| 摘要 |
<p>PROBLEM TO BE SOLVED: To eliminate a defect due to leak current in a pressed-state detection method for a matrix type pressure-sensitive sensor.SOLUTION: Voltage measuring means is a detection method that uses a matrix type pressure-sensitive sensor grounded via reference resistance. The voltage measuring means is connected to one sensing electrode (S), and a drive voltage (V) is applied to all drive electrodes, thereby obtaining the voltage measurement value Vof the sensing electrode (S). Subsequently, the voltage measuring means is connected to the sensing electrode (S), a drive voltage (V) is applied to one drive electrode, remaining drive electrodes are grounded, and a voltage measurement value Vis obtained. A resistance value Rat an intersection area is calculated from the following formula: R=(V-V)×R/V, in which Ris the resistance value of the reference resistance.</p> |
