Surface position location system and method
US5686705A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1996 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Feb 15, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0441
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Electrographic sensor and method for position determination of a selected position thereon. Sensor includes a conductive material layer having electrical resistivity and a surface, at least three spaced apart contact points electrically interconnected with the layer, a processor connected to the contacts disposed to selectively apply a signal to each contact, and a probe assembly that includes either a stylus coupled to the processor with the stylus disposed to be positioned by a user in vicinity of the selected position on the layer, or a flexible layer with a user's finger selecting that position on the flexible layer to receive signals from the layer when the contact points have signals selectively applied. The selected position is determined by the processor from signals received from the stylus, or flexible layer, each in relation to a similar excitation of different pairs of the contacts. The conductive layer of either two or three dimensions including a closed three dimensional shape. With multiple layers the processor is able to discern on which layer the user selected position is located. Correction of the calculated coordinates of the selected position for variations in c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.