METHOD AND DEVICE FOR THE CONTACT-FREE TRANSMISSION OF DATA FROM AND/OR TO A PLURALITY OF DATA OR INFORMATION CARRIERS, PREFERABLY IN THE FORM OF RFID TAGS
First Claim
1. Method for the contact-free transmission of data from and/or to a large number of data or information carriers (9), preferably in the form of RFID tags or transponders, with the following method steps:
- transmitting one or more interrogation and/or write signals to one or more data or information carriers (9), in particular via an antenna arrangement (5) which is associated with or attached to a read and/or write device (1),reading information from and/or writing information to an individual data or information carrier (9), in that a corresponding information signal is sent and/or received by the data or information carrier (9) via an antenna (15) located on the data or information carrier (9),characterised by the following further features;
after the exchange of a piece of information between a read and/or write device (1) and a data or information carrier (9), said carrier is switched into a standby impedance state (Z4) to reduce an undesired interaction with the antenna field of adjacent data or information carriers (9), this state being distinguished from an initial impedance state (Z1) and communication impedance states (Z2, Z3) during the transmission of an information signal from the data or information carrier (9) or the reception of an information signal by the data or information carrier (9).
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Accused Products
Abstract
A method and device for contact-free transmission of data from and/or to a plurality of data or information carriers provide that, after the exchange of information between a read and/or write device and a data or information carrier, said carrier is switched to a standby impedance mode in order to reduce undesired interaction with data or information carriers adjoining the antenna field. This mode differs from an initial impedance mode and communication impedance modes during the emission of an information signal from the data or information carrier.
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Citations
29 Claims
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1. Method for the contact-free transmission of data from and/or to a large number of data or information carriers (9), preferably in the form of RFID tags or transponders, with the following method steps:
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transmitting one or more interrogation and/or write signals to one or more data or information carriers (9), in particular via an antenna arrangement (5) which is associated with or attached to a read and/or write device (1), reading information from and/or writing information to an individual data or information carrier (9), in that a corresponding information signal is sent and/or received by the data or information carrier (9) via an antenna (15) located on the data or information carrier (9), characterised by the following further features; after the exchange of a piece of information between a read and/or write device (1) and a data or information carrier (9), said carrier is switched into a standby impedance state (Z4) to reduce an undesired interaction with the antenna field of adjacent data or information carriers (9), this state being distinguished from an initial impedance state (Z1) and communication impedance states (Z2, Z3) during the transmission of an information signal from the data or information carrier (9) or the reception of an information signal by the data or information carrier (9). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. Device for the contact-free transmission of data from a large number of data or information carriers (9), preferably in the form of RFID tags or transponders, with the following method features:
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a read and/or write device (1) is provided which comprises one or more antennae (5) or to which one or more antennae (5) can be attached, it being possible to transmit interrogation and/or write signals to one or more data or information carriers (9) via said antennae, a plurality of data and/or information carriers (9) are provided, on which there is contained and/or stored information which can be read by the data or information carrier (9), in particular after an interrogation signal is received by the transmission of an information signal, or to which information can be saved, in particular after a write signal is received, characterised by the following further features; the data or information carrier (9) comprises a microchip (17) which can assume different impedance states (Z1;
Z2;
Z3;
Z4), and which is switched, after an information signal is transmitted and/or received, from a communication impedance state (Z2, Z3) into a standby impedance state (Z4) which is distinguished from an initial impedance state (Z1) and/or from a communication impedance state (Z2, Z3) during the transmission of an information signal from the data or information carrier (9).- View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification