INFORMATION PROCESSING SYSTEM, INFORMATION PROCESSING APPARATUS, AND CONTROL METHOD

An information processing system includes a pen having a vibration generator; a display unit with a screen; a touch sensor unit to detect a contact position of the pen on the screen of the display unit; an angle detector to detect a pen angle, which indicates a direction on the screen in which the pen in contact with the screen is tilted; and a pen vibration control unit to generate a vibration waveform signal based on the pen angle detected by the angle detector and a movement direction of the pen to vibrate the vibration generator based on the generated vibration waveform signal.