JP2009301375A - Rfid tag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an RFID (Radio Frequency IDentification) tag allowing easy search for a desired RFID tag from a plurality of RFID tags. <P>SOLUTION: A reader/writer transmits a signal designated with a peculiar ID stored in the RFID tag stuck on a book to the RFID tag so as to search for the desired book. When the RFID tag receives a peculiar ID designation signal (S31: YES, S32: YES), the RFID tag returns a peculiar ID reply signal (S33). The reader/writer decides that the desired book is present inside an emission sphere of an electric wave when receiving the peculiar ID reply signal, and transmits an identification code signal so as to make an organic EL (Electroluminescence) element of the RFID tag display a desired pattern. When the RFID tag having received the peculiar ID designation signal next receives the identification code signal (S35: YES), the RFID tag selects the pattern corresponding to an identification code and makes the organic EL element display it (S37). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an RFID tag. More specifically, the present invention relates to an RFID tag provided with an organic EL light emitting element.

In recent years, distribution management of articles has been performed by attaching RFID (Radio Frequency IDentification) tags to articles and reading them with a reader / writer. In addition, by adding an LED or buzzer to an RFID tag and causing the reader / writer to react with the LED or buzzer of a specific RFID tag to execute notification, a desired RFID tag can be found from a plurality of RFID tags. A possible RFID tag, an article search system using the RFID tag, and an article storage system have been proposed.
JP 2006-24018 A

  However, in the above-described system, since the notification mode from the LEDs and buzzers of the RFID tag is common, a plurality of reader / writers simultaneously react with the LEDs and buzzers added to the desired RFID tags, respectively, to execute the notification. In this case, it is not possible to distinguish between RFID tags that have made notifications. Therefore, there is a problem that the user cannot specify a desired RFID tag.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an RFID tag capable of easily searching for a desired RFID tag from a plurality of RFID tags.

In order to solve the above-described problem, an RFID tag according to the first aspect of the present invention is an organic EL (Electroluminescence) light emission that is driven by an electric signal generated when a radio wave is irradiated to the antenna and the antenna. An element; a storage means for storing an ID; a receiving means for demodulating and receiving an electric signal generated at the antenna; an ID included in the information demodulated and received by the receiving means; and the storage means And display control means for controlling the organic EL light emitting element to display an image when the stored ID satisfies a predetermined relationship.

  In addition to the configuration of the invention described in claim 1, the organic EL light emitting device includes the antenna, the storage unit, and the receiver in the manufacturing process of the RFID tag. It is formed on a base material simultaneously with the means and the display control means.

  In the RFID tag according to the first aspect of the present invention, since the RFID tag includes an organic EL light emitting element as a light emitting element, a plurality of different notifications can be executed by the RFID tag. This makes it possible to search for a desired RFID tag from among a plurality of RFID tags.

  Further, in the RFID tag of the invention according to claim 2, in addition to the effect of the invention of claim 1, the manufacturing process of the organic EL light emitting element and the manufacturing process of the antenna, the storage means, the receiving means, and the display control means It becomes possible to form an organic EL light emitting element on a substrate easily and inexpensively.

  Hereinafter, an embodiment of an RFID tag 1 embodying the present invention will be described with reference to the drawings. These drawings are used for explaining the technical features that can be adopted by the present invention, and the configuration of the apparatus described, the flowcharts of various processes, etc., unless otherwise specified. It is not intended to be limited to that, but merely an illustrative example.

  First, an overview of a book search system 50, which is an example of a system using the RFID tag 1 and the reader / writer 21 (21A, 21B), will be described with reference to FIG. FIG. 1 is a schematic diagram showing a book search system 50.

  As shown in FIG. 1, a plurality of books 100 with the RFID tag 1 attached to the spine are displayed on the bookshelf. The RFID tag 1 is provided with an organic EL (Electroluminescence) element 7 so that a desired image can be displayed. The user searches for the book by using the reader / writer 21 to display an image from the organic EL element 7 attached to the desired book.

  A specific method for searching for books will be described. First, the user (Exhibit A) reads information (title (“XXX”), book number, etc., hereinafter referred to as “book related information”) 100A of the book (hereinafter referred to as “search book”) 100A to be searched for in the reader / writer 21A. Input from the input unit 27A of (ID: A). Then, the radiation plane on the reader / writer 21A that emits radio waves (the depth side on the paper surface of the reader / writer 21A in FIG. 1) is set to the book shelf side, and the search is started.

  When the search is started, a signal radio wave designating the RFID tag 1A attached to the search book 100A is radiated from the antenna (R / W antenna 25 (see FIG. 4)) of the reader / writer 21A. In this state, the user (the former) irradiates signal radio waves in order on the displayed books 100 while gradually changing the direction of the reader / writer 21A. And among the books 100 displayed on the bookshelf, signal radio waves are irradiated to the RFID tag 1A attached to the spine of the search book 100A.

  The RFID tag 1A irradiated with the signal radio wave determines whether it is designated by the reader / writer 21A based on a signal obtained by demodulating the signal radio wave. Then, the RFID tag 1A that is determined to be designated causes the organic EL element 7A to display a display that can identify the ID of the reader / writer 21A (for example, “A” that is the ID of the reader / writer 21A). Thereby, the user (A) recognizes the search book 100A (title: “XXX”) to which the RFID tag 1A displaying “A” is affixed among the plurality of books 100 as a desired book. It becomes possible.

  Another user (B) searches for a different book 100B (title: “ΔΔΔΔ”) using another reader / writer 21B (ID: B) simultaneously with the user (A). Suppose. In such a case, the RFID tag 1B irradiated with the signal radio wave from the reader / writer 21B displays a display (for example, “B” that is the ID of the reader / writer 21B) so that the ID of the reader / writer 21B can be specified. 7 is displayed. As a result, even when another user (B) is searching for the search book 100A using the reader / writer 21A, the RFID tag 1B displaying “B” is pasted. The book 100B (title: “ΔΔΔΔ”) can be recognized as a desired book.

  As described above, the RFID tag 1 is displayed by the organic EL element 7 by changing the display content so that the reader / writer 21 that has transmitted the signal radio wave can be identified. Therefore, even when a plurality of users search for a book at the same time, the user visually recognizes the organic EL element 7 to check from which reader / writer 21 the RFID tag 1 is being searched. It becomes possible to do. Thereby, the user can search for a desired book.

  Next, the electrical configuration of the RFID tag 1 and the reader / writer 21 will be described with reference to FIGS. 2 is a schematic diagram illustrating an electrical configuration of the RFID tag 1, FIG. 3 is a schematic diagram illustrating a power configuration of the RFID tag 1, and FIG. 4 is a schematic diagram illustrating an electrical configuration of the reader / writer 21. It is.

  First, the electrical configuration of the RFID tag 1 will be described with reference to FIG. As shown in FIG. 2, the RFID tag 1 includes a tag control unit 2 that controls the entire RFID tag 1 such as communication processing, determination processing, and display processing, a tag antenna 5 that is an antenna having a loop shape, and a tag A tag modulation unit 3 that generates a modulation signal that can be transmitted from the antenna 5, a tag demodulation unit 4 that demodulates an electric signal received from the tag antenna 5, an organic EL element 7, and a tag storage unit 8 that is a nonvolatile storage element And a tag power supply unit 6.

  The tag antenna 5 is a so-called loop antenna. When a radio wave is irradiated, a current can be generated in the tag antenna 5 by electromagnetic induction, and an electric signal is transmitted to the tag antenna 5 so that a desired signal radio wave is radiated from the tag antenna 5. It is comprised so that it can be made. The tag antenna 5 has its loop diameter adjusted so that a resonance phenomenon occurs at a predetermined frequency. Thereby, when the signal radio wave radiated from the reader / writer 21 is applied to the tag antenna 5, it is possible to efficiently extract an electric signal. In addition, when an electric signal is transmitted from the tag modulation unit 3, it is possible to efficiently radiate signal radio waves.

  The frequency of the radio wave that can be transmitted and received by the tag antenna 5 is not limited to a specific frequency as long as communication with the reader / writer 21 is possible, and it is needless to say that various frequencies can be used. is there. For example, radio waves having a frequency of 13.56 MHz band and a frequency of 2.4 GHz band are used.

  The tag demodulator 4 is provided to demodulate an electric signal generated by irradiating the tag antenna 5 with a signal radio wave, and is electrically connected to the tag antenna 5. Further, the tag demodulation unit 4 is electrically connected to the tag control unit 2 so that the demodulated electric signal can be transmitted to the tag control unit 2. The tag modulation unit 3 is provided to modulate the electrical signal transmitted from the tag control unit 2 into a modulation signal that can be transmitted via the tag antenna 5, and the tag control unit 2 and the tag antenna. 5 is electrically connected.

  Note that the modulation scheme in the tag modulation section 3 and the demodulation scheme in the tag demodulation section 4 are not limited to specific schemes, and various conventionally known modulation / demodulation schemes are employed. For example, an amplitude modulation (AM) method, a frequency modulation (FM) method, a phase modulation (PM) method, and the like can be given.

  The tag storage unit 8 is provided with a unique ID storage area 9 in which a unique ID is stored. The unique ID is an ID unique to the RFID tag 1 and is an ID used for identifying and specifying the RFID tag. The tag storage unit 8 is provided with a display symbol information storage area 10 in which display symbols are stored. An identification code is stored in association with the display symbol, and is used for specifying the display symbol from the information of the identification code. The tag storage unit 8 is electrically connected to the tag control unit 2 so that information stored in the tag storage unit 8 can be referred to by the tag control unit 2.

  The organic EL element 7 is electrically connected to the tag control unit 2 so that a symbol can be displayed based on a control signal from the tag control unit 2. The tag power supply unit 6 stores a current generated by irradiating the tag antenna 5 with a signal radio wave. The stored power is used as power for driving the tag control unit 2, tag modulation unit 3, tag demodulation unit 4, organic EL element 7, and tag storage unit 8.

  The power supply configuration of the RFID tag 1 will be described with reference to FIG. As shown in FIG. 3, the tag power supply unit 6 stores the current generated in the tag antenna 5. And in order to drive the tag control part 2, the tag modulation part 3, the tag demodulation part 4, the organic EL element 7, and the tag memory | storage part 8, electric power is supplied to these functional blocks. Thereby, each functional block of the RFID tag 1 is driven to execute various processes. The tag power supply unit 6 is configured by a conventionally known device capable of storing current, and examples thereof include a capacitor.

  Each functional block (tag control unit 2, tag modulation unit 3, tag demodulation unit 4, tag antenna 5, tag power supply unit 6, organic EL element 7, tag storage unit 8) constituting the RFID tag 1 described above is configured as follows. Each basic structure is the same. Therefore, when the RFID tag 1 is manufactured, it can be simultaneously formed on the substrate by the same manufacturing process. Thereby, it is possible to simplify the manufacturing process, suppress the manufacturing cost, and suppress the product cost of the RFID tag 1.

  In addition, it does not specifically limit as a method of forming each functional block on a base material, A conventionally well-known method can be used. Examples of the method for forming the functional block include a printing method (screen printing method), a vacuum deposition method, a dip coating method, and the like. Further, by using a conductive organic polymer as a material and forming each functional block on the substrate by the micro contact printing method, each functional block can be easily formed on the substrate. Further, by using conductive ink as a material and forming each functional block on the substrate by an ink jet method, each functional block can be easily formed on the substrate.

  In the present embodiment, the tag control unit 2, the tag modulation unit 3, the tag demodulation unit 4, the tag power supply unit 6, and the tag storage unit 8 are independent functional blocks constituting the RFID tag 1. However, it is not limited to this configuration. Therefore, the above-described functions may be realized by an RFID chip in which these functional blocks are integrated into one chip.

  Next, the electrical configuration of the reader / writer 21 will be described with reference to FIG. As shown in FIG. 4, the reader / writer 21 includes an R / W control unit 22 that controls the entire reader / writer 21 such as communication processing and determination processing, an R / W antenna 25 having a loop shape, an R / W An R / W modulation unit 23 that generates a modulation signal that can be transmitted from the antenna 25, an R / W demodulation unit 24 that demodulates a signal received from the tag antenna 5, an input unit 27, and an R / W that is a nonvolatile storage element W storage unit 28.

  The R / W antenna 25 is a so-called loop antenna. When a radio wave is irradiated, a current can be generated in the R / W antenna 25 by electromagnetic induction, and an electric signal is transmitted to the R / W antenna 25, so that a desired signal radio wave can be transmitted to the R / W antenna 25. / W antenna 25 is configured to be able to radiate. In the R / W antenna 25, the loop diameter of the R / W antenna 25 is adjusted so that a resonance phenomenon occurs at a predetermined frequency. Thereby, when the signal radio wave radiated from the RFID tag 1 is applied to the R / W antenna 25, it is possible to efficiently extract an electric signal. Further, when an electrical signal is transmitted from the R / W modulation unit 23, it is possible to efficiently radiate signal radio waves.

  The frequency of the radio wave that can be transmitted and received by the R / W antenna 25 is not limited to a specific frequency as long as it can be communicated with the RFID tag 1, and various frequencies can be used. Of course. For example, radio waves having a frequency of 13.56 MHz band and a frequency of 2.4 GHz band are used.

  The R / W demodulator 24 is provided for demodulating an electric signal generated by irradiating the R / W antenna 25 with radio waves, and is electrically connected to the R / W antenna 25. Further, the R / W demodulator 24 is electrically connected to the R / W controller 22 so that the demodulated electrical signal can be transmitted to the R / W controller 22. The R / W modulator 23 is provided to modulate the electrical signal transmitted from the R / W controller 22 into a modulated signal that can be transmitted via the R / W antenna 25. The R / W modulation unit 23 is electrically connected to the R / W control unit 22 and the R / W antenna 25.

  The modulation scheme in the R / W modulation section 23 and the demodulation scheme in the R / W demodulation section 24 are not limited to specific schemes, and various conventionally known modulation / demodulation schemes are employed. For example, an amplitude modulation (AM) method, a frequency modulation (FM) method, a phase modulation (PM) method, and the like can be given.

  The input unit 27 is provided for inputting book related information of a book to be searched by the user, and includes a push button, a touch sensor, and the like.

  In addition, the R / W storage unit 28 is provided with a unique ID assignment information storage area 29 and stores unique ID assignment information. The unique ID assignment information is information in which the unique ID stored in the tag storage unit 8 (see FIG. 2) of the RFID tag 1 is associated with the book related information of the book to which the RFID tag 1 is attached. . Further, the R / W storage unit 28 is provided with an identification code information storage area 30 in which identification code information is stored. The identification code information is information on a symbol displayed on the organic EL element 7 of the RFID tag 1 and an identification code corresponding to the symbol.

  The unique ID allocation information is used to search for the unique ID of the RFID tag 1 attached to the corresponding book when the book-related information of the search book is input by the user via the input unit 27. Further, the identification code information is used to specify a symbol when the symbol is displayed on the organic EL element 7 included in the RFID tag 1. The R / W storage unit 28 is electrically connected to the R / W control unit 22 so that each information stored in the R / W storage unit 28 can be referred to by the R / W control unit 22. is doing.

  Next, processing executed by the tag control unit 2 of the RFID tag 1 and the R / W control unit 22 of the reader / writer 21 will be described with reference to FIGS. 5 and 6. FIG. 5 is a flowchart of the RFID tag search process executed by the R / W control unit 22 of the reader / writer 21, and FIG. 6 is a flowchart of the notification process executed by the tag control unit 2 of the RFID tag 1. is there.

  Note that the R / W control unit 22 of the reader / writer 21 repeatedly executes the process shown in FIG. 5 in a power-on state. Further, the tag control unit 2 of the RFID tag 1 irradiates the tag antenna 5 with the signal radio wave radiated from the reader / writer 21, and the tag power supply unit 6 (see FIG. 3) generates drive power to generate the tag control unit 2. 6 is executed when power is supplied to.

  As shown in FIG. 5, the R / W control unit 22 of the reader / writer 21 monitors the input unit 27 while the power is on, and waits until an input operation is performed by the user via the input unit 27. (S11: NO).

  Then, when the user performs an input operation of book-related information related to the search book through the input unit 27 and the R / W control unit 22 detects this (S11: YES), the R / W control unit 22 With reference to the unique ID assignment information stored in the unique ID assignment information storage area 29 of the R / W storage unit 28, the unique ID of the RFID tag 1 attached to the book corresponding to the input book related information is specified. (S12).

  Next, the radio wave emitting surface on which the R / W antenna 25 in the reader / writer 21 is arranged is directed to the bookshelf side by the user. In this state, a signal radio wave is transmitted to check whether or not there is an RFID tag attached to the search book (hereinafter referred to as “search RFID tag”) in the signal radio wave radiation range. Specifically, the R / W control unit 22 of the reader / writer 21 performs R / W modulation in order to cause the R / W antenna 25 to transmit a unique ID designation signal that is a signal designating the unique ID identified in S12. A unique ID designation signal is transmitted to the unit 23 (S13).

  The unique ID designation signal transmitted from the R / W control unit 22 is modulated by the R / W modulation unit 23 to a frequency that can be radiated from the R / W antenna 25. The modulated unique ID designation signal is radiated from the R / W antenna 25 as a signal radio wave.

  On the other hand, in the RFID tag 1, when the signal radio wave radiated from the reader / writer 21 is irradiated to the tag antenna 5, the tag power supply unit 6 generates power necessary for driving the tag control unit 2 and the like. As a result, the tag control unit 2 is activated, and the processing in FIG. 6 is started.

  As shown in FIG. 6, the tag control unit 2 of the activated RFID tag 1 first waits until it receives a demodulated signal received by the tag antenna 5 and demodulated by the tag demodulation unit 4. If the demodulated signal is received and it is determined that the received signal is a unique ID designation signal transmitted from the reader / writer 21 (S31: YES), then it is stored in the unique ID storage area 9 of the tag storage unit 8. The unique ID is read and compared with the unique ID designated by the received unique ID designation signal.

  When the unique ID designated by the received unique ID designation signal matches the read unique ID (S32: YES), it is transmitted from the reader / writer 21 based on the processing of S13 (see FIG. 5). It is determined that this is a unique ID designation signal. In this case, the tag control unit 2 needs to return a response signal to the reader / writer 21 and notify the reader / writer 21 that the unique ID designation signal has been received. Therefore, the tag control unit 2 transmits a unique ID response signal including information of the read unique ID to the tag modulation unit 3 (S33).

  The unique ID response signal transmitted from the tag control unit 2 is modulated by the tag modulation unit 3 to a frequency that can be radiated from the tag antenna 5. The modulated unique ID response signal is radiated from the tag antenna 5 as a signal radio wave.

  On the other hand, if the demodulated signal is not the unique ID designation signal transmitted from the reader / writer 21 (S31: NO), the tag control unit 2 returns to S31 and continues to wait until receiving the unique ID designation signal. Even when the demodulated signal is a unique ID designation signal (S31: YES), the unique ID designated by the received unique ID designation signal and the unique ID storage area 9 of the tag storage unit 8 are read. If the unique ID does not match (S32: NO), the process returns to S31 and continues until a unique ID designation signal is received.

  As shown in FIG. 5, the R / W control unit 22 of the reader / writer 21 after transmitting the unique ID designation signal (see S13) continues to designate the unique ID until a unique ID response signal is received from the RFID tag 1. The signal transmission process is repeated (S15: NO → S13). The R / W antenna 25 receives the signal radio wave from the RFID tag 1 and is demodulated by the tag demodulating unit 4. The demodulated signal obtained as a result of the demodulation is based on the processing of S 33 (see FIG. 6). In the case of the unique ID response signal transmitted (S15: YES), the R / W control unit 22 then includes the unique ID included in the received unique ID response signal and the unique ID specified in S12. Are compared (S17). If the two match (S17: YES), it is determined that the search book and the search RFID tag exist within the radiation range of the signal radio wave radiated from the reader / writer 21.

  On the other hand, even if the demodulated demodulated signal is a unique ID response signal (S15: YES), if the included unique ID does not match the unique ID specified in S12 (S17: NO), This is a unique ID reply signal returned from an RFID tag attached to a book not to be searched, in which the search book and the search RFID tag do not exist within the radiation range of the signal radio wave emitted from the reader / writer 21. Judge. In such a case, the direction of the reader / writer 21 is adjusted by the user, and the radiation direction of the radio wave is changed. Then, the process returns to S13, and the above-described processing is repeatedly executed until the search book and the search RFID tag exist in the signal radio wave radiation range.

  In the above-described processing, it is determined whether or not the unique ID specified in the received unique ID specifying signal matches the unique ID specified in S12. However, the determination method is limited to this method. Not. Accordingly, the R / W control unit 22 of the reader / writer 21 reads the reader when the relationship between the unique ID specified by the received unique ID specifying signal and the unique ID specified in S12 conforms to a predetermined rule. It may be determined that the search book and the search RFID tag exist within the radiation range of the signal radio wave radiated from the writer 21.

  If it is determined in S17 that the search book and the search RFID tag exist within the radio wave emission range from the reader / writer 21 (S17: YES), then the R / W control unit 22 of the reader / writer 21 is determined. Determines a symbol (for example, an ID assigned to the reader / writer 21) to be displayed on the organic EL element 7 included in the search RFID tag. Next, the identification code information stored in the identification code information storage area 30 of the R / W storage unit 28 is referred to, and an identification code corresponding to the determined symbol is specified (hereinafter, the reader / writer 21 has the ID “ “A” is assigned, and the character of ID “A” is displayed on the organic EL element 7 of the search RFID, and the identification code assigned to “A” is “A”. .)

  Next, the R / W control unit 22 of the reader / writer 21 transmits an identification code signal including the identified identification code “A” to the tag modulation unit 3 (S19). The transmitted identification code signal is modulated by the tag modulation unit 3 to a frequency that can be radiated from the tag antenna 5. Then, the modulated identification code signal is radiated from the tag antenna 5 as a signal radio wave. Thereafter, the R / W control unit 22 returns to S11 and repeatedly executes the above-described processing.

  On the other hand, as shown in FIG. 6, the tag control unit 2 of the RFID tag 1 transmits the unique ID response signal (see S33), receives it by the tag antenna 5, and demodulates it by the tag demodulation unit 4. Monitor the demodulated signal. When the demodulated signal is an identification code signal transmitted from the reader / writer 21 (S35: YES), the tag control unit 2 performs the organic EL element 7 from the reader / writer 21 based on the processing of S19 (see FIG. 5). It is determined that an instruction to display the symbol is given. Then, the tag control unit 2 refers to the display symbol information stored in the display symbol information storage area 10 of the tag storage unit 8 and specifies the symbol “A” corresponding to the received identification code “A”. Then, the specified pattern “A” is displayed on the organic EL element 7 (S37). Then, the tag control unit 2 of the RFID tag 1 ends the notification process.

  On the other hand, if the tag control unit 2 does not receive the identification code signal from the reader / writer 21 after transmitting the unique ID response signal (S35: NO), it is not necessary to display the symbol on the organic EL element 7. Therefore, the notification process is terminated without performing any special process.

  As described above, since the RFID tag 1 of the present embodiment includes the organic EL element 7, it is possible to display a desired design on the organic EL element 7 by designating an identification code. As a result, even when different radio waves are simultaneously transmitted from the different reader / writers to the RFID tag 1 and the plurality of RFID tags 1 that have received the signals are displayed by the organic EL elements 7, the user can By visually recognizing the contents of the symbol displayed on the EL element, it is possible to specify the search RFID tag attached to the book searched for by itself.

  The organic EL element 7 in FIG. 2 corresponds to the “organic EL light emitting element” of the present invention, and the tag storage unit 8 corresponds to the “storage means” of the present invention. Further, in S31 and S35 of FIG. 6, the tag control unit 2 that performs the process of receiving the demodulated signal from the tag demodulation unit 4 corresponds to the “reception unit” of the present invention. In S37, the design is applied to the organic EL element 7. The tag control unit 2 that performs processing for display corresponds to the “display control means” of the present invention.

  In addition, this invention is not limited to the said embodiment, A various change is possible.

  In the embodiment described above, the ID “A” assigned to the reader / writer 21 is used as an example of the symbol displayed on the organic EL element 7, but the content to be displayed is not limited to the ID assigned to the reader / writer 21. . Therefore, other symbols, characters, color display, etc. may be used.

  In the above embodiment, when displaying a predetermined pattern from the organic EL element 7 of the search RFID tag 1, the reader / writer 21 first transmits a unique ID designation signal to the RFID tag 1, By receiving the response signal, it has been confirmed that the search RFID tag exists within the signal radio wave emission range from the reader / writer 21. However, the method of displaying a predetermined pattern on the organic EL element 7 of the search RFID tag is not limited to this method. Therefore, a predetermined pattern may be displayed from the organic EL element 7 on the search RFID tag by transmitting a unique ID-identification code signal that directly designates a unique ID and an identification code.

  In the above-described embodiment, the RFID tag 1 includes the tag antenna 5, and the tag antenna 5 is used when generating drive power and communicating with the reader / writer 21. However, the present invention is not limited to the above-described configuration, and may include a plurality of antennas. For example, the RFID tag 1 may be configured to include a dedicated antenna for performing communication with the reader / writer 21 and a dedicated antenna for generating drive power. A configuration including a dedicated antenna for generating electric power necessary for driving may be used.

1 is a schematic diagram of a book search system 50. FIG. 1 is a schematic diagram showing an electrical configuration of an RFID tag 1. 2 is a schematic diagram showing a power supply configuration of the RFID tag 1. FIG. 2 is a schematic diagram showing an electrical configuration of a reader / writer 21. FIG. 5 is a flowchart of RFID tag search processing executed by the R / W control unit 22 of the reader / writer 21. It is a flowchart of the alerting | reporting process performed in the tag control part 2 of RFID tag 1. FIG.

Explanation of symbols

1 RFID Tag 2 Tag Control Unit 3 Tag Modulation Unit 4 Tag Demodulation Unit 5 Tag Antenna 6 Tag Power Supply Unit 7 Organic EL Element 8 Tag Storage Unit 21 Reader / Writer 22 R / W Control Unit 23 R / W Modulation Unit 24 R / W Demodulator 25 R / W antenna 27 Input unit 28 R / W storage unit

Claims (2)

An antenna,
An organic EL (Electroluminescence) light emitting element that emits light when driven by an electric signal generated when radio waves are irradiated to the antenna;
Storage means for storing the ID;
Receiving means for demodulating and receiving an electrical signal generated in the antenna;
When the ID included in the information demodulated and received by the receiving unit and the ID stored in the storage unit satisfy a predetermined relationship, the organic EL light emitting element is controlled to display an image. An RFID tag comprising display control means.   The said organic EL light emitting element is formed on a base material simultaneously with the said antenna, the said memory | storage means, the said receiving means, and the said display control means in the manufacturing process of the said RFID tag. RFID tag.

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