Electronic device having structure for supporting wireless charging

Abstract

This wireless charging structure for wireless charging may comprise: an insulating substrate; a coil including a plurality of wires; a first conductive pad electrically connected to one end portions of the plurality of wires; and a second conductive pad electrically connected to the other end portions of the plurality of wires. The plurality of wires may be formed on one surface of the insulating substrate in a winding structure in which the wires are wound multiple times in a clockwise or counterclockwise direction around a first axis perpendicular to the insulating substrate. The plurality of wires may include at least one round wire having a round cross-section and at least one rectangular wire having a rectangular cross-section. The wireless charging structure may be applied to a portable power reception device (e.g., a smartphone) or a power supply device (e.g., a wireless charging pad).

Description

Electronic device having a structure to support wireless charging

[0001] The present disclosure relates to an electronic device having a structure for supporting wireless charging.

[0002] A battery can be wirelessly charged using a coil in a wireless charging system. For example, the wireless charging system may include a power supply device (e.g., a charging pad or a charging cradle) having a transmitting coil and a power reception device (e.g., a smartphone, a smart watch, a wireless earphone charging case (or a cradle)) having a receiving coil. When the axis of the transmitting coil is aligned with the axis of the receiving coil, the two coils can be electrically coupled, and thus power can be transferred from the transmitting coil to the receiving coil. The power reception device can charge the battery using power received from the power supply device through the receiving coil.

[0003] The above information is provided as background information to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above is applicable as prior art related to the present disclosure.

[0004] The transmitting coil and / or the receiving coil may include a wire having a rectangular cross-section or a wire having a circular cross-section. As the frequency of the current flowing through the rectangular wire increases, a phenomenon in which the current density is concentrated around the outer perimeter of the rectangular wire (e.g., the skin effect or the proximity effect) may occur. For example, when the frequency increases from a low frequency band (e.g., about 100 KHz) to a high frequency band (e.g., about 2 MHz), the aforementioned phenomenon may occur in the rectangular wire. As a result, the effective area through which the current flows may decrease and power loss may increase. A circular wire, although less susceptible to the aforementioned phenomenon, has a smaller cross-section than a rectangular wire. Therefore, power loss in the circular wire may increase as the frequency increases.

[0005] Wireless charging structures according to various embodiments can improve power transmission or reception efficiency in high-frequency bands. Wireless charging structures according to various embodiments can be applied to power receiving devices and / or power supply devices. The technical problems to be solved by the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present disclosure pertains from the description below.

[0006] According to one embodiment, a wireless charging structure for wireless charging may include an insulating substrate; a coil including a plurality of wires; a first conductive pad electrically connected to one end of the plurality of wires; and a second conductive pad electrically connected to the other end of the plurality of wires. The plurality of wires may be formed on one surface of the insulating substrate in a winding structure in which the plurality of wires are wound multiple times clockwise or counterclockwise around a first axis perpendicular to the insulating substrate. The plurality of wires may include at least one circular wire having a circular cross-section and at least one rectangular wire having a rectangular cross-section.

[0007] The plurality of wires may be arranged in a single layer on the one surface of the insulating substrate when viewed in a second axial direction parallel to the first axis. The coil may include two or more rectangular wires. The at least one circular wire may be located at an edge of the two or more rectangular wires, not between the two or more rectangular wires. The coil may include two or more circular wires. At least one circular wire among the two or more circular wires may be arranged at a left edge of the two or more rectangular wires when viewed in the two-axis direction. The remaining circular wire among the two or more circular wires may be arranged at a right edge of the two or more rectangular wires when viewed in the two-axis direction.

[0008] The plurality of wires may be arranged in a single layer on the one surface of the insulating substrate when viewed in a second axial direction parallel to the first axis. The coil may include two or more circular wires. The at least one rectangular wire may be located at an edge of the two or more circular wires, not between the two or more circular wires. The coil may include two or more rectangular wires. At least one rectangular wire among the two or more rectangular wires may be arranged at a left edge of the two or more circular wires when viewed in the two-axis direction. The remaining rectangular wire among the two or more rectangular wires may be arranged at a right edge of the two or more circular wires when viewed in the two-axis direction.

[0009] The above plurality of wires may be arranged in a plurality of layers on the one surface of the insulating substrate when viewed in a second axial direction parallel to the insulating substrate.

[0010] The number of circular wires and / or the ratio of the number of circular wires to the total number of wires can be determined based on the frequency of the power signal wirelessly received through the coil or the power signal wirelessly transmitted through the coil.

[0011] According to one embodiment, a portable power receiving device may include a front cover forming a front of the power receiving device; a rear cover forming a rear of the power receiving device; a display disposed between the front cover and the rear cover and visually exposed through the front; a battery disposed between the display and the rear cover; and a wireless charging structure disposed between the battery and the rear cover and configured to charge the battery.

[0012] According to one embodiment, the power supply device may include a front cover forming a front surface of the power supply device; a rear cover forming a rear surface of the power supply device; and a wireless charging structure disposed between the front cover and the rear cover and configured to wirelessly transmit power to a power receiving device.

[0013] According to embodiments of the present disclosure, an electronic device can improve the efficiency of wireless charging. Furthermore, various other benefits, directly or indirectly identified through this document, may be provided.

[0014] FIG. 1 is a block diagram of an electronic device within a network environment according to various embodiments.

[0015] FIG. 2 illustrates a block diagram of a wireless charging system to which a wireless charging structure according to an embodiment of the present disclosure can be applied.

[0016] FIG. 3 illustrates a layout diagram of a transmitting coil of a power supply device and a receiving coil of a power receiving device in the wireless charging system of FIG. 2.

[0017] FIG. 4 is a drawing showing a front view of a wireless charging structure that supports wireless charging according to one embodiment.

[0018] FIG. 5 is a cross-sectional view of a coil in the wireless charging structure of FIG. 4, taken along the AB portion in the z-axis direction, according to one embodiment.

[0019] FIG. 6 is a cross-sectional view of a coil in the wireless charging structure of FIG. 4, taken along the AB portion in the z-axis direction, according to one embodiment.

[0020] FIG. 7 is a cross-sectional view of a coil in the wireless charging structure of FIG. 4, taken along the AB portion in the z-axis direction, according to one embodiment.

[0021] FIG. 8 is a cross-sectional view of a coil in the wireless charging structure of FIG. 4, taken along the AB portion in the z-axis direction, according to one embodiment.

[0022] Fig. 9a is a diagram showing the current distribution in the coil wire when a current of about 100 KHz flows through the coil.

[0023] Figure 9b is a diagram showing the current distribution in the coil wire when a current of about 2 MHz flows through the coil.

[0024] Figure 10a is a graph showing the relationship between frequency and resistance in a coil.

[0025] Figure 10b is a graph showing the relationship between frequency and Q factor in a coil.

[0026] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings so that those skilled in the art can easily implement the present disclosure. However, the present disclosure may be implemented in various different forms and is not limited to the embodiments described herein. In connection with the description of the drawings, the same or similar reference numerals may be used for identical or similar components. Furthermore, in the drawings and related descriptions, descriptions of well-known functions and configurations may be omitted for clarity and conciseness.

[0027] FIG. 1 is a block diagram of an electronic device (101) within a network environment (100) according to various embodiments. Referring to FIG. 1, in the network environment (100), the electronic device (101) may communicate with an electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of an electronic device (104) or a server (108) via a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In some embodiments, the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added. In some embodiments, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0028] The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or calculations. According to one embodiment, as at least a part of the data processing or calculations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or a secondary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor)) that can operate independently or together therewith. For example, if the electronic device (101) includes a main processor (121) and a secondary processor (123), the secondary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a specified function. The secondary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0029] The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0030] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0031] The program (140) may be stored as software in the memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0032] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0033] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0034] The display module (160) can visually provide information to an external party (e.g., a user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. In one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0035] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

[0036] The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0037] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) with an external electronic device (e.g., the electronic device (102)). In one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0038] The connection terminal (178) may include a connector through which the electronic device (101) may be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0039] A haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. In one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0040] The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0041] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least a part of a power management integrated circuit (PMIC).

[0042] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0043] The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (194) (e.g., a local area network (LAN) communication module, or a power line communication module). Among these communication modules, the corresponding communication module can communicate with an external electronic device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0044] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), an external electronic device (e.g., the electronic device (104)), or a network system (e.g., the second network (199)). According to one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0045] The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module (197) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as the first network (198) or the second network (199), may be selected from the plurality of antennas by, for example, the communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. In some embodiments, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (197).

[0046] According to various embodiments, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.

[0047] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0048] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0049] Hereinafter, for convenience of explanation, the surface of the display (e.g., a flexible display or a main display) that is visually exposed to the user may be referred to as the front surface of the electronic device (101). In addition, the surface opposite the front surface may be referred to as the back surface of the electronic device (101). In addition, the surface surrounding the space between the front surface and the back surface may be referred to as the side surface of the electronic device (101). In this document, the term “state” may refer to the structural form, posture, shape, or configuration of the electronic device (101) (or, the display, slider, or housing constituting the electronic device (101).

[0050] A wireless charging structure according to an embodiment of the present disclosure may be applied to an electronic device (e.g., a smart phone, a tablet PC) (101) having a bar-type housing structure. For example, the bar-type housing structure may include a plate (or cover) forming a front surface of the electronic device (101), a plate forming a rear surface of the electronic device (101), and a bezel structure forming a side surface surrounding the front and rear surfaces. A display may be arranged on the front surface.

[0051] A wireless charging structure according to an embodiment of the present disclosure may be applied to an electronic device (e.g., a smart phone, a tablet PC, a notebook PC) (101) having a foldable housing structure. For example, the electronic device (101) may have a foldable housing structure divided into two housings centered on a folding axis. A first display area of ​​a display (e.g., a flexible display) may be arranged in the first housing, and a second display area of ​​the display may be arranged in the second housing. The foldable housing structure may be implemented in an in-folding manner in which the first display area and the second display area face each other when the electronic device (101) is in a folded state. Alternatively, the foldable housing structure may be implemented in an out-folding manner in which the first display area and the second display area face each other when the electronic device (101) is in a folded state. The electronic device may further include a sub-display. For example, the main display, a flexible display, may be placed on the front of the electronic device, and the sub-display may be placed on the back of the electronic device.

[0052] A wireless charging structure according to an embodiment of the present disclosure may be applied to an electronic device (e.g., a smart phone, a tablet PC, a notebook PC) (101) having a slidable (or rollable) housing structure. For example, the electronic device (101) may include a slidable housing including a housing (or a first housing) and a slider (or a second housing), a rail structure (e.g., a rail structure by gear engagement between a rack gear and a pinion gear) that allows the slider to be inserted into the housing and the slider to be extracted from the housing, and a rollable display (e.g., a flexible display). The slider may be divided into a portion that can be inserted into the housing (hereinafter, referred to as an insertion portion) and a portion that remains exposed to the outside. When the slider's inlet portion is fully withdrawn from the housing in a slide-out state (also known as a first state, an open state, an extended state, or a roll-out state), the entire display (or a large portion of the display area) can be exposed to the outside through the front. As the slider's inlet portion is retracted into the housing, the display can also be retracted into the housing. The display can also be divided into a portion that remains exposed to the outside (e.g., a first display area, a first section) and a portion that can be retracted into the housing (e.g., a second display area, a second section, a bendable section). When the entire inlet portion of the slider is switched to a slide-in state (in other words, a second state, a closed state, a reduced state, a roll-in state) in which the entire inlet portion of the slider is inlet into the housing, the entire second display area of ​​the display can be inlet into the housing.In one embodiment, when switching from a slide-out state to a slide-in state, a part of the display (e.g., a second display area) may be moved to the rear side through the side without being retracted into the housing. As exemplified above, the electronic device (101) may have a sliding structure in which a part of the display is retracted into the housing, or a sliding structure in which a part of the display is moved from the front to the rear. In the display, only a part exposed through the front may be determined as an activated display area (hereinafter, “active area”) that displays visual information. A part retracted into the housing or moved to the rear may be determined as an inactive area in which no visual information is displayed. An electronic device having a slideable housing structure may include a separate button for switching states from slide-in to slide-out or vice versa.

[0053] A wireless charging structure according to an embodiment of the present disclosure can be applied to an electronic device (e.g., a smart watch, a smart ring) (101) having a structure that can be worn on a human body.

[0054] The wireless charging structure according to the embodiment of the present disclosure can be applied to a power supply device (e.g., a wireless charging pad) that can wirelessly supply power to an electronic device (101).

[0055] FIG. 2 illustrates a wireless charging system to which a wireless charging structure according to various embodiments of the present disclosure may be applied. FIG. 3 illustrates a layout diagram of a transmitting coil of a power supply device and a receiving coil of a power receiving device in the wireless charging system of FIG. 2.

[0056] Referring to FIG. 2, a power supply device (201) can wirelessly transmit power using a transmission coil. For example, the power supply device (201) may be a wireless charging pad that supplies power received from a first external electronic device (e.g., a travel adapter (TA)) to a second external electronic device (e.g., a power receiving device (202)) through a transmission coil. The power supply device (201) may include a power terminal; a front cover forming a front surface of the wireless charging pad; a rear cover forming a rear surface of the wireless charging pad; a wireless charging structure disposed between the covers and according to an embodiment of the present disclosure; and a power transmission circuit (e.g., an inverter) configured to convert a current of power received from the first external electronic device through the power terminal from direct current (DC) to alternating current (AC) and output the converted current to the wireless charging structure. The power receiving device (202) can wirelessly receive power using a receiving coil when in proximity to the power supply device (201) (e.g., placed on a wireless charging pad) and charge a battery (e.g., battery (189) of FIG. 1) using the received power. The power receiving device (202) can be a portable electronic device having a bar-type housing structure, a foldable housing structure, a sliderable housing structure, or a wearable structure. The power receiving device (202) can include a front cover forming a front of the portable electronic device; a rear cover forming a rear of the portable electronic device; a display disposed between the front cover and the rear cover and visually exposed through the front; a battery disposed between the display and the rear cover; and a wireless charging structure disposed between the battery and the rear cover and according to an embodiment of the present disclosure.

[0057] Referring to FIG. 3, a wireless charging structure including a transmitting coil (301) may be disposed inside a first housing (310) of a power supply device (201). For example, the first housing (310) may include a cover (311) forming a front surface of the power supply device (201) (e.g., a surface on which the power receiving device (202) is mounted) and a cover (312) forming a surface opposite to the front surface (a rear surface). The transmitting coil (301) may be disposed inside the first housing (310) adjacent to the front cover (311). According to one embodiment, the transmitting coil (301) may be a spiral-type coil wound multiple times clockwise or counterclockwise around an axis perpendicular to the front surface (e.g., a z-axis). The wireless charging structure including a receiving coil (302) may be disposed inside a second housing (320) of the power receiving device (202). For example, the second housing (320) may include a cover (321) forming the front side (e.g., the side where the display is exposed) of the power receiving device (202) and a cover (322) forming the back side. The receiving coil (302) may be disposed inside the second housing (320) adjacent to the back cover (322). According to one embodiment, the receiving coil (302) may be a spiral-type coil wound multiple times clockwise or counterclockwise around an axis perpendicular to the back side (e.g., the z-axis). The power receiving device (202) may charge a battery disposed inside the second housing using power received from the power supply device (201) through the receiving coil (302).

[0058] According to one embodiment, the center of the transmitting coil (301) and the center of the receiving coil (302) may be substantially aligned along an axis (A) parallel to the z-axis, thereby increasing power reception efficiency. Although not shown, a magnetic structure may be included in the first housing (310) and the second housing (320) and disposed around the transmitting coil (301) and the receiving coil (302). For example, the magnetic structure on the transmitting coil (301) side and the magnetic structure on the receiving coil (302) side may be configured to exert an attractive force, also known as an attractive force, on each other when the centers of the coils (301, 302) are aligned along the axis (A). Even when an external impact is applied to the two devices (201, 202), the centers of the coils (301, 302) may be maintained in an aligned state without misalignment due to the attractive force acting between the two magnetic structures. Therefore, efficient wireless charging becomes possible.

[0059] According to one embodiment, the transmitting coil (301) may be configured to be thicker than the receiving coil (302). For example, the transmitting coil (301) may be configured with a multilayer structure, and the receiving coil (302) may be configured with a single layer structure. Accordingly, the thickness T1 of the transmitting coil (301) may be greater than the thickness T2 of the receiving coil (302).

[0060] FIG. 4 is a drawing showing a front view of a wireless charging structure (400) supporting wireless charging according to one embodiment. Referring to FIG. 4, the wireless charging structure (400) (e.g., a structure including a transmitting coil (301) of FIG. 3 or a structure including a receiving coil (302) of FIG. 3) may include a coil (410), an insulating substrate (or an insulating layer) (420), a first conductive pad (430), and a second conductive pad (440). At least a portion of the components of the wireless charging structure (400) (e.g., the coil (410) and the insulating substrate (420)) may be formed on a flexible printed circuit board (FPCB). The wireless charging structure (400) may be disposed in a housing of a power supply device (e.g., the first housing (310) of FIG. 3) or in a housing of a power receiving device (e.g., the second housing (320) of FIG. 3).

[0061] The coil (410) (e.g., the transmitting coil (301) or the receiving coil (302)) may be arranged on one surface (421) of the insulating substrate (420) in a structure in which the coil is wound multiple times clockwise and / or counterclockwise around an axis (an axis parallel to the illustrated z-axis direction) (401) perpendicular to the insulating substrate (420). As shown in FIG. 4, the winding structure of the coil (410) is round, but is not limited thereto. For example, at least a portion of the coil (410) may have an angular shape (e.g., a square shape).

[0062] According to one embodiment, one end (411) of the coil (410) may be electrically connected to a first conductive pad (430) formed on a wireless charging structure (400) (e.g., disposed on one side (421) of an insulating substrate (420) or on the other side facing opposite to the one side (421)) via a first conductor (450). The other end (412) of the coil (410) may be electrically connected to a second conductive pad (440) formed on a wireless charging structure (400) (e.g., disposed on one side (421) of an insulating substrate (420) or on the other side)) via a second conductor (460). The conductive pads (430, 440) may be electrically connected to a wireless charging circuit (e.g., a wireless charging module (350) of FIG. 3). The wireless charging circuit can transmit power to an external electronic device or receive power from an external electronic device through the coil (410). For example, in the wireless charging circuit, an alternating current (AC) can flow to the coil (410) through conductive pads (430, 440). The AC can induce a magnetic flux in the coil (410) and form a magnetic field around the wireless charging structure (400). An AC can be induced in the coil (410) by the magnetic flux induced in the coil of the external electronic device. The coil (410) can transmit the induced AC to the wireless charging circuit through the conductive pads (430, 440).

[0063] According to one embodiment, the coil (410) may include multiple strands of wires. One end of the wires (corresponding to one end (411) of the coil (410)) may be connected to a first conductive pad (430). The other end of the wires (corresponding to the other end (412) of the coil (410)) may be connected to a second conductive pad (440). The wires may be arranged on one surface (421) of the insulating substrate (420) in a structure in which the wires are wound multiple times clockwise and / or counterclockwise around an axis (401) perpendicular to the insulating substrate (420) (an axis parallel to the illustrated z-axis direction).

[0064] In one embodiment, the coil (410) may include wires having various cross-sections. For example, the coil (410) may include wires having a circular (or oval) cross-section and wires having a polygonal (e.g., square, trapezoidal, or partially angular and partially round) cross-section. In one embodiment, the number of circular wires in the coil (410) and / or the ratio of the number of circular wires to the total number of wires may be determined based on the frequency of a power signal wirelessly received through the coil (410) or a power signal wirelessly transmitted through the coil (410). For example, the more circular wires included in the coil (410), the higher frequency power signals may be received or transmitted through the coil (410). Various embodiments related to the relative positions between circular wires and rectangular wires and the number of wires are described below.

[0065] FIG. 5 is a cross-sectional view of a coil (410) in the wireless charging structure (400) of FIG. 4, cut along the AB portion in the z-axis direction, according to one embodiment.

[0066] When looking at the cross-sections of the first loop (501) and the second loop (502) of the coil (410) facing the x-axis in FIG. 5, the coil (410) may include a plurality of circular wires (510, 550) and a plurality of rectangular wires (520, 530, 540). In addition, the wires (510, 520, 530, 540, 550) may be arranged on one surface of the insulating substrate (420) in a single layer structure. In addition, the plurality of circular wires (510, 550) may be arranged at the edges of the plurality of rectangular wires (520, 530, 540) rather than between the plurality of rectangular wires (520, 530, 540). For example, in the first loop (501), the square wire portions (521, 531, 541) may be positioned in the center, the first circular wire portion (511) may be positioned at the left edge, and the second circular wire portion (551) may be positioned at the right edge. In the second loop (502), the square wire portions (522, 532, 542) may be positioned in the center, the third circular wire portion (512) may be positioned at the left edge, and the fourth circular wire portion (552) may be positioned at the right edge. The phenomenon in which the current density is concentrated on the outer periphery of the wire (e.g., the skin effect or the proximity effect) may be alleviated in the coil (410) composed of both square and circular wires compared to the coil composed only of square wires. In addition, the coil (410) has a relatively larger cross-sectional area than the coil composed only of circular wires. Accordingly, power loss in a high-frequency band may be reduced, and power transmission or reception efficiency may be increased.

[0067] According to one embodiment, referring to FIG. 5, the width between loops formed on the insulating substrate (420), including the first loop (501) and the second loop (502), may be substantially equal to W1. In addition, the width between wires (510, 520, 530, 540, 550) may also be formed on the insulating substrate (420) to be equal to W2. W1 and W2 may be equal to or different from each other.

[0068] The total number of wires is five, as shown in FIG. 5, but is not limited thereto. For example, the number of square wires may be one, two, or four or more, rather than three. The number of circular wires positioned at the left edge may be two or more, rather than one. The number of circular wires positioned at the right edge may be two or more, rather than one. In one embodiment, the circular wires may be positioned only at the left edge or only at the right edge.

[0069] According to one embodiment, the coil (410) may include at least one circular wire and at least one rectangular wire, and at least one circular wire may be positioned at an edge. For example, when viewed outward from an axis (401) perpendicular to the insulating substrate (420) (an axis parallel to the illustrated z-axis direction), a circular wire among the plurality of wires of the coil (410) may be positioned at an edge in the outward direction.

[0070] In one embodiment, the circular wires are shown in FIG. 5 as being positioned on both left and right edges of the rectangular wires, but this is not limiting. For example, one or more circular wires may be positioned only on the left or only on the right side of one or more rectangular wires.

[0071] In one embodiment, although not shown, the wires (510, 520, 530, 540, 550) in the coil (410) may be coated with a coating member. For example, the coil (410) may be composed of a first conductive material (e.g., copper) and the coating member may be composed of a second conductive material. For example, the second conductive material may include at least one of iron, nickel, cobalt, or an alloy (e.g., nanocrystal). A non-conductive material (e.g., polymer or ceramic ferrite) may also be used as the coating member.

[0072] FIG. 6 is a cross-sectional view of a coil (410) in the wireless charging structure (400) of FIG. 4, cut along the AB portion in the z-axis direction, according to one embodiment.

[0073] Looking at the cross-section of the first loop (601) and the second loop (602) of the coil (410) facing the x-axis direction in FIG. 6, the coil (410) may include a plurality of circular wires (610, 650, 660, 697) and a plurality of rectangular wires (620, 630, 640, 670, 680, 690). In addition, the wires (610, 620, 630, 640, 650, 660, 670, 680, 690, 697) may be arranged on one surface of the insulating substrate (420) in a multilayer structure. For example, a first set of wires (610, 620, 630, 640, 650) may be arranged on the first layer and a second set of wires (660, 670, 680, 690, 697) may be arranged on the second layer. In addition, a plurality of circular wires (610, 650, 660, 697) may be arranged at the edges of a plurality of rectangular wires (620, 630, 640, 670, 680, 690) rather than between a plurality of rectangular wires (620, 630, 640, 670, 680, 690). For example, in the first loop (601), the square wire portions (621, 631, 641, 671, 681, 691) may be positioned in the center, the first circular wire portion (611) and the second circular wire portion (661) may be positioned at the left edge, and the third circular wire portion (651) and the fourth circular wire portion (698) may be positioned at the right edge. In the second loop (602), the square wire portions (622, 632, 642, 672, 682, 692) may be positioned in the center, the fifth circular wire portion (612) and the sixth circular wire portion (662) may be positioned at the left edge, and the seventh circular wire portion (652) and the eighth circular wire portion (699) may be positioned at the right edge.

[0074] Referring to FIG. 6, the width between loops formed on the insulating substrate (420), including the first loop (601) and the second loop (602), may be equal to W1 (see FIG. 5). In addition, the width between wires (610, 620, 630, 640, 650, 660, 670, 680, 690, 697) in each layer may also be equal to W2 (see FIG. 5) and formed on the insulating substrate (420). W1 and W2 may be equal to or different from each other.

[0075] The number of layers is illustrated as two in FIG. 6, but is not limited thereto, and may be three or more. The total number of wires is illustrated as ten in FIG. 6, but is not limited thereto. For example, the number of square wires may be six or more or less. The number of circular wires arranged at the left edge of each layer may be two or more, rather than one. The number of circular irons arranged at the right edge of each layer may be two or more, rather than one.

[0076] Although the circular wires are depicted in FIG. 6 as being positioned on both left and right edges of the rectangular wires, this is not a limitation. For example, one or more circular wires may be positioned only on the left or only on the right side of one or more rectangular wires.

[0077] Although not shown, the wires (610, 620, 630, 640, 650, 660, 670, 680, 690, 697) in the coil (410) may be covered with a coating member.

[0078] FIG. 7 is a cross-sectional view of a coil (410) in the wireless charging structure (400) of FIG. 4, cut along the AB portion in the z-axis direction, according to one embodiment.

[0079] Looking at the cross-sections of the first loop (701) and the second loop (702) of the coil (410) facing the x-axis direction in FIG. 7, the coil (410) may include a plurality of circular wires (710, 730, 750, 770) and a plurality of rectangular wires (720, 740, 760). In addition, the wires (710, 720, 730, 740, 750, 760, 770) may be arranged on one surface of the insulating substrate (420) in a single layer structure. In addition, the plurality of circular wires (710, 730, 750, 770) and the plurality of rectangular wires (720, 750, 76040) may be arranged alternately. For example, in the first loop (701), square wire portions (721, 741, 761) may be positioned between circular wire portions (711, 731, 751, 771). In the second loop (702), square wire portions (722, 742, 762) may be positioned between circular wire portions (712, 732, 752, 772).

[0080] Referring to FIG. 7, the width between loops formed on the insulating substrate (420), including the first loop (701) and the second loop (702), may be equal to W1 (see FIG. 5). In addition, the width between wires (710, 720, 730, 740, 750, 760, 770) may also be equal to W2 (see FIG. 5) and formed on the insulating substrate (420). W1 and W2 may be equal to or different from each other.

[0081] The total number of wires is seven, as shown in Figure 7, but is not limited thereto and may be more or less than seven.

[0082] Although FIG. 7 illustrates a configuration in which circular wires and rectangular wires are alternately arranged, this is not a limitation. For example, two or more rectangular wires may be arranged between circular wires. Two or more circular wires may also be arranged between rectangular wires.

[0083] Although a single-layer structure is illustrated in Fig. 7, the wires may be arranged in a double-layer structure.

[0084] Although not shown, the wires (710, 720, 730, 740, 750, 760, 770) in the coil (410) may be covered with a coating member.

[0085] FIG. 8 is a cross-sectional view of a coil (410) in the wireless charging structure (400) of FIG. 4, cut along the AB portion in the z-axis direction, according to one embodiment.

[0086] When looking at the cross-sections of the first loop (801) and the second loop (802) of the coil (410) facing the x-axis in FIG. 8, the coil (410) may include a plurality of square wires (810, 850) and a plurality of circular wires (820, 830, 840). In addition, the wires (810, 820, 830, 840, 850) may be arranged on one surface of the insulating substrate (420) in a single layer structure. In addition, the plurality of square wires (810, 850) may be arranged at the edges of the plurality of circular wires (820, 830, 840) rather than between the plurality of circular wires (820, 830, 840). For example, in the first loop (801), the circular wire portions (821, 831, 841) may be positioned in the center, the first rectangular wire portion (811) may be positioned at the left edge, and the second rectangular wire portion (851) may be positioned at the right edge. In the second loop (802), the circular wire portions (822, 832, 842) may be positioned in the center, the third rectangular wire portion (812) may be positioned at the left edge, and the fourth rectangular wire portion (852) may be positioned at the right edge.

[0087] Referring to FIG. 8, the width between loops formed on the insulating substrate (420), including the first loop (801) and the second loop (802), may be equal to W1 (see FIG. 5). In addition, the width between wires (810, 820, 830, 840, 850) may also be equal to W2 (see FIG. 5) and formed on the insulating substrate (420). W1 and W2 may be equal to or different from each other.

[0088] The total number of wires is five, as shown in Fig. 8, but is not limited thereto. For example, the number of circular wires may be one, two, or four or more, rather than three. The number of square wires arranged on the left edge may be two or more, rather than one. The number of square wires arranged on the right edge may be two or more, rather than one.

[0089] Although the square wires are depicted in FIG. 8 as being positioned on both left and right edges of the circular wires, this is not a limitation. For example, one or more square wires may be positioned only on the left or only on the right side of one or more circular wires.

[0090] Although a single-layer structure is illustrated in Fig. 8, the wires may be arranged in a double-layer structure.

[0091] Although not shown, the wires (810, 820, 830, 840, 850) in the coil (410) may be covered with a coating member.

[0092] Fig. 9a is a diagram showing the current distribution in the coil wire when a current of approximately 100 kHz flows through the coil. Fig. 9b is a diagram showing the current distribution in the coil wire when a current of approximately 2 MHz flows through the coil. Contents overlapping with Figs. 4 to 8 are briefly explained or omitted.

[0093] Referring to FIGS. 9A and 9B, the first coil (910) includes five circular wires (911, 912, 913, 914, 915) arranged in a single-layer structure in a row. The second coil (920) includes two circular wires (921, 925) (e.g., 510 and 550 in FIG. 5) and three rectangular wires (922, 923, 924) (e.g., 520, 530, and 540 in FIG. 5) arranged in a single-layer structure in a single-layer structure. The circular wires (921, 925) are respectively positioned at both edges of the rectangular wires (922, 923, 924) rather than between the rectangular wires (922, 923, 924). The third coil (930) includes five square wires (931, 932, 933, 934, 935) arranged in a single layer structure.

[0094] Referring to FIG. 9A, when a current of about 100 KHz flows through the first coil (910), the current density (J (A / m2)) of the circular wires (911, 912, 913, 914, 915) in the first coil (910) is evenly distributed as the first current density (901). When a current of about 100 KHz flows through the second coil (920), the current density of the circular wires (921, 925) in the second coil (920) is evenly distributed as the first current density (901), and the current density of the rectangular wires (922, 923, 924) is evenly distributed as the second current density (902). When a current of about 100 KHz flows through the third coil (930), the current density of the square wires (931, 932, 933, 934, 935) in the third coil (930) is evenly distributed as the second current density (902). As described above, it can be confirmed that the current density is evenly distributed in the 100 KHz band regardless of the cross-sectional shape of the wire or whether circular wires and square wires are mixed.

[0095] Referring to FIG. 9B, when a current of about 2 MHz flows through the first coil (910), a phenomenon occurs in which the current density is concentrated at the edges of the circular wires (911, 912, 913, 914, 915) (e.g., the left edge of each circular wire as shown). When a current of about 2 MHz flows through the third coil (930), a phenomenon occurs in which the current density is concentrated at the edges of the rectangular wires (931, 932, 933, 934, 935) (e.g., the left and right edges of each rectangular wire as shown). When a current of about 2 MHz flows through the second coil (920), the current density is formed relatively high at the edges, but the current concentration phenomenon is alleviated. As described above, when a coil is configured by mixing circular wires and rectangular wires, the current concentration phenomenon is alleviated, and thus the efficiency of wireless charging can be increased. The increase in efficiency due to the alleviation of the current concentration phenomenon is further explained with reference to Figures 10a and 10b.

[0096] Fig. 10a is a graph showing the relationship between frequency and resistance in a coil. Fig. 10b is a graph showing the relationship between frequency and Q factor in a coil. Contents overlapping with Figs. 4 to 8 are briefly explained or omitted.

[0097] Referring to FIGS. 10A and 10B, the first coil (1010) includes five strands of circular wires arranged in a single layer structure in a row. The second coil (1020) includes two strands of circular wires and three strands of rectangular wires arranged in a single layer structure in a row. In the second coil (1020), the two strands of circular wires are respectively positioned at both edges of the three strands of rectangular wires, not between them. The third coil (1030) includes five strands of rectangular wires arranged in a single layer structure in a row. The fourth coil (1040) includes two strands of rectangular wires and three strands of circular wires arranged in a single layer structure in a row. In the fourth coil (1040), the two strands of rectangular wires are respectively positioned at both edges of the three strands of circular wires, not between them.

[0098] Referring to Fig. 10a, it can be confirmed that, overall, as the frequency of the current flowing through the coil increases, the resistance of the corresponding coil also increases. The resistance of the second coil (1020) and the fourth coil (1040) is smaller than the resistance of the first coil (1010) in a low frequency band with a reference to about 1 MHz. Therefore, when power is wirelessly transmitted or received in a low frequency band, the power loss may be relatively small in the second coil (1020) and the fourth coil (1040). The resistance of the second coil (1020) and the fourth coil (1040) is smaller than the resistance of the third coil (1030) in a high frequency band with a reference to about 1 MHz. Therefore, when power is wirelessly transmitted or received in a high frequency band, the power loss may be relatively small in the second coil (1020) and the fourth coil (1040).

[0099] Referring to FIG. 10b, the Q factor is a measure of power loss in a given coil, and the lower the power loss, the higher the Q factor value. When power is wirelessly transmitted or received in a high frequency band with a reference to about 0.5 MHz, it can be confirmed that the second coil (1020) and the fourth coil (1040) have relatively less power loss than the third coil (1030).

[0100] As seen in the graphs of FIGS. 10a and 10b, when wireless transmission and reception of power is required in various frequency bands, it may be advantageous in terms of compatibility to apply the second coil (1020) or the third coil (1030) to the electronic device rather than the first coil (1010) or the third coil (1030).

[0101] According to one embodiment, a wireless charging structure for wireless charging (e.g., the wireless charging structure (400) of FIG. 4) may include an insulating substrate; a coil including a plurality of wires; a first conductive pad electrically connected to one end of the plurality of wires; and a second conductive pad electrically connected to the other end of the plurality of wires. The plurality of wires may be formed on one surface of the insulating substrate in a winding structure in which the plurality of wires are wound multiple times clockwise or counterclockwise around a first axis perpendicular to the insulating substrate. The plurality of wires may include at least one circular wire having a circular cross-section and at least one rectangular wire having a rectangular cross-section.

[0102] The plurality of wires may be arranged in a single layer on the one surface of the insulating substrate when viewed in a second axial direction parallel to the first axis. The coil may include two or more square wires. The at least one circular wire may be located at an edge of the two or more square wires, not between the two or more square wires. The coil may include two or more circular wires. Among the two or more circular wires, at least one circular wire (e.g., the circular wire (510) of FIG. 5) may be arranged at a left edge of the two or more square wires when viewed in the two-axis direction. Among the two or more circular wires, the remaining circular wires (e.g., the circular wire (550) of FIG. 5) may be arranged at a right edge of the two or more square wires when viewed in the two-axis direction.

[0103] The plurality of wires may be arranged in a single layer on the one surface of the insulating substrate when viewed in a second axial direction parallel to the first axis. The coil may include two or more circular wires. The at least one rectangular wire may be located at an edge of the two or more circular wires, not between the two or more circular wires. The coil may include two or more rectangular wires. Among the two or more rectangular wires, at least one rectangular wire (e.g., the rectangular wire (810) of FIG. 8) may be arranged at a left edge of the two or more circular wires when viewed in the two-axis direction. Among the two or more rectangular wires, the remaining rectangular wires (e.g., the rectangular wire (850) of FIG. 8) may be arranged at a right edge of the two or more circular wires when viewed in the two-axis direction.

[0104] The above plurality of wires may be arranged in a plurality of layers (e.g., see FIG. 6) on one surface of the insulating substrate when viewed in a second axial direction parallel to the insulating substrate.

[0105] The number of circular wires and / or the ratio of the number of circular wires to the total number of wires can be determined based on the frequency of the power signal wirelessly received through the coil or the power signal wirelessly transmitted through the coil.

[0106] According to one embodiment, a portable power receiving device (e.g., power receiving device (202) of FIG. 2) may include a front cover forming a front surface of the power receiving device; a rear cover forming a rear surface of the power receiving device; a display disposed between the front cover and the rear cover and visually exposed through the front surface; a battery disposed between the display and the rear cover; and a wireless charging structure disposed between the battery and the rear cover and configured to charge the battery (e.g., wireless charging structure (400) of FIG. 4).

[0107] According to one embodiment, a power supply device (e.g., power supply device (201) of FIG. 2) may include a front cover forming a front side of the power supply device; a rear cover forming a rear side of the power supply device; and a wireless charging structure (e.g., wireless charging structure (400) of FIG. 4) disposed between the front cover and the rear cover and configured to wirelessly transmit power to a power receiving device.

[0108] In the above explanation, the prefixes “first,” “second,” and “third” are only used to distinguish between the same names and do not have any special meaning in themselves, such as importance or order.

[0109] Electronic devices according to the various embodiments disclosed in this document may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to the embodiments of this document are not limited to the aforementioned devices.

[0110] The various embodiments of this document and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0111] The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. In one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0112] Various embodiments of the present document may be implemented as software (e.g., a program (140)) including one or more instructions stored in a storage medium (e.g., an internal memory (136) or an external memory (138)) readable by a machine (e.g., an electronic device (101)). For example, a processor (e.g., a processor (120)) of the machine (e.g., an electronic device (101)) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0113] According to one embodiment, the method according to various embodiments disclosed in this document may be provided as a computer program product. The computer program product may be traded between sellers and buyers as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or may be provided through an application store (e.g., Play Store). TM ) or directly between two user devices (e.g., smart phones), online distribution (e.g., downloading or uploading). In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0114] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. A wireless charging structure for wireless charging is provided. insulating substrate; A coil comprising a plurality of wires; a first conductive pad electrically connected to one end of the plurality of wires; and a second conductive pad electrically connected to the other ends of the plurality of wires, The above plurality of wires are formed on one surface of the insulating substrate in a winding structure that is wound several times clockwise or counterclockwise around a first axis perpendicular to the insulating substrate, A wireless charging structure wherein the plurality of wires include at least one circular wire having a circular cross-section and at least one rectangular wire having a rectangular cross-section.

2. In paragraph 1, The above plurality of wires are arranged in one layer on the one surface of the insulating substrate when viewed in the second axis direction parallel to the first axis, The above coil comprises two or more square wires, A wireless charging structure, wherein at least one circular wire is located at an edge of two or more rectangular wires, rather than between the two or more rectangular wires.

3. In paragraph 2, The above coil comprises two or more circular wires, Among the two or more circular wires, at least one circular wire is arranged at the left edge of the two or more rectangular wires when viewed in the two-axis direction, A wireless charging structure, wherein among the two or more circular wires, the remaining circular wires are arranged at the right edge of the two or more rectangular wires when viewed in the two-axis direction.

4. In paragraph 1, The above plurality of wires are arranged in one layer on the one surface of the insulating substrate when viewed in the second axis direction parallel to the first axis, The above coil comprises two or more circular wires, A wireless charging structure, wherein at least one square wire is located at an edge of two or more circular wires, rather than between the two or more circular wires.

5. In paragraph 4, The above coil comprises two or more square wires, Among the two or more square wires, at least one square wire is arranged at the left edge of the two or more circular wires when viewed in the two-axis direction, A wireless charging structure, wherein among the two or more square wires, the remaining square wires are arranged at the right edge of the two or more circular wires when viewed in the two-axis direction.

6. In paragraph 1, A wireless charging structure, wherein the plurality of wires are arranged in a plurality of layers on the one surface of the insulating substrate when viewed in a second axial direction parallel to the insulating substrate.

7. In paragraph 1, A wireless charging structure, wherein the number of circular wires and / or the ratio of the number of circular wires to the total number of wires is determined based on the frequency of the power signal wirelessly received through the coil or the power signal wirelessly transmitted through the coil.

8. In a portable power receiving device, A front cover forming the front of the power receiving device; A rear cover forming the rear of the power receiving device; A display disposed between the front cover and the rear cover and visually exposed through the front; a battery disposed between the display and the rear cover; and A power receiving device comprising a wireless charging structure of any one of claims 1 to 7, disposed between the battery and the rear cover and for charging the battery.

9. In the power supply device, A front cover forming the front of the power supply device; a rear cover forming the rear of the power supply device; and A power supply device comprising a wireless charging structure according to any one of claims 1 to 7, disposed between the front cover and the rear cover and for wirelessly transmitting power to a power receiving device.

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