Surface shape sensor, identification device using this sensor, and protected system using this device
First Claim
1. A protected system, which performs identification by sensing a surface shape of an object surface, for administering information data, comprising:
- an input unit having a contact surface to be brought into contact with the object surface, said input unit having a plurality of electrodes arranged laterally with intervals in a first direction;
a converter for detecting degrees of an electrical resistance between said plurality of electrodes, and forming data representing a distribution of said electrical resistance in said first direction, said electrical resistance being variable by contact of said contact surface with the object surface;
a comparator for comparing the data formed by said converter with registered data, thereby performing identification;
a system main body having a memory which stores said information data; and
protecting means for switching said system main body between an operable state where said information data is accessible and a disabled state where said information data is not accessible, wherein said protecting means sets said system main body to the operable state when said comparator identifies that the formed data and the registered data coincide.
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Accused Products
Abstract
A device for performing identification by sensing the fingerprint of a finger includes an input unit. The input unit is constituted by a plurality of linear contact electrodes formed on a substrate, and a pressure-sensitive sheet formed on the linear contact electrodes and a resistance thereof changes in accordance with a pressure applied thereto. When the finger touches the surface of the pressure-sensitive sheet, a change in resistance is caused between the electrodes, and this change is converted to data of a one-dimensional electrical signal distribution. The obtained data is compared with registered data, thereby performing identification. The time required for signal processing necessary in the identification device can be decreased.
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Citations
15 Claims
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1. A protected system, which performs identification by sensing a surface shape of an object surface, for administering information data, comprising:
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an input unit having a contact surface to be brought into contact with the object surface, said input unit having a plurality of electrodes arranged laterally with intervals in a first direction; a converter for detecting degrees of an electrical resistance between said plurality of electrodes, and forming data representing a distribution of said electrical resistance in said first direction, said electrical resistance being variable by contact of said contact surface with the object surface; a comparator for comparing the data formed by said converter with registered data, thereby performing identification; a system main body having a memory which stores said information data; and protecting means for switching said system main body between an operable state where said information data is accessible and a disabled state where said information data is not accessible, wherein said protecting means sets said system main body to the operable state when said comparator identifies that the formed data and the registered data coincide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification