Patent ID: 8896547

Claim:
A pointer detection apparatus, comprising: a conductor pattern including N number of first conductors numbered from 0 to {N−1} disposed in a first direction and a plurality of second conductors disposed in a second direction which crosses the first direction; a multi-frequency signal production circuit configured to produce a plurality of signals of different frequencies; a first conductor selection circuit configured to selectively supply said signals of different frequencies produced by said multi-frequency signal production circuit, simultaneously, only to those first conductors Yn through Y{n+s} which are directly adjacent to each other, wherein, when {n+s+1}≦{N−1} or {n−1}≧0, simultaneously supplying, after a defined time interval, said signals of different frequencies only to those first conductors Y{n+1} through Y{n+s+1} or Y{n−1} through Y{n+s−1}, wherein, when {n+s+1}>{N−1} or {n−1}<0, looping around to Y{0} instead of Y{n+s+1} or looping around to Y{N−1} instead of Y{n−1}, wherein n is an integer and 0≦n≦{N−1}, and wherein (s+1) is a total number of the first conductors to which said signals of different frequencies are simultaneously supplied; a second conductor selection circuit configured to selectively receive detection signals from the plurality of second conductors; and a signal detection circuit configured to detect signals of individual frequencies, corresponding to the signals of different frequencies produced by said multi-frequency signal production circuit, which are representative of coupling states at cross points between the first conductors and the second conductors, and are received from said second conductor selection circuit.