Touch panel excitation using a drive signal having time-varying characteristics
US9098153B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2012 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Oct 18, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/045
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A capacitive touch panel may include a driver and a drive electrode configured to be connected to the driver. The driver is configured to power the drive electrode with a drive signal having a first signal characteristic during a first time interval, and a second signal characteristic different from the first signal characteristic during a second time interval subsequent to the first time interval. The first signal characteristic may comprise one or more of a first frequency, a first phase, or a first amplitude during the first time interval, and the second signal characteristic may comprise one or more of a second frequency, a second phase, or a second amplitude, where one or more of the first frequency, first phase, or first amplitude may be different from one or more of the second frequency, second phase, or second amplitude, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.