Communication devices, chips and equipment

Abstract

The embodiments of this specification disclose a communication device, a chip and a device, including a first NFC tag, the first NFC tag is used to receive a radio frequency signal transmitted by an active NFC device, transmit an excitation signal, and sense the active NFC device to communicate and transmit first information according to the radio frequency signal transmitted by the active NFC device; and a controller, the controller is connected to the first NFC tag, and the controller is used to control the first NFC tag to transmit the excitation signal when it is determined that the active NFC device is not awakened from the LPCD mode according to the radio frequency signal transmitted by the active NFC device received by the first NFC tag. The embodiments of this specification can have a high success rate when communicating with a device in the LPCD mode.

Description

Technical Field

[0001] The embodiments of the present specification relate to the field of near field communication technology, and in particular, to a communication device, chip and equipment. Background Art

[0002] The birth of Near Field Communication (NFC) provides a good technical route for efficient contactless payment methods, allowing users to conveniently complete payment operations by bringing NFC-enabled terminal devices (such as mobile phones, tablets, etc.) close to the NFC sensing area of ​​payment devices that also have NFC capabilities.

[0003] At present, the terminal devices with NFC function used by users usually work in active mode during the payment process. And in order to reduce power consumption, the terminal devices usually enter the Low Power Card Detection (LPCD) mode after the NFC function turns on the active mode. However, when the terminal device in LPCD mode is close to the payment device for payment operation, the success rate of completing the communication interaction with the payment device to realize the payment operation is low.

[0004] Therefore, it is necessary to provide an NFC device with a higher success rate for communicating with a device in LPCD mode.

[0005] The content of the background technology section is only the information known to the inventor personally, and does not mean that the above information has entered the public domain before the application date of this disclosure, nor does it mean that it can become the prior art of the present disclosure. Summary of the invention

[0006] The embodiments of the present specification provide a communication device, a chip, and a device, which can have a high success rate when communicating with a device in LPCD mode.

[0007] In order to achieve the above purpose, the embodiments of this specification adopt the following technical solutions:

[0008] In a first aspect, an embodiment of the present specification provides a communication device, including: a first NFC tag, the first NFC tag being used to receive a radio frequency signal transmitted by an active NFC device, transmit an excitation signal, and induce the active NFC device to communicate and transmit first information according to the radio frequency signal transmitted by the active NFC device; and a controller, the controller being connected to the first NFC tag, the controller being used to control the first NFC tag to transmit the excitation signal when it is determined that the active NFC device is not awakened from the LPCD mode according to the radio frequency signal transmitted by the active NFC device received by the first NFC tag.

[0009] In a possible implementation, the first NFC tag includes a first NFC chip, a sampling circuit and a first antenna, the first antenna is connected to the first NFC chip and the sampling circuit respectively, the sampling circuit is connected to the controller, the sampling circuit is used to receive the radio frequency signal emitted by the active NFC device sensed by the first antenna, the first NFC chip is connected to the controller, the first NFC chip is used to emit the excitation signal through the first antenna and induce the active NFC device to communicate according to the radio frequency signal emitted by the active NFC device, and the first NFC chip is written with the first information.

[0010] In a possible implementation, the first antenna is connected to the first NFC chip through a matching circuit, and the matching circuit is used to match a resonant frequency of the first antenna with a frequency of a radio frequency signal transmitted by the active NFC device.

[0011] In a possible implementation manner, the first antenna includes a ground terminal, and the ground terminal is used to ground the first antenna.

[0012] In a possible implementation manner, the frequency band of the excitation signal includes the frequency of the radio frequency signal emitted by the active NFC device, and the width of the frequency band is less than or equal to a preset value.

[0013] In a possible implementation manner, the apparatus further includes: a second NFC tag, wherein the second NFC tag has a signal amplification capability and is configured to sense the active NFC device according to a radio frequency signal emitted by the active NFC device to communicate and transfer the first information.

[0014] In a possible implementation, the second NFC tag includes a second NFC chip and a second antenna connected to each other, the second NFC chip is connected to the controller, the second NFC chip is used to sense the active NFC device for communication according to a radio frequency signal transmitted by the active NFC device, and the second NFC chip is written with the first information.

[0015] In a possible implementation manner, the second NFC chip has an active load modulation capability.

[0016] In a possible implementation, the second NFC tag further includes an amplifier, the second NFC chip and the second antenna are connected via the amplifier, and the amplifier is used to amplify a signal output by the second NFC chip.

[0017] In a possible implementation manner, the resonant frequency of the second antenna matches the frequency of the radio frequency signal transmitted by the active NFC device.

[0018] In a possible implementation manner, the antenna of the second NFC tag and the antenna of the first NFC tag are arranged to overlap, and the antenna of the second NFC tag is spaced apart from the antenna of the first NFC tag by a preset distance.

[0019] In a possible implementation, one side of the antenna of the first NFC tag is used to sense the approaching active NFC device, and the antenna of the second NFC tag is located on the other side of the antenna of the first NFC tag.

[0020] In a possible implementation, the apparatus further includes at least one third NFC tag, a portion of an antenna of the at least one third NFC tag is coupled to the antenna of the first NFC tag and / or the second NFC tag, and another portion extends outward, and the at least one third NFC tag is used to enlarge the area of ​​a region in which radio frequency signals can be mutually induced between the first NFC tag and / or the second NFC tag and the active NFC device.

[0021] In a possible implementation, the at least one third NFC tag includes a third NFC chip and a third antenna connected to each other, the third NFC chip is connected to the controller, the third NFC chip is used to sense the active NFC device for communication according to the radio frequency signal emitted by the active NFC device, the third NFC chip is written with the first information, a portion of the third antenna is coupled to the antenna of the first NFC tag and / or the second NFC tag, and another portion extends outward.

[0022] In a possible implementation manner, a resonant frequency of the third antenna matches a frequency of a radio frequency signal transmitted by the active NFC device.

[0023] In a possible implementation, the at least one third NFC tag includes a fourth antenna, a portion of the fourth antenna is coupled to the antenna of the first NFC tag and / or the second NFC tag, and another portion extends outward, and a resonant frequency of the fourth antenna matches a frequency of a radio frequency signal transmitted by the active NFC device.

[0024] In a possible implementation manner, the controller is specifically configured to control the first NFC tag to transmit the excitation signal when the strength of the radio frequency signal transmitted by the active NFC device and received by the first NFC tag is lower than a preset threshold.

[0025] In a possible implementation manner, the controller is specifically configured to control the first NFC tag to transmit the excitation signal when the first NFC tag receives the radio frequency signal transmitted by the active NFC device and the first information is not read.

[0026] In a second aspect, an embodiment of this specification provides a communication chip, which is applied to a communication device. The communication chip includes a device as described in any one of the first aspect or possible implementations of the first aspect.

[0027] In a third aspect, an embodiment of this specification provides a communication device, comprising an apparatus as described in any one of the first aspect or possible implementations of the first aspect.

[0028] As can be seen from the above technical solutions, the communication device, chip and device provided in this specification can receive the radio frequency signal transmitted by the active NFC device, transmit the excitation signal and sense the active NFC device to communicate according to the radio frequency signal transmitted by the active NFC device through the first NFC tag set. Therefore, when the active NFC device is close to the communication device, the first NFC tag can receive the radio frequency signal transmitted by the active NFC device, so that the controller can determine whether the active NFC device is in LPCD mode and has not been awakened according to the received radio frequency signal transmitted by the active NFC device. Then, the communication device can use the first NFC tag to transmit the excitation signal when the active NFC device is in LPCD mode and has not been awakened by the controller, so as to stimulate the active NFC device through the excitation signal, so that the active NFC device can be awakened from the LPCD mode to the standard mode, so that the active NFC device can communicate with the communication device again in the standard mode. In this way, the active NFC device in the LPCD mode close to the communication device can be awakened in time, thereby avoiding the problem that the active NFC device fails to communicate with the communication device due to not being awakened, and improving the success rate of the communication device when communicating with the active NFC device.

[0029] Other functions of the communication device, chip and equipment provided in this specification will be partially listed in the following specification. The creative aspects of the communication device, chip and equipment provided in this specification can be fully explained by practicing or using the implementations described in the following detailed examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of an application scenario of a communication device provided in an embodiment of this specification;

[0031] Figure 2 A schematic diagram of an application scenario of another communication device provided in an embodiment of this specification;

[0032] Figure 3 A schematic diagram of the composition of a communication device provided in an embodiment of this specification;

[0033] Figure 4 A schematic diagram of the composition of a first NFC tag provided in an embodiment of this specification;

[0034] Figure 5 A schematic diagram of the composition of another first NFC tag provided in an embodiment of this specification;

[0035] Figure 6 A schematic diagram of another communication device provided in an embodiment of this specification;

[0036] Figure 7 A schematic diagram of the composition of a second NFC tag provided in an embodiment of this specification;

[0037] Figure 8 A schematic diagram of the composition of another second NFC tag provided in an embodiment of this specification;

[0038] Fig. 9 A schematic diagram of the positional relationship between a first antenna and a second antenna provided in an embodiment of this specification;

[0039] Fig.10 A schematic diagram of another communication device provided in an embodiment of this specification;

[0040] Fig.11 A schematic diagram of the composition of a third NFC tag provided in an embodiment of this specification; and

[0041] Fig.12 A schematic diagram of the position relationship of a first antenna, a second antenna, and a third antenna provided in an embodiment of this specification. DETAILED DESCRIPTION

[0042] The following description provides specific application scenarios and requirements of this specification, with the purpose of enabling those skilled in the art to make and use the contents of this specification. Various local modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but to the widest scope consistent with the claims.

[0043] The terms used herein are only used for the purpose of describing specific example embodiments and are not restrictive. For example, unless the context clearly indicates otherwise, as used herein, the singular forms "a", "an" and "the" may also include plural forms. When used in this specification, the terms "include", "comprise" and / or "contain" mean that the associated integers, steps, operations, elements and / or components exist, but do not exclude the existence of one or more other features, integers, steps, operations, elements, components and / or groups or that other features, integers, steps, operations, elements, components and / or groups may be added in the system / method.

[0044] In view of the following description, these and other features of the present specification, as well as the operation and function of the related elements of the structure, and the economy of the combination and manufacture of the parts can be significantly improved. Reference is made to the accompanying drawings, all of which form a part of this specification. However, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0045] The flowcharts used in this specification illustrate the operations implemented by the system according to some embodiments in this specification. It should be clearly understood that the operations of the flowcharts may not be implemented in sequence. On the contrary, the operations may be implemented in reverse order or simultaneously. In addition, one or more other operations may be added to the flowchart. One or more operations may be removed from the flowchart.

[0046] In this specification, "X includes at least one of A, B or C" means that X includes at least A, or X includes at least B, or X includes at least C. That is, X may include only any one of A, B, and C, or may include any combination of A, B, and C and other possible contents / elements at the same time. Any combination of A, B, and C may be A, B, C, AB, AC, BC, or ABC.

[0047] In this specification, unless explicitly stated otherwise, the association relationship between structures can be a direct association relationship or an indirect association relationship. For example, when describing "A is connected to B", unless it is explicitly stated that A is directly connected to B, it should be understood that A can be directly connected to B or indirectly connected to B; for another example, when describing "A is above B", unless it is explicitly stated that A is directly above B (AB is adjacent and A is above B), it should be understood that A can be directly above B or indirectly above B (AB is separated by other elements and A is above B). And so on.

[0048] The embodiments of this specification provide a communication device. The communication device can be used to sense an active NFC device close to its sensing area (usually the antenna coverage area), so as to communicate with the active NFC device. Among them, the communication device can be an NFC device working in passive mode, so as to passively respond to the radio frequency signals emitted by other active NFC devices, so that information can be read / written by the active NFC device. The active NFC device can be an NFC device working in active mode, so as to transmit radio frequency signals as a card reader to identify and read NFC devices or devices in passive mode. The active NFC device can be a dedicated NFC device, or it can be other electronic devices with NFC function, such as mobile phones, tablets, TVs, etc. with NFC function.

[0049] The communication device can be applied to scenarios involving NFC technology, such as payment through NFC technology, ordering food through NFC technology, information transmission through NFC technology, and device connection through NFC technology.

[0050] For example, take the scenario of payment through NFC technology as an example. Then the communication device can act as a passive NFC device to interact with an active NFC device. For example, Figure 1 As shown in (a) of FIG. 1 , when a user needs to pay, he or she can place his or her NFC-enabled mobile phone 101 (i.e., the NFC-enabled mobile phone is used as an active NFC device) close to a device (or tag) 102 provided by the merchant and including the communication device provided in the embodiment of this specification. Thus, the device 102 can sense the user's mobile phone 101 through the communication device and communicate with it to transmit payment information. Afterwards, as shown in FIG. Figure 1 As shown in (b) of FIG. 1 , the user's mobile phone 101 can display the corresponding payment page according to the payment information. When the user performs a payment operation on the mobile phone 101 according to the payment page (such as the user clicks the payment control "Confirm Payment" displayed on the payment page) and completes the payment, as shown in FIG. Figure 1 As shown in (c) in the figure, the user's mobile phone 101 can display the payment completion interface, thereby completing the user's payment to the merchant.

[0051] As another example, take the scenario of ordering food through NFC technology as an example. Then the communication device can act as a passive NFC device to interact with an active NFC device. For example, Figure 2 As shown in (a) of FIG. 1 , when a user needs to order food, he or she can place his or her NFC-enabled mobile phone 201 (i.e., the NFC-enabled mobile phone is used as an active NFC device) close to a device (or tag) 202 provided on the dining table and including the communication device provided in the embodiment of this specification. Thus, the device 202 can sense the user's mobile phone 201 through the communication device and communicate with it to transmit the order information. Then, as shown in FIG. Figure 2 As shown in (b) of FIG. 1 , the user's mobile phone 201 can display the corresponding ordering page according to the ordering information. After the user completes the ordering operation according to the ordering page on the mobile phone 201 (for example, the user selects "item 1" and "item 3" on the ordering page and clicks the control "confirm selection" for confirming the order), as shown in FIG. Figure 2 As shown in (c) in the figure, the user's mobile phone 201 can display the order completion interface, thereby completing the user's convenient ordering operation.

[0052] The communication device provided in this specification can be applied to various devices so that it can be used as a communication device for NFC communication. The device to which the communication device can be applied can be a payment device in an application and payment scenario, or a food ordering device in a food ordering scenario, or other devices requiring NFC capabilities, such as various terminal devices requiring NFC capabilities, etc., which are not limited here. Among them, the communication device can be applied to the device in such a way that the communication device is set to a corresponding circuit and configured in the device, or the communication device can be packaged as a chip and configured in the device as a communication chip, etc., which are not limited here. Moreover, when the communication device is packaged as a chip, it can be packaged into other communication chips, or it can be packaged as an independent chip, which is also not limited here.

[0053] It should be noted that the above-mentioned terminal devices may also be referred to as terminals, user equipment (UE), mobile stations (MS), mobile terminals (MT), etc. The terminal devices may be mobile phones, smart TVs, wearable devices, tablet computers (Pad), computers with wireless transceiver functions, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal devices.

[0054] Of course, in some other possible implementations of the embodiments of this specification, the communication device can also be configured as an independent device, such as packaging the communication device and using it as an NFC card or tag.

[0055] The communication device in the embodiments of this specification will be described below by way of example with reference to the accompanying drawings.

[0056] Figure 3 A schematic diagram of the composition of a communication device provided in an embodiment of this specification is shown.

[0057] like Figure 3As shown, the communication device may include a first NFC tag 310 and a controller 300 .

[0058] The first NFC tag 310 can be used to receive a radio frequency signal transmitted by an active NFC device, transmit an excitation signal, and sense the active NFC device to communicate and transmit the first information according to the radio frequency signal transmitted by the active NFC device. The controller 300 is connected to the first NFC tag 310, and the controller 300 is used to control the first NFC tag 310 to transmit the excitation signal when it is determined that the active NFC device has not been awakened from the LPCD mode according to the radio frequency signal transmitted by the active NFC device received by the first NFC tag 310.

[0059] Among them, the first information can be the payment information in the aforementioned payment scenario, or the ordering information in the ordering scenario, etc. According to the specific application scenario, the first information can be adaptively configured.

[0060] It should be noted that the active NFC device can act as a card reader, transmitting radio frequency signals to identify and read NFC devices or devices in passive mode. The communication device provided in the embodiments of this specification can be a device that works in passive mode and can passively respond to the radio frequency signal transmitted by the active NFC device to communicate, so as to transmit the first information to the active NFC device so that the active NFC device can perform corresponding operations according to the first information.

[0061] In order to save power consumption, active NFC devices usually enter LPCD mode after a short period of time after the NFC function is activated. In this LPCD mode, the amplitude of the RF signal emitted by the active NFC device will be lower than that in the standard mode. When the active NFC device receives the RF signal it emits, and the intensity change caused by the NFC device or device in the passive mode it is close to is greater than or equal to the preset threshold, the active NFC device will wake up from the LPCD mode and enter the standard mode.

[0062] The connection between the controller 300 and the first NFC tag 310 may be an electrical connection, so as to realize the control of the first NFC tag 310 by the controller 300 and the information transmission between the first NFC tag 310 and the controller 300 .

[0063] For the communication device, when the active NFC device approaches the communication device and transmits a radio frequency signal for card detection, the communication device can receive the radio frequency signal through the first NFC tag 310 and send the radio frequency signal to the controller 300. Therefore, the controller 300 can determine whether the active NFC device has not been awakened from the LPCD mode based on the radio frequency signal. If so, the controller 300 can control the first NFC tag 310 to transmit an excitation signal so that the active NFC device can sense the excitation signal, thereby superimposing the intensity of the excitation signal on the intensity change generated after the first NFC tag 310 senses the radio frequency signal emitted by the active NFC device, so that the superimposed intensity change can be higher than the threshold used to wake up the active NFC device from the LPCD mode, thereby waking up the active NFC device. So that the active NFC device can identify and communicate with the communication device again in the standard mode.

[0064] Optionally, in the embodiments of the present specification, in order to be able to better wake up the active NFC device in LPCD mode through an excitation signal. The frequency band of the excitation signal can be set to a frequency band that includes the frequency of the radio frequency signal emitted by the active NFC device and whose width is less than or equal to a preset value. For example, taking the frequency of the radio frequency signal emitted by the active NFC device as 13.56MHz, the frequency band of the excitation signal can be set to a frequency band near 13.56MHz. For example, the 12MHz-14MHz frequency band, etc. Of course, in actual applications, the smaller the width of the frequency band of the excitation signal (that is, the closer the frequency of the excitation signal is to the frequency of the radio frequency signal emitted by the active NFC device), the better the wake-up effect of the excitation signal on the active NFC device, and the frequency band of the excitation signal can be set according to actual conditions.

[0065] As a possible implementation, the controller 300 determines that the active NFC device has not been awakened from the LPCD mode based on the radio frequency signal emitted by the active NFC device. The controller 300 may determine that the active NFC device has not been awakened from the LPCD mode when it determines that the strength of the radio frequency signal emitted by the active NFC device is lower than a preset threshold. That is, the controller 300 may control the first NFC tag 310 to emit an excitation signal when the strength of the radio frequency signal emitted by the active NFC device received by the first NFC tag 310 is lower than the preset threshold. Among them, the preset threshold may be lower than the strength of the radio frequency signal emitted by the active NFC device in the standard mode, and higher than the strength of the radio frequency signal emitted by the active NFC device in the LPCD mode. Of course, in actual applications, the preset threshold may also be set to be equal to the strength of the radio frequency signal emitted by the active NFC device in the standard mode, or equal to the strength of the radio frequency signal emitted by the active NFC device in the LPCD mode. The specific value of the preset threshold may be set according to the above range in combination with actual conditions, and is not limited here. It should be noted that when the preset threshold is a value lower than the strength of the radio frequency signal emitted by the active NFC device in the standard mode, in actual applications, the controller 300 can also determine that the active NFC device has not been awakened from the LPCD mode when it is determined that the strength of the radio frequency signal emitted by the active NFC device is equal to the preset threshold.

[0066] As another possible implementation, when the first NFC tag 310 receives the radio frequency signal transmitted by the active NFC device, the controller 300 may determine that an active NFC device is close to the above-mentioned communication device provided in the embodiment of this specification according to the radio frequency signal. At this time, if the information (such as the first information) contained in the first NFC tag 310 that can be transmitted to the active NFC device is not read, it means that the NFC device has not been awakened from the LPCD mode and has not successfully detected the first NFC tag 310, the communication between the active NFC device and the communication device provided in the embodiment of this specification fails, and the active NFC device has not read the first information of the first NFC tag 310. Therefore, the way in which the controller 300 determines that the active NFC device has not been awakened from the LPCD mode according to the radio frequency signal transmitted by the active NFC device may be that the controller 300 determines that the active NFC device has not been awakened from the LPCD mode when it determines that the radio frequency signal transmitted by the active NFC device has been received and the information (such as the first information) of the first NFC tag 310 has not been read. That is, the controller 300 can control the first NFC tag 310 to transmit an excitation signal when the first NFC tag 310 receives a radio frequency signal transmitted by an active NFC device and information (such as the first information) that the first NFC tag 310 can transmit to the active NFC device is not read.

[0067] In the embodiment of the present specification, the first NFC tag 310 in the communication device can realize the function of receiving the radio frequency signal transmitted by the active NFC device and transmitting the excitation signal by setting the radio frequency transmitting circuit and the radio frequency receiving circuit. And by setting the NFC chip containing the above-mentioned first information, the first NFC tag 310 can realize the function of containing the first information and being able to sense the active NFC device to communicate with the active NFC device according to the radio frequency signal transmitted by the active NFC device.

[0068] Of course, in the embodiment of this specification, the first NFC tag 310 can also realize the function of receiving the radio frequency signal transmitted by the active NFC device by setting a sampling circuit.

[0069] For example, combined with Figure 4 As shown, the first NFC tag 310 may include a first NFC chip 311, a sampling circuit 312, and a first antenna 313. The first antenna 313 may be connected to the first NFC chip 311 and the sampling circuit 312, respectively. The sampling circuit 312 may also be connected to the controller 300, and the first NFC chip 311 may also be connected to the controller 300.

[0070] Among them, the sampling circuit 312 can be a voltage sampling circuit and / or a current sampling circuit. The sampling circuit 312 can receive the radio frequency signal emitted by the active NFC device by collecting the voltage and / or current generated after the first antenna 313 senses the radio frequency signal emitted by the active NFC device. Thus, the first NFC tag 310 can receive the radio frequency signal emitted by the active NFC device sensed by the first antenna 313 through the sampling circuit 312, and send the radio frequency signal to the controller 300 through the sampling circuit 312. So that the controller 300 can determine whether the active NFC device has not been awakened from the LPCD mode based on the radio frequency signal.

[0071] Optionally, in the embodiment of the present specification, the first antenna 313 may be provided with a ground terminal in addition to the terminal for connecting to the sampling circuit 312 and the first NFC chip 311, so as to ground the first antenna 313. This can eliminate some noise in the signal sensed by the first antenna 313, and improve the quality of the radio frequency signal received by the sampling circuit 312, so that the controller 300 can better determine whether the active NFC device has not been awakened from the LPCD mode according to the received radio frequency signal.

[0072] As an example, the first NFC chip 311 can be an NFC chip with both active mode and passive mode. Thus, the first NFC tag 310 can use the active mode of the first NFC chip 311 to transmit an excitation signal through the first antenna 313, and use the passive mode of the first NFC chip 311 to sense the radio frequency signal emitted by the active NFC device to communicate with the active NFC device to transmit the first information. Accordingly, the first information can be written into the first NFC chip 311.

[0073] The above method is used to implement the first NFC tag 310 receiving radio frequency signals, transmitting excitation signals, and sensing radio frequency signals of active NFC devices to communicate and transfer the first information. The structure is relatively simple, which can facilitate the integration and miniaturization of the first NFC tag 310.

[0074] For example, in the embodiments of this specification, the resonant frequency of the antenna of the first NFC tag 310, such as the first antenna 313 described above, may be a frequency that matches (e.g., is the same as or close to) the frequency of the radio frequency signal emitted by the active NFC device, so that the first NFC tag 310 can better receive and sense the radio frequency signal emitted by the active NFC device.

[0075] For example, the frequency of the radio frequency signal transmitted by the active NFC device may be 13.56 MHz, and therefore, the frequency tuned to the first antenna 313 may be 13.56 MHz or a frequency close to this frequency.

[0076] In practical applications, as a possible implementation method, Figure 5 As shown, in the first NFC tag 310, a matching circuit 314 may be connected between the first antenna 313 and the first NFC chip 311, so as to adjust the resonant frequency of the first antenna 313 to a corresponding frequency through the matching circuit 314. The matching circuit 314 may be a circuit including a capacitor, so that the matching circuit 314 and the first antenna 313 can form an LC circuit. At this time, the resonant frequency of the first antenna 313 is related to the inductance of the first antenna 313 and the equivalent capacitance of the matching circuit 314, so that the resonant frequency of the first antenna 313 can be adjusted by adjusting the capacitance in the matching circuit 314, so as to tune the first antenna 313 to a corresponding frequency.

[0077] Optionally, combined Figure 6 As shown, in the communication device provided in the embodiment of this specification, a second NFC tag 320 may also be included. The second NFC tag 320 may be connected to the controller 300.

[0078] Among them, the second NFC tag 320 can be an NFC tag with signal amplification capability. Thus, the second NFC tag 320 can sense the active NFC device according to the radio frequency signal emitted by the active NFC device to communicate with it and transmit the above-mentioned first information. That is, the second NFC tag 320 can communicate with the active NFC device with a stronger signal to transmit the same information as the first NFC tag 310 (i.e., the first information), thereby improving the signal strength and signal coverage when the communication device communicates with the active NFC device to transmit the first information, and further improving the success rate of communication between the communication device and the active NFC device.

[0079] For example, the second NFC tag 320 may implement signal amplification by adopting an NFC chip with signal amplification capability, or by providing an amplifier or an amplification circuit, which is not limited here.

[0080] For example, as a possible implementation, combining Figure 7 As shown, the second NFC tag 320 may include a second NFC chip 321 and a second antenna 322 connected to each other. The second NFC chip 321 may be connected to Figure 6 , and the first information can be written in the second NFC chip 321. Thus, the radio frequency signal emitted by the active NFC device can be sensed by the second antenna 322, and the second NFC chip 321 senses the active NFC device to communicate according to the radio frequency signal emitted by the active NFC device to transmit the first information. That is, the first information can be written in the second NFC chip 321, and the second NFC chip 321 can be operated in the passive mode through the controller 300. Of course, the second NFC chip 321 can also be an NFC chip that only supports the passive mode, which is not limited here.

[0081] The second NFC chip 321 can be an NFC chip with active load modulation capability, so that the signal amplification capability of the second NFC tag 320 can be realized through the second NFC chip 321. Among them, the NFC chip with active load modulation capability can actively transmit a subcarrier for carrying the first information according to the radio frequency signal of the active NFC device after sensing the radio frequency signal transmitted by the active NFC device, so that the active NFC device receives the subcarrier to complete the communication and transfer information. Since the NFC chip with active load modulation capability can actively transmit the subcarrier, the signal strength of the subcarrier can be higher than the strength of the subcarrier generated by the passive response to the radio frequency signal transmitted by the active NFC device, thereby realizing signal amplification during the communication between the NFC chip and the active NFC device.

[0082] For example, as another possible implementation, based on Figure 7The second NFC tag 320 shown, combined with Figure 8 As shown, the second NFC tag 320 may further include an amplifier 323 connected between the second NFC chip 321 and the second antenna 322. That is, the second NFC chip 321 and the second antenna 322 may be connected via the amplifier 323. The amplifier 323 may be a signal amplifier or a power amplifier, which may amplify the signal output by the second NFC chip 321 to transmit it through the second antenna 322, thereby realizing the signal amplification capability of the second NFC tag 320. The selection and specific configuration of the amplifier 323 may be set according to actual conditions, and are not limited here, as long as the signal output by the second NFC chip 321 can be amplified.

[0083] For example, in the embodiments of this specification, the resonant frequency of the antenna of the second NFC tag 320, such as the second antenna 322 described above, may be a frequency that matches (e.g., is the same as or close to) the frequency of the radio frequency signal emitted by the active NFC device, so that the second NFC tag 320 can better sense the radio frequency signal emitted by the active NFC device.

[0084] For example, the frequency of the radio frequency signal transmitted by the active NFC device may be 13.56 MHz, and thus the frequency tuned to by the second antenna 322 may be 13.56 MHz or a frequency close to this frequency.

[0085] In practical applications, as a possible implementation, a matching circuit may be connected between the second antenna 322 and the second NFC chip 321 to adjust the resonant frequency of the second antenna 322 to a corresponding frequency through the matching circuit. The matching circuit may be a circuit including a capacitor, so that the matching circuit and the second antenna 322 form an LC circuit. At this time, the resonant frequency of the second antenna 322 is related to the inductance of the second antenna 322 and the equivalent capacitance of the matching circuit, so that the resonant frequency of the second antenna 322 can be adjusted by adjusting the capacitance in the matching circuit to tune the second antenna 322 to a corresponding frequency.

[0086] For example, in the embodiments of this specification, combined with Fig. 9 As shown, the antenna of the second NFC tag 320 (such as the second antenna 322) can be arranged to overlap with the antenna of the first NFC tag 310 (such as the first antenna 313). In addition, the antenna of the second NFC tag 320 and the antenna of the first NFC tag 310 can be spaced apart by a preset distance. The preset distance can be set according to actual conditions to reduce the mutual inductance interference between the antenna of the first NFC tag 310 and the antenna of the second NFC tag 320. For example, the preset distance can be 1 cm, or other distances greater than 1 cm or less than 1 cm.

[0087] In this way, the area occupied by the antenna arrangement can be saved by overlapping the antennas, thereby reducing the space occupied by the communication device provided in the embodiment of this specification, facilitating the miniaturization of the communication device, and enabling the antenna of the first NFC tag 310 and the antenna of the second NFC tag 320 to be superimposed and coupled, thereby increasing the load when the active NFC device senses the communication device, making it easier for the active NFC device to wake up from the LPCD mode, and improving the success rate of communication between the communication device and the active NFC device. In addition, the mutual inductance interference between the antenna of the first NFC tag 310 and the antenna of the second NFC tag 320 can be reduced by the spacing between the antennas of the two NFC tags.

[0088] Optionally, in actual application, continue to refer to Fig. 9 As shown, one side of the antenna (such as the first antenna 313) of the first NFC tag 310 can be used to sense the approaching active NFC device. The antenna (such as the second antenna 322) of the second NFC tag 320 can be set on the other side of the antenna of the first NFC tag 310 (that is, the side of the antenna of the first NFC tag 310 away from the active NFC device). Since the second NFC tag 320 has the signal amplification capability, setting the antenna of the second NFC tag 320 on the other side of the antenna of the first NFC tag 310 can save the area occupied by the antenna arrangement while ensuring the normal performance of the second NFC tag 320 and the first NFC tag 310.

[0089] Optionally, combined Fig.10 As shown, in the communication device provided in the embodiment of this specification, at least one third NFC tag 330 may also be included (two third NFC tags are shown as an example in the figure). The third NFC tag 330 may be connected to the controller 300 or not, which is not limited here.

[0090] Among them, the antenna of the third NFC tag 330 can be partially coupled with the antenna of the first NFC tag 310 and / or the second NFC tag 320, and the other part can extend outward. Through the third NFC tag 330, the area of ​​the area where the first NFC tag 310 and / or the second NFC tag 320 and the active NFC device can sense each other's radio frequency signals can be enlarged, that is, the regional coverage of the communication device provided in the embodiment of this specification sensing the active NFC device is expanded, thereby improving the adaptability of the communication device to various active NFC devices with different antenna positions, and improving the success rate of communication and information transmission between the communication device and the active NFC device. In addition, through the antenna of the third NFC tag 330, the load when the active NFC device senses the communication device can be increased on the basis of the first NFC tag 310 and the second NFC tag 320, so that the active NFC device can be more easily awakened from the LPCD mode.

[0091] For example, combined with Fig.11 As shown, the third NFC tag 330 may include a third NFC chip 331 and a third antenna 332 connected to each other. The third NFC chip 331 may be connected to Fig.10 , and the third NFC chip 331 can be written with the above-mentioned first information. Thus, the radio frequency signal emitted by the active NFC device can be sensed by the third antenna 332, and the third NFC chip 331 can sense the active NFC device to communicate according to the radio frequency signal emitted by the active NFC device to transmit the above-mentioned first information. That is, the first information can be written in the third NFC chip 331, and the third NFC chip 331 can be operated in passive mode through the controller 300. Of course, the third NFC chip 331 can also be an NFC chip that only supports passive mode, which is not limited here. In this way, the third NFC tag 330 can expand the regional coverage of the communication device sensing the active NFC device, and can also sense the active NFC device to communicate and transmit the first information, thereby improving the success rate of communication and information transmission between the communication device and the active NFC device.

[0092] Of course, in the embodiments of this specification, the third NFC tag 330 may not include an NFC chip, such as the third NFC tag 330 includes a fourth antenna. Thus, the fourth antenna is used as a relay to expand the area of ​​the area where the antenna of the first NFC tag 310 and / or the second NFC tag 320 and the active NFC device can sense radio frequency signals with each other.

[0093] In some other possible implementations, in combination with the above example, some of the third NFC tags 330 are configured to include a third NFC chip 331 and a third antenna 332 , and others are configured to include a fourth antenna.

[0094] For example, in the embodiments of this specification, the resonant frequency of the antenna of the third NFC tag 330, such as the third antenna 332 or the fourth antenna mentioned above, can be a frequency that matches (such as the same as or close to) the frequency of the radio frequency signal emitted by the active NFC device, so that the third NFC tag 330 can better sense the radio frequency signal emitted by the active NFC device.

[0095] For example, the frequency of the radio frequency signal transmitted by the active NFC device may be 13.56 MHz, and therefore, the frequency tuned to the third antenna 332 or the fourth antenna may be 13.56 MHz or a frequency close to this frequency.

[0096] In practical applications, as a possible implementation, a matching circuit may be connected between the third antenna 332 and the third NFC chip 331 to adjust the resonant frequency of the third antenna 332 to the corresponding frequency through the matching circuit. The matching circuit may be a circuit including a capacitor, so that the matching circuit can form an LC circuit with the third antenna 332. At this time, the resonant frequency of the third antenna 332 is related to the inductance of the third antenna 332 and the equivalent capacitance of the matching circuit, so that the resonant frequency of the third antenna 332 can be adjusted by adjusting the capacitance in the matching circuit to tune the third antenna 332 to the corresponding frequency. Alternatively, a matching circuit connected to the fourth antenna may be provided to adjust the resonant frequency of the fourth antenna to the corresponding frequency through the matching circuit. The matching circuit may be a circuit including a capacitor, so that the matching circuit can form an LC circuit with the fourth antenna. At this time, the resonant frequency of the fourth antenna is related to the inductance of the fourth antenna and the equivalent capacitance of the matching circuit, so that the resonant frequency of the fourth antenna can be adjusted by adjusting the capacitance in the matching circuit to tune the fourth antenna to the corresponding frequency.

[0097] For example, a portion of the antenna of the third NFC tag 330 is coupled with the antenna of the first NFC tag 310 and / or the second NFC tag 320, and another portion thereof extends outward. The antenna of each third NFC tag 330 may be coupled with a portion of the antenna of the first NFC tag 310, and another portion thereof extends outward. Alternatively, the antenna of each third NFC tag 330 may be coupled with a portion of the antenna of the second NFC tag 320, and another portion thereof extends outward. Alternatively, the antenna of each third NFC tag 330 may be coupled with a portion of the antenna of the first NFC tag 310 and a portion of the antenna of the second NFC tag 320, and another portion thereof extends outward. Alternatively, some of the third NFC tags 330 may be coupled with a portion of the antenna of the first NFC tag 310, and another portion thereof extends outward, while others may be coupled with a portion of the antenna of the second NFC tag 320, and another portion thereof extends outward.

[0098] For example, the antenna of the first NFC tag 310 (such as the first antenna 313) and the antenna of the second NFC tag 320 (such as the second antenna 322) are overlapped, and two third NFC tags 330 are provided, and the antenna of each third NFC tag 330 (such as the third antenna 332 or the fourth antenna, and the third antenna 332 will be used as an example below) is coupled with the antenna of the first NFC tag 310 and the antenna of the second NFC tag 320, and the other part is extended outward. Fig.12As shown, the antennas of the two third NFC tags 330 (such as the third antenna 332) can be respectively located between the antenna of the first NFC tag 310 (such as the first antenna 313) and the antenna of the second NFC tag 320 (such as the second antenna 322), and the antennas of the two third NFC tags 330 (such as the third antenna 332) are coplanar, and both have a portion coupled with the antenna of the first NFC tag 310 (such as the first antenna 313) and the antenna of the second NFC tag 320 (such as the second antenna 322), and the remaining portion extends outside the antenna of the first NFC tag 310 (such as the first antenna 313) and the antenna of the second NFC tag 320 (such as the second antenna 322). In this way, the antenna of the third NFC tag 330 can simultaneously relay the antenna of the first NFC tag 310 and the antenna of the second NFC tag 320, so as to simultaneously expand the area where the first NFC tag 310 and the second NFC tag 320 sense the radio frequency signal of the active NFC device, and improve the sensing sensitivity of the first NFC tag 310 and the second NFC tag 320 to the active NFC device.

[0099] By using the communication device in the above embodiment, the first NFC tag 310 can be set to receive the radio frequency signal transmitted by the active NFC device, transmit the excitation signal, and sense the active NFC device according to the radio frequency signal transmitted by the active NFC device to communicate. Therefore, when the active NFC device is close to the communication device, the first NFC tag 310 can receive the radio frequency signal transmitted by the active NFC device, so that the controller 300 can determine whether the active NFC device is in the LPCD mode and has not been awakened according to the received radio frequency signal transmitted by the active NFC device. Then, the communication device can use the first NFC tag 310 to transmit the excitation signal when the active NFC device is in the LPCD mode and has not been awakened, so as to stimulate the active NFC device through the excitation signal, so that the active NFC device can be awakened from the LPCD mode to the standard mode, so that the active NFC device can communicate with the communication device again in the standard mode. In this way, the active NFC device in the LPCD mode close to the communication device can be awakened in time, thereby avoiding the problem that the active NFC device fails to communicate with the communication device due to not being awakened, and improving the success rate of the communication device when communicating with the active NFC device.

[0100] Corresponding to the communication device in the aforementioned embodiment, the embodiment of this specification further provides a communication chip. The communication chip may include the communication device in the aforementioned embodiment, and may be applied to a communication device, so that the communication device can sense the active NFC device when the active NFC device is close to communicate with it to transfer information. Moreover, the communication device can actively wake up the active NFC device through an excitation signal when the active NFC device is not awakened from the LPCD mode to improve the success rate of communication between the communication device and the active NFC device.

[0101] In addition, the embodiments of this specification also provide a communication device, which may include the communication device in the aforementioned embodiments. The communication device may be configured on the communication device in the form of the aforementioned communication chip, and may also be configured on the communication device in other NFC implementation forms such as module form, card form, tag form, printed circuit form, etc., which are not limited here. The communication device can sense the active NFC device when the active NFC device is close to communicate with it to transfer information. Moreover, the communication device can actively wake up the active NFC device through an excitation signal when the active NFC device is not awakened from the LPCD mode to improve the success rate of communication between it and the active NFC device.

[0102] In summary, after reading this detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure may be presented only by way of example and may not be limiting. Although not explicitly stated herein, those skilled in the art will appreciate that this specification requires various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by this specification and are within the spirit and scope of the exemplary embodiments of this specification.

[0103] In addition, certain terms in this specification have been used to describe embodiments of this specification. For example, "one embodiment", "an embodiment" and / or "some embodiments" mean that a particular feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of this specification. Therefore, it can be emphasized and should be understood that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various parts of this specification do not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics may be appropriately combined in one or more embodiments of this specification.

[0104] It should be understood that in the foregoing description of the embodiments of this specification, in order to help understand a feature and for the purpose of simplifying this specification, this specification combines various features in a single embodiment, figure or its description. However, this does not mean that the combination of these features is necessary. When reading this specification, it is entirely possible for a person skilled in the art to mark out some of the devices as separate embodiments. In other words, the embodiments in this specification can also be understood as the integration of multiple secondary embodiments. This is also true when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0105] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, articles, etc., cited herein may be incorporated herein by reference. For example, if there is any inconsistency or conflict between the description, definition, and / or use of a term associated with any of the incorporated materials and the terminology, description, definition, and / or use associated with this document, the terminology in this document shall prevail.

[0106] Finally, it should be understood that the embodiments of the application disclosed herein are explanations of the principles of the embodiments of this specification. Other modified embodiments are also within the scope of this specification. Therefore, the embodiments disclosed in this specification are only used as examples and not as limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in this specification to implement the applications in this specification. Therefore, the embodiments of this specification are not limited to the embodiments accurately described in the application.

Claims

1. A communication device, used in payment scenarios, comprising: A first NFC tag receives a radio frequency signal transmitted by an active NFC device, wherein the active NFC device acts as a card reader to transmit the radio frequency signal to identify the communication device in the passive mode; as well as A controller is connected to the first NFC tag and is configured to: Determining, according to the radio frequency signal, that the active NFC device is in a low power consumption card detection (LPCD) mode, transmitting an excitation signal via the first NFC tag to wake up the active NFC device from the LPCD mode, and First information is sent to the active NFC device through the first NFC tag to facilitate a payment operation, wherein the first information is related to payment.

2. The device according to claim 1, wherein: The first information is used to enable the active NFC device to display a payment page, and the payment page is used to perform the payment operation.

3. The device according to claim 1, wherein: The first NFC tag includes a first NFC chip, a sampling circuit and a first antenna, the first antenna is connected to the first NFC chip and the sampling circuit respectively, the sampling circuit is connected to the controller, the sampling circuit is used to receive the radio frequency signal emitted by the active NFC device sensed by the first antenna, the first NFC chip is connected to the controller, the first NFC chip is used to emit the excitation signal through the first antenna and induce the active NFC device to communicate according to the radio frequency signal emitted by the active NFC device, and the first information is written on the first NFC chip.

4. The device according to claim 3, wherein: The first antenna is connected to the first NFC chip through a matching circuit, and the matching circuit is used to match the resonant frequency of the first antenna with the frequency of the radio frequency signal transmitted by the active NFC device.

5. The device according to claim 3, wherein: The first antenna includes a ground terminal, and the ground terminal is used to ground the first antenna.

6. The device according to claim 1, wherein: The frequency band of the excitation signal includes the frequency of the radio frequency signal emitted by the active NFC device, and the width of the frequency band is less than or equal to a preset value.

7. The device according to claim 1, wherein: The device also includes: The second NFC tag has a signal amplification capability and is used to sense the active NFC device according to the radio frequency signal emitted by the active NFC device to communicate and transfer the first information.

8. The device according to claim 7, wherein: The second NFC tag includes a second NFC chip and a second antenna connected to each other, the second NFC chip is connected to the controller, the second NFC chip is used to sense the active NFC device for communication according to the radio frequency signal emitted by the active NFC device, and the first information is written on the second NFC chip.

9. The device according to claim 8, wherein: The second NFC chip has active load modulation capability.

10. The device according to claim 8, wherein: The second NFC tag further includes an amplifier, through which the second NFC chip and the second antenna are connected, and the amplifier is used to amplify a signal output by the second NFC chip.

11. The device according to claim 8, wherein: The resonant frequency of the second antenna matches the frequency of the radio frequency signal transmitted by the active NFC device.

12. The device according to claim 7, wherein: The antenna of the second NFC tag and the antenna of the first NFC tag are arranged to overlap, and the antenna of the second NFC tag is spaced apart from the antenna of the first NFC tag by a preset distance.

13. The device according to claim 12, wherein: One side of the antenna of the first NFC tag is used to sense the approaching active NFC device, and the antenna of the second NFC tag is located on the other side of the antenna of the first NFC tag.

14. The device according to claim 7, wherein: The device also includes at least one third NFC tag, a portion of an antenna of the at least one third NFC tag is coupled to the antenna of the first NFC tag and / or the second NFC tag, and another portion extends outward, and the third NFC tag is used to enlarge the area of ​​a region where radio frequency signals are mutually induced between the first NFC tag and / or the second NFC tag and the active NFC device.

15. The device according to claim 14, wherein: The at least one third NFC tag includes a third NFC chip and a third antenna connected to each other, the third NFC chip is connected to the controller, the third NFC chip is used to sense the active NFC device for communication according to the radio frequency signal emitted by the active NFC device, the third NFC chip is written with the first information, a portion of the third antenna is coupled to the antenna of the first NFC tag and / or the second NFC tag, and another portion extends outward.

16. The device according to claim 15, wherein: The resonant frequency of the third antenna matches the frequency of the radio frequency signal transmitted by the active NFC device.

17. The device according to claim 14, wherein: The at least one third NFC tag includes a fourth antenna, a portion of which is coupled to the antenna of the first NFC tag and / or the second NFC tag, and another portion of which extends outward, and a resonant frequency of the fourth antenna matches a frequency of a radio frequency signal emitted by the active NFC device.

18. The device according to claim 1, wherein: The controller is specifically configured to control the first NFC tag to transmit the excitation signal when the intensity of the radio frequency signal transmitted by the active NFC device and received by the first NFC tag is lower than a preset threshold.

19. The device according to claim 1, wherein: The controller is specifically configured to control the first NFC tag to transmit the excitation signal when the first NFC tag receives the radio frequency signal transmitted by the active NFC device and the first information is not read.

20. A communication device, used in a food ordering scenario, comprising: A first NFC tag receives a radio frequency signal transmitted by an active NFC device, wherein the active NFC device acts as a card reader to transmit the radio frequency signal to identify the communication device in the passive mode; as well as A controller, connected to the first NFC tag, is configured to: Determining, based on the radio frequency signal, that the active NFC device is in LPCD mode, transmitting an excitation signal via the first NFC tag to wake up the active NFC device from the LPCD mode, and First information is sent to the active NFC device through the first NFC tag to promote the ordering operation, where the first information is related to the ordering.

21. The device according to claim 20, wherein: The first information is used to enable the active NFC device to display an ordering page, and the ordering page is used to perform the ordering operation.

22. A communication chip, applied to a communication device, the communication chip comprising the communication device according to any one of claims 1 to 21.

23. A communication device, comprising the communication apparatus according to any one of claims 1 to 21.

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