Synchronous timed orthogonal measurement pattern for multi-touch sensing on a touchpad
US9594452B2 · kind B2 · utility
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3References
16Claims
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Key dates
| Filing date | Jun 16, 2015 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Jun 16, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04808
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for detecting multiple objects on a touchpad having a grid of orthogonal electrodes, wherein all drive electrodes are simultaneously stimulated, and then frequency or electrode coding is used to separate each electrode junction and produce a capacitance image of the touchpad surface in a single measurement sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.