Contact detection mode switching in a touchscreen device
US9983738B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2014 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Dec 22, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04112
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for determining detecting a conductive object and determining the type of object and the type of contact that object has with a touch sensitive surface, the method comprising measuring capacitance on a plurality of mutual capacitance sensors, each mutual capacitance sensor corresponding to a unit cell in an array of unit cells. After mutual capacitance is measured a peak unit cell is identified based on the measured capacitances and a matrix sum of a plurality of unit cells surround the peak unit cell is calculated. The value of the peak unit cell and the matrix sum are then compared to a range and a contact type determined based on the comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.