Patent ID: 8179430

Claim:
A biometric authentication device, comprising: an authentication button installed to be vertically movable in such a way that a finger rest part enabling a finger to be placed thereon is formed on an upper portion of the authentication button and an internal passage opened or closed by the finger is formed inside the authentication button; a driving unit including an upper driving unit arranged below the authentication button and configured to be vertically movable, and a lower driving unit diagonally coupled to a bottom of the upper driving unit and configured to be horizontally movable, the driving unit having an upper light transmission passage and a lower light transmission passage, which communicate with the internal passage, to be formed therein; an infrared blocking filter installed in the lower driving unit to divide the lower light transmission passage into an infrared pass region and an infrared blocking region; an elastic element configured to restore the lower driving unit, which has moved horizontally, to an original position thereof using a sensor installed on the lower driving unit and a restoring force; a light source for radiating infrared light onto the finger in response to a signal output from the sensor; and a camera module for capturing an image of the finger.