Patent ID: 8446380

Claim:
A resistive multi-point touch device, comprising: a plurality of wires, including a plurality of first and second wires intersecting each other in a plurality of intersecting regions, when at least one object suppressing the device, the first and second wires contacting each other to form at least one contact point corresponding to the at least one object; a first driving unit and a first sensing unit, the first driving unit selectively and respectively providing a high potential to the wires, and the first sensing unit sensing the wires provided with the high potential by the first driving unit to sense a plurality of suppressed wires, intersecting regions intersected by the suppressed wires being possibly suppressed intersecting regions, when the wire to which the first driving unit providing the high potential being a first wire, the first driving unit providing a low potential to all the second wires, and when the wire to which the first driving unit providing the high potential being a second wire, the first driving unit providing a low potential to all the first wires; a second driving unit and a second sensing unit, when the second driving unit selectively and respectively providing the high and low potentials to the first and second wires intersecting in each of the possibly suppressed intersecting regions, the second sensing unit sensing the first wire provided with the high potential by the second driving unit to sense any suppressed intersecting region; and a third driving unit and a third sensing unit, the third driving unit respectively driving the wires intersecting in each suppressed intersecting regions, when one of a pair of wires intersecting in any suppressed intersecting regions being driven by the third driving unit, the third sensing unit sensing the other wire not driven in the pair of wires to sense the location of each contact point, wherein the third driving unit provides the high and low potentials to the driven wire and wherein the third sensing unit senses the potential at one or two ends of the wire being sensed.