Electronic device and driving method therefor

Abstract

Embodiments of the present disclosure relate to an electronic device for wirelessly transmitting power or wirelessly receiving power, and a driving method therefor, the driving method comprising: outputting a first ping and / or a second ping through a coil; counting an N value, which is the number of times the first ping and / or the second ping are cumulatively output; if the N value is less than a designated first threshold value and a response of an external device to the first ping is received, performing first negotiation communication for first wireless charging with the external device, wherein the first wireless charging is wireless charging based on an alignment state of the electronic device and the external device using magnets; if the N value is less than the first threshold value and a response of the external device to the second ping is received, re-outputting the first ping and / or the second ping; and, if the N value is greater than or equal to the first threshold value, performing, with the external device, second negotiation communication for second wireless charging, which is independent of recognition of the magnets.

Description

Electronic device and method of driving the same

[0001] Embodiments of the present disclosure relate to an electronic device for wirelessly transmitting or receiving power and a method of driving the same.

[0002] The Wireless Power Consortium (WPC) is an organization established to develop and promote the Qi wireless charging standard. According to the Qi standard, the baseline power profile (BPP) supports wireless charging up to approximately 5W, while the extended power profile (EPP) supports fast wireless charging up to approximately 15W.

[0003] According to BPP, an operation for wirelessly charging a battery of a power receiving device (e.g., a smartphone) and a power supply device (e.g., a wireless charging pad) between a power receiving device and a power supply device may include a signal strength (SS) identification (ID) step, a configuration step, and a power transfer step. In the SSID step, the power supply device can identify the power receiving device based on a response of the power receiving device to a ping signal (or wakeup signal) transmitted by the power supply device. In the configuration step, the power supply device can set a power value to be transmitted to the power receiving device through data communication with the power receiving device. In the power transfer step, the power supply device can transmit power having the set power value to the power receiving device through a coil.

[0004] According to EPP, the wireless charging operation may further include a negotiation step and a calibration step performed after the setup step. After the calibration step is completed, a power transfer step may be performed. In the negotiation step, the power supply device may verify the quality of the electrical coupling between the transmitting coil and the receiving coil and negotiate with the power receiving device the maximum power that can be supplied to the power receiving device. In the calibration step, the power supply device may measure power loss (e.g., friendly metal loss) and, based on the measured power loss, calibrate the value of the power to be supplied to the power receiving device, thereby improving the accuracy of foreign object detection (e.g., foreign object detection (FOD)).

[0005] The above information may be provided as background information to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above is applicable as prior art in connection with the present disclosure.

[0006] Recently, a separate technology, magnetic power profile (MPP), has been introduced, separate from BPP and EPP. Unlike BPP and EPP, MPP supports wireless charging based on the alignment between a power receiving device (e.g., a smartphone) and a power supply device (e.g., a wireless charging pad) using magnets.

[0007] MPP has the advantage of enabling high-efficiency wireless charging by using magnets to secure the coils of the power receiver and power supply to the optimal positions. However, MPP can suffer from a problem where charging efficiency is reduced if the magnets are incorrectly positioned. For example, users typically attach cover accessories to their smartphones for protection and to express their individuality. These cover accessories can be mass-produced to include magnets that comply with the MPP standard. However, if the cover accessory is not a genuine product from the manufacturer, there may be process deviations in the magnets of the cover accessory, which can cause repeated charging errors (e.g., charging failures) during wireless charging according to the MPP standard.

[0008] Embodiments of the present disclosure can provide an electronic device and a driving method thereof that support wireless charging by fixing a coil of a power receiving device and a coil of a power supply device at optimal positions using a magnet, but performs wireless charging without considering the magnet when the coil of the power receiving device and the coil of the power supply device are not aligned at the optimal positions.

[0009] The technical problems to be achieved in the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by a person having ordinary skill in the technical field to which the present invention pertains from the description below.

[0010] An electronic device according to one embodiment of the present disclosure includes a coil, a transmitter IC configured to wirelessly transmit power to an external device through the coil, and a control unit, wherein the control unit outputs a first ping and / or a second ping through the coil, counts a value N that is a cumulative number of times the first ping and / or the second ping is output, and when the value N is less than a specified first threshold and a response of the external device to the first ping is received, performs a first negotiation communication for a first wireless charging with the external device, wherein the first wireless charging is wireless charging based on an alignment state of the electronic device and the external device using a magnet, and when the value N is less than the first threshold and a response of the external device to the second ping is received, outputs the first ping and / or the second ping again, and when the value N is greater than or equal to the first threshold, performs a second negotiation communication for a second wireless charging independent of recognition of the magnet with the external device.

[0011] According to one embodiment of the present disclosure, an electronic device includes a coil, a wireless charging circuit configured to wirelessly receive power from an external device through the coil, a processor, and a memory storing instructions, wherein the instructions, when executed by the processor, cause the electronic device to: receive a ping from the external device through the coil, and, upon receiving the ping, determine whether the processor is in a wake-up state, and, if the processor is in a wake-up state, determine whether a cover accessory including a magnet is coupled to the electronic device, and, if the cover accessory is coupled to the electronic device, count a value N that is the number of times the ping has been accumulated and received, and, if the value N is less than a first threshold value, perform a first negotiation communication for a first wireless charging with the external device, wherein the first wireless charging is wireless charging based on an alignment state of the electronic device and the external device using a magnet, and, if the value N is greater than or equal to the first threshold value, perform a second negotiation communication for a second wireless charging independent of recognition of the magnet with the external device.

[0012] A driving method of an electronic device configured to wirelessly transmit power to an external device according to one embodiment of the present disclosure may include an operation of sequentially outputting a first ping and a second ping through a coil, an operation of counting a value N that is a cumulative number of times the first ping and the second ping are output, an operation of performing a first negotiation communication for a first wireless charging with the external device when the value N is less than a specified first threshold and a response of the external device to the first ping is received, wherein the first wireless charging is wireless charging based on an alignment state of the electronic device and the external device using a magnet, an operation of re-outputting the first ping and the second ping when the value N is less than the first threshold and a response of the external device to the second ping is received, and an operation of performing a second negotiation communication for a second wireless charging independent of recognition of the magnet with the external device when the value N is greater than or equal to the first threshold.

[0013] A driving method of an electronic device configured to wirelessly receive power from an external device according to one embodiment of the present disclosure may include: receiving a ping from the external device through a coil; determining, upon receiving the ping, whether a processor is in a wake-up state; determining, upon receiving the ping, whether a cover accessory including a magnet is coupled to the electronic device; counting, upon receiving the cover accessory from the electronic device, a value N that is the number of times the ping is accumulated and received; performing, upon receiving the value N below a first threshold value, a first negotiation communication for a first wireless charging operation with the external device, wherein the first wireless charging operation is wireless charging based on an alignment state of the electronic device and the external device using a magnet; and performing, upon receiving the value N above a first threshold value, a second negotiation communication for a second wireless charging operation that is independent of recognition of the magnet with the external device.

[0014] According to embodiments of the present disclosure, by performing wireless charging without considering magnets when the coil of the power receiving device and the coil of the power supply device are not aligned in the optimal position, it is possible to prevent an issue of repeated charging errors (e.g., charging failure) during wireless charging.

[0015] In addition, various effects may be provided, either directly or indirectly, through this document.

[0016] Other aspects, features and advantages according to specific embodiments of the present disclosure will become more apparent from the accompanying drawings and the corresponding description.

[0017] FIG. 1 is a block diagram of an electronic device within a network environment according to one embodiment.

[0018] FIG. 2 illustrates a wireless charging system according to one embodiment.

[0019] Figure 3 is a flowchart illustrating the operation of a power supply device according to one embodiment.

[0020] FIG. 4 is an example of a scenario in which a power supply device according to one embodiment performs MPP charging.

[0021] FIG. 5 is an example of a scenario in which a power supply device according to one embodiment performs BPP charging (or EPP charging).

[0022] FIG. 6 is a flowchart illustrating an operation of a power supply device according to one embodiment to determine whether to charge MPP based on a K value indicating the alignment state of a coil.

[0023] FIG. 7 is an example of a scenario in which a power supply device according to one embodiment performs MPP charging based on a K value greater than or equal to a threshold value.

[0024] FIG. 8 is an example of a scenario in which a power supply device according to one embodiment performs BPP charging (or EPP charging) based on a K value below a threshold value.

[0025] Fig. 9 is a graph exemplarily showing the correlation between the gain and the K value of a wireless charging system according to one embodiment.

[0026] Fig. 10 is an example of a notification output by a power receiving device according to one embodiment.

[0027] Fig. 11 is a flowchart illustrating the operation of a power receiving device according to one embodiment.

[0028] Fig. 12 is a flowchart illustrating the operation of a wireless charging system according to one embodiment.

[0029] Each of the embodiments described with reference to the drawings of the present disclosure can be independently configured as a single embodiment. For example, the embodiments of FIG. 1 and FIG. 2 can each be independently configured. Each of the embodiments described with reference to the drawings of the present disclosure can operate independently as a single embodiment. For example, the embodiments of FIG. 1 and FIG. 2 can each operate independently.

[0030] At least two embodiments described with reference to the drawings of the present disclosure may be combined and configured. For example, at least a portion of the embodiment of FIG. 1 and at least a portion of the embodiment of FIG. 2 may be combined and configured. At least two embodiments described with reference to the drawings of the present disclosure may be combined and operated. For example, at least a portion of the embodiment of FIG. 1 and at least a portion of the embodiment of FIG. 2 may be combined and operated.

[0031] When at least two embodiments described with reference to the drawings of the present disclosure are combined, at least some of the components and / or at least some of the operations included in each embodiment may be omitted. For example, when the embodiment of FIG. 1 and the embodiment of FIG. 2 are combined, at least some of the components and / or at least some of the operations included in the embodiment of FIG. 1 may be omitted, and at least some of the components and / or at least some of the operations included in the embodiment of FIG. 2 may be omitted.

[0032] FIG. 1 is a block diagram of an electronic device (101) within a network environment (100) according to various embodiments. Referring to FIG. 1, in the network environment (100), the electronic device (101) may communicate with the electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of the electronic device (104) or the server (108) via a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In some embodiments, the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added. In some embodiments, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0033] The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or calculations. According to one embodiment, as at least a part of the data processing or calculations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or a secondary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor)) that can operate independently or together therewith. For example, if the electronic device (101) includes a main processor (121) and a secondary processor (123), the secondary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a specified function. The secondary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0034] The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0035] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0036] The program (140) may be stored as software in the memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0037] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0038] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0039] The display module (160) can visually provide information to an external party (e.g., a user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. In one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0040] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

[0041] The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0042] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) with an external electronic device (e.g., the electronic device (102)). In one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0043] The connection terminal (178) may include a connector through which the electronic device (101) may be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0044] A haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. In one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0045] The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0046] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least a part of a power management integrated circuit (PMIC).

[0047] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0048] The communication module (190) may support the establishment of 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 the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one 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 module). Among these communication modules, the corresponding communication module can communicate with an external electronic device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0049] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), an external electronic device (e.g., the electronic device (104)), or a network system (e.g., the second network (199)). According to one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0050] The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module (197) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method 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). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. In some embodiments, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (197).

[0051] According to various embodiments, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.

[0052] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0053] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0054] Electronic devices according to various embodiments disclosed in the present disclosure may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to embodiments of the present disclosure are not limited to the aforementioned devices.

[0055] The various embodiments of the present disclosure and the terminology used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In the present disclosure, each of the phrases "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" can include any one of the items listed together in the corresponding phrase among the phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0056] The term "module" used in various embodiments of the present disclosure may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0057] Various embodiments of the present disclosure may be implemented as software (e.g., a program (140)) including one or more commands stored in a storage medium (e.g., an internal memory (136) or an external memory (138)) readable by a machine (e.g., an electronic device (101)). For example, a processor (e.g., a processor (120)) of the machine (e.g., an electronic device (101)) may call at least one command among the one or more commands stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one command called. The one or more commands may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0058] According to one embodiment, the method according to various embodiments disclosed in the present disclosure may be provided as a computer program product. The computer program product may be traded between sellers and buyers as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or may be provided through an application store (e.g., Play Store). TM ) or directly between two user devices (e.g., smart phones), online distribution (e.g., downloading or uploading). In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0059] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0060] FIG. 2 illustrates a wireless charging system according to one embodiment.

[0061] Referring to FIG. 2, a wireless charging system according to one embodiment may include a power supply device (201) (e.g., electronic device (102) of FIG. 1) and a power receiving device (202) (e.g., electronic device (101) of FIG. 1).

[0062] A power supply device (201) (e.g., the electronic device (102) of FIG. 1) can transmit power wirelessly. A power receiving device (202) (e.g., the electronic device (101) of FIG. 1) can receive power wirelessly. The wireless charging system can perform wireless charging based on a designated charging protocol. The designated charging protocol can include a baseline power profile (BPP), an extended power profile (EPP), and a magnetic power profile (MPP) according to the Qi standard.

[0063] A wireless charging system according to one embodiment can support general wireless charging (or low-speed wireless charging) of up to about 5 W by supporting BPP. BPP can be low-speed wireless charging based on one-way communication in which data is transmitted only from a power receiving device (202) to a power supply device (201). During wireless charging according to BPP, the power supply device (201) can wirelessly transmit power of up to about 5 W to the power receiving device (202).

[0064] A wireless charging system according to one embodiment can support high-speed wireless charging of up to about 15 W by supporting EPP. EPP can be high-speed wireless charging based on two-way communication between a power supply device (201) and a power reception device (202). During wireless charging according to EPP, the power supply device (201) can wirelessly transmit power of up to about 15 W to the power reception device (202).

[0065] A wireless charging system according to one embodiment can support high-speed wireless charging of about 15 W or more based on the alignment state of a power supply device (201) and a power reception device (202) using magnets by supporting MPP. When the wireless charging system operates in the MPP charging mode, a higher power can be wirelessly transmitted than when the wireless charging system operates in the EPP charging mode. In wireless charging according to MPP, after the power supply device (201) and the power reception device (202) confirm each other's alignment state using magnets, the power supply device (201) can wirelessly transmit power of about 15 W or more to the power reception device (202).

[0066] According to one embodiment, the wireless charging system basically attempts wireless charging based on MPP when it supports MPP, but if the optimal alignment state using magnets between the power supply device (201) and the power reception device (202) is not confirmed, wireless charging based on EPP or BPP can be performed to prevent recurrence of charging errors. That the wireless charging system according to one embodiment basically attempts wireless charging based on MPP may mean that wireless charging based on MPP is attempted first. The operations of each of the power supply device (201) and the power reception device (202) according to one embodiment of the present invention will be described in detail below with reference to FIGS. 3 to 11.

[0067] According to one embodiment, the power receiving device (202) may include a coil (or conductive pattern) (210), a wireless charging circuit (220), a power management circuit (230), a battery (240) (e.g., the battery 189 of FIG. 1), a memory (288) (e.g., the memory 130 of FIG. 1), and a processor (299) (e.g., the processor 120 of FIG. 1). According to one embodiment, the power supply device (201) may include components that are the same or substantially the same as at least some of the power receiving device (202). For example, the power supply device (201) may include a coil that is at least partially similar to the coil (210) described with reference to FIG. 2, a transmission IC configured to wirelessly transmit power through the coil, and a control unit for controlling the overall operation of the power supply device (201).

[0068] In one embodiment, the wireless charging circuit (220) (e.g., a circuit configured in the power management module (188) of FIG. 1) may be woken up by a power signal (e.g., a digital ping) received from the power supply device (201) via the coil (210). The wireless charging circuit (220) may be configured to perform a given function (e.g., charging the battery (240) and communicating with the power supply device (201) for the same) using the power supplied from the power supply device (201). In one embodiment, the wireless charging circuit (220) may include a rectifier (250), a DC-DC converter (255), a communication circuit (260), and a control circuit (270). In one embodiment, the rectifier (250), the DC-DC converter (255), the communication circuit (260), and the control circuit (270) may be configured as a single integrated circuit (IC). For example, one IC may be configured to perform operations for rectification, DC-DC converting, communication, and control of a wireless charging circuit (200).

[0069] According to one embodiment, the control circuit (270) may be configured in a separate IC from at least one of the communication circuit (260), the rectifier (250), and the DC-DC converter (255).

[0070] According to one embodiment, at least one of the rectifier (250), the DC-DC converter (255), the communication circuit (260), and the control circuit (270) may be configured in one IC together with the power management circuit (230).

[0071] According to one embodiment, the power management circuit (230) may include a converter for supplying power to the battery (240) and a load (e.g., a processor (299). For example, the converter may include a buck-boost charger and / or a direct charger. The direct charger may be a switched capacitor voltage divider (SCVD) converter and may vary the input voltage and output voltage in an n:1 ratio. The power management circuit (230) may include a power management integrated circuit (PMIC) for supplying appropriate voltage and current to various loads (e.g., a processor, a display, or a sensor).

[0072] The memory (288) (e.g., the memory (130) of FIG. 1) and the processor (299) (e.g., the processor (120) of FIG. 1) may be a load circuit (or system) driven by power supplied from the wireless charging circuit (220) and / or power supplied from the battery (240) via the power management circuit (230). In addition, the load circuit may include a display (e.g., the display module (160) of FIG. 1) and / or a communication circuit (e.g., the communication module (190) of FIG. 1).

[0073] The coil (210) may be a spiral type coil wound multiple times in a clockwise or counterclockwise direction. When the power receiving device (202) is placed on the charging pad of the power supply device (201), the coil (210) may be aligned parallel to the coil of the power supply device (201). The power receiving device (202) may receive power from the power supply device (201) through electrical coupling between a transmitting coil (e.g., a coil of the power supply device (201)) and a receiving coil (e.g., a coil (210)). The coil (210) may resonate at the same frequency as the coil of the power supply device (201) resonates. The power receiving device (202) may further include a resonance circuit to cause the coil (210) to resonate at a specific frequency (e.g., a frequency specified in the WPC (Wireless Power Consortium) standard). The coil (210) may be used as an antenna for data communication (e.g., in-band communication) in addition to power reception. According to one embodiment, the power reception device (202) may include a plurality of coils (210).

[0074] The rectifier (250) may be configured to rectify (i.e., convert current from alternating current (AC) to direct current (DC)) power received from the power supply (201) through the coil (210) and output it to the DC-DC converter (255). The DC-DC converter (e.g., low dropout (LDO)) (255) may convert the voltage value (or in other words, voltage level) of the power received from the rectifier (250) by being rectified by the rectifier (250) into a designated voltage value and output it to the power management circuit (230).

[0075] A power management circuit (230) (e.g., a circuit configured in the power management module (188) of FIG. 1) can control the voltage value and / or current value (in other words, the current level) of power received from the wireless charging circuit (220) and supply the power to the battery (240) and the load circuit. For example, the power management circuit (230) may include a buck converter that steps down the voltage of power supplied from the wireless charging circuit (220) and outputs it, and / or a boost converter that steps up the voltage of the received power and outputs it.

[0076] The communication circuit (260) may be configured to perform data communication (e.g., in-band communication) with the power supply device (201) through the coil (210) using power supplied from the power supply device (201) through the rectifier (250). For example, the communication circuit (260) may receive data from the control circuit (270), and transmit the received data to the power supply device (201) by loading the power signal received from the power supply device (201). A technique for modulating the amplitude and / or frequency of the power signal may be used as a method for loading the data onto the power signal. For example, the communication circuit (260) may change the amplitude of the power signal by controlling switching to open and close a switch located on an electrical path connecting the coil (210) and the ground of the power receiving device (202). The communication circuit (260) can demodulate a power signal transmitted from the power supply device (201) to the coil (210) and obtain data transmitted from the power supply device (201) to the power receiving device (202). The communication circuit (260) can transmit the obtained data to the control circuit (270).

[0077] The control circuit (270) can be woken up by a power signal (e.g., digital ping) supplied from the power supply device (201) through the rectifier (250). The control circuit (270) can be configured to perform data communication with the processor (299) through a communication interface equipped in the power receiving device (202) using the power supplied from the power supply device (201) through the rectifier (250) and to perform communication for charging the battery (240) with the power supply device through the communication circuit (260). For example, the control circuit (270) can obtain information on a charging state from the power supply device (201) through the communication circuit (260) and provide the obtained information to the processor (299) through the first communication interface (211) (e.g., I2C (inter integrated circuit)).

[0078] According to one embodiment, the control circuit (270) may set the charging mode of the wireless charging circuit (220) to an MPP mode or an EPP mode for fast charging of the battery (240) based on a signal received from the processor (299) (e.g., a microcontroller unit (MCU) or an application processor (AP)) via the second communication interface (222) (e.g., a general-purpose input / output (GPIO)). The control circuit (270) may set the charging mode of the wireless charging circuit (220) to a BPP mode based on the signal received from the processor (299), and the BPP mode may be a mode for charging the battery (240) at a relatively slow speed compared to the MPP mode or the EPP mode.

[0079] Figure 3 is a flowchart illustrating the operation of a power supply device (201) according to one embodiment.

[0080] The operations illustrated in FIG. 3 can be performed by the control unit of the power supply device (201).

[0081] At least some of the operations illustrated in FIG. 3 may be omitted. At least some of the operations mentioned with reference to other drawings in this disclosure may be additionally inserted before or after at least some of the operations illustrated in FIG. 3.

[0082] According to one embodiment, at least some of the operations illustrated in FIG. 3 may be performed sequentially.

[0083] According to one embodiment, at least some of the operations illustrated in FIG. 3 can be performed in parallel (simultaneously).

[0084] According to one embodiment, at least some of the operations illustrated in FIG. 3 may be performed with their order changed.

[0085] Hereinafter, the operation of a power supply device (201) according to one embodiment will be described with reference to FIG. 3.

[0086] In operation 310, an electronic device (201) according to an embodiment (e.g., a power supply device (201) of FIG. 2) may output a digital ping to wake up an external device (202) (e.g., a power reception device (202) of FIG. 2). For example, the electronic device (201) may output a digital ping having a frequency in a band of about 128 KHz. The digital ping may include a first ping and a second ping. The electronic device (201) may sequentially output the first ping and the second ping. For example, if a response is not received after outputting the first ping, the electronic device (201) may output the second ping. The output power of the first ping may be lower than the output power of the second ping. The electronic device (201) may adjust the output power by adjusting the duty and voltage of the digital ping. The external device (202) can transmit a response signal (e.g., a signal strength packet, SSP) to the electronic device (201) in response to the digital ping. According to one embodiment, the external device (202) can output a response signal in response to the digital ping, and the response signal can include an XID (extended identification data packet) packet indicating that MPP support is possible. For example, when the electronic device (201) receives an XID as a response signal from the external device (202) in response to the digital ping, the electronic device (201) can determine that the external device (202) is a device that supports MPP charging.

[0087] The term "MPP charging" used in various embodiments of the present disclosure may refer to wireless charging in which a power supply device (201) (e.g., the power supply device (201) of FIG. 2) wirelessly transmits power of about 15 W or more to a power receiving device (202) (e.g., the power receiving device (202) of FIG. 2) or may utilize a different frequency band (e.g., about 360 kHz) than other charging modes, and is based on an alignment state of an external device (202) other than an electronic device (201) using a magnet. It may be used interchangeably with terms such as "first wireless charging" and "MPP mode."

[0088] The term "first ping" used in various embodiments of the present disclosure means a digital ping signal having a lower output power than a second ping, and may be used interchangeably with terms such as "High K ping" or "first digital ping."

[0089] The term "second ping" used in various embodiments of the present disclosure means a digital ping signal having a higher output power than the first ping, and may be used interchangeably with terms such as "Low K ping" or "second digital ping."

[0090] In operation 320, the electronic device (201) according to one embodiment may count an N value, which is a cumulative output number of pings (e.g., a first ping and / or a second ping). After outputting the first ping, the electronic device (201) may obtain a K value indicating a degree of coupling between a coil of the electronic device (201) (e.g., a first coil) and a coil of an external device (202) (e.g., a second coil), and may increase the N value if the K value is less than a specific value. The electronic device (201) may receive a response to the second ping and may increase the N value when outputting the first ping again. The electronic device (201) may sequentially output the first ping and the second ping, and count the cumulative output number of sequentially outputting the first ping and the second ping. The N value counted by the electronic device (201) may indicate a cumulative number of times the electronic device (201) attempted MPP charging. In one embodiment, the electronic device (201) may receive a response signal after outputting a ping (e.g., a second ping), and if it is not in a suitable state to attempt MPP charging, it may add the accumulated output number and perform the ping output operation again. An increase in the N value counted by the electronic device (201) may mean that the accumulated number of times that the electronic device (201) attempted MPP charging but failed MPP charging increases. For example, the electronic device (201) may preferentially attempt MPP charging, but if at least one specified condition is not met, it may perform operation 310 of sequentially outputting the first ping and the second ping again. The electronic device (201) may perform operation 310 of sequentially outputting the first ping and the second ping again, while counting the N value, which is the accumulated repetition number.

[0091] In one embodiment, the electronic device (201) can transmit data regarding the N value to the external device (202). Accordingly, the external device (202) can also check the accumulated number of times MPP charging has been attempted, just like the electronic device (201).

[0092] In operation 330, the electronic device (201) according to one embodiment may determine whether the value N is less than a specified first threshold. If the value N is less than the specified first threshold (e.g., the result of operation 330 is YES), the electronic device (201) may perform operation 340. If the value N is greater than or equal to the specified first threshold (e.g., the result of operation 330 is NO), the electronic device (201) may perform operation 350. According to one embodiment, the electronic device (201) may retry MPP charging repeatedly if the value N, which is the cumulative number of times MPP charging has been attempted, is less than the specified first threshold. The electronic device (201) may perform operation 340 as an operation of attempting MPP charging.

[0093] In operation 340, the electronic device (201) according to one embodiment may determine whether a response signal is received from the external device (202) after outputting the first ping. If the electronic device (201) receives a response signal from the external device (202) after outputting the first ping (e.g., the result of operation 340 is YES), the electronic device (201) may perform operation 370. If the electronic device (201) does not receive a response signal from the external device (202) after outputting the first ping (e.g., the result of operation 340 is NO), the electronic device (201) may perform operation 360. If the electronic device (201) receives an XID (extended identification data packet) packet indicating MPP supportability from the external device (202) after outputting the first ping, the electronic device (201) may perform operation 370. According to one embodiment, even if each of the electronic device (201) and the external device (202) supports MPP charging, if the alignment state of the magnets for aligning the electronic device (201) and the external device (202) is not correct, the external device (202) may not output a response signal to the first ping. If the electronic device (201) does not receive a response signal (e.g., XID packet, SSP) from the external device (202) after outputting the first ping, the electronic device (201) may perform operation 360. For example, the electronic device (201) may perform a second ping output operation in order to receive a response to the second ping.

[0094] In operation 350, the electronic device (201) according to one embodiment may perform EPP charging or BPP charging. The electronic device (201) according to one embodiment may perform EPP charging or BPP charging if the value N, which is the number of times MPP charging has been attempted repeatedly, is greater than or equal to a specified first threshold. For example, if the value N, which is the cumulative number of times MPP charging has been attempted, is greater than or equal to the specified first threshold, the electronic device (201) may perform EPP charging or BPP charging without attempting MPP charging any more.

[0095] According to one embodiment, the electronic device (201) may perform a second negotiation communication for EPP charging (e.g., second wireless charging) with the external device (202) if the value N, which is the number of times the MPP charging has been repeatedly attempted, is greater than or equal to a first threshold value. The electronic device (201) may perform a third communication for BPP charging (e.g., third wireless charging) with the external device (202) if the value N, which is the number of times the MPP charging has been repeatedly attempted, is greater than or equal to the first threshold value and the external device (202) does not support EPP charging. Here, the third communication may mean a one-way communication in which the external device (202) requests a specific power or a specific voltage from the electronic device (201).

[0096] The term “EPP charging” used in various embodiments of the present disclosure may mean high-speed wireless charging in which a power supply device (201) (e.g., the power supply device (201) of FIG. 2) wirelessly transmits power of up to about 15 W to a power receiving device (202) (e.g., the power receiving device (202) of FIG. 2), and may be used interchangeably with terms such as “second wireless charging” and “EPP mode.”

[0097] The term "BPP charging" used in various embodiments of the present disclosure may mean low-speed wireless charging in which a power supply device (201) (e.g., the power supply device (201) of FIG. 2) wirelessly transfers power of up to about 5 W to a power receiving device (202) (e.g., the power receiving device (202) of FIG. 2), and may be used interchangeably with terms such as "third wireless charging" and "BPP mode".

[0098] In operation 350, the electronic device (201) according to one embodiment can check whether the external device (202) supports EPP charging. If the external device (202) supports EPP charging, the electronic device (201) can perform EPP charging by wirelessly transmitting power of up to about 15 W to the external device (202).

[0099] In EPP charging, the electronic device (201) can exchange data (e.g., packets) corresponding to the identification and configuration steps with the external device (202). For example, the packets exchanged between the electronic device (201) and the external device (202) may include an identification packet, a configuration packet, or a foreign object detection (FOD) status packet. The electronic device (201) and the external device (202) may start a power transfer step after the identification step is completed. In the power transfer step, the external device (202) may measure the reception power received from the external device (202) and transmit data regarding the measured reception power to the electronic device (201), thereby adjusting the level of the transmission power. The external device (202) may transmit a control error packet (CEP) or a FOD status packet to the electronic device (201). The electronic device (201) may stop the wireless power transfer or adjust the transmission power based on receiving the CEP.

[0100] In operation 350, the electronic device (201) according to one embodiment may perform BPP charging, wirelessly transmitting power of up to about 5 W to the external device (202) if the external device (202) does not support EPP charging. Unlike EPP charging, BPP charging may be charging that does not perform negotiation, calibration, or renegotiation steps between the electronic device (201) and the external device (202).

[0101] In operation 360, the electronic device (201) according to one embodiment may determine whether a response signal is received from the external device (202) after outputting the second ping. If the electronic device (201) receives a response signal from the external device (202) after outputting the second ping (e.g., the result of operation 360 is YES), the electronic device (201) may perform operation 310 again. If the electronic device (201) does not receive a response signal from the external device (202) after outputting the second ping (e.g., the result of operation 360 is NO), the electronic device (201) may perform operation 380.

[0102] According to one embodiment, even if each of the electronic device (201) and the external device (202) supports MPP charging, if the alignment state of the magnets for aligning the electronic device (201) and the external device (202) is not correct, the external device (202) may not be able to output a response signal to the second ping.

[0103] According to one embodiment, when the number of times the electronic device (201) has attempted to repeat MPP charging, N, is less than a specified first threshold value and a response from the external device (202) to the second ping is received, the electronic device (201) branches to operation 310 and performs operation 310 again.

[0104] According to one embodiment, if the electronic device (201) does not receive an XID packet from the external device (202) after outputting the second ping, the electronic device (201) may perform operation 380 by assuming that the external device (202) is not present within a specified distance from the electronic device (201).

[0105] According to one embodiment, when the electronic device (201) receives a response signal from the external device (202) after outputting the second ping (e.g., the result of operation 360 is yes), the electronic device (201) may transmit a misalignment signal indicating misalignment of the external device (202) to the external device (202). According to one embodiment, the electronic device (201) may transmit the misalignment signal through in-band communication (e.g., frequency shift keying (FSK) or amplitude shift keying (ASK)) or out-band communication (e.g., Bluetooth communication). By receiving the misalignment signal from the electronic device (201), the external device (202) may confirm that the alignment state of the electronic device (201) and the external device (202) using a magnet is not accurate. As described below with reference to FIG. 10, the external device (202) can output a designated notification based on a misalignment signal received from the electronic device (201). For example, the designated notification may be in the form of the external device (202) displaying a message (e.g., 1001 of FIG. 10) through the display module of the external device (202) (the display module (160) of FIG. 10), but the present invention is not limited thereto.

[0106] In operation 370, the electronic device (201) according to one embodiment may perform MPP charging. The electronic device (201) according to one embodiment may change the operating frequency from about 128 KHz to about 360 KHz and perform negotiation, correction, or renegotiation steps for MPP charging.

[0107] According to one embodiment, the electronic device (201) may perform a first negotiation communication for MPP charging (e.g., first wireless charging) with the external device (202) when the value N, which is the number of times the MPP charging has been repeatedly attempted, is less than a first threshold value and a response from the external device (202) to the first ping is received. When the first negotiation communication with the external device (202) is completed, the electronic device (201) may wirelessly transmit power of about 15 W or more.

[0108] In operation 380, the electronic device (201) according to one embodiment may transition to a standby state if no response from the external device (202) to the first ping is received and no response from the external device (202) to the second ping is received. The standby state may be a state in which the electronic device (201) outputs an analog ping to detect the external device (202).

[0109] According to one embodiment, the electronic device (201) may perform an operation of checking whether a specific object (e.g., the power receiving device (202) of FIG. 2) is located around the coil by outputting an analog ping before outputting the digital ping according to operation 310. If the electronic device (201) detects the specific object by outputting the analog ping, the electronic device (201) may perform operation 310 again.

[0110] Fig. 4 is an example of a scenario in which a power supply device (201) according to one embodiment performs MPP charging. In Fig. 4, the horizontal axis may represent time, and the vertical axis may represent the intensity of power.

[0111] Hereinafter, with reference to FIGS. 3 and 4, an exemplary scenario in which a power supply device (201) according to one embodiment performs MPP charging is described.

[0112] At point 401, an electronic device (201) according to an embodiment (e.g., a power supply device (201) of FIG. 2) may output a digital ping to wake up an external device (202) (e.g., a power reception device (202) of FIG. 2). The digital ping may include a first ping (e.g., a High K ping) and a second ping (e.g., a Low K ping). The electronic device (201) may output the first ping among the first ping and the second ping, and point 401 represents a state in which the electronic device (201) outputs the first ping.

[0113] At point 402, the electronic device (201) according to one embodiment may output a second ping if no response signal from the external device (202) is received for a specified time after outputting the first ping.

[0114] The operation of the electronic device (201) according to the time points 401 and 402 illustrated in FIG. 4 may be at least partially similar to or substantially identical to the operation 310 described with reference to FIG. 3.

[0115] At point 403, the electronic device (201) according to one embodiment may output the first ping again if no response signal from the external device (202) is received for a specified time after outputting the second ping.

[0116] At point 404, the electronic device (201) according to one embodiment may receive a response signal from the external device (202) after outputting the first ping. The response signal may include an extended identification data packet (XID) packet indicating that MPP support is possible. For example, if the electronic device (201) receives an XID as a response signal from the external device (202) to the digital ping, the electronic device (201) may determine that the external device (202) is a device that supports MPP charging.

[0117] An electronic device (201) according to one embodiment may perform a first negotiation communication for MPP charging (e.g., first wireless charging) in response to receiving a response signal from an external device (202).

[0118] According to one embodiment, the electronic device (201) can perform MPP charging when the first negotiation communication is completed. For example, the electronic device (201) can perform negotiation, correction, and renegotiation communication for MPP charging with the external device (201), and perform MPP charging based on the negotiation result. Here, the electronic device (201) performing MPP charging can mean an operation in which the electronic device (201) wirelessly transmits power of about 15 W or more to the external device (201).

[0119] In one embodiment, the operation of the electronic device (201) transmitting power at point 404 may be an operation that is sequentially connected from the operation of outputting a first ping (e.g., High K ping) at point 403.

[0120] In one embodiment, negotiation, correction, or renegotiation steps for MPP charging may be performed after point 404.

[0121] The operation of the electronic device (201) according to point 404 illustrated in FIG. 4 may be at least partially similar to or substantially identical to operation 370 described with reference to FIG. 3.

[0122] Fig. 5 is an example of a scenario in which a power supply device (201) according to one embodiment performs BPP charging (or EPP charging). In Fig. 5, the horizontal axis may represent time, and the vertical axis may represent the intensity of power.

[0123] Hereinafter, with reference to FIGS. 3 and 5, an exemplary scenario in which a power supply device (201) according to one embodiment performs BPP charging (or EPP charging) will be described.

[0124] At time points 501, 504, 507, and 510, an electronic device (201) according to one embodiment (e.g., a power supply device (201) of FIG. 2 ) may output a digital ping to wake up an external device (202) (e.g., a power reception device (202) of FIG. 2 ). The digital ping may include a first ping and a second ping. The electronic device (201) may output the first ping among the first ping and the second ping, and time points 501, 504, 507, and 510 represent a state in which the electronic device (201) outputs the first ping.

[0125] At time points 502, 505, 508, and 511, the electronic device (201) according to one embodiment may output a second ping if no response signal from the external device (202) is received for a specified time after outputting the first ping.

[0126] The operation of the electronic device (201) according to points 502, 505, 508, and 511 illustrated in FIG. 5 may be at least partially similar to or substantially identical to operation 360 described with reference to FIG. 3.

[0127] At time points 503, 506, 509, and 512, the electronic device (201) according to one embodiment may receive a response signal from the external device (202) after outputting the second ping. The response signal may include an extended identification data packet (XID) packet indicating MPP support. For example, if the electronic device (201) receives an XID as a response signal from the external device (202) to the digital ping, the electronic device (201) may determine that the external device (202) is a device that supports MPP charging.

[0128] According to one embodiment, when the electronic device (201) receives a response signal to the second ping from the external device (202), the electronic device (201) may return to the ping stage for MPP charging and output the first ping and the second ping. For example, based on receiving the response signal to the second ping from the external device (202) at time 503, the electronic device (201) may output the first ping again at time 504, and if no response signal to the first ping is received from the external device (202), the electronic device (201) may output the second ping again at time 505. For example, based on receiving the response signal to the second ping from the external device (202) at time 506, the electronic device (201) may output the first ping again at time 507, and if no response signal to the first ping is received from the external device (202), the electronic device (201) may output the second ping again at time 508. For example, the electronic device (201) may output the first ping again at time 510 based on receiving a response signal to the second ping from the external device (202) at time 509, and may output the second ping at time 511 if no response signal to the first ping is received from the external device (202).

[0129] An electronic device (201) according to one embodiment may receive a response signal for a second ping, increase the value N, which is the number of ping outputs, by 1, and output a first ping.

[0130] According to one embodiment, when a response signal for the second ping is received from the external device (202), the electronic device (201) determines that the external device (202) is in a misaligned state and returns to the ping stage to output the first ping. The electronic device (201) according to one embodiment may be configured not to infinitely repeat the operation of returning to the ping stage to output the first ping based on the result of determining that the external device (202) is in a misaligned state, and may be configured to perform the operation of returning to the ping stage only within a specified number of times. For example, the electronic device (201) may check whether the value N, which is the cumulative output number of the first ping and the second ping, is greater than or equal to a threshold value, as described in operation 330 of FIG. 3. In the illustrated example, at point 512 when the electronic device (201) receives a response signal for the second ping from the external device (202) for the fourth time, it is shown that the first ping and the second ping are no longer output again for MPP charging, and EPP charging or BPP charging is performed, but the present invention is not limited thereto.

[0131] At point 512, the electronic device (201) according to one embodiment may perform EPP charging or BPP charging if the value N, which is the number of times MPP charging has been repeatedly attempted, is greater than or equal to a specified first threshold. The electronic device (201) according to one embodiment may determine whether the external device (202) supports EPP charging. If the external device (202) supports EPP charging, the electronic device (201) may perform EPP charging to wirelessly transfer power of up to about 15 W to the external device (202). If the external device (202) does not support EPP charging, the electronic device (201) according to one embodiment may perform BPP charging to wirelessly transfer power of up to about 5 W to the external device (202). Unlike EPP charging, BPP charging may be charging that does not perform negotiation, calibration, or renegotiation steps between the electronic device (201) and the external device (202).

[0132] The operation of the electronic device (201) according to point 512 illustrated in FIG. 5 may be at least partially similar to or substantially identical to operation 350 described with reference to FIG. 3.

[0133] According to one embodiment, the operation of the electronic device (201) transmitting power according to EPP or BPP at time point 512 may be an operation that is sequentially connected from the operation of outputting a second ping (e.g., Low K ping) at time point 511.

[0134] FIG. 6 is a flowchart illustrating an operation of a power supply device (201) according to one embodiment of the present invention to determine whether to charge MPP based on a K value indicating the alignment state of a coil.

[0135] At least some of the operations illustrated in FIG. 6 may be omitted. At least some of the operations mentioned with reference to other drawings in this disclosure may be additionally inserted before or after at least some of the operations illustrated in FIG. 6.

[0136] According to one embodiment, at least some of the operations illustrated in FIG. 6 may be performed sequentially.

[0137] According to one embodiment, at least some of the operations illustrated in FIG. 6 can be performed in parallel (simultaneously).

[0138] According to one embodiment, at least some of the operations illustrated in FIG. 6 may be performed with their order changed.

[0139] Hereinafter, with reference to FIG. 6, an operation of a power supply device (201) according to one embodiment to determine whether to charge MPP based on a K value indicating the alignment state of a coil will be described.

[0140] Operation 610 illustrated in FIG. 6 may be an operation performed after operations 330 and 340 described with reference to FIG. 3. For example, the electronic device (201) (e.g., power supply device (201)) according to the embodiment of FIG. 6, unlike the embodiment of FIG. 3, may further perform operations 610 to 640 as operations for determining whether to perform MPP charging based on a K value indicating the alignment state of the coil.

[0141] In operation 610, the electronic device (201) according to one embodiment (e.g., the power supply device (201) of FIG. 2) may determine a K value indicating an alignment state of the electronic device (201) and the external device (202) if a response signal is received from the external device (202) after outputting the first ping (e.g., the result of operation 340 is yes).

[0142] In various embodiments of the present disclosure, the “K value” refers to a value indicating the degree to which a coil of an electronic device (201) (e.g., a first coil) and a coil of an external device (202) (e.g., a second coil) are coupled, and for example, the K value may increase as the degree to which a coil of an electronic device (201) (e.g., a first coil) and a coil of an external device (202) (e.g., a second coil) are coupled increases. A relatively large K value may indicate that a coil of an electronic device (201) (e.g., a first coil) and a coil of an external device (202) (e.g., a second coil) are aligned at an optimal position. A relatively small K value may indicate that a coil of an electronic device (201) (e.g., a first coil) and a coil of an external device (202) (e.g., a second coil) are aligned so as to deviate from the optimal position.

[0143] According to one embodiment, the electronic device (201) may determine a K value based on an output voltage output from an inverter of the electronic device (201) and data received from an external device (202). For example, the electronic device (201) may receive a designated packet from the external device (202), and the designated packet may include a rectified voltage of the external device (202). According to one embodiment, the designated packet may be included in a signal strength packet (SSP) signal. For example, the SSP signal may include rectified voltage or current-related data. According to one embodiment, the electronic device (201) may calculate a gain in a digital ping stage based on the output voltage of the inverter and the rectified voltage of the external device (202), and may determine a K value representing a degree of coupling between a coil of the electronic device (201) (e.g., a first coil) and a coil of the external device (202) (e.g., a second coil) based on the calculated gain.

[0144] According to one embodiment, the electronic device (201) can transmit the determined K value to the external device (202). In this case, the external device (202) can determine the K value indicating the degree to which the coil (e.g., the first coil) of the electronic device (201) and the coil (e.g., the second coil) of the external device (202) are coupled based on the K value received from the electronic device (201).

[0145] In another embodiment, if the electronic device (201) receives a response signal from the external device (202) after outputting the first ping (e.g., the result of operation 340 is yes), the electronic device (201) may transmit a designated packet containing the output voltage of the inverter to the external device (202). In this case, the external device (202) may calculate the K value independently of the electronic device (201).

[0146] In operation 620, the electronic device (201) according to one embodiment may determine whether the determined K value is greater than or equal to a specified second threshold value. If the determined K value is greater than or equal to the specified second threshold value (e.g., the result of operation 620 is YES), the electronic device (201) according to one embodiment may perform operation 630. If the determined K value is less than the specified second threshold value (e.g., the result of operation 620 is NO), the electronic device (201) according to one embodiment may perform operation 640.

[0147] In operation 630, the electronic device (201) according to one embodiment may perform MPP charging when the K value is greater than or equal to a specified second threshold value. The electronic device (201) according to one embodiment may change the operating frequency from about 128 KHz to about 360 KHz and perform negotiation, correction, or renegotiation steps for MPP charging.

[0148] According to one embodiment, the electronic device (201) may perform a first negotiation communication for MPP charging (e.g., first wireless charging) with the external device (202) when a value N, which is the number of times MPP charging has been repeatedly attempted, is less than a first threshold value, a response from the external device (202) to the first ping is received, and a value K, which indicates the degree to which a coil (e.g., a first coil) of the electronic device (201) and a coil (e.g., a second coil) of the external device (202) are coupled, is greater than or equal to a second threshold value. When the first negotiation communication with the external device (202) is completed, the electronic device (201) may wirelessly transmit power of about 15 W or more.

[0149] Action 630 may be at least partially similar to action 370 described with reference to FIG. 3.

[0150] In operation 640, the electronic device (201) according to one embodiment may sequentially output the first ping and the second ping again as a step of re-outputting the digital ping when the K value is less than a specified second threshold value. For example, the electronic device (201) may determine the degree to which the coil of the electronic device (201) (e.g., the first coil) and the coil of the external device (202) (e.g., the second coil) are coupled by determining the K value even if a response from the external device (202) to the first ping is received. If the electronic device (201) receives a response from the external device (202) to the first ping and the K value is less than the specified second threshold value, the electronic device (201) may determine that the alignment state of the electronic device (201) and the external device (202) is not an optimal condition, and thus the electronic device (201) may re-output the digital ping. Additionally, the electronic device (201) may be set to perform EPP charging or BPP charging when a response from the external device (202) to the first ping is received and a state in which the K value is less than a specified second threshold value is repeated a specified number of times (e.g., the N value in FIG. 3).

[0151] Action 640 may be at least partially similar to action 310 described with reference to FIG. 3.

[0152] Fig. 7 is an example of a scenario in which a power supply device (201) according to one embodiment performs MPP charging based on a K value greater than or equal to a threshold value. In Fig. 7, the horizontal axis may represent time, and the vertical axis may represent the intensity of power.

[0153] Hereinafter, with reference to FIGS. 6 and 7, an exemplary scenario in which a power supply device (201) according to one embodiment performs MPP charging based on a K value greater than or equal to a threshold value is described.

[0154] At point 701, an electronic device (201) according to an embodiment may output a first ping as a digital ping. An electronic device (201) according to an embodiment (e.g., a power supply device (201) of FIG. 2) may output a digital ping to wake up an external device (202) (e.g., a power reception device (202) of FIG. 2). The digital ping may include a first ping and a second ping. The electronic device (201) may output the first ping among the first ping and the second ping, and point 701 represents a state in which the electronic device (201) outputs the first ping.

[0155] At point 702, the electronic device (201) according to one embodiment may receive a response signal from the external device (202) after outputting the first ping. The response signal may include an extended identification data packet (XID) packet indicating that MPP support is possible. For example, if the electronic device (201) receives an XID as a response signal from the external device (202) to the digital ping, the electronic device (201) may determine that the external device (202) is a device that supports MPP charging.

[0156] At point 703, when the electronic device (201) according to one embodiment receives a response signal from the external device (202), the electronic device (201) can determine a K value indicating an alignment state of the electronic device (201) and the external device (202).

[0157] According to one embodiment, the electronic device (201) may determine a K value based on an output voltage output from an inverter of the electronic device (201) and data received from an external device (202). For example, the electronic device (201) may receive a specified packet from the external device (202), and the specified packet may include a rectified voltage of the external device (202). The electronic device (201) may calculate a gain in a digital ping stage based on the output voltage of the inverter and the rectified voltage of the external device (202), and may determine a K value indicating a degree of coupling between a coil of the electronic device (201) (e.g., a first coil) and a coil of the external device (202) (e.g., a second coil) based on the calculated gain.

[0158] According to one embodiment, the electronic device (201) can transmit the determined K value to the external device (202). In this case, the external device (202) can determine the K value indicating the degree to which the coil (e.g., the first coil) of the electronic device (201) and the coil (e.g., the second coil) of the external device (202) are coupled based on the K value received from the electronic device (201).

[0159] In another embodiment, if the electronic device (201) receives a response signal from the external device (202) after outputting the first ping (e.g., the result of operation 340 is yes), the electronic device (201) may transmit a designated packet containing the output voltage of the inverter to the external device (202). In this case, the external device (202) may calculate the K value independently of the electronic device (201).

[0160] At point 704, the electronic device (201) according to one embodiment may perform MPP charging if the determined K value is greater than or equal to a designated second threshold value. The electronic device (201) according to one embodiment may change the operating frequency from about 128 KHz to about 360 KHz and perform negotiation, correction, or renegotiation steps for MPP charging.

[0161] In one embodiment, the electronic device (201) may perform a first negotiation communication for MPP charging (e.g., first wireless charging) with an external device (202). Upon completion of the first negotiation communication with the external device (202), the electronic device (201) may wirelessly transmit power of about 15 W or more.

[0162] The operation of the electronic device (201) according to one embodiment of the invention at point 704 may be at least partially similar to operation 630 described with reference to FIG. 6.

[0163] Fig. 8 is an example of a scenario in which a power supply device (201) according to one embodiment performs BPP charging (or EPP charging) based on a K value below a threshold value. In Fig. 8, the horizontal axis may represent time, and the vertical axis may represent the intensity of power.

[0164] Hereinafter, with reference to FIGS. 6 and 8, an exemplary scenario in which a power supply device (201) according to one embodiment performs BPP charging (or EPP charging) based on a K value below a threshold value is described.

[0165] At time points 811, 821, 831, and 841, the electronic device (201) according to an embodiment may output a first ping as a digital ping. The electronic device (201) according to an embodiment (e.g., the power supply device (201) of FIG. 2) may output a digital ping to wake up an external device (202) (e.g., the power reception device (202) of FIG. 2). The electronic device (201) may start in a BPP mode of about 128 KHz when starting a wireless charging mode. The digital ping may include a first ping and a second ping. The electronic device (201) may output the first ping among the first ping and the second ping, and time points 811, 821, 831, and 841 represent a state in which the electronic device (201) outputs the first ping.

[0166] At time points 812, 822, 832, and 842, the electronic device (201) according to one embodiment may receive a response signal from the external device (202) after outputting the first ping. The response signal may include an extended identification data packet (XID) packet indicating MPP support. For example, if the electronic device (201) receives an XID as a response signal from the external device (202) to the digital ping, the electronic device (201) may determine that the external device (202) is a device that supports MPP charging.

[0167] At time points 813, 823, 833, and 843, the electronic device (201) according to one embodiment may determine a K value indicating an alignment state of the electronic device (201) and the external device (202). The electronic device (201) according to one embodiment may determine the K value based on an output voltage output from an inverter of the electronic device (201) and data received from the external device (202). For example, the electronic device (201) may receive a specified packet from the external device (202), and the specified packet may include a rectified voltage of the external device (202). The electronic device (201) may calculate a gain in a digital ping step based on the output voltage of the inverter and the rectified voltage of the external device (202), and may determine a K value indicating a degree of coupling between a coil of the electronic device (201) (e.g., a first coil) and a coil of the external device (202) based on the calculated gain.

[0168] At time points 814, 824, and 834, the electronic device (201) according to one embodiment may transmit the determined K value to the external device (202). In this case, the external device (202) may determine the K value indicating the degree to which the coil (e.g., the first coil) of the electronic device (201) and the coil (e.g., the second coil) of the external device (202) are coupled based on the K value received from the electronic device (201).

[0169] In another embodiment, the external device (202) can calculate the K value independently from the electronic device (201). For example, if the electronic device (201) receives a response signal from the external device (202) after outputting the first ping (e.g., the result of operation 340 of FIG. 3), the electronic device (201) can transmit a designated packet including the output voltage of the inverter to the external device (202). The external device (202) can calculate the K value independently from the electronic device (201) based on analyzing the output voltage of the inverter received from the electronic device (201).

[0170] According to one embodiment, the electronic device (201) may output a digital ping again when the determined K value is less than a specified second threshold. According to one embodiment, when the K value is less than the specified second threshold, the electronic device (201) may determine that the external device (202) is in a misaligned state and return to the ping stage to output a first ping. For example, based on confirming that the K value is less than the specified second threshold at time point 813, the electronic device (201) may transmit the K value to the external device (202) at time point 814 and output the first ping again at time point 821. For example, based on confirming that the K value is less than the specified second threshold at time point 823, the electronic device (201) may transmit the K value to the external device (202) at time point 824 and output the first ping again at time point 831. For example, the electronic device (201) may transmit the K value to the external device (202) at time point 834 and output the first ping again at time point 841 based on determining that the K value is less than a specified second threshold at time point 833.

[0171] At time points 821, 831, and 841, the electronic device (201) according to one embodiment may output the digital ping again if the K value determined at time points 813, 823, or 833 is less than a designated second threshold. For example, the electronic device (201) may output the first ping and the second ping again sequentially. For example, even if a response from the external device (202) to the first ping is received (e.g., at time points 812, 822, and 833), the electronic device (201) may not immediately start MPP charging, but may determine the degree to which a coil of the electronic device (201) (e.g., the first coil) and a coil of the external device (202) (e.g., the second coil) are coupled by determining the K value. If the electronic device (201) receives a response from the external device (202) to the first ping and the K value is less than the specified second threshold value, the electronic device (201) may consider that the alignment state of the electronic device (201) and the external device (202) is not in an optimal condition, and may output a digital ping again, such as at time points 821, 831, and 841.

[0172] According to one embodiment, the electronic device (201) may be configured not to infinitely repeat the operation of returning to the ping stage and outputting the first ping based on confirming that the K value is less than the specified second threshold value, and may be configured to perform the operation of returning to the ping stage only within a specified number of times. In the illustrated example, after the electronic device (201) confirms for the fourth time that the K value is less than the specified second threshold value at time 843, the electronic device (201) no longer outputs the first ping and the second ping again for MPP charging, and performs EPP charging or BPP charging at time 844, but the present invention is not limited thereto.

[0173] At time 844, the electronic device (201) according to one embodiment may perform EPP charging or BPP charging after receiving a response from the external device (202) to the first ping. The electronic device (201) according to one embodiment may determine whether the external device (202) supports EPP charging. If the external device (202) supports EPP charging, the electronic device (201) may perform EPP charging to wirelessly transfer power of up to about 15 W to the external device (202). If the external device (202) does not support EPP charging, the electronic device (201) according to one embodiment may perform BPP charging to wirelessly transfer power of up to about 5 W to the external device (202). Unlike EPP charging, BPP charging may be charging that does not perform negotiation, calibration, or renegotiation steps between the electronic device (201) and the external device (202).

[0174] The operation of the electronic device (201) according to one embodiment of the invention at point 844 may be at least partially similar to operation 350 described with reference to FIG. 3.

[0175] Fig. 9 is a graph exemplarily showing the correlation between the gain and the K value of a wireless charging system according to one embodiment.

[0176] Referring to FIG. 9, an electronic device (201) according to one embodiment (e.g., a power supply device (201) of FIG. 2) may determine a K value based on an output voltage output from an inverter of the electronic device (201) and data received from an external device (202) (e.g., a power reception device (202) of FIG. 2). For example, the electronic device (201) may receive a specified packet from the external device (202), and the specified packet may include a rectified voltage of the external device (202). The electronic device (201) may calculate a gain in a digital ping stage based on the output voltage of the inverter and the rectified voltage of the external device (202), and may determine a K value indicating a degree of coupling between a coil of the electronic device (201) (e.g., a first coil) and a coil of the external device (202) (e.g., a second coil) based on the calculated gain.

[0177] According to another embodiment, if the electronic device (201) receives a response signal from the external device (202) after outputting the first ping (e.g., the result of operation 340 of FIG. 3), the electronic device (201) may transmit a designated packet including the output voltage of the inverter to the external device (202). In this case, the external device (202) may calculate the K value independently of the electronic device (201).

[0178] The K value, which indicates the degree to which the coil (e.g., the first coil) of the electronic device (201) and the coil (e.g., the second coil) of the external device (202) are coupled, and the gain in the digital ping stage may have a correlation such as the curve (910) illustrated in FIG. 9. For example, in FIG. 9, the horizontal axis may represent the K value, and the vertical axis may represent the gain in the digital ping stage. As illustrated in FIG. 9, as the K value increases, the gain in the digital ping stage tends to increase, and therefore, the electronic device (201) or the external device (202) can estimate the gain from the identified K value. In addition, the electronic device (201) or the external device (202) can determine whether the coil (e.g., the first coil) of the electronic device (201) and the coil (e.g., the second coil) of the external device (202) are aligned at an optimal position from the identified K value.

[0179] According to one embodiment, the electronic device (201) and / or the external device (202) may determine that a coil of the electronic device (201) (e.g., the first coil) and a coil of the external device (202) (e.g., the second coil) are aligned at an optimal position when the K value is greater than or equal to about 0.6 (e.g., from about 0.6 to about 0.85). For example, according to the illustrated graph, when the K value is greater than or equal to about 0.6, the gain may be greater than or equal to about 0.75, and the electronic device (201) and / or the external device (202) may determine that a coil of the electronic device (201) (e.g., the first coil) and a coil of the external device (202) (e.g., the second coil) are aligned at an optimal position when the K value is greater than or equal to about 0.6 and the gain is greater than or equal to about 0.75.

[0180] FIG. 10 is an example of a notification output by a power receiving device (202) according to one embodiment.

[0181] Referring to FIG. 10, according to one embodiment, when the electronic device (201) receives a response signal from the external device (202) after outputting the second ping (e.g., the result of operation 360 of FIG. 3), the electronic device (201) may transmit a misalignment signal indicating misalignment of the external device (202) to the external device (202). By receiving the misalignment signal from the electronic device (201), the external device (202) may confirm that the alignment state of the electronic device (201) and the external device (202) using a magnet is not accurate.

[0182] According to one embodiment, the external device (202) may output a designated notification based on a misalignment signal received from the electronic device (201). For example, the designated notification may be in the form of the external device (202) displaying a message through a display module of the external device (202). In response to the misalignment signal received from the electronic device (201), the external device (202) may display a message to inform the user that the alignment between the electronic device (201) and the external device (202) using magnets is not correct, such as "It is not properly aligned with the charger (e.g., travel adapter). Please check the magnetic cover."

[0183] In some embodiments, the external device (202) may provide a notification in the form of sound or voice that the alignment of the electronic device (201) and the external device (202) is not accurate due to an error in the magnetic cover.

[0184] FIG. 11 is a flowchart illustrating the operation of a power receiving device (202) according to one embodiment.

[0185] The operations illustrated in FIG. 11 may be performed by instructions stored in a memory (e.g., memory (288) of FIG. 2). For example, the instructions, when executed by a processor (e.g., processor (299) of FIG. 2), may cause an electronic device (e.g., power receiving device (202) of FIG. 2) to perform the operations illustrated in FIG. 11.

[0186] At least some of the operations illustrated in FIG. 11 may be omitted. At least some of the operations mentioned with reference to other drawings in this disclosure may be additionally inserted before or after at least some of the operations illustrated in FIG. 11.

[0187] According to one embodiment, at least some of the operations illustrated in FIG. 11 may be performed sequentially.

[0188] According to one embodiment, at least some of the operations illustrated in FIG. 11 may be performed in parallel (simultaneously).

[0189] According to one embodiment, at least some of the operations illustrated in FIG. 11 may be performed with their order changed.

[0190] Hereinafter, the operation of a power receiving device (202) according to one embodiment will be described with reference to FIG. 11.

[0191] In operation 1111, an electronic device (202) according to one embodiment (e.g., a power receiving device (202) of FIG. 2) may receive a ping from an external device (201) (e.g., a power supply device (201) of FIG. 2) when starting wireless charging. The ping received from the external device (201) may be, for example, a first ping or a second ping, as a digital ping.

[0192] In operation 1113, the electronic device (202) according to one embodiment, upon receiving a digital ping from the external device (201), may determine whether the processor (299) is in a wake-up state. For example, if the electronic device (202) is powered off, the processor (299) may not be in a wake-up state. When the electronic device (202) receives a digital ping from the external device (201), the wireless charging circuit (e.g., the wireless charging circuit (220) of FIG. 2) is woken up, and the woken up wireless charging circuit may determine whether the processor (299) is in a wake-up state.

[0193] According to one embodiment, the electronic device (202) may perform operation 1115 if the processor (299) is in a wake-up state (e.g., the result of operation 1113 is YES). According to one embodiment, the electronic device (202) may perform operation 1133 if the processor (299) is not in a wake-up state (e.g., the result of operation 1113 is NO).

[0194] In operation 1115, the electronic device (202) according to one embodiment may determine whether a cover accessory including a magnet is coupled to the electronic device (202). The cover accessory may include at least one magnet facing the rear surface of the electronic device (202), considering that the electronic device (202) supports MPP charging. If the magnet of the cover accessory is not a genuine product mass-produced by the manufacturer of the electronic device (202), there may be a design error in which the coil of the electronic device (202) is not precisely aligned with the coil of the external device (201). The design error of the magnet of the cover accessory may cause a charging error that stops MPP charging between the electronic device (202) and the external device (201).

[0195] According to one embodiment, the electronic device (202) may perform operation 1117 if the magnetic cover of the cover accessory is recognized (e.g., the result of operation 1115 is YES). According to one embodiment, the electronic device (202) may perform operation 1133 if the magnetic cover of the cover accessory is not recognized (e.g., the result of operation 1115 is NO).

[0196] In operation 1117, the electronic device (202) according to one embodiment may count a value N, which is the cumulative number of times a digital ping from the external device (201) has been received. The electronic device (202) may determine the value N by directly counting the number of times the digital ping has been received. In another embodiment, the electronic device (202) may also recognize the number of times the external device (201) has accumulated and output a digital ping by receiving the value N from the external device (201).

[0197] In operation 1119, the electronic device (202) according to one embodiment may determine whether the value N is less than a specified first threshold. If the value N is less than the specified first threshold (e.g., the result of operation 1119 is YES), the electronic device (202) may perform operation 1121. If the value N is greater than or equal to the specified first threshold (e.g., the result of operation 1119 is NO), the electronic device (202) may perform operation 1133.

[0198] In operation 1121, the electronic device (202) according to one embodiment may transmit a signal requesting MPP charging to the external device (201) if the N value is less than a specified first threshold. For example, the electronic device (202) may transmit an XID (extended identification data packet) packet indicating MPP support as a response signal to a digital ping of the external device (201).

[0199] In operation 1123, the electronic device (202) according to one embodiment may determine whether the external device (201) supports MPP charging. If the external device (201) supports MPP charging (e.g., the result of operation 1123 is YES), the electronic device (202) may perform operation 1125. If the external device (201) does not support MPP charging (e.g., the result of operation 112 is NO), the electronic device (202) may perform operation 1133.

[0200] In operation 1125, the electronic device (202) according to one embodiment, if the external device (201) supports MPP charging, may perform a first negotiation communication for MPP charging (e.g., first wireless charging) with the external device (201) and request a K value from the external device (201). The electronic device (202) may confirm the K value by receiving the K value determined by the external device (201). In another embodiment, the electronic device (202) may calculate the K value independently from the external device (201). In this case, the electronic device (202) may request the output voltage of the inverter from the external device (201) and may calculate a gain in the digital ping stage using the output voltage of the inverter and the rectified voltage received by the electronic device (202). The electronic device (202) may calculate the K value based on the calculated gain.

[0201] In operation 1127, the electronic device (202) according to one embodiment may determine whether the K value is greater than or equal to a specified second threshold. If the K value is greater than or equal to the specified second threshold (e.g., the result of operation 1127 is YES), the electronic device (202) may perform operation 1131. If the K value is less than the specified second threshold (e.g., the result of operation 1127 is NO), the electronic device (202) may perform operation 1129.

[0202] In operation 1129, the electronic device (202) according to one embodiment may request the external device (201) to revert to the ping operation. For example, the electronic device (202) may transmit an error signal to the external device (201) requesting the external device (201) to transmit a digital ping again. According to one embodiment, the external device (201) may perform operation 1111 again as a ping step in response to the request (e.g., the error signal) from the electronic device (202).

[0203] In operation 1131, an electronic device (202) according to one embodiment may request MPP charging from an external device (201). In response to the request of the electronic device (202), the external device (201) may change the operating frequency from about 128 KHz to about 360 KHz and perform negotiation, correction, or renegotiation steps for MPP charging.

[0204] In operation 1133, the electronic device (202) according to one embodiment may request BPP charging from the external device (201) and start BPP charging. For example, the electronic device (202) may request BPP charging from the external device (201) when the processor (299) is not in a wake-up state. For example, the electronic device (202) may request BPP charging from the external device (201) when the magnetic cover of the cover accessory is not recognized. For example, the electronic device (202) may request BPP charging from the external device (201) when the accumulated number of times a digital ping has been received, N, is greater than or equal to a specified first threshold. For example, the electronic device (202) may request BPP charging or EPP charging from the external device (201) when the external device (201) does not support MPP.

[0205] According to one embodiment, when the electronic device (202) is powered off, the processor (299) may be in an inactive state. For example, when the electronic device (202) is placed on a wireless charging pad (e.g., external device (201)) while the electronic device (202) is powered off, the processor (299) of the electronic device (202) may be in an inactive state. In this case, the electronic device (202) may perform BPP charging based on the control of the activated control circuit (e.g., the control circuit (270) of FIG. 2)) of the wireless charging circuit (e.g., the wireless charging circuit (220) of FIG. 2) when the control circuit is activated. Unlike EPP charging, BPP charging is charging that does not perform negotiation, correction, or renegotiation steps between the electronic device (202) and the external device (201), and therefore can be performed based on the control of a control circuit (e.g., the control circuit (270) of FIG. 2) even while the processor (299) is in an inactive state.

[0206] According to one embodiment, when the electronic device (202) is powered off, the processor (299) may be in an inactive state. When wireless power is supplied from an external device (201), the electronic device (202) may activate a control circuit (e.g., a control circuit (270) of FIG. 2) of a wireless charging circuit (e.g., a wireless charging circuit (220) of FIG. 2) and perform a BPP charging or EPP charging operation.

[0207] Fig. 12 is a flowchart illustrating the operation of a wireless charging system according to one embodiment.

[0208] Referring to FIG. 12, a wireless charging system according to one embodiment may include a first electronic device (1201) (e.g., the electronic device (102) of FIG. 1) and a second electronic device (1202) (e.g., the electronic device (101) of FIG. 1). For example, the first electronic device (1201) may be a power supply device (e.g., the power supply device (201) of FIG. 2) and the second electronic device (1202) may be a power reception device (e.g., the power reception device (202) of FIG. 2). The first electronic device (1201) and the second electronic device (1202) of the wireless charging system according to one embodiment may support high-speed wireless charging of about 15 W or more using magnets by supporting MPP.

[0209] In operation 1210, the first electronic device (1201) can set the operating frequency to about 128 KHz. The first electronic device (1201) can output a digital ping to wake up the second electronic device (1202). For example, the first electronic device (1201) can output a digital ping having a frequency in the band of about 128 KHz. The digital ping can include a first ping and a second ping. The first electronic device (1201) can sequentially output the first ping and the second ping. The output power of the first ping can be lower than the output power of the second ping. The first electronic device (1201) can adjust the output power by adjusting the duty and voltage of the digital ping.

[0210] In operation 1221, the first electronic device (1201) may receive a signal strength packet (SSP) signal as a response from the second electronic device (1202) to the first ping signal.

[0211] In operation 1222, the first electronic device (1201) may receive an identification (ID) signal including identification information from the second electronic device (1202). The identification information may include version information, a manufacturing code, or a device identifier.

[0212] In operation 1223, the first electronic device (1201) may receive an extended identification data packet (XID) signal from the second electronic device (1202) if the second electronic device (1202) is a device capable of supporting MPP. According to one embodiment, the first electronic device (1201) may determine that the second electronic device (1202) is a device that supports MPP charging based on receiving the XID signal.

[0213] In operation 1224, the first electronic device (1201) may receive a configuration signal including configuration information related to wireless charging from the second electronic device (1202). The configuration information may include a wireless charging frequency, a maximum receivable power, or power that the second electronic device (1202) requests from the first electronic device (1201) for battery charging.

[0214] In operation 1225, the first electronic device (1201) may output an MPP pattern signal for MPP charging in response to an XID signal received from the second electronic device (1202). For example, the first electronic device (1201) may transmit the MPP pattern signal for MPP charging to the second electronic device (1202) using a frequency shift keying (FSK) method that modulates the frequency of a power signal. For example, the first electronic device (1201) may transmit the MPP pattern signal for MPP charging to the second electronic device (1202) using an amplitude shift keying (ASK) method that modulates the amplitude of a power signal.

[0215] In operation 1230, the first electronic device (1201) may perform MPP negotiation for MPP charging with the second electronic device (1202). The MPP negotiation between the first electronic device (1201) and the second electronic device (1202) may include negotiation, correction, or renegotiation steps.

[0216] In operation 1241, the first electronic device (1201) may receive, from the second electronic device (1202), associated data related to a K value indicating the degree to which the coil of the first electronic device (1201) and the coil of the second electronic device (1202) are coupled. For example, the first electronic device (1201) may receive data related to a rectified voltage or current from the second electronic device (1202).

[0217] In operation 1242, the first electronic device (1201) may determine a K value indicating a degree of coupling between a coil of the first electronic device (1201) and a coil of the second electronic device (1202) based on rectified voltage or current related data received from the second electronic device (1202). According to one embodiment, the first electronic device (1201) may transmit the determined K value to the second electronic device (1202). In this case, the second electronic device (1202) may determine a degree of coupling between a coil of the first electronic device (1201) and a coil of the second electronic device (1202) by receiving the K value from the first electronic device (1201). According to some embodiments, the second electronic device (1202) may calculate the K value independently from the first electronic device (1201). For example, the first electronic device (1201) transmits a designated packet containing the output voltage of the inverter to the second electronic device (1202), and the second electronic device (1202) can calculate the K value independently of the first electronic device (1201) by analyzing the output voltage of the inverter.

[0218] In operation 1243, the first electronic device (1201) may receive at least one charging-related data from the second electronic device (1202). The at least one charging-related data may include a control error packet (CEP), a received power packet (RPP), and / or an end of power transfer (EPT). According to one embodiment, the second electronic device (1202) may transmit a packet for re-performing a ping operation.

[0219] In operation 1244, when the first electronic device (1201) receives at least one charging-related data from the second electronic device (1202), the first electronic device (1201) may transmit a response signal to the second charging device.

[0220] In operation 1250, the first electronic device (1201) may sequentially output the first ping and the second ping again, as a step of re-outputting the digital ping when the K value is less than the designated second threshold value, as described with reference to operation 640 of FIG. 6. For example, operation 1250 may be substantially the same as operation 1210.

[0221] In operation 1261, the first electronic device (1201) may receive a signal strength packet (SSP) signal as a response from the second electronic device (1202) to the first ping signal. Operation 1261 may be substantially identical to operation 1221.

[0222] In operation 1262, the first electronic device (1201) may receive an identification (ID) signal including identification information from the second electronic device (1202). The identification information may include version information, a manufacturing code, or a device identifier. Operation 1262 may be substantially identical to operation 1222.

[0223] In operation 1263, the first electronic device (1201) may receive a configuration signal including configuration information related to wireless charging from the second electronic device (1202). The configuration information may include a wireless charging frequency, a maximum receivable power, or power that the second electronic device (1202) requests from the first electronic device (1201) for battery charging. Operation 1263 may be substantially the same as operation 1224.

[0224] In operation 1270, the first electronic device (1201) can perform EPP charging or BPP charging with the second electronic device (1202). According to an embodiment, the first electronic device (1201) can check whether the second electronic device (1202) supports EPP charging. If the second electronic device (1202) supports EPP charging, the first electronic device (1201) can perform EPP charging to wirelessly transfer power of up to about 15 W to the second electronic device (1202). According to an embodiment, if the second electronic device (1202) does not support EPP charging, the first electronic device (1201) can perform BPP charging to wirelessly transfer power of up to about 5 W to the second electronic device (1202).

[0225] An electronic device according to one embodiment of the present disclosure includes a coil, a transmission IC configured to wirelessly transmit power to an external device through the coil, and a control unit, wherein the control unit outputs a first ping and / or a second ping through the coil, counts a value N that is a cumulative number of times the first ping and / or the second ping is output, and when the value N is less than a specified first threshold and a response of the external device to the first ping is received, performs a first negotiation communication for a first wireless charging with the external device, wherein the first wireless charging is wireless charging based on an alignment state of the electronic device and the external device using a magnet, and when the value N is less than the first threshold and a response of the external device to the second ping is received, outputs the first ping and / or the second ping again, and when the value N is greater than or equal to the first threshold, performs a second negotiation communication for a second wireless charging independent of recognition of the magnet with the external device.

[0226] The control unit may switch to a standby state for detecting the approach of the external device when the N value is less than a specified first threshold value and a response from the external device to the first ping and a response from the external device to the second ping are not received.

[0227] The magnet may include a first magnet of the electronic device or a second magnet included in an accessory coupled with the electronic device.

[0228] The control unit, while performing the second negotiation communication for the second wireless charging with the external device, if receives a request signal for the third wireless charging from the external device, performs the third communication for the third wireless charging with the external device, the third wireless charging is a low-speed wireless charging based on one-way communication in which data is transmitted only from the external device to the electronic device, and the first power output by the electronic device according to the third wireless charging may be less than the second power output by the electronic device according to the second wireless charging.

[0229] The control unit may, when the N value is less than a specified first threshold value and a response from the external device to the first ping is received, check a commutation voltage of the external device, determine a K value indicating an alignment state of the coil and a second coil of the external device based on the commutation voltage, and, when the determined K value is greater than or equal to a specified second threshold value, perform the first negotiation communication with the external device, and, when the determined K value is less than the second threshold value, output the first ping and the second ping again.

[0230] The control unit may transmit a misalignment signal indicating misalignment between the electronic device and the external device to the external device when the N value is less than the first threshold value and a response from the external device to the second ping is received.

[0231] The output power of the first ping may be less than the output power of the second ping.

[0232] According to one embodiment of the present disclosure, an electronic device includes a coil, a wireless charging circuit configured to wirelessly receive power from an external device through the coil, a processor, and a memory storing instructions, wherein the instructions, when executed by the processor, cause the electronic device to: receive a ping from the external device through the coil, and, upon receiving the ping, determine whether the processor is in a wake-up state, and, if the processor is in a wake-up state, determine whether a cover accessory including a magnet is coupled to the electronic device, and, if the cover accessory is coupled to the electronic device, count a value N that is the number of times the ping has been accumulated and received, and, if the value N is less than a first threshold value, perform a first negotiation communication for a first wireless charging with the external device, wherein the first wireless charging is wireless charging based on an alignment state of the electronic device and the external device using a magnet, and, if the value N is greater than or equal to the first threshold value, perform a second negotiation communication for a second wireless charging independent of recognition of the magnet with the external device.

[0233] The above instructions, when executed by the processor, cause the electronic device to perform third communication for third wireless charging with the external device if the processor is not in the wake-up state, the third wireless charging being low-speed wireless charging based on one-way communication in which data is transmitted only from the external device to the electronic device, and a first power output by the electronic device according to the third wireless charging may be less than a second power output by the electronic device according to the second wireless charging.

[0234] The instructions, when executed by the processor, may cause the electronic device to: check a gain value representing a ratio of a rectified voltage of the electronic device to an output voltage of the external device while performing the first negotiation communication with the external device; determine a K value representing an alignment state of the coil and a second coil of the external device based on the checked gain value; and, if the determined K value is greater than or equal to a designated second threshold value, perform the first negotiation communication with the external device; and if the determined K value is less than the second threshold value, switch to a state of waiting for reception of the ping.

[0235] The above instructions, when executed by the processor, may cause the electronic device to: receive a misalignment signal from the external device, indicating misalignment of the electronic device and the external device, while performing the first negotiation communication with the external device; and, in response to the misalignment signal, output a notification indicating misalignment of the electronic device and the external device.

[0236] The ping received from the external device may include a first ping and a second ping, an output power of the first ping is lower than an output power of the second ping, and the misalignment signal may be a signal received from the external device when the electronic device performs the first negotiation communication in response to the second ping of the external device.

[0237] A driving method of an electronic device configured to wirelessly transmit power to an external device according to one embodiment of the present disclosure may include an operation of sequentially outputting a first ping and a second ping through a coil, an operation of counting a value N that is a cumulative number of times the first ping and the second ping are output, an operation of performing a first negotiation communication for a first wireless charging with the external device when the value N is less than a specified first threshold and a response of the external device to the first ping is received, wherein the first wireless charging is wireless charging based on an alignment state of the electronic device and the external device using a magnet, an operation of re-outputting the first ping and the second ping when the value N is less than the first threshold and a response of the external device to the second ping is received, and an operation of performing a second negotiation communication for a second wireless charging independent of recognition of the magnet with the external device when the value N is greater than or equal to the first threshold.

[0238] The method further includes an operation of performing third communication for the third wireless charging with the external device when a request signal for third wireless charging is received from the external device while performing the second negotiation communication for the second wireless charging with the external device, wherein the third wireless charging is low-speed wireless charging based on one-way communication in which data is transmitted only from the external device to the electronic device, and a first power output by the electronic device according to the third wireless charging may be less than a second power output by the electronic device according to the second wireless charging.

[0239] The method may further include: when the N value is less than a specified first threshold value and a response from the external device to the first ping is received, checking a commutation voltage of the external device; determining a K value indicating an alignment state of the coil and a second coil of the external device based on the commutation voltage; performing the first negotiation communication with the external device if the determined K value is greater than or equal to a specified second threshold value; and re-outputting the first ping and the second ping if the determined K value is less than the second threshold value.

[0240] The method may further include an action of transmitting a misalignment signal to the external device, the misalignment signal indicating misalignment between the electronic device and the external device, when the N value is less than the first threshold and a response from the external device to the second ping is received.

[0241] The output power of the first ping may be less than the output power of the second ping.

[0242] A driving method of an electronic device configured to wirelessly receive power from an external device according to one embodiment of the present disclosure may include: receiving a ping from the external device through a coil; determining, upon receiving the ping, whether a processor is in a wake-up state; determining, upon receiving the ping, whether a cover accessory including a magnet is coupled to the electronic device; counting, upon receiving the cover accessory from the electronic device, a value N that is the number of times the ping is accumulated and received; performing, upon receiving the value N below a first threshold value, a first negotiation communication for a first wireless charging operation with the external device, wherein the first wireless charging operation is wireless charging based on an alignment state of the electronic device and the external device using a magnet; and performing, upon receiving the value N above a first threshold value, a second negotiation communication for a second wireless charging operation that is independent of recognition of the magnet with the external device.

[0243] The method further includes an operation of performing third communication for third wireless charging with the external device when the processor is not in the wake-up state, wherein the third wireless charging is low-speed wireless charging based on one-way communication in which data is transmitted only from the external device to the electronic device, and a first power output by the electronic device according to the third wireless charging may be less than a second power output by the electronic device according to the second wireless charging.

[0244] The method may further include an operation of checking a gain value representing a ratio of a rectified voltage of the electronic device to an output voltage of the external device while performing the first negotiation communication with the external device, an operation of determining a K value representing an alignment state of the coil and a second coil of the external device based on the checked gain value, an operation of performing the first negotiation communication with the external device if the determined K value is greater than or equal to a designated second threshold value, and an operation of switching to a state of waiting for reception of the ping if the determined K value is less than the second threshold value.

Claims

1. In electronic devices, coil; A transmitter IC configured to wirelessly transmit power to an external device through the coil; and comprising a control unit, wherein the control unit is: Outputting the first ping and / or the second ping through the above coil, Counting the N value, which is the number of times the first ping and / or the second ping is cumulatively output, If the N value is less than a specified first threshold value and a response from the external device to the first ping is received, a first negotiation communication for a first wireless charging is performed with the external device, wherein the first wireless charging is wireless charging based on an alignment state of the electronic device and the external device using a magnet. If the N value is less than the first threshold and a response to the second ping is received from the external device, the first ping and / or the second ping is output again, and If the above N value is greater than or equal to the first threshold, a second negotiation communication for a second wireless charging independent of the recognition of the magnet is performed with the external device. Electronic devices.

2. In paragraph 1, The above control unit, If the N value is less than a specified first threshold value and no response from the external device to the first ping and no response from the external device to the second ping is received, switching to a standby state for detecting the approach of the external device. Electronic devices.

3. In paragraph 1, The magnet comprises a first magnet of the electronic device or a second magnet included in an accessory coupled with the electronic device. Electronic devices.

4. In paragraph 2, The control unit performs the second negotiation communication for the second wireless charging with the external device, and when receiving a request signal for the third wireless charging from the external device, performs the third communication for the third wireless charging with the external device. The above third wireless charging is a low-speed wireless charging based on one-way communication in which data is transmitted only from the external device to the electronic device. The first power output by the electronic device according to the third wireless charging is smaller than the second power output by the electronic device according to the second wireless charging. Electronic devices.

5. In paragraph 2, The above control unit If the above N value is less than the specified first threshold value and a response from the external device to the first ping is received, the rectified voltage of the external device is checked, Based on the above rectified voltage, a K value indicating the alignment state of the coil and the second coil of the external device is determined, If the determined K value is greater than or equal to the specified second threshold value, the first negotiation communication is performed with the external device, and If the determined K value is less than the second threshold value, the first ping and the second ping are output again. Electronic devices.

6. In paragraph 2, The above control unit If the N value is less than the first threshold value and a response from the external device to the second ping is received, transmitting a misalignment signal indicating misalignment of the electronic device and the external device to the external device. Electronic devices.

7. In paragraph 1, The output power of the first ping is smaller than the output power of the second ping. Electronic devices.

8. In electronic devices, coil; A wireless charging circuit configured to wirelessly receive power from an external device through the coil; processor; and Contains memory that stores instructions, The above instructions, when executed by the processor, cause the electronic device to: Receive a ping from the external device through the coil, Upon receiving the above ping, check whether the processor is in a wake-up state, When the above processor is in a wake-up state, check whether a cover accessory including a magnet is attached to the above electronic device, If the cover accessory is combined with the electronic device, the number of times the ping is accumulated and received is counted as a value N, If the N value is less than a specified first threshold value, a first negotiation communication for a first wireless charging is performed with the external device, wherein the first wireless charging is wireless charging based on an alignment state of the electronic device and the external device using a magnet, and If the N value is greater than or equal to the first threshold, a second negotiation communication for a second wireless charging independent of the recognition of the magnet is performed with the external device. Electronic devices.

9. In paragraph 8, The above instructions, when executed by the processor, cause the electronic device to perform third communication for third wireless charging with the external device if the processor is not in the wake-up state; The above third wireless charging is a low-speed wireless charging based on one-way communication in which data is transmitted only from the external device to the electronic device. The first power output by the electronic device according to the third wireless charging is smaller than the second power output by the electronic device according to the second wireless charging. Electronic devices.

10. In paragraph 8, The above instructions, when executed by the processor, cause the electronic device to: While performing the first negotiation communication with the external device, a gain value representing the ratio of the rectified voltage of the electronic device to the output voltage of the external device is checked, Based on the above-mentioned confirmed gain value, a K value indicating the alignment state of the coil and the second coil of the external device is determined, If the determined K value is greater than or equal to the specified second threshold value, the first negotiation communication is performed with the external device, and If the above-determined K value is less than the second threshold value, the state is switched to waiting for reception of the ping. Electronic devices.

11. In paragraph 8, The above instructions, when executed by the processor, cause the electronic device to: While performing the first negotiation communication with the external device, a misalignment signal indicating misalignment between the electronic device and the external device is received from the external device, and In response to the misalignment signal, output a notification indicating misalignment of the electronic device and the external device. Electronic devices.

12. In paragraph 11, The pings received from the external device include a first ping and a second ping, The output power of the above first ping is less than the output power of the above second ping, The misalignment signal is a signal received from the external device when the electronic device performs the first negotiation communication in response to the second ping of the external device. Electronic devices.

13. A method for driving an electronic device configured to wirelessly transmit power to an external device, An operation of sequentially outputting the first and second pings through the coil; An operation of counting the N value, which is the number of times the first ping and the second ping are cumulatively output, When the N value is less than a specified first threshold value and a response from an external device to the first ping is received, an operation of performing a first negotiation communication for a first wireless charging with the external device, wherein the first wireless charging is wireless charging based on an alignment state of the electronic device and the external device using a magnet. When the N value is less than the first threshold value and a response from the external device to the second ping is received, the operation of re-outputting the first ping and the second ping, and If the N value is greater than or equal to the first threshold value, the operation of performing a second negotiation communication for a second wireless charging independent of the recognition of the magnet with the external device is included. method.

14. In paragraph 13, The method further includes an operation of performing a third communication for the third wireless charging with the external device when a request signal for the third wireless charging is received from the external device while performing the second negotiation communication for the second wireless charging with the external device. The above third wireless charging is a low-speed wireless charging based on one-way communication in which data is transmitted only from the external device to the electronic device. The first power output by the electronic device according to the third wireless charging is smaller than the second power output by the electronic device according to the second wireless charging. method.

15. In paragraph 13, The above method, An operation of checking a rectified voltage of the external device when the N value is less than a specified first threshold value and a response from the external device to the first ping is received; An operation of determining a K value indicating an alignment state of the coil and the second coil of the external device based on the above rectified voltage; If the determined K value is greater than or equal to a specified second threshold value, an operation of performing the first negotiation communication with the external device, and If the determined K value is less than the second threshold value, further comprising an operation of re-outputting the first ping and the second ping. method.

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