Discrimination medium and discrimination method for discriminating the same

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United States of America Patent

PATENT NO 8652592
APP PUB NO 20100194092A1
SERIAL NO

12760314

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A discrimination medium on which printing can be freely performed, which cannot be easily falsified, in which the authenticity can be easily discriminated by unique appearance, and which can be produced at low cost, is provided. A cholesteric liquid crystal layer 10, and a breakable print recording layer are laminated in the discrimination medium. The cholesteric liquid crystal layer 10 has plural light transparent films, which are laminated and are different from each other in refraction index. Therefore, the discrimination medium has unique optical characteristics such that a character, a symbol, a pattern, a figure formed by printing by a thermal printer or the like changes in color depending on the viewing angle. A discrimination method using the above optical characteristics of the discrimination medium is provided.

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Patent Owner(s)

  • NHK SPRING CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hoshino, Hidekazu Yokohama, JP 47 1048
Takeuchi, Itsuo Yokohama, JP 39 866

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