Multi-touch disambiguation
US9575602B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2013 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Jun 11, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04104
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A capacitance sensing method may include performing a first scan of a plurality of sensor elements of a touch-sensing surface to detect a plurality of capacitance values indicating a presence of multiple contacts at the touch sensing surface. Based on the plurality of capacitance values, a plurality of coordinates may be calculated that indicate a plurality of possible contact locations for the multiple contacts. In response to detecting that the plurality of coordinates indicates the presence of the multiple contacts, a resolve scan of at least a first intersection of sensor elements may be performed, where the first intersection corresponds to at least one of the possible contact locations. Based on the resolve scan, at least one of the possible contact locations may be identified as an actual contact location of one of the multiple contacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.