KR102036637B1 - A receiving coil of wireless power receiver including a coil unit for NFC and a coil unit for wireless power charging - Google Patents

Abstract

The present specification provides a reception coil of a wireless power receiver including a coil part for NFC and a coil part for wireless charging.
To this end, the receiving coil of the wireless power receiver according to an embodiment, the inner diameter is Di, the outer diameter is wound around the wireless coil coil for winding and the outer coil of the wireless charging coil wound in a circular winding Including an antenna coil unit, wherein the wireless charging coil unit and the antenna coil may be formed on a flexible substrate.

Description

A receiving coil of wireless power receiver including a coil unit for NFC and a coil unit for wireless power charging}

This disclosure relates to wireless power transfer. More specifically, the present invention relates to a reception coil of a wireless power receiver including a coil unit for NFC and a wireless charging coil unit.

Traditionally, instead of supplying electrical energy by wire to wireless power receivers, a method of supplying electrical energy wirelessly without contact is recently used. The wireless power receiver for receiving energy wirelessly may be directly driven by the received wireless power, or may be driven by the charged power by charging a battery using the received wireless power.

The Wireless Power Consortium, which discusses the technology of magnetic induction wireless power transfer, stated on April 12, 2010, the "Wireless Power Transfer System Manual, Volume 1, on Interoperability in Wireless Power Transfer. Low Power, Part 1: Interface Definition, Version 1.00 RC1 (System Description Wireless Power Transfer, Volume 1, Low Power, Part 1: Interface Definition, Version 1.00 Release Candidate 1) "standard document. The standard document of the wireless power consultant describes a method of transferring power from one wireless power transmitter to one wireless power receiver by a magnetic induction method.

The contactless wireless charging method is a breakthrough energy transfer concept that can remove power and transfer energy electromagnetically in the way of transmitting power through a conventional wire and using it as a power source of an electronic device. Magnetic induction contactless wireless charging is a method of generating a magnetic field through the coil in the power transmission unit to obtain a power while sharing the magnetic field by placing the coil in close proximity to the device. It has already been put into practical use in devices such as electric toothbrushes and charging covers for smartphones.

Recently, various wireless charging devices have been developed for portable devices that require frequent charging due to high power usage such as smartphones and tablet PCs. However, due to the size and thickness of the wireless charging receiver coil itself, there are many demands of product developers and consumers who want to continuously reduce the size and thickness of the wireless power receiver in order to apply to portable devices in which portability is essential.

An object of the present specification is to provide a reception coil of a wireless power receiver having a coil unit for NFC and a wireless charging coil unit.

Receiving coil of a wireless power receiver according to an embodiment of the present disclosure for achieving the above objects, the inner diameter is Di, the outer diameter is a wireless charging coil unit wound in a circular coil and the wireless charging nose An antenna coil part wound around a portion of the outer circumference may be included, and the wireless charging coil part and the antenna coil may be formed on a flexible substrate.

As an example related to the present specification, the flexible substrate may be a flexible printed circuit board (FPCB).

As an example related to the present specification, the flexible substrate may be a film or thin printed circuit board.

As an example related to the present specification, the coil unit for an antenna may include at least one antenna of a near field communication (NFC) antenna, a radio frequency identification (RFID) antenna, a frequency modulation (FM) antenna, and a digital multimedia broadcasting (DMB) antenna. It may be for performing a function.

As an example related to the present specification, the inner diameter Di may be 18 mm to 22 mm, and the outer diameter Do may be 36.36 mm to 44.44 mm.

As an example related to the present specification, the wireless charging coil part may have a thickness of 0.18 mm to 0.22 mm.

As an example related to the present specification, the number of turns of the coil part for wireless charging may be 8 to 12.

As an example related to the present specification, the wireless charging coil unit may include a first circular winding coil formed on an upper surface of the flexible substrate and a second circular winding coil formed on a lower surface of the flexible substrate.

As an example related to the present specification, the antenna coil part may be formed on a lower surface of the flexible substrate.

As an example related to the present specification, the wireless charging coil unit may include a lower wire layer; An intermediate insulating layer formed on the bottom wire layer; And it may include a top wire layer formed on the intermediate insulating layer.

As an example related to the present specification, the lower wire layer or the upper wire layer may be formed of copper.

As an example related to the present specification, the intermediate insulating layer may be formed of a polyimide film.

As an example related to the present specification, the antenna coil part may be wound along an outer circumference of the flexible substrate.

As an example related to the present specification, the antenna coil part may have a long length of Dil and a short side of which is wound in a rectangular shape of Diw.

As an example associated with the present specification, the Dil may be 47.52 mm to 58.08 mm, and the Diw may be 41.94 mm to 51.26 mm.

According to one embodiment disclosed herein, by using a flexible printed circuit board technology to propose a thin-film wireless charging receiver coil with a built-in NFC antenna, there is an advantage that can significantly reduce the size and thickness of the existing wireless charging receiver coil There may be.

1 is an exemplary view conceptually illustrating a wireless power transmitter and an electronic device according to embodiments of the present disclosure.
2 (a) and 2 (b) are block diagrams illustrating the configurations of the wireless power transmitter 100 and the electronic device 200 employable in the embodiments disclosed herein, respectively.
3 illustrates a concept of wirelessly transferring power from a wireless power transmitter to an electronic device according to an inductive coupling method.
4 is a block diagram exemplarily illustrating a part of a configuration of an electromagnetic induction wireless power transmitter 100 and an electronic device 200 that may be employed in the embodiments disclosed herein.
FIG. 5 is a block diagram of a wireless power transmitter configured to have one or more transmitting coils receiving power according to an inductive coupling scheme that may be employed in the embodiments disclosed herein.
6 illustrates a concept in which power is wirelessly transmitted from a wireless power transmitter to an electronic device according to a resonance coupling method.
FIG. 7 is a block diagram exemplarily illustrating a part of a configuration of a wireless power transmitter 100 and an electronic device 200 of a resonance type that may be employed in the embodiments disclosed herein.
FIG. 8 is a block diagram of a wireless power transmitter configured to have one or more transmitting coils receiving power in accordance with a resonant coupling scheme employable in embodiments disclosed herein.
FIG. 9 is a block diagram illustrating a wireless power transmitter further including an additional configuration in addition to the configuration illustrated in FIG. 2A.
10 illustrates a configuration when the electronic device 200 according to the embodiments disclosed herein is implemented in the form of a mobile terminal.
FIG. 11 illustrates a concept of transmitting and receiving a packet between a wireless power transmitter and an electronic device through modulation and demodulation of a wireless power signal in wireless power transmission disclosed herein.
12 illustrates a method of displaying data bits and bytes in which the wireless power transmitter 100 configures a power control message.
FIG. 13 illustrates a packet including a power control message used in a wireless power delivery method according to embodiments disclosed herein.
FIG. 14 illustrates operation states of the wireless power transmitter 100 and the electronic device 200 according to the embodiments disclosed herein.
15 to 19 illustrate a structure of packets including a power control message between the wireless power transmitter 100 and the electronic device 200.
20 is an exemplary view showing a receiving coil of a wireless power receiver according to an embodiment disclosed in the present specification.
21 is an exemplary view showing a configuration of a cross section of a receiving coil according to an embodiment disclosed in the present specification.
22 is a diagram showing the size, thickness and number of turns of the wireless charging receiver coil of the wireless charging receiver coil with a built-in thin film NFC coil.
Fig. 23 is a chart showing characteristic values of the receiving coil unit for wireless charging of the receiving coil for wireless charging with a built-in NFC coil.
24 is a chart showing the size and the number of turns of the NFC coil portion of the thin-film NFC coil-embedded wireless charging receiving coil.
25 is a chart showing the characteristic value of the NFC coil portion of the thin-film NFC coil-embedded wireless charging receiver coil.

The technology disclosed herein applies to wireless power transfer. However, the technology disclosed herein is not limited thereto, and may be applied to all power transmission systems and methods, wireless charging circuits and methods, and other methods and devices using wirelessly transmitted power to which the technical spirit of the technology may be applied. .

It is to be noted that the technical terms used herein are merely used to describe particular embodiments and are not intended to limit the spirit of the technology disclosed herein. In addition, the technical terms used herein should be construed as meanings generally understood by those skilled in the art to which the technology disclosed herein belongs, unless defined otherwise in this specification. It should not be interpreted in a comprehensive sense, or in an overly reduced sense. In addition, when the technical terms used herein are incorrect technical terms that do not accurately express the spirit of the technology disclosed herein, it should be replaced with technical terms that can be understood correctly by those skilled in the art. In addition, the general terms used herein should be interpreted as defined in the dictionary, or according to the context before and after, and should not be interpreted in an excessively reduced sense.

Also, the singular forms used herein include the plural forms unless the context clearly indicates otherwise. In this specification, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or some steps It should be construed that it may not be included or may further include additional components or steps.

In addition, the suffixes "module" and "unit" for the components used herein are given or mixed in consideration of ease of specification, and do not have meanings or roles that are distinguished from each other.

In addition, terms including ordinal numbers, such as first and second, as used herein may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments disclosed herein will be described in detail with reference to the accompanying drawings, and the same or similar components will be given the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted.

In addition, in describing the technology disclosed herein, if it is determined that the detailed description of the related known technology may obscure the gist of the technology disclosed herein, the detailed description thereof will be omitted. In addition, it is to be noted that the accompanying drawings are only for easily understanding the spirit of the technology disclosed in this specification, and the spirit of the technology should not be construed as being limited by the accompanying drawings.

1-conceptual diagram of a wireless power transmitter and an electronic device

1 is an exemplary view conceptually illustrating a wireless power transmitter and an electronic device according to embodiments of the present disclosure.

As can be seen with reference to FIG. 1, the wireless power transmitter 100 may be a power transmission device for wirelessly transmitting power required for the electronic device 200.

In addition, the wireless power transmitter 100 may be a wireless charging device that charges a battery of the electronic device 200 by transferring power wirelessly. An embodiment implemented with the wireless power transmitter 100 will be described later with reference to FIG. 9.

In addition, the wireless power transmitter 100 may be implemented as various types of devices that deliver power to the electronic device 200 requiring power in a non-contact state.

The electronic device 200 is a device capable of operating by wirelessly receiving power from the wireless power transmitter 100. In addition, the electronic device 200 may charge the battery using the received wireless power.

On the other hand, the electronic device for wirelessly receiving power described herein includes all portable electronic devices, such as input / output devices such as a keyboard, a mouse, an auxiliary output device for video or audio, and a mobile phone, a cellular phone, a smart phone ( Smart phone (PDA), Personal Digital Assistants (PDA), Portable Multimedia Player (PMP), tablets, or multimedia devices should be interpreted in a comprehensive sense.

As described below, the electronic device 200 may be a mobile communication terminal (eg, a mobile phone, a cellular phone, a tablet) or a multimedia device. An embodiment in which the electronic device 200 is implemented as a mobile terminal will be described below with reference to FIG. 10.

The wireless power transmitter 100 may use one or more wireless power transfer methods to wirelessly transfer power to the electronic device 200 without contact with each other. That is, the wireless power transmitter 100 has an inductive coupling based on an electromagnetic induction generated by the wireless power signal and a resonance coupling based on an electromagnetic resonance generated by a wireless power signal having a specific frequency. Power can be delivered using one or more of Electromagnetic Resonance Coupling.

The wireless power transmission by the inductive coupling method is a technology for wirelessly transmitting power using a primary coil and a secondary coil, and a current is transmitted to the other coil side by a changing magnetic field generated by an electromagnetic induction phenomenon in one coil. It is said that power is delivered by being derived.

In the wireless power transmission by the resonance coupling method, electromagnetic resonance occurs in the electronic device 200 by a wireless power signal transmitted from the wireless power transmitter 100, and the wireless power transmission is performed by the resonance phenomenon. The power is transmitted from the device 100 to the electronic device 200.

Hereinafter, embodiments of the wireless power transmitter 100 and the electronic device 200 disclosed herein will be described in detail. The reference numerals added to the components of each of the following drawings are the same as long as the same reference numerals are used as long as they are shown in different drawings.

2 is a block diagram illustrating the configuration of a wireless power transmitter 100 and an electronic device 200 that may be employed in the embodiments disclosed herein.

2A-Wireless Power Transmitter

Referring to FIG. 2A, the wireless power transmitter 100 is configured to include a power transmission unit 110. The power transmission unit 110 may include a power conversion unit 111 and a power transmission control unit 112.

The power converter 111 converts the power supplied from the transmission power supply 190 into a wireless power signal and transmits the converted power to the electronic device 200. The wireless power signal transmitted by the power converter 111 is formed in the form of a magnetic field or an electromagnetic field having an oscillation characteristic. To this end, the power converter 111 may be configured to include a coil for generating the wireless power signal.

The power converter 111 may include a component for forming a wireless power signal of a different type according to each power transmission scheme.

In some embodiments, the power converter 111 may be configured to include a primary coil for forming a magnetic field that changes in order to induce a current in the secondary coil of the electronic device 200 according to an inductive coupling method. . In addition, in some embodiments, the power converter 111 is configured to include a coil (or antenna) for forming a magnetic field having a specific resonance frequency in order to generate a resonance phenomenon in the electronic device 200 according to the resonance coupling method. Can be.

In addition, in some embodiments, the power converter 111 may transfer power using one or more of the above-described inductive coupling method and resonance coupling method.

For those following the inductive coupling method among the components included in the power converter 111, with reference to FIGS. 4A, 4B and 5, for those following the resonance coupling method, FIGS. 7A, 7B and 8. It will be described later with reference to.

On the other hand, the power converter 111 may be configured to further include a circuit that can adjust the characteristics such as the frequency, applied voltage, current used to form the wireless power signal.

The power transmission control unit 112 controls each component included in the power transmission unit 110. In some embodiments, the power transmission control unit 112 may be implemented to be integrated with another control unit (not shown) that controls the wireless power supply device 100.

On the other hand, the wireless power signal can reach the area can be divided into two. First, an active area refers to an area through which a wireless power signal for transmitting power to the electronic device 200 passes. Next, a semi-active area refers to a region of interest in which the wireless power transmitter 100 may detect the presence of the electronic device 200. Here, the power transmission control unit 112 may detect whether the electronic device 200 is placed or removed in the activity area or the detection area. In detail, the power transmission control unit 112 uses the wireless power signal formed by the power conversion unit 111 or whether the electronic device 200 is disposed in the active area or the detection area by a sensor provided separately. It can be detected. For example, the power transmission control unit 112 is influenced by the wireless power signal due to the electronic device 200 present in the sensing area, the power for forming the wireless power signal of the power converter 111. The presence of the electronic device 200 can be detected by monitoring whether or not the characteristics of the electronic device 200 change. However, the active area and the sensing area may vary according to a wireless power transmission method such as an inductive coupling method and a resonance coupling method.

The power transmission control unit 112 may perform a process of identifying the electronic device 200 or determine whether to start wireless power transmission according to a result of detecting the presence of the electronic device 200.

In addition, the power transmission control unit 112 may determine one or more characteristics of the frequency, voltage, and current of the power conversion unit 111 for forming the wireless power signal. The determination of the characteristic may be made by the condition of the wireless power transmitter 100 side or by the condition of the electronic device 200 side. In some embodiments, the power transmission control unit 112 may determine the characteristic based on the device identification information of the electronic device 200. In some embodiments, the power transmission control unit 112 may determine the characteristic based on the required power information of the electronic device 200 or profile information on the required power. The power transmission control unit 112 may receive a power control message from the electronic device 200. The power transmission control unit 112 may determine one or more characteristics of the frequency, voltage, and current of the power conversion unit 111 based on the received power control message, and other control based on the power control message. You can perform the operation.

For example, the power transmission control unit 112 may be used to form the wireless power signal according to a power control message including at least one of rectified power amount information, charge state information, and identification information of the electronic device 200. One or more of the following characteristics can be determined: frequency, current, voltage.

In addition, as another control operation using the power control message, the wireless power transmitter 100 may perform a general control operation related to wireless power transfer based on the power control message. For example, the wireless power transmitter 100 may receive information to be output acoustically or visually related to the electronic device 200 through the power control message, or may receive information necessary for authentication between devices. .

In some embodiments, the power transmission control unit 112 may receive the power control message through the wireless power signal. In some embodiments, the power transmission control unit 112 may receive the power control message through a method of receiving user data.

In order to receive the power control message, the wireless power transmitter 100 may further include a power demodulation / demodulation unit 113 electrically connected to the power converter 111. . The demodulation unit 113 may be used to demodulate the wireless power signal modulated by the electronic device 200 to receive the power control message. A method for the power converter 111 to receive a power control message using a wireless power signal will be described below with reference to FIGS. 11A to 13.

In addition, the power transmission control unit 112 may obtain a power control message by receiving user data including a power control message by a communication means (not shown) included in the wireless power transmitter 100. have.

According to one embodiment disclosed herein, the wireless power transmitter 100 may supply power to a plurality of electronic devices. In this case, wireless power signals modulated by the plurality of electronic devices may collide. Accordingly, components included in the wireless power transmitter 100 may perform various operations to avoid collision of the modulated wireless power signals.

According to an embodiment of the present disclosure, the power converter 111 may convert the power supplied from the transmission power supply 190 into a wireless power signal and transmit the wireless power signal to a plurality of electronic devices. . For example, the plurality of electronic devices may be two electronic devices, a first electronic device and a second electronic device.

In addition, the power converter 111 may form a wireless power signal for power transmission and receive a first response signal and a second response signal corresponding to the wireless power signal.

The power transmission control unit 112 determines whether the first response signal and the second response signal collide with each other, and when the first response signal and the second response signal collide based on the determination result, the power transmission. Can be reset.

The first response signal and the second response signal may be generated by modulating the wireless power signal by a first device and a second device, respectively.

In addition, the power transmission control unit 112 may control the power conversion unit 111 to sequentially receive the first response signal and the second response signal formed so as not to collide with each other as a result of resetting the power transmission.

The sequentially receiving may include receiving the first response signal after a first time interval within a predetermined response period and receiving the second response signal after a second time interval, wherein the first time interval and The second time interval may be determined based on a value generated by generating a random number.

The predetermined response interval (Tping interval) may be determined to be longer than the time that can include both the first response signal and the second response signal, and may be determined after resetting the power transmission.

According to an embodiment, the determination of whether a collision occurs may be performed according to whether the first response signal and the second response signal are decoded using a predetermined format, and the predetermined format is a preamble, a header. And a message, wherein the determination of whether the first response signal and the second response signal collide with each other comprises: an error due to a collision of at least one of the preamble, the header, and the message occurs. 2 may be determined based on whether the response signal cannot be restored.

According to an embodiment, the power converter 111 periodically receives a response signal of the first device that does not collide with the response signal of the second device within a first response period (Tping interval_1), and The power transmission control unit decodes the first response signal and the second response signal using a predetermined format, and whether a collision occurs between the first response signal and the second response signal based on whether the decoding is performed. It may be to determine. Here, the first response signal and the second response signal are periodically received within a second response period (Tping interval_2), and the second response period (Tping interval_2) includes both the first response signal and the second response signal. It may be determined to include more than the time that can be included, and after resetting the power transmission.

2B-Electronic device

2B, the electronic device 200 is configured to include a power supply unit 290. The power supply unit 290 supplies power required for the operation of the electronic device 200. The power supply unit 290 may include a power receiver 291 and a power receiving control unit 292.

The power receiver 291 receives power transmitted wirelessly from the wireless power transmitter 100.

The power receiver 291 may include components required to receive the wireless power signal according to a wireless power transfer method. In addition, the power receiver 291 may receive power according to one or more wireless power transfer schemes. In this case, the power receiver 291 may include components required for each scheme.

First, the power receiver 291 may be configured to include a coil for receiving a wireless power signal transmitted in the form of a magnetic or electromagnetic field having a vibrating characteristic.

For example, in some embodiments, the power receiver 291 may include a secondary coil in which a current is induced by a magnetic field that is changed as a component according to an inductive coupling scheme. Also, in some embodiments, the power receiver 291 may include a coil and a resonance forming circuit in which a resonance phenomenon is generated by a magnetic field having a specific resonance frequency as a component according to a resonance coupling scheme.

However, in some embodiments, the power receiver 291 may receive power according to one or more wireless power transfer schemes, in which case the power receiver 291 is implemented to receive using one coil, or each It may be implemented to receive using a coil formed differently according to the power transmission scheme.

Embodiments according to the inductive coupling method among the components included in the power receiver 291 will be described later with reference to FIG. 7A or 7B with reference to FIGS. 4A or 4B. .

The power receiver 291 may further include a rectifier and a regulator for converting the wireless power signal into a direct current. In addition, the power receiver 291 may further include a circuit for preventing overvoltage or overcurrent from occurring by the received power signal.

The power reception control unit 292 controls each component included in the power supply unit 290.

In detail, the power reception control unit 292 may transmit a power control message to the wireless power transmitter 100. The power control message may instruct the wireless power transmitter 100 to start or end the transmission of the wireless power signal. In addition, the power control message may instruct the wireless power transmitter 100 to adjust characteristics of the wireless power signal.

In some embodiments, the power reception control unit 292 may transmit the power control message through the wireless power signal. Also, in some embodiments, the power control control unit 292 may transmit the power control message through a method of transmitting the user data.

In order to transmit the power control message, the electronic device 200 may be further configured to further include a power demodulation / demodulation unit 293 electrically connected to the power receiver 291. The modulation and demodulation unit 293 may be used to transmit the power control message through the wireless power signal as in the case of the wireless power transmitter 100 described above. The modulation and demodulation unit 293 may be used as a means for adjusting a current and / or a voltage flowing through the power converter 111 of the wireless power transmitter 100. Hereinafter, a method in which each of the demodulators 113 and 293 of the wireless power transmitter 100 and the electronic device 200 is used for transmission and reception of a power control message through a wireless power signal will be described.

The wireless power signal formed by the power converter 111 is received by the power receiver 291. In this case, the power reception control unit 292 controls the modulation and demodulation unit 293 on the electronic device 200 side to modulate the wireless power signal. For example, the power reception control unit 292 may perform a modulation process so that the amount of power received from the wireless power signal is changed by changing the reactance of the modulation and demodulation unit 293 connected to the power reception unit 291. have. The change in the amount of power received from the wireless power signal results in a change in the current and / or voltage of the power converter 111 forming the wireless power signal. At this time, the demodulation unit 113 on the side of the wireless power transmitter 100 senses a change in current and / or voltage of the power converter 111 and performs a demodulation process.

That is, the power reception control unit 292 generates a packet including a power control message to be transmitted to the wireless power transmitter 100 to modulate the wireless power signal to include the packet, and the power The transmission control unit 112 may obtain the power control message included in the packet by decoding the packet based on a result of performing the demodulation process of the modulation / demodulation unit 113. A detailed method of obtaining the power control message by the wireless power transmitter 100 will be described later with reference to FIGS. 11A to 13.

In addition, in some embodiments, the power reception control unit 292 transmits a power control message by transmitting user data including a power control message by a communication means (not shown) included in the electronic device 200. The wireless power transmitter 100 may be transmitted.

In addition, the power supply unit 290 may be configured to further include a charging unit 298 and a battery 299.

The electronic device 200, which is supplied with power for operation from the power supply unit 290, operates by the power delivered from the wireless power transmitter 100, or uses the transferred power to the battery 299. ) May be operated by power charged in the battery 299. In this case, the power receiving control unit 292 may control the charging unit 298 to perform charging by using the transferred power.

According to one embodiment disclosed herein, a plurality of electronic devices may receive power from the wireless power transmitter 100. In this case, wireless power signals modulated by the plurality of electronic devices may collide. Accordingly, components included in the electronic device 200 may perform various operations to avoid collision of the modulated wireless power signals.

According to an embodiment, the power receiver 291 may receive a wireless power signal for power transmission from a wireless power transmitter.

In this case, the power receiving control unit 292 causes the power receiving unit 291 to transmit a third response signal corresponding to the wireless power signal after a time interval set to a first time within a first response period (Tping interval_1). Can be controlled.

Further, according to an embodiment, the power reception control unit 292 determines whether the power transmission of the wireless power transmitter 100 is reset due to the collision of the modulated wireless power signals, and based on the determination result, When the power transmission is reset, the time interval may be set to the second time.

According to an embodiment, the power reception control unit 292 may set the power response unit 291 to the second time in a second response period (Tping interval_2) in response to the wireless power signal. The transmission may be controlled after a time interval, and the second time may be determined based on a value generated by generating a random number.

Hereinafter, a wireless power transmitter and an electronic device applicable to the embodiments disclosed herein will be described.

First, a method of transmitting power to the electronic device by the wireless power transmitter according to embodiments supporting the inductive coupling method with reference to FIGS. 3 to 5 is disclosed.

3-Inductive coupling scheme

3 illustrates a concept of wirelessly transferring power from a wireless power transmitter to an electronic device according to embodiments supporting an inductive coupling scheme.

When the power transfer of the wireless power transmitter 100 follows the inductive coupling method, when the intensity of the current flowing in the primary coil in the power transmitter 110 changes, the primary coil is changed by the current. The magnetic field passing through changes. The changed magnetic field generates induced electromotive force on the secondary coil side of the electronic device 200.

According to this method, the power converter 111 of the wireless power transmitter 100 is configured to include a transmission coil (Tx coil) 1111a that acts as a primary coil in magnetic induction. In addition, the power receiver 291 of the electronic device 200 is configured to include a Rx coil (2911a) to operate as a secondary coil in magnetic induction.

First, the wireless power transmitter 100 and the electronic device 200 are disposed such that the transmitting coil 1111a of the wireless power transmitter 100 and the receiving coil of the electronic device 200 are close to each other. After that, when the power transmission control unit 112 controls the current of the transmission coil 1111a to be changed, the power receiver 291 uses the electromotive force induced in the reception coil 2911a to the electronic device 200. Control to supply power.

The efficiency of the wireless power transfer by the inductive coupling method has little influence on the frequency characteristics, but the alignment and distance between the wireless power transmitter 100 and the electronic device 200 including each coil. (distance) is affected.

Meanwhile, the wireless power transmitter 100 may be configured to include an interface surface (not shown) in the form of a flat surface for wireless power transfer by an inductive coupling method. One or more electronic devices may be placed on an upper portion of the interface surface, and the transmitting coil 1111a may be mounted on a lower portion of the interface surface. In this case, a vertical spacing is formed between the transmitting coil 1111a mounted below the interface surface and the receiving coil 2911a of the electronic device 200 located above the interface surface so that the coil is made small. The distance between them is small enough to allow efficient wireless power transfer by inductive coupling.

In addition, an array indicating unit (not shown) indicating a position where the electronic device 200 is to be placed may be formed on the interface surface. The arrangement indicator indicates the position of the electronic device 200 in which an arrangement between the transmitting coil 1111a and the receiving coil 2911a mounted below the interface surface can be suitably made. In some embodiments, the alignment indicator may be simple marks. In some embodiments, the arrangement indicating unit may be formed in the form of a protrusion structure for guiding the position of the electronic device 200. In addition, in some embodiments, the arrangement indicator is formed in the form of a magnetic body such as a magnet mounted to the lower portion of the interface surface, the coil by the mutual attraction with the magnetic material of the other pole mounted inside the electronic device 200 They may be guided to achieve a suitable arrangement.

Meanwhile, the wireless power transmitter 100 may be formed to include one or more transmission coils. The wireless power transmitter 100 may increase power transmission efficiency by selectively using a part of coils suitably arranged with the receiving coil 2911a of the electronic device 200 among the one or more transmitting coils. A wireless power transmitter 100 including the one or more transmission coils will be described below with reference to FIG. 5.

Hereinafter, the configuration of the wireless power transmitter and the electronic device of the inductive coupling method applicable to the embodiments disclosed herein will be described in detail.

4A and 4B-Wireless power transmitter and electronic device of inductive coupling method

4A and 4B are exemplary block diagrams illustrating some of the configurations of the electromagnetic induction wireless power transmitter 100 and the electronic device 200 that may be employed in the embodiments disclosed herein. A configuration of the power transmitter 110 included in the wireless power transmitter 100 will be described with reference to FIG. 4A, and the power supply unit 290 included in the electronic device 200 will be described with reference to FIG. 4B. The configuration of will be described.

Referring to FIG. 4A, the power converter 111 of the wireless power transmitter 100 may be configured to include a transmission coil (Tx coil) 1111a and an inverter 1112.

As described above, the transmitting coil 1111a forms a magnetic field corresponding to the wireless power signal according to the change of the current. In some embodiments, the transmitting coil 1111a may be implemented in a planar spiral type. Also, in some embodiments, the transmitting coil 1111a may be implemented in a cylindrical solenoid type.

The inverter 1112 transforms a DC input obtained from the power supply unit 190 into an AC waveform. The alternating current transformed by the inverter 1112 drives a resonant circuit including the transmitting coil 1111a and a capacitor (not shown) so that a magnetic field is formed in the transmitting coil 1111a. .

In addition, the power conversion unit 111 may be configured to further include a positioning unit 1114.

The positioning unit 1114 may move or rotate the transmitting coil 1111a to increase the efficiency of wireless power transfer by the inductive coupling method. This is because, as described above, the power transfer by the inductive coupling method is an alignment and distance between the wireless power transmitter 100 and the electronic device 200 including primary and secondary coils. Because it is affected. In particular, the location determiner 1114 may be used when the electronic device 200 does not exist within an active area of the wireless power transmitter 100.

Therefore, the positioning unit 1114 has a distance between the centers of the transmitting coil 1111a of the wireless power transmitter 100 and the receiving coil 2911a of the electronic device 200 within a predetermined range. And a driving unit (not shown) for moving the transmitting coil 1111a so as to be within the limit, or rotating the transmitting coil 1111a so that the center of the transmitting coil 1111a and the receiving coil 2911a overlap. Can be.

To this end, the wireless power transmitter 100 may further include a position detection unit (not shown) made of a sensor for detecting the position of the electronic device 200, and the power transmission control unit 112. ) May control the location determiner 1114 based on the location information of the electronic device 200 received from the location sensor.

In addition, for this purpose, the power transmission control unit 112 receives control information on the arrangement or distance from the electronic device 200 through the modulator 113 and based on the received control information on the arrangement or distance. The position determiner 1114 may be controlled by the controller.

If the power converter 111 is configured to include a plurality of transmission coils, the position determiner 1114 may determine which of the plurality of transmission coils will be used for power transmission. The configuration of the wireless power transmitter 100 including the plurality of transmission coils will be described later with reference to FIG. 5.

On the other hand, the power converter 111 may be configured to further include a power sensing unit 1115. The power sensing unit 1115 of the wireless power transmitter 100 monitors a current or voltage flowing through the transmission coil 1111a. The power sensing unit 1115 is for checking whether the wireless power transmitter 100 operates normally. The power sensing unit 1115 detects a voltage or current of a power supplied from the outside and determines whether the detected voltage or current exceeds a threshold. You can check it. Although not shown, the power sensing unit 1115 compares a resistance for detecting a voltage or current of a power source supplied from an external source with a threshold value of a voltage value or a current value of the detected power source, and outputs a comparison result. It may include a comparator. Based on the check result of the power sensing unit 1115, the power transmission control unit 112 may control a switching unit (not shown) to cut off power applied to the transmission coil 1111a.

Referring to FIG. 4B, the power supply unit 290 of the electronic device 200 may be configured to include a receiving coil (Rx coil) 2911a and a rectifier circuit 2913.

The current is induced in the receiving coil 2911a by the change in the magnetic field formed from the transmitting coil 1111a. An implementation of the receiving coil 2911a may be in the form of a flat spiral or a cylindrical solenoid according to embodiments as in the case of the transmitting coil 1111a.

In addition, series and parallel capacitors may be connected to the receiving coil 2911a to increase reception efficiency of wireless power or to detect resonance.

The receiving coil 2911a may be in the form of a single coil or a plurality of coils.

The rectifier circuit 2913 performs full-wave rectification on the current to convert an alternating current into a direct current. The rectifier circuit 2913 may be implemented as, for example, a full bridge rectifier circuit consisting of four diodes or a circuit using active components.

In addition, the rectifier circuit 2913 may further include a smoothing circuit (regulator) to make the rectified current to a more flat and stable direct current. In addition, the output power of the rectifier circuit 2913 is supplied to each component of the power supply 290. In addition, the rectifier circuit 2913 converts the output DC power to an appropriate voltage to match the power required for each component of the power supply unit 290 (for example, a circuit such as the charging unit 298). (DC-DC converter) may further include.

The modulation and demodulation unit 293 is connected to the power receiver 291, and may be configured as a resistive element having a change in resistance with respect to a DC current, and configured as a capacitive element having a reactance with respect to an alternating current. Can be. The power reception control unit 292 may modulate the wireless power signal received by the power reception unit 291 by changing the resistance or reactance of the modulation and demodulation unit 293.

Meanwhile, the power supply unit 290 may be configured to further include a power sensing unit 2914. The power sensing unit 2914 of the electronic device 200 monitors the voltage and / or current of the power rectified by the rectifying circuit 2913, and as a result of the monitoring, the voltage and / or current of the rectified power is increased. When the threshold value is exceeded, the power reception control unit 292 transmits a power control message to the wireless power transmitter 100 to deliver appropriate power.

5-a wireless power transmitter comprising one or more transmitting coils

FIG. 5 is a block diagram of a wireless power transmitter configured to have one or more transmitting coils receiving power according to an inductive coupling scheme that may be employed in the embodiments disclosed herein.

Referring to FIG. 5, the power converter 111 of the wireless power transmitter 100 according to the exemplary embodiments disclosed herein may be composed of one or more transmission coils 1111a-1 to 1111a-n. The one or more transmitting coils 1111a-1 to 1111a-n may be an array of partly overlapping primary coils. An active area may be determined by some of the one or more transmitting coils.

The one or more transmitting coils 1111a-1 to 1111a-n may be mounted below the interface surface. In addition, the power converter 111 may further include a multiplexer 1113 for establishing and releasing connection of some of the one or more transmission coils 1111a-1 to 1111a-n. .

When the position of the electronic device 200 on the upper surface of the interface is detected, the power transmission control unit 112 may take into account the sensed position of the electronic device 200 and the one or more transmission coils 1111a-1 to. The multiplexer 1113 may be controlled to connect coils which may be in inductive coupling relationship with the receiving coil 2911a of the electronic device 200 among the 1111a-n.

To this end, the power transmission control unit 112 may obtain location information of the electronic device 200. In some embodiments, the power transmission control unit 112 may acquire the position of the electronic device 200 on the interface surface by the position sensing unit (not shown) included in the wireless power transmitter 100. have. In another embodiment, the power transmission control unit 112 uses the one or more transmission coils 1111a-1 to 1111a-n to respectively indicate a power control message indicating the strength of a wireless power signal from an object on the interface surface; Obtaining location information of the electronic device 200 by receiving a power control message indicating the identification information of the object and determining which one of the one or more transmission coils is close to the location of the one or more transmission coils based on the received result. have.

Meanwhile, the active area may be a portion of the interface surface, and may mean a portion through which a high efficiency magnetic field may pass when the wireless power transmitter 100 wirelessly transfers power to the electronic device 200. . In this case, a single transmitting coil or a combination of one or more transmitting coils forming a magnetic field passing through the active region may be referred to as a primary cell. Accordingly, the power transmission control unit 112 determines an active area based on the detected position of the electronic device 200, establishes a connection of a main cell corresponding to the active area, and receives the electronic device 200. The multiplexer 1113 may be controlled such that the coil 2911a and the coils belonging to the main cell may be placed in an inductive coupling relationship.

Meanwhile, when one or more electronic devices 200 are disposed on an interface surface of the wireless power transmitter 100 configured to include the one or more transmission coils 1111a-1 to 1111a-n, the power transmission controller ( 112 may control the multiplexer 1113 so that coils belonging to a main cell corresponding to the location of each electronic device are in inductive coupling relationship, respectively. Accordingly, the wireless power transmitter 100 may wirelessly transmit power to one or more electronic devices by forming a wireless power signal using different coils.

In addition, the power transmission control unit 112 may be configured to supply power having different characteristics to coils corresponding to the electronic devices. In this case, the wireless power transmitter 100 may transmit power by setting different power transfer methods, efficiency, characteristics, etc. for each electronic device. Power delivery for one or more electronic devices is described below with reference to FIG. 28.

The power converter 111 may further include an impedance matching unit (not shown) for adjusting the impedance to form a resonant circuit with the connected coils.

Hereinafter, a method of transmitting power by a wireless power transmitter according to embodiments supporting a resonance coupling method will be described with reference to FIGS. 6 to 8.

Figure 6-Resonant coupling scheme

6 illustrates a concept in which power is wirelessly transmitted from a wireless power transmitter to an electronic device according to embodiments supporting a resonance coupling scheme.

First, the resonance (or resonance) will be briefly described as follows. Resonance refers to a phenomenon in which the vibration system receives a periodic external force having the same frequency as its natural frequency, and the amplitude increases markedly. Resonance is a phenomenon that occurs in all vibrations, including mechanical and electrical vibrations. In general, when a force capable of vibrating the vibration system from the outside, if the natural frequency of the vibration system and the frequency of the force applied from the outside is the same, the vibration is severe and the amplitude is also large.

In the same principle, when a plurality of vibrating bodies that are separated within a certain distance vibrate at the same frequency with each other, the plurality of vibrating bodies resonate with each other, in which case resistance between the plurality of vibrating bodies decreases. In electrical circuits, inductors and capacitors can be used to create resonant circuits.

When the power transmission of the wireless power transmitter 100 follows the resonance coupling method, the magnetic field having a specific vibration frequency is formed by the AC power in the power transmission unit 110. When a resonance phenomenon occurs in the electronic device 200 due to the formed magnetic field, power is generated in the electronic device 200 by the resonance phenomenon.

As described above, when the plurality of vibrators electromagnetically resonate with each other, power transmission efficiency may be very high because they are not affected by the peripheral objects other than the plurality of vibrators. An energy tunnel may occur between the plurality of vibrating bodies that electromagnetically resonate with each other. This is also called energy coupling or energy tail.

The resonance coupling method disclosed herein may use an electromagnetic wave having a low frequency. When transmitting power using an electromagnetic wave having a low frequency, only a magnetic field is affected to a region located within a single wavelength of the electromagnetic wave. do. This may be referred to as magnetic coupling or magnetic resonance. Such magnetic resonance may occur when the wireless power transmitter 100 and the electronic device 200 are positioned within a single wavelength of the electromagnetic wave having the low frequency.

In this case, an energy tail is formed due to the resonance, and thus the power transmission form is non-radiative. For this reason, the radioactive problem that can be commonly caused by transmitting power using electromagnetic waves can be solved.

The resonance coupling method may be a method of transmitting power using electromagnetic waves having a low frequency as described above. Therefore, the transmission coil 1111b of the wireless power transmitter 100 may form a magnetic field or electromagnetic wave for transmitting power in principle, but in the following description of the magnetic resonance side, that is, the magnetic field for the resonance coupling method. It will be described in terms of power transfer by.

The resonance frequency may be determined by, for example, the following equation (1).

Here, the resonance frequency f is determined by the inductance L and the capacitance C in the circuit. In a circuit for forming a magnetic field using a coil, the inductance may be determined by the number of rotations of the coil, etc., and the capacitance may be determined by the distance, area, etc. between the coils. In order to determine the resonance frequency, a capacitive resonance forming circuit other than the coil may be connected.

Referring to FIG. 6, in the case of embodiments in which power is wirelessly transmitted according to a resonance coupling method, the power converter 111 of the wireless power transmitter 100 may include a transmission coil (Tx coil) in which a magnetic field is formed. 1111b and a resonance forming circuit 1116 connected to the transmitting coil 1111b and configured to determine a specific vibration frequency. The resonance forming circuit 1116 may be implemented using capacitors, and the specific vibration frequency is determined based on the inductance of the transmission coil 1111b and the capacitance of the resonance forming circuit 1116. .

The circuit elements of the resonance forming circuit 1116 may be formed in various forms so that the power converter 111 may form a magnetic field, and may be connected in parallel with the transmitting coil 1111b as shown in FIG. 6. It is not limited to.

In addition, the power receiver 291 of the electronic device 200 includes a resonance forming circuit 2912 and a Rx coil configured to cause a resonance phenomenon by a magnetic field formed in the wireless power transmitter 100. 2911b). That is, the resonance forming circuit 2912 may also be implemented using a capacitive circuit, and the resonance forming circuit 2912 is based on the inductance of the receiving coil 2911b and the capacitance of the resonance forming circuit 2912. The resonance frequency is determined to be equal to the resonance frequency of the formed magnetic field.

 The circuit elements of the resonance forming circuit 2912 may be configured in various forms such that the power receiver 291 may cause resonance by the magnetic field, and is connected in series with the receiving coil 2911b as shown in FIG. 6. It is not limited to the form.

The specific vibration frequency in the wireless power transmitter 100 may be obtained by using Equation 1 with LTx and CTx. Here, when the result of substituting LRX and CRX of the electronic device 200 into Equation 1 is equal to the specific vibration frequency, resonance occurs in the electronic device 200.

According to embodiments supporting a wireless power transmission method by resonance coupling, when the wireless power transmitter 100 and the electronic device 200 resonate at the same frequency, electromagnetic waves are transmitted through a near field, Is different, there is no energy transfer between the devices.

Therefore, the efficiency of the wireless power transfer by the resonance coupling method has a large influence on the frequency characteristic, while the arrangement and the distance between the wireless power transmitter 100 and the electronic device 200 including each coil. The effect is relatively small compared to the inductive coupling method.

Hereinafter, the configuration of the wireless power transmitter and the electronic device of the resonance coupling method applicable to the embodiments disclosed herein will be described in detail.

7A and 7B-Wireless Power Transmitter of Resonant Coupling Method

7A and 7B are exemplary block diagrams illustrating a part of the configuration of the wireless power transmitter 100 and the electronic device 200 of the resonance method that may be employed in the embodiments disclosed herein.

A configuration of the power transmitter 110 included in the wireless power transmitter 100 will be described with reference to FIG. 7A.

The power converter 111 of the wireless power transmitter 100 may be configured to include a transmission coil (Tx coil) 1111b, an inverter 1112, and a resonance forming circuit 1116. The inverter 1112 may be configured to be connected to the transmission coil 1111b and the resonance forming circuit 1116.

The transmitting coil 1111b may be mounted separately from the transmitting coil 1111a for transmitting power according to the inductive coupling method, but may also be configured to transmit power in an inductive coupling method and a resonance coupling method using one single coil.

The transmitting coil 1111b forms a magnetic field for transferring power, as described above. When the AC coil is applied to the transmission coil 1111b and the resonance forming circuit 1116, vibration may occur. In this case, the transmission coil 1111b may vibrate based on the inductance of the transmission coil 1111b and the capacitance of the resonance forming circuit 1116. The frequency can be determined.

To this end, the inverter 1112 transforms the DC input obtained from the power supply unit 190 into an AC waveform, and the modified AC current is applied to the transmission coil 1111b and the resonance forming circuit 1116.

In addition, the power converter 111 may be configured to further include a frequency adjuster 1117 for changing the resonance frequency value of the power converter 111. Since the resonant frequency of the power converter 111 is determined based on inductance and capacitance in the circuit constituting the power converter 111 by Equation 1, the power transmission controller 112 is the inductance and / or The resonance frequency of the power converter 111 may be determined by controlling the frequency adjusting unit 1117 to change the capacitance.

In some embodiments, the frequency adjusting unit 1117 may be configured to include a motor capable of changing capacitance by adjusting a distance between capacitors included in the resonance forming circuit 1116. In addition, in some embodiments, the frequency adjusting unit 1117 may be configured to include a motor that can change the inductance by adjusting the number of turns or diameter of the transmission coil 1111b. In addition, in some embodiments, the frequency adjusting unit 1117 may be configured to include active elements that determine the capacitance and / or inductance.

On the other hand, the power converter 111 may be configured to further include a power sensing unit 1115. Operation of the power sensing unit 1115 is the same as described above.

A configuration of the power supply unit 290 included in the electronic device 200 will be described with reference to FIG. 7B. As described above, the power supply unit 290 may be configured to include the Rx coil 2911b and the resonance forming circuit 2912.

In addition, the power receiver 291 of the power supply unit 290 may be configured to further include a rectifier circuit 2913 for converting the alternating current generated by the resonance phenomenon into a direct current. The rectifier circuit 2913 may be configured in the same manner as described above.

In addition, the power receiver 291 may be configured to further include a power sensing unit 2914 for monitoring the voltage and / or current of the rectified power. The power sensing unit 2914 may be configured in the same manner as described above.

8-a wireless power transmitter including one or more transmitting coils

8 is a block diagram of a wireless power transmitter configured to have one or more transmitting coils receiving power according to embodiments supporting a resonance coupling scheme.

Referring to FIG. 8, the power conversion unit 111 of the wireless power transmitter 100 according to the embodiments disclosed herein is connected to one or more transmission coils 1111b-1 to 1111b-n and respective transmission coils. It may be configured to include the resonance forming circuits 1116-1 to 1116-n. In addition, the power converter 111 may further include a multiplexer 1113 for establishing and releasing connection of some of the one or more transmission coils 1111b-1 to 1111b-n. .

The one or more transmitting coils 1111b-1 to 1111b-n may be set to have the same resonance frequency. In some embodiments, some of the one or more transmitting coils 1111b-1 to 1111b-n may be set to have different resonance frequencies, which are the one or more transmitting coils 1111b-1 to 1111b-n. And the inductance and / or capacitance in which the resonance forming circuits 1116-1 to 1116-n respectively connected to each other are determined.

Meanwhile, when one or more electronic devices 200 are disposed in an active area or a sensing area of the wireless power transmitter 100 configured to include the one or more transmission coils 1111b-1 to 1111b-n, the power transmission. The controller 112 may control the multiplexer 1113 to be in a different resonance coupling relationship for each electronic device. Accordingly, the wireless power transmitter 100 may wirelessly transmit power to one or more electronic devices by forming a wireless power signal using different coils.

In addition, the power transmission control unit 112 may be configured to supply power having different characteristics to coils corresponding to the electronic devices. In this case, the wireless power transmitter 100 may transmit power by setting different power transmission schemes, resonant frequencies, efficiencies, and characteristics for each electronic device. Power delivery for one or more electronic devices is described below with reference to FIG. 28.

To this end, the frequency adjusting unit 1117 changes inductance and / or capacitance of the resonance forming circuits 1116-1 to 1116-n connected to the one or more transmitting coils 1111b-1 to 1111b-n, respectively. It can be configured to be.

Figure 9-Wireless power transmitter implemented as a charger

Meanwhile, an example of the wireless power transmitter implemented in the form of a wireless charger will be described below.

9 is a block diagram illustrating a wireless power transmitter further including an additional configuration in addition to the configuration illustrated in FIG. 2A.

As can be seen with reference to Figure 9, the wireless power transmitter 100, in addition to the power transmission unit 110 and the power supply unit 190 that supports one or more of the above-described inductive coupling method and the resonance coupling method, The sensor unit 120, the communication unit 130, an output unit 140, a memory 150, and a controller 180 may be further included.

The controller 180 controls the power converter 110, the sensor unit 120, the communication unit 130, the output unit 140, the memory 150, and the power supply unit 190.

The controller 180 may be implemented as a separate module or a single module from the power transmission control unit 112 in the power converter 110 described with reference to FIG. 2A or 2B.

The sensor unit 120 may be configured to include a sensor for detecting a position of the electronic device 200. The location information detected by the sensor unit 120 may be used to efficiently transmit power by the power converter 110.

For example, in the case of wireless power transfer according to embodiments supporting the inductive coupling method, the sensor unit 120 may operate as a detection unit, and the position information detected by the sensor unit 120 may be It may be used to move or rotate the transmission coil 1111a in the power converter 110.

In addition, for example, the wireless power transmitter 100 according to the embodiments including the one or more transmission coils described above may be based on the location information of the electronic device 200. Coils that may be placed in an inductive coupling relationship or a resonance coupling relationship with the receiving coil of 200 may be determined.

Meanwhile, the sensor unit 120 may be configured to monitor whether the electronic device 200 approaches a chargeable area. The proximity detection function of the sensor unit 120 may be performed separately from or combined with the function of the power transmission control unit 112 in the power transmission unit 110 detecting whether the electronic device 200 approaches. .

The communication unit 130 performs wired and wireless data communication with the electronic device 200. The communication unit 130 may include an electronic component for any one or more of BluetoothTM, Zigbee, Ultra Wide Band (UWB), Wireless USB, Near Field Communication (NFC), and Wireless LAN.

The output unit 140 includes at least one of the display unit 141 and the sound output unit 142. The display unit 141 may include a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (LCD). It may include at least one of a flexible display, a 3D display. The display unit 141 may display a charging state under the control of the controller 180.

The memory 150 may include a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), Random Access Memory (RAM), Static Random Access Memory (SRAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Programmable Read-Only Memory (PROM), Magnetic Memory, It may include a storage medium of at least one type of magnetic disk, optical disk. The wireless power transmitter 100 may operate in connection with a web storage that performs a storage function of the memory 150 on the Internet. The memory 150 may store a program or instructions for performing the above-described functions of the wireless power transmitter 100. The controller 180 may execute a program or commands stored in the memory 150 to wirelessly transmit power. Other components included in the wireless power transmitter 100 (eg, the controller 180) may use a memory controller (not shown) to access the memory 150.

The configuration of the wireless power transmitter according to the exemplary embodiment disclosed above may be applied to devices such as docking stations, terminal cradle devices, and other electronic devices, except when applicable only to the wireless charger. It will be apparent to those skilled in the art that the present invention may be used.

10-wireless power receiver implemented as a mobile terminal

10 illustrates a configuration when the electronic device 200 according to the embodiments disclosed herein is implemented in the form of a mobile terminal.

The mobile communication terminal 200 includes a power supply unit 290 illustrated in FIGS. 2A, 2B, 4A, 4B, 7A, or 7B.

The terminal 200 includes a wireless communication unit 210, an audio / video input unit 220, a user input unit 230, a sensing unit 240, an output unit 250, a memory 260, The interface unit 270 may further include a control unit 280. The components shown in FIG. 10 are not essential, so a terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 210 enables wireless communication between the terminal 200 and the wireless communication system, between the terminal 200 and the network where the terminal 200 is located, or between the terminal 200 and the wireless power transmitter 100. It may include one or more modules. For example, the wireless communication unit 210 may include a broadcast receiving module 211, a mobile communication module 212, a wireless internet module 213, a short range communication module 214, a location information module 215, and the like. .

The broadcast receiving module 211 receives a broadcast signal and / or broadcast related information from an external broadcast center through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast center may refer to a server that generates and transmits a broadcast signal and / or broadcast related information or a server that receives a previously generated broadcast signal and / or broadcast related information and transmits the same to a terminal. The broadcast signal may include not only a TV broadcast signal, a radio broadcast signal, and a data broadcast signal, but also a broadcast signal having a data broadcast signal combined with a TV broadcast signal or a radio broadcast signal.

The broadcast related information may mean information related to a broadcast channel, a broadcast program, or a broadcast service provider. The broadcast related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 212.

The broadcast related information may exist in various forms. For example, it may exist in the form of Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB) or Electronic Service Guide (ESG) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 211 may include, for example, Digital Multimedia Broadcasting-Terrestrial (DMB-T), Digital Multimedia Broadcasting-Satellite (DMB-S), Media Forward Link Only (MediaFLO), and Digital Video Broadcast (DVB-H). Digital broadcast signals can be received using digital broadcasting systems such as Handheld and Integrated Services Digital Broadcast-Terrestrial (ISDB-T). Of course, the broadcast receiving module 211 may be configured to be suitable for not only the above-described digital broadcast system but also other broadcast systems.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 211 may be stored in the memory 260.

The mobile communication module 212 transmits and receives a radio signal with at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data according to transmission and reception of a voice call signal, a video call call signal, or a text / multimedia message.

The wireless internet module 213 refers to a module for wireless internet access and may be built in or external to the terminal 200. Wireless Internet technologies may include Wireless LAN (Wi-Fi), Wireless Broadband (Wibro), World Interoperability for Microwave Access (Wimax), High Speed Downlink Packet Access (HSDPA), and the like.

The short range communication module 214 refers to a module for short range communication. As a wireless short range communication technology, Bluetooth®, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee®, and the like may be used. On the other hand, as a short-distance communication of the wire can be used Universal Serial Bus (USB), IEEE 1394, Thunderbolt (TM) and the like.

The wireless internet module 213 or the short range communication module 214 may establish a data communication connection with the wireless power transmitter 100.

Through the established data communication, the wireless internet module 213 or the short-range communication module 214 transmits the audio signal through the short-range communication module when there is an audio signal to be output while transmitting power wirelessly. It may be transmitted to the wireless power transmitter 100. In addition, through the established data communication, when there is information to be displayed, the wireless internet module 213 or the short range communication module 214 may transmit the information to the wireless power transmitter 100. Alternatively, through the established data communication, the wireless internet module 213 or the short range communication module 214 may receive an audio signal input through a microphone built in the wireless power transmitter 100. In addition, the wireless Internet module 213 or the short-range communication module 214 transmits the identification information of the mobile terminal 200 (eg, a phone number or device name in the case of a mobile phone) through the established data communication. The transmission device 100 may transmit.

The location information module 215 is a module for obtaining the location of the terminal, for example, a GPS (Global Position System) module.

Referring to FIG. 10, the A / V input unit 220 is for inputting an audio signal or a video signal, and may include a camera 221 and a microphone 222. The camera 221 processes an image frame such as a still image or a video obtained by an image sensor in a video call mode or a photographing mode. The processed image frame may be displayed on the display unit 251.

The image frame processed by the camera 221 may be stored in the memory 260 or transmitted to the outside through the wireless communication unit 210. Two or more cameras 221 may be provided according to a usage environment.

The microphone 222 receives an external sound signal by a microphone in a call mode, a recording mode, a voice recognition mode, etc., and processes the external sound signal into electrical voice data. The processed voice data may be converted into a form transmittable to the mobile communication base station through the mobile communication module 212 and output in the call mode. The microphone 222 may implement various noise removing algorithms for removing noise generated while receiving an external sound signal.

The user input unit 230 generates input data for the user to control the operation of the terminal. The user input unit 230 may include a key pad dome switch, a touch pad (static pressure / capacitance), a jog wheel, a jog switch, and the like.

The sensing unit 240 may include a proximity sensor 241, a pressure sensor 242, a motion sensor 243, and the like. The proximity sensor 241 may detect the presence or absence of an object approaching the mobile terminal 200 or an object present in the vicinity of the mobile terminal 200 without mechanical contact. The proximity sensor 241 may detect a proximity object by using a change in an alternating magnetic field or a change in a static magnetic field, or by using a change rate of capacitance. The proximity sensor 241 may be provided with two or more according to the configuration aspect.

The pressure sensor 242 may detect whether pressure is applied to the mobile terminal 200 and the magnitude of the pressure. The pressure sensor 242 may be installed at a portion of the mobile terminal 200 that requires the detection of pressure according to the use environment. If the pressure sensor 242 is installed in the display unit 251, a touch input through the display unit 251 and a pressure greater than the touch input are generated according to the signal output from the pressure sensor 242. The pressure touch input applied can be identified. In addition, according to the signal output from the pressure sensor 242, it can also know the magnitude of the pressure applied to the display unit 251 when the pressure touch input.

The motion sensor 243 detects the position or movement of the mobile terminal 200 using an acceleration sensor, a gyro sensor, or the like. The acceleration sensor that can be used for the motion sensor 243 is an element that converts the acceleration change in one direction into an electrical signal. Accelerometers are usually configured by mounting two or three axes in one package. Depending on the environment, only one axis may be needed. Therefore, if for some reason it is necessary to use the acceleration sensor in the X-axis or Y-axis direction instead of the Z-axis direction, the acceleration sensor may be mounted on the main substrate using a separate engraving substrate. In addition, the gyro sensor is a sensor for measuring the angular velocity of the mobile terminal 200 performing a rotational movement, and may sense a rotated angle with respect to each reference direction. For example, the gyro sensor may detect respective rotation angles, ie, azimuth, pitch, and roll, based on three axes.

The output unit 250 is used to generate an output related to sight, hearing, or tactile sense, and includes a display unit 251, an audio output module 252, an alarm unit 253, and a haptic module 254. Can be.

The display unit 251 displays (outputs) information processed by the terminal 200. For example, when the terminal is in the call mode, the terminal displays a user interface (UI) or a graphic user interface (GUI) related to the call. When the terminal 200 is in a video call mode or a photographing mode, the terminal 200 displays a photographed and / or received image, a UI, or a GUI.

The display unit 251 includes a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (flexible). and at least one of a 3D display.

Some of these displays can be configured to be transparent or light transmissive so that they can be seen from the outside. This may be referred to as a transparent display. A representative example of the transparent display is TOLED (Transparent OLED). The rear structure of the display unit 251 may also be configured as a light transmissive structure. With this structure, the user can see the object located behind the terminal body through the area occupied by the display unit 251 of the terminal body.

According to an implementation form of the terminal 200, two or more display units 251 may exist. For example, a plurality of display units may be spaced apart or integrally disposed on one surface of the terminal 200, or may be disposed on different surfaces.

When the display unit 251 and a sensor for detecting a touch operation (hereinafter, referred to as a touch sensor) form a mutual layer structure (hereinafter referred to as a touch screen), the display unit 251 may be used in addition to an output device. Can also be used as an input device. The touch sensor may have, for example, a form of a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in pressure applied to a specific portion of the display unit 251 or capacitance generated in a specific portion of the display unit 251 into an electrical input signal. The touch sensor may be configured to detect not only the position and area of the touch but also the pressure at the touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and then transmits the corresponding data to the controller 280. As a result, the controller 280 may determine which area of the display unit 251 is touched.

The proximity sensor 241 may be disposed in the inner region of the terminal covered by the touch screen or near the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or an object present in the vicinity without using a mechanical contact by using an electromagnetic force or infrared rays. Proximity sensors have a longer life and higher utilization than touch sensors.

Examples of the proximity sensor include a transmission photoelectric sensor, a direct reflection photoelectric sensor, a mirror reflection photoelectric sensor, a high frequency oscillation proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. When the touch screen is capacitive, the touch screen is configured to detect the proximity of the pointer by the change of the electric field according to the proximity of the pointer. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of allowing the pointer to be recognized without being in contact with the touch screen so that the pointer is located on the touch screen is referred to as a "proximity touch", and the touch The act of actually touching the pointer on the screen is called "contact touch." The position where the proximity touch is performed by the pointer on the touch screen refers to a position where the pointer is perpendicular to the touch screen when the pointer is in proximity proximity.

The proximity sensor detects a proximity touch and a proximity touch pattern (for example, a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, and a proximity touch movement state). Information corresponding to the sensed proximity touch operation and proximity touch pattern may be output on the touch screen.

The sound output module 252 may output audio data received from the wireless communication unit 210 or stored in the memory 260 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. The sound output module 252 may also output a sound signal related to a function (for example, a call signal reception sound or a message reception sound) performed in the terminal 200. The sound output module 252 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 253 outputs a signal for notifying occurrence of an event of the terminal 200. Examples of events generated in the terminal include call signal reception, message reception, key signal input, and touch input. The alarm unit 253 may output a signal for notifying an occurrence of an event by vibration, in addition to a video signal or an audio signal. The video signal or the audio signal may also be output through the display unit 251 or the audio output module 252, so that they 251 and 252 may be classified as part of the alarm unit 253.

The haptic module 254 generates various haptic effects that a user can feel. Vibration is a representative example of the haptic effect generated by the haptic module 254. The intensity and pattern of vibration generated by the haptic module 254 can be controlled. For example, different vibrations may be synthesized and output or may be sequentially output.

In addition to the vibration, the haptic module 254 may be used to stimulate a pin array that vertically moves with respect to the contact skin surface, a jetting force or suction force of air through an injection or inlet, grazing to the skin surface, contact of an electrode, and electrostatic force. Various tactile effects can be generated, such as effects by the endothermic and the reproduction of a sense of cold using the elements capable of endotherm or heat generation.

The haptic module 254 may not only deliver the haptic effect through direct contact, but may also be implemented to allow the user to feel the haptic effect through a muscle sense such as a finger or an arm. Two or more haptic modules 254 may be provided according to a configuration aspect of the terminal 200.

The memory 260 may store a program for the operation of the controller 280, and may temporarily store input / output data (eg, a phone book, a message, a still image, a video, etc.). The memory 260 may store data regarding vibration and sound of various patterns output when a touch input on the touch screen is performed.

In some embodiments, an operating system (not shown) in the memory 260, a module performing a function of the wireless communication unit 210, a module operating in conjunction with the user input unit 230, and an A / V input unit 220. Software components including a module operating in conjunction with a module operating in conjunction with the output unit 250 may be stored. The operating system (e.g., LINUX, UNIX, OS X, WINDOWS, Chrome, Symbian, iOS, Android, VxWorks or other embedded operating systems) is a variety of software for controlling system tasks such as memory management, power management, etc. It may include components and / or drivers.

In addition, the memory 260 may store a setting program related to wireless power transmission or wireless charging. The setting program may be executed by the controller 280.

In addition, the memory 260 may store an application related to wireless power transmission (or wireless charging) downloaded from an application providing server (eg, an app store). The wireless power transmission related application is a program for controlling wireless power transmission, and the electronic device 200 wirelessly receives power from the wireless power transmitter 100 through the corresponding program or the wireless power transmitter 100. Connection for data communication).

The memory 260 may include a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or xD memory), RAM (Random Access Memory, RAM), Static Random Access Memory (SRAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Programmable Read-Only Memory (PROM), Magnetic Memory, Magnetic It may include a storage medium of at least one type of disk, optical disk. The terminal 200 may operate in association with a web storage that performs a storage function of the memory 260 on the Internet.

The interface unit 270 serves as a path with all external devices connected to the terminal 200. The interface unit 270 receives data from an external device, receives power, transfers the power to each component inside the terminal 200, or transmits the data inside the terminal 200 to an external device. For example, wired / wireless headset ports, external charger ports, wired / wireless data ports, memory card ports, ports for connecting devices with identification modules, audio input / output (I / O) ports, The video input / output (I / O) port, the earphone port, and the like may be included in the interface unit 270.

The identification module is a chip that stores various information for authenticating the use authority of the terminal 200, and includes a user identification module (UIM), a subscriber identity module (SIM), and a universal user authentication module (Universal). Subscriber Identity Module, USIM) and the like. A device equipped with an identification module (hereinafter referred to as an 'identification device') may be manufactured in the form of a smart card. Therefore, the identification device may be connected to the terminal 200 through a port.

When the terminal 200 is connected to an external cradle, the interface unit may be a passage for supplying power from the cradle to the terminal 200, or various command signals input from the cradle by a user may be transmitted to the terminal. It can be a passage. Various command signals or power input from the cradle may be operated as signals for recognizing that the terminal is correctly mounted on the cradle.

The controller 280 typically controls the overall operation of the terminal. For example, perform related control and processing for voice calls, data communications, video calls, and the like. The controller 280 may include a multimedia module 281 for playing multimedia. The multimedia module 281 may be implemented in the controller 280 or may be implemented separately from the controller 280. In addition, the controller 180 may be implemented as a separate module or a single module from the power receiving controller 292 in the power supply unit 290 described with reference to FIG. 2A or 2B.

The controller 280 may perform a pattern recognition process for recognizing a writing input or a drawing input performed on the touch screen as text and an image, respectively.

The controller 280 performs wired charging or wireless charging according to a user input or an internal input. Here, the internal input is a signal indicating that the induced current generated from the secondary coil inside the terminal is detected.

When the above-described wireless charging is performed, an operation of the controller 280 to control each component will be described in detail with reference to the operation state of FIG. 14. As described above, the power reception control unit 292 in the power supply unit 290 may be included in the control unit 280, and the operation by the power reception control unit 292 in the present specification is the control unit 280 Can be understood as performing.

The power supply unit 290 receives an external power source and / or an internal power source under the control of the controller 280 to supply power for operation of each component.

The power supply unit 290 may include a battery 299 for supplying power to each component of the terminal 200, and may include a charging unit 298 for wired or wireless charging of the battery 299.

Although the present disclosure discloses a mobile terminal as an apparatus for receiving power wirelessly as an example, except that the configuration according to the embodiments described herein is applicable only to the mobile terminal, it may be applied to a fixed terminal such as a digital TV or a desktop computer. It will be readily apparent to one skilled in the art that the present invention may be applied.

11A and 11B- Backscatter Modulation

11A and 11B illustrate a concept of transmitting and receiving a packet between a wireless power transmitter and an electronic device through modulation and demodulation of a wireless power signal in wireless power transfer according to embodiments disclosed herein.

Referring to FIG. 11A, the wireless power signal formed by the power converter 111 forms a closed loop in a magnetic field or an electromagnetic field. When the device 200 modulates the wireless power signal while receiving the wireless power signal, the wireless power transmitter 100 may detect the modulated wireless power signal. The demodulation unit 113 may demodulate the sensed wireless power signal and decode the packet from the demodulated wireless power signal.

Meanwhile, a modulation method used for communication between the wireless power transmitter 100 and the electronic device 200 may be amplitude modulation. As described above, in the amplitude modulation method, the modulation / demodulation unit 293 on the side of the electronic device 200 changes the amplitude of the wireless power signal 10a formed by the power conversion unit 111 so that the wireless power transmitter Modulation and demodulation unit 293 on the (100) side may be a backscatter modulation scheme for detecting the amplitude of the modulated wireless power signal 10b.

Specifically, referring to FIG. 11B, the power reception control unit 292 of the electronic device 200 may load the wireless power signal 10a received through the power reception unit 291 in the load demodulation unit 293. Modulate by changing (Impedance). The power reception control unit 292 modulates the wireless power signal 10a to include a packet including a power control message to be transmitted to the wireless power transmitter 100.

Thereafter, the power transmission control unit 112 of the wireless power transmitter 100 demodulates the modulated wireless power signal 10b through an envelope detection process, and decodes the detected signal 10c. It decodes into digital data 10d. The demodulation process detects that a current or voltage flowing through the power converter 111 is divided into two states, an HI phase and a LO state, by the modulated wireless power signal. The electronic device 200 acquires a packet to be transmitted based on digital data classified according to FIG.

Hereinafter, a process of acquiring a power control message to be transmitted by the electronic device 200 from the demodulated digital data by the wireless power transmitter 100 will be described.

12A and 12B- Bit  Encoding, Byte Format

12A and 12B illustrate a method of displaying data bits and bytes in which the wireless power transmitter 100 configures a power control message.

Referring to FIG. 12A, the power transmission control unit 112 detects an encoded bit from the envelope detected signal using the clock signal CLK. The detected encoded bits are encoded according to the bit encoding method used in the modulation process on the electronic device 200 side. In some embodiments, the bit encoding method may be non-return to zero (NRZ). In some embodiments, the bit encoding method may be bi-phase encoding.

For example, in some embodiments, the detected bit may be differential bi-phase (DBP) encoded. According to the DBP encoding, the power reception control unit 292 of the electronic device 200 has two state transitions for encoding data bit 1, and one state transition for encoding data bit 0. To have. That is, data bit 1 is encoded such that a transition between a HI state and a LO state occurs at a rising edge and a falling edge of the clock signal, and data bit 0 is HI at the rising edge of the clock signal. The transition between state and LO state may be encoded to occur.

Meanwhile, the power transmission control unit 112 may obtain data in units of bytes using a byte format constituting a packet from the detected bit string according to the bit encoding method. In some embodiments, the detected bit string may be transmitted using an 11-bit asynchronous serial format as shown in FIG. 12B. That is, it may include a start bit for notifying the start of the byte and a stop bit for notifying the end of the byte, and include data bits b0 to b7 between the start bit and the end bit. In addition, a parity bit may be added to check for errors in the data. The byte data constitutes a packet including a power control message.

Figure 13-Packet Format

FIG. 13 illustrates a packet including a power control message used in a wireless power delivery method according to embodiments disclosed herein.

The packet 500 may be configured to include a preamble 510, a header 520, a message 530, and a checksum 540.

The preamble 510 is used to synchronize the data received by the wireless power transmitter 100 and accurately detect the start bit of the header 520. The preamble 510 may be configured such that the same bit is repeated. For example, the preamble 510 may be configured such that data bit 1 according to the DBP encoding is repeated 11 to 25 times.

The header 520 is used to indicate the type of the packet 500. The size and type of the message 530 may be determined based on the value indicated by the header 520. The header 520 is a value having a constant size and is located after the preamble 510. For example, the header 520 may be one byte in size.

The message 530 is configured to include data determined based on the header 520. The message 530 has a size determined according to the type.

The checksum 540 is used to detect an error that may occur in the header 520 and the message 530 while a power control message is being transmitted. The header 520 and the message 530 except for the preamble 510 for synchronization and the checksum 540 for error checking may be referred to as a command packet (command_packet).

Figure 14-Operating state ( Phases )

Hereinafter, operation states of the wireless power transmitter 100 and the electronic device 200 will be described.

FIG. 14 illustrates operation states of the wireless power transmitter 100 and the electronic device 200 according to the embodiments disclosed herein. 15 to 19 illustrate a structure of packets including a power control message between the wireless power transmitter 100 and the electronic device 200.

Referring to FIG. 14, an operation state of the wireless power transmitter 100 and the electronic device 200 for wireless power transmission may include a selection phase 610, a detection phase 620, and an identification state. And a configuration state (Identification and Configuration Phase) 630 and a power transfer phase 640.

In the selection state 610, the wireless power transmitter 100 detects whether objects exist within a range in which power can be transmitted wirelessly, and in the detection state 620, the wireless power transmitter ( 100 sends a detection signal to the detected object, and the electronic device 200 sends a response to the detection signal.

In addition, in the identification and setting state 630, the wireless power transmitter 100 identifies the selected electronic device 200 through previous states and obtains setting information for power transmission. In the power transmission state 640, the wireless power transmitter 100 transmits power to the electronic device 200 while adjusting power transmitted in response to a control message received from the electronic device 200. .

Hereinafter, each operation state will be described in detail.

1) Selection Phase

The wireless power transmitter 100 in the selection state 610 performs a detection process to select the electronic device 200 existing in the sensing area. As described above, the sensing area refers to an area in which an object in the corresponding area may affect the characteristics of the power of the power converter 111. Compared to the detection state 620, the detection process for the selection of the electronic device 200 in the selection state 610, instead of receiving a response from the electronic device 200 using a power control message, The power conversion unit of the wireless power transmitter 100 detects a change in the amount of power for forming the wireless power signal and checks whether an object exists within a predetermined range. The detection process in the selection state 610 may be referred to as an analog detection process (analog ping) in that an object is detected using a wireless power signal instead of a digital packet in the detection state 620 to be described later. .

The wireless power transmitter 100 in the selection state 610 may detect that an object enters or leaves the detection area. In addition, the wireless power transmitter 100 may distinguish between the electronic device 200 capable of wirelessly transmitting power and other objects (eg, a key, a coin, etc.) among objects in the sensing area. .

As described above, since distances to which power can be wirelessly transmitted are different according to the inductive coupling method and the resonance coupling method, the sensing areas in which the object is detected in the selection state 610 may be different from each other.

First, in embodiments in which power is transmitted according to an inductive coupling method, the wireless power transmitter 100 in the selection state 610 may monitor an interface surface (not shown) to detect placement and removal of objects. have.

In addition, the wireless power transmitter 100 may detect the position of the electronic device 200 placed on the interface surface. As described above, the wireless power transmitter 100 formed to include one or more transmitting coils enters the detection state 620 in the selection state 610 and uses each coil in the detection state 620. To determine whether a response to the detection signal is transmitted from the object or to enter the identification state 630 to determine whether identification information is transmitted from the object. The wireless power transmitter 100 may determine a coil to be used for wireless power transmission based on the detected position of the electronic device 200 obtained through the above process.

In addition, in embodiments in which power is transmitted according to a resonance coupling method, the wireless power transmitter 100 in the selection state 610 may have at least one of a frequency, a current, and a voltage of the power converter due to an object in the sensing area. The object can be detected by detecting the change.

Meanwhile, the wireless power transmitter 100 in the selection state 610 may detect an object by at least one of the detection methods according to the inductive coupling method and the resonance coupling method. The wireless power transmitter 100 performs an object detection process according to each power transmission method, and then detects the object in a combination method for wireless power transfer in order to proceed to other states 620, 630, and 640. You can choose one.

Meanwhile, the wireless power transmitter 100 in the selected state 610 performs digital detection, identification, setting, and power transmission in a wireless power signal formed to detect an object and subsequent states 620, 630, and 640. The wireless power signal to be formed may have different characteristics such as frequency and strength. This is because the selected state 610 of the wireless power transmitter 100 corresponds to an idle phase for detecting an object, so that the wireless power transmitter 100 may reduce power consumption in standby or may be effective. This is to generate a signal specialized for detecting an object.

2) Ping Phase

The wireless power transmitter 100 in the detection state 620 detects the electronic device 200 existing in the detection area through a power control message. Compared to the detection process of the electronic device 200 using the characteristics of the wireless power signal in the selection state 610, the detection process in the detection state 620 may be referred to as a digital ping process.

In the detection state 620, the wireless power transmitter 100 forms a wireless power signal for detecting the electronic device 200, demodulates a wireless power signal modulated by the electronic device 200, Obtain a power control message in the form of digital data corresponding to the response to the detection signal from the demodulated wireless power signal. The wireless power transmitter 100 may recognize the electronic device 200 that is the target of power transmission by receiving a power control message corresponding to the response to the detection signal.

The detection signal formed by the wireless power transmitter 100 in the detection state 620 to perform a digital detection process is a wireless power signal formed by applying a power signal of a specific operating point for a predetermined time. Can be. The operation point may mean a frequency, a duty cycle, and an amplitude of a voltage applied to a Tx coil. The wireless power transmitter 100 may generate the detection signal generated by applying the power signal of the specific operation point for a predetermined time and attempt to receive a power control message from the electronic device 200.

Meanwhile, the power control message corresponding to the response to the detection signal may be a message indicating the strength of the wireless power signal received by the electronic device 200. For example, the electronic device 200 receives a signal strength packet 5100 including a message indicating the strength of the received wireless power signal as a response to the detection signal as shown in FIG. 15. Can transmit The packet 5100 may be configured to include a header 5120 indicating that the packet indicates a signal strength and a message 5130 indicating the strength of a power signal received by the electronic device 200. The strength of the power signal in the message 5130 may be a value indicating a degree of coupling for inductive coupling or resonance coupling for power transmission between the wireless power transmitter 100 and the electronic device 200.

After receiving the response message to the detection signal, the wireless power transmitter 100 discovers the electronic device 200, the wireless power transmitter 100 may extend the digital detection process to enter the identification and detection state 630. That is, after discovering the electronic device 200, the wireless power transmitter 100 may receive a power control message required in the identification and detection state 630 by maintaining a power signal of the specific operation point.

However, when the wireless power transmitter 100 does not find the electronic device 200 capable of delivering power, the operating state of the wireless power transmitter 100 may return to the selection state 610. .

3) Identification and Configuration Phase

The wireless power transmitter 100 in the identification and setting state 630 may receive the identification information and / or setting information transmitted by the electronic device 200 and control the power transfer to be performed efficiently.

In the identification and setting state 630, the electronic device 200 may transmit a power control message including its own identification information. To this end, the electronic device 200 may transmit, for example, an identification packet 5200 including a message indicating identification information of the electronic device 200 as illustrated in FIG. 16A. The packet 5200 may be configured to include a header 5220 indicating that the packet indicates identification information and a message 5230 including identification information of the electronic device. The message 5230 includes information (2531 and 5232) indicating the version of the protocol for wireless power transmission, information (5233) identifying the manufacturer of the electronic device 200, information (5234) indicating the presence or absence of the expansion device identifier. And a basic device identifier 5235. In addition, when it is indicated that the extended device identifier exists in the information 5342 indicating the presence or absence of the extended device identifier, an Extended Identification Packet 5300 including the extended device identifier as shown in FIG. It can be sent separately. The packet 5300 may be configured to include a header 5320 indicating that the packet indicates an extended device identifier and a message 5330 including the extended device identifier. When the extended device identifier is used as described above, information based on the manufacturer's identification information 5333, the basic device identifier 5235, and the extended device identifier 5330 may be used to identify the electronic device 200. Can be used.

In the identification and setting state 630, the electronic device 200 may transmit a power control message including information on the expected maximum power. To this end, the electronic device 200 may transmit, for example, a configuration packet 5400 as illustrated in FIG. 17. The packet may be configured to include a header 5520 indicating that the packet is a setup packet and a message 5430 including information on the expected maximum power. The message 5430 includes a power class 5523, information about an expected maximum power 5432, an indicator 5435 indicating how to determine the current of a primary cell on the wireless power transmitter side, and an optional number of configuration packets ( 5434). The indicator 5433 may indicate whether or not the current of the main cell of the wireless power transmitter side is to be determined as specified in the protocol for wireless power transmission.

Meanwhile, according to embodiments of the present disclosure, the electronic device 200 may transmit a power control message including its required power information or profile information to the wireless power transmitter 100. In some embodiments, the requested power information or the profile information of the electronic device 200 may be included in the configuration packet 5400 as shown in FIG. 17 and transmitted. In some embodiments, the required power information or the profile information of the electronic device 200 may be included in a packet for separate configuration and transmitted.

The wireless power transmitter 100 may generate a power transfer contract used to charge power with the electronic device 200 based on the identification information and / or configuration information. The power transfer protocol may include limits of parameters that determine power transfer characteristics in the power transfer state 640.

The wireless power transmitter 100 may end the identification and setting state 630 before returning to the power transfer state 640 and return to the selection state 610. For example, the wireless power transmitter 100 may end the identification and setting state 630 to find another electronic device that can receive power wirelessly.

4) Power Transfer Phase

The wireless power transmitter 100 in the power transmission state 640 transmits power to the electronic device 200.

The wireless power transmitter 100 may receive a power control message from the electronic device 200 while transmitting power, and adjust a characteristic of power applied to the transmission coil in response to the received power control message. . For example, the power control message used to adjust the power characteristic of the transmission coil may be included in a control error packet 5500 as shown in FIG. 18. The packet 5500 may be configured to include a header 5520 indicating a control error packet and a message 5530 including a control error value. The wireless power transmitter 100 may adjust power applied to the transmission coil according to the control error value. That is, the current applied to the transmitting coil can be adjusted to be maintained when the control error value is zero, to decrease when it is negative and to increase when it is positive.

In the power transfer state 640, the wireless power transmitter 100 may monitor parameters in a power transfer contract generated based on the identification information and / or configuration information. The wireless power transmitter 100 cancels and selects the power transmission when the parameters are monitored, when the power transmission with the electronic device 200 violates the limitations included in the power transfer protocol. It may return to state 610.

The wireless power transmitter 100 may end the power transfer state 640 based on a power control message transmitted from the electronic device 200.

In some embodiments, the power control requesting to stop the wireless power transfer to the wireless power transmitter 100 when the charging of the battery is completed while the electronic device 200 is charging the battery using the transferred power. You can pass a message. In this case, the wireless power transmitter 100 may end the wireless power transfer and return to the selection state 610 after receiving the message requesting to stop the power transmission.

In addition, in some embodiments, the electronic device 200 may transmit a power control message requesting renegotiation or reconfigure to update a power transfer protocol that has already been generated. The electronic device 200 may transmit a message for requesting renegotiation of the power transfer protocol when a greater amount or less power is required than the amount of currently transmitted power. In this case, after receiving the message requesting the renegotiation of the power transfer protocol, the wireless power transmitter 100 may terminate wireless power transmission and return to the identification and setting state 630.

To this end, the message transmitted by the electronic device 200 may be, for example, an end power transfer packet 5600 as illustrated in FIG. 19. The packet 5600 may be configured to include a message 5630 including a header 5620 indicating the power transmission interruption packet and a power transmission interruption code indicating the reason for the interruption. The power transfer stop code includes charge complete, internal fault, over temperature, over voltage, over current, battery failure, reset, It may indicate one of a no response or an unknown error.

Hereinafter, a reception coil of a wireless power receiver having an antenna coil unit and a wireless charging coil unit will be described with reference to FIGS. 20 to 25.

For antenna Coil  And wireless charging Coil part  Receive coil of wireless power receiver provided

Receiving coil of the wireless power receiver according to an embodiment of the present disclosure, the inner diameter is Di (Inner Diameter), the outer diameter (Outer Diameter) of the coil coil for wireless charging wound in a circular shape and the wireless charging An antenna coil part wound to surround the outer circumference of the coil part, wherein the wireless charging coil part and the antenna coil may be formed on a flexible substrate.

The flexible substrate may be a flexible (or flexible) printed circuit board or a flexible printed circuit board (FPCB).

In addition, the flexible substrate may be a film or thin printed circuit board.

According to an embodiment, the coil unit for the antenna may perform at least one function of an antenna (Near Field Communication) antenna, a radio frequency identification (RFID) antenna, a frequency modulation (FM) antenna, and a digital multimedia broadcasting (DMB) antenna. It may be to perform.

In addition, according to an embodiment, the inner diameter Di may be 18 mm to 22 mm, and the outer diameter Do may be 36.36 mm to 44.44 mm.

In addition, according to an embodiment, the thickness of the coil part for wireless charging may be 0.18 mm to 0.22 mm.

In addition, according to an embodiment, the number of turns of the coil part for wireless charging may be 8 to 12.

The wireless charging coil unit may include a first circular winding coil formed on an upper surface of the flexible substrate and a second circular winding coil formed on a lower surface of the flexible substrate.

In addition, according to an embodiment, the antenna coil part may be formed on a lower surface of the flexible substrate.

In addition, according to an embodiment, the wireless charging coil unit may include a lower wire layer, an intermediate insulating layer formed on the lower wire layer, and an upper wire layer formed on the intermediate insulating layer.

In addition, according to an embodiment, the bottom wire layer or the top wire layer may be made of copper.

In addition, according to an embodiment, the intermediate insulating layer may be formed of a polyimide film.

In addition, according to an embodiment, the antenna coil unit may be wound along an outer circumference of the flexible substrate.

In addition, according to one embodiment, the antenna coil portion, the length of the long side is Dil, the short side may be a winding in a rectangular shape Diw.

According to an embodiment, the Dil may be 47.52 mm to 58.08 mm, and the Diw may be 41.94 mm to 51.26 mm.

Work disclosed herein Example  According to the structure of the receiving coil

Hereinafter, with reference to FIG. 20, the configuration of a charge receiving coil in a portable electronic device charging apparatus using contactless power transmission according to an embodiment disclosed herein will be described.

20 is an exemplary view showing a receiving coil of a wireless power receiver according to an embodiment disclosed in the present specification.

Referring to FIG. 20, the receiving coil of the wireless power receiver according to the exemplary embodiment disclosed herein is a cordless charging coil part wound in a circular shape having an inner diameter of Di and an outer diameter of Do and an outer periphery of the circular winding coil. It may include a coil unit for the antenna wound to surround.

In this case, the wireless charging coil and the antenna coil portion may be formed on a flexible substrate.

According to one embodiment, the flexible substrate may be a film or thin printed circuit board.

20 shows a case where the flexible substrate is a flexible printed circuit board (FPCB).

The flexible printed circuit board (FPCB) or the flexible circuit board may have a technical meaning generally known in the art.

In general, a flexible printed circuit board (FPCB) may refer to a disc of a circuit board coated with a copper foil (copper film) that is flexibly flexed.

The FPCB manufacturing technique may be a technique of manufacturing a pattern by printing a pattern to be manufactured on a photosensitive film, attaching the printed pattern onto a copper plate, and etching the copper plate with a chemical substance. .

Thus, it may be similar to the copper plate fabrication method, in which nails are painted on aluminum plates and poured with weak acids.

A three-layer structure can be used to bond the copper foil and polyimide (PI) film with an adhesive, or a layer 2 FCCL can be used to directly diecast or hot bond the PI film to the copper foil. The layer 2 FCCL is easy to form a fine pattern and excellent in flexibility can be used in a lot of display products such as mobile phone folder, LCD, PDP module.

FIG. 20A is an exemplary diagram illustrating a top surface of a receiving coil RC100 according to an exemplary embodiment disclosed herein.

Referring to FIG. 20A, a first circular winding coil WC100 wound in a circular shape having an inner diameter of Di and an outer diameter of Do may be formed on an upper surface of the receiving coil RC100.

The first circular winding coil WC100 may form a coil part for wireless charging together with the second circular winding coil WC200 of the lower surface described below.

The conductive via V100 may be formed at a position where the end of the first circular winding coil WC100 strand is disposed.

In addition, the receiving coil RC100 may further include an adhesive tape JT100 for bonding the receiving coil RC100 to the wireless power receiver 200.

The first circular winding coil WC100 may be wound with at least one strand of wire W100.

According to an embodiment, the inner diameter Di may be 18 mm to 22 mm, and preferably 20 mm.

In addition, the outer diameter Do is 36.36 mm to 44.44 mm, preferably 40.4 mm.

In addition, according to an embodiment, the number of turns of the first circular winding coil WC100 may be 8 to 12. Preferably, the number of turns of the first circular winding coil WC100 may be 9.

Referring to FIG. 20 (b), it is an exemplary view showing a bottom surface of the receiving coil RC100 according to an embodiment disclosed herein.

Referring to FIG. 20B, a second circular winding coil WC200 wound in a circular shape having an inner diameter of Di ′ and an outer diameter of Do ′ may be formed on a bottom surface of the receiving coil RC100.

According to one embodiment, Di and Di 'may have the same value, and Do and Di' may have the same value.

Therefore, the inner diameter Di 'is 18 mm to 22 mm, preferably 20 mm. In addition, the outer diameter Do 'is 36.36 mm to 44.44 mm, preferably 40.4 mm.

In addition, the number of turns of the second circular winding coil WC200 may be the same as that of the first circular winding coil WC100.

Therefore, in this case, the number of turns of the second circular winding coil WC200 may be 8 to 12. Preferably, the number of turns of the second circular winding coil WC200 may be 9.

However, according to another embodiment, it may be larger than the number of turns of the second circular winding coil WC200. For example, when the number of turns of the first circular winding coil WC100 is 10, the number of turns of the second circular winding coil WC200 may be 20.

The second circular winding coil WC200 may form a coil part for wireless charging together with the first circular winding coil WC100 on the upper surface.

According to an embodiment, the thickness of the wireless charging coil part may be 0.18 mm to 0.22 mm.

According to one embodiment, the thickness of the wireless charging coil unit may be the sum of the thickness of the first circular winding coil (WC100) and the second circular winding coil (WC200).

In addition, according to another embodiment, the thickness of the wireless charging coil unit may mean the thickness of each of the first circular winding coil (WC100) and the second circular winding coil (WC200).

According to one embodiment, a bottom coverlay may be formed below the second circular winding coil WC200.

According to an embodiment, an antenna coil part NC100 wound around the outer circumference of the wireless charging coil part may be formed on a bottom surface of the flexible substrate (eg, FPCB).

Specifically, the antenna coil unit NC100 may be wound to surround an outer circumference of the second circular winding coil WC200.

The antenna coil unit NC100 may function as a receiver coil for receiving various signals.

For example, the antenna coil unit NC100 may include at least one antenna of a near field communication (NFC) antenna, a radio frequency identification (RFID) antenna, a frequency modulation (FM) antenna, and a digital multimedia broadcasting (DMB) antenna. It may be for performing a function.

FIG. 20B illustrates a case in which the antenna coil unit NC100 performs an antenna function for near field communication (NFC).

Accordingly, FIG. 20 illustrates a shape of a receiving coil for wireless charging with a thin film NFC antenna.

NFC antennas (or tags), which are expanding in smartphone applications, may have a similar manufacturing method to a receiving coil for wireless charging.

In addition, the NFC antenna and the receiving coil for wireless charging are very limited in a smartphone where the parts are very tightly aligned, so they can usually be placed with the battery. Therefore, when the wireless charging receiver coil and the NFC antenna are manufactured as one module without interfering with each other, the two functions can be performed with one smartphone cover mounted without having to replace the phone cover including each function. There may be advantages to use.

 However, if the two coils (antennas) are simply placed up and down or up and down, the efficiency and characteristics of the NFC and the wireless charging receiver may be affected, and the characteristics or the efficiency may be worse than those used separately.

In addition, since the two coils operate in different frequency bands, the interference problem for each circuit part during operation is not a big consideration. Therefore, it may be important to develop an optimal single module in consideration of the shape that can maintain the maximum characteristics of the two coils.

 Therefore, the technology disclosed in the present specification may be a receiving coil having a form of significantly reducing the thickness of a conventional wireless charging receiver coil by manufacturing a thin film type wireless charging receiver coil having an NFC antenna built therein using a flexible printed circuit board technology.

According to an embodiment, the antenna coil unit (or NFC coil unit NC100) may be wound along an outer circumference of the flexible substrate.

Further, according to one embodiment, the antenna coil unit (or NFC coil unit, NC100), the length of the long side is Dil, the short side may be wound in a rectangular shape Diw (Fig. 20 (b )Reference).

According to one embodiment, the Dil is 47.52 mm to 58.08 mm, preferably 52.8 mm.

In addition, the Diw may be 41.94 mm to 51.26 mm, preferably 46.6 mm.

Hereinafter, with reference to FIG. 21, the structure of the short life of the wireless charging receiver coil with a built-in thin film NFC antenna constituting the wireless charging coil unit will be described.

21 is an exemplary view showing a configuration of a cross section of a receiving coil according to an embodiment disclosed in the present specification.

Referring to FIG. 21, a receiving coil according to an exemplary embodiment of the present disclosure may sequentially cover a bottom coverlay (L100), a bottom wire layer (L200), an intermediate insulation layer (L300), and a top wire layer (L400). ) And a top adhesive tape.

Among these, the wireless charging coil unit (or the first circular winding coil WC100 and the second circular winding coil WC200, respectively) is formed on the lower wire layer L200 and the intermediate wire layer. It may include an insulating layer (L300) and the upper wire layer (L400) formed on the intermediate insulating layer.

According to one embodiment, the lower wire layer (L200) or the upper wire layer (L400) may be made of copper.

In addition, according to one embodiment, the intermediate insulating layer may be made of an insulating film (FILM).

Insulation FILM has good insulation, high TG, low dimensional deformation at high temperature, excellent heat resistance and flexibility. In addition, the chemical resistance and moisture resistance should also be excellent, POLYIMIDE and PET FILM can be used as suitable for these conditions.

Therefore, the intermediate insulation layer may be made of a polyimide film or PET FILM.

Hereinafter, design values and characteristics of a receiving coil according to an exemplary embodiment disclosed herein will be described with reference to FIGS. 22 and 25.

Work disclosed herein Example  According to receive Coil design value  And properties

22 is a diagram showing the size, thickness and number of turns of the wireless charging receiver coil of the wireless charging receiver coil with a built-in thin film type NFC coil.

Fig. 23 is a chart showing characteristic values of the receiving coil unit for wireless charging of the receiving coil for wireless charging with a built-in NFC coil.

24 is a chart showing the size and the number of turns of the NFC coil portion of the thin-film NFC coil-embedded wireless charging receiving coil.

25 is a chart showing the characteristic value of the NFC coil portion of the thin-film NFC coil-embedded wireless charging receiver coil.

With reference to FIGS. 22-25, the purpose of the techniques disclosed herein may be to reduce the physical size and thickness of a receiving coil for wireless charging using flexible printed circuit board technology (FPCB).

Still another object of the technology disclosed herein may be to embed the coil part for the NFC antenna in the wireless charging coil so that the user can use both functions in one module without replacing the corresponding cover for each product. .

To this end, we propose a receiving coil with the features (shape and numerical limitation) according to FIGS. 22 to 25.

The wireless charging receiver coil of the wireless charging receiver coil with a built-in thin film type NFC coil may have a shape as shown in FIG. 20 and a structure as illustrated in FIG. 21, and the design value thereof may be in accordance with FIG. 22.

Here, in consideration of the design margin, the inner diameter Di may be 18 mm to 22 mm, and the outer diameter Do may be 36.36 mm to 44.44 mm.

In addition, the thickness Dc of the wireless charging coil part (receive coil part) may be 0.18 mm to 0.22 mm.

In addition, the number of turns N of the wireless charging coil part (receive coil part) may be 8 to 12.

In addition, the characteristic values of the wireless charging receiver coil of the wireless charging receiver coil with a built-in thin film NFC coil are shown in FIG. 23.

Here, in consideration of the design margin, the self inductance Ls may be 15.3 uH to 18.7 uH.

In addition, the NFC coil portion of the thin-film NFC coil-embedded wireless charging receiver coil has a shape as shown in FIG. 20 and a structure as shown in FIG. 21, and a design value at this time may be according to FIG. 24.

Here, in consideration of design margin, the Dil may be 47.52 mm to 58.08 mm, and the Diw may be 41.94 mm to 51.26 mm.

In addition, the characteristic value (inductance LNFC) of the NFC coil unit of the thin film NFC coil-embedded wireless charging receiver coil may be the same as that of FIG. 25.

The above-described characteristics (shape and numerical limitations) of the receiving coils according to FIGS. 22 to 25 may be considered in consideration of both the transmission efficiency improvement and the size reduction effect of the wireless power receiver during wireless power transmission.

As described above, according to the technology disclosed in the present specification, by using a flexible printed circuit board technology, a thin film type wireless charging receiver coil with an NFC antenna is proposed, thereby greatly reducing the size and thickness of a conventional wireless charging receiver coil, thereby receiving a device. You can see the effect of reducing the size of.

The receiving coil of the wireless power receiver according to the exemplary embodiment disclosed above may be applied to a device such as a docking station, a cradle device, and other electronic devices, except when applicable only to a wireless charger. It will be readily apparent to one skilled in the art that the present invention may be applied.

The scope of the present invention is not limited to the embodiments disclosed herein, and the present invention may be modified, changed, or improved in various forms within the scope of the spirit and claims of the present invention.

100: wireless power transmitter 200: wireless power receiver
RC100: Receive Coil WC100: First Circular Winding Coil
WC200: 2nd circular winding coil NC100: Antenna coil part

Claims (15)

In the receiving coil of the wireless power receiver,
A cordless charging coil part wound in a circular shape having an inner diameter of Di and an outer diameter of Do; And
It includes a coil unit for the antenna wound to surround the outer circumference of the wireless charging coil unit,
The wireless charging coil unit and the antenna coil are formed on a flexible substrate,
The wireless charging coil unit,
A first circular winding coil (WC100) formed on an upper surface of the flexible substrate; And
A second circular winding coil (WC200) formed on the lower surface of the flexible substrate,
The coil unit for the antenna,
On the lower surface of the flexible substrate is formed to be wound in a rectangular shape with a long side length of Dil and a short side length of Diw, so as to surround the outer circumference of the second circular winding coil (WC200) of the coil for wireless charging,
The first circular winding coil WC100 includes an adhesive tape JT100 for bonding the first circular winding coil WC100 to a wireless power receiver.
A coverlay L100 is formed below the second circular winding coil WC200,
The receiving coil is,
The coverlay (L100);
Bottom wire layer L200;
An intermediate insulating layer (L300) formed on the bottom wire layer;
An upper wire layer (L400) formed on the intermediate insulating layer; And
Further comprising the adhesive tape,
The receiving coil is configured to use the wireless charging function and the antenna function of the wireless charging coil unit and the antenna coil unit in a state where one smartphone cover is mounted. The method of claim 1, wherein the flexible substrate,
A receiving coil of a wireless power receiver, which is a flexible printed circuit board (FPCB). The method of claim 1, wherein the flexible substrate,
A receiving coil of a wireless power receiver, which is a film or thin printed circuit board. The method of claim 1, wherein the antenna coil unit,
NFC (Near field communication) antenna, Radio Frequency Identification (RFID)
A reception coil of a wireless power receiver for performing a function of at least one of an antenna, a frequency modulation (FM) antenna, and a digital multimedia broadcasting (DMB) antenna. The method of claim 1, wherein the inner diameter Di,
18 mm to 22 mm,
The outer diameter Do,
A receiving coil of a wireless power receiver, 36.36 mm to 44.44 mm. The thickness of the coil unit for wireless charging,
A receiving coil of a wireless power receiver, which is 0.18 mm to 0.22 mm. The number of turns of the coil unit for wireless charging,
8 to 12 receiving coil of the wireless power receiver. delete The method of claim 1, wherein the antenna coil unit,
The receiving coil of the wireless power receiver is formed on the lower surface of the flexible substrate. delete The method of claim 1, wherein the bottom wire layer or the top wire layer,
Receiving coil of a wireless power receiver which is made of copper. The method of claim 1, wherein the intermediate insulating layer,
Receiving coil of a wireless power receiver comprising a polyimide film (polyimide film). The method of claim 1, wherein the antenna coil unit,
A receiving coil of a wireless power receiver that is wound along the outer periphery of the flexible substrate. delete The method of claim 1, wherein the Dil,
47.52 mm to 58.08 mm,
Diw is,
A receiving coil of a wireless power receiver, which is 41.94 mm to 51.26 mm.

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