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`US8,922,162 B2
`(10) Patent No.:
`a2) United States Patent
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`Dec. 30, 2014
`(45) Date of Patent:
`Parketal.
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`US008922162B2
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`(54) PORTABLE TERMINAL HAVING A
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`WIRELESS CHARGER COIL AND AN
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`ANTENNA ELEMENT ON THE SAME PLANE
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`(75)
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`Inventors: Jin-Hyoung Park, Gangwon-do (KR):
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`Ki-Hyun Kim, Gyeonggi-do (KR);
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`Kil-Soo Ko, Gyeonggi-do (KR); Se-Ho
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`Park, Gyeonggi-do (KR); Sung-Kweon
`Park, Gyeonggi-do (KR)
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`(73) Assignee: Samsung Electronics Co., Ltd (KR)
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`(*) Notice:
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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 479 days.
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`(21) Appl. No.: 13/312,359
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`Dec. 6, 2011
`eee
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`oo,
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`Prior Publication Data
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`US 2013/0038278 Al
`Feb. 14, 2013
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`Filed:
`File
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`22)
`(22)
`(65)
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`(30)
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`Foreign Application Priority Data
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`(KR) oe 10-2011-0078611
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`Aug. 8,2011
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`(51)
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`(56)
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`Int. Cl.
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`HOIM 10/46
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`HO02J 7/00
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`(52) U.S. CL
`CPC viecccccesseesseseteescersenseetees HO02J 7/00 (2013.01)
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`USPC wiecesssesctesseseseseecssseecsnecensensseseeansentes 320/108
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`:
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`(58) Field of Classification Search
`USPC viececesesssesseeseseesensees 320/107, 108, 114, 115
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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
`
`(2006.01)
`(2006.01)
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`,
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`3/2011 Partovi et al.eee 320/108
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`6/2012 PartoVi soso 320/108
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`2011/0050164 Al :
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`2012/0146576 AL*
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`* cited by examiner
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`Primary Examiner — Edward Tso
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`(74) Attorney, Agent, or Firm — The Farrell Law Firm, P.C.
`ABSTRACT
`(57)
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`A portable terminal having a wireless charger coil and an
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`antenna element on the same plane is provided, in which a
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`shielding memberis attached to an inner surface of an exter-
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`nal part, a first coil is attached to one surface of the shielding
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`member, facing the inner surface of the external part, and a
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`second coil is attached to the one surface of the shielding
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`member, surroundingthefirst coil on the same plane.
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`15 Claims, 4 Drawing Sheets
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`102
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`Load Switch
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`WCcoil
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`NFCcoil | Rectifier
`
`Petitioner Samsung and Google
`Ex-1010, 0001
`
`Petitioner Samsung and Google
`Ex-1010, 0001
`
`

`

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`Dec. 30, 2014
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`Sheet 1 of 4
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`US8,922,162 B2
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`U.S. Patent
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` FIG. 1
`
`Petitioner Samsung and Google
`Ex-1010, 0002
`
`Petitioner Samsung and Google
`Ex-1010, 0002
`
`

`

`
`U.S. Patent
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`Dec. 30, 2014
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`Sheet 2 of 4
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`US8,922,162 B2
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`195 497
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`133
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`141
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`139
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`144
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`135
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`131
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`FIG.3
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`Petitioner Samsung and Google
`Ex-1010, 0003
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`Petitioner Samsung and Google
`Ex-1010, 0003
`
`

`

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`U.S. Patent
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`Dec. 30, 2014
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`Sheet 3 of 4
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`US 8,922,162 B2
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`NFCcoil
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`TY
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`FIG.4
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`102
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`143-—~
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`L-143
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`WC IC
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`135— (
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`NFCcoil
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`KY
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`FIG.6
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`ChargerIC
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`133 —
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`145—L]LF-o~_
`1-145
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`149
`149
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`101
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`149
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`Battery
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`FIG.7
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`Petitioner Samsung and Google
`Ex-1010, 0004
`
`Petitioner Samsung and Google
`Ex-1010, 0004
`
`

`

`
`U.S. Patent
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`Dec. 30, 2014
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`Sheet 4 of 4
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`US 8,922,162 B2
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`102
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`133
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`WCcoil [sie
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`Load Switch
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`[4+147~~ 147
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`IK)
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` NFCcoil
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`Battery
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`Communication
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`Processor
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`Petitioner Samsung and Google
`Ex-1010, 0005
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`Petitioner Samsung and Google
`Ex-1010, 0005
`
`

`

`
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`US 8,922,162 B2
`
`
`1
`PORTABLE TERMINAL HAVING A
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`WIRELESS CHARGER COIL AND AN
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`ANTENNA ELEMENT ON THE SAME PLANE
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`PRIORITY
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`2
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`recognition distance for NFC. Moreover, since the shielding
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`bodyis usually formedbyrolling to be in a planar form,it is
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`difficult to fix a spirally wound coil or an antenna element
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`having the samestructure.
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`SUMMARY OF THE INVENTION
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`BRIEF DESCRIPTION OF THE DRAWINGS
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`An aspect of embodiments of the present invention is to
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`address at least the problems and/or disadvantages and to
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`provide at least the advantages described below. Accordingly,
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`an aspect of embodiments ofthe present invention is to pro-
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`vide a portable terminal having a structure that facilitates
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`mounting ofa secondary coil for wireless charging and a Near
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`Field Communication (NFC) antenna element, without
`1. Field of the Invention
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`increasing the thickness of the portable terminal.
`The present invention relates to a portable terminal, and
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`Another aspect of embodimentsof the present invention is
`moreparticularly, to a portable terminal having a secondary
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`to provide a portable terminal having a structure that can
`coil for wireless charging, as well as a plurality of antenna
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`elements.
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`achieve a sufficient wireless charging efficiency and a suffi-
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`cient recognition distance for NFC.
`2. Description of the Related Art
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`A further aspect of embodimentsofthe present invention is
`In general, a portable terminal is a device capable of per-
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`to provide a portable terminal having a structure that facili-
`forming a mobile communication function, an electronic note
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`tates fixing of a spirally wound coil or an antenna element
`function, Internet access, and a multimedia function, among
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`having the same configuration as the coil.
`other functions, while being carried by a user. Recently, vari-
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`In accordance with an embodimentof the present inven-
`ous functions have been integrated in a single mobile com-
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`munication terminal called a smart phone.
`tion, there is provided a portable terminalin whichashielding
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`Meanwhile, a transport card, a security card, a credit card,
`memberis attached to an inner surface of an external part, a
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`and the like can be used to make paymentor to authenticate a
`first coil is attached to a surface of the shielding memberthat
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`user by a Near Field Communication (NFC) function. As
`faces the inner surface of the external part, and a second coil
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`portable terminals have becomea daily commodity, they are
`is attached to the surface of the shielding member, with the
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`equipped with the NFC function. Accordingly, a portable
`second coil surroundingthe first coil on a sameplane.
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`terminal is provided with an additional antenna for perform-
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`ing the NFC function. Compared to short-range wireless
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`communication, such as Bluetooth™ or Zigbee™ functions,
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`the NFC technology provides an advantage of fast commu-
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`nication setup between communication devices. Despite this
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`advantage, the NFC function communicates at a relatively
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`low frequency of 13.56 MHz, making it important to be
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`within recognition distance to implement the NFC function in
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`a portable terminal.
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`To supply power to the portable terminal, a detachable
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`battery pack or a built-in battery pack is used. A user charges
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`the battery pack according to the remaining amountofbattery
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`power, generally, using a separate charger. To increase user
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`convenience, efforts have been made to commercialize wire-
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`less charging. For wireless charging,
`inductive coupling
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`using a magneticfield, capacitive coupling using anelectrical
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`field, and radio frequency wave radiation are available.
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`Among them, the inductive coupling schemeis suitable for
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`wireless charging in terms of powerefficiency. According to
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`the inductive coupling scheme, a battery pack is wirelessly
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`charged by aligning a primary coil of a charger with a sec-
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`ondary coil of a portable terminal.
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`To implement both the NFC function and the wireless
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`charging function in a single portable terminal, an NFC
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`antenna element taking the form of a loop antenna and a
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`secondary coil for wireless charging should be mountedin the
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`portable terminal. A shielding body is used to prevent inter-
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`ference between the antenna element and the secondary coil,
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`and to protect from interference caused by the secondary coil
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`on other circuits of the portable terminal when the antenna
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`elementand the secondary coil simultaneously operate. How-
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`ever, the use of a shielding body for each of the antenna
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`element and the secondary coil increases the thickness of the
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`portable terminal. Although the secondary coil for wireless
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`charging maybe utilized as the NFC antenna element,it is
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`difficult to achieve both wireless charging efficiency and a
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`This application claimspriority under 35 U.S.C. §119(a)to
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`a Korean Patent Application filed in the Korean Intellectual
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`Property Office on Aug. 8, 2011, and assigned Serial No.
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`10-2011-0078611, the contents of which are incorporated
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`herein by reference.
`BACKGROUND OF THE INVENTION
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`The above and other objects, features and advantages of
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`certain embodiments of the present invention will be more
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`apparent from the following detailed description taken in
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`conjunction with the accompanying drawings, in which:
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`FIG.1 is an exploded perspective view of a portable ter-
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`minal according to an embodimentof the present invention;
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`FIG. 2 is a plan view of a coil module in the portable
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`terminal of FIG. 1;
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`FIG.3 is a sectional view of the coil module of FIG.2;
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`FIG.4 illustrates mounting of the coil module of FIG. 2 to
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`a battery cover of the portable terminal according to an
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`embodimentof the present invention;
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`FIG. 5 illustrates the portable terminal with which the
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`battery coverillustrated in FIG. 4 is combinable;
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`FIG.6 illustrates mounting of the coil module of FIG. 2 to
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`the battery coverofthe portable terminal according to another
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`embodimentof the present invention;
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`FIG. 7 illustrates the portable terminal with which the
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`battery coverillustrated in FIG. 6 is combinable;
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`FIG.8 illustrates mounting of the coil module of FIG. 2 to
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`the battery cover of the portable terminal according to a
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`further embodimentof the present invention; and
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`FIG. 9 illustrates the portable terminal with which the
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`battery cover of FIG. 8 is to be combined.
`DETAILED DESCRIPTION OF EMBODIMENTS
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`Reference will now be madein detail to embodiments of
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`the present invention with reference to the accompanying
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`drawings. In the drawings, the same reference numerals will
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`be understood to refer to the same elements, features and
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`structures. In addition, a detailed description of a generally
`Petitioner Samsung and Google
`Ex-1010, 0006
`
`Petitioner Samsung and Google
`Ex-1010, 0006
`
`

`

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`US 8,922,162 B2
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`3
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`knownfunction andstructure of the present invention will be
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`avoided lest it should obscure the subject matter ofthe present
`invention.
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`Referring to FIGS. 1-3, a portable terminal 100 according
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`to an embodimentofthe present invention includesa shield-
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`ing member 131 attached to an inner surface of an external
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`part such as a battery cover 102 or a housing 101, and a pair
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`of coils 133 and 135 attached to the shielding member 131.
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`The coils 133 and 135 are mounted on the same plane. The
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`shielding member 131 andthe coils 133 and 135 are collec-
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`tively referred to herein as a coil module 103.
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`Referring to FIG. 1, the portable terminal 100 is a bar type
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`terminal having a touch screen display. While not shown, the
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`display, function keys such as Start/End and Select keys, a
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`transmitter, and a receiver are installed on a front surface of
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`the housing 101.
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`The housing 101 is provided on a rear surface ofthe por-
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`table terminal 100, with a battery mounting recess 111 for
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`accommodating a battery pack. The battery cover 102 covers
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`the battery mounting recess 111. A plurality of terminals 149
`and a camera module 119 are installed at one side of the
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`battery mounting recess 111, with the terminals 149 also
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`being covered by the battery cover 102. An opening 121
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`penetrates through both surfaces ofthe battery cover 102. The
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`camera module 119 is accommodated in the opening 121,
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`thereby securing a capturing path. A connector terminal, a
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`memory slot, a volume key, and a camera shutter switch (not
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`shown) maybe arranged on a side surface ofthe housing 101.
`The coil module 103 is attached to the inner surface of the
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`battery cover 102 and connected to circuits of the portable
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`terminal 100, for example, a communication circuit or a
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`charging circuit via the plurality of terminals 149. Asillus-
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`trated in FIGS. 1-3, the coil module 103 includesthe shielding
`member 131 andthe coils 133 and 135.
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`The shielding member 131 may be formed by injection
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`molding, having first and second accommodation grooves
`141 and 142 ona surfacethereof. Thefirst and second accom-
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`modation grooves 141 and 142 are circular in shape and
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`recessed into one surface of the shielding member 131. The
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`second accommodation groove 142 surrounds the first
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`accommodation groove 141, being concentric with thefirst
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`accommodation groove 141. A shielding wall 137 is inter-
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`posed betweenthefirst and second accommodation grooves
`141 and 142.
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`A pellet being a mixture of metal powder containing an
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`iron (Fe) componentand synthetic resin is injection-molded
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`into the shielding member 131. The synthetic resin is prefer-
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`ably Poly Carbonate (PC), Poly Amide (PA), Acrylonitrile-
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`Butadiene-Styrene (ABS) copolymer, or Nylon. As stated
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`above, the shielding member 131 contains the iron compo-
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`nent which prevents mutual interference between the coils
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`133 and 135, and prevents the coils 133 and 135 from impact-
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`ing circuits within the portable terminal 100, caused by elec-
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`tronic waves generated from high-frequency waves, low-fre-
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`quency waves, or power applied to the coils 133 and 135.
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`As shownin FIGS. 2-3, thefirst coil 133 is accommodated
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`in the first accommodation groove 141 and the second coil
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`135 is accommodated in the second accommodation groove
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`142. The first and second coils 133 and 135 are formed by
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`spirally winding enamel-insulated conductor wires.
`Asthe first and second coils 133 and 135 are accommo-
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`dated in the first and second accommodation grooves 141 and
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`142, respectively, and the second coil 135 surroundsthefirst
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`coil 133. Herein,the shielding wall 137 betweenthefirst and
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`second coils 133 and 135 provides a shielding effect between
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`the coils. In other words, the shielding wall 137 shields inter-
`ference of electronic waves betweenthefirst and second coils
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`20
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`4
`133 and 135. The first and second coils 133 and 135 have
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`connection ends 143 and 145, respectively, extended from
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`one side of the shielding member 131. The connection ends
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`143 and 145 are connectedto circuits of the portable terminal
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`100 via the plurality ofterminals 149 provided on the housing
`101.
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`Wheninstalled, the first and second coils 133 and 135 are
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`exposed from one surface ofthe shielding member 131. How-
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`ever, the first and second coils 133 and 135 face the inner
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`surface of the battery cover 102 when the shielding member
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`131 is attached to the battery cover 102, thereby covering the
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`first and second coils 133 and 135. Consequently, the first and
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`second coils 133 and 135 are covered by the shielding mem-
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`ber 131 and the battery cover 102.
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`Oneofthefirst and second coils 133 and 135 may be used
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`as a secondary coil for wireless charging and the other coil
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`may be used as an NFC antenna element. The coils 133 and
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`135 may also be used as antennas for short-range wireless
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`communication, e.g. Bluetooth™ or terrestrial multimedia
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`broadcasting antennas, the embodimentsofthe present inven-
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`tion utilize the first coil 133 as a secondary coil for wireless
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`charging and utilize the second coil 135 as an NFC antenna
`element.
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`For wireless charging, the portable terminal 100 may be
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`cradled on a charging cradle (not shown)to align a primary
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`coil of a charger with the secondary coil of the portable
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`terminal 100 correspondingto thefirst coil 133. Alternatively,
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`the primary coil is movably mountedin the charging cradle
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`such that whenthe portable terminal 100 is positioned on the
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`charging cradle, the primary coil is moved to align with the
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`portable terminal 100.
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`To align the primary coil of the charging cradle with the
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`first coil 133 ofthe portable terminal 100, the shielding mem-
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`ber 131 may havea protrusion portion 139. The protrusion
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`portion 139 protrudes from the first accommodation groove
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`141 ofthe shielding member131. Since the shielding member
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`131 contains the iron component, the protrusion portion 139
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`also contains an iron component. That is, because the protru-
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`sion portion 139 contains a paramagnetic material, i.e. the
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`iron component, when the protrusion portion 139 is posi-
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`tioned within the magnetic field of a permanent magnet, an
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`attraction force of the permanent magnetpulls on the protru-
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`sion portion 139.
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`The permanent magnetis attachedto the primary coil ofthe
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`charging cradle. Whenthe portable terminal 100 is mounted
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`on the charging cradle, the attraction force between the per-
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`manent magnet and the shielding member 131, particularly
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`the protrusion portion 139, aligns the primary coil of the
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`charging cradle with the first coil 133 ofthe portable terminal
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`100. Meanwhile, while the protrusion portion 139 contains
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`the iron componentand thus has a paramagnetic property, the
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`protrusion portion 139 may have an additional magnetic por-
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`tion attached on the first accommodation groove 141 to
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`increase the attraction force between the permanent magnet
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`ofthe primary coil and the shielding member131. Preferably,
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`the additional magnetic portion is formed of a paramagnetic
`material.
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`FIGS. 4 to 9 illustrate configurations ofa portable terminal
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`that implements both a wireless charging function and an
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`NFCfunction using the coil module 103, with the first coil
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`133 as a secondary coil used for wireless charging and the
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`second coil 135 as an antenna element for NFC, by way of
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`example.
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`FIG.4 illustrates mounting of the coil module 103 on the
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`battery cover 102 ofthe portable terminal 100 according to an
`Petitioner Samsung and Google
`Ex-1010, 0007
`
`Petitioner Samsung and Google
`Ex-1010, 0007
`
`

`

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`6
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`minal. Since grooves for accommodating thefirst and second
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`coils are formed in a shielding member, spirally woundfirst
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`and secondcoils can be readily fixed herein. Furthermore, a
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`shielding wall being a part of the shielding memberisolates
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`the first and secondcoils from each other, thereby preventing
`mutual interference betweenthe first and second coils. As a
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`consequence, high powerefficiency and a sufficient recogni-
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`tion distance can be achieved for the wireless charging func-
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`tion and the NFC function, respectively.
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`While the present invention has been particularly shown
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`and described with reference to embodiments thereof, it will
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`be understoodby those of ordinary skill in the art that various
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`changes in form and details may be made therein without
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`departing from the spirit and scopeofthe present invention as
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`defined by the following claims.
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`5
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`embodimentofthe present invention and FIG. 5 illustrates the
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`housing 101 to be combined with the battery cover 102illus-
`trated in FIG.4.
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`FIG.6 illustrates mounting of the coil module 103 on the
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`battery cover 102 of the portable terminal 100 according to
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`another embodiment of the present invention and FIG. 7
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`illustrates the housing 101 to be combined with the battery
`cover 102 illustrated in FIG.6.
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`To implementthe wireless charging function and the NFC
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`function usingthe first and second coils 133 and 135,thefirst
`and second coils 133 and 135 are connected to a communi-
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`cation processor and a charge Integrated Circuit (IC), respec-
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`tively. An NFC IC or a Wireless Charger (WC) IC is disposed
`on a connection of the first or second coil 133 or 135 to a
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`circuit ofthe portable terminal 100. These ICs control current
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`and voltage during charging.
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`Whatis claimedis:
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`In accordance with the embodimentof the present inven-
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`tion illustrated in FIGS. 4 and 5, the NFC IC is connected to
`1. A portable terminal comprising:
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`a shielding member attached to an inner surface of an
`the communication processor of the portable terminal 100
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`external part;
`and to the second coil 135 mountedto the battery cover 102
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`a first coil attached to a surface of the shielding member
`via the plurality of terminals 149. The chargerIC is installed
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`that faces the inner surface of the external part;
`inside the portable terminal 100 and connectedto the battery
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`a secondcoilattachedto the surface of the shielding mem-
`pack. In addition, the WC IC is connected to the charger IC
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`ber, wherein the second coil surroundsthefirst coil ona
`inside the portable terminal 100 andto the first coil 133
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`same plane; and
`mountedto the battery cover 102 through the remaining plu-
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`a load switch providinga first connection line for connect-
`rality of terminals 149.
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`The embodimentsillustrated in FIGS. 4 and 5 and in FIGS.
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`ing thefirst coil to a battery pack ofthe portable terminal
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`6 and7are substantially identical in configuration, exceptthat and a second connection line for connecting the second
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`the WC ICis installed to the battery cover 102 in the latter
`coil to a communication circuit of the portable terminal,
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`embodiment. Thus further detail of the embodiment illus-
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`wherein the load switch prevents signal or powerinterfer-
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`ence between the first connection line and the second
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`trated in FIGS. 6 and7is not repeated herein.
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`connectionline.
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`FIG.8 illustrates mounting of the coil module 103 on the
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`battery cover 102 of the portable terminal 100 according to a
`2. The portable terminal of claim 1, whereinthefirst coil is
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`further embodiment of the present invention, and FIG. 9
`asecondary coil for inductive coupling with a charger and the
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`secondcoil is an antenna element.
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`illustrates the housing 101 to be combined with the battery
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`cover 102 of FIG.8.
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`3. The portable terminal of claim 1, whereinthefirst coil is
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`Referring to FIGS. 8 and9, the first and second coils 133
`an antenna elementand the secondcoil is a secondary coil for
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`and 135 share connection ends 147 andonly a pair of termi-
`inductive coupling with a charger.
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`nals 149 are installed on the housing 101. In this case, even
`4. The portable terminal of claim 1, further comprising a
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`though poweris supplied andsignals are transmitted through
`battery mounting recess formed on a housing of the portable
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`the shared connection ends 147 andthe pair ofterminals 149,
`terminal, wherein the external part is a battery cover detach-
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`a load switch may prevent signal or power interference on
`ably engaged with the housing, for opening or covering the
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`lines. Since more power is supplied through a line during
`battery mounting recess.
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`wireless charging than during powering of a signal for the
`5. The portable terminal of 1, wherein a battery pack con-
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`NFCfunction, the load switch prevents the wireless charging
`nected to the first coil is accommodated in the portable ter-
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`powerfrom influencing the NFCline or the second coil 135.
`minal and the first coil is a secondary coil for inductive
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`Asillustrated in FIGS. 4 to 9, those of skill in the art will
`coupling with a charger, connected to the battery pack.
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`recognize that a rectifier or a charger IC can beselectively
`6. The portable terminal ofclaim 1, wherein the second coil
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`disposed in connectingthe first and second coils 133 and 135
`is a Near Field Communication (NFC) antenna element.
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`configured as a secondary coil for wireless charging and an
`7. The portable terminal of claim 1, further comprising an
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`antenna element for the NFC function to circuits of the por-
`NFCcontrol circuit built in the portable terminal, wherein
`table terminal 100.
`one of the first and second coils is connected to a communi-
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`Whenthe wireless charging function and the NFC function
`cation circuit of the portable terminal through the NFC con-
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`trol circuit.
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`are implemented using the coil module of the present inven-
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`tion, approximately 71% powerefficiency can be achieved
`8. The portable terminal of claim 1, further comprising a
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`during wireless charging and a recognition distance of about
`wireless charging control circuit built in the external part or
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`25 mm can be secured for the NFC function. Asthefirst and
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`the portable terminal, wherein oneofthe first and second coils
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`second coils are positioned on a sameplane, the increase of
`is connectedto a battery pack of the portable terminalvia the
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`the thickness of the portable terminal is minimized and both
`wireless charging control circuit.
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`the wireless charging function and the NFC function can be
`9. The portable terminal of claim 1, further comprising a
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`implementedin a single terminal.
`magnetic piece attached to the surface of the shielding mem-
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`As is apparent from the above description, the portable
`ber, in an area surroundedbythefirst coil.
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`terminal according to the present invention hasa first coil for
`10. A portable terminal comprising:
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`wireless charging and a second coil for the NFC function on
`a shielding member attached to an inner surface of an
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`the same plane. Therefore, both the wireless charging func-
`external part;
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`tion and the NFC function can be implementedin the portable
`a first coil attached to a surface of the shielding member
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`terminal without increasing the thickness of the portable ter-
`that faces the inner surface of the external part; and
`Petitioner Samsung and Google
`Ex-1010, 0008
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`US 8,922,162 B2
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`20
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`25
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`30
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`35
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`45
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`50
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`55
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`60
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`65
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`Petitioner Samsung and Google
`Ex-1010, 0008
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`

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`US 8,922,162 B2
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`20
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`7
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`a secondcoil attachedto the surface of the shielding mem-
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`ber, wherein the second coil surroundsthefirst coil on a
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`sameplane,
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`wherein the shielding member comprises:
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`a first accommodation groove formedinto the surface of
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`the shielding member; and
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`a second accommodation groove surrounding the first
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`accommodation groove on the surface of the shield-
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`ing member,
`is accommodated in the first
`wherein the first coil
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`accommodation groove and the secondcoil is accom-
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`modated in the second accommodation groove.
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`11. The portable terminal of claim 10, wherein the shield-
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`ing memberfurther comprisesa protrusion portion formed of
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`a paramagnetic material, surrounded by thefirst accommo-
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`dation groove.
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`12. The portable terminal of claim 10, further comprising a
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`m