Coordinate detecting method
US4758690A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1987 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Mar 3, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/046
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A coordinate detecting method, adapted to a coordinate input device comprising an input plane having a plurality of parallel embedded loops, establishes a plurality of coarse regions while taking as a reference the polarity reversing positions of a magnetic field detected when these loops are scanned in sequence. The method comprises the steps of specifying one coarse region to be interpolated, interpolating the designation position of a coordinate designating member within the specified coarse region, and calculating the coordinate of the designation position on the basis of the coordinate position of the specified coarse region and an interpolation value obtained in the interpolating step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.