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US 4,794,236 AGranted
IC card system
AssigneeCasio Computer Co., Ltd.
InventorsShigeyuki Kawana, Yoshimi Shigenaga
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Abstract
An IC card system according to this invention adopts a so-called intelligent-type IC card which has an internal power source of its own, can store designation data using the power source, and can display the storage content on a display unit. When the IC card is inserted in a terminal, the presence/absence of designation data is judged from the ON/OFF state of the power source of the card and, thereafter, a predetermined processing operation corresponding to the designation data is executed.
Claims6
An IC card system comprising:
- IC card means including,
- memory means for storing at least transaction data and secret data for identification,
- power source means for supplying power to an internal ciruuit of said IC card means, and
- power source control means for controlling an ON/OFF state of said power source means;
- and
- terminal means, in which said IC card means is inserted, for performing data communication with said IC card means, said terminal means including at least detection means for detecting the ON/OFF state of said power source means of said IC card means when said IC card means is inserted in said terminal means.
3 more elements
Dependencies are inferred from the claim text.