CN111541038B - NFC antenna circuit structure, electronic equipment and method for enhancing magnetic field intensity - Google Patents

NFC antenna circuit structure, electronic equipment and method for enhancing magnetic field intensity Download PDF

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Publication number
CN111541038B
CN111541038B CN202010354542.4A CN202010354542A CN111541038B CN 111541038 B CN111541038 B CN 111541038B CN 202010354542 A CN202010354542 A CN 202010354542A CN 111541038 B CN111541038 B CN 111541038B
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nfc
nfc coil
coil
power supply
power
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CN111541038A (en
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蒋锐
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention provides a circuit structure of an NFC antenna, electronic equipment and a method for enhancing magnetic field intensity, wherein the circuit structure of the NFC antenna comprises the following components: the NFC device comprises a first NFC coil and a second NFC coil, wherein a gap is formed between the second NFC coil and the first NFC coil; an NFC chip connected with the first NFC coil; a power supply circuit connected to the second NFC coil; and the controller is connected with the first NFC coil, the second NFC coil and the power supply circuit, and controls the power supply circuit to supply power for the second NFC coil under the condition that the first NFC coil and/or the second NFC coil detect NFC signals. The circuit structure provided by the invention can increase the induction distance of NFC by additionally adding a magnetic field intensity coil on the basis of not changing the area of the traditional NFC coil, thereby realizing the improvement of the performance of NFC, and can reduce the area of the coil on the basis of ensuring the constant induction distance of the traditional NFC coil.

Description

NFC antenna circuit structure, electronic equipment and method for enhancing magnetic field intensity
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a circuit structure of an NFC antenna, an electronic device, and a method for enhancing magnetic field strength.
Background
The existing near field communication (Near Field Communication, NFC) antennas have only one coil in design, which often needs a large area, and in order to ensure that the NFC coil can have a maximum area, the coil is often arranged at the most edge of the whole area, that is, winding is started along the edge.
Since e=nbs, N: the number of turns of the coil, B, the magnetic field intensity, S, the coil area, namely the voltage of the induction coil is the product of the three, after the coil is designed, N and S are fixed, and the size of B depends on the signal intensity input by an external POS machine. As the distance increases, the intensity of B decreases, eventually causing an unrecognizable situation.
In summary, the existing NFC antenna design has the problem that the magnetic field strength is reduced along with the increase of the distance, and therefore the magnetic field cannot be effectively identified.
Disclosure of Invention
The embodiment of the invention provides a circuit structure of an NFC antenna, electronic equipment and a method for enhancing magnetic field strength, which are used for solving the problem that the magnetic field strength is reduced along with the increase of distance so as to be incapable of effectively identifying a magnetic field in the conventional NFC antenna design.
In order to solve the above problems, the embodiments of the present invention are implemented as follows:
in a first aspect, an embodiment of the present invention provides a circuit structure of an NFC antenna, including:
a first NFC coil and a second NFC coil, a gap being formed between the second NFC coil and the first NFC coil;
an NFC chip connected with the first NFC coil;
a power supply circuit connected to the second NFC coil;
and the controller is connected with the first NFC coil, the second NFC coil and the power supply circuit, and controls the power supply circuit to supply power to the second NFC coil under the condition that the first NFC coil and/or the second NFC coil detect NFC signals.
In a second aspect, an embodiment of the present invention provides an electronic device, including a receiver and a speaker, and further including the above-mentioned circuit structure of an NFC antenna;
the second NFC coil is a coil of the receiver or the loudspeaker; or alternatively
The second NFC coil is arranged at the edge of the receiver or the loudspeaker.
In a third aspect, an embodiment of the present invention provides a method for enhancing magnetic field strength, which is applied to the circuit structure of the NFC antenna, and the method includes:
and under the condition that the first NFC coil and/or the second NFC coil detect NFC signals, controlling a power supply circuit to supply power to the second NFC coil so that the second NFC coil generates a first electromagnetic field.
According to the technical scheme, on the basis of not changing the area of the traditional NFC coil, the coil is additionally added and the magnetic field strength is generated under the action of current, so that the induction distance of NFC can be increased, the performance of NFC is improved, and the area of the coil can be reduced on the basis of ensuring that the induction distance of the traditional NFC coil is unchanged.
Drawings
Fig. 1 shows a schematic circuit structure of an NFC antenna according to an embodiment of the present invention;
fig. 2 is a schematic diagram showing a positional relationship between a first NFC coil and a second NFC coil according to an embodiment of the invention;
fig. 3 shows a second schematic diagram of a positional relationship between a first NFC coil and a second NFC coil according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a method for enhancing magnetic field strength according to an embodiment of the present invention;
fig. 5 shows a schematic diagram of a hardware structure of an electronic device according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An embodiment of the present invention provides a circuit structure of an NFC antenna, as shown in fig. 1, including:
a first NFC coil 11 and a second NFC coil 12, the second NFC coil 12 forming a gap with the first NFC coil 11;
an NFC chip 2 connected to the first NFC coil 11;
a power supply circuit 3 connected to the second NFC coil 12;
and the controller 4 is connected with the first NFC coil 11, the second NFC coil 12 and the power supply circuit 3, and the controller 4 controls the power supply circuit 3 to supply power to the second NFC coil 12 when the first NFC coil 11 and/or the second NFC coil 12 detect NFC signals.
The circuit structure of the NFC antenna of the embodiment of the invention comprises a first NFC coil 11, a second NFC coil 12, an NFC chip 2, a power supply circuit 3 and a controller 4, wherein the first NFC coil 11 is an original coil and is connected with the NFC chip 2, the second NFC coil 12 is an additional coil, and a gap is formed between the second NFC coil 12 and the first NFC coil 11. The specific form of the gap formed between the first NFC coil 11 and the second NFC coil 12 may be: the first NFC coil 11 and the second NFC coil 12 are close to each other but do not overlap; or the first NFC coil 11 is located inside the second NFC coil 12 with a gap in between; or the second NFC coil 12 is located inside the first NFC coil 11 with a gap in between.
The second NFC coil 12 is connected to the power supply circuit 3, and the first NFC coil 11, the second NFC coil 12 and the power supply circuit 3 are all connected to the controller 4. The shapes of the first NFC coil 11 and the second NFC coil 12 may be the same or different, the shape of the first NFC coil 11 may be a bar shape or a ring shape, and the shape of the corresponding second NFC coil 12 may be a bar shape or a ring shape.
In case the first NFC coil 11 and/or the second NFC coil 12 detects an NFC signal sent by the NFC chip 2, the controller 4 may be notified, and at this time, the controller 4 may control the power supply circuit 3 to supply power to the second NFC coil 12, so that the second NFC coil 12 generates an external electromagnetic field.
According to the process, on the basis of not changing the area of the traditional NFC coil, the coil is additionally added and the magnetic field strength is generated under the action of current, so that the induction distance of NFC can be increased, the performance of NFC is improved, and the area of the coil can be reduced on the basis of ensuring that the induction distance of the traditional NFC coil is unchanged.
Alternatively, in an embodiment of the present invention, as shown in fig. 2 and 3, the first NFC coil 11 and the second NFC coil 12 are both loop coils; the second NFC coil 12 is located inside the area surrounded by the first NFC coil 11, or the first NFC coil 11 is located inside the area surrounded by the second NFC coil 12.
The first NFC coil 11 has a feed end feed1 and a ground end gnd1, the second NFC coil 12 has a feed end feed2 and a ground end gnd2, where the second NFC coil 12 may be located inside or outside the first NFC coil 11, when the second NFC coil 12 is located inside the first NFC coil 11, the second NFC coil 12 is located in an area surrounded by the first NFC coil 11, and when the second NFC coil 12 is located outside the first NFC coil 11, it may be that the first NFC coil 11 is located in an area surrounded by the second NFC coil 12.
Through increasing a coil in original NFC coil's inside or outside, when original NFC coil sensed that there is NFC signal input, for the power supply of applied coil (the preferred voltage can automatically regulated), can let in the original NFC coil except NFC signal applied magnetic field strength B this moment, additionally increased a magnetic field strength B1 that produces by the impressed current. According to the design scheme, the reading distance can be increased without increasing the original coil size, or the area of the coil can be reduced on the premise of not changing the reading distance.
In the structure in which the first NFC coil 11 is disposed inside the area surrounded by the second NFC coil 12, compared with the structure in which the second NFC coil 12 is disposed inside the area surrounded by the first NFC coil 11, the maximum intensity of the externally applied magnetic field and the minimum cancellation effect can be ensured.
Optionally, in an embodiment of the present invention, as shown in fig. 1, in a case where the NFC chip 2 sends an NFC signal to the first NFC coil 11, a first control signal is sent to the controller 4, and the controller 4 controls the power supply circuit 3 to supply power to the second NFC coil 12 according to the first control signal; and/or
In the case that the second NFC coil 12 senses the NFC signal of the first NFC coil 11, sending a second control signal to the controller 4, where the controller 4 controls the power supply circuit 3 to supply power to the second NFC coil 12 according to the second control signal; wherein the NFC signal is sent by the NFC chip 2.
The embodiment of the invention may include a working mode corresponding to the NFC chip 2 sending an NFC signal to the first NFC coil 11, a working mode corresponding to the second NFC coil 12 sensing the NFC signal, and a working mode corresponding to the NFC chip 2 sending an NFC signal to the first NFC coil 11 and the second NFC coil 12 sensing the NFC signal.
For the working mode that the NFC chip 2 sends an NFC signal to the first NFC coil 11, when the NFC chip 2 sends an NFC signal to the first NFC coil 11, a first control signal may be sent to the controller 4 connected to the first NFC coil 11, so that after the controller 4 receives the first control signal, the power supply circuit 3 is controlled to supply power to the second NFC coil 12, so that the second NFC coil 12 generates an external electromagnetic field. Wherein the first control signal sent by the NFC chip 2 needs to be sent to the controller 4 via the first NFC coil 11, since the NFC chip 2 is not directly connected to the controller 4. The first NFC coil 11 may sense an NFC signal.
For the working mode that the second NFC coil 12 senses the NFC signal, when the second NFC coil 12 senses the NFC signal that the NFC chip 2 sends to the first NFC coil 11, a second control signal may be sent to the controller 4 connected to the second NFC coil 12, so that after the controller 4 receives the second control signal, the power supply circuit 3 is controlled to supply power to the second NFC coil 12, so that the second NFC coil 12 generates an external electromagnetic field.
It should be noted that the two modes are different in that: the first is a traditional NFC coil as an induction coil, and the second is an external coil as an induction coil, and the two modes have different induction sensitivity requirements.
For the working modes that the NFC chip 2 sends an NFC signal to the first NFC coil 11 and the second NFC coil 12 senses the NFC signal, the NFC chip 2 sends a first control signal to the controller 4 and the second NFC coil 12 sends a second control signal to the controller 4 when the NFC chip 2 sends the NFC signal to the first NFC coil 11 and the second NFC coil 12 senses the NFC signal. The first NFC coil 11 may send the first control signal to the controller 4 after sensing the NFC signal.
It should be noted that, when the controller 4 controls the power supply circuit 3 to supply power to the second NFC coil 12, if the applied voltage is large enough, no additional magnetic material (such as ferrite) is needed; and the traditional NFC coil can be made very small, and meanwhile, the existing performance can be realized, and even the performance is higher than the existing performance.
Optionally, in an embodiment of the present invention, the controller 4 controls the power supply circuit 3 to supply power to the second NFC coil 12 through a dc voltage according to a first preset time period, so that the second NFC coil 12 generates an electromagnetic field with a constant magnetic field strength in the first preset time period.
When controlling the power supply circuit 3 to supply power, the controller 4 may control the power supply circuit 3 to operate according to a first preset time period, that is, only control the power supply circuit 3 to supply power to the second NFC coil 12 in a specific time period, so as to avoid that the power supply circuit 3 continuously supplies power to the second NFC coil 12, so that the second NFC coil 12 generates an electromagnetic field in the specific time period. If the length of the first preset time period can be set to be 1 minute, the power supply circuit 3 is controlled to supply power to the second NFC coil 12 within the time length of 1 minute, and then the power supply circuit 3 is controlled to supply power within the time length of 1 minute after a certain time interval. And when the power supply circuit 3 supplies power, the power can be supplied through direct-current voltage, so that the second NFC coil 12 generates a stable electromagnetic field with unchanged magnetic field strength.
Optionally, in an embodiment of the present invention, the controller 4 controls the power supply circuit 3 to supply power to the second NFC coil 12 through a variable voltage during a second preset time period, so that the second NFC coil 12 generates the variable magnetic field during the second preset time period.
The controller 4 may control the power supply circuit 3 to supply power to the second NFC coil 12 for a second preset period of time by varying the voltage when controlling the power supply circuit 3 to supply power, so that the second NFC coil 12 generates a varying electromagnetic field for a specific period of time. The controller 4 may control the power supply circuit 3 to supply power to the second NFC coil 12 by a gradually increasing or decreasing voltage, for example.
According to the circuit structure of the NFC antenna, disclosed by the embodiment of the invention, on the basis of not changing the area of a traditional NFC coil, the induction distance of NFC can be increased by additionally adding one coil and generating a magnetic field strength under the action of current, the performance of NFC can be improved, and the area of the coil can be reduced on the basis of ensuring that the induction distance of the traditional NFC coil is unchanged.
The embodiment of the invention also provides electronic equipment, which comprises a receiver and a loudspeaker, and the electronic equipment further comprises the circuit structure of the NFC antenna, wherein the second NFC coil 12 is a coil of the receiver or the loudspeaker; or the second NFC coil 12 is arranged at the edge of the receiver or the speaker.
The additional second NFC coil 12 may be a coil of a receiver or a speaker itself, or may be a coil additionally added (may be connected or not connected to a coil of the receiver or the speaker) at an outer edge of the receiver or the speaker, or even a coil additionally added to the whole structure, so long as a magnetic field generated by the coil passes through the NFC coil.
If an external coil is arranged on the periphery of the receiver or the loudspeaker or the coil of the receiver or the loudspeaker is directly used, the magnetic field can be increased through the external voltage, and the magnetic field generated by the magnet of the receiver or the loudspeaker can be used, so that the performance is better.
The embodiment of the invention also provides a method for enhancing the magnetic field strength, which is applied to the circuit structure of the NFC antenna, as shown in fig. 4, and comprises the following steps:
step 401, in a case that the first NFC coil and/or the second NFC coil detect an NFC signal, controlling a power supply circuit to supply power to the second NFC coil, so that the second NFC coil generates a first electromagnetic field.
The controller is connected with the first NFC coil and the second NFC coil, and under the condition that the first NFC coil and/or the second NFC coil detect NFC signals, the controller can control a power supply circuit connected with the first NFC coil and/or the second NFC coil, so that the power supply circuit supplies power for the additional second NFC coil, and the second NFC coil generates an additional first electromagnetic field.
Wherein, under the condition that the first NFC coil and/or the second NFC coil detect NFC signals, the control power supply circuit supplies power for the second NFC coil, and the method comprises the following steps:
receiving a control signal sent by the first NFC coil and/or the second NFC coil under the condition that the first NFC coil and/or the second NFC coil detect NFC signals;
and controlling the power supply circuit to supply power to the second NFC coil according to the control signal.
After the NFC chip sends an NFC signal to the first NFC coil and the first NFC coil detects the NFC signal, the first control signal may be sent to the controller, or the NFC chip may send the first control signal to the controller through the first NFC coil when the NFC chip sends the NFC signal to the first NFC coil. After the controller receives the first control signal, the power supply circuit can be controlled to supply power for the second NFC coil according to the first control signal.
Under the condition that the second NFC coil senses the NFC signal sent by the NFC chip to the first NFC coil, a second control signal can be sent to a controller connected with the second NFC coil, so that the controller controls the power supply circuit to supply power for the second NFC coil after receiving the second control signal.
The NFC chip can also send NFC signals to the first NFC coil, the first NFC coil sends first control signals to the controller when detecting the NFC signals and the second NFC coil senses the NFC signals, and the second NFC coil sends second control signals to the controller. The NFC chip may also send the first control signal to the controller when sending the NFC signal. The controller controls the power supply circuit to supply power to the second NFC coil after receiving the first control signal and the second control signal.
Wherein, control power supply circuit is for the power supply of second NFC coil, includes:
and controlling the power supply circuit to supply power to the second NFC coil through direct current voltage according to a first preset time period.
When the controller controls the power supply circuit to supply power, the controller can control the power supply circuit to work according to a first preset time period, namely, the controller only controls the power supply circuit to supply power to the second NFC coil in a specific time period, so that the power supply circuit is prevented from continuously supplying power to the second NFC coil, and the second NFC coil generates an electromagnetic field in the specific time period. And when the power supply circuit supplies power, the power can be supplied through direct-current voltage, so that the second NFC coil generates a stable electromagnetic field with unchanged magnetic field intensity.
Wherein, control power supply circuit is for the power supply of second NFC coil still includes:
and controlling the power supply circuit to supply power to the second NFC coil through the changed voltage in a second preset time period.
When the controller controls the power supply circuit to supply power, the controller can control the power supply circuit to supply power for the second NFC coil in a second preset time period through the changed voltage, so that the second NFC coil generates a changed electromagnetic field in a specific time period. The electromagnetic field may be changed from strong to weak or from weak to strong, but may be changed from strong to weak, and the description thereof is omitted.
According to the method for enhancing the magnetic field strength, the power supply circuit is controlled to supply power to the second NFC coil under the condition that the first NFC coil and/or the second NFC coil detect NFC signals, the magnetic field strength can be generated by using the additional coil, the induction distance of NFC is improved, the performance of NFC is improved, and the coil area can be reduced on the basis that the induction distance of the traditional NFC coil is unchanged.
Fig. 5 is a schematic hardware structure of an electronic device implementing various embodiments of the present invention, where the electronic device 500 includes, but is not limited to: radio frequency unit 501, network module 502, audio output unit 503, input unit 504, sensor 505, display unit 506, user input unit 507, interface unit 508, memory 509, processor 510, and power source 511.
Wherein, the radio frequency unit 501 includes a circuit structure of the NFC antenna, and the circuit structure includes: a first NFC coil and a second NFC coil, a gap being formed between the second NFC coil and the first NFC coil; an NFC chip connected with the first NFC coil; a power supply circuit connected to the second NFC coil; the first NFC coil, the second NFC coil, and the power supply circuit are connected to the processor 510, and the processor 510 controls the power supply circuit to supply power to the second NFC coil when the first NFC coil and/or the second NFC coil detects an NFC signal.
Optionally, the first NFC coil and the second NFC coil are both loop coils; the second NFC coil is located inside an area surrounded by the first NFC coil, or the first NFC coil is located inside an area surrounded by the second NFC coil.
Optionally, in a case that the NFC chip sends an NFC signal to the first NFC coil, a first control signal is sent to the processor 510, and the processor 510 controls the power supply circuit to supply power to the second NFC coil according to the first control signal; and/or sending a second control signal to the processor 510 when the second NFC coil senses the NFC signal of the first NFC coil, where the processor 510 controls the power supply circuit to supply power to the second NFC coil according to the second control signal; wherein the NFC signal is sent by the NFC chip.
Optionally, the processor 510 controls the power supply circuit to supply power to the second NFC coil by a dc voltage according to a first preset period of time.
Optionally, the processor 510 controls the power supply circuit to supply power to the second NFC coil through the changed voltage for a second preset period of time.
It will be appreciated by those skilled in the art that the electronic device structure shown in fig. 5 is not limiting of the electronic device and that the electronic device may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. In the embodiment of the invention, the electronic equipment comprises, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer and the like.
Wherein the processor 510 is configured to: and under the condition that the first NFC coil and/or the second NFC coil detect NFC signals, controlling a power supply circuit to supply power to the second NFC coil so that the second NFC coil generates a first electromagnetic field.
Optionally, when the first NFC coil and/or the second NFC coil detect an NFC signal, the control power supply circuit is configured to supply power to the second NFC coil, and the processor 510 is further configured to: receiving a control signal sent by the first NFC coil and/or the second NFC coil under the condition that the first NFC coil and/or the second NFC coil detect NFC signals; and controlling the power supply circuit to supply power to the second NFC coil according to the control signal.
Optionally, when the control power supply circuit supplies power to the second NFC coil, the processor 510 is further configured to: and controlling the power supply circuit to supply power to the second NFC coil through direct current voltage according to a first preset time period.
Optionally, when the control power supply circuit supplies power to the second NFC coil, the processor 510 is further configured to: and controlling the power supply circuit to supply power to the second NFC coil through the changed voltage in a second preset time period.
Therefore, on the basis of not changing the area of the traditional NFC coil, a coil is additionally added, and the magnetic field strength is generated under the action of current, so that the induction distance of NFC is improved, the performance of NFC is improved, and the area of the coil can be reduced on the basis of ensuring that the induction distance of the traditional NFC coil is unchanged.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 501 may be used to receive and send information or signals during a call, specifically, receive downlink data from a base station, and then process the downlink data with the processor 510; and, the uplink data is transmitted to the base station. Typically, the radio frequency unit 501 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 501 may also communicate with networks and other devices through a wireless communication system.
The electronic device provides wireless broadband internet access to the user through the network module 502, such as helping the user to send and receive e-mail, browse web pages, access streaming media, and the like.
The audio output unit 503 may convert audio data received by the radio frequency unit 501 or the network module 502 or stored in the memory 509 into an audio signal and output as sound. Also, the audio output unit 503 may also provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the electronic device 500. The audio output unit 503 includes a speaker, a buzzer, a receiver, and the like. The second NFC coil is a coil of a receiver or a loudspeaker; or the second NFC coil is disposed at an edge of the receiver or speaker.
The input unit 504 is used for receiving an audio or video signal. The input unit 504 may include a graphics processor (Graphics Processing Unit, GPU) 5041 and a microphone 5042, the graphics processor 5041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 506. The image frames processed by the graphics processor 5041 may be stored in the memory 509 (or other storage medium) or transmitted via the radio frequency unit 501 or the network module 502. Microphone 5042 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 501 in case of a phone call mode.
The electronic device 500 also includes at least one sensor 505, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 5061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 5061 and/or the backlight when the electronic device 500 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when stationary, and can be used for recognizing the gesture of the electronic equipment (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; the sensor 505 may further include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described herein.
The display unit 506 is used to display information input by a user or information provided to the user. The display unit 506 may include a display panel 5061, and the display panel 5061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 507 is operable to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the electronic device. Specifically, the user input unit 507 includes a touch panel 5071 and other input devices 5072. Touch panel 5071, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on touch panel 5071 or thereabout using any suitable object or accessory such as a finger, stylus, etc.). Touch panel 5071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 510, and receives and executes commands sent by the processor 510. In addition, the touch panel 5071 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 5071, the user input unit 507 may include other input devices 5072. In particular, other input devices 5072 may include, but are not limited to, physical keyboards, function keys (e.g., volume control keys, switch keys, etc.), trackballs, mice, joysticks, and so forth, which are not described in detail herein.
Further, the touch panel 5071 may be overlaid on the display panel 5061, and when the touch panel 5071 detects a touch operation thereon or thereabout, the touch operation is transmitted to the processor 510 to determine a type of touch event, and then the processor 510 provides a corresponding visual output on the display panel 5061 according to the type of touch event. Although in fig. 5, the touch panel 5071 and the display panel 5061 are two independent components for implementing the input and output functions of the electronic device, in some embodiments, the touch panel 5071 and the display panel 5061 may be integrated to implement the input and output functions of the electronic device, which is not limited herein.
The interface unit 508 is an interface for connecting an external device to the electronic apparatus 500. For example, the external devices may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 508 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the electronic apparatus 500 or may be used to transmit data between the electronic apparatus 500 and an external device.
The memory 509 may be used to store software programs as well as various data. The memory 509 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, the memory 509 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.
The processor 510 is a control center of the electronic device, connects various parts of the entire electronic device using various interfaces and lines, and performs various functions of the electronic device and processes data by running or executing software programs and/or modules stored in the memory 509, and calling data stored in the memory 509, thereby performing overall monitoring of the electronic device. Processor 510 may include one or more processing units; preferably, the processor 510 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 510.
The electronic device 500 may also include a power supply 511 (e.g., a battery) for powering the various components, and preferably the power supply 511 may be logically connected to the processor 510 via a power management system that performs functions such as managing charging, discharging, and power consumption.
In addition, the electronic device 500 includes some functional modules, which are not shown, and will not be described herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

Claims (9)

1. A circuit structure of an NFC antenna, comprising:
a first NFC coil (11) and a second NFC coil (12), a gap being formed between the second NFC coil (12) and the first NFC coil (11);
an NFC chip (2) connected to the first NFC coil (11);
a power supply circuit (3) connected to the second NFC coil (12);
a controller (4) connected to the first NFC coil (11), the second NFC coil (12) and the power supply circuit (3), where the controller (4) controls the power supply circuit (3) to supply power to the second NFC coil (12) when the first NFC coil (11) detects an NFC signal;
the first NFC coil (11) and the second NFC coil (12) are annular coils;
the second NFC coil (12) is located inside an area surrounded by the first NFC coil (11), or the first NFC coil (11) is located inside an area surrounded by the second NFC coil (12).
2. The circuit structure of an NFC antenna according to claim 1, wherein,
transmitting a first control signal to the controller (4) under the condition that the NFC chip (2) transmits an NFC signal to the first NFC coil (11), and controlling the power supply circuit (3) to supply power to the second NFC coil (12) by the controller (4) according to the first control signal; and/or
Transmitting a second control signal to the controller (4) under the condition that the second NFC coil (12) senses the NFC signal of the first NFC coil (11), and controlling the power supply circuit (3) to supply power to the second NFC coil (12) by the controller (4) according to the second control signal; wherein the NFC signal is sent by the NFC chip (2).
3. A circuit arrangement of an NFC antenna according to claim 1, characterised in that the controller (4) controls the power supply circuit (3) to supply the second NFC coil (12) with a dc voltage for a first preset period of time.
4. A circuit arrangement of an NFC antenna according to claim 1, characterised in that the controller (4) controls the power supply circuit (3) to supply the second NFC coil (12) with a varying voltage for a second preset period of time.
5. An electronic device comprising a receiver and a speaker, characterized in that the electronic device further comprises a circuit structure of an NFC antenna as claimed in any of claims 1 to 4;
the second NFC coil (12) is a coil of the receiver or the loudspeaker; or alternatively
The second NFC coil (12) is arranged at the edge of the receiver or the loudspeaker.
6. A method for enhancing magnetic field strength, applied to the circuit structure of the NFC antenna according to claim 1, wherein the method comprises:
and under the condition that the first NFC coil detects an NFC signal, controlling a power supply circuit to supply power to the second NFC coil so as to enable the second NFC coil to generate a first electromagnetic field.
7. The method of claim 6, wherein the controlling the power supply circuit to power the second NFC coil in the case where the first NFC coil and/or the second NFC coil detect an NFC signal comprises:
receiving a control signal sent by the first NFC coil and/or the second NFC coil under the condition that the first NFC coil and/or the second NFC coil detect NFC signals;
and controlling the power supply circuit to supply power to the second NFC coil according to the control signal.
8. The method of claim 6, wherein the controlling the power circuit to power the second NFC coil comprises:
and controlling the power supply circuit to supply power to the second NFC coil through direct current voltage according to a first preset time period.
9. The method of claim 6, wherein the controlling the power circuit to power the second NFC coil comprises:
and controlling the power supply circuit to supply power to the second NFC coil through the changed voltage in a second preset time period.
CN202010354542.4A 2020-04-29 2020-04-29 NFC antenna circuit structure, electronic equipment and method for enhancing magnetic field intensity Active CN111541038B (en)

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US9515513B2 (en) * 2013-05-13 2016-12-06 Sony Corporation Mobile device and combo coil module
CN103904424A (en) * 2013-12-20 2014-07-02 上海坤锐电子科技有限公司 Passive-signal enhancement antenna sheet for iphone full-card NFC scheme
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