KR102325106B1 - The structure of the wireless antenna coil for the smart phone - Google Patents

Abstract

The present invention is provided with a wireless energy reception coil capable of receiving wireless power energy and a wireless data reception coil capable of receiving wireless data, wherein the wireless data reception coil is two or more, and a wireless energy reception coil and wireless data reception Each coil is provided with a connecting wire, the wireless energy receiving coil and the wireless data receiving coil are mounted on one multi-coil film, located inside the wireless energy receiving coil, the wireless data receiving coil is located outside, and the two wireless Since the thickness of the data receiving coil and the coil spacing are different, it is possible to mount at least three types of antenna coils using a small area in the area of a small smartphone, and to minimize the three or more types of antenna coils. to be able to control it.

Description

The structure of the wireless antenna coil for the smart phone

The present invention relates to a structure of a wireless antenna coil for a smartphone, and more particularly, in a smartphone equipped with both an antenna coil receiving power energy wirelessly and an antenna coil receiving data wirelessly, effectively mounting the antenna coils And it relates to the structure of a wireless antenna coil for a smartphone that provides a technical structure for controlling it.

In an electronic device, a wireless transmission and reception unit is provided and a technology for wireless charging is being developed. Recent mobile communication terminals have been developed in various forms, and accordingly, there have been as many different charging jacks as the various types of power chargers. Accordingly, the compatibility problem of chargers was highlighted, but these charging jacks were standardized as 24-pin charging jacks to solve the compatibility problem between chargers for users.

However, since charging is still performed through a wired cable between the charger and the device, it causes considerable inconvenience and inconvenience to users due to the limitation of the distance. In addition, when a plurality of terminals are charged with one charger, there is a problem in that the terminal may be damaged due to the inconvenience of manual attachment and detachment of the charger and the terminal jack and wear or damage of the connection part.

In addition, in addition to wireless charging, various types of data and information such as payment or information provision through a smartphone are also exchanged through short-distance communication. A general method for exchanging information in a short distance is NFC, which is a non-contact short-distance wireless communication module that uses a 13.56Mz frequency band as one of the electronic tags (RFID). . NFC is widely used not only for payment, but also for product information or travel information transmission for visitors in supermarkets and general stores, transportation, and access control locks.

Of course, the communication method for exchanging information in a short distance is not limited only to the NFC method, and there are inevitably several methods.

That is, various wireless charging methods and various short-distance communication methods exist, and according to the multifunctionalization of smartphones, it is possible to employ a wireless charging function as well as a short-range communication function of various methods. However, in doing so, a control algorithm of the structure of the component is needed to effectively control various antenna coils.

Of course, prior art 1 (Republic of Korea Patent No. 10-0928439) is provided to be positioned between the "first upper core (coil) and the second upper core, and the control unit receives a signal transmitted from the non-contact power receiver, the lower core , determining which core is received among the first upper core and the second upper core, and transmitting and controlling the power signal through the corresponding core in response to the determination result”,

In addition, Prior Art 2 (Republic of Korea Patent Registration 10-1279856) discloses "a wireless power receiving coil that receives power energy using non-contact magnetic induction, and a component that outputs the power energy received from the wireless power receiving coil at a predetermined voltage. In a receiver for a wireless charging system comprising: a sheet of ferrite sheet; an NFC coil coupled and installed in an outer region of the ferrite sheet; The ferrite sheet is coupled to the ferrite sheet in an electrically insulated state while maintaining a separation distance, and the data circuit path received through the NFC coil and the circuit path through which the power energy received through the wireless power receiving coil are transmitted are electrically The receiver for a wireless charging system, characterized in that the ferrite sheet, the NFC coil and the wireless power receiving coil are integrated and provided in a portable terminal that is separated from each other." present

However, the above patent does not propose a method of arrangement or components capable of controlling and optimizing antenna coils having different functions at once.

Therefore, there is a need to develop a wireless charging method having an optimal design condition while also having a complex function.

Prior art 1: Republic of Korea Patent Registration 10-0928439. Registration Date: November 18, 2009 Prior Art 2: Republic of Korea Patent Registration 10-1279856. Registration Date: June 24, 2013

An object of the present invention is to provide a wireless energy reception coil capable of receiving wireless power energy and a wireless data reception coil capable of receiving wireless data, wherein the wireless data reception coil is two or more, and a wireless energy reception coil and Each of the wireless data receiving coils is provided with a connection line, the wireless energy receiving coil and the wireless data receiving coil are mounted on one multi-coil film, located inside the wireless energy receiving coil, and the wireless data receiving coil located outside, the This is achieved because the thickness and coil spacing of the two wireless data receiving coils are different from each other.

In addition, the wireless energy receiving coil and the wireless data receiving coil are located separately from each other, but are mounted on one film, and the wireless antenna coil is an NFC coil and an authentication coil.

In addition, the ferrite film layer is formed by coating a magnetic layer, the heat dissipation film layer is formed by coating a heat dissipation layer, and the adhesive layer at the bottom of the heat dissipation film layer is a heat conductive adhesive layer.

On the other hand, the adhesive layer at the bottom of the ferrite film is a heat conductive adhesive layer, the lower case of the smartphone is provided with a connection terminal of the wireless energy receiving coil and the wireless data receiving coil.

The above object is provided with a wireless energy reception coil capable of receiving wireless power energy and a wireless data reception coil capable of receiving wireless data, a matching part and MSM are further provided, and each coil has the matching part, respectively connected, and the matching part is connected to the corresponding MSM, the wireless data receiving coil is two or more, and when wireless energy or wireless data is received, the corresponding matching part is matched, and the MSM connected with the matching matching part This is achieved by performing the algorithm.

And, when a wireless charging control command is executed or a matching t connected to the wireless energy receiving coil is matched, wireless charging information is transmitted, and the transmitted information is the remaining battery charge.

In addition, each MSM is provided with one.

On the other hand, when receiving wireless energy, if wireless data is received, the reception of wireless energy is terminated or the strength of wireless energy reception is reduced, or when wireless data of higher importance is received when receiving wireless data, the received data is reduced. It stops and receives high-priority wireless data.

together. The MSM is replaced with a smartphone main chip.

According to the present invention, at least three types of antenna coils can be mounted using a small area in the area of a small smartphone, and the three or more types of antenna coils can be controlled with the smallest component.

1 is a diagram of an embodiment showing an antenna coil of the present invention.
2 is a diagram of an embodiment showing characteristics of a wireless energy receiving coil and a wireless data receiving coil.
3 and 4 are diagrams of an embodiment showing a circuit for receiving wireless energy and a circuit for receiving wireless data.
5 to 8 are diagrams of an embodiment showing a method of disposing a multi-antenna coil of the present invention.
9 and 10 are diagrams of an embodiment showing another functional film layer provided in the wireless antenna coil.
11 and 12 are diagrams of an embodiment showing a method of minimizing a multi-coil film.
13 is a view of an embodiment showing a connection terminal mounted on the rear of the smartphone case.
14 is a diagram of another embodiment of the present invention in which a coil is provided.

Hereinafter, a design structure of a receiver for a wireless charging system according to an embodiment of the present invention will be described in detail.

That is, the following is merely illustrative of the principles of the present invention. Therefore, those skilled in the art will be able to devise various devices which, although not explicitly described or shown herein, embody the principles of the present invention and are included within the spirit and scope of the present invention.

Moreover, it is to be understood that all detailed description reciting specific embodiments, as well as principles, aspects, and embodiments of the present invention, are intended to cover structural and functional equivalents thereof.

In addition, when conventional technology is applied to the description of the present invention, a detailed description of the conventional technology may be omitted.

1 is a diagram of an embodiment showing an antenna coil of the present invention.

Although the substrate is not shown in the drawings, it is natural that the multi-coil of the present invention is provided on a flexible resin substrate or a normal substrate (eg, a PCB, plastic or metal substrate). As shown in the drawing, two wireless data receiving coils 51-1 and 51-2 capable of receiving data wirelessly are provided in the outer part, and the data receiving coils 51-1 and 51-2 are provided with wireless A wireless energy receiving coil 52 that can receive energy is provided.

In addition, in general, the largest and outermost wireless data receiving coil 51-1 may be an NFC coil, but if necessary, the wireless data receiving coil 51-1 located immediately inside may be an NFC coil. .

In addition, the antenna coils 52, 51-1, and 51-2 are provided in the form of a spiral coil by directly winding a coil of an electric wire such as copper, or a thin film (deposition or printing coating followed by an etching process) on a substrate. It is provided in the form of a coil in the form of a thin film formed through

Accordingly, in the present invention, the substrate may be a base substrate (PCB or a substrate such as a metal or resin) for coating and forming a loop coil, or a substrate for merely supporting the loop coil. At this time, it is natural that the substrate supporting the loop coil may be a simple substrate for fixing the spiral coil to a plate (a hard or flexible plate made of metal, resin, or resin). That is, it can be in the form of attaching the spiral coil to the substrate with a tape or an adhesive.

In addition, each of the coils is provided with lead wires 52a, 52b, 51-1a, and 51-2a, respectively, and connected to an external circuit to form an electric circuit.

2 is a diagram of an embodiment showing characteristics of a wireless energy receiving coil and a wireless data receiving coil.

In the present invention, a multi-coil board equipped with both a wireless energy reception coil and a wireless data reception coil is a diagram of an embodiment in which a smartphone is mounted, and two or more wireless data reception coils may exist.

In addition, the type and strength of the wireless electric field received by the wireless energy receiving coil is different from the type and strength of the wireless electric field received by the wireless data coil. Therefore, the thickness (W) of the wireless energy receiving coil becomes thicker than the thickness (W) of the wireless data receiving coil, the coil resistance must be low as much energy is received,

On the other hand, the number of turns T1, T2, and T3 of the wireless energy receiving coil 52 is also greater than the number of turns of the wireless data receiving coil.

In addition, the thickness W of the first wireless data reception coil 51-1 among the wireless data reception coils should be designed to be different from the thickness W of the second wireless data reception coil 51-2, and the number of turns is designed differently. Also, the gap (G) between the coil and the coil should be designed differently. This is because the type and strength of the electric field to be received by the first wireless data coil are different from the type and strength of the electric field to be received by the second wireless data coil.

On the other hand, the present invention provides a multi-coil, if necessary, a Zigbee communication module that exchanges signals with each other, a control unit that controls each signal and component according to a predetermined program, and a voltage or power to the final mobile phone A converter to match the voltage of the battery, etc. is provided. In this case, the converter may serve to increase or decrease the voltage depending on the situation, and may increase or decrease the amount of power in the same manner.

On the other hand, although the figure is drawn as having only one wireless energy receiving coil 52 in FIG. 1, two types of wireless energy receiving coils may also be provided. If so, two matching parts related to the wireless energy receiving coil are also required, that is, WPC (one of the wireless energy transfer methods) Matching Part, KTP (one of the wireless energy transfer methods) Matching Part are provided respectively. That is, there are two wireless energy receiving coils, a WPC type coil and a KTP type coil, and the matching part is to select one of the two methods to receive power energy.

That is, the function of the matching part is to consult each coil inductance to match each inductance.

3 and 4 are diagrams of an embodiment showing a circuit for receiving wireless energy and a circuit for receiving wireless data.

3 is a view showing a receiving unit, a control unit 10 that controls each signal and component according to a predetermined program, and a charging circuit for charging the voltage or power to match the final battery voltage of the mobile phone 100 ( 12) is provided. In addition, a rectifier 10a for converting alternating current to direct current is also provided.

On the other hand, a feature of the present invention is provided with a sensor 13 for detecting a frequency value of the coil, etc. In this case, it is not necessarily limited to detecting the frequency value. Current, impedance, capacitance, voltage, etc. can also be measured. And, when the MCU 10 detects the frequency value of the coil sensed by the sensor 13, a charging method ( For example, KTP method or WPC method) can be selected.

In the present invention, a coil suitable for a charging method is selected by the switching element (S/W) 14 . In addition, the wireless charging receiver system may be provided with other components in addition to the components shown in FIG. 3, but those not directly related to the description of the present invention are omitted.

Actually, the charging WPC method and the magnetic resonance method have different distances (the distance between the transmitting coil and the receiving coil) that are optimal charging conditions. Therefore, according to the present invention, the optimal charging method is automatically selected according to the distance between the transmitting coil and the receiving coil. In this case, although it may be controlled through the switching element 14 , it goes without saying that the MCU 10 may directly perform the switching control.

4 is a diagram of an embodiment showing circuits of a wireless data receiving coil and a wireless energy receiving coil.

In general, the NFC coil 51 ( 51-1 or 51-2 in FIG. 1 corresponds to.) maintains an on state. Maintaining the on state means that the module for controlling the NFC coil 51 is always connected.

However, when the wireless charging receiving coil 52 transmits wireless power receiving energy, the NFC coil remains off. At this time, maintaining the off state means that the connection between the NFC coil and the module controlling the NFC coil is blocked.

A process in which the power energy received from the coil 52 is supplied to the battery 60 of the portable terminal is similar to the previous embodiment. However, data received through the NFC coil is transmitted to the main control unit (Main CPU) 110 of the smart phone (portable terminal) through a separate path.

As shown in the drawing, a receiving coil 52 and an NFC coil 51 are provided, and the two coils are circuitly separated. Accordingly, the controller 10 for controlling the wireless power receiver and the NFC module 20 for controlling the NFC coil 51 are separately provided. In this case, being provided separately means that the functions are separated. Therefore, the control unit 10 and the NFC module 20 may be separate components, and functions may be distinguished from one component.

Therefore, the precise meaning of being divided into two paths is that the connecting line from the coil 51 to the controller 10 and the connecting line from the NFC coil 51 to the NFC module 20 are separated from each other. The NFC module 20 means an NFC Transmission module, and the NFC Transmission module includes an analog interface, an R/F level interface, a Card Mode Detecter, etc., and data between terminals at a close distance of 10cm function to transmit

In general, NFC is a non-contact short-distance wireless communication module that uses a 13.56Mz frequency band as one of the RFID tags, and refers to a technology for transmitting data between terminals at a short distance of 10 cm. NFC is widely used not only for payment, but also for product information or travel information transmission for visitors in supermarkets and general stores, transportation, and access control locks.

And, it further includes a switch 14, the switch can block the connection by the control of the control unit 10 for controlling the coil, and when the connection is blocked by the switch 14, the function of the NFC coil (51) will be stopped.

As a result, when the control unit 10 controls the wireless power reception coil to receive wireless power reception energy, the control unit 10 blocks the switch to stop the NFC function.

On the other hand, the method of stopping the NFC function when receiving wireless power reception energy may be possible other than the method presented in the present invention. The most important thing is that when the control unit 10 controls the receiving coil 51, it performs a control command to stop the NFC function.

However, it goes without saying that the smartphone Main CPU 110 presented in the embodiment of FIG. 7 of the present invention can perform the above switching control, and that the MSM presented in FIG. 6 of the present invention can perform the above switching control. do.

5 to 8 are diagrams of an embodiment showing a method of disposing a multi-antenna coil of the present invention.

5 is a diagram of an embodiment in which the wireless energy reception coil is inside and the wireless data reception coil is provided outside the wireless energy reception coil.

5(A) is a diagram of two wireless reception energy coils 52-1 and 52-2, and a wireless data reception coil provided outside the wireless reception energy coils 52-1 and 52-2 ( 51-1) (51-2) is also a diagram of an embodiment in the case of two,

5(B) and 5(C) are two wireless reception energy coils 52-1 and 52-2, and the wireless reception energy coils 52-1 and 52-2 are outside. It is a diagram of an embodiment in the case where the provided wireless data receiving coils 51-1 and 51-2 are one. In this case, the one wireless data receiving coil 51-1 and 51-2 may be an NFC coil or another data communication coil capable of authentication or payment.

On the other hand, Figure 5 (D) is a diagram of an embodiment in the case of a single wireless energy receiving coil (52-1). In addition, even when there is one wireless reception energy coil 52-1, two wireless data reception coils 51-1 and 51-2 may be provided outside the wireless reception energy coil 52-1. have. On the other hand, when there is one wireless reception energy coil 52-1, only one wireless data reception coil 51-1 and 51-2 may be provided outside the wireless reception energy coil 52-1. have. In this case, the one wireless data receiving coil 51-1 and 51-2 may be an NFC coil or another data communication coil capable of authentication or payment.

Meanwhile, FIG. 5 shows that several wireless antenna coils are provided, but the wireless antenna coils are provided on one substrate 55 .

6 is a diagram of an embodiment showing that the wireless data reception coils 51-1 and 51-2 are provided separately from the wireless energy reception coil 52. As shown in FIG. At this time, at this time, there may be only one wireless data receiving coil 51-1 and 51-2, and the wireless data receiving coils 51-1 and 51-2 may be smaller in size than the wireless energy receiving coil 52. It may or may not be similar. In addition, although a separate illustration is omitted in the embodiment of FIG. 6 , there may be two wireless energy receiving coils 52 as in the embodiment of FIG. 5 .

7 shows one wireless data reception coil 51-1 and 51-2 provided outside the wireless energy reception coil 52, and another wireless data reception coil 51-1 and 51-2 at a separate location. -2) is a drawing of an embodiment showing that

At this time, the coil located outside the wireless energy receiving coil 52 may be an NFC coil, or may be another data communication coil capable of authentication or payment.

Of course, even in the case of FIG. 7 , there may be two wireless energy receiving coils 52 .

8 shows a case in which wireless data reception coils 51-1 and 51-2 are provided separately from the wireless energy reception coil 52, and there are two wireless data reception coils 51-1 and 51-2. It is a drawing of an embodiment.

In addition, the two wireless data receiving coils 51-1 and 51-2 are provided with one inside and the other outside. Meanwhile, the wireless data receiving coil provided inside may be an NFC coil, and the wireless data receiving coil provided outside may be another data communication coil capable of authentication or payment, and conversely, the wireless data receiving coil provided outside is NFC. It is a coil, and the wireless data receiving coil provided therein may be another data communication coil capable of authentication or payment.

9 and 10 are diagrams of an embodiment showing another functional film layer provided in the wireless antenna coil.

As in FIG. 9 , a film 56 having ferrite (magnetic layer) layers 56a and 56b formed on top of the film 55 provided with the wireless antenna coils 52 and 51 is provided, and also a heat dissipation film thereon. A layered film 57 is provided.

In addition, the types of the ferrite layer 56a located in the portion where the wireless energy reception coil is located and the ferrite layer where the wireless data reception coil 56b is located may be different from each other.

The ferrite sheet may also have an insulating effect, but is a sheet-shaped component provided to minimize the influence of a magnetic field between coils or between coils and components. Accordingly, the ferrite sheet is positioned between the coil and the mobile phone component.

Therefore, if the multi-antenna coil board 55 of the present invention is attached to the back of the smartphone case, the ferrite sheet is located on the top, but on the contrary, the multi-antenna coil board 55 is attached to the smartphone parts such as a battery. In this case, the ferrite sheet is attached to the bottom.

Therefore, the embodiment of FIG. 9 is a case attached to the rear of the smartphone case, and the rear of the smartphone case is located under FIG. 9 .

As the ferrite sheet, a silicon steel sheet is used, but conventionally commercially available materials such as manganese, ferrite, permalloy, permandure, metal glass, and powdered iron may be used. In addition, zinc or the like may be used in the form of an absorber.

Since the ferrite sheet is provided in the boundary region between the coil and the coil, the influence of the magnetic field between the wireless energy receiving coil and the wireless data receiving coil is reduced.

10 is a view of an embodiment showing the cross-sectional structure of a ferrite film and a heat dissipation film,

In order to be provided in a smartphone, it is important to make the thickness of each layer thin, and the embodiment of Fig. 10 is a view showing an embodiment for thinning the thickness of each layer,

In (A) of FIG. 10, the heat dissipation layer is formed by coating the heat dissipation layer 57a on the heat dissipation film 57, and a heat conductive adhesive layer 57b is formed under the heat dissipation film 57 for adhesion with another layer. In addition, the ferrite sheet forms ferrite layers 56a and 56b on the ferrite film 56 . At this time, in order to make the overall thickness thin, the ferrite layer is coated to about 20 - 100 μm. And a heat conductive adhesive layer (56c) dl is formed under the ferrite film (56),

At this time, the material components and properties of the heat dissipation layer 57a and the heat conductive adhesive layers 57b and 56c of the present invention are as follows.

The heat dissipation layer 57a includes at least one material selected from porous magnesium hydroxide, magnesia, silicon dioxide, zirconium and silicate compounds having excellent electrical insulation and thermal conductivity, graphite having excellent electrical and thermal conductivity, carbon nanotubes, and graphene. an organic-inorganic composition comprising an inorganic material and an inorganic pigment; an organic polymer material selected from the group consisting of polyvinyl alcohol, methyl cellulose, ethyl cellulose, methyl nitro cellulose, ethyl nitro cellulose, an acrylic-urethane copolymer, an epoxy-urethane copolymer, and a water-soluble urethane resin; It consists of an organic-inorganic hybrid composition for a heat radiation sheet including.

In addition, the binder constituting the heat radiation layer 57a is not limited as long as it has adhesive properties, and may be selected from natural resins or synthetic resins. The binder may be, for example, one or more selected from resins such as acrylic, epoxy, urethane, and urea.

In addition, the heat radiation layer 57a is not particularly limited, but assuming that 100 g (gram) of the binder is used, a thermally conductive composition containing about 5 to 200 g of a thermally conductive filler may be coated and formed. In addition, the thermally conductive composition for forming the thermal radiation layer 57a, in addition to the thermally conductive filler and binder, if necessary, a photoinitiator, a curing agent, a dispersant, a solvent, an antioxidant, an antifoaming agent, a pigment, a brightener, a flame retardant, a surface smoothing agent, etc. more may include A general thin film coating method may be used for coating the thermally conductive composition, and a gravure coating method may also be used.

In addition, the heat radiation layer 10 may have a thickness of 5 μm to 100 μm. If the thickness is too low as less than 1 μm, scratching by external force may occur and heat dissipation efficiency may be reduced. . Preferably, it may have a thickness of 3 µm to 20 µm.

For example, the organic-inorganic hybrid composition of the heat radiation layer contains preferably 60 to 80 wt% of a silicate compound, 0.5 to 5.0 wt% of carbon nanotubes, 0.5 to 5.0 wt% of graphene among inorganic fillers having a large amount of ultrafine pores. , 1 to 10% by weight of inorganic pigment, 5.0 to 10% by weight of ethyl cellulose among organic materials, 5.0 to 10% by weight of ethylnitrocellulose, and 0.5 to 1.0% by weight of a dispersion stabilizer.

As the dispersion stabilizer, one selected from polyacrylate, bentonite, fumed silica, and zeolite is used.

As the inorganic pigment, one of zinc-based, manganese-based, magnesium-based, titanium-based, and ferric-based oxides may be selected and used.

In addition, the organic-inorganic hybrid composition for a heat radiation layer for a thin film heat radiation sheet is coated on one or both mat surfaces of the heat conductive layer by a treatment method by comma roll coating, doctor braid, and gravure method to form a large area uniform heat radiation layer It is possible to mass-produce heat-conducting and heat-radiating thin film sheets.

In addition, the heat radiation layer 57a includes a filler, and the filler may have a particle size of 0.1 nanometers (nm) to 5 micrometers (㎛) in a particulate form.

The heat conductive adhesive layer 57b is a mixture of an adhesive resin selected from acrylic, silicone, rubber, acrylic-urethane copolymer, and polyurethane, and at least one selected from aluminum, silicic acid, and zinc oxide for excellent heat conduction properties. It is composed of a composition and a resin, and serves to attach and fix the heat radiation sheet to the heat generating element and the heat generating part without an air gap, and to effectively transfer heat vertically to the heat conductive layer in contact with the polymer layer.

The adhesive layers 57b and 56c may be composed of adhesives commonly used in the art, and may be selected from, for example, acrylic, urethane, and silicone adhesives. Preferably, it may be selected from acrylic pressure-sensitive adhesives. In addition, the adhesive layer 30 may also preferably have heat dissipation. For example, the adhesive layers 57b and 56c may be formed by coating a thermally conductive adhesive including an adhesive and a thermally conductive filler.

At this time, the type of the thermally conductive filler included in the adhesive layers 57b and 56c is not limited as long as it has thermal conductivity. The thermally conductive filler may have a particle size of 0.1 nanometers (nm) to 5 micrometers (μm) in a particulate form. The thermally conductive filler may use a metal, an inorganic material, a carbon material, or a mixture thereof. The thermally conductive filler is specifically aluminum (Al), nickel (Ni), copper (Cu), tin (Sn), zinc (Zn), tungsten (W), iron (Fe), silver (Ag), gold (Au) metal powders such as; calcium carbonate (CaCO3), aluminum oxide (Al2O3), aluminum hydroxide (Al(OH)3), silicon carbide (SiC); inorganic powders such as boron nitride (BN) and aluminum nitride (AlN); In addition, at least one selected from organic powders such as graphite, graphene, carbon nanotubes (CNT) and carbon nanofibers (CNF) may be used as the carbon material. The thermally conductive filler preferably includes one or more carbon materials selected from the group consisting of graphite, graphene, carbon nanotubes (CNT) and carbon nanofibers (CNF). These thermally conductive fillers may be mixed in an appropriate amount in a range that does not reduce the adhesive force of the pressure-sensitive adhesive.

In addition, the pressure-sensitive adhesive layers 57b and 56c preferably have a thickness in the range of 3 to 60 μm. When the thickness of the pressure-sensitive adhesive layers 57b and 56c is less than 3 μm, the adhesive force may decrease, and when it exceeds 60 μm, the heat dissipation effect may be deteriorated. The most optimal thickness is 10 - 20 μm.

FIG. 10B is a diagram of another embodiment, and is an embodiment of a method for reducing the overall thickness. That is, it is a method of directly forming the heat dissipation layer 57a on the ferrite sheet layer without separately providing the heat dissipation film 57 and the heat conductive adhesive layer 57b. This is made possible by coating a heat dissipation layer on the ferrite layers 56a and 56b.

11 and 12 are diagrams of an embodiment showing a method of minimizing a multi-coil film.

As shown in FIG. 11, in the present invention, two wireless data receiving coils 51-1 and 51-2 are provided, and one wireless energy receiving coil 52 is also provided, but the wireless energy receiving coil is also 2 may be provided, and each coil must be provided with lead wires 52a-1, 52a-2, 51-1a, and 51-2a, respectively, so that the multi-coil film 55 has a multi-layered structure. do. Therefore, it is necessary to minimize the layer structure to reduce the thickness as well as achieve cost reduction.

In the present invention, two wireless data receiving coils 51-1 and 51-2 are provided in the multi-coil film 55a below, and a wireless energy receiving coil 52 is provided, and the wireless data receiving coil 52 is located at the outermost part. Only the lead wire 51-1a of the coil 51-1 is provided.

In addition, in the upper multi-coil film 55b, the remaining leader lines 52a-1, 52a-2, 51-1a, and 51 except for the leader lines 51-1a located in the multi-coil film 55a below. -2a) are all provided. In addition, a method in which the lower multi-coil film 55a and the upper multi-coil film 55b are electrically connected is possible by making a hole.

12 is a cross-sectional structure, and adhesive layers 52c and 52e are provided on the lower portion of the multi-coil film 55b at the top and the multi-coil film 55a at the bottom, and as in the embodiment of FIGS. 10 and 11 , thermally conductive adhesive A normal adhesive is used as it is, not a layer.

In addition, an insulating film may be used instead of the multi-coil film 55b at the top. That is, after the insulating film is formed on the multi-coil film 55a below in which the coils and the leader wire are formed in FIG. 12 , the leader wire provided in the multi-coil film layer 55b in the upper part of FIG. 11 can be formed.

13 is a view of an embodiment showing a connection terminal mounted on the rear of the smartphone case.

In the present invention, two wireless data receiving coils 51-1 and 51-2 are provided, and one or more wireless energy receiving coils 52 may be provided, and a multi-coil film having the coils ( 55) is most effective when it is attached to the back 101 of the smartphone case. In this case, a terminal coupled to a terminal of the multi-coil film 55 (not shown in the present invention, but a connection terminal is provided at the connected end) is provided. At this time, both the terminals of the wire data receiving coils 51-1 and 51-2 and the terminals 102a of the wireless energy receiving coil 52 are provided. And a connection line 102 connected to the terminal and the circuit of the main body of the smartphone is provided.

14 is a diagram of another embodiment of the present invention in which a coil is provided.

The lower the resistance of the wireless energy receiving coil 52 is, the more effective it is, but there is a limit to lowering the resistance of the wireless energy receiving coil 52 due to the characteristics of making the thickness thin.

Therefore, the smartphone rear case 101 is provided with a coil groove 101a, and the wireless energy receiving coil 52 is also provided in the coil groove 101a, so that the thickness of the wireless energy receiving coil 52 is thickened. Therefore, the resistance value of the wireless energy receiving coil 52 can also be lowered. However, there is no problem even if the wireless data receiving coil is filmed and mounted as it is. Even at this time, the position of each coil follows the embodiment of FIGS. 1 and 5 to 8 .

51: NFC coil 52, 53: wireless charging coil (or antenna)
59: ferrite sheet 110b: NFC module
51: wireless data receiving coil 51-1: first wireless data receiving coil
51-1: second wireless data receiving coil 52: wireless energy receiving coil
52-1: first wireless energy receiving coil 102: terminal
52-2: second wireless energy receiving coil 101: rear case
102a: terminal connection line 56: magnetic material coating sheet
56a: first magnetic material layer 56b: second magnetic material layer
57: heat dissipation layer coating sheet 57a: heat dissipation layer

Claims (8)

a wireless energy receiving coil configured to receive wireless power energy;
a plurality of wireless data receiving coils configured to receive wireless data; and
Including one multi-coil film in which the wireless energy reception coil and the plurality of wireless data reception coils are located,
Each of the wireless energy reception coil and the plurality of wireless data reception coils includes a lead wire,
The wireless energy receiving coil is surrounded by the plurality of wireless data receiving coils, and the thickness and coil spacing of the plurality of wireless data receiving coils are different from each other.
The method of claim 1,
The wireless energy receiving coil and the wireless data receiving coil are located separately from each other, but the structure of a wireless antenna coil for a smartphone mounted on one film.
The method of claim 1,
The plurality of wireless antenna coils are a structure of a wireless antenna coil for a smartphone including a first wireless data reception coil that is an NFC coil and a second wireless data reception coil that is a coil for authentication.
According to claim 1,
a ferrite film layer disposed on the multi-coil film; and
The structure of the wireless antenna coil for a smartphone further comprising a heat dissipation film layer disposed on the ferrite film layer.
5. The method of claim 4,
The structure of the wireless antenna coil for a smartphone further comprising a magnetic layer formed by coating the ferrite film layer, and a heat dissipation layer formed by coating the heat dissipation film layer.
[Claim 5] The structure of claim 4, further comprising a heat-conducting adhesive layer located under the heat dissipation film layer.
[Claim 5] The structure of claim 4, further comprising a thermally conductive adhesive layer located under the ferrite film layer.
According to claim 1, wherein the multi-coil film, the structure of the wireless antenna coil for a smartphone configured to be attached to the lower case of the smartphone.

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