Electronic device

Abstract

The application discloses an electronic device. The electronic device comprises a near field communication antenna, the near field communication antenna comprising a first induction coil and a second induction coil, a part of the first induction coil and a part of the second induction coil overlapping; a switching device, the switching device being connected with the first induction coil and the second induction coil respectively, the switching device being used for alternately switching the first induction coil and the second induction coil to work, in the case that the electronic device communicates with an external device through the first induction coil or the second induction coil, the switching device maintaining the induction coil to work.

Description

Technical Field

[0001] This invention belongs to the field of near-field communication technology, and specifically relates to an electronic device. Background Technology

[0002] Most electronic devices nowadays have built-in near-field communication (NFC) antennas. When an electronic device is brought close to a slave device, the coil on the built-in NFC antenna is energized, generating a magnetic field. This magnetic field then induces a current in the coil within the slave device, enabling communication between the two devices. For example, mobile phones have built-in NFC antennas. By bringing an NFC-enabled phone close to a slave device, functions such as swiping public transport cards, access cards, or meal cards can be achieved.

[0003] In this communication method, when the induction coil of the near-field communication antenna is misaligned with the coil of the slave device, the coupled current of the slave device generates an induced magnetic field. Since the induced magnetic fields inside and outside the slave device coil are opposite, they cancel each other out. This reduces the total magnetic flux of the slave device, which in turn reduces the induced voltage of the induction coil on the near-field communication antenna, creating an induction dead zone. The electronic device cannot read the information from the slave device and cannot communicate with it, affecting the user experience. Summary of the Invention

[0004] The purpose of this invention is to provide an electronic device that solves the problem that the electronic device cannot communicate with the slave device when the induction coil of the near-field communication antenna is in the induction dead zone.

[0005] On one hand, embodiments of the present invention provide an electronic device, including:

[0006] A near-field communication antenna, the near-field communication antenna including a first induction coil and a second induction coil, wherein a portion of the first induction coil and a portion of the second induction coil overlap;

[0007] A switching device is provided, which is connected to the first induction coil and the second induction coil respectively. The switching device is used to alternately switch the operation of the first induction coil and the second induction coil. When the electronic device communicates with an external device through the first induction coil or the second induction coil, the switching device maintains the operation of the induction coil.

[0008] On the other hand, embodiments of the present invention provide an electronic device, including:

[0009] A near-field communication antenna, comprising a first induction coil and a second induction coil, wherein the first induction coil is located inside the second induction coil, the first induction coil includes a first end and a second end, the second induction coil includes a third end and a fourth end, the first end and the fourth end coincide, and the first induction coil and the second induction coil constitute an integral induction coil.

[0010] A switching device is connected to the third end and the first end respectively. The switching device is used to alternately switch the operation of the first induction coil and the overall induction coil. When the electronic device communicates with an external device through the first induction coil or the overall induction coil, the switching device maintains the operation of the induction coil.

[0011] In another aspect, embodiments of the present invention provide an electronic device, comprising:

[0012] A near-field communication antenna, comprising a first induction coil and a second induction coil, wherein the projection of the first induction coil onto the surface of the second induction coil is located outside the second induction coil;

[0013] A switching device is provided, which is connected to the first induction coil and the second induction coil respectively. The switching device is used to alternately switch the operation of the first induction coil and the second induction coil. When the electronic device communicates with an external device through the first induction coil or the second induction coil, the switching device maintains the operation of the induction coil.

[0014] In this embodiment of the invention, the near-field communication antenna includes a first induction coil and a second induction coil. A switching device alternately switches the operation of the first and second induction coils. When an electronic device communicates with an external device through either the first or the second induction coil, the switching device maintains the operation of that induction coil. In this example, when one of the two induction coils (e.g., the first induction coil) is in a dead zone, because the two induction coils partially overlap and partially do not overlap, the other induction coil (e.g., the second induction coil) is not in a dead zone and can operate normally. This solves the problem that the electronic device cannot communicate with the slave device when the induction coil of the near-field communication antenna is in a dead zone. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the first embodiment of the electronic device of the present invention;

[0016] Figure 2 This is a schematic diagram of the first sensing blind zone in the first embodiment of the electronic device of the present invention;

[0017] Figure 3 This is a schematic diagram of the second sensing blind zone in the first embodiment of the electronic device of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of the second embodiment of the electronic device of the present invention;

[0019] Figure 5 This is a schematic diagram of the first sensing blind zone in the second embodiment of the electronic device of the present invention;

[0020] Figure 6 This is a schematic diagram of the overall sensing blind zone in the second embodiment of the electronic device of the present invention.

[0021] Figure label:

[0022] 1. Induction coil; 101. First induction coil; 1011. First end; 1012. Second end; 1013. First via; 1014. Fourth via; 102. Second induction coil; 1021. Third end; 1022. Fourth end; 1023. Second via; 1024. Third via; 2. Slave device; 3. First induction dead zone; 4. Second induction dead zone; 5. Unoccupied area; 6. Single-pole double-throw switch; 7. Overall induction dead zone. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0024] The terms "first," "second," etc., used in the specification and claims of this invention are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0025] The electronic device provided in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0026] The electronic device of the present invention can be a mobile phone, tablet computer, laptop computer, wearable device, etc. In this embodiment of the invention, a mobile phone is used as an example for illustration.

[0027] like Figures 1-3 As shown, the electronic device includes a near-field communication antenna, which includes an induction coil. For example, the induction coil 1 includes a first induction coil 101 and a second induction coil 102. A portion of the first induction coil 101 and a portion of the second induction coil 102 overlap.

[0028] A switching device is provided, which is connected to both the first induction coil 101 and the second induction coil 102. The switching device is used to alternately switch the operation of the first induction coil 101 and the second induction coil 102. When the electronic device communicates with an external device through either the first induction coil 101 or the second induction coil 102, the switching device maintains the operation of that induction coil.

[0029] Specifically, the electronic device is, for example, a mobile phone. The phone's casing houses a near-field communication (NFC) antenna. The electronic device communicates with slave device 2 via this NFC antenna. In one scenario, slave device 2 is a subway turnstile. When the mobile phone approaches the card reader of the subway turnstile, communication occurs between the phone and the turnstile, causing the turnstile to open.

[0030] The electronic device also includes a processor and a power supply. The processor and power supply are housed within the phone's casing. The electronic device uses the processor to perform calculations, receive or send instructions, and process data. For example, the processor is a chip, and the chip is located inside the phone.

[0031] The switching device alternately switches the first induction coil 101 and the second induction coil 102 between their operating states. For example, when the first induction coil 101 is operating, the mobile phone communicates with the slave device 2 through the first induction coil 101. At this time, the second induction coil 102 is not operating. When the second induction coil 102 is operating, the mobile phone communicates with the slave device 2 through the second induction coil 102. At this time, the first induction coil 101 is not operating. With the NFC function enabled on the mobile phone, the first induction coil 101 and the second induction coil 102 switch at a set interval. For example, the interval is 0.2 seconds. Of course, the interval is not limited here, and those skilled in the art can set it according to actual needs. In a single card swipe operation, the electronic device communicates through either the first induction coil 101 or the second induction coil 102. When the user performs a card swipe operation, at a certain moment, the switching device switches to the first induction coil 101 operating and the second induction coil 102 not operating. If the first induction coil 101 is located in a card-swiping blind zone at the card-swiping position, such as the first card-swiping blind zone, the electronic device cannot communicate through the first induction coil 101. After a set interval, the switching device switches to the second induction coil 102, and the first induction coil 101 is not working. Since the first induction coil 101 and the second induction coil 102 partially overlap and partially do not overlap, the second induction coil 102 is not located in the first card-swiping blind zone. In this way, the second induction coil 102 can generate an induced voltage. After the processor senses this induced voltage, it sends a control command to the switching device to maintain the operation of the second induction coil 102. After receiving the control command, the switching device stops alternating between the two induction coils and maintains the operation of the second induction coil 102, thereby realizing normal communication between the electronic device and the slave device 2.

[0032] Of course, at other times, the second induction coil 102 may be unable to communicate. The switching device then switches to the operation of the first induction coil 101.

[0033] In this embodiment of the invention, the near-field communication antenna includes a first induction coil 101 and a second induction coil 102. A switching device alternately switches the operation of the first induction coil 101 and the second induction coil 102. When an electronic device communicates with an external device through the first induction coil 101 or the second induction coil 102, the switching device maintains the operation of that induction coil. In this example, when one of the two induction coils (e.g., the first induction coil 101) is in a dead zone, since the two induction coils partially overlap and partially do not overlap, the other induction coil (e.g., the second induction coil 102) is not in a dead zone and can operate normally, thereby solving the problem that the electronic device cannot communicate with the slave device 2 when the induction coil of the near-field communication antenna is in a dead zone.

[0034] In one example, such as Figure 1 As shown, the areas of the first induction coil 101 and the second induction coil 102 are different. Optionally, the shapes of the first induction coil 101 and the second induction coil 102 can be rectangular, circular, elliptical, racetrack-shaped, etc. The first induction coil 101 and the second induction coil 102 are spirally wound in the radial direction (e.g., Figure 1 (As shown) or in a spiral wound structure along the axial direction. The difference in area can be due to differences in the diameters, side lengths, or the length and length of the two induction coils. For example, both the first induction coil 101 and the second induction coil 102 are rectangular. At least one side of the first induction coil 101 is smaller than that of the second induction coil 102, so that the area of ​​the first induction coil 101 is smaller than the area of ​​the second induction coil 102. In this way, the difference between the first induction dead zone 3 and the second induction dead zone 4 can be significantly improved, thereby ensuring that the first induction coil 101 and the second induction coil 102 are not simultaneously within their respective induction dead zones.

[0035] In one example, such as Figure 1 As shown, the near-field communication antenna includes a substrate. The substrate includes a first surface and a second surface disposed opposite to each other, the first induction coil 101 is disposed on the first surface, and the second induction coil 102 is disposed on the second surface.

[0036] For example, the substrate is the motherboard of an electronic device, specifically a PCB. A first induction coil 101 is fixed to a first surface with adhesive. A second induction coil 102 is fixed to a second surface with adhesive. In this example, since the first induction coil 101 and the second induction coil 102 are located on different surfaces of the substrate, the two induction coils will not interfere with each other, making the connection between the two induction coils and the substrate easier. Furthermore, the first induction coil 101 and the second induction coil 102 have more optional arrangement space, which is beneficial for each induction coil to achieve optimal communication performance.

[0037] Furthermore, since the first induction coil 101 and the second induction coil 102 are located on different surfaces, the degree of mutual interference between their signals is small, and the communication of electronic devices can be smoother.

[0038] In one example, such as Figure 1As shown, the first induction coil 101 includes a first end 1011 and a second end 1012. The second induction coil 102 includes a third end 1021 and a fourth end 1022. Both the first end 1011 and the third end 1021 are connected to the switching device. The first end 1011 extends from the first surface to the second surface through a first via 1013 of the substrate. The fourth end 1022 extends from the second surface to the first surface through a second via 1023 of the substrate and is connected to the second end 1012.

[0039] In this example, the first terminal 1011 and the second terminal 1012 are the two terminals of the first induction coil 101, respectively. One of the first terminal 1011 and the second terminal 1012 is connected to the positive terminal of the substrate, and the other is connected to the negative terminal of the substrate. The third terminal 1021 and the fourth terminal 1022 are the two terminals of the second induction coil 102, respectively. One of the third terminal 1021 and the fourth terminal 1022 is connected to the positive terminal of the substrate, and the other is connected to the negative terminal of the substrate.

[0040] The switching device enables either the first induction coil 101 or the second induction coil 102 to operate by switching the connection with either the first terminal 1011 or the third terminal 1021. Both the first via 1013 and the second via 1023 are metallized through-holes penetrating the substrate. Pads are provided at both ends of the first via 1013 and the second via 1023 to facilitate electrical connection. The first induction coil 101 and the second induction coil 102 are located on different surfaces of the substrate. The first terminal 1011 extends from the first surface to the second surface through the first via 1013 of the substrate. The third terminal 1021 is located on the second surface. This facilitates the connection of the switching device to the first induction coil 101 and the second induction coil 102. The fourth terminal 1022 extends from the second surface to the first surface through the second via 1023 and connects to the second terminal 1012. Thus, only one of the fourth terminal 1022 and the second terminal 1012 needs to be connected to other components, simplifying the connection of the first induction coil 101 and the second induction coil 102 to other components. For example, the second end 1012 extends to the second surface through the fourth through hole 1014. The fourth through hole 1014 connects to other components.

[0041] Furthermore, the first end 1011 and the third end 1021 are located on the second surface. The second end 1012 and the fourth end 1022 are located on the first surface. This arrangement ensures that the wire ends of the two induction coils with different polarities do not interfere with each other, avoids short circuits, and simplifies the electrical connection process.

[0042] In one example, the first induction coil 101 and the second induction coil 102 have the same area. The first induction coil 101 and the second induction coil 102 are stacked. Alternatively, the first induction coil 101 and the second induction coil 102 are staggered.

[0043] In this example, the first induction coil 101 and the second induction coil 102 are the same size and shape. The centers of the first induction coil 101 and the second induction coil 102 do not coincide, thus creating a misaligned arrangement between the two induction coils. Alternatively, even if neither the first induction coil 101 nor the second induction coil 102 is circular, the misaligned arrangement can be achieved by offsetting corresponding parts of the two induction coils.

[0044] In this way, the overlap of the sensing dead zones of the first induction coil 101 and the second induction coil 102 can be effectively avoided, so that when one induction coil cannot communicate, the other induction coil can communicate normally.

[0045] In one example, the near-field communication antenna includes a substrate. A first induction coil 101 and a second induction coil 102 are disposed on the same surface of the substrate. The first induction coil 101 is located inside the second induction coil 102, and the first induction coil 101 is connected to the second induction coil 102.

[0046] In this example, the first induction coil 101 and the second induction coil 102 are fixed to a first surface or a second surface by adhesive. The first induction coil 101 and the second induction coil 102 are coaxially arranged. The winding directions of the first induction coil 101 and the second induction coil 102 are the same or opposite. A blank area is provided in the middle of the second induction coil 102 on the substrate. The first induction coil 101 is disposed in this blank area. The first induction coil 101 and the second induction coil 102 are directly connected or connected by leads. The second induction coil 102 is located entirely outside the first induction coil 101. In this way, the sensing dead zones of the first induction coil 101 and the second induction coil 102 can form a large difference, so that when one induction coil cannot communicate, the other induction coil can communicate normally.

[0047] In one example, such as Figure 1 , Figure 4 As shown, the switching device includes a single-pole double-throw switch 6. The stationary end of the single-pole double-throw switch 6 is connected to the first induction coil 101 and the second induction coil 102, respectively. The single-pole double-throw switch 6 has a simple structure, is easy to operate, has good reliability, and can realize the alternating switching of the first induction coil 101 and the second induction coil 102.

[0048] In one example, red, such as Figure 1 , Figure 4 As shown, both the first induction coil 101 and the second induction coil 102 are rectangular. At least two sides of the first induction coil 101 have different lengths than at least two sides of the second induction coil 102. In this way, it can be ensured that if one of the first induction coil 101 and the second induction coil 102 is in a sensing dead zone, the other is not, thereby ensuring normal communication between the electronic device and the slave device 2.

[0049] According to a second embodiment of this disclosure, an electronic device is provided. For example... Figure 4 As shown, the electronic device includes a near-field communication antenna, which includes a first induction coil 101 and a second induction coil 102. The first induction coil 101 is located inside the second induction coil 102. The first induction coil 101 includes a first end 1011 and a second end 1012, and the second induction coil 102 includes a third end 1021 and a fourth end 1022. The first end 1011 and the fourth end 1022 coincide. The first induction coil 101 and the second induction coil 102 constitute an integral induction coil.

[0050] A switching device is provided, which is connected to both the third terminal 1021 and the first terminal 1011. The switching device is used to alternately switch the operation of the first induction coil 101 and the overall induction coil. When the electronic device communicates with an external device through the first induction coil 101 or the overall induction coil, the switching device maintains the operation of that induction coil.

[0051] Specifically, such as Figures 4-6 As shown, the electronic device includes a substrate. A first induction coil 101 and a second induction coil 102 are located on one surface of the substrate. A third end 1021 is connected to a switching device. The first end 1011 is connected to a third via 1024 of the substrate via a trace located within the substrate. The third via 1024 is located outside the second induction coil 102. The third via 1024 is connected to the switching device. The first end 1011 is indirectly connected to the switching device. A portion of the first induction coil 101 and the second induction coil 102 forms a void region 5. In the void region 5, portions of the first induction coil 101 and the second induction coil 102 are spaced apart.

[0052] In this example, the first induction coil 101 is spirally wound outwards starting from the second end 1012, with the first end 1011 being the end of the first induction coil 101. The second induction coil 102 is spirally wound outwards starting from the fourth end 1022, with the third end 1021 being the end of the second induction coil 102. The first induction coil 101 and the second induction coil 102 are wound in the same direction, for example, both are wound clockwise or counterclockwise. The first induction coil 101 and the second induction coil 102 are divided into different parts of the overall induction coil, so that the first end 1011 and the fourth end 1022 coincide. The dividing point is the first end 1011 and the fourth end 1022. The third through hole 1024 is located outside the second coil. The third through hole 1024 is arranged adjacent to the third end 1021, thereby facilitating the connection of the switching device with the first induction coil 101 and the second induction coil 102.

[0053] Furthermore, the third via 1024 and the third end 1021 are located on the second surface of the substrate. The second end 1012 extends to the first surface through the fifth via. The second end 1012 is electrically connected to other components. In this way, short circuits between the third end 1021 and the second end 1012 are avoided.

[0054] In this example, when the switching device is switched to the third terminal 1021, the first induction coil 101 and the second induction coil 102 operate as a single induction coil. If this single induction coil is in a sensing dead zone, such as the single sensing dead zone 7, the switching device switches to the third via 1024, thereby activating the first induction coil 101. Since the area of ​​the first induction coil 101 is different from that of the single induction coil, the first induction coil 101 is not in a sensing dead zone; therefore, the electronic device can communicate with the slave device 2 through the first induction coil 101. The switching device maintains the operation of the first induction coil 101.

[0055] Conversely, when the switching device switches to the third via 1024, if the first induction coil 101 is in the sensing dead zone, the switching device switches to the third terminal 1021. In this way, the entire induction coil operates. Since the areas of the first induction coil 101 and the entire induction coil are different, the entire induction coil will not be in the sensing dead zone. Therefore, the electronic device can communicate with the slave device 2 through the entire induction coil. The switching device maintains the operation of the entire induction coil.

[0056] According to a third embodiment of this disclosure, an electronic device is provided. The electronic device includes a near-field communication antenna, which includes a first induction coil 101 and a second induction coil 102. The projection of the first induction coil 101 onto the surface containing the second induction coil 102 is located outside the second induction coil 102.

[0057] A switching device is provided, which is connected to both the first induction coil 101 and the second induction coil 102. The switching device is used to alternately switch the operation of the first induction coil 101 and the second induction coil 102. When the electronic device communicates with an external device through either the first induction coil 101 or the second induction coil 102, the switching device maintains the operation of that induction coil.

[0058] Unlike the previous embodiment, in this example, the first induction coil 101 and the second induction coil 102 do not overlap. Instead, the projection of the first induction coil 101 onto the surface where the second induction coil 102 is located is outside the second induction coil 102. In other words, the first induction coil 101 and the second induction coil 102 are spaced apart. This ensures that when one induction coil is in a dead zone, the other induction coil is not, thus guaranteeing normal communication between the electronic device and the slave device 2.

[0059] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. An electronic device, comprising: The application relates to a near field communication antenna, which comprises a first induction coil and a second induction coil, a part of the first induction coil and a part of the second induction coil overlap; a switching device is connected with the first induction coil and the second induction coil respectively, the switching device is used for alternately switching the first induction coil and the second induction coil to work, and the switching device maintains the induction coil working when the electronic equipment communicates with an external device through the first induction coil or the second induction coil; the near field communication antenna comprises a substrate, the substrate comprises a first surface and a second surface arranged oppositely, the first induction coil is arranged on the first surface, and the second induction coil is arranged on the second surface; the first induction coil comprises a first end and a second end, the second induction coil comprises a third end and a fourth end, the first end and the third end are connected with the switching device, the first end extends from the first surface to the second surface through a first via hole of the substrate, and the fourth end extends from the second surface to the first surface through a second via hole of the substrate and is connected with the second end. The areas of the first induction coil and the second induction coil are different. The areas of the first induction coil and the second induction coil are the same, the first induction coil and the second induction coil are arranged in a stack mode, and the first induction coil and the second induction coil are arranged in a staggered mode. The switching device comprises a single-pole double-throw switch, and the fixed end of the single-pole double-throw switch is connected with the first induction coil and the second induction coil respectively.

2. The electronic device of claim 1, wherein, The first induction coil and the second induction coil are both rectangular, and the lengths of at least two edges of the first induction coil and at least two edges of the second induction coil are different.

3. The electronic device of claim 1, wherein, The application relates to a near field communication antenna, which comprises a first induction coil and a second induction coil, the projection of the first induction coil on the surface where the second induction coil is located is located outside the second induction coil; the near field communication antenna comprises a substrate, the substrate comprises a first surface and a second surface arranged oppositely, the first induction coil is arranged on the first surface, and the second induction coil is arranged on the second surface; the first induction coil comprises a first end and a second end, the second induction coil comprises a third end and a fourth end, the first end and the third end are connected with a switching device, the first end extends from the first surface to the second surface through a first via hole of the substrate, the fourth end extends from the second surface to the first surface through a second via hole of the substrate and is connected with the second end; the switching device is connected with the first induction coil and the second induction coil respectively, and the switching device is used for alternately switching the first induction coil and the second induction coil to work; and the switching device maintains the induction coil working when the electronic equipment communicates with an external device through the first induction coil or the second induction coil.

4. The electronic device of claim 1, wherein, ​ 5. The electronic device of claim 1, wherein, ​ 6. An electronic device, comprising: ​ ​ ​ ​

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