Patent ID: 8564557
Filing Date: 2013-10-22
Classification: G01R,G06F

Abstract:
1. A device for parallel-scanning (Horizontal scanning) differential touch detection, comprising: a differential unit for generating a plurality of first outputs based on a plurality of first inputs in each scan of total i scans, wherein the kth first output in the jth scan of the total i scans is the (i*(k−1)+j) th first output in a continuous plurality of first outputs, wherein i≧2, j≧1, k≧1 and i, j, k are natural numbers; and a first selecting unit operatively coupled to a plurality of sensors of a touch panel for providing the first inputs, wherein each of the first inputs is operatively coupled to one of i continuous of the plurality of sensors in the total i scans; wherein the differential unit includes a plurality of dual-differential subtractors, and the first inputs include plurality sets of three inputs, each of the dual-differential subtractors generating one of the first outputs based on one of the plurality sets of three inputs, wherein each of the dual-differential subtractors includes: two first subtractors, inputs of which being connected in series; and one second subtractor for receiving outputs of the two first subtractors and generating one of the first outputs.