| 摘要 |
A pointing input device includes a sheet-like light beam layer and a detector. The sheet-like light beam layer abuts a display screen and is distributed on a surface of a display screen, and includes plural light beams. The sheet-like light beam layer is generated by at least one light-generating module having a dot light source. The detector is for detecting a light spot composed of plural reflective beam when a physical object is intervened into the sheet-like light beam layer, so that a pointing input operation is performed on a specified position of the display screen corresponding to the light spot. Once the physical object is intervened into the sheet-like light beam layer, the light beams are sheltered by the physical object, so that the light spot with a reflective bright border is resulted from a touching action of the physical object. |
