Position detecting apparatus and position pointing device includ

Details Position detecting apparatus and position pointing device includ Position detecting apparatus and position pointing device includ

1995-06-15

1997-10-28

Kuntz, Curtis

Telegraphy

Systems

Position coordinate determination for writing

178 19, 345176, 345179, G08C 2100, G09G 302

Patent

active

056820194

ABSTRACT:
A position detecting apparatus is equipped with a sense section including a plurality of loop coils arranged parallel to each other along a position detecting direction. The plurality of loop coils are selected in turn by an electric-wave transmission unit to transmit an electric wave. The apparatus is further provided with a position pointing section having a resonance circuit composed of at least one coil and a capacitor. A time-measuring device measures a time period elapsed until a signal developing in the resonance circuit reaches a predetermined level after the electric-wave transmission unit starts the electric-wave transmission.

REFERENCES:
patent: 4878553 (1989-11-01), Yamanami et al.
patent: 4999461 (1991-03-01), Murakami
patent: 5028745 (1991-07-01), Yamanami
patent: 5214427 (1993-05-01), Yano
patent: 5434372 (1995-07-01), Lin

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