A dual-antenna based switchable multi-functional nfc tag assembly and method

Abstract

The application discloses a kind of based on dual-antenna switchable multifunctional NFC label assembly and method, suitable for being attached to the back of body equipment with NFC function.The assembly includes the first antenna corresponding to the position of equipment NFC emission area, and the second antenna away from the emission area;At least two NFC label chips storing independent information;And the first switch and the second switch connected with each chip.The first switch is used to connect the first antenna with the corresponding chip, to form the first NFC label that can be read by body equipment;The second switch is used to connect the second antenna with the corresponding chip, to form the second NFC label that can be read by external equipment.By triggering different switches, information can be sent to body equipment through the first antenna, or communicate with external equipment through the second antenna, realize the physical isolation and interference-free switching of internal and external communication mode, so that the label can be integrated in the equipment, without time incubation, quick interaction when needed, improve the convenience and scene adaptability.

Description

Technical Field

[0001] This invention relates to the field of electronic communication technology, and more specifically, to a switchable multi-functional NFC tag component and method based on dual antennas. Background Technology

[0002] Near Field Communication (NFC) tags, as a convenient information exchange carrier, have been widely used in scenarios such as quick payments, access control, and one-click application launch. Traditional NFC tags typically use a fixed structure with a single antenna chip, resulting in limited functionality. When users need multiple tags with different functions, they have to carry multiple separate entities, causing inconvenience and making them prone to loss. A more prominent problem is that if such tags are attached to devices with continuous NFC signal transmission capabilities, such as mobile phones, for extended periods, the tags will be repeatedly activated due to the continuous coupling state. This not only causes unnecessary signal interference and power consumption for the host device but also makes it impossible to effectively control the tag between standby and active states.

[0003] Existing composite tag solutions often focus on integrating multiple independent tag units within a limited space, failing to fundamentally solve the signal interference and physical isolation problems between the tag and the host device, and between the tag serving internal communication with the host device and external communication with external devices. Achieving coexistence, interference-free switching, and precise communication path selection for multiple NFC functions within a highly integrated, lightweight component remains a technological challenge. Summary of the Invention

[0004] In view of the above-mentioned technical problems in related technologies, the present invention proposes a switchable multi-functional NFC tag component and method based on dual antennas, which can overcome the above-mentioned shortcomings of the prior art.

[0005] To achieve the above-mentioned technical objectives, the technical solution of the present invention is implemented as follows: A switchable multi-functional NFC tag component based on dual antennas; This is a switchable multi-functional NFC tag component based on dual antennas, suitable for attaching to the back of a device with NFC functionality, comprising: The first antenna is configured such that when the component is attached to the main device, its position corresponds to the NFC transmitting area of ​​the main device, so as to perform coupled communication within the electromagnetic energy area formed by the NFC transmitting area; the second antenna is configured to be located away from the NFC transmitting area of ​​the main device, for coupled communication with an external NFC reading device. At least two NFC tag chips, each NFC tag chip storing independent interactive information; a set of selection switches connected to each of the NFC tag chips, including a first switch and a second switch; The first switch is used to selectively connect the electrical connection between the first antenna and the corresponding NFC tag chip to form a first NFC tag that can be read by the main device in the main information exchange area; the second switch is used to selectively connect the electrical connection between the second antenna and the corresponding NFC tag chip to form a second NFC tag that can be read by the external NFC reading device in the external information exchange area. The first switch and the second switch are configured such that at any given time, at most one of the NFC tag chips is allowed to be connected to the first antenna or the second antenna.

[0006] Furthermore, both the first antenna and the second antenna are induction coils with an operating frequency of 13.56MHz.

[0007] Furthermore, the first switch and the second switch are mechanical normally open switches, which are turned on in the triggered state and turned off in the non-triggered state.

[0008] Furthermore, the normally open mechanical switch is a push-button micro switch.

[0009] Furthermore, the second antenna is spatially positioned to avoid the camera area of ​​the main device.

[0010] Furthermore, each of the at least two NFC tag chips can share a connection with the first antenna through its respective first switch; and / or, each of the at least two NFC tag chips can share a connection with the second antenna through its respective second switch.

[0011] Furthermore, the component is integrally formed into a sheet-like structure and has an adhesive layer for attaching to the outer surface of the main body device.

[0012] According to another aspect of the present invention, a method is provided for using a switchable multi-functional NFC tag component based on dual antennas; The method using a switchable multi-functional NFC tag component based on dual antennas includes: The NFC tag component is installed near the NFC transmitting area of ​​a main device; When it is necessary to activate the information stored in a specific NFC tag chip for the main device to read, the first switch corresponding to the specific NFC tag chip is triggered, so that the first antenna is connected to the NFC tag chip, and a first NFC tag is formed in the main information exchange area. When it is necessary to activate the information stored in a specific NFC tag chip for external devices to read, the second switch corresponding to that specific NFC tag chip is triggered, causing the second antenna to conduct with the NFC tag chip, thus forming a second NFC tag in the external information exchange area.

[0013] The beneficial effects of this invention are as follows: By designing a first antenna and a second antenna with a specific spatial layout, and a physical switch group connecting multiple NFC tag chips and corresponding antennas, users can precisely select whether to couple information stored in a specific chip to the host device via the first antenna or to send it to an external device via the second antenna by triggering different switches. This achieves physical isolation and interference-free switching between internal and external communication modes on the same component. Furthermore, it enables the permanent and covert integration of multifunctional NFC tags into mobile devices, allowing them to remain completely "hidden" without interference when not in use, and to instantly and reliably complete information interaction in the target scenario when needed, greatly improving ease of use, integration, and scenario adaptability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an exploded view of a switchable multi-functional NFC tag component based on dual antennas according to an embodiment of the present invention; Figure 2 This is an integrated diagram of a switchable multi-functional NFC tag component based on dual antennas according to an embodiment of the present invention; Figure 3 This is a logic block diagram of a method for using a switchable multi-functional NFC tag component based on dual antennas according to an embodiment of the present invention; In the diagram: 1. First antenna; 2. Second antenna; 3. NFC tag chip; 4. First switch; 5. Second switch; 6. Electromagnetic energy area; 7. Main device; 8. NFC transmitting area; 9. Camera area; 10. Main device information exchange area; 11. External information exchange area. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0017] It should be understood that in the description of the embodiments of the present invention, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of the present invention and for simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of the present invention, "several" means two or more, unless otherwise explicitly specified.

[0018] like Figure 1-2 As shown, a switchable multi-functional NFC tag component based on dual antennas according to an embodiment of the present invention includes: The first antenna 1 is configured such that when the component is attached to the main device 7, its position corresponds to the NFC transmitting area 8 of the main device 7, so as to perform coupled communication within the electromagnetic energy area 6 formed by the NFC transmitting area 8; the second antenna 2 is configured to be located away from the NFC transmitting area 8 of the main device 7, for coupled communication with an external NFC reading device. At least two NFC tag chips 3, each NFC tag chip 3 storing independent interactive information; a set of selection switches connected to each of the NFC tag chips 3, including a first switch 4 and a second switch 5; Wherein, the first switch 4 is used to selectively connect the electrical connection between the first antenna 1 and the corresponding NFC tag chip 3, so as to form a first NFC tag that can be read by the main body device 7 in the main body information exchange area 10; the second switch 5 is used to selectively connect the electrical connection between the second antenna 2 and the corresponding NFC tag chip 3, so as to form a second NFC tag that can be read by the external NFC reading device in the external information exchange area 11. The first switch 4 and the second switch 5 are configured such that at any given time, at most one of the NFC tag chips 3 is allowed to be connected to the first antenna 1 or the second antenna 2.

[0019] Furthermore, both the first antenna 1 and the second antenna 2 are induction coils with an operating frequency of 13.56MHz.

[0020] Furthermore, the first switch 4 and the second switch 5 are mechanical normally open switches, which are turned on in the triggered state and turned off in the non-triggered state.

[0021] Furthermore, the normally open mechanical switch is a push-button micro switch.

[0022] Furthermore, the second antenna 2 is spatially positioned to avoid the camera area 9 of the main device 7.

[0023] Furthermore, each of the at least two NFC tag chips 3 can share a connection with the first antenna 1 through its respective first switch 4; and / or, each of the at least two NFC tag chips 3 can share a connection with the second antenna 2 through its respective second switch 5.

[0024] Furthermore, the component is integrally formed into a sheet-like structure and has an adhesive layer for attaching to the outer surface of the main body device 7.

[0025] Secondly, such as Figure 3 As shown, a method for using a switchable multi-functional NFC tag component based on dual antennas according to an embodiment of the present invention includes: The NFC tag component is installed near the NFC transmitting area 8 of a main device 7; When it is necessary to activate the information stored in a specific NFC tag chip 3 for the main device 7 to read, the first switch 4 corresponding to the specific NFC tag chip 3 is triggered, so that the first antenna 1 is connected to the NFC tag chip 3, and a first NFC tag is formed in the main information exchange area 10. When it is necessary to activate the information stored in a specific NFC tag chip 3 for external devices to read, the second switch 5 corresponding to the specific NFC tag chip 3 is triggered, so that the second antenna 2 is connected to the NFC tag chip 3, and a second NFC tag is formed in the external information exchange area 11.

[0026] It should be specifically noted that the NFC tag chip 3 described in this technical solution refers to a functional unit capable of independently storing specific interactive information and responding to the NFC communication protocol. This can be implemented either through a separately packaged physical chip or within a larger-scale integrated circuit, using independent storage areas and dedicated logic circuits to implement multiple such functional units. These functional units integrated within a single die, as long as the information they store is independent and can be individually addressed and accessed, should be considered as multiple NFC tag chips 3 in the sense of this invention.

[0027] Similarly, the first switch 4 and the second switch 5 in this technical solution refer to control units that can selectively turn on and off specific circuit paths according to user trigger commands. The implementation of this control unit includes, but is not limited to, discrete components such as independent mechanical microswitches, membrane buttons, and capacitive touch sensors; it also includes electronic switching devices integrated within semiconductor chips, such as MOSFET switches, analog multiplexers, and digital switch arrays controlled by logic circuits. As long as this unit plays a role in the system that is directly or indirectly controlled by the user to determine whether a certain antenna is connected to a certain NFC tag chip functional unit, it falls within the characteristic scope of the switch in this invention.

[0028] Those skilled in the art will understand that integrating the aforementioned multiple chip functional units and switch control units into a single package using semiconductor technology is a conventional and equivalent hardware implementation of the circuit architecture described in this invention, achieved with technological advancements. It does not depart from the core technical concept proposed in this invention: allocating multiple information channels to dual antennas via a selection switch. The scope of protection of this invention covers all specific and equivalent embodiments based on this core concept.

[0029] To facilitate understanding of the above technical solutions of the present invention, the following detailed description of the above technical solutions of the present invention will be provided through specific embodiments and principles.

[0030] In practical use, according to the present invention, a switchable multi-functional NFC tag assembly based on dual antennas is used as an independent accessory, which is suitable for being securely attached to the back cover of a main device 7 with NFC function, such as a smartphone, through an adhesive layer provided on its back.

[0031] The main components in this embodiment include a first antenna 1, a second antenna 2, multiple NFC tag chips 3, and corresponding first switches 4 and second switches 5.

[0032] The first antenna 1 is an induction coil with an operating frequency of 13.56MHz. When the component is correctly attached to the main device 7, the first antenna 1 is precisely configured in spatial layout to correspond to the inherent NFC transmitting area 8 on the back of the main device 7, so that the first antenna 1 can efficiently couple into the electromagnetic energy region 6 formed by the 13.56MHz electromagnetic waves continuously emitted by the NFC transmitting area 8, thereby realizing close-range, high-sensitivity coupling communication with the NFC module of the main device 7 itself.

[0033] The second antenna 2 is also an induction coil operating at a frequency of 13.56MHz. Its core design lies in spatial isolation: the second antenna 2 is positioned away from the NFC transmitting area 8. In a preferred embodiment, the layout of the second antenna 2 deliberately avoids other functional areas such as the camera area 9 on the back of the main device 7. This physical isolation ensures that the second antenna 2 is primarily used for communication with external devices such as bus gates or another mobile phone's NFC reader, and effectively prevents signal interference to the device's NFC function during operation.

[0034] The component integrates at least two NFC tag chips 3, such as chip A and chip B. Each NFC tag chip 3 pre-stores independent and different interactive information, such as deep links to applications, mobile payment credentials, or electronic business card data.

[0035] Each NFC tag chip 3 is equipped with a set of independent selection switches, including a first switch 4 and a second switch 5. In this embodiment, both the first switch 4 and the second switch 5 are mechanical normally open switches, specifically push-button micro switches. In the untriggered natural state, the internal circuit of the switch is open; when triggered by a user pressing a finger, the switch is turned on; after being released, the switch automatically resets and disconnects.

[0036] The function of the first switch 4 is to control the "internal" communication link. It is connected in series between the first antenna 1 and the corresponding NFC tag chip 3. When the user presses the first switch 4 corresponding to a certain NFC tag chip 3, the switch is turned on, electrically connecting the first antenna 1 to that specific NFC tag chip 3, thus temporarily forming a complete and standard NFC tag. Because this tag is located in the body information exchange area 10, which is tightly coupled with the mobile phone's NFC module, it can be immediately read by the body device 7 and perform corresponding operations such as one-click launch of a specified application. After releasing the first switch 4, the connection is broken, and the temporary tag disappears.

[0037] The function of the second switch 5 is to control the "external" communication link. It is connected in series between the second antenna 2 and the corresponding NFC tag chip 3. When the user presses the second switch 5 corresponding to the same or another NFC tag chip 3, the switch is turned on, electrically connecting the second antenna 2 to the NFC tag chip 3, temporarily forming a second NFC tag dedicated to external communication. Since the second antenna 2 is far from the NFC transmission area 8 of the mobile phone itself, the tag is located in the external information exchange area 11, and its activation and communication process will not trigger any response from the main device 7, thus achieving interference-free external data exchange.

[0038] The core working mode and advantages of this invention are demonstrated through the following operation process: The user first attaches the component to the back of the phone, ensuring that the first antenna 1 is aligned with the NFC transmitting area 8.

[0039] Scenario 1: Internal operation. When a user wants to quickly open an application on their phone, they simply press the first switch 4 corresponding to the NFC tag chip 3 that stores the application's launch command. The circuit is momentarily turned on, and the information is transmitted to the phone through the first antenna 1, waking up the application. After completion, releasing the switch disconnects the circuit, and the component returns to "latency".

[0040] Scenario 2: External Operation. When a user needs to pay for public transport using their mobile phone, they don't need to operate the phone screen. They simply press the second switch 5 corresponding to the NFC tag chip 3 that stores the public transport payment code. The circuit is activated, and the payment code information is sent to the gate card reader via the independent second cable 2 to complete the payment. This process is completely independent and will not accidentally trigger any applications on the phone.

[0041] Furthermore, the architecture of this invention supports optimized resource sharing: multiple NFC tag chips 3 can share a connection to the same first antenna 1 through their respective first switches 4; similarly, they can also share a connection to the same second antenna 2 through their respective second switches 5. This design achieves a high degree of integration of multiple independent functions on a single, thin component that can be molded into a sheet-like structure, greatly enhancing portability and practicality. The switching circuit can also be configured with mutual exclusion logic to ensure clear and error-free operation.

[0042] In summary, by utilizing the technical solution of this invention, and through the design of a first antenna and a second antenna with a specific spatial layout, as well as a physical switch group connecting multiple NFC tag chips and corresponding antennas, users can precisely select whether to couple information stored in a specific chip to the host device via the first antenna or to send it to an external device via the second antenna by triggering different switches. This achieves physical isolation and interference-free switching between internal and external communication modes on the same component. Furthermore, it enables the permanent and covert integration of multifunctional NFC tags into mobile devices, allowing them to remain completely "hidden" without interference when not in use, and to instantly and reliably complete information interaction in the target scenario when needed, greatly improving ease of use, integration, and scenario adaptability.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A switchable multi-functional NFC tag assembly based on dual antennas, suitable for attaching to the back of a main device (7) with NFC functionality, characterized in that, include: The first antenna (1) is configured such that when the component is attached to the main device (7), its position corresponds to the NFC transmitting area (8) of the main device (7) for coupling communication within the electromagnetic energy area (6) formed by the NFC transmitting area (8); the second antenna (2) is configured to be located away from the NFC transmitting area (8) of the main device (7) for coupling communication with an external NFC reading device. At least two NFC tag chips (3), each NFC tag chip (3) stores independent interactive information; a set of selection switches connected to each of the NFC tag chips (3) includes a first switch (4) and a second switch (5); The first switch (4) is used to selectively connect the electrical connection between the first antenna (1) and the corresponding NFC tag chip (3) to form a first NFC tag that can be read by the main body device (7) in the main body information exchange area (10); the second switch (5) is used to selectively connect the electrical connection between the second antenna (2) and the corresponding NFC tag chip (3) to form a second NFC tag that can be read by the external NFC reading device in the external information exchange area (11); The first switch (4) and the second switch (5) are configured such that at any given time, at most one of the NFC tag chips (3) is allowed to be connected to the first antenna (1) or the second antenna (2).

2. The switchable multi-functional NFC tag component based on dual antennas according to claim 1, characterized in that, The first antenna (1) and the second antenna (2) are both induction coils with an operating frequency of 13.56MHz.

3. The switchable multi-functional NFC tag component based on dual antennas according to claim 1, characterized in that, The first switch (4) and the second switch (5) are mechanical normally open switches, which are turned on in the triggered state and turned off in the non-triggered state.

4. A switchable multi-functional NFC tag component based on dual antennas according to claim 3, characterized in that, The normally open mechanical switch is a push-button micro switch.

5. A switchable multi-functional NFC tag component based on dual antennas according to claim 1, characterized in that, The second antenna (2) is spatially positioned to avoid the camera area (9) of the main device (7).

6. A switchable multi-functional NFC tag component based on dual antennas according to claim 1, characterized in that, The at least two NFC tag chips (3) can share a connection with the first antenna (1) through their respective first switches (4); and / or, the at least two NFC tag chips (3) can share a connection with the second antenna (2) through their respective second switches (5).

7. A switchable multi-functional NFC tag component based on dual antennas according to claim 1, characterized in that, The component is integrally formed into a sheet structure and has an adhesive layer so as to be attached to the outer surface of the main body device (7).

8. A method for using a switchable multi-functional NFC tag component based on dual antennas as described in any one of claims 1 to 7, characterized in that, include: The NFC tag assembly is installed near the NFC transmitting area (8) of a main device (7); When it is necessary to activate the information stored in a specific NFC tag chip (3) for the main body device (7) to read, the first switch (4) corresponding to the specific NFC tag chip (3) is triggered, so that the first antenna (1) is connected to the NFC tag chip (3) and a first NFC tag is formed in the main body information exchange area (10); When it is necessary to activate the information stored in a specific NFC tag chip (3) for external devices to read, the second switch (5) corresponding to the specific NFC tag chip (3) is triggered, so that the second antenna (2) is connected to the NFC tag chip (3) and a second NFC tag is formed in the external information exchange area (11).

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