Touch sensing
US8525798B2 · kind B2 · utility
12Cited by
369References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 29, 2008 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Jan 23, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960775
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, an apparatus comprises a plurality of capacitors, each having a first electrode and a second electrode. The apparatus includes charging circuitry coupled to the first electrodes and sensing circuitry coupled to the second electrodes, the sensing circuitry configured to detect changes in capacitance across the capacitors responsive to movement of an input object relative to the apparatus. Interpolating circuitry identifies which one of the capacitors is nearest to the input object according to the detected capacitance changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.