Method and apparatus for data input
US6222528A · kind A · utility
247Cited by
56References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1997 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Mar 7, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for providing accelerated X and Y axis position determination of a probe relative to a touchpad surface by enabling determination of the X and Y axis coordinates independent of each other. The apparatus of the present invention enables simplification of the electronics of the touchpad because fewer sense lines are required to achieve position resolution which is finer than the electrode pitch. Position determination is further accelerated because fewer position measurements are then required to compensate for such problems as probe symmetry duplication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.