WO2002067404A1 - Dispositif de communication sans fil et procede de commutation d'alimentation - Google Patents

Dispositif de communication sans fil et procede de commutation d'alimentation Download PDF

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Publication number
WO2002067404A1
WO2002067404A1 PCT/JP2001/001199 JP0101199W WO02067404A1 WO 2002067404 A1 WO2002067404 A1 WO 2002067404A1 JP 0101199 W JP0101199 W JP 0101199W WO 02067404 A1 WO02067404 A1 WO 02067404A1
Authority
WO
WIPO (PCT)
Prior art keywords
wireless communication
communication device
power supply
computer device
built
Prior art date
Application number
PCT/JP2001/001199
Other languages
English (en)
Japanese (ja)
Other versions
WO2002067404A8 (fr
Inventor
Masazumi Yamazaki
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP24261899A priority Critical patent/JP2001069236A/ja
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to PCT/JP2001/001199 priority patent/WO2002067404A1/fr
Priority to US10/296,472 priority patent/US20030139207A1/en
Publication of WO2002067404A1 publication Critical patent/WO2002067404A1/fr
Publication of WO2002067404A8 publication Critical patent/WO2002067404A8/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1632—External expansion units, e.g. docking stations
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/263—Arrangements for using multiple switchable power supplies, e.g. battery and AC
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/0277—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof according to available power supply, e.g. switching off when a low battery condition is detected
    • 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
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a wireless communication device and a power supply switching method, and more particularly to a wireless communication device connected to a computer device such as a personal computer and a power supply switching method.
  • a portable computer device such as a notebook personal computer has been provided with a communication device to perform data communication via radio; a wireless communication device is connected to the computer device via a PCMCIA interface or the like. It is common to use In this case, the wireless communication device generally receives power from the power supply of the computer device via the interface or the like.
  • the conventional wireless communication device has the following problems. In other words, since the conventional wireless communication device is driven by receiving power from the power supply of the computer device, when the computer device is driven by the built-in battery during mobile use, the built-in battery is Power must be supplied to both computer equipment and wireless communication equipment. Therefore, there is a problem in that when the computer device performs data communication via wireless when using the mopile, the consumption of the built-in battery increases and the driving time of the computer device decreases.
  • An object of the present invention is to provide a wireless communication device and a power supply switching method capable of preventing a drive time of a computer device from being shortened while maintaining portability.
  • a dedicated battery for driving a wireless communication device is provided inside a wireless communication device, and the wireless communication device uses the dedicated battery without using a built-in battery of a computer device. It is powered by a battery.
  • FIG. 1 is a device configuration diagram for explaining an installation state of a wireless communication device and a computer device according to Embodiment 1 of the present invention.
  • FIG. 2 is a block diagram showing a schematic configuration of the wireless communication device and the computer device according to Embodiment 1 of the present invention.
  • FIG. 3A is a block diagram showing a schematic configuration of a power supply control unit in the wireless communication device according to Embodiment 1 of the present invention.
  • FIG. 3B is a block diagram showing a schematic configuration of the power supply control unit in the wireless communication device according to Embodiment 1 of the present invention.
  • FIG. 4 is a block diagram showing a schematic configuration of a wireless communication device and a computer device according to Embodiment 2 of the present invention.
  • FIG. 5 is a block diagram showing a schematic configuration of a wireless communication device and a computer device according to Embodiment 3 of the present invention.
  • FIG. 6 is a block diagram showing a schematic configuration of a wireless communication device and a computer device according to Embodiment 4 of the present invention.
  • the wireless communication device includes a dedicated power supply for driving the wireless communication device inside the wireless communication device, and is used when the computer device is driven using the power supply built in the computer device. Is driven using a power supply built in the wireless communication device.
  • FIG. 1 is a device configuration diagram for explaining an installation state of a wireless communication device and a computer device according to Embodiment 1 of the present invention.
  • a wireless communication device 101 having an antenna 102 is connected to a portable computer device 103 such as a notebook computer via a connection interface 1 ⁇ 4.
  • the wireless communication device 101 is used, for example, by being fixed to the back of the combination device 103.
  • the computer device 103 has a battery device built-in battery 105, which is driven by the external power supply device 107 when the outlet 106 is connected, and when the outlet 106 is not connected. It is driven by the built-in battery 105.
  • FIG. 2 is a block diagram showing a schematic configuration of the wireless communication device and the combination device according to Embodiment 1 of the present invention.
  • wireless section 201 performs predetermined wireless processing and modulation / demodulation processing on data transmitted and received via antenna 102.
  • the control processing unit 202 converts the received data into a data format that can be read by the computer device and transmits the data format to the computer device 103. Also, the control processing unit 202 receives the transmitted data from the computer 103 and transmits the data. Convert overnight format. In addition, the control processing unit 202 performs various controls and processes of the wireless communication device 101.
  • the power supply control unit 203 controls switching of a power supply used for driving the wireless communication device 101.
  • the configuration of the power control unit 203 will be described later.
  • the wireless communication device built-in battery 204 is a power supply dedicated to driving the wireless communication device 101 installed inside the wireless communication device 101.
  • the connection interface 104 connecting the wireless communication device 101 and the computer device 103 includes a data transmission interface 211, a detection signal transmission interface 211, and power transmission. It consists of an evening ace 2 13. Data transmission is performed between the wireless communication device 101 and the computer device 103 via the data transmission interface 211. Via the detection signal transmission interface 212, a detection signal indicating that the computer 103 is being driven using the external power supply 107 is sent from the computer 103 to the wireless communication device. Sent to 101. In addition, power is supplied from the computer device 103 to the wireless communication device 101 via the power transmission interface 213.
  • the information processing unit 221 performs various processes on data transmitted from the wireless communication device 101 via the data transmission interface 211. Also, the information processing section 221 performs various processes on the data input to the computer 103, and then transmits the data via the data transmission interface 211 to the wireless communication device 211. 0 Transmit to 1.
  • the power detection unit 222 detects the state of power supply to the computer 103 and controls a switch included in the power detection unit 222 to perform power switching control.
  • FIGS. 3A and 3B are block diagrams showing a schematic configuration of a power supply control unit in the wireless communication apparatus according to Embodiment 1 of the present invention.
  • the charge control unit 301 controls the wireless communication device built-in battery 204 to be charged with a predetermined appropriate charge amount.
  • the switching switch 302 operates in accordance with the detection signal sent from the power detection unit 222, and switches the power used when the wireless communication device 101 is driven.
  • the power detection unit 222 controls the switch included in the power detection unit 222 when the outlet 106 is disconnected and power is not supplied from the external power device 107. This connects the computer device built-in battery 105 and the information processing unit 221 so that the information processing unit 221 is driven by the computer device built-in battery 105. At this time, no detection signal is sent from the power supply detection section 222 to the switching switch 302.
  • the switching switch 302 is set to the black circle side as shown in FIG. 3A. Switch to.
  • the wireless communication device built-in battery 204 and the control processing unit 202 are connected, so that when the computer device 103 is driven by the computer device built-in battery 105, the wireless communication The device 101 is driven by using the battery 204 built in the wireless communication device as a power supply. As a result, the power of the battery device built-in battery 105 is not consumed for driving the wireless communication device 101.
  • the power detection unit 222 detects that the outlet 106 is connected and the computer 103 is supplied with power from the external power supply 107. In this case, while the power is supplied from the external power supply 107, the detection signal is sent to the switching switch 302 via the detection signal transmission interface 212.c In this case, The power detection unit 222 connects the external power supply 107 to the power transmission interface 212 by controlling a switch included in the power detection unit 222.
  • the power supply detection unit 222 connects the external power supply device 100 to the information processing unit 221 by controlling a switch included in the power supply detection unit 222, and The unit 222 is driven by the external power supply 107.
  • the switching switch 302 when the detection signal is sent to the switching switch 302, the switching switch 302 is switched to the white circle side as shown in FIG. 3B. As a result, the power transmission interface 2 13 and the control processing section 202 are connected, so that when the computer 103 is supplied with power from the external power supply 107, The communication device 101 is also driven by receiving power supply from the external power supply device 107.
  • the power transmission interface 21 and the wireless communication device built-in battery 204 are connected to the charging control section 310.
  • the wireless communication built-in battery 204 is charged by the power supplied from the external power supply device 107.
  • the charge control unit 301 monitors the amount of charge of the wireless communication device built-in battery 204, and when the charge amount reaches a predetermined appropriate amount, the charge to the wireless communication device built-in battery 204 is performed. Cut off the power supply.
  • a dedicated power supply for driving the wireless communication device is provided inside the wireless communication device, and the computer device is built in the computer device.
  • the wireless communication device is driven using a power supply, it is driven using the power supply built in the wireless communication device.
  • the power supply built in the computer device may be used to drive the wireless communication device. Disappears. Therefore, when the computer device is driven by using a power supply built in the computer device, it is possible to prevent the driving time of the computer device from being shortened even if a wireless communication device is connected to the computer device.
  • the wireless communication device has a built-in power supply and can be driven without receiving power from an external power supply, so that the convenience of carrying the wireless communication device is not impaired.
  • the difference between the wireless communication apparatus according to the present embodiment and the first embodiment is that the computer apparatus is activated when data is received.
  • FIG. 4 is a block diagram showing a schematic configuration of a wireless communication device and a computer device according to Embodiment 2 of the present invention.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.
  • the radio unit 201 When receiving the data via the antenna 102, the radio unit 201 outputs the data to the incoming call detection unit 401.
  • the incoming call detection unit 401 outputs a signal notifying that the wireless communication device 101 has received data to the incoming display unit 402 when data is output from the wireless unit 201. At the same time, the output data is output to the control processing section 202.
  • the incoming call display section 402 is a display lamp composed of, for example, an LED or the like, and lights up in response to the above-mentioned notification signal. Therefore, the user of the computer device 103 can recognize that the data has been received even if the personal computer device 103 is not running.
  • the user of the computer apparatus 103 recognizes that the wireless communication apparatus 101 has received a message by turning on the incoming call display section 402, and presses the push button switch 403. This instructs the incoming call detection unit 401 to generate a combination device activation signal.
  • the incoming call detection section 401 generates a computer device start signal and sends the start signal to the start signal detection section 4 21 via the start signal transmission interface 4 11.
  • the activation signal detector 421 activates the computer device 103 in accordance with the activation signal.
  • the incoming call detection unit 401 may be configured to automatically generate a computer device activation signal when the wireless unit 201 outputs a message. In this case, the push button switch 403 becomes unnecessary.
  • the computer device may use the built-in battery for driving the wireless communication device.
  • a configuration in which the device is driven may be employed.
  • the power supply detection unit 222 detects the power supply state of the computer device 103. That is, the power supply detection unit 222 determines whether or not the computer device 103 is supplied with power from the external power supply device 107, and determines whether the charge amount of the battery 105 built into the computer device is a predetermined charge amount. Check if has been reached.
  • the detection unit 222 sends a detection signal to the power supply control unit 203 via the detection signal transmission interface 211. In accordance with this detection signal, the power supply control unit 203 drives the computer device 103 using the wireless communication device built-in battery 204.
  • the computer device is activated when data is received, so that the power consumption of the combination device can be suppressed. Therefore, when the computer device is driven using the power supply built in the combination device, the driving time of the combination device can be extended.
  • the difference between the wireless communication apparatus according to the present embodiment and the second embodiment is that the wireless communication apparatus has a processing function for e-mail and the like in addition to a data transmission / reception function.
  • FIG. 5 is a block diagram showing a schematic configuration of a wireless communication device and a computer device according to Embodiment 3 of the present invention.
  • the same components as those in the second embodiment are denoted by the same reference numerals, and detailed description is omitted.
  • the radio section 201 Upon receiving the data via the antenna 102, the radio section 201 outputs the data to the reception processing section 501.
  • the reception processing unit 501 has, for example, an e-mail reception function.
  • the reception processing unit 501 transmits the e-mail title and the text data.
  • data other than the title and the text for example, the attached file, image data pasted into the e-mail text, etc.
  • the reception processing unit 501 displays the fact on the reception content display unit 502. If the data output from the wireless unit 201 is a data other than an e-mail, the reception processing unit 501 only displays that the data has been received. To be displayed.
  • the control processing unit 202 transmits data other than the title and text
  • the information is transmitted to the information processing unit 221 via the interface 221.
  • the user of the computer 103 can check the title and the text of the e-mail on the received content display section 502, so that the e-mail contains a message other than the title and the text. If it is not added, there is no need to start the computer device 103.
  • a message indicating that there is data other than the title and text is displayed on the received content display section 502, and only when the user of the computer 103 wants to process the data.
  • Pressing the push button switch 403 instructs the reception processing section 501 to generate a computer device activation signal.
  • the reception processing unit 501 generates a computer device activation signal and sends the activation signal to the activation signal detection unit 4 21 via the activation signal transmission interface 4 11 1.
  • the activation signal detector 421 activates the computer 103 according to the activation signal. This makes it possible for the information processing section 221 to perform processing on data other than the title and the text.
  • the wireless communication device 101 has a transmission content input unit 503. As a result, the user of the computer 103 can directly communicate the title and the text of the e-mail using the transmission content input section 503 without activating the computer 103. Device 101 can be entered. The data input to the transmission content input section 503 is output to the control processing section 202 for processing. If the wireless communication device 101 has an e-mail processing function, the wireless communication device 101 can connect to the convenience device 103 without connecting the wireless communication device 101 to the convenience device 103. Can input / output and send / receive title and text. For this reason, by making the connection interface 104 an interface detachable from the wireless communication device 101 or the computer device 103, the wireless communication device 101 becomes a mobile terminal device dedicated to e-mail. As Can also be used.
  • the wireless communication device and the power supply switching method according to the present embodiment since it has a processing function for e-mail and the like in addition to the data transmission / reception function, it does not need to start the computer device, Can read e-mail and so on. Therefore, when the computer device is driven using a power supply built in the computer device, the drive time of the computer device can be further extended as compared with the second embodiment. In addition, since the wireless communication device can be used independently as a portable terminal device, the convenience of the wireless communication device user is improved.
  • the wireless communication device when the computer device does not use an external power source as a power source and the battery built in the computer device does not reach a predetermined charge, the wireless communication device is activated.
  • the configuration may be such that the computer device is driven using a built-in battery.
  • FIG. 6 is a block diagram showing a schematic configuration of a wireless communication device and a computer device according to Embodiment 4 of the present invention.
  • the same components as those of the third embodiment are denoted by the same reference numerals, and the detailed description is omitted.
  • the wireless communication device 101 and the computer device 103 include a non-contact coupling portion 601 which is an interface having no mechanical connection portion such as a connector or the like. Connected. These non-contact coupling portions 600 are connected to each other using a weak electric wave, electromagnetic induction, light, or the like as a connection medium.
  • the wireless communication apparatus and the power supply switching method according to the present embodiment since the wireless communication device is connected to the computer via the non-contact type connection interface, the connection and disconnection between the wireless communication device and the computer device are easier than in the third embodiment. Further, the convenience of the wireless communication device user is improved. In addition, since the wireless communication device is connected to the computer device through a non-contact type connection interface, it is possible to avoid poor contact due to wear of the connection connector, etc. The reliability of data transmission is improved.
  • wireless communication devices according to the first to fourth embodiments can be used by being connected to a stationary combination device.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Human Computer Interaction (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephone Function (AREA)
  • Telephonic Communication Services (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Communication Control (AREA)

Abstract

Un détecteur d'énergie (222) produit un signal indiquant qu'un ordinateur (103) est alimenté par une alimentation externe (107). Si ledit signal n'est pas envoyé du détecteur (222) à une commande d'alimentation (203) par l'intermédiaire d'une interface de transmission de signal (212), la commande d'alimentation (203) induit une commutation pour qu'un dispositif de communication sans fil (101) fonctionne sur une batterie (204) intégrée à ce dernier.
PCT/JP2001/001199 1999-08-30 2001-02-20 Dispositif de communication sans fil et procede de commutation d'alimentation WO2002067404A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP24261899A JP2001069236A (ja) 1999-08-30 1999-08-30 無線通信装置および電源切り替え方法
PCT/JP2001/001199 WO2002067404A1 (fr) 1999-08-30 2001-02-20 Dispositif de communication sans fil et procede de commutation d'alimentation
US10/296,472 US20030139207A1 (en) 1999-08-30 2001-02-20 Wireless communication device and method of switching power supply

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP24261899A JP2001069236A (ja) 1999-08-30 1999-08-30 無線通信装置および電源切り替え方法
PCT/JP2001/001199 WO2002067404A1 (fr) 1999-08-30 2001-02-20 Dispositif de communication sans fil et procede de commutation d'alimentation

Publications (2)

Publication Number Publication Date
WO2002067404A1 true WO2002067404A1 (fr) 2002-08-29
WO2002067404A8 WO2002067404A8 (fr) 2003-03-06

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WO (1) WO2002067404A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001069236A (ja) * 1999-08-30 2001-03-16 Matsushita Electric Ind Co Ltd 無線通信装置および電源切り替え方法
JP2002279374A (ja) * 2001-03-15 2002-09-27 Mitsubishi Electric Corp 無線通信用ｐｃカード
TWI364669B (en) * 2005-12-02 2012-05-21 Elitegroup Computer Sys Co Ltd Computer apparatus, wireless network transmission system and transmission method thereof
JP5622363B2 (ja) * 2009-03-16 2014-11-12 株式会社東芝 電子機器システム
JP5959862B2 (ja) * 2012-02-01 2016-08-02 キヤノン株式会社 電力供給装置及びプログラム
WO2015041206A1 (fr) * 2013-09-17 2015-03-26 株式会社ジーデバイス Dispositif d'activation automatique d'appareil, appareil d'informations portatif, système d'appareil d'informations portatif et programme

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US5122729A (en) * 1990-01-08 1992-06-16 Sharp Kabushiki Kaisha Power supply device including induction voltage detection coil for charging portable electronic devices
JPH05110727A (ja) * 1991-10-18 1993-04-30 Ricoh Co Ltd フアクシミリ装置
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WO1995008222A1 (fr) * 1993-09-15 1995-03-23 Ericsson Ge Mobile Communications, Inc. Systemes d'alimentations pour modules enfichables
EP0695017A2 (fr) * 1994-07-26 1996-01-31 International Business Machines Corporation Dispositif de connexion de batterie pour ordinateur et méthode de commutation de batteries
US5684384A (en) * 1995-10-31 1997-11-04 Motorola, Inc. Apparatus and method for discharging and charging a multiple battery arrangement
EP0875977A2 (fr) * 1997-05-02 1998-11-04 O2 Micro, Inc. Sélecteur amélioré de batterie intelligente
JPH11275245A (ja) * 1998-03-23 1999-10-08 Kyocera Corp 電池内蔵型携帯無線端末
JP2000284864A (ja) * 1999-03-30 2000-10-13 Matsushita Electric Ind Co Ltd 携帯型情報処理装置
JP2001069236A (ja) * 1999-08-30 2001-03-16 Matsushita Electric Ind Co Ltd 無線通信装置および電源切り替え方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0434231A2 (fr) * 1989-12-18 1991-06-26 Hewlett-Packard Company Accessoire d'appel de personnes pour dispositifs de calcul portatifs
US5122729A (en) * 1990-01-08 1992-06-16 Sharp Kabushiki Kaisha Power supply device including induction voltage detection coil for charging portable electronic devices
JPH05110727A (ja) * 1991-10-18 1993-04-30 Ricoh Co Ltd フアクシミリ装置
WO1995001692A1 (fr) * 1993-06-30 1995-01-12 Motorola Inc. Dispositif electronique regulateur interne de charge
WO1995008222A1 (fr) * 1993-09-15 1995-03-23 Ericsson Ge Mobile Communications, Inc. Systemes d'alimentations pour modules enfichables
EP0695017A2 (fr) * 1994-07-26 1996-01-31 International Business Machines Corporation Dispositif de connexion de batterie pour ordinateur et méthode de commutation de batteries
US5684384A (en) * 1995-10-31 1997-11-04 Motorola, Inc. Apparatus and method for discharging and charging a multiple battery arrangement
EP0875977A2 (fr) * 1997-05-02 1998-11-04 O2 Micro, Inc. Sélecteur amélioré de batterie intelligente
JPH11275245A (ja) * 1998-03-23 1999-10-08 Kyocera Corp 電池内蔵型携帯無線端末
JP2000284864A (ja) * 1999-03-30 2000-10-13 Matsushita Electric Ind Co Ltd 携帯型情報処理装置
JP2001069236A (ja) * 1999-08-30 2001-03-16 Matsushita Electric Ind Co Ltd 無線通信装置および電源切り替え方法

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JP2001069236A (ja) 2001-03-16
WO2002067404A8 (fr) 2003-03-06

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