JP2011123708A - Non-contact type information management/charging system, mobile communication terminal and non-contact type information/power transmission unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact type information management/charging system achieved in miniaturization or the like by a simple configuration. <P>SOLUTION: The non-contact type information management/charging system includes: a mobile communication terminal having a non-contact communication IC module including a non-contact communicating antenna and a non-contact charging module including a power receiving coil; a reader/writer performing the transfer of data with the non-contact communication IC module; and a power supply device performing non-contact charging to the non-contact charging module by an electromagnetic induction system. A communication face of the reader/writer and a power supply face of the power supply device are oppositely disposed apart from each other at a prescribed distance. The communication terminal includes the non-contact communicating antenna at one face side of two faces facing each other of a casing in the mobile communication terminal includes the power receiving coil at the other face side of the casing, and includes an electromagnetic shield between the non-contact communicating antenna and the other face side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a contactless information management / charging system and the like.

  In recent years, the diversification of functions has dramatically advanced in mobile communication terminals such as mobile phones, PHS, and PDAs. For example, various portable communication terminals including non-contact communication IC modules that store personal information of users and electronic money in an IC chip and communicate with the outside wirelessly have been proposed.

  Furthermore, a system that realizes both an information management function and a non-contact charging function using a non-contact communication IC module by incorporating a non-contact charging module into a portable communication terminal equipped with the non-contact communication IC module (hereinafter referred to as “ Non-contact type information management / charging system ") has been proposed (for example, see Non-Patent Document 1).

Powermat Ltd. POWERMAT (November 13, 2009) Internet URL <http://www.powermat.com/us/innovation/>

  By the way, in the non-contact information management / charging system disclosed in Non-Patent Document 1, a resonance method using magnetic coupling is adopted as a non-contact charging method. In this resonance method using magnetic coupling, an LC circuit composed of a coil and a capacitor is formed on the transmitting side and the receiving side, and a magnetic field is resonated between both circuits, thereby enabling non-contact charging. Although the resonance method using magnetic coupling does not cause problems such as generation of electromagnetic waves and high frequencies, it requires a large space to build a charging system using the resonance method and realizes non-contact charging. This algorithm is also complicated and there is a problem that it is difficult to reduce the size.

  A non-contact information management / charging system according to the present disclosure includes a non-contact communication IC module including a non-contact communication antenna, a non-contact charging module including a power receiving coil, and the non-contact communication IC. A reader / writer that exchanges data with the module; and a power supply device that performs non-contact charging on the non-contact charging module by an electromagnetic induction method; and a communication surface of the reader / writer and the power supply device The power supply surface of the mobile communication terminal is opposed to each other at a predetermined distance, and the mobile communication terminal has a power storage device including an ultracapacitor that stores the power received by the power receiving coil. The non-contact communication antenna is provided on the surface of the housing where the display unit is formed, and the battery is mounted on the other surface of the housing. The The surface, the power receiving coil is provided, the back panel of the display unit functioning as an electromagnetic shield between said non-contact communication antenna the power receiving coil is provided.

  The contactless information / power transmission unit of the present disclosure includes a reader / writer that exchanges data with a contactless communication IC module, and a power supply that performs contactless charging to the contactless charging module by electromagnetic induction. And the communication surface of the reader / writer and the communication surface of the power supply device are arranged to face each other with a predetermined distance therebetween.

  The mobile communication terminal of the present disclosure is a mobile communication terminal having a contactless communication IC module including a contactless communication antenna and a contactless charging module including a power receiving coil for performing contactless charging by an electromagnetic induction method. The non-contact communication antenna is provided on one surface of the housing of the mobile communication terminal, and the power receiving coil is provided on the other surface of the housing. And an electromagnetic shield is provided between the power receiving coil.

It is a figure which shows the structure of the non-contact-type information management and charging system which concerns on this embodiment. It is a figure which shows the structure of a portable communication terminal. It is a figure which shows the principal part cross section of a portable communication terminal. It is the figure which illustrated the relationship between an information and electric power transmission unit and a portable communication terminal. It is the figure which illustrated the relationship between an information and electric power transmission unit and a portable communication terminal. It is a sequence diagram which shows operation | movement of the information management and charging system of a non-contact system. It is a figure which shows the principal part cross section of the mobile communication terminal which concerns on a modification. It is a figure which shows the structure of the information and electric power transmission unit which concerns on a modification. It is a figure which shows the structure of the information and electric power transmission unit which concerns on a modification. It is a figure which shows the structure of the information and electric power transmission unit which concerns on a modification. It is a figure which shows the structure of the information and electric power transmission unit which concerns on a modification.

A. Embodiment (1) Configuration of Embodiment FIG. 1 is a diagram showing a configuration of a contactless information management / charging system 100 according to this embodiment.
A contactless information management / charging system 100 includes a portable communication terminal 400 including a contactless communication IC module and a contactless charging module, an information / power transmission unit 700 including a reader / writer 500 and a wireless power supply unit 600. It is configured with.

  The contactless information management / charging system 100 according to the present embodiment employs an electromagnetic induction method instead of the resonance method shown in the conventional example as the contactless charging method. When the electromagnetic induction method is adopted, the algorithm can be simplified and the charging system can be made smaller than when the resonance method is adopted, but an electromagnetic wave is generated during non-contact charging, and this electromagnetic wave causes the problem. There is a problem of electromagnetic interference in which noise is generated in the electronic device to induce malfunction or the like. The non-contact information management / charging system 100 according to the present embodiment eliminates the problem of electromagnetic interference caused by adopting the electromagnetic induction method by adopting the following configuration.

1-1. Mobile communication terminal 400
2 is a block diagram showing the configuration of the mobile communication terminal 400, and FIG. 3 is a cross-sectional view showing the main configuration of the mobile communication terminal 400. As shown in FIG.
The mobile communication terminal 400 includes a control unit 410, a display unit 420, a communication unit 430, a non-contact communication IC module 200, and a non-contact charging module 300.

  The mobile communication terminal 400 is, for example, a mobile phone, a PHS (Personal Handyphone System), a PDA (Personal Digital Assistant), and the like. Realize the contactless charging function used. Note that the portable communication terminal 400 is not limited to these, and can be applied to any electronic device including a chargeable power storage device (for example, an ultracapacitor or a secondary battery) such as a notebook personal computer or a portable digital audio player. . In the present embodiment, a foldable mobile communication terminal is assumed (see FIG. 3), but the present invention can be applied to any type of mobile communication terminal such as a slide type. The ultracapacitor means an electric double-layer capacitor using an electric double layer generated at an interface between activated carbon and an electrolyte as an operating principle.

  The control unit 410 is configured by a CPU, a ROM, a RAM, and the like, and centrally controls each unit of the mobile communication terminal 400 when the CPU executes various control programs stored in the ROM or the like as in the past.

  The display unit 420 includes, for example, an LCD (Liquid Crystal Display), and is provided on the front surface of the upper body 401a of the mobile communication terminal 400 as shown in FIG. The display unit 420 displays execution results of various control programs and the like, as in the conventional case.

  The communication unit 430 includes a mobile communication antenna, each communication interface, and the like, and exchanges data (speech data, character data, etc.) between portable communication terminals as in the past. Note that the communication unit 430 may have other communication functions such as near field communication (for example, Bluetooth) and infrared communication.

  The operation unit 440 includes operation buttons such as numeric keys and character keys, for example, and is provided on the front surface of the lower body 401b of the mobile communication terminal 400 as shown in FIG.

<Non-contact communication IC module 200>
The non-contact communication IC module 200 exchanges data with the reader / writer 500 by wireless communication under the control of the control unit 410. The non-contact communication IC module 200 includes a chip secondary battery 210, an IC chip 220, And an antenna coil 230 for contact communication (see FIG. 2).

  The non-contact communication IC module 200 is stored in the IC chip 220 using radio waves in a low frequency band of about several MHz to several tens of MHz (for example, 13.56 MHz) received from the reader / writer 500, as in the past. Each information is transmitted to the reader / writer 500, and each information stored in the IC chip 220 is changed in accordance with an instruction from the reader / writer 500.

  The IC chip 220 constitutes an IC tag together with the non-contact communication antenna 230, and includes a CPU and various memories (RAM, EEPROM, etc.) as in the past, and is associated with a unique tag ID as an identifier and a tag ID. Information (hereinafter referred to as “ID related information”) and the like are stored in the memory, and the ID related information stored in the memory is changed in accordance with an instruction from the reader / writer 500.

  The non-contact communication antenna coil 230 is an antenna for performing wireless communication with the reader / writer 500 and uses, for example, a thin copper wire wound several times to several hundred times on a loop, as in the past. can do. The non-contact communication antenna coil 230 is provided on the surface of the mobile communication terminal 400 (or in the vicinity of the surface of the mobile communication terminal 400) as shown in FIG. In the claims, the term “surface side” is used as a concept including the surface or the vicinity of the surface. An electromagnetic shield 750 for preventing electromagnetic interference is provided between the non-contact communication antenna coil 230 and the power receiving coil 320 for receiving power supply from the wireless power supply unit 600 (for details). Later).

  The chip secondary battery 210 is means for supplying power for driving the IC chip 220, and an organic radical battery, for example, can be used as in the prior art. In the present embodiment, an active IC chip that drives the IC chip 220 by using a built-in power supply (here, the chip secondary battery 210) is illustrated. However, the reader / writer 500 does not have a built-in power supply. The present invention can also be applied to a passive IC chip that drives the IC chip 220 by converting radio waves transmitted from the power into electric power.

<Non-contact charging module 300>
The non-contact charging module 300 charges the battery 310 with power supplied from the wireless power supply unit 600 using an electromagnetic induction method under the control of the control unit 410. The battery 310 and the power receiving coil 320 And a charge control circuit 330.

  The battery 310 is a power storage device for portable communication terminals, and is configured by an electric double capacitor such as an ultracapacitor or a supercapacitor, for example. Needless to say, the battery 310 may be formed of not only an electric double capacitor but also a lithium ion secondary battery or a nickel-cadmium battery that is currently widely used. As shown in FIG. 3, the battery 310 is detachably attached to the back surface of the main body lower portion 401 b in the mobile communication terminal 400.

The power receiving coil 320 is a means for receiving power supplied from the power transmission coil by electromagnetic induction generated between the power transmission coil 600 and the power transmission coil (not shown) of the wireless power supply unit 600 as in the prior art.
As shown in FIG. 3, the power receiving coil 320 is provided on the back surface of the mobile communication terminal 400 (or in the vicinity of the back surface of the mobile communication terminal 400). In the claims, the concept including the back surface and the vicinity of the back surface is collectively referred to as “surface side”.

  As described above, the power receiving coil 320 is disposed so as to face the non-contact communication antenna coil 230 with the electromagnetic shield 750 interposed therebetween (see FIG. 3). The electromagnetic shield 750 is made of a material such as copper or aluminum. The presence of the radio wave shield 750 can prevent electromagnetic interference that may occur during non-contact charging (details will be described later). Even when the electromagnetic shield 750 is not provided, when the back panel of the display unit 430 shown in FIG. May be arranged.

  The charging control circuit 330 implements a charging function for accumulating the power supplied from the wireless power supply unit 600 in the battery 310, a battery protection function for preventing the battery 310 from being overcharged, and the like.

1-2. Information and power transmission unit 700
FIG. 4 is a diagram illustrating a main configuration of the information / power transmission unit 700.
As shown in FIG. 1, the information / power transmission unit 700 includes a reader / writer 500 that reads / writes information stored in the contactless communication IC module 200 of the mobile communication terminal 400, and a contactless charging module 300. On the other hand, the wireless power supply unit 600 is configured to supply power using an electromagnetic induction method.

  The reader / writer 500 performs reading of ID related information stored in the IC chip 220, an instruction to change the ID related information, and the like by wireless communication with the non-contact communication IC module 200 mounted on the mobile communication terminal 400.

  The wireless power supply unit (power supply device) 600 includes a power transmission coil, a DC-AC converter, and the like, and the principle of electromagnetic induction with respect to the power reception coil 320 of the non-contact charging module 300 mounted on the mobile communication terminal 400. To supply power with AC voltage.

  As shown in FIGS. 1 and 4, the reader / writer 500 and the wireless power supply unit 600 are arranged with a predetermined distance W apart. Specifically, the communication surface f1 of the reader / writer 500 and the power supply surface f2 of the wireless power supply unit 600 are separated from each other by a predetermined distance W (see FIG. 4), and between the reader / writer 500 and the wireless power supply unit 600. Is formed with a groove S having a width W.

  As shown in FIG. 4, the user using the mobile communication terminal 400 enters the mobile communication terminal 400 into the concave groove S of the information / power transmission unit 700, and the front surface of the upper body 401 a provided with the non-contact communication IC module 200. And the communication surface f1 of the reader / writer 500, the back surface of the main body upper portion 401a where the non-contact charging module 300 is provided, and the power supply surface f2 of the wireless power supply unit 600, respectively. With this operation as a trigger, data communication between the reader / writer 500 and the non-contact communication IC module 200 and power supply from the non-contact charging module 300 and the wireless power supply unit 600 to the non-contact charging module 300 are started. The width W of the concave groove S is a distance (hereinafter, communicable distance) in which data communication can be performed between the reader / writer 500 and the non-contact communication IC module 200 determined theoretically (or experimentally), or wireless power supply. The distance may be determined in consideration of the distance (hereinafter, the distance that can be supplied) in which power can be supplied from the unit 600 to the non-contact charging module 300.

(2) Operation of Embodiment FIG. 5 is a diagram for explaining the operation of the contactless information management / charging system 100.
When the user holding the mobile communication terminal 400 approaches the entrance En of the information / power transmission unit 700, the user enters the recessed groove S of the information / power transmission unit 700, and the non-contact communication IC module 200 is provided. The front surface (see FIG. 3) and the communication surface f1 of the reader / writer 500, the back surface (see FIG. 3) provided with the non-contact charging module 300, and the power supply surface f2 of the wireless power supply unit 600 correspond to each other (FIG. 5). See A). With this operation as a trigger, the following operations related to the information management function and operations related to the non-contact charging function are started substantially simultaneously.

2-1. Operation Regarding Information Management Function FIG. 6 is a sequence diagram showing the operation of the non-contact information management / charging system 100.
When the reader / writer 500 confirms that the IC chip 220 exists in its own communication area based on a signal transmitted from the non-contact communication IC module 200 of the mobile communication terminal 400 (step S10; YES), 13 A tag ID related information acquisition request command is transmitted to the non-contact communication IC module 200 using radio waves in a low frequency band of about .56 MHz (step S20).

  When receiving the tag ID related information acquisition request command from the reader / writer 500, the IC chip 220 of the non-contact communication IC module 200 reads the tag ID related information from the memory according to this command (step S30). Then, the IC chip 220 returns the read tag ID related information to the reader / writer 500 via the non-contact communication antenna coil 230 (step S40). Since the active IC chip 220 is assumed in the present embodiment, the IC chip 220 is driven using the chip secondary battery 210 as a power source.

  On the other hand, the reader / writer 500 uses a timer or the like to transmit a tag ID related information acquisition request command to receive tag ID related information in response to this command (hereinafter referred to as response time) Tr. Is measured. When the measured response time Tr is less than the threshold time Tth set in the memory (step S50; YES), the reader / writer 500 determines that the tag ID related information has been normally received, and for example, tag ID related information. Information management processing such as acquiring / managing personal information of the user is executed. On the other hand, when the measured response time Tr exceeds the threshold time Tth (step S50; NO), it is determined that some abnormality has occurred before the tag ID related information is received, and processing at the time of abnormality (for example, Retry, notification that the reception was not successful, etc.), and the process ends.

2-2. Operation Related to Non-Contact Charging Function The wireless power supply unit 600 uses electromagnetic induction generated between the power transmission coil and the power reception coil 320 of the non-contact charging module 300 to supply power from the power transmission coil to the power reception coil 320. Supply is started (step S110).

  The charging control circuit 330 of the non-contact charging module 300 accumulates the power received from the wireless power supply unit 600 in the battery 310 and starts charging (step S120).

  When the non-contact charging module 300 proceeds to step S130, it determines whether or not the power supply from the wireless power supply unit 600 has ended (step S130). For example, as shown in C of FIG. 5, when the mobile communication terminal 400 exits from the outlet Ex of the concave groove S and is not receiving power supply from the wireless power supply unit 600, the power from the wireless power supply unit 600 is It is determined that the supply has ended (step S130; YES), and the process ends. On the other hand, for example, as shown in FIG. 5B, when the mobile communication terminal 400 is in the groove S and is still receiving power supply from the wireless power supply unit 600, the power supply ends. It is determined that it is not present (step 130; NO), the process proceeds to step S140.

  The charge control circuit (detection means, determination means) 330 of the non-contact charging module 300 detects the state of charge of the battery 310 and whether there is a risk of overcharging when receiving power supply from the wireless power supply unit 600 as it is. It is determined whether or not (step S140). For example, when the storage capacity of the battery 310 does not exceed the set threshold value, the charge control circuit 330 determines that there is no risk of overcharging, while when the storage capacity of the battery 310 exceeds the set threshold value Is determined to be overcharged. If the charging control circuit 330 determines that there is no risk of overcharging (step S140; NO), the charging control circuit 330 returns to step S120 and continues charging the battery 310.

  On the other hand, when the charging control circuit 330 determines that there is a possibility of overcharging (step S140; YES), the non-contact power receiving module 300 prohibits charging of the battery 310 and supplies power to the wireless power supply unit 600. An instruction to be terminated (hereinafter, power supply termination instruction) is transmitted (step S150), and the process is terminated. When receiving the power supply end instruction from the non-contact charging module 300, the wireless power supply unit 600 ends the power supply by the electromagnetic induction method to the mobile communication terminal 400 (step S160).

  In the above example, the length L from the inlet En to the outlet Ex of the concave groove S is not particularly mentioned. However, for example, the power supply capability of the wireless power supply unit 600 or the wireless power supply unit 600 to the contactless charging module The length L may be determined in accordance with the amount of power supplied to 300 or the like. For example, the length L may be set so that the charging of the battery 310 can be completed about 80% before the mobile communication terminal 400 passes from the entrance En to the exit Ex of the recessed groove S.

B. Modification (1) In the above-described embodiment, the relevance between the operation of the information management function and the operation of the non-contact charging function is not particularly mentioned, but the relevance may be given as follows. For example, registered user authentication is performed based on ID-related information read by the reader / writer 500, and power supply from the wireless power supply unit 600 to the contactless charging module 300 is started only when the registered user authentication is successful. . With this configuration, it is possible to easily realize non-contact power supply to registered users.

(2) In the above-described embodiment, the case where the contactless communication IC module 200 and the contactless charging module 300 are mounted on the upper body 401a of the mobile communication terminal 400 has been described (see FIG. 3). As shown, the non-contact communication IC module 200 may be built in the front side of the main body lower portion 401b of the mobile communication terminal 400, and the electromagnetic shield 750 may be provided on the rear side of the main body lower portion 401b. In this case, the non-contact charging module 300 may be built into the back side of the main body upper portion 401a of the mobile communication terminal 400, for example. Thus, the non-contact communication antenna 200 is provided on one surface side of the mobile communication terminal 400, and the electromagnetic shield 750 is provided between the non-contact communication antenna 200 and the other surface side (the back side of the main body upper portion 401a). It may be provided.

(2) In the present embodiment described above, the configuration in which the reader / writer 500 and the wireless power supply unit 600 are arranged in the horizontal direction (Y-axis direction shown in FIG. 8A) as shown in FIG. 8A is exemplified. As shown, the reader / writer 500 and the wireless power supply unit 600 may be arranged in the vertical direction (Z direction shown in FIG. 8B). Note that the positions of the reader / writer 500 and the wireless power supply unit 600 may be interchanged.

(3) In the present embodiment described above, the reader / writer 500 and the wireless power supply unit 600 have the same length L (see FIG. 5). For example, as shown in FIG. L1 may be set shorter than the length L2 of the wireless power supply unit 600. The length L1 of the reader / writer 500 may be set to a length (minimum length) at which data communication with the non-contact communication IC module 200 can be completed, for example. Note that the minimum length may be obtained in advance by experiments or the like.

  Alternatively, a plurality of reader / writers 500 and wireless power supply units 600 may be prepared, and an information / power transmission unit 700 may be formed in a plurality of reader / writers 500 and wireless power supply units 600 arranged in a staggered manner as shown in FIG. good.

  According to such a configuration, the user does not need to consider whether the front surface (or the back surface) of the main body 401a of the mobile communication terminal 400 is directed to the communication surface of the reader / writer 500 or the wireless power supply unit 600. Compared with the information / power transmission unit 00 according to the embodiment, the user can use the system more easily.

  In addition, the steps of the processes shown in the present embodiment can be executed in any order or in parallel within a range where no contradiction occurs in the process contents. Further, in this specification and the like, the term “means” does not simply mean a physical means, but also includes a case where the functions of the means are realized by software. Furthermore, the function of one means may be realized by two or more physical means, or the functions of two or more means may be realized by one physical means. The software according to the present invention can be installed on a computer by downloading it through various recording media such as an optical disk such as a CD-ROM or DVD-ROM, a magnetic disk, or a semiconductor memory, or via a communication network. Can be loaded.

DESCRIPTION OF SYMBOLS 100 ... Non-contact information management and charging system, 200 ... Non-contact communication IC module, 210 ... Secondary battery for chip | tip, 220 ... IC chip, 230 ... Antenna coil for non-contact communication, 300 ... Non-contact charge module, 310 DESCRIPTION OF SYMBOLS ... Battery 320 ... Power receiving coil 330 ... Charge control circuit 400 ... Portable communication terminal 410 ... Control unit 420 ... Display unit 430 ... Communication unit 500 ... Reader / writer 600 ... Wireless power supply unit 700 ... Information / power transmission unit, 750 ... Electromagnetic shield.

Claims (5)

A portable communication terminal having a contactless communication IC module including a contactless communication antenna and a contactless charging module including a power receiving coil;
A reader / writer that exchanges data with the non-contact communication IC module;
A power supply device that performs non-contact charging by electromagnetic induction on the non-contact charging module;
The communication surface of the reader / writer and the power supply surface of the power supply device are arranged to face each other with a predetermined distance therebetween,
The non-contact charging module of the mobile communication terminal has a power storage device including an ultracapacitor that accumulates electric power received by the power receiving coil,
The contactless communication antenna is provided on the surface side of the casing of the mobile communication terminal on which the display unit is formed, and is on the other surface side of the casing where the power storage device is attached. Is a non-contact information management / charging system in which the power receiving coil is provided and a back panel of the display unit functioning as an electromagnetic shield is provided between the non-contact communication antenna and the power receiving coil. system. A mobile communication terminal having a contactless communication IC module including a contactless communication antenna and a contactless charging module including a power receiving coil for performing contactless charging by an electromagnetic induction method,
The non-contact communication antenna is provided on one of the two opposing surfaces of the housing of the mobile communication terminal, and the power receiving coil is provided on the other surface of the housing. A portable communication terminal, wherein an electromagnetic shield is provided between the non-contact communication antenna and the other surface side. The one surface side provided with the non-contact communication antenna is a surface side on which a display unit is formed,
The mobile communication terminal according to claim 2, wherein the electromagnetic shield is a back panel of the display unit. The non-contact charging module has a power storage device including an ultracapacitor that stores the power received by the power receiving coil,
The mobile communication terminal according to claim 2, wherein the other surface side on which the power receiving coil is provided is a surface side on which the power storage device is mounted. A reader / writer that exchanges data with the non-contact communication IC module, and a power supply device that performs non-contact charging by electromagnetic induction on the non-contact charging module,
A non-contact type information / power transmission unit in which a communication surface of the reader / writer and a power supply surface of the power supply device are arranged to face each other with a predetermined distance therebetween.

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