PORTABLE TERMINAL DEVICE AND INPUT DEVICE

摘要

On a touchpad, an input instruction that matches the operation that a user has intended can be performed so as to improve the operability. A tip coordinate calculating section (21) calculates a tip coordinate (Y) of a contact area, and a center coordinate calculating section (22) calculates a center coordinate (y) of the contact area on the basis of contact information associated with a touchpad (16), which is detected by a detection section (17). A determination section (23) determines whether or not there is a travel of the contact area, and a distance-travelled calculating section (24) calculates the distance travelled by a contact point using the tip coordinate (Y) or the center coordinate (y) according to the result of the determination. Here, the distance travelled is calculated on the basis of the tip coordinate during the travel of the contact area, and the distance travelled is calculated on the basis of the center coordinate during the stop, leaving, and contact start of the contact area. Then, a coordinate output section (25) outputs a relative coordinate or an absolute coordinate as an instruction coordinate which instructs the specific position corresponding to a contact operation on the touchpad (16).