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Fingerprint reading device and method

A fingerprint reading and device technology, which is used in the acquisition/organization of fingerprints/palmprints, instruments, computer parts, etc., and can solve the problems of high cost, complex structure, and the lack of well-designed applications of fingerprint reading devices.

Inactive Publication Date: 2005-01-05
SII SEMICONDUCTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is no well-designed application about what kind of device to combine this type of fingerprint reading device, and how the fingerprint reading device is used, so few fingerprint reading devices are used
In addition, in the case of optical type devices, problems of relatively high cost and complicated structure arise

Method used

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  • Fingerprint reading device and method
  • Fingerprint reading device and method
  • Fingerprint reading device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Examples of the present invention will be described below.

[0022] Fig. 1 schematically shows the structure of a fingerprint reading device in one example.

[0023] As described in FIG. 1, a fingerprint reading device 10 has such a geometric structure that a light guide plate 12 is placed on the surface of an active matrix liquid crystal cell 11, and a light receiving device 13 is placed flush with the light guide plate. 12 are juxtaposed at one end, and an illumination source 14 is placed on the rear surface of the liquid crystal cell 11.

[0024] Here, the active matrix liquid crystal cell 11 has a structure in which a first transparent substrate 21 is combined with a second transparent substrate 22 through a spacer 23 and a liquid crystal layer 24 is interposed therebetween. In addition, transparent electrodes 25 and active elements 26 are arranged on the inner side of the first transparent substrate 21, equivalent to pixels in the form of a two-dimensional array, ...

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PUM

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Abstract

A fingerprint reading system is provided, which is capable of enhancing versatility when actually used, increasing productivity and reducing costs. An illumination device emits the light from a rear surface side of an active matrix liquid crystal cell. A light guiding plate provided on a surface side of the active matrix liquid crystal cell, transmits the light coming from the rear surface side and deflects the light coming from the surface side toward one side end surface. A light receiving device provided on the side of one side surface of the light guiding plate receives the light exiting from this one side surface. A drive circuit makes the active matrix liquid crystal cell pinpoint-irradiate a fingerprint in contact with the light guiding plate by pinpointing with the light emitted from the illumination device and makes the light receiving device pinpoint-receive the light reflected by the fingerpoint, thereby obtaining an image of the fingerprint.

Description

technical field [0001] The present invention generally relates to fingerprint reading devices, and methods thereof. Background technique [0002] Heretofore, some systems for authenticating individuals for the purpose of confidentiality etc. use ID numbers and passwords and the like, however, keeping confidentiality with it is not perfect because ID numbers and passwords may be leaked. On the other hand, a fingerprint reading device is recommended because a higher level of security can be maintained. [0003] An electrostatic capacitance type fingerprint reading device (Japanese Unexamined Patent Application No. Hei4-231803, etc.) is proposed to detect fingerprint patterns by utilizing the fact that an electrostatic capacitance is generated between a group of electrodes arranged in a two-dimensional array. , the change in contact between the finger and the electrode group through the insulating material layer is equivalent to the wrinkles of the fingerprint. This type of f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/117G01B11/24G01B11/245G06K9/00G06T1/00
CPCG06K9/0004G06V40/1318
Inventor 河原行人藤田宏之松平努
Owner SII SEMICONDUCTOR CORP