Patent attributes
A compact biometric device includes a first light source for emitting light irradiated onto a subject; a first light guide whose surface is inputted with light radiated from the subject and outputs the light from the subject; a second light guide for guiding and irradiating the light emitted from the first light source onto the subject; a photo sensor to detect light output from the end of the first light guide means as a signal; a liquid crystal display installed between the subject and the surface of the first light guide; and a control unit for controlling the display on the liquid crystal display; and a signal processor unit for processing the signals detected by the photo sensor unit. The control unit controlling the liquid crystal display to change the position where light emitted from the subject is input onto the surface of the first light guide.
