Transducer temperature sensing
US10663418B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2018 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Jun 28, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K7/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In described examples, one or more devices include: apparatus including a lens element and a transducer to vibrate the lens element at an operating frequency when operating in an activated state; and controller circuitry. The controller circuitry is arranged to measure an impedance of the apparatus, to determine an estimated temperature of the apparatus in response to the measured impedance, to compare the estimated temperature against a temperature threshold for delineating an operating temperature range of the apparatus, and to toggle an activation state of the transducer in response to comparing the estimated temperature against the temperature threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.