METHOD FOR MEASURING DISTANCE BETWEEN COORDINATE INDICATOR AND COORDINATE INPUT DEVICE

摘要

A method for measuring distance between a coordinate indicator and a coordinate input device is provided, the method including: an output signal actual amplitude value of a receiving coil of a electromagnetic induction board is measured by a measurement circuit of the electromagnetic induction board of the coordinate input device; according to the output signal actual amplitude value, an output signal rated amplitude value and a preset signal reference amplitude value, determining a distance between the coordinate indicator and the coordinate input device.