Electronic device and power control method for wireless charging

Abstract

Provided is a power control method for wireless charging and an electronic device thereof. The electronic device includes a coil, an inverter including a gate input terminal electrically connected to the coil, and at least one processor. The at least one processor is configured to: control the gate input terminal of the inverter in an anti-symmetrical manner to generate output power; receive an output power reduction request from an external electronic device; based on the received output power reduction request, determine whether the ratio of ON operation to OFF operation of the gate input terminal of the inverter is less than or equal to a specified ratio; and based on the ratio of ON operation to OFF operation of the gate input terminal of the inverter being less than or equal to a specified ratio, modulate the phase of the voltage input to the gate input terminal of the inverter to generate output power.

Description

Technical Field

[0001] The present disclosure relates to a power control method for wireless charging and an electronic device including the method. Background Art

[0002] Recently, various application products are released that can support operations of charging various electronic products using a charging pad using a wireless charging system (eg, a magnetic induction scheme or a resonance scheme) and can support operations of charging various electronic products using a mobile terminal.

[0003] The above information is provided as background information only to assist in understanding the present disclosure. No determination or assertion is made as to whether any of the above may be applicable as prior art to the present disclosure. Summary of the invention

[0004] Technical issues

[0005] As various application products are released, it is expected to improve the electromagnetic interference phenomenon while supporting wireless charging at various power levels.

[0006] Various aspects of the present disclosure are to solve at least the above problems and / or disadvantages and provide at least the advantages described below. Therefore, one aspect of the present disclosure is to provide a wireless power control method that can reduce electromagnetic interference during wireless power transmission and an electronic device implementing the method.

[0007] Solution to the problem

[0008] As various application products are released, it is expected to improve the electromagnetic interference phenomenon while supporting wireless charging at various power levels.

[0009] Various aspects of the present disclosure are to solve at least the above problems and / or disadvantages and provide at least the advantages described below. Therefore, one aspect of the present disclosure is to provide a wireless power control method that can reduce electromagnetic interference during wireless power transmission and an electronic device implementing the method.

[0010] Additional aspects will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the illustrated embodiments.

[0011] According to one aspect of the present disclosure, an electronic device is provided. The electronic device includes: a coil; an inverter, the inverter including a plurality of gate input terminals electrically connected to the coil; and at least one processor, the at least one processor being configured to: control the plurality of gate input terminals of the inverter in an anti-symmetrical manner to generate output power, receive an output power reduction request from an external electronic device, determine whether the ratio of ON operation to OFF operation of the plurality of gate input terminals of the inverter is less than or equal to a specified ratio based on the output power reduction request received; and modulate the phase of the voltage input to the plurality of gate input terminals of the inverter based on the ratio of ON operation to OFF operation of the plurality of gate input terminals of the inverter being less than or equal to a specified ratio to generate output power.

[0012] According to another aspect of the present disclosure, a power control method for wireless charging of an electronic device is provided. The power control method includes: generating output power by controlling multiple gate input terminals of an inverter in an anti-symmetrical manner; receiving an output power reduction request from an external electronic device; determining whether the ratio of ON operation to OFF operation of the multiple gate input terminals of the inverter is less than or equal to a specified ratio based on the received output power reduction request; and generating output power by modulating the phase of the voltage input to the multiple gates of the inverter based on the ratio of ON operation to OFF operation of the multiple gate input terminals of the inverter being less than or equal to the specified ratio.

[0013] According to another aspect of the present disclosure, an electronic device is provided. The electronic device includes a coil, an inverter including a plurality of gate input terminals electrically connected to the coil, and at least one processor, wherein the at least one processor is configured to: generate output power having a first frequency by controlling an input voltage so that the inverter performs an ON operation and an OFF operation at the same ratio; receive a request for reducing the output power from an external electronic device; based on receiving the request for reducing the output power, generate output power having a first frequency by controlling the input voltage so that the inverter performs an ON operation and an OFF operation at different ratios; and transmit the output power to the external electronic device through the coil.

[0014] A power control method for wireless charging according to various embodiments and an electronic device implementing the method may control power to be transmitted when wireless power is transmitted to reduce electromagnetic interference.

[0015] A power control method for wireless charging according to various embodiments and an electronic device implementing the method may control power to be transmitted when wireless power is transmitted, thereby reducing disconnection of power when low-power transmission is performed.

[0016] Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the disclosure.

[0017] Beneficial effects of the present invention

[0018] A power control method for wireless charging according to various embodiments and an electronic device implementing the method may control power to be transmitted when wireless power is transmitted to reduce electromagnetic interference.

[0019] A power control method for wireless charging according to various embodiments and an electronic device implementing the method may control power to be transmitted when wireless power is transmitted, thereby reducing disconnection of power when low-power transmission is performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] Figure 1 is a block diagram illustrating an electronic device in a network environment according to various embodiments;

[0022] Figure 2a is a diagram illustrating a wireless charging environment of an electronic device and an external electronic device according to an embodiment of the present disclosure;

[0023] Figure 2b is a diagram illustrating a wireless charging environment of an electronic device and an external electronic device according to an embodiment of the present disclosure;

[0024] Figure 3 is a flowchart illustrating a wireless power control method of an electronic device according to an embodiment of the present disclosure;

[0025] Figure 4 is a flowchart illustrating a wireless power control method of an electronic device according to an embodiment of the present disclosure;

[0026] Figure 5 The present invention is a diagram showing an embodiment of the present invention. Figure 3 A flowchart of operation 307;

[0027] Figure 6 is a diagram showing an inverter including a transmitting coil and a plurality of gates of an electronic device according to an embodiment of the present disclosure;

[0028] Figure 7 is a time-voltage graph showing a wireless power control method of an electronic device according to an embodiment of the present disclosure;

[0029] Figure 8is a time-voltage graph showing a wireless power control method of an electronic device according to an embodiment of the present disclosure;

[0030] Fig. 9 is a time-voltage graph showing a wireless power control method of an electronic device according to an embodiment of the present disclosure;

[0031] Fig.10 is a frequency-power curve diagram showing a wireless power control method of an electronic device according to an embodiment of the present disclosure;

[0032] Fig.11 is a diagram illustrating an electronic device and an external electronic device according to an embodiment of the present disclosure; and

[0033] Fig.12 is a diagram illustrating an electronic device and an external electronic device according to an embodiment of the present disclosure.

[0034] It should be noted that throughout the drawings, like reference numbers are used to depict the same or similar elements, features, and structures. DETAILED DESCRIPTION

[0035] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of the various embodiments of the present disclosure as defined by the claims and their equivalents. It includes various specific details to assist in understanding, but these details are to be considered as examples only. Therefore, it will be appreciated by those of ordinary skill in the art that various changes and modifications may be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and structures may be omitted for clarity and conciseness.

[0036] The terms and expressions used in the following description and claims are not limited to the written meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Therefore, it should be understood by those skilled in the art that the following description of various embodiments of the present disclosure is for illustrative purposes only and is not intended to limit the present disclosure as defined by the attached claims and their equivalents.

[0037] It should be understood that the non-quantitative expressions "a", "an", and "the" also include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0038] Figure 1 is a block diagram illustrating an electronic device 101 in a network environment 100 according to an embodiment of the present disclosure.

[0039] Reference 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).

[0040] 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 .

[0041] 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.

[0042] 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.

[0043] 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 .

[0044] 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).

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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).

[0051] 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.

[0052] 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.

[0053] 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).

[0054] 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.

[0055] 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.

[0056] 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.

[0057] At least some of the above components may be connected to each other via an inter-peripheral communication scheme (e.g., a bus, general purpose input output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and communicatively transmit signals (e.g., commands or data) therebetween.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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).

[0062] 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.

[0063] 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 released in the form of a machine-readable storage medium (e.g., a compact disk read-only memory (CD-ROM)), or may be downloaded via an application store (e.g., Play Store TM ) The computer program product may be published (e.g., downloaded or uploaded) online, or the computer program product 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 memory of a manufacturer's server, an application store's server, or a forwarding server).

[0064] 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.

[0065] Figure 2a 2 is a diagram illustrating a wireless charging environment 200 of an electronic device and an external electronic device (eg, a watch or earphones) according to an embodiment of the present disclosure.

[0066] refer to Figure 2a , according to various embodiments, the electronic device 101 (eg, Figure 1 The electronic device 101 of the present invention can wirelessly transmit power to the external electronic device 104 (for example, a watch or headphones), and can perform charging. The external electronic device 104 can wirelessly receive power.

[0067] According to various embodiments, the electronic device 101 may include a power transmission circuit 210 , a control circuit 220 , a communication circuit 230 (eg, a transceiver), and / or a sensing circuit 240 .

[0068] According to various embodiments, the power transmission circuit 210 may include: a power adapter 211, which receives a power supply (or power) from the outside and appropriately converts the voltage of the input power; a power generation circuit 213, which generates power; and / or a matching circuit 215, which maximizes the efficiency between the transmitting coil 242 and the receiving coil 252.

[0069] According to various embodiments, the power transmission circuit 210 may include multiple entities corresponding to at least some of the power adapter 211, the power generation circuit 213, the matching circuit 215 or the transmitting coil 242 to transmit power to multiple external electronic devices (e.g., watches, headphones, etc.).

[0070] According to various embodiments, the power transmission circuit 210 can use the power generation circuit 213 to generate a first signal of a first frequency for providing a first power to, for example, a watch, and can generate a second signal of a second frequency for providing a second power to, for example, headphones.

[0071] According to various embodiments, the control circuit 220 may generally control the electronic device 101, may generate various messages required for wireless power transmission, and may transmit them to the communication circuit 230. According to an embodiment, the control circuit 220 may obtain power (or electric energy) to be transmitted to the external electronic device 104 based on the information received from the communication circuit 230. According to an embodiment, the control circuit 220 may control the power transmission circuit 210 so that the power obtained by the transmission coil 242 is transmitted to the external electronic device 104.

[0072] According to various embodiments, in order to send power to each of multiple external electronic devices (e.g., a watch and headphones), the control circuit 220 can control the power generating circuit 213 to generate a first signal of a first frequency for providing a first power to, for example, a watch, and generate a second signal of a second frequency for providing a second power to, for example, the headphones.

[0073] According to various embodiments, the communication circuit 230 may include at least one of a first communication circuit 231 and a second communication circuit 232. The first communication circuit 231 may communicate with the first communication circuit 271 of the external electronic device 104 according to, for example, an in-band scheme using the same frequency as the frequency used by the transmitting coil 242 for power transmission. According to an embodiment, the second communication circuit 232 may communicate with the second communication circuit 272 of the external electronic device 104 according to, for example, an out-of-band scheme using a frequency different from the frequency used by the transmitting coil 242 for power transmission. For example, the second communication circuit 232 may obtain information related to the charging state (e.g., Vrec information, Iout information, various data packets, messages, etc.) from the second communication circuit 272 using one of various short-range communication schemes (e.g., Bluetooth, Bluetooth Low Energy (BLE), Wi-Fi, and Near Field Communication (NFC)).

[0074] According to various embodiments, the sensing circuit 240 may include at least one sensor, and may sense at least one state of the external electronic device 104 using the at least one sensor.

[0075] According to various embodiments, the sensing circuit 240 may include at least one of a temperature sensor, a motion sensor, or a current (or voltage) sensor. The temperature sensor may sense the temperature of the electronic device 101. The motion sensor may sense the motion of the electronic device 101. The current (or voltage) sensor may sense the state of the output signal of the electronic device 101, for example, the magnitude of the current, the magnitude of the voltage, or the magnitude of the power.

[0076] According to various embodiments, the current (or voltage) sensor may measure a signal in at least a partial area of ​​the power transmission circuit 210. For example, the current (or voltage) sensor may include a circuit for measuring a signal at a front end of the transmission coil 242. According to various embodiments, the sensing circuit 240 may be a circuit for foreign object detection (FOD).

[0077] According to various embodiments, the external electronic device 104 (e.g., a watch or earphone) that receives power output from the electronic device 101 may include a power receiving circuit 250, a control circuit 260, a communication circuit 270 (e.g., a transceiver), at least one sensor 280, a display 285, and / or a detection circuit 290. According to various embodiments, descriptions of some elements of the external electronic device 104 corresponding to those of the electronic device 101 may be omitted.

[0078] According to various embodiments, the power receiving circuit 250 may include: a receiving coil 252 for wirelessly receiving power from the electronic device 101, a matching circuit 251, a rectifying circuit 253 for rectifying the received AC power into DC power, a regulating circuit 255 for regulating the charging voltage, a switching circuit 257, and / or a battery 259.

[0079] According to various embodiments, the control circuit 260 may generally control the electronic device 104 , may generate various messages required for wireless power reception, and may transmit them to the communication circuit 270 .

[0080] According to various embodiments, the communication circuit 270 may include at least one of a first communication circuit 271 and a second communication circuit 272. The first communication circuit 271 may communicate with the electronic device 101 via the receiving coil 252. The second communication circuit 272 may communicate with the electronic device 101 using one of various short-range communication schemes such as Bluetooth, BLE, Wi-Fi, or NFC.

[0081] According to various embodiments, the at least one sensor 280 may include at least some of a current / voltage sensor, a temperature sensor, an illumination sensor, or a sound sensor.

[0082] According to various embodiments, the display 285 may display various types of display information required for wireless power transmission / reception.

[0083] According to various embodiments, the detection circuit 290 may detect a detection signal or power received from the electronic device 101, and may detect the electronic device 101. The detection circuit 290 may receive a signal output from the electronic device 101 via the receiving coil 252, and may detect a change in the signal at the input / output end of the matching circuit 251 or the rectifying circuit 253. According to various embodiments, the detection circuit 290 may be included in the power receiving circuit 250.

[0084] Figure 2b is a diagram illustrating a wireless charging environment 400 of an electronic device and an external electronic device 104 according to an embodiment of the present disclosure.

[0085] refer to Figure 2b According to various embodiments, the electronic device 101 may perform wireless power transmission or reception with the external electronic device 104 .

[0086] According to various embodiments, each of the electronic device 101 and the external electronic device 104 may include a mobile terminal (eg, a smart phone). The external electronic device 104 may perform wireless power transmission or reception with the electronic device 101.

[0087] According to various embodiments, the electronic device 101 may include a wireless charging coil 218 , a wireless charging transmission / reception coil 216 , a power management IC (PMIC) 214 , a battery 226 , a power supply unit 212 , and a processor 219 .

[0088] According to various embodiments, the external electronic device 104 may include a wireless charging coil 228, a wireless charging transmission / reception coil 216, a power management IC (PMIC) 224, a battery 227, a power supply unit 222 and a processor 229, which have different figure marks from the corresponding elements of the electronic device 101 but perform the same functions.

[0089] Hereinafter, various functions will be described with reference to the elements of the electronic device 101. Detailed description of elements of the external electronic device 104 that perform the same functions as those of the electronic device 101 will be omitted.

[0090] According to various embodiments, the wireless charging coil 218 may be implemented in a pattern wound in a spiral form around a printed circuit board (PCB). The wireless charging coil 218 may perform, for example, Figure 2aThe wireless charging coil 218 may wirelessly transmit power to the external electronic device 104. The wireless charging coil 218 may wirelessly receive power from the external electronic device 104.

[0091] According to various embodiments, the wireless charging transmission / reception circuit 216 may convert the power into a power signal, and may transmit the power signal to the external electronic device 104 via the wireless charging coil 218. The wireless charging transmission / reception circuit 216 may convert the power signal received via the wireless charging coil 218 into power. The wireless charging transmission / reception circuit 216 may provide the converted power to the power management IC (PMIC) 214. According to various embodiments, the wireless charging transmission / reception circuit 216 may support at least one of various wireless charging schemes, including, for example, a magnetic resonance scheme or a magnetic induction scheme.

[0092] According to various embodiments, the wireless charging transmission / reception circuit 216 may include, for example Figure 2a The wireless charging transmission / reception circuit 216 may include a full bridge circuit. The wireless charging transmission / reception circuit 216 may perform control so that during the wireless power transmission operation using the wireless charging coil 218, the full bridge circuit operates as an inverter (DC→AC). The wireless charging transmission / reception circuit 216 may perform control so that during the wireless power operation using the wireless charging coil 218, the full bridge circuit operates as a rectifier (AC→DC).

[0093] According to various embodiments, the wireless power transmission / reception circuit 216 may exchange information required for wireless power transmission / reception with the external electronic device 104 via in-band communication according to the Wireless Power Consortium (WPC) standard. According to the in-band communication, the electronic device 101 and the external electronic device 104 may exchange data by modulation of the frequency or amplitude of the wireless power transmission signal in a state of wireless power transmission between the wireless charging coil 218 of the electronic device 101 and the wireless charging coil 228 of the external electronic device 104. According to various embodiments, the electronic device 101 and the external electronic device 104 may exchange information required for wireless power transmission or reception via out-of-band communication. The out-of-band communication may use at least one of various short-range communication schemes, such as Bluetooth, Bluetooth Low Energy (BLE), Wi-Fi, near field communication (NFC), and the like.

[0094] According to various embodiments, the power management IC 214 may receive power from the power supply unit 212 and may charge the battery 226. The power management IC 214 may monitor a charging current value and a voltage value provided to the battery 226. When the battery 226 is fully charged, the power management IC 214 may provide information indicating that the battery 226 is fully charged to the processor 219.

[0095] According to various embodiments, the power management IC 214 can perform the following functions: charge the battery 226 with power input from the power supply unit 212 in a wired or wireless manner; communicate with the external power supply unit 212 connected via the USB terminal; provide the power required by the electronic device 101, and provide power at a voltage level suitable for the components (for example, the wireless charging transmission / reception circuit 216 or the processor 219); or provide power to the wireless charging transmission / reception circuit 216 in a wireless power transfer mode.

[0096] According to various embodiments, power may be supplied from the power management IC 214 to the battery 226. The battery 226 is a device for supplying power to at least one element of the electronic device 101, and may include, for example, a disposable primary battery, a rechargeable secondary battery, or a fuel cell. The battery 226 may be integrated with the electronic device 101, or may be arranged to be detachable from the electronic device 101.

[0097] According to various embodiments, the power supply unit 212 may provide power required by the electronic device 101. The power supply unit 212 may provide power to the electronic device 101 via a travel adapter (TA) or a USB. The power supply unit 212 may include an external connection terminal that supports an interface such as a USB charging interface or an on-the-go (OTG) power supply interface.

[0098] According to various embodiments, the processor 219 may be electrically connected to the wireless charging coil 218, the wireless charging transmission / reception circuit 216, the power management IC 214, the battery 226, and the power supply unit 212 in the electronic device 101, and may generally control the electronic device 101. The processor 219 may generate various messages required to perform wireless power transmission or reception with the external electronic device 104. The processor 219 may obtain power (or electric energy) to be transmitted to the external electronic device 104.

[0099] According to various embodiments, when Figure 2aWhen the external electronic device 104 (e.g., a smart phone) or an external electronic device (e.g., a watch or earphone) is in contact with or close to the electronic device 101, the processor 219 can use the wireless charging coil 218 and the wireless charging transmission / reception circuit 216 to wirelessly transmit the power stored in the battery 226. When the electronic device 101 is in contact with or close to the external electronic device 104, the processor 219 can use the wireless charging coil 218 to wirelessly receive power.

[0100] Figure 3 is a flowchart illustrating a wireless power control method of the electronic device 101 according to an embodiment of the present disclosure.

[0101] refer to Figure 3 According to various embodiments, the electronic device 101 may control the input voltage in operation 301 according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216), so that the inverter including a plurality of gate input terminals performs an ON operation (conduction operation) or an OFF operation (cut-off operation) at the same ratio during a first period, generates output power having a first frequency, and transmits the output power to an external electronic device (e.g., the electronic device 104) through a coil electrically connected to the inverter. The inverter including a plurality of gate input terminals may be, for example, a full-bridge inverter including a plurality of gate input terminals.

[0102] According to various embodiments, the electronic device 101 may determine in operation 303 whether an external electronic device (e.g., electronic device 104) requests a reduction in transmission power according to the control of the processor 120 or a control circuit (e.g., a power transmission circuit 210 or a wireless charging transmission / reception circuit 216).

[0103] According to various embodiments, when transmitting power to an external electronic device (e.g., the electronic device 104), the electronic device 101 may determine whether the external electronic device (e.g., the electronic device 104) has transmitted a request for reducing the power transmitted from the electronic device 101 according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216) in operation 303. The electronic device 101 may receive a request for reducing the power transmitted from the electronic device 101 from the external electronic device (e.g., the electronic device 104) through the communication module 190 (e.g., the transceiver) in operation 303 according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0104] According to various embodiments, the electronic device 101 may exchange information required for wireless power transmission or reception with the external electronic device 104 via in-band communication according to the Wireless Power Consortium (WPC) standard. According to the in-band communication, the electronic device 101 and the external electronic device 104 may exchange data by modulating the frequency or amplitude of a wireless power transmission signal in a state of wireless power transmission between the wireless charging coil 218 of the electronic device 101 and the wireless charging coil 228 of the external electronic device 104.

[0105] According to various embodiments, the electronic device 101 and the external electronic device 104 may exchange information required for wireless power transmission or reception via out-of-band communication. The out-of-band communication may use at least one of various short-range communication schemes, such as Bluetooth, Bluetooth Low Energy (BLE), Wi-Fi, Near Field Communication (NFC), etc.

[0106] According to various embodiments, the electronic device 101 may receive a request for reducing the power transmitted from the electronic device 101 from an external electronic device (e.g., the electronic device 104) in the form of electromagnetic waves through a coil or an antenna according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216) in operation 303. For example, the electronic device 101 may transmit power having a predetermined frequency to an external electronic device (e.g., the electronic device 104) through a coil or an antenna so as to charge the external electronic device (e.g., the electronic device 104). In this case, the electronic device 101 may transmit information to the external electronic device (e.g., the electronic device 104) through a coil or an antenna by applying various modulation schemes (e.g., frequency shift keying, phase shift keying, amplitude shift keying, etc.) to the power having a predetermined frequency. In addition, the external electronic device (e.g., the electronic device 104) may transmit information to the electronic device 101 through a coil or an antenna by applying various modulation schemes (e.g., frequency shift keying, phase shift keying, amplitude shift keying, etc.) to the power having a predetermined frequency.

[0107] According to various embodiments, when the voltage reaches the cut-off voltage during the external electronic device (e.g., electronic device 104) charging the battery (e.g., battery 259 or battery 227) using the power transmitted from the electronic device 101, there is a section in which secondary charging is performed until a predetermined current. This section is called a CV section. When the external electronic device (e.g., electronic device 104) enters the CV section, the external electronic device can request the electronic device 101 to reduce the power to be transmitted.

[0108] According to various embodiments, when charging of a battery of an external electronic device (eg, battery 259 or battery 227 ) is completed using power transmitted from electronic device 101 , the external electronic device (eg, electronic device 104 ) may request electronic device 101 to reduce power to be transmitted.

[0109] According to various embodiments, when heat is generated during charging of a battery of an external electronic device (e.g., battery 259 or battery 227) using power transmitted from electronic device 101, the external electronic device (e.g., electronic device 104) may request electronic device 101 to reduce the power to be transmitted.

[0110] According to various embodiments, when sending power to an external electronic device (e.g., electronic device 104), if the external electronic device (e.g., electronic device 104) requests to reduce the power sent from the electronic device 101, the electronic device 101 can perform operation 305 according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0111] According to various embodiments, when transmitting power to an external electronic device (e.g., electronic device 104), if the external electronic device (e.g., electronic device 104) does not request to reduce the power transmitted from the electronic device 101, the electronic device 101 may operate 301 according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216). Therefore, the electronic device 101 may control the input voltage so that the inverter including a plurality of gate input terminals operates the ON operation and the OFF operation at the same ratio within the first period, may generate output power having a first frequency, and may transmit the output power to the external electronic device (e.g., electronic device 104) through a coil electrically connected to the inverter.

[0112] According to various embodiments, the electronic device 101 may determine whether the first frequency of the output power reaches a specified frequency according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216) in operation 305. For example, the specified frequency may be 148.5Khz. The specified frequency may be specified according to international standards or may be specified by the manufacturer of the electronic device 101.

[0113] If it is determined that the first frequency of the output power reaches the designated frequency, the electronic device 101 may perform operation 307 according to the control of the processor 120 or a control circuit (eg, the power transmission circuit 210 or the wireless charging transmission / reception circuit 216 ).

[0114] If it is determined that the first frequency of the output power does not reach the designated frequency, the electronic device 101 may perform operation 309 according to the control of the processor 120 or a control circuit (eg, the power transmission circuit 210 or the wireless charging transmission / reception circuit 216 ).

[0115] If it is determined that the first frequency of the output power reaches the specified frequency, the electronic device 101 may control the plurality of gate input terminals in an anti-symmetrical manner according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216) in operation 307, or may control the plurality of gate input terminals by phase modulation of the input voltage, and may transmit the output power having the first frequency. In this case, the output power in operation 307 may be lower than the output power in operation 301.

[0116] If it is determined that the first frequency of the output power reaches the specified frequency, the electronic device 101 can control the input voltage according to the control of the processor 120 or the control circuit (for example, the power transmission circuit 210 or the wireless charging transmission / reception circuit 216), so that the inverter including multiple gate input terminals performs ON operation and OFF operation in different proportions during the first time period, and can generate output power with a first frequency, and can send the output power to an external electronic device (for example, the electronic device 104) through a coil electrically connected to the inverter.

[0117] refer to Figure 6 , a description will be given of a case where an inverter including a plurality of gate input terminals performs ON operation and OFF operation at different ratios during a first period. If by comparing Figure 6 The first path of the inverter 601 is a field effect transistor (FET) (eg, Figure 6 FET 611 or 614) and the conduction time of the second path FET (e.g., Figure 6 The fact that the on-time of the FET of the first path is shorter than the on-time of the FET of the second path can be represented by the on-time of the FET 612 or 613 of the first path. Figure 6 The ratio of the ON operation (conduction operation) to the OFF operation (cutoff operation) of the inverter 601 is reduced.

[0118] According to various embodiments, in operation 307, the electronic device 101 sets the ratio (e.g., 50:50) of the ON operation (conduction operation) and the OFF operation (cutoff operation) of the plurality of gate input terminals to be higher than a specified ratio, the phase of the voltage input to the plurality of gate input terminals of the inverter may be modulated, and output power having a first frequency may be generated. For example, the electronic device 101 may set the FET of the first path (e.g., Figure 6The on-time of the FET 611 or 614) of the second path is different from that of the FET of the second path (e.g., Figure 6 The ratio of the on-time of the FET 612 or 613 of the first path is set to 50:50, and the phase of the voltage input to the gate can be modulated so that the FET of the first path (for example, Figure 6 FET 611 or 614) and the conduction operation of the second path FET (for example, Figure 6 The on-state operation of FET 612 or 613).

[0119] According to various embodiments, when the electronic device 101 modulates the phase of the voltage to the multiple gate input terminals of the inverter in operation 307, the ratio of the time to establish an electrical path between the first path to the coil (e.g., the wireless charging coil 228) and the time to establish an electrical path between the second path to the coil (e.g., the wireless charging coil 228) can be changed.

[0120] According to various embodiments, in operation 307 , the duty ratio of the output power having the first frequency may be reduced by controlling a gate input terminal through phase modulation and outputting the output power having the first frequency.

[0121] If it is determined that the first frequency of the output power does not reach the specified frequency, in operation 309, the electronic device 101 can control the input voltage according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216), so that the inverter including a plurality of gate input terminals performs ON operation and OFF operation in the same proportion during the second period, and can generate output power with a second frequency, and can transmit the output power to an external electronic device (e.g., the electronic device 104) through a coil electrically connected to the inverter. The second frequency can be within a specified frequency range and can be higher than the first frequency. The first period can be longer than the second period.

[0122] Figure 4 is a flowchart illustrating a wireless power control method of the electronic device 101 according to an embodiment of the present disclosure.

[0123] refer to Figure 4 According to various embodiments, the electronic device 101 may transmit output power having a first frequency to an external electronic device (e.g., the electronic device 104) according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216) in operation 401. In this case, the duty ratio of the output power having the first frequency may be 50:50.

[0124] According to various embodiments, the electronic device 101 may determine in operation 403 whether to receive a request for reducing the transmission power from an external electronic device (e.g., the electronic device 104) according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0125] According to various embodiments, when sending power to an external electronic device (e.g., electronic device 104), if the external electronic device (e.g., electronic device 104) requests to reduce the power to be sent from the electronic device 101, the electronic device 101 can perform operation 405 according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0126] According to various embodiments, when the voltage reaches the cut-off voltage during the external electronic device (e.g., electronic device 104) charging the battery (e.g., battery 259 or battery 227) using the power transmitted from the electronic device 101, there is an interval in which secondary charging is performed until a predetermined current. This interval is called a CV interval. When the external electronic device (e.g., electronic device 104) enters the CV interval, the external electronic device can request the electronic device 101 to reduce the power to be transmitted.

[0127] According to various embodiments, when charging of a battery of an external electronic device (eg, battery 259 or battery 227 ) is completed using power transmitted from electronic device 101 , the external electronic device (eg, electronic device 104 ) may request electronic device 101 to reduce power to be transmitted.

[0128] According to various embodiments, when heat is generated during charging of a battery of an external electronic device (e.g., battery 259 or battery 227) using power transmitted from electronic device 101, the external electronic device (e.g., electronic device 104) may request electronic device 101 to reduce the power to be transmitted.

[0129] According to various embodiments, when the electronic device 101 sends power to an external electronic device (e.g., electronic device 104), if the external electronic device (e.g., electronic device 104) does not request to reduce the power sent from the electronic device 101, the electronic device 101 may operate 401 according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216) to send output power having a first frequency to the external electronic device (e.g., electronic device 104).

[0130] According to various embodiments, the electronic device 101 may determine whether the first frequency of the output power reaches a specified frequency according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216) in operation 405. For example, the specified frequency may be 148.5Khz. The specified frequency may be specified according to international standards or may be specified by the manufacturer of the electronic device 101.

[0131] If it is determined that the first frequency of the output power reaches the designated frequency, the electronic device 101 may perform operation 407 according to the control of the processor 120 or a control circuit (eg, the power transmission circuit 210 or the wireless charging transmission / reception circuit 216 ).

[0132] If it is determined that the first frequency of the output power does not reach the designated frequency, the electronic device 101 may perform operation 409 according to the control of the processor 120 or a control circuit (eg, the power transmission circuit 210 or the wireless charging transmission / reception circuit 216 ).

[0133] If it is determined that the first frequency of the output power reaches the specified frequency, the electronic device 101 may adjust the duty ratio of the output power having the first frequency according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216) and may transmit the output power to the external electronic device (e.g., the electronic device 104) in operation 407. In this case, the duty ratio of the output power having the first frequency may be adjusted from 50:50 to within a range of 30:70 to 35:65.

[0134] If it is determined that the first frequency of the output power does not reach the specified frequency, in operation 409, the electronic device 101 may change the frequency of the output power from the first frequency to a second frequency within a specified frequency range according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216), and may transmit the output power having the second frequency to the external electronic device (e.g., the electronic device 104). The second frequency may be within the specified frequency range and may be higher than the first frequency. In this case, the duty ratio of the output power having the second frequency may be 50:50.

[0135] Figure 5 FIG. 1 is a diagram showing that an output power having a first frequency is generated by controlling an input voltage so that an inverter including a plurality of gate input terminals performs an ON operation (conduction operation) and an OFF operation (cut-off operation) at different ratios during a first period according to an embodiment of the present disclosure. Figure 3 A flowchart of the operation described in operation 307 in FIG.

[0136] According to various embodiments, the electronic device 101 can generate output power having a first frequency in operation 501 by controlling multiple gate input terminals of the inverter in an anti-symmetric manner according to the control of the processor 120 or the control circuit (for example, the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0137] According to various embodiments, when a request to reduce the output power is received from the external electronic device 104, the electronic device 101 can generate output power having a first frequency by controlling multiple gate input terminals of the inverter in an anti-symmetric manner in operation 501 according to the control of the processor 120 or the control circuit (for example, the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0138] According to various embodiments, the electronic device 101 may change Figure 6 The FET of the first path of the inverter 601 (eg, Figure 6 The on-time of the FET 611 or 614) of the second path is different from that of the FET of the second path (e.g., Figure 6 The ratio of the on-time of FET 612 or 613).

[0139] According to various embodiments, the electronic device 101 may control multiple gate input terminals of the inverter in an anti-symmetrical manner by applying different on-time (or on-power) ratios to multiple gates of the inverter.

[0140] According to various embodiments, the electronic device 101 can determine in operation 503 whether the ratio of ON operations (conduction operations) to OFF operations (cut-off operations) of multiple gate input terminals is less than or equal to a specified ratio according to the control of the processor 120 or the control circuit (for example, the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0141] According to various embodiments, when a request to reduce the output power is received from the external electronic device 104, the electronic device 101 can determine in operation 503 whether the ratio of ON operations (conduction operations) to OFF operations (cut-off operations) of multiple gate input terminals is less than or equal to a specified ratio according to the control of the processor 120 or the control circuit (for example, the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0142] According to various embodiments, the electronic device 101 can determine in operation 503 whether the duty cycle of the output power from the inverter is less than or equal to the first specified duty cycle according to the control of the processor 120 or the control circuit (for example, the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0143] According to various embodiments, when a request to reduce the output power is received from the external electronic device 104, the electronic device 101 can determine in operation 503 whether the duty cycle of the output power from the inverter is less than or equal to a first specified duty cycle according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0144] According to various embodiments, the first designated duty ratio in operation 503 may be 30:70, which is a ratio of power sent to the coil after being output from the inverter to power not sent to the coil during the first period.

[0145] According to various embodiments, the specified ratio may be 30:70, which is the ratio of ON operation (conduction operation) to OFF operation (disconnection operation) during the first period. The electronic device 101 may determine in operation 503 that the ratio of ON operation (conduction operation) to OFF operation (cut-off operation) of the plurality of gate input terminals during the first period is 30:70 according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0146] According to various embodiments, if it is determined that the ratio of ON operations (conduction operations) to OFF operations (cut-off operations) of multiple gate input terminals exceeds a specified ratio, the electronic device 101 can perform operation 501 according to the control of the processor 120 or the control circuit (for example, the power transmission circuit 210 or the wireless charging transmission / receiving circuit 216).

[0147] According to various embodiments, it is determined that the ratio of ON operations (conduction operations) to OFF operations (cut-off operations) of multiple gate input terminals is less than or equal to a specified ratio, and the electronic device 101 can perform operation 505 according to the control of the processor 120 or the control circuit (for example, the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0148] According to various embodiments, the electronic device 101 may generate output power having a first frequency by modulating the phase of the voltage to the plurality of gate input terminals of the inverter according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216) in operation 505. The output power in operation 505 may be lower than the output power in operation 501.

[0149] According to various embodiments, when a request to reduce the output power is received from the external electronic device 104, the electronic device 101 can generate output power having a first frequency by modulating the phase of the voltage to multiple gate input terminals of the inverter in operation 505 according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0150] According to various embodiments, in operation 505, the electronic device 101 may set the ratio (e.g., 50:50) of the ON operation (conduction operation) to the OFF operation (cutoff operation) of the plurality of gate input terminals to be higher than a specified ratio, may modulate the phase of the voltage input to the plurality of gate input terminals of the inverter, and may generate output power having a first frequency. For example, the electronic device 101 may Figure 6 The FET of the first path of the inverter 601 (eg, Figure 6 The on-time of the FET 611 or 614) of the second path is different from that of the FET of the second path (e.g., Figure 6 The ratio of the on-time of the FET 612 or 613 of the first path) is set to 50:50, and the phase of the voltage input to the gate can be modulated so that the FET of the first path (for example, Figure 6 FET 611 or 614) and the conduction operation of the second path FET (for example, Figure 6 The on-state operation of FET 612 or 613).

[0151] According to various embodiments, when the electronic device 101 can modulate the phase of the voltage to multiple gate input terminals of the inverter in operation 505, the ratio of the time to establish an electrical path from a first path to a coil (e.g., coil 228) to the time to establish an electrical path from a second path to the coil (e.g., coil 228) can be changed.

[0152] According to various embodiments, the electronic device 101 can determine in operation 507 whether the duty cycle of the output power from the inverter is greater than or equal to a specified duty cycle according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0153] According to various embodiments, the electronic device 101 can determine in operation 507 whether the duty cycle of the output power from the inverter is greater than or equal to a second specified duty cycle according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0154] According to various embodiments, when a request to reduce the output power is received from the external electronic device 104, the electronic device 101 can determine in operation 507 whether the duty cycle of the output power from the inverter is greater than or equal to a second specified duty cycle according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0155] According to various embodiments, the specified duty ratio in operation 507 may be 35:65, which is a ratio of the power sent to the coil after being output from the inverter during the first period to the power not sent to the coil. The electronic device 101 may determine in operation 507 whether the duty ratio of the output power of the inverter during the first period is 35:65 according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0156] According to various embodiments, if it is determined that the duty cycle of the output power is greater than or equal to the specified duty cycle, the electronic device 101 can operate 501 according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0157] According to various embodiments, if it is determined that the duty cycle of the output power is less than or equal to the specified duty cycle, the electronic device 101 can operate 505 according to the control of the processor 120 or the control circuit (e.g., the power transmission circuit 210 or the wireless charging transmission / reception circuit 216).

[0158] Figure 6 is a diagram illustrating an inverter 601 including a transmitting coil 602 and a plurality of gates of an electronic device 101 according to an embodiment of the present disclosure.

[0159] The inverter 601 including a plurality of gates may be a full-bridge inverter including a plurality of field effect transistors (FETs) 611, 612, 613, and 614. The first FET 611 is connected in series to the third FET 613, and the second FET 612 is connected in series to the fourth FET 614. A constant voltage (Vdc) is provided to the drains of the first FET 611 and the second FET 612. The sources of the third FET 613 and the fourth FET 614 may be grounded. A node connecting the first FET 611 and the third FET 613 and a node connecting the second FET 612 and the fourth FET 614 may generate an output voltage (Vac(f)) having a predetermined frequency via the capacitor 620 and the transmitting coil 602. The first electronic device 101 can generate output power (Vac(f)) having a predetermined frequency by controlling the gate input voltages of the first FET 611, the second FET 612, the third FET 613, and the fourth FET 614, and can transmit the power to an external electronic device (e.g., the electronic device 104) via the transmitting coil 602. The external electronic device (e.g., the electronic device 104) can receive the power via the receiving coil 603.

[0160] Figure 7 1 shows a time-voltage curve diagram illustrating a wireless power control method of the electronic device 101 according to an embodiment of the present disclosure, Figure 8 shows a time-voltage graph illustrating a wireless power control method of the electronic device 101 according to the present disclosure, Fig. 9 A time-voltage graph illustrating a wireless power control method of the electronic device 101 according to an embodiment of the present disclosure is shown.

[0161] refer to Figure 3 , Figure 5 and Figure 6 , Figure 7 The graphs 701 and 703 are associated with the operation of controlling the inverter 601 including a plurality of gates at the same ratio during the first period (a).

[0162] In graph 701, a high voltage (FET on voltage) is applied to the gate of the first FET 611 and the gate of the fourth FET 614. Meanwhile, in graph 703, a low voltage (FET off voltage) is applied to the gate of the second FET 612 and the gate of the third FET 613.

[0163] In graph 701, a high voltage may be supplied to the gate of the first FET 611 and the gate of the fourth FET 614, and then a low voltage may be supplied to the gate of the first FET 611 and the gate of the fourth FET 614. Meanwhile, in operation 703, a low voltage may be supplied to the gate of the second FET 612 and the gate of the third FET 613, and then a high voltage may be supplied to the gate of the second FET 612 and the gate of the third FET 613.

[0164] In this case, voltage is supplied to the first FET 611, the second FET 612, the third FET 613, and the fourth FET 614 based on the same time ratio, and therefore, the duty ratio of the output power based on the input voltage or the duty ratio of the square wave may be 50.

[0165] refer to Figure 8 , graphs 801 and 803 are associated with controlling the inverter 601 including a plurality of gates at different ratios (or in an anti-symmetric manner) during a first period (a).

[0166] In graph 801, a high voltage (FET on voltage) is provided to the gate of the first FET 611 and the gate of the fourth FET 614. At the same time, in operation 803, a low voltage (FET off voltage) is provided to the gate of the second FET 612 and the gate of the third FET 613.

[0167] In operation 801, a high voltage may be supplied to the gate of the first FET 611 and the gate of the fourth FET 614, and then a low voltage may be supplied to the gate of the first FET 611 and the gate of the fourth FET 614. Meanwhile, in operation 803, a low voltage may be supplied to the gate of the second FET 612 and the gate of the third FET 613, and then a high voltage may be supplied to the gate of the second FET 612 and the gate of the third FET 613.

[0168] In this case, a voltage (e.g., a high voltage) is provided to the gates of the first FET 611, the second FET 612, the third FET 613, and the fourth FET 614 based on different time ratios, and therefore, the duty cycle of the output power based on the input voltage or the duty cycle of the square wave can be less than 50 (e.g., 30).

[0169] refer to Fig. 9 , graphs 901 , 903 , 905 , and 907 are associated with operation of an inverter 601 including a plurality of gates via phase modulation control.

[0170] In the graph 901, a high voltage is supplied to the gate of the first FET 611. In the graph 903, a high voltage may be supplied to the gate of the fourth FET 614 a predetermined period after the high voltage is supplied to the gate of the first FET 611.

[0171] In graphs 901 and 903 , the inverter 601 operates and generates power only when the first FET 611 and the fourth FET 614 are turned on together (the overlapping portion in the graphs).

[0172] In addition, a high voltage is supplied to the gate of the first FET 611 in the graph 901, and at the same time a low voltage is supplied to the gate of the second FET 612 in the graph 905. In the graph 903, a high voltage is supplied to the gate of the fourth FET 614, and at the same time, in the graph 907, a low voltage is supplied to the gate of the third FET 613. In the graphs 905 and 907, the inverter 601 operates and generates power only when the second FET 612 and the third FET 613 are turned on together (overlapping portion in the figure). Therefore, the first FET 611 and the fourth FET 614 are turned on together, or the second FET 612 and the third FET 613 are turned on together in a period corresponding to a predetermined time difference (or a predetermined phase difference) therebetween. In this case, the duty ratio of the output power based on the input voltage or the duty ratio of the square wave can be less than 50 (for example, 30).

[0173] Fig.10 is a frequency-power graph illustrating a wireless power control method of the electronic device 101 according to an embodiment of the present disclosure.

[0174] refer to Fig.10 , the electronic device 101 may increase the frequency of the output power to a specified frequency (eg, 148.5 Khz) and may reduce the level of the output power in order to control the output power transmitted to an external electronic device (eg, the electronic device 104).

[0175] When the frequency of the output power reaches a specified frequency (e.g., 148.5Khz), the electronic device 101 can control the multiple gate input terminals of the inverter in an anti-symmetrical manner, and can generate output power having a first frequency. In addition, the electronic device 101 can generate output power having a first frequency by modulating the phase of the voltage input to the multiple gate input terminals of the inverter. According to various embodiments, in order to control the multiple gate input terminals of the inverter in an anti-symmetrical manner, the electronic device 101 can change Figure 6 The FET of the first path of the inverter 601 (eg, Figure 6 The on-time of the FET 611 or 614) of the second path is different from that of the FET of the second path (e.g., Figure 6 The ratio of the on-time of FET 612 or 613). Figure 6 The FET of the first path of the inverter 601 (eg, Figure 6 The on-time of the FET 611 or 614) of the second path is different from that of the FET of the second path (e.g., Figure 6 The ratio of the on-time of FET 612 or 613) can be 30:70.

[0176] Fig.11 is a diagram showing an electronic device 101 and an external electronic device 104 according to an embodiment of the present disclosure, Fig.12 is a diagram illustrating an electronic device 101 and an external electronic device 104 according to an embodiment of the present disclosure.

[0177] refer to Fig.11 , the electronic device 101 that sends power can be a mobile terminal, and the external electronic device 104 that receives power can be one of various wearable devices or mobile terminals.

[0178] refer to Fig.12 , the electronic device 101 that sends power may be a charging pad, and the external electronic device 104 that receives power may be one of various wearable devices or mobile terminals.

[0179] The electronic device according to various embodiments disclosed in the present disclosure may be various types of 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.

[0180] 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, equivalents or alternative forms for the 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 all possible combinations of 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 should be understood that if an element (e.g., a first element) is referred to as being “coupled with” or “connected with” with or without the term “operably” or “communicatively,” it means that the element can be coupled to another element directly (e.g., wired), wirelessly, or via a third element.

[0181] 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).

[0182] The various embodiments described herein may be implemented as software (e.g., program 440) including one or more instructions stored in a storage medium (e.g., internal memory 436 or external memory 438) that can be read by a machine (e.g., electronic device 401). For example, a processor (e.g., processor 420) of the machine (e.g., electronic device 401) may call at least one of the one or more instructions stored in the storage medium and execute the at least one instruction. 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 executed 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.

[0183] 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 released in the form of a machine-readable storage medium (e.g., a compact disk read-only memory (CD-ROM)), or may be downloaded via an application store (e.g., Play Store TM ) The computer program product may be published (e.g., downloaded or uploaded) online, or the computer program product 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 memory of a manufacturer's server, an application store's server, or a forwarding server).

[0184] 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 or operations in the above-mentioned components or operations may be omitted, or one or more other components or operations 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.

[0185] While the present disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents.

Claims

1. An electronic device, comprising: Coil; an inverter including a plurality of gate input terminals electrically connected to the coil; as well as at least one processor, the at least one processor being configured to: controlling the plurality of gate input terminals of the inverter in an anti-symmetrical manner to generate output power, receiving an output power reduction request from an external electronic device, determining, based on receiving the output power reduction request, whether a ratio of on-operations to off-operations of the plurality of gate input terminals of the inverter is less than or equal to a specified ratio; as well as Based on the ratio of the on operation to the off operation of the plurality of gate input terminals of the inverter being less than or equal to the specified ratio, modulating the phase of the voltage input to the plurality of gate input terminals of the inverter to generate output power; Wherein, the at least one processor is further configured to: controlling the plurality of gate inputs of the inverter in the anti-symmetric manner by applying different on-time ratios to a plurality of gates for the plurality of gate inputs of the inverter; and The output power generated by controlling the plurality of gate input terminals of the inverter in the anti-symmetrical manner is greater than the output power generated by modulating the phase of the voltage input to the plurality of gate input terminals of the inverter.

2. The electronic device according to claim 1, wherein: The at least one processor is further configured to: determining whether a duty cycle of output power output from the inverter is greater than or equal to a specified duty cycle; as well as Based on the duty cycle of the output power being greater than or equal to the designated duty cycle, the plurality of gate input terminals of the inverter are controlled in the anti-symmetrical manner to generate output power.

3. The electronic device according to claim 1, wherein: Based on the fact that a ratio of the on-operation to the off-operation of the plurality of gate input terminals of the inverter is less than or equal to a specified ratio, the at least one processor is further configured to: An input voltage is controlled based on modulation of a phase of a voltage input to the plurality of gate input terminals of the inverter so that the inverter performs an on operation and an off operation at the same ratio.

4. The electronic device according to claim 1, wherein: The output power reduction request is received based on at least one of: The battery of the external electronic device enters the CV interval, The battery of the external electronic device is fully charged, or Heat is being generated from the external electronic device.

5. The electronic device according to claim 1, wherein: Based on receiving the output power reduction request, the at least one processor is further configured to determine whether the frequency of the output power is within a specified frequency range, and The output power reduction request is received from the electronic device through at least one of out-of-band communication or in-band communication.

6. A method for controlling power of wireless charging of an electronic device, the method comprising: generating output power by controlling a plurality of gate inputs of an inverter in an anti-symmetrical manner; receiving an output power reduction request from an external electronic device; determining, based on receiving the output power reduction request, whether a ratio of on-operations to off-operations of the plurality of gate input terminals of the inverter is less than or equal to a specified ratio; as well as generating output power by modulating the phase of a voltage input to the plurality of gate input terminals of the inverter based on that a ratio of an on operation to an off operation of the plurality of gate input terminals of the inverter is less than or equal to a specified ratio; Wherein, generating output power by controlling the plurality of gate input terminals of the inverter in the anti-symmetric manner comprises: controlling the plurality of gate inputs of the inverter in the anti-symmetric manner by applying different on-time ratios to a plurality of gates for the plurality of gate inputs of the inverter; and The output power generated by controlling the plurality of gate input terminals of the inverter in the anti-symmetrical manner is greater than the output power generated by modulating the phase of the voltage input to the plurality of gate input terminals of the inverter.

7. The method according to claim 6, further comprising: determining whether a duty cycle of output power output from the inverter is greater than or equal to a specified duty cycle; as well as Based on determining that the duty cycle of the output power is greater than or equal to the specified duty cycle, output power is generated by controlling the plurality of gate input terminals of the inverter in the anti-symmetrical manner.

8. The method according to claim 6, based on the ratio of the on operation to the off operation of the plurality of gate input terminals of the inverter being less than or equal to the specified ratio, the method further comprising: Based on modulation of the phase of the voltage input to the plurality of gate input terminals of the inverter, the input voltage is controlled so that the inverter performs an on operation and an off operation at the same ratio.

9. The method according to claim 6, wherein: The output power reduction request is received based on at least one of: The battery of the external electronic device enters the CV interval, The battery of the external electronic device is fully charged, or Heat is being generated from the external electronic device.

10. The method according to claim 6, further comprising: Based on receiving the output power reduction request, it is determined whether the frequency of the output power is within a specified frequency range.

11. The method according to claim 6, further comprising: The output power reduction request is received from the electronic device through at least one of out-of-band communication or in-band communication.

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