| 摘要 |
A capacitive sensing apparatus includes a plurality of electrically conductive sensing elements that have widths that vary and lengths that traverse a sensing region. The sensing elements include a first sensing element including a first variable-width portion and a second variable-width portion that in combination produce a combined first sensor signal, a second sensing element including a third variable-width portion and a fourth variable-width portion that in combination produce a combined second sensor signal, and a third sensing element including a fifth variable-width portion and a sixth variable-width portion that in combination produce a combined third sensor signal. The first, third and fifth variable-width portions are arranged in a first pattern and the second, fourth and sixth variable-width portions are arranged in a second pattern, wherein the first pattern and the second pattern are bilaterally symmetrical about a median that is substantially equidistant from opposite edges of the sensing region.
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