| 摘要 |
A touch sensor panel can be constructed on a single surface of a substrate as a plurality of distributed RC lines arranged in rows and columns. Each distributed RC line can include alternating connected transistors and metal pads. During operation, the transistors on either side of the metal pads in the rows are alternately gated on and off using non-overlapping gate signals, and pulse travel times for each row in both directions are measured. Similar measurements are taken for the columns. The frequency at which the transistors are gated can be changed to adjust pulse travel times. Equalized travel times are computed as the sum of the pulse travel times in both directions, and indicate which rows and columns have a finger touching it. The un-equalized pulse travel time data can then be used to determine the relative positions of the fingers within the rows and columns.
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