KR20160144042A - Wireless chargimg device having functional electromagnetic wave magnetic sheet - Google Patents
Wireless chargimg device having functional electromagnetic wave magnetic sheet Download PDFInfo
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- KR20160144042A KR20160144042A KR1020150080296A KR20150080296A KR20160144042A KR 20160144042 A KR20160144042 A KR 20160144042A KR 1020150080296 A KR1020150080296 A KR 1020150080296A KR 20150080296 A KR20150080296 A KR 20150080296A KR 20160144042 A KR20160144042 A KR 20160144042A
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- magnetic sheet
- functional electromagnetic
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- electromagnetic
- antenna
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 118
- 230000009467 reduction Effects 0.000 claims description 32
- 239000000853 adhesive Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 239000002707 nanocrystalline material Substances 0.000 claims description 5
- 229910000676 Si alloy Inorganic materials 0.000 claims description 3
- 229910002796 Si–Al Inorganic materials 0.000 claims description 3
- 229910008458 Si—Cr Inorganic materials 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 12
- 238000010521 absorption reaction Methods 0.000 description 19
- 230000020169 heat generation Effects 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000006698 induction Effects 0.000 description 4
- 235000012489 doughnuts Nutrition 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000002542 deteriorative effect Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002159 nanocrystal Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- H02J7/025—
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- 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
Description
BACKGROUND OF THE
The spread of portable terminals (smart phones, tablet PCs, etc.) is popularized due to the convenience of information sharing and utilization while using various applications while transmitting / receiving various data, and battery discharge is rapidly performed by the usage time, A device capable of quickly and conveniently charging the battery can be demanded.
As is well known, a charging method of a portable terminal most commonly used is a charging method in which a connector of a charger connected to a power source and a connector portion of a portable terminal are directly connected and charged.
Recently, in order to charge more quickly and conveniently, a wireless charging method of a portable terminal has been widely used without directly connecting a connector of a charger and a connector of a portable terminal.
The wireless charging system includes a magnetic resonance system that transmits power through a frequency between transmitting and receiving ends of power for wireless charging and an electromagnetic induction system that generates and induces an induced current between two coils disposed adjacent to each other. Method uses the principle that induction current is generated according to the distance between the winding of the antenna coil and the coil.
In this case, the portable terminal to which the wireless charging method is applied includes not only a wireless charging antenna having a coil for receiving a radio wave for charging, but also a functional electromagnetic wave for increasing the performance of wireless charging by adjusting electromagnetic wave absorption, shielding and impedance characteristics Sheets are included.
The functional electromagnetic wave magnetic sheets used in the portable terminal to which the wireless charging method is applied differ not only in the material composition but also in the composition of the material. A functional electromagnetic-magnetic sheet made of a ferromagnetic substance or a sintered body having a high magnetic permeability is mainly used have.
Various types of wirelessly-charging antennas and electromagnetic wave absorbers disclosed in Korean Patent No. 10-177302 and the like are disclosed.
In recent years, in accordance with the tendency of high-performance, high integration and miniaturization of portable terminals, functional magnetic materials such as amorphous materials and nanocrystalline materials, which have high saturation magnetic flux density and are advantageous for miniaturization of devices, Studies on electromagnetic wave magnetic sheets have been actively conducted.
For example, amorphous or nanocrystalline materials have been used mainly for transformers because of their excellent efficiency characteristics against changes in polarity of electrons. However, in recent years, the use of electromagnetic waves and the improvement of wireless communication and wireless charging environment As a part of the application.
Hereinafter, a wireless charging system to which a conventional functional electromagnetic wave magnetic sheet is applied will be described.
16 and 17 are schematic views showing a wireless charging device to which a conventional functional electromagnetic wave magnetic sheet is applied, and FIG. 18 is a plan view and a sectional view showing a bonding structure between a reception side antenna and a functional electromagnetic wave magnetic sheet of a portable terminal.
16 and 17,
The
At this time, as shown in FIG. 18, the receiving-
In more detail, the reception-
Therefore, when the
At this time, the functional electromagnetic-
However, the conventional functional electromagnetic wave magnetic sheet applied to the wireless charging system has the following problems.
First, the conventional functional electromagnetic wave magnetic sheets generate eddy currents and cause problems in improving battery charging efficiency.
That is, since the conventional functional electromagnetic-wave magnetic sheet is provided in a large-area structure covering the whole of the reception-side antenna, when the magnetic field on the side of the transmission antenna on the side of the wireless charging pad is self-induced to the reception antenna side on the portable terminal side A large electromagnetism sheet has a large swirling eddy current flowing through the electromagnetism magnetic sheet due to the electromotive force. As a result, there is a limitation in improving the battery charging efficiency due to the eddy current.
In other words, power loss of the DC power supplied to the reception-side antenna via the wireless charging pad occurs due to the eddy current as described above. As a result, the magnetic field of the transmission antenna side of the wireless charging pad is transmitted to the reception antenna of the portable terminal There is a limitation in improving the charging efficiency of the battery by allowing the magnetic induction to be made to be charged.
Secondly, since the above-mentioned eddy currents cause heat loss, the temperature of the functional electromagnetic-magnetic sheet as a magnetic body is raised, which adversely affects the performance of the battery or the receiving-side antenna, have.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a functional electromagnetic wave magnetic sheet for use in a wireless charging antenna of a portable terminal which is improved to minimize occurrence of eddy currents and reduce heat generation, And it is an object of the present invention to provide a wireless charging device having a functional electromagnetic-magnetic sheet capable of improving battery charging efficiency.
According to an aspect of the present invention, there is provided an antenna device including: a receiving antenna corresponding to a transmitting antenna on a wireless recharging pad; and a battery connected to the receiving antenna in a wireless rechargeable manner, Characterized in that at least one eddy current reduction hole is formed in a central portion of the functional electromagnetic-magnetic sheet so that a part of the reception-side antenna is exposed through the functional electromagnetic-magnetic sheet. Thereby providing a charging device.
Preferably, at least one slit for reducing eddy current is further extended from the eddy current reduction hole to the outermost portion of the functional electromagnetic-magnetic sheet, and the slit is vertically penetrated.
The functional electromagnetic-wave magnetic sheet may have a circular or elliptical shape corresponding to the outermost size of the receiving-side antenna.
Particularly, the functional electromagnetic-wave magnetic sheet may have a structure in which a plurality of strips each having a band shape are arranged in parallel with each other on one surface of the adhesive sheet in the state that their widthwise ends are close to each other, And a structure in which at least two layers of the strips are laminated on both sides of the adhesive sheet in a state in which their end portions in the width direction are close to each other.
Preferably, when the plurality of strips are stacked in two or more layers, the adjacent upper and lower layers are arranged in a direction parallel to each other.
Alternatively, when the plurality of strips are stacked in two or more layers, the adjacent upper and lower layers are arranged in a direction parallel to each other, and the upper strip and the strips arranged downward are arranged to be shifted to the left and right.
Alternatively, when the plurality of strips are stacked in two or more layers, the adjacent upper and lower layers are arranged in directions intersecting with each other.
Preferably, the functional electromagnetic magnetic sheet is made of one selected from the group consisting of amorphous material, Nano Crystalline material, Fi-Si-Cr alloy, Fe-Si-Al alloy, Fi-Si alloy and ferrite .
First, a functional electromagnetic wave magnetic sheet applied to a wireless charging antenna of a portable terminal is improved to a structure that minimizes generation of eddy current and reduces heat generation by using an amorphous material. Thus, electromagnetic wave absorption, shielding, and impedance The characteristics can be effectively controlled, and the wireless charging efficiency can be improved through the reduction of the eddy current.
Second, by applying the functional electromagnetic-wave magnetic sheet to a structure in which a plurality of amorphous or nanocrystalline strips are combined, heat generation of the functional electromagnetic-magnetic sheet can be minimized, and peripheral components Side antenna, battery, and the like) can be prevented from deteriorating due to heat generation.
1 is a plan view and a sectional view showing that a functional electromagnetic-wave magnetic sheet according to a first embodiment of the present invention is attached to a reception-side antenna of a portable terminal,
FIG. 2 is a plan view and a sectional view showing that a functional electromagnetic-wave magnetic sheet according to a second embodiment of the present invention is attached to a receiving-side antenna of a portable terminal,
3 is a plan view and a sectional view showing that the functional electromagnetic-wave magnetic sheet according to the third embodiment of the present invention is attached to the reception-side antenna of the portable terminal,
FIG. 4 is a plan view and a sectional view showing that a functional electromagnetic wave magnetic sheet according to a fourth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal,
FIG. 5 is a plan view and a sectional view showing that a functional electromagnetic wave magnetic sheet according to a fifth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal,
6 is a plan view and a sectional view showing that the functional electromagnetic-wave magnetic sheet according to the sixth embodiment of the present invention is attached to the receiving-side antenna of the portable terminal,
7 is a plan view and a sectional view showing that a functional electromagnetic-wave magnetic sheet according to a seventh embodiment of the present invention is attached to a receiving-side antenna of a portable terminal,
8 is a plan view and a sectional view showing that the functional electromagnetic-wave magnetic sheet according to the eighth embodiment of the present invention is attached to the reception-side antenna of the portable terminal,
9 is a plan view and a sectional view showing that the functional electromagnetic-wave magnetic sheet according to the ninth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal,
10 is a plan view and a sectional view showing that the functional electromagnetic-wave magnetic sheet according to the tenth embodiment of the present invention is attached to the receiving-side antenna of the portable terminal,
11 is a plan view and a sectional view showing that the functional electromagnetic-wave magnetic sheet according to the eleventh embodiment of the present invention is attached to a receiving-side antenna of a portable terminal,
FIG. 12 is a plan view and a sectional view showing that a functional electromagnetic-wave magnetic sheet according to a twelfth embodiment of the present invention is attached to a reception-side antenna of a portable terminal,
13 is a plan view and a sectional view showing that the functional electromagnetic-wave magnetic sheet according to the thirteenth embodiment of the present invention is attached to the receiving-side antenna of the portable terminal,
FIG. 14 is a plan view and a sectional view showing that a functional electromagnetic-wave magnetic sheet according to a fourteenth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal,
15 is an image showing a test apparatus for measuring the charging efficiency of a portable terminal to which the functional electromagnetic wave magnetic sheet of the present invention is applied,
16 is a schematic view showing a wireless charging apparatus to which a conventional functional electromagnetic wave magnetic sheet is applied,
17 is a plan view and a sectional view showing a structure in which a conventional functional electromagnetic wave magnetic sheet is bonded to a reception side antenna of a portable terminal.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
16 and 17, the wireless charging pad, in which the
The
More specifically, the
Therefore, when the
At this time, the functional electromagnetic-
According to the present invention, a functional electromagnetic-wave magnetic sheet used in a wireless charging system of a portable terminal is improved not only in minimizing the occurrence of eddy currents but also in reducing heat generation to control electromagnetic wave absorption, shielding and impedance, There is one point that can improve battery charging efficiency.
To this end, when the functional electromagnetic-wave magnetic sheet of the present invention is bonded to the receiving-side antenna via the adhesive sheet, at least one of the eddy current reduction holes or the eddy current reduction slits is formed so as to be penetrated Or a combination of a hole for reducing an eddy current and a slit for reducing an eddy current.
More specifically, the functional electromagnetic-magnetic sheet of the present invention differs from the functional electromagnetic-magnetic sheet of the present invention in that the functional electromagnetic-magnetic sheet of the present invention is provided with a large- One or more slits for reducing an eddy-current reduction or a slit for reducing an eddy current may be formed in such a manner as to minimize the occurrence of eddy currents, or a combination of a slit for reducing an eddy current and a slit for reducing an eddy current may be provided.
Preferably, the functional electromagnetic wave magnetic sheet of the present invention is a material capable of effectively controlling electromagnetic wave absorption, shielding, and impedance characteristics in a wireless charging environment, which is installed in a wireless charging antenna of a portable terminal, and includes amorphous or nanocrystalline ) Sheet, a Fi-Si-Cr alloy, a Fe-Si-Al alloy (Sendust), a Fi-Si alloy, and a ferrite.
As described above, the functional electromagnetic-magnetic sheet of the present invention is provided with at least one eddy current reduction hole or a slit for reducing an eddy current, or a combination of the eddy current reduction hole and the eddy current reduction slit, When the magnetic field on the transmission antenna side of the wireless charging pad side is self-induced to the reception antenna side of the portable terminal side, the magnetic flux is changed while generating the electromotive force, The eddy current generated in the functional electromagnetic-wave magnetic sheet can be minimized by the electromotive force.
Hereinafter, each embodiment of the functional electromagnetic-wave magnetic sheet of the present invention will be described as follows. It is to be understood that the present invention is not limited to the following embodiments, and various modifications to the structure capable of reducing the eddy current are possible.
First Embodiment
FIG. 1 is a plan view and a sectional view showing that a functional electromagnetic-wave magnetic sheet according to a first embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
The
The functional electromagnetic-wave
Accordingly, when the
At this time, the functional electromagnetic-
As a result, the decrease of the eddy current reduces the current loss supplied on the DC power side, thereby improving the charging efficiency of the battery.
Second Embodiment
FIG. 2 is a plan view and a cross-sectional view showing that a functional electromagnetic-wave magnetic sheet according to a second embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
2, the functional electromagnetic-
Similarly, the functional electromagnetic-wave
Third Embodiment
FIG. 3 is a plan view and a cross-sectional view showing that a functional electromagnetic-wave magnetic sheet according to a third embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
As shown in FIG. 3, the functional electromagnetic-
Similarly, the functional electromagnetic-wave
Fourth Embodiment
4 is a plan view and a cross-sectional view illustrating that the functional electromagnetic-wave magnetic sheet according to the fourth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
As shown in FIG. 4, the functional electromagnetic-
Similarly, the functional electromagnetic-wave
Fifth Embodiment
FIG. 5 is a plan view and a cross-sectional view illustrating that a functional electromagnetic-wave magnetic sheet according to a fifth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
5, the functional electromagnetic wave
Similarly, the functional electromagnetic-wave
Sixth Embodiment
6 is a plan view and a sectional view showing that the functional electromagnetic-wave magnetic sheet according to the sixth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
As shown in FIG. 6, the functional electromagnetic-
Similarly, the functional electromagnetic-
Seventh Embodiment
7 is a plan view and a sectional view showing that the functional electromagnetic-wave magnetic sheet according to the seventh embodiment of the present invention is attached to the reception-side antenna of the portable terminal.
7, the functional electromagnetic-wave
To this end, the functional electromagnetic-wave
In other words, the functional electromagnetic-wave
Similarly, the functional electromagnetic-
Eighth Embodiment
8 is a plan view and a sectional view showing that the functional electromagnetic-wave magnetic sheet according to the eighth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
8, the functional electromagnetic-
Therefore, the functional electromagnetic-
Example 9
9 is a plan view and a sectional view showing that a functional electromagnetic-wave magnetic sheet according to a ninth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
9, the functional electromagnetic wave
Accordingly, the functional electromagnetic-
FIG. 10 is a plan view and a cross-sectional view illustrating that a functional electromagnetic-wave magnetic sheet according to a tenth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
10, the functional electromagnetic wave
Similarly, the functional electromagnetic-
As described above, according to the first to tenth embodiments described above, at least one eddy-
Accordingly, when the magnetic field on the transmission antenna side of the wireless recharging pad side is self-induced to the receiving antenna side of the portable terminal side, the functional electromagnetic-
On the other hand, the functional electromagnetic-wave magnetic sheet of the present invention not only minimizes eddy currents but also causes heat loss due to eddy currents, raising the temperature of the functional electromagnetic-magnetic sheet as a magnetic substance, It is provided with a structure that can solve the point of causing bad influence due to the heat.
That is, the functional electromagnetic-wave magnetic sheet of the present invention has a structure capable of minimizing the eddy current as well as minimizing the heat generation due to the eddy current, and an embodiment thereof is described in the following Eleventh to 14th embodiment Same as.
Example 11
11 is a plan view and a cross-sectional view showing that the functional electromagnetic-wave magnetic sheet according to the eleventh embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
The functional electromagnetic-
That is, the functional electromagnetic
Preferably, the amorphous or nanocrystalline strips 23 may have a gap of 1 to 100 μm between them. Through the above gap adjustment, electromagnetic absorption, shielding, and impedance The characteristics can be adjusted.
The width W of the amorphous or
As described above, by forming the functional electromagnetic-wave
As a result, direct heat transfer between the amorphous or nanocrystalline strips 23 can be prevented from occurring. As a result, heat generation can be minimized due to the characteristics of the array structure.
That is, when the single amorphous or nanocrystalline plate is composed of one single amorphous or nanocrystalline plate, or when a part of the amorphous or nanocrystalline plate is cut in several rows, A combination of the amorphous or
As described above, the functional electromagnetic-wave
Example 12
12 is a plan view and a sectional view showing that a functional electromagnetic-wave magnetic sheet according to a twelfth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
The functional electromagnetic-
That is, the functional electromagnetic-
Similarly, the functional electromagnetic wave
Example 13
13 is a plan view and a sectional view showing that the functional electromagnetic-wave magnetic sheet according to the thirteenth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
The functional electromagnetic wave
One of the advantages of arranging the amorphous or nanocrystalline strips in the direction crossing the 90 ° is that it is possible to prevent the amorphous or nanocrystalline strip of each layer from easily falling from the
Similarly, the functional electromagnetic-
Example 14
14 is a plan view and a cross-sectional view showing that a functional electromagnetic-wave magnetic sheet according to a fourteenth embodiment of the present invention is attached to a receiving-side antenna of a portable terminal.
The functional electromagnetic wave
For example, the upper amorphous or
Similarly, the functional electromagnetic wave
On the other hand, the strip type sheet according to the eleventh to fourteenth embodiments is not limited to the functional electromagnetic magnetic sheet according to the first embodiment, and is applicable also to the functional electromagnetic magnetic sheet according to the second to tenth embodiments It is possible.
Comparative Example
The conventional functional electromagnetic-
Therefore, since the conventional functional electromagnetic wave magnetic sheet according to the comparative example is provided in a large-area structure covering the whole of the reception-side antenna, the magnetic field on the side of the transmission antenna on the side of the wireless charging pad When induced, large eddy currents are generated.
Experimental Example
The charging efficiency of the portable terminal to which the functional electromagnetic wave magnetic sheet according to each of the above-described Examples and Comparative Examples was applied was measured using the measuring equipment shown in Fig.
In FIG. 15,
In order to test battery charging efficiency, a
The charging efficiency of the portable terminal to which the functional electromagnetic wave magnetic sheet according to each of the above embodiments and the comparative example was applied was measured using the thus equipped measuring equipment. The results are shown in Table 1 below.
As shown in Table 1 above, it can be seen that the functional electromagnetic wave magnetic sheet according to each of the embodiments of the present invention has a higher charging efficiency for the battery than the conventional functional electromagnetic wave magnetic sheet according to the comparative example, It is found that the current supplied from the power source is not required to be large.
Particularly, the functional electromagnetic-wave magnetic sheet according to the tenth embodiment of the present invention is provided in a donut shape having an eddy-
As described above, according to the present invention, a functional electromagnetic wave magnetic sheet applied to a wireless recharging antenna of a portable terminal is improved to have a structure having an eddy current reduction hole and a slit by using an amorphous material, thereby minimizing the generation of eddy currents, Thus, it is possible to effectively control the electromagnetic wave absorption, shielding and impedance characteristics in the wireless charging environment of the portable terminal, and to improve the wireless charging efficiency by reducing the eddy current.
10: Transmission antenna
20: Portable terminal
22: receiving antenna
23: Strip
24: Functional electromagnetic wave magnetic sheet
25: Adhesive sheet
26: Battery
30: hole for reducing eddy current
32: slit for eddy current reduction
40: DC power
42: substrate for wireless charging pad
44: Charging configuration of portable terminal
50: Electronic load
Claims (8)
Wherein at least one eddy current reduction hole is formed in a central portion of the functional electromagnetic-magnetic sheet so that a part of the reception-side antenna is exposed through the functional electromagnetic-magnetic sheet.
Wherein at least one slit for reducing an eddy current is further extended from the eddy current reduction hole to the outermost portion of the functional electromagnetic-magnetic sheet, and the through-hole is formed so as to pass through the functional electromagnetic-magnetic sheet.
Wherein the functional electromagnetic-wave magnetic sheet is provided in a shape having a circular or elliptical area in conformity with the outermost size of the receiving-side antenna.
The functional electromagnetic-magnetic sheet may have a structure in which a plurality of strips each having a band shape are arranged in parallel with each other on one surface of the adhesive sheet in the state that their widthwise ends are close to each other, Wherein at least two layers of the strips are laminated on both sides of the adhesive sheet in a state in which their end portions in the width direction are close to each other.
Wherein when the plurality of strips are stacked in two or more layers, the neighboring upper and lower layers are arranged in a direction parallel to each other.
Wherein when the plurality of strips are stacked in two or more layers, the adjacent upper and lower layers are arranged in parallel to each other, and the upper strip and the lower strip are arranged to be shifted to the left and right sides. .
Wherein when the plurality of strips are stacked in two or more layers, neighboring upper and lower layers are arranged in directions intersecting with each other.
Wherein the functional electromagnetic wave magnetic sheet is made of one selected from the group consisting of amorphous material, Nano Crystalline material, Fi-Si-Cr alloy, Fe-Si-Al alloy, Fi-Si alloy and ferrite. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150080296A KR20160144042A (en) | 2015-06-08 | 2015-06-08 | Wireless chargimg device having functional electromagnetic wave magnetic sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150080296A KR20160144042A (en) | 2015-06-08 | 2015-06-08 | Wireless chargimg device having functional electromagnetic wave magnetic sheet |
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| Publication Number | Publication Date |
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| KR20160144042A true KR20160144042A (en) | 2016-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020150080296A KR20160144042A (en) | 2015-06-08 | 2015-06-08 | Wireless chargimg device having functional electromagnetic wave magnetic sheet |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787238A (en) * | 2017-01-16 | 2017-05-31 | 歌尔科技有限公司 | A kind of wireless charging device |
| US10720277B2 (en) | 2017-09-08 | 2020-07-21 | Witricity Corporation | Ferrite arrangement in a wireless power-transfer structure to mitigate dimensional tolerance effects on performance |
| WO2020256409A1 (en) * | 2019-06-18 | 2020-12-24 | 주식회사 아모센스 | Magnetic field shielding sheet and manufacturing method therefor |
-
2015
- 2015-06-08 KR KR1020150080296A patent/KR20160144042A/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787238A (en) * | 2017-01-16 | 2017-05-31 | 歌尔科技有限公司 | A kind of wireless charging device |
| CN106787238B (en) * | 2017-01-16 | 2023-07-25 | 歌尔科技有限公司 | Wireless charging device |
| US10720277B2 (en) | 2017-09-08 | 2020-07-21 | Witricity Corporation | Ferrite arrangement in a wireless power-transfer structure to mitigate dimensional tolerance effects on performance |
| WO2020256409A1 (en) * | 2019-06-18 | 2020-12-24 | 주식회사 아모센스 | Magnetic field shielding sheet and manufacturing method therefor |
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