Non-contact IC card
First Claim
Patent Images
1. A non-contact IC card comprising:
- an information storage unit for storing information;
a communication controller for controlling communication with an external device;
a loop antenna including a plurality of loop coils having different loop areas for transmitting and receiving a radio wave to and from the external device; and
a changeover switch for changing a communication distance between n the external device and the card by selecting one of said plurality of loop coils, wherein the loop coils of the loop antenna include respective fixed conductors, each of which is fixed to a body of the card and shaped to include a gap at a loop part, and a movable conductor which moves with the changeover switch and is removable from the gap of the fixed conductor, and when the changeover switch is inserted in the gap of the fixed conductor of one of the loop coils, the movable conductor is coupled to the corresponding fixed conductor.
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Abstract
A non-contact IC card includes an information storage unit for storing information, a communication controller for controlling communication with an external device, and a loop antenna for transmitting and receiving a radio wave to and from the external device. The non-contact IC card further includes a changeover switch for changing a communication distance between the external device and the card, so that the cost and size of the card can be reduced. The non-contact IC card can be used both in a long-distance mode and in a contact mode, which ensures high security.
112 Citations
14 Claims
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1. A non-contact IC card comprising:
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an information storage unit for storing information;
a communication controller for controlling communication with an external device;
a loop antenna including a plurality of loop coils having different loop areas for transmitting and receiving a radio wave to and from the external device; and
a changeover switch for changing a communication distance between n the external device and the card by selecting one of said plurality of loop coils, wherein the loop coils of the loop antenna include respective fixed conductors, each of which is fixed to a body of the card and shaped to include a gap at a loop part, and a movable conductor which moves with the changeover switch and is removable from the gap of the fixed conductor, and when the changeover switch is inserted in the gap of the fixed conductor of one of the loop coils, the movable conductor is coupled to the corresponding fixed conductor. - View Dependent Claims (2, 3, 4)
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5. A non-contact IC card comprising;
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an information storage unit for storing information;
a communication controller for controlling communication with an external device;
a loop antenna including a plurality of loop coils having different loop areas for transmitting and receiving a radio wave to and from the external device; and
a cut-off unit for forcibly cutting off the communication with the external device, wherein the cut-off unit includes a changeover switch for switch the loop antenna between a state in which transmission and reception are possible and a state in which the transmission and reception are impossible, and the loop antenna includes a loop coil, the loop coil includes a fixed conductor, which is fixed to a body of the card and shaped to include a gap at a loop part, and a movable conductor which moves with the changeover switch and is removable from the gap of the fixed conductor, and the movable conductor is coupled to the fixed conductor when the movable conductor of the changeover switch is inserted in the gap of the fixed conductor. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification