Sensor array with split-drive differential sensing
US9740326B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2015 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Aug 22, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1359
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A device for capacitive sensing includes: a plurality of sensor electrodes, the plurality of sensor electrodes comprising: a plurality of receiver electrodes and a plurality of transmitter electrodes, wherein a transmitter electrode of the plurality of transmitter electrodes comprises a first portion and a second portion with a separation between the first portion and the second portion; and a processing system, configured to: drive the first portion of the transmitter electrode with a transmitter signal, receive a resulting signal corresponding to the first portion of the transmitter electrode via a first receiver electrode of the plurality of receiver electrodes, receive a reference signal corresponding to the second portion of the transmitter electrode via a second receiver electrode of the plurality of receiver electrodes, and determine a modified resulting signal based on the resulting signal and the reference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.