| 摘要 |
<p>With respect to a coordinate input device comprising an operation detection plane at a position in front of a display surface or projection surface, contact with the display surface or projection surface, or the absence thereof, by an input object having a round tip is accurately determined. The coordinate input device provided comprises: processing means that detects a size of the input object blocking detection light that travels along the operation detection plane; processing means that generates a down event of the input object when, after blockage of the detection light is initially detected, it is detected that the size has become greater than a first threshold; and processing means that generates an up event of the input object when, following detection of a maximum value of the size, it is detected that the size has become smaller than a second threshold.</p> |
