COORDINATE INPUT APPARATUS, CONTROL METHOD THEREOF AND COORDINATE INPUT SYSTEM

摘要

This invention provides a coordinate input apparatus which improves the operability of a touch operation. The coordinate input apparatus according to the present invention comprises: a determination unit configured to periodically determine whether a pointer exists in a detection region; a derivation unit configured to derive a coordinate value of the pointer; a detection unit configured to detect incoming of the pointer to the detection region and outgoing of the pointer from the detection region; and an output unit configured to output an event signal representing outgoing of the pointer together with a coordinate value associated with the outgoing, wherein the coordinate value associated with the outgoing is corrected by using a coordinate value derived by the derivation unit upon detecting incoming prior to the outgoing.