| 摘要 |
PURPOSE:To improve responsiveness according to operation, to prevent deterioration of information of a screen, and to perform development of a noble game. CONSTITUTION:When a finger 10 is positioned as shown in a figure, light from a light projecting element Dx3 is cut off on an X-axis by the finger 10 and not received by a light receiving element Tx3. Further, light from a light projection element Dy4 is cut off on an Y-axis by the finger 10, the light is not received by a light receiving element Ty4. Thus, since signals from the light receiving element Tx3 on the X-axis ad the light receiving element Ty4 on the Y-axis are not transmitted, it is decided that the position of the finger 10 is two-dimensional points 3 and 4. This constitution detects and decides that intersections X and Y between an X-axis detecting position and an Y-axis detecting position are selected. |
