Eccentric rotating mass actuator optimization for haptic effects
US8791799B2 · kind B2 · utility
6Cited by
1References
24Claims
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Key dates
| Filing date | Jan 31, 2013 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | Feb 4, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/047
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system that generates a haptic effect using an Eccentric Rotating Mass (“ERM”) actuator determines a back electromotive force (“EMF”) of the ERM actuator and receives a haptic effect signal comprising one or more parameters, where one of the parameters is a voltage amplitude level as a function of time. The system varies the voltage amplitude level based at least on the back EMF, and applies the varied haptic effect signal to the ERM actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.