Annular potentiometric touch sensor
US7310089B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2005 |
| Grant date | Dec 18, 2007 |
| Priority date | — |
| Expiry date | Apr 11, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0485
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention determines angular position using a potentiometric touch sensor. The sensor has an annular pattern of resistive material on a bottom substrate top surface. Conductive drive lines radially traverse the resistive material so as to make electrical connection with the resistive material. A top substrate is spaced above the top surface of the bottom substrate. A conductive sense layer on a bottom surface of the top substrate is positioned above the resistive material. Pressure applied to either the top substrate or the bottom substrate, such as by the touch of a user, causes a portion of the conductive sense layer to contact a corresponding portion of the annular pattern of resistive material. The angular position of the applied pressure can be determined by measuring at least one electrical parameter between at least one of the conductive drive lines and the conductive sense layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.