Patent ID: 7575175
Filing Date: 2009-08-18
Classification: G06K,G09G

Abstract:
1. A contactless IC card that exchanges information with an external data processor in a non-contact manner by an electromagnetic wave, the contactless IC card including: a rectifying unit for rectifying an electromagnetic wave sent from the data processor; an electric double-layer capacitor for storing a rectified power supplied from the rectifying unit; a controlling unit for controlling the information exchange with the data processor and the display of information received from the data processor; a displaying unit having a storing function to hold the display even after power supply is stopped and which displays the information under the control of the controlling unit; and an information selecting unit physically operable by a user for selecting information to be displayed on the displaying unit from the information stored in a storage unit, wherein, the electric double-layer capacitor is configured to store, for a shorter time than a time required for writing information, a sufficient power for supply to each component of the contactless IC card until the information is completely written to the displaying means under the control of the controlling unit.