Pen-type input apparatus and display-input system

A display-input system comprising:

• a display apparatus comprising a first touch panel;
• and
• a pen-type input apparatus that performs input to the display apparatus;
• wherein
• the pen-type input apparatus comprises:
• a pen-side communication unit that performs communication with the display apparatus;
• and
• a second touch panel that performs linked operation by communicating with the display apparatus;
• the display apparatus comprises a display-apparatus-side communication unit that performs communication with the pen-type input apparatus;
• the pen-type input apparatus comprises an application-linking-control unit that, together with performing control so that a screen for specifying the input format of an application that is executed by the display apparatus is displayed on the second touch panel, notifies the display apparatus of the operation contents to the second touch panel;
• the display apparatus comprises a pen-linking-control unit that reflects a notification from the pen-type input apparatus on operation of an application that is being executed;
• the application-linking-control unit, when the distance from the pen-type input apparatus to the display apparatus is close, prohibits input to the second touch panel;
• the pen-type input apparatus comprises a first posture sensor;
• the display apparatus comprises a second posture sensor;
• and
• the first posture sensor and the second posture sensor detect an angle of the pen-type input apparatus relative to the display apparatus, wherein said prohibition of input to the second touch panel further requires that said relative angle is within a specified range.