KR101811611B1 - Electronic device capable of being wirelessly charged - Google Patents

Abstract

The present specification discloses an electronic device capable of wireless power transmission / reception and short-range communication. The electronic device may include a planar coil in which a winding is formed by winding in a clockwise or counterclockwise direction, and a shielding member in contact with the planar coil to block the leakage magnetic field. Wherein one end of the winding is arranged to protrude along the lower surface of the planar coil from the inside to the outside of the plane so as to be parallel to the other end of the winding and one point of the winding extends in a single line, Can be arranged 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- .

Description

[0001] ELECTRONIC DEVICE CAPABLE OF BEING WIRELESSLY CHARGED [0002]

This specification relates to wireless power transmission.

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

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

With NFC, if two or more terminals are brought close to each other without human intervention, basic data such as a telephone number, as well as data such as MP3 files and pictures can be exchanged. In addition, NFC can be used to replace credit cards or transportation cards. In recent years, there has been a move by manufacturers and communication companies to embed such NFC in a mobile terminal to transmit and receive various data, or to implement an electronic wallet.

Meanwhile, a mobile terminal has traditionally charged an internal battery through a wire.

However, recently, a method of supplying electric energy wirelessly without contact has been proposed.

There are various methods for supplying or supplying electric energy by radio. Typically, however, inductive coupling based on electromagnetic induction phenomenon and resonance coupling based on electromagnetic resonance phenomenon by radio power signal of a specific frequency Resonance coupling.

In order to transmit and receive power in the inductive coupling system and the resonant coupling system, a transmitting and receiving unit is required. However, mounting of the power transmitting and receiving unit in a small electronic apparatus such as a mobile terminal is subject to a lot of space limitation.

In addition, there is a limitation in space in that a transmitter / receiver for NFC is built in a mobile terminal and a transmitter / receiver for transmitting / receiving the power is additionally provided.

However, it is very difficult to mount the transceiver for the NFC and the power transmitting / receiving unit additionally in the mobile terminal, because the mobile terminal has a battery, a display, and a driving circuit, it's difficult.

According to the embodiments disclosed in the present specification, it is possible to miniaturize coils for wireless power transmission and reception and coils for near field communication, such as NFC (Near Field Communication).

The shapes and structures of the coils and magnetic shield members included in the electronic apparatus disclosed in this specification can be made smaller and the magnetic flux density can be greatly increased. Further, the shapes and structures of the coils and magnetic shield members included in the electronic apparatus disclosed in this specification can further increase the shielding of the leakage magnetic flux.

In order to achieve the above-mentioned object, the present specification discloses an electronic apparatus capable of wireless power transmission and reception and short range communication. The electronic device may include a planar coil in which a winding is formed by winding in a clockwise or counterclockwise direction, and a shielding member in contact with the planar coil to block the leakage magnetic field. Wherein one end of the winding is arranged to protrude along the lower surface of the planar coil from the inside to the outside of the plane so as to be parallel to the other end of the winding and one point of the winding extends in a single line, Can be arranged 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- .

A groove may be formed in the upper surface of the shielding member to receive the protrusion of the one end of the coil so that the flat coil is completely in contact with the coil.

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

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

The present invention also provides an electronic apparatus capable of wireless power transmission and reception and short range communication. The electronic apparatus includes a planar coil configured to flow an induction current by an external magnetic field change, and a coil disposed on an outer circumferential surface or an inner circumferential surface of the planar coil A short-range communication strip antenna formed so as not to be in contact with the outer circumferential surface or the inner circumferential surface of the coil, and a shield member contacting the flat coil and the short-range communication antenna. Wherein a winding is wound clockwise or counterclockwise so that a central portion of the planar coil forms an empty space, and one end of the coil is connected to the lower surface of the planar coil from the inside to the outside of the plane so as to be parallel to the other end of the coil And can be arranged to be projected. A groove may be formed on the upper surface of the shielding member to receive the protrusion of the one end of the coil so that the flat coil is completely in contact with the coil.

The upper surface of the shielding member may have a groove for receiving the flat coil and a groove for receiving the antenna for short range communication. The planar coil and the antenna for short-range communication can be electrically isolated by the protrusion between the groove for receiving the planar coil and the groove for receiving the short-range communication antenna.

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

The strip antenna for short-range communication may have a winding formed along an outer circumferential surface or an inner circumferential surface of the planar coil, and one end and the other end of the coil may be arranged in parallel with one end and the other end of the planar coil.

According to the embodiments disclosed in the present specification, it is possible to miniaturize coils for wireless power transmission and reception and coils for near field communication, such as NFC (Near Field Communication).

The shapes and structures of the coils and magnetic shield members included in the electronic apparatus disclosed in this specification can be made smaller and the magnetic flux density can be greatly increased. Further, the shapes and structures of the coils and magnetic shield members included in the electronic apparatus disclosed in this specification 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 a configuration of a wireless power transmission apparatus 100 and an electronic device 200 that can be employed 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 showing a part of the configuration of the electromagnetic induction type wireless power transmission device 100 and the electronic device 200 that can be employed in the embodiments disclosed herein.
5 is a block diagram of a wireless power transmission apparatus configured to have one or more transmission coils that receive power in accordance with an inductive coupling scheme employable in the embodiments disclosed herein.
FIG. 6 is a block diagram showing a wireless power transmission apparatus further including an additional configuration in addition to the configuration shown in FIG. 2 (a).
FIG. 7 shows a configuration in which the electronic device 200 according to the embodiments disclosed herein is implemented in the form of a mobile terminal.
FIG. 8 shows an example in which the mobile terminal shown in FIG. 7 is charged in an electromagnetic induction manner by the wireless power transmission apparatus 100. FIG.
9 shows an example of combining a coil for wireless power transmission and reception and a coil for short-range communication according to the first embodiment of the present invention.
10 is an exemplary diagram showing the phenomenon of eddy current caused by the electromagnetic induction method.
Figure 11 shows the effect of eddy currents on wireless power transmission.
12 and 13 show an example of combining a coil for short-range communication and a coil for wireless power transmission / reception according to a second embodiment of the present invention.
Figs. 14 and 15 show an example of combining a coil for wireless power transmission and reception and a coil for short-range communication according to the third embodiment of the present invention.
16 and 17 show an example of combining a coil for wireless power transmission and reception and a coil for short-range communication according to a fourth embodiment of the present invention.

It is noted that the technical terms used herein are used only to describe specific embodiments and are not intended to limit the 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. Further, when a technical term used herein is an erroneous technical term that does not accurately express the spirit of the present invention, it should be understood that technical terms that can be understood by a person skilled in the art are replaced. 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.

Furthermore, suffixes "module" and " part "for components used in the present specification are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

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 diagram conceptually illustrating a wireless power transmission device and an electronic device according to embodiments of the present invention.

1, the wireless power transmission apparatus 100 may be a power transmission apparatus that transmits power wirelessly required by the electronic apparatus 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 transmission apparatus 100 is a wireless charging apparatus, the following description will be made with reference to FIG.

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.

The electronic device 200 may be a mobile communication terminal (e.g., a cellular phone, a cellular phone, a tablet) or a multimedia device, as will be described later. In the case where the electronic device is a mobile terminal, it will be described later with reference to FIG.

Meanwhile, the wireless power transmission apparatus 100 may transmit power wirelessly to the electronic device 200 without mutual contact using one or more wireless power transmission methods. That is, the wireless power transmission apparatus 100 uses an inductive coupling based on the electromagnetic induction phenomenon by the wireless power signal and a resonance coupling based on the electromagnetic resonance phenomenon by the wireless power signal of a specific frequency ) ≪ / RTI >

The inductively coupled wireless power transmission is a technique for wirelessly transmitting power using a primary coil and a secondary coil. The current is induced to the other coil through a magnetic field changing in one coil due to electromagnetic induction phenomenon, .

In the wireless power transmission by the resonance coupling method, resonance occurs in the electronic device 200 due to a wireless power signal transmitted from the wireless power transmission device 100, and the resonance phenomenon occurs in the wireless power transmission device 100 ) To the electronic device (200).

Hereinafter, embodiments related to the wireless power transmission apparatus 100 and the electronic apparatus 200 disclosed in the present specification will be described in detail. In the drawings, the same reference numerals as possible are used to denote the same or similar components, even if they are shown in 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. 2 (a), the wireless power transmission apparatus 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 radio power signal transmitted by the power converter 111 is formed in the form of a magnetic field or an electro-magnetic field having oscillation characteristics. For this, the power conversion unit 111 may be configured to include a coil for generating the wireless power signal.

The power conversion unit 111 may include components for forming different types of wireless power signals according to each power transmission scheme. For example, the power conversion unit 111 may be configured to include a primary coil that forms a changing magnetic field in order to induce a current in the secondary coil of the electronic device 200 according to an inductive coupling scheme. The power conversion unit 111 may be configured to include a coil (or an antenna) that forms 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 scheme.

The power conversion unit 111 may transmit power using one or more of the inductive coupling method and the resonant coupling method described above.

Among the components included in the power conversion unit 111, those following the inductive coupling scheme will be described later with reference to FIGS. 4 and 5. FIG. Those that follow the resonant coupling scheme are not closely related to the core 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 integrated with another control unit (not shown) that controls the wireless power supply apparatus 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.

The power transmission control unit 112 may determine at least one of a frequency, a voltage, and a current of the power conversion unit 111 for forming the wireless power signal. The determination of the characteristics may be made according to conditions on the side of the wireless power transmission apparatus 100 or on conditions 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, Operation can be performed.

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 the rectified power amount information, the charging status information and the identification information of the electronic device 200 One or more characteristics of the frequency, current, and voltage can be determined.

In addition, as another control operation using the power control message, the wireless power transmission apparatus 100 may perform a general control operation related to wireless power transmission 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 transmission apparatus 100 may further include a power communication modulation / demodulation unit 113 electrically connected to the power conversion unit 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 acquire a power control message by receiving user data including a power control message by communication means (not shown) included in the wireless power transmission apparatus 100 have.

2 (b), the electronic apparatus 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 receiving unit 291 receives power transmitted from the wireless power transmission apparatus 100 wirelessly.

The power receiving unit 291 may include components necessary for receiving the wireless power signal according to a wireless power transmission scheme. In addition, the power receiver 291 may receive power according to one or more wireless power transmission schemes. In this case, the power receiver 291 may include necessary components according to each scheme.

First, the power receiving unit 291 may be configured to include a coil for receiving a radio power signal transmitted in the form of a magnetic field or an electromagnetic field having an oscillating characteristic.

For example, as a component according to an inductive coupling scheme, the power receiving unit 291 may include a secondary coil whose current is induced by a changing magnetic field. The power receiving unit 291 may include a coil and a resonant circuit that generate a resonance phenomenon by an electromagnetic field having a specific resonance frequency as a component according to a resonance coupling scheme.

However, when the power receiving unit 291 receives power according to one or more wireless power transmission schemes, the power receiving unit 291 may be configured to receive using one coil, And may be implemented to receive using a coil.

Among the components included in the power receiving unit 291, those following the inductive coupling scheme will be described later with reference to FIG.

Meanwhile, the power receiving unit 291 may further include a rectifier and a regulator for converting the radio power signal into a direct current. The power receiving unit 291 may further include a circuit for preventing an overvoltage or an overcurrent from occurring due to the received power signal.

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

Specifically, the power receiving control unit 292 may transmit a power control message to the wireless power transmission apparatus 100. FIG. The power control message may instruct the wireless power transmission apparatus 100 to start or terminate the transmission of the wireless power signal. The power control message may also direct the wireless power transmission apparatus 100 to adjust the characteristics of the wireless power signal.

In order to transmit the power control message, the power control unit 292 may use at least one of a method of transmitting through the wireless power signal and a method of transmitting through the 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 modem unit 293 can be used to transmit the power control message through the wireless power signal, as in the case of the wireless power transmission apparatus 100 described above. The modem unit 293 may be used as a means for adjusting the current and / or voltage flowing through the power conversion unit 111 of the wireless power transmission apparatus 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 conversion unit 111 is received by the power receiving unit 291. At this time, the power reception control unit 292 controls the modem unit 293 of the electronic device 200 to modulate the wireless power signal. For example, the power reception control unit 292 may modify the reactance of the modem unit 293 connected to the power reception unit 291 so that the amount of power received from the wireless power signal changes accordingly 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 modulation / demodulation unit 113 of the wireless power transmission apparatus 100 detects a change in the current and / or voltage of the power conversion unit 111 and performs a demodulation process.

That is, the power reception controller 292 generates a packet including a power control message to be transmitted to the wireless power transmission apparatus 100, modulates the wireless power signal to include the packet, The transmission control unit 112 can obtain the power control message included in the packet by decoding the packet based on the demodulation process result of the modulation / demodulation unit 113.

In addition, the power reception control unit 292 transmits a power control message to the wireless power transmission apparatus 300 by transmitting user data including a power control message by communication means (not shown) included in the electronic apparatus 200, (100).

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

The electronic apparatus 200 receiving power for operation from the power supply unit 290 operates by the power transmitted from the wireless power transmission apparatus 100 or by using the transmitted power to operate the battery 299 The battery 299 can be operated by the electric power charged in the battery 299. At this time, the power receiving control unit 292 may control the charging unit 298 to perform charging using the transmitted power.

Hereinafter, a wireless power transmission apparatus and an electronic apparatus applicable to the embodiments disclosed herein will be described. 3 to 5, a method of transmitting power according to an inductive coupling scheme to the electronic apparatus is disclosed.

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.

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 scheme, the power conversion section 111 of the wireless power transmission apparatus 100 is configured to include a transmission coil (Tx coil) 1111a that operates 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.

The wireless power transmission apparatus 100 and the electronic apparatus 200 are disposed such that the transmission coil 1111a on the wireless power transmission apparatus 100 side and the reception coil on the electronic apparatus 200 side 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 transmission by the inductively coupled system has a small influence on the frequency characteristics but is influenced by the alignment and distance between the wireless power transmission apparatus 100 including the coils and the electronic apparatus 200, (distance).

Meanwhile, the wireless power transmission apparatus 100 may be configured to include an interface surface (not shown) in the form of a flat surface for wireless power transmission by the inductive coupling method. One or more electronic devices may be placed on the interface surface, and the transmission coil 1111a may be mounted on the interface surface. In this case, the vertical spacing between the transmission coil 1111a mounted on the lower surface of the interface and the reception coil 2911a of the electronic device 200 located above the interface surface is small, Is sufficiently small so that wireless power transmission by the inductive coupling scheme can be efficiently performed.

In addition, an arrangement indicator (not shown) may be formed on an upper surface of the interface to indicate a position where the electronic device 200 is to be placed. The arrangement instruction unit indicates a position of the electronic device 200 in which the arrangement between the transmission coil 1111a mounted on the lower surface of the interface and the reception coil 2911a can be made suitable. The arrangement indicator may be a simple mark or may be formed in the form of a protruding structure for guiding the position of the electronic device 200. Or the array direction is formed in the form of a magnetic body such as a magnet mounted on the lower surface of the interface so that the coils are arranged in an appropriate manner due to mutual attractive force with other magnetic bodies mounted inside the electronic apparatus 200 You can also guide.

Meanwhile, the wireless power transmission apparatus 100 may be formed to include one or more transmission coils. The wireless power transmission apparatus 100 may selectively increase the power transmission efficiency by selectively using a part of the coils appropriately arranged with the reception coil 2911a of the electronic device 200 among the one or more transmission coils. The wireless power transmission apparatus 100 including the one or more transmission coils will be described below with reference to Fig.

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 showing a part of the configuration of the electromagnetic induction type wireless power transmission device 100 and the electronic device 200 that can be employed in the embodiments disclosed herein. The configuration of the power transfer unit 110 included in the wireless power transmission apparatus 100 will be described with reference to FIG. 4A. Referring to FIG. 4B, The configuration of the power supply unit 290 will be described.

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

As described above, the transmission coil 1111a forms a magnetic field corresponding to a radio power signal in accordance with a change in current. The transmission coil 1111a may be implemented as 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. An alternating current deformed by the inverter 1112 is formed in the transmission coil 1111a by driving a resonant circuit including the transmission coil 1111a and a capacitor (not shown) .

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

The positioning unit 1114 may move or rotate the transmission coil 1111a to increase the efficiency of the wireless power transmission by the inductive coupling scheme. 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 reception coil (Rx coil) 2911a and a rectification circuit 2913.

A current is induced in the reception coil 2911a by a change in the magnetic field formed from the transmission coil 1111a. The receiving coil 2911a may be in the form of a flat spiral or 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 enhance reception efficiency of the 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 rectifying circuit 2913 performs full-wave rectification on the current to convert the alternating current into direct current. The rectifier circuit 2913 may be implemented by, for example, a full bridge rectifier circuit including four diodes or a circuit using active components.

In addition, the rectifying circuit 2913 may further include a regulator for converting the rectified current into a more flat and stable direct current. The output power of the rectifying circuit 2913 is supplied to the respective components of the power supply unit 290. The rectifying circuit 2913 is a DC-DC converter that 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 similar to the charging unit 298) (DC-DC converter).

The modulation and demodulation unit 293 may be constituted by a resistive element connected to the power receiving unit 291 and having a resistance varying with respect to a direct current and a capacitive element whose reactance is changed with respect to an alternating current . The power receiving control unit 292 may modulate the wireless power signal received by the power receiving unit 291 by changing the resistance or reactance of the modem 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.

5 is a block diagram of a wireless power transmission apparatus configured to have one or more transmission coils that receive power in accordance with an inductive coupling scheme employable 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 transmission coils 1111a-1 to 1111a-n may be an array of partly overlapping primary coils. An active area may be determined by a portion of the one or more transmission coils.

The one or more transmission coils 1111a-1 to 1111a-n may be mounted below the interface surface. The power conversion unit 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) provided in the wireless power transmission device 100 . As another example, the power transmission control unit 112 may use the one or more transmission coils 1111a-1 to 1111a-n to generate a power control message indicating the strength of the wireless power signal from an object on the interface surface, The position information of the electronic device 200 may be obtained by receiving a power control message indicating identification information of the object and determining which coil of the one or more transmission coils is close to the position 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 . At this time, a single transmission coil or a combination of one or more transmission coils for 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.

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

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 showing a wireless power transmission apparatus including a further configuration in addition to the configuration shown in Fig. 2 (a).

6, the wireless power transmission apparatus 100 includes a power transmission unit 110 and a power supply unit 190 that support at least one of the inductive coupling method and the resonant coupling method described above, And may further include a sensor unit 120, a communication unit 130, an output unit 140, a memory 150, and a control unit 180.

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 control unit 180 may be realized as a separate module from the power transmission control unit 112 in the power conversion unit 110 described with reference to FIG. 2, or may be implemented as a single module.

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 transmission by the inductive coupling method, the sensor unit 120 may operate as a position sensing unit, and the position information sensed by the sensor unit 120 may be transmitted to the power conversion unit 110 to move or rotate the transmission coil 1111a.

Further, for example, the wireless power transmission apparatus 100 including one or more of the above-described transmission coils may receive the position information of the electronic apparatus 200 from among the one or more transmission coils It is possible to determine coils that can be placed in an inductive or resonant 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 wire / wireless data communication with the electronic device 200. The communication unit 130 may include electronic components for at least one 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 in order to perform data communication with the electronic device 200. The connection information may be required 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 connection 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 control unit 180 may receive the connection information necessary for establishing a connection with the electronic device 200 through a power control message included in the wireless power signal modulated by the electronic device 200. [ The control unit 180 may establish a connection for data communication with the electronic device 200 based on the received connection information.

For example, when the communication unit 130 performs communication using the Bluetooth ^TM method, the access information may correspond to a Bluetooth ^TM address. In this case, the controller 180 may control the communication unit 130 to acquire the Bluetooth ^TM address through the power control message and perform device pairing with the electronic device 200. Then, the control unit 180 may establish a connection to transmit / receive user data to / from the electronic device 200.

For example, when the communication unit 130 performs communication using a wireless LAN, the access information includes at least one of a service set identifier (SSID), wired equivalent privacy (WEP), or Wi-Fi protected access Address, and so on. In this case, the controller 180 may control the communication unit 130 to acquire the access information through the power control message and perform authentication or connection with the electronic device 200. Then, the control unit 180 may establish a connection to transmit / receive user data to / from the electronic device 200.

If the connection is not established and connection information is required for establishing the connection, the controller 180 determines whether or not the connection with the electronic device 200 is established, (200) to transmit the access information. The controller 180 may request to transmit the access information through the wireless power signal. For example, the control unit 180 may request the electronic device 200 to transmit the connection information by controlling the power conversion unit 111 to generate a wireless power signal by applying a specific frequency, amplitude, voltage, or current. have. The electronic device 200 may sense the wireless power signal requesting transmission of the connection information and transmit the connection information by modulating the wireless power signal to include the connection information.

Meanwhile, the communication unit 130 may be in a standby state or disabled to save power. The control unit 180 may determine whether the communication unit 130 is activated when the electronic device 200 is detected using the power transmission unit 110. [ The control unit 180 may control the communication unit 130 to activate the communication unit 130 if the communication unit 130 is not activated.

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 transmission apparatus according to the embodiments disclosed herein may be applied to devices such as a docking station, a cradle device, and other electronic devices, May be readily apparent to those skilled in the art.

FIG. 7 shows a configuration in which 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 the power supply unit 290 shown in FIG. 2, FIG. 4, or FIG.

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, and 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 be a server for generating and transmitting broadcast signals and / or broadcast-related information, or a server for receiving broadcast signals and / or broadcast-related information generated by the broadcast center and transmitting the generated broadcast signals and / or broadcast- related information. 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, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) 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 adapted to other broadcasting systems as well as the digital broadcasting system described above.

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. WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) and the like can be used as wireless Internet technologies.

The short range communication module 214 is a module for short range communication. Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, etc. can be used as a short range communication technology. Meanwhile, USB (Universal Serial Bus), IEEE 1394, Intel Thunderbolt, or the like can be used as a wired LAN.

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 position information module 215 is a module for acquiring the position of the terminal, for example, a Global Position System (GPS) module.

Referring to FIG. 7, an A / V (Audio / Video) 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 moving image obtained by the image sensor in the video communication mode or the 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 may be transmitted to the outside via 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 a 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 include two or more sensors according to the configuration.

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 sense azimuth, pitch and roll angles based on axes in three directions.

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, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the terminal 200 is in the video communication mode or the photographing mode, the photographed and / or received image, UI, or GUI is displayed.

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 can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display unit 251 may also be of a light transmission type. 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 transmits the corresponding data to the control unit 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 type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type 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 recognizing that the pointer is positioned on the touch screen while the pointer is not in contact with the touch screen is referred to as "proximity touch & The act of actually touching the pointer on the screen is called "contact touch. &Quot; 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 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) 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 that occur in the terminal include call signal reception, message reception, key signal input, touch input, and the like. 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 . The various command signals input from the cradle or the power source may be operated as a signal 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. Also, the controller 180 may be implemented as a separate module from the power receiving controller 292 in the power supply unit 290 described with reference to FIG. 2, or may be implemented as a single module.

The control unit 280 may perform pattern recognition processing to recognize handwriting input or drawing input performed on the touch screen as characters and images, respectively.

Meanwhile, the wireless Internet module 213 or the local area communication module 214 may be in a standby state or disabled to save power. The control unit 280 may determine whether the wireless Internet module 213 or the local area communication module 214 is activated after the wireless power signal is received by the power receiving unit 291. [ If the wireless Internet module 213 or the local area communication module 214 is not activated, the controller 280 controls the wireless Internet module 213 or the local area communication module 214 to be activated .

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 operation by the power reception control unit 292 may be performed by the control unit 280 ) Can be understood as being performed.

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 wirelessly charging 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 the present invention.

FIG. 8 shows an example in which the mobile terminal shown in FIG. 7 is charged in an electromagnetic induction manner by the wireless power transmission apparatus 100. FIG.

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

9 shows an example of combining a coil for wireless power transmission and reception and a coil for short-range communication according to the first embodiment of the present invention.

As can be seen from FIG. 9, in order to miniaturize the coils for wireless power transmission and reception and the coils for short-range communication such as NFC (Near Field Communication), the first embodiment of the present invention is formed by forming one coil An example is shown.

As can be seen from Fig. 9, a coil 2911a and a magnetic shield member 2917 are shown.

The coil is planar, and the winding is wound clockwise or counterclockwise. One end (b) of the winding may protrude along the lower surface or the upper surface of the planar coil from the inside to the outside of the plane so as to be parallel to the other end (a) of the coil. That is, one end (b) of the winding is disposed to protrude along the upper surface or the lower surface of the planar coil from the inside to the outside of the planar coil so as to be parallel to the other end (a) of the coil. That is, the coil is disposed above the upper surface of the planar coil or below the lower surface so that one end of the coil wound inside is again pulled outward.

One point of the windings may be arranged to be in line with the other end of the windings by extending in a single line.

One end (b) and the other end (a) of the winding are used as antennas for wireless transmission and reception of power, and one end (b) of the coil and the extended single wire (c) have. The length of the extended disconnection can be adjusted in accordance with the short-range wireless communication method to be used. That is, the length of the extended disconnection can be adjusted by changing the point at which the coil extends in the coil.

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

On the other hand, the magnetic shield member 2917 contacts the planar coil to block leakage current.

At this time, the thickness of the magnetic shielding member 2917 is about 0.8 mm, and the thickness of the coil 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 coil. Therefore, the total thickness of the coil 2911a and the magnetic shield member 2917 may be about 1.4 mm, for example.

However, considering that the total thickness of the mobile terminal is made within 10 mm, it is necessary to further reduce the thickness.

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

FIG. 10 is a view showing an example of eddy current phenomenon caused by an electromagnetic induction method, and FIG. 11 shows an effect of an eddy current on a radio power transmission.

As can be seen from FIG. 10, when the magnetic field is close to the conductor, an induced current is generated in the conductor due to the change of the magnetic field. This is called eddy current.

Such an eddy current is an unintentional current flow that causes an abnormal signal flow to the normal signal flow or causes a phenomenon of signal deterioration.

11, when the thickness of the magnetic shield member 2917 is not sufficient or the performance is not satisfactory, the magnetic field is leaked without being blocked by the magnetic shield member 2917, An eddy current is generated up to the material 1915, e.g., the circuit board.

Therefore, reducing the thickness of the magnetic shield member for miniaturization may cause a disadvantage that the leakage magnetic field greatly increases, and the efficiency is greatly reduced. In addition, it may cause a disadvantage that an eddy current is caused largely.

Accordingly, a method for miniaturizing a coil for wireless power transmission and reception and a coil for close-range communication, for example, NFC (Near Field Communication), to such an extent that it can be mounted on a small electronic apparatus without reducing the thickness of the magnetic shield member, This will be described with reference to Fig.

12 and 13 show an example of combining a coil for short-range communication and a coil for wireless power transmission / reception according to a second embodiment of the present invention.

12 and 13, the coil 2911a is bonded to the magnetic shield member 2917 by the adhesive member 2917. [

The coil 2911a is planar, and the winding is wound clockwise or counterclockwise.

The planar coil 2911a is formed by winding a winding in a clockwise or counterclockwise direction. The planar coil 2911a may be circular, oval or rectangular. The winding of the winding is formed such that an empty area is formed in the planar coil 2911a. At this time, the internal empty area may be circular, elliptical, or square, as described above.

One end (b) of the winding may protrude along the lower surface of the planar coil 2911a from the inside to the outside of the plane so as to be parallel to the other end (a) of the coil. That is, one end (b) of the winding is arranged to protrude along the lower surface of the planar coil 2911a from the inside to the outside of the planar coil 2911a in parallel with the other end (a) of the coil. That is, the coil is disposed below the lower surface of the planar coil so that one end of the coil wound inside is again pulled out to the outside.

One point of the windings may be arranged in a single line so as to be parallel to the other end (b) of the windings.

One end (b) and the other end (a) of the winding are used as antennas for wireless transmission and reception of power, and one end (b) of the coil and the extended single wire (c) have. The length of the extended disconnection can be adjusted in accordance with the short-range wireless communication method to be used. That is, the length of the extended disconnection can be adjusted by changing the point at which the coil extends in the coil.

On the upper surface of the shielding member 2917, grooves are formed to receive protrusions of one end of the winding so that the flat coil is completely in contact with the flat coil. One end (b) and the other end (a) of the winding are guided to the outside of the magnetic shielding member 2917 along the groove, and one end and the other end of the winding guided to the outside are connected to the inverter 1112 are connected to the rectifying circuit 2913.

The depth of the groove may be greater than the thickness of the winding, for example, 0.3 mm. The width of the groove may be larger than the spaced distance so that the one end and the other end of the coil are accommodated in a state where the one end and the other end of the coil are spaced apart from each other by a predetermined distance. Alternatively, the width of the groove may be formed corresponding to the thickness of the winding so as to accommodate only one end of the winding. In this case, since the other end of the winding is spaced apart from the one end of the winding by a certain distance, it can be brought into contact with the upper surface of the magnetic shield member 2917 without being guided by the groove.

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

As described above, in the second embodiment, when the thickness of the magnetic shield member 2917 is about 0.8 mm, and the thickness of the coil of the planar coil is about 0.3 mm, The total thickness of the coil 2911a and the magnetic shielding member 2917 can be reduced to, for example, about 1.1 mm because the magnetic shielding member 2917 is accommodated by the groove of the magnetic shielding member 2917.

Figs. 14 and 15 show an example in which coils for wireless power transmission and reception and coils 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 planar, and the winding is wound clockwise or counterclockwise. The induction current may flow through the first coil due to a change in external magnetic field. The winding of the first coil 2911a-1 is formed in a clockwise or counterclockwise direction so as to form an empty space, and one end of the winding is arranged outside the plane from the inside to the outside May be protruded along the lower surface of the planar coil. The planar coil 2911a may be circular, oval or rectangular. At this time, the internal empty area may be circular, elliptical, or square, as described above.

The second coil 2911a-2 for short-range communication is formed so that a winding is formed along the outer circumferential surface of the planar coil, and is spaced apart from the outer circumferential surface of the coil. By the winding, the second coil 2911a-2 has a strip-shaped antenna shape.

14 and 15, a groove for receiving the first coil and a groove for receiving the second coil may be formed on the 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 corresponding to the area of the first coil and a groove corresponding to the area of the second coil may be additionally formed on the upper surface of the shielding member 2917.

The step formed as described above 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 are protruded by a protrusion between a groove for receiving the first coil 2911a-1 and a groove for receiving the second coil 2911a-2, Can be electrically isolated.

The area of the step (i.e., groove) formed on the upper surface of the shielding member 2917 to accommodate the first coil is larger than the area of the first coil 2911a-1 except for the center empty space of the first coil 2911a-1. -1). ≪ / RTI > That is, the upper surface of the magnetic shielding member 2917 is formed with a groove only in a portion corresponding to the actual area of the first coil 2911a-1 except for the empty space. Accordingly, the central portion of the magnetic shielding member 2917 corresponding to the empty space has a protruding surface higher than the height of the groove, the protruding surface prevents the coil from being detached, and the magnetic flux density is increased .

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

16 and 17 show an example of combining a coil for wireless power transmission and reception and a coil for short-range communication according to a fourth embodiment of the present invention.

The second coil 2911a-2 for short-range communication is formed so that a winding is formed along the inner circumferential surface of the planar coil and is spaced apart from the inner circumferential surface of the coil. By the winding, the second coil 2911a-2 has a strip-shaped antenna shape.

16 and 17 are similar to the description of the configurations of Figs. 14 and 15, and therefore, the above description will be applied mutatis mutandis.

The scope of protection of the present invention described above is not limited to the embodiments disclosed in the present specification, but the present invention can be modified, changed, or improved in various forms within the scope of the present invention and claims.

Claims (10)

1. An electronic device capable of wireless power transmission / reception and short-
A planar coil in which a winding is formed by winding in a clockwise or counterclockwise direction,
Wherein one end of the winding is disposed so as to protrude along the lower surface of the planar coil from the inner side to the outer side of the plane so as to be parallel to the other end of the winding and one end of the winding and the other end of the winding Wherein one end of the winding extends in a single line outside the plane and is disposed in parallel with the other end of the winding;
And a shielding member in contact with the planar coil for blocking the leakage magnetic field,
Here, the closed line in one of the planar coils formed by one end and the other end of the coil is used as an antenna for wireless transmission / reception of power, and the one of the planar coils formed by the one end of the coil and the extended disconnection The other closed lines in the mobile station are used as antennas for short-range wireless communication,
Wherein a top surface of the shielding member is formed with a groove for accommodating one end of the winding and the protrusion of the other end of the winding extending from the inside to the outside so as to make the flat coil completely in contact,
Wherein the extended single wire is not accommodated in the groove but is in contact with the upper surface of the shielding member. The method according to claim 1,
Wherein the length of the extended disconnection is adjusted by changing a point at which the disconnection extends in the planar coil according to a scheme of the short-range wireless communication. The method according to claim 1,
Wherein an upper surface of the shielding member is formed with a step corresponding to an area of the planar coil. The method according to claim 1,
Wherein the coil is wound such that a central portion of the coil forms an empty space. 5. The method of claim 4,
Wherein an upper surface of the shielding member has a protruding surface having an area corresponding to the empty space for preventing the flat coil from being detached. delete delete delete delete delete

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