System and method for calibrating an electro-permanent magnet key switch assembly
US10797699B1 · kind B1 · utility
6Cited by
0References
20Claims
0Family size
Assignee
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Key dates
| Filing date | May 7, 2019 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | May 7, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2231/042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electro-permanent magnet (EPM) key assembly of an information handling system may include an electro-permanent magnet (EPM) that may include a low-coercivity magnet and a high-coercivity magnet and a magnetic field sensor to detect the magnitude of the magnetic field of the EPM; and a calibration module to calibrate the magnitude of the magnetic field of the EPM by receiving a sensed magnitude value of the magnetic field of the EPM and adjusting the magnitude value of the magnetic field of the EPM when that magnitude value deviates from an established value by a threshold amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.