| 摘要 |
<p>PURPOSE:To detect plural point coordinates pressed on a tablet by selectively measuring the values of currents, which flow by the contacting of a resistance film, while a switch means is switched. CONSTITUTION:When the coordinate value of a contact point are detected on the basis of the values of currents flowing to resistance films 11 and 12 through the contact point when the resistance films 11 and 12 come into contact, current measuring means 15a to 15d are provided by electrodes so as to measure the values of currents flowing to the electrodes 13a to 13d provided to the resistance films 11 and 12. The currents measured by the switch means 15a to 15d can be turned ON and OFF by switch means 14 to 14d provided by the electrodes. Then the switch means 14a to 14d are selectively switched and the current measuring means 15a to 15d measures the value of a current flowing to a specific resistance film. Then specific operation based upon the measured current value is performed to detect the coordinate values of plural contact points.</p> |
