INPUT DETECTION OF RESOLUTION

摘要

PROBLEM TO BE SOLVED: To provide a method and a system for specifying a position of a movable member in an electronic input device within a range of resolutions defined in advance. SOLUTION: Two offset signals indicate the position of the movable member. The time required for each signal to exceed a threshold level is measured and made into inverse to make clear a relationship of offset sine waves. The offset sine waves are plotted to each other to make clear an approximate circle of an inverse time sample with respect to a cycle. A central reference value with respect to each signal is specified by using the minimum time and the maximum time made into corresponding inverses. As a correlation of the times made into inverses, a quadrant of the said circle is specified. A sector most corresponding to the position of the movable member is specified out of a plurality of predefined sectors defining resolutions within the quadrant. The number of sectors between the position samples of the movable member are accumulated and communicated to a host device. COPYRIGHT: (C)2004,JPO