Patent ID: 8866776

Claim:
An information processing device provided with a display on a front face of a main device body, comprising: a rear face touch pad provided on a rear face of the main device body and configured to detect a position of contact by a user as a point of contact; a control information conversion unit configured to convert information indicating the point of contact detected on the rear face touch pad into information indicating a process that should be performed, in accordance with a predefined conversion rule; and an information processing unit configured to execute the process that should be performed and to update a display screen on the display, wherein, when the point of contact is moved while contact is maintained, the control information conversion unit calculates a directional component of the amount of movement along a predefined direction of an axis and converts the information whereby the display screen is scrolled only in a predetermined direction of the axis by the amount of movement corresponding to the calculated directional component, and wherein the control information conversion unit switches the predetermined direction of the axis by determining which of a predefined range of angles an angle of an initial direction of movement of the point of contact belongs to.