I 1111111111111111 11111 1111111111 11111 1111111111 1111111111111111 IIII IIII IIII
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`US008941352B2
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`US 8,941,352 B2
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`(IO) Patent No.:
`c12) United States Patent
`(45)Date of Patent:
`Jan.27,2015
`
`
`Hong
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`(54)APPARATUS FOR CONTACTLESS
`(56)
`CHARGING OF MOBILE TERMINAL
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`
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`References Cited
`
`U.S. PATENT DOCUMENTS
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`(75) Inventor: Woong Sun Hong, Suwon-si (KR)
`10/2007 DiStefano ..................... 320/108
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`7,288,918 B2 *
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`5/2012 Lyon ............................. 320/108
`8,183,827 B2 *
`(73) Assignee: Samsung Electronics Co., Ltd.,
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`
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`5/2008 Yamagajo et al. ......... 340/572.7
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`2008/0111694 Al *
`Suwon-si (KR)
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`7/2008 Kato et al. .................... 320/114
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`2008/0164844 Al *
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`6/2009 Cheng et al. .................... 29/847
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`2009/0144972 Al *
`( *)
`Notice: Subject to any disclaimer, the term ofthis
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`6/2011 Hobson et al. ................ 343/702
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`2011/0133998 Al *
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`patent is extended or adjusted under 35
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`U.S.C. 154(b) by 244 days.
`FOREIGN PATENT DOCUMENTS
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`(21) Appl. No.: 13/110,340
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`JP
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`2006042519 A * 2/2006 H02J 7/00
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`May 18, 2011 (22) Filed:
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`*cited by examiner
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`(65)
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`Prior Publication Data
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`US 2011/0285348 Al Nov. 24, 2011
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`Primary Examiner - Edward Tso
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`Assistant Examiner - Ahmed Omar
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`(74)Attorney, Agent, or Firm - Jefferson IP Law, LLP
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`(30)
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`Foreign Application Priority Data
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`(51)Int. Cl.
`H02J7/00
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`H02J 7102
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`(2006.01)
`(2006.01)
`(2006.01)
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`(57)
`ABSTRACT
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`May 19, 2010 (KR) ........................ 10-2010-0046839
`A contactless charging apparatus of a portable terminal is
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`provided. The contactless charging apparatus of a portable
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`terminal includes a main circuit board, a rectifying unit, a
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`mounted on the main charging unit, and a secondary coil unit
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`circuit board for generating an electromotive force. The sec­
`H0JF 5100
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`ondary coil unit may be formed on the main circuit board in a
`(52)U.S. Cl.
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`
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`patterning process instead of an existing copper line coil. A
`CPC ................ H02J 71025 (2013.01); H0JF 51003
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`coil layer formed in the patterning process generates an elec­
`(2013.01)
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`tromotive force induced by a magnetic induction field created
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`USPC ........... 320/108; 320/107; 320/110; 320/111;
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`by a contactless charger, and a direct current is applied to a
`320/112
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`unit and the battery to charge the battery using the rectifying
`( 58)Field of Classification Search
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`charging unit.
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`CPC ........................................................ Y02J 7 /025
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`USPC .......................................................... 320/108
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`
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`See application file for complete search history.
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`7 Claims, 6 Drawing Sheets
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`200
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`U.S. Patent Jan.27,2015
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`Sheet 1 of 6 US 8,941,352 B2
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`FIG. 1
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`1
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`U.S. Patent Jan.27,2015
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`Sheet 2 of 6 US 8,941,352 B2
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`FIG. 2
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`U.S. Patent Jan.27,2015
`Sheet 3 of 6
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`US 8,941,352 B2
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`FIG. 3
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`11 a
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`13
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`13a
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`11 b
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`11a
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`15- �
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`I
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`U.S. Patent
`Sheet 4 of 6
`Jan.27,2015
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`US 8,941,352 B2
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`FIG. 4
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`11 C
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`11 a
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`--
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`25a \
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`25a
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`27
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`25c
`13
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`U.S. Patent Jan.27,2015
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`Sheet 5 of 6 US 8,941,352 B2
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`FIG. 5
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`1 �
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`f
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`�
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`500
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`'-- (
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`11
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`/
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`I
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`(
`) )
`21a 20
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`511
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`510
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`5
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`-
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`3
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`�
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`530
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`U.S. Patent Jan.27,2015
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`Sheet 6 of 6 US 8,941,352 B2
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`FIG. 6
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`200
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`230
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`2101J
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`US 8,941,352 B2
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`1
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`APPARATUS FOR CONTACTLESS
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`CHARGING OF MOBILE TERMINAL
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`PRIORITY
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`2
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`In addition, since secondary coils are wound by a copper
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`line, they are more susceptible to electric shocks and may be
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`easily circuit-shorted. In that case, the portable terminal can­
`not be charged.
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`SUMMARY OF THE INVENTION
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`BACKGROUND OF THE INVENTION
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`This application claims the benefit under 35 U.S.C. § 119
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`(a) ofa Korean patentapplicationfiledonMay 19, 2010 in the
`An aspect of the present invention is to address at least the
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`Korean Intellectual Property Office and assigned Serial No.
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`above-mentioned problems and/or disadvantages and to pro­
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`10-2010-0046839, the entire disclosure of which is hereby
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`vide at least the advantages described below. Accordingly, an
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`incorporated by reference.
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`aspect of the present invention is to provide a contactless
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`charging apparatus of a portable terminal in which a second-
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`on a main circuit board. ary coil thereof is directly installed
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`In accordance with an aspect of the present invention, a
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`contactless charging apparatus of a portable terminal is pro-
`1. Field of the Invention
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`15 vided. The apparatus includes a main circuit board, a rectify­
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`The present invention relates to a contactless charging
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`on ing unit, a charging unit, and a secondary coil unit mounted
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`apparatus for a portable terminal. More particularly, the
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`the main circuit board for generating an electromotive force
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`present invention relates to a contactless charging apparatus
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`induced by the primary coil unit.
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`for a portable terminal that improves durability.
`a a coil layer having The secondary coil unit may include
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`2. Description of the Related Art
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`20 circular form on a plane. The seconda
`ry coil unit may be
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`A portable terminal is typically charged using a wired
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`formed on the main circuit board in a patterning process.
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`charging method. The wired charging method may be divided As described above, a secondary coil may be formed on a
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`main circuit board in a patterning process to reduce a thick­
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`into a method that uses a USB type charger and a method that
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`ness of a portable terminal and increase the durability thereof.
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`uses a holder type charger.
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`Further, a contactless charging apparatus may be mounted
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`The USB type charger is directly inserted into a charging
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`in a portable terminal to reduce a manufacturing cost.
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`socket formed at one side of a portable terminal in order to
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`Other aspects, advantages, and salient features of the
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`charge the portable terminal.
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`invention will become apparent to those skilled in the art from
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`On the other hand, the holder type charger charges the
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`the following detailed description, which, taken in conjunc­
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`portable terminal by supplying current to a terminal included
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`tion with the annexed drawings, discloses exemplary embodi-
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`of a in the holder that is connected to a battery terminal
`ments of the invention.
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`portable terminal. The other end of the holder terminal is
`BRIEF DESCRIPTION OF THE DRAWINGS
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`electrically connected to an external outlet.
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`However, the wired charging method may not properly
`The above and other aspects, features, and advantages of
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`charge the battery of a portable terminal due to a defective
`35
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`present invention will certain exemplary embodiments of the
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`contact between the charger and the battethe charg-ry during
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`be more apparent from the following description taken in
`ing period, resulting in an undercharged battery and reduction
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`conjunction with the accompanying drawings, in which:
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`of battery life.
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`FIG. 1 is a perspective view illustrating a configuration of
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`To address the foregoing problems, a contactless charging
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`a portable terminal according to an exemplaof ry embodiment
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`method has been developed. The contactless charging method 40
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`the present invention;
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`does not charge a portable terminal using a charger in a wired
`FIG. 2 is an exploded view illustrating a lower part of a
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`scheme. Rather, the contactless charging method includes a
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`of portable terminal according to an exemplary embodiment
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`contactless charger and a contactless charging apparatus
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`the present invention;
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`installed in a portable terminal.
`FIG. 3 is a perspective view illustrating a configuration of
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`45
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`In the contactless charging method, a secondary coil of a
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`a contactless charging apparatus mounted on a main circuit
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`contactless charging apparatus that is installed in a portable
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`of the present board according to an exemplary embodiment
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`terminal generates an electromotive force that is induced by a
`invention;
`FIG. 4 is a sectional side view taken along line A-A' of FIG.
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`charger to charge a primary coil mounted in a contactless
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`present 3 according to an exemplaof the ry embodiment
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`terminal. battery located in the portable
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`50
`invention;
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`In recently developed contactless charging methods, a sec-
`view illustrating a FIG. 5 is a fragmentary sectional side
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`in ondary coil of a contactless charging apparatus is mounted
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`portable terminal with a contactless charger and a contactless
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`contactless a battery or is separately installed in an external
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`charging apparatus engaging therewith according to an exem­
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`charging apparatus of the portable terminal.
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`and plary embodiment of the present invention;
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`In the case where the in the secondary coil is mounted
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`FIG. 6 is a perspective view illustrating a configuration of
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`of battery , if the the user must but a new battery battery is lost,
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`a contactless charging apparatus mounted on a main circuit
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`the same type since a battery of another standard may not
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`of the board according to another exemplary embodiment
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`and thus may in the battery include a secondary coil mounted
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`present invention.
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`not be charged. However, because a secondary coil is
`Throughout the drawings, it should be noted that like ref­
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`Accordingly, mounted in the battery, the battery is expensive.
`60
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`erence numbers are used to depict the same or similar ele­
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`battery is lost, a if the batteits end of life or if the ry reaches
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`ments, features, and structures.
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`user must buy a battery with a secondary coil in order to
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`power the portable terminal.
`DETAILED DESCRIPTION OF EXEMPLARY
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`in a On the other hand, when the secondary coil is installed
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`EMBODIMENTS
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`separate external contactless charging apparatus, a thickness
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`of the portable terminal is increased due to a charging com­
`The following description with reference to the accompa­
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`nying drawings is provided to assist in a comprehensive
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`ponent. This results in an inconvenience to the user.
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`US 8,941,352 B2
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`4
`3
`using a develop­photo-resist removes the process selectively of the invention as understanding of exemplary embodiments
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`defined by the claims and their equivalents. It includes vari­ing solution. The etching process removes an unnecessa
`ry
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`oxide layer exposed by the photo-resist in the exposure pro­
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`ous specific details to assist in that understanding but these are
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`to be regarded as merely exempla
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`removes a photo-resist remaining cess. The those of peeling process ry . Accordingly,
`that various changes will recognize ordinary skill in the art
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`5 on the oxide layer.
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`and modifications of the embodiments described herein can
`is well known, Since the foregoing exemplary embodiment
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`be made without departing from the scope and spirit of the
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`a detailed description is omitted.
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`invention. In addition, descriptions of well-known functions
`In an exemplary implementation, the patterning process of
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`and constructions may be omitted for clarity and conciseness.
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`the coil layer is performed simultaneously with formation of
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`The terms and words used in the following
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`10 a circuit description and wiring on the main circuit board 20. This reduces a
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`claims are not limited to the
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`manufacturing bibliographical meanings, but, cost and a repetitive process.
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`are merely used by the inventor to enable a clear and consis­
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`FIG. 3 is a perspective view illustrating a configuration of
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`tent understanding of the invention. Accordingly, it should be
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`a contactless charging apparatus mounted on a main circuit
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`apparent to those skilled in the art that the following descrip­
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`of the present board according to an exemplary embodiment
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`is 15 tion of exemplary embodiments of the present invention
`invention.
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`provided for illustration purpose only and not for the purpose
`Referring to FIG. 3, a contactless charging apparatus 10 of
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`of limiting the invention as defined by the appended claims
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`the present invention includes a rectifying unit 13, a charging
`and their equivalents.
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`unit 15, and a secondary coil 11 formed on a main circuit
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`It is to be understood that the singular forms "a," "an," and
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`board 20. In an exemplary implementation, the secondary coil
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`"the" include plural referents unless the context clearly die-20
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`may be formed during a patterning process to reduce a thick­
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`tates otherwise. Thus, for example, reference to "a compo­
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`ness and a manufacturing cost of the portable terminal, and to
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`nent surface" includes reference to one or more of such sur­
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`increase the durability of the portable terminal. The second­
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`a coil layer lla. Though illustrated hav­
`faces.
`ary coil 11 includes
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`FIG. 1 is a perspective view illustrating a configuration of
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`ing a circular form, this is merely for convenience and not
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`of 25 a portable terminal according to an exemplary embodiment
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`limitation as the secondary coil unit 11 formed on the main
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`the present invention.
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`circuit board 20 may have any polygon shape such as a circle,
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`Referring to FIG. 1, a portable terminal 1 includes a body
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`an ellipse, a hexagon, a square, and the like. The seconda
`ry
`(LCD) Sa
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`3, a slide unit 5, and a Liquid Cry stal Display
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`coil unit 11 is made of a conductive material. As an example,
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`coupled to the slide unit 5. It is to be understood that, although
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`a material of the secondary coil unit 11 on the main circuit
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`a slide type terminal is illustrated, of 30 exemplary embodiments
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`board 20 may be the same as that of a conductive wiring and
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`the present invention are equally applicable to other types of
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`may be a conductive material to generate an induced electro-
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`terminals such as a folder type terminal, and the like.
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`motive force.
`The main circuit a lower part of a board 20 has a multiple structure com­
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`FIG. 2 is an exploded view illustrating
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`outermost layer posed of a first of outermost layer 21a, a second to an exemplary embodiment
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`portable terminal according
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`35 21b, and a plurality of inner layers disposed between the first
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`the present invention.
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`and second outermost layers 21a and 21b. The first outermost
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`Referring to FIG. 2, the portable terminal includes an upper
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`layer 21a includes one or more semiconductor devices
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`case 3a, a lower case 3b, a slide unit 5, a main circuit board 20,
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`formed at an upper surface of the main circuit board 20. The
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`a battery 30, and a battery case 3c. The main circuit board 20
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`is disposed between the upper case 3a and the lower case 3b
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`second outermost layer 21b includes one or more semicon­
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`13, a 40 and includes a secondary coil 11, a rectifying unit
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`ductor devices formed at a lower surface of the main circuit
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`terminal 15a. The charging unit 15, and a battery charging
`board 20. The secondary coil unit 11 may be formed at one of
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`lower case 3b includes a recessed portion into which battery
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`the first and second outermost layers 21a and 21b of the main
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`30 may be placed. Moreover, the lower case 3b may include
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`circuit board 20. Furthermore, the plurality of inner layers
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`an opening that allows a 31 to contact battery terminal battery
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`include wirings formed between the first and second outer­
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`charging terminal 15a when the portable terminal is 45 most layers 21a and 21b, and via holes connecting the wirings
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`in more detail with This will be illustrated to each other. assembled and the battery 31 is installed. The battery case 3c
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`is provided for coupling with the recessed portion of the lower reference to FIG. 4.
`apparatus 10 may be installed in
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` The contactless charging case 3b so as to protect the battery and maintain the battery in
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`the desired position.
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`a baseband block 29. In this case, the baseband block 29 is
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`to reduce electro­The secondary coil unit 11 is formed at one surface of the composed oflogic circuits (not illustrated)
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`with a radio frequency block com- magnetic interference 11 includes a main circuit board 20. The secondary coil unit
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`coil layer spirally formed in a circular form on a plane. posed of communication circuits on the main circuit board 20.
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`of FIG. 3, secondain the expanded section As illustrated the secondaIn an exemplary implementation, ry coil unit ry
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`coil unit 11 includes a coil layer lla having an end llb that is
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`11 may be formed on the main circuit board 20 during a
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`electrically connected to one of two connecting terminals 13a
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`patterning process. More specifically, the secondary coil unit 55
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`and 13b of the rectifying unit 13. The rectifying unit 13 is
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`11 may be formed during a patterning process, which may
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`composed of a diode and a capacitor, and rectifies an alter­
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`occur during the same patterning process used to form the
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`nating current induced by the secondary coil unit 11 to a direct
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`semiconductor circuit wiring.
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`current using the diode and the capacitor. Further, the recti­
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`11 may be manufac­For example, the secondary coil unit
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`fying unit 13 connects with the charging unit 15 which
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`tured by sequentially performing a deposition process, a coat-60
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`with a terminal 15a for contact includes a battery charging
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`ing process, an exposure process, a development process, an
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`to a battery . The rectifying unit 13 provides the direct current
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`etching process, and a peeling process. The deposition pro­
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`charging circuit (not shown) of the charging unit 15. When a
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`cess forms an oxide layer (deposition layer) on a semicon­
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`unit the charging battery is installed in the portable terminal,
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`ductor substrate. The coating process coats the oxide layer
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`15 is electrically connected to the battery through the battery
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`with a photo-resist. The exposure process irradiates light
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`charging terminal 15a such that the rectified current provided
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`(e.g., ultraviolet rays) on desired sections of the oxide layer to
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`to the charging unit 15 may be applied to the battery .
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`11. The development form a shape of the secondary coil unit
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`Ex.1005
`APPLE INC. / Page 9 of 11
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`US 8,941,352 B2
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`The coil layer lla of the seconda
`ry coil unit 11 formed on
`circuit element and/or a wiring. In that case, the seconda
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`ry
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`coil unit 110 may be formed using the inner layers 230.
`the main circuit board 20 may have a polygon such as a circle,
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`As illustrated in FIG. 6, to increase efficiency of an induced
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`an ellipse, and a square.
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`110 may be pref-electromotive force, the secondary coil unit
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`FIG. 4 is a sectional side view taken along line A-A' of FIG.
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`5 erably formed at inner layers 230a and 230b under outermost
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`3 according to an exemplaof the present ry embodiment
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`layers 210a and 210b among the inner layers 230 of the main
`invention.
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`circuit board 200.
`As shown in FIG. 4, connection between the secondary coil
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`Namely, in a case of an outermost layer 210a of an upper
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`unit 11 and the rectifying unit 13 may be achieved through via
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`surface of the outermost layers 210a and 210b, a seconda
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`holes 25a, 25b, and 25c and a wiring layer 27 formed on the
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`coil unit 110 including a coil layer 110a is formed at an inner
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`main circuit board 20.
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`layer 230a under the outermost layers 210a and 210b. In a
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`More specifically, an outermost end llb of the coil layer
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`case of an outermost layer 210b, the secondary coil unit 110
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`lla is electrically connected to connecting terminal 13a of
`may be formed at an inner layer 230b under the outermost
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`the rectifying unit 13 at the outermost layer 21a of the main
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`layers 210a and 210b.
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`circuit board 20 on which the coil layer lla is formed. This
`110 is formed in substan­Further, the secondary coil unit
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`15
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`configuration is illustrated in FIG. 3.
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`tially the same patterning process as that described above.
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`Another end llc, formed at a center of the coil layer lla, is
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`unit 110 to a rectifying To connect the secondary coil unit
`electrically connected to connecting terminal 13b of the rec­
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`130 formed at an outermost layer 210a, both ends 110b and
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`tifying unit 13. The end llc of the coil layer lla makes
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`110c of the coil layer 110a may be electrically connected to
`contact to the connecting terminal 13b through the wiring
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`20 connecting terminals 130a and 130b of the rectifying unit 130
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`layer 27 formed in via holes 25a, 25b, and 25c, which are
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`formed at an outermost layer 210a of the main circuit board
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`200 through via holes 250a and 250b and a wiring layer 270,
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`formed on inner layers 23 of the main circuit board 20. A via
`respectively.
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`hole and a wiring layer may be formed via another inner layer
`Further, regarding a remaining connection and construc-
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`23. of the inner layers according to a design ed condition
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`25 tion, namely, connection of the rectifying unit 130 and the
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`As an alternative, the rectifying unit 13 and the charging
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`ter­charging unit 150 and connection of a battery charging
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`unit 15 may be provided on the second outermost layer 21b on
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`minal 150a connected to the charging unit 150 and a batte
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`a lower surface of the main circuit board 20. In this case, the
`ry
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`are substantially the same as those described above.
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`rectifying unit 13 and the charging unit 15 may connect with
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`In the meantime, when the secondary coil unit 110 is
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`one or more via holes and the secondary coil unit 11 through
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`30 formed at an inner layer 230a under the first outermost layer
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`wiring layers formed in inner layers 23.
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`210a of the main circuit board 200, the inner layer 230a is
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`side view illustrating a FIG. 5 is a fragmentary sectional
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`disposed facing an upper end of the contactless charger 500 as
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`portable terminal with a contactless charger and a contactless
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`illustrated in FIG. 5.
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`charging apparatus engaging therewith according to an exem­
`are equally appli­The foregoing exemplary embodiments
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`plary embodiment of the present invention.
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`cable to a RIGID Flexible Printed Circuit Board (RIGID
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`Referring to FIG. 5, a contactless charger 500 includes a 35
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`FPCB) connected to an LCD Sa of a slide unit 5 of the
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`power cord 530 and a power transmitter 510. In this case, the
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`portable terminal 1.
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`power cord 530 connects with an external power supply. The
`As illustrated previously, coil units 11 and 110 may be
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`power transmitter 510 forms a magnetic induction field such
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`formed on the main circuit boards 20 and 200 in a patterning
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`that an induced electromotive force is generated in the sec­
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`process to improve durability against a shock short-circuit,
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`ondary coil unit 11 of the portable terminal 1 inside the
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`respectively. Furthermore, coil unit 110 may be formed in any
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`contactless charger 500 using the external power supply.
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`of the plurality of shapes and materials as described with
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`The power transmitter 510 includes a primary coil unit
`511
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`regard to coil unit 11.
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`terminal similar to the secondary coil unit 11 of the portable
`of the The above described exemplary embodiments
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`1. That is, the induced electromotive force is generated in the
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`present invention provide an apparatus that increases the con­
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`terminal 1 by the mag-secondary coil unit 11 of the portable
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`venience of a portable terminal to a user. More specifically, by
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`511 of the netic induction field formed in the primary coil unit
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`excluding a separate external charging component, which
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`power transmitter 510.
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`may be eliminated by including coil units 11 and 110 in a
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`When the secondary coil unit 11 is formed at the first
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`portable terminal, it may remarkably reduce a thickness of the
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`outermost layer 21a of an upper surface of the main circuit
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`portable terminal.
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`board 20, the main circuit board 20 may be disposed in a 50
`While the invention has been shown and described with
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`direction such that the first outermost layer 21a on which the
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`thereof, it will reference to certain exemplary embodiments
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`charger 11 is formed faces the contactless secondary coil unit
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`be understood by those skilled in the art that various changes
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`500. Namely, the first outermost layer 21a of the main circuit
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`board 20 on which the coil layer lla is disposed is configured
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`in form and details may be made therein without departing
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`from the spirit and scope of the invention as defined in the
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`to face downwards toward an upper surface of the contactless
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`appended claims and their equivalents.
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`charger 500. This is performed to easily receive a magnetic
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`induction field and to minimize electromagnetic interference.
`What is claimed is:
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`FIG. 6 is a perspective view illustrating a configuration of
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`a contactless charging apparatus mounted on a main circuit
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`the apparatus comprising:
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`of the 60 board according to another exemplary embodiment
`a main circuit board comprising a circuit wiring formed
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`present invention.
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`thereon through a patterning process;
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`Referring to FIG. 6, a secondary coil unit 110 may be
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`a rectifying unit formed at an outermost layer of the main
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`formed at one of inner layers 230 of a main circuit board 200.
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`circuit board;
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`110 may be formed on an inner The secondary coil unit
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`a charging unit formed at the outermost layer of the main
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`layer 230 in a case in which its formation on either of the 65
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`circuit board and electrically connected to the rectifying
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`outermost layers 210a and 210b of upper and lower surfaces
`unit; and
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`of the main circuit board 200 would cause interference with a
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`1. A contactless charging apparatus of a portable terminal,
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`Ex.1005
`APPLE INC. / Page 10 of 11
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`8
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`US 8,941,352 B2
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`7
`an electromo­configured to generate a secondary coil unit
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`in tive force which is induced by a primary coil mounted
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`a contactless charger, and to be formed at an inner layer
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`under the outermost layer among inner layers of the
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`main circuit board through the patterning process and 5
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`electrically connected to the rectifying unit through via
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`holes and a wiring layer,
`comprises a coil layer wherein the secondary coil unit
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`spirally formed on a portion of the main circuit board.
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`2. The apparatus of claim 1, wherein the secondary coil unit 10
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`comprises a conductive material.
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`3. The apparatus of claim 1, wherein the secondary coil unit
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`comprises a coil layer having a shape of at least one of a circle,
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`an ellipse, a hexagon, and a square.
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`4. The apparatus of claim 3, wherein the secondary coil unit 15
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`comprises a conductive material.
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`5. The apparatus of claim 1, wherein the secondary coil unit
`is formed on an inner layer of the main circuit board.
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`6.The apparatus of claim 5,
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`wherein both ends of the secondary coil unit are electri-
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`cally connected to a connecting terminal of the rectify­
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`ing unit through the via holes and the wiring layer,
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`respectively.
`7. The apparatus of claim 1, wherein the contactless charg­
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`ing apparatus is provided in a baseband block to reduce elec-25
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`tromagnetic interference with a Radio Frequency (RF) block
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`on the main circuit board.
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`20
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`* * * * *
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`Ex.1005
`APPLE INC. / Page 11 of 11
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