Near field communication transmitting equipment, communication method and computer readable storage medium

Abstract

The invention discloses near field communication transmitting equipment, a communication method and a computer readable storage medium, the near field communication transmitting equipment comprises a controller, an impedance matching module, a voltage dividing module, a coil antenna and N near field communication reader-writer chips, the controller is coupled with the N near field communication reader-writer chips, and the impedance matching module is coupled with the N near field communication reader-writer chips. The sending module is suitable for synchronously sending a target instruction by adopting M near field communication reader-writer chips; n and M are positive integers, and 1 < M < = N; the impedance matching module is coupled with the transmitting ports of the N near field communication reader-writer chips, and is coupled with the coil antenna; and the voltage dividing module is coupled with a receiving port of at least one near field communication reader-writer chip and is coupled with the coil antenna. According to the scheme, the transmitting power of near field communication can be improved, and then NFC wireless charging can be carried out on the intelligent equipment through the NFC communication module.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and in particular to a near-field communication transmitting device, a communication method, and a computer-readable storage medium. Background Technology

[0002] With the development of electronic technology, Near Field Communication (NFC) devices are widely used in everyday smart devices, such as smartphones, smartwatches, and smart bracelets. NFC applications are also becoming increasingly widespread, including contactless payments, wireless pairing, peer-to-peer transmission, and NFC smart locks.

[0003] The use of NFC communication modules for NFC wireless charging of smart devices has attracted widespread attention and research. However, existing NFC transmitters typically have low output power, which cannot meet charging requirements. Summary of the Invention

[0004] The purpose of this invention is at least to provide a near-field communication transmitting device that can improve the transmission power of near-field communication, thereby enabling NFC wireless charging of smart devices via an NFC communication module.

[0005] In a first aspect, the present invention provides a near-field communication transmitting device, comprising: a controller, an impedance matching module, a voltage divider module, a coil antenna, and N near-field communication reader chips, wherein: the controller is coupled to the N near-field communication reader chips and is adapted to synchronously transmit target commands using M near-field communication reader chips; N and M are both positive integers, and 1 < M ≤ N; the impedance matching module is coupled to the transmitting port of the N near-field communication reader chips and to the coil antenna; the voltage divider module is coupled to the receiving port of at least one near-field communication reader chip and to the coil antenna.

[0006] The near-field communication (NFC) transmitter includes N NFC reader chips. When the NFC transmitter sends a target command, it does so through M NFC reader chips, where M ≥ 2. Therefore, sending target commands through multiple NFC reader chips can effectively increase the transmitter's transmission power.

[0007] Optionally, the near-field communication transmitting device further includes: a clock module, coupled to the clock input terminals of the N near-field communication reader chips, adapted to output clock signals to the N near-field communication reader chips.

[0008] Different near-field communication reader chips use the same clock module, which can avoid the delay that may occur when using different clock modules.

[0009] Optionally, the near-field communication transmitting device further includes: a voltage adjustment module, coupled to the controller and the N near-field communication reader chips, adapted to receive the voltage adjustment signal output by the controller and adjust the input voltage of the M near-field communication reader chips.

[0010] The input voltage of the M near-field communication reader chips is adjusted via a voltage adjustment module. This allows the power of the transmitted signal to be adjusted according to actual application requirements.

[0011] Optionally, among the M near-field communication reader chips, the i-th near-field communication reader chip includes a first transmitting port and a second transmitting port; the M first transmitting ports are coupled to the first input terminal of the impedance matching module, and the M second transmitting ports are coupled to the second input terminal of the impedance matching module; i is a positive integer and 1≤i≤M.

[0012] Optionally, the signal input to the first input terminal of the impedance matching module is out of phase with the signal input to the second input terminal of the impedance matching module.

[0013] Optionally, the M near-field communication reader chips include a first part of near-field communication reader chips and a second part of near-field communication reader chips; wherein: the first part of the near-field communication reader chips has a first transmit port coupled to its second transmit port and coupled to the first input terminal of the impedance matching module; the second part of the near-field communication reader chips has a first transmit port coupled to its second transmit port and coupled to the second input terminal of the impedance matching module; the number of the first part of the near-field communication reader chips is equal to the number of the second part of the near-field communication reader chips; the signal input to the first input terminal of the impedance matching module is out of phase with the signal input to the second input terminal of the impedance matching module.

[0014] Optionally, the controller is coupled to the N near-field communication reader chips via the same data bus.

[0015] Secondly, the present invention provides a near-field communication method, applied in any of the near-field communication transmitting devices described above, comprising: acquiring the receiving power of a near-field communication receiving device; and adjusting the transmitting power of the near-field communication transmitting device based on the receiving power, comprising: using M near-field communication reader chips to send the target command.

[0016] Optionally, adjusting the transmission power of the near-field communication transmitting device based on the received power includes: adjusting the input voltage of the M near-field communication reader chips based on the received power.

[0017] Thirdly, the present invention also provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored, wherein the computer program is executed by a processor to perform the steps of any of the above-described near-field communication methods. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a near-field communication transmitting device according to an embodiment of the present invention;

[0019] Figures 2-5 These are schematic diagrams of the structures of several near-field communication transmitting devices in embodiments of the present invention;

[0020] Figure 6 This is a flowchart of a near-field communication method in an embodiment of the present invention. Detailed Implementation

[0021] In existing technologies, the output power of NFC transmitters is usually low, which cannot meet the needs of providing NFC charging for smart devices.

[0022] In this embodiment of the invention, the near-field communication (NFC) transmitting device includes N NFC reader / writer chips. When the NFC transmitting device sends a target command, the target command is sent through M NFC reader / writer chips, where M ≥ 2. Therefore, sending the target command through at least two NFC reader / writer chips can effectively improve the transmission power of the NFC transmitting device. Furthermore, it enables NFC wireless charging for smart devices.

[0023] To make the above-mentioned objectives, features and beneficial effects of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] This invention provides a near-field communication transmitting device, with reference to... Figure 1 .

[0025] In this embodiment of the invention, the near-field communication transmitting device may include: a controller 11, an impedance matching module 12, a voltage divider module 13, a coil antenna 14, and N NFC reader chips, wherein the N NFC reader chips are sequentially NFC reader chip 151, NFC reader chip 152, ..., NFC reader chip 15N.

[0026] In a specific implementation, the controller 11 is coupled to all N NFC reader chips and is suitable for selecting M NFC reader chips from the N NFC reader chips; the controller 11 can control the selected M NFC reader chips to send target instructions synchronously; N and M are both positive integers, and 2≤M≤N.

[0027] Impedance matching module 12 is coupled to the transmit ports of N NFC reader chips and to coil antenna 14.

[0028] The voltage divider module 13 is coupled to the receiving port of at least one of the M NFC reader chips and to the coil antenna 14.

[0029] In a specific implementation, the NFC transmitting device may also include a clock module 16, which is coupled to the clock input terminals of N NFC reader chips and is suitable for outputting clock signals to the N NFC reader chips.

[0030] In a specific implementation, the NFC transmitting device may also include a voltage adjustment module 17, which can be coupled to the controller 11 and N NFC reader chips. When the voltage adjustment module 17 receives the voltage adjustment signal output by the controller 11, it can adjust the input voltage of the N NFC reader chips.

[0031] The controller can select M NFC reader chips from N NFC reader chips. Therefore, when the output voltage of the voltage adjustment module changes, the input voltage of the M NFC reader chips changes accordingly, thereby adjusting the output power of the M NFC reader chips.

[0032] In some embodiments, the voltage adjustment module 17 can be a DC-DC voltage regulator module. The DC-DC voltage regulator module can adjust the output voltage based on the voltage adjustment signal output by the controller 11.

[0033] The NFC transmitting device described above will be explained in detail below.

[0034] In specific implementation, the aforementioned coil antenna 14 can be used to generate a radio frequency magnetic field to realize NFC communication and the transmission of radio frequency signal energy.

[0035] Impedance matching module 12 may include a capacitor. Impedance matching module 12 and coil antenna 14 form a resonant circuit. The resonant circuit is used to tune coil antenna 14 to tune the transmission frequency of coil antenna 14 to around 13.56MHz, thereby optimizing the transmission performance of the NFC transmitting device.

[0036] N NFC reader / writer chips, operating at around 13.56MHz, are capable of NFC communication.

[0037] The clock module 16 can provide clock signals of the same source and phase to N NFC reader / writer chips.

[0038] The voltage divider module 13 can be composed of capacitors and resistors. Its function is to adjust the resonant radio frequency voltage of the coil antenna 14 to within the receiving voltage range of the NFC reader chip. The resonant radio frequency voltage of the coil antenna 14 is usually higher than the receiving voltage of the NFC reader chip. Therefore, the voltage divider module 13 is needed to step down the resonant radio frequency voltage of the coil antenna 14.

[0039] In practical implementation, for the M NFC reader / writer chips used to transmit target commands, each NFC reader / writer chip can be connected to a voltage divider module; alternatively, only some of the M NFC reader / writer chips can be connected to a voltage divider module. If the receiving port of an NFC reader / writer chip is connected to a voltage divider module, then that NFC reader / writer chip can be used to receive response information sent by the NFC receiving device. If the receiving port of an NFC reader / writer chip is not connected to a voltage divider module, then that NFC reader / writer chip can only be used to send target commands and not to receive response information sent by the NFC receiving device.

[0040] The aforementioned NFC receiving device can refer to a device corresponding to an NFC transmitting device. The NFC transmitting device can be a reader / writer, a subway turnstile, or other device with NFC read / write functionality. The NFC receiving device can be a smartphone, a wearable smart device, or other device with NFC functionality.

[0041] For example, refer to Figure 2 The present invention provides a schematic diagram of the structure of another NFC transmitting device in an embodiment of the present invention. Figure 2 In this NFC transmitting device, there are two NFC reader / writer chips, namely a first NFC reader / writer chip 151 and a second NFC reader / writer chip 152. The second NFC reader / writer chip 152 is connected to a voltage divider module 131.

[0042] like Figure 2 In the NFC transmitting device shown, both the first NFC reader chip 151 and the second NFC reader chip 152 transmit the target command when transmitting the target command. When receiving response information sent by the NFC receiving device, only the second NFC reader chip 152 receives the response information; the first NFC reader chip 151 may not participate in receiving the response information.

[0043] For example, refer to Figure 3 The present invention provides a structural schematic diagram of another NFC transmitting device according to an embodiment of the present invention. Figure 3 In this NFC transmitting device, there are two NFC reader / writer chips, namely a first NFC reader / writer chip 151 and a second NFC reader / writer chip 152. The first NFC reader / writer chip is connected to a voltage divider module 132, and the second NFC reader / writer chip is connected to a voltage divider module 131.

[0044] like Figure 3 In the NFC transmitting device shown, when transmitting a target command, both the first NFC reader / writer chip 151 and the second NFC reader / writer chip 152 transmit the target command. Furthermore, both the first NFC reader / writer chip 151 and the second NFC reader / writer chip 152 receive response information sent by the NFC receiving device.

[0045] In specific implementation, for each of the M NFC reader / writer chips, there is a first transmitting port and a second transmitting port. The first transmitting port of the i-th NFC reader / writer chip is coupled to the first input terminal of the impedance matching module, and the second transmitting port of the i-th NFC reader / writer chip is coupled to the second input terminal of the impedance matching module. i is a positive integer and i ≤ M. In this scenario, the signal input to the first input terminal of the impedance matching module (hereinafter referred to as the first input signal) is out of phase with the signal input to the second input terminal of the impedance matching module (hereinafter referred to as the second input signal).

[0046] The inversion of the first input signal and the second input signal can mean that when the first input signal is high, the second input signal is low; conversely, when the first input signal is low, the second input signal is high.

[0047] Reference Figure 4 Another NFC transmitting device is provided in the embodiments of the present invention.

[0048] Figure 4 In the first NFC reader chip 151, the first transmitting port is coupled to the first transmitting port of the second NFC reader chip 152, and both are connected to the first input terminal of the impedance matching module 12; the second transmitting port of the first NFC reader chip 151 is coupled to the second transmitting port of the second NFC reader chip 152, and both are connected to the second input terminal of the impedance matching module 12.

[0049] In practice, there may be other connections between the transmitter port of different NFC reader chips and the input port of the impedance matching module.

[0050] In a specific implementation, the M NFC reader chips can be divided into two parts: a first part of NFC reader chips and a second part of NFC reader chips. The first transmission port of the first part of NFC reader chips is coupled to the second transmission port of the first part of NFC reader chips and is also coupled to the first input terminal of the impedance matching module 12. The first transmission port of the second part of NFC reader chips is coupled to the second transmission port of the second part of NFC reader chips and is also coupled to the second input terminal of the impedance matching module 12. The number of the first part of NFC reader chips and the number of the second part of NFC reader chips are equal.

[0051] For example, if M = 4, then the number of NFC reader / writer chips in the first part is 2, and the number of NFC reader / writer chips in the second part is 2. Alternatively, if M = 2, then the number of NFC reader / writer chips in the first part is 1, and the number of NFC reader / writer chips in the second part is 1.

[0052] Reference Figure 5 The present invention provides a schematic diagram of the structure of another NFC transmitting device in an embodiment of the present invention.

[0053] Figure 5 In the above, when M is 2, the two NFC reader chips include a first NFC reader chip 151 and a second NFC reader chip 152, wherein:

[0054] The first transmitting port of the first NFC reader chip 151 is coupled to the second transmitting port of the first NFC reader chip 151, and is also coupled to the first input terminal of the impedance matching module 12.

[0055] The first transmit port of the second NFC reader chip 151 is coupled to the second transmit port of the second NFC reader chip 152, and is also coupled to the second input terminal of the impedance matching module 12.

[0056] The signal input to the first input terminal of the impedance matching module 12 is out of phase with the signal input to the second input terminal.

[0057] In practical implementation, the controller can be coupled to N NFC reader chips through the same data bus to communicate with the N NFC reader chips.

[0058] In other words, N NFC reader chips connected in parallel via a data bus can simultaneously receive target commands from the controller and simultaneously output NFC radio frequency signals. There is virtually no time delay between the N NFC reader chips.

[0059] In specific implementations, the impedance matching module 12, voltage divider module 13, coil antenna 14, and clock module 16 mentioned above can be related modules in existing NFC transmitting devices. Their working principles and processes will not be elaborated in the embodiments of this invention.

[0060] The working process of the NFC device provided in the above embodiments of the present invention will be described below.

[0061] Reference Figure 6 This invention provides an NFC communication method according to an embodiment of the invention. This communication method can be executed by a controller in the NFC transmitting device provided in any of the above embodiments.

[0062] The following will take M=2 as an example and explain the specific steps in detail.

[0063] Step 601: Obtain the receiving power of the NFC receiving device.

[0064] In practice, when the NFC transmitter is powered on, the controller can configure the voltage adjustment module (such as a DC-DC voltage regulator module) to output a preset voltage, which can be the operating voltage of the NFC reader chip.

[0065] In some embodiments, the NFC reader chip operates at 3V. Therefore, the controller adjusts the output voltage of the DC-DC voltage regulator module to 3V.

[0066] The controller configures a first NFC reader chip and a second NFC reader chip, and enables both the first NFC reader chip and the second NFC reader chip simultaneously.

[0067] When an NFC receiving device enters the radio frequency field of an NFC transmitting device, the NFC device can sense the radio frequency voltage. The NFC receiving device internally rectifies the radio frequency voltage to obtain sufficient energy to complete the initialization process and wait for the NFC transmitting device to send the target command.

[0068] The NFC transmitting device sends a target command to the NFC receiving device. Upon receiving the target command, the NFC receiving device sends a response message through its internal load modulation circuitry to establish communication with the NFC transmitting device.

[0069] In this embodiment of the invention, the controller can obtain the power and current of the response information sent by the NFC receiving device, and then determine the receiving power of the NFC receiving device.

[0070] Step 602: Adjust the transmission power of the near-field communication transmitting device based on the received power.

[0071] In this embodiment of the invention, the controller can determine whether the transmission power of the NFC transmitter needs to be adjusted based on the receiving power of the NFC receiving device.

[0072] In practice, if the controller determines that the transmission power of the NFC transmitting device needs to be adjusted, the controller can determine, based on the receiving power, to use M NFC reader / writer chips to send the target command.

[0073] Furthermore, the controller can adjust the input voltage of the M NFC reader chips based on the received power to adjust the transmission power of the NFC transmitter.

[0074] Specifically, the controller can adjust the output voltage of the voltage adjustment module, thereby adjusting the input voltage of the M NFC reader chips. Therefore, the output power of the M NFC reader chips is adjusted accordingly, thus adjusting the transmission power of the NFC transmitting device.

[0075] This invention also provides a computer-readable storage medium, which is a non-volatile or non-transient storage medium, storing a computer program thereon. When the computer program is run by a processor, it executes the steps of the near-field communication method provided in any of the above embodiments.

[0076] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by a program instructing related hardware. The program can be stored in a computer-readable storage medium, which may include ROM, RAM, disk, or optical disk, etc.

[0077] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A near-field communication transmitting device, characterized in that, include: The system includes a controller, an impedance matching module, a voltage divider module, a coil antenna, and N near-field communication reader chips, among which: The controller is coupled to the N near-field communication reader chips and is suitable for synchronously sending target commands using M near-field communication reader chips; N and M are both positive integers, and 1 < M ≤ N; The impedance matching module is coupled to the transmit ports of the N near-field communication reader chips and to the coil antenna. The voltage divider module is coupled to the receiving port of at least one near-field communication reader chip and to the coil antenna.

2. The near-field communication transmitting device as described in claim 1, characterized in that, Also includes: The clock module is coupled to the clock input terminals of the N near-field communication reader chips and is adapted to output clock signals to the N near-field communication reader chips.

3. The near-field communication transmitting device as described in claim 1, characterized in that, Also includes: A voltage adjustment module is coupled to the controller and the N near-field communication reader chips, and is adapted to receive the voltage adjustment signal output by the controller to adjust the input voltage of the N near-field communication reader chips.

4. The near-field communication transmitting device as described in claim 1, characterized in that, Among the M near-field communication reader chips, the i-th near-field communication reader chip includes a first transmitting port and a second transmitting port; the M first transmitting ports are coupled to the first input terminal of the impedance matching module, and the M second transmitting ports are coupled to the second input terminal of the impedance matching module; i is a positive integer and 1≤i≤M.

5. The near-field communication transmitting device as described in claim 1, characterized in that, The M near-field communication reader chips include a first part of near-field communication reader chips and a second part of near-field communication reader chips; wherein: The first part of the near-field communication reader chip has its first transmit port coupled to its second transmit port and coupled to the first input terminal of the impedance matching module; The second part of the near-field communication reader chip has a first transmit port coupled to its second transmit port and coupled to the second input terminal of the impedance matching module; the number of the first part of the near-field communication reader chip is equal to the number of the second part of the near-field communication reader chip; the signal input to the first input terminal of the impedance matching module is out of phase with the signal input to the second input terminal of the impedance matching module.

6. The near-field communication transmitting device as described in claim 4 or 5, characterized in that, The signal input to the first input terminal of the impedance matching module is out of phase with the signal input to the second input terminal of the impedance matching module.

7. The near-field communication transmitting device as described in claim 1, characterized in that, The controller is coupled to the N near-field communication reader chips via the same data bus.

8. A near-field communication method, characterized in that, Applied to the near-field communication transmitting device according to any one of claims 1 to 7, comprising: Obtain the receiving power of the near-field communication receiving device; Adjusting the transmission power of the near-field communication transmitting device based on the received power includes: using M near-field communication reader chips to send the target command.

9. The communication method as described in claim 8, characterized in that, Adjusting the transmission power of the near-field communication transmitting device based on the received power includes: Based on the received power, the input voltage of the M near-field communication reader chips is adjusted.

10. A computer-readable storage medium, wherein the computer-readable storage medium is a non-volatile storage medium or a non-transient storage medium, and a computer program is stored thereon, characterized in that, The computer program is executed by the processor to perform the steps of the near-field communication method according to claim 8 or 9.

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