Digitized controller for position locator
US4990726A · kind A · utility
5Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Nov 7, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/046
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digitizer tablet uses sequenced wire addressing to derive time-related voltages correlated to the location of the addressed wires. The voltages are digitized, and an algorithm followed to determine by interpolation the exact position of a pointing device over the addressed wires. The algorithm employs a calculation based on determining the X-intercept of a straight line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.