Low-power electromagnetic digitizer tablet
US4952757A · kind A · utility
29Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Nov 15, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/046
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A low-power electromagnetic digitizer table employing triangular-shaped electrodes arrayed in a single plane. A pointing device coil when energized induces signal voltages in the electrodes underneath. The electrodes are scanned in timed relation, and the induced voltages digitized and compared to determine the X/Y coordinates of the pointing device with respect to the electrode array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.