Device and method for detecting position using electromagnetic i

Details Device and method for detecting position using electromagnetic i Device and method for detecting position using electromagnetic i

1995-07-25

1998-06-09

Kuntz, Curtis

Telegraphy

Systems

Position coordinate determination for writing

178 18, 345174, 345179, G08C 2100, G09G 302

Patent

active

057638390

ABSTRACT:
The present invention provides a method and a device for detecting position without producing discrepancy caused by residual induction voltage of a resonant circuit, wherein it includes steps for selecting and scanning one of a multiple loop coil positioned parallel to each other towards a detecting direction to receive an electromagnetic wave (S1), and calculating coordinate values of the indicated position provided by a position indicator based upon at least two detected induction voltages (S3), a direction for selecting and scanning of the loop coils is alternatively changed (S5, 6), and the coordinate values are averaged to eliminate the residual induction voltage effect (S8).

REFERENCES:
patent: 4575580 (1986-03-01), Jandrell
patent: 4878553 (1989-11-01), Yamanami et al.
patent: 5534886 (1996-07-01), Nomura et al.
patent: 5534892 (1996-07-01), Tagawa
patent: 5561447 (1996-10-01), Suzuki et al.
patent: 5606346 (1997-02-01), Kai et al.

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