Capacitive keypad position sensor with low cross-interference
US9178511B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2014 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Jul 26, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960755
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A capacitive keypad position sensor includes a keypad touch panel having a first defined key area disposed in a plane having first and second orthogonal axes. First and second electrodes respectively occupy first and second areas below the first defined key area. Each electrode includes a plurality of parallel rows extending along the first axis and spaced apart from one another along the second axis. Each of the plurality of rows has a length along the first axis that is substantially equal to a width of the first defined key area along the first axis measured at a position along the second axis corresponding to the respective one of the plurality of rows. At least some of the first and second pluralities of rows are interleaved with one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.