Self-capacitive touch and force sensing apparatus and self-capacitive touch and force sensing method
US10001892B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 18, 2017 |
| Grant date | Jun 19, 2018 |
| Priority date | — |
| Expiry date | Feb 17, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04107
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A self-capacitive touch and force sensing apparatus includes a metal layer, a sensing component layer, an air gap layer and a processing module. The sensing component layer is disposed above metal layer. The air gap layer is formed between metal layer and sensing component layer. When the self-capacitive touch and force sensing apparatus is operated in a self-capacitive touch sensing mode, metal layer is driven and synchronized with a touch signal, so that no capacitive effect between sensing component layer and metal layer and a first capacitance change is sensed; when the self-capacitive touch and force sensing apparatus is operated in a self-capacitive force sensing mode, metal layer is grounded, so that there is a capacitive effect between sensing component layer and metal layer and a second capacitance change is sensed. The processing module obtains a third capacitance change according to first capacitance change and second capacitance change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.