Sensor baseline compensation in a force-based touch device
US7337085B2 · kind B2 · utility
101Cited by
42References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 11, 2006 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Apr 11, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04144
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is method and device for compensating a force sensor signal for baseline error in a force-based touch screen. In one embodiment, baseline compensation includes determining a decaying maximum value and a decaying minimum value of the force sensor signal, and subtracting these values to obtain a range value. When the range value is less than a predetermined activity threshold, updating of the baseline is disabled. The decaying maximum value and decaying minimum value are reset to the current value of the force sensor signal when exceeded by the current value of the force sensor signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.