Capacitive sensing apparatus with a shield electrode
US9417740B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2013 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Jun 8, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04107
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus including a plurality of capacitive sensing cells distributed over a sensing area, wherein each capacitive sensing cell includes a capacitive sensor electrode and at least one switch; a plurality of output conductive traces, wherein each output conductive trace is configured to provide an output from multiple capacitive sensing cells; a plurality of control conductive traces, wherein each control conductive trace is configured to provide a control input to multiple capacitive sensing cells, wherein the switch of a capacitive sensing cell is configured to be controlled by one of the plurality of control conductive traces to enable a conductive path between the capacitive sensor electrode of the capacitive sensing cell and one of the plurality of output conductive traces; and a shield electrode overlying at least portions of the output conductive traces or the control conductive traces while exposing at least portions of the capacitive sensor electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.