WO2021036776A1 - 一种无线充电方法及电子设备 - Google Patents

一种无线充电方法及电子设备 Download PDF

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Publication number
WO2021036776A1
WO2021036776A1 PCT/CN2020/108285 CN2020108285W WO2021036776A1 WO 2021036776 A1 WO2021036776 A1 WO 2021036776A1 CN 2020108285 W CN2020108285 W CN 2020108285W WO 2021036776 A1 WO2021036776 A1 WO 2021036776A1
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WIPO (PCT)
Prior art keywords
charging coil
electronic device
magnetic field
area
field strength
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PCT/CN2020/108285
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English (en)
French (fr)
Inventor
何泽瑞
于东洋
周佐华
张政学
闪超星
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华为技术有限公司
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Publication of WO2021036776A1 publication Critical patent/WO2021036776A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling

Definitions

  • This application relates to the field of electronic equipment, and in particular to a wireless charging method and electronic equipment.
  • wireless charging technology is more and more widely used in the charging process of electronic devices.
  • wireless charging can be implemented based on the principle of electromagnetic induction.
  • charging coils are provided in the charging device and the electronic device that needs to be charged. When the two charging coils are relatively close, the charging coil in the electronic device is in the magnetic field generated by the charging coil in the charging device, so that the electronic device An induced current will be generated on the charging coil in the battery, and the induced current will be input to the electronic device to realize the wireless charging of the electronic device.
  • wireless charging based on electromagnetic induction mostly adopts the Qi wireless protocol standard introduced by the Wireless Power Consortium (WPC), and the distance that supports wireless charging is millimeter level. Since the slight displacement deviation will directly affect the efficiency of wireless charging, and thus the charging speed, wireless charging has very strict requirements on the alignment of the charging coil.
  • WPC Wireless Power Consortium
  • the charging coil is generally arranged inside the electronic device. Therefore, it is impossible to intuitively perform accurate positioning according to the position of the charging coil. Therefore, the charging speed during the wireless charging process cannot be guaranteed.
  • FIG. 1 is a wireless charging device with a positioning structure in the prior art.
  • the electronic device is put into the positioning structure, so that the charging coil of the electronic device and the charging coil of the charging device can be accurately aligned to ensure the efficiency of wireless charging.
  • this positioning structure has very high requirements on the size of the electronic device, and electronic devices of different sizes cannot share the same charging device. For electronic devices of the same size, if their internal charging coils are set at different positions, they cannot share the same charging device.
  • the embodiments of the present application provide a wireless charging method and electronic equipment, which can improve the accuracy of the alignment of the wireless charging coil, so as to increase the wireless charging speed.
  • an embodiment of the present application provides a wireless charging method, which can be applied to an electronic device provided with a first charging coil.
  • the method may include: when a charging device provided with a second charging coil is used to charge the electronic device through the first charging coil, the electronic device determines the signal strength of the first charging coil, and the signal strength is used to characterize the first charging.
  • the electronic device determines the displacement deviation of the first charging coil relative to the second charging coil according to the signal strength.
  • the electronic device obtains the magnetic field strength at N positions on the first charging coil, where N is an integer greater than or equal to 3.
  • the electronic device determines the displacement direction of the first charging coil relative to the second charging coil according to the magnetic field strength at N positions on the first charging coil.
  • the electronic device prompts the user to move the electronic device according to the displacement deviation and the displacement direction, the moving direction is the direction indicated by the displacement direction, and the moving distance is the distance indicated by the displacement deviation.
  • the electronic device when the electronic device is performing wireless charging, the electronic device can determine the displacement of the first charging coil and the second charging coil of the charging device at the current position according to the signal strength of the first charging coil set on the electronic device in the magnetic field. deviation.
  • the electronic device can also determine the displacement direction of the first charging coil and the second charging coil of the charging device in the current position according to the magnetic field strength of at least three positions on the first charging coil. In this way, the electronic device can prompt the user to move the electronic device according to the displacement deviation and the displacement direction, so that the alignment of the first charging coil and the second charging coil of the electronic device is more accurate, thereby improving the wireless charging speed.
  • the electronic device determines the displacement direction of the first charging coil relative to the second charging coil based on the magnetic field strength at N positions on the first charging coil, including: the electronic device determines the displacement direction of the first charging coil relative to the second charging coil according to the N positions on the first charging coil.
  • the magnitude relationship of the magnetic field strength at each position determines the displacement direction of the first charging coil relative to the second charging coil.
  • the displacement direction is the direction from the geometric center of the first charging coil to the position away from the position with the smallest magnetic field strength among the N positions and close to the position with the largest magnetic field strength among the N positions. In this way, the electronic device can determine the approximate direction of the displacement direction according to the magnetic field strength of at least three positions on the first charging coil.
  • the electronic device obtains the magnetic field strength at N positions on the first charging coil, including: the electronic device obtains the first magnetic field strength B1 of the first position P1 on the first charging coil , The second magnetic field strength B2 at the second position P2 and the third magnetic field strength B3 at the third position P3.
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the first area, which is the area composed of P2, P3, and P0.
  • B2 is smaller than B3, and B2 is smaller than B1
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the second area, which is the area composed of P1, P3, and P0.
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the third area, which is the area composed of P1, P1, and P0. In this way, the electronic device can determine a more accurate direction of the displacement direction according to the relative magnitude relationship of the magnetic field strength of the three positions on the first charging coil.
  • Hall sensors are respectively provided at P1, P2, and P3 of the first charging coil.
  • the electronic device obtains the first magnetic field strength B1 at the first position P1 on the first charging coil, the second magnetic field strength B2 at the second position P2 and the third magnetic field strength B3 at the third position P3, including:
  • the Hall sensor obtains B1, the Hall sensor set at P2 obtains B2, and the Hall sensor set at P3 obtains B3. In this way, the electronic device can obtain the magnetic field strength of three different positions on the first charging coil through the Hall sensor.
  • the electronic device obtains the magnetic field strength at N positions on the first charging coil, including: the electronic device obtains the first magnetic field strength B1 at the first position P1 on the first charging coil , The second magnetic field strength B2 at the second position P2, the third magnetic field strength B3 at the third position P3, and the fourth magnetic field strength B4 at the fourth position P4.
  • P1, P2, P3, and P4 are arranged in a counterclockwise direction on the first charging coil.
  • B1 is the largest and B2 is greater than B4
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area A, which is the area formed by the midpoint of the connection between P1, P0 and P1 and P2 .
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area B, which is the area formed by P2, P0, and the midpoint of the line between P1 and P2. If B2 is the largest and B3 is greater than B1, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area C, which is the area formed by the midpoint of the line connecting P2, P0, P3 and P2. If B3 is the largest and B2 is greater than B4, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area D, which is the area formed by the midpoint of the line connecting P3, P0, P3 and P2.
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area E, which is the area formed by the midpoint of the line connecting P3, P0, P3 and P4. If B4 is the largest and B3 is greater than B1, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area F, which is the area formed by the midpoint of the line connecting P4, P0, P3 and P4. If B4 is the largest and B1 is greater than B3, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area G, which is the area formed by P4, P0, and the midpoint of the line connecting P1 and P4.
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area H, which is the area formed by the midpoint of the line connecting P1, P0, P1 and P4. In this way, the electronic device can determine a more accurate direction of the displacement direction according to the relative magnitude relationship of the magnetic field strength of the four positions on the first charging coil.
  • Hall sensors are respectively provided at P1, P2, P3, and P4 of the first charging coil.
  • the electronic device obtains the first magnetic field strength B1 of the first position P1 on the first charging coil, the second magnetic field strength B2 of the second position P2, the third magnetic field strength B3 of the third position P3 and the fourth magnetic field strength of the fourth position P4 B4 includes: the electronic device acquires B1 through the hall sensor set at P1, acquires B2 through the hall sensor set at P2, acquires B3 through the hall sensor set at P3, and acquires B4 through the hall sensor set at P4. In this way, the electronic device can obtain the magnetic field strength of 4 different positions on the first charging coil through the Hall sensor.
  • the electronic device prompts the user to move the electronic device according to the displacement deviation and the displacement direction, including: the electronic device displays a guide interface according to the displacement deviation and the displacement direction, and the guide interface includes first prompt information and second prompt information .
  • the first prompt information is used to prompt the user in the direction of moving the electronic device, and the direction prompted by the first prompt information is the direction indicated by the displacement direction.
  • the second prompt information is used to prompt the user of the distance to move the electronic device, and the distance prompted by the second prompt information is the distance indicated by the displacement deviation.
  • the electronic device can accurately prompt the user to move the electronic device according to the displacement direction and the displacement deviation, so that the alignment of the first charging coil of the electronic device and the second charging coil of the charging device is more accurate.
  • the electronic device determining the signal strength of the first charging coil includes: the electronic device determining the signal strength according to the induced current on the first charging coil. In this way, the electronic device can determine the signal strength of the first charging coil in the magnetic field of the second charging coil of the charging device at the current position through the magnitude of the induced current on the first charging coil.
  • the electronic device determines the displacement deviation of the first charging coil relative to the second charging coil according to the signal strength, including: the electronic device determines the displacement deviation according to the signal strength and the mapping relationship, and the mapping relationship includes the signal strength and the displacement deviation The corresponding relationship. In this way, the electronic device can accurately determine the displacement deviation based on the determined signal strength.
  • the present application provides an electronic device provided with a first charging coil.
  • the electronic device includes a determining unit, an acquiring unit and a prompting unit.
  • the determining unit is used to determine the signal strength of the first charging coil when the charging device provided with the second charging coil is used to charge the electronic device through the first charging coil, and the signal strength is used to characterize the signal strength of the first charging coil.
  • the displacement deviation of the first charging coil relative to the second charging coil is determined according to the signal strength.
  • the obtaining unit is used to obtain the magnetic field strength at N positions on the first charging coil, where N is an integer greater than or equal to 3.
  • the determining unit is further configured to determine the displacement direction of the first charging coil relative to the second charging coil according to the magnetic field strength at the N positions on the first charging coil.
  • the prompt unit is used to prompt the user to move the electronic device according to the displacement deviation and the displacement direction, the moving direction is the direction indicated by the displacement direction, and the moving distance is the distance indicated by the displacement deviation.
  • the determining unit is configured to determine the displacement direction of the first charging coil relative to the second charging coil according to the magnetic field strength at N positions on the first charging coil, and includes: a determining unit, configured to determine The magnitude relationship of the magnetic field intensity at N positions on the first charging coil determines the displacement direction of the first charging coil relative to the second charging coil.
  • the displacement direction is the direction from the geometric center of the first charging coil to the position away from the position with the smallest magnetic field strength among the N positions and close to the position with the largest magnetic field strength among the N positions.
  • the acquiring unit is used to acquire the magnetic field strength at N positions on the first charging coil, including: the acquiring unit is used to acquire the first position P1 on the first charging coil The first magnetic field strength B1, the second magnetic field strength B2 at the second position P2, and the third magnetic field strength B3 at the third position P3.
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the first area, which is the area composed of P2, P3, and P0.
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the second area, which is the area composed of P1, P3, and P0. If B3 is less than B1 and B3 is less than B2, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the third area, which is the area composed of P1, P1, and P0.
  • Hall sensors are respectively provided at P1, P2, and P3 of the first charging coil.
  • the acquiring unit is used to acquire the first magnetic field strength B1 at the first position P1 on the first charging coil, the second magnetic field strength B2 at the second position P2, and the third magnetic field strength B3 at the third position P3, including: an acquiring unit, using B1 is acquired through the Hall sensor set at P1, B2 is acquired through the Hall sensor set at P2, and B3 is acquired through the Hall sensor set at P3.
  • the obtaining unit when N is 4, the obtaining unit is used to obtain the magnetic field strength at N positions on the first charging coil, and includes: the obtaining unit is used to obtain the first position P1 on the first charging coil
  • P1, P2, P3, and P4 are arranged in a counterclockwise direction on the first charging coil.
  • B1 is the largest and B2 is greater than B4
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area A, which is the area formed by the midpoint of the connection between P1, P0 and P1 and P2 .
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area B, which is the area formed by P2, P0, and the midpoint of the line between P1 and P2. If B2 is the largest and B3 is greater than B1, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area C, which is the area formed by the midpoint of the line connecting P2, P0, P3 and P2. If B3 is the largest and B2 is greater than B4, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area D, which is the area formed by the midpoint of the line connecting P3, P0, P3 and P2.
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area E, which is the area formed by the midpoint of the line connecting P3, P0, P3 and P4. If B4 is the largest and B3 is greater than B1, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area F, which is the area formed by the midpoint of the line connecting P4, P0, P3 and P4. If B4 is the largest and B1 is greater than B3, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area G, which is the area formed by P4, P0, and the midpoint of the line connecting P1 and P4. If B1 is the largest and B4 is greater than B2, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area H, which is the area formed by the midpoint of the line connecting P1, P0, P1 and P4.
  • Hall sensors are respectively provided at P1, P2, P3, and P4 of the first charging coil.
  • the acquiring unit is used to acquire the first magnetic field strength B1 of the first position P1 on the first charging coil, the second magnetic field strength B2 of the second position P2, the third magnetic field strength B3 of the third position P3, and the second magnetic field strength of the fourth position P4.
  • the prompt unit is used to prompt the user to move the electronic device according to the displacement deviation and the displacement direction, including: the prompt unit is used to display the guidance interface according to the displacement deviation and the displacement direction, and the guidance interface includes the first prompt Information and second prompt information.
  • the first prompt information is used to prompt the user in the direction of moving the electronic device, and the direction prompted by the first prompt information is the direction indicated by the displacement direction.
  • the second prompt information is used to prompt the user of the distance to move the electronic device, and the distance prompted by the second prompt information is the distance indicated by the displacement deviation.
  • the determining unit is configured to determine the signal strength of the first charging coil, and includes: a determining unit, configured to determine the signal strength according to the induced current on the first charging coil. In a possible design, the determining unit is configured to determine the displacement deviation of the first charging coil relative to the second charging coil according to the signal strength, and includes: a determining unit, configured to determine the displacement deviation based on the signal strength and the mapping relationship, and the mapping relationship Including the corresponding relationship between signal strength and displacement deviation.
  • this application provides an electronic device.
  • the electronic device includes: a first charging coil, a charging management module, a processor and a memory.
  • the processor, the first charging coil, the charging management module and the memory are coupled.
  • the memory is used to store computer program codes.
  • the computer program codes include computer instructions. When the computer instructions are executed by the electronic device, the electronic device executes the first aspect and the first aspect. In terms of various possible designs, the wireless charging method described.
  • the present application provides a computer-readable storage medium.
  • the computer-readable storage medium may include computer software instructions.
  • the computer software instruction runs in the electronic device, the electronic device is caused to execute the wireless charging method as described in the first aspect and various possible designs of the first aspect.
  • the present application provides a computer program product, which when the computer program product runs on a computer, causes the computer to execute the wireless charging method as described in the first aspect and various possible designs of the first aspect.
  • the present application provides a chip system, which includes a processor and a communication interface, and is used to support electronic devices to implement the functions involved in the above aspects.
  • the chip system also includes a memory, and the memory is used to store the necessary program instructions and data of the electronic device.
  • the chip system can be composed of chips, or include chips and other discrete devices.
  • the present application provides a wireless charging system, which may include an electronic device provided with a first charging coil and a charging device provided with a second charging coil.
  • the charging device can wirelessly charge electronic devices.
  • the electronic device can be used to execute the wireless charging method as described in the first aspect and various possible designs of the first aspect.
  • the chip system of the sixth aspect and the wireless charging system of the seventh aspect can both be used to implement the wireless charging method provided by the first aspect and various possible designs of the first aspect. Therefore, the beneficial effects that can be achieved can refer to the first aspect. Aspects and the beneficial effects of the methods provided by the various possible designs of the first aspect are not repeated here.
  • FIG. 1 is a schematic structural diagram of a wireless charging device with a positioning structure provided in the prior art
  • FIG. 2 is a schematic diagram of the composition of an electronic device provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of the composition of a charging device provided by an embodiment of the application.
  • FIG. 4 is a schematic diagram of a wireless charging scenario provided by an embodiment of the application.
  • FIG. 5 is a schematic flowchart of a wireless charging method provided by an embodiment of this application.
  • FIG. 6 is a schematic diagram of a magnetic field of a power transmission coil provided by an embodiment of the application.
  • FIG. 7 is a schematic diagram of obtaining magnetic field strength according to an embodiment of this application.
  • FIG. 8 is another schematic diagram of obtaining magnetic field strength according to an embodiment of this application.
  • FIG. 9 is a schematic diagram of determining a displacement direction according to an embodiment of the application.
  • FIG. 10 is a schematic diagram of another displacement direction determination provided by an embodiment of this application.
  • FIG. 11 is a schematic diagram of another displacement direction determination provided by an embodiment of the application.
  • FIG. 12 is a schematic diagram of another displacement direction determination provided by an embodiment of this application.
  • FIG. 13 is a schematic diagram of the relative positions of a power receiving coil and a power transmitting coil according to an embodiment of the application;
  • FIG. 14 is a schematic diagram of the relative positions of another power receiving coil and a power transmitting coil provided by an embodiment of the application;
  • 15 is a schematic diagram of the relative positions of another power receiving coil and a power transmitting coil provided by an embodiment of the application;
  • FIG. 16 is a schematic diagram of a guidance interface provided by an embodiment of this application.
  • FIG. 17 is a schematic diagram of another guidance interface provided by an embodiment of the application.
  • FIG. 18 is a schematic diagram of another guidance interface provided by an embodiment of the application.
  • FIG. 19 is a schematic diagram of the logical composition of an electronic device provided by an embodiment of this application.
  • FIG. 20 is a schematic diagram of the logical composition of a chip system provided by an embodiment of the application.
  • the embodiment of the application provides a wireless charging method, which determines the charging coil in the electronic device and the charging in the charging device by determining the signal strength on the charging coil in the electronic device and the magnetic field strength at different positions on the charging coil in the electronic device. The displacement deviation and the displacement direction of the coil, and then prompt the user to move the electronic device accordingly, so that the charging coil on the electronic device is accurately aligned with the charging coil on the charging device, so as to achieve the purpose of improving the wireless charging speed.
  • FIG. 2 is a schematic diagram of the composition of an electronic device 200 according to an embodiment of this application.
  • the electronic device 200 may include a processor 210, a universal serial bus (USB) interface, a charging coil 220, a charging management module 230, a power management module 231, a battery 232, a sensor module 240, and an antenna.
  • USB universal serial bus
  • Antenna 2 mobile communication module, wireless communication module, external memory interface, internal memory, audio module, speaker, receiver, microphone, earphone interface, buttons, motor, indicator, camera, display 250, and user identification module ( subscriber id entification module, SIM) card interface, etc.
  • SIM subscriber id entification module
  • the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device 200.
  • the electronic device 200 may include more or fewer components than shown, or combine certain components, or split certain components, or arrange different components.
  • the illustrated components can be implemented in hardware, software, or a combination of software and hardware.
  • the processor 210 may include one or more processing units.
  • the processor 210 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), and an image signal processor. (image signal processor, ISP), controller, memory, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural-network processing unit (NPU) Wait.
  • AP application processor
  • modem processor modem processor
  • GPU graphics processing unit
  • image signal processor image signal processor
  • ISP image signal processor
  • controller memory
  • video codec digital signal processor
  • DSP digital signal processor
  • NPU neural-network processing unit
  • the different processing units may be independent devices or integrated in one or more processors.
  • the controller may be the nerve center and command center of the electronic device 200.
  • the controller can generate operation control signals according to the instruction operation code and timing signals to complete the control of fetching and executing instructions.
  • the processor 210 may also be provided with a memory for storing instructions and parameters.
  • the memory in the processor 210 is a cache memory.
  • the memory can store instructions or parameters that have just been used by the processor 210 or used cyclically. If the processor 210 needs to use the instruction or parameter again, it can be directly called from the memory. Repeated access is avoided, the waiting time of the processor 210 is reduced, and the efficiency of the system is improved.
  • the processor 210 may include one or more interfaces.
  • the interface may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, and a universal asynchronous transmitter/receiver (universal asynchronous) interface.
  • I2C integrated circuit
  • I2S integrated circuit built-in audio
  • PCM pulse code modulation
  • PCM pulse code modulation
  • UART universal asynchronous transmitter/receiver
  • MIPI mobile industry processor interface
  • GPIO general-purpose input/output
  • SIM interface SIM interface
  • USB interface universal asynchronous transmitter/receiver
  • the charging management module 230 is used to receive charging input from the charging device.
  • the charging device is a wireless charging device with a wired charging function.
  • the charging management module 230 may receive wireless charging input through the charging coil 220 of the electronic device 200. While the charging management module 230 charges the battery 232, it can also supply power to the electronic device through the power management module 231.
  • the power management module 231 is used to connect the battery 232, the charging management module 230 and the processor 210.
  • the power management module 231 receives input from the battery 232 and/or the charging management module 230, and supplies power to the processor 210, internal memory, external memory, display screen 250, camera, and wireless communication module.
  • the power management module 231 can also be used to monitor parameters such as battery capacity, battery cycle times, and battery health status (leakage, impedance).
  • the power management module 231 may also be provided in the processor 210.
  • the power management module 231 and the charging management module 230 may also be provided in the same device.
  • the electronic device 200 implements a display function through a GPU, a display screen 250, an application processor, and the like.
  • the GPU is an image processing microprocessor, which is connected to the display screen 250 and the application processor.
  • the GPU is used to perform mathematical and geometric calculations for graphics rendering.
  • the processor 210 may include one or more GPUs that execute program instructions to generate or change display information.
  • the display screen 250 is used to display images, videos, and the like. Exemplarily, the display screen 250 may be used to display a guide interface for guiding the user to move the electronic device.
  • the display screen 250 is the aforementioned folding screen (such as a flexible folding screen or a multi-screen folding screen).
  • the display screen 250 includes a display panel.
  • the display panel can adopt liquid crystal display (LCD), organic light-emitting diode (OLED), active matrix organic light-emitting diode or active-matrix organic light-emitting diode (active-matrix organic light-emitting diode). emitting diode, AMOLED, flexible light-emitting diode (FLED), Miniled, MicroLed, Micro-oLed, quantum dot light-emitting diode (QLED), etc.
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • active matrix organic light-emitting diode active-matrix organic light-emitting diode
  • the sensor module 240 may include a Hall sensor.
  • the Hall sensor can use the Hall effect to determine the magnetic field strength at a certain point in the magnetic field.
  • the Hall sensor can be set on the charging coil 220 of the electronic device 200.
  • the Hall sensor can determine that the charging coil on the charging device generates
  • the magnetic field is the intensity of the magnetic field at the location where the Hall sensor is set.
  • multiple Hall sensors may be provided at different positions of the charging coil 220 of the electronic device 200.
  • the sensor module 240 may include other sensors, such as a pressure sensor, a gyroscope sensor, an air pressure sensor, an infrared sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, and bone conduction Sensors, etc.
  • sensors such as a pressure sensor, a gyroscope sensor, an air pressure sensor, an infrared sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, and bone conduction Sensors, etc.
  • the gyroscope sensor can be used to determine the movement posture of the electronic device 200.
  • the angular velocity of the electronic device 200 around three axes ie, x, y, and z axes
  • the gyroscope sensor can be used for shooting anti-shake.
  • the gyroscope sensor detects the jitter angle of the electronic device 200, and calculates the distance that the lens module needs to compensate according to the angle, so that the lens can offset the jitter of the electronic device 200 through a reverse movement to achieve anti-shake.
  • the gyroscope sensor can also be used for navigation and somatosensory game scenes.
  • the electronic device 200 can use a magnetic sensor to detect the opening and closing of the flip holster.
  • the electronic device 200 when the electronic device 200 is a flip machine, the electronic device 200 can detect the opening and closing of the flip according to the magnetic sensor. Furthermore, according to the detected opening and closing state of the holster or the opening and closing state of the flip cover, features such as automatic unlocking of the flip cover are set.
  • the acceleration sensor can detect the magnitude of the acceleration of the electronic device 200 in various directions (generally three axes). When the electronic device 200 is stationary, the magnitude and direction of gravity can be detected. It can also be used to identify the posture of electronic devices, and apply to applications such as horizontal and vertical screen switching, pedometers and so on. It should be noted that, in the embodiment of the present application, the display screen 250 of the electronic device 200 can be folded to form multiple screens. Each screen may include an acceleration sensor for measuring the orientation of the corresponding screen (that is, the direction vector of the orientation).
  • the pressure sensor is used to sense the pressure signal and can convert the pressure signal into an electrical signal.
  • the pressure sensor may be provided on the display screen 250.
  • the capacitive pressure sensor may include at least two parallel plates with conductive material. When a force is applied to the pressure sensor, the capacitance between the electrodes changes.
  • the electronic device 200 determines the intensity of the pressure according to the change in capacitance.
  • the electronic device 200 detects the intensity of the touch operation according to the pressure sensor.
  • the electronic device 200 may also calculate the touched position according to the detection signal of the pressure sensor.
  • touch operations that act on the same touch position but have different touch operation strengths may correspond to different operation instructions. For example, when a touch operation whose intensity of the touch operation is less than the first pressure threshold is applied to the short message application icon, an instruction to view the short message is executed. When a touch operation with a touch operation intensity greater than or equal to the first pressure threshold acts on the short message application icon, an instruction to create a new short message is executed.
  • the air pressure sensor is used to measure air pressure.
  • the electronic device 200 calculates the altitude based on the air pressure value measured by the air pressure sensor to assist positioning and navigation.
  • the electronic device 200 can measure the distance by infrared or laser. In some embodiments, when shooting a scene, the electronic device 200 may use a distance sensor to measure the distance to achieve fast focusing.
  • the proximity light sensor may include, for example, a light emitting diode (LED) and a light detector, such as a photodiode.
  • the light emitting diode may be an infrared light emitting diode.
  • the electronic device 200 emits infrared light to the outside through the light emitting diode.
  • the electronic device 200 uses a photodiode to detect infrared reflected light from nearby objects. When sufficient reflected light is detected, it can be determined that there is an object near the electronic device 200. When insufficient reflected light is detected, the electronic device 200 may determine that there is no object near the electronic device 200.
  • the electronic device 200 can use the proximity light sensor to detect that the user holds the electronic device 200 close to the ear to talk, so as to automatically turn off the display screen to save power.
  • the proximity light sensor can also be used in leather case mode, and the pocket mode will automatically unlock and lock the screen.
  • the ambient light sensor is used to sense the brightness of the ambient light.
  • the electronic device 200 can adaptively adjust the brightness of the display screen 250 according to the perceived brightness of the ambient light.
  • the ambient light sensor can also be used to automatically adjust the white balance when taking pictures.
  • the ambient light sensor can also cooperate with the proximity light sensor to detect whether the electronic device 200 is in the pocket to prevent accidental touch.
  • the fingerprint sensor is used to collect fingerprints.
  • the electronic device 200 can use the collected fingerprint characteristics to realize fingerprint unlocking, access application locks, fingerprint photographs, fingerprint answering calls, and so on.
  • the temperature sensor is used to detect temperature.
  • the electronic device 200 uses the temperature detected by the temperature sensor to execute the temperature processing strategy. For example, when the temperature reported by the temperature sensor exceeds a threshold value, the electronic device 200 performs a reduction in the performance of a processor located near the temperature sensor, so as to reduce power consumption and implement thermal protection.
  • the electronic device 200 when the temperature is lower than another threshold, the electronic device 200 heats the battery 232 to avoid abnormal shutdown of the electronic device 200 due to low temperature.
  • the electronic device 200 boosts the output voltage of the battery 232 to avoid abnormal shutdown caused by low temperature.
  • the touch sensor also called “touch panel”.
  • the touch sensor may be provided on the display screen 250, and the touch screen is composed of the touch sensor and the display screen 250, which is also called a “touch screen”.
  • the touch sensor is used to detect touch operations acting on or near it.
  • the touch sensor can pass the detected touch operation to the application processor to determine the type of touch event.
  • the visual output related to the touch operation can be provided through the display screen 250.
  • the touch sensor may also be disposed on the surface of the electronic device 200, which is different from the position of the display screen 250.
  • Bone conduction sensors can acquire vibration signals.
  • the bone conduction sensor can obtain the vibration signal of the vibrating bone mass of the human voice.
  • the bone conduction sensor can also contact the human pulse and receive the blood pressure pulse signal.
  • the bone conduction sensor may also be provided in the earphone, combined with the bone conduction earphone.
  • the audio module can analyze the voice signal based on the vibration signal of the vibrating bone block of the voice obtained by the bone conduction sensor to realize the voice function.
  • the application processor can analyze the heart rate information based on the blood pressure beating signal obtained by the bone conduction sensor to realize the heart rate detection function.
  • the wireless communication function of the electronic device 200 can be realized by the antenna 1, the antenna 2, the mobile communication module, the wireless communication module, the modem processor, and the baseband processor.
  • the antenna 1 and the antenna 2 are used to transmit and receive electromagnetic wave signals.
  • Each antenna in the electronic device 200 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization.
  • Antenna 1 can be multiplexed as a diversity antenna of a wireless local area network.
  • the antenna can be used in combination with a tuning switch.
  • the mobile communication module can provide a wireless communication solution including 2G/3G/4G/5G, etc., which is applied to the electronic device 200.
  • the mobile communication module may include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc.
  • the mobile communication module can receive electromagnetic waves by the antenna 1, and perform processing such as filtering and amplifying the received electromagnetic waves, and then transmitting them to the modem processor for demodulation.
  • the mobile communication module can also amplify the signal modulated by the modem processor, and convert it into electromagnetic waves to radiate through the antenna 1.
  • at least part of the functional modules of the mobile communication module may be provided in the processor 210.
  • at least part of the functional modules of the mobile communication module and at least part of the modules of the processor 210 may be provided in the same device.
  • the modem processor may include a modulator and a demodulator.
  • the modulator is used to modulate the low frequency baseband signal to be sent into a medium and high frequency signal.
  • the demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal. Then the demodulator transmits the demodulated low-frequency baseband signal to the baseband processor for processing. After the low-frequency baseband signal is processed by the baseband processor, it is passed to the application processor.
  • the application processor outputs sound signals through audio equipment (not limited to speakers, receivers, etc.), or displays images or videos through the display screen 250.
  • the modem processor may be an independent device. In other embodiments, the modem processor may be independent of the processor 210 and be provided in the same device as the mobile communication module or other functional modules.
  • the wireless communication module can provide applications on the electronic device 200 including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), and global navigation satellite systems. (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions.
  • WLAN wireless local area networks
  • BT Bluetooth
  • GNSS global navigation satellite system
  • frequency modulation frequency modulation, FM
  • NFC near field communication technology
  • infrared technology infrared, IR
  • the wireless communication module may be one or more devices integrating at least one communication processing module.
  • the wireless communication module receives electromagnetic waves via the antenna 2, frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 210.
  • the wireless communication module can also receive the signal to be sent from the processor 210, perform frequency modulation, amplify, and convert it into electromagnetic waves through the antenna 2 and radiate it out
  • the antenna 1 of the electronic device 200 is coupled with the mobile communication module, and the antenna 2 is coupled with the wireless communication module, so that the electronic device 200 can communicate with the network and other devices through wireless communication technology.
  • the wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), broadband Code division multiple access (wideband code division multiple access, WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC , FM, and/or IR technology, etc.
  • the GNSS may include global positioning system (GPS), global navigation satellite system (GLONASS), Beidou navigation satellite system (BDS), quasi-zenith satellite system (quasi -zenith satellite system, QZSS) and/or satellite-based augmentation systems (SBAS).
  • GPS global positioning system
  • GLONASS global navigation satellite system
  • BDS Beidou navigation satellite system
  • QZSS quasi-zenith satellite system
  • SBAS satellite-based augmentation systems
  • the electronic device 200 can implement a shooting function through an ISP, a camera, a video codec, a GPU, a display screen 250, and an application processor.
  • ISP is used to process the parameters feedback from the camera. For example, when taking a picture, the shutter is opened, the light is transmitted to the photosensitive element of the camera through the lens, the light signal is converted into an electrical signal, and the photosensitive element of the camera transmits the electrical signal to the ISP for processing and is converted into an image visible to the naked eye.
  • ISP can also optimize the image noise, brightness, and skin color. ISP can also optimize the exposure, color temperature and other parameters of the shooting scene. In some embodiments, the ISP can be set in the camera.
  • the camera is used to capture still images or video.
  • the object generates an optical image through the lens and is projected to the photosensitive element.
  • the photosensitive element may be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor.
  • CMOS complementary metal-oxide-semiconductor
  • the photosensitive element converts the optical signal into an electrical signal, and then transfers the electrical signal to the ISP to convert it into a digital image signal.
  • ISP outputs digital image signals to DSP for processing.
  • DSP converts digital image signals into standard RGB, YUV and other formats of image signals.
  • the electronic device 200 may include 1 or N cameras, and N is a positive integer greater than 1.
  • Digital signal processors are used to process digital signals. In addition to digital image signals, they can also process other digital signals. For example, when the electronic device 200 selects a frequency point, the digital signal processor is used to perform Fourier transform on the energy of the frequency point.
  • Video codecs are used to compress or decompress digital video.
  • the electronic device 200 may support one or more video codecs. In this way, the electronic device 200 can play or record videos in multiple encoding formats, such as: moving picture experts group (MPEG) 1, MPEG2, MPEG3, MPEG4, and so on.
  • MPEG moving picture experts group
  • MPEG2 MPEG2, MPEG3, MPEG4, and so on.
  • NPU is a neural-network (NN) computing processor.
  • NN neural-network
  • applications such as intelligent cognition of the electronic device 200 can be realized, such as image recognition, face recognition, voice recognition, text understanding, and so on.
  • the external memory interface can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device 200.
  • the external memory card communicates with the processor 210 through an external memory interface to realize the parameter storage function. For example, save music, video and other files in an external memory card.
  • the internal memory may be used to store computer executable program code, the executable program code including instructions.
  • the processor 210 executes various functional applications and parameter processing of the electronic device 200 by running instructions stored in the internal memory. For example, in the embodiment of the present application, the processor 210 can determine the displacement deviation and the displacement direction of the charging coil 220 relative to the charging coil on the charging device by executing instructions stored in the internal memory. The direction prompts the user to move the electronic device 200.
  • the internal memory can include a program storage area and a parameter storage area. Among them, the storage program area can store an operating system, at least one application program (such as a sound playback function, an image playback function, etc.) required by at least one function.
  • the parameter storage area can store parameters (such as audio parameters, phone book, etc.) created during the use of the electronic device 200.
  • the internal memory 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, universal flash storage (UFS), and the like.
  • the electronic device 200 may implement audio functions through an audio module, a speaker, a receiver, a microphone, a headphone interface, and an application processor. For example, music playback, recording, etc.
  • the audio module is used to convert digital audio information into analog audio signal output, and also used to convert analog audio input into digital audio signal.
  • the audio module can also be used to encode and decode audio signals.
  • the audio module may be provided in the processor 210, or part of the functional modules of the audio module may be provided in the processor 210.
  • Loudspeakers also called “speakers” are used to convert audio electrical signals into sound signals.
  • the electronic device 200 can listen to music through a speaker, or listen to a hands-free call.
  • the receiver also known as the "handset” is used to convert audio electrical signals into sound signals. When the electronic device 200 answers a call or voice message, it can receive the voice by bringing the receiver close to the human ear.
  • Microphone also known as “microphone” or “microphone” is used to convert sound signals into electrical signals.
  • the user can make a sound by approaching the microphone with a human mouth, and input a sound signal into the microphone.
  • the electronic device 200 may be provided with at least one microphone.
  • the electronic device 200 may be provided with two microphones, which can implement noise reduction functions in addition to collecting sound signals.
  • the electronic device 200 may also be equipped with three, four or more microphones to collect sound signals, reduce noise, identify sound sources, and realize directional recording functions.
  • the headphone jack is used to connect wired headphones.
  • the earphone interface can be a USB interface, or a 3.5mm open mobile terminal platform (OMTP) standard interface, or a cellular telecommunications industry association of the USA (CTIA) standard interface.
  • OMTP open mobile terminal platform
  • CTIA cellular telecommunications industry association of the USA
  • Buttons include power-on button, volume button and so on.
  • the keys can be mechanical keys. It can also be a touch button.
  • the electronic device 200 may receive key input, and generate key signal input related to user settings and function control of the electronic device 200.
  • the motor can produce vibration prompts.
  • the motor can be used for incoming call vibrating reminders, and it can also be used for touch vibration feedback.
  • touch operations that act on different applications can correspond to different vibration feedback effects.
  • Acting on touch operations in different areas of the display screen 250 the motors can also correspond to different vibration feedback effects.
  • Different application scenarios for example: time reminding, receiving information, alarm clock, games, etc.
  • the touch vibration feedback effect can also support customization.
  • the indicator can be an indicator light, which can be used to indicate the charging status, power change, and can also be used to indicate messages, missed calls, notifications, etc.
  • the SIM card interface is used to connect to the SIM card.
  • the SIM card can be inserted into the SIM card interface or pulled out from the SIM card interface to achieve contact and separation with the electronic device 200.
  • the electronic device 200 may support 1 or N SIM card interfaces, and N is a positive integer greater than 1.
  • the SIM card interface can support Nano SIM card, Micro SIM card, SIM card, etc.
  • the same SIM card interface can insert multiple cards at the same time. The types of the multiple cards can be the same or different.
  • the SIM card interface can also be compatible with different types of SIM cards.
  • the SIM card interface can also be compatible with external memory cards.
  • the electronic device 200 interacts with the network through the SIM card to realize functions such as call and parameter communication.
  • the electronic device 200 adopts an eSIM, that is, an embedded SIM card.
  • the eSIM card can be embedded in the electronic device 200 and cannot be separated from the electronic device 200.
  • the wireless charging methods in the following embodiments can all be implemented in the electronic device 200 having the above-mentioned hardware structure.
  • FIG. 3 is a schematic diagram of the composition of a charging device 300 provided by an embodiment of this application.
  • the charging device 300 may include a power interface 310, a processing module 320 and a charging coil 330.
  • the power interface 310 is used to connect to a power source
  • the processing module 320 is used to process the current connected through the power interface 310 to generate a stable magnetic field through the charging coil 330.
  • the charging electronic device performs wireless charging.
  • the charging device 300 can wirelessly charge the electronic device 200 shown in FIG. 2. As shown in FIG.
  • the charging device 300 when the charging device 300 is powered on and current flows through the charging coil 330 in the charging device 300, a magnetic field is generated around the charging coil 330.
  • other unpowered coils such as the charging coil 220 in the electronic device 200
  • an induced current will be generated on the charging coil 220.
  • the electronic device 200 can use the induced current on the charging coil 220 to charge the battery 232, thereby realizing the wireless charging of the electronic device 200 by the charging device 300.
  • the maximum power transmission distance of the wireless charging can reach about 10 cm.
  • the involved charging device may be the charging device 300 shown in FIG. 3, such as a charging device, etc., or it may be a device that supports wireless charging of other devices.
  • 2 shows the composition of the electronic device 200, such as a mobile phone, a tablet computer and so on.
  • it can also be other charging devices that can wirelessly charge other devices.
  • the embodiments of the application are not limited here.
  • FIG. 5 is a schematic flowchart of a wireless charging method provided by an embodiment of this application.
  • the charging coil in the electronic device is referred to as the power receiving coil
  • the charging coil in the charging device is referred to as the power transmitting coil for exemplary description.
  • the power receiving coil can be the first charging coil in this application
  • the power transmitting coil can be the second charging coil in this application.
  • the method may include S501-S505.
  • the electronic device determines the signal strength of the power receiving coil, and the signal strength is used to characterize the generation of the power receiving coil in the power transmitting coil.
  • the magnetic field strength of the magnetic field is used to characterize the generation of the power receiving coil in the power transmitting coil.
  • the power transmission coil of the charging device When the power transmission coil of the charging device is connected to the power source, the power transmission coil will generate a magnetic field centered on the power transmission coil as shown in FIG. 6.
  • the magnetic field generated by the power transmission coil is uniform in all directions. That is, the intensity of the magnetic field from the points at the same distance from the center of the power transmission coil is the same, and the intensity of the magnetic field radiating outward along the center of the power transmission coil gradually decreases.
  • the magnetic field strength of each dot on the dashed circle is the same. The farther away from the center of the power transmission coil, the weaker the magnetic field strength.
  • the power receiving coil enters the magnetic field.
  • the charging device provided with the power transmitting coil can be used to charge the electronic device through the power receiving coil.
  • an induced current will be generated on the power receiving coil.
  • the induced current has a corresponding relationship with the magnetic field strength of the position in the magnetic field where the power receiving coil is currently located, that is, the induced current has a corresponding relationship with the signal strength of the power receiving coil. Therefore, the electronic device can determine the signal strength of the power receiving coil at this time according to the magnitude of the induced current.
  • the electronic device determines the displacement deviation of the power receiving coil relative to the power transmitting coil according to the signal strength.
  • the electronic device can determine the displacement deviation of the power receiving coil relative to the power transmitting coil according to the signal strength.
  • the electronic device may determine the displacement deviation according to the signal strength and the mapping relationship obtained in S501, and the mapping relationship may include the corresponding relationship between the signal strength and the displacement deviation.
  • mapping relationship can be obtained in the following manner: under different displacement deviations, the signal strength of the power receiving coil is measured multiple times to obtain the magnitude range of the signal strength under the displacement deviation. After repeated measurements, the corresponding relationship between the stable signal intensity range and the displacement deviation is obtained.
  • mapping relationship between different signal intensity ranges and displacement deviations can be obtained.
  • the mapping relationship may be preset in the electronic device when the electronic device leaves the factory. For example, the mapping relationship can be as shown in Table 1.
  • Signal strength range Alignment information and displacement deviation (80,100) Accurate alignment (60,80) There is deviation in the alignment, the displacement deviation is x mm (40,60) There is deviation in the alignment, the displacement deviation is 2x mm (20,40) There is deviation in the alignment, the displacement deviation is 3x mm (0,20) There is deviation in the alignment, the displacement deviation is 4x mm 0 no
  • the electronic device determines that the signal strength of the power receiving coil is within the range of (80,100), it determines that the alignment of the two coils is accurate, and there is no need to adjust the position; when the signal strength of the power receiving coil is within the range of (60,80], it is determined The alignment of the two coils is deviated, and the displacement deviation is 10 mm; when the signal strength of the receiving coil is within the range of (40, 60), it is determined that the alignment of the two coils is deviated, and the displacement deviation is 20 mm; When the signal strength of the coil is within the range of (20,40), it is determined that the alignment of the two coils is deviated, and the displacement deviation is 30 mm; when the signal strength of the receiving coil is within the range of (0,20], it is determined that the two coils are within the range of (0,20). The alignment of each coil has a deviation, and the displacement deviation is 40 mm. When the electronic device determines that the signal strength of the power receiving coil is 0, the charging device does not charge the electronic device
  • the electronic device can determine whether there is a deviation in the alignment of the power receiving coil relative to the power transmitting coil of the charging device according to the signal strength of the power receiving coil and the mapping relationship. If there is a deviation in the alignment, it can also determine whether the power receiving coil is relative to the power transmitting coil. The specific value of the displacement deviation of the coil.
  • S503 The electronic device obtains the magnetic field intensity at N positions on the power receiving coil, where N is an integer greater than or equal to 3.
  • the electronic device can be equipped with Hall sensors on the power receiving coil or at N locations around the power receiving coil to obtain the magnetic field strength of the N locations on the power receiving coil in the magnetic field, which is the magnetic field generated by the power transmitting coil.
  • the Hall sensor set on the power receiving coil as an example.
  • the electronic device can determine the magnetic field intensity at P1 as B1, the magnetic field intensity at P2 as B2, and the magnetic field intensity at P3 as B3 through these three Hall sensors at different positions.
  • Hall sensors can be set in 4 different positions (such as P1, P2, P3, and P4) on the power receiving coil of the electronic device.
  • the electronic device can determine the magnetic field intensity at P1 as B1, the magnetic field intensity at P2 as B2, the magnetic field intensity at P3 as B3, and the magnetic field intensity at P4 as B4 through the Hall sensors set at these 4 different positions. .
  • the electronic device determines the displacement direction of the power receiving coil relative to the power transmitting coil according to the magnetic field strength at the N positions on the power receiving coil.
  • the relative positions of the power receiving coil and the power transmitting coil are different, so different positions on the power receiving coil have different magnetic field strengths in the magnetic field generated by the power transmitting coil. Therefore, it is possible to determine the relative position of the two coils by determining the magnetic field strength of multiple different positions on the power receiving coil, or to determine the displacement direction of the power receiving coil relative to the power transmitting coil.
  • the electronic device may determine the displacement direction of the power receiving coil relative to the power transmitting coil according to the magnitude relationship of the magnetic field strength at N positions on the power receiving coil.
  • the displacement direction is the direction in which the geometric center of the power receiving coil points to the position determined according to the magnitude relationship of the above-mentioned magnetic field strength.
  • the position may be the position far away from the position where the magnetic field strength is the smallest among the N positions and close to the position where the magnetic field strength is the largest among the N positions.
  • the power receiving coil is in the magnetic field generated by the power transmitting coil
  • the electronic device determines that the magnetic field strength of the first point is the smallest according to the magnetic field strength of at least 3 points on the power receiving coil
  • the second point The maximum magnetic field strength indicates that the power transmitting coil is located at the lower left of the power receiving coil, and the electronic device can determine that the displacement direction of the power receiving coil relative to the power transmitting coil is along the arrow direction as shown in FIG. 9.
  • N positions may be 3 positions, 4 positions, or more positions.
  • the electronic device can determine the displacement direction according to the magnetic field strengths of three different positions on the power receiving coil.
  • the power receiving coil can be acquired by the electronic device by setting the Hall sensors at 3 different positions (eg, the first position P1, the second position P2, and the third position P3) on the power receiving coil
  • the power transmitting coil may be in the position of the first area of the power receiving coil.
  • the first area is composed of P2, P3 And P0.
  • the electronic device can determine that the displacement direction is the direction from the geometric center P0 of the power receiving coil to the first area.
  • the power transmitting coil may be in the second region of the power receiving coil.
  • the second region is composed of P1, P3 And P0. Then the electronic device can determine that the displacement direction is the direction from the geometric center P0 of the power receiving coil to the second area.
  • the power transmitting coil may be in the position of the third region of the power receiving coil.
  • the third region is composed of P2, P1 And P0. Then the electronic device can determine that the displacement direction is the direction from the geometric center P0 of the power receiving coil to the third area.
  • the power receiving coil is moved to move the power receiving coil to the third area, the alignment of the power receiving coil and the power transmitting coil will become accurate, and the charging speed will be improved accordingly.
  • the specific direction of the displacement direction may be any position in the above-mentioned area.
  • the specific direction of the displacement direction can be closer to P2 or closer to P3.
  • the specific direction of the displacement direction can be closer to P2, or closer to P1.
  • the strength of the magnetic field at the position P3 is the smallest, the specific direction of the displacement direction can be closer to P1 or closer to P3.
  • the displacement direction can point to a position closer to P2 in the first area, and vice versa, if B2 is less than B3, then the displacement direction can point to closer to the first area The location of P3.
  • the magnetic field intensity at the position P2 is the smallest, if B1 is greater than B3, then the displacement direction can point to a position closer to P1 in the second area.
  • the displacement direction can point to a position closer to the second area. Close to the location of P3.
  • the magnetic field intensity at the position P3 is the smallest
  • B1 is greater than B2
  • the displacement direction can point to a position closer to P1 in the third area.
  • B1 is less than B2
  • the displacement direction can point to a position closer to P2 in the third area. position.
  • the electronic device can obtain the magnetic field strength of the four different positions on the power receiving coil by setting Hall sensors at four different positions on the power receiving coil, thereby determining the power receiving coil relative to the power transmitting coil. The direction of displacement.
  • Hall sensors can be arranged at 4 different positions on the power receiving coil (for example, the first position P1, the second position P2, the third position P3, and the fourth position P4) to make The electronic device obtains the first magnetic field strength B1 of the first position P1 on the power receiving coil, the second magnetic field strength B2 of the second position P2, the third magnetic field strength B3 of the third position P3, and the fourth magnetic field strength B4 of the fourth position P4 .
  • the positional relationship of P1, P2, P3, and P4 take the arrangement of P1, P2, P3, and P4 in the counterclockwise direction as an example.
  • the electronic device can determine that the displacement direction is the direction from the geometric center P0 of the power receiving coil to the area A.
  • Area A is the area formed by P1, P0, and the midpoint of the line connecting P1 and P2.
  • the electronic device can determine that the displacement direction is the direction from the geometric center P0 of the power receiving coil to the area B.
  • Area B is the area formed by P2, P0, and the midpoint of the line connecting P1 and P2.
  • the electronic device can determine that the displacement direction is the direction from the geometric center P0 of the power receiving coil to the area C.
  • Area C is the area formed by the midpoint of the line connecting P2, P0, P3 and P2.
  • the electronic device can determine that the displacement direction is the direction from the geometric center P0 of the power receiving coil to the area D.
  • Area D is the area formed by the midpoint of the line connecting P3, P0, P3 and P2.
  • the electronic device can determine that the displacement direction is the direction from the geometric center P0 of the power receiving coil to the area E.
  • Area E is the area formed by P3, P0, and the midpoint of the line connecting P3 and P4.
  • the electronic device can determine that the displacement direction is the direction from the geometric center P0 of the power receiving coil to the area F.
  • Area F is the area formed by the midpoint of the line connecting P4, P0, P3 and P4.
  • the electronic device can determine that the displacement direction is the direction from the geometric center P0 of the power receiving coil to the area G.
  • Area G is the area formed by the midpoint of the line connecting P4, P0, and P1 and P4.
  • the electronic device can determine that the displacement direction is the direction from the geometric center P0 of the power receiving coil to the area H.
  • Area H is the area formed by the midpoint of the line connecting P1, P0, and P1 and P4.
  • the position where the Hall sensor is arranged on the power receiving coil can be selected arbitrarily, or can be selected symmetrically and uniformly.
  • On the power receiving coil take the geometric center P0 of the coil as the origin, and select four points with the same distance from P0 in the east, south, west, and north directions of the origin: P1, P2, P3, and P4. Set up Hall sensors at the positions of these 4 points. In this way, the electronic device can obtain the magnetic field strength of these four points, and then determine the relative position of the power transmitting coil and the power receiving coil in the coordinate system as shown in FIG. 12.
  • the magnetic field strength at P1 is Be
  • the magnetic field at P2 is Bs
  • the magnetic field at P3 is Bw
  • the magnetic field at P4 is Bn
  • the electronic device can determine that the power transmission coil is in The direction of the true east of the power receiving coil, therefore, the electronic device can determine the direction of displacement is from the geometric center P0 of the power receiving coil to the true east direction.
  • the electronic device It can be determined that the power transmitting coil is in the positive northeast direction of the power receiving coil (the direction of 45° north east). Therefore, the electronic device can determine that the displacement direction is from the geometric center P0 of the power receiving coil to the positive northeast direction.
  • the electronic device can determine that the power transmitting coil is within 45° north east of the power receiving coil. Therefore, the electronic device can determine that the displacement direction is determined by the geometry of the power receiving coil.
  • the center P0 points to a direction within a range of 45° from east to north.
  • the electronic device can roughly confirm the eight different relative positions of the power transmitting coil with respect to the power receiving coil, and thereby determine the direction of the displacement direction.
  • N when N becomes larger, that is to say, when the magnetic field strength of more points on the power receiving coil is selected for comparison, the electronic device can use the power receiving coil
  • the area within the 360° range where the geometric center is the origin is divided into more areas, so that the determined displacement direction is more accurate.
  • the value of N can be set within an integer range greater than or equal to 3 according to the actual situation, that is, the displacement direction can be determined by setting more Hall sensors.
  • the embodiments of the application are not limited here.
  • the electronic device prompts the user to move the electronic device according to the displacement deviation and the displacement direction, the moving direction is the direction indicated by the displacement direction, and the moving distance is the distance indicated by the displacement deviation.
  • the electronic device may display the guidance interface according to the displacement deviation and the displacement direction.
  • the guide interface may include first prompt information and second prompt information.
  • the first prompt information is used to prompt the user to move the direction of the electronic device, and the direction is the direction indicated by the displacement direction.
  • the second prompt information is used to prompt the user to move the distance of the electronic device, and the distance is the distance indicated by the displacement deviation.
  • the electronic device may display the guidance interface as shown in (a) in FIG.
  • the guide interface may include first prompt information, such as an arrow 1601 with a direction shown in (a) in FIG. 16, which can be used to prompt the user to follow Move the electronic device in the direction of the arrow.
  • the guidance interface can also display the schematic diagrams of the positions of the two coils as the second prompt information.
  • the black filled circle can indicate the position of the power transmitting coil
  • the white filled circle can indicate the position of the power receiving coil.
  • the distance between the two circles on the guide interface can be used to mark the distance indicated by the displacement deviation.
  • the displacement deviation indicated by the interface shown in (a) in FIG. 16 is smaller than the displacement deviation indicated by the interface shown in (b) in FIG. 16.
  • the electronic device may display the guidance interface as shown in FIG. 17.
  • the specific description of the guide interface shown in FIG. 17 is similar to the description of the guide interface shown in FIG. 16, and will not be described in detail here.
  • the guide interface displayed by the electronic device may further include third prompt information.
  • the third prompt message may be "wireless charging (displacement deviation, please move the mobile phone as shown)" as shown in Figure 16 (a) to further inform the user It shows that the electronic device needs to be moved to increase the charging speed.
  • the electronic device can repeat the above S501-S505, so that the electronic device can determine the alignment of the two coils when the user moves the electronic device. .
  • the electronic device can refresh the displayed guide interface according to a certain period to display the displacement deviation and the displacement direction of the two coils at the current position.
  • the electronic device can also maintain the guidance interface displayed when the electronic device starts wireless charging until the electronic device is moved to the position where the two coils are aligned accurately.
  • the electronic device when the electronic device is moved by the user to a position where the two coils are accurately aligned, the electronic device may display a related interface to prompt the user that the two coils have been accurately aligned at the current position of the electronic device and can The fastest charging speed.
  • the electronic device determines that the two coils have been aligned, it can display the interface as shown in FIG. 18. Among them, since the two coils have been aligned, the displacement deviation is very small or zero. Therefore, the electronic device may display the word "Good” or other words or symbols to remind the user that there is no displacement deviation between the two coils.
  • the electronic device can also display two concentric circles to prompt the user that the geometric centers of the two coils currently overlap, that is, the two coils are aligned accurately.
  • the interface may also include prompt information for prompting the user that there is no displacement deviation of the two coils under the current position of the electronic device, or the displacement deviation is small, and there is no need to move.
  • the prompt message may be the words "wireless charging (displacement OK)" as shown in FIG. 18.
  • the electronic device determines that there is no alignment deviation between the power receiving coil and the power transmitting coil, for example, in S502, the electronic device determines that the signal strength of the power receiving coil is within the range of (80,100), the electronic device can display as shown in Figure 18.
  • the interface shown is used to remind the user that there is no large displacement deviation between the power receiving coil and the power transmitting coil under the current position of the electronic device, and can be charged with higher efficiency. Do not move the electronic device during the charging process.
  • the electronic device determines the displacement deviation of the two coils by determining the signal strength generated by the power receiving coil in the magnetic field generated by the power transmitting coil, so as to clarify the position of the power receiving coil when the power receiving coil is accurately aligned. distance.
  • the electronic device also determines the direction of displacement of the power receiving coil relative to the power transmitting coil by determining the magnetic field strength at different positions on the power receiving coil.
  • the electronic device can prompt the user to move the electronic device a corresponding distance along the displacement direction.
  • the rapid alignment of the power transmitting coil and the power receiving coil is realized, so as to achieve the purpose of improving the wireless charging speed.
  • the method provided in the embodiments of the present application does not have any limitation on the external dimensions of the electronic device. Therefore, for electronic devices of different sizes that can be wirelessly charged, the purpose of improving the wireless charging speed can be achieved through the above method.
  • an electronic device includes hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiment of the present application may divide the electronic device into functional modules according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software function modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 19 shows a schematic diagram of a possible logical composition of the electronic device involved in the above embodiment, and the electronic device is provided with a first charging coil, as shown in FIG. 19 ,
  • the electronic device may include: a determining unit 1901, an acquiring unit 1902, and a prompting unit 1903.
  • the determining unit 1901 is configured to determine the signal strength of the first charging coil when the charging device provided with the second charging coil is used to charge the electronic device through the first charging coil, and the signal strength is used to characterize the first charging coil.
  • the determining unit 1901 may be used to execute S501 as shown in FIG. 5.
  • the determining unit 1901 is further configured to determine the displacement deviation of the first charging coil relative to the second charging coil according to the signal strength. Exemplarily, the determining unit 1901 may also be used to perform S502 as shown in FIG. 5.
  • the obtaining unit 1902 is configured to obtain the magnetic field intensity at N positions on the first charging coil, where N is an integer greater than or equal to 3. Exemplarily, the obtaining unit 1902 may be used to execute S503 as shown in FIG. 5.
  • the determining unit 1901 is further configured to determine the displacement direction of the first charging coil relative to the second charging coil according to the magnetic field strength at N positions on the first charging coil. Exemplarily, the determining unit 1901 may also be used to perform S504 as shown in FIG. 5.
  • the prompt unit 1903 is configured to prompt the user to move the electronic device according to the displacement deviation and the displacement direction, the moving direction is the direction indicated by the displacement direction, and the moving distance is the distance indicated by the displacement deviation.
  • the prompt unit 1903 may be used to execute S505 as shown in FIG. 5.
  • the determining unit 1901 is specifically configured to determine the displacement direction of the first charging coil relative to the second charging coil according to the magnitude relationship of the magnetic field strength at N positions on the first charging coil.
  • the displacement direction is the direction from the geometric center of the first charging coil to the position away from the position with the smallest magnetic field strength among the N positions and close to the position with the largest magnetic field strength among the N positions.
  • the acquiring unit 1902 is specifically configured to acquire the first magnetic field strength B1 at the first position P1, the second magnetic field strength B2 at the second position P2, and the third magnetic field on the first charging coil.
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the first area, which is the area composed of P2, P3, and P0.
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the second area, which is the area composed of P1, P3, and P0.
  • B3 is less than B1 and B3 is less than B2, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the third area, which is the area composed of P1, P1, and P0.
  • Hall sensors are respectively provided at P1, P2, and P3 of the first charging coil.
  • the acquiring unit 1902 is specifically configured to acquire B1 through the hall sensor set at P1, acquire B2 through the hall sensor set at P2, and acquire B3 through the hall sensor set at P3.
  • the acquiring unit 1902 is specifically configured to acquire the first magnetic field strength B1 at the first position P1 on the first charging coil, the second magnetic field strength B2 at the second position P2, and the third The third magnetic field strength B3 at the position P3 and the fourth magnetic field strength B4 at the fourth position P4.
  • P1, P2, P3, and P4 are arranged in a counterclockwise direction on the first charging coil.
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area A, which is the area formed by the midpoint of the connection between P1, P0 and P1 and P2 .
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area B, which is the area formed by P2, P0, and the midpoint of the line between P1 and P2. If B2 is the largest and B3 is greater than B1, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area C, which is the area formed by the midpoint of the line connecting P2, P0, P3 and P2. If B3 is the largest and B2 is greater than B4, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area D, which is the area formed by the midpoint of the line connecting P3, P0, P3 and P2.
  • the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area E, which is the area formed by the midpoint of the line connecting P3, P0, P3 and P4. If B4 is the largest and B3 is greater than B1, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area F, which is the area formed by the midpoint of the line connecting P4, P0, P3 and P4. If B4 is the largest and B1 is greater than B3, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area G, which is the area formed by P4, P0, and the midpoint of the line connecting P1 and P4. If B1 is the largest and B4 is greater than B2, the displacement direction is specifically the direction from the geometric center P0 of the first charging coil to the area H, which is the area formed by the midpoint of the line connecting P1, P0, P1 and P4.
  • Hall sensors are respectively provided at P1, P2, P3, and P4 of the first charging coil.
  • the acquiring unit 1902 is specifically configured to acquire B1 through the hall sensor set at P1, acquire B2 through the hall sensor set at P2, acquire B3 through the hall sensor set at P3, and acquire B4 through the hall sensor set at P4.
  • the prompt unit 1903 is specifically configured to display a guide interface according to the displacement deviation and the displacement direction, and the guide interface includes the first prompt information and the second prompt information.
  • the first prompt information is used to prompt the user in the direction of moving the electronic device, and the direction prompted by the first prompt information is the direction indicated by the displacement direction.
  • the second prompt information is used to prompt the user of the distance to move the electronic device, and the distance prompted by the second prompt information is the distance indicated by the displacement deviation.
  • the determining unit 1901 is specifically configured to determine the signal strength according to the induced current on the first charging coil.
  • the determining unit 1901 is specifically configured to determine the displacement deviation according to the signal strength and the mapping relationship, and the mapping relationship includes the corresponding relationship between the signal strength and the displacement deviation.
  • the electronic device provided by the embodiment of the present application is used to perform the function of the electronic device in the above method, and therefore can achieve the same effect as the above communication method.
  • the functions of the determining unit 1901, obtaining unit 1902, and prompting unit 1903 in the embodiments of the present application can be implemented by independent hardware modules, or implemented by independent software modules. It can be implemented by a common hardware processing platform to execute program instructions.
  • An embodiment of the present application also provides an electronic device, which may include a first charging coil, a charging management module, a processor, and a memory. Among them, the first charging coil, the charging management module, the processor and the memory are coupled.
  • the memory may be used to store computer program code, and the computer program code includes computer instructions. When the computer instructions are executed by the electronic device, the electronic device can execute the wireless charging method as shown in FIG. 5.
  • the embodiment of the present application also provides a chip system, which is applied to an electronic device including a first charging coil; as shown in FIG. 20, the chip system includes at least one processor 2001 and at least one interface circuit 2002.
  • the processor 2001 and the interface circuit 2002 can be interconnected by wires.
  • the interface circuit 2002 may be used to receive signals from other devices (such as the memory of an electronic device).
  • the interface circuit 2002 may be used to send signals to other devices (such as the processor 2001 or the display screen of an electronic device).
  • the interface circuit 2002 can read an instruction stored in the memory, and send the instruction to the processor 2001.
  • the electronic device can execute the steps in the foregoing embodiments.
  • the chip system may also include other discrete devices, which are not specifically limited in the embodiment of the present application.
  • the functions or actions or operations or steps in the foregoing embodiments can be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • a software program When implemented using a software program, it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or include one or more data storage devices such as servers, data centers, etc. that can be integrated with the medium.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

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Abstract

一种无线充电方法及电子设备（200），涉及电子设备领域，能够提高无线充电线圈对位的准确度，提升无线充电速度。在使用设置有第二充电线圈（330）的充电设备（300）通过第一充电线圈（220）为电子设备（200）充电时，电子设备（200）确定第一充电线圈（220）的信号强度，并根据信号强度确定第一充电线圈（220）相对于第二充电线圈（330）的位移偏差；电子设备（200）获取第一充电线圈（220）上N个位置处的磁场强度，N为大于或等于3的整数；电子设备（200）根据第一充电线圈（220）上N个位置处的磁场强度，确定第一充电线圈（220）相对于第二充电线圈（330）的位移方向；电子设备（200）根据位移偏差和位移方向，提示用户移动电子设备（200），移动的方向为位移方向所指示的方向，移动的距离为位移偏差所指示的距离。

Description

一种无线充电方法及电子设备
本申请要求于2019年8月23日提交知识产权局、申请号为201910786606.5、申请名称为“一种无线充电方法及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电子设备领域，尤其涉及一种无线充电方法及电子设备。
背景技术
目前，无线充电技术被越来越广泛的应用于对电子设备的充电过程中。对于小功率无线充电而言(如对电子设备的充电)，无线充电可以基于电磁感应原理实现。示例性的，分别在充电设备和需要充电的电子设备中设置充电线圈，当两个充电线圈距离较近时，电子设备中的充电线圈处于充电设备中的充电线圈产生的磁场中，这样电子设备中的充电线圈上就会产生感应电流，将该感应电流输入电子设备，就实现了对电子设备的无线充电。其中，基于电磁感应的无线充电大多采用是无线充电联盟(Wireless Power Consortium，WPC)推出的Qi无线协议标准，其支持无线充电的距离为毫米级别。由于细微的位移偏差将直接影响无线充电效率，进而影响充电速度，因此，无线充电对充电线圈的对位要求非常严格。
另外，出于对充电线圈的保护以及外观的考虑，充电线圈一般被设置在电子设备内部，因此，无法直观的根据充电线圈的位置进行准确对位。由此也就无法保证无线充电过程中的充电速度。
为了解决无线充电过程中线圈的对位问题，可以在充电设备上设置定位结构。请参考图1，为现有技术中的一种具有定位结构的无线充电设备。用户在需要对电子设备进行无线充电时，将电子设备放入定位结构中，这样就能够保证电子设备的充电线圈与充电设备的充电线圈准确对位，以保证无线充电效率。然而，这种定位结构对电子设备的尺寸要求非常高，不同尺寸的电子设备无法共用同一个充电设备。对具有同样尺寸的电子设备而言，如果其内部的充电线圈位置设置不同，那么也不能共用同一个充电设备。
因此，就需要一种方案，能够提高无线充电线圈对位的准确度，以提升无线充电速度。
发明内容
本申请实施例提供一种无线充电方法及电子设备，能够提高无线充电线圈对位的准确度，以提升无线充电速度。
为达到上述目的，本申请实施例提供如下技术方案：
第一方面，本申请实施例提供一种无线充电方法，该方法可以应用于设置有第一充电线圈的电子设备。该方法可以包括：在使用设置有第二充电线圈的充电设备通过第一充电线圈为电子设备充电时，电子设备确定第一充电线圈的信号强度(signal strength)，信号强度用于表征第一充电线圈在第二充电线圈产生的磁场中的磁场强度。 电子设备根据信号强度确定第一充电线圈相对于第二充电线圈的位移偏差。电子设备获取第一充电线圈上N个位置处的磁场强度，N为大于或等于3的整数。电子设备根据第一充电线圈上N个位置处的磁场强度，确定第一充电线圈相对于第二充电线圈的位移方向。电子设备根据位移偏差和位移方向，提示用户移动电子设备，移动的方向为位移方向所指示的方向，移动的距离为位移偏差所指示的距离。
这样，电子设备在进行无线充电时，电子设备根据设置在电子设备上的第一充电线圈在磁场中的信号强度，可以确定当前位置下，第一充电线圈与充电设备的第二充电线圈的位移偏差。电子设备还可以根据在第一充电线圈上的至少3个位置的磁场强度，确定当前位置下，第一充电线圈与充电设备的第二充电线圈的位移方向。以便电子设备能够根据位移偏差和位移方向提示用户移动电子设备，使得电子设备的第一充电线圈与第二充电线圈对位更加准确，进而提升无线充电速度。
在一种可能的设计中，电子设备根据第一充电线圈上N个位置处的磁场强度，确定第一充电线圈相对于第二充电线圈的位移方向，包括：电子设备根据第一充电线圈上N个位置处的磁场强度的大小关系，确定第一充电线圈相对于第二充电线圈的位移方向。其中，位移方向是由第一充电线圈的几何中心指向远离N个位置中磁场强度最小的位置，且靠近N个位置中磁场强度最大的位置的方向。这样，电子设备就可以根据第一充电线圈上至少3个位置的磁场强度，确定出位移方向的大致指向。
在一种可能的设计中，当N为3时，电子设备获取第一充电线圈上N个位置处的磁场强度，包括：电子设备获取第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2和第三位置P3的第三磁场强度B3。其中，如果B1小于B2，且B1小于B3，则位移方向具体为由第一充电线圈的几何中心P0指向第一区域的方向，第一区域是由P2，P3和P0所构成的区域。如果B2小于B3，且B2小于B1，则位移方向具体为由第一充电线圈的几何中心P0指向第二区域的方向，第二区域是由P1，P3和P0所构成的区域。如果B3小于B1，且B3小于B2，则位移方向具体为由第一充电线圈的几何中心P0指向第三区域的方向，第三区域是由P1，P1和P0所构成的区域。这样，电子设备就可以根据第一充电线圈上3个位置的磁场强度的相对大小关系，确定出较为准确的位移方向的指向。
在一种可能的设计中，第一充电线圈的P1、P2和P3处分别设置有霍尔传感器。电子设备获取第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2和第三位置P3的第三磁场强度B3，包括：电子设备通过P1处设置的霍尔传感器获取B1，通过P2处设置的霍尔传感器获取B2，通过P3处设置的霍尔传感器获取B3。这样，电子设备就能够通过霍尔传感器获取第一充电线圈上3个不同位置的磁场强度。
在一种可能的设计中，当N为4时，电子设备获取第一充电线圈上N个位置处的磁场强度，包括：电子设备获取第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2，第三位置P3的第三磁场强度B3和第四位置P4的第四磁场强度B4。其中，P1、P2、P3和P4在第一充电线圈上沿逆时针方向排列。其中，如果B1最大，且B2大于B4，则位移方向具体为由第一充电线圈的几何中心P0指向区域A的方向，区域A是由P1、P0和P1与P2连线中点所构成的区域。如果B2最 大，且B1大于B3，则位移方向具体为由第一充电线圈的几何中心P0指向区域B的方向，区域B是由P2、P0和P1与P2连线中点所构成的区域。如果B2最大，且B3大于B1，则位移方向具体为由第一充电线圈的几何中心P0指向区域C的方向，区域C是由P2、P0和P3与P2连线中点所构成的区域。如果B3最大，且B2大于B4，则位移方向具体为由第一充电线圈的几何中心P0指向区域D的方向，区域D是由P3、P0和P3与P2连线中点所构成的区域。如果B3最大，且B4大于B2，则位移方向具体为由第一充电线圈的几何中心P0指向区域E的方向，区域E是由P3、P0和P3与P4连线中点所构成的区域。如果B4最大，且B3大于B1，则位移方向具体为由第一充电线圈的几何中心P0指向区域F的方向，区域F是由P4、P0和P3与P4连线中点所构成的区域。如果B4最大，且B1大于B3，则位移方向具体为由第一充电线圈的几何中心P0指向区域G的方向，区域G是由P4、P0和P1与P4连线中点所构成的区域。如果B1最大，且B4大于B2，则位移方向具体为由第一充电线圈的几何中心P0指向区域H的方向，区域H是由P1、P0和P1与P4连线中点所构成的区域。这样，电子设备就可以根据第一充电线圈上4个位置的磁场强度的相对大小关系，确定出更加准确的位移方向的指向。
在一种可能的设计中，第一充电线圈的P1、P2、P3和P4处分别设置有霍尔传感器。电子设备获取第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2，第三位置P3的第三磁场强度B3和第四位置P4的第四磁场强度B4，包括：电子设备通过P1处设置的霍尔传感器获取B1，通过P2处设置的霍尔传感器获取B2，通过P3处设置的霍尔传感器获取B3，通过P4处设置的霍尔传感器获取B4。这样，电子设备就能够通过霍尔传感器获取第一充电线圈上4个不同位置的磁场强度。
在一种可能的设计中，电子设备根据位移偏差和位移方向，提示用户移动电子设备，包括：电子设备根据位移偏差和位移方向，显示引导界面，引导界面包括第一提示信息和第二提示信息。其中，第一提示信息用于提示用户移动电子设备的方向，第一提示信息提示的方向是位移方向所指示的方向。第二提示信息用于提示用户移动电子设备的距离，第二提示信息提示的距离是位移偏差所指示的距离。这样，电子设备就可以根据位移方向和位移偏差准确地提示用户移动电子设备，使得电子设备的第一充电线圈与充电设备的第二充电线圈对位更加准确。
在一种可能的设计中，电子设备确定第一充电线圈的信号强度，包括：电子设备根据第一充电线圈上的感应电流确定信号强度。这样，电子设备就可以通过第一充电线圈上的感应电流的大小，确定在当前位置下，第一充电线圈在充电设备的第二充电线圈的磁场中的信号强度。
在一种可能的设计中，电子设备根据信号强度确定第一充电线圈相对于第二充电线圈的位移偏差，包括：电子设备根据信号强度和映射关系确定位移偏差，映射关系包括信号强度和位移偏差的对应关系。这样，电子设备就可以根据确定出的信号强度准确地确定出位移偏差。
第二方面，本申请提供一种电子设备，该电子设备设置有第一充电线圈。该电子设备包括确定单元，获取单元和提示单元。其中，确定单元，用于在使用设置有第二充电线圈的充电设备通过第一充电线圈为电子设备充电时，确定第一充电线圈的信号 强度signal strength，信号强度用于表征第一充电线圈在第二充电线圈产生的磁场中的磁场强度。根据信号强度确定第一充电线圈相对于第二充电线圈的位移偏差。获取单元，用于获取第一充电线圈上N个位置处的磁场强度，N为大于或等于3的整数。确定单元，还用于根据第一充电线圈上N个位置处的磁场强度，确定第一充电线圈相对于第二充电线圈的位移方向。提示单元，用于根据位移偏差和位移方向，提示用户移动电子设备，移动的方向为位移方向所指示的方向，移动的距离为位移偏差所指示的距离。
在一种可能的设计中，确定单元，用于根据第一充电线圈上N个位置处的磁场强度，确定第一充电线圈相对于第二充电线圈的位移方向，包括：确定单元，用于根据第一充电线圈上N个位置处的磁场强度的大小关系，确定第一充电线圈相对于第二充电线圈的位移方向。其中，位移方向是由第一充电线圈的几何中心指向远离N个位置中磁场强度最小的位置，且靠近N个位置中磁场强度最大的位置的方向。
在一种可能的设计中，当N为3时，获取单元，用于获取第一充电线圈上N个位置处的磁场强度，包括：获取单元，用于获取第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2和第三位置P3的第三磁场强度B3。其中，如果B1小于B2，且B1小于B3，则位移方向具体为由第一充电线圈的几何中心P0指向第一区域的方向，第一区域是由P2，P3和P0所构成的区域。如果B2小于B3，且B2小于B1，则位移方向具体为由第一充电线圈的几何中心P0指向第二区域的方向，第二区域是由P1，P3和P0所构成的区域。如果B3小于B1，且B3小于B2，则位移方向具体为由第一充电线圈的几何中心P0指向第三区域的方向，第三区域是由P1，P1和P0所构成的区域。
在一种可能的设计中，第一充电线圈的P1、P2和P3处分别设置有霍尔传感器。获取单元，用于获取第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2和第三位置P3的第三磁场强度B3，包括：获取单元，用于通过P1处设置的霍尔传感器获取B1，通过P2处设置的霍尔传感器获取B2，通过P3处设置的霍尔传感器获取B3。
在一种可能的设计中，当N为4时，获取单元，用于获取第一充电线圈上N个位置处的磁场强度，包括：获取单元，用于获取第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2，第三位置P3的第三磁场强度B3和第四位置P4的第四磁场强度B4。其中，P1、P2、P3和P4在第一充电线圈上沿逆时针方向排列。其中，如果B1最大，且B2大于B4，则位移方向具体为由第一充电线圈的几何中心P0指向区域A的方向，区域A是由P1、P0和P1与P2连线中点所构成的区域。如果B2最大，且B1大于B3，则位移方向具体为由第一充电线圈的几何中心P0指向区域B的方向，区域B是由P2、P0和P1与P2连线中点所构成的区域。如果B2最大，且B3大于B1，则位移方向具体为由第一充电线圈的几何中心P0指向区域C的方向，区域C是由P2、P0和P3与P2连线中点所构成的区域。如果B3最大，且B2大于B4，则位移方向具体为由第一充电线圈的几何中心P0指向区域D的方向，区域D是由P3、P0和P3与P2连线中点所构成的区域。如果B3最大，且B4大于B2，则位移方向具体为由第一充电线圈的几何中心P0指向区域E的方向，区域E是由P3、 P0和P3与P4连线中点所构成的区域。如果B4最大，且B3大于B1，则位移方向具体为由第一充电线圈的几何中心P0指向区域F的方向，区域F是由P4、P0和P3与P4连线中点所构成的区域。如果B4最大，且B1大于B3，则位移方向具体为由第一充电线圈的几何中心P0指向区域G的方向，区域G是由P4、P0和P1与P4连线中点所构成的区域。如果B1最大，且B4大于B2，则位移方向具体为由第一充电线圈的几何中心P0指向区域H的方向，区域H是由P1、P0和P1与P4连线中点所构成的区域。
在一种可能的设计中，第一充电线圈的P1、P2、P3和P4处分别设置有霍尔传感器。获取单元，用于获取第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2，第三位置P3的第三磁场强度B3和第四位置P4的第四磁场强度B4，包括：获取单元，用于通过P1处设置的霍尔传感器获取B1，通过P2处设置的霍尔传感器获取B2，通过P3处设置的霍尔传感器获取B3，通过P4处设置的霍尔传感器获取B4。
在一种可能的设计中，提示单元，用于根据位移偏差和位移方向，提示用户移动电子设备，包括：提示单元，用于根据位移偏差和位移方向，显示引导界面，引导界面包括第一提示信息和第二提示信息。其中，第一提示信息用于提示用户移动电子设备的方向，第一提示信息提示的方向是位移方向所指示的方向。第二提示信息用于提示用户移动电子设备的距离，第二提示信息提示的距离是位移偏差所指示的距离。
在一种可能的设计中，确定单元，用于确定第一充电线圈的信号强度，包括：确定单元，用于根据第一充电线圈上的感应电流确定信号强度。在一种可能的设计中，确定单元，用于根据信号强度确定第一充电线圈相对于第二充电线圈的位移偏差，包括：确定单元，用于根据信号强度和映射关系确定位移偏差，映射关系包括信号强度和位移偏差的对应关系。
第三方面，本申请提供一种电子设备。该电子设备包括：第一充电线圈，充电管理模块，处理器和存储器。处理器，第一充电线圈，充电管理模块和存储器耦合，存储器用于存储计算机程序代码，计算机程序代码包括计算机指令，当计算机指令被电子设备执行时，使得电子设备执行如第一方面以及第一方面各种可能的设计所述的无线充电方法。
第四方面，本申请提供一种计算机可读存储介质，该计算机可读存储介质可以包括：计算机软件指令。当计算机软件指令在电子设备中运行时，使得电子设备执行如第一方面以及第一方面各种可能的设计所述的无线充电方法。
第五方面，本申请提供一种计算机程序产品，当计算机程序产品在计算机上运行时，使得计算机执行如第一方面以及第一方面各种可能的设计所述的无线充电方法。
第六方面，本申请提供了一种芯片系统，该芯片系统包括处理器、通信接口，用于支持电子设备实现上述方面中所涉及的功能。在一种可能的设计中，芯片系统还包括存储器，存储器，用于保存电子设备必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包含芯片和其他分立器件。
第七方面，本申请提供一种无线充电系统，该无线充电系统可以包括设置有第一充电线圈的电子设备和设置有第二充电线圈的充电设备。该充电设备可以对电子设备 进行无线充电。在无线充电过程中，电子设备可以用于执行如第一方面以及第一方面各种可能的设计所述的无线充电方法。
可以理解地，上述提供的第二方面提供的电子设备及第二方面各种可能的设计、第三方面的电子设备、第四方面的计算机可读存储介质、第五方面的计算机程序产品、第六方面的芯片系统以及第七方面的无线充电系统均可以用于执行第一方面以及第一方面各种可能的设计所提供的无线充电方法，因此，其所能达到的有益效果可参考第一方面以及第一方面各种可能的设计所提供的方法中的有益效果，此处不再赘述。
附图说明
图1为现有技术提供的一种具有定位结构的无线充电设备的结构示意图；
图2为本申请实施例提供的一种电子设备的组成示意图；
图3为本申请实施例提供的一种充电设备的组成示意图；
图4为本申请实施例提供的一种无线充电的场景示意图；
图5为本申请实施例提供的一种无线充电方法的流程示意图；
图6为本申请实施例提供的一种送电线圈的磁场示意图；
图7为本申请实施例提供的一种磁场强度获取示意图；
图8为本申请实施例提供的另一种磁场强度获取示意图；
图9为本申请实施例提供的一种位移方向确定示意图；
图10为本申请实施例提供的另一种位移方向确定示意图；
图11为本申请实施例提供的另一种位移方向确定示意图；
图12为本申请实施例提供的另一种位移方向确定示意图；
图13为本申请实施例提供的一种受电线圈和送电线圈的相对位置示意图；
图14为本申请实施例提供的另一种受电线圈和送电线圈的相对位置示意图；
图15为本申请实施例提供的另一种受电线圈和送电线圈的相对位置示意图；
图16为本申请实施例提供的一种引导界面的示意图；
图17为本申请实施例提供的另一种引导界面的示意图；
图18为本申请实施例提供的另一种引导界面的示意图；
图19为本申请实施例提供的一种电子设备的逻辑组成示意图；
图20为本申请实施例提供的一种芯片系统的逻辑组成示意图。
具体实施方式
无线充电过程中，充电设备，如充电设备中的充电线圈与被充电的电子设备中的充电线圈的对位是否准确，对无线充电的速度影响非常明显。本申请实施例提供一种无线充电方法，通过确定电子设备中的充电线圈上的信号强度以及电子设备中的充电线圈上不同位置的磁场强度，确定电子设备中的充电线圈与充电设备中的充电线圈的位移偏差以及位移方向，进而据此提示用户移动电子设备，以便电子设备上的充电线圈与充电设备上的充电线圈准确对位，达到提升无线充电速度的目的。
以下结合附图对本申请实施例进行详细说明。
请参考图2，为本申请实施例提供的一种电子设备200的组成示意图。如图2所示，电子设备200可以包括处理器210，通用串行总线(universal serial bus，USB)接口，充电线圈220，充电管理模块230，电源管理模块231，电池232，传感器模块240， 天线1，天线2，移动通信模块，无线通信模块，外部存储器接口，内部存储器，音频模块，扬声器，受话器，麦克风，耳机接口，按键，马达，指示器，摄像头，显示屏250，以及用户标识模块(subscriber id entification module，SIM)卡接口等。
可以理解的是，本实施例示意的结构并不构成对电子设备200的具体限定。在另一些实施例中，电子设备200可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。图示的部件可以以硬件，软件或软件和硬件的组合实现。
处理器210可以包括一个或多个处理单元，例如：处理器210可以包括应用处理器(application processor，AP)，调制解调处理器，图形处理器(graphics processing unit，GPU)，图像信号处理器(image signal processor，ISP)，控制器，存储器，视频编解码器，数字信号处理器(digital signal processor，DSP)，基带处理器，和/或神经网络处理器(neural-network processing unit，NPU)等。其中，不同的处理单元可以是独立的器件，也可以集成在一个或多个处理器中。
控制器可以是电子设备200的神经中枢和指挥中心。控制器可以根据指令操作码和时序信号，产生操作控制信号，完成取指令和执行指令的控制。
处理器210中还可以设置存储器，用于存储指令和参数。在一些实施例中，处理器210中的存储器为高速缓冲存储器。该存储器可以保存处理器210刚用过或循环使用的指令或参数。如果处理器210需要再次使用该指令或参数，可从所述存储器中直接调用。避免了重复存取，减少了处理器210的等待时间，因而提高了系统的效率。
在一些实施例中，处理器210可以包括一个或多个接口。接口可以包括集成电路(inter-integrated circuit，I2C)接口，集成电路内置音频(inter-integrated circuit sound，I2S)接口，脉冲编码调制(pulse code modulation，PCM)接口，通用异步收发传输器(universal asynchronous receiver/transmitter，UART)接口，移动产业处理器接口(mobile industry processor interface，MIPI)，通用输入输出(general-purpose input/output，GPIO)接口，SIM接口，和/或USB接口等。
充电管理模块230用于从充电设备接收充电输入。其中，在本实施例中，充电设备是具有有线充电功能的无线充电设备。充电管理模块230可以通过电子设备200的充电线圈220接收无线充电输入。充电管理模块230为电池232充电的同时，还可以通过电源管理模块231为电子设备供电。
电源管理模块231用于连接电池232，充电管理模块230与处理器210。电源管理模块231接收电池232和/或充电管理模块230的输入，为处理器210，内部存储器，外部存储器，显示屏250，摄像头，和无线通信模块等供电。电源管理模块231还可以用于监测电池容量，电池循环次数，电池健康状态(漏电，阻抗)等参数。在其他一些实施例中，电源管理模块231也可以设置于处理器210中。在另一些实施例中，电源管理模块231和充电管理模块230也可以设置于同一个器件中。
电子设备200通过GPU，显示屏250，以及应用处理器等实现显示功能。GPU为图像处理的微处理器，连接显示屏250和应用处理器。GPU用于执行数学和几何计算，用于图形渲染。处理器210可包括一个或多个GPU，其执行程序指令以生成或改变显示信息。
显示屏250用于显示图像，视频等。示例性的，该显示屏250可以用于显示引导界面，用于引导用户对电子设备进行移动。该显示屏250是上述折叠屏(如柔性折叠屏或多屏折叠屏)。显示屏250包括显示面板。显示面板可以采用液晶显示屏(liquid crystal display，LCD)，有机发光二极管(organic light-emitting diode，OLED)，有源矩阵有机发光二极体或主动矩阵有机发光二极体(active-matrix organic light emitting diode，AMOLED)，柔性发光二极管(flex light-emitting diode，FLED)，Miniled，MicroLed，Micro-oLed，量子点发光二极管(quantum dot light emitting diodes，QLED)等。
传感器模块240可以包括霍尔传感器。霍尔传感器可以利用霍尔效应，确定磁场中某个点的磁场强度。示例性的，在本申请实施例中，可以将霍尔传感器设置在电子设备200的充电线圈220上，当电子设备200在进行无线充电时，霍尔传感器就可以确定充电设备上的充电线圈生成的磁场在该霍尔传感器设置的位置的磁场强度。在本申请实施例中，在电子设备200的充电线圈220的不同位置可以设置多个霍尔传感器。
传感器模块240可以包括其他传感器，如压力传感器，陀螺仪传感器，气压传感器，红外传感器，磁传感器，加速度传感器，距离传感器，接近光传感器，指纹传感器，温度传感器，触摸传感器，环境光传感器，骨传导传感器等。
其中，陀螺仪传感器可以用于确定电子设备200的运动姿态。在一些实施例中，可以通过陀螺仪传感器确定电子设备200围绕三个轴(即，x，y和z轴)的角速度。陀螺仪传感器可以用于拍摄防抖。示例性的，当按下快门，陀螺仪传感器检测电子设备200抖动的角度，根据角度计算出镜头模组需要补偿的距离，让镜头通过反向运动抵消电子设备200的抖动，实现防抖。陀螺仪传感器还可以用于导航，体感游戏场景。
电子设备200可以利用磁传感器检测翻盖皮套的开合。在一些实施例中，当电子设备200是翻盖机时，电子设备200可以根据磁传感器检测翻盖的开合。进而根据检测到的皮套的开合状态或翻盖的开合状态，设置翻盖自动解锁等特性。
加速度传感器可检测电子设备200在各个方向上(一般为三轴)加速度的大小。当电子设备200静止时可检测出重力的大小及方向。还可以用于识别电子设备姿态，应用于横竖屏切换，计步器等应用。需要注意的是，在本申请实施例中，电子设备200的显示屏250可折叠形成多个屏。每个屏中可以包括加速度传感器，用于测量对应屏的朝向(即朝向的方向向量)。
压力传感器用于感受压力信号，可以将压力信号转换成电信号。在一些实施例中，压力传感器可以设置于显示屏250。压力传感器的种类很多，如电阻式压力传感器，电感式压力传感器，电容式压力传感器等。电容式压力传感器可以是包括至少两个具有导电材料的平行板。当有力作用于压力传感器，电极之间的电容改变。电子设备200根据电容的变化确定压力的强度。当有触摸操作作用于显示屏250，电子设备200根据压力传感器检测触摸操作强度。电子设备200也可以根据压力传感器的检测信号计算触摸的位置。在一些实施例中，作用于相同触摸位置，但不同触摸操作强度的触摸操作，可以对应不同的操作指令。例如：当有触摸操作强度小于第一压力阈值的触摸操作作用于短消息应用图标时，执行查看短消息的指令。当有触摸操作强度大于或等于第一压力阈值的触摸操作作用于短消息应用图标时，执行新建短消息的指令。
气压传感器用于测量气压。在一些实施例中，电子设备200通过气压传感器测得的气压值计算海拔高度，辅助定位和导航。
距离传感器，用于测量距离。电子设备200可以通过红外或激光测量距离。在一些实施例中，拍摄场景，电子设备200可以利用距离传感器测距以实现快速对焦。
接近光传感器可以包括例如发光二极管(LED)和光检测器，例如光电二极管。发光二极管可以是红外发光二极管。电子设备200通过发光二极管向外发射红外光。电子设备200使用光电二极管检测来自附近物体的红外反射光。当检测到充分的反射光时，可以确定电子设备200附近有物体。当检测到不充分的反射光时，电子设备200可以确定电子设备200附近没有物体。电子设备200可以利用接近光传感器检测用户手持电子设备200贴近耳朵通话，以便自动熄灭显示屏达到省电的目的。接近光传感器也可用于皮套模式，口袋模式自动解锁与锁屏。
环境光传感器用于感知环境光亮度。电子设备200可以根据感知的环境光亮度自适应调节显示屏250亮度。环境光传感器也可用于拍照时自动调节白平衡。环境光传感器还可以与接近光传感器配合，检测电子设备200是否在口袋里，以防误触。
指纹传感器用于采集指纹。电子设备200可以利用采集的指纹特性实现指纹解锁，访问应用锁，指纹拍照，指纹接听来电等。
温度传感器用于检测温度。在一些实施例中，电子设备200利用温度传感器检测的温度，执行温度处理策略。例如，当温度传感器上报的温度超过阈值，电子设备200执行降低位于温度传感器附近的处理器的性能，以便降低功耗实施热保护。在另一些实施例中，当温度低于另一阈值时，电子设备200对电池232加热，以避免低温导致电子设备200异常关机。在其他一些实施例中，当温度低于又一阈值时，电子设备200对电池232的输出电压执行升压，以避免低温导致的异常关机。
触摸传感器，也称“触控面板”。触摸传感器可以设置于显示屏250，由触摸传感器与显示屏250组成触摸屏，也称“触控屏”。触摸传感器用于检测作用于其上或附近的触摸操作。触摸传感器可以将检测到的触摸操作传递给应用处理器，以确定触摸事件类型。可以通过显示屏250提供与触摸操作相关的视觉输出。在另一些实施例中，触摸传感器也可以设置于电子设备200的表面，与显示屏250所处的位置不同。
骨传导传感器可以获取振动信号。在一些实施例中，骨传导传感器可以获取人体声部振动骨块的振动信号。骨传导传感器也可以接触人体脉搏，接收血压跳动信号。在一些实施例中，骨传导传感器也可以设置于耳机中，结合成骨传导耳机。音频模块可以基于骨传导传感器获取的声部振动骨块的振动信号，解析出语音信号，实现语音功能。应用处理器可以基于骨传导传感器获取的血压跳动信号解析心率信息，实现心率检测功能。
电子设备200的无线通信功能可以通过天线1，天线2，移动通信模块，无线通信模块，调制解调处理器以及基带处理器等实现。
天线1和天线2用于发射和接收电磁波信号。电子设备200中的每个天线可用于覆盖单个或多个通信频带。不同的天线还可以复用，以提高天线的利用率。例如：可以将天线1复用为无线局域网的分集天线。在另外一些实施例中，天线可以和调谐开关结合使用。
移动通信模块可以提供应用在电子设备200上的包括2G/3G/4G/5G等无线通信的解决方案。移动通信模块可以包括至少一个滤波器，开关，功率放大器，低噪声放大器(low noise amplifier，LNA)等。移动通信模块可以由天线1接收电磁波，并对接收的电磁波进行滤波，放大等处理，传送至调制解调处理器进行解调。移动通信模块还可以对经调制解调处理器调制后的信号放大，经天线1转为电磁波辐射出去。在一些实施例中，移动通信模块的至少部分功能模块可以被设置于处理器210中。在一些实施例中，移动通信模块的至少部分功能模块可以与处理器210的至少部分模块被设置在同一个器件中。
调制解调处理器可以包括调制器和解调器。其中，调制器用于将待发送的低频基带信号调制成中高频信号。解调器用于将接收的电磁波信号解调为低频基带信号。随后解调器将解调得到的低频基带信号传送至基带处理器处理。低频基带信号经基带处理器处理后，被传递给应用处理器。应用处理器通过音频设备(不限于扬声器，受话器等)输出声音信号，或通过显示屏250显示图像或视频。在一些实施例中，调制解调处理器可以是独立的器件。在另一些实施例中，调制解调处理器可以独立于处理器210，与移动通信模块或其他功能模块设置在同一个器件中。
无线通信模块可以提供应用在电子设备200上的包括无线局域网(wireless local area networks，WLAN)(如无线保真(wireless fidelity，Wi-Fi)网络)，蓝牙(bluetooth，BT)，全球导航卫星系统(global navigation satellite system，GNSS)，调频(frequency modulation，FM)，近距离无线通信技术(near field communication，NFC)，红外技术(infrared，IR)等无线通信的解决方案。无线通信模块可以是集成至少一个通信处理模块的一个或多个器件。无线通信模块经由天线2接收电磁波，将电磁波信号调频以及滤波处理，将处理后的信号发送到处理器210。无线通信模块还可以从处理器210接收待发送的信号，对其进行调频，放大，经天线2转为电磁波辐射出去。
在一些实施例中，电子设备200的天线1和移动通信模块耦合，天线2和无线通信模块耦合，使得电子设备200可以通过无线通信技术与网络以及其他设备通信。所述无线通信技术可以包括全球移动通讯系统(global system for mobile communications，GSM)，通用分组无线服务(general packet radio service，GPRS)，码分多址接入(code division multiple access，CDMA)，宽带码分多址(wideband code division multiple access，WCDMA)，时分码分多址(time-division code division multiple access，TD-SCDMA)，长期演进(long term evolution，LTE)，BT，GNSS，WLAN，NFC，FM，和/或IR技术等。所述GNSS可以包括全球卫星定位系统(global positioning system，GPS)，全球导航卫星系统(global navigation satellite system，GLONASS)，北斗卫星导航系统(beidou navigation satellite system，BDS)，准天顶卫星系统(quasi-zenith satellite system，QZSS)和/或星基增强系统(satellite based augmentation systems，SBAS)。
电子设备200可以通过ISP，摄像头，视频编解码器，GPU，显示屏250以及应用处理器等实现拍摄功能。
ISP用于处理摄像头反馈的参数。例如，拍照时，打开快门，光线通过镜头被传递到摄像头感光元件上，光信号转换为电信号，摄像头感光元件将所述电信号传递给ISP处理，转化为肉眼可见的图像。ISP还可以对图像的噪点，亮度，肤色进行算法优 化。ISP还可以对拍摄场景的曝光，色温等参数优化。在一些实施例中，ISP可以设置在摄像头中。
摄像头用于捕获静态图像或视频。物体通过镜头生成光学图像投射到感光元件。感光元件可以是电荷耦合器件(charge coupled device，CCD)或互补金属氧化物半导体(complementary metal-oxide-semiconductor，CMOS)光电晶体管。感光元件把光信号转换成电信号，之后将电信号传递给ISP转换成数字图像信号。ISP将数字图像信号输出到DSP加工处理。DSP将数字图像信号转换成标准的RGB，YUV等格式的图像信号。在一些实施例中，电子设备200可以包括1个或N个摄像头，N为大于1的正整数。
数字信号处理器用于处理数字信号，除了可以处理数字图像信号，还可以处理其他数字信号。例如，当电子设备200在频点选择时，数字信号处理器用于对频点能量进行傅里叶变换等。
视频编解码器用于对数字视频压缩或解压缩。电子设备200可以支持一种或多种视频编解码器。这样，电子设备200可以播放或录制多种编码格式的视频，例如：动态图像专家组(moving picture experts group，MPEG)1，MPEG2，MPEG3，MPEG4等。
NPU为神经网络(neural-network，NN)计算处理器，通过借鉴生物神经网络结构，例如借鉴人脑神经元之间传递模式，对输入信息快速处理，还可以不断的自学习。通过NPU可以实现电子设备200的智能认知等应用，例如：图像识别，人脸识别，语音识别，文本理解等。
外部存储器接口可以用于连接外部存储卡，例如Micro SD卡，实现扩展电子设备200的存储能力。外部存储卡通过外部存储器接口与处理器210通信，实现参数存储功能。例如将音乐，视频等文件保存在外部存储卡中。
内部存储器可以用于存储计算机可执行程序代码，所述可执行程序代码包括指令。处理器210通过运行存储在内部存储器的指令，从而执行电子设备200的各种功能应用以及参数处理。例如，在本申请实施例中，处理器210可以通过执行存储在内部存储器中的指令，确定充电线圈220相对于充电设备上的充电线圈的位移偏差以及位移方向，还可以根据上述位移偏差以及位移方向，提示用户移动电子设备200。内部存储器可以包括存储程序区和存储参数区。其中，存储程序区可存储操作系统，至少一个功能所需的应用程序(比如声音播放功能，图像播放功能等)等。存储参数区可存储电子设备200使用过程中所创建的参数(比如音频参数，电话本等)等。此外，内部存储器可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件，闪存器件，通用闪存存储器(universal flash storage，UFS)等。
电子设备200可以通过音频模块，扬声器，受话器，麦克风，耳机接口，以及应用处理器等实现音频功能。例如音乐播放，录音等。
音频模块用于将数字音频信息转换成模拟音频信号输出，也用于将模拟音频输入转换为数字音频信号。音频模块还可以用于对音频信号编码和解码。在一些实施例中，音频模块可以设置于处理器210中，或将音频模块的部分功能模块设置于处理器210中。扬声器，也称“喇叭”，用于将音频电信号转换为声音信号。电子设备200可以通 过扬声器收听音乐，或收听免提通话。受话器，也称“听筒”，用于将音频电信号转换成声音信号。当电子设备200接听电话或语音信息时，可以通过将受话器靠近人耳接听语音。麦克风，也称“话筒”，“传声器”，用于将声音信号转换为电信号。当拨打电话或发送语音信息或需要通过语音助手触发电子设备200执行某些功能时，用户可以通过人嘴靠近麦克风发声，将声音信号输入到麦克风。电子设备200可以设置至少一个麦克风。在另一些实施例中，电子设备200可以设置两个麦克风，除了采集声音信号，还可以实现降噪功能。在另一些实施例中，电子设备200还可以设置三个，四个或更多麦克风，实现采集声音信号，降噪，还可以识别声音来源，实现定向录音功能等。
耳机接口用于连接有线耳机。耳机接口可以是USB接口，也可以是3.5mm的开放移动电子设备平台(open mobile terminal platform，OMTP)标准接口，美国蜂窝电信工业协会(cellular telecommunications industry association of the USA，CTIA)标准接口。
按键包括开机键，音量键等。按键可以是机械按键。也可以是触摸式按键。电子设备200可以接收按键输入，产生与电子设备200的用户设置以及功能控制有关的键信号输入。
马达可以产生振动提示。马达可以用于来电振动提示，也可以用于触摸振动反馈。例如，作用于不同应用(例如拍照，音频播放等)的触摸操作，可以对应不同的振动反馈效果。作用于显示屏250不同区域的触摸操作，马达也可对应不同的振动反馈效果。不同的应用场景(例如：时间提醒，接收信息，闹钟，游戏等)也可以对应不同的振动反馈效果。触摸振动反馈效果还可以支持自定义。
指示器可以是指示灯，可以用于指示充电状态，电量变化，也可以用于指示消息，未接来电，通知等。
SIM卡接口用于连接SIM卡。SIM卡可以通过插入SIM卡接口，或从SIM卡接口拔出，实现和电子设备200的接触和分离。电子设备200可以支持1个或N个SIM卡接口，N为大于1的正整数。SIM卡接口可以支持Nano SIM卡，Micro SIM卡，SIM卡等。同一个SIM卡接口可以同时插入多张卡。所述多张卡的类型可以相同，也可以不同。SIM卡接口也可以兼容不同类型的SIM卡。SIM卡接口也可以兼容外部存储卡。电子设备200通过SIM卡和网络交互，实现通话以及参数通信等功能。在一些实施例中，电子设备200采用eSIM，即：嵌入式SIM卡。eSIM卡可以嵌在电子设备200中，不能和电子设备200分离。
以下实施例中的无线充电方法均可以在具有上述硬件结构的电子设备200中实现。
请参考图3，为本申请实施例提供的一种充电设备300的组成示意图。如图3所示，充电设备300可以包括电源接口310，处理模块320以及充电线圈330。在使用充电设备300对其他电子设备进行无线充电时，电源接口310用于连接电源，处理模块320用于将经过电源接口310接入的电流进行处理，以便通过充电线圈330产生稳定的磁场向被充电电子设备进行无线充电。示例性的，该充电设备300可以对如图2所示的电子设备200进行无线充电。如图4所示，当充电设备300接通电源，电流流过充电设备300中的充电线圈330时，在充电线圈330周围会产生磁场。当其他未通电 的线圈(如电子设备200中的充电线圈220)靠近该磁场时，由于电磁感应原理，充电线圈220上会产生感应电流。电子设备200可以利用充电线圈220上的感应电流对电池232进行充电，由此实现充电设备300对电子设备200的无线充电。该无线充电的最大送电距离可以达到约10厘米。
需要说明的是，本申请实施例提供的无线充电方法，涉及的充电设备可以是如图3所示的充电设备300，如充电设备等，也可以是支持对其他设备进行无线充电的具有如图2所示的组成的电子设备200，如手机，平板电脑等。当然还可以是其他能够对其他设备进行无线充电的充电设备。本申请实施例在此不做限制。
请参考图5，为本申请实施例提供的一种无线充电方法的流程示意图。为了更加清楚的说明本申请提供的方法，以下将电子设备中的充电圈称为受电线圈，将充电设备中的充电线圈称为送电线圈进行示例性说明。其中，受电线圈可以为本申请中的第一充电线圈，送电线圈可以为本申请中的第二充电线圈。如图5所示，该方法可以包括S501-S505。
S501、在使用设置有送电线圈的充电设备通过受电线圈为电子设备充电时，电子设备确定受电线圈的信号强度(signal strength)，该信号强度用于表征受电线圈在送电线圈产生的磁场中的磁场强度。
示例性的，请参考图6，当充电设备的送电线圈与电源连通后，送电线圈会产生如图6所示的以送电线圈为中心的磁场。一般而言，送电线圈产生的磁场为各向均匀的。即，到该送电线圈中心距离相同的点的磁场强度均相同，且沿该送电线圈中心向外辐射的磁场强度逐渐减小。结合图6，每个虚线圈上的点的磁场强度均相同，距离送电线圈中心越远，磁场强度越弱。
在用户将电子设备靠近充电设备时，受电线圈进入该磁场，此时可使用设置有送电线圈的充电设备通过受电线圈为电子设备充电。在使用设置有送电线圈的充电设备通过受电线圈为电子设备充电时，受电线圈上会产生感应电流。该感应电流与受电线圈当前所在磁场中位置的磁场强度存在对应关系，即该感应电流与受电线圈的信号强度存在对应关系。因此，电子设备可以根据该感应电流的大小，确定受电线圈此时的信号强度。
S502、电子设备根据信号强度确定受电线圈相对于送电线圈的位移偏差。
由于受电线圈的信号强度与两个线圈之间的距离存在对应关系，因此，电子设备可以根据该信号强度确定受电线圈相对于送电线圈的位移偏差。
示例性的，电子设备可以根据S501中获取到的信号强度和映射关系确定位移偏差，该映射关系可以包括信号强度和位移偏差的对应关系。
例如，上述映射关系可以通过如下方式获得：在不同的位移偏差下，多次测量受电线圈的信号强度，以获取该位移偏差下，信号强度的大小区间。经过反复测量，获取稳定的信号强度大小区间与位移偏差的对应关系。将多个对应关系汇总就可以获取包括不同信号强度大小区间与位移偏差的映射关系。该映射关系可以在电子设备出厂时预置在电子设备中。如，该映射关系可以如表1所示。
表1
信号强度大小区间 对位信息及位移偏差
(80,100] 对位准确
(60,80] 对位有偏差，位移偏差是x毫米
(40,60] 对位有偏差，位移偏差是2x毫米
(20,40] 对位有偏差，位移偏差是3x毫米
(0,20] 对位有偏差，位移偏差是4x毫米
0 无
表1中，信号强度值越大，表示信号强度越强，受电线圈到送电线圈的距离越近。其中位移偏差中的x可以是预定义的，也可以是可配置的，如可根据实际情况进行调整。例如，以x＝10为例。当电子设备确定受电线圈的信号强度在(80,100]范围内时，则确定两个线圈对位准确，无需调整位置；当受电线圈的信号强度在(60,80]范围内时，则确定两个线圈对位有偏差，位移偏差为10毫米；当受电线圈的信号强度在(40,60]范围内时，则确定两个线圈对位有偏差，位移偏差为20毫米；当受电线圈的信号强度在(20,40]范围内时，则确定两个线圈对位有偏差，位移偏差为30毫米；当受电线圈的信号强度在(0,20]范围内时，则确定两个线圈对位有偏差，位移偏差为40毫米。而当电子设备确定受电线圈的信号强度为0时，则充电设备没有对电子设备充电。
这样，电子设备根据受电线圈的信号强度和映射关系，便可确定受电线圈相对于充电设备的送电线圈是否对位有偏差，若对位有偏差还可确定受电线圈相对于送电线圈的位移偏差的具体值。
S503、电子设备获取受电线圈上N个位置处的磁场强度，N为大于或等于3的整数。
电子设备可以在受电线圈上或者受电线圈周围N个位置处设置霍尔传感器，以获取受电线圈上N个位置在磁场中的磁场强度，该磁场是送电线圈产生的磁场。
例如，以在受电线圈上设置霍尔传感器为例，当N＝3时，请参考图7，可以在电子设备的受电线圈上3个不同位置(如P1、P2和P3)分别设置霍尔传感器。电子设备可通过这3个不同位置的霍尔传感器，分别确定P1处的磁场强度为B1，P2处的磁场强度为B2，P3处的磁场强度为B3。
又如，以在受电线圈上设置霍尔传感器为例。当N＝4时，请参考图8，可以在电子设备的受电线圈上4个不同位置(如P1、P2，P3和P4)分别设置霍尔传感器。电子设备可以通过在这4个不同位置处设置的霍尔传感器，分别确定P1处的磁场强度为B1，P2处的磁场强度为B2，P3处的磁场强度为B3，P4处的磁场强度为B4。
S504、电子设备根据受电线圈上N个位置处的磁场强度，确定受电线圈相对于送电线圈的位移方向。
可以理解的是，受电线圈与送电线圈的相对位置不同，那么受电线圈上不同位置在送电线圈产生的磁场中的磁场强度也就不同。因此，可以通过确定受电线圈上多个不同位置的磁场强度，确定两个线圈的相对位置，或者说确定受电线圈相对于送电线圈的位移方向。
示例性的，电子设备可以根据受电线圈上N个位置处的磁场强度的大小关系，确 定受电线圈相对于送电线圈的位移方向。其中，位移方向是由受电线圈的几何中心指向根据上述磁场强度的大小关系确定的位置的方向。该位置可以为远离N个位置中磁场强度最小，且靠近N个位置中磁场强度最大的位置。
例如，请参考图9，当受电线圈处于送电线圈产生的磁场中时，如果电子设备根据受电线圈上至少3个点的磁场强度，确定出第1点的磁场强度最小，第2点的磁场强度最大，则表明送电线圈位于受电线圈的左下方，电子设备便可确定出受电线圈相对于送电线圈的位移方向是沿如图9中所示出的箭头方向。
可以理解的是，如果用户沿上述位移方向移动受电线圈(或者说移动电子设备)，受电线圈与送电线圈对位会逐渐准确，那么对电子设备的无线充电速度也就会逐渐提高。
在本申请实施例中，上述N个位置可以为3个位置，也可以为4个位置，也可为更多的位置。以下以N＝3以及N＝4进行示例性说明。
在一些实施例中，电子设备可以根据受电线圈上3个不同位置的磁场强度确定位移方向。
示例性的，请参考图10，可以通过在受电线圈上3个不同位置(如，第一位置P1，第二位置P2及第三位置P3)设置霍尔传感器，使得电子设备获取受电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2和第三位置P3的第三磁场强度B3。
如果B1小于B2，且B1小于B3，那么，P1就是这三个点中磁场强度最小的点，此时送电线圈可能就处于受电线圈第一区域的位置，第一区域是由P2，P3和P0所构成的区域。则电子设备可确定位移方向为由受电线圈的几何中心P0指向第一区域的方向。当移动受电线圈，使得受电线圈向第一区域移动时，受电线圈与送电线圈的对位就会随之变得准确，充电速度也就随之得到提高。
如果B2小于B3，且B2小于B1，那么，P2就是这三个点中磁场强度最小的点，此时送电线圈可能就处于受电线圈第二区域的位置，第二区域是由P1，P3和P0所构成的区域。则电子设备可确定位移方向为由受电线圈的几何中心P0指向第二区域的方向。当移动受电线圈，使得受电线圈向第二区域移动时，受电线圈与送电线圈的对位就会随之变得准确，充电速度也就随之得到提高。
如果B3小于B1，且B3小于B2，那么，P3就是这三个点中磁场强度最小的点，此时送电线圈可能就处于受电线圈第三区域的位置，第三区域是由P2，P1和P0所构成的区域。则电子设备可确定位移方向为由受电线圈的几何中心P0指向第三区域的方向。当移动受电线圈，使得受电线圈向第三区域移动时，受电线圈与送电线圈的对位就会随之变得准确，充电速度也就随之得到提高。
需要说明的是，本申请实施例中，位移方向的具体指向可以为上述区域中的任何位置。例如，当P1位置处的磁场强度最小时，该位移方向的具体指向可以更加靠近P2，也可以更加靠近P3。只要受电线圈向第一区域的方向移动就可以更加准确的对位，提高充电速度。类似的，当P2位置处的磁场强度最小时，该位移方向的具体指向可以更加靠近P2，也可以更加靠近P1。当P3位置处的磁场强度最小时，该位移方向的具体指向可以更加靠近P1，也可以更加靠近P3。本申请实施例在此不做限制。
进一步的，可以比较上述对应区域(如第一区域、第二区域和第三区域)包括的其他两个位置的磁场强度大小关系，确定位移方向指向的位置更靠近该区域中哪个位置。例如，当P1位置处的磁场强度最小时，如果B2大于B3，那么位移方向可以指向第一区域中更加靠近P2的位置，反之，如果B2小于B3，那么位移方向可以指向第一区域中更加靠近P3的位置。类似的，当P2位置处的磁场强度最小时，如果B1大于B3，那么位移方向可以指向第二区域中更加靠近P1的位置，反之，如果B1小于B3，那么位移方向可以指向第二区域中更加靠近P3的位置。当P3位置处的磁场强度最小时，如果B1大于B2，那么位移方向可以指向第三区域中更加靠近P1的位置，反之，如果B1小于B2，那么位移方向可以指向第三区域中更加靠近P2的位置。
在另一些实施例中，电子设备可以通过在受电线圈上4个不同位置设置霍尔传感器，以获取受电线圈上4个不同位置的磁场强度，从而确定受电线圈相对于送电线圈的位移方向。
示例性的，请参考图11，可以通过在受电线圈上4个不同位置(如，第一位置P1，第二位置P2，第三位置P3及第四位置P4)设置霍尔传感器，来使得电子设备获取受电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2、第三位置P3的第三磁场强度B3和第四位置P4的第四磁场强度B4。为了明确P1、P2、P3和P4的位置关系，以P1、P2、P3和P4沿逆时针方向排列为例。
如果B1最大，且B2大于B4，则电子设备可确定位移方向为由受电线圈的几何中心P0指向区域A的方向。区域A是由P1、P0和P1与P2连线中点所构成的区域。
如果B2最大，且B1大于B3，则电子设备可确定位移方向为由受电线圈的几何中心P0指向区域B的方向。区域B是由P2、P0和P1与P2连线中点所构成的区域。
如果B2最大，且B3大于B1，则电子设备可确定位移方向为由受电线圈的几何中心P0指向区域C的方向。区域C是由P2、P0和P3与P2连线中点所构成的区域。
如果B3最大，且B2大于B4，则电子设备可确定位移方向为由受电线圈的几何中心P0指向区域D的方向。区域D是由P3、P0和P3与P2连线中点所构成的区域。
如果B3最大，且B4大于B2，则电子设备可确定位移方向为由受电线圈的几何中心P0指向区域E的方向。区域E是由P3、P0和P3与P4连线中点所构成的区域。
如果B4最大，且B3大于B1，则电子设备可确定位移方向为由受电线圈的几何中心P0指向区域F的方向。区域F是由P4、P0和P3与P4连线中点所构成的区域。
如果B4最大，且B1大于B3，则电子设备可确定位移方向为由受电线圈的几何中心P0指向区域G的方向。区域G是由P4、P0和P1与P4连线中点所构成的区域。
如果B1最大，且B4大于B2，则电子设备可确定位移方向为由受电线圈的几何中心P0指向区域H的方向。区域H是由P1、P0和P1与P4连线中点所构成的区域。
可以理解的是，当受电线圈沿着上述位移方向移动时，会逐渐靠近与送电线圈对位准确的位置，也就能够提高无线充电的速度。
在本申请实施例中，受电线圈上设置霍尔传感器的位置可以任意选取，也可以对称均匀选取。
例如，请参考图12，以N＝4，对称均匀选取受电线圈上设置霍尔传感器的位置为例。在受电线圈上，以该线圈的几何中心P0为原点，在该原点的东、南、西、北四个 方位分别选取到P0距离相同的四个点：P1、P2、P3和P4，可在这4个点的位置分别设置霍尔传感器。这样，电子设备便可获取这4个点的磁场强度，进而确定在如图12所示的坐标系中，送电线圈与受电线圈的相对位置。
假设P1位置的磁场强度为Be，P2位置的磁场强度为Bs，P3位置的磁场强度为Bw，P4位置的磁场强度为Bn，那么，根据Bs、Bw、Be以及Bn的大小关系，就可以确定送电线圈相对于受电线圈的具体方位。
例如，如果东边的霍尔传感器检测到的磁场强度Be最大，且南北两个霍尔传感器检测到的磁场强度相等(Bn＝Bs)，则如图13所示，电子设备可以确定送电线圈在受电线圈的正东方向，因此，电子设备可确定位移方向为由受电线圈的几何中心P0指向正东方向。
如果东北两个霍尔传感器检测到的磁场强度相等(Be＝Bn)且大于西南两个霍尔传感器检测到的磁场强度，即Be＝Bn>Bs＝Bw，则如图14所示，电子设备可以确定送电线圈在受电线圈的正东北方向(东偏北45°方向)，因此，电子设备可确定位移方向为由受电线圈的几何中心P0指向正东北方向。
如果东边的霍尔传感器检测到的磁场强度Be大于北边的霍尔传感器检测到的磁场强度Bn，且东北两个霍尔传感器检测到的磁场强度大于西南两个霍尔传感器检测到的磁场强度，即Be>Bn>Bs>Bw，则如图15所示，电子设备可以确定送电线圈在受电线圈东偏北45°范围内，因此，电子设备可确定位移方向为由受电线圈的几何中心P0指向东偏北45°范围内的方向。
如此类推，电子设备可以大致确认送电线圈相对于受电线圈的八个不同的相对方位，并由此确定位移方向的指向。
需要说明的是，上述示例中，对称均匀地选取4个位置，能够将位移方向对应到地理坐标系中，如图13所示的正东方向等，因此能够更加方便的描述出位移方向。本申请实施例中，如果这4个位置是随意选取的，那么，根据上述方法，依然可以确定出至少8个不同的位移方向，用于标示当前状态下受电线圈与送电线圈的相对位置。
可以理解的是，对比以上N＝3以及N＝4两个示例，当N变大，也就是说在受电线圈上选取更多点的磁场强度进行对比时，电子设备能够将以受电线圈几何中心为原点的360°范围内的区域划分成更多的区域，这样确定出来的位移方向也就更加准确。在本申请实施例的实际使用过程中，N的取值可以在大于或等于3的整数范围内依据实际情况进行设置，也就是说，可以通过设置更多的霍尔传感器来确定位移方向。本申请实施例在此不做限制。
S505、电子设备根据位移偏差和位移方向，提示用户移动电子设备，移动的方向为位移方向所指示的方向，移动的距离为位移偏差所指示的距离。
示例性的，当电子设备确定受电线圈和送电线圈存在对位偏差时，电子设备可以根据位移偏差和位移方向，显示引导界面。该引导界面可以包括第一提示信息和第二提示信息。其中，第一提示信息用于提示用户移动电子设备的方向，该方向是位移方向所指示的方向。第二提示信息用于提示用户移动电子设备的距离，该距离是位移偏差所指示的距离。
例如，当电子设备确定送电线圈与受电线圈的相对位置为如图14所示的相对位置 时，电子设备可以显示如图16中的(a)所示的引导界面。如图16中的(a)所示，该引导界面上可以包括第一提示信息，如，图16中的(a)所示的带有方向的箭头1601，该箭头1601可以用于提示用户沿着箭头方向移动电子设备。引导界面还可以显示两个线圈的位置示意图作为第二提示信息。其中，黑色填充圆圈可表示送电线圈的位置，白色填充圆圈可表示受电线圈的位置。引导界面上两个圆圈的距离可以用于标示位移偏差所指示的距离。位移偏差越大，两个圆圈的中心距离越远，相反，位移偏差越小，两个圆圈的中心距离越近。图16中的(a)所示的界面所指示的位移偏差就小于如图16中的(b)所示的界面所指示的位移偏差。
又如，当电子设备确定送电线圈与受电线圈的相对位置为如图13所示的相对位置时，电子设备可以显示如图17所示的引导界面。图17所示的引导界面的具体描述与图16所示引导界面的描述类似，此处不再详细赘述。
可选的，电子设备显示的引导界面还可以包括第三提示信息。例如，当电子设备为手机时，该第三提示信息可以为如图16中的(a)所示的“正在无线充电(位移有偏差，请按图示移动手机)”字样，以进一步向用户示出需要对电子设备进行移动以提高充电速度。
需要说明的是，当用户按照电子设备显示的引导界面移动电子设备后，电子设备可以重复执行上述S501-S505，以使得电子设备能够确定用户在移动电子设备过程中，两个线圈的对位情况。电子设备可以按照一定的周期刷新显示的引导界面，以将当前位置下两个线圈的位移偏差以及位移方向显示出来。当然，电子设备还可以保持电子设备开始进行无线充电时显示的引导界面，直至电子设备被移动到两个线圈对位准确的位置。
在一些实施例中，当电子设备被用户移动到两个线圈对位准确的位置时，电子设备可以显示相关界面，用于提示用户电子设备在当前位置下两个线圈已经对位准确，能够以最快的速度进行充电。示例性的，当电子设备确定两个线圈已经对准时，就可以显示如图18所示的界面。其中，由于两个线圈已经对准，位移偏差非常小或者为0，因此，电子设备可以显示“Good”字样或者其他字样或符号，用于提示用户当前两个线圈没有位移偏差。另外，电子设备还可以显示两个同心圆，用于提示用户当前两个线圈几何中心重叠，也就是说，两个线圈对位准确。进一步的，该界面还可以包括提示信息，用于提示用户当前电子设备所处位置下，两个线圈不存在位移偏差或者位移偏差很小，无需移动。例如，该提示信息可以是如图18所示的“正在无线充电(位移OK)”字样。
需要说明的是，如果电子设备确定受电线圈和送电线圈不存在对位偏差，如在S502中电子设备确定受电线圈的信号强度在(80,100]范围内，电子设备可以显示如图18所示的界面，用于提示用户当前电子设备所处位置下，受电线圈与送电线圈不存在大的位移偏差，能够以较高的效率进行充电，在充电过程中不要移动电子设备。
这样，电子设备通过确定受电线圈在送电线圈所产生磁场中产生的信号强度，确定了两个线圈的位移偏差，以明确了受电线圈与对位准确时受电线圈应处的位置的距离。电子设备还通过确定受电线圈上不同位置的磁场强度，确定了受电线圈相对于送电线圈的位移方向。根据上述位移偏差和位移方向，电子设备可提示用户沿着位移方 向移动电子设备对应的距离。由此便实现了送电线圈与受电线圈的快速对位，以实现提高无线充电速度的目的。同时，本申请实施例提供的方法，对于电子设备的外形尺寸没有任何限制，因此，对于不同尺寸的可以进行无线充电的电子设备，都可以通过上述方法实现提高无线充电速度的目的。
上述主要从电子设备的角度对本申请实施例提供的方案进行了介绍。可以理解的是，电子设备为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对电子设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用对应各个功能划分各个功能模块的情况下，图19示出了上述实施例中涉及的电子设备的一种可能的逻辑组成示意图，该电子设备设置有第一充电线圈，如图19所示，该电子设备可以包括：确定单元1901，获取单元1902及提示单元1903。
其中，确定单元1901用于在使用设置有第二充电线圈的充电设备通过第一充电线圈为电子设备充电时，确定第一充电线圈的信号强度(signal strength)，该信号强度用于表征第一充电线圈在第二充电线圈产生的磁场中的磁场强度。示例性的，确定单元1901可以用于执行如图5所示S501。
确定单元1901，还用于根据信号强度确定第一充电线圈相对于第二充电线圈的位移偏差。示例性的，确定单元1901还可以用于执行如图5所示S502。
获取单元1902，用于获取第一充电线圈上N个位置处的磁场强度，N为大于或等于3的整数。示例性的，获取单元1902可以用于执行如图5所示S503。
确定单元1901，还用于根据第一充电线圈上N个位置处的磁场强度，确定第一充电线圈相对于第二充电线圈的位移方向。示例性的，确定单元1901还可以用于执行如图5所示S504。
提示单元1903，用于根据位移偏差和位移方向，提示用户移动电子设备，移动的方向为位移方向所指示的方向，移动的距离为位移偏差所指示的距离。示例性的，提示单元1903可以用于执行如图5所示S505。
在一种可能的设计中，确定单元1901具体用于根据第一充电线圈上N个位置处的磁场强度的大小关系，确定第一充电线圈相对于第二充电线圈的位移方向。其中，位移方向是由第一充电线圈的几何中心指向远离N个位置中磁场强度最小的位置，且靠近N个位置中磁场强度最大的位置的方向。
在一种可能的设计中，当N为3时，获取单元1902具体用于获取第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2和第三位置P3 的第三磁场强度B3。其中，如果B1小于B2，且B1小于B3，则位移方向具体为由第一充电线圈的几何中心P0指向第一区域的方向，第一区域是由P2，P3和P0所构成的区域。如果B2小于B3，且B2小于B1，则位移方向具体为由第一充电线圈的几何中心P0指向第二区域的方向，第二区域是由P1，P3和P0所构成的区域。如果B3小于B1，且B3小于B2，则位移方向具体为由第一充电线圈的几何中心P0指向第三区域的方向，第三区域是由P1，P1和P0所构成的区域。
在一种可能的设计中，第一充电线圈的P1、P2和P3处分别设置有霍尔传感器。获取单元1902具体用于通过P1处设置的霍尔传感器获取B1，通过P2处设置的霍尔传感器获取B2，通过P3处设置的霍尔传感器获取B3。
在一种可能的设计中，当N为4时，获取单元1902具体用于获取第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2，第三位置P3的第三磁场强度B3和第四位置P4的第四磁场强度B4。其中，P1、P2、P3和P4在第一充电线圈上沿逆时针方向排列。其中，如果B1最大，且B2大于B4，则位移方向具体为由第一充电线圈的几何中心P0指向区域A的方向，区域A是由P1、P0和P1与P2连线中点所构成的区域。如果B2最大，且B1大于B3，则位移方向具体为由第一充电线圈的几何中心P0指向区域B的方向，区域B是由P2、P0和P1与P2连线中点所构成的区域。如果B2最大，且B3大于B1，则位移方向具体为由第一充电线圈的几何中心P0指向区域C的方向，区域C是由P2、P0和P3与P2连线中点所构成的区域。如果B3最大，且B2大于B4，则位移方向具体为由第一充电线圈的几何中心P0指向区域D的方向，区域D是由P3、P0和P3与P2连线中点所构成的区域。如果B3最大，且B4大于B2，则位移方向具体为由第一充电线圈的几何中心P0指向区域E的方向，区域E是由P3、P0和P3与P4连线中点所构成的区域。如果B4最大，且B3大于B1，则位移方向具体为由第一充电线圈的几何中心P0指向区域F的方向，区域F是由P4、P0和P3与P4连线中点所构成的区域。如果B4最大，且B1大于B3，则位移方向具体为由第一充电线圈的几何中心P0指向区域G的方向，区域G是由P4、P0和P1与P4连线中点所构成的区域。如果B1最大，且B4大于B2，则位移方向具体为由第一充电线圈的几何中心P0指向区域H的方向，区域H是由P1、P0和P1与P4连线中点所构成的区域。
在一种可能的设计中，第一充电线圈的P1、P2、P3和P4处分别设置有霍尔传感器。获取单元1902具体用于通过P1处设置的霍尔传感器获取B1，通过P2处设置的霍尔传感器获取B2，通过P3处设置的霍尔传感器获取B3，通过P4处设置的霍尔传感器获取B4。
在一种可能的设计中，提示单元1903具体用于根据位移偏差和位移方向，显示引导界面，引导界面包括第一提示信息和第二提示信息。其中，第一提示信息用于提示用户移动电子设备的方向，第一提示信息提示的方向是位移方向所指示的方向。第二提示信息用于提示用户移动电子设备的距离，第二提示信息提示的距离是位移偏差所指示的距离。
在一种可能的设计中，确定单元1901具体用于根据第一充电线圈上的感应电流确定信号强度。
在一种可能的设计中，确定单元1901具体用于根据信号强度和映射关系确定位移偏差，映射关系包括信号强度和位移偏差的对应关系。
需要说明的是，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。本申请实施例提供的电子设备，用于执行上述方法中电子设备的功能，因此可以达到与上述通信方法相同的效果。作为可选而不是必须，可以理解的是，本申请实施例中确定单元1901、获取单元1902以及提示单元1903，其功能可以分别由独立的硬件模块实现，或者分别由独立的软件模块实现，也可以由共同的硬件处理平台执行程序指令的方式来实现。
本申请实施例还提供的一种电子设备，该电子设备可以包括第一充电线圈，充电管理模块，处理器以及存储器。其中,第一充电线圈，充电管理模块，处理器和存储器耦合。存储器可以用于存储计算机程序代码，计算机程序代码包括计算机指令。当计算机指令被电子设备执行时，使得电子设备可以执行如图5所示的无线充电方法。
本申请实施例还提供一种芯片系统，芯片系统应用于包括第一充电线圈的电子设备；如图20所示，该芯片系统包括至少一个处理器2001和至少一个接口电路2002。处理器2001和接口电路2002可通过线路互联。例如，接口电路2002可用于从其它装置(例如电子设备的存储器)接收信号。又例如，接口电路2002可用于向其它装置(例如处理器2001或者电子设备的显示屏)发送信号。示例性的，接口电路2002可读取存储器中存储的指令，并将该指令发送给处理器2001。当所述指令被处理器2001执行时，可使得电子设备执行上述实施例中的各个步骤。当然，该芯片系统还可以包含其他分立器件，本申请实施例对此不作具体限定。
在上述实施例中的功能或动作或操作或步骤等，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包括一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包括这些改动和变型在内。

Claims (22)

  1. 一种无线充电方法，其特征在于，应用于电子设备，所述电子设备包括第一充电线圈；所述方法包括：
    在使用设置有第二充电线圈的充电设备通过所述第一充电线圈为所述电子设备充电时，所述电子设备确定所述第一充电线圈的信号强度signal strength，所述信号强度用于表征所述第一充电线圈在所述第二充电线圈产生的磁场中的磁场强度；
    所述电子设备根据所述信号强度确定所述第一充电线圈相对于所述第二充电线圈的位移偏差；
    所述电子设备获取所述第一充电线圈上N个位置处的磁场强度，N为大于或等于3的整数；
    所述电子设备根据所述第一充电线圈上N个位置处的磁场强度，确定所述第一充电线圈相对于所述第二充电线圈的位移方向；
    所述电子设备根据所述位移偏差和所述位移方向，提示用户移动所述电子设备，移动的方向为所述位移方向所指示的方向，移动的距离为所述位移偏差所指示的距离。
  2. 根据权利要求1所述的方法，其特征在于，所述电子设备根据所述第一充电线圈上N个位置处的磁场强度，确定所述第一充电线圈相对于所述第二充电线圈的位移方向，包括：
    所述电子设备根据所述第一充电线圈上所述N个位置处的磁场强度的大小关系，确定所述第一充电线圈相对于所述第二充电线圈的位移方向；
    其中，所述位移方向是由所述第一充电线圈的几何中心指向远离所述N个位置中磁场强度最小的位置，且靠近所述N个位置中磁场强度最大的位置的方向。
  3. 根据权利要求2所述的方法，其特征在于，当N为3时，所述电子设备获取所述第一充电线圈上N个位置处的磁场强度，包括：
    所述电子设备获取所述第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2和第三位置P3的第三磁场强度B3；
    其中，如果所述B1小于所述B2，且所述B1小于所述B3，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向第一区域的方向，所述第一区域是由所述P2，所述P3和所述P0所构成的区域；
    如果所述B2小于所述B3，且所述B2小于所述B1，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向第二区域的方向，所述第二区域是由所述P1，所述P3和所述P0所构成的区域；
    如果所述B3小于所述B1，且所述B3小于所述B2，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向第三区域的方向，所述第三区域是由所述P1，所述P1和所述P0所构成的区域。
  4. 根据权利要求3所述的方法，其特征在于，所述第一充电线圈的所述P1、所述P2和所述P3处分别设置有霍尔传感器；
    所述电子设备获取所述第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2和第三位置P3的第三磁场强度B3，包括：
    所述电子设备通过所述P1处设置的霍尔传感器获取所述B1，通过所述P2处设置 的霍尔传感器获取所述B2，通过所述P3处设置的霍尔传感器获取所述B3。
  5. 根据权利要求2所述的方法，其特征在于，当N为4时，所述电子设备获取所述第一充电线圈上N个位置处的磁场强度，包括：
    所述电子设备获取所述第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2，第三位置P3的第三磁场强度B3和第四位置P4的第四磁场强度B4；其中，所述P1、所述P2、所述P3和所述P4在所述第一充电线圈上沿逆时针方向排列；
    其中，如果所述B1最大，且所述B2大于所述B4，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域A的方向，所述区域A是由所述P1、所述P0和所述P1与所述P2连线中点所构成的区域；
    如果所述B2最大，且所述B1大于所述B3，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域B的方向，所述区域B是由所述P2、所述P0和所述P1与所述P2连线中点所构成的区域；
    如果所述B2最大，且所述B3大于所述B1，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域C的方向，所述区域C是由所述P2、所述P0和所述P3与所述P2连线中点所构成的区域；
    如果所述B3最大，且所述B2大于所述B4，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域D的方向，所述区域D是由所述P3、所述P0和所述P3与所述P2连线中点所构成的区域；
    如果所述B3最大，且所述B4大于所述B2，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域E的方向，所述区域E是由所述P3、所述P0和所述P3与所述P4连线中点所构成的区域；
    如果所述B4最大，且所述B3大于所述B1，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域F的方向，所述区域F是由所述P4、所述P0和所述P3与所述P4连线中点所构成的区域；
    如果所述B4最大，且所述B1大于所述B3，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域G的方向，所述区域G是由所述P4、所述P0和所述P1与所述P4连线中点所构成的区域；
    如果所述B1最大，且所述B4大于所述B2，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域H的方向，所述区域H是由所述P1、所述P0和所述P1与所述P4连线中点所构成的区域。
  6. 根据权利要求5所述的方法，其特征在于，所述第一充电线圈的所述P1、所述P2、所述P3和所述P4处分别设置有霍尔传感器；
    所述电子设备获取所述第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2，第三位置P3的第三磁场强度B3和第四位置P4的第四磁场强度B4，包括：
    所述电子设备通过所述P1处设置的霍尔传感器获取所述B1，通过所述P2处设置的霍尔传感器获取所述B2，通过所述P3处设置的霍尔传感器获取所述B3，通过所述P4处设置的霍尔传感器获取所述B4。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述电子设备根据所述位移偏差和所述位移方向，提示用户移动所述电子设备，包括：
    所述电子设备根据所述位移偏差和所述位移方向，显示引导界面，所述引导界面包括第一提示信息和第二提示信息；
    其中，所述第一提示信息用于提示用户移动所述电子设备的方向，所述第一提示信息提示的方向是所述位移方向所指示的方向；
    所述第二提示信息用于提示用户移动所述电子设备的距离，所述第二提示信息提示的距离是所述位移偏差所指示的距离。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述电子设备确定所述第一充电线圈的信号强度，包括：
    所述电子设备根据所述第一充电线圈上的感应电流确定所述信号强度。
  9. 根据权利要求1-8任一项所述的方法，其特征在于，所述电子设备根据所述信号强度确定所述第一充电线圈相对于所述第二充电线圈的位移偏差，包括：
    所述电子设备根据所述信号强度和映射关系确定所述位移偏差，所述映射关系包括所述信号强度和所述位移偏差的对应关系。
  10. 一种电子设备，其特征在于，所述电子设备设置有第一充电线圈；
    所述电子设备包括确定单元，获取单元和提示单元；
    所述确定单元，用于在使用设置有第二充电线圈的充电设备通过所述第一充电线圈为所述电子设备充电时，确定所述第一充电线圈的信号强度signal strength，所述信号强度用于表征所述第一充电线圈在所述第二充电线圈产生的磁场中的磁场强度；根据所述信号强度确定所述第一充电线圈相对于所述第二充电线圈的位移偏差；
    所述获取单元，用于获取所述第一充电线圈上N个位置处的磁场强度，N为大于或等于3的整数；
    所述确定单元，还用于根据所述第一充电线圈上N个位置处的磁场强度，确定所述第一充电线圈相对于所述第二充电线圈的位移方向；
    所述提示单元，用于根据所述位移偏差和所述位移方向，提示用户移动所述电子设备，移动的方向为所述位移方向所指示的方向，移动的距离为所述位移偏差所指示的距离。
  11. 根据权利要求10所述的电子设备，其特征在于，所述确定单元，用于根据所述第一充电线圈上N个位置处的磁场强度，确定所述第一充电线圈相对于所述第二充电线圈的位移方向，包括：
    所述确定单元，用于根据所述第一充电线圈上所述N个位置处的磁场强度的大小关系，确定所述第一充电线圈相对于所述第二充电线圈的位移方向；
    其中，所述位移方向是由所述第一充电线圈的几何中心指向远离所述N个位置中磁场强度最小的位置，且靠近所述N个位置中磁场强度最大的位置的方向。
  12. 根据权利要求11所述的电子设备，其特征在于，当N为3时，所述获取单元，用于获取所述第一充电线圈上N个位置处的磁场强度，包括：
    所述获取单元，用于获取所述第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2和第三位置P3的第三磁场强度B3；
    其中，如果所述B1小于所述B2，且所述B1小于所述B3，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向第一区域的方向，所述第一区域是由所述P2，所述P3和所述P0所构成的区域；
    如果所述B2小于所述B3，且所述B2小于所述B1，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向第二区域的方向，所述第二区域是由所述P1，所述P3和所述P0所构成的区域；
    如果所述B3小于所述B1，且所述B3小于所述B2，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向第三区域的方向，所述第三区域是由所述P1，所述P1和所述P0所构成的区域。
  13. 根据权利要求12所述的电子设备，其特征在于，所述第一充电线圈的所述P1、所述P2和所述P3处分别设置有霍尔传感器；
    所述获取单元，用于获取所述第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2和第三位置P3的第三磁场强度B3，包括：
    所述获取单元，用于通过所述P1处设置的霍尔传感器获取所述B1，通过所述P2处设置的霍尔传感器获取所述B2，通过所述P3处设置的霍尔传感器获取所述B3。
  14. 根据权利要求11所述的电子设备，其特征在于，当N为4时，所述获取单元，用于获取所述第一充电线圈上N个位置处的磁场强度，包括：
    所述获取单元，用于获取所述第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2，第三位置P3的第三磁场强度B3和第四位置P4的第四磁场强度B4；其中，所述P1、所述P2、所述P3和所述P4在所述第一充电线圈上沿逆时针方向排列；
    其中，如果所述B1最大，且所述B2大于所述B4，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域A的方向，所述区域A是由所述P1、所述P0和所述P1与所述P2连线中点所构成的区域；
    如果所述B2最大，且所述B1大于所述B3，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域B的方向，所述区域B是由所述P2、所述P0和所述P1与所述P2连线中点所构成的区域；
    如果所述B2最大，且所述B3大于所述B1，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域C的方向，所述区域C是由所述P2、所述P0和所述P3与所述P2连线中点所构成的区域；
    如果所述B3最大，且所述B2大于所述B4，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域D的方向，所述区域D是由所述P3、所述P0和所述P3与所述P2连线中点所构成的区域；
    如果所述B3最大，且所述B4大于所述B2，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域E的方向，所述区域E是由所述P3、所述P0和所述P3与所述P4连线中点所构成的区域；
    如果所述B4最大，且所述B3大于所述B1，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域F的方向，所述区域F是由所述P4、所述P0和所述P3与所述P4连线中点所构成的区域；
    如果所述B4最大，且所述B1大于所述B3，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域G的方向，所述区域G是由所述P4、所述P0和所述P1与所述P4连线中点所构成的区域；
    如果所述B1最大，且所述B4大于所述B2，则所述位移方向具体为由所述第一充电线圈的几何中心P0指向区域H的方向，所述区域H是由所述P1、所述P0和所述P1与所述P4连线中点所构成的区域。
  15. 根据权利要求14所述的电子设备，其特征在于，所述第一充电线圈的所述P1、所述P2、所述P3和所述P4处分别设置有霍尔传感器；
    所述获取单元，用于获取所述第一充电线圈上第一位置P1的第一磁场强度B1，第二位置P2的第二磁场强度B2，第三位置P3的第三磁场强度B3和第四位置P4的第四磁场强度B4，包括：
    所述获取单元，用于通过所述P1处设置的霍尔传感器获取所述B1，通过所述P2处设置的霍尔传感器获取所述B2，通过所述P3处设置的霍尔传感器获取所述B3，通过所述P4处设置的霍尔传感器获取所述B4。
  16. 根据权利要求10-15任一项所述的电子设备，其特征在于，所述提示单元，用于根据所述位移偏差和所述位移方向，提示用户移动所述电子设备，包括：
    所述提示单元，用于根据所述位移偏差和所述位移方向，显示引导界面，所述引导界面包括第一提示信息和第二提示信息；
    其中，所述第一提示信息用于提示用户移动所述电子设备的方向，所述第一提示信息提示的方向是所述位移方向所指示的方向；
    所述第二提示信息用于提示用户移动所述电子设备的距离，所述第二提示信息提示的距离是所述位移偏差所指示的距离。
  17. 根据权利要求10-16任一项所述的电子设备，其特征在于，所述确定单元，用于确定所述第一充电线圈的信号强度，包括：
    所述确定单元，用于根据所述第一充电线圈上的感应电流确定所述信号强度。
  18. 根据权利要求10-17任一项所述的电子设备，其特征在于，所述确定单元，用于根据所述信号强度确定所述第一充电线圈相对于所述第二充电线圈的位移偏差，包括：
    所述确定单元，用于根据所述信号强度和映射关系确定所述位移偏差，所述映射关系包括所述信号强度和所述位移偏差的对应关系。
  19. 一种电子设备，其特征在于，所述电子设备包括：第一充电线圈，充电管理模块，处理器和存储器；所述处理器，所述第一充电线圈，所述充电管理模块和所述存储器耦合，所述存储器用于存储计算机程序代码，所述计算机程序代码包括计算机指令，当所述计算机指令被所述电子设备执行时，使得所述电子设备执行如权利要求1至9中任一项所述的无线充电方法。
  20. 一种计算机可读存储介质，其特征在于，包括：计算机软件指令；
    当所述计算机软件指令在电子设备中运行时，使得所述电子设备执行如权利要求1至9中任一项所述的无线充电方法。
  21. 一种计算机程序产品，其特征在于，当所述计算机程序产品在计算机上运行 时，使得所述计算机执行如权利要求1至9中任一项所述的无线充电方法。
  22. 一种芯片系统，其特征在于，所述芯片系统应用于包括第一充电线圈的电子设备；所述芯片系统包括一个或多个接口电路和一个或多个处理器；所述接口电路和所述处理器通过线路互联；所述接口电路用于从所述电子设备的存储器接收信号，并向所述处理器发送所述信号，所述信号包括所述存储器中存储的计算机指令；当所述处理器执行所述计算机指令时，所述电子设备执行如权利要求1至9中任一项所述的方法。
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