Patent ID: 6239789
Filing Date: 2001-05-29
Classification: G06F

Abstract:
A method for detecting the position of a first position indicator and a second position indicator on the surface of a sensor unit, the sensor unit comprising a plurality of conductive coils, a means for scanning the coils, and a means for detecting an interaction between the coils and the first position indicator and between the coils and the second position indicator, the method comprising the steps of:designating a first set of coils;scanning the first set of coils for the first position indicator and detecting an interaction between the first set of coils and the first position indicator;designating a second set of coils based upon the detected interaction between the first set of coils and the first position indicator;scanning the second set of coils for the first position indicator and detecting an interaction between the second set of coils and the first position indicator;designating a third set of coils; andscanning the third set of coils for the second position indicator.