| 摘要 |
In a capacitive sensing device for detecting a change in capacitance of an electrode which is caused by contact with a human body, the improvement of determination speed may be enabled. M (m is an integer satisfying n>=m>=2) electrodes are selected from n (n is an integer equal to or larger than two) electrodes. Capacitors connected to the m electrodes are discharged in parallel during a predetermined period, and then charged. During the charging period, a potential of each of the m electrodes is compared with a reference potential. A difference between capacitance values of the capacitors connected to the m electrodes is determined based on a result obtained by the comparison between the m electrodes.
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