Apparatus and method for determining a touch input
US8866497B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2010 |
| Grant date | Oct 21, 2014 |
| Priority date | — |
| Expiry date | Aug 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0443
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A capacitive sensor for detecting a stimulus. The capacitive sensor includes an electrode and a processing unit electrically coupled to the electrode and configured to determine the presence of a stimulus based on the rate of change of the electrode capacitance. A substrate is positioned adjacent the electrode, wherein the stimulus corresponds to the placement of an object against the substrate. The processing unit is operative to determine a time rate of change based on successive measurements of the electrode capacitance. In addition, the processing unit is operative to determine the presence of a stimulus in response to the time rate of change being less than a reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.