Sensing force and press location in absence of touch information
US10871847B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2018 |
| Grant date | Dec 22, 2020 |
| Priority date | — |
| Expiry date | Jan 5, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04106
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed are electronic devices and methods of their operation that use force sensors to detect user applied forces on an input surface and determine their locations on the input surface, using only force sensors. The locations may be determined using weighted averages of the positions of the force sensors and their values. The methods may compare dynamically updated baseline force values to received force sensor values to distinguish user applied forces from changes in the force sensor values caused other sources. After detection of a user applied force, the baseline force values are frozen, and the force sensor values used to find the location on the input surface where the user applied the force. The electronic device can operate according to a state space model, with a first state in which there is no user applied force, and a second state in which there is user applied force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.