1111111111111111 IIIIII IIIII 111111111111111 lllll lllll lllll lllll lllll 111111111111111 11111111
`c19) United States
`
`
`c12) Patent Application Publication
`US 2012/0274148 Al
`c10) Pub. No.:
`(43) Pub. Date: Nov. 1, 2012
`Sung et al.
`
`US 20120274148Al
`
`(54)CONTACTLESS POWER TRANSMISSION
`
`
`DEVICE AND ELECTRONIC DEVICE
`HAVING THE SAME
`
`(30)
`
`
`
`
`
`Foreign Application Priority Data
`
`Apr. 27, 2011 (KR) ........................ 10-2011-0039297
`
`
`
`
`Aug. 10, 2011 (KR) ........................ 10-2011-0079697
`
`
`
`Publication Classification
`
`H02J 17100
`
`(2006.01)
`(2006.01)
`
`
`
`(52)U.S. Cl. ........................................................ 307/104
`
`ABSTRACT
`
`(75) Inventors:Jae Suk Sung, Yongin (KR); Chan
`
`
`Gwang An, Suwon (KR); Dae Ki
`
`Lim, Seongnam (KR); Ki Won
`(51)Int. Cl.
`
`Chang, Suwon (KR); Hyeon Gil
`H0JF 38/14
`
`Nam, Suwon (KR); Sang Woo Bae,
`
`Suwon (KR); Sung Eun Cho,
`
`
`Suwon (KR); Tae Sung Kim, Seoul
`(KR); Dae Seong Jeon, Suwon
`(57)
`
`(KR); Chang Mok Han, Cheonan
`(KR)
`There are provided a contactless power transmission device
`
`
`
`
`
`
`
`
`and an electronic device having the same. The contactless
`(73)Assignee:
`
`
`
`
`power transmission device includes: a flexible substrate; a
`SAMSUNG
`
`
`
`coil unit formed in the flexible substrate and including a coil
`
`ELECTRO-MECHANICS CO.,
`
`
`
`
`part formed to have a wiring pattern form and having a plu­
`LTD.
`
`
`
`
`rality of coil strands connected in parallel with each other to
`
`
`
`thereby form a single coil pattern; and a circuit unit formed in
`
`
`
`
`the flexible substrate and electrically connected to the coil
`unit.
`
`(21)Appl. No.:
`13/286,784
`
`(22) Filed:
`Nov.1 , 2011
`
`20
`
`Ex.1008
`APPLE INC. / Page 1 of 13
`
`

`

`US 2012/0274148 Al
`Patent Application Publication
`Nov. 1, 2012 Sheet 1 of 5
`
`
`
`A�
`
`10
`
`20
`
`FIG. 1
`
`1 1
`
`10
`
`12
`300
`100
`22
`
`21 to
`
`FIG. 2
`
`Ex.1008
`APPLE INC. / Page 2 of 13
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`

`

`US 2012/0274148 Al
`Patent Application Publication
`Nov. 1, 2012 Sheet 2 of 5
`
`
`
`315-
`
`317
`
`313
`
`320
`I
`
`310
`
`311
`
`FIG. 3
`
`310
`
`FIG. 4
`
`Ex.1008
`APPLE INC. / Page 3 of 13
`
`

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`US 2012/0274148 Al
`Patent Application Publication
`Nov. 1, 2012 Sheet 3 of 5
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`
`
`FIG. 5
`
`115
`�
`115a 115b
`118
`
`119
`
`112
`
`I I
`I Id
`_J�
`
`FIG. 6
`
`Ex.1008
`APPLE INC. / Page 4 of 13
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`

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`US 2012/0274148 Al
`Patent Application Publication
`Nov. 1, 2012 Sheet 4 of 5
`
`
`
`1
`
`_,,,, 200
`
`201
`
`FIG. 7A
`
`FIG. 7B
`
`400
`
`Ex.1008
`APPLE INC. / Page 5 of 13
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`

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`US 2012/0274148 Al
`Patent Application Publication
`Nov. 1, 2012 Sheet 5 of 5
`
`1
`
`401
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`1
`
`200
`
`211
`
`FIG. 8A
`
`311 301 311
`
`401
`
`FIG. 88
`
`Ex.1008
`APPLE INC. / Page 6 of 13
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`

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`US 2012/0274148 Al
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`Nov. 1, 2012
`
`1
`
`[0014] In addition, in the case of the contactless power
`
`
`CONTACTLESS POWER TRANSMISSION
`
`
`
`
`
`transmission device according to the related art, since a coil
`
`
`DEVICE AND ELECTRONIC DEVICE
`
`
`
`
`having the form of a single line is mainly used, an alternating
`HAVING THE SAME
`
`
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`current (AC) resistance value may increase due to an eddy
`
`
`
`current, a skin effect, or the like, at a low frequency, such that
`
`loss may occur.
`
`CROSS-REFERENCE TO RELATED
`
`APPLICATIONS
`
`SUMMARY OF THE INVENTION
`
`BACKGROUND OF THE INVENTION
`
`[0001] This application claims the priority of Korean Patent
`
`
`
`
`
`
`Application Nos. 10-2011-0039297 filed on Apr. 27, 2011
`
`
`and 10-2011-0079697 filed on Aug. 10, 2011, in the Korean
`[0015] An aspect of the present invention provides a con­
`
`
`
`
`
`
`
`
`
`Intellectual Property Office, the disclosures of which are
`
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`
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`tactless power transmission device having a reduced thick­
`
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`incorporated herein by reference.
`
`
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`ness and an electronic device having the same.
`[0016] Another aspect of the present invention provides a
`
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`
`
`
`
`
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`contactless power transmission device capable of having a
`
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`minimized thickness by using a thin coil part and an elec­
`[0002] 1. Field of the Invention
`
`
`
`tronic device having the same.
`
`
`
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`[0003] The present invention relates to a contactless power
`[0017] Another aspect of the present invention provides a
`
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`
`
`
`
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`transmission device capable of wirelessly transmitting power
`
`
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`contactless power transmission device capable of being
`
`
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`by using electromagnetic induction, and an electronic device
`
`
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`mounted in an electronic device using a simple method by
`
`having the same.
`
`
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`forming a circuit part and a coil part integrally with each
`[0004] 2. Description of the Related Art
`
`
`
`
`
`
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`
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`other, and an electronic device having a high degree of spatial
`
`[0005] Research into a system for wirelessly, that is, con­
`
`
`
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`freedom in a case by including an integrally formed and slim
`
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`tactlessly, transmitting power in order to charge a secondary
`
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`contactless power transmission device.
`
`
`
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`battery embedded in a portable terminal, or the like, has
`[0018] Another aspect of the present invention provides a
`
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`
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`recently been conducted.
`
`
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`contactless power transmission device capable of minimizing
`[0006] A contactless power transmission device generally
`
`
`
`
`
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`loss generated due to an eddy current, a skin effect, or the like,
`
`
`
`
`includes a contactless power transmitter transmitting power
`
`
`
`
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`at a low frequency, and an electronic device having the same.
`
`
`
`
`and a contactless power receiver receiving and storing the
`
`
`
`[0019] According to an aspect of the present invention,
`power therein.
`
`
`
`there is provided a contactless power transmission device
`
`
`
`[0007] The contactless power transmission device trans­
`
`
`
`
`
`including: a flexible substrate; a coil unit formed in the flex­
`
`
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`mits and receives the power by using electromagnetic induc­
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`
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`ible substrate and including a coil part formed to have a wiring
`
`
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`tion. To this end, eachof the contactless power transmitter and
`
`
`
`
`
`pattern form and having a plurality of coil strands connected
`
`
`
`
`contactless power receiver includes a coil provided in an inner
`
`
`
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`in parallel with each other to thereby form a single coil pat­
`
`portion thereof.
`
`tern; and a circuit unit formed in the flexible substrate and
`
`
`
`[0008] In particular, a contactless power receiver config­
`
`
`electrically connected to the coil unit.
`
`
`
`
`ured of a circuit part and a coil part is attached to a cellular
`
`
`[0020] The flexible substrate may be a film type or thin type
`
`
`phone case or an additional cradle-shaped accessory struc­
`
`
`printed circuit board.
`ture.
`[0021] The flexible substrate may be a polyimide type flex­
`
`
`
`[0009] Each of the circuit part and the coil part, made of
`
`
`
`
`
`ible printed circuit board (FPCB) or a frame retardant 4 (FR-
`
`
`
`
`
`
`different materials and having different shapes, is attached to
`
`
`4)type printed circuit board.
`
`
`
`a case of a mobile communications module such as a case of
`[0022] The coil unit may further include a plate-shaped
`
`
`
`
`
`
`a cellular phone terminal, or the like, or is mounted therein,
`
`
`
`magnetic part having a magnetic path formed therein and
`
`
`
`and both are connected to each other through a process such
`
`
`having the coil pattern attached to one surface thereof.
`
`
`
`as a soldering process for contactless charging.
`
`
`
`[0023] The magnetic part may include a ferrite sheet.
`
`
`[0010] In this case, different kinds of components, each
`
`
`
`[0024] The contactless power transmission device may fur­
`
`having a substantial thickness, are connected to each other,
`
`
`
`
`ther include an adhesion part interposed between the mag­
`
`
`
`such that a thickness of the cellular phone terminal increases,
`
`
`
`
`netic part and the coil part to thereby adhere the magnetic part
`
`
`
`
`and a process of connecting the circuit part and the coil part to
`
`and the coil part to each other.
`
`
`
`
`
`each other is added, such that a process cost increases and a
`[0025] The coil part may have the plurality of coil strands
`
`
`
`
`
`manufacturing process is complicated.
`
`
`
`disposed in parallel lines to thereby form the coil pattern.
`
`
`[0011] Meanwhile, according to the related art, the coil part
`
`
`
`[0026] The coil unit may include the coil pattern formed on
`
`
`
`of the contactless power transmission device is wound in
`
`
`
`
`
`at least one of both surfaces of the flexible substrate, and the
`
`
`
`parallel with a bottom surface (that is, an external contact
`
`
`coil pattern may include contact pads formed at both ends
`
`
`
`
`surface). In addition, the coil is fixed to the bottom surface by
`
`
`
`
`thereof so as to be electrically connected to the circuit unit.
`
`
`
`an adhesive, an adhesive sheet, or the like.
`
`
`
`[0027] The circuit unit may include exposed pads formed
`
`[0012] In the case of the contactless power transmission
`
`
`
`therein so as to be electrically connected to a battery.
`
`
`
`
`
`device according to the related art, a coil having a general
`
`
`
`
`[0028] The coil part may include the coil strands each
`
`
`wire form is used, such that when the coil is wound, it is
`
`
`formed to have the same shape on the both surfaces of the
`
`
`
`
`overlapped and stacked. Therefore, the thickness of the con­
`
`flexible substrate.
`
`
`
`
`tactless power transmission device may be increased due to
`
`
`
`the thickness of the coil, the amount of turns thereof, and the
`[0029] The flexible substrate may include conductive vias
`
`
`
`
`like.
`
`
`
`formed at positions at which ends of the coil strands are
`
`
`
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`disposed, and the coil strands formed on the both surfaces of
`
`
`[0013] Therefore, in accordance with the recent trend
`
`
`
`
`the flexible substrate may be electrically connected to each
`
`
`
`towards thin devices, there is a need to develop a contactless
`
`other by the conductive vias.
`
`
`
`
`power transmission device having a reduced thickness.
`
`Ex.1008
`APPLE INC. / Page 7 of 13
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`US 2012/0274148 Al
`
`Nov. 1, 2012
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`2
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`pattern wound [0030] The coil part may include the coil
`
`
`
`electronic device including a contactless power receiver and
`
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`fifteen times on the flexible substrate having a size of 30
`
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`
`
`an antenna module according to another embodiment of the
`mmx40mm.
`
`present invention.
`
`
`each hav­[0031] The coil part may include the coil strands
`DETAILED DESCRIPTION OF THE PREFERRED
`
`
`ing a width of 0.5 mm or more and a thickness of 36 µm or
`EMBODIMENT
`more.
`of 14 µHor [0032] The coil part may have an inductance
`
`
`[0051] Terms and words used in the specification and
`
`
`
`
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`more and a resistance of0.98Q or less, at a frequency of 125
`
`
`claims should not be interpreted as being limited to typical
`kHz.
`
`
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`meanings or dictionary definitions, but should be interpreted
`inven­[0033] According to another aspect of the present
`
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`as having meanings and concepts relevant to the technical
`
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`
`
`tion, there is provided an electronic device including: the
`
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`
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`scope of the present invention based on the rule according to
`
`
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`contactless power transmission device as described above;
`
`
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`which an inventor can appropriately define the concept of the
`
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`and a case receiving the contactless power transmission
`
`
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`term to describe most appropriately the best method he or she
`device therein.
`
`
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`knows for carrying out the invention. Therefore, the configu­
`device may be [0034] The contactless power transmission
`
`
`
`
`
`
`rations described in the embodiments and drawings of the
`
`
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`directly attached to an inner portion of the case or may be
`
`
`present invention are merely the most preferable embodi­
`
`
`
`disposed to be maximally adjacent thereto.
`
`
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`ments, but do not represent all of the technical spirit of the
`
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`device may be [0035] The contactless power transmission
`
`
`
`
`
`
`present invention. Thus, the present invention should be con­
`
`
`
`
`attached to the inner portion of the case using an adhesive or
`
`
`
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`strued as including all changes, equivalents, and substitutions
`a double sided tape.
`
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`
`
`
`included in the spirit and scope of the present invention at the
`
`
`include an [0036] The electronic device may further
`
`
`
`time of the filing ofthis application.
`
`
`
`
`antenna module including an antenna pattern enclosing the
`
`
`
`invention [0052] Hereinafter, embodiments of the present
`
`
`
`coil pattern of the contactless power transmission device.
`
`
`
`will be described in detail with reference to the accompanying
`
`
`
`attached to the case, [0037] The antenna module may be
`
`
`drawings. At this time, it is noted that like reference numerals
`
`
`
`together with the contactless power transmission device.
`
`
`denote like elements in appreciating the drawings. Moreover,
`
`
`
`antenna be an in-mold [0038] The antenna pattern may
`
`
`
`
`detailed descriptions related to well-known functions or con­
`(IMA).
`
`
`figu rations will be ruled out in order not to unnecessarily
`
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`
`
`obscure the subject matter of the present invention. For the
`
`
`
`device may use [0039] The contactless power transmission
`
`
`
`
`same reason, it is to be noted that some components shown in
`
`
`a frequency in a 1 kHz to 100 MHz band, and the antenna
`
`
`
`the drawings are exaggerated, omitted or schematically illus­
`
`
`module may use a frequency in a 10 kHz to 5 GHz band.
`
`
`
`
`trated, and the size of each component does not exactly reflect
`[0040] The case may be an outer case frame or a battery
`
`its actual size.
`case frame.
`invention [0053] Hereinafter, embodiments of the present
`
`
`
`
`
`
`[0041] The electronic device may further include a battery
`
`
`
`will be described in detail with reference to the accompanying
`
`
`
`
`storing power generated in the contactless power transmis­
`
`
`
`
`drawings. Meanwhile, in describing the embodiments of the
`sion device.
`
`
`
`
`invention, a contactless power transmission device generally
`
`
`
`
`includes a contactless power transmitter transmitting power
`
`
`
`
`and a contactless power receiver receiving and storing the
`
`[0042] The above and other aspects, features and other
`power therein.
`
`
`
`
`advantages of the present invention will be more clearly
`showing [0054] FIG. 1 is a perspective view schematically
`
`
`
`
`
`understood from the following detailed description taken in
`
`
`
`an electronic device and a charging device according to an
`
`
`
`conjunction with the accompanying drawings, in which:
`
`
`
`
`embodiment of the present invention; and FIG. 2 is a cross­
`
`
`showing [0043] FIG. 1 is a perspective view schematically
`
`
`sectional view taken along line A-A' of FIG. 1.
`
`
`
`an electronic device and a charging device according to an
`
`
`[0055] Referring to FIGS. 1 and 2, an electronic device 10
`
`
`embodiment of the present invention;
`
`
`
`
`according to the present embodiment may include a battery
`
`
`[0044] FIG. 2 is a cross-sectional view taken along line
`
`
`
`power to 12 and a contactless power receiver 300 supplying
`A-A' of FIG. 1;
`
`charge the battery the battery 12 to thereby
`
`12.
`
`
`
`power[0045] FIG. 3 is a perspective view of a contactless
`
`[0056] The battery 12 may be a secondary battery capable
`
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`
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`receiver according to an embodiment of the present invention;
`
`
`
`
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`of being charged and discharged, and may be attached to and
`
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`view schemati­[0046] FIG. 4 is an exploded perspective
`
`
`detached from the electronic device 10.
`
`cally showing a coil unit of a contactless power receiver
`
`
`[0057] The contactless power receiver 300 may be received
`
`
`
`
`
`according to a first embodiment of the present invention;
`
`
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`directly in a case 11 of the electronic device 10 to thereby be
`
`
`
`of a[0047] FIG. 5 is a perspective view showing a coil unit
`
`
`
`to be attached to an inner surface of the case 11 or be disposed
`
`
`
`contactless power receiver according to a second embodi­
`
`maximally adjacent thereto.
`
`
`ment of the present invention;
`to the [0058] In addition, a charging device 20 according
`
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`
`[0048] FIG. 6 is a cross-sectional view taken along line
`
`
`
`present embodiment is provided in order to charge the battery
`C-C' of FIG. 5;
`
`
`
`
`charging device 12 of the electronic device 10. To this end, the
`
`[0049] FIGS. 7A and 7B are, respectively, a perspective
`
`
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`20 may include a contactless power transmitter 100 provided
`
`
`
`
`view and a cross-sectional view schematically showing an
`in a case 21.
`
`
`
`
`electronic device including a contactless power receiver and
`household alternat­[0059] The charging device 20 converts
`
`
`
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`
`
`an antenna module according to an embodiment of the
`
`
`ing current (AC) power supplied from the outside into direct
`
`
`present invention; and
`
`
`current (DC) power and again converts the DC power into AC
`
`[0050] FIGS. SA and SB are, respectively, a perspective
`
`
`
`
`voltage having a predetermined frequency to thereby provide
`
`
`
`
`view and a cross-sectional view schematically showing an
`
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`the AC voltage to the contactless power transmitter 100. To
`
`
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`Ex.1008
`APPLE INC. / Page 8 of 13
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`US 2012/0274148 Al
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`Nov. 1, 2012
`
`3
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`this end, the charging device 20 may include a voltage con­
`
`
`
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`[0070] The coil unit 310 and the circuit unit 320 may be
`
`
`
`
`verter 22 converting the household AC power into the AC
`
`
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`connected to each other by first and second contact pads 315
`
`
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`voltage having a predetermined frequency.
`
`
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`and 317. When a connection terminal is formed at an inner
`
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`portion of a flat coil, the coil unit 310 may be electrically
`
`
`
`
`[0060] When the above-mentionedAC voltage is applied to
`
`
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`connected to the circuit unit 320 in a scheme in which the coil
`
`
`
`a coil part of the contactless power transmitter 100, a mag­
`
`
`
`
`unit is connected to the second contact pad 317 through a third
`
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`
`
`netic field in the vicinity of the coil part changes. Therefore,
`
`
`contact pad 313 formed at the inner portion without being
`
`
`
`
`
`the contactless power receiver 300 of the electronic device 10
`
`limited thereto.
`
`
`
`disposed to be adjacent to the contactless power transmitter
`
`
`100 has voltage applied thereto according to a change in
`[0071] According to the embodiment of the present inven­
`
`
`
`
`
`
`
`
`magnetic field, such that the battery 12 is charged.
`
`
`
`
`tion, the circuit unit 320 may include first and second exposed
`
`
`pads 321 and 323 formed therein. Therefore, power received
`
`
`
`[0061] Hereinafter, the contactless power receiver 300
`
`
`
`
`through the coil unit 310 may be processed through the circuit
`
`
`
`
`
`included in the above-mentioned electronic device 10 will be
`
`
`unit 320 and be then connected to a battery (not shown)
`described in detail.
`
`
`
`through the first and second exposed pads 321 and 323.
`
`
`[0062] FIG. 3 is a perspective view of a contactless power
`
`
`
`[0072] In the contactless power receiver 300 according to
`
`
`
`
`
`receiver according to an embodiment of the present invention.
`
`
`the embodiment of the present invention, the coil unit 310 and
`
`
`
`A contactless power receiver 300 according to an embodi­
`
`
`the circuit unit 320 may be integrally formed on the flexible
`
`
`
`
`ment of the present invention includes a coil unit 310 and a
`
`
`
`substrate. Therefore, the contactless power receiver 300 may
`
`circuit unit 320.
`
`
`
`
`
`be simply implemented in the electronic device 10 using only
`
`[0063] The coil unit 310 and the circuit unit 320 may be
`
`
`
`
`a process of attaching the contactless power receiver 300 to
`
`
`integrally formed in a flexible substrate.
`
`
`
`the case in which the contactless power receiver 300 is to be
`
`
`
`
`[0064] The flexible substrate is a thin film substrate includ­
`
`
`
`received or mounting the contactless power receiver 300 in
`
`
`
`ing the coil unit 310 and the circuit unit 320 formed thereon.
`the case.
`
`
`As the flexible substrate, a flexible printed circuit board
`[0073] According to the embodiment of the present inven­
`
`
`
`
`
`(FPCB) may be used.
`
`
`tion, since the flexible substrate only needs to be mounted in
`
`
`
`[0065] The flexible substrate according to the embodiment
`
`
`
`
`the case without performing a separate connection process
`
`
`of the present invention may be any substrate such as a film
`
`
`between the coil unit 310 and the circuit unit 320, a manufac­
`
`
`
`type printed circuit board, a thin type printed circuit board, or
`
`
`
`
`
`turing process of the electronic device may be simplified. In
`
`
`
`the like as long as it has a thin thickness and includes a wiring
`
`
`
`addition, since the coil unit 310 and the circuit unit 320 are
`
`
`pattern formed thereon. The coil unit and the circuit unit may
`
`
`
`
`provided in a state in which they are processed, are connected
`
`
`also be implemented on a flexible printed circuit board made
`
`
`
`to each other on the flexible substrate, movement and con­
`
`
`
`of polyimide or a frame retardant 4 (FR-4) type printed circuit
`
`
`
`
`
`veyance of a product is facilitated and precision in the manu­
`
`
`
`
`board, without being limited thereto. In the case that a printed
`facturing thereof increases.
`
`circuit board made of an FR-4 material is used, costs may be
`
`
`[0074] FIG. 4 is an exploded perspective view of part C,
`
`further reduced.
`
`
`which shows the coil unit 310 of FIG. 3.
`
`
`
`
`[0066] According to the embodiment of the present inven­
`
`
`
`[0075] Referring to FIG. 4, the coil unit 310 of the contact­
`
`
`
`
`tion, coil patterns and circuit patterns that have desired shapes
`
`
`less power receiver includes a coil part 110 and a magnetic
`
`
`may be formed on the flexible substrate using several meth­
`part 120.
`
`
`
`ods such as an etching method, a lithography method, a print­
`[0076] The coil part 110 may include a substrate 112 and a
`
`
`
`
`
`ing method, a deposition method, or the like. In addition,
`
`coil pattern 115 formed on the substrate 112.
`
`
`
`
`
`components for wireless charging are mounted on the flexible
`
`
`
`
`substrate having the circuit patterns and the coil patterns
`[0077] The substrate 112 of the coil part 110 according to
`
`
`
`
`
`
`formed thereon using a surface mounting technology (SMT),
`
`
`
`
`
`the present embodiment may be a thin film substrate, for
`
`
`whereby the coil unit and the circuit unit may be implemented
`
`
`
`
`example, a flexible substrate. In addition, according to the
`
`
`on a single flexible substrate.
`
`
`
`
`
`embodiment of the present invention, the circuit unit 320 may
`
`
`be mounted, together with the coil part 110, on the flexible
`
`
`
`
`[0067] According to the embodiment of the present inven­
`
`
`
`substrate on which the coil part 110 is mounted. The circuit
`
`
`
`
`tion, the coil unit and the circuit unit are configu red on a single
`
`
`unit 320 and the coil unit 310 may be mounted and provided
`
`
`
`flexible substrate, whereby the contactless power receiver
`
`
`integrally with each other on the flexible substrate.
`
`
`may be significantly slim. In addition, the contactless power
`
`
`
`
`receiver is attached to a structure such as a case of a cellular
`
`
`
`[0078] The coil pattern 115 may be formed to have a wiring
`
`phone using a simple attachment method such as the use of
`
`
`
`
`pattern form on at least one surface of the substrate 112. The
`
`double sided tape, whereby a manufacturing cost and a pro­
`
`
`
`coil pattern 115 according to the present embodiment has a
`cess cost may be reduced.
`
`
`
`vortex shape on a plane formed by the substrate 112 and
`
`
`
`includes contact pads 118 formed at both ends thereof so as to
`
`
`
`[0068] In addition, since the contactless power receiver is
`
`
`
`electrically connect the coil pattern 115 to the outside.
`
`
`implemented on the flexible substrate, it may be simply
`
`
`
`
`
`attached even to an electronic device having a curved shape.
`
`
`
`
`[0079] Although the embodiment of FIG. 4 discloses two
`
`
`
`Therefore, the contactless power transmission device may be
`
`
`
`contact pads, that is, that first and second contact pads are
`
`flexibly applied.
`
`
`formed at both ends of flat coil of the coil pattern 115, the first
`
`
`
`and second contact pads are not necessarily limited to the
`
`
`
`
`[0069] According to the embodiment of the present inven­
`
`
`
`above-mentioned configuration. For example, any one of the
`
`tion, both the coil unit 310 and the circuit unit 320 may be
`
`
`first and second contact pads may be formed to traverse
`
`
`
`
`implemented on a single flexible substrate. Therefore, the
`
`
`
`another contact pad, such that the first and second contact
`
`
`
`contactless power receiver 300 including the coil unit 310 and
`
`
`pads may lead to the same side of the coil pattern 115.
`
`
`
`the circuit unit 320 may be provided without performing a
`
`
`
`separate bonding process between the coil unit 310 and the
`
`
`[0080] Here, a top perspective view of the coil part 110
`
`circuit unit 320.
`
`
`
`illustrated up to the coil pattern 115 and the contact pads 118
`
`Ex.1008
`APPLE INC. / Page 9 of 13
`
`

`

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`
`US 2012/0274148 Al
`
`Nov. 1, 2012
`
`4
`
`formed on a lower surface of the substrate 112 is shown in
`
`
`the coil part 110, on the flexible substrate on which the coil
`
`
`
`
`
`
`
`FIG. 4. In addition, the contact pads 118 are connected to the
`
`
`
`part 110 is formed, such that the circuit unit 320 and the coil
`
`
`
`circuit unit 320 through the wiring pattern.
`
`
`
`
`unit 310 may be formed on the flexible substrate. The circuit
`
`
`
`
`unit 320 may be electrically connected to the battery 12 of the
`
`
`[0081] The coil pattern 115 according to the present
`
`
`
`
`
`electronic device 10 and be electrically connected to the coil
`
`
`
`
`embodiment includes a plurality of coil strands 115a to 115e
`unit 310.
`
`
`
`disposed in parallel with each other. Here, all of the plurality
`
`
`
`
`of coil strands 115a to 115e are electrically connected to the
`[0091] According to the embodiment of the present inven­
`
`
`
`
`
`
`
`same contact pad 118. Therefore, the coil strands 115a to
`
`
`
`
`
`tion, the battery 12 of the electronic device 10 and the con­
`
`
`
`115e are connected in parallel with each other to thereby form
`
`
`
`
`tactless power receiver may be electrically connected to each
`
`a single coil pattern 115.
`
`
`
`other through the first and second exposed pads 321 and 323,
`
`
`
`and the coil unit 310 and the circuit unit 320 may be electri­
`
`
`
`[0082] The present embodiment describes a case in which
`
`
`
`cally connected to each other through the first and second
`
`
`
`
`the coil pattern 115 formed on one surface of the substrate 112
`
`
`contact pads 315 and 317.
`
`
`
`includes the five coil strands 115a to 115e, by way of
`
`
`example. In this case, each of the coil strands 115a to 115e of
`[0092] The first and second exposed pads 321 and 323 and
`
`
`
`
`
`
`the coil pattern 115 is disposed to be spaced apart from other
`
`
`
`the first to third contact pads 315, 317, and 313 according to
`
`
`
`coil strands at predetermined intervals in parallel therewith.
`
`
`
`
`
`the embodiment of the present invention may be connected to
`
`
`
`
`
`each other in various schemes. For example, the first and
`
`
`
`[0083] The present embodiment describes a case in which
`
`
`second exposed pads 321 and 323 may be electrically con­
`
`
`
`
`
`the coil pattern 115 has a generally rectangular vortex shape,
`
`
`
`nected to each other using a separate wire. The first and
`
`
`by way of example; however, the coil pattern 115 of the
`
`
`second contact pads 315 and 317 may connect the coil unit
`
`
`
`
`present invention is not limited thereto but may be variously
`
`
`and the circuit unit to each other by forming a wiring pattern
`
`
`
`
`applied. For example, the coil pattern 115 may have a circular
`
`
`on the flexible substrate.
`
`
`
`
`
`vortex shape, a polygonal vortex shape, or the like.
`[0093] In addition, the second and third contact pads 317
`
`
`
`
`
`[0084] The coil pattern 115 may include an insulating pro­
`
`
`and 313 may be connected to each other through a wiring
`
`
`
`tective layer (for example, a resin insulating layer (not
`
`
`
`pattern formed on the coil pattern. In this case, the insulating
`
`
`
`
`
`shown)) formed on an upper portion thereof, as needed, such
`
`
`protective layer may be formed on a surface of the coil pat­
`
`
`that the insulating protective layer protects the coil pattern
`
`tern, and the wiring pattern is formed on the insulating pro­
`
`115 from the outside.
`
`
`
`
`tective layer. In addition, a protective layer may be further
`
`[0085] The magnetic part 120 has a flat plate shape (or a
`
`
`
`formed on the wiring pattern in order to protect the wiring
`
`
`
`sheet shape), is disposed on one surface of the coil part 110,
`
`
`
`pattern. Therefore, the third contact pad 313 may be con­
`
`
`
`and is fixedly attached to the coil part 110. The magnetic part
`
`
`
`
`
`
`nected to the second contact pad 317 while traversing the coil
`
`
`120 is provided in order to efficiently form a magn etic path of
`pattern.
`
`
`
`
`
`end, 115. To this by the coil pattern a magn etic field generated
`[0094] The contactless power receiver 300 according to the
`
`
`
`
`
`the magnetic part 120 may be made of a material through
`
`
`
`
`present embodiment uses the coil pattern 115 formed on the
`
`
`which a magnetic path may be easily formed, and more spe­
`
`
`
`
`thin flexible substrate 112 instead of using a coil in a wire
`
`
`cifically, be formed of a ferrite sheet.
`
`
`
`form as in the case according to the related art, whereby the
`
`
`
`120 according to the [0086] However, the magn etic part
`
`coil part 110 may have a greatly reduced thickness.
`
`
`
`present embodiment is not limited to the above-mentioned
`
`
`
`[0095] In addition, the coil part 110 according to the present
`
`
`
`
`configuration but may be variously applied. For example, the
`
`
`
`
`embodiment includes a single coil pattern 115 formed by the
`
`
`
`
`magnetic part 120 may be formed by applying ferrite powder
`
`
`
`
`plurality of coil strands 115a to 115e connected in parallel
`
`
`
`or a magnetic solution to one surface of the coil part 110.
`
`
`
`
`with each other. Therefore, the coil pattern 115 according to
`
`
`
`[0087] Meanwhile, although not shown, the magnetic part
`
`
`the present embodiment is formed in a pattern form on the
`
`120 may include a metal sheet added to an outer surface
`
`
`
`
`substrate 112; however, an effect of using a coil in a twisted
`
`
`thereof, as needed, such that the metal sheet shields electro­
`
`
`pair wire form (for example, Litz wire) formed by twisting
`
`
`
`
`magnetic waves or leakage flux. The metal sheet may be made
`
`
`several strands of electrical wires may be induced.
`
`
`
`of aluminum, or the like; however, a material of the metal
`
`
`
`[0096] In the case of using the coil in the twisted pair form
`sheet is not limited thereto.
`
`
`
`as described above, loss (for example, loss of an AC resis­
`
`
`[0088] In addition, an adhesion part 140 may be interposed
`
`
`
`tance value, or the like), generated due to an eddy current, a
`
`
`between the coil part 110 and the magnetic part 120 so that the
`
`
`
`skin effect, or the like at a low frequency, may be minimized.
`
`
`unit 310 of coil part 110 and the magn etic part 120 of the coil
`
`
`
`
`the contactless power receiver 300 according to the present
`
`
`
`[0097] As described above, in the coil unit of the contact­
`
`
`
`embodiment are firmly and fixedly adhered to each other.
`
`
`
`
`less power receiver 300 according to the present embodiment,
`
`
`
`
`even if the coil pattern 115 is formed in the twisted wire form,
`
`
`
`[0089] The adhesion part 140 is disposed between the sub­
`
`
`
`the thickness of the coil part 110 may be minimized (for
`
`
`
`strate 112 and the magnetic part 120 and adheres the magnetic
`
`
`
`
`example, may be 0.1 mm or less), whereby the entire thick­
`
`
`
`part 120 and the coil part 110 to each other. The adhesion part
`
`
`
`ness of the contactless power receiver 300 may be reduced.
`
`
`140 may be formed of an adhesive sheet or an adhesive tape or
`
`
`
`
`be formed by applying an adhesive or a resin having adhesive
`
`
`[0098] The above-mentioned of the contact­configu ration
`
`
`
`
`properties to a surface of the substrate 112 or the magnetic
`
`
`
`less power receiver 300 may be equally applied to the con­
`
`
`
`part 120. Here, the adhesion part 140 contains ferrite powder,
`
`
`
`
`
`tactless power transmitter 100 included in the charging device
`
`
`
`whereby the adhesion part 140 may have magnetism together
`
`
`
`20. Therefore, a detailed description of the contactless power
`with the magn etic part.
`
`
`transmitter 100 will be omitted.
`
`
`
`[0090] According to the embodiment of the present inven­
`power receiver[0099] Meanwhile, when the contactless
`
`
`
`
`
`tion, the circuit unit 320 may be formed on the flexible sub­
`
`300 has a small size, the coil part 110 need to be design ed to
`
`
`
`strate on which the coil part 110 is formed. That is, a circuit
`
`
`have a small size correspondingly. Therefore, the individual
`
`
`
`
`for contactless power reception is implemented, together with
`
`
`coil strands 115a to 115e need to have thinner line widths.
`
`Ex.1008
`APPLE INC. / Page 10 of 13
`
`

`

`
`
`US 2012/0274148 Al
`
`Nov. 1, 2012
`
`5
`
`[0100] However, when the coil strands 115a to 115e have
`
`
`
`[0112] In the coil part 110 according to the present embodi­
`
`
`
`
`
`
`
`excessively thin line widths, a resistance value (that is loss) of
`
`ment, the coil pattern 115 is wound fifteen times on the
`
`
`
`the coil pattern 115 increases and an appropriate inductance
`
`
`
`flexible substrate 112 having a size of 30 mmx40 mm and
`value is not shown.
`
`
`each of the coil strands 115a and 115b has a width (d) of0.5
`
`
`the mm and a thickness (t) of36 µm. Due to this c