JP2008148520A - Portable device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable device for standardizing chargers required for various types of the portable devices so as to maintain compatibility, and to provide a charger. <P>SOLUTION: The portable device charged by the noncontact charger comprises: a control section 105 for transmitting individual information on the portable device to the noncontact charger; an authentication transmitting section 106; a power receiving antenna 102 for receiving charge power transmitted from the noncontact charger at a predetermined frequency based on the individual information; a rectification circuit 103; and a rechargeable battery 104. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable device having a charging function, and particularly to a portable device that charges a rechargeable battery by power transmission / reception using microwaves.

  When charging portable devices such as portable radios, personal digital assistants (PDAs), portable audio (portable MD players, portable CD players, portable MP3 players, etc.), notebook personal computers, etc. In order to electrically connect the battery charger and the charging device, a configuration including a contact such as a metal part is known. In such a configuration, the charging device or adapter may not be compatible with each device, and a dedicated charging device or adapter may be required for each portable device.

  As for the connection method between the portable device and the charging device, there is known a non-contact charging method in which charging power is transmitted from the charging device to the portable wireless device using electromagnetic induction in addition to the connection using the contact point such as the metal part described above. It has been. This non-contact charging method includes a primary coil for supplying charging power to the charging device, and further includes a secondary coil in the portable device, so that the secondary coupling is achieved by electromagnetic coupling between the primary coil and the secondary coil. Electric power is transmitted to the coil. The secondary battery provided in the portable device is charged by the electric power transmitted to the secondary coil (for example, Patent Document 1). However, this non-contact charging method using electromagnetic induction has to provide charging power acquisition means such as a coil on the portable device side, which hinders downsizing of the portable device.

As a non-contact charging method, a non-contact charging method using a microwave is also known as a known technique. This non-contact charging method is realized by using a rectenna. The portable device has an antenna having a function of receiving charging power converted into microwaves, and further converts the received microwave energy into direct current. Charging is performed by rectification conversion.
JP 2004-222457 A

  However, in the non-contact charging device using electromagnetic induction and the non-contact charging device using microwaves, portable devices such as a non-contact charging device dedicated to a portable radio and a non-contact charging device dedicated to a PDA are used. Therefore, it is necessary to prepare a plurality of incompatible charging devices, and management of the charging devices becomes complicated.

  The present invention has been made in order to solve the above-described problems, and aims to share a charging device required for each type of portable device, so that one non-contact charging is performed for different types of portable devices. It is an object of the present invention to provide a portable device that can be charged by a device.

  In order to solve the above-described problem, a mobile device according to the present invention is a mobile device that can be charged by a non-contact charging device, and a transmitter that transmits individual information of the mobile device to the non-contact charging device; A power receiving unit that receives charging power transmitted at a predetermined frequency based on the individual information from the non-contact charging device.

  ADVANTAGE OF THE INVENTION According to this invention, the portable apparatus made compatible can be provided by sharing the charging device required for every classification of each portable apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the embodiment of the present invention includes a portable device and a non-contact charging device, and employs the above-described non-contact charging method using microwaves in order to charge the portable device with the non-contact charging device.

  FIG. 1 shows a functional block diagram of a portable device according to this embodiment. The mobile device 101 includes a power receiving antenna unit 102 that receives power output as a microwave, a rectifier circuit unit 103 that converts the received microwave into DC power, and a rechargeable battery 104 that is a secondary battery of the mobile device 101. . Furthermore, it includes a control unit 105 that controls individual information (hereinafter referred to as authentication information) set for each type of portable device and controls the charging status, and provides authentication information and charging status information to the non-contact charging device 201 described later. An authentication transmission unit 206 that performs communication of information is provided. Furthermore, the mobile device 101 includes a mobile device display unit 107 that displays a charging status or the like.

  Next, a functional block diagram of the non-contact charging apparatus according to the present embodiment is shown in FIG. The non-contact charging device 201 includes a power transmission antenna unit 202 that outputs electric power converted into microwaves, a conversion unit 203 that converts electric power into microwaves of a predetermined frequency, and a charging device display unit 204 that displays a charging status of a portable device. Is provided. Further, the non-contact charging apparatus 201 determines whether or not the mobile device is a chargeable device, sets a transmission frequency associated with each type of the mobile device 101, and further recognizes the charging status of the mobile device 101. The unit 205 is provided. In addition, an authentication reception unit 206 that performs communication with the mobile device such as authentication information from the mobile device 101 and information on a charging state of the mobile device 101 is provided.

  The portable device 101 in this embodiment includes a portable wireless device, a portable information terminal (Personal Digital Assistants: PDA), a portable audio (a portable MD player, a portable CD player, a portable MP3 player, etc.), a notebook personal computer. This corresponds to a computer (notebook PC) or the like, but does not specify a device, and can be applied to a portable device that includes a secondary battery and can be charged.

  The transmission unit corresponds to the control unit 105 and the authentication transmission unit 106 in the embodiment, and the power reception unit corresponds to the power reception antenna unit 102, the rectifier circuit unit 103, and the rechargeable battery 104 in the embodiment.

  Next, the processing in the embodiment of the present invention is shown in the flowchart of FIG. In the flowchart, the process indicated by a solid line indicates a process in the non-contact charging apparatus 201, and the process indicated by a broken line indicates a process in the mobile device 101.

  In order for the determination unit 205 to determine whether or not the mobile device can be charged, and to determine whether or not the mobile device 101 is placed (set) in the vicinity of the non-contact charging device 201, an authentication signal for performing authentication is provided. It transmits via the authentication receiving part 206 (step S1). Here, when the portable device 101 is set in the vicinity of the contactless charging apparatus 201 (step S2, Yes), the authentication transmission unit 106 receives the authentication signal and transmits the authentication signal to the control unit 105 (step S3). ). The authentication signal continues to be transmitted until the mobile device 101 is set in the vicinity of the non-contact charging device 201 (No in step S2).

  The control unit 105 to which the authentication signal is transmitted transmits authentication information unique to the mobile device to the authentication transmission unit 106, for example, the type of the mobile device, and the authentication transmission unit 106 further transmits the authentication information to the authentication reception unit 206. (Step S4). In the present embodiment, wireless communication using RFID, wireless LAN, Bluetooth (registered trademark), infrared light, or the like is used as a communication unit from the authentication transmission unit 106 to the authentication reception unit 206.

  The authentication receiving unit 206 transmits the received authentication information to the determination unit 205, and the determination unit 205 determines whether the portable device 101 is a device that can be contactlessly charged based on the authentication information (step S5). Here, when the authentication determination result by the determination unit 205 is NO (step S5, No), the process ends, and non-contact charging is not performed (step S6). When the authentication determination result by the determination unit 205 is good (Yes in step 5), the determination unit 205 is configured to transmit charging power associated with each portable device in advance based on the transmitted authentication information. A frequency to be used (hereinafter, charging frequency) is set (step S7).

  In the present embodiment, the association between the authentication information transmitted from the portable device 101 and the charging frequency is stored in a storage device (not shown) built in the non-contact charging device 201. For example, the portable wireless device is “A (GHz)”. The correspondence information between the authentication information and the charging frequency, such as “B (GHz)” for the PDA and “C (GHz)” for the notebook PC, is stored in advance, and is performed based on the correspondence information.

  Further, as a method for setting the charging frequency, the control unit 105 of the mobile device 101 holds the charging frequency information (“A”, “B”, “C”, etc. in the above example) in advance and performs charging. Authentication information including frequency information may be transmitted, and the determination unit 205 of the contactless charging apparatus 201 may be set by extracting charging frequency information from the authentication information.

  When the charging frequency is set by the determination unit 205, the conversion unit 203 converts the electric power into a microwave having the charging frequency and outputs the microwave through the power transmission antenna unit 202 (step S8). The power receiving antenna unit 102 of the portable device 101 receives the microwave output in this way (step S9).

  The rectifier circuit unit 103 converts the microwave received by the power receiving antenna unit 102 into a direct current (step S10), and charging is started by supplying the converted direct current to the rechargeable battery 104 ( Step S11).

  The control unit 105 detects the charging status of the rechargeable battery 104, and the control unit 105 further displays the charging status (remaining time, charging rate, etc.) on the portable device display unit 107 based on the charging information (step S12). . In addition, the control unit 105 transmits the detected charging information to the determination unit 205 of the non-contact charging device 201 via the authentication transmission unit 106 and the authentication reception unit 206. The determination unit 205 displays the charging status on the charging device display unit 204 based on the received charging information (step S13).

  The control unit 105 detects the charging status of the rechargeable battery 104 as needed, and displays the charging status on the portable device display unit 107 and the charging device display unit 204 until charging is completed (No in step S14). When the charging of the rechargeable battery 104 is completed (step S14, Yes), the control unit 105 detects the completion information, and displays the charging completion on the portable device display unit 107. In addition, the control unit 105 transmits completion information to the determination unit 205 via the authentication transmission unit 106 and the authentication reception unit 206 in the same manner as the charging information described above. Further, the determination unit 205 causes the charging device display unit 204 to display completion information. In a state where the portable device 101 is not set in the vicinity of the non-contact charging device 201 (a state where charging is not performed), the charging device display unit 204 of the non-contact charging device 201 may display the time.

  According to the present invention, it is possible to charge a plurality of portable devices (notebook PC, PDA, portable wireless device, portable audio, etc.) with one non-contact charging device. This eliminates the need for a dedicated charging device for each portable device, which makes it easy to manage the charging device.

  Further, by charging in a non-contact manner, it is not necessary to connect to a charging device or an adapter having a contact such as a metal part, and the waterproofness of the portable device is improved.

It is a functional block diagram which shows the portable apparatus in embodiment of this invention. It is a functional block diagram which shows the non-contact charging device in embodiment of this invention. It is a flowchart which shows a process in embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 101 Mobile device, 102 Power receiving antenna part, 103 Rectifier circuit part, 104 Rechargeable battery, 105 Control part, 106 Authentication transmission part, 107 Portable apparatus display part, 201 Non-contact charging device, 202 Power transmission antenna part, 203 Conversion part, 204 Display Unit, 205 determination unit, 206 authentication receiving unit.

Claims (1)

A portable device that can be charged by a non-contact charging device,
A transmission unit for transmitting individual information of the portable device to the contactless charging device;
A power receiving unit that receives charging power transmitted at a predetermined frequency based on the individual information from the contactless charging device;
A portable device comprising:

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