Near field communication method, near field communication circuit and electronic equipment

Abstract

The invention discloses a near field communication method, a near field communication circuit and electronic equipment, and the method comprises the steps: enabling a coil to receive a near field communication signal transmitted by a near field communication transmitter, and detecting the induced magnetic flux and induction current under the condition of receiving the near field communication signal; the near field communication chip determines the signal intensity of the near field communication signal according to the induction current induced by the coils, and determines a target coil from the plurality of coils according to the signal intensity and / or the magnetic flux induced by the coils; and performing data communication with the near field communication transmitter through the target coil. In this way, the problem that in the prior art, due to the fact that a user cannot completely align the coil of the terminal to the coil of the radio frequency device, the coupling energy of the coil is too low under the condition that the offset of the coil is too large, and the card swiping success rate is low can be solved.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a near field communication method, a near field communication circuit and an electronic device. Background Art

[0002] With the development of mobile communication technology, most of the current smart phones are equipped with NFC (Near Field Communication) function, which is often used in multiple scenarios such as electronic payment, identity authentication, ticketing, data exchange, anti-counterfeiting, advertising, etc. In the prior art, when NFC communication is started, the NFC driving circuit drives the NFC coil to send and receive high-frequency magnetic field signals, that is, the NFC coil completes the interaction of NFC signals.

[0003] In the process of implementing this application, the inventors found that there are at least the following problems in the prior art: the positions of different models vary greatly, and users are usually not clear about the position of the NFC antenna of the model they are using. In addition, in different scenarios, the shape of the card reader carrier is different and the position of the card reader is not conspicuous, making it difficult for users to accurately find the card swiping position and align it with the NFC coil of the NFC device. At the same time, as a near-field communication technology, the transmission power and characteristics will weaken as the distance between the two communicating NFC devices increases or they are misaligned. Alignment is required for successful card swiping. If the user does not align the position, near-field communication will fail, resulting in a low card swiping success rate. Summary of the invention

[0004] The present application aims to provide a near field communication method, a near field communication circuit and an electronic device, which can solve the problem in the prior art that the user cannot completely align the terminal's own coil with the coil of the RF device, resulting in too low coupling energy of the coil when the coil offset is too large, resulting in a low card swiping success rate.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application proposes a near field communication method, which is applied to a near field communication circuit, wherein the near field communication circuit includes a near field communication chip and a phased array coil; the phased array coil includes a plurality of coils; the near field communication chip is connected to the plurality of coils respectively through connecting wires; the method includes:

[0007] The coil receives a near field communication signal sent by a near field communication transmitter, and detects an induced magnetic flux and an induced current when the near field communication signal is received;

[0008] The near field communication chip determines the signal strength of the near field communication signal according to the induced current induced by the coil, and determines the target coil from the multiple coils according to the signal strength and / or the magnetic flux induced by the coil;

[0009] Data communication is performed with the near field communication transmitter via the target coil.

[0010] In a second aspect, an embodiment of the present application provides a near field communication circuit, which is applied to an electronic device, and includes a near field communication chip and a phased array coil; the phased array coil includes a plurality of coils; the near field communication chip is connected to the plurality of coils respectively through connecting wires;

[0011] The coil is used to receive a near field communication signal sent by a near field communication transmitter, and to detect an induced magnetic flux and an induced current when the near field communication signal is received;

[0012] The near field communication chip is used to determine the signal strength of the near field communication signal according to the induced current induced by the coil, and to determine the target coil from the multiple coils according to the signal strength and / or the magnetic flux induced by the coil;

[0013] The near field communication circuit is used to perform data communication with the near field communication transmitter through the target coil.

[0014] In a third aspect, an embodiment of the present application provides an electronic device, wherein the electronic device includes the near field communication circuit described in the second aspect of the present application.

[0015] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0016] The near field communication method disclosed in the present disclosure is applied to a near field communication circuit, wherein the near field communication circuit includes a near field communication chip and a phased array coil; the phased array coil includes a plurality of coils; the near field communication chip is respectively connected to the plurality of coils through a connecting line; the near field communication signal sent by the near field communication transmitter is received through the coil, and the induced magnetic flux and induced current are detected when the near field communication signal is received; the near field communication chip determines the signal strength of the near field communication signal according to the induced current induced by the coil, and determines the target coil from the plurality of coils according to the signal strength and / or the magnetic flux induced by the coil; and data communication is performed with the near field communication transmitter through the target coil. In this way, the offset of the coil can be reduced by adjusting the number and phase of the coils of the near field communication, so that the radiation direction of the coil of the electronic device matches the signal of the near field communication transmitter, and the coupling energy of the coil can be enhanced, thereby improving the success rate of card swiping.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a schematic diagram of a coil setting provided by the background technology of this application;

[0020] Figure 2 is a block diagram of a near field communication system provided by an embodiment of the present application;

[0021] Figure 3 is a flow chart of a near field communication method provided by an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of a near field communication circuit provided in an embodiment of the present application;

[0023] Figure 5 is a flow chart of data communication provided by an embodiment of the present application;

[0024] Figure 6 is a flowchart of another data communication provided by an embodiment of the present application;

[0025] Figure 7 is a flow chart of a method for performing near field communication using a near field communication circuit provided in an embodiment of the present application;

[0026] Figure 8 is a structural diagram of a near field communication circuit provided in an embodiment of the present application;

[0027] Fig. 9 is a block diagram of a near field communication device provided in an embodiment of the present application;

[0028] Fig.10 is a block diagram of an electronic device provided in an embodiment of the present application;

[0029] Fig.11 is a block diagram of another electronic device provided in an embodiment of the present application;

[0030] Fig.12 A schematic diagram of the hardware structure of another electronic device to implement an embodiment of the present application. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] The embodiments of the present invention will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] The term "first" or "second" in the specification and claims of the present application may include one or more of the features explicitly or implicitly. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Before introducing the near field communication method, near field communication circuit and electronic device provided by the present disclosure, the application scenarios involved in each embodiment of the present disclosure can be introduced first. The present disclosure can be applied to the scenario where a user uses the NFC communication function of a smart terminal to swipe a card, and the near field communication method provided by the embodiment of the present disclosure can be applied to electronic devices with NFC function.

[0036] At present, with the development of mobile communication technology, most of the current smart phones are equipped with NFC functions, which are often used in multiple scenarios such as electronic payment, identity authentication, ticketing, data exchange, anti-counterfeiting, and advertising. Among them, NFC is a relatively mature near-field communication technology. Near-field communication, also known as short-range wireless communication, is a short-range high-frequency wireless communication technology that allows non-contact point-to-point data transmission and exchange between electronic devices. In the prior art, when NFC communication is started, the NFC driving circuit drives the NFC coil to send and receive high-frequency magnetic field signals, that is, the NFC coil completes the interaction of NFC signals.

[0037] In the process of implementing this application, the inventors found that there are at least the following problems in the prior art: the positions of different models vary greatly, and users are usually not clear about the location of the NFC antenna of the model they are using. Figure 1 As shown in the figure, in different scenarios, the card reader carrier has different shapes and the card reader position is not conspicuous, making it difficult for users to accurately find the card swiping position and align it with the NFC coil of the NFC device. At the same time, as a near-field communication technology, the transmission power and characteristics will also weaken as the distance between the two communicating NFC devices increases or they are misaligned. Alignment is required for successful card swiping. If the user does not align the position, near-field communication will fail, resulting in a low card swiping success rate.

[0038] In order to solve the above problems, the present disclosure provides a near-field communication method, a near-field communication circuit and an electronic device. By adjusting the number and phase of the near-field communication coils, the offset of the coil can be reduced so that the radiation direction of the coil of the electronic device matches the signal of the near-field communication transmitter, and the coupling energy of the coil can be enhanced, thereby improving the success rate of card swiping.

[0039] The near field communication method provided in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0040] In this embodiment, the near field communication method can be applied to the near field communication system 100, such as Figure 2 As shown, the near field communication system 100 includes an electronic device 101 and a near field communication transmitter 102. The near field communication circuit 103 provided in the present disclosure can be applied to the electronic device 101 so that the electronic device 101 has an NFC card swiping function. The electronic device 101 is used to perform near field communication with the near field communication transmitter 102.

[0041] The electronic device 101 may include a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing device connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., a mobile phone), a mobile station (MS) and other devices.

[0042] Specifically, the electronic device 101 can exchange information with the near field communication transmitter 102 through the near field communication circuit 103 to complete the corresponding NFC card swiping function service. The NFC card swiping function service may include NFC payment chip functions, such as card swiping mode functions, peer-to-peer mode functions, etc., as well as protocol stacks, security chips (SE) and other functions, which are not specifically introduced one by one.

[0043] For example, in different application scenarios, the electronic device 101 can perform different NFC card swiping functions through the near field communication circuit 103. For example, the card swiping mode function can be performed to replace bus card, shopping mall card swiping, access control and other functions, and the near field communication transmitter 102 can be a card swiping machine.

[0044] Specifically, when the near-field communication transmitter 102 is used as a card swiping machine, the near-field communication circuit 103 can transmit wireless signals and establish a connection with the card reader inside the card swiping machine through the antenna of the card swiping machine; when the electronic device 101 is close to the card swiping machine, the card swiping machine receives the NFC signal, and after the card swiping machine recognizes the NFC signal, the card swiping function of the electronic device 101 is completed.

[0045] Figure 3 is a flowchart of a near field communication method provided by an embodiment of the present application, such as Figure 3 As shown, in this embodiment, the near field communication method can be applied to a near field communication circuit 103, and the near field communication circuit 103 control circuit includes a near field communication chip 1031 and a phased array coil 1032; the phased array coil 1032 includes multiple coils; the near field communication chip 1031 is connected to the multiple coils respectively through connecting wires.

[0046] The method may include the following steps.

[0047] In step S101 , the coil receives a near field communication signal sent by a near field communication transmitter, and detects induced magnetic flux and induced current when the near field communication signal is received.

[0048] In some embodiments, the coil may be used to receive a near field communication signal sent by the near field communication transmitter 102, and detect the induced magnetic flux and the induced current when the near field communication signal is received.

[0049] For example, when a user is ready to use the NFC function to perform a card swiping operation, he will first bring an electronic device 101 with NFC function, such as a mobile phone, close to the near-field communication transmitter 102. When the near-field communication transmitter 102 detects that the electronic device 101 is approaching, if a communication connection with the near-field communication transmitter 102 is not successfully established within a preset time period, the near-field communication signal sent by the near-field communication transmitter 102 can be received through the coil, and when the near-field communication signal is received, the induced magnetic flux and induced current can be detected.

[0050] Specifically, when the near field communication transmitter 102 detects that the electronic device 101 is approaching, the near field communication transmitter 102 will send out a changing electromagnetic field, wherein the electromagnetic field can interact with other NFC devices within a preset distance range; when the coil of the near field communication circuit 103 is in the electromagnetic field, if the magnetic field of the near field communication transmitter 102 changes, the magnetic flux passing through the coil will also change, thereby generating an induced current in the coil, and the detected induced current and magnetic flux are sent to the near field communication chip 1031, wherein the magnitude of the induced current is proportional to the rate of change of the magnetic flux.

[0051] In step S102, the near field communication chip determines the signal strength of the near field communication signal according to the induced current induced by the coil, and determines the target coil from the multiple coils according to the signal strength and / or the magnetic flux induced by the coil.

[0052] In some embodiments, the near-field communication chip 1031 is used to determine the signal strength of the near-field communication signal based on the induced current induced by the coil when it is determined that the communication recognition between the near-field communication transmitter 102 and the electronic device 101 is unsuccessful, and to determine the target coil from the multiple coils based on one or more of the signal strength of the near-field communication signal and the magnetic flux induced by the coil.

[0053] The near field communication chip 1031 is a component dedicated to near field communication.

[0054] Then, the coupling circuit connected to the near field communication chip 1031 can measure the magnitude of the induced current, thereby indirectly determining the signal strength of the near field communication signal. In NFC communication, the signal strength is usually proportional to the magnetic field strength, so the signal strength of the near field communication signal can be determined by measuring the magnitude of the induced current.

[0055] In step S103, data communication is performed with the near field communication transmitter via the target coil.

[0056] In some embodiments, the target coil is controlled to be in a conducting state so that the target coil performs data communication with the near field communication transmitter 102 .

[0057] Then, when the near-field communication chip 1031 obtains the signal strength and the magnetic flux, it can determine the target coil from the multiple coils according to the signal strength and one or more of the magnetic flux sensed by the coil, and control the target coil to be in a conductive state so that the target coil can communicate data with the near-field communication transmitter 102.

[0058] By adopting the above technical solution, when it is determined that the communication and recognition between the near-field communication transmitter 102 and the electronic device 101 is unsuccessful, the offset of the coil can be reduced by adjusting the number and phase of the near-field communication coils, so that the coil radiation direction of the electronic device 101 matches the signal of the near-field communication transmitter 102, and the coupling energy of the coil can be enhanced, thereby improving the success rate of card swiping.

[0059] Considering that if the communication and recognition between the near-field communication transmitter 102 and the electronic device 101 is unsuccessful each time, near-field communication is performed by adjusting the number and phase of the coils, such processing steps are relatively cumbersome. Therefore, in some embodiments, the target coil can be determined by pre-setting a preset corresponding relationship to perform near-field communication.

[0060] In some embodiments, the current relative position information of the electronic device and the near-field communication transmitter can be obtained first, and then the first coil parameters corresponding to the relative position information can be determined based on the relative position information and a preset correspondence, and data communication can be performed with the near-field communication transmitter through the first coil to enable the near-field communication transmitter to identify the electronic device.

[0061] The preset corresponding relationship represents the corresponding relationship between the relative position information and the coil parameters; the coil parameters include one or more of the number of coils and the coil phase, and the first coil is a coil including the first coil parameters.

[0062] In one possible implementation, each time near-field communication is successful in the history, the relative position information of the electronic device 101 and the near-field communication transmitter 102 when the communication is successful can be obtained, and when the communication is successful, the number of coils turned on in the phased array coil 1032 can be obtained, and a preset correspondence can be established based on the relative position information and the corresponding number of coils; in another possible implementation, the phase of the coil turned on in the phased array coil 1032 can be obtained when the communication is successful, and a preset correspondence can be established based on the relative position information and the corresponding coil phase; similarly, in a third possible implementation, the number of coils turned on in the phased array coil 1032 can be obtained when the communication is successful, and the phase of the coil turned on in the phased array coil 1032 can be obtained, and a preset correspondence can be established based on the relative position information, the number of coils, and the phase of the coil turned on.

[0063] Optionally, the near-field communication chip 1031 is also used to obtain the current relative position information of the electronic device 101 and the near-field communication transmitter 102, determine the first coil parameters corresponding to the relative position information according to the relative position information and a preset correspondence, and control the first coil having the first coil parameters to be in a conducting state so that the first coil can communicate data with the near-field communication transmitter 102, and obtain the communication identification result between the near-field communication transmitter 102 and the electronic device 101.

[0064] The coil parameters include one or more of the number of coils and the phase of the coils, and the preset corresponding relationship represents the corresponding relationship between the relative position information and the coil parameters.

[0065] In this step, when the user is ready to use the NFC function to perform a card swiping operation, he will first bring an electronic device 101 with NFC function such as a mobile phone close to the near field communication transmitter 102. When the near field communication transmitter 102 detects that the electronic device 101 is approaching, if a communication connection is not successfully established with the near field communication transmitter 102 within a preset time period, the relative position information with the near field communication transmitter 102 can be estimated by measuring the received signal strength.

[0066] Among them, the relationship between signal strength and distance can be determined by the principle of electromagnetic induction.

[0067] When the near field communication transmitter 102 generates a changing electromagnetic field, the coil of the electronic device 101 will induce an induced current. The signal strength can be determined by measuring the magnitude of the induced current to further determine the relative position information. Specifically, the relationship model between signal strength and distance in the relevant technology can be used to determine the relative position information, and the specific content will not be repeated here.

[0068] Then, when the relative position information is obtained, the first coil corresponding to the relative position information can be determined from the multiple preset relative position information in the preset corresponding relationship, and the first coil can be controlled to be in a conductive state from the phased array coil 1032 so that the first coil can communicate data with the near field communication transmitter 102.

[0069] For example, in a case where the preset corresponding relationship includes a corresponding relationship between relative position information and the number of coils, the current relative position information between the electronic device 101 and the near-field communication transmitter 102 can be first acquired through the near-field communication chip 1031, and the number of coils corresponding to the relative position information can be determined from multiple preset relative position information in the preset corresponding relationship, and then the first coil in the phased array coil 1032 can be controlled to be in a conducting state so that the first coil can communicate data with the near-field communication transmitter 102.

[0070] In the case where the preset corresponding relationship includes the corresponding relationship between the relative position information and the coil phase, the current relative position information of the electronic device 101 and the near field communication transmitter 102 can be first obtained through the near field communication chip 1031, and the coil phase corresponding to the relative position information can be determined from multiple preset relative position information in the preset corresponding relationship. Then, the coil phase in the phased array coil 1032 can be adjusted to the coil phase corresponding to the relative position information, and the coil after the phase adjustment is used as the first coil, and the first coil is controlled to be in a conductive state, so that the first coil can communicate data with the near field communication transmitter 102.

[0071] In the case where the preset corresponding relationship includes relative position information, the number of coils, and the coil phase, the current relative position information between the electronic device 101 and the near field communication transmitter 102 can be first obtained through the near field communication chip 1031, and the number of coils corresponding to the relative position information can be determined from multiple preset relative position information in the preset corresponding relationship. Then, the phase of the coils of the corresponding number of coils in the phased array coil 1032 can be adjusted to the coil phase corresponding to the relative position information, and then the adjusted coil is used as the first coil, and the first coil is controlled to be in a conducting state, so that the first coil and the near field communication transmitter 102 can communicate data.

[0072] By adopting the above technical solution, the coil in the current phased array coil 1032 can be adjusted according to the coil parameters of the successful communication in the historical data, which can improve the adjustment efficiency of the coil and further improve the success rate of card swiping.

[0073] Since the adjustment is only made according to historical data, near field communication may still fail in the presence of data errors. Therefore, in some embodiments, if the target coil determined by the pre-correspondence relationship still cannot achieve successful near field communication, a new target coil can be further determined through the coil quantity adjustment operation so that the target coil can communicate data with the near field communication transmitter 102.

[0074] In some embodiments, when it is determined that the NFC transmitter fails to identify the electronic device, the steps of receiving the NFC signal sent by the NFC transmitter and communicating data with the NFC transmitter through the target coil may be continued.

[0075] Optionally, the identification response time of the data communication may be obtained; and when the identification response time is greater than or equal to a preset time threshold, it may be determined that the near field communication transmitter has failed to identify the electronic device.

[0076] Optionally, the near-field communication chip 1031 can be used to perform a coil quantity adjustment operation according to the signal strength of the near-field communication signal when communication and identification between the near-field communication transmitter 102 and the electronic device 101 is unsuccessful, determine the target coil from the multiple coils, and control the target coil to be in a conductive state so that the target coil communicates data with the near-field communication transmitter 102 until the near-field communication transmitter 102 successfully identifies the electronic device 101.

[0077] The coil quantity adjustment operation includes adding a first preset number of coils in this round, and using the target coils obtained in the previous round and the added first preset number of coils as the target coils in this round.

[0078] In some embodiments, when communication and identification between the near field communication transmitter and the electronic device are unsuccessful, a coil quantity adjustment operation may be performed according to the signal strength of the near field communication signal to determine a target coil from the multiple coils.

[0079] The coil quantity adjustment operation includes adding a first preset number of coils in this round, and using the target coils obtained in the previous round and the added first preset number of coils as the target coils in this round.

[0080] Optionally, after performing the coil quantity adjustment operation, if it is determined that the communication and recognition between the near-field communication transmitter and the electronic device are successful, the current relative position information of the electronic device and the near-field communication transmitter and the corresponding relationship between the number of currently turned-on coils are sent to the near-field communication chip, so that the near-field communication chip stores the corresponding relationship.

[0081] For example, the current relative position information between the electronic device and the near field communication transmitter and the corresponding relationship between the number of current conductive coils can be sent to the near field communication chip through a coupling feedback path, so that the near field communication chip stores the corresponding relationship.

[0082] And when the communication and identification between the near-field communication transmitter and the electronic device is unsuccessful, an adjustment instruction can be sent to the near-field communication chip, and the adjustment instruction is used to instruct the near-field communication chip to determine the target coil from the multiple coils according to the signal strength of the near-field communication signal, and control the target coil to be in a conductive state.

[0083] For example, the adjustment instruction may be sent to the near field communication chip via a coupled feedback path.

[0084] Specifically, Figure 4 As shown, the near field communication circuit 103 further includes a coupling feedback path, and the coupling feedback path includes a first feedback path 1033 and a second feedback path 1034 .

[0085] Among them, one end of the second feedback path 1034 is connected to the phased array coil 1032 through the connecting line, and the other end of the second feedback path 1034 is connected to the near-field communication chip 1031. One end of the first feedback path 1033 is connected to the phased array coil 1032 through the connecting line; the other end of the first feedback path 1033 is connected to the near-field communication chip 1031.

[0086] For example, the first feedback path 1033 can be used to send the corresponding relationship between the current relative position information of the electronic device 101 and the near-field communication transmitter 102 and the number of currently turned-on coils to the near-field communication chip 1031 if it is determined that the communication and recognition between the near-field communication transmitter 102 and the electronic device 101 is successful after performing the coil quantity adjustment operation, so that the near-field communication chip 1031 stores the corresponding relationship; and the second feedback path 1034 can be used to send an adjustment instruction to the near-field communication chip 1031 when the communication and recognition between the near-field communication transmitter 102 and the electronic device 101 is unsuccessful, wherein the adjustment instruction can be used to instruct the near-field communication chip 1031 to determine the target coil from the multiple coils according to the signal strength of the near-field communication signal, and control the target coil to be in a turned-on state.

[0087] In this step, if the communication and identification between the near field communication transmitter 102 and the electronic device 101 is unsuccessful, Figure 5 As shown, the following steps may be used to perform data communication with the near field communication transmitter 102:

[0088] In step S201 , the signal strength of the near field communication signal is acquired through the near field communication chip 1031 .

[0089] If it is determined that the signal strength is less than or equal to the preset signal strength threshold, executing steps S202-S205;

[0090] If it is determined that the signal strength is greater than the preset signal strength threshold, executing steps S104 and S205;

[0091] In step S202, the near field communication chip 1031 determines to increase the first preset number of coils, and uses the target coil obtained in the previous round and the first preset number of coils as the target coils in this round.

[0092] In step S203 , the target coil is controlled to be in a conducting state by the near field communication chip 1031 , so that the target coil performs data communication with the near field communication transmitter 102 .

[0093] In step S204 , the communication identification result between the near field communication transmitter 102 and the electronic device 101 is obtained through the near field communication chip 1031 .

[0094] The communication identification result includes successful communication identification and unsuccessful communication identification.

[0095] If the communication identification result is that the communication identification is unsuccessful, executing steps S102-S104;

[0096] If the communication identification result is successful, execute step S105;

[0097] In step S205, the current relative position information between the electronic device 101 and the NFC transmitter 102 and the corresponding relationship between the number of current conductive coils are sent to the NFC chip 1031 through the first feedback path 1033, so that the NFC chip 1031 stores the corresponding relationship.

[0098] For example, the communication time taken for the successful communication may also be stored.

[0099] By adopting the above technical solution, the conduction number of the coil can be adjusted, so as to improve the adjustment efficiency of the coil and further improve the success rate of card swiping.

[0100] In other embodiments, when communication and identification between the near field communication transmitter and the electronic device are unsuccessful, a coil phase adjustment operation may be performed based on the magnetic flux induced by the coil to determine a target coil from the multiple coils.

[0101] The coil phase adjustment operation includes taking the coil with the largest magnetic flux among the multiple unadjusted coils as a candidate target coil, increasing the phase of the candidate target coil by a first preset phase, and taking the adjusted phased array coil as the target coil of this round.

[0102] By way of example, the near-field communication chip 1031 can be used to, when communication and identification between the near-field communication transmitter 102 and the electronic device 101 is unsuccessful, perform a coil phase adjustment operation according to the magnetic flux sensed by the coil, determine the target coil from the multiple coils, and control the target coil to be in a conductive state, so that the target coil communicates data with the near-field communication transmitter 102 until the near-field communication transmitter 102 successfully identifies the electronic device 101.

[0103] The coil phase adjustment operation includes taking the coil with the largest magnetic flux among the multiple unadjusted coils as a candidate target coil, increasing the phase of the candidate target coil by a first preset phase, and taking the adjusted phased array coil 1032 as the target coil of this round.

[0104] Optionally, after performing the coil phase adjustment operation, if it is determined that the communication and recognition between the near-field communication transmitter and the electronic device are successful, the current relative position information of the electronic device and the near-field communication transmitter and the corresponding relationship between the phase of the current conductive coil are sent to the near-field communication chip so that the near-field communication chip stores the corresponding relationship.

[0105] And when the communication and identification between the near-field communication transmitter and the electronic device is unsuccessful, an adjustment instruction can be sent to the near-field communication chip, and the adjustment instruction is used to instruct the near-field communication chip to determine the target coil from the multiple coils according to the magnetic flux induced by the coil, and control the target coil to be in a conductive state.

[0106] For example, the near field communication circuit 103 may further include a coupling feedback path, where the coupling feedback path includes a first feedback path 1033 and a second feedback path 1034 .

[0107] For example, the first feedback path 1033 can be used to send the corresponding relationship between the current relative position information of the electronic device 101 and the near-field communication transmitter 102 and the phase of the current conductive coil to the near-field communication chip 1031 if it is determined that the communication and recognition between the near-field communication transmitter 102 and the electronic device 101 is successful after performing the coil phase adjustment operation, so that the near-field communication chip 1031 stores the corresponding relationship; the second feedback path 1034 can be used to send an adjustment instruction to the near-field communication chip 1031 when the communication and recognition between the near-field communication transmitter 102 and the electronic device 101 is unsuccessful, and the adjustment instruction is used to instruct the near-field communication chip 1031 to determine the target coil from the multiple coils according to the magnetic flux induced by the coil, and control the target coil to be in a conductive state.

[0108] In this step, if the communication and identification between the near field communication transmitter 102 and the electronic device 101 is unsuccessful, Figure 6 As shown, the following steps may be used to perform data communication with the near field communication transmitter 102:

[0109] In step S301 , the phase of each coil in the phased array coil 1032 is initialized by controlling the near field communication chip 1031 .

[0110] In this way, the phase of each coil can be in a vertical direction with the phase of the coil of the near field communication transmitter 102 , so that the electronic device 101 can be placed right opposite to the near field communication transmitter 102 .

[0111] In step S302 , the total magnetic flux induced in the phased array coil 1032 is acquired through the near field communication chip 1031 .

[0112] The total magnetic flux is the sum of the magnetic fluxes induced in each coil.

[0113] When the total magnetic flux is less than or equal to the preset magnetic flux threshold, steps S205 and S206 may be performed;

[0114] When the total magnetic flux is greater than the preset magnetic flux threshold, steps S203-S206 may be executed;

[0115] In step S303, the coil with the largest magnetic flux among the multiple unadjusted coils is used as a candidate target coil, and the phase of the candidate target coil is increased by a first preset phase, and the adjusted phased array coil 1032 is used as the target coil.

[0116] In step S304 , the target coil is controlled to be in a conducting state by the near field communication chip 1031 , so that the target coil performs data communication with the near field communication transmitter 102 .

[0117] In step S305 , the communication identification result between the near field communication transmitter 102 and the electronic device 101 is obtained through the near field communication chip 1031 .

[0118] The communication identification result includes successful communication identification and unsuccessful communication identification.

[0119] If the communication identification result is that the communication identification is unsuccessful, executing steps S303-S305;

[0120] If the communication identification result is successful, execute step S306;

[0121] In step S306, the current relative position information between the electronic device 101 and the NFC transmitter 102 and the corresponding relationship between the phase of the current conducting coil are sent to the NFC chip 1031 through the first feedback path 1033, so that the NFC chip 1031 stores the corresponding relationship.

[0122] For example, the communication time taken for the successful communication may also be stored.

[0123] By adopting the above technical solution, the conduction phase of the coil can be adjusted to align the coil of the electronic device 101 with the coil of the near field communication transmitter 102, thereby reducing the offset of the coil and enhancing the coupling energy of the coil, thereby improving the success rate of card swiping.

[0124] In other embodiments, when communication and identification between the near-field communication transmitter and the electronic device are unsuccessful, a coil adjustment operation may be performed based on the signal strength of the near-field communication signal and the magnetic flux induced by the coil to determine the target coil from the multiple coils.

[0125] Among them, the coil adjustment operation includes adding a second preset number of coils in this round, and using the target coil obtained in the previous round and the added second preset number of coils as candidate coils for this round, and adding a second preset phase based on the phase of the candidate coil, and using the candidate coil after the added phase as the target coil for this round.

[0126] Optionally, the near-field communication chip 1031 can be used to perform a coil adjustment operation according to the signal strength of the near-field communication signal and the magnetic flux induced by the coil when the communication and identification between the near-field communication transmitter 102 and the electronic device 101 is unsuccessful, determine the target coil from the multiple coils, and control the target coil to be in a conductive state, so that the target coil communicates data with the near-field communication transmitter 102 until the near-field communication transmitter 102 successfully identifies the electronic device 101.

[0127] Among them, the coil adjustment operation includes adding a second preset number of coils in this round, and using the target coil obtained in the previous round and the added second preset number of coils as candidate coils for this round, and adding a second preset phase based on the phase of the candidate coil, and using the candidate coil after the added phase as the target coil for this round.

[0128] Optionally, after performing the coil adjustment operation, if it is determined that the communication and recognition between the near-field communication transmitter and the electronic device is successful, the correspondence between the current relative position information of the electronic device and the near-field communication transmitter, the number of currently turned-on coils, and the phase of the currently turned-on coils is sent to the near-field communication chip, so that the near-field communication chip stores the correspondence.

[0129] And when the communication and identification between the near-field communication transmitter and the electronic device is unsuccessful, an adjustment instruction is sent to the near-field communication chip, and the adjustment instruction is used to instruct the near-field communication chip to determine the target coil from the multiple coils according to the signal strength of the near-field communication signal and the magnetic flux induced by the coil, and control the target coil to be in a conductive state.

[0130] For example, the near field communication circuit 103 may further include a coupling feedback path, where the coupling feedback path includes a first feedback path 1033 and a second feedback path 1034 .

[0131] Specifically, the first feedback path 1033 can be used to send the corresponding relationship between the current relative position information of the electronic device 101 and the near-field communication transmitter 102, the number of currently turned-on coils, and the phase of the currently turned-on coils to the near-field communication chip 1031 after performing the coil adjustment operation, if it is determined that the communication and recognition between the near-field communication transmitter 102 and the electronic device 101 are successful, so that the near-field communication chip 1031 stores the corresponding relationship; and the second feedback path 1034 can be used to send an adjustment instruction to the near-field communication chip 1031 when the communication and recognition between the near-field communication transmitter 102 and the electronic device 101 are unsuccessful, and the adjustment instruction is used to instruct the near-field communication chip 1031 to determine the target coil from the multiple coils according to the signal strength of the near-field communication signal and the magnetic flux induced by the coil, and control the target coil to be in a conductive state.

[0132] By adopting the above technical solution, the conduction phase and the conduction number of the coil can be adjusted, so that the coil of the electronic device 101 can be aligned with the coil of the near-field communication transmitter 102, the offset of the coil can be reduced, and the coupling energy of the coil can be enhanced, thereby improving the success rate of card swiping.

[0133] Figure 7 1 is a flow chart of a method for performing near field communication using a near field communication circuit 103 provided in an embodiment of the present application. Figure 7 As shown, the method comprises the following steps:

[0134] In step S401 , the current relative position information between the electronic device 101 and the near field communication transmitter 102 is acquired through the near field communication chip 1031 .

[0135] In step S402, coil parameters corresponding to the relative position information are determined according to the relative position information and a preset corresponding relationship.

[0136] For example, in the case where the preset corresponding relationship includes a corresponding relationship between relative position information and the number of coils, the near-field communication chip 1031 can firstly acquire the current relative position information of the electronic device 101 and the near-field communication transmitter 102, and determine the number of coils corresponding to the relative position information from a plurality of preset relative position information in the preset corresponding relationship, and then the corresponding number of coils in the phased array coil 1032 can be used as target coils and the target coils can be controlled to be in a conducting state, so that the target coils can communicate data with the near-field communication transmitter 102.

[0137] In the case where the preset corresponding relationship includes the corresponding relationship between the relative position information and the coil phase, the current relative position information of the electronic device 101 and the near field communication transmitter 102 can be first obtained through the near field communication chip 1031, and the coil phase corresponding to the relative position information can be determined from multiple preset relative position information in the preset corresponding relationship. Then, the coil phase in the phased array coil 1032 can be adjusted to the coil phase corresponding to the relative position information, and the coil after the phase adjustment is used as the target coil, and the target coil is controlled to be in a conductive state, so that the target coil can communicate data with the near field communication transmitter 102.

[0138] In the case where the preset corresponding relationship includes relative position information, the number of coils, and the phase of the conductive coil, the current relative position information of the electronic device 101 and the near field communication transmitter 102 can be first obtained through the near field communication chip 1031, and the number of coils corresponding to the relative position information can be determined from multiple preset relative position information in the preset corresponding relationship. Then, the phase of the corresponding number of coils in the phased array coil 1032 can be adjusted to the coil with the coil phase corresponding to the relative position information as the target coil, and the target coil is controlled to be in a conductive state, so that the target coil can communicate data with the near field communication transmitter 102.

[0139] In step S403, the coil having the first coil parameter in the phased array coil 1032 is used as a target coil.

[0140] In step S404, according to the preset corresponding relationship, the historical communication duration corresponding to the target coil in the historical data is determined.

[0141] The preset corresponding relationship also includes the communication duration corresponding to the coil parameter.

[0142] If the historical communication duration is greater than or equal to the preset duration threshold, execute steps S405-S410;

[0143] If the historical communication duration is less than the preset duration threshold, executing steps S409 and S410;

[0144] In step S405, a near field communication signal sent by the near field communication transmitter 102 is received through the coil, and when the near field communication signal is received, the induced magnetic flux and the induced current are detected.

[0145] In step S406 , the signal strength of the near field communication signal is determined by the near field communication chip 1031 according to the induced current sensed by the coil.

[0146] In step S407, a target coil is determined from the plurality of coils according to one or more of the signal strength and the magnetic flux induced by the coil.

[0147] In step S408 , the target coil is controlled to be in a conducting state, so that the target coil performs data communication with the near field communication transmitter 102 .

[0148] In step S409 , the communication identification result between the near field communication transmitter 102 and the electronic device 101 is obtained through the near field communication chip 1031 .

[0149] The communication identification result includes successful communication identification and unsuccessful communication identification.

[0150] If the communication identification result is that the communication identification is unsuccessful, executing steps S405-S409;

[0151] If the communication identification result is successful, execute step S410;

[0152] In step S410, the current relative position information between the electronic device 101 and the NFC transmitter 102 and the corresponding relationship between the number of current conductive coils are sent to the NFC chip 1031 through the first feedback path 1033, so that the NFC chip 1031 stores the corresponding relationship.

[0153] For example, the communication duration used for successful communication may also be stored.

[0154] By adopting the above technical solution, the coil in the current phased array coil 1032 can be adjusted based on the coil parameters of the successful communication in the historical data, and the number and phase of the near-field communication coils can be further adjusted to reduce the offset of the coil, so that the coil radiation direction of the electronic device 101 matches the signal of the near-field communication transmitter 102, which can enhance the coupling energy of the coil and thus improve the success rate of card swiping.

[0155] Figure 8 is a structural diagram of a near field communication circuit provided in an embodiment of the present application, such as Figure 8 As shown, the near field communication circuit 103 is applied to an electronic device, and the near field communication circuit 103 control circuit includes a near field communication chip 1031 and a phased array coil 1032; the phased array coil 1032 includes a plurality of coils; the near field communication chip 1031 is connected to the plurality of coils respectively through connecting wires.

[0156] The coil 1032 is used to receive the near field communication signal sent by the near field communication transmitter 102, and detect the induced magnetic flux and the induced current when the near field communication signal is received.

[0157] The near field communication chip 1031 is used to determine the signal strength of the near field communication signal according to the induced current induced by the coil 1032 , and to determine the target coil from the multiple coils 1032 according to the signal strength and / or the magnetic flux induced by the coil 1032 .

[0158] The near field communication circuit 103 is used to perform data communication with the near field communication transmitter 102 through the target coil.

[0159] By adopting the above technical solution, when it is determined that the communication and recognition between the near-field communication transmitter and the electronic device is unsuccessful, the offset of the coil can be reduced by adjusting the number and phase of the near-field communication coils, so that the radiation direction of the coil of the electronic device matches the signal of the near-field communication transmitter, and the coupling energy of the coil can be enhanced, thereby improving the success rate of card swiping.

[0160] Other structures and operations according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0161] Fig. 9 is a block diagram of a near field communication device provided in an embodiment of the present application, such as Fig. 9 As shown, the near field communication device 600 includes the near field communication circuit 103 of any one of the present disclosures.

[0162] Fig.10 is a block diagram of an electronic device provided in an embodiment of the present application, such as Fig.10 As shown, the electronic device 700 includes the present disclosure Fig. 9 The near field communication device 600 is provided.

[0163] The near field communication device in the embodiment of the present application can be an electronic device, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or other devices other than a terminal. Exemplarily, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) device, a robot, a wearable device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), etc., and can also be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0164] The near field communication device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0165] Alternatively, if Fig.11 As shown, an embodiment of the present application also provides an electronic device 800, including a processor 801 and a memory 802, wherein the memory 802 stores programs or instructions that can be executed on the processor 801, and when the program or instructions are executed by the processor 801, the various steps of the above-mentioned method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, they are not described here.

[0166] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices described above.

[0167] Fig.12 A schematic diagram of the hardware structure of another electronic device to implement an embodiment of the present application.

[0168] The electronic device 900 includes but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, and a processor 910 and other components.

[0169] Those skilled in the art will appreciate that the electronic device 900 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 910 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.12 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0170] Among them, the processor 910 is used to receive a near field communication signal sent by a near field communication transmitter, and detect the induced magnetic flux and the induced current when the near field communication signal is received; when it is determined that the communication and recognition between the near field communication transmitter and the electronic device is unsuccessful, determine the signal strength of the near field communication signal according to the induced current induced by the coil, and determine the target coil from multiple coils according to one or more of the signal strength and the magnetic flux induced by the coil; control the target coil to be in a conductive state so that the target coil communicates data with the near field communication transmitter.

[0171] In an embodiment of the present application, by receiving a near field communication signal sent by a near field communication transmitter, and detecting the induced magnetic flux and induced current when the near field communication signal is received; when it is determined that the communication identification between the near field communication transmitter and the electronic device is unsuccessful, the signal strength of the near field communication signal is determined according to the induced current induced by the coil, and the target coil is determined from multiple coils according to the signal strength and one or more of the magnetic flux induced by the coil; the target coil is controlled to be in a conducting state so that the target coil communicates data with the near field communication transmitter. In this way, when it is determined that the communication identification between the near field communication transmitter and the electronic device is unsuccessful, the offset of the coil can be reduced by adjusting the number and phase of the near field communication coils, so that the radiation direction of the coil of the electronic device matches the signal of the near field communication transmitter, and the coupling energy of the coil can be enhanced, thereby improving the success rate of card swiping.

[0172] It should be understood that in the embodiment of the present application, the input unit 904 may include a graphics processor (Graphics Processing Unit, GPU) 9041 and a microphone 9042, and the graphics processor 9041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 907 includes a touch panel 9071 and at least one of other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0173] The memory 909 can be used to store software programs and various data. The memory 909 can mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area can store an operating system, an application program or instructions required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 909 can include a volatile memory or a non-volatile memory, or the memory 909 can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 909 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0174] The processor 910 may include one or more processing units; optionally, the processor 910 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 910.

[0175] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0176] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0177] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

[0178] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0179] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A near field communication method, characterized in that: The method is applied to a near field communication circuit, wherein the near field communication circuit comprises a near field communication chip and a phased array coil; The phased array coil includes a plurality of coils; the near field communication chip is connected to the plurality of coils respectively through connecting wires; and the method includes: The coil receives a near field communication signal sent by a near field communication transmitter, and detects an induced magnetic flux and an induced current when the near field communication signal is received; The near field communication chip determines the signal strength of the near field communication signal according to the induced current induced by the coil, and determines the target coil from the multiple coils according to the signal strength and / or the magnetic flux induced by the coil; Data communication is performed with the near field communication transmitter via the target coil.

2. The method according to claim 1, characterized in that The method further comprises: Acquiring current relative position information between the electronic device and the near field communication transmitter; Determine a first coil parameter corresponding to the relative position information according to the relative position information and a preset corresponding relationship; the preset corresponding relationship represents a corresponding relationship between the relative position information and the coil parameter; the coil parameter includes one or more of the number of coils and the coil phase; Performing data communication with the near field communication transmitter via a first coil, wherein the first coil is a coil including first coil parameters; When it is determined that the NFC transmitter fails to identify the electronic device, the steps of receiving the NFC signal sent by the NFC transmitter and communicating data with the NFC transmitter through the target coil are continued.

3. The method according to claim 2, characterized in that The determining that the near field communication transmitter fails to identify the electronic device comprises: Get the recognition response time of data communication; When the identification response time is greater than or equal to the preset time threshold, it is determined that the near field communication transmitter has failed to identify the electronic device.

4. The method according to claim 1, characterized in that: Determining a target coil from the plurality of coils according to the signal strength and / or the magnetic flux induced by the coil comprises: In the case that the communication identification between the near field communication transmitter and the electronic device is unsuccessful, performing a coil quantity adjustment operation according to the signal strength of the near field communication signal to determine a target coil from the plurality of coils; The coil quantity adjustment operation includes adding a first preset number of coils in this round, and using the target coils obtained in the previous round and the first preset number of coils added as the target coils in this round.

5. The method according to claim 4, characterized in that The method further comprises: After performing the coil quantity adjustment operation, if it is determined that the communication recognition between the near field communication transmitter and the electronic device is successful, the corresponding relationship between the current relative position information of the electronic device and the near field communication transmitter and the current number of the conductive coils is sent to the near field communication chip, so that the near field communication chip stores the corresponding relationship; When communication and identification between the near field communication transmitter and the electronic device are unsuccessful, an adjustment instruction is sent to the near field communication chip, and the adjustment instruction is used to instruct the near field communication chip to determine a target coil from the multiple coils according to the signal strength of the near field communication signal, and control the target coil to be in a conducting state.

6. The method according to claim 1, characterized in that Determining a target coil from the plurality of coils according to the signal strength and / or the magnetic flux induced by the coil comprises: In the case that the communication identification between the near field communication transmitter and the electronic device is unsuccessful, performing a coil phase adjustment operation according to the magnetic flux induced by the coil to determine a target coil from the plurality of coils; The coil phase adjustment operation includes taking the coil with the largest magnetic flux among the multiple unadjusted coils as a candidate target coil, increasing the phase of the candidate target coil by a first preset phase, and taking the adjusted phased array coil as the target coil of this round.

7. The method according to claim 6, characterized in that The method further comprises: After performing the coil phase adjustment operation, if it is determined that the communication recognition between the near field communication transmitter and the electronic device is successful, the corresponding relationship between the current relative position information of the electronic device and the near field communication transmitter and the phase of the current conducting coil is sent to the near field communication chip, so that the near field communication chip stores the corresponding relationship; When communication and identification between the near field communication transmitter and the electronic device are unsuccessful, an adjustment instruction is sent to the near field communication chip, wherein the adjustment instruction is used to instruct the near field communication chip to determine a target coil from the multiple coils according to the magnetic flux induced by the coil, and control the target coil to be in a conducting state.

8. The method according to claim 1, characterized in that: Determining a target coil from the plurality of coils according to the signal strength and / or the magnetic flux induced by the coil comprises: In the case that the communication identification between the near field communication transmitter and the electronic device is unsuccessful, performing a coil adjustment operation according to the signal strength of the near field communication signal and the magnetic flux induced by the coil to determine a target coil from the plurality of coils; Among them, the coil adjustment operation includes adding a second preset number of coils in this round, and using the target coil obtained in the previous round and the second preset number of coils added as candidate coils for this round, and adding a second preset phase based on the phase of the candidate coil, and using the candidate coil after the added phase as the target coil for this round.

9. The method according to claim 8, characterized in that The method further comprises: After performing the coil adjustment operation, if it is determined that the communication recognition between the near field communication transmitter and the electronic device is successful, the corresponding relationship between the current relative position information of the electronic device and the near field communication transmitter, the number of the current conductive coils, and the phase of the current conductive coils is sent to the near field communication chip, so that the near field communication chip stores the corresponding relationship; In the event that communication and identification between the near field communication transmitter and the electronic device is unsuccessful, an adjustment instruction is sent to the near field communication chip, wherein the adjustment instruction is used to instruct the near field communication chip to determine a target coil from the multiple coils based on the signal strength of the near field communication signal and the magnetic flux induced by the coil, and to control the target coil to be in a conducting state.

10. A near field communication circuit, the near field communication circuit being applied to an electronic device, characterized in that: The near field communication circuit includes a near field communication chip and a phased array coil; the phased array coil includes a plurality of coils; the near field communication chip is connected to the plurality of coils respectively through connecting wires; The coil is used to receive a near field communication signal sent by a near field communication transmitter, and to detect an induced magnetic flux and an induced current when the near field communication signal is received; The near field communication chip is used to determine the signal strength of the near field communication signal according to the induced current induced by the coil, and to determine the target coil from the multiple coils according to the signal strength and / or the magnetic flux induced by the coil; The near field communication circuit is used to perform data communication with the near field communication transmitter through the target coil.

11. An electronic device, characterized in that: The near field communication circuit according to claim 10 is included.

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