Patent Description:
With rapid development of wireless charging technologies, wireless charging functions are more and more commonly used in terminal devices (for example, a mobile phone and a tablet computer), and a terminal device with a wireless charging function is favored by many users.

In the related technologies, when the wireless charging function is used, a charging state of the terminal device is usually fixed. In this way, wireless charging performance of the terminal device is relatively poor, and a user requirement cannot be well met. <CIT> discloses that a threshold voltage V is set in the first control module of the electronic device. When V <NUM> is larger than V, it indicates that the receiving coil and the transmitting coil are in a strong coupling state, and turn-on or turn-off of the at least two first switches of the first switch module is controlled to reduce the number of turns of sub-coils that work effectively in the receiving coil. When V <NUM> is not larger than V, it indicates that the receiving coil and the transmitting coil are in a weak coupling state, and turn-on or turn-off of the at least two first switches of the first switch module is controlled to increase the number of turns of sub-coils that work effectively in the receiving coil.

Embodiments of the present disclosure provide a wireless charging control method, a circuit, and a terminal device, to resolve a problem that wireless charging performance of a terminal device is poor when a wireless charging function is used.

To resolve the foregoing technical problem, the present disclosure is implemented as follows:.

According to a first aspect, an embodiment of the present disclosure provides a wireless charging control method, which is defined in claim <NUM>.

According to a second aspect, an embodiment of the present disclosure provides a wireless charging control circuit, which is defined in claim <NUM>.

According to a third aspect, an embodiment of the present disclosure provides a terminal device, which is defined in claim <NUM>.

According to a fourth aspect, an embodiment of the present disclosure provides a computer-readable medium storing a computer program, which is defined in claim <NUM>.

It is to be understood that both the forgoing general description and the following detailed description are exemplary only, and are not restrictive of the present disclosure.

To describe the technical solutions in the embodiments of the present disclosure more clearly, the following briefly describes the accompanying drawings required for describing the embodiments of the present disclosures.

The following clearly and completely describes the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are some rather than all of the embodiments of the present disclosure.

The following first describes a wireless charging control method provided in the embodiments of the present disclosure.

It should be noted that the wireless charging control method provided in the embodiments of the present disclosure is applied to a wireless charging control circuit in a terminal device, where the wireless charging control circuit includes a wireless charging receive coil, the wireless charging receive coil has at least two operating states, and inductance values of the wireless charging receive coil in the operating states are different from each other.

The wireless charging receive coil may have two operating states; or the wireless charging receive coil may have at least two operating states, for example, three, four, or five operating states.

To ensure that the wireless charging receive coil has different inductance values in different operating states, the wireless charging receive coil may access the wireless charging control circuit by using different quantities of coil turns in different operating states. Specifically, a larger quantity of coil turns for the wireless charging receive coil to access the wireless charging control circuit indicates a larger inductance value of the wireless charging receive coil, and a smaller quantity of coil turns for the wireless charging receive coil to access the wireless charging control circuit indicates a smaller inductance value of the wireless charging receive coil.

It should be noted that the wireless charging control circuit may further include a control module <NUM> shown in <FIG>. The wireless charging control method provided in the embodiments of the present disclosure may be specifically applied to the control module <NUM>. Optionally, the control module <NUM> may be a synchronous rectifier control module (synchronous rectifier control module).

In addition, types of terminal devices are various. For example, the terminal device may be a computer (Computer), a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a personal digital assistant (personal digital assistant, PDA), a mobile internet device (Mobile Internet Device, MID), or a wearable device (Wearable Device).

<FIG> is a flowchart of a wireless charging control method according to an embodiment of the present disclosure. As shown in <FIG>, the wireless charging control method includes the following steps.

Step <NUM>: Obtain an induced voltage of a wireless charging receive coil.

A wireless charging control circuit may further include an analog-to-digital converter (Analog-to-Digital Converter, ADC), and the induced voltage of the wireless charging receive coil may be obtained through sampling by the ADC.

It should be noted that wireless charging of the terminal device may be implemented by using a wireless charging system. <FIG> shows an equivalent circuit diagram of the wireless charging system. Specifically, a circuit on the left in <FIG> is a basic equivalent circuit at a transmit end, and the basic equivalent circuit at the transmit end includes a wireless charging transmit coil (which may be referred to as a transmit end coil for short); and a circuit on the right in <FIG> is a basic equivalent circuit at a receive end, and the basic equivalent circuit at the receive end includes the foregoing wireless charging receive coil (which may be referred to as a receive end coil for short). The circuits on the left and right in <FIG> meet the following formula: <MAT>.

V is the induced voltage of the wireless charging receive coil (which may also be referred to as an equivalent voltage of the transmit end at the receive end); j is an imaginary number; w is an angular frequency; M is a mutual inductance between the wireless charging transmit coil and the wireless charging receive coil; Vs is an input voltage of the wireless charging transmit coil; and Y11 is a sum of impedances of a capacitance, an inductance, and a resistance of the circuit at the transmit end.

It can be easily learned that V is proportional to M. The larger M, the larger V.

Generally, M may be calculated by using the following Norman formula: <MAT>.

In the formula, u<NUM> is a magnetic conductivity, N<NUM> is a quantity of turns of the wireless charging transmit coil, N<NUM> is a quantity of turns of the wireless charging receive coil (the quantity of turns is specifically a quantity of coil turns in the wireless charging control circuit), dl1 is a line element of the wireless charging transmit coil, dl2 is a line element of the wireless charging receive coil, and d is a distance between the wireless charging transmit coil and the wireless charging receive coil.

It can be easily learned that M is proportional to N<NUM>. The larger N<NUM>, the larger M.

In addition, M is further related to a relative position of a center of the wireless charging transmit coil and a center of the wireless charging receive coil. Specifically, the closer the center of the wireless charging transmit coil is to the center of the wireless charging receive coil, the larger M is; and the farther the center of the wireless charging transmit coil is from the center of the wireless charging receive coil, the smaller M is.

Step <NUM>: Control, based on the induced voltage, the wireless charging receive coil to operate in a corresponding operating state.

It should be noted that there are various specific implementation forms of step <NUM>, and the following provides descriptions by using an example.

In a specific implementation, step <NUM> includes:.

Specifically, the preset voltage may be a prestored value, and the preset voltage may be a normal charging voltage of the wireless charging receive coil.

The foregoing implementation form is described in detail by using a specific example.

It is assumed that the wireless charging receive coil has only two operating states: the first operating state and the second operating state. A quantity of coil turns for the wireless charging receive coil to access the wireless charging control circuit in the first operating state is greater than a quantity of coil turns for the wireless charging receive coil to access the wireless charging control circuit in the second operating state. In this way, the inductance value in the first operating state is greater than the inductance value in the second operating state.

Generally, if the quantity of coil turns for the wireless charging receive to access the wireless charging control circuit is larger, an impedance of the wireless charging receiving coil is greater. Therefore, when wireless charging is performed, an energy loss caused by the wireless charging receive coil is greater, and correspondingly, charging efficiency of the terminal device is lower, and wireless charging power of the terminal device is also higher. It can be learned that, in comparison with a case that the wireless charging receive coil operates in the first operating state, charging efficiency of the terminal device is higher when the wireless charging receive coil operates in the second operating state.

In addition, it can be learned from the foregoing two formulas that, for the wireless charging receive coil, if a same induced voltage needs to be generated in positions at different distances from the wireless charging transmit coil, an inductance value of the wireless charging receive coil at a position far from the wireless charging transmit coil needs to be greater than an inductance value at a position close to the wireless charging transmit coil. On the contrary, if an inductance value of the wireless charging receive coil is larger, a charging degree of freedom of the terminal device is higher; and if the inductance value of the wireless charging receive coil is smaller, the charging degree of freedom of the terminal device is lower. It can be learned that, in comparison with a case that the wireless charging receive coil operates in the second operating state, the charging degree of freedom of the terminal device is higher when the wireless charging receive coil operates in the first operating state.

In this embodiment, when the wireless charging system in <FIG> starts to perform wireless charging, the wireless charging receiving coil may operate in the first operating state by default. Then the wireless charging control circuit may obtain the induced voltage of the wireless charging receive coil, and compare the obtained induced voltage with the preset voltage.

If the obtained induced voltage is not less than the preset voltage, it indicates that the terminal device can be charged normally at present. In this case, the wireless charging control circuit may switch the wireless charging receive coil from the first operating state to the second operating state, and control the wireless charging receive coil to operate in the second operating state. In this way, in this embodiment, charging efficiency of the terminal device can be ensured when normal charging of the terminal device is ensured as far as possible.

If the obtained induced voltage is less than the preset voltage, when the wireless charging receive coil is switched from the first operating state to the second operating state, because the quantity of coil turns for the wireless charging receive coil to access the wireless charging control circuit is reduced, the induced voltage of the wireless charging receive coil is reduced, and a difference between the induced voltage of the wireless charging receive coil and the preset voltage is further increased. This is not conducive to normal charging of the terminal device. Therefore, in this case, the wireless charging receive coil can still operate in the first operating state, so that the charging degree of freedom of the terminal device can be ensured when normal charging of the terminal device is ensured as much as possible.

It can be learned that, in this implementation form, the charging efficiency and the charging degree of freedom of the terminal device can be considered when normal charging of the terminal device is ensured as far as possible, to ensure wireless charging performance of the terminal device from a perspective of the charging efficiency and the charging degree of freedom.

It should be noted that the implementation form of step <NUM> is not limited thereto. In another implementation form, when the wireless charging receive coil is controlled, based on the induced voltage, to operate in the corresponding operating state, the wireless charging control circuit can improve wireless charging performance of the terminal device from a perspective other than the charging efficiency and the charging degree of freedom.

In this embodiment of the present disclosure, a wireless charging receive coil in a wireless charging control circuit may have at least two operating states, and inductance values of the wireless charging receive coil in the operating states are different from each other. In this way, the wireless charging control circuit can control, based on the induced voltage of the wireless charging receive coil, the wireless charging receive coil to operate in a corresponding operating state. It can be learned that, in the embodiments of the present disclosure, a charging state of a terminal device is not fixed, and the charging state of the terminal device may be flexibly adjusted based on the induced voltage of the wireless charging receive coil, to ensure wireless charging performance of the terminal device (for example, to ensure charging efficiency, a charging degree of freedom, and the like), thereby better meeting a user requirement and achieving good user charging experience.

The wireless charging control circuit further includes a rectifier, the rectifier includes M rectifier arms, and M is an integer greater than or equal to <NUM>; and the wireless charging receive coil has M lead terminals, and the M lead terminals are electrically connected to the M rectifier arms in one-to-one correspondence, where any two lead terminals form one terminal group, each terminal group corresponds to one inductance value, and inductance values corresponding to at least two terminal groups are different from each other; and
the controlling, based on the induced voltage, the wireless charging receive coil to operate in a corresponding operating state includes:
setting, based on the induced voltage, two rectifier arms that are electrically connected to two lead terminals in a corresponding terminal group to a conducting state, and setting a remaining rectifier arm to a non-conducting state.

M may be <NUM>, <NUM>, <NUM>, or others integer greater than <NUM>, which are not listed one by one herein.

As shown in <FIG> and <FIG>, the wireless charging receive coil <NUM> may be a tap coil, and may have three lead terminals (M is <NUM>): a lead terminal L1, a lead terminal L2, and a lead terminal L3. The lead terminal L1 and the lead terminal L2 form one terminal group, and an inductance value corresponding to the terminal group is an inductance value (assumed as an inductance value in the second operating state) of a coil (which may be considered as a small inductance coil) between the lead terminal L1 and the lead terminal L2 in the wireless charging receive coil <NUM>. The lead terminal L1 and the lead terminal L3 form another terminal group, and an inductance value corresponding to the terminal group is an inductance value (assumed as an inductance value in the first operating state) of a coil (which may be considered as a large inductance coil) between the lead terminal L1 and the lead terminal L3 in the wireless charging receive coil <NUM>.

As shown in <FIG>, the rectifier in the wireless charging control circuit may include three rectifier arms: a first rectifier arm <NUM>, a second rectifier arm <NUM>, and a third rectifier arm <NUM>. The first rectifier arm <NUM> is electrically connected to the lead terminal L1, the second rectifier arm <NUM> is electrically connected to the lead terminal L2, and the third rectifier arm <NUM> is electrically connected to the lead terminal L3.

In this embodiment, the control module <NUM> may obtain the induced voltage of the wireless charging receive coil, and compare the obtained induced voltage with the preset voltage.

If the induced voltage is not less than the preset voltage, the control module <NUM> may set the first rectifier arm <NUM> electrically connected to the lead terminal L1 and the second rectifier arm <NUM> electrically connected to the lead terminal L2 to a conducting state, and set the third rectifier arm <NUM> to a non-conducting state. In this case, the wireless charging receive coil <NUM> may operate in the second operating state.

If the induced voltage is less than the preset voltage, the control module <NUM> may set the first rectifier arm <NUM> electrically connected to the lead terminal L1 and the third rectifier arm <NUM> electrically connected to the lead terminal L3 to a conducting state, and set the second rectifier arm <NUM> to a non-conducting state. In this case, the wireless charging receive coil <NUM> may operate in the first operating state.

It can be learned that by controlling whether each rectifier arm is conductive, an operating state of the wireless charging receive coil can be conveniently controlled in this embodiment.

An output port and M input ports are disposed in the rectifier;.

The first switching transistor and the second switching transistor in each rectifier arm may be MOSs. It can be understood that the MOS is an abbreviation of MOSFET, and the MOSFET is a metal-oxide semiconductor field-effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor).

As shown in <FIG>, an output port VRECT and three input ports are disposed in the rectifier, and the three input ports are an input port AC1, an input port AC2, and an input port AC3.

In addition, the first switching transistor in the first rectifier arm <NUM> is Q1, and the second switching transistor in the first rectifier arm <NUM> is Q2. A first electrode of Q1 is electrically connected to the output port VRECT, a second electrode of Q1 is electrically connected to the control module <NUM>, a third electrode of Q1 is electrically connected to a first electrode of Q2, a second electrode of Q2 is electrically connected to the control module <NUM>, a third electrode of Q2 is grounded, and the lead terminal L1 is electrically connected to the third electrode of Q1 and the first electrode of Q2 by using the input port AC1.

Similarly, the first switching transistor in the second rectifier arm <NUM> is Q3, and the second switching transistor in the second rectifier arm <NUM> is Q4. A first electrode of Q3 is electrically connected to the output port VRECT, a second electrode of Q3 is electrically connected to the control module <NUM>, a third electrode of Q3 is electrically connected to a first electrode of Q4, a second electrode of Q4 is electrically connected to the control module <NUM>, a third electrode of Q4 is grounded, and the lead terminal L2 is electrically connected to the third electrode of Q3 and the first electrode of Q4 by using the input port AC2.

Similarly, the first switching transistor in the third rectifier arm <NUM> is Q5, and the second switching transistor in the third rectifier arm <NUM> is Q6. A first electrode of Q5 is electrically connected to the output port VRECT, a second electrode of Q5 is electrically connected to the control module <NUM>, a third electrode of Q5 is electrically connected to a first electrode of Q6, a second electrode of Q6 is electrically connected to the control module <NUM>, a third electrode of Q6 is grounded, and the lead terminal L3 is electrically connected to the third electrode of Q5 and the first electrode of Q6 by using the input port AC3.

It should be noted that the wireless charging control circuit generally further includes a voltage divider resistor <NUM>.

In this embodiment, when the wireless charging system in <FIG> starts to perform wireless charging, the control module <NUM> may set Q1, Q2, Q5, and Q6 to a conducting state, and set Q3 and Q4 to a cut-off state, so that the wireless charging receive coil operates in the first operating state by default.

Then the control module <NUM> may obtain the induced voltage of the wireless charging receive coil, and compare the obtained induced voltage with the preset voltage.

If the induced voltage is not less than the preset voltage, the control module <NUM> may maintain a conducting state of Q1 and Q2, and switch Q5 and Q6 from a conducting state to a cut-off state and switch Q3 and Q4 from a cut-off state to a conducting state without interruption of wireless charging, so as to implement switching of the working rectifier arm, thereby switching the wireless charging receive coil from the first operating state to the second operating state.

It can be learned that by controlling a state of each switching transistor in each rectifier arm, an operating state of the wireless charging receive coil can be conveniently controlled in this embodiment.

It should be emphasized that a manner of controlling the operating state of the wireless charging receive coil is not limited to the foregoing manner. For example, in <FIG>, a first control switch may be disposed on a connection line between the input port AC1 and the third electrode of Q1 and the first electrode of Q2, a second control switch may be disposed on a connection line between the input port AC2 and the third electrode of Q3 and the first electrode of Q4, and a third control switch may be disposed on a connection line between the input port AC3 and the third electrode of Q5 and the first electrode of Q6. The control module <NUM> may control an on/off state of the first control switch, the second control switch, and the third control switch, to control the operating state of the wireless charging receive coil.

In view of the above, in this embodiment, a charging state of the terminal device is not fixed, and the charging state of the terminal device may be flexibly adjusted based on the induced voltage of the wireless charging receive coil, to ensure wireless charging performance of the terminal device, thereby better meeting a user requirement and achieving good user charging experience.

The following describes a wireless charging control circuit provided in the embodiments of the present disclosure.

<FIG> is a schematic structural diagram of a wireless charging control circuit according to an embodiment of the present disclosure. As shown in <FIG>, the wireless charging control circuit is applied to a terminal device, and the wireless charging control circuit includes:.

Optionally, in a case that the induced voltage is less than a preset voltage, the control module <NUM> controls the wireless charging receive coil <NUM> to operate in a first operating state; and in a case that the induced voltage is not less than the preset voltage, the control module <NUM> controls the wireless charging receive coil <NUM> to operate in a second operating state, where
an inductance value in the first operating state is greater than an inductance value in the second operating state.

The wireless charging control circuit further includes:.

An output port VRECT and M input ports are disposed in the rectifier;.

In this embodiment of the present disclosure, a wireless charging receive coil <NUM> in a wireless charging control circuit may have at least two operating states, and inductance values of the wireless charging receive coil <NUM> in the operating states are different from each other. In this way, a control module <NUM> in the wireless charging control circuit can control, based on the induced voltage of the wireless charging receive coil <NUM>, the wireless charging receive coil <NUM> to operate in a corresponding operating state. It can be learned that, in the embodiments of the present disclosure, a charging state of a terminal device is not fixed, and the charging state of the terminal device may be flexibly adjusted based on the induced voltage of the wireless charging receive coil <NUM>, to ensure wireless charging performance of the terminal device (for example, to ensure charging efficiency, a charging degree of freedom, and the like), thereby better meeting a user requirement and achieving good user charging experience.

The following describes a terminal device provided in the embodiments of the present disclosure.

An embodiment of the present disclosure provides a terminal device, and the terminal device includes the foregoing wireless charging control circuit. For a specific implementation process of the wireless charging control circuit, refer to the foregoing descriptions. This is not limited in this embodiment of the present disclosure.

Because the wireless charging control circuit has the foregoing technical effect, the terminal device that includes the wireless charging control circuit also has the corresponding technical effect.

<FIG> shows a schematic structural diagram of hardware of a terminal device <NUM> that implements the embodiments of the present disclosure. As shown in <FIG>, the terminal device <NUM> includes but is not limited to components such as a radio frequency unit <NUM>, a network module <NUM>, an audio output unit <NUM>, an input unit <NUM>, a sensor <NUM>, a display unit <NUM>, a user input unit <NUM>, an interface unit <NUM>, a memory <NUM>, a processor <NUM>, and a power supply <NUM>. It can be understood by a person skilled in the art that, the terminal device structure shown in <FIG> does not constitute any limitation on the terminal device, and the terminal device <NUM> may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements. It should be noted that the terminal device <NUM> includes a wireless charging control circuit, the wireless charging control circuit includes a wireless charging receive coil, the wireless charging receive coil has at least two operating states, and inductance values of the wireless charging receive coil in the operating states are different from each other. the processor <NUM> is configured to:.

In this embodiment of the present disclosure, a wireless charging receive coil in a wireless charging control circuit may have at least two operating states, and inductance values of the wireless charging receive coil in the operating states are different from each other. In this way, the wireless charging control circuit can control, based on the induced voltage of the wireless charging receive coil, the wireless charging receive coil to operate in a corresponding operating state. It can be learned that, in this embodiment of the present disclosure, a charging state of the terminal device <NUM> is not fixed, and the charging state of the terminal device <NUM> may be flexibly adjusted based on the induced voltage of the wireless charging receive coil, to ensure wireless charging performance of the terminal device <NUM> (for example, to ensure charging efficiency, a charging degree of freedom, and the like), thereby better meeting a user requirement and achieving good user charging experience.

The wireless charging control circuit further includes a rectifier, the rectifier includes M rectifier arms, and M is an integer greater than or equal to <NUM>; and the wireless charging receive coil has M lead terminals, and the M lead terminals are electrically connected to the M rectifier arms in one-to-one correspondence, where any two lead terminals form one terminal group, each terminal group corresponds to one inductance value, and inductance values corresponding to at least two terminal groups are different from each other; and
the processor <NUM> is specifically configured to:
set, based on the induced voltage, two rectifier arms that are electrically connected to two lead terminals in a corresponding terminal group to a conducting state, and set a remaining rectifier arm to a non-conducting state.

It should be understood that, in this embodiment of the present disclosure, the radio frequency unit <NUM> may be configured to receive and send information or a signal in a call process. Specifically, after receiving downlink data from a base station, the radio frequency unit <NUM> sends the downlink data to the processor <NUM> for processing. In addition, the radio frequency unit <NUM> sends uplink data to the base station. Generally, the radio frequency unit <NUM> includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit <NUM> may communicate with a network and another device through a wireless communication system.

The terminal provides wireless broadband Internet access for the user by using the network module <NUM>, for example, helping the user send and receive an e-mail, browse a web page, and access streaming media.

The audio output unit <NUM> may convert audio data received by the radio frequency unit <NUM> or the network module <NUM> or stored in the memory <NUM> into an audio signal and output the audio signal as a sound. In addition, the audio output unit <NUM> may further provide an audio output (for example, a call signal received voice, or a message received voice) related to a specific function implemented by the terminal device <NUM>. The audio output unit <NUM> includes a speaker, a buzzer, a telephone receiver, and the like.

The input unit <NUM> is configured to receive an audio signal or a video signal. The input unit <NUM> may include a graphics processing unit (Graphics Processing Unit, GPU) <NUM> and a microphone <NUM>, and the graphics processing unit <NUM> processes image data of a still picture or video obtained by an image capture apparatus (such as a camera) in a video capture mode or an image capture mode. A processed image frame may be displayed on the display unit <NUM>. The image frame processed by the graphics processor <NUM> may be stored in the memory <NUM> (or another storage medium) or sent by using the radio frequency unit <NUM> or the network module <NUM>. The microphone <NUM> may receive sound and can process such sound into audio data. The processed audio data may be converted, in a call mode, into a format that can be sent to a mobile communication base station by using the radio frequency unit <NUM> for output.

The terminal device <NUM> further includes at least one sensor <NUM>, such as an optical sensor, a motion sensor, and other sensors. Specifically, the optical sensor includes an ambient light sensor and a proximity sensor. The ambient light sensor may adjust luminance of the display panel <NUM> based on brightness of ambient light. The proximity sensor may turn off the display panel <NUM> and/or backlight when the terminal device <NUM> approaches an ear. As a type of the motion sensor, an accelerometer sensor may detect an acceleration value in each direction (generally, three axes), and detect a value and a direction of gravity when the accelerometer sensor is static, and may be used in an application for recognizing a mobile terminal posture (such as screen switching between landscape and portrait modes, a related game, or magnetometer posture calibration), a function related to vibration recognition (such as a pedometer or a knock), and the like. The sensor <NUM> may further include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and the like.

The display unit <NUM> is configured to display information entered by a user or information provided for a user. The display unit <NUM> may include a display panel <NUM>.

The user input unit <NUM> may be configured to receive input numeral or character information, and generate key signal input related to user setting and functional control of the terminal. Specifically, the user input unit <NUM> includes a touch panel <NUM> and another input device <NUM>. The touch panel <NUM> is also referred to as a touchscreen, and may collect a touch operation performed by a user on or near the touch panel <NUM> (such as an operation performed by a user on the touch panel <NUM> or near the touch panel <NUM> by using any proper object or accessory, such as a finger or a stylus). The touch panel <NUM> may include two parts: a touch detection apparatus and a touch controller. The touch detection apparatus detects a touch position of the user, detects a signal brought by the touch operation, and sends the signal to the touch controller. The touch controller receives touch information from the touch detection apparatus, converts the touch information into touch point coordinates, and sends the touch point coordinates to the processor <NUM>, and can receive and execute a command sent by the processor <NUM>. In addition, the touch panel <NUM> may be of a resistive type, a capacitive type, an infrared type, a surface acoustic wave type, or the like. The user input unit <NUM> may include another input device <NUM> in addition to the touch panel <NUM>. Specifically, the another input device <NUM> may include but is not limited to a physical keyboard, function keys (such as a volume control key and a switch key), a trackball, a mouse, and a joystick.

Further, the touch panel <NUM> may cover the display panel <NUM>. When detecting the touch operation on or near the touch panel <NUM>, the touch panel <NUM> transmits the touch operation to the processor <NUM> to determine a type of a touch event, and then the processor <NUM> provides corresponding visual output on the display panel <NUM> based on the type of the touch event. Although in <FIG>, the touch panel <NUM> and the display panel <NUM> are used as two independent components to implement input and output functions of the terminal, in some embodiments, the touch panel <NUM> and the display panel <NUM> may be integrated to implement the input and output functions of the mobile terminal. This is not specifically limited herein.

The interface unit <NUM> is an interface for connecting an external apparatus to the terminal device <NUM>. For example, the external apparatus may include a wired or wireless headphone port, an external power supply (or a battery charger) port, a wired or wireless data port, a storage card port, a port used to connect to an apparatus having an identity module, an audio input/output (I/O) port, a video I/O port, a headset port, and the like. The interface unit <NUM> may be configured to receive input (for example, data information and power) from an external apparatus and transmit the received input to one or more elements in the terminal device <NUM> or may be configured to transmit data between the terminal device <NUM> and an external apparatus.

The memory <NUM> may be configured to store a software program and various data. The memory <NUM> may mainly include a program storage area and a data storage area. The program storage area may store an operating system, an application required by at least one function (such as a sound play function or an image play function), and the like. The data storage area may store data (such as audio data or an address book) created based on use of the mobile phone, and the like. In addition, the memory <NUM> may include a high-speed random access memory or a nonvolatile memory, for example, at least one disk storage device, a flash memory, or another volatile solid-state storage device.

The processor <NUM> is a control center of the terminal device <NUM>, and connects all the components of the entire terminal by using various interfaces and lines. By running or executing a software program and/or a module that are stored in the memory <NUM> and by invoking data stored in the memory <NUM>, the processor <NUM> performs various functions of the terminal device <NUM> and data processing, to perform overall monitoring on the terminal device <NUM>. The processor <NUM> may include one or more processing units. Optionally, an application processor and a modem processor may be integrated into the processor <NUM>.

The application processor mainly processes an operating system, a user interface, an application, and the like, and the modem processor mainly processes wireless communication. It can be understood that, alternatively, the modem processor may not be integrated into the processor <NUM>.

The terminal device <NUM> may further include the power supply <NUM> (such as a battery) that supplies power to each component. Optionally, the power supply <NUM> may be logically connected to the processor <NUM> by using a power supply management system, so as to implement functions such as charging and discharging management, and power consumption management by using the power supply management system.

In addition, the terminal device <NUM> includes some function modules not shown, and details are not described herein.

Optionally, an embodiment of the present disclosure further provides a terminal device, including a processor <NUM>, a memory <NUM>, and a computer program that is stored in the memory <NUM> and executable on the processor <NUM>. When the processor <NUM> executes the computer program, the foregoing processes of the wireless charging control method embodiment are implemented and a same technical effect can be achieved. To avoid repetition, details are not described herein again.

An embodiment of the present disclosure further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when a processor executes the computer program, the foregoing processes of the wireless charging control method embodiment are implemented and a same technical effect can be achieved. To avoid repetition, details are not described herein again. The computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk, or an optical disc.

It should be noted that, in this specification, the terms "include", "comprise", or their any other variant is intended to cover a non-exclusive inclusion, so that a process, a method, an article, or an apparatus that includes a list of elements not only includes those elements but also includes other elements which are not expressly listed, or further includes elements inherent to such process, method, article, or apparatus. An element limited by "includes a. " does not, without more constraints, preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

Based on the foregoing descriptions of the embodiments, a person skilled in the art may clearly understand that the method in the foregoing embodiment may be implemented by software in addition to a necessary universal hardware platform or by hardware only. In most circumstances, the former is a preferred implementation manner. Based on such an understanding, the technical solutions of the present disclosure essentially or the part contributing to the related art may be implemented in a form of a software product. The computer software product is stored in a storage medium (such as a ROM/RAM, a magnetic disk, or an optical disc), and includes several instructions for instructing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, a network device, or the like) to perform the methods described in the embodiments of the present disclosure.

Claim 1:
A wireless charging control method, applied to a wireless charging control circuit in a terminal device, wherein the wireless charging control circuit comprises a wireless charging receive coil (<NUM>), the wireless charging receive coil (<NUM>) has at least two operating states, and the wireless charging receive coil (<NUM>) access the wireless charging control circuit by using different quantities of coil turns in different operating state; and
the wireless charging control method comprises:
obtaining an induced voltage of the wireless charging receive coil (<NUM>); and
controlling, based on the induced voltage, the wireless charging receive coil (<NUM>) to operate in a corresponding operating state; wherein
the wireless charging control circuit further comprises a rectifier, characterized in that the rectifier comprises M rectifier arms (<NUM>, <NUM>, <NUM>), and M is an integer greater than or equal to <NUM>; and the wireless charging receive coil (<NUM>) has M lead terminals (L1, L2, L3), and the M lead terminals (L1, L2, L3) are electrically connected to the M rectifier arms (<NUM>, <NUM>, <NUM>) in one-to-one correspondence, wherein any two lead terminals form one terminal group, each terminal group corresponds to one inductance value, and inductance values corresponding to at least two terminal groups are different from each other; and
the controlling, based on the induced voltage, the wireless charging receive coil (<NUM>) to operate in the corresponding operating state comprises:
setting, based on the induced voltage, two rectifier arms that are electrically connected to two lead terminals in a corresponding terminal group to a conducting state, and setting a remaining rectifier arm to a non-conducting state; wherein
an output port (VRECT) and M input ports (AC1, AC2, AC3) are disposed in the rectifier;
each rectifier arm (<NUM>, <NUM>,<NUM>) comprises a first switching transistor (Q1, Q3, Q5) and a second switching transistor (Q2, Q4, Q6), and the output port is grounded by using the first switching transistor (Q1, Q3, Q5) and the second switching transistor (Q2, Q4, Q6) in sequence; and the M lead terminals are electrically connected to M common terminals by using the M input ports, and each common terminal is a common terminal of the first switching transistor (Q1, Q3, Q5) and the second switching transistor (Q2, Q4, Q6) in the rectifier arm (<NUM>, <NUM>, <NUM>).