Patent ID: 7492169

Claim:
An electrostatic detection apparatus for detecting a coordinate position by using a programmed computer, the electrostatic detection apparatus comprising: a sensing area to which a body to be detected contacts or approaches; a plurality of sensor electrodes in which an electrostatic capacitance is formed as a coordinate in a sensing area and that output a position of the body to be detected as a data signal indicating the change of the electrostatic capacitance; an extension line for connecting a section between the individual sensor electrodes and an external circuit provided outside the sensing area; an extension area that is provided in the vicinity of the sensing area and in which the extension lines are arranged densely; detection means for obtaining a data signal in all the coordinates in the sensing area when an area in a predetermined range adjacent to the extension area within the sensing area is assumed to be a non-sensing area and the area other than the non-sensing area is assumed to be an operating area; determination means for determining as to from which one of the non-sensing area and the operating area the detected data signal is output; and coordinate specification means for specifying a coordinate position of the body to be detected by using the data signal when it is determined that the data signal is output from the operating area.