| 摘要 |
PROBLEM TO BE SOLVED: To allow a displayed figure to be easily rotated by intuitive operation.SOLUTION: A display device comprises: a projection optical system 33 for displaying a video screen on a projection surface 4; a tool information detector 32 for detecting positional information of a plurality of detection points arranged at input tools 3 simulating shapes of stationery together with identification information that is imparted to individual ones of the plurality of detection points and is different from one another among the individual ones of the plurality of detection points; and a controller 34 that discriminates rotation angles of the input tools 3 on the projection surface 4 on the basis of the positional information of the plurality of detection points and displays objects corresponding to the input tools 3. The controller 34 rotationally displays the objects on the basis of the rotation angles discriminated of the input tools 3. |
