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`as) United States
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`a2) Patent Application Publication 10) Pub. No.: US 2016/0126639 Al
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` Kim etal. (43) Pub. Date: May5, 2016
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`US 20160126639A1
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`(54) COTL STRUCTURE AND WIRELESS POWER
`RECEIVING APPARATUS INCLUDING THE
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`SAME
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`
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`Dec. 22, 2014
`
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`
`(KR) wees 10-2014-0186336
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`Publication Classification
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`(72)
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`(51)
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`
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`Int. Cl.
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`HO1Q 21/28
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`HOAW 4/00
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`HOAB 5/00
`
`
`HO010 7/00
`
`HO2J 5/00
`
`
`
`(52) US.CL
`
`
`
`
`
`
`CPC veeeceeeeeeeee HO010 21/28 (2013.01); HO1O 7/00
`
`
`
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`(2013.01); H02J 5/005 (2013.01); H04B
`
`
`
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`5/0037 (2013.01); HO4W4/008 (2013.01)
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`(2006.01)
`(2006.01)
`(2006.01)
`(2006.01)
`(2006.01)
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`(71) Applicant: Samsung Electro-Mechanics Co., Ltd.,
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`Suwon-si (KR)
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`Inventors: Choon Hee Kim, Suwon-Si (KR); Hyun
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`Keun Lim, Suwon-Si (KR); Ki Won
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`Chang, Suwon-Si (KR); Hyung Wook
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`Cho, Suwon-Si (KR); Isaac Nam,
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`Suwon-Si (KR)
`:
`.
`_
`:
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`(73) Assignee: Samsung Electro-Mechanies Co., Ltd.,
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`Suwon-si (KR)
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`ABSTRACT
`(57)
`(21) Appl. No.: 14/878,465
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`(22) A coil structure includesafirst coil configured to transmit orFiled: Oct. 8, 2015
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`receive a first signal of a first frequency, and a second coil
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`configured to transmit or receive a second signal of a second
`Foreign Application Priority Data
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`frequency. The second coil is disposed outsidethe first coil,
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`and a ratio of the second frequencyto the first frequencyis at
`(KR) ones 10-2014-0138595
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`(KR) wee 10-2014-0154800
`least 1.3:1
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`(30)
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`Oct. 14,2014
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`Nov. 7, 2014
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`POWER
`RECEIVING
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`COIL
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`130
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`UNIT
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`POWER
`RECEIVING
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`120
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`WIRELESS
`COMMUNICATIONS
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`COIL
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`UNIT
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`140
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`WIRELESS
`COMMUNICATIONS
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`Page | of 33
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`SAMSUNG EXHIBIT1025
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`SAMSUNG EXHIBIT 1025
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`110
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`POWER
`RECEIVING
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`COIL
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`UNIT
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`130
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`POWER
`RECEIVING
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`120
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`WIRELESS
`COMMUNICATIONS
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`COIL
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`UNIT
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`140
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`WIRELESS
`COMMUNICATIONS
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`FIG. 3
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`110
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`FIRST POWER
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`RECEIVING COIL
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`130
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`POWER
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`UNIT
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`111
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`SECOND POWER
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`RECEIVING COIL
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`120
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`FIRST WIRELESS
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`COMMUNICATIONS
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`121
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`140
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`WIRELESS
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`UNIT
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`RECEIVING
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`COMMUNICATIONS COIL
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`COIL
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`SECOND WIRELESS
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`COMMUNICATIONS
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`FIG. 4
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`FIG. 5
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`FIG. 6
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`FIG. 7
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`RECEIVING
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`UNIT
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`COMMUNICATIONS
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`UNIT
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`130
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` POWER
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`ECEIVING
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`UNIT
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`DD
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`UNIT
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`FIG. 8B
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`LLLLELLLELELLLLLLELLLLELLLLe
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`Yd((
`QD+ Y,
`)
`SOSA
`WS
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`120
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`121
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`Ns
`SRAAQAQQ°iAa©s
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`KLELLLLLLLL
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`FIG. 9
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`FIG. 10
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`Sheet 11 of 23.
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`=US 2016/0126639 Al
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`FIG. 138A
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`FIG. 13B
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`FIG. 130
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`FIG.14D
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`FIG.14C FIG.14B
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`110,120
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`FIG.14A
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`0.80
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`0.60
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`S21(S21@center/S21) 0.20
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`0.40
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`T
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`T
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`T
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`T
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`T
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`Center
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`15%
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`45%
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`65%
`35%
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`DISTANCE (DISTANCE/COIL SIZE)
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`FIG. 15
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`85%
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`100%
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`0.500
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`0.400
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`0.300
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`S21(S21@center/S21) 0.100
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`2 TIMES 38 TIMES 4 TIMES 6 TIMES 8 TIMES 10 TIMES
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`FREQUENCY
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`FIG. 16
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`FIG.17D
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`FIG.17C
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`FIG.17B FIG.17A
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`S21(S21@center/S21)
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`S21(S21@center/S21)
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`Center
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`20%
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`40%
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`60%
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`100%
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`80%
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`DISTANCE (DISTANCE/COIL SIZE)
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`FIG. 18
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`14%
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`100%
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`90%
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`80%
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`10%
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`60%
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`50%
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`40%
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`30%
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`20%
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`10%
`a
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`T TIMES 1.1 TIMES 1.2 TIMES 1.3 TIMES 1.4 TIMES 1.5 TIMES 1.6 TIMES
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`FREQUENCY
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`15%
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`FIG. 19
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`110 120
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`110 120
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`FIG. 20A
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`FIG. 20B
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`FIG. 20C
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`100%
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`=
`90%
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`D © 80%
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`oS 70%
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`5 60%
`ON
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`© = 50%
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`a E 40%
`2 5
`a
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`x2 30%
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`20%
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`10%
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`0%
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`wa
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`100%
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`1 TIMES
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`7.1 TIMES
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`1.2 TIMES
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`1.3 TIMES
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`1.4 TIMES
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`7.5 TIMES
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`1.6 TIMES
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`FREQUENCY
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`FIG. 21
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`100%
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`83
`os
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`OF
`a &
`Xo—Zz
`NI
`wa
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`Page 19 of 33
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`1 TIMES
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`1.4 TIMES
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`1.2 TIMES
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`1.3TIMES
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`1.4 TIMES
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`1.5 TIMES
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`1.6 TIMES
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`FREQUENCY
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`FIG. 22
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`100%
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`Value v
`—-Normalized
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`v
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`v
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`T
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`T
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`1 TIMES
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`1.1 TIMES
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`1.2 TIMES
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`1.3 TIMES
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`1.4 TIMES
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`1.5 TIMES
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`1.6 TIMES
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`FREQUENCY
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`FIG. 23
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`100%
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`90%
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`80%
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`10%
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`60%
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`50%
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`40%
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`30%
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`20%
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`10%
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`0%
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`S21(S21@center/S21)
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`FIG. 24
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`FIG. 27
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`COIL STRUCTURE AND WIRELESS POWER
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`RECEIVING APPARATUS INCLUDING THE
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`SAME
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`CROSS-REFERENCE TO RELATED
`
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`APPLICATION(S)
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`[0001] This application claims the benefit under 35 USC
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`119(a) of Korean Patent Application Nos. 10-2014-0138595
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`filed on Oct. 14, 2014, 10-2014-0154800 filed on Nov. 7,
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`2014, and 10-2014-0186336 filed on Dec. 22, 2014, in the
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`Korean Intellectual Property Office, the entire disclosures of
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`which are incorporated herein by reference for all purposes.
`
`BACKGROUND
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`1. Field
`[0002]
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`[0003] This application relates to a coil structure and a
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`wireless powerreceiving apparatus including the same.
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`2. Description of Related Art
`[0004]
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`[0005]
`In accordance with the development of wireless
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`technology, various wireless functions ranging from the
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`transmission of data to the transmission of power have been
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`implemented.
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`For both the transmission of data and the transmis-
`[0006]
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`sion ofpower, coils are used.In this regard, power is provided
`
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`wirelessly or data is transmitted using a magnetic field
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`
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`induced betweena pairofcoils.
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`[0007] Meanwhile, a mobile terminal to which the wireless
`
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`
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`powertransmission technologyis applied may use additional
`
`
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`coils, in addition to coils for wirelessly transmitting power.
`
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`Therefore, several coils may be used in a single mobile ter-
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`minal, which may cause problems in which interference
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`between the coils occurs and an amountof space required for
`
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`disposing several coils is increased.
`
`SUMMARY
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`[0008] This Summary is provided to introduce a selection
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`of concepts in a simplified form that are further described
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`below in the Detailed Description. This Summary is not
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`intended to identify key features or essential features of the
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`claimed subject matter, noris it intended to be used as an aid
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`in determining the scope of the claimed subject matter.
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`[0009]
`Inone general aspect, a coil structure includesa first
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`coil configured to transmit or receive a first signal of a first
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`frequency; and a second coil configuredto transmitor receive
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`a second signal of a second frequency; wherein the second
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`coil is disposed outsidethefirst coil; and a ratio ofthe second
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`frequencyto the first frequencyis at least 1.3:1.
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`Thefirst coil may be a powerreceiving coil config-
`[0010]
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`ured to operate at a frequency within a 100 kHZ to 275 kHz
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`band; and the second coil may be a wireless communications
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`coil configured to operate at a frequency within 60 kHZ to 80
`kHZ band.
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`[0011] The first coil may include a plurality of windings;
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`and a radius of curvature of an outermost windingofthefirst
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`coil may be greater than a radius of curvature of an innermost
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`windingofthefirst coil.
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`Thefirst coil may be spaced apart from the second
`[0012]
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`coil by a distance of 2 mm to 6 mm.
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`[0013] A number of windingsofthe first coil may be larger
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`than a numberof windingsof the secondcoil.
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`[0014]
`Thefirst coil may have 10 to 14 windings; the sec-
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`ond coil may have 7 to 9 windings; and a distance between the
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`windingsof each ofthefirst coil and the second coil may be
`0.05 mm to 2 mm.
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`[0015]
`Thefirst coil may havea first axis having a length of
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`27 mm to 50mm,anda secondaxis having a length of 27 mm
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`to 100 mm;andthe second coil may havea first axis having a
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`length of 36 mm to 60 mm,and a second axis having a length
`of 36 mm to 120 mm.
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`[0016] The first coil may have an inductance of 7.5 WH to
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`9.5 WH; and the second coil may have an inductance of 10 nH
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`to 12 pH.
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`[0017]
`Thefirst coil may have a line width of 0.55 mm to
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`0.7 mm;and the second coil may have a line width of 0.2 mm
`to 0.5 mm.
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`[0018] The coil structure may further include a third coil
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`disposed outside the first coil and the second coil; and the
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`third coil may be configured to support wireless communica-
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`tions in a near field communication (NFC) scheme.
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`[0019]
`In another general aspect, a wireless powerreceiv-
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`ing apparatus includesa first coil configured to operate as a
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`powerreceiving coil and a wireless communications coil, the
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`first coil being configured to receive a signal of a first fre-
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`quencyas the powerreceiving coil, and transmit or receive a
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`signal of a second frequencyas the wireless communications
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`coil; and a second coil configured to transmit or receive a
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`signal of a third frequency different from thefirst frequency
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`and the second frequency; wherein at least part of the second
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`coil is disposed outsidethefirst coil.
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`[0020] The wireless power receiving apparatus may further
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`include a power receiving unit configured to wirelessly
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`receive powerusingthefirst coil; a wireless communications
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`unit configured to wirelessly transmit or receive data using
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`the first coil; and a switch configured to selectively connect
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`the first coil to the power receiving unit to enable the power
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`receiving unit to wirelessly receive powerusing thefirst coil,
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`and selectively connectthe first coil to the wireless commu-
`nications unit to enable the wireless communications unit to
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`wirelessly transmit or receive data using thefirst coil.
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`[0021] The switch maybe further configured to connectthe
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`first coil to the powerreceiving unit as a default setting.
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`[0022] The wireless power receiving apparatus may further
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`include a driver circuit connected to the first coil; a power
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`receiving unit; a wireless communicationsunit; and a switch
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`configured to selectively connect the driver circuit to the
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`power receiving unit to enable the powerreceiving unit to
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`wirelessly receive powerusing the driver circuit and thefirst
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`coil, and selectively connect the driver circuit to the wireless
`communications unit to enable the wireless communications
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`unit to wirelessly transmit or receive data using the driver
`circuit and thefirst coil.
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`[0023] The second coil may have a samesizeas thefirst
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`coil; and a distance between a center of the first coil and a
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`center ofthe second coil may be at least 60% ofa height ofthe
`first coil.
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`Thefirst coil may be configured to operate as the
`[0024]
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`powerreceiving coil at a frequency within a 100 kHZ to 275
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`kHz band; and the second coil may be a wireless communi-
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`cations coil configured to operate at a frequency within a 60
`kHZ to 80 KHZ band.
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`[0025] Other features and aspects will be apparent from the
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`following detailed description, the drawings, and the claims.
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`Page 25 of 33
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`Page 25 of 33
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`

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`US 2016/0126639 Al
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`May 5, 2016
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`illustrating
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`BRIEF DESCRIPTION OF THE DRAWINGS
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`examples, and are not limited to those set forth herein, but
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`maybe changedas will be apparentto one of ordinary skill in
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`[0026]
`FIG. 1 is a perspective view illustrating an example
`the art, with the exception ofoperations necessarily occurring
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`in which a mobile terminalis wirelessly charged with power.
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`in a certain order. Also, descriptions of functions and con-
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`[0027]
`FIG.2 is a perspective view illustrating an example
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`structions that are well knownto one of ordinary skill in the
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`in which data is transmitted wirelessly by a mobile terminal.
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`art may be omitted for increased clarity and conciseness.
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`[0028] FIG.3is a view illustrating an example of a wireless
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`[0045] The features described herein may be embodied in
`powerreceiving apparatus.
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`different forms, and are not to be construedas being limited to
`[0029]
`FIG.4 is a view illustrating another example of a
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`the examples described herein. Rather,
`the examples
`wireless powerreceiving apparatus.
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`described herein have been provided so that this disclosure
`5 through 13C are views
`[0030]
`FIGS.
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`will be thorough and complete, and will convey the full scope
`examples of coil structures.
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`of the disclosure to one of ordinary skill in the art.
`FIGS. 14A through 14D are views illustrating
`[0031]
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`[0046]
`FIG. 1 is a perspective view illustrating an example
`examplesofdifferent degrees of overlap of a powerreceiving
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`in which a mobile terminalis wirelessly charged with power.
`coil anda wireless communications coil having the same size.
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`[0032]
`FIG. 15isa graphillustrating an example ofa trans-
`[0047]
`In the example illustrated in FIG. 1, a wireless
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`mission efficiency according to the degrees of overlap of
`power receiving apparatus 100 receives power wirelessly
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`FIGS. 14A through 14D.
`transmitted by a wireless power transmitting apparatus 200
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`[0033]
`FIG. 16 isa graphillustrating an example ofa trans-
`and provides the received power to a mobile terminal 10.
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`mission efficiency of the powerreceiving coil and the wire-
`[0048] The wireless power
`receiving apparatus 100
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`less communicationscoil versus frequency ina case in which
`receives powerfrom the wireless powertransmitting appara-
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`the powerreceiving coil and the wireless communications
`tus 200 wirelessly, in a non-contact manner, using a power
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`coil are completely overlapped with each otheras illustrated
`receiving coil 110. The powerreceiving coil 110 resonates
`in FIG. 14A.
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`with a transmitting coil 210 of the wireless power transmit-
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`[0034]
`FIGS. 17A through 17D are views illustrating
`ting apparatus 200 and receives powerwirelessly.
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`examplesofdifferent degrees of overlap of a powerreceiving
`[0049] The wireless powertransmitting apparatus 200 and
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`coil and a wireless communications coil having different
`the wireless powerreceiving apparatus 100 are not limited to
`sizes.
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`using a specific wireless charging standard. For example, the
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`[0035]
`FIG. 18isa graphillustrating an example ofa trans-
`wireless power transmitting apparatus 200 and the wireless
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`mission efficiency according to the degrees of overlap of
`powerreceiving apparatus 100 may be operated using a wire-
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`FIGS. 17A through 17D.
`less charging standard using separate local area wireless com-
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`[0036]
`FIG. 19 isa graphillustrating an example ofa trans-
`munications, such as the A4WPstandard. Alternatively, the
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`mission efficiency of the powerreceiving coil and the wire-
`wireless power transmitting apparatus 200 and the wireless
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`less communicationscoil versus frequency ina case in which
`powerreceiving apparatus 100 may be operated using wire-
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`the powerreceiving coil is disposed completely inside the
`less charging standards that do not use separate local area
`wireless communicationscoil as illustrated in FIG. 17A.
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`wireless communications, such as the WPC and PMAstan-
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`dards.
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`FIGS. 20A through 20C are views illustrating
`[0037]
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`examples of a distance between the powerreceiving coil and
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`FIG. 2 is a perspective view illustrating an example
`[0050]
`the wireless communicationscoil.
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`in which data is transmitted wirelessly by a mobile terminal.
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`illustrating
`[0038]
`FIGS. 21 through 23 are graphs
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`[0051]
`In the example illustrated in FIG. 2, the wireless
`examples of a relative degree of transmission efficiency ver-
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`powerreceiving apparatus 100 of the mobile terminal 10
`sus frequency for the examples of FIGS. 20A through 20C.
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`transmits data (e.g., data corresponding to card information,
`[0039] FIG.241saperspective view illustrating an example
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`of a cover for a mobile terminal.
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`etc.) to a wireless communications apparatus 300 in a non-
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`contact mannerusing a wireless communications coil 120.
`[0040]
`FIG. 251s an exploded perspective view ofthe cover
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`for the mobile terminal illustrated in FIG. 24.
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`[0052]
`In on example, the wireless communications appa-
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`ratus 300 is a magnetic card reader. The magnetic card reader
`[0041]
`FIG. 26isa perspective view illustrating an example
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`of a mobile terminal.
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`obtains card information according to a magnetic recognition
`scheme.
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`[0042]
`FIG. 27 is an exploded perspective view of the
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`mobile terminal illustrated in FIG. 26.
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`[0053]
`Inacaseofa general magnetic card, a magnetic strip
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`[0043] Throughout the drawings and the detailed descrip-
`of the magnetic card is magnetically coupled to a coil 310
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`tion, the same reference numerals refer to the same elements.
`includedin the wireless communications apparatus 300, and
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`The drawings may not be to scale, and the relative size,
`the magnetic card reader obtains the card information from
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`proportions, and depiction of elements in the drawings may
`the magnetic strip using the magnetic interface.
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`be exaggeratedforclarity, illustration, and convenience.
`[0054] Therefore, the magnetic card reader includes a mag-
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`netic coupling enabled coil 310, and, in this example, the
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`wireless communications coil 120 of the wireless power
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`receiving apparatus 100 is magnetically coupled to the coil
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`310 of the magnetic card reader to transmit data.
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`[0055]
`For instance, the wireless communications coil 120
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`of the wireless power receiving apparatus transmits the data
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`through magnetic coupling with the coil 310 of the magnetic
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`card reader. To this end, the wireless powerreceiving appa-
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`ratus 100 transmits the data from the magnetic card reader by
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`DETAILED DESCRIPTION
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`[0044] The following detailed description is provided to
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`assist the reader in gaining a comprehensive understanding of
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`the methods, apparatuses, and/or systems described herein.
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`However, various changes, modifications, and equivalents of
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`the methods, apparatuses, and/or systems described herein
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`will be apparent to one of ordinary skill in the art. The
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`sequences of operations described herein are merely
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`Page 26 of 33
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`Page 26 of 33
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`

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`US 2016/0126639 Al
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`May 5, 2016
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`[0068] The plurality of power receiving coils 110 and 111
`sequentially transmitting wireless communications signals
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`may use the same wireless power communications standard
`correspondingto the data using the wireless communications
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`coil 120.
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`or may use different wireless power communications stan-
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`dards.
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`[0056]
`In another example, the wireless communications
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`[0069] The plurality of wireless communications coils 120
`apparatus 300 supports a predetermined standard for wire-
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`and 121 use different wireless communications standards.
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`lessly receiving data using local area communications. For
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`example, the wireless communications apparatus 300 and the
`[0070] Although the example illustrated in FIG. 4 illus-
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`wireless communications coil 120 of the wireless power
`trates an example in which two powerreceiving coils 110 and
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`111 and two wireless communications coils 120 and 121 are
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`receiving apparatus 100 wirelessly transmit and receive infor-
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`mation using a local area wireless communications standard,
`included,this is merely illustrative. Thus, at least one of the
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`such as a near field communications (NFC) standard or any
`powerreceiving coils (110, 111) and the wireless communi-
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`otherlocal area wireless communications standard knownto
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`cations coil (120, 121) may be provided as a single coil.
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`one of ordinary skill in theart.
`Alternatively, at least one of the powerreceiving coils (110,
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`111) andthe wireless communications coil (120, 121) may be
`[0057] Although FIGS. 1 and 2 illustrate a case in which the
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`providedas three or more coils.
`powerreceiving coil 110 is disposed inside the wireless com-
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`munications coil 120, this is merely illustrative. Hereinafter,
`FIGS.
`5 through 13C are views
`[0071]
`illustrating
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`various examples of the power receiving coil 110 and the
`examples of coil structures that are constituted by the power
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`wireless communications coil 120 will be described in more
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`receiving coil and the wireless communicationscoil.
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`detail.
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`FIG. 5 illustrates the power receiving coil 110 and
`[0072]
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`[0058] FIG.3is a view illustrating an example of a wireless
`the wireless communicationscoil 120 ina state of separation
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`powerreceiving apparatus 100.
`from each other. The example illustrated in FIG. 5 may be
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`[0059] Referring to FIGS. 1 through 3, the wireless power
`applied in a case in which the powerreceiving coil 110 andthe
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`wireless communications coil 120 influence each other. For
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`receiving apparatus 100 includes a powerreceiving coil 110,
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`a powerreceiving unit 130, a wireless communicationscoil
`example, in a case in which the powerreceiving coil 110 and
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`120, and a wireless communications unit 140.
`the wireless communications coil 120 are operated in a simi-
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`lar frequency band, in order to prevent interference between
`[0060] The power receiving coil 110 is magnetically
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`the powerreceiving coil 110 and the wireless communica-
`coupled to the wireless power transmitting apparatus 200 to
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`tions coil 120, a structure of FIG. 5 separating two coils from
`receive powerwirelessly.
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`each other is applied.
`[0061] The powerreceiving unit 130 receives power from
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`[0073]
`FIG. 6 illustrates an example in which the power
`the powerreceiving coil 110.
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`receiving coil 110 and the wireless communications coil 120
`[0062] The wireless communications coil 120 is interfaced
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`with a communications coil of the wireless communications
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`are overlapped with each otherat least partially. The example
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`illustrated in FIG. 6 may be applied ina case in which a degree
`apparatus 300 to perform wireless communications.
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`of mutual influence of the powerreceiving coil 110 and the
`[0063] The wireless communications unit 140 receives data
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`from andtransmits data to the wireless communicationscoil
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`wireless communicationscoil 120 is relatively low, and a size
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`120.
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`of the overlapped region of the powerreceiving coil 110 and
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`the wireless communications coil 120 may be changed
`[0064]
`In one example, the wireless communications coil
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`depending on the influence between the powerreceiving coil
`120 interfaces with the receiving coil 310 to read data stored
`110 and the wireless communications coil 120.
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`on the magnetic strip of the magnetic card. For instance, the
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`[0074]
`FIG. 7 illustrates an example in which one of the
`wireless communications coil 120 operates at a first fre-
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`powerreceiving coil 110 and the wireless communications
`quency adjacent to a second frequency ofthe receiving coil
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`coil 120 is disposed inside the other one. The example illus-
`310 of the magnetic reader. For example, the wireless com-
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`trated in FIG. 7 may be applied in a case in which the influ-
`munications coil 120 is operated within the 60 KHZ to 80 kHZ,
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`band.
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`ence between the powerreceiving coil 110 and the wireless
`communications coil 120 is weak.
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`In one example, the wireless communications unit
`[0065]
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`[0075] The coil structuresillustrated in FIGS. 5 through 7
`140 controls the transmission of data by being magnetically
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`maybe selectively used depending on operating frequencies
`coupled to the receiving coil of the magnetic reader. As
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`ofthe powerreceiving coil 110 and the wireless communica-
`described above, the magnetic reader includes the receiving
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`tions coil 120, or a degree of overlap of the powerreceiving
`coil 310 magnetically coupled to the magnetic strip of the
`coil 110 and the wireless communications coil 120. A
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`magnetic card, and when the magnetic strip passes near the
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`description thereof will be provided below in detail with
`receiving coil 310, data recorded on the magnetic strip is
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`reference to FIGS. 14A through 19.
`provided to the receiving coil 310 through magnetic coupling.
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`Thus, the wireless communications unit 140 performs con-
`FIGS. 5 through 7 illustrate one power receiving
`[0076]
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`coil 110 and one wireless communications coil 120.
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`trolling to sequentially transmit information (e.g., the card
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`information) stored on the magnetic strip of the magnetic
`[0077]
`In one example, the power receiving coil 110 is
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`card. Thus, the magnetic reader receives the sequentially
`operated according to a wireless powerreceiving mode oper-
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`transmitted information just like it would by reading the
`ated at a frequency within the 100 kHZ to 275 kHZ band. For
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