JP2012141871A - Noncontact communication medium and communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a noncontact communication medium for preventing the occurrence of such a communication error that when card data are transmitted/received between a self-noncontact IC card and the other noncontact IC card, neither the self-noncontact IC card nor the other noncontact IC card can receive the card data of the other party.SOLUTION: This noncontact communication medium is configured to start an electronic circuit by power source starting means of an operation part, and to start a data reception mode and rise a data reception mode flag by receiving operation means, and to perform noncontact proximity communication for exchanging data between the self-noncontact communication medium and an external communication medium closely arranged within 2 cm. This noncontact communication medium is configured to, firstly, transmit card data request inquiry data to the external communication medium, and to, when receiving a card data request command from the external communication medium, transmit self-card data to the external communication medium, and to rise the data reception mode flag, and to transmit the card data request command to the external communication medium, and to receive the card data of the other party to display it at a display device.

Description

  The present invention relates to a contactless communication medium having a function of displaying information and capable of transmitting and receiving information, and more particularly to a contactless communication medium and a communication method in the form of an IC card.

  In recent years, contactless communication media such as contactless IC cards capable of exchanging information without contact have become widespread as tickets for transportation and the like and electronic money media. These communicate by transmitting and receiving via an antenna connected to the IC chip.

  Conventionally, in order to read information recorded on a non-contact IC card, a reader for receiving electromagnetic waves transmitted separately from the non-contact IC card is required, and communication between single non-contact IC cards is possible. There wasn't. In Patent Document 1, in order to solve this problem, there is a non-contact IC card technique for communicating card data between non-contact IC cards by electromagnetic induction, receiving the other party's card data, and displaying it on a display device. Proposed.

JP 2003-216912 A

  However, in the technique of Patent Document 1, the communication request signal is periodically transmitted to detect whether or not the communication partner IC card exists within the communicable range. There is a problem that much of the power is consumed due to communication. In addition, when sending / receiving card data to / from the other party's non-contact IC card, if both the non-contact IC cards attempt to send card data to the other party, both non-contact IC cards are both There was a problem that the card data could not be received and a communication error occurred. An object of the present invention is to provide a non-contact communication medium that solves such conventional problems.

  In order to solve the above-described problems, the present invention includes at least a display device, an arithmetic processing unit, a communication control circuit, a power circuit including a battery, and a non-contact proximity communication loop antenna embedded therein, An IC card type non-contact communication medium having an operation unit having an activation unit and a reception operation unit, wherein the electronic circuit is activated by the power activation unit and a data reception mode is initiated by the reception operation unit A non-contact proximity communication for exchanging data with an external communication medium arranged in the vicinity within 2 cm, first sending a card data request inquiry data to the external communication medium, When a card data request command is received as a response from the external communication medium, the card data is transmitted to the external communication medium and then the data is transmitted. A communication mode flag is set, and when the data reception mode flag is set, a card data request command is transmitted to the external communication medium to receive the other party's card data and display it on the display device. It is a non-contact communication medium.

  The present invention is also the above-described non-contact communication medium, wherein the communication control circuit has a communication mode in which the communication control circuit operates as a reader / writer in the reader / writer communication standard, and the arithmetic processing unit is a peer-to-peer. A non-contact communication medium characterized by performing control for switching between a communication standard and a reader / writer communication standard.

  Further, the present invention is the contactless communication medium described above, wherein the power supply circuit includes a power receiving coil, and the power receiving coil receives power from an external charger by electromagnetic induction and charges the battery. A non-contact communication medium characterized by the above.

  In addition, the present invention includes at least a display device, an arithmetic processing unit, a communication control circuit, an electronic circuit including a power supply circuit including a battery, and a loop antenna for non-contact proximity communication, embedded in a power supply activation unit and a reception operation unit. A communication method using a non-contact communication medium including an operation unit having a data reception mode flag when the electronic circuit is activated by the power activation unit and a data reception mode is initiated by the reception operation unit The contactless proximity communication for exchanging data with an external communication medium arranged in the vicinity of 2 cm is performed, and first, data request inquiry data is transmitted to the external communication medium, and the response of the external communication medium When a data request command is received, a data reception mode flag is set after transmitting its own data to the external communication medium, and the data reception command is received. If the mode flag is set, a communication method, wherein the sending to the external communication medium data request command for displaying on the display device receives the opponent data.

  Further, the present invention is the communication method described above, wherein when the total processing time limit set for the total time spent for communication processing has elapsed, the data reception mode is terminated and the data reception mode flag is deleted. This is a communication method characterized by the above.

  The non-contact communication medium 100 with a display function of the present invention has an effect of minimizing power consumption since the electronic circuit is activated after the power button 111 is pressed. Since the other party's card data 304 is tried to be received before transmitting his / her own card data 303, neither the non-contact communication medium 100 nor the external communication medium 400 can receive the other party's card data. is there.

(A) is a top view of the non-contact communication medium of the 1st Embodiment of this invention. (B) is a sectional side view of the non-contact communication medium of (a). (A) is a block diagram showing data communication between a non-contact communication medium and an external communication medium of the present invention. (B) is a perspective view which shows arrangement | positioning of the non-contact communication medium at the time of performing data communication of embodiment of this invention, and an external communication medium. It is a block diagram of the electronic circuit of the non-contact communication medium of the 1st Embodiment of this invention. It is a figure which shows the internal block structure of the non-contact communication medium of the 1st Embodiment of this invention. It is a block diagram which shows the structure of the data of the memory | storage means of the non-contact communication medium of the 1st Embodiment of this invention. It is a top view of the non-contact communication medium of the modification 1 of the 1st Embodiment of this invention. It is a flowchart which shows the communication procedure by the non-contact communication medium of the 1st Embodiment of this invention. It is a flowchart which shows the communication procedure by the non-contact communication medium of the 1st Embodiment of this invention. It is a flowchart which shows the communication procedure by the non-contact communication medium of the modification 2 of the 1st Embodiment of this invention. It is a flowchart which shows the communication procedure by the non-contact communication medium of the 1st Embodiment of this invention. It is a flowchart which shows the communication procedure by the non-contact communication medium of the 1st Embodiment of this invention. It is a sequence diagram which shows communication of the data in the non-contact proximity communication between the non-contact communication medium and the external communication medium of the 1st Embodiment of this invention. It is a sequence diagram which shows communication of the data in the non-contact proximity communication between the non-contact communication medium and the external communication medium of the 1st Embodiment of this invention. It is a sequence diagram which shows communication of the data in the non-contact proximity communication between the non-contact communication medium and the external communication medium of the 1st Embodiment of this invention. It is a top view of the non-contact communication medium of the 2nd Embodiment of this invention.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described. FIG. 1A is a schematic diagram showing the structure of the outer portion of the non-contact communication medium 100 according to the present invention. FIG. 1B is a side sectional view of the non-contact communication medium 100. The non-contact communication medium 100 of the present invention is an IC card type small-size non-contact communication medium 100 including at least a display device 101 and an operation unit 110. The operation unit 110 includes a power activation unit 111 including at least a power switch and a power button, and a reception operation unit 112 including a reception switch and a reception button. Further, the wiring circuit layer 120 and the battery 131 are embedded.

  FIG. 2A is a block diagram showing the relationship between the IC card type non-contact communication medium 100, the external communication medium 400, and the external charger 500 of the present invention. FIG. 2B shows a positional relationship in the vicinity where the gap between the cards is 2 cm or less when data communication is performed between the IC card type non-contact communication medium 100 and the external communication medium 400. It is a perspective view. As shown in FIG. 2B, in a state where the cards of the IC card type non-contact communication medium 100 and the external communication medium 400 are arranged in the vicinity of 2 cm or less, data is exchanged by performing non-contact proximity communication between the cards. To do. The non-contact communication medium 100 has a power circuit 130, and a power receiving coil 202 connected thereto receives power from the external charger 500 by electromagnetic induction and supplies the power to the power circuit 130 to charge the battery 131 with the power. . The power supply circuit 130 operates the electronic circuit of the non-contact communication medium 100 using the electric power stored in the battery 131. Thereby, the non-contact communication medium 100 of this embodiment does not have the external connection terminal for charging electric power to the battery 130, and does not need to expose the electrode for receiving electric power outside. Thereby, this non-contact communication medium 100 has an effect of high water resistance.

  FIG. 3 is a block diagram of the electronic circuit of the non-contact communication medium 100. FIG. 4 is a diagram showing an example of arrangement of main elements of the non-contact communication medium 100 in the card. The display device 101 is connected to an arithmetic processing device (CPU) 121, and the arithmetic processing device 121 outputs display information to the display device 101 to control display. As the arithmetic processing unit 121, an integrated circuit including a storage unit 121a for recording information is used. As the storage unit 121a, an integrated circuit storage circuit external to the arithmetic processing unit 121 may be used. An outline of data stored in the storage unit 121a is shown in FIG. A communication control circuit 122 is connected to the arithmetic processing unit 121. The communication control circuit 122 generates an oscillating current for the loop antenna 201 and controls data communication with the external communication medium 400 via the loop antenna 201. The communication control circuit 122 is connected to the oscillation circuit OSC-3 and a loop antenna 201 for transmitting and receiving electromagnetic waves, thereby constituting the neighborhood communication means 200.

<Modification 1>
In FIG. 6, the top view of the non-contact communication medium 100 of the modification 1 of this embodiment is shown. In the first modification, a display button 113 is provided on the operation unit 110. When the operator presses the display button 113, the arithmetic processing unit 121 reads out the data stored in the storage unit 121a and causes the display unit 101 to output the data.

  As the neighborhood communication means 200, an integrated circuit communication integrated circuit (IC1) 122 and an oscillation circuit OSC-3 used in a general reader / writer device can be used. The communication control circuit (IC1) 122 of the neighboring communication means 200 includes a communication control circuit 122 that can switch between a peer-to-peer communication standard and a reader / writer communication standard as a communication standard for reading information. Is used. Thereby, the non-contact communication medium 100 of this embodiment has a communication mode in which it operates as a reader / writer in the reader / writer communication standard. The non-contact communication medium 100 of this embodiment uses NFC (Near Field Communication) corresponding to these two communication standards. NFC is a short-range wireless communication standard and supports a plurality of standards such as FeliCa (registered trademark) and MIFARE (registered trademark). In order to save space as much as possible, the communication loop antenna 201 is preferably an etching antenna patterned with a metal foil or a wound antenna using an enameled wire. The loop antenna 201 of the proximity communication unit 200 preferably forms an antenna loop according to the shape of the non-contact communication medium 100.

  In addition, the arithmetic processing unit 121 includes an initialization circuit 123 for initializing the arithmetic processing unit (CPU) 121, an operation unit 110 (CTL) including a power activation unit 111 and a reception operation unit 112, and a non-contact type A power supply circuit 130 that supplies power to the entire communication medium 100 is connected. The arithmetic processing unit 121 is further connected with an oscillation circuit OSC-1 of 20 MHz that generates a clock timing signal of the arithmetic processing unit (CPU) 121 and an oscillation circuit OSC-2 of 32.768 kHz. Further, a battery (battery) 131 and a power receiving coil 202 are connected to the power supply circuit 130.

  Communication with the external communication medium 400 is performed by the proximity communication means 200 including the loop antenna 201, the communication integrated circuit (IC1) 122, and the oscillation circuit OSC-3 in FIG. The strength of the electromagnetic field output from the loop antenna 201 of the proximity communication means 200 is such that non-contact proximity communication is performed by bringing the non-contact IC medium (IC card) of the external communication medium 400 and the non-contact communication medium 100 close to each other within 2 cm. Make the output intensity as high as possible. Further, non-contact proximity communication is performed in which a signal is received by detecting the induced voltage generated in the loop antenna 201 due to a magnetic field change generated by the external communication medium 400 close to the vicinity within 2 cm by the communication integrated circuit (IC1) 122. . By setting in this way, data communication between the IC card type non-contact communication medium 100 and the external communication medium 400 is limited to non-contact proximity communication in the vicinity of 2 cm or less, and there is a risk that the communication is intercepted outside. There is an effect of reducing the property.

  Next, a detailed structural example of the non-contact communication medium 100 according to the present invention will be described. FIG. 1B shows a side sectional view of the non-contact communication medium 100 of the present embodiment. In FIG. 1B, the display device 101 and the operation unit 110 are arranged on the uppermost layer. Next, in order from the top, a layer including the loop antenna 201 of the neighboring communication means 200 is arranged. Further, a wiring circuit layer 120 in which a wiring circuit for connecting the arithmetic processing unit 121 and the communication control circuit 122 is formed is disposed below. Next to the wiring circuit layer 120, a battery 131 that is a power source of the non-contact communication medium 100 is provided. Of course, the order of these layers can be changed according to the purpose. In addition to the arithmetic processing unit 121 and the communication control circuit 122, a connector for the display device 101, a power supply circuit 130, and the like are electrically connected to the wiring circuit layer 120. Further, the loop antenna 201 may be formed on the base material of the wiring circuit layer 120.

  As the display device 101 used in the present invention, a liquid crystal display device, an organic EL display device, an electrophoretic display device, or a general display device can be used. For example, a ferroelectric liquid crystal display device or an electrophoretic display device is suitable for long-time use because it consumes power only when switching images. On the other hand, when displaying a dynamic image, a liquid crystal display device or an organic EL display device is preferable.

  The circuit of the operation unit 110 includes at least a power activation unit 111 for turning on / off the power supply, and a reception operation unit 112 for setting a command for starting a data reception mode from the external communication medium 400 by proximity communication. Depending on how the non-contact communication medium 100 is used, a command button for scrolling the display screen may be provided.

  The arithmetic processing device 121 controls the display device 101 and the communication control circuit 122. Further, the power supply circuit 130, the power activation unit 111 of the operation unit 110, and the reception operation unit 112 are electrically connected. The connection circuit may include a relay circuit (integrated circuit), and includes, for example, a UART (Universal Asynchronous Receiver Transmitter) between the communication control circuit 122 and the arithmetic processing unit 121.

  These components may be individually provided on the circuit, or a predetermined plurality of components may be packaged and combined. Moreover, you may add another component between each layer. For example, a magnetic sheet for reducing electromagnetic noise can be added between the display device and an adjacent layer (with the loop antenna 201).

(Communication processing procedure)
Next, with reference to the flowcharts of FIGS. 7 to 11 and the sequence diagrams of FIGS. 12 to 14, the communication processing procedure of the non-contact communication medium 100 with a display function of the present embodiment will be described. In the non-contact communication medium 100 of this embodiment, the arithmetic processing unit 121 operates in accordance with the processing program 301 stored in the storage unit 121a incorporated therein or externally to control the communication control circuit 122. The communication control circuit 122 attempts to communicate with the external communication medium 400 using electromagnetic induction caused by an electromagnetic field generated by causing a current to flow through the loop antenna 201.

  That is, the arithmetic processing unit 121 operates the communication control circuit 122 according to the case where the external communication medium 400 operates according to the peer-to-peer communication standard and the case where the external communication medium 400 operates according to the reader / writer communication standard. The communication mode is switched to communicate with the external communication medium 400, and the communication standard of the external communication medium 400 is detected. Then, card data is transmitted / received to / from the external communication medium 400 according to the communication standard of the external communication medium 400.

  Since the non-contact communication medium 100 of this embodiment can also operate as a reader / writer in the reader / writer communication standard, an ordinary non-contact IC card in which the other external communication medium 400 only responds to the reader / writer is used. Even in such a case, it is possible to read the other party's card data 304 and transmit the information on the display device 101, which has a convenient function of displaying the other party's card data 304 information.

Hereinafter, the operation of the contactless communication medium 100 of the present embodiment will be described in detail. First, when the power activation unit 111 of the non-contact communication medium 100 is turned on, the electronic circuit of the non-contact communication medium 100 is activated, and first, the arithmetic processing unit 121 starts the processing after step S1 in FIG.
(Step S1)
As shown in the flowchart of FIG. 7, when a data reception mode start command is set in the reception operation unit 112 when the reception switch or the reception button of the non-contact communication medium 100 is pressed by the operator, as shown in FIG. 5. In the data reception mode flag column 302 of the storage unit 121a, the data set with the “reception mode” flag is stored. In an initial state in which the command for starting the data reception mode is not set in the reception operation unit 112, the data of the “reception mode” flag is not written in the data reception mode flag column 302 of the storage unit 121a.

(Step S2)
Next, the contactless communication medium 100 automatically starts a peer-to-peer communication mode, and the external communication medium 400 and the peer-to-peer (Peer to Peer).
eer) Attempt to communicate in communication mode. That is, the arithmetic processing unit 121 of the non-contact communication medium 100 controls the communication control circuit 122 so that the peer-to-peer (Peer) as shown in FIG.
to Peer) communication standard inquiry data is transmitted to the external communication medium 400. Then, the communication waiting process of subroutine SB1 in FIG. 8 is executed to wait until peer-to-peer communication standard response data is transmitted from the external communication medium 400. If the response data according to the peer-to-peer communication standard is not received within the predetermined communication waiting time, the process of the subroutine SB1 ends, and then the process proceeds to step S3. As shown in FIG. 12, peer to peer (Peer to Peer)
If Peer) communication standard response data is received, the process proceeds to step S4.

(Step S3)
As shown in the sequence diagram of FIG. 14, within a predetermined communication waiting time, peer-to-peer (Peer)
to Peer) When communication standard response data cannot be received, communication of the reader / writer communication standard is attempted. That is, the arithmetic processing unit 121 controls the integrated circuit of the communication control circuit 122 of the neighboring communication means 200, and in the reader / writer communication mode, which is the communication mode when the partner is a non-contact IC card, as shown in FIG. In addition, the reader / writer communication standard inquiry data is transmitted to the external communication medium 400. Then, the communication waiting process of the subroutine SB1 in FIG. 8 is executed to wait until the reader / writer communication standard response data is transmitted from the external communication medium 400. If the reader / writer communication standard response data cannot be received within the predetermined communication waiting time, the process returns to step S1, and if the reader / writer communication standard response data is received, the process proceeds to step S5.

(Step S4)
When the peer-to-peer communication standard response data is received, the peer-to-peer communication process of subroutine SB2 of FIG. 10 is executed, and then the process returns to step S1.
(Step S5)
When the reader / writer communication standard response data is received, the reader / writer communication process of subroutine SB3 in FIG. 11 is executed, and then the process returns to step S1.

(Subroutine process SB1: Communication waiting process)
As shown in the flowchart of FIG. 8, the arithmetic processing unit 121 waits for communication from the external communication medium 400 that satisfies the communication waiting condition while determining whether to end communication according to the communication end condition. The communication end condition is to forcibly interrupt the process and turn off the power when, for example, the power activation unit 111 of the operation unit 110 is instructed to turn off the power. Also, when the total time spent for processing exceeds the total processing time limit, it is determined that the termination condition of the entire communication processing is satisfied, the processing is forcibly interrupted, and the power is turned off. When the power is turned off, the data reception mode flag is erased at the same time.

<Modification 2>
Further, as in Modification 2 shown in the flowchart of FIG. 9, when the total time spent for processing has exceeded the total processing time limit, the data reception mode may be terminated without turning off the power. In the case of the second modification, the data reception mode flag is deleted, and the mode shifts to another mode such as a display mode in which the data stored in the storage unit 121a is read and displayed. Note that an error message indicating that reception is not possible may be output to the display device 101 before the power is turned off or before the mode is changed.

 On the other hand, as shown in the flowcharts of FIGS. 8 and 9, when a predetermined communication waiting time elapses or predetermined data is received within the communication waiting time, the process exits from the subroutine process SB1.

(Subroutine processing SB2: Peer-to-peer communication processing)
(Step S10)
As shown in FIG. 12, when peer-to-peer communication standard response data is received, card data request inquiry data is transmitted to the external communication medium 400. Then, transmission of a card data request command, which is a response from the external communication medium 400, is awaited by the communication waiting process of subroutine SB1 in FIG. When the card data request command is received from the external communication medium 400 as shown in FIG. 12, the process proceeds to step S11. If the card data request command is not received within the predetermined communication time as shown in FIG. 13, the process proceeds to step S12.

(Step S11: When there is a data transmission request)
First, the data of the “reception mode” flag is erased from the data reception mode flag column 302 of the storage unit 121a. Next, the user's own card data 303 requested from the external communication medium 400 is read from the storage unit 121a, and the own card data 303 is transmitted to the external communication medium 400 as shown in FIG. Next, the data reception mode flag column 302 of the storage unit 121a stores the data set with the “reception mode” flag. Next, the process proceeds to step S13.

(Step S12: When there is no data transmission request)
If flag data “reception mode” is stored in the data reception mode flag column 302 of the storage unit 121a and the flag is set, the process proceeds to step S13. Otherwise, exit from the subroutine process SB2.

(Step S13)
When the “reception mode” flag is set in the data reception mode flag field 302 of the storage unit 121a, a card data request command is transmitted to the external communication medium 400 as shown in FIG. 12 or FIG. In the communication waiting process of the subroutine SB 1, the process waits until the partner card data 304 is transmitted from the external communication medium 400. When the partner card data 304 is received from the external communication medium 400, the process proceeds to step S14. If the opponent's card data 304 is not received within the predetermined communication time, the process proceeds to step S15.

(Step S14)
The other party's card data 304 received from the external communication medium 400 is stored in the storage unit 121 a, and the other party's card data 304 is displayed on the display device 101. Next, the subroutine process SB2 is exited. Here, the content of the processing program 301 describing the processing for the arithmetic processing unit 121 to output the display data to the display device 101 is automatically selected from the information of the partner card data 304 stored in the storage unit 121a. The display may be selected and displayed, or the user may select the display contents by operating the operation unit 110 while confirming the display device 101.
(Step S15)
If the other party's card data 304 cannot be received from the external communication medium 400 within a predetermined communication time, a communication error message is displayed on the display device 101. Next, the subroutine process SB2 is exited.

(Subroutine process SB3: Reader / writer communication process)
(Step S20)
When the reader / writer communication standard response data is received, if flag data for which the “reception mode” flag is set is stored in the data reception mode flag field 302 of the storage unit 121a, the process proceeds to step S21. Otherwise, the subroutine process SB3 is exited.

(Step S21)
As shown in FIG. 14, a card data request command is transmitted to the external communication medium 400, and the transmission of card data from the external communication medium 400 is awaited by the communication wait process of subroutine SB1 in FIG. If the partner card data 304 is received from the external communication medium 400, the process proceeds to step S22. If the partner card data 304 is not received, the process proceeds to step S23.

(Step S22)
The other party's card data 304 received from the external communication medium 400 is stored in the storage unit 121 a, and the other party's card data 304 is displayed on the display device 101. Next, the subroutine process SB3 is exited.
(Step S23)
If the other party's card data 304 cannot be received from the external communication medium 400, a communication error message is displayed on the display device 101. Next, the subroutine process SB3 is exited.

  As described above, the non-contact communication medium 100 with a display function of the present invention activates an electronic circuit when the power activation means 111 is activated by a command given by an operation such as pressing the power button from the operator, When the start command of the data reception mode is set from the reception operation unit 112 by a command given by an operation such as pressing the reception button, a data reception mode flag is set in the storage unit 121a. First, the card data is stored in the external communication medium 400. When request inquiry data is transmitted and a card data request command is received as a response of the external communication medium 400, its own card data 303 is transmitted to the external communication medium 400, and then a data reception mode flag is set in the storage means 121a. If the data reception mode flag is set in the storage unit 121a, the external communication medium 400 Dodeta 304 displayed on the display device 101 receives. Accordingly, the non-contact communication medium 100 with a display function of the present invention attempts to receive the partner's card data 304 before transmitting its own card data 303 to the partner's external communication medium 400. In addition, there is an effect that none of the external communication media 400 can receive the other party's card data.

<Second Embodiment>
As shown in FIG. 15, the non-contact communication medium 100 of the second embodiment is provided with a power activation data reception button 114 on the operation unit 110. The power activation data reception button 114 is an operation button that combines the power activation means 111 and the reception button 112 shown in FIG. 1A in the first embodiment. The data reception mode is started when the circuit is activated. Thus, by providing the non-contact communication medium 100 with the power activation data reception button 114 including the power activation unit 111 and the reception button 112, there is an effect that the operation of the non-contact communication medium 100 is facilitated.

DESCRIPTION OF SYMBOLS 100 ... Non-contact communication medium 101 with a display function ... Display apparatus 110 ... Operation part 111 ... Power supply starting means 112 ... Reception operation means 113 ... Display button 114 ... Power supply starting data Receive button 120 ... wiring circuit layer 121 ... arithmetic processing unit (CPU)
121a ... storage means 122 ... communication control circuit 123 ... initialization circuit 130 ... power supply circuit 131 ... battery 200 ... proximity communication means 201 ... loop antenna 202 ... power Receive coil 301... Processing program data 302... Data reception mode flag column 303 .. own card data 304 .. partner card data 400 .. external communication medium 500 .. external charger OSC- 1, OSC-2, OSC-3... Oscillator circuit

Claims (5)

  An electronic circuit comprising at least a display device, an arithmetic processing unit, a communication control circuit and a power supply circuit including a battery, and a loop antenna for non-contact proximity communication are embedded, and includes an operation unit having a power activation unit and a reception operation unit. An IC card type non-contact communication medium, and when the electronic circuit is activated by the power activation means and the data reception mode is initiated by the reception operation means, a data reception mode flag is set and the proximity within 2 cm Non-contact proximity communication for exchanging data with an external communication medium disposed in the card, and firstly, card data request inquiry data is transmitted to the external communication medium, and a card data request command according to a response from the external communication medium is transmitted. If received, it sends its own card data to the external communication medium, sets a data reception mode flag, and receives the data. If the mode flag is set, the non-contact communication medium and displaying on the display device receives the opponent's card data by sending a card data request command to the external communications medium.   2. The non-contact communication medium according to claim 1, wherein the communication control circuit has a communication mode in which the communication control circuit operates as a reader / writer in the reader / writer communication standard, and the arithmetic processing unit has a peer-to-peer communication standard. A non-contact communication medium characterized by performing control for switching a reader / writer communication standard.   3. The contactless communication medium according to claim 1, wherein the power supply circuit has a power receiving coil, and the power receiving coil receives power from an external charger by electromagnetic induction to charge the battery. A non-contact communication medium characterized by.   An electronic circuit comprising at least a display device, an arithmetic processing unit, a communication control circuit and a power supply circuit including a battery, and a loop antenna for non-contact proximity communication are embedded, and includes an operation unit having a power activation unit and a reception operation unit. A communication method using a non-contact communication medium, wherein when the electronic circuit is activated by the power activation means and a data reception mode is initiated by the reception operation means, a data reception mode flag is set and within 2 cm Performs contactless proximity communication for exchanging data with an external communication medium arranged in the vicinity, first transmits data request inquiry data to the external communication medium, and receives a data request command as a response of the external communication medium The data reception mode flag is set after transmitting its own data to the external communication medium, and the data reception mode flag is If it is Tsu, communication method and displaying on the display device receives the other party of the data by sending the external communication medium data request command.   5. The communication method according to claim 4, wherein when a total processing time limit set for the total time spent for communication processing has elapsed, the data reception mode is terminated and the data reception mode flag is deleted.

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