US 6,212,403 B1
`(10) Patent N0.:
`(12) Unlted States Patent
`Ushiroda
`(45) Date of Patent:
`*Apr. 3, 2001
`
`
`U5006212403B1
`
`(54) WIRELESS TELEPHONE BATTERY
`CHARGING WHILE PERFORMING DATA
`COMMUNICATIONS
`
`.
`-
`-
`-
`~
`~
`~
`~
`Inventor' ggfshl UShlmda’ ngaShthOShlma
`
`(75)
`
`(73) Assignee: Sharp Kabushiki Kaisha, Osaka (JP)
`
`(*) Notice:
`
`This patent issued on a continued pros-
`ecution application filed under 37 CFR
`.
`.
`1.53(d), and is subject to the twenty year
`.
`.
`patent
`term prov151ons of 35 U.S.C.
`154(a)(2)~
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U‘S’C’ 154(b) by 0 days.
`
`5,511,240 *
`4/1996 Nishiyama ........................... 455/573
`5,528,667 *
`6/1996 Steffensen etal.
`455/573
`
`5,566,226 * 10/1996 Mizoguchi et al.
`..
`455/558
`
`5,797,089 *
`8/1998 Nguyen .........
`455/557
`
`5,870,615 *
`2/1999 Bar—On et al.
`713/310
`7/1999 Theobald ............................. 455/573
`5,925,942 *
`FOREIGN PATENT DOCUMENTS
`
`7/1992 (EP).
`6/1993 (EP) ~
`3/1992 (JP).
`5/1993 (JP).
`5
`/1996 (JP).
`9/1996 (JP) .
`6/1997 (JP).
`7/1996 (W0) .
`
`0 494 780
`0 545 088
`4'72946
`5—130010
`8 130773
`-
`8—237345
`9—162960
`W0 96/21900
`.
`.
`* Cited by examiner
`Primary Examiner—Reinhard Eisenzopf
`Assistant Examiner—Eliseo Ramos-Feliciano
`
`(21) APP1~ N03 09/030,164
`
`(22)
`
`Filed:
`
`Feb. 25, 1998
`
`Foreign Application Priority Data
`(30)
`Jul. 3 1997
`(JP) ................................................... 9—177996
`7
`............................... H04B 1/38, H04M 1/00
`Int. Cl.
`(51)
`
`............
`455/557; 455/573; 455/572
`(52) US. Cl.
`(58) Field of Search ..................................... 455/572, 573,
`455/574, 557
`
`7
`
`(56)
`
`References Cited
`U.S. PATENT DOCUMENTS
`
`(74) Attorney, Agent, or Firm—Nixon & Vanderhye PC.
`
`(57)
`
`ABSTRACT
`
`A portable wireless communication device performing data
`communications through a network incmdes a secondary
`battery and an interface portion detachably connected to an
`external data terminal, for transmitting data to and receiving
`data from the external data terminal and for receiving an
`electric power from the external data terminal. The portable
`wireless communication device is alternately operated with
`at least one of an electric power from the secondary battery
`and the electric power input from the external data terminal
`through the interface portion.
`
`5,036,532 *
`
`7/1991 Metroka et al.
`
`..................... 455/572
`
`7 Claims, 1 Drawing Sheet
`
`
`
`Wireless te
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`
`
`
`4c
`{Data te-rm—inaT .
`
`
`Iconnecting portion
`
`
`
`Protocol
`Interface
`
`
`c1rcu1t
`converting
`
`
`
`
`External
`portion
`portion
`
`
`data
`
`
`terminal
`
`
`
`Voice
`.
`l
`
`converting
`
`
`
`portion
`
`
`Power source
`portion
`
`
`
`
`
`Charging
`
`
`
`circurt
`portion
`
`Charger charging
`
`tecting CerUlt“
`
`
`
`Control
`crrcuit
`portion
`
`Data terminal
`charging detecting
`circuit
`
`I 5f
`
`Charging
`control
`circuit
`
`
`
`
`
`
`
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`Display~-
`
`5c
`
`0 eration
`~-
`
`
`
`Power
`
`
`source
`portion
`
`
`
`
`
`
`Samsung Ex. 1411 p. 1
`
`Samsung Ex. 1411 p. 1
`
`

`

`US. Patent
`
`Apr. 3, 2001
`
`US 6,212,403 B1
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`Samsung Ex. 1411 p. 2
`
`Samsung Ex. 1411 p. 2
`
`
`
`
`
`

`

`US 6,212,403 B1
`
`1
`WIRELESS TELEPHONE BATTERY
`CHARGING WHILE PERFORMING DATA
`COMMUNICATIONS
`
`BACKGROUND OF THE INVENTION
`
`1. Field of the Invention
`
`The present invention relates to a portable wireless com-
`munication device used in the Personal Handy Phone Sys-
`tem (PHS) or the like.
`2. Description of the Related Art
`It is well-known that portable wireless communication
`devices perform data communications through a network.
`Some of the portable wireless communication devices are
`capable of being connected to an external data terminal of a
`personal computer, etc. Such a portable wireless communi-
`cation device transmits data to and receives data from the
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`external data terminal under the condition of being con-
`nected to the external data terminal, and interconnects the
`external data terminal and the network.
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`The portable wireless communication device as described
`above is usually operated by a secondary battery built
`therein. The secondary battery is charged by being placed on
`a charger dedicated to the portable wireless communication
`device.
`
`the above-mentioned conventional portable
`However,
`wireless communication device is not adapted to be con-
`nected to the external data terminal while placed on the
`charger. The interconnection between the external data ter-
`minal and the network is performed only with an electric
`power from the built-in secondary battery. Therefore, the
`interconnection is effected only until the secondary battery
`is exhausted.
`
`Compared with normal calls, a longer period of time is
`likely to be spent on, for example, data communications
`performed during the operation of the external data terminal
`(personal computer) as
`in personal computer
`communications, and data communications requiring a time
`for collecting information as in the internet.
`Therefore, in the case where the interconnection between
`the external data terminal and the network through the
`portable wireless communication device is performed only
`with the electric power from the secondary battery as
`described above,
`the data communications may be inter-
`rupted due to the exhaustion of the secondary battery, which
`prevents the data communications from being performed in
`a normal manner.
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`Even when assuming the structure in which the portable
`wireless communication device is capable of being con-
`nected to the external data terminal under the condition of
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`being placed on the charger, there is a problem that the
`peripheral
`I/O of the portable wireless communication
`device becomes complicated.
`SUMMARY OF THE INVENTION
`
`A portable wireless communication device performing
`data communications through a network of the present
`invention includes: a secondary battery; and an interface
`portion detachably connected to an external data terminal,
`for transmitting data to and receiving data from the external
`data terminal and for receiving an electric power from the
`external data terminal, wherein the portable wireless com-
`munication device is operated with at least one of an electric
`power from the secondary battery and the electric power
`input from the external data terminal through the interface
`portion.
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`2
`In one embodiment of the present invention, the above-
`mentioned portable wireless communication device
`includes: a data terminal circuit portion for transmitting data
`to and receiving data from the external data terminal through
`the interface portion; and a network circuit portion for
`transmitting data to and receiving data from the network, the
`portable wireless communication device interconnecting the
`external data terminal and the network.
`
`In another embodiment of the present invention, in a case
`where the electric power input from the external data ter-
`minal through the interface portion is excessive, the sec-
`ondary battery is charged with the excessive electric power.
`In another embodiment of the present invention, in a case
`where the electric power input from the external data ter-
`minal through the interface portion is insufficient, the insuf-
`ficient electric power is compensated for with the electric
`power from the secondary battery.
`the
`invention,
`In another embodiment of the present
`above-mentioned portable wireless communication device
`includes an external electric power rejecting portion for
`rejecting the electric power from the external data terminal
`through the interface portion.
`the
`invention,
`In another embodiment of the present
`above-mentioned portable wireless communication device
`includes an external electric power rejecting portion for
`rejecting the electric power from the external data terminal
`through the interface portion and stopping a supply of the
`electric power to the network circuit portion.
`Thus, the invention described herein makes possible the
`advantage of providing a portable wireless communication
`device capable of interconnecting an external data terminal
`and a network for a long period of time without using a
`charger.
`This and other advantages of the present invention will
`become apparent to those skilled in the art upon reading and
`understanding the following detailed description with refer-
`ence to the accompanying figures.
`
`BRIEF DESCRIPTION OF THE DRAWING
`
`FIG. 1 is a block diagram showing an embodiment of a
`portable wireless communication device of the present
`invention.
`
`DESCRIPTION OF THE PREFERRED
`EMBODIMENTS
`
`Hereinafter, the present invention will be described by
`way of an illustrative embodiment with reference to the
`drawing.
`FIG. 1 is a block diagram showing an embodiment of a
`portable wireless communication device of the present
`invention. A portable wireless communication device 1 of
`the present embodiment is a portable wireless telephone
`which includes a data terminal connecting portion 4 and a
`wireless telephone portion 5.
`The data terminal connecting portion 4 includes a con-
`nector 4a, an interface circuit portion 4b, a protocol con-
`verting portion 4c, a control portion 4d, and a power source
`portion 46. An external data terminal 2 is detachably con-
`nected to the connector 4a. The external data terminal 2 is
`
`a personal computer, for example. Data is transmitted/
`received between the interface circuit portion 4b and the
`external data terminal 2 when the external data terminal 2 is
`
`connected to the connector 4a. The interface circuit portion
`4b outputs data from the external data terminal 2 to the
`protocol converting portion 4c, and transmits data from the
`
`Samsung Ex. 1411 p. 3
`
`Samsung Ex. 1411 p. 3
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`

`

`US 6,212,403 B1
`
`3
`protocol converting portion 46 to the external data terminal
`2. The protocol converting portion 46 converts a data
`transmission procedure of the external data terminal 2 to a
`data transmission procedure of the wireless telephone por-
`tion 5, or vice versa, thereby enabling data to be transmitted/
`received between the external data terminal 2 and the
`
`network. The control portion 4d has control over the inter-
`face circuit portion 4b and the protocol converting portion
`4c.
`
`Electric power is supplied from the external data terminal
`2 to the power source portion 46 when the external data
`terminal 2 is connected to the connector 4a. The power
`source portion 46 supplies the electric power from the
`external data terminal 2 to the interface circuit portion 4b,
`the protocol converting portion 4c, the control portion 4d,
`etc.
`
`The wireless telephone portion 5 includes an interface
`circuit portion 5a, a display portion 5b, an operation portion
`5c, a voice converting portion 5d, a wireless portion 56, a
`control or network circuit portion 513 a power source portion
`5g, a secondary battery 5h, a data terminal charging detect-
`ing circuit 5l, a charging control circuit 5m, two diodes D1
`and D2, a charger charging detecting circuit 51', a charging
`circuit portion 5k, and a charging terminal 51'.
`The interface circuit portion 5a inputs data from the
`protocol converting portion 46 to the control circuit portion
`513 and outputs data from the control circuit portion 5f to the
`protocol converting portion 46. The display portion 5b
`performs various display functions.
`The operation portion Sc has various keys, and the por-
`table wireless telephone 1 is operated by pressing these keys.
`The voice converting portion 5d includes an ADPCM codec,
`a microphone, a receiver, etc. (not shown).
`The voice converting portion 5d encodes a voice signal
`output from the microphone into voice data, decodes the
`voice data into a voice signal, and adds the voice signal to
`the receiver. The wireless portion Se performs wireless
`communications with a base station. A network (not shown,
`e.g., a public channel network) including the base station is
`connected to the wireless portion Se by conventional wire-
`less communication technology.
`In the case where a telephone call is made through the
`portable wireless telephone 1, a call is originated by pressing
`keys of the operation portion 5c. In response to the origi-
`nation of a call, the control circuit portion 5f allows prede-
`termined data to be transmitted/received between the base
`station of the network and the wireless telephone 1 through
`the wireless portion 56. Thus,
`the wireless portion Se is
`connected to the network. Furthermore, the control circuit
`portion 5f calls the data terminal of a computer of a
`communication partner through the network so as to connect
`the wireless portion Se to the terminal of a computer of the
`communication partner through the network.
`When receiving voice data from the voice converting
`portion 5d when the wireless portion Se is connected to the
`data terminal of a computer of the communication partner,
`the control circuit portion 5f transmits the voice data from
`the wireless portion Se to the data terminal of a computer of
`the communication partner through the network. Moreover,
`when the wireless portion Se receives voice data from the
`data terminal of a computer of the communication partner
`through the network, the control circuit portion 5f outputs
`the voice data to the voice converting portion 5d.
`In the case where the external data terminal 2 and the
`
`network are interconnected through the portable wireless
`telephone 1, predetermined communication software is
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`started in the external data terminal 2 (personal computer),
`thereby generating data required for calling. Thereafter, the
`data is transmitted to the data terminal connecting portion 4.
`In the data terminal connecting portion 4, the data is input
`to the protocol converting portion 46 through the interface
`circuit portion 4b. In the protocol converting portion 4c, the
`data is converted to comply with the wireless telephone
`portion communication protocol and transmitted to the wire-
`less telephone portion 5.
`In the wireless telephone portion 5, the data is input to the
`control circuit portion 5f through the interface circuit portion
`5a. In response to the data, the control circuit portion 5f
`allows predetermined data to be received/transmitted
`between the base station of the network and the wireless
`telephone 1 through the wireless portion 56, thereby con-
`necting the wireless portion Se to the network. Furthermore,
`the control circuit portion 5f calls the data terminal of a
`computer of the communication partner through the
`network, thereby connecting the wireless portion Se to the
`data terminal of a computer of the communication partner
`through the network.
`When receiving data from the external data terminal 2
`through the data terminal connecting portion 4 when the
`wireless portion Se is connected to the data terminal of a
`computer of the communication partner, the control circuit
`portion 5f transmits the data from the wireless portion Se to
`the data terminal of a computer of the communication
`partner through the network. When receiving data from the
`data terminal of a computer of the communication partner
`through the wireless portion 56, the control circuit portion 5f
`outputs the data to the external data terminal 2 through the
`data terminal connecting portion 4.
`In addition, FIG. 1 includes a charger 3 which is detach-
`ably connected to the charging terminal 51'. A current is
`supplied from the charger 3 to the secondary battery 5h and
`the power source portion 5g through the diode D1 and a
`charging control circuit 5m when the charger 3 is connected
`to the charging terminal 51'. The charger charging detecting
`circuit 51' detects a current from the charger 3, and informs
`the control circuit portion 5f of the detection result.
`When electric power is supplied from the external data
`terminal 2 to the power source portion 46 when the external
`data terminal 2 is connected to the connector 4a, electric
`power is supplied from the power source portion 46 to the
`charging circuit portion 5k. The charging circuit portion 5k
`generates and outputs a charging current, which controls a
`current and a constant voltage with respect to the charging
`current. The current from the charging circuit portion 5k is
`supplied to the secondary battery 5h and the power source
`portion 5g through the diode D2 and the charging control
`circuit 5m. The data terminal charging detecting circuit 51
`detects a current from the external data terminal 2, and
`informs the control circuit portion 5f of the detection result.
`The power source portion 5g supplies an electric power
`from the secondary battery 5h to each part of the wireless
`telephone portion 5.
`The charging control circuit 5m performs an on/off con-
`trol with regard to a charging current (i.e., allows a charging
`current to flow to the secondary battery 5h or blocks it).
`The supply of electric power in the case where the
`external data terminal 2 is connected to the connector 4a in
`
`the portable wireless communication device 1 with the
`above-mentioned structure will be described in detail. In this
`
`example it is assumed that the charger 3 is not connected to
`the charging terminal 51'.
`First, when the external data terminal 2 is connected to the
`connector 4a, an electric power is supplied from the external
`
`Samsung Ex. 1411 p. 4
`
`Samsung Ex. 1411 p. 4
`
`

`

`US 6,212,403 B1
`
`5
`data terminal 2 to the power source portion 46 through the
`connector 4a of the data terminal connecting portion 4. The
`power source portion 46 therefore supplies the electric
`power to both the data terminal connecting portion 4 and the
`charging circuit portion 5K of the wireless telephone portion
`5. The charging circuit portion 5k generates a charging
`current, and supplies the current to the secondary battery 5h
`and the power source portion 5g through the diode D2 and
`the charging control circuit 5m.
`If the portable wireless communication device 1 is on
`standby in the above-mentioned state, the wireless portion
`Se merely intermittently receives data for the purpose of
`monitoring a control channel without using a speech chan-
`nel. In this case, since an electric power consumed for
`wireless communications is very small, most of the current
`supplied from the charging circuit portion 5k through the
`diode D2 and the charging control circuit 5m is supplied to
`the secondary battery 5h. More specifically, most of the
`current supplied from the power source portion 46 of the
`data terminal connecting portion 4 to the wireless telephone
`portion 5 is consumed for charging the secondary battery 5h.
`Furthermore,
`if data is being transmitted/received
`between the portable wireless communication device 1 and
`the network, the wireless portion Se transmits/receives data
`through the speech channel, and the amount of electric
`power consumed by the wireless portion Se increases. In this
`case, most of the current is supplied from the charging
`circuit portion 5k to the power source portion 5g through the
`diode D2 and the charging control circuit 5m, and only a
`very small charging current flows through the secondary
`battery 5h. Thus, most of the charging current is supplied
`from the power source portion 5g to each part of the wireless
`telephone portion 5, and is consumed for the operation of the
`wireless telephone portion 5.
`In the case where a current is not sufficient even when all
`
`the current supplied from the power source portion 46 of the
`data terminal connecting portion 4 to the wireless telephone
`portion 5 is supplied for operating the wireless telephone
`portion 5, a current output from the secondary battery 5h is
`added to the current from the power source portion 46, and
`the combined current is supplied to each part of the wireless
`telephone portion 5 through the power source portion 5g.
`Thus, a normal operation of the wireless telephone por-
`tion 5 is maintained.
`
`On the other hand, when a current is being supplied from
`the power source portion 46 of the data terminal connecting
`portion 4 to the wireless telephone portion 5,
`the data
`terminal charging detecting circuit 51 detects the current,
`and informs the control circuit portion 5f of the detection
`result. Thus, the control circuit portion 5f recognizes receipt
`of electric power from the power source portion 46 of the
`data terminal connecting portion 4. When a user of the
`portable wireless communication device 1 presses keys of
`the operation portion Sc in this state to designate the
`prohibition of current charging by the data terminal con-
`necting portion 4, in response thereto, the control circuit
`portion 5f controls the charging control circuit 5m so as to
`block the current from the data terminal connecting circuit
`4. As a result, the current from the data terminal connecting
`portion 4 stops flowing to the secondary battery 5k, and only
`the current output from the secondary battery 5h is supplied
`to each part of the wireless telephone portion 5 through the
`power source portion 5g, whereby the wireless telephone
`portion 5 is operated.
`For example, in the case where the external data terminal
`2 is driven by a secondary battery built
`therein,
`if the
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`secondary battery 5h of the portable wireless communica-
`tion device 1 is charged with electric power from the
`secondary battery of the external data terminal 2, and the
`portable wireless communication device 1 is operated with
`electric power from the secondary battery of the external
`data terminal 2, the secondary battery of the external data
`terminal 2 is immediately exhausted. Therefore, in such a
`case, electric power from the external data terminal 2 is
`rejected, whereby the life of the secondary battery of the
`external data terminal 2 can be prolonged, and the data
`communications by the external data terminal 2 can be
`performed in a normal manner for a long period of time.
`As described above, according to the present
`embodiment, electric power from the external data terminal
`2 can be used for operating the portable wireless commu-
`nication device 1. Furthermore, the secondary battery 5h
`built in the portable wireless communication device 1 can be
`charged with the electric power from the external data
`terminal 2 as well as the current
`from the charger 3.
`Furthermore,
`in the case where electric power from the
`external data terminal 2 is not sufficient for operating the
`wireless telephone portion 5, a normal operation of the
`wireless telephone portion 5 can be maintained by adding
`the current from the secondary battery 5h.
`In the present embodiment, only the wireless telephone
`portion 5 is operated with an electric power from the
`secondary battery 5h. However, the wireless telephone por-
`tion 5 and the data terminal connecting portion 4 may be
`operated together. Furthermore, in the present embodiment,
`a portable wireless telephone is illustrated as the portable
`wireless communication device 1. However,
`the present
`invention is not limited thereto. The present invention can be
`applied to other kinds of communication devices.
`Furthermore, although a personal computer is illustrated as
`the external data terminal, other kinds of data terminals may
`be used.
`
`As described above, according to the present invention,
`when connected to the external data terminal 2, the interface
`circuit portion 4b not only transmits data to and receives data
`from the external data terminal 2 but also receives electric
`
`power from the external data terminal 2. The portable
`wireless communication device 1 of the present invention is
`operated with electric power input from the external data
`terminal 2 through the interface circuit portion 4b, so that
`data can be transmitted to and received from the external
`
`data terminal and the network for a long period of time
`without consuming the built-in secondary battery 5h.
`For example, data communications performed using the
`external data terminal as in personal computer communica-
`tions and data communications requiring a time for collect-
`ing information as in the internet, which take a long period
`of time, can be performed in a normal manner without any
`interruption.
`Compared with the structure in which the portable wire-
`less communication device is connected to the external data
`
`terminal when placed on the charger, the peripheral I/O of
`the portable wireless communication device according to the
`present invention is less complicated.
`In one embodiment, the portable wireless communication
`device may include a data terminal circuit portion for
`transmitting data to and receiving data from the external data
`terminal, and a network circuit portion for transmitting data
`to and receiving data from the network, thereby intercon-
`necting the external data terminal and the network.
`In one embodiment,
`in the case where an excessive
`electric power is input from the external data terminal
`
`Samsung Ex. 1411 p. 5
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`Samsung Ex. 1411 p. 5
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`

`

`US 6,212,403 B1
`
`7
`through the interface circuit portion, the secondary battery
`may be charged with the excessive electric power. Because
`of this,
`the chances for charging the secondary battery
`increase, and the charging amount of the secondary battery
`increases, so that the operation time of the portable wireless
`communication device with only electric power from the
`secondary battery increases.
`In one embodiment, in the case where insufficient electric
`power is input from the external data terminal through the
`interface circuit portion, the insufficient electric power may
`be compensated for with electric power from the secondary
`battery. This enables a required amount of current to be
`supplied to the portable wireless communication device
`even when the current for operating the portable wireless
`communication device is varied, whereby the portable wire-
`less communication device can be driven stably.
`In one embodiment, an external electric power rejecting
`portion for rejecting electric power from the external data
`terminal through the interface circuit portion may be pro-
`vided. Alternatively, an external 5 electric power rejecting
`portion for rejecting electric power from the external data
`terminal through the interface circuit portion and stopping
`the supply of the electric power to the network circuit
`portion may be provided.
`For example, in the case where the external data terminal
`is driven by a secondary battery built therein, if the second-
`ary battery of the portable wireless communication device is
`charged with and operated with an electric power from the
`secondary battery of the external data terminal, the second-
`ary battery of the external data terminal
`is immediately
`consumed. Therefore, an electric power from the external
`data terminal is rejected, whereby the life of the secondary
`battery of the external data terminal can be prolonged, and
`the data communications by the external data terminal can
`be performed in a normal manner for a long period of time.
`Various other modifications will be apparent to and can be
`readily made by those skilled in the art without departing
`from the scope and spirit of this invention. Accordingly, it is
`not intended that the scope of the claims appended hereto be
`limited to the description as set forth herein, but rather that
`the claims be broadly construed.
`What is claimed is:
`
`1. A portable wireless communication device performing
`data communications through a network, comprising:
`a secondary battery; and
`an interface portion detachably connected to an external
`data terminal, for transmitting data to and receiving
`data from the external data terminal and for receiving
`an electric power from the external data terminal with-
`out an impedance circuit,
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`8
`wherein the portable wireless communication device is
`alternately operated with at least one of an electric
`power from the secondary battery and the electric
`power input from the external data terminal through the
`interface portion.
`2. Aportable wireless communication device according to
`claim 1, comprising:
`a data terminal circuit portion for transmitting data to and
`receiving data from the external data terminal through
`the interface portion; and
`a network circuit portion for transmitting data to and
`receiving data from the network,
`the portable wireless communication device interconnect-
`ing the external data terminal and the network.
`3. Aportable wireless communication device according to
`claim 1, wherein in a case where the electric power input
`from the external data terminal through the interface portion
`is excessive,
`the secondary battery is charged with the
`excessive electric power.
`4. Aportable wireless communication device according to
`claim 1, wherein in a case where the electric power input
`from the external data terminal through the interface portion
`is insufficient, the insufficient electric power is compensated
`for with the electric power from the secondary battery.
`5. Aportable wireless communication device according to
`claim 1, comprising an external electric power rejecting
`portion for rejecting the electric power from the external
`data terminal through the interface portion.
`6. Aportable wireless communication device according to
`claim 2, comprising an external electric power rejecting
`portion for rejecting the electric power from the external
`data terminal through the interface portion and stopping a
`supply of the electric power to the network circuit portion.
`7. A portable wireless communication device performing
`data communications through a network, comprising:
`a secondary battery; and
`an interface portion detachably connected to an external
`data terminal, for transmitting data to and receiving
`data from the external data terminal and for receiving
`an electric power from the external data terminal with-
`out an impedance circuit,
`wherein the portable wireless communication device is
`alternately operated with at least one of an electric
`power from the secondary battery and the electric
`power input from the external data terminal in accor-
`dance with an electric power source of the external data
`terminal.
`
`Samsung Ex. 1411 p. 6
`
`Samsung Ex. 1411 p. 6
`
`