Abstract: The present invention intends to provide a method for liveliness detection and fitness measurement using information optically extracted from a fingertip. For liveliness detection, the present method examines the change in a color index of a finger at its touching portion measured while the finger is being pressed onto an inspection surface and while the finger is released from the same surface. If the change is equal to or larger than a predetermined value, the finger is regarded as a live finger. For fitness measurement, an index indicative of the stiffness of the blood vessel of the finger is obtained from the change in the color index of the finger at its touching portion against the change in the contact area of the finger while the finger is being pressed onto the inspection surface.

Abstract: A display unit comprises a display region constituted of twenty-four display segments each of which has a triangular display surface. The display region consists of a quadrangular central region and a quadrangular and annular peripheral region surrounding the entire central region. The central region has two quadrangular portions arranged one above the other. Each of two quadrangular portions consists of four display segments. The peripheral region is constituted of sixteen display segments.