Electronic device including coil

An electronic device is provided. The electronic device includes a housing; a plurality of coils that are disposed on a first layer within the housing; a plurality of other coils disposed on a second layer substantially parallel to the first layer; a first conductor that connects an end point of a first coil of the plurality of coils and a start point of a second coil of the plurality of other coils and conducts a current from the end point of the first coil to the start point of the second coil; and a second conductor that connects a start point of a third coil adjacent to an outer side of the first coil of the plurality of coils and an end point of the second coil and conducts the current to be applied from the end point of the second coil to the start point of the third coil, wherein the first conductor and the second conductor induce a directional magnetic field when the current flows.

PRIORITY

This application claims priority under 35 U.S.C. § 119(a) to a Korean Patent Application Serial filed on Feb. 4, 2016 in the Korean Intellectual Property Office and assigned Serial No. 10-2016-0014440, the entire content of which is incorporated herein by reference.

BACKGROUND

1. Field of the Disclosure

The present disclosure relates to an electronic device including a coil and, more particularly, to an electronic device including a coil capable of discharging a magnetic field when a current is applied.

2. Description of the Related Art

These days, electronic devices including a coil that induces a magnetic field have rapidly increased. For example, the electronic device may perform magnetic secure transmission (MST). The electronic device may apply a current to an embedded coil and the coil may induce an induced magnetic field based on the current applied to the coil. In this case, the electronic device may control the current applied to the coil and the induced magnetic field induced from the coil may vary depending on the controlled current. In addition, a conventional point of sale (POS) terminal for payment of a magnetic credit card may acquire payment information by detecting the change in the magnetic field through swiping of the magnetic credit card. Accordingly, if the electronic device can generate the same magnetic field change as the magnetic field change by the swiping of the magnetic credit card, the electronic device can perform the payment of the magnetic credit card. The conventional electronic device may generate an MST signal according to magnetic credit card information and apply a current corresponding to the generated MST signal to the coil. The coil may induce the changed magnetic field corresponding to the swiping of the magnetic credit card according to the applied current.

Also, the electronic device may perform wireless charging by using the embedded coil. The coil embedded into the electronic device may generate an induced current based on the magnetic field input from the outside and, accordingly, perform the wireless charging. Alternatively, the electronic device may apply the current to the coil and thus wirelessly charge another electronic device by discharging the induced magnetic field.

As described above, the conventional electronic device may include the coil for performing various operations such as the MST or the wireless charging.

For good performance of MST or wireless charging, an electronic device should form a sufficiently large induced magnetic field. When the electronic device forms a relatively small induced magnetic field, an induced current induced by the electronic device in a receiving side also becomes small, so that a charging speed may decrease or good delivery of an MST signal may be difficult.

For the good performance of the MST or wireless charging, a coil included in the electronic device should have sufficient inductance. Magnetic flux by the coil may be a product of the inductance and the current applied to the coil. Accordingly, as the inductance of the coil is larger, a relatively larger induced magnetic field may be formed for the same current. That is, in order to form a sufficiently large magnetic field, the electronic device should include a coil having relatively high inductance. In addition, the inductance of the coil may be associated with the number of turns of the coil and a strength of the magnetic field induced by the coil may be also proportional to the number of turns of the coil. However, a small electronic device which can be carried has a difficulty in unlimitedly increasing the number of turns of the coil.

Accordingly, it is required to develop a coil structure having relatively high inductance in the limited area.

SUMMARY

According to various aspects of the present disclosure, an electronic device including coils of a plurality of layers having relatively high inductance even in a limited mounting area may be provided. Particularly, the electronic device may include conductors that connect coils disposed on different layers and the conductors induce magnetic fields, so that a total strength of the magnetic fields induced from the electronic device may increase. In particular, a direction of the magnetic field induced from the coils may be different from a direction of the magnetic field induced from the conductor and, accordingly, the electronic device may induce magnetic fields in various directions and thus have the high degree of freedom in a disposition.

In accordance with an aspect of the present disclosure, an electronic device is provided. The electronic device includes a housing; a plurality of coils that are disposed on a first layer within the housing; a plurality of other coils disposed on a second layer substantially parallel to the first layer; a first conductor that connects an end point of a first coil of the plurality of coils and a start point of a second coil of the plurality of other coils and conducts a current from the end point of the first coil to the start point of the second coil; and a second conductor that connects a start point of a third coil adjacent to an outer side of the first coil of the plurality of coils and an end point of the second coil and conducts the current to be applied from the end point of the second coil to the start point of the third coil, wherein the first conductor and the second conductor induce a directional magnetic field when the current flows.

In accordance with another aspect of the present disclosure, an electronic device is provided. The electronic device includes a housing; a first coil disposed within the housing; one or more second coils having a winding pattern substantially equal to the first coil and disposed to be substantially parallel to the first coil; one or more first conductors that connect the first coil and the one or more second coils in series or connect the one or more second coils in series; and a second conductor that connects the one or more second coils and a third coil disposed on an outer side of the first coil, wherein each of the first coil and the second coil includes one or more connection parts having a width less than a width of the winding pattern and the one or more first conductors and the second conductor are connected to the one or more connection parts.

In accordance with another aspect of the present disclosure, an apparatus is provided. The apparatus includes a housing including a first surface and a second surface facing in a direction opposite to the first surface; a printed circuit board (PCB) included in a space between the first surface and the second surface of the housing, substantially parallel to the first surface, and including a plurality of layers; a first conductive coil disposed on a first layer of the plurality of layers; a second conductive coil disposed on a second layer of the plurality of layers, and at least partially overlapping the first coil and partially opened when viewed from a top of the first surface; a conductive via set that electrically connects a first point of the first coil and a second point of the second coil; and a magnetic signal generating circuit configured to generate a magnetic signal and electrically connected to the second conductive coil.

As used herein, the expressions “have”, “may have”, “include”, or “may include” refer to the existence of a corresponding feature (e.g., numeral, function, operation, or constituent element such as component), and do not exclude one or more additional features.

Hereinafter, an electronic device according to various embodiments will be described with reference to the accompanying drawings. 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 an electronic device.

FIG. 1is a block diagram of an electronic device101within a network environment100, according to various embodiments.

Referring toFIG. 1, the electronic device101may include a bus110, a processor120, a memory130, an input/output interface150, a display160, a communication module170, a wireless charging module180, and an MST module190. According to some embodiments, the electronic device101may omit at least one of the above elements or may further include other elements.

The bus110may include, for example, a circuit which interconnects the elements110to190and delivers communication (for example, a control message and/or data) between the elements110to190.

The processor120may include one or more of a central processing unit (CPU), an application processor (AP), and a communication processor (CP). For example, the processor120may carry out operations or data processing relating to control and/or communication of at least one other element of the electronic device101.

The memory130may include a volatile memory and/or a non-volatile memory. The memory130may store, for example, instructions or data related to at least one other element of the electronic device101. According to an embodiment, the memory130may store software and/or a program140. The program140may include a kernel141, middleware143, an application programming interface (API)145, and/or application programs (or “applications”)147. At least some of the kernel141, the middleware143, and the API145may be referred to as an operating system (OS).

The kernel141may control or manage, for example, system resources (for example, the bus110, the processor120, and the memory130) which are used to execute an operation or a function implemented in the other programs (for example, the middleware143, the API145, or the application programs147). Furthermore, the kernel141may provide an interface through which the middleware143, the API145, or the application programs147may access the individual elements of the electronic device101to control or manage the system resources.

The middleware143may serve, for example, as an intermediary for allowing the API145or the application programs147to communicate with the kernel141to exchange data.

In addition, the middleware143may process one or more task requests received from the application programs147according to priorities thereof. For example, the middleware143may assign priorities for using the system resources (for example, the bus110, the processor120, the memory130, or like) of the electronic device101to at least one of the application programs147. For example, the middleware143may perform scheduling or load balancing on the one or more task requests by processing the one or more task requests according to the priorities assigned thereto.

The API145is an interface through which the applications147control functions provided from the kernel141or the middleware143, and may include, for example, at least one interface or function (for example, instruction) for file control, window control, image processing, or text control.

The input/output interface150may function as, for example, an interface that may transfer instructions or data input from a user or another external device to the other element(s) of the electronic device101. Furthermore, the input/output interface150may output the instructions or data received from the other element(s) of the electronic device101to the user or another external device.

The display160may include, for example, a liquid crystal display (LCD), a light emitting diode (LED) display, an organic light emitting diode (OLED) display, a microelectromechanical systems (MEMS) display, and an electronic paper display. The display160may display, for example, various types of contents (for example, text, images, videos, icons, or symbols) to the user. The display160may include a touch screen and receive, for example, a touch, gesture, proximity, or hovering input by using an electronic pen or the user's body part.

The communication module170may set, for example, communication between the electronic device101and a first external electronic device102, a second external electronic device104, or a server106. For example, the communication module170may be connected to a network162through wireless or wired communication to communicate with the second external electronic device104or the server106.

The wireless communication may use at least one of, for example, long term evolution (LTE), LTE-advance (LTE-A), code division multiple access (CDMA), wideband CDMA (WCDMA), universal mobile telecommunications system (UMTS), wireless broadband (WiBro), and Global system for mobile communications (GSM), as a cellular communication protocol. In addition, the wireless communication may include, for example, short range communication164. The short-range communication164may be performed by using at least one of, for example, Wi-Fi, Bluetooth, near field communication (NFC), and global navigation satellite system (GNSS). The GNSS may include at least one of, for example, a global positioning system (GPS), a global navigation satellite system (Glonass), a Beidou navigation satellite system (hereinafter “Beidou”), and a European global satellite based navigation system (Galileo), according to a use area, a bandwidth, or the like. “GPS” may be interchangeably used with the “GNSS”. The wired communication may include at least one of, for example, a universal serial bus (USB), a high definition multimedia interface (HDMI), recommended standard 232 (RS-232), and a plain old telephone service (POTS). The network162may include at least one of a communication network such as a computer network (for example, a local area network (LAN) or a wide area network (WAN)), the Internet, and a telephone network.

The wireless charging module180may receive wireless power from a wireless power receiver or transmit wireless power to another electronic device. The wireless charging module180may receive or transmit wireless power based on an induction scheme or a resonance scheme. The wireless charging module180may include a coil for transmitting/receiving wireless power.

The MST module190may perform MST with another electronic device. The performance of the MST may mean formation of a magnetic field191that changes the size according to time. For example, the MST module190may induce the magnetic field191that changes size according to time, and the change in size according to time may be equal to transmission of a signal including information. Another electronic device, for example, a POS terminal may receive a signal including information from the electronic device101by detecting the change in the size of the magnetic field191according to time. In addition, the MST module190may include a coil for discharging a magnetic field. The MST module190may receive a signal from another electronic device by detecting the change in the magnetic field received from the other electronic device according to time.

Each of the first and second external electronic apparatuses102and104may be of a type identical to or different from that of the electronic apparatus101. According to an embodiment, the server106may include a group of one or more servers. According to various embodiments of the present disclosure, all or some of the operations performed in the electronic device101may be performed in another electronic device or a plurality of electronic devices102and104, or the server106. According to an embodiment, when the electronic device101has to perform some functions or services automatically or in response to a request, the electronic device101may make a request for performing at least some functions relating thereto to another electronic device102or104or the server106instead of performing the functions or services by itself or in addition. Another electronic device102or104or the server106may execute the requested functions or the additional functions, and may deliver a result of the execution to the electronic apparatus101. The electronic device101may provide the received result as it is or additionally process the result and provide the requested functions or services. To achieve this, for example, cloud computing, distributed computing, or client-server computing technology may be used.

FIG. 2is a block diagram of an electronic device201according to various embodiments.

Referring toFIG. 2, the electronic device201may include, for example, all or some of the electronic device101illustrated inFIG. 1. The electronic device201may include one or more processors210(for example, an AP), a communication module220, an MST module222, a subscriber identification module224, a memory230, a sensor module240, an input device250, a display260, an interface270, an audio module280, a camera module291, a power management module295, a battery296, an indicator297, a motor298, and a wireless charging module299.

The processor210may control a plurality of hardware or software elements connected to the processor210by driving an operating system or an application program and perform processing of various pieces of data and calculations. The processor210may be implemented by, for example, a system on chip (SoC). According to an embodiment, the processor210may further include a graphics processing unit (GPU) and/or an image signal processor. The processor210may also include at least some (for example, a cellular module221) of the elements illustrated inFIG. 2. The processor210may load, into a volatile memory, instructions or data received from at least one (for example, a non-volatile memory) of the other elements and may process the loaded instructions or data, and may store various data in a non-volatile memory.

The communication module220may have a configuration equal or similar to that of the communication interface170ofFIG. 1. The communication module220may include, for example, a cellular module221, a Wi-Fi module223, a Bluetooth (BT) module225, a GNSS module227(for example, a GPS module, a Glonass module, a Beidou module, or a Galileo module), an NFC module228, and a radio frequency (RF) module229.

The cellular module221may provide a voice call, an image call, a text message service, or an Internet service through, for example, a communication network. According to an embodiment, the cellular module221may distinguish between and authenticate electronic devices201within a communication network using a subscriber identification module (SIM) card224. The cellular module221may perform at least some of the functions that the processor210may provide. The cellular module221may include a CP.

The Wi-Fi module223, the Bluetooth module225, the GNSS module227, or the NFC module228may include, for example, a processor that processes data transmitted and received through the corresponding module. According to some embodiments, at least some (two or more) of the cellular module221, the Wi-Fi module223, the BT module225, the GNSS module227, and the NFC module228may be included in one integrated circuit (IC) or IC package.

The RF module229may transmit/receive, for example, a communication signal (for example, an RF signal). The RF module229may include, for example, a transceiver, a power amplifier module (PAM), a frequency filter, a low noise amplifier (LNA), or an antenna. According to another embodiment of the present disclosure, at least one of the cellular module221, the Wi-Fi module223, the BT module225, the GNSS module227, and the NFC module228may transmit/receive an RF signal through a separate RF module.

The subscriber identification module224may include, for example, a card including a subscriber identity module and/or an embedded SIM, and may contain unique identification information (for example, an integrated circuit card identifier (ICCID)) or subscriber information (for example, an international mobile subscriber identity (IMSI)).

The MST module222may transmit/receive a signal using a magnetic field, for example, a signal including information such as payment information. The MST module222may induce the magnetic field that changes the size according to time and perform communication based on an induced current from the received magnetic field.

The memory230(for example, the memory130) may include, for example, an internal memory232or an external memory234. The internal memory232may include at least one of a volatile memory (for example, a dynamic random access memory (DRAM), a static RAM (SRAM), a synchronous DRAM (SDRAM), and the like) and a non-volatile memory (for example, a one time programmable read only memory (OTPROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), a mask ROM, a flash ROM, a flash memory (for example, a NAND flash memory or a NOR flash memory), a hard disk drive, a solid state drive (SSD), and the like).

The external memory234may further include a flash drive, for example, a compact flash (CF), a secure digital (SD) device, a micro SD (Micro-SD) device, a mini SD (Mini-SD) device, an eXtreme digital (xD) device, a memory stick, or the like. The external memory234may be functionally and/or physically connected to the electronic device201through various interfaces.

The sensor module240may measure a physical quantity or detect an operation state of the electronic device201, and may convert the measured or detected information into an electrical signal. The sensor module240may include, for example, at least one of a gesture sensor240A, a gyro sensor240B, an atmospheric pressure sensor240C, a magnetic sensor240D, an acceleration sensor240E, a grip sensor240F, a proximity sensor240G, a color sensor240H (for example, a red, green, blue (RGB) sensor), a biometric sensor240I, a temperature/humidity sensor240J, an illumination sensor240K, and a ultraviolet (UV) light sensor240M. Additionally or alternatively, the sensor module240may include, for example, an electronic nose (E-nose) sensor, an electromyography (EMG) sensor, an electroencephalogram (EEG) sensor, an electrocardiogram (ECG) sensor, an infrared (IR) sensor, an iris sensor, and/or a fingerprint sensor. The sensor module240may further include a control circuit for controlling one or more sensors included therein. According to some embodiments, the electronic device201may further include a processor configured to control the sensor module240as a part of or separately from the processor210, and may control the sensor module240while the processor210is in a sleep state.

The input device250may include, for example, a touch panel252, a (digital) pen sensor254, a key256, and an ultrasonic input device258. The touch panel252may use at least one of, for example, a capacitive type, a resistive type, an infrared type, and an ultrasonic type. Also, the touch panel252may further include a control circuit. The touch panel252may further include a tactile layer and provide a tactile reaction to the user.

The (digital) pen sensor254may include, for example, a recognition sheet which is a part of the touch panel or is separated from the touch panel. The key256may include, for example, a physical button, an optical key or a keypad. The ultrasonic input device258may detect ultrasonic waves generated by an input tool through a microphone288and identify data corresponding to the detected ultrasonic waves.

The display260(for example, the display160) may include a panel262, a hologram device264or a projector266. The panel262may include a configuration identical or similar to that of the display160illustrated inFIG. 1. The panel262may be implemented to be, for example, flexible, transparent, or wearable. The panel262and the touch panel252may be implemented as one module. According to an embodiment, the panel262may include a pressure sensor (or a POS sensor) which may measure a strength of pressure of a user's touch. The pressure sensor may be implemented integratedly with the touch panel252or implemented by one or more sensors separated from the touch panel252. The hologram device264may show a three dimensional image in the air by using an interference of light. The projector266may display an image by projecting light onto a screen. The screen may be located, for example, inside or outside the electronic device201. According to an embodiment, the display260may further include a control circuit for controlling the panel262, the hologram device264, or the projector266.

The audio module280may bilaterally convert, for example, a sound and an electrical signal. At least some elements of the audio module280may be included in, for example, the input/output interface150illustrated inFIG. 1. The audio module280may process sound information which is input or output through, for example, a speaker282, a receiver284, earphones286, the microphone288or the like.

The camera module291is a device which may photograph a still image and a dynamic image. According to an embodiment, the camera module291may include one or more image sensors (for example, a front sensor or a back sensor), a lens, an image signal processor (ISP) or a flash (for example, LED or xenon lamp).

The power management module295may manage, for example, power of the electronic device201. According to an embodiment, the power management module295may include a power management IC (PMIC), a charger IC, or a battery gauge. The PMIC may have a wired and/or wireless charging scheme. Examples of the wireless charging method may include, for example, a magnetic resonance method, a magnetic induction method, an electromagnetic wave method, and the like, and may further include additional circuits (for example, a coil loop, a resonance circuit, a rectifier, etc.) for wireless charging. The battery gauge may measure, for example, a residual quantity of the battery296, and a voltage, a current, or a temperature during the charging. The battery296may include, for example, a rechargeable battery or a solar battery. The power management module295may be connected to the wireless charging module299. The wireless charging module299may receive wireless power from another electronic device and charge the battery296. Alternatively, the wireless charging module299may wirelessly charge another electronic device by using power from the battery296. The wireless charging module299may be directly connected to the battery296.

The indicator297may indicate a particular state (for example, a booting state, a message state, a charging state, or the like) of the electronic device201or a part (for example, the processor210) of the electronic device201. The motor298may convert an electrical signal into mechanical vibration, and may generate vibration, a haptic effect, or the like. Although not illustrated, the electronic device201may include a processing unit (for example, a GPU) for supporting a mobile television (TV). The processing unit for supporting mobile TV may, for example, process media data according to a certain standard such as digital multimedia broadcasting (DMB), digital video broadcasting (DVB), or mediaFlo™.

Each of the above-described component elements of hardware according to the present disclosure may be configured with one or more components, and the names of the corresponding component elements may vary based on the type of electronic device. The electronic device according to various embodiments of the present disclosure may include at least one of the aforementioned elements. Some elements may be omitted or other additional elements may be further included in the electronic device. Also, some of the hardware components according to various embodiments may be combined into one entity, which may perform functions identical to those of the relevant components before the combination.

FIG. 3is a diagram illustrating MST according to various embodiments of the present disclosure.

Referring toFIG. 3, a POS terminal301may be a device, which may acquire payment information from a magnetic credit card and transmit the acquired information to a payment server. For example, a reader header of the POS terminal301may sense a magnetic field when a magnetic recording medium such as a magnetic stripe of the credit card contacts the reader header. When the magnetic credit card is swiped through the reader header, the magnetic field sensed by the POS terminal301may be changed and the POS terminal301may acquire the changed magnetic field as payment information. That is, the POS terminal301may acquire the magnetic field changed according to time as the payment information.

The POS terminal301may transmit the payment information to the payment server, and the payment server may perform payment processing by using the received payment information. The POS terminal301may also transmit additional information (for example, payment amount) input from an input device to the payment server, and the payment server may determine whether to approve the payment based on the received payment information and the additional information. The payment server may transmit information on the approval of the payment or information on rejection of the payment to the POS terminal301, and the POS terminal301may output the received information. That is, the POS terminal301may be a relay device for the payment information and the information on the payment approval or rejection, and receive a change in the ambient magnetic field as a signal.

In addition, the electronic device101according to various embodiments of the present disclosure may induce a magnetic field320. The electronic device101may include coils of a plurality of layers according to various embodiments of the present disclosure, and induce the magnetic field320by applying the current to the coil. According to various embodiments of the present disclosure, the electronic device101may display a payment application execution screen310on the display160. The payment application may include an image312related to a pre-registered credit card and an object311indicating that the payment is being performed. The electronic device101may change the magnetic field320according to time in accordance with the pre-registered credit card and, accordingly, a change pattern of the magnetic field320generated by the electronic device101may be the same as or correspond to a change pattern of the magnetic field by swiping of the credit card. That is, based on the fact that the magnetic field, which is changed according to the time, is formed, the discharging of the magnetic field from the electronic device101may have the same effect as the swiping of the credit card. Accordingly, the user may perform payment by using the electronic device101without a need to possess the credit card.

FIG. 4is a flowchart illustrating an operation of the electronic device according to various embodiments of the present disclosure.

Referring toFIG. 4, in operation410, the electronic device101may execute the payment application. The payment application has no limitation as long as the payment application is an application which can manage payment information related to the credit card and generate an MST signal. In operation420, the electronic device101may perform user authentication. The electronic device101may output, for example, a graphic user interface which makes a request for inputting preset security information. The security information may be biometric information such as a user's fingerprint, voice, and iris or information on a password or pattern preset by the user, and has no limitation in the type. The electronic device101may receive the requested security information and compare the received security information with pre-stored security information, so as to perform user authentication.

In operation430, the electronic device101may generate the MST signal. The MST signal may include payment information corresponding to the pre-registered credit card. In operation440, the electronic device may apply the current corresponding to the MST signal to an MST coil. The MST coil may generate an induced magnetic field based on the applied current. The size of the induced magnetic field may be changed according to, for example, payment information corresponding to the credit card. The POS terminal may acquire payment information by sensing the induced magnetic field.

FIG. 5is a diagram of the coil according to various embodiments of the present disclosure.

Referring toFIG. 5, a first coil510and a third coil530may be disposed on a first layer. The third coil530may be adjacent to the outer side of the first coil510, which means that a next coil disposed on the outer side of the first coil510is the third coil530. A winding radius of the third coil530may be larger than a winding radius of the first coil510. That is, the first coil510may be disposed relatively on the inner side, and the third coil530may be disposed relatively on the outer side compared to the first coil510. The inner side or the outer side may be determined according to a distance between the coil510or530and the center. As illustrated inFIG. 5, a distance between the center of the coil and the first coil510may be shorter than a distance between the center of the coil and the third coil530and, accordingly, it may be defined that the first coil510is disposed relatively inside compared to the third coil530. In addition, two or more coils may be disposed on the first layer. That is, additional coils may be further disposed on the outer side of the third coil530. That is, a plurality of coils (for example, the first coil510and the third coil530) may be disposed on the first layer. The plurality of coils may perform one operation (for example, discharging the magnetic field for MST). The plurality of coils may be connected to each other through a conductor and a plurality of coils on a second layer. A plurality of additional coils for another operation (for example, wireless charging or NFC) may be further disposed on the first layer, which will be described below in more detail. In this case, the plurality of coils and the plurality of additional coils may not be directly connected to each other.

The first coil510may include a conductor connected from a start point511to an end point512, and the conductor may have a winding form. Although it is illustrated that the conductor included in the first coil510has the winding form bent at a right angle in an embodiment ofFIG. 5, this is only an example, and the first coil510has no limitation if the coil is a conductor which can induce an induced magnetic field in a particular direction. The start point511of the first coil510may be formed substantially more inwardly than the end point512of the first coil510. The inner side may refer to a side relatively closer to the center of the first coil510. A current i may be applied to the first coil510, and the first coil510may induce the induced magnetic field according to the applied current i. In addition, the current i of the same direction as that of the first coil510may be applied to the third coil530, and the third coil530may also induce the induced magnetic field. The magnetic field induced from the first coil510and the third coil530may be named a first magnetic field B1.

The first coil510may have a closed loop form. More specifically, a second connection part514connected with the end point512of the first coil510may have a form extended to the right side as viewed from the top. The second connection part514may extend to the right side while passing through an x direction coordinate of the start point511of the first coil510and, accordingly, the start point511of the first coil510may be isolated from the outside by the second connection part514. As described above, the form in which the start point of the coil is closed from the outside by the connection part connected to the end point may be named the closed loop form. That is, in the closed loop form, an x axis coordinate of the end point512of the first coil510may be disposed on the right side of an x axis coordinate of the start point511of the first coil510. In addition, a first connection part513and the second connection part514of the first coil510may be parts for a connection with the conductor, that is, a via set, and the remaining parts except for the connection parts513and514may be parts for the winding. Accordingly, the remaining parts except for the connection parts of the coil may be named a winding pattern.

The first coil510may generally have a width of d1. In addition, the first connection part513connected to the start point511of the first coil510may generally have a width of d2 and, accordingly, some of the first connection part513may have a form in which a width is reduced from d1 to d2. As the width d2 of the first connection part513is narrower than the general width d1 of the first coil510, it is possible to secure a space to dispose a plurality of conductors561to564and also reduce a total mounting areas of the coils510and530disposed on the first layer. For example, if the first connection part513has the width d1, a width of the corresponding part becomes larger than 2×d1 in consideration of separation between the first connection part513and the second connection part514. However, since the first connection part513has a structure in which the width is reduced, a total coil width of the part where the first connection part513and the second connection part514are disposed may be about d1. More specifically, a sum of the first connection part513and the second connection part514may be smaller than d1. Accordingly, it is possible to prevent the mounting area of the coil in which the start point and the end point of the coil are located from being wide.

According to various embodiments of the present disclosure, the structure in which the width of the first connection part513becomes narrow and the structure in which the width of the second connection part514becomes narrow may correspond to each other. More specifically, the first connection part513may have the structure in which the width becomes narrower in an upper left direction as viewed from the top and the second connection part514may have the structure in which the width becomes narrower in a lower right direction as viewed from the top. That is, the first connection part513may have a form in which the width increases in a first side direction of the winding pattern from the start point511, and the second connection part514may have a form in which the width increases in a second side direction of the winding pattern from the end point512, which may be also applied to the remaining coils. Accordingly, the first connection part513and the second connection part514may be disposed together within the width d1. More specifically, a sum of the width d2 of the first connection part513and the width d2 of the second connection part514may be smaller than the width d1 of the winding pattern of the first coil510.

The end point512of the first coil510may be connected to the first conductor561. For example, the first conductor561may be formed in a direction substantially perpendicular to the first layer on which the first coil510is disposed. The first conductor561may be connected to a start point521of a second coil520. That is, the first conductor561may connect the end point512of the first coil510and the start point521of the second coil520and apply the current i from the end point512of the first coil510to the start point521of the second coil520. The first conductor561may extend in a direction substantially perpendicular to the first layer on which the first coil510is disposed and the second layer on which the second coil520is disposed. Another element may be disposed between the first layer and the second layer and, in this case, the first conductor561may connect the two coils510and520through an opening formed on the other element disposed therebetween. In this case, the first conductor561may be named a via set. According to various embodiments of the present disclosure, one conductor ofFIG. 5may be implemented by a plurality of separated conductors. That is, a plurality of separated conductors may connect the end point512of the first coil510and the start point521of the second coil520in a vertical direction. As a result, the number of conductors for connecting the end point of the coil on the first layer and the start point of the coil on the second layer may be one or more and, accordingly, the conductors may be named as the via set.

In addition, disposing on the first layer and the second layer may refer to disposing two PCBs or two flexible PCBs (FPCBs), respectively. Alternatively, the first coil510and the second coil520may be disposed on both surfaces of one PCB or FPCB, respectively. In this case, a structure in which the conductors, that is, the via set passes through one PCB or FPCB may appear. In this case, the first coil510may be disposed on the first layer and the second coil520may be disposed on the second layer. Alternatively, coils of two layers may be disposed on the inner side of the FPCB and a plating layer or a film for protecting the corresponding coil may be additionally included in the FPCB, which will be described below in more detail. Further, the first layer and the second layer may be substantially parallel to each other.

The second coil520may receive the current i through the first conductor561. In this case, the current i may be applied in a direction from a start point521of the second coil520to an end point522of the second coil520and may be applied to the second conductor562connected to the end point522. The second coil520may induce the induced magnetic field based on the applied current i. The induced magnetic field induced from the second coil520and a fourth coil540may be named as a second magnetic field B2.

The second coil520may include a conductor connected from the start point521to the end point522, and the conductor may have a winding form from the start point521to the end point522. The second coil520may include a third connection part523connected to the start point521and a fourth connection part524connected to the end point522. General widths of the third connection part523and the fourth connection part524may be smaller than a general width of the second coil520. Further, as described about the connection parts513and514of the first coil510, some of the connection parts523and524may have a form in which the width is reduced from the general width of the second coil520, that is, the width d1 of the winding pattern.

The second coil520may have an opened loop form, which is an open type. More specifically, the fourth connection part524connected with the end point522of the second coil520may have a form extended to the right side as viewed from the top. The fourth connection part524may extend without passing through an x direction coordinate of the start point521of the second coil520and, accordingly, the start point521of the second coil520may be isolated from the outside by the fourth connection part524. That is, the x axis coordinate of the end point522of the second coil520may be located relatively on the left side of the x axis coordinate of the start point521of the second coil520. As described above, the form in which the start point of the coil is not closed from the outside by the connection part connected to the end point may be named the opened loop form. In addition, as the second coil520has the opened loop form, another coil may be disposed on the inner side of the second coil520and an input/output pattern of the other coil may be disposed on an interval of the opened loop of the second coil520, which will be described below in more detail.

In addition, the end point522of the second coil520may be connected to the second conductor562. The second conductor562may be connected to a start point531of the third coil530disposed on the first layer. Accordingly, the end point522of the second coil520may be connected to the start point531of the third coil530. As the current i is applied from the end point522of the second coil520to the start point531of the third coil530, a direction of the current i applied to the second conductor562may be an up direction.

The third coil530may receive the current i through the second conductor562. In this case, the current i may be applied in a direction from the start point531of the third coil530to an end point532of the third coil530and may be applied to the third conductor563connected to the end point532. The third coil530may induce the induced magnetic field based on the applied current i.

The third coil530may include a conductor connected from the start point531to the end point532, and the conductor may have a winding form from the start point531to the end point532. The third coil530may include a fifth connection part533connected to the start point531and a sixth connection part534connected to the end point532. General widths of the fifth connection part533and the sixth connection part534may be smaller than the general width of the third coil530. Further, as described in relation to the connection parts513and514of the first coil510, some of the connection parts533and534may have a form in which the width is reduced from the general width d1 of the third coil530. The third coil530may have a closed loop form.

In addition, the end point532of the third coil530may be connected to the third conductor563. The third conductor563may be connected to a start point541of the fourth coil540disposed on the second layer. Accordingly, the end point532of the third coil530may be connected to the start point541of the fourth coil540. As the current i is applied from the end point532of the third coil530to the start point541of the fourth coil540, a direction of the current i applied to the third conductor563may be a down direction.

The fourth coil540may receive the current i through the third conductor563. In this case, the current i may be applied in a direction from the start point541of the fourth coil540to an end point542of the fourth coil540and may be applied to an output terminal connected to the end point542. The fourth coil540may induce the induced magnetic field based on the applied current i.

The fourth coil540may include a conductor connected from the start point541to the end point542, and the conductor may have a winding form from the start point541to the end point542. The fourth coil540may include a seventh connection part543connected to the start point541. A general width of the seventh connection part543may be smaller than the general width of the fourth coil540, that is, the width of the winding pattern. Further, as described in relation to the connection parts513and514of the first coil510, some of the connection part543may have a form in which the width is reduced from the general width d1 of the fourth coil540. The fourth coil540may have an opened loop form.

In addition, an input pattern550may be disposed on the second layer. The input pattern550may be connected to the fourth conductor564and the fourth conductor564may be connected to the start point511of the first coil510. The input pattern550may be connected to a means (for example, an MST communication module, a communication module, a battery, or a PMIC), which can provide the current, and, accordingly, the current i may be applied to the first coil510from the input pattern550. A direction of the current i applied to the fourth conductor564may be an up direction.

As a result, an order of coils to which the current is applied or a coil connection order may be C11, C21, C12, C22, C13, C23, . . . . In Cij, i may denote a layer and j may denote an order of the disposition from the inner side. For example, C21may be a first coil from the inner side on the second layer, and C32may be a second coil from the inner side on the third layer.

According to the above described coil structure, the current i provided from the input pattern550may be applied to the first coil510, the second coil520, the third coil530, and the fourth coil540. Accordingly, the number of turns of the whole coil may increase and thus inductance of the coil may also increase. That is, four turns are possible in a mounting area in which two turns are possible, so that inductance of the coil may increase. As a result, the size of the magnetic field (B1+B2) induced by the coil may also increase. Further, a magnetic field B3induced by the conductors561to564may be also formed and thus a strength of entire magnetic fields may increase. Particularly, as conductors having the same current direction are grouped and disposed, the magnetic field B3induced by the conductors561to564may increase. In addition, a direction of a directional magnetic field induced by the conductor may be determined according to a disposition form (for example, a straight line) of conductors having the same current direction. Accordingly, the disposition form of the conductors having the same current direction may be determined in consideration of the direction of the directional magnetic field. More specifically, the conductors562and564to which the current in the up direction is applied may be disposed adjacent to each other, and the conductors561and563to which the current in the down direction are disposed adjacent to each other. Further, the direction of the magnetic field B3induced by the conductors561to564may be different from the direction of the magnetic field (B1+B2) induced by the coils510to540, so that the electronic device101may induce the magnetic fields in various directions. Accordingly, the degree of freedom for the disposition of the electronic device101may increase, which will be described below in more detail.

FIG. 6Ais a plan view illustrating the coil disposed on the first layer according to various embodiments of the present disclosure.FIG. 6Bis a plan view illustrating the coil disposed on the second layer according to various embodiments of the present disclosure.FIG. 6Cis a plan view illustrating coils disposed on the first layer and the second layer while overlapping each other.

The first coil510and the third coil530may be disposed on the first layer. The third coil530may be adjacent to the outer side of the first coil510. The first coil510and the third coil530may have the closed loop form. In addition, the second coil520and the fourth coil540may be disposed on the second layer. The fourth coil540may be adjacent to the outer side of the second coil520. The second coil520and the fourth coil540may have the opened loop form. In addition, as illustrated inFIG. 6C, a part of the first coil510except for the first connection part513and the second connection part514and a part of the second coil520except for the third connection part523and the fourth connection part524may overlap each other. This indicates that a location of the part of the first coil510except for the first connection part513and the second connection part514and a location of the part of the second coil520except for the third connection part523and the fourth connection part524, that is, locations of the winding patterns are substantially the same. In addition, the disposition of the coils described above is only an example, and the first coil510and the second coil520may be configured to not overlap each other. According to various embodiments of the present disclosure, most parts of the third coil530and the fourth coil540except for the connection parts, that is, the winding patterns may overlap each other.

The first connection part513of the first coil510and the second connection part523of the second coil520may not overlap each other. This is because the second connection part514of the first coil510should extend up to the start point521of the second coil520since the end point512of the first coil510should be connected to the start point521of the second coil520. According to various embodiments of the present disclosure, the parts of the first coil510and the second coil520except for the connection parts, that is, the winding patterns may overlap each other, and the connection parts may not overlap.

In addition, as illustrated inFIG. 6C, the conductors562and564to which the current in the up direction is applied may be disposed adjacent to each other, and the conductors561and563to which the current in the down direction is applied are disposed adjacent to each other.

FIG. 7is a plan view illustrating locations of the conductors according to various embodiments of the present disclosure.

Referring toFIG. 7, a distance X1between the second conductor562and the fourth conductor564may be relatively smaller than a distance X2between the second conductor562and the first conductor561or a distance X3between the second conductor562and the third conductor563. Further, a distance X4between the first conductor561and the third conductor563may be relatively smaller than the distance X2between the second conductor562and the first conductor561or the distance X3between the second conductor562and the third conductor563. That is, the pattern of the conductors561to564may be designed such that the conductors to which the current in the same direction is applied are adjacent to each other. Accordingly, a direction of an induced magnetic field B4induced from the second conductor562and the fourth conductor564and a direction of an induced magnetic field B5induced from the first conductor561and the third conductor563may be the same between the first conductor561and the second conductor562. A vector sum of the induced magnetic fields B4and B5may be the third magnetic field B3by the conductors561to564described inFIG. 5. The third magnetic field B3by the conductors561to564may have directivity pointing to a particular direction different from that of a circular magnetic field formed by a general single conducting wire. In addition, inFIG. 7, a line generated by connecting the second conductor562and the fourth conductor564may have a first direction, and a line generated by connecting the first conductor561and the third conductor563may have a second direction. The first direction and the second direction may be the same as or different from each other. The direction of the third magnetic field B3may be determined according to the first direction and the second direction. A manufacturer may determine the first direction and the second direction in consideration of a pattern in which the user places the electronic device near the POS terminal.

FIGS. 8A and 8Bare diagrams illustrating an increase in the degree of freedom of the disposition of the electronic device according to various embodiments of the present disclosure.

Referring toFIG. 8A, the electronic device101may induce a magnetic field B1+B2in a direction substantially perpendicular to the display. Accordingly, when the display of the electronic device101is relatively parallel to the POS terminal301, the induced magnetic field B1+B2may approach the POS terminal301, so that transmission of an MST signal may be good. In addition, referring toFIG. 8B, the electronic device101may induce the magnetic field B3in a direction substantially parallel to the display, and the magnetic field B3may be induced by the current applied to the conductor, that is, the via set for the coil connection. Accordingly, when the display of the electronic device101is relatively perpendicular to the POS terminal301, the induced magnetic field B3may head for the POS terminal301, so that good transmission of the MST signal can be secured. Therefore, the disposition of the electronic device101may be comparatively free of the POS terminal301.

FIG. 9Ais a plan view illustrating the coil disposed on the second layer according to various embodiments of the present disclosure.

As illustrated inFIG. 9A, the second coil520and the fourth coil540, which have the opened loop form, may be disposed on the second layer. In addition, an input pattern550may be disposed on the second layer. As the second coil520has the opened loop form, the start point521of the second coil520and the end point522of the second coil520may have an interval therebetween. Further, the input pattern550and the second coil520may have an interval901therebetween. As the input pattern550and the second coil520have the interval901therebetween, an additional coil910may be further disposed on the second layer. For example, the additional coil910may have a width of l1 and the interval901may be two times the width l1 or larger. Accordingly, an input part and an output part, that is, an input/output pattern may be also disposed within the interval901such that the additional coil910is disposed within the second coil520. The additional coil910may have the same purpose as or different purpose from that of the coils510to540. For example, when the coils510to540are for MST, the additional coil910may also be a coil for MST to supplement a null area, which will be described below in more detail. Alternatively, the additional coil910may be a coil for wireless charging or another type communication (for example, NFC communication).

That is, as described above, as the coils disposed on at least one layer have the opened loop form, another additional coil may be disposed within the coil of the opened loop form.

FIG. 9Bis a perspective view illustrating a structure in which the additional coil is disposed according to various embodiments of the present disclosure.

Referring toFIG. 9B, first additional coils921and922may be disposed on the inner side of other coils911and912according to an embodiment of the present disclosure. As described above, the coil912may have the opened loop form and, accordingly, input/output patterns925and926corresponding to the first additional coils921and922may be disposed on an interval according to the opened loop form of the coil912. In addition, the first additional coils921and922may be connected in a vertical direction through conductors, that is, via sets923and924. The coils911and912may be also connected in the vertical direction through via sets913and914. In addition, second additional coils931and932may be disposed on the outer side of the coils911and912, and may be connected in a vertical direction through via sets933and934. AlthoughFIG. 9Billustrates that sub coils are connected in parallel in the first additional coils921and922and the second additional coils931and932, this is only an example, and the sub coils may be connected in series in the first additional coils921and922and the second additional coils931and932to have same the structure ofFIG. 5.

FIG. 10Ais a plan view illustrating the first layer on which a plurality of coils are disposed according to various embodiments of the present disclosure. An MST coil1020may be disposed on the first layer. For example, the MST coil1020may have a winding form having five turns on the first layer and have the closed loop structure.

Referring toFIG. 10A, each start point of the MST coil1020may have the closed structure from the outside by a connection part1021connected to an end point. The MST coil1020may be connected to an MST coil1050on the second layer through a conductor, that is, a via set.

In addition, an additional MST pattern1024may be disposed on the first layer, and MST input/output patterns1025and1026for connecting an input terminal and an output terminal with the MST pattern1024or the MST coil1020may be further disposed on the first layer.

An NFC coil1010may be disposed on the first layer. Further, NFC input/output patterns1012and1013for connecting the NFC coil1010and the input/output terminals may be disposed. The NFC coil1010may be disposed on the outer side of the MST coil1020.

A wireless charging coil1030may be disposed on the inner side of the MST coil1020. The wireless charging coil1030may be manufactured to have a resonant frequency defined in an induction type (for example, WPC standard type) or a resonance type (for example, A4WP standard type). In addition, an NFC coil1011may be disposed on the inner side of the wireless charging coil1030. In addition, input/output terminal connection parts1041and1042for a temperature measuring circuit may be further disposed on the first layer. A dummy pattern1001may be disposed on the first layer. Further, an interval1002may be configured for separation between the NFC coil1010and the MST coil1020and separation between the MST coil1020and the wireless charging coil1030. The dummy pattern1101may prevent cracks which may be generated in each coil by compensating for a rigidity of a thin coil FPCB. The interval1002may reduce an effect of one coil on another. In addition, the NFC coil1010and the wireless charging coil1030may also be implemented in the structure including a plurality of sub coils connected in series through the conductor, that is, the via set.

FIG. 10Bis a plan view illustrating a second layer on which a plurality of coils are disposed according to various embodiments of the present disclosure. An MST coil1050may be disposed on the second layer. The MST coil1050on the second layer may be connected to the MST coil1020on the first layer in a vertical direction through the conductor, that is, the via set. MST input/output terminals1053and1054may be disposed on the second layer. The current may be applied to MST coils1020and1050and MST patterns1024,1052, and1055and then output through the MST input/output terminals1053and1054. A connection part1051of the MST coil1050cannot contact the other end and thus cannot be closed from the outside, and may have the opened loop form. As the MST coil1050has the opened loop form, a wireless charging coil1031may be connected to the input/output terminals through the interval of the MST coil1050. More specifically, wireless charging input/output patterns1032and1033may be disposed on the interval of the MST coil1050. The input/output terminals may be connected to patterns of a PCB by a connection part such as a C-CLIP. The input/output terminals may be interchanged according to a change in plus/minus pulse phases transmitted from a communication module. For example, one terminal operates as an input terminal for a minus phase and operates as an output terminal for a plus phase.

The wireless charging coil1031may be connected to the wireless charging coil1030disposed on the first layer through the conductor, that is, the via set. Further, the wireless charging coil1031may perform wireless charging by outputting the current corresponding to an external magnetic field or electromagnetic field. Alternatively, the wireless charging coil1031may induce the magnetic field by using the applied current or induce the electromagnetic field by forming a resonant circuit together with another coil, so as to wirelessly charge another electronic device. The wireless charging coil1031may be disposed on the inner side of the MST coil1050.

An NFC coil1012may be disposed on the second layer. The NFC coil1012may be connected to the NFC coil1010on the first layer through a conductor, that is, a via set. NFC patterns1013and1014may be also disposed on the second layer, and may be also connected to the NFC coil1010or the NFC input/output patterns1012and1013on the first layer in a vertical direction through the conductor, that is, the via set. NFC input/output terminals1016and1017may be connected to the NFC input/output patterns1012and1013in a vertical direction through the conductor, that is, the via set and, accordingly, the NFC input/output patterns1012and1013may be connected to NFC coils1010,1011,1012, and1015. The NFC coil1015may be disposed on the inner side of the MST coil1050, and may be connected to an NFC pattern1018as the MST coil1050has the opened loop form. A temperature measuring circuit1040and input/output terminals1043and1044for a temperature measuring circuit, which are connected to the input/output terminal connection parts1041and1042for the temperature measuring circuit on the first layer in a vertical direction through the conductors, that is, the via sets, may be disposed on the second layer. The temperature measuring circuit1040may measure a temperature by heat, may be generated when the current is applied to each coil, and deliver the measured temperature to a processor, and the processor may control the size of the applied current based on the received temperature. Accordingly, it is possible to prevent the coils from being overheated.

As described above, according to various embodiments of the present disclosure, a plurality of coils have a structure in which various coils such as the MST coil, the wireless charging coil, and the NFC coil are connected in a vertical direction through the conductors, that is, the via sets, thereby increasing inductance of each coil and thus guaranteeing effective wireless charging or good transmission/reception of signals.

FIG. 10Cis a plan view illustrating overlapping of the first layer structure ofFIG. 10Aand the second layer structure ofFIG. 10B. InFIG. 10C, a mark of “⋅” may indicate a conductor, that is, a via set, and the conductor is disposed on a position marked by “⋅” and connects corresponding structures of the first layer and the second layer. As illustrated inFIG. 10C, the MST coil disposed on the first layer and the MST coil disposed on the second layer may have a structure in which most parts thereof except for the connection parts1021and1051overlap each other. An overlapping relation in the connection parts1021and1051will be described in more detail with reference toFIGS. 11A to 11C. In addition, the structure in which most areas of a pattern of the first layer and a pattern of the second layer overlap each other is only an example, and the electronic device according to various embodiments of the present disclosure may have a structure in which the pattern of the first layer and the pattern of the second layer do not overlap each other.

FIGS. 11A to 11Care diagrams illustrating the connection relation in the connection parts of the coils according to various embodiments of the present disclosure.FIG. 11Ais a plan view illustrating some of the coils disposed on the first layer.

Referring toFIG. 11A, coils having the closed loop form may be disposed on the first layer. For example, a first coil1101, a third coil1103, a fifth coil1105, a seventh coil1107, and a ninth coil1109may be disposed on the first layer. The first coil1101may include a first connection part1102and a second connection part1111. AlthoughFIG. 11Aillustrates only particular parts of the coils and, accordingly, the first connection part1102and the second connection part1111seem like separated hardware, which are not connected to each other, the first connection part1102and the second connection part1111are connected to each other and constitute the first coil1101. In addition, the third coil1103may be disposed on the outer side of the first coil1101. The third coil1103may include a fifth connection part1104and a sixth connection part1112. The fifth coil1105may be disposed on the outer side of the third coil1103. The fifth coil1105may include a ninth connection part1106and a tenth connection part1113. The seventh coil1107may be disposed on the outer side of the fifth coil1105. The seventh coil1107may include a thirteenth connection part1108and a fourteenth connection part1114. The ninth coil1109may be disposed on the outer side of the seventh coil1107. The ninth coil1109may include a seventeenth connection part1110and an eighteenth connection part1115.

The first connection part1102, the fifth connection part1104, the ninth connection part1106, the thirteenth connection part1108, and the seventeenth connection part1110may have widths smaller than the winding pattern and have a form in which a width is reduced in an up direction of the winding pattern from the winding pattern. In addition, the second connection part1111, the sixth connection part1112, the tenth connection part1113, the fourteenth connection part1114, and the eighteenth connection part1115may have a form in which the width is reduced in a down direction from the winding pattern. Accordingly, for example, the fifth connection part1104and the sixth connection part1112may have a structure in which they do not overlap each other, and the two connection parts1104and1112may be disposed together within the width of one winding pattern. Further, in the remaining winding pattern except for the connection parts, a sufficiently thick width is secured, and thus resistance may be reduced and a strength of the applied current may increase.

Referring toFIGS. 11A and 11C, conductors, that is, via sets may be formed on the second connection part1111, the sixth connection part1112, the tenth connection part1113, the fourteenth connection part1114, and the eighth connection part1115. For example, the conductor connected to the sixth connection part1112may connect the sixth connection part1112and the second coil1127on the second layer. More specifically, the conductor of the sixth connection part1112may connect the sixth connection part1112and the third connection part1128of the second coil1127in a vertical direction. Further, the conductor of the tenth connection part1113may connect the tenth connection part1113and the seventh connection part1126of the fourth coil1125in a vertical direction. Further, the conductor of the fourteenth connection part1114may connect the fourteenth connection part1114and the eleventh connection part1124of the sixth coil1123in a vertical direction. Further, the conductor of the eighteenth connection part1115may connect the eighteenth connection part1115and the fifteenth connection part1122of the eighth coil1121in a vertical direction.

Referring toFIGS. 11B and 11C, the second connection part1111may receive the current from an input pattern1140, and the current may be applied to the first coil1101, and to the second coil1127through the fourth connection part1131along the conductor connected to the first connection part1101. Further, the conductor of the fourth connection part1131may connect the fourth connection part1131and the first connection part1102in a vertical direction. In addition, the current applied from the fourth connection part1131may be transferred to the third connection part1128after being applied to the second coil1127. Further, the conductor of the seventh connection part1126may connect the third connection part1128and the sixth connection part1112of the third coil1103in a vertical direction. Accordingly, the current input into the third connection part1128may be transferred to the sixth connection part1112of the third coil1103. The current input through the sixth connection part1112may be transferred to the fifth connection part1104after being applied to the third coil1103. The fifth connection part1104may be connected to the eighth connection part1132of the fourth coil1125. Accordingly, the fourth coil1125receives the current from the eighth connection part1132, and then the applied current may be transferred to the fifth coil1105through the seventh connection part1126. The current transferred from the input pattern1140disposed on the second layer may be transferred to the second connection part1111through the via set1141. According to the above described scheme, the current input through the second connection part1111may be sequentially applied in an order of the first coil1101, the second coil1127, the third coil1103, . . . , the eighth coil1121, and the ninth coil1109. In addition, the ninth coil1109may be connected to the tenth coil1135and, accordingly, the current may be applied to the tenth coil1135. Accordingly, the electronic device according to various embodiments of the present disclosure may dispose a coil with 10 turns in a space in which 5 turns are possible and the size of a magnetic field induced when the same current is applied may increase according to the number of turns.

The conductors, that is, first via sets that connect the second coil1127, the fourth coil1125, the sixth coil1123, and the eighth coil1121with the third coil1103, the fifth coil1105, the seventh coil1107, and the ninth coil1109, respectively may be adjacent to each other. Further, the conductors, that is, second via sets that connect the second coil1127, the fourth coil1125, the sixth coil1123, and the eighth coil1121with the first coil1101, the third coil1103, the fifth coil1105, and the seventh coil1107, respectively may be adjacent to each other. Directions of currents flowing in the first via sets may be the same, directions of currents flowing in the second via sets may be the same, and the directions of the currents flowing in the first via sets may be different from the directions of the currents flowing in the second via sets. Accordingly, via sets in which the currents flow in the same direction may be adjacent to each other, thereby maximizing strengths of induced magnetic fields formed by the first via sets and the second via sets.

Hereinafter, a performance of the coil according to various embodiments of the present disclosure will be compared with a performance of the coil according to a comparative example. First, a coil structure according to the comparative example will be described with reference toFIGS. 12A and 12B.

Referring toFIG. 12A, in the structure according to the comparative example, a coil1210with 2 turns may be disposed on a first layer (1-layer). A coil1220with 2 turns may be disposed on a second layer (2-layer), and the two coils1210and1220may be connected in parallel. Such a structure may be named a parallel type coil. In the parallel type coil, when the two coils1210and1220are connected by a pair of via sets, it may be construed equally as a short conducting wire if resistance is very small. Accordingly, the current may be applied to only one coil rather than to two coils having small resistance, which may act as a problem.

Referring toFIG. 12B, in the structure according to the comparative example, a coil1230with 2 turns may be disposed on a first layer (1-layer). A coil1240with 2 turns may be disposed on a second layer (2-layer), and the two coils1230and1240may be connected in series through a conductor1241. Such a structure may be named a cascade type coil. The cascade type coil can be designed when the number of turns of the coil disposed on each layer is singular, but the design may be difficult if the number of turns of the coils disposed on each layer is plural. As illustrated inFIG. 12B, in order to connect the coil1230on the first layer and the coil1240on the second layer in the cascade type coil structure in series, the conductor1241should be manufactured in an inwardly bent form, which requires a very difficult design scheme in that the via set can be designed only in a vertical direction. Alternatively, in order to manufacture the cascade type coil, one additional layer for changing a direction of the conductor should be inserted between the first layer and the second layer, which results in increasing a mounting thickness.

In contrast to the comparative examples according toFIGS. 12A and 12B, a first coil with one winding on the first layer may be connected to a second coil with one winding on the second layer in series, the second coil on the second layer may be connected to a third coil with one winding on the first layer, and the third coil may be connected to a fourth coil with one winding on the second layer in the structure according to the present disclosure. The structure according to present disclosure may be named a spiral type coil.

Table 1 below corresponds to a table for a comparison between electrical characteristics of the coils according to the comparative examples and the coil, that is, the spiral type coil according to an embodiment of the present disclosure.

TABLE 1ThicknessInductanceResistanceCoil type(mm)(uH)(ohm)Parallel type coil122.817.91.873Cascade type coil122.017.91.495Spiral type coil (coil122.017.891.432according to the embodimentof the present disclosure)

All materials of the coils in Table 1 above are the same and are disposed within the same space. As noted throughFIG. 1, resistance of the parallel type coil is the highest and inductances may have similar values.

FIG. 13is a graph of an MST signal recognition success rate according to various embodiments of the present disclosure.

Referring toFIG. 13, an area indicated by reference numeral “1301” may refer to the recognized area according to the embodiment of the present disclosure, which corresponds to an area having a success rate larger than a preset threshold. Reference numeral “1302” refers to the recognized area for the cascade type coil, and reference numeral “1303” refers to the recognized area for the parallel type coil. The recognized area may be area of which strength of received signal is larger than predetermined threshold. As noted throughFIG. 13, the spatial area of the recognized area of the coil according to the embodiment of the present disclosure may be the largest, which may mean that a coil recognizable range according to the present disclosure is the widest. Particularly, as shown in Table 1 above, the coil according to the embodiment of the present disclosure has the widest recognition success area by the coil even though inductances of the coil according to the embodiment of the present disclosure and the remaining coils have similar values, which may mean that the magnetic field additionally formed by the conductor, that is, the via set distributes to the recognition success. Table 2 below shows recognition success rates according to a distance between the electronic device and the POS terminal.

As noted through Table 2 above, the coil according to the embodiment of the present disclosure has a higher recognition success rate than that of the coil according to the comparative example. Particularly, as shown in Table 1 above, the coil according to the embodiment of the present disclosure has the highest recognition success rate even though inductances of the coil according to the embodiment of the present disclosure and the remaining coils have similar values, which may mean that the magnetic field additionally formed by the conductor, that is, the via set contributes to the recognition success.

FIGS. 14A to 14Cillustrate a coil in a three layered structure according to various embodiments of the present disclosure.FIG. 14Aillustrates a pattern of a first layer,FIG. 14Billustrates a pattern of a second layer, andFIG. 14Cillustrates a pattern of a third layer. InFIGS. 14A to 14C, a description of the part that overlapsFIGS. 10A and 10Bwill be omitted. InFIGS. 14A to 14C, forms of connection parts in the three layered structure will be mainly described.

As illustrated inFIG. 14A, an MST coil1400may include a first connection part1401and a second connection part1402. The first connection part1401may have a form in which a width relatively decreases from a winding pattern to a lower end of the winding pattern. The second connection part1402may have a form in which a width relatively decreases from the winding pattern to a center of the winding pattern. In addition, the MST coil1410on the second layer may include a third connection part1411and a fourth connection part1412. The third connection part1411may have a form in which a width relatively decreases from the winding pattern to a center of the winding pattern. The fourth connection part1412may have a form in which a width relatively decreases from the winding pattern to an upper end of the winding pattern. In addition, a conductor, that is, a via set formed on the second connection part1402may connect the third connection part1411and the second connection part1402in a vertical direction. In addition, the MST coil1420on the third layer may include a fifth connection part1421and a sixth connection part1422. The fifth connection part1421may have a form in which a width relatively decreases from the winding pattern to an upper end of the winding pattern. The sixth connection part1422may have a form in which a width relatively decreases from a winding pattern to a lower end of the winding pattern. A conductor, that is, a via set formed on the fifth connection part1421may connect the fifth connection part1421and the fourth connection part1412in a vertical direction. In addition, a conductor, that is, a via set formed on the sixth connection part1422may connect the sixth connection part1422and the first connection part1401in a vertical direction. Accordingly, the MST coil1420on the third layer is connected to the MST coil1400on the first layer, and the innermost coil on the third layer may be connected to a second inner coil on the first layer. Accordingly, as illustrated inFIGS. 14D and 14E, an order of the connected coils may be the innermost coil on the first layer, the innermost coil on the second layer, and the innermost coil on the third layer, and the innermost coil on the third layer may be connected to the second inner coil on the first layer.FIG. 14Eillustrates parts enlarged from connection parts ofFIG. 14D. As illustrated inFIG. 14E, a seventh connection part1461of the coil on the first layer may be connected to a current source through a conductor1463. A current supplied through the seventh connection part1461may be applied to the innermost coil on the first layer. The current applied to the innermost coil on the first layer may be applied to an eighth connection part1462. A conductor1474formed on the eighth connection part1462may connect the eighth connection part1462with a ninth connection part1471of the innermost coil on the second layer. Accordingly, the current applied to the innermost coil on the first layer may be applied to the innermost coil on the second layer through the conductor1474. The current applied to the innermost coil on the second layer may be applied to a tenth connection part1472. A conductor1481formed on the tenth connection part1472may connect the tenth connection part1472with an eleventh connection part1481of the innermost coil on the third layer. Accordingly, the current applied to the innermost coil on the second layer may be applied to the innermost coil on the third layer through the conductor1481. The current applied to the innermost coil on the third layer may be applied to a twelfth connection part1482. A conductor1487formed on the twelfth connection part1482may connect the twelfth connection part1482with a thirteenth connection part1491of a coil adjacent to the outer side of the innermost coil on the first layer. Accordingly, the current applied to the innermost coil on the third layer may be applied to the coil adjacent to the outer side of the innermost coil on the first layer. As a result, an order of coils to which the current is applied or a coil connection order may be C11, C21, C12, C22, C31, C32, . . . . In Cij, i may denote a layer and j may denote an order of the disposition from the inner side. For example, C21may be a first coil from the inner side on the second layer, and C32may be a second coil from the inner side on the third layer.

In addition, a width of the winding pattern of the MST coil may further increase in comparison with the width of the winding pattern on two layers. This may be caused from connection parts1451,1452, and1453in a form in which widths decrease in three directions with respect to one winding pattern1450as illustrated inFIG. 14F. That is, since the connection parts1451,1452, and1453have three forms and the widths of the connection parts1451,1452, and1453should be sufficiently secured, the width of the winding pattern1450may be wider than that of the winding pattern on two layers. However, as the width of the winding pattern increases, the number of turns on three layers may be smaller than the number of turns on two layers. For example, inFIGS. 14A to 14C, the number of turns of the coil on each layer may be 4, which may be smaller than the number of turns inFIGS. 10A and 10Bthat is 5. However, the total number of turns of the coils on the three layers may be 4×3=12 and the total number of turns of the coils on the two layers may be 5×2=10, so that the total number of turns of the coils on the three layers may be larger. As the total number of turns increases, inductance may also increase. Further, as the width of the winding pattern is wider compared to the coil on the second layer, resistance of the winding pattern may decrease and thus size of the applied current may increase. In addition, intervals1423and1424between coils are provided, thereby minimizing interference of each coil. As described above, the coils according to various embodiments of the present disclosure may be implemented in the three layered structure, and there is no limitation in the number of layers of the coils.

FIGS. 15A and 15Bare graphs of recognition success rates according to a location for a comparison between performances of the coils in the three layered structure according to various embodiments of the present disclosure and the coils in the three layered structure according to the comparative example. Table 3 below illustrates a comparison between electrical characteristics of the coils according to the comparative example and the coil, that is, the spiral type coil according to the embodiment of the present disclosure.

TABLE 3ThicknessInductanceResistanceCoil type(mm)(uH)(ohm)Cascade type coil137.525.001.567Spiral type coil (coil136.025.101.576according to the embodimentof the present disclosure)

All materials of the coils in Table 3 above are the same and are disposed within the same space. As noted through Table. 3, resistances and inductances of the two coils may have similar values.

In addition, each of an x axis value and a y axis value may indicate a coordinate with respect to a distance and may have a unit, for example, cm inFIGS. 15A and 15B. The origin may indicate, for example, a center point of the coil of the POS terminal. That is, inFIGS. 15A and 15B, the coordinate (a, b) may mean that the electronic device according to the present disclosure is disposed to the right side by a cm and to the upper side by b cm from the center of the coil of the POS terminal.FIG. 15Aillustrates a result of recognized area. For example, an area indicated by reference numeral “1501” ofFIG. 15Amay refer to a recognized area according to an embodiment of the present disclosure, which corresponds to an area having a success rate larger than a preset threshold. Reference numeral “1502” indicates a recognized area for the cascade type coil. As noted throughFIG. 15A, the spatial area of the recognized area of the coil according to the embodiment of the present disclosure may be larger, which may mean that a coil recognizable range according to the present disclosure is relatively wide. For example, as shown in Table 3, the coil according to the embodiment of the present disclosure has the wider recognition success area even though inductances and resistances of the cascade type coil according to the embodiment of the present disclosure and the remaining coils have similar values, which may mean that the magnetic field additionally formed by the conductor, that is, the via set distributes to the recognition success. For example, it is noted that the recognition success rate relatively becomes higher in the center and, accordingly, a sufficient size magnetic field is formed in a null area.

In addition,FIG. 15Billustrates a recognition success rate of the coils in the two layered structure and the coils in the three layered structure according to the present disclosure. InFIG. 15B, an area indicated by reference numeral “1511” refers to a recognized area for the coils in the three layered structure according to an embodiment of the present disclosure and an area indicated by reference numeral “1512” refers to a recognized area for the coils in the two layered structure according to an embodiment of the present disclosure. As noted inFIG. 15B, the spatial area of the recognized area of the coils in the three layered structure may be larger, which may mean that a recognizable range of the coils in the three layered structure according to the present disclosure is relatively wider than that of the coils in the two layered structure. This may be associated with the coils in the three layered structure that have higher inductance than that of the coils in the two layered structure.

Table 4 below shows recognition success rates according to a distance between the electronic device and the POS terminal.

As noted through Table 4 above, the coil according to the embodiment of the present disclosure has a higher recognition success rate than that of the coil according to the comparative example and, in particular, the coils in the three layered structure may have a higher recognition success rate than that of the coils in the two layered structure. For example, as shown in Table 3 above, the coil according to the embodiment of the present disclosure has the highest recognition success rate even though inductances of the coil according to the embodiment of the present disclosure and the cascade type coil have similar values, which may mean that the magnetic field additionally formed by the conductor, that is, the via set distributes to the recognition success.

FIGS. 16A and 16Billustrate coils disposed on a wearable electronic device, for example, a wrist watch type wearable electronic device. The wrist watch type wearable electronic device may have, for example, a circular housing.

Referring toFIG. 16A, a first MST coil1610may be disposed on a first layer1600. As illustrated inFIG. 16B, a second MST coil1630may be disposed on a second layer1640. In addition, the first MST coil1610may be connected to the second MST coil1630through a first conductor1621, that is, a via set, and the second MST coil1630may be also connected to the first MST coil1610through a second conductor1641, that is, a via set. The first MST coil1610and the second MST coil1630may have a circular winding form. That is, the first MST coil1610and the second MST coil1630may have a winding form corresponding to the housing form

In addition, the first MST coil1610may be connected to an input/output terminal1602through an input/output pattern1611, and the second MST coil1630may be connected to an input/output terminal1603through an input/output pattern1631. In addition, the first MST coil1610may have a closed loop form, and the second MST coil1630may have an opened loop form. Accordingly, an additional coil may be further disposed on the inner side of the first MST coil1610and the second MST coil1630, and an input/output pattern for the additional coil may be disposed between a start point and an end point of each of the second MST coils1630. In the embodiments ofFIGS. 16A and 16B, a width of the winding pattern may be 0.4 mm and the number of turns on each layer may be 9. Accordingly, the total number of turns of coils may be 18. In addition, as described in connection withFIG. 5, the connection relation of coils may have the spiral form in which the end point of the coil on the first layer is connected to the start point of the coil on the second layer through the via set and the end of the coil on the second layer is connected to the start point of the next coil on the first layer through another via set.

FIGS. 17A to 17Cillustrate coils in a three layered structure according to various embodiments of the present disclosure.

Referring toFIG. 17A, a first MST coil1710may be disposed on a first layer1700, a second MST coil1731may be disposed on a second layer1740, and a third MST coil1752may be disposed on a third layer1770. The first MST coil1710may be connected to an input/output terminal1702through an input/output pattern1711, and the third MST coil1752may be connected to an input/output terminal1705through an input/output pattern1751. The first MST coil1710may be connected to the second MST coil1731through a first conductor1721, the second MST coil1731may be connected to the third MST coil1752through a second conductor1732, and the third MST coil1752may be connected to the first MST coil1710through a third conductor1753. InFIGS. 17A to 17C, a width of the winding pattern may be 0.8 mm and the number of turns on each layer may be 14. Accordingly, the total number of turns of coils may be 42. In addition, an FPCB on which the coils ofFIGS. 17A to 17Care disposed may be implemented to have the same thickness as that of the FPCB on which the coils ofFIGS. 16A and 16Bare disposed. Since the width of the winding pattern is 0.8 mm, which is wider than that ofFIGS. 16A and 16B, a resistance may remain in the similar value even though the whole coil becomes longer. That is, the coils ofFIGS. 17A to 17Cmay have a relatively high inductance while having a similar resistance to that of the coils ofFIGS. 16A and 16B.

FIGS. 18A and 18Billustrate recognition success rates according to a location for a comparison between performances of circular coils in the two layered structure and circular coils in three layered structure according to various embodiments of the present disclosure. Table 5 below illustrates a comparison between electrical characteristics of the circular coils in the two layered structure and the circular coils in the three layered structure.

All materials of the coils in Table 5 above are the same and are disposed within the same space. As noted throughFIG. 5, resistances of the two coils may have similar values. That is, even though the total length of circular coils in the three layered structure is relatively longer than the circular coils in the two layered structure, as a width is relatively larger, the resistance may remain in the similar value.

FIGS. 18A and 18Billustrate results of recognized area according to various embodiments. For example, areas indicated by reference numerals “1801” and “1802” ofFIG. 18Amay refer to recognized areas according to the circular coils in the two layered structure, which correspond to areas having a success rate larger than a preset threshold. Reference numerals “1811” and “1812” indicate recognized areas for the circular coils in the three layered structure. As noted throughFIG. 18B, the spatial area of the circular coils in the three layered structure according to the embodiment of the present disclosure may be larger, which may mean that a coil recognizable range according to the present disclosure is relatively wide. In particular, it is noted that the recognition success rate relatively becomes higher in the center and, accordingly, a sufficient size magnetic field is formed in a null area. Further, an effect of the magnetic field by the conductor, that is, the via set can be identified in that the recognition success rate in left and right areas of the center is higher inFIGS. 18A and 18B.

Table 6 below shows recognition success rates according to a distance between the electronic device and the POS terminal.

As noted through Table 6, the recognition success rate larger than 60% can be acquired even in the distance of 3 cm, which is a recommended MST distance, and good transmission/reception of the MST signal can be guaranteed even in a small electronic device such as a wearable electronic device.

FIGS. 19 and 20illustrate circular coils in various two layered and three layered structures according to the present disclosure. The circular coils ofFIGS. 19 and 20may be disposed in a particular direction based on the housing.

Referring toFIG. 19, it is noted that input/output terminals1901and1902and input/output patterns1911and1912lean to a particular direction. Accordingly, first via sets1921to1929to which the current is applied in a first direction, and second via sets1931to1939to which the current is applied in a second direction may also lean in a particular direction. Directions of magnetic fields formed by the first via sets1921to1929and the second via sets1931to1939may also head in a particular direction. Accordingly, the circular coils may be designed to be arranged in at a particular direction to allow the magnetic fields formed by the via sets to direct at the POS terminal according to a way in which the user makes the wearable electronic device approach the POS terminal while wearing the wearable electronic device.

Referring toFIG. 20, input/output terminals2001and2002and input/output patterns2011and2012lean to a particular direction in the coils in the three layered structure. Further, via sets2020to which the current is applied in a first direction and via sets2030to which the current is applied in a second direction may also direct at a particular direction. Accordingly, induced magnetic fields formed by the via sets2020and2030may also head in a particular direction.

As illustrated inFIGS. 19 and 20, the coils according to various embodiments of the present disclosure may form not only the magnetic field by the circular coils but also the magnetic field by the conductor, that is, the via set disposed in a direction perpendicular to the circular coils, and also control a directed direction of the formed magnetic field by controlling a location of the via set.

FIG. 21is a block diagram of an electronic device according to various embodiments of the present disclosure.

As illustrated inFIG. 21, the electronic device may include coils disposed on a plurality of layers, for example, a coil2110byFIG. 5. In the embodiment ofFIG. 21, the coil2110is used as the MST coil. The coil2110may be connected to a driver2120. The driver2120may include a charge pump circuit and an over current protection (OCP) circuit. The charge pump circuit cannot produce power by itself, but may receive power from another power provider2130. The power providing circuit unit2130may include a power switch circuit for preventing direct connection to a battery and may be enabled by a controller2153. The driver2120may receive the current from the power provider2130, receive MST data from a processor2150, for example, an MST data generator2152and then may be automatically enabled. The driver2120may generally have one input and output terminal, which may be divided into two input and output terminals by an internal logic of the driver2120. The driver2120may apply input/output signals2111and2112, that is the current to the coil2110, and the coil2110may induce an induced magnetic field according to the applied current. The driver2120may be a circuit which can generate an output current based on amplification of MST data and an input pulse signal.

A card code manager2151may be a logic part for encrypting and managing card information registered by the user. The MST data generator2152may be a logic part for receiving card encryption information from the card code manager2151and generating a signal for payment based on the card encryption information. A profile identifier2154may be a logic part for performing authentication processing on user input information based on a user profile. A profile manager2155may be a logic part for generating a profile and managing a pre-stored user profile. A sensor2140may be a circuit for acquiring user biometric information such as a fingerprint, HRM, touch, and image. More specifically, the sensor2140is a circuit for acquiring user approval information required during a payment process, and may be implemented in various forms such as an image acquisition circuit for acquiring an image for face recognition, finger recognition, and iris recognition, a touch screen for recognizing a finger, ear shape, and hand pattern, electrodes for ECG recognition and HRM recognition, and a microphone for voice recognition.

When a payment application is executed, the electronic device may acquire card information form the card code manager2151. The electronic device may acquire user biometric information from the sensor2140. The profile identifier2154may perform user authentication by using the user biometric information and the card information. When the user is authenticated, the MST signal generator2152may generate an MST signal. The driver2120and the power provider2130may transmit the generated MST signal to the coil2110. The coil2110may induce the induced magnetic field in accordance with the received MST signal. The MST signal may be a signal changing according to time and, accordingly, a strength of the induced magnetic field induced from the coil2110may also change according to time. The POS terminal may recognize the induced magnetic field having the strength changing according to time and, accordingly, perform payment or relay payment information to the server. In this document, the MST signal may be also named a magnetic signal and, in this case, the MST signal generator2152may be named a magnetic signal generating circuit.

FIG. 22is a rear perspective view illustrating the electronic device when a case2201of the electronic device is opened according to various embodiments of the present disclosure.

A housing2220may be disposed on the rear surface of the electronic device. A first NFC coil2270may be disposed at the center of the housing2220, and a wireless charging coil2260may be disposed on the outer side of the first NFC coil2270. An MST coil2280may be disposed on the outer side of the wireless charging coil2260. A second NFC coil2290may be disposed on the outer side of the MST coil2280. A dummy pattern2210may be disposed on the outer side of the second NFC coil2290. In addition, although coils on the rear surface are illustrated as being disposed on a single layer, the coils may be implemented in a structure including a multi-layer structure and conductors in a vertical direction, for example, the structure ofFIG. 5. A battery2250may be disposed below the second NFC coil2290. The housing2220may be cut off at the part where the battery2250is disposed. A camera2230and a sensor2240may be disposed above the second NFC coil2290. An FPCB on which the MST coil2280is disposed may adhere to the housing2220or the battery2250. In order to avoid overlapping between the FPCB and elements such as the camera2230and the sensor2240, a coil pattern may be implemented by a bypass design. Another member may be adhered to at least one of the upper surface and the lower surface of the FPCB. For example, a heat radiating material (for example, a graphite sheet) for preventing thermal diffusion or a shielding material (for example, a shielding sheet) for preventing another element from being damaged by a strong induced magnetic field may be adhered to at least one of the upper surface and the lower surface of the FPCB. A protection film for preventing damage of the FPCB may be adhered to at least one of the upper surface and the lower surface of the FPCB.

FIG. 23is a cross-sectional view illustrating an electronic device according to various embodiments of the present disclosure.

Referring toFIG. 23, a display2352may be disposed relatively on the lower side of the electronic device. A bracket2351may be disposed above the display2352and a camera2341may be displayed on the bracket2351. In addition, a receiver2342may be disposed beside the display2352and the bracket2351. A PCB2352on which a plurality of devices are mounted and a battery2330may be disposed above the bracket2351. A housing2331may be disposed above the PCB2352. Coils2302,2311,2312, and2303may be disposed above the housing2331and the battery2330. For example, the coils2302and2303may be MST coils, and the coils2311and2312may be wireless charging coils. As illustrated inFIG. 23, the coils2302,2311,2312, and2303may have a structure of multiple layers, and a conductor for connecting layers, that is, a via set, which is not illustrated, may be disposed. In addition, the electronic device may further include an additional pattern2301for securing an additional magnetic field strength. A protection film2321may be disposed on the coils2302,2311,2312, and2303, and a cover (for example, glass) may be disposed on the protection film2321. In addition, an adhesive layer2324, a graphite sheet2323, and a protection sheet2322may be disposed between the battery2330and the coils2302,2311,2312, and2303. A bracket2331may be disposed beside the electronic device and protect internal devices.

FIG. 24illustrates laminated structures of FPCBs on which coils in a two layered structure and coils in a three layered structure are disposed according to various embodiments of the present disclosure.

Referring toFIG. 24A, in the coils in the two layered structure, a substrate (base) includes a polyimide film (PI) and copper layers (Cu) disposed on both sides of the polyimide film (PI). According to an embodiment, a thickness of the polyimide film (PI) may be 12.5 mm, and a thickness of each of the copper layers (Cu) may be 35 mm. Plating layers (plating) may be disposed on both sides of the substrate (base) and may include, for example, copper plating layers (Cu-plating). The plating layer (plating) may have a thickness, for example, 10 mm. Cover films (covery) may be disposed above the upper plating layer (plating) and below the lower plating layer (plating). The cover film (covery) may include an adhesive layer (adhesive) for adhesion with the plating layer (plating) and a polyimide film (PI). For example, the adhesive layer (adhesive) may have a thickness of 5 mm, and the polyimide film (PI) may have a thickness of 5 mm. In addition, not illustrated, a conductor, that is, a via set for connecting the copper layers (Cu) in a vertical direction may be formed, and the via set may connect the copper layers (Cu) through an opening formed on the polyimide film (PI) disposed between the copper layers (Cu).

Referring toFIG. 24B, a substrate (base) including two copper layers (Cu) and a substrate (base) including one copper layer (Cu) may be disposed on the FPCB including coils in the three layered structure. For example, one substrate (base) may include a polyimide film (PI) and two copper layers (Cu) disposed on both sides of the polyimide film (PI). The other substrate (base) may include a polyimide film (PI) and a copper layer (Cu) disposed below the polyimide film (PI). The copper layers (Cu) may have a thickness of 18 mm each, and the polyimide film (PI) may have a thickness of 12.5 mm. In addition, an adhesive layer (bond_s or adhesive) may be disposed between the two substrates (base) to connect them and may have a thickness of, for example, 13 mm. In addition, a plating layer (plating) may be disposed above the copper layer (Cu) of one substrate (base), and the plating layer (plating) may include, for example, a copper plating layer (Cu-plating). The plating layer (plating) may have a thickness of, for example, 10 mm. Further, the plating layer (plating) may be disposed below the copper layer (Cu) of the other substrate (base), and the plating layer (plating) may include, for example, a copper plating layer (Cu-plating). Cover films (covery) may be disposed above the upper plating layer (plating) and below the lower plating layer (plating). The cover film (covery) may include an adhesive layer (adhesive) for adhesion with the plating layer (plating) and a polyimide film (PI). For example, the adhesive layer (adhesive) may have a thickness of 5 mm, and the polyimide film (PI) may have a thickness of 5 mm.

FIG. 25is a plan view illustrating a coil pattern according to various embodiments of the present disclosure.

Referring toFIG. 25, the electronic device according to the present disclosure may include an MST coil2530. An NFC coil2540may be disposed on the outer side of the MST coil2530, and a wireless charging coil2510may be disposed on the inner side of the MST coil2530. In addition, a magnetic field strength may be relatively weak at the center of the MST coil2530and, in this case, a null area may be generated. Accordingly, the electronic device according to various embodiments of the present disclosure may further include an additional MST coil2520disposed on the inner side of the wireless charging coil2510to compensate for the null area. The generation of the null area may be prevented by the magnetic field of the additional MST coil2520.

Each of the components of the electronic device according to the present disclosure may be implemented by one or more components and the name of the corresponding component may vary depending on a type of the electronic device. In various embodiments, the electronic device 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 electronic device may further include additional elements. Further, some of the components of the electronic device according to the various embodiments of the present disclosure may be combined to form a single entity, and thus, may equivalently execute functions of the corresponding elements prior to the combination.

According to various embodiments, at least some of the devices (for example, modules or functions thereof) or the method (for example, 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 (for example, the processor120), the one or more processors may execute a function corresponding to the command. The computer-readable storage medium may be, for example, the memory130.

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 of the present disclosure may be executed sequentially, in parallel, repeatedly, or in a heuristic manner. Further, some operations may be executed according to another 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 is intended that all modifications and changes or modified and changed forms based on the present disclosure fall within the scope of the present disclosure as defined by the appended claims and their equivalents.