Patent Description:
Wireless charging or contactless charging technology has been developed and applied to various electronic devices.

The wireless charging technology makes it possible to charge the battery of an electronic device without connecting the same to a wired charger such that, for example, simply by placing a smartphone or a wearable device on a charging pad or charging cradle, the battery thereof can be charged.

The wireless charging technology has also been applied between an electronic device and another electronic device. For example, a first electronic device may operate in a Tx mode in which power is transmitted wirelessly by using power in the battery included in the first electronic device, and a second electronic device may operate in a Rx mode in which power is wirelessly received from the first electronic device.

Various types of wireless charging technologies exist, and a magnetic induction type and a magnetic resonance type, for example, have been introduced. The magnetic induction type has a higher level of charging efficiency than the magnetic resonance type, but may have a narrower charging range in which wireless charging is possible. The magnetic resonance type has a lower level of charging efficiency than the magnetic induction type, but has a wider changing range in which wireless charging is possible, thereby enabling charging at a longer distance.

<CIT> discloses an electronic apparatus that comprises: at least one antenna; a first circuit for wirelessly receiving or transmitting power by using at least one part of the at least one antenna; a second circuit for performing at least one communication by using at least one part of the at least one antenna; a first electrical path for connecting the at least one antenna to the first circuit; a second electrical path for connecting the at least one antenna to the second circuit; a third electrical path for connecting a point on the first electrical path to a point on the second electrical path; and at least one passive element or active element connected to at least one of the first electrical path, the second electrical path, and the third electrical path.

<CIT> discloses an electronic device comprising: a first cover constituting the front surface of the electronic device; a second cover constituting the rear surface of the electronic device; a memory included in a space formed between the first cover and the second cover; a processor included in the space and electrically connected with the memory; a first antenna and a second antenna included in the space and electrically connected with the processor; and a switch included in the space and connected to the first antenna and/or the second antenna, wherein the memory can include, during execution, instructions for: allowing the first antenna and the second antenna to be connected by shorting the switch when the processor executes a function corresponding to the first antenna; and allowing the first antenna and the second antenna to transmit magnetic field signals together.

<CIT> discloses a wireless power transmission apparatus including: first coils receiving electric power from an AC power supply for trans mitting the electric power to a power reception apparatus; and a controller selecting, from the first coils, a coil to be used for transmission of electric power to the power reception apparatus, based on a position of the power reception apparatus. The first coils are each configured to be switchable between a first state in which electric power can be transmitted to the power reception apparatus and a second state in which efficiency in transmission of electric power to the power reception apparatus is lower than the first state. The controller sets a coil in the first state that is selected to be used for transmission of electric power, and sets a coil in the second state that is not to be used for transmission of electric power.

Electronic devices mass-produced so far support the magnetic induction type only. Therefore, there may be a need for research/development regarding electronic devices supporting both the magnetic induction type and the magnetic resonance type, thereby improving compatibility with charging environments, and capable of utilizing advantages of each of the magnetic induction type and the magnetic resonance type.

Various embodiments of the disclosure may provide an electronic device capable of wireless charging by using both the magnetic induction type and the magnetic resonance type, thereby improving the wireless charging efficiency.

Technical problems to be solved by the disclosure are not limited to the above-mentioned technical problems, and other technical problems not mentioned herein will be clearly understood from the following description by those skilled in the art to which the disclosure pertains.

An electronic device according to various embodiments of the disclosure may include a battery, a charging circuit, and a circuit board configured to be electrically connected to the charging circuit for providing the charging power, the circuit board including a first portion and a second portion disposed adjacent to the first portion, wherein a first coil, a second coil, and a resonance coil are disposed in the first portion of the circuit board, the first coil being disposed outside the second coil, and the resonance coil being disposed inside the second coil, and wherein a third coil and a resonance capacitor are disposed in the second portion of the circuit board, the resonance capacitor being disposed inside the third coil, and the resonance coil and the resonance capacitor being electrically connected to each other to generate a designated resonance such that an external electronic device transmitting wireless power to the electronic device detect the generated resonance, and wherein the resonance coil and the resonance capacitor are not electrically connected to the first coil to the third coil.

A circuit board on which a coil for wireless charging of an electronic device is disposed according to various embodiments of the disclosure may include a first portion and a second portion disposed adjacent to the first portion, wherein a first coil, a second coil, and a resonance coil are disposed in the first portion, the first coil being disposed outside the second coil and the resonance coil being disposed inside the second coil, and wherein a third coil and a resonance capacitor are disposed in the second portion, the resonance capacitor being disposed inside the third coil, and the resonance coil and the resonance capacitor being electrically connected to each other to generate a designated resonance such that an external electronic device transmitting wireless power to the electronic device detect the generated resonance, and wherein the resonance coil and the resonance capacitor are not electrically connected to the first coil to the third coil.

An electronic device according to various embodiments of the disclosure is capable of wireless charging by using both the magnetic induction type and the magnetic resonance type, thereby having excellent compatibility with wireless charging equipment or environment.

An electronic device according to various embodiments may improve charging efficiency during wireless charging.

Various other advantageous effects identified directly or indirectly through the disclosure may be provided.

Referring to <FIG>, the electronic device <NUM> in the network environment <NUM> may communicate with an electronic device <NUM> via a first network <NUM> (e.g., a short-range wireless communication network), or at least one of an electronic device <NUM> or a server <NUM> via a second network <NUM> (e.g., a long-range wireless communication network). According to an embodiment, the electronic device <NUM> may include a processor <NUM>, memory <NUM>, an input module <NUM>, a sound output module <NUM>, a display module <NUM>, an audio module <NUM>, a sensor module <NUM>, an interface <NUM>, a connecting terminal <NUM>, a haptic module <NUM>, a camera module <NUM>, a power management module <NUM>, a battery <NUM>, a communication module <NUM>, a subscriber identification module(SIM) <NUM>, or an antenna module <NUM>. In some embodiments, at least one of the components (e.g., the connecting terminal <NUM>) may be omitted from the electronic device <NUM>, or one or more other components may be added in the electronic device <NUM>. In some embodiments, some of the components (e.g., the sensor module <NUM>, the camera module <NUM>, or the antenna module <NUM>) may be implemented as a single component (e.g., the display module <NUM>).

A corresponding one of these communication modules may communicate with the external electronic device via the first network <NUM> (e.g., a short-range communication network, such as Bluetooth™ wireless-fidelity (Wi-Fi) direct, or infrared data association (IrDA)) or the second network <NUM> (e.g., a long-range communication network, such as a legacy cellular network, a <NUM> network, a next-generation communication network, the Internet, or a computer network (e.g., LAN or wide area network (WAN)).

<FIG> is a block diagram schematically illustrating a wireless charging system according to various embodiments.

Referring to <FIG>, a wireless charging system <NUM> according to various embodiments may include a wireless power receiver (hereinafter, referred to as a first electronic device <NUM>) and/or a wireless power transmitter (hereinafter, referred to as a second electronic device <NUM>).

According to an embodiment, the first electronic device <NUM> and the second electronic device <NUM> may perform short-range communication through a magnetic field. According to an embodiment, the short-range communication may include near field communications (NFC), magnetic secure transmission (MST) communications, and/or wireless charging. For example, the first electronic device <NUM> and the second electronic device <NUM> may perform NFC communication through a magnetic field. For example, the first electronic device <NUM> and the second electronic device <NUM> may perform MST communication. For example, the first electronic device <NUM> and the second electronic device <NUM> may transmit or receive power through a wireless charging method.

According to an embodiment, the wireless charging may include at least one of an electromagnetic induction method, a magnetic resonance method, and/or an RF/micro-wave radiation method.

According to various embodiments, in order for the first electronic device <NUM> to receive power from the second electronic device <NUM>, the wireless charging method of the first electronic device <NUM> may need to coincide with (match) the wireless charging method of the second electronic device <NUM>. For example, based on the matching between the wireless charging method of the second electronic device <NUM> and the wireless charging method of the first electronic device <NUM> in the electromagnetic induction method, the first electronic device <NUM> may receive power in the electromagnetic induction method. As another example, based on the matching between the wireless charging method of the second electronic device <NUM> and the wireless charging method of the first electronic device <NUM> in the magnetic resonance method, the first electronic device <NUM> may receive power in the magnetic resonance method.

According to various embodiments, in order for the second electronic device <NUM> and the first electronic device <NUM> to perform short-range communication (e.g., wireless charging) through a magnetic field, the first electronic device <NUM> may be disposed to be adjacent to the second electronic device <NUM>. According to an embodiment, the first electronic device <NUM> may be disposed within a designated distance from the second electronic device <NUM>. For example, the second electronic device <NUM> may include a designated interface area for performing wireless charging. According to an embodiment, when the first electronic device <NUM> is disposed within the interface area of the second electronic device <NUM>, the second electronic device <NUM> may detect the first electronic device <NUM>.

According to various embodiments, the second electronic device <NUM> may detect the first electronic device <NUM> by detecting that the first electronic device <NUM> generates a designated resonance. According to an embodiment, the designated resonance may include resonance of <NUM> generated from the first electronic device <NUM>. For example, the second electronic device <NUM> may detect the first electronic device <NUM> by detecting that the first electronic device <NUM> generates a resonance of <NUM>. According to an embodiment, the first electronic device <NUM> may include a resonator <NUM> (not shown) (e.g., the resonator of <FIG>) that generates resonance in a designated band (e.g., <NUM>) in order to generate the designated resonance. According to various embodiments, the first electronic device <NUM> may improve the efficiency of wireless charging by optimizing the arrangement of the resonator <NUM>. The arrangement of the resonator <NUM> included in the first electronic device <NUM> will be described later with reference to <FIG>.

<FIG> is a block diagram illustrating a wireless charging system according to various embodiments.

The wireless charging system <NUM> (e.g., the wireless charging system <NUM> of <FIG>) shown in <FIG> may include at least a part similar to or different from the wireless charging system <NUM> shown in <FIG>. Hereinafter, in conjunction with <FIG>, only the features of the wireless charging system <NUM> that are not described or changed in <FIG> will be described.

According to an embodiment, a reception coil <NUM> of the first electronic device <NUM> may be disposed to at least partially overlap on a transmission coil <NUM> of the second electronic device <NUM>. Alternatively, when the reception coil <NUM> is disposed within a designated distance from the transmission coil <NUM> of the second electronic device <NUM>, the second electronic device <NUM> may wirelessly supply power to the first electronic device <NUM> through the transmission coil <NUM>.

In various embodiments of the disclosure, the first electronic device <NUM> may be the same as or similar to the electronic device <NUM> illustrated in <FIG>. The second electronic device <NUM> may be an external device from the viewpoint of the first electronic device <NUM>, for example, may be the same as or similar to the electronic device <NUM> illustrated in <FIG>.

In various embodiments of the disclosure, the second electronic device <NUM> may be the same as or similar to the electronic device <NUM> illustrated in <FIG>. The first electronic device <NUM> may be an external device from the viewpoint of the second electronic device <NUM>, for example, may be the same as or similar to the electronic device <NUM> illustrated in <FIG>. In various embodiments of the disclosure, the second electronic device <NUM> may be the same as or similar to the first electronic device <NUM>. For example, the first electronic device <NUM> may transmit power to the second electronic device <NUM>.

According to various embodiments, the second electronic device <NUM> (e.g., the electronic device <NUM> of <FIG>) may include a power transmission circuit <NUM>, a control circuit <NUM> (e.g., the processor <NUM> of <FIG>), a communication circuit <NUM> (e.g., the communication module <NUM> of <FIG>), or a sensing circuit <NUM> (e.g., the sensor module <NUM> of <FIG>).

According to various embodiments, the power transmission circuit <NUM> may include a power adapter 311a that receives an input of power supply (power) from the outside and converts the voltage of the received power supply, a power generation circuit 311b that generates power, or a matching circuit 311c for increasing the efficiency between the transmission coil <NUM> and the reception coil <NUM>.

According to various embodiments, the power transmission circuit <NUM> may include a plurality of power adapters 311a, power generation circuits 311b, transmission coils <NUM>, or matching circuits 311c so that it is possible to transmit power to a plurality of power reception devices (e.g., a first power reception device and a second power reception device).

According to various embodiments, the control circuit <NUM> may perform overall control of the second electronic device <NUM>, and may generate various messages required for wireless power transmission to transmit the generated messages to the communication circuit <NUM>. In an embodiment, the control circuit <NUM> may calculate power (or amount of power) to be transmitted to the first electronic device <NUM> based on information received through the communication circuit <NUM>. In an embodiment, the control circuit <NUM> may control the power transmission circuit <NUM> to transmit power generated by the transmission coil <NUM> to the first electronic device <NUM>.

According to various embodiments, the communication circuit <NUM> of the second electronic device <NUM> may include at least one of a first communication circuit 313a or a second communication circuit 313b. The first communication circuit 313a of the second electronic device <NUM> may use a frequency that is the same as or adjacent to, for example, the frequency used by the transmission coil <NUM> for power transmission to communicate with the first communication circuit 323a of the first electronic device <NUM> (e.g., in-band method).

According to various embodiments, the first communication circuit 313a of the second electronic device <NUM> may use the transmission coil <NUM> to communicate with the first communication circuit 323a of the first electronic device <NUM>. Data (or communication signal) generated by the first communication circuit 313a of the second electronic device <NUM> may be transmitted using the transmission coil <NUM>. For example, the first communication circuit 313a of the second electronic device <NUM> may transmit data to the first electronic device <NUM> using a frequency shift keying (FSK) modulation technique. According to various embodiments, the first communication circuit 313a of the second electronic device <NUM> may change the frequency of a power signal transmitted through the transmission coil <NUM> to communicate with the first communication circuit 323a of the first electronic device <NUM>. As another example, the first communication circuit 313a of the second electronic device <NUM> may allow data to be included in the power signal generated by the power generation circuit 311b, thereby communicating with the first communication circuit 323a of the first electronic device <NUM>. For example, the first communication circuit 313a of the second electronic device <NUM> may express data by increasing or decreasing the frequency of the power transmission signal.

The second communication circuit 313b may communicate with the second communication circuit 323b of the first electronic device <NUM> using, for example, a frequency different from the frequency used by the transmission coil <NUM> for power transmission (e.g., out-band method). For example, the second communication circuit 313b may use any one of various short-range communication methods such as Bluetooth, Bluetooth low energy (BLE), Wi-Fi, and/or near field communication (NFC) to acquire information related to the state of charge (e.g., a voltage value after rectifier, a rectified voltage value {e.g., Vrec} information, current information {e.g., load current, Iout} flowing from a rectifying circuit 321b, various packets, and/or message) from the second communication circuit 323b.

According to various embodiments, the sensing circuit <NUM> may include at least one or more sensors, and may sense at least one state of the first electronic device <NUM> using at least one or more sensors.

According to various embodiments, the sensing circuit <NUM> may include at least one of a temperature sensor, a motion sensor, and a current (or voltage) sensor. For example, the control circuit <NUM> may detect a temperature state of the second electronic device <NUM> using the temperature sensor. As another example, the control circuit <NUM> may detect a motion state of the second electronic device <NUM> using the motion sensor. As another example, the control circuit <NUM> may detect a state of an output signal of the second electronic device <NUM>, for example, the magnitude of current, the magnitude of voltage, or the magnitude of power using a current (or voltage) sensor.

According to an embodiment, the current (or voltage) sensor may measure a signal in the power transmission circuit <NUM>. The current (or voltage) sensor may measure a signal in at least a portion of the matching circuit 311c or the power generation circuit 311b. For example, the current (or voltage sensor) may include a circuit for measuring a signal at the front end of the coil <NUM>.

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

According to various embodiments, the first electronic device <NUM> (e.g., the electronic device <NUM> of <FIG>) may include a power receiving circuit <NUM> (e.g., the power management module <NUM> of <FIG>), a processor <NUM> (e.g., the processor <NUM> of <FIG>), a communication circuit <NUM> (e.g., the communication module <NUM> of <FIG>), at least one sensor <NUM> (e.g., the sensor module <NUM> of <FIG>), a display <NUM> (e.g., the display device <NUM> of <FIG>), or a sensing circuit <NUM>. For example, the first electronic device <NUM> may be the same as or similar to the second electronic device <NUM>.

According to various embodiments, the power receiving circuit <NUM> may include a receiving coil <NUM> that wirelessly receives power from the second electronic device <NUM>, an Rx IC <NUM>, a charging circuit (e.g., a PMIC, a charger, a switched capacitor, or voltage divider) 321d, or battery 321e (e.g., the battery <NUM>). In an embodiment, the Rx IC <NUM> may include a matching circuit 321a connected to the receiving coil <NUM>, a rectifying circuit 321b for rectifying received AC power to DC, or an adjusting circuit 321c for adjusting a charging voltage (e.g., LDO).

According to various embodiments, the receiving coil <NUM> may include a first coil <NUM> (e.g., the first coil <NUM> of <FIG>) for wireless charging in a magnetic resonance method, and/or a second coil <NUM> (e.g., the second coil <NUM> of <FIG>) for wireless charging in an electromagnetic induction method.

According to an embodiment, the first coil <NUM> may be designed to be driven in a designated high frequency band. According to an embodiment, the designated high frequency band may include about <NUM>. For example, the first coil <NUM> may be designed to operate at about <NUM> for wireless charging in the magnetic resonance method. According to various embodiments, the designated high frequency band may include at least one of about <NUM>, about <NUM>, about <NUM>, or about <NUM>.

According to an embodiment, the second coil <NUM> may be designed to be driven in a designated low frequency band. According to an embodiment, the designated low frequency band may include about <NUM> to about <NUM> for wireless power consortium (WPC) and <NUM> or less for power matters alliance (PMA). For example, the second coil <NUM> may be designed to operate at about <NUM> to about <NUM> or about <NUM> or less for wireless charging in the electromagnetic induction method.

According to various embodiments, the processor <NUM> may perform overall control of the first electronic device <NUM>, may generate various messages required for wireless power reception, and may transmit the generated messages to the communication circuit <NUM>.

According to various embodiments, the communication circuit <NUM> of the first electronic device <NUM> may include at least one of a first communication circuit 323a and a second communication circuit 323b. The first communication circuit 323a of the first electronic device <NUM> may communicate with the second electronic device <NUM> through the receiving coil <NUM>.

According to various embodiments, the first communication circuit 323a of the first electronic device <NUM> may communicate with the first communication circuit 313a of the second electronic device <NUM> using the receiving coil <NUM>. Data (or communication signal) generated by the first communication circuit 323a of the first electronic device <NUM> may be transmitted using the receiving coil <NUM>. For example, the first communication circuit 323a of the first electronic device <NUM> may transmit data to the second electronic device <NUM> using an amplitude shift keying (ASK) modulation technique. The second communication circuit 323b may communicate with the second electronic device <NUM> using any one of various short-range communication methods such as Bluetooth, BLE, Wi-Fi, and NFC.

In various embodiments of the disclosure, the packet, information, or data transmitted and received by the second electronic device <NUM> and the first electronic device <NUM> may use at least one of the first communication circuit 323a or the second communication circuit 323b of the first electronic device <NUM>.

According to various embodiments, the at least one sensor <NUM> may include at least some of a current/voltage sensor, a temperature sensor, an illuminance sensor, or an acceleration sensor. In an embodiment, the at least one sensor <NUM> may be substantially the same as or a separate component from the sensor module <NUM> of <FIG>.

According to various embodiments, the display <NUM> may display various information related to wireless power transmission/reception.

According to various embodiments, the sensing circuit <NUM> may detect the second electronic device <NUM> by detecting a search signal from the second electronic device <NUM> or received power. The sensing circuit <NUM> may detect a signal change at an input/output terminal of the receiving coil <NUM>, the matching circuit 321a, or the rectifying circuit 321b, due to the signal of the receiving coil <NUM> generated by the signal output from the second electronic device <NUM>. According to various embodiments, the sensing circuit <NUM> may be included in the receiving circuit <NUM>.

<FIG> is a schematic block diagram illustrating the first electronic device <NUM> according to various embodiments of the disclosure.

<FIG> is a circuit diagram illustrating the power receiver of the first electronic device <NUM> according to an embodiment. For example, the circuit diagram shown in <FIG> may include at least a portion of the receiving coil <NUM> and the receiving circuit <NUM> of <FIG>.

<FIG> is a circuit diagram illustrating the power receiver of the first electronic device <NUM> according to a comparative example.

Referring to <FIG> and <FIG>, the first electronic device <NUM> may include a first antenna <NUM>, a second antenna <NUM>, a third antenna <NUM>, and/or a connection unit <NUM>, and they may be electrically connected to a controller <NUM>.

According to an embodiment, the controller <NUM> may include an embodiment in which the controller <NUM> is at least partially similar to or different from the power receiving circuit <NUM> illustrated in <FIG>. For example, the controller <NUM> may include at least some of the Rx IC <NUM> and/or the charging circuit (e.g., a PMIC, a charger, a switched capacitor, or a voltage divider) 321d shown in <FIG>.

According to an embodiment, the first antenna <NUM> may include a first coil <NUM> and/or a first capacitor <NUM> for wireless charging in a magnetic resonance method. According to an embodiment, the first capacitor <NUM> may be connected in parallel to the first coil <NUM>. According to an embodiment, the first capacitor <NUM> may be disposed for impedance matching between the first coil <NUM> and the controller <NUM>. According to an embodiment, the first coil <NUM> may be designed to be driven in a designated high frequency band. According to an embodiment, the designated high frequency band may include <NUM>. For example, the first coil <NUM> may be designed to operate at about <NUM> for wireless charging in the magnetic resonance method.

According to an embodiment, the second antenna <NUM> may be disposed between the first antenna <NUM> and the controller <NUM> and may be connected to the first antenna <NUM> in parallel. According to an embodiment, the second antenna <NUM> may include a second coil <NUM> and/or a second capacitor <NUM> for wireless charging using the electromagnetic induction method. According to an embodiment, the second capacitor <NUM> may be connected in series to the second coil <NUM>. According to an embodiment, the second capacitor <NUM> may be disposed for impedance matching between the second coil <NUM> and the controller <NUM>. According to an embodiment, the second coil <NUM> may be designed to be driven in a designated low frequency band. According to an embodiment, the designated low frequency band may include about <NUM> to about <NUM> for WPC and about <NUM> or less for PMA. For example, the second coil <NUM> may be designed to operate at about <NUM> to about <NUM> or about <NUM> or less for wireless charging in the electromagnetic induction method.

According to an embodiment, the third antenna <NUM> may include a third coil <NUM> for MST communication. According to an embodiment, the third coil <NUM> may be connected to a node <NUM> between the second coil <NUM> and the second capacitor <NUM>, thereby being connected in series with the second coil <NUM>. According to an embodiment, the third coil <NUM> may be driven together with the second coil <NUM> by a switching operation of the connection unit <NUM>. For example, the second antenna <NUM> and the third antenna <NUM> may perform electromagnetic induction wireless charging or MST communication by the switching operation of the connection unit <NUM>.

According to an embodiment, the connection unit <NUM> may include at least one switching element <NUM> connecting the second antenna <NUM> and the third antenna <NUM> to each other. According to an embodiment, the switching element <NUM> may connect the second antenna <NUM> and the third antenna <NUM> to each other based on a control signal for controlling whether MST communication is activated. According to an embodiment, when the second antenna <NUM> and the third antenna <NUM> are connected to each other by the connection unit <NUM>, a current path passing through the second antenna <NUM> and the third antenna <NUM> may be formed from the controller <NUM>.

According to an embodiment, the first electronic device <NUM> may further include a filter unit <NUM> for reducing noise. In <FIG>, the filter unit <NUM> is illustrated as being disposed between the first antenna <NUM> and the second antenna <NUM>, but the position of the filter unit <NUM> may be variously modified or changed. In some embodiments, the first electronic device <NUM> may not include the filter unit <NUM>.

According to an embodiment, the first electronic device <NUM> may further include at least one capacitor <NUM> and <NUM> disposed between the first antenna <NUM> and the controller <NUM>. According to an embodiment, the at least one capacitor <NUM> and <NUM> may include a capacitor <NUM> disposed between one end 413a of the first coil <NUM> and the controller <NUM>, and/or a capacitor <NUM> disposed between the other end 413b of the first coil <NUM> and the controller <NUM>.

According to an embodiment, the first electronic device <NUM> may further include a resonance unit <NUM> that generates a designated resonance. According to an embodiment, the resonance unit <NUM> may be designed to be driven independently of the first antenna <NUM>, the second antenna <NUM>, or the third antenna <NUM> and to generate the designated resonance. According to an embodiment, the resonance unit <NUM> may be designed not to be electrically connected to the first antenna <NUM>, the second antenna <NUM>, or the third antenna <NUM>. According to an embodiment, the resonance unit <NUM> may include a resonance coil <NUM> and a resonance capacitor <NUM> connected to the resonance coil <NUM>, and the resonance coil <NUM> and the resonance coil <NUM> may be designated not to be electrically connected to the first antenna <NUM>, the second antenna <NUM>, or the third antenna <NUM>.

According to an embodiment, the resonance designated by the resonance unit <NUM> may include resonance of about <NUM>. For example, the second electronic device <NUM> may detect the first electronic device <NUM> by detecting that the resonance unit <NUM> of the first electronic device <NUM> generates resonance of about <NUM>. According to various embodiments, the first electronic device <NUM> may improve the efficiency of wireless charging by optimizing the arrangement of the resonance unit <NUM>. The arrangement of the resonance unit <NUM> included in the first electronic device <NUM> will be described later with reference to <FIG>.

Referring to <FIG>, the resonance unit <NUM> illustrated in <FIG> is omitted, and the power receiver of the first electronic device <NUM> according to the comparative example may include a resonance capacitor <NUM> that is disposed between the second coil <NUM> and the control unit <NUM> and is connected in parallel with the second coil <NUM>. The resonance capacitor <NUM> according to the comparative example may perform the function and role of the resonance unit <NUM> illustrated in <FIG>. For example, the resonance capacitor <NUM> according to the comparative example may be designed to generate a resonance of about <NUM>.

Compared to the comparative example illustrated in <FIG>, the first electronic device <NUM> according to various embodiments may improve the efficiency of wireless charging or may reduce a loss of a power signal. For example, in the circuit of the power receiver according to the comparative example shown in <FIG>, the resonance capacitor <NUM> may be disposed in a path through which the power signal received through the first antenna <NUM> is transmitted to the controller <NUM>, whereby a loss may occur. For example, the resonance capacitor <NUM> may lower the impedance when the first coil <NUM> operates in a band of about <NUM>. Accordingly, the loss of the power signal may be reduced by about <NUM>%. Unlike the comparative example shown in <FIG>, in the first electronic device <NUM> according to various embodiments, the resonance capacitor <NUM> connected in parallel with the second coil <NUM> is omitted, and the above-mentioned loss can be reduced by disposing the resonance unit <NUM> generating resonance of about <NUM> not to be electrically connected to the first antenna <NUM>, the second antenna <NUM>, or the third antenna <NUM>.

<FIG> is a perspective view illustrating a rear surface of the first electronic device <NUM> according to various embodiments of the disclosure. For example, <FIG> illustrates a state in which a cover <NUM> located on the rear surface of the first electronic device <NUM> is detached.

The first electronic device <NUM> illustrated in <FIG> may include an embodiment in which the first electronic device <NUM> is at least partially similar to or different from the first electronic device <NUM> illustrated in <FIG>. Hereinafter, in conjunction with <FIG>, only the features of the first electronic device <NUM> that are not described or changed in <FIG> will be described.

Referring to <FIG>, a first electronic device <NUM> (e.g., the electronic device <NUM> of <FIG>) according to an embodiment may include a housing <NUM> for accommodating and fixing components. According to an embodiment, a circuit board <NUM> on which one or more coils <NUM> (e.g., the first coil <NUM>, the second coil <NUM>, and/or the third coil <NUM> of <FIG>) are disposed, a camera <NUM> (e.g., the camera module <NUM> of <FIG>), and/or a battery <NUM> (e.g., the battery <NUM> of <FIG>) may be disposed in the housing <NUM>.

According to an embodiment, the circuit board <NUM> on which the coil <NUM> is disposed may be positioned at the center of the first electronic device <NUM> when the first electronic device <NUM> with the cover <NUM> removed is viewed from the rear. According to an embodiment, the circuit board <NUM> on which the coil <NUM> is disposed may be disposed at the center of the first electronic device <NUM> when the first electronic device <NUM> with the cover <NUM> removed is viewed from the rear, and a portion of the circuit board <NUM> may be disposed to extend in a third direction (e.g., Y direction of <FIG>) from the center of the circuit board <NUM>. According to an embodiment, a portion of the circuit board <NUM> may extend in the third direction (e.g., Y direction of <FIG>) from the center of the first electronic device <NUM>, and the portion extending in the third direction (e.g., the Y direction of <FIG>) of the circuit board <NUM> may be disposed adjacent to the camera <NUM>. According to an embodiment, in the portion extending in the third direction (e.g., Y direction of <FIG>) of the circuit board <NUM>, at least a portion of the coil <NUM> may be disposed.

According to an embodiment, the circuit board <NUM> may be implemented in the form of a printed circuit board (PCB), a flexible PCB (FPCB), or a rigid-flex PCB (RFPCB).

<FIG> is a schematic cross-sectional view illustrating the first electronic device <NUM> according to various embodiments of the disclosure.

A first electronic device <NUM> illustrated in <FIG> may include an embodiment in which the first electronic device <NUM> is at least partially similar to or different from the first electronic devices <NUM> and <NUM> illustrated in <FIG> and <FIG>. Hereinafter, in conjunction with <FIG>, only the features of the first electronic device <NUM> that are not described or changed in <FIG> and <FIG> will be described.

Referring to <FIG>, a first electronic device <NUM> (e.g., the electronic device <NUM> of <FIG>) according to an embodiment may include a housing <NUM> (e.g., the housing <NUM> of <FIG>) for accommodating and fixing one or more components and/or a cover <NUM> (e.g., the cover <NUM> of <FIG>) coupled to the housing <NUM> on the rear surface of the first electronic device <NUM>. The Components may include, for example, a display panel <NUM>, a first board <NUM>, a battery <NUM>, a camera <NUM>, or a circuit board <NUM> (e.g., the circuit board <NUM>) which are positioned inside the housing <NUM>.

The display panel <NUM> may be attached to, for example, a glass sheet (window cover) <NUM> positioned on the front surface of the first electronic device <NUM>. According to an embodiment, the display panel <NUM> may be integrally provided with a touch sensor or a pressure sensor. According to another embodiment, the touch sensor or the pressure sensor may be separated from the display panel.

On the first substrate <NUM>, for example, a communication module (e.g., the communication module <NUM> of <FIG>) or a processor (e.g., the processor <NUM> of <FIG>) may be disposed. According to an embodiment, the first substrate <NUM> may be implemented using at least one of a printed circuit board (PCB) or a flexible printed circuit board (FPCB). According to an embodiment, the first substrate <NUM> may provide a ground for grounding a loop antenna <NUM> (e.g., the first coil <NUM>, the second <NUM>, and the third coil <NUM> of <FIG>) disposed on the FPCB <NUM>.

The cover <NUM> may include, for example, a conductive area made of a conductive material or a non-conductive area made of a non-conductive material. For example, the cover <NUM> may be divided into a conductive area and a non-conductive area positioned on one or both sides of the conductive area. According to an embodiment, at least one opening <NUM> for exposing some components of the first electronic device <NUM> to the outside may be provided on the cover <NUM>. For example, the cover <NUM> may include an opening <NUM> for exposing a camera <NUM>, a flash, or a sensor (e.g., a fingerprint sensor).

According to an embodiment, the FPCB <NUM> may include one or more loop antennas <NUM>, and may be positioned to be electrically insulated from the conductive area of the cover <NUM>.

According to an embodiment, the one or more loop antennas <NUM> may be provided to be the same type. For example, the one or more loop antennas <NUM> may be provided as a planar type of coil. According to another embodiment, some of the one or more loop antennas <NUM> may be provided as a planar type of coil, and the others thereof may be provided as a solenoid type of coil.

According to various embodiments, some of the one or more loop antennas <NUM> may be configured to generate a magnetic field in a direction (Z-axis direction) perpendicular to the rear surface (XY plane) of the first electronic device <NUM>, and the others thereof may be configured to generate a magnetic field in a horizontal direction on the rear surface (XY plane) of the first electronic device <NUM>.

An electronic device (e.g., the first electronic device <NUM> of <FIG>) according to various embodiments of the disclosure may include a battery (e.g., the battery 321e of <FIG>), a charging circuit (e.g., the charging circuit 321d of <FIG>), and a circuit board (e.g., the circuit board <NUM> of <FIG>) configured to be electrically connected to the charging circuit 321d and include a first portion (e.g., a first portion <NUM> of <FIG>) and a second portion (e.g., the second portion <NUM> of <FIG>) disposed adjacent to the first portion <NUM>, wherein a first coil (e.g., the first coil <NUM> of <FIG>), a second coil (e.g., the second coil <NUM> of <FIG>), and a resonance coil (e.g., the resonance coil <NUM> of <FIG>) may be disposed in the first portion <NUM> of the circuit board <NUM>, the first coil <NUM> being disposed outside the second coil <NUM>, and the resonance coil <NUM> being disposed inside the second coil <NUM>, and wherein a third coil (e.g., the third coil <NUM> of <FIG>) and a resonance capacitor (e.g., the resonance capacitor <NUM> of <FIG>) may be disposed in the second portion <NUM> of the circuit board <NUM>, the resonance capacitor <NUM> being disposed inside the third coil <NUM> and the resonance coil <NUM> and the resonance capacitor <NUM> being electrically connected to each other to generate a designated resonance.

According to an embodiment, the first coil <NUM> may be a first antenna for wireless charging in a magnetic resonance method, and the second coil <NUM> may be a second antenna for wireless charging in an electromagnetic induction method.

According to an embodiment, a distance between innermost patterns of the resonance coil <NUM> and the second coil <NUM> may be greater than <NUM> and less than <NUM>.

According to an embodiment, the designated resonance may include resonance of <NUM>.

According to an embodiment, the resonance coil <NUM> may be disposed adjacent to the center of the second coil <NUM>.

According to an embodiment, the first coil <NUM> may operate in a designated high frequency band for wireless charging in the magnetic resonance method, and the second coil <NUM> may operate in a designated low frequency band for wireless charging in the electromagnetic induction method.

According to an embodiment, the circuit board <NUM> may further include a fourth coil <NUM> configured to be disposed outside the third coil <NUM> and operate as an antenna for NFC communication, wherein the third coil <NUM> is a third antenna for MST communication and a distance between innermost patterns of the third coil <NUM> and the fourth coil <NUM> may be greater than or equal to <NUM>.

According to an embodiment, a distance between innermost patterns of the second coil <NUM> and the first coil <NUM> may be greater than or equal to <NUM>.

According to an embodiment, the resonance coil <NUM> and the resonance capacitor <NUM> are electrically connected to the first coil <NUM> to the third coil <NUM>.

According to an embodiment, the circuit board <NUM> may further include at least one line that is disposed to extend from the first portion <NUM> to the second portion <NUM> and connect the resonance coil <NUM> and the resonance capacitor <NUM>.

The circuit board <NUM> on which a coil for wireless charging of the electronic device <NUM> is disposed according to various embodiments of the disclosure may include the first portion <NUM> and the second portion <NUM> disposed adjacent to the first portion <NUM>, wherein the first coil <NUM>, the second coil <NUM>, and the resonance coil <NUM> may be disposed in the first portion <NUM>, the first coil <NUM> being disposed outside the second coil <NUM> and the resonance coil <NUM> being disposed inside the second coil <NUM>, and wherein the third coil <NUM> and the resonance capacitor <NUM> may be disposed in the second portion <NUM>, the resonance capacitor <NUM> being disposed inside the third coil <NUM> and the resonance coil <NUM> and the resonance capacitor <NUM> being electrically connected to each other to generate the designated resonance.

According to an embodiment, the first coil <NUM> may be a first antenna for wireless charging using a magnetic resonance method, and the second coil <NUM> may be a second antenna for wireless charging using an electromagnetic induction method.

According to an embodiment, the designated resonance may include a resonance of <NUM>.

According to an embodiment, the first coil <NUM> may operate in a designated high frequency band for wireless charging using the magnetic resonance method, and the second coil <NUM> may operate in a designated low frequency band for wireless charging using the electromagnetic induction method.

According to an embodiment, the resonance coil <NUM> and the resonance capacitor <NUM> may not be electrically connected to the first coil <NUM> to the third coil <NUM>.

<FIG> is a plan view illustrating a portion of a circuit board on which a coil is formed according to various embodiments of the disclosure.

The circuit board <NUM> illustrated in <FIG> may include an embodiment in which the circuit board <NUM> is at least partially similar to or different from the circuit board <NUM> illustrated in <FIG> and/or the FPCB <NUM> illustrated in <FIG>. Hereinafter, in conjunction with <FIG>, features of the circuit board <NUM> that are not described or changed in <FIG> and <FIG> will be mainly described.

Referring to <FIG>, the circuit board <NUM> of the first electronic device <NUM> according to an embodiment may be electrically connected to a board (not shown) (e.g., the first board <NUM> of <FIG>) in a connector method.

According to an embodiment, the circuit board <NUM> may be implemented in the form of a printed circuit board (PCB), a flexible PCB (FPCB), or a rigid-flexible PCB (RFPCB).

According to an embodiment, the circuit board <NUM> may include a plurality of coils <NUM>, <NUM>, <NUM>, and <NUM> electrically connected to a substrate (e.g., the first substrate <NUM> of <FIG>) through a connector. According to an embodiment, the plurality of coils <NUM>, <NUM>, <NUM>, and <NUM> may be electrically connected to a charging circuit (e.g., the Rx IC <NUM> and/or the charging circuit 321d of <FIG>) or a communication module (e.g., the communication module <NUM> of <FIG>) to operate as an antenna for short-range communication. According to an embodiment, the plurality of coils <NUM>, <NUM>, <NUM>, and <NUM> may operate as an antenna for wireless charging, an antenna for MST communication, and/or an antenna for NFC communication as the short-range communication.

According to an embodiment, the circuit board <NUM> may further include a resonance coil <NUM> and/or a capacitor <NUM> that is not electrically connected to a connector and generates resonance of a designated band.

According to an embodiment, the circuit board <NUM> may include the first portion <NUM> and/or the second portion <NUM>. According to an embodiment, the first portion <NUM> and the second portion <NUM> may be disposed adjacent to each other. For example, in the circuit board <NUM>, the boundary of the first portion <NUM> and the boundary of the second portion <NUM> may be disposed adjacent to each other. According to an embodiment, a connector electrically connected to the board may be disposed on the second portion <NUM> of the circuit board <NUM>. According to an embodiment, the second portion <NUM> of the circuit board <NUM> may be disposed adjacent to a camera (not shown) of the second electronic device <NUM> (e.g., the camera <NUM> of <FIG>).

According to an embodiment, in the first portion <NUM> of the circuit board <NUM>, a second coil <NUM> (e.g., the second coil <NUM> of <FIG>) for wireless charging using an electromagnetic induction method may be disposed. For example, the second coil <NUM> may be designed to operate at about <NUM> to about <NUM> or about <NUM> or less for wireless charging using the electromagnetic induction method.

According to an embodiment, a first coil <NUM> (e.g., the first coil <NUM> of <FIG>) for wireless charging using a magnetic resonance method may be disposed outside the second coil <NUM>. For example, the first coil <NUM> may be designed to operate at about <NUM> for wireless charging using the magnetic resonance method.

According to an embodiment, in the inner side <NUM> of the second coil <NUM>, a resonance coil <NUM> (e.g., the resonance coil <NUM> of <FIG>) for generating resonance designated for an external device (e.g., the second electronic device <NUM> of <FIG>) to detect the first electronic device <NUM>. According to an embodiment, the resonance coil <NUM> may be connected to a resonance capacitor <NUM> (e.g., the resonance capacitor <NUM> of <FIG>) disposed in the second portion <NUM> of the circuit board <NUM>, so that the resonance coil <NUM> may be designated to generate a resonance of <NUM>. According to an embodiment, the resonance coil <NUM> may be disposed adjacent to a center <NUM> of the second coil <NUM>.

According to an embodiment, a distance d3 between innermost patterns of the resonance coil <NUM> and the second coil <NUM> may be designed to be greater than about <NUM> and less than about <NUM>. Accordingly, it is possible to reduce a loss of a power signal due to coupling between the resonance coil <NUM> and the second coil <NUM>. For example, since the resonance coil <NUM> operates at about <NUM> and the second coil <NUM> operates at about <NUM>, the loss of the power signal due to coupling at the separation distance may be negligible.

According to an embodiment, the circuit board <NUM> may include at least one line <NUM> that is disposed to extend from the first portion <NUM> to the second portion <NUM> and connects the resonance coil <NUM> and the resonance capacitor <NUM>.

According to an embodiment, a distance d2 between innermost patterns of the second coil <NUM> and the first coil <NUM> may be designed to be greater than or equal to about <NUM>. Accordingly, it is possible to reduce a loss of a power signal due to coupling between the first coil <NUM> and the second coil <NUM>.

According to an embodiment, a connector electrically connected to the board may be disposed on the second portion <NUM> of the circuit board <NUM>. According to an embodiment, the second portion <NUM> of the circuit board <NUM> may be disposed adjacent to a camera (not shown) of the first electronic device <NUM> (e.g., the camera <NUM> of <FIG>).

According to an embodiment, the third coil <NUM> for MST communication may be disposed on the second portion <NUM> of the circuit board <NUM>. According to an embodiment, a connection between the third coil <NUM> and the second coil <NUM> may be controlled by a switching operation of a connection unit (not shown) (e.g., the connection unit <NUM> of <FIG>), and may perform wireless charging in an electromagnetic induction method or perform MST communication.

According to an embodiment, the fourth coil <NUM> for NFC communication may be disposed outside the third coil <NUM>.

According to an embodiment, the resonance capacitor <NUM> may be disposed on the inner side <NUM> of the third coil <NUM>. According to an embodiment, the resonance capacitor <NUM> may be electrically connected to the resonance coil <NUM> to generate a resonance in a designated band.

According to an embodiment, the distance d1 between the innermost patterns of the third coil <NUM> and the fourth coil <NUM> may be designed to be greater than or equal to about <NUM>. Accordingly, it is possible to reduce a loss of a power signal due to coupling between the third coil <NUM> and the fourth coil <NUM>.

Claim 1:
An electronic device (<NUM>, <NUM>) comprising:
a battery (<NUM>, 321e);
a charging circuit (321d) configured to charge the battery (<NUM>, 321e) using charging power; and
a circuit board (<NUM>, <NUM>) configured to be electrically connected to the charging circuit (321d) for providing the charging power, the circuit board (<NUM>, <NUM>) including a first portion (<NUM>) and a second portion (<NUM>) disposed adjacent to the first portion (<NUM>),
wherein a first coil (<NUM>), a second coil (<NUM>), and a resonance coil (<NUM>) are disposed in the first portion (<NUM>) of the circuit board (<NUM>, <NUM>), the first coil (<NUM>) being disposed outside the second coil (<NUM>), and the resonance coil (<NUM>) being disposed inside the second coil (<NUM>),
wherein a third coil (<NUM>) and a resonance capacitor (<NUM>) are disposed in the second portion (<NUM>) of the circuit board (<NUM>, <NUM>), the resonance capacitor (<NUM>) being disposed inside the third coil (<NUM>), and the resonance coil (<NUM>) and the resonance capacitor (<NUM>) being electrically connected to each other to generate a designated resonance such that an external electronic device transmitting wireless power to the electronic device (<NUM>, <NUM>) detects the generated resonance, and
wherein the resonance coil (<NUM>) and the resonance capacitor (<NUM>) are not electrically connected to any of the first coil (<NUM>), second coil (<NUM>) and third coil (<NUM>).