KR20180097250A - Multi coil module and wireless power receiver - Google Patents

Abstract

A wireless power receiver according to an embodiment of the present invention comprises: a printed circuit board; a first coil for short-range communication, disposed on the printed circuit board and disposed outside a first coil; a second coil for short-range communication, disposed on the printed circuit board and disposed outside a second coil; a third coil for wirelessly receiving power, disposed on the printed circuit board; a rectifier for converting AC power received from the third coil to DC power; a converter for converting the converted DC power to a specific intensity; and a shielding block disposed between the first coil and the second coil or between the second coil and the third coil. Therefore, the wireless power receiver can maximize wireless charging efficiency and wireless communication efficiency.

Description

[0001] MULTI COIL MODULE AND WIRELESS POWER RECEIVER [0002]

The present invention relates to a multi-coil module and a wireless power receiver.

Portable terminals, such as mobile phones and laptops, include a battery for storing power and a circuit for charging and discharging the battery. In order for the battery of such a terminal to be charged, power must be supplied from an external charger.

2. Description of the Related Art [0002] Generally, as an example of an electrical connection between a charging device and a battery for charging electric power of a battery, a commercial electric power is supplied to a terminal for converting electric power into voltage and current corresponding to the battery, Supply method. This type of terminal supply is accompanied by the use of physical cables or wires. Therefore, when handling a lot of terminal-supplied equipment, many cables occupy considerable work space, are difficult to organize, and are not well apparent. Also, the terminal supply method may cause problems such as instantaneous discharge due to different potential difference between terminals, burnout due to foreign substances, fire, natural discharge, battery life and deterioration of performance.

In order to solve such a problem, a charging system (hereinafter referred to as a "wireless charging system") and a control method using a method of transmitting power wirelessly are proposed. In addition, since the wireless charging system has not been installed in some portable terminals in the past and the consumer has to purchase a separate wireless charging receiver accessory, the demand for the wireless charging system is low, but the wireless charging user is expected to increase rapidly. Wireless charging function is expected to be equipped basically.

Generally, a wireless charging system comprises a wireless power transmitter for supplying electric energy in a wireless power transmission mode and a wireless power receiver for receiving electric energy supplied from a wireless power transmitter to charge the battery.

Such a wireless charging system may transmit power by at least one wireless power transmission scheme (e.g., electromagnetic induction scheme, electromagnetic resonance scheme, RF wireless power transmission scheme, etc.).

For example, the wireless power transmission scheme may be based on a variety of wireless power transmission standards based on an electromagnetic induction scheme in which a magnetic field is generated in a power transmitter coil and charged using an electromagnetic induction principle in which electricity is induced in a receiver coil under the influence of its magnetic field . Here, the electromagnetic induction type wireless power transmission standard may include an electromagnetic induction wireless charging technique defined in a Wireless Power Consortium (WPC) or a Power Matters Alliance (PMA).

In another example, the wireless power transmission scheme may employ an electromagnetic resonance scheme in which the magnetic field generated by the transmission coil of the wireless power transmitter is tuned to a specific resonance frequency to transmit power to a nearby wireless power receiver . Here, the electromagnetic resonance method may include a resonance-type wireless charging technique defined in the Alliance for Wireless Power (A4WP) standard mechanism, a wireless charging technology standard mechanism.

In another example, a wireless power transmission scheme may use an RF wireless power transmission scheme that transmits power to a wireless power receiver located at a remote location by applying low-power energy to the RF signal.

It is an object of the present invention to provide a wireless power receiver including a multi-coil module and the multi-coil module.

Another object of the present invention is to provide a multi-coil module capable of maximizing the wireless charging efficiency and the radio communication efficiency by minimizing the interference phenomenon between a plurality of coils and a wireless power receiver including the multi-coil module.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

A wireless power receiver according to an embodiment includes: a printed circuit board; A first coil disposed on the printed circuit board and disposed outside the first coil, the first coil for short-range communication; A second coil disposed on the printed circuit board, disposed outside the second coil, for a short distance communication; A third coil disposed on the printed circuit board for receiving power wirelessly; A rectifier for converting AC power received from the third coil to DC power; A converter for converting the converted DC power to a specific intensity; And a shielding block disposed between the first coil and the second coil or between the second coil and the third coil.

Effects of the method and apparatus according to the present invention will be described as follows.

The present invention has the advantage of providing a multi-coil module.

It is another advantage of the present invention to provide a multi-coil module capable of maximizing wireless charging efficiency and radio communication efficiency by minimizing interference between a plurality of coils or antennas.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. It is to be understood, however, that the technical features of the present invention are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment.
1 is a block diagram illustrating a wireless charging system according to an embodiment.
2 is a block diagram illustrating a structure of a wireless power receiver according to an embodiment.
3 is a coil arrangement structure of an electronic device according to an embodiment.
Fig. 4 is an arrangement structure of a coil and a shielding block of an electronic device according to an embodiment.
Fig. 5 is an arrangement structure of a coil and a shielding block of an electronic device according to another embodiment.
6 is a cross-sectional view of a plurality of coils and shielding blocks in yet another embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and various methods to which the embodiments are applied will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

The present invention is not necessarily limited to these embodiments, as long as all of the constituent elements of the embodiment are described as being combined or operated together. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. In addition, although all of the components may be implemented as one independent hardware, some or all of the components may be selectively combined to perform a part or all of the functions in one or a plurality of hardware. As shown in FIG. The codes and code segments constituting the computer program may be easily deduced by those skilled in the art. Such a computer program may be stored in a computer-readable storage medium, readable and executed by a computer, thereby realizing embodiments. As the storage medium of the computer program, a magnetic recording medium, an optical recording medium, a carrier wave medium, or the like may be included.

In the description of the embodiment, in the case of being described as being formed on the "upper or lower", "before" or "after" of each component, (Below "and " front or rear") encompass both that the two components are in direct contact with each other or that one or more other components are disposed between the two components.

It is also to be understood that the terms such as " comprises, "" comprising," or "having ", as used herein, mean that a component can be implanted unless specifically stated to the contrary. But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meaning of the relevant art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected to or connected to the other component, It should be understood that an element may be "connected," "coupled," or "connected."

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

In the description of the embodiments, an apparatus for transmitting wireless power on a wireless power charging system includes a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a transmitter, a transmitter, a transmitter, , A wireless power transmission device, a wireless power transmitter, a wireless charging device, and the like. For the sake of convenience, a wireless power receiving device, a wireless power receiving device, a wireless power receiving device, a wireless power receiving device, a receiving terminal, a receiving side, a receiving device, a receiver Terminals and the like can be used in combination.

The wireless charging device according to the embodiment may be configured as a pad type, a cradle type, an access point (AP) type, a small base type, a stand type, a ceiling embedded type, a wall type, Power may be transmitted to the device.

As an example, a wireless power transmitter can be used not only on a desk or on a table, but also developed for automobiles and used in a vehicle. A wireless power transmitter installed in a vehicle can be provided in a form of a stand that can be easily and stably fixed and mounted.

A mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), a navigation device, an MP3 player, The present invention can be applied to a portable device such as a toothbrush, an electronic tag, a lighting device, a remote control, a fishing rod, and the like. However, the present invention is not limited thereto. May be used interchangeably. A wireless power receiver according to another embodiment may also be mounted on a vehicle, an unmanned aerial vehicle, an air drone or the like.

A wireless power receiver according to an embodiment may include at least one wireless power transmission scheme and may receive wireless power from two or more wireless power transmitters at the same time. Here, the wireless power transmission scheme may include at least one of the electromagnetic induction scheme, the electromagnetic resonance scheme, and the RF wireless power transmission scheme. In particular, the wireless power receiving means for supporting the electromagnetic induction method may include an electromagnetic induction type wireless charging technique defined by the Wireless Power Consortium (WPC) and the AirFuel Alliance (formerly PMA, Power Matters Alliance) have. In addition, the wireless power receiving means for supporting the electromagnetic resonance method may include a resonance type wireless charging technique defined in the AirFuel Alliance (formerly Alliance for Wireless Power) standard mechanism, a wireless charging technology standard organization.

Generally, a wireless power transmitter and a wireless power receiver that constitute a wireless power system can exchange control signals or information through in-band communication or Bluetooth low energy (BLE) communication. Here, the in-band communication and the BLE communication can be performed by a pulse width modulation method, a frequency modulation method, a phase modulation method, an amplitude modulation method, an amplitude and phase modulation method, and the like. For example, the wireless power receiver can transmit various control signals and information to the wireless power transmitter by generating a feedback signal by switching on / off the current induced through the reception coil in a predetermined pattern. The information transmitted by the wireless power receiver may include various status information including received power intensity information. At this time, the wireless power transmitter can calculate the charging efficiency or the power transmission efficiency based on the received power intensity information.

1 is a block diagram illustrating a wireless charging system according to an embodiment.

Referring to FIG. 1, the wireless charging system includes a wireless power transmission terminal 10 for wirelessly transmitting power, a wireless power receiving terminal 20 for receiving the transmitted power, and an electronic device 30 Lt; / RTI >

For example, the wireless power transmitting terminal 10 and the wireless power receiving terminal 20 can perform in-band communication in which information is exchanged using the same frequency band as that used for wireless power transmission. In another example, the wireless power transmitting terminal 10 and the wireless power receiving terminal 20 perform out-of-band communication in which information is exchanged using a different frequency band different from the operating frequency used for wireless power transmission .

For example, information exchanged between the wireless power transmitting terminal 10 and the wireless power receiving terminal 20 may include control information as well as status information of each other. Here, the status information and the control information exchanged between the transmitting and receiving end will become more apparent through the description of the embodiments to be described later.

The in-band communication and the out-of-band communication may provide bidirectional communication, but the present invention is not limited thereto. In another embodiment, the in-band communication and the out-of-band communication may be provided.

 For example, the unidirectional communication may be that the wireless power receiving terminal 20 transmits information only to the wireless power transmitting terminal 10, but the present invention is not limited thereto, and the wireless power transmitting terminal 10 may transmit information Lt; / RTI >

In the half duplex communication mode, bidirectional communication is possible between the wireless power receiving terminal 20 and the wireless power transmitting terminal 10, but information can be transmitted only by any one device at any time.

The wireless power receiving terminal 20 according to an exemplary embodiment may acquire various status information of the electronic device 30. [ For example, the status information of the electronic device 30 may include current power usage information, information for identifying a running application, CPU usage information, battery charge status information, battery output voltage / current information, And is information obtainable from the electronic device 30 and available for wireless power control.

In particular, the wireless power transmitting terminal 10 according to an exemplary embodiment may transmit a predetermined packet indicating whether or not to support fast charging to the wireless power receiving terminal 20. The wireless power receiving terminal 20 can inform the electronic device 30 of the connected wireless power transmitting terminal 10 when it is confirmed that it supports the fast charging mode. The electronic device 30 may indicate that fast charging is possible through a predetermined display means, which may be, for example, a liquid crystal display.

Also, the user of the electronic device 30 may select the predetermined fast charge request button displayed on the display means to control the wireless power transmitting terminal 10 to operate in the fast charge mode. In this case, the electronic device 30 can transmit a predetermined fast charge request signal to the wireless power receiving terminal 20 when the quick charge request button is selected by the user. The wireless power receiving terminal 20 may generate a charging mode packet corresponding to the received fast charging request signal and transmit the same to the wireless power transmitting terminal 10 to switch the general low power charging mode to the fast charging mode.

According to one embodiment, the electronic device 30 can be operated and switched to the fast charge mode automatically according to the communication and negotiation results of the wireless power transmitter 10 and the wireless power receiver 20, . The electronic device 30 can also be operated and switched to a general low power mode automatically according to the result of communication and negotiation between the wireless power transmitter 10 and the wireless power receiver 20 without the user's request or input.

2 is a block diagram illustrating a structure of a wireless power receiver according to an embodiment.

2, the wireless power receiver 200 includes a receiving coil 210, a rectifier 220, a DC / DC converter 230, a load 240, a sensing unit 250, 260, and a main control unit 270. Here, the communication unit 260 may include at least one of a demodulation unit 261 and a modulation unit 262.

Although the wireless power receiver 200 shown in the example of FIG. 2 is shown as being capable of exchanging information with a wireless power transmitter (not shown) via in-band communication, this is only one embodiment, The communication unit 260 according to an exemplary embodiment may provide short-range bidirectional communication through a frequency band different from the frequency band used for wireless power signal transmission.

AC power received through the receive coil 210 may be delivered to the rectifier 220. The rectifier 220 may convert the AC power to DC power and transmit it to the DC / DC converter 230. The DC / DC converter 230 may convert the intensity of the rectifier output DC power to a specific intensity required by the load 240 and then deliver it to the load 240. Also, the receiving coil 210 may include a plurality of receiving coils (not shown), i.e., first through n-th receiving coils. The frequency of the AC power transmitted to each of the reception coils (not shown) according to an embodiment may be different from each other, and another embodiment may include a predetermined frequency controller having a function of adjusting LC resonance characteristics for different reception coils The resonance frequencies of the respective receiving coils can be set differently.

The sensing unit 250 may measure the intensity of the DC power output from the rectifier 220 and may provide the measured DC power to the main control unit 270. Also, the sensing unit 250 may measure the intensity of the current applied to the receiving coil 210 according to the wireless power reception, and may transmit the measurement result to the main control unit 270. The sensing unit 250 may measure the internal temperature of the wireless power receiver 200 and provide the measured temperature value to the main control unit 270.

For example, the main control unit 270 may compare the measured rectifier output DC power with a predetermined reference value to determine whether an overvoltage is generated. As a result of the determination, if an overvoltage is generated, a predetermined packet indicating that an overvoltage has occurred can be generated and transmitted to the modulator 262. Here, the signal modulated by the modulating unit 262 may be transmitted to the wireless power transmitter through the receiving coil 210 or a separate coil (not shown). The main control unit 270 may determine that the detection signal is received when the intensity of the rectifier output DC power is equal to or greater than a predetermined reference value and when the signal strength indicator corresponding to the detection signal is received by the modulation unit 262 To be transmitted to the wireless power transmitter. The demodulation unit 261 demodulates the AC power signal between the reception coil 210 and the rectifier 220 or the DC power signal output from the rectifier 220 to identify whether or not the detection signal is received, (270). ≪ / RTI > At this time, the main control unit 270 may control the signal intensity indicator corresponding to the detection signal to be transmitted through the modulation unit 262. [

In addition, the main control unit 270 may determine whether the connected wireless power transmitter is a wireless power transmitter capable of fast charging based on the information demodulated by the demodulator 260. [

Also, when a predetermined fast charge request signal for requesting fast charging is received from the electronic device 30 of FIG. 1, the main control unit 270 generates a charge mode packet corresponding to the received fast charge request signal, (261). Here, the fast charge request signal from the electronic device can be received according to the user menu selection on the predetermined user interface.

In addition, when it is confirmed that the connected wireless power transmitter supports the fast charging mode, the main controller 270 automatically requests the wireless power transmitter to fast charge based on the battery remaining amount or the wireless power transmitter stops the fast charging It may be controlled to switch to a general low-power charging mode.

In addition, the main control unit 270 may monitor the power consumption of the electric device during charging to the general low-power charging mode in real time. If the power consumption of the electronic apparatus is equal to or greater than a predetermined reference value, the main control unit 270 may generate a predetermined charging mode packet requesting switching to the fast charging mode and transmit the packet to the modulation unit 261. [

Also, the main control unit 270 may compare the internal temperature measured by the sensing unit 250 with a predetermined reference value to determine whether overheating occurs. If overheating occurs during the fast charging, the main control unit 270 may generate and transmit the charging mode packet so that the wireless power transmitter switches to the general low power charging mode.

The main control unit 270 determines whether the charge mode needs to be changed based on at least one of the battery charge rate, the internal temperature, the intensity of the rectifier output voltage, the CPU usage rate mounted on the electronic device, and the user menu selection, As a result of the determination, if it is necessary to change the charging mode, a charging mode packet including the charging mode value to be changed may be generated and transmitted to the wireless power transmitter.

3 is a coil arrangement structure of an electronic device according to an embodiment.

3, the electronic device 300 according to the embodiment may include a printed circuit board 301, a first coil 303, a second coil 305, and a third coil 307 . The electronic device 300 according to an embodiment may be a multi-coil module or a wireless power receiver including the multi-coil module.

The electronic device 300 may further include a shielding sheet (not shown). For example, the shielding sheet may be disposed on the printed circuit board 301 and the first to third coils 303 to 307, or may be disposed below the printed circuit board 301. The shielding sheet may have the same area as the printed circuit board 301. The shielding sheet may shield the magnetic field generated by the first to third coils 303 to 307. For example, the shielding sheet may shield the magnetic field so that the magnetic field does not affect various electronic circuits (not shown) disposed on the printed circuit board 301.

The first coil 303 according to the embodiment may be a coil for near field communication (NFC). For example, the electronic device 300 may transmit and receive a short-range communication signal with another electronic device (not shown) via the first coil 303.

The second coil 305 according to the embodiment may be a coil for a magnetic secure transmission (MST). The magnetic security transmission means a method of transmitting magnetic credit card information by wireless transmission. For example, the electronic device 300 may transmit credit card information stored in the electronic device 300 to the credit card payment terminal (not shown) via the second coil 305.

The third coil 307 according to the embodiment may be a wireless charging coil. For example, the electronic device 300 may transmit and receive wireless power through the third coil 307.

The first coil 303 according to the embodiment may be disposed at a predetermined distance from the outline of the printed circuit board 301. That is, the first coil 303 may be spaced apart from the outline of the printed circuit board 301 by a predetermined first spacing space 302.

The second coil 305 may be spaced apart from the inner boundary of the first coil 303 by a predetermined distance. That is, the second coil 305 may be spaced apart from the inner boundary of the first coil 303 by a predetermined second spacing space 304.

The third coil 307 may be spaced apart from the inner boundary of the second coil 305 by a predetermined distance. That is, the third coil 307 may be spaced apart from the inner boundary of the second coil 305 by a predetermined third spacing space 306.

Fig. 4 is an arrangement structure of a coil and a shielding block of an electronic device according to an embodiment.

4, the electronic device 400 according to the embodiment may include a printed circuit board 401, a first coil 403, a second coil 405, and a third coil 407 . The electronic device 400 according to an embodiment may be a multi-coil module or a wireless power receiver including the multi-coil module.

The electronic device 400 according to the embodiment may further include a shielding sheet (not shown). For example, the shielding sheet may be disposed on the printed circuit board 401 and the first to third coils 403, 405, and 407, or may be disposed below the printed circuit board 301 . The shielding sheet may have the same area as the printed circuit board 401. The shielding sheet may shield the magnetic fields generated by the first to third coils 403, 405, and 407. For example, the shielding sheet may shield the magnetic field so that the magnetic field does not affect various electronic circuits (not shown) disposed on the printed circuit board 401.

The first coil 403 according to the embodiment may be a coil for near field communication (NFC). For example, the electronic device 400 may transmit and receive a short-range communication signal with another electronic device (not shown) through the first coil 403.

The second coil 405 according to the embodiment may be a coil for magnetic secure transmission (MST). The magnetic security transmission means a method of transmitting magnetic credit card information by wireless transmission. For example, the electronic device 400 may transmit credit card information stored in the electronic device 400 to the credit card payment terminal (not shown) via the second coil 405.

The third coil 407 according to the embodiment may be a wireless charging coil. For example, the electronic device 400 may transmit and receive wireless power through the third coil 407.

The first coil 403 may be spaced apart from the outline of the printed circuit board 401 by a predetermined distance. That is, the first coil 403 may be spaced apart from the outline of the printed circuit board 401 by a predetermined first spacing space 402.

The second coil 405 may be spaced apart from the inner boundary of the first coil 403 by a predetermined distance. That is, the second coil 405 may be spaced apart from the inner boundary of the first coil 403 by a predetermined second spacing space 404.

The third coil 407 may be spaced apart from the inner boundary of the second coil 405 by a predetermined distance. That is, the third coil 407 may be spaced apart from the inner boundary of the second coil 405 by a predetermined third spacing space 406.

The electronic device 400 according to an embodiment may include at least one shielding block. The shielding block may be referred to as a dummy block. The dummy block may be manufactured in various shapes. For example, the dummy block may be formed of a triangular block having a sharp top, an inverted triangular block having a sharp bottom, a rectangular block, or the like.

The dummy block according to the embodiment may be part of the printed circuit board 401. That is, the dummy block may be included in the printed circuit board 401. For example, the printed circuit board 401 may be manufactured to include the dummy block.

The dummy block according to another embodiment may be part of the shielding sheet. That is, the dummy block may be included in the shielding sheet. For example, the shielding sheet may be manufactured to include the dummy block.

The dummy block according to another embodiment may be a separate metal or plastic material from the printed circuit board 401 or the shielding sheet. For example, the dummy block may be a metal or plastic material to which no current is applied. The dummy block may be disposed through pattern printing on the printed circuit board 401 or the shielding sheet. For example, the dummy block may be pattern-printed simultaneously when the first to third coils 403, 405, and 407 are pattern-printed on the printed circuit board 401 or the shielding sheet. That is, since the dummy block can be formed simultaneously with the coils, an additional process may not be added. That is, the dummy block can be produced without additional process cost.

The electronic device 400 according to the embodiment may include first through eighth dummy blocks 408 through 415. The first to fourth dummy blocks 408 to 411 according to the embodiment may be disposed in the second spacing space 404 on the printed circuit board 401.

For example, the first dummy block 408 may be disposed between the upper left portion of the outer boundary of the second coil 405 and the upper left portion of the inner boundary of the first coil 403. The second dummy block 409 may be disposed between an upper right portion of an outer boundary line of the second coil 405 and an upper right portion of an inner boundary line of the first coil 403. [ The third dummy block 410 may be disposed between a lower right portion of an outer boundary line of the second coil 405 and a lower right portion of an inner boundary line of the first coil 403. The fourth dummy block 411 may be disposed between the left lower portion of the outer boundary line of the second coil 405 and the lower left portion of the inner boundary line of the first coil 403.

The position of the dummy block is not limited to the position of the dummy block, and may be arranged at an intermediate portion that is not the left side or the right side as long as it is the region between the coils.

The first coil 403 and the second coil 405 according to the embodiment may increase the amount of current at the bent portion when power is applied. At this time, the first to fourth dummy blocks 408 to 411 according to the embodiment are disposed at the bent portions where the amounts of currents of the first coil 403 and the second coil 405 increase, The electromagnetic interference between the first coil 403 and the second coil 405 can be blocked. In other words, the first to fourth dummy blocks 408 to 411 according to the embodiment are disposed at the corners where the amount of current of the first coil 403 and the second coil 405 increases, There is an effect that the electromagnetic interference between the first coil 403 and the second coil 405 can be blocked.

The fifth through eighth dummy blocks 412 through 415 may be disposed in the third spacing space 406 on the printed circuit board 401 according to the embodiment. For example, the fifth dummy block 412 may be disposed between the upper left portion of the outer boundary of the third coil 407 and the upper left portion of the inner boundary of the second coil 405. The sixth dummy block 413 may be disposed between the upper right portion of the outer boundary line of the third coil 407 and the upper right portion of the inner boundary line of the second coil 405. The seventh dummy block 414 may be disposed between the right lower portion of the outer boundary line of the third coil 407 and the right lower portion of the inner boundary line of the second coil 405. The eighth dummy block 415 may be disposed between the left lower portion of the outer boundary line of the third coil 407 and the lower left portion of the inner boundary line of the second coil 405.

When the power is applied to the second coil 405 and the third coil 407 according to the embodiment, the amount of current may be increased in the bent portion. At this time, the fifth to eighth dummy blocks 412 to 415 according to the embodiment are disposed at the bent portions where the amount of current of the second coil 405 and the third coil 407 increases, So that electromagnetic interference between the second coil 405 and the third coil 407 can be blocked. In other words, the fifth to eighth dummy blocks 412 to 415 according to the embodiment are disposed at the corners where the amount of current of the second coil 405 and the third coil 407 increases, Electromagnetic interference between the second coil 405 and the third coil 407 can be blocked.

The printed circuit board 401 according to another embodiment of the present invention includes the first to eighth dummy blocks 408 to 415 on the front surface of the printed circuit board 401, At least one dummy block (not shown). For example, the printed circuit board 401 may include other dummy blocks in the same pattern as the first to eighth dummy blocks 408 to 415 on the rear surface of the printed circuit board 401.

The width or thickness of the patterns of the first coil 403 and the second coil 405 according to another embodiment may be different. The amount of current may increase in a portion where the width or the width of the pattern of the first coil 403 and the second coil 405 is wide. At this time, the first to third dummy blocks 408 to 410 may be disposed at a wide portion or a wide portion of the pattern of the first coil 403 and the second coil 405. That is, the first to third dummy blocks 408 to 410 are disposed at a portion having a large width or a wide width of the patterns of the first coil 403 and the second coil 405, Electromagnetic interference or magnetic field between the second coil 403 and the second coil 405 can be blocked.

The widths or thicknesses of the patterns of the second coil 405 and the third coil 407 may vary. A portion of the pattern of the second coil 405 and the third coil 407 having a large width or a wide width may increase the amount of current. At this time, the fifth to eighth dummy blocks 411 to 415 may be disposed at a wide portion or a wide portion of the pattern of the second coil 405 and the third coil 407. That is, the fifth to eighth dummy blocks 411 to 415 are arranged in a portion having a large width or a wide width of the patterns of the second coil 405 and the third coil 407, Electromagnetic interference or magnetic field between the first coil 405 and the third coil 407 can be blocked.

Fig. 5 is an arrangement structure of a coil and a shielding block of an electronic device according to another embodiment.

5, the electronic device 500 according to the embodiment may include a printed circuit board 501, a first coil 503, a second coil 505, and a third coil 507 . The electronic device 500 according to an embodiment may be a multi-coil module or a wireless power receiver including the multi-coil module.

The electronic device 500 according to the embodiment may further include a shielding sheet (not shown). For example, the shielding sheet may be disposed on the printed circuit board 501 and the first to third coils 503, 505, and 507, or may be disposed below the printed circuit board 501 . The shielding sheet may have the same area as the printed circuit board 501. The shielding sheet may shield the magnetic field generated by the first to third coils 503, 505, and 507. For example, the shielding sheet may shield the magnetic field so that the magnetic field does not affect various electronic circuits (not shown) disposed on the printed circuit board 501.

The first coil 503 according to an embodiment may be a coil for near field communication (NFC). For example, the electronic device 500 may transmit and receive a short-range communication signal with another electronic device (not shown) through the first coil 503.

The second coil 505 according to the embodiment may be a coil for magnetic secure transmission (MST). The magnetic security transmission means a method of transmitting magnetic credit card information by wireless transmission. For example, the electronic device 500 may transmit credit card information stored in the electronic device 500 to the credit card payment terminal (not shown) through the second coil 505.

The third coil 507 according to the embodiment may be a wireless charging coil. For example, the electronic device 500 may transmit and receive wireless power through the third coil 507.

The first coil 503 may be spaced apart from the outline of the printed circuit board 501 by a predetermined distance. That is, the first coil 503 may be spaced apart from the outline of the printed circuit board 501 by a predetermined first spacing space 502.

The second coil 505 may be spaced apart from the inner boundary of the first coil 503 by a predetermined distance. That is, the second coil 505 may be spaced apart from the inner boundary of the first coil 503 by a predetermined second spacing space 504.

The third coil 507 may be spaced apart from the inner boundary of the second coil 505 by a predetermined distance. That is, the third coil 507 may be spaced apart from the inner boundary of the second coil 505 by a predetermined third spacing space 506.

The electronic device 500 according to an embodiment may include at least one shielding block. The shielding block may be referred to as a dummy block. The dummy block may be manufactured in various shapes. For example, the dummy block may be formed of a triangular pattern having a sharp top, an inverted triangular pattern having a sharp bottom, a square pattern, or the like.

The dummy block according to the embodiment may be a part of the printed circuit board 501. That is, the dummy block may be included in the printed circuit board 501. For example, the printed circuit board 501 may be manufactured to include the dummy block.

The dummy block according to another embodiment may be part of the shielding sheet. That is, the dummy block may be included in the shielding sheet. For example, the shielding sheet may be manufactured to include the dummy block.

The dummy block according to another embodiment may be a separate metal or plastic material from the printed circuit board 501 or the shielding sheet. For example, the dummy block may be a metal or plastic material to which no current is applied. The dummy block may be disposed through pattern printing on the printed circuit board 501 or the shielding sheet. For example, the dummy block may be simultaneously pattern-printed when the first to third coils 503, 505, and 507 are pattern-printed on the printed circuit board 501 or the shielding sheet. That is, since the dummy block can be formed simultaneously with the coils, an additional process may not be added. That is, the dummy block can be produced without additional process cost.

The electronic device 500 according to the embodiment may include first to eighth dummy blocks 508 to 515. The first through eighth dummy blocks 508 through 515 may be spaced apart from the coils by a predetermined distance. The lengths or thicknesses of the first through eighth dummy blocks 508 through 515 may be equal to or greater than a predetermined length.

The first to fourth dummy blocks 508 to 511 according to the embodiment may be disposed in the second spacing space 504 on the printed circuit board 501.

For example, the first dummy block 508 may be disposed between the upper left portion of the outer boundary of the second coil 505 and the upper left portion of the inner boundary of the first coil 503. The second dummy block 509 may be disposed between an upper right portion of an outer boundary line of the second coil 505 and an upper right portion of an inner boundary line of the first coil 503. The third dummy block 510 may be disposed between the right lower portion of the outer boundary line of the second coil 505 and the right lower portion of the inner boundary line of the first coil 503. The fourth dummy block 511 may be disposed between a left lower portion of the outer boundary line of the second coil 505 and a left lower portion of the inner boundary line of the first coil 503.

The first coil 503 and the second coil 505 according to the embodiment may increase the amount of current at the bent portion when power is applied. At this time, the first to fourth dummy blocks 508 to 511 according to the embodiment are disposed in the bent portion where the amount of current of the first coil 503 and the second coil 505 increases, The electromagnetic interference between the first coil 503 and the second coil 505 can be blocked. In other words, the first to fourth dummy blocks 508 to 511 according to the embodiment are disposed at the corner portions where the amount of current of the first coil 503 and the second coil 505 increases, Electromagnetic interference between the first coil 503 and the second coil 505 can be blocked.

The fifth to eighth dummy blocks 512 to 515 may be disposed in the third spacing space 506 on the printed circuit board 501 according to the embodiment. For example, the fifth dummy block 512 may be disposed between the upper left portion of the outer boundary of the third coil 507 and the upper left portion of the inner boundary of the second coil 505. The sixth dummy block 513 may be disposed between an upper right portion of an outer boundary line of the third coil 507 and an upper right portion of an inner boundary line of the second coil 505. The seventh dummy block 514 may be disposed between the right lower portion of the outer boundary line of the third coil 507 and the right lower portion of the inner boundary line of the second coil 505. The eighth dummy block 515 may be disposed between a lower left portion of the outer boundary of the third coil 507 and a lower left portion of the inner boundary of the second coil 505. [

When the power is applied to the second coil 505 and the third coil 507 according to the embodiment, the amount of current may be increased in the curved portion. At this time, the fifth to eighth dummy blocks 512 to 515 according to the embodiment are disposed in the bent portion where the amount of current of the second coil 505 and the third coil 507 increases, It is possible to prevent electromagnetic interference between the second coil 505 and the third coil 507. In other words, the fifth to eighth dummy blocks 512 to 515 according to the embodiment are disposed at the corners where the amount of current of the second coil 505 and the third coil 507 increases, Electromagnetic interference between the second coil 505 and the third coil 507 can be blocked.

The printed circuit board 501 according to another embodiment of the present invention includes the first to eighth dummy blocks 508 to 515 on the front surface of the printed circuit board 501, At least one dummy block (not shown). For example, the printed circuit board 501 may include other dummy blocks in the same pattern as the first to eighth dummy blocks 508 to 515 on the rear surface of the printed circuit board 501.

The width or thickness of the pattern of the first coil 503 and the second coil 505 according to another embodiment may be different. The amount of current may increase in a portion where the width or the width of the pattern of the first coil 503 and the second coil 505 is wide. At this time, the first to third dummy blocks 508 to 510 may be disposed at a wide portion or a wide portion of the pattern of the first coil 503 and the second coil 505. That is, the first to third dummy blocks 508 to 510 are arranged in a wide or thick portion of the pattern of the first coil 503 and the second coil 505, Electromagnetic interference or magnetic field between the second coil 503 and the second coil 505 can be blocked.

The widths or thicknesses of the patterns of the second coil 505 and the third coil 507 may vary. The amount of the current may increase in a portion where the width or the width of the pattern of the second coil 505 and the third coil 507 is wide. At this time, the fifth to eighth dummy blocks 511 to 515 may be disposed in a portion having a large width or a wide width of the patterns of the second coil 505 and the third coil 507. That is, the fifth to eighth dummy blocks 511 to 515 are arranged in a portion having a large width or a wide width of the pattern of the second coil 505 and the third coil 507, Electromagnetic interference or magnetic field between the first coil 505 and the third coil 507 can be blocked.

6 is a cross-sectional view of a plurality of coils and shielding blocks in yet another embodiment.

The electronic device according to an embodiment may include a printed circuit board, a first coil, a second coil, and a dummy block. The electronic device 300 according to an embodiment may be a multi-coil module or a wireless power receiver including the multi-coil module. The dummy block may be referred to as a shielding block.

The electronic device according to the embodiment may further include a shielding sheet (not shown). For example, the shielding sheet may be disposed between the printed circuit board and the first coil, the second coil, and the dummy block. The shielding sheet may have the same area as the printed circuit board. The shielding sheet may shield the magnetic field generated by the first coil and the second coil. For example, the shielding sheet may shield the magnetic field so that the magnetic field does not affect various electronic circuits (not shown) disposed on the printed circuit board.

The first coil and the second coil according to an embodiment may be a coil for a near field communication (NFC) or a magnetic secure transmission (MST) coil or a wireless charging coil.

The dummy block according to an embodiment may be part of the printed circuit board. That is, the dummy block may be included in the printed circuit board. For example, the printed circuit board may be fabricated to include the dummy block.

The dummy block according to another embodiment may be part of the shielding sheet. That is, the dummy block may be included in the shielding sheet. For example, the shielding sheet may be manufactured to include the dummy block.

According to another embodiment, the dummy block may be a separate metal or plastic material from the printed circuit board or the shielding sheet. For example, the dummy block may be a metal or plastic material to which no current is applied. The dummy block may be disposed on the printed circuit board or the shielding sheet through pattern printing. For example, the dummy block can be simultaneously pattern-printed when the first coil and the second coil are pattern-printed on the printed circuit board or the shielding sheet. That is, since the dummy block can be formed simultaneously with the coils, an additional process may not be added. That is, the dummy block can be produced without additional process cost.

6A, the cross section of the dummy block 604 disposed between the first coil 602 and the second coil 603 may be triangular. At this time, the dummy block 604 can change the direction of the magnetic field generated by the first coil 602 and the second coil 603 upwardly through the inclined surface of the dummy block 604. Accordingly, the dummy block 604 can increase the transmission efficiency of the first coil 602 and the second coil 603. The substrate 601 according to the embodiment may be a printed circuit board or a shielding sheet. At this time, the dummy block 604 can be manufactured integrally with the printed circuit board or the shielding sheet. According to another embodiment, the dummy block 604 may be a shielding block made of a material different from the printed circuit board or the shielding sheet.

Referring to FIG. 6B, the cross section of the dummy block 608 disposed between the first coil 606 and the second coil 607 may have a shape having a sloped surface having a sharp and concave upper portion. At this time, the dummy block 608 can change the direction of the magnetic field generated by the first coil 606 and the second coil 607 upward through the inclined surface of the dummy block 608. Accordingly, the dummy block 608 can increase the transmission efficiency of the first coil 606 and the second coil 607. The substrate 605 according to an embodiment may be a printed circuit board or a shielding sheet. At this time, the dummy block 608 can be manufactured integrally with the printed circuit board or the shielding sheet. According to another embodiment, the dummy block 608 may be a shielding block made of a material different from the printed circuit board or the shielding sheet.

6C, the section of the dummy block 612 disposed between the first coil 610 and the second coil 611 may be inverted triangular. At this time, the dummy block 612 can change the direction of the magnetic field generated by the first coil 610 and the second coil 611 downward through the inclined surface of the dummy block 612. Accordingly, the dummy block 612 can efficiently shield the magnetic field generated by the first coil 610 and the second coil 611. The substrate 609 according to an embodiment may be a printed circuit board or a shielding sheet. At this time, the dummy block 612 may be manufactured integrally with the printed circuit board or the shielding sheet. According to another embodiment, the dummy block 612 may be a shielding block made of a material different from the printed circuit board or the shielding sheet.

Referring to FIG. 6 (d), the end face of the dummy block 616 disposed between the first coil 614 and the second coil 615 may have a shape having a sloped surface having a sharp bottom and a concave bottom. At this time, the dummy block 616 can change the direction of the magnetic field generated by the first coil 614 and the second coil 615 downward through the inclined surface of the dummy block 616. Accordingly, the dummy block 616 can effectively shield the magnetic field generated by the first coil 614 and the second coil 615. The substrate 613 according to the embodiment may be a printed circuit board or a shielding sheet. At this time, the dummy block 616 may be manufactured integrally with the printed circuit board or the shielding sheet. According to another embodiment, the dummy block 616 may be a shielding block made of a material different from the printed circuit board or the shielding sheet.

6 (e), the cross section of the dummy block 620 disposed between the first coil 618 and the second coil 619 may be a square having a predetermined width. At this time, the dummy block 620 can effectively shield the magnetic field generated by the first coil 618 and the second coil 619 through a predetermined width of the dummy block 620. The substrate 617 according to the embodiment may be a printed circuit board or a shielding sheet. At this time, the dummy block 620 may be manufactured integrally with the printed circuit board or the shielding sheet. According to another embodiment, the dummy block 620 may be a shielding block made of a material different from the printed circuit board or the shielding sheet.

6F, a cross section of the first dummy block 624 and the second dummy block 625 disposed between the first coil 622 and the second coil 623 is a rectangle having a predetermined width Lt; / RTI > The first dummy block 624 and the second dummy block 625 can effectively shield the magnetic field generated by the first coil 622 and the second coil 623 through the double shielding structure . The substrate 621 according to the embodiment may be a printed circuit board or a shielding sheet. At this time, the dummy blocks 624 and 625 may be manufactured integrally with the printed circuit board or the shielding sheet. According to another embodiment, the dummy blocks 624 and 625 may be a shielding block made of a material separate from the printed circuit board or the shielding sheet.

6 (g), the first dummy block 629, the second dummy block 630, and the third dummy block 631, which are disposed between the first coil 627 and the second coil 628, The cross section may be a rectangle having a predetermined width. The first to third dummy blocks 629 to 631 can effectively shield the magnetic field generated by the first coil 627 and the second coil 628 through the triple shielding structure. The substrate 626 according to an embodiment may be a printed circuit board or a shielding sheet. At this time, the dummy blocks 629, 630, and 631 may be integrally formed with the printed circuit board or the shielding sheet. According to another embodiment, the dummy blocks 629, 630 and 631 may be a shielding block made of a material different from the printed circuit board or the shielding sheet.

Referring to FIG. 6 (h), the cross section of the dummy block 635 disposed between the first coil 633 and the second coil 634 may be T-shaped. At this time, the dummy block 635 can change the direction of the magnetic field generated by the first coil 633 and the second coil 634 downward through the T shape of the dummy block 635. Accordingly, the dummy block 635 can efficiently shield the magnetic field generated by the first coil 633 and the second coil 634. [ The substrate 632 according to an embodiment may be a printed circuit board or a shielding sheet. At this time, the dummy block 635 may be integrally formed with the printed circuit board or the shielding sheet. According to another embodiment, the dummy block 635 may be a shielding block made of a material different from the printed circuit board or the shielding sheet.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

Claims (10)

Printed circuit board;
A first coil disposed on the printed circuit board and disposed outside the first coil, the first coil for short-range communication;
A second coil disposed on the printed circuit board, disposed outside the second coil, for a short distance communication;
A third coil disposed on the printed circuit board for receiving power wirelessly;
A rectifier for converting AC power received from the third coil to DC power;
A converter for converting the converted DC power to a specific intensity; And
And a shield block disposed between the first coil and the second coil or between the second coil and the third coil. The method according to claim 1,
And a shielding sheet disposed above or below the printed circuit board. The method according to claim 1,
And the second coil is a coil for magnetic security transmission. The method according to claim 1 or 3,
Wherein the first coil is an NFC coil. The method according to claim 1,
And the shield block is spaced apart from the first coil to the third coil. The method according to claim 1,
Wherein the shielding block is disposed in a curved portion of the first to third coils. The method according to claim 1,
The width of the first coil is different,
Wherein the shielding block is disposed in a portion of a larger width of the first coil. The method according to claim 1,
The width of the second coil is different,
And wherein the shield block is disposed in a portion of a larger width of the second coil. 3. The method of claim 2,
Wherein the shielding block is constructed of the same material as the shielding sheet. The method according to claim 1,
Wherein a shape of a cross section of the shielding block is different from a shape of a cross section of the first coil to the third coil.

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