| 摘要 |
Provided is a position tracing system using ultrasonic wave, where a distance between ultrasonic wave reception sensors can be adjusted. A distance between ultrasonic wave reception sensors can be freely adjusted by user's manipulation, so that a position of a signal generation device implemented by an input pen can be more accurately traced by adjusting the distance between the ultrasonic wave reception sensors according to a size of a moving area of the signal generation device. |
