KR101646173B1 - Shielding unit for a wireless charging receiver module of a PMA wireless charging type and a wireless charging receiver module having the same - Google Patents

Shielding unit for a wireless charging receiver module of a PMA wireless charging type and a wireless charging receiver module having the same Download PDF

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Publication number
KR101646173B1
KR101646173B1 KR1020150102533A KR20150102533A KR101646173B1 KR 101646173 B1 KR101646173 B1 KR 101646173B1 KR 1020150102533 A KR1020150102533 A KR 1020150102533A KR 20150102533 A KR20150102533 A KR 20150102533A KR 101646173 B1 KR101646173 B1 KR 101646173B1
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South Korea
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wireless power
attractor
receiving module
power receiving
magnetic
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KR1020150102533A
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Korean (ko)
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KR20160086248A (en
Inventor
장길재
이동훈
장민식
김기철
박종호
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주식회사 아모센스
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    • H02J7/025—
    • H02J17/00—
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

There is provided a shielding unit for a PMA wireless charging type wireless power receiving module and a wireless power receiving module having the shielding unit. A shielding unit for a PMA wireless charging type wireless power receiving module according to an embodiment of the present invention includes a magnetic shielding sheet for shielding a magnetic field generated by a radio signal induced in an antenna of a wireless power receiving module; A part of the magnetic force lines generated in the permanent magnet provided in the wireless power transmission module is induced to change the path of the magnetic flux so as to satisfy the operation start condition of the wireless power transmission module, An attractor for inducing a change; And an attractor accommodating portion provided on the magnetic shielding sheet to accommodate the thickness of the attractor and to secure the thickness of the attractor, wherein the attractor accommodating portion includes an inner center portion And the total thickness of the attractor is less than or equal to the total thickness of the wireless power receiving module. Accordingly, even if the thickness of the wireless power receiving module is reduced, it is possible to use an attractor having a sufficient thickness to obtain a stable operating voltage value, thereby realizing an ultra-thin wireless power receiving module, It is possible to increase the design freedom of the wireless power receiving module.

Description

Technical Field [0001] The present invention relates to a shielding unit for a PMA wireless charging type wireless power receiving module and a wireless power receiving module having the same,

More particularly, the present invention relates to a shielding unit for a PMA wireless charging type wireless power receiving module and a wireless power receiving module having the shielding unit.

Recently, various functions such as RFID (Radio Frequency Identification), short range wireless communication (NFC), wireless charging (wireless charging) and interactive pen tablet have been added to portable terminals including mobile phones and tablet PCs.

NFC is a non-contact type short-range wireless communication module that uses 13.56MHz frequency band as one of RFID tags, and it is a technology to transmit data between terminals at a distance of 10cm. NFC is widely used not only for mobile payments, but also for transferring travel information, transportation, and access control locks for goods information and visitors in supermarkets and general shops, as well as for file transfer.

In addition, recently announced by Google, 'Android Beam' included in the smart phone is a near-field wireless communication (NFC) -based short distance information transmission and reception function that not only allows mobile payment but also photo, business card, file, map, To other phones.

Meanwhile, the portable terminal has a wireless charging function for wirelessly charging a built-in battery. The wireless charging includes a wireless power receiving module built in the portable terminal, a wireless power transmitting module for supplying power to the wireless power receiving module, Module.

In addition, the wireless charging may be classified into a magnetic induction type and a self-resonance type, and may be classified into a PMA type and a Qi type depending on a method of detecting a wireless power receiving module accessing the wireless power transmitting module.

The PMA wireless charging scheme controls the operation of the wireless power transmission module by detecting the approach of the wireless power receiving module using the permanent magnet and the hall sensor, and the concept thereof is schematically shown in FIG.

1, a permanent magnet 14 and a hall sensor 12 are installed in a wireless power transmission module 10 and a wireless power reception module 20 is provided with a so- And a magnetic body called a tractor 22 is attached.

A magnetic force line is generated from the permanent magnet 14 when the wireless power receiving module 20 approaches the wireless power transmitting module 10 and a portion of these lines of force is changed by the attractor 22 When the difference between the voltage values becomes equal to or greater than a predetermined value, the wireless power receiving module 20 recognizes that the wireless power receiving module 20 has approached the wireless power transmitting module 10, do.

In recent years, the thickness of the wireless power receiving module 20 incorporated in the portable terminal has been reduced, and the thickness of the wireless power receiving module 20 has been reduced to 0.6 mm or less, or even 0.3 mm or less I faced a problem that I had to design. When the thickness of the wireless power receiving module is designed to be 0.6 mm or less, or even 0.3 mm or less, the attractor 22 is attached directly to one side of the shielding sheet 24, There is a problem that it is difficult to increase the thickness.

There is no problem in that the attractor exhibits a function of changing the path of the magnetic force lines of the permanent magnets 14 so that the difference in the operating voltage value in the hall sensor is detected to be more than a predetermined value as the thickness or the area of the attractor increases. The size and the thickness of the wireless power receiving module can not be increased due to limitation of the structure and the shape of the wireless power receiving module. Therefore, the operating voltage value required in the PMA wireless charging method can not be stably detected.

For example, when the thickness of the wireless power receiving module 20 is designed to be 0.6 mm or less, or even 0.3 mm or less, the thickness of the attractor in the current wireless power receiving module structure can be increased to about 150 탆 or more And thus the selection range of the magnetic body constituting the attractor is very limited, which makes it difficult to manufacture the wireless power receiving module, and it may be difficult to realize the characteristics.

That is, in the PMA wireless charging system, in order to detect the approach of the wireless power receiving module, the difference in the voltage value at the hall sensor must be detected to a certain level or more. When the attractor has a thickness of about 150 mu m, The difference in the voltage value of the sensor is far below the standard operating voltage value, so that the wireless charging can not be performed due to the failure of sensing the approach of the wireless power receiving module.

KR 10-1188808 B

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a wireless power receiving module capable of detecting a stable operating voltage value required in a PMA wireless charging system, even if the wireless power receiving module is designed to have a thickness of 0.6 mm or less, And an object of the present invention is to provide a shielding unit for a PMA wireless charging type wireless power receiving module that can secure a sufficient thickness of the shielding unit.

It is another object of the present invention to provide a shielding unit for a PMA wireless charging type wireless power receiving module which can reduce the assembling process of the wireless power receiving module by integrally forming the attractor with the shielding sheet .

It is a further object of the present invention to provide a wireless power receiving module having a shielding unit as described above or a structural improvement capable of having an attactor of the same thickness as the overall thickness of the wireless power receiving module to achieve a thickness of 0.6 mm or less, The present invention provides a PMA wireless charging method wireless power receiving module that can stably satisfy or satisfy all the conditions and characteristics required in the PMA wireless charging system.

According to an aspect of the present invention, there is provided a shielding unit for a PMA wireless charging type wireless power receiving module, including a magnetic shielding sheet for shielding a magnetic field generated by a radio signal induced in an antenna of a wireless power receiving module, ; A part of the magnetic force lines generated in the permanent magnet provided in the wireless power transmission module is induced to change the path of the magnetic flux so as to satisfy the operation start condition of the wireless power transmission module, An attractor for inducing a change; And an attractor accommodating portion provided on the magnetic shielding sheet to accommodate the thickness of the attractor and to secure the thickness of the attractor, wherein the attractor accommodating portion includes an inner center portion And the total thickness of the attractor is formed to be equal to the total thickness of the wireless power receiving module.

Here, the attractor may be formed to have the same size as the center space of the inner antenna pattern of the wireless power receiving module.

Further, the attractor may be provided with a magnetic substance of a thin plate.

Further, the attractor may be constituted by stacking at least five amorphous ribbon layers.

The magnetic material may be any one of silicon steel, amorphous alloy, ferrite, permalloy or a polymer.

In addition, the magnetic shielding sheet may include at least three layers of amorphous ribbon layers.

In addition, the magnetic shield sheet may include at least two layers of amorphous ribbon layers and at least one layer of ferrite layers.

In addition, the total thickness of the wireless power receiving module may be 0.15 mm to 0.6 mm.

Also, the total thickness of the wireless power receiving module may be 0.3 mm.

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In addition, the attractor receiving portion may be formed as a through hole penetrating the magnetic shielding sheet. In this case, the magnetic shield sheet may be provided with a sealing sheet covering the through-hole.

According to another aspect of the present invention, there is provided a PMA wireless charging type wireless power receiving module including: an antenna unit having at least one antenna; A magnetic shielding sheet for shielding a magnetic field generated by a radio signal induced in the antenna unit; And a magnetic flux shielding sheet disposed between the antenna unit and the magnetic shielding sheet to induce a part of the magnetic force lines generated in the permanent magnet provided in the wireless power transmission module to change the path of the magnetic flux, An attractor for inducing a voltage value change in a hall sensor provided in a transmitting module; And an attractor receiving portion provided on at least one of or both of the magnetic shield sheet and the antenna unit so as to receive the thickness of the attractor and secure the thickness of the attractor, And the total thickness of the attractor is equal to the total thickness of the wireless power receiving module.

Here, the antenna unit may be a combo type including at least two antenna patterns of a wireless charging antenna pattern, an MST antenna pattern, and an NFC antenna pattern.

Further, the attractor may be integrated with the antenna unit or the magnetic shielding sheet.

In addition, the attractor receiving portion may be provided on only one side of the magnetic shielding sheet or on only one side of the antenna unit.

The attractor receiving portion may be provided on one surface of the magnetic shielding sheet facing each other and on one surface of the antenna unit.

In addition, the attractor receiving portion may be formed as a receiving groove which is recessed inwardly from one surface of at least one of the one surface of the magnetic shield sheet or one surface of the antenna unit.

In addition, the attractor receiving portion may be formed as a through hole penetrating through at least one of the magnetic shield sheet or the antenna unit. In this case, at least one surface of the magnetic shield sheet or one surface of the antenna unit may be provided with a sealing sheet covering the through-hole.

In the meantime, the present invention provides a wirelessly chargeable portable terminal, wherein the PMA wireless charging type wireless power receiving module is installed in a rear case or a back cover of the portable terminal.

In addition, the present invention provides a PMA wireless charging type wireless power receiving module built in a portable terminal as described above; And a wireless power transmission module that operates when the wireless power receiving module approaches or contacts within a predetermined distance to supply power to the wireless power receiving module.

According to the shielding unit of the present invention, when a part of the attractor changing the path of the magnetic flux by inducing a part of the magnetic force lines generated in the permanent magnet when approaching the wireless power transmission module is inserted through the attractor accommodating portion of the magnetic shielding sheet It is possible to use an attractor having a sufficient thickness without increasing the overall thickness of the wireless power receiving module so that the overall thickness of the wireless power receiving module is reduced to a thickness of, for example, 0.6 mm or less, It can be stably implemented in a state satisfying all the conditions and characteristics required by the wireless power receiving module.

Further, according to the shielding unit of the present invention, since the shielding sheet and the attractor are integrated into one shielding unit part, the wireless power receiving module can be manufactured by a simplified process of directly coupling the shielding unit thus configured with the antenna unit The manufacturing cost can be reduced due to the simplification of the assembling process.

According to the wireless power receiving module of the present invention, when a part or all of the thickness of the attractor that changes the path of the magnetic flux by inducing a part of the magnetic force lines generated in the permanent magnet when approaching the wireless power transmission module, It is possible to use a sufficient thickness of the attractor without the need to increase the overall thickness of the wireless power receiving module so that the overall thickness of the wireless power receiving module is less than 0.6 mm, It is possible to implement a wireless power receiving module that satisfies all the conditions and characteristics required by the PMA wireless charging system, and thus it is advantageous in that it can be applied stably and efficiently to a lightweight and compact mobile terminal.

Further, according to the present invention, since the thickness of the attractor can be formed to the same thickness as the total thickness of the wireless power receiving module, the selection range of the magnetic material constituting the attractor is wide, The selection of the magnetic material is very limited. However, according to the present invention, since the thickness of the attractor can be sufficiently secured, various kinds of oily materials can be selected, And the design freedom is high.

1 is a view for explaining a concept of approach detection of a wireless power receiving module for a wireless power transmitting module in a general PMA wireless charging type charging system,
2 is a perspective view schematically showing a shielding unit according to an embodiment of the present invention and a PMA wireless charging type wireless power receiving module having the same,
Fig. 3 is a sectional view of Fig. 2,
4 is an enlarged cross-sectional view schematically showing a laminated structure of a shielding sheet of a shielding unit according to an embodiment of the present invention, in which a) is composed only of an amorphous ribbon layer and b) is composed of an amorphous ribbon layer and a ferrite layer Fig.
5 is a diagram illustrating various aspects of an attractor receiving portion in a wireless power receiving module according to an embodiment of the present invention;
6 is a view showing another form of an attractor receiving portion and an attractor in a wireless power receiving module according to an embodiment of the present invention;
FIG. 7 is a view showing the arrangement relationship between a first portion and a second portion in an attractor according to an embodiment of the present invention;
FIG. 8 is a schematic view corresponding to FIG. 1 for explaining the approach detection concept of a wireless power receiving module for a wireless power transmitting module in a PMA wireless charging type charging system employing a wireless power receiving module according to an embodiment of the present invention; And,
9 is a perspective view showing a state in which a PMA wireless charging type wireless power receiving module according to an embodiment of the present invention is built in a portable terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

Referring to FIG. 8, the PMA wireless charging system charging system 1 includes a wireless power transmission module 10 and a wireless power receiving module 100, and the like. 9, the wireless power receiving module 100 is built in a portable terminal 90 such as a smart phone and is electrically connected to a battery. The wireless power transmitting module 10 is connected to a separate case And the like. The wireless power transmission module 10 operates when the wireless power receiving module 100 approaches and supplies power to the wireless power receiving module 100 wirelessly. The wireless power receiving module 100 charges the built-in battery of the portable terminal 90 with the power supplied as described above.

In FIG. 8, reference numerals 12 and 14 denote hall sensors and permanent magnets constituting an apparatus for detecting approach of the wireless power receiving module 100, and reference numeral 16 denotes a wireless charging antenna pattern for transmission.

2 and 3, the PMA wireless charging type wireless power receiving module 100 according to an exemplary embodiment of the present invention includes an antenna unit 110, a shielding sheet 120, and an attractor 130 do.

The antenna unit 110 may include an antenna pattern for transmitting or receiving a radio signal to and from a portable electronic device such as a cellular phone, a PDA, a PMP, a tablet, a multimedia device, . ≪ / RTI > This will be described later.

As shown in FIG. 2, the antenna unit 110 may be formed of a polyimide (PI) coil, a circular coil, a elliptic coil, or a quadrangular coil, which is wound clockwise or counterclockwise. However, A conductor such as a copper foil may be patterned in the form of a loop on a flexible circuit board made of a synthetic resin such as polyethylene terephthalate (PET), or a loop-shaped metal pattern may be formed on a flexible circuit board using a conductive ink.

A connection terminal for electrical connection with the main circuit board of the portable terminal is provided at an end of the antenna unit 110.

The antenna unit 110 transmits power using an inductive coupling method based on the electromagnetic induction phenomenon through a received radio power signal. The antenna unit 110 includes a part performing a role of a reception coil (Rx coil) Respectively.

That is, the antenna unit 110 may be a wireless coil for wireless power transfer, MST (Secure Secure Transmission) and NFC (Near Field Communication) And at least two antenna patterns 114a, 114b, and 114c may be formed on one surface of the substrate 112. The antenna patterns 114a, 114b,

Here, the substrate 112 is a base material on which the antenna patterns 114a, 114b, and 114c and circuit parts are formed, and has heat resistance, pressure resistance, and flexibility. In consideration of the physical properties of the material, a polyimide film that is a thermosetting polymer film may be employed as the substrate 112.

The shielding sheet 120 is formed of a plate-shaped member having a predetermined area and shields a magnetic field generated by a radio signal induced in the antenna unit 110.

The shielding sheet 120 may have a structure in which a plurality of magnetic sheets of a thin plate are laminated.

Here, the magnetic sheet of the thin plate may be a thin ribbon sheet 121a and a ferrite sheet 121b made of an amorphous alloy or a nano-crystal alloy.

That is, the shielding sheet may be composed of only a thin ribbon sheet 121a made of an amorphous alloy or a nano-crystal alloy as shown in FIG. 4A, and a single ferrite sheet 121b and two And a thin ribbon sheet 121a made of amorphous alloys or nanocrystalline alloys may be stacked.

Here, the amorphous alloy may be an Fe-based or a Co-based magnetic alloy, and it is preferable to use an Fe-based magnetic alloy in consideration of material cost.

In addition, the ferrite sheet 121b may be made of a sintered ferrite sheet such as MnZn ferrite or NiZn ferrite.

However, it should be noted that the magnetic sheet of the above-mentioned thin plate is not limited to the above-mentioned kind but any material having magnetic properties can be used.

Meanwhile, the shielding sheet 120 disposed on the upper side of the antenna unit 110 may fix the antenna unit 110 on one side via an adhesive layer.

Here, the adhesive layer may be a bond having adhesive properties, PVC, rubber, double-sided tape or the like, and may include a conductive component. On the other hand, although not shown, the antenna unit may have a separate substrate such as PI or PET, and the substrate and the shielding sheet may be attached.

On one side of the shielding sheet 120, a part of a magnetic force line generated by the wireless power transmission module 10 is guided to a path of a magnetic flux when the wireless power receiving module 100 approaches the wireless power transmission module 10, And an attractor 130 for changing the voltage value of the hall sensor 12 satisfying the operation start condition of the wireless power transmission module 10 by changing the voltage value of the hall sensor 12.

The attractor 130 is disposed at a position corresponding to the central space portion of the antenna unit 110 and may be formed of a thin plate magnetic piece such as a plate-like sheet or a film member. Preferably, the magnetic piece of the thin plate has at least one surface equal to the area of the central space of the antenna unit 110 so as to obtain a maximum area in the allowable size of the wireless power receiving module 100, Area.

Here, the attractor 130 may be a shielding unit attached to one side of the shielding sheet 120 and integrated with the shielding sheet 120, and may be attached to one surface of the antenna unit 110, Or may be integrated with the unit 110.

In this way, the attractor 130 is integrated with the shielding sheet 120 or the antenna unit 110 to form a single component, thereby simplifying the process of combining the shielding sheet 120 and the antenna unit 110, It is possible to manufacture the receiving module 100, and the manufacturing cost can be reduced by simplifying the assembling process.

The attractor 130 according to an embodiment of the present invention may be formed of a thin magnetic body so as to guide a part of the magnetic force lines generated in the wireless power transmission module 10.

For example, the magnetic material may be a magnetic piece of a thin plate made of silicon steel (FeSi), or a magnetic piece of a thin plate made of an amorphous alloy or a nano-crystal alloy, and a magnetic piece of a thin plate made of ferrite or permalloy may be used. In addition, the attractor may be a magnetic piece of a thin plate made of a polymer. However, it should be noted that the material of the attractor 130 is not limited thereto, and any magnetic material may be used.

Further, the magnetic piece of the thin plate may be composed of only a single amorphous ribbon layer, but it may be constituted by stacking two or more amorphous ribbon layers, preferably, at least five layers of amorphous ribbon layers It is possible. In addition, the amorphous ribbon layer may be flaked and separated into a plurality of pieces.

Generally, in order to perform wireless charging through the PMA wireless charging system, when the wireless power transmission module 10 approaches the wireless power reception module 100, the hall sensor 12 provided on the wireless power transmission module 10 side Should be changed to a certain size or more.

That is, when the hall sensor 12 detects a change in a voltage value of a predetermined magnitude or more, the wireless power receiving module 100 recognizes that the wireless power receiving module 100 is approaching the wireless power transmitting module 10. If the operation start condition of the wireless power transmission module 10 is satisfied through the change of the voltage value in the hall sensor, the wireless power transmission module 10 is operated so that a high frequency signal is transmitted to the wireless power transmission module 10 To the wireless power receiving module 100 side to be charged.

The total thickness of the attractor 130 is increased to increase the induction ratio of the magnetic force lines generated from the permanent magnets 14 or to widen the total area of the attractor 130, It is possible to increase the change value of the voltage generated in the Hall sensor 12. [0050]

However, enlarging the area of the attractor 130 is limited because the overall size of the wireless power receiving module 100 is fixed.

In addition, when the wireless power receiving module 100 is applied to an electronic device such as a mobile phone, the overall thickness of the wireless power receiving module 100 is limited to meet the demand for miniaturization of the electronic device. Therefore, the total thickness of the attractor, which changes the path of the magnetic flux by inducing a part of the magnetic force lines generated in the permanent magnet, is inevitably limited.

Particularly, when the total thickness of the wireless power receiving module 100 is limited to 0.6 mm or less, or even 0.3 mm or less, the total thickness of the attractor 130 that can be used is more severely restricted.

In the present invention, even if the overall thickness of the wireless power receiving module 100 is designed to be 0.15 mm to 0.6 mm, for example, 0.3 mm, the attractor 130 may have a sufficient thickness.

To this end, at least one of the magnetic shield sheet 120 and the antenna unit 110 is provided with an attractor accommodating portion 140 that accommodates at least a part of the thickness of the entire attractor 130.
At this time, the attractor receiving portion 140 is formed at a position corresponding to the central space portion of the antenna unit 110 so that the attractor 130 does not overlap with the antenna unit 110, more specifically, .

Such an attractor receiving portion 140 receives the thickness of at least part of the total thickness of the attractor 130 disposed between the magnetic shielding sheet 120 and the antenna unit 110, The attractor 130 having a sufficient thickness can be used even if the entire thickness is thinned.

For example, the attractor receiving portion 140 may be provided in the form of a receiving recess formed at a predetermined depth inward from one surface of at least one of the magnetic shield sheet 120 and the antenna unit 110.

That is, as shown in FIG. 3, the attractor receiving portion 140 may be provided in the form of a receiving recess formed in a predetermined depth only on one side of the magnetic shielding sheet 120. In this case, if the magnetic shielding sheet 120 is formed of a plurality of layers as shown in FIG. 4, the receiving groove may have a height corresponding to the remaining layers except for the uppermost layer among the plurality of layers. As a result, the entire thickness of the attractor 130 can be increased, and the attractor 130 can be prevented from being exposed to the outside through the uppermost layer constituting the magnetic shielding sheet.

5A, the attractor receiving portion 140 may be provided in the form of a receiving recess formed in one surface of each of the magnetic shielding sheet 120 and the antenna unit 110, .

In addition, though not shown, the receiving groove may be formed at a certain depth only on one side of the antenna unit 110. [

The attractor receiving portion 140 may be formed as a through-hole through at least one of the magnetic shielding sheet or the antenna unit 110. When the attractor receiving portion 140 is provided in the form of a through hole, a separate sealing sheet for preventing the attractor inserted in the through hole from being exposed to the outside is formed on one surface of the magnetic shielding sheet or the antenna unit 150 may be provided. When the sealing sheet 150 is provided as described above, the attractor inserted into the through-hole may be directly fixed to the sealing sheet 150 via the adhesive layer.

Here, the sealing sheet 150 may be a heat-radiating sheet for discharging heat to the outside, or may cover the entire surface of the magnetic-shielding sheet or the antenna unit, and may partially cover the openings of the through- And the like.

5B, the attractor receiving portion 140 may be formed in the form of a through hole formed only through the magnetic shielding sheet, and the magnetic shielding sheet 120 may be formed as a through hole, And the antenna unit 110, respectively, as shown in FIG. In this case, the thickness of the attractor may be substantially the same as the total thickness of the wireless power receiving module.

In addition, though not shown, the through-hole may be formed only in the antenna unit 110.

Meanwhile, the attractor 130 'may have a multi-stage structure having different cross-sectional areas. That is, the attractor 130 'includes a first portion 131 having a relatively large cross-sectional area and a second portion 132 having a relatively narrow cross-sectional area and being stacked on one surface of the first portion 131 . Here, when the attractor 130 'is provided as a first portion 131 and a second portion 132 having different cross-sectional areas, the second portion 132 may be formed on one surface of the first portion 131 As shown in FIG. 7A, they may be symmetrically stacked on the central portion with reference to a virtual center line, and they may be laminated on one of the upper, lower, left, and right sides as shown in FIGS. 7B to 7E It may be stacked asymmetrically.

In the case where the attractor 130 'has a multi-stage structure having different cross-sectional areas, the attractor receptacle 240 may also include the first receptacle 141 and the second receptacle 130' As shown in FIG.

This allows the attractor 130 'to be inserted through the second portion 132 having a relatively narrow area when the attractor 130' is inserted into the attractor receiving portion 240, , And the attractor 130 'can be held in the correct position without using a separate adhesive layer.

Various forms of the multi-stage structure of the attractor 130 'and the attractor receiving portion 240 are shown in FIG.

That is, as shown in FIG. 6A, the attractor receiving portion 240 may be provided in the form of a through hole passing through the magnetic shielding sheet 120, and the magnetic shielding sheet 120, as shown in FIG. 6B, And may be provided in the form of a receiving groove formed to be recessed at a predetermined depth inwardly from one surface of the housing.

At this time, the attractor receiving portion 140 may be provided at the side of the antenna unit 110 in the form of a through hole as shown in FIG. 6C. In addition, although not shown, the antenna unit 110 may be provided with an attractor accommodating portion provided in the form of a receiving groove.

When the attractor 130 'has a multi-stage structure, the first portion 131 having a relatively large cross-sectional area is positioned closer to the antenna unit 110 when stacked with the antenna unit 110 So that the area facing the permanent magnet can be widened when the wireless power transmission module 10 is accessed. In addition, the first portion 131 may be formed to have a relatively larger thickness than the second portion 132.

The wireless power receiving module 100 according to an embodiment of the present invention may include the attractors 130 and 130 'through the attractor receiving portions 140 and 240 provided in at least one of the magnetic shielding sheet 120 and the antenna unit 110. [ The total thickness of the attractors 130 and 130 'can be increased without increasing the overall thickness of the wireless power receiving module 100 by accommodating the thickness of at least a part of the entire thickness of the wireless power receiving module 100.

Therefore, it is possible to detect a stable operating voltage value required by the PMA wireless charging method even when the total thickness of the wireless power receiving module 100 is 0.15 mm to 0.6 mm, for example, 0.3 mm (see FIG. 8 ).

The total thickness t of the wireless power receiving module may be the height of the stack of the antenna unit 110, the attractor 130 and the shielding sheet 120, When the heat radiation sheet 122 is provided, the thickness may include the heat radiation sheet 122.

In addition, although the thickness of the wireless power receiving module 100 is 0.15 mm to 0.6 mm in total thickness, it should be understood that the entire thickness of the wireless power receiving module has a small thickness, and the wireless power receiving module 100 of the present invention.

That is, even if the total thickness of the wireless power receiving module 100 is limited in the PMA wireless charging mode, the thickness of at least a part of the total thickness of the attractor used through the above- It is possible to stably satisfy or realize all the conditions and characteristics required in the PMA wireless charging system while satisfying the thickness.

The PMA wireless charging type wireless power receiving module 100 according to an embodiment of the present invention may be installed inside the rear case or the back cover of the portable terminal 90 as shown in FIG.

8, a PMA wireless charging power type wireless power receiving module 100 according to an exemplary embodiment of the present invention includes a PMA (Radio Frequency Power) module 100 including a wireless power transmission module 10 and a wireless power reception module 100, It may be applied to the wireless charging type charging system 1.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: PMA wireless charging method wireless power receiving module
110: antenna unit 112: substrate
114a: Wireless charging antenna pattern 114b: MST antenna pattern
114c: NFC antenna pattern 120, 120 ', 120 ": shielding sheet
121a: Ribbon sheet of thin plate made of amorphous alloy or nano-crystal alloy
121b: ferrite sheet 122: heat radiation sheet
130,130 ': Attractor 131: First part
132: second part 140, 240:
141: first receiving portion 142: second receiving portion
150: sealing sheet

Claims (24)

A shielding unit for a PMA wireless charging type wireless power receiving module,
A magnetic shielding sheet for shielding a magnetic field generated by a radio signal induced in an antenna of a wireless power receiving module;
A part of the magnetic force lines generated in the permanent magnet provided in the wireless power transmission module is induced to change the path of the magnetic flux so as to satisfy the operation start condition of the wireless power transmission module, An attractor for inducing a change; And
And an attractor accommodating portion provided on the magnetic shielding sheet to accommodate the thickness of the attractor and secure the thickness of the attractor,
The attractor receiving portion is formed at a position corresponding to the inner central space portion of the antenna so as not to overlap with the antenna,
Wherein the total thickness of the attractor is equal to the total thickness of the wireless power receiving module. The method according to claim 1,
Wherein the attractor is formed to have the same size as a size of a central space portion of an inner antenna pattern of the wireless power receiving module. The method according to claim 1,
Wherein the attractor is made of a magnetic substance of a thin plate, and a shielding unit for a PMA wireless charging type wireless power receiving module. The method according to claim 1,
Wherein the attractor is formed by laminating a plurality of amorphous sheets into a shielding unit for a PMA wireless charging type wireless power receiving module. 5. The method of claim 4,
Wherein each of the amorphous sheets is flaked and divided into a plurality of pieces. The method of claim 3,
Wherein the magnetic body is any one selected from the group consisting of silicon steel, amorphous alloy, ferrite, permalloy, and polymer. The method according to claim 1,
Wherein the magnetic shielding sheet comprises at least three layers of amorphous ribbon layers. The method according to claim 1,
Wherein the magnetic shielding sheet comprises at least two layers of amorphous ribbon layers and at least one layer of ferrite layers. delete The method according to claim 1,
And the attractor receiving portion is formed as a through hole penetrating the magnetic shielding sheet. An antenna unit having at least one antenna;
A magnetic shielding sheet for shielding a magnetic field generated by a radio signal induced in the antenna unit;
And a magnetic flux shielding sheet disposed between the antenna unit and the magnetic shielding sheet to induce a part of the magnetic force lines generated in the permanent magnet provided in the wireless power transmission module to change the path of the magnetic flux, An attractor for inducing a voltage value change in a hall sensor provided in a transmitting module; And
And an attractor receiving portion provided on at least one of or both of the magnetic shield sheet and the antenna unit so as to receive the thickness of the attractor and secure the thickness of the attractor,
The attractor receiving portion is formed at a position corresponding to the inner central space portion of the antenna so as not to overlap with the antenna,
Wherein the total thickness of the attractor is equal to the total thickness of the wireless power receiving module. 12. The method of claim 11,
Wherein the antenna unit is a combo type including at least two antennas among a wireless charging antenna, an MST antenna, and an NFC antenna. 12. The method of claim 11,
And the attractor is integrated with the antenna unit or the magnetic shielding sheet. 12. The method of claim 11,
Wherein the attractor is made of a magnetic substance of a thin plate. 12. The method of claim 11,
Wherein the attractor comprises a plurality of amorphous sheets stacked in layers. 16. The method of claim 15,
Wherein each amorphous sheet is flaked and divided into a plurality of pieces. 15. The method of claim 14,
Wherein the magnetic body is any one selected from the group consisting of silicon steel, amorphous alloy, ferrite, and permalloy. 12. The method of claim 11,
Wherein the attractor is formed to have the same size as a size of a central space portion of an inner antenna pattern included in the wireless power receiving module. 12. The method of claim 11,
Wherein the magnetic shield sheet comprises at least three layers of amorphous ribbon layers. 12. The method of claim 11,
Wherein the magnetic shield sheet comprises at least two layers of an amorphous ribbon layer and at least one layer of a ferrite layer. 12. The method of claim 11,
Wherein the total thickness of the wireless power receiving module is 0.15 mm to 0.6 mm. 22. The method of claim 21,
Wherein the total thickness of the wireless power receiving module is 0.3 mm. A portable terminal capable of being charged wirelessly, wherein the PMA wireless charging type wireless power receiving module according to any one of claims 11 to 22 is installed on a rear case or a back cover of the portable terminal main body. A PMA wireless charging type wireless power receiving module according to any one of claims 11 to 22; And
And a wireless power transmission module that operates when the wireless power receiving module approaches or contacts within a predetermined distance to supply power to the wireless power receiving module.
KR1020150102533A 2014-12-26 2015-07-20 Shielding unit for a wireless charging receiver module of a PMA wireless charging type and a wireless charging receiver module having the same KR101646173B1 (en)

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KR101941530B1 (en) 2017-04-05 2019-01-23 한솔테크닉스(주) Antenna unit that have hybrid type antenna pattern connection structure
KR101991011B1 (en) 2018-01-29 2019-06-19 한솔테크닉스(주) Antenna unit with dummy pattern
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