Input device using magnetic field for input detection
US10459543B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2018 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Apr 22, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/03543
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Described are examples of an input device having a wheel with a plurality of teeth, where at least the plurality of teeth are composed of a ferrous or magnetic material. A magnet is disposed to provide a first magnetic field that attracts the ferrous or magnetic material of the plurality of teeth to provide a detent action when moving the wheel from a first position to a second position. A magnet sheet is disposed to provide a second magnetic field that causes the magnet sheet to deform based on magnetic attraction to the ferrous or magnetic material of the plurality of teeth when moving the wheel from the first position to the second position. A strain sensor coupled to the magnet sheet can detect a strain caused by deformation of the magnet sheet, and provide an electronic signal indicating the strain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.