JP2010284065A - Power/signal transmission module, noncontact charging module, and noncontact charging and signal transmission systems - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide noncontact charging and signal transmission systems which save a space, charge a corresponding apparatus only, and obtain charging and transmission at the same time. <P>SOLUTION: The noncontact charging and signal transmission systems 10 include a power/signal transmission module 11 for portable terminals, and the like, which is provided with functions for transmitting electric power, sending and receiving signals, and processing information, and a noncontact charging module 21 for chargers, and the like, and are structured to mutually transmit electric power and send and receive signals in a noncontact manner by the electromagnetic induction. In the power/signal transmission module 11, a first power control circuit 13 for controlling the charge of a secondary battery 12 and a first signal control/information processing circuit 14 for controlling the signal transmission and reception are connected to a first coil 16 via a first separation and connection circuit 15, having the functions of separating the power transmission from and connecting it to the signal transmission and reception. In the noncontact charging module 21; a second power control circuit 23 for controlling an electric power from a power source section 22; and a second signal control/information processing circuit 24 are connected to a second coil 26 via a second separation and connection circuit 25. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power / signal transmission module, a contactless charging module, and a contactless charging and signal transmission system that perform contactless charging by sharing a coil used for wireless communication in a portable device having a wireless data communication function.

  Mobile phones equipped with an RFID function such as Felica (registered trademark) are widely used, and non-contact charging systems such as portable devices using an electromagnetic induction method mainly in the several hundred kHz band are known as the prior art. ing.

  The non-contact charging system is used for the purpose of charging a secondary battery built in a portable device to be charged, etc., in order to properly charge according to the state of the secondary battery, A technique is used in which information of the secondary battery is fed back to the primary side, that is, the charger side.

  For example, in Patent Document 1, in a non-contact charging device, a primary side current due to a state of a secondary battery serving as a load is compared with a predetermined threshold, and this is regarded as a signal from the secondary side to control charging of the battery. Is going. As in this example, the charge control signal in non-contact charging generally uses secondary side load fluctuation information instead of communication.

  Patent Document 2 uses means for changing a function notification method such as an alarm during normal operation and charging in a portable electronic device such as a portable terminal or an electronic watch. And are separated in time.

  Moreover, in patent document 3, in portable electronic devices, such as a portable terminal and an electronic timepiece, power consumption can be reduced by changing the resistance load of the coil in a state where a signal is induced on the secondary side by transmission by the primary side, As a result, the burden on the secondary side is reduced.

JP 2001-275266 A JP 2000-270486 A Japanese Patent Application Laid-Open No. 11-27489

  However, in the prior art, for example, in order to realize a device having the functions of wireless communication by electromagnetic induction and contactless power transmission, the RFID function and the first coil for the function, the charging function and the second coil for the function are provided. Although it is possible to mount each of them, the first coil is required to have a size and the number of turns corresponding to the 13.56 MHz band, and the second coil is required to have a size and the number of turns corresponding to, for example, a 125 kHz band. In a device such as a telephone terminal in which components are mounted at a very high density, it is difficult to secure a space for mounting the two different coils in addition to the antenna related to the original telephone function.

  If the coil used for electromagnetic induction is made common, such as realizing the operating frequency related to charging at 13.56 MHz together with the RFID function, space can be saved, but the communication and charging functions are mixed in one coil. In order to do this, it is necessary to separate these functions temporally by a switch or the like, and charging and communication cannot be performed simultaneously. Here, for example, there is no specific disclosure in which 13.56 MHz band information communication represented by NFC (Near Field Communication) and Felica and non-contact charging are shared by one coil.

  Furthermore, there is no disclosure example of a charging control method using an ID authentication function by communication after using a common coil in non-contact charging, and in this case, ID authentication cannot be performed between the charger and the device to be charged. If a non-compliant device or foreign object is accidentally placed in the charger, there is a risk of overheating.

  In addition, even if the coils are shared, charging and communication are temporally separated, or even if they are temporally simultaneous, the charging and communication coils are spatially separated from each other. It was.

  Alternatively, if the coil used for electromagnetic induction is shared, such as when the operating frequency related to charging is realized at 13.56 MHz in combination with the RFID function, the communication and charging functions can be combined in one coil. Therefore, there is a problem that these functions must be temporally separated by a switch or the like.

  The present invention solves the above-mentioned problems, can save space, and can be charged only to a compatible device, and further can be charged and communicated simultaneously, a power / signal transmission module, a non-contact charging module, and It is to provide a non-contact charging and signal transmission system.

  The present invention has been made in order to solve the above-mentioned problems, and can save space by sharing a coil used for data communication and non-contact charging such as RFID, and can charge only corresponding devices by ID authentication. Furthermore, a non-contact charging and signal transmission system capable of simultaneously charging and communicating is realized.

  That is, according to the present invention, there is provided a power / signal transmission module for a portable device having a power transmission function, a signal transmission / reception function, and an information processing function, which is a first for controlling charging of a secondary battery or a load circuit. Power control circuit, a first signal control / information processing circuit for controlling signal transmission / reception, and a first separation / coupling circuit for separating and coupling power transmission and signal transmission / reception, Both the power control circuit and the first signal control / information processing circuit are connected to the first coil through the first separation / coupling circuit, thereby obtaining a power / signal transmission module. .

  Further, according to the present invention, the basic drive signal is connected to the first power control circuit and the first signal control / information processing circuit, and forms a carrier wave for power transmission and signal transmission / reception in synchronization with each other. The power / signal transmission module described above is provided, characterized in that the first oscillator for generating the first oscillator is provided.

  According to the present invention, there is also provided a non-contact charging module having a power transmission function, a signal transmission / reception function, and an information processing function, the second power control circuit for controlling the power from the power supply unit, and the signal transmission / reception. A second signal control / information processing circuit for controlling the power, and a second separation / coupling circuit for separating / combining power transmission and signal transmission / reception, the second power control circuit and the second Together with the signal control / information processing circuit, a non-contact charging module is obtained which is connected to the second coil through the separation / coupling circuit.

  According to the present invention, the basic drive signal is connected to the second power control circuit and the second signal control / information processing circuit, and forms a power transmission and signal transmission / reception carrier in synchronization with each other. The above-described non-contact charging module is provided, which includes a second oscillator that generates

  Further, according to the present invention, the power / signal transmission module and the non-contact charging module described above are configured to transmit power in a non-contact manner by electromagnetic induction through the first coil and the second coil, respectively. A contactless charging and signal transmission system characterized by transmitting and receiving signals is obtained. That is, a power / signal transmission module having a common oscillator for synchronizing drive of power transmission and signal transmission / reception, a power / signal transmission module having no oscillator, a non-contact charging module having an oscillator, and an oscillator Four sets of non-contact charging and signal transmission systems are obtained in combination with a non-contact charging module that does not have.

  According to the present invention, when the ID of the power / signal transmission module is registered in the contactless charging module and the power / signal transmission module is disposed on the contactless charging module, The above-mentioned authentication function that performs data communication by contact communication, identifies the ID of the power / signal transmission module, and has an authentication function that starts charging only when the ID matches the ID registered in the non-contact charging module in advance. A contact charging and signal transmission system is obtained. That is, in this case as well, a power / signal transmission module having a common oscillator for synchronizing drive of power transmission and signal transmission / reception, a power / signal transmission module having no oscillator, and a non-contact charging module having an oscillator In combination with a non-contact charging module having no oscillator, four sets of non-contact charging and signal transmission systems can be obtained.

  According to the present invention, it is possible to obtain the contactless charging and signal transmission system described above, wherein the voltage waveform excited in the first coil at the time of power transmission and reception is the same.

  Further, according to the present invention, it is possible to obtain the above-described non-contact charging and signal transmission system, wherein signal transmission / reception is data communication using a frequency of 13.56 MHz band.

  The power / signal transmission / reception module, non-contact charging module, and non-contact charging / signal transmission system of the present invention can save space by sharing a coil used for data communication and non-contact charging such as RFID, and support by ID authentication Only the device can be charged, and charging and communication can be realized simultaneously.

  In other words, without adding a new charging coil, it can be shared with a data communication coil for non-contact charging, can be charged by performing ID authentication, and charging and communication can be realized simultaneously. Therefore, it is possible to realize a non-contact charging system that can be safely charged by simply placing it.

  Specifically, it is a non-contact charging system using 13.56 MHz band and using electromagnetic induction, and a coil used in wireless data communication such as Felica or NFC is used as a charging coil. Charging and communication use the same voltage waveform, and they are identical in time and space. Furthermore, it has an ID authentication function, and when performing non-contact charging, it can charge only the authenticated device and can safely identify the charging counterpart by the ID authentication method utilizing the communication function. .

1 is a schematic diagram of a contactless charging and signal transmission system according to Embodiment 1 of the present invention. FIG. 1 is a schematic diagram of a power / signal transmission module for portable devices according to Embodiment 1 of the present invention. FIG. The schematic diagram of the non-contact charge module concerning Embodiment 1 of the present invention. The figure which shows the voltage operation waveform which generate | occur | produces at the coil both ends of the non-contact charge and signal transmission system which concern on Embodiment 1 of this invention. The figure which shows the voltage operation | movement waveform which generate | occur | produces at the both ends of the coil in the non-contact charge system of a prior art example. The figure which shows the voltage operation | movement waveform which generate | occur | produces at the both ends of the coil in the non-contact charge system of another prior art example. Schematic of the non-contact charge and signal transmission system which concerns on Embodiment 2 of this invention. Schematic of the non-contact charge and signal transmission system which concerns on Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a schematic diagram of a contactless charging and signal transmission system according to Embodiment 1 of the present invention. As shown in FIG. 1, the contactless charging and signal transmission system 10 according to the first embodiment of the present invention includes a power / signal transmission module 11 such as a portable terminal and a contactless charging module 21 such as a charger. The power transmission and the signal transmission / reception are performed in a non-contact manner by electromagnetic induction through each coil, that is, the first coil 16 and the second coil 26.

  FIG. 2 shows a schematic diagram of a power / signal transmission module for portable equipment according to Embodiment 1 of the present invention. As shown in FIG. 2, the power / signal transmission module 11 for portable devices has a power transmission function, a signal transmission / reception function, and an information processing function, respectively, for controlling charging of the secondary battery 12 or other load circuit. Both the first power control circuit 13 and the first signal control / information processing circuit 14 for controlling signal transmission / reception have a function of separating and combining power transmission and signal transmission / reception. 15 is commonly connected to both ends of the first coil 16 which is a single coil.

  FIG. 3 shows a schematic diagram of the contactless charging module according to Embodiment 1 of the present invention. As shown in FIG. 3, the non-contact charging module 21 includes a power transmission function, a signal transmission / reception function, and an information processing function, respectively, a power supply unit 22, a second power control circuit 23 for controlling the power supply unit 22, a signal And a second signal control / information processing circuit 24 for controlling transmission / reception, both of which are connected to a single coil via a second separation / coupling circuit 25 having a function of separating and coupling power transmission and signal transmission / reception. Are commonly connected to both ends of the second coil 26.

  Next, specific examples of the present invention will be described by focusing on the charging and signal waveforms in the operation state of the non-contact charging and signal transmission system. The configuration of the system is the configuration shown in FIG. 1, and the specific operating frequency is 13.56 MHz assuming NFC, which is also the frequency related to charging.

  FIG. 4 shows voltage operation waveforms generated at both ends of the coil of the contactless charging and signal transmission system according to Embodiment 1 of the present invention. The same coil is shared for charging and data communication, and they are implemented at the same frequency.

  As shown in FIG. 4, the voltage waveform 61 is a voltage waveform applied to both ends of the coil involved in RFID data communication, and is also a transmission voltage waveform for charging. In other words, these voltage waveforms are also shared, and the voltage waveforms excited in the transmission coils involved in power transmission and signal transmission / reception are the same. At time T1, neither data communication nor charging is performed, and the state is off. Here, at the start of charging, the individual ID of the device to be charged registered in the charging module in advance and the ID of the device to be charged are collated. In this case, ID authentication is performed by performing data communication by non-contact communication, and charging is started when a condition such as matching with an ID registered in advance in a non-charging device is satisfied. Time T2 indicates a modulation waveform in which both data communication and charging are performed after the authentication is confirmed, and data is superimposed on a 13.56 MHz carrier wave. Time T3 is a state in which only charging is performed. Here, there is no modulation waveform associated with data communication. At time T4, both are off.

  In this way, the same coil is shared for charging and data communication, and the power transmission and the signal transmission / reception are separated and combined with each other in order to execute simultaneously in time and space. Commonly connected to both ends of the coil. For this reason, charging is possible even during communication using the same coil.

  FIG. 5 shows voltage operation waveforms generated at both ends of the coil in the conventional contactless charging system. As shown in FIG. 5, a voltage waveform 41 is a voltage waveform applied to both ends of a coil involved in RFID data communication, and a voltage waveform 42 is a transmission voltage waveform for charging. At time T1, neither data communication nor charging is performed, and the state is off. At time T2, data communication and charging are performed at the same time, data communication of the voltage waveform 41 shows a modulation waveform in which data is superimposed on a carrier wave of 13.56 MHz, and charging of the voltage waveform 42 is performed at an operating frequency of 125 kHz. ing. These are made by different networks and coils. At time T3, only charging is performed. At time T4, both are off.

  FIG. 6 shows voltage operation waveforms generated at both ends of a coil in another conventional non-contact charging system. This is a case where the same coil is shared for charging and data communication, and these are implemented in the same frequency band.

  As shown in FIG. 6, a voltage waveform 51 is a voltage waveform applied to both ends of a coil involved in RFID data communication, and a voltage waveform 52 is a transmission voltage waveform for charging. At time T1, neither data communication nor charging is performed, and the state is off. At time T2, data communication is performed, and the data communication of the voltage waveform 51 shows a modulation waveform in which data is superimposed on a 125 kHz carrier wave. Time T3 is a state in which only charging is performed. At time T4, both are off.

  As described above, in the conventional example, in order to share the same coil for charging and data communication, timings for executing charging and data communication are separated in terms of time.

(Embodiment 2)
Next, another embodiment will be described. FIG. 7 shows a schematic diagram of a contactless charging and signal transmission system according to Embodiment 2 of the present invention. As shown in FIG. 7, the non-contact charging and signal transmission system 70 according to the second embodiment includes a power / signal transmission module 71 such as a portable terminal and a non-contact charging module 81 such as a charger, as in FIG. 1. The power transmission and the signal transmission / reception are performed in a non-contact manner by electromagnetic induction through the respective coils, the first coil 76, and the second coil 86.

  A power / signal transmission module 71 for a portable device has a power transmission function, a signal transmission / reception function, and an information processing function, respectively, and a first power control circuit 73 for controlling charging of the secondary battery 72 or other load circuit. And a first signal control / information processing circuit 74 for controlling signal transmission / reception, and a single coil via a first separation / coupling circuit 75 having a function of separating and coupling power transmission and signal transmission / reception. Are commonly connected to both ends of the first coil 76.

  The non-contact charging module 81 having a power transmission function, a signal transmission / reception function, and an information processing function respectively controls a power supply unit 82, a second power control circuit 83 for controlling the power supply unit 82, and signal transmission / reception. The second signal control / information processing circuit 84 is a single coil through a second separation / coupling circuit 85 having a function of separating and coupling power transmission and signal transmission / reception. The coil 86 is commonly connected to both ends. These constitute a non-contact charging and signal transmission system 70 in which electric power transmission and signal transmission / reception are performed in a non-contact manner by electromagnetic induction through the first coil 76 and the second coil 86, respectively. Here, the oscillator 88 is connected to the second power control circuit 83 and the second signal control / information processing circuit 84. Carrier waves related to the power transmission and the signal transmission / reception are formed in synchronization with each other by a basic drive signal generated by a common oscillator 88. In the case of this example, as in the first embodiment, the same coil is shared for charging and data communication, and the function of separating and combining power transmission and signal transmission / reception is performed in order to execute simultaneously in time and space. Since it is commonly connected to both ends of a single coil via a separate coupling circuit, the same coil can be charged during communication.

(Embodiment 3)
Next, another embodiment will be described. FIG. 8 shows a schematic diagram of a contactless charging and signal transmission system according to Embodiment 3 of the present invention. As shown in FIG. 8, the non-contact charging and signal transmission system 90 according to the third embodiment includes a power / signal transmission module 91 such as a portable terminal and a non-contact charging module such as a charger, as in FIGS. 101, and is configured to transmit power and transmit / receive signals in a non-contact manner by electromagnetic induction with each other through the respective coils, the first coil 96, and the second coil 106.

  The power / signal transmission module 91 for portable devices has a power transmission function, a signal transmission / reception function, and an information processing function, respectively, and a first power control circuit 93 for controlling charging of the secondary battery 92 or other load circuit. And a first signal control / information processing circuit 94 for controlling signal transmission / reception, and a single coil via a first separation / coupling circuit 95 having a function of separating and coupling power transmission and signal transmission / reception. Are commonly connected to both ends of the first coil 96. The first oscillator 98 is connected to the first power control circuit 93 and the first signal control / information processing circuit 94.

  The non-contact charging module 101 having a power transmission function, a signal transmission / reception function, and an information processing function respectively controls the power supply unit 102, the second power control circuit 103 for controlling the power supply unit 102, and signal transmission / reception. The second signal control / information processing circuit 104 is a single coil via a second separation / coupling circuit 105 having a function of separating and coupling power transmission and signal transmission / reception. The coil 106 is commonly connected to both ends. The second oscillator 108 is connected to the second power control circuit 103 and the second signal control / information processing circuit 104. These constitute a non-contact charging and signal transmission system 90 in which electric power transmission and signal transmission / reception are performed in a non-contact manner by electromagnetic induction through the first coil 96 and the second coil 106, respectively. Here, the carrier waves related to the power transmission and the signal transmission / reception are formed in synchronism with each other by a common basic drive signal generated by the first oscillator 98 and the second oscillator 108. In the case of this example, as in the first and second embodiments, the same coil is shared for charging and data communication, and power transmission and signal transmission / reception are separated and combined for simultaneous execution in time and space. Since it is commonly connected to both ends of a single coil through a separate coupling circuit having a function, charging can be performed even during communication using the same coil.

  In addition to the above example, a non-contact charging and signal transmission system can be configured by a combination of a power / signal transmission module having an oscillator and a non-contact charging module having no oscillator.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a device capable of non-contact charging at a frequency of, for example, 13.56 MHz band by sharing a coil used for communication in a device having a wireless data communication function such as Felica or NFC.

10, 70, 90 Contactless charging and signal transmission system 11, 71, 91 Power / signal transmission module 12, 72, 92 Secondary battery 13, 73, 93 First power control circuit 14, 74, 94 First signal Control / information processing circuit 15, 75, 95 First separation / coupling circuit 16, 76, 96 First coil 21, 81, 101 Non-contact charging module 22, 82, 102 Power supply unit 23, 83, 103 Second power Control circuit 24, 84, 104 Second signal control / information processing circuit 25, 85, 105 Second separation / coupling circuit 26, 86, 106 Second coil 41 (applied to both ends of coil related to RFID data communication) Waveform 42 (Transmission for charging) Voltage waveform 51, 61 Voltage waveform 52 (applied to both ends of the coil involved in RFID data communication) 52 Transmission voltage wave (for charging) 88,108 (second) oscillator 98 first oscillator

Claims (14)

  A power / signal transmission module for a portable device having a power transmission function, a signal transmission / reception function, and an information processing function, the first power control circuit for controlling a charging or load circuit of a secondary battery, and signal transmission / reception A first signal control / information processing circuit for controlling the power transmission and a first separation / coupling circuit for separating and coupling power transmission and signal transmission / reception, the first power control circuit and the first The signal control / information processing circuit is connected to the first coil via the first separation / coupling circuit.   A first oscillator that is connected to the first power control circuit and the first signal control / information processing circuit and generates a basic drive signal for generating a carrier wave for power transmission and signal transmission / reception in synchronization with each other The power / signal transmission module according to claim 1, further comprising:   A contactless charging module having a power transmission function, a signal transmission / reception function, and an information processing function, a second power control circuit for controlling power from the power supply unit, and a second power control circuit for controlling signal transmission / reception A signal control / information processing circuit; and a second separation / coupling circuit for separating / combining power transmission and signal transmission / reception, wherein the second power control circuit and the second signal control / information processing circuit are Both of them are connected to the second coil through the separation and coupling circuit.   A second oscillator connected to the second power control circuit and the second signal control / information processing circuit to generate a basic drive signal for forming power transmission and signal transmission / reception carrier waves in synchronization with each other The contactless charging module according to claim 3, further comprising:   The power / signal transmission module according to claim 1 and the non-contact charging module according to claim 3, each of which is non-contact power by electromagnetic induction via the first coil and the second coil. A contactless charging and signal transmission system characterized by transmitting and transmitting and receiving signals.   The power / signal transmission module according to claim 1 and the non-contact charging module according to claim 4, each of which is non-contact power by electromagnetic induction via the first coil and the second coil. A contactless charging and signal transmission system characterized by transmitting and transmitting and receiving signals.   A power / signal transmission module according to claim 2 and a non-contact charging module according to claim 3, each of which is non-contact power by electromagnetic induction via the first coil and the second coil. A contactless charging and signal transmission system characterized by transmitting and transmitting and receiving signals.   The power / signal transmission module according to claim 2 and the non-contact charging module according to claim 4, each of which is non-contact power by electromagnetic induction via the first coil and the second coil. A contactless charging and signal transmission system characterized by transmitting and transmitting and receiving signals.   The ID of the power / signal transmission module according to claim 1 is registered in the non-contact charging module according to claim 3, and the power / signal transmission according to claim 1 is registered on the non-contact charging module according to claim 3. When the module is arranged, data communication is performed by non-contact communication, the ID of the power / signal transmission module according to claim 1 is identified, and the ID registered in the non-contact charging module according to claim 3 in advance The non-contact charging and signal transmission system according to claim 5, further comprising an authentication function that starts charging only when they match.   The ID of the power / signal transmission module according to claim 1 is registered in the non-contact charging module according to claim 4, and the power / signal transmission according to claim 1 is registered on the non-contact charging module according to claim 4. When the module is arranged, data communication is performed by non-contact communication, the ID of the power / signal transmission module according to claim 1 is identified, and the ID registered in the non-contact charging module according to claim 4 in advance The non-contact charging and signal transmission system according to claim 6, further comprising an authentication function for starting charging only when they match.   The ID of the power / signal transmission module according to claim 2 is registered in the non-contact charging module according to claim 3, and the power / signal transmission according to claim 2 is registered on the non-contact charging module according to claim 3. When the module is arranged, data communication is performed by non-contact communication, the ID of the power / signal transmission module according to claim 2 is identified, and the ID registered in the non-contact charging module according to claim 3 in advance The non-contact charging and signal transmission system according to claim 7, further comprising an authentication function for starting charging only when they match.   The ID of the power / signal transmission module according to claim 2 is registered in the non-contact charging module according to claim 4, and the power / signal transmission according to claim 2 is registered on the non-contact charging module according to claim 4. When the module is arranged, data communication is performed by non-contact communication, the ID of the power / signal transmission module according to claim 2 is identified, and the ID registered in the non-contact charging module according to claim 4 in advance The contactless charging and signal transmission system according to claim 8, further comprising an authentication function for starting charging only when the two match.   The contactless charging and signal transmission system according to any one of claims 5 to 12, wherein a voltage waveform excited by the first coil during signal transmission / reception during power transmission is the same.   14. The non-contact charging and signal transmission system according to claim 5, wherein the signal transmission / reception is data communication using a frequency of 13.56 MHz band.

Images