Detector and detection method for a capacitive touchpad to identify a real touch point
US8519975B2 · kind B2 · utility
15Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2010 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Dec 26, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04104
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A two-step detection for a capacitive touchpad to identify a real touch point first detects the self capacitances from multiple capacitance sensor traces of the capacitive touchpad to identify any touch point on the capacitive touchpad and then, if multiple touch points are detected, further detects the mutual capacitance at one of the detected touch points to identify whether it is a real touch point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.