USOO966 7086B2
`
`(12) United States Patent
`Koyanagi et al.
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 9,667,086 B2
`May 30, 2017
`
`(54) MOBILE TERMINAL
`(71) Applicant: Panasonic Intellectual Property
`Management Co., Ltd., Osaka (JP)
`(72) Inventors: Yoshio Koyanagi, Kanagawa (JP);
`Koichi Yamamoto, Kanagawa (JP);
`Takanori Hirobe, Ishikawa (JP);
`Hiroyuki Uejima, Ishikawa (JP);
`Kenichiro Tabata, Oita (JP); Shuichiro
`Yamaguchi, Oita (JP); Munenori
`Fujimura, Oita (JP); Akio Hidaka,
`Fukuoka (JP); Takumi Naruse,
`Miyazaki (JP)
`
`(*) Notice:
`
`(73) Assignee: Panasonic Intellectual Property
`Management Co., Ltd., Osaka (JP)
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`(21) Appl. No.:
`14/410,556
`(22) PCT Filed:
`May 24, 2013
`(86). PCT No.:
`PCT/UP2013/003317
`S 371 (c)(1),
`Dec. 22, 2014
`(2) Date:
`(87) PCT Pub. No.: WO2014/002374
`PCT Pub. Date: Jan. 3, 2014
`
`(65)
`
`(30)
`
`Prior Publication Data
`US 2015/0326057 A1
`Nov. 12, 2015
`Foreign Application Priority Data
`
`Jun. 28, 2012 (JP) ................................. 2012-1459.62
`
`(51) Int. Cl.
`H02. 702
`H02. 700
`
`(2016.01)
`(2006.01)
`(Continued)
`
`
`
`(52) U.S. Cl.
`CPC ............ H02J 7/025 (2013.01); H0IF 27/365
`(2013.01); H01F 38/14 (2013.01);
`(Continued)
`(58) Field of Classification Seal, 7/O25: HO2J 5/005
`' ' "..."r
`s
`(Continued)
`References Cited
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`(Continued)
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`OTHER PUBLICATIONS
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`International Search Report dated Jun. 18, 2013, for corresponding
`International Application No. PCT/JP2013/003317, 2 pages.
`(Continued)
`Primary Examiner — Drew A Dunn
`Assistant Examiner — Sailesh Thapa
`(74) Attorney, Agent, or Firm — Seed IP Law Group LLP
`(57)
`ABSTRACT
`A mobile terminal is provided with a housing, a battery pack,
`and a secondary-side non-contact charging module. In a plan
`view along the thickness direction of the housing, the battery
`pack is arranged in a first area, and the secondary-side
`non-contact charging module is arranged in a second area
`that is adjacent to the first area. The secondary-side non
`contact charging module overlaps with the intersection of a
`center line for the second area, said center line following the
`direction in which the first area and the second area are
`adjacent to each other, and a center line for the width
`direction of the housing, said center line being orthogonal to
`(Continued)
`
`48a
`
`Ex.1014
`APPLE INC. / Page 1 of 33
`
`

`

`US 9,667,086 B2
`Page 2
`
`the direction in which the first area and the second area are
`adjacent to each other in the second area.
`
`9 Claims, 16 Drawing Sheets
`
`(2006.01)
`(2006.01)
`(2006.01)
`(2016.01)
`(2006.01)
`(2006.01)
`
`(51) Int. Cl.
`HIM IO/46
`H04M I/02
`HOLM 2/10
`H02 50/0
`HOIF 27/36
`HOIF 38/4
`(52) U.S. Cl.
`CPC ......... H0 IM 2/1066 (2013.01); H0 IM 10/46
`(2013.01); H02J 7/007 (2013.01); H02J
`7/0052 (2013.01); H02J 50/10 (2016.02);
`H04M I/0262 (2013.01); H04M 2250/04
`(2013.01)
`
`(58) Field of Classification Search
`USPC .......................................................... 32Of 108
`See application file for complete search history.
`
`
`
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`
`Ex.1014
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`U.S. Patent
`
`May 30, 2017
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`Sheet 1 of 16
`
`US 9,667,086 B2
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`Ex.1014
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`U.S. Patent
`
`May 30, 2017
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`Sheet 2 of 16
`
`US 9,667,086 B2
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`
`
`(A)
`
`(B)
`
`FIG. 2
`
`Ex.1014
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`

`

`U.S. Patent
`
`May 30, 2017
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`Sheet 3 of 16
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`US 9,667,086 B2
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`LT
`
`2
`
`
`
`
`
`
`
`
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`Ex.1014
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`U.S. Patent
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`May 30, 2017
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`Sheet 4 of 16
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`US 9,667,086 B2
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`Ex.1014
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`U.S. Patent
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`May 30, 2017
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`Sheet S of 16
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`US 9,667,086 B2
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`
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`Ex.1014
`APPLE INC. / Page 8 of 33
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`U.S. Patent
`
`May 30, 2017
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`Sheet 6 of 16
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`US 9,667,086 B2
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`Ex.1014
`APPLE INC. / Page 9 of 33
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`U.S. Patent
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`May 30, 2017
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`US 9,667,086 B2
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`U.S. Patent
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`May 30, 2017
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`Sheet 10 of 16
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`US 9,667,086 B2
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`1.
`MOBILE TERMINAL
`
`TECHNICAL FIELD
`
`The present invention relates to a mobile terminal which
`includes a non-contact charging module including a non
`contact charging module and an NFC antenna.
`
`BACKGROUND ART
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`In recent years, NFC (Near Field Communication) anten
`nas that utilize RFID (Radio Frequency IDentification)
`technology and use radio waves in the 13.56 MHz band and
`the like are being used as antennas that are mounted in
`communication apparatuses such as mobile terminal
`devices. To improve the communication efficiency, an NFC
`antenna is provided with a magnetic sheet that improves the
`communication efficiency in the 13.56 MHz band and thus
`configured as an NFC antenna module. Technology has also
`been proposed in which a non-contact charging module is
`mounted in a communication apparatus, and the communi
`cation apparatus is charged by non-contact charging.
`According to this technology, a power transmission coil is
`disposed on the charger side and a power reception coil is
`provided on the communication apparatus side, electromag
`netic induction is generated between the two coils at a
`frequency in a band between approximately 100 kHz and
`200 kHz to thereby transfer electric power from the charger
`to the communication apparatus side. To improve the com
`munication efficiency, the non-contact charging module is
`30
`also provided with a magnetic sheet that improves the
`efficiency of communication in the band between approxi
`mately 100 kHz and 200 kHz.
`Mobile terminals that include such NFC modules and
`non-contact charging modules have also been proposed (for
`example, see PTL 1).
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`CITATION LIST
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`Patent Literature
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`PTL 1
`Japanese Patent No. 4669560
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`SUMMARY OF INVENTION
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`Technical Problem
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`The term “NFC refers to short-range wireless commu
`nication that achieves communication by electromagnetic
`50
`induction using a frequency in the 13.56 MHz band. Further,
`non-contact charging transmits power by electromagnetic
`induction using a frequency in a band between approxi
`mately 100 kHz and 200 kHz. Accordingly, an optimal
`magnetic sheet for achieving highly efficient communication
`(power transmission) in the respective frequency bands
`differs between an NFC module and a non-contact charging
`module. On the other hand, since both the NFC module and
`the non-contact charging module perform communication
`(power transmission) by electromagnetic induction, the NFC
`module and the non-contact charging module are liable to
`interfere with each other. That is, there is a possibility that
`when one of the modules is performing communication, the
`other module will take some of the magnetic flux, and there
`is also the possibility that an eddy current will be generated
`in the other coil and weaken electromagnetic induction of
`the one module that is performing communication.
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`Therefore, in PTL 1, the NFC module and the non-contact
`charging module each include a magnetic sheet and are each
`arranged as a module, which in turn hinders miniaturization
`of the communication apparatus. The communication direc
`tions of the NFC module and the non-contact charging
`module are made to differ so that mutual interference does
`not arise when the respective modules perform communi
`cation, and as a result the communication apparatus is
`extremely inconvenient because the communication Surface
`changes depending on the kind of communication. In addi
`tion, in recent years there has been an increase in the use of
`Smartphones in which a large proportion of one surface of
`the casing serves as a display portion, so that if the afore
`mentioned communication apparatus is applied to a Smart
`phone it is necessary to perform one of the kinds of
`communication on the Surface where the display section
`exists.
`Also, when the non-contact charging module is provided
`in the mobile terminal, downsizing the mobile terminal is
`difficult and there is a room for improvement.
`An object of the present invention is to provide a mobile
`terminal that may achieve a reduction of thickness by
`making a non-contact charging coil, an NFC antenna, and a
`magnetic sheet into a single module, and that may achieve
`a communication and a power transmission in the same
`direction. Also, another object of the present invention is to
`improve both power transmission efficiency of the non
`contact charging and communication efficiency of NFC
`communication by laminating two types of magnetic sheets.
`
`Solution to Problem
`
`The mobile terminal of the present invention comprises a
`housing, a battery pack contained in the housing, and a
`non-contact charging module contained in the housing.
`The non-contact charging module includes a charging coil
`formed of a wound conducting wire, an NFC coil arranged
`So as to Surround the charging coil, a first magnetic sheet
`Supporting the charging coil, and a second magnetic sheet
`placed on the first magnetic sheet and Supporting the NFC
`coil. The battery pack is arranged in a first area in a plane
`normal to a thickness direction of the housing, and the
`non-contact charging module is arranged in a second area
`adjacent to the first area. The non-contact charging module
`overlaps with a cross point between a first center line of the
`second area, which extends in parallel to an interface
`between the first area and the second area, and a second
`center line of the second area, which extends orthogonal to
`the interface and extends in a width direction of the housing.
`The battery pack is arranged in the first area and the
`non-contact charging module is arranged in the second area.
`Therefore, the battery pack and the non-contact charging
`module are arranged adjacent to each other. Thus, connect
`ing the battery pack to the non-contact charging module may
`be easy.
`The non-contact charging module overlaps with a cross
`point between the first center line of the second area, which
`extends in parallel to an interface between the first area and
`the second area, and a second center line of the second area,
`which extends in a width direction of the housing.
`Therefore, weight imbalance caused by non-contact
`charging module in the interface direction of housing may be
`avoided.
`The mobile terminal of the present invention comprises a
`housing, a battery pack contained in the housing, and a
`non-contact charging module contained in the housing. The
`non-contact charging module includes a charging coil
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`3
`formed of a wound conducting wire, an NFC coil arranged
`So as to Surround the charging coil, a first magnetic sheet
`Supporting the charging coil, and a second magnetic sheet
`placed on the first magnetic sheet and Supporting the NFC
`coil. The battery pack is arranged in a first area in a plane
`normal to a thickness direction of the housing, and the
`non-contact charging module is arranged in a second area
`adjacent to the first area. The non-contact charging module
`overlaps with a cross point between a first center line of the
`second area, which extends in parallel to an interface
`between the first area and the second area, and a second
`center line of the second area, which extends orthogonal to
`the interface and extends in a width direction of the battery
`pack.
`The battery pack is arranged in the first area and the
`non-contact charging module is arranged in the second area.
`Therefore, the battery pack and the non-contact charging
`module are arranged adjacent to each other. Thus, connect
`ing the battery pack to the secondary-side non-contact
`charging module may be easy.
`The non-contact charging module overlaps with a cross
`point between the first center line of the second area, which
`extends in parallel to an interface between the first area and
`the second area, and a second center line of the second area,
`which extends in a width direction of the battery pack.
`Therefore, weight imbalance caused by non-contact
`charging module in the interface direction of battery pack
`may be avoided.
`The mobile terminal of the present invention comprises a
`housing, a battery pack contained in the housing, and a
`non-contact charging module contained in the housing. The
`non-contact charging module includes a charging coil
`formed of a wound conducting wire, an NFC coil arranged
`So as to Surround the charging coil, a first magnetic sheet
`Supporting the charging coil, and a second magnetic sheet
`placed on the first magnetic sheet and Supporting the NFC
`coil. The battery pack is arranged in a first area in a plane
`normal to a thickness direction of the housing, and the
`non-contact charging module is arranged in a second area
`adjacent to the first area. The non-contact charging module
`is arranged on a side closer to the first area relative to a first
`center line of the second area extending in parallel to an
`interface between the first area and the second area.
`The battery pack is arranged in the first area and the
`non-contact charging module is arranged in the second area.
`Therefore, the battery pack and the non-contact charging
`module are arranged adjacent to each other. Thus, connect
`ing the battery pack to the non-contact charging module may
`be easy.
`The non-contact charging module is arranged on a side
`closer to the first area relative to the first center line of the
`second area extending in parallel to the interface between
`the first area and the second area.
`Therefore, the weight of non-contact charging module is
`not biased to an opposite side of the first area relative to the
`first center line of the second area. Thus, causing discomfort
`to a user may be avoided.
`Advantageous Effects of Invention
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`that can ease adverse effects by modularization and that also
`enable communication and power transmission in the same
`direction.
`
`BRIEF DESCRIPTION OF DRAWINGS
`
`FIG. 1 is an exploded perspective view of a mobile
`terminal according to a first embodiment of the present
`invention.
`FIG. 2A is a plane view of a mobile terminal and FIG. 2B
`is a side view of a mobile terminal according to a first
`embodiment.
`FIG. 3 is a cross-section view of a circuit board and a
`secondary-side non-contact charging module of a first
`embodiment.
`FIGS. 4A to 4E are an exploded view of a secondary-side
`non-contact charging module according to a first embodi
`ment.
`FIGS. 5A to 5D illustrate relations between a primary
`side non-contact charging module that includes a magnet,
`and a charging coil;
`FIG. 6 illustrates a relation between the size of an inner
`diameter of a hollow portion of a charging coil and an L
`value of the charging coil when an outer diameter of the
`hollow portion of the charging coil is kept constant with
`respect to a case where a magnet is provided in a primary
`side non-contact charging module and a case where a
`magnet is not provided therein.
`FIG. 7 illustrates a relation between an L value of a
`charging coil and a percentage of hollowing of a center
`portion with respect to a case where a magnet is provided in
`a primary-side non-contact charging module and a case
`where a magnet is not provided therein.
`FIGS. 8A to 8D illustrate a secondary-side non-contact
`charging module according to a first embodiment.
`FIG. 9 is a schematic diagram illustrating a first magnetic
`sheet that includes an L-shaped slit according to a first
`embodiment.
`FIGS. 10A to 10C illustrate a frequency characteristic of
`a first magnetic sheet and a second magnetic sheet according
`to a first embodiment.
`FIG. 11 is a plane view explaining a charger which
`charges a secondary-side non-contact charging module
`according to a first embodiment.
`FIG. 12 is a perspective view illustrating an example of
`charging a secondary-side non-contact charging module
`according to a first embodiment.
`FIG. 13 is a plane view of a mobile terminal according to
`a second embodiment.
`FIG. 14 is a plane view of a mobile terminal according to
`a third embodiment.
`
`DESCRIPTION OF EMBODIMENT
`
`An embodiment of a mobile terminal according to an
`embodiment of the present invention will be described with
`reference to the accompanying drawings.
`
`US 9,667,086 B2
`
`According to the present invention, a non-contact charg
`ing module and a communication apparatus that enable a
`reduction in size by making a non-contact charging coil, an
`NFC antenna, and a magnetic sheet into a single module,
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`The First Embodiment
`
`As shown in FIG. 1, a mobile terminal 10 includes a
`housing 11, a communicating hole 12 through which the
`inside and the outside of the housing 11 communicate, a
`camera unit 16 mounted on a circuit board 14, a battery pack
`housed in the housing 11, and a secondary-side non-contact
`charging module (non-contact charging module) 20.
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`Furthermore, the mobile terminal 10 includes a heat
`dissipating sheet 22 (which is shown in FIG. 2B) provided
`on the secondary-side non-contact charging module 20, a
`display unit 24 provided at a side of an aperture 11A of the
`housing 11A, and a protection cover 26 covering the display
`unit 24.
`As described in FIGS. 2A and 2B, the housing 11 is
`formed into a Substantially rectangular shape in a plane
`normal to a thickness direction of the housing 11. The
`housing 11 includes a first area positioned at the opposite of
`the communicating hole 12 in a plane normal and a second
`area 32 positioned adjacent to the first area 31.
`The battery pack 18 is located in the first area 31 and the
`secondary-side non-contact charging module 20 and the
`camera unit 16 are located in the second area 32.
`As described in FIG. 3, the circuit board 14 includes a
`base substrate 34 located in the second area 32 of the
`housing 11 and a plurality of electronic components which
`are located on a side 34A facing the secondary-side non
`contact charging module 20.
`Also, the circuit board 14 is provided with a shield case
`36 covering the plurality of electronic components which are
`located on the side 34A facing the secondary-side non
`contact charging module 20.
`The camera unit 16 is located on the side 34A facing the
`secondary-side non-contact charging module 20 of the base
`Substrate 34 and includes a camera module capable of taking
`an image through the communicating hole 12.
`As describe in FIGS. 2A and 2B, the battery pack 18 is
`formed into a Substantially rectangular shape and located in
`the first area 31 in a plane normal to the thickness direction
`of the housing 11.
`As described in FIG. 4A, the secondary-side non-contact
`charging module 20 is located in the second area 32 of the
`housing 11 (as shown in FIG. 2A). And the secondary-side
`non-contact charging module 20 includes a charging coil 41
`that includes a wound conducting wire 42 and a NFC coil 43
`that is disposed so as to Surround charging coil 41.
`Also, the secondary-side non-contact charging module 20
`includes a first magnetic sheet 44 that Supports the charging
`coil 41 and a second magnetic sheet 45 that is placed the
`NFC coil 43 from the same direction.
`An insulative double-faced tape or adhesive or the like is
`used to adhere the upper face of first magnetic sheet 44 and
`the lower face of second magnetic sheet 45, to adhere the
`upper face of first magnetic sheet 44 and the lower face of
`the charging coil 41, and to adhere the upper face of second
`magnetic sheet 45 and the lower face of the NFC coil 43. It
`is advantageous to arrange the entire charging coil 41 on first
`magnetic sheet 44 so as not to protrude therefrom, and to
`arrange the entire NFC coil 43 on second magnetic sheet 45
`So as not to protrude therefrom. It is advantageous to arrange
`second magnetic sheet 45 so as not to protrude from first
`magnetic sheet 44. Adopting Such a configuration can
`improve the communication efficiency of both the charging
`coil 41 and the NFC coil 43. Note that slit 48 is formed in
`first magnetic sheet 44. The shape of slit 48 may be the shape
`shown in FIG. 4A (a shape as shown in FIG. 9 that is
`described later), or may be the shape shown in FIG. 4D.
`Also, in FIG. 4A, although the slit 48 does not extend to a
`center portion 44B, the slit 48 may extend to a center portion
`44B. This may enable a whole of two leg portions 432a and
`432b to be completely housed in the slit 48.
`The following is an detailed explanation of the charging
`coil 41, the NFC coil 43, the first magnetic sheet 44, and the
`second magnetic sheet 45.
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