Fingerprint input device, personal authentication system, and electronic device

摘要

The present invention provides a fingerprint input device that is small in size and consumes less power. The fingerprint input device (101) includes: a light source unit (2) that emits light (2a) into an inside of a sliding finger (10); and an image pickup unit (1a) that includes a light-receiving area (3a) smaller than an area of a fingerprint image to be read and receives light (2b) scattered from the inside of the finger to a fingerprint surface (10a) in the light-receiving area. The light source unit is arranged on a sliding path of the finger in the vicinity of the image pickup unit so as to irradiate with light the finger, the fingerprint surface of which is in contact with the light-receiving area of the image pickup unit.