JP2005287278A - Device and method for controlling charge of electronic terminal - Google Patents

Device and method for controlling charge of electronic terminal Download PDF

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JP2005287278A
JP2005287278A JP2004102232A JP2004102232A JP2005287278A JP 2005287278 A JP2005287278 A JP 2005287278A JP 2004102232 A JP2004102232 A JP 2004102232A JP 2004102232 A JP2004102232 A JP 2004102232A JP 2005287278 A JP2005287278 A JP 2005287278A
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battery
charging
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current supply
electronic terminal
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Tetsushi Nomura
哲史 野村
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Casio Computer Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract

<P>PROBLEM TO BE SOLVED: To control charging between a mobile phone as an electronic terminal and a PDA. <P>SOLUTION: Each of the mobile phone 1 and the PDA 2 are provided with a battery, a remaining capacity detector, and a power-supply control unit. When the PDA 2 is connected to the mobile phone 1 via a USB-OTG cable 3 so as to use the PDA 2 as a master and the mobile phone as a slave, the power-supply control unit of the mobile phone 1 reads out the remaining capacity information of the battery of the mobile phone 1 stored in the memory from a memory, and receives the remaining capacity information of the battery of the PDA 2 from the PDA 2. If the remaining capacity of the battery of the PDA 2 exceeds that of the mobile phone 1, the power-supply control unit of the mobile phone 1 charges the battery of the mobile phone 1, and if it becomes less than the remaining capacity of the mobile phone 1, the power supply of the mobile phone 1 stops charging the battery of the mobile phone 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、電子端末の充電制御装置及び電子端末の充電制御方法に関するものである。   The present invention relates to an electronic terminal charging control apparatus and an electronic terminal charging control method.

近年、ＵＳＢ（Universal Serial Bus）の普及に伴い、充電用電池を搭載した複数の電子端末、例えば、携帯情報端末（ＰＤＡ；Personal Digital Assistance、以後「ＰＤＡ」と記す。）と携帯電話機との間でＵＳＢ経由で充電を行う技術が提唱されている（例えば、特許文献１参照）。
特開２００３−６１２５６号公報（第５−１１頁、図１，２） In recent years, with the spread of USB (Universal Serial Bus), a plurality of electronic terminals equipped with a charging battery, for example, a personal digital assistant (PDA; Personal Digital Assistance, hereinafter referred to as “PDA”) and a mobile phone. Has been proposed (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2003-61256 (page 5-11, FIGS. 1 and 2)

しかし、従来のこのような電子端末が搭載する充電用電池の容量は、それほど大きいものではない。このような複数の電子端末の間で充電を行った場合、電流供給側電子端末は、自らも電力を消費し、加えて電流被供給側電子端末にも電流を供給しなければならない。   However, the capacity of the charging battery mounted on such a conventional electronic terminal is not so large. When charging is performed between such a plurality of electronic terminals, the current supply-side electronic terminal itself consumes power and must supply current to the current-supplied-side electronic terminal.

このため、電流供給側電子端末の電池残量と電流被供給側電子端末との電池残量とが不当に逆転し、電流供給側電子端末の稼働時間が、電流被供給側電子端末の稼働時間よりも短くなってしまうという事態も起こりうる。   For this reason, the remaining battery level of the current supply-side electronic terminal and the remaining battery level of the current-supplied side electronic terminal are unduly reversed, and the operation time of the current supply-side electronic terminal is It can happen that it becomes shorter than that.

前記特許文献１のものでは、ＵＳＢケーブルの向きを差し替えて、充電方向を変更することにより、このような事態を回避している。しかし、かかる方法では、電流供給側電子端末、電流被供給側電子端末の動作を一時中断させなければならず、例えば、ＰＤＡに携帯電話機を接続して通信を行う場合に、通信を一時途絶させなければならなくなる。   In the thing of the said patent document 1, such a situation is avoided by changing direction of a USB cable and changing a charging direction. However, in such a method, the operations of the current supply-side electronic terminal and the current-supplied-side electronic terminal must be temporarily suspended. For example, when communication is performed by connecting a mobile phone to a PDA, communication is temporarily interrupted. Will have to.

本発明は、このような従来の問題点に鑑みてなされたもので、電流供給側電子端末の電流供給用電池と電流被供給側電子端末の充電用電池との電池残量を適正な量とすることが可能な電子端末の充電制御装置及び電子端末の充電制御方法を提供することを目的とする。   The present invention has been made in view of such a conventional problem, and the remaining amount of the battery between the current supply battery of the current supply side electronic terminal and the charge battery of the current supply side electronic terminal is set to an appropriate amount. An object of the present invention is to provide an electronic terminal charging control apparatus and an electronic terminal charging control method that can be performed.

この目的を達成するため、本発明の第１の観点に係る電子端末の充電制御装置は、
電流供給側電子端末の電流供給用電池から電流被供給側電子端末の充電用電池への充電制御を行う電子端末の充電制御装置において、
前記充電用電池の残容量に関する電池残量情報を取得する第１の電池残量情報取得部と、
前記電流供給用電池の残容量に関する電池残量情報を取得する第２の電池残量情報取得部と、
前記第１の電池残量取得部が取得した電池残量情報と前記第２の電池残量情報取得部が取得した電池残量情報とを参照し、参照した電池残量情報に基づいて、前記充電用電池への充電を制御する充電制御部と、を備えたことを特徴とする。 In order to achieve this object, a charging control device for an electronic terminal according to the first aspect of the present invention provides:
In the charging control device of the electronic terminal that performs charging control from the current supply battery of the current supply side electronic terminal to the charging battery of the current supply side electronic terminal,
A first battery level information acquisition unit for acquiring battery level information related to the remaining capacity of the charging battery;
A second battery remaining amount information acquisition unit for acquiring remaining battery amount information related to the remaining capacity of the current supply battery;
Refer to the remaining battery level information acquired by the first remaining battery level acquisition unit and the remaining battery level information acquired by the second remaining battery level information acquisition unit, and based on the referenced remaining battery level information, And a charge control unit that controls charging of the charging battery.

前記充電制御部は、参照した電池残量情報に基づいて、前記電流供給用電池の電池残量と前記充電用電池の電池残量とを比較して、その大小を判定し、前記電流供給用電池の電池残量が前記充電用電池の電池残量を越えていると判定した場合は、前記充電用電池への充電を行い、前記電流供給用電池の電池残量が前記充電用電池の電池残量以下と判定した場合は、前記充電を停止するようにしてもよい。   The charging control unit compares the remaining battery level of the current supply battery with the remaining battery level of the charging battery based on the referenced remaining battery level information, determines the magnitude thereof, and determines the current supply level. When it is determined that the remaining battery level of the battery exceeds the remaining battery level of the charging battery, charging is performed on the charging battery, and the remaining battery level of the current supply battery is equal to that of the charging battery. If it is determined that the remaining amount is equal to or less than the remaining amount, the charging may be stopped.

前記充電制御部は、参照した電池残量情報に基づいて、前記電流供給用電池の電池残量と前記充電用電池の電池残量とを比較して、その大小を判定し、前記電流供給用電池の電池残量が前記充電用電池の電池残量以下と判定した場合、前記電流供給用電池の電池残量が前記充電用電池の電池残量を越えていると判定した場合よりも充電電流が少なくなるように、前記充電用電池への充電電流を制御するようにしてもよい。   The charging control unit compares the remaining battery level of the current supply battery with the remaining battery level of the charging battery based on the referenced remaining battery level information, determines the magnitude thereof, and determines the current supply level. When it is determined that the remaining battery level of the battery is less than or equal to the remaining battery level of the charging battery, the charging current is greater than when it is determined that the remaining battery level of the current supply battery exceeds the remaining battery level of the charging battery. The charging current to the charging battery may be controlled such that the charging current is reduced.

前記第１の電池残量情報取得部は、前記電池残量情報として、前記充電用電池の満充電時の全電池容量と現在残っている現存電池容量とを取得し、
前記第２の電池残量情報取得部は、前記電池残量情報として、前記電流供給用電池の満充電時の全電池容量と現在残っている現存電池容量とを取得し、
前記充電制御部は、前記第１の電池残量取得部が取得した電池残量情報と前記第２の電池残量情報取得部が取得した電池残量情報とを参照し、参照した電池残量情報に基づいて、前記充電用電池の前記全電池容量と前記現存電池容量との比、前記電流供給用電池の前記全電池容量と前記現存電池容量との比をそれぞれ求め、求めた前記充電用電池の比、前記電流供給用電池の比を、それぞれ、前記充電用電池の電池残量率、電流供給用電池の電池残量率として両電池残量率を比較し、比較結果に基づいて、前記充電用電池への充電を制御するようにしてもよい。 The first battery remaining amount information acquisition unit acquires, as the battery remaining amount information, the total battery capacity at the time of full charging of the charging battery and the existing remaining battery capacity,
The second battery remaining amount information acquisition unit acquires, as the battery remaining amount information, the total battery capacity when the current supply battery is fully charged and the existing remaining battery capacity,
The charging control unit refers to the remaining battery level information acquired by the first remaining battery level acquisition unit and the remaining battery level information acquired by the second remaining battery level information acquisition unit, and refers to the remaining battery level Based on the information, the ratio of the total battery capacity of the charging battery to the existing battery capacity, the ratio of the total battery capacity of the current supply battery to the existing battery capacity, respectively, and the obtained charging The battery ratio, the ratio of the battery for current supply, the remaining battery ratio of the battery for charging, the remaining battery ratio of the battery for current supply are compared with each other, based on the comparison result, The charging of the charging battery may be controlled.

前記第１の電池残量情報取得部は、前記電池残量情報として、前記電流被供給側電子端末の消費電流と前記充電用電池の現在残っている現存電池容量とを取得して前記電流被供給側電子端末の稼働可能な稼働残り時間を求め、
前記第２の電池残量情報取得部は、前記電池残量情報として、前記電流供給側電子端末の消費電流と前記電流供給用電池の現在残っている現存電池容量とを取得して前記電流供給側電子端末の稼働可能な稼働残り時間を求め、
前記充電制御部は、両稼働残り時間を比較し、比較結果に基づいて、前記充電用電池への充電を制御するようにしてもよい。 The first battery remaining amount information acquiring unit acquires the current consumption of the current supplied electronic terminal and the current remaining battery capacity of the charging battery as the battery remaining amount information, and acquires the current covered amount. Find the remaining working time of the supply side electronic terminal,
The second battery remaining amount information acquisition unit acquires the current consumption of the current supply side electronic terminal and the current remaining battery capacity of the current supply battery as the battery remaining amount information, and supplies the current. The remaining working time of the electronic terminal
The charging control unit may compare both remaining operating times and control charging of the charging battery based on the comparison result.

本発明の第２の観点に係る電子端末の充電制御装置は、
電流供給側電子端末の電流供給用電池から電流被供給側電子端末の充電用電池への充電制御を行う電子端末の充電制御装置において、
前記電流供給側電子端末は、前記充電用電池への充電を制御する充電制御部を備えたことを特徴とする。 An electronic terminal charging control apparatus according to a second aspect of the present invention provides:
In the charging control device of the electronic terminal that performs charging control from the current supply battery of the current supply side electronic terminal to the charging battery of the current supply side electronic terminal,
The current supply side electronic terminal includes a charge control unit that controls charging of the charging battery.

前記充電制御部は、前記電流供給用電池の電池残量と前記電池残量に対して予め設定された閾値とを比較し、前記電流供給用電池の電池残量が前記閾値を越えている場合、前記充電用電池への充電を許可し、前記電流供給用電池の電池残量が前記閾値以下の場合、前記充電用電池への充電を不可とするようにしてもよい。   The charge control unit compares the remaining battery level of the current supply battery with a threshold value preset for the remaining battery level, and the remaining battery level of the current supply battery exceeds the threshold value. The charging battery may be allowed to be charged, and when the remaining battery level of the current supply battery is equal to or less than the threshold value, the charging battery may not be charged.

前記充電用電池への充電を制御する充電スイッチを備え、
前記充電制御部は、前記充電スイッチの開閉状態に基づいて、前記充電用電池への充電を制御するようにしてもよい。 A charge switch for controlling charging of the charging battery;
The charging control unit may control charging of the charging battery based on an open / closed state of the charging switch.

本発明の第３の観点に係る電子端末の充電制御方法は、
電流供給側電子端末の電流供給用電池から電流被供給側電子端末の充電用電池への充電を制御する電子端末の充電制御方法であって、
前記電流供給用電池の電池残量情報を取得するステップと、
前記充電用電池の電池残量情報を取得するステップと、
取得した電池残量情報を参照し、参照した電池残量情報に基づいて、前記電流供給用電池、前記充電用電池の電池残量の大小を判定するステップと、
前記判定結果に基づいて前記充電用電池への充電を制御するステップと、を備えたことを特徴とする。 An electronic terminal charging control method according to a third aspect of the present invention includes:
An electronic terminal charge control method for controlling charging from a current supply battery of a current supply side electronic terminal to a charge battery of a current supply side electronic terminal,
Obtaining battery remaining amount information of the current supply battery;
Obtaining battery remaining amount information of the charging battery;
A step of referring to the acquired battery remaining amount information, and determining the magnitude of the remaining amount of the current supply battery and the charging battery based on the referred battery remaining amount information;
Controlling charging of the charging battery based on the determination result.

本発明によれば、電流供給側電子端末の電流供給用電池と電流被供給側電子端末の充電用電池との電池残量を適正な量にすることができる。   ADVANTAGE OF THE INVENTION According to this invention, the battery residual amount of the battery for electric current supply of an electric current supply side electronic terminal and the battery for charge of an electric current supply side electronic terminal can be made into an appropriate quantity.

以下、本発明の実施形態に係る電子端末を図面を参照して説明する。
（実施形態１）
実施形態１では、電子端末として、図１に示すように、携帯電話機１とＰＤＡ２とが用いられた例について説明する。 Hereinafter, an electronic terminal according to an embodiment of the present invention will be described with reference to the drawings.
(Embodiment 1)
In the first embodiment, an example in which a mobile phone 1 and a PDA 2 are used as electronic terminals as shown in FIG. 1 will be described.

携帯電話機１とＰＤＡ２とは、ＵＳＢ−ＯＴＧ（ON-The-Go）ケーブル３を介して接続される。携帯電話機１、ＰＤＡ２は、それぞれ、ＵＳＢ−ＯＴＧケーブル３接続用のコネクタ１ｃ、２ｃを備える。   The cellular phone 1 and the PDA 2 are connected via a USB-OTG (ON-The-Go) cable 3. The cellular phone 1 and the PDA 2 include connectors 1c and 2c for connecting the USB-OTG cable 3, respectively.

ＵＳＢ−ＯＴＧは、ＵＳＢ対応の周辺機器同士をコンピュータを経由せずに直接接続して利用できるように規格化されたものである。ＵＳＢ−ＯＴＧでは、一方の電子端末をマスタ（装置）、他方の電子端末をスレーブ（装置）として用いることができる。   USB-OTG is standardized so that USB compatible peripheral devices can be directly connected without using a computer. In USB-OTG, one electronic terminal can be used as a master (device) and the other electronic terminal can be used as a slave (device).

ＵＳＢ−ＯＴＧケーブル３は、データラインと電源ラインＶＢＵＳとを有する。データラインは、接続された機器間でデータ伝送を行うためのラインであり、電源ラインＶＢＵＳは、接続された機器間で電流供給を行うためのラインである。   The USB-OTG cable 3 has a data line and a power supply line VBUS. The data line is a line for transmitting data between connected devices, and the power supply line VBUS is a line for supplying current between the connected devices.

ＵＳＢ−ＯＴＧケーブル３の両端には、Ａプラグ３Ａ、Ｂプラグ３Ｂが備えられている。Ａプラグ３Ａは、マスタ（装置）用のプラグであり、Ａプラグ３Ａがコネクタ１ｃ又は２ｃに接続されると、接続されたその装置は、マスタとして指定されたことを認識する。Ｂプラグ３Ｂは、スレーブ（装置）用のプラグであり、Ｂプラグ３Ｂがコネクタ１ｃ又は２ｃに接続されると、その装置は、スレーブとして指定されたことを認識する。   At both ends of the USB-OTG cable 3, an A plug 3A and a B plug 3B are provided. The A plug 3A is a master (device) plug. When the A plug 3A is connected to the connector 1c or 2c, the connected device recognizes that it has been designated as the master. The B plug 3B is a plug for a slave (device). When the B plug 3B is connected to the connector 1c or 2c, the device recognizes that the device is designated as a slave.

実施形態１では、ＰＤＡ２をマスタ、携帯電話機１をスレーブとして用いるものとして、ＰＤＡ２のコネクタ２ｃ、携帯電話機１のコネクタ１ｃに、それぞれ、ＵＳＢ−ＯＴＧケーブル３のＡプラグ３Ａ、Ｂプラグ３Ｂが接続される。   In the first embodiment, assuming that the PDA 2 is used as a master and the mobile phone 1 is used as a slave, the A plug 3A and the B plug 3B of the USB-OTG cable 3 are connected to the connector 2c of the PDA 2 and the connector 1c of the mobile phone 1, respectively. The

携帯電話機１は、図２に示すように、電池１１と、残量検知部１２と、メモリ１３と、表示部１４と、操作部１５と、送受信部１６と、電源制御部１７と、を備える。   As shown in FIG. 2, the mobile phone 1 includes a battery 11, a remaining amount detection unit 12, a memory 13, a display unit 14, an operation unit 15, a transmission / reception unit 16, and a power control unit 17. .

ＰＤＡ２は、電池２１と、残量検知部２２と、メモリ２３と、表示部２４と、操作部２５と、送受信部２６と、電源制御部２７と、を備える。   The PDA 2 includes a battery 21, a remaining amount detection unit 22, a memory 23, a display unit 24, an operation unit 25, a transmission / reception unit 26, and a power supply control unit 27.

ＰＤＡ２の電池２１、残量検知部２２、メモリ２３、表示部２４、操作部２５、送受信部２６、電源制御部２７は、それぞれ、携帯電話機１の電池１１、残量検知部１２、メモリ１３、表示部１４、操作部１５、送受信部１６、電源制御部１７と同様の機能を有するものである。ここでは、携帯電話機１の構成のみについて説明する。   The battery 21, the remaining amount detection unit 22, the memory 23, the display unit 24, the operation unit 25, the transmission / reception unit 26, and the power supply control unit 27 of the PDA 2 are respectively the battery 11, the remaining amount detection unit 12, the memory 13, and the mobile phone 1. The display unit 14, the operation unit 15, the transmission / reception unit 16, and the power supply control unit 17 have the same functions. Here, only the configuration of the mobile phone 1 will be described.

携帯電話機１の電池１１は、充電可能な電池である。残量検知部１２は、電池１１の残量を検知するためのものである。   The battery 11 of the mobile phone 1 is a rechargeable battery. The remaining amount detection unit 12 is for detecting the remaining amount of the battery 11.

残量検知部１２は、例えば、増幅器とＡ／Ｄコンバータとを備え（図示せず）、電池１１の電圧を検出することにより、電池１１の現存電池容量ＲＥＡＬ１を定期的に検知する。現存電池容量ＲＥＡＬ１は、電池１１に現在残っている容量であり、これから使用可能な容量を示す。残量検知部１２は、現存電池容量ＲＥＡＬ１を検知する毎にメモリ１３に記憶する。   The remaining amount detection unit 12 includes, for example, an amplifier and an A / D converter (not shown), and periodically detects the existing battery capacity REAL1 of the battery 11 by detecting the voltage of the battery 11. The existing battery capacity REAL1 is a capacity currently remaining in the battery 11, and indicates a capacity that can be used in the future. The remaining amount detection unit 12 stores the existing battery capacity REAL1 in the memory 13 each time it is detected.

メモリ１３は、携帯電話機１の動作に必要なデータを記憶するためのものである。また、メモリ１３は、電池１１の残量に関する電池残量情報として、現存電池容量ＲＥＡＬ１とともに電池１１の全電池容量ＣＡＰＡＣＩＴＹ１を予め記憶する。全電池容量ＣＡＰＡＣＩＴＹ１は、電池１１に満充電時の全電池容量を示し、電池１１によって決定される値である。   The memory 13 is for storing data necessary for the operation of the mobile phone 1. Further, the memory 13 stores in advance the total battery capacity CAPACITY1 of the battery 11 together with the existing battery capacity REAL1 as battery remaining capacity information regarding the remaining capacity of the battery 11. The total battery capacity CAPACITY 1 indicates the total battery capacity when the battery 11 is fully charged, and is a value determined by the battery 11.

表示部１４は、受信電波の信号レベル、通話状態等、携帯電話機１に必要な情報を表示するものであり、電池残量情報に基づいて、図１に示すような電池マークにより電池１１の電池残量率を表示する。電池残量率は、電池１１の全電池容量ＣＡＰＡＣＩＴＹ１と現存電池容量ＲＥＡＬ１との比（＝ＲＥＡＬ１／ＣＡＰＡＣＩＴＹ１）で表される。   The display unit 14 displays information necessary for the mobile phone 1 such as a signal level of a received radio wave, a call state, and the like. The battery mark of the battery 11 is indicated by a battery mark as shown in FIG. Displays the remaining capacity rate. The remaining battery rate is expressed as a ratio of the total battery capacity CAPACITY1 of the battery 11 and the existing battery capacity REAL1 (= REAL1 / CAPACITY1).

操作部１５は、携帯電話機１を操作するための数字キー等を備えたものである。
送受信部１６は、Ｂプラグ３Ｂ、コネクタ１ｃを介して、ＰＤＡ２との間でデータを送受信するためのものである。 The operation unit 15 includes numeric keys and the like for operating the mobile phone 1.
The transmission / reception unit 16 is for transmitting / receiving data to / from the PDA 2 via the B plug 3B and the connector 1c.

電源制御部１７は、ＣＰＵ（Central Processing Unit）、ＲＯＭ（Read Only Memory）、ＲＡＭ（Random Access Memory）等（図示せず）を備え、携帯電話機１の各部を制御するものである。   The power supply control unit 17 includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and the like (not shown), and controls each unit of the mobile phone 1.

電源制御部１７は、携帯電話機１のコネクタ１ｃにＵＳＢ−ＯＴＧケーブル３のＢプラグ３Ｂが接続されて、携帯電話機１がスレーブとして設定されたことを認識すると、充電準備モードに移行させる。そして、電源制御部１７は、携帯電話機１の電池残量情報とＰＤＡ２の電池残量情報とを取得して参照し、参照した両電池残量情報に基づいて、電池１１への充電を制御する。   When the power supply control unit 17 recognizes that the B plug 3B of the USB-OTG cable 3 is connected to the connector 1c of the mobile phone 1 and the mobile phone 1 is set as a slave, the power supply control unit 17 shifts to the charge preparation mode. Then, the power supply control unit 17 acquires and refers to the remaining battery level information of the mobile phone 1 and the remaining battery level information of the PDA 2, and controls charging to the battery 11 based on the referenced both remaining battery level information. .

具体的には、電源制御部１７は、携帯電話機１の電池残量情報をメモリ１３から読み出すことによって取得する。電源制御部１７は、ＰＤＡ２の電池残量情報の送信をＰＤＡ２に要求して、ＵＳＢ−ＯＴＧケーブル３のデータライン、送受信部１６を介してＰＤＡ２の電池残量情報を取得する。   Specifically, the power supply control unit 17 acquires the battery remaining amount information of the mobile phone 1 by reading it from the memory 13. The power supply control unit 17 requests the PDA 2 to transmit the remaining battery level information of the PDA 2 and acquires the remaining battery level information of the PDA 2 via the data line of the USB-OTG cable 3 and the transmission / reception unit 16.

尚、ＰＤＡ２のメモリ２３は、電池２１の残量に関する電池残量情報として、電池２１の全電池容量ＣＡＰＡＣＩＴＹ２と現存電池容量ＲＥＡＬ２とを記憶する。全電池容量ＣＡＰＡＣＩＴＹ２は、電池２１の満充電時の全電池容量を示し、電池２１によって決定される値である。メモリ２３は、全電池容量ＣＡＰＡＣＩＴＹ２を予め記憶する。   Note that the memory 23 of the PDA 2 stores the total battery capacity CAPACITY2 and the existing battery capacity REAL2 of the battery 21 as battery remaining capacity information regarding the remaining capacity of the battery 21. The total battery capacity CAPACITY 2 indicates the total battery capacity when the battery 21 is fully charged, and is a value determined by the battery 21. The memory 23 stores the total battery capacity CAPACITY2 in advance.

現存電池容量ＲＥＡＬ２は、電池２１に現在残っている容量であり、これから使用可能な容量を示す。残量検知部２２は、電池２１の電圧を検出することにより、電池２１の現存電池容量を定期的に検知してメモリ２３に記憶する。電源制御部２７は、携帯電話機１からＰＤＡ２の電池残量情報の送信要求があると、メモリ２３に記憶したＰＤＡ２の電池残量情報を携帯電話機１に送信する。   The existing battery capacity REAL2 is a capacity currently remaining in the battery 21, and indicates a capacity that can be used in the future. The remaining amount detection unit 22 detects the voltage of the battery 21 to periodically detect the existing battery capacity of the battery 21 and store it in the memory 23. When there is a transmission request for the remaining battery level information of the PDA 2 from the mobile phone 1, the power supply control unit 27 transmits the remaining battery level information of the PDA 2 stored in the memory 23 to the mobile phone 1.

電源制御部１７は、取得した電池１１の電池残量情報に基づいて電池１１の電池残量率（＝ＲＥＡＬ１／ＣＡＰＡＣＩＴＹ１）を求める。また、電源制御部１７は、取得した電池２１の電池残量情報に基づいて電池２１の電池残量率（＝ＲＥＡＬ２／ＣＡＰＡＣＩＴＹ２）を求める。   The power supply control unit 17 obtains a battery remaining rate (= REAL1 / CAPACITY1) of the battery 11 based on the acquired battery remaining information of the battery 11. Further, the power supply control unit 17 obtains the battery remaining rate (= REAL2 / CAPACITY2) of the battery 21 based on the acquired battery remaining amount information of the battery 21.

そして、電源制御部１７は、ＰＤＡ２の電池残量率と電池１１の電池残量率とを比較し、比較結果に基づいて電池１１への充電を制御する。   And the power supply control part 17 compares the battery remaining rate of PDA2, and the battery remaining rate of the battery 11, and controls the charge to the battery 11 based on a comparison result.

即ち、電源制御部１７は、ＰＤＡ２の電池残量率が携帯電話機１の電池残量率を越えている場合、ＰＤＡ２からの電流を電池１１に供給する。一方、ＰＤＡ２の電池残量率が携帯電話機１の電池残量率以下の場合、電源制御部１７は、電池１１への電流の供給を停止する。   That is, the power supply control unit 17 supplies current from the PDA 2 to the battery 11 when the battery remaining rate of the PDA 2 exceeds the battery remaining rate of the mobile phone 1. On the other hand, when the battery remaining rate of the PDA 2 is less than or equal to the battery remaining rate of the mobile phone 1, the power supply control unit 17 stops supplying current to the battery 11.

次に実施形態１に係る携帯電話機１とＰＤＡ２との動作を説明する。
携帯電話機１の電源制御部１７は、コネクタ１ｃにＵＳＢ−ＯＴＧケーブル３のＢプラグ３Ｂが接続されると、携帯電話機１がスレーブとして設定されたことを認識し、充電準備モードに移行させる。ＰＤＡ２の電源制御部２７は、コネクタ２ｃにＵＳＢ−ＯＴＧケーブル３のＡプラグ３Ａが接続されると、ＰＤＡ２がマスタとして設定されたことを認識する。 Next, operations of the mobile phone 1 and the PDA 2 according to the first embodiment will be described.
When the B plug 3B of the USB-OTG cable 3 is connected to the connector 1c, the power control unit 17 of the mobile phone 1 recognizes that the mobile phone 1 is set as a slave, and shifts to the charging preparation mode. When the A plug 3A of the USB-OTG cable 3 is connected to the connector 2c, the power control unit 27 of the PDA 2 recognizes that the PDA 2 is set as a master.

携帯電話機１のメモリ１３は、電池１１の全電池容量ＣＡＰＡＣＩＴＹ１を予め記憶する。残量検知部１２は、電池１１の現存電池容量ＲＥＡＬ１を定期的に検知する。残量検知部１２は、検知する毎に電池１１の現存電池容量ＲＥＡＬ１をメモリ１３に記憶する。   The memory 13 of the mobile phone 1 stores in advance the total battery capacity CAPACITY 1 of the battery 11. The remaining amount detection unit 12 periodically detects the existing battery capacity REAL1 of the battery 11. The remaining amount detection unit 12 stores the existing battery capacity REAL1 of the battery 11 in the memory 13 each time it is detected.

また、ＰＤＡ２のメモリ２３は、電池２１の全電池容量ＣＡＰＡＣＩＴＹ２を予め記憶する。残量検知部２２は、電池２１の現存電池容量ＲＥＡＬ２を定期的に検知する。残量検知部２２は、検知する毎に電池２１の現存電池容量ＲＥＡＬ２をメモリ２３に記憶する。   Further, the memory 23 of the PDA 2 stores in advance the total battery capacity CAPACITY 2 of the battery 21. The remaining amount detection unit 22 periodically detects the existing battery capacity REAL2 of the battery 21. The remaining amount detection unit 22 stores the existing battery capacity REAL2 of the battery 21 in the memory 23 every time it is detected.

携帯電話機１の電源制御部１７は、図３に示すフローチャートに従い、ＰＤＡ２の電源制御部２７と協働して電池１１の充電制御処理を定期的に実行する。
携帯電話機１の電源制御部１７は、メモリ１３から電池１１の電池残量情報として全電池容量ＣＡＰＡＣＩＴＹ１と現存電池容量ＲＥＡＬ１とを読み出す（ステップＳ１１）。 The power supply control unit 17 of the mobile phone 1 periodically executes the charging control process for the battery 11 in cooperation with the power supply control unit 27 of the PDA 2 according to the flowchart shown in FIG.
The power supply control unit 17 of the mobile phone 1 reads the total battery capacity CAPACITY1 and the existing battery capacity REAL1 as the remaining battery capacity information of the battery 11 from the memory 13 (step S11).

電源制御部１７は、ＰＤＡ２の電池残量情報の送信をＰＤＡ２に要求する（ステップＳ１２）。
ＰＤＡ２の電源制御部２７は、ＵＳＢ−ＯＴＧケーブル３のデータライン、送受信部２６を介して、携帯電話機１からの電池残量情報の送信要求を受信する（ステップＳ１３）。 The power supply control unit 17 requests the PDA 2 to transmit the battery remaining amount information of the PDA 2 (step S12).
The power supply control unit 27 of the PDA 2 receives the battery remaining amount information transmission request from the mobile phone 1 via the data line of the USB-OTG cable 3 and the transmission / reception unit 26 (step S13).

電源制御部２７は、メモリ２３から電池２１の電池残量情報として全電池容量ＣＡＰＡＣＩＴＹ２と現存電池容量ＲＥＡＬ２とを読み出す（ステップＳ１４）。
電源制御部２７は、読み出した電池残量情報を送受信部２６、ＵＳＢ−ＯＴＧケーブル３のデータラインを介して携帯電話機１に送信する（ステップＳ１５）。 The power supply control unit 27 reads the total battery capacity CAPACITY2 and the existing battery capacity REAL2 as the remaining battery capacity information of the battery 21 from the memory 23 (step S14).
The power supply control unit 27 transmits the read battery remaining amount information to the mobile phone 1 via the transmission / reception unit 26 and the data line of the USB-OTG cable 3 (step S15).

携帯電話機１の電源制御部１７は、送受信部１６を介してＰＤＡ２からの電池残量情報を受信する（ステップＳ１６）。   The power supply control unit 17 of the mobile phone 1 receives the battery remaining amount information from the PDA 2 via the transmission / reception unit 16 (step S16).

電源制御部１７は、メモリ１３から読み出した電池１１の電池残量情報と、ＰＤＡ２から受信した電池残量情報とに基づいて電池１１の電池残量率（＝ＲＥＡＬ１／ＣＡＰＡＣＩＴＹ１）と電池２１の電池残量率（＝ＲＥＡＬ２／ＣＡＰＡＣＩＴＹ２）とを求める。そして、電源制御部１７は、両電池残量率を比較する（ステップＳ１７）。   The power supply control unit 17 determines the remaining battery rate (= REAL1 / CAPACITY1) of the battery 11 and the battery of the battery 21 based on the remaining battery information of the battery 11 read from the memory 13 and the remaining battery information received from the PDA 2. The remaining amount rate (= REAL2 / CAPACITY2) is obtained. And the power supply control part 17 compares both battery remaining rate (step S17).

電源制御部１７は、マスタとしてのＰＤＡ２の電池２１の電池残量率が電池１１の電池残量率を越えているか否かを判定する（ステップＳ１８）。   The power supply control unit 17 determines whether or not the battery remaining rate of the battery 21 of the PDA 2 as the master exceeds the battery remaining rate of the battery 11 (step S18).

電池２１の電池残量率が電池１１の電池残量率を越えていると判定した場合（ステップＳ１８においてＹｅｓ）、電源制御部１７は、電池１１を充電する（ステップＳ１９）。これにより、ＰＤＡ２の電池２１から携帯電話機１の電池１１へ、ＵＳＢ−ＯＴＧケーブル３の電源ラインＶＢＵＳを介して電流が流れる。   When it is determined that the battery remaining rate of the battery 21 exceeds the battery remaining rate of the battery 11 (Yes in step S18), the power supply control unit 17 charges the battery 11 (step S19). As a result, a current flows from the battery 21 of the PDA 2 to the battery 11 of the mobile phone 1 through the power supply line VBUS of the USB-OTG cable 3.

電池２１の電池残量率が電池１１の電池残量率以下と判定した場合（ステップＳ１８においてＮｏ）、電源制御部１７は、電池１１への充電を停止する（ステップＳ２０）。即ち、電源制御部１７は、ＰＤＡ２の電池２１から携帯電話機１の電池１１への電流の流れを遮断する。このようにして電源制御部１７は、この充電制御処理を終了させる。   When it is determined that the battery remaining rate of the battery 21 is equal to or less than the battery remaining rate of the battery 11 (No in step S18), the power supply control unit 17 stops charging the battery 11 (step S20). That is, the power supply control unit 17 blocks the flow of current from the battery 21 of the PDA 2 to the battery 11 of the mobile phone 1. Thus, the power supply control part 17 complete | finishes this charge control process.

尚、電源制御部１７は、電池１１への充電停止後も、この充電制御処理を定期的に実行する。そして、電池２１の電池残量率が電池１１の電池残量率を越えていると判定した場合（ステップＳ１８においてＹｅｓ）、電源制御部１７は、再び、電池１１を充電する（ステップＳ１９）。   Note that the power supply control unit 17 periodically executes this charging control process even after the charging of the battery 11 is stopped. When it is determined that the battery remaining rate of the battery 21 exceeds the battery remaining rate of the battery 11 (Yes in step S18), the power supply control unit 17 charges the battery 11 again (step S19).

以上説明したように、本実施形態１によれば、携帯電話機１の電源制御部１７が、ＰＤＡ２の電池２１の電池残量率が電池１１の電池残量率以下になった場合、電源制御部１７が、電池１１への充電を停止するようにした。   As described above, according to the first embodiment, when the power control unit 17 of the mobile phone 1 has the battery remaining rate of the battery 21 of the PDA 2 equal to or less than the battery remaining rate of the battery 11, the power control unit 17 stopped charging the battery 11.

従って、ＵＳＢ−ＯＴＧケーブル３の向きを差し替えることなく、マスタの電池の電池残量率がスレーブの電池の電池残量率以下になるのを防止することができる。
また、ＰＤＡ２、携帯電話機１の動作を中断させることなく、携帯電話機１の電池１１への充電制御を行うことができ、通信中の場合でも、通信を継続して行うことができる。 Therefore, it is possible to prevent the battery remaining rate of the master battery from being equal to or lower than the battery remaining rate of the slave battery without changing the direction of the USB-OTG cable 3.
In addition, charging of the battery 11 of the mobile phone 1 can be controlled without interrupting the operations of the PDA 2 and the mobile phone 1, and communication can be continued even during communication.

（実施形態２）
実施形態２のものは、電流供給側電子端末の電流供給用電池、電流被供給側電子端末の電池の電池残量として、両電子端末の稼働残り時間を比較するようにしたものである。
実施形態２では、電子端末として、図４に示すように、ＰＤＡ２とコンピュータ４とが用いられた例について説明する。 (Embodiment 2)
In the second embodiment, the remaining operation time of both electronic terminals is compared as the remaining battery capacity of the current supply battery of the current supply side electronic terminal and the battery of the current supply side electronic terminal.
In the second embodiment, an example in which a PDA 2 and a computer 4 are used as electronic terminals as shown in FIG. 4 will be described.

コンピュータ４は、ＵＳＢケーブル３’に接続されるためのコネクタ４ｃを備える。実施形態２では、コンピュータ４をマスタ、ＰＤＡ２をスレーブとして用いるものとして、コンピュータ４のコネクタ４ｃ、ＰＤＡ２のコネクタ２ｃに、それぞれ、ＵＳＢケーブル３’のＡプラグ３Ａ、Ｂプラグ３Ｂが接続される。   The computer 4 includes a connector 4c for connecting to the USB cable 3 '. In the second embodiment, the computer 4 is used as a master and the PDA 2 is used as a slave, and the A plug 3A and the B plug 3B of the USB cable 3 'are connected to the connector 4c of the computer 4 and the connector 2c of the PDA 2, respectively.

実施形態２に係るコンピュータ４は、図５に示すように、電池４１と、残量検知部４２と、メモリ４３と、表示部４４と、操作部４５と、送受信部４６と、電源制御部４７と、を備える。電池４１、残量検知部４２、メモリ４３、表示部４４、操作部４５、送受信部４６、電源制御部４７は、それぞれ、図２に示す携帯電話機１の電池１１、残量検知部１２、メモリ１３、表示部１４、操作部１５、送受信部１６、電源制御部１７と同様の機能を有する。   As shown in FIG. 5, the computer 4 according to the second embodiment includes a battery 41, a remaining amount detection unit 42, a memory 43, a display unit 44, an operation unit 45, a transmission / reception unit 46, and a power control unit 47. And comprising. The battery 41, the remaining amount detection unit 42, the memory 43, the display unit 44, the operation unit 45, the transmission / reception unit 46, and the power supply control unit 47 are respectively the battery 11, the remaining amount detection unit 12, and the memory of the mobile phone 1 shown in FIG. 13, the display unit 14, the operation unit 15, the transmission / reception unit 16, and the power supply control unit 17 have the same functions.

次に、実施形態２に係るＰＤＡ２とコンピュータ４との動作を説明する。
ＰＤＡ２の電源制御部２７、コンピュータ４の電源制御部４７は、それぞれ、コネクタ２ｃ、コネクタ４ｃにＵＳＢケーブル３’のプラグが接続されると、スレーブ、マスタとして設定されたことを認識する。 Next, operations of the PDA 2 and the computer 4 according to the second embodiment will be described.
When the plug of the USB cable 3 ′ is connected to the connector 2c and the connector 4c, the power supply control unit 27 of the PDA 2 and the power supply control unit 47 of the computer 4 respectively recognize that they are set as a slave and a master.

ＰＤＡ２のメモリ２３は、電池２１の全電池容量を予め記憶する。残量検知部２２は、電池２１の現存電池容量を定期的に検知し、検知する毎にメモリ２３に記憶する。コンピュータ４のメモリ４３は、電池４１の全電池容量を予め記憶する。残量検知部４２は、電池４１の現存電池容量を定期的に検知し、検知する毎にメモリ４３に記憶する。   The memory 23 of the PDA 2 stores the total battery capacity of the battery 21 in advance. The remaining amount detector 22 periodically detects the existing battery capacity of the battery 21 and stores it in the memory 23 each time it is detected. The memory 43 of the computer 4 stores the total battery capacity of the battery 41 in advance. The remaining amount detection unit 42 periodically detects the existing battery capacity of the battery 41 and stores it in the memory 43 each time it is detected.

電源制御部２７は、ＰＤＡ２の消費電流と現存電池容量とをメモリ２３から取得し、電池２１の電池残量情報として、次の数１に従ってＰＤＡ２の稼働残り時間Ｈpdaを求める。

Figure 2005287278
電源制御部２７は、求めた稼働残り時間Ｈpdaをメモリ２３に記憶する。 The power supply control unit 27 acquires the current consumption and the existing battery capacity of the PDA 2 from the memory 23, and obtains the remaining operation time Hpda of the PDA 2 according to the following equation 1 as the battery remaining amount information of the battery 21.
Figure 2005287278
 The power supply control unit 27 stores the obtained remaining operation time Hpda in the memory 23.

また、電源制御部４７は、コンピュータ４の消費電流と現存電池容量とをメモリ４３から取得し、コンピュータ４の電池４１の電池残量情報として、次の数２に従ってコンピュータ４の稼働残り時間Ｈpcを求める。

Figure 2005287278
電源制御部４７は、求めた稼働残り時間Ｈpcをメモリ４３に記憶する。 Further, the power supply control unit 47 acquires the current consumption and the existing battery capacity of the computer 4 from the memory 43, and uses the remaining operation time Hpc of the computer 4 as the remaining battery amount information of the battery 41 of the computer 4 according to the following equation 2. Ask.
Figure 2005287278
 The power control unit 47 stores the obtained remaining operation time Hpc in the memory 43.

ＰＤＡ２の電源制御部２７は、メモリ２３からＰＤＡ２の稼働残り時間Ｈpdaを読み出す。また、電源制御部２７は、コンピュータ４に、電池４１の電池残量情報の送信を要求する。コンピュータ４の電源制御部４７は、電池４１の電池残量情報の送信要求を受信して、メモリ４３から電池残量情報として稼働残り時間Ｈpcを読み出し、読み出した電池４１の稼働残り時間ＨpcをＰＤＡ２に送信する。ＰＤＡ２の電源制御部２７は、電池４１の稼働残り時間Ｈpcを受信する。   The power supply control unit 27 of the PDA 2 reads the remaining operation time Hpda of the PDA 2 from the memory 23. Further, the power supply control unit 27 requests the computer 4 to transmit battery remaining amount information of the battery 41. The power control unit 47 of the computer 4 receives the request for transmitting the remaining battery amount information of the battery 41, reads the remaining operation time Hpc as the remaining battery amount information from the memory 43, and sets the read remaining operation time Hpc of the battery 41 to the PDA2. Send to. The power supply control unit 27 of the PDA 2 receives the remaining operation time Hpc of the battery 41.

ＰＤＡ２の電源制御部２７は、稼働残り時間Ｈpdaと稼働残り時間Ｈpcとを比較する。
ＰＤＡ２の電源制御部２７は、コンピュータ４の稼働残り時間ＨpcがＰＤＡ２の稼働残り時間Ｈpdaよりも長ければ、電池２１への充電を行い、稼働残り時間Ｈpcが稼働残り時間Ｈpda以下であれば、電池２１への充電を停止する。 The power supply control unit 27 of the PDA 2 compares the remaining operation time Hpda with the remaining operation time Hpc.
The power supply control unit 27 of the PDA 2 charges the battery 21 if the remaining operation time Hpc of the computer 4 is longer than the remaining operation time Hpda of the PDA 2, and if the remaining operation time Hpc is less than the remaining operation time Hpda, the battery 21 stops charging.

以上説明したように、本実施形態２によれば、電子端末として、ＰＤＡ２とコンピュータ４が用いられ、スレーブとしてのＰＤＡ２の電源制御部２７は、ＰＤＡ２の稼働残り時間Ｈpdaとコンピュータ４の稼働残り時間Ｈpcとに基づいて充電制御を行うようにした。従って、コンピュータ４とＰＤＡ２とは、ＵＳＢケーブル３’を介して電池２１の充電制御を行うことができる。   As described above, according to the second embodiment, the PDA 2 and the computer 4 are used as electronic terminals, and the power supply control unit 27 of the PDA 2 as a slave uses the remaining operation time Hpda of the PDA 2 and the remaining operation time of the computer 4. Charging control is performed based on Hpc. Therefore, the computer 4 and the PDA 2 can control the charging of the battery 21 via the USB cable 3 ′.

（実施形態３）
実施形態３のものは、電流供給側電子端末の稼働残り時間と電流被供給側電子端末の稼働残り時間との比較結果に基づいて充電電流を増減するようにしたものである。 (Embodiment 3)
In the third embodiment, the charging current is increased or decreased based on the comparison result between the remaining operation time of the current supply side electronic terminal and the remaining operation time of the current supplied side electronic terminal.

実施形態３では、実施形態２と同様に、電子端末として、ＰＤＡ２とコンピュータ４とが用いられた例について説明する。ＰＤＡ２は、実施形態１と同様、図２に示すような構成を有する。コンピュータ４は、実施形態２と同様、図５に示すような構成を有する。   In the third embodiment, as in the second embodiment, an example in which the PDA 2 and the computer 4 are used as electronic terminals will be described. Similar to the first embodiment, the PDA 2 has a configuration as shown in FIG. Similar to the second embodiment, the computer 4 has a configuration as shown in FIG.

実施形態３のＰＤＡ２の電源制御部２７は、充電モードとして、急速充電モード又は普通充電モーで電池２１への充電が可能となるように構成されている。   The power supply control unit 27 of the PDA 2 according to the third embodiment is configured so that the battery 21 can be charged in the quick charge mode or the normal charge mode as the charge mode.

普通充電モードは、通常の電流供給量で電池２１を充電するモードである。急速充電モードは、マスタから供給される電流量を、普通充電モード時よりも増やして速やかに電池２１を充電するモードである。   The normal charging mode is a mode in which the battery 21 is charged with a normal current supply amount. The quick charge mode is a mode in which the battery 21 is charged quickly by increasing the amount of current supplied from the master as compared with the normal charge mode.

ＰＤＡ２の電源制御部２７は、実施形態２と同様にコンピュータ４の稼働残り時間ＨpcとＰＤＡ２の稼働残り時間Ｈpdaとを比較する。そして、電源制御部２７は、コンピュータ４の稼働残り時間ＨpcがＰＤＡ２の稼働残り時間Ｈpdaよりも長ければ、電池２１への充電を急速充電モードで行う。また、電源制御部２７は、稼働残り時間Ｈpcが稼働残り時間Ｈpda以下であれば、電池２１への充電を普通充電モードで行う。   The power supply control unit 27 of the PDA 2 compares the remaining operation time Hpc of the computer 4 with the remaining operation time Hpda of the PDA 2 as in the second embodiment. If the remaining operation time Hpc of the computer 4 is longer than the remaining operation time Hpda of the PDA 2, the power supply control unit 27 charges the battery 21 in the quick charge mode. Further, when the remaining operation time Hpc is equal to or less than the remaining operation time Hpda, the power supply control unit 27 charges the battery 21 in the normal charge mode.

以上説明したように、実施形態３によれば、稼働残り時間Ｈpcと稼働残り時間Ｈpdaとの比較結果に基づいて、電池２１への充電を、急速充電モード又は普通充電モードで行うようにした。   As described above, according to the third embodiment, the battery 21 is charged in the quick charge mode or the normal charge mode based on the comparison result between the remaining operation time Hpc and the remaining operation time Hpda.

従って、コンピュータ４の稼働残り時間ＨpcがＰＤＡ２の稼働残り時間Ｈpda以下になった場合でも、電池への電流供給量は、零とはならず、電池への充電制御を精度良く行うことができる。   Therefore, even when the remaining operation time Hpc of the computer 4 becomes equal to or less than the remaining operation time Hpda of the PDA 2, the current supply amount to the battery does not become zero, and charging control to the battery can be performed with high accuracy.

（実施形態４）
実施形態４のものは、電流供給側電子端末が、電流供給用電池の電圧レベルに基づいて電流被供給側電子端末の電池への充電を制御できるようにしたものである。 (Embodiment 4)
In the fourth embodiment, the current supply side electronic terminal can control charging of the battery of the current supply side electronic terminal based on the voltage level of the current supply battery.

実施形態４では、図６に示すように、電子端末として、携帯電話機１とデジタルカメラ５とが用いられた例について説明する。   In the fourth embodiment, an example in which a mobile phone 1 and a digital camera 5 are used as electronic terminals as shown in FIG. 6 will be described.

デジタルカメラ５は、ＵＳＢ−ＯＴＧケーブル３と接続されるためのコネクタ５ｃを備える。実施形態４では、デジタルカメラ５をマスタ、携帯電話機１をスレーブとして用いるものとして、デジタルカメラ５のコネクタ５ｃ、携帯電話機１のコネクタ１ｃに、それぞれ、ＵＳＢ−ＯＴＧケーブル３のＡプラグ３Ａ、Ｂプラグ３Ｂが接続される。   The digital camera 5 includes a connector 5 c for connecting to the USB-OTG cable 3. In the fourth embodiment, assuming that the digital camera 5 is used as a master and the mobile phone 1 is used as a slave, the A plug 3A and B plug of the USB-OTG cable 3 are respectively connected to the connector 5c of the digital camera 5 and the connector 1c of the mobile phone 1. 3B is connected.

実施形態４に係るデジタルカメラ５は、図７に示すように、電池５１と、残量検知部５２と、メモリ５３と、表示部５４と、操作部５５と、送受信部５６と、電源制御部５７と、を備える。   As illustrated in FIG. 7, the digital camera 5 according to the fourth embodiment includes a battery 51, a remaining amount detection unit 52, a memory 53, a display unit 54, an operation unit 55, a transmission / reception unit 56, and a power control unit. 57.

電池５１、残量検知部５２、メモリ５３、表示部５４、操作部５５、送受信部５６、電源制御部５７は、それぞれ、図２に示す携帯電話機１の電池１１、残量検知部１２、メモリ１３、表示部１４、操作部１５、送受信部１６、電源制御部１７と同様の機能を有する。   The battery 51, the remaining amount detection unit 52, the memory 53, the display unit 54, the operation unit 55, the transmission / reception unit 56, and the power supply control unit 57 are respectively the battery 11, the remaining amount detection unit 12, and the memory of the mobile phone 1 shown in FIG. 13, the display unit 14, the operation unit 15, the transmission / reception unit 16, and the power supply control unit 17 have the same functions.

電源制御部５７は、電池５１の電圧レベルと、この電圧レベルに対して予め設定された閾値と、を比較して、比較結果に基づいて、デジタルカメラ５の電池５１の電池残量情報の送信を制御する。この閾値は、電池５１の電圧レベルに基づいて、電池５１の電池残量情報の送信を制御できるように予め設定されたものであり、メモリ５３は、この閾値を予め記憶する。   The power supply control unit 57 compares the voltage level of the battery 51 with a threshold value set in advance for this voltage level, and transmits the remaining battery level information of the battery 51 of the digital camera 5 based on the comparison result. To control. This threshold value is set in advance so that transmission of the battery remaining amount information of the battery 51 can be controlled based on the voltage level of the battery 51, and the memory 53 stores this threshold value in advance.

電源制御部５７は、電池５１の電圧レベルが予め設定された閾値を越えている場合、携帯電話機１からの電池残量情報の送信要求があれば、要求のあった電池５１の電池残量情報を携帯電話機１に送信する。   When the voltage level of the battery 51 exceeds a preset threshold, if there is a request for transmission of the battery remaining amount information from the mobile phone 1, the power supply control unit 57 determines the battery remaining amount information of the requested battery 51. Is transmitted to the mobile phone 1.

一方、電源制御部５７は、電池５１の電圧レベルが予め設定された閾値以下の場合、携帯電話機１からの電池残量情報の送信要求があると、充電不可であることを携帯電話機１に通知する。   On the other hand, when the voltage level of the battery 51 is equal to or lower than a preset threshold value, the power supply control unit 57 notifies the mobile phone 1 that charging is not possible when there is a request to send remaining battery information from the mobile phone 1. To do.

次に、実施形態４に係る携帯電話機１とデジタルカメラ５との動作を説明する。
携帯電話機１とデジタルカメラ５とは、図８に示すフローチャートに従って、充電制御処理を実行する。 Next, operations of the mobile phone 1 and the digital camera 5 according to the fourth embodiment will be described.
The mobile phone 1 and the digital camera 5 execute the charging control process according to the flowchart shown in FIG.

携帯電話機１の電源制御部１７は、デジタルカメラ５に電池５１の電池残量情報の送信を要求し（ステップＳ１２）、デジタルカメラ５の電源制御部５７は、電池５１の電池残量情報の送信要求を受信する（ステップＳ１３）。   The power control unit 17 of the mobile phone 1 requests the digital camera 5 to transmit the remaining battery level information of the battery 51 (step S12), and the power control unit 57 of the digital camera 5 transmits the remaining battery level information of the battery 51. A request is received (step S13).

電源制御部５７は、電池５１の電圧レベルが閾値を越えているか否かを判定する（ステップＳ３１）。   The power supply control unit 57 determines whether or not the voltage level of the battery 51 exceeds the threshold value (step S31).

電池５１の電圧レベルが閾値を越えていると判定した場合（ステップＳ３１においてＹｅｓ）、電源制御部５７は、電池５１の電池残量情報をメモリ５３から読み出して、携帯電話機１に送信する（ステップＳ１４，Ｓ１５）。   When it is determined that the voltage level of the battery 51 exceeds the threshold (Yes in step S31), the power supply control unit 57 reads out the remaining battery information of the battery 51 from the memory 53 and transmits it to the mobile phone 1 (step S31). S14, S15).

電池５１の電圧レベルが閾値以下と判定した場合（ステップＳ３１においてＮｏ）、電源制御部５７は、充電不可を携帯電話機１に通知する（ステップＳ３２）。   When it is determined that the voltage level of the battery 51 is equal to or lower than the threshold (No in Step S31), the power supply control unit 57 notifies the mobile phone 1 that charging is impossible (Step S32).

携帯電話機１の電源制御部１７は、デジタルカメラ５から充電不可の通知があったか否かを判定する（ステップＳ３３）。   The power supply control unit 17 of the mobile phone 1 determines whether or not the digital camera 5 has notified that charging is not possible (step S33).

デジタルカメラ５から充電不可の通知があったと判定した場合（ステップＳ３３においてＹｅｓ）、電源制御部１７は、電池１１への充電を停止する（ステップＳ２０）。   If it is determined that there is a notification that charging is not possible from the digital camera 5 (Yes in step S33), the power supply control unit 17 stops charging the battery 11 (step S20).

デジタルカメラ５から充電不可の通知がなかったと判定した場合（ステップＳ３３においてＮｏ）、電源制御部１７は、デジタルカメラ５からの電池残量情報を受信して、実施形態１と同様に、電池１１への充電制御を行う（ステップＳ１６〜Ｓ２０）。   When it is determined that there is no notification that charging is not possible from the digital camera 5 (No in step S33), the power supply control unit 17 receives battery remaining amount information from the digital camera 5 and, similarly to the first embodiment, the battery 11 The charging control is performed (steps S16 to S20).

以上説明したように、実施形態４によれば、マスタとしてのデジタルカメラ５の電源制御部５７は、電池５１の電圧レベルと予め設定された閾値とを比較して、電池５１の電圧レベルが閾値以下の場合、スレーブとしての携帯電話機１に充電不可を通知するようにした。従って、携帯電話機１の電池１１への充電制御をマスタ側でも行うことができる。   As described above, according to the fourth embodiment, the power control unit 57 of the digital camera 5 as the master compares the voltage level of the battery 51 with a preset threshold value, and the voltage level of the battery 51 is the threshold value. In the following cases, the mobile phone 1 as a slave is notified that charging is not possible. Therefore, charging control to the battery 11 of the mobile phone 1 can be performed also on the master side.

（実施形態５）
実施形態５のものは、電流供給側電子端末が電流被供給側電子端末の電池への充電を制御するための充電スイッチを備えるようにしたものである。 (Embodiment 5)
In the fifth embodiment, the current supply side electronic terminal includes a charge switch for controlling charging of the battery of the current supplied side electronic terminal.

実施形態５では、実施形態４と同様、図６に示すように、電子端末として、携帯電話機１とデジタルカメラ５とが用いられた例について説明する。   In the fifth embodiment, as in the fourth embodiment, an example in which the mobile phone 1 and the digital camera 5 are used as electronic terminals as shown in FIG. 6 will be described.

実施形態５に係るデジタルカメラ５は、操作部５５に充電スイッチ（図示せず）を備える。充電スイッチは、携帯電話機１の電池１１の充電制御を指示するためのものであり、ユーザによって操作される。   The digital camera 5 according to the fifth embodiment includes a charging switch (not shown) in the operation unit 55. The charge switch is for instructing charge control of the battery 11 of the mobile phone 1 and is operated by the user.

電源制御部５７は、充電スイッチの開閉状態に基づいて、電池１１への充電を制御する。このため、電源制御部５７は、充電スイッチが押下されたか否かの操作情報を操作部５５から取得する。充電スイッチが押下されている場合、携帯電話機１からの電池残量情報の送信要求があれば、要求のあった電池５１の電池残量情報を携帯電話機１に送信する。   The power supply control unit 57 controls the charging of the battery 11 based on the open / close state of the charging switch. For this reason, the power supply control unit 57 acquires operation information indicating whether or not the charging switch has been pressed from the operation unit 55. When the charge switch is pressed, if there is a request for transmission of the remaining battery information from the mobile phone 1, the remaining battery information of the requested battery 51 is transmitted to the mobile phone 1.

一方、電源制御部５７は、充電スイッチが押下されていなければ、実施形態４と同様、携帯電話機１に充電不可を通知する。携帯電話機１の電源制御部１７は、充電不可の通知があれば、電池１１への充電を停止する。   On the other hand, if the charging switch is not pressed, the power supply control unit 57 notifies the mobile phone 1 that charging cannot be performed, as in the fourth embodiment. The power supply control unit 17 of the mobile phone 1 stops charging the battery 11 if there is a notification that charging is not possible.

以上説明したように、実施形態５によれば、マスタとしてのデジタルカメラ５に、充電を許可するための充電スイッチを備えるようにした。従って、マスタ側から、ユーザの操作に従って、スレーブの電池の充電制御を行うことができる。   As described above, according to the fifth embodiment, the digital camera 5 as a master is provided with a charge switch for permitting charging. Therefore, the charging control of the slave battery can be performed from the master side according to the user's operation.

尚、本発明を実施するにあたっては、種々の形態が考えられ、上記実施形態に限られるものではない。
例えば、上記実施形態１〜３では、スレーブ側の電源制御部が電池への充電を制御するようにした。しかし、マスタ側の電源制御部が、マスタ側の電池の電池残量とスレーブ側の電池の電池残量との比較結果に基づいてスレーブ側の電池への充電を制御することもできる。 In carrying out the present invention, various forms are conceivable and the present invention is not limited to the above embodiment.
For example, in the first to third embodiments, the power control unit on the slave side controls the charging of the battery. However, the master-side power control unit can also control charging of the slave-side battery based on the comparison result between the remaining battery level of the master-side battery and the remaining battery level of the slave-side battery.

上記実施形態１〜４では、２つの電子端末を接続した場合を例として説明した。しかし、電子端末は、必ずしも２つとは限らず、コネクタは増えるものの、３つ以上であってもよく、３つ以上の電子端末間で上記実施形態１〜４と同じように充電制御を行うこともできる。   In the first to fourth embodiments, the case where two electronic terminals are connected has been described as an example. However, the number of electronic terminals is not necessarily two and the number of connectors is increased, but three or more electronic terminals may be used, and charging control is performed between the three or more electronic terminals as in the first to fourth embodiments. You can also.

上記実施形態１〜４では、電子端末として、携帯電話機１、ＰＤＡ２、コンピュータ、デジタルカメラについて説明した。しかし、電子端末は、これらのものに限られるものではなく、例えば、ＭＰ３プレーヤ、ＣＤ（Compact Disk）、ＭＤ（Mini Disc〜商標）、ＭＯ（Magneto-Optic）、ＤＶＤ（Digital Versatile Disk）等の各種ドライブ装置、携帯ラジオであって、充電用電池を備えたものであってもよい。   In the first to fourth embodiments, the mobile phone 1, the PDA 2, the computer, and the digital camera have been described as the electronic terminals. However, the electronic terminal is not limited to these devices, and examples thereof include an MP3 player, a CD (Compact Disk), an MD (Mini Disc to trademark), an MO (Magneto-Optic), a DVD (Digital Versatile Disk), and the like. Various drive devices and portable radios that include a charging battery may be used.

本発明の実施形態１に係る携帯電話機とＰＤＡとのシステム構成を示す説明図である。It is explanatory drawing which shows the system configuration | structure of the mobile telephone and PDA which concern on Embodiment 1 of this invention. 図１に示す携帯電話機とＰＤＡとの構成を示すブロック図である。It is a block diagram which shows the structure of the mobile telephone and PDA which are shown in FIG. 図１に示す携帯電話機とＰＤＡとの充電制御処理の内容を示すフローチャートである。It is a flowchart which shows the content of the charge control process of the mobile telephone and PDA which are shown in FIG. 本発明の実施形態２に係るＰＤＡとコンピュータとのシステム構成を示す説明図である。It is explanatory drawing which shows the system configuration | structure of PDA and computer which concern on Embodiment 2 of this invention. 図４に示すコンピュータの構成を示すブロック図である。It is a block diagram which shows the structure of the computer shown in FIG. 本発明の実施形態４に係る携帯電話機とデジタルカメラとのシステム構成を示す説明図である。It is explanatory drawing which shows the system configuration | structure of the mobile telephone and digital camera which concern on Embodiment 4 of this invention. 図６に示すデジタルカメラの構成を示すブロック図である。It is a block diagram which shows the structure of the digital camera shown in FIG. 本発明の実施形態４に係る携帯電話機とデジタルカメラとが実行する充電制御処理の内容を示すフローチャートである。It is a flowchart which shows the content of the charge control process which the mobile telephone and digital camera which concern on Embodiment 4 of this invention perform.

符号の説明Explanation of symbols

１・・・携帯電話機、２・・・ＰＤＡ、３・・・ＵＳＢ−ＯＴＧケーブル、４・・・コンピュータ、５・・・デジタルカメラ、１１、２１、３１、４１、５１・・・電池、１２，２２，３２，４２，５２・・・残量検知部、１７，２７，３７，４７，５７・・・電源制御部   DESCRIPTION OF SYMBOLS 1 ... Mobile phone, 2 ... PDA, 3 ... USB-OTG cable, 4 ... Computer, 5 ... Digital camera, 11, 21, 31, 41, 51 ... Battery, 12 , 22, 32, 42, 52... Remaining amount detection unit, 17, 27, 37, 47, 57.

Claims (9)

電流供給側電子端末の電流供給用電池から電流被供給側電子端末の充電用電池への充電制御を行う電子端末の充電制御装置において、
前記充電用電池の残容量に関する電池残量情報を取得する第１の電池残量情報取得部と、
前記電流供給用電池の残容量に関する電池残量情報を取得する第２の電池残量情報取得部と、
前記第１の電池残量取得部が取得した電池残量情報と前記第２の電池残量情報取得部が取得した電池残量情報とを参照し、参照した電池残量情報に基づいて、前記充電用電池への充電を制御する充電制御部と、を備えた、
ことを特徴とする電子端末の充電制御装置。 In the charging control device of the electronic terminal that performs charging control from the current supply battery of the current supply side electronic terminal to the charging battery of the current supply side electronic terminal,
A first battery level information acquisition unit for acquiring battery level information related to the remaining capacity of the charging battery;
A second battery remaining amount information acquisition unit for acquiring remaining battery amount information related to the remaining capacity of the current supply battery;
Refer to the remaining battery level information acquired by the first remaining battery level acquisition unit and the remaining battery level information acquired by the second remaining battery level information acquisition unit, and based on the referenced remaining battery level information, A charge control unit for controlling charging to the charging battery,
A charge control device for an electronic terminal. 前記充電制御部は、参照した電池残量情報に基づいて、前記電流供給用電池の電池残量と前記充電用電池の電池残量とを比較して、その大小を判定し、前記電流供給用電池の電池残量が前記充電用電池の電池残量を越えていると判定した場合は、前記充電用電池への充電を行い、前記電流供給用電池の電池残量が前記充電用電池の電池残量以下と判定した場合は、前記充電を停止する、
ことを特徴とする請求項１に記載の電子端末の充電制御装置。 The charging control unit compares the remaining battery level of the current supply battery with the remaining battery level of the charging battery based on the referenced remaining battery level information, determines the magnitude thereof, and determines the current supply level. When it is determined that the remaining battery level of the battery exceeds the remaining battery level of the charging battery, charging is performed on the charging battery, and the remaining battery level of the current supply battery is equal to that of the charging battery. If it is determined that the battery is less than the remaining amount, the charging is stopped.
The charging control apparatus for an electronic terminal according to claim 1. 前記充電制御部は、参照した電池残量情報に基づいて、前記電流供給用電池の電池残量と前記充電用電池の電池残量とを比較して、その大小を判定し、前記電流供給用電池の電池残量が前記充電用電池の電池残量以下と判定した場合、前記電流供給用電池の電池残量が前記充電用電池の電池残量を越えていると判定した場合よりも充電電流が少なくなるように、前記充電用電池への充電電流を制御する、
ことを特徴とする請求項１に記載の電子端末の充電制御装置。 The charging control unit compares the remaining battery level of the current supply battery with the remaining battery level of the charging battery based on the referenced remaining battery level information, determines the magnitude thereof, and determines the current supply level. When it is determined that the remaining battery level of the battery is less than or equal to the remaining battery level of the charging battery, the charging current is greater than when it is determined that the remaining battery level of the current supply battery exceeds the remaining battery level of the charging battery. The charging current to the charging battery is controlled so that the
The charging control apparatus for an electronic terminal according to claim 1. 前記第１の電池残量情報取得部は、前記電池残量情報として、前記充電用電池の満充電時の全電池容量と現在残っている現存電池容量とを取得し、
前記第２の電池残量情報取得部は、前記電池残量情報として、前記電流供給用電池の満充電時の全電池容量と現在残っている現存電池容量とを取得し、
前記充電制御部は、前記第１の電池残量取得部が取得した電池残量情報と前記第２の電池残量情報取得部が取得した電池残量情報とを参照し、参照した電池残量情報に基づいて、前記充電用電池の前記全電池容量と前記現存電池容量との比、前記電流供給用電池の前記全電池容量と前記現存電池容量との比をそれぞれ求め、求めた前記充電用電池の比、前記電流供給用電池の比を、それぞれ、前記充電用電池の電池残量率、電流供給用電池の電池残量率として両電池残量率を比較し、比較結果に基づいて、前記充電用電池への充電を制御する、
ことを特徴とする請求項１乃至３のいずれか１項に記載の電子端末の充電制御装置。 The first battery remaining amount information acquisition unit acquires, as the battery remaining amount information, the total battery capacity at the time of full charging of the charging battery and the existing remaining battery capacity,
The second battery remaining amount information acquisition unit acquires, as the battery remaining amount information, the total battery capacity when the current supply battery is fully charged and the existing remaining battery capacity,
The charging control unit refers to the remaining battery level information acquired by the first remaining battery level acquisition unit and the remaining battery level information acquired by the second remaining battery level information acquisition unit, and refers to the remaining battery level Based on the information, the ratio of the total battery capacity of the charging battery to the existing battery capacity, the ratio of the total battery capacity of the current supply battery to the existing battery capacity, respectively, and the obtained charging The battery ratio, the ratio of the battery for current supply, the remaining battery ratio of the battery for charging, the remaining battery ratio of the battery for current supply are compared with each other, based on the comparison result, Controlling charging of the charging battery;
The charging control device for an electronic terminal according to claim 1, wherein the charging control device is an electronic terminal charging control device. 前記第１の電池残量情報取得部は、前記電池残量情報として、前記電流被供給側電子端末の消費電流と前記充電用電池の現在残っている現存電池容量とを取得して前記電流被供給側電子端末の稼働可能な稼働残り時間を求め、
前記第２の電池残量情報取得部は、前記電池残量情報として、前記電流供給側電子端末の消費電流と前記電流供給用電池の現在残っている現存電池容量とを取得して前記電流供給側電子端末の稼働可能な稼働残り時間を求め、
前記充電制御部は、両稼働残り時間を比較し、比較結果に基づいて、前記充電用電池への充電を制御する、
ことを特徴とする請求項１乃至３のいずれか１項に記載の電子端末の充電制御装置。 The first battery remaining amount information acquiring unit acquires the current consumption of the current supplied electronic terminal and the current remaining battery capacity of the charging battery as the battery remaining amount information, and acquires the current covered amount. Find the remaining working time of the supply side electronic terminal,
The second battery remaining amount information acquisition unit acquires the current consumption of the current supply side electronic terminal and the current remaining battery capacity of the current supply battery as the battery remaining amount information, and supplies the current. The remaining working time of the electronic terminal
The charge control unit compares both remaining operating times, and controls charging to the charging battery based on the comparison result.
The charging control device for an electronic terminal according to claim 1, wherein the charging control device is an electronic terminal charging control device. 電流供給側電子端末の電流供給用電池から電流被供給側電子端末の充電用電池への充電制御を行う電子端末の充電制御装置において、
前記電流供給側電子端末は、前記充電用電池への充電を制御する充電制御部を備えた、
ことを特徴とする電子端末の充電制御装置。 In the charging control device of the electronic terminal that performs charging control from the current supply battery of the current supply side electronic terminal to the charging battery of the current supply side electronic terminal,
The current supply side electronic terminal includes a charge control unit that controls charging of the charging battery.
A charge control device for an electronic terminal. 前記充電制御部は、前記電流供給用電池の電池残量と前記電池残量に対して予め設定された閾値とを比較し、前記電流供給用電池の電池残量が前記閾値を越えている場合、前記充電用電池への充電を許可し、前記電流供給用電池の電池残量が前記閾値以下の場合、前記充電用電池への充電を不可とする、
ことを特徴とする請求項６に記載の電子端末の充電制御装置。 The charge control unit compares the remaining battery level of the current supply battery with a threshold value preset for the remaining battery level, and the remaining battery level of the current supply battery exceeds the threshold value. , Charging to the charging battery is permitted, and when the battery remaining amount of the current supply battery is equal to or less than the threshold, charging to the charging battery is disabled.
The charging control device for an electronic terminal according to claim 6. 前記充電用電池への充電制御を指示する充電スイッチを備え、
前記充電制御部は、前記充電スイッチのスイッチ状態に基づいて、前記充電用電池への充電を制御する、
ことを特徴とする請求項６又は７に記載の電子端末の充電制御装置。 A charge switch for instructing charging control to the charging battery;
The charging control unit controls charging to the charging battery based on a switch state of the charging switch.
The charging control apparatus for an electronic terminal according to claim 6 or 7, 電流供給側電子端末の電流供給用電池から電流被供給側電子端末の充電用電池への充電を制御する電子端末の充電制御方法であって、
前記電流供給用電池の電池残量情報を取得するステップと、
前記充電用電池の電池残量情報を取得するステップと、
取得した電池残量情報を参照し、参照した電池残量情報に基づいて、前記電流供給用電池、前記充電用電池の電池残量の大小を判定するステップと、
前記判定結果に基づいて前記充電用電池への充電を制御するステップと、を備えた、
ことを特徴とする電子端末の充電制御方法。 An electronic terminal charge control method for controlling charging from a current supply battery of a current supply side electronic terminal to a charge battery of a current supply side electronic terminal,
Obtaining battery remaining amount information of the current supply battery;
Obtaining battery remaining amount information of the charging battery;
A step of referring to the acquired battery remaining amount information, and determining the magnitude of the remaining amount of the current supply battery and the charging battery based on the referred battery remaining amount information;
Controlling charging of the charging battery based on the determination result,
A charge control method for an electronic terminal.
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