High accuracy digitizer system
US5854449A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1995 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | Sep 11, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04186
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A high accuracy digitizer system for determining the position of a pointer relative to a tablet comprising a tablet having a positional grid thereon, a processor for determining the coarse position of the pointer relative to the tablet, and an error correction system for generating the true position of the pointer relative to the tablet. In a particular embodiment, the pointer includes an electromagnetic transducer for inducing a signal in the positional grid and the processor is coupled to the positional grid for sensing the signal and generating the coarse position of the pointer. The error correction system receives the coarse position from the processor and generates a true position, the positional grid containing positional inaccuracies therein and the error correction system correcting for such inaccuracies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.