Patent ID: 8681095

Claim:
An operation input unit comprising: a display; a head-mounted unit mounted on the head of an operator; an operating unit to which an operating signal for a displayed object displayed on the display is input by the operation of the operator; a relative-position detecting section that detects the relative position between the head-mounted unit and the operating unit; and a control unit that controls the displayed object by switching between a first control mode and a second control mode and between the second control mode and a third control mode, on the basis of the relative position detected by the relative-position detecting section; wherein, in the first control mode, the motion of the displayed object is controlled in accordance with an operating signal input to the operating unit; wherein, in the second control mode, the motion of the displayed object is controlled by limiting an operating signal input to the operating unit; and wherein, in the third control mode, the motion of the displayed object is controlled to be stopped regardless of an operating signal input to the operating unit; wherein the control unit switches from the first control mode to the second control mode when the relative position between the head-mounted unit and the operating unit goes out of a first predetermined range but remains within a second predetermined range and the control unit switches from the second control mode to the third control mode when the relative position between the head-mounted unit and the operating unit goes out of the second predetermined range, the second predetermined range being greater than the first predetermined range.