Rolling wheel type fingerprint identification module

Abstract

A roller-type fingerprint identification module includes an image acquiring unit, a main roller, a plurality of sensing points, and a sensing unit. By rolling the main roller with a finger in a fixed direction to pass the sensing points on the main roller through the sensing unit, the image acquiring unit is driven by the sensing unit to continuously acquire fingerprint image on each part. Compared with conventional image acquiring unit with 8-dimentional arrangement, the invention can adopt image acquiring unit with 1-dimentional or 2-dimentional arrangement to greatly reduce production cost. A finger can move along a linear direction and difficult image combination caused by passing fingers through the image acquiring unit in different speeds is prevented.

Description

technical field [0001] The invention relates to a roller-type fingerprint recognition module, in particular to a roller-type fingerprint recognition module that uses a roller to pass through a sensing unit to control the capture of an image capture unit. Background technique [0002] Existing fingerprint authentication systems have been widely used in various fields, such as notebook computers, PDAs, mobile phones, security systems, e-commerce authentication, etc., which have the advantages of uniqueness of authentication and no need for additional equipment and input. The well-known fingerprint reader presses all the fingerprints of the finger on the image capture unit of the fingerprint reader at one time to capture the image of the entire fingerprint at one time, and then sends it to an external database for comparison. However, this image capture The pick-up unit is limited by the size of the finger, thus increasing the manufacturing cost. [0003] And another kind of f...

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Problems solved by technology

[0002] Existing fingerprint authentication systems have been widely used in various fields, such as notebook computers, PDAs, mobile phones, security systems, e-commerce authentication, etc., which have the advantages of uniqueness of authentication and no need for additional equipment and input. The well-known fingerprint reader presses all the fingerprints of the finger on the image capture unit of the fingerprint reader at one time to capture the image of the entire fingerprint at one time, and then sends it to an external database for comparison. However, this image capture The pick-up unit is limited by the size of the finger, thus increasing the cost of production

[0003] And another kind of fingerprint reader, in order to reduce the length of the image capture unit, for example, the original image capture unit is reduced to eight rows of image capture units, that is, the area of ​​the image capture unit is not enough to cover one Complete fingerprints, but the finger needs to be slid over the image capture unit, and the image capture unit captures the fingerprint of a certain part of the finger at an interval, and then the image is stitched by the external processing unit, but the stitching The process is too complicated and requires a lot of calculations, and errors often occur that cause verification failures. For example, the different speeds of fingers sliding over the image capture unit will cause difficulties in image stitching, or fingers sliding over the image capture unit When not using a straight line path, resulting in image stitching errors

[0004] Therefore, the above-mentioned well-known fingerprint reader obviously has many shortcomings, and needs to be improved

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