Non-contact IC card

Details Non-contact IC card Non-contact IC card

2003-10-23

2009-08-18

Lee, Seung H (Department: 2887)

Registers

Records

Conductive

C235S451000

Reexamination Certificate

active

07575175

ABSTRACT:
In a contactless IC card (1), a rectification circuit (17) rectifies an electromagnetic wave received via an antenna (10) to provide a DC voltage, and an electric double-layer capacitor (18) quickly stores the power from the rectification circuit (17). The electric double-layer capacitor (18) supplies the electric power to circuits such as a modem (11), CPU (12), memory (13), controller IC (14), driver IC (15), etc. for operation, and rewrites information for display on a display device (16) using a cholesteric liquid crystal, ferroelectric liquid crystal or the like.

REFERENCES:
patent: 5679939 (1997-10-01), Watanabe
patent: 5995018 (1999-11-01), Hane et al.
patent: 6252564 (2001-06-01), Albert et al.
patent: 6459588 (2002-10-01), Morizumi et al.
patent: 2001/0003445 (2001-06-01), Gauther et al.
patent: 19633945 (1998-02-01), None
patent: 10035094 (2002-03-01), None
patent: 2275654 (1994-09-01), None
patent: 07-20650 (1995-04-01), None
patent: 2003076967 (2003-03-01), None
patent: 259570 (2003-09-01), None
Japanese Office Action issued on Apr. 1, 2008 in connection with Japanese Patent Application No. 11-208972.

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