Hover position calculation in a touchscreen device
US9684409B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2015 |
| Grant date | Jun 20, 2017 |
| Priority date | — |
| Expiry date | Dec 15, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04108
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method calculates the position of a conductive object hovering above a plurality of mutual capacitance sensors, where each mutual capacitance sensor is represented as a unit cell in an array of unit cells. The method measures the capacitance of each sensor. The method identifies a peak unit cell based on the measured capacitances and calculates an edge cutoff value. A plurality of unit cells with measured capacitances within a range defined by the edge cutoff value are selected and the position of the hovering object is calculated. In some embodiments, the array comprises a first plurality of capacitance sensing electrodes disposed along a first axis and a second plurality of capacitance sensing electrodes disposed along a second axis. In some embodiments, the array and a controller form a user interface device, and the controller is configured to calculate the position of the conductive object using the method described above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.