| US 7,575,175 B2 | ||
| Non-contact IC card | ||
| Ryota Odake, Tokyo (Japan); Junichi Ohsako, Tokyo (Japan); Hideo Kawabe, Saitama (Japan); and Mitsunori Ueda, Tokyo (Japan) | ||
| Assigned to Sony Corporation, Tokyo (Japan) | ||
| Appl. No. 10/535,344 PCT Filed Oct. 23, 2003, PCT No. PCT/JP03/13573 § 371(c)(1), (2), (4) Date Oct. 03, 2005, PCT Pub. No. WO2004/049248, PCT Pub. Date Jun. 10, 2004. |
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| Claims priority of application No. 2002-339854 (JP), filed on Nov. 22, 2002. | ||
| Prior Publication US 2006/0118638 A1, Jun. 08, 2006 | ||
| Int. Cl. G06K 19/06 (2006.01) | ||
| U.S. Cl. 235—492 [235/451] | 6 Claims |
| 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.
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