I 1111111111111111 11111 1111111111 111111111111111 IIIII IIIII IIIIII IIII IIII IIII
`US0094614 79B2
`
`c12) United States Patent
`Chae et al.
`
`(IO) Patent No.:
`(45) Date of Patent:
`
`US 9,461,479 B2
`Oct. 4, 2016
`
`(54) WIRELESS POWER TRANSMITTER AND
`WIRELESS POWER TRANSFER METHOD
`THEREOF
`
`(71) Applicant: LG ELECTRONICS INC., Seoul
`(KR)
`
`(72)
`
`Inventors: Beomseok Chae, Seoul (KR);
`Byungsang Jung, Seoul (KR);
`Jeongkyo Seo, Seoul (KR); Kwangmin
`Yoo, Yongin-si (KR); Junyoung Lee,
`Yongin-si (KR)
`
`(73) Assignee: LG ELECTRONICS INC., Seoul
`(KR)
`
`( *) Notice:
`
`Subject to any disclaimer, the term ofthis
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 167 days.
`
`(21) Appl. No.: 14/286,672
`
`(22) Filed:
`
`May 23, 2014
`
`(65)
`
`Prior Publication Data
`
`US 2014/0347008 Al
`
`Nov. 27, 2014
`
`(30)
`
`Foreign Application Priority Data
`
`May 27, 2013
`
`(KR) ........................ 10-2013-0059894
`
`(51)
`
`Int. Cl.
`H0lM 10144
`H0lM 10146
`H02J 5100
`H02J 7102
`H02J 17100
`H02J 7100
`(52) U.S. Cl.
`CPC .............. H02J 51005 (2013.01); H02J 710081
`
`(2006.01)
`(2006.01)
`(2016.01)
`(2016.01)
`(2006.01)
`(2006.01)
`
`190
`I
`POWER SUPPLY
`UNJT
`
`POffl:R CONVlcRSION
`UNIT
`
`113
`
`MODULATION/
`DEMODUl./.'l'lON UKlT
`
`(2013.01); H02J 710093 (2013.01); H02J
`71025 (2013.01); H02J 17100 (2013.01); H02J
`2007/0096 (2013.01)
`(58) Field of Classification Search
`CPC ................................. H02J 5/005; H02J 7/025
`USPC .......................................................... 320/108
`See application file for complete search history.
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`2007/0059957 Al
`2014/0203774 Al*
`
`3/2007 Choi
`7/2014 Sawayanagi .
`
`2015/0236539 Al
`
`8/2015 Park et al.
`
`H02J 7/0004
`320/108
`
`FOREIGN PATENT DOCUMENTS
`
`CN
`CN
`WO
`WO
`WO
`
`1941547 A
`102593883 A
`WO 2011/156768 A2
`WO 2013/046391 Al
`WO 2013046391 Al *
`
`4/2007
`7/2012
`12/2011
`4/2013
`4/2013
`
`* cited by examiner
`
`............ H02J 7/0004
`
`Primary Examiner - Richard Isla Rodas
`Assistant Examiner - Tikisha Slan
`(74) Attorney, Agent, or Firm - Birch, Stewart, Kolasch
`& Birch, LLP
`
`ABSTRACT
`(57)
`A wireless power transmitter including a power supply unit
`configured to supply an input voltage; a power conversion
`unit configured to generate wireless power based on a
`driving signal, generated by the supplied input voltage and
`a first pulse width modulation (PWM) signal, and transfer
`the wireless power to a wireless power receiver; and a power
`transmission control unit configured to receive a voltage
`value of a battery charged with the wireless power through
`a wireless network, and generate the first PWM signal based
`on the voltage value of the battery.
`
`18 Claims, 24 Drawing Sheets
`
`298
`!
`
`299
`
`~
`
`Ex.1006
`APPLE INC. / Page 1 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 1 of 24
`
`US 9,461,479 B2
`
`FIG. 1
`
`100
`!
`__ V!TRELESS POWER
`WIRELESS POWER (\ f\
`1
`I V \.;
`TRANSMI'fl'ER
`RECEIVER
`
`200
`
`FIG. 2A
`
`i
`
`100"
`
`190
`
`110
`' ________________________ L ____________________ l
`:
`111
`:
`i
`i
`l
`i
`
`I
`
`112
`
`b~:R coNvrnsmN ~l\r
`
`POWER SUPPLY
`UNIT
`
`POWER TRANSMISSION
`1---,.....-1 CONTROL UNIT
`
`e-------
`
`113
`\
`
`:MODULATION/
`DEMODULA'I'ION UNI'I'
`i
`i
`i _____________________________________________ J
`
`FIG. 2B
`
`290
`\
`r---------------------------~---------------------------7
`
`291
`
`POWER RECEIVING
`UNIT
`
`298
`
`299
`
`CHARGING UNIT
`
`BATTERY
`
`293
`\
`
`MODULATION/
`DEMODULATION UNIT
`
`292
`
`POWER fmCEI\i1NG
`CONTROL UNIT
`
`Ex.1006
`APPLE INC. / Page 2 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 2 of 24
`
`US 9,461,479 B2
`
`FIG. 3
`
`100" ,-----..f#----------.1111a l
`
`2911a
`
`Ex.1006
`APPLE INC. / Page 3 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 3 of 24
`
`US 9,461,479 B2
`
`FIG. 4A
`
`111
`r _____________________ l _______________________ 1
`1115
`c-----1 -_ --- '
`:POWER SENSING:
`:mm
`:
`L------ ------ '
`
`1112
`
`11pa
`
`100 "'
`
`112
`
`POWER 'l'RAJfSMJSSION
`!'QN'I'ROL UN• IT
`
`v
`
`-
`
`190
`,-------- ---- l --7
`: POWER SUPPLY umr :
`L------------------~
`
`i
`
`1 - -~ - , •
`
`TRANSMJTTING
`i INVERTER 1 - - - - 1 - - - - - 1 COIL
`1114
`
`i-·---·-------·--
`
`----·- '------~
`
`'' I
`/1,
`I V
`!
`i
`I
`: POSITIONING
`: UNIT
`:
`!
`L _____________ J
`I
`L _______________________________________________ J
`
`[\ \f
`
`---
`
`113
`\
`
`MODULATION/
`DEMODULATION UNI'l'
`
`F1Cl. 4B
`
`200 "'
`
`I
`I
`
`291
`(
`r----------------------: ------------------------7
`
`I
`I
`
`i
`I
`2911a
`2914
`2913
`I
`I
`I
`:
`I
`I
`A A J.....E°i RECEIVING ______ RECTI_FIER ______ POWER SENSING
`. - -~ - - , . . - - -~ - - - . I
`I
`:
`i V Vi e..i COIL
`:
`CIRCUIT
`UNIT
`L-------------------------------------- --------~
`
`,
`
`I
`
`298
`;
`r------- i -------,
`I CHARGING UNIT
`I
`L _________________ J
`
`I
`
`293
`\
`
`292
`
`MODULATION/
`DEMODULA'I10.N UNIT
`
`POWER HECEIVING
`CONTROL UNIT
`
`Ex.1006
`APPLE INC. / Page 4 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 4 of 24
`
`US 9,461,479 B2
`
`FIG. 5
`
`r----------------------
`
`100 "'
`
`112
`
`POW@
`TRANSMISSION 1 - - - - . - - - -<
`CONTROL UNIT
`
`113
`I
`
`MODULATION/
`DEMODULATION UNIT
`
`1115
`, ........... .,J .. ., ........... ,
`POWER
`I
`I
`i SENSING UNIT i
`L----- ______ .;
`1112
`I
`
`INVERTER,___. __ _, MUX
`
`1114
`I
`__ J ___ -------
`; POSITIONING
`;
`: .......... UNIT ............ :
`
`FIG. 6
`
`111
`j ------------------------7
`i
`1113
`1111a-1
`' ' !
`'
`
`!
`
`TRANSMITTING
`COIL
`
`+--
`' !
`'
`
`1111a-2
`\
`TRANSMITTING
`COIL
`
`1111a-n
`\
`TRANSMITTING
`COIL
`
`200
`I
`
`Ex.1006
`APPLE INC. / Page 5 of 47
`
`

`

`FIG. 7 A
`
`111
`{
`i-·-· ·- -· ·-· --·-· ·-·--·-· --·-· ·-· -· ·-1115--·-· --·-··-· --·-· --·-··-· --·-· --·-··-· J_ ·-· -- ·-· ·-· --·-· -- ·-· ·-· --·-· -- ·-· ·-· --·-· ·- ·-· ·- -- -· ·- -· ·- -- -· ·- -,
`
`-~--!
`
`1112
`INVERTER I
`
`\
`POWER SENSING
`UNIT
`
`I
`
`1117
`
`1116
`I GENERATION
`
`RESONANT
`CIRCUIT
`
`1i11b
`
`TRANSMI'ITING
`,_C.;..;.OI;;;;..L _ _ -1
`
`I
`
`100 "
`
`112
`
`POWER TRANSMISSION
`CONTROL UNIT
`
`190
`
`POWER SUPPLY UNIT
`
`fj\r-
`________________________________________________________ j
`
`,
`L____
`
`FREQUENCY
`ADJUSTIIEN'I'
`
`113
`I
`
`MODULATION/
`DEMODULATION UNIT
`
`e •
`
`00
`•
`~
`~
`~
`
`~ = ~
`
`0
`(') ...
`~ ...
`0 ....
`
`N
`
`O'I
`
`('D
`('D
`
`rJJ =(cid:173)
`.....
`Ul
`0 ....
`N ...
`
`d r.,;_
`
`\0
`~
`0--,
`"'""' ~
`-....l
`\0 = N
`
`Ex.1006
`APPLE INC. / Page 6 of 47
`
`

`

`FIG. 7B
`
`200
`
`"
`r-------------------
`
`_____ _)___________
`2917
`291
`l
`----------
`I
`
`--------------,
`
`2911b
`\
`RECEIVING
`COIL
`
`2912
`\
`RESONANT
`GENERATION
`CIRCUIT
`
`YREQUENCY
`ADJUSTMENT UNIT
`I
`
`2914
`
`2913
`\
`RECTIFIER
`cmcmr
`
`Mf ~ __ -------------------------------------- •--------------
`
`POWER
`SENSING UNIT
`
`293
`\
`
`MODULATION/
`DEMODULATION UNIT
`
`e •
`
`00
`•
`~
`~
`~
`
`~ = ~
`
`0
`(') ...
`~ ...
`0 ....
`
`N
`
`O'I
`
`298
`I
`--·--·-·--·-··-·--.J
`··•-«--•-·--·-··-·1
`CH.ARGJNG UNIT
`!
`-------~--------'
`
`[
`
`292
`
`POWER RECEIVING
`CONTROL UNIT
`
`('D
`('D
`
`rJJ =(cid:173)
`.....
`O'I
`0 ....
`N ...
`
`d r.,;_
`
`\0
`~
`0--,
`"'""' ~
`-....l
`\0 = N
`
`Ex.1006
`APPLE INC. / Page 7 of 47
`
`

`

`FIG. 8
`
`r ____________________________ L _____________________ _
`111
`
`---------7
`
`1115
`\
`- - - '
`POWER
`SENSING UNIT
`
`1112
`\
`INVERTER
`
`1113
`
`I
`
`MUX
`
`100 "'
`
`112
`l
`
`POWER
`TRANSMISSION
`CONTROL UNIT
`
`113
`\
`MODULATION/
`DEMODULATION
`UNl'l'
`
`l
`
`1116~1
`!
`RESONANT
`GENERATION
`CIRCUIT
`1116-2
`
`GENERATION
`CIRCUIT
`•
`•
`•
`1116-n
`
`1111b-1
`l
`'l'HANSMI'l'TING
`COIL
`
`1111h-2
`
`COIL
`
`N\r
`
`I
`I
`I
`I
`I
`I
`I
`I
`I
`
`l0J\r
`
`RESONANT I TRANSMITTING
`
`1117
`\
`FREQUENCY
`RESONANT
`ADJUSTMENT
`GENERATION-----~ f\ f\ _
`CIRCUIT ~ / i V v-
`UNIT
`_____________________________________________________________ j
`
`3
`
`9
`
`3
`
`1111b~n
`
`e •
`
`00
`•
`~
`~
`~
`
`~ = ~
`
`0
`(') ...
`~ ...
`0 ....
`
`N
`
`O'I
`
`('D
`('D
`
`rJJ =(cid:173)
`.....
`-....J
`0 ....
`N ...
`
`d r.,;_
`
`\0
`~
`0--,
`"'""' ~
`-....l
`\0 = N
`
`Ex.1006
`APPLE INC. / Page 8 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 8 of 24
`
`US 9,461,479 B2
`
`FIG. 9
`
`100
`r ____________________________ l ____________________________ .
`i
`140
`i
`l
`i--OUTP~-UNIT--!
`I
`!
`Ml
`
`mo
`I
`
`110
`
`POWER TRANSMISSION
`UNI'l'
`
`i
`
`DISPLAY UNIT
`142
`
`AUDIO OUTPUT
`UNI'I'
`
`150
`)
`MEMORY
`190
`)
`
`120
`I
`SENSOR UNIT
`
`CONTROLLER
`
`130
`
`l
`
`COMM1JNICATION
`POWER SUPPLY
`UNIT
`UNIT
`'
`L--------------------------------------------------------- •
`
`Ex.1006
`APPLE INC. / Page 9 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 9 of 24
`
`US 9,461,479 B2
`
`FIG. 10
`
`280
`I
`
`200
`
`/
`
`250
`I
`. ----------...l.-------7
`OUTPUT mm
`:
`I
`I I DJSPLAY UNIT ~-+····251
`
`'~ - - -~ I
`
`AlJDJO OUTPUT
`MODULE
`
`I
`I
`
`:···-252
`i
`
`I
`
`I
`
`I ALARM UNIT 1+253
`I HAP'l'IC MODULE 1··+254
`
`I
`' __________________ ...J
`I
`'
`
`CONTROLLER
`
`MEMORY
`
`260
`
`MULTrMEDIA
`MODULE
`
`- 281
`
`290
`I
`,----------1 __________ 7
`POWER SUPPLY UNl'l'
`POWER lmCEJVING
`UNIT
`
`291
`
`POWER RECEIVING
`CONTROL UNIT
`
`MODID..ATION/
`DEMODULATION UNIT
`
`I CHARGING UNIT
`
`·-292
`
`r-·293
`
`I
`
`l·+-296
`
`I
`
`H-299
`BATnmY
`L _____________________ J
`I
`
`IN'I'ERF ACE UNIT
`
`··- 270
`
`L
`
`I
`I
`
`I
`
`210
`c-------------l-------------~
`WIRELESS COMMUNICATION UNIT
`211 .- I BROADCASTING RECEIVING
`I MODUI:E
`212 .-1 MOBILE COMMUNICATION
`MODULE
`WIRELESS INTERNET
`MODULE
`SHORT·· RANG!(
`COMMUNICATION MODULE
`
`213
`
`214
`
`215 ·-
`
`POSITlON-LOCATION
`MODULE
`:
`L---------------------------~
`220
`r _____________ l _____________ ,
`:
`A/V INPU'f UNIT
`:
`221 -H
`I
`CAMERA
`222 -+··i
`
`I
`
`MICROPHONE
`I
`I
`L---------------------------~
`
`USER INPUT UNTI'
`240
`,····--·-··--··················· L .... __ ····················-··,
`I I
`SENSING UNlT
`241 --H
`PROXJMITY SENSOR
`242 ·-H
`243 ---H
`
`230
`
`I
`
`I
`
`I
`
`PRESSURE SENSOR
`
`MOTWN SENSOR
`L ___________________________ ~
`
`Ex.1006
`APPLE INC. / Page 10 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 10 of 24
`
`US 9,461,479 B2
`
`FIG. 11A
`
`100 " 112
`
`\
`POWER TRANSMISSION
`CONTROL UNIT
`
`200
`
`I
`
`292
`
`S - - - - - - -1
`
`113
`\
`
`MODULATION/
`DEMODULATION UNl'l'
`
`1------;POWER RECEIVING
`CONTROL UNIT
`
`293
`
`MODULATION/
`DEMODULATION UNIT
`
`FIG. 11B
`
`10d
`
`"
`n .... n .... n. ______ n ___ n
`
`10c
`
`"'
`
`_..----.,_
`___ _/
`'I._ __ .../
`
`,--~
`
`'\_ ___ _
`
`Ex.1006
`APPLE INC. / Page 11 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 11 of 24
`
`US 9,461,479 B2
`
`FIG. 12A
`
`CLK
`
`ENCODED
`BIT
`
`i 1
`
`I
`
`I
`I
`
`BYTE
`FORMAT
`
`I
`
`I
`
`!START: bO
`
`I
`
`I
`
`0 : 1 i
`
`I
`
`I
`
`I
`
`I
`
`0 i 1
`
`I
`
`I
`I
`
`1
`
`I
`
`I
`I
`
`i O i O i
`
`I
`
`I
`I
`
`I
`
`I
`I
`
`FIG. 12B
`
`bl
`
`I
`
`: b2
`
`I
`
`b3 ! b4
`
`I
`
`I
`
`I
`
`I
`
`I
`
`I
`
`b5 : bB : b7 PARITY: STOP
`
`I
`
`I
`
`I
`
`I
`
`FIG. 13
`
`500 I
`
`510
`I
`I PREAMBLE I
`
`520
`I
`HEADER
`
`530
`I
`MESSAGE
`
`540
`I
`I CHECKSUM I
`
`I .
`
`COMMAND~PACKET
`
`I I
`
`Ex.1006
`APPLE INC. / Page 12 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 12 of 24
`
`US 9,461,479 B2
`
`FIG. 14
`
`610 -
`
`SELECTION PHASE
`
`620 ··
`
`PING PHASE
`
`630
`
`IDENTIFrCATION A.ND
`CONFIGURATION PHASE
`
`640
`
`POWER TRANSF'ER PHASE
`
`FIG. 15
`
`5100 I
`
`b7 b6 b5 b4 b3 b2
`
`b1
`
`bO
`
`HEADER(5120)
`
`SIGNAL S'l'RENG'l'H VALUE(5130)
`
`BO
`
`B1
`
`Ex.1006
`APPLE INC. / Page 13 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 13 of 24
`
`US 9,461,479 B2
`
`FIG. 16A
`
`b7
`
`I b6 I b5
`
`I b4 I b3
`HEADER(5220)
`
`I b2
`
`I bl I bO
`
`5200
`
`/
`
`MAJOR VERSION (5231)
`
`I MINOR VERSION (5232)
`
`MANUFACTURER CODE(5233)
`
`BO
`
`Bl
`
`B2
`
`-
`
`B3
`B4 (g,g4) I
`.. ..
`
`-
`
`"
`
`B7
`
`BASIC DEVICE IDENTI!i'JER(5235)
`
`5230
`
`FIG. 16B
`
`b5
`bO
`b1
`b2
`b3
`b4
`b6
`b7
`. . . - - - - -+ - -~~~~~~ . . . _ _ _ _ _ _ _ _ _ . /
`BO
`HEADER(5320)
`
`53oo
`
`B1
`
`.. .. ..
`
`BB
`
`EXTENDED DEVICE IDENTIFIER(5330)
`
`Ex.1006
`APPLE INC. / Page 14 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 14 of 24
`
`US 9,461,479 B2
`
`FIG. 17
`
`5431--
`
`~-
`
`BO
`·-
`POWERI
`B1 CLASS
`B2
`B3 PROP I
`(5433)
`
`b7 I b6 I b5 I b4 I b3
`HEAflER(5420)
`
`I b2 I bl I bO
`
`5400
`
`/
`
`, ____
`
`MAXIMUM POWER(5432)
`
`RESERVED
`
`RESERVED
`
`I COUNT{5434)
`
`5430
`
`RESERVED
`
`,_
`
`FIG. 18
`
`B4
`
`>---
`
`B5
`
`BO
`
`B1
`
`b7
`
`I b6 I b5
`
`I b4 I b3
`HEAflER(5520)
`
`I b2 I bl I bO
`
`CONTROL KRROR VALm:(55:3O)
`
`5500
`
`/
`
`Ex.1006
`APPLE INC. / Page 15 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 15 of 24
`
`US 9,461,479 B2
`
`FIG. 19
`
`5600
`
`/
`
`b7 b6 b5 b4 b3
`
`b2
`
`bl
`
`bO
`
`HEADER (5620)
`
`END POWER TRANSFER CODE (5630)
`
`BO
`
`B1
`
`FIG. 20
`
`100'
`I
`r ____________________ J ___________________ 7
`C110
`I
`r ____ _L._. _ _ _ _ l
`
`C120
`!
`r--------- L --7
`
`I
`I
`I
`
`C100
`
`/
`
`l
`
`_________________ l __________ ~
`1
`I
`I
`
`I
`I
`I
`
`I
`I
`I
`
`I
`
`Q2-+
`
`I
`I
`
`I
`I
`
`I
`I
`
`+
`
`Vo
`
`Cl
`
`•.•..••••.•.••.•.••.• L __________ _J •. L ______________ J .•.••.•.••.• J L ____________________________ _
`
`'----+-~ : n:1
`i
`i-----ri-- ,·
`~-----H--
`,-----r1--
`I
`I
`11
`11
`I
`I
`I
`11 ~ - -
`1
`11
`11
`I
`I
`11
`11
`I
`11
`I
`11
`I
`
`Ex.1006
`APPLE INC. / Page 16 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 16 of 24
`
`US 9,461,479 B2
`
`FIG. 21
`
`fo
`
`2.0
`
`1.8
`
`1.6
`
`1.4
`
`1.2
`
`LO
`
`0.8
`
`l'":i
`·;;;
`a
`
`0.5 ..... _.._...._.__ _ _._ _____ __,_ ___ ~ __ ....._ __ _._ _____ __. __ __.
`00
`00 ~ 00 ~ ~ ~
`~ ~ 00 W
`freq(kHz)
`
`Ex.1006
`APPLE INC. / Page 17 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 17 of 24
`
`US 9,461,479 B2
`
`+
`Ro
`~ v.
`
`FIG. 22
`
`+
`
`Vm
`
`- 1
`
`.¥
`-.IJI1Vo
`Vm--u-
`
`F
`Vm'-,,
`
`-%-].
`
`,✓
`
`FIG.
`
`23
`
`1f5 J
`
`1mj1
`
`,--,._A~A,~-~hA,,-.,--, - - - - - - - - - - -
`-------·--·--------·--·----·
`
`11,p
`-- + VP --- __ .,,.
`
`-Jr,.
`Vs --- --
`
`1in ----
`Ml Ji
`iw i
`illl! !
`·
`
`Vd
`
`Vm
`
`Ex.1006
`APPLE INC. / Page 18 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 18 of 24
`
`US 9,461,479 B2
`
`FIG. 24
`
`112a
`,----------------------------------1 ---------------------------------7
`112-2
`112-1
`112-4
`112-3
`I
`\
`I
`\
`INPUT CURRENT
`i\1RELESS
`POWER
`PW SIGNAL
`REPERENCE VALUE
`RECEPTION
`GENERAT'OR
`CONTROLLER
`GENERATOR
`MODULE
`
`VtJ&u
`
`M1,M2,M3,M4
`
`ib_111i
`______________________________________________________________________ J
`
`FIG. 25
`
`112b
`I
`,----------------------------------J----------------------------------7
`212~1
`212-3
`212-2
`I
`Po=R
`· ,rn
`PW SIGNAL
`GENERATOR
`CONTROLLER
`
`M5,M6,M'7,M8
`
`.
`-· 1t10.tt..re!
`
`WIRELESS
`'l'HAi\JSMISSION
`MODULE
`
`ioott
`Vbatt
`_____________________________________________________________________ J
`
`Ex.1006
`APPLE INC. / Page 19 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 19 of 24
`
`US 9,461,479 B2
`
`FIG. 26
`
`START
`
`S11 -
`
`S12
`
`RECEIVE BATTERY VOLTAGE INFORMATION
`
`GENERATE [NPUT CURRENT REFERENCE VALUE BASED ON
`BATTERY VOLTAGE INl1'0RMA'I'ION1 HEF'ERENCE CURRENT VALUE
`FOR BATTERY CHARGING AND INPUT VOLTAGE
`
`GENERATE BATTERY CHARGING CURRENT VALUE COMPENSATING
`S13 ·-·-- FOR DIFFERENCE BETWEEN INPUT CURRENT REFERENCE VALUE
`AND CURRENTLY - MEASURED INPUT CURRENT VALUE
`
`S14-
`
`GENERATE PWM SIGNAL BASED ON BAT'!'ERY CHARGING CURRENT
`VALUE
`
`S15-
`
`OUTPUT PifM SJGNAL TO PRIMARY-SIDE INVERTER
`
`END
`
`FIG. 27
`
`( START)
`i
`GENERATE BATIERY DISCHARGING CURRENT VALUE COMPENSATING
`S21- FOR DIFFERENCE BETWEEN REFERENCE CURRENT VALUE OF BATTERY
`AND CURREN'l'LY-MEASURED CURRENT VALUE OF BATTERY
`
`822-
`
`GENERATE PWM SIGNAL BASED ON BATTERY DISCHARGING CURRENT
`VALUE
`
`S23~.._ __ 0_UTP_UT_P_WM_SI_GN_AL_T_0_S-.EC_0N_D_AR_Y_··S_ID_E _IN_VE_R'.'.'_, ER __ __,
`
`i
`C END)
`
`Ex.1006
`APPLE INC. / Page 20 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 20 of 24
`
`US 9,461,479 B2
`
`FIG. 28
`
`I !
`
`r--7
`
`M3
`
`M3
`
`i2
`
`M2
`
`Ml
`
`M2
`
`M3
`
`i1.rp
`
`hatt
`
`I
`I
`I
`
`I~,\~
`MODE 1 \ MODE 3 MODE 4
`MODE 2
`
`M5,M6,1f7,MB: OFF
`
`Ex.1006
`APPLE INC. / Page 21 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 21 of 24
`
`US 9,461,479 B2
`
`FIG. 29
`
`DTsr
`I I
`
`DTsr
`I I
`
`M'7
`
`M:7
`
`M7
`
`MS
`
`MB
`
`ihatt
`
`..
`
`..
`
`I
`I
`I
`I
`
`M1,M2,M3,M4. OFF
`
`Ex.1006
`APPLE INC. / Page 22 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 22 of 24
`
`US 9,461,479 B2
`
`FIG. 30
`
`Cr
`
`Lr
`
`Lr
`
`Cr
`
`Ex.1006
`APPLE INC. / Page 23 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 23 of 24
`
`US 9,461,479 B2
`
`FIG. 31i\
`
`Ml j
`iYJ !
`v.
`i~i
`
`Vm
`
`M5
`
`ill5 i
`-- . ____ . ____ ._ - - -
`imi - - - -
`
`.
`
`V1mu.
`
`M7
`
`FIG. 31B
`
`Ex.1006
`APPLE INC. / Page 24 of 47
`
`

`

`U.S. Patent
`
`Oct. 4, 2016
`
`Sheet 24 of 24
`
`US 9,461,479 B2
`
`FIG. 31C
`
`M4j
`
`ha ----
`Ml j
`im !
`bra f Cr ---i1.rp
`
`Vm
`
`Lm
`
`Lr
`Vd ~
`
`113 J1
`
`FIG. 31D
`
`Ex.1006
`APPLE INC. / Page 25 of 47
`
`

`

`US 9,461,479 B2
`
`1
`WIRELESS POWER TRANSMITTER AND
`WIRELESS POWER TRANSFER METHOD
`THEREOF
`
`CROSS-REFERENCE TO A RELATED
`APPLICATION
`
`This application claims the benefit of priority of Korean
`Patent Application No. 10-2013-0059894, filed on May 27,
`2013, which is herein expressly incorporated by reference in 10
`their entireties.
`
`BACKGROUND OF THE INVENTION
`
`2
`current value for charging the battery and the input voltage,
`a first current controller that compares the input current
`reference value with a currently-measured input current
`value and decide the battery charging current value for
`5 compensating for a difference according to the comparison
`result, and a first PWM signal generator that generates the
`first PWM signal corresponding to the battery charging
`current value and apply the first PWM signal as the driving
`signal to the power conversion unit.
`In accordance with one embodiment disclosed herein, the
`power transmission control unit may further include a wire(cid:173)
`less transmission module that transmits the voltage value of
`the battery to the wireless reception module, a second
`current generator that compares the reference current value
`15 of the battery with a currently-measured current value of the
`battery and decide a battery discharging current value for
`compensating for a difference according to the comparison
`result, and a second PWM signal generator that generates a
`second PWM signal corresponding to the battery discharg-
`20 ing current value and applies the second PWM signal as the
`driving signal to the power conversion unit of the wireless
`power receiver.
`In accordance with one embodiment disclosed herein, the
`power transmission control unit can generate the second
`PWM signal in a battery discharging mode.
`In accordance with one embodiment disclosed herein,
`there is provided a wireless power transfer method including
`receiving a voltage value of a battery of a wireless power
`receiver through a wireless network, generating a first pulse
`30 width modulation (PWM) signal based on the voltage value
`of the battery, generating power in a wireless manner based
`on a driving signal by an input voltage and the first PWM
`signal, and transferring the wireless power to the wireless
`power receiver.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`1. Field of the Invention
`The present invention relates to a wireless power trans(cid:173)
`mitter, and a wireless power transfer method thereof.
`2. Description of the Related Art
`In recent years, the method of contactlessly supplying
`electrical energy to electronic devices in a wireless manner
`has been used instead of the traditional method of supplying
`electrical energy in a wired manner. The electronic device
`receiving energy in a wireless manner may be directly driven
`by the received wireless power, or a battery may be charged
`by using the received wireless power, then allowing the 25
`electronic device to be driven by the charged power.
`
`SUMMARY OF THE INVENTION
`
`In accordance with the embodiments disclosed herein,
`there is provided a wireless power transmitter including a
`power supply unit that supplies an input voltage, a power
`conversion unit that generates power in a wireless manner
`based on a driving signal, which is generated by the supplied
`input voltage and a first pulse width modulation (first PWM) 35
`signal, and transfers the power to a wireless power receiver
`in the wireless manner, and a power transmission control
`unit that applies the driving signal to the power conversion
`unit. Here, the power transmission control unit can receive
`a voltage value of a battery, charged with the wireless power, 40
`through a wireless network, and generate the first PWM
`signal based on the voltage value of the battery.
`In accordance with one embodiment disclosed herein, the
`power transmission control unit can generate an input cur(cid:173)
`rent reference value based on the voltage value of the 45
`battery, a reference current value for charging the battery,
`and the input voltage value, generate a battery charging
`current value for compensating for a difference between the
`input current reference value and an input current value, and
`generate the first PWM signal based on the battery charging 50
`current value.
`In accordance with one embodiment disclosed herein, the
`power transmission control unit can generate the first PWM
`signal in a battery charging mode.
`In accordance with one embodiment disclosed herein, the 55
`power transmission control unit may calculate the input
`current reference value by multiplying the voltage value of
`the battery and the reference current value for charging the
`battery, and dividing the multiplied value by the input
`voltage value.
`In accordance with one embodiment disclosed herein, the
`power transmission control unit may include a wireless
`reception module that receives the voltage value of the
`battery, charged with the wireless power, in real time
`through a wireless network, an input current reference value 65
`generator that generates the input current reference value
`based on the voltage value of the battery, the reference
`
`The accompanying drawings, which are included to pro(cid:173)
`vide a further understanding of the invention and are incor(cid:173)
`porated in and constitute a part of this specification, illustrate
`embodiments of the invention and together with the descrip-
`tion serve to explain the principles of the invention.
`In the drawings:
`FIG. 1 is an overview illustrating a wireless power
`transmitter and an electronic device according to the
`embodiments of the present invention;
`FIGS. 2A and 2B are block diagrams illustrating the
`configuration of a wireless power transmitter and an elec(cid:173)
`tronic device that can be employed in the embodiments
`disclosed herein, respectively;
`FIG. 3 is a view illustrating a concept in which power is
`transferred from a wireless power transmitter to an elec(cid:173)
`tronic device in a wireless manner according to an inductive
`coupling method;
`FIGS. 4A and 4B are block diagrams illustrating part of
`a wireless power transmitter and an electronic device in a
`magnetic induction method that can be employed in the
`embodiments disclosed herein;
`FIG. 5 is a block diagram illustrating a wireless power
`60 transmitter configured to have one or more transmission
`coils receiving power according to an inductive coupling
`method that can be employed in the embodiments disclosed
`herein;
`FIG. 6 is a view illustrating a concept in which power is
`transferred to an electronic device from a wireless power
`transmitter in a wireless manner according to a resonance
`coupling method;
`
`Ex.1006
`APPLE INC. / Page 26 of 47
`
`

`

`US 9,461,479 B2
`
`20
`
`3
`FIGS. 7A and 7B are block diagrams illustrating part of
`a wireless power transmitter and an electronic device in a
`resonance method that can be employed in the embodiments
`disclosed herein;
`FIG. 8 is a block diagram illustrating a wireless power 5
`transmitter configured to have one or more transmission
`coils receiving power according to a resonance coupling
`method that can be employed in the embodiments disclosed
`herein;
`FIG. 9 is a block diagram illustrating a wireless power 10
`transmitter further including an additional element in addi(cid:173)
`tion to the configuration illustrated in FIG. 2A;
`FIG. 10 is view illustrating a configuration when an
`electronic device according to the embodiments disclosed
`herein is implemented in the form of a mobile terminal;
`FIGS. llA and 11B are views illustrating the concept of
`transmitting and receiving a packet between a wireless
`power transmitter and an electronic device through the
`modulation and demodulation of a wireless power signal in
`transferring power in a wireless marmer disclosed herein;
`FIGS. 12A and 12B are views illustrating a method of
`showing data bits and byte constituting a power control
`message provided by the wireless power transmitter 100;
`FIG. 13 is a view illustrating a packet including a power
`control message used in a contactless (wireless) power 25
`transfer method according to the embodiments disclosed
`herein;
`FIG. 14 is a view illustrating the operation phases of a
`wireless power transmitter and an electronic device accord(cid:173)
`ing to the embodiments disclosed herein;
`FIGS. 15 to 19 are views illustrating the structure of
`packets including a power control message between a wire(cid:173)
`less power transmitter and an electronic device;
`FIG. 20 is a view illustrating a structure of an LLC
`resonant converter;
`FIG. 21 is a view illustrating the change in transfer gain
`according to a transmission frequency in the LCC resonant
`converter;
`FIG. 22 is a view illustrating first harmonic approxima(cid:173)
`tion (FHA) of the LLC resonant converter;
`FIG. 23 is a view illustrating a structure of a bidirectional
`resonant converter in accordance with an embodiment dis(cid:173)
`closed herein;
`FIGS. 24 and 25 are configuration views of a power
`transmission control unit that controls a bidirectional reso(cid:173)
`nant converter in accordance with an embodiment disclosed
`herein;
`FIG. 26 is a flowchart illustrating a wireless power
`transfer method in a charging mode in accordance with an
`embodiment disclosed herein;
`FIG. 27 is a flowchart illustrating a wireless power
`transfer method in a discharging mode in accordance with an
`embodiment disclosed herein;
`FIGS. 28 and 29 are views illustrating operation wave(cid:173)
`lengths during charging and discharging;
`FIG. 30 is a view illustrating an equivalent circuit of a
`bidirectional resonant converter in accordance with an
`embodiment disclosed herein; and
`FIGS. 31A to 31D are views illustrating an operation
`mode of the bidirectional resonant converter in accordance 60
`an embodiment disclosed herein.
`
`4
`the technologies disclosed herein are not limited to this, and
`may be also applicable to all kinds of power transmission
`systems and methods, wireless charging circuits and meth-
`ods to which the technological spirit of the technology can
`be applicable, in addition to the methods and apparatuses
`using power transmitted in a wireless manner.
`In addition, a suffix "module" or "unit" used for constitu(cid:173)
`ent elements disclosed in the following description is merely
`intended for easy description of the specification, and the
`suffix itself does not give any special meaning or function.
`Furthermore, the terms including an ordinal number such
`as first, second, etc. can be used to describe various ele(cid:173)
`ments, but the elements should not be limited by those terms.
`15 The terms are used merely for the purpose to distinguish an
`element from the other element. For example, a first element
`may be named to a second element, and similarly, a second
`element may be named to a first element without departing
`from the scope of right of the invention.
`Hereinafter, preferred embodiments of the present inven(cid:173)
`tion will be described in detail with reference to the accom(cid:173)
`panying drawings, and the same or similar elements are
`designated with the same numeral references regardless of
`the numerals in the drawings and their redundant description
`will be omitted.
`FIG. 1 is a view conceptually illustrating a wireless power
`transmitter 100 and an electronic device 200 according to
`the embodiments of the present invention. Referring to FIG.
`1, the wireless power transmitter 100 may be a power
`30 transfer apparatus configured to transfer power required for
`the electronic device 200 in a wireless marmer.
`Furthermore, the wireless power transmitter 100 may be
`a wireless charging apparatus configured to charge a battery
`of the electronic device 200 by transferring power in a
`35 wireless manner. When the wireless power transmitter 100 is
`a wireless charging apparatus will be described later with
`reference to FIG. 9.
`Additionally, the wireless power transmitter 100 may be
`implemented with various forms of apparatuses transferring
`40 power to the electronic device 200 requiring power in a
`contactless state. Further, the electronic device 200 is a
`device that is operable by receiving power from the wireless
`power transmitter 100 in a wireless marmer. Furthermore,
`the electronic device 200 may charge a battery using the
`45 received wireless power.
`Further, an electronic device for receiving power in a
`wireless manner as described herein includes a portable
`phone, a cellular phone, a smart phone, a personal digital
`assistant (PDA), a portable multimedia player (PMP), a
`50 tablet, a multimedia device, or the like, in addition to an
`input/output device such as a keyboard, a mouse, an audio(cid:173)
`visual auxiliary device, and the like.
`The electronic device 200, as described later, may be a
`mobile communication terminal, (for example, a portable
`55 phone, a cellular phone, and a tablet or multimedia device).
`When the electronic device is a mobile terminal, it will be
`described later with reference to FIG. 10.
`Further, the wireless power transmitter 100 may transfer
`power in a wireless marmer without mutual contact to the
`electronic device 200 using one or more wireless power
`transfer methods. In other words, the wireless power trans-
`mitter 100 may transfer power using at least one of an
`inductive coupling method based on magnetic induction
`phenomenon by the wireless power signal and a magnetic
`65 resonance coupling method based on electromagnetic reso(cid:173)
`nance phenomenon by a wireless power signal at a specific
`frequency.
`
`DETAILED DESCRIPTION OF THE
`INVENTION
`
`The technologies disclosed herein are applicable to wire(cid:173)
`less power transfer (contactless power transfer). However,
`
`Ex.1006
`APPLE INC. / Page 27 of 47
`
`

`

`US 9,461,479 B2
`
`5
`
`5
`Wireless power transfer in the inductive coupling method
`is a technology transferring power in a wireless manner
`using a primary coil and a secondary coil, and refers to the
`transmission of power by inducing a current from a coil to
`another coil through a changing magnetic field by a mag(cid:173)
`netic induction phenomenon.
`Wireless power transfer in the inductive coupling method
`refers to a technology in which the electronic device 200
`generates resonance by a wireless power signal transmitted
`from the wireless power transmitter 100 to transfer power
`from the wireless power transmitter 100 to the wireless
`power receiver 200 by the resonance phenomenon.
`Hereinafter, the wireless power transmitter 100 and elec(cid:173)
`tronic device 200 according to the embodiments disclosed
`herein will be described in detail. In assigning reference
`numerals to the constituent elements in each of the following
`drawings, the same reference numerals will be used for the
`same constituent elements even though they are shown in a
`different drawing.
`FIGS. 2A and 2B are block diagrams illustrating the
`configuration of a wireless power transmitter 100 and an
`electronic device 200 that can be employed in the embodi(cid:173)
`ments disclosed herein, respectively. Referring to FIG. 2A,
`the wireless power transmitter 100 includes a power trans(cid:173)
`mission unit 110, and the power transmission unit 110
`includes a power conversion unit 111 and a power transmis(cid:173)
`sion control unit 112.
`The power conversion unit 111 transfers power supplied
`from a transmission side power supply unit 190 to the
`electronic device 200 by converting it into a wireless power 30
`signal. The wireless power signal transferred by the power
`conversion unit 111 is generated in the form of a magnetic
`field or electro-magnetic field having an oscillation charac(cid:173)
`teristic. For this purpose, the power conversion unit 111 may
`be configured to include a coil for generating the wireless
`power signal. Further, the power conversion unit 111 may
`include a constituent element for generating a different type
`of wireless power signal according to each power transfer
`method.
`In accordance with embodiments, the power conversion
`unit 111 may include a primary coil for forming a changing
`magnetic field to induce a current to a secondary coil of the
`electronic device 200. Furthermore, the power conversion
`unit 111 may include a coil ( or antenna) for forming a
`magnetic field having a spec