Touch-sensing device with a touch hold function and a corresponding method
US8749517B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2010 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Aug 11, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04106
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a touch-sensing device comprising an interaction surface with a touch location system for determining a touch position based on an acoustic signal. Gaskets, forming a means for acoustically isolating the interaction surface from the underground on which it is placed, are provided with an upper electrode and a lower electrode. The gaskets are elastically compressible and have dielectric properties, so that the two electrodes and the gasket form a capacitor with a capacitance that varies with the force applied to the interaction surface. In addition to the touch position determined by the acoustic signal, the touch-sensing device detects a touch duration based on capacitance variations, so that touch events can be classified according to their duration. The invention also relates to the corresponding method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.