Piezoelectric mirror system
US10578861B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2017 |
| Grant date | Mar 3, 2020 |
| Priority date | — |
| Expiry date | Jul 6, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB81B2201/042
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A piezo MEMS mirror system that includes a drive system that drives a piezo MEMS mirror that generates an image on a portable device display. The drive system includes a DC-AC converter that operates to convert the DC power provided by the battery to AC power. The DC-AC converter may generate the AC power having a peak voltage that is at an intermediate level—being between the DC voltage of the battery, and the peak AC voltage generated by the drive system. The drive system also includes an output filter that uses a series-coupled inductance system (perhaps inductively coupled inductors in a differential mode circuit) in conjunction with a capacitance of the piezo MEMS mirror (and perhaps tuning capacitors to account for mirror fabrication deviations) to amplify the AC voltage of the AC power at a mechanical resonant frequency of the piezo MEMS mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.