Keystroke detection device, keyboard, and keystroke detection method
US11817857B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 2021 |
| Grant date | Nov 14, 2023 |
| Priority date | — |
| Expiry date | Mar 19, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2017/9706
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to an apparatus for detecting a key press comprising a circuit substrate, to a key module with a key cap and a movement mechanism, and to a device for detecting the movement of the key cap, wherein this device comprises an electrical resonance circuit with a primary coil and a secondary coil with a short-circuited winding, which secondary coil is moved with the key cap, wherein the primary coil and the secondary coil are inductively coupled to one another, and the strength of the inductive coupling between the primary coil and secondary coil and thus at least one physical variable of the resonance circuit change during the movement of the key cap.The invention also relates to a keyboard comprising one or more such apparatuses and to a method for detecting a key press.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.