Portable terminal and input control method

A portable terminal comprising:

• a finger sensor that recognizes, in response to contact of a finger, a contact and a movement of the finger;
• and a conversion unit that converts the movement of the finger recognized by the finger sensor into an input event corresponding to an operation instruction to an application running on the portable terminal, wherein
• if a period of time from recognition of release of the finger from the finger sensor to recognition of placement of the finger on the finger sensor is less than a predetermined amount of time, then the conversion unit does not convert to the input event the recognition of the placement of the finger and the recognition of the movement of the finger until the recognition of the release of the finger after the recognition of the placement of the finger, and
• when utilizing the finger sensor for operation inputs, besides for fingerprint authentication, the conversion unit excludes detection results resulting from unintentional operations on basis of characteristic phenomena which results from the recognition of the movement and the placement of the finger, which is detected when the finger touches the finger sensor unintentionally, wherein
• as to prevent erroneous recognitions from being detected in the finger sensor as the recognition of the movement and the placement of the finger, the conversion unit measures not an amount of time from the recognition of the finger release to the recognition of the finger placement but the amount of time from the recognition of the finger placement to a next recognition of the finger placement.