Coordinate determining device
US4477877A · kind A · utility
29Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1981 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Jun 10, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/046
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A coordinate determining device comprised of a tablet having a plurality of sensing lines disposed thereon, and a magnetic field generator positionable relative to the sensing lines for indicating the coordinates of the magnetic field generator position. Detecting circuitry detects induced electromotive voltages from the sensing lines, and an arithmetic control unit computes the position of the magnetic field generating coordinate indicator and corrects for position errors caused by inclination of the magnetic field generating coordinate indicator relative to the tablet having the sensing lines disposed thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.