Patent ID: 8174509
Filing Date: 2012-05-08
Classification: G06F

Abstract:
1. A multi-touch positioning method for a capacitive touch panel, wherein the capacitive touch panel has a plurality of first capacitive sensor pads arranged in a matrix and a plurality of second capacitive sensor pads arranged in a matrix, the first capacitive sensor pads arranged in the same row along a first direction are electrically connected to one another and coupled to a sensing element, the second capacitive sensor pads arranged in the same row along a second direction are electrically connected to one another and coupled to the sensing element, one of the first capacitive sensor pads is adjacent to at least one of the second capacitive sensor pads, a position is defined by one of the first capacitive sensor pads and one of the second capacitive sensor pads which are adjacent to each other, and the method comprises: (a) generating a candidate touching position array correspondingly when the capacitive touch panel is touched by at least two objects, wherein the candidate touching position array comprises a first candidate position group and a second candidate position group, the first candidate position group comprises at least two first candidate positions arranged along the first direction, and the second candidate position group comprises at least two second candidate positions arranged along the first direction; (b1) comparing the signal magnitude which is sensed by the sensing element and corresponds to the first candidate position group with the signal magnitude which is sensed by the sensing element and corresponds to the second candidate position group; and (c1) determining one of the two first candidate positions which is closer to the sensing element along the first direction as a first actual touching position and determining one of the two second candidate positions which is farther from the sensing element along the first direction as a second actual touching position when the signal magnitude corresponding to the first candidate position group is larger than the signal magnitude corresponding to the second candidate position group.