JP5757564B2 - Portable electronic device, power control method for portable electronic device, and power control program for portable electronic device - Google Patents

Portable electronic device, power control method for portable electronic device, and power control program for portable electronic device Download PDF

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JP5757564B2
JP5757564B2 JP2011113220A JP2011113220A JP5757564B2 JP 5757564 B2 JP5757564 B2 JP 5757564B2 JP 2011113220 A JP2011113220 A JP 2011113220A JP 2011113220 A JP2011113220 A JP 2011113220A JP 5757564 B2 JP5757564 B2 JP 5757564B2
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JP2012244792A (en
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崇之 古川
崇之 古川
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埼玉日本電気株式会社
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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
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Description

本発明は、携帯電子機器、携帯電子機器の電源制御方法、携帯電子機器の電源制御プログラムに関するもので、特に、電池残量が不足している場合の電源制御に係わる。   The present invention relates to a portable electronic device, a power control method for a portable electronic device, and a power control program for a portable electronic device, and particularly relates to power control when a remaining battery level is insufficient.

近年の携帯端末は、機能が増加しており、これに伴い、動作時の消費電流が増加し、ユーザが使用できる時間が低下している。そこで、携帯端末が内蔵する電池残量に応じて、携帯端末が動作できる機能を制限することで、消費電流を低減させ、ユーザが使用できる時間を延長させるものが提案されている。   The functions of portable terminals in recent years have increased, and along with this, current consumption during operation has increased, and the time that can be used by the user has decreased. Thus, there has been proposed a device that reduces the current consumption and extends the time that the user can use by limiting the functions that the portable terminal can operate in accordance with the remaining battery capacity of the portable terminal.

例えば、特許文献１には、電池容量が基準レベル以下のときには、省電力モードに移行し、省電力モードでは、ＬＣＤ表示部の点灯時間を短くする等、機能制限を行い、ユーザが使用できる時間を延長させるようにしたものが記載されている。   For example, in Patent Document 1, when the battery capacity is below the reference level, the mode is shifted to the power saving mode, and in the power saving mode, the time for which the user can use the function is restricted by shortening the lighting time of the LCD display unit. It is described that is extended.

特開２００３−３１９０３６号公報JP 2003-319036 A

しかしながら、上述のように、電池容量が不足している場合に、端末が動作できる機能を制限してしまうと、ユーザが使用したい機能を十分に使用できなくなってしまう。   However, as described above, if the function that the terminal can operate is limited when the battery capacity is insufficient, the function that the user wants to use cannot be sufficiently used.

電池容量が少ない場合には、携帯端末に充電器を装着し、充電が行われる。電池残量が少ない場合でも、このように電池への充電が行なわれていれば、端末に流れる充電電流によって、機器の動作が可能である。   When the battery capacity is low, a charger is attached to the portable terminal and charging is performed. Even when the remaining battery level is low, if the battery is charged in this way, the device can be operated by the charging current flowing through the terminal.

そこで、例えばメカニカルスイッチにより充電器が装着されているかどうかを検出し、充電器が装着されている場合には、電池残量が少ない場合でも、機能制限を行わないようにすることが考えられる。   Therefore, for example, it is conceivable to detect whether or not a charger is attached by a mechanical switch, and when the charger is attached, the function is not restricted even when the remaining battery level is low.

しかしながら、充電器が携帯端末に装着されていたとしても、充電器のモードによっては、充電電流により各部の回路に十分に電流を供給することは難しい場合がある。例えば、充電器には、急速充電モードやトリクル充電モード等のモードがあり、電池残量を維持するためのトリクル充電モードでは、殆ど充電電流は流れない。したがって、単純に、充電器が装着されたかどうかを検出して、機能制限を解除してしまうと、電池残量が不足してしまうことになる。   However, even if the charger is attached to the portable terminal, depending on the mode of the charger, it may be difficult to supply sufficient current to the circuits of each part by the charging current. For example, the charger has modes such as a quick charge mode and a trickle charge mode. In the trickle charge mode for maintaining the remaining battery level, almost no charging current flows. Therefore, if it is simply detected whether the charger is attached and the function restriction is released, the remaining battery level becomes insufficient.

そこでこの発明は、上述の課題を解決することのできる携帯電子機器、携帯電子機器の電源制御方法、携帯電子機器の電源制御プログラムを提供することを目的としている。   Therefore, an object of the present invention is to provide a portable electronic device, a power control method for the portable electronic device, and a power control program for the portable electronic device that can solve the above-described problems.

上述の課題を解決するために、本発明に係る携帯電子機器は、充電可能な電池の残量を検出する電池残量測定手段と、充電器からの充電電流を検出する充電電流測定手段と、前記電池残量測定手段の検出値から得た電池残量が閾値以下であると判定した場合に、更に、前記充電電流測定手段により充電電流を検出し、前記電池残量が閾値以下であり、且つ、前記充電電流がトリクル充電モード状態を示す充電電流の閾値未満である場合には消費電流を抑制するための機能制限を行い、前記電池残量が閾値を超える場合または前記電池残量が閾値以下であって前記充電電流が前記トリクル充電モード状態を示す充電電流の閾値以上である場合には機能制限を行わずに機能制限の判定処理を終了する制御手段とを備えることを特徴とする。 In order to solve the above-described problem, a portable electronic device according to the present invention includes a battery remaining amount measuring unit that detects a remaining amount of a rechargeable battery, a charging current measuring unit that detects a charging current from a charger, When it is determined that the remaining battery level obtained from the detection value of the remaining battery level measuring unit is less than or equal to a threshold , the charging current is further detected by the charging current measuring unit , and the remaining battery level is less than or equal to the threshold. and, if the charging current is less than a threshold of the charging current indicating trickle charge mode state have line function restriction for suppressing the current consumption, or when the battery remaining amount the battery level exceeds a threshold value And control means for ending the function restriction determination process without performing function restriction when the charge current is not more than a threshold value and the charge current is not less than the charge current threshold value indicating the trickle charge mode state. To do.

本発明に係る携帯電子機器の電源制御方法は、電池残量測定手段が、充電可能な電池の残量を検出し、充電電流測定手段が、充電器からの充電電流を検出し、制御手段が、前記電池残量測定手段の検出値から得た電池残量が閾値以下であると判定した場合に、更に、前記充電電流測定手段により充電電流を検出し、前記電池残量が閾値以下であり、且つ、前記充電電流がトリクル充電モード状態を示す充電電流の閾値未満である場合には消費電流を抑制するための機能制限を行い、前記電池残量が閾値を超える場合または前記電池残量が閾値以下であって前記充電電流が前記トリクル充電モード状態を示す充電電流の閾値以上である場合には機能制限を行わずに機能制限の判定処理を終了することを特徴とする。 According to the power control method for a portable electronic device according to the present invention, the battery remaining amount measuring unit detects the remaining amount of the rechargeable battery, the charging current measuring unit detects the charging current from the charger, and the control unit includes , When it is determined that the remaining battery level obtained from the detection value of the remaining battery level measuring unit is less than or equal to a threshold value, the charging current is further detected by the charging current measuring unit, and the remaining battery level is less than or equal to the threshold value. And when the charging current is less than the threshold value of the charging current indicating the trickle charging mode state, a function restriction for suppressing current consumption is performed, and when the remaining battery level exceeds the threshold value or the remaining battery level is When the charging current is equal to or less than a threshold and the charging current is equal to or more than a threshold of charging current indicating the trickle charge mode state, the function restriction determination process is terminated without performing the function restriction .

本発明に係る携帯電子機器の電源制御プログラムは、充電可能な電池の残量を検出する電池残量測定手段、充電器からの充電電流を検出する充電電流測定手段、前記電池残量測定手段の検出値から得た電池残量が閾値以下であると判定した場合に、更に、前記充電電流測定手段により充電電流を検出し、前記電池残量が閾値以下であり、且つ、前記充電電流がトリクル充電モード状態を示す充電電流の閾値未満である場合には消費電流を抑制するための機能制限を行い、前記電池残量が閾値を超える場合または前記電池残量が閾値以下であって前記充電電流が前記トリクル充電モード状態を示す充電電流の閾値以上である場合には機能制限を行わずに機能制限の判定処理を終了する制御手段、としてコンピュータを機能させる。 A power control program for a portable electronic device according to the present invention includes: a remaining battery level measuring unit that detects a remaining battery level; a charging current measuring unit that detects a charging current from a charger; and the remaining battery level measuring unit. When it is determined that the remaining battery level obtained from the detection value is less than or equal to a threshold value , the charging current is further detected by the charging current measuring means, the remaining battery level is less than or equal to the threshold value , and the charging current is If it is less than the threshold of the charging current indicating trickle charge mode state have line function restriction for suppressing the current consumption, the case or the battery remaining amount the battery level exceeds a threshold value is equal to or less than the threshold value When the charging current is equal to or greater than the threshold value of the charging current indicating the trickle charging mode state , the computer is caused to function as control means for terminating the function restriction determination process without performing the function restriction .

本発明によれば、充電器からの充電電流を検出する充電電流測定回路が設けられており、電池残量が少ない場合でも、外部から十分な充電電流があれば、機器の動作を可能とし、携帯端末の機能を十分に利用することができ、充電電流が少ない場合は、携帯端末の機能を制限することで消費電流を抑えて、端末を使用できる時間を延長することができる。   According to the present invention, a charging current measuring circuit for detecting a charging current from a charger is provided, and even when the remaining battery level is low, if there is a sufficient charging current from the outside, the device can be operated, When the function of the mobile terminal can be fully utilized and the charging current is small, the current consumption can be suppressed by limiting the function of the mobile terminal and the time during which the terminal can be used can be extended.

本発明の第１の実施形態に係る携帯電子機器としての携帯端末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 portable terminal as a portable electronic device which concerns on the 1st Embodiment of this invention. 電源部の構成を示すブロック図である。It is a block diagram which shows the structure of a power supply part. 電源部の処理を示すフローチャートである。It is a flowchart which shows the process of a power supply part.

以下、本発明の実施の形態について図面を参照しながら説明する。図１は、本発明の第１の実施形態に係る携帯電子機器としての携帯端末１の構成を示すブロック図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a mobile terminal 1 as a mobile electronic device according to the first embodiment of the present invention.

図１において、制御部１０１は、ＣＰＵ(Central Processing Unit)等からなり、携帯端末１の全体の動作の制御を行っている。ＲＯＭ(Read Only Memory)１０２には、ブートプログラム、基本プログラムが保存されている。フラッシュメモリ１０３には、各種のプリセットデータ、写真情報等、各種の保存データ、各種のアプリケーションプログラムが記憶される。ＲＡＭ(Random Access Memory)１０４は、データ処理用のメモリである。   In FIG. 1, a control unit 101 includes a CPU (Central Processing Unit) and the like, and controls the overall operation of the mobile terminal 1. A ROM (Read Only Memory) 102 stores a boot program and a basic program. The flash memory 103 stores various preset data, various saved data such as photo information, and various application programs. A RAM (Random Access Memory) 104 is a memory for data processing.

操作部１０６は、ユーザからの入力操作を行う。操作部１０６には、テンキーや、カーソルキー、決定キー等が含まれる。表示部１０８は、ＬＣＤ(Liquid Crystal Display)やＥＬ(Electro Luminescence)ディスプレイからなり、各種の文字や画像を表示する。   The operation unit 106 performs an input operation from the user. The operation unit 106 includes a numeric keypad, a cursor key, an enter key, and the like. The display unit 108 includes an LCD (Liquid Crystal Display) or an EL (Electro Luminescence) display, and displays various characters and images.

通信制御部１０９は、基地局との間で、電波の送受信や、データの変復調、送受信するデータのエラー訂正処理、パケット化処理等を行っている。通信方式としては、ＰＤＣ(Personal Digital Cellular)、ＧＳＭ(Global System for Mobile Communication)、ＣＤＭＡ(Code Division Multiple Access)２０００、ＷＣＤＭＡ(Wideband CDMA)、ＬＴＥ（Long Term Evolution）等がある。本発明では、どのような通信方式を用いても良い。   The communication control unit 109 performs transmission / reception of radio waves, modulation / demodulation of data, error correction processing of data to be transmitted / received, packetization processing, and the like with a base station. Communication systems include PDC (Personal Digital Cellular), GSM (Global System for Mobile Communication), CDMA (Code Division Multiple Access) 2000, WCDMA (Wideband CDMA), LTE (Long Term Evolution), and the like. In the present invention, any communication method may be used.

マイクロホン１１０及びスピーカ１１１は、電話利用時に、送受話を行う場合等に用いられる。音声処理部１１２は、コーデックを含み、入力音声信号や出力音声信号の処理を行っている。   The microphone 110 and the speaker 111 are used when transmitting and receiving a telephone call. The audio processing unit 112 includes a codec, and processes input audio signals and output audio signals.

カメラ部１１３は、ＣＣＤ(Charge Coupled Device)やＣＭＯＳ(Complementary MOS)等のイメージセンサからなる。カメラ部１１３は、人物や風景を撮影したりするのに利用される他、ＱＲコードによるデータ入力等に利用される。   The camera unit 113 includes an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary MOS). The camera unit 113 is used not only for photographing a person or landscape, but also for data input using a QR code.

ワンセグ受信部１１４は、ワンセグ放送（地上波ディジタルテレビジョン放送のＯＦＤＭ(Orthogonal Frequency Division Multiplex)フレームの１フレームを使って行うテレビジョン放送）の受信処理を行う。近距離通信部１１５は、他の周辺機器との無線で接続してデータの送受信を行う。通信方式としては、例えば、Ｂｌｕｅｔｏｏｔｈ（登録商標）が用いられる。   The one-seg receiving unit 114 performs reception processing for one-seg broadcasting (television broadcasting performed using one frame of OFDM (Orthogonal Frequency Division Multiplex) of terrestrial digital television broadcasting). The short-range communication unit 115 transmits and receives data by connecting wirelessly with other peripheral devices. As a communication method, for example, Bluetooth (registered trademark) is used.

ＧＰＳ(Global Positioning System)機能部１１６は、複数の衛星からの電波を受信して、現在地を測位する。電子マネー処理部１１７は、ＲＦＩＤ（Radio Frequency IDentification）リーダを含む処理部であり、非接触で電子マネー情報をやり取りすることで、電子マネーの処理を行う。   A GPS (Global Positioning System) function unit 116 receives radio waves from a plurality of satellites and measures the current location. The electronic money processing unit 117 is a processing unit including an RFID (Radio Frequency IDentification) reader, and processes electronic money by exchanging electronic money information without contact.

電源部１２０は、携帯端末１の各部に電源を供給する。本発明の第１の実施形態においては、電源部１２０は、電池残量が不足し、且つ、充電電流が閾値未満の場合にのみ、消費電流を抑制するための機能制限を行う。このことについては、後に説明する。   The power supply unit 120 supplies power to each unit of the mobile terminal 1. In the first embodiment of the present invention, the power supply unit 120 performs function restriction for suppressing current consumption only when the remaining battery level is insufficient and the charging current is less than the threshold value. This will be described later.

図２は、電源部１２０の構成を示すブロック図である。図２において、電源駆動回路２０１は、電池２０５からの電源から各部に必要な電源を生成し、各部の回路に供給する。電池２０５は、携帯端末１に内蔵されている充電可能な電池であり、電池２０５としては、ニッケル・カドミウム電池、ニッケル・水素電池、リチウム・ポリマー電池、リチウム・イオン電池等が用いられる。   FIG. 2 is a block diagram illustrating a configuration of the power supply unit 120. In FIG. 2, the power supply driving circuit 201 generates power necessary for each unit from the power supplied from the battery 205 and supplies the generated power to each unit circuit. The battery 205 is a rechargeable battery built in the mobile terminal 1. As the battery 205, a nickel / cadmium battery, a nickel / hydrogen battery, a lithium polymer battery, a lithium ion battery, or the like is used.

電池残量測定回路２０２は、電池２０５の残量を計測する。制御部１０１は、電池残量測定回路２０２の検出出力から、電池２０５の残量を判定する。ここで、制御部１０１は、電池残量が低下した場合には、機能２１０ａ、２１０ｂ、…の使用を制限することで、消費電流を低減させ、ユーザが使用できる時間を延長させることができる。機能２１０ａ、機能２１０ｂ、…の機能制限としては、表示部１０８の点灯時間を短くする或いは表示を暗くする、通信制御部１０９の通信機能の出力や通信頻度を低下させる等の機能制限が考えられる。また、カメラ部１１３によるカメラ機能、ＧＰＳ機能部１１６によるＧＰＳ機能、電子マネー処理部１１７による電子マネー機能、ワンセグ受信部１１４によるワンセグ受信機能等、携帯端末１の補助的な機能に関する使用制限を行うようにしても良い。勿論、消費電流を抑制するための機能制限としては、表示点灯機能の制限、通信機能の制限、補助的な機能に関する使用制限の一部若しくは全ての組み合わせとしても良い。   The battery remaining amount measuring circuit 202 measures the remaining amount of the battery 205. The control unit 101 determines the remaining amount of the battery 205 from the detection output of the remaining battery level measurement circuit 202. Here, when the remaining battery level is reduced, the control unit 101 can limit the use of the functions 210a, 210b,..., Thereby reducing current consumption and extending the time that the user can use. As the function restriction of the functions 210a, 210b,..., Function restrictions such as shortening the lighting time of the display unit 108 or dimming the display, reducing the communication function output of the communication control unit 109, and the communication frequency can be considered. . In addition, use restrictions on auxiliary functions of the mobile terminal 1 such as a camera function by the camera unit 113, a GPS function by the GPS function unit 116, an electronic money function by the electronic money processing unit 117, and a one-segment reception function by the one-segment reception unit 114 are performed. You may do it. Of course, the function restriction for suppressing the current consumption may be a combination of part or all of the restriction on the display lighting function, the restriction on the communication function, and the use restriction on the auxiliary function.

更に、本発明の第１の実施形態においては、外部の充電器２０６からの充電電流を検出する充電電流測定回路２０３が設けられている。充電器２０６が装着されると、充電器２０６により充電電流が電源駆動回路２０１を経由して電池２０５に送られ、電池２０５が充電されると共に、電源駆動回路２０１は、この充電器２０６からの電源から各部に必要な電源を生成し、各部の回路に供給する。充電電流測定回路２０３は、このときの充電電流を検出し、この検出出力を制御部１０１に送る。制御部１０１は、充電電流測定回路２０３の検出出力から、充電器２０６からの充電電流を監視している。   Furthermore, in the first embodiment of the present invention, a charging current measuring circuit 203 that detects the charging current from the external charger 206 is provided. When the charger 206 is attached, a charging current is sent from the charger 206 to the battery 205 via the power supply driving circuit 201, and the battery 205 is charged. A power source required for each unit is generated from the power source and supplied to the circuit of each unit. The charging current measuring circuit 203 detects the charging current at this time, and sends this detection output to the control unit 101. The control unit 101 monitors the charging current from the charger 206 from the detection output of the charging current measuring circuit 203.

上述のように、電池残量が不足している場合であっても、充電器２０６が装着されている場合には、充電器２０６により、各回路に必要な電源を供給できるので、消費電流を抑制するための機能制限を行う必要はない。   As described above, even when the remaining battery level is insufficient, if the charger 206 is attached, the charger 206 can supply the necessary power to each circuit. There is no need to limit the function to suppress it.

そこで、本発明の第１の実施形態においては、制御部１０１は、電池残量測定回路２０２の検出値から電池残量が不足していると判定された場合には、更に、充電電流測定回路２０３により充電電流が閾値未満であるかどうかを判定し、電池残量が不足し、且つ、充電電流が閾値未満の場合のみ、消費電流を抑制するための機能制限を行うようにしている。   Therefore, in the first embodiment of the present invention, when it is determined that the remaining battery level is insufficient from the detection value of the remaining battery level measurement circuit 202, the control unit 101 further includes a charging current measurement circuit. Whether or not the charging current is less than the threshold value is determined in 203, and the function restriction for suppressing the consumption current is performed only when the remaining battery level is insufficient and the charging current is less than the threshold value.

このようにすれば、電池残量が不足していると判定された場合であっても、充電器２０６からの充電電流により各部に十分な電流を送ることができる場合には、消費電流を抑制するための機能制限を解除して、機器の動作を可能とできる。   In this way, even if it is determined that the remaining battery level is insufficient, if the charging current from the charger 206 can send sufficient current to each part, current consumption is suppressed. It is possible to release the function restriction for the operation and enable the operation of the device.

なお、充電器２０６が装着されたかどうか例えばメカニカルスイッチで検出し、充電器２０６が装着された場合には、電池残量が不足していても、機能制限を解除するようにした場合には、充電器２０６が装着されてさえいれば、たとえ充電器２０６がトリクル充電モードになっていても、機能制限は解除されてしまう。このような場合には、各回路に必要な電流が供給できなくなってしまうことになる。   Whether the charger 206 is installed is detected by, for example, a mechanical switch, and when the charger 206 is installed, even if the remaining battery level is insufficient, the function restriction is canceled. As long as the charger 206 is attached, the function restriction is released even if the charger 206 is in the trickle charge mode. In such a case, the current necessary for each circuit cannot be supplied.

これに対して、本発明の第１の実施形態では、充電器２０６が装着されたかどうかではなく、充電電流を検出しているので、充電器２０６が装着されている場合であっても、例えば充電器２０６がトリクル充電モードになっているときには、充電電流測定回路２０３で充電電流は閾値未満であると判定されることになり、機能制限が行われる。このように、本発明の第１の実施形態では、単純に、充電器２０６が装着されたかどうかを検出する場合と異なり、たとえ充電器２０６が装着されていたとしても、充電電流により各部の回路に十分に電流を供給できないとされる充電電流の閾値未満の場合には、消費電流を抑制するための機能制限が必ず行われることになる。   On the other hand, in the first embodiment of the present invention, since the charging current is detected, not whether or not the charger 206 is attached, even when the charger 206 is attached, for example, When the charger 206 is in trickle charging mode, the charging current measuring circuit 203 determines that the charging current is less than the threshold value, and the function is limited. As described above, in the first embodiment of the present invention, unlike the case where it is simply detected whether or not the charger 206 is attached, even if the charger 206 is attached, the circuit of each part is determined by the charging current. If the current is less than the threshold value of the charging current that cannot be sufficiently supplied, the function restriction for suppressing the current consumption is necessarily performed.

図３は、上述の電源部１２０の処理を示すフローチャートである。図３において、制御部１０１は、電池残量測定回路２０２から電池残量を取得し（ステップＳ１）、電池残量が低下したか（例えば、残量閾値以下か）どうかを判定する（ステップＳ２）。電池残量が低下していない場合には（ステップＳ２ Ｎｏ）、制御部１０１は、機能制限を行わずに（ステップＳ３）、処理を終了する。 FIG. 3 is a flowchart showing the processing of the power supply unit 120 described above. In FIG. 3, the control unit 101 acquires the remaining battery level from the remaining battery level measurement circuit 202 (step S1), and determines whether the remaining battery level has decreased (for example, whether the remaining battery level is equal to or lower than the remaining level threshold) (step S2). ). If the remaining battery level has not decreased (No at Step S2), the control unit 101 ends the process without performing function restriction (Step S3).

ステップＳ２で電池残量が低下したと判定された場合には（ステップＳ２ Ｙｅｓ）、制御部１０１は、充電電流測定回路２０３から充電電流を取得し（ステップＳ４）、充電電流が閾値未満かどうかを判定する（ステップＳ５）。ステップＳ５で、充電電流が閾値未満の場合には（ステップＳ５ Ｙｅｓ）、制御部１０１は、機能制限を行って消費電流を削減し（ステップＳ６）、充電電流が閾値未満でない場合には（ステップＳ５ Ｎｏ）、機能制限を行わずに（ステップＳ３）、処理を終了する。なお、制御部１０１は、現在使用している各機能で必要な消費電流量を算出し、その消費電流量に応じて、充電電流の閾値を決定するようにしてもよい。   If it is determined in step S2 that the remaining battery level has decreased (step S2 Yes), the control unit 101 acquires the charging current from the charging current measurement circuit 203 (step S4), and whether the charging current is less than the threshold value. Is determined (step S5). In step S5, when the charging current is less than the threshold (step S5 Yes), the control unit 101 performs function limitation to reduce the current consumption (step S6), and when the charging current is not less than the threshold (step S5). S5 No), without limiting the function (step S3), the process is terminated. The control unit 101 may calculate a current consumption amount necessary for each function currently used, and may determine a charging current threshold according to the current consumption amount.

以上説明したように、本発明の第１の実施形態では、充電器２０６からの充電電流を検出する充電電流測定回路２０３が設けられており、電池残量が少ない場合でも、外部から十分な充電電流があれば、機器の動作を可能とし、携帯端末の機能を十分に利用することができ、充電電流が少ない場合は、携帯端末の機能を制限することで消費電流を抑えて、端末を使用できる時間を延長することができる。   As described above, in the first embodiment of the present invention, the charging current measuring circuit 203 that detects the charging current from the charger 206 is provided, and even when the remaining battery level is low, sufficient charging is performed from the outside. If there is a current, the device can be operated and the functions of the mobile device can be fully used. When the charging current is low, the device can be used by limiting the function of the mobile device to reduce current consumption. You can extend the time you can.

また、本発明の第１の実施形態では、充電電流測定回路２０３で充電器２０６からの充電電流を直接検出している。したがって、単純に、充電器が装着されたかどうかを検出する場合と異なり、例えば充電器２０６がトリクル充電モードで、充電電流により各部の回路に十分に電流を供給できないときに、機能制限が解除され、電池残量が不足してしまうというような動作が行われることはない。   In the first embodiment of the present invention, the charging current measuring circuit 203 directly detects the charging current from the charger 206. Therefore, unlike simply detecting whether or not the charger is installed, the function restriction is released when the charger 206 is in trickle charge mode and the charging current cannot sufficiently supply current to each circuit. The operation that the remaining battery level is insufficient is not performed.

なお、機能を制限する閾値や、各機能ごとの動作制限については、例えば、閾値を複数設け、各閾値と機能の使用頻度とを対応させ、高い閾値の電流ではユーザの使用頻度が低い機能を制限することで、ユーザがよく使用する機能が優先的に動作するようにしても良い。   Regarding thresholds for limiting functions and operation restrictions for each function, for example, a plurality of thresholds are provided, and each threshold is associated with the frequency of use of the function. By limiting, a function frequently used by a user may be preferentially operated.

本発明は、携帯端末に限らず、充電可能な電池で動作する携帯電子機器であれば、どのようなものにも用いることができる。   The present invention is not limited to a portable terminal, and can be used for any portable electronic device that operates on a rechargeable battery.

本発明は、上述した実施形態に限定されるものではなく、この発明の要旨を逸脱しない範囲内で様々な変形や応用が可能である。   The present invention is not limited to the above-described embodiments, and various modifications and applications can be made without departing from the gist of the present invention.

１：携帯端末
１０１：制御部
１０２：ＲＯＭ
１０３：フラッシュメモリ
１０４：ＲＡＭ
１０６：操作部
１０８：表示部
１０９：通信制御部
１１０：マイクロホン
１１１：スピーカ
１１２：音声処理部
１１３：カメラ部
１１４：ワンセグ受信部
１１５：近距離通信部
１１６：ＧＰＳ機能部
１１７：電子マネー処理部
１２０：電源部
２０１：電源駆動回路
２０２：電池残量測定回路
２０３：充電電流測定回路
２０５：電池
２０６：充電器 1: Mobile terminal 101: Control unit 102: ROM
103: Flash memory 104: RAM
106: operation unit 108: display unit 109: communication control unit 110: microphone 111: speaker 112: audio processing unit 113: camera unit 114: one-segment receiving unit 115: short-range communication unit 116: GPS function unit 117: electronic money processing unit 120: Power supply unit 201: Power supply drive circuit 202: Battery remaining amount measurement circuit 203: Charging current measurement circuit 205: Battery 206: Charger

Claims (6)

充電可能な電池の残量を検出する電池残量測定手段と、
充電器からの充電電流を検出する充電電流測定手段と、
前記電池残量測定手段の検出値から得た電池残量が閾値以下であると判定した場合に、更に、前記充電電流測定手段により充電電流を検出し、前記電池残量が閾値以下であり、且つ、前記充電電流がトリクル充電モード状態を示す充電電流の閾値未満である場合には消費電流を抑制するための機能制限を行い、前記電池残量が閾値を超える場合または前記電池残量が閾値以下であって前記充電電流が前記トリクル充電モード状態を示す充電電流の閾値以上である場合には機能制限を行わずに機能制限の判定処理を終了する制御手段と
を備えることを特徴とする携帯電子機器。 A battery level measuring means for detecting the remaining battery level;
Charging current measuring means for detecting a charging current from the charger;
When it is determined that the remaining battery level obtained from the detection value of the remaining battery level measuring unit is less than or equal to a threshold , the charging current is further detected by the charging current measuring unit , and the remaining battery level is less than or equal to the threshold. and, if the charging current is less than a threshold of the charging current indicating trickle charge mode state have line function restriction for suppressing the current consumption, or when the battery remaining amount the battery level exceeds a threshold value Control means for terminating the function restriction determination process without performing function restriction when the charge current is not more than a threshold value and the charge current is not less than the charge current threshold value indicating the trickle charge mode state. Portable electronic devices. 消費電流を抑制するための機能制限は、表示点灯機能の制限、通信機能の制限、補助的な機能に関する使用制限を含むことを特徴とする請求項１に記載の携帯電子機器。   The portable electronic device according to claim 1, wherein the function restriction for suppressing current consumption includes a display lighting function restriction, a communication function restriction, and a usage restriction regarding an auxiliary function. 前記制御手段は、予め閾値を設定し、前記充電電流測定手段により充電電流を前記閾値と比較することを特徴とする請求項１に記載の携帯電子機器。   The portable electronic device according to claim 1, wherein the control unit sets a threshold value in advance and compares the charging current with the threshold value by the charging current measurement unit. 前記閾値を複数設け、各閾値と機能の使用頻度とを対応させて機能制限を行うことを特徴とする請求項３に記載の携帯電子機器。   4. The portable electronic device according to claim 3, wherein a plurality of the threshold values are provided, and the function restriction is performed by associating each threshold value with a function usage frequency. 電池残量測定手段が、充電可能な電池の残量を検出し、
充電電流測定手段が、充電器からの充電電流を検出し、
制御手段が、前記電池残量測定手段の検出値から得た電池残量が閾値以下であると判定した場合に、更に、前記充電電流測定手段により充電電流を検出し、前記電池残量が閾値以下であり、且つ、前記充電電流がトリクル充電モード状態を示す充電電流の閾値未満である場合には消費電流を抑制するための機能制限を行い、前記電池残量が閾値を超える場合または前記電池残量が閾値以下であって前記充電電流が前記トリクル充電モード状態を示す充電電流の閾値以上である場合には機能制限を行わずに機能制限の判定処理を終了する
ことを特徴とする携帯電子機器の電源制御方法。 The battery level measuring means detects the remaining battery level,
The charging current measuring means detects the charging current from the charger,
When the control unit determines that the remaining battery level obtained from the detection value of the remaining battery level measurement unit is equal to or less than a threshold value, the control unit further detects a charging current by the charging current measurement unit, and the remaining battery level is a threshold value. And when the charge current is less than a threshold value of the charge current indicating the trickle charge mode state, a function restriction is performed to suppress current consumption, and the battery remaining amount exceeds the threshold value or the battery When the remaining amount is equal to or less than a threshold value and the charging current is equal to or more than the threshold value of the charging current indicating the trickle charge mode state, the function restriction determination process is terminated without performing the function restriction. Device power control method. 充電可能な電池の残量を検出する電池残量測定手段、
充電器からの充電電流を検出する充電電流測定手段、
前記電池残量測定手段の検出値から得た電池残量が閾値以下であると判定した場合に、更に、前記充電電流測定手段により充電電流を検出し、前記電池残量が閾値以下であり、且つ、前記充電電流がトリクル充電モード状態を示す充電電流の閾値未満である場合には消費電流を抑制するための機能制限を行い、前記電池残量が閾値を超える場合または前記電池残量が閾値以下であって前記充電電流が前記トリクル充電モード状態を示す充電電流の閾値以上である場合には機能制限を行わずに機能制限の判定処理を終了する制御手段、
としてコンピュータを機能させる携帯電子機器の電源制御プログラム。 A battery level measuring means for detecting the remaining battery level,
Charging current measuring means for detecting charging current from the charger;
When it is determined that the remaining battery level obtained from the detection value of the remaining battery level measuring unit is less than or equal to a threshold , the charging current is further detected by the charging current measuring unit , and the remaining battery level is less than or equal to the threshold. and, if the charging current is less than a threshold of the charging current indicating trickle charge mode state have line function restriction for suppressing the current consumption, or when the battery remaining amount the battery level exceeds a threshold value Is a control means for ending the function restriction determination process without performing function restriction when the charge current is equal to or less than a threshold value and the charge current is equal to or greater than the charge current threshold value indicating the trickle charge mode state ,
As a power control program for portable electronic devices that allow a computer to function as a computer .
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