Identification circuit, identification device and electronic equipment

Abstract

The utility model relates to an identification circuit, an identification device and electronic equipment, and the identification circuit comprises a connection unit which is used for connecting a passive magnetic coupling coil; the identification unit is connected with the passive magnetic coupling coil through the connecting unit, the passive magnetic coupling coil is used for supplying power to the identification unit, the identification unit is arranged adjacent to the passive magnetic coupling coil, and the identification unit is used for identifying the position of the passive magnetic coupling coil; wherein the working power of the identification unit is smaller than that of the passive magnetic coupling coil. In the process that the passive magnetic coupling coil gradually gets close to the active magnetic coupling coil, firstly, weak voltage is generated in the passive magnetic coupling coil, the identification unit can be driven to work so as to identify the position of the passive magnetic coupling coil of a user, and then the user is guided to align the passive magnetic coupling coil with card reading equipment or wireless charging equipment. And after the passive magnetic coupling coil and the active magnetic coupling coil are aligned, the voltage generated by the passive magnetic coupling coil can be used for normal work of the passive magnetic coupling coil.

Description

Technical Field

[0001] The present disclosure relates to the technical field of near field communication, and in particular to an identification circuit, an identification device and an electronic device. Background Art

[0002] With the development of near field communication technology, its application in terminal devices is becoming more and more extensive, such as using magnetic coupling coils for near field communication (NFC) or wireless charging. However, during use, when the terminal device is connected to a card reader or wireless charging device, it is difficult to align the magnetic coupling coils, resulting in low transmission efficiency or even failure to transmit. Utility Model Content

[0003] In order to overcome the problems existing in the related art, the present disclosure provides an identification circuit, an identification device and an electronic device.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided an identification circuit, including:

[0005] A connecting unit, used for connecting a passive magnetic coupling coil;

[0006] an identification unit, wherein the identification unit is connected to the passive magnetic coupling coil through the connecting unit, the passive magnetic coupling coil is used to power the identification unit, the identification unit is arranged adjacent to the passive magnetic coupling coil, and the identification unit is used to identify the position of the passive magnetic coupling coil;

[0007] Wherein, the operating power of the identification unit is less than the operating power of the passive magnetic coupling coil.

[0008] In some embodiments, the connection unit is arranged in series with the passive magnetic coupling coil.

[0009] In some embodiments, the connection unit includes a converter;

[0010] The identification unit is connected to the passive magnetic coupling coil via a converter.

[0011] In some embodiments, the converter comprises a balun.

[0012] In some embodiments, the identification unit includes a prompting device;

[0013] One end of the prompt device is connected to the connecting unit, and the other end of the prompt device is grounded;

[0014] The prompt device includes one or more of a light emitting device, a sound emitting device and a vibration device.

[0015] In some embodiments, the prompting devices are provided with more than two, the more than two prompting devices are arranged in a ring shape, and the more than two prompting devices are respectively arranged adjacent to the passive magnetic coupling coil.

[0016] In some embodiments, more than two of the prompting devices are connected in parallel to the connecting unit.

[0017] In some embodiments, the identification unit further comprises a switch device;

[0018] The switch device is arranged in series with the prompt device, and the switch device controls the opening and closing of the identification unit.

[0019] In some embodiments, the switch device is provided with a control end, and the control end is used to connect to a control module, and the control module controls the closing and opening of the switch device.

[0020] In some embodiments, the switching device comprises a field effect transistor.

[0021] According to a second aspect of an embodiment of the present disclosure, there is provided a marking device, including:

[0022] A mounting plate and any identification circuit as described in the first aspect above;

[0023] The identification unit is arranged on one side of the mounting plate.

[0024] In some embodiments, the mounting plate includes a first portion and a second portion;

[0025] The first part is arranged corresponding to the passive magnetic coupling coil, the second part is provided with an identification unit, and the second part is arranged in a ring shape around the first part.

[0026] In some embodiments, the identification unit includes a light-emitting device, the second portion is configured to be light-transmissive, and the light emitted by the light-emitting device passes through the second portion and is displayed outward.

[0027] In some embodiments, the second part is provided with one or more of a printed layer, an etched layer, a plated layer, and colored particles, and when the light-emitting device is turned off, the first part and the second part display the same color.

[0028] According to a third aspect of an embodiment of the present disclosure, there is provided an electronic device, including:

[0029] The identification circuit described in any one of the first aspects above, or the identification device described in any one of the second aspects above; and

[0030] Passive magnetic coupling coil, the identification unit is connected to the passive magnetic coupling coil through the connection unit.

[0031] In some embodiments, the passive magnetic coupling coil is a Near Field Communication (NFC) coil; and / or

[0032] The passive magnetic coupling coil is a wireless charging coil.

[0033] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: in the process of the passive magnetic coupling coil gradually approaching the active magnetic coupling coil, a relatively weak voltage is first generated in the passive magnetic coupling coil. Although the voltage generated at this time cannot drive the passive magnetic coupling coil to work normally, it can drive the identification unit to work to identify the position of the user's passive magnetic coupling coil, and then guide the user to align it with the card reading device or wireless charging device. After the passive magnetic coupling coil and the active magnetic coupling coil are aligned, the voltage generated by the passive magnetic coupling coil can be used to work normally.

[0034] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0036] Figure 1 is a circuit diagram of an identification circuit according to an exemplary embodiment;

[0037] Figure 2 It is a schematic diagram showing an identification device and an electronic device according to an exemplary embodiment.

[0038] Reference numerals:

[0039] 1. Identification circuit;

[0040] 11. connection unit; 12. prompting device; 13. switch device; 111. input coil; 112. output coil; 131. control terminal;

[0041] 2. Mounting plate;

[0042] 3. Electronic equipment;

[0043] 41. Passive magnetic coupling coil; 42. NFC module; 43. GPIO port. DETAILED DESCRIPTION

[0044] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0045] In the prior art, near field communication technology is increasingly widely used in terminal devices, such as using magnetic coupling coils for near field communication (NFC) or wireless charging. During use, the magnetic coupling coil located in the terminal device needs to be aligned with the magnetic coupling coil located in the card reader device or the wireless charging device before NFC communication or wireless charging can be performed. However, in daily applications, when the terminal device is connected to the card reader device or the wireless charging device, it is difficult to align the magnetic coupling coils, which results in low transmission efficiency.

[0046] The terminal device involved in the present disclosure may also be referred to as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., which is a device that provides voice and / or data connectivity to users. For example, the terminal device may be a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminal devices are: smart phones (Mobile Phone), pocket computers (Pocket Personal Computer, PPC), PDAs, personal digital assistants (Personal Digital Assistant, PDA), laptops, tablet computers, wearable devices, or vehicle-mounted devices, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device may also be a vehicle-mounted device. It should be understood that the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal device.

[0047] In order to solve the above technical problems, the present disclosure provides an identification circuit, an identification device and an electronic device.

[0048] According to a first aspect of the present disclosure, there is provided an identification circuit 1, Figure 1 is a circuit diagram of an identification circuit 1 according to an exemplary embodiment. Figure 1As shown, the identification circuit 1 includes: a connecting unit 11, used to connect the passive magnetic coupling coil 41; an identification unit, the identification unit is connected to the passive magnetic coupling coil 41 through the connecting unit 11, the passive magnetic coupling coil 41 is used to power the identification unit, the identification unit is arranged adjacent to the passive magnetic coupling coil 41, and the identification unit is used to identify the position of the passive magnetic coupling coil 41; wherein the working power of the identification unit is less than the working power of the passive magnetic coupling coil 41.

[0049] Among them, the passive magnetic coupling coil 41 is matched with the active magnetic coupling coil for signal transmission; the identification unit is arranged adjacent to the passive magnetic coupling coil 41, and is used to identify the position of the passive magnetic coupling coil 41. During use, the active magnetic coupling coil first generates a radio frequency field, and after the passive magnetic coupling coil 41 receives the electromagnetic signal of the active magnetic coupling coil, the two are connected to each other for signal transmission. The identification unit is connected to the passive magnetic coupling coil 41 through the connecting unit 11, so that the induced voltage generated when the passive magnetic coupling coil 41 is close to the active magnetic coupling coil can be used to power the identification unit, and the identification unit works to identify the passive magnetic coupling coil 41. When the passive coil approaches the radio frequency field generated by the active magnetic coupling coil, an induced voltage is generated in the passive magnetic coupling coil 41 due to electromagnetic induction. Since the working power of the identification unit is less than the working power of the passive magnetic coupling coil 41, a relatively weak voltage is first generated in the passive magnetic coupling coil 41 during the process of the passive magnetic coupling coil 41 gradually approaching the active magnetic coupling coil. Although the voltage generated at this time cannot drive the passive magnetic coupling coil 41 to work normally, it can drive the identification unit to work to identify the position of the user's passive magnetic coupling coil 41, and then guide the user to align it with the card reading device or the wireless charging device. After the passive magnetic coupling coil 41 is aligned with the active magnetic coupling coil, the voltage generated by the passive magnetic coupling coil 41 can be used to work normally.

[0050] In the embodiment of the present disclosure, the connection unit 11 is connected in series with the passive magnetic coupling coil 41 so that the current generated by the passive magnetic coupling coil can flow through the connection unit 11 to power the identification unit.

[0051] In the embodiments of the present disclosure, Figure 1 As shown, the passive magnetic coupling coil 41 is used for NFC communication, the NFC module 42, the passive magnetic coupling coil 41 and the connection unit 11 are connected in series in sequence, the passive magnetic coupling coil 41 is arranged in the terminal device, and the active magnetic coupling coil is arranged in the card reading device, and NFC communication can be performed between the card reading device and the terminal device through the active magnetic coupling coil and the passive magnetic coupling coil 41.

[0052] In some embodiments, the passive magnetic coupling coil 41 is used for wireless charging, the charging module, the passive magnetic coupling coil 41 and the connection unit 11 are connected in series in sequence, the passive magnetic coupling coil 41 is arranged in the terminal device, and the active magnetic coupling coil is arranged in the charging device. Through the active magnetic coupling coil and the passive magnetic coupling coil 41, wireless charging can be performed between the wireless charging device and the terminal device.

[0053] In some embodiments, the passive magnetic coupling coil 41 is used for NFC communication and wireless charging at the same time. The NFC module 42, the passive magnetic coupling coil 41 and the identification module are connected in series in sequence. When the passive magnetic coupling coil 41 receives the electromagnetic signal of the active magnetic coupling coil, the identification module is used to determine whether the received electromagnetic signal complies with the NFC communication protocol or the wireless charging protocol. According to the judgment result, the passive magnetic coupling coil 41 is controlled to be connected to the NFC module 42 for NFC communication, or to be connected to the charging module for wireless charging.

[0054] In some embodiments, the connection unit 11 includes a converter, and the identification unit is connected to the passive magnetic coupling coil 41 through the converter. The converter is used to process the high-frequency signal in the passive magnetic coupling coil 41 so that it can be used to power the identification unit.

[0055] In the embodiment of the present disclosure, the converter includes a balanced-unbalanced converter, and the identification unit is connected to the passive magnetic coupling coil 41 via the balanced-unbalanced converter.

[0056] like Figure 1 As shown, the balun includes an input coil 111 and an output coil 112. The input coil 111 and the output coil 112 are coupled to each other to realize signal conversion, and the high-frequency current in the passive magnetic coupling coil 41 is converted into a current that can power the identification unit.

[0057] In some embodiments, the input coil 111 is connected in series with the passive magnetic coupling coil 41, one end of the output coil 112 is connected to the identification unit for powering the identification unit, and the other end of the output coil 112 is grounded. Thus, when the passive magnetic coupling coil 41 receives a high-frequency electromagnetic signal in the radio frequency field close to the active magnetic coupling coil, a high-frequency current is generated in the passive magnetic coupling coil 41, and when the generated high-frequency current flows through the input coil 111, it is converted by the output coil 112 into a current that can power the identification unit.

[0058] In the embodiment of the present disclosure, the identification unit includes a prompting device 12; one end of the prompting device 12 is connected to the connecting unit 11, and the other end of the prompting device 12 is grounded. The prompting device 12 includes one or more of a light-emitting device, a sound-emitting device, and a vibration device. The position of the passive magnetic coupling coil 41 is identified by the prompting device 12.

[0059] In some embodiments, one end of the prompt device 12 is connected to one end of the output coil 112 , and the other end of the prompt device 12 is grounded.

[0060] In some embodiments, more than two prompting devices 12 are provided. By providing more than two prompting devices 12, the position mark is made more obvious.

[0061] In some embodiments, more than two prompting devices 12 are arranged in a ring shape, and the more than two prompting devices 12 are respectively disposed adjacent to the passive magnetic coupling coil 41 , so as to further enhance the conspicuity of the position identification.

[0062] In some embodiments, more than two prompting devices 12 are arranged along the outer circumference of the passive magnetic coupling coil 41 .

[0063] In some embodiments, Figure 2 As shown, four prompting devices 12 are provided, and the four prompting devices 12 are arranged in a rectangular shape and are respectively located at the outer edges of the passive magnetic coupling coil 41 .

[0064] In some embodiments, the prompting device 12 comprises a light emitting device.

[0065] In some embodiments, the prompting device 12 includes an LED light emitting diode.

[0066] In the embodiment of the present disclosure, more than two prompting devices 12 are connected in parallel to the connecting unit 11 , that is, one end of the more than two prompting devices 12 is connected to the same end of the output coil 112 , and the other end is grounded.

[0067] In some embodiments, two or more prompting devices 12 are connected to one end of the output coil 112 through a flexible printed circuit (FPC). Since the operating current required by the prompting device 12 is relatively small, the current transmission to the prompting device 12 can be achieved through the FPC with thinner wiring.

[0068] In some embodiments, the FPC is in a ring structure, matching the passive magnetic coupling coil 41, and more than two prompting devices 12 are disposed on the FPC so that the more than two prompting devices 12 are arranged in a ring shape, thereby facilitating assembly.

[0069] In an embodiment of the present disclosure, the identification unit also includes a switching device 13, which is used to disconnect or connect the prompt device 12. When the prompt device 12 is connected, the passive magnetic coupling coil 41 can power the prompt device 12 when receiving an electromagnetic signal, so that it can work to perform position identification; when the prompt device 12 is disconnected, the passive magnetic coupling coil 41 cannot power the prompt device 12 when receiving an electromagnetic signal, and the prompt device 12 cannot work.

[0070] That is to say, when the passive magnetic coupling coil 41 does not transmit signals with the active magnetic coupling coil, the switch device 13 controls the prompt device 12 to be connected, waiting to be powered by the passive magnetic coupling coil 41 to mark the work; when the passive magnetic coupling coil 41 is aligned with the active magnetic coupling coil, signal transmission is carried out between the passive magnetic coupling coil 41 and the active magnetic coupling coil. At this time, the switch device 13 controls the prompt device 12 to be disconnected, and the prompt device 12 stops working and no longer marks.

[0071] In some embodiments, the switch device 13 and the prompt device 12 are arranged in series, and the overall structure is relatively simple, which effectively reduces the production cost.

[0072] In some embodiments, one end of the prompt device 12 is connected in series with the switch device 13 and then grounded.

[0073] like Figure 1 As shown, to match more than two prompting devices 12, more than two switch devices 13 are provided, and the prompting devices 12 and the switch devices 13 are arranged in a one-to-one correspondence.

[0074] In the embodiment of the present disclosure, the switch device 13 is provided with a control terminal 131 , and the control terminal 131 is used to connect with the control module to control the switch device 13 to be closed or opened, thereby controlling the connection and disconnection of the prompt device 12 .

[0075] In some embodiments, a terminal device adapted to the embodiments of the present disclosure is connected to the control terminal 131 of the switch device 13 through a general purpose input and output port (GPIO) of its processor to control the connection and disconnection of the switch device 13.

[0076] In some embodiments, the switch device 13 includes a field effect transistor, and the field effect transistor can be controlled to be connected or disconnected by applying a voltage to the field effect transistor.

[0077] In some embodiments, the field effect transistor includes an enhancement mode N-channel insulated gate field effect transistor (N-MOSFET).

[0078] In some embodiments, one end of the prompt device 12 is connected to one end of the output coil 112, the other end of the prompt device 12 is connected to the drain of the enhancement type N-MOSFET, the source of the enhancement type N-MOSFET is grounded, and the gate of the enhancement type N-MOSFET is connected to the GPIO port 43 of the processor. When there is no voltage on the gate of the enhancement type N-MOSFET, the drain and source are not connected, that is, the prompt device 12 is disconnected, and when a voltage is applied to the gate of the enhancement type N-MOSFET, the drain and source are connected, that is, the prompt device 12 is connected.

[0079] In another embodiment of the present disclosure, the prompt device 12 includes a display screen, and the connecting unit 11 is used to determine whether the voltage in the passive magnetic coupling coil 41 reaches its working voltage.

[0080] For example, a terminal device matching the present disclosure is provided with a display screen and a passive magnetic coupling coil 41 on opposite sides, respectively. When the side of the terminal device provided with the passive magnetic coupling coil 41 approaches the card reading device or the wireless charging device, the position of the passive magnetic coupling coil 41 is marked through the display screen located on the other side of the terminal device. In other words, when the passive magnetic coupling coil 41 is close to the active magnetic coupling coil, the processor of the terminal device determines the current generated in the passive magnetic coupling coil 41 through the connection unit 11, and then controls the display screen to display the position of the passive magnetic coupling coil 41, wherein the position of the passive magnetic coupling coil 41 displayed on the display screen is the vertical projection of the passive magnetic coupling coil 41 on the display screen, which can be displayed on the display screen through the user interface (UI) design, thereby marking the position of the passive magnetic coupling coil 41.

[0081] Based on the same concept, according to a second aspect of the embodiment of the present disclosure, a marking device is provided, such as Figure 2 As shown, the prompt device includes a mounting plate 2 and an identification circuit 1 as described in any one of the first aspects above.

[0082] Among them, the mounting plate 2 can be a back shell, a middle frame, or other accessories (protective shell, keyboard protective shell, radiator, bracket, external camera, etc.).

[0083] The mounting plate 2 is used to be mounted on the adapted terminal device and is located on the same side as the passive magnetic coupling coil 41 of the terminal device. The mounting plate 2 covers the passive magnetic coupling coil 41 .

[0084] In some embodiments, the mounting plate 2 includes a first portion and a second portion, the first portion is disposed corresponding to the passive magnetic coupling coil 41 , the second portion is provided with an identification unit, and the second portion is annularly disposed around the first portion.

[0085] In some embodiments, the identification unit includes a light-emitting device, the second portion is configured to be light-transmissive, and the light emitted by the light-emitting device passes through the second portion to be displayed outwardly.

[0086] In some embodiments, the second part is provided with one or more of a printed layer, an etched layer, a plated layer, and colored particles, and when the light-emitting device is turned off, the first part and the second part display the same color. That is, when the light-emitting device emits light, the second part displays the light outward, thereby guiding the user to align the passive magnetic coupling coil 41 with the active magnetic coupling coil of the card reader device, or the active magnetic coupling coil of the wireless charging device; when the light-emitting device is turned off, the second part and the first part display the same color, so that the color or rendering pattern of the mounting plate 2 is displayed completely, and the visual effect is improved.

[0087] In some embodiments, there are more than two second parts, which match more than two prompting devices 12 , and the second parts and the prompting devices 12 are arranged in a one-to-one correspondence.

[0088] In another embodiment of the present disclosure, the mounting plate 2 and the passive magnetic coupling coil 41 are respectively located on opposite sides of the adapted terminal device, that is, when the side of the terminal device provided with the passive magnetic coupling coil 41 is approached toward the card reading device or the wireless charging device, the position of the passive magnetic coupling coil 41 is identified by the identification circuit 1 located on the other side of the terminal device, wherein the identification unit of the identification circuit 1 located on one side of the terminal device matches the projection position of the passive magnetic coupling coil 41 on that side of the terminal device, so that the identification unit plays a role in identifying the position of the passive magnetic coupling coil 41.

[0089] For example, in a terminal device adapted to the present disclosure, the passive magnetic coupling coil 41 and the display screen of the terminal device are respectively located on opposite sides of the terminal device. In another disclosed embodiment, the mounting plate 2 is made of a transparent material, the mounting plate 2 covers the display screen, or is integrated with the display screen, and the identification unit is embedded in the mounting plate 2.

[0090] That is to say, when the prompt device 12 of the identification unit is turned off, the transparent mounting plate 2 does not affect the normal use of the display screen. When the prompt device 12 of the identification unit is lit and the position of the passive magnetic coupling coil 41 located on the other side is marked, the user can directly determine the position of the passive magnetic coupling coil 41 through the identification unit on the same side as the display screen, which makes the operation more convenient.

[0091] Based on the same concept, according to a third aspect of the basic disclosed embodiment, an electronic device 3 is also provided, comprising: an identification circuit 1 as described in any one of the first aspects above.

[0092] In some embodiments, the electronic device 3 of the embodiment of the present disclosure includes any identification device described in the second aspect above.

[0093] In the embodiment of the present disclosure, the electronic device 3 includes a passive magnetic coupling coil 41, and the identification unit is connected to the passive magnetic coupling coil 41 through the connection unit 11.

[0094] In some embodiments, the passive magnetic coupling coil 41 may be a near field communication (NFC) coil.

[0095] In some embodiments, the passive magnetic coupling coil 41 may be a wireless charging coil.

[0096] Among them, the electronic device 3 can be a mobile phone, a computer, a digital broadcast electronic device, a message sending and receiving device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, a translation machine, a watch, a bracelet and other wearable devices, etc.

[0097] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0098] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0099] It will be further understood that the terms “center”, “longitudinal”, “lateral”, “front”, “back”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0100] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

[0101] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0102] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0103] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A marking circuit, characterized in that: include: A connecting unit, used for connecting a passive magnetic coupling coil; an identification unit, wherein the identification unit is connected to the passive magnetic coupling coil through the connecting unit, the passive magnetic coupling coil is used to power the identification unit, the identification unit is arranged adjacent to the passive magnetic coupling coil, and the identification unit is used to identify the position of the passive magnetic coupling coil; Wherein, the operating power of the identification unit is less than the operating power of the passive magnetic coupling coil.

2. The identification circuit according to claim 1, characterized in that: The connection unit is arranged in series with the passive magnetic coupling coil.

3. The identification circuit according to claim 2, characterized in that: The connection unit includes a converter; The identification unit is connected to the passive magnetic coupling coil via a converter.

4. The identification circuit according to claim 3, characterized in that: The converter comprises a balun.

5. The identification circuit according to any one of claims 1 to 4, characterized in that: The identification unit includes a prompting device; One end of the prompt device is connected to the connecting unit, and the other end of the prompt device is grounded; The prompt device includes one or more of a light emitting device, a sound emitting device and a vibration device.

6. The identification circuit according to claim 5, characterized in that: The prompting devices are provided with more than two, and the more than two prompting devices are arranged in a ring shape, and the more than two prompting devices are respectively arranged adjacent to the passive magnetic coupling coil.

7. The identification circuit according to claim 6, characterized in that: More than two of the prompting devices are connected in parallel to the connecting unit.

8. The identification circuit according to claim 5, characterized in that: The identification unit also includes a switch device; The switch device is arranged in series with the prompt device, and the switch device controls the opening and closing of the identification unit.

9. The identification circuit according to claim 8, characterized in that: The switch device is provided with a control end, and the control end is used to connect with a control module, and the control module controls the switch device to close and open.

10. The identification circuit according to claim 9, characterized in that: The switching device comprises a field effect transistor.

11. A marking device, characterized in that: include: A mounting plate and a marking circuit according to any one of claims 1 to 10; The identification unit is arranged on one side of the mounting plate.

12. The marking device according to claim 11, characterized in that: The mounting plate includes a first portion and a second portion; The first part is arranged corresponding to the passive magnetic coupling coil, the second part is provided with an identification unit, and the second part is arranged in a ring shape around the first part.

13. The marking device according to claim 12, characterized in that: The identification unit comprises a light emitting device, the second part is configured to be light-transmissive, and the light emitted by the light emitting device passes through the second part and is displayed outwardly.

14. The marking device according to claim 13, characterized in that: The second part is provided with one or more of a printed layer, an etched layer, a plated layer, and colored particles. When the light-emitting device is turned off, the first part and the second part display the same color.

15. An electronic device, characterized in that: include: The identification circuit according to any one of claims 1 to 10, or the identification device according to any one of claims 11 to 14; as well as Passive magnetic coupling coil, the identification unit is connected to the passive magnetic coupling coil through the connection unit.

16. The electronic device according to claim 15, characterized in that: The passive magnetic coupling coil is a Near Field Communication (NFC) coil; and / or The passive magnetic coupling coil is a wireless charging coil.

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