Differential readout for sensor array
US9823794B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2015 |
| Grant date | Nov 21, 2017 |
| Priority date | — |
| Expiry date | Dec 3, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1306
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An input device for capacitive touch sensing includes: a plurality of sensor electrodes, the plurality of sensor electrodes comprising: a plurality of receiver electrodes, a plurality of transmitter electrodes, and a reference receiver electrode; and a processing system. The processing system is configured to: drive a first transmitter electrode of the plurality of transmitter electrodes with a transmitter signal, receive a resulting signal via a receiver electrode of the plurality of receiver electrode, the resulting signal comprising effects corresponding to the transmitter signal, receive a reference signal via the reference receiver electrode, and determine a modified resulting signal based on the resulting signal received via the receiver electrode and the reference signal received via the reference receiver electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.