WO2024056000A1

WO2024056000A1 - Electronic device

Info

Publication number: WO2024056000A1
Application number: PCT/CN2023/118613
Authority: WO
Inventors: 曹立鑫; 杨万年
Original assignee: 维沃移动通信有限公司
Priority date: 2022-09-16
Filing date: 2023-09-13
Publication date: 2024-03-21
Also published as: CN116031614A

Abstract

Disclosed in the present invention is an electronic device. The electronic device comprises: a near-field communication antenna, which comprises a first induction coil and a second induction coil, wherein part of the first induction coil overlaps part of the second induction coil; and a switching apparatus, which is connected to both the first induction coil and the second induction coil, and is used for alternately switching between the operation of the first induction coil and the operation of the second induction coil, wherein when the electronic device communicates with an external device by means of the first induction coil or the second induction coil, the switching apparatus maintains the operation of the induction coil.

Description

Electronic equipment

Cross-references to related applications

This application claims priority to the Chinese patent application with application number 202211130420.2 and the invention name "Electronic Equipment" submitted on September 16, 2022, which is fully incorporated into this application by reference.

Technical field

The invention belongs to the technical field of near field communication, and specifically relates to an electronic device.

Background technique

Current electronic devices all have built-in near field communication antennas. The electronic device is brought close to the slave device and the coil on the near field communication antenna built in the electronic device is energized to generate a magnetic field, which in turn causes the coil set in the slave device to be excited by the above magnetic field. The induced current is generated to enable communication between electronic devices and slave devices. For example, there will be an NFC antenna built into the mobile phone. By bringing the mobile phone equipped with the NFC antenna close to the slave device, functions such as swiping bus cards, access control cards or meal cards can be realized.

In this communication method, when the induction coil of the near field communication antenna is misaligned with the coil of the slave device, the coupling current of the slave device generates an induced magnetic field. Since the induced magnetic fields inside and outside the coil of the slave device are in opposite directions, they will cancel each other out. This reduces the total magnetic flux of the slave device, which in turn causes the induced voltage of the induction coil on the near field communication antenna to become smaller, forming an induction blind zone. , the electronic device cannot read the information of the slave device and cannot communicate with the slave device, which affects the user experience.

Contents of the invention

The purpose of the embodiments of the present 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 blind zone.

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

A near field communication antenna, the near field communication antenna includes 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, the switching device is respectively connected to the first induction coil and the second induction coil, and 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.

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

Near field communication antenna, the near field communication antenna includes a first induction coil and a second induction coil, 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 coincides with the fourth end, and the first induction coil and the second induction coil constitute an overall induction coil;

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

In another aspect, an embodiment of the present invention provides an electronic device, including:

Near field communication antenna, the near field communication antenna includes a first induction coil and a second induction coil, the projection of the first induction coil on the surface of the second induction coil is located outside the second induction coil;

In this embodiment of the present invention, a near field communication antenna includes a first induction coil and a second induction coil. The switching device alternately switches 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. In this example, under the condition that one of the two induction coils (for example, the first induction coil) is in the induction blind zone, since the two induction coils partially overlap and partially do not overlap, the other induction coil (for example, the second induction coil) The induction coil) is not located in the induction blind zone, and the induction coil can work normally, thereby solving 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 blind zone.

Description of drawings

Figure 1 is a schematic structural diagram of an electronic device according to a first embodiment of the present invention;

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

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

Figure 4 is a schematic structural diagram of an electronic device according to a second embodiment of the present invention;

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

FIG. 6 is a schematic diagram of the overall sensing dead zone in the electronic device according to the second embodiment of the present invention.

Reference signs:

1. Induction coil; 101. First induction coil; 1011. First end; 1012. Second end; 1013. First via hole; 1014. Fourth via hole; 102. Second induction coil; 1021. Third end ; 1022. Fourth terminal; 1023. Second via hole; 1024. Third via hole; 2. Slave device; 3. First sensing blind area; 4. Second sensing blind area; 5. Vacant area; 6. Single pole double throw switch; 7. Overall sensing blind zone.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of the present invention.

The terms "first", "second", etc. in the description and claims of the present invention are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the figures so used are interchangeable under appropriate circumstances so that embodiments of the invention can be practiced in sequences other than those illustrated or described herein, and that "first," "second," etc. are distinguished Objects are usually of one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

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

The electronic device of the present invention may be a mobile phone, a tablet computer, a notebook computer, a wearable device, etc. In the embodiment of the present invention, the electronic device is a mobile phone as an example for explanation.

As shown in FIGS. 1 to 3 , the electronic device includes a near field communication antenna, and the near field communication antenna includes an induction coil. For example, the induction coil 1 includes: a first induction coil 101 and a second induction coil 102 . A part of the first induction coil 101 and a part of the second induction coil 102 overlap.

Switching device, the switching device is connected to the first induction coil 101 and the second induction coil 102 respectively. 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 the first induction coil 101 or the second induction coil 102, the switching device maintains the operation of the induction coil.

Specifically, the electronic device is, for example, a mobile phone. A near field communication antenna is provided in the mobile phone casing. The near field communication antenna is an NFC antenna. The electronic device communicates with the slave device 2 via a near field communication antenna. In one scenario, slave device 2 is a subway gate. When the mobile phone is close to the card swiping area of the subway gate, communication can occur between the mobile phone and the gate, causing the gate to open.

The electronic device also includes a processor, a power supply, etc. The processor and power supply are arranged in the mobile phone casing, and the electronic device performs calculations, receives or sends instructions through the processor, and processes data. For example, the processor is a chip, and the chip is installed in the mobile phone.

The switching device alternately switches the first induction coil 101 and the second induction coil 102 into working states. For example, when the first induction coil 101 is in the working state, the mobile phone communicates with the slave device 2 through the first induction coil 101 . At this time, the second induction coil 102 is in an inactive state. When the second induction coil 102 is in the working state, the mobile phone communicates with the slave device 2 through the second induction coil 102 . At this time, the first induction coil 101 is in an inactive state. When the NFC function on the mobile phone is turned on, the first induction coil 101 and the second induction coil The coil 102 switches once every set time. For example, the interval is 0.2s. Of course, the interval time is not limited here, and those skilled in the art can set it according to actual needs. In a card swiping operation, the electronic device communicates through the first induction coil 101 or the second induction coil 102 . When the user performs a card swiping operation, at a certain moment, the switching device switches to the first induction coil 101 to work and the second induction coil 102 to not work. If the first induction coil 101 is located in the card swiping blind area, such as the first card swiping blind area, the electronic device cannot communicate through the first induction coil 101 at the card swiping position. After the set time interval, the switching device switches to the second induction coil 102 to work, and the first induction coil 101 does not work. 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 area. In this way, the second induction coil 102 can generate an induced voltage. After sensing the induced voltage, the processor sends a control instruction to the switching device to maintain the operation of the second induction coil 102 . After receiving the control instruction, the switching device stops alternately switching the two induction coils and maintains the operation of the second induction coil 102, thereby achieving normal communication between the electronic device and the slave device 2.

Of course, at other times, the second induction coil 102 may not be able to communicate. The switching device switches to the first induction coil 101 to work.

In this embodiment of the present invention, the near field communication antenna includes a first induction coil 101 and a second induction coil 102 . The switching device alternately switches the operation of the first induction coil 101 and the second induction coil 102. When the 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 the induction coil. In this example, under the condition that one of the two induction coils (for example, the first induction coil 101) is in the induction blind zone, since the two induction coils partially overlap and partially do not overlap, the other induction coil (for example, the first induction coil 101) The second induction coil 102) is not located in the induction blind zone and can work normally, thus 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 the induction blind zone.

In one example, as shown in FIG. 1 , the first induction coil 101 and the second induction coil 102 have different areas. Optionally, the shapes of the first induction coil 101 and the second induction coil 102 are rectangular, circular, oval, track-shaped, etc. The first induction coil 101 and the second induction coil 102 form a spirally wound structure in the radial direction (as shown in FIG. 1 ) or a spirally wound structure in the axial direction. The difference in area can be due to the different diameters, different side lengths, different long sides and short sides of the two induction coils, etc. For example, both the first induction coil 101 and the second induction coil 102 are rectangular. At least one variable side length 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 blind zone 3 and the second induction blind zone 4 can be significantly increased, so that the first induction coil 101 and the second induction coil 102 are not in their respective induction blind zones at the same time.

In one example, as shown in Figure 1, the near field communication antenna includes a substrate. The substrate includes a first surface and a second surface arranged oppositely. The first induction coil 101 is arranged on the first surface, and the second induction coil 102 is arranged on the second surface.

For example, the substrate is the motherboard of the electronic device, and the substrate is the PCB. The first induction coil 101 is fixed on the First surface. The second induction coil 102 is fixed on the second surface through glue. 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 do not interfere with each other, which makes it easy to connect the two induction coils to the substrate. Moreover, the optional layout space of the first induction coil 101 and the second induction coil 102 is larger, which is conducive to achieving the best communication effect of the two induction coils respectively.

In addition, since the first induction coil 101 and the second induction coil 102 are located on different surfaces, their signals interfere with each other to a small extent, and the communication between the electronic devices can be smoother.

In one example, as shown in FIG. 1 , 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 . The first end 1011 and the third end 1021 are both connected to the switching device. The first end 1011 extends from the first surface to the second surface through the first via hole 1013 of the substrate. The fourth end 1022 extends from the second surface to the first surface through the second via hole 1023 of the substrate and is connected to the second end 1012 .

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

The switching device switches the connection with the first end 1011 or the third end 1021 to realize the operation of the first induction coil 101 or the second induction coil 102 . The first via hole 1013 and the second via hole 1023 are both metalized through holes that penetrate the substrate. Welding pads are respectively provided at both ends of the first via hole 1013 and the second via hole 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 end 1011 extends from the first surface to the second surface through the first via hole 1013 of the substrate. The third end 1021 is located on the second surface. In this way, the connection of the switching device to the first induction coil 101 and the second induction coil 102 becomes easy. The fourth end 1022 extends from the second surface to the first surface through the second via hole 1023 and is connected to the second end 1012 . In this way, only one of the fourth end 1022 and the second end 1012 needs to be connected to other components, thereby simplifying the connection between the first induction coil 101 and the second induction coil 102 and other components. For example, the second end 1012 extends to the second surface through the fourth via 1014 . The fourth via 1014 is connected to other components.

In addition, 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 prevents the wire ends of different polarities of the two induction coils from interfering with each other, avoids the occurrence of short circuit, and simplifies the electrical connection process.

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. The first induction coil 101 and the second induction coil 102 are arranged in a staggered position.

In this example, the first induction coil 101 and the second induction coil 102 have the same size and shape. First The center of the induction coil 101 and the center of the second induction coil 102 do not coincide with each other, so that the first induction coil 101 and the second induction coil 102 are misaligned. Alternatively, if neither the first induction coil 101 nor the second induction coil 102 is circular, the corresponding parts of the two induction coils may be staggered to form a staggered arrangement of the two induction coils.

In this way, the induction dead zones of the first induction coil 101 and the second induction coil 102 can be effectively prevented from overlapping, so that when one induction coil cannot communicate, the other induction coil can communicate normally.

In one example, the near field communication antenna includes a substrate. The first induction coil 101 and the 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.

In this example, the first induction coil 101 and the second induction coil 102 are fixed on the first surface or the second surface through glue. 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. The substrate is provided with a blank area in the middle of the second induction coil 102 . The first induction coil 101 is provided in this blank area. The first induction coil 101 and the second induction coil 102 are connected directly or through leads. The entire second induction coil 102 is located outside the first induction coil 101 . In this way, a large difference can be formed between the induction dead zones of the first induction coil 101 and the second induction coil 102, so that when one of the induction coils cannot communicate, the other induction coil can communicate normally.

In one example, as shown in FIGS. 1 and 4 , the switching device includes a single-pole double-throw switch 6 . The fixed 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 alternate switching of the first induction coil 101 and the second induction coil 102.

In an example, as shown in Figures 1 and 4, the first induction coil 101 and the second induction coil 102 are both rectangular. At least two sides of the first induction coil 101 and at least two sides of the second induction coil 102 have different lengths. In this way, it can be ensured that when one of the first induction coil 101 and the second induction coil 102 is located in the induction blind zone, the other is not located in the induction blind zone, thus ensuring normal communication between the electronic device and the slave device 2 .

According to a second embodiment of the present disclosure, an electronic device is provided. As shown in FIG. 4 , the electronic device includes a near field communication antenna. The near field communication antenna 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 with each other. The first induction coil 101 and the second induction coil 102 constitute an integral induction coil.

Switching device, the switching device is connected to the third end 1021 and the first end 1011 respectively. The switching device is used to alternately switch the operation of the first induction coil 101 and the overall induction coil. in the stated 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 the induction coil.

Specifically, as shown in Figures 4-6, the electronic device includes a substrate. The first induction coil 101 and the second induction coil 102 are located on one surface of the substrate. The third terminal 1021 is connected to the switching device. The first end 1011 is connected to the third via hole 1024 of the substrate through a trace located in the substrate. The third via hole 1024 is located outside the second induction coil 102 . The third via hole 1024 is connected to the switching device. The first end 1011 is indirectly connected to the switching device. Parts of the first induction coil 101 and the second induction coil 102 form an empty area 5 . In the vacant area 5, a part of the first induction coil 101 is spaced apart from a part of the second induction coil 102.

In this example, the first induction coil 101 starts from the second end 1012 and gradually spirals outward. The first end 1011 is the end of the first induction coil 101 . The second induction coil 102 starts from the fourth end 1022 and gradually spirals outward. The third end 1021 is the end of the second induction coil 102 . The first induction coil 101 and the second induction coil 102 have the same winding direction, for example, clockwise winding or counterclockwise winding. The first induction coil 101 and the second induction coil 102 are divided from different parts of the entire induction coil, so that the first end 1011 and the fourth end 1022 overlap. The dividing points are the first end 1011 and the fourth end 1022. The third via hole 1024 is located outside the second coil. The third via hole 1024 is provided adjacent to the third end 1021, thereby making it easy to connect the switching device to the first induction coil 101 and the second induction coil 102.

Further, the third via hole 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 hole. The second end 1012 is electrically connected to other components. In this way, a short circuit between the third terminal 1021 and the second terminal 1012 is avoided.

In this example, when the switching device is switched to the third end 1021, the first induction coil 101 and the second induction coil 102 work as a whole induction coil. If the whole induction coil is in the induction blind area, such as the whole induction blind area 7, the switching device is switched to the third via 1024, so that the first induction coil 101 works. Since the first induction coil 101 and the whole induction coil have different areas, the first induction coil 101 will not be in the induction blind area, so the electronic device can communicate with the slave device 2 through the first induction coil 101. The switching device maintains the first induction coil 101 working.

On the contrary, when the switching device switches to the third via hole 1024, if the first induction coil 101 is in the induction blind zone. Then the switching device switches to the third terminal 1021. In this way, the overall induction coil works. Since the area of the first induction coil 101 is different from that of the overall induction coil, the overall induction coil will not be in an induction blind zone. Therefore, the electronic device can communicate with the slave device 2 through the overall induction coil. The switching device maintains the overall induction coil operation.

According to a third embodiment of the present 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 on the plane where the second induction coil 102 is located is located outside the second induction coil 102 .

Different from the previous embodiment, in this example, the first induction coil 101 and the second induction coil 102 do not overlap, but the projection of the first induction coil 101 on the surface of the second induction coil 102 is located on the second induction coil 102 outside. In other words, the first induction coil 101 and the second induction coil 102 are spaced apart. In this way, when one of the induction coils is located in the induction blind zone, the other induction coil is not in the induction blind zone, thereby ensuring normal communication between the electronic device and the slave device 2.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of the present invention, many forms can be made without departing from the spirit of the present invention and the scope protected by the claims, all of which fall within the protection of the present invention.

Claims

An electronic device including:

A near field communication antenna, the near field communication antenna includes 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, the switching device is respectively connected to the first induction coil and the second induction coil, and 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.
An electronic device according to claim 1, wherein the first induction coil and the second induction coil have different areas.
An electronic device according to claim 1, wherein the near field communication antenna includes a substrate, the substrate includes a first surface and a second surface arranged oppositely, and the first induction coil is disposed on the first surface. A surface, the second induction coil is disposed on the second surface.
An electronic device according to claim 3, wherein 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 third ends are connected to the switching device, the first end extends from the first surface to the second surface through the first via hole of the substrate, and the fourth end passes through the substrate. The second via hole extends from the second surface to the first surface and is connected to the second end.
An electronic device according to claim 1, wherein the first induction coil and the second induction coil have the same area, the first induction coil and the second induction coil are stacked, and the first induction coil and the second induction coil are stacked. An induction coil is offset from the second induction coil.
An electronic device according to claim 1, wherein the near field communication antenna includes a substrate, the first induction coil and the second induction coil are disposed on the same surface of the substrate, and the first induction coil The coil is located inside the second induction coil, and the first induction coil is connected to the second induction coil.
An electronic device according to claim 1, wherein the switching device includes a single-pole double-throw switch, and the fixed ends of the single-pole double-throw switch are respectively connected to the first induction coil and the second induction coil. .
An electronic device according to claim 1, wherein the first induction coil and the second induction coil are both rectangular, and at least two sides of the first induction coil are in contact with the second induction coil. At least two sides have different lengths.
An electronic device including:

Near field communication antenna, the near field communication antenna includes a first induction coil and a second induction coil, 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 coincides with the fourth end, so The first induction coil and the second induction coil constitute an integral induction coil;

A switching device, the switching device is connected to the third end and the first end respectively, and the switching device is used to alternately switch the operation of the first induction coil and the overall induction coil. When the electronic equipment passes When the first induction coil or the overall induction coil communicates with an external device, the switching device maintains the operation of the induction coil.
An electronic device including:

Near field communication antenna, the near field communication antenna includes a first induction coil and a second induction coil, the projection of the first induction coil on the surface of the second induction coil is located outside the second induction coil;

A switching device, the switching device is respectively connected to the first induction coil and the second induction coil, and 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.