| 摘要 |
<p>PURPOSE:To cause an input pen to be cordless by detecting the pressure with a first resistance sheet and a second resistance sheet by a pressure member, namely, that the coordinate designation is executed. CONSTITUTION:When sheets 18a and 18b are pushed by an input pen, an upper sheet 18a and a lower sheet 18b are contacted at a depressed point P (x, y) and both sheets are electrically connected. At this time, when a voltage is impressed only to an electrode 18aa of an upper resistance sheet 18a, the voltage is impressed even to both electrodes 18bc and 18bd of a lower resistance 18b through the depressed point P. Then, when either of the electrodes 18bc or 18d is for example grounded through a resistance, a partial value is outputted to both edges of the resistance. By detecting the partial pressure value of the resistance, when the upper resistance sheet 18a and the lower resistance sheet 18b are insulated, the partial pressure value is not detected and, therefore, it is found that the coordinate input by the input pen is executed.</p> |
