JP2006024102A - Drive method for data carrier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drive method for a data carrier, transmitting prescribed information for a long service life time without anxiety about battery running out by consumption of a drive power source in the data carrier, without generating confirmation work of residual capacity of a battery, replacement work of the battery, or work for charging the battery. <P>SOLUTION: The data carrier that is an information medium for adding prescribed information to an article, an animal or the like, and allowing reading of the prescribed information in a non-contact state includes a storage means storing at least the prescribed information, and a transmission means wirelessly transmitting the information. In the drive method for the data carrier, a power generation part of a piezoelectric body converting mechanical energy into electrical energy is electrically connected to the data carrier such that voltage generated in the piezoelectric body is supplied to the storage means and the transmission means, the voltage is made to be generated by applying a mechanical shock to the piezoelectric body, and the storage means and the transmission means provided in the data carrier are driven by supplying the voltage to the data carrier to send the prescribed information stored in the storage means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a data carrier that is an information medium that can read predetermined information to a thing / animal and the like, and can read the predetermined information in a non-contact manner. The present invention relates to an RFID driving technique for transmitting or receiving information without contact with a reader / writer.

Conventionally, there have been barcodes, two-dimensional symbols, RFID, and the like as data carriers that are information media that can add predetermined information to objects / animals and read the predetermined information without contact. Among these, a data carrier made up of RFID transmits or receives information without contact with an interrogator (reader / writer) using an electromagnetic field or radio wave, a storage unit for storing information, It is configured with an antenna for transmitting or receiving information without contact, and various names such as an IC tag, an ID tag, an RF tag, a wireless tag, an electronic tag, and a transponder are used.
RFID is an active type (active type) RFID that can emit a radio wave including predetermined information depending on whether it has a built-in power supply or a power supply from the outside. ) Can be divided into two types, that is, a passive type (passive type) RFID that is driven using electric power. Among these, in the active type RFID, the power source for driving is not on the interrogator (reader / writer) side, but on the RFID side, and usually comprises a battery as the driving power source.

Technical magazine OHM December 2003, Item 26

However, in the case of a data carrier consisting of an active type RFID equipped with a battery for driving, the frequency of transmitting predetermined information (usually, an active type RFID is configured to transmit information at a predetermined interval). The battery gradually depletes according to the intensity of the radio wave required for transmission, and eventually cannot generate power for transmitting information. That is, there is a problem that a data carrier composed of RFID cannot actively transmit information, and there is a possibility that predetermined information cannot be transmitted when necessary. Also, the battery life is generally shorter than the life of the RFID storage unit. Therefore, there is a concern that the battery will run out when using a data carrier comprising RFID, so that the remaining capacity of the battery can be confirmed and replaced. In the case of work, or in the case of a secondary battery, there was a problem that work to charge the battery occurred.

Therefore, in the present invention, there is no worry about the battery running out due to the drive power consumption in the data carrier, and there is no need to check the remaining capacity of the battery, replace the battery, or charge the battery. An object of the present invention is to provide a data carrier driving method capable of transmitting information.

In order to solve the above problems, in the invention of claim 1,
A predetermined information is added to an object / animal and the like, and a data carrier, which is an information medium that can read the predetermined information in a non-contact manner, at least storage means for storing the predetermined information, and the information wirelessly And a transmitting means for transmitting, wherein a piezoelectric body that converts mechanical energy into electrical energy is configured to supply a voltage generated by the piezoelectric body to the storage means and the transmitting means. A power generation unit of the body is electrically connected to the data carrier, a voltage is generated by applying a mechanical shock to the piezoelectric body, and the voltage is provided to the data carrier by supplying the voltage to the data carrier. The present invention provides a data carrier driving method characterized in that the storage means and the transmission means are driven, and predetermined information stored in the storage means is transmitted.

As a result, a piezoelectric body that converts mechanical energy into electrical energy is electrically connected to a data carrier, and a mechanical shock is applied to the piezoelectric body to transmit predetermined information. Power is supplied to the data carrier. In general, the life of the piezoelectric body is as long as the life of the storage means of the data carrier, so there is no concern that the battery will run out compared to the case where a battery is used. There is a possibility that maintenance-free operations such as confirmation of the remaining capacity of the battery, replacement of the battery, or charging of the battery will not occur, and that information cannot be actively transmitted from the data carrier consisting of RFID. Therefore, it is possible to provide a driving method that continues to transmit information for a long lifetime.

According to a second aspect of the present invention, there is provided a storage unit for storing predetermined information and a transmission unit for transmitting the information wirelessly to form an IC chip, and the predetermined information including the IC chip. In a data carrier that is an information medium that can read the predetermined information in a non-contact manner, at least two electrodes are formed on a piezoelectric body that converts mechanical energy into electrical energy. Each IC and an IC chip are electrically connected, a voltage is generated by applying a mechanical shock to the piezoelectric body, and the IC chip is provided with the voltage supplied to the IC chip. The present invention provides a method for driving a data carrier, characterized in that the storage means and the transmission means are driven and predetermined information stored in the storage means is transmitted.

As a result, at least two electrodes fabricated on a piezoelectric body that converts mechanical energy into electrical energy and an IC chip are electrically connected, and a mechanical shock is applied to the piezoelectric body, thereby providing predetermined information. In general, the life of the piezoelectric body is as long as the life of the storage means of the data carrier, so compared with the case where a battery is used, There is no worry that the battery will run out, maintenance-free operations such as confirmation of the remaining capacity of the battery, replacement of the battery, or work of charging the battery will not occur, and information can be actively transmitted from the data carrier. It is possible to provide a driving method that continues to transmit information with a long life without fear of disappearing.

According to a third aspect of the present invention, there is provided a storage unit for storing predetermined information and a transmission unit for transmitting the information wirelessly to form an IC chip, and the predetermined information including the IC chip. In a data carrier that is an information medium that can read the predetermined information in a non-contact manner, at least two electrodes are formed on a piezoelectric body that converts mechanical energy into electrical energy. The IC chip is arranged so as to be adjacent to each other via one electrode, the other electrode and the IC chip are electrically connected, and a voltage is generated by applying a mechanical shock to the piezoelectric body. And supplying the voltage to the IC chip to drive the storage means and the transmission means provided in the IC chip, and to send predetermined information stored in the storage means. Of those that provided the driving method.

As a result, an IC chip is disposed so as to be adjacent to one electrode of at least two electrodes formed on a piezoelectric body that converts mechanical energy into electrical energy, and the other electrode is connected to the IC chip. By electrically connecting and applying a mechanical shock to the piezoelectric body, it is possible to obtain driving power for transmitting predetermined information. In general, the lifetime of a piezoelectric body depends on the data carrier. Compared to the case of using a battery, there is no fear that the battery will run out, and the remaining capacity of the battery is checked and the battery is replaced. It is maintenance-free without any post-process work such as work or battery charging, and it does not prevent information from being actively transmitted from the data carrier. In which it becomes possible to provide a driving method of continuously.

According to a fourth aspect of the invention, at least two electrodes formed on the piezoelectric body are provided in a portion where a positive charge is generated according to polarization generated in the piezoelectric body and a portion where a negative charge is generated. As a feature, a method of driving a data carrier according to claim 2 or claim 3 is provided.

Thus, since the electrodes are provided in the positive and negative charges generated according to the polarization of the piezoelectric body, the data carrier driving method according to claim 2 or claim 3 is provided. In addition to the effect, it is possible to efficiently supply the voltage generated in the piezoelectric body to the IC chip, and the impact force from the outside applied to the piezoelectric body can be further reduced, which may cause destruction or damage of the piezoelectric body. Therefore, it is possible to provide a driving method that continues to transmit information for a longer lifetime.

According to a fifth aspect of the invention, the data carrier is an RFID that transmits and receives information stored in the storage means in a non-contact manner with an interrogator (reader / writer) using an electromagnetic field or radio waves. A data carrier driving method according to any one of claims 1 to 4 is provided.

As a result, the RFID is driven by using a piezoelectric body that converts mechanical energy into electrical energy as a drive power supply. Therefore, a drive for transmitting predetermined information by applying a mechanical impact to the piezoelectric body. Power, and there is no risk of running out of batteries, maintenance-free operations such as confirmation of remaining battery capacity, battery replacement work, or battery charging work, and maintenance of RFID. It is possible to provide a driving method that continues to transmit information for a long lifetime without the possibility of actively transmitting information from a data carrier.

According to the present invention, in the data carrier, there is no fear of running out of the battery due to consumption of the drive power supply, and there is no need to check the remaining capacity of the battery, to replace the battery, or to charge the battery. A method of driving a data carrier capable of transmitting information can be provided.

Next, embodiments will be described with reference to the drawings. First, terms used in the description will be defined.

A data carrier refers to an information medium in which predetermined information is added to an object / animal and the like, and the predetermined information can be read without contact. As this information medium, a bar code, a two-dimensional symbol, an RFID, and the like are meant. In the present invention, an RFID is particularly meant. Note that the two-dimensional symbol means PDF417, Date Matrix, Maxi Code, QR Code, or the like.

RFID refers to a type of data carrier that transmits or receives information without contact with an interrogator (reader / writer) using an electromagnetic field or radio waves.
An interrogator (reader / writer) is a device that performs data communication with RFID, control, and processing related to the data.

A piezoelectric material is a substance having piezoelectricity that converts mechanical energy into electrical energy, and generates a voltage proportional to the impact when subjected to a mechanical impact. In general, a piezoelectric region having a piezoelectric property in a ferroelectric region below the Curie temperature is called a piezo element (piezoelectric device), and a piezoelectric material having a piezoelectric property in a paraelectric region above the Curie temperature is called an electrostrictive device. A material having piezoelectricity has spontaneous polarization (charge bias), and there are positive and negative charge centers inside the material. For this reason, when subjected to an impact, positive and negative charges are generated on the surface of the material in the direction of polarization of the entire material, and a voltage is generated between the two charges.

An IC is an electronic circuit in which elements such as transistors, resistors, capacitors, and diodes are collected and mounted on a substrate to have various functions. A chip refers to a packaged electronic circuit (IC).

FIG. 1 shows a first embodiment for embodying the data carrier driving method of the present invention. The data carrier 100 includes a storage unit 101 for storing predetermined information and a transmission unit 102 for wirelessly transmitting the predetermined information, and driving power is supplied to the storage unit 101 and the transmission unit 102. A piezoelectric body 103 is provided as a driving power source for supply.

The predetermined information stored in the storage means 101 is unique information (an ID made up of numerical values and characters) registered in each data carrier, as standardized by ISO, IEC, etc. It can be used to identify objects / animals to which data carriers are added. Usually, the predetermined information and associated data exist, and the target can be known by reading the predetermined information from the data carrier and referring to the associated data.

A piezoelectric material, that is, the piezoelectric body 103 is used as a driving power source. When the power generation unit of the piezoelectric body 103 and the data carrier 100 are electrically connected and a mechanical shock is applied, the generated voltage is supplied to the data carrier 100, whereby the storage unit 101 and the transmission unit 102 are supplied. Is driven to transmit predetermined information.

In order to generate an appropriate voltage for driving the transmission means, it is necessary to select a material having piezoelectricity and to apply an appropriate impact so that the material is not destroyed.

Various mechanisms can be used to apply a mechanical shock to the piezoelectric material. Depending on the state of use, there are a case where a mechanical shock is applied artificially and a case where a mechanical shock is applied to a target to which a data carrier is added in the control process.

As a substance having piezoelectricity, a piezoelectric substance that can convert mechanical energy into electrical energy with high efficiency is effective. For example, a PZT system typified by lead zirconate titanate or a material having a piezoelectric property such as lithium niobate (LiNbO ₃ ) having a high mechanical and electrical coupling constant may be used.

In addition, piezoelectric materials are classified into soft and hard. Soft piezoelectric materials have a low Curie temperature, are prone to depolarization, and have poor reproducibility with respect to impacts. Since a material with a high Curie temperature (300 ° C or higher), depolarization hardly occurs, and a high reproducibility, the use of a hard piezoelectric material generates a voltage with a longer life and good reproducibility. It is possible to drive the storage means and the transmission means.

Thus, since the data carrier 100 is configured and electrically connected to the piezoelectric body 103, a voltage is generated by applying an impact to the piezoelectric body 103 and the data carrier is driven, whereby predetermined information is obtained. Can be provided.

Next, a second embodiment of the data carrier is shown in FIG. The data carrier 200 includes an IC chip 201 provided with a storage unit 2011 for storing predetermined information and a transmission unit 2012 for transmitting predetermined information to the outside wirelessly. The data carrier 200 is connected to the IC chip 201. A piezoelectric body 203 is provided as a driving power source for supplying driving power to the IC chip.

As described above, the predetermined information stored in the storage unit 2011 of the IC chip 201 is unique information (ID consisting of numerical values and characters) registered in each data carrier standardized by ISO, IEC, or the like. The predetermined information can be used to identify the object / animal to which the data carrier is added. Usually, the predetermined information and associated data exist, and the target can be known by reading the predetermined information from the data carrier and referring to the associated data.

The storage unit 2011 is provided with a storage area for storing information, and the storage area is divided into a system area and a user area. The system area is a memory area used for RFID management. The user area is a memory area that can be freely used by the user, and is used by writing predetermined information.

The transmission unit 2012 is provided with a wireless communication circuit that transmits predetermined information to the outside wirelessly, and constitutes a modulation circuit.

The predetermined information is written in advance using an interrogator (reader / writer) or the like before using the data carrier. The power source used at the time of writing uses energy by a carrier wave including predetermined information transmitted from an interrogator (reader / writer). Alternatively, direct writing is performed using a dedicated writing device for the storage means.

As a driving power source, a piezoelectric material, that is, a piezoelectric body 203 is used as in the first embodiment. In the piezoelectric body 203, two electrodes A 204a and B 204b are manufactured, and when the electrodes A and B are electrically connected to the IC chip 201 and a mechanical shock is applied, the generated voltage is generated. Is supplied to the IC chip, the memory means 2011 and the transmission means 2012 provided in the IC chip are driven to transmit predetermined information.

In order to generate an appropriate voltage for driving the transmitting means, it is necessary to select a material having piezoelectricity and to apply an appropriate impact that does not cause the material to break, but as in the first embodiment. Since there is, description is abbreviate | omitted.

The piezoelectric body 203 is electrically connected to the IC chip 201 on one side 203a and the opposite surface 203b in the direction in which the polarization occurs in the piezoelectric body. When a mechanical impact is applied to the piezoelectric body 203, a potential difference occurs between the one surface 203a and the opposing surface 203b, and power can be supplied to the IC chip 201.

Thus, since the data carrier 200 is configured and electrically connected to the electrodes A and B fabricated on the piezoelectric body 203, a voltage is generated by applying an impact to the piezoelectric body and the data carrier is driven. Thus, a driving method for transmitting predetermined information to the outside can be provided.

Next, a third embodiment for realizing the data carrier driving method is shown in FIG. The data carrier 300 includes an IC chip 301 provided with a storage unit 3011 that stores predetermined information and a transmission unit 3012 that transmits predetermined information to the outside wirelessly, and is connected to the IC chip 301. A piezoelectric body 303 as a driving power source for supplying driving power to the IC chip is integrally provided.

As described above, the predetermined information stored in the storage unit 3011 of the IC chip 301 is unique information (ID consisting of numerical values and characters) registered in each data carrier standardized by ISO, IEC, or the like. The predetermined information can be used to identify the object / animal to which the data carrier is added. Usually, the predetermined information and associated data exist, and the target can be known by reading the predetermined information from the data carrier and referring to the associated data.

The storage unit 3011 is provided with a storage area for storing information, and the storage area is divided into a system area and a user area. The system area is a memory area used for RFID management. The user area is a memory area that can be freely used by the user, and is used by writing predetermined information.

The transmission means 3012 is provided with a wireless communication circuit that transmits predetermined information to the outside wirelessly, and constitutes a modulation circuit.

The predetermined information is written in advance using an interrogator (reader / writer) or the like before using the data carrier. The power source used at the time of writing uses energy by a carrier wave including predetermined information transmitted from an interrogator (reader / writer). Alternatively, direct writing is performed using a dedicated writing device for the storage means.

As a driving power source, a piezoelectric material, that is, a piezoelectric body 303 is used as in the first embodiment. In the piezoelectric body 303, two electrodes A304a and B304b are produced, and an IC chip 301 is provided so as to be adjacent to one electrode, in this case, the electrode A304a, and the other electrode, in this case, is connected. The electrode B304b and the IC chip 301 are electrically connected 305. When a mechanical shock is applied to the piezoelectric body 303, the generated voltage is supplied to the IC chip, thereby driving the storage means 3011 and the transmission means 3012 provided on the IC chip to transmit predetermined information. .

In order to generate an appropriate voltage for driving the transmission means, it is necessary to select a material having piezoelectricity and to apply an appropriate impact that does not cause the material to break, but as in the first embodiment. Since there is, description is abbreviate | omitted.

In the piezoelectric body 303, electrodes are formed on one surface 303a and an opposing surface 303b in a direction in which polarization occurs in the piezoelectric body. When a mechanical shock is applied to the piezoelectric body 203, a potential difference is generated between the one surface 303a and the opposite surface 303b, and power can be supplied to the IC chip 201 via the electrodes A and B provided respectively. .

Thus, since the data carrier 300 is configured and integrally connected to the electrodes A and B fabricated on the piezoelectric body 303, a voltage is generated by applying an impact to the piezoelectric body, and the data carrier is By driving, a driving method for transmitting predetermined information to the outside can be provided.

Next, FIG. 4 shows a schematic diagram of a data carrier 400 configured to include a piezoelectric body. In FIG. 3, the piezoelectric body 303 is provided outside the data carrier 300, but in FIG. 4, the data carrier 400 is integrally formed including the piezoelectric body 403. Reference numeral 401 denotes an IC chip, and 404 a and 404 b denote electrodes manufactured on the piezoelectric body 403. The connection between the IC chip and the piezoelectric body is the same as in the embodiment of FIG.

Since the data carrier 400 includes the piezoelectric body 403 as described above, it can be applied to the case where the data carrier 400 is desired to be used alone.

Next, the power generation of the piezoelectric body will be briefly described.
FIG. 5 shows a schematic diagram of polarization inside the piezoelectric body and generated charges. A piezoelectric material used as a power generation element (device) may be a single crystal, but usually a piezoelectric ceramic composed of a polycrystal is often used.

In a piezoelectric ceramic made of polycrystal, the polarization direction is dissipative in each crystal, but the polarization is generated in a certain direction as a whole. When an impact force is applied to the piezoelectric material, the polarization of the crystals acts on each other, generating a positive charge on one side of the crystal and a negative charge on the other side. By creating an electrode on the surface of the crystal where charge is generated, it is possible to supply a voltage according to the impact force to the voltage supply destination by electrically connecting the electrode and the voltage supply destination. is there.

As the piezoelectric body serving as the driving power source, a single crystal or ceramic having a high mechanical / electrical coupling constant can be used. For example, a PZT system represented by lead zirconate titanate or a piezoelectric body made of lithium niobate (LiNbO ₃ ) is used.

In FIG. 4, a pair of electrodes 404a and 404b such as Ag are formed on one side and the opposite side in the direction in which the piezoelectric body 403 is polarized, and a storage area which is a storage means is adjacent to the electrode 404a. In addition, an IC chip 401 provided with a wireless communication circuit as a transmission means is provided, and the electrode 404b and the IC chip 401 are electrically connected 405.

By configuring the data carrier 400 in this way, a voltage is generated by applying a mechanical shock to the piezoelectric body, and the voltage is supplied to the IC chip, whereby the storage means provided in the IC chip. In addition, it is possible to provide a data carrier driving method for driving the transmission means and transmitting predetermined information stored in the storage means.

When a data carrier is used as an RFID, an antenna is usually provided to communicate with an interrogator (reader / writer). As an example, FIG. 6 shows a case where an antenna 402 is provided outside the IC chip 401 of FIG. This data carrier is 600.

An antenna 402 made of aluminum, copper, silver or the like is connected to an IC chip 401 to form a data carrier 400 made of RFID. The antenna may be provided as appropriate in accordance with the frequency to be communicated, but may be exposed to the outside as shown in FIG. May be provided. In this case, when the RFID is used, the antenna can be used without being obstructed and the size can be further reduced, so that the target to which the data carrier is added can be applied to a smaller one.

When a mechanical shock is applied to the data carrier 600 configured in this manner from the outside, the voltage generated in the piezoelectric body 403 is supplied to the IC chip 401, and predetermined information stored in the storage area of the IC chip 401 is wirelessly transmitted. It is transmitted via the antenna 402 by the communication circuit.

In either case, the applied impact must be applied appropriately so that the piezoelectric body does not break.

Further, by using a memory that can read and write the storage area 3011 in the IC chip 301 that has been described as an embodiment of the present invention, and a modulation circuit and a demodulation circuit are provided in a wireless communication circuit, only a read-only RFID is provided. In other words, a read / write RFID can be configured. As described above, the power source used for writing uses energy from a carrier wave including predetermined information transmitted from an interrogator (reader / writer).

In addition, the memory used for the storage means can be written only once in the storage means using a write-once type, that is, an interrogator (reader / writer), using a memory that can be written only once. Can be used as a type that can only read predetermined information. Furthermore, the memory used as the storage means can be divided into bit units or byte units, and can be used as a write-once type in which writing can be performed a plurality of times according to the capacity of the memory by writing each divided area only once.

By configuring the RFID in this way, it is possible to apply from a one-way use for reading predetermined information to a two-way use for writing predetermined information.

The force applied to the piezoelectric body is an impact force, but based on the characteristics of the piezoelectric body, a stress that generates a voltage is applied to the piezoelectric body so that the drive voltage is supplied to the data carrier and RFID. May be.

In the method of driving the data carrier according to the present invention, a battery is not required, and when an impact is applied, the driving power is actively generated and can be used for a long life. There is a possibility that it can be used.

The block diagram which shows 1st embodiment. The block diagram which shows 2nd embodiment. The block diagram which shows 3rd embodiment. The block diagram which shows 4th embodiment. Schematic which showed the electric power generation of a piezoelectric material. The block diagram which shows 5th embodiment.

Explanation of symbols

100 Data carrier 101 Storage unit 102 Transmission unit 103 Piezoelectric body 200 Data carrier 201 IC chip 2011 Storage unit 2012 Transmission unit 203 Piezoelectric body 204a Electrode A
204b Electrode B
300 Data carrier 301 IC chip 3011 Storage unit 3012 Transmission unit 303 Piezoelectric body 304a Electrode A
304b Electrode B
305 Electrical connection 400 Data carrier 401 IC chip 402 Antenna 403 Piezoelectric body 404a Electrode A
404b Electrode B
600 data carrier

Claims (5)

(Method of driving a data carrier by connecting a piezoelectric body)
A data carrier, which is an information medium that can be read in a non-contact manner by adding predetermined information to an object / animal or the like,
Storage means for storing at least predetermined information;
A transmission means for transmitting the information wirelessly;
Comprising
In a piezoelectric body that converts mechanical energy into electrical energy, the power generation section of the piezoelectric body is electrically connected to the data carrier so that the voltage generated by the piezoelectric body is supplied to the storage means and the transmission means. And
A voltage is generated by applying a mechanical shock to the piezoelectric body,
Driving the storage means and the transmission means provided in the data carrier by supplying the voltage to the data carrier;
A method of driving a data carrier, characterized in that predetermined information stored in the storage means is transmitted. (Method of driving by connecting a data carrier including an IC chip and a piezoelectric electrode)
A storage means for storing predetermined information and a transmission means for transmitting the information wirelessly are formed to form an IC chip, and the predetermined information including the IC chip is added to an object / animal, etc. In a data carrier that is an information medium that can read predetermined information without contact,
Create at least two electrodes on a piezoelectric body that converts mechanical energy into electrical energy,
Each electrode and IC chip are electrically connected,
A voltage is generated by applying a mechanical shock to the piezoelectric body,
Supplying the voltage to the IC chip to drive the storage means and the transmission means provided in the IC chip;
A method of driving a data carrier, characterized in that predetermined information stored in the storage means is transmitted. (Driving method by connecting IC chip and piezoelectric electrode next to each other)
A storage means for storing predetermined information and a transmission means for transmitting the information wirelessly are formed to form an IC chip, and the predetermined information including the IC chip is added to an object / animal, etc. In a data carrier that is an information medium that can read predetermined information without contact,
Create at least two electrodes on a piezoelectric body that converts mechanical energy into electrical energy,
The IC chip is arranged so as to be adjacent to each other through a single electrode,
Electrically connect the electrode of the other electrode and the IC chip,
A voltage is generated by applying a mechanical shock to the piezoelectric body,
Supplying the voltage to the IC chip to drive the storage means and the transmission means provided in the IC chip;
A method of driving a data carrier, characterized in that predetermined information stored in the storage means is transmitted. (Position of electrode)
The at least two electrodes formed on the piezoelectric body are provided in a portion where a positive charge is generated according to polarization generated in the piezoelectric body and a portion where a negative charge is generated. The data carrier driving method described. (RFID)
The data carrier is an RFID that transmits and receives information stored in the storage means in a non-contact manner with an interrogator (reader / writer) using an electromagnetic field or radio waves. Item 5. A data carrier driving method according to Item 4.

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