WO2013073081A1 - 近接無線通信を用いて媒体検出を行う通信装置、外部媒体、および外部媒体通信システム - Google Patents
近接無線通信を用いて媒体検出を行う通信装置、外部媒体、および外部媒体通信システム Download PDFInfo
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- WO2013073081A1 WO2013073081A1 PCT/JP2012/005288 JP2012005288W WO2013073081A1 WO 2013073081 A1 WO2013073081 A1 WO 2013073081A1 JP 2012005288 W JP2012005288 W JP 2012005288W WO 2013073081 A1 WO2013073081 A1 WO 2013073081A1
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- antenna
- card
- external medium
- communication device
- detection
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- 238000001514 detection method Methods 0.000 title claims abstract description 242
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
- H04B5/266—One coil at each side, e.g. with primary and secondary coils
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
- H04B5/263—Multiple coils at either side
Definitions
- the present invention relates to a technology capable of detecting attachment of an external medium represented by a memory card.
- an interface for accessing such an external medium is generally a wired connection, a wireless connection is also used.
- Patent Document 1 As a device for detecting an external medium in wireless connection, there is one using a proximity sensor such as an infrared sensor (see, for example, Patent Document 1).
- the noncontact card confirmation device of Patent Document 1 detects that the noncontact card is in proximity to the noncontact card confirmation device by an infrared sensor.
- connection means with the external medium is wired or wireless
- the external medium communication device can reliably determine whether communication with the external medium is possible.
- the present invention provides an external medium communication system comprising an external medium communication device and an external medium which can determine whether the external medium can communicate and accurately detect the position thereof. To aim.
- the external medium communication system is an external medium communication system comprising an external medium and a communication device for communicating with the external medium, wherein the external medium is a first coil, and a second coil.
- a conductor portion including a wiring portion connecting one end of the first coil to one end of the second coil and connecting the other end of the first coil to the other end of the second coil;
- the communication device includes an external medium detection antenna unit including a coiled first antenna and a coiled second antenna, a current supply unit for supplying a current to the first antenna, and the first An external medium detection unit that detects that an antenna and the second antenna are coupled by electromagnetic induction through the conductor unit by an induced electromotive force generated in the second antenna, and the wiring unit and the external medium detection unit
- the external medium detection unit is When the external medium is mounted at a fixed position, the first antenna and the first coil face each other, and the second antenna and the second coil face each other. It is characterized by
- the communication device can detect that the external medium is mounted at the fixed position, whereby the object facing the detection antenna unit is the external medium, and communication with the external medium It can detect that it can communicate with the device.
- a perspective view of the external medium communication system in the first embodiment of the present invention The figure which shows the operation
- curd communication apparatus detects insertion of a noncontact card
- curd is in a fixed position in the external-medium communication system in Embodiment 1 of this invention.
- FIG. 1 Flowchart showing the operation of the card communication device in the external medium communication system in the first embodiment of the present invention
- curd is in a fixed position in the external-medium communication system in Embodiment 2 of this invention.
- curd is taken out from a card
- the communication device may transmit radio waves to a space where the external medium does not exist unless the communication device detects the external medium in any way (including the notification by the user).
- the proximity of the external medium to the communication device is detected by the infrared sensor.
- the communication device of Patent Document 1 transmits radio waves to the object even if the object is merely out of paper, for example. Try wireless communication. That is, with the technique of Patent Document 1, it is not possible to selectively detect only the external medium before starting wireless communication.
- the external medium is detected by a detection switch, an optical sensor or the like, for example, by providing a detection switch at the deepest part of a card slot which is an interface.
- the surface area of the external medium that can be used as the contact terminal is reduced, and the tolerance of positional deviation at the contact is reduced.
- the increase in the capacity of the external medium is expected to increase the number of terminals with the increase in the amount of data transfer, so the surface area per terminal may be further reduced.
- the detection method of the external medium using the detection switch or the optical sensor it can not be detected whether the external medium is displaced or not, and even if the external medium is displaced and contact failure occurs, There is a possibility that the external medium is erroneously detected as being communicable. Therefore, there is a problem that the communication device attempts to access the external medium through the interface causing the contact failure, and trouble such as communication abnormality or short between contacts may occur.
- a non-external medium for example, a dummy card
- a non-external medium does not have a coil for magnetic field coupling and is not detected by the communication device, so that it is possible to prevent a non-external medium from being erroneously recognized as an external medium.
- the positional displacement allowance in magnetic field coupling by the coil is small as about the diameter of the coil, if the external medium is detected based on whether magnetic coupling using the coil having a diameter of the positional displacement tolerance is established or not If there is a positional deviation exceeding the positional deviation allowable amount, control can be performed such that communication is not started without detecting the external medium, and position detection of the external medium can be performed with high accuracy. Furthermore, two sets of magnetic field coupling are created between the external medium and the communication device, and the external medium directly couples the two coils and transmits the signal received by one magnetic field coupling as it is by the other magnetic field coupling. There are two effects below.
- the position detection can be performed at two locations of the external medium, so that the accuracy of the position detection can be improved.
- the external medium only needs to have two coupled coils without the need for a component that controls magnetic field coupling. , Succeeds in simplifying the structure of the external medium.
- FIG. 1 is an outline of the external medium communication system in the first embodiment of the present invention.
- the external medium communication system in the first embodiment is configured of a noncontact card 100 and a card communication device 200.
- the non-contact card 100 is an external medium that exchanges data by communicating with the card communication device 200 by being inserted into a fixed position of a card slot of the card communication device 200 which is a communication device.
- the card communication device 200 detects that the non-contact card 100 is inserted in the card slot as described later, and starts an operation of detecting whether the non-contact card 100 exists in a fixed position, By detecting the presence of the mold card 100 in a fixed position, communication is performed by close proximity wireless communication using magnetic coupling between the noncontact card 100 and the coiled antenna. Further, the card communication device 200 terminates communication with the noncontact card 100 by detecting that the noncontact card 100 is no longer present at the fixed position, and the noncontact card 100 is present at the fixed position. The detection operation of whether or not also ends.
- FIG. 2 is a diagram showing an operation in which the non-contact card 100 of the external medium communication system in the first embodiment is detached from the card communication device 200.
- the non-contact type card 100 is, for example, a memory card, and includes a magnetic material wiring unit 120, a communication antenna unit 130, and a card-side LSI unit 110.
- the magnetic material wiring portion 120 is configured of the wiring 123, the magnetic material pad 121, and the magnetic material pad 122.
- Each of the magnetic pads 121 and 122 is a coil-shaped permanent magnet having a diameter of about 1 mm, which is formed by forming a conductive ferromagnetic material represented by, for example, iron oxide or cobalt into a winding and magnetizing it.
- the magnetic pad 121 is disposed so as to face the detection output antenna 221 and the magnetic pad 122 faces the detection input antenna 222. ing.
- the wiring 123 is a conductive wire made of a conductor such as copper, for example, and one end of the coil of the magnetic pad 121 and one end of the coil of the magnetic pad 122 are the same as the other end of the coil of the magnetic pad 121 and the magnetic pad 122 And the other end of the coil of.
- the magnetic wiring portion 120 forms a closed circuit, and when an induced electromotive force is generated in the magnetic pad 121, a current circulating in the magnetic wiring portion 120 flows, and a magnetic field by electromagnetic induction flows in the magnetic pad 122 Occur.
- the communication antenna unit 130 includes a card input antenna 131 and a card output antenna 132.
- the non-contact card 100 performs close proximity wireless communication by magnetic field coupling with the card communication device 200 using the card-side input antenna 131 and the card-side output antenna 132.
- the card-side input antenna 131 and the card-side output antenna 132 are coiled antennas each having a diameter of about 1 mm, and when the noncontact card 100 and the card communication device 200 are in the above-described positional relationship, the card side
- the input antenna 131 is disposed to face the host-side output antenna 231
- the card-side output antenna 132 is disposed to face the host-side input antenna 232, respectively.
- the card-side input antenna 131 outputs a signal received from the card communication device 200 to the card-side LSI 110 by inductive coupling with the host-side output antenna 231, and the card-side output antenna 132 by inductive coupling with the host-side input antenna 232
- the signal from the LSI 110 is transmitted to the card communication device 200. The description of the operation will be described later.
- the card side LSI 110 is configured of a card side controller 111, a card side reception circuit 112, and a card side transmission circuit 113.
- the card-side receiving circuit 112 converts a signal received by the card-side input antenna 131 from the card communication device 200 into a data signal and outputs the data signal to the card-side controller 111.
- the card-side transmission circuit 113 converts a data signal from the card-side controller 111 into a signal to be sent to the card communication device 200 and outputs the signal to the card-side output antenna 132.
- the card controller 111 outputs data to the card transmitter 113 in response to the data signal from the card receiver 112. For example, if the data signal from the card-side receiving circuit 112 indicates a read operation of a memory (not shown) provided in the non-contact card 100, it includes data read from the memory (not shown). The data signal is output to the card transmission circuit 113.
- the card communication device 200 communicates with the contactless card 100 and is, for example, a memory card reader / writer.
- the card communication device 200 is a host-side LSI 210, a detection antenna unit 220, a communication antenna unit 230, and a guide lane 240. Configured
- the host-side LSI 210 is configured of a host-side controller 211, a host-side reception circuit 213, a host-side transmission circuit 214, and a card detection circuit 212.
- the host-side reception circuit 213 converts a signal received by the communication antenna unit 230 from the non-contact card 100 into a data signal and outputs the data signal to the host-side controller 211.
- the host-side transmission circuit 214 converts the data signal from the host-side controller 211 into a signal to be sent to the noncontact card 100 and outputs the signal to the communication antenna unit 230.
- the host-side controller 211 performs a data signal delivery operation between the host-side receiving circuit 213 and the host-side transmitting circuit 214 according to a program held internally. For example, if the program is a memory read of the noncontact card 100, a data signal indicating a read operation is output to the host transmission circuit 214, and the contents of the memory held by the noncontact card 100 from the host reception circuit 213. Operation to wait for the input of a data signal containing.
- the card detection circuit 212 analyzes the signal from the detection antenna unit 220, and notifies the host-side controller 211 whether or not the noncontact card 100 is being inserted into the card slot of the card communication device 200. Do. In addition, when the card detection circuit 212 detects that the noncontact card 100 is being inserted into the card slot of the card communication device 200, it is detected that the noncontact card 100 is removed. In the meantime, a signal is output to the detecting antenna unit 220, the signal from the detecting antenna unit 220 is analyzed, and the host side controller 211 is notified whether the non-contact card 100 is in a fixed position.
- the signal that the card detection circuit 212 outputs to the detection antenna unit 220 is, for example, a pulse current.
- the host-side controller 211 controls communication in accordance with the input from the card detection circuit 212. For example, in order to reduce power consumption, control is performed not to output a data signal to the host-side transmission circuit 214 or to not respond to a data signal from the host-side reception circuit 213 until there is an input from the card detection circuit 212. .
- the detection antenna unit 220 includes a detection output antenna 221 and a detection input antenna 222.
- the detection output antenna 221 is a coiled antenna with a diameter of about 1 mm, and transmits the signal input from the card detection circuit 212 to the noncontact card 100.
- the detection input antenna 222 is a coiled antenna with a diameter of about 1 mm, and outputs to the card detection circuit 212 an induced current signal generated by passing or facing the magnetic material wiring portion 120 as described later.
- the communication antenna unit 230 includes a host-side output antenna 231 and a host-side input antenna 232.
- the host-side output antenna 231 is a coiled antenna with a diameter of about 1 mm, and transmits a signal input from the host-side transmission circuit 214 to the noncontact card 100 by inductive coupling with the card-side input antenna 131.
- the host-side input antenna 232 is a coiled antenna with a diameter of about 1 mm, and outputs a signal received from the noncontact card 100 to the host-side receiving circuit 213.
- the guide lane 240 guides the non-contact card 100 to a fixed position for communicating with the card communication device 200.
- the card communication device 200 For example, it is a card slot portion of an SD card reader.
- the noncontact card 100 when the noncontact card 100 is inserted into or removed from the card communication device 200, the nonmagnetic card wiring portion 120 of the noncontact card 100 moves along the guide lane 240. Pass over the detection antenna unit 220 of FIG.
- the communication antenna unit 130 of the noncontact card 100 and the communication antenna unit 230 of the card communication device 200 face each other.
- the card detection operation of the card detection circuit 212 is shown on the left side of FIG. 6, and the communication operation of the host controller 211 is shown on the right side of FIG.
- FIG. 3 is a view showing the contactless card 100 being inserted into the card communication device 200.
- the direction of movement of the noncontact card 100 is determined by the guide lane 240, so the magnetic material pad 121 is a card It passes above the detection input antenna 222 of the communication device 200. At this time, as shown in FIG.
- the magnetic material pad 121 which is a magnet
- the detection input antenna 222 which is a conducting wire wound in a coil shape, so the magnetic field generated by the magnetic material pad 121 is After passing through the detection input antenna 222, an induced current generated in the detection input antenna 222 flows to the card detection circuit 212 from the principle of electromagnetic induction.
- FIG. 4 is a diagram showing that the non-contact card 100 of the external medium communication system in the first embodiment is fixed at a fixed position of the card communication device 200.
- the card detection circuit 212 detects that the induced current flows from the detection input antenna 222 (S11)
- the noncontact card 100 is inserted into the card communication device 200. It is determined that it is in the middle, and a pulse signal of the first pattern is sent to the detection output antenna 221 (S12).
- the detection output antenna 221 generates a magnetic field by electromagnetic induction.
- the noncontact card 100 is in a position where it can communicate with the card communication device 200, the magnetic material pad 121 of the noncontact card 100 is located on the detection output antenna 221, and detection is performed.
- An electromotive force is generated on the magnetic material pad 121 by the magnetic field generated by the output antenna 221.
- a current caused by the electromotive force generated in the magnetic pad 121 flows through the magnetic pad 122.
- This current is a pulse signal of the second pattern.
- the second pattern is smaller in amplitude (maximum of the absolute value of the current) than the first pattern, and the rising edge and the falling edge become duller and unclear than the first pattern.
- the magnetic pad 122 generates a magnetic field by electromagnetic induction. In the detection input antenna 222 located below the magnetic material pad 122, an induced electromotive force is generated by the magnetic field generated by the magnetic material pad 122.
- a current caused by the induced electromotive force generated in the detection input antenna 222 flows.
- This current is a pulse signal of the third pattern.
- the third pattern is smaller in amplitude (maximum of the absolute value of the current) than the second pattern, and the rising edge and the falling edge become duller and unclear than the third pattern.
- the card detection circuit 212 when the card detection circuit 212 sends a current to the detection output antenna 221, it detects the current from the detection input antenna 222 due to the sent current. A part will be returned to the card detection circuit 212 via the noncontact card 100. If the waveform of the current from the detection input antenna 222 corresponds to the waveform of the current sent to the detection output antenna 221, the card detection circuit 212 can confirm that the power is looped back (Yes in S13) And the host controller 211 is notified that the noncontact card 100 is in a fixed position, that is, the card communication device 200 and the noncontact card 100 are in a communicable positional relationship (S14).
- the card detection circuit 212 determines that the noncontact card 100 is starting to be inserted into the card communication device 200 and an electric current flows to the detection output antenna 221, an induced current flows from the detection input antenna 222. If not, the card detection circuit 212 performs a retry process of supplying a current to the detection output antenna 221 a specific number of times. If no current flows from the detection input antenna 222 even if retry processing is performed, the card detection circuit 212 determines that the non-contact card 100 has been removed during insertion, and the card is inserted again from the detection input antenna 222 Wait for the current to flow. At this time, the card detection circuit 212 notifies nothing to the host controller 211 (S18).
- the host-side controller 211 that has received the detection notification of the noncontact card 100 from the card detection circuit 212 (Yes in S21) starts communication with the noncontact card 100 (S22).
- the host-side controller 211 outputs a data signal to the host-side transmission circuit 214, and the host-side transmission circuit 214 converts the data signal into a current and flows the current to the host-side output antenna 231.
- the host-side output antenna 231 generates a magnetic field by electromagnetic induction.
- the card-side input antenna 131 of the noncontact card 100 located above the host-side output antenna 231 causes an induced current to flow to the card-side receiving circuit 112 by the magnetic field generated by the host-side output antenna 231.
- the card side reception circuit 112 converts the induced current into a data signal and inputs the data signal to the card side controller 111.
- the card-side controller 111 analyzes the data signal from the card-side receiving circuit 112, and outputs a data signal corresponding thereto to the card-side transmitting circuit 112.
- the card side transmission circuit 112 converts the data signal into a current and outputs the current to the card side output antenna 132.
- the card side output antenna 132 generates a magnetic field by electromagnetic induction.
- the host-side input antenna 232 of the card communication device 200 located below the card-side output antenna 132 causes an induced current to flow to the host-side reception circuit 213 by the magnetic field generated by the card-side output antenna 132.
- the host side reception circuit 213 converts the induced current into a data signal and outputs the data signal to the host side controller 211.
- the card detection circuit 212 continues to flow the current to the detection output antenna 221, and the induction current flows from the detection input antenna 222, that is, is there a loopback through the noncontact card 100? It keeps on monitoring whether or not it is not (S15).
- the magnetic material pad 121 of the noncontact card 100 is the detection output antenna 221 of the card communication device 200 and the magnetic material pad 122. Is no longer opposed to the detection input antenna 222, the power sent out by the card detection circuit 212 of the noncontact card 100 as a current to the detection output antenna 221 is returned from the detection input antenna 222 as an induced current. Loopback is broken. At this time, the card detection circuit 212 determines that the non-contact card 100 is starting to be removed from the card communication device 200 (No in S15).
- the noncontact card 100 is taken out of the card communication device 200, the direction of movement of the noncontact card 100 is determined by the guide lane 240. Therefore, the magnetic material pad 121 of the noncontact card 100 performs card communication It passes above the detection input antenna 222 of the device 200. At this time, the card detection circuit 212 detects an induced current generated in the detection input antenna 222 by electromagnetic induction.
- the magnetic pad 121 of the noncontact card 100 passes over the detection input antenna 222 of the card communication device 200, so the detection input antenna The induced current no longer flows from 222 to the card detection circuit 212.
- the card detection circuit 212 determines that the noncontact card 100 has been removed from the card communication device 200, and notifies the host-side controller 211 (S16).
- the card detection circuit 212 determines that the noncontact card 100 is starting to be taken out of the card communication device 200, the card detection circuit 212 is noncontact when the current from the detection input antenna 222 continues to flow. It is determined that the mold card 100 is reinserted in the middle of removal, and the host controller 211 is not notified (No in S15).
- the host-side controller 211 that has received the notification from the card detection circuit 212 ends the communication with the noncontact card 100 (S25). When communication with the noncontact card 100 has already been completed, the host controller 211 does not perform any operation (Yes in S24).
- the card detection circuit 212 stops the flow of current to the detection output antenna 221, and the induction current flows from the detection input antenna 222, that is, the noncontact card 100 is inserted into the card communication device 200. Wait for that (S17).
- proximity wireless communication by inductive coupling using inexpensive materials is used, and communication processing is not required before detection of the external medium, so an external medium communication system capable of detecting the external medium without contact. Can be realized at low cost and low power.
- proximity wireless communication if positional deviation larger than about the diameter of the antenna (about 1 mm in this embodiment) occurs between the two opposing antennas, communication can not be performed and inductive coupling is not established between the communication antennas. In this case, since the card detection circuit 212 can not detect the power loopback, it can be accurately detected whether the noncontact card 100 and the card communication device 200 can communicate.
- near-field wireless communication using electromagnetic induction as in this configuration can also propagate current of 1 GHz or more if the communication distance is approximately 1 to 3 mm, so communication at a high access speed is possible.
- FIG. 8 is a block diagram of the external medium communication system according to the second embodiment of the present invention
- FIG. 9 is a diagram showing that the contactless card 300 of the external medium communication system according to the second embodiment is inserted into the card communication device 400. It is a figure which shows the middle.
- FIG. 8 and FIG. 9 the same components as in FIG. 2 and FIG.
- the external medium communication system in the second embodiment is configured of a noncontact card 300 and a card communication device 400.
- the noncontact card 300 is characterized by including the magnetic body portion 310 and the wiring portion 320
- the card communication device 400 is characterized by including the host side LSI 410, the detection antenna portion 420 and the guide lane 430.
- the noncontact card 300 is an external medium such as a memory card, for example, and includes a magnetic body portion 310, a wiring portion 320, a communication antenna portion 130, and a card side LSI portion 110.
- the magnetic portion 310 is a permanent magnet made of a ferromagnetic material typified by iron oxide, cobalt and ferrite, and the input antenna for detection is in the process of attaching the noncontact card 300 to the card communication device 400 and in the process of being removed. It is installed to pass in the vicinity of 422.
- the wiring portion 320 is configured by the wiring 323, the conductor pad 321, and the conductor pad 322.
- Each of the conductor pads 321 and 322 is, for example, a coil with a diameter of about 1 mm, in which a conductor such as copper is formed into a winding, and when the noncontact card 300 and the card communication device 400 can communicate.
- the conductor pad 321 is disposed so as to face the detection output antenna 421, and the conductor pad 322 is disposed so as to face the detection input antenna 422.
- the wire 323 is a conductive wire made of a conductor such as copper, and one end of the coil of the conductor pad 321 and one end of the coil of the conductor pad 322, the other end of the coil of the conductor pad 321 and the other end of the coil of the conductor pad 322 Connect each one.
- the wiring portion 320 forms a closed circuit, and when an induced electromotive force is generated in the conductor pad 321, a current circulating in the wiring portion 320 flows, and a magnetic field is generated in the conductor pad 322 by electromagnetic induction.
- the card communication device 400 includes a host-side LSI 410, a detection antenna unit 420, a communication antenna unit 230, and a guide lane 430.
- the host-side LSI 410 is a device that communicates with the non-contact card 300, and is, for example, a memory card reader / writer.
- the host-side LSI 410 is a host-side controller 411, host-side reception circuit 213, host-side transmission circuit 214, and card detection circuit 412. And composed of
- the host-side controller 411 performs a data signal delivery operation between the host-side receiving circuit 213 and the host-side transmitting circuit 214 in accordance with the internally held program. For example, if the program is a memory read of the noncontact card 300, a data signal indicating a read operation is output to the host transmission circuit 214, and the contents of the memory held by the noncontact card 300 from the host reception circuit 213. Operation to wait for the input of a data signal containing.
- the card detection circuit 412 analyzes the signal from the detection antenna unit 420 and notifies the host-side controller 411 whether the noncontact card 300 is being inserted into the card slot of the card communication device 400 or not. Do. Further, when the card detection circuit 412 detects that the non-contact card 300 is being inserted into the card slot of the card communication device 400, it is detected that the non-contact card 300 is removed. In the meantime, a signal is output to the detection antenna unit 420, the signal from the detection antenna unit 420 is analyzed, and the host-side controller 411 is notified whether the noncontact card 300 is in a fixed position.
- the signal output from the card detection circuit 412 to the detection antenna unit 420 is, for example, a pulse current.
- the host-side controller 411 controls communication in accordance with the input from the card detection circuit 412. For example, in order to reduce power consumption, control is performed not to output a data signal to the host-side transmission circuit 214 or to not respond to a data signal from the host-side reception circuit 213 until there is an input from the card detection circuit 412. .
- the detection antenna unit 420 includes a detection output antenna 421 and a detection input antenna 422.
- the detection output antenna 421 is a coiled antenna with a diameter of about 1 mm, and transmits the signal input from the card detection circuit 412 to the noncontact card 300.
- the detection input antenna 422 is a coiled antenna with a diameter of about 1 mm, and outputs wireless data received from the noncontact card 300 to the card detection circuit 412.
- the guide lane 430 guides the non-contact card 300 to a fixed position for communicating with the card communication device 400.
- the card communication device 400 For example, it is a card slot portion of an SD card reader.
- the noncontact card 300 when the noncontact card 300 is inserted into or removed from the card communication device 400, the noncontact card 300 moves along the guide lane 430, so the magnetic body 310 of the noncontact card 300 and the wiring portion 320 communicate with the card.
- the communication antenna unit 130 of the noncontact card 300 and the communication antenna unit 230 of the card communication device 400 are positioned to face each other in a communicable state through the detection antenna unit 420 of the device 400.
- the direction of movement is determined by the guide lane 430 of the card communication device 400.
- the unit 310 passes above the detection input antenna 422 of the card communication device 400.
- the magnetic field generated by the magnetic portion 310 passes through the detection input antenna 422, and the induced current generated in the detection input antenna 422 flows to the card detection circuit 412.
- the card detection circuit 412 in which the induced current flows from the detection input antenna 422 determines that the noncontact card 300 is starting to be inserted into the card communication device 400, and to the detection output antenna 421. Send a pulse signal.
- the detection output antenna 421 generates a magnetic field by electromagnetic induction. At this time, if the noncontact card 300 is in a position where it can communicate with the card communication device 400, the conductor pad 321 of the noncontact card 300 is located on the detection output antenna 421, and the detection An induced electromotive force is generated on the conductor pad 321 by the magnetic field generated by the output antenna 421.
- the conductor pad 321 forms a closed circuit with the wiring 323 and the conductor pad 322, a current resulting from the electromotive force generated in the conductor pad 321 flows through the conductor pad 322.
- the conductor pad 322 generates a magnetic field by electromagnetic induction.
- An induced electromotive force is generated in the detection input antenna 422 located below the conductor pad 322 by the magnetic field generated by the conductor pad 322.
- a current due to the induced electromotive force generated in the detection input antenna 422 flows in the card detection circuit 412.
- the card detection circuit 412 when the card detection circuit 412 sends a current to the detection antenna 421, it detects the current from the detection input antenna 422 due to the sent current, and one of the powers output from the card detection circuit 412 The part will be returned to the card detection circuit 412 through the noncontact card 300. If the waveform of the current from the detection input antenna 422 corresponds to the waveform of the current sent to the detection output antenna 421, the card detection circuit 412 can confirm that the power is looped back. The host controller 411 is notified that the card 300 is in a fixed position, that is, the card communication device 400 and the noncontact card 300 are in a communicable positional relationship.
- the card detection circuit 412 determines that the noncontact card 300 is starting to be inserted into the card communication device 400 and flows a current to the detection output antenna 421, an induced current flows from the detection input antenna 422. If not, the card detection circuit 412 performs a retry process of supplying a current to the detection output antenna 421 a specific number of times. If no current flows from the detection input antenna 422 even after the retry process, the card detection circuit 412 determines that the non-contact card 300 has been taken out during insertion, and the magnetic material portion is again read from the detection input antenna 422. It waits for the current from the passage of 310 to flow. At this time, the card detection circuit 412 does not notify the host controller 411 anything.
- the host-side controller 411 that has received the detection notification of the noncontact card 300 from the card detection circuit 412 starts communication with the noncontact card 300.
- the operation at the time of communication between the noncontact card 300 and the card communication device 400 is the same as the operation at the time of communication between the noncontact card 100 and the card communication device 200 according to the first embodiment. I omit it.
- the card detection circuit 412 continues to flow the current to the detection output antenna 421, and the induction current flows from the detection input antenna 422, that is, is there a loopback through the noncontact card 300? Continue to monitor for negatives.
- the conductor pad 321 of the noncontact card 300 is the detection output antenna 421 of the card communication device 400, and the conductor pad 322 is the detection input antenna 422. Because the card detection circuit 412 of the noncontact card 300 does not face each other, the power that the card detection circuit 412 of the noncontact card 300 sends as a current to the detection output antenna 421 is interrupted in the loopback where the detection input antenna 422 returns as an induced current. At this point, the card detection circuit 412 determines that the non-contact card 300 is starting to be removed from the card communication device 400.
- the magnetic body portion 310 of the noncontact card 300 is a card communication device. It passes above 400 detection input antennas 422. At this time, a magnetic field is generated in the detection input antenna 422 by electromagnetic induction, and an induced current flows in the card detection circuit 412 of the card communication device 400.
- the card detection circuit 412 determines that the non-contact card 300 has been removed from the card communication device 400, and notifies the host-side controller 411. After the card detection circuit 412 determines that the noncontact card 300 is starting to be taken out of the card communication device 400, if the current from the detection input antenna 422 continues to flow, the card detection circuit 412 is noncontact. It is determined that the mold card 300 is reinserted in the middle of removal, and the host controller 411 is not notified.
- the host-side controller 411 notified from the card detection circuit 412 ends the communication with the noncontact card 300.
- the card detection circuit 412 stops the flow of current to the detection output antenna 421, and the induction current flows from the detection input antenna 422, that is, the noncontact card 300 is inserted into the card communication device 400. Wait for the thing.
- the conductor pad is not a permanent magnet, it is not necessary to process a conductive ferromagnetic material to produce a coiled permanent magnet.
- the magnetic body part 310 may be a nonconductor or a semiconductor, for example, may be implement
- the noncontact card 300 according to the second embodiment can be simplified in manufacture as compared to the noncontact card 100 according to the first embodiment.
- FIG. 13 is a block diagram of the external medium communication system according to the third embodiment of the present invention
- FIG. 14 is a diagram showing the contactless card 500 of the external medium communication system according to the third embodiment being inserted into the card communication device 600. It is a figure which shows the middle.
- FIG. 13 and FIG. 14 the same components as those in FIG. 2, FIG. 3 (a), FIG. 8 and FIG.
- the external medium communication system in the third embodiment is configured of a noncontact card 500 and a card communication device 600.
- the noncontact card 500 is characterized by having neither the magnetic wiring portion 120 nor the wiring portion 320, and the card communication device 600 is a communication device using the noncontact card 500 as an external medium.
- the noncontact card 500 is an external medium such as a memory card, for example, and includes a magnetic body portion 310, a communication antenna portion 130, and a card side LSI portion 110.
- the magnetic portion 310 is a permanent magnet made of a ferromagnetic material represented by iron oxide, cobalt and ferrite, for example, and is used for detection while the noncontact card 500 is attached to the card communication device 600 and removed. It is installed so as to pass in the vicinity of the antenna 621.
- the card communication device 600 communicates with the noncontact card 500 and is, for example, a memory card reader / writer.
- the card communication device 600 is a host-side LSI 610, a detection antenna 621, a communication antenna unit 230, and a guide lane 630. Configured
- the host-side LSI 610 is configured of a host-side controller 611, a host-side reception circuit 213, a host-side transmission circuit 214, and a card detection circuit 612.
- the host-side controller 611 performs a data signal delivery operation between the host-side reception circuit 213 and the host-side transmission circuit 214 in accordance with the internally held program. For example, if the program is a memory read of the noncontact card 500, a data signal indicating a read operation is output to the host transmission circuit 214, and the contents of the memory held by the noncontact card 500 from the host reception circuit 213. Operation to wait for the input of a data signal containing.
- the card detection circuit 612 analyzes the signal from the detection antenna 621 and notifies the host-side controller 611 whether or not the non-contact card 500 is being inserted into the card slot of the card communication device 600. .
- the host-side controller 611 controls communication in accordance with the input from the card detection circuit 612. For example, in order to reduce power consumption, control is performed not to output a data signal to the host-side transmission circuit 214 or not to react to the data signal from the host-side reception circuit 213 until there is an input from the card detection circuit 612. .
- the detection antenna 621 is a coiled antenna, and outputs to the card detection circuit 612 an induced current generated when the magnetic material portion 310 passes in the vicinity thereof.
- the guide lane 630 guides the placement of the noncontact card 500 so that the magnetic portion 310 passes near the detection antenna 621 while the noncontact card 500 is attached to the card communication device 600 and removed. It is a thing. For example, it is a card slot portion of an SD card reader.
- the magnetic material portion 310 of the contactless card 500 moves along the guide lane 630. It is positioned to pass over the detection antenna 621.
- the magnetic material of the noncontact card 500 is The unit 310 passes above the detection antenna 621 of the card communication device 600. At this time, the magnetic field generated by the magnetic portion 310 passes the detection antenna 621, and the induced current generated in the detection antenna 621 flows to the card detection circuit 612.
- the card detection circuit 612 in which the induced current flows from the detection antenna 621 determines that the noncontact card 500 has been inserted into the card communication device 600, and detects the insertion of the noncontact card 500.
- the host controller 611 is notified of the fact.
- the host-side controller 611 that has received notification of insertion detection of the noncontact card 500 from the card detection circuit 612 starts communication with the noncontact card 500.
- the operation at the time of communication between the noncontact card 500 and the card communication device 600 is the same as the operation at the time of communication between the noncontact card 100 and the card communication device 200 according to the first embodiment. .
- the moving direction is determined by the guide lane 630 of the card communication device 600. Therefore, the magnetic material portion 310 of the noncontact card 500 is the card communication device 600. Pass over the detection antenna 621 of At this time, the magnetic field generated by the magnetic portion 310 passes the detection antenna 621, and the induced current generated in the detection antenna 621 flows to the card detection circuit 612.
- the card detection circuit 612 determines that the non-contact card 500 has been removed from the card communication device 600, and notifies the host-side controller 611.
- the host controller 611 that has received the notification from the card detection circuit 612 ends the communication with the noncontact card 500.
- the manufacturing can be simplified as compared with the first and second embodiments, and an external medium communication system capable of detecting an external medium without contact can be configured.
- the card communication device 200, 400 or 600 and the non-contact card 100, 300 or 500 communicate using proximity wireless communication by magnetic field coupling of coils is described.
- the invention is not necessarily limited in this case.
- the detection antenna unit 230 and the magnetic material wiring unit 120 may be disposed such that the card detection circuit 212 can detect the loopback of the power.
- the magnetic substance pads 121 and 122 are coiled magnets made of conductive ferromagnetic material, but the present invention is not necessarily limited to this case.
- the magnetic pads 121 and 122 may be formed of a coil made of a conductor and a permanent magnet used as a core of the coil. By doing this, the magnetic pad does not have to be made of a conductive ferromagnetic material, and the structure of the magnetic pad can be simplified.
- the magnetic material pad 122 is a coiled magnet made of a conductive ferromagnetic material
- the present invention is not necessarily limited to this case.
- a conductor pad 322 which is a coil made of a conductor may be used instead of the magnetic pad 122. By doing this, the structure of the magnetic wiring portion 120 can be simplified.
- the card communication device 200 includes a transmission unit that supplies power to the host-side output antenna 231
- the non-contact card 100 includes a storage unit that receives power via the card-side input antenna 131.
- the non-contact card 100 The power may be received from the transmission unit of the card communication device 200 and stored in the storage unit, and the non-contact card 100 may operate with the power stored in the storage unit. In this way, the noncontact card 100 can be supplied with power in a noncontact manner only by adding the transmitter and the storage portion.
- the input antenna 131 and the output antenna 132 of the card antenna unit 130, the output antenna 231 and the input antenna 232 of the host antenna unit 230, and the output antenna 221 of the detection antenna unit 220 and the input Although the case has been described where the antenna 222, the output antenna 421 and the input antenna 422 of the detecting antenna unit 420, the magnetic pads 121 and 122, and the conductor pads 321 and 322 are all 1 mm diameter coiled antennas, It is not necessarily limited to this case.
- the four coiled antennas included in the noncontact card 100 or 300 and the four coiled antennas included in the card communication device 200 or 400 facing each other when communication with the noncontact card is possible.
- all the coils may have a diameter of 500 ⁇ m.
- an antenna of an appropriate size is used between the non-contact card 100 or 300 and the corresponding card communication device 200 or 400 in accordance with the required communication speed and the allowance of misalignment. It is possible.
- the magnetic body 310 is a permanent magnet made of a ferromagnetic material typified by iron oxide and cobalt, but the present invention is not necessarily limited to this case.
- the magnetic body portion 310 may be a bonded magnet such as a rubber magnet or a plastic magnet into which a ferromagnetic body is mixed.
- the third embodiment has described the case where the magnetic material portion 310 passes the proximity position of the detection antenna 621 while the noncontact card 500 is attached to or removed from the card communication device 600.
- the invention is not necessarily limited in this case.
- the magnetic body portion 310 is installed so as to face the detection antenna 621, and the card detection circuit 612 further includes the magnetic body portion 310. It is good also as what detects an induced current when it has faced antenna 621 for detection. By doing this, in addition to the fact that the non-contact card 500 is in the process of being attached and detached, the card communication device 600 can detect whether or not it is in a communicable position.
- the card communication apparatus includes one detection antenna unit, and the non-contact card includes one magnetic wiring unit or one wiring unit and one magnetic unit.
- the card communication apparatus includes a detection antenna unit G and a detection antenna unit H.
- the noncontact card P includes a wiring unit J facing the detection antenna unit G.
- the noncontact card Q includes a detection antenna unit.
- the card communication device may be provided with a wiring portion K facing H, and the card communication device may be provided with a medium type discrimination portion for discriminating the type of the external medium depending on which detection antenna portion causes the power loopback. By doing this, it becomes possible to determine the type only by placing the external medium at a fixed position for a plurality of external media having different commands and access antenna positions, for example, and a plurality of cards of different types. A corresponding multi-card reader can be realized.
- the card communication device and the noncontact card have two coiled antennas for performing near field communication by magnetic field coupling and perform full-duplex communication.
- the invention is not necessarily limited in this case.
- the card communication device includes a coil-shaped host side antenna
- the noncontact card includes a coiled card side antenna
- the card communication device and the noncontact card are formed by magnetic coupling between the host side antenna and the card side antenna.
- Half duplex communication may be performed. By doing this, it is possible to increase or decrease the number of antennas according to the number of transmission paths required for communication between the card communication device and the noncontact card.
- the card communication device includes a coil antenna A, antenna B, and antenna C for communication
- the noncontact card X includes a coil antenna D for communication and an antenna E.
- the antenna A and the antenna D face each other
- the antenna B and the antenna E face each other
- the noncontact card Y is provided with a coiled antenna F for communication and an antenna G.
- the card communication apparatus includes an antenna selection unit that selects an antenna for communication according to the antenna position of the external medium. It is also good. In this way, the card communication device can access a plurality of non-contact type cards with different antenna positions by using different antennas according to the type of card.
- An external medium communication system is an external medium communication system including an external medium and a communication device for communicating with the external medium, wherein the external medium is a first coil, A conductor comprising two coils and a wiring portion connecting one end of the first coil and one end of the second coil and connecting the other end of the first coil and the other end of the second coil
- An external medium detection antenna unit including a coiled first antenna, a coiled second antenna, and a current supply unit for supplying a current to the first antenna; And an external medium detection unit that detects that the first antenna and the second antenna are coupled by electromagnetic induction via the conductor portion by an induced electromotive force generated in the second antenna,
- the wiring portion and the external medium The first antenna and the first coil face each other when the external medium is mounted at a fixed position, and the second antenna faces the second coil. It is characterized in that it is provided at a position.
- the fact that the first antenna and the second antenna of the detection antenna unit are coupled by electromagnetic induction via the conductor unit is detected by the induced electromotive force generated in the second antenna.
- the conductor portion is at a fixed position, and it can be detected that the object facing the detection antenna portion is an external medium and that the communication device can communicate with the external medium.
- the electromagnetic induction coupling the electromagnetic wave is rapidly attenuated as it is separated from the near field of about the diameter of the coil, and the communication device can not detect the external medium if the external medium is displaced. It is possible to realize an external medium communication system capable of accurately detecting whether or not it is a fixed position for communication.
- the external medium further includes a proximity position of the second antenna while the external medium is being detached from the communication device.
- a permanent magnet may be provided at the passing position, and the external medium detection unit may further detect an induced electromotive force generated in the second antenna when the permanent magnet passes the near position.
- the communication device can detect that the external medium is in the process of being desorbed, so there is no need to perform an operation for detecting the position when the external medium is not at the fixed position, and saving of the communication device.
- the conductor portion is a permanent magnet
- the external medium detection portion further includes the conductor portion passing through the proximity position. The induced electromotive force generated in the second antenna may be detected.
- the external medium can integrate the conductor portion and the permanent magnet, and the external medium can be miniaturized in addition to the effects exhibited by the above (b).
- the communication device can fix the external medium at a fixed position, and in addition, it can reliably detect the middle of the external medium removal.
- the communication device supplies power to the coil-like host side antenna for communicating with the external medium, and the external medium. Therefore, the external medium includes a transmission unit for transmitting power to the host-side antenna, the external medium includes a medium-side antenna facing the host-side antenna when mounted at a fixed position, and electromagnetic induction is performed via the medium-side antenna Thus, the power supply for operating the external medium may be received from the transmission unit.
- the external medium can receive power for operating from the communication device through close proximity wireless communication, and the external medium can be miniaturized.
- the communication device is a communication device that communicates with an external medium including a conductor portion, and faces the conductor portion when the external medium is mounted at a fixed position.
- An external medium detection antenna unit comprising a coiled first antenna and a second antenna, a current supply unit for supplying current to the first antenna, the first antenna, and An external medium detection unit may be included to detect whether or not the second antenna is coupled by electromagnetic induction via the conductor unit.
- the conductor portion is at a fixed position by detecting that the first antenna and the second antenna of the detection antenna portion are coupled by electromagnetic induction through the conductor portion.
- a communication apparatus can be realized that can detect an external medium and can accurately detect whether the position of the external medium is a fixed position for communication.
- the external medium is a permanent magnet at a position passing the proximity position of the first antenna while the external medium is being desorbed.
- the external medium detection unit may detect an induced electromotive force generated in the second antenna when the permanent magnet passes the proximity position.
- the communication device can detect that the external medium is in the process of being desorbed, so there is no need to perform an operation for detecting the position when the external medium is not at the fixed position, and saving of the communication device.
- the communication device guides the external medium so that the permanent magnet passes the proximity position of the first antenna when the external medium is desorbed.
- a guide lane may be provided.
- the communication device can fix the external medium at a fixed position, and in addition, it can reliably detect the middle of the external medium removal.
- the communication device includes a coil-shaped host side antenna for communicating with the external medium, and power for the external medium to supply power to the host side antenna. And a transmitter for transmitting the information.
- the communication apparatus can transmit power for operating to the external medium through the close proximity wireless communication, and the external medium can be successfully miniaturized.
- an external medium includes a card detection antenna unit including a first antenna and a second antenna, and each antenna having a coil shape, and an external medium detection unit.
- An external medium for communicating with the first medium wherein the external medium includes a first coil facing the first antenna, a second coil facing the second antenna, and a second coil A wiring portion connecting one end and one end of the second coil and connecting the other end of the first coil and the other end of the second coil, the external medium being mounted at a fixed position
- a conductor portion may be provided to face the first antenna and further face the second antenna.
- the external medium of (k) may be provided with a permanent magnet at a position passing the proximity position of the first antenna while the external medium is being desorbed.
- the external medium can cause the communication device to detect that the external medium is in the process of being desorbed.
- the conductor portion is a permanent magnet, and the external medium passes through the proximity position of the first antenna while the external medium is desorbed. It may be in position.
- the external medium does not have to be provided with a magnet as a separate configuration from the conductor portion, and the external medium can be successfully miniaturized.
- the external medium communication system capable of detecting the external medium without contact can be realized at low cost, a digital such as a digital television or video recorder which handles a general purpose external medium such as an SD card. It is useful for devices, especially for mobile products such as digital cameras and smartphones, as it can be implemented with low power.
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Abstract
Description
外部媒体とアクセスできるインターフェースを有する通信装置において、アクセス前に外部媒体が通信可能であるか否かを認識することは重要である。無線でアクセスする場合、通信装置は外部媒体を何らかの方法で検出(ユーザが通知することも含む)しなければ、通信装置は外部媒体が存在しない空間に対して電波を送信する可能性がある。特許文献1の技術では、外部媒体が通信装置に近接していることを赤外線センサによって検出している。しかしながら、特許文献1の通信装置は、赤外線センサが物体を検知した場合には、その物体が外部媒体でない場合、例えば、その物体が単なる紙切れである場合でも、当該物体に対して電波を送信し無線通信を試みる。すなわち、特許文献1の技術では、無線通信を開始する前に外部媒体のみを選択的に検知することができない。
以下本発明の実施の形態について、図面を参照しながら説明する。
<構成>
図1は、本発明の実施の形態1における外部媒体通信システムの概要である。
以下、カード通信装置200が非接触型カード100を検出して通信を開始または終了するまでの処理を、非接触型カード100がカード通信装置200へ挿入されるケースおよび非接触型カード100がカード通信装置200から取り出されるケースについて、それぞれ説明する。
<構成>
図8は、本発明の実施の形態2における外部媒体通信システムの構成図であり、図9は、実施の形態2における外部媒体通信システムの非接触型カード300がカード通信装置400に挿入される途中を示す図である。図8、図9において、図2、図3(a)と同じ構成要素については同じ符号を用い、説明を省略する。
以下、カード通信装置400が非接触型カード300を検出して通信を開始または終了するまでの処理を、非接触型カード300がカード通信装置400へ挿入されるケースおよび非接触型カード300がカード通信装置400から取り出されるケースについて、それぞれ説明する。
カード検出回路412は、非接触型カード300がカード通信装置400から取り出され始めていると判断した後、検出用入力アンテナ422からの電流が継続して流れている場合、カード検出回路412は非接触型カード300が取出し途中で再度挿入されたと判断し、ホスト側コントローラ411には通知しない。
<構成>
図13は、本発明の実施の形態3における外部媒体通信システムの構成図であり、図14は、実施の形態3における外部媒体通信システムの非接触型カード500がカード通信装置600に挿入される途中を示す図である。図13、図14において、図2、図3(a)、図8、図9と同じ構成要素については同じ符号を用い、説明を省略する。
以下、カード通信装置600が非接触型カード500を検出して通信を開始または終了するまでの処理を、非接触型カード500がカード通信装置600へ挿入されるケースおよび非接触型カード500がカード通信装置600から取り出されるケースについて、それぞれ説明する。
(1)実施の形態1~3では、カード通信装置200、400または600と非接触型カード100、300または500とが、コイルの磁界結合による近接無線通信を用いて通信する場合について説明したが、本発明は必ずしもこの場合に限定されない。例えば、カード通信装置200とカード100との間で有線接続による通信をするものとし、カード通信装置200とカード100との間で有線接続に係る全端子が正常に接続される位置関係にある場合にカード検出回路212が電力のループバックを検出できるように、検出用アンテナ部230と磁性体配線部120とを配置するとしてもよい。このようにすることで、カード通信装置とカードの間の通信方式にかかわらず、カード通信装置とカードの位置関係を高精度に検出する必要がある場合に本発明を適用することができる。
110 カード側LSI
111 カード側コントローラ
112 カード側受信回路
113 カード側送信回路
120 磁性体配線部
121 磁性体パッド
122 磁性体パッド
123、323 配線
130 通信用アンテナ部
131 カード側入力アンテナ
132 カード側出力アンテナ
200、400、600 カード通信装置
210、410、610 ホスト側LSI
211、411、611 ホスト側コントローラ
212、412、612 カード検出回路
213 ホスト側受信回路
214 ホスト側送信回路
220、420 検出用アンテナ部
221、421 検出用出力アンテナ
222、422 検出用入力アンテナ
230 通信用アンテナ部
231 ホスト側出力アンテナ
232 ホスト側入力アンテナ
240、430、630 ガイドレーン
310 磁性体部
320 配線部
321 導体パッド
322 導体パッド
621 検出用アンテナ
Claims (12)
- 外部媒体と、前記外部媒体と通信を行う通信装置とからなる外部媒体通信システムであって、
前記外部媒体は、
第1のコイルと、第2のコイルと、前記第1のコイルの一端と前記第2のコイルの一端を接続し、前記第1のコイルの他端と前記第2のコイルの他端を接続する配線部とからなる導体部
を備え、
前記通信装置は、
コイル状の第1のアンテナと、コイル状の第2のアンテナとからなる外部媒体検出用アンテナ部と、
前記第1のアンテナに電流を供給する電流供給部と、
前記第1のアンテナと前記第2のアンテナとが前記導体部を介して電磁誘導により結合されていることを前記第2のアンテナに生じる誘導起電力により検知する外部媒体検出部と
を含み、
前記配線部と前記外部媒体検出部とは、前記外部媒体が定位置に装着されているときに、前記第1のアンテナと前記第1のコイルとが対向し、前記第2のアンテナと前記第2のコイルとが対向する位置に設けられている
ことを特徴とする外部媒体通信システム。 - 前記外部媒体はさらに、
前記外部媒体が前記通信装置に脱着される途中に、前記第2のアンテナの近接位置を通過する位置に永久磁石を備え、
前記外部媒体検出部は、さらに前記永久磁石が近接位置を通過することにより前記第2のアンテナに発生する誘導起電力を検知する
ことを特徴とする請求項1に記載の外部媒体通信システム。 - 前記導体部は永久磁石であって、
前記外部媒体検出部は、さらに前記導体部が近接位置を通過することにより前記第2のアンテナに発生する誘導起電力を検知する
ことを特徴とする請求項1に記載の外部媒体通信システム。 - 前記通信装置は、
前記外部媒体を脱着する際に、前記永久磁石が前記第2のアンテナの近接位置を通過するよう前記外部媒体を案内するガイドレーンを備える
ことを特徴とする請求項2または請求項3に記載の外部媒体通信システム。 - 前記通信装置は、
前記外部媒体と通信するためのコイル状のホスト側アンテナと、
前記外部媒体に電力供給を行うため前記ホスト側アンテナに電力を送信する送信部を備え、
前記外部媒体は
定位置に装着されたときに前記ホスト側アンテナに対向する媒体側アンテナを備え、
前記媒体側アンテナを介して、電磁誘導により前記外部媒体が動作するための電力の供給を前記送信部より受ける
ことを特徴とする請求項1に記載の外部媒体通信システム。 - 導体部を備える外部媒体に対して通信を行う通信装置であって、
外部媒体が定位置に装着されているときに前記導体部に対向するよう設けられているコイル状の第1のアンテナと第2のアンテナとからなる外部媒体検出用アンテナ部と、
前記第1のアンテナに電流を供給する電流供給部と、
前記第1のアンテナと前記第2のアンテナとが前記導体部を介して電磁誘導により結合されているか否かを検知する外部媒体検出部とを含む
ことを特徴とする通信装置。 - 前記外部媒体は、
前記外部媒体が脱着される途中に、前記第1のアンテナの近接位置を通過する位置に永久磁石を備え、
前記外部媒体検出部は、前記永久磁石が近接位置を通過することにより前記第2のアンテナに発生する誘導起電力を検知する
ことを特徴とする請求項6に記載の通信装置。 - 前記外部媒体を脱着する際に、前記永久磁石が前記第1のアンテナの近接位置を通過するよう前記外部媒体を案内するガイドレーンを備える
ことを特徴とする請求項7に記載の通信装置。 - 前記外部媒体と通信するためのコイル状のホスト側アンテナと、
前記外部媒体に電力供給を行うため前記ホスト側アンテナに電力を送信する送信部とをさらに備える
ことを特徴とする請求項6に記載の通信装置。 - 第1のアンテナと第2のアンテナとを含み、それぞれのアンテナがコイル状であるカード検出アンテナ部と、外部媒体検出部とを備える通信装置に対して通信を行う外部媒体であって、
前記第1のアンテナに対向する第1のコイルと、前記第2のアンテナに対向する第2のコイルと、前記第1のコイルの一端と前記第2のコイルの一端を接続し、前記第1のコイルの他端と前記第2のコイルの他端を接続する配線部とからなり、前記外部媒体が定位置に装着されているときに、前記第1のアンテナに対向し、さらに前記第2のアンテナに対向するよう設けられた導体部を備える
ことを特徴とする外部媒体。 - 前記外部媒体が脱着される途中に、前記第1のアンテナの近接位置を通過する位置に永久磁石を備える
ことを特徴とする請求項10に記載の外部媒体。 - 前記導体部は永久磁石であって、前記外部媒体が脱着される途中に、前記第1のアンテナの近接位置を通過する位置にある
ことを特徴とする請求項10に記載の外部媒体。
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US13/809,976 US8977200B2 (en) | 2011-11-14 | 2012-08-23 | Communication device performing medium detection by near field communication, external device, and external medium communication system |
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US9621228B2 (en) | 2014-08-29 | 2017-04-11 | Freelinc Technologies | Spatially aware communications using radio frequency (RF) communications standards |
KR101673240B1 (ko) * | 2014-11-13 | 2016-11-07 | 주식회사 에이치시티엠 | 모바일 기기용 영구자석 구조물 |
WO2016076498A1 (ko) * | 2014-11-13 | 2016-05-19 | 주식회사 에이치시티엠 | 모바일 기기용 코일형 루프 안테나 |
US10164685B2 (en) | 2014-12-31 | 2018-12-25 | Freelinc Technologies Inc. | Spatially aware wireless network |
CN107615674A (zh) * | 2015-05-15 | 2018-01-19 | 夏普株式会社 | 信息处理装置、信息处理装置的控制方法以及控制装置 |
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US8977200B2 (en) | 2015-03-10 |
US20130149963A1 (en) | 2013-06-13 |
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