Touch and hover sensor compensation
US9836158B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2015 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Feb 25, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04111
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Compensation for sensors in a touch and hover sensing device is disclosed. Compensation can be for sensor resistance and/or sensor sensitivity variation that can adversely affect touch and hover measurements at the sensors. To compensate for sensor resistance, the device can gang adjacent sensors together so as to reduce the overall resistance of the sensors. In addition or alternatively, the device can drive the sensors with voltages from multiple directions so as to reduce the effects of the sensors' resistance. To compensate for sensor sensitivity variation (generally at issue for hover measurements), the device can apply a gain factor to the measurements, where the gain factor is a function of the sensor location, so as to reduce the sensitivity variation at different sensor locations on the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.