Biometric Authentication Device and Method

A biometric authentication device, for verifying at least a biometric on a portion of a creature (portion-to-be-verified or PTBV, thereinafter), the PTBV comprising at least a portion of a first finger member and a second finger member of a finger, said biometric authentication device comprising:

• a carrier base, having an upper opening for receiving at least the first finger member and the second finger member of the PTBV, which the upper opening further has a base plane and at least one lateral surface:
• a position structure, located at the carrier base at a position respective to the upper opening, being used to assist the PTBV to anchor at a predetermined position at the carrier base in the upper opening;
• at least one light source unit, located at the at least one lateral surface of the carrier base respective to the upper opening;
• in the case that the PTBV reaches the predetermined position, the at least one light source unit being positioned laterally to the PTBV, and the at least one light source unit being able to project at least one lateral light onto the PTBV in such a manner that, said lateral light penetrating both the first finger member and the second finger member of the PTBV so as to generate a fingerprint image and a vein image respectively corresponding to the first finger member and the second finger member of the PTBV;
• a light guide module, located inside the carrier base at a position under the base plane respective to the upper opening;
• and
• an image-sensing unit, located inside the carrier base to receive both the fingerprint image and the vein image and further to form thereby a corresponding detection signal readable to a computer:
• both the fingerprint image and the vein image entering the carrier base through the base plane of the upper opening and being further to be projected onto the image-sensing unit via the light guide module;
• wherein, the fingerprint image is generated by having the lateral light penetrating the first finger member, while the vein image is generated by having the lateral light penetrating the second finger member;
• wherein the light guide module is separated into a fingerprint-detecting area and a vein-detecting area;
• the fingerprint image being formed on the image-sensing unit through the fingerprint-detecting area of the light guide module, the vein image being formed on the image-sensing unit through the fingerprint-detecting area of the light guide module;
• wherein the first finger member contacts a top surface of the fingerprint-detecting area in order to generate the fingerprint image when the lateral light penetrates the first finger member, the second finger member is located above but does not contact another top surface of the vein-detecting area in order to generate the vein image when the lateral light penetrates the second finger member.

A biometric authentication method, for verifying at least a biometric on a portion of a creature (portion-to-be-verified or PTBV, thereinafter), the PTBV comprising at least a portion of a first finger member and a second finger member of a finger, said biometric authentication method comprising the steps of:

• providing a biometric authentication device, the biometric authentication device comprising:
• a carrier base, at least one light source unit, a light guide module, an image-sensing unit and a control module;
• the carrier base being used to receive at least the first finger member and the second finger member of the PTBV, the at least one light source unit being to project a light onto and also penetrating both the first finger member and the second finger member of the PTBV so as to generate a fingerprint image and a vein image respectively corresponding to the first finger member and the second finger member of the PTBV, the light guide module being to guide the fingerprint image and the vein image toward the image-sensing unit, the image-sensing unit being to receive the fingerprint image and the vein image and thereby further to generate a detection signal readable to a computer;
• wherein the detection signal includes simultaneously messages of the fingerprint image and the vein image;
• wherein the control module connecting electrically at least with the at least one light source unit and the image-sensing unit is to receive the detection signal from the image-sensing unit;
• arranging the PTBV to the biometric authentication device so as thereby to generate simultaneously the detection signal including the messages of the fingerprint image and the vein image;
• the control module of the biometric authentication device receiving the detection signal and further extracting thereinside a fingerprint feature data from the fingerprint image and a vein feature data from the vein image;
• and
• applying an authentication unit to compare the fingerprint feature data and the vein feature data received from the image-sensing unit of the control module with the fingerprint feature data and the vein feature data pre-stored in a feature database so as to generate a comparison result;
• wherein, the fingerprint image is generated by having the light penetrating the first finger member, while the vein image is generated by having the light penetrating the second finger member;
• wherein the light guide module is separated into a fingerprint-detecting area and a vein-detecting area;
• the fingerprint image being formed on the image-sensing unit through the fingerprint-detecting area of the light guide module, the vein image being formed on the image-sensing unit through the fingerprint-detecting area of the light guide module;
• wherein the first finger member contacts a top surface of the fingerprint-detecting area in order to generate the fingerprint image when the light penetrates the first finger member, the second finger member is located above but does not contact another top surface of the vein-detecting area in order to generate the vein image when the light penetrates the second finger member.