| 摘要 |
<p>PURPOSE:To execute correction with irreducible minimum operation by judging whether it is necessary to correct an oscillation arriving time by the reacting fluctuation of respective circuit elements to be related to the detection of oscillation arrival or not based on detected temperature information and alarming the correction. CONSTITUTION:A user has an oscillating pen 3 in a hand and inputs coordinates in a position on an oscillation transmitting board 8. The oscillation transmitting board 8 transmits ultrasonic oscillation, which is received from the oscillating pen 3, to oscillation sensors 6a-6c. Signals to be detected by the sensors 6a-6c are respectively given to a signal waveform detecting circuit 9 and from an oscillation transmitting time to the sensor to be obtained by the detecting circuit 9, the position of the oscillating pen 3 is detected in an arithmetic and control circuit 1. At such a time, the arithmetic and control circuit 1 judges whether it is necessary to correct the reacting fluctuation arriving time of the respective circuit elements to be related to the detection of the oscillation arrival or not based on the temperature information to be detected by a temperature sensor 12. Then, when it is judged that the correction is needed, such a condition is alarmed by a buzzer 13 and the prescribed operation of the coordinate input to be related to correction processing is requested.</p> |
