Method and device for hybrid touch sensing
US10120487B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2016 |
| Grant date | Nov 6, 2018 |
| Priority date | — |
| Expiry date | Jul 23, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04106
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for hybrid touch sensing for detecting a normal touch and a force touch concurrently is provided. The method includes the following steps. Provide a first driving signal to a first capacitor, wherein the first driving signal is a periodic signal with a first frequency. Provide a second driving signal to a second capacitor, wherein the second driving signal is a periodic signal with a second frequency different from the first frequency. Generate a composite sensing signal by feeding the first driving signal and the second driving signal to a front-end circuit. Extract information from the composite sensing signal to calculate a first change in capacitance of the first capacitor and a second change in capacitance of the second capacitor to detect the normal touch and the force touch concurrently.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.