Signature input apparatus and a signature verification system
First Claim
1. A signature input apparatus comprising:
- a liquid crystal sheet having a conductive layer and a liquid crystal dispersed polymer layer in which a liquid crystal is dispersed in a polymer matrix;
a coordinate pointer for applying static charge onto the liquid crystal sheet causing the handwriting of a signature to appear as a liquid crystal representation; and
a coordinate input unit for detecting handwriting coordinate information of the signature written on the liquid crystal sheet,wherein the static charge applied to the polymer matrix neutralizes by itself over a period of time, causing the handwriting of the signature written on the liquid crystal sheet to disappear solely by itself within a period of time of two minutes or less and commensurate with prevention of unauthorized observation and/or coping of the written signature.
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Accused Products
Abstract
The object is to improve the accuracy of signature input and signature verification and improve security by causing the handwriting of a signature to disappear by itself. The signature verification system includes a signature input apparatus 1 and a signature verifying apparatus 6. Signature input apparatus 1 has an externally charged type liquid crystal sheet 2 which has an underside being adhesive and is placed on a coordinate input unit 3. When a dedicated pen 5 having the function of applying static charge onto this liquid crystal sheet 2 is used to write a signature, the handwriting of the signature is liquid crystal representation on the display area of liquid crystal sheet 2 and this handwriting of the signature will disappear by itself after a predetermined period of time. Further, signature verifying apparatus 6 reads the handwriting coordinate information of a signature output from coordinate input unit 3 for detecting the handwriting coordinate information of a signature and verifies this handwriting coordinate information with the handwriting coordinate information of signatures which have been registered beforehand.
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Citations
15 Claims
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1. A signature input apparatus comprising:
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a liquid crystal sheet having a conductive layer and a liquid crystal dispersed polymer layer in which a liquid crystal is dispersed in a polymer matrix; a coordinate pointer for applying static charge onto the liquid crystal sheet causing the handwriting of a signature to appear as a liquid crystal representation; and a coordinate input unit for detecting handwriting coordinate information of the signature written on the liquid crystal sheet, wherein the static charge applied to the polymer matrix neutralizes by itself over a period of time, causing the handwriting of the signature written on the liquid crystal sheet to disappear solely by itself within a period of time of two minutes or less and commensurate with prevention of unauthorized observation and/or coping of the written signature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 15)
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8. A signature verification system comprising:
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(A) a signature input apparatus comprising;
a liquid crystal sheet having a conductive layer and a liquid crystal dispersed polymer layer in which a liquid crystal is dispersed in a polymer matrix, a coordinate pointer for applying static charge onto the liquid crystal sheet causing the handwriting of a signature to appear as a liquid crystal representation, and a coordinate input unit for detecting the handwriting coordinate information of the signature, wherein the static charge applied to the polymer matrix neutralizes by itself over a period of time, causing the handwriting of the signature written on the liquid crystal sheet to disappear solely by itself within a period of time of two minutes or less and commensurate with prevention of unauthorized observation and/or copying of the written signature; and(B) a signature verifying apparatus for reading the handwriting coordinate information of a signature output from the coordinate input unit and verifies the handwriting coordinate information with the handwriting coordinate information of signatures registered beforehand. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification