Information processing device and control method

A method for controlling an information-processing device having at least one display device and an operator unit that is displaced from a reference point, the method comprising:

• detecting, by a displacement detection unit, a displacement amount of the operator unit;
• supplying, by a signal supply unit, the at least one display device with a control signal for changing an image displayed on the at least one display device, depending on the displacement amount detected by the displacement detection unit;
• determining, by a mechanical force determining unit, a mechanical force applied to the operator unit, depending on a display rewrite time period per unit information amount in the at least one display device, the mechanical force being determined to be a first mechanical force when the display rewrite time period is a first time period, the mechanical force being determined to be a second mechanical force when the display rewrite time period is a second time period, the second mechanical force being less than the first mechanical force, the second time period being shorter than the first time period, the second time period being greater than zero;
• and
• providing, by a mechanical force providing unit, the mechanical force determined by the mechanical force controller, to the operator unit, the mechanical force preventing the displacement of the operator unit, the first mechanical force being applied when the information-processing device is turned on.