Coordinates detecting apparatus for independently correcting coordinates
US6366866B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1999 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | Jan 26, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04182
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a coordinates detecting apparatus including a tablet for detecting X and Y coordinates and a correcting circuit for correcting the X and Y coordinates detected from the tablet, a parameter used for correcting the X coordinate and a parameter used for correcting the Y coordinate are adjustable independent from each other. More specifically, time constant of a CR filter circuit for the X coordinate and time constant of the CR filter circuit for the Y coordinate can be adjusted independent from each other. Further, numbers of A/D conversion, threshold values, number of samples and so on for the X and Y coordinates can be set independent from each other. As a result, in the coordinates detecting apparatus, noises in X and Y coordinates can be optimally removed, allowing detection of X and Y coordinates with high accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.