0001
`
`Ossia, Inc.
`Exhibit 1004
`PGR2016-00023
`U.S. Patent No. 9,124,125
`
`

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`
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`US 9,059,599 B2
`Page 2
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`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`2011/0279244 A1*
`2012/0153893 A1*
`2012/0187851 A1*
`2012/0326660 A1*
`
`................ .. 340/10.34
`11/2011 Park et al.
`6/2012 Schatz et al.
`320/108
`
`7/2012 Huggins et al.
`............. .. 315/159
`12/2012 Lu et a1.
`...................... .. 320/108
`
`2013/0088192 A1*
`2013/0169220 A1*
`2013/0257365 A1*
`2013/0278206 A1*
`2014/0159652 A1*
`
`4/2013
`7/2013
`10/2013
`10/2013
`6/2014
`
`Eaton .......................... .. 320/108
`Karner et al.
`320/108
`
`Redding ..................... .. 320/108
`Won et a1.
`................... .. 320/108
`Hall et al.
`................... .. 320/108
`
`* cited by examiner
`
`0002
`
`0002
`
`

`
`
`
`U.S. Patent
`
`Jun. 16,2015
`
`Sheet 1 of8
`
`US 9,059,599 B2
`
`FIG. 1
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`B 1
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`U.S. Patent
`
`Jun. 16,2015
`
`Sheet 2 of8
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`US 9,059,599 B2
`
`FIG. 2
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`
`
`U.S. Patent
`
`Jun. 16, 2015
`
`Sheet 3 of8
`
`US 9,059,599 B2
`
`FIG. 3
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`
`U.S. Patent
`
`Jun. 16,2015
`
`Sheet 4 of8
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`US 9,059,599 B2
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`FIG. 4
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`U.S. Patent
`
`Jun. 16, 2015
`
`Sheet 5 of8
`
`US 9,059,599 B2
`
`FIG. 5
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`U.S. Patent
`
`Jun. 16, 2015
`
`Sheet 6 of8
`
`US 9,059,599 B2
`
`FIG. 6
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`
`U.S. Patent
`
`Jun. 16, 2015
`
`Sheet 7 of8
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`US 9,059,599 B2
`
`FIG. 7
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`
`
`U.S. Patent
`
`Jun. 16, 2015
`
`Sheet 8 of8
`
`US 9,059,599 B2
`
`FIG. 8
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`

`
`
`
`US 9,059,599 B2
`
`1
`METHOD AND SYSTEM FOR MULTI
`WIRELESS CHARGING
`
`CROSS-REFERENCE TO RELATED
`APPLICATIONS
`
`This application claims priority from Korean Patent Appli-
`cation No. 10-2012-0041334, filed in the Korean Intellectual
`Property Office on Apr. 20, 2012, the disclosure of which is
`.
`.
`incorporated herein by reference.
`
`BACKGROUND OF THE INVENTION
`
`1. Field of the Invention
`
`5
`
`10
`
`15
`
`20
`
`Methods and apparatuses consistent with the exemplary
`embodiments relate to a method and system for wireless
`charging, and more specifically to a method for receiving
`energy wirelessly and charging the received energy, and a
`charging system which operates the method efficiently.
`2. Description of the Prior Art
`Wireless charging which is also referred to as contactless
`charging has a principle that one charging base station must
`charge one mobile device. This is because of the low effi-
`ciency of wireless charging and the interruption which may
`occur among a plurality of mobile devices.
`Charging a plurality of mobile devices together is useful
`since it reduces the charging time, thereby providing prompt
`charging service to a plurality of users.
`Therefore, there is need for a method which could increase
`the charging efficiency in the case of charging a plurality of
`mobile devices at the same time, and also a method which
`could prevent unwanted charging of a mobile device. That is,
`there is need for a method which could limit charging an
`unauthorized mobile device or charging a mobile device 35
`which does not need to be charged urgently.
`
`25
`
`30
`
`SUMMARY OF THE INVENTION
`
`An aspect ofthe exemplary embodiments relates to a wire- 40
`less charging method and system which select a portion of
`mobile devices located in a charging region as a group and
`charge it.
`A wireless charging method, according to an exemplary
`embodiment, may include selecting a portion of mobile 45
`devices located in a charging region as a group, and providing
`energy intended to wireles sly charge the mobile devices in the
`group to the mobile devices in the group.
`In addition, the providing may provide magnetic field
`energy to a frequency band including resonant frequencies of 50
`the mobile devices of the group.
`In addition, the selecting may include selecting a portion of
`the mobile devices as a first group, and selecting the other
`portion of the mobile devices as a second group, and the
`providing may provide energy intended to wirelessly charge 55
`the mobile devices in the first group and energy intended to
`wirelessly charge the mobile devices in the second group in a
`time division method.
`
`In addition, the wireless charging method may further
`include granting a charging order of priority to the mobile 60
`devices located in the charging region, and providing energy
`to the mobile devices, according to the granted charging order
`of priority.
`In addition, the charging order of priority may be deter-
`mined considering at least one oftype, state ofbattery charge,
`remaining battery time and distance to the charging base
`station.
`
`65
`
`0011
`
`2
`
`In addition, the wireless charging method may further
`include selecting a portion of the mobile devices located in
`the charging region as energy relays which relay magnetic
`field energy wirelessly.
`In addition, the selecting may select a portion ofthe mobile
`devices as the energy relays, considering locations and states
`of battery charge of the mobile devices.
`Meanwhile, a wireless charging system, according to an
`exemplary embodiment, may include mobile devices, and a
`charging device which selects a portion of mobile devices
`located in a charging region as a group, and provides energy
`intended to wirelessly charge the mobile devices in the group
`to the mobile devices of the group.
`As aforementioned, according to the present disclosure,
`group charging becomes possible, thereby allowing selec-
`tively charging mobile devices that allow charging. In addi-
`tion, since the communication region performs a preparation
`procedure for charging in advance, it is possible to promptly
`and effectively operate the charging procedure.
`Not only that, since it is possible to select an appropriate
`mobile device and operate it as an energy relay, it is unnec-
`essary to install an additional energy relay. Furthermore, it
`becomes possible to operate a plurality of charging base
`stations, thereby enabling more effective wireless charging.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`The above and/or other aspects of the present disclosure
`will be more apparent by describing certain present disclo-
`sure with reference to the accompanying drawings, in which:
`FIG. 1 is a view explaining a concept of a charging region
`and a communication region;
`FIG. 2 is a view explaining operating state changes of a
`mobile device which occur when the mobile device moves;
`FIG. 3 is a view providing additional explanations on a
`charging preparation procedure of a mobile device;
`FIG. 4 is a view explaining a multi charging;
`FIG. 5 is a view explaining a charging method where a time
`division charging method has been added;
`FIGS. 6 and 7 are views explaining a method for selecting
`an energy relay; and
`FIG. 8 is a view illustrating a charging system of a multi
`charging base station environment.
`
`DETAILED DESCRIPTION
`
`Certain exemplary embodiments are described in higher
`detail below with reference to the accompanying drawings.
`In the following description, like drawing reference numer-
`als are used for the like elements, even in different drawings.
`The matters defined in the description, such as detailed con-
`struction and elements, are provided to assist in a comprehen-
`sive understanding of exemplary embodiments. However,
`exemplary embodiments can be practiced without those spe-
`cifically defined matters. Also, well-known functions or con-
`structions are not described in detail since they would obscure
`the application with urmecessary detail.
`1. Operating Charging/Communication Region
`FIG. 1 is a view explaining a concept of a charging region
`and a communication region. FIG. 1 illustrates one charging
`base station 100 and a plurality of mobile devices 210, 220,
`230. In addition, surrounding area ofthe charging base station
`100 is divided into charging region A and communication
`region B.
`Charging region A is a region where energy may be trans-
`mitted wirelessly from the charging base station 100 in a
`magnetic resonance inducement method and be charged with
`
`0011
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`

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`US 9,059,599 B2
`
`3
`the transmitted energy. Communication region B is a region
`where magnetic field communication is possible with the
`charging base station 100.
`Since charging region A is located inside communication
`region B, magnetic field communication with the charging
`base station 100 is obviously possible in charging regionA as
`well.
`
`In a case where the charging base station 100 and the
`plurality of mobile devices 210, 220, 230 are located as illus-
`trated in FIG. 1,
`i) since mobile device-3 (230) is located outside commu-
`nication region B, not only is communicating with the charg-
`ing base station 100 impossible, but it is also impossible to be
`charged with energy transmitted from the charging base sta-
`tion 100,
`ii) since mobile device-2 (220) is located inside communi-
`cation region B, only magnetic field communication is pos-
`sible with the charging base station 100, and
`iii) since mobile device-1 (210) is located inside charging
`region A, not only is it possible to receive energy wirelessly
`from the charging base station 100 in a magnetic resonance
`inducement method and be charged with the received energy,
`but magnetic field communication with the charging base
`station 100 is also possible.
`FIG. 2 is a view explaining operating state changes of
`mobile device-1 (210) which occur when the mobile device
`moves. FIG. 2 illustrates a state where mobile device-1 (210)
`moves from outside of communication region B (CD) to
`inside of communication region B (@), and then to inside of
`charging region A
`Since in a case where mobile device-1 (210) is located
`outside of communication region B,
`it is impossible for
`mobile device-1 (210) to make magnetic field communica-
`tion with the charging base station 100, and thus mobile
`device-1 (210) carmot recognize the existence ofthe charging
`base station 100.
`
`However, when mobile device-1 (210) moves inside of
`communication region B (CD), since it is possible for mobile
`device-1 (210) to make magnetic field communication with
`the charging base station 100, mobile device-1 (210) recog-
`nizes the existence of the charging base station 100.
`When making magnetic field communication with the
`charging base station 100 becomes possible, mobile device-1
`(210) may perform advanced preparation procedure for
`charging. The charging preparation procedure is as follows:
`1) mobile device-1 (210) transmits its ID to the charging base
`station 100, and 2) the charging base station 100 determines
`whether or not to allow charging, based on the transmitted ID.
`More specifically, if the transmitted ID is an ID for which
`charging is allowed, the charging base station 100 allows
`charging mobile device-1 (21 0), whereas ifthe transmitted ID
`is an ID for which charging is not allowed, the charging base
`station 100 does not allow charging mobile device-1 (210).
`Meanwhile, the present disclosure may be embodied in
`such a manner that, in the charging preparation procedure,
`mobile device-1 (210) further transmits information on a state
`of battery charge besides its ID, in which case the charging
`base station 100 would not to allow charging mobile device-1
`(210) in a case where the state of battery charge is good even
`if the ID is one for which charging is allowed.
`Meanwhile, the present disclosure may also be embodied
`in such a manner that, in the charging preparation procedure,
`mobile device-1 (210) transmits information on its device
`type and remaining battery time to the charging base station
`100, and the charging base station 100 determines whether or
`not to charge mobile device-1 (210) based thereon.
`
`5
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`65
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`4
`
`In addition, even when charging is allowed, charging may
`be allowed in various diffident charging levels. For example,
`it is possible to allocate much energy and energy provision
`time to a mobile device ofa premium ID, while allocating less
`energy and energy provision time to a mobile device of a
`general ID.
`Furthermore, it is also possible to allocate energy amount
`and energy provision time based on the type or remaining
`battery time of a mobile device.
`When mobile device-1 (210) for which charging is allowed
`moves inside the charging region A ((9), mobile device-1
`(210) wirelessly receives energy provided from the charging
`base station 100 and charges its battery.
`Meanwhile, even if the mobile device entered inside the
`communication region B, the mobile device may not perform
`a charging preparation procedure. For example, as illustrated
`in FIG. 3, the present disclosure may be embodied in such a
`manner that, in a case where a movement trace is not towards
`a direction ofthe charging regionA (® ), the charging prepa-
`ration procedure is not performed even if the mobile device
`200 recognizes the charging base station 100.
`This is because a mobile device ofwhich a movement trace
`
`is not towards a direction ofthe charging regionA need not be
`regarded as a mobile device which has intentions to be
`charged (that is, as a mobile device which approaches the
`charging base station 100 to be charged), thereby preventing
`an urmecessary charging preparation procedure in the corre-
`sponding mobile device.
`Meanwhile, in order to prevent an urmecessary charging
`preparation procedure,
`it is also possible to embody the
`present disclosure in such a manner that a mobile device
`performs a charging preparation procedure after a certain
`time has passed even when the mobile device entered inside
`communication region B. Herein, it is possible to embody the
`certain time to be set adaptively according to the type and
`state of battery charge.
`2. Multi Charging Method
`A multi charging method refers to charging a plurality of
`mobile devices located in a charging region altogether. Not
`only charging a plurality ofmobile devices located in a charg-
`ing region (hereinafter referred to as ‘all charging’) but also
`charging only a portion ofthe mobile devices in groups (here-
`inafter referred to as ‘group charging’) is included in the
`range of the multi charging method.
`For multi charging, the charging base station 100 adjusts a
`frequency band of a magnetic field. In a case of an all charg-
`ing, the charging base station 100 provides magnetic field
`energy to a frequency band which includes resonant frequen-
`cies of all mobile devices for which charging is allowed.
`In a case of a group charging, the charging base station 100
`provides magnetic field energy to a frequency band which
`includes resonant frequencies of mobile devices that belong
`to that group.
`FIG. 4 is based on an assumption that 4 mobile devices 210,
`220, 230, 240 are located inside charging region A, and their
`resonant frequencies are fl, f2, f3, and f4, respectively.
`Herein, in a case of charging all the mobile devices, the
`charging base station 100 provides magnetic field energy to
`frequency band B l_4 which includes all the fl, f2, f3, and fl.
`Meanwhile, in a case of group charging only mobile devices-
`1, 2, 3 (210, 220, 230), the charging base station 100 provides
`magnetic field energy to frequency band B l_3 which includes
`only fl, f2, and f3.
`Meanwhile, in order to increase the charging efiiciency, a
`time division method may be further applied to the multi
`charging method. That is, as illustrated in FIG. 5, it is possible
`to provide magnetic field energy to frequency band B l 2 to
`
`0012
`
`

`
`
`
`US 9,059,599 B2
`
`5
`group charge mobile devices-1, 2 (210, 220) for section t1, t3,
`t5, .
`.
`.
`, provide magnetic field energy to frequency band B34
`to group charge mobile devices-3, 4 (230, 240) for section t2,
`t4, t6.
`Meanwhile, it is possible to perform multi charging based
`on an order of priority. That is, it is possible to grant an order
`of priority to mobile devices 210, 220, 230, 240, and charge
`them one by one or in groups according to the charging order
`of priority. The charging order of priority may be determined
`in consideration of the type, state of battery charge, and
`remaining battery time of the mobile devices 210, 220, 230,
`240. Not only that,
`it is possible to further apply a time
`division charging method to the multi charging method which
`is based on the order of priority.
`3. Multi Charging Relay
`It is possible to operate some of the mobile devices located
`near the charging base station 100 to function as energy relays
`which wireles sly relay magnetic field energy. An energy relay
`is a device which transmits magnetic field energy wirelessly
`received from the charging base station 100 to another mobile
`device nearby, and thus expands the wireless approaching
`range of the magnetic field energy. A mobile device located
`outside charging region A may also be charged by the energy
`relay.
`The mobile devices to function as energy relays of among
`a plurality of the mobile devices located nearby are selected
`by the charging base station 100. A mobile device selected as
`an energy relay does not transmit magnetic field energy wire-
`lessly received from the charging base station 100 to load, but
`reflects it and then relays it to another mobile device nearby.
`The charging base station 100 selects an energy relay based
`on a distance/location of the mobile devices. More specifi-
`cally, as illustrated in FIG. 6, the charging base station 100
`may select mobile device-1 (210) located near it as an energy
`relay, and enable mobile device-2 (220) located outside
`charging region A to be charged.
`Meanwhile, the charging base station 100 may select a
`mobile device of which a state of battery charge is good as an
`energy relay. For example, as illustrated in FIG. 7, the charg-
`ing base station 100 may select mobile device-2 (220) which
`has a better state of battery charge of among the mobile
`devices 210, 220 located near it as an energy relay, and may
`enable mobile device-3 (230) located outside charging region
`A to be charged.
`Meanwhile, it is possible for a mobile device selected as an
`energy relay to perform both the charging and energy relay-
`ing. For example, a mobile device may use some of received
`energy to charge itself, and relay the rest of the energy to
`another mobile device.
`
`4. Multi Charging Base Station
`In the charging system explained so far, there was only one
`charging base station. However, it is also possible to embody
`the charging base station to be more than one, as illustrated in
`FIG. 8.
`
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`
`According to FIG. 8, there are 3 charging base stations 110,
`120, 130 near the mobile device 200. The mobile device 200
`may select one of the charging base stations 110, 120, 130,
`and receive magnetic field energy wireles sly from the
`selected charging base station, and charge its battery.
`Selecting a charging base station may be possible manually
`by a user of the mobile device 200. That is, a list created by
`scanning the charging base stations 110, 120, 130 located
`near the mobile device 200 may be displayed so that the user
`can select a charging base station.
`The charging base stations in the list need not be limited to
`the charging base stations located in the charging region.
`0013
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`65
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`60
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`6
`Charging base stations located in the communication region
`may be listed as a candidate group.
`Other than a manual selection by a user, the mobile device
`200 may be embodied to automatically select a charging base
`station. For example, it is possible for the mobile device 200
`to automatically select a charging base station of which the
`strength of the magnetic field energy received wirelessly is
`the greatest of among the scanned charging base stations 110,
`120, 130, and to receive the magnetic field energy from the
`selected charging base station and use it.
`Besides the above, it is possible for the mobile device 200
`to calculate distances from itself to the charging base stations
`110, 120, 130, and select the charging base station located the
`nearest.
`
`Otherwise, it is also possible for the mobile device 200 to
`be connected to the charging base stations 110, 120, 130,
`receive information on the number of mobile devices being
`charged, and select a charging base station based on that
`information. For example, in a case where 2 mobile devices
`are receiving magnetic field energy from charging base sta-
`tion-1 (110) and are being charged, 3 mobile devices are
`receiving magnetic field energy from charging base station-2
`(120) and are being charged, and 1 mobile device is receiving
`magnetic field energy from charging base station-3 (130) and
`is being charged, the mobile device 200 may select charging
`base station-3 (130) as the charging base station from which
`to receive energy.
`Although a few embodiments ofthe present invention have
`been shown and described, it would be appreciated by those
`skilled in the art that changes may be made in this embodi-
`ment without departing from the principles and spirit of the
`invention, the scope ofwhich is defined in the claims and their
`equivalents.
`
`What is claimed is:
`
`1. A wireless charging method comprising:
`selecting a portion of mobile devices located in a charging
`region as a group based on identification information
`transmitted from the mobile devices upon entering a
`communication region outside the charging region;
`selecting a portion of the mobile devices as a first group;
`selecting another portion ofthe mobile devices as a second
`gr01113
`determining to allow allocation of energy to the mobile
`devices in the group;
`determining to deny allocation of energy to other mobile
`devices not selected as belonging to the group;
`determining an allocation amount and provision time of
`energy to the mobile devices in the group based on the
`identification information;
`providing energy intended to wirelessly charge the mobile
`devices in the group to the mobile devices in the group
`according to the determined allocation amount and pro-
`vision time; and
`selecting a portion of the mobile devices located in the
`charging region as energy relays which relay magnetic
`field energy wirelessly,
`wherein the identification information comprises member-
`ship information to a predetermined group for which
`charging is allowed, and
`wherein the providing provides energy intended to wire-
`lessly charge the mobile devices in the first group and
`energy intended to wirelessly charge the mobile devices
`in the second group in a time division method.
`2. The method according to claim 1, wherein the providing
`provides magnetic field energy to a frequency band including
`resonant frequencies of the mobile devices in the group.
`
`0013
`
`

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`
`
`US 9,059,599 B2
`
`8
`devices upon entering a communication region outside
`the charging region, determines to allow allocation of
`energy to the mobile devices in the group, determines to
`deny allocation of energy to other mobile devices not
`selected as belonging to the group, determines an allo-
`cation amount and provision time of energy to the
`mobile devices in the group based on the identification
`information, and provides energy intended to wirelessly
`charge the mobile devices in the group to the mobile
`devices in the group according to the determined allo-
`cation amount and provision time,
`wherein the identification information comprises member-
`ship information to a predetermined group for which
`charging is allowed,
`wherein the selecting comprises:
`selecting a portion of the mobile devices as a first group;
`and
`
`selecting another portion of the mobile devices as a
`second group,
`wherein a portion of the mobile devices located in the
`charging region are energy relays which relay magnetic
`field energy wirelessly, and
`wherein the providing provides energy intended to wire-
`lessly charge the mobile devices in the first group and
`energy intended to wirelessly charge the mobile devices
`in the second group in a time division method.
`*
`*
`*
`*
`*
`
`5
`
`7
`3. The method according to claim 1 further comprising:
`granting a charging order of priority to the mobile devices
`located in the charging region; and
`providing energy to the mobile devices, according to the
`granted charging order of priority.
`4. The method according to claim 3, wherein the charging
`order of priority is determined considering at least one of
`type, state of battery charge, remaining battery time and dis-
`tance to the charging base station.
`5. The method according to claim 1, wherein the selecting 10
`of the portion of the mobile devices located in the charging
`region as energy relays which relay magnetic field energy
`wirelessly comprises selecting a portion ofthe mobile devices
`as the energy relays, considering locations and states of bat-
`tery charge of the mobile devices.
`6. The method according to claim 1, further comprising:
`determining, based on a movement trace ofa mobile device
`of the mobile devices, whether to perform charging of
`the mobile device.
`
`15
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`7. The method according to claim 1, wherein the providing 20
`is begun after a predetermined time delay from when a mobile
`device ofthe mobile devices enters the communication region
`outside the charging region.
`8. A wireless charging system comprising:
`mobile devices; and
`a charging device which selects a portion ofmobile devices
`located in a charging region as a group based on identi-
`fication information transmitted from the mobile
`
`25
`
`0014
`
`0014