KR20130015244A - Electronic device capable of being wirelessly charged - Google Patents

Abstract

PURPOSE: A wireless chargeable electronic device is provided to increase magnetic flux density by reducing the shape and structure of a magnetic shielding member. CONSTITUTION: A planar coil(2911a) is formed by winding a coil clockwise or counterclockwise. One end of a coil is arranged in the other end of the coil. One end of the coil is protrusively arranged along the lower side of the planar coil. A shielding member(2917) is contacted with the planar coil. A closed line is formed by one end and the other end of the coil.

Description

ELECTRONIC DEVICE CAPABLE OF BEING WIRELESSLY CHARGED}

This specification relates to wireless power transmission.

Near Field Communication (NFC) is a contactless short-range wireless communication technology that can transmit data with low power at a short distance by applying an RFID technology using a frequency of 13.56 MHz band. NFC has been standardized around ECMA international, and Nokia, Sony, and Philips are participating in standardization and product commercialization.

Such NFC technology may transmit data (424 kbps) at low power within a distance of 10 cm.

Using NFC, when two or more terminals are brought close together without the user's artificial manipulation, they can exchange data such as MP3 files or photos as well as basic information such as phone numbers. NFC can also replace credit or transportation cards. Recently, manufacturers and carriers have moved to embed such NFC in mobile terminals to transmit and receive various data or to implement electronic wallets.

Mobile terminals, on the other hand, have traditionally charged internal batteries via wires.

Recently, however, a method of wirelessly supplying electrical energy without contact has been proposed.

There are various methods for supplying or receiving electric energy wirelessly, but inductive coupling based on an electromagnetic induction phenomenon and an electromagnetic resonance based on an electromagnetic resonance caused by a wireless power signal of a specific frequency. Resonance Coupling).

In order to transmit and receive power in the inductive coupling method and the resonance coupling method, a transceiver is required. In a small electronic device such as a mobile terminal, the power transmission / reception unit requires a lot of space constraints.

In addition, in addition to embedding the transmitter / receiver for NFC as described above in the mobile terminal, there are many limitations in space.

However, in view of the fact that a mobile terminal includes a battery, a display, and a driving circuit, the thickness of the mobile terminal is less than 1 cm, it is very difficult to additionally mount the transceiver for the NFC and the power transceiver in the mobile terminal. it's difficult.

According to the embodiment disclosed herein, the coil for wireless power transmission and reception and the coil for short-range communication such as Near Field Communication (NFC) can be miniaturized.

The shape and structure of the coil and the magnetic shield member included in the electronic device disclosed in the present disclosure can be further miniaturized and can greatly increase the magnetic flux density. In addition, the shape and structure of the coil and the magnetic shield member included in the electronic device disclosed herein can further increase the shielding of the leakage magnetic flux.

In order to achieve the above object, the present disclosure provides an electronic device capable of wireless power transmission and reception and short-range communication. The electronic device may include a planar coil formed by winding a winding in a clockwise or counterclockwise direction, and a shielding member contacting the planar coil to block a leakage magnetic field. One end of the winding is disposed to protrude along the lower surface of the planar coil from the inner side of the plane to the outer side so as to be parallel to the other end of the winding, and one point of the winding extends in a single line to be connected to the other end of the winding. Can be placed side by side. The closed line formed by one end and the other end of the winding is used as an antenna for wireless transmission and reception of power, and the closed line formed by one end of the winding and the extended disconnection is used as an antenna for short-range wireless communication. Can be.

The upper surface of the shielding member may be formed with a groove for accommodating the protrusion of one end of the winding so that the planar coil is in close contact with each other.

A step corresponding to the area of the planar coil may be formed on the upper surface of the shield member.

The winding may be formed by winding the center of the coil to form an empty space. An upper surface of the shielding member may have a protruding surface having an area corresponding to the empty space in order to prevent the planar coil from being separated.

The present disclosure also provides an electronic device capable of wireless power transmission and reception and short-range communication. The electronic device may include a planar coil configured to allow an induced current to flow due to an external magnetic field change, and an outer circumferential surface or an inner circumferential surface of the planar coil. And a near field communication strip antenna formed to be in contact with the outer circumferential surface or the inner circumferential surface of the coil, and a shielding member contacting the planar coil and the near field communication antenna. Windings are wound in a clockwise or counterclockwise direction so that a central portion of the planar coil forms an empty space, and one end of the winding forms the lower surface of the planar coil in an outward direction from the inside of the plane to be parallel to the other end of the winding. Can be arranged to protrude along. In addition, a groove for accommodating the protrusion of one end of the winding may be formed on the upper surface of the shielding member so that the planar coil is completely in close contact.

Grooves for accommodating the planar coil and grooves for accommodating the near field communication antenna may be formed on an upper surface of the shield member. The planar coil and the near field antenna may be electrically isolated by a protrusion between the groove for accommodating the planar coil and the groove for accommodating the near field communication antenna.

An upper surface of the shielding member may have a protruding surface having an area corresponding to the empty space in order to prevent the planar coil from being separated.

In the short range communication strip antenna, a winding may be formed along an outer circumferential surface or an inner circumferential surface of the planar coil, and one end and the other end of the winding may be arranged to be parallel to one end and the other end of the planar coil.

According to the embodiment disclosed herein, the coil for wireless power transmission and reception and the coil for short-range communication such as Near Field Communication (NFC) can be miniaturized.

The shape and structure of the coil and the magnetic shield member included in the electronic device disclosed in the present disclosure can be further miniaturized and can greatly increase the magnetic flux density. In addition, the shape and structure of the coil and the magnetic shield member included in the electronic device disclosed herein can further increase the shielding of the leakage magnetic flux.

1 is an exemplary diagram conceptually showing a wireless power transmission device and an electronic device according to embodiments of the present invention.
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.
FIG. 3 illustrates a concept that power is transmitted from a wireless power transmission apparatus to an electronic apparatus wirelessly according to an inductive coupling scheme.
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.
FIG. 6 is a block diagram illustrating a wireless power transmitter further including an additional configuration in addition to the configuration illustrated in FIG. 2A.
7 illustrates a configuration when the electronic device 200 according to the embodiments disclosed herein is implemented in the form of a mobile terminal.
8 illustrates an example in which the mobile terminal illustrated in FIG. 7 is charged in an electromagnetic induction manner by the wireless power transmitter 100.
9 illustrates an example in which a coil for wireless power transmission and reception and a coil for short-range communication are combined according to the first embodiment of the present invention.
10 is an exemplary diagram illustrating a phenomenon of eddy current caused by an electromagnetic induction method.
11 shows the effect of eddy currents on wireless power transfer.
12 and 13 illustrate an example in which a coil for wireless power transmission and reception and a coil for short-range communication are combined according to a second embodiment of the present invention.
14 and 15 illustrate an example in which a coil for wireless power transmission and reception and a coil for short-range communication are combined according to a third embodiment of the present invention.
16 and 17 illustrate an example in which a coil for wireless power transmission and reception and a coil for short-range communication are combined according to a fourth embodiment of the present invention.

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 present invention. It is also to be understood that the technical terms used herein are to be interpreted in a sense generally understood by a person skilled in the art to which the present invention belongs, Should not be construed to mean, or be interpreted in an excessively reduced sense. In addition, when the technical terms used herein are incorrect technical terms that do not accurately express the spirit of the present invention, they should be replaced with technical terms that can be understood correctly by those skilled in the art. In addition, the general terms used in the present invention should be interpreted according to a predefined or prior context, and should not be construed as being excessively reduced.

Also, the singular forms "as used herein include plural referents unless the context clearly dictates otherwise. In the present application, the term "comprising" or "comprising" or the like should not be construed as necessarily including the various elements or steps described in the specification, Or may be further comprised of 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 distinct meanings or roles from each other.

Furthermore, terms including ordinals such as first, second, etc. used in this specification can be used to describe various elements, but the elements 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 a second component, and similarly, the second component may also be referred to as a first component.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It is to be noted that the accompanying drawings are only for the purpose of facilitating understanding of the present invention, and should not be construed as limiting the scope of the present invention with reference to the accompanying drawings.

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 that transfers power wirelessly required by the electronic device 200.

In addition, the wireless power transmission apparatus 100 may be a wireless charging apparatus that charges the battery of the electronic device 200 by transmitting power wirelessly. When the wireless power transmitter 100 is a wireless charging device, it will be described later with reference to FIG. 6.

In addition, the wireless power transmission apparatus 100 may be implemented in various types of devices that transmit power to the electronic device 200 that requires power in a non-contact state.

The electronic device 200 is a device capable of operating by receiving power wirelessly from the wireless power transmission device 100. Also, the electronic device 200 can charge the battery using the received wireless power.

On the other hand, the electronic apparatus for receiving power wirelessly described in the present specification can be applied to any portable electronic apparatus such as an input / output apparatus such as a keyboard, a mouse, an auxiliary output apparatus for video or audio, a cellular phone, a cellular phone, smart phone, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), tablet, or multimedia device.

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. When the electronic device is a mobile terminal, it will be described later with reference to FIG. 7.

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

The wireless power transmission by the inductive coupling method is a technology for wirelessly transmitting power by using a primary coil and a secondary coil, and the electric power is induced by inducing a current to the other coil through a magnetic field that changes in one coil by an electromagnetic induction phenomenon Say it is being delivered.

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

Hereinafter, embodiments of the wireless power transmitter 100 and the electronic device 200 disclosed herein will be described in detail. In adding reference numerals to the components of the following drawings, the same components are used the same reference numerals as much as possible even if they are displayed on different drawings.

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

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 conversion unit 111 converts the power supplied from the transmission power supply unit 190 into a wireless power signal and transmits the wireless power signal 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. For example, the power converter 111 may be configured to include a primary coil 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, the power converter 111 may be configured to include a coil (or antenna) for forming an electromagnetic field having a specific resonance frequency in order to generate a resonance phenomenon in the electronic device 200 according to a resonance coupling method.

In addition, the power converter 111 may transfer power using at least one of the above-described inductive coupling method and resonance coupling method.

Among the components included in the power converter 111, those following an inductive coupling method will be described below with reference to FIGS. 4 and 5. Those following the resonance coupling method are not closely related to the core contents of the present invention and will not be described in detail.

The power conversion unit 111 may further include a circuit for adjusting characteristics of a frequency, an applied voltage, and a current used for forming the wireless power signal.

The power transmission control unit 112 controls each component included in the power transmission unit 110. 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.

Meanwhile, an area where the wireless power signal can reach can be divided into two types. First, an active area refers to a region through which a wireless power signal that transmits power to the electronic device 200 passes. Next, a semi-active area refers to an area of interest in which the wireless power transmission apparatus 100 can detect the presence of the electronic device 200. [ Here, the power transmission control unit 112 may detect whether the electronic device 200 is placed in or removed from the active area or the sensing area. Specifically, the power transmission control unit 112 determines whether the electronic device 200 is located in the active area or the sensing area by using a wireless power signal formed in the power conversion unit 111 or a sensor provided separately Or not. For example, the power transmission control unit 112 receives the wireless power signal due to the electronic device 200 existing in the sensing area, and controls the power for the wireless power signal of the power conversion unit 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 differ depending on a wireless power transmission scheme such as an inductive coupling scheme and a resonant coupling scheme.

The power transmission control unit 112 may perform the process of identifying the electronic device 200 or may determine whether to start the 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.

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 transmission apparatus 100 may receive information to be audibly or visually output related to the electronic device 200 through the power control message, or may receive information necessary for authentication between devices .

In order to receive the power control message, the power transmission control unit 112 may use at least one of a method of receiving through the wireless power signal and a method of receiving other 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 modem unit 113 may be used to demodulate the wireless power signal modulated by the electronic device 200 and receive the power control message.

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.

Meanwhile, referring to FIG. 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 receiving unit 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, as a component according to an inductive coupling method, the power receiver 291 may include a secondary coil in which a current is induced by a changing magnetic field. In addition, the power receiver 291 may include a coil and a resonance circuit in which a resonance phenomenon is generated by an electromagnetic field having a specific resonance frequency as a component according to a resonance coupling method.

However, when the power receiver 291 receives power according to one or more wireless power transfer schemes, the power receiver 291 is implemented to receive using one coil, or differently formed according to each power transfer scheme. It may be implemented to receive using a coil.

Among the components included in the power receiver 291, those following an inductive coupling method will be described below with reference to FIG. 4.

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 order to transmit the power control message, the power reception control unit 292 may use at least one of a method of transmitting through the wireless power signal and a method of transmitting through other user data.

In order to transmit the power control message, the electronic device 200 may further include a power communication modulation / demodulation unit 293 electrically connected to the power receiving unit 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 the modulation and demodulation units 113 and 293 on the side of the wireless power transmission apparatus 100 and the side of the electronic device 200 are 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. A 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 conversion unit 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 controller 112 may acquire the power control message included in the packet by decoding the packet based on a result of the demodulation process performed by the modulation / demodulator 113.

In addition, the power receiving 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. Or transmit to 100.

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.

Hereinafter, a wireless power transmission apparatus and an electronic apparatus applicable to the embodiments disclosed herein will be described. First, a method of transferring power to the electronic device by the inductive coupling method will be described with reference to FIGS. 3 to 5.

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

When the power transmission of the wireless power transmission apparatus 100 follows the inductive coupling scheme, when the intensity of the current flowing through the primary coil in the power transmission unit 110 is changed, the primary coil The passing magnetic field changes. The thus changed magnetic field generates an 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. Also, the power receiving unit 291 of the electronic device 200 is configured to include a receiving coil (Rx coil) 2911a that operates 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. . When the power transmission control unit 112 controls the current of the transmission coil 1111a to be changed, the power receiving unit 291 transmits the power to the electronic device 200 using the electromotive force induced in the receiving coil 2911a. As shown in FIG.

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 between the mounted transmitting coil 1111a and the receiving coil 2911a of the electronic device 200 located above the interface surface is made smaller in the lower portion of the interface surface. 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. The arrangement indicating unit may be a simple mark or may be formed in the form of a protruding structure that guides the position of the electronic device 200. Alternatively, the arrangement indicating unit may be formed in the form of a magnetic body such as a magnet mounted below the interface surface, so that the coils may be arranged in a proper arrangement by mutual attraction with a magnetic body of another pole mounted inside the electronic device 200. You can also guide.

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, a configuration of an inductive coupling type wireless power transmission apparatus and an electronic apparatus applicable to the embodiments disclosed herein will be described in detail.

4 is a block diagram exemplarily illustrating a part of a configuration of an electromagnetic induction type wireless power transmitter 100 and an electronic device 200 that may be employed in the embodiments disclosed herein. A configuration of the power transmission unit 110 included in the wireless power transmitter 100 will be described with reference to FIG. 4A, and the electronic device 200 will be described with reference to FIG. 4B. The configuration of the included power supply unit 290 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. The transmission coil 1111a may be implemented in a planar spiral type or 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 transmission by the inductively coupled method is performed by the arrangement and distance between the wireless power transmission apparatus 100 including the primary and secondary coils and the electronic apparatus 200, . Particularly, the positioning unit 1114 can be used when the electronic device 200 is not present in the active area of the wireless power transmission apparatus 100.

Therefore, the positioning unit 1114 may determine that the distance between the center of the transmission coil 1111a of the wireless power transmission device 100 and the reception coil 2911a of the electronic device 200 is within a certain range And a driving unit (not shown) for moving the transmission coil 1111a so that the center of the transmission coil 1111a and the reception coil 2911a overlap with each other or rotating the transmission coil 1111a so as to overlap the center of the transmission coil 1111a and the reception coil 2911a .

For this, the wireless power transmission apparatus 100 may further include a position detection unit (not shown) configured to detect a position of the electronic device 200, and the power transmission control unit 112 May control the positioning unit 1114 based on positional information of the electronic device 200 received from the position sensor.

To this end, the power transmission control unit 112 receives control information on the arrangement or distance with the electronic device 200 through the modulation / demodulation unit 113, and based on the received control information on the arrangement or distance, The positioning unit 1114 can be controlled.

If the power conversion unit 111 is configured to include a plurality of transmission coils, the positioning unit 1114 can determine which of the plurality of transmission coils is to be used for power transmission. The configuration of the wireless power transmission apparatus 100 including the plurality of transmission coils will be described later with reference to Fig.

Meanwhile, the power conversion unit 111 may be configured to further include a power sensing unit 1115. The power sensing unit 1115 on the side of the wireless power transmission apparatus 100 monitors the current or voltage flowing in the transmission coil 1111a. The power sensing unit 1115 detects a voltage or current of a power source supplied from outside and determines whether the detected voltage or current exceeds a threshold value Can be confirmed. The power sensing unit 1115 compares a voltage or current value of the detected power source with a threshold value and outputs a result of the comparison. And a comparator. Based on the result of the detection by the power sensing unit 1115, the power transmission control unit 112 may control the switching unit (not shown) to cut off the 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. The implementation form of the receiving coil 2911a may be in the form of a flat spiral or a cylindrical solenoid, 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.

The power supply unit 290 may 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 source rectified by the rectifying circuit 2913, and if the voltage and / or current of the rectified power source If the threshold value is exceeded, the power reception control unit 292 transmits a power control message to the wireless power transmission apparatus 100 to transmit appropriate power.

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 conversion section 111 of the wireless power transmission apparatus 100 according to the embodiments disclosed herein may be configured with 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 located on the interface surface is sensed, the power transmission control unit 112 controls the power of the one or more transmission coils 1111a-1 to 1111a-1, considering the sensed position of the electronic device 200. [ 1111a-n may be connected to the receiving coil 2911a of the electronic device 200. In this case,

For this, the power transmission control unit 112 may acquire position information of the electronic device 200. For example, 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. . As another example, the power transmission control unit 112 may use the one or more transmission coils 1111a-1 to 1111a-n, respectively, to indicate a power control message indicating the strength of a wireless power signal from an object on the interface surface; The location information of the electronic device 200 may be obtained 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.

On the other hand, the active area may be a part of the interface surface, and may refer to a portion where a high efficiency magnetic field can pass when the wireless power transmission apparatus 100 transmits power wirelessly 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 activity area based on the sensed position of the electronic device 200, establishes connection of major cells corresponding to the active area, The multiplexer 1113 can be controlled so that the coil 2911a and the coils belonging to the main cell can be placed in an inductive coupling relationship.

In addition, 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.

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

FIG. 6 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 6, 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 control unit 180 controls the power conversion unit 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 controller 112 in the power converter 110 described with reference to FIG. 2.

The sensor unit 120 may be configured to include a sensor for sensing the position of the electronic device 200. The position information sensed by the sensor unit 120 may be used to allow the power conversion unit 110 to efficiently transmit power.

For example, in the case of wireless power transfer by an inductive coupling method, the sensor unit 120 may operate as a detection unit, and the position information detected by the sensor unit 120 may include the power conversion unit ( It may be used to move or rotate the transmitting coil 1111a in 110.

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

Meanwhile, the sensor unit 120 may be configured to monitor whether the electronic device 200 is approaching a chargeable area. The accessibility detection function of the sensor unit 120 may be performed separately or in combination with the function of the power transmission control unit 112 in the power transmission unit 110 to detect whether the electronic device 200 is approaching .

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 Bluetooth ^TM , Zigbee, Ultra Wide Band (UWB), Wireless USB, Near Field Communication (NFC), and Wireless LAN.

The communication unit 130 establishes a connection with the electronic device 200 to perform data communication with the electronic device 200. Connection information may be needed for the communication unit 130 to establish a connection with the electronic device 200. The connection information for establishing the connection may be information necessary for authentication or authorization. The access information may correspond to a physical (or hardware) address, a logical (or network) address, a password, or a cryptographic key of the communication unit 130.

The controller 180 may receive the connection information necessary for establishing a connection with the electronic device 200 through a power control message included in a wireless power signal modulated by the electronic device 200. The controller 180 may establish a connection for data communication with the electronic device 200 based on the received access information.

For example, when the communication unit 130 performs communication in a Bluetooth ^TM manner, the access information may correspond to a Bluetooth ^TM address. In this case, the controller 180 may control the communicator 130 to acquire the Bluetooth ^TM address through the power control message and to pair the device with the electronic device 200. Thereafter, the controller 180 may establish a connection for transmitting and receiving user data with the electronic device 200.

For example, when the communication unit 130 communicates using a wireless LAN method, the access information may include a service set identifier (SSID), wired equivalent privacy (WEP), or authentication information of Wi-Fi protected access (WPA). It may correspond to an address. In this case, the controller 180 may control the communication unit 130 to obtain the access information through the power control message and to authenticate or access the electronic device 200. Thereafter, the controller 180 may establish a connection for transmitting and receiving user data with the electronic device 200.

To this end, the controller 180 determines whether a connection is established with the electronic device 200, and when the connection result is not established and the connection information is needed for establishing the connection, the electronic device determines whether the connection is established. In operation 200, a request may be made to transmit the access information. The controller 180 may request to transmit the access information through a wireless power signal. For example, the controller 180 can request the electronic device 200 to transmit the connection information by controlling the power converter 111 to apply a specific frequency, amplitude, voltage or current to form a wireless power signal. have. The electronic device 200 may detect the wireless power signal requesting the transmission of the access information, and transmit the access information by modulating the wireless power signal to include the access information.

Meanwhile, the communication unit 130 may be in a standby state or in a disabled state in order to save power. When the controller 180 detects the electronic device 200 by using the power transmitter 110, the controller 180 may determine whether the communication unit 130 is activated. The controller 180 may control to activate the communication unit 130 when the communication unit 130 is not activated as a result of the determination.

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

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.

7 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 FIG. 2, 4, or 5.

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, An interface unit 270, and a control unit 280. The components shown in FIG. 7 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 can perform wireless communication between the terminal 200 and the wireless communication system or between the terminal 200 and the network where the terminal 200 is located or between the terminal 200 and the wireless power transmission apparatus 100 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 distance communication module 214, and a location information module 215 .

The broadcast receiving module 211 receives broadcast signals 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 a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to 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).

For example, the broadcast receiving module 211 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only (DVF-H) And a Digital Broadcasting System (ISDB-T) (Integrated Services Digital Broadcast-Terrestrial). 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 to 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 depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless Internet module 213 is a module for wireless Internet access, and may be built in or externally attached 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 is 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, a wired local area communication may be used, such as USB (Universal Serial Bus), IEEE 1394, Intel Thunderbolt.

The wireless Internet module 213 or the local area communication module 214 may establish a data communication connection with the wireless power transmission apparatus 100.

Through the established data communication, when there is an audio signal to be output while the wireless Internet module 213 or the short-range communication module 214 is transmitting power wirelessly, the audio signal is transmitted through the short- To the wireless power transmission apparatus 100. The wireless Internet module 213 or the local area communication module 214 may transmit the information to the wireless power transmission apparatus 100 through the established data communication. 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 transmission apparatus 100. [ The wireless Internet module 213 or the local area communication module 214 may transmit identification information (e.g., a telephone number or a device name in the case of a mobile phone) of the mobile terminal 200 to the wireless power To the transmission apparatus 100.

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. 7, 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 can 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. At least two cameras 221 may be provided depending on the use environment.

The microphone 222 receives an external sound signal by a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data may be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 212 when the voice data is in the call mode, and output. Various noise elimination algorithms may be implemented in the microphone 222 to remove noise generated in 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 / static), 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 can detect an object approaching the mobile terminal 200 or the presence of an object in the vicinity of the mobile terminal 200 without mechanical contact. The proximity sensor 241 can detect a nearby object by using the change of the alternating magnetic field or the change of the static magnetic field, or the rate of change of the capacitance. The proximity sensor 241 may be provided with two or more according to the configuration aspect.

The pressure sensor 242 can detect whether pressure is applied to the mobile terminal 200, the magnitude of the pressure, and the like. The pressure sensor 242 may be installed at a position where the pressure of the mobile terminal 200 needs to be detected according to the use environment. If the pressure sensor 242 is installed on the display unit 251, a touch input through the display unit 251 and a pressure greater than a touch input To identify the applied pressure touch input. In addition, the magnitude of the pressure applied to the display unit 251 when the pressure touch is input can be determined according to the signal output from the pressure sensor 242.

The motion sensor 243 detects the position or movement of the mobile terminal 200 using an acceleration sensor, a gyro sensor, or the like. An acceleration sensor that can be used in the motion sensor 243 is an element that converts an acceleration change in one direction into an electric signal. Acceleration sensors are usually constructed by mounting two or three axes in one package. Depending on the usage environment, only one axis of Z axis is required. Therefore, when the acceleration sensor in the X-axis direction or the Y-axis direction is used instead of the Z-axis direction for some reason, the acceleration sensor may be mounted on the main substrate by using a separate piece substrate. In addition, the gyro sensor is a sensor for measuring the angular velocity of the mobile terminal 200, which is rotating, and can 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 includes a display unit 251, an audio output module 252, an alarm unit 253, a haptic module 254, and the like, for generating output related to visual, auditory, .

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 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED) display, and a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. 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 an object located behind the terminal body through the area occupied by the display unit 251 of the terminal body.

There may be two or more display units 251 according to the embodiment of the terminal 200. For example, in the terminal 200, a plurality of display units may be spaced apart from one another or may be disposed integrally with each other, or may be disposed on different surfaces.

(Hereinafter, referred to as a 'touch screen') in which a display unit 251 and a sensor (hereinafter, referred to as a 'touch sensor') for sensing a touch operation form a mutual layer structure, It can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display portion 251 or a capacitance generated in a specific portion of the display portion 251 to an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of 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. Thus, the control unit 280 can know which area of the display unit 251 is touched or the like.

A proximity sensor 241 may be disposed in an inner region of the terminal to be wrapped by the touch screen or in the vicinity of 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 a nearby object without mechanical contact using the force of an electromagnetic field or infrared rays. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

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. And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. 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 pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding to the touch screen when the pointer is touched.

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

The audio output module 252 can output audio data received from the wireless communication unit 210 or stored in the memory 260 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, 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 the terminal 200 of an event occurrence. 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 informing occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 251 or the audio output module 252 so that they may be classified as a part of the alarm unit 253. [

The haptic module 254 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 254 is vibration. The intensity and pattern of the vibration generated by the hit module 254 and the like are controllable. For example, different vibrations may be synthesized and output or sequentially output.

In addition to vibration, the haptic module 254 can be used for a variety of applications including, but not limited to, a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or suction force of the air through the injection port or the suction port, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 254 can be implemented not only to transmit the tactile effect through direct contact but also to allow the user to feel the tactile effect through the muscular sensation of the finger or arm. The haptic module 254 may include two or more haptic modules according to the configuration of the terminal 200.

The memory 260 may store a program for the operation of the control unit 280 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 260 may store data on vibration and sound of various patterns output when a touch is input on the touch screen.

The memory 260 may also store a configuration program associated with wireless power transmission or wireless charging. The setting program may be executed by the control unit 280. [

In addition, the memory 260 may store an application related to wireless power transmission (or wireless charging) downloaded from an application providing server (e.g., an application store). The wireless power transmission related application is a program for controlling wireless power transmission, and the electronic device 200 receives power wirelessly from the wireless power transmission apparatus 100 via the corresponding program, ) And a data communication link.

The memory 260 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (e.g., SD or xD memory), a RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM A disk, and / or an optical disk. The terminal 200 may operate in association with a web storage that performs the storage function of the memory 260 on the Internet.

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

The identification module is a chip for storing various information for authenticating the usage right of the terminal 200 and includes a user identification module (UIM), a subscriber identity module (SIM), a universal user authentication module A Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 200 through the port.

When the terminal 200 is connected to an external cradle, the interface unit may be a path through which the power from the cradle is supplied to the terminal 200, or various command signals input from the cradle by the user are transmitted to the terminal . 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, voice communication, data communication, video communication, and the like. The control unit 280 may include a multimedia module 281 for multimedia playback. The multimedia module 281 may be implemented in the control unit 280 or may be implemented separately from the control unit 280. In addition, the controller 180 may be implemented as a separate module or a single module from the power receiving control unit 292 in the power supply unit 290 described with reference to FIG. 2.

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.

On the other hand, the wireless Internet module 213 or the short-range communication module 214 may be in a standby state or disabled (disabled) in order to save power. The controller 280 may determine whether the wireless internet module 213 or the short-range communication module 214 is activated after the wireless power signal is received by the power receiver 291. If the wireless internet module 213 or the short range communication module 214 is not activated as a result of the determination, the controller 280 controls to activate the wireless internet module 213 or the short range communication module 214. Can be.

The control unit 280 performs wired charging or wireless charging according to a user input or an internal input. Herein, the internal input is a signal indicating that the induced current generated in the secondary coil in the terminal is detected.

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 external power and internal power under the control of the controller 280 and supplies power required for operation of the respective components.

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 specification discloses a mobile terminal as an example of a device for receiving power wirelessly, the configuration according to the embodiments described herein may be applied to a fixed terminal such as a digital TV, a desktop computer, It will be readily apparent to those skilled in the art that the present invention may be applied to other embodiments.

8 illustrates an example in which the mobile terminal illustrated in FIG. 7 is charged in an electromagnetic induction manner by the wireless power transmitter 100.

As shown in FIG. 8, the magnetic field induced by the coil 1111a in the wireless power transmitter 100 is transmitted to the coil 2911a of the mobile terminal 200, and converted to electric power to convert the power to the mobile terminal 200. The battery 229 can be charged.

9 illustrates an example in which a coil for wireless power transmission and reception and a coil for short-range communication are combined according to the first embodiment of the present invention.

As can be seen with reference to Figure 9, the first embodiment of the present invention is to form a single coil in order to miniaturize the coil for wireless power transmission and reception and short-range communication, such as Near Field Communication (NFC) An example is shown.

As can be seen with reference to FIG. 9, a coil 2911 a and a magnetic shield member 2917 are shown.

The coil is planar and is formed by winding the winding clockwise or counterclockwise. One end (b) of the winding may be disposed to protrude along the lower or upper surface of the planar coil from the inner side to the outer side of the plane parallel to the other end (a) of the winding. That is, one end (b) of the winding protrudes along the upper or lower surface of the planar coil from the inside of the planar coil to the outward direction so as to be parallel to the other end (a) of the winding. That is, in order to pull out one end of the winding wound on the inner side to the outer side, it is arranged above or below the upper surface of the planar coil.

In addition, one point of the winding may extend in a single line, and may be disposed to be parallel to the other end of the winding.

One end (b) and the other end (a) of the winding may be used as an antenna for wireless transmission and reception of power, and the end (b) and the extended disconnection (c) of the winding may be used as an antenna for short range wireless communication. have. The length of the extended disconnection may be adjusted according to a short range wireless communication scheme to be used. That is, the length of the extended disconnection may be adjusted by changing the point where the winding is extended in the coil.

As described above, by using one coil, the antenna can be operated as an antenna for wireless transmission / reception of power and an antenna for short-range wireless communication.

On the other hand, the magnetic shield member 2917 is in contact with the planar coil to block the leakage current.

In this case, the magnetic shield member 2917 has a thickness of about 0.8 mm, and a winding thickness of the planar coil is about 0.3 mm. Therefore, the total thickness of the planar coil is about 0.6 mm including the protrusion of the winding. Therefore, the total thickness of the coil 2911 a and the magnetic shield member 2917 may be, for example, about 1.4 mm.

However, this thickness needs to be further miniaturized in consideration of the fact that the total thickness of the mobile terminal is manufactured to within 10 mm.

There may be an attempt to reduce the thickness of the magnetic shield member 2917, but such an attempt may increase leakage current as can be seen with reference to FIGS. 10 and 11.

FIG. 10 is an exemplary view illustrating a phenomenon of eddy current caused by an electromagnetic induction method, and FIG. 11 illustrates an effect of eddy current on wireless power transmission.

As can be seen with reference to FIG. 10, when the magnetic field is close to the conductor, an induced current occurs due to a change in the magnetic field inside the conductor, which is called an eddy current.

Such eddy currents are unintended current flows that cause abnormal signal flows or normal signal flows.

In particular, as can be seen with reference to Figure 11, when the thickness of the magnetic shield member 2917 is not sufficient, or the performance is not sufficient, the magnetic field is leaked without being blocked by the magnetic shield member 2917, the adjacent conductivity Eddy currents occur to the material 1915, such as the circuit board.

Therefore, reducing the thickness of the magnetic shield member for miniaturization may cause disadvantages in that the leakage magnetic field is greatly increased and efficiency is very low. In addition, it may cause a disadvantage that the eddy current is greatly caused.

Accordingly, the methods for miniaturizing the coil for wireless power transmission and reception and short-range communication such as near field communication (NFC) can be mounted to a small electronic device without reducing the thickness of the magnetic shield member. This will be described with reference to FIG. 17.

12 and 13 illustrate an example in which a coil for wireless power transmission and reception and a coil for short-range communication are combined according to a second embodiment of the present invention.

As can be seen with reference to FIGS. 12 and 13, the coil 2911a is adhered to the magnetic shield member 2917 by an adhesive member 2917.

The coil 2911a is flat and has a winding wound in a clockwise or counterclockwise direction.

The planar coil 2911a is formed by winding a winding in a clockwise or counterclockwise direction. The planar coil 2911a may be circular, elliptical or square. The winding of the winding is performed such that an empty area is formed inside the planar coil 2911a. In this case, the empty area inside may be circular, elliptical, or quadrangular as described above.

One end (b) of the winding may be disposed to protrude along the lower surface of the planar coil (2911a) from the inner side to the outer side of the plane parallel to the other end (a) of the winding. That is, one end (b) of the winding is protruded along the lower surface of the planar coil (2911a) from the inside of the planar coil (2911a) to the outside in parallel with the other end (a) of the winding. That is, in order to pull out one end of the winding wound on the inner side to the outer side, it is disposed below the lower surface of the planar coil.

In addition, one point of the winding may extend in a single line, and may be disposed to be parallel to the other end b of the winding.

One end (b) and the other end (a) of the winding may be used as an antenna for wireless transmission and reception of power, and the end (b) and the extended disconnection (c) of the winding may be used as an antenna for short range wireless communication. have. The length of the extended disconnection may be adjusted according to a short range wireless communication scheme to be used. That is, the length of the extended disconnection may be adjusted by changing the point where the winding is extended in the coil.

In addition, a groove for accommodating the protrusion of one end of the winding is formed on the upper surface of the shield member 2917 so that the planar coil is in close contact with each other. One end (b) and the other end (a) of the winding along the groove are guided to the outside of the magnetic shield member (2917), and one end and the other end of the winding guided to the outside is described with reference to FIG. 1112 is connected to the rectifier circuit 2913.

The depth of the groove may be formed larger than the thickness of the winding, for example 0.3mm. In addition, the width of the groove may be larger than the spaced distance so that one end and the other end is accommodated in a state in which one end and the other end of the winding are spaced apart from each other by a predetermined distance. Alternatively, the width of the groove may be formed to correspond to the thickness of the winding, so as to receive only one end of the winding. In this case, since the other end of the winding is spaced apart from one end of the winding by a predetermined distance, the other end of the winding may not be guided by the groove and may contact the upper surface of the magnetic shield member 2917.

The shielding member 2917 of such a shape can be injected by a mold, and can mass-produce at a lower cost.

As such, in the second embodiment, when the magnetic shield member 2917 has a thickness of about 0.8 mm and the winding thickness of the planar coil is about 0.3 mm, a portion where one end of the winding protrudes may be formed. Since it is received by the groove of the magnetic shield member 2917, the total thickness of the coil 2911a and the magnetic shield member 2917 can be reduced to, for example, about 1.1 mm.

14 and 15 illustrate an example in which a coil for wireless power transmission and reception and a coil for short-range communication are combined according to a third embodiment of the present invention.

The first coil 2911a-1 for wireless power transmission and reception is flat, and a winding is formed in a clockwise or counterclockwise direction. Induction current may flow in the first coil due to an external magnetic field change. The winding is wound in a clockwise or counterclockwise direction so that a central portion of the first coil 2911a-1 forms an empty space, and one end of the winding is parallel to the other end of the winding from the inside to the outside of the plane. Protrudingly disposed along the lower surface of the planar coil. The planar coil 2911a may be circular, elliptical or square. In this case, the empty area inside may be circular, elliptical, or quadrangular as described above.

The second coil 2911a-2 for short range communication is formed along the outer circumferential surface of the planar coil, but is spaced apart from the outer circumferential surface of the coil. By the winding, the second coil 2911a-2 has an antenna shape in the form of a strip.

14 and 15, a groove for accommodating the first coil and a groove for accommodating the second coil may be formed on an upper surface of the shielding member 2917. . That is, the upper surface of the shielding member 2917 may be stepped to accommodate the first coil and the second coil. In other words, a groove and a groove corresponding to the area of the second coil may be additionally formed on the upper surface of the shielding member 2917.

As such, the formed step may exhibit an effect of shielding the side surface of the first coil 2911a, that is, a side shield effect. Therefore, not only the magnetic flux density of the first coil is increased, but also the leakage magnetic field can be greatly reduced. On the other hand, the first coil and the second coil (2911a-2) by the projection between the groove for accommodating the first coil (2911a-1) and the groove for accommodating the second coil (2911a-2). Can be electrically isolated.

On the other hand, the area of the step (that is, the groove) formed on the upper surface of the shield member 2917 to accommodate the first coil is the first coil (2911a) excluding the central space of the first coil (2911a-1) It may correspond to the real area of -1). That is, the upper surface of the magnetic shield member 2917 is formed only in a portion corresponding to the actual area of the first coil (2911a-1) excluding the empty space. Accordingly, a central portion of the magnetic shield member 2917 corresponding to the empty space has a protruding surface higher than the height of the groove, and the protruding surface prevents the coil from being separated and increases the magnetic flux density. You can.

The shielding member 2917 of such a shape can be injected by a mold, and can mass-produce at a lower cost.

16 and 17 illustrate an example in which a coil for wireless power transmission and reception and a coil for short-range communication are combined according to a fourth embodiment of the present invention.

The second coil 2911a-2 for short-range communication is formed along the inner circumferential surface of the planar coil, but spaced apart from the inner circumferential surface of the coil. By the winding, the second coil 2911a-2 has an antenna shape in the form of a strip.

In addition, since the description of the configuration shown in FIGS. 16 and 17 is similar to the description of the configuration of FIGS. 14 and 15, the description above will not be repeated, and the foregoing description will apply mutatis mutandis.

The protection scope of the present invention described above 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.

Claims (10)

An electronic device capable of wireless power transmission and reception and short-range communication,
A flat coil formed by winding the winding clockwise or counterclockwise,
Here, one end of the winding is disposed to protrude along the lower surface of the planar coil from the inner side of the plane to the outer side so as to be parallel to the other end of the winding, and one point of the winding extends in a single line to form the other side of the winding. Arranged side by side with the stage;
A shield member in contact with the planar coil to block a leakage magnetic field,
Here, the closed line formed by one end and the other end of the winding is used as an antenna for wireless transmission and reception of power, and the closed line formed by one end of the winding and the extended disconnection is used as an antenna for short-range wireless communication. An electronic device, characterized in that. The method of claim 1,
The upper surface of the shield member is characterized in that the groove for accommodating the projection of one end of the winding so that the planar coil is in close contact. The method of claim 1,
An electronic device, characterized in that a step corresponding to the area of the planar coil is formed on the upper surface of the shield member. The method of claim 1,
And the winding is wound around a central portion of the coil to form an empty space. 5. The method of claim 4,
The upper surface of the shield member has a protruding surface of the area corresponding to the empty space to prevent the planar coil from being separated An electronic device capable of wireless power transmission and reception and short-range communication,
A planar coil configured to flow an induced current by an external magnetic field change,
Here, the winding is formed in a clockwise or counterclockwise direction so that the central portion of the planar coil forms an empty space, and one end of the winding is parallel to the other end of the winding to form a lower surface of the planar coil in an outward direction from the inside of the plane. Protrudingly disposed along;
A near field communication strip antenna formed along an outer circumferential surface or an inner circumferential surface of the planar coil and spaced apart from the outer circumferential surface or the inner circumferential surface of the coil;
A shielding member in contact with the planar coil and the near field communication antenna,
Wherein an upper surface of the shielding member is provided with a groove for accommodating the protrusion of one end of the winding such that the planar coil is in close contact with each other. The method according to claim 6,
And a groove for accommodating the planar coil and a groove for accommodating the near field communication antenna are formed on an upper surface of the shield member. The method of claim 7, wherein
And the planar coil and the near field antenna are electrically isolated by a protrusion between the groove for accommodating the planar coil and the groove for accommodating the near field communication antenna. The method of claim 7, wherein
The upper surface of the shield member has a protruding surface of the area corresponding to the empty space to prevent the planar coil from being separated The method of claim 6, wherein the near field communication strip antenna
A winding is formed along the outer or inner circumferential surface of the planar coil,
One end and the other end of the winding is an electronic device, characterized in that arranged in parallel with one end and the other end of the planar coil.

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