| 摘要 |
<p>PROBLEM TO BE SOLVED: To surely eliminate the influences of the noises of electronic equipment while limiting a shutdown period of the electronic equipment such as an inverter to the minimum, without requiring complicated control. SOLUTION: When a voltage signal showing a coordinate is fetched from a pressure sensitive tablet 11 to an AD converter part 12, the drive of a front light 15 by an inverter light control part 16 is stopped to eliminate the influences of the noises of the inverter light control part 16 on the voltage signal from the pressure sensitive tablet 11. With the control of a main control part 17, coordinate fetch cycles T1 required for the processing of detecting the voltage signal and others and non-fetch cycles T2 having the same length thereas for performing no processing of detecting the voltage signal and others are alternately repeated to make a lit period of the front light 15 longer.</p> |
