Digitizer and position determination method therefor

Details Digitizer and position determination method therefor Digitizer and position determination method therefor

1995-03-27

1997-09-23

Kuntz, Curtis

Telegraphy

Systems

Position coordinate determination for writing

178 19, G09C 2100

Patent

active

056707541

ABSTRACT:
A digitizer and a method for calculating the position coordinates indicated by a position indicator on a tablet. The position indicator has a coil that electromagnetically interacts with the loop coil group of the tablet. A signal detection unit, a "sum" signal specifying unit, and a coordinate determination unit are utilized. The signal detection unit sequentially selects two loop coils as a loop coil pair from the loop coil group of the tablet and acquires a "sum" of and a "difference" between signals generated in respective coils of each loop coil pair. The "sum" signal specifying unit specifies one of the loop coil pairs of the loop coil group which generates a "sum" signal of a maximum absolute value when the coil of the position indicator and the loop coil group of the tablet are brought into an interaction state. The coordinate determination unit determines position coordinates on the tablet designated by the position indicator, on the basis of a "difference" signal of the specified loop coil pair.

REFERENCES:
patent: 4260852 (1981-04-01), Fencl
patent: 4477877 (1984-10-01), Nakamura et al.
patent: 4507523 (1985-03-01), Gohara
patent: 4616107 (1986-10-01), Abe et al.
patent: 4717793 (1988-01-01), Kobayashi
patent: 4848496 (1989-07-01), Murakami
patent: 4878553 (1989-11-01), Yamanami
patent: 5120907 (1992-06-01), Shinbori
patent: 5134253 (1992-07-01), Doubrava
patent: 5369227 (1994-11-01), Stone

Affiliated with

Also associated with

Rating

Digitizer and position determination method therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digitizer and position determination method therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digitizer and position determination method therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1939387