Patent ID: 7443387

Claim:
A coordinate input apparatus for detecting a pointed position on a coordinate input region, comprising: a plurality of detection means for detecting the presence of a pointing operation of pointing means on the coordinate input region; specifying means for specifying a signal change range generated in a plurality of detection signals of the plurality of detection means; and calculation means for calculating the coordinate of the pointed position of the pointing means in accordance with a first intersection of a first bisector of a first angle and a bisector of a second angle; wherein said first angle is specified by a first line and a second line, said first line connects a coordinate specified by one end of a first signal change range generated in a first detection signal of first detection means of the plurality of detection means and a first reference position of said first detection means, and said second line connects a coordinate specified by one end of a second signal change range generated in a second detection signal of second detection means of the plurality of detection means and a second reference position of said second detection means, wherein said second angle is specified by a third line and the second line, and said third line connects a coordinate specified by the other end of the first signal change range and the first reference position.