Reader/writer for use with non-contact IC card and reader/writer system
First Claim
1. A non-contact IC card reader/writer system comprising:
- a reader/writer main body electrically connected to a host machine for controlling data communication;
antenna means disposed externally to and electrically connected to said reader/writer main body for transmitting and receiving electromagnetic waves to and from the non-contact IC card in a wireless manner, said antenna means having a board with a plurality of plane portions, the plane portions being arranged at an angle to each other, and a conductor wire being wound in a coil about each of the plurality of plane portions;
input/output means electrically connected to the host machine for inputting and outputting a bidirectional signal to and from the host machine;
transmitter-receiver means for modulating and demodulating electromagnetic waves including trigger signals and data signals transmitted and received by said antenna means;
control means electrically connected between said input/output means and said transmitter-receiver means for controlling the data communication; and
bi-signal level switching means for switching the strength of the output electromagnetic waves emitted by said antenna means between a first level for the trigger signal and a second level for the data signal.
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Accused Products
Abstract
A non-contact IC card reader/writer which offers an improved reliability in communication between a non-contact IC card and its reader/writer by reducing malfunction due to data communication error. The reader/writer includes a reader/writer main body electrically connected to a host machine for controlling communications, and an antenna external to and electrically connected to the reader/writer main body for transmitting and receiving electromagnetic waves to and from the non-contact IC card. Since the antenna is L-shaped in cross section, the non-contact IC card is free from right-angle antenna geometry to the antenna and maintains a good communications link with the reader/writer.
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Citations
10 Claims
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1. A non-contact IC card reader/writer system comprising:
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a reader/writer main body electrically connected to a host machine for controlling data communication; antenna means disposed externally to and electrically connected to said reader/writer main body for transmitting and receiving electromagnetic waves to and from the non-contact IC card in a wireless manner, said antenna means having a board with a plurality of plane portions, the plane portions being arranged at an angle to each other, and a conductor wire being wound in a coil about each of the plurality of plane portions; input/output means electrically connected to the host machine for inputting and outputting a bidirectional signal to and from the host machine; transmitter-receiver means for modulating and demodulating electromagnetic waves including trigger signals and data signals transmitted and received by said antenna means; control means electrically connected between said input/output means and said transmitter-receiver means for controlling the data communication; and bi-signal level switching means for switching the strength of the output electromagnetic waves emitted by said antenna means between a first level for the trigger signal and a second level for the data signal. - View Dependent Claims (2, 6, 7, 8, 10)
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3. A non-contact IC card reader/writer system comprising:
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a reader/writer main body electrically connected to a host machine for controlling data communication; antenna means disposed externally to and electrically connected to said reader/writer main body for transmitting and receiving electromagnetic waves to and from a non-contact IC card in a wireless manner, said antenna means having a board with a plurality of plane portions, said plurality of plane portions being arranged at an angle to and separated from each other, wherein a conductor wire is wound in a coil about each of the plurality of plane portions; input/output means electrically connected to the host machine for inputting and outputting a bi-directional signal to and from the host machine; and transmitter/receiver means for modulating and demodulating electromagnetic waves transmitted and received by the antenna means; and antenna control means for switching between conductor wires on said plurality of plane portions at predetermined intervals, wherein said antenna control means monitors a time period between completion of transmission of one of the electromagnetic waves transmitted by said antenna means and reception of a response to the electromagnetic waves transmitted by said antenna means and wherein said antenna control means switches from a first conductor wire on one of the plurality of plane portions to a second conductor wire on another of the plurality of plane portions when the time period monitored by said antenna control means is greater than a predetermined time period. - View Dependent Claims (9)
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4. A non-contact IC card reader/writer system comprising:
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a reader/writer main body electrically connected to a host machine for controlling data communication; antenna means disposed externally to and electrically connected to said reader/writer main body for transmitting and receiving electromagnetic waves to and from the non-contact IC card in a wireless manner, said antenna means having a board with a plurality of plane portions, the plane portions being arranged at an angle to each other, and a conductor wire being wound about the plurality of plane portions in a coil; input/output means electrically connected to the host machine for inputting and outputting a bidirectional signal to and from the host machine; transmitter-receiver means for modulating and demodulating electromagnetic waves including data signals, the electromagnetic waves being transmitted and received by said antenna means; control means electrically connected between said input/output means and said transmitter-receiver means for controlling the data communication; and bi-time level switching means for switching the strength of the output electromagnetic waves after each data signal transmission cycle to transmit a signal of the same content at a plurality of transmission signal strengths. - View Dependent Claims (5)
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Specification