Smart card

Details Smart card Smart card

1998-06-04

2000-04-18

Le, Thien M.

Registers

Records

Conductive

349 1, 349158, G06K 1906, G02F 113, G02F 11333

Patent

active

060504943

ABSTRACT:
A smart card includes a transparent circuit board on which an integrated circuit, function switches, a power source, and other parts are mounted, an upper substrate facing the circuit board, upper and lower electrodes respectively located on facing surfaces of upper substrate and the circuit board, orthogonal to each other, orientation films coating the upper and lower electrodes, and a liquid crystal material located and sealed between the upper and lower electrodes.

REFERENCES:
patent: 3751137 (1973-08-01), Fitzgibbons et al.
patent: 4876441 (1989-10-01), Hara et al.
patent: 5244840 (1993-09-01), Kodai et al.
patent: 5870163 (1999-02-01), Watanabe et al.

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