| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily provide a highly precise coordinate inputting device with a simple circuit constitution by correcting deviations of offset generated due to changes in temperature. SOLUTION: An oscillation input pen 3 is provided with a driving circuit 21 for driving an oscillator and a delay circuit 22. An arithmetic control circuit 1 applies a driving signal to the driving circuit 21, detects a time required for an oscillation from the oscillation input pen 3 inputted to an oscillation transmitting board to arrive at an oscillation detecting means, and obtains a coordinate position instructed by the oscillation input pen 3 based on the detected arrival time. Also, the arithmetic control circuit 1 inputs a prescribed signal to the delay circuit 22, clocks a delay time by the delay circuit 22 by inputting the return signal, and corrects the arrival time to be used for the calculation of the coordinate position based on the clocked delay time.</p> |
