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`US009735606B2
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`
`a2) United States Patent
`
`
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`US 9,735,606 B2
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`
`(0) Patent No.:
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`Koyanagiet al.
`Aug. 15, 2017
`(45) Date of Patent:
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`(54) MOBILE TERMINAL INCLUDING
`CHARGING COIL AND WIRELESS
`
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`COMMUNICATION COIL, WIRELESS
`
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`CHARGING MODULE INCLUDING
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`CHARGING COIL AND WIRELESS
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`COMMUNICATION COIL
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`(71) Applicant: Panasonic Intellectual Property
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`Management Co., Ltd., Osaka (JP)
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`(72)
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`Inventors: Yoshio Koyanagi, Kanagawa (JP);
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`Koichi Yamamoto, Kanagawa (JP);
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`Takanori Hirobe, Ishikawa (JP);
`
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`Hiroyuki Uejima, Ishikawa (JP);
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`Kenichiro Tabata, Oita (JP); Shuichiro
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`Yamaguchi, Oita (JP); Munenori
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`Fujimura, Oita (JP); Akio Hidaka,
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`Fukuoka (JP); Takumi Naruse,
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`Miyazaki (JP)
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`(73) Assignee: Panasonic Intellectual Property
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`Management Co., Ltd., Osaka (JP)
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`(51)
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`Int. Cl.
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`HO2J5 7/02
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`HO02J 7/00
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`(2016.01)
`(2006.01)
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`(Continued)
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`(52) U.S. Cl.
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`CPC ween HO02F 7/025 (2013.01); HO2T 5/005
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`(2013.01); HO2J 7/007 (2013.01); H02T
`
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`7/0052 (2013.01);
`
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`(Continued)
`
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`
`(58) Field of Classification Search
`CPC we H02J 7/025; H02J 7/007; H02J 7/0052;
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`HO02J 5/005; HOSK 7/20509;
`
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`(Continued)
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`(56)
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`Subject to any disclaimer, the term ofthis
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`Primary Examiner — Richard Isla Rodas
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`(74) Attorney, Agent, or Firm — Seed IP Law Group LLP
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`Prior Publication Data
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`
`ABSTRACT
`(57)
`
`
`
`
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`
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`is provided with a housing, a circuit
`A mobile terminal
`US 2015/0326056 Al=Nov. 12, 2015
`
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`substrate, a secondary-side non-contact charging module,
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`and a heat dissipating sheet. The circuit substrate comprises
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`a substrate, an electronic componentthat is mounted to the
`
`(Continued)
`
`(30)
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`
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`Foreign Application Priority Data
`
`
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`
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`Jun. 28, 2012
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`(IP) vc eeecneeeseeteneees 2012-145961
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`Page | of 34
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`SAMSUNG EXHIBIT1010
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`Page 1 of 34
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`SAMSUNG EXHIBIT 1010
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`

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`US 9,735,606 B2
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`Page 2
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`Beart et al.
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`Partovi
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`Soar
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`substrate, and a shield case that covers the electronic com-
`
`
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`
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`ponent. The heat dissipation sheet is in contact with the
`
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`
`
`
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`shield case.
`
`
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`
`
`2 Claims, 16 Drawing Sheets
`
`
`
`(51)
`
`
`
`(2006.01)
`(2006.01)
`(2016.01)
`(2006.01)
`
`
`
`
`
`
`
`
`Int. Cl.
`
`
`HO5K 7/20
`
`
`H04B 5/00
`
`
`F027 5/00
`
`
`GO6F 1/20
`
`
`(52) U.S. Cl.
`
`
`
`
`
`CPC ...... H04B 5/0037 (2013.01); HO4B 5/0081
`
`
`
`
`
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`(2013.01); HOSK 7/20509 (2013.01); GO6F
`
`
`
`
`
`1/203 (2013.01); HO4M 2250/04 (2013.01)
`
`
`
`
`
`
`(58) Field of Classification Search
`
`CPC wee HO04B 5/0081; H04B 5/0037; HO4M
`
`
`
`
`
`
`
`2250/04; GO6F 1/203
`
`
`
`USPC iececcsessesescrstcteescseeseeenecnees 320/108; 307/104
`
`
`
`
`See application file for complete search history.
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`m
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`m
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`9/2006
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`7/2010
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`8/2010
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`9/2010
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`9/2010
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`10/2010
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`10/2010
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`12/2010
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`12/2010
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`2/2011
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`2/2011
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`3/2011
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`5/2011
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`9/2011
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`9/2011
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`10/2011
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`Page 2 of 34
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`US 9,735,606 B2
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`US 9,735,606 B2
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`FIG. 8A
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`FIG. 8D
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`US 9,735,606 B2
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`48a
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`Sheet 10 of 16
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`US 9,735,606 B2
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`U.S. Patent
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`US 9,735,606 B2
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`Sheet 14 of 16
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`FIG. 12
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`FIG. 13
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`US 9,735,606 B2
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`FIG. 14
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`1
`MOBILE TERMINAL INCLUDING
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`CHARGING COIL AND WIRELESS
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`COMMUNICATION COIL, WIRELESS
`CHARGING MODULE INCLUDING
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`CHARGING COIL AND WIRELESS
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`COMMUNICATION COIL
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`TECHNICAL FIELD
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`The present invention relates to a mobile terminal which
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`includes a non-contact charging module including a non-
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`contact charging module and an NFC antenna.
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`BACKGROUND ART
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`In recent years, NFC (Near Field Communication) anten-
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`nas that utilize RFID (Radio Frequency IDentification)
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`technology and use radio wavesin the 13.56 MHz band and
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`the like are being used as antennas that are mounted in
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`communication apparatuses
`such as mobile terminal
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`devices. To improve the communication efficiency, an NFC
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`antenna is provided with a magnetic sheet that improves the
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`communication efficiency in the 13.56 MHz band and thus
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`configured as an NFC antenna module. Technology hasalso
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`been proposed in which a non-contact charging module is
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`mounted in a communication apparatus, and the communi-
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`cation apparatus
`is charged by non-contact charging.
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`According to this technology, a power transmission coil is
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`disposed on the charger side and a powerreception coil is
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`netic induction is generated between the two coils at a
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`frequency in a band between approximately 100 kHz and
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`200 kHz to thereby transfer electric power from the charger
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`to the communication apparatus side. To improve the com-
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`munication efficiency, the non-contact charging module is
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`that
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`improves the
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`efficiency of communication in the band between approxi-
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`mately 100 kHz and 200 kHz.
`Mobile terminals that include such NFC modules and
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`non-contact charging modules have also been proposed (for
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`CITATION LIST
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`Patent Literature
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`PTL 1
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`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-
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`nication that achieves communication by electromagnetic
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`induction using a frequencyin the 13.56 MHz band.Further,
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`non-contact charging transmits power by electromagnetic
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`induction using a frequency in a band between approxi-
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`mately 100 kHz and 200 kHz. Accordingly, an optimal
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`magnetic sheet for achieving highly efficient communication
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`(power transmission) in the respective frequency bands
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`differs between an NFC module and a non-contact charging
`module. On the other hand, since both the NFC module and
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`the non-contact charging module perform communication
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`(powertransmission) by electromagnetic induction, the NFC
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`module and the non-contact charging module are liable to
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`interfere with each other. That is, there is a possibility that
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`2
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`when one of the modules is performing communication, the
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`other module will take some of the magnetic flux, and there
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`is also the possibility that an eddy current will be generated
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`in the other coil and weaken electromagnetic induction of
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`the one module that is performing communication.
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`Therefore, in PTL 1, the NFC module and the non-contact
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`charging module each include a magnetic sheet and are each
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`arranged as a module, which in turn hinders miniaturization
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`of the communication apparatus. The communication direc-
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`tions of the NFC module and the non-contact charging
`module are madeto differ so that mutual interference does
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`not arise when the respective modules perform communi-
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`cation, and as a result
`the communication apparatus is
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`extremely inconvenient because the communication surface
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`changes depending on the kind of communication. In addi-
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`tion, in recent years there has been an increase in the use of
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`smartphones in which a large proportion of one surface of
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`the casing serves as a display portion, so that if the afore-
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`mentioned communication apparatus is applied to a smart-
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`is necessary to perform one of the kinds of
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`communication on the surface where the display section
`exists.
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`Also, when the non-contact charging module is provided
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`in the mobile terminal, downsizing the mobile terminal is
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`difficult and there is a room for improvement.
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`An object of the present invention is to provide a mobile
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`terminal
`that may achieve a reduction of thickness by
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`making a non-contact charging coil, an NFC antenna, and a
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`magnetic sheet into a single module, and that may achieve
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`a communication and a power transmission in the same
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`direction. Also, another object of the present invention is to
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`improve both power transmission efficiency of the non-
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`contact charging and communication efficiency of NFC
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`communication by laminating two types of magnetic sheets.
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`Solution to Problem
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`The mobile terminal of the present invention comprises a
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`housing, a circuit board contained in the housing, a non-
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`contact charging module arranged betweenthe circuit board
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`and an internal surface of the housing, and a heat dissipating
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`sheet provided on a side the non-contact charging module
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`facing the circuit board. The non-contact charging module
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`includes a charging coil formed of a wound conducting wire,
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`an NFCcoil arranged so as to surround the charging coil, a
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`first magnetic sheet supporting the charging coil, and a
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`second magnetic sheet placed on thefirst magnetic sheet and
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`supporting the NFC coil.
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`Byproviding the heat dissipating sheet in the non-contact
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`charging module,
`the heat of the non-contact charging
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`module is easily dissipated.
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`The circuit board of the mobile terminal of the present
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`invention includes the base substrate, electronic components
`which are mounted on the base substrate, and the shield case
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`which covers the electronic components, and the heat dis-
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`sipating sheet is in contact with the shield case.
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`The heat dissipating sheet provided in the non-contact
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`charging module is in contact with the shield case. There-
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`fore, the heat of the non-contact charging module is easily
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`dissipated and the heat of the base substrate is easily
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`dissipated.
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`Advantageous Effects of Invention
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`According to the present invention, a non-contact charg-
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`ing module and a communication apparatus that enable a
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`reduction in size by making a non-contact charging coil, an
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`US 9,735,606 B2
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`3
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`NFC antenna, and a magnetic sheet into a single module,
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`that can ease adverse effects by modularization andthat also
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`enable communication and power transmission in the same
`direction.
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`BRIEF DESCRIPTION OF DRAWINGS
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`FIG. 1 is an exploded perspective view of a mobile
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`terminal according to a first embodiment of the present
`invention.
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`FIG. 2A is a plane view of a mobile terminal and FIG. 2B
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`is a side view of a mobile terminal according to a first
`embodiment.
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`FIG. 3 is a cross-section view of a circuit board and a
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`secondary-side non-contact charging module of a first
`embodiment.
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`FIGS. 4Ato 4E are an exploded view of a secondary-side
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`non-contact charging module according to a first embodi-
`ment.
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`FIGS. 5A to 5D illustrate relations between a primary-
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`side non-contact charging module that includes a magnet,
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`and a charging coil;
`FIG.6 illustrates a relation between the size of an inner
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`diameter of a hollow portion of a charging coil and an L
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`value of the charging coil when an outer diameter of the
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`hollow portion of the charging coil is kept constant with
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`respect to a case where a magnet is provided in a primary-
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`side non-contact charging module and a case where a
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`magnet is not provided therein.
`FIG. 7 illustrates a relation between an L value of a
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`charging coil and a percentage of hollowing of a center
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`portion with respect to a case where a magnetis provided in
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`a primary-side non-contact charging module and a case
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`where a magnet is not provided therein.
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`FIGS. 8A to 8D illustrate a secondary-side non-contact
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`charging module according to a first embodiment.
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`FIG.9 is a schematic diagram illustrating a first magnetic
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`sheet that
`includes an L-shaped slit according to a first
`embodiment.
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`FIGS. 10A to 10C illustrate a frequency characteristic of
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`a first magnetic sheet and a second magnetic sheet according
`to a first embodiment.
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`FIG. 11 is a plane view explaining a charger which
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`charges a secondary-side non-contact charging module
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`according to a first embodiment.
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`FIG. 12 is a perspective view illustrating an example of
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`charging a secondary-side non-contact charging module
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`according to a first embodiment.
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`FIG. 13 is a plane view of a mobile terminal according to
`a second embodiment.
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`FIG. 14 is a plane view of a mobile terminal according to
`a third embodiment.
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`DESCRIPTION OF EMBODIMENT
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`An embodiment of a mobile terminal according to an
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`embodimentofthe present invention will be described with
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`reference to the accompanying drawings.
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`The First Embodiment
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`As shown in FIG. 1, a mobile terminal 10 includes a
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`housing 11, a communicating hole 12 through which the
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`inside and the outside of the housing 11 communicate, a
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`camera unit 16 mounted on a circuit board 14, a battery pack
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