| 摘要 |
PROBLEM TO BE SOLVED: To provide a touch determination device capable of determining a touch, without being affected by noise.SOLUTION: The touch determination device selects sequentially two electrode wires, according to a prescribed order from among the plurality of electric wires (16) having respectively capacity electrodes, charges of the selected two electrode wires are reset; a voltage is set to a reference capacity (105) used in a detection operation; one of the capacity terminals of the reference capacity is connected thereafter to one of the selected electrode wires, the other capacity terminal of the reference capacity is connected to the other of the selected electrode wires; voltage signals obtained in the reference capacity are thereby detected as signals; corresponding to electrode capacities of the selected two electrode wires; and the voltage value of each electrode wire is found, based on a large number of the voltage values detected sequentially. Noise is removed as an in-phase noise, even if the noise is generated in the midway of the detection operation, since the electrode capacities are detection-operated using the two electrode wires as a pair. The reference electrode is not required to be arranged in each electrode wire, when detection-operating the electrode capacities, using the two electrode wires as a pair. |
