| 摘要 |
A capacitive sensing apparatus generates at least one logical signal in response to the proximity of a conductive object. The capacitive sensing apparatus comprises at least one first sensor electrode, a first capacitance being induced by the conductive object in proximity with the or each first sensor electrode. A second sensor electrode is disposed adjacent to the or each first sensor electrode, a second capacitance being induced by the conductive object in proximity with the second sensor electrode. The apparatus is configured to maintain the or each first sensor electrode and the second sensor electrode at substantially equal voltage potentials with respect to a common ground, and to detect relative changes in the first capacitance with respect to the second capacitance, wherein the or each logical signal is indicative of a status condition in which the relative changes in the first and second capacitances exceed at least one preset threshold. |
