KR20180043993A - Coil Device Of Apparatus For Transmitting And Receiving Wireless Power And Thereof Production Method - Google Patents

Abstract

The present invention provides a coil device using a planar coil, a manufacturing method thereof and a wireless power transmission and reception device including the same. According to an embodiment of the present invention, the coil device comprises: a substrate; a shielding material located on the substrate; and the planar coil located on the shielding material as a coil wire extends to be turned a plurality of times thereon. The coil wire of the planar coil can be separated from each other.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a coil device, a method of manufacturing a coil device, and a coil device,

The present invention relates to a coil device, a method of manufacturing a coil device, and a wireless power transmission / reception device including a coil device.

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.

On the other hand, the coil used in the wireless charging system is more expensive than the other components. Further, when the thickness of the coil is reduced, there is a problem that the resistance increases and the charging efficiency deteriorates.

It is an object of the present invention to provide a coil device using a plane coil, a method of manufacturing the coil device, and a wireless power transmitting / receiving device including the coil device.

The present invention also provides a coil device including a low-cost flat coil, a method of manufacturing the coil device, and a wireless power transmitting / receiving device including the coil device.

It is another object of the present invention to provide a coil device including a plane coil that is easy to mass-produce, a method of manufacturing the coil device, and a wireless power transmitting / receiving device including the coil device.

It is another object of the present invention to provide a coil device including a plane coil having a small thickness and a low resistance value, a method of manufacturing the coil device, and a wireless power transmitting / receiving device including the coil device.

The present invention also provides a coil device including a plane coil having a uniform resistance value, a method of manufacturing the coil device, and a wireless power transmitting / receiving device including the coil device.

It is another object of the present invention to provide a coil device including a plane coil excellent in shielding electromagnetic interference, a method of manufacturing the coil device, and a wireless power transmitting / receiving device including the coil device.

The present invention also provides a coil device including a plane coil integrated with a shielding material, a method of manufacturing the coil device, and a wireless power transmitting / receiving device including the coil device.

The present invention also provides a wireless power transmitting / receiving device including a coil device including a plurality of plane coils, a method of manufacturing the coil device, and a coil device.

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.

According to an aspect of the present invention, there is provided a coil device comprising: a substrate; A shielding material disposed on the substrate; And a planar coil having a plurality of turns and arranged with a coil wire extending on the shielding material, wherein the coil coils are spaced apart from each other.

In a coil device according to another embodiment, the plane coil may be a twisted wire.

In the coil device according to another embodiment, the plane coil may be formed by a pressing process.

In the coil device according to another embodiment, the plane coil may be arranged in a circular spiral shape or a square spiral shape.

In a coil device according to another embodiment, the coil wire may have a right-angled cross-section.

In the coil device according to another embodiment, the coil line may be arranged at both sides of the coil device.

The coil device according to another embodiment may be disposed such that the depth increases as the thickness of the plane coil increases.

The coil device according to another embodiment may be plated on one surface of the plane coil.

In the coil device according to another embodiment, the EMI shield may be disposed on one surface of the plane coil.

In the coil device according to another embodiment, the plane coil may be integrated with the shielding material.

In a coil device according to another embodiment, the plane coil may be arranged in a plurality of layers.

In the coil device according to another embodiment, the plane coil includes a first coil disposed in a first layer, a second coil disposed in a second layer, and an insulating layer disposed between the first coil and the second coil .

According to another embodiment of the present invention, the first coil and the second coil may be connected to each other through the hole of the insulating layer.

In the coil device according to another embodiment, a plurality of the plane coils may be provided, and at least one of the plurality of plane coils may be overlapped.

According to another aspect of the present invention, there is provided a coil device comprising: a substrate; a shielding material disposed on the substrate; and a plane coil disposed on the shielding material; And a drive circuit connected to the plane coil, wherein the plane coil is extended by a plurality of turns of a coil line, and the coil lines are spaced apart from each other.

According to another aspect of the present invention, there is provided a coil device comprising: a substrate; a shielding material disposed on the substrate; and a plane coil disposed on the shielding material; And a control circuit connected to the plane coil, wherein the plane coil is extended by a plurality of turns of a coil wire, and the coil wires are spaced apart from each other.

As another solution to the above-mentioned problem, there is provided a method of manufacturing a semiconductor device, comprising: forming a plane coil; Disposing a shielding material on the substrate; And disposing a plane coil on the shielding material, wherein the plane coil is spaced apart from the coil lines.

According to still another embodiment of the present invention, the step of forming the plane coil may include the step of providing a metal plate.

According to still another embodiment of the present invention, the step of forming the plane coil may further include the step of forming the plane coil by pressing the flat plate.

According to still another embodiment of the present invention, the step of forming the plane coil may include the step of providing a first flat plate made of a metal.

In the method of manufacturing a coil device according to another embodiment, the step of forming the plane coil may further include forming a second flat plate by plating the first flat plate or disposing an EMI shield.

According to another embodiment of the present invention, the step of forming the plane coil may further include forming the plane coil by pressing the second flat plate.

According to still another embodiment of the present invention, the plane coil may be a flat coil.

In the method of manufacturing a coil device according to another embodiment, the coil lines may be arranged on both upper surfaces.

According to still another embodiment of the present invention, the thickness of the planar coil may be increased as the thickness of the planar coil increases.

Effects of the wireless power transmitting and receiving apparatus and the manufacturing method thereof according to the present invention are as follows.

First, the present invention can provide a low-cost flat coil.

Second, the present invention can provide a planar coil capable of mass production.

Second, the present invention can provide a flat coil having a small thickness and a high resistance value uniformity and a low resistance value.

Third, the present invention can provide an excellent planar coil for shielding electromagnetic interference.

Fourth, in the present invention, the plane coil is integrated with the shielding member so that the plane coil can be fixed without any other configuration.

Fifth, the present invention can protect the plane coil from external impact by the integrated shielding material.

Sixth, in the present invention, the planar coil can have a heat-resistant property by the integrated shielding material.

Seventh, the present invention can have a wider charging area by using a plurality of transmission coils, and the user convenience is high.

Eighth, the present invention can use only one of a plurality of identical circuits, so that the size of the wireless power transmitter itself can be reduced, and parts used are reduced, thereby reducing the cost.

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 wireless charging system according to another embodiment.
3 is a diagram for explaining a sensing signal transmission procedure in a wireless charging system according to an embodiment.
4 is a state transition diagram for explaining the wireless power transmission procedure defined in the WPC standard.
5 is a state transition diagram for explaining the wireless power transmission procedure defined in the PMA standard.
6 is a block diagram illustrating a structure of a wireless power transmitter according to an embodiment.
7 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter according to the FIG.
8 is a diagram for explaining a packet format according to an electromagnetic induction wireless power transmission procedure according to an embodiment.
FIG. 9 is a diagram for explaining the types of packets that a wireless power receiving apparatus according to an electromagnetic induction wireless power transmission procedure according to an embodiment can transmit in a ping stage.
10 is a diagram for explaining a message format of an identification packet according to an electromagnetic induction wireless power transmission procedure according to an embodiment.
11 is a diagram for explaining a message format of a configuration packet and a power control hold packet according to an electromagnetic induction wireless power transmission procedure according to an embodiment.
FIG. 12 is a diagram for explaining a type of a packet that can be transmitted in a power transmission step and a message format thereof, in a wireless power receiving apparatus according to an electromagnetic induction wireless power transmission procedure according to an embodiment.
13 is a view for explaining a coil device according to an embodiment.
14 is a view for explaining a manufacturing method of the coil device of Fig.
Fig. 15 is a view for explaining a cross section of a plane coil in the coil device of Fig. 14; Fig.
16 is a view for explaining a coil device according to another embodiment.
Fig. 17 is a view for explaining a manufacturing method of the coil device of Fig. 16; Fig.
Fig. 18 is a view for explaining a cross section of a plane coil in the coil device of Fig. 17; Fig.
19 is a view for explaining a coil device according to still another embodiment.
20 is a view for explaining a planar coil according to another embodiment.
21 is a view for explaining a coil device according to still another embodiment.
22 is a view for explaining a coil device in another embodiment.
23 is an exploded perspective view for explaining the coil device of Fig.
24 is a view for explaining a coil device according to another embodiment.
25 is a view for explaining three drive circuits including a full-bridge inverter in a wireless power transmitter including a plurality of coils according to an embodiment.
26 is a view for explaining a wireless power transmitter including a plurality of coils including one drive circuit according to an embodiment.
27 is a view for explaining a drive circuit including a full-bridge inverter according to an embodiment.
28 is a view for explaining a plurality of switches for connecting any one of a plurality of transmission coils to a drive circuit according to an 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, (Lower) "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 meanings of the related 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 transmitter, a transmitter, a transmitter, a transmitter, , A wireless charging device, or the like. In addition, a wireless power receiving device, a wireless power receiver, a receiving terminal, a receiving side, a receiving device, a receiver terminal, and the like may be used in combination for the sake of convenience of description in the expression for a device for receiving wireless power from a wireless power transmission device.

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, (Hereinafter referred to as a " device ") capable of charging a battery by mounting a wireless power receiving means according to an embodiment, but not limited thereto, may be used for a small electronic device such as a toothbrush, an electronic tag, a lighting device, Quot;), and the term terminal or device may be used in combination. 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 wireless charging technique defined by Wireless Power Consortium (WPC) and Power Matters Alliance (PMA). In addition, the wireless power receiving means for supporting the electromagnetic resonance method may include a resonance wireless charging technique defined in the A4WP (Alliance for Wireless Power) standard mechanism, which is a standard wireless charging technology standard.

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 transmitter 10 that wirelessly transmits power, a wireless power receiver 20 that receives the transmitted power, and an electronic device 30 that receives power Lt; / RTI >

For example, the wireless power transmitter 10 and the wireless power receiver 20 may 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 transmitter 10 and the wireless power receiver 20 may use out-of-band communication to exchange information using a separate frequency band that is different from the operating frequency used for wireless power transmission .

As an example, information exchanged between the wireless power transmitter 10 and the wireless power receiver 20 may include control information as well as status information of each other. Here, the status information and control information exchanged between the transceivers 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.

 In one example, the unidirectional communication may be that the wireless power receiver 20 only transmits information to the wireless power transmitter 10, but the wireless power transmitter 10 is not limited to this, Lt; / RTI >

In the half duplex communication mode, bi-directional communication is possible between the wireless power receiver 20 and the wireless power transmitter 10, but information can be transmitted only by any one device at any time.

The wireless power receiver 20 according to one embodiment may obtain 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 transmitter 10 according to one embodiment may transmit a predetermined packet to the wireless power receiver 20 indicating whether to support fast charging. The wireless power receiver 20 can notify the electronic device 30 if the connected wireless power transmitter 10 is determined to support the fast charge 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.

In addition, the user of the electronic device 30 may select a predetermined fast charge request button displayed on the liquid crystal display means to control the wireless power transmitter 10 to operate in the fast charge mode. In this case, the electronic device 30 may transmit a predetermined fast charge request signal to the wireless power receiver 20 when the quick charge request button is selected by the user. The wireless power receiver 20 can generate a charging mode packet corresponding to the received fast charging request signal and send it to the wireless power transmitter 10 to switch the normal low power charging mode to the fast charging mode.

2 is a block diagram illustrating a wireless charging system according to another embodiment.

For example, as shown in 200a, the wireless power receiver 20 may be configured with a plurality of wireless power receiving devices, wherein a plurality of wireless power receiving devices are connected to one wireless power transmitter 10, Charging may also be performed. In this case, the wireless power transmitter 10 may distribute power to a plurality of wireless power receiving apparatuses in a time division manner, but the present invention is not limited thereto. For example, the wireless power transmitter 10 may transmit Power can be distributed and transmitted to a plurality of wireless power receiving apparatuses using different allocated frequency bands.

At this time, the number of wireless power receiving apparatuses connectable to one wireless power transmitting apparatus 10 is set to at least one of the required power amount for each wireless power receiving apparatus, the battery charging state, the power consumption amount of the electronic apparatus, Can be determined adaptively based on

As another example, as shown in FIG. 200B, the wireless power transmitter 10 may be composed of a plurality of wireless power transmission devices. In this case, the wireless power receiver 20 may be coupled to a plurality of wireless power transmission devices at the same time, and may receive power from the connected wireless power transmission devices at the same time to perform charging. At this time, the number of wireless power transmission apparatuses connected to the wireless power receiver 20 may be adaptively calculated based on the required power amount of the wireless power receiver 20, the battery charging status, the power consumption amount of the electronic apparatus, Can be determined.

3 is a diagram for explaining a sensing signal transmission procedure in a wireless charging system according to an embodiment.

As an example, the wireless power transmitter may be equipped with three transmit coils 111, 112, 113. Each transmit coil may overlap a portion of the transmit coil with a different transmit coil, and the wireless power transmitter may include a predetermined sense signal 117, 127 for sensing the presence of the wireless power receiver through each transmit coil - And sequentially transmits digital ping signals in a predefined order.

As shown in FIG. 3, the wireless power transmitter sequentially transmits the detection signal 117 through the primary sensing signal transmission procedure shown in reference numeral 110, and receives a signal strength indicator (Signal Strength Indicator 116 (or signal strength packet) may be received. Subsequently, the wireless power transmitter sequentially transmits the detection signal 127 through the secondary detection signal transmission procedure shown in the reference numeral 120, and the signal strength indicator 126 is transmitted to the transmission coils 111 and 112 It is possible to control the efficiency (or charging efficiency) - that is, the state of alignment between the transmitting coil and the receiving coil - to identify a good transmitting coil and to allow power to be delivered through the identified transmitting coil, .

As shown in FIG. 3, the reason why the wireless power transmitter performs the two detection signal transmission procedures is to more accurately identify to which transmission coil the reception coil of the wireless power receiver is well aligned.

If the signal strength indicators 116 and 126 are received at the first transmission coil 111 and the second transmission coil 112 as shown in the aforementioned numerals 110 and 120 of FIG. 3, Selects a transmission coil having the best alignment based on the received signal strength indicator 126 in each of the first transmission coil 111 and the second transmission coil 112 and performs wireless charging using the selected transmission coil .

4 is a state transition diagram for explaining the wireless power transmission procedure defined in the WPC standard.

Referring to FIG. 4, power transmission from a transmitter to a receiver according to the WPC standard is largely divided into a selection phase 410, a ping phase 420, an identification and configuration phase 430, And a power transfer phase (step 440).

The selection step 410 may be a phase transition when a specific error or a specific event is detected while initiating a power transmission or maintaining a power transmission. Here, the specific error and the specific event will become clear through the following description. Also, in a selection step 410, the transmitter may monitor whether an object is present on the interface surface. If the transmitter detects that an object is placed on the interface surface, it can transition to the step 420 (S401). In the selection step 410, the transmitter transmits an analog ping signal of a very short pulse and can detect whether an object exists in the active area of the interface surface based on the current change of the transmission coil.

In step 420, the transmitter activates the receiver when an object is sensed, and transmits a digital ping to identify whether the receiver is a WPC compliant receiver. If the transmitter does not receive a response signal for the digital ping (e.g., a signal strength indicator) from the receiver in step 420, then the transmitter may transition back to the selection step 410 (S402). Also, in step 420, the transmitter may transition to a selection step 410 when receiving a signal indicating completion of power transmission from the receiver, i.e., a charging completion signal (S403).

Once the ping stage 420 is complete, the transmitter may transition to an identification and configuration step 430 to collect receiver identification and receiver configuration and status information (S404).

In the identifying and configuring step 430, the sender may determine whether the packet is unexpected, whether a desired packet is received during a predefined period of time (time out), a packet transmission error (transmission error) (No power transfer contract), the process can be shifted to the selection step 410 (S405).

Once the identification and configuration for the receiver is complete, the transmitter may transition to power transfer step 440, which transmits the wireless power (S406).

In the power transfer step 440, the transmitter determines whether an unexpected packet is received, a desired packet is received for a predefined period of time (time out), a violation of a predetermined power transmission contract occurs transfer contract violation, and if the charging is completed, the selection step 410 can be performed (S407).

In addition, in the power transfer step 440, if the transmitter needs to reconfigure the power transfer contract according to changes in the transmitter state, etc., it may transition to the identification and configuration step 430 (S408).

The power transmission contract may be set based on the status and characteristic information of the transmitter and the receiver. For example, the transmitter status information may include information on the maximum amount of transmittable power, information on the maximum number of receivable receivers, and the receiver status information may include information on the requested power and the like.

5 is a state transition diagram for explaining a wireless power transmission procedure defined in the PMA standard;

Referring to FIG. 5, power transmission from a transmitter to a receiver according to the PMA standard is largely divided into a standby phase 510, a digital ping phase 520, an identification phase 530, A Power Transfer Phase 540, and an End of Charge Phase 550. FIG.

The waiting step 510 may be a step of performing a receiver identification procedure for power transmission or transitioning to a specific error or a specific event while sensing a power transmission. Here, the specific error and the specific event will become clear through the following description. Also, at a standby step 510, the transmitter may monitor whether an object is present on the Charging Surface. If the transmitter detects that an object has been placed on the charging surface, or if an RXID retry is in progress, the digital switching may proceed to step 520 (S501). Here, RXID is a unique identifier assigned to a PMA compatible receiver. At the standby step 510, the transmitter transmits an analog ping of a very short pulse and, based on the change in current of the transmitting coil, causes the object to move to the active surface of the interface surface-for example, It can be detected whether or not it exists.

The transmitter transited to the digital pinging step 520 sends a digital finger signal to identify whether the sensed object is a PMA compatible receiver. When sufficient power is supplied to the receiver by the digital ping signal transmitted by the transmitter, the receiver can modulate the received digital ping signal according to the PMA communication protocol and transmit a predetermined response signal to the transmitter. Here, the response signal may include a signal strength indicator indicating the strength of the power received at the receiver. At step 520, the transmitter may transition to the identifying step 530 if a valid response signal is received (S502).

If the response signal is not received or it is determined that it is not a PMA compliant receiver, i.e., it is a Foreign Object Detection (FOD), at step 520, the transmitter can transition to the wait step 510 (S503). As an example, a foreign object (FO) may be a metallic object including coins, keys, and the like.

In the identifying step 530, the transmitter may transition to the wait step 510 if the receiver identification procedure fails or the receiver identification procedure must be re-performed and the receiver identification procedure has not been completed for a predefined period of time S504).

If the transmitter succeeds in identifying the receiver, the transmitter may transition from the identifying step 530 to the power transfer step 540 and start charging (S505).

In the power transfer step 540, the transmitter determines if the desired signal is not received within a predetermined time (Time Out), an FO is detected, or if the voltage of the transmit coil exceeds a predefined reference value, (S506).

Also, in the power transmission step 540, if the temperature sensed by the temperature sensor provided inside the transmitter exceeds a predetermined reference value, the transmitter may transition to the completion of charging step 550 (S507).

In the charge completion step 550, if the transmitter is confirmed that the receiver has been removed from the charging surface, the transmitter can transition to the standby state 510 (S509).

If the measured temperature drops below the reference value in the over temperature state, the transmitter may transition from the charging completion step 550 to the digital charging step 520 in step S510.

In the digital ping phase 520 or the power transfer phase 540, the transmitter may transition to the charge completion phase 550 (S508 and S511) when an End Of Charge (EOC) request is received from the receiver.

6 is a block diagram illustrating a structure of a wireless power transmitter according to an embodiment.

6, the wireless power transmitter 600 may include a power conversion unit 610, a power transmission unit 620, a communication unit 630, a control unit 640, and a sensing unit 650 . It should be noted that the configuration of the wireless power transmitter 600 described above is not necessarily an essential configuration, and may be configured to include more or less components.

As shown in FIG. 6, when power is supplied from the power supply unit 660, the power conversion unit 610 may convert the power to a predetermined intensity.

For this, the power conversion unit 610 may include a DC / DC conversion unit 611 and an amplifier 612.

The DC / DC converting unit 611 may convert DC power supplied from the power supply unit 660 into DC power having a specific intensity according to a control signal of the controller 640.

At this time, the sensing unit 650 may measure the voltage / current of the DC-converted power and provide the measured voltage / current to the controller 640. In addition, the sensing unit 650 may measure the internal temperature of the wireless power transmitter 600 and may provide the measurement result to the controller 640 in order to determine whether overheating occurs. For example, the control unit 640 may adaptively cut off the power supply from the power supply unit 650 or block the supply of power to the amplifier 612 based on the voltage / current value measured by the sensing unit 650 . To this end, a power cutoff circuit may be further provided at one side of the power conversion unit 610 to cut off power supplied from the power supply unit 650 or to cut off power supplied to the amplifier 612.

The amplifier 612 can adjust the intensity of the DC / DC-converted power according to the control signal of the controller 640. For example, the control unit 640 may receive the power reception status information and / or the power control signal of the wireless power receiver through the communication unit 630 and may receive the power control information based on the received power reception status information and / So that the amplification factor of the amplifier 612 can be dynamically adjusted. For example, the power reception status information may include, but is not limited to, the intensity information of the rectifier output voltage, the intensity information of the current applied to the reception coil, and the like. The power control signal may include a signal for requesting power increase, a signal for requesting power reduction, and the like.

The power transmitting unit 620 may be configured to include a multiplexer 621 (or a multiplexer), a transmitting coil 622, and the like. In addition, the power transmitting unit 620 may further include a carrier generator (not shown) for generating a specific operating frequency for power transmission.

The carrier generator may generate a specific frequency for converting the output DC power of the amplifier 612 delivered via the multiplexer 621 to AC power having a specific frequency. In the above description, the AC signal generated by the carrier generator is mixed with the output of the multiplexer 621 to generate AC power. However, this is only an example, It should be noted that they may be mixed only or later.

The frequency of the AC power transmitted to each of the transmission coils according to the embodiment may be different from each other, and another embodiment may be implemented by using a predetermined frequency controller having a function of adjusting the LC resonance characteristic for each transmission coil differently It is also possible to set different resonance frequencies for the respective transmission coils.

However, when the resonant frequencies generated in each of the plurality of transmission coils are different, a separate frequency controller for controlling the resonant frequencies is required, which may increase the size of the wireless power transmitter. Accordingly, in one embodiment, The case where power is transmitted using the same resonance frequency will be described with reference to FIGS. 21 to 23. FIG.

6, the power transmission unit 620 includes a multiplexer 621 and a plurality of transmission coils 622 for controlling the output power of the amplifier 612 to be transmitted to the transmission coil, that is, Th to n < th > transmit coils.

The controller 640 according to an embodiment may transmit power by time division multiplexing for each transmission coil when a plurality of wireless power receivers are connected. For example, if the wireless power transmitter 600 has three wireless power receivers-i. E., The first through third wireless power receivers, respectively, identified through three different transmit coils, i. E., First through third transmit coils , The controller 640 controls the multiplexer 621 so that power can be transmitted through a specific transmission coil in a specific time slot. At this time, the amount of power transmitted to the corresponding wireless power receiver can be controlled according to the length of the time slot allocated for each transmission coil, but this is only one embodiment. The power of the amplifier 612 may be controlled to control the transmission power of each wireless power receiver.

The control unit 640 may control the multiplexer 621 so that the detection signals may be sequentially transmitted through the first through n'th transmission coils 622 during the first detection signal transmission procedure. At this time, the control unit 640 can identify the time at which the sensing signal is transmitted using the timer 655. When the sensing signal transmission time arrives, the control unit 640 controls the multiplexer 621 to output a sensing signal It can be controlled to be transmitted. For example, the timer 650 can send a specific event signal to the control unit 640 at predetermined intervals during the ping transmission step. When the event signal is detected, the control unit 640 controls the multiplexer 621 to transmit the corresponding event signal It is possible to control the digital ping to be transmitted through the coil.

In addition, the control unit 640 may transmit a predetermined transmission coil identifier for identifying a signal strength indicator (Signal Strength Indicator) through a transmission coil from the demodulation unit 632 during the first detection signal transmission procedure, Lt; / RTI > received signal strength indicator. In the second sensing signal sending process, the controller 640 controls the multiplexer 621 so that the sensing signal can be transmitted only through the transmitting coil (s) on which the signal strength indicator is received during the first sensing signal sending procedure You may. In another example, when there are a plurality of transmit coils in which the signal strength indicator is received during the first differential sense signal transmission procedure, the control unit 640 transmits the received transmit coil with the signal strength indicator having the largest value as the second differential sense signal In the procedure, the detection signal may be determined as a transmission coil to be transmitted first, and the multiplexer 621 may be controlled according to the determination result.

The modulator 631 may modulate the control signal generated by the controller 640 and transmit the modulated control signal to the multiplexer 621. Here, the modulation scheme for modulating the control signal includes a frequency shift keying (FSK) modulation scheme, a Manchester coding modulation scheme, a phase shift keying (PSK) modulation scheme, a pulse width modulation scheme, A differential bi-phase modulation method, and the like.

The demodulator 632 can demodulate the detected signal and transmit the demodulated signal to the controller 640 when a signal received through the transmission coil is detected. Here, the demodulated signal may include a signal strength indicator, an error correction (EC) indicator for power control during wireless power transmission, an end of charge indicator (EOC), an overvoltage / overcurrent / overheat indicator, But is not limited to, various status information for identifying the status of the wireless power receiver.

Also, the demodulator 632 can identify which of the transmit coils the demodulated signal is received, and provide the control unit 640 with a predetermined transmit coil identifier corresponding to the identified transmit coil.

 In one example, the wireless power transmitter 600 may obtain the signal strength indicator through in-band communication that uses the same frequency used for wireless power transmission to communicate with the wireless power receiver.

In addition, the wireless power transmitter 600 can transmit wireless power using the transmit coil 622, as well as exchange various information with the wireless power receiver via the transmit coil 622. As another example, the wireless power transmitter 600 may further include a separate coil corresponding to each of the transmission coils 622 (i.e., the first to n < th > transmission coils) It should be noted that it may also perform in-band communication with the receiver.

Although the wireless power transmitter 600 and the wireless power receiver perform in-band communication in the description of FIG. 6, this is merely an example, and the frequency band used for the wireless power signal transmission Directional communication through different frequency bands. For example, the near-end bi-directional communication may be any one of low-power Bluetooth communication, RFID communication, UWB communication, and Zigbee communication.

In particular, the wireless power transmitter 600 according to an embodiment of the present invention may adaptively provide a fast charge mode and a general low power charge mode at the request of the wireless power receiver.

The wireless power transmitter 600 can transmit a signal of a predetermined pattern, which is called a first packet for convenience of explanation, when the fast charge mode is supported. The wireless power receiver 600 may identify that the wireless power transmitter 600 being connected is capable of fast charge when the first packet is received.

In particular, the wireless power receiver may send a first response packet to the wireless power transmitter 600 requesting fast charging if fast charging is required.

In particular, the wireless power transmitter 600 may automatically switch to the fast charge mode and initiate fast charge when a predetermined time has elapsed after the first response packet is received.

For example, when the control unit 640 of the wireless power transmitter 600 transits to the power transmission step 440 or 540 of FIGS. 4 through 5, the control unit 640 controls the first packet to be transmitted through the transmission coil 622 However, this is only one example, and another example of the present invention may be the first packet sent out in the identification and configuration step 430 of FIG. 4 or the identifying step 530 of FIG.

It should be noted that another embodiment may transmit encoded information that can identify whether or not fast charge support is available to the digital ping signal transmitted by the wireless power transmitter 600. [

The wireless power receiver may send a predetermined charge mode packet to the wireless power transmitter 600 where the charge mode is set to fast charge if a fast charge is needed at any point in the power transfer phase. Here, the details of the configuration of the charge mode packet will be clarified through the description of FIGS. 7 to 11 to be described later. Of course, the wireless power transmitter 600 and the wireless power receiver can control the internal operation so that power corresponding to the fast charge mode can be sent and received when the charge mode is changed to the fast charge mode. For example, when the charging mode is changed from the normal low-power charging mode to the fast-charging mode, the overvoltage determination criterion, the over temperature criterion, the low-voltage / high- Level (Optimum Voltage Level), power control offset, and the like can be changed and set.

For example, when the charging mode is changed from the normal low-power charging mode to the fast-charging mode, the threshold voltage for determining the overvoltage may be set to be high enough to enable fast charging. As another example, the critical temperature for determining whether overheating occurs may be set high considering the temperature rise due to fast charging. As another example, the power control offset value, which means the minimum level at which the power at the transmitter is controlled, may be set to a larger value than the general low-power charging mode so that it can converge quickly to the desired target power level in the fast-charge mode.

7 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter according to the FIG.

7, the wireless power receiver 700 includes a receiving coil 710, a rectifier 720, a DC / DC converter 730, a load 740, a sensing unit 750, 760, and a main control unit 770. Here, the communication unit 760 may include at least one of a demodulation unit 761 and a modulation unit 762.

Although the wireless power receiver 700 shown in the example of FIG. 7 is shown as being capable of exchanging information with the wireless power transmitter 600 through in-band communication, this is only one embodiment, The communication unit 760 according to the embodiment may provide near-end bi-directional communication through a frequency band different from the frequency band used for the transmission of the wireless power signal.

AC power received through the receiving coil 710 may be transmitted to the rectifying unit 720. [ The rectifier 720 may convert the AC power to DC power and transmit it to the DC / DC converter 730. [ The DC / DC converter 730 may convert the intensity of the rectifier output DC power to a specific intensity required by the load 740 and then forward it to the load 740. The receiving coil 710 may also include a plurality of receiving coils (not shown), i.e., first to 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 750 may measure the intensity of the DC power output from the rectifier 720 and provide it to the main control unit 770. Also, the sensing unit 750 may measure the intensity of the current applied to the reception coil 710 according to the wireless power reception, and may transmit the measurement result to the main control unit 770. The sensing unit 750 may measure the internal temperature of the wireless power receiver 700 and provide the measured temperature value to the main control unit 770.

For example, the main control unit 770 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 the overvoltage has occurred can be generated and transmitted to the modulating unit 762. Here, the signal modulated by the modulating unit 762 may be transmitted to the wireless power transmitter 600 through the receiving coil 710 or a separate coil (not shown). The main control unit 770 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 762 To be transmitted to the wireless power transmitter 600 via the wireless network. The demodulation unit 761 demodulates the AC power signal between the reception coil 710 and the rectifier 720 or the DC power signal output from the rectifier 720 to identify whether or not the detection signal is received, (770). At this time, the main control unit 770 may control the signal intensity indicator corresponding to the detection signal to be transmitted through the modulation unit 762. [

8 is a diagram for explaining a packet format according to an electromagnetic induction wireless power transmission procedure according to an embodiment.

Referring to FIG. 8, a packet format 800 used for information exchange between a wireless power transmitter and a wireless power receiver includes a preamble 810 for identifying a synchronization for acquiring a demodulation packet, A header (Header 820) field for identifying a type of a message included in the packet, a message (Message 830) field for transmitting the content of the packet (or payload) And a checksum (840) field for identifying whether an error has occurred or not.

As shown in FIG. 8, the packet receiver may identify the size of the message 830 included in the packet based on the value of the header 820.

In addition, the header 820 may be defined for each step of the wireless power transmission procedure, and some values of the header 820 may be defined at different levels. For example, referring to FIG. 8, it should be noted that the header value corresponding to the end power transfer in the ping phase and the power transmission phase in the power transfer phase may be equal to 0x02.

The message 830 includes data to be transmitted at the transmitter of the packet. For example, the data included in the message 830 field may be, but is not limited to, a report, a request, or a response to the other party.

The packet 700 according to another embodiment may further include at least one of transmitter identification information for identifying a transmitter that transmitted the packet and receiver identification information for identifying a receiver to receive the packet. Here, the transmitter identification information and the receiver identification information may include IP address information, MAC address information, product identification information, and the like. However, the present invention is not limited thereto, and information that can distinguish the receiver and the transmitter on the wireless charging system is sufficient.

The packet 800 according to another embodiment may further include predetermined group identification information for identifying the receiving group when the packet is to be received by a plurality of apparatuses.

FIG. 9 is a diagram for explaining the kinds of packets that the wireless power receiving apparatus according to the electromagnetic induction type wireless power transmission procedure according to one embodiment can transmit in the ping stage.

9, the wireless power receiving apparatus can transmit a signal strength packet or a power transmission stop packet.

Referring to reference numeral 901 in FIG. 9, the message format of the signal strength packet according to an exemplary embodiment may be composed of a signal strength value having a size of 1 byte. The signal strength value may indicate the degree of coupling between the transmitting coil and the receiving coil and may be calculated based on the rectifier output voltage in the digital ping section, the open circuit voltage measured in the output blocking switch, Lt; / RTI > The signal strength value may range from a minimum of 0 to a maximum of 255 and may have a value of 255 if the actual measured value for a particular variable is equal to the maximum value of that variable (Umax).

For example, the signal strength value may be calculated as U / Umax * 256.

Referring to reference numeral 902 in FIG. 9, the message format of the power transmission stop packet according to an exemplary embodiment may be configured as an end power transfer code having a size of 1 byte.

The reasons why the wireless power receiving apparatus requests the wireless power transmitter to stop the power transmission include charging completion, internal fault, overtemperature, overvoltage, overcurrent, battery But is not limited to, Battery Failure, Reconfigure, and No Response. It should be noted that the power transmission interruption code may be further defined in response to each new power transmission interruption reason.

Charging complete can be used to indicate that the charging of the receiver battery is complete. Internal errors can be used when a software or logical error in the internal operation of the receiver is detected.

Overheating / overvoltage / overcurrent can be used when the measured temperature / voltage / current value at the receiver exceeds the defined threshold for each.

Battery damage can be used if it is determined that there is a problem with the receiver battery.

Reconfiguration can be used when renegotiation is required for power transmission conditions. No response can be used if the transmitter's response to the control error packet - meaning increasing or decreasing the strength of the power - is judged to be unhealthy.

10 is a diagram for explaining a message format of an identification packet according to an electromagnetic induction wireless power transmission procedure according to an embodiment.

10, the message format of the identification packet includes a Version Information field, a Manufacturer Information field, an Extension Indicator field, and a Basic Device Identification Information field Lt; / RTI >

In the version information field, revision version information of a standard applied to the wireless power receiving apparatus can be recorded.

In the manufacturer information field, a predetermined identification code for identifying the manufacturer of the wireless power receiving apparatus may be recorded.

The extension indicator field may be an indicator for identifying whether an extended identification packet including the extended device identification information exists. For example, if the value of the extension indicator is 0, it means that there is no extension identification packet, and if the extension indicator value is 1, it means that the extension identification packet exists after the identification packet.

Referring to reference numerals 1001 to 1002, if the extension indicator value is 0, the device identifier for the corresponding wireless power receiver may be a combination of manufacturer information and basic device identification information. On the other hand, if the extension indicator value is 1, the device identifier for the wireless power receiver may be a combination of manufacturer information, basic device identification information, and extended device identification information.

11 is a diagram for explaining a message format of a configuration packet and a power control hold packet according to an electromagnetic induction wireless power transmission procedure according to an embodiment.

11, the message format of the configuration packet may have a length of 5 bytes, and may include a power class field, a maximum power field, a power control field, A count field, a window size field, a window offset field, and the like.

The power rating field may record the power rating assigned to the wireless power receiver.

The maximum power field may record the intensity value of the maximum power that can be provided at the rectifier output of the wireless power receiver.

For example, in the case where the power level is a and the maximum power is b, the maximum power amount Pmax desired to be provided at the rectifier output of the wireless power receiving apparatus can be calculated as (b / 2) * 10 ^a .

The power control field can be used to indicate which algorithm should be used to control the power in the wireless power transmitter. For example, if the power control field value is 0, it implies applying the power control algorithm defined in the standard, and if the power control field value is 1, it means that the power control is performed according to the algorithm defined by the manufacturer.

The count field may be used to record the number of option configuration packets that the wireless power receiving device will send in the identification and configuration phase.

The window size field may be used to record the window size for calculating the average received power. As an example, the window size may be a positive integer value that is greater than zero and has a unit of 4 ms.

In the window offset field, information for identifying the time from the end of the average reception power calculation window to the transmission start point of the next received power packet may be recorded. In one example, the window offset may be a positive integer value greater than zero and in units of 4 ms.

Referring to reference numeral 1102, the message format of the power control hold packet may be configured to include a power control hold time (T_delay). A plurality of power control hold packets may be transmitted during the identification and configuration phase. For example, up to seven power control pending packets may be transmitted. The power control hold time (T_delay) may have a value between a predefined power control hold minimum time (T_min: 5 ms) and a power control hold maximum time (T_max: 205 ms). The wireless power transmission apparatus can perform power control using the power control retention time of the power control retention packet last received in the identification and configuration step. Also, the wireless power transmission apparatus can use the T_min value as the T_delay value when the power control hold packet is not received in the identification and configuration step.

The power control retention time may refer to the time that the wireless power transmission apparatus should wait without performing the power control before performing the actual power control after receiving the latest control error packet.

FIG. 12 is a diagram for explaining a type of a packet that can be transmitted in a power transmission step and a message format thereof by a wireless power receiving apparatus according to an electromagnetic induction wireless power transmission procedure according to an embodiment.

12, a packet that can be transmitted by the wireless power receiving apparatus in the power transmission step includes a control error packet, an end power transfer packet, a received power packet, A packet (Charge Status Packet), a packet defined by a manufacturer, and the like.

Reference numeral 1201 denotes a message format of a control error packet composed of a 1-byte control error value. Here, the control error value may be an integer value ranging from -128 to +127. If the control error value is negative, the transmission power of the radio power transmission apparatus decreases, and if it is positive, the transmission power of the radio power transmission apparatus can be increased.

Reference numeral 1202 denotes a message format of an End Power Transfer Packet consisting of a 1-byte End Power Transfer Code.

Reference numeral 1203 denotes a received power packet of a received power packet including a 1-byte received power value. Here, the received power value may correspond to the average rectifier received power value calculated during a predetermined period. The actual received power amount (P _received ) can be calculated based on the maximum power and the power class included in the configuration packet 1001. As an example, the actual amount of power received can be calculated by (received power value / 128) * (maximum power / 2) * (10 ^{power rating} ).

Reference numeral 1204 denotes a message format of a Charge Status Packet consisting of a 1-byte Charge Status Value. The charge state value may indicate the battery charge amount of the wireless power receiving device. For example, the charge state value 0 means a completely discharged state, the charge state value 50 may mean a 50% charge state, and the charge state value 100 may mean a full charge state. If the wireless power receiving device does not include a rechargeable battery or can not provide charge state information, the charge state value may be set to OxFF.

<Coil Apparatus>

13 is a view for explaining a coil device according to an embodiment.

The coil device according to an embodiment may be a coil of at least one of a transmission coil of a wireless power transmission device or a reception coil of a wireless power reception device. Further, the present invention is not limited to a wireless power transmission apparatus, and can be applied to an apparatus using a coil for wirelessly transmitting an induced electromotive force.

Referring to FIG. 13, a coil device 1300 according to an embodiment may include a substrate 1340. Substrate 1340 can be a flexible substrate and can be a rigid substrate.

The coil device 1300 according to one embodiment may include a shielding material 1330. The shielding member 1330 may be disposed on the upper surface of the substrate 1340. The shielding member 1330 can guide the wireless power generated by the plane coil 1310 disposed in the upper portion in the charging direction and protect various circuits disposed below from the electromagnetic field.

The coil device 1300 according to one embodiment may include an adhesive 1320. The adhesive 1320 is disposed between the plane coil 1310 and the shielding material 1330 and can fix the plane coil 1310 by an adhesive force. In addition, the adhesive 1320 may be disposed as an adhesive member to engage with the plane coil 1310 to fix the plane coil 1310. [

The coil device 1300 according to one embodiment may include a plane coil 1310. The plane coil 1310 may be an inductive coil or a resonant coil. Further, the plane coil 1310 may include first and second coils, the first coil may be an induction coil, and the second coil may be a resonance coil. The planar coil 1310 may be disposed on the substrate 1340 or on the shielding material 1320.

In addition, the plane coil 1310 of the coil device 1300 according to an exemplary embodiment may be at least one of a spiral shape, a circular shape, an elliptical shape, a racetrack shape, a rectangular shape, a triangular shape, And can be arranged to turn. For example, when the coil device 1300 is viewed from above as shown in FIG. 13, the plane coil 1310 may be arranged in a circular shape or a spiral shape. More specifically, the plane coil 1310 is disposed in the inner region at one end 1311 where the AC signal is applied or outputted, and the other end 1312 at which the AC signal is outputted or applied, And may be extended by turning a plurality of times. 13, the plane coil 1310 is arranged to be turned 13 times, but it is not limited thereto.

In addition, the plane coil 1310 of the coil device 1300 according to one embodiment may be a tether. That is, the coil line of the plane coil 1310 may not be coated with a coating which is an insulator.

Coils formed on a flat surface by using an etching process, which is a conventional technique, are complicated in the manufacturing process and are limited in mass production. In addition, the coil formed by the etching process has a limitation in increasing the separation distance between the coil lines due to the characteristics of the etching process. In addition, the coil formed by using the etching process has a lot of portions where the upper portion of the coil line is etched due to the characteristics of the etching process, so that waste of the raw material is severe. Further, since the coil formed by using the etching process has many portions where the upper portion of the coil line is etched, the area becomes narrow and the resistance increases. In addition, the coil formed using the etching process has a problem that the portion to be etched is irregular and the resistance uniformity is low.

The planar coil 1310 of the coil device 1300 according to one embodiment may be formed by a pressing process. For example, the planar coil 1310 may be formed in a shape (for example, a spiral shape, a circular shape, an ellipse A racetrack shape, a square shape, a triangular shape, or the like). Thus, the plane coil 1310 can be arranged as a bare wire without coating. Further, the plane coil 1310 may be disposed so that the coil lines are spaced apart from each other. More specifically, since the coiled coil 1310 is a parasitic wire, when the coiled coil 1310 is in contact with the coiled coil 1310, the coils can not function or the inductance value can be changed. More specifically, the separation distance a1 may be 0.1 mm or more and 2.5 mm or less. More specifically, the separation distance a1 may be 0.7 mm. In addition, the plane coil 1310 may have a rectangular cross-section of the coil wire. Further, the plane coil 1310 may be arranged on both upper surfaces of the coil line, which is a cutting portion, due to the pressing process. The thickness a2 of the coil wire of the plane coil 1310 may be 0.01 mm or more and 2.5 mm or less. The width a3 of the coil wire of the plane coil 1310 may be 0.5 mm or more and 2 mm or less. For example, the width a3 of the coil line of the plane coil 1310 may be 1.1 mm.

Thus, one embodiment can provide a low cost flat coil without using expensive coils coated with a coil wire coating. In addition, one embodiment can provide a flat coil which can be mass-produced by using a pressing process. In addition, one embodiment can provide a planar coil having a thinner thickness than the coil formed by the etching process and having a high resistance uniformity and a low resistance value.

Fig. 14 is a view for explaining the manufacturing method of the coil device of Fig. 13, and Fig. 15 is a view for explaining a cross section of the plane coil in the coil device of Fig.

The method of manufacturing a coil device according to an embodiment may include forming a plane coil 1411. A method of manufacturing a coil device according to an embodiment may include disposing a shielding material on a substrate. In addition, a method of manufacturing a coil device according to an embodiment may include disposing an adhesive on a shielding material. In addition, the method of manufacturing a coil device according to an embodiment may include disposing a plane coil 1411 on the adhesive.

Referring to FIG. 14 (a), the step of forming the plane coil 1411 may include the step of providing a metal plate 1410. The flat plate 1410 may be made of a conductive material, and thus may include a metal material or a metal material. In addition, the step of forming the plane coil 1411 may include the step of forming the plane coil 1411 by pressing the flat plate 1410. More specifically, the step of forming the plane coil 1411 by pressing the flat plate 1410 may include removing the unnecessary portion of the flat plate 1410 to remove the shape of the coil (e.g., a spiral shape, , An elliptical shape, a racetrack shape, a rectangular shape, a triangular shape, and the like). For example, as shown in Fig. 14B, the plane coil 1411 may be formed in a spiral shape or a circular shape. In addition, the step of forming the plane coil 1411 may form not only one flat plate 1410 but also two or more plane coils 1411.

Thus, one embodiment can provide a low cost flat coil without using expensive coils coated with a coil wire coating. In addition, one embodiment can provide a flat coil which can be mass-produced by using a pressing process. In addition, one embodiment can reduce the manufacturing cost by reusing the flat plate removed in the pressing process to form the plane coil. In addition, one embodiment can provide a planar coil having a thinner thickness than the coil formed by the etching process and having a high resistance uniformity and a low resistance value.

Fig. 15 is a cross-section of the coil line I-II of the plane coil 1411 of Fig. 14 (b).

When the flat coil 1411 is formed by a pressing process, the flat coil 1411 may be formed corresponding to a portion cut on the upper portion of the coil line. More specifically, the depth of the flat coil 1411 may be different depending on the thickness of the flat plate 1410. More specifically, as the thickness of the flat plate 1410 of the flat coil 1411 increases, the simulated depth may increase.

Figs. 15A to 15C are cross-sectional views of the planar coil 1411 in accordance with the thickness of the plane coil 1411.

Referring to FIG. 15A, the plane coil 1411a has a thickness of about 1 / 100th of the thickness of the coil line corresponding to the portion cut on the top of the coil line when the thickness of the coil line is the first thickness b1 The mother of the corresponding first depth b2 may be arranged.

15B, when the thickness of the coil wire is equal to or less than 4.0 mm and the thickness b3 of the coil wire is equal to or less than 4.0 mm, the plane coil 1411b corresponds to a portion cut on the upper portion of the coil wire, And the second depth b4 corresponding thereto can be arranged.

15 (c). In the case of the third thickness b5 having the thickness of the coil line exceeding 4.0 mm, the plane coil 1411c has a depth b6 corresponding to 1/5 of the thickness of the coil line corresponding to the portion cut on the upper portion of the coil line .

16 is a view for explaining a coil device according to another embodiment.

The coil device according to another embodiment may be a coil of at least one of a transmission coil of the wireless power transmission device or a reception coil of the wireless power reception device. Further, the present invention is not limited to a wireless power transmission apparatus, and can be applied to an apparatus using a coil for wirelessly transmitting an induced electromotive force.

Referring to FIG. 16, a coil device 1500 according to another embodiment may include a substrate 1540. Substrate 1540 can be a flexible substrate and can be a rigid substrate.

The coil device 1500 according to another embodiment may include a shielding material 1530. The shielding member 1530 may be disposed on the upper surface of the substrate 1540. The shielding member 1530 can guide the radio power generated in the plane coil 1510 disposed in the upper portion in the charging direction and protect various circuits disposed below from the electromagnetic field.

The coil device 1500 according to another embodiment may include an adhesive 1520. The adhesive 1520 is disposed between the plane coil 1510 and the shielding material 1530 and can fix the plane coil 1510 by an adhesive force. In addition, the adhesive 1520 may be disposed as an adhesive member to engage with the plane coil 1510 to fix the plane coil 1510.

The coil device 1500 according to another embodiment may include a plane coil 1510. The plane coil 1510 may be an inductive coil or a resonant coil. Further, the plane coil 1510 may include first and second coils, the first coil may be an induction coil, and the second coil may be a resonance coil. The plane coil 1510 may be disposed on the substrate 1540 or on the shield 1520.

The plane coil 1510 of the coil device 1500 according to another exemplary embodiment may be at least one of a spiral shape, a circular shape, an elliptical shape, a racetrack shape, a rectangular shape, a triangular shape, And can be arranged to turn. For example, when the coil device 1500 is viewed from above as shown in FIG. 16, the plane coil 1510 may be arranged in a circular shape or a spiral shape. More specifically, the plane coil 1510 is disposed in the outer region and is disposed in the inner region at one end 1514 at which the AC signal is applied or outputted, and has the other end 1515 at which the AC signal is output or applied, And may be extended by turning a plurality of times. In Fig. 16, the plane coil 1510 is arranged to be turned 13 times, but it is not limited thereto.

In addition, the planar coil 1510 of the coil device 1500 according to another embodiment may be a copper wire to which a plated or EMI shield is applied. More specifically, the plane coil 1510 may be plated on the top and bottom or an EMI shield may be applied. Further, the planar coil 1510 may be plated only on the upper portion, or an EMI shield may be applied, and only the lower portion may be plated or an EMI shield may be applied. For example, the coil line of the plane coil 1510 may include a first portion 1511 to a third portion 1513. The first portion 1511 and the third portion 1512 are formed by plating or EMI shielding application, and the second portion 1512 is a pendent wire. The first portion 1511 may be disposed on the upper portion of the tether 1512 and the second portion 1513 may be disposed on the lower portion of the tether 1512. [ Therefore, the electrical characteristics (such as resistance reduction) and physical properties (durability increase, etc.) of the coil can be changed depending on the use environment by plating the plane coil. In addition, EMI shield can be applied to the plane coil to meet electromagnetic specifications.

Further, the plane coil 1510 may not be coated with a coating which is an insulator.

Coils formed on a flat surface by using an etching process, which is a conventional technique, are complicated in the manufacturing process and are limited in mass production. In addition, the coil formed by the etching process has a limitation in increasing the separation distance between the coil lines due to the characteristics of the etching process. In addition, the coil formed by using the etching process has a lot of portions where the upper portion of the coil line is etched due to the characteristics of the etching process, so that waste of the raw material is severe. Further, since the coil formed by using the etching process has many portions where the upper portion of the coil line is etched, the area becomes narrow and the resistance increases. In addition, the coil formed using the etching process has a problem that the portion to be etched is irregular and the resistance uniformity is low.

The planar coil 1510 of the coil device 1500 according to another embodiment may be formed by a pressing process. For example, the planar coil 1510 may be formed in a shape (for example, the spiral described above) by using a press process or the like, a flat plate of a metal plate plated on one surface or both surfaces as described in a manufacturing method of a coil device A circle shape, an ellipse shape, a racetrack shape, a rectangular shape, a triangular shape, or the like). Thus, the plane coil 1510 can be disposed in a paddle coated on one or both surfaces without coating the coating. Further, the plane coil 1510 can be arranged such that the coil lines are spaced apart from each other. More specifically, the plane coil 1510 may be disposed at a distance of c1, since the coil 1510 is a pantograph coated with a coil wire, and thus can not function as a coil or change an inductance value when they contact each other. More specifically, the separation distance c1 may be 0.1 mm or more and 2.5 mm or less. More specifically, the separation distance c1 may be 0.7 mm. Further, the plane coil 1510 may have a rectangular cross-section of the coil wire. Further, the plane coil 1510 may be arranged on both upper surfaces of the coil line, which is a cutting portion, due to the pressing process. The thickness c2 of the coil wire of the plane coil 1510 may be 0.01 mm or more and 2.5 mm or less. The width c3 of the coil wire of the plane coil 1510 may be 0.5 mm or more and 2 mm or less. For example, the width c3 of the coil wire of the plane coil 1510 may be 1.1 mm.

Therefore, another embodiment can provide a low-cost flat coil without using an expensive coil coated with a coil wire. Further, another embodiment uses a pressing process, so that it is possible to provide a flat coil capable of mass production. Further, another embodiment can provide a planar coil having a thinner thickness than the coil formed by the etching process, a high uniformity of the resistance value, and a low resistance value. Further, other embodiments can improve the electrical or physical properties by plating the coil wire. In another embodiment, electromagnetic shielding may be applied by applying an EMI shield to the coil wire.

FIG. 17 is a view for explaining the method of manufacturing the coil device of FIG. 16, and FIG. 18 is a view for explaining a cross section of the plane coil in the coil device of FIG.

The method of manufacturing a coil device according to another embodiment may include forming a plane coil 1630. [ A method of manufacturing a coil device according to another embodiment may include disposing a shielding material on a substrate. Further, the manufacturing method of the coil device according to another embodiment may include the step of disposing the adhesive on the shielding material. In addition, the method of manufacturing a coil device according to another embodiment may include disposing a plane coil 1630 on the adhesive.

Referring to FIG. 17 (a), the step of forming the plane coil 1630 may include the step of providing a first flat plate 1610 made of a metal. Since the first flat plate 1610 may be made of a conductive material, it may be made of a metal material or a metal material.

Referring to FIG. 17B, the step of forming the plane coil 1630 may include the step of plating the first flat plate 1610 or applying the EMI shield to form the second flat plate 1620. More specifically, Fig. 17 (c) is a cross-sectional view of III-IV of the second flat plate 1620 in Fig. 17 (b). The second flat plate 1620 may be plated 1621 on one or both surfaces of the first flat plate 1610. The two flat plates 1620 may be provided with EMI shields on one or both sides of the first flat plate 1610.

In addition, the step of forming the planar coil 1630 may include forming the planar coil 1630 by pressing the second flat plate 1620. More specifically, the step of forming the planar coil 1630 by pressing the second flat plate 1620 may include removing the unnecessary portion of the second flat plate 1620 to form the shape of the coil (for example, spiral) A circle shape, an ellipse shape, a racetrack shape, a rectangular shape, a triangular shape, and the like). For example, as shown in FIG. 17D, the plane coil 1630 may be formed in a spiral shape or a circular shape. In addition, the step of forming the plane coil 1630 may form not only one but also two or more plane coils 1630 as one second flat plate 1620.

Therefore, another embodiment can provide a low-cost flat coil without using an expensive coil coated with a coil wire. Further, another embodiment uses a pressing process, so that it is possible to provide a flat coil capable of mass production. Further, another embodiment can reduce the manufacturing cost since the flat coil removed can be formed by reusing the flat plate removed in the pressing process. Further, another embodiment can provide a planar coil having a thinner thickness than the coil formed by the etching process, a high uniformity of the resistance value, and a low resistance value. Another embodiment is a simple process of applying a plating or EMI shield to a plane coil.

18 is a cross-section of the coil line V-VI of the plane coil 1630 of Fig. 17 (d).

When the flat coil 1630 is formed by a pressing process, the flat coil 1630 may be formed corresponding to a portion cut on the upper portion of the coil line. More specifically, the depth of the flat coil 1630 may be different depending on the thickness of the flat plate 1630. More specifically, as the thickness of the flat plate 1630 of the flat coil 1630 increases, the simulated depth may increase.

18A to 18C are cross-sectional views of the planar coil 1630 according to the thickness of the planar coil 1630 taken along the line V-VI.

18 (a), the plane coil 1630a includes a first portion 1631a or a third portion 1633a to which a plating or EMI shield is applied, and includes a second portion 1632a which is a stranded wire . The planar coil 1630a has a first depth d2 corresponding to 1/100 of the thickness of the coil line corresponding to the portion cut on the top of the coil line when the thickness of the coil line is the first thickness d1 of 1.0 mm or less .

18B, the plane coil 1630b includes a first portion 1631b or a third portion 1633b to which a plating or EMI shield is applied, and includes a second portion 1632b that is a piercing line . The planar coil 1630b has a second depth d4 corresponding to one-tenth of the thickness of the coil line corresponding to the portion cut on the top of the coil line when the thickness of the coil line is a second thickness d3 of 4.0 mm or less .

Referring to FIG. 18 (c). The planar coil 1630c may include a first portion 1631c or a third portion 1633c to which a plating or EMI shield is applied and may include a second portion 1632c that is a parasitic line. In the case of the third thickness d5 having a thickness of the coil line of more than 4.0 mm, the plane coil 1630c has a depth d6 corresponding to 1/5 of the thickness of the coil line corresponding to the portion cut on the top of the coil line .

19 is a view for explaining a coil device according to still another embodiment.

The coil device according to another embodiment may be a coil of at least one of a transmission coil of the wireless power transmission device or a reception coil of the wireless power reception device. Further, the present invention is not limited to a wireless power transmission apparatus, and can be applied to an apparatus using a coil for wirelessly transmitting an induced electromotive force.

Referring to FIG. 19, a coil device 2100 according to another embodiment may include a substrate 2130. The substrate 2130 may be a flexible substrate and may be a rigid substrate.

The coil device 2100 according to another embodiment may include a shielding material 2120. [ The shielding member 2120 may be disposed on the upper surface of the substrate 2130. The shielding member 2120 can guide the wireless power generated in the plane coil 1310 disposed in the upper portion in the charging direction and protect various circuits disposed below from the electromagnetic field. In addition, the shielding member 2120 may be disposed integrally with the plane coil 2110. More specifically, the shielding member 2120 may be disposed on the inner side, the outer side, and the bottom side of the plane coil 2110. More specifically, the shielding material 2120 corresponds to the bottom surface of the substrate 2130 and the single-sided coil 211, and has a bottom 2123 as a first layer, a side 2122 corresponding to the outside of the plane coil 2110, And a second layer in which a central portion 2112 corresponding to the inner circumference of the plane coil 2110 is disposed. The plane coil 2110 may be disposed on the second layer of the shielding material 2120. The height of the side portion 2122 of the shielding member 2120 may be equal to or larger than the height f2 of the plane coil 2110. [ The width f4 of the side portion 2122 may be 0.1 mm or more. The height of the center portion 2112 of the shielding member 2120 may be equal to or greater than the height f2 of the plane coil 2110. [ The width f5 of the central portion 2112 may correspond to the inner length of the plane coil 2110. [ Accordingly, the shielding member 2120 can fix the plane coil 2110. In addition, the shielding member 2120 may protect the plane coil 2110 from an external impact. The coil device 2100 according to another embodiment may include a plane coil 2110. The plane coil 2110 may be an induction coil or a resonance coil. Further, the plane coil 2110 may include first and second coils, the first coil may be an induction coil, and the second coil may be a resonance coil. The plane coil 2110 may be integrated and disposed within the shielding member 2120.

The plane coil 2110 of the coil device 2100 according to another embodiment may have a spiral shape, a circular shape, an elliptical shape, a racetrack shape, a rectangular shape, a triangular shape, And may be arranged to be turned once. For example, when the coil device 2100 is viewed from above as shown in FIG. 19, the plane coil 2110 may be arranged in a circular shape or a spiral shape. More specifically, the plane coil 2110 is disposed in the outer region and disposed in the inner region at one end 2111 to which the AC signal is applied or outputted, and the other end 2112 at which the AC signal is outputted or applied, And may be extended by turning a plurality of times. Also, one end 2111 of the plane coil 2110 can contact the side 2122 of the shielding material 2120. [ The other end 2112 of the plane coil 2110 can be in contact with the central portion 2121 of the shielding member 2120. In FIG. 19, the plane coil 2110 is arranged to be turned 13 times, but it is not limited thereto.

In addition, the plane coil 2110 of the coil device 2100 according to another embodiment may be a twisted wire. Also, the plane coil 2110 may be plated on one or both sides or an EMI shield may be applied, and the coil wire of the plane coil 2110 may not be coated with a coating that is an insulator.

Coils formed on a flat surface by using an etching process, which is a conventional technique, are complicated in the manufacturing process and are limited in mass production. In addition, the coil formed by the etching process has a limitation in increasing the separation distance between the coil lines due to the characteristics of the etching process. In addition, the coil formed by using the etching process has a lot of portions where the upper portion of the coil line is etched due to the characteristics of the etching process, so that waste of the raw material is severe. Further, since the coil formed by using the etching process has many portions where the upper portion of the coil line is etched, the area becomes narrow and the resistance increases. In addition, the coil formed using the etching process has a problem that the portion to be etched is irregular and the resistance uniformity is low.

The plane coil 2110 of the coil device 2100 according to another embodiment may be formed by a pressing process. For example, the plane coil 2110 may be a flat plate made of a metal material, or a flat plate having a plated or EMI shield applied thereto, in a designed shape (e.g., a spiral shape, a circular shape, Such as a racetrack shape, a rectangular shape, a triangular shape, or the like. Thus, the plane coil 2110 can be disposed of as a paddle wire coated with a coating, or coated with a EMI shield. Further, the plane coil 2110 can be arranged such that the coil lines are spaced apart from each other. More specifically, since the coil 2110 is a parasitic wire, the coil 2110 can not function as a coil when it contacts with the coil 2110, or the inductance value can be changed. Therefore, the coil 2110 can be spaced apart by the distance f1. More specifically, the separation distance f1 may be 0.1 mm or more and 2.5 mm or less. More specifically, the separation distance f1 may be 0.7 mm. Further, the plane coil 2110 may have a rectangular cross-section of the coil wire. Further, the plane coil 2110 may be arranged on both upper surfaces of the coil line, which is a cutting portion, due to the pressing process. The thickness f2 of the coil wire of the plane coil 2110 may be 0.01 mm or more and 2.5 mm or less. The width f3 of the coil wire of the plane coil 2110 may be 0.5 mm or more and 2 mm or less. For example, the width f3 of the coil line of the plane coil 2110 may be 1.1 mm.

Therefore, another embodiment can provide an inexpensive flat coil without using an expensive coil coated with a coil wire. Further, another embodiment uses a pressing process to provide a flat coil capable of mass production. Still another embodiment provides a planar coil having a thinner thickness than a coil formed by an etching process, a uniform resistance value, and a low resistance value. In yet another embodiment, the planar coil may be integrated with the shielding material so that the planar coil can be fixed without a separate configuration. Still another embodiment can protect the plane coil from an external impact by the integrated shielding material. In another embodiment, the planar coil can have a heat-resistant property by the integrated shielding material.

20 is a view for explaining a planar coil according to another embodiment.

Referring to FIG. 20, the planar coil 1710 according to another embodiment may be disposed at least once in a rectangular shape. For example, when the coil device 1700 is viewed from above as shown in FIG. 20, the plane coil 1710 may be arranged in a rectangular shape or a square spiral shape. More specifically, the plane coil 1710 is disposed in the inner region at one end 1711, which is disposed in the outer region and to which AC signals are applied or outputted, and has a rectangular shape or a square spiral shape As shown in FIG. That is, the planar coil can be turned a plurality of times by extending straightly at one end 1711 and then turning once so that the path changes in a right angle direction to have a rectangular shape, and turns twice inward. 20, the plane coil 2110 is arranged to be turned 13 times, but the present invention is not limited thereto.

21 is a view for explaining a coil device according to still another embodiment.

Referring to FIG. 21, in the coil device according to another embodiment, the first electric wire 1821 and the second electric wire 1822 may be electrically connected to the plane coil 1810 according to FIG. 13 to FIG. More specifically, the first wire 1821 can be electrically connected to the first end 1831 of the plane coil 1810 by the first connection portion 1831. The second wire 1822 may be electrically connected to the other end 1832 of the plane coil 1810 by the second connection portion 1832. The first connection portion 1831 and the second connection portion 1832 may be formed by soldering or may be a connector. The first wire 1821 and the second wire 1822 can provide an alternating current or an alternating current by the power conversion unit 610 of the wireless power transmission apparatus and the rectifier 720 of the wireless power receiving apparatus can supply alternating current Or an alternating current. The first wire 1821 and the second wire 1822 may be enamel copper wires. The thickness of the first wire 1821 and the second wire 1822 may be greater than the thickness of the plane coil 1810 when the first wire 1821 and the second wire 1822 are enamel copper wires.

22 is a view for explaining a coil device according to another embodiment.

Referring to Fig. 22, a coil device according to another embodiment may include a plane coil arranged in a plurality of layers. More specifically, the plane coil may include a first coil 1920 disposed in the first layer and a second coil 1910 disposed in the second layer. The plane coil may include an insulating layer 1930. The insulating layer 1930 can be flexible and rigid. The insulating layer 1930 may be disposed between the first coil 1920 and the second coil 1910. The insulating layer 1930 may have a hole 1931 so that the first coil 1920 and the second coil 1920 can be connected to each other. In addition, the planar coil may include a first extension line 1921 or a second extension line 1911 to receive an AC signal or provide an AC signal. The first extension line 1921 may extend and be connected to the first coil 1920. The second extension line 1911 may extend and be connected to the second coil 1910. For example, the plane coil extends from the first extension line 1921 and turns a plurality of times from the outer region of the insulation layer 1931 toward the inner region of the insulation layer 1931 to arrange the first coil 1920, 1 coil 1920 through the hole 1931 and turn a plurality of times in the direction toward the outer region of the insulating layer 1930 from the inner region of the insulating layer 1930 to the second extended line 1911. [ Further, the plane coil may be arranged in three or more layers instead of two layers.

Comparing the coil device of FIG. 21 with the coil device of FIG. 22, it can be seen that the coil device comprising the plane coil arranged in the plurality of layers of FIG. 22 is thicker than the coil device comprising the plane coil of one layer of FIG. It can be thin. This is because the coil device of FIG. 21 has a thicker enamel copper wire than the one coil. Therefore, the coil device can be made thinner in its entire thickness by the plane coil arranged in plural layers.

23 is an exploded perspective view for explaining the coil device of Fig.

Referring to Fig. 23, the coil apparatus according to Fig. 22 may include a substrate 2060. Fig. The substrate 2060 may be a flexible substrate and may be a rigid substrate. In addition, the coil device may include a shielding member 2050. The shielding member 2050 may be disposed on the upper surface of the substrate 2060. The shielding member 2050 can guide the wireless power generated by the plane coils 2010, 2020, and 2030 disposed in the upper portion in the charging direction and protect various circuits disposed below from the electromagnetic field. Further, the coil device can fix the plane coils 2010, 2020, and 2030 to the shielding material 2050 by the adhesive 2040. Also, the coil device can be fixed by integrating the plane coils 2010, 2020, and 2030 with the shielding material 2050. In addition, the coil device may comprise a planar coil disposed in multiple layers of FIG. That is, the plane coil includes a first coil 2020 extending from the first extended line 2022, an insulating layer 2030 having the hole 2031 disposed therein, and a second coil 2010 extending from the second extended line 2011 .

24 is a view for explaining a coil device according to another embodiment.

Referring to FIG. 24, the coil device, which is another embodiment, may include a substrate 2250 and a shielding material 2240 disposed on the substrate 2250.

Still another embodiment, the coil device may include a plurality of coils. For example, the plurality of coils may include a first plane coil 2211 to a third plane coil 2213. Further, in order to perform uniform power transmission or power reception within a constant-sized charging area, at least one of the plurality of coils may be disposed in an overlapped manner. For example, the first plane coil 2211 and the second plane coil 2212 may be disposed on the first layer side by side at regular intervals on the shielding material 2240, and the third plane coil 2213 may be disposed on the first layer side And may be superposed on the second layer on the plane coil 2211 and the second plane coil 2212. An insulating layer 2220 may be disposed between the third plane coil 2213 and the first plane coil 2211 or between the third plane coil 2213 and the second plane coil 2212.

Still further, the coil device, which is another embodiment, may include an adhesive 2240 to secure a plurality of coils to the shield 2240. In the coil device, a plurality of coils and a car body 2240 may be integrally formed. In this case, the coil 2240 can be removed from the coil device.

Therefore, the embodiment can have a wider charging area by using a plurality of transmission or reception coils, thereby improving user convenience.

25 is a view for explaining three drive circuits including a full-bridge inverter in a wireless power transmitter including a plurality of coils according to an embodiment.

25, when three coils of a wireless power transmitter have different inductances, three drive circuits 2510 connected to respective coils and three capacitors including a capacitor for generating the same resonance frequency An LC resonance circuit 2520 is required.

Although the wireless power transmitter includes a plurality of coils, the resonant frequency that the wireless power transmitter generates to perform the power transmission should not depend on each of the transmit coils, and must conform to the standard resonant frequency supported by the wireless power transmitter.

The resonance frequency generated in the LC resonance circuit 2520 may vary depending on the inductance of the coil and the capacitance of the capacitor.

For example, the resonant frequency (fr) may be 100 KHz, and when the capacitance of the capacitor connected to the coil to generate the resonance frequency is 200 nF, if only one capacitor is used, all three coils are 12.5 uH. When the inductances of the three coils are different from each other, three capacitors having different capacitances corresponding to each other are required in order to generate a resonance frequency of 100 kHz. In addition, three drive circuits 2510 including an inverter for applying an AC voltage in each LC resonant circuit 2520 are also required.

26 is a view for explaining a wireless power transmitter including a plurality of coils and one drive circuit according to an embodiment.

26, if the inductances of the three coils of the wireless power transmitter are the same, the wireless power transmitter may include only one drive circuit 2610, and one drive circuit 2610 and three coils The switch 2630 can be controlled to connect the coil of the wireless power transmitter having the highest power transmission efficiency with the coil of the wireless power transmitter.

Compared with FIG. 25, the wireless power transmitter can reduce the area occupied by the components by using only one drive circuit 2610, thereby making it possible to miniaturize the wireless power transmitter itself and reduce the cost of raw materials required for manufacturing .

In one embodiment, the wireless power transmitter may use the signal strength indicator in the ping phase to calculate the power transfer efficiency between the three coils of the wireless power transmitter and the coils of the wireless power receiver.

Alternatively, the wireless power transmitter may calculate the coupling coefficient between the transmitting and receiving coils to select a coil of the wireless power transmitter having a high coupling coefficient.

Alternatively, the wireless power transmitter may calculate a Q factor to control the switch 2630 to identify the coil of the high power wireless power transmitter and connect it to the drive circuit 2610.

27 is a view for explaining a drive circuit including a full-bridge inverter according to an embodiment.

Referring to FIG. 27, a power transmitter included in a wireless power transmitter may generate a specific operating frequency for power transmission. The power transfer section may include an inverter 2710, an input power supply 2720, and an LC resonant circuit 2730.

The inverter 2710 can convert the voltage signal from the input power source and transmit it to the LC resonance circuit 2730. In one embodiment, the inverter 2710 may be a full-bridge inverter or a half-bridge inverter.

The power transfer section can use a full bridge inverter for higher output than the output by the half bridge inverter. The full bridge inverter can be applied to the LC resonance circuit 1280 by outputting a voltage two times higher than that of the half bridge inverter by using four switches in the form of adding two switches to the half bridge inverter.

28 is a view for explaining a plurality of switches for connecting any one of a plurality of coils of a wireless power transmitter with a drive circuit according to an embodiment.

28, the power transmission unit includes a drive circuit 2810 for converting an input voltage, a switch 2820 for connecting a drive circuit 2810 and an LC resonance circuit, a plurality of transmission coils 2830, a plurality of wireless power transmitters One capacitor 2840 connected in series with the coil of the switch 2820, and a control unit 2850 controlling the opening and closing of the switch 2820.

The control unit 2850 identifies the coils of the wireless power receiver among the plurality of coils 2830 of the wireless power transmitter and the coils of the wireless power transmitter with the highest power transmission efficiency and outputs the coils of the identified wireless power transmitter to the drive circuit 2810. [ Lt; RTI ID = 0.0 &gt; switch &lt; / RTI &gt;

The method according to the above-described embodiments may be implemented as a program to be executed by a computer and stored in a computer-readable recording medium. Examples of the computer-readable recording medium include a ROM, a RAM, a CD- , A floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet).

The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional program, code, and code segments for implementing the above-described method can be easily inferred by programmers in the technical field to which the embodiment belongs.

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 (25)

Board;
A shielding material disposed on the substrate; And
And a planar coil having a plurality of turns and arranged with a coil wire extending on the shielding material,
Wherein the coiled coil is spaced apart from the coiled coil. The method according to claim 1,
Wherein the plane coil is a twisted wire. The method according to claim 1,
Wherein the plane coil is formed by a pressing process. The method according to claim 1,
Wherein the plane coil is arranged in a circular spiral shape or a square spiral shape. The method according to claim 1,
Wherein the coil wire has a rectangular cross section. 6. The method of claim 5,
Wherein the coil lines are arranged on both upper surfaces of the coil. The method according to claim 6,
Wherein the driving coil is disposed such that the depth thereof increases as the thickness of the plane coil increases. The method according to claim 1,
Wherein the plane coil is plated on one surface. The method according to claim 1,
And the EMI shield is disposed on one side of the plane coil. The method according to claim 1,
And the plane coil is integrated with the shielding material. The method according to claim 1,
Wherein the plane coil is disposed in a plurality of layers. 12. The method of claim 11,
Wherein the plane coil has a first coil disposed in a first layer, a second coil disposed in a second layer,
And an insulating layer is disposed between the first coil and the second coil. 13. The method of claim 12,
Wherein the first coil and the second coil are connected to each other through a hole of the insulating layer. The method according to claim 1,
Wherein a plurality of the plane coils are provided,
Wherein at least one of the plurality of plane coils is overlapped. A coil device including a substrate, a shielding material disposed on the substrate, and a plane coil disposed on the shielding material; And
And a drive circuit connected to the plane coil,
Wherein the plane coil is extended by a plurality of turns with the coil wire extended, and the coil wires are spaced apart from each other. A coil device including a substrate, a shielding material disposed on the substrate, and a plane coil disposed on the shielding material; And
And a control circuit coupled to the plane coil,
Wherein the plane coil is extended by a plurality of turns with the coil wire extended, and the coil wires are spaced apart from each other. Forming a plane coil;
Disposing a shielding material on the substrate; And
And disposing a plane coil on the shielding material,
Wherein the plane coil has a coil line spaced from the coil line. 18. The method of claim 17,
Wherein the step of forming the plane coil includes the step of providing a flat plate made of a metal material. 19. The method of claim 18,
Wherein the step of forming the plane coil further comprises the step of forming the plane coil by pressing the flat plate. 18. The method of claim 17,
Wherein the step of forming the plane coil includes the step of providing a first flat plate made of a metal material. 21. The method of claim 20,
Wherein the step of forming the plane coil further comprises the step of plating the first flat plate or disposing an EMI shield to produce a second flat plate. 22. The method of claim 21,
Wherein the step of forming the plane coil further comprises the step of forming the plane coil by pressing the second flat plate. 18. The method of claim 17,
Wherein the plane coil is a twisted wire. 18. The method of claim 17,
Wherein the coil wire is disposed on both upper surfaces. 25. The method of claim 24,
Wherein the plane coil is disposed with an increased depth as the thickness of the plane coil increases.

Images