Reversible information display medium of liquid crystal type and non-contact IC card utilizing the same
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United States of America Patent
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Aug 10, 2004
Issued Date -
N/A
app pub date -
Sep 26, 2001
filing date -
Feb 3, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A reversible information liquid crystal display medium is disclosed which is capable of long term information display, even through extremes of heat and pressure, without the addition of energy to maintain the display. A primary ingredient of the liquid crystal display medium is a liquid crystalline composition of high-molecular liquid crystal in which molecules that can function as a liquid crystal are chemically bound to side chains of a high-molecular polymer skeleton through a flexing group. Low-molecular liquid crystal may be added to the liquid crystalline composition in order to reduce the response speed of the liquid crystalline composition. The liquid crystal display medium may be used in the display portion of a contactless integrated circuit (IC) card.
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