Sensing objects using multiple transmitter frequencies
US9946391B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2015 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Jun 26, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04106
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A processing system includes a sensor module coupled to sensor electrodes. The sensor module is configured to drive the sensor electrodes with first sensing signals and with second sensing signals at a second frequency. The processing system further includes a determination module configured to obtain, concurrently with the driving of the sensor electrodes, first measurement values that are based on effects of the first sensing signals, and a resonance of a pen in a sensing region. Concurrently with the driving of the sensor electrodes, second measurement values are obtained that are based on effects of the second sensing signals, and the resonance of the pen in the sensing region. The determination module determines a resonating state of the pen based on the first measurement values and the second measurement values, and reports the resonating state of the pen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.