JP5149746B2 - Thin identification device - Google Patents

Description

  The present invention relates to a thin identification device that performs contactless communication with a counterpart device.

  In recent years, using a thin identification device that can be carried by a user, whether or not an automatic ticket gate or a gate can pass by transmitting identification information from the thin identification device to a reader device (partner device) by non-contact communication (wireless communication) An individual identification system for judging the above is widespread. In this individual identification system, since it is common to adopt a passive RF tag (passive tag) method in which a thin identification device has a function of transmitting using the power of a carrier wave transmitted from a reader device, A communicable distance is relatively short, and an action of holding a thin identification device over a reader device is required.

  In contrast, the thin identification device itself has a battery as a power source, and adopts an active RF tag (active tag) system in which the thin identification device has a function of transmitting data upon receiving power supply from the battery. It has also been proposed to improve convenience. That is, in the thin identification device having its own power supply, the communication distance with the reader device can be increased (for example, 10 m) as compared with the passive RF tag method. This eliminates the need to hold the thin identification device over the reader device, and communication between the reader device and the thin identification device is possible only by the user holding (carrying) the thin identification device approaching the reader device.

  However, when the thin identification device is provided with a primary battery, there is a disadvantage that maintenance such as battery replacement is required periodically. About this point, it is thought that it can improve by using the solar cell which converts light energy into electric energy as a power supply.

It is also considered that a thin identification device is provided with a solar cell as a power source, and a display unit provided on the thin identification device is driven by power generated by the solar cell to display various information on the display unit ( For example, see Patent Documents 1 and 2).
JP 2002-32728 A JP-A-10-240873

  However, when a solar cell is added as a power source to a thin identification device, the thickness of the thin identification device and the thickness direction of the thin identification device are orthogonal to the thickness of the thin identification device compared to a conventional thin identification device without a power source. There is a problem that the occupied area in the surface to be increased becomes large. When the thin identification device is enlarged, there is a problem that it becomes difficult to carry the thin identification device and the convenience of the thin identification device is lowered. Therefore, there is a demand for suppressing the increase in the size of the thin identification device as much as possible.

  This invention is made | formed in view of the said reason, Comprising: While providing a solar cell, it aims at providing the thin identification device which can suppress the increase in the size by a solar cell small.

According to the first aspect of the present invention, the information holding unit that carries the identification information, the communication function unit that transmits the identification information to the counterpart device by performing contactless communication with the counterpart device, and light is received. Including a solar cell that generates electric power at least, and a power supply unit that supplies driving power to the communication function unit, and the solar cell and the communication function unit include a plate-like base material as a constituent member, both base materials Is shared, and the solar cell is disposed on one side of the thickness direction of the base material shared by the solar cell and the communication function unit, and the communication function unit is disposed on the other side. It is characterized by being.

According to this configuration, since a part of the components of the part with the communication function section of the components of the solar cell is shared, with each other to form a each of the solar cells communicate functional unit separately compared to the case of combining, it is possible to reduce the size of the thin-type identification device. As a result, it is possible to suppress the increase in the size of the thin identification device by the solar cell as much as possible while providing the solar cell.

Further , according to this configuration, since the solar cell and the communication function unit are arranged separately on both sides in the thickness direction of the base material shared by the solar cell and the communication function unit, the thickness of the base material Compared with the case where both the solar cell and the communication function unit are arranged on the same surface side in the direction, the occupied area in the plane orthogonal to the thickness direction of the thin identification device can be suppressed.

According to a second aspect of the present invention, in the first aspect of the invention, the solar cell has a light transmitting property and a cell main body that converts light energy into electric energy, and the light that is disposed so as to overlap the cell main body and is transmitted through the cell main body. And a reflective layer that reflects the cell body side, and the reflective layer is shared with a part of the constituent members other than the solar battery.

  According to this configuration, since the solar cell has the reflective layer, the light transmitted through the cell main body of the solar cell is reflected by the reflective layer and returned to the cell main body, thereby increasing the power generation efficiency in the cell main body. it can.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the power supply unit includes a power storage unit that stores power generated by the solar cell, and includes a part of the constituent members of the solar cell and the power storage unit. A part of the constituent members is shared.

  According to this configuration, since the power supply unit includes the power storage unit, it is possible to drive the communication function unit using the power stored in the power storage unit even in a situation where the solar cell is not irradiated with light.

The invention of claim 4 is characterized in that, in the invention of claim 3 , the solar cell and the power storage unit include a plate-like base material as the constituent member, and both base materials are shared.

  According to this configuration, since the solar cell and the power storage unit share the base material, the solar cell and the power storage unit can be handled as a single member, and the number of parts can be reduced.

According to a fifth aspect of the present invention, an information holding unit that carries identification information, a communication function unit that transmits the identification information to the counterpart device by performing contactless communication with the counterpart device, and light is received. Including a solar cell that generates electric power at least, and a power source unit that supplies driving power to at least the communication function unit. The power source unit includes an electric storage unit that stores electric power generated by the solar cell, and the solar cell and the electric storage unit are plates. The substrate is shared, and both the substrates are shared , the solar cell is disposed on one side of the substrate in the thickness direction shared by the solar cell and the power storage unit, and the other surface The power storage unit is disposed on the side .

According to this configuration, since the solar cell and the power storage unit share the base material, compared with the case where the solar cell and the power storage unit are individually formed and combined with each other, the solar cell base material is separated. Only the size of the thin identification device can be kept small. As a result, it is possible to suppress the increase in the size of the thin identification device by the solar cell as much as possible while providing the solar cell. In addition, since the power supply unit includes the power storage unit, the communication function unit can be driven using the power stored in the power storage unit even in a situation where the solar cell is not irradiated with light. Moreover, the solar cell and the power storage unit can be combined and handled as one member, and the number of parts can be reduced. Furthermore, according to this configuration, since the solar cell and the power storage unit are separately provided on both sides in the thickness direction of the base material shared by the solar cell and the power storage unit, Compared with the case where both the solar cell and the power storage unit are arranged on the same surface side, the occupied area in the plane orthogonal to the thickness direction of the thin identification device can be reduced.

  The present invention has an advantage that an increase in size due to the solar cell can be suppressed to a small size even though the solar cell is provided.

  The thin identification device described in each of the following embodiments communicates with a dedicated reader device (partner device) and receives predetermined information from the reader device when receiving radio waves transmitted from the reader device. Reply as data. This thin identification device is used in an individual identification system that performs personal authentication by non-contact communication with a reader device in an entrance door, an automatic door, an automatic ticket gate, or the like of a building, for example. That is, the thin identification device is equipped with an information holding unit storing identification information (ID) for identifying each individual (owner of the thin identification device), and is a reader installed at the entrance of a room or the like. At the time of communication with the device, the identification information is transmitted to the reader device. Therefore, if the above-described individual identification system is used, room entry / exit management and the like can be performed simply by having the user possess a thin identification device.

(Embodiment 1)
As shown in FIG. 2, the thin identification device 1 according to the present embodiment includes a communication function unit 3 that performs non-contact communication (wireless communication) between the information holding unit (memory) 2 and a reader device, and a communication function unit. And a power supply unit 4 for supplying power to the power source 3. The thin identification device 1 has a function of transmitting at least identification information stored in the information holding unit 2 to the counterpart device (reader device) via the communication function unit 3.

  The power supply unit 4 supplies power necessary for communication with the reader device, and includes a solar cell 5 that is a photoelectric conversion element that converts light energy irradiated from the outside into electric energy. Therefore, by ensuring an environment in which a sufficient amount of light is applied to the solar cell 5, stable power supply can be realized over a long period of time without performing maintenance such as battery replacement or charging. .

  Further, in the power supply unit 4, by using a power storage unit such as a secondary battery or a capacitor or a primary battery together with the solar cell 5, the communication function unit can be used even in an environment where the solar cell 5 is not irradiated with light. 3 can be continuously supplied with stable power. In particular, when a power storage unit is used, the power storage unit is charged with the output of the solar cell 5 during the day when the power generation efficiency of the solar cell 5 is high, and the power stored in the power storage unit is used at night when the power generation efficiency of the solar cell 5 decreases. By doing so, there is an advantage that the output of the solar cell 5 can be used effectively. In the present embodiment, by using the solar cell 5 that integrally has the photoelectric conversion function and the power storage function, it is not necessary to use a power storage unit that is separate from the solar cell 5.

  In FIG. 3, an example of the combination of each component of the thin identification device 1 is shown. The thin identification device 1 of the present embodiment has a communication circuit 3b (see FIG. 4A) and an antenna 3c (see FIG. 4A) on one surface of a rectangular plate-like base material 3a (see FIG. 4A). And a photoelectric conversion layer 5b (see FIG. 4 (a)) formed on one surface of a rectangular plate-like substrate 5a (see FIG. 4 (a)). Each component of the solar cell 5 (power supply unit 4) and the information holding unit 2 is configured by overlapping the information holding unit 2, the communication function unit 3, and the solar cell 5 in this order in the thickness direction of the base material. Here, the antenna 3c is formed in a loop shape along the periphery of the substrate 3a, and the photoelectric conversion layer 5b converts light energy received by the light receiving surface opposite to the substrate 5a into electric energy.

  However, when each component (the information holding unit 2, the communication function unit 3, and the solar cell 5) is simply overlapped, the total thickness of the thin identification device 1 is at least the sum of the thickness of each component, and the solar cell 5 The thickness dimension of the thin identification device 1 is increased by the thickness of the solar cell 5 as compared with the case where no is provided. Therefore, in the present embodiment, the configuration described below is employed in order to keep the thickness dimension of the thin identification device 1 as small as possible.

  That is, when different base materials 3a and 5a are used for the communication function unit 3 and the solar cell 5 as in the reference example shown in FIG. 4 (a), the communication function unit as shown in FIG. 4 (b). If the base material 5a of the solar cell 5 is stacked on the surface of the base material 3a of the base material 3a away from the communication circuit 3b and the antenna 3c, the communication circuit 3b and the antenna 3c are within the thickness dimension of the base material 5a. Although the dimension in the thickness direction of the base material 3a occupied by the solar cell 5 and the communication function unit 3 in a state where the solar cell 5 and the communication function unit 3 are stacked is slightly reduced, both the base materials 3a , 5a does not fall below the dimension obtained by adding the photoelectric conversion layer 5b of the solar cell 5 to the sum of the thickness dimensions.

  On the other hand, in this embodiment, in order to keep the thickness dimension of the thin identification device 1 small, as shown in FIG. 1, the base material of the communication function unit 3 is used as the first common base material Bc1 of the solar cell 5. A configuration in which the base material 5a of the solar cell 5 is omitted is also used as the base material. That is, in the example of FIG. 1, the base material of the solar cell 5 and the base material of the communication function unit 3 are shared, and the base material 3a, Compared with the case where 5a is used, the thickness dimension occupied by the solar cell 5 and the communication function unit 3 in a state where the solar cell 5 and the communication function unit 3 are stacked by the thickness dimension of the base material 5a of the solar cell 5 is reduced. There is an advantage that you can.

  As described above, the thin identification device 1 of the present embodiment includes a part of the constituent members of the solar cell 5 (base material 5a) and a part of the constituent members of the constituent parts other than the solar cell 5 (communication function unit 3). By sharing the (base material 3a), there is an effect that the overall thickness can be reduced. In the example of FIG. 1, the photoelectric conversion layer 5 b of the solar cell 5 and the communication circuit 3 b of the communication function unit 3 are provided on one surface in the thickness direction of the common base material Bc1 shared by the solar cell 5 and the communication function unit 3. Since all the antennas 3c are formed, it is possible to overlap another member on the other surface side of the common base material Bc1. That is, it becomes possible to fix the common base material Bc1 to the other member in such a manner that the other surface of the common base material Bc1 is overlapped with another member (not shown).

  By the way, not only the structure in which both the solar cell 5 and the communication function unit 3 are formed on one side of the common base material Bc1 as shown in FIG. 1, but one side of the common base material Bc1 in the thickness direction as shown in FIG. The solar cell 5 (photoelectric conversion layer 5b) may be formed on the other side, and the communication function unit 3 (communication circuit 3b and antenna 3c) may be formed on the other side.

  In the configuration of FIG. 5, since the solar cell 5 and the communication function unit 3 are formed using both surfaces in the thickness direction of the common base material Bc1, the solar cell 5 and the communication are provided on one side of the common base material Bc1. Compared with the case where both of the functional parts 3 are formed, the size of one surface in the thickness direction of the common base material Bc1 can be suppressed to be small. That is, on the other side of the common base material Bc1 where the communication function unit 3 is formed, it is not necessary to secure a space for forming the solar cell 5, and the area can be reduced. The device 1 can be downsized. Moreover, compared with the case where separate base materials 3a and 5a are used for the solar cell 5 and the communication function unit 3 as in the reference example shown in FIG. 6, the solar cell 5 and the communication function unit 3 are stacked. The thickness dimension occupied by the solar cell 5 and the communication function unit 3 can be kept small.

  Further, the thin identification device 1 shares a part of the constituent members of the solar cell 5 and a part of the constituent members of the information holding unit 2 or a part of the constituent members of the solar cell 5 and the information holding unit. 2 and a part of both constituent members of the communication function unit 3 may be shared, so that the overall thickness can be reduced.

(Embodiment 2)
In the thin identification device 1 of the present embodiment, the power supply unit 4 includes a power storage unit 6 (see FIG. 7) that stores electricity output from the solar cell 5, and the base of the solar cell 5 and the base of the power storage unit 6 are included. It differs from the thin identification device 1 of the first embodiment in that the material is shared.

  Hereinafter, each structure of the solar cell 5 and the electrical storage part 6 is demonstrated with reference to FIG.

  In the present embodiment, a dye-sensitized solar cell using a dye having a sensitizing action is employed as the solar cell 5. As shown in FIG. 7A, the dye-sensitized solar cell 5 is made of a glass substrate, and a working electrode substrate 5d in which a working electrode 5c made of a transparent conductor layer (transparent electrode) is formed on one surface. And a counter electrode substrate 5f provided with a counter electrode 5e formed of a glass substrate and having a transparent conductor layer (transparent electrode) on one surface thereof are arranged in such a manner that the electrodes 5c and 5e face each other. Here, on the working electrode 5c on the working electrode base 5d side, a semiconductor layer 5g made of a semiconductor carrying a dye (not shown) that receives light and emits electrons is provided. The space between the working electrode 5c and the counter electrode 5e is filled with an electrolyte layer (electrolyte) 5h, and a sealing material 5i for sealing the electrolyte together with the electrodes 5c and 5e is provided around the semiconductor layer 5g. It is provided so as to surround the entire circumference of the layer 5g.

According to this configuration, the light in the visible light region irradiated on the solar cell 5 passes through the working electrode base 5d and the working electrode 5c and is absorbed by the dye in the semiconductor layer 5g. The dye that has absorbed the light emits electrons, and the electrons move to the semiconductor layer 5g and pass between the semiconductor particles to reach the working electrode 5c. Further, the electrons move to the counter electrode 5e on the counter electrode substrate 5f side through a load (here, the communication function unit 3) connected between the working electrode 5c and the counter electrode 5e by a conducting wire or the like. The dye returns to the ground state dye by receiving electrons from a reduced state electrolyte (hereinafter referred to as a reductant) I ⁻ contained in the electrolyte layer 5h, and the oxidized electrolyte (hereinafter referred to as an oxidant) I ₃ ⁻ is Electrons are received from the counter electrode 5e on the counter electrode substrate 5f side and returned to the reductant I ⁻ . That is, the electrolyte layer 5h functions as a charge transport unit that carries charges between the working electrode 5c (semiconductor layer 5g) and the counter electrode 5e. As a result, when the solar cell 5 is irradiated with light, a current flows from the solar cell 5 to the load (here, the communication function unit 3).

  The dye-sensitized solar cell 5 has a characteristic that it can generate enough electric power even indoors (indoors) where the illuminance is lower than that of sunlight compared to a crystalline silicon solar cell. By forming the 5d and the counter electrode base material 5f from a transparent material, a configuration having transparency as a whole can be obtained.

  On the other hand, as shown in FIG. 7A, the power storage unit 6 includes a positive electrode substrate 6b having an electrode layer (positive electrode layer) 6a formed on one surface and a negative electrode having an electrode layer (negative electrode layer) 6c formed on one surface. The substrate 6d is arranged such that the electrode layers 6a and 6c face each other. Here, the electrolyte solution 6e is filled between the positive electrode substrate 6b and the negative electrode substrate 6d, and the electrolyte solution 6e is placed around the electrode layers 6a and 6c together with the positive electrode substrate 6b and the negative electrode substrate 6d. A sealing material 6f for sealing is provided so as to surround the electrode layers 6a and 6c.

  Here, as in the reference example shown in FIG. 7B, when the solar cell 5 and the power storage unit 6 are simply overlapped, the dimension in the thickness direction occupied by the solar cell 5 and the power storage unit 6 is the solar cell 5. There is a problem that it becomes larger because the sum of the thickness dimension of the battery and the thickness dimension of the power storage unit 6 is obtained.

  Therefore, in the present embodiment, as shown in FIG. 8, the positive electrode base material of the power storage unit 6 is used as the counter electrode base material of the solar cell 5 as the second common base material Bc2, and the counter electrode base material 5f of the solar cell 5 is omitted. By doing so, the overall thickness of the thin identification device 1 is reduced. That is, a part of the constituent members of the solar cell 5 (counter electrode base material 5f) and a part of the constituent members other than the solar battery 5 (power storage unit 6) (the positive electrode base material 6b) are shared. Compared to the example, the thickness direction occupied by the solar cell 5 and the power storage unit 6 in a state where the solar cell 5 and the power storage unit 6 are stacked can be reduced, and the thin identification device 1 can be thinned. it can.

  In addition, the configuration of the present embodiment may be adopted in combination with the configuration in which the base material of the communication function unit 3 is also used as the base material of the solar cell 5 as described in the first embodiment. Further thinning of the thin identification device 1 can be achieved as compared with the case where it is used alone. That is, as shown in FIG. 9, the solar cell 5 is disposed on one surface side of the common substrate Bc2 in the thickness direction, and the power storage unit 6 and the communication function unit 3 are disposed on the other surface side. Bc2 can be shared by the solar cell 5, the power storage unit 6, and the communication function unit 3, and the thin identification device 1 can be further reduced in thickness.

  In the example of FIG. 8, the common base material Bc2 used as the counter electrode base material and the positive electrode base material does not have transparency, but the common base material Bc2 may have transparency.

  Other configurations and functions are the same as those of the first embodiment.

(Embodiment 3)
In the thin identification device 1 of the present embodiment, the solar cell 5 is disposed so as to overlap the cell body 5A (see FIG. 10) having translucency and converting light energy into electric energy, and the cell body 5A. The embodiment includes a reflection layer 5B (see FIG. 10) that reflects the light transmitted through 5A to the cell body 5A side, and the reflection layer 5B is shared with some of the constituent members of the communication function unit 3. 1 and the thin identification device 1. Here, the cell body 5 </ b> A is formed in a rectangular plate shape having the same size as the base material 3 a of the communication function unit 3.

  That is, as described in the second embodiment, when a dye-sensitized solar cell is used as the solar cell 5, the cell main body 5A can be provided with a translucency for visible light. In this case, the cell main body 5A The light irradiated from the front side may pass through the cell body 5A and escape to the back of the cell body 5A. Therefore, as in the reference example shown in FIG. 10, a reflective layer 5B is provided behind the cell body 5A, and light that has once passed through the cell body 5A is returned to the cell body 5A, so that the light to the cell body 5A is transmitted. It is conceivable to increase the irradiation efficiency and consequently improve the power generation efficiency. Here, the reflection layer 5B may be one that diffuses and reflects light like a white plate, or one that reflects light regularly like a mirror surface.

  In this embodiment, as shown in FIG. 11, the reflection layer 5 </ b> B described above and the base material 3 a of the communication function unit 3 are shared. That is, a function of reflecting visible light is provided by plating or the like on one surface side (cell main body 5A side) in the thickness direction of the base material 3a of the communication function unit 3, and the antenna 3c of the communication function unit 3 is connected to the base 3a. It is formed on the one surface of the material 3a. Here, since the antenna 3c is formed in a loop shape along the periphery of the base material 3a, the portions of the base material 3a excluding the antenna 3c (inside and outside of the antenna 3c) function as the reflective layer 5A. Become.

  As described above, the reflective layer 5B is omitted by sharing a part of the constituent members of the solar cell 5 (reflective layer 5B) and a part of the constituent members of the communication function unit 3 (base material 3a). It is possible to reduce the thickness dimension occupied by the solar cell 5 and the communication function unit 3 in a state where the solar cell 5 and the communication function unit 3 are stacked.

  By the way, as another configuration example of the present embodiment, as shown in FIG. 12, it may be considered that the antenna 3c itself of the communication function unit 3 is also used as the reflective layer 5B. In other words, the antenna 3c is formed on substantially the entire surface of the base 3a on the one surface side (cell main body 5A side), and the surface of the antenna 3c is provided with light reflectivity so that it can communicate with the reflective layer 5B of the solar cell 5. The antenna 3c of the part 3 is shared, and the thin identification device 1 can be made thinner as in the example of FIG. 11 compared to the case where the reflective layer 5B is separately provided.

  In addition, the configuration of the present embodiment may be employed in combination with the configuration in which the base material 3a of the communication function unit 3 is shared by the base material 5a of the solar cell 5 as described in the first embodiment. As compared with the case where the configuration is employed alone, the thin identification device 1 can be further reduced in thickness.

  Other configurations and functions are the same as those of the first embodiment.

  By the way, although the thin identification device 1 of each embodiment mentioned above is aiming at the thinning of the whole by sharing at least a part of structural member of the solar cell 5 and a part of structural members other than the solar cell 5. From the viewpoint of portability, a desirable thickness dimension is 10 mm or less. In consideration of storing the thin identification device 1 in a wallet or a card case when carrying it, it is desirable to suppress the thickness dimension to 5 mm or less. Furthermore, when the convenience equivalent to that of a conventional credit card is required, the thickness dimension is preferably 2 mm or less.

  A specific example of the individual identification system using the thin identification device 1 of each of the above embodiments will be described below with reference to FIG. Here, a case where the individual identification system is used for room entry / exit management will be described as an example.

  That is, the reader device 100 installed at the entrance of the room has an LF band transmitter 101 and an LF antenna 102 for communicating with the thin identification device 1 using the first communication method of the LF band (long wave band: 30 to 300 kHz). An RF transceiver 103 and an RF antenna 104, and an LF band transmitter 101 and an RF transceiver 103 for communicating with the thin identification device 1 in the second communication method of the UHF band (ultra-high frequency band: 300 MHz to 3 GHz). And a display unit 106 and a buzzer 107 each including a liquid crystal display connected to the control unit 105.

  The thin identification device 1 possessed by the user includes an LF band receiving unit 31 and an LF antenna 32 for communicating with the reader device 100 by the first communication method, and the reader device 100 by the second communication method. The communication function unit 3 includes an RF transmission / reception unit 33 and an RF antenna 34 for communication, and a control unit 35 that controls the LF band reception unit 31 and the RF transmission / reception unit 33. Here, taking the communication function unit 3 shown in FIG. 11 as an example, the LF antenna 32 includes, for example, a loop antenna 3c formed on one surface side of the base material 3a of the communication function unit 3, and the RF antenna 33 includes the base material 3a. It consists of a patch antenna (not shown) formed on the other surface side.

  Next, an operation example of the above-described individual identification system will be shown.

  The reader apparatus 100 superimposes and amplifies the activation signal generated by the control unit 105 on the signal component of the induced magnetic field in the LF band transmission unit 101, and transmits the signal from the LF antenna 102 using the first communication method (LF) at a constant cycle. Transmit intermittently. Accordingly, an authentication area is formed around the reader device 100 (near the entrance / exit of the room) within a range where the activation signal reaches.

  When the user who has the thin identification device 1 enters the authentication area, the thin identification device 1 receives the activation signal from the reader device 100 by the LF antenna 32, and then the LF band reception unit 31 activates the control unit 35. Then, the control unit 35 generates a response signal including the identification information in the information holding unit 2, and the response signal is transmitted from the RF transmission / reception unit 33 via the RF antenna 34 by the second communication method (UHF). Reply to Here, the thin identification device 1 supplies power from the power supply unit 4 only to the LF band receiving unit 31 in the communication function unit 3 until receiving the activation signal, and other units (RF transmitting / receiving units) other than the LF band receiving unit 31 33, operating in a low power consumption mode in which power is not supplied to the control unit 35), and operating in a normal mode in which power is supplied to each unit other than the LF band receiving unit 31 for the first time by receiving an activation signal. To do.

  The reader device 100 receives the response signal by the RF transmission / reception unit 103 via the RF antenna 104 and transfers the response signal from the control unit 105 to a host device (not shown). In the host device, the identification information is collated, and when it is determined that the identification information is normal and the authentication is normally completed, the control unit 105 of the reader device 100 confirms the confirmation signal ( ACK signal) is transmitted from the RF transceiver 103 to the thin identification device 1 via the RF antenna 104. Further, the control unit 105 of the reader device 100 notifies the display unit 106 and the buzzer 107 when the authentication of identification information is normally completed, and performs control for unlocking the entrance door of the room. When the authentication of the identification information fails, a warning is given by the display unit 106 and the buzzer 107, and control for maintaining the locking of the entrance door of the room is performed.

  The thin identification device 1 ends the transmission of the response signal when the RF transmission / reception unit 33 receives the confirmation signal. Instead of transmitting a confirmation signal from the reader device 100, the identification information that has been authenticated may be included in the next activation signal. In this case, the thin identification device 1 includes the activation signal including its own identification information in the LF band. The reception of the response signal is terminated by receiving at the reception unit 31.

  As described above, the authentication area can be accurately defined within a range of 1.5 to 2 m, for example, by the thin identification device 1 being activated by the activation signal of the LF band and returning the response signal of the UHF band. The RF transmitter / receiver 33 that performs UHF band wireless communication consumes as much as 10 to 20 mA, whereas the LF band receiver 31 that performs LF band wireless communication has a weakness of about several μA. Since power is activated, the standby power of the thin identification device 1 can be kept low by adopting a low power consumption mode in which power is not supplied to the RF transmitter / receiver 33 in the standby state.

  By the way, the thin identification device 1 having the above-described configuration can also be used for an individual identification system that performs personal authentication when starting an automobile engine, starting a computer, or starting various equipment. Further, for example, the reader device 100 is installed at an entrance to a management area where a large number of unspecified visitors are present, and the thin identification device 1 is handed over in advance to regular (with appointments) visitors. Regardless of the presence or absence, it is possible to identify a regular visitor and permit entry into the management area. In addition, in situations where group behavior is required in childcare facilities, nursing homes, schools, companies, group trips, etc., each person can carry the thin identification device 1 to confirm the presence of each individual instead of a call. It is also possible to use it.

It is a schematic sectional drawing which shows the principal part of Embodiment 1 of this invention. It is a schematic block diagram which shows a thin identification device same as the above. The thin identification device same as the above is shown, (a) is a schematic perspective view, (b) is a schematic sectional view. The reference example same as the above is shown, (a) is a schematic sectional view before the combination, and (b) is a schematic sectional view after the combination. It is a schematic sectional drawing which shows the other structural example same as the above. The reference example same as the above is shown, (a) is a schematic sectional view before the combination, and (b) is a schematic sectional view after the combination. The reference example of Embodiment 2 of this invention is shown, (a) is a schematic sectional drawing before a combination, (b) is a schematic sectional drawing after a combination. It is a schematic sectional drawing which shows the principal part same as the above. It is a schematic sectional drawing which shows the other structural example same as the above. It is a general | schematic disassembled perspective view which shows the reference example of Embodiment 3 of this invention. It is a schematic exploded perspective view which shows the principal part same as the above. It is a general | schematic disassembled perspective view which shows the other structural example same as the above. It is a schematic block diagram which shows the individual identification system using the thin identification device same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thin identification device 2 Information holding part 3 Communication function part 3a Base material 3b Communication circuit 3c Antenna 4 Power supply part 5 Solar cell 5a Base material 5b Photoelectric conversion layer 5f Counter electrode base material 6 Power storage part 6b Positive electrode base material 100 Reader apparatus (mating side) apparatus)
Bc1 (first) common substrate Bc2 (second) common substrate

Claims (5)

An information holding unit carrying identification information;
A communication function unit that transmits the identification information to the counterpart device by performing contactless communication with the counterpart device;
Including a solar cell that generates power by receiving light, and a power supply unit that supplies driving power to at least the communication function unit,
The solar cell and the communication function unit comprise a plate-like base material as a constituent member, and both base materials are shared,
The solar cell is disposed on one surface side in the thickness direction of the base material shared by the solar cell and the communication function unit, and the communication function unit is disposed on the other surface side. Thin identification device. The solar cell has a cell main body that has translucency and converts light energy into electric energy, and a reflective layer that is disposed so as to overlap the cell main body and reflects light transmitted through the cell main body to the cell main body side, 2. The thin identification device according to claim 1, wherein the reflective layer is shared with a part of the constituent members other than the solar cell . Claim wherein the power supply unit, characterized in that has a power storage unit for storing power that the solar cell is generated, a part of the components of the part and the storage part of the components of the solar cell is shared The thin identification device according to claim 1 or 2 . 4. The thin identification device according to claim 3, wherein the solar cell and the power storage unit include a plate-like base material as the constituent member, and both base materials are shared . An information holding unit carrying identification information;
A communication function unit that transmits the identification information to the counterpart device by performing contactless communication with the counterpart device;
Including a solar cell that generates power by receiving light, and a power supply unit that supplies driving power to at least the communication function unit,
The power supply unit has a power storage unit that stores the power generated by the solar cell, the solar cell and the power storage unit have a plate-like base material, and both base materials are shared,
The solar cell is disposed on one side in the thickness direction of the substrate to be shared between the solar cell and the power storage unit, the thin the power storage unit on the other side is it characterized by being arranged type identification device.

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