Data communication method for wireless charging and electronic device using the same

Abstract

An electronic device includes a battery, a coil, a wireless charging circuit electrically connected to the coil, a power management module configured to control the charging state of the battery by utilizing power provided from a receiving circuit, and a processor operably connected to the wireless charging circuit and the power management module, wherein the processor is configured to: request configuration information for wireless charging from an external device through the wireless charging circuit; determine whether wireless charging is possible based on a response to the request for the configuration information; when wireless charging is possible, request encrypted authentication information from the external device to perform authentication on the external device; when the external device is an unauthenticated device, request the external device to send a first predetermined power; and when the external device is an authenticated device, request the external device to send a second predetermined power higher than the first predetermined power.

Description

Technical Field

[0001] The present disclosure relates to a data communication method for wireless charging and an electronic device using the method. Background Art

[0002] Recently, wireless charging or contactless charging technology has been developed and applied to various electronic devices.

[0003] Wireless charging technology allows the battery of an electronic device to be charged without being connected to a wired charger, such as a smartphone or wearable device, by simply placing it on a charging pad or dock. Summary of the invention

[0004] Technical issues

[0005] When performing wireless charging, an authentication process of the power transmitting device or the power receiving device may be required. Through the authentication process, the power transmitting device and the power receiving device can identify the information (e.g., maximum power) supported by the other device. In the case of charging between an unauthenticated power transmitting device and a power receiving device, the devices may be damaged due to overcharging or may not be charged correctly, which may cause inconvenience to the user.

[0006] Solution to the problem

[0007] According to one aspect of the present disclosure, an electronic device is provided. The electronic device includes a battery, a coil, a wireless charging circuit electrically connected to the coil, a power management module configured to control the charging state of the battery by utilizing power provided from a receiving circuit, and a processor operably connected to the wireless charging circuit and the power management module, wherein the processor is configured to: request configuration information for wireless charging from an external device through the wireless charging circuit; determine whether wireless charging is possible based on a response to the request for configuration information; when wireless charging is possible, request encrypted authentication information from the external device to perform authentication on the external device; when the external device is an unauthenticated device, request the external device to send a first predetermined power; and when the external device is an authenticated device, request the external device to send a second predetermined power higher than the first predetermined power.

[0008] According to another aspect of the present disclosure, an electronic device is provided. The electronic device includes a battery, a coil, a wireless charging circuit electrically connected to the coil, a power management module configured to control the charging state of the battery by utilizing a voltage provided from the wireless charging circuit, and a processor operably connected to the wireless charging circuit and the power management module, wherein the processor is configured to: request configuration information for wireless charging from an external device through the wireless charging circuit; determine whether the external device is capable of wireless charging based on a response to the request for configuration information; when wireless charging is capable, request identification information of the external device from the external device to determine whether the external device is capable of sending a second predetermined voltage higher than the first predetermined voltage; based on determining that the external device is capable of sending the second predetermined voltage, request encrypted authentication information related to the second predetermined voltage from the external device; perform authentication for the external device based on a response to the encrypted authentication information request; and based on the result of the authentication, when the external device is an authenticated device, request the external device to send the second predetermined voltage.

[0009] According to another aspect of the present disclosure, a wireless charging transmitter is provided. The wireless charging transmitter includes a coil, a wireless charging circuit electrically connected to the coil, and a controller operably connected to the wireless charging circuit, wherein the controller is configured to: when the controller receives a request for wireless charging from a wireless charging receiver, send configuration information to the wireless charging receiver; when the wireless charging receiver receives identification information as a response to the sending of the configuration information, send identification information including information about the maximum transmittable wireless power; receive a request for encrypted authentication information as a response to the sending of the identification information from the wireless charging receiver; send encrypted authentication information in response to the request for the encrypted authentication information; when the wireless charging receiver sends an authentication completion message as a response to the sending of the encrypted authentication information, send a second predetermined power to the wireless charging receiver; and when the wireless charging receiver sends an authentication failure message as a response to the sending of the encrypted authentication information, send a first predetermined power lower than the second predetermined power to the wireless charging receiver.

[0010] According to another aspect of the present disclosure, a method for wirelessly charging an electronic device is provided. The method includes: requesting configuration information for wireless charging from an external device through a wireless charging circuit to determine whether wireless charging is possible; when wireless charging is possible, requesting encrypted authentication information from the external device to perform authentication for the external device; when the external device is an unauthenticated device, requesting the external device to send a first predetermined power; and when the external device is an authenticated device, requesting the external device to send a second predetermined power higher than the first predetermined power.

[0011] Beneficial Effects of the Invention

[0012] One aspect of the present disclosure provides a data communication method for wireless charging and an electronic device using the method, which can wirelessly charge an authenticated device at a predetermined power through encryption authentication between a power transmitting device and a power receiving device, reduce damage to the battery caused by overcharging, and perform wireless charging faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The foregoing and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent from the following description in conjunction with the accompanying drawings, in which:

[0014] Figure 1 is a block diagram of an electronic device in a network environment according to an embodiment;

[0015] Figure 2 is a block diagram of a power management module and a battery according to an embodiment;

[0016] Figure 3 is a diagram of a wireless charging system according to an embodiment;

[0017] Figure 4 is a block diagram of a wireless charging system according to an embodiment;

[0018] Figure 5 is a signal flow diagram of a process for authenticating an electronic device according to an embodiment;

[0019] Figure 6 is a flowchart of a method for executing different power transmission / reception modes based on an authentication level of an electronic device according to an embodiment;

[0020] Fig. 7A is a signal flow diagram of the operation of a wireless charging system according to an embodiment;

[0021] Figure 7B is a signal flow diagram of the operation of a wireless charging system according to an embodiment; and

[0022] Figure 8 is a signal flow graph of the operation in case of encryption authentication failure. DETAILED DESCRIPTION

[0023] Figure 1 1 is a block diagram illustrating an electronic device 101 in a network environment 100 according to various embodiments. Figure 1, the electronic device 101 in the network environment 100 may communicate with the electronic device 102 via the first network 198 (e.g., a short-range wireless communication network), or communicate with the electronic device 104 or the server 108 via the second network 199 (e.g., a long-range wireless communication network). According to an embodiment, the electronic device 101 may communicate with the electronic device 104 via the server 108. According to an embodiment, the electronic device 101 may include a processor 120, a memory 130, an input device 150, a sound output device 155, a display device 160, an audio module 170, a sensor module 176, an interface 177, a haptic module 179, a camera module 180, a power management module 188, a battery 189, a communication module 190, a user identification module (SIM) 196, or an antenna module 197. In some embodiments, at least one of the components (e.g., the display device 160 or the camera module 180) may be omitted from the electronic device 101, or one or more other components may be added to the electronic device 101. In some embodiments, some of the components may be implemented as a single integrated circuit.For example, the sensor module 176 (eg, a fingerprint sensor, an iris sensor, or an illumination sensor) may be implemented to be embedded in the display device 160 (eg, a display).

[0024] The processor 120 may run, for example, software (e.g., program 140) to control at least one other component (e.g., hardware component or software component) of the electronic device 101 connected to the processor 120, and may perform various data processing or calculations. According to one embodiment, as at least part of the data processing or calculation, the processor 120 may load a command or data received from another component (e.g., sensor module 176 or communication module 190) into the volatile memory 132, process the command or data stored in the volatile memory 132, and store the resultant data in the non-volatile memory 134. According to an embodiment, the processor 120 may include a main processor 121 (e.g., a central processing unit (CPU) or an application processor (AP)) and an auxiliary processor 123 (e.g., a graphics processing unit (GPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that is independent of or combined with the main processor 121 in operation. Additionally or alternatively, the auxiliary processor 123 may be adapted to consume less power than the main processor 121, or adapted to be specifically used for a specified function. The auxiliary processor 123 may be implemented separately from the main processor 121 , or as part of the main processor 121 .

[0025] When the main processor 121 is in an inactive (e.g., sleep) state, the auxiliary processor 123 may control at least some of the functions or states related to at least one component (e.g., display device 160, sensor module 176, or communication module 190) among the components of the electronic device 101 (not the main processor 121), or when the main processor 121 is in an active state (e.g., running an application), the auxiliary processor 123 may control at least some of the functions or states related to at least one component (e.g., display device 160, sensor module 176, or communication module 190) among the components of the electronic device 101 together with the main processor 121. According to an embodiment, the auxiliary processor 123 (e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., camera module 180 or communication module 190) that is functionally related to the auxiliary processor 123.

[0026] The memory 130 may store various data used by at least one component of the electronic device 101 (e.g., the processor 120 or the sensor module 176). The various data may include, for example, software (e.g., the program 140) and input data or output data for commands related thereto. The memory 130 may include a volatile memory 132 or a nonvolatile memory 134.

[0027] The program 140 may be stored as software in the memory 130 , and may include, for example, an operating system (OS) 142 , middleware 144 , or applications 146 .

[0028] The input device 150 may receive commands or data from outside the electronic device 101 (e.g., a user) to be used by other components of the electronic device 101 (e.g., the processor 120). The input device 150 may include, for example, a microphone, a mouse, a keyboard, or a digital pen (e.g., a stylus).

[0029] The sound output device 155 can output a sound signal to the outside of the electronic device 101. The sound output device 155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as playing multimedia or playing records, and the receiver can be used for incoming calls. Depending on the embodiment, the receiver can be implemented as a separate part from the speaker, or as a part of the speaker.

[0030] The display device 160 may visually provide information to the outside of the electronic device 101 (e.g., a user). The display device 160 may include, for example, a display, a holographic device, or a projector, and a control circuit for controlling a corresponding one of the display, the holographic device, and the projector. According to an embodiment, the display device 160 may include a touch circuit adapted to detect a touch or a sensor circuit (e.g., a pressure sensor) adapted to measure the strength of a force caused by a touch.

[0031] The audio module 170 may convert sound into an electrical signal, or vice versa. According to an embodiment, the audio module 170 may obtain sound via the input device 150, or output sound via the sound output device 155 or an earphone of an external electronic device (e.g., electronic device 102) directly (e.g., wired) or wirelessly connected to the electronic device 101.

[0032] The sensor module 176 may detect an operating state (e.g., power or temperature) of the electronic device 101 or an environmental state (e.g., a state of a user) outside the electronic device 101, and then generate an electrical signal or data value corresponding to the detected state. According to an embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illumination sensor.

[0033] The interface 177 may support one or more specific protocols to be used to connect the electronic device 101 directly (e.g., wired) or wirelessly to an external electronic device (e.g., the electronic device 102). According to an embodiment, the interface 177 may include, for example, a high-definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface.

[0034] The connection end 178 may include a connector, wherein the electronic device 101 can be physically connected to an external electronic device (e.g., the electronic device 102) via the connector. According to an embodiment, the connection end 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0035] The haptic module 179 may convert the electrical signal into mechanical stimulation (eg, vibration or motion) or electrical stimulation that can be recognized by the user via his sense of touch or kinesthetic sense. According to an embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulator.

[0036] The camera module 180 may capture still images or moving images. According to an embodiment, the camera module 180 may include one or more lenses, an image sensor, an image signal processor, or a flash.

[0037] The power management module 188 may manage power supply to the electronic device 101. According to an embodiment, the power management module 188 may be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

[0038] The battery 189 may power at least one component of the electronic device 101. According to an embodiment, the battery 189 may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0039] The communication module 190 may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device 101 and an external electronic device (e.g., electronic device 102, electronic device 104, or server 108), and perform communication via the established communication channel. The communication module 190 may include one or more communication processors capable of operating independently from the processor 120 (e.g., an application processor (AP)) and supporting direct (e.g., wired) communication or wireless communication. According to an embodiment, the communication module 190 may include a wireless communication module 192 (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (e.g., a local area network (LAN) communication module or a power line communication (PLC) module). A corresponding one of these communication modules can communicate with an external electronic device via a first network 198 (e.g., a short-range communication network such as Bluetooth, Wireless Fidelity (Wi-Fi) Direct, or Infrared Data Association (IrDA)) or a second network 199 (e.g., a long-range communication network such as a cellular network, the Internet, or a computer network (e.g., a LAN or a wide area network (WAN))). These various types of communication modules can be implemented as a single component (e.g., a single chip), or these various types of communication modules can be implemented as multiple components separated from each other (e.g., multiple chips). The wireless communication module 192 can identify and authenticate the electronic device 101 in a communication network (such as the first network 198 or the second network 199) using user information (e.g., an International Mobile Subscriber Identity (IMSI)) stored in the user identification module 196.

[0040] The antenna module 197 may transmit or receive a signal or power to or from the outside of the electronic device 101 (e.g., an external electronic device). According to an embodiment, the antenna module 197 may include an antenna including a radiating element formed of a conductive material or a conductive pattern formed in or on a substrate (e.g., a PCB). According to an embodiment, the antenna module 197 may include a plurality of antennas. In this case, at least one antenna suitable for a communication scheme used in a communication network (such as the first network 198 or the second network 199) may be selected from the plurality of antennas by, for example, the communication module 190 (e.g., the wireless communication module 192). A signal or power may then be transmitted or received between the communication module 190 and the external electronic device via the selected at least one antenna. According to an embodiment, another component (e.g., a radio frequency integrated circuit (RFIC)) other than the radiating element may be additionally formed as a part of the antenna module 197.

[0041] At least some of the above components may be connected to each other via an inter-peripheral communication scheme (e.g., a bus, a general purpose input output (GPIO), a serial peripheral interface (SPI), or a mobile industry processor interface (MIPI)) and communicatively transmit signals (e.g., commands or data) therebetween.

[0042] According to an embodiment, a command or data may be sent or received between the electronic device 101 and the external electronic device 104 via the server 108 connected to the second network 199. Each of the electronic device 102 and the electronic device 104 may be a device of the same type as the electronic device 101, or a device of a different type from the electronic device 101. According to an embodiment, all or some operations to be executed in the electronic device 101 may be executed in one or more of the external electronic device 102, the external electronic device 104, or the server 108. For example, if the electronic device 101 should automatically execute a function or service or should execute a function or service in response to a request from a user or another device, the electronic device 101 may request the one or more external electronic devices to execute at least part of the function or service instead of executing the function or service, or the electronic device 101 may request the one or more external electronic devices to execute at least part of the function or service in addition to executing the function or service. The one or more external electronic devices that receive the request may execute the requested at least part of the function or service, or execute another function or another service related to the request, and transmit the result of the execution to the electronic device 101. The electronic device 101 may provide the result as at least a partial reply to the request with or without further processing the result. To this end, for example, cloud computing technology, distributed computing technology, or client-server computing technology may be used.

[0043] Figure 2 2 is a block diagram 200 illustrating the power management module 188 and the battery 189 according to various embodiments. Figure 2 , the power management module 188 may include a charging circuit 210, a power conditioner 220, or a power meter 230. The charging circuit 210 may charge the battery 189 by using power supplied from an external power source outside the electronic device 101. According to an embodiment, the charging circuit 210 may select a charging scheme (e.g., normal charging or fast charging) based at least in part on the type of the external power source (e.g., a power outlet, USB, or wireless charging), a power value that can be provided from the external power source (e.g., about 20 watts or more), or a property of the battery 189, and may charge the battery 189 using the selected charging scheme. The external power source may be directly connected to the electronic device 101 via the connection terminal 178, for example, or wirelessly connected to the electronic device 101 via the antenna module 197.

[0044] The power regulator 220 can generate a variety of power with different voltage levels or different current levels by adjusting the voltage level or current level of the power supplied from the external power source or the battery 189. The power regulator 220 can adjust the voltage level or current level of the power supplied from the external power source or the battery 189 to different voltage levels or current levels suitable for each of some components included in the electronic device 101. According to an embodiment, the power regulator 220 can be implemented in the form of a low dropout (LDO) regulator or a switching regulator. The power meter 230 can measure the use status information about the battery 189 (for example, the capacity of the battery 189, the number of times of charging or discharging, the voltage or the temperature).

[0045] The power management module 188 may use, for example, the charging circuit 210, the power conditioner 220, or the power meter 230 to determine charging status information related to the charging of the battery 189 (e.g., life, overvoltage, low voltage, overcurrent, overcharge, overdischarge, overheat, short circuit, or expansion) based at least in part on the measured usage status information about the battery 189. The power management module 188 may determine whether the state of the battery 189 is normal or abnormal based at least in part on the determined charging status information. If the state of the battery 189 is determined to be abnormal, the power management module 188 may adjust the charging of the battery 189 (e.g., reduce the charging current or voltage, or stop charging). According to an embodiment, at least some of the functions of the power management module 188 may be performed by an external control device (e.g., the processor 120).

[0046] According to an embodiment, the battery 189 may include a protection circuit module (PCM) 240. The PCM 240 may perform one or more of various functions (e.g., a pre-cutoff function) for preventing performance deterioration or damage of the battery 189. Additionally or alternatively, the PCM 240 may be configured as at least a portion of a battery management system (BMS), wherein the BMS is capable of performing various functions including cell balancing, measurement of battery capacity, counting of the number of times of charging or discharging, measurement of temperature, or measurement of voltage.

[0047] According to an embodiment, at least a portion of the charging state information or the usage state information about the battery 189 may be measured using a corresponding sensor (e.g., a temperature sensor) of the sensor module 176, the power meter 230, or the power management module 188. According to an embodiment, the corresponding sensor (e.g., a temperature sensor) of the sensor module 176 may be included as a part of the PCM 240, or may be arranged near the battery 189 as a separate device.

[0048] Figure 3 is a diagram of a wireless charging system 300 according to an embodiment.

[0049] Reference Figure 3 , the wireless charging system 300 may include an electronic device 301 such as a portable terminal (eg, the electronic device 101 ), or an external electronic device 302 such as a wireless charging pad (eg, the external electronic device 102 ).

[0050] The electronic device 301 can be placed on a board of the external electronic device 302 to perform wireless charging. For example, the external electronic device 302 can be a device that supports a general wireless charging mode, a fast wireless charging mode, or a faster wireless charging mode. The fast wireless charging mode disclosed in the present disclosure (e.g., the power receiving device receives approximately 7 watts (W) to 8 W of power) may refer to a wireless charging scheme having a faster charging speed and a larger amount of wireless transmission power than a general wireless charging mode (e.g., the power receiving device receives approximately 3.0 W to 5 W of power). The faster wireless charging mode disclosed in the present disclosure (e.g., the power receiving device receives approximately 11 W to 12 W of power) may refer to a wireless charging scheme having a faster charging speed and a larger amount of wireless transmission power than a fast wireless charging mode.

[0051] The electronic device 301 may determine whether the external electronic device 302 is a device that supports the faster wireless charging mode. If the external electronic device 302 is a device that supports the faster wireless charging mode, the electronic device 301 may at least exchange encrypted authentication information with the external electronic device 302 to perform an authentication procedure. Although the external electronic device 302 is a device that supports the faster wireless charging mode, the electronic device 301 may be controlled to perform wireless charging in the faster wireless charging mode only if at least one piece of encrypted authentication information received from the external electronic device 302 is valid. For example, if at least one piece of encrypted authentication information received from the external electronic device 302 is invalid, the electronic device 301 may be controlled to perform wireless charging in the general wireless charging mode or the fast wireless charging mode.

[0052] Regarding the wireless charging system 300, through encrypted authentication between a power transmitting device (e.g., an external electronic device 302) and a power receiving device (e.g., the electronic device 301), only authenticated devices can be wirelessly charged using predetermined power, which can reduce damage to the battery due to overcharging and can perform wireless charging faster.

[0053] According to an embodiment, an electronic device may include a battery, a coil, a wireless charging circuit electrically connected to the coil, a power management module configured to control a charging state of the battery by utilizing power provided from a receiving circuit, and a processor operably connected to the wireless charging circuit and the power management module, wherein the processor: requests configuration information for wireless charging from an external device through the wireless charging circuit; determines whether wireless charging is possible based on a response to the request; if wireless charging is possible, requests encrypted authentication information from the external device to perform authentication on the external device; if the external device is an unauthenticated device, requests the external device to send a first predetermined power; and if the external device is an authenticated device, requests the external device to send a second predetermined power higher than the first predetermined power.

[0054] When determining whether wireless charging is possible, the processor may request identification information from an external device, receive identification information of the external device from the external device, and determine whether the external device is a device that can send a first predetermined power at a maximum or a device that can send a second predetermined power based on the identification information of the external device. If the external device can send the second predetermined power at a maximum, the processor may request encrypted authentication information from the external device, and if the external device can send the first predetermined power at a maximum, the processor may request the external device to send the first predetermined power. The processor may send a request for the first predetermined power to the external device based on the identification information of the external device, charge the battery based on the sending of the first predetermined power by the external device, and request encrypted authentication information from the external device while charging the battery based on the sending of the first predetermined power. The processor may determine whether wireless charging is possible based on the configuration information of the external device, and if wireless charging is possible, the processor may determine whether the external device can perform fast wireless charging based on the identification information of the external device. The electronic device may also include an encryption authentication module for performing authentication. The encryption authentication module may be embedded in the processor.

[0055] According to an embodiment, an electronic device may include a battery, a coil, a wireless charging circuit electrically connected to the coil, a power management module configured to control the charging state of the battery by using a voltage provided from the wireless charging circuit, and a processor operably connected to the wireless charging circuit and the power management module, wherein the processor: requests configuration information for wireless charging from an external device through the wireless charging circuit; determines whether the external device is capable of wireless charging based on a response to the request; if wireless charging is capable, requests identification information of the external device from the external device to determine whether the external device is capable of sending a second predetermined power higher than the first predetermined power; based on the determination result, requests encrypted authentication information associated with the second predetermined power from the external device to perform authentication for the external device based on a response to the encrypted authentication information request; and based on the result of the authentication, if the external device is an authenticated device, requests the external device to send the second predetermined power. If the external device is an unauthenticated device, the processor may request the external device to send the first predetermined power. The electronic device may also include an encryption authentication module for performing authentication. The encryption authentication module may be embedded in the processor.

[0056] According to an embodiment, a wireless charging transmitter may include a coil, a wireless charging circuit electrically connected to the coil, and a controller operably connected to the wireless charging circuit, wherein the controller is configured to: if the controller receives a request for wireless charging from a wireless charging receiver, send configuration information to the wireless charging receiver; if the wireless charging receiver requests the configuration information as a response to sending the configuration information, send identification information including information about the maximum transmittable wireless power; receive a request for encrypted authentication information as a response to sending the identification information from the wireless charging receiver; send encrypted authentication information in response to the request for encrypted authentication information; if the wireless charging receiver sends an authentication completion message as a response to sending the encrypted authentication information, send a second predetermined power to the wireless charging receiver; and if the wireless charging receiver sends an authentication failure message as a response to sending the encrypted authentication information, send a first predetermined power lower than the second predetermined power to the wireless charging receiver. The maximum transmittable wireless power may be the first predetermined power or the second predetermined power. The controller may be configured to receive a request for encrypted authentication information from the wireless charging receiver based on sending the maximum transmittable wireless power as the second predetermined power. If the maximum transmittable wireless power is the first predetermined power, the controller sends a command to the wireless charging receiver for configuring the transmit power to be the first predetermined power. The controller may be configured to receive a request for encrypted authentication information while transmitting the first predetermined power to the wireless charging receiver, and transmit the encrypted authentication information in response to the request.

[0057] Figure 4is a block diagram of a wireless charging system 300 according to an embodiment.

[0058] Reference Figure 4 , an external electronic device 302 (e.g., a power transmitting device) can wirelessly supply power to an electronic device 301 (e.g., a power receiving device). The electronic device 302 can be a wireless power transmitter or an electronic device operating in a power transmitting mode (e.g., the same electronic device as the electronic device 101).

[0059] The power transmission device 302 may include a power transmission circuit 311 , a control circuit 312 , a communication circuit 313 , or a sensing circuit 314 .

[0060] The power transmitting circuit 311 may include: a power adapter 311a that receives power (or electricity) input from the outside and appropriately converts the voltage of the input power; a power generating circuit 311b that generates power; or a matching circuit 311c that maximizes the efficiency between the transmitting coil 311L and the receiving coil 321L.

[0061] The power transmission circuit 311 may include at least some elements of a power adapter 311a, a power generation circuit 311b, a transmitting coil 311L, or a matching coil 311c to enable power to be transmitted to multiple power receiving devices (eg, a first external electronic device and a second external electronic device).

[0062] The control circuit 312 may perform overall control of the power transmission device 302, and generate various messages required for wireless power transmission to transmit the generated messages to the communication circuit 313. The control circuit 312 may calculate the power (or amount) to be transmitted to the power receiving device 301 based on the information received from the communication circuit 313. The control circuit 312 may control the power transmission circuit 311 so that the power generated by the transmission coil 311L is transmitted to the power receiving device 301.

[0063] The communication circuit 313 may include at least one of a first communication circuit 313a or a second communication circuit 313b. For example, the first communication circuit 313a may communicate with the first communication circuit 323a of the power receiving device 301 by using a frequency that is the same as or close to the frequency used by the transmitting coil 311L for power transmission.

[0064] The first communication circuit 313a can communicate with the first communication circuit 323a using the transmitting coil 311L. The data (or communication signal) generated by the first communication circuit 313a can be transmitted using the transmitting coil 311L. The first communication circuit 313a can transmit data to the power receiving device 301 by using a frequency shift keying (FSK) modulation technique. The first communication circuit 313a can communicate with the first communication circuit 323a of the power receiving device 301 by changing the frequency of the power signal transmitted by the transmitting coil 311L. Alternatively, the first communication circuit 313a can communicate with the first communication circuit 323a of the power receiving device 301 by including data in the power signal generated by the power generating circuit 311b. For example, the first communication circuit 313a can represent data by increasing or decreasing the frequency of the power transmission signal.

[0065] For example, the second communication circuit 313b can communicate with the second communication circuit 323b of the power receiving device 301 by using a frequency different from the frequency used by the transmitting coil 311L for power transmission (e.g., an out-of-band scheme). For example, the second communication circuit 313b can use one of various short-range communication schemes such as Bluetooth, Bluetooth Low Energy (BLE), Wireless Fidelity (Wi-Fi), and Near Field Communication (NFC) to obtain information related to the charging state (e.g., rectified voltage value, rectified voltage value (e.g., Vrec) information, information about current flow in a coil or a rectifying circuit (e.g., Iout), various data packets, and / or messages) from the second communication circuit 323b.

[0066] The sensing circuit 314 may include at least one sensor, and may detect at least one state of the power transmission device 301 by using the at least one sensor.

[0067] The sensing circuit 314 may include at least one of a temperature sensor, a motion sensor, or a current (or voltage) sensor. The temperature state of the power transmitting device 302 may be detected by using the temperature sensor, the motion state of the power transmitting device 302 may be detected by using the motion sensor, and the state of the output signal of the power transmitting device 302 (for example, current magnitude, voltage magnitude, or power magnitude) may be detected by using the current (or voltage) sensor.

[0068] The current (or voltage) sensor may measure a signal in the power transmission circuit 311. The current (or voltage) sensor may measure a signal in at least a portion of the matching circuit 311c or the power generation circuit 311b. For example, the current (or voltage) sensor may include a circuit for measuring a signal at the front end of the coil 311L.

[0069] The sensing circuit may be a circuit for foreign object detection (FOD).

[0070] The power receiving device 301 (e.g., the electronic device 101) may include a power receiving circuit 321 (e.g., a power management module 188), a control circuit 322 (e.g., a processor 120), a communication circuit 323 (e.g., a communication module 190), at least one sensor 324, a display 325, or a sensing circuit 326. With respect to the power receiving device 301, a description of a configuration corresponding to the power transmitting device 302 may be partially omitted.

[0071] The power receiving circuit 321 may include a receiving coil 321L that wirelessly receives power from the power transmitting device 302, a matching circuit 321a, a rectifier circuit 321b that rectifies the received alternating current (AC) power into direct current (DC), a regulating circuit 321c that regulates the charging voltage, a switching circuit 321d, or a battery 321e.

[0072] The control circuit 322 may perform overall control of the power transmission device 301 , and generate various messages required for wireless power transmission to transmit the generated messages to the communication circuit 323 .

[0073] The communication circuit 323 may include at least one of a first communication circuit 323a and a second communication circuit 323b. The first communication circuit 323a may communicate with the power transmission device 302 through the receiving coil 321L.

[0074] The first communication circuit 323a can communicate with the first communication circuit 313a by using the receiving coil 321L. The receiving coil 321L can be used to send the data (or communication signal) generated by the first communication circuit 323a. The first communication circuit 323a can send data to the power transmission device 302 by using the amplitude shift keying (ASK) modulation technique. The second communication circuit 323b can communicate with the power transmission device 302 using one of various short-range communication schemes such as Bluetooth, BLE, Wi-Fi, or NFC.

[0075] The at least one sensor 324 may include at least some of a current / voltage sensor, a temperature sensor, an illumination sensor, or an acceleration sensor.

[0076] The display 325 may display various display information required for wireless power transmission and reception.

[0077] The sensing circuit 326 can detect the power transmission device 302 by detecting the search signal or power received from the power transmission device 302. The sensing circuit 326 can detect a signal change of the input / output terminal of the coil 321L, the matching circuit 321a, or the rectifier circuit 321b, which is caused by the signal of the coil 321L, which is a signal generated from the signal output from the power transmission device 302. The sensing circuit 326 may be included in the receiving circuit 321.

[0078] Figure 5 is a signal flow diagram 500 associated with a process of authenticating an electronic device according to an embodiment.

[0079] Reference Figure 5 , showing the process of sending or receiving authentication data between the authentication initiator 501 and the authentication responder 503. Generally, an electronic device 101 such as a portable terminal can be the authentication initiator 501, and an external electronic device 102 such as a wireless charging pad can be the authentication responder 503. Conversely, it can be established as an exception. For example, an electronic device 101 such as a portable terminal can be the authentication responder 503, and an external electronic device 102 such as a wireless charging pad can be the authentication initiator 501. The following is an example in which the electronic device 101 such as a portable terminal is the authentication initiator 501, and the external electronic device 102 such as a wireless charging pad is the authentication responder 503.

[0080] In step 510, the authentication initiator 501 (e.g., an electronic device) may request the authentication responder 503 (e.g., a wireless charging pad) for identification information and / or configuration information related to wireless charging. For example, the identification information may include version information, a manufacturing code, or a basic device identifier. The configuration information may include, for example, wireless charging frequency, maximum chargeable power, required charging amount, or average transmission power.

[0081] In step 520, the authentication responder 503 may send identification information and / or configuration information to the authentication initiator 501. The authentication responder 503 may generate a power transmission protocol for charging with the authentication initiator 501 based at least in part on the received identification information and / or configuration information. For example, the power transmission protocol may include restrictions on parameters that determine power transmission characteristics in the power transmission state. The restrictions may include version information of the power transmission protocol, identification information of the authentication responder 503 or the manufacturer, power level, expected maximum power information, option configuration, average time information of received power, or a method for determining the current of the main battery of the authentication responder 503.

[0082] The request direction of identification information and configuration information may be opposite to the above example. For example, the authentication responder 503 may send identification or configuration information to the authentication initiator 501, and then the authentication initiator 501 may request to change the charging power based on the received configuration information. As another example, in the case of fast charging, the authentication initiator 501 may request identification or configuration information from the authentication responder 503, the authentication initiator 501 may make a request to control the power based on the information, and the authentication responder 503 may configure (change) the power according to the request. As another example, after the authentication responder 503 sends identification or configuration information, the authentication initiator 501 may request power control in response to the sent information, and the authentication responder 503 may configure (change) the power.

[0083] In step 530, the authentication initiator 501 may determine whether wireless charging is possible based on the identification information and / or configuration information related to wireless charging obtained from the authentication responder 503. The authentication initiator 501 may determine that wireless charging is possible, thereby completing the first authentication.

[0084] In step 540 , the authentication initiator 501 may request the authentication responder 503 for a second authentication as an encrypted authentication for faster wireless charging.

[0085] The identification information may be encrypted based on a predetermined encryption scheme between the authentication initiator 501 and the authentication responder 503. For example, the identification information may be implemented as an anonymous data packet.

[0086] The signal for requesting anonymous identification information and / or the response signal may be encrypted based on a predetermined encryption scheme between the authentication initiator 501 and the authentication responder 503. For example, the response signal may be generated as an anonymous data packet. The authentication initiator 501 may generate anonymous identification information by encrypting the identification information using a predetermined encryption scheme, and send the anonymous identification information to the authentication responder 503. For example, the authentication initiator 501 may encrypt the identification information by using various schemes, and send the encrypted identification information to the authentication responder 503. The authentication initiator 501 encrypts and sends the identification information to prevent other electronic devices from recognizing the identification information, thereby improving security.

[0087] The authentication initiator 501 may send or receive data related to the anonymous identification information and receive wireless power in the changed charging mode. For example, the authentication initiator 501 may receive power and control the battery to charge in the charging mode corresponding to the anonymous identification information (e.g., a faster wireless charging mode). Different from the above example, the operation order and direction between the authentication initiator 501 and the authentication responder 503 may be changed.

[0088] The authentication initiator 501 may send a signal for requesting anonymous identification information (including an encrypted one-time random number) to the authentication responder 503 .

[0089] The anonymous identification information may be encrypted data associated with the ID and the power mode change. The anonymous identification information disclosed herein may include an encrypted one-time random number, such as one-time data (instant and one-time data) generated using a one-time random number.

[0090] The authentication initiator 501 may request the authentication responder 503 to transmit a certificate chain. The certificate chain may include public authentication message information corresponding to each of the root authority providing the security system for authentication, the manufacturer authenticated by the corresponding root authority, and the individual products of the corresponding manufacturer (e.g., a wireless charging pad). Through the encryption of the authentication security system, the individual public authentication message can form a unique pairing with the private authentication message. The private authentication message can be used in the process of encrypting or decrypting the message data in a pair of electronic devices to be authenticated (e.g., a power transmitter and a power receiver). The certificate chain may include information related to the public authentication message (e.g., information about the root authority providing the security system for authentication, the manufacturer authenticated by the corresponding root authority, or the individual products of at least one corresponding manufacturer). Such a certificate chain can be paired with a private authentication message corresponding to the public authentication message. As described above, due to the large amount of data in the certificate chain required for wireless charging authentication, it is necessary to involve distributed transmission of data related to wireless charging authentication.

[0091] In step 550, in response to the second authentication request, the authentication responder 503 may transmit the certificate chain to the authentication initiator 501. For example, the authentication responder 503 may send information about the certificate chain to the authentication initiator 501 by using a start tag and an end tag, by dividing the data related to the wireless charging authentication.

[0092] In step 560, the authentication initiator 501 may verify whether the received certificate chain is valid. For example, if the certificate chain is invalid, the authentication initiator 501 may determine that the second authentication has failed, and may receive low power (e.g., first predetermined power) provided from the authentication responder 503. Thus, a general wireless charging mode or a fast wireless charging mode may be performed. If the certificate chain is valid, the authentication initiator 501 may receive power (e.g., high power (second predetermined power)) provided from the authentication responder 503. Thus, the authentication initiator 501 may perform a faster wireless charging mode.

[0093] Figure 6 is a flowchart 600 associated with a method of executing different power transmission / reception modes based on an authentication level of an electronic device according to an embodiment.

[0094] Reference Figure 6 In step 610, the electronic device 101 (e.g., a portable terminal) and the external electronic device 102 (e.g., a wireless charging pad) may determine whether the first authentication for wireless charging is completed. For example, the electronic device 101 may request identification information and / or configuration information related to wireless charging from the external electronic device 102, and may determine whether to perform wireless charging based on the identification information and / or configuration information related to wireless charging obtained from the external electronic device 102 in response to the request. The electronic device 101 may complete the first authentication by determining that wireless charging can be performed with the external electronic device 102. The process of performing the first authentication in step 610 may be similar to the process of performing the first authentication in step 610. Figure 5 Steps 510 to 530 are the same or similar.

[0095] If the first authentication for wireless charging is completed (for example, the determination result of step 610 is yes), the electronic device 101 and the external electronic device 102 may branch to step 620 to start the first wireless charging mode corresponding to the general wireless charging mode or the fast wireless charging mode. For example, the electronic device 101 may request the external electronic device 102 to transmit the first predetermined power.

[0096] In step 630 , the electronic device 101 may additionally request the external electronic device 102 to perform a second authentication for faster wireless charging.

[0097] In step 630, the electronic device 101 may determine whether to perform the second authentication based on the identification information obtained in steps 610 and 620. For example, the electronic device 101 may determine whether the external electronic device 102 is a device capable of transmitting the first predetermined power at maximum or a device capable of transmitting the second predetermined power based on the identification information. Since the second predetermined power is, for example, power that supports faster wireless charging, if the external electronic device 102 transmits identification information capable of transmitting the second predetermined power, the electronic device 101 may additionally require the second authentication to be performed before transmitting the second predetermined power. If the second authentication fails, although the external electronic device 102 includes identification information capable of transmitting the second predetermined power, the electronic device 101 may transmit a command to the external electronic device 102 for transmitting the first predetermined power lower than the second predetermined power. As a result obtained by identifying the identification information, if the external electronic device 102 is a device that can transmit the first predetermined power at maximum, the electronic device 101 may bypass the second authentication process and transmit a command to the external electronic device 102 for transmitting the first predetermined power.

[0098] The electronic device 101 may send a signal, for example, for requesting anonymous identification information as information required to perform faster wireless charging to the external electronic device 102. The identification information may be encrypted based on a predetermined encryption scheme between the authentication initiator 501 and the authentication responder 503. For example, the identification information may be implemented as an anonymous data packet. If the external electronic device 102 sends an anonymous data packet as a response to the signal for requesting anonymous identification information, the electronic device 101 may determine whether the anonymous data packet includes predefined information, and if the anonymous data packet includes the predefined information, the electronic device 101 may determine that the second authentication for performing faster wireless charging is completed.

[0099] The electronic device 101 may request the external electronic device 102 to transmit a certificate chain. If the electronic device 101 receives the certificate chain from the external electronic device 102, the electronic device 101 may verify whether the certificate chain is valid. For example, if the certificate chain is invalid, the electronic device 101 may determine that the second authentication has failed. If the certificate chain is valid, the electronic device 101 may determine that the second authentication is complete.

[0100] The process of performing the second authentication in step 630 can be the same as Figure 5 Steps 540 to 560 are shown to be the same or similar.

[0101] If the second authentication for faster wireless charging is completed (for example, the determination result of step 630 is yes), the electronic device 101 and the external electronic device 102 may branch to step 640 to start the second wireless charging mode corresponding to the faster wireless charging mode. For example, the electronic device 101 may request the external electronic device 102 to transmit a second predetermined power higher than the first predetermined power supported by the first wireless charging mode.

[0102] If the second authentication for faster wireless charging fails (for example, the determination result of step 630 is no), the electronic device 101 and the external electronic device 102 may branch to step 620 to start the first wireless charging mode corresponding to the general wireless charging mode or the fast wireless charging mode, and then terminate the authentication. For example, the electronic device 101 may request the external electronic device 102 to transmit a first predetermined power of relatively low power.

[0103] According to an embodiment, a method for wirelessly charging an electronic device may include: requesting configuration information for wireless charging from an external device through a wireless charging circuit to determine whether wireless charging is possible; if wireless charging is possible, requesting encrypted authentication information from the external device to perform authentication for the external device; if the external device is an unauthenticated device, requesting the external device to send a first predetermined power; and if the external device is an authenticated device, requesting the external device to send a second predetermined power higher than the first predetermined power. The operation of determining whether wireless charging is possible may include: requesting identification information from the external device; receiving identification information of the external device from the external device; and determining whether the external device is a device that can send a maximum of the first predetermined power or a device that can send a maximum of the second predetermined power based on the identification information of the external device. The method may include: if the external device can send a maximum of the second predetermined power, requesting encrypted authentication information from the external device; and if the external device can send a maximum of the first predetermined power, requesting the external device to send the first predetermined power. The method may include: sending a request for a first predetermined power to an external device based on identification information of the external device, charging a battery based on the external device sending the first predetermined power; and requesting encrypted authentication information from the external device while charging the battery based on the sending of the first predetermined power.

[0104] Fig. 7A is a signal flow diagram of the operation of the wireless charging system according to an embodiment, Figure 7B is a signal flow diagram of the operation of the wireless charging system according to an embodiment. Figure 7B Can be Fig. 7A The signal flow diagram of the subsequent operations of step 759 is shown in FIG.

[0105] Reference Fig. 7A , the wireless charging system may include a wireless charging transmitter 710 (e.g., an external electronic device 302) and an electronic device 720 (e.g., an electronic device 301). For example, the wireless charging transmitter 710 may include a control circuit 711 (e.g., a multipoint control unit (MCU)) or a wireless charging transmission circuit 712 (e.g., a transmission integrated circuit (TX-IC)), and the electronic device 720 may include a wireless charging reception circuit 721 (e.g., a reception integrated circuit (RX-IC)) or a processor 722 (e.g., an application processor (AP)).

[0106] In step 701, if the electronic device 720 is mounted on the board of the wireless charging transmitter 710, the configuration for performing wireless charging may be started. For example, in step 701, the wireless charging transmitter 710 and the electronic device 720 may perform in-band communication according to a predetermined standard (e.g., the Wireless Power Consortium (WPC) standard), and step 701 may include the following operations: the electronic device 720 exchanges information required for wireless power transmission with the wireless charging transmitter 710. For example, wireless charging according to the WPC standard may include a ping operation, an identification and configuration operation, or a power transmission operation. The ping operation may be an operation of determining whether the electronic device 720 is placed on the wireless charging board, such as an operation of determining whether the electronic device 720 is close to the wireless charging transmitter 710. In the identification and configuration operation, the wireless charging transmitter 710 and the electronic device 720 may exchange identification information for power transmission through in-band communication. Or, for example, the electronic device 720 that configures the power transmission amount may determine the specified wireless power transmitted by the wireless charging transmitter 710. The power transmission operation may be an operation of transmitting a specified wireless power, for example, an operation of the wireless charging transmitter 710 transmitting a determined wireless power (for example, power corresponding to general wireless charging) to the electronic device 720 .

[0107] In step 702, the electronic device 720 may determine whether fast wireless charging is possible based on the result obtained by exchanging configuration information for fast wireless charging with the wireless charging transmitter 710. For example, step 702 may be performed with Figure 5 Steps 510 to 530 are the same or similar.

[0108] Step 702 may include: step 740, in which the electronic device 720 exchanges information with the wireless charging transmitter 710 to determine whether the wireless charging transmitter 710 supports fast wireless charging; and step 750, in which if the wireless charging transmitter 710 is determined to support fast wireless charging, the electronic device 720 requests identification information and / or configuration information related to wireless charging from the wireless charging transmitter 710.

[0109] In step 740, the processor 722 of the electronic device 720 may send a fast charging support request to the wireless charging transmitter 710 through the wireless charging receiving circuit 721 in step 741, and the wireless charging transmitting circuit 712 of the wireless charging transmitter 710 may transmit the received fast charging support request to the control circuit 711 in step 743. In step 745, the control circuit 711 of the wireless charging transmitter 710 may send information related to whether fast wireless charging is supported to the electronic device 720 through the wireless charging transmitting circuit 712 in response to the received fast charging support request. If the wireless charging receiving circuit 721 of the electronic device 720 receives the information related to whether fast wireless charging is supported, the wireless charging receiving circuit 721 may respond to the wireless charging transmitter 710 according to whether the information is received in step 747. If the wireless charging receiving circuit 721 of the electronic device 720 receives the information related to whether fast wireless charging is supported, the wireless charging receiving circuit 721 may send the received information to the processor 722 in step 749.

[0110] In step 750, if the wireless charging transmitter 710 is determined to support fast wireless charging, the processor 722 of the electronic device 720 may send a wireless charging identification (ID) request of the wireless charging transmitter 710 to the wireless charging transmitter 710 through the wireless charging receiving circuit 721 in step 751. In step 753, the wireless charging transmitting circuit 712 of the wireless charging transmitter 710 may send the received wireless charging transmitter identification request of the wireless charging transmitter 710 to the control circuit 711. In step 755, the control circuit 711 of the wireless charging transmitter 710 may send wireless charging transmitter identification information and / or configuration information to the electronic device 720 through the wireless charging transmitting circuit 712 in response to the received wireless charging identification request of the wireless charging transmitter 710. If the wireless charging receiving circuit 721 of the electronic device 720 receives the wireless charging transmitter identification and / or configuration information, the wireless charging receiving circuit 721 may respond to the wireless charging transmitter 710 in step 757 according to whether the information is received. If the wireless charging receiving circuit 721 of the electronic device 720 receives the wireless charging transmitter identification and / or configuration information, the wireless charging receiving circuit 721 may transmit the received information to the processor 722 in step 759. A fast charging support and transmitter identification determination may be made in step 760.

[0111] The identification information may include version information, a manufacturing code, or a basic device identifier. The identification information may include predefined information for identifying whether the wireless charging transmitter 710 is a device that can perform encryption authentication. The configuration information may include, for example, at least some of the wireless charging frequency, the maximum chargeable power, the required charging amount, and / or the average transmission power.

[0112] The processor 722 of the electronic device 720 may determine whether fast wireless charging is possible based on the received identification information and / or configuration information of the wireless charging transmitter 710. For example, the processor 722 of the electronic device 720 may determine whether the wireless charging transmitter 710 is a device that can transmit a maximum of a first predetermined power or a device that can transmit a second predetermined power based on the received identification information of the wireless charging transmitter 710. Since the second predetermined power is, for example, power that supports faster wireless charging, if the identification information of the wireless charging transmitter 710 corresponds to a device that can transmit the second predetermined power, the processor 722 may additionally request encryption authentication before requesting to transmit the second predetermined power. If the encryption authentication fails, the electronic device 101 may also send a command to the external electronic device 102 to transmit a first predetermined power lower than the second predetermined power, even though the wireless charging transmitter 710 has transmitted identification information corresponding to a device that can transmit the second predetermined power. That is, the following description Figure 7B An example of may be a process performed when the wireless charging transmitter 710 has transmitted identification information corresponding to a device that can transmit the second predetermined power. If the wireless charging transmitter 710 does not transmit identification information corresponding to a device that can transmit the second predetermined power (for example, if the wireless charging transmitter 710 can transmit identification information corresponding to a device that can transmit the first predetermined power at most), the process performed in Figure 7B The encryption authentication process of step 703 and step 704 shown in FIG. 1 is performed, and the electronic device 101 can send a command for sending the first predetermined power to the wireless charging transmitter 710.

[0113] Reference Figure 7B If the processor 722 of the electronic device 720 determines that fast wireless charging with the wireless charging transmitter 710 can be performed, the processor 722 can branch to step 703 to perform an encryption authentication process for determining whether faster wireless charging with the wireless fast charging transmitter 710 can be performed. For example, step 703 can be the same as Figure 5 Steps 540 to 560 are shown to be the same or similar.

[0114] In step 703, the processor 722 of the electronic device 720 may send an encrypted authentication request to the wireless charging transmitter 710 through the wireless charging receiving circuit 721 in step 761. In step 763, the wireless charging transmitting circuit 712 of the wireless charging transmitter 710 may transmit the received encrypted authentication request to the control circuit 711. In step 765, the control circuit 711 of the wireless charging transmitter 710 may send encrypted authentication information to the electronic device 720 through the wireless charging transmitting circuit in response to the received encrypted authentication request. If the encrypted authentication information is received, the wireless charging receiving circuit 721 of the electronic device 720 may transmit the received encrypted authentication information to the processor 722 in step 767.

[0115] The processor 722 of the electronic device 720 may determine whether the encrypted authentication information received from the wireless charging transmitter 710 is valid by using the encryption authentication module. For example, if the received encrypted authentication information is valid, the processor 722 of the electronic device 720 may determine in step 770 that the authentication has passed (or succeeded). The encryption authentication module may be embedded in the processor 722 of the electronic device 720. As another example, the encryption authentication module may be implemented as an integrated circuit (or chip) separate from the processor 722 of the electronic device 720.

[0116] If the encryption authentication is passed via the encryption authentication module, the processor 722 of the electronic device 720 may execute step 704 to configure a power level corresponding to faster wireless charging.

[0117] In step 704, the processor 722 of the electronic device 720 may transmit a command for switching to the faster wireless charging mode to the wireless charging transmitter 710 through the wireless charging receiving circuit 721 in step 781. For example, in step 783, the wireless charging transmitting circuit 712 of the wireless charging transmitter 710 may transmit a command for switching to the faster wireless charging mode to the control circuit 711. In response to receiving the command for switching to the faster wireless charging mode, in step 785, the control circuit 711 may transmit a charging power change request including information about the amount of power that can be transmitted to the electronic device 720 through the wireless charging transmitting circuit 712.

[0118] If a charging power change request is received, the wireless charging receiving circuit 721 of the electronic device 720 may respond to the wireless charging transmitter 710 according to whether the information is received in step 787. If a charging power change request is received, the wireless charging receiving circuit 721 of the electronic device 720 may transmit the received charging power change request to the processor 722 in step 789.

[0119] In step 790, the processor 722 may determine the charging power corresponding to the faster wireless charging mode in response to the charging power change request, and perform faster wireless charging based on the determined charging power. For example, the processor 722 of the electronic device 720 may control the wireless charging receiving circuit 721 to request power from the wireless charging transmitter 710 based on the determined charging power.

[0120] In step 783, the wireless charging transmission circuit 712 of the wireless charging transmitter 710 may transmit an identification information request command for switching to the faster wireless charging mode to the control circuit 711. In response to receiving the identification information request for switching to the faster wireless charging mode, in step 785, the control circuit 711 may transmit identification information for switching to the faster wireless charging mode to the electronic device 720 through the wireless charging transmission circuit 712.

[0121] If the identification information for switching to the faster wireless charging mode is received, the wireless charging receiving circuit 721 of the electronic device 720 may respond to the wireless charging transmitter 710 according to whether the information is received. Alternatively, the request for the faster wireless charging mode or the charging power may be forwarded based on the received identification information in step 787. In step 789, the wireless charging receiving circuit 721 of the electronic device 720 may transmit the received charging power change request to the processor 722.

[0122] Figure 8 is a signal flow graph of the operation in case of encryption authentication failure. Figure 8 Can be Fig. 7A The signal flow diagram of the subsequent operations of step 759 is shown in FIG. Figure 8 The operations before step 810 shown can be performed with Figure 7B The operations before step 770 are basically the same. Figure 8 Step 810 and subsequent operations.

[0123] Reference Figure 8 In step 810, if the received encrypted authentication information is invalid, the processor 722 of the electronic device 720 may determine that the authentication has not passed (eg, the authentication has failed) and execute step 820 to perform general wireless charging or fast wireless charging.

[0124] In step 820, the processor 722 of the electronic device 720 may transmit a command for switching to the fast wireless charging mode (or the general wireless charging mode) to the wireless charging transmitter 710 through the wireless charging receiving circuit 721 in step 821. In step 823, the wireless charging transmitting circuit 712 of the wireless charging transmitter 710 may transmit a command for switching to the fast wireless charging mode (or the general wireless charging mode) to the control circuit 711. In response to receiving the command for switching to the fast wireless charging mode (or the general wireless charging mode), the control circuit 711 may transmit charging power corresponding to the fast wireless charging mode (or the general wireless charging mode) to the electronic device 720 through the wireless charging transmitting circuit 712 in step 825. In step 827, the wireless charging receiving circuit 721 of the electronic device 720 may transmit the received charging power to the processor 722.

[0125] In step 830, the electronic device 720 may charge the battery in the fast wireless charging mode (or the general wireless charging mode) based on the charging power corresponding to the fast wireless charging mode (or the general wireless charging mode) transmitted by the wireless charging transmitter 710. For example, the processor 722 of the electronic device 720 may control the wireless charging receiving circuit 721 to request power from the wireless charging transmitter 710 based on the power supported in the fast wireless charging mode (or the general wireless charging mode).

[0126] The electronic device according to various embodiments may be one of various types of electronic devices. The electronic device may include, for example, a portable communication device (e.g., a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a household appliance. According to an embodiment of the present disclosure, the electronic device is not limited to those electronic devices described above.

[0127] It should be understood that the various embodiments of the present disclosure and the terms used therein are not intended to limit the technical features set forth herein to specific embodiments, but include various changes, equivalent forms or alternative forms for corresponding embodiments. For the description of the accompanying drawings, similar reference numerals may be used to refer to similar or related elements. It will be understood that the nouns in the singular form corresponding to the term may include one or more things unless the relevant context clearly indicates otherwise. As used herein, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C" and "at least one of A, B or C" may include any one or all possible combinations of the items listed together with the corresponding one of the multiple phrases. As used herein, terms such as "1st" and "2nd" or "first" and "second" may be used to simply distinguish the corresponding component from another component, and do not limit the component in other aspects (e.g., importance or order). It will be understood that if an element (e.g., a first element) is referred to as being “combined with another element (e.g., the second element)”, “combined to another element (e.g., the second element)”, “connected with another element (e.g., the second element)”, or “connected to another element (e.g., the second element)” when the terms “operably” or “communicatively” are used or when the terms “operably” or “communicatively” are not used, it means that the element may be directly (e.g., wired) connected to the other element, wirelessly connected to the other element, or connected to the other element via a third element.

[0128] As used herein, the term "module" may include units implemented in hardware, software, or firmware, and may be used interchangeably with other terms (e.g., "logic," "logic block," "portion," or "circuit"). A module may be a single integrated component adapted to perform one or more functions or a minimum unit or portion of the single integrated component. For example, according to an embodiment, a module may be implemented in the form of an application specific integrated circuit (ASIC).

[0129] The various embodiments described herein may be implemented as software (e.g., program 140) including one or more instructions stored in a storage medium (e.g., internal memory 136 or external memory 138) that can be read by a machine (e.g., electronic device 101). For example, under the control of a processor, a processor (e.g., processor 120) of the machine (e.g., electronic device 101) may call at least one of the one or more instructions stored in the storage medium and execute the at least one instruction with or without the use of one or more other components. This enables the machine to operate to perform at least one function according to the at least one instruction called. The one or more instructions may include code generated by a compiler or code that can be run by an interpreter. A machine-readable storage medium may be provided in the form of a non-transitory storage medium. Among them, the term "non-transitory" only means that the storage medium is a tangible device and does not include a signal (e.g., an electromagnetic wave), but the term does not distinguish between data being semi-permanently stored in a storage medium and data being temporarily stored in a storage medium.

[0130] According to an embodiment, the method according to various embodiments of the present disclosure may be included and provided in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be published in the form of a machine-readable storage medium (e.g., a compact disk read-only memory (CD-ROM)), or may be published online (e.g., downloaded or uploaded) via an application store (e.g., Play StoreTM), or may be distributed (e.g., downloaded or uploaded) directly between two user devices (e.g., smart phones). If published online, at least part of the computer program product may be temporarily generated, or at least part of the computer program product may be at least temporarily stored in a machine-readable storage medium (such as a manufacturer's server, an application store's server, or a memory of a forwarding server).

[0131] According to various embodiments, each component (e.g., module or program) in the above-mentioned components may include a single entity or multiple entities. According to various embodiments, one or more components in the above-mentioned components may be omitted, or one or more other components may be added. Alternatively or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, according to various embodiments, the integrated component may still perform the one or more functions of each component in the multiple components in the same or similar manner as a corresponding component in the multiple components before integration. According to various embodiments, the operations performed by a module, program or another component may be performed sequentially, in parallel, repeatedly or in a heuristic manner, or one or more operations in the operations may be run or omitted in different orders, or one or more other operations may be added.

[0132] While the disclosure has been particularly shown and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents.

Claims

1. An electronic device, comprising: Battery; a coil configured to wirelessly receive power; a power receiving circuit electrically connected to the coil; Communication circuits; and a processor, the processor comprising a processing circuit, operably connected to the power receiving circuit and the communication circuit, and configured to: sending a first packet to an external device through the communication circuit, the first packet being used to request information about the external device; receiving, through the communication circuit, a second packet from the external device as a response to the first packet, the second packet including information on a maximum transmittable power of the external device; determining a level of power that the external device can transmit based on the information about the maximum transmittable power of the external device; sending, through the communication circuit, a third packet in response to determining that the external device is capable of transmitting the first level of power, the third packet being used to request the first level of power from the external device; controlling the power receiving circuit to charge the battery with the received power from the external device based on the first level of power; as well as Authentication with the external device is performed to increase the first level of power to a second level of power higher than the first level of power.

2. The device according to claim 1, wherein: The processor is further configured to: When the external device is an unauthenticated device, transmitting a packet for requesting the first level of power to the external device through the communication circuit; as well as When the external device is an authenticated device, a packet for requesting the second level of power is transmitted to the external device through the communication circuit.

3. The device according to claim 1, wherein: The device further includes an encryption authentication module configured to perform the authentication with the external device.

4. The device according to claim 3, wherein: The encryption authentication module is embedded in the processor.

5. A method for wirelessly charging an electronic device, the method comprising: sending a first packet to an external device through a communication circuit, the first packet being used to request information about the external device; receiving, through the communication circuit, a second packet from the external device as a response to the first packet, the second packet including information on a maximum transmittable power of the external device; determining a level of power that the external device can transmit based on the information about the maximum transmittable power of the external device; sending, through the communication circuit, a third packet in response to determining that the external device is capable of transmitting the first level of power, the third packet being used to request the first level of power from the external device; controlling a power receiving circuit to charge a battery with received power from the external device based on the first level of power; as well as Authentication with the external device is performed to increase the first level of power to a second level of power higher than the first level of power.

6. The method according to claim 5, further comprising: when the external device is an unauthenticated device, transmitting a packet for requesting the first level of power to the external device through the communication circuit; as well as When the external device is an authenticated device, a packet for requesting the second level of power is transmitted to the external device through the communication circuit.

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