KR20230085808A - method for detecting foreign object and electronic device - Google Patents

Abstract

The present invention relates to a method for detecting foreign substances to prevent an accident occurring due to foreign substances during wireless power transmission and reception and an electronic device. According to the present invention, an electronic device capable of transmitting and receiving wireless power comprises a wireless power transfer (WPT) coil and a processor operatively connected to the WPT coil. The processor transmits a first ping signal to an external object through the WPT coil; check the waveform of a current or voltage measured during or after transmission of the first ping signal; acquires a Q factor on the basis of the checked waveform; when the acquired Q factor is less than a predetermined Q factor, determine that an external object is or includes a foreign substance and is located at the center of the WPT coil to control a power transmission operation; when the acquired Q factor is greater than or equal to the determined Q factor, transmit a second ping signal to the external object through the WPT coil; check the waveform of a current or voltage during or after transmission of the second ping signal; check the inductance measured at both ends of the WPT coil on the basis of the checked waveform; and determine that the external object is or includes a foreign substance and is located around the WPT coil on the basis of the measured inductance to control the power transmission operation.

Description

Method for detecting foreign object and electronic device {method for detecting foreign object and electronic device}

Various embodiments of the present disclosure relate to a foreign material detection method and an electronic device.

An electronic device may perform wireless charging or non-contact charging using wireless power transfer technology. Wireless power transmission technology may be a technology in which power is wirelessly transferred from a power transmission device to a power reception device to charge a battery of the power reception device without a separate connector connection between the power reception device and the power transmission device. The wireless power transmission technology may include a magnetic induction method and a magnetic resonance method, and may include various types of wireless power transmission technology in addition to these.

When power is transmitted and received wirelessly between electronic devices, a safety accident may occur due to a foreign object interfering with power transmission. However, there is a problem in that a method of detecting a foreign object is determined by an electronic device that transmits external power, and thus safety varies depending on the performance of the electronic device that transmits power wirelessly.

In general, an electronic device can detect the location of a foreign object only when the location of the foreign object is located at the center of a power transmission/reception coil. Therefore, when the foreign material is located outside the power transceiving coil, it may be difficult for the electronic device to detect the foreign material. When foreign substances are located outside the power transmission/reception coil, power transmission efficiency may decrease or heat may be generated.

An electronic device capable of receiving wireless power according to an embodiment of the present invention may provide a method for detecting a foreign object before receiving wireless power.

An electronic device capable of transmitting and receiving wireless power according to various embodiments of the present disclosure includes a wireless power transfer (WPT) coil and a processor operatively connected to the WPT coil, wherein the processor transmits a first ping signal to the WPT Control transmission to an external object through a coil, check a waveform of current or voltage measured during or after transmission of the first ping signal, obtain a Q factor based on the checked waveform, and obtain the Q If the factor is less than the predetermined Q factor, it is determined that the external object is or contains a foreign object and is located at the center of the WPT coil to control the power transmission operation, and the obtained Q factor is the predetermined Q factor. factor or more, transmits a second ping signal to the external object through the WPT coil, checks a waveform of current or voltage during or after transmission of the second ping signal, and based on the checked waveform, the WPT The inductance measured at both ends of the coil is checked, and based on the measured inductance, it is determined that the external object is or contains a foreign substance and is located around the WPT coil, so that power transmission operation can be controlled.

An electronic device capable of transmitting and receiving wireless power according to various embodiments of the present disclosure includes a wireless power transfer (WPT) coil and a processor operatively connected to the WPT coil, wherein the processor transmits a first ping signal to the WPT Transmits to an external object through a coil, checks a current or voltage waveform during or after transmission of the first ping signal, obtains a Q factor based on the checked waveform, and based on the checked waveform, the WPT Inductance is measured at both ends of the coil, and if the confirmed Q factor is greater than or equal to the predetermined Q factor and the measured inductance is less than the predetermined inductance, the external object is or contains foreign matter, and is located around the WPT coil. It is determined that the power transmission operation can be controlled.

A foreign material detection method of an electronic device capable of transmitting and receiving wireless power using a wireless power transfer (WPT) coil according to various embodiments of the present disclosure includes transmitting a first ping signal to an external object through the WPT coil; checking a waveform of current or voltage measured during or after transmission of the first ping signal; obtaining a Q factor based on the identified waveform; controlling a power transmission operation by determining that the external object is or includes a foreign object and is located at the center of the WPT coil when the obtained Q factor is less than a predetermined Q factor; transmitting a second ping signal to the external object through the WPT coil when the obtained Q factor is greater than or equal to the predetermined Q factor; checking a current or voltage waveform during or after transmission of the second ping signal; Checking inductance measured at both ends of the WPT coil based on the checked waveform; and controlling a power transmission operation by determining that the external object is or includes a foreign substance and is located around the WPT coil based on the measured inductance.

A foreign material detection method of an electronic device capable of transmitting and receiving wireless power using a wireless power transfer (WPT) coil according to various embodiments of the present disclosure includes transmitting a first ping signal to an external object through the WPT coil; checking a current or voltage waveform during or after transmission of the first ping signal; obtaining a Q factor based on the identified waveform; measuring inductance at both ends of the WPT coil based on the identified waveform; and if the checked Q factor is greater than or equal to the predetermined Q factor and the measured inductance is less than the predetermined inductance, it is determined that the external object is or contains a foreign material and is located around the WPT coil, and the power transmission operation is controlled. action may be included.

The foreign matter detection method and electronic device according to an embodiment of the present disclosure can prevent safety accidents that may occur due to foreign matter during wireless power transmission/reception by detecting the foreign matter regardless of the location of the foreign matter.

In connection with the description of the drawings, the same or similar reference numerals may be used for the same or similar elements.
1 is a block diagram of an electronic device in a network environment according to various embodiments of the present disclosure.
2 is a diagram schematically illustrating an operation of transmitting and receiving power between a power receiving device and a power transmitting device according to an embodiment of the present disclosure.
3A is a schematic block diagram of a power receiving device according to an embodiment of the present disclosure.
3B is a schematic block diagram of a power transmission device according to an embodiment of the present disclosure.
4A is a diagram illustrating a wireless charging operation between a power receiving device and a power transmitting device according to an embodiment of the present disclosure.
4B is a diagram illustrating a wireless charging operation between a power receiving device and a power transmitting device according to an embodiment of the present disclosure.
4C is a diagram illustrating a wireless charging operation between a power receiving device and a power transmitting device according to an embodiment of the present disclosure.
5A and 5B are flowcharts illustrating a method of detecting a foreign object in an electronic device according to an embodiment of the present disclosure.
6A and 6B are flowcharts illustrating a method of detecting a foreign material in an electronic device according to an embodiment of the present disclosure.
7A and 7B are flowcharts illustrating a method of detecting a foreign material in an electronic device according to an embodiment of the present disclosure.
8 is a flowchart illustrating a foreign material detection method of an electronic device according to various embodiments of the present disclosure.
9A to 9C are diagrams illustrating locations between coils and locations of foreign substances according to various embodiments of the present disclosure.
10 is a graph in which Q factors are measured according to the presence and location of foreign substances according to various embodiments of the present disclosure.
11 is a graph in which coupling inductance is measured according to the presence and location of foreign substances according to various embodiments of the present disclosure.
12 is a graph obtained by measuring coupling inductance according to the presence and location of foreign substances according to various embodiments of the present disclosure.

1 is a block diagram of an electronic device 101 within a network environment 100, according to various embodiments.

Referring to FIG. 1 , in a network environment 100, an electronic device 101 communicates with an electronic device 102 through a first network 198 (eg, a short-range wireless communication network) or through a second network 199. It may communicate with at least one of the electronic device 104 or the server 108 through (eg, a long-distance wireless communication network). According to one embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108 . According to an embodiment, the electronic device 101 includes 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), interface 177, connection terminal 178, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196 , or the antenna module 197 may be included. In some embodiments, in the electronic device 101, at least one of these components (eg, the connection terminal 178) may be omitted or one or more other components may be added. In some embodiments, some of these components (eg, sensor module 176, camera module 180, or antenna module 197) are integrated into a single component (eg, display module 160). It can be.

The processor 120, for example, executes software (eg, the program 140) to cause at least one other component (eg, hardware or software component) of the electronic device 101 connected to the processor 120. It can control and perform various data processing or calculations. According to one embodiment, as at least part of data processing or operation, the processor 120 transfers instructions or data received from other components (e.g., sensor module 176 or communication module 190) to volatile memory 132. , processing commands or data stored in the volatile memory 132 , and storing resultant data in the non-volatile memory 134 . According to one embodiment, the processor 120 may include a main processor 121 (eg, a central processing unit or processor) or a co-processor 123 (eg, a graphics processing unit, a neural network processing unit (NPU) that may operate independently of or together with the main processor 121). : neural processing unit), image signal processor, sensor hub processor, or communication processor). For example, when the electronic device 101 includes the main processor 121 and the auxiliary processor 123, the auxiliary processor 123 may use less power than the main processor 121 or be set to be specialized for a designated function. can The secondary processor 123 may be implemented separately from or as part of the main processor 121 .

The secondary processor 123 may, for example, take the place of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or the main processor 121 is active (eg, running an application). ) state, together with the main processor 121, at least one of the components of the electronic device 101 (eg, the display module 160, the sensor module 176, or the communication module 190) It is possible to control at least some of the related functions or states. According to one embodiment, the auxiliary processor 123 (eg, image signal processor or communication processor) may be implemented as part of other functionally related components (eg, camera module 180 or communication module 190). there is. According to an embodiment, the auxiliary processor 123 (eg, a neural network processing device) may include a hardware structure specialized for processing an artificial intelligence model. AI models can be created through machine learning. Such learning may be performed, for example, in the electronic device 101 itself where the artificial intelligence model is performed, or may be performed through a separate server (eg, the server 108). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning or reinforcement learning, but in the above example Not limited. The artificial intelligence model may include a plurality of artificial neural network layers. Artificial neural networks include deep neural networks (DNNs), convolutional neural networks (CNNs), recurrent neural networks (RNNs), restricted boltzmann machines (RBMs), deep belief networks (DBNs), bidirectional recurrent deep neural networks (BRDNNs), It may be one of deep Q-networks or a combination of two or more of the foregoing, but is not limited to the foregoing examples. The artificial intelligence model may include, in addition or alternatively, software structures in addition to hardware structures.

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

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 .

The input module 150 may receive a command or data to be used by a component (eg, the processor 120) of the electronic device 101 from the outside of the electronic device 101 (eg, a user). The input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (eg, a button), or a digital pen (eg, a stylus pen).

The sound output module 155 may output sound signals to the outside of the electronic device 101 . The sound output module 155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as multimedia playback or recording playback. A receiver may be used to receive an incoming call. According to one embodiment, the receiver may be implemented separately from the speaker or as part of it.

The display module 160 may visually provide information to the outside of the electronic device 101 (eg, a user). The display module 160 may include, for example, a display, a hologram device, or a projector and a control circuit for controlling the device. According to one embodiment, the display module 160 may include a touch sensor set to detect a touch or a pressure sensor set to measure the intensity of force generated by the touch.

The audio module 170 may convert sound into an electrical signal or vice versa. According to one embodiment, the audio module 170 acquires sound through the input module 150, the sound output module 155, or an external electronic device connected directly or wirelessly to the electronic device 101 (eg: Sound may be output through the electronic device 102 (eg, a speaker or a headphone).

The sensor module 176 detects an operating state (eg, power or temperature) of the electronic device 101 or an external environmental state (eg, a user state), and generates an electrical signal or data value corresponding to the detected state. can do. According to one embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a bio sensor, It may include a temperature sensor, humidity sensor, or light sensor.

The interface 177 may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device 101 to an external electronic device (eg, the electronic device 102). According to 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.

The connection terminal 178 may include a connector through which the electronic device 101 may be physically connected to an external electronic device (eg, the 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 (eg, a headphone connector).

The haptic module 179 may convert electrical signals into mechanical stimuli (eg, vibration or motion) or electrical stimuli that a user may perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 may capture still images and moving images. According to one embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

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

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

The communication module 190 is a direct (eg, wired) communication channel or a wireless communication channel between the electronic device 101 and an external electronic device (eg, the electronic device 102, the electronic device 104, or the server 108). Establishment and communication through the established communication channel may be supported. The communication module 190 may include one or more communication processors that operate independently of the processor 120 (eg, an application processor) and support direct (eg, wired) communication or wireless communication. According to one embodiment, the communication module 190 is a wireless communication module 192 (eg, 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 (eg, : a local area network (LAN) communication module or a power line communication module). Among these communication modules, a corresponding communication module is a first network 198 (eg, a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network 199 (eg, legacy It may communicate with the external electronic device 104 through a cellular network, a 5G network, a next-generation communication network, the Internet, or a telecommunications network such as a computer network (eg, a LAN or a WAN). These various types of communication modules may be integrated as one component (eg, a single chip) or implemented as a plurality of separate components (eg, multiple chips). The wireless communication module 192 uses subscriber information (eg, International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 196 within a communication network such as the first network 198 or the second network 199. The electronic device 101 may be identified or authenticated.

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

The antenna module 197 may transmit or receive signals or power to the outside (eg, an external electronic device). According to 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 (eg, PCB). According to one embodiment, the antenna module 197 may include a plurality of antennas (eg, 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 is selected from the plurality of antennas by the communication module 190, for example. can be chosen 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. According to some embodiments, other components (eg, a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module 197 in addition to the radiator.

According to various embodiments, the antenna module 197 may form a mmWave antenna module. According to one embodiment, the mmWave antenna module includes a printed circuit board, an RFIC disposed on or adjacent to a first surface (eg, a lower surface) of the printed circuit board and capable of supporting a designated high frequency band (eg, mmWave band); and a plurality of antennas (eg, array antennas) disposed on or adjacent to a second surface (eg, a top surface or a side surface) of the printed circuit board and capable of transmitting or receiving signals of the designated high frequency band. can do.

At least some of the components are connected to each other through a communication method between peripheral devices (eg, a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and signal ( e.g. commands or data) can be exchanged with each other.

According to an embodiment, commands or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199 . Each of the external electronic devices 102 or 104 may be the same as or different from the electronic device 101 . According to an embodiment, all or part of operations executed in the electronic device 101 may be executed in one or more external electronic devices among the external electronic devices 102 , 104 , or 108 . For example, when the electronic device 101 needs to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device 101 instead of executing the function or service by itself. Alternatively or additionally, one or more external electronic devices may be requested to perform the function or at least part of the service. One or more external electronic devices receiving the request may execute at least a part of the requested function or service or an additional function or service related to the request, and deliver the execution result to the electronic device 101 . The electronic device 101 may provide the result as at least part of a response to the request as it is or additionally processed. To this end, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device 101 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device 104 may include an internet of things (IoT) device. Server 108 may be an intelligent server using machine learning and/or neural networks. According to one embodiment, the external electronic device 104 or server 108 may be included in the second network 199 . The electronic device 101 may be applied to intelligent services (eg, smart home, smart city, smart car, or health care) based on 5G communication technology and IoT-related technology.

2 is a diagram schematically illustrating an operation of transmitting and receiving power between a power receiving device 201 and a power transmitting device 203 according to an embodiment of the present disclosure.

The power receiving device 201 and the power transmitting device 203 may include the same configuration as the electronic device 101 of FIG. 1 .

For example, the electronic device 101 may include at least one of a power receiving device 201 and/or a power transmitting device 203 .

In one embodiment, the power transmission device 203 may transfer power to the power reception device by using a magnetic induction phenomenon in which a current is induced in the reception coil 311L by changing the magnetic field of the transmission coil 321L.

In various embodiments, the power receiving device 201 and the power transmitting device 203 may support at least one wireless charging method among a magnetic induction method, a magnetic resonance method, and/or an electromagnetic wave method.

In one embodiment, one power transmission device 203 may charge a plurality of power reception devices 201 .

In various embodiments, a plurality of power transmission devices 203 may charge at least one power reception device 201 .

3A is a schematic block diagram of a power receiving device 201 according to an embodiment of the present disclosure.

3B is a schematic block diagram of a power transmission device 203 according to an embodiment of the present disclosure.

According to an embodiment, referring to FIGS. 3A and 3B , the power transmission device 203 may supply power to the power reception device 201 wirelessly, and the power reception device (eg, the electronic device of FIG. 1 ) (101)) may receive power wirelessly. Meanwhile, the roles of the power receiving device 201 and the power transmitting device 203 in the wireless charging function are not limited to those of FIGS. 3A and 3B, and may be applied even if they are opposite to each other. For example, a smart phone or wearable device may serve as the power receiving device 201 and the smart phone may serve as the power transmitting device 203 .

According to an embodiment, the power receiving device 201 includes a power receiving circuit 311, a processor 312 (eg, the processor 120 of FIG. 1), a communication circuit 313 (eg, the communication module of FIG. 1 ( 190)), sensor(s) 314 (e.g., sensor module 176 of FIG. 1), display 315 (e.g., display module 160 of FIG. 1), and/or sensing circuitry 316. can include

According to an embodiment, the power receiving circuit 311 is a receiving coil 311L that wirelessly receives power from the power transmission device 203, and efficiency between the transmitting coil 321L and the receiving coil 311L through impedance matching. A matching circuit 311a that raises , a rectifier circuit 311b that rectifies the received AC power to DC, a regulating circuit 311c that adjusts the charging voltage, a switch circuit 311d, and/or a battery 311e (eg: battery 189 of FIG. 1). For example, the power reception circuit 311 may be included in a receiver integrated circuit (RxIC).

According to an embodiment, the communication circuit 313 may include at least one of a first communication circuit 313a and a second communication circuit 313b. The first communication circuit 313a may communicate with the power transmission device 203 through the receiving coil 311L. The second communication circuit 313b uses at least one of various short-range communication methods such as Bluetooth, Bluetooth low energy (BLE), Wi-Fi, Wi-Fi direct, or near field communication (NFC). It can be used to communicate with the power transmission device 203. The second communication circuit 313b may include an antenna 313c capable of communicating with an external electronic device (eg, another electronic device). For example, the communication circuit 313 may be included in a receiver integrated circuit (RxIC).

According to one embodiment, the first communication circuit 313a is connected to the first communication circuit 323a of the power transmission device 203 using, for example, a frequency band identical to or adjacent to the power signal frequency in the coil 311L. Can communicate (e.g. in-band). The first communication circuit 313a is, for example, in various embodiments, the first communication circuit 323a of the power transmission device 203 and the first communication circuit 313a of the power reception device 201 are in-band. can communicate with The first communication circuit 313a of the power reception device 201 may communicate with the power transmission device 203 using the receiving coil 311L for receiving power from the power transmission device 203 . The power receiving device 201 and the power transmitting device 203 may communicate using coils 311L and 321L for transmitting and receiving power.

The coils 311L and 321L of FIGS. 2, 3A and 3B may be wireless power transfer (WPT) coils.

According to an embodiment, when the power receiver 201 receives a signal or power transmitted from the power transmitter 203 through the coil 311L, the power receiver 201 for transmitting to the power transmitter 203 The communication circuit 313 may be controlled to generate device information or power information of ). The generated power information may be transmitted to the power transmission device 203 through the coil 311L. Alternatively, the generated power information may be delivered to the power transmitter 203 through a separate antenna (eg, the antenna 313c). For example, the power information may be information related to charging power of the power receiving device 201 (eg, received power, voltage, or current state), or output power of the power transmitting device 203, output voltage information, Charging current information or information related thereto may be included. For example, the power information may include information requesting a change in transmission power of the power transmission device 203 .

According to an embodiment, the power receiving device 201 may charge the battery 311e through a charging circuit using the power received from the power transmitting device 203 through the power receiving circuit 311 . When a magnetic field is formed in the coil (eg, the transmission coil (Tx coil) 321L) of the power transmission device 203, the coil (eg, the reception coil (Rx coil) 311L) of the power reception device 201 is electromagnetic Current flows by induction or resonance, and the battery 311e can be charged through the charging circuit using this current.

According to one embodiment, the sensing circuit 316 may detect that the power receiving device 201 is detached from the power transmitting device 203 . For example, the detection circuit 316 may include at least one of a hardware detachment detection circuit and a software detachment detection algorithm. For example, the power reception device 201 may utilize the detection circuit 316 by performing an update on the detachment detection function through a software update even if the detachment detection circuit is not included in the manufacturing process.

According to an embodiment, the detection circuit 316 may detect the power transmission device 203 by detecting a search signal or received power from the power transmission device 203 . The sensing circuit 316 outputs the signal of the input/output terminal of the coil 311L or the matching circuit 311a or the rectifier circuit 311b by the coil 311L signal generated by the signal output from the power transmission device 203. change can be detected. The sensing circuit 316 may obtain information about motion of the power receiving device 201 . The sensing circuit 316 may obtain information about the temperature from at least one sensor 314 (eg, a temperature sensor or a heart rate monitor (HRM) sensor). For example, the sensing circuit 316 may be included in a receiver integrated circuit (RxIC).

According to an embodiment, the display 315 may display various types of display information required for wireless power transmission and reception.

According to one embodiment, the sensor(s) 314 may include at least some of a current/voltage sensor, a temperature sensor, an ambient light sensor, or a sound sensor. The temperature sensor may measure the temperature of the battery 311e.

According to an embodiment, the processor 312 may determine charging control based on a change in temperature of the inside of the power receiver 201 or of the battery 311e measured by a temperature sensor over time.

According to an embodiment, the processor 312 may perform overall control of the power receiving device 201, generate various messages required for wireless power transmission, and transmit them to the communication circuit 313.

According to an embodiment, the processor 312 may charge the battery 311e through a charging circuit using power received from the power transmission device 203 through the power receiving circuit 311 . While charging the battery 311e, the processor 312 may check situation information related to an operation of charging the battery 311e. For example, the situation information related to the operation of charging the battery 311e is information related to the fully-charged state of the battery 311e based on the capacity of the battery 311e, whether or not the battery 311e is abnormal, for example , information related to a swelling state, or a heating state of the power receiving device 201.

According to an embodiment, the processor 312 is configured to stop power output so that the power transmission device 203 stops an operation of wirelessly outputting power, based at least on situation information related to an operation of charging the battery 311e. A corresponding signal can be transmitted to the power transmission device 203 . For example, the processor 312 outputs power so that the power transmission device 203 stops an operation of wirelessly outputting power when it is determined that the power receiver 201 is in at least one state of a temperature higher than a specified temperature or a fully charged state. It can be controlled to transmit a signal corresponding to the stop of the power transmission device 203.

According to one embodiment, the processor 312 controls the power reception circuit 311 so that the power transmission device 203 does not receive the power output wirelessly or responds to a signal received from the power transmission device 203. At least a part of the internal configuration of the power receiver 201 (eg, the communication circuit 313 or the power receiver circuit 311) may be controlled so as not to For example, the processor 312 may be included in a receiver integrated circuit (RxIC).

According to an embodiment, the processor 312 determines whether at least one of a signal for resuming charging or a signal related to a detachment state of the power transmission device 203 is detected in a state in which power output of the power transmission device 203 is stopped. can be checked. For example, when the remaining amount of the battery 311e measured after a predetermined time elapses in the fully charged state of the battery 311e is less than a predefined value or when the temperature of the battery 311e is less than a predefined value, the processor ( 312) may determine that the signal for resuming charging is detected. However, it is not limited thereto.

According to one embodiment, the processor 312 checks whether power can be received from the power transmission device 203 located adjacent to the power transmission device 203 in a state in which power output is stopped (eg, For example, when a signal related to the detachment state (eg, ping) is received), and the charge resume condition of the battery 311e is checked and the charge resume condition is satisfied (for example, after a predetermined time has elapsed, the measured When the remaining amount of the battery 311e is less than a predefined value or when the temperature of the battery 311e is less than a predefined value), the battery 311e may be controlled to be charged through a charging circuit.

According to an embodiment, the processor 312 transmits power based on at least one of a signal for resuming charging of the battery 311e and a signal related to a detached state of the power receiver 201 from the power transmitter 203. A signal corresponding to resumption of power output may be transmitted to the power transmission device 203 so that the device 203 resumes an operation of outputting power wirelessly. In an embodiment, the processor 312 may receive power transmitted from the power transmission device 203 based on transmitting a signal corresponding to resumption of power output.

According to an embodiment, the processor 312 determines the power transmission device 203 based on at least one of a signal for resuming charging of the battery 311e or whether the power reception device 201 is detached or detached from the power transmission device 203. ) can be controlled to respond to a signal or power from the power transmission device 203 to resume an operation of outputting power wirelessly.

According to one embodiment, the processor 312 receives a signal about the state of the sensing circuit 316 from the power receiving circuit 311 when detachment of the power transmission device 203 is detected through the sensing circuit 316. can For example, the signal for the state of the sensing circuit 316 may be the sensing circuit 316 going from a low state (eg, attached) to a high state (eg, detached state). state) may be included.

According to an embodiment, the processor 312 may transmit a signal corresponding to inactivation of the power reception circuit 311 to the power reception circuit 311 based on at least situation information related to an operation of charging the battery 311e. there is. Alternatively, the deactivation operation of the power reception circuit 311 controls not to transmit a response signal to the power transmission device 203 for a confirmation signal for confirming the power reception device 201 received from the power transmission device 203. action may be included.

According to one embodiment, the processor 312 responds to activation of the power reception circuit 311 based on at least a signal for resuming charging of the battery 311e or a signal related to the detachment state of the power transmission device 203. A signal can be transmitted to the power receiving circuit 311 . Alternatively, the operation for activating the power reception circuit 311 may include an operation of transmitting a response signal to the power signal received from the power transmission device 203 to the power transmission device 203 .

Referring to FIG. 3B, the power transmission device 203 may include a power transmission circuit 321, a processor 322, a communication circuit 323, a sensing circuit 324, and/or a security module 325. can

According to one embodiment, the power transmission circuit 321 receives power (or power) from the outside and appropriately converts the voltage of the input power to a power adapter 321a, a power generation circuit 321b to generate power, and/or a matching circuit 321c that increases efficiency between the transmitting coil 321L and the receiving coil 311L.

According to an embodiment, the power transmission circuit 321 is one of a power adapter 321a, a power generation circuit 321b, a transmission coil 321L, or a matching circuit 321c to enable transmission of power to a plurality of power reception devices. A plurality of at least some of them may be included.

According to an embodiment, the power transmission circuit 321 includes a first signal of a first frequency and a power transmission device 203 for providing first power to the power reception device 201 using the power generation circuit 321b. A second signal of a second frequency may be generated to provide a second power.

According to an embodiment, the processor 322 may perform overall control of the power transmission device 203, generate various messages required for wireless power transmission, and transmit them to the communication circuit 323.

According to an embodiment, the processor 322 may calculate power (or amount of power) to be transmitted to the power receiver 201 based on information received from the communication circuit 323 .

According to an embodiment, the processor 322 may control the power transmission circuit 321 to transmit power calculated based on information received through the transmission coil 321L to the power reception device 201 .

According to an embodiment, the processor 322 transmits power to a plurality of power receiving devices, respectively, to a first signal of a first frequency for providing a first power to a first external electronic device and to a second external electronic device. The power generation circuit 321b may be controlled to generate a second signal of a second frequency to provide the second power.

According to an embodiment, the communication circuit 323 may include at least one of a first communication circuit 323a and a second communication circuit 323b. The first communication circuit 323a communicates with the first communication circuit 313a of the power reception device 201 using, for example, a frequency band identical to or adjacent to a frequency used by the transmission coil 321L for power transmission. It can be done (e.g. in-band method). For example, the first communication circuit 313a may communicate using a transmission coil 321L for transferring power generated by the power generation circuit 321b to the power receiving device 201 .

According to various embodiments, the first communication circuit 323a of the power transmission device 203 and the first communication circuit 313a of the power reception device 201 may communicate in an in-band manner. The first communication circuit 323a of the power transmission device 203 may communicate with the power reception device 201 using the transmission coil 321L for transferring power to the power reception device 201 . The first communication circuit 313a of the power reception device 201 may communicate with the power transmission device 203 using the receiving coil 311L for receiving power from the power transmission device 203 . The power receiving device 201 and the power transmitting device 203 may communicate using coils 311L and 321L for transmitting and receiving power.

According to an embodiment, the second communication circuit 323b uses, for example, a frequency band different from the frequency used by the transmission coil 321L for power transmission, and the second communication circuit of the power reception device 201 ( 313b) and can communicate (eg, out-of-band method). For example, the second communication circuit 323b uses various short-range communication methods such as Bluetooth, Bluetooth low energy (BLE), Wi-Fi, Wi-Fi direct, or near field communication (NFC). At least one of them can be used. The second communication circuit 323b may include an antenna 323c capable of communicating with an external electronic device (eg, the power receiving device 201). The processor 322 may obtain information related to the state of charge (eg, Vrec information, Iout information, various packets, and/or messages) from the communication circuit 323, 323a, or 323b. The processor 322 may adjust power supplied to the power receiver 201 based on the information related to the state of charge.

According to one embodiment, the security module 325 enables encryption of transmitted data when data is transmitted through the second communication circuit 323b.

According to one embodiment, the security module 325 may be utilized for data encryption when data is transmitted through the second communication circuit 323b.

According to an embodiment, the security module 325 may be connected to the processor 322 and/or the second communication circuit 323b to transmit/receive data. The security module 325 may perform an authentication procedure or utilize data stored in the security module 325 while transmitting and receiving data with the processor 322 and/or the second communication circuit 323b.

According to one embodiment, the security module 325 may be included in the processor 322 and implemented as an integrated circuit.

According to one embodiment, the processor 322 enables data to be encrypted when data is transmitted through the second communication circuit 323b.

According to one embodiment, the processor 322 may be connected to the second communication circuit 323b to transmit and receive data. The processor 322 may perform an authentication procedure or utilize data stored in the security module 325 while transmitting and receiving data with the second communication circuit 323b.

The power transmission device 203 may further include a policy manager (not shown) related to the communication method or charging policy of the second communication circuit 323b.

In one embodiment, the policy manager checks the power state (eg, voltage, current, and/or power) of the power receiving device 201 communicatively connected through the first communication circuit 323a or the second communication circuit 323b. And, when authentication of the power receiving device 201 is completed, a power state for charging may be changed.

In one embodiment, the processor 322 determines the power state (eg, voltage, current, and/or power) of the power receiving device 201 communicatively connected through the first communication circuit 323a or the second communication circuit 323b. , and when authentication of the power receiving device 201 is completed, a power state for charging may be changed.

According to an embodiment, the sensing circuit 324 may include one or more sensors, and may detect at least one state of the power transmission device 203 using the one or more sensors.

According to an embodiment, the sensing circuit 324 may include at least one of a temperature sensor, a motion sensor, or a current (or voltage) sensor, and detects a temperature state of the power transmission device 203 using the temperature sensor. The motion state of the power transmission device 203 can be detected using a motion sensor, and the state of the output signal of the power transmission device 203 using a current (or voltage) sensor, for example, the current size , voltage magnitude, or power magnitude can be sensed.

According to one embodiment, the current (or voltage) sensor may measure a signal from the power transmission circuit 321 . A signal may be measured in at least a partial region of the coil 321L, the matching circuit 321c or the power generation circuit 321b. For example, the current (or voltage) sensor may include a circuit for measuring a signal at a front end of the coil 321L.

According to an embodiment, the power transfer circuit 321 may be a foreign object detection (FOD) circuit.

According to various embodiments, the sensing circuit 324 may be a circuit for foreign object detection (FOD).

According to an embodiment, the processor 322 may transmit power for charging the battery 311e of the power receiver 201 to the power receiver 201 .

According to an embodiment, the processor 322 transmits a signal corresponding to the stop of power output to the power receiver to stop the operation of wirelessly outputting power, based at least on the situation information related to the operation of charging the battery 311e. When received from 201, the operation of outputting power can be stopped.

According to an embodiment, the processor 322 may receive a signal corresponding to resumption of power output from the power receiver 201 to resume an operation of outputting power wirelessly. In response to receiving a signal corresponding to the resumption of power output, the processor 322 may output power wirelessly and transmit the power to the power receiver 201 .

4A is a diagram illustrating a wireless charging operation between a power receiving device 201 and a power transmitting device 203 according to an embodiment of the present disclosure.

4B is a diagram illustrating a wireless charging operation between a power receiving device 201 and a power transmitting device 203 according to an embodiment of the present disclosure.

4C is a diagram illustrating a wireless charging operation between a power reception device 201 and a power transmission device 203 according to an embodiment of the present disclosure. The power reception device 201 receives wireless power from the power transmission device 203. can receive The power receiving device 201 may be, for example, a smart phone or a wearable device.

The power transmitter 203 may transmit wireless power to the power receiver 201 . The power transmission device 203 may be, for example, a wireless charger, a smart phone, or a wearable device.

The power receiving device 201 and the power transmitting device 203 may transmit and receive power using a wireless power transfer (WPT) coil included in each. For example, the power transmission device 203 transmits power to the power reception device 201 using a WPT coil (eg, coil 321L), and the power reception device 201 transmits power to the WPT coil (eg, the coil 321L). For example, power may be received from the power transmission device 203 using the coil 311L.

The electronic devices 101 may transmit and receive wireless power to each other. At least one of the electronic devices 101 may be a power receiving device 201 and at least one of the electronic devices 101 may be a power transmitting device 203 . The electronic devices 101 may transmit and receive power using a wireless power transfer (WPT) coil included in each electronic device 101 . The electronic device 101 may include a power receiving device 201 and/or a power transmitting device 203 .

Referring to FIG. 4A, the power receiving device 201 may be a smart phone, and the power transmitting device 203 may be a wireless charger. Referring to FIG. 4B, the electronic device 101 may include the power receiving device 201 and the power It may be a smart phone that includes the transmitting device 203 .

Referring to FIG. 4C , the power transmission device 203 may be a smart phone, and the power reception device 201 may be an earbud or a wearable device.

5A and 5B are flowcharts illustrating a method of detecting a foreign object in an electronic device 101 according to an embodiment of the present disclosure.

The electronic device 101 according to an embodiment may be an electronic device including the power transmission device 203 mentioned in FIGS. 2 and 3 .

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , in operation 501, a first ping signal may be transmitted to an external object.

In one embodiment, the electronic device 101 may monitor whether an external object exists on the wireless power interface.

In one embodiment, the external object includes an external electronic device capable of receiving power (eg, the power receiving device 201), an external electronic device incapable of receiving power, a foreign object, or an external object including a foreign object. It may be an electronic device (eg, the power receiving device 201). For example, the external electronic device including the foreign material may be the power receiving device 201 placed on the electronic device 101 together with the foreign material.

For example, the electronic device 101 periodically transmits low power using the sensing circuit 324 or the power transmission circuit 321 and detects the amount of change in the received power to determine whether an external object exists on the wireless power interface. can be monitored.

In one embodiment, in operation 501, the electronic device 101 may receive a response signal to the first ping signal from the power receiving device 201 and perform an operation for power transmission.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 501, the first ping signal may be transmitted through the transmission coil 321L (eg, WPT coil) of the power transmission circuit 321.

In one embodiment, the first ping signal may have a predetermined frequency.

In various embodiments, the first ping signal may have a variable frequency, the frequency of which may be changed.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , in operation 503, the response of the external object may be checked.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 503, a response of the external object corresponding to the first ping signal may be checked. For example, the response of the external object may be a signal strength packet.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 503, if there is a response from the external object corresponding to the first ping signal, it may be determined that the external object includes an external electronic device capable of receiving power (eg, the power receiving device 201). In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 503, if there is no response from the external object corresponding to the first ping signal, the external object includes an object that cannot receive power (eg, an external electronic device or foreign object that cannot receive power) It can be judged that For example, when the external object is an object that cannot receive power, the power transmission operation may be stopped.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , in operation 505, a Q factor may be obtained.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 505, the Q factor may be obtained based on the measured power, voltage, or current by measuring the power, voltage, or current during transmission of the first ping signal or after transmission of the first ping signal.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 505, the power, voltage or current of the transmitting coil 321L (eg, WPT coil) is measured during transmission of the first signal or after transmission of the first ping signal, and based on the measured power, voltage or current Thus, the Q factor can be obtained.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 505, the waveform of the power, voltage or current of the transmitting coil 321L (eg, WPT coil) is measured during transmission of the first ping signal or after transmission of the first ping signal, and the measured power, voltage or A Q factor can be obtained based on the waveform of the current.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 507, it may be determined whether the obtained Q factor is greater than or equal to a predetermined Q factor.

In one embodiment, if the obtained Q factor is greater than or equal to the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, Under the control of the processor 322 of FIG. 3B , operation 507 may branch to operation 509 .

In one embodiment, if the obtained Q factor is less than the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, Under the control of the processor 322 of FIG. 3B , operation 507 may branch to operation 515 .

In general, a coil such as an inductor may store energy from the outside. However, the stored energy is dissipated over time by the resistance component of the coil itself, and the concept introduced to define the degree of loss generated at this time is the Q factor. When an external object including a foreign object or an external object that is a foreign object is located on a wireless power transmission/reception path, a resonance curve may be changed and thus a Q factor may be changed. For example, the external electronic device including the foreign material may be the power receiving device 201 placed on the electronic device 101 together with the foreign material.

In one embodiment, in the case of an external object including a foreign material, the Q factor tends to decrease when the foreign material is located in the center of the coil. Alternatively, when an external object, which is a foreign substance, is located in the center of the coil, the Q factor tends to decrease.

In one embodiment, in the case of an external object including a foreign material, the Q factor tends to increase when the foreign material is located outside the coil. Alternatively, when an external object, which is a foreign substance, is located outside the coil, the Q factor tends to increase.

In one embodiment, when an external object, which is a foreign material, is located in the center of the transmission coil 321L (eg, the WPT coil), the measured Q factor may be smaller than the predetermined Q factor. Alternatively, in an external object including a foreign material, when the foreign material is located in the center of the transmitting coil 321L (eg, the WPT coil), the measured Q factor may be smaller than the determined Q factor.

In one embodiment, when the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil) are adjacent to each other, an external object, which is a foreign object, may come into contact with the transmitting coil 321L (eg, WPT coil). When located at the center of the receiving coil 311L (eg, WPT coil), the measured Q factor may be smaller than the determined Q factor. When the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil) are adjacent to each other, in an external object including foreign matter, the foreign material may be transmitted to the transmitting coil 321L (eg, WPT coil). When located at the center of the receiving coil 311L (eg, WPT coil), the measured Q factor may be smaller than the determined Q factor.

For example, the predetermined Q factor may be determined based on an external electronic device (eg, the power receiving device 201) including the receiving coil 311L (eg, the WPT coil).

According to an embodiment, the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B ) stores a memory (eg, the memory 130 ) in an external electronic device (eg, the power receiver (eg, the power receiver 203 )). 201)) may store predetermined Q factor information based on characteristics (eg, device type or coil characteristics).

In one embodiment, the obtained Q factor may be greater than the predetermined Q factor when an external object, which is a foreign material, is located on the periphery away from the center of the transmission coil 321L (eg, the WPT coil). Alternatively, in an external object including a foreign material, when the foreign material is located on the periphery away from the center of the transmitting coil 321L (eg, the WPT coil), the obtained Q factor may be greater than the predetermined Q factor.

In one embodiment, when the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil) are adjacent to each other, an external object, which is a foreign object, may contact the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil). The obtained Q factor may be greater than the predetermined Q factor when located on the outer edge spaced apart from the center of the receiving coil 311L (eg, the WPT coil) by a predetermined distance. Or, in the case of an external object including a foreign substance, it is obtained when the foreign substance is located on the outside by a predetermined distance from the center of the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil). The determined Q factor may be greater than the determined Q factor.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , in operation 509, the measured inductance at both ends of the WPT coil can be checked.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 509, the first ping signal may be transmitted again to check the inductance measured at both ends of the WPT coil.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , in operation 509, it is possible to check the inductance measured at both ends of the WPT coil based on the first ping signal transmitted in operation 501.

In an embodiment, a Q factor obtained when an external object, which is a foreign material, is present in the first area may be similar to a Q factor measured when the external object does not include the foreign material or when the external object is not a foreign material. For an external object including a foreign substance, a Q factor obtained when the foreign substance is present in the first region may be similar to a Q factor measured when the external object does not include the foreign substance or when the external object is not the foreign substance.

In one embodiment, the first area may correspond to an outer area of the transmitting coil 321L (eg, a WPT coil).

In one embodiment, when the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil) are adjacent to each other, the first region is the transmitting coil 321L (eg, WPT coil) and the receiving coil 321L (eg, WPT coil). It may correspond to an outer region spaced apart by a predetermined distance from the center of the coil 311L (eg, the WPT coil).

In various embodiments of the present disclosure, when an external object that is a foreign substance is present in the first region or when a foreign substance of an external object including a foreign substance is present in the first region, the inductance measured at both ends of the WPT coil as well as the Q factor is additionally measured The presence or absence of foreign matter can be detected more accurately.

In one embodiment, the inductance measured across the WPT coil may be the inductance measured when the transmitting coil 321L (WPT coil) and the receiving coil 311L (WPT coil) are adjacent to each other.

In various embodiments, the inductance measured across the WPT coil may be the inductance measured when the transmission coil 321L (WPT coil) and an external object are adjacent.

In general, the power of the first ping signal increases as it approaches a resonance point and decreases as it moves away from the resonance point. If the foreign matter is present in the outer region spaced apart by a predetermined distance from the center of the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil), the first ping signal is measured due to low power The measured inductance across the WPT coil may be less than the specified inductance.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 511, it may be determined whether the measured inductance is greater than or equal to a predetermined inductance. The measured inductance may be the measured inductance across the WPT coil.

In one embodiment, if the measured inductance is greater than or equal to a predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) sends the processor 120 (eg, FIG. 3B ) Under the control of the processor 322), operation 511 may branch to operation 513.

In one embodiment, if the measured inductance is less than the specified inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) sends the processor 120 (eg, FIG. 3B ). Under the control of the processor 322), operation 511 may branch to operation 519.

In one embodiment, if the measured inductance is greater than or equal to a predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) sends the processor 120 (eg, FIG. 3B ) Under the control of the processor 322), in operation 513, it is determined that the external object does not contain a foreign substance or the external object is not a foreign substance, and the function is performed. In operation 513, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), under the control of the processor 120 (eg, the processor 322 of FIG. 3B), Power may be transmitted to the power receiving device 201 through the transmitting coil 321L (eg, the WPT coil).

In various embodiments, if the measured inductance is equal to or greater than a predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) may send the processor 120 (eg, FIG. 3B Under the control of the processor 322), in operation 513, it is checked whether the external object responds, and if there is no response from the external object, it is determined that there is no power receiving device and power transmission is stopped.

In various embodiments, if the measured inductance is equal to or greater than a predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) may send the processor 120 (eg, FIG. 3B In operation 513, under the control of the processor 322 of the external object, it is checked whether the external object responds, and if there is a response from the external object, power can be transmitted to the power receiving device 201.

In one embodiment, if the measured inductance is less than the specified inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) sends the processor 120 (eg, FIG. 3B ). Under the control of the processor 322), in operation 519, it may be determined whether there is a response from the external object.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 519, it may be determined whether there is a response from the external object corresponding to the first ping signal. The response of the external object corresponding to the first ping signal may be the response of the external object confirmed in operation 503 .

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 519, it is possible to determine whether there is a response from the external object corresponding to the first ping signal by transmitting the first ping signal again.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 519, it may be determined whether there is a response from the external object based on the response of the external object corresponding to the first ping signal confirmed in operation 503.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , if there is a response from the external object, operation 519 can branch to operation 521.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , if there is no response from the external object, operation 519 can branch to operation 523.

In one embodiment, if there is no response from the external object, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) sends the processor 120 (eg, the processor of FIG. 3B). Under the control of (322)), in operation 523, it may be determined that an external object, which is a foreign substance, is present in the first area.

In one embodiment, if it is determined that there is a response from the external object, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), the processor 120 (eg, FIG. 3B) Under the control of the processor 322), in operation 521, it is determined that the external object is the power receiving device 201 and the function is performed by determining that the foreign object is in the first area.

In one embodiment, in operation 521, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) may perform an operation of lowering transmission power to a predetermined power or less as a function. there is.

In one embodiment, in operation 521, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) detects that an external object (eg, the power reception device 201) contains a foreign substance and If it is determined that there is, an operation of transmitting the location of the foreign object to the power receiving device 201 may be performed as a function.

When the location of the foreign substance is received from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 detects the presence of the foreign substance in response to the location of the foreign substance. A related graphical user interface may be displayed on the display 315 (eg, the display module 160 of FIG. 1 ).

Upon receiving the location of the foreign object from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B ), the power receiver 201 may control power reception.

When the location of the foreign object is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 generates heat in the power receiver 201 while receiving power. When this occurs and the heating mode is entered, power reception from the electronic device 101 may be blocked.

When the location of the foreign object is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 generates heat in the power receiver 201 while receiving power. When this occurs and the heating mode is entered, the electronic device 101 may request to stop power transmission.

When the location of the foreign substance is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 sends a notification about the foreign substance through a user interface (eg, a pop-up ( pop-up) may be displayed on the display 315 (eg, the display module 160 of FIG. 1).

When the location of the foreign object is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 outputs a notification about the foreign object as sound and/or vibration. In one embodiment, if the Q factor obtained in operation 507 is less than the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), the processor ( 120) (eg, the processor 322 of FIG. 3B), in operation 515, it may be determined that the foreign material is in the second area.

In various embodiments, if the obtained Q factor is less than the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) causes the processor 120 (eg, Under the control of the processor 322 of FIG. 3B , in operation 515 , it may be determined that the foreign material is present in the second area in the external object including the foreign material.

In various embodiments, if the Q factor obtained in operation 507 is less than the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, For example, under the control of the processor 322 of FIG. 3B , in operation 515 , it may be determined that an external object, which is a foreign substance, is in the second area. In one embodiment, the second area may be a center of the wireless power transmission path.

In various embodiments, the second area may correspond to the central area of the transmitting coil 321L.

In various embodiments, when the transmitting coil 321L and the receiving coil 311L are adjacent to each other, the second region is the center of the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil). can respond to

The embodiments of FIGS. 5A and 5B may detect an external object using the Q factor when the external object exists in the second area.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , in operation 517, power transmission may be stopped and the function may be performed.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ), in an embodiment, processor 120 (eg, processor 322 of FIG. 3B ) )), in operation 517, an operation of stopping power transmission and transmitting the location of the foreign object to the power receiving device 201 may be performed as a function.

Referring to operation 515, an external object that is a foreign substance may be present in the second area, or an external object including a foreign substance may be present in the second area. In this case, in the case of an external object including foreign matter, the external object may be the power receiving device 201 and the foreign material may be present in the second area. The electronic device 101 may perform an operation of transmitting the location of the foreign object to the power receiving device 201 as a function.

When the location of the foreign substance is received from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 detects the presence of the foreign substance in response to the location of the foreign substance. A related graphical user interface may be displayed on the display 315 (eg, the display module 160 of FIG. 1 ).

Upon receiving the location of the foreign object from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B ), the power receiver 201 may block power reception.

When the location of the foreign substance is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 sends a notification about the foreign substance through a user interface (eg, a pop-up ( pop-up) may be displayed on the display 315 (eg, the display module 160 of FIG. 1).

6A and 6B are flowcharts illustrating a method of detecting a foreign material in an electronic device 101 according to an embodiment of the present disclosure.

The foreign material detection method of FIGS. 6A and 6B may further include an operation of measuring inductance at both ends of the WPT coil by changing a frequency of the first ping signal, compared to the foreign material detection method of FIGS. 5A and 5B . In FIGS. 6A and 6B, descriptions overlapping those of FIGS. 5A and 5B may be omitted.

The electronic device 101 according to an embodiment may be an electronic device including the power transmission device 203 mentioned in FIGS. 2 and 3 .

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 601, a first ping signal may be transmitted to an external object.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 603, a response of the external object may be checked.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 603, a response of the external object corresponding to the first ping signal may be checked. For example, the response of the external object may be a signal strength packet.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 603, if there is a response from the external object corresponding to the first ping signal, it may be determined that the external object includes an external electronic device capable of receiving power (eg, the power receiving device 201). In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 603, if there is no response from the external object corresponding to the first ping signal, the external object includes an object that cannot receive power (eg, an external electronic device or foreign object that cannot receive power) It can be judged that For example, when the external object is an object that cannot receive power, the power transmission operation may be stopped.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , in operation 605, a Q factor may be obtained.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 605, the Q factor may be obtained based on the measured power, voltage, or current by measuring power, voltage, or current during transmission of the first ping signal or after transmission of the first ping signal.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 605, the power, voltage, or current of the transmitting coil 321L (eg, the WPT coil) is measured during transmission of the first ping signal or after transmission of the first ping signal, and the measured power, voltage, or current is measured. Based on this, the Q factor can be obtained.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 605, the waveform of the power, voltage or current of the transmitting coil 321L (eg, WPT coil) is measured during transmission of the first ping signal or after transmission of the first ping signal, and the measured power, voltage or A Q factor can be obtained based on the waveform of the current.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 607, it may be determined whether the obtained Q factor is greater than or equal to a predetermined Q factor.

In one embodiment, if the obtained Q factor is greater than or equal to the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, Under the control of the processor 322 of FIG. 3B , operation 607 may branch to operation 609 .

In one embodiment, if the obtained Q factor is less than the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), the processor 120 (eg, Under the control of the processor 322 of FIG. 3B , operation 607 may branch to operation 617 .

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 609, the second ping signal may be transmitted to the external object.

In one embodiment, the second ping signal may have a higher frequency than the first ping signal.

In one embodiment, the second ping signal may be a signal obtained by changing the frequency of the first ping signal.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 609, a second ping signal obtained by changing the frequency of the first ping signal to be greater than a predetermined frequency may be transmitted to an external object.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , in operation 611, it is possible to check the inductance measured at both ends of the WPT coil based on the second ping signal.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 611, the inductance measured at both ends of the WPT coil may be checked based on the second ping signal obtained by changing the frequency of the first ping signal to be greater than a predetermined frequency.

In general, the inductance measured across the WPT coil tends to decrease as the frequency of the transmitted signal increases.

In one embodiment, the inductance measured across the WPT coil may be the inductance measured when the transmitting coil 321L (eg, the WPT coil) and the receiving coil 311L (eg, the WPT coil) are adjacent to each other.

In various embodiments, the inductance measured across the WPT coil may be the inductance measured when the transmitting coil 321L (eg, the WPT coil) and an external object are adjacent to each other.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 613, it may be determined whether the measured inductance is greater than or equal to a predetermined inductance. The measured inductance may be the measured inductance across the WPT coil.

In one embodiment, if the measured inductance is greater than or equal to a predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) sends the processor 120 (eg, FIG. 3B ). Under the control of the processor 322), operation 613 may branch to operation 615.

In one embodiment, if the measured inductance is less than the specified inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) sends the processor 120 (eg, FIG. 3B ). Under the control of the processor 322), operation 613 may branch to operation 621.

In one embodiment, if the measured inductance is greater than or equal to a predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) sends the processor 120 (eg, FIG. 3B ). Under the control of the processor 322), in operation 615, it is determined that the external object does not contain a foreign substance or the external object is not a foreign substance, and the function is performed.

In various embodiments, if the measured inductance is equal to or greater than a predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) may send the processor 120 (eg, FIG. 3B Under the control of the processor 322), in operation 615, it is checked whether the external object responds, and if there is no response from the external object, it is determined that there is no power receiving device and power transmission is stopped.

In various embodiments, if the measured inductance is equal to or greater than a predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) may send the processor 120 (eg, FIG. 3B In operation 615, under the control of the processor 322 of the external object, it is checked whether the external object responds, and if there is a response from the external object, power can be transmitted to the power receiving device 201.

In one embodiment, if the measured inductance is less than the specified inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) sends the processor 120 (eg, FIG. 3B ). Under the control of the processor 322), in operation 621, it may be determined whether there is a response from the external object.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 621, it may be determined whether there is a response from the external object corresponding to the first ping signal. The response of the external object corresponding to the first ping signal may be the response of the external object confirmed in operation 603 .

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 621, it is possible to determine whether there is a response from the external object corresponding to the first ping signal by retransmitting the first ping signal.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 621, it may be determined whether there is a response from the external object based on the response of the external object corresponding to the first ping signal confirmed in operation 603.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , if there is a response from the external object, operation 621 can branch to operation 623.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , if there is no response from the external object, operation 621 can branch to operation 625.

In one embodiment, if there is no response from the external object, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) sends the processor 120 (eg, the processor of FIG. 3B). Under the control of (322)), in operation 625, it may be determined that an external object, which is a foreign substance, is present in the first area.

In one embodiment, the first area may correspond to an outer area of the transmitting coil 321L (eg, a WPT coil).

In one embodiment, when the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil) are adjacent to each other, the first region is the transmitting coil 321L (eg, WPT coil) and the receiving coil 321L (eg, WPT coil). It may correspond to an outer region spaced apart by a predetermined distance from the center of the coil 311L (eg, the WPT coil).

In one embodiment, if it is determined that there is a response from the external object, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), the processor 120 (eg, FIG. 3B) Under the control of the processor 322 of the controller, in operation 623 , the external object may be determined as the power receiving device 201 and the function may be performed by determining that the foreign object is present in the first area.

In one embodiment, in operation 623, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) may perform an operation of lowering transmission power to a predetermined power or less as a function. there is.

In one embodiment, in operation 623, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) detects that an external object (eg, the power reception device 201) contains a foreign substance and If it is determined that there is, an operation of transmitting the location of the foreign object to the power receiving device 201 may be performed as a function.

When the location of the foreign substance is received from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 detects the presence of the foreign substance in response to the location of the foreign substance. A related graphical user interface may be displayed on the display 315 (eg, the display module 160 of FIG. 1 ).

Upon receiving the location of the foreign object from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B ), the power receiver 201 may control power reception.

When the location of the foreign object is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 generates heat in the power receiver 201 while receiving power. When this occurs and the heating mode is entered, power reception from the electronic device 101 may be blocked.

When the location of the foreign object is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 generates heat in the power receiver 201 while receiving power. When this occurs and the heating mode is entered, the electronic device 101 may request to stop power transmission.

When the location of the foreign substance is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 sends a notification about the foreign substance through a user interface (eg, a pop-up ( pop-up) may be displayed on the display 315 (eg, the display module 160 of FIG. 1).

When the location of the foreign object is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 outputs a notification about the foreign object as sound and/or vibration. can do.

In one embodiment, in operation 607, if the obtained Q factor is less than the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), the processor 120 ( For example, in operation 617 under the control of the processor 322 of FIG. 3B , it may be determined that the foreign material is present in the second area.

In various embodiments, if the obtained Q factor is less than the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) causes the processor 120 (eg, Under the control of the processor 322 of FIG. 3B , in operation 617 , it may be determined that the foreign material is present in the second area in the external object including the foreign material.

In various embodiments, if the obtained Q factor is less than the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) causes the processor 120 (eg, Under the control of the processor 322 of FIG. 3B , in operation 617 , it may be determined that an external object, which is a foreign substance, is present in the second area.

In one embodiment, the second area may be a center of the wireless power transmission path.

In various embodiments, the second area may correspond to the center area of the transmitting coil 321L (eg, WPT coil).

In various embodiments, when the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil) are adjacent to each other, the second region is the transmitting coil 321L (eg, WPT coil) and the receiving coil 321L (eg, WPT coil). It may correspond to the center of the coil 311L (eg, WPT coil).

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , in operation 619, power transmission may be stopped and the function may be performed.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ), in an embodiment, processor 120 (eg, processor 322 of FIG. 3B ) )), an operation of stopping power transmission and transmitting the location of the foreign object to the power receiving device 201 may be performed as a function in operation 619 .

Referring to operation 617, an external object that is a foreign substance may be located in the second area, or an external object including a foreign material may be located in the second area. In this case, in the case of an external object including foreign matter, the external object may be the power receiving device 201 and the foreign material may be present in the second area. The electronic device 101 may perform an operation of transmitting the location of the foreign object to the power receiving device 201 as a function.

When the location of the foreign substance is received from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 detects the presence of the foreign substance in response to the location of the foreign substance. A related graphical user interface may be displayed on the display 315 (eg, the display module 160 of FIG. 1 ).

Upon receiving the location of the foreign object from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B ), the power receiver 201 may block power reception.

When the location of the foreign substance is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 sends a notification about the foreign substance through a user interface (eg, a pop-up ( pop-up) may be displayed on the display 315 (eg, the display module 160 of FIG. 1).

7A and 7B are flowcharts illustrating a method of detecting a foreign substance in an electronic device 101 according to an embodiment of the present disclosure.

Compared to the foreign material detection method of FIGS. 5A and 5B, the foreign matter detection method of FIGS. 7A and 7B measures the inductance at both ends of the WPT coil even when the obtained Q factor is less than the predetermined Q factor, and measures the foreign matter based on the measured inductance. An operation of determining presence/absence may be further included. In FIGS. 7A and 7B , descriptions overlapping those of FIGS. 5A , 5B , 6A or 6B may be omitted.

The electronic device 101 according to an embodiment may be an electronic device including the power transmission device 203 mentioned in FIGS. 2 and 3 .

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 701, a first ping signal may be transmitted to an external object.

In one embodiment, in operation 701, the electronic device 101 may receive a response signal to the first ping signal from the power receiving device 201 and perform an operation for power transmission.

In one embodiment, the first ping signal may have a predetermined frequency.

In various embodiments, the first ping signal may have a variable frequency of zero, the frequency of which may be changed.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 703, the response of the external object may be checked.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 703, a response of the external object corresponding to the first ping signal may be checked. For example, the response of the external object may be a signal strength packet.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 703, if there is a response from the external object corresponding to the first ping signal, it may be determined that the external object includes an external electronic device capable of receiving power (eg, the power receiving device 201). In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 703, if there is no response from the external object corresponding to the first ping signal, the external object includes an object that cannot receive power (eg, an external electronic device or foreign object that cannot receive power) It can be judged that For example, when the external object is an object that cannot receive power, the power transmission operation may be stopped.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 705, a Q factor may be obtained.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 705, the Q factor may be obtained based on the measured power, voltage, or current by measuring power, voltage, or current during transmission of the first ping signal or after transmission of the first ping signal.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 705, the power, voltage, or current of the transmitting coil 321L (eg, the WPT coil) is measured during transmission of the first ping signal or after transmission of the first ping signal, and the measured power, voltage, or current is measured. Based on this, the Q factor can be obtained.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 705, the waveform of the power, voltage or current of the transmitting coil 321L (eg, WPT coil) is measured during transmission of the first ping signal or after transmission of the first ping signal, and the measured power, voltage or A Q factor can be obtained based on the waveform of the current.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 707, it may be determined whether the obtained Q factor is greater than or equal to a predetermined Q factor.

In one embodiment, if the obtained Q factor is greater than or equal to the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, Under the control of the processor 322 of FIG. 3B , operation 707 may branch to operation 709 .

In one embodiment, if the obtained Q factor is less than the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) causes the processor 120 (eg, Under the control of the processor 322 of FIG. 3B , operation 707 may branch to operation 721 .

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 709, the first inductance measured at both ends of the WPT coil may be checked based on the first ping signal.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 709, the first ping signal may be transmitted again to check the first inductance measured at both ends of the WPT coil.

In an embodiment, the first inductance measured at both ends of the WPT coil may be an inductance measured when the transmitting coil 321L (eg, the WPT coil) and the receiving coil 311L (eg, the WPT coil) are adjacent to each other.

In various embodiments, the first inductance measured across the WPT coil may be the inductance measured when the transmission coil 321L (eg, the WPT coil) and an external object are adjacent to each other.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 711, it may be determined whether the measured first inductance is greater than or equal to a first predetermined inductance. The measured first inductance may be the inductance measured across the WPT coil.

In one embodiment, if the measured first inductance is equal to or greater than the first predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, For example, operation 711 may branch to operation 713 under the control of the processor 322 of FIG. 3B .

In one embodiment, if the measured first inductance is less than the first predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, For example, operation 711 may branch to operation 715 under the control of the processor 322 of FIG. 3B .

In one embodiment, if the measured first inductance is equal to or greater than the first predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, For example, under the control of the processor 322 of FIG. 3B , in operation 713 , it is determined that the external object does not contain a foreign substance or the external object is not a foreign substance, and the function is performed. In operation 713, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), under the control of the processor 120 (eg, the processor 322 of FIG. 3B), Power may be transmitted to the power receiving device 201 through the transmitting coil 321L (eg, the WPT coil).

In various embodiments, if the measured inductance is equal to or greater than a predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) may send the processor 120 (eg, FIG. 3B Under the control of the processor 322), in operation 713, it is checked whether the external object responds, and if there is no response from the external object, it is determined that there is no power receiving device and power transmission may be stopped.

In various embodiments, if the measured inductance is equal to or greater than a predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) may send the processor 120 (eg, FIG. 3B Under the control of the processor 322), in operation 713, whether or not the external object responds is checked, and if there is a response from the external object, power can be transmitted to the power receiving device 201.

In one embodiment, if the measured first inductance is less than the first predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, For example, in operation 715 under the control of the processor 322 of FIG. 3B , it may be determined whether there is a response from the external object.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 715, it may be determined whether there is a response from the external object corresponding to the first ping signal. The response of the external object corresponding to the first ping signal may be the response of the external object confirmed in operation 703 .

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 715, it is possible to determine whether there is a response from the external object corresponding to the first ping signal by transmitting the first ping signal again.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 715, it may be determined whether there is a response from the external object based on the response of the external object corresponding to the first ping signal confirmed in operation 703.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , if there is a response from the external object, operation 715 can branch to operation 717.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , if there is no response from the external object, operation 715 can branch to operation 719.

In one embodiment, if there is no response from the external object, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) sends the processor 120 (eg, the processor of FIG. 3B). Under the control of (322)), in operation 719, it is determined that an external object, which is a foreign object, is present in the first area, and the power transmission operation may be stopped.

In one embodiment, the first area may correspond to an outer area of the transmitting coil 321L (eg, a WPT coil).

In one embodiment, when the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil) are adjacent to each other, the first region is the transmitting coil 321L (eg, WPT coil) and the receiving coil 321L (eg, WPT coil). It may correspond to an outer region spaced apart by a predetermined distance from the center of the coil 311L (eg, the WPT coil).

In one embodiment, if it is determined that there is a response from the external object, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), the processor 120 (eg, FIG. 3B) Under the control of the processor 322), in operation 717, the external object may be determined as the power receiving device 201, and the function may be performed by determining that the foreign object is present in the first area.

In one embodiment, in operation 717, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) may perform an operation of lowering transmission power to a predetermined power or less as a function. there is.

In one embodiment, in operation 717, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) detects that an external object (eg, the power reception device 201) contains a foreign substance and If it is determined that there is, an operation of transmitting the location of the foreign object to the power receiving device 201 may be performed as a function.

When the location of the foreign substance is received from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 detects the presence of the foreign substance in response to the location of the foreign substance. A related graphical user interface may be displayed on the display 315 (eg, the display module 160 of FIG. 1 ).

Upon receiving the location of the foreign object from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B ), the power receiver 201 may control power reception.

When the location of the foreign object is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 generates heat in the power receiver 201 while receiving power. When this occurs and the heating mode is entered, power reception from the electronic device 101 may be blocked.

When the location of the foreign object is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 generates heat in the power receiver 201 while receiving power. When this occurs and the heating mode is entered, the electronic device 101 may request to stop power transmission.

When the location of the foreign substance is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 sends a notification about the foreign substance through a user interface (eg, a pop-up ( pop-up) may be displayed on the display 315 (eg, the display module 160 of FIG. 1).

When the location of the foreign object is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 outputs a notification about the foreign object as sound and/or vibration. can do.

In one embodiment, in operation 707, if the obtained Q factor is less than the predetermined Q factor, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), the processor 120 (eg For example, in operation 721 under the control of the processor 322 of FIG. 3B , the second inductance measured at both ends of the WPT coil based on the third ping signal may be checked.

In one embodiment, the first ping signal and the third ping signal may include different frequencies. A frequency of the first ping signal may be greater than a frequency of the third ping signal.

In one embodiment, the first ping signal and the third ping signal may have the same frequency.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 721, the third ping signal may be transmitted to the external object, and the second inductance measured at both ends of the WPT coil may be checked.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 723, it may be determined whether the measured second inductance is equal to or greater than the second predetermined inductance. The measured second inductance may be the inductance measured across the WPT coil.

The second predetermined inductance may be equal to the first predetermined inductance. In various embodiments, the second defined inductance may be different from the first defined inductance.

In one embodiment, if the measured second inductance is equal to or greater than the second predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, For example, operation 723 may branch to operation 725 under the control of the processor 322 of FIG. 3B .

In one embodiment, if the measured second inductance is less than the second predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, For example, operation 723 may branch to operation 727 under the control of the processor 322 of FIG. 3B .

In one embodiment, if the measured second inductance is equal to or greater than the second predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, For example, in operation 725 under the control of the processor 322 of FIG. 3B , a function may be performed based on whether the external object responds.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 725, it is possible to determine whether there is a response from the external object corresponding to the first ping signal by transmitting the first ping signal again.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 725, it may be determined whether there is a response from the external object based on the response of the external object corresponding to the first ping signal confirmed in operation 703.

In various embodiments, if the measured second inductance is equal to or greater than the second predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, For example, under the control of the processor 322 of FIG. 3B , in operation 725 , if there is a response from the external object, the external object may be determined as the power receiving device 201 and power may be transmitted to the external object.

In various embodiments, if the measured second inductance is equal to or greater than the second predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, For example, in operation 725 under the control of the processor 322 of FIG. 3B , if there is a response from the external object, it is determined that there is no foreign object and power is transmitted to the external object.

In various embodiments, if the measured second inductance is equal to or greater than the second predetermined inductance, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ), the processor 120 (eg, For example, in operation 725 under the control of the processor 322 of FIG. 3B, if there is no response from the external object, the power transfer operation may be stopped.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 727, the function may be performed by determining that the foreign matter is in the second area.

In one embodiment, the second area may be a center of the wireless power transmission path.

In various embodiments, the second area may correspond to the central area of the transmitting coil 321L.

In various embodiments, when the transmitting coil 321L and the receiving coil 311L are adjacent to each other, the second region is the center of the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil). can respond to

In one embodiment, in operation 727, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) may perform an operation to stop power transmission as a function.

In one embodiment, in operation 727, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) detects that an external object (eg, the power reception device 201) contains a foreign substance and If it is determined that there is, an operation of stopping power transmission and transmitting the location of the foreign object to the power receiving device 201 may be performed as a function.

When the location of the foreign substance is received from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 detects the presence of the foreign substance in response to the location of the foreign substance. A related graphical user interface may be displayed on the display 315 (eg, the display module 160 of FIG. 1 ).

Upon receiving the location of the foreign object from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B ), the power receiver 201 may block power reception.

When the location of the foreign substance is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 sends a notification about the foreign substance through a user interface (eg, a pop-up ( pop-up) may be displayed on the display 315 (eg, the display module 160 of FIG. 1).

When the location of the foreign object is transmitted from the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B), the power receiver 201 outputs a notification about the foreign object as sound and/or vibration. can do.

8 is a flowchart illustrating a method of detecting a foreign material in the electronic device 101 according to various embodiments of the present disclosure.

Compared to the foreign object detection methods mentioned in FIGS. 5A, 5B, 6A, 6B, 7A, and 7B, the external object detection method of FIG. When power loss occurs during power transmission, the power transmission device 203 may further include an operation of detecting a foreign substance.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , in operation 801, power may be transmitted to the power receiving device 201.

In one embodiment, the power receiving device 201 transmits from the electronic device 101 (eg, the power transmitting device 203 of FIGS. 2 and 3B ) in operation 801 under the control of the processor 312 . power can be received.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 803, it may be determined whether or not the power loss is greater than or equal to a predetermined value.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , Power loss may be determined based on the power transmitted in operation 803 and the information received from the power receiving device 201 . When the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B ) transmits power to the power receiver 201, the power receiver 201 determines the size of the received power. Information (eg, received power packet) may be transmitted to the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B). The electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) may determine the amount of power lost based on information about the amount of transmitted power and received power. The electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), under the control of the processor 120 (eg, the processor 322 of FIG. 3B), in operation 803, It may be determined whether or not the magnitude of the power loss is greater than or equal to a predetermined value. If the power loss is greater than or equal to the predetermined value, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), the processor 120 (eg, the processor 322 of FIG. 3B) ), operation 803 may branch to operation 805.

If the power loss is less than the predetermined value, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), the processor 120 (eg, the processor 322 of FIG. 3B) ), it is possible to branch from operation 803 to operation 801.

If the power loss is greater than or equal to the predetermined value, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), the processor 120 (eg, the processor 322 of FIG. 3B) ), in operation 805, a packet may be transmitted. A packet transmitted by the electronic device 101 may be a packet notifying that an operation for detecting an external object is performed.

In one embodiment, the power receiving device 201, in operation 807, under the control of the processor 312, receives a packet from the electronic device 101 (e.g., the power transmitting device 203 of FIGS. 2 and 3B). Upon receiving, a confirmation packet may be transmitted to the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B).

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 809, a user interface display related to charging may be maintained.

In operation 809, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) and the power reception device 201 operate as if they are maintaining power transmission and power reception. can be exchanged. When the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) and the power reception device 201 exchange promised packets, a user interface display related to charging may be maintained.

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , in operation 811, a ping step may be executed. In the ping step, the electronic device 101 may transmit a ping signal to the power receiver 201 .

In one embodiment, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 813, the status with the power receiving device 201 may be checked based on the ping signal and the function may be performed.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 813, it is possible to determine whether a foreign substance exists between the power receiving devices 201 based on the ping signal.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 813, an alignment state for power transmission with the power receiving device 201 may be checked based on the ping signal.

In various embodiments, in operation 813, when the electronic device 101 and the power receiving device 201 perform a fast charging operation, the electronic device 101 (eg, the power transmitting device of FIGS. 2 and 3B ( 203) may change the transmit power level to a normal charging operation (eg, 5 V charging operation) in operation 813 under the control of the processor 120 (eg, the processor 322 of FIG. 3B). there is.

In various embodiments, in operation 813, when the electronic device 101 and the power receiver 201 perform a general charging operation (eg, 5 V charging operation), the electronic device 101 (eg, The power transmission device 203 of FIGS. 2 and 3B may maintain the power transmission level in operation 813 under the control of the processor 120 (eg, the processor 322 of FIG. 3B ).

At least one foreign matter detection method described in FIGS. 5A, 5B, 6A, 6B, 7A, and 7B may be the same as operation 813 to determine whether a foreign material is present and to perform the function.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 813, if it is determined that there is no foreign matter, the power transmission operation may be maintained.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 813, when it is determined that there is no foreign matter, power may be transmitted by changing to a high-speed charging operation.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 813, if the power loss exceeds a predetermined value in the absence of foreign matter, it is determined that there is an alignment abnormality between the transmission coil 321L and the reception coil 311L between the electronic device 101 and the power reception device 201. can do. The electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B), under the control of the processor 120 (eg, the processor 322 of FIG. 3B), in operation 813, Alignment for power transmission may be requested from the power receiving device 201 . The power receiving device 201 may notify the user by displaying a user interface for an alignment request for power transmission on the display 315 or by outputting a sound.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). In operation 813, if it is determined that a foreign substance is present, power transmission may be stopped or a transmitted power level may be lowered.

In various embodiments, electronic device 101 (eg, power transmission device 203 of FIGS. 2 and 3B ) is under the control of processor 120 (eg, processor 322 of FIG. 3B ). , In operation 813, if it is determined that a foreign substance exists, power transmission may be stopped or a transmitted power level may be lowered, and information on the presence of a foreign substance may be notified to the user through at least one of sound, vibration, and visual interfaces.

9A to 9C are diagrams illustrating locations between coils and locations of foreign substances according to various embodiments of the present disclosure.

FIG. 9A is a diagram showing positions between coils when there is no foreign matter 905 thereon.

Referring to FIG. 9A , when the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil) are adjacent to each other, the center adjacent to the resonance point is referred to as a second region 920, and the second region 920 An area corresponding to an outer area spaced apart from the area 920 by a predetermined distance may be referred to as a first area 910 .

In one embodiment, the first area 910 may be a periphery of a wireless power transmission path. The first area 910 may correspond to an outer area of the transmitting coil 321L (eg, a WPT coil). The first area 910 may correspond to an outer area spaced apart from the center of the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil) by a predetermined distance.

In one embodiment, the second region 920 may be a central portion of a wireless power transmission path. The second area 920 may correspond to a central area of the transmission coil 321L (eg, a WPT coil). For example, the second region 1020 may be a position corresponding to an inner diameter of the transmission coil 321L. The second region 920 may correspond to central portions of the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil).

FIG. 9B is a diagram illustrating a position between coils when a foreign material 905 is present in the second region 920 .

Referring to FIG. 9B, when a foreign substance is present in the second area 920, which is the center of the wireless power transmission path, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) measures The Q factor may be smaller than when there is no foreign matter.

FIG. 9C is a diagram illustrating a position between coils when a foreign material 905 is present in the first region 910 .

Referring to FIG. 9C , when a foreign substance exists in the first area 910, which is the center of the wireless power transmission path, the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) measures The Q factor may be larger than when there is no foreign matter.

10 is a graph in which Q factors are measured according to the presence and location of foreign substances according to various embodiments of the present disclosure.

In FIG. 10 , 1001 is a predetermined Q factor and may indicate a threshold value. When foreign matter exists between the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil), the electronic device 101 (eg, the power transmission device of FIGS. 2 and 3B ( 203) may determine the presence and location of the foreign matter based on the determined Q factor 1001 .

Graphs 1003 and 1005 are graphs showing the Q factor measured based on the location of the foreign material when a foreign material is located between the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil). am.

Graphs 1007 and 1009 are graphs showing Q factors when there is no foreign matter between the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil).

Referring to the 1003 graph and the 1005 graph, when the foreign matter is located in the central area A of the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil), the Q factor is determined by the Q factor ( 1001) can be smaller. The electronic device 101 (for example, the power transmission device 203 of FIGS. 2 and 3B ) determines that the foreign material is located in the central area A when the measured Q factor is smaller than the predetermined Q factor 1001 . can

Referring to graphs 1003 and 1005, when foreign matter is located in the area B surrounding the transmitting coil 321L and the receiving coil 311L (eg, WPT coil), the Q factor may be greater than the predetermined Q factor 1001. . The electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) may determine that the foreign material is located in the peripheral area B when the measured Q factor is greater than the predetermined Q factor 1001 . there is.

11 is a graph in which inductance is measured at both ends of a WPT coil according to the presence and location of foreign substances according to various embodiments of the present disclosure.

In FIG. 11 , the first inductance 1101 is a predetermined inductance and may indicate a threshold value. When foreign matter exists between the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil), the electronic device 101 (eg, the power transmission device of FIGS. 2 and 3B ( 203) may determine the existence and location of the foreign matter based on the first inductance 1101 .

Graphs 1103 and 1105 show the inductance at both ends of the WPT coil measured based on the location of the foreign matter when there is a foreign matter between the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil). It is a graph that represents

Graphs 1107 and 1109 are graphs showing inductance measured at both ends of the WPT coil when there is no foreign matter between the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil).

Referring to the 1103 graph and the 1105 graph, if the foreign matter is located in the central area (A) and the peripheral area (B) of the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil), WPT The inductance measured across the coil may be smaller than the first inductance 1101 . The electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ) may determine that a foreign substance is present when the inductance measured at both ends of the WPT coil is smaller than the first inductance 1101 .

12 is a graph in which inductance is measured at both ends of a WPT coil according to the presence and location of foreign substances according to various embodiments of the present disclosure.

11 shows that inductance can approach the first inductance 1101 at both ends of the WPT coil when a foreign material is located in the peripheral region (B). FIG. 12 shows that the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) generates a second ping signal having a higher frequency band than the first ping signal to measure inductance at both ends of the WPT coil. It shows the case of measuring the inductance at both ends of the WPT coil using As the frequency band increases, the inductance across the WPT coil can be reduced.

When foreign matter exists between the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil), the electronic device 101 (eg, the power transmission device of FIGS. 2 and 3B ( 203)) may determine the presence and location of foreign matter based on the first inductance 1101 and the second inductance 1201 . The second inductance 1201 may have a smaller inductance value than the first inductance 1101 .

Graphs 1203 and 1205 are graphs showing inductance at both ends of the WPT coil when a foreign substance exists between the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil).

Graphs 1207 and 1209 are graphs showing inductance at both ends of the WPT coil when there is no foreign matter between the transmitting coil 321L (eg, WPT coil) and the receiving coil 311L (eg, WPT coil).

Referring to the 1203 graph and the 1205 graph, when the foreign matter is located in the central region (A) and the peripheral region (B) of the transmitting coil 321L and the receiving coil 311L, the inductance at both ends of the WPT coil is first inductance 1101 and It may be smaller than the second inductance 1201. The electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) determines that the foreign matter is present when the inductance at both ends of the measured WPT coil is smaller than the first inductance 1101 and the second inductance 1201. can be judged to exist.

In one embodiment, in the electronic device 101 capable of transmitting and receiving wireless power (eg, the power transmission device 203 of FIGS. 2 and 3B), a wireless power transfer (WPT) coil; and a processor 120 (eg, the processor 322 of FIG. 3B) operatively coupled with the WPT coil (eg, the transmit coil 321L), wherein the processor 120 (eg, the processor of FIG. 3B ( 322)) controls to transmit the first ping signal to an external object through the WPT coil (eg, the transmitting coil 321L), and generates a current or voltage waveform measured during or after transmission of the first ping signal check, and acquire a Q factor based on the identified waveform, and if the obtained Q factor is less than a predetermined Q factor, the external object is or contains a foreign object, and the WPT coil (e.g., transmission The power transmission operation is controlled by determining that the coil 321L) is located at the center, and if the obtained Q factor is greater than or equal to the predetermined Q factor, the second ping signal is transmitted to the WPT coil (eg, the transmitting coil 321L) Transmits to the external object through, checks the current or voltage waveform during or after transmission of the second ping signal, and both ends of the WPT coil (eg, the transmitting coil 321L) based on the checked waveform Check the inductance measured in , and based on the measured inductance, it is determined that the external object is foreign matter or contains foreign matter and is located around the WPT coil (eg, the transmission coil 321L), and power transmission operation is performed. can control.

In one embodiment, the processor 120 (eg, the processor 322 of FIG. 3B ) determines that the external object is not a foreign substance or does not contain a foreign substance when the measured inductance is greater than or equal to a predetermined inductance, and performs a power transmission operation. can be controlled to maintain

In one embodiment, the second ping signal may have a higher frequency band than the first ping signal.

In one embodiment, the processor 120 (eg, the processor 322 of FIG. 3B ) determines that the external object is the WPT coil (eg, the transmitting coil 321L) if the obtained Q factor is greater than or equal to the predetermined Q factor. ), and measures the first inductance measured at both ends of the WPT coil (eg, the transmission coil 321L) based on the second ping signal, and the measured first inductance is 1 If the inductance is less than the predetermined inductance, the power transmission operation is controlled by determining that the external object contains a foreign substance or that the external object is a foreign substance and is located around the WPT coil (eg, the transmitting coil 321L). can do.

In one embodiment, the processor 120 (eg, the processor 322 of FIG. 3B ) determines that, if the obtained Q factor is less than the predetermined Q factor, the external object includes a foreign substance or the external object contains a foreign substance. It is determined that it is located at the center of the WPT coil (eg, the transmission coil 321L), and the power transmission operation can be controlled.

In one embodiment, the processor 120 (eg, the processor 322 of FIG. 3B ) may transmit power to the external electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B ) during a power transfer operation. If it is determined that the loss is greater than or equal to a predetermined value, a ping step is performed, a charging user interface display is maintained during the ping step, and when the power transfer operation is a fast charging operation, the fast charging operation is used as a normal charging operation. can be controlled with

In one embodiment, in the electronic device 101 capable of transmitting and receiving wireless power (eg, the power transmission device 203 of FIGS. 2 and 3B), a wireless power transfer (WPT) coil; and a processor 120 (eg, the processor 322 of FIG. 3B) operatively coupled with the WPT coil (eg, the transmit coil 321L), wherein the processor 120 (eg, the processor of FIG. 3B ( 322) transmits the first ping signal to an external object through the WPT coil (eg, the transmitting coil 321L), checks a current or voltage waveform during or after transmission of the first ping signal, and checks the Acquiring a Q factor based on the determined waveform, measuring inductance at both ends of the WPT coil (eg, the transmitting coil 321L) based on the identified waveform, and measuring the inductance at both ends of the WPT coil (eg, the transmitting coil 321L), the identified Q factor is greater than or equal to a predetermined Q factor, If the measured inductance is less than the predetermined inductance, it is determined that the external object is or contains foreign matter and is located around the WPT coil (eg, the transmission coil 321L), and power transmission operation can be controlled.

In one embodiment, the processor 120 (eg, the processor 322 of FIG. 3B ) determines that the external object is foreign matter when the checked Q factor is greater than or equal to a predetermined Q factor and the measured inductance is greater than or equal to a predetermined inductance. It is determined that the WPT coil (eg, the transmission coil 321L) is located around the WPT coil (eg, the transmission coil 321L), and the power transmission operation can be controlled.

In one embodiment, the processor 120 (eg, the processor 322 of FIG. 3B ) determines that the external object is or includes a foreign material when the checked Q factor is less than a predetermined Q factor, and the WPT coil (eg, the processor 322 of FIG. 3B ) , it is determined that it is located at the center of the transmission coil 321L), and the power transmission operation can be controlled.

In one embodiment, the processor 120 (eg, the processor 322 of FIG. 3B ) determines that, if the measured inductance is less than a predetermined inductance, the external object is or contains a foreign material, and the WPT coil (eg, transmission The power transmission operation can be controlled by determining that the coil 321L is located around the coil 321L.

In one embodiment, a method for detecting a foreign object of an electronic device 101 capable of transmitting and receiving wireless power using a wireless power transfer (WPT) coil (eg, the power transmission device 203 of FIGS. 2 and 3B) is a first method. Transmitting a ping signal to an external object through the WPT coil (eg, the transmitting coil 321L); checking a waveform of current or voltage measured during or after transmission of the first ping signal; acquiring a Q factor based on the identified waveform; If the obtained Q factor is less than the predetermined Q factor, it is determined that the external object is or includes a foreign object and is located at the center of the WPT coil (eg, the transmission coil 321L), and power transmission operation is performed. operation to control; transmitting a second ping signal to the external object through the WPT coil (eg, the transmitting coil 321L) when the obtained Q factor is greater than or equal to the predetermined Q factor; checking a current or voltage waveform during or after transmission of the second ping signal; Checking inductance measured at both ends of the WPT coil (eg, the transmitting coil 321L) based on the checked waveform; and controlling a power transmission operation based on the measured inductance by determining that the external object is or includes a foreign substance and is located around the WPT coil (eg, the transmission coil 321L). can

In one embodiment, the foreign matter detection method of the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B) capable of transmitting and receiving wireless power using a wireless power transfer (WPT) coil is the measurement When the determined inductance is equal to or greater than the predetermined inductance, an operation of determining that the external object is not or does not include a foreign material and controlling the power transmission operation to be maintained may be included.

In one embodiment, the foreign matter detection method of the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) capable of transmitting and receiving wireless power using a WPT (wireless power transfer) coil is the acquisition determining that the external object is located around the WPT coil (eg, the transmitting coil 321L) if the Q factor obtained is equal to or greater than the predetermined Q factor; measuring a first inductance measured at both ends of the WPT coil (eg, the transmitting coil 321L) based on the second ping signal; And if the measured first inductance is less than the first predetermined inductance, it is determined that the external object contains a foreign substance or the external object is a foreign substance and is located around the WPT coil (eg, the transmission coil 321L) It may include an operation of controlling the power transmission operation by determining that it is.

In one embodiment, the foreign matter detection method of the electronic device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B) capable of transmitting and receiving wireless power using a WPT (wireless power transfer) coil is the acquisition determining that the external object is located at the center of the WPT coil (eg, the transmission coil 321L) if the Q factor obtained is less than the predetermined Q factor; measuring a second inductance measured at both ends of the WPT coil (eg, the transmitting coil 321L) based on the first ping signal; And if the measured second inductance is less than the second predetermined inductance, it is determined that the external object contains a foreign substance or the external object is a foreign substance and is located at the center of the WPT coil (eg, the transmission coil 321L). It may include an operation of controlling the power transmission operation by determining that it is.

In one embodiment, a method for detecting a foreign object of an electronic device 101 capable of transmitting and receiving wireless power using a wireless power transfer (WPT) coil (eg, the power transmission device 203 of FIGS. 2 and 3B) is an external electronic device. performing a ping step when it is determined that power loss is greater than or equal to a predetermined value during a power transmission operation with the device 101 (eg, the power transmission device 203 of FIGS. 2 and 3B ); maintaining a user interface display related to charging while performing the pinging step; and controlling the fast charging operation as a general charging operation when the power transmission operation is a fast charging operation.

In one embodiment, in the foreign matter detection method of the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B) capable of transmitting and receiving wireless power using a wireless power transfer (WPT) coil, transmitting a first ping signal to an external object through the WPT coil (eg, the transmitting coil 321L); checking a current or voltage waveform during or after transmission of the first ping signal; obtaining a Q factor based on the identified waveform; measuring inductance at both ends of the WPT coil (eg, the transmitting coil 321L) based on the identified waveform; and if the checked Q factor is greater than or equal to the predetermined Q factor and the measured inductance is less than the predetermined inductance, the external object is or contains a foreign material and is located around the WPT coil (eg, the transmission coil 321L). It may include an operation of controlling the power transmission operation by determining that it is.

In one embodiment, the foreign matter detection method of the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B) capable of transmitting and receiving wireless power using a wireless power transfer (WPT) coil is the confirmation If the measured Q factor is greater than or equal to the predetermined Q factor and the measured inductance is greater than or equal to the predetermined inductance, it is determined that the external object is not a foreign substance or does not contain a foreign substance, and the WPT coil (eg, the transmitting coil 321L) It may include an operation of controlling the power transmission operation by determining that it is located in the periphery.

In one embodiment, the foreign matter detection method of the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B) capable of transmitting and receiving wireless power using a wireless power transfer (WPT) coil is the confirmation If the determined Q factor is less than the predetermined Q factor, controlling the power transmission operation by determining that the external object is or contains a foreign material and is located at the center of the WPT coil (eg, the transmission coil 321L). can do.

In one embodiment, the foreign matter detection method of the electronic device 101 (eg, the power transmitter 203 of FIGS. 2 and 3B) capable of transmitting and receiving wireless power using a wireless power transfer (WPT) coil is the confirmation If the measured Q factor is less than the predetermined Q factor and the measured inductance is less than the predetermined inductance, the external object is or contains a foreign material and is located around the WPT coil (eg, the transmission coil 321L). It may include an operation of determining and controlling a power transmission operation.

Electronic devices according to various embodiments disclosed in this document may be devices of various types. The electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance. An electronic device according to an embodiment of the present document is not limited to the aforementioned devices.

Various embodiments of this document and terms used therein are not intended to limit the technical features described in this document 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, like reference numbers may be used for like or related elements. The singular form of a noun corresponding to an item may include one item or a plurality of items, unless the relevant context clearly dictates otherwise. In this document, "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 "A Each of the phrases such as "at least one of , B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof. Terms such as "first", "second", or "first" or "secondary" may simply be used to distinguish a given component from other corresponding components, and may be used to refer to a given component in another aspect (eg, importance or order) is not limited. A (e.g., first) component is said to be "coupled" or "connected" to another (e.g., second) component, with or without the terms "functionally" or "communicatively." When mentioned, it means that the certain component may be connected to the other component directly (eg by wire), wirelessly, or through a third component.

The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and is interchangeable with terms such as, for example, logic, logical blocks, parts, or circuits. can be used as A module may be an integrally constructed component or a minimal unit of components or a portion thereof that performs one or more functions. For example, according to one embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

Various embodiments of this document provide one or more instructions stored in a storage medium (eg, internal memory 136 or external memory 138) readable by a machine (eg, electronic device 101). It may be implemented as software (eg, the program 140) including them. For example, a processor (eg, the processor 120 ) of a device (eg, the electronic device 101 ) may call at least one command among one or more instructions stored from a storage medium and execute it. This enables the device to be operated to perform at least one function according to the at least one command invoked. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' only means that the storage medium is a tangible device and does not contain a signal (e.g. electromagnetic wave), and this term refers to the case where data is stored semi-permanently in the storage medium. It does not discriminate when it is temporarily stored.

According to one embodiment, the method according to various embodiments disclosed in this document may be included and provided in a computer program product. Computer program products may be traded between sellers and buyers as commodities. A computer program product is distributed in the form of a device-readable storage medium (eg compact disc read only memory (CD-ROM)), or through an application store (eg Play Store ^TM ) or on two user devices ( It can be distributed (eg downloaded or uploaded) online, directly between smart phones. In the case of online distribution, at least part of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium such as a manufacturer's server, an application store server, or a relay server's memory.

According to various embodiments, each component (eg, module or program) of the above-described components may include a single object or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. there is. According to various embodiments, one or more components or operations among the aforementioned corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by a corresponding component of the plurality of components prior to the integration. . According to various embodiments, the actions performed by a module, program, or other component are executed sequentially, in parallel, iteratively, or heuristically, or one or more of the actions are executed in a different order, or omitted. or one or more other actions may be added.

Claims (20)

In an electronic device capable of transmitting and receiving wireless power,
wireless power transfer (WPT) coils; and
A processor operatively connected with the WPT coil;
The processor
Control to transmit a first ping signal to an external object through the WPT coil;
Checking a waveform of current or voltage measured during or after transmission of the first ping signal;
Obtaining a Q factor based on the identified waveform;
If the obtained Q factor is less than a predetermined Q factor, it is determined that the external object is or contains a foreign object and is located in the center of the WPT coil to control a power transmission operation;
If the obtained Q factor is greater than or equal to the predetermined Q factor, transmitting a second ping signal to the external object through the WPT coil;
Checking a current or voltage waveform during or after transmission of the second ping signal;
Check the inductance measured at both ends of the WPT coil based on the identified waveform,
Based on the measured inductance, the electronic device determines that the external object is or includes a foreign substance and is located around the WPT coil and controls a power transmission operation. According to claim 1,
The processor
If the measured inductance is greater than or equal to the predetermined inductance, the electronic device determines that the external object is not foreign or does not contain the foreign substance and controls to maintain the power transmission operation. According to claim 1,
The second ping signal is
An electronic device having a higher frequency band than the first ping signal. According to claim 1,
The processor
If the obtained Q factor is greater than or equal to the predetermined Q factor, it is estimated that the external object is located around the WPT coil;
Measuring a first inductance measured at both ends of the WPT coil based on the second ping signal;
If the measured first inductance is less than the first predetermined inductance, the external object contains a foreign substance, or determines that the external object is a foreign substance and is located around the WPT coil to control the power transmission operation electronic device. According to claim 1,
The processor
If the obtained Q factor is less than the predetermined Q factor,
The electronic device for controlling the power transmission operation by determining that the external object includes a foreign substance or that the external object is a foreign substance and is located in the center of the WPT coil. According to claim 1,
The processor
If it is determined that the power loss is greater than or equal to a predetermined value during a power transmission operation with an external electronic device, a ping step is performed;
Maintaining a user interface display related to charging during the pinging step;
When the power transfer operation is a fast charging operation, the electronic device controls the fast charging operation as a general charging operation. In an electronic device capable of transmitting and receiving wireless power,
wireless power transfer (WPT) coils; and
A processor operatively connected with the WPT coil;
The processor
Transmitting a first ping signal to an external object through the WPT coil;
Checking a current or voltage waveform during or after transmission of the first ping signal;
Obtaining a Q factor based on the identified waveform;
Based on the identified waveform, inductance is measured at both ends of the WPT coil,
If the checked Q factor is greater than or equal to the predetermined Q factor and the measured inductance is less than the predetermined inductance, determining that the external object is or contains a foreign material and is located around the WPT coil to control power transmission operation electronic device. According to claim 7,
The processor
If the checked Q factor is greater than or equal to the predetermined Q factor and the measured inductance is greater than or equal to the predetermined inductance, it is determined that the external object is not a foreign substance or does not contain a foreign substance, and it is determined that the external object is located around the WPT coil, An electronic device that controls power transmission operation. According to claim 7,
The processor
If the checked Q factor is less than the predetermined Q factor, the electronic device controls the power transmission operation by determining that the external object is or contains a foreign material and is located in the center of the WPT coil. According to claim 7,
The processor
If the measured inductance is less than the predetermined inductance, the electronic device controls the power transmission operation by determining that the external object is or contains a foreign substance and is located around the WPT coil. In the foreign matter detection method of an electronic device capable of transmitting and receiving wireless power using a wireless power transfer (WPT) coil,
Transmitting a first ping signal to an external object through the WPT coil;
checking a waveform of current or voltage measured during or after transmission of the first ping signal;
obtaining a Q factor based on the identified waveform;
controlling a power transmission operation by determining that the external object is or includes a foreign object and is located at the center of the WPT coil when the obtained Q factor is less than a predetermined Q factor;
transmitting a second ping signal to the external object through the WPT coil when the obtained Q factor is greater than or equal to the predetermined Q factor;
checking a current or voltage waveform during or after transmission of the second ping signal;
Checking inductance measured at both ends of the WPT coil based on the checked waveform; and
Based on the measured inductance, determining that the external object is or includes a foreign substance and is located around the WPT coil and controls a power transmission operation. According to claim 11,
and if the measured inductance is greater than or equal to a predetermined inductance, determining that the external object is not or does not contain a foreign substance and controlling the power transmission operation to be maintained. According to claim 11,
The second ping signal is
A method in which a frequency band is higher than that of the first ping signal. According to claim 11,
determining that the external object is located around the WPT coil when the obtained Q factor is greater than or equal to the predetermined Q factor;
measuring a first inductance measured at both ends of the WPT coil based on the second ping signal; and
If the measured first inductance is less than the first predetermined inductance, the external object contains a foreign substance, or determines that the external object is a foreign substance and is located around the WPT coil to control the power transmission operation How to include action. According to claim 11,
if the obtained Q factor is less than the predetermined Q factor, determining that the external object is located at the center of the WPT coil;
measuring a second inductance measured at both ends of the WPT coil based on the first ping signal; and
If the measured second inductance is less than the second predetermined inductance, the external object contains a foreign substance, or determines that the external object is a foreign substance and is located in the center of the WPT coil to control the power transmission operation How to include action. According to claim 11,
performing a ping step when it is determined that power loss is greater than or equal to a predetermined value during a power transmission operation with an external electronic device;
maintaining a user interface display related to charging while performing the pinging step; and
and controlling the fast charging operation as a normal charging operation when the power transfer operation is a fast charging operation. In the foreign matter detection method of an electronic device capable of transmitting and receiving wireless power using a wireless power transfer (WPT) coil,
Transmitting a first ping signal to an external object through the WPT coil;
checking a current or voltage waveform during or after transmission of the first ping signal;
obtaining a Q factor based on the identified waveform;
measuring inductance at both ends of the WPT coil based on the identified waveform; and
If the checked Q factor is greater than or equal to the predetermined Q factor and the measured inductance is less than the predetermined inductance, determining that the external object is or contains a foreign material and is located around the WPT coil to control power transmission operation How to include action. According to claim 17,
If the checked Q factor is greater than or equal to the predetermined Q factor and the measured inductance is greater than or equal to the predetermined inductance, it is determined that the external object is not a foreign substance or does not contain a foreign substance, and it is determined that the external object is located around the WPT coil, A method comprising controlling a power transmission operation. According to claim 17,
and controlling a power transmission operation by determining that the external object is or contains a foreign substance and is located at the center of the WPT coil when the checked Q factor is less than the predetermined Q factor. According to claim 19,
If the checked Q factor is less than the predetermined Q factor and the measured inductance is less than the predetermined inductance, it is determined that the external object is or contains a foreign material and is located around the WPT coil, and power transmission operation is controlled. How to include the action of doing.

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