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`a2) United States Patent
`US 9,413,191 B2
`(10) Patent No.:
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`(45) Date of Patent:
`Aug. 9, 2016
`Kim et al.
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`US009413191B2
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`(54) RECEIVER FOR WIRELESS CHARGING
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`SYSTEM
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`(71) Applicants:Si-Han Kim, Gwangju-si (KR);
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`Gi-Yong Na, Seoul (KR)
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`(72)
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`Inventors: Si-Han Kim, Gwangju-si (KR);
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`Gi-Yong Na, Seoul (KR)
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`(73) Assignee: KTHEPOWERINC. (KR)
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`(*) Notice:
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`(21) Appl. No.:
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`Subject to any disclaimer, the term ofthis
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`patent is extended or adjusted under 35
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`U.S.C. 154(b) by 133 days.
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`14/369.350
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`Jan. 9, 2013
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`(22)
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`PCTFiled:
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`(86) PCT No::
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`§ 371 (c)(1),
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`(2) Date:
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`(52) U.S. CI.
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`CPC oe. H02J 7/025 (2013.01); HOLF 27/2804
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`(2013.01); H02J 5/005 (2013.01); HO2J 7/0042
`(2013.01)
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`(58) Field of Classification Search
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`CPC ou... HO02J 7/025; H02J 5/005; H02J 7/0042;
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`H02J 7/355
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`USPC oon 320/107, 108, 112; 307/104
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`See application file for complete search history.
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`References Cited
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`U.S. PATENT DOCUMENTS
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`7,944,171 B2
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`PCT/KR2013/000147
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`Jun. 27, 2014
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`OTHER PUBLICATIONS
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`(87) PCT Pub. No.: WO2013/105776
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`PCTPub. Date: Jul. 18, 2013
`
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`(65)
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`(30)
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`Prior Publication Data
`US 2015/0054455 Al
`Feb. 26, 2015
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`
`:
`se
`sos
`Foreign Application Priority Data
`
`
`
`(KR) weer 10-2012-0002291
`Jan. 9, 2012
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`
`(BR) ereesssesssessseen 10-2012-0048052
`May 7, 2012
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`Aug. 7,2012
`(KR) oe 10-2012-0086193
`Int. Cl
`(51)
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`
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`HolM1OA
`
`HO27 7/02
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`HOIF 27/28
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`023 7/00
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`HO02J 5/00
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`(2006.01)
`(201 6.01)
`(2006.01)
`(2006.01)
`(2016.01)
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`International Search Report—PCT/KR2013/000147 dated Apr. 26,
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`2013.
`;
`(Continued)
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`Primary Examiner — Edward Tso
`(74) Attorney, Agent, or Firm — Cantor Colburn LLP
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`(57)
`ABSTRACT
`A receiver for a wireless charging system, capable ofreceiv-
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`in
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`g powerenergy using non-contact type magnetic induction,
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`includes a coil capable of receiving the power energy and a
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`part for generating a predetermined output power from the
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`power energy received by the coil, a portable terminal, an
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`NFCcoil further provided outside of the coil, and a ferrite
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`sheet further provided at the coil and the NFC coil.
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`20 Claims, 35 Drawing Sheets
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`is
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`wo
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`ESS]
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`Page | of 48
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`SAMSUNG EXHIBIT 1009
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`Page 1 of 48
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`SAMSUNG EXHIBIT 1009
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`US 9,413,191 B2
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`Page 2
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`References Cited
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` 1
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`Fig. 40
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`ARRAY0 A OOWH
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`SRR RYNASISAR AROARAIDEN
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`BONASAORIRBeBEIISD,
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`eee
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`Secor
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`Fig. 49
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`2
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`1 (Korean Patent Registration No.
`That is, in prior art
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`10-0928439), a lowercore is provided to be placed between a
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`first upper core (coil) and a second upper core, and a control
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`unit determines which of the lower core, the first upper core
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`and the second uppercore receives a signal transmitted from
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`1. Field of the Invention
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`
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`a non-contact point power reception apparatus and controls
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`transmission of a powersignal through a corresponding core
`The present invention relates to a wireless charger, and
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`morespecifically, to a receiver for a wireless charging system, in correspondencetoaresult of the determination. However,
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`which provides a new design structure for efficiently receiv-
`acoil (antenna) having a composite functionis not presented,
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`ing powerwirelessly transmitted from the wireless charger.
`and an optimal design condition orstructure is not presented.
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`2. Backgroundofthe Related Art
`In addition,in prior art 2 (Korean Patent Registration No.
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`Techniques of providing wireless transmission and recep-
`10-0971714), the inductive pattern core of the primary core
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`tion units in an electronic device and accomplishing wire-
`unit is provided with a lower core layer having a plurality of
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`lessly charge are under development. Mobile communication
`cores formed on the top of a PCB base and an uppercore layer
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`terminals are developed in a variety of forms recently, and
`having a plurality of cores formed on the top ofa gap panel on
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`therefore, there are charging jacks as diverse as various forms
`the lower core layer, and although the lower core layer and the
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`of power chargers. Although a problem of compatibility
`uppercore layer are positioned to intersect with each other to
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`between the chargers arises accordingly, since the charging
`be provided as multiple layers, a structure of a core (antenna)
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`jacks are standardized to a 24-pin charging jack, the problem
`having a composite function is not presented, and an optimum
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`of compatibility between the chargers has been solved for
`design condition is not specifically presented.
`users.
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`In addition, although prior art 3 (Korean Patent Registra-
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`However, since charging is still accomplished through a
`tion No. 10-1001262) provides a rechargeable cellular phone
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`long cable wired between a charger and a device, users con-
`case including a support for detachably resting a portable
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`siderably suffer from troubles and inconvenience due to the
`terminal; and a charging module provided in the support to
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`limitation on distance. In addition, when a plurality of termi-
`accomplish wireless charge when the portable terminal is
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`nals is charged using one charger, there is a problem in that the
`rested on the support as the magnetic fields generated by the
`users can be troubled due to manual attachment and detach-
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`power supplied from outside are transferred to the portable
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`mentof the charger and the terminal jack or the terminal can
`terminal side by electromagnetic induction, it also does not
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`be damaged dueto abrasion or damages of a connection part.
`present a structure of a core (antenna) having a composite
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`However, since the specification and shape of a terminal
`function and doesnot specifically present an optimum design
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`condition.
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`are different among devices in a connection terminal type,
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`users suffer from difficulties of repeatedly purchasing a new
`Accordingly, it is necessary to develop a wireless charging
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`charging device, and this method generates a new problem of
`method having both a composite function and an optimum
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`discarding previously used chargers when a new device is
`design condition.
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`purchased.
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`In addition, anon-contact type magnetic induction method,
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`i.e.,a wireless charging method, has been devised to solve the
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`above problems. The non-contact type charging methodis a
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`methodofproviding current of a charging parent,i.e., energy,
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`to the battery of a portable electronic device through inductive
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`coupling, by configuring a primary circuit operating at a high
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`frequencyin the charging parent and configuring a secondary
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`circuit at the battery side, i.e., in a portable electronic device
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`or the battery. The non-contact type charging method using
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`the inductive coupling is already used in some application
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`fields (e.g., an electric toothbrush, an electric shaver and the
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`like).
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`However, when the non-contact type charging methodis
`50
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`desired to be applied to a portable electronic device, such as a
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`cellular phone, a portable MP3 player, a CD player, an MD
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`player, a cassette tape player, a notebook computer, a PDA or
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`the like, variation of charging efficiency generated according
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`to the position ofplacing the portable electronic device or the
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`battery should be improved, in addition to the required con-
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`dition ofreducing the volume and weight which will be added
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`to the battery.
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`However, when the non-contact type charging methodis
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`applied to a cellular phone or a smart phone, needless to say
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`that the variation should be improved, there is a problem in
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`that since various types of wireless chargers are released in a
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`predetermined method,the wireless chargers cannot charge a
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`battery if the charging methodsare different.
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`Furthermore, the non-contact type charging method pro-
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`vides only one coil, and a design specification between coils
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`is not determined, and, in addition, an accurate structure of
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`placing a coil in a terminalis not described.
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`To accomplish the above object, according to one aspect of
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`the present invention, in a receiver for a wireless charging
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`system capable of receiving power energy using non-contact
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`type magnetic induction, when the receiver for a wireless
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`charging system is provided with a coil 52 capable of receiv-
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`ing the power energy and a part for generating a predeter-
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`mined output power from the power energy received by the
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`coil, the receiver for a wireless charging system is provided in
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`a portable terminal 60, and an NFC coil 51 is further provided
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`outside ofthe coil, and a ferrite sheet 59 is further provided at
`the coil and the NFC coil.
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`The NFC coil andthe coil are spaced apart from each other,
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`and a spaced distance is between 1
`to 10 mm. The part
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`includes acontrol unit 10 for controlling reception ofwireless
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`power, and when the portable terminal is provided with a
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`main CPU 110 for controlling the portable terminal, the main
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`CPU controls the wireless charge receiver.
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`DISCLOSURE
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`Technical Problem
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`Therefore, the present invention has been madein view of
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`the above problems, andit is an object ofthe present invention
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`to provide a design structure of a wireless power reception
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`unit in order to effectively receive power transmitted from a
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`wireless power transmission unit in a wireless charging sys-
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`tem, and specifically, to provide a new shape of a coil anda
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`structure of selecting and designing the coil.
`
`Technical Solution
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`1
`RECEIVER FOR WIRELESS CHARGING
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`SYSTEM
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`US 9,413,191 B2
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`BACKGROUND OF THE INVENTION
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`3
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`Whena battery is embeddedin the portable terminal, the
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`coil is provided on a surface of the battery embedded in the
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`portable terminal, and a part 55a of the wireless charge
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`receiver is provided on a side surface ofthe battery.
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`In addition, a PCB substrate 55 provided with the part and
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`a substrate 50 provided with the coil are separated and bent in
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`twopieces, andthe part is provided on the side surface of the
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`battery and the substrate 50 of the coil is provided on the
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`surface of the battery, and the substrate 55 provided with the
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`part andthe substrate 50 provided withthe coil are connected
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`to each other using a flexible connection line 57.
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`Onthe other hand, whenthe part 55a is provided on the side
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`surface ofthe battery, the part exists between the substrate 50
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`and the side surface of the battery, and the coil is provided in
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`a lowercase 61 ofthe portable terminal.
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`In addition, the coil is provided in the lower case of the
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`portable terminalin a methodofattachingthe coil to the lower
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`case 61 and attaching a film 62 thereon, and a circuit path of
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`data received through the NFC coil and a circuit path for
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`transferring the power energy received through a wireless
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`powerreception coil are separated from each other, and the
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`twocoils are separated in termsofcircuit.
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`Atthis point, if wireless power energy is received through
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`the coil, power of the NFC coil is turnedoff.
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`In another embodimentofthe present invention, a ferrite
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`sheet provided at the coil andthe NFC coil is integrated in one
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`piece. Then,a space is constructed by forming a groove on the
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`ferrite sheet, and the coil andthe NFC coil are provided in the
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`space, and the coil and the NFC coil are provided ona surface
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`of the ferrite sheet, and the ferrite sheet is also provided
`between the coil and the NFC coil.
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`In addition,the ferrite sheet is made of manganeseorzinc,
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`and the ferrite sheet is made of manganese oxide, zinc oxide
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`or iron oxide, and whether or not a wireless charger and an
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`NFCare usedis displayed on a display screen of the portable
`terminal.
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`Meanwhile, the coil is two or more overlapped coils, and
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`when the coil is provided on a surface of a battery, an area
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`where the coil is provided is 40 to 90% of an area of the
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`surface of the battery, and when the coil is provided on a
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`surface of a case, an area where the coil is provided is 40 to
`90% of an area of the surface of the case.
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`In addition, the ferrite sheet and the coil are manufactured
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`as a film andattachedto a battery or a case, and the coil is
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`provided on an inner surface of a case and attached using a
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`protection film or the coil is provided on an outer surface of a
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`case and attached using a protection film.
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`In addition, the coil is provided inside a case, the coil is
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`provided on a surface of a battery and a protection film is
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`provided on the coil, and two or more types of coils respec-
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`tively having a different characteristic may be provided, and
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`an NFC module for controlling the NFC coil and an MCUfor
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`controlling the coil are separately provided, and a main CPU
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`of the portable terminal controls the NFC module and the
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`MCUor the main CPU of the portable terminal directly
`controls the NFC coil and the coil.
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`the state of a wireless power transmission unit and obtain an
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`effect of enhancing receptionefficiency.
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`BRIEF DESCRIPTION OF THE DRAWINGS
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`FIG. 1 is a block diagram showing a reception unit of a
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`wireless charging system of the present invention.
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`FIG.2 is a view showing another embodimentof a charg-
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`FIGS. 3 and 4 are views showing coils of the present
`invention in detail.
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`FIGS. 5 to 7 are views showing embodimentsof arranging
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`multiple coils.
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`FIG. 8 is a view illustrating the principle of a wireless
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`charger.
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`FIGS. 9 and 10 are flowcharts illustrating the present
`invention.
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`FIGS. 11 to 17 are views showing embodiments describing
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`a one chip construction method and the configurations of
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`block diagrams.
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`FIGS. 18 to 23 are views showing embodiments ofprovid-
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`ing a reception unit on the surface of a battery.
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`FIGS. 24 to 27 are views showing an embodiment of
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`attaching a reception unit on the side surface of a battery
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`travel charger.
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`FIGS. 28 to 31 are views showing embodiments of forming
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`a loop coil inside the case of a device.
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`FIG. 32 is a view showing a domain where a loop coilis
`formedin a lowercase.
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`FIGS. 33 to 37 are views showing arrangements of a wire-
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`less powerreception coil 52 and an NFCcoil 51.
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`FIGS. 38 to 40 are views showing embodiments describing
`controls between coils.
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`FIGS. 41 to 44 are views showing embodiments ofprovid-
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`ing a ferrite sheet.
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`FIG. 45 is a view showing an embodimentofa structure
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`directly forming coils on a ferrite sheet.
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`FIGS. 46 to 49 are views showing other embodiments of
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`BEST MODE FOR CARRYING OUT INVENTION
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`A design structure of a wireless power transmission and
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`reception unit is provided in orderto effectively transmit and
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`receive wireless power in a wireless charging system, and a
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`feasible structure for enhancingthe efficiency oftransmitting
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`and receiving wireless power energy is provided.
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`DETAILED DESCRIPTION OF THE PREFERRED
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`EMBODIMENT
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`Hereafter, a design structure of a reception unit for a wire-
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`less charging system according to an embodiment of the
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`present invention will be described in detail.
`Embodiment 1
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`FIG. 1 is a block diagram showing a reception unit of a
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`wireless charging system of the present invention.
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`Generally, a wireless charging system is configured of a
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`transmission unit for transmitting power energy and a recep-
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`tion unit for receiving the powerenergy, and the transmission
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`unit periodically drives a sensor to sense a predetermined
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`signal and determines whetheror not a charge request signal
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`is sensed. When a charge request signal is sensed, a power
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`transmission unit of the transmission unit is turned on. Then,
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`the transmission unit confirmsbattery voltage ofthe receiving
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`AdvantageousEffects
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`According to aspects of the present invention, the shape of
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`acoil in the reception unitis effectively designed in a wireless
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`power system and, additionally, a structure capable of
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`enhancing efficiency of magnetic fields of the reception unit
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`is provided, such that a reception unit for a wireless power
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`system mayselectively receive wireless power according to
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`Page 39 of 48
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`Page 39 of 48
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`6
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`forming a loop coil by coating or a substrate only for support-
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`ing a loop coil. At this point, itis apparent that the substrate for
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`supporting a loop coil may be a substrate of simple meaning
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`for fixing a spiral coil on a plate (a hardor flexible plate made
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`of metal or resin). That is, it may be a form of attaching a
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`spiral coil on a substrate using a tape or an adhesive.
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`Meanwhile, in still another embodiment of the present
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`invention, there is provided a method of providing a coil in
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`anotherpart.
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`FIG. 4 is a view showing still another embodiment of
`different kinds ofcoils.
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`For example,if an inductance value of the KTP type coil is
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`3 WH and an inductance value ofthe WPCtypecoilis 9 WH,the
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`numberof turns of each corresponding coil will be different.
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`Accordingly, as shownin the figure, the WPC coil is used by
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`connecting lead wires 52a and 526at both endsof the coil 52,
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`and the KTP coil is used by connecting lead wires 52c and 52b
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`at the middle and one endofthe coil 52. In addition, the WPC
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`lead wires 52a and 526 are connected to the WPC matching
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`part 14, and the KTP lead wires 526 and 52c are connected to
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`the KTP matching part 15.
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`Then, wireless power energy is received through the coil
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`connected to a lead wire which is connected to a matching
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`part selected by the control unit 10.
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`FIGS. 5 to 7 are views showing embodimentsof arranging
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`FIG. 5 is a view of an embodiment showinga state of two
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`overlapped coils. That is, in the wireless charging system,
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`coils of different charging methodsare provided in a coil set
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`(e.g., ifa B type charging coil is woundinside or outside of an
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`A type charging coil or a lead wire is provided in the middle
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`of a coil and a different charging method can be selected,
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`these coils are referred to as a coilset).
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`In addition, it shows a case of overlapping twocoilsets.
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`FIG. 6 is a view of an embodiment showing a case of
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`overlapping three coil sets, and FIG. 7 is a view showing an
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`embodiment of two or more coilsets that are not overlapped.
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`As shownin the figures, when multiple coils are provided
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`regardless whether or not the coils are overlapped, the coils
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`sets may be applied as a transmission unitcoil or a reception
`unit coil.
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`US 9,413,191 B2
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`5
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`side through a signal of the reception unit, and if a charge
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`enable state is confirmed,
`transmission of power is per-
`formed.
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`Atthis point, ifthe wireless charging system enters into the
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`abovestate, the reception unit receives the power energy, and
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`poweris chargedinto the battery ofthe reception unit. Thatis,
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`the block diagram of FIG. 1 showsan effective design struc-
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`ture of the reception unit provided to effectively construct
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`such a general wireless charging system.
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`There is provided an antenna loop coil substrate 50 for
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`primarily receiving wireless power, and multiple coils are
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`especially provided in the present invention. That is, a WPC
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`type coil 52, a KTP type coil 53 and an antenna coil 51 used
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`for near field communication (NFC), which is a short range
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`communication, are provided on the loop coil substrate 50 of
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`the present invention. In addition, the coils 51, 52 and 53 are
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`provided on one substrate.
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`Atthis point, as shownin the figure, the antenna coil 51
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`used for NFC is provided at the outermost side.
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`In addition, in the above descriptions, there are provided a
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`ZigBee 11 which is a communication module fortransmitting
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`and receiving signals with t