JP2009302863A - Cellular phone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cellular phone that eliminates a risk that a user simultaneously touches a signal electrode for electric field communication and a ground electrode when using the cellular phone with hands, which is a normal use, and also can sufficiently show electric field communication performance in an electric field communication dual-purpose cellular phone. <P>SOLUTION: The signal electrode 111 for electric field communication and the ground electrode 113 are incorporated or installed each in a portion where hands do not abut simultaneously in the cellular phone in a state where the cellular phone is unused, for connecting to a transceiver in the cellular phone 11 incorporating a transceiver 117 for performing electric field communication and a computer 118 for controlling the electric field communication. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mobile phone having a built-in electric field communication function for performing electric field communication via an electric field transmission medium at a close distance.

  In recent years, an IC card type portable terminal in which a microchip CPU as a wearable computer that performs electric field communication and a transceiver that performs electric field communication is incorporated into one card has been developed. Japanese Patent Laying-Open No. 2006-86584 (Patent Document 1) describes such a portable terminal.

  In the conventional portable terminal 101, as shown in FIG. 21, if the user 102 is carrying it, a part of the body of the user 102 touches the electric field communication electrode 104 of another electric field communication device 103, so that the transmission path 105 is formed, electric field communication is started, and conversely, the electric field communication can be ended by leaving the electric field communication electrode 104.

  Therefore, in FIG. 21, when an electric field communication device 103 provides a security service in which only a registered ID person is allowed to enter and leave the room as an entrance / exit management device for a room, the electric field communication technology is as follows. Can be used. An ID number assigned for each user is registered in the portable terminal 101 carried by the user 102. Then, the transmitter / receiver of the electric field communication device 103, at least the electric field communication electrode 104, is installed on the door 106 at the entrance or the wall near the door, and the mobile phone in which the ID number of the user 102 permitted to enter the room is registered. In the case of the terminal 101, when the user carrying it touches the electric field communication electrode 104 on the door 106 or the wall, electric field communication is performed between the portable terminal 101 and the electric field communication device 103, ID authentication processing is performed, and authentication is performed. If established, the electric field communication device 103 permits the door lock to be released and releases the door lock, thereby enabling the user 102 to open the door, or opening the automatic door.

  In this way, by bringing a portable terminal capable of electric field communication to the user, the original doorknob can be obtained without requiring the user to perform any ID input operation or to make the security IC card approach or insert the security IC card. There is the convenience that ID verification can be completed automatically only by an operation of unlocking the door by opening the door simply by touching the button, or an operation of approaching the automatic door.

  On the other hand, in recent years, there has been a remarkable spread of mobile phones, and almost everyone has carried them. Therefore, if the electric field communication function is built in the mobile phone, the user is freed from the trouble of carrying two mobile devices, ie, the mobile phone and the mobile terminal for electric field communication at the same time.

However, when an electric field communication function is built in a mobile phone, the mobile phone is used by a user, so the signal electrode and the ground electrode for electric field communication are exposed on the surface of the mobile phone. In addition, it is inevitable that the user's hand as a conductor touches these electrodes at the same time, and as a result, the electric field communication performance cannot be sufficiently exhibited.
JP 2006-86584 A

  The present invention has been made in view of the above-described problems of the prior art, and is a mobile phone for electric field communication, which is used for electric field communication when a user uses it in his / her hand which is a normal usage mode of the mobile phone. It is an object of the present invention to provide a mobile phone that can fully exhibit electric field communication performance without fear of simultaneously touching a signal electrode and a ground electrode.

  One feature of the present invention is a mobile phone incorporating a transceiver for performing electric field communication and a computer for controlling electric field communication, wherein a signal electrode and a ground electrode for electric field communication are respectively used in a non-use state of the mobile phone. The cellular phone is built in or installed in a portion of the cellular phone where human hands do not contact at the same time and is connected to the transceiver.

  In the mobile phone of the invention, the mobile phone is a foldable mobile phone, wherein one of the signal electrode for electric field communication and the ground electrode is a front side portion in the folded state of the mobile phone, and the other is a back side portion. Can be installed.

  In the mobile phone of the above invention, the mobile phone is a sliding open / close type mobile phone or a display unit rotating open / close type mobile phone, and the signal electrode for electric field communication is installed on a back surface portion of the operation unit of the mobile phone. The ground electrode can be installed on the back portion of the sliding or rotating display unit of the mobile phone.

  In the mobile phone according to the invention, the mobile phone is a straight type mobile phone in which a display unit and an operation unit are arranged vertically on the same surface, and an electrode thin film as a signal electrode for electric field communication. Is mounted on the operation unit of the mobile phone, and the ground electrode for electric field communication is installed on the back surface portion of the display unit of the mobile phone.

  In the mobile phone of the invention, the signal electrode and the ground electrode may be provided with a slit for passing a radio signal for a mobile phone and a radio signal for a non-contact IC card incorporated in the mobile phone. it can.

  Further, in the mobile phone of the above invention, the external signal electrode is incorporated in one of the microphone or the earphone of the external earphone microphone for telephone, the external ground electrode is incorporated in the other of the microphone or the earphone, and the signal of the external earphone microphone is incorporated. A cord for the electric field communication signal may be incorporated in the cord.

  In the mobile phone of the above invention, an electric field in which an external signal electrode and an external ground electrode are stacked via an insulating layer and incorporated in a business card size card, and one end is connected to the external signal electrode and the external ground electrode. The other end of the communication signal cord may be connected to the external connection connector of the mobile phone.

  Furthermore, in the mobile phone of the invention, an external ground electrode is incorporated in a hand strap, the hand strap is connected to a hand strap connection portion of the mobile phone, and the hand strap connection portion is electrically connected to a transceiver in the mobile phone. Can be connected to.

  According to the present invention, the mobile phone of any of the folding type, sliding open / close type, display unit rotary open / close type, and straight type can be used as an original mobile phone by incorporating an electric field communication function, or for electric field communication. It can be used as a portable terminal, and there is no fear of touching the signal electrode and ground electrode for electric field communication at the same time when the user holds it in the hand, which is the normal usage mode of the mobile phone, and the electric field communication performance is sufficient. It can be demonstrated.

  In addition, according to the present invention, by incorporating an external signal electrode and a ground electrode into an external earphone microphone for a mobile phone, if the external signal electrode and the ground electrode are connected to the earphone microphone connection connector of the mobile phone, stable electric field communication is achieved with the internal electrode. Stable electric field communication is possible even when it is impossible.

  Further, according to the present invention, an external signal electrode and an external ground electrode are laminated via an insulating layer, incorporated in a business card size card, and one end connected to the external signal electrode and the external ground electrode. By connecting the other end of the cord to the connection terminal and connecting it to the external connection connector of the mobile phone, stable electric field communication is possible even if the internal electrode cannot perform stable electric field communication become.

  Furthermore, according to the present invention, if an external ground electrode is incorporated in a hand strap and this hand strap is connected to a mobile phone, the ground electrode for electric field communication can be strengthened, and stable electric field communication cannot be performed with the internal electrode. Even in this case, stable electric field communication is possible.

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

  <First Embodiment> FIG. 1 shows the appearance of a foldable mobile phone 11 having a built-in electric field communication function according to a first embodiment of the present invention, and FIG. 2 is a block diagram thereof. As shown in FIGS. 1A and 1B, the cellular phone 11 incorporating the electric field communication function has the signal electrode plate 111 for electric field communication in the folded state of the telephone 11 (the back side of the operation unit 112). The ground electrode plate 113 for electric field communication is installed on almost one surface of the telephone 11 in the folded state (back side of the display unit 114), and is electrically connected to a transceiver described later. is there. By installing the signal electrode plate 111 and the ground electrode plate 113 for electric field communication in such a positional relationship, the user holds the operation unit 112 in the hand of the mobile phone 11 as shown in FIG. In a state where the display unit 114 is opened and used, the user's hand does not touch the signal electrode plate 111 and the ground electrode plate 113 at the same time to make a short-circuit state, and electric field communication with a weak electric field communication signal is possible. To do.

  As shown in FIG. 2, the mobile phone 11 includes a mobile phone unit 115 that controls signal processing and various functions for mobile phone communication, a battery 117 as a power source, and a transceiver 117 that controls an electric field communication function. And a signal electrode plate (S) 111 for electric field communication and a ground electrode plate (G) 113 are connected to the transceiver 117.

  As shown in FIGS. 3A to 3D, the signal electrode plate 111 can be provided in the form of slits SLa to SLd. The slits SLa to SL9d are provided so that the signal electrode plate 111 does not hinder transmission / reception of a radio signal for the mobile phone 11 and a radio signal for a non-contact IC card or the like built in the mobile phone 11. The form of the slit SL is not limited to the illustrated one.

  Next, with reference to FIG. 4, electric field communication operation when the mobile phone 11 of the present embodiment is used as an electric field communication terminal and as an ID authentication device and the door unlocking of the security zone is performed will be described. On the wall near the door 5 in the security zone, an electric field communication transceiver 6 for performing electric field communication with the electric field communication portable terminal 1 is installed, and a control device 7 constituted by a computer is connected to the electric field communication transceiver 6. Connected via a network such as a LAN.

  The transceiver 6 for electric field communication uses a signal detection technique based on an electro-optical technique using a laser beam and an electro-optic crystal, and induces an electric field based on information to be transmitted on a living body which is an electric field transmission medium. It is a transceiver that transmits and receives information by using a generated electric field. The electrolytic communication transceiver 117 inside the mobile phone 11 has the same internal configuration.

  As shown in FIG. 5, the electric field communication transceiver 6 receives the transmission data from the control device 7, which is a computer, via the input / output (I / O) circuit 601, and transmits the transmission data via the transmission unit 602. The electric field is supplied to the transmission / reception electrode 603, an electric field is induced in the electric field transmission medium A through the transmission / reception electrode 603 and the insulating film 604, and the electric field is transmitted to other parts of the electric field transmission medium A. Further, the electric field induced and transmitted by the electric field transmission medium A is detected by the transmission / reception electrode 603 through the insulating film 604, and this electric field is coupled to the electric field detection optical unit 605 and converted into an electric signal. The electric signal is subjected to signal processing such as amplification and noise removal by the signal processing circuit 606, and further shaped by the waveform shaping circuit 607, and then the control device via the input / output (I / O) circuit 601. 7 is output. The control device 7 performs door lock release control of the security door 5 if ID verification described later is established.

  As shown in FIG. 4, if a legitimate user A approaches the security door 5 in the security zone and touches the electrode 603 portion of the electric field communication transceiver 6, the door lock of the security door 5 is performed by the following ID verification process. Release control is performed. It is assumed that the mobile phone 11 with built-in electric field communication function of the present embodiment is put in the pocket of the clothes of user A. User A may hold mobile phone 11 in his hand.

  When the user A contacts the electrode 603 of the electric field communication transceiver 6, the ID signal is transmitted to the control device 7 through the human body of the user A and the transceiver 6. Then, when receiving the ID signal, the control device 7 transmits a Received signal to the mobile phone 11. The transceiver 117 built in the mobile phone 11 receives the received signal and transfers it to the computer 118. The computer 118 receives the signal and generates an action signal. The transceiver 117 and the signal electrode plate 111 transmit the signal to the control device 7. Send. Then, when receiving the Action signal, the control device 7 transmits a lock release control signal to the security door 5, and the security door 5 releases the door lock.

  Next, the normal process of FIG. 4 will be described in more detail. FIG. 6 is a sequence diagram of normal processing. FIG. 7 shows a packet configuration example of various signals transmitted and received between the computer 118 for electric field communication built in the mobile phone 11 and the control device 7. As shown in FIG. 7 (0), the basic configuration of the packet is that the ID information of the electric field communication computer 118 built in the mobile phone 11, the ID information of the control device 7, the Received flag, the Action flag, and the time information. , Parity.

  First, a user A who carries a mobile phone 11 with built-in electric field communication function receives an electrode 603 and an insulating film 604 (hereinafter referred to as “electrode 603” of the transceiver 6 for electric field communication installed on the wall or floor in front of the security door 5. Etc.))). Thereby, between the computer 118 for electric field communication in the mobile phone 11 and the control device 7, the transceiver 117 for electric field communication built in the mobile phone 11, the human body of the user A as the electric field transmission medium, and the transceiver 6 are connected. A communication path is established. Then, the ID signal shown in FIG. 7A is transmitted from the computer 118 to the control device 7 via the communication path (S11). That is, the computer 118 built in the mobile phone 11 generates and transmits an ID signal in which the ID stored in the storage unit and the parity are set.

  And the signal transmission part 71 of the control apparatus 7 will discriminate | determine whether ID of the said ID signal is a valid ID memorize | stored in the ID memory | storage part 73, if an ID signal is received (S12). In the case of the ID stored in the ID storage unit 73, the signal transmission unit 71 transmits the Received signal shown in FIG. 7 (2) to the mobile phone 11 via the communication path (S13). The signal transmission unit 71 sets the ID of the control device 7, the received flag, and the reception time of the ID signal in the packet of the ID signal transmitted from the mobile phone 11, and generates a received signal in which the parity is set. ,Send. It is assumed that the ID of the control device 7 is stored in a storage device such as a memory.

  The Received flag is a flag indicating that the ID is a valid ID stored in the ID storage unit 73. In the case of an ID signal of an illegal ID that is not stored in the ID storage unit 73, the signal transmission unit 71 transmits a Received signal for which the Received flag is not set, or does not transmit a Received signal.

  Then, the computer 118 for electric field communication built in the mobile phone 11 receives the Received signal. When the computer 118 receives the received signal in which the received flag is set, the computer 118 transmits the action signal shown in FIG. 7 (3) to the control device 7 through the communication path (S14). In other words, an action flag is set in the received signal packet transmitted from the control device 7, and an action signal packet in which parity is set is generated and transmitted.

  Note that the computer 118 does not transmit an Action signal when a Received signal for which the Received flag is not set is received or when a Received signal is not received.

  And the control part 72 of the control apparatus 7 will transmit the control signal of a door lock cancellation | release to the security door 5, and will release a door lock, if an Action signal is received (S15). Further, the control unit 72 stores the log information (FIG. 7 (4)) in which the parity information is set by rewriting the time information of the received packet of the Action signal to the time of receiving the Action signal in the log information storage unit 74.

  Through the normal processing described above, the control device 7 transmits the door lock release control signal to the security door 5 when the user A carrying the mobile phone 11 incorporating the electric field communication function contacts the transceiver 6 to Release the lock.

  Thus, according to the mobile phone 11 of the present embodiment, since the electric field communication function is built in, it is possible to eliminate the uncomfortable feeling when carrying the electric field communication terminal separately from the mobile phone 11 and carrying it at the same time. Moreover, since the mobile phone 11 is rarely forgotten as an indispensable item in daily life, it is easy to forget to place it in a home if it is a separate electric field communication terminal from the mobile phone 11, and forget to change when changing clothes. Without forgetting to carry around when going out, the convenience as a mobile phone and the convenience as an electric field communication terminal can be fully exhibited.

  Further, according to the mobile phone 11 of the present embodiment, the signal electrode plate 111 for electric field communication is provided along the back side of the operation unit 112, and the ground electrode plate is provided on the back side of the display unit 114 opposite to the signal electrode plate 111. Since 113 is provided, when the user holds the mobile phone 11 in his / her hand, the hand always touches the signal electrode plate 111 and electric field communication can be performed reliably. In addition, since the signal electrode plate 111 and the ground electrode plate 113 are arranged so that they are hardly touched by a user's hand at the same time, highly reliable electric field communication can be performed.

  Furthermore, according to the mobile phone 11 of the present embodiment, the signal electrode plate 111 is provided with a slit SL that allows a wireless signal for a mobile phone and a wireless signal for a non-contact IC card or the like built in the mobile phone to pass therethrough. There is an advantage that the original wireless communication function of the mobile phone 11 is not hindered.

  Furthermore, in the above embodiment, the folding mobile phone 11 has a built-in electric field communication function, and the signal electrode plate 111 and the ground electrode plate 113 for electric field communication are installed in appropriate portions. It is characterized by. However, there are various types of mobile phones. And it is necessary to install an electrode in an appropriate place with respect to each type of mobile phone.

  <Second Embodiment> FIG. 8 shows a straight type mobile phone 11A according to a second embodiment of the present invention. Also in the present embodiment, the electric field communication function built in together with the mobile phone function is common to the first embodiment. The cellular phone 11A of the present embodiment is characterized by the configuration of the electrode for electric field communication, and the signal electrode thin film 11A1 for electric field communication is plated on the surface of each operation button of the operation unit 11A2 of the cellular phone 11A. Then, the ground electrode plate 11A3 for electric field communication is installed on the back surface portion of the display portion 11A4 of the mobile phone 11A, and the signal electrode thin film 11A1 and the ground electrode plate 11A3 are connected to the mobile phone 11A as in the first embodiment. It is in the point connected to the transceiver 117 built in the terminal. In the second embodiment, the signal electrode thin film 11A1 for electric field communication may not be made of metal plating but may be formed by coating a conductive plastic.

  Even in the cellular phone 11A of the present embodiment, the same operations and effects as the first embodiment can be obtained. Also in the present embodiment, as in the case of the first embodiment, by providing the slits of each aspect as illustrated in FIG. 3, the original radio telephone communication function of the mobile phone 11A is obstructed. There are no advantages.

  <Third Embodiment> FIG. 9 shows a slide opening / closing type cellular phone 11B in which a display unit 11B2 is slidable on the front surface of an operation unit 11B1 according to a third embodiment of the present invention. Also in the present embodiment, the electric field communication function built in together with the mobile phone function is common to the first embodiment. The cellular phone 11B according to the present embodiment is also characterized by the configuration of the electrode for electric field communication. The signal electrode plate 11B3 for electric field communication is installed almost on the back side of the operation unit 11B1 of the cellular phone 11B. The ground electrode plate 11B4 is installed between the back surface portion of the display unit 11B2 of the mobile phone 11B, and therefore between the operation unit 11B1 and the display unit 11B2, and the signal electrode plate 11B3 and the ground electrode plate 11B4 are installed in the first embodiment. Similar to the embodiment, it is connected to the transceiver 117 built in the mobile phone 11B.

  Even in the cellular phone 11B of the present embodiment, the same operations and effects as the first embodiment can be obtained. Also in the present embodiment, as in the case of the first embodiment, the slits of the respective modes as illustrated in FIG. 3 are provided in the electrode plates 11B3 and 11B4, so that the original radio of the cellular phone 11B is provided. There is an advantage that the communication function is not hindered.

  <Fourth Embodiment> FIGS. 10 and 11 show a mobile phone 11C of a slide part rotation opening / closing type according to a fourth embodiment of the present invention. As shown in FIG. 11, the mobile phone 11C of the sliding part rotation opening / closing type can display the operation part 11C1 by rotating the display part 11C2 connected to the front surface of the operation part 11C1, and can perform a number input operation. It is what I did.

  Also in the cellular phone 11C of the present embodiment, the electric field communication function built in together with the cellular phone function is the same as that of the first embodiment. The feature of the cellular phone 11C of the present embodiment is also the configuration of the electrode for electric field communication, and the signal electrode plate 11C3 for electric field communication is installed almost on the back side of the operation unit 11C1 of the cellular phone 11C. The ground electrode plate 11C4 is installed between the back surface portion of the display unit 11C2 of the mobile phone 11C, and therefore between the operation unit 11C1 and the display unit 11C2, and the signal electrode plate 11C3 and the ground electrode plate 11C4 are installed in the first embodiment. Similar to the embodiment, it is connected to the transceiver 117 built in the mobile phone 11C.

  Even in the cellular phone 11C of the present embodiment, the same operations and effects as those of the first embodiment can be obtained. Also in the present embodiment, as in the case of the first embodiment, the slits of the respective modes as illustrated in FIG. 3 are provided in the electrode plates 11C3 and 11C4, so that the original radio of the mobile phone 11C is provided. There is an advantage that the communication function is not hindered.

  <Fifth Embodiment> A cellular phone 11 according to a fifth embodiment of the present invention will be described with reference to FIGS. The shape of the mobile phone 11 of this embodiment may be any of a foldable type, a slide open / close type, a display unit rotary open / close type, and a straight type, like the mobile phone of the first to fourth embodiments. Good. The first to fourth embodiments also include an electric field communication function and internal electrodes 111 and 113 for electric field communication as well as the first embodiment in addition to the mobile phone function. And in common.

  However, in the case of the cellular phone 11 of the fifth embodiment, the internal circuit for the electric field communication function includes an impedance compensation circuit 119 in addition to the transceiver 117 and the computer 118 as shown in FIG. The computer 118 determines whether the external electrodes 121 and 122 are connected according to the shape of the terminal 123 of the external device connected to the earphone microphone connector 120 and how much the impedance is compensated according to the pin assignment. The impedance compensation circuit 119 is characterized in that impedance compensation is performed.

  The connection terminal 120 of the normal earphone microphone can be connected to the connector 120 for connecting the earphone microphone of the mobile phone 11 according to the present embodiment. Alternatively, as shown in FIG. 13, the earphone portion 21 of the earphone microphone can be connected to the external for electric field communication. The connection terminal 123 of the earphone microphone with an electrode in which the signal electrode 121 is installed and the external ground electrode 122 for electric field communication is installed in the microphone portion 22 can also be connected.

  As shown in FIG. 13, in the mobile phone 11, an impedance compensation circuit 119 is provided in addition to the mobile phone unit 115, the battery 116, and the transceiver 117 and the computer 118 similar to those of the first embodiment. . The external electrode connection connector 120 is connected to the computer 118, and the impedance of the external terminal 123 connected to the connector 120 is identified by the ID number, and the ID-to-impedance compensation value registered in the computer 118 is registered. Based on the data, an impedance compensation value command corresponding to the ID number of the connected connection terminal 123 is given to the impedance compensation circuit 119, and the impedance of the input signal from the external electrodes 121 and 122 is compensated. The same level of transmission / reception signals for electric field communication are provided. Reference numeral 125 is an electrode switching circuit for switching between the external electrode and the internal electrode, and 126 is an external electrode ID identification circuit for identifying the ID number of the external terminal.

  The pin assignment in the external electrode ID identification circuit 126 of the connection terminal 123 of the external electrode will be described with reference to FIGS. Input / output terminals I / O2, I / O1, and I / O0 are provided on the electric field communication computer 118 side of the mobile phone 11, and if the corresponding jumper pins of the external electrode ID identification circuit 126 are grounded, 0, 1 when open. Therefore, in FIG. 14A, since all three jumper pins are in a ground short-circuit state, “000” is obtained, and ID number = 0 is obtained from the table of FIG. The computer 118 reads the impedance compensation value for ID number = 0 from the stored table, and instructs this to the impedance compensation circuit 119. The impedance compensation circuit 119 is instructed about the impedance of the connected external electrodes 121 and 122. Compensation is performed using the compensation value, and the strength of signals from the electrodes 121 and 122 and signals to the electrodes 121 and 122 are optimized.

  Since the ID numbers of the external electrode connection terminals 123A shown in FIG. 14B are I / O0 = 1, I / O1 = 0, and I / O2 = 0, the ID number = 1 from the table of FIG. In this case, the computer 118 reads out the impedance compensation value set and registered in advance for the ID number = 1 and instructs the impedance compensation circuit 119 to connect the impedance compensation circuit 119 to the connected external electrodes 121 and 122. The impedance is compensated with a compensation value instructed by the computer 118, and the signals from the electrodes 121 and 122 and the signals to the electrodes 121 and 122 are optimized.

  In the case of the present embodiment, in the case of a normal earphone microphone not provided with the external electrodes 121 and 122, the connection number 123 is not provided with the ID number identification circuit 126, and therefore there is no ground short circuit. The input of I / O0, I / O1, I / O2 of the computer 118 is “111”, and the ID number = 15 with reference to the table of FIG. In this case, the computer 118 determines that the external terminal is not connected, and the impedance compensation circuit 119 outputs the impedance compensation value set for the internal electrodes 111 and 113.

  According to the present embodiment, in addition to the effects and effects of the first to fourth embodiments described above, the situation and environment in which electric field communication using the internal electrodes 111 and 113 cannot perform sensitive communication is possible. In this case, the communication can be switched to communication using the external electrode by using the earphone 21 / microphone 22 provided with the external electrodes 121, 122 and connecting the external connection terminal 123 to the earphone / microphone connector 120 on the mobile phone 11 side. This is advantageous in that it enables electric field communication with high sensitivity.

  <Sixth Embodiment> A cellular phone 11 according to a sixth embodiment of the present invention will be described with reference to FIGS. As in the fifth embodiment, the feature of this embodiment is the structure of the external electrode used when the sensitivity of electric field communication at the internal electrodes 111 and 113 is poor.

  The shape of the mobile phone 11 of this embodiment may be any of a foldable type, a slide open / close type, a display unit rotary open / close type, and a straight type, like the mobile phone of the first to fourth embodiments. Good. The first to fourth embodiments also include an electric field communication function and internal electrodes 111 and 113 for electric field communication as well as the first embodiment in addition to the mobile phone function. And in common. However, in the case of the mobile phone 11 of the sixth embodiment, an external electrode / internal electrode switching connector 120A is provided.

  As shown in FIG. 16, in the cellular phone 11 according to the present embodiment, the insertion pins 123A1 and 123A2 provided on the external electrode connection terminal 123A are inserted into the pin holes of the external electrode / internal electrode switching connector 120A. As shown in FIG. 17, the switching contacts 120A1 and 120A2 are separated from the internal electrodes 111 and 113 and contact the insertion pins 123A1 and 123A2 of the inserted external electrode connection terminal 123A to connect the external electrodes 121 and 122 to the transceiver 117. Electric field communication is performed through the external electrodes 121 and 122.

  Thus, according to the mobile phone 11 of the present embodiment, in addition to the effects and effects of the first to fourth embodiments, the electric field communication using the internal electrodes 111 and 113 has a sensitivity. In a situation or environment where good communication is not possible, the external connection terminal 123A to which the external electrodes 121 and 122 are connected is connected to the external connection connector 120A prepared in advance in the mobile phone 11, thereby switching to communication using the external electrodes. There is an advantage that electric field communication with high sensitivity is possible.

  In the present embodiment, the portion of the external connection connector 120A of the mobile phone 11 may use an earphone / microphone connection connector, or may be provided as a completely new connector.

  <Seventh Embodiment> A cellular phone 11 according to a seventh embodiment of the present invention will be described with reference to FIG. As in the fifth embodiment, this embodiment also has a feature in the structure of the external electrode used when the sensitivity of electric field communication at the internal electrodes 111 and 113 is poor.

  The shape of the mobile phone 11 of this embodiment may be any of a foldable type, a slide open / close type, a display unit rotary open / close type, and a straight type, like the mobile phone of the first to fourth embodiments. Good. The first to fourth embodiments also include an electric field communication function and internal electrodes 111 and 113 for electric field communication as well as the first embodiment in addition to the mobile phone function. And in common. However, in the case of the cellular phone 11 of the seventh embodiment, an external electrode / internal electrode switching connector 120B is provided.

  As shown in FIG. 18, in the mobile phone 11 of the present embodiment, an electrode connection notification circuit 127 is provided in the external electrode connection terminal 123B, and the electric field communication unit of the mobile phone 11 is the same as that of the first embodiment. In addition to the transceiver 117 and the computer 118, an impedance compensation circuit 119, an impedance measurement circuit 1110, and an impedance measurement switch 1111 are provided.

  In the mobile phone 11 of the present embodiment, the computer 118 determines that the external electrode connection terminal 123B is connected to the external connection connector 120B based on the presence / absence of a short circuit between the I / O port and the ground. When the computer 118 determines that the external electrode connection terminal 123B is connected, the impedance measurement switch 1111 is temporarily switched from the impedance compensation circuit 119 side to the impedance measurement circuit 1110 to measure the impedance of the external electrodes 121 and 122. Make it. When the impedance measurement is completed, the computer 118 returns the impedance measurement switch 1111 to the impedance compensation circuit 119 side, and connects the external electrodes 121 and 122 to the impedance compensation circuit 119. Further, the computer 118 finds an impedance compensation value corresponding to the measured impedance value of the external electrodes 121 and 122 and passes it to the impedance compensation circuit 119. As in the case of the fifth embodiment, the impedance compensation circuit 119 compensates the impedance of the connected external electrodes 121 and 122 with the compensation value instructed by the computer 118, and the signal from the electrodes 121 and 122, In addition, the signals to the electrodes 121 and 122 are optimized.

  In the case of the present embodiment as well, as in the case of the fifth embodiment, in the case of a normal earphone microphone that is not provided with the external electrodes 121 and 122, the connection terminal 123B is provided with an electrode connection notification circuit 127. Therefore, there is no ground short-circuit, and the computer 118 does not sense the connection of the external electrode terminal, and therefore the impedance measurement switch 1111 is not switched to the impedance measurement circuit 1110 side. In this case, electric field communication is performed using the internal electrodes 111 and 113.

  According to the present embodiment, in addition to the effects and effects of the first to fourth embodiments described above, the situation and environment in which electric field communication using the internal electrodes 111 and 113 cannot perform sensitive communication is possible. In this case, it is possible to switch to communication using external electrodes by using an external earphone microphone with external electrodes 121 and 122 and connecting the external connection terminal 123B to the earphone microphone connection connector 120B on the mobile phone 11 side. There is an advantage that enables electric field communication with high sensitivity.

  Even in the present embodiment, the portion of the external connection connector 120B of the mobile phone 11 may use an earphone / microphone connection connector, or may be provided as a completely new connector.

  <Eighth Embodiment> A cellular phone 11 according to an eighth embodiment of the present invention will be described with reference to FIG. The present embodiment is characterized in that the external electrodes 121A and 122A are made into a business card size card type and are connected to an external connection terminal 123 for connecting to the external connection connector 120 of the mobile phone 11. The card-type external electrodes 121A and 122A as in the present embodiment can be connected to the cellular phone 11 of the fifth to seventh embodiments through the connection terminal 123A.

  Note that the structure of the connection terminal 123A may be any of the fifth embodiment, the sixth embodiment, and the seventh embodiment. Further, the external connection connector 120 may be an earphone / microphone connection connector conventionally provided in the mobile phone 11 or may be a newly provided connector.

  Further, even in the present embodiment, the shape of the mobile phone 11 is a folding type, a slide opening type, a display unit rotation opening type, a straight type, like the mobile phone of the first to fourth embodiments. Either may be sufficient.

  <Ninth Embodiment> A cellular phone 11 according to a ninth embodiment of the present invention will be described with reference to FIG. The mobile phone 11 according to the present embodiment is provided with a ground electrode 131 incorporated in the hand strap outside, and an external electrode connecting connector 132 is provided on the mobile phone 11 side at the hand strap connection portion. The connection terminal 133 is connected.

  The shape of the mobile phone 11 may be any of a foldable type, a slide open / close type, a display unit rotary open / close type, and a straight type as in the mobile phone of the first to fourth embodiments. In addition, the mobile phone 11 is provided with the electric field communication function and the internal electrodes 111 and 113 for electric field communication as well as the mobile phone function in the first to fourth embodiments. And in common. In the present embodiment, it is assumed that the external ground electrode 131 is always connected to the ground electrode 113 built in the mobile phone 11.

  In the case of this embodiment, by providing the ground electrode 131 as an external electrode in the hand strap portion, the ground electrode can be kept away from the user who is a living body when used as an electric field communication device, and the electric field communication is stabilized. I can plan.

<Other embodiments>
While the embodiments of the present invention have been described above, various modifications and changes can be made to the embodiments of the present invention without departing from the spirit of the present invention. In the above embodiment, the electric field communication technology using the ID number for opening and closing the automatic door and the automatic lock door is illustrated. However, the present invention is not limited to this. For example, the electric field communication electrode installed on the printer side is portable. If the user carrying the telephone touches, the present invention can be applied to a document printing system in which the user's document is designated by the ID number registered in the mobile telephone and printed out.

FIGS. 1A and 1B are a side view of a cellular phone according to a first embodiment of the present invention in a folded state and a side view in an unfolded state. FIG. 2 is a circuit block diagram of the mobile phone according to the above embodiment. FIGS. 3A to 3D are explanatory diagrams showing modifications of the slits of the signal electrode plate for electric field communication and the ground electrode plate used in the mobile phone according to the embodiment. FIG. 4 is an explanatory diagram illustrating a usage mode used for unlocking a door of a security door using the mobile phone according to the embodiment. FIG. 5 is a block diagram of a transceiver and a control device that perform electric field communication with the mobile phone of the above embodiment and perform door lock release control of the security door. FIG. 6 is a sequence diagram of normal operation between the mobile phone according to the embodiment and the transceiver and the control device that perform electric field communication for door lock release control of the security door. FIG. 7 is a packet configuration diagram of various signals used during normal operation between the mobile phone of the embodiment and the transceiver and the control device that perform electric field communication for door lock release control of the security door. FIGS. 8A and 8B are a front view and a side view of a straight type mobile phone according to the second embodiment of the present invention. FIGS. 9A and 9B are side views of the housed state and the withdrawn state of the slide openable mobile phone according to the third embodiment of the present invention. FIGS. 10A and 10B are side views of the housed state and the rotated and unfolded state of the display unit rotation opening and closing type mobile phone according to the fourth embodiment of the present invention. FIG. 11 is an explanatory diagram of a method of using the mobile phone according to the fourth embodiment. FIG. 12 is a front view of a state in which an external electrode serving also as an earphone microphone is connected to the mobile phone according to the fifth embodiment of the present invention. FIG. 13 is a circuit block diagram of the mobile phone according to the fifth embodiment. FIG. 14 is a circuit block diagram for explaining an ID number identification mechanism of an external electrode of the mobile phone according to the fifth embodiment. FIG. 15 is a table showing a correspondence relationship between ID numbers of external electrodes and pin assignments of the mobile phone according to the fifth embodiment. FIG. 16 is a block diagram showing a connection structure of external electrodes of a mobile phone according to a sixth embodiment of the present invention. FIG. 17 is an explanatory diagram illustrating a connection state between an external electrode terminal pin and an external connection connect in the mobile phone according to the sixth embodiment. FIG. 18 is a circuit block diagram of a mobile phone and external electrodes according to the seventh embodiment of the present invention. FIG. 19 is an explanatory diagram of a mobile phone and external electrodes according to the eighth embodiment of the present invention. FIG. 20 is an explanatory diagram of a mobile phone according to the ninth embodiment of this invention. FIG. 21 is an explanatory diagram of a conventional electric field communication system.

Explanation of symbols

5 Security door 6 Transceiver 7 Control device 11, 11A, 11B, 11C Mobile phone 111, 11B3, 11C3 Signal electrode plate 11A1 Signal electrode thin film 112, 11A2, 11B1, 11C1 Operation unit 113, 11A3, 11B4, 11C4 Ground electrode plate 114, 11A4, 11B2, 11C2 Display unit 115 Mobile phone unit 116 Battery 117 Transceiver 118 Computer 119 Impedance compensation circuit 1110 Impedance measurement circuit 1111 Impedance measurement switch 120, 120A, 120B, 132 External connection connector 121, 121A External signal electrode 122, 122A, 131, 133 External ground electrode 123, 123A, 123B External connection terminal 125 Electrode switching circuit 126 External electrode identification circuit 127 Electrode connection circuit A User SLa to SLd Slit

Claims (8)

In a mobile phone incorporating a transceiver for performing electric field communication and a computer for controlling electric field communication,
A cellular phone characterized in that a signal electrode and a ground electrode for electric field communication are respectively built in or installed in a portion of the cellular phone that is not in contact with human hands when the cellular phone is not used, and connected to the transceiver.   The mobile phone is a foldable mobile phone, wherein one of the signal electrode and the ground electrode for electric field communication is installed on the front side portion in the folded state of the mobile phone, and the other is installed on the back side portion. The mobile phone according to claim 1.   The mobile phone is a slide open / close type mobile phone or a display unit rotary open / close type mobile phone, the signal electrode for electric field communication is installed on a back surface portion of the operation unit of the mobile phone, and the ground electrode for electric field communication is connected to the mobile phone. The mobile phone according to claim 1, wherein the mobile phone is installed on a back surface portion of a sliding or rotating display unit.   The mobile phone is a straight type mobile phone in which a display unit and an operation unit are arranged vertically on the same surface, and an electrode thin film as a signal electrode for electric field communication is covered on the operation unit of the mobile phone. 2. The mobile phone according to claim 1, wherein the ground electrode for electric field communication is installed on a back surface portion of a display unit of the mobile phone.   5. The signal electrode and the ground electrode are each provided with a slit through which a radio signal for a mobile phone and a radio signal for a non-contact IC card built in the mobile phone pass. Mobile phone.   An external signal electrode is incorporated in one of the microphones or earphones of an external earphone microphone for telephones, an external ground electrode is incorporated in the other of the microphones or earphones, and a cord for the electric field communication signal is added to the signal cord of the external earphone microphone. 6. The mobile phone according to claim 1, wherein the mobile phone is incorporated.   The external signal electrode and the external ground electrode are stacked via an insulating layer, and are built in a card of a business card size, and the other end of the electric field communication signal cord having one end connected to the external signal electrode and the external ground electrode is connected to the external signal electrode. The mobile phone according to claim 1, wherein the mobile phone is connected to an external connection connector of the mobile phone.   The external ground electrode is incorporated in a hand strap, the hand strap is connected to a hand strap connection portion of the mobile phone, and the hand strap connection portion is electrically connected to a transceiver in the mobile phone. The mobile phone according to any one of 1 to 5.

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