| 摘要 |
<p>PURPOSE:To make a coordinate detecting speed high by controlling the switching order of an X-Y coordinate in order that a same coordinate continues by every twice. CONSTITUTION:A coordinate input unit in an electrostatic phase detection system is constituted with a resistance plate, a switch group, an indicating pen having equivalent capacity, a phase difference detection circuit, a coordinate transformation circuit, a pendown detection circuit, an X-Y sequence control circuit 18 and the oscillator of a clock 22. The sequence control circuit 18 is constituted with 4-notation and 8-notation counters 23-26, a flip flop(FF) 35, etc., and inputs a pendown detection signal 17 and the clock 22 and outputs an X-Y coordinate switching control signal 19 and a gate circuit control signal 20. Thus, the detecting order of the X-Y coordinate is controlled in order that an X coordinate and a Y coordinate are continuously detected by every twice respectively in an order like Y-X after the coordinate is detected like X-Y. As a result, the coordinate detecting speed can be improved.</p> |
