selecting unit 1101 is configured to select a target NFC receiving coil from at least one NFC receiving coil of the earphone box when a charging condition is detected.

[0089] The control unit 1102 is configured to control the target NFC receiving coil to receive a charging signal transmitted by an NFC transmitting coil of the electronic device.

[0090] The power management unit 1103 is configured to charge the earphone box or the earphone by using the charging signal.

[0091] In some embodiments, the selecting unit 1101 is specifically configured to detect a relative position relationship between the electronic device and the earphone box, and select an NFC receiving coil closest to the electronic device as the target NFC receiving coil based on the relative position relationship.

[0092] In some embodiments, the selecting unit 1101 is specifically configured to control the at least one NFC receiving coil to be in the receiving state one by one, receive a charging signal received by each NFC receiving coil, and determine a relative distance between each NFC receiving coil and the electronic device based on a charging signal strength of each NFC receiving coil. The higher the charging signal strength is, the closer the distance between the NFC receiving coil and the electronic device is.

[0093] In some embodiments, the selecting unit 1101 is specifically configured to control the at least one NFC receiving coil to be in the receiving state one by one in an idle state specified by a communication protocol.

[0094] In some embodiments, when the earphone box includes at least two NFC receiving coils, the control unit 1102 is specifically configured to control the target NFC receiving coil to be in a charging signal receiving state, and control the remaining NFC receiving coils in the at least one NFC receiving coil to be in a charging signal shielding state.

[0095] In some embodiments, the earphone box is further provided with at least one control switch, and the at least one NFC receiving coil is connected to a charging circuit through the at least one control switch.

[0096] The control unit 1102 is specifically configured to control the first NFC receiving coil to be in the receiving state when a first control switch connected to the first NFC receiving coil is in a closed state; and control the first NFC receiving coil to be in the shielding state when the first control switch connected to the first NFC receiving coil is in an open state; wherein the first NFC receiving coil is any one of the few NFC receiving coils, and the first control switch is any one of the at least one control switch.

[0097] In some embodiments, the control unit 1102 is further configured to control the remaining NFC receiving coil to reset to the charging signal receiving state when it is detected that the charging condition is not met.

[0098] In some embodiments, the power management unit 1103 is configured to charge the earphone using the charging signal when it is detected that the earphone is placed in the earphone box; and charge the earphone box using the charging signal when it is detected that the earphone is not placed in the earphone box.

[0099] In some embodiments, the power management unit 1103 is further configured to continue to charge the earphone box using the charging signal when it is detected that the earphone leaves the earphone box; or continue to charge the earphone box using the charging signal when it is detected that the earphone is fully charged.

[0100] In some embodiments, the earphone box further comprises a selection switch group; and the selection switch group is configured to charge the left earphone using the charging signal received by the target NFC receiving coil when the selection switch group is in a first open and close state; charge the right earphone using the charging signal received by the target NFC receiving coil when the selection switch group is in a second open and close state; charge the left earphone and the right earphone using the charging signal received by the target NFC receiving coil when the selection switch group is in a third open and close state; and charge the earphone box using the charging signal received by the target NFC receiving coil when the selection switch group is in a fourth open and close state.

[0101] In some embodiments, an iron oxide is attached to the inside of each NFC receiving coil.

[0102] In some embodiments, the at least one NFC receiving coil is arranged on at least one surface of the earphone box.

[0103] The embodiments of the present application also provide an earphone box, which comprises at least one near field communication (NFC) receiving coil; and the earphone box further comprises a processor and a memory configured to store a computer program capable of running on the processor,

[0104] Of course, in actual application, each component in the device is coupled together through a bus system. It can be understood that the bus system is used to realize the connection communication between the components. In addition to the data bus, the bus system also includes a power bus, a control bus and a state signal bus.

[0105] In actual application, the earphone box further includes an NFC controller, a power management chip and a rectifier circuit.

[0106] The embodiments of the present application further provide a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the steps of the method according to any one of the above embodiments.

[0107] In actual application, the processor can be at least one of a microcontroller unit (MCU), an application specific integrated circuit (ASIC), a digital signal processing device (DSPD), a programmable logic device (PLD), a field-programmable gate array (FPGA), a controller, a microcontroller, and a microprocessor. It can be understood that, for different devices, the electronic device used to implement the function of the processor can also be other devices, and the embodiments of the present application are not limited in this regard.

[0108] The memory can be a volatile memory (such as a random-access memory (RAM)), a non-volatile memory (such as a read-only memory (ROM), a flash memory, a hard disk (HDD) or a solid-state disk (SSD)), or a combination of the above types of memories, and provides instructions and data to the processor.

[0109] It should be noted that "first", "second", and the like are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence.

[0110] The methods disclosed in the several method embodiments provided by the present application can be combined arbitrarily without conflict to obtain new method embodiments.

[0111] The features disclosed by the several product embodiments provided by the present application can be arbitrarily combined, without conflict, to obtain new product embodiments.

[0112] The features disclosed by the several method or device embodiments provided by the present application can be arbitrarily combined, without conflict, to obtain new method embodiments or device embodiments.

[0113] The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wireless charging method applied to an earphone case, characterized in that, The earphone box comprises at least one near field communication (NFC) receiving coil; the method comprises: selecting a target NFC receiving coil from the at least one NFC receiving coil of the earphone box when a charging condition is detected to be met; controlling the target NFC receiving coil to be in a charging signal receiving state to receive a charging signal transmitted by an NFC transmitting coil of an electronic device; charging the earphone box or the earphone by using the charging signal; The method further comprises: controlling the remaining NFC receiving coils to reset to the charging signal receiving state when the charging condition is detected to be not met.

2. The method of claim 1, wherein, The method further comprises: detecting that the earphone is placed in the earphone box, and charging the earphone by using the charging signal; detecting that the earphone is not placed in the earphone box, and charging the earphone box by using the charging signal. The method further comprises: detecting that the earphone leaves the earphone box, and continuing to charge the earphone box by using the charging signal; 3. The method of claim 1, wherein, or, detecting that the earphone is fully charged, and continuing to charge the earphone box by using the charging signal. ​ 4. The method of claim 1, wherein, ​ ​ ​ 5. The method of claim 4, wherein, ​ ​ ​ 6. The method of claim 4, wherein, The earphone box is further provided with a selection switch group, which is used for selecting a charging object for a charging circuit; The earphone box is further provided with a selection switch group, which is used for selecting a charging object for a charging circuit; The earphone box is further provided with a selection switch group, which is used for selecting a charging object for a charging circuit; The earphone box is further provided with a selection switch group, which is used for selecting a charging object for a charging circuit; The earphone box is further provided with a selection switch group, which is used for selecting a charging object for a charging circuit; The earphone box is further provided with a selection switch group, which is used for selecting a charging object for a charging circuit; 7. The method according to any one of claims 1 to 6, characterized in that, The earphone box is further provided with a selection switch group, which is used for selecting a charging object for a charging circuit; 8. The method according to any one of claims 1 to 6, characterized in that, The earphone box is further provided with a selection switch group, which is used for selecting a charging object for a charging circuit. 9.A wireless charging device applied to an earphone box, characterized in that, An inner side of each NFC receiving coil is attached with a ferrite. The at least one NFC receiving coil is arranged on at least one surface of the earphone box. The earphone box includes at least one near field communication (NFC) receiving coil; and the device includes: a selection unit configured to select a target NFC receiving coil from the at least one NFC receiving coil when a charging condition is met; a control unit configured to control the target NFC receiving coil to be in a charging signal receiving state to receive a charging signal transmitted by an NFC transmitting coil of an electronic device; a power management unit configured to charge the earphone box or the earphone by using the charging signal; 10. An earphone case, characterized by, The selection unit is specifically configured to control the at least one NFC receiving coil to be in a receiving state one by one in an idle state specified by a communication protocol, receive a charging signal received by each NFC receiving coil, determine a relative distance between each NFC receiving coil and the electronic device based on a charging signal strength of each NFC receiving coil, and select an NFC receiving coil closest to the electronic device as the target NFC receiving coil based on the relative distance, wherein a higher charging signal strength represents a shorter distance between the NFC receiving coil and the electronic device. When the earphone box includes at least two NFC receiving coils, after the target NFC receiving coil is selected from the at least one NFC receiving coil, the control unit is further configured to control the target NFC receiving coil to be in the charging signal receiving state and control remaining NFC receiving coils in the at least one NFC receiving coil to be in a charging signal shielding state. The earphone box includes at least one near field communication (NFC) receiving coil; 11. A computer readable storage medium having stored thereon a computer program, characterized in that The earphone box further includes a processor and a memory configured to store a computer program capable of running on the processor, When the processor is configured to run the computer program, the processor performs the steps of the method of any one of claims 1 to 8. The computer program is executed by the processor to implement the steps of the method of any one of claims 1 to 8.

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