Electronic device

Abstract

The invention discloses electronic equipment, and belongs to the technical field of communication. The electronic device comprises a circuit board, a support, an NFC radio frequency circuit and a first coil. The circuit board and the support are arranged in a stacked mode, the NFC radio frequency circuit is arranged on the circuit board, and the NFC radio frequency circuit is electrically connected with the first coil; the first coil comprises a first segment and a second segment, the first segment is arranged in the circuit board, and the second segment is arranged on the support; the first subsection comprises a first sub-subsection positioned on a first side edge of the first coil and a second sub-subsection positioned on a second side edge of the first coil; the second section comprises a third sub-section positioned on a third side edge of the first coil and a fourth sub-section positioned on a fourth side edge of the first coil; the first side edge and the second side edge are a pair of opposite side edges of the first coil, and the third side edge and the fourth side edge are the other pair of opposite side edges of the first coil.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and particularly relates to an electronic device. Background Art

[0002] Near Field Communication (NFC), as a near-field communication technology, has currently been widely applied to electronic devices such as mobile phones. The NFC function on the electronic device makes the daily use of users more convenient, and the NFC function of the electronic device can be used as a bus card, access control card, meal card, etc.

[0003] NFC is used for communication between a master device and a slave device. Among them, the NFC antenna of the master device drives an active coil through its own power supply to generate a magnetic field. A passive coil placed in this magnetic field is excited to generate an induced current, and the induced current drives the NFC antenna of the slave device to work. Thus, the master device can perform NFC communication with the slave device.

[0004] However, as Figure 1 shown, in this coil induction method, when the active coil 102 of the master device 101 is working, if the projection of the passive coil 104 of the slave device 103 on the plane where the active coil 102 is located is misaligned with the active coil 102, since the magnetic field vector generated by the active coil 102 is reversed inside and outside the coil, the magnetic field in the passive coil 104 of the slave device at this time is the superposition of the magnetic fields of these two directions, making the magnetic field in the passive coil 104 smaller, and the induced voltage of the passive coil 104 also becomes smaller. When this change is less than a certain threshold, the slave device 103 cannot be driven, and at this time, NFC communication cannot be achieved. Therefore, during actual operation, generally, an NFC communication blind area 201 as Figure 2 shown will be generated around the active coil.

[0005] It can be seen that the range of the NFC communication blind area near the active coil in the related art is too large. Summary of the Invention

[0006] The purpose of the embodiments of this application is to provide an electronic device, which can solve the problem of too large a range of the NFC communication blind area near the active coil.

[0007] In a first aspect, the embodiments of this application provide an electronic device, which includes: a circuit board, a bracket, an NFC radio frequency circuit, and a first coil;

[0008] The circuit board and the bracket are stacked, the NFC radio frequency circuit is arranged on the circuit board, and the NFC radio frequency circuit is electrically connected to the first coil;

[0009] The first coil includes a first segment and a second segment. The first segment is disposed within the circuit board, and the second segment is disposed on the bracket;

[0010] The first segment includes a first sub-segment located on a first side of the first coil and a second sub-segment located on a second side of the first coil;

[0011] The second segment includes a third sub-segment located on a third side of the first coil and a fourth sub-segment located on a fourth side of the first coil;

[0012] The first side and the second side are a pair of opposite sides of the first coil, and the third side and the fourth side are another pair of opposite sides of the first coil.

[0013] In an embodiment of the present application, the electronic device includes: a circuit board, a bracket, an NFC radio frequency circuit, and a first coil; the circuit board and the bracket are stacked, the NFC radio frequency circuit is disposed on the circuit board, and the NFC radio frequency circuit is electrically connected to the first coil; the first coil includes a first segment and a second segment, the first segment is disposed within the circuit board, and the second segment is disposed on the bracket; the first segment includes a first sub-segment located on a first side of the first coil and a second sub-segment located on a second side of the first coil; the second segment includes a third sub-segment located on a third side of the first coil and a fourth sub-segment located on a fourth side of the first coil; the first side and the second side are a pair of opposite sides of the first coil, and the third side and the fourth side are another pair of opposite sides of the first coil. By disposing the first segment located on the opposite sides of the first coil within the circuit board and only retaining the second segment located on the other opposite sides of the first coil on the bracket, in this way, the radiation on the first segment is weakened by the influence of the wiring on the circuit board and the coverage of the bracket, so that the first segment is only used for current relay on the first coil, and the outward radiation is realized by the second segment, making the radiation blind area of the first coil shrink to both sides of the second segment, achieving the reduction of the NFC radiation blind area of the first coil. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the misalignment of a passive coil and an active coil in the related art;

[0015] Figure 2 is a schematic diagram of the NFC communication blind area of an active coil in the related art;

[0016] Figure 3 is a schematic diagram of the NFC communication principle;

[0017] Figure 4It is one of the schematic structural diagrams of an electronic device in some embodiments of the present application;

[0018] Figure 5 It is a sectional view along the Figure 4 X-X direction in

[0019] Figure 6 It is Figure 4 a schematic diagram of the current, magnetic field, and NFC blind area on the first coil in the electronic device shown;

[0020] Figure 7 It is another schematic structural diagram of an electronic device in some embodiments of the present application;

[0021] Figure 8 It is Figure 7 a schematic diagram of the current, magnetic field, and blind area on the first coil in the electronic device shown;

[0022] Figure 9 It is the third schematic structural diagram of an electronic device in some embodiments of the present application;

[0023] Figure 10 It is Figure 9 a schematic diagram of the NFC blind area when the electronic device shown is in the first working state;

[0024] Figure 11 It is Figure 9 a schematic diagram of the NFC blind area when the electronic device shown is in the second working state;

[0025] Figure 12 It is Figure 9 a schematic diagram of the NFC detection and communication flow chart of the electronic device shown;

[0026] Figure 13 It is a schematic diagram of the relative positions of the first coil, conductive strip, and switching module in some embodiments of the present application;

[0027] Figure 14 It is Figure 13 a schematic diagram of the NFC blind area when the electronic device shown is in the third working state;

[0028] Figure 15 It is Figure 13 a schematic diagram of the NFC blind area when the electronic device shown is in the fourth working state;

[0029] Figure 16 It is Figure 13 a schematic diagram of the NFC blind area when the electronic device shown is in the fifth working state;

[0030] Figure 17 It is Figure 13 a schematic diagram of the NFC detection and communication flow chart of the electronic device shown. Detailed implementation manners

[0031] The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0032] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order different from those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the associated objects before and after are in an "or" relationship.

[0033] As Figure 3 shown, NFC is used for communication between the master device 101 and the slave device 103. Among them, the NFC antenna of the master device 101 drives the active coil 102 through its own power supply to generate a magnetic field. The passive coil 104 placed in this magnetic field is excited to generate an induced current, and the induced current drives the NFC antenna of the slave device 103 to work. Thus, the master device 101 can perform NFC communication with the slave device 103.

[0034] The electronic device in the embodiment of the present application can be used as a master device, and drives the first coil to generate a magnetic field through the NFC radio frequency circuit, so as to drive the slave device outside the electronic device based on the electromagnetic induction of the magnetic field, so that the NFC antenna including the first coil on the electronic device in the embodiment of the present application can detect the slave device outside the electronic device and perform NFC communication with it.

[0035] The electronic device provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0036] Refer to Figure 4 and Figure 5 The electronic device provided in the embodiment of the present application includes: a circuit board 1, a bracket 2, an NFC radio frequency circuit 3, and a first coil 4;

[0037] The circuit board 1 and the bracket 2 are stacked, the NFC radio frequency circuit 3 is arranged on the circuit board 1, and the NFC radio frequency circuit 3 is electrically connected to the first coil 4;

[0038] The first coil 4 includes a first segment 41 and a second segment 42. The first segment 41 is disposed within the circuit board 1, and the second segment 42 is disposed on the bracket 2.

[0039] The first segment 41 includes a first sub-segment 411 located on the first side of the first coil 4 and a second sub-segment 412 located on the second side of the first coil 4.

[0040] The second segment 42 includes a third sub-segment 421 located on the third side of the first coil 4 and a fourth sub-segment 422 located on the fourth side of the first coil 4.

[0041] The first side and the second side are a pair of opposite sides of the first coil 4, and the third side and the fourth side are another pair of opposite sides of the first coil 4.

[0042] It should be noted that the NFC radio frequency circuit 3 has the same working principle as the NFC radio frequency circuit in the related art. Both are used to feed power to the NFC coil to excite the NFC coil to radiate and demodulate the signal received through the NFC coil, so as to achieve NFC communication. Among them, the first coil 4 can be an NFC coil or a part of the NFC coil.

[0043] In some embodiments, the electronic device in the embodiments of the present application can be a terminal or other devices other than the terminal. Exemplarily, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a handheld computer, an in-vehicle electronic device, a Mobile Internet Device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc. It can also be a server, a Network Attached Storage (NAS), a personal computer (PC), a television (TV), a teller machine, or a self-service machine, etc. The embodiments of the present application do not make specific limitations.

[0044] In some embodiments, the circuit board 1 can be a circuit board within the electronic device that is at least partially located within the projection area of the NFC coil, such as a main board, a secondary board, etc. Specifically, it can be selected according to the position of the NFC coil, and no specific limitation is made here.

[0045] In some embodiments, the bracket 2 can be a main board bracket, a heat dissipation bracket, a camera bracket, etc. inside the electronic device, and can be specifically selected according to the layout and layout position of the brackets inside the electronic device, without specific limitation here.

[0046] In some embodiments, when the bracket 2 is made of a material with a relatively high dielectric constant, such as metal, the second segment 42 can be arranged on the surface of the bracket 2 facing the outside of the electronic device.

[0047] In other embodiments, when the bracket 2 is made of a material with a relatively low dielectric constant, such as plastic, the second segment 42 can be arranged on the surface of the bracket 2 facing the circuit board 1, or can be arranged inside the bracket 2.

[0048] For the sake of convenience of description, as Figure 4 shown, in the embodiments of the present application, taking the electronic device as a mobile phone and the NFC coil is arranged in the upper half of the mobile phone along the length direction as an example for illustration. At this time, the upper half of the mobile phone is also provided with a camera 10. At this time, the circuit board 1 can be the main board of the mobile phone, the bracket 2 can be a camera bracket, and the second segment 42 is arranged on the surface of the bracket 2 facing away from the circuit board 1.

[0049] It is worth noting that the first segment 41 is arranged inside the circuit board 1. In this way, due to the shielding effect of at least one of the wiring layer inside the circuit board 1 and the bracket 2, the first segment 41 cannot radiate signals to the outside of the electronic device, or weakens the radiation signals of the first segment 41 to the outside of the electronic device. In contrast to the first segment 41, the second segment 42 is arranged on the side of the bracket 2 facing away from the circuit board 1, so as to be able to radiate signals to the outside of the electronic device.

[0050] At this time, the detection of the slave device is mainly realized based on the magnetic field of the second segment 42, and the second segment 42 includes the segments where the opposite sides of the first coil 4 are located. For example, Figure 6 the segments where the upper side B and the lower side D of the first coil 4 in are the second segment. At this time, when the passive coil of the slave device approaches the first coil 4 from the left and right sides respectively, the magnetic field in the passive coil gradually increases until it can drive the NFC antenna of the slave device to work, and then the detection and NFC communication of the slave device can be realized. During this process, even when the projection of the passive coil on the plane where the first coil 4 is located is misaligned with the first coil 4, since the reverse magnetic fields generated by the left side A and the right side C of the first coil 4 cannot enter the passive coil, the change of the magnetic field in the passive coil follows the rule: the larger the overlapping area of the projection of the passive coil on the plane where the first coil 4 is located and the first coil 4, the larger the magnetic field in the passive coil. In this way, there is no NFC blind area on the left and right sides of the first coil 4.

[0051] Of course, as Figure 6As shown, since the magnetic field directions in the regions above the upper side B and below the lower side D of the first coil 4 are opposite to the magnetic field direction inside the first coil 4, there is a problem of NFC detection failure when the passive coil of the device approaches the first coil 4 from the upper and lower sides respectively. That is, when the passive coil moves to a position where the magnetic fields in two opposite directions cancel each other out, making the induced current of the passive coil unable to drive the slave device, there is a small range of NFC blind spots above the upper side B and below the lower side D.

[0052] In the embodiments of the present application, the NFC blind spots near the first segment 41 are eliminated, and there are only NFC blind spots near the second segment 42, which can reduce the NFC blind spots of the first coil 4.

[0053] In some embodiments, the first segment 41 can be implemented by PCB traces in the circuit board 1. The second segment 42 can be implemented by FPCs on the bracket 2.

[0054] Of course, the above-mentioned first segment 41 and second segment 42 can also be coils, multiplexed middle frame structures, etc., which are not specifically limited herein.

[0055] It should be noted that the first coil 4 in the embodiments of the present application can be a circular ring structure, a rectangular ring structure, an oval ring structure, etc. At this time, the second segment 42 can be located at any position of the first coil 4 and at least includes two opposite parts of the first coil 4 along a certain direction, and the first segment 41 includes two opposite parts of the first coil 4 in the other direction.

[0056] For the convenience of description, in the embodiments of the present application, it is usually exemplified that the first coil 4 is a rectangular ring structure, and the second segment 42 is located on the opposite side edges of the rectangular ring structure, and the remaining opposite side edges are provided with the first segment 41. The shape of the first coil 4, and the positions of the first segment 41 and the second segment 42 on the first coil 4 are not specifically limited herein.

[0057] In some embodiments, as Figure 4 and Figure 6 shown, the first side is the left side A of the first coil 4, the second side is the right side C of the first coil 4, the third side is the upper side B of the first coil 4, and the fourth side is the lower side D of the first coil 4.

[0058] In this embodiment, the segments on the left and right sides of the first coil 4 can be arranged on the circuit board 1, so as to eliminate the NFC blind spots on the left and right sides of the first coil 4.

[0059] It is worth noting that in the related art, taking a mobile phone as an example of an electronic device, main antennas such as cellular antennas and WiFi antennas are usually arranged on the frame of the mobile phone. In this embodiment, by arranging the segments of the first coil 4 close to the left and right sides of the mobile phone on the circuit board 1, the interference of the first coil 4 on the main antennas on the left and right sides of the mobile phone can be reduced, the antenna efficiency of the main antenna of the electronic device can be improved, and the communication performance of the electronic device can be enhanced.

[0060] For another example: as Figure 7 and Figure 8 shown, the first side is the upper side B of the first coil 4, the second side is the lower side D of the first coil 4, the third side is the left side A of the first coil 4, and the fourth side is the right side C of the first coil 4.

[0061] In this embodiment, the segments of the upper and lower sides of the first coil 4 can be arranged on the circuit board 1, so as to eliminate the NFC blind areas on the upper and lower sides of the first coil 4.

[0062] It is worth noting that in the related art, taking a mobile phone as an example of an electronic device, with the change of the appearance design of the mobile phone, the number of mobile phones equipped with large metal decorative parts has increased significantly. These decorative rings basically occupy the entire upper half area of the back of the mobile phone, and the decorative rings are very close to the frame of the mobile phone; and there are complex modules such as cameras, infrared, and flashlights under the decorative parts, and the layout space of the NFC antenna is severely compressed. In this embodiment, by arranging the segments of the upper and lower sides of the first coil 4 on the circuit board 1, the upper and lower sides of the first coil 4, especially the lower side, do not have to penetrate the gaps between the modules such as cameras, infrared, and flashlights on the bracket 2, so that a more flexible NFC coil layout can be realized, and the layout flexibility of the modules such as cameras, infrared, and flashlights can be improved.

[0063] In practical applications, it can be determined whether to adopt the NFC coil scheme as Figure 4 shown or the NFC coil scheme as Figure 7 shown according to the layout position, antenna efficiency and communication requirements of the main antenna on the electronic device, and the layout position of the modules such as cameras, infrared, and flashlights on the bracket 2, etc. For example: when the electronic device has high communication requirements and the bracket 2 has enough space to set the NFC coil segments, the NFC coil scheme as Figure 4 shown can be adopted. For another example: when the interference of the NFC coil on the main antenna on the electronic device can still meet the communication requirements, the NFC coil scheme as Figure 7 shown can be adopted to improve the layout flexibility of the modules such as cameras, infrared, and flashlights on the bracket 2.

[0064] As an optional embodiment, as Figure 9As shown in the figure, the electronic device according to the embodiment of the present application further includes: a second coil 6 and a switching switch 7;

[0065] The switching switch 7 is electrically connected to the NFC radio frequency circuit 3, the first coil 4 and the second coil 6 respectively, and the switching switch 7 is used to conduct one of the first coil 4 and the second coil 6 with the NFC radio frequency circuit 3;

[0066] The second coil 6 includes a third segment 61 and a fourth segment 62. The third segment 61 is disposed on the side of the bracket 2 facing away from the circuit board 1, and the fourth segment 62 is disposed within the circuit board 1;

[0067] The third segment 61 extends in the same direction as the first segment 41, and the fourth segment 62 extends in the same direction as the second segment 42.

[0068] During operation, the electronic device includes a first working state and a second working state:

[0069] In the first working state, the switching switch 7 electrically connects the NFC radio frequency circuit 3 to the first coil 4, and disconnects the NFC radio frequency circuit 3 from the second coil 6;

[0070] In the second working state, the switching switch 7 electrically connects the NFC radio frequency circuit 3 to the second coil 6, and disconnects the NFC radio frequency circuit 3 from the first coil 4.

[0071] In some embodiments, the switching switch 7 is electrically connected to the NFC radio frequency circuit 3, the first coil 4 and the second coil 6 respectively, which may be: the NFC radio frequency circuit 3 is electrically connected to the first end of the switching switch 7, the second end of the switching switch 7 is electrically connected to the first coil 4, and the third end of the switching switch 7 is electrically connected to the second coil 6.

[0072] In this way, when the first end and the second end of the switching switch 7 are conducted, the NFC radio frequency circuit 3 and the first coil 4 are conducted, and when the first end and the third end of the switching switch 7 are conducted, the NFC radio frequency circuit 3 and the second coil 6 are conducted.

[0073] For example: the switching switch 7 may be a single-pole double-throw switch, and the single-pole double-throw switch includes a fixed end and two switching ends. At this time, the first end of the switching switch 7 may be the fixed end of the single-pole double-throw switch, and the second end and the third end of the switching switch 7 are the two switching ends of the single-pole double-throw switch.

[0074] Of course, the switching switch 7 can also be of other structures. For example, the switching switch 7 includes two single-pole single-throw switches. At this time, one single-pole single-throw switch is connected between the NFC radio frequency circuit 3 and the first coil 4 for conducting or disconnecting the electrical connection between the NFC radio frequency circuit 3 and the first coil 4; the other single-pole single-throw switch is connected between the NFC radio frequency circuit 3 and the second coil 6 for conducting or disconnecting the electrical connection between the NFC radio frequency circuit 3 and the second coil 6.

[0075] In some embodiments, as Figure 10 and Figure 11 shown, the position on the second coil 6 corresponding to the first segment 41 of the first coil 4 is set as the third segment 61, and the position on the second coil 6 corresponding to the second segment 42 of the first coil 4 is set as the fourth segment 62. Moreover, the third segment 61 is disposed on the bracket 2, and the fourth segment 62 is disposed within the circuit board 1. In this way, when the second coil 6 operates, the external radiation of the third segment 61 is not affected by the circuit board 1 and the bracket 2, while the external radiation of the fourth segment 62 is weakened by the circuit board 1 and the bracket 2. At this time, based on the same principle that the NFC blind area near the first segment 41 is eliminated, the NFC blind area near the fourth segment 62 is eliminated. Since the fourth segment 62 extends in the same direction as the second segment 42, it is equivalent to eliminating the NFC blind area near the second segment 42.

[0076] In some embodiments, the switching switch 7 can adopt a time-sharing method to conduct the NFC radio frequency circuit 3 with the first coil 4 or the second coil 6. In this way, as Figure 10 shown, when the first coil 4 is conducted with the NFC radio frequency circuit 3 and operates, the NFC blind area near the first segment 41 is eliminated; as Figure 11 shown, when the second coil 6 is conducted with the NFC radio frequency circuit 3 and operates, the NFC blind area near the second segment 42 is eliminated.

[0077] In some embodiments, the electronic device in this embodiment can implement slave device detection according to the NFC detection and communication process as Figure 12 shown. As Figure 12 shown, the NFC detection and communication process includes the following steps:

[0078] Step 1a: Conduct the first coil 4 with the NFC radio frequency circuit 3.

[0079] Through step 1a, the first coil 4 can be used to detect the slave device near the electronic device.

[0080] Step 2a: Determine whether a slave device is detected.

[0081] In this step, if the judgment result is "yes", step 3a is executed; if the judgment result is "no", step 5a is executed.

[0082] In some implementations, when no slave device near the electronic device is detected using the first coil 4 , there may be two situations: one is that there is no slave device near the electronic device; the other is that the slave device is located in the NFC blind area of the electronic device.

[0083] Step 3a: Use the first coil 4 to perform a card reading / swiping operation.

[0084] In this step, the electronic device uses the NFC antenna including the first coil 4 to perform NFC communication with the slave device to realize the card reading / swiping function.

[0085] Step 4a: NFC communication completed.

[0086] Step 5a: Connect the second coil 6 to the NFC radio frequency circuit 3.

[0087] Through step 5a, the second coil 6 can be used to detect the slave device near the electronic device.

[0088] Step 6a: Determine whether a slave device is detected.

[0089] In this step, if the judgment result is "yes", execute step 7a; if the judgment result is "no", jump to step 1a and repeat steps 1a to 6a.

[0090] In some embodiments, a projection of the second coil 6 on the circuit board 1 at least partially overlaps with a projection of the first coil 4 on the circuit board 1 .

[0091] For example: the center position of the second coil 6 overlaps with the center position of the first coil 4. At this time, the shape and size of the second coil 6 and the first coil 4 are consistent or close, and the second coil 6 and the first coil 4 can be staggered in a direction perpendicular to the plane where the first coil 4 is located. For example: the circuit board 1 and the bracket 2 are stacked, wherein the first segment 41 of the first coil 4 is arranged in the circuit board 1, and the second segment 42 is arranged on the side of the bracket 2 facing away from the circuit board 1. At this time, the third segment 61 of the second coil 6 that is opposite to the first segment 41 can be arranged on the side of the bracket 2 facing away from the circuit board 1, and is staggered with the first segment 41 in a direction perpendicular to the plane where the first coil 4 is located; in addition, the fourth segment 62 of the second coil 6 that is opposite to the second segment 42 can be arranged in the circuit board 1, and is also staggered with the second segment 42 in a direction perpendicular to the plane where the first coil 4 is located.

[0092] In other embodiments, the second coil 6 and the first coil 4 may have different sizes or shapes. In this case, the second coil 6 may be wrapped around the first coil 4 , or the first coil 4 may be wrapped around the second coil 6 .

[0093] For ease of explanation, in the embodiments of the present application, the second coil 6 is usually taken as an example to illustrate that the shape and size are consistent or close to the first coil 4, and the second coil 6 and the first coil 4 can be staggered in a direction perpendicular to the plane where the first coil 4 is located, which does not constitute a specific limitation here.

[0094] In this embodiment, by making the projection of the second coil 6 on the circuit board 1 overlap at least partially with the projection of the first coil 4 on the circuit board 1, the effective detection range of the second coil 6 can include at least part of the NFC blind area of the first coil 4. For example, when the outer contour dimensions of the second coil 6 and the first coil 4 are consistent, and the center positions of the projections of the second coil 6 and the first coil 4 on the circuit board 1 overlap, the effective detection range of the second coil 6 can include the entire NFC blind area of the first coil 4. In this way, after the first coil 4 fails to detect a slave device near the electronic device, if the second coil 6 also fails to detect a slave device near the electronic device, it can be determined that the distance between the electronic device and the slave device is far, or the slave device is faulty, etc. At this time, the user can adjust the distance between the mobile phone and the slave device, check the quality of the slave device, and take other measures, and repeat steps 1a to 6a after the user takes measures.

[0095] Step 7a: Use the second coil 6 to perform a card reading / swiping operation.

[0096] In this step, the electronic device uses the NFC antenna including the second coil 6 to perform NFC communication with the slave device to realize the card reading / swiping function. After the card reading / swiping operation is completed, the NFC communication is completed.

[0097] In this embodiment, the complementary advantages of the blind areas of the two working states corresponding to the first coil 4 and the second coil 6 are utilized to ensure that there is no blind area within the working range near the complete NFC antenna, thereby improving the NFC communication reliability of the electronic device.

[0098] As an optional implementation, Figure 9 As shown, the electronic device in the embodiment of the present application further includes: a first controller 5;

[0099] The first controller 5 is electrically connected to the control end of the switch 7;

[0100] The first controller 5 sends the first signal or the second signal to the switch 7 at different times;

[0101] The switch 7 switches the electronic device to a first working state in response to the first signal; the switch 7 switches the electronic device to a second working state in response to the second signal;

[0102] In the first working state, the first coil is electrically connected to the NFC radio frequency circuit, and the second coil is disconnected from the NFC radio frequency circuit; in the second working state, the second coil is electrically connected to the NFC radio frequency circuit, and the first coil is disconnected from the NFC radio frequency circuit.

[0103] In some embodiments, the first controller 5 may be a processor in the electronic device, or any other device with a control function.

[0104] In this embodiment, the first controller 5 controls the switching state of the switch 7 so that the electronic device is in the first working state or the second working state at different times, so that 0 blind spots in NFC detection can be achieved.

[0105] As an alternative embodiment, as Figure 13 shown, the electronic device according to the embodiment of the present application further includes: a conductive strip E and a switching module 9;

[0106] The conductive strip E is located between the third sub-segment 421 and the fourth sub-segment 422, and the conductive strip E, the third sub-segment 421 and the fourth sub-segment 422 are arranged at intervals from each other;

[0107] The switching module 9 is respectively connected to the conductive strip E, the first sub-segment 411, the second sub-segment 412, the third sub-segment 421 and the fourth sub-segment 422;

[0108] Wherein, the electronic device includes a third working state, a fourth working state and a fifth working state:

[0109] In the third working state, the switching module 9 conducts the first sub-segment 411, the second sub-segment 412, the third sub-segment 421 and the fourth sub-segment 422. At this time, the NFC coil is the first coil as Figure 14 shown, and the conductive strip E is disconnected from the first sub-segment 411 and the second sub-segment 412;

[0110] In the fourth working state, the switching module 9 conducts the first sub-segment 411, the third sub-segment 421, the second sub-segment 412 and the conductive strip E, and the fourth sub-segment 422 is disconnected from the first sub-segment 411 and the second sub-segment 412, forming a third coil 71 as Figure 15 shown, that is, the NFC coil at this time is the third coil 71;

[0111] In the fifth working state, the switching module 9 conducts the first sub-segment 411, the conductive strip E, the second sub-segment 412 and the fourth sub-segment 422, and the third sub-segment 421 is disconnected from the first sub-segment 411 and the second sub-segment 412, forming a Figure 16The fourth coil 72 shown, that is, the NFC coil at this time is the fourth coil 72.

[0112] In some embodiments, the switching module 9 is respectively connected to the conductive bar E, the first sub-segment 411, the second sub-segment 412, the third sub-segment 421, and the fourth sub-segment 422. It can be: the first end of the switching module 9 is electrically connected to the first sub-segment 411, the second end of the switching module 9 is electrically connected to the third sub-segment 421, the third end of the switching module 9 is electrically connected to the fourth sub-segment 422, and the fourth end of the switching module 9 is electrically connected to the first end of the conductive bar E; the fifth end of the switching module 9 is electrically connected to the second sub-segment 412, the sixth end of the switching module 9 is electrically connected to the third sub-segment 421, the seventh end of the switching module 9 is electrically connected to the fourth sub-segment 422, and the eighth end of the switching module 9 is electrically connected to the second end of the conductive bar E.

[0113] At this time, in the third working state, the switching module 9 electrically connects the two ends of the first sub-segment 411 to the third sub-segment 421 and the fourth sub-segment 422 respectively, and conducts the two ends of the second sub-segment 412 to the third sub-segment 421 and the fourth sub-segment 422 respectively;

[0114] In the fourth working state, the switching module 9 electrically connects the two ends of the first sub-segment 411 to the third sub-segment 421 and the first end of the conductive bar E respectively, and electrically connects the two ends of the second sub-segment 412 to the third sub-segment 421 and the second end of the conductive bar E respectively;

[0115] In the fifth working state, the switching module 9 electrically connects the two ends of the first sub-segment 411 to the first end of the conductive bar E and the fourth sub-segment 422 respectively, and electrically connects the two ends of the second sub-segment 412 to the second end of the conductive bar E and the fourth sub-segment 422 respectively.

[0116] In some embodiments, the switching module 9 can be a combination of multiple switches, such as 6 switches, as Figure 13 shown, where the first switch is used to switch the on / off between the left end of the third sub-segment 421 and the first sub-segment 411; the second switch is used to switch the on / off between the right end of the third sub-segment 421 and the second sub-segment 412; the third switch is used to switch the on / off between the left end of the fourth sub-segment 422 and the first sub-segment 411; the fourth switch is used to switch the on / off between the right end of the fourth sub-segment 422 and the second sub-segment 412; the fifth switch is used to switch the on / off between the left end of the conductive bar E and the first sub-segment 411; the sixth switch is used to switch the on / off between the right end of the conductive bar E and the second sub-segment 412.

[0117] Of course, the switching module 9 can also be other switch structures, such as 2 three-pole double-throw switches, which are not specifically limited here.

[0118] In some embodiments, in the third operating state, the NFC coil is as shown in Figure 14 . At this time, the NFC coil includes a first coil composed of a first sub-segment 411, a second sub-segment 412, a third sub-segment 421, and a fourth sub-segment 422; in the fourth operating state, the NFC coil is as shown in Figure 15 . At this time, the NFC coil includes a third coil composed of a first sub-segment 411, a second sub-segment 412, a third sub-segment 421, and a conductive bar E; in the fifth operating state, the NFC coil is as shown in Figure 16 . At this time, the NFC coil includes a fourth coil composed of a first sub-segment 411, a second sub-segment 412, a fourth sub-segment 422, and a conductive bar E.

[0119] It should be noted that as shown in Figures 14 to 16 , the third sub-segment 421, the conductive bar E, and the fourth sub-segment 422 are parallel to each other and are arranged in sequence along the direction perpendicular to the third sub-segment 421, so that the blind areas near the third sub-segment 421, the conductive bar E, and the fourth sub-segment 422 are also staggered along the direction perpendicular to the third sub-segment 421. In this way, by switching the third operating state, the fourth operating state, and the fifth operating state, at least part of the blind areas of the fourth operating state and the fifth operating state can be compensated for by using the third operating state; at least part of the blind areas of the third operating state and the fifth operating state can be compensated for by using the fourth operating state; at least part of the blind areas of the third operating state and the fourth operating state can be compensated for by using the fifth operating state, and finally a 0-blind area of the complete NFC antenna can be achieved.

[0120] In some embodiments, if the distance between the conductive bar E and the third sub-segment 421 and the fourth sub-segment 422 is relatively far, then using one of the fourth operating state and the fifth operating state can achieve compensation for all the blind areas in the third operating state. At this time, the switching module 9 can be controlled to switch only between the third operating state and the fourth operating state, or the switching module 9 can be controlled to perform time-sharing switching only between the third operating state and the fifth operating state, and thus a 0-blind area of the NFC antenna can be achieved.

[0121] In some other embodiments, if the distance between the conductive bar E and the third sub-segment 421 and the fourth sub-segment 422 is relatively close, then using the fourth operating state can achieve compensation for a part of the NFC blind area in the third operating state, and using the fifth operating state can achieve compensation for the remaining part of the NFC blind area in the third operating state. At this time, the switching module 9 can be controlled to perform time-sharing switching among the third operating state, the fourth operating state, and the fifth operating state, and finally a 0-blind area of the NFC antenna can be achieved.

[0122] It should be noted that as shown in Figures 13 to 16In the illustrated embodiment, the third sub-segment 421, the conductive strip E, and the fourth sub-segment 422 extend along the length direction of the electronic device and are spaced apart along the length direction of the electronic device. For example, in some other embodiments, as Figure 7 shown, the third sub-segment 421, the conductive strip E, and the fourth sub-segment 422 can also be arranged to extend along the width direction of the electronic device. At this time, the third sub-segment 421, the conductive strip E, and the fourth sub-segment 422 are spaced apart along the width direction of the electronic device.

[0123] In this embodiment, the positions of the segments forming the NFC coil can be switched, so as to form NFC coils with different blind areas. The advantage that the blind areas of at least two of the three working states are complementary enables there to be no blind area within the working range near the complete NFC antenna, improving the NFC communication reliability of the electronic device.

[0124] As an alternative embodiment, as Figure 13 shown, the electronic device in the embodiment of the present application further includes: a second controller 8;

[0125] The second controller 8 is electrically connected to the control end of the switching module 9;

[0126] The second controller 8 is configured to send a third signal, a fourth signal, or a fifth signal to the switching module 9 at different times;

[0127] The switching module 9 switches the electronic device to the third working state in response to the third signal; the switching module 9 switches the electronic device to the fourth working state in response to the fourth signal; the switching module 9 switches the electronic device to the fifth working state in response to the fifth signal.

[0128] In some embodiments, the second controller 8 can be a processor in the electronic device, or any other device with control functions.

[0129] In this embodiment, the second controller 8 controls the switch state of the switching module 9, so that the electronic device is in the third working state, the fourth working state, or the fifth working state at different times. In this way, 0 blind area for NFC detection can be achieved.

[0130] For example: As Figure 13 shown in the embodiment, the electronic device can implement slave device detection according to the NFC detection communication process as Figure 17 shown. The NFC detection communication process includes the following steps: Figure 17 shown, the NFC detection communication process includes the following steps:

[0131] Step 1b: Control the electronic device to be in the third working mode.

[0132] Through step 1b, the first coil 4 can be used as an NFC coil to detect a slave device near the electronic device.

[0133] Step 2b: Determine whether a slave device is detected.

[0134] In this step, if the determination result is "yes", step 3b is executed; if the determination result is "no", step 5b is executed.

[0135] In some embodiments, when no slave device near the electronic device is detected using the first coil 4, there may be two situations. One is that there is no slave device near the electronic device; the other is that the slave device is located in the NFC blind area of the electronic device.

[0136] Step 3b: Use the first coil 4 to perform a card reading / swiping operation.

[0137] In this step, the electronic device uses the NFC antenna including the first coil 4 to perform NFC communication with the slave device to implement the card reading / swiping function.

[0138] Step 4b: The NFC communication is completed.

[0139] Step 5b: Control the electronic device to be in the fourth working mode.

[0140] Through step 5b, a slave device near the electronic device can be detected using the NFC coil including the first sub-segment 411, the second sub-segment 412, the third sub-segment 421, and the conductive bar E.

[0141] Step 6b: Determine whether a slave device is detected.

[0142] In this step, if the determination result is "yes", step 7b is executed; if the determination result is "no", step 8b is executed.

[0143] Step 7b: Perform a card reading / swiping operation, where after the card reading / swiping operation is completed, the NFC communication is completed.

[0144] When a slave device is detected based on the fourth working state, in step 7b, the card reading / swiping operation is performed using the NFC coil including the first sub-segment 411, the second sub-segment 412, the third sub-segment 421, and the conductive bar E.

[0145] Step 8b: Control the electronic device to be in the fifth working mode.

[0146] Through step 8b, a slave device near the electronic device can be detected using the NFC coil including the first sub-segment 411, the second sub-segment 412, the fourth sub-segment 422, and the conductive bar E.

[0147] Step 9b: Determine whether a slave device is detected.

[0148] In this step, if the determination result is "yes", jump to step 7b; if the determination result is "no", jump to step 1b, and repeat steps 1b to 9b.

[0149] When a slave device is detected based on the fifth working state, in step 7b, an NFC coil including the first sub-segment 411, the second sub-segment 412, the fourth sub-segment 422, and the conductive bar E is used to perform a card reading / swiping operation. After the card reading / swiping operation is completed through step 7b, the NFC communication is completed.

[0150] As an alternative implementation, as Figure 4 and Figure 7 shown, the first coil 4 is located in the first area W of the electronic device. The first area W is located on one side of the first symmetry axis H of the electronic device, and the first symmetry axis H is parallel to the width direction of the electronic device;

[0151] As Figure 4 shown, the first side and the second side are both parallel to the length direction of the electronic device; or, as Figure 7 shown, the third side and the fourth side are both parallel to the length direction of the electronic device.

[0152] In some embodiments, the electronic device may be a mobile phone. At this time, the first area W may be the area where the upper half is located in the vertical screen state of the mobile phone. In the related art, components such as a frame antenna, a camera, and a flashlight usually need to be arranged in the upper half. Therefore, the position available for arranging the NFC coil in the upper half is very limited.

[0153] In this embodiment, according to the component layout situation of the upper half of the electronic device, it is possible to flexibly adjust which one of the first segment 41 and the second segment 42 is arranged inside the circuit board 1 and which one is arranged on the side of the bracket 2 facing away from the circuit board 1, which can improve the layout flexibility of the components in the upper half of the electronic device.

[0154] For example: as Figure 7 shown, the third side and the fourth side are both parallel to the length direction of the electronic device;

[0155] The electronic device further includes: a camera 10 and a first component 20;

[0156] At least a part of the first component 20 and the camera 10 are located in the first area W;

[0157] The second sub-segment 412 is disposed within the circuit board 1, and the projection area of the second sub-segment 412 on the bracket 2 at least partially overlaps with the areas where the camera 10 and the first device 20 are located.

[0158] In some embodiments, the first device 20 can be any device fixed on the bracket 2, such as infrared, flash and other modules, which are not specifically limited herein.

[0159] In this embodiment, by disposing the second sub-segment 412, which originally needed to pass through the gap between the camera 10 and the first device 20 on the bracket 2, within the circuit board 1, there is no need to reserve a gap matching the second sub-segment 412 between the camera 10 and the first device 20, which can improve the layout flexibility of the camera 10 and the first device 20.

[0160] As an alternative embodiment, as Figure 4 shown, the electronic device further includes: an antenna 30, and the antenna 30 is disposed on the first side frame of the electronic device, such as Figure 4 the left side frame and the right side frame in

[0161] The first side or the second side includes the side of the first coil 4 with the smallest distance from the first side frame.

[0162] In some embodiments, the antenna 30 refers to other antennas on the electronic device different from the NFC antenna, such as main antennas like cellular antennas, WiFi antennas, etc.

[0163] Optionally, the first segment 41 is clamped between at least two wiring layers of the circuit board 1. In this way, by clamping the first segment 41 between at least two wiring layers of the circuit board 1, the wiring layers on both sides of the first segment 41 shield the external radiation of the first segment 41, reducing the interference of the first sub-segment 411 and the second sub-segment 412 to the antenna 30.

[0164] In this embodiment, by disposing the segments of the first side or the second side of the first coil 4 that are closest to the antenna 30, such as the first sub-segment 411 and the second sub-segment 412, within the circuit board 1, the external radiation of the first sub-segment 411 and the second sub-segment 412 can be weakened. For example, by disposing the first sub-segment 411 and the second sub-segment 412 within the circuit board 1, the distance between the first sub-segment 411 and the second sub-segment 412 and the antenna 30 is increased, and the devices or wiring layers on the circuit board 1 shield the external radiation of the first sub-segment 411 and the second sub-segment 412, or the bracket 2 shields the external radiation of the first sub-segment 411 and the second sub-segment 412, etc., reducing the interference of the first sub-segment 411 and the second sub-segment 412 to the antenna 30 and improving the communication performance of the antenna 30.

[0165] As an alternative embodiment, the first segment 41 is disposed on a wiring layer of the circuit board 1 other than the surface layer facing the bracket 2.

[0166] It should be noted that devices such as a display screen may be provided on the side of the circuit board 1 facing away from the bracket 2. When the first segment 41 is disposed on a wiring layer of the circuit board 1 other than the surface layer facing the bracket 2, for example, the first segment 41 is disposed on the surface layer of the circuit board 1 facing away from the bracket 2, or the first segment 41 is disposed between at least two wiring layers inside the circuit board 1. In this way, the radiation on the side of the first segment 41 facing the bracket 2 is blocked by the wiring layer inside the circuit board 1, and the radiation on the side of the first segment 41 facing away from the bracket 2 may be blocked by the wiring layer inside the circuit board 1 or may also be blocked by other devices such as the display screen of the electronic device.

[0167] In this embodiment, by disposing the first segment 41 on a wiring layer of the circuit board 1 other than the surface layer facing the bracket 2, at least one wiring layer on the circuit board 1 is provided between the first segment 41 and the bracket 2, so that the magnetic field generated by the first segment 41 is confined inside the circuit board 1 layer, and the magnetic field does not radiate outward, improving the effect of reducing the external radiation of the first segment 41, and further improving the reliability of eliminating the NFC blind area.

[0168] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including that element.

[0169] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. An electronic device, characterized in that, Including: A circuit board, a bracket, a near field communication (NFC) radio frequency circuit, and a first coil; The circuit board and the bracket are stacked, the NFC radio frequency circuit is disposed on the circuit board, and the NFC radio frequency circuit is electrically connected to the first coil; The first coil includes a first segment and a second segment, the first segment is disposed within the circuit board, and the second segment is disposed on the bracket; The first segment includes a first sub-segment located on a first side of the first coil and a second sub-segment located on a second side of the first coil; The second segment includes a third sub-segment located on a third side of the first coil and a fourth sub-segment located on a fourth side of the first coil; The first side and the second side are a pair of opposite sides of the first coil, and the third side and the fourth side are another pair of opposite sides of the first coil.

2. The electronic device according to claim 1, wherein Further including: A second coil and a switching switch; The switching switch is electrically connected to the NFC radio frequency circuit, the first coil, and the second coil respectively, and the switching switch is configured to conduct one of the first coil and the second coil to the NFC radio frequency circuit; The second coil includes a third segment and a fourth segment, the third segment is disposed on the bracket, and the fourth segment is disposed within the circuit board; The third segment extends in the same direction as the first segment, and the fourth segment extends in the same direction as the second segment.

3. The electronic device according to claim 2, wherein The projection of the second coil on the circuit board at least partially overlaps the projection of the first coil on the circuit board.

4. The electronic device according to claim 2, wherein Further including: A first controller; The first controller is electrically connected to the control end of the switching switch; The first controller sends a first signal or a second signal to the switching switch at different times; The switching switch switches the electronic device to a first working state in response to the first signal; the switching switch switches the electronic device to a second working state in response to the second signal; In the first working state, the first coil is electrically connected to the NFC radio frequency circuit, and the second coil is electrically disconnected from the NFC radio frequency circuit; in the second working state, the second coil is electrically connected to the NFC radio frequency circuit, and the first coil is electrically disconnected from the NFC radio frequency circuit.

5. The electronic device according to claim 1, characterized in that Further including: A conductive bar and a switching module; The conductive bar is located between the third sub-segment and the fourth sub-segment, and the conductive bar, the third sub-segment, and the fourth sub-segment are spaced apart from each other; The switching module is connected to the conductive bar, the first sub-segment, the second sub-segment, the third sub-segment, and the fourth sub-segment respectively; Wherein, the electronic device includes a third working state, a fourth working state, and a fifth working state: In the third working state, the first sub-segment, the second sub-segment, the third sub-segment, and the fourth sub-segment are conductive, and the conductive bar is disconnected from the first sub-segment and the second sub-segment; In the fourth working state, the first sub-segment, the third sub-segment, the second sub-segment and the conductive bar are electrically connected, and the fourth sub-segment is disconnected from the first sub-segment and the second sub-segment, forming a third coil; In the fifth working state, the first sub-segment, the conductive bar, the second sub-segment and the fourth sub-segment are electrically connected, and the third sub-segment is disconnected from the first sub-segment and the second sub-segment, forming a fourth coil.

6. The electronic device according to claim 5, characterized in that, It further includes: A second controller; The second controller is electrically connected to the control end of the switching module; The second controller is configured to send a third signal, a fourth signal or a fifth signal to the switching module at different times; The switching module switches the electronic device to the third working state in response to the third signal; the switching module switches the electronic device to the fourth working state in response to the fourth signal; the switching module switches the electronic device to the fifth working state in response to the fifth signal.

7. The electronic device according to any one of claims 1 to 6, characterized in that The first coil is located in a first area of the electronic device, the first area is on one side of a first axis of symmetry of the electronic device, and the first axis of symmetry is parallel to the width direction of the electronic device; Both the first side and the second side are parallel to the length direction of the electronic device; or, both the third side and the fourth side are parallel to the length direction of the electronic device.

8. The electronic device according to claim 7, characterized in that, Both the third side and the fourth side are parallel to the length direction of the electronic device; The electronic device further includes: a camera and a first device; At least part of the first device and the camera are located in the first area; And the projection area of the second sub-segment on the bracket at least partially overlaps with the area where the camera and the first device are located.

9. The electronic device according to claim 1, wherein The electronic device further includes: an antenna, and the antenna is arranged on a first side frame of the electronic device; The first side or the second side includes the side of the first coil with the smallest distance from the first side frame.

10. The electronic device according to claim 9, characterized in that, The first segment is clamped between at least two wiring layers of the circuit board.

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