BIOMETRIC AUTHENTICATION DEVICE AND BIOMETRIC AUTHENTICATION METHOD

• US 20160256079A1
• Filed: 09/08/2014
• Published: 09/08/2016
• Est. Priority Date: 01/31/2014
• Status: Active Grant

• Current Assignee: Hitachi Industry & Control Solutions, Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi Industry & Control Solutions, Ltd. (Hitachi, Ltd.)
• Inventors: SHIMANO, Kazuki, SHIMIZU, Yasuhiro
• Granted Patent: US 10,117,623 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/0082 adapted for particular medical purposes
• CPC Class Codes: A61B 5/117 Identification of persons methods or arrangements for recognising patterns, e.g. fingerprints, G06F18/00, G06V40/00; identification of persons by analysing their voice or speech G10L17/00
• CPC Class Codes: A61B 5/1171 based on the shapes or appearances of their bodies or parts thereof
• CPC Class Codes: A61B 5/489 Blood vessels
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/7246 using correlation, e.g. template matching or determination of similarity
• CPC Class Codes: A61B 90/30 Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
• CPC Class Codes: G06F 21/32 using biometric data, e.g. fingerprints, iris scans or voiceprints
• CPC Class Codes: G06V 40/14 Vascular patterns
• CPC Class Codes: G06V 40/145 Sensors therefor

Abstract

A biometric authentication device collates pre-registered biometric data for authentication with biometric data acquired during authentication. An imaging section images biometric data acquired by penetration through the finger by near-infrared light from a near-infrared light irradiating section. A control section acquires the biometric data acquired by the imaging section. A visible light irradiating section irradiates a finger inserting section where the finger is inserted with visible light. The visible light irradiating section starts irradiation of the visible light before the imaging section acquires the biometric data. The control section sets irradiation luminosity from the visible light irradiating section to be lower in a case where luminosity of an imaging screen of the biometric data acquired by the imaging section is higher than luminosity appropriate for authentication, and collates the biometric data in the case where the irradiation luminosity is set to be lower with the pre-registered biometric data for authentication.

Claims

1. A biometric authentication device for carrying out biometric authentication using biometric information by collating pre-registered biometric data for authentication with biometric data acquired during authentication, the device comprising:

a near-infrared light irradiating section that irradiates a finger with near-infrared light;

an imaging section that images biometric data acquired by penetration through the finger by the near-infrared light emitted from the near-infrared light irradiating section;

a control section that acquires the biometric data acquired by the imaging section; and

a visible light irradiating section that irradiates a finger inserting section where the finger is inserted with visible light,

wherein the visible light irradiating section starts irradiation of the visible light before the imaging section acquires the biometric data, and the control section sets irradiation luminosity from the visible light irradiating section to be lower in a case where luminosity of an imaging screen of the biometric data acquired by the imaging section is higher than luminosity appropriate for authentication, and

collates the biometric data in the case where the irradiation luminosity is set to be lower with the pre-registered biometric data for authentication.

2. The biometric authentication device according to claim 1,

wherein the control section sets irradiation luminosity from the visible light irradiating section to be unchanged or lower in a case where luminosity of an imaging screen of the biometric data acquired by the imaging section is lower than luminosity appropriate for authentication, and

collates the biometric data in the case where the irradiation luminosity is set to be unchanged or lower with the pre-registered biometric data for authentication.

3. The biometric authentication device according to claim 2,

wherein a decrement in illumination luminosity in a case where the luminosity of an imaging screen of the biometric data acquired by the imaging section is lower than the luminosity appropriate for authentication is smaller than the decrement in illumination luminosity in a case where the luminosity of the imaging screen of the biometric data acquired by the imaging section is higher than the luminosity appropriate for authentication.

4. The biometric authentication device according to claim 1,

wherein the visible light irradiating section has, in a case where authentication is carried out by the biometric authentication device after a first authentication operation different from the biometric authentication device, a function of irradiating the finger inserting section only when authenticated by the first authentication operation.

5. The biometric authentication device according to claim 1,

wherein the visible light to be emitted from the visible light irradiating section to the finger inserting section changes lighting patterns or lighting colors depending on an authentication mode or a way the finger is placed as a result of the biometric authentication.

6. A biometric authentication method for carrying out biometric authentication using biometric information by collating pre-registered biometric data for authentication with biometric data acquired during authentication, the method comprising the steps of:

starting irradiation of visible light before acquisition of biometric data by an imaging section that images biometric data acquired by penetration through a finger by near-infrared light emitted from a near-infrared light irradiating section that irradiates the finger with the near-infrared light, setting irradiation luminosity from the visible light irradiating section to be lower in a case where luminosity of an imaging screen of the biometric data acquired by the imaging section is higher than luminosity appropriate for authentication, and

collating the biometric data in a case where the irradiation luminosity is set to be lower with the pre-registered biometric data for authentication.