| 摘要 |
A spatial input device includes a light beam scanner, a photodetector, and a controller. The light beam scanner is configured to emit light beams toward a spatially projected image while two-dimensionally scanning the light beams. The photodetector is configured to detect the light beams that have been reflected by an input object within a detection range. The detection range extends inward of the spatial input device relative to the image. The controller is configured to count a scan line number indicative of a number of the light beams that have been detected by the photodetector, and to detect a depth position of the input obj ect based on the scan line number. |
