Patent ID: 7176899

Claim:
A display operation device, comprising: an operation unit which transmits an operation signal including position information according to a position on a display screen of a monitor; and a control unit which is connected to the monitor, and displays a plurality of selection sections at a predetermined positions on the display screen, which sets a selection section to a selected state when the position information of the operation signal sent from the operation unit corresponds to any one of the plurality of selection sections in a state where the plurality of selection sections are displayed, and sets maintenance areas respectively corresponding to the plurality of selection section; in predetermined ranges on the display screen which ranges each include one of the plurality of selection sections, maintains a state of the display screen in a state thereof before receiving the operation signal, when the position information of the operation signal from the operations unit corresponds to a position within the maintenance area, and, further changes the set ranges of the maintenance area based on the processing of a vibration signal.