Patent Publication Number: US-2021184507-A1

Title: Wireless power transmitting device, electronic device for wirelessly receiving power and operation method thereof

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 15/950,828, filed on Apr. 11, 2018, which claims priority under 35 U.S.C. § 119 to U.S. Provisional Patent Application No. 62/484,473, filed on Apr. 12, 2017 in the United States Patent and Trademark Office and Korean Patent Application No. 10-2017-0156739, filed on Nov. 22, 2017 in the Korean Intellectual Property Office, the disclosures of which are incorporated by reference herein in their entireties. 
    
    
     BACKGROUND 
     1. Field 
     The disclosure relates to a wireless power transmitting device that wirelessly transmits power, an electronic device for wirelessly receiving power, and an operation method thereof. 
     2. Description of Related Art 
     Digital mobile communication devices have become a necessity for most people who live in the contemporary society. Customers want to be provided with various high-quality services anywhere at any time. In addition, recently, various sensors, appliances, communication devices etc. that are used in daily life are being integrated into a network with the advent of Internet of things (IoT) technology. A wireless power transmission system makes it possible to operate these various sensors more effectively. 
     Magnetic induction, magnetic resonance, and electromagnetic wave schemes are representative of methods of wireless power transmission. The magnetic induction or magnetic resonance method is advantageous in charging electronic devices relatively close to a wireless power transmitting device. The electromagnetic wave scheme is more advantageous in transmitting power to a distance about several meters, as compared with the magnetic induction or magnetic resonance method. The electromagnetic wave scheme is mainly used for remote power transmission and through this method, the transmitter can locate the exact location of a power receiver at a relatively long distance and transmit power more efficiently. 
     SUMMARY 
     One or more example embodiments provide a device and a method for transmitting and receiving power with relatively high efficiency even when the distance between a wireless power transmitting device and an electronic device is relatively long. When there is a human body between a wireless power transmitting device and an electronic device, there is a possibility that the human body may be exposed to a harmful magnetic field or electric field. When a wireless power transmitting device additionally transmits communication signals such as media data other than power, the performance of the transmission of the media data may be negatively affected by an obstacle. 
     In accordance with an aspect of the disclosure, a wireless power transmitting device, an electronic device, and an operation method thereof may be provided to estimate whether there is an obstacle between a wireless power transmitting device and an electronic device and may perform an operation corresponding to the estimated result. 
     In accordance with an aspect of the disclosure, a wireless power transmitting device may include: a power transmission circuit and a processor. The processor may be configured to control the power transmission circuit to wirelessly transmit power to a first area around the wireless power transmitting device, perform a predetermined first operation when an obstacle is detected in a second area around the first section, and perform a predetermined second operation when it is detected that the obstacle has entered the first area. 
     In accordance with an aspect of the disclosure, a method of operating a wireless power transmitting device may include: wirelessly transmitting power to a first area around the wireless power transmitting device; performing a predetermined first operation in response to an obstacle being detected in a second area around the first area; and performing a predetermined second operation in response to detecting the obstacle entering the first area. 
     In accordance with an aspect of the disclosure, a wireless power transmitting device, an electronic device, and an operation method thereof may be provided where it may be estimated whether there is an obstacle between a wireless power transmitting device and an electronic device and an operation corresponding to the estimated result may be performed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features, and advantages of the present disclosure will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1A  is a block diagram of a wireless power transmitting device and an electronic device according to an embodiment; 
         FIG. 1B  is a conceptual diagram of a set-top box and a TV according to an embodiment; 
         FIG. 2  is a conceptual diagram illustrating a process where an object enters between a wireless power transmitting device and an electronic device according to an embodiment; 
         FIG. 3  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment; 
         FIG. 4A  is a block diagram of a wireless power transmitting device and an electronic device according to an embodiment; 
         FIG. 4B  is a block diagram of a wireless power transmitting device, an electronic device, and a sensor according to an embodiment; 
         FIG. 4C  is a block diagram of a wireless power transmitting device and an electronic device according to an embodiment; 
         FIG. 4D  is a block diagram of a power transmission circuit and a power reception circuit according to an induction scheme or a resonance method according to an embodiment; 
         FIG. 4E  is a block diagram of a power transmission circuit and a power reception circuit according to an electromagnetic wave scheme according to an embodiment; 
         FIG. 5  is a conceptual diagram of a wireless power transmitting device according to an embodiment; 
         FIG. 6  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment; 
         FIG. 7  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment; 
         FIG. 8  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment; 
         FIG. 9  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment; 
         FIG. 10  is a timing diagram illustrating a method of operating a wireless power transmitting device; 
         FIG. 11  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment; 
         FIG. 12  is a diagram illustrating changing power transmission paths using a plurality of coils according to an embodiment; 
         FIG. 13  is a diagram illustrating changing power transmission paths using a plurality of patch antennas according to an embodiment; 
         FIG. 14  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment; 
         FIG. 15  is a diagram illustrating a surrounding section divided in a plurality of detection sections according to an embodiment; 
         FIG. 16A  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment; 
         FIG. 16B  is a diagram illustrating division of a first section and a second section according to an embodiment; 
         FIG. 17  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment; 
         FIG. 18  is a diagram illustrating a TV, a wireless power transmitting device, and a media data transmitting device according to an embodiment; 
         FIG. 19  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment; 
         FIG. 20  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment; 
         FIG. 21  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment; and 
         FIG. 22  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to example embodiments, with reference to the accompanying drawings. The example embodiments and the terms used therein are not intended to limit the technology disclosed herein to specific forms, and should be understood to include various modifications, equivalents, and/or alternatives to the corresponding example embodiments. In describing the drawings, identical or similar reference numerals may be used to designate similar constituent elements. A singular expression may include a plural expression, and vice versa, unless they are definitely different in a context. As used herein, singular forms may include plural forms as well unless the context clearly indicates otherwise. The expression “first,” “a second,” “the first,” or “the second” used in various embodiments may use various components regardless of the order and/or the importance without limiting the components. When an element (e.g., first element) is referred to as being “(functionally or communicatively) connected,” or “coupled” to another element (second element), the element may be connected directly to the another element or connected to the another element through yet another element (e.g., third element). 
     The expression “configured to” as used in various embodiments may be interchangeably used with, for example, “suitable for,” “having the capacity to,” “designed to,” “adapted to,” “made to,” or “capable of” in terms of hardware or software, according to circumstances. Alternatively, in some situations, the expression “device configured to” may mean that the device, together with other devices or components, “is able to.” For example, the phrase “processor adapted (or configured) to perform A, B, and C” may mean a dedicated processor (e.g., embedded processor) only for performing the corresponding operations or a generic-purpose processor (e.g., central processing unit (CPU) or application processor (AP)) that can perform the corresponding operations by executing one or more software programs stored in a memory device. 
     A wireless power transmission device or an electronic device according to an embodiment may include at least one of, for example, a smart phone, a tablet personal computer (PC), a mobile phone, a video phone, an electronic book (e-book) reader, a desktop PC, a laptop PC, a netbook computer, a workstation, a server, a personal digital assistant (PDA), a portable multimedia player (PMP), a MPEG-1 audio layer-3 (MP3) player, a mobile medical device, a camera, and a wearable device. According to an embodiment, the wearable device may include at least one of an accessory type (e.g., a watch, a ring, a bracelet, an anklet, a necklace, a glasses, a contact lens, or a head-mounted display (HMD) device), a fabric or clothing integrated type (e.g., an electronic clothing), a body-mounted type (e.g., a skin pad or tattoo), and a bio-implantable type (e.g., an implantable circuit). In an embodiment, the wireless power transmission device or the electronic device may include at least one of, for example, a television, a set-top box linked wiredly or wirelessly to a television, a digital versatile disc (DVD) player, an audio, a refrigerator, an air conditioner, a vacuum cleaner, an oven, a microwave oven, a washing machine, an air cleaner, a set-top box, a home automation control panel, a smart thermostat, a security control panel, a media box, a video game console, an electronic dictionary, an electronic key, a camcorder, an electric vehicle, and an electronic photo frame. 
     In an embodiment, the wireless power transmission device or the electronic device may include at least one of various medical devices (e.g., various portable medical measuring devices (a blood glucose monitor, a heart rate monitor, a blood pressure monitor, a body temperature monitor, etc.), a magnetic resonance angiography (MRA), a magnetic resonance imaging (MRI), a computed tomography (CT) machine, and an ultrasonic machine), a navigation device, a global positioning system (GPS) receiver, an event data recorder (EDR), a flight data recorder (FDR), a vehicle infotainment device, an electronic device for a ship (e.g., a navigation device for a ship, a gyro-compass, etc.), avionics, security devices, an automotive head unit, a robot for home or industry, an automated teller machine (ATM) in banks, a point-of-sale (POS) device, or an Internet of things (IoT) device (e.g., a light bulb, various sensors, an electric or gas meter, a sprinkler device, a fire alarm, a thermostat, a streetlamp, a toaster, sporting goods, a hot water tank, a heater, a boiler, etc.). According to an embodiment, the wireless power transmission device or the electronic device may include at least one of a part of furniture or a building/structure, an electronic board, an electronic signature receiving device, a projector, and various types of measuring instruments (e.g., a water meter, an electric meter, a gas meter, a radio wave meter, and the like). In an embodiment, the wireless power transmission device or the electronic device may be flexible, or may be a combination of one or more of the aforementioned various devices. The wireless power transmission device or the electronic device according to an embodiment is not limited to the above described devices. In the present disclosure, the term “user” may indicate a person using an electronic device or a device (e.g., an artificial intelligence electronic device) using a wireless power transmission device or an electronic device. 
       FIG. 1A  is a block diagram of a wireless power transmitting device and an electronic device according to an embodiment. 
     Referring to  FIG. 1A , a wireless power transmitting device  100  according to an embodiment can wirelessly transmit power  161  to at least one electronic device  150 . The wireless power transmitting device  100  can transmit power  161  to the electronic device  150  in accordance with various charging methods. For example, the wireless power transmitting device  100  can transmit power  161  in accordance with an induction scheme. When the wireless power transmitting device  100  is based on the induction scheme, the wireless power transmitting device  100  may include, for example, a power source, an alternating current to direct current (AC-DC) circuit, an amplifying circuit, an impedance matching circuit, at least one capacitor, at least one coil, a communication modulation/demodulation circuit. At least one capacitor may constitute a resonance circuit in combination with at least one coil. The wireless power transmitting device  100  can be implemented by the method defined by Wireless Power Consortium (WPC) standard (or, Qi standard). For example, the wireless power transmitting device  100  can transmit power  161  in accordance with a resonance method. When the wireless power transmitting device  100  is based on the resonance method, the wireless power transmitting device  100 , for example, may include a power source, an AC-DC circuit, an amplifying circuit, an impedance matching circuit, at least one capacitor, at least one coil, and an out-band communication circuit (e.g., a Bluetooth Low Energy (BLE) communication circuit). At least one capacitor and at least one coil may constitute a resonance circuit. The wireless power transmitting device  100  can be implemented by the method defined by Alliance for Wireless Power (A4WP) standard (or Air Fuel Alliance (AFA) standard). The wireless power transmitting device  100  may include a coil that can generate an induced magnetic field when a current flows in accordance with the resonance method or the induction scheme. The process in which the wireless power transmitting device  100  generates an induced magnetic field may be expressed as that the wireless power transmitting device  100  wirelessly transmits power  161 . The electronic device  150  may include a coil that generates an induced electromotive force, using a magnetic field that is generated around the coil and of which the magnitude changes in accordance with time. A process in which the electronic device  150  generates an induced electromotive force through the coil may be expressed as that the electronic device  150  wirelessly receives power  161 . For example, the wireless power transmitting device  100  can transmit power  161  in accordance with an electromagnetic wave scheme. When the wireless power transmitting device  100  is based on the electromagnetic wave scheme, the wireless power transmitting device  100 , for example, may include a power source, an AC-DC circuit, an amplifying circuit, a distribution circuit, a phase shifter, a power reception antenna array including a plurality of patch antennas, and an out-band type communication circuit (for example, a BLE communication module). The patch antennas each can generate a radio frequency (RF) wave. The electronic device  150  may include a patch antenna that can output a current, using an RF wave generated around it. The process in which the wireless power transmitting device  100  generates an RF wave may be expressed as that the wireless power transmitting device  100  wirelessly transmits power  161 . A process by which the electronic device  150  outputs a current from a patch antenna, using an RF wave, may be referred to as the electronic device  150  wirelessly receiving power  161 . 
     The wireless power transmitting device  100  according to an embodiment may communicate with the electronic device  150 . For example, the wireless power transmitting device  100  may communicate with the electronic device  150  in accordance with an in-band scheme. The wireless power transmitting device  100  or the electronic device  150  may change a load (or impedance) for data to transmit, for example, in accordance with an on/off keying modulation method. The wireless power transmitting device  100  or the electronic device  150  can determine data that is transmitted from the counter device by measuring a load change (or an impedance change) based on a change in the intensity (e.g., amount, level, etc.) of current, voltage, or power of a coil. For example, the wireless power transmitting device  100  can communicate with the electronic device  150  in accordance with an out-band scheme. The wireless power transmitting device  100  or the electronic device  150  can transmit/receive data, using a communication circuit (for example, a BLE communication module) provided separately from a coil or a patch antenna. The wireless power transmitting device  100  can also transmit media data, and a plurality of different communication circuits (e.g., a BLE communication module, a Wi-Fi module, and a Wireless Gigabit Alliance (WiGig) module) may transmit/receive data (e.g., media data) and wireless power transmission/reception control signals. 
       FIG. 1B  is a conceptual diagram of a set-top box and a TV according to an embodiment. 
     A set-top box  101  according to an embodiment may wirelessly transmit power  161  to a TV  151 . The set-top box  101  may be an example of the wireless power transmitting device  100  and the TV  151  may be an example of the electronic device  150  that wirelessly receives power. The set-top box  101  may include a power transmission circuit based on at least one of the various wireless charging methods described above. It is just an example that the set-top box  101  wirelessly transmits power, and various electronic devices other than the set-top box  101 , for example, an electronic device that can transmit/receive data to/from the TV  151  such as a speaker may also be implemented to be able to wirelessly transmit power to the TV  151 . The set-top box  101  may transmit a communication signal  162  to the TV  151 . For example, the communication signal  162  may include data for content (e.g., audio, video, etc.) that is displayed on the TV  151 , data for controlling wireless charging, and TV control data for controlling the operation of the TV  151 . The media data, data for controlling wireless charting, and the TV control data may be transmitted/received by the same communication scheme or different communication schemes. For example, the set-top box  101  can transmit media data to the TV  151  in accordance with a Wi-Fi communication scheme using a Wi-Fi module, transmit/receive the data for controlling wireless charting using a BLE module, and transmit the TV control data to the TV  151  using an infrared (IR) module. For example, the TV  151  may include an IR module for receiving the control signal  163  according to an IR communication scheme from a controller  120  such as a remote controller and can receive the communication signal  162  including the TV control data from the set-top box  101 . The control signal  163  may be a signal including an operation command. The control signal  163  may be transmitted from the controller  120 , and the control signal  163  may also be referred to as an operation command. In an embodiment, at least two of the media data, data for controlling wireless charging, and TV control data can be transmitted/received by one communication module. For example, the set-top box  101  may transmit media data to the TV  151  through a Wi-Fi module and transmit data for controlling wireless charging and TV control data through the BLE module. 
     In an embodiment, the set-top box  101  may change the intensity (e.g., amount) of power that is wirelessly transmitted in real time in consideration of the amount of power required by the TV  151 . For example, the TV  151  may periodically or aperiodically report the amount of power corresponding to the current state to the set-top box  101 . The set-top box  101  may adjust the intensity of the power that is transmitted to the TV  151  based on the reporting result. For example, when the brightness of the TV  151  changes from a first brightness level to a second brightness level, the TV  151  may identify the required amount of additional power needed for the change of brightness and may report information about the additional required amount of power to the set-top box  101 . The set-top box  101  may adjust the intensity of power to transmit based on the received information about the required amount of power. Accordingly, even if the amount of power required by the TV  151  changes, the TV  151  can receive sufficient intensity of power in a consistent manner. Further, the intensity of power that is transmitted from the set-top box  101  to the TV  151  may be determined based on the current state of the TV  151 , so waste of power can be reduced or prevented. In another example, the set-top box  101  may check the current state of the TV  151  and calculate the amount of power required by the TV  151  based on a control signal received from a remote controller etc. For example, the set-top box  101  may recognize that the TV  151  is currently in a brightness adjustment state and receive a control signal for increasing the brightness from a remote controller etc. The set-top box  101  may calculate the amount of power that would be required by the TV  151  once the control signal is applied, and adjust the intensity of power that is wirelessly transmitted based on the calculated result. 
       FIG. 2  is a conceptual diagram illustrating a process in which an object enters between a wireless power transmitting device and an electronic device according to an embodiment. 
     The wireless power transmitting device  100  according to an embodiment may wirelessly transmit power for a charging section  202 . The charging section  202  may be determined by the arranged position or the arranged direction of a power transmission circuit included in the wireless power transmitting device  100 . The charging section  202  may mean a section or area where the magnitude of a magnetic field or an electric filed transmitted from the wireless power transmitting device  100  is measured at a threshold value or more. For example, the threshold value for determining the charging section  202  may be the magnitude of a magnetic field or an electric field that has been proved not to be harmful even if it is applied to a human body. The wireless power transmitting device  100  may form a magnetic field or an electric field having a magnitude of a threshold value or more in the charging section  202  by applying a current to a coil. Alternatively, the wireless power transmitting device  100  may form an RF wave having a magnitude of a threshold value or more for at least one location in the charging section  202  by performing beam-forming on the location of the charging section  202 , using an array of a plurality of patch antennas. Accordingly, the dividing lines between the charging section  202  and surrounding sections  201  and  203  may be changed in accordance with the intensity of the power that is transmitted by the wireless power transmitting device  100 . When the wireless power transmitting device  100  transmits power having relatively high intensity, the area of the charging section  202  may be relatively large in size, and when the wireless power transmitting device  100  transmits power having relatively low intensity, the area of the charging section  202  may be relatively small in size. 
     In the present disclosure, wireless transmission of power may mean forming an induced magnetic field by applying a current to a coil or forming an RF wave using a patch antenna array. Further, in the present disclosure, wireless reception of power may mean that a coil generates an induced electromotive force from a magnetic field generated around it or converts an RF wave into a current using at least one patch antenna. The wireless power transmitting device  100  may monitor whether an obstacle appear in surrounding areas such as the surrounding sections  201  and  203  at the left and right sides of the charging section  202 . When an obstacle  210  moves into the charging section  202  from the surrounding section  201 , a magnetic field or an electric field having a magnitude of a threshold value or more can be applied to the obstacle  210 . The obstacle  210  may be an object, a person, an animal, or any animate/inanimate object that is capable of affecting or interfering with the electromagnetic field in the charging section. The wireless power transmitting device  100  may monitor the surrounding section  210  and  203 , and when it is determined that the obstacle  210  has entered the charging section  202 , the wireless power transmitting device  100  may perform an operation prepared for entry of the obstacle  210  into the charging section  202 . For example, the wireless power transmitting device  100  may reduce the intensity of power to transmit by a predetermined level in advance, prepare for changing the charging path, or output a warning signal through various output devices. The wireless power transmitting device  100  may monitor the obstacle  210  entering the charging section  202  from the surrounding section  201 . The wireless power transmitting device  100  may perform an operation corresponding to entry into the charging section of the obstacle  210 . When it is detected that the obstacle  210  has entered the charging section  202 , the wireless power transmitting device  100  may additionally reduce the intensity of the power that is transmitted, change the charging path, or output an additional warning signal. 
     The wireless power transmitting device  100  may detect the obstacle  210  moving out of the surrounding sections  201  and  203  from the charging section  202 . The wireless power transmitting device  100  may perform an operation corresponding to movement out of the charging section  202  of the obstacle  210 . When it is detected that the obstacle  210  has moved out of the charging section  202 , the wireless power transmitting device  100  may increase the intensity of the power that is transmitted or change again the charging path. In this specification, when the wireless power transmitting device  100  or the electric device  150  performs a specific operation, it may mean that various pieces of hardware included in the wireless power transmitting device  100  or the electronic device  150 , for example, a control circuit, a coil, or a patch antenna performs the specific operation. Alternatively, when the wireless power transmitting device  100  or the electric device  150  performs a specific operation, it may mean that they control another piece of hardware to perform the specific operation. Alternatively, when the wireless power transmitting device  100  or the electric device  150  performs a specific operation, it may mean that an instruction stored to perform the specific operation in a storage circuit (e.g., a memory) of the wireless power transmitting device  100  or the electronic device  150  makes a processor or another piece of hardware perform the specific operation. 
     For example, when the obstacle  210  moves from the surrounding section  201  to the charging section  202 , the wireless power transmitting device  100  may gradually reduce the intensity of the power that is transmitted, in accordance with the path of the obstacle  210 . Alternatively, when the obstacle  210  reaches the boundary between the charging section  202  and the surrounding section  201 , the wireless power transmitting device  100  may reduce at one time the intensity of the power that is transmitted. The wireless power transmitting device  100  may measure the time that has passed after the obstacle  210  enters the surrounding section  201  or the charging section  202 , and may perform a predetermined operation when the measured time exceeds a threshold value. 
       FIG. 3  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. 
     In operation  310 , the wireless power transmitting device  100  may wirelessly transmit power for a first section (also referred to as “first area”) around the wireless power transmitting device  100 . The first section, for example, may be the charging section  202  in  FIG. 2 . The wireless power transmitting device  100  may adjust the transmission direction of power by adjusting one of the phases and amplitudes of an electrical signals input to an array of patch antennas, and for example, the wireless power transmitting device  100  may form an RF wave by performing beam-forming on at least one location in the first section. Alternatively, the wireless power transmitting device  100  may not adjust the transmission direction of power, and when the wireless power transmitting device  100  applies a current to a coil, a magnetic field or an electric field may be formed in the first section. The electronic device  150  may wirelessly receive the power transmitted from the wireless power transmitting device  100 . The wireless power transmitting device  100  may detect the electronic device  150  on the basis definitions under various standards, and perform preprocesses prescribed in advance for charging and transmit power. 
     In operation  320 , the wireless power transmitting device  100  may determine whether an obstacle has been detected in a second section (also referred to as “second area”) around the wireless power transmitting device  100 . The second section, for example, may be the surrounding sections  201  and  203  in  FIG. 2 . The magnitude of a magnetic field or an electric filed transmitted from the wireless power transmitting device  100  may be measured below the threshold value in part or all of the surrounding sections  201  and  203 . The wireless power transmitting device  100  may detect whether an obstacle has shown, using various sensors. When an obstacle is detected in the second section, the wireless power transmitting device  100  may perform a first operation corresponding to detection of an obstacle in the second section in operation  330 . For example, the wireless power transmitting device  100  may reduce the intensity of the power that is transmitted by a predetermined level, determine the transmission path of power to correspond to the location of the obstacle, or output a warning signal. In operation  340 , the wireless power transmitting device  100  may determine that movement of the obstacle to the first section has been detected. When it is detected that an obstacle moves to the first section, the wireless power transmitting device  100  can perform a second operation corresponding to detection of an obstacle in the first section in operation  350 . For example, the wireless power transmitting device  100  may reduce the intensity of the power that is transmitted, change the transmission path of power, or output a warning signal. As the intensity of the power that is transmitted is reduced, the intensity of power that is applied to the obstacle  210  may be decreased, so it is possible to secure safety of a human or an animal. Alternatively, the transmission path of the power may be changed so as to not influence the obstacle  210 , and/or to ensure safety of a human and an animal. The wireless power transmitting device  100  may further increase safety of a living body by estimating that the living body will enter the first section to which relatively high intensity of power is applied, and then performing a corresponding operation, before the living body enters the first section. 
       FIG. 4A  is a block diagram of a wireless power transmitting device and an electronic device according to an embodiment. 
     The wireless power transmitting device  100  according to an embodiment may include a power transmission circuit  109 , a control circuit  102 , a communication circuit  103 , a sensor  104 , a memory  105 , and a power source  106 . The electronic device  150  according to an embodiment may include a power reception circuit  159 , a control circuit  152 , a communication circuit  153 , a load  154 , a power management integrated circuit (PMIC)  155 , and a memory  156 . 
     The power transmission circuit  109  according to an embodiment may wirelessly transmit power to the power reception circuit  159  in accordance with at least one of an induction scheme, a resonance method, and an electromagnetic wave scheme. The detailed configuration of the power transmission circuit  109  and the power reception circuit  159  will be described in more detail with reference to  FIGS. 4D and 4E . The control circuit  102  may control the intensity of the power that is transmitted by the power transmission circuit  109 . For example, the control circuit  102  may control the intensity of the power that is transmitted by the power transmission circuit  109  by controlling the intensity of power that is output from the power source  106  or by controlling the amplification gain of a power amplifier included in the power transmission circuit  109 . The control circuit  102  may adjust the intensity of power that is output from the power source  106  by controlling the duty cycle or frequency of power that is output from the power source  106 . The control circuit  102  may control the intensity of power that is applied to the power transmission circuit  109  by controlling the intensity of bias voltage of the power amplifier. The control circuit  102  or the control circuit  152  may be implemented as various circuits that can perform calculation such as a general-purpose processor such as a CPU, a mini computer, a microprocessor, a microcontroller unit (MCU), a field-programmable gate array (FPGA), etc. The control circuit  102 , for example, may control at least one of the power source  106  and the power transmission circuit  109  to transmit power having a predetermined intensity. 
     The power reception circuit  159  according to an embodiment may wirelessly receive power from the power transmission circuit  109  in accordance with at least one of an induction scheme, a resonance method, and an electromagnetic wave scheme. The power reception circuit  159  may perform power processing that rectifies the received power from an AC waveform into a DC waveform, convert voltage, or regulate power. The PMIC  155  may process the received and processed power to be suitable for hardware (e.g., the load  154 ) and then transmit the power to each hardware. The load  154 , for example, may include a display that displays media data received from the wireless power transmitting device  100 , and may include various pieces of hardware that consume power. The control circuit  152  may control the entire operation of the electronic device  150 . Instructions for performing the entire operation of the electronic device  150  may be stored in the memory  156 . The communication circuit  103 , for example, may transmit media data signals or information about wireless power transmission/reception to the communication circuit  153 . The memory  105  may store the instructions for performing the operation of the wireless power transmitting device  100 . The memory  105  or the memory  156  may be implemented in various types such as a read-only memory (ROM), a random access memory (RAM), a flash memory, etc. The sensor  104  may sense data about the surrounding section  203  and the control circuit  102  may determine whether an obstacle has appeared in the surrounding section  203 , using the sensed data. The sensor  104  may also sense data bout the other surrounding section  201  and the charging section  202 . Alternatively, one or more additional sensors may sense data about at least one of the other surrounding section  201  or the charging section  202 . The sensor  104  may be any type of sensor that is capable of sensing data for detecting the presence of an obstacle, and it may be implemented in various types such as a communication circuit, a camera, a proximity sensor, and an ultrasonic sensor. The control circuit  102  may detect an obstacle showing in the surrounding section  203 , using the sensed data, and perform an operation corresponding to appearance of an obstacle in the surrounding section  203 . The sensor  104  or other sensors may sense data about an obstacle entering the charging section  202 . The control circuit  102  may detect an obstacle based on the data about entry of an obstacle into the charging section  202  and perform a corresponding operation. The control circuit  102  may detect an obstacle exiting the charging section  202  based on data from the sensor  104  or other sensors and perform a corresponding operation. The control circuit  102  may detect an obstacle exiting the surrounding section  203  based on data from the sensor  104  or other sensors and perform a corresponding operation. In an embodiment, the control circuit  102  may reduce the intensity of the power that is transmitted, for example, by controlling at least one of the power source  106  and the power transmission circuit  109  in order to perform various operations. Alternatively, the control circuit  102 , for example, may adjust the transmission path through which the power is transmitted, by controlling the power transmission circuit  109 . Alternatively, the control circuit  102  may output a warning message through an output device (e.g., a mobile device, a television, a display, a speaker, etc.). The control circuit  102  may transmit a warning message to the communication circuit  103  of the electronic device  150  through the communication circuit, and in this case, the electronic device  150  may output a warning message through the output device. 
       FIG. 4B  is a block diagram of a wireless power transmitting device, an electronic device, and a sensor according to an embodiment. 
     The wireless power transmitting device  100  shown in  FIG. 4B  may not include the sensor  104 , as compared with the wireless power transmitting device  100  shown in  FIG. 4A . An external sensor  410  may be similar to the sensor  104 . The external sensor  410  may sense data related to the surrounding section  203  and transmit the sensed data to the communication circuit  103  of the wireless power transmitting device  100 . The control circuit  102  may detect an obstacle showing in the surrounding section  203  based on the data received through the communication circuit  103  and perform a corresponding operation. The control circuit  102  may detect an obstacle entering the charging section  202  based on data from the external sensor  410  or other sensors and perform a corresponding operation. The control circuit  102  may detect an obstacle exiting the charging section  202  based on data from the external sensor  410  or other sensors and perform a corresponding operation. 
       FIG. 4C  is a block diagram of a wireless power transmitting device and an electronic device according to an embodiment. 
     The wireless power transmitting device  100  shown in  FIG. 4C  may not include the sensor  104 , as compared with the wireless power transmitting device  100  shown in  FIG. 4A . The electronic device  150  may include a sensor  420 . The sensor  420  may be similar to the sensor  104 . The sensor  420  may sense data related to the surrounding section  203  and transmit the data sensed through the communication circuit  153  to the communication circuit  103  of the wireless power transmitting device  100 . The control circuit  102  may detect an obstacle showing in the surrounding section  203  based on the data received through the communication circuit  103  and perform a corresponding operation. The control circuit  102  may detect an obstacle entering the charging section  202  based on data from the sensor  420  of the electronic device  150  or other sensors and perform a corresponding operation. The control circuit  102  may detect an obstacle exiting the charging section  202  based on data from the sensor  420  or other sensors and perform a corresponding operation. 
       FIG. 4D  is a block diagram of a power transmission circuit and a power reception circuit according to an induction scheme or a resonance method according to an embodiment. 
     In an embodiment, the power transmission circuit  109  may include a power adapter  411 , a power generation circuit  412 , a coil  413 , and a matching circuit  414 . The power adapter  411  may receive power from the power source  106  and provide the power to the power generation circuit  412 . The power generation circuit  412  may convert and/or amplify the received power into an AC waveform and transmit the received power (e.g., converted and/or amplified power) to the coil  413 . When the power is applied to the coil  413 , an induced magnetic field of which the magnitude changes as time passes may be formed by the coil  413 , so that power is wirelessly transmitted. Capacitors constituting a resonance circuit in combination with the coil  413  may be further included in the power transmission circuit  109 . The resonance frequency may be defined by a standard, (e.g., 100 to 205 kHz in accordance with Qi standard by an induction scheme or 6.78 MHz in accordance with AFA standard) by a resonance method. The matching circuit  414  may be controlled by the control circuit  102  to match impedances of the power transmission circuit  109  and the power reception circuit  159  by changing at least one of capacitance and reactance of a circuit connected to the coil  413 . An induced electromotive force may be generated at the coil  421  of the power reception circuit  159  by a magnetic field that is generated around the coil  421  and of which the magnitude changes as time passes, and accordingly, the power reception circuit  159  may wirelessly receive power. A rectifying circuit  422  may rectify the received power having an AC waveform. A converting circuit  423  may adjust the voltage of the rectified power and transmit the power to the PMIC  155 . The power reception circuit  159  may further include a regulator and the converting circuit  423  may be replaced by a regulator. The matching circuit  424  may be controlled by the control circuit  152  to match impedances of the power transmission circuit  109  or the power reception circuit  159  by changing at least one of capacitance and reactance of a circuit connected to the coil  421 . 
       FIG. 4E  is a block diagram of a power transmission circuit and a power reception circuit according to an electromagnetic wave scheme according to an embodiment. 
     In an embodiment, the power transmission circuit  109  may include an amplifying circuit  431 , a distribution circuit  432 , a phase shifter  433 , and a power transmission antenna array  434 . In an embodiment, the power reception circuit  159  may include a power reception antenna  441 , a rectifying circuit  442 , and a converting circuit  443 . 
     The amplifying circuit  431  may amplify power received from the power source  106  and provide the amplified power to the distribution circuit  432 . The amplifying circuit  431  may be implemented by various amplifiers such as a driver amplifier (DA), a high-power amplifier (HPA), a gain block amplifier (GBA), or a combination thereof, but is not limited thereto. The distribution circuit  432  may distribute power output from the amplifying circuit  431  to a plurality of paths. If any circuit can distribute input power of signal to a plurality of paths, it is not limited as the distribution circuit  432 . For example, the distribution circuit  432  may distribute power to paths corresponding to the number of patch antennas included in the power transmission antenna array  434 . The phase shifter  433  may shift the phases (or delays) of a plurality of items of AC power provided from the distribution circuit  432 . A plurality of phase shifters  433  may be provided, and, for example, as many phase shifters as the patch antennas included in the power transmission antenna arrays  434  may be provided. For example, a hardware element such as HMC642 or HMC1113 may be used as the phase shifter  433 . The degree of shifting of the phase shifter  433  may be controlled by the control circuit  102 . The control circuit  102  may determine the location of the electronic device  150  and shift the phases of a plurality of items of AC power to perform constructive interference or beam-forming on RF waves at the location of the electronic device  150  (or the location of the power reception antenna  414  of the electronic device  150 ). The patch antennas included in the power transmission antenna array  434  may generate sub-RF waves based on received power. RF waves interfered with the sub-RF waves may be converted into current, voltage, or power and then output by the power reception antenna  441 . The power reception antenna  441  may include a plurality of patch antennas and generate current, voltage, or power of an AC waveform, using RF waves, that is, electromagnetic waves formed around it, in which the current, voltage, or power can be referred to as received power. The rectifying circuit  442  may rectify the received power into a DC waveform. The converting circuit  443  may increase or decrease the voltage of the power of a DC waveform to a predetermined value and then output the power to the PMIC  155 . 
       FIG. 5  is a conceptual diagram of a wireless power transmitting device according to an embodiment. 
     A wireless power transmitting device  100  according to an embodiment may include a power transmission circuit  109  and sensors  501  and  502 . The sensors  501  and  502  may be implemented as communication circuits and transmit communication signals  511  and  512 , respectively. The sensors  501  and  502  may be respectively positioned at the left and right sides from the power transmission circuit  109 , and for example, they may be disposed at positions where they can transmit the communication signals  511  and  512  to surrounding sections at left and right sides of a charging section. The transmission signals  511  and  512  may be reflected by surrounding structures. Reflected waves  521  and  522  may travel to the sensors  501  and  502 , respectively, and the sensors  501  and  502  may measure at least one of the amplitudes, phases, and time of flight of the reflected waves  521  and  522 . At least one of the amplitude and phase of the reflected waves  521  and  522  may be changed in comparison to the communication signals  511  and  512 . The wireless power transmitting device  100  may store, for example, reference information shown in Table 1. 
     
       
         
           
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                 Sensor 
                 Amplitude attenuation 
                 Phase change 
                 Time of flight 
               
               
                 number 
                 (dB) 
                 (rad) 
                 (μs) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
            
               
                 501 
                 −2 
                 +13 
                 0.12 
               
               
                 502 
                 −4.1 
                 −3 
                 0.28 
               
               
                   
               
            
           
         
       
     
     Alternatively, the wireless power transmitting device  100  may store at least one of the amplitude and phase of received reflected waves. The wireless power transmitting device  100  may periodically or aperiodically receive the reflected waves  521  and  522  and measure the characteristics of the reflected waves. The wireless power transmitting device  100  may detect an obstacle showing in surrounding sections with reference to the reference information. For example, as in Table 1, the reference signal for the sensor  502  may be signal attenuation of −4.1 dB, a phase change of −3 rad, and time of flight of 0.28 μs. The wireless power transmitting device  100  may determine that a signal reflected at the second point of time has signal attenuation of −1.2 dB, a phase change of 40 rad, and time of flight of 0.12 μs in comparison to a communication signal. That is, the wireless power transmitting device  100  can find out that a difference of 2.9 dB was detected in the signal attenuation, a difference of 43 rad was detected in the phase change, and a difference of 0.16 μs was detected in the time of flight. When determining that the difference between the reference information and the characteristics of a reflected signal exceeds a threshold value, the wireless power transmitting device  100  may determine that an obstacle has appeared in the surrounding section corresponding to the corresponding sensor. In an embodiment, the wireless power transmitting device  100  may compare differences in the signal attenuation, phase change, and time of flight with threshold values set for factors or compare a sum of weights with threshold values set for the sum of weights. Alternatively, the wireless power transmitting device  100  may detect a presence of an obstacle based on a change in at least one of the amplitude and phase of a reflected wave. In an embodiment, the sensors  501  and  502  may be communication circuits for communicating with the electronic device  150  or may be general-purpose communication circuits not necessarily specifically designed to communicate only with the electronic device  150 . In an embodiment, the electronic device  150  may include sensors that are implemented as communication circuits at the left and right side of a power reception circuit. The electronic device  150  may store characteristics of a reflected wave received from a communication circuit, for example, reference information as shown in Table 1, and then detect an obstacle showing in surrounding sections at left and right side of a charging section with reference to the reference information. When an obstacle is detected, the electronic device  150  may transmit a notification message about the appearance of the obstacle to the wireless power transmitting device  100 . Alternatively, in an embodiment, an external sensor separately provided from the wireless power transmitting device  100  or the electronic device  150  may be implemented as a communication circuit and detect an obstacle by measuring a reflected wave. When an obstacle is detected, the external sensor may transmit appearance of the obstacle to the wireless power transmitting device  100 . 
       FIG. 6  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. 
     In operation  610 , the wireless power transmitting device  100  may transmit a first communication signal toward at least a portion of the second section and receive a first reflected signal for the first communication signal. For example, the wireless power transmitting device  100  may control the first communication signal toward at least a portion of the second section. Alternatively, the wireless power transmitting device  100  may transmit a non-directional first communication signal, and in this case, a communication circuit that receives the first communication signal may be positioned to corresponding to the location of the second section. 
     In operation  620 , the wireless power transmitting device  100  may store the information of the first reflected signal. The wireless power transmitting device  100  may store at least one of the amplitude, phase, amplitude attenuation, a phase change, and time of flight of the first reflected signal. In operation  630 , the wireless power transmitting device  100  may transmit a second communication signal toward at least a portion of the second section and receive a second reflected signal for the second communication signal. The transmission condition for the second communication signal may be the same as that for the first communication signal. In operation  640 , the wireless power transmitting device  100  may determine whether the difference between the information of the second reflected signal and the information of the first reflected signal exceeds a threshold value. When it is determined that the difference exceeds the threshold value, the wireless power transmitting device  100 , in operation  650 , may perform a first operation corresponding detection of an obstacle in the second section and monitor movement of the obstacle to the first section. Detection of an obstacle in the first section may be performed in the same way as detection of an obstacle in the second section and the wireless power transmitting device  100  may perform detection on an obstacle in the first section, using the same or different sensor. Alternatively, the wireless power transmitting device  100  may perform detection of an obstacle in a different way for the first section. In an embodiment, the wireless power transmitting device  100  may detect an obstacle in the first section in accordance with a rogue object detection method defined by various wireless charging standards. For example, the wireless power transmitting device  100  may measure a change in impedance in a resonance circuit and detect an obstacle in the first section when an advertisement signal is not received. The wireless power transmitting device  100  may include an ultrasonic transmission/reception circuit, instead of a communication circuit, as a sensor. The wireless power transmitting device  100  may transmit an ultrasonic wave and receive a reflected wave for the ultrasonic wave and may also detect an obstacle based on the characteristics of the reflected signal. 
       FIG. 7  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. 
     In operation  710 , the wireless power transmitting device  100  according to an embodiment may obtain an image of the second section around the electronic device  150 , for example, an image of a surrounding section. The wireless power transmitting device  100  may include a camera that can photograph the second section and obtain an image of the second section through the camera. Alternatively, the electronic device  150  may include a camera that can photograph the second section, for example, a surrounding section. The electronic device  150  may transmit the image obtained through the camera to the wireless power transmitting device  100  and the wireless power transmitting device  100  may obtain the image of the second section from the electronic device  150 . Alternatively, another electronic device other than the wireless power transmitting device  100  or the electronic device  150  may include a camera for photographing the second section around the electronic device  150 . The other electronic device may transmit the image obtained through the camera to the wireless power transmitting device  100  and the wireless power transmitting device  100  may obtain the image of the second section from another electronic device. The camera may be a common camera for taking two-dimensional (2D) images or a depth camera that can obtain three-dimensional (3D) information. 
     In operation  720 , the wireless power transmitting device  100  may analyze the image and determine whether an obstacle has been detected in the second section based on the analyzed result. For example, the wireless power transmitting device  100  may store an image when there is no obstacle in the second section as a reference image and compare an obtained image with the reference image. The wireless power transmitting device  100  may determine whether an obstacle has been detected in the second section based on the comparing result. The wireless power transmitting device  100  may recognize the electronic device  150 , for example, a TV from the obtained image and determine ports corresponding to the charging section and the surrounding section in the image based on the location of the recognized TV. The wireless power transmitting device  100  may determine the portion based on an object corresponding to the TV (e.g., the portion in front of an object corresponding to the TV) in the image as the portion corresponding to the charging section and the portions at the left and right sides of the charging section in the image as the portion corresponding to the surrounding sections. The wireless power transmitting device  100  may determine whether an object that had not existed has been detected in the portions corresponding to the surrounding sections, so it may determine whether an obstacle has appeared in the surrounding sections. The wireless power transmitting device  100  may recognize that a specific object in an image is an electronic device such as a TV, for example, by detecting the difference in brightness of a TV when the TV was turned on and off, and detect an electronic device that wirelessly receive power based on a method of recognizing things in various images. 
     When it is determined that an obstacle has been detected in the second section, the wireless power transmitting device  100  may perform a first operation corresponding to detection of an obstacle in the second section in operation  730 . In operation  740 , the wireless power transmitting device  100  may obtain images of the first section (e.g., the charging section) and the second section. The wireless power transmitting device  100  may obtain images of the first section and the second section through the camera included in the wireless power transmitting device  100 , as described above, or obtain images of the first section and the second section from the electronic device  150 , or obtain images of the first section and the second section from another electronic device. The images obtained in operation  730  and the images obtained in operation  710  may be the same or different. When the images obtained in operation  730  and the images obtained in operation  710  are different, the photographing direction of the camera included in the wireless power transmitting device  100 , the electronic device  150 , or another electronic device is changed and the wireless power transmitting device  100  may obtain images of the first section and the second section. Alternatively, the wireless power transmitting device  100  may obtain an image of the first section. 
     In operation  750 , the wireless power transmitting device  100  may analyze the images and determine whether an obstacle has been detected in the first section based on the analyzed result. When it is determined that an obstacle has shown in the first section, the wireless power transmitting device  100  may perform a second operation corresponding to detection of an obstacle in the first section in operation  760 . 
     The wireless power transmitting device  100  may detect an obstacle, using a proximity sensor etc. other than the method described above, so the method that may detect an obstacle is not limited. 
       FIG. 8  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. 
     In operation  805 , the wireless power transmitting device  100  according to an embodiment may wirelessly transmit power for the first section under a first transmission condition. The transmission condition may be conditions related to the intensity of power to be transmitted, for example, the intensity of current to be applied to a coil, the intensity of voltage to be applied to a coil, and the intensity of power to be applied to a coil. Alternatively, the transmission condition may be a condition related to the transmission direction of power, for example, the intensity of current input to a plurality of patch antennas and the degree of phase delay of current input to a plurality of patch antennas. In operation  810 , the wireless power transmitting device  100  may determine whether an obstacle has been detected in the second section (e.g., a surrounding section) around the wireless power transmitting device  100 . When an obstacle is detected in the second section, in operation  815 , the wireless power transmitting device  100  may wirelessly transmit power for the first section under a second transmission condition. The wireless power transmitting device  100  may change at least one of the condition related to the intensity of power to be transmitted and the condition related to the transmission direction of power based on the second transmission condition. 
     In operation  820 , the wireless power transmitting device  100  may detect whether obstacle in the second section moves. When determining that the obstacle moves out of the second section, in operation  805 , the wireless power transmitting device  100  may wirelessly transmit power again under the first transmission condition. When it is determined that the obstacle has moved into the first section (e.g., the charging section), in operation  825 , the wireless power transmitting device  100  may wirelessly transmit power for the first section under a third transmission condition. The wireless power transmitting device  100  may change at least one of the condition related to the intensity of power to be transmitted and the condition related to the transmission direction of power based on the third transmission condition. In operation  830 , the wireless power transmitting device  100  may detect that the obstacle moves out of the first section. When the obstacle exits the first section, the wireless power transmitting device  100  may wirelessly transmit power under the second transmission condition. When it is determined that the obstacle has not left the first section, the wireless power transmitting device  100  may output a warning in operation  835 . When determining the obstacle stays in the first section, the wireless power transmitting device  100  may maintain the power transmission under the third transmission condition. 
       FIG. 9  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. 
     In operation  910 , the wireless power transmitting device  100  according to an embodiment may wirelessly transmit power having first intensity for the first section around the wireless power transmitting device  100 . For example, the wireless power transmitting device  100  may transmit power of first intensity for driving the electronic device  150 . The wireless power transmitting device  100  may obtain information related to the electronic device (e.g., identification information and rated power information) and determine the first intensity based on the information. The wireless power transmitting device  100  may also obtain information about operation that is performed by the electronic device  150  or information about the current state of the electronic device  150 , and may also determine the first intensity based on the information. For example, the wireless power transmitting device  100  may obtain information about the current brightness and the magnitude of volume of a TV and wirelessly transmit power corresponding to power of the first intensity corresponding to the information. 
     In operation  920 , the wireless power transmitting device  100  may detect an obstacle showing in the second section (e.g., a surrounding section) around the wireless power transmitting device  100 . As described above, the wireless power transmitting device  100  may detect an obstacle showing in the second section, using the characteristics of a reflected wave, the result of analyzing an image, or sensing data from various sensors. In operation  930 , the wireless power transmitting device  100  may wirelessly transmit power having second intensity for the first section (e.g., the charging section) around the wireless power transmitting device  100 . The second intensity may be less than or equal to the first intensity. In operation  940 , the wireless power transmitting device  100  may detect that the obstacle moves to the first section. When it is detected that the obstacle moves to the first section, in operation  950 , the wireless power transmitting device  100  may wirelessly transmit power having third intensity for the first section around the wireless power transmitting device  100 . The third intensity may be less than or equal to the second intensity. When the wireless power transmitting device  100  intends to reduce the intensity of the power that is transmitted, it may reduce the intensity of the power after transmitting a command to reduce required power first to the electronic device  150 . Accordingly, even if the wireless power transmitting device  100  reduces the intensity of the power that is transmitted, it is possible to prevent the electronic device  150  from being turned off due to receiving less power than required. 
       FIG. 10  is a timing diagram illustrating a method of operating a wireless power transmitting device. 
     In operation  1011 , the wireless power transmitting device  100  according to an embodiment may wirelessly transmit power  1001  having first intensity A. When the wireless power transmitting device  100  transmits the power  1001  having the first intensity A, it may mean that the wireless power transmitting device  100  applies current or voltage having intensity corresponding to the power having the first intensity A to a coil or a patch antenna. In operation  1013 , the electronic device  150  according to various embodiments, can receive power  1002  having third intensity B and consume first required power. For example, when the electronic device  150  is the TV  151  shown in  FIG. 1B , the electronic device  150  can display media data through a display, using the received power  201 . The magnetic field corresponding to the power  1001  having the first intensity A may be attenuated, depending on the distance between the wireless power transmitting device  100  and the electronic device  150 , and accordingly, the third intensity B of the power  1002  that the electronic device  150  receives may be smaller than the first intensity A. When the electronic device  150  is the TV  151 , the electronic device  150  can display media data with first brightness, and accordingly, the first required power can be consumed. 
     In operation  1015 , the wireless power transmitting device  100  according to various embodiments can detect an obstacle showing in at least one of the first section and the second section and can determine to reduce the intensity of the power that is transmitted to the second intensity. The wireless power transmitting device  100  can transmit a message related to reduction of the intensity of the power that is transmitted in operation  1017  before reducing the intensity of the power that is transmitted to the second intensity. In operation  1019 , the electronic device  150  can reduce the intensity of required power based on reception of the message. For example, when the electronic device  150  is the TV  151 , the electronic device  150  may display media data with second brightness that is darker than the first brightness, and accordingly, second required power less than the first required power may be consumed. In operation  1021 , the electronic device  150  may transmit a message related to reduction of required power to the wireless power transmitting device  100 . In operation  1023 , the wireless power transmitting device  100  may reduce the intensity of power  1003  that is transmitted to the second intensity (A-AA). The electronic device  150  may receive power  1004  having fourth intensity (B-AB). The fourth intensity (B-AB) may be greater than the intensity of the second required power, so it is possible to prevent the electronic device  150  from being turned off due to the small intensity of power received. For example, the wireless power transmitting device  100  may store related information shown in Table 2. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 2 
               
               
                   
                   
               
               
                   
                 State of electronic device 
                 Power to transmit 
               
               
                   
                   
               
             
            
               
                   
                 Brightness 1 
                 30 W 
               
               
                   
                 Brightness 2 
                 45 W 
               
               
                   
                 Brightness 3 
                 60 W 
               
               
                   
                 Brightness 4 
                 75 W 
               
               
                   
                   
               
            
           
         
       
     
     For example, when an obstacle is not detected, the wireless power transmitting device  100  may transmit power of 75 W so that the TV  151  can display media data with the brightness 4. The wireless power transmitting device  100  may determine to reduce the intensity of the power that is transmitted from 75 W to 60 W based on detection of the obstacle in the second section (e.g., a surrounding section). The wireless power transmitting device  100  may transmit a message for adjusting the brightness from the brightness 4 to the brightness 3 to the TV  151  before reducing the intensity of the power that is transmitted. The TV  151  may adjust the brightness from the brightness 4 to the brightness 3 based on the received message. After the TV  151  reduces the required power, the wireless power transmitting device  100  may reduce the intensity of the power that is transmitted from 75 W to 60 W. The wireless power transmitting device  100  may detect that the obstacle moves to the first section (for example, the charging section). The wireless power transmitting device  100  can determine to reduce the intensity of the power that is transmitted from 60 W to 30 W based on detection of the obstacle in the first section. The wireless power transmitting device  100  can transmit a message for adjusting the brightness from the brightness 3 to the brightness 1 to the TV  151  before reducing the intensity of the power that is transmitted. The TV  151  can adjust the brightness from the brightness 3 to the brightness 1 based on the received message. After the TV  151  reduces the required power, the wireless power transmitting device  100  may reduce the intensity of the power that is transmitted from 60 W to 30 W. In an embodiment, the electronic device  150  may adjust the required power by adjusting not only the brightness, but various states. The wireless power transmitting device  100  may reduce the required power of the electronic device  150  before reducing the intensity of the power that is transmitted. In an embodiment, the electronic device  150  may detect an obstacle in at least one of the first section and the second section. In this case, the electronic device  150  may reduce the required power and then request the wireless power transmitting device  100  to reduce the intensity of the power that is transmitted. 
       FIG. 11  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. The embodiment shown in  FIG. 11  will be described in more detail with reference to  FIGS. 12 and 13 .  FIG. 12  is a diagram illustrating changing power transmission paths using a plurality of coils according to an embodiment.  FIG. 13  is a diagram illustrating changing power transmission paths using a plurality of patch antennas according to an embodiment. 
     In operation  1110 , the wireless power transmitting device  100  according to an embodiment may wirelessly transmit power for the first section (e.g., the charging section) around the wireless power transmitting device  100  through a first path. In operation  1120 , the wireless power transmitting device  100  may detect an obstacle showing in the second section (e.g., a surrounding section) around the wireless power transmitting device  100 . When an obstacle is detected, in operation  1130 , the wireless power transmitting device  100  may determine a second path different from the first path based on the location of the obstacle. Referring to  FIG. 12 , a power transmission circuit  1200  of the wireless power transmitting device  100  may include a plurality of transmission coils  1211  to  1216  and a power reception circuit  1220  of the electronic device  150  may include a plurality of reception coils  1221  to  1226 . The of transmission coils  1211  to  1216  may form magnetic couplings  1231  to  1236 , respectively. The wireless power transmitting device  100  may determine that a first obstacle  1240  has entered the charging section in a downward direction  1241 . In this case, for example, the wireless power transmitting device  100  may control the circuits so as not to form the first magnetic coupling  1231  by not applying a current to the first transmission coil  1211 . Accordingly, the wireless power transmitting device  100  may wirelessly transmit power, using a first power transmission path corresponding to the second magnetic coupling  1232  to the sixth magnetic coupling  1236 . The wireless power transmitting device  100  may determine that a second obstacle  1250  has entered the charging section in an upward direction  1251 . In this case, for example, the wireless power transmitting device  100  may control the circuits so as not to form the sixth magnetic coupling  1236  by not applying a current to the sixth transmission coil  1216 . Accordingly, the wireless power transmitting device  100  may wirelessly transmit power, using a second power transmission path corresponding to the first magnetic coupling  1231  to the fifth magnetic coupling  1235 . As described above, the wireless power transmitting device  100  may set transmission paths by setting activation coils and inactivation coils of the coils  1211  to  1216 . In other words, the wireless power transmitting device  100  may set the transmission paths by activating a first portion of the coils  1211  to  1216  while deactivating a second portion of the coils  1211  to  1216 . 
     In operation  1140 , the wireless power transmitting device  100  may detect that the obstacle has moved to the first section. When it is determined that the obstacle has moved to the first section, in operation  1150 , the wireless power transmitting device  100  may wirelessly transmit power for the first section around the wireless power transmitting device  100  through the second path. The wireless power transmitting device  100  may determine that a third obstacle  1260  is present at the location where the fifth magnetic coupling  1235  is formed. The wireless power transmitting device  100  may determine a power transmission path, depending on the location of an obstacle in the charging section, and for example, it can control the circuits so as not to form the fifth magnetic coupling  1235  by not applying current to the fifth coil  1215 . Accordingly, the wireless power transmitting device  100  may wirelessly transmit power, using a second power transmission path corresponding to the first magnetic coupling  1231  to the fourth magnetic coupling  1234 , and the sixth magnetic coupling  1236 . 
     Referring to  FIG. 13 , the wireless power transmitting device  100  according to an embodiment may include a plurality of patch antennas  1311  to  1326 . The configuration, shapes, number, and layout of patch antennas  1311  to  1326  are not limited to what is shown in  FIG. 13  as long as they can generate an RF wave  1321  or  1322 . At least one of the amplitude and phase of RF waves generated by the patch antennas  1311  to  1326  may be adjusted by a processor  102  of the wireless power transmitting device  100 . For the convenience of description, RF waves that are generated by the patch antennas  1311  to  1326  are referred to as sub-RF waves. In an embodiment, the wireless power transmitting device  100  may adjust at least one of the amplitude and phase of the sub-RF waves generated by the patch antennas  1311  to  1326 . The sub-RF waves may interfere with each other. For example, the sub-RF waves may constructively interfere with each other at any one point and may destructively interfere with each other at another point. The wireless power transmitting device  100  may control at least one of the phase and amplitude of electrical signals input to the patch antennas  1311  and  1326  so that the sub-RF waves interfere constructively with each other at the position of the reception patch antenna of the TV  151 . The wireless power transmitting device  100  may determine that an obstacle  1330  is positioned on the path of a beam-formed RF wave  1321 . The wireless power transmitting device  100  may control at least one of the phase and amplitude of electrical signals input to the patch antennas  1311  and  1326  so that the RF wave  1330  is formed, avoiding the obstacle  1330 . The RF wave  1322 , for example, may be reflected from a structure  1340  (e.g., a wall, a column, furniture, etc.) around the TV  151  and constructively interfered at the position of the reception patch antenna of the TV  151 . For example, the wireless power transmitting device  100  may determine the degree of adjustment of at least one of the phase and amplitude of electrical signals, which are input to the patch antennas  1311  to  1326  to form the RF wave  1322 , based on detection of the obstacle  1330  in a surrounding section of the charging section. When it is detected that the obstacle  1330  has entered the charging section, the wireless power transmitting device  100  may adjust at least one of the phase and amplitude of electrical signals input to the patch antennas  1311  and  1326  so that the sub-RF wave  1322  is formed. 
       FIG. 14  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. 
     In operation  1410 , the wireless power transmitting device  100  according to an embodiment may wirelessly transmit power for the first section (e.g., the charging section) around the wireless power transmitting device  100 . In operation  1420 , the wireless power transmitting device  100  may detect an obstacle showing in the second section (e.g., a surrounding section) around the wireless power transmitting device  100 . When an obstacle is detected in the second section, in operation  1430 , the wireless power transmitting device  100  may determine the type of the obstacle. In operation  1440 , the wireless power transmitting device  100  may detect that the obstacle has moved to the first section. In operation  1450 , the wireless power transmitting device  100  may determine whether the obstacle is a living body. For example, the wireless power transmitting device  100  may obtain an image of at least one of the first section and the second section, and detect a presence of an obstacle in accordance with an analyzed result. The wireless power transmitting device  100  may determine that the kind of the obstacle is a living body (e.g., a person, an animal, etc.), a moving device, or a moving object by applying various object recognition algorithms to the image. When it is determined that an obstacle is a living body, in operation  1460 , the wireless power transmitting device  100  may perform a first operation corresponding to detection of a living body in the first section. For example, the wireless power transmitting device  100  may reduce the intensity of the power that is transmitted under intensity determined by rules etc. When it is determined that an obstacle is not a living body, in operation  1470 , the wireless power transmitting device  100  may perform a second operation corresponding to non-detection of a living body in the first section. When an obstacle exists in the charging section, the efficiency of wireless power transmission/reception may be reduced. Accordingly, the wireless power transmitting device  100  may increase the intensity of the power that is transmitted so that the electronic device  150  may receive sufficient intensity of power even if an obstacle is present. 
       FIG. 15  is a diagram illustrating a surrounding section divided in a plurality of detection sections according to an embodiment. 
     Referring to  FIG. 15 , the wireless power transmitting device  100  may define a plurality of detection sections  1501  and  1502  around a charging section  1503 . When an obstacle is detected in any one of the first detection section  1501 , the second detection section  1502 , and the charging section  1503 , the wireless power transmitting device  100  may perform operations respectively set (e.g., defined, predefined, designated, etc.) for the sections. The wireless power transmitting device  100  may set in advance a first threshold value ( 1 ) for detecting an obstacle entering the first detection section  1501 , a second threshold value ( 2 ) for detecting an obstacle entering the second detection section  1502 , and a third threshold value ( 3 ) for detecting an obstacle entering the charging section  1503 . The first threshold value ( 1 ) to the third threshold value ( 3 ) may have various units, depending on the detection methods. For example, in a method of detecting an obstacle based on the characteristics of a reflected wave, first threshold value ( 1 ) to the third threshold value ( 3 ) may have units (e.g., dB, rad, and seconds) related to the characteristics of a reflected wave, but the types of units are not limited thereto. For example, when an obstacle is detected in the first detection section  1501 , the wireless power transmitting device  100  may output a warning by turning on an LED having a first color and reduce the intensity of the power that is transmitted by about 20%. For example, when an obstacle is detected in the second detection section  1502 , the wireless power transmitting device  100  may output a warning by turning on an LED having a second color and reduce the intensity of the power that is transmitted by about 30%. The wireless power transmitting device  100  may further output an additional aural warning. For example, when an obstacle is detected in the charging section  1503 , the wireless power transmitting device  100  may output a warning by turning on an LED having a third color and reduce the intensity of the power that is transmitted by about 50%. The wireless power transmitting device  100  may further output an additional aural warning with larger volume. When the obstacle stays in the charging section  1503  over a predetermined threshold value, the wireless power transmitting device  100  may control the electronic device  150  to receive power from a substitute power supply such as a batter in the electronic device  150  and stop wireless transmission of power. When the obstacle moves away from the charging section  1503 , the wireless power transmitting device  100  may change the colors of the LEDs in an opposite order or entry or reduce the volume of the aural warning. 
       FIG. 16A  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. The embodiment shown in  FIG. 16A  is described in more detail with reference to  FIG. 16B .  FIG. 16B  is a diagram illustrating division of a first section and a second section according to various embodiments. 
     In operation  1610 , the wireless power transmitting device  100  according to an embodiment may obtain the state of the electronic device  150 . In operation  1620 , the wireless power transmitting device  100  may determine a first section and a second section based on the state of the electronic device  150 . In operation  1630 , the wireless power transmitting device  100  may monitor an object showing in the second section. For example, referring to  FIG. 16B , the wireless power transmitting device  100  may set (i.e., define, designate, etc.) the first section and the second section based on first division lines  1651  and  1652  when the state of the electronic device  150  is a first state. When the wireless power transmitting device  100  sets the first section and the second section by analyzing an image, it can set a first-size section based on an electronic device identified in the image as the first section and a second-size section around the first section as the second section. When the wireless power transmitting device  100  sets the first section and the second section based on the characteristics of a reflected wave, it can set the first section and the second section by setting a first threshold value corresponding to the first division lines  1651  and  1652 . The wireless power transmitting device  100  may set the first section and the second section based on second division lines  1661  and  1662  and when the state of the electronic device  150  is a second state. When the wireless power transmitting device  100  sets the first section and the second section by analyzing an image, it may set a third-size section based on an electronic device identified in the image as the first section and a fourth-size section around the first section as the second section. When the wireless power transmitting device  100  sets the first section and the second section based on the characteristics of a reflected wave, it may set the first section and the second section by setting a second threshold value corresponding to the second division lines  1661  and  1662 . For example, the wireless power transmitting device  100  may set the first section to be relatively wide when a TV is in a display state, and set the first section to be relatively narrow when the TV is in a standby state. 
     In various embodiments, the wireless power transmitting device  100  may adjust the boundaries of the sections when the state is changed. For example, the wireless power transmitting device  100  may recognize that the device to be charged has been changed (e.g., replaced by another device), and in this case, the wireless power transmitting device  100  may recognize that larger power should be transmitted. In order to secure safety of a user, the wireless power transmitting device  100  may set the first section to be wider, that is, the wireless power transmitting device  100  may adjust the boundary lines for setting the first section and the second section from each other. Further, the wireless power transmitting device  100  may also change the boundary line of the second section. When it is required to transmit relatively larger intensity of power, the wireless power transmitting device  100  may set the second section to be wider, and accordingly, it may adjust the boundary line for setting the second section. Accordingly, when the wireless power transmitting device  100  transmits relatively larger intensity of power, a user may check a warning message in advance from a farther distance. 
     For example, the wireless power transmitting device  100  may set the first section to be relatively wide when the intensity of the power that is transmitted is relatively large, and set the first section to be relatively narrow when the intensity of the power that is transmitted is relatively small. Further, as described above, the wireless power transmitting device  100  may also set the second section to be relatively wide when the intensity of the power that is transmitted is relatively large, and set the second section to be relatively narrow when the intensity of the power that is transmitted is relatively small. When the intensity of the power that is transmitted is changed, the wireless power transmitting device  100  may adjust the sizes of the first section and the second section in real time, that is, adjust the boundary line for setting the first section and the boundary line for setting the second section. When the device that requires charging is changed (e.g., replaced with another device to be charged), the wireless power transmitting device  100  may adjust the sizes of the first section and the second section in real time, that is, adjust the boundary line for setting the first section and the boundary line for setting the second section. Alternatively, when the status of the device to be charged is changed, that is, when the amount of power to be consumed is changed, the wireless power transmitting device  100  may adjust the sizes of the first section and the second section in real time, that is, adjust the boundary line for setting the first section and the boundary line for setting the second section. 
     In an embodiment, the wireless power transmitting device  100  may set only the first section without setting the second section, depending on the intensity of the power that is transmitted. For example, when the intensity of the power that is transmitted is a predetermined reference value or more, the wireless power transmitting device  100  may set only the first section. In this case, the wireless power transmitting device  100  may be configured to immediately set the intensity of the power that is transmitted when it is estimated that a living body enters the first section. 
     In an embodiment, the wireless power transmitting device  100  may set additionally set a third section other than the first section and the second section, depending on the intensity of the power that is transmitted. For example, the wireless power transmitting device  100  may set the section outside the second section as the third section. That is, the third section may be a section where a relatively small magnitude of magnetic field is detected in comparison to the second section when the wireless power transmitting device  100  transmits power. The wireless power transmitting device  100  may additionally set the third section when the intensity of the power that is transmitted is the predetermined reference value or more. In this case, when an object is detected in the third section, the wireless power transmitting device  100  may determine the possibility (e.g., likelihood, mathematical possibility, etc.) that the object enters the second section or an estimated stay time, which will be described in more detail with reference to  FIG. 17 . When an object is in the third section, the wireless power transmitting device  100  may adjust the intensity of the power that is transmitted, based on the determined result. When the object enters the second section, the wireless power transmitting device  100  may determine the possibility that the object enters the first section or estimated stay time. When an object is in the second section, the wireless power transmitting device  100  may adjust the intensity of the power that is transmitted, based on the determined result. That is, when the intensity of the power that is transmitted is relatively large, the wireless power transmitting device  100  may adjust the intensity of the power that is transmitted step by step in correspondence to the location of the object by setting more sections for adjusting the intensity of the power. 
     In an embodiment, when detecting that the object is positioned in a specific section, the wireless power transmitting device  100  may adjust the intensity of the power that is transmitted or output a warning message (e.g., visual message or a voice warning). The wireless power transmitting device  100  may change the corresponding operations, depending on the intensity of the power that is transmitted. For example, when the intensity of the power that is transmitted is the predetermined reference value or more and an object is detected in the second section, the wireless power transmitting device  100  may adjust the intensity of the power that is transmitted. For example, when the intensity of the power that is transmitted is less than the predetermined reference value and an object is detected in the second section, the wireless power transmitting device  100  may output a warning message. In another example, the wireless power transmitting device  100  may change the degree of adjusting the power, depending on the intensity of the power that is transmitted. For example, when an object is detected in the second section while the wireless power transmitting device  100  transmits relatively large intensity of power, the wireless power transmitting device  100  may adjust the intensity of the power that is transmitted to be relatively large. For example, when an object is detected in the second section while the wireless power transmitting device  100  transmits relatively small intensity of power, the wireless power transmitting device  100  may adjust the intensity of the power that is transmitted to be relatively small. In another example, the wireless power transmitting device  100  may change the kind or the output magnitude of the warning message, depending on the intensity of the power that is transmitted. For example, when an object is detected in the second section while the wireless power transmitting device  100  transmits relatively large intensity of power, the wireless power transmitting device  100  may output a relatively large voice warning. When an object is detected in the second section while the wireless power transmitting device  100  transmits relatively small intensity of power, the wireless power transmitting device  100  may output a relatively small voice warning. 
       FIG. 17  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. 
     In operation  1710 , the wireless power transmitting device  100  according to an embodiment may wirelessly transmit power for the first section (e.g., the charging section) around the wireless power transmitting device  100 . In operation  1720 , the wireless power transmitting device  100  may detect an obstacle showing in the second section (e.g., a surrounding section) around the wireless power transmitting device  100 . In operation  1730 , the wireless power transmitting device  100  may calculate at least one of the possibility that the obstacle enters the first section or estimated time of stay in the first section. For example, the wireless power transmitting device  100  may analyze motions of a human included in an image based on a plurality of image frames, and calculate at least one of the possibility of entering the first section or the estimated time of stay in the first section based on the analyzed motions. The wireless power transmitting device  100  may also identify as user recognized in the image and can calculate at least one of the possibility of entering the first section or the estimated stay time in the first section based on the user&#39;s electronic device using pattern. In operation  1740 , the wireless power transmitting device  100  can perform a first operation corresponding to detection of an obstacle in the second section based on the calculated result. For example, the possibility of entering the first section is relatively low, the wireless power transmitting device  100  may decrease relatively much the intensity of the power that is transmitted. For example, when the possibility of an obstacle entering the first section is relatively high, the wireless power transmitting device  100  may decrease, by a relatively small degree, the intensity of the power that is transmitted. For example, when the estimated time of stay in the first section is relatively short, the wireless power transmitting device  100  may decrease, by a relatively small degree, the intensity of the power that is transmitted. As another example, when the estimated time of stay in the first section is relatively long, the wireless power transmitting device  100  may decrease, by a relatively large degree, the intensity of the power that is transmitted. In operation  1750 , the wireless power transmitting device  100  may determine whether the obstacle has entered the first section. When it is determined that the obstacle has entered the first section, in operation  1760 , the wireless power transmitting device  100  may perform a second operation in accordance with the estimated time of stay. For example, when the estimated time of stay in the first section is relatively short, the wireless power transmitting device  100  may decrease, by a relatively small degree, the intensity of the power that is transmitted. In another example, when the estimated stay time in the first section is relatively long, the wireless power transmitting device  100  may decrease, by a relatively high degree, the intensity of the power that is transmitted. 
       FIG. 18  is a diagram illustrating a TV, a wireless power transmitting device, and a media data receiving device according to an embodiment. 
     Referring to  FIG. 18 , a wireless power transmitting device  1802 , for example, may form a magnetic coupling  1803  with a TV  1801 , and accordingly, it may wirelessly transmit power. A media data transmitting device  1805  may transmit media data  1821  to the TV  1801 . The TV  1801  may process and display the media data  1821  on a display, using power received from the wireless power transmitting device  1802 . The media data transmitting device  1805  may receive data from various peripheral devices such as a computer  1806 , a video game console  1807 , and set-top box  1808 , and may create and transmit media data  1821  by processing the data. In an embodiment, the wireless power transmitting device  1802  and the media data transmitting device  1805  may be implemented as different pieces of hardware, as shown in  FIG. 18 , but the wireless power transmitting device  1802  and the media data transmitting device  1805  may be included in one housing. Although the location where the magnetic coupling  1803  is formed and the location where the media data  1821  is transmitted are different in the figure, this is for the convenience of description, and the location where the magnetic coupling  1803  is formed and the location where the media data  1821  is transmitted may be different or the same. The media data transmitting device  1805  may transmit the media data  1821  of an image quality of  8 K, for example, using a communication scheme defined by WiGig. The WiGig communication scheme corresponds to a frequency of 60 GHz, the media data transmitting device  1805  may transmit data at a speed of 6 Gbps, so it is possible to create the media data  1821  by compressing the data at a compression rate of 10:1 in order to transmit the media data  1821  of an image quality of  8 K. The wireless power transmitting device  1802  may transmit power of 150 W when the TV  1801  is a 40-inch display and transmit power of 250 W when the TV is a 60-inch display. When an obstacle such as a human is present between the media data transmitting device  1805  and the TV  1801 , the media data  1821  may influence the living body and the transmission speed of the media data  1821  may be reduced. For example, when the distance between media data transmitting device  1805  and the TV  1801  is 2-3 m, propagation delay and a reflection loss of 10 dB may be generated. The configuration that the wireless power transmitting device  1802  changes the transmission conditions of power was described above. The media data transmitting device  1805  may change the transmission condition of the media data  1821  when an obstacle is detected in at least one of a first section and a second section. The first section may be a section where the size of the media data  1821  exceeds a first threshold value and the second section may be a section around the first section, for example, where the size of the media data  1821  exceeds a second threshold value and is the first threshold value or less. 
       FIG. 19  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. A wireless power transmitting device  100  according to an embodiment, for example, may include a media data transmitting device (e.g., the media data transmitting device  1805 ), and accordingly, the media data transmitting device may wirelessly transmit power and media data too. 
     In operation  1910 , the wireless power transmitting device  100  according to an embodiment may wirelessly transmit media data for a first section around the wireless power transmitting device  100 . In operation  1920 , the wireless power transmitting device  100  may detect an obstacle showing in a second section around the wireless power transmitting device, for example, a second section around the first section. As described above, the wireless power transmitting device  100 , the electronic device  150 , or another electronic device may detect an obstacle showing in the second section or the first section, and the wireless power transmitting device  100  may receive the result of detecting an obstacle by communicating with the electronic device  150  or another electronic device. When an obstacle is detected in the second section, in operation  1930 , the wireless power transmitting device  100  may determine adjustment information of media data transmission condition. For example, the adjustment information of a media data transmission condition may include adjustment information of at least one of a beam-forming condition, a transmission frequency, a compression rate, the number of frames, or a play speed. In operation  1940 , the wireless power transmitting device  100  may determine that the obstacle moves to the first section. When it is determined that the obstacle has moved to the first section, in operation  1950 , the wireless power transmitting device  100  may adjust a media signal transmission condition based on the determined adjustment information. 
       FIG. 20  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. 
     In operation  2010 , the wireless power transmitting device  100  according to an embodiment may detect whether the obstacle has moved to a first section. In operation  2020 , the wireless power transmitting device  100  may change at least one of a beam-forming condition of media data, the transmission frequency of the media data, the compression rate of the media data, the number of frames of the media data, and the playback speed of the media data. For example, the wireless power transmitting device  100  may change the beam-forming condition such that media data is transmitted and avoiding the location of the obstacle. When an obstacle is detected in a second section, the wireless power transmitting device  100  may determine appropriate beam-forming transmission condition and beam-forming reception condition, and when an obstacle is detected in the first section, the wireless power transmitting device  100  may transmit media data under the determined beam-forming condition. The wireless power transmitting device  100  may transmit the determined beam-forming condition to the electronic device  150  and the electronic device  150  can receive media data based on the received beam-forming condition. For example, the wireless power transmitting device  100  may use another communication scheme (e.g., Wi-Fi communication scheme or Bluetooth communication scheme) by decreasing the frequency of the media data or increase the compression rate of the media data. Accordingly, the image quality of the media data may be slightly deteriorated, but the media data may be stably supplied. For example, the wireless power transmitting device  100  may transmit only some of the frame of the media data. When the media data of the wireless power transmitting device  100  is compressed, for example, in an inter-prediction scheme, the wireless power transmitting device  100  may transmit only some frames such as I-frames to the electronic device  150 . The electronic device  150  may reproduce a moving image (i.e., movie), using the received partial frames and reproduce a moving image by inserting the received partial frames for the time corresponding to the non-received frames (e.g., missing frames). For example, the wireless power transmitting device  100  may adjust the playback speed of the media data. The wireless power transmitting device  100  may transmit the media data at a relatively low speed, and in this case, a moving image may be played relatively slowly in the electronic device  150 . 
     In an embodiment, the wireless power transmitting device  100  may transmit media data through a detour path. For example, the wireless power transmitting device  100  may transmit media data to another electronic device (e.g., a relay device) that can transmit media data to the electronic device  150 , and in this case, another electronic device may transmit the media data to the electronic device  150 . 
       FIG. 21  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. 
     In operation  2110 , the wireless power transmitting device  100  according to an embodiment may detect movement of an obstacle. For example, the wireless power transmitting device  100  may detect an obstacle moving in a surrounding section of a first section. The wireless power transmitting device  100  may estimate the stay time of an obstacle in the first section in operation  2120 . For example, the wireless power transmitting device  100  may detect movement of an obstacle in a plurality of image frames of the obstacle and calculate the speed of the obstacle, using the degree of movement of the obstacle according to time. The wireless power transmitting device  100  may estimate the time of stay, for example, based on the calculated speed. Alternatively, the wireless power transmitting device  100  may determine the speed of the obstacle through various methods, not the method of using an image, and may estimate the time of stay based on the found speed in methods other than the method of using an image. Alternatively, the wireless power transmitting device  100  may identify the obstacle, using an image of the obstacle. The wireless power transmitting device  100  may estimate the stay time of the obstacle based on the identified information. For example, the wireless power transmitting device  100  may store in advance related information between the identified information and the time of stay in the first section, as shown in Table 3. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 3 
               
               
                   
                   
               
               
                   
                 Identified information 
                 Estimate stay time 
               
               
                   
                   
               
             
            
               
                   
                 Tom 
                  3 sec 
               
               
                   
                 Robot vacuum cleaner 
                 10 sec 
               
               
                   
                 Jane 
                 20 sec 
               
               
                   
                   
               
            
           
         
       
     
     As in Table 3, the wireless power transmitting device  100  may obtain the related information by checking the existing stay times of obstacles in the first section and collecting statistics of the stay times, and update the related information. 
     In operation  2130 , the wireless power transmitting device  100  may detect that the obstacle moves into the first section. When it is detected that the obstacle has moved into the first section, in operation  2140 , the wireless power transmitting device  100  may perform an operation corresponding to the estimated stay time. For example, when the estimated stay time is in a first range, the wireless power transmitting device  100  may adjust beam-forming of media data. For example, when the estimated stay time is in a second range, the wireless power transmitting device  100  may change the transmission frequency of media data. For example, when the estimated time of stay is in a third range, the wireless power transmitting device  100  may transmit only some of the frames of media data. For example, when the estimated time of stay is in a fourth range, the wireless power transmitting device  100  may stop power transmission while controlling the electronic device  150  to receive power from another power supply. For example, when the estimated time of stay is in a fifth range, the wireless power transmitting device  100  may output a warning message. When the estimated time of stay is in any one range, the wireless power transmitting device  100  may simultaneously perform two or more of the various operations described above. 
     The wireless power transmitting device  100  according to an embodiment may measure the actual stay time of an obstacle in the first section and may perform an operation corresponding to the measured time. 
       FIG. 22  is a flowchart illustrating a method of operating a wireless power transmitting device according to an embodiment. 
     In operation  2210 , the wireless power transmitting device  100  according to an embodiment may detect movement of an obstacle. For example, the wireless power transmitting device  100  may detect an obstacle moving in a surrounding section of a first section. The wireless power transmitting device  100  may estimate a movement pattern of an obstacle in the first section in operation  2220 . For example, the wireless power transmitting device  100  may analyze a plurality of image frames of an obstacle and estimate the movement pattern of the obstacle on the analyzed result. The wireless power transmitting device  100  may determine the movement direction of an obstacle around the first section and estimate the movement direction of the obstacle in the first section. The wireless power transmitting device  100  may identify the obstacle from an image of the obstacle and estimate the movement pattern based on the identified result. The wireless power transmitting device  100  may estimate the movement pattern of an object, using various movement or behavior estimation algorithms. The wireless power transmitting device  100  may store in advance related information between identified result and a movement pattern and estimate a movement pattern based on the related information. In operation  2230 , the wireless power transmitting device  100  may determine that the obstacle moves to the first section. When it is determined that the obstacle has moved to the first section, in operation  2240 , the wireless power transmitting device  100  may perform an operation corresponding to an estimated movement pattern. 
     The wireless power transmitting device  100  according to an embodiment may measure the actual time of stay of an obstacle in the first section and may perform an operation corresponding to the measured time. 
     Each of elements of the wireless power transmission device or electronic device according to the present disclosure may be implemented by one or more components and the name of the corresponding element may vary depending on the type of the electronic device. In an embodiment, the inspection apparatus may include at least one of the above-described elements. Some of the above-described elements may be omitted from the electronic device, or the inspection apparatus may further include additional elements. Further, some of the components of the electronic device according to the various embodiments may be combined to form a single entity, and thus, may equivalently execute functions of the corresponding elements prior to the combination. 
     The term “module” as used herein may, for example, mean a unit including one of hardware, software, and firmware or a combination of two or more of them. The “module” may be interchangeably used with, for example, the term “unit”, “logic”, “logical block”, “component”, or “circuit”. The “module” may be a minimum unit of an integrated component element or a part thereof. The “module” may be a minimum unit for performing one or more functions or a part thereof. The “module” may be mechanically or electronically implemented. For example, the “module” according to the present disclosure may include at least one of an application-specific integrated circuit (ASIC) chip, a field-programmable gate arrays (FPGAs), and a programmable-logic device for performing operations which has been known or are to be developed hereinafter. 
     According to an embodiment, at least some of the devices (e.g., modules or functions thereof) or the method (e.g., operations) according to the present disclosure may be implemented by a command stored in a computer-readable storage medium in a programming module form. When the command is executed by one or more processors, the one or more processors may perform a function corresponding to the command. The computer-readable storage medium may be, for example, the memory. 
     According to an embodiment, a storage media may store instructions, in which the commands are set to make at least one processor perform at least one operation when the commands are executed by the processor. The operations may include: an operation of wirelessly transmitting power for a first section around the wireless power transmitting device; an operation of performing a predetermined first operation when an obstacle is detected in a second section around the first section; and an operation of performing a predetermined second operation when it is detected that the obstacle enters the first section. 
     The commands may be stored in an external server or may be downloaded and installed in an electronic device such as a wireless power transmitting device. That is, an external server according to various embodiments can store commands that a wireless power transmitting device can download. 
     The computer-readable recoding medium may include a hard disk, a floppy disk, magnetic media (e.g., a magnetic tape), optical media (e.g., a compact disc read-only memory (CD-ROM) and a digital versatile disc (DVD)), magneto-optical media (e.g., a floptical disk), a hardware device (e.g., a read-only memory (ROM), a random access memory (RAM), a flash memory, etc.), and the like. In addition, the program instructions may include high-level language codes, which can be executed in a computer by using an interpreter, as well as machine codes generated by a compiler. The aforementioned hardware device may be configured to operate as one or more software modules in order to perform the operation of the present disclosure, and vice versa. 
     The programming module according to the present disclosure may include one or more of the aforementioned components or may further include other additional components, or some of the aforementioned components may be omitted. Operations executed by a module, a programming module, or other component elements according to various embodiments may be executed sequentially, in parallel, repeatedly, or in a heuristic manner. Furthermore, some operations may be executed in a different order or may be omitted, or other operations may be added. 
     Various embodiments disclosed herein are provided merely to easily describe technical details of the present disclosure and to help the understanding of the present disclosure, and are not intended to limit the scope of the present disclosure. Therefore, it should be construed that all modifications and changes or modified and changed forms based on the technical idea of the present disclosure fall within the scope of the present disclosure.